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_read_rssi(struct hci_dev * hdev,void * data,struct sk_buff * skb)2142 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data,
2143 struct sk_buff *skb)
2144 {
2145 struct hci_rp_read_rssi *rp = data;
2146 struct hci_conn *conn;
2147
2148 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2149
2150 if (rp->status)
2151 return rp->status;
2152
2153 hci_dev_lock(hdev);
2154
2155 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2156 if (conn)
2157 conn->rssi = rp->rssi;
2158
2159 hci_dev_unlock(hdev);
2160
2161 return rp->status;
2162 }
2163
hci_cc_read_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)2164 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data,
2165 struct sk_buff *skb)
2166 {
2167 struct hci_cp_read_tx_power *sent;
2168 struct hci_rp_read_tx_power *rp = data;
2169 struct hci_conn *conn;
2170
2171 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2172
2173 if (rp->status)
2174 return rp->status;
2175
2176 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
2177 if (!sent)
2178 return rp->status;
2179
2180 hci_dev_lock(hdev);
2181
2182 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2183 if (!conn)
2184 goto unlock;
2185
2186 switch (sent->type) {
2187 case 0x00:
2188 conn->tx_power = rp->tx_power;
2189 break;
2190 case 0x01:
2191 conn->max_tx_power = rp->tx_power;
2192 break;
2193 }
2194
2195 unlock:
2196 hci_dev_unlock(hdev);
2197 return rp->status;
2198 }
2199
hci_cc_write_ssp_debug_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)2200 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data,
2201 struct sk_buff *skb)
2202 {
2203 struct hci_ev_status *rp = data;
2204 u8 *mode;
2205
2206 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2207
2208 if (rp->status)
2209 return rp->status;
2210
2211 mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
2212 if (mode)
2213 hdev->ssp_debug_mode = *mode;
2214
2215 return rp->status;
2216 }
2217
hci_cs_inquiry(struct hci_dev * hdev,__u8 status)2218 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
2219 {
2220 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2221
2222 if (status)
2223 return;
2224
2225 if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
2226 set_bit(HCI_INQUIRY, &hdev->flags);
2227 }
2228
hci_cs_create_conn(struct hci_dev * hdev,__u8 status)2229 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
2230 {
2231 struct hci_cp_create_conn *cp;
2232 struct hci_conn *conn;
2233
2234 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2235
2236 cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
2237 if (!cp)
2238 return;
2239
2240 hci_dev_lock(hdev);
2241
2242 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2243
2244 bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn);
2245
2246 if (status) {
2247 if (conn && conn->state == BT_CONNECT) {
2248 conn->state = BT_CLOSED;
2249 hci_connect_cfm(conn, status);
2250 hci_conn_del(conn);
2251 }
2252 } else {
2253 if (!conn) {
2254 conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
2255 HCI_ROLE_MASTER);
2256 if (IS_ERR(conn))
2257 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
2258 }
2259 }
2260
2261 hci_dev_unlock(hdev);
2262 }
2263
hci_cs_add_sco(struct hci_dev * hdev,__u8 status)2264 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
2265 {
2266 struct hci_cp_add_sco *cp;
2267 struct hci_conn *acl;
2268 struct hci_link *link;
2269 __u16 handle;
2270
2271 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2272
2273 if (!status)
2274 return;
2275
2276 cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
2277 if (!cp)
2278 return;
2279
2280 handle = __le16_to_cpu(cp->handle);
2281
2282 bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
2283
2284 hci_dev_lock(hdev);
2285
2286 acl = hci_conn_hash_lookup_handle(hdev, handle);
2287 if (acl) {
2288 link = list_first_entry_or_null(&acl->link_list,
2289 struct hci_link, list);
2290 if (link && link->conn) {
2291 link->conn->state = BT_CLOSED;
2292
2293 hci_connect_cfm(link->conn, status);
2294 hci_conn_del(link->conn);
2295 }
2296 }
2297
2298 hci_dev_unlock(hdev);
2299 }
2300
hci_cs_auth_requested(struct hci_dev * hdev,__u8 status)2301 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
2302 {
2303 struct hci_cp_auth_requested *cp;
2304 struct hci_conn *conn;
2305
2306 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2307
2308 if (!status)
2309 return;
2310
2311 cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
2312 if (!cp)
2313 return;
2314
2315 hci_dev_lock(hdev);
2316
2317 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2318 if (conn) {
2319 if (conn->state == BT_CONFIG) {
2320 hci_connect_cfm(conn, status);
2321 hci_conn_drop(conn);
2322 }
2323 }
2324
2325 hci_dev_unlock(hdev);
2326 }
2327
hci_cs_set_conn_encrypt(struct hci_dev * hdev,__u8 status)2328 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
2329 {
2330 struct hci_cp_set_conn_encrypt *cp;
2331 struct hci_conn *conn;
2332
2333 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2334
2335 if (!status)
2336 return;
2337
2338 cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
2339 if (!cp)
2340 return;
2341
2342 hci_dev_lock(hdev);
2343
2344 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2345 if (conn) {
2346 if (conn->state == BT_CONFIG) {
2347 hci_connect_cfm(conn, status);
2348 hci_conn_drop(conn);
2349 }
2350 }
2351
2352 hci_dev_unlock(hdev);
2353 }
2354
hci_outgoing_auth_needed(struct hci_dev * hdev,struct hci_conn * conn)2355 static int hci_outgoing_auth_needed(struct hci_dev *hdev,
2356 struct hci_conn *conn)
2357 {
2358 if (conn->state != BT_CONFIG || !conn->out)
2359 return 0;
2360
2361 if (conn->pending_sec_level == BT_SECURITY_SDP)
2362 return 0;
2363
2364 /* Only request authentication for SSP connections or non-SSP
2365 * devices with sec_level MEDIUM or HIGH or if MITM protection
2366 * is requested.
2367 */
2368 if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
2369 conn->pending_sec_level != BT_SECURITY_FIPS &&
2370 conn->pending_sec_level != BT_SECURITY_HIGH &&
2371 conn->pending_sec_level != BT_SECURITY_MEDIUM)
2372 return 0;
2373
2374 return 1;
2375 }
2376
hci_resolve_name(struct hci_dev * hdev,struct inquiry_entry * e)2377 static int hci_resolve_name(struct hci_dev *hdev,
2378 struct inquiry_entry *e)
2379 {
2380 struct hci_cp_remote_name_req cp;
2381
2382 memset(&cp, 0, sizeof(cp));
2383
2384 bacpy(&cp.bdaddr, &e->data.bdaddr);
2385 cp.pscan_rep_mode = e->data.pscan_rep_mode;
2386 cp.pscan_mode = e->data.pscan_mode;
2387 cp.clock_offset = e->data.clock_offset;
2388
2389 return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
2390 }
2391
hci_resolve_next_name(struct hci_dev * hdev)2392 static bool hci_resolve_next_name(struct hci_dev *hdev)
2393 {
2394 struct discovery_state *discov = &hdev->discovery;
2395 struct inquiry_entry *e;
2396
2397 if (list_empty(&discov->resolve))
2398 return false;
2399
2400 /* We should stop if we already spent too much time resolving names. */
2401 if (time_after(jiffies, discov->name_resolve_timeout)) {
2402 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long.");
2403 return false;
2404 }
2405
2406 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2407 if (!e)
2408 return false;
2409
2410 if (hci_resolve_name(hdev, e) == 0) {
2411 e->name_state = NAME_PENDING;
2412 return true;
2413 }
2414
2415 return false;
2416 }
2417
hci_check_pending_name(struct hci_dev * hdev,struct hci_conn * conn,bdaddr_t * bdaddr,u8 * name,u8 name_len)2418 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
2419 bdaddr_t *bdaddr, u8 *name, u8 name_len)
2420 {
2421 struct discovery_state *discov = &hdev->discovery;
2422 struct inquiry_entry *e;
2423
2424 /* Update the mgmt connected state if necessary. Be careful with
2425 * conn objects that exist but are not (yet) connected however.
2426 * Only those in BT_CONFIG or BT_CONNECTED states can be
2427 * considered connected.
2428 */
2429 if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED))
2430 mgmt_device_connected(hdev, conn, name, name_len);
2431
2432 if (discov->state == DISCOVERY_STOPPED)
2433 return;
2434
2435 if (discov->state == DISCOVERY_STOPPING)
2436 goto discov_complete;
2437
2438 if (discov->state != DISCOVERY_RESOLVING)
2439 return;
2440
2441 e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
2442 /* If the device was not found in a list of found devices names of which
2443 * are pending. there is no need to continue resolving a next name as it
2444 * will be done upon receiving another Remote Name Request Complete
2445 * Event */
2446 if (!e)
2447 return;
2448
2449 list_del(&e->list);
2450
2451 e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN;
2452 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi,
2453 name, name_len);
2454
2455 if (hci_resolve_next_name(hdev))
2456 return;
2457
2458 discov_complete:
2459 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2460 }
2461
hci_cs_remote_name_req(struct hci_dev * hdev,__u8 status)2462 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
2463 {
2464 struct hci_cp_remote_name_req *cp;
2465 struct hci_conn *conn;
2466
2467 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2468
2469 /* If successful wait for the name req complete event before
2470 * checking for the need to do authentication */
2471 if (!status)
2472 return;
2473
2474 cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
2475 if (!cp)
2476 return;
2477
2478 hci_dev_lock(hdev);
2479
2480 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2481
2482 if (hci_dev_test_flag(hdev, HCI_MGMT))
2483 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
2484
2485 if (!conn)
2486 goto unlock;
2487
2488 if (!hci_outgoing_auth_needed(hdev, conn))
2489 goto unlock;
2490
2491 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2492 struct hci_cp_auth_requested auth_cp;
2493
2494 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2495
2496 auth_cp.handle = __cpu_to_le16(conn->handle);
2497 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
2498 sizeof(auth_cp), &auth_cp);
2499 }
2500
2501 unlock:
2502 hci_dev_unlock(hdev);
2503 }
2504
hci_cs_read_remote_features(struct hci_dev * hdev,__u8 status)2505 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
2506 {
2507 struct hci_cp_read_remote_features *cp;
2508 struct hci_conn *conn;
2509
2510 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2511
2512 if (!status)
2513 return;
2514
2515 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
2516 if (!cp)
2517 return;
2518
2519 hci_dev_lock(hdev);
2520
2521 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2522 if (conn) {
2523 if (conn->state == BT_CONFIG) {
2524 hci_connect_cfm(conn, status);
2525 hci_conn_drop(conn);
2526 }
2527 }
2528
2529 hci_dev_unlock(hdev);
2530 }
2531
hci_cs_read_remote_ext_features(struct hci_dev * hdev,__u8 status)2532 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
2533 {
2534 struct hci_cp_read_remote_ext_features *cp;
2535 struct hci_conn *conn;
2536
2537 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2538
2539 if (!status)
2540 return;
2541
2542 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
2543 if (!cp)
2544 return;
2545
2546 hci_dev_lock(hdev);
2547
2548 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2549 if (conn) {
2550 if (conn->state == BT_CONFIG) {
2551 hci_connect_cfm(conn, status);
2552 hci_conn_drop(conn);
2553 }
2554 }
2555
2556 hci_dev_unlock(hdev);
2557 }
2558
hci_setup_sync_conn_status(struct hci_dev * hdev,__u16 handle,__u8 status)2559 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle,
2560 __u8 status)
2561 {
2562 struct hci_conn *acl;
2563 struct hci_link *link;
2564
2565 bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status);
2566
2567 hci_dev_lock(hdev);
2568
2569 acl = hci_conn_hash_lookup_handle(hdev, handle);
2570 if (acl) {
2571 link = list_first_entry_or_null(&acl->link_list,
2572 struct hci_link, list);
2573 if (link && link->conn) {
2574 link->conn->state = BT_CLOSED;
2575
2576 hci_connect_cfm(link->conn, status);
2577 hci_conn_del(link->conn);
2578 }
2579 }
2580
2581 hci_dev_unlock(hdev);
2582 }
2583
hci_cs_setup_sync_conn(struct hci_dev * hdev,__u8 status)2584 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2585 {
2586 struct hci_cp_setup_sync_conn *cp;
2587
2588 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2589
2590 if (!status)
2591 return;
2592
2593 cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
2594 if (!cp)
2595 return;
2596
2597 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2598 }
2599
hci_cs_enhanced_setup_sync_conn(struct hci_dev * hdev,__u8 status)2600 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2601 {
2602 struct hci_cp_enhanced_setup_sync_conn *cp;
2603
2604 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2605
2606 if (!status)
2607 return;
2608
2609 cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN);
2610 if (!cp)
2611 return;
2612
2613 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2614 }
2615
hci_cs_sniff_mode(struct hci_dev * hdev,__u8 status)2616 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
2617 {
2618 struct hci_cp_sniff_mode *cp;
2619 struct hci_conn *conn;
2620
2621 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2622
2623 if (!status)
2624 return;
2625
2626 cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
2627 if (!cp)
2628 return;
2629
2630 hci_dev_lock(hdev);
2631
2632 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2633 if (conn) {
2634 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2635
2636 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2637 hci_sco_setup(conn, status);
2638 }
2639
2640 hci_dev_unlock(hdev);
2641 }
2642
hci_cs_exit_sniff_mode(struct hci_dev * hdev,__u8 status)2643 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
2644 {
2645 struct hci_cp_exit_sniff_mode *cp;
2646 struct hci_conn *conn;
2647
2648 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2649
2650 if (!status)
2651 return;
2652
2653 cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
2654 if (!cp)
2655 return;
2656
2657 hci_dev_lock(hdev);
2658
2659 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2660 if (conn) {
2661 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2662
2663 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2664 hci_sco_setup(conn, status);
2665 }
2666
2667 hci_dev_unlock(hdev);
2668 }
2669
hci_cs_disconnect(struct hci_dev * hdev,u8 status)2670 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
2671 {
2672 struct hci_cp_disconnect *cp;
2673 struct hci_conn_params *params;
2674 struct hci_conn *conn;
2675 bool mgmt_conn;
2676
2677 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2678
2679 /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
2680 * otherwise cleanup the connection immediately.
2681 */
2682 if (!status && !hdev->suspended)
2683 return;
2684
2685 cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
2686 if (!cp)
2687 return;
2688
2689 hci_dev_lock(hdev);
2690
2691 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2692 if (!conn)
2693 goto unlock;
2694
2695 if (status) {
2696 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2697 conn->dst_type, status);
2698
2699 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
2700 hdev->cur_adv_instance = conn->adv_instance;
2701 hci_enable_advertising(hdev);
2702 }
2703
2704 /* Inform sockets conn is gone before we delete it */
2705 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED);
2706
2707 goto done;
2708 }
2709
2710 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
2711
2712 if (conn->type == ACL_LINK) {
2713 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
2714 hci_remove_link_key(hdev, &conn->dst);
2715 }
2716
2717 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
2718 if (params) {
2719 switch (params->auto_connect) {
2720 case HCI_AUTO_CONN_LINK_LOSS:
2721 if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT)
2722 break;
2723 fallthrough;
2724
2725 case HCI_AUTO_CONN_DIRECT:
2726 case HCI_AUTO_CONN_ALWAYS:
2727 hci_pend_le_list_del_init(params);
2728 hci_pend_le_list_add(params, &hdev->pend_le_conns);
2729 break;
2730
2731 default:
2732 break;
2733 }
2734 }
2735
2736 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
2737 cp->reason, mgmt_conn);
2738
2739 hci_disconn_cfm(conn, cp->reason);
2740
2741 done:
2742 /* If the disconnection failed for any reason, the upper layer
2743 * does not retry to disconnect in current implementation.
2744 * Hence, we need to do some basic cleanup here and re-enable
2745 * advertising if necessary.
2746 */
2747 hci_conn_del(conn);
2748 unlock:
2749 hci_dev_unlock(hdev);
2750 }
2751
ev_bdaddr_type(struct hci_dev * hdev,u8 type,bool * resolved)2752 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved)
2753 {
2754 /* When using controller based address resolution, then the new
2755 * address types 0x02 and 0x03 are used. These types need to be
2756 * converted back into either public address or random address type
2757 */
2758 switch (type) {
2759 case ADDR_LE_DEV_PUBLIC_RESOLVED:
2760 if (resolved)
2761 *resolved = true;
2762 return ADDR_LE_DEV_PUBLIC;
2763 case ADDR_LE_DEV_RANDOM_RESOLVED:
2764 if (resolved)
2765 *resolved = true;
2766 return ADDR_LE_DEV_RANDOM;
2767 }
2768
2769 if (resolved)
2770 *resolved = false;
2771 return type;
2772 }
2773
cs_le_create_conn(struct hci_dev * hdev,bdaddr_t * peer_addr,u8 peer_addr_type,u8 own_address_type,u8 filter_policy)2774 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
2775 u8 peer_addr_type, u8 own_address_type,
2776 u8 filter_policy)
2777 {
2778 struct hci_conn *conn;
2779
2780 conn = hci_conn_hash_lookup_le(hdev, peer_addr,
2781 peer_addr_type);
2782 if (!conn)
2783 return;
2784
2785 own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL);
2786
2787 /* Store the initiator and responder address information which
2788 * is needed for SMP. These values will not change during the
2789 * lifetime of the connection.
2790 */
2791 conn->init_addr_type = own_address_type;
2792 if (own_address_type == ADDR_LE_DEV_RANDOM)
2793 bacpy(&conn->init_addr, &hdev->random_addr);
2794 else
2795 bacpy(&conn->init_addr, &hdev->bdaddr);
2796
2797 conn->resp_addr_type = peer_addr_type;
2798 bacpy(&conn->resp_addr, peer_addr);
2799 }
2800
hci_cs_le_create_conn(struct hci_dev * hdev,u8 status)2801 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
2802 {
2803 struct hci_cp_le_create_conn *cp;
2804
2805 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2806
2807 /* All connection failure handling is taken care of by the
2808 * hci_conn_failed function which is triggered by the HCI
2809 * request completion callbacks used for connecting.
2810 */
2811 if (status)
2812 return;
2813
2814 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
2815 if (!cp)
2816 return;
2817
2818 hci_dev_lock(hdev);
2819
2820 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2821 cp->own_address_type, cp->filter_policy);
2822
2823 hci_dev_unlock(hdev);
2824 }
2825
hci_cs_le_ext_create_conn(struct hci_dev * hdev,u8 status)2826 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
2827 {
2828 struct hci_cp_le_ext_create_conn *cp;
2829
2830 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2831
2832 /* All connection failure handling is taken care of by the
2833 * hci_conn_failed function which is triggered by the HCI
2834 * request completion callbacks used for connecting.
2835 */
2836 if (status)
2837 return;
2838
2839 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
2840 if (!cp)
2841 return;
2842
2843 hci_dev_lock(hdev);
2844
2845 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2846 cp->own_addr_type, cp->filter_policy);
2847
2848 hci_dev_unlock(hdev);
2849 }
2850
hci_cs_le_read_remote_features(struct hci_dev * hdev,u8 status)2851 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
2852 {
2853 struct hci_cp_le_read_remote_features *cp;
2854 struct hci_conn *conn;
2855
2856 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2857
2858 if (!status)
2859 return;
2860
2861 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
2862 if (!cp)
2863 return;
2864
2865 hci_dev_lock(hdev);
2866
2867 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2868 if (conn) {
2869 if (conn->state == BT_CONFIG) {
2870 hci_connect_cfm(conn, status);
2871 hci_conn_drop(conn);
2872 }
2873 }
2874
2875 hci_dev_unlock(hdev);
2876 }
2877
hci_cs_le_start_enc(struct hci_dev * hdev,u8 status)2878 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
2879 {
2880 struct hci_cp_le_start_enc *cp;
2881 struct hci_conn *conn;
2882
2883 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2884
2885 if (!status)
2886 return;
2887
2888 hci_dev_lock(hdev);
2889
2890 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
2891 if (!cp)
2892 goto unlock;
2893
2894 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2895 if (!conn)
2896 goto unlock;
2897
2898 if (conn->state != BT_CONNECTED)
2899 goto unlock;
2900
2901 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
2902 hci_conn_drop(conn);
2903
2904 unlock:
2905 hci_dev_unlock(hdev);
2906 }
2907
hci_cs_switch_role(struct hci_dev * hdev,u8 status)2908 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
2909 {
2910 struct hci_cp_switch_role *cp;
2911 struct hci_conn *conn;
2912
2913 BT_DBG("%s status 0x%2.2x", hdev->name, status);
2914
2915 if (!status)
2916 return;
2917
2918 cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
2919 if (!cp)
2920 return;
2921
2922 hci_dev_lock(hdev);
2923
2924 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2925 if (conn)
2926 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
2927
2928 hci_dev_unlock(hdev);
2929 }
2930
hci_inquiry_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)2931 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data,
2932 struct sk_buff *skb)
2933 {
2934 struct hci_ev_status *ev = data;
2935 struct discovery_state *discov = &hdev->discovery;
2936 struct inquiry_entry *e;
2937
2938 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
2939
2940 if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
2941 return;
2942
2943 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
2944 wake_up_bit(&hdev->flags, HCI_INQUIRY);
2945
2946 if (!hci_dev_test_flag(hdev, HCI_MGMT))
2947 return;
2948
2949 hci_dev_lock(hdev);
2950
2951 if (discov->state != DISCOVERY_FINDING)
2952 goto unlock;
2953
2954 if (list_empty(&discov->resolve)) {
2955 /* When BR/EDR inquiry is active and no LE scanning is in
2956 * progress, then change discovery state to indicate completion.
2957 *
2958 * When running LE scanning and BR/EDR inquiry simultaneously
2959 * and the LE scan already finished, then change the discovery
2960 * state to indicate completion.
2961 */
2962 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2963 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
2964 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2965 goto unlock;
2966 }
2967
2968 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2969 if (e && hci_resolve_name(hdev, e) == 0) {
2970 e->name_state = NAME_PENDING;
2971 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
2972 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION;
2973 } else {
2974 /* When BR/EDR inquiry is active and no LE scanning is in
2975 * progress, then change discovery state to indicate completion.
2976 *
2977 * When running LE scanning and BR/EDR inquiry simultaneously
2978 * and the LE scan already finished, then change the discovery
2979 * state to indicate completion.
2980 */
2981 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2982 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
2983 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2984 }
2985
2986 unlock:
2987 hci_dev_unlock(hdev);
2988 }
2989
hci_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)2990 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata,
2991 struct sk_buff *skb)
2992 {
2993 struct hci_ev_inquiry_result *ev = edata;
2994 struct inquiry_data data;
2995 int i;
2996
2997 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT,
2998 flex_array_size(ev, info, ev->num)))
2999 return;
3000
3001 bt_dev_dbg(hdev, "num %d", ev->num);
3002
3003 if (!ev->num)
3004 return;
3005
3006 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
3007 return;
3008
3009 hci_dev_lock(hdev);
3010
3011 for (i = 0; i < ev->num; i++) {
3012 struct inquiry_info *info = &ev->info[i];
3013 u32 flags;
3014
3015 bacpy(&data.bdaddr, &info->bdaddr);
3016 data.pscan_rep_mode = info->pscan_rep_mode;
3017 data.pscan_period_mode = info->pscan_period_mode;
3018 data.pscan_mode = info->pscan_mode;
3019 memcpy(data.dev_class, info->dev_class, 3);
3020 data.clock_offset = info->clock_offset;
3021 data.rssi = HCI_RSSI_INVALID;
3022 data.ssp_mode = 0x00;
3023
3024 flags = hci_inquiry_cache_update(hdev, &data, false);
3025
3026 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3027 info->dev_class, HCI_RSSI_INVALID,
3028 flags, NULL, 0, NULL, 0, 0);
3029 }
3030
3031 hci_dev_unlock(hdev);
3032 }
3033
hci_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3034 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
3035 struct sk_buff *skb)
3036 {
3037 struct hci_ev_conn_complete *ev = data;
3038 struct hci_conn *conn;
3039 u8 status = ev->status;
3040
3041 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3042
3043 hci_dev_lock(hdev);
3044
3045 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
3046 if (!conn) {
3047 /* In case of error status and there is no connection pending
3048 * just unlock as there is nothing to cleanup.
3049 */
3050 if (ev->status)
3051 goto unlock;
3052
3053 /* Connection may not exist if auto-connected. Check the bredr
3054 * allowlist to see if this device is allowed to auto connect.
3055 * If link is an ACL type, create a connection class
3056 * automatically.
3057 *
3058 * Auto-connect will only occur if the event filter is
3059 * programmed with a given address. Right now, event filter is
3060 * only used during suspend.
3061 */
3062 if (ev->link_type == ACL_LINK &&
3063 hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
3064 &ev->bdaddr,
3065 BDADDR_BREDR)) {
3066 conn = hci_conn_add_unset(hdev, ev->link_type,
3067 &ev->bdaddr, HCI_ROLE_SLAVE);
3068 if (IS_ERR(conn)) {
3069 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3070 goto unlock;
3071 }
3072 } else {
3073 if (ev->link_type != SCO_LINK)
3074 goto unlock;
3075
3076 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK,
3077 &ev->bdaddr);
3078 if (!conn)
3079 goto unlock;
3080
3081 conn->type = SCO_LINK;
3082 }
3083 }
3084
3085 /* The HCI_Connection_Complete event is only sent once per connection.
3086 * Processing it more than once per connection can corrupt kernel memory.
3087 *
3088 * As the connection handle is set here for the first time, it indicates
3089 * whether the connection is already set up.
3090 */
3091 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
3092 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
3093 goto unlock;
3094 }
3095
3096 if (!status) {
3097 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
3098 if (status)
3099 goto done;
3100
3101 if (conn->type == ACL_LINK) {
3102 conn->state = BT_CONFIG;
3103 hci_conn_hold(conn);
3104
3105 if (!conn->out && !hci_conn_ssp_enabled(conn) &&
3106 !hci_find_link_key(hdev, &ev->bdaddr))
3107 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
3108 else
3109 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3110 } else
3111 conn->state = BT_CONNECTED;
3112
3113 hci_debugfs_create_conn(conn);
3114 hci_conn_add_sysfs(conn);
3115
3116 if (test_bit(HCI_AUTH, &hdev->flags))
3117 set_bit(HCI_CONN_AUTH, &conn->flags);
3118
3119 if (test_bit(HCI_ENCRYPT, &hdev->flags))
3120 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3121
3122 /* "Link key request" completed ahead of "connect request" completes */
3123 if (ev->encr_mode == 1 && !test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3124 ev->link_type == ACL_LINK) {
3125 struct link_key *key;
3126 struct hci_cp_read_enc_key_size cp;
3127
3128 key = hci_find_link_key(hdev, &ev->bdaddr);
3129 if (key) {
3130 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3131
3132 if (!read_key_size_capable(hdev)) {
3133 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3134 } else {
3135 cp.handle = cpu_to_le16(conn->handle);
3136 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3137 sizeof(cp), &cp)) {
3138 bt_dev_err(hdev, "sending read key size failed");
3139 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3140 }
3141 }
3142
3143 hci_encrypt_cfm(conn, ev->status);
3144 }
3145 }
3146
3147 /* Get remote features */
3148 if (conn->type == ACL_LINK) {
3149 struct hci_cp_read_remote_features cp;
3150 cp.handle = ev->handle;
3151 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
3152 sizeof(cp), &cp);
3153
3154 hci_update_scan(hdev);
3155 }
3156
3157 /* Set packet type for incoming connection */
3158 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
3159 struct hci_cp_change_conn_ptype cp;
3160 cp.handle = ev->handle;
3161 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3162 hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
3163 &cp);
3164 }
3165 }
3166
3167 if (conn->type == ACL_LINK)
3168 hci_sco_setup(conn, ev->status);
3169
3170 done:
3171 if (status) {
3172 hci_conn_failed(conn, status);
3173 } else if (ev->link_type == SCO_LINK) {
3174 switch (conn->setting & SCO_AIRMODE_MASK) {
3175 case SCO_AIRMODE_CVSD:
3176 if (hdev->notify)
3177 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
3178 break;
3179 }
3180
3181 hci_connect_cfm(conn, status);
3182 }
3183
3184 unlock:
3185 hci_dev_unlock(hdev);
3186 }
3187
hci_reject_conn(struct hci_dev * hdev,bdaddr_t * bdaddr)3188 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
3189 {
3190 struct hci_cp_reject_conn_req cp;
3191
3192 bacpy(&cp.bdaddr, bdaddr);
3193 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
3194 hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
3195 }
3196
hci_conn_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3197 static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
3198 struct sk_buff *skb)
3199 {
3200 struct hci_ev_conn_request *ev = data;
3201 int mask = hdev->link_mode;
3202 struct inquiry_entry *ie;
3203 struct hci_conn *conn;
3204 __u8 flags = 0;
3205
3206 bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type);
3207
3208 /* Reject incoming connection from device with same BD ADDR against
3209 * CVE-2020-26555
3210 */
3211 if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
3212 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
3213 &ev->bdaddr);
3214 hci_reject_conn(hdev, &ev->bdaddr);
3215 return;
3216 }
3217
3218 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
3219 &flags);
3220
3221 if (!(mask & HCI_LM_ACCEPT)) {
3222 hci_reject_conn(hdev, &ev->bdaddr);
3223 return;
3224 }
3225
3226 hci_dev_lock(hdev);
3227
3228 if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
3229 BDADDR_BREDR)) {
3230 hci_reject_conn(hdev, &ev->bdaddr);
3231 goto unlock;
3232 }
3233
3234 /* Require HCI_CONNECTABLE or an accept list entry to accept the
3235 * connection. These features are only touched through mgmt so
3236 * only do the checks if HCI_MGMT is set.
3237 */
3238 if (hci_dev_test_flag(hdev, HCI_MGMT) &&
3239 !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
3240 !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
3241 BDADDR_BREDR)) {
3242 hci_reject_conn(hdev, &ev->bdaddr);
3243 goto unlock;
3244 }
3245
3246 /* Connection accepted */
3247
3248 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3249 if (ie)
3250 memcpy(ie->data.dev_class, ev->dev_class, 3);
3251
3252 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
3253 &ev->bdaddr);
3254 if (!conn) {
3255 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr,
3256 HCI_ROLE_SLAVE);
3257 if (IS_ERR(conn)) {
3258 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3259 goto unlock;
3260 }
3261 }
3262
3263 memcpy(conn->dev_class, ev->dev_class, 3);
3264
3265 hci_dev_unlock(hdev);
3266
3267 if (ev->link_type == ACL_LINK ||
3268 (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
3269 struct hci_cp_accept_conn_req cp;
3270 conn->state = BT_CONNECT;
3271
3272 bacpy(&cp.bdaddr, &ev->bdaddr);
3273
3274 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
3275 cp.role = 0x00; /* Become central */
3276 else
3277 cp.role = 0x01; /* Remain peripheral */
3278
3279 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
3280 } else if (!(flags & HCI_PROTO_DEFER)) {
3281 struct hci_cp_accept_sync_conn_req cp;
3282 conn->state = BT_CONNECT;
3283
3284 bacpy(&cp.bdaddr, &ev->bdaddr);
3285 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3286
3287 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
3288 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
3289 cp.max_latency = cpu_to_le16(0xffff);
3290 cp.content_format = cpu_to_le16(hdev->voice_setting);
3291 cp.retrans_effort = 0xff;
3292
3293 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
3294 &cp);
3295 } else {
3296 conn->state = BT_CONNECT2;
3297 hci_connect_cfm(conn, 0);
3298 }
3299
3300 return;
3301 unlock:
3302 hci_dev_unlock(hdev);
3303 }
3304
hci_to_mgmt_reason(u8 err)3305 static u8 hci_to_mgmt_reason(u8 err)
3306 {
3307 switch (err) {
3308 case HCI_ERROR_CONNECTION_TIMEOUT:
3309 return MGMT_DEV_DISCONN_TIMEOUT;
3310 case HCI_ERROR_REMOTE_USER_TERM:
3311 case HCI_ERROR_REMOTE_LOW_RESOURCES:
3312 case HCI_ERROR_REMOTE_POWER_OFF:
3313 return MGMT_DEV_DISCONN_REMOTE;
3314 case HCI_ERROR_LOCAL_HOST_TERM:
3315 return MGMT_DEV_DISCONN_LOCAL_HOST;
3316 default:
3317 return MGMT_DEV_DISCONN_UNKNOWN;
3318 }
3319 }
3320
hci_disconn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3321 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
3322 struct sk_buff *skb)
3323 {
3324 struct hci_ev_disconn_complete *ev = data;
3325 u8 reason;
3326 struct hci_conn_params *params;
3327 struct hci_conn *conn;
3328 bool mgmt_connected;
3329
3330 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3331
3332 hci_dev_lock(hdev);
3333
3334 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3335 if (!conn)
3336 goto unlock;
3337
3338 if (ev->status) {
3339 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
3340 conn->dst_type, ev->status);
3341 goto unlock;
3342 }
3343
3344 conn->state = BT_CLOSED;
3345
3346 mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
3347
3348 if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
3349 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
3350 else
3351 reason = hci_to_mgmt_reason(ev->reason);
3352
3353 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
3354 reason, mgmt_connected);
3355
3356 if (conn->type == ACL_LINK) {
3357 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
3358 hci_remove_link_key(hdev, &conn->dst);
3359
3360 hci_update_scan(hdev);
3361 }
3362
3363 /* Re-enable passive scanning if disconnected device is marked
3364 * as auto-connectable.
3365 */
3366 if (conn->type == LE_LINK) {
3367 params = hci_conn_params_lookup(hdev, &conn->dst,
3368 conn->dst_type);
3369 if (params) {
3370 switch (params->auto_connect) {
3371 case HCI_AUTO_CONN_LINK_LOSS:
3372 if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
3373 break;
3374 fallthrough;
3375
3376 case HCI_AUTO_CONN_DIRECT:
3377 case HCI_AUTO_CONN_ALWAYS:
3378 hci_pend_le_list_del_init(params);
3379 hci_pend_le_list_add(params,
3380 &hdev->pend_le_conns);
3381 hci_update_passive_scan(hdev);
3382 break;
3383
3384 default:
3385 break;
3386 }
3387 }
3388 }
3389
3390 hci_disconn_cfm(conn, ev->reason);
3391
3392 /* Re-enable advertising if necessary, since it might
3393 * have been disabled by the connection. From the
3394 * HCI_LE_Set_Advertise_Enable command description in
3395 * the core specification (v4.0):
3396 * "The Controller shall continue advertising until the Host
3397 * issues an LE_Set_Advertise_Enable command with
3398 * Advertising_Enable set to 0x00 (Advertising is disabled)
3399 * or until a connection is created or until the Advertising
3400 * is timed out due to Directed Advertising."
3401 */
3402 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
3403 hdev->cur_adv_instance = conn->adv_instance;
3404 hci_enable_advertising(hdev);
3405 }
3406
3407 hci_conn_del(conn);
3408
3409 unlock:
3410 hci_dev_unlock(hdev);
3411 }
3412
hci_auth_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3413 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data,
3414 struct sk_buff *skb)
3415 {
3416 struct hci_ev_auth_complete *ev = data;
3417 struct hci_conn *conn;
3418
3419 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3420
3421 hci_dev_lock(hdev);
3422
3423 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3424 if (!conn)
3425 goto unlock;
3426
3427 if (!ev->status) {
3428 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3429 set_bit(HCI_CONN_AUTH, &conn->flags);
3430 conn->sec_level = conn->pending_sec_level;
3431 } else {
3432 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3433 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3434
3435 mgmt_auth_failed(conn, ev->status);
3436 }
3437
3438 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3439
3440 if (conn->state == BT_CONFIG) {
3441 if (!ev->status && hci_conn_ssp_enabled(conn)) {
3442 struct hci_cp_set_conn_encrypt cp;
3443 cp.handle = ev->handle;
3444 cp.encrypt = 0x01;
3445 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3446 &cp);
3447 } else {
3448 conn->state = BT_CONNECTED;
3449 hci_connect_cfm(conn, ev->status);
3450 hci_conn_drop(conn);
3451 }
3452 } else {
3453 hci_auth_cfm(conn, ev->status);
3454
3455 hci_conn_hold(conn);
3456 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3457 hci_conn_drop(conn);
3458 }
3459
3460 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
3461 if (!ev->status) {
3462 struct hci_cp_set_conn_encrypt cp;
3463 cp.handle = ev->handle;
3464 cp.encrypt = 0x01;
3465 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3466 &cp);
3467 } else {
3468 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3469 hci_encrypt_cfm(conn, ev->status);
3470 }
3471 }
3472
3473 unlock:
3474 hci_dev_unlock(hdev);
3475 }
3476
hci_remote_name_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3477 static void hci_remote_name_evt(struct hci_dev *hdev, void *data,
3478 struct sk_buff *skb)
3479 {
3480 struct hci_ev_remote_name *ev = data;
3481 struct hci_conn *conn;
3482
3483 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3484
3485 hci_dev_lock(hdev);
3486
3487 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3488
3489 if (!hci_dev_test_flag(hdev, HCI_MGMT))
3490 goto check_auth;
3491
3492 if (ev->status == 0)
3493 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
3494 strnlen(ev->name, HCI_MAX_NAME_LENGTH));
3495 else
3496 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
3497
3498 check_auth:
3499 if (!conn)
3500 goto unlock;
3501
3502 if (!hci_outgoing_auth_needed(hdev, conn))
3503 goto unlock;
3504
3505 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
3506 struct hci_cp_auth_requested cp;
3507
3508 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
3509
3510 cp.handle = __cpu_to_le16(conn->handle);
3511 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
3512 }
3513
3514 unlock:
3515 hci_dev_unlock(hdev);
3516 }
3517
hci_encrypt_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3518 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data,
3519 struct sk_buff *skb)
3520 {
3521 struct hci_ev_encrypt_change *ev = data;
3522 struct hci_conn *conn;
3523
3524 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3525
3526 hci_dev_lock(hdev);
3527
3528 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3529 if (!conn)
3530 goto unlock;
3531
3532 if (!ev->status) {
3533 if (ev->encrypt) {
3534 /* Encryption implies authentication */
3535 set_bit(HCI_CONN_AUTH, &conn->flags);
3536 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3537 conn->sec_level = conn->pending_sec_level;
3538
3539 /* P-256 authentication key implies FIPS */
3540 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
3541 set_bit(HCI_CONN_FIPS, &conn->flags);
3542
3543 if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
3544 conn->type == LE_LINK)
3545 set_bit(HCI_CONN_AES_CCM, &conn->flags);
3546 } else {
3547 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
3548 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
3549 }
3550 }
3551
3552 /* We should disregard the current RPA and generate a new one
3553 * whenever the encryption procedure fails.
3554 */
3555 if (ev->status && conn->type == LE_LINK) {
3556 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
3557 hci_adv_instances_set_rpa_expired(hdev, true);
3558 }
3559
3560 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3561
3562 /* Check link security requirements are met */
3563 if (!hci_conn_check_link_mode(conn))
3564 ev->status = HCI_ERROR_AUTH_FAILURE;
3565
3566 if (ev->status && conn->state == BT_CONNECTED) {
3567 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3568 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3569
3570 /* Notify upper layers so they can cleanup before
3571 * disconnecting.
3572 */
3573 hci_encrypt_cfm(conn, ev->status);
3574 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
3575 hci_conn_drop(conn);
3576 goto unlock;
3577 }
3578
3579 /* Try reading the encryption key size for encrypted ACL links */
3580 if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
3581 struct hci_cp_read_enc_key_size cp;
3582
3583 /* Only send HCI_Read_Encryption_Key_Size if the
3584 * controller really supports it. If it doesn't, assume
3585 * the default size (16).
3586 */
3587 if (!read_key_size_capable(hdev)) {
3588 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3589 goto notify;
3590 }
3591
3592 cp.handle = cpu_to_le16(conn->handle);
3593 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3594 sizeof(cp), &cp)) {
3595 bt_dev_err(hdev, "sending read key size failed");
3596 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3597 goto notify;
3598 }
3599
3600 goto unlock;
3601 }
3602
3603 /* We skip the WRITE_AUTH_PAYLOAD_TIMEOUT for ATS2851 based controllers
3604 * to avoid unexpected SMP command errors when pairing.
3605 */
3606 if (test_bit(HCI_QUIRK_BROKEN_WRITE_AUTH_PAYLOAD_TIMEOUT,
3607 &hdev->quirks))
3608 goto notify;
3609
3610 /* Set the default Authenticated Payload Timeout after
3611 * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
3612 * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
3613 * sent when the link is active and Encryption is enabled, the conn
3614 * type can be either LE or ACL and controller must support LMP Ping.
3615 * Ensure for AES-CCM encryption as well.
3616 */
3617 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3618 test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
3619 ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
3620 (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
3621 struct hci_cp_write_auth_payload_to cp;
3622
3623 cp.handle = cpu_to_le16(conn->handle);
3624 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
3625 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
3626 sizeof(cp), &cp))
3627 bt_dev_err(hdev, "write auth payload timeout failed");
3628 }
3629
3630 notify:
3631 hci_encrypt_cfm(conn, ev->status);
3632
3633 unlock:
3634 hci_dev_unlock(hdev);
3635 }
3636
hci_change_link_key_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3637 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data,
3638 struct sk_buff *skb)
3639 {
3640 struct hci_ev_change_link_key_complete *ev = data;
3641 struct hci_conn *conn;
3642
3643 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3644
3645 hci_dev_lock(hdev);
3646
3647 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3648 if (conn) {
3649 if (!ev->status)
3650 set_bit(HCI_CONN_SECURE, &conn->flags);
3651
3652 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3653
3654 hci_key_change_cfm(conn, ev->status);
3655 }
3656
3657 hci_dev_unlock(hdev);
3658 }
3659
hci_remote_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3660 static void hci_remote_features_evt(struct hci_dev *hdev, void *data,
3661 struct sk_buff *skb)
3662 {
3663 struct hci_ev_remote_features *ev = data;
3664 struct hci_conn *conn;
3665
3666 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3667
3668 hci_dev_lock(hdev);
3669
3670 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3671 if (!conn)
3672 goto unlock;
3673
3674 if (!ev->status)
3675 memcpy(conn->features[0], ev->features, 8);
3676
3677 if (conn->state != BT_CONFIG)
3678 goto unlock;
3679
3680 if (!ev->status && lmp_ext_feat_capable(hdev) &&
3681 lmp_ext_feat_capable(conn)) {
3682 struct hci_cp_read_remote_ext_features cp;
3683 cp.handle = ev->handle;
3684 cp.page = 0x01;
3685 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
3686 sizeof(cp), &cp);
3687 goto unlock;
3688 }
3689
3690 if (!ev->status) {
3691 struct hci_cp_remote_name_req cp;
3692 memset(&cp, 0, sizeof(cp));
3693 bacpy(&cp.bdaddr, &conn->dst);
3694 cp.pscan_rep_mode = 0x02;
3695 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
3696 } else {
3697 mgmt_device_connected(hdev, conn, NULL, 0);
3698 }
3699
3700 if (!hci_outgoing_auth_needed(hdev, conn)) {
3701 conn->state = BT_CONNECTED;
3702 hci_connect_cfm(conn, ev->status);
3703 hci_conn_drop(conn);
3704 }
3705
3706 unlock:
3707 hci_dev_unlock(hdev);
3708 }
3709
handle_cmd_cnt_and_timer(struct hci_dev * hdev,u8 ncmd)3710 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd)
3711 {
3712 cancel_delayed_work(&hdev->cmd_timer);
3713
3714 rcu_read_lock();
3715 if (!test_bit(HCI_RESET, &hdev->flags)) {
3716 if (ncmd) {
3717 cancel_delayed_work(&hdev->ncmd_timer);
3718 atomic_set(&hdev->cmd_cnt, 1);
3719 } else {
3720 if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
3721 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer,
3722 HCI_NCMD_TIMEOUT);
3723 }
3724 }
3725 rcu_read_unlock();
3726 }
3727
hci_cc_le_read_buffer_size_v2(struct hci_dev * hdev,void * data,struct sk_buff * skb)3728 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data,
3729 struct sk_buff *skb)
3730 {
3731 struct hci_rp_le_read_buffer_size_v2 *rp = data;
3732
3733 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3734
3735 if (rp->status)
3736 return rp->status;
3737
3738 hdev->le_mtu = __le16_to_cpu(rp->acl_mtu);
3739 hdev->le_pkts = rp->acl_max_pkt;
3740 hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu);
3741 hdev->iso_pkts = rp->iso_max_pkt;
3742
3743 hdev->le_cnt = hdev->le_pkts;
3744 hdev->iso_cnt = hdev->iso_pkts;
3745
3746 BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
3747 hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
3748
3749 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
3750 return HCI_ERROR_INVALID_PARAMETERS;
3751
3752 return rp->status;
3753 }
3754
hci_unbound_cis_failed(struct hci_dev * hdev,u8 cig,u8 status)3755 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status)
3756 {
3757 struct hci_conn *conn, *tmp;
3758
3759 lockdep_assert_held(&hdev->lock);
3760
3761 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
3762 if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY) ||
3763 conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig)
3764 continue;
3765
3766 if (HCI_CONN_HANDLE_UNSET(conn->handle))
3767 hci_conn_failed(conn, status);
3768 }
3769 }
3770
hci_cc_le_set_cig_params(struct hci_dev * hdev,void * data,struct sk_buff * skb)3771 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
3772 struct sk_buff *skb)
3773 {
3774 struct hci_rp_le_set_cig_params *rp = data;
3775 struct hci_cp_le_set_cig_params *cp;
3776 struct hci_conn *conn;
3777 u8 status = rp->status;
3778 bool pending = false;
3779 int i;
3780
3781 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3782
3783 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
3784 if (!rp->status && (!cp || rp->num_handles != cp->num_cis ||
3785 rp->cig_id != cp->cig_id)) {
3786 bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
3787 status = HCI_ERROR_UNSPECIFIED;
3788 }
3789
3790 hci_dev_lock(hdev);
3791
3792 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554
3793 *
3794 * If the Status return parameter is non-zero, then the state of the CIG
3795 * and its CIS configurations shall not be changed by the command. If
3796 * the CIG did not already exist, it shall not be created.
3797 */
3798 if (status) {
3799 /* Keep current configuration, fail only the unbound CIS */
3800 hci_unbound_cis_failed(hdev, rp->cig_id, status);
3801 goto unlock;
3802 }
3803
3804 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
3805 *
3806 * If the Status return parameter is zero, then the Controller shall
3807 * set the Connection_Handle arrayed return parameter to the connection
3808 * handle(s) corresponding to the CIS configurations specified in
3809 * the CIS_IDs command parameter, in the same order.
3810 */
3811 for (i = 0; i < rp->num_handles; ++i) {
3812 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
3813 cp->cis[i].cis_id);
3814 if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
3815 continue;
3816
3817 if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
3818 continue;
3819
3820 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i])))
3821 continue;
3822
3823 if (conn->state == BT_CONNECT)
3824 pending = true;
3825 }
3826
3827 unlock:
3828 if (pending)
3829 hci_le_create_cis_pending(hdev);
3830
3831 hci_dev_unlock(hdev);
3832
3833 return rp->status;
3834 }
3835
hci_cc_le_setup_iso_path(struct hci_dev * hdev,void * data,struct sk_buff * skb)3836 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data,
3837 struct sk_buff *skb)
3838 {
3839 struct hci_rp_le_setup_iso_path *rp = data;
3840 struct hci_cp_le_setup_iso_path *cp;
3841 struct hci_conn *conn;
3842
3843 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3844
3845 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH);
3846 if (!cp)
3847 return rp->status;
3848
3849 hci_dev_lock(hdev);
3850
3851 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
3852 if (!conn)
3853 goto unlock;
3854
3855 if (rp->status) {
3856 hci_connect_cfm(conn, rp->status);
3857 hci_conn_del(conn);
3858 goto unlock;
3859 }
3860
3861 switch (cp->direction) {
3862 /* Input (Host to Controller) */
3863 case 0x00:
3864 /* Only confirm connection if output only */
3865 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu)
3866 hci_connect_cfm(conn, rp->status);
3867 break;
3868 /* Output (Controller to Host) */
3869 case 0x01:
3870 /* Confirm connection since conn->iso_qos is always configured
3871 * last.
3872 */
3873 hci_connect_cfm(conn, rp->status);
3874
3875 /* Notify device connected in case it is a BIG Sync */
3876 if (!rp->status && test_bit(HCI_CONN_BIG_SYNC, &conn->flags))
3877 mgmt_device_connected(hdev, conn, NULL, 0);
3878
3879 break;
3880 }
3881
3882 unlock:
3883 hci_dev_unlock(hdev);
3884 return rp->status;
3885 }
3886
hci_cs_le_create_big(struct hci_dev * hdev,u8 status)3887 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status)
3888 {
3889 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3890 }
3891
hci_cc_set_per_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)3892 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data,
3893 struct sk_buff *skb)
3894 {
3895 struct hci_ev_status *rp = data;
3896 struct hci_cp_le_set_per_adv_params *cp;
3897
3898 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3899
3900 if (rp->status)
3901 return rp->status;
3902
3903 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS);
3904 if (!cp)
3905 return rp->status;
3906
3907 /* TODO: set the conn state */
3908 return rp->status;
3909 }
3910
hci_cc_le_set_per_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)3911 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data,
3912 struct sk_buff *skb)
3913 {
3914 struct hci_ev_status *rp = data;
3915 struct hci_cp_le_set_per_adv_enable *cp;
3916 struct adv_info *adv = NULL, *n;
3917 u8 per_adv_cnt = 0;
3918
3919 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3920
3921 if (rp->status)
3922 return rp->status;
3923
3924 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE);
3925 if (!cp)
3926 return rp->status;
3927
3928 hci_dev_lock(hdev);
3929
3930 adv = hci_find_adv_instance(hdev, cp->handle);
3931
3932 if (cp->enable) {
3933 hci_dev_set_flag(hdev, HCI_LE_PER_ADV);
3934
3935 if (adv)
3936 adv->enabled = true;
3937 } else {
3938 /* If just one instance was disabled check if there are
3939 * any other instance enabled before clearing HCI_LE_PER_ADV.
3940 * The current periodic adv instance will be marked as
3941 * disabled once extended advertising is also disabled.
3942 */
3943 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
3944 list) {
3945 if (adv->periodic && adv->enabled)
3946 per_adv_cnt++;
3947 }
3948
3949 if (per_adv_cnt > 1)
3950 goto unlock;
3951
3952 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV);
3953 }
3954
3955 unlock:
3956 hci_dev_unlock(hdev);
3957
3958 return rp->status;
3959 }
3960
3961 #define HCI_CC_VL(_op, _func, _min, _max) \
3962 { \
3963 .op = _op, \
3964 .func = _func, \
3965 .min_len = _min, \
3966 .max_len = _max, \
3967 }
3968
3969 #define HCI_CC(_op, _func, _len) \
3970 HCI_CC_VL(_op, _func, _len, _len)
3971
3972 #define HCI_CC_STATUS(_op, _func) \
3973 HCI_CC(_op, _func, sizeof(struct hci_ev_status))
3974
3975 static const struct hci_cc {
3976 u16 op;
3977 u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
3978 u16 min_len;
3979 u16 max_len;
3980 } hci_cc_table[] = {
3981 HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel),
3982 HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq),
3983 HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq),
3984 HCI_CC_STATUS(HCI_OP_REMOTE_NAME_REQ_CANCEL,
3985 hci_cc_remote_name_req_cancel),
3986 HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery,
3987 sizeof(struct hci_rp_role_discovery)),
3988 HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy,
3989 sizeof(struct hci_rp_read_link_policy)),
3990 HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy,
3991 sizeof(struct hci_rp_write_link_policy)),
3992 HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy,
3993 sizeof(struct hci_rp_read_def_link_policy)),
3994 HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY,
3995 hci_cc_write_def_link_policy),
3996 HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset),
3997 HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key,
3998 sizeof(struct hci_rp_read_stored_link_key)),
3999 HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key,
4000 sizeof(struct hci_rp_delete_stored_link_key)),
4001 HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name),
4002 HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name,
4003 sizeof(struct hci_rp_read_local_name)),
4004 HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable),
4005 HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
4006 HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable),
4007 HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter),
4008 HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev,
4009 sizeof(struct hci_rp_read_class_of_dev)),
4010 HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev),
4011 HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting,
4012 sizeof(struct hci_rp_read_voice_setting)),
4013 HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting),
4014 HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac,
4015 sizeof(struct hci_rp_read_num_supported_iac)),
4016 HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode),
4017 HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support),
4018 HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout,
4019 sizeof(struct hci_rp_read_auth_payload_to)),
4020 HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout,
4021 sizeof(struct hci_rp_write_auth_payload_to)),
4022 HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version,
4023 sizeof(struct hci_rp_read_local_version)),
4024 HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands,
4025 sizeof(struct hci_rp_read_local_commands)),
4026 HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features,
4027 sizeof(struct hci_rp_read_local_features)),
4028 HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features,
4029 sizeof(struct hci_rp_read_local_ext_features)),
4030 HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size,
4031 sizeof(struct hci_rp_read_buffer_size)),
4032 HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr,
4033 sizeof(struct hci_rp_read_bd_addr)),
4034 HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts,
4035 sizeof(struct hci_rp_read_local_pairing_opts)),
4036 HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity,
4037 sizeof(struct hci_rp_read_page_scan_activity)),
4038 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
4039 hci_cc_write_page_scan_activity),
4040 HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type,
4041 sizeof(struct hci_rp_read_page_scan_type)),
4042 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type),
4043 HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock,
4044 sizeof(struct hci_rp_read_clock)),
4045 HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size,
4046 sizeof(struct hci_rp_read_enc_key_size)),
4047 HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power,
4048 sizeof(struct hci_rp_read_inq_rsp_tx_power)),
4049 HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4050 hci_cc_read_def_err_data_reporting,
4051 sizeof(struct hci_rp_read_def_err_data_reporting)),
4052 HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4053 hci_cc_write_def_err_data_reporting),
4054 HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply,
4055 sizeof(struct hci_rp_pin_code_reply)),
4056 HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply,
4057 sizeof(struct hci_rp_pin_code_neg_reply)),
4058 HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data,
4059 sizeof(struct hci_rp_read_local_oob_data)),
4060 HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data,
4061 sizeof(struct hci_rp_read_local_oob_ext_data)),
4062 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size,
4063 sizeof(struct hci_rp_le_read_buffer_size)),
4064 HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features,
4065 sizeof(struct hci_rp_le_read_local_features)),
4066 HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power,
4067 sizeof(struct hci_rp_le_read_adv_tx_power)),
4068 HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply,
4069 sizeof(struct hci_rp_user_confirm_reply)),
4070 HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply,
4071 sizeof(struct hci_rp_user_confirm_reply)),
4072 HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply,
4073 sizeof(struct hci_rp_user_confirm_reply)),
4074 HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply,
4075 sizeof(struct hci_rp_user_confirm_reply)),
4076 HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr),
4077 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable),
4078 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param),
4079 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable),
4080 HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4081 hci_cc_le_read_accept_list_size,
4082 sizeof(struct hci_rp_le_read_accept_list_size)),
4083 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list),
4084 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST,
4085 hci_cc_le_add_to_accept_list),
4086 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
4087 hci_cc_le_del_from_accept_list),
4088 HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states,
4089 sizeof(struct hci_rp_le_read_supported_states)),
4090 HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len,
4091 sizeof(struct hci_rp_le_read_def_data_len)),
4092 HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN,
4093 hci_cc_le_write_def_data_len),
4094 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST,
4095 hci_cc_le_add_to_resolv_list),
4096 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST,
4097 hci_cc_le_del_from_resolv_list),
4098 HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST,
4099 hci_cc_le_clear_resolv_list),
4100 HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size,
4101 sizeof(struct hci_rp_le_read_resolv_list_size)),
4102 HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
4103 hci_cc_le_set_addr_resolution_enable),
4104 HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len,
4105 sizeof(struct hci_rp_le_read_max_data_len)),
4106 HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED,
4107 hci_cc_write_le_host_supported),
4108 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param),
4109 HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi,
4110 sizeof(struct hci_rp_read_rssi)),
4111 HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power,
4112 sizeof(struct hci_rp_read_tx_power)),
4113 HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode),
4114 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS,
4115 hci_cc_le_set_ext_scan_param),
4116 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE,
4117 hci_cc_le_set_ext_scan_enable),
4118 HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy),
4119 HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4120 hci_cc_le_read_num_adv_sets,
4121 sizeof(struct hci_rp_le_read_num_supported_adv_sets)),
4122 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE,
4123 hci_cc_le_set_ext_adv_enable),
4124 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
4125 hci_cc_le_set_adv_set_random_addr),
4126 HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set),
4127 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets),
4128 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param),
4129 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE,
4130 hci_cc_le_set_per_adv_enable),
4131 HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power,
4132 sizeof(struct hci_rp_le_read_transmit_power)),
4133 HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode),
4134 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2,
4135 sizeof(struct hci_rp_le_read_buffer_size_v2)),
4136 HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params,
4137 sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE),
4138 HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path,
4139 sizeof(struct hci_rp_le_setup_iso_path)),
4140 };
4141
hci_cc_func(struct hci_dev * hdev,const struct hci_cc * cc,struct sk_buff * skb)4142 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc,
4143 struct sk_buff *skb)
4144 {
4145 void *data;
4146
4147 if (skb->len < cc->min_len) {
4148 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u",
4149 cc->op, skb->len, cc->min_len);
4150 return HCI_ERROR_UNSPECIFIED;
4151 }
4152
4153 /* Just warn if the length is over max_len size it still be possible to
4154 * partially parse the cc so leave to callback to decide if that is
4155 * acceptable.
4156 */
4157 if (skb->len > cc->max_len)
4158 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u",
4159 cc->op, skb->len, cc->max_len);
4160
4161 data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len);
4162 if (!data)
4163 return HCI_ERROR_UNSPECIFIED;
4164
4165 return cc->func(hdev, data, skb);
4166 }
4167
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)4168 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
4169 struct sk_buff *skb, u16 *opcode, u8 *status,
4170 hci_req_complete_t *req_complete,
4171 hci_req_complete_skb_t *req_complete_skb)
4172 {
4173 struct hci_ev_cmd_complete *ev = data;
4174 int i;
4175
4176 *opcode = __le16_to_cpu(ev->opcode);
4177
4178 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4179
4180 for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) {
4181 if (hci_cc_table[i].op == *opcode) {
4182 *status = hci_cc_func(hdev, &hci_cc_table[i], skb);
4183 break;
4184 }
4185 }
4186
4187 if (i == ARRAY_SIZE(hci_cc_table)) {
4188 /* Unknown opcode, assume byte 0 contains the status, so
4189 * that e.g. __hci_cmd_sync() properly returns errors
4190 * for vendor specific commands send by HCI drivers.
4191 * If a vendor doesn't actually follow this convention we may
4192 * need to introduce a vendor CC table in order to properly set
4193 * the status.
4194 */
4195 *status = skb->data[0];
4196 }
4197
4198 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4199
4200 hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
4201 req_complete_skb);
4202
4203 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4204 bt_dev_err(hdev,
4205 "unexpected event for opcode 0x%4.4x", *opcode);
4206 return;
4207 }
4208
4209 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4210 queue_work(hdev->workqueue, &hdev->cmd_work);
4211 }
4212
hci_cs_le_create_cis(struct hci_dev * hdev,u8 status)4213 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
4214 {
4215 struct hci_cp_le_create_cis *cp;
4216 bool pending = false;
4217 int i;
4218
4219 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4220
4221 if (!status)
4222 return;
4223
4224 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
4225 if (!cp)
4226 return;
4227
4228 hci_dev_lock(hdev);
4229
4230 /* Remove connection if command failed */
4231 for (i = 0; cp->num_cis; cp->num_cis--, i++) {
4232 struct hci_conn *conn;
4233 u16 handle;
4234
4235 handle = __le16_to_cpu(cp->cis[i].cis_handle);
4236
4237 conn = hci_conn_hash_lookup_handle(hdev, handle);
4238 if (conn) {
4239 if (test_and_clear_bit(HCI_CONN_CREATE_CIS,
4240 &conn->flags))
4241 pending = true;
4242 conn->state = BT_CLOSED;
4243 hci_connect_cfm(conn, status);
4244 hci_conn_del(conn);
4245 }
4246 }
4247
4248 if (pending)
4249 hci_le_create_cis_pending(hdev);
4250
4251 hci_dev_unlock(hdev);
4252 }
4253
4254 #define HCI_CS(_op, _func) \
4255 { \
4256 .op = _op, \
4257 .func = _func, \
4258 }
4259
4260 static const struct hci_cs {
4261 u16 op;
4262 void (*func)(struct hci_dev *hdev, __u8 status);
4263 } hci_cs_table[] = {
4264 HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry),
4265 HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn),
4266 HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect),
4267 HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco),
4268 HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested),
4269 HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt),
4270 HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req),
4271 HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features),
4272 HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES,
4273 hci_cs_read_remote_ext_features),
4274 HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn),
4275 HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN,
4276 hci_cs_enhanced_setup_sync_conn),
4277 HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode),
4278 HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode),
4279 HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role),
4280 HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn),
4281 HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features),
4282 HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc),
4283 HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn),
4284 HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis),
4285 HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big),
4286 };
4287
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)4288 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data,
4289 struct sk_buff *skb, u16 *opcode, u8 *status,
4290 hci_req_complete_t *req_complete,
4291 hci_req_complete_skb_t *req_complete_skb)
4292 {
4293 struct hci_ev_cmd_status *ev = data;
4294 int i;
4295
4296 *opcode = __le16_to_cpu(ev->opcode);
4297 *status = ev->status;
4298
4299 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4300
4301 for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) {
4302 if (hci_cs_table[i].op == *opcode) {
4303 hci_cs_table[i].func(hdev, ev->status);
4304 break;
4305 }
4306 }
4307
4308 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4309
4310 /* Indicate request completion if the command failed. Also, if
4311 * we're not waiting for a special event and we get a success
4312 * command status we should try to flag the request as completed
4313 * (since for this kind of commands there will not be a command
4314 * complete event).
4315 */
4316 if (ev->status || (hdev->req_skb && !hci_skb_event(hdev->req_skb))) {
4317 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
4318 req_complete_skb);
4319 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4320 bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x",
4321 *opcode);
4322 return;
4323 }
4324 }
4325
4326 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4327 queue_work(hdev->workqueue, &hdev->cmd_work);
4328 }
4329
hci_hardware_error_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4330 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data,
4331 struct sk_buff *skb)
4332 {
4333 struct hci_ev_hardware_error *ev = data;
4334
4335 bt_dev_dbg(hdev, "code 0x%2.2x", ev->code);
4336
4337 hdev->hw_error_code = ev->code;
4338
4339 queue_work(hdev->req_workqueue, &hdev->error_reset);
4340 }
4341
hci_role_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4342 static void hci_role_change_evt(struct hci_dev *hdev, void *data,
4343 struct sk_buff *skb)
4344 {
4345 struct hci_ev_role_change *ev = data;
4346 struct hci_conn *conn;
4347
4348 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4349
4350 hci_dev_lock(hdev);
4351
4352 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4353 if (conn) {
4354 if (!ev->status)
4355 conn->role = ev->role;
4356
4357 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
4358
4359 hci_role_switch_cfm(conn, ev->status, ev->role);
4360 }
4361
4362 hci_dev_unlock(hdev);
4363 }
4364
hci_num_comp_pkts_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4365 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data,
4366 struct sk_buff *skb)
4367 {
4368 struct hci_ev_num_comp_pkts *ev = data;
4369 int i;
4370
4371 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS,
4372 flex_array_size(ev, handles, ev->num)))
4373 return;
4374
4375 bt_dev_dbg(hdev, "num %d", ev->num);
4376
4377 for (i = 0; i < ev->num; i++) {
4378 struct hci_comp_pkts_info *info = &ev->handles[i];
4379 struct hci_conn *conn;
4380 __u16 handle, count;
4381
4382 handle = __le16_to_cpu(info->handle);
4383 count = __le16_to_cpu(info->count);
4384
4385 conn = hci_conn_hash_lookup_handle(hdev, handle);
4386 if (!conn)
4387 continue;
4388
4389 conn->sent -= count;
4390
4391 switch (conn->type) {
4392 case ACL_LINK:
4393 hdev->acl_cnt += count;
4394 if (hdev->acl_cnt > hdev->acl_pkts)
4395 hdev->acl_cnt = hdev->acl_pkts;
4396 break;
4397
4398 case LE_LINK:
4399 if (hdev->le_pkts) {
4400 hdev->le_cnt += count;
4401 if (hdev->le_cnt > hdev->le_pkts)
4402 hdev->le_cnt = hdev->le_pkts;
4403 } else {
4404 hdev->acl_cnt += count;
4405 if (hdev->acl_cnt > hdev->acl_pkts)
4406 hdev->acl_cnt = hdev->acl_pkts;
4407 }
4408 break;
4409
4410 case SCO_LINK:
4411 hdev->sco_cnt += count;
4412 if (hdev->sco_cnt > hdev->sco_pkts)
4413 hdev->sco_cnt = hdev->sco_pkts;
4414 break;
4415
4416 case ISO_LINK:
4417 if (hdev->iso_pkts) {
4418 hdev->iso_cnt += count;
4419 if (hdev->iso_cnt > hdev->iso_pkts)
4420 hdev->iso_cnt = hdev->iso_pkts;
4421 } else 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 default:
4433 bt_dev_err(hdev, "unknown type %d conn %p",
4434 conn->type, conn);
4435 break;
4436 }
4437 }
4438
4439 queue_work(hdev->workqueue, &hdev->tx_work);
4440 }
4441
hci_mode_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4442 static void hci_mode_change_evt(struct hci_dev *hdev, void *data,
4443 struct sk_buff *skb)
4444 {
4445 struct hci_ev_mode_change *ev = data;
4446 struct hci_conn *conn;
4447
4448 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4449
4450 hci_dev_lock(hdev);
4451
4452 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4453 if (conn) {
4454 conn->mode = ev->mode;
4455
4456 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
4457 &conn->flags)) {
4458 if (conn->mode == HCI_CM_ACTIVE)
4459 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4460 else
4461 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4462 }
4463
4464 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
4465 hci_sco_setup(conn, ev->status);
4466 }
4467
4468 hci_dev_unlock(hdev);
4469 }
4470
hci_pin_code_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4471 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data,
4472 struct sk_buff *skb)
4473 {
4474 struct hci_ev_pin_code_req *ev = data;
4475 struct hci_conn *conn;
4476
4477 bt_dev_dbg(hdev, "");
4478
4479 hci_dev_lock(hdev);
4480
4481 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4482 if (!conn)
4483 goto unlock;
4484
4485 if (conn->state == BT_CONNECTED) {
4486 hci_conn_hold(conn);
4487 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
4488 hci_conn_drop(conn);
4489 }
4490
4491 if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
4492 !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
4493 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
4494 sizeof(ev->bdaddr), &ev->bdaddr);
4495 } else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4496 u8 secure;
4497
4498 if (conn->pending_sec_level == BT_SECURITY_HIGH)
4499 secure = 1;
4500 else
4501 secure = 0;
4502
4503 mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
4504 }
4505
4506 unlock:
4507 hci_dev_unlock(hdev);
4508 }
4509
conn_set_key(struct hci_conn * conn,u8 key_type,u8 pin_len)4510 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
4511 {
4512 if (key_type == HCI_LK_CHANGED_COMBINATION)
4513 return;
4514
4515 conn->pin_length = pin_len;
4516 conn->key_type = key_type;
4517
4518 switch (key_type) {
4519 case HCI_LK_LOCAL_UNIT:
4520 case HCI_LK_REMOTE_UNIT:
4521 case HCI_LK_DEBUG_COMBINATION:
4522 return;
4523 case HCI_LK_COMBINATION:
4524 if (pin_len == 16)
4525 conn->pending_sec_level = BT_SECURITY_HIGH;
4526 else
4527 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4528 break;
4529 case HCI_LK_UNAUTH_COMBINATION_P192:
4530 case HCI_LK_UNAUTH_COMBINATION_P256:
4531 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4532 break;
4533 case HCI_LK_AUTH_COMBINATION_P192:
4534 conn->pending_sec_level = BT_SECURITY_HIGH;
4535 break;
4536 case HCI_LK_AUTH_COMBINATION_P256:
4537 conn->pending_sec_level = BT_SECURITY_FIPS;
4538 break;
4539 }
4540 }
4541
hci_link_key_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4542 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data,
4543 struct sk_buff *skb)
4544 {
4545 struct hci_ev_link_key_req *ev = data;
4546 struct hci_cp_link_key_reply cp;
4547 struct hci_conn *conn;
4548 struct link_key *key;
4549
4550 bt_dev_dbg(hdev, "");
4551
4552 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4553 return;
4554
4555 hci_dev_lock(hdev);
4556
4557 key = hci_find_link_key(hdev, &ev->bdaddr);
4558 if (!key) {
4559 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr);
4560 goto not_found;
4561 }
4562
4563 bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr);
4564
4565 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4566 if (conn) {
4567 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4568
4569 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
4570 key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
4571 conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
4572 bt_dev_dbg(hdev, "ignoring unauthenticated key");
4573 goto not_found;
4574 }
4575
4576 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
4577 (conn->pending_sec_level == BT_SECURITY_HIGH ||
4578 conn->pending_sec_level == BT_SECURITY_FIPS)) {
4579 bt_dev_dbg(hdev, "ignoring key unauthenticated for high security");
4580 goto not_found;
4581 }
4582
4583 conn_set_key(conn, key->type, key->pin_len);
4584 }
4585
4586 bacpy(&cp.bdaddr, &ev->bdaddr);
4587 memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
4588
4589 hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
4590
4591 hci_dev_unlock(hdev);
4592
4593 return;
4594
4595 not_found:
4596 hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
4597 hci_dev_unlock(hdev);
4598 }
4599
hci_link_key_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4600 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data,
4601 struct sk_buff *skb)
4602 {
4603 struct hci_ev_link_key_notify *ev = data;
4604 struct hci_conn *conn;
4605 struct link_key *key;
4606 bool persistent;
4607 u8 pin_len = 0;
4608
4609 bt_dev_dbg(hdev, "");
4610
4611 hci_dev_lock(hdev);
4612
4613 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4614 if (!conn)
4615 goto unlock;
4616
4617 /* Ignore NULL link key against CVE-2020-26555 */
4618 if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
4619 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
4620 &ev->bdaddr);
4621 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
4622 hci_conn_drop(conn);
4623 goto unlock;
4624 }
4625
4626 hci_conn_hold(conn);
4627 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
4628 hci_conn_drop(conn);
4629
4630 set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4631 conn_set_key(conn, ev->key_type, conn->pin_length);
4632
4633 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4634 goto unlock;
4635
4636 key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
4637 ev->key_type, pin_len, &persistent);
4638 if (!key)
4639 goto unlock;
4640
4641 /* Update connection information since adding the key will have
4642 * fixed up the type in the case of changed combination keys.
4643 */
4644 if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
4645 conn_set_key(conn, key->type, key->pin_len);
4646
4647 mgmt_new_link_key(hdev, key, persistent);
4648
4649 /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
4650 * is set. If it's not set simply remove the key from the kernel
4651 * list (we've still notified user space about it but with
4652 * store_hint being 0).
4653 */
4654 if (key->type == HCI_LK_DEBUG_COMBINATION &&
4655 !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
4656 list_del_rcu(&key->list);
4657 kfree_rcu(key, rcu);
4658 goto unlock;
4659 }
4660
4661 if (persistent)
4662 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4663 else
4664 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4665
4666 unlock:
4667 hci_dev_unlock(hdev);
4668 }
4669
hci_clock_offset_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4670 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data,
4671 struct sk_buff *skb)
4672 {
4673 struct hci_ev_clock_offset *ev = data;
4674 struct hci_conn *conn;
4675
4676 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4677
4678 hci_dev_lock(hdev);
4679
4680 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4681 if (conn && !ev->status) {
4682 struct inquiry_entry *ie;
4683
4684 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4685 if (ie) {
4686 ie->data.clock_offset = ev->clock_offset;
4687 ie->timestamp = jiffies;
4688 }
4689 }
4690
4691 hci_dev_unlock(hdev);
4692 }
4693
hci_pkt_type_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4694 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data,
4695 struct sk_buff *skb)
4696 {
4697 struct hci_ev_pkt_type_change *ev = data;
4698 struct hci_conn *conn;
4699
4700 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4701
4702 hci_dev_lock(hdev);
4703
4704 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4705 if (conn && !ev->status)
4706 conn->pkt_type = __le16_to_cpu(ev->pkt_type);
4707
4708 hci_dev_unlock(hdev);
4709 }
4710
hci_pscan_rep_mode_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4711 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data,
4712 struct sk_buff *skb)
4713 {
4714 struct hci_ev_pscan_rep_mode *ev = data;
4715 struct inquiry_entry *ie;
4716
4717 bt_dev_dbg(hdev, "");
4718
4719 hci_dev_lock(hdev);
4720
4721 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
4722 if (ie) {
4723 ie->data.pscan_rep_mode = ev->pscan_rep_mode;
4724 ie->timestamp = jiffies;
4725 }
4726
4727 hci_dev_unlock(hdev);
4728 }
4729
hci_inquiry_result_with_rssi_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)4730 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
4731 struct sk_buff *skb)
4732 {
4733 struct hci_ev_inquiry_result_rssi *ev = edata;
4734 struct inquiry_data data;
4735 int i;
4736
4737 bt_dev_dbg(hdev, "num_rsp %d", ev->num);
4738
4739 if (!ev->num)
4740 return;
4741
4742 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
4743 return;
4744
4745 hci_dev_lock(hdev);
4746
4747 if (skb->len == array_size(ev->num,
4748 sizeof(struct inquiry_info_rssi_pscan))) {
4749 struct inquiry_info_rssi_pscan *info;
4750
4751 for (i = 0; i < ev->num; i++) {
4752 u32 flags;
4753
4754 info = hci_ev_skb_pull(hdev, skb,
4755 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4756 sizeof(*info));
4757 if (!info) {
4758 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4759 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4760 goto unlock;
4761 }
4762
4763 bacpy(&data.bdaddr, &info->bdaddr);
4764 data.pscan_rep_mode = info->pscan_rep_mode;
4765 data.pscan_period_mode = info->pscan_period_mode;
4766 data.pscan_mode = info->pscan_mode;
4767 memcpy(data.dev_class, info->dev_class, 3);
4768 data.clock_offset = info->clock_offset;
4769 data.rssi = info->rssi;
4770 data.ssp_mode = 0x00;
4771
4772 flags = hci_inquiry_cache_update(hdev, &data, false);
4773
4774 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4775 info->dev_class, info->rssi,
4776 flags, NULL, 0, NULL, 0, 0);
4777 }
4778 } else if (skb->len == array_size(ev->num,
4779 sizeof(struct inquiry_info_rssi))) {
4780 struct inquiry_info_rssi *info;
4781
4782 for (i = 0; i < ev->num; i++) {
4783 u32 flags;
4784
4785 info = hci_ev_skb_pull(hdev, skb,
4786 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4787 sizeof(*info));
4788 if (!info) {
4789 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4790 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4791 goto unlock;
4792 }
4793
4794 bacpy(&data.bdaddr, &info->bdaddr);
4795 data.pscan_rep_mode = info->pscan_rep_mode;
4796 data.pscan_period_mode = info->pscan_period_mode;
4797 data.pscan_mode = 0x00;
4798 memcpy(data.dev_class, info->dev_class, 3);
4799 data.clock_offset = info->clock_offset;
4800 data.rssi = info->rssi;
4801 data.ssp_mode = 0x00;
4802
4803 flags = hci_inquiry_cache_update(hdev, &data, false);
4804
4805 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4806 info->dev_class, info->rssi,
4807 flags, NULL, 0, NULL, 0, 0);
4808 }
4809 } else {
4810 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4811 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4812 }
4813 unlock:
4814 hci_dev_unlock(hdev);
4815 }
4816
hci_remote_ext_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4817 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data,
4818 struct sk_buff *skb)
4819 {
4820 struct hci_ev_remote_ext_features *ev = data;
4821 struct hci_conn *conn;
4822
4823 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4824
4825 hci_dev_lock(hdev);
4826
4827 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4828 if (!conn)
4829 goto unlock;
4830
4831 if (ev->page < HCI_MAX_PAGES)
4832 memcpy(conn->features[ev->page], ev->features, 8);
4833
4834 if (!ev->status && ev->page == 0x01) {
4835 struct inquiry_entry *ie;
4836
4837 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4838 if (ie)
4839 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4840
4841 if (ev->features[0] & LMP_HOST_SSP) {
4842 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4843 } else {
4844 /* It is mandatory by the Bluetooth specification that
4845 * Extended Inquiry Results are only used when Secure
4846 * Simple Pairing is enabled, but some devices violate
4847 * this.
4848 *
4849 * To make these devices work, the internal SSP
4850 * enabled flag needs to be cleared if the remote host
4851 * features do not indicate SSP support */
4852 clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4853 }
4854
4855 if (ev->features[0] & LMP_HOST_SC)
4856 set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
4857 }
4858
4859 if (conn->state != BT_CONFIG)
4860 goto unlock;
4861
4862 if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
4863 struct hci_cp_remote_name_req cp;
4864 memset(&cp, 0, sizeof(cp));
4865 bacpy(&cp.bdaddr, &conn->dst);
4866 cp.pscan_rep_mode = 0x02;
4867 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
4868 } else {
4869 mgmt_device_connected(hdev, conn, NULL, 0);
4870 }
4871
4872 if (!hci_outgoing_auth_needed(hdev, conn)) {
4873 conn->state = BT_CONNECTED;
4874 hci_connect_cfm(conn, ev->status);
4875 hci_conn_drop(conn);
4876 }
4877
4878 unlock:
4879 hci_dev_unlock(hdev);
4880 }
4881
hci_sync_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4882 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
4883 struct sk_buff *skb)
4884 {
4885 struct hci_ev_sync_conn_complete *ev = data;
4886 struct hci_conn *conn;
4887 u8 status = ev->status;
4888
4889 switch (ev->link_type) {
4890 case SCO_LINK:
4891 case ESCO_LINK:
4892 break;
4893 default:
4894 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
4895 * for HCI_Synchronous_Connection_Complete is limited to
4896 * either SCO or eSCO
4897 */
4898 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
4899 return;
4900 }
4901
4902 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4903
4904 hci_dev_lock(hdev);
4905
4906 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
4907 if (!conn) {
4908 if (ev->link_type == ESCO_LINK)
4909 goto unlock;
4910
4911 /* When the link type in the event indicates SCO connection
4912 * and lookup of the connection object fails, then check
4913 * if an eSCO connection object exists.
4914 *
4915 * The core limits the synchronous connections to either
4916 * SCO or eSCO. The eSCO connection is preferred and tried
4917 * to be setup first and until successfully established,
4918 * the link type will be hinted as eSCO.
4919 */
4920 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
4921 if (!conn)
4922 goto unlock;
4923 }
4924
4925 /* The HCI_Synchronous_Connection_Complete event is only sent once per connection.
4926 * Processing it more than once per connection can corrupt kernel memory.
4927 *
4928 * As the connection handle is set here for the first time, it indicates
4929 * whether the connection is already set up.
4930 */
4931 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
4932 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection");
4933 goto unlock;
4934 }
4935
4936 switch (status) {
4937 case 0x00:
4938 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
4939 if (status) {
4940 conn->state = BT_CLOSED;
4941 break;
4942 }
4943
4944 conn->state = BT_CONNECTED;
4945 conn->type = ev->link_type;
4946
4947 hci_debugfs_create_conn(conn);
4948 hci_conn_add_sysfs(conn);
4949 break;
4950
4951 case 0x10: /* Connection Accept Timeout */
4952 case 0x0d: /* Connection Rejected due to Limited Resources */
4953 case 0x11: /* Unsupported Feature or Parameter Value */
4954 case 0x1c: /* SCO interval rejected */
4955 case 0x1a: /* Unsupported Remote Feature */
4956 case 0x1e: /* Invalid LMP Parameters */
4957 case 0x1f: /* Unspecified error */
4958 case 0x20: /* Unsupported LMP Parameter value */
4959 if (conn->out) {
4960 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
4961 (hdev->esco_type & EDR_ESCO_MASK);
4962 if (hci_setup_sync(conn, conn->parent->handle))
4963 goto unlock;
4964 }
4965 fallthrough;
4966
4967 default:
4968 conn->state = BT_CLOSED;
4969 break;
4970 }
4971
4972 bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode);
4973 /* Notify only in case of SCO over HCI transport data path which
4974 * is zero and non-zero value shall be non-HCI transport data path
4975 */
4976 if (conn->codec.data_path == 0 && hdev->notify) {
4977 switch (ev->air_mode) {
4978 case 0x02:
4979 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
4980 break;
4981 case 0x03:
4982 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP);
4983 break;
4984 }
4985 }
4986
4987 hci_connect_cfm(conn, status);
4988 if (status)
4989 hci_conn_del(conn);
4990
4991 unlock:
4992 hci_dev_unlock(hdev);
4993 }
4994
eir_get_length(u8 * eir,size_t eir_len)4995 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
4996 {
4997 size_t parsed = 0;
4998
4999 while (parsed < eir_len) {
5000 u8 field_len = eir[0];
5001
5002 if (field_len == 0)
5003 return parsed;
5004
5005 parsed += field_len + 1;
5006 eir += field_len + 1;
5007 }
5008
5009 return eir_len;
5010 }
5011
hci_extended_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5012 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata,
5013 struct sk_buff *skb)
5014 {
5015 struct hci_ev_ext_inquiry_result *ev = edata;
5016 struct inquiry_data data;
5017 size_t eir_len;
5018 int i;
5019
5020 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT,
5021 flex_array_size(ev, info, ev->num)))
5022 return;
5023
5024 bt_dev_dbg(hdev, "num %d", ev->num);
5025
5026 if (!ev->num)
5027 return;
5028
5029 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
5030 return;
5031
5032 hci_dev_lock(hdev);
5033
5034 for (i = 0; i < ev->num; i++) {
5035 struct extended_inquiry_info *info = &ev->info[i];
5036 u32 flags;
5037 bool name_known;
5038
5039 bacpy(&data.bdaddr, &info->bdaddr);
5040 data.pscan_rep_mode = info->pscan_rep_mode;
5041 data.pscan_period_mode = info->pscan_period_mode;
5042 data.pscan_mode = 0x00;
5043 memcpy(data.dev_class, info->dev_class, 3);
5044 data.clock_offset = info->clock_offset;
5045 data.rssi = info->rssi;
5046 data.ssp_mode = 0x01;
5047
5048 if (hci_dev_test_flag(hdev, HCI_MGMT))
5049 name_known = eir_get_data(info->data,
5050 sizeof(info->data),
5051 EIR_NAME_COMPLETE, NULL);
5052 else
5053 name_known = true;
5054
5055 flags = hci_inquiry_cache_update(hdev, &data, name_known);
5056
5057 eir_len = eir_get_length(info->data, sizeof(info->data));
5058
5059 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
5060 info->dev_class, info->rssi,
5061 flags, info->data, eir_len, NULL, 0, 0);
5062 }
5063
5064 hci_dev_unlock(hdev);
5065 }
5066
hci_key_refresh_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5067 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data,
5068 struct sk_buff *skb)
5069 {
5070 struct hci_ev_key_refresh_complete *ev = data;
5071 struct hci_conn *conn;
5072
5073 bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status,
5074 __le16_to_cpu(ev->handle));
5075
5076 hci_dev_lock(hdev);
5077
5078 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5079 if (!conn)
5080 goto unlock;
5081
5082 /* For BR/EDR the necessary steps are taken through the
5083 * auth_complete event.
5084 */
5085 if (conn->type != LE_LINK)
5086 goto unlock;
5087
5088 if (!ev->status)
5089 conn->sec_level = conn->pending_sec_level;
5090
5091 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
5092
5093 if (ev->status && conn->state == BT_CONNECTED) {
5094 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
5095 hci_conn_drop(conn);
5096 goto unlock;
5097 }
5098
5099 if (conn->state == BT_CONFIG) {
5100 if (!ev->status)
5101 conn->state = BT_CONNECTED;
5102
5103 hci_connect_cfm(conn, ev->status);
5104 hci_conn_drop(conn);
5105 } else {
5106 hci_auth_cfm(conn, ev->status);
5107
5108 hci_conn_hold(conn);
5109 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
5110 hci_conn_drop(conn);
5111 }
5112
5113 unlock:
5114 hci_dev_unlock(hdev);
5115 }
5116
hci_get_auth_req(struct hci_conn * conn)5117 static u8 hci_get_auth_req(struct hci_conn *conn)
5118 {
5119 /* If remote requests no-bonding follow that lead */
5120 if (conn->remote_auth == HCI_AT_NO_BONDING ||
5121 conn->remote_auth == HCI_AT_NO_BONDING_MITM)
5122 return conn->remote_auth | (conn->auth_type & 0x01);
5123
5124 /* If both remote and local have enough IO capabilities, require
5125 * MITM protection
5126 */
5127 if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
5128 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
5129 return conn->remote_auth | 0x01;
5130
5131 /* No MITM protection possible so ignore remote requirement */
5132 return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
5133 }
5134
bredr_oob_data_present(struct hci_conn * conn)5135 static u8 bredr_oob_data_present(struct hci_conn *conn)
5136 {
5137 struct hci_dev *hdev = conn->hdev;
5138 struct oob_data *data;
5139
5140 data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
5141 if (!data)
5142 return 0x00;
5143
5144 if (bredr_sc_enabled(hdev)) {
5145 /* When Secure Connections is enabled, then just
5146 * return the present value stored with the OOB
5147 * data. The stored value contains the right present
5148 * information. However it can only be trusted when
5149 * not in Secure Connection Only mode.
5150 */
5151 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
5152 return data->present;
5153
5154 /* When Secure Connections Only mode is enabled, then
5155 * the P-256 values are required. If they are not
5156 * available, then do not declare that OOB data is
5157 * present.
5158 */
5159 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
5160 !crypto_memneq(data->hash256, ZERO_KEY, 16))
5161 return 0x00;
5162
5163 return 0x02;
5164 }
5165
5166 /* When Secure Connections is not enabled or actually
5167 * not supported by the hardware, then check that if
5168 * P-192 data values are present.
5169 */
5170 if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
5171 !crypto_memneq(data->hash192, ZERO_KEY, 16))
5172 return 0x00;
5173
5174 return 0x01;
5175 }
5176
hci_io_capa_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5177 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data,
5178 struct sk_buff *skb)
5179 {
5180 struct hci_ev_io_capa_request *ev = data;
5181 struct hci_conn *conn;
5182
5183 bt_dev_dbg(hdev, "");
5184
5185 hci_dev_lock(hdev);
5186
5187 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5188 if (!conn || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
5189 goto unlock;
5190
5191 /* Assume remote supports SSP since it has triggered this event */
5192 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
5193
5194 hci_conn_hold(conn);
5195
5196 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5197 goto unlock;
5198
5199 /* Allow pairing if we're pairable, the initiators of the
5200 * pairing or if the remote is not requesting bonding.
5201 */
5202 if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
5203 test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
5204 (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
5205 struct hci_cp_io_capability_reply cp;
5206
5207 bacpy(&cp.bdaddr, &ev->bdaddr);
5208 /* Change the IO capability from KeyboardDisplay
5209 * to DisplayYesNo as it is not supported by BT spec. */
5210 cp.capability = (conn->io_capability == 0x04) ?
5211 HCI_IO_DISPLAY_YESNO : conn->io_capability;
5212
5213 /* If we are initiators, there is no remote information yet */
5214 if (conn->remote_auth == 0xff) {
5215 /* Request MITM protection if our IO caps allow it
5216 * except for the no-bonding case.
5217 */
5218 if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5219 conn->auth_type != HCI_AT_NO_BONDING)
5220 conn->auth_type |= 0x01;
5221 } else {
5222 conn->auth_type = hci_get_auth_req(conn);
5223 }
5224
5225 /* If we're not bondable, force one of the non-bondable
5226 * authentication requirement values.
5227 */
5228 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
5229 conn->auth_type &= HCI_AT_NO_BONDING_MITM;
5230
5231 cp.authentication = conn->auth_type;
5232 cp.oob_data = bredr_oob_data_present(conn);
5233
5234 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
5235 sizeof(cp), &cp);
5236 } else {
5237 struct hci_cp_io_capability_neg_reply cp;
5238
5239 bacpy(&cp.bdaddr, &ev->bdaddr);
5240 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
5241
5242 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
5243 sizeof(cp), &cp);
5244 }
5245
5246 unlock:
5247 hci_dev_unlock(hdev);
5248 }
5249
hci_io_capa_reply_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5250 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data,
5251 struct sk_buff *skb)
5252 {
5253 struct hci_ev_io_capa_reply *ev = data;
5254 struct hci_conn *conn;
5255
5256 bt_dev_dbg(hdev, "");
5257
5258 hci_dev_lock(hdev);
5259
5260 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5261 if (!conn)
5262 goto unlock;
5263
5264 conn->remote_cap = ev->capability;
5265 conn->remote_auth = ev->authentication;
5266
5267 unlock:
5268 hci_dev_unlock(hdev);
5269 }
5270
hci_user_confirm_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5271 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data,
5272 struct sk_buff *skb)
5273 {
5274 struct hci_ev_user_confirm_req *ev = data;
5275 int loc_mitm, rem_mitm, confirm_hint = 0;
5276 struct hci_conn *conn;
5277
5278 bt_dev_dbg(hdev, "");
5279
5280 hci_dev_lock(hdev);
5281
5282 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5283 goto unlock;
5284
5285 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5286 if (!conn)
5287 goto unlock;
5288
5289 loc_mitm = (conn->auth_type & 0x01);
5290 rem_mitm = (conn->remote_auth & 0x01);
5291
5292 /* If we require MITM but the remote device can't provide that
5293 * (it has NoInputNoOutput) then reject the confirmation
5294 * request. We check the security level here since it doesn't
5295 * necessarily match conn->auth_type.
5296 */
5297 if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
5298 conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
5299 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM");
5300 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
5301 sizeof(ev->bdaddr), &ev->bdaddr);
5302 goto unlock;
5303 }
5304
5305 /* If no side requires MITM protection; use JUST_CFM method */
5306 if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
5307 (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
5308
5309 /* If we're not the initiator of request authorization and the
5310 * local IO capability is not NoInputNoOutput, use JUST_WORKS
5311 * method (mgmt_user_confirm with confirm_hint set to 1).
5312 */
5313 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5314 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) {
5315 bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5316 confirm_hint = 1;
5317 goto confirm;
5318 }
5319
5320 /* If there already exists link key in local host, leave the
5321 * decision to user space since the remote device could be
5322 * legitimate or malicious.
5323 */
5324 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5325 bt_dev_dbg(hdev, "Local host already has link key");
5326 confirm_hint = 1;
5327 goto confirm;
5328 }
5329
5330 BT_DBG("Auto-accept of user confirmation with %ums delay",
5331 hdev->auto_accept_delay);
5332
5333 if (hdev->auto_accept_delay > 0) {
5334 int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5335 queue_delayed_work(conn->hdev->workqueue,
5336 &conn->auto_accept_work, delay);
5337 goto unlock;
5338 }
5339
5340 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5341 sizeof(ev->bdaddr), &ev->bdaddr);
5342 goto unlock;
5343 }
5344
5345 confirm:
5346 mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5347 le32_to_cpu(ev->passkey), confirm_hint);
5348
5349 unlock:
5350 hci_dev_unlock(hdev);
5351 }
5352
hci_user_passkey_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5353 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5354 struct sk_buff *skb)
5355 {
5356 struct hci_ev_user_passkey_req *ev = data;
5357
5358 bt_dev_dbg(hdev, "");
5359
5360 if (hci_dev_test_flag(hdev, HCI_MGMT))
5361 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5362 }
5363
hci_user_passkey_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5364 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5365 struct sk_buff *skb)
5366 {
5367 struct hci_ev_user_passkey_notify *ev = data;
5368 struct hci_conn *conn;
5369
5370 bt_dev_dbg(hdev, "");
5371
5372 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5373 if (!conn)
5374 return;
5375
5376 conn->passkey_notify = __le32_to_cpu(ev->passkey);
5377 conn->passkey_entered = 0;
5378
5379 if (hci_dev_test_flag(hdev, HCI_MGMT))
5380 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5381 conn->dst_type, conn->passkey_notify,
5382 conn->passkey_entered);
5383 }
5384
hci_keypress_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5385 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5386 struct sk_buff *skb)
5387 {
5388 struct hci_ev_keypress_notify *ev = data;
5389 struct hci_conn *conn;
5390
5391 bt_dev_dbg(hdev, "");
5392
5393 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5394 if (!conn)
5395 return;
5396
5397 switch (ev->type) {
5398 case HCI_KEYPRESS_STARTED:
5399 conn->passkey_entered = 0;
5400 return;
5401
5402 case HCI_KEYPRESS_ENTERED:
5403 conn->passkey_entered++;
5404 break;
5405
5406 case HCI_KEYPRESS_ERASED:
5407 conn->passkey_entered--;
5408 break;
5409
5410 case HCI_KEYPRESS_CLEARED:
5411 conn->passkey_entered = 0;
5412 break;
5413
5414 case HCI_KEYPRESS_COMPLETED:
5415 return;
5416 }
5417
5418 if (hci_dev_test_flag(hdev, HCI_MGMT))
5419 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5420 conn->dst_type, conn->passkey_notify,
5421 conn->passkey_entered);
5422 }
5423
hci_simple_pair_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5424 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5425 struct sk_buff *skb)
5426 {
5427 struct hci_ev_simple_pair_complete *ev = data;
5428 struct hci_conn *conn;
5429
5430 bt_dev_dbg(hdev, "");
5431
5432 hci_dev_lock(hdev);
5433
5434 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5435 if (!conn || !hci_conn_ssp_enabled(conn))
5436 goto unlock;
5437
5438 /* Reset the authentication requirement to unknown */
5439 conn->remote_auth = 0xff;
5440
5441 /* To avoid duplicate auth_failed events to user space we check
5442 * the HCI_CONN_AUTH_PEND flag which will be set if we
5443 * initiated the authentication. A traditional auth_complete
5444 * event gets always produced as initiator and is also mapped to
5445 * the mgmt_auth_failed event */
5446 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5447 mgmt_auth_failed(conn, ev->status);
5448
5449 hci_conn_drop(conn);
5450
5451 unlock:
5452 hci_dev_unlock(hdev);
5453 }
5454
hci_remote_host_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5455 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5456 struct sk_buff *skb)
5457 {
5458 struct hci_ev_remote_host_features *ev = data;
5459 struct inquiry_entry *ie;
5460 struct hci_conn *conn;
5461
5462 bt_dev_dbg(hdev, "");
5463
5464 hci_dev_lock(hdev);
5465
5466 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5467 if (conn)
5468 memcpy(conn->features[1], ev->features, 8);
5469
5470 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5471 if (ie)
5472 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5473
5474 hci_dev_unlock(hdev);
5475 }
5476
hci_remote_oob_data_request_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5477 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5478 struct sk_buff *skb)
5479 {
5480 struct hci_ev_remote_oob_data_request *ev = edata;
5481 struct oob_data *data;
5482
5483 bt_dev_dbg(hdev, "");
5484
5485 hci_dev_lock(hdev);
5486
5487 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5488 goto unlock;
5489
5490 data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5491 if (!data) {
5492 struct hci_cp_remote_oob_data_neg_reply cp;
5493
5494 bacpy(&cp.bdaddr, &ev->bdaddr);
5495 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5496 sizeof(cp), &cp);
5497 goto unlock;
5498 }
5499
5500 if (bredr_sc_enabled(hdev)) {
5501 struct hci_cp_remote_oob_ext_data_reply cp;
5502
5503 bacpy(&cp.bdaddr, &ev->bdaddr);
5504 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5505 memset(cp.hash192, 0, sizeof(cp.hash192));
5506 memset(cp.rand192, 0, sizeof(cp.rand192));
5507 } else {
5508 memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5509 memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5510 }
5511 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5512 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5513
5514 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5515 sizeof(cp), &cp);
5516 } else {
5517 struct hci_cp_remote_oob_data_reply cp;
5518
5519 bacpy(&cp.bdaddr, &ev->bdaddr);
5520 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5521 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5522
5523 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5524 sizeof(cp), &cp);
5525 }
5526
5527 unlock:
5528 hci_dev_unlock(hdev);
5529 }
5530
le_conn_update_addr(struct hci_conn * conn,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * local_rpa)5531 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5532 u8 bdaddr_type, bdaddr_t *local_rpa)
5533 {
5534 if (conn->out) {
5535 conn->dst_type = bdaddr_type;
5536 conn->resp_addr_type = bdaddr_type;
5537 bacpy(&conn->resp_addr, bdaddr);
5538
5539 /* Check if the controller has set a Local RPA then it must be
5540 * used instead or hdev->rpa.
5541 */
5542 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5543 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5544 bacpy(&conn->init_addr, local_rpa);
5545 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5546 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5547 bacpy(&conn->init_addr, &conn->hdev->rpa);
5548 } else {
5549 hci_copy_identity_address(conn->hdev, &conn->init_addr,
5550 &conn->init_addr_type);
5551 }
5552 } else {
5553 conn->resp_addr_type = conn->hdev->adv_addr_type;
5554 /* Check if the controller has set a Local RPA then it must be
5555 * used instead or hdev->rpa.
5556 */
5557 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5558 conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5559 bacpy(&conn->resp_addr, local_rpa);
5560 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5561 /* In case of ext adv, resp_addr will be updated in
5562 * Adv Terminated event.
5563 */
5564 if (!ext_adv_capable(conn->hdev))
5565 bacpy(&conn->resp_addr,
5566 &conn->hdev->random_addr);
5567 } else {
5568 bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5569 }
5570
5571 conn->init_addr_type = bdaddr_type;
5572 bacpy(&conn->init_addr, bdaddr);
5573
5574 /* For incoming connections, set the default minimum
5575 * and maximum connection interval. They will be used
5576 * to check if the parameters are in range and if not
5577 * trigger the connection update procedure.
5578 */
5579 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5580 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5581 }
5582 }
5583
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)5584 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5585 bdaddr_t *bdaddr, u8 bdaddr_type,
5586 bdaddr_t *local_rpa, u8 role, u16 handle,
5587 u16 interval, u16 latency,
5588 u16 supervision_timeout)
5589 {
5590 struct hci_conn_params *params;
5591 struct hci_conn *conn;
5592 struct smp_irk *irk;
5593 u8 addr_type;
5594
5595 hci_dev_lock(hdev);
5596
5597 /* All controllers implicitly stop advertising in the event of a
5598 * connection, so ensure that the state bit is cleared.
5599 */
5600 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5601
5602 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
5603 if (!conn) {
5604 /* In case of error status and there is no connection pending
5605 * just unlock as there is nothing to cleanup.
5606 */
5607 if (status)
5608 goto unlock;
5609
5610 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
5611 if (IS_ERR(conn)) {
5612 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
5613 goto unlock;
5614 }
5615
5616 conn->dst_type = bdaddr_type;
5617
5618 /* If we didn't have a hci_conn object previously
5619 * but we're in central role this must be something
5620 * initiated using an accept list. Since accept list based
5621 * connections are not "first class citizens" we don't
5622 * have full tracking of them. Therefore, we go ahead
5623 * with a "best effort" approach of determining the
5624 * initiator address based on the HCI_PRIVACY flag.
5625 */
5626 if (conn->out) {
5627 conn->resp_addr_type = bdaddr_type;
5628 bacpy(&conn->resp_addr, bdaddr);
5629 if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5630 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5631 bacpy(&conn->init_addr, &hdev->rpa);
5632 } else {
5633 hci_copy_identity_address(hdev,
5634 &conn->init_addr,
5635 &conn->init_addr_type);
5636 }
5637 }
5638 } else {
5639 cancel_delayed_work(&conn->le_conn_timeout);
5640 }
5641
5642 /* The HCI_LE_Connection_Complete event is only sent once per connection.
5643 * Processing it more than once per connection can corrupt kernel memory.
5644 *
5645 * As the connection handle is set here for the first time, it indicates
5646 * whether the connection is already set up.
5647 */
5648 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5649 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5650 goto unlock;
5651 }
5652
5653 le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5654
5655 /* Lookup the identity address from the stored connection
5656 * address and address type.
5657 *
5658 * When establishing connections to an identity address, the
5659 * connection procedure will store the resolvable random
5660 * address first. Now if it can be converted back into the
5661 * identity address, start using the identity address from
5662 * now on.
5663 */
5664 irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5665 if (irk) {
5666 bacpy(&conn->dst, &irk->bdaddr);
5667 conn->dst_type = irk->addr_type;
5668 }
5669
5670 conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5671
5672 /* All connection failure handling is taken care of by the
5673 * hci_conn_failed function which is triggered by the HCI
5674 * request completion callbacks used for connecting.
5675 */
5676 if (status || hci_conn_set_handle(conn, handle))
5677 goto unlock;
5678
5679 /* Drop the connection if it has been aborted */
5680 if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5681 hci_conn_drop(conn);
5682 goto unlock;
5683 }
5684
5685 if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5686 addr_type = BDADDR_LE_PUBLIC;
5687 else
5688 addr_type = BDADDR_LE_RANDOM;
5689
5690 /* Drop the connection if the device is blocked */
5691 if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5692 hci_conn_drop(conn);
5693 goto unlock;
5694 }
5695
5696 mgmt_device_connected(hdev, conn, NULL, 0);
5697
5698 conn->sec_level = BT_SECURITY_LOW;
5699 conn->state = BT_CONFIG;
5700
5701 /* Store current advertising instance as connection advertising instance
5702 * when sotfware rotation is in use so it can be re-enabled when
5703 * disconnected.
5704 */
5705 if (!ext_adv_capable(hdev))
5706 conn->adv_instance = hdev->cur_adv_instance;
5707
5708 conn->le_conn_interval = interval;
5709 conn->le_conn_latency = latency;
5710 conn->le_supv_timeout = supervision_timeout;
5711
5712 hci_debugfs_create_conn(conn);
5713 hci_conn_add_sysfs(conn);
5714
5715 /* The remote features procedure is defined for central
5716 * role only. So only in case of an initiated connection
5717 * request the remote features.
5718 *
5719 * If the local controller supports peripheral-initiated features
5720 * exchange, then requesting the remote features in peripheral
5721 * role is possible. Otherwise just transition into the
5722 * connected state without requesting the remote features.
5723 */
5724 if (conn->out ||
5725 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
5726 struct hci_cp_le_read_remote_features cp;
5727
5728 cp.handle = __cpu_to_le16(conn->handle);
5729
5730 hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
5731 sizeof(cp), &cp);
5732
5733 hci_conn_hold(conn);
5734 } else {
5735 conn->state = BT_CONNECTED;
5736 hci_connect_cfm(conn, status);
5737 }
5738
5739 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
5740 conn->dst_type);
5741 if (params) {
5742 hci_pend_le_list_del_init(params);
5743 if (params->conn) {
5744 hci_conn_drop(params->conn);
5745 hci_conn_put(params->conn);
5746 params->conn = NULL;
5747 }
5748 }
5749
5750 unlock:
5751 hci_update_passive_scan(hdev);
5752 hci_dev_unlock(hdev);
5753 }
5754
hci_le_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5755 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
5756 struct sk_buff *skb)
5757 {
5758 struct hci_ev_le_conn_complete *ev = data;
5759
5760 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5761
5762 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5763 NULL, ev->role, le16_to_cpu(ev->handle),
5764 le16_to_cpu(ev->interval),
5765 le16_to_cpu(ev->latency),
5766 le16_to_cpu(ev->supervision_timeout));
5767 }
5768
hci_le_enh_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5769 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
5770 struct sk_buff *skb)
5771 {
5772 struct hci_ev_le_enh_conn_complete *ev = data;
5773
5774 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5775
5776 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5777 &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
5778 le16_to_cpu(ev->interval),
5779 le16_to_cpu(ev->latency),
5780 le16_to_cpu(ev->supervision_timeout));
5781 }
5782
hci_le_ext_adv_term_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5783 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
5784 struct sk_buff *skb)
5785 {
5786 struct hci_evt_le_ext_adv_set_term *ev = data;
5787 struct hci_conn *conn;
5788 struct adv_info *adv, *n;
5789
5790 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5791
5792 /* The Bluetooth Core 5.3 specification clearly states that this event
5793 * shall not be sent when the Host disables the advertising set. So in
5794 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
5795 *
5796 * When the Host disables an advertising set, all cleanup is done via
5797 * its command callback and not needed to be duplicated here.
5798 */
5799 if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
5800 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
5801 return;
5802 }
5803
5804 hci_dev_lock(hdev);
5805
5806 adv = hci_find_adv_instance(hdev, ev->handle);
5807
5808 if (ev->status) {
5809 if (!adv)
5810 goto unlock;
5811
5812 /* Remove advertising as it has been terminated */
5813 hci_remove_adv_instance(hdev, ev->handle);
5814 mgmt_advertising_removed(NULL, hdev, ev->handle);
5815
5816 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
5817 if (adv->enabled)
5818 goto unlock;
5819 }
5820
5821 /* We are no longer advertising, clear HCI_LE_ADV */
5822 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5823 goto unlock;
5824 }
5825
5826 if (adv)
5827 adv->enabled = false;
5828
5829 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
5830 if (conn) {
5831 /* Store handle in the connection so the correct advertising
5832 * instance can be re-enabled when disconnected.
5833 */
5834 conn->adv_instance = ev->handle;
5835
5836 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
5837 bacmp(&conn->resp_addr, BDADDR_ANY))
5838 goto unlock;
5839
5840 if (!ev->handle) {
5841 bacpy(&conn->resp_addr, &hdev->random_addr);
5842 goto unlock;
5843 }
5844
5845 if (adv)
5846 bacpy(&conn->resp_addr, &adv->random_addr);
5847 }
5848
5849 unlock:
5850 hci_dev_unlock(hdev);
5851 }
5852
hci_le_conn_update_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5853 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
5854 struct sk_buff *skb)
5855 {
5856 struct hci_ev_le_conn_update_complete *ev = data;
5857 struct hci_conn *conn;
5858
5859 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5860
5861 if (ev->status)
5862 return;
5863
5864 hci_dev_lock(hdev);
5865
5866 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5867 if (conn) {
5868 conn->le_conn_interval = le16_to_cpu(ev->interval);
5869 conn->le_conn_latency = le16_to_cpu(ev->latency);
5870 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
5871 }
5872
5873 hci_dev_unlock(hdev);
5874 }
5875
5876 /* 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)5877 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
5878 bdaddr_t *addr,
5879 u8 addr_type, bool addr_resolved,
5880 u8 adv_type)
5881 {
5882 struct hci_conn *conn;
5883 struct hci_conn_params *params;
5884
5885 /* If the event is not connectable don't proceed further */
5886 if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
5887 return NULL;
5888
5889 /* Ignore if the device is blocked or hdev is suspended */
5890 if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
5891 hdev->suspended)
5892 return NULL;
5893
5894 /* Most controller will fail if we try to create new connections
5895 * while we have an existing one in peripheral role.
5896 */
5897 if (hdev->conn_hash.le_num_peripheral > 0 &&
5898 (!test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) ||
5899 !(hdev->le_states[3] & 0x10)))
5900 return NULL;
5901
5902 /* If we're not connectable only connect devices that we have in
5903 * our pend_le_conns list.
5904 */
5905 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
5906 addr_type);
5907 if (!params)
5908 return NULL;
5909
5910 if (!params->explicit_connect) {
5911 switch (params->auto_connect) {
5912 case HCI_AUTO_CONN_DIRECT:
5913 /* Only devices advertising with ADV_DIRECT_IND are
5914 * triggering a connection attempt. This is allowing
5915 * incoming connections from peripheral devices.
5916 */
5917 if (adv_type != LE_ADV_DIRECT_IND)
5918 return NULL;
5919 break;
5920 case HCI_AUTO_CONN_ALWAYS:
5921 /* Devices advertising with ADV_IND or ADV_DIRECT_IND
5922 * are triggering a connection attempt. This means
5923 * that incoming connections from peripheral device are
5924 * accepted and also outgoing connections to peripheral
5925 * devices are established when found.
5926 */
5927 break;
5928 default:
5929 return NULL;
5930 }
5931 }
5932
5933 conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
5934 BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
5935 HCI_ROLE_MASTER);
5936 if (!IS_ERR(conn)) {
5937 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
5938 * by higher layer that tried to connect, if no then
5939 * store the pointer since we don't really have any
5940 * other owner of the object besides the params that
5941 * triggered it. This way we can abort the connection if
5942 * the parameters get removed and keep the reference
5943 * count consistent once the connection is established.
5944 */
5945
5946 if (!params->explicit_connect)
5947 params->conn = hci_conn_get(conn);
5948
5949 return conn;
5950 }
5951
5952 switch (PTR_ERR(conn)) {
5953 case -EBUSY:
5954 /* If hci_connect() returns -EBUSY it means there is already
5955 * an LE connection attempt going on. Since controllers don't
5956 * support more than one connection attempt at the time, we
5957 * don't consider this an error case.
5958 */
5959 break;
5960 default:
5961 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
5962 return NULL;
5963 }
5964
5965 return NULL;
5966 }
5967
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)5968 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
5969 u8 bdaddr_type, bdaddr_t *direct_addr,
5970 u8 direct_addr_type, s8 rssi, u8 *data, u8 len,
5971 bool ext_adv, bool ctl_time, u64 instant)
5972 {
5973 struct discovery_state *d = &hdev->discovery;
5974 struct smp_irk *irk;
5975 struct hci_conn *conn;
5976 bool match, bdaddr_resolved;
5977 u32 flags;
5978 u8 *ptr;
5979
5980 switch (type) {
5981 case LE_ADV_IND:
5982 case LE_ADV_DIRECT_IND:
5983 case LE_ADV_SCAN_IND:
5984 case LE_ADV_NONCONN_IND:
5985 case LE_ADV_SCAN_RSP:
5986 break;
5987 default:
5988 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
5989 "type: 0x%02x", type);
5990 return;
5991 }
5992
5993 if (len > max_adv_len(hdev)) {
5994 bt_dev_err_ratelimited(hdev,
5995 "adv larger than maximum supported");
5996 return;
5997 }
5998
5999 /* Find the end of the data in case the report contains padded zero
6000 * bytes at the end causing an invalid length value.
6001 *
6002 * When data is NULL, len is 0 so there is no need for extra ptr
6003 * check as 'ptr < data + 0' is already false in such case.
6004 */
6005 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6006 if (ptr + 1 + *ptr > data + len)
6007 break;
6008 }
6009
6010 /* Adjust for actual length. This handles the case when remote
6011 * device is advertising with incorrect data length.
6012 */
6013 len = ptr - data;
6014
6015 /* If the direct address is present, then this report is from
6016 * a LE Direct Advertising Report event. In that case it is
6017 * important to see if the address is matching the local
6018 * controller address.
6019 */
6020 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr) {
6021 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6022 &bdaddr_resolved);
6023
6024 /* Only resolvable random addresses are valid for these
6025 * kind of reports and others can be ignored.
6026 */
6027 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6028 return;
6029
6030 /* If the controller is not using resolvable random
6031 * addresses, then this report can be ignored.
6032 */
6033 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
6034 return;
6035
6036 /* If the local IRK of the controller does not match
6037 * with the resolvable random address provided, then
6038 * this report can be ignored.
6039 */
6040 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6041 return;
6042 }
6043
6044 /* Check if we need to convert to identity address */
6045 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6046 if (irk) {
6047 bdaddr = &irk->bdaddr;
6048 bdaddr_type = irk->addr_type;
6049 }
6050
6051 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6052
6053 /* Check if we have been requested to connect to this device.
6054 *
6055 * direct_addr is set only for directed advertising reports (it is NULL
6056 * for advertising reports) and is already verified to be RPA above.
6057 */
6058 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6059 type);
6060 if (!ext_adv && conn && type == LE_ADV_IND &&
6061 len <= max_adv_len(hdev)) {
6062 /* Store report for later inclusion by
6063 * mgmt_device_connected
6064 */
6065 memcpy(conn->le_adv_data, data, len);
6066 conn->le_adv_data_len = len;
6067 }
6068
6069 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6070 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6071 else
6072 flags = 0;
6073
6074 /* All scan results should be sent up for Mesh systems */
6075 if (hci_dev_test_flag(hdev, HCI_MESH)) {
6076 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6077 rssi, flags, data, len, NULL, 0, instant);
6078 return;
6079 }
6080
6081 /* Passive scanning shouldn't trigger any device found events,
6082 * except for devices marked as CONN_REPORT for which we do send
6083 * device found events, or advertisement monitoring requested.
6084 */
6085 if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6086 if (type == LE_ADV_DIRECT_IND)
6087 return;
6088
6089 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6090 bdaddr, bdaddr_type) &&
6091 idr_is_empty(&hdev->adv_monitors_idr))
6092 return;
6093
6094 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6095 rssi, flags, data, len, NULL, 0, 0);
6096 return;
6097 }
6098
6099 /* When receiving a scan response, then there is no way to
6100 * know if the remote device is connectable or not. However
6101 * since scan responses are merged with a previously seen
6102 * advertising report, the flags field from that report
6103 * will be used.
6104 *
6105 * In the unlikely case that a controller just sends a scan
6106 * response event that doesn't match the pending report, then
6107 * it is marked as a standalone SCAN_RSP.
6108 */
6109 if (type == LE_ADV_SCAN_RSP)
6110 flags = MGMT_DEV_FOUND_SCAN_RSP;
6111
6112 /* If there's nothing pending either store the data from this
6113 * event or send an immediate device found event if the data
6114 * should not be stored for later.
6115 */
6116 if (!has_pending_adv_report(hdev)) {
6117 /* If the report will trigger a SCAN_REQ store it for
6118 * later merging.
6119 */
6120 if (!ext_adv && (type == LE_ADV_IND ||
6121 type == LE_ADV_SCAN_IND)) {
6122 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6123 rssi, flags, data, len);
6124 return;
6125 }
6126
6127 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6128 rssi, flags, data, len, NULL, 0, 0);
6129 return;
6130 }
6131
6132 /* Check if the pending report is for the same device as the new one */
6133 match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6134 bdaddr_type == d->last_adv_addr_type);
6135
6136 /* If the pending data doesn't match this report or this isn't a
6137 * scan response (e.g. we got a duplicate ADV_IND) then force
6138 * sending of the pending data.
6139 */
6140 if (type != LE_ADV_SCAN_RSP || !match) {
6141 /* Send out whatever is in the cache, but skip duplicates */
6142 if (!match)
6143 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6144 d->last_adv_addr_type, NULL,
6145 d->last_adv_rssi, d->last_adv_flags,
6146 d->last_adv_data,
6147 d->last_adv_data_len, NULL, 0, 0);
6148
6149 /* If the new report will trigger a SCAN_REQ store it for
6150 * later merging.
6151 */
6152 if (!ext_adv && (type == LE_ADV_IND ||
6153 type == LE_ADV_SCAN_IND)) {
6154 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6155 rssi, flags, data, len);
6156 return;
6157 }
6158
6159 /* The advertising reports cannot be merged, so clear
6160 * the pending report and send out a device found event.
6161 */
6162 clear_pending_adv_report(hdev);
6163 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6164 rssi, flags, data, len, NULL, 0, 0);
6165 return;
6166 }
6167
6168 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6169 * the new event is a SCAN_RSP. We can therefore proceed with
6170 * sending a merged device found event.
6171 */
6172 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6173 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6174 d->last_adv_data, d->last_adv_data_len, data, len, 0);
6175 clear_pending_adv_report(hdev);
6176 }
6177
hci_le_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6178 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6179 struct sk_buff *skb)
6180 {
6181 struct hci_ev_le_advertising_report *ev = data;
6182 u64 instant = jiffies;
6183
6184 if (!ev->num)
6185 return;
6186
6187 hci_dev_lock(hdev);
6188
6189 while (ev->num--) {
6190 struct hci_ev_le_advertising_info *info;
6191 s8 rssi;
6192
6193 info = hci_le_ev_skb_pull(hdev, skb,
6194 HCI_EV_LE_ADVERTISING_REPORT,
6195 sizeof(*info));
6196 if (!info)
6197 break;
6198
6199 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6200 info->length + 1))
6201 break;
6202
6203 if (info->length <= max_adv_len(hdev)) {
6204 rssi = info->data[info->length];
6205 process_adv_report(hdev, info->type, &info->bdaddr,
6206 info->bdaddr_type, NULL, 0, rssi,
6207 info->data, info->length, false,
6208 false, instant);
6209 } else {
6210 bt_dev_err(hdev, "Dropping invalid advertising data");
6211 }
6212 }
6213
6214 hci_dev_unlock(hdev);
6215 }
6216
ext_evt_type_to_legacy(struct hci_dev * hdev,u16 evt_type)6217 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6218 {
6219 if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6220 switch (evt_type) {
6221 case LE_LEGACY_ADV_IND:
6222 return LE_ADV_IND;
6223 case LE_LEGACY_ADV_DIRECT_IND:
6224 return LE_ADV_DIRECT_IND;
6225 case LE_LEGACY_ADV_SCAN_IND:
6226 return LE_ADV_SCAN_IND;
6227 case LE_LEGACY_NONCONN_IND:
6228 return LE_ADV_NONCONN_IND;
6229 case LE_LEGACY_SCAN_RSP_ADV:
6230 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6231 return LE_ADV_SCAN_RSP;
6232 }
6233
6234 goto invalid;
6235 }
6236
6237 if (evt_type & LE_EXT_ADV_CONN_IND) {
6238 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6239 return LE_ADV_DIRECT_IND;
6240
6241 return LE_ADV_IND;
6242 }
6243
6244 if (evt_type & LE_EXT_ADV_SCAN_RSP)
6245 return LE_ADV_SCAN_RSP;
6246
6247 if (evt_type & LE_EXT_ADV_SCAN_IND)
6248 return LE_ADV_SCAN_IND;
6249
6250 if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6251 evt_type & LE_EXT_ADV_DIRECT_IND)
6252 return LE_ADV_NONCONN_IND;
6253
6254 invalid:
6255 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6256 evt_type);
6257
6258 return LE_ADV_INVALID;
6259 }
6260
hci_le_ext_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6261 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6262 struct sk_buff *skb)
6263 {
6264 struct hci_ev_le_ext_adv_report *ev = data;
6265 u64 instant = jiffies;
6266
6267 if (!ev->num)
6268 return;
6269
6270 hci_dev_lock(hdev);
6271
6272 while (ev->num--) {
6273 struct hci_ev_le_ext_adv_info *info;
6274 u8 legacy_evt_type;
6275 u16 evt_type;
6276
6277 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6278 sizeof(*info));
6279 if (!info)
6280 break;
6281
6282 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6283 info->length))
6284 break;
6285
6286 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6287 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6288 if (legacy_evt_type != LE_ADV_INVALID) {
6289 process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6290 info->bdaddr_type, NULL, 0,
6291 info->rssi, info->data, info->length,
6292 !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6293 false, instant);
6294 }
6295 }
6296
6297 hci_dev_unlock(hdev);
6298 }
6299
hci_le_pa_term_sync(struct hci_dev * hdev,__le16 handle)6300 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6301 {
6302 struct hci_cp_le_pa_term_sync cp;
6303
6304 memset(&cp, 0, sizeof(cp));
6305 cp.handle = handle;
6306
6307 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6308 }
6309
hci_le_pa_sync_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6310 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6311 struct sk_buff *skb)
6312 {
6313 struct hci_ev_le_pa_sync_established *ev = data;
6314 int mask = hdev->link_mode;
6315 __u8 flags = 0;
6316 struct hci_conn *pa_sync;
6317
6318 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6319
6320 hci_dev_lock(hdev);
6321
6322 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6323
6324 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags);
6325 if (!(mask & HCI_LM_ACCEPT)) {
6326 hci_le_pa_term_sync(hdev, ev->handle);
6327 goto unlock;
6328 }
6329
6330 if (!(flags & HCI_PROTO_DEFER))
6331 goto unlock;
6332
6333 if (ev->status) {
6334 /* Add connection to indicate the failed PA sync event */
6335 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6336 HCI_ROLE_SLAVE);
6337
6338 if (!pa_sync)
6339 goto unlock;
6340
6341 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6342
6343 /* Notify iso layer */
6344 hci_connect_cfm(pa_sync, ev->status);
6345 }
6346
6347 unlock:
6348 hci_dev_unlock(hdev);
6349 }
6350
hci_le_per_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6351 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6352 struct sk_buff *skb)
6353 {
6354 struct hci_ev_le_per_adv_report *ev = data;
6355 int mask = hdev->link_mode;
6356 __u8 flags = 0;
6357
6358 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6359
6360 hci_dev_lock(hdev);
6361
6362 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6363 if (!(mask & HCI_LM_ACCEPT))
6364 hci_le_pa_term_sync(hdev, ev->sync_handle);
6365
6366 hci_dev_unlock(hdev);
6367 }
6368
hci_le_remote_feat_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6369 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6370 struct sk_buff *skb)
6371 {
6372 struct hci_ev_le_remote_feat_complete *ev = data;
6373 struct hci_conn *conn;
6374
6375 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6376
6377 hci_dev_lock(hdev);
6378
6379 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6380 if (conn) {
6381 if (!ev->status)
6382 memcpy(conn->features[0], ev->features, 8);
6383
6384 if (conn->state == BT_CONFIG) {
6385 __u8 status;
6386
6387 /* If the local controller supports peripheral-initiated
6388 * features exchange, but the remote controller does
6389 * not, then it is possible that the error code 0x1a
6390 * for unsupported remote feature gets returned.
6391 *
6392 * In this specific case, allow the connection to
6393 * transition into connected state and mark it as
6394 * successful.
6395 */
6396 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE &&
6397 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6398 status = 0x00;
6399 else
6400 status = ev->status;
6401
6402 conn->state = BT_CONNECTED;
6403 hci_connect_cfm(conn, status);
6404 hci_conn_drop(conn);
6405 }
6406 }
6407
6408 hci_dev_unlock(hdev);
6409 }
6410
hci_le_ltk_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6411 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6412 struct sk_buff *skb)
6413 {
6414 struct hci_ev_le_ltk_req *ev = data;
6415 struct hci_cp_le_ltk_reply cp;
6416 struct hci_cp_le_ltk_neg_reply neg;
6417 struct hci_conn *conn;
6418 struct smp_ltk *ltk;
6419
6420 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6421
6422 hci_dev_lock(hdev);
6423
6424 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6425 if (conn == NULL)
6426 goto not_found;
6427
6428 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6429 if (!ltk)
6430 goto not_found;
6431
6432 if (smp_ltk_is_sc(ltk)) {
6433 /* With SC both EDiv and Rand are set to zero */
6434 if (ev->ediv || ev->rand)
6435 goto not_found;
6436 } else {
6437 /* For non-SC keys check that EDiv and Rand match */
6438 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6439 goto not_found;
6440 }
6441
6442 memcpy(cp.ltk, ltk->val, ltk->enc_size);
6443 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6444 cp.handle = cpu_to_le16(conn->handle);
6445
6446 conn->pending_sec_level = smp_ltk_sec_level(ltk);
6447
6448 conn->enc_key_size = ltk->enc_size;
6449
6450 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6451
6452 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6453 * temporary key used to encrypt a connection following
6454 * pairing. It is used during the Encrypted Session Setup to
6455 * distribute the keys. Later, security can be re-established
6456 * using a distributed LTK.
6457 */
6458 if (ltk->type == SMP_STK) {
6459 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6460 list_del_rcu(<k->list);
6461 kfree_rcu(ltk, rcu);
6462 } else {
6463 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6464 }
6465
6466 hci_dev_unlock(hdev);
6467
6468 return;
6469
6470 not_found:
6471 neg.handle = ev->handle;
6472 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6473 hci_dev_unlock(hdev);
6474 }
6475
send_conn_param_neg_reply(struct hci_dev * hdev,u16 handle,u8 reason)6476 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6477 u8 reason)
6478 {
6479 struct hci_cp_le_conn_param_req_neg_reply cp;
6480
6481 cp.handle = cpu_to_le16(handle);
6482 cp.reason = reason;
6483
6484 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6485 &cp);
6486 }
6487
hci_le_remote_conn_param_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6488 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6489 struct sk_buff *skb)
6490 {
6491 struct hci_ev_le_remote_conn_param_req *ev = data;
6492 struct hci_cp_le_conn_param_req_reply cp;
6493 struct hci_conn *hcon;
6494 u16 handle, min, max, latency, timeout;
6495
6496 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6497
6498 handle = le16_to_cpu(ev->handle);
6499 min = le16_to_cpu(ev->interval_min);
6500 max = le16_to_cpu(ev->interval_max);
6501 latency = le16_to_cpu(ev->latency);
6502 timeout = le16_to_cpu(ev->timeout);
6503
6504 hcon = hci_conn_hash_lookup_handle(hdev, handle);
6505 if (!hcon || hcon->state != BT_CONNECTED)
6506 return send_conn_param_neg_reply(hdev, handle,
6507 HCI_ERROR_UNKNOWN_CONN_ID);
6508
6509 if (max > hcon->le_conn_max_interval)
6510 return send_conn_param_neg_reply(hdev, handle,
6511 HCI_ERROR_INVALID_LL_PARAMS);
6512
6513 if (hci_check_conn_params(min, max, latency, timeout))
6514 return send_conn_param_neg_reply(hdev, handle,
6515 HCI_ERROR_INVALID_LL_PARAMS);
6516
6517 if (hcon->role == HCI_ROLE_MASTER) {
6518 struct hci_conn_params *params;
6519 u8 store_hint;
6520
6521 hci_dev_lock(hdev);
6522
6523 params = hci_conn_params_lookup(hdev, &hcon->dst,
6524 hcon->dst_type);
6525 if (params) {
6526 params->conn_min_interval = min;
6527 params->conn_max_interval = max;
6528 params->conn_latency = latency;
6529 params->supervision_timeout = timeout;
6530 store_hint = 0x01;
6531 } else {
6532 store_hint = 0x00;
6533 }
6534
6535 hci_dev_unlock(hdev);
6536
6537 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6538 store_hint, min, max, latency, timeout);
6539 }
6540
6541 cp.handle = ev->handle;
6542 cp.interval_min = ev->interval_min;
6543 cp.interval_max = ev->interval_max;
6544 cp.latency = ev->latency;
6545 cp.timeout = ev->timeout;
6546 cp.min_ce_len = 0;
6547 cp.max_ce_len = 0;
6548
6549 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6550 }
6551
hci_le_direct_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6552 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6553 struct sk_buff *skb)
6554 {
6555 struct hci_ev_le_direct_adv_report *ev = data;
6556 u64 instant = jiffies;
6557 int i;
6558
6559 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6560 flex_array_size(ev, info, ev->num)))
6561 return;
6562
6563 if (!ev->num)
6564 return;
6565
6566 hci_dev_lock(hdev);
6567
6568 for (i = 0; i < ev->num; i++) {
6569 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6570
6571 process_adv_report(hdev, info->type, &info->bdaddr,
6572 info->bdaddr_type, &info->direct_addr,
6573 info->direct_addr_type, info->rssi, NULL, 0,
6574 false, false, instant);
6575 }
6576
6577 hci_dev_unlock(hdev);
6578 }
6579
hci_le_phy_update_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6580 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6581 struct sk_buff *skb)
6582 {
6583 struct hci_ev_le_phy_update_complete *ev = data;
6584 struct hci_conn *conn;
6585
6586 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6587
6588 if (ev->status)
6589 return;
6590
6591 hci_dev_lock(hdev);
6592
6593 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6594 if (!conn)
6595 goto unlock;
6596
6597 conn->le_tx_phy = ev->tx_phy;
6598 conn->le_rx_phy = ev->rx_phy;
6599
6600 unlock:
6601 hci_dev_unlock(hdev);
6602 }
6603
hci_le_cis_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6604 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6605 struct sk_buff *skb)
6606 {
6607 struct hci_evt_le_cis_established *ev = data;
6608 struct hci_conn *conn;
6609 struct bt_iso_qos *qos;
6610 bool pending = false;
6611 u16 handle = __le16_to_cpu(ev->handle);
6612 u32 c_sdu_interval, p_sdu_interval;
6613
6614 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6615
6616 hci_dev_lock(hdev);
6617
6618 conn = hci_conn_hash_lookup_handle(hdev, handle);
6619 if (!conn) {
6620 bt_dev_err(hdev,
6621 "Unable to find connection with handle 0x%4.4x",
6622 handle);
6623 goto unlock;
6624 }
6625
6626 if (conn->type != ISO_LINK) {
6627 bt_dev_err(hdev,
6628 "Invalid connection link type handle 0x%4.4x",
6629 handle);
6630 goto unlock;
6631 }
6632
6633 qos = &conn->iso_qos;
6634
6635 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6636
6637 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part G
6638 * page 3075:
6639 * Transport_Latency_C_To_P = CIG_Sync_Delay + (FT_C_To_P) ×
6640 * ISO_Interval + SDU_Interval_C_To_P
6641 * ...
6642 * SDU_Interval = (CIG_Sync_Delay + (FT) x ISO_Interval) -
6643 * Transport_Latency
6644 */
6645 c_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6646 (ev->c_ft * le16_to_cpu(ev->interval) * 1250)) -
6647 get_unaligned_le24(ev->c_latency);
6648 p_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6649 (ev->p_ft * le16_to_cpu(ev->interval) * 1250)) -
6650 get_unaligned_le24(ev->p_latency);
6651
6652 switch (conn->role) {
6653 case HCI_ROLE_SLAVE:
6654 qos->ucast.in.interval = c_sdu_interval;
6655 qos->ucast.out.interval = p_sdu_interval;
6656 /* Convert Transport Latency (us) to Latency (msec) */
6657 qos->ucast.in.latency =
6658 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6659 1000);
6660 qos->ucast.out.latency =
6661 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6662 1000);
6663 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6664 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6665 qos->ucast.in.phy = ev->c_phy;
6666 qos->ucast.out.phy = ev->p_phy;
6667 break;
6668 case HCI_ROLE_MASTER:
6669 qos->ucast.in.interval = p_sdu_interval;
6670 qos->ucast.out.interval = c_sdu_interval;
6671 /* Convert Transport Latency (us) to Latency (msec) */
6672 qos->ucast.out.latency =
6673 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6674 1000);
6675 qos->ucast.in.latency =
6676 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6677 1000);
6678 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6679 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6680 qos->ucast.out.phy = ev->c_phy;
6681 qos->ucast.in.phy = ev->p_phy;
6682 break;
6683 }
6684
6685 if (!ev->status) {
6686 conn->state = BT_CONNECTED;
6687 hci_debugfs_create_conn(conn);
6688 hci_conn_add_sysfs(conn);
6689 hci_iso_setup_path(conn);
6690 goto unlock;
6691 }
6692
6693 conn->state = BT_CLOSED;
6694 hci_connect_cfm(conn, ev->status);
6695 hci_conn_del(conn);
6696
6697 unlock:
6698 if (pending)
6699 hci_le_create_cis_pending(hdev);
6700
6701 hci_dev_unlock(hdev);
6702 }
6703
hci_le_reject_cis(struct hci_dev * hdev,__le16 handle)6704 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6705 {
6706 struct hci_cp_le_reject_cis cp;
6707
6708 memset(&cp, 0, sizeof(cp));
6709 cp.handle = handle;
6710 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6711 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6712 }
6713
hci_le_accept_cis(struct hci_dev * hdev,__le16 handle)6714 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6715 {
6716 struct hci_cp_le_accept_cis cp;
6717
6718 memset(&cp, 0, sizeof(cp));
6719 cp.handle = handle;
6720 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6721 }
6722
hci_le_cis_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6723 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6724 struct sk_buff *skb)
6725 {
6726 struct hci_evt_le_cis_req *ev = data;
6727 u16 acl_handle, cis_handle;
6728 struct hci_conn *acl, *cis;
6729 int mask;
6730 __u8 flags = 0;
6731
6732 acl_handle = __le16_to_cpu(ev->acl_handle);
6733 cis_handle = __le16_to_cpu(ev->cis_handle);
6734
6735 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
6736 acl_handle, cis_handle, ev->cig_id, ev->cis_id);
6737
6738 hci_dev_lock(hdev);
6739
6740 acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
6741 if (!acl)
6742 goto unlock;
6743
6744 mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
6745 if (!(mask & HCI_LM_ACCEPT)) {
6746 hci_le_reject_cis(hdev, ev->cis_handle);
6747 goto unlock;
6748 }
6749
6750 cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
6751 if (!cis) {
6752 cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
6753 cis_handle);
6754 if (IS_ERR(cis)) {
6755 hci_le_reject_cis(hdev, ev->cis_handle);
6756 goto unlock;
6757 }
6758 }
6759
6760 cis->iso_qos.ucast.cig = ev->cig_id;
6761 cis->iso_qos.ucast.cis = ev->cis_id;
6762
6763 if (!(flags & HCI_PROTO_DEFER)) {
6764 hci_le_accept_cis(hdev, ev->cis_handle);
6765 } else {
6766 cis->state = BT_CONNECT2;
6767 hci_connect_cfm(cis, 0);
6768 }
6769
6770 unlock:
6771 hci_dev_unlock(hdev);
6772 }
6773
hci_iso_term_big_sync(struct hci_dev * hdev,void * data)6774 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
6775 {
6776 u8 handle = PTR_UINT(data);
6777
6778 return hci_le_terminate_big_sync(hdev, handle,
6779 HCI_ERROR_LOCAL_HOST_TERM);
6780 }
6781
hci_le_create_big_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6782 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
6783 struct sk_buff *skb)
6784 {
6785 struct hci_evt_le_create_big_complete *ev = data;
6786 struct hci_conn *conn;
6787 __u8 i = 0;
6788
6789 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
6790
6791 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
6792 flex_array_size(ev, bis_handle, ev->num_bis)))
6793 return;
6794
6795 hci_dev_lock(hdev);
6796
6797 /* Connect all BISes that are bound to the BIG */
6798 while ((conn = hci_conn_hash_lookup_big_state(hdev, ev->handle,
6799 BT_BOUND))) {
6800 if (ev->status) {
6801 hci_connect_cfm(conn, ev->status);
6802 hci_conn_del(conn);
6803 continue;
6804 }
6805
6806 if (hci_conn_set_handle(conn,
6807 __le16_to_cpu(ev->bis_handle[i++])))
6808 continue;
6809
6810 conn->state = BT_CONNECTED;
6811 set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
6812 hci_debugfs_create_conn(conn);
6813 hci_conn_add_sysfs(conn);
6814 hci_iso_setup_path(conn);
6815 }
6816
6817 if (!ev->status && !i)
6818 /* If no BISes have been connected for the BIG,
6819 * terminate. This is in case all bound connections
6820 * have been closed before the BIG creation
6821 * has completed.
6822 */
6823 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
6824 UINT_PTR(ev->handle), NULL);
6825
6826 hci_dev_unlock(hdev);
6827 }
6828
hci_le_big_sync_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6829 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
6830 struct sk_buff *skb)
6831 {
6832 struct hci_evt_le_big_sync_estabilished *ev = data;
6833 struct hci_conn *bis;
6834 struct hci_conn *pa_sync;
6835 int i;
6836
6837 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6838
6839 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
6840 flex_array_size(ev, bis, ev->num_bis)))
6841 return;
6842
6843 hci_dev_lock(hdev);
6844
6845 if (!ev->status) {
6846 pa_sync = hci_conn_hash_lookup_pa_sync_big_handle(hdev, ev->handle);
6847 if (pa_sync)
6848 /* Also mark the BIG sync established event on the
6849 * associated PA sync hcon
6850 */
6851 set_bit(HCI_CONN_BIG_SYNC, &pa_sync->flags);
6852 }
6853
6854 for (i = 0; i < ev->num_bis; i++) {
6855 u16 handle = le16_to_cpu(ev->bis[i]);
6856 __le32 interval;
6857
6858 bis = hci_conn_hash_lookup_handle(hdev, handle);
6859 if (!bis) {
6860 if (handle > HCI_CONN_HANDLE_MAX) {
6861 bt_dev_dbg(hdev, "ignore too large handle %u", handle);
6862 continue;
6863 }
6864 bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
6865 HCI_ROLE_SLAVE, handle);
6866 if (IS_ERR(bis))
6867 continue;
6868 }
6869
6870 if (ev->status != 0x42)
6871 /* Mark PA sync as established */
6872 set_bit(HCI_CONN_PA_SYNC, &bis->flags);
6873
6874 bis->iso_qos.bcast.big = ev->handle;
6875 memset(&interval, 0, sizeof(interval));
6876 memcpy(&interval, ev->latency, sizeof(ev->latency));
6877 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
6878 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
6879 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
6880 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
6881
6882 if (!ev->status) {
6883 bis->state = BT_CONNECTED;
6884 set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
6885 hci_debugfs_create_conn(bis);
6886 hci_conn_add_sysfs(bis);
6887 hci_iso_setup_path(bis);
6888 }
6889 }
6890
6891 /* In case BIG sync failed, notify each failed connection to
6892 * the user after all hci connections have been added
6893 */
6894 if (ev->status)
6895 for (i = 0; i < ev->num_bis; i++) {
6896 u16 handle = le16_to_cpu(ev->bis[i]);
6897
6898 bis = hci_conn_hash_lookup_handle(hdev, handle);
6899 if (!bis)
6900 continue;
6901
6902 set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
6903 hci_connect_cfm(bis, ev->status);
6904 }
6905
6906 hci_dev_unlock(hdev);
6907 }
6908
hci_le_big_info_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6909 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
6910 struct sk_buff *skb)
6911 {
6912 struct hci_evt_le_big_info_adv_report *ev = data;
6913 int mask = hdev->link_mode;
6914 __u8 flags = 0;
6915 struct hci_conn *pa_sync;
6916
6917 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6918
6919 hci_dev_lock(hdev);
6920
6921 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6922 if (!(mask & HCI_LM_ACCEPT)) {
6923 hci_le_pa_term_sync(hdev, ev->sync_handle);
6924 goto unlock;
6925 }
6926
6927 if (!(flags & HCI_PROTO_DEFER))
6928 goto unlock;
6929
6930 pa_sync = hci_conn_hash_lookup_pa_sync_handle
6931 (hdev,
6932 le16_to_cpu(ev->sync_handle));
6933
6934 if (pa_sync)
6935 goto unlock;
6936
6937 /* Add connection to indicate the PA sync event */
6938 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6939 HCI_ROLE_SLAVE);
6940
6941 if (IS_ERR(pa_sync))
6942 goto unlock;
6943
6944 pa_sync->sync_handle = le16_to_cpu(ev->sync_handle);
6945 set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags);
6946
6947 /* Notify iso layer */
6948 hci_connect_cfm(pa_sync, 0x00);
6949
6950 /* Notify MGMT layer */
6951 mgmt_device_connected(hdev, pa_sync, NULL, 0);
6952
6953 unlock:
6954 hci_dev_unlock(hdev);
6955 }
6956
6957 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
6958 [_op] = { \
6959 .func = _func, \
6960 .min_len = _min_len, \
6961 .max_len = _max_len, \
6962 }
6963
6964 #define HCI_LE_EV(_op, _func, _len) \
6965 HCI_LE_EV_VL(_op, _func, _len, _len)
6966
6967 #define HCI_LE_EV_STATUS(_op, _func) \
6968 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
6969
6970 /* Entries in this table shall have their position according to the subevent
6971 * opcode they handle so the use of the macros above is recommend since it does
6972 * attempt to initialize at its proper index using Designated Initializers that
6973 * way events without a callback function can be ommited.
6974 */
6975 static const struct hci_le_ev {
6976 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
6977 u16 min_len;
6978 u16 max_len;
6979 } hci_le_ev_table[U8_MAX + 1] = {
6980 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
6981 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
6982 sizeof(struct hci_ev_le_conn_complete)),
6983 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
6984 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
6985 sizeof(struct hci_ev_le_advertising_report),
6986 HCI_MAX_EVENT_SIZE),
6987 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
6988 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
6989 hci_le_conn_update_complete_evt,
6990 sizeof(struct hci_ev_le_conn_update_complete)),
6991 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
6992 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
6993 hci_le_remote_feat_complete_evt,
6994 sizeof(struct hci_ev_le_remote_feat_complete)),
6995 /* [0x05 = HCI_EV_LE_LTK_REQ] */
6996 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
6997 sizeof(struct hci_ev_le_ltk_req)),
6998 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
6999 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7000 hci_le_remote_conn_param_req_evt,
7001 sizeof(struct hci_ev_le_remote_conn_param_req)),
7002 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7003 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7004 hci_le_enh_conn_complete_evt,
7005 sizeof(struct hci_ev_le_enh_conn_complete)),
7006 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7007 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7008 sizeof(struct hci_ev_le_direct_adv_report),
7009 HCI_MAX_EVENT_SIZE),
7010 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7011 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7012 sizeof(struct hci_ev_le_phy_update_complete)),
7013 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7014 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7015 sizeof(struct hci_ev_le_ext_adv_report),
7016 HCI_MAX_EVENT_SIZE),
7017 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7018 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7019 hci_le_pa_sync_estabilished_evt,
7020 sizeof(struct hci_ev_le_pa_sync_established)),
7021 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7022 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7023 hci_le_per_adv_report_evt,
7024 sizeof(struct hci_ev_le_per_adv_report),
7025 HCI_MAX_EVENT_SIZE),
7026 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7027 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7028 sizeof(struct hci_evt_le_ext_adv_set_term)),
7029 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7030 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7031 sizeof(struct hci_evt_le_cis_established)),
7032 /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7033 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7034 sizeof(struct hci_evt_le_cis_req)),
7035 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7036 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7037 hci_le_create_big_complete_evt,
7038 sizeof(struct hci_evt_le_create_big_complete),
7039 HCI_MAX_EVENT_SIZE),
7040 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABILISHED] */
7041 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7042 hci_le_big_sync_established_evt,
7043 sizeof(struct hci_evt_le_big_sync_estabilished),
7044 HCI_MAX_EVENT_SIZE),
7045 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7046 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7047 hci_le_big_info_adv_report_evt,
7048 sizeof(struct hci_evt_le_big_info_adv_report),
7049 HCI_MAX_EVENT_SIZE),
7050 };
7051
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)7052 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7053 struct sk_buff *skb, u16 *opcode, u8 *status,
7054 hci_req_complete_t *req_complete,
7055 hci_req_complete_skb_t *req_complete_skb)
7056 {
7057 struct hci_ev_le_meta *ev = data;
7058 const struct hci_le_ev *subev;
7059
7060 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7061
7062 /* Only match event if command OGF is for LE */
7063 if (hdev->req_skb &&
7064 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 &&
7065 hci_skb_event(hdev->req_skb) == ev->subevent) {
7066 *opcode = hci_skb_opcode(hdev->req_skb);
7067 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7068 req_complete_skb);
7069 }
7070
7071 subev = &hci_le_ev_table[ev->subevent];
7072 if (!subev->func)
7073 return;
7074
7075 if (skb->len < subev->min_len) {
7076 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7077 ev->subevent, skb->len, subev->min_len);
7078 return;
7079 }
7080
7081 /* Just warn if the length is over max_len size it still be
7082 * possible to partially parse the event so leave to callback to
7083 * decide if that is acceptable.
7084 */
7085 if (skb->len > subev->max_len)
7086 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7087 ev->subevent, skb->len, subev->max_len);
7088 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7089 if (!data)
7090 return;
7091
7092 subev->func(hdev, data, skb);
7093 }
7094
hci_get_cmd_complete(struct hci_dev * hdev,u16 opcode,u8 event,struct sk_buff * skb)7095 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7096 u8 event, struct sk_buff *skb)
7097 {
7098 struct hci_ev_cmd_complete *ev;
7099 struct hci_event_hdr *hdr;
7100
7101 if (!skb)
7102 return false;
7103
7104 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7105 if (!hdr)
7106 return false;
7107
7108 if (event) {
7109 if (hdr->evt != event)
7110 return false;
7111 return true;
7112 }
7113
7114 /* Check if request ended in Command Status - no way to retrieve
7115 * any extra parameters in this case.
7116 */
7117 if (hdr->evt == HCI_EV_CMD_STATUS)
7118 return false;
7119
7120 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7121 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7122 hdr->evt);
7123 return false;
7124 }
7125
7126 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7127 if (!ev)
7128 return false;
7129
7130 if (opcode != __le16_to_cpu(ev->opcode)) {
7131 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7132 __le16_to_cpu(ev->opcode));
7133 return false;
7134 }
7135
7136 return true;
7137 }
7138
hci_store_wake_reason(struct hci_dev * hdev,u8 event,struct sk_buff * skb)7139 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7140 struct sk_buff *skb)
7141 {
7142 struct hci_ev_le_advertising_info *adv;
7143 struct hci_ev_le_direct_adv_info *direct_adv;
7144 struct hci_ev_le_ext_adv_info *ext_adv;
7145 const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7146 const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7147
7148 hci_dev_lock(hdev);
7149
7150 /* If we are currently suspended and this is the first BT event seen,
7151 * save the wake reason associated with the event.
7152 */
7153 if (!hdev->suspended || hdev->wake_reason)
7154 goto unlock;
7155
7156 /* Default to remote wake. Values for wake_reason are documented in the
7157 * Bluez mgmt api docs.
7158 */
7159 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7160
7161 /* Once configured for remote wakeup, we should only wake up for
7162 * reconnections. It's useful to see which device is waking us up so
7163 * keep track of the bdaddr of the connection event that woke us up.
7164 */
7165 if (event == HCI_EV_CONN_REQUEST) {
7166 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7167 hdev->wake_addr_type = BDADDR_BREDR;
7168 } else if (event == HCI_EV_CONN_COMPLETE) {
7169 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7170 hdev->wake_addr_type = BDADDR_BREDR;
7171 } else if (event == HCI_EV_LE_META) {
7172 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7173 u8 subevent = le_ev->subevent;
7174 u8 *ptr = &skb->data[sizeof(*le_ev)];
7175 u8 num_reports = *ptr;
7176
7177 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7178 subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7179 subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7180 num_reports) {
7181 adv = (void *)(ptr + 1);
7182 direct_adv = (void *)(ptr + 1);
7183 ext_adv = (void *)(ptr + 1);
7184
7185 switch (subevent) {
7186 case HCI_EV_LE_ADVERTISING_REPORT:
7187 bacpy(&hdev->wake_addr, &adv->bdaddr);
7188 hdev->wake_addr_type = adv->bdaddr_type;
7189 break;
7190 case HCI_EV_LE_DIRECT_ADV_REPORT:
7191 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7192 hdev->wake_addr_type = direct_adv->bdaddr_type;
7193 break;
7194 case HCI_EV_LE_EXT_ADV_REPORT:
7195 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7196 hdev->wake_addr_type = ext_adv->bdaddr_type;
7197 break;
7198 }
7199 }
7200 } else {
7201 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7202 }
7203
7204 unlock:
7205 hci_dev_unlock(hdev);
7206 }
7207
7208 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7209 [_op] = { \
7210 .req = false, \
7211 .func = _func, \
7212 .min_len = _min_len, \
7213 .max_len = _max_len, \
7214 }
7215
7216 #define HCI_EV(_op, _func, _len) \
7217 HCI_EV_VL(_op, _func, _len, _len)
7218
7219 #define HCI_EV_STATUS(_op, _func) \
7220 HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7221
7222 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7223 [_op] = { \
7224 .req = true, \
7225 .func_req = _func, \
7226 .min_len = _min_len, \
7227 .max_len = _max_len, \
7228 }
7229
7230 #define HCI_EV_REQ(_op, _func, _len) \
7231 HCI_EV_REQ_VL(_op, _func, _len, _len)
7232
7233 /* Entries in this table shall have their position according to the event opcode
7234 * they handle so the use of the macros above is recommend since it does attempt
7235 * to initialize at its proper index using Designated Initializers that way
7236 * events without a callback function don't have entered.
7237 */
7238 static const struct hci_ev {
7239 bool req;
7240 union {
7241 void (*func)(struct hci_dev *hdev, void *data,
7242 struct sk_buff *skb);
7243 void (*func_req)(struct hci_dev *hdev, void *data,
7244 struct sk_buff *skb, u16 *opcode, u8 *status,
7245 hci_req_complete_t *req_complete,
7246 hci_req_complete_skb_t *req_complete_skb);
7247 };
7248 u16 min_len;
7249 u16 max_len;
7250 } hci_ev_table[U8_MAX + 1] = {
7251 /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7252 HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7253 /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7254 HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7255 sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7256 /* [0x03 = HCI_EV_CONN_COMPLETE] */
7257 HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7258 sizeof(struct hci_ev_conn_complete)),
7259 /* [0x04 = HCI_EV_CONN_REQUEST] */
7260 HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7261 sizeof(struct hci_ev_conn_request)),
7262 /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7263 HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7264 sizeof(struct hci_ev_disconn_complete)),
7265 /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7266 HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7267 sizeof(struct hci_ev_auth_complete)),
7268 /* [0x07 = HCI_EV_REMOTE_NAME] */
7269 HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7270 sizeof(struct hci_ev_remote_name)),
7271 /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7272 HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7273 sizeof(struct hci_ev_encrypt_change)),
7274 /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7275 HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7276 hci_change_link_key_complete_evt,
7277 sizeof(struct hci_ev_change_link_key_complete)),
7278 /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7279 HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7280 sizeof(struct hci_ev_remote_features)),
7281 /* [0x0e = HCI_EV_CMD_COMPLETE] */
7282 HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7283 sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7284 /* [0x0f = HCI_EV_CMD_STATUS] */
7285 HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7286 sizeof(struct hci_ev_cmd_status)),
7287 /* [0x10 = HCI_EV_CMD_STATUS] */
7288 HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7289 sizeof(struct hci_ev_hardware_error)),
7290 /* [0x12 = HCI_EV_ROLE_CHANGE] */
7291 HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7292 sizeof(struct hci_ev_role_change)),
7293 /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7294 HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7295 sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7296 /* [0x14 = HCI_EV_MODE_CHANGE] */
7297 HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7298 sizeof(struct hci_ev_mode_change)),
7299 /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7300 HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7301 sizeof(struct hci_ev_pin_code_req)),
7302 /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7303 HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7304 sizeof(struct hci_ev_link_key_req)),
7305 /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7306 HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7307 sizeof(struct hci_ev_link_key_notify)),
7308 /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7309 HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7310 sizeof(struct hci_ev_clock_offset)),
7311 /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7312 HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7313 sizeof(struct hci_ev_pkt_type_change)),
7314 /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7315 HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7316 sizeof(struct hci_ev_pscan_rep_mode)),
7317 /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7318 HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7319 hci_inquiry_result_with_rssi_evt,
7320 sizeof(struct hci_ev_inquiry_result_rssi),
7321 HCI_MAX_EVENT_SIZE),
7322 /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7323 HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7324 sizeof(struct hci_ev_remote_ext_features)),
7325 /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7326 HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7327 sizeof(struct hci_ev_sync_conn_complete)),
7328 /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7329 HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7330 hci_extended_inquiry_result_evt,
7331 sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7332 /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7333 HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7334 sizeof(struct hci_ev_key_refresh_complete)),
7335 /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7336 HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7337 sizeof(struct hci_ev_io_capa_request)),
7338 /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7339 HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7340 sizeof(struct hci_ev_io_capa_reply)),
7341 /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7342 HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7343 sizeof(struct hci_ev_user_confirm_req)),
7344 /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7345 HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7346 sizeof(struct hci_ev_user_passkey_req)),
7347 /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7348 HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7349 sizeof(struct hci_ev_remote_oob_data_request)),
7350 /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7351 HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7352 sizeof(struct hci_ev_simple_pair_complete)),
7353 /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7354 HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7355 sizeof(struct hci_ev_user_passkey_notify)),
7356 /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7357 HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7358 sizeof(struct hci_ev_keypress_notify)),
7359 /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7360 HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7361 sizeof(struct hci_ev_remote_host_features)),
7362 /* [0x3e = HCI_EV_LE_META] */
7363 HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7364 sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7365 /* [0xff = HCI_EV_VENDOR] */
7366 HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7367 };
7368
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)7369 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7370 u16 *opcode, u8 *status,
7371 hci_req_complete_t *req_complete,
7372 hci_req_complete_skb_t *req_complete_skb)
7373 {
7374 const struct hci_ev *ev = &hci_ev_table[event];
7375 void *data;
7376
7377 if (!ev->func)
7378 return;
7379
7380 if (skb->len < ev->min_len) {
7381 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7382 event, skb->len, ev->min_len);
7383 return;
7384 }
7385
7386 /* Just warn if the length is over max_len size it still be
7387 * possible to partially parse the event so leave to callback to
7388 * decide if that is acceptable.
7389 */
7390 if (skb->len > ev->max_len)
7391 bt_dev_warn_ratelimited(hdev,
7392 "unexpected event 0x%2.2x length: %u > %u",
7393 event, skb->len, ev->max_len);
7394
7395 data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7396 if (!data)
7397 return;
7398
7399 if (ev->req)
7400 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7401 req_complete_skb);
7402 else
7403 ev->func(hdev, data, skb);
7404 }
7405
hci_event_packet(struct hci_dev * hdev,struct sk_buff * skb)7406 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7407 {
7408 struct hci_event_hdr *hdr = (void *) skb->data;
7409 hci_req_complete_t req_complete = NULL;
7410 hci_req_complete_skb_t req_complete_skb = NULL;
7411 struct sk_buff *orig_skb = NULL;
7412 u8 status = 0, event, req_evt = 0;
7413 u16 opcode = HCI_OP_NOP;
7414
7415 if (skb->len < sizeof(*hdr)) {
7416 bt_dev_err(hdev, "Malformed HCI Event");
7417 goto done;
7418 }
7419
7420 kfree_skb(hdev->recv_event);
7421 hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7422
7423 event = hdr->evt;
7424 if (!event) {
7425 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7426 event);
7427 goto done;
7428 }
7429
7430 /* Only match event if command OGF is not for LE */
7431 if (hdev->req_skb &&
7432 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) != 0x08 &&
7433 hci_skb_event(hdev->req_skb) == event) {
7434 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->req_skb),
7435 status, &req_complete, &req_complete_skb);
7436 req_evt = event;
7437 }
7438
7439 /* If it looks like we might end up having to call
7440 * req_complete_skb, store a pristine copy of the skb since the
7441 * various handlers may modify the original one through
7442 * skb_pull() calls, etc.
7443 */
7444 if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7445 event == HCI_EV_CMD_COMPLETE)
7446 orig_skb = skb_clone(skb, GFP_KERNEL);
7447
7448 skb_pull(skb, HCI_EVENT_HDR_SIZE);
7449
7450 /* Store wake reason if we're suspended */
7451 hci_store_wake_reason(hdev, event, skb);
7452
7453 bt_dev_dbg(hdev, "event 0x%2.2x", event);
7454
7455 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7456 &req_complete_skb);
7457
7458 if (req_complete) {
7459 req_complete(hdev, status, opcode);
7460 } else if (req_complete_skb) {
7461 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7462 kfree_skb(orig_skb);
7463 orig_skb = NULL;
7464 }
7465 req_complete_skb(hdev, status, opcode, orig_skb);
7466 }
7467
7468 done:
7469 kfree_skb(orig_skb);
7470 kfree_skb(skb);
7471 hdev->stat.evt_rx++;
7472 }
7473