1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
4 Copyright 2023 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 if (hci_dev_test_flag(hdev, HCI_MESH))
1728 hci_discovery_set_state(hdev, DISCOVERY_FINDING);
1729 break;
1730
1731 case LE_SCAN_DISABLE:
1732 /* We do this here instead of when setting DISCOVERY_STOPPED
1733 * since the latter would potentially require waiting for
1734 * inquiry to stop too.
1735 */
1736 if (has_pending_adv_report(hdev)) {
1737 struct discovery_state *d = &hdev->discovery;
1738
1739 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
1740 d->last_adv_addr_type, NULL,
1741 d->last_adv_rssi, d->last_adv_flags,
1742 d->last_adv_data,
1743 d->last_adv_data_len, NULL, 0, 0);
1744 }
1745
1746 /* Cancel this timer so that we don't try to disable scanning
1747 * when it's already disabled.
1748 */
1749 cancel_delayed_work(&hdev->le_scan_disable);
1750
1751 hci_dev_clear_flag(hdev, HCI_LE_SCAN);
1752
1753 /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we
1754 * interrupted scanning due to a connect request. Mark
1755 * therefore discovery as stopped.
1756 */
1757 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED))
1758 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1759 else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) &&
1760 hdev->discovery.state == DISCOVERY_FINDING)
1761 queue_work(hdev->workqueue, &hdev->reenable_adv_work);
1762
1763 break;
1764
1765 default:
1766 bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d",
1767 enable);
1768 break;
1769 }
1770
1771 hci_dev_unlock(hdev);
1772 }
1773
hci_cc_le_set_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1774 static u8 hci_cc_le_set_scan_enable(struct hci_dev *hdev, void *data,
1775 struct sk_buff *skb)
1776 {
1777 struct hci_cp_le_set_scan_enable *cp;
1778 struct hci_ev_status *rp = data;
1779
1780 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1781
1782 if (rp->status)
1783 return rp->status;
1784
1785 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
1786 if (!cp)
1787 return rp->status;
1788
1789 le_set_scan_enable_complete(hdev, cp->enable);
1790
1791 return rp->status;
1792 }
1793
hci_cc_le_set_ext_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1794 static u8 hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev, void *data,
1795 struct sk_buff *skb)
1796 {
1797 struct hci_cp_le_set_ext_scan_enable *cp;
1798 struct hci_ev_status *rp = data;
1799
1800 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1801
1802 if (rp->status)
1803 return rp->status;
1804
1805 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE);
1806 if (!cp)
1807 return rp->status;
1808
1809 le_set_scan_enable_complete(hdev, cp->enable);
1810
1811 return rp->status;
1812 }
1813
hci_cc_le_read_num_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1814 static u8 hci_cc_le_read_num_adv_sets(struct hci_dev *hdev, void *data,
1815 struct sk_buff *skb)
1816 {
1817 struct hci_rp_le_read_num_supported_adv_sets *rp = data;
1818
1819 bt_dev_dbg(hdev, "status 0x%2.2x No of Adv sets %u", rp->status,
1820 rp->num_of_sets);
1821
1822 if (rp->status)
1823 return rp->status;
1824
1825 hdev->le_num_of_adv_sets = rp->num_of_sets;
1826
1827 return rp->status;
1828 }
1829
hci_cc_le_read_accept_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1830 static u8 hci_cc_le_read_accept_list_size(struct hci_dev *hdev, void *data,
1831 struct sk_buff *skb)
1832 {
1833 struct hci_rp_le_read_accept_list_size *rp = data;
1834
1835 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
1836
1837 if (rp->status)
1838 return rp->status;
1839
1840 hdev->le_accept_list_size = rp->size;
1841
1842 return rp->status;
1843 }
1844
hci_cc_le_clear_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1845 static u8 hci_cc_le_clear_accept_list(struct hci_dev *hdev, void *data,
1846 struct sk_buff *skb)
1847 {
1848 struct hci_ev_status *rp = data;
1849
1850 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1851
1852 if (rp->status)
1853 return rp->status;
1854
1855 hci_dev_lock(hdev);
1856 hci_bdaddr_list_clear(&hdev->le_accept_list);
1857 hci_dev_unlock(hdev);
1858
1859 return rp->status;
1860 }
1861
hci_cc_le_add_to_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1862 static u8 hci_cc_le_add_to_accept_list(struct hci_dev *hdev, void *data,
1863 struct sk_buff *skb)
1864 {
1865 struct hci_cp_le_add_to_accept_list *sent;
1866 struct hci_ev_status *rp = data;
1867
1868 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1869
1870 if (rp->status)
1871 return rp->status;
1872
1873 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
1874 if (!sent)
1875 return rp->status;
1876
1877 hci_dev_lock(hdev);
1878 hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr,
1879 sent->bdaddr_type);
1880 hci_dev_unlock(hdev);
1881
1882 return rp->status;
1883 }
1884
hci_cc_le_del_from_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1885 static u8 hci_cc_le_del_from_accept_list(struct hci_dev *hdev, void *data,
1886 struct sk_buff *skb)
1887 {
1888 struct hci_cp_le_del_from_accept_list *sent;
1889 struct hci_ev_status *rp = data;
1890
1891 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1892
1893 if (rp->status)
1894 return rp->status;
1895
1896 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST);
1897 if (!sent)
1898 return rp->status;
1899
1900 hci_dev_lock(hdev);
1901 hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr,
1902 sent->bdaddr_type);
1903 hci_dev_unlock(hdev);
1904
1905 return rp->status;
1906 }
1907
hci_cc_le_read_supported_states(struct hci_dev * hdev,void * data,struct sk_buff * skb)1908 static u8 hci_cc_le_read_supported_states(struct hci_dev *hdev, void *data,
1909 struct sk_buff *skb)
1910 {
1911 struct hci_rp_le_read_supported_states *rp = data;
1912
1913 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1914
1915 if (rp->status)
1916 return rp->status;
1917
1918 memcpy(hdev->le_states, rp->le_states, 8);
1919
1920 return rp->status;
1921 }
1922
hci_cc_le_read_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1923 static u8 hci_cc_le_read_def_data_len(struct hci_dev *hdev, void *data,
1924 struct sk_buff *skb)
1925 {
1926 struct hci_rp_le_read_def_data_len *rp = data;
1927
1928 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1929
1930 if (rp->status)
1931 return rp->status;
1932
1933 hdev->le_def_tx_len = le16_to_cpu(rp->tx_len);
1934 hdev->le_def_tx_time = le16_to_cpu(rp->tx_time);
1935
1936 return rp->status;
1937 }
1938
hci_cc_le_write_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1939 static u8 hci_cc_le_write_def_data_len(struct hci_dev *hdev, void *data,
1940 struct sk_buff *skb)
1941 {
1942 struct hci_cp_le_write_def_data_len *sent;
1943 struct hci_ev_status *rp = data;
1944
1945 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1946
1947 if (rp->status)
1948 return rp->status;
1949
1950 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN);
1951 if (!sent)
1952 return rp->status;
1953
1954 hdev->le_def_tx_len = le16_to_cpu(sent->tx_len);
1955 hdev->le_def_tx_time = le16_to_cpu(sent->tx_time);
1956
1957 return rp->status;
1958 }
1959
hci_cc_le_add_to_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1960 static u8 hci_cc_le_add_to_resolv_list(struct hci_dev *hdev, void *data,
1961 struct sk_buff *skb)
1962 {
1963 struct hci_cp_le_add_to_resolv_list *sent;
1964 struct hci_ev_status *rp = data;
1965
1966 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1967
1968 if (rp->status)
1969 return rp->status;
1970
1971 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST);
1972 if (!sent)
1973 return rp->status;
1974
1975 hci_dev_lock(hdev);
1976 hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
1977 sent->bdaddr_type, sent->peer_irk,
1978 sent->local_irk);
1979 hci_dev_unlock(hdev);
1980
1981 return rp->status;
1982 }
1983
hci_cc_le_del_from_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1984 static u8 hci_cc_le_del_from_resolv_list(struct hci_dev *hdev, void *data,
1985 struct sk_buff *skb)
1986 {
1987 struct hci_cp_le_del_from_resolv_list *sent;
1988 struct hci_ev_status *rp = data;
1989
1990 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1991
1992 if (rp->status)
1993 return rp->status;
1994
1995 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST);
1996 if (!sent)
1997 return rp->status;
1998
1999 hci_dev_lock(hdev);
2000 hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
2001 sent->bdaddr_type);
2002 hci_dev_unlock(hdev);
2003
2004 return rp->status;
2005 }
2006
hci_cc_le_clear_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)2007 static u8 hci_cc_le_clear_resolv_list(struct hci_dev *hdev, void *data,
2008 struct sk_buff *skb)
2009 {
2010 struct hci_ev_status *rp = data;
2011
2012 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2013
2014 if (rp->status)
2015 return rp->status;
2016
2017 hci_dev_lock(hdev);
2018 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2019 hci_dev_unlock(hdev);
2020
2021 return rp->status;
2022 }
2023
hci_cc_le_read_resolv_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)2024 static u8 hci_cc_le_read_resolv_list_size(struct hci_dev *hdev, void *data,
2025 struct sk_buff *skb)
2026 {
2027 struct hci_rp_le_read_resolv_list_size *rp = data;
2028
2029 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
2030
2031 if (rp->status)
2032 return rp->status;
2033
2034 hdev->le_resolv_list_size = rp->size;
2035
2036 return rp->status;
2037 }
2038
hci_cc_le_set_addr_resolution_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)2039 static u8 hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev, void *data,
2040 struct sk_buff *skb)
2041 {
2042 struct hci_ev_status *rp = data;
2043 __u8 *sent;
2044
2045 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2046
2047 if (rp->status)
2048 return rp->status;
2049
2050 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE);
2051 if (!sent)
2052 return rp->status;
2053
2054 hci_dev_lock(hdev);
2055
2056 if (*sent)
2057 hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION);
2058 else
2059 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);
2060
2061 hci_dev_unlock(hdev);
2062
2063 return rp->status;
2064 }
2065
hci_cc_le_read_max_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)2066 static u8 hci_cc_le_read_max_data_len(struct hci_dev *hdev, void *data,
2067 struct sk_buff *skb)
2068 {
2069 struct hci_rp_le_read_max_data_len *rp = data;
2070
2071 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2072
2073 if (rp->status)
2074 return rp->status;
2075
2076 hdev->le_max_tx_len = le16_to_cpu(rp->tx_len);
2077 hdev->le_max_tx_time = le16_to_cpu(rp->tx_time);
2078 hdev->le_max_rx_len = le16_to_cpu(rp->rx_len);
2079 hdev->le_max_rx_time = le16_to_cpu(rp->rx_time);
2080
2081 return rp->status;
2082 }
2083
hci_cc_write_le_host_supported(struct hci_dev * hdev,void * data,struct sk_buff * skb)2084 static u8 hci_cc_write_le_host_supported(struct hci_dev *hdev, void *data,
2085 struct sk_buff *skb)
2086 {
2087 struct hci_cp_write_le_host_supported *sent;
2088 struct hci_ev_status *rp = data;
2089
2090 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2091
2092 if (rp->status)
2093 return rp->status;
2094
2095 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED);
2096 if (!sent)
2097 return rp->status;
2098
2099 hci_dev_lock(hdev);
2100
2101 if (sent->le) {
2102 hdev->features[1][0] |= LMP_HOST_LE;
2103 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
2104 } else {
2105 hdev->features[1][0] &= ~LMP_HOST_LE;
2106 hci_dev_clear_flag(hdev, HCI_LE_ENABLED);
2107 hci_dev_clear_flag(hdev, HCI_ADVERTISING);
2108 }
2109
2110 if (sent->simul)
2111 hdev->features[1][0] |= LMP_HOST_LE_BREDR;
2112 else
2113 hdev->features[1][0] &= ~LMP_HOST_LE_BREDR;
2114
2115 hci_dev_unlock(hdev);
2116
2117 return rp->status;
2118 }
2119
hci_cc_set_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2120 static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data,
2121 struct sk_buff *skb)
2122 {
2123 struct hci_cp_le_set_adv_param *cp;
2124 struct hci_ev_status *rp = data;
2125
2126 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2127
2128 if (rp->status)
2129 return rp->status;
2130
2131 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM);
2132 if (!cp)
2133 return rp->status;
2134
2135 hci_dev_lock(hdev);
2136 hdev->adv_addr_type = cp->own_address_type;
2137 hci_dev_unlock(hdev);
2138
2139 return rp->status;
2140 }
2141
hci_cc_set_ext_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2142 static u8 hci_cc_set_ext_adv_param(struct hci_dev *hdev, void *data,
2143 struct sk_buff *skb)
2144 {
2145 struct hci_rp_le_set_ext_adv_params *rp = data;
2146 struct hci_cp_le_set_ext_adv_params *cp;
2147 struct adv_info *adv_instance;
2148
2149 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2150
2151 if (rp->status)
2152 return rp->status;
2153
2154 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS);
2155 if (!cp)
2156 return rp->status;
2157
2158 hci_dev_lock(hdev);
2159 hdev->adv_addr_type = cp->own_addr_type;
2160 if (!cp->handle) {
2161 /* Store in hdev for instance 0 */
2162 hdev->adv_tx_power = rp->tx_power;
2163 } else {
2164 adv_instance = hci_find_adv_instance(hdev, cp->handle);
2165 if (adv_instance)
2166 adv_instance->tx_power = rp->tx_power;
2167 }
2168 /* Update adv data as tx power is known now */
2169 hci_update_adv_data(hdev, cp->handle);
2170
2171 hci_dev_unlock(hdev);
2172
2173 return rp->status;
2174 }
2175
hci_cc_read_rssi(struct hci_dev * hdev,void * data,struct sk_buff * skb)2176 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data,
2177 struct sk_buff *skb)
2178 {
2179 struct hci_rp_read_rssi *rp = data;
2180 struct hci_conn *conn;
2181
2182 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2183
2184 if (rp->status)
2185 return rp->status;
2186
2187 hci_dev_lock(hdev);
2188
2189 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2190 if (conn)
2191 conn->rssi = rp->rssi;
2192
2193 hci_dev_unlock(hdev);
2194
2195 return rp->status;
2196 }
2197
hci_cc_read_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)2198 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data,
2199 struct sk_buff *skb)
2200 {
2201 struct hci_cp_read_tx_power *sent;
2202 struct hci_rp_read_tx_power *rp = data;
2203 struct hci_conn *conn;
2204
2205 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2206
2207 if (rp->status)
2208 return rp->status;
2209
2210 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
2211 if (!sent)
2212 return rp->status;
2213
2214 hci_dev_lock(hdev);
2215
2216 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2217 if (!conn)
2218 goto unlock;
2219
2220 switch (sent->type) {
2221 case 0x00:
2222 conn->tx_power = rp->tx_power;
2223 break;
2224 case 0x01:
2225 conn->max_tx_power = rp->tx_power;
2226 break;
2227 }
2228
2229 unlock:
2230 hci_dev_unlock(hdev);
2231 return rp->status;
2232 }
2233
hci_cc_write_ssp_debug_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)2234 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data,
2235 struct sk_buff *skb)
2236 {
2237 struct hci_ev_status *rp = data;
2238 u8 *mode;
2239
2240 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2241
2242 if (rp->status)
2243 return rp->status;
2244
2245 mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
2246 if (mode)
2247 hdev->ssp_debug_mode = *mode;
2248
2249 return rp->status;
2250 }
2251
hci_cs_inquiry(struct hci_dev * hdev,__u8 status)2252 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
2253 {
2254 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2255
2256 if (status)
2257 return;
2258
2259 if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
2260 set_bit(HCI_INQUIRY, &hdev->flags);
2261 }
2262
hci_cs_create_conn(struct hci_dev * hdev,__u8 status)2263 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
2264 {
2265 struct hci_cp_create_conn *cp;
2266 struct hci_conn *conn;
2267
2268 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2269
2270 cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
2271 if (!cp)
2272 return;
2273
2274 hci_dev_lock(hdev);
2275
2276 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2277
2278 bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn);
2279
2280 if (status) {
2281 if (conn && conn->state == BT_CONNECT) {
2282 conn->state = BT_CLOSED;
2283 hci_connect_cfm(conn, status);
2284 hci_conn_del(conn);
2285 }
2286 } else {
2287 if (!conn) {
2288 conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
2289 HCI_ROLE_MASTER);
2290 if (IS_ERR(conn))
2291 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
2292 }
2293 }
2294
2295 hci_dev_unlock(hdev);
2296 }
2297
hci_cs_add_sco(struct hci_dev * hdev,__u8 status)2298 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
2299 {
2300 struct hci_cp_add_sco *cp;
2301 struct hci_conn *acl;
2302 struct hci_link *link;
2303 __u16 handle;
2304
2305 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2306
2307 if (!status)
2308 return;
2309
2310 cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
2311 if (!cp)
2312 return;
2313
2314 handle = __le16_to_cpu(cp->handle);
2315
2316 bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
2317
2318 hci_dev_lock(hdev);
2319
2320 acl = hci_conn_hash_lookup_handle(hdev, handle);
2321 if (acl) {
2322 link = list_first_entry_or_null(&acl->link_list,
2323 struct hci_link, list);
2324 if (link && link->conn) {
2325 link->conn->state = BT_CLOSED;
2326
2327 hci_connect_cfm(link->conn, status);
2328 hci_conn_del(link->conn);
2329 }
2330 }
2331
2332 hci_dev_unlock(hdev);
2333 }
2334
hci_cs_auth_requested(struct hci_dev * hdev,__u8 status)2335 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
2336 {
2337 struct hci_cp_auth_requested *cp;
2338 struct hci_conn *conn;
2339
2340 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2341
2342 if (!status)
2343 return;
2344
2345 cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
2346 if (!cp)
2347 return;
2348
2349 hci_dev_lock(hdev);
2350
2351 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2352 if (conn) {
2353 if (conn->state == BT_CONFIG) {
2354 hci_connect_cfm(conn, status);
2355 hci_conn_drop(conn);
2356 }
2357 }
2358
2359 hci_dev_unlock(hdev);
2360 }
2361
hci_cs_set_conn_encrypt(struct hci_dev * hdev,__u8 status)2362 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
2363 {
2364 struct hci_cp_set_conn_encrypt *cp;
2365 struct hci_conn *conn;
2366
2367 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2368
2369 if (!status)
2370 return;
2371
2372 cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
2373 if (!cp)
2374 return;
2375
2376 hci_dev_lock(hdev);
2377
2378 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2379 if (conn) {
2380 if (conn->state == BT_CONFIG) {
2381 hci_connect_cfm(conn, status);
2382 hci_conn_drop(conn);
2383 }
2384 }
2385
2386 hci_dev_unlock(hdev);
2387 }
2388
hci_outgoing_auth_needed(struct hci_dev * hdev,struct hci_conn * conn)2389 static int hci_outgoing_auth_needed(struct hci_dev *hdev,
2390 struct hci_conn *conn)
2391 {
2392 if (conn->state != BT_CONFIG || !conn->out)
2393 return 0;
2394
2395 if (conn->pending_sec_level == BT_SECURITY_SDP)
2396 return 0;
2397
2398 /* Only request authentication for SSP connections or non-SSP
2399 * devices with sec_level MEDIUM or HIGH or if MITM protection
2400 * is requested.
2401 */
2402 if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
2403 conn->pending_sec_level != BT_SECURITY_FIPS &&
2404 conn->pending_sec_level != BT_SECURITY_HIGH &&
2405 conn->pending_sec_level != BT_SECURITY_MEDIUM)
2406 return 0;
2407
2408 return 1;
2409 }
2410
hci_resolve_name(struct hci_dev * hdev,struct inquiry_entry * e)2411 static int hci_resolve_name(struct hci_dev *hdev,
2412 struct inquiry_entry *e)
2413 {
2414 struct hci_cp_remote_name_req cp;
2415
2416 memset(&cp, 0, sizeof(cp));
2417
2418 bacpy(&cp.bdaddr, &e->data.bdaddr);
2419 cp.pscan_rep_mode = e->data.pscan_rep_mode;
2420 cp.pscan_mode = e->data.pscan_mode;
2421 cp.clock_offset = e->data.clock_offset;
2422
2423 return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
2424 }
2425
hci_resolve_next_name(struct hci_dev * hdev)2426 static bool hci_resolve_next_name(struct hci_dev *hdev)
2427 {
2428 struct discovery_state *discov = &hdev->discovery;
2429 struct inquiry_entry *e;
2430
2431 if (list_empty(&discov->resolve))
2432 return false;
2433
2434 /* We should stop if we already spent too much time resolving names. */
2435 if (time_after(jiffies, discov->name_resolve_timeout)) {
2436 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long.");
2437 return false;
2438 }
2439
2440 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2441 if (!e)
2442 return false;
2443
2444 if (hci_resolve_name(hdev, e) == 0) {
2445 e->name_state = NAME_PENDING;
2446 return true;
2447 }
2448
2449 return false;
2450 }
2451
hci_check_pending_name(struct hci_dev * hdev,struct hci_conn * conn,bdaddr_t * bdaddr,u8 * name,u8 name_len)2452 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
2453 bdaddr_t *bdaddr, u8 *name, u8 name_len)
2454 {
2455 struct discovery_state *discov = &hdev->discovery;
2456 struct inquiry_entry *e;
2457
2458 /* Update the mgmt connected state if necessary. Be careful with
2459 * conn objects that exist but are not (yet) connected however.
2460 * Only those in BT_CONFIG or BT_CONNECTED states can be
2461 * considered connected.
2462 */
2463 if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED))
2464 mgmt_device_connected(hdev, conn, name, name_len);
2465
2466 if (discov->state == DISCOVERY_STOPPED)
2467 return;
2468
2469 if (discov->state == DISCOVERY_STOPPING)
2470 goto discov_complete;
2471
2472 if (discov->state != DISCOVERY_RESOLVING)
2473 return;
2474
2475 e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
2476 /* If the device was not found in a list of found devices names of which
2477 * are pending. there is no need to continue resolving a next name as it
2478 * will be done upon receiving another Remote Name Request Complete
2479 * Event */
2480 if (!e)
2481 return;
2482
2483 list_del(&e->list);
2484
2485 e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN;
2486 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi,
2487 name, name_len);
2488
2489 if (hci_resolve_next_name(hdev))
2490 return;
2491
2492 discov_complete:
2493 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2494 }
2495
hci_cs_remote_name_req(struct hci_dev * hdev,__u8 status)2496 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
2497 {
2498 struct hci_cp_remote_name_req *cp;
2499 struct hci_conn *conn;
2500
2501 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2502
2503 /* If successful wait for the name req complete event before
2504 * checking for the need to do authentication */
2505 if (!status)
2506 return;
2507
2508 cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
2509 if (!cp)
2510 return;
2511
2512 hci_dev_lock(hdev);
2513
2514 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2515
2516 if (hci_dev_test_flag(hdev, HCI_MGMT))
2517 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
2518
2519 if (!conn)
2520 goto unlock;
2521
2522 if (!hci_outgoing_auth_needed(hdev, conn))
2523 goto unlock;
2524
2525 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2526 struct hci_cp_auth_requested auth_cp;
2527
2528 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2529
2530 auth_cp.handle = __cpu_to_le16(conn->handle);
2531 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
2532 sizeof(auth_cp), &auth_cp);
2533 }
2534
2535 unlock:
2536 hci_dev_unlock(hdev);
2537 }
2538
hci_cs_read_remote_features(struct hci_dev * hdev,__u8 status)2539 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
2540 {
2541 struct hci_cp_read_remote_features *cp;
2542 struct hci_conn *conn;
2543
2544 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2545
2546 if (!status)
2547 return;
2548
2549 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
2550 if (!cp)
2551 return;
2552
2553 hci_dev_lock(hdev);
2554
2555 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2556 if (conn) {
2557 if (conn->state == BT_CONFIG) {
2558 hci_connect_cfm(conn, status);
2559 hci_conn_drop(conn);
2560 }
2561 }
2562
2563 hci_dev_unlock(hdev);
2564 }
2565
hci_cs_read_remote_ext_features(struct hci_dev * hdev,__u8 status)2566 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
2567 {
2568 struct hci_cp_read_remote_ext_features *cp;
2569 struct hci_conn *conn;
2570
2571 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2572
2573 if (!status)
2574 return;
2575
2576 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
2577 if (!cp)
2578 return;
2579
2580 hci_dev_lock(hdev);
2581
2582 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2583 if (conn) {
2584 if (conn->state == BT_CONFIG) {
2585 hci_connect_cfm(conn, status);
2586 hci_conn_drop(conn);
2587 }
2588 }
2589
2590 hci_dev_unlock(hdev);
2591 }
2592
hci_setup_sync_conn_status(struct hci_dev * hdev,__u16 handle,__u8 status)2593 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle,
2594 __u8 status)
2595 {
2596 struct hci_conn *acl;
2597 struct hci_link *link;
2598
2599 bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status);
2600
2601 hci_dev_lock(hdev);
2602
2603 acl = hci_conn_hash_lookup_handle(hdev, handle);
2604 if (acl) {
2605 link = list_first_entry_or_null(&acl->link_list,
2606 struct hci_link, list);
2607 if (link && link->conn) {
2608 link->conn->state = BT_CLOSED;
2609
2610 hci_connect_cfm(link->conn, status);
2611 hci_conn_del(link->conn);
2612 }
2613 }
2614
2615 hci_dev_unlock(hdev);
2616 }
2617
hci_cs_setup_sync_conn(struct hci_dev * hdev,__u8 status)2618 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2619 {
2620 struct hci_cp_setup_sync_conn *cp;
2621
2622 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2623
2624 if (!status)
2625 return;
2626
2627 cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
2628 if (!cp)
2629 return;
2630
2631 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2632 }
2633
hci_cs_enhanced_setup_sync_conn(struct hci_dev * hdev,__u8 status)2634 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2635 {
2636 struct hci_cp_enhanced_setup_sync_conn *cp;
2637
2638 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2639
2640 if (!status)
2641 return;
2642
2643 cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN);
2644 if (!cp)
2645 return;
2646
2647 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2648 }
2649
hci_cs_sniff_mode(struct hci_dev * hdev,__u8 status)2650 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
2651 {
2652 struct hci_cp_sniff_mode *cp;
2653 struct hci_conn *conn;
2654
2655 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2656
2657 if (!status)
2658 return;
2659
2660 cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
2661 if (!cp)
2662 return;
2663
2664 hci_dev_lock(hdev);
2665
2666 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2667 if (conn) {
2668 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2669
2670 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2671 hci_sco_setup(conn, status);
2672 }
2673
2674 hci_dev_unlock(hdev);
2675 }
2676
hci_cs_exit_sniff_mode(struct hci_dev * hdev,__u8 status)2677 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
2678 {
2679 struct hci_cp_exit_sniff_mode *cp;
2680 struct hci_conn *conn;
2681
2682 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2683
2684 if (!status)
2685 return;
2686
2687 cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
2688 if (!cp)
2689 return;
2690
2691 hci_dev_lock(hdev);
2692
2693 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2694 if (conn) {
2695 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2696
2697 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2698 hci_sco_setup(conn, status);
2699 }
2700
2701 hci_dev_unlock(hdev);
2702 }
2703
hci_cs_disconnect(struct hci_dev * hdev,u8 status)2704 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
2705 {
2706 struct hci_cp_disconnect *cp;
2707 struct hci_conn_params *params;
2708 struct hci_conn *conn;
2709 bool mgmt_conn;
2710
2711 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2712
2713 /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
2714 * otherwise cleanup the connection immediately.
2715 */
2716 if (!status && !hdev->suspended)
2717 return;
2718
2719 cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
2720 if (!cp)
2721 return;
2722
2723 hci_dev_lock(hdev);
2724
2725 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2726 if (!conn)
2727 goto unlock;
2728
2729 if (status) {
2730 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2731 conn->dst_type, status);
2732
2733 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
2734 hdev->cur_adv_instance = conn->adv_instance;
2735 hci_enable_advertising(hdev);
2736 }
2737
2738 /* Inform sockets conn is gone before we delete it */
2739 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED);
2740
2741 goto done;
2742 }
2743
2744 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
2745
2746 if (conn->type == ACL_LINK) {
2747 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
2748 hci_remove_link_key(hdev, &conn->dst);
2749 }
2750
2751 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
2752 if (params) {
2753 switch (params->auto_connect) {
2754 case HCI_AUTO_CONN_LINK_LOSS:
2755 if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT)
2756 break;
2757 fallthrough;
2758
2759 case HCI_AUTO_CONN_DIRECT:
2760 case HCI_AUTO_CONN_ALWAYS:
2761 hci_pend_le_list_del_init(params);
2762 hci_pend_le_list_add(params, &hdev->pend_le_conns);
2763 break;
2764
2765 default:
2766 break;
2767 }
2768 }
2769
2770 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
2771 cp->reason, mgmt_conn);
2772
2773 hci_disconn_cfm(conn, cp->reason);
2774
2775 done:
2776 /* If the disconnection failed for any reason, the upper layer
2777 * does not retry to disconnect in current implementation.
2778 * Hence, we need to do some basic cleanup here and re-enable
2779 * advertising if necessary.
2780 */
2781 hci_conn_del(conn);
2782 unlock:
2783 hci_dev_unlock(hdev);
2784 }
2785
ev_bdaddr_type(struct hci_dev * hdev,u8 type,bool * resolved)2786 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved)
2787 {
2788 /* When using controller based address resolution, then the new
2789 * address types 0x02 and 0x03 are used. These types need to be
2790 * converted back into either public address or random address type
2791 */
2792 switch (type) {
2793 case ADDR_LE_DEV_PUBLIC_RESOLVED:
2794 if (resolved)
2795 *resolved = true;
2796 return ADDR_LE_DEV_PUBLIC;
2797 case ADDR_LE_DEV_RANDOM_RESOLVED:
2798 if (resolved)
2799 *resolved = true;
2800 return ADDR_LE_DEV_RANDOM;
2801 }
2802
2803 if (resolved)
2804 *resolved = false;
2805 return type;
2806 }
2807
cs_le_create_conn(struct hci_dev * hdev,bdaddr_t * peer_addr,u8 peer_addr_type,u8 own_address_type,u8 filter_policy)2808 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
2809 u8 peer_addr_type, u8 own_address_type,
2810 u8 filter_policy)
2811 {
2812 struct hci_conn *conn;
2813
2814 conn = hci_conn_hash_lookup_le(hdev, peer_addr,
2815 peer_addr_type);
2816 if (!conn)
2817 return;
2818
2819 own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL);
2820
2821 /* Store the initiator and responder address information which
2822 * is needed for SMP. These values will not change during the
2823 * lifetime of the connection.
2824 */
2825 conn->init_addr_type = own_address_type;
2826 if (own_address_type == ADDR_LE_DEV_RANDOM)
2827 bacpy(&conn->init_addr, &hdev->random_addr);
2828 else
2829 bacpy(&conn->init_addr, &hdev->bdaddr);
2830
2831 conn->resp_addr_type = peer_addr_type;
2832 bacpy(&conn->resp_addr, peer_addr);
2833 }
2834
hci_cs_le_create_conn(struct hci_dev * hdev,u8 status)2835 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
2836 {
2837 struct hci_cp_le_create_conn *cp;
2838
2839 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2840
2841 /* All connection failure handling is taken care of by the
2842 * hci_conn_failed function which is triggered by the HCI
2843 * request completion callbacks used for connecting.
2844 */
2845 if (status)
2846 return;
2847
2848 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
2849 if (!cp)
2850 return;
2851
2852 hci_dev_lock(hdev);
2853
2854 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2855 cp->own_address_type, cp->filter_policy);
2856
2857 hci_dev_unlock(hdev);
2858 }
2859
hci_cs_le_ext_create_conn(struct hci_dev * hdev,u8 status)2860 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
2861 {
2862 struct hci_cp_le_ext_create_conn *cp;
2863
2864 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2865
2866 /* All connection failure handling is taken care of by the
2867 * hci_conn_failed function which is triggered by the HCI
2868 * request completion callbacks used for connecting.
2869 */
2870 if (status)
2871 return;
2872
2873 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
2874 if (!cp)
2875 return;
2876
2877 hci_dev_lock(hdev);
2878
2879 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2880 cp->own_addr_type, cp->filter_policy);
2881
2882 hci_dev_unlock(hdev);
2883 }
2884
hci_cs_le_read_remote_features(struct hci_dev * hdev,u8 status)2885 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
2886 {
2887 struct hci_cp_le_read_remote_features *cp;
2888 struct hci_conn *conn;
2889
2890 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2891
2892 if (!status)
2893 return;
2894
2895 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
2896 if (!cp)
2897 return;
2898
2899 hci_dev_lock(hdev);
2900
2901 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2902 if (conn) {
2903 if (conn->state == BT_CONFIG) {
2904 hci_connect_cfm(conn, status);
2905 hci_conn_drop(conn);
2906 }
2907 }
2908
2909 hci_dev_unlock(hdev);
2910 }
2911
hci_cs_le_start_enc(struct hci_dev * hdev,u8 status)2912 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
2913 {
2914 struct hci_cp_le_start_enc *cp;
2915 struct hci_conn *conn;
2916
2917 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2918
2919 if (!status)
2920 return;
2921
2922 hci_dev_lock(hdev);
2923
2924 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
2925 if (!cp)
2926 goto unlock;
2927
2928 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2929 if (!conn)
2930 goto unlock;
2931
2932 if (conn->state != BT_CONNECTED)
2933 goto unlock;
2934
2935 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
2936 hci_conn_drop(conn);
2937
2938 unlock:
2939 hci_dev_unlock(hdev);
2940 }
2941
hci_cs_switch_role(struct hci_dev * hdev,u8 status)2942 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
2943 {
2944 struct hci_cp_switch_role *cp;
2945 struct hci_conn *conn;
2946
2947 BT_DBG("%s status 0x%2.2x", hdev->name, status);
2948
2949 if (!status)
2950 return;
2951
2952 cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
2953 if (!cp)
2954 return;
2955
2956 hci_dev_lock(hdev);
2957
2958 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2959 if (conn)
2960 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
2961
2962 hci_dev_unlock(hdev);
2963 }
2964
hci_inquiry_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)2965 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data,
2966 struct sk_buff *skb)
2967 {
2968 struct hci_ev_status *ev = data;
2969 struct discovery_state *discov = &hdev->discovery;
2970 struct inquiry_entry *e;
2971
2972 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
2973
2974 if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
2975 return;
2976
2977 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
2978 wake_up_bit(&hdev->flags, HCI_INQUIRY);
2979
2980 if (!hci_dev_test_flag(hdev, HCI_MGMT))
2981 return;
2982
2983 hci_dev_lock(hdev);
2984
2985 if (discov->state != DISCOVERY_FINDING)
2986 goto unlock;
2987
2988 if (list_empty(&discov->resolve)) {
2989 /* When BR/EDR inquiry is active and no LE scanning is in
2990 * progress, then change discovery state to indicate completion.
2991 *
2992 * When running LE scanning and BR/EDR inquiry simultaneously
2993 * and the LE scan already finished, then change the discovery
2994 * state to indicate completion.
2995 */
2996 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2997 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
2998 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2999 goto unlock;
3000 }
3001
3002 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
3003 if (e && hci_resolve_name(hdev, e) == 0) {
3004 e->name_state = NAME_PENDING;
3005 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
3006 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION;
3007 } else {
3008 /* When BR/EDR inquiry is active and no LE scanning is in
3009 * progress, then change discovery state to indicate completion.
3010 *
3011 * When running LE scanning and BR/EDR inquiry simultaneously
3012 * and the LE scan already finished, then change the discovery
3013 * state to indicate completion.
3014 */
3015 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
3016 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
3017 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3018 }
3019
3020 unlock:
3021 hci_dev_unlock(hdev);
3022 }
3023
hci_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)3024 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata,
3025 struct sk_buff *skb)
3026 {
3027 struct hci_ev_inquiry_result *ev = edata;
3028 struct inquiry_data data;
3029 int i;
3030
3031 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT,
3032 flex_array_size(ev, info, ev->num)))
3033 return;
3034
3035 bt_dev_dbg(hdev, "num %d", ev->num);
3036
3037 if (!ev->num)
3038 return;
3039
3040 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
3041 return;
3042
3043 hci_dev_lock(hdev);
3044
3045 for (i = 0; i < ev->num; i++) {
3046 struct inquiry_info *info = &ev->info[i];
3047 u32 flags;
3048
3049 bacpy(&data.bdaddr, &info->bdaddr);
3050 data.pscan_rep_mode = info->pscan_rep_mode;
3051 data.pscan_period_mode = info->pscan_period_mode;
3052 data.pscan_mode = info->pscan_mode;
3053 memcpy(data.dev_class, info->dev_class, 3);
3054 data.clock_offset = info->clock_offset;
3055 data.rssi = HCI_RSSI_INVALID;
3056 data.ssp_mode = 0x00;
3057
3058 flags = hci_inquiry_cache_update(hdev, &data, false);
3059
3060 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3061 info->dev_class, HCI_RSSI_INVALID,
3062 flags, NULL, 0, NULL, 0, 0);
3063 }
3064
3065 hci_dev_unlock(hdev);
3066 }
3067
hci_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3068 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
3069 struct sk_buff *skb)
3070 {
3071 struct hci_ev_conn_complete *ev = data;
3072 struct hci_conn *conn;
3073 u8 status = ev->status;
3074
3075 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3076
3077 hci_dev_lock(hdev);
3078
3079 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
3080 if (!conn) {
3081 /* In case of error status and there is no connection pending
3082 * just unlock as there is nothing to cleanup.
3083 */
3084 if (ev->status)
3085 goto unlock;
3086
3087 /* Connection may not exist if auto-connected. Check the bredr
3088 * allowlist to see if this device is allowed to auto connect.
3089 * If link is an ACL type, create a connection class
3090 * automatically.
3091 *
3092 * Auto-connect will only occur if the event filter is
3093 * programmed with a given address. Right now, event filter is
3094 * only used during suspend.
3095 */
3096 if (ev->link_type == ACL_LINK &&
3097 hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
3098 &ev->bdaddr,
3099 BDADDR_BREDR)) {
3100 conn = hci_conn_add_unset(hdev, ev->link_type,
3101 &ev->bdaddr, HCI_ROLE_SLAVE);
3102 if (IS_ERR(conn)) {
3103 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3104 goto unlock;
3105 }
3106 } else {
3107 if (ev->link_type != SCO_LINK)
3108 goto unlock;
3109
3110 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK,
3111 &ev->bdaddr);
3112 if (!conn)
3113 goto unlock;
3114
3115 conn->type = SCO_LINK;
3116 }
3117 }
3118
3119 /* The HCI_Connection_Complete event is only sent once per connection.
3120 * Processing it more than once per connection can corrupt kernel memory.
3121 *
3122 * As the connection handle is set here for the first time, it indicates
3123 * whether the connection is already set up.
3124 */
3125 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
3126 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
3127 goto unlock;
3128 }
3129
3130 if (!status) {
3131 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
3132 if (status)
3133 goto done;
3134
3135 if (conn->type == ACL_LINK) {
3136 conn->state = BT_CONFIG;
3137 hci_conn_hold(conn);
3138
3139 if (!conn->out && !hci_conn_ssp_enabled(conn) &&
3140 !hci_find_link_key(hdev, &ev->bdaddr))
3141 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
3142 else
3143 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3144 } else
3145 conn->state = BT_CONNECTED;
3146
3147 hci_debugfs_create_conn(conn);
3148 hci_conn_add_sysfs(conn);
3149
3150 if (test_bit(HCI_AUTH, &hdev->flags))
3151 set_bit(HCI_CONN_AUTH, &conn->flags);
3152
3153 if (test_bit(HCI_ENCRYPT, &hdev->flags))
3154 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3155
3156 /* "Link key request" completed ahead of "connect request" completes */
3157 if (ev->encr_mode == 1 && !test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3158 ev->link_type == ACL_LINK) {
3159 struct link_key *key;
3160 struct hci_cp_read_enc_key_size cp;
3161
3162 key = hci_find_link_key(hdev, &ev->bdaddr);
3163 if (key) {
3164 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3165
3166 if (!read_key_size_capable(hdev)) {
3167 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3168 } else {
3169 cp.handle = cpu_to_le16(conn->handle);
3170 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3171 sizeof(cp), &cp)) {
3172 bt_dev_err(hdev, "sending read key size failed");
3173 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3174 }
3175 }
3176
3177 hci_encrypt_cfm(conn, ev->status);
3178 }
3179 }
3180
3181 /* Get remote features */
3182 if (conn->type == ACL_LINK) {
3183 struct hci_cp_read_remote_features cp;
3184 cp.handle = ev->handle;
3185 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
3186 sizeof(cp), &cp);
3187
3188 hci_update_scan(hdev);
3189 }
3190
3191 /* Set packet type for incoming connection */
3192 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
3193 struct hci_cp_change_conn_ptype cp;
3194 cp.handle = ev->handle;
3195 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3196 hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
3197 &cp);
3198 }
3199 }
3200
3201 if (conn->type == ACL_LINK)
3202 hci_sco_setup(conn, ev->status);
3203
3204 done:
3205 if (status) {
3206 hci_conn_failed(conn, status);
3207 } else if (ev->link_type == SCO_LINK) {
3208 switch (conn->setting & SCO_AIRMODE_MASK) {
3209 case SCO_AIRMODE_CVSD:
3210 if (hdev->notify)
3211 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
3212 break;
3213 }
3214
3215 hci_connect_cfm(conn, status);
3216 }
3217
3218 unlock:
3219 hci_dev_unlock(hdev);
3220 }
3221
hci_reject_conn(struct hci_dev * hdev,bdaddr_t * bdaddr)3222 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
3223 {
3224 struct hci_cp_reject_conn_req cp;
3225
3226 bacpy(&cp.bdaddr, bdaddr);
3227 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
3228 hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
3229 }
3230
hci_conn_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3231 static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
3232 struct sk_buff *skb)
3233 {
3234 struct hci_ev_conn_request *ev = data;
3235 int mask = hdev->link_mode;
3236 struct inquiry_entry *ie;
3237 struct hci_conn *conn;
3238 __u8 flags = 0;
3239
3240 bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type);
3241
3242 /* Reject incoming connection from device with same BD ADDR against
3243 * CVE-2020-26555
3244 */
3245 if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
3246 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
3247 &ev->bdaddr);
3248 hci_reject_conn(hdev, &ev->bdaddr);
3249 return;
3250 }
3251
3252 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
3253 &flags);
3254
3255 if (!(mask & HCI_LM_ACCEPT)) {
3256 hci_reject_conn(hdev, &ev->bdaddr);
3257 return;
3258 }
3259
3260 hci_dev_lock(hdev);
3261
3262 if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
3263 BDADDR_BREDR)) {
3264 hci_reject_conn(hdev, &ev->bdaddr);
3265 goto unlock;
3266 }
3267
3268 /* Require HCI_CONNECTABLE or an accept list entry to accept the
3269 * connection. These features are only touched through mgmt so
3270 * only do the checks if HCI_MGMT is set.
3271 */
3272 if (hci_dev_test_flag(hdev, HCI_MGMT) &&
3273 !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
3274 !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
3275 BDADDR_BREDR)) {
3276 hci_reject_conn(hdev, &ev->bdaddr);
3277 goto unlock;
3278 }
3279
3280 /* Connection accepted */
3281
3282 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3283 if (ie)
3284 memcpy(ie->data.dev_class, ev->dev_class, 3);
3285
3286 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
3287 &ev->bdaddr);
3288 if (!conn) {
3289 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr,
3290 HCI_ROLE_SLAVE);
3291 if (IS_ERR(conn)) {
3292 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3293 goto unlock;
3294 }
3295 }
3296
3297 memcpy(conn->dev_class, ev->dev_class, 3);
3298
3299 hci_dev_unlock(hdev);
3300
3301 if (ev->link_type == ACL_LINK ||
3302 (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
3303 struct hci_cp_accept_conn_req cp;
3304 conn->state = BT_CONNECT;
3305
3306 bacpy(&cp.bdaddr, &ev->bdaddr);
3307
3308 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
3309 cp.role = 0x00; /* Become central */
3310 else
3311 cp.role = 0x01; /* Remain peripheral */
3312
3313 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
3314 } else if (!(flags & HCI_PROTO_DEFER)) {
3315 struct hci_cp_accept_sync_conn_req cp;
3316 conn->state = BT_CONNECT;
3317
3318 bacpy(&cp.bdaddr, &ev->bdaddr);
3319 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3320
3321 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
3322 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
3323 cp.max_latency = cpu_to_le16(0xffff);
3324 cp.content_format = cpu_to_le16(hdev->voice_setting);
3325 cp.retrans_effort = 0xff;
3326
3327 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
3328 &cp);
3329 } else {
3330 conn->state = BT_CONNECT2;
3331 hci_connect_cfm(conn, 0);
3332 }
3333
3334 return;
3335 unlock:
3336 hci_dev_unlock(hdev);
3337 }
3338
hci_to_mgmt_reason(u8 err)3339 static u8 hci_to_mgmt_reason(u8 err)
3340 {
3341 switch (err) {
3342 case HCI_ERROR_CONNECTION_TIMEOUT:
3343 return MGMT_DEV_DISCONN_TIMEOUT;
3344 case HCI_ERROR_REMOTE_USER_TERM:
3345 case HCI_ERROR_REMOTE_LOW_RESOURCES:
3346 case HCI_ERROR_REMOTE_POWER_OFF:
3347 return MGMT_DEV_DISCONN_REMOTE;
3348 case HCI_ERROR_LOCAL_HOST_TERM:
3349 return MGMT_DEV_DISCONN_LOCAL_HOST;
3350 default:
3351 return MGMT_DEV_DISCONN_UNKNOWN;
3352 }
3353 }
3354
hci_disconn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3355 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
3356 struct sk_buff *skb)
3357 {
3358 struct hci_ev_disconn_complete *ev = data;
3359 u8 reason;
3360 struct hci_conn_params *params;
3361 struct hci_conn *conn;
3362 bool mgmt_connected;
3363
3364 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3365
3366 hci_dev_lock(hdev);
3367
3368 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3369 if (!conn)
3370 goto unlock;
3371
3372 if (ev->status) {
3373 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
3374 conn->dst_type, ev->status);
3375 goto unlock;
3376 }
3377
3378 conn->state = BT_CLOSED;
3379
3380 mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
3381
3382 if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
3383 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
3384 else
3385 reason = hci_to_mgmt_reason(ev->reason);
3386
3387 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
3388 reason, mgmt_connected);
3389
3390 if (conn->type == ACL_LINK) {
3391 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
3392 hci_remove_link_key(hdev, &conn->dst);
3393
3394 hci_update_scan(hdev);
3395 }
3396
3397 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
3398 if (params) {
3399 switch (params->auto_connect) {
3400 case HCI_AUTO_CONN_LINK_LOSS:
3401 if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
3402 break;
3403 fallthrough;
3404
3405 case HCI_AUTO_CONN_DIRECT:
3406 case HCI_AUTO_CONN_ALWAYS:
3407 hci_pend_le_list_del_init(params);
3408 hci_pend_le_list_add(params, &hdev->pend_le_conns);
3409 hci_update_passive_scan(hdev);
3410 break;
3411
3412 default:
3413 break;
3414 }
3415 }
3416
3417 hci_disconn_cfm(conn, ev->reason);
3418
3419 /* Re-enable advertising if necessary, since it might
3420 * have been disabled by the connection. From the
3421 * HCI_LE_Set_Advertise_Enable command description in
3422 * the core specification (v4.0):
3423 * "The Controller shall continue advertising until the Host
3424 * issues an LE_Set_Advertise_Enable command with
3425 * Advertising_Enable set to 0x00 (Advertising is disabled)
3426 * or until a connection is created or until the Advertising
3427 * is timed out due to Directed Advertising."
3428 */
3429 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
3430 hdev->cur_adv_instance = conn->adv_instance;
3431 hci_enable_advertising(hdev);
3432 }
3433
3434 hci_conn_del(conn);
3435
3436 unlock:
3437 hci_dev_unlock(hdev);
3438 }
3439
hci_auth_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3440 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data,
3441 struct sk_buff *skb)
3442 {
3443 struct hci_ev_auth_complete *ev = data;
3444 struct hci_conn *conn;
3445
3446 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3447
3448 hci_dev_lock(hdev);
3449
3450 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3451 if (!conn)
3452 goto unlock;
3453
3454 if (!ev->status) {
3455 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3456 set_bit(HCI_CONN_AUTH, &conn->flags);
3457 conn->sec_level = conn->pending_sec_level;
3458 } else {
3459 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3460 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3461
3462 mgmt_auth_failed(conn, ev->status);
3463 }
3464
3465 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3466
3467 if (conn->state == BT_CONFIG) {
3468 if (!ev->status && hci_conn_ssp_enabled(conn)) {
3469 struct hci_cp_set_conn_encrypt cp;
3470 cp.handle = ev->handle;
3471 cp.encrypt = 0x01;
3472 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3473 &cp);
3474 } else {
3475 conn->state = BT_CONNECTED;
3476 hci_connect_cfm(conn, ev->status);
3477 hci_conn_drop(conn);
3478 }
3479 } else {
3480 hci_auth_cfm(conn, ev->status);
3481
3482 hci_conn_hold(conn);
3483 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3484 hci_conn_drop(conn);
3485 }
3486
3487 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
3488 if (!ev->status) {
3489 struct hci_cp_set_conn_encrypt cp;
3490 cp.handle = ev->handle;
3491 cp.encrypt = 0x01;
3492 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3493 &cp);
3494 } else {
3495 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3496 hci_encrypt_cfm(conn, ev->status);
3497 }
3498 }
3499
3500 unlock:
3501 hci_dev_unlock(hdev);
3502 }
3503
hci_remote_name_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3504 static void hci_remote_name_evt(struct hci_dev *hdev, void *data,
3505 struct sk_buff *skb)
3506 {
3507 struct hci_ev_remote_name *ev = data;
3508 struct hci_conn *conn;
3509
3510 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3511
3512 hci_dev_lock(hdev);
3513
3514 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3515
3516 if (!hci_dev_test_flag(hdev, HCI_MGMT))
3517 goto check_auth;
3518
3519 if (ev->status == 0)
3520 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
3521 strnlen(ev->name, HCI_MAX_NAME_LENGTH));
3522 else
3523 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
3524
3525 check_auth:
3526 if (!conn)
3527 goto unlock;
3528
3529 if (!hci_outgoing_auth_needed(hdev, conn))
3530 goto unlock;
3531
3532 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
3533 struct hci_cp_auth_requested cp;
3534
3535 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
3536
3537 cp.handle = __cpu_to_le16(conn->handle);
3538 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
3539 }
3540
3541 unlock:
3542 hci_dev_unlock(hdev);
3543 }
3544
hci_encrypt_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3545 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data,
3546 struct sk_buff *skb)
3547 {
3548 struct hci_ev_encrypt_change *ev = data;
3549 struct hci_conn *conn;
3550
3551 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3552
3553 hci_dev_lock(hdev);
3554
3555 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3556 if (!conn)
3557 goto unlock;
3558
3559 if (!ev->status) {
3560 if (ev->encrypt) {
3561 /* Encryption implies authentication */
3562 set_bit(HCI_CONN_AUTH, &conn->flags);
3563 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3564 conn->sec_level = conn->pending_sec_level;
3565
3566 /* P-256 authentication key implies FIPS */
3567 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
3568 set_bit(HCI_CONN_FIPS, &conn->flags);
3569
3570 if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
3571 conn->type == LE_LINK)
3572 set_bit(HCI_CONN_AES_CCM, &conn->flags);
3573 } else {
3574 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
3575 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
3576 }
3577 }
3578
3579 /* We should disregard the current RPA and generate a new one
3580 * whenever the encryption procedure fails.
3581 */
3582 if (ev->status && conn->type == LE_LINK) {
3583 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
3584 hci_adv_instances_set_rpa_expired(hdev, true);
3585 }
3586
3587 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3588
3589 /* Check link security requirements are met */
3590 if (!hci_conn_check_link_mode(conn))
3591 ev->status = HCI_ERROR_AUTH_FAILURE;
3592
3593 if (ev->status && conn->state == BT_CONNECTED) {
3594 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3595 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3596
3597 /* Notify upper layers so they can cleanup before
3598 * disconnecting.
3599 */
3600 hci_encrypt_cfm(conn, ev->status);
3601 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
3602 hci_conn_drop(conn);
3603 goto unlock;
3604 }
3605
3606 /* Try reading the encryption key size for encrypted ACL links */
3607 if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
3608 struct hci_cp_read_enc_key_size cp;
3609
3610 /* Only send HCI_Read_Encryption_Key_Size if the
3611 * controller really supports it. If it doesn't, assume
3612 * the default size (16).
3613 */
3614 if (!read_key_size_capable(hdev)) {
3615 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3616 goto notify;
3617 }
3618
3619 cp.handle = cpu_to_le16(conn->handle);
3620 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3621 sizeof(cp), &cp)) {
3622 bt_dev_err(hdev, "sending read key size failed");
3623 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3624 goto notify;
3625 }
3626
3627 goto unlock;
3628 }
3629
3630 /* Set the default Authenticated Payload Timeout after
3631 * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
3632 * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
3633 * sent when the link is active and Encryption is enabled, the conn
3634 * type can be either LE or ACL and controller must support LMP Ping.
3635 * Ensure for AES-CCM encryption as well.
3636 */
3637 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3638 test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
3639 ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
3640 (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
3641 struct hci_cp_write_auth_payload_to cp;
3642
3643 cp.handle = cpu_to_le16(conn->handle);
3644 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
3645 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
3646 sizeof(cp), &cp))
3647 bt_dev_err(hdev, "write auth payload timeout failed");
3648 }
3649
3650 notify:
3651 hci_encrypt_cfm(conn, ev->status);
3652
3653 unlock:
3654 hci_dev_unlock(hdev);
3655 }
3656
hci_change_link_key_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3657 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data,
3658 struct sk_buff *skb)
3659 {
3660 struct hci_ev_change_link_key_complete *ev = data;
3661 struct hci_conn *conn;
3662
3663 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3664
3665 hci_dev_lock(hdev);
3666
3667 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3668 if (conn) {
3669 if (!ev->status)
3670 set_bit(HCI_CONN_SECURE, &conn->flags);
3671
3672 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3673
3674 hci_key_change_cfm(conn, ev->status);
3675 }
3676
3677 hci_dev_unlock(hdev);
3678 }
3679
hci_remote_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3680 static void hci_remote_features_evt(struct hci_dev *hdev, void *data,
3681 struct sk_buff *skb)
3682 {
3683 struct hci_ev_remote_features *ev = data;
3684 struct hci_conn *conn;
3685
3686 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3687
3688 hci_dev_lock(hdev);
3689
3690 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3691 if (!conn)
3692 goto unlock;
3693
3694 if (!ev->status)
3695 memcpy(conn->features[0], ev->features, 8);
3696
3697 if (conn->state != BT_CONFIG)
3698 goto unlock;
3699
3700 if (!ev->status && lmp_ext_feat_capable(hdev) &&
3701 lmp_ext_feat_capable(conn)) {
3702 struct hci_cp_read_remote_ext_features cp;
3703 cp.handle = ev->handle;
3704 cp.page = 0x01;
3705 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
3706 sizeof(cp), &cp);
3707 goto unlock;
3708 }
3709
3710 if (!ev->status) {
3711 struct hci_cp_remote_name_req cp;
3712 memset(&cp, 0, sizeof(cp));
3713 bacpy(&cp.bdaddr, &conn->dst);
3714 cp.pscan_rep_mode = 0x02;
3715 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
3716 } else {
3717 mgmt_device_connected(hdev, conn, NULL, 0);
3718 }
3719
3720 if (!hci_outgoing_auth_needed(hdev, conn)) {
3721 conn->state = BT_CONNECTED;
3722 hci_connect_cfm(conn, ev->status);
3723 hci_conn_drop(conn);
3724 }
3725
3726 unlock:
3727 hci_dev_unlock(hdev);
3728 }
3729
handle_cmd_cnt_and_timer(struct hci_dev * hdev,u8 ncmd)3730 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd)
3731 {
3732 cancel_delayed_work(&hdev->cmd_timer);
3733
3734 rcu_read_lock();
3735 if (!test_bit(HCI_RESET, &hdev->flags)) {
3736 if (ncmd) {
3737 cancel_delayed_work(&hdev->ncmd_timer);
3738 atomic_set(&hdev->cmd_cnt, 1);
3739 } else {
3740 if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
3741 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer,
3742 HCI_NCMD_TIMEOUT);
3743 }
3744 }
3745 rcu_read_unlock();
3746 }
3747
hci_cc_le_read_buffer_size_v2(struct hci_dev * hdev,void * data,struct sk_buff * skb)3748 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data,
3749 struct sk_buff *skb)
3750 {
3751 struct hci_rp_le_read_buffer_size_v2 *rp = data;
3752
3753 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3754
3755 if (rp->status)
3756 return rp->status;
3757
3758 hdev->le_mtu = __le16_to_cpu(rp->acl_mtu);
3759 hdev->le_pkts = rp->acl_max_pkt;
3760 hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu);
3761 hdev->iso_pkts = rp->iso_max_pkt;
3762
3763 hdev->le_cnt = hdev->le_pkts;
3764 hdev->iso_cnt = hdev->iso_pkts;
3765
3766 BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
3767 hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
3768
3769 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
3770 return HCI_ERROR_INVALID_PARAMETERS;
3771
3772 return rp->status;
3773 }
3774
hci_unbound_cis_failed(struct hci_dev * hdev,u8 cig,u8 status)3775 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status)
3776 {
3777 struct hci_conn *conn, *tmp;
3778
3779 lockdep_assert_held(&hdev->lock);
3780
3781 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
3782 if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY) ||
3783 conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig)
3784 continue;
3785
3786 if (HCI_CONN_HANDLE_UNSET(conn->handle))
3787 hci_conn_failed(conn, status);
3788 }
3789 }
3790
hci_cc_le_set_cig_params(struct hci_dev * hdev,void * data,struct sk_buff * skb)3791 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
3792 struct sk_buff *skb)
3793 {
3794 struct hci_rp_le_set_cig_params *rp = data;
3795 struct hci_cp_le_set_cig_params *cp;
3796 struct hci_conn *conn;
3797 u8 status = rp->status;
3798 bool pending = false;
3799 int i;
3800
3801 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3802
3803 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
3804 if (!rp->status && (!cp || rp->num_handles != cp->num_cis ||
3805 rp->cig_id != cp->cig_id)) {
3806 bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
3807 status = HCI_ERROR_UNSPECIFIED;
3808 }
3809
3810 hci_dev_lock(hdev);
3811
3812 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554
3813 *
3814 * If the Status return parameter is non-zero, then the state of the CIG
3815 * and its CIS configurations shall not be changed by the command. If
3816 * the CIG did not already exist, it shall not be created.
3817 */
3818 if (status) {
3819 /* Keep current configuration, fail only the unbound CIS */
3820 hci_unbound_cis_failed(hdev, rp->cig_id, status);
3821 goto unlock;
3822 }
3823
3824 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
3825 *
3826 * If the Status return parameter is zero, then the Controller shall
3827 * set the Connection_Handle arrayed return parameter to the connection
3828 * handle(s) corresponding to the CIS configurations specified in
3829 * the CIS_IDs command parameter, in the same order.
3830 */
3831 for (i = 0; i < rp->num_handles; ++i) {
3832 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
3833 cp->cis[i].cis_id);
3834 if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
3835 continue;
3836
3837 if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
3838 continue;
3839
3840 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i])))
3841 continue;
3842
3843 if (conn->state == BT_CONNECT)
3844 pending = true;
3845 }
3846
3847 unlock:
3848 if (pending)
3849 hci_le_create_cis_pending(hdev);
3850
3851 hci_dev_unlock(hdev);
3852
3853 return rp->status;
3854 }
3855
hci_cc_le_setup_iso_path(struct hci_dev * hdev,void * data,struct sk_buff * skb)3856 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data,
3857 struct sk_buff *skb)
3858 {
3859 struct hci_rp_le_setup_iso_path *rp = data;
3860 struct hci_cp_le_setup_iso_path *cp;
3861 struct hci_conn *conn;
3862
3863 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3864
3865 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH);
3866 if (!cp)
3867 return rp->status;
3868
3869 hci_dev_lock(hdev);
3870
3871 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
3872 if (!conn)
3873 goto unlock;
3874
3875 if (rp->status) {
3876 hci_connect_cfm(conn, rp->status);
3877 hci_conn_del(conn);
3878 goto unlock;
3879 }
3880
3881 switch (cp->direction) {
3882 /* Input (Host to Controller) */
3883 case 0x00:
3884 /* Only confirm connection if output only */
3885 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu)
3886 hci_connect_cfm(conn, rp->status);
3887 break;
3888 /* Output (Controller to Host) */
3889 case 0x01:
3890 /* Confirm connection since conn->iso_qos is always configured
3891 * last.
3892 */
3893 hci_connect_cfm(conn, rp->status);
3894
3895 /* Notify device connected in case it is a BIG Sync */
3896 if (!rp->status && test_bit(HCI_CONN_BIG_SYNC, &conn->flags))
3897 mgmt_device_connected(hdev, conn, NULL, 0);
3898
3899 break;
3900 }
3901
3902 unlock:
3903 hci_dev_unlock(hdev);
3904 return rp->status;
3905 }
3906
hci_cs_le_create_big(struct hci_dev * hdev,u8 status)3907 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status)
3908 {
3909 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3910 }
3911
hci_cc_set_per_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)3912 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data,
3913 struct sk_buff *skb)
3914 {
3915 struct hci_ev_status *rp = data;
3916 struct hci_cp_le_set_per_adv_params *cp;
3917
3918 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3919
3920 if (rp->status)
3921 return rp->status;
3922
3923 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS);
3924 if (!cp)
3925 return rp->status;
3926
3927 /* TODO: set the conn state */
3928 return rp->status;
3929 }
3930
hci_cc_le_set_per_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)3931 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data,
3932 struct sk_buff *skb)
3933 {
3934 struct hci_ev_status *rp = data;
3935 struct hci_cp_le_set_per_adv_enable *cp;
3936 struct adv_info *adv = NULL, *n;
3937 u8 per_adv_cnt = 0;
3938
3939 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3940
3941 if (rp->status)
3942 return rp->status;
3943
3944 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE);
3945 if (!cp)
3946 return rp->status;
3947
3948 hci_dev_lock(hdev);
3949
3950 adv = hci_find_adv_instance(hdev, cp->handle);
3951
3952 if (cp->enable) {
3953 hci_dev_set_flag(hdev, HCI_LE_PER_ADV);
3954
3955 if (adv)
3956 adv->enabled = true;
3957 } else {
3958 /* If just one instance was disabled check if there are
3959 * any other instance enabled before clearing HCI_LE_PER_ADV.
3960 * The current periodic adv instance will be marked as
3961 * disabled once extended advertising is also disabled.
3962 */
3963 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
3964 list) {
3965 if (adv->periodic && adv->enabled)
3966 per_adv_cnt++;
3967 }
3968
3969 if (per_adv_cnt > 1)
3970 goto unlock;
3971
3972 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV);
3973 }
3974
3975 unlock:
3976 hci_dev_unlock(hdev);
3977
3978 return rp->status;
3979 }
3980
3981 #define HCI_CC_VL(_op, _func, _min, _max) \
3982 { \
3983 .op = _op, \
3984 .func = _func, \
3985 .min_len = _min, \
3986 .max_len = _max, \
3987 }
3988
3989 #define HCI_CC(_op, _func, _len) \
3990 HCI_CC_VL(_op, _func, _len, _len)
3991
3992 #define HCI_CC_STATUS(_op, _func) \
3993 HCI_CC(_op, _func, sizeof(struct hci_ev_status))
3994
3995 static const struct hci_cc {
3996 u16 op;
3997 u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
3998 u16 min_len;
3999 u16 max_len;
4000 } hci_cc_table[] = {
4001 HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel),
4002 HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq),
4003 HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq),
4004 HCI_CC_STATUS(HCI_OP_REMOTE_NAME_REQ_CANCEL,
4005 hci_cc_remote_name_req_cancel),
4006 HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery,
4007 sizeof(struct hci_rp_role_discovery)),
4008 HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy,
4009 sizeof(struct hci_rp_read_link_policy)),
4010 HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy,
4011 sizeof(struct hci_rp_write_link_policy)),
4012 HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy,
4013 sizeof(struct hci_rp_read_def_link_policy)),
4014 HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY,
4015 hci_cc_write_def_link_policy),
4016 HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset),
4017 HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key,
4018 sizeof(struct hci_rp_read_stored_link_key)),
4019 HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key,
4020 sizeof(struct hci_rp_delete_stored_link_key)),
4021 HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name),
4022 HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name,
4023 sizeof(struct hci_rp_read_local_name)),
4024 HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable),
4025 HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
4026 HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable),
4027 HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter),
4028 HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev,
4029 sizeof(struct hci_rp_read_class_of_dev)),
4030 HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev),
4031 HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting,
4032 sizeof(struct hci_rp_read_voice_setting)),
4033 HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting),
4034 HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac,
4035 sizeof(struct hci_rp_read_num_supported_iac)),
4036 HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode),
4037 HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support),
4038 HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout,
4039 sizeof(struct hci_rp_read_auth_payload_to)),
4040 HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout,
4041 sizeof(struct hci_rp_write_auth_payload_to)),
4042 HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version,
4043 sizeof(struct hci_rp_read_local_version)),
4044 HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands,
4045 sizeof(struct hci_rp_read_local_commands)),
4046 HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features,
4047 sizeof(struct hci_rp_read_local_features)),
4048 HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features,
4049 sizeof(struct hci_rp_read_local_ext_features)),
4050 HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size,
4051 sizeof(struct hci_rp_read_buffer_size)),
4052 HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr,
4053 sizeof(struct hci_rp_read_bd_addr)),
4054 HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts,
4055 sizeof(struct hci_rp_read_local_pairing_opts)),
4056 HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity,
4057 sizeof(struct hci_rp_read_page_scan_activity)),
4058 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
4059 hci_cc_write_page_scan_activity),
4060 HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type,
4061 sizeof(struct hci_rp_read_page_scan_type)),
4062 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type),
4063 HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock,
4064 sizeof(struct hci_rp_read_clock)),
4065 HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size,
4066 sizeof(struct hci_rp_read_enc_key_size)),
4067 HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power,
4068 sizeof(struct hci_rp_read_inq_rsp_tx_power)),
4069 HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4070 hci_cc_read_def_err_data_reporting,
4071 sizeof(struct hci_rp_read_def_err_data_reporting)),
4072 HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4073 hci_cc_write_def_err_data_reporting),
4074 HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply,
4075 sizeof(struct hci_rp_pin_code_reply)),
4076 HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply,
4077 sizeof(struct hci_rp_pin_code_neg_reply)),
4078 HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data,
4079 sizeof(struct hci_rp_read_local_oob_data)),
4080 HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data,
4081 sizeof(struct hci_rp_read_local_oob_ext_data)),
4082 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size,
4083 sizeof(struct hci_rp_le_read_buffer_size)),
4084 HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features,
4085 sizeof(struct hci_rp_le_read_local_features)),
4086 HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power,
4087 sizeof(struct hci_rp_le_read_adv_tx_power)),
4088 HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply,
4089 sizeof(struct hci_rp_user_confirm_reply)),
4090 HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply,
4091 sizeof(struct hci_rp_user_confirm_reply)),
4092 HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply,
4093 sizeof(struct hci_rp_user_confirm_reply)),
4094 HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply,
4095 sizeof(struct hci_rp_user_confirm_reply)),
4096 HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr),
4097 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable),
4098 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param),
4099 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable),
4100 HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4101 hci_cc_le_read_accept_list_size,
4102 sizeof(struct hci_rp_le_read_accept_list_size)),
4103 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list),
4104 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST,
4105 hci_cc_le_add_to_accept_list),
4106 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
4107 hci_cc_le_del_from_accept_list),
4108 HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states,
4109 sizeof(struct hci_rp_le_read_supported_states)),
4110 HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len,
4111 sizeof(struct hci_rp_le_read_def_data_len)),
4112 HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN,
4113 hci_cc_le_write_def_data_len),
4114 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST,
4115 hci_cc_le_add_to_resolv_list),
4116 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST,
4117 hci_cc_le_del_from_resolv_list),
4118 HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST,
4119 hci_cc_le_clear_resolv_list),
4120 HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size,
4121 sizeof(struct hci_rp_le_read_resolv_list_size)),
4122 HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
4123 hci_cc_le_set_addr_resolution_enable),
4124 HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len,
4125 sizeof(struct hci_rp_le_read_max_data_len)),
4126 HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED,
4127 hci_cc_write_le_host_supported),
4128 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param),
4129 HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi,
4130 sizeof(struct hci_rp_read_rssi)),
4131 HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power,
4132 sizeof(struct hci_rp_read_tx_power)),
4133 HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode),
4134 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS,
4135 hci_cc_le_set_ext_scan_param),
4136 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE,
4137 hci_cc_le_set_ext_scan_enable),
4138 HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy),
4139 HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4140 hci_cc_le_read_num_adv_sets,
4141 sizeof(struct hci_rp_le_read_num_supported_adv_sets)),
4142 HCI_CC(HCI_OP_LE_SET_EXT_ADV_PARAMS, hci_cc_set_ext_adv_param,
4143 sizeof(struct hci_rp_le_set_ext_adv_params)),
4144 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE,
4145 hci_cc_le_set_ext_adv_enable),
4146 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
4147 hci_cc_le_set_adv_set_random_addr),
4148 HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set),
4149 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets),
4150 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param),
4151 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE,
4152 hci_cc_le_set_per_adv_enable),
4153 HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power,
4154 sizeof(struct hci_rp_le_read_transmit_power)),
4155 HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode),
4156 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2,
4157 sizeof(struct hci_rp_le_read_buffer_size_v2)),
4158 HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params,
4159 sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE),
4160 HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path,
4161 sizeof(struct hci_rp_le_setup_iso_path)),
4162 };
4163
hci_cc_func(struct hci_dev * hdev,const struct hci_cc * cc,struct sk_buff * skb)4164 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc,
4165 struct sk_buff *skb)
4166 {
4167 void *data;
4168
4169 if (skb->len < cc->min_len) {
4170 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u",
4171 cc->op, skb->len, cc->min_len);
4172 return HCI_ERROR_UNSPECIFIED;
4173 }
4174
4175 /* Just warn if the length is over max_len size it still be possible to
4176 * partially parse the cc so leave to callback to decide if that is
4177 * acceptable.
4178 */
4179 if (skb->len > cc->max_len)
4180 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u",
4181 cc->op, skb->len, cc->max_len);
4182
4183 data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len);
4184 if (!data)
4185 return HCI_ERROR_UNSPECIFIED;
4186
4187 return cc->func(hdev, data, skb);
4188 }
4189
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)4190 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
4191 struct sk_buff *skb, u16 *opcode, u8 *status,
4192 hci_req_complete_t *req_complete,
4193 hci_req_complete_skb_t *req_complete_skb)
4194 {
4195 struct hci_ev_cmd_complete *ev = data;
4196 int i;
4197
4198 *opcode = __le16_to_cpu(ev->opcode);
4199
4200 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4201
4202 for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) {
4203 if (hci_cc_table[i].op == *opcode) {
4204 *status = hci_cc_func(hdev, &hci_cc_table[i], skb);
4205 break;
4206 }
4207 }
4208
4209 if (i == ARRAY_SIZE(hci_cc_table)) {
4210 /* Unknown opcode, assume byte 0 contains the status, so
4211 * that e.g. __hci_cmd_sync() properly returns errors
4212 * for vendor specific commands send by HCI drivers.
4213 * If a vendor doesn't actually follow this convention we may
4214 * need to introduce a vendor CC table in order to properly set
4215 * the status.
4216 */
4217 *status = skb->data[0];
4218 }
4219
4220 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4221
4222 hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
4223 req_complete_skb);
4224
4225 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4226 bt_dev_err(hdev,
4227 "unexpected event for opcode 0x%4.4x", *opcode);
4228 return;
4229 }
4230
4231 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4232 queue_work(hdev->workqueue, &hdev->cmd_work);
4233 }
4234
hci_cs_le_create_cis(struct hci_dev * hdev,u8 status)4235 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
4236 {
4237 struct hci_cp_le_create_cis *cp;
4238 bool pending = false;
4239 int i;
4240
4241 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4242
4243 if (!status)
4244 return;
4245
4246 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
4247 if (!cp)
4248 return;
4249
4250 hci_dev_lock(hdev);
4251
4252 /* Remove connection if command failed */
4253 for (i = 0; cp->num_cis; cp->num_cis--, i++) {
4254 struct hci_conn *conn;
4255 u16 handle;
4256
4257 handle = __le16_to_cpu(cp->cis[i].cis_handle);
4258
4259 conn = hci_conn_hash_lookup_handle(hdev, handle);
4260 if (conn) {
4261 if (test_and_clear_bit(HCI_CONN_CREATE_CIS,
4262 &conn->flags))
4263 pending = true;
4264 conn->state = BT_CLOSED;
4265 hci_connect_cfm(conn, status);
4266 hci_conn_del(conn);
4267 }
4268 }
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; use JUST_CFM method */
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 initiator of request authorization and the
5332 * local IO capability is not NoInputNoOutput, use JUST_WORKS
5333 * method (mgmt_user_confirm with confirm_hint set to 1).
5334 */
5335 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5336 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) {
5337 bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5338 confirm_hint = 1;
5339 goto confirm;
5340 }
5341
5342 /* If there already exists link key in local host, leave the
5343 * decision to user space since the remote device could be
5344 * legitimate or malicious.
5345 */
5346 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5347 bt_dev_dbg(hdev, "Local host already has link key");
5348 confirm_hint = 1;
5349 goto confirm;
5350 }
5351
5352 BT_DBG("Auto-accept of user confirmation with %ums delay",
5353 hdev->auto_accept_delay);
5354
5355 if (hdev->auto_accept_delay > 0) {
5356 int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5357 queue_delayed_work(conn->hdev->workqueue,
5358 &conn->auto_accept_work, delay);
5359 goto unlock;
5360 }
5361
5362 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5363 sizeof(ev->bdaddr), &ev->bdaddr);
5364 goto unlock;
5365 }
5366
5367 confirm:
5368 mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5369 le32_to_cpu(ev->passkey), confirm_hint);
5370
5371 unlock:
5372 hci_dev_unlock(hdev);
5373 }
5374
hci_user_passkey_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5375 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5376 struct sk_buff *skb)
5377 {
5378 struct hci_ev_user_passkey_req *ev = data;
5379
5380 bt_dev_dbg(hdev, "");
5381
5382 if (hci_dev_test_flag(hdev, HCI_MGMT))
5383 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5384 }
5385
hci_user_passkey_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5386 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5387 struct sk_buff *skb)
5388 {
5389 struct hci_ev_user_passkey_notify *ev = data;
5390 struct hci_conn *conn;
5391
5392 bt_dev_dbg(hdev, "");
5393
5394 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5395 if (!conn)
5396 return;
5397
5398 conn->passkey_notify = __le32_to_cpu(ev->passkey);
5399 conn->passkey_entered = 0;
5400
5401 if (hci_dev_test_flag(hdev, HCI_MGMT))
5402 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5403 conn->dst_type, conn->passkey_notify,
5404 conn->passkey_entered);
5405 }
5406
hci_keypress_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5407 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5408 struct sk_buff *skb)
5409 {
5410 struct hci_ev_keypress_notify *ev = data;
5411 struct hci_conn *conn;
5412
5413 bt_dev_dbg(hdev, "");
5414
5415 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5416 if (!conn)
5417 return;
5418
5419 switch (ev->type) {
5420 case HCI_KEYPRESS_STARTED:
5421 conn->passkey_entered = 0;
5422 return;
5423
5424 case HCI_KEYPRESS_ENTERED:
5425 conn->passkey_entered++;
5426 break;
5427
5428 case HCI_KEYPRESS_ERASED:
5429 conn->passkey_entered--;
5430 break;
5431
5432 case HCI_KEYPRESS_CLEARED:
5433 conn->passkey_entered = 0;
5434 break;
5435
5436 case HCI_KEYPRESS_COMPLETED:
5437 return;
5438 }
5439
5440 if (hci_dev_test_flag(hdev, HCI_MGMT))
5441 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5442 conn->dst_type, conn->passkey_notify,
5443 conn->passkey_entered);
5444 }
5445
hci_simple_pair_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5446 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5447 struct sk_buff *skb)
5448 {
5449 struct hci_ev_simple_pair_complete *ev = data;
5450 struct hci_conn *conn;
5451
5452 bt_dev_dbg(hdev, "");
5453
5454 hci_dev_lock(hdev);
5455
5456 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5457 if (!conn || !hci_conn_ssp_enabled(conn))
5458 goto unlock;
5459
5460 /* Reset the authentication requirement to unknown */
5461 conn->remote_auth = 0xff;
5462
5463 /* To avoid duplicate auth_failed events to user space we check
5464 * the HCI_CONN_AUTH_PEND flag which will be set if we
5465 * initiated the authentication. A traditional auth_complete
5466 * event gets always produced as initiator and is also mapped to
5467 * the mgmt_auth_failed event */
5468 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5469 mgmt_auth_failed(conn, ev->status);
5470
5471 hci_conn_drop(conn);
5472
5473 unlock:
5474 hci_dev_unlock(hdev);
5475 }
5476
hci_remote_host_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5477 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5478 struct sk_buff *skb)
5479 {
5480 struct hci_ev_remote_host_features *ev = data;
5481 struct inquiry_entry *ie;
5482 struct hci_conn *conn;
5483
5484 bt_dev_dbg(hdev, "");
5485
5486 hci_dev_lock(hdev);
5487
5488 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5489 if (conn)
5490 memcpy(conn->features[1], ev->features, 8);
5491
5492 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5493 if (ie)
5494 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5495
5496 hci_dev_unlock(hdev);
5497 }
5498
hci_remote_oob_data_request_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5499 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5500 struct sk_buff *skb)
5501 {
5502 struct hci_ev_remote_oob_data_request *ev = edata;
5503 struct oob_data *data;
5504
5505 bt_dev_dbg(hdev, "");
5506
5507 hci_dev_lock(hdev);
5508
5509 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5510 goto unlock;
5511
5512 data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5513 if (!data) {
5514 struct hci_cp_remote_oob_data_neg_reply cp;
5515
5516 bacpy(&cp.bdaddr, &ev->bdaddr);
5517 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5518 sizeof(cp), &cp);
5519 goto unlock;
5520 }
5521
5522 if (bredr_sc_enabled(hdev)) {
5523 struct hci_cp_remote_oob_ext_data_reply cp;
5524
5525 bacpy(&cp.bdaddr, &ev->bdaddr);
5526 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5527 memset(cp.hash192, 0, sizeof(cp.hash192));
5528 memset(cp.rand192, 0, sizeof(cp.rand192));
5529 } else {
5530 memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5531 memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5532 }
5533 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5534 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5535
5536 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5537 sizeof(cp), &cp);
5538 } else {
5539 struct hci_cp_remote_oob_data_reply cp;
5540
5541 bacpy(&cp.bdaddr, &ev->bdaddr);
5542 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5543 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5544
5545 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5546 sizeof(cp), &cp);
5547 }
5548
5549 unlock:
5550 hci_dev_unlock(hdev);
5551 }
5552
le_conn_update_addr(struct hci_conn * conn,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * local_rpa)5553 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5554 u8 bdaddr_type, bdaddr_t *local_rpa)
5555 {
5556 if (conn->out) {
5557 conn->dst_type = bdaddr_type;
5558 conn->resp_addr_type = bdaddr_type;
5559 bacpy(&conn->resp_addr, bdaddr);
5560
5561 /* Check if the controller has set a Local RPA then it must be
5562 * used instead or hdev->rpa.
5563 */
5564 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5565 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5566 bacpy(&conn->init_addr, local_rpa);
5567 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5568 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5569 bacpy(&conn->init_addr, &conn->hdev->rpa);
5570 } else {
5571 hci_copy_identity_address(conn->hdev, &conn->init_addr,
5572 &conn->init_addr_type);
5573 }
5574 } else {
5575 conn->resp_addr_type = conn->hdev->adv_addr_type;
5576 /* Check if the controller has set a Local RPA then it must be
5577 * used instead or hdev->rpa.
5578 */
5579 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5580 conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5581 bacpy(&conn->resp_addr, local_rpa);
5582 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5583 /* In case of ext adv, resp_addr will be updated in
5584 * Adv Terminated event.
5585 */
5586 if (!ext_adv_capable(conn->hdev))
5587 bacpy(&conn->resp_addr,
5588 &conn->hdev->random_addr);
5589 } else {
5590 bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5591 }
5592
5593 conn->init_addr_type = bdaddr_type;
5594 bacpy(&conn->init_addr, bdaddr);
5595
5596 /* For incoming connections, set the default minimum
5597 * and maximum connection interval. They will be used
5598 * to check if the parameters are in range and if not
5599 * trigger the connection update procedure.
5600 */
5601 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5602 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5603 }
5604 }
5605
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)5606 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5607 bdaddr_t *bdaddr, u8 bdaddr_type,
5608 bdaddr_t *local_rpa, u8 role, u16 handle,
5609 u16 interval, u16 latency,
5610 u16 supervision_timeout)
5611 {
5612 struct hci_conn_params *params;
5613 struct hci_conn *conn;
5614 struct smp_irk *irk;
5615 u8 addr_type;
5616
5617 hci_dev_lock(hdev);
5618
5619 /* All controllers implicitly stop advertising in the event of a
5620 * connection, so ensure that the state bit is cleared.
5621 */
5622 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5623
5624 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
5625 if (!conn) {
5626 /* In case of error status and there is no connection pending
5627 * just unlock as there is nothing to cleanup.
5628 */
5629 if (status)
5630 goto unlock;
5631
5632 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
5633 if (IS_ERR(conn)) {
5634 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
5635 goto unlock;
5636 }
5637
5638 conn->dst_type = bdaddr_type;
5639
5640 /* If we didn't have a hci_conn object previously
5641 * but we're in central role this must be something
5642 * initiated using an accept list. Since accept list based
5643 * connections are not "first class citizens" we don't
5644 * have full tracking of them. Therefore, we go ahead
5645 * with a "best effort" approach of determining the
5646 * initiator address based on the HCI_PRIVACY flag.
5647 */
5648 if (conn->out) {
5649 conn->resp_addr_type = bdaddr_type;
5650 bacpy(&conn->resp_addr, bdaddr);
5651 if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5652 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5653 bacpy(&conn->init_addr, &hdev->rpa);
5654 } else {
5655 hci_copy_identity_address(hdev,
5656 &conn->init_addr,
5657 &conn->init_addr_type);
5658 }
5659 }
5660 } else {
5661 cancel_delayed_work(&conn->le_conn_timeout);
5662 }
5663
5664 /* The HCI_LE_Connection_Complete event is only sent once per connection.
5665 * Processing it more than once per connection can corrupt kernel memory.
5666 *
5667 * As the connection handle is set here for the first time, it indicates
5668 * whether the connection is already set up.
5669 */
5670 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5671 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5672 goto unlock;
5673 }
5674
5675 le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5676
5677 /* Lookup the identity address from the stored connection
5678 * address and address type.
5679 *
5680 * When establishing connections to an identity address, the
5681 * connection procedure will store the resolvable random
5682 * address first. Now if it can be converted back into the
5683 * identity address, start using the identity address from
5684 * now on.
5685 */
5686 irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5687 if (irk) {
5688 bacpy(&conn->dst, &irk->bdaddr);
5689 conn->dst_type = irk->addr_type;
5690 }
5691
5692 conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5693
5694 /* All connection failure handling is taken care of by the
5695 * hci_conn_failed function which is triggered by the HCI
5696 * request completion callbacks used for connecting.
5697 */
5698 if (status || hci_conn_set_handle(conn, handle))
5699 goto unlock;
5700
5701 /* Drop the connection if it has been aborted */
5702 if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5703 hci_conn_drop(conn);
5704 goto unlock;
5705 }
5706
5707 if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5708 addr_type = BDADDR_LE_PUBLIC;
5709 else
5710 addr_type = BDADDR_LE_RANDOM;
5711
5712 /* Drop the connection if the device is blocked */
5713 if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5714 hci_conn_drop(conn);
5715 goto unlock;
5716 }
5717
5718 mgmt_device_connected(hdev, conn, NULL, 0);
5719
5720 conn->sec_level = BT_SECURITY_LOW;
5721 conn->state = BT_CONFIG;
5722
5723 /* Store current advertising instance as connection advertising instance
5724 * when sotfware rotation is in use so it can be re-enabled when
5725 * disconnected.
5726 */
5727 if (!ext_adv_capable(hdev))
5728 conn->adv_instance = hdev->cur_adv_instance;
5729
5730 conn->le_conn_interval = interval;
5731 conn->le_conn_latency = latency;
5732 conn->le_supv_timeout = supervision_timeout;
5733
5734 hci_debugfs_create_conn(conn);
5735 hci_conn_add_sysfs(conn);
5736
5737 /* The remote features procedure is defined for central
5738 * role only. So only in case of an initiated connection
5739 * request the remote features.
5740 *
5741 * If the local controller supports peripheral-initiated features
5742 * exchange, then requesting the remote features in peripheral
5743 * role is possible. Otherwise just transition into the
5744 * connected state without requesting the remote features.
5745 */
5746 if (conn->out ||
5747 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
5748 struct hci_cp_le_read_remote_features cp;
5749
5750 cp.handle = __cpu_to_le16(conn->handle);
5751
5752 hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
5753 sizeof(cp), &cp);
5754
5755 hci_conn_hold(conn);
5756 } else {
5757 conn->state = BT_CONNECTED;
5758 hci_connect_cfm(conn, status);
5759 }
5760
5761 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
5762 conn->dst_type);
5763 if (params) {
5764 hci_pend_le_list_del_init(params);
5765 if (params->conn) {
5766 hci_conn_drop(params->conn);
5767 hci_conn_put(params->conn);
5768 params->conn = NULL;
5769 }
5770 }
5771
5772 unlock:
5773 hci_update_passive_scan(hdev);
5774 hci_dev_unlock(hdev);
5775 }
5776
hci_le_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5777 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
5778 struct sk_buff *skb)
5779 {
5780 struct hci_ev_le_conn_complete *ev = data;
5781
5782 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5783
5784 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5785 NULL, ev->role, le16_to_cpu(ev->handle),
5786 le16_to_cpu(ev->interval),
5787 le16_to_cpu(ev->latency),
5788 le16_to_cpu(ev->supervision_timeout));
5789 }
5790
hci_le_enh_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5791 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
5792 struct sk_buff *skb)
5793 {
5794 struct hci_ev_le_enh_conn_complete *ev = data;
5795
5796 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5797
5798 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5799 &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
5800 le16_to_cpu(ev->interval),
5801 le16_to_cpu(ev->latency),
5802 le16_to_cpu(ev->supervision_timeout));
5803 }
5804
hci_le_ext_adv_term_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5805 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
5806 struct sk_buff *skb)
5807 {
5808 struct hci_evt_le_ext_adv_set_term *ev = data;
5809 struct hci_conn *conn;
5810 struct adv_info *adv, *n;
5811
5812 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5813
5814 /* The Bluetooth Core 5.3 specification clearly states that this event
5815 * shall not be sent when the Host disables the advertising set. So in
5816 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
5817 *
5818 * When the Host disables an advertising set, all cleanup is done via
5819 * its command callback and not needed to be duplicated here.
5820 */
5821 if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
5822 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
5823 return;
5824 }
5825
5826 hci_dev_lock(hdev);
5827
5828 adv = hci_find_adv_instance(hdev, ev->handle);
5829
5830 if (ev->status) {
5831 if (!adv)
5832 goto unlock;
5833
5834 /* Remove advertising as it has been terminated */
5835 hci_remove_adv_instance(hdev, ev->handle);
5836 mgmt_advertising_removed(NULL, hdev, ev->handle);
5837
5838 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
5839 if (adv->enabled)
5840 goto unlock;
5841 }
5842
5843 /* We are no longer advertising, clear HCI_LE_ADV */
5844 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5845 goto unlock;
5846 }
5847
5848 if (adv)
5849 adv->enabled = false;
5850
5851 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
5852 if (conn) {
5853 /* Store handle in the connection so the correct advertising
5854 * instance can be re-enabled when disconnected.
5855 */
5856 conn->adv_instance = ev->handle;
5857
5858 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
5859 bacmp(&conn->resp_addr, BDADDR_ANY))
5860 goto unlock;
5861
5862 if (!ev->handle) {
5863 bacpy(&conn->resp_addr, &hdev->random_addr);
5864 goto unlock;
5865 }
5866
5867 if (adv)
5868 bacpy(&conn->resp_addr, &adv->random_addr);
5869 }
5870
5871 unlock:
5872 hci_dev_unlock(hdev);
5873 }
5874
hci_le_conn_update_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5875 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
5876 struct sk_buff *skb)
5877 {
5878 struct hci_ev_le_conn_update_complete *ev = data;
5879 struct hci_conn *conn;
5880
5881 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5882
5883 if (ev->status)
5884 return;
5885
5886 hci_dev_lock(hdev);
5887
5888 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5889 if (conn) {
5890 conn->le_conn_interval = le16_to_cpu(ev->interval);
5891 conn->le_conn_latency = le16_to_cpu(ev->latency);
5892 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
5893 }
5894
5895 hci_dev_unlock(hdev);
5896 }
5897
5898 /* 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)5899 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
5900 bdaddr_t *addr,
5901 u8 addr_type, bool addr_resolved,
5902 u8 adv_type)
5903 {
5904 struct hci_conn *conn;
5905 struct hci_conn_params *params;
5906
5907 /* If the event is not connectable don't proceed further */
5908 if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
5909 return NULL;
5910
5911 /* Ignore if the device is blocked or hdev is suspended */
5912 if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
5913 hdev->suspended)
5914 return NULL;
5915
5916 /* Most controller will fail if we try to create new connections
5917 * while we have an existing one in peripheral role.
5918 */
5919 if (hdev->conn_hash.le_num_peripheral > 0 &&
5920 (!test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) ||
5921 !(hdev->le_states[3] & 0x10)))
5922 return NULL;
5923
5924 /* If we're not connectable only connect devices that we have in
5925 * our pend_le_conns list.
5926 */
5927 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
5928 addr_type);
5929 if (!params)
5930 return NULL;
5931
5932 if (!params->explicit_connect) {
5933 switch (params->auto_connect) {
5934 case HCI_AUTO_CONN_DIRECT:
5935 /* Only devices advertising with ADV_DIRECT_IND are
5936 * triggering a connection attempt. This is allowing
5937 * incoming connections from peripheral devices.
5938 */
5939 if (adv_type != LE_ADV_DIRECT_IND)
5940 return NULL;
5941 break;
5942 case HCI_AUTO_CONN_ALWAYS:
5943 /* Devices advertising with ADV_IND or ADV_DIRECT_IND
5944 * are triggering a connection attempt. This means
5945 * that incoming connections from peripheral device are
5946 * accepted and also outgoing connections to peripheral
5947 * devices are established when found.
5948 */
5949 break;
5950 default:
5951 return NULL;
5952 }
5953 }
5954
5955 conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
5956 BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
5957 HCI_ROLE_MASTER);
5958 if (!IS_ERR(conn)) {
5959 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
5960 * by higher layer that tried to connect, if no then
5961 * store the pointer since we don't really have any
5962 * other owner of the object besides the params that
5963 * triggered it. This way we can abort the connection if
5964 * the parameters get removed and keep the reference
5965 * count consistent once the connection is established.
5966 */
5967
5968 if (!params->explicit_connect)
5969 params->conn = hci_conn_get(conn);
5970
5971 return conn;
5972 }
5973
5974 switch (PTR_ERR(conn)) {
5975 case -EBUSY:
5976 /* If hci_connect() returns -EBUSY it means there is already
5977 * an LE connection attempt going on. Since controllers don't
5978 * support more than one connection attempt at the time, we
5979 * don't consider this an error case.
5980 */
5981 break;
5982 default:
5983 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
5984 return NULL;
5985 }
5986
5987 return NULL;
5988 }
5989
process_adv_report(struct hci_dev * hdev,u8 type,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * direct_addr,u8 direct_addr_type,s8 rssi,u8 * data,u8 len,bool ext_adv,bool ctl_time,u64 instant)5990 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
5991 u8 bdaddr_type, bdaddr_t *direct_addr,
5992 u8 direct_addr_type, s8 rssi, u8 *data, u8 len,
5993 bool ext_adv, bool ctl_time, u64 instant)
5994 {
5995 struct discovery_state *d = &hdev->discovery;
5996 struct smp_irk *irk;
5997 struct hci_conn *conn;
5998 bool match, bdaddr_resolved;
5999 u32 flags;
6000 u8 *ptr;
6001
6002 switch (type) {
6003 case LE_ADV_IND:
6004 case LE_ADV_DIRECT_IND:
6005 case LE_ADV_SCAN_IND:
6006 case LE_ADV_NONCONN_IND:
6007 case LE_ADV_SCAN_RSP:
6008 break;
6009 default:
6010 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6011 "type: 0x%02x", type);
6012 return;
6013 }
6014
6015 if (len > max_adv_len(hdev)) {
6016 bt_dev_err_ratelimited(hdev,
6017 "adv larger than maximum supported");
6018 return;
6019 }
6020
6021 /* Find the end of the data in case the report contains padded zero
6022 * bytes at the end causing an invalid length value.
6023 *
6024 * When data is NULL, len is 0 so there is no need for extra ptr
6025 * check as 'ptr < data + 0' is already false in such case.
6026 */
6027 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6028 if (ptr + 1 + *ptr > data + len)
6029 break;
6030 }
6031
6032 /* Adjust for actual length. This handles the case when remote
6033 * device is advertising with incorrect data length.
6034 */
6035 len = ptr - data;
6036
6037 /* If the direct address is present, then this report is from
6038 * a LE Direct Advertising Report event. In that case it is
6039 * important to see if the address is matching the local
6040 * controller address.
6041 */
6042 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr) {
6043 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6044 &bdaddr_resolved);
6045
6046 /* Only resolvable random addresses are valid for these
6047 * kind of reports and others can be ignored.
6048 */
6049 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6050 return;
6051
6052 /* If the controller is not using resolvable random
6053 * addresses, then this report can be ignored.
6054 */
6055 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
6056 return;
6057
6058 /* If the local IRK of the controller does not match
6059 * with the resolvable random address provided, then
6060 * this report can be ignored.
6061 */
6062 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6063 return;
6064 }
6065
6066 /* Check if we need to convert to identity address */
6067 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6068 if (irk) {
6069 bdaddr = &irk->bdaddr;
6070 bdaddr_type = irk->addr_type;
6071 }
6072
6073 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6074
6075 /* Check if we have been requested to connect to this device.
6076 *
6077 * direct_addr is set only for directed advertising reports (it is NULL
6078 * for advertising reports) and is already verified to be RPA above.
6079 */
6080 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6081 type);
6082 if (!ext_adv && conn && type == LE_ADV_IND &&
6083 len <= max_adv_len(hdev)) {
6084 /* Store report for later inclusion by
6085 * mgmt_device_connected
6086 */
6087 memcpy(conn->le_adv_data, data, len);
6088 conn->le_adv_data_len = len;
6089 }
6090
6091 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6092 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6093 else
6094 flags = 0;
6095
6096 /* All scan results should be sent up for Mesh systems */
6097 if (hci_dev_test_flag(hdev, HCI_MESH)) {
6098 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6099 rssi, flags, data, len, NULL, 0, instant);
6100 return;
6101 }
6102
6103 /* Passive scanning shouldn't trigger any device found events,
6104 * except for devices marked as CONN_REPORT for which we do send
6105 * device found events, or advertisement monitoring requested.
6106 */
6107 if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6108 if (type == LE_ADV_DIRECT_IND)
6109 return;
6110
6111 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6112 bdaddr, bdaddr_type) &&
6113 idr_is_empty(&hdev->adv_monitors_idr))
6114 return;
6115
6116 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6117 rssi, flags, data, len, NULL, 0, 0);
6118 return;
6119 }
6120
6121 /* When receiving a scan response, then there is no way to
6122 * know if the remote device is connectable or not. However
6123 * since scan responses are merged with a previously seen
6124 * advertising report, the flags field from that report
6125 * will be used.
6126 *
6127 * In the unlikely case that a controller just sends a scan
6128 * response event that doesn't match the pending report, then
6129 * it is marked as a standalone SCAN_RSP.
6130 */
6131 if (type == LE_ADV_SCAN_RSP)
6132 flags = MGMT_DEV_FOUND_SCAN_RSP;
6133
6134 /* If there's nothing pending either store the data from this
6135 * event or send an immediate device found event if the data
6136 * should not be stored for later.
6137 */
6138 if (!ext_adv && !has_pending_adv_report(hdev)) {
6139 /* If the report will trigger a SCAN_REQ store it for
6140 * later merging.
6141 */
6142 if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) {
6143 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6144 rssi, flags, data, len);
6145 return;
6146 }
6147
6148 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6149 rssi, flags, data, len, NULL, 0, 0);
6150 return;
6151 }
6152
6153 /* Check if the pending report is for the same device as the new one */
6154 match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6155 bdaddr_type == d->last_adv_addr_type);
6156
6157 /* If the pending data doesn't match this report or this isn't a
6158 * scan response (e.g. we got a duplicate ADV_IND) then force
6159 * sending of the pending data.
6160 */
6161 if (type != LE_ADV_SCAN_RSP || !match) {
6162 /* Send out whatever is in the cache, but skip duplicates */
6163 if (!match)
6164 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6165 d->last_adv_addr_type, NULL,
6166 d->last_adv_rssi, d->last_adv_flags,
6167 d->last_adv_data,
6168 d->last_adv_data_len, NULL, 0, 0);
6169
6170 /* If the new report will trigger a SCAN_REQ store it for
6171 * later merging.
6172 */
6173 if (!ext_adv && (type == LE_ADV_IND ||
6174 type == LE_ADV_SCAN_IND)) {
6175 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6176 rssi, flags, data, len);
6177 return;
6178 }
6179
6180 /* The advertising reports cannot be merged, so clear
6181 * the pending report and send out a device found event.
6182 */
6183 clear_pending_adv_report(hdev);
6184 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6185 rssi, flags, data, len, NULL, 0, 0);
6186 return;
6187 }
6188
6189 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6190 * the new event is a SCAN_RSP. We can therefore proceed with
6191 * sending a merged device found event.
6192 */
6193 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6194 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6195 d->last_adv_data, d->last_adv_data_len, data, len, 0);
6196 clear_pending_adv_report(hdev);
6197 }
6198
hci_le_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6199 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6200 struct sk_buff *skb)
6201 {
6202 struct hci_ev_le_advertising_report *ev = data;
6203 u64 instant = jiffies;
6204
6205 if (!ev->num)
6206 return;
6207
6208 hci_dev_lock(hdev);
6209
6210 while (ev->num--) {
6211 struct hci_ev_le_advertising_info *info;
6212 s8 rssi;
6213
6214 info = hci_le_ev_skb_pull(hdev, skb,
6215 HCI_EV_LE_ADVERTISING_REPORT,
6216 sizeof(*info));
6217 if (!info)
6218 break;
6219
6220 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6221 info->length + 1))
6222 break;
6223
6224 if (info->length <= max_adv_len(hdev)) {
6225 rssi = info->data[info->length];
6226 process_adv_report(hdev, info->type, &info->bdaddr,
6227 info->bdaddr_type, NULL, 0, rssi,
6228 info->data, info->length, false,
6229 false, instant);
6230 } else {
6231 bt_dev_err(hdev, "Dropping invalid advertising data");
6232 }
6233 }
6234
6235 hci_dev_unlock(hdev);
6236 }
6237
ext_evt_type_to_legacy(struct hci_dev * hdev,u16 evt_type)6238 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6239 {
6240 if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6241 switch (evt_type) {
6242 case LE_LEGACY_ADV_IND:
6243 return LE_ADV_IND;
6244 case LE_LEGACY_ADV_DIRECT_IND:
6245 return LE_ADV_DIRECT_IND;
6246 case LE_LEGACY_ADV_SCAN_IND:
6247 return LE_ADV_SCAN_IND;
6248 case LE_LEGACY_NONCONN_IND:
6249 return LE_ADV_NONCONN_IND;
6250 case LE_LEGACY_SCAN_RSP_ADV:
6251 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6252 return LE_ADV_SCAN_RSP;
6253 }
6254
6255 goto invalid;
6256 }
6257
6258 if (evt_type & LE_EXT_ADV_CONN_IND) {
6259 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6260 return LE_ADV_DIRECT_IND;
6261
6262 return LE_ADV_IND;
6263 }
6264
6265 if (evt_type & LE_EXT_ADV_SCAN_RSP)
6266 return LE_ADV_SCAN_RSP;
6267
6268 if (evt_type & LE_EXT_ADV_SCAN_IND)
6269 return LE_ADV_SCAN_IND;
6270
6271 if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6272 evt_type & LE_EXT_ADV_DIRECT_IND)
6273 return LE_ADV_NONCONN_IND;
6274
6275 invalid:
6276 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6277 evt_type);
6278
6279 return LE_ADV_INVALID;
6280 }
6281
hci_le_ext_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6282 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6283 struct sk_buff *skb)
6284 {
6285 struct hci_ev_le_ext_adv_report *ev = data;
6286 u64 instant = jiffies;
6287
6288 if (!ev->num)
6289 return;
6290
6291 hci_dev_lock(hdev);
6292
6293 while (ev->num--) {
6294 struct hci_ev_le_ext_adv_info *info;
6295 u8 legacy_evt_type;
6296 u16 evt_type;
6297
6298 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6299 sizeof(*info));
6300 if (!info)
6301 break;
6302
6303 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6304 info->length))
6305 break;
6306
6307 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6308 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6309 if (legacy_evt_type != LE_ADV_INVALID) {
6310 process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6311 info->bdaddr_type, NULL, 0,
6312 info->rssi, info->data, info->length,
6313 !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6314 false, instant);
6315 }
6316 }
6317
6318 hci_dev_unlock(hdev);
6319 }
6320
hci_le_pa_term_sync(struct hci_dev * hdev,__le16 handle)6321 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6322 {
6323 struct hci_cp_le_pa_term_sync cp;
6324
6325 memset(&cp, 0, sizeof(cp));
6326 cp.handle = handle;
6327
6328 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6329 }
6330
hci_le_pa_sync_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6331 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6332 struct sk_buff *skb)
6333 {
6334 struct hci_ev_le_pa_sync_established *ev = data;
6335 int mask = hdev->link_mode;
6336 __u8 flags = 0;
6337 struct hci_conn *pa_sync;
6338
6339 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6340
6341 hci_dev_lock(hdev);
6342
6343 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6344
6345 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags);
6346 if (!(mask & HCI_LM_ACCEPT)) {
6347 hci_le_pa_term_sync(hdev, ev->handle);
6348 goto unlock;
6349 }
6350
6351 if (!(flags & HCI_PROTO_DEFER))
6352 goto unlock;
6353
6354 if (ev->status) {
6355 /* Add connection to indicate the failed PA sync event */
6356 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6357 HCI_ROLE_SLAVE);
6358
6359 if (!pa_sync)
6360 goto unlock;
6361
6362 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6363
6364 /* Notify iso layer */
6365 hci_connect_cfm(pa_sync, ev->status);
6366 }
6367
6368 unlock:
6369 hci_dev_unlock(hdev);
6370 }
6371
hci_le_per_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6372 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6373 struct sk_buff *skb)
6374 {
6375 struct hci_ev_le_per_adv_report *ev = data;
6376 int mask = hdev->link_mode;
6377 __u8 flags = 0;
6378
6379 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6380
6381 hci_dev_lock(hdev);
6382
6383 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6384 if (!(mask & HCI_LM_ACCEPT))
6385 hci_le_pa_term_sync(hdev, ev->sync_handle);
6386
6387 hci_dev_unlock(hdev);
6388 }
6389
hci_le_remote_feat_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6390 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6391 struct sk_buff *skb)
6392 {
6393 struct hci_ev_le_remote_feat_complete *ev = data;
6394 struct hci_conn *conn;
6395
6396 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6397
6398 hci_dev_lock(hdev);
6399
6400 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6401 if (conn) {
6402 if (!ev->status)
6403 memcpy(conn->features[0], ev->features, 8);
6404
6405 if (conn->state == BT_CONFIG) {
6406 __u8 status;
6407
6408 /* If the local controller supports peripheral-initiated
6409 * features exchange, but the remote controller does
6410 * not, then it is possible that the error code 0x1a
6411 * for unsupported remote feature gets returned.
6412 *
6413 * In this specific case, allow the connection to
6414 * transition into connected state and mark it as
6415 * successful.
6416 */
6417 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE &&
6418 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6419 status = 0x00;
6420 else
6421 status = ev->status;
6422
6423 conn->state = BT_CONNECTED;
6424 hci_connect_cfm(conn, status);
6425 hci_conn_drop(conn);
6426 }
6427 }
6428
6429 hci_dev_unlock(hdev);
6430 }
6431
hci_le_ltk_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6432 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6433 struct sk_buff *skb)
6434 {
6435 struct hci_ev_le_ltk_req *ev = data;
6436 struct hci_cp_le_ltk_reply cp;
6437 struct hci_cp_le_ltk_neg_reply neg;
6438 struct hci_conn *conn;
6439 struct smp_ltk *ltk;
6440
6441 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6442
6443 hci_dev_lock(hdev);
6444
6445 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6446 if (conn == NULL)
6447 goto not_found;
6448
6449 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6450 if (!ltk)
6451 goto not_found;
6452
6453 if (smp_ltk_is_sc(ltk)) {
6454 /* With SC both EDiv and Rand are set to zero */
6455 if (ev->ediv || ev->rand)
6456 goto not_found;
6457 } else {
6458 /* For non-SC keys check that EDiv and Rand match */
6459 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6460 goto not_found;
6461 }
6462
6463 memcpy(cp.ltk, ltk->val, ltk->enc_size);
6464 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6465 cp.handle = cpu_to_le16(conn->handle);
6466
6467 conn->pending_sec_level = smp_ltk_sec_level(ltk);
6468
6469 conn->enc_key_size = ltk->enc_size;
6470
6471 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6472
6473 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6474 * temporary key used to encrypt a connection following
6475 * pairing. It is used during the Encrypted Session Setup to
6476 * distribute the keys. Later, security can be re-established
6477 * using a distributed LTK.
6478 */
6479 if (ltk->type == SMP_STK) {
6480 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6481 list_del_rcu(<k->list);
6482 kfree_rcu(ltk, rcu);
6483 } else {
6484 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6485 }
6486
6487 hci_dev_unlock(hdev);
6488
6489 return;
6490
6491 not_found:
6492 neg.handle = ev->handle;
6493 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6494 hci_dev_unlock(hdev);
6495 }
6496
send_conn_param_neg_reply(struct hci_dev * hdev,u16 handle,u8 reason)6497 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6498 u8 reason)
6499 {
6500 struct hci_cp_le_conn_param_req_neg_reply cp;
6501
6502 cp.handle = cpu_to_le16(handle);
6503 cp.reason = reason;
6504
6505 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6506 &cp);
6507 }
6508
hci_le_remote_conn_param_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6509 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6510 struct sk_buff *skb)
6511 {
6512 struct hci_ev_le_remote_conn_param_req *ev = data;
6513 struct hci_cp_le_conn_param_req_reply cp;
6514 struct hci_conn *hcon;
6515 u16 handle, min, max, latency, timeout;
6516
6517 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6518
6519 handle = le16_to_cpu(ev->handle);
6520 min = le16_to_cpu(ev->interval_min);
6521 max = le16_to_cpu(ev->interval_max);
6522 latency = le16_to_cpu(ev->latency);
6523 timeout = le16_to_cpu(ev->timeout);
6524
6525 hcon = hci_conn_hash_lookup_handle(hdev, handle);
6526 if (!hcon || hcon->state != BT_CONNECTED)
6527 return send_conn_param_neg_reply(hdev, handle,
6528 HCI_ERROR_UNKNOWN_CONN_ID);
6529
6530 if (max > hcon->le_conn_max_interval)
6531 return send_conn_param_neg_reply(hdev, handle,
6532 HCI_ERROR_INVALID_LL_PARAMS);
6533
6534 if (hci_check_conn_params(min, max, latency, timeout))
6535 return send_conn_param_neg_reply(hdev, handle,
6536 HCI_ERROR_INVALID_LL_PARAMS);
6537
6538 if (hcon->role == HCI_ROLE_MASTER) {
6539 struct hci_conn_params *params;
6540 u8 store_hint;
6541
6542 hci_dev_lock(hdev);
6543
6544 params = hci_conn_params_lookup(hdev, &hcon->dst,
6545 hcon->dst_type);
6546 if (params) {
6547 params->conn_min_interval = min;
6548 params->conn_max_interval = max;
6549 params->conn_latency = latency;
6550 params->supervision_timeout = timeout;
6551 store_hint = 0x01;
6552 } else {
6553 store_hint = 0x00;
6554 }
6555
6556 hci_dev_unlock(hdev);
6557
6558 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6559 store_hint, min, max, latency, timeout);
6560 }
6561
6562 cp.handle = ev->handle;
6563 cp.interval_min = ev->interval_min;
6564 cp.interval_max = ev->interval_max;
6565 cp.latency = ev->latency;
6566 cp.timeout = ev->timeout;
6567 cp.min_ce_len = 0;
6568 cp.max_ce_len = 0;
6569
6570 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6571 }
6572
hci_le_direct_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6573 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6574 struct sk_buff *skb)
6575 {
6576 struct hci_ev_le_direct_adv_report *ev = data;
6577 u64 instant = jiffies;
6578 int i;
6579
6580 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6581 flex_array_size(ev, info, ev->num)))
6582 return;
6583
6584 if (!ev->num)
6585 return;
6586
6587 hci_dev_lock(hdev);
6588
6589 for (i = 0; i < ev->num; i++) {
6590 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6591
6592 process_adv_report(hdev, info->type, &info->bdaddr,
6593 info->bdaddr_type, &info->direct_addr,
6594 info->direct_addr_type, info->rssi, NULL, 0,
6595 false, false, instant);
6596 }
6597
6598 hci_dev_unlock(hdev);
6599 }
6600
hci_le_phy_update_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6601 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6602 struct sk_buff *skb)
6603 {
6604 struct hci_ev_le_phy_update_complete *ev = data;
6605 struct hci_conn *conn;
6606
6607 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6608
6609 if (ev->status)
6610 return;
6611
6612 hci_dev_lock(hdev);
6613
6614 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6615 if (!conn)
6616 goto unlock;
6617
6618 conn->le_tx_phy = ev->tx_phy;
6619 conn->le_rx_phy = ev->rx_phy;
6620
6621 unlock:
6622 hci_dev_unlock(hdev);
6623 }
6624
hci_le_cis_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6625 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6626 struct sk_buff *skb)
6627 {
6628 struct hci_evt_le_cis_established *ev = data;
6629 struct hci_conn *conn;
6630 struct bt_iso_qos *qos;
6631 bool pending = false;
6632 u16 handle = __le16_to_cpu(ev->handle);
6633 u32 c_sdu_interval, p_sdu_interval;
6634
6635 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6636
6637 hci_dev_lock(hdev);
6638
6639 conn = hci_conn_hash_lookup_handle(hdev, handle);
6640 if (!conn) {
6641 bt_dev_err(hdev,
6642 "Unable to find connection with handle 0x%4.4x",
6643 handle);
6644 goto unlock;
6645 }
6646
6647 if (conn->type != ISO_LINK) {
6648 bt_dev_err(hdev,
6649 "Invalid connection link type handle 0x%4.4x",
6650 handle);
6651 goto unlock;
6652 }
6653
6654 qos = &conn->iso_qos;
6655
6656 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6657
6658 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part G
6659 * page 3075:
6660 * Transport_Latency_C_To_P = CIG_Sync_Delay + (FT_C_To_P) ×
6661 * ISO_Interval + SDU_Interval_C_To_P
6662 * ...
6663 * SDU_Interval = (CIG_Sync_Delay + (FT) x ISO_Interval) -
6664 * Transport_Latency
6665 */
6666 c_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6667 (ev->c_ft * le16_to_cpu(ev->interval) * 1250)) -
6668 get_unaligned_le24(ev->c_latency);
6669 p_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6670 (ev->p_ft * le16_to_cpu(ev->interval) * 1250)) -
6671 get_unaligned_le24(ev->p_latency);
6672
6673 switch (conn->role) {
6674 case HCI_ROLE_SLAVE:
6675 qos->ucast.in.interval = c_sdu_interval;
6676 qos->ucast.out.interval = p_sdu_interval;
6677 /* Convert Transport Latency (us) to Latency (msec) */
6678 qos->ucast.in.latency =
6679 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6680 1000);
6681 qos->ucast.out.latency =
6682 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6683 1000);
6684 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6685 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6686 qos->ucast.in.phy = ev->c_phy;
6687 qos->ucast.out.phy = ev->p_phy;
6688 break;
6689 case HCI_ROLE_MASTER:
6690 qos->ucast.in.interval = p_sdu_interval;
6691 qos->ucast.out.interval = c_sdu_interval;
6692 /* Convert Transport Latency (us) to Latency (msec) */
6693 qos->ucast.out.latency =
6694 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6695 1000);
6696 qos->ucast.in.latency =
6697 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6698 1000);
6699 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6700 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6701 qos->ucast.out.phy = ev->c_phy;
6702 qos->ucast.in.phy = ev->p_phy;
6703 break;
6704 }
6705
6706 if (!ev->status) {
6707 conn->state = BT_CONNECTED;
6708 hci_debugfs_create_conn(conn);
6709 hci_conn_add_sysfs(conn);
6710 hci_iso_setup_path(conn);
6711 goto unlock;
6712 }
6713
6714 conn->state = BT_CLOSED;
6715 hci_connect_cfm(conn, ev->status);
6716 hci_conn_del(conn);
6717
6718 unlock:
6719 if (pending)
6720 hci_le_create_cis_pending(hdev);
6721
6722 hci_dev_unlock(hdev);
6723 }
6724
hci_le_reject_cis(struct hci_dev * hdev,__le16 handle)6725 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6726 {
6727 struct hci_cp_le_reject_cis cp;
6728
6729 memset(&cp, 0, sizeof(cp));
6730 cp.handle = handle;
6731 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6732 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6733 }
6734
hci_le_accept_cis(struct hci_dev * hdev,__le16 handle)6735 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6736 {
6737 struct hci_cp_le_accept_cis cp;
6738
6739 memset(&cp, 0, sizeof(cp));
6740 cp.handle = handle;
6741 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6742 }
6743
hci_le_cis_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6744 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6745 struct sk_buff *skb)
6746 {
6747 struct hci_evt_le_cis_req *ev = data;
6748 u16 acl_handle, cis_handle;
6749 struct hci_conn *acl, *cis;
6750 int mask;
6751 __u8 flags = 0;
6752
6753 acl_handle = __le16_to_cpu(ev->acl_handle);
6754 cis_handle = __le16_to_cpu(ev->cis_handle);
6755
6756 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
6757 acl_handle, cis_handle, ev->cig_id, ev->cis_id);
6758
6759 hci_dev_lock(hdev);
6760
6761 acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
6762 if (!acl)
6763 goto unlock;
6764
6765 mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
6766 if (!(mask & HCI_LM_ACCEPT)) {
6767 hci_le_reject_cis(hdev, ev->cis_handle);
6768 goto unlock;
6769 }
6770
6771 cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
6772 if (!cis) {
6773 cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
6774 cis_handle);
6775 if (IS_ERR(cis)) {
6776 hci_le_reject_cis(hdev, ev->cis_handle);
6777 goto unlock;
6778 }
6779 }
6780
6781 cis->iso_qos.ucast.cig = ev->cig_id;
6782 cis->iso_qos.ucast.cis = ev->cis_id;
6783
6784 if (!(flags & HCI_PROTO_DEFER)) {
6785 hci_le_accept_cis(hdev, ev->cis_handle);
6786 } else {
6787 cis->state = BT_CONNECT2;
6788 hci_connect_cfm(cis, 0);
6789 }
6790
6791 unlock:
6792 hci_dev_unlock(hdev);
6793 }
6794
hci_iso_term_big_sync(struct hci_dev * hdev,void * data)6795 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
6796 {
6797 u8 handle = PTR_UINT(data);
6798
6799 return hci_le_terminate_big_sync(hdev, handle,
6800 HCI_ERROR_LOCAL_HOST_TERM);
6801 }
6802
hci_le_create_big_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6803 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
6804 struct sk_buff *skb)
6805 {
6806 struct hci_evt_le_create_big_complete *ev = data;
6807 struct hci_conn *conn;
6808 __u8 i = 0;
6809
6810 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
6811
6812 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
6813 flex_array_size(ev, bis_handle, ev->num_bis)))
6814 return;
6815
6816 hci_dev_lock(hdev);
6817 rcu_read_lock();
6818
6819 /* Connect all BISes that are bound to the BIG */
6820 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6821 if (bacmp(&conn->dst, BDADDR_ANY) ||
6822 conn->type != ISO_LINK ||
6823 conn->iso_qos.bcast.big != ev->handle)
6824 continue;
6825
6826 if (hci_conn_set_handle(conn,
6827 __le16_to_cpu(ev->bis_handle[i++])))
6828 continue;
6829
6830 if (!ev->status) {
6831 conn->state = BT_CONNECTED;
6832 set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
6833 rcu_read_unlock();
6834 hci_debugfs_create_conn(conn);
6835 hci_conn_add_sysfs(conn);
6836 hci_iso_setup_path(conn);
6837 rcu_read_lock();
6838 continue;
6839 }
6840
6841 hci_connect_cfm(conn, ev->status);
6842 rcu_read_unlock();
6843 hci_conn_del(conn);
6844 rcu_read_lock();
6845 }
6846
6847 rcu_read_unlock();
6848
6849 if (!ev->status && !i)
6850 /* If no BISes have been connected for the BIG,
6851 * terminate. This is in case all bound connections
6852 * have been closed before the BIG creation
6853 * has completed.
6854 */
6855 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
6856 UINT_PTR(ev->handle), NULL);
6857
6858 hci_dev_unlock(hdev);
6859 }
6860
hci_le_big_sync_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6861 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
6862 struct sk_buff *skb)
6863 {
6864 struct hci_evt_le_big_sync_estabilished *ev = data;
6865 struct hci_conn *bis;
6866 struct hci_conn *pa_sync;
6867 int i;
6868
6869 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6870
6871 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
6872 flex_array_size(ev, bis, ev->num_bis)))
6873 return;
6874
6875 hci_dev_lock(hdev);
6876
6877 if (!ev->status) {
6878 pa_sync = hci_conn_hash_lookup_pa_sync_big_handle(hdev, ev->handle);
6879 if (pa_sync)
6880 /* Also mark the BIG sync established event on the
6881 * associated PA sync hcon
6882 */
6883 set_bit(HCI_CONN_BIG_SYNC, &pa_sync->flags);
6884 }
6885
6886 for (i = 0; i < ev->num_bis; i++) {
6887 u16 handle = le16_to_cpu(ev->bis[i]);
6888 __le32 interval;
6889
6890 bis = hci_conn_hash_lookup_handle(hdev, handle);
6891 if (!bis) {
6892 if (handle > HCI_CONN_HANDLE_MAX) {
6893 bt_dev_dbg(hdev, "ignore too large handle %u", handle);
6894 continue;
6895 }
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 hci_le_pa_term_sync(hdev, ev->sync_handle);
6953 goto unlock;
6954 }
6955
6956 if (!(flags & HCI_PROTO_DEFER))
6957 goto unlock;
6958
6959 pa_sync = hci_conn_hash_lookup_pa_sync_handle
6960 (hdev,
6961 le16_to_cpu(ev->sync_handle));
6962
6963 if (pa_sync)
6964 goto unlock;
6965
6966 /* Add connection to indicate the PA sync event */
6967 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6968 HCI_ROLE_SLAVE);
6969
6970 if (IS_ERR(pa_sync))
6971 goto unlock;
6972
6973 pa_sync->sync_handle = le16_to_cpu(ev->sync_handle);
6974 set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags);
6975
6976 /* Notify iso layer */
6977 hci_connect_cfm(pa_sync, 0x00);
6978
6979 /* Notify MGMT layer */
6980 mgmt_device_connected(hdev, pa_sync, NULL, 0);
6981
6982 unlock:
6983 hci_dev_unlock(hdev);
6984 }
6985
6986 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
6987 [_op] = { \
6988 .func = _func, \
6989 .min_len = _min_len, \
6990 .max_len = _max_len, \
6991 }
6992
6993 #define HCI_LE_EV(_op, _func, _len) \
6994 HCI_LE_EV_VL(_op, _func, _len, _len)
6995
6996 #define HCI_LE_EV_STATUS(_op, _func) \
6997 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
6998
6999 /* Entries in this table shall have their position according to the subevent
7000 * opcode they handle so the use of the macros above is recommend since it does
7001 * attempt to initialize at its proper index using Designated Initializers that
7002 * way events without a callback function can be ommited.
7003 */
7004 static const struct hci_le_ev {
7005 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
7006 u16 min_len;
7007 u16 max_len;
7008 } hci_le_ev_table[U8_MAX + 1] = {
7009 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
7010 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
7011 sizeof(struct hci_ev_le_conn_complete)),
7012 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
7013 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
7014 sizeof(struct hci_ev_le_advertising_report),
7015 HCI_MAX_EVENT_SIZE),
7016 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7017 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7018 hci_le_conn_update_complete_evt,
7019 sizeof(struct hci_ev_le_conn_update_complete)),
7020 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7021 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7022 hci_le_remote_feat_complete_evt,
7023 sizeof(struct hci_ev_le_remote_feat_complete)),
7024 /* [0x05 = HCI_EV_LE_LTK_REQ] */
7025 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7026 sizeof(struct hci_ev_le_ltk_req)),
7027 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7028 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7029 hci_le_remote_conn_param_req_evt,
7030 sizeof(struct hci_ev_le_remote_conn_param_req)),
7031 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7032 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7033 hci_le_enh_conn_complete_evt,
7034 sizeof(struct hci_ev_le_enh_conn_complete)),
7035 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7036 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7037 sizeof(struct hci_ev_le_direct_adv_report),
7038 HCI_MAX_EVENT_SIZE),
7039 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7040 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7041 sizeof(struct hci_ev_le_phy_update_complete)),
7042 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7043 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7044 sizeof(struct hci_ev_le_ext_adv_report),
7045 HCI_MAX_EVENT_SIZE),
7046 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7047 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7048 hci_le_pa_sync_estabilished_evt,
7049 sizeof(struct hci_ev_le_pa_sync_established)),
7050 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7051 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7052 hci_le_per_adv_report_evt,
7053 sizeof(struct hci_ev_le_per_adv_report),
7054 HCI_MAX_EVENT_SIZE),
7055 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7056 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7057 sizeof(struct hci_evt_le_ext_adv_set_term)),
7058 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7059 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7060 sizeof(struct hci_evt_le_cis_established)),
7061 /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7062 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7063 sizeof(struct hci_evt_le_cis_req)),
7064 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7065 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7066 hci_le_create_big_complete_evt,
7067 sizeof(struct hci_evt_le_create_big_complete),
7068 HCI_MAX_EVENT_SIZE),
7069 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABILISHED] */
7070 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7071 hci_le_big_sync_established_evt,
7072 sizeof(struct hci_evt_le_big_sync_estabilished),
7073 HCI_MAX_EVENT_SIZE),
7074 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7075 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7076 hci_le_big_info_adv_report_evt,
7077 sizeof(struct hci_evt_le_big_info_adv_report),
7078 HCI_MAX_EVENT_SIZE),
7079 };
7080
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)7081 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7082 struct sk_buff *skb, u16 *opcode, u8 *status,
7083 hci_req_complete_t *req_complete,
7084 hci_req_complete_skb_t *req_complete_skb)
7085 {
7086 struct hci_ev_le_meta *ev = data;
7087 const struct hci_le_ev *subev;
7088
7089 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7090
7091 /* Only match event if command OGF is for LE */
7092 if (hdev->req_skb &&
7093 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 &&
7094 hci_skb_event(hdev->req_skb) == ev->subevent) {
7095 *opcode = hci_skb_opcode(hdev->req_skb);
7096 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7097 req_complete_skb);
7098 }
7099
7100 subev = &hci_le_ev_table[ev->subevent];
7101 if (!subev->func)
7102 return;
7103
7104 if (skb->len < subev->min_len) {
7105 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7106 ev->subevent, skb->len, subev->min_len);
7107 return;
7108 }
7109
7110 /* Just warn if the length is over max_len size it still be
7111 * possible to partially parse the event so leave to callback to
7112 * decide if that is acceptable.
7113 */
7114 if (skb->len > subev->max_len)
7115 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7116 ev->subevent, skb->len, subev->max_len);
7117 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7118 if (!data)
7119 return;
7120
7121 subev->func(hdev, data, skb);
7122 }
7123
hci_get_cmd_complete(struct hci_dev * hdev,u16 opcode,u8 event,struct sk_buff * skb)7124 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7125 u8 event, struct sk_buff *skb)
7126 {
7127 struct hci_ev_cmd_complete *ev;
7128 struct hci_event_hdr *hdr;
7129
7130 if (!skb)
7131 return false;
7132
7133 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7134 if (!hdr)
7135 return false;
7136
7137 if (event) {
7138 if (hdr->evt != event)
7139 return false;
7140 return true;
7141 }
7142
7143 /* Check if request ended in Command Status - no way to retrieve
7144 * any extra parameters in this case.
7145 */
7146 if (hdr->evt == HCI_EV_CMD_STATUS)
7147 return false;
7148
7149 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7150 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7151 hdr->evt);
7152 return false;
7153 }
7154
7155 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7156 if (!ev)
7157 return false;
7158
7159 if (opcode != __le16_to_cpu(ev->opcode)) {
7160 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7161 __le16_to_cpu(ev->opcode));
7162 return false;
7163 }
7164
7165 return true;
7166 }
7167
hci_store_wake_reason(struct hci_dev * hdev,u8 event,struct sk_buff * skb)7168 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7169 struct sk_buff *skb)
7170 {
7171 struct hci_ev_le_advertising_info *adv;
7172 struct hci_ev_le_direct_adv_info *direct_adv;
7173 struct hci_ev_le_ext_adv_info *ext_adv;
7174 const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7175 const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7176
7177 hci_dev_lock(hdev);
7178
7179 /* If we are currently suspended and this is the first BT event seen,
7180 * save the wake reason associated with the event.
7181 */
7182 if (!hdev->suspended || hdev->wake_reason)
7183 goto unlock;
7184
7185 /* Default to remote wake. Values for wake_reason are documented in the
7186 * Bluez mgmt api docs.
7187 */
7188 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7189
7190 /* Once configured for remote wakeup, we should only wake up for
7191 * reconnections. It's useful to see which device is waking us up so
7192 * keep track of the bdaddr of the connection event that woke us up.
7193 */
7194 if (event == HCI_EV_CONN_REQUEST) {
7195 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7196 hdev->wake_addr_type = BDADDR_BREDR;
7197 } else if (event == HCI_EV_CONN_COMPLETE) {
7198 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7199 hdev->wake_addr_type = BDADDR_BREDR;
7200 } else if (event == HCI_EV_LE_META) {
7201 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7202 u8 subevent = le_ev->subevent;
7203 u8 *ptr = &skb->data[sizeof(*le_ev)];
7204 u8 num_reports = *ptr;
7205
7206 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7207 subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7208 subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7209 num_reports) {
7210 adv = (void *)(ptr + 1);
7211 direct_adv = (void *)(ptr + 1);
7212 ext_adv = (void *)(ptr + 1);
7213
7214 switch (subevent) {
7215 case HCI_EV_LE_ADVERTISING_REPORT:
7216 bacpy(&hdev->wake_addr, &adv->bdaddr);
7217 hdev->wake_addr_type = adv->bdaddr_type;
7218 break;
7219 case HCI_EV_LE_DIRECT_ADV_REPORT:
7220 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7221 hdev->wake_addr_type = direct_adv->bdaddr_type;
7222 break;
7223 case HCI_EV_LE_EXT_ADV_REPORT:
7224 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7225 hdev->wake_addr_type = ext_adv->bdaddr_type;
7226 break;
7227 }
7228 }
7229 } else {
7230 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7231 }
7232
7233 unlock:
7234 hci_dev_unlock(hdev);
7235 }
7236
7237 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7238 [_op] = { \
7239 .req = false, \
7240 .func = _func, \
7241 .min_len = _min_len, \
7242 .max_len = _max_len, \
7243 }
7244
7245 #define HCI_EV(_op, _func, _len) \
7246 HCI_EV_VL(_op, _func, _len, _len)
7247
7248 #define HCI_EV_STATUS(_op, _func) \
7249 HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7250
7251 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7252 [_op] = { \
7253 .req = true, \
7254 .func_req = _func, \
7255 .min_len = _min_len, \
7256 .max_len = _max_len, \
7257 }
7258
7259 #define HCI_EV_REQ(_op, _func, _len) \
7260 HCI_EV_REQ_VL(_op, _func, _len, _len)
7261
7262 /* Entries in this table shall have their position according to the event opcode
7263 * they handle so the use of the macros above is recommend since it does attempt
7264 * to initialize at its proper index using Designated Initializers that way
7265 * events without a callback function don't have entered.
7266 */
7267 static const struct hci_ev {
7268 bool req;
7269 union {
7270 void (*func)(struct hci_dev *hdev, void *data,
7271 struct sk_buff *skb);
7272 void (*func_req)(struct hci_dev *hdev, void *data,
7273 struct sk_buff *skb, u16 *opcode, u8 *status,
7274 hci_req_complete_t *req_complete,
7275 hci_req_complete_skb_t *req_complete_skb);
7276 };
7277 u16 min_len;
7278 u16 max_len;
7279 } hci_ev_table[U8_MAX + 1] = {
7280 /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7281 HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7282 /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7283 HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7284 sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7285 /* [0x03 = HCI_EV_CONN_COMPLETE] */
7286 HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7287 sizeof(struct hci_ev_conn_complete)),
7288 /* [0x04 = HCI_EV_CONN_REQUEST] */
7289 HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7290 sizeof(struct hci_ev_conn_request)),
7291 /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7292 HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7293 sizeof(struct hci_ev_disconn_complete)),
7294 /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7295 HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7296 sizeof(struct hci_ev_auth_complete)),
7297 /* [0x07 = HCI_EV_REMOTE_NAME] */
7298 HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7299 sizeof(struct hci_ev_remote_name)),
7300 /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7301 HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7302 sizeof(struct hci_ev_encrypt_change)),
7303 /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7304 HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7305 hci_change_link_key_complete_evt,
7306 sizeof(struct hci_ev_change_link_key_complete)),
7307 /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7308 HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7309 sizeof(struct hci_ev_remote_features)),
7310 /* [0x0e = HCI_EV_CMD_COMPLETE] */
7311 HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7312 sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7313 /* [0x0f = HCI_EV_CMD_STATUS] */
7314 HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7315 sizeof(struct hci_ev_cmd_status)),
7316 /* [0x10 = HCI_EV_CMD_STATUS] */
7317 HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7318 sizeof(struct hci_ev_hardware_error)),
7319 /* [0x12 = HCI_EV_ROLE_CHANGE] */
7320 HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7321 sizeof(struct hci_ev_role_change)),
7322 /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7323 HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7324 sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7325 /* [0x14 = HCI_EV_MODE_CHANGE] */
7326 HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7327 sizeof(struct hci_ev_mode_change)),
7328 /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7329 HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7330 sizeof(struct hci_ev_pin_code_req)),
7331 /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7332 HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7333 sizeof(struct hci_ev_link_key_req)),
7334 /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7335 HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7336 sizeof(struct hci_ev_link_key_notify)),
7337 /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7338 HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7339 sizeof(struct hci_ev_clock_offset)),
7340 /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7341 HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7342 sizeof(struct hci_ev_pkt_type_change)),
7343 /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7344 HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7345 sizeof(struct hci_ev_pscan_rep_mode)),
7346 /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7347 HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7348 hci_inquiry_result_with_rssi_evt,
7349 sizeof(struct hci_ev_inquiry_result_rssi),
7350 HCI_MAX_EVENT_SIZE),
7351 /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7352 HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7353 sizeof(struct hci_ev_remote_ext_features)),
7354 /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7355 HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7356 sizeof(struct hci_ev_sync_conn_complete)),
7357 /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7358 HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7359 hci_extended_inquiry_result_evt,
7360 sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7361 /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7362 HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7363 sizeof(struct hci_ev_key_refresh_complete)),
7364 /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7365 HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7366 sizeof(struct hci_ev_io_capa_request)),
7367 /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7368 HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7369 sizeof(struct hci_ev_io_capa_reply)),
7370 /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7371 HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7372 sizeof(struct hci_ev_user_confirm_req)),
7373 /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7374 HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7375 sizeof(struct hci_ev_user_passkey_req)),
7376 /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7377 HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7378 sizeof(struct hci_ev_remote_oob_data_request)),
7379 /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7380 HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7381 sizeof(struct hci_ev_simple_pair_complete)),
7382 /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7383 HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7384 sizeof(struct hci_ev_user_passkey_notify)),
7385 /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7386 HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7387 sizeof(struct hci_ev_keypress_notify)),
7388 /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7389 HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7390 sizeof(struct hci_ev_remote_host_features)),
7391 /* [0x3e = HCI_EV_LE_META] */
7392 HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7393 sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7394 /* [0xff = HCI_EV_VENDOR] */
7395 HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7396 };
7397
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)7398 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7399 u16 *opcode, u8 *status,
7400 hci_req_complete_t *req_complete,
7401 hci_req_complete_skb_t *req_complete_skb)
7402 {
7403 const struct hci_ev *ev = &hci_ev_table[event];
7404 void *data;
7405
7406 if (!ev->func)
7407 return;
7408
7409 if (skb->len < ev->min_len) {
7410 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7411 event, skb->len, ev->min_len);
7412 return;
7413 }
7414
7415 /* Just warn if the length is over max_len size it still be
7416 * possible to partially parse the event so leave to callback to
7417 * decide if that is acceptable.
7418 */
7419 if (skb->len > ev->max_len)
7420 bt_dev_warn_ratelimited(hdev,
7421 "unexpected event 0x%2.2x length: %u > %u",
7422 event, skb->len, ev->max_len);
7423
7424 data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7425 if (!data)
7426 return;
7427
7428 if (ev->req)
7429 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7430 req_complete_skb);
7431 else
7432 ev->func(hdev, data, skb);
7433 }
7434
hci_event_packet(struct hci_dev * hdev,struct sk_buff * skb)7435 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7436 {
7437 struct hci_event_hdr *hdr = (void *) skb->data;
7438 hci_req_complete_t req_complete = NULL;
7439 hci_req_complete_skb_t req_complete_skb = NULL;
7440 struct sk_buff *orig_skb = NULL;
7441 u8 status = 0, event, req_evt = 0;
7442 u16 opcode = HCI_OP_NOP;
7443
7444 if (skb->len < sizeof(*hdr)) {
7445 bt_dev_err(hdev, "Malformed HCI Event");
7446 goto done;
7447 }
7448
7449 kfree_skb(hdev->recv_event);
7450 hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7451
7452 event = hdr->evt;
7453 if (!event) {
7454 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7455 event);
7456 goto done;
7457 }
7458
7459 /* Only match event if command OGF is not for LE */
7460 if (hdev->req_skb &&
7461 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) != 0x08 &&
7462 hci_skb_event(hdev->req_skb) == event) {
7463 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->req_skb),
7464 status, &req_complete, &req_complete_skb);
7465 req_evt = event;
7466 }
7467
7468 /* If it looks like we might end up having to call
7469 * req_complete_skb, store a pristine copy of the skb since the
7470 * various handlers may modify the original one through
7471 * skb_pull() calls, etc.
7472 */
7473 if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7474 event == HCI_EV_CMD_COMPLETE)
7475 orig_skb = skb_clone(skb, GFP_KERNEL);
7476
7477 skb_pull(skb, HCI_EVENT_HDR_SIZE);
7478
7479 /* Store wake reason if we're suspended */
7480 hci_store_wake_reason(hdev, event, skb);
7481
7482 bt_dev_dbg(hdev, "event 0x%2.2x", event);
7483
7484 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7485 &req_complete_skb);
7486
7487 if (req_complete) {
7488 req_complete(hdev, status, opcode);
7489 } else if (req_complete_skb) {
7490 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7491 kfree_skb(orig_skb);
7492 orig_skb = NULL;
7493 }
7494 req_complete_skb(hdev, status, opcode, orig_skb);
7495 }
7496
7497 done:
7498 kfree_skb(orig_skb);
7499 kfree_skb(skb);
7500 hdev->stat.evt_rx++;
7501 }
7502