1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
4 Copyright 2023 NXP
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24 */
25
26 /* Bluetooth HCI event handling. */
27
28 #include <asm/unaligned.h>
29 #include <linux/crypto.h>
30 #include <crypto/algapi.h>
31
32 #include <net/bluetooth/bluetooth.h>
33 #include <net/bluetooth/hci_core.h>
34 #include <net/bluetooth/mgmt.h>
35
36 #include "hci_request.h"
37 #include "hci_debugfs.h"
38 #include "hci_codec.h"
39 #include "smp.h"
40 #include "msft.h"
41 #include "eir.h"
42
43 #define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
44 "\x00\x00\x00\x00\x00\x00\x00\x00"
45
46 #define secs_to_jiffies(_secs) msecs_to_jiffies((_secs) * 1000)
47
48 /* Handle HCI Event packets */
49
hci_ev_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u8 ev,size_t len)50 static void *hci_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
51 u8 ev, size_t len)
52 {
53 void *data;
54
55 data = skb_pull_data(skb, len);
56 if (!data)
57 bt_dev_err(hdev, "Malformed Event: 0x%2.2x", ev);
58
59 return data;
60 }
61
hci_cc_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u16 op,size_t len)62 static void *hci_cc_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
63 u16 op, size_t len)
64 {
65 void *data;
66
67 data = skb_pull_data(skb, len);
68 if (!data)
69 bt_dev_err(hdev, "Malformed Command Complete: 0x%4.4x", op);
70
71 return data;
72 }
73
hci_le_ev_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u8 ev,size_t len)74 static void *hci_le_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
75 u8 ev, size_t len)
76 {
77 void *data;
78
79 data = skb_pull_data(skb, len);
80 if (!data)
81 bt_dev_err(hdev, "Malformed LE Event: 0x%2.2x", ev);
82
83 return data;
84 }
85
hci_cc_inquiry_cancel(struct hci_dev * hdev,void * data,struct sk_buff * skb)86 static u8 hci_cc_inquiry_cancel(struct hci_dev *hdev, void *data,
87 struct sk_buff *skb)
88 {
89 struct hci_ev_status *rp = data;
90
91 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
92
93 /* It is possible that we receive Inquiry Complete event right
94 * before we receive Inquiry Cancel Command Complete event, in
95 * which case the latter event should have status of Command
96 * Disallowed. This should not be treated as error, since
97 * we actually achieve what Inquiry Cancel wants to achieve,
98 * which is to end the last Inquiry session.
99 */
100 if (rp->status == HCI_ERROR_COMMAND_DISALLOWED && !test_bit(HCI_INQUIRY, &hdev->flags)) {
101 bt_dev_warn(hdev, "Ignoring error of Inquiry Cancel command");
102 rp->status = 0x00;
103 }
104
105 if (rp->status)
106 return rp->status;
107
108 clear_bit(HCI_INQUIRY, &hdev->flags);
109 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
110 wake_up_bit(&hdev->flags, HCI_INQUIRY);
111
112 hci_dev_lock(hdev);
113 /* Set discovery state to stopped if we're not doing LE active
114 * scanning.
115 */
116 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
117 hdev->le_scan_type != LE_SCAN_ACTIVE)
118 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
119 hci_dev_unlock(hdev);
120
121 return rp->status;
122 }
123
hci_cc_periodic_inq(struct hci_dev * hdev,void * data,struct sk_buff * skb)124 static u8 hci_cc_periodic_inq(struct hci_dev *hdev, void *data,
125 struct sk_buff *skb)
126 {
127 struct hci_ev_status *rp = data;
128
129 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
130
131 if (rp->status)
132 return rp->status;
133
134 hci_dev_set_flag(hdev, HCI_PERIODIC_INQ);
135
136 return rp->status;
137 }
138
hci_cc_exit_periodic_inq(struct hci_dev * hdev,void * data,struct sk_buff * skb)139 static u8 hci_cc_exit_periodic_inq(struct hci_dev *hdev, void *data,
140 struct sk_buff *skb)
141 {
142 struct hci_ev_status *rp = data;
143
144 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
145
146 if (rp->status)
147 return rp->status;
148
149 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);
150
151 return rp->status;
152 }
153
hci_cc_remote_name_req_cancel(struct hci_dev * hdev,void * data,struct sk_buff * skb)154 static u8 hci_cc_remote_name_req_cancel(struct hci_dev *hdev, void *data,
155 struct sk_buff *skb)
156 {
157 struct hci_ev_status *rp = data;
158
159 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
160
161 return rp->status;
162 }
163
hci_cc_role_discovery(struct hci_dev * hdev,void * data,struct sk_buff * skb)164 static u8 hci_cc_role_discovery(struct hci_dev *hdev, void *data,
165 struct sk_buff *skb)
166 {
167 struct hci_rp_role_discovery *rp = data;
168 struct hci_conn *conn;
169
170 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
171
172 if (rp->status)
173 return rp->status;
174
175 hci_dev_lock(hdev);
176
177 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
178 if (conn)
179 conn->role = rp->role;
180
181 hci_dev_unlock(hdev);
182
183 return rp->status;
184 }
185
hci_cc_read_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)186 static u8 hci_cc_read_link_policy(struct hci_dev *hdev, void *data,
187 struct sk_buff *skb)
188 {
189 struct hci_rp_read_link_policy *rp = data;
190 struct hci_conn *conn;
191
192 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
193
194 if (rp->status)
195 return rp->status;
196
197 hci_dev_lock(hdev);
198
199 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
200 if (conn)
201 conn->link_policy = __le16_to_cpu(rp->policy);
202
203 hci_dev_unlock(hdev);
204
205 return rp->status;
206 }
207
hci_cc_write_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)208 static u8 hci_cc_write_link_policy(struct hci_dev *hdev, void *data,
209 struct sk_buff *skb)
210 {
211 struct hci_rp_write_link_policy *rp = data;
212 struct hci_conn *conn;
213 void *sent;
214
215 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
216
217 if (rp->status)
218 return rp->status;
219
220 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY);
221 if (!sent)
222 return rp->status;
223
224 hci_dev_lock(hdev);
225
226 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
227 if (conn)
228 conn->link_policy = get_unaligned_le16(sent + 2);
229
230 hci_dev_unlock(hdev);
231
232 return rp->status;
233 }
234
hci_cc_read_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)235 static u8 hci_cc_read_def_link_policy(struct hci_dev *hdev, void *data,
236 struct sk_buff *skb)
237 {
238 struct hci_rp_read_def_link_policy *rp = data;
239
240 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
241
242 if (rp->status)
243 return rp->status;
244
245 hdev->link_policy = __le16_to_cpu(rp->policy);
246
247 return rp->status;
248 }
249
hci_cc_write_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)250 static u8 hci_cc_write_def_link_policy(struct hci_dev *hdev, void *data,
251 struct sk_buff *skb)
252 {
253 struct hci_ev_status *rp = data;
254 void *sent;
255
256 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
257
258 if (rp->status)
259 return rp->status;
260
261 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY);
262 if (!sent)
263 return rp->status;
264
265 hdev->link_policy = get_unaligned_le16(sent);
266
267 return rp->status;
268 }
269
hci_cc_reset(struct hci_dev * hdev,void * data,struct sk_buff * skb)270 static u8 hci_cc_reset(struct hci_dev *hdev, void *data, struct sk_buff *skb)
271 {
272 struct hci_ev_status *rp = data;
273
274 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
275
276 clear_bit(HCI_RESET, &hdev->flags);
277
278 if (rp->status)
279 return rp->status;
280
281 /* Reset all non-persistent flags */
282 hci_dev_clear_volatile_flags(hdev);
283
284 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
285
286 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
287 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
288
289 memset(hdev->adv_data, 0, sizeof(hdev->adv_data));
290 hdev->adv_data_len = 0;
291
292 memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data));
293 hdev->scan_rsp_data_len = 0;
294
295 hdev->le_scan_type = LE_SCAN_PASSIVE;
296
297 hdev->ssp_debug_mode = 0;
298
299 hci_bdaddr_list_clear(&hdev->le_accept_list);
300 hci_bdaddr_list_clear(&hdev->le_resolv_list);
301
302 return rp->status;
303 }
304
hci_cc_read_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)305 static u8 hci_cc_read_stored_link_key(struct hci_dev *hdev, void *data,
306 struct sk_buff *skb)
307 {
308 struct hci_rp_read_stored_link_key *rp = data;
309 struct hci_cp_read_stored_link_key *sent;
310
311 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
312
313 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY);
314 if (!sent)
315 return rp->status;
316
317 if (!rp->status && sent->read_all == 0x01) {
318 hdev->stored_max_keys = le16_to_cpu(rp->max_keys);
319 hdev->stored_num_keys = le16_to_cpu(rp->num_keys);
320 }
321
322 return rp->status;
323 }
324
hci_cc_delete_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)325 static u8 hci_cc_delete_stored_link_key(struct hci_dev *hdev, void *data,
326 struct sk_buff *skb)
327 {
328 struct hci_rp_delete_stored_link_key *rp = data;
329 u16 num_keys;
330
331 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
332
333 if (rp->status)
334 return rp->status;
335
336 num_keys = le16_to_cpu(rp->num_keys);
337
338 if (num_keys <= hdev->stored_num_keys)
339 hdev->stored_num_keys -= num_keys;
340 else
341 hdev->stored_num_keys = 0;
342
343 return rp->status;
344 }
345
hci_cc_write_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)346 static u8 hci_cc_write_local_name(struct hci_dev *hdev, void *data,
347 struct sk_buff *skb)
348 {
349 struct hci_ev_status *rp = data;
350 void *sent;
351
352 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
353
354 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME);
355 if (!sent)
356 return rp->status;
357
358 hci_dev_lock(hdev);
359
360 if (hci_dev_test_flag(hdev, HCI_MGMT))
361 mgmt_set_local_name_complete(hdev, sent, rp->status);
362 else if (!rp->status)
363 memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH);
364
365 hci_dev_unlock(hdev);
366
367 return rp->status;
368 }
369
hci_cc_read_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)370 static u8 hci_cc_read_local_name(struct hci_dev *hdev, void *data,
371 struct sk_buff *skb)
372 {
373 struct hci_rp_read_local_name *rp = data;
374
375 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
376
377 if (rp->status)
378 return rp->status;
379
380 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
381 hci_dev_test_flag(hdev, HCI_CONFIG))
382 memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH);
383
384 return rp->status;
385 }
386
hci_cc_write_auth_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)387 static u8 hci_cc_write_auth_enable(struct hci_dev *hdev, void *data,
388 struct sk_buff *skb)
389 {
390 struct hci_ev_status *rp = data;
391 void *sent;
392
393 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
394
395 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE);
396 if (!sent)
397 return rp->status;
398
399 hci_dev_lock(hdev);
400
401 if (!rp->status) {
402 __u8 param = *((__u8 *) sent);
403
404 if (param == AUTH_ENABLED)
405 set_bit(HCI_AUTH, &hdev->flags);
406 else
407 clear_bit(HCI_AUTH, &hdev->flags);
408 }
409
410 if (hci_dev_test_flag(hdev, HCI_MGMT))
411 mgmt_auth_enable_complete(hdev, rp->status);
412
413 hci_dev_unlock(hdev);
414
415 return rp->status;
416 }
417
hci_cc_write_encrypt_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)418 static u8 hci_cc_write_encrypt_mode(struct hci_dev *hdev, void *data,
419 struct sk_buff *skb)
420 {
421 struct hci_ev_status *rp = data;
422 __u8 param;
423 void *sent;
424
425 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
426
427 if (rp->status)
428 return rp->status;
429
430 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE);
431 if (!sent)
432 return rp->status;
433
434 param = *((__u8 *) sent);
435
436 if (param)
437 set_bit(HCI_ENCRYPT, &hdev->flags);
438 else
439 clear_bit(HCI_ENCRYPT, &hdev->flags);
440
441 return rp->status;
442 }
443
hci_cc_write_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)444 static u8 hci_cc_write_scan_enable(struct hci_dev *hdev, void *data,
445 struct sk_buff *skb)
446 {
447 struct hci_ev_status *rp = data;
448 __u8 param;
449 void *sent;
450
451 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
452
453 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE);
454 if (!sent)
455 return rp->status;
456
457 param = *((__u8 *) sent);
458
459 hci_dev_lock(hdev);
460
461 if (rp->status) {
462 hdev->discov_timeout = 0;
463 goto done;
464 }
465
466 if (param & SCAN_INQUIRY)
467 set_bit(HCI_ISCAN, &hdev->flags);
468 else
469 clear_bit(HCI_ISCAN, &hdev->flags);
470
471 if (param & SCAN_PAGE)
472 set_bit(HCI_PSCAN, &hdev->flags);
473 else
474 clear_bit(HCI_PSCAN, &hdev->flags);
475
476 done:
477 hci_dev_unlock(hdev);
478
479 return rp->status;
480 }
481
hci_cc_set_event_filter(struct hci_dev * hdev,void * data,struct sk_buff * skb)482 static u8 hci_cc_set_event_filter(struct hci_dev *hdev, void *data,
483 struct sk_buff *skb)
484 {
485 struct hci_ev_status *rp = data;
486 struct hci_cp_set_event_filter *cp;
487 void *sent;
488
489 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
490
491 if (rp->status)
492 return rp->status;
493
494 sent = hci_sent_cmd_data(hdev, HCI_OP_SET_EVENT_FLT);
495 if (!sent)
496 return rp->status;
497
498 cp = (struct hci_cp_set_event_filter *)sent;
499
500 if (cp->flt_type == HCI_FLT_CLEAR_ALL)
501 hci_dev_clear_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
502 else
503 hci_dev_set_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
504
505 return rp->status;
506 }
507
hci_cc_read_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)508 static u8 hci_cc_read_class_of_dev(struct hci_dev *hdev, void *data,
509 struct sk_buff *skb)
510 {
511 struct hci_rp_read_class_of_dev *rp = data;
512
513 if (WARN_ON(!hdev))
514 return HCI_ERROR_UNSPECIFIED;
515
516 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
517
518 if (rp->status)
519 return rp->status;
520
521 memcpy(hdev->dev_class, rp->dev_class, 3);
522
523 bt_dev_dbg(hdev, "class 0x%.2x%.2x%.2x", hdev->dev_class[2],
524 hdev->dev_class[1], hdev->dev_class[0]);
525
526 return rp->status;
527 }
528
hci_cc_write_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)529 static u8 hci_cc_write_class_of_dev(struct hci_dev *hdev, void *data,
530 struct sk_buff *skb)
531 {
532 struct hci_ev_status *rp = data;
533 void *sent;
534
535 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
536
537 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV);
538 if (!sent)
539 return rp->status;
540
541 hci_dev_lock(hdev);
542
543 if (!rp->status)
544 memcpy(hdev->dev_class, sent, 3);
545
546 if (hci_dev_test_flag(hdev, HCI_MGMT))
547 mgmt_set_class_of_dev_complete(hdev, sent, rp->status);
548
549 hci_dev_unlock(hdev);
550
551 return rp->status;
552 }
553
hci_cc_read_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)554 static u8 hci_cc_read_voice_setting(struct hci_dev *hdev, void *data,
555 struct sk_buff *skb)
556 {
557 struct hci_rp_read_voice_setting *rp = data;
558 __u16 setting;
559
560 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
561
562 if (rp->status)
563 return rp->status;
564
565 setting = __le16_to_cpu(rp->voice_setting);
566
567 if (hdev->voice_setting == setting)
568 return rp->status;
569
570 hdev->voice_setting = setting;
571
572 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
573
574 if (hdev->notify)
575 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
576
577 return rp->status;
578 }
579
hci_cc_write_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)580 static u8 hci_cc_write_voice_setting(struct hci_dev *hdev, void *data,
581 struct sk_buff *skb)
582 {
583 struct hci_ev_status *rp = data;
584 __u16 setting;
585 void *sent;
586
587 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
588
589 if (rp->status)
590 return rp->status;
591
592 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING);
593 if (!sent)
594 return rp->status;
595
596 setting = get_unaligned_le16(sent);
597
598 if (hdev->voice_setting == setting)
599 return rp->status;
600
601 hdev->voice_setting = setting;
602
603 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
604
605 if (hdev->notify)
606 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
607
608 return rp->status;
609 }
610
hci_cc_read_num_supported_iac(struct hci_dev * hdev,void * data,struct sk_buff * skb)611 static u8 hci_cc_read_num_supported_iac(struct hci_dev *hdev, void *data,
612 struct sk_buff *skb)
613 {
614 struct hci_rp_read_num_supported_iac *rp = data;
615
616 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
617
618 if (rp->status)
619 return rp->status;
620
621 hdev->num_iac = rp->num_iac;
622
623 bt_dev_dbg(hdev, "num iac %d", hdev->num_iac);
624
625 return rp->status;
626 }
627
hci_cc_write_ssp_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)628 static u8 hci_cc_write_ssp_mode(struct hci_dev *hdev, void *data,
629 struct sk_buff *skb)
630 {
631 struct hci_ev_status *rp = data;
632 struct hci_cp_write_ssp_mode *sent;
633
634 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
635
636 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE);
637 if (!sent)
638 return rp->status;
639
640 hci_dev_lock(hdev);
641
642 if (!rp->status) {
643 if (sent->mode)
644 hdev->features[1][0] |= LMP_HOST_SSP;
645 else
646 hdev->features[1][0] &= ~LMP_HOST_SSP;
647 }
648
649 if (!rp->status) {
650 if (sent->mode)
651 hci_dev_set_flag(hdev, HCI_SSP_ENABLED);
652 else
653 hci_dev_clear_flag(hdev, HCI_SSP_ENABLED);
654 }
655
656 hci_dev_unlock(hdev);
657
658 return rp->status;
659 }
660
hci_cc_write_sc_support(struct hci_dev * hdev,void * data,struct sk_buff * skb)661 static u8 hci_cc_write_sc_support(struct hci_dev *hdev, void *data,
662 struct sk_buff *skb)
663 {
664 struct hci_ev_status *rp = data;
665 struct hci_cp_write_sc_support *sent;
666
667 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
668
669 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT);
670 if (!sent)
671 return rp->status;
672
673 hci_dev_lock(hdev);
674
675 if (!rp->status) {
676 if (sent->support)
677 hdev->features[1][0] |= LMP_HOST_SC;
678 else
679 hdev->features[1][0] &= ~LMP_HOST_SC;
680 }
681
682 if (!hci_dev_test_flag(hdev, HCI_MGMT) && !rp->status) {
683 if (sent->support)
684 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
685 else
686 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
687 }
688
689 hci_dev_unlock(hdev);
690
691 return rp->status;
692 }
693
hci_cc_read_local_version(struct hci_dev * hdev,void * data,struct sk_buff * skb)694 static u8 hci_cc_read_local_version(struct hci_dev *hdev, void *data,
695 struct sk_buff *skb)
696 {
697 struct hci_rp_read_local_version *rp = data;
698
699 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
700
701 if (rp->status)
702 return rp->status;
703
704 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
705 hci_dev_test_flag(hdev, HCI_CONFIG)) {
706 hdev->hci_ver = rp->hci_ver;
707 hdev->hci_rev = __le16_to_cpu(rp->hci_rev);
708 hdev->lmp_ver = rp->lmp_ver;
709 hdev->manufacturer = __le16_to_cpu(rp->manufacturer);
710 hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver);
711 }
712
713 return rp->status;
714 }
715
hci_cc_read_enc_key_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)716 static u8 hci_cc_read_enc_key_size(struct hci_dev *hdev, void *data,
717 struct sk_buff *skb)
718 {
719 struct hci_rp_read_enc_key_size *rp = data;
720 struct hci_conn *conn;
721 u16 handle;
722 u8 status = rp->status;
723
724 bt_dev_dbg(hdev, "status 0x%2.2x", status);
725
726 handle = le16_to_cpu(rp->handle);
727
728 hci_dev_lock(hdev);
729
730 conn = hci_conn_hash_lookup_handle(hdev, handle);
731 if (!conn) {
732 status = 0xFF;
733 goto done;
734 }
735
736 /* While unexpected, the read_enc_key_size command may fail. The most
737 * secure approach is to then assume the key size is 0 to force a
738 * disconnection.
739 */
740 if (status) {
741 bt_dev_err(hdev, "failed to read key size for handle %u",
742 handle);
743 conn->enc_key_size = 0;
744 } else {
745 conn->enc_key_size = rp->key_size;
746 status = 0;
747
748 if (conn->enc_key_size < hdev->min_enc_key_size) {
749 /* As slave role, the conn->state has been set to
750 * BT_CONNECTED and l2cap conn req might not be received
751 * yet, at this moment the l2cap layer almost does
752 * nothing with the non-zero status.
753 * So we also clear encrypt related bits, and then the
754 * handler of l2cap conn req will get the right secure
755 * state at a later time.
756 */
757 status = HCI_ERROR_AUTH_FAILURE;
758 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
759 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
760 }
761 }
762
763 hci_encrypt_cfm(conn, status);
764
765 done:
766 hci_dev_unlock(hdev);
767
768 return status;
769 }
770
hci_cc_read_local_commands(struct hci_dev * hdev,void * data,struct sk_buff * skb)771 static u8 hci_cc_read_local_commands(struct hci_dev *hdev, void *data,
772 struct sk_buff *skb)
773 {
774 struct hci_rp_read_local_commands *rp = data;
775
776 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
777
778 if (rp->status)
779 return rp->status;
780
781 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
782 hci_dev_test_flag(hdev, HCI_CONFIG))
783 memcpy(hdev->commands, rp->commands, sizeof(hdev->commands));
784
785 return rp->status;
786 }
787
hci_cc_read_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)788 static u8 hci_cc_read_auth_payload_timeout(struct hci_dev *hdev, void *data,
789 struct sk_buff *skb)
790 {
791 struct hci_rp_read_auth_payload_to *rp = data;
792 struct hci_conn *conn;
793
794 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
795
796 if (rp->status)
797 return rp->status;
798
799 hci_dev_lock(hdev);
800
801 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
802 if (conn)
803 conn->auth_payload_timeout = __le16_to_cpu(rp->timeout);
804
805 hci_dev_unlock(hdev);
806
807 return rp->status;
808 }
809
hci_cc_write_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)810 static u8 hci_cc_write_auth_payload_timeout(struct hci_dev *hdev, void *data,
811 struct sk_buff *skb)
812 {
813 struct hci_rp_write_auth_payload_to *rp = data;
814 struct hci_conn *conn;
815 void *sent;
816
817 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
818
819 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO);
820 if (!sent)
821 return rp->status;
822
823 hci_dev_lock(hdev);
824
825 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
826 if (!conn) {
827 rp->status = 0xff;
828 goto unlock;
829 }
830
831 if (!rp->status)
832 conn->auth_payload_timeout = get_unaligned_le16(sent + 2);
833
834 unlock:
835 hci_dev_unlock(hdev);
836
837 return rp->status;
838 }
839
hci_cc_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)840 static u8 hci_cc_read_local_features(struct hci_dev *hdev, void *data,
841 struct sk_buff *skb)
842 {
843 struct hci_rp_read_local_features *rp = data;
844
845 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
846
847 if (rp->status)
848 return rp->status;
849
850 memcpy(hdev->features, rp->features, 8);
851
852 /* Adjust default settings according to features
853 * supported by device. */
854
855 if (hdev->features[0][0] & LMP_3SLOT)
856 hdev->pkt_type |= (HCI_DM3 | HCI_DH3);
857
858 if (hdev->features[0][0] & LMP_5SLOT)
859 hdev->pkt_type |= (HCI_DM5 | HCI_DH5);
860
861 if (hdev->features[0][1] & LMP_HV2) {
862 hdev->pkt_type |= (HCI_HV2);
863 hdev->esco_type |= (ESCO_HV2);
864 }
865
866 if (hdev->features[0][1] & LMP_HV3) {
867 hdev->pkt_type |= (HCI_HV3);
868 hdev->esco_type |= (ESCO_HV3);
869 }
870
871 if (lmp_esco_capable(hdev))
872 hdev->esco_type |= (ESCO_EV3);
873
874 if (hdev->features[0][4] & LMP_EV4)
875 hdev->esco_type |= (ESCO_EV4);
876
877 if (hdev->features[0][4] & LMP_EV5)
878 hdev->esco_type |= (ESCO_EV5);
879
880 if (hdev->features[0][5] & LMP_EDR_ESCO_2M)
881 hdev->esco_type |= (ESCO_2EV3);
882
883 if (hdev->features[0][5] & LMP_EDR_ESCO_3M)
884 hdev->esco_type |= (ESCO_3EV3);
885
886 if (hdev->features[0][5] & LMP_EDR_3S_ESCO)
887 hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5);
888
889 return rp->status;
890 }
891
hci_cc_read_local_ext_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)892 static u8 hci_cc_read_local_ext_features(struct hci_dev *hdev, void *data,
893 struct sk_buff *skb)
894 {
895 struct hci_rp_read_local_ext_features *rp = data;
896
897 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
898
899 if (rp->status)
900 return rp->status;
901
902 if (hdev->max_page < rp->max_page) {
903 if (test_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2,
904 &hdev->quirks))
905 bt_dev_warn(hdev, "broken local ext features page 2");
906 else
907 hdev->max_page = rp->max_page;
908 }
909
910 if (rp->page < HCI_MAX_PAGES)
911 memcpy(hdev->features[rp->page], rp->features, 8);
912
913 return rp->status;
914 }
915
hci_cc_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)916 static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data,
917 struct sk_buff *skb)
918 {
919 struct hci_rp_read_buffer_size *rp = data;
920
921 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
922
923 if (rp->status)
924 return rp->status;
925
926 hdev->acl_mtu = __le16_to_cpu(rp->acl_mtu);
927 hdev->sco_mtu = rp->sco_mtu;
928 hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt);
929 hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt);
930
931 if (test_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks)) {
932 hdev->sco_mtu = 64;
933 hdev->sco_pkts = 8;
934 }
935
936 hdev->acl_cnt = hdev->acl_pkts;
937 hdev->sco_cnt = hdev->sco_pkts;
938
939 BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu,
940 hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts);
941
942 if (!hdev->acl_mtu || !hdev->acl_pkts)
943 return HCI_ERROR_INVALID_PARAMETERS;
944
945 return rp->status;
946 }
947
hci_cc_read_bd_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)948 static u8 hci_cc_read_bd_addr(struct hci_dev *hdev, void *data,
949 struct sk_buff *skb)
950 {
951 struct hci_rp_read_bd_addr *rp = data;
952
953 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
954
955 if (rp->status)
956 return rp->status;
957
958 if (test_bit(HCI_INIT, &hdev->flags))
959 bacpy(&hdev->bdaddr, &rp->bdaddr);
960
961 if (hci_dev_test_flag(hdev, HCI_SETUP))
962 bacpy(&hdev->setup_addr, &rp->bdaddr);
963
964 return rp->status;
965 }
966
hci_cc_read_local_pairing_opts(struct hci_dev * hdev,void * data,struct sk_buff * skb)967 static u8 hci_cc_read_local_pairing_opts(struct hci_dev *hdev, void *data,
968 struct sk_buff *skb)
969 {
970 struct hci_rp_read_local_pairing_opts *rp = data;
971
972 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
973
974 if (rp->status)
975 return rp->status;
976
977 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
978 hci_dev_test_flag(hdev, HCI_CONFIG)) {
979 hdev->pairing_opts = rp->pairing_opts;
980 hdev->max_enc_key_size = rp->max_key_size;
981 }
982
983 return rp->status;
984 }
985
hci_cc_read_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)986 static u8 hci_cc_read_page_scan_activity(struct hci_dev *hdev, void *data,
987 struct sk_buff *skb)
988 {
989 struct hci_rp_read_page_scan_activity *rp = data;
990
991 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
992
993 if (rp->status)
994 return rp->status;
995
996 if (test_bit(HCI_INIT, &hdev->flags)) {
997 hdev->page_scan_interval = __le16_to_cpu(rp->interval);
998 hdev->page_scan_window = __le16_to_cpu(rp->window);
999 }
1000
1001 return rp->status;
1002 }
1003
hci_cc_write_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)1004 static u8 hci_cc_write_page_scan_activity(struct hci_dev *hdev, void *data,
1005 struct sk_buff *skb)
1006 {
1007 struct hci_ev_status *rp = data;
1008 struct hci_cp_write_page_scan_activity *sent;
1009
1010 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1011
1012 if (rp->status)
1013 return rp->status;
1014
1015 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY);
1016 if (!sent)
1017 return rp->status;
1018
1019 hdev->page_scan_interval = __le16_to_cpu(sent->interval);
1020 hdev->page_scan_window = __le16_to_cpu(sent->window);
1021
1022 return rp->status;
1023 }
1024
hci_cc_read_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1025 static u8 hci_cc_read_page_scan_type(struct hci_dev *hdev, void *data,
1026 struct sk_buff *skb)
1027 {
1028 struct hci_rp_read_page_scan_type *rp = data;
1029
1030 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1031
1032 if (rp->status)
1033 return rp->status;
1034
1035 if (test_bit(HCI_INIT, &hdev->flags))
1036 hdev->page_scan_type = rp->type;
1037
1038 return rp->status;
1039 }
1040
hci_cc_write_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1041 static u8 hci_cc_write_page_scan_type(struct hci_dev *hdev, void *data,
1042 struct sk_buff *skb)
1043 {
1044 struct hci_ev_status *rp = data;
1045 u8 *type;
1046
1047 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1048
1049 if (rp->status)
1050 return rp->status;
1051
1052 type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE);
1053 if (type)
1054 hdev->page_scan_type = *type;
1055
1056 return rp->status;
1057 }
1058
hci_cc_read_clock(struct hci_dev * hdev,void * data,struct sk_buff * skb)1059 static u8 hci_cc_read_clock(struct hci_dev *hdev, void *data,
1060 struct sk_buff *skb)
1061 {
1062 struct hci_rp_read_clock *rp = data;
1063 struct hci_cp_read_clock *cp;
1064 struct hci_conn *conn;
1065
1066 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1067
1068 if (rp->status)
1069 return rp->status;
1070
1071 hci_dev_lock(hdev);
1072
1073 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
1074 if (!cp)
1075 goto unlock;
1076
1077 if (cp->which == 0x00) {
1078 hdev->clock = le32_to_cpu(rp->clock);
1079 goto unlock;
1080 }
1081
1082 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
1083 if (conn) {
1084 conn->clock = le32_to_cpu(rp->clock);
1085 conn->clock_accuracy = le16_to_cpu(rp->accuracy);
1086 }
1087
1088 unlock:
1089 hci_dev_unlock(hdev);
1090 return rp->status;
1091 }
1092
hci_cc_read_inq_rsp_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1093 static u8 hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev, void *data,
1094 struct sk_buff *skb)
1095 {
1096 struct hci_rp_read_inq_rsp_tx_power *rp = data;
1097
1098 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1099
1100 if (rp->status)
1101 return rp->status;
1102
1103 hdev->inq_tx_power = rp->tx_power;
1104
1105 return rp->status;
1106 }
1107
hci_cc_read_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1108 static u8 hci_cc_read_def_err_data_reporting(struct hci_dev *hdev, void *data,
1109 struct sk_buff *skb)
1110 {
1111 struct hci_rp_read_def_err_data_reporting *rp = data;
1112
1113 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1114
1115 if (rp->status)
1116 return rp->status;
1117
1118 hdev->err_data_reporting = rp->err_data_reporting;
1119
1120 return rp->status;
1121 }
1122
hci_cc_write_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1123 static u8 hci_cc_write_def_err_data_reporting(struct hci_dev *hdev, void *data,
1124 struct sk_buff *skb)
1125 {
1126 struct hci_ev_status *rp = data;
1127 struct hci_cp_write_def_err_data_reporting *cp;
1128
1129 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1130
1131 if (rp->status)
1132 return rp->status;
1133
1134 cp = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING);
1135 if (!cp)
1136 return rp->status;
1137
1138 hdev->err_data_reporting = cp->err_data_reporting;
1139
1140 return rp->status;
1141 }
1142
hci_cc_pin_code_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1143 static u8 hci_cc_pin_code_reply(struct hci_dev *hdev, void *data,
1144 struct sk_buff *skb)
1145 {
1146 struct hci_rp_pin_code_reply *rp = data;
1147 struct hci_cp_pin_code_reply *cp;
1148 struct hci_conn *conn;
1149
1150 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1151
1152 hci_dev_lock(hdev);
1153
1154 if (hci_dev_test_flag(hdev, HCI_MGMT))
1155 mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status);
1156
1157 if (rp->status)
1158 goto unlock;
1159
1160 cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY);
1161 if (!cp)
1162 goto unlock;
1163
1164 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
1165 if (conn)
1166 conn->pin_length = cp->pin_len;
1167
1168 unlock:
1169 hci_dev_unlock(hdev);
1170 return rp->status;
1171 }
1172
hci_cc_pin_code_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1173 static u8 hci_cc_pin_code_neg_reply(struct hci_dev *hdev, void *data,
1174 struct sk_buff *skb)
1175 {
1176 struct hci_rp_pin_code_neg_reply *rp = data;
1177
1178 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1179
1180 hci_dev_lock(hdev);
1181
1182 if (hci_dev_test_flag(hdev, HCI_MGMT))
1183 mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr,
1184 rp->status);
1185
1186 hci_dev_unlock(hdev);
1187
1188 return rp->status;
1189 }
1190
hci_cc_le_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1191 static u8 hci_cc_le_read_buffer_size(struct hci_dev *hdev, void *data,
1192 struct sk_buff *skb)
1193 {
1194 struct hci_rp_le_read_buffer_size *rp = data;
1195
1196 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1197
1198 if (rp->status)
1199 return rp->status;
1200
1201 hdev->le_mtu = __le16_to_cpu(rp->le_mtu);
1202 hdev->le_pkts = rp->le_max_pkt;
1203
1204 hdev->le_cnt = hdev->le_pkts;
1205
1206 BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts);
1207
1208 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
1209 return HCI_ERROR_INVALID_PARAMETERS;
1210
1211 return rp->status;
1212 }
1213
hci_cc_le_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)1214 static u8 hci_cc_le_read_local_features(struct hci_dev *hdev, void *data,
1215 struct sk_buff *skb)
1216 {
1217 struct hci_rp_le_read_local_features *rp = data;
1218
1219 BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1220
1221 if (rp->status)
1222 return rp->status;
1223
1224 memcpy(hdev->le_features, rp->features, 8);
1225
1226 return rp->status;
1227 }
1228
hci_cc_le_read_adv_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1229 static u8 hci_cc_le_read_adv_tx_power(struct hci_dev *hdev, void *data,
1230 struct sk_buff *skb)
1231 {
1232 struct hci_rp_le_read_adv_tx_power *rp = data;
1233
1234 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1235
1236 if (rp->status)
1237 return rp->status;
1238
1239 hdev->adv_tx_power = rp->tx_power;
1240
1241 return rp->status;
1242 }
1243
hci_cc_user_confirm_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1244 static u8 hci_cc_user_confirm_reply(struct hci_dev *hdev, void *data,
1245 struct sk_buff *skb)
1246 {
1247 struct hci_rp_user_confirm_reply *rp = data;
1248
1249 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1250
1251 hci_dev_lock(hdev);
1252
1253 if (hci_dev_test_flag(hdev, HCI_MGMT))
1254 mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0,
1255 rp->status);
1256
1257 hci_dev_unlock(hdev);
1258
1259 return rp->status;
1260 }
1261
hci_cc_user_confirm_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1262 static u8 hci_cc_user_confirm_neg_reply(struct hci_dev *hdev, void *data,
1263 struct sk_buff *skb)
1264 {
1265 struct hci_rp_user_confirm_reply *rp = data;
1266
1267 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1268
1269 hci_dev_lock(hdev);
1270
1271 if (hci_dev_test_flag(hdev, HCI_MGMT))
1272 mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr,
1273 ACL_LINK, 0, rp->status);
1274
1275 hci_dev_unlock(hdev);
1276
1277 return rp->status;
1278 }
1279
hci_cc_user_passkey_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1280 static u8 hci_cc_user_passkey_reply(struct hci_dev *hdev, void *data,
1281 struct sk_buff *skb)
1282 {
1283 struct hci_rp_user_confirm_reply *rp = data;
1284
1285 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1286
1287 hci_dev_lock(hdev);
1288
1289 if (hci_dev_test_flag(hdev, HCI_MGMT))
1290 mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK,
1291 0, rp->status);
1292
1293 hci_dev_unlock(hdev);
1294
1295 return rp->status;
1296 }
1297
hci_cc_user_passkey_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1298 static u8 hci_cc_user_passkey_neg_reply(struct hci_dev *hdev, void *data,
1299 struct sk_buff *skb)
1300 {
1301 struct hci_rp_user_confirm_reply *rp = data;
1302
1303 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1304
1305 hci_dev_lock(hdev);
1306
1307 if (hci_dev_test_flag(hdev, HCI_MGMT))
1308 mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr,
1309 ACL_LINK, 0, rp->status);
1310
1311 hci_dev_unlock(hdev);
1312
1313 return rp->status;
1314 }
1315
hci_cc_read_local_oob_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1316 static u8 hci_cc_read_local_oob_data(struct hci_dev *hdev, void *data,
1317 struct sk_buff *skb)
1318 {
1319 struct hci_rp_read_local_oob_data *rp = data;
1320
1321 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1322
1323 return rp->status;
1324 }
1325
hci_cc_read_local_oob_ext_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1326 static u8 hci_cc_read_local_oob_ext_data(struct hci_dev *hdev, void *data,
1327 struct sk_buff *skb)
1328 {
1329 struct hci_rp_read_local_oob_ext_data *rp = data;
1330
1331 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1332
1333 return rp->status;
1334 }
1335
hci_cc_le_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1336 static u8 hci_cc_le_set_random_addr(struct hci_dev *hdev, void *data,
1337 struct sk_buff *skb)
1338 {
1339 struct hci_ev_status *rp = data;
1340 bdaddr_t *sent;
1341
1342 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1343
1344 if (rp->status)
1345 return rp->status;
1346
1347 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR);
1348 if (!sent)
1349 return rp->status;
1350
1351 hci_dev_lock(hdev);
1352
1353 bacpy(&hdev->random_addr, sent);
1354
1355 if (!bacmp(&hdev->rpa, sent)) {
1356 hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED);
1357 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired,
1358 secs_to_jiffies(hdev->rpa_timeout));
1359 }
1360
1361 hci_dev_unlock(hdev);
1362
1363 return rp->status;
1364 }
1365
hci_cc_le_set_default_phy(struct hci_dev * hdev,void * data,struct sk_buff * skb)1366 static u8 hci_cc_le_set_default_phy(struct hci_dev *hdev, void *data,
1367 struct sk_buff *skb)
1368 {
1369 struct hci_ev_status *rp = data;
1370 struct hci_cp_le_set_default_phy *cp;
1371
1372 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1373
1374 if (rp->status)
1375 return rp->status;
1376
1377 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY);
1378 if (!cp)
1379 return rp->status;
1380
1381 hci_dev_lock(hdev);
1382
1383 hdev->le_tx_def_phys = cp->tx_phys;
1384 hdev->le_rx_def_phys = cp->rx_phys;
1385
1386 hci_dev_unlock(hdev);
1387
1388 return rp->status;
1389 }
1390
hci_cc_le_set_adv_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1391 static u8 hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, void *data,
1392 struct sk_buff *skb)
1393 {
1394 struct hci_ev_status *rp = data;
1395 struct hci_cp_le_set_adv_set_rand_addr *cp;
1396 struct adv_info *adv;
1397
1398 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1399
1400 if (rp->status)
1401 return rp->status;
1402
1403 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR);
1404 /* Update only in case the adv instance since handle 0x00 shall be using
1405 * HCI_OP_LE_SET_RANDOM_ADDR since that allows both extended and
1406 * non-extended adverting.
1407 */
1408 if (!cp || !cp->handle)
1409 return rp->status;
1410
1411 hci_dev_lock(hdev);
1412
1413 adv = hci_find_adv_instance(hdev, cp->handle);
1414 if (adv) {
1415 bacpy(&adv->random_addr, &cp->bdaddr);
1416 if (!bacmp(&hdev->rpa, &cp->bdaddr)) {
1417 adv->rpa_expired = false;
1418 queue_delayed_work(hdev->workqueue,
1419 &adv->rpa_expired_cb,
1420 secs_to_jiffies(hdev->rpa_timeout));
1421 }
1422 }
1423
1424 hci_dev_unlock(hdev);
1425
1426 return rp->status;
1427 }
1428
hci_cc_le_remove_adv_set(struct hci_dev * hdev,void * data,struct sk_buff * skb)1429 static u8 hci_cc_le_remove_adv_set(struct hci_dev *hdev, void *data,
1430 struct sk_buff *skb)
1431 {
1432 struct hci_ev_status *rp = data;
1433 u8 *instance;
1434 int err;
1435
1436 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1437
1438 if (rp->status)
1439 return rp->status;
1440
1441 instance = hci_sent_cmd_data(hdev, HCI_OP_LE_REMOVE_ADV_SET);
1442 if (!instance)
1443 return rp->status;
1444
1445 hci_dev_lock(hdev);
1446
1447 err = hci_remove_adv_instance(hdev, *instance);
1448 if (!err)
1449 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), hdev,
1450 *instance);
1451
1452 hci_dev_unlock(hdev);
1453
1454 return rp->status;
1455 }
1456
hci_cc_le_clear_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1457 static u8 hci_cc_le_clear_adv_sets(struct hci_dev *hdev, void *data,
1458 struct sk_buff *skb)
1459 {
1460 struct hci_ev_status *rp = data;
1461 struct adv_info *adv, *n;
1462 int err;
1463
1464 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1465
1466 if (rp->status)
1467 return rp->status;
1468
1469 if (!hci_sent_cmd_data(hdev, HCI_OP_LE_CLEAR_ADV_SETS))
1470 return rp->status;
1471
1472 hci_dev_lock(hdev);
1473
1474 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1475 u8 instance = adv->instance;
1476
1477 err = hci_remove_adv_instance(hdev, instance);
1478 if (!err)
1479 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd),
1480 hdev, instance);
1481 }
1482
1483 hci_dev_unlock(hdev);
1484
1485 return rp->status;
1486 }
1487
hci_cc_le_read_transmit_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1488 static u8 hci_cc_le_read_transmit_power(struct hci_dev *hdev, void *data,
1489 struct sk_buff *skb)
1490 {
1491 struct hci_rp_le_read_transmit_power *rp = data;
1492
1493 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1494
1495 if (rp->status)
1496 return rp->status;
1497
1498 hdev->min_le_tx_power = rp->min_le_tx_power;
1499 hdev->max_le_tx_power = rp->max_le_tx_power;
1500
1501 return rp->status;
1502 }
1503
hci_cc_le_set_privacy_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)1504 static u8 hci_cc_le_set_privacy_mode(struct hci_dev *hdev, void *data,
1505 struct sk_buff *skb)
1506 {
1507 struct hci_ev_status *rp = data;
1508 struct hci_cp_le_set_privacy_mode *cp;
1509 struct hci_conn_params *params;
1510
1511 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1512
1513 if (rp->status)
1514 return rp->status;
1515
1516 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PRIVACY_MODE);
1517 if (!cp)
1518 return rp->status;
1519
1520 hci_dev_lock(hdev);
1521
1522 params = hci_conn_params_lookup(hdev, &cp->bdaddr, cp->bdaddr_type);
1523 if (params)
1524 WRITE_ONCE(params->privacy_mode, cp->mode);
1525
1526 hci_dev_unlock(hdev);
1527
1528 return rp->status;
1529 }
1530
hci_cc_le_set_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1531 static u8 hci_cc_le_set_adv_enable(struct hci_dev *hdev, void *data,
1532 struct sk_buff *skb)
1533 {
1534 struct hci_ev_status *rp = data;
1535 __u8 *sent;
1536
1537 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1538
1539 if (rp->status)
1540 return rp->status;
1541
1542 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE);
1543 if (!sent)
1544 return rp->status;
1545
1546 hci_dev_lock(hdev);
1547
1548 /* If we're doing connection initiation as peripheral. Set a
1549 * timeout in case something goes wrong.
1550 */
1551 if (*sent) {
1552 struct hci_conn *conn;
1553
1554 hci_dev_set_flag(hdev, HCI_LE_ADV);
1555
1556 conn = hci_lookup_le_connect(hdev);
1557 if (conn)
1558 queue_delayed_work(hdev->workqueue,
1559 &conn->le_conn_timeout,
1560 conn->conn_timeout);
1561 } else {
1562 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1563 }
1564
1565 hci_dev_unlock(hdev);
1566
1567 return rp->status;
1568 }
1569
hci_cc_le_set_ext_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1570 static u8 hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev, void *data,
1571 struct sk_buff *skb)
1572 {
1573 struct hci_cp_le_set_ext_adv_enable *cp;
1574 struct hci_cp_ext_adv_set *set;
1575 struct adv_info *adv = NULL, *n;
1576 struct hci_ev_status *rp = data;
1577
1578 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1579
1580 if (rp->status)
1581 return rp->status;
1582
1583 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE);
1584 if (!cp)
1585 return rp->status;
1586
1587 set = (void *)cp->data;
1588
1589 hci_dev_lock(hdev);
1590
1591 if (cp->num_of_sets)
1592 adv = hci_find_adv_instance(hdev, set->handle);
1593
1594 if (cp->enable) {
1595 struct hci_conn *conn;
1596
1597 hci_dev_set_flag(hdev, HCI_LE_ADV);
1598
1599 if (adv && !adv->periodic)
1600 adv->enabled = true;
1601
1602 conn = hci_lookup_le_connect(hdev);
1603 if (conn)
1604 queue_delayed_work(hdev->workqueue,
1605 &conn->le_conn_timeout,
1606 conn->conn_timeout);
1607 } else {
1608 if (cp->num_of_sets) {
1609 if (adv)
1610 adv->enabled = false;
1611
1612 /* If just one instance was disabled check if there are
1613 * any other instance enabled before clearing HCI_LE_ADV
1614 */
1615 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1616 list) {
1617 if (adv->enabled)
1618 goto unlock;
1619 }
1620 } else {
1621 /* All instances shall be considered disabled */
1622 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1623 list)
1624 adv->enabled = false;
1625 }
1626
1627 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1628 }
1629
1630 unlock:
1631 hci_dev_unlock(hdev);
1632 return rp->status;
1633 }
1634
hci_cc_le_set_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1635 static u8 hci_cc_le_set_scan_param(struct hci_dev *hdev, void *data,
1636 struct sk_buff *skb)
1637 {
1638 struct hci_cp_le_set_scan_param *cp;
1639 struct hci_ev_status *rp = data;
1640
1641 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1642
1643 if (rp->status)
1644 return rp->status;
1645
1646 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM);
1647 if (!cp)
1648 return rp->status;
1649
1650 hci_dev_lock(hdev);
1651
1652 hdev->le_scan_type = cp->type;
1653
1654 hci_dev_unlock(hdev);
1655
1656 return rp->status;
1657 }
1658
hci_cc_le_set_ext_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1659 static u8 hci_cc_le_set_ext_scan_param(struct hci_dev *hdev, void *data,
1660 struct sk_buff *skb)
1661 {
1662 struct hci_cp_le_set_ext_scan_params *cp;
1663 struct hci_ev_status *rp = data;
1664 struct hci_cp_le_scan_phy_params *phy_param;
1665
1666 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1667
1668 if (rp->status)
1669 return rp->status;
1670
1671 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS);
1672 if (!cp)
1673 return rp->status;
1674
1675 phy_param = (void *)cp->data;
1676
1677 hci_dev_lock(hdev);
1678
1679 hdev->le_scan_type = phy_param->type;
1680
1681 hci_dev_unlock(hdev);
1682
1683 return rp->status;
1684 }
1685
has_pending_adv_report(struct hci_dev * hdev)1686 static bool has_pending_adv_report(struct hci_dev *hdev)
1687 {
1688 struct discovery_state *d = &hdev->discovery;
1689
1690 return bacmp(&d->last_adv_addr, BDADDR_ANY);
1691 }
1692
clear_pending_adv_report(struct hci_dev * hdev)1693 static void clear_pending_adv_report(struct hci_dev *hdev)
1694 {
1695 struct discovery_state *d = &hdev->discovery;
1696
1697 bacpy(&d->last_adv_addr, BDADDR_ANY);
1698 d->last_adv_data_len = 0;
1699 }
1700
store_pending_adv_report(struct hci_dev * hdev,bdaddr_t * bdaddr,u8 bdaddr_type,s8 rssi,u32 flags,u8 * data,u8 len)1701 static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr,
1702 u8 bdaddr_type, s8 rssi, u32 flags,
1703 u8 *data, u8 len)
1704 {
1705 struct discovery_state *d = &hdev->discovery;
1706
1707 if (len > max_adv_len(hdev))
1708 return;
1709
1710 bacpy(&d->last_adv_addr, bdaddr);
1711 d->last_adv_addr_type = bdaddr_type;
1712 d->last_adv_rssi = rssi;
1713 d->last_adv_flags = flags;
1714 memcpy(d->last_adv_data, data, len);
1715 d->last_adv_data_len = len;
1716 }
1717
le_set_scan_enable_complete(struct hci_dev * hdev,u8 enable)1718 static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable)
1719 {
1720 hci_dev_lock(hdev);
1721
1722 switch (enable) {
1723 case LE_SCAN_ENABLE:
1724 hci_dev_set_flag(hdev, HCI_LE_SCAN);
1725 if (hdev->le_scan_type == LE_SCAN_ACTIVE)
1726 clear_pending_adv_report(hdev);
1727 if (hci_dev_test_flag(hdev, HCI_MESH))
1728 hci_discovery_set_state(hdev, DISCOVERY_FINDING);
1729 break;
1730
1731 case LE_SCAN_DISABLE:
1732 /* We do this here instead of when setting DISCOVERY_STOPPED
1733 * since the latter would potentially require waiting for
1734 * inquiry to stop too.
1735 */
1736 if (has_pending_adv_report(hdev)) {
1737 struct discovery_state *d = &hdev->discovery;
1738
1739 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
1740 d->last_adv_addr_type, NULL,
1741 d->last_adv_rssi, d->last_adv_flags,
1742 d->last_adv_data,
1743 d->last_adv_data_len, NULL, 0, 0);
1744 }
1745
1746 /* Cancel this timer so that we don't try to disable scanning
1747 * when it's already disabled.
1748 */
1749 cancel_delayed_work(&hdev->le_scan_disable);
1750
1751 hci_dev_clear_flag(hdev, HCI_LE_SCAN);
1752
1753 /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we
1754 * interrupted scanning due to a connect request. Mark
1755 * therefore discovery as stopped.
1756 */
1757 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED))
1758 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1759 else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) &&
1760 hdev->discovery.state == DISCOVERY_FINDING)
1761 queue_work(hdev->workqueue, &hdev->reenable_adv_work);
1762
1763 break;
1764
1765 default:
1766 bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d",
1767 enable);
1768 break;
1769 }
1770
1771 hci_dev_unlock(hdev);
1772 }
1773
hci_cc_le_set_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1774 static u8 hci_cc_le_set_scan_enable(struct hci_dev *hdev, void *data,
1775 struct sk_buff *skb)
1776 {
1777 struct hci_cp_le_set_scan_enable *cp;
1778 struct hci_ev_status *rp = data;
1779
1780 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1781
1782 if (rp->status)
1783 return rp->status;
1784
1785 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
1786 if (!cp)
1787 return rp->status;
1788
1789 le_set_scan_enable_complete(hdev, cp->enable);
1790
1791 return rp->status;
1792 }
1793
hci_cc_le_set_ext_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1794 static u8 hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev, void *data,
1795 struct sk_buff *skb)
1796 {
1797 struct hci_cp_le_set_ext_scan_enable *cp;
1798 struct hci_ev_status *rp = data;
1799
1800 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1801
1802 if (rp->status)
1803 return rp->status;
1804
1805 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE);
1806 if (!cp)
1807 return rp->status;
1808
1809 le_set_scan_enable_complete(hdev, cp->enable);
1810
1811 return rp->status;
1812 }
1813
hci_cc_le_read_num_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1814 static u8 hci_cc_le_read_num_adv_sets(struct hci_dev *hdev, void *data,
1815 struct sk_buff *skb)
1816 {
1817 struct hci_rp_le_read_num_supported_adv_sets *rp = data;
1818
1819 bt_dev_dbg(hdev, "status 0x%2.2x No of Adv sets %u", rp->status,
1820 rp->num_of_sets);
1821
1822 if (rp->status)
1823 return rp->status;
1824
1825 hdev->le_num_of_adv_sets = rp->num_of_sets;
1826
1827 return rp->status;
1828 }
1829
hci_cc_le_read_accept_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1830 static u8 hci_cc_le_read_accept_list_size(struct hci_dev *hdev, void *data,
1831 struct sk_buff *skb)
1832 {
1833 struct hci_rp_le_read_accept_list_size *rp = data;
1834
1835 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
1836
1837 if (rp->status)
1838 return rp->status;
1839
1840 hdev->le_accept_list_size = rp->size;
1841
1842 return rp->status;
1843 }
1844
hci_cc_le_clear_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1845 static u8 hci_cc_le_clear_accept_list(struct hci_dev *hdev, void *data,
1846 struct sk_buff *skb)
1847 {
1848 struct hci_ev_status *rp = data;
1849
1850 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1851
1852 if (rp->status)
1853 return rp->status;
1854
1855 hci_dev_lock(hdev);
1856 hci_bdaddr_list_clear(&hdev->le_accept_list);
1857 hci_dev_unlock(hdev);
1858
1859 return rp->status;
1860 }
1861
hci_cc_le_add_to_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1862 static u8 hci_cc_le_add_to_accept_list(struct hci_dev *hdev, void *data,
1863 struct sk_buff *skb)
1864 {
1865 struct hci_cp_le_add_to_accept_list *sent;
1866 struct hci_ev_status *rp = data;
1867
1868 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1869
1870 if (rp->status)
1871 return rp->status;
1872
1873 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
1874 if (!sent)
1875 return rp->status;
1876
1877 hci_dev_lock(hdev);
1878 hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr,
1879 sent->bdaddr_type);
1880 hci_dev_unlock(hdev);
1881
1882 return rp->status;
1883 }
1884
hci_cc_le_del_from_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1885 static u8 hci_cc_le_del_from_accept_list(struct hci_dev *hdev, void *data,
1886 struct sk_buff *skb)
1887 {
1888 struct hci_cp_le_del_from_accept_list *sent;
1889 struct hci_ev_status *rp = data;
1890
1891 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1892
1893 if (rp->status)
1894 return rp->status;
1895
1896 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST);
1897 if (!sent)
1898 return rp->status;
1899
1900 hci_dev_lock(hdev);
1901 hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr,
1902 sent->bdaddr_type);
1903 hci_dev_unlock(hdev);
1904
1905 return rp->status;
1906 }
1907
hci_cc_le_read_supported_states(struct hci_dev * hdev,void * data,struct sk_buff * skb)1908 static u8 hci_cc_le_read_supported_states(struct hci_dev *hdev, void *data,
1909 struct sk_buff *skb)
1910 {
1911 struct hci_rp_le_read_supported_states *rp = data;
1912
1913 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1914
1915 if (rp->status)
1916 return rp->status;
1917
1918 memcpy(hdev->le_states, rp->le_states, 8);
1919
1920 return rp->status;
1921 }
1922
hci_cc_le_read_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1923 static u8 hci_cc_le_read_def_data_len(struct hci_dev *hdev, void *data,
1924 struct sk_buff *skb)
1925 {
1926 struct hci_rp_le_read_def_data_len *rp = data;
1927
1928 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1929
1930 if (rp->status)
1931 return rp->status;
1932
1933 hdev->le_def_tx_len = le16_to_cpu(rp->tx_len);
1934 hdev->le_def_tx_time = le16_to_cpu(rp->tx_time);
1935
1936 return rp->status;
1937 }
1938
hci_cc_le_write_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1939 static u8 hci_cc_le_write_def_data_len(struct hci_dev *hdev, void *data,
1940 struct sk_buff *skb)
1941 {
1942 struct hci_cp_le_write_def_data_len *sent;
1943 struct hci_ev_status *rp = data;
1944
1945 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1946
1947 if (rp->status)
1948 return rp->status;
1949
1950 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN);
1951 if (!sent)
1952 return rp->status;
1953
1954 hdev->le_def_tx_len = le16_to_cpu(sent->tx_len);
1955 hdev->le_def_tx_time = le16_to_cpu(sent->tx_time);
1956
1957 return rp->status;
1958 }
1959
hci_cc_le_add_to_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1960 static u8 hci_cc_le_add_to_resolv_list(struct hci_dev *hdev, void *data,
1961 struct sk_buff *skb)
1962 {
1963 struct hci_cp_le_add_to_resolv_list *sent;
1964 struct hci_ev_status *rp = data;
1965
1966 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1967
1968 if (rp->status)
1969 return rp->status;
1970
1971 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST);
1972 if (!sent)
1973 return rp->status;
1974
1975 hci_dev_lock(hdev);
1976 hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
1977 sent->bdaddr_type, sent->peer_irk,
1978 sent->local_irk);
1979 hci_dev_unlock(hdev);
1980
1981 return rp->status;
1982 }
1983
hci_cc_le_del_from_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1984 static u8 hci_cc_le_del_from_resolv_list(struct hci_dev *hdev, void *data,
1985 struct sk_buff *skb)
1986 {
1987 struct hci_cp_le_del_from_resolv_list *sent;
1988 struct hci_ev_status *rp = data;
1989
1990 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1991
1992 if (rp->status)
1993 return rp->status;
1994
1995 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST);
1996 if (!sent)
1997 return rp->status;
1998
1999 hci_dev_lock(hdev);
2000 hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
2001 sent->bdaddr_type);
2002 hci_dev_unlock(hdev);
2003
2004 return rp->status;
2005 }
2006
hci_cc_le_clear_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)2007 static u8 hci_cc_le_clear_resolv_list(struct hci_dev *hdev, void *data,
2008 struct sk_buff *skb)
2009 {
2010 struct hci_ev_status *rp = data;
2011
2012 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2013
2014 if (rp->status)
2015 return rp->status;
2016
2017 hci_dev_lock(hdev);
2018 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2019 hci_dev_unlock(hdev);
2020
2021 return rp->status;
2022 }
2023
hci_cc_le_read_resolv_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)2024 static u8 hci_cc_le_read_resolv_list_size(struct hci_dev *hdev, void *data,
2025 struct sk_buff *skb)
2026 {
2027 struct hci_rp_le_read_resolv_list_size *rp = data;
2028
2029 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
2030
2031 if (rp->status)
2032 return rp->status;
2033
2034 hdev->le_resolv_list_size = rp->size;
2035
2036 return rp->status;
2037 }
2038
hci_cc_le_set_addr_resolution_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)2039 static u8 hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev, void *data,
2040 struct sk_buff *skb)
2041 {
2042 struct hci_ev_status *rp = data;
2043 __u8 *sent;
2044
2045 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2046
2047 if (rp->status)
2048 return rp->status;
2049
2050 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE);
2051 if (!sent)
2052 return rp->status;
2053
2054 hci_dev_lock(hdev);
2055
2056 if (*sent)
2057 hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION);
2058 else
2059 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);
2060
2061 hci_dev_unlock(hdev);
2062
2063 return rp->status;
2064 }
2065
hci_cc_le_read_max_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)2066 static u8 hci_cc_le_read_max_data_len(struct hci_dev *hdev, void *data,
2067 struct sk_buff *skb)
2068 {
2069 struct hci_rp_le_read_max_data_len *rp = data;
2070
2071 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2072
2073 if (rp->status)
2074 return rp->status;
2075
2076 hdev->le_max_tx_len = le16_to_cpu(rp->tx_len);
2077 hdev->le_max_tx_time = le16_to_cpu(rp->tx_time);
2078 hdev->le_max_rx_len = le16_to_cpu(rp->rx_len);
2079 hdev->le_max_rx_time = le16_to_cpu(rp->rx_time);
2080
2081 return rp->status;
2082 }
2083
hci_cc_write_le_host_supported(struct hci_dev * hdev,void * data,struct sk_buff * skb)2084 static u8 hci_cc_write_le_host_supported(struct hci_dev *hdev, void *data,
2085 struct sk_buff *skb)
2086 {
2087 struct hci_cp_write_le_host_supported *sent;
2088 struct hci_ev_status *rp = data;
2089
2090 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2091
2092 if (rp->status)
2093 return rp->status;
2094
2095 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED);
2096 if (!sent)
2097 return rp->status;
2098
2099 hci_dev_lock(hdev);
2100
2101 if (sent->le) {
2102 hdev->features[1][0] |= LMP_HOST_LE;
2103 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
2104 } else {
2105 hdev->features[1][0] &= ~LMP_HOST_LE;
2106 hci_dev_clear_flag(hdev, HCI_LE_ENABLED);
2107 hci_dev_clear_flag(hdev, HCI_ADVERTISING);
2108 }
2109
2110 if (sent->simul)
2111 hdev->features[1][0] |= LMP_HOST_LE_BREDR;
2112 else
2113 hdev->features[1][0] &= ~LMP_HOST_LE_BREDR;
2114
2115 hci_dev_unlock(hdev);
2116
2117 return rp->status;
2118 }
2119
hci_cc_set_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2120 static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data,
2121 struct sk_buff *skb)
2122 {
2123 struct hci_cp_le_set_adv_param *cp;
2124 struct hci_ev_status *rp = data;
2125
2126 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2127
2128 if (rp->status)
2129 return rp->status;
2130
2131 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM);
2132 if (!cp)
2133 return rp->status;
2134
2135 hci_dev_lock(hdev);
2136 hdev->adv_addr_type = cp->own_address_type;
2137 hci_dev_unlock(hdev);
2138
2139 return rp->status;
2140 }
2141
hci_cc_set_ext_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2142 static u8 hci_cc_set_ext_adv_param(struct hci_dev *hdev, void *data,
2143 struct sk_buff *skb)
2144 {
2145 struct hci_rp_le_set_ext_adv_params *rp = data;
2146 struct hci_cp_le_set_ext_adv_params *cp;
2147 struct adv_info *adv_instance;
2148
2149 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2150
2151 if (rp->status)
2152 return rp->status;
2153
2154 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS);
2155 if (!cp)
2156 return rp->status;
2157
2158 hci_dev_lock(hdev);
2159 hdev->adv_addr_type = cp->own_addr_type;
2160 if (!cp->handle) {
2161 /* Store in hdev for instance 0 */
2162 hdev->adv_tx_power = rp->tx_power;
2163 } else {
2164 adv_instance = hci_find_adv_instance(hdev, cp->handle);
2165 if (adv_instance)
2166 adv_instance->tx_power = rp->tx_power;
2167 }
2168 /* Update adv data as tx power is known now */
2169 hci_update_adv_data(hdev, cp->handle);
2170
2171 hci_dev_unlock(hdev);
2172
2173 return rp->status;
2174 }
2175
hci_cc_read_rssi(struct hci_dev * hdev,void * data,struct sk_buff * skb)2176 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data,
2177 struct sk_buff *skb)
2178 {
2179 struct hci_rp_read_rssi *rp = data;
2180 struct hci_conn *conn;
2181
2182 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2183
2184 if (rp->status)
2185 return rp->status;
2186
2187 hci_dev_lock(hdev);
2188
2189 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2190 if (conn)
2191 conn->rssi = rp->rssi;
2192
2193 hci_dev_unlock(hdev);
2194
2195 return rp->status;
2196 }
2197
hci_cc_read_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)2198 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data,
2199 struct sk_buff *skb)
2200 {
2201 struct hci_cp_read_tx_power *sent;
2202 struct hci_rp_read_tx_power *rp = data;
2203 struct hci_conn *conn;
2204
2205 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2206
2207 if (rp->status)
2208 return rp->status;
2209
2210 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
2211 if (!sent)
2212 return rp->status;
2213
2214 hci_dev_lock(hdev);
2215
2216 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2217 if (!conn)
2218 goto unlock;
2219
2220 switch (sent->type) {
2221 case 0x00:
2222 conn->tx_power = rp->tx_power;
2223 break;
2224 case 0x01:
2225 conn->max_tx_power = rp->tx_power;
2226 break;
2227 }
2228
2229 unlock:
2230 hci_dev_unlock(hdev);
2231 return rp->status;
2232 }
2233
hci_cc_write_ssp_debug_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)2234 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data,
2235 struct sk_buff *skb)
2236 {
2237 struct hci_ev_status *rp = data;
2238 u8 *mode;
2239
2240 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2241
2242 if (rp->status)
2243 return rp->status;
2244
2245 mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
2246 if (mode)
2247 hdev->ssp_debug_mode = *mode;
2248
2249 return rp->status;
2250 }
2251
hci_cs_inquiry(struct hci_dev * hdev,__u8 status)2252 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
2253 {
2254 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2255
2256 if (status)
2257 return;
2258
2259 if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
2260 set_bit(HCI_INQUIRY, &hdev->flags);
2261 }
2262
hci_cs_create_conn(struct hci_dev * hdev,__u8 status)2263 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
2264 {
2265 struct hci_cp_create_conn *cp;
2266 struct hci_conn *conn;
2267
2268 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2269
2270 cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
2271 if (!cp)
2272 return;
2273
2274 hci_dev_lock(hdev);
2275
2276 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2277
2278 bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn);
2279
2280 if (status) {
2281 if (conn && conn->state == BT_CONNECT) {
2282 conn->state = BT_CLOSED;
2283 hci_connect_cfm(conn, status);
2284 hci_conn_del(conn);
2285 }
2286 } else {
2287 if (!conn) {
2288 conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
2289 HCI_ROLE_MASTER);
2290 if (IS_ERR(conn))
2291 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
2292 }
2293 }
2294
2295 hci_dev_unlock(hdev);
2296 }
2297
hci_cs_add_sco(struct hci_dev * hdev,__u8 status)2298 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
2299 {
2300 struct hci_cp_add_sco *cp;
2301 struct hci_conn *acl;
2302 struct hci_link *link;
2303 __u16 handle;
2304
2305 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2306
2307 if (!status)
2308 return;
2309
2310 cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
2311 if (!cp)
2312 return;
2313
2314 handle = __le16_to_cpu(cp->handle);
2315
2316 bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
2317
2318 hci_dev_lock(hdev);
2319
2320 acl = hci_conn_hash_lookup_handle(hdev, handle);
2321 if (acl) {
2322 link = list_first_entry_or_null(&acl->link_list,
2323 struct hci_link, list);
2324 if (link && link->conn) {
2325 link->conn->state = BT_CLOSED;
2326
2327 hci_connect_cfm(link->conn, status);
2328 hci_conn_del(link->conn);
2329 }
2330 }
2331
2332 hci_dev_unlock(hdev);
2333 }
2334
hci_cs_auth_requested(struct hci_dev * hdev,__u8 status)2335 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
2336 {
2337 struct hci_cp_auth_requested *cp;
2338 struct hci_conn *conn;
2339
2340 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2341
2342 if (!status)
2343 return;
2344
2345 cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
2346 if (!cp)
2347 return;
2348
2349 hci_dev_lock(hdev);
2350
2351 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2352 if (conn) {
2353 if (conn->state == BT_CONFIG) {
2354 hci_connect_cfm(conn, status);
2355 hci_conn_drop(conn);
2356 }
2357 }
2358
2359 hci_dev_unlock(hdev);
2360 }
2361
hci_cs_set_conn_encrypt(struct hci_dev * hdev,__u8 status)2362 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
2363 {
2364 struct hci_cp_set_conn_encrypt *cp;
2365 struct hci_conn *conn;
2366
2367 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2368
2369 if (!status)
2370 return;
2371
2372 cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
2373 if (!cp)
2374 return;
2375
2376 hci_dev_lock(hdev);
2377
2378 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2379 if (conn) {
2380 if (conn->state == BT_CONFIG) {
2381 hci_connect_cfm(conn, status);
2382 hci_conn_drop(conn);
2383 }
2384 }
2385
2386 hci_dev_unlock(hdev);
2387 }
2388
hci_outgoing_auth_needed(struct hci_dev * hdev,struct hci_conn * conn)2389 static int hci_outgoing_auth_needed(struct hci_dev *hdev,
2390 struct hci_conn *conn)
2391 {
2392 if (conn->state != BT_CONFIG || !conn->out)
2393 return 0;
2394
2395 if (conn->pending_sec_level == BT_SECURITY_SDP)
2396 return 0;
2397
2398 /* Only request authentication for SSP connections or non-SSP
2399 * devices with sec_level MEDIUM or HIGH or if MITM protection
2400 * is requested.
2401 */
2402 if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
2403 conn->pending_sec_level != BT_SECURITY_FIPS &&
2404 conn->pending_sec_level != BT_SECURITY_HIGH &&
2405 conn->pending_sec_level != BT_SECURITY_MEDIUM)
2406 return 0;
2407
2408 return 1;
2409 }
2410
hci_resolve_name(struct hci_dev * hdev,struct inquiry_entry * e)2411 static int hci_resolve_name(struct hci_dev *hdev,
2412 struct inquiry_entry *e)
2413 {
2414 struct hci_cp_remote_name_req cp;
2415
2416 memset(&cp, 0, sizeof(cp));
2417
2418 bacpy(&cp.bdaddr, &e->data.bdaddr);
2419 cp.pscan_rep_mode = e->data.pscan_rep_mode;
2420 cp.pscan_mode = e->data.pscan_mode;
2421 cp.clock_offset = e->data.clock_offset;
2422
2423 return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
2424 }
2425
hci_resolve_next_name(struct hci_dev * hdev)2426 static bool hci_resolve_next_name(struct hci_dev *hdev)
2427 {
2428 struct discovery_state *discov = &hdev->discovery;
2429 struct inquiry_entry *e;
2430
2431 if (list_empty(&discov->resolve))
2432 return false;
2433
2434 /* We should stop if we already spent too much time resolving names. */
2435 if (time_after(jiffies, discov->name_resolve_timeout)) {
2436 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long.");
2437 return false;
2438 }
2439
2440 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2441 if (!e)
2442 return false;
2443
2444 if (hci_resolve_name(hdev, e) == 0) {
2445 e->name_state = NAME_PENDING;
2446 return true;
2447 }
2448
2449 return false;
2450 }
2451
hci_check_pending_name(struct hci_dev * hdev,struct hci_conn * conn,bdaddr_t * bdaddr,u8 * name,u8 name_len)2452 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
2453 bdaddr_t *bdaddr, u8 *name, u8 name_len)
2454 {
2455 struct discovery_state *discov = &hdev->discovery;
2456 struct inquiry_entry *e;
2457
2458 /* Update the mgmt connected state if necessary. Be careful with
2459 * conn objects that exist but are not (yet) connected however.
2460 * Only those in BT_CONFIG or BT_CONNECTED states can be
2461 * considered connected.
2462 */
2463 if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED))
2464 mgmt_device_connected(hdev, conn, name, name_len);
2465
2466 if (discov->state == DISCOVERY_STOPPED)
2467 return;
2468
2469 if (discov->state == DISCOVERY_STOPPING)
2470 goto discov_complete;
2471
2472 if (discov->state != DISCOVERY_RESOLVING)
2473 return;
2474
2475 e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
2476 /* If the device was not found in a list of found devices names of which
2477 * are pending. there is no need to continue resolving a next name as it
2478 * will be done upon receiving another Remote Name Request Complete
2479 * Event */
2480 if (!e)
2481 return;
2482
2483 list_del(&e->list);
2484
2485 e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN;
2486 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi,
2487 name, name_len);
2488
2489 if (hci_resolve_next_name(hdev))
2490 return;
2491
2492 discov_complete:
2493 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2494 }
2495
hci_cs_remote_name_req(struct hci_dev * hdev,__u8 status)2496 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
2497 {
2498 struct hci_cp_remote_name_req *cp;
2499 struct hci_conn *conn;
2500
2501 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2502
2503 /* If successful wait for the name req complete event before
2504 * checking for the need to do authentication */
2505 if (!status)
2506 return;
2507
2508 cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
2509 if (!cp)
2510 return;
2511
2512 hci_dev_lock(hdev);
2513
2514 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2515
2516 if (hci_dev_test_flag(hdev, HCI_MGMT))
2517 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
2518
2519 if (!conn)
2520 goto unlock;
2521
2522 if (!hci_outgoing_auth_needed(hdev, conn))
2523 goto unlock;
2524
2525 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2526 struct hci_cp_auth_requested auth_cp;
2527
2528 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2529
2530 auth_cp.handle = __cpu_to_le16(conn->handle);
2531 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
2532 sizeof(auth_cp), &auth_cp);
2533 }
2534
2535 unlock:
2536 hci_dev_unlock(hdev);
2537 }
2538
hci_cs_read_remote_features(struct hci_dev * hdev,__u8 status)2539 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
2540 {
2541 struct hci_cp_read_remote_features *cp;
2542 struct hci_conn *conn;
2543
2544 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2545
2546 if (!status)
2547 return;
2548
2549 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
2550 if (!cp)
2551 return;
2552
2553 hci_dev_lock(hdev);
2554
2555 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2556 if (conn) {
2557 if (conn->state == BT_CONFIG) {
2558 hci_connect_cfm(conn, status);
2559 hci_conn_drop(conn);
2560 }
2561 }
2562
2563 hci_dev_unlock(hdev);
2564 }
2565
hci_cs_read_remote_ext_features(struct hci_dev * hdev,__u8 status)2566 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
2567 {
2568 struct hci_cp_read_remote_ext_features *cp;
2569 struct hci_conn *conn;
2570
2571 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2572
2573 if (!status)
2574 return;
2575
2576 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
2577 if (!cp)
2578 return;
2579
2580 hci_dev_lock(hdev);
2581
2582 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2583 if (conn) {
2584 if (conn->state == BT_CONFIG) {
2585 hci_connect_cfm(conn, status);
2586 hci_conn_drop(conn);
2587 }
2588 }
2589
2590 hci_dev_unlock(hdev);
2591 }
2592
hci_setup_sync_conn_status(struct hci_dev * hdev,__u16 handle,__u8 status)2593 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle,
2594 __u8 status)
2595 {
2596 struct hci_conn *acl;
2597 struct hci_link *link;
2598
2599 bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status);
2600
2601 hci_dev_lock(hdev);
2602
2603 acl = hci_conn_hash_lookup_handle(hdev, handle);
2604 if (acl) {
2605 link = list_first_entry_or_null(&acl->link_list,
2606 struct hci_link, list);
2607 if (link && link->conn) {
2608 link->conn->state = BT_CLOSED;
2609
2610 hci_connect_cfm(link->conn, status);
2611 hci_conn_del(link->conn);
2612 }
2613 }
2614
2615 hci_dev_unlock(hdev);
2616 }
2617
hci_cs_setup_sync_conn(struct hci_dev * hdev,__u8 status)2618 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2619 {
2620 struct hci_cp_setup_sync_conn *cp;
2621
2622 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2623
2624 if (!status)
2625 return;
2626
2627 cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
2628 if (!cp)
2629 return;
2630
2631 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2632 }
2633
hci_cs_enhanced_setup_sync_conn(struct hci_dev * hdev,__u8 status)2634 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2635 {
2636 struct hci_cp_enhanced_setup_sync_conn *cp;
2637
2638 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2639
2640 if (!status)
2641 return;
2642
2643 cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN);
2644 if (!cp)
2645 return;
2646
2647 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2648 }
2649
hci_cs_sniff_mode(struct hci_dev * hdev,__u8 status)2650 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
2651 {
2652 struct hci_cp_sniff_mode *cp;
2653 struct hci_conn *conn;
2654
2655 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2656
2657 if (!status)
2658 return;
2659
2660 cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
2661 if (!cp)
2662 return;
2663
2664 hci_dev_lock(hdev);
2665
2666 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2667 if (conn) {
2668 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2669
2670 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2671 hci_sco_setup(conn, status);
2672 }
2673
2674 hci_dev_unlock(hdev);
2675 }
2676
hci_cs_exit_sniff_mode(struct hci_dev * hdev,__u8 status)2677 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
2678 {
2679 struct hci_cp_exit_sniff_mode *cp;
2680 struct hci_conn *conn;
2681
2682 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2683
2684 if (!status)
2685 return;
2686
2687 cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
2688 if (!cp)
2689 return;
2690
2691 hci_dev_lock(hdev);
2692
2693 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2694 if (conn) {
2695 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2696
2697 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2698 hci_sco_setup(conn, status);
2699 }
2700
2701 hci_dev_unlock(hdev);
2702 }
2703
hci_cs_disconnect(struct hci_dev * hdev,u8 status)2704 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
2705 {
2706 struct hci_cp_disconnect *cp;
2707 struct hci_conn_params *params;
2708 struct hci_conn *conn;
2709 bool mgmt_conn;
2710
2711 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2712
2713 /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
2714 * otherwise cleanup the connection immediately.
2715 */
2716 if (!status && !hdev->suspended)
2717 return;
2718
2719 cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
2720 if (!cp)
2721 return;
2722
2723 hci_dev_lock(hdev);
2724
2725 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2726 if (!conn)
2727 goto unlock;
2728
2729 if (status) {
2730 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2731 conn->dst_type, status);
2732
2733 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
2734 hdev->cur_adv_instance = conn->adv_instance;
2735 hci_enable_advertising(hdev);
2736 }
2737
2738 /* Inform sockets conn is gone before we delete it */
2739 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED);
2740
2741 goto done;
2742 }
2743
2744 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
2745
2746 if (conn->type == ACL_LINK) {
2747 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
2748 hci_remove_link_key(hdev, &conn->dst);
2749 }
2750
2751 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
2752 if (params) {
2753 switch (params->auto_connect) {
2754 case HCI_AUTO_CONN_LINK_LOSS:
2755 if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT)
2756 break;
2757 fallthrough;
2758
2759 case HCI_AUTO_CONN_DIRECT:
2760 case HCI_AUTO_CONN_ALWAYS:
2761 hci_pend_le_list_del_init(params);
2762 hci_pend_le_list_add(params, &hdev->pend_le_conns);
2763 break;
2764
2765 default:
2766 break;
2767 }
2768 }
2769
2770 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
2771 cp->reason, mgmt_conn);
2772
2773 hci_disconn_cfm(conn, cp->reason);
2774
2775 done:
2776 /* If the disconnection failed for any reason, the upper layer
2777 * does not retry to disconnect in current implementation.
2778 * Hence, we need to do some basic cleanup here and re-enable
2779 * advertising if necessary.
2780 */
2781 hci_conn_del(conn);
2782 unlock:
2783 hci_dev_unlock(hdev);
2784 }
2785
ev_bdaddr_type(struct hci_dev * hdev,u8 type,bool * resolved)2786 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved)
2787 {
2788 /* When using controller based address resolution, then the new
2789 * address types 0x02 and 0x03 are used. These types need to be
2790 * converted back into either public address or random address type
2791 */
2792 switch (type) {
2793 case ADDR_LE_DEV_PUBLIC_RESOLVED:
2794 if (resolved)
2795 *resolved = true;
2796 return ADDR_LE_DEV_PUBLIC;
2797 case ADDR_LE_DEV_RANDOM_RESOLVED:
2798 if (resolved)
2799 *resolved = true;
2800 return ADDR_LE_DEV_RANDOM;
2801 }
2802
2803 if (resolved)
2804 *resolved = false;
2805 return type;
2806 }
2807
cs_le_create_conn(struct hci_dev * hdev,bdaddr_t * peer_addr,u8 peer_addr_type,u8 own_address_type,u8 filter_policy)2808 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
2809 u8 peer_addr_type, u8 own_address_type,
2810 u8 filter_policy)
2811 {
2812 struct hci_conn *conn;
2813
2814 conn = hci_conn_hash_lookup_le(hdev, peer_addr,
2815 peer_addr_type);
2816 if (!conn)
2817 return;
2818
2819 own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL);
2820
2821 /* Store the initiator and responder address information which
2822 * is needed for SMP. These values will not change during the
2823 * lifetime of the connection.
2824 */
2825 conn->init_addr_type = own_address_type;
2826 if (own_address_type == ADDR_LE_DEV_RANDOM)
2827 bacpy(&conn->init_addr, &hdev->random_addr);
2828 else
2829 bacpy(&conn->init_addr, &hdev->bdaddr);
2830
2831 conn->resp_addr_type = peer_addr_type;
2832 bacpy(&conn->resp_addr, peer_addr);
2833 }
2834
hci_cs_le_create_conn(struct hci_dev * hdev,u8 status)2835 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
2836 {
2837 struct hci_cp_le_create_conn *cp;
2838
2839 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2840
2841 /* All connection failure handling is taken care of by the
2842 * hci_conn_failed function which is triggered by the HCI
2843 * request completion callbacks used for connecting.
2844 */
2845 if (status)
2846 return;
2847
2848 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
2849 if (!cp)
2850 return;
2851
2852 hci_dev_lock(hdev);
2853
2854 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2855 cp->own_address_type, cp->filter_policy);
2856
2857 hci_dev_unlock(hdev);
2858 }
2859
hci_cs_le_ext_create_conn(struct hci_dev * hdev,u8 status)2860 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
2861 {
2862 struct hci_cp_le_ext_create_conn *cp;
2863
2864 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2865
2866 /* All connection failure handling is taken care of by the
2867 * hci_conn_failed function which is triggered by the HCI
2868 * request completion callbacks used for connecting.
2869 */
2870 if (status)
2871 return;
2872
2873 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
2874 if (!cp)
2875 return;
2876
2877 hci_dev_lock(hdev);
2878
2879 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2880 cp->own_addr_type, cp->filter_policy);
2881
2882 hci_dev_unlock(hdev);
2883 }
2884
hci_cs_le_read_remote_features(struct hci_dev * hdev,u8 status)2885 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
2886 {
2887 struct hci_cp_le_read_remote_features *cp;
2888 struct hci_conn *conn;
2889
2890 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2891
2892 if (!status)
2893 return;
2894
2895 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
2896 if (!cp)
2897 return;
2898
2899 hci_dev_lock(hdev);
2900
2901 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2902 if (conn) {
2903 if (conn->state == BT_CONFIG) {
2904 hci_connect_cfm(conn, status);
2905 hci_conn_drop(conn);
2906 }
2907 }
2908
2909 hci_dev_unlock(hdev);
2910 }
2911
hci_cs_le_start_enc(struct hci_dev * hdev,u8 status)2912 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
2913 {
2914 struct hci_cp_le_start_enc *cp;
2915 struct hci_conn *conn;
2916
2917 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2918
2919 if (!status)
2920 return;
2921
2922 hci_dev_lock(hdev);
2923
2924 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
2925 if (!cp)
2926 goto unlock;
2927
2928 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2929 if (!conn)
2930 goto unlock;
2931
2932 if (conn->state != BT_CONNECTED)
2933 goto unlock;
2934
2935 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
2936 hci_conn_drop(conn);
2937
2938 unlock:
2939 hci_dev_unlock(hdev);
2940 }
2941
hci_cs_switch_role(struct hci_dev * hdev,u8 status)2942 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
2943 {
2944 struct hci_cp_switch_role *cp;
2945 struct hci_conn *conn;
2946
2947 BT_DBG("%s status 0x%2.2x", hdev->name, status);
2948
2949 if (!status)
2950 return;
2951
2952 cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
2953 if (!cp)
2954 return;
2955
2956 hci_dev_lock(hdev);
2957
2958 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2959 if (conn)
2960 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
2961
2962 hci_dev_unlock(hdev);
2963 }
2964
hci_inquiry_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)2965 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data,
2966 struct sk_buff *skb)
2967 {
2968 struct hci_ev_status *ev = data;
2969 struct discovery_state *discov = &hdev->discovery;
2970 struct inquiry_entry *e;
2971
2972 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
2973
2974 if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
2975 return;
2976
2977 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
2978 wake_up_bit(&hdev->flags, HCI_INQUIRY);
2979
2980 if (!hci_dev_test_flag(hdev, HCI_MGMT))
2981 return;
2982
2983 hci_dev_lock(hdev);
2984
2985 if (discov->state != DISCOVERY_FINDING)
2986 goto unlock;
2987
2988 if (list_empty(&discov->resolve)) {
2989 /* When BR/EDR inquiry is active and no LE scanning is in
2990 * progress, then change discovery state to indicate completion.
2991 *
2992 * When running LE scanning and BR/EDR inquiry simultaneously
2993 * and the LE scan already finished, then change the discovery
2994 * state to indicate completion.
2995 */
2996 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2997 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
2998 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2999 goto unlock;
3000 }
3001
3002 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
3003 if (e && hci_resolve_name(hdev, e) == 0) {
3004 e->name_state = NAME_PENDING;
3005 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
3006 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION;
3007 } else {
3008 /* When BR/EDR inquiry is active and no LE scanning is in
3009 * progress, then change discovery state to indicate completion.
3010 *
3011 * When running LE scanning and BR/EDR inquiry simultaneously
3012 * and the LE scan already finished, then change the discovery
3013 * state to indicate completion.
3014 */
3015 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
3016 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
3017 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3018 }
3019
3020 unlock:
3021 hci_dev_unlock(hdev);
3022 }
3023
hci_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)3024 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata,
3025 struct sk_buff *skb)
3026 {
3027 struct hci_ev_inquiry_result *ev = edata;
3028 struct inquiry_data data;
3029 int i;
3030
3031 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT,
3032 flex_array_size(ev, info, ev->num)))
3033 return;
3034
3035 bt_dev_dbg(hdev, "num %d", ev->num);
3036
3037 if (!ev->num)
3038 return;
3039
3040 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
3041 return;
3042
3043 hci_dev_lock(hdev);
3044
3045 for (i = 0; i < ev->num; i++) {
3046 struct inquiry_info *info = &ev->info[i];
3047 u32 flags;
3048
3049 bacpy(&data.bdaddr, &info->bdaddr);
3050 data.pscan_rep_mode = info->pscan_rep_mode;
3051 data.pscan_period_mode = info->pscan_period_mode;
3052 data.pscan_mode = info->pscan_mode;
3053 memcpy(data.dev_class, info->dev_class, 3);
3054 data.clock_offset = info->clock_offset;
3055 data.rssi = HCI_RSSI_INVALID;
3056 data.ssp_mode = 0x00;
3057
3058 flags = hci_inquiry_cache_update(hdev, &data, false);
3059
3060 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3061 info->dev_class, HCI_RSSI_INVALID,
3062 flags, NULL, 0, NULL, 0, 0);
3063 }
3064
3065 hci_dev_unlock(hdev);
3066 }
3067
hci_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3068 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
3069 struct sk_buff *skb)
3070 {
3071 struct hci_ev_conn_complete *ev = data;
3072 struct hci_conn *conn;
3073 u8 status = ev->status;
3074
3075 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3076
3077 hci_dev_lock(hdev);
3078
3079 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
3080 if (!conn) {
3081 /* In case of error status and there is no connection pending
3082 * just unlock as there is nothing to cleanup.
3083 */
3084 if (ev->status)
3085 goto unlock;
3086
3087 /* Connection may not exist if auto-connected. Check the bredr
3088 * allowlist to see if this device is allowed to auto connect.
3089 * If link is an ACL type, create a connection class
3090 * automatically.
3091 *
3092 * Auto-connect will only occur if the event filter is
3093 * programmed with a given address. Right now, event filter is
3094 * only used during suspend.
3095 */
3096 if (ev->link_type == ACL_LINK &&
3097 hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
3098 &ev->bdaddr,
3099 BDADDR_BREDR)) {
3100 conn = hci_conn_add_unset(hdev, ev->link_type,
3101 &ev->bdaddr, HCI_ROLE_SLAVE);
3102 if (IS_ERR(conn)) {
3103 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3104 goto unlock;
3105 }
3106 } else {
3107 if (ev->link_type != SCO_LINK)
3108 goto unlock;
3109
3110 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK,
3111 &ev->bdaddr);
3112 if (!conn)
3113 goto unlock;
3114
3115 conn->type = SCO_LINK;
3116 }
3117 }
3118
3119 /* The HCI_Connection_Complete event is only sent once per connection.
3120 * Processing it more than once per connection can corrupt kernel memory.
3121 *
3122 * As the connection handle is set here for the first time, it indicates
3123 * whether the connection is already set up.
3124 */
3125 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
3126 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
3127 goto unlock;
3128 }
3129
3130 if (!status) {
3131 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
3132 if (status)
3133 goto done;
3134
3135 if (conn->type == ACL_LINK) {
3136 conn->state = BT_CONFIG;
3137 hci_conn_hold(conn);
3138
3139 if (!conn->out && !hci_conn_ssp_enabled(conn) &&
3140 !hci_find_link_key(hdev, &ev->bdaddr))
3141 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
3142 else
3143 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3144 } else
3145 conn->state = BT_CONNECTED;
3146
3147 hci_debugfs_create_conn(conn);
3148 hci_conn_add_sysfs(conn);
3149
3150 if (test_bit(HCI_AUTH, &hdev->flags))
3151 set_bit(HCI_CONN_AUTH, &conn->flags);
3152
3153 if (test_bit(HCI_ENCRYPT, &hdev->flags))
3154 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3155
3156 /* "Link key request" completed ahead of "connect request" completes */
3157 if (ev->encr_mode == 1 && !test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3158 ev->link_type == ACL_LINK) {
3159 struct link_key *key;
3160 struct hci_cp_read_enc_key_size cp;
3161
3162 key = hci_find_link_key(hdev, &ev->bdaddr);
3163 if (key) {
3164 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3165
3166 if (!read_key_size_capable(hdev)) {
3167 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3168 } else {
3169 cp.handle = cpu_to_le16(conn->handle);
3170 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3171 sizeof(cp), &cp)) {
3172 bt_dev_err(hdev, "sending read key size failed");
3173 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3174 }
3175 }
3176
3177 hci_encrypt_cfm(conn, ev->status);
3178 }
3179 }
3180
3181 /* Get remote features */
3182 if (conn->type == ACL_LINK) {
3183 struct hci_cp_read_remote_features cp;
3184 cp.handle = ev->handle;
3185 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
3186 sizeof(cp), &cp);
3187
3188 hci_update_scan(hdev);
3189 }
3190
3191 /* Set packet type for incoming connection */
3192 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
3193 struct hci_cp_change_conn_ptype cp;
3194 cp.handle = ev->handle;
3195 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3196 hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
3197 &cp);
3198 }
3199 }
3200
3201 if (conn->type == ACL_LINK)
3202 hci_sco_setup(conn, ev->status);
3203
3204 done:
3205 if (status) {
3206 hci_conn_failed(conn, status);
3207 } else if (ev->link_type == SCO_LINK) {
3208 switch (conn->setting & SCO_AIRMODE_MASK) {
3209 case SCO_AIRMODE_CVSD:
3210 if (hdev->notify)
3211 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
3212 break;
3213 }
3214
3215 hci_connect_cfm(conn, status);
3216 }
3217
3218 unlock:
3219 hci_dev_unlock(hdev);
3220 }
3221
hci_reject_conn(struct hci_dev * hdev,bdaddr_t * bdaddr)3222 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
3223 {
3224 struct hci_cp_reject_conn_req cp;
3225
3226 bacpy(&cp.bdaddr, bdaddr);
3227 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
3228 hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
3229 }
3230
hci_conn_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3231 static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
3232 struct sk_buff *skb)
3233 {
3234 struct hci_ev_conn_request *ev = data;
3235 int mask = hdev->link_mode;
3236 struct inquiry_entry *ie;
3237 struct hci_conn *conn;
3238 __u8 flags = 0;
3239
3240 bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type);
3241
3242 /* Reject incoming connection from device with same BD ADDR against
3243 * CVE-2020-26555
3244 */
3245 if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
3246 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
3247 &ev->bdaddr);
3248 hci_reject_conn(hdev, &ev->bdaddr);
3249 return;
3250 }
3251
3252 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
3253 &flags);
3254
3255 if (!(mask & HCI_LM_ACCEPT)) {
3256 hci_reject_conn(hdev, &ev->bdaddr);
3257 return;
3258 }
3259
3260 hci_dev_lock(hdev);
3261
3262 if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
3263 BDADDR_BREDR)) {
3264 hci_reject_conn(hdev, &ev->bdaddr);
3265 goto unlock;
3266 }
3267
3268 /* Require HCI_CONNECTABLE or an accept list entry to accept the
3269 * connection. These features are only touched through mgmt so
3270 * only do the checks if HCI_MGMT is set.
3271 */
3272 if (hci_dev_test_flag(hdev, HCI_MGMT) &&
3273 !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
3274 !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
3275 BDADDR_BREDR)) {
3276 hci_reject_conn(hdev, &ev->bdaddr);
3277 goto unlock;
3278 }
3279
3280 /* Connection accepted */
3281
3282 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3283 if (ie)
3284 memcpy(ie->data.dev_class, ev->dev_class, 3);
3285
3286 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
3287 &ev->bdaddr);
3288 if (!conn) {
3289 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr,
3290 HCI_ROLE_SLAVE);
3291 if (IS_ERR(conn)) {
3292 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3293 goto unlock;
3294 }
3295 }
3296
3297 memcpy(conn->dev_class, ev->dev_class, 3);
3298
3299 hci_dev_unlock(hdev);
3300
3301 if (ev->link_type == ACL_LINK ||
3302 (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
3303 struct hci_cp_accept_conn_req cp;
3304 conn->state = BT_CONNECT;
3305
3306 bacpy(&cp.bdaddr, &ev->bdaddr);
3307
3308 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
3309 cp.role = 0x00; /* Become central */
3310 else
3311 cp.role = 0x01; /* Remain peripheral */
3312
3313 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
3314 } else if (!(flags & HCI_PROTO_DEFER)) {
3315 struct hci_cp_accept_sync_conn_req cp;
3316 conn->state = BT_CONNECT;
3317
3318 bacpy(&cp.bdaddr, &ev->bdaddr);
3319 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3320
3321 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
3322 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
3323 cp.max_latency = cpu_to_le16(0xffff);
3324 cp.content_format = cpu_to_le16(hdev->voice_setting);
3325 cp.retrans_effort = 0xff;
3326
3327 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
3328 &cp);
3329 } else {
3330 conn->state = BT_CONNECT2;
3331 hci_connect_cfm(conn, 0);
3332 }
3333
3334 return;
3335 unlock:
3336 hci_dev_unlock(hdev);
3337 }
3338
hci_to_mgmt_reason(u8 err)3339 static u8 hci_to_mgmt_reason(u8 err)
3340 {
3341 switch (err) {
3342 case HCI_ERROR_CONNECTION_TIMEOUT:
3343 return MGMT_DEV_DISCONN_TIMEOUT;
3344 case HCI_ERROR_REMOTE_USER_TERM:
3345 case HCI_ERROR_REMOTE_LOW_RESOURCES:
3346 case HCI_ERROR_REMOTE_POWER_OFF:
3347 return MGMT_DEV_DISCONN_REMOTE;
3348 case HCI_ERROR_LOCAL_HOST_TERM:
3349 return MGMT_DEV_DISCONN_LOCAL_HOST;
3350 default:
3351 return MGMT_DEV_DISCONN_UNKNOWN;
3352 }
3353 }
3354
hci_disconn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3355 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
3356 struct sk_buff *skb)
3357 {
3358 struct hci_ev_disconn_complete *ev = data;
3359 u8 reason;
3360 struct hci_conn_params *params;
3361 struct hci_conn *conn;
3362 bool mgmt_connected;
3363
3364 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3365
3366 hci_dev_lock(hdev);
3367
3368 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3369 if (!conn)
3370 goto unlock;
3371
3372 if (ev->status) {
3373 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
3374 conn->dst_type, ev->status);
3375 goto unlock;
3376 }
3377
3378 conn->state = BT_CLOSED;
3379
3380 mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
3381
3382 if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
3383 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
3384 else
3385 reason = hci_to_mgmt_reason(ev->reason);
3386
3387 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
3388 reason, mgmt_connected);
3389
3390 if (conn->type == ACL_LINK) {
3391 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
3392 hci_remove_link_key(hdev, &conn->dst);
3393
3394 hci_update_scan(hdev);
3395 }
3396
3397 /* Re-enable passive scanning if disconnected device is marked
3398 * as auto-connectable.
3399 */
3400 if (conn->type == LE_LINK) {
3401 params = hci_conn_params_lookup(hdev, &conn->dst,
3402 conn->dst_type);
3403 if (params) {
3404 switch (params->auto_connect) {
3405 case HCI_AUTO_CONN_LINK_LOSS:
3406 if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
3407 break;
3408 fallthrough;
3409
3410 case HCI_AUTO_CONN_DIRECT:
3411 case HCI_AUTO_CONN_ALWAYS:
3412 hci_pend_le_list_del_init(params);
3413 hci_pend_le_list_add(params,
3414 &hdev->pend_le_conns);
3415 hci_update_passive_scan(hdev);
3416 break;
3417
3418 default:
3419 break;
3420 }
3421 }
3422 }
3423
3424 hci_disconn_cfm(conn, ev->reason);
3425
3426 /* Re-enable advertising if necessary, since it might
3427 * have been disabled by the connection. From the
3428 * HCI_LE_Set_Advertise_Enable command description in
3429 * the core specification (v4.0):
3430 * "The Controller shall continue advertising until the Host
3431 * issues an LE_Set_Advertise_Enable command with
3432 * Advertising_Enable set to 0x00 (Advertising is disabled)
3433 * or until a connection is created or until the Advertising
3434 * is timed out due to Directed Advertising."
3435 */
3436 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
3437 hdev->cur_adv_instance = conn->adv_instance;
3438 hci_enable_advertising(hdev);
3439 }
3440
3441 hci_conn_del(conn);
3442
3443 unlock:
3444 hci_dev_unlock(hdev);
3445 }
3446
hci_auth_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3447 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data,
3448 struct sk_buff *skb)
3449 {
3450 struct hci_ev_auth_complete *ev = data;
3451 struct hci_conn *conn;
3452
3453 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3454
3455 hci_dev_lock(hdev);
3456
3457 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3458 if (!conn)
3459 goto unlock;
3460
3461 if (!ev->status) {
3462 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3463 set_bit(HCI_CONN_AUTH, &conn->flags);
3464 conn->sec_level = conn->pending_sec_level;
3465 } else {
3466 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3467 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3468
3469 mgmt_auth_failed(conn, ev->status);
3470 }
3471
3472 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3473
3474 if (conn->state == BT_CONFIG) {
3475 if (!ev->status && hci_conn_ssp_enabled(conn)) {
3476 struct hci_cp_set_conn_encrypt cp;
3477 cp.handle = ev->handle;
3478 cp.encrypt = 0x01;
3479 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3480 &cp);
3481 } else {
3482 conn->state = BT_CONNECTED;
3483 hci_connect_cfm(conn, ev->status);
3484 hci_conn_drop(conn);
3485 }
3486 } else {
3487 hci_auth_cfm(conn, ev->status);
3488
3489 hci_conn_hold(conn);
3490 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3491 hci_conn_drop(conn);
3492 }
3493
3494 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
3495 if (!ev->status) {
3496 struct hci_cp_set_conn_encrypt cp;
3497 cp.handle = ev->handle;
3498 cp.encrypt = 0x01;
3499 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3500 &cp);
3501 } else {
3502 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3503 hci_encrypt_cfm(conn, ev->status);
3504 }
3505 }
3506
3507 unlock:
3508 hci_dev_unlock(hdev);
3509 }
3510
hci_remote_name_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3511 static void hci_remote_name_evt(struct hci_dev *hdev, void *data,
3512 struct sk_buff *skb)
3513 {
3514 struct hci_ev_remote_name *ev = data;
3515 struct hci_conn *conn;
3516
3517 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3518
3519 hci_dev_lock(hdev);
3520
3521 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3522
3523 if (!hci_dev_test_flag(hdev, HCI_MGMT))
3524 goto check_auth;
3525
3526 if (ev->status == 0)
3527 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
3528 strnlen(ev->name, HCI_MAX_NAME_LENGTH));
3529 else
3530 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
3531
3532 check_auth:
3533 if (!conn)
3534 goto unlock;
3535
3536 if (!hci_outgoing_auth_needed(hdev, conn))
3537 goto unlock;
3538
3539 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
3540 struct hci_cp_auth_requested cp;
3541
3542 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
3543
3544 cp.handle = __cpu_to_le16(conn->handle);
3545 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
3546 }
3547
3548 unlock:
3549 hci_dev_unlock(hdev);
3550 }
3551
hci_encrypt_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3552 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data,
3553 struct sk_buff *skb)
3554 {
3555 struct hci_ev_encrypt_change *ev = data;
3556 struct hci_conn *conn;
3557
3558 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3559
3560 hci_dev_lock(hdev);
3561
3562 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3563 if (!conn)
3564 goto unlock;
3565
3566 if (!ev->status) {
3567 if (ev->encrypt) {
3568 /* Encryption implies authentication */
3569 set_bit(HCI_CONN_AUTH, &conn->flags);
3570 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3571 conn->sec_level = conn->pending_sec_level;
3572
3573 /* P-256 authentication key implies FIPS */
3574 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
3575 set_bit(HCI_CONN_FIPS, &conn->flags);
3576
3577 if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
3578 conn->type == LE_LINK)
3579 set_bit(HCI_CONN_AES_CCM, &conn->flags);
3580 } else {
3581 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
3582 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
3583 }
3584 }
3585
3586 /* We should disregard the current RPA and generate a new one
3587 * whenever the encryption procedure fails.
3588 */
3589 if (ev->status && conn->type == LE_LINK) {
3590 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
3591 hci_adv_instances_set_rpa_expired(hdev, true);
3592 }
3593
3594 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3595
3596 /* Check link security requirements are met */
3597 if (!hci_conn_check_link_mode(conn))
3598 ev->status = HCI_ERROR_AUTH_FAILURE;
3599
3600 if (ev->status && conn->state == BT_CONNECTED) {
3601 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3602 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3603
3604 /* Notify upper layers so they can cleanup before
3605 * disconnecting.
3606 */
3607 hci_encrypt_cfm(conn, ev->status);
3608 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
3609 hci_conn_drop(conn);
3610 goto unlock;
3611 }
3612
3613 /* Try reading the encryption key size for encrypted ACL links */
3614 if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
3615 struct hci_cp_read_enc_key_size cp;
3616
3617 /* Only send HCI_Read_Encryption_Key_Size if the
3618 * controller really supports it. If it doesn't, assume
3619 * the default size (16).
3620 */
3621 if (!read_key_size_capable(hdev)) {
3622 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3623 goto notify;
3624 }
3625
3626 cp.handle = cpu_to_le16(conn->handle);
3627 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3628 sizeof(cp), &cp)) {
3629 bt_dev_err(hdev, "sending read key size failed");
3630 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3631 goto notify;
3632 }
3633
3634 goto unlock;
3635 }
3636
3637 /* We skip the WRITE_AUTH_PAYLOAD_TIMEOUT for ATS2851 based controllers
3638 * to avoid unexpected SMP command errors when pairing.
3639 */
3640 if (test_bit(HCI_QUIRK_BROKEN_WRITE_AUTH_PAYLOAD_TIMEOUT,
3641 &hdev->quirks))
3642 goto notify;
3643
3644 /* Set the default Authenticated Payload Timeout after
3645 * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
3646 * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
3647 * sent when the link is active and Encryption is enabled, the conn
3648 * type can be either LE or ACL and controller must support LMP Ping.
3649 * Ensure for AES-CCM encryption as well.
3650 */
3651 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3652 test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
3653 ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
3654 (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
3655 struct hci_cp_write_auth_payload_to cp;
3656
3657 cp.handle = cpu_to_le16(conn->handle);
3658 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
3659 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
3660 sizeof(cp), &cp))
3661 bt_dev_err(hdev, "write auth payload timeout failed");
3662 }
3663
3664 notify:
3665 hci_encrypt_cfm(conn, ev->status);
3666
3667 unlock:
3668 hci_dev_unlock(hdev);
3669 }
3670
hci_change_link_key_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3671 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data,
3672 struct sk_buff *skb)
3673 {
3674 struct hci_ev_change_link_key_complete *ev = data;
3675 struct hci_conn *conn;
3676
3677 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3678
3679 hci_dev_lock(hdev);
3680
3681 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3682 if (conn) {
3683 if (!ev->status)
3684 set_bit(HCI_CONN_SECURE, &conn->flags);
3685
3686 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3687
3688 hci_key_change_cfm(conn, ev->status);
3689 }
3690
3691 hci_dev_unlock(hdev);
3692 }
3693
hci_remote_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3694 static void hci_remote_features_evt(struct hci_dev *hdev, void *data,
3695 struct sk_buff *skb)
3696 {
3697 struct hci_ev_remote_features *ev = data;
3698 struct hci_conn *conn;
3699
3700 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3701
3702 hci_dev_lock(hdev);
3703
3704 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3705 if (!conn)
3706 goto unlock;
3707
3708 if (!ev->status)
3709 memcpy(conn->features[0], ev->features, 8);
3710
3711 if (conn->state != BT_CONFIG)
3712 goto unlock;
3713
3714 if (!ev->status && lmp_ext_feat_capable(hdev) &&
3715 lmp_ext_feat_capable(conn)) {
3716 struct hci_cp_read_remote_ext_features cp;
3717 cp.handle = ev->handle;
3718 cp.page = 0x01;
3719 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
3720 sizeof(cp), &cp);
3721 goto unlock;
3722 }
3723
3724 if (!ev->status) {
3725 struct hci_cp_remote_name_req cp;
3726 memset(&cp, 0, sizeof(cp));
3727 bacpy(&cp.bdaddr, &conn->dst);
3728 cp.pscan_rep_mode = 0x02;
3729 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
3730 } else {
3731 mgmt_device_connected(hdev, conn, NULL, 0);
3732 }
3733
3734 if (!hci_outgoing_auth_needed(hdev, conn)) {
3735 conn->state = BT_CONNECTED;
3736 hci_connect_cfm(conn, ev->status);
3737 hci_conn_drop(conn);
3738 }
3739
3740 unlock:
3741 hci_dev_unlock(hdev);
3742 }
3743
handle_cmd_cnt_and_timer(struct hci_dev * hdev,u8 ncmd)3744 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd)
3745 {
3746 cancel_delayed_work(&hdev->cmd_timer);
3747
3748 rcu_read_lock();
3749 if (!test_bit(HCI_RESET, &hdev->flags)) {
3750 if (ncmd) {
3751 cancel_delayed_work(&hdev->ncmd_timer);
3752 atomic_set(&hdev->cmd_cnt, 1);
3753 } else {
3754 if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
3755 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer,
3756 HCI_NCMD_TIMEOUT);
3757 }
3758 }
3759 rcu_read_unlock();
3760 }
3761
hci_cc_le_read_buffer_size_v2(struct hci_dev * hdev,void * data,struct sk_buff * skb)3762 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data,
3763 struct sk_buff *skb)
3764 {
3765 struct hci_rp_le_read_buffer_size_v2 *rp = data;
3766
3767 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3768
3769 if (rp->status)
3770 return rp->status;
3771
3772 hdev->le_mtu = __le16_to_cpu(rp->acl_mtu);
3773 hdev->le_pkts = rp->acl_max_pkt;
3774 hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu);
3775 hdev->iso_pkts = rp->iso_max_pkt;
3776
3777 hdev->le_cnt = hdev->le_pkts;
3778 hdev->iso_cnt = hdev->iso_pkts;
3779
3780 BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
3781 hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
3782
3783 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
3784 return HCI_ERROR_INVALID_PARAMETERS;
3785
3786 return rp->status;
3787 }
3788
hci_unbound_cis_failed(struct hci_dev * hdev,u8 cig,u8 status)3789 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status)
3790 {
3791 struct hci_conn *conn, *tmp;
3792
3793 lockdep_assert_held(&hdev->lock);
3794
3795 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
3796 if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY) ||
3797 conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig)
3798 continue;
3799
3800 if (HCI_CONN_HANDLE_UNSET(conn->handle))
3801 hci_conn_failed(conn, status);
3802 }
3803 }
3804
hci_cc_le_set_cig_params(struct hci_dev * hdev,void * data,struct sk_buff * skb)3805 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
3806 struct sk_buff *skb)
3807 {
3808 struct hci_rp_le_set_cig_params *rp = data;
3809 struct hci_cp_le_set_cig_params *cp;
3810 struct hci_conn *conn;
3811 u8 status = rp->status;
3812 bool pending = false;
3813 int i;
3814
3815 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3816
3817 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
3818 if (!rp->status && (!cp || rp->num_handles != cp->num_cis ||
3819 rp->cig_id != cp->cig_id)) {
3820 bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
3821 status = HCI_ERROR_UNSPECIFIED;
3822 }
3823
3824 hci_dev_lock(hdev);
3825
3826 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554
3827 *
3828 * If the Status return parameter is non-zero, then the state of the CIG
3829 * and its CIS configurations shall not be changed by the command. If
3830 * the CIG did not already exist, it shall not be created.
3831 */
3832 if (status) {
3833 /* Keep current configuration, fail only the unbound CIS */
3834 hci_unbound_cis_failed(hdev, rp->cig_id, status);
3835 goto unlock;
3836 }
3837
3838 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
3839 *
3840 * If the Status return parameter is zero, then the Controller shall
3841 * set the Connection_Handle arrayed return parameter to the connection
3842 * handle(s) corresponding to the CIS configurations specified in
3843 * the CIS_IDs command parameter, in the same order.
3844 */
3845 for (i = 0; i < rp->num_handles; ++i) {
3846 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
3847 cp->cis[i].cis_id);
3848 if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
3849 continue;
3850
3851 if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
3852 continue;
3853
3854 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i])))
3855 continue;
3856
3857 if (conn->state == BT_CONNECT)
3858 pending = true;
3859 }
3860
3861 unlock:
3862 if (pending)
3863 hci_le_create_cis_pending(hdev);
3864
3865 hci_dev_unlock(hdev);
3866
3867 return rp->status;
3868 }
3869
hci_cc_le_setup_iso_path(struct hci_dev * hdev,void * data,struct sk_buff * skb)3870 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data,
3871 struct sk_buff *skb)
3872 {
3873 struct hci_rp_le_setup_iso_path *rp = data;
3874 struct hci_cp_le_setup_iso_path *cp;
3875 struct hci_conn *conn;
3876
3877 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3878
3879 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH);
3880 if (!cp)
3881 return rp->status;
3882
3883 hci_dev_lock(hdev);
3884
3885 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
3886 if (!conn)
3887 goto unlock;
3888
3889 if (rp->status) {
3890 hci_connect_cfm(conn, rp->status);
3891 hci_conn_del(conn);
3892 goto unlock;
3893 }
3894
3895 switch (cp->direction) {
3896 /* Input (Host to Controller) */
3897 case 0x00:
3898 /* Only confirm connection if output only */
3899 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu)
3900 hci_connect_cfm(conn, rp->status);
3901 break;
3902 /* Output (Controller to Host) */
3903 case 0x01:
3904 /* Confirm connection since conn->iso_qos is always configured
3905 * last.
3906 */
3907 hci_connect_cfm(conn, rp->status);
3908
3909 /* Notify device connected in case it is a BIG Sync */
3910 if (!rp->status && test_bit(HCI_CONN_BIG_SYNC, &conn->flags))
3911 mgmt_device_connected(hdev, conn, NULL, 0);
3912
3913 break;
3914 }
3915
3916 unlock:
3917 hci_dev_unlock(hdev);
3918 return rp->status;
3919 }
3920
hci_cs_le_create_big(struct hci_dev * hdev,u8 status)3921 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status)
3922 {
3923 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3924 }
3925
hci_cc_set_per_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)3926 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data,
3927 struct sk_buff *skb)
3928 {
3929 struct hci_ev_status *rp = data;
3930 struct hci_cp_le_set_per_adv_params *cp;
3931
3932 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3933
3934 if (rp->status)
3935 return rp->status;
3936
3937 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS);
3938 if (!cp)
3939 return rp->status;
3940
3941 /* TODO: set the conn state */
3942 return rp->status;
3943 }
3944
hci_cc_le_set_per_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)3945 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data,
3946 struct sk_buff *skb)
3947 {
3948 struct hci_ev_status *rp = data;
3949 struct hci_cp_le_set_per_adv_enable *cp;
3950 struct adv_info *adv = NULL, *n;
3951 u8 per_adv_cnt = 0;
3952
3953 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3954
3955 if (rp->status)
3956 return rp->status;
3957
3958 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE);
3959 if (!cp)
3960 return rp->status;
3961
3962 hci_dev_lock(hdev);
3963
3964 adv = hci_find_adv_instance(hdev, cp->handle);
3965
3966 if (cp->enable) {
3967 hci_dev_set_flag(hdev, HCI_LE_PER_ADV);
3968
3969 if (adv)
3970 adv->enabled = true;
3971 } else {
3972 /* If just one instance was disabled check if there are
3973 * any other instance enabled before clearing HCI_LE_PER_ADV.
3974 * The current periodic adv instance will be marked as
3975 * disabled once extended advertising is also disabled.
3976 */
3977 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
3978 list) {
3979 if (adv->periodic && adv->enabled)
3980 per_adv_cnt++;
3981 }
3982
3983 if (per_adv_cnt > 1)
3984 goto unlock;
3985
3986 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV);
3987 }
3988
3989 unlock:
3990 hci_dev_unlock(hdev);
3991
3992 return rp->status;
3993 }
3994
3995 #define HCI_CC_VL(_op, _func, _min, _max) \
3996 { \
3997 .op = _op, \
3998 .func = _func, \
3999 .min_len = _min, \
4000 .max_len = _max, \
4001 }
4002
4003 #define HCI_CC(_op, _func, _len) \
4004 HCI_CC_VL(_op, _func, _len, _len)
4005
4006 #define HCI_CC_STATUS(_op, _func) \
4007 HCI_CC(_op, _func, sizeof(struct hci_ev_status))
4008
4009 static const struct hci_cc {
4010 u16 op;
4011 u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
4012 u16 min_len;
4013 u16 max_len;
4014 } hci_cc_table[] = {
4015 HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel),
4016 HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq),
4017 HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq),
4018 HCI_CC_STATUS(HCI_OP_REMOTE_NAME_REQ_CANCEL,
4019 hci_cc_remote_name_req_cancel),
4020 HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery,
4021 sizeof(struct hci_rp_role_discovery)),
4022 HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy,
4023 sizeof(struct hci_rp_read_link_policy)),
4024 HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy,
4025 sizeof(struct hci_rp_write_link_policy)),
4026 HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy,
4027 sizeof(struct hci_rp_read_def_link_policy)),
4028 HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY,
4029 hci_cc_write_def_link_policy),
4030 HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset),
4031 HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key,
4032 sizeof(struct hci_rp_read_stored_link_key)),
4033 HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key,
4034 sizeof(struct hci_rp_delete_stored_link_key)),
4035 HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name),
4036 HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name,
4037 sizeof(struct hci_rp_read_local_name)),
4038 HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable),
4039 HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
4040 HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable),
4041 HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter),
4042 HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev,
4043 sizeof(struct hci_rp_read_class_of_dev)),
4044 HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev),
4045 HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting,
4046 sizeof(struct hci_rp_read_voice_setting)),
4047 HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting),
4048 HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac,
4049 sizeof(struct hci_rp_read_num_supported_iac)),
4050 HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode),
4051 HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support),
4052 HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout,
4053 sizeof(struct hci_rp_read_auth_payload_to)),
4054 HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout,
4055 sizeof(struct hci_rp_write_auth_payload_to)),
4056 HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version,
4057 sizeof(struct hci_rp_read_local_version)),
4058 HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands,
4059 sizeof(struct hci_rp_read_local_commands)),
4060 HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features,
4061 sizeof(struct hci_rp_read_local_features)),
4062 HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features,
4063 sizeof(struct hci_rp_read_local_ext_features)),
4064 HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size,
4065 sizeof(struct hci_rp_read_buffer_size)),
4066 HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr,
4067 sizeof(struct hci_rp_read_bd_addr)),
4068 HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts,
4069 sizeof(struct hci_rp_read_local_pairing_opts)),
4070 HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity,
4071 sizeof(struct hci_rp_read_page_scan_activity)),
4072 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
4073 hci_cc_write_page_scan_activity),
4074 HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type,
4075 sizeof(struct hci_rp_read_page_scan_type)),
4076 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type),
4077 HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock,
4078 sizeof(struct hci_rp_read_clock)),
4079 HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size,
4080 sizeof(struct hci_rp_read_enc_key_size)),
4081 HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power,
4082 sizeof(struct hci_rp_read_inq_rsp_tx_power)),
4083 HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4084 hci_cc_read_def_err_data_reporting,
4085 sizeof(struct hci_rp_read_def_err_data_reporting)),
4086 HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4087 hci_cc_write_def_err_data_reporting),
4088 HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply,
4089 sizeof(struct hci_rp_pin_code_reply)),
4090 HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply,
4091 sizeof(struct hci_rp_pin_code_neg_reply)),
4092 HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data,
4093 sizeof(struct hci_rp_read_local_oob_data)),
4094 HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data,
4095 sizeof(struct hci_rp_read_local_oob_ext_data)),
4096 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size,
4097 sizeof(struct hci_rp_le_read_buffer_size)),
4098 HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features,
4099 sizeof(struct hci_rp_le_read_local_features)),
4100 HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power,
4101 sizeof(struct hci_rp_le_read_adv_tx_power)),
4102 HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply,
4103 sizeof(struct hci_rp_user_confirm_reply)),
4104 HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply,
4105 sizeof(struct hci_rp_user_confirm_reply)),
4106 HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply,
4107 sizeof(struct hci_rp_user_confirm_reply)),
4108 HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply,
4109 sizeof(struct hci_rp_user_confirm_reply)),
4110 HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr),
4111 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable),
4112 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param),
4113 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable),
4114 HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4115 hci_cc_le_read_accept_list_size,
4116 sizeof(struct hci_rp_le_read_accept_list_size)),
4117 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list),
4118 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST,
4119 hci_cc_le_add_to_accept_list),
4120 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
4121 hci_cc_le_del_from_accept_list),
4122 HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states,
4123 sizeof(struct hci_rp_le_read_supported_states)),
4124 HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len,
4125 sizeof(struct hci_rp_le_read_def_data_len)),
4126 HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN,
4127 hci_cc_le_write_def_data_len),
4128 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST,
4129 hci_cc_le_add_to_resolv_list),
4130 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST,
4131 hci_cc_le_del_from_resolv_list),
4132 HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST,
4133 hci_cc_le_clear_resolv_list),
4134 HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size,
4135 sizeof(struct hci_rp_le_read_resolv_list_size)),
4136 HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
4137 hci_cc_le_set_addr_resolution_enable),
4138 HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len,
4139 sizeof(struct hci_rp_le_read_max_data_len)),
4140 HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED,
4141 hci_cc_write_le_host_supported),
4142 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param),
4143 HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi,
4144 sizeof(struct hci_rp_read_rssi)),
4145 HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power,
4146 sizeof(struct hci_rp_read_tx_power)),
4147 HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode),
4148 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS,
4149 hci_cc_le_set_ext_scan_param),
4150 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE,
4151 hci_cc_le_set_ext_scan_enable),
4152 HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy),
4153 HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4154 hci_cc_le_read_num_adv_sets,
4155 sizeof(struct hci_rp_le_read_num_supported_adv_sets)),
4156 HCI_CC(HCI_OP_LE_SET_EXT_ADV_PARAMS, hci_cc_set_ext_adv_param,
4157 sizeof(struct hci_rp_le_set_ext_adv_params)),
4158 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE,
4159 hci_cc_le_set_ext_adv_enable),
4160 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
4161 hci_cc_le_set_adv_set_random_addr),
4162 HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set),
4163 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets),
4164 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param),
4165 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE,
4166 hci_cc_le_set_per_adv_enable),
4167 HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power,
4168 sizeof(struct hci_rp_le_read_transmit_power)),
4169 HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode),
4170 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2,
4171 sizeof(struct hci_rp_le_read_buffer_size_v2)),
4172 HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params,
4173 sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE),
4174 HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path,
4175 sizeof(struct hci_rp_le_setup_iso_path)),
4176 };
4177
hci_cc_func(struct hci_dev * hdev,const struct hci_cc * cc,struct sk_buff * skb)4178 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc,
4179 struct sk_buff *skb)
4180 {
4181 void *data;
4182
4183 if (skb->len < cc->min_len) {
4184 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u",
4185 cc->op, skb->len, cc->min_len);
4186 return HCI_ERROR_UNSPECIFIED;
4187 }
4188
4189 /* Just warn if the length is over max_len size it still be possible to
4190 * partially parse the cc so leave to callback to decide if that is
4191 * acceptable.
4192 */
4193 if (skb->len > cc->max_len)
4194 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u",
4195 cc->op, skb->len, cc->max_len);
4196
4197 data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len);
4198 if (!data)
4199 return HCI_ERROR_UNSPECIFIED;
4200
4201 return cc->func(hdev, data, skb);
4202 }
4203
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)4204 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
4205 struct sk_buff *skb, u16 *opcode, u8 *status,
4206 hci_req_complete_t *req_complete,
4207 hci_req_complete_skb_t *req_complete_skb)
4208 {
4209 struct hci_ev_cmd_complete *ev = data;
4210 int i;
4211
4212 *opcode = __le16_to_cpu(ev->opcode);
4213
4214 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4215
4216 for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) {
4217 if (hci_cc_table[i].op == *opcode) {
4218 *status = hci_cc_func(hdev, &hci_cc_table[i], skb);
4219 break;
4220 }
4221 }
4222
4223 if (i == ARRAY_SIZE(hci_cc_table)) {
4224 /* Unknown opcode, assume byte 0 contains the status, so
4225 * that e.g. __hci_cmd_sync() properly returns errors
4226 * for vendor specific commands send by HCI drivers.
4227 * If a vendor doesn't actually follow this convention we may
4228 * need to introduce a vendor CC table in order to properly set
4229 * the status.
4230 */
4231 *status = skb->data[0];
4232 }
4233
4234 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4235
4236 hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
4237 req_complete_skb);
4238
4239 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4240 bt_dev_err(hdev,
4241 "unexpected event for opcode 0x%4.4x", *opcode);
4242 return;
4243 }
4244
4245 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4246 queue_work(hdev->workqueue, &hdev->cmd_work);
4247 }
4248
hci_cs_le_create_cis(struct hci_dev * hdev,u8 status)4249 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
4250 {
4251 struct hci_cp_le_create_cis *cp;
4252 bool pending = false;
4253 int i;
4254
4255 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4256
4257 if (!status)
4258 return;
4259
4260 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
4261 if (!cp)
4262 return;
4263
4264 hci_dev_lock(hdev);
4265
4266 /* Remove connection if command failed */
4267 for (i = 0; cp->num_cis; cp->num_cis--, i++) {
4268 struct hci_conn *conn;
4269 u16 handle;
4270
4271 handle = __le16_to_cpu(cp->cis[i].cis_handle);
4272
4273 conn = hci_conn_hash_lookup_handle(hdev, handle);
4274 if (conn) {
4275 if (test_and_clear_bit(HCI_CONN_CREATE_CIS,
4276 &conn->flags))
4277 pending = true;
4278 conn->state = BT_CLOSED;
4279 hci_connect_cfm(conn, status);
4280 hci_conn_del(conn);
4281 }
4282 }
4283
4284 if (pending)
4285 hci_le_create_cis_pending(hdev);
4286
4287 hci_dev_unlock(hdev);
4288 }
4289
4290 #define HCI_CS(_op, _func) \
4291 { \
4292 .op = _op, \
4293 .func = _func, \
4294 }
4295
4296 static const struct hci_cs {
4297 u16 op;
4298 void (*func)(struct hci_dev *hdev, __u8 status);
4299 } hci_cs_table[] = {
4300 HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry),
4301 HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn),
4302 HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect),
4303 HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco),
4304 HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested),
4305 HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt),
4306 HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req),
4307 HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features),
4308 HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES,
4309 hci_cs_read_remote_ext_features),
4310 HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn),
4311 HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN,
4312 hci_cs_enhanced_setup_sync_conn),
4313 HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode),
4314 HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode),
4315 HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role),
4316 HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn),
4317 HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features),
4318 HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc),
4319 HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn),
4320 HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis),
4321 HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big),
4322 };
4323
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)4324 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data,
4325 struct sk_buff *skb, u16 *opcode, u8 *status,
4326 hci_req_complete_t *req_complete,
4327 hci_req_complete_skb_t *req_complete_skb)
4328 {
4329 struct hci_ev_cmd_status *ev = data;
4330 int i;
4331
4332 *opcode = __le16_to_cpu(ev->opcode);
4333 *status = ev->status;
4334
4335 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4336
4337 for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) {
4338 if (hci_cs_table[i].op == *opcode) {
4339 hci_cs_table[i].func(hdev, ev->status);
4340 break;
4341 }
4342 }
4343
4344 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4345
4346 /* Indicate request completion if the command failed. Also, if
4347 * we're not waiting for a special event and we get a success
4348 * command status we should try to flag the request as completed
4349 * (since for this kind of commands there will not be a command
4350 * complete event).
4351 */
4352 if (ev->status || (hdev->req_skb && !hci_skb_event(hdev->req_skb))) {
4353 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
4354 req_complete_skb);
4355 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4356 bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x",
4357 *opcode);
4358 return;
4359 }
4360 }
4361
4362 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4363 queue_work(hdev->workqueue, &hdev->cmd_work);
4364 }
4365
hci_hardware_error_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4366 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data,
4367 struct sk_buff *skb)
4368 {
4369 struct hci_ev_hardware_error *ev = data;
4370
4371 bt_dev_dbg(hdev, "code 0x%2.2x", ev->code);
4372
4373 hdev->hw_error_code = ev->code;
4374
4375 queue_work(hdev->req_workqueue, &hdev->error_reset);
4376 }
4377
hci_role_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4378 static void hci_role_change_evt(struct hci_dev *hdev, void *data,
4379 struct sk_buff *skb)
4380 {
4381 struct hci_ev_role_change *ev = data;
4382 struct hci_conn *conn;
4383
4384 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4385
4386 hci_dev_lock(hdev);
4387
4388 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4389 if (conn) {
4390 if (!ev->status)
4391 conn->role = ev->role;
4392
4393 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
4394
4395 hci_role_switch_cfm(conn, ev->status, ev->role);
4396 }
4397
4398 hci_dev_unlock(hdev);
4399 }
4400
hci_num_comp_pkts_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4401 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data,
4402 struct sk_buff *skb)
4403 {
4404 struct hci_ev_num_comp_pkts *ev = data;
4405 int i;
4406
4407 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS,
4408 flex_array_size(ev, handles, ev->num)))
4409 return;
4410
4411 bt_dev_dbg(hdev, "num %d", ev->num);
4412
4413 for (i = 0; i < ev->num; i++) {
4414 struct hci_comp_pkts_info *info = &ev->handles[i];
4415 struct hci_conn *conn;
4416 __u16 handle, count;
4417
4418 handle = __le16_to_cpu(info->handle);
4419 count = __le16_to_cpu(info->count);
4420
4421 conn = hci_conn_hash_lookup_handle(hdev, handle);
4422 if (!conn)
4423 continue;
4424
4425 conn->sent -= count;
4426
4427 switch (conn->type) {
4428 case ACL_LINK:
4429 hdev->acl_cnt += count;
4430 if (hdev->acl_cnt > hdev->acl_pkts)
4431 hdev->acl_cnt = hdev->acl_pkts;
4432 break;
4433
4434 case LE_LINK:
4435 if (hdev->le_pkts) {
4436 hdev->le_cnt += count;
4437 if (hdev->le_cnt > hdev->le_pkts)
4438 hdev->le_cnt = hdev->le_pkts;
4439 } else {
4440 hdev->acl_cnt += count;
4441 if (hdev->acl_cnt > hdev->acl_pkts)
4442 hdev->acl_cnt = hdev->acl_pkts;
4443 }
4444 break;
4445
4446 case SCO_LINK:
4447 hdev->sco_cnt += count;
4448 if (hdev->sco_cnt > hdev->sco_pkts)
4449 hdev->sco_cnt = hdev->sco_pkts;
4450 break;
4451
4452 case ISO_LINK:
4453 if (hdev->iso_pkts) {
4454 hdev->iso_cnt += count;
4455 if (hdev->iso_cnt > hdev->iso_pkts)
4456 hdev->iso_cnt = hdev->iso_pkts;
4457 } else if (hdev->le_pkts) {
4458 hdev->le_cnt += count;
4459 if (hdev->le_cnt > hdev->le_pkts)
4460 hdev->le_cnt = hdev->le_pkts;
4461 } else {
4462 hdev->acl_cnt += count;
4463 if (hdev->acl_cnt > hdev->acl_pkts)
4464 hdev->acl_cnt = hdev->acl_pkts;
4465 }
4466 break;
4467
4468 default:
4469 bt_dev_err(hdev, "unknown type %d conn %p",
4470 conn->type, conn);
4471 break;
4472 }
4473 }
4474
4475 queue_work(hdev->workqueue, &hdev->tx_work);
4476 }
4477
hci_mode_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4478 static void hci_mode_change_evt(struct hci_dev *hdev, void *data,
4479 struct sk_buff *skb)
4480 {
4481 struct hci_ev_mode_change *ev = data;
4482 struct hci_conn *conn;
4483
4484 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4485
4486 hci_dev_lock(hdev);
4487
4488 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4489 if (conn) {
4490 conn->mode = ev->mode;
4491
4492 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
4493 &conn->flags)) {
4494 if (conn->mode == HCI_CM_ACTIVE)
4495 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4496 else
4497 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4498 }
4499
4500 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
4501 hci_sco_setup(conn, ev->status);
4502 }
4503
4504 hci_dev_unlock(hdev);
4505 }
4506
hci_pin_code_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4507 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data,
4508 struct sk_buff *skb)
4509 {
4510 struct hci_ev_pin_code_req *ev = data;
4511 struct hci_conn *conn;
4512
4513 bt_dev_dbg(hdev, "");
4514
4515 hci_dev_lock(hdev);
4516
4517 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4518 if (!conn)
4519 goto unlock;
4520
4521 if (conn->state == BT_CONNECTED) {
4522 hci_conn_hold(conn);
4523 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
4524 hci_conn_drop(conn);
4525 }
4526
4527 if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
4528 !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
4529 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
4530 sizeof(ev->bdaddr), &ev->bdaddr);
4531 } else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4532 u8 secure;
4533
4534 if (conn->pending_sec_level == BT_SECURITY_HIGH)
4535 secure = 1;
4536 else
4537 secure = 0;
4538
4539 mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
4540 }
4541
4542 unlock:
4543 hci_dev_unlock(hdev);
4544 }
4545
conn_set_key(struct hci_conn * conn,u8 key_type,u8 pin_len)4546 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
4547 {
4548 if (key_type == HCI_LK_CHANGED_COMBINATION)
4549 return;
4550
4551 conn->pin_length = pin_len;
4552 conn->key_type = key_type;
4553
4554 switch (key_type) {
4555 case HCI_LK_LOCAL_UNIT:
4556 case HCI_LK_REMOTE_UNIT:
4557 case HCI_LK_DEBUG_COMBINATION:
4558 return;
4559 case HCI_LK_COMBINATION:
4560 if (pin_len == 16)
4561 conn->pending_sec_level = BT_SECURITY_HIGH;
4562 else
4563 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4564 break;
4565 case HCI_LK_UNAUTH_COMBINATION_P192:
4566 case HCI_LK_UNAUTH_COMBINATION_P256:
4567 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4568 break;
4569 case HCI_LK_AUTH_COMBINATION_P192:
4570 conn->pending_sec_level = BT_SECURITY_HIGH;
4571 break;
4572 case HCI_LK_AUTH_COMBINATION_P256:
4573 conn->pending_sec_level = BT_SECURITY_FIPS;
4574 break;
4575 }
4576 }
4577
hci_link_key_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4578 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data,
4579 struct sk_buff *skb)
4580 {
4581 struct hci_ev_link_key_req *ev = data;
4582 struct hci_cp_link_key_reply cp;
4583 struct hci_conn *conn;
4584 struct link_key *key;
4585
4586 bt_dev_dbg(hdev, "");
4587
4588 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4589 return;
4590
4591 hci_dev_lock(hdev);
4592
4593 key = hci_find_link_key(hdev, &ev->bdaddr);
4594 if (!key) {
4595 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr);
4596 goto not_found;
4597 }
4598
4599 bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr);
4600
4601 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4602 if (conn) {
4603 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4604
4605 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
4606 key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
4607 conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
4608 bt_dev_dbg(hdev, "ignoring unauthenticated key");
4609 goto not_found;
4610 }
4611
4612 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
4613 (conn->pending_sec_level == BT_SECURITY_HIGH ||
4614 conn->pending_sec_level == BT_SECURITY_FIPS)) {
4615 bt_dev_dbg(hdev, "ignoring key unauthenticated for high security");
4616 goto not_found;
4617 }
4618
4619 conn_set_key(conn, key->type, key->pin_len);
4620 }
4621
4622 bacpy(&cp.bdaddr, &ev->bdaddr);
4623 memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
4624
4625 hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
4626
4627 hci_dev_unlock(hdev);
4628
4629 return;
4630
4631 not_found:
4632 hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
4633 hci_dev_unlock(hdev);
4634 }
4635
hci_link_key_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4636 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data,
4637 struct sk_buff *skb)
4638 {
4639 struct hci_ev_link_key_notify *ev = data;
4640 struct hci_conn *conn;
4641 struct link_key *key;
4642 bool persistent;
4643 u8 pin_len = 0;
4644
4645 bt_dev_dbg(hdev, "");
4646
4647 hci_dev_lock(hdev);
4648
4649 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4650 if (!conn)
4651 goto unlock;
4652
4653 /* Ignore NULL link key against CVE-2020-26555 */
4654 if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
4655 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
4656 &ev->bdaddr);
4657 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
4658 hci_conn_drop(conn);
4659 goto unlock;
4660 }
4661
4662 hci_conn_hold(conn);
4663 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
4664 hci_conn_drop(conn);
4665
4666 set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4667 conn_set_key(conn, ev->key_type, conn->pin_length);
4668
4669 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4670 goto unlock;
4671
4672 key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
4673 ev->key_type, pin_len, &persistent);
4674 if (!key)
4675 goto unlock;
4676
4677 /* Update connection information since adding the key will have
4678 * fixed up the type in the case of changed combination keys.
4679 */
4680 if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
4681 conn_set_key(conn, key->type, key->pin_len);
4682
4683 mgmt_new_link_key(hdev, key, persistent);
4684
4685 /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
4686 * is set. If it's not set simply remove the key from the kernel
4687 * list (we've still notified user space about it but with
4688 * store_hint being 0).
4689 */
4690 if (key->type == HCI_LK_DEBUG_COMBINATION &&
4691 !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
4692 list_del_rcu(&key->list);
4693 kfree_rcu(key, rcu);
4694 goto unlock;
4695 }
4696
4697 if (persistent)
4698 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4699 else
4700 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4701
4702 unlock:
4703 hci_dev_unlock(hdev);
4704 }
4705
hci_clock_offset_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4706 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data,
4707 struct sk_buff *skb)
4708 {
4709 struct hci_ev_clock_offset *ev = data;
4710 struct hci_conn *conn;
4711
4712 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4713
4714 hci_dev_lock(hdev);
4715
4716 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4717 if (conn && !ev->status) {
4718 struct inquiry_entry *ie;
4719
4720 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4721 if (ie) {
4722 ie->data.clock_offset = ev->clock_offset;
4723 ie->timestamp = jiffies;
4724 }
4725 }
4726
4727 hci_dev_unlock(hdev);
4728 }
4729
hci_pkt_type_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4730 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data,
4731 struct sk_buff *skb)
4732 {
4733 struct hci_ev_pkt_type_change *ev = data;
4734 struct hci_conn *conn;
4735
4736 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4737
4738 hci_dev_lock(hdev);
4739
4740 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4741 if (conn && !ev->status)
4742 conn->pkt_type = __le16_to_cpu(ev->pkt_type);
4743
4744 hci_dev_unlock(hdev);
4745 }
4746
hci_pscan_rep_mode_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4747 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data,
4748 struct sk_buff *skb)
4749 {
4750 struct hci_ev_pscan_rep_mode *ev = data;
4751 struct inquiry_entry *ie;
4752
4753 bt_dev_dbg(hdev, "");
4754
4755 hci_dev_lock(hdev);
4756
4757 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
4758 if (ie) {
4759 ie->data.pscan_rep_mode = ev->pscan_rep_mode;
4760 ie->timestamp = jiffies;
4761 }
4762
4763 hci_dev_unlock(hdev);
4764 }
4765
hci_inquiry_result_with_rssi_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)4766 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
4767 struct sk_buff *skb)
4768 {
4769 struct hci_ev_inquiry_result_rssi *ev = edata;
4770 struct inquiry_data data;
4771 int i;
4772
4773 bt_dev_dbg(hdev, "num_rsp %d", ev->num);
4774
4775 if (!ev->num)
4776 return;
4777
4778 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
4779 return;
4780
4781 hci_dev_lock(hdev);
4782
4783 if (skb->len == array_size(ev->num,
4784 sizeof(struct inquiry_info_rssi_pscan))) {
4785 struct inquiry_info_rssi_pscan *info;
4786
4787 for (i = 0; i < ev->num; i++) {
4788 u32 flags;
4789
4790 info = hci_ev_skb_pull(hdev, skb,
4791 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4792 sizeof(*info));
4793 if (!info) {
4794 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4795 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4796 goto unlock;
4797 }
4798
4799 bacpy(&data.bdaddr, &info->bdaddr);
4800 data.pscan_rep_mode = info->pscan_rep_mode;
4801 data.pscan_period_mode = info->pscan_period_mode;
4802 data.pscan_mode = info->pscan_mode;
4803 memcpy(data.dev_class, info->dev_class, 3);
4804 data.clock_offset = info->clock_offset;
4805 data.rssi = info->rssi;
4806 data.ssp_mode = 0x00;
4807
4808 flags = hci_inquiry_cache_update(hdev, &data, false);
4809
4810 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4811 info->dev_class, info->rssi,
4812 flags, NULL, 0, NULL, 0, 0);
4813 }
4814 } else if (skb->len == array_size(ev->num,
4815 sizeof(struct inquiry_info_rssi))) {
4816 struct inquiry_info_rssi *info;
4817
4818 for (i = 0; i < ev->num; i++) {
4819 u32 flags;
4820
4821 info = hci_ev_skb_pull(hdev, skb,
4822 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4823 sizeof(*info));
4824 if (!info) {
4825 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4826 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4827 goto unlock;
4828 }
4829
4830 bacpy(&data.bdaddr, &info->bdaddr);
4831 data.pscan_rep_mode = info->pscan_rep_mode;
4832 data.pscan_period_mode = info->pscan_period_mode;
4833 data.pscan_mode = 0x00;
4834 memcpy(data.dev_class, info->dev_class, 3);
4835 data.clock_offset = info->clock_offset;
4836 data.rssi = info->rssi;
4837 data.ssp_mode = 0x00;
4838
4839 flags = hci_inquiry_cache_update(hdev, &data, false);
4840
4841 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4842 info->dev_class, info->rssi,
4843 flags, NULL, 0, NULL, 0, 0);
4844 }
4845 } else {
4846 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4847 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4848 }
4849 unlock:
4850 hci_dev_unlock(hdev);
4851 }
4852
hci_remote_ext_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4853 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data,
4854 struct sk_buff *skb)
4855 {
4856 struct hci_ev_remote_ext_features *ev = data;
4857 struct hci_conn *conn;
4858
4859 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4860
4861 hci_dev_lock(hdev);
4862
4863 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4864 if (!conn)
4865 goto unlock;
4866
4867 if (ev->page < HCI_MAX_PAGES)
4868 memcpy(conn->features[ev->page], ev->features, 8);
4869
4870 if (!ev->status && ev->page == 0x01) {
4871 struct inquiry_entry *ie;
4872
4873 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4874 if (ie)
4875 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4876
4877 if (ev->features[0] & LMP_HOST_SSP) {
4878 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4879 } else {
4880 /* It is mandatory by the Bluetooth specification that
4881 * Extended Inquiry Results are only used when Secure
4882 * Simple Pairing is enabled, but some devices violate
4883 * this.
4884 *
4885 * To make these devices work, the internal SSP
4886 * enabled flag needs to be cleared if the remote host
4887 * features do not indicate SSP support */
4888 clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4889 }
4890
4891 if (ev->features[0] & LMP_HOST_SC)
4892 set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
4893 }
4894
4895 if (conn->state != BT_CONFIG)
4896 goto unlock;
4897
4898 if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
4899 struct hci_cp_remote_name_req cp;
4900 memset(&cp, 0, sizeof(cp));
4901 bacpy(&cp.bdaddr, &conn->dst);
4902 cp.pscan_rep_mode = 0x02;
4903 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
4904 } else {
4905 mgmt_device_connected(hdev, conn, NULL, 0);
4906 }
4907
4908 if (!hci_outgoing_auth_needed(hdev, conn)) {
4909 conn->state = BT_CONNECTED;
4910 hci_connect_cfm(conn, ev->status);
4911 hci_conn_drop(conn);
4912 }
4913
4914 unlock:
4915 hci_dev_unlock(hdev);
4916 }
4917
hci_sync_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4918 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
4919 struct sk_buff *skb)
4920 {
4921 struct hci_ev_sync_conn_complete *ev = data;
4922 struct hci_conn *conn;
4923 u8 status = ev->status;
4924
4925 switch (ev->link_type) {
4926 case SCO_LINK:
4927 case ESCO_LINK:
4928 break;
4929 default:
4930 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
4931 * for HCI_Synchronous_Connection_Complete is limited to
4932 * either SCO or eSCO
4933 */
4934 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
4935 return;
4936 }
4937
4938 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4939
4940 hci_dev_lock(hdev);
4941
4942 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
4943 if (!conn) {
4944 if (ev->link_type == ESCO_LINK)
4945 goto unlock;
4946
4947 /* When the link type in the event indicates SCO connection
4948 * and lookup of the connection object fails, then check
4949 * if an eSCO connection object exists.
4950 *
4951 * The core limits the synchronous connections to either
4952 * SCO or eSCO. The eSCO connection is preferred and tried
4953 * to be setup first and until successfully established,
4954 * the link type will be hinted as eSCO.
4955 */
4956 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
4957 if (!conn)
4958 goto unlock;
4959 }
4960
4961 /* The HCI_Synchronous_Connection_Complete event is only sent once per connection.
4962 * Processing it more than once per connection can corrupt kernel memory.
4963 *
4964 * As the connection handle is set here for the first time, it indicates
4965 * whether the connection is already set up.
4966 */
4967 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
4968 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection");
4969 goto unlock;
4970 }
4971
4972 switch (status) {
4973 case 0x00:
4974 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
4975 if (status) {
4976 conn->state = BT_CLOSED;
4977 break;
4978 }
4979
4980 conn->state = BT_CONNECTED;
4981 conn->type = ev->link_type;
4982
4983 hci_debugfs_create_conn(conn);
4984 hci_conn_add_sysfs(conn);
4985 break;
4986
4987 case 0x10: /* Connection Accept Timeout */
4988 case 0x0d: /* Connection Rejected due to Limited Resources */
4989 case 0x11: /* Unsupported Feature or Parameter Value */
4990 case 0x1c: /* SCO interval rejected */
4991 case 0x1a: /* Unsupported Remote Feature */
4992 case 0x1e: /* Invalid LMP Parameters */
4993 case 0x1f: /* Unspecified error */
4994 case 0x20: /* Unsupported LMP Parameter value */
4995 if (conn->out) {
4996 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
4997 (hdev->esco_type & EDR_ESCO_MASK);
4998 if (hci_setup_sync(conn, conn->parent->handle))
4999 goto unlock;
5000 }
5001 fallthrough;
5002
5003 default:
5004 conn->state = BT_CLOSED;
5005 break;
5006 }
5007
5008 bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode);
5009 /* Notify only in case of SCO over HCI transport data path which
5010 * is zero and non-zero value shall be non-HCI transport data path
5011 */
5012 if (conn->codec.data_path == 0 && hdev->notify) {
5013 switch (ev->air_mode) {
5014 case 0x02:
5015 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
5016 break;
5017 case 0x03:
5018 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP);
5019 break;
5020 }
5021 }
5022
5023 hci_connect_cfm(conn, status);
5024 if (status)
5025 hci_conn_del(conn);
5026
5027 unlock:
5028 hci_dev_unlock(hdev);
5029 }
5030
eir_get_length(u8 * eir,size_t eir_len)5031 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
5032 {
5033 size_t parsed = 0;
5034
5035 while (parsed < eir_len) {
5036 u8 field_len = eir[0];
5037
5038 if (field_len == 0)
5039 return parsed;
5040
5041 parsed += field_len + 1;
5042 eir += field_len + 1;
5043 }
5044
5045 return eir_len;
5046 }
5047
hci_extended_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5048 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata,
5049 struct sk_buff *skb)
5050 {
5051 struct hci_ev_ext_inquiry_result *ev = edata;
5052 struct inquiry_data data;
5053 size_t eir_len;
5054 int i;
5055
5056 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT,
5057 flex_array_size(ev, info, ev->num)))
5058 return;
5059
5060 bt_dev_dbg(hdev, "num %d", ev->num);
5061
5062 if (!ev->num)
5063 return;
5064
5065 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
5066 return;
5067
5068 hci_dev_lock(hdev);
5069
5070 for (i = 0; i < ev->num; i++) {
5071 struct extended_inquiry_info *info = &ev->info[i];
5072 u32 flags;
5073 bool name_known;
5074
5075 bacpy(&data.bdaddr, &info->bdaddr);
5076 data.pscan_rep_mode = info->pscan_rep_mode;
5077 data.pscan_period_mode = info->pscan_period_mode;
5078 data.pscan_mode = 0x00;
5079 memcpy(data.dev_class, info->dev_class, 3);
5080 data.clock_offset = info->clock_offset;
5081 data.rssi = info->rssi;
5082 data.ssp_mode = 0x01;
5083
5084 if (hci_dev_test_flag(hdev, HCI_MGMT))
5085 name_known = eir_get_data(info->data,
5086 sizeof(info->data),
5087 EIR_NAME_COMPLETE, NULL);
5088 else
5089 name_known = true;
5090
5091 flags = hci_inquiry_cache_update(hdev, &data, name_known);
5092
5093 eir_len = eir_get_length(info->data, sizeof(info->data));
5094
5095 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
5096 info->dev_class, info->rssi,
5097 flags, info->data, eir_len, NULL, 0, 0);
5098 }
5099
5100 hci_dev_unlock(hdev);
5101 }
5102
hci_key_refresh_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5103 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data,
5104 struct sk_buff *skb)
5105 {
5106 struct hci_ev_key_refresh_complete *ev = data;
5107 struct hci_conn *conn;
5108
5109 bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status,
5110 __le16_to_cpu(ev->handle));
5111
5112 hci_dev_lock(hdev);
5113
5114 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5115 if (!conn)
5116 goto unlock;
5117
5118 /* For BR/EDR the necessary steps are taken through the
5119 * auth_complete event.
5120 */
5121 if (conn->type != LE_LINK)
5122 goto unlock;
5123
5124 if (!ev->status)
5125 conn->sec_level = conn->pending_sec_level;
5126
5127 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
5128
5129 if (ev->status && conn->state == BT_CONNECTED) {
5130 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
5131 hci_conn_drop(conn);
5132 goto unlock;
5133 }
5134
5135 if (conn->state == BT_CONFIG) {
5136 if (!ev->status)
5137 conn->state = BT_CONNECTED;
5138
5139 hci_connect_cfm(conn, ev->status);
5140 hci_conn_drop(conn);
5141 } else {
5142 hci_auth_cfm(conn, ev->status);
5143
5144 hci_conn_hold(conn);
5145 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
5146 hci_conn_drop(conn);
5147 }
5148
5149 unlock:
5150 hci_dev_unlock(hdev);
5151 }
5152
hci_get_auth_req(struct hci_conn * conn)5153 static u8 hci_get_auth_req(struct hci_conn *conn)
5154 {
5155 /* If remote requests no-bonding follow that lead */
5156 if (conn->remote_auth == HCI_AT_NO_BONDING ||
5157 conn->remote_auth == HCI_AT_NO_BONDING_MITM)
5158 return conn->remote_auth | (conn->auth_type & 0x01);
5159
5160 /* If both remote and local have enough IO capabilities, require
5161 * MITM protection
5162 */
5163 if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
5164 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
5165 return conn->remote_auth | 0x01;
5166
5167 /* No MITM protection possible so ignore remote requirement */
5168 return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
5169 }
5170
bredr_oob_data_present(struct hci_conn * conn)5171 static u8 bredr_oob_data_present(struct hci_conn *conn)
5172 {
5173 struct hci_dev *hdev = conn->hdev;
5174 struct oob_data *data;
5175
5176 data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
5177 if (!data)
5178 return 0x00;
5179
5180 if (bredr_sc_enabled(hdev)) {
5181 /* When Secure Connections is enabled, then just
5182 * return the present value stored with the OOB
5183 * data. The stored value contains the right present
5184 * information. However it can only be trusted when
5185 * not in Secure Connection Only mode.
5186 */
5187 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
5188 return data->present;
5189
5190 /* When Secure Connections Only mode is enabled, then
5191 * the P-256 values are required. If they are not
5192 * available, then do not declare that OOB data is
5193 * present.
5194 */
5195 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
5196 !crypto_memneq(data->hash256, ZERO_KEY, 16))
5197 return 0x00;
5198
5199 return 0x02;
5200 }
5201
5202 /* When Secure Connections is not enabled or actually
5203 * not supported by the hardware, then check that if
5204 * P-192 data values are present.
5205 */
5206 if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
5207 !crypto_memneq(data->hash192, ZERO_KEY, 16))
5208 return 0x00;
5209
5210 return 0x01;
5211 }
5212
hci_io_capa_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5213 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data,
5214 struct sk_buff *skb)
5215 {
5216 struct hci_ev_io_capa_request *ev = data;
5217 struct hci_conn *conn;
5218
5219 bt_dev_dbg(hdev, "");
5220
5221 hci_dev_lock(hdev);
5222
5223 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5224 if (!conn || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
5225 goto unlock;
5226
5227 /* Assume remote supports SSP since it has triggered this event */
5228 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
5229
5230 hci_conn_hold(conn);
5231
5232 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5233 goto unlock;
5234
5235 /* Allow pairing if we're pairable, the initiators of the
5236 * pairing or if the remote is not requesting bonding.
5237 */
5238 if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
5239 test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
5240 (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
5241 struct hci_cp_io_capability_reply cp;
5242
5243 bacpy(&cp.bdaddr, &ev->bdaddr);
5244 /* Change the IO capability from KeyboardDisplay
5245 * to DisplayYesNo as it is not supported by BT spec. */
5246 cp.capability = (conn->io_capability == 0x04) ?
5247 HCI_IO_DISPLAY_YESNO : conn->io_capability;
5248
5249 /* If we are initiators, there is no remote information yet */
5250 if (conn->remote_auth == 0xff) {
5251 /* Request MITM protection if our IO caps allow it
5252 * except for the no-bonding case.
5253 */
5254 if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5255 conn->auth_type != HCI_AT_NO_BONDING)
5256 conn->auth_type |= 0x01;
5257 } else {
5258 conn->auth_type = hci_get_auth_req(conn);
5259 }
5260
5261 /* If we're not bondable, force one of the non-bondable
5262 * authentication requirement values.
5263 */
5264 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
5265 conn->auth_type &= HCI_AT_NO_BONDING_MITM;
5266
5267 cp.authentication = conn->auth_type;
5268 cp.oob_data = bredr_oob_data_present(conn);
5269
5270 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
5271 sizeof(cp), &cp);
5272 } else {
5273 struct hci_cp_io_capability_neg_reply cp;
5274
5275 bacpy(&cp.bdaddr, &ev->bdaddr);
5276 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
5277
5278 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
5279 sizeof(cp), &cp);
5280 }
5281
5282 unlock:
5283 hci_dev_unlock(hdev);
5284 }
5285
hci_io_capa_reply_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5286 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data,
5287 struct sk_buff *skb)
5288 {
5289 struct hci_ev_io_capa_reply *ev = data;
5290 struct hci_conn *conn;
5291
5292 bt_dev_dbg(hdev, "");
5293
5294 hci_dev_lock(hdev);
5295
5296 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5297 if (!conn)
5298 goto unlock;
5299
5300 conn->remote_cap = ev->capability;
5301 conn->remote_auth = ev->authentication;
5302
5303 unlock:
5304 hci_dev_unlock(hdev);
5305 }
5306
hci_user_confirm_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5307 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data,
5308 struct sk_buff *skb)
5309 {
5310 struct hci_ev_user_confirm_req *ev = data;
5311 int loc_mitm, rem_mitm, confirm_hint = 0;
5312 struct hci_conn *conn;
5313
5314 bt_dev_dbg(hdev, "");
5315
5316 hci_dev_lock(hdev);
5317
5318 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5319 goto unlock;
5320
5321 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5322 if (!conn)
5323 goto unlock;
5324
5325 loc_mitm = (conn->auth_type & 0x01);
5326 rem_mitm = (conn->remote_auth & 0x01);
5327
5328 /* If we require MITM but the remote device can't provide that
5329 * (it has NoInputNoOutput) then reject the confirmation
5330 * request. We check the security level here since it doesn't
5331 * necessarily match conn->auth_type.
5332 */
5333 if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
5334 conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
5335 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM");
5336 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
5337 sizeof(ev->bdaddr), &ev->bdaddr);
5338 goto unlock;
5339 }
5340
5341 /* If no side requires MITM protection; use JUST_CFM method */
5342 if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
5343 (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
5344
5345 /* If we're not the initiator of request authorization and the
5346 * local IO capability is not NoInputNoOutput, use JUST_WORKS
5347 * method (mgmt_user_confirm with confirm_hint set to 1).
5348 */
5349 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5350 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) {
5351 bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5352 confirm_hint = 1;
5353 goto confirm;
5354 }
5355
5356 /* If there already exists link key in local host, leave the
5357 * decision to user space since the remote device could be
5358 * legitimate or malicious.
5359 */
5360 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5361 bt_dev_dbg(hdev, "Local host already has link key");
5362 confirm_hint = 1;
5363 goto confirm;
5364 }
5365
5366 BT_DBG("Auto-accept of user confirmation with %ums delay",
5367 hdev->auto_accept_delay);
5368
5369 if (hdev->auto_accept_delay > 0) {
5370 int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5371 queue_delayed_work(conn->hdev->workqueue,
5372 &conn->auto_accept_work, delay);
5373 goto unlock;
5374 }
5375
5376 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5377 sizeof(ev->bdaddr), &ev->bdaddr);
5378 goto unlock;
5379 }
5380
5381 confirm:
5382 mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5383 le32_to_cpu(ev->passkey), confirm_hint);
5384
5385 unlock:
5386 hci_dev_unlock(hdev);
5387 }
5388
hci_user_passkey_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5389 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5390 struct sk_buff *skb)
5391 {
5392 struct hci_ev_user_passkey_req *ev = data;
5393
5394 bt_dev_dbg(hdev, "");
5395
5396 if (hci_dev_test_flag(hdev, HCI_MGMT))
5397 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5398 }
5399
hci_user_passkey_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5400 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5401 struct sk_buff *skb)
5402 {
5403 struct hci_ev_user_passkey_notify *ev = data;
5404 struct hci_conn *conn;
5405
5406 bt_dev_dbg(hdev, "");
5407
5408 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5409 if (!conn)
5410 return;
5411
5412 conn->passkey_notify = __le32_to_cpu(ev->passkey);
5413 conn->passkey_entered = 0;
5414
5415 if (hci_dev_test_flag(hdev, HCI_MGMT))
5416 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5417 conn->dst_type, conn->passkey_notify,
5418 conn->passkey_entered);
5419 }
5420
hci_keypress_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5421 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5422 struct sk_buff *skb)
5423 {
5424 struct hci_ev_keypress_notify *ev = data;
5425 struct hci_conn *conn;
5426
5427 bt_dev_dbg(hdev, "");
5428
5429 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5430 if (!conn)
5431 return;
5432
5433 switch (ev->type) {
5434 case HCI_KEYPRESS_STARTED:
5435 conn->passkey_entered = 0;
5436 return;
5437
5438 case HCI_KEYPRESS_ENTERED:
5439 conn->passkey_entered++;
5440 break;
5441
5442 case HCI_KEYPRESS_ERASED:
5443 conn->passkey_entered--;
5444 break;
5445
5446 case HCI_KEYPRESS_CLEARED:
5447 conn->passkey_entered = 0;
5448 break;
5449
5450 case HCI_KEYPRESS_COMPLETED:
5451 return;
5452 }
5453
5454 if (hci_dev_test_flag(hdev, HCI_MGMT))
5455 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5456 conn->dst_type, conn->passkey_notify,
5457 conn->passkey_entered);
5458 }
5459
hci_simple_pair_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5460 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5461 struct sk_buff *skb)
5462 {
5463 struct hci_ev_simple_pair_complete *ev = data;
5464 struct hci_conn *conn;
5465
5466 bt_dev_dbg(hdev, "");
5467
5468 hci_dev_lock(hdev);
5469
5470 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5471 if (!conn || !hci_conn_ssp_enabled(conn))
5472 goto unlock;
5473
5474 /* Reset the authentication requirement to unknown */
5475 conn->remote_auth = 0xff;
5476
5477 /* To avoid duplicate auth_failed events to user space we check
5478 * the HCI_CONN_AUTH_PEND flag which will be set if we
5479 * initiated the authentication. A traditional auth_complete
5480 * event gets always produced as initiator and is also mapped to
5481 * the mgmt_auth_failed event */
5482 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5483 mgmt_auth_failed(conn, ev->status);
5484
5485 hci_conn_drop(conn);
5486
5487 unlock:
5488 hci_dev_unlock(hdev);
5489 }
5490
hci_remote_host_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5491 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5492 struct sk_buff *skb)
5493 {
5494 struct hci_ev_remote_host_features *ev = data;
5495 struct inquiry_entry *ie;
5496 struct hci_conn *conn;
5497
5498 bt_dev_dbg(hdev, "");
5499
5500 hci_dev_lock(hdev);
5501
5502 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5503 if (conn)
5504 memcpy(conn->features[1], ev->features, 8);
5505
5506 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5507 if (ie)
5508 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5509
5510 hci_dev_unlock(hdev);
5511 }
5512
hci_remote_oob_data_request_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5513 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5514 struct sk_buff *skb)
5515 {
5516 struct hci_ev_remote_oob_data_request *ev = edata;
5517 struct oob_data *data;
5518
5519 bt_dev_dbg(hdev, "");
5520
5521 hci_dev_lock(hdev);
5522
5523 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5524 goto unlock;
5525
5526 data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5527 if (!data) {
5528 struct hci_cp_remote_oob_data_neg_reply cp;
5529
5530 bacpy(&cp.bdaddr, &ev->bdaddr);
5531 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5532 sizeof(cp), &cp);
5533 goto unlock;
5534 }
5535
5536 if (bredr_sc_enabled(hdev)) {
5537 struct hci_cp_remote_oob_ext_data_reply cp;
5538
5539 bacpy(&cp.bdaddr, &ev->bdaddr);
5540 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5541 memset(cp.hash192, 0, sizeof(cp.hash192));
5542 memset(cp.rand192, 0, sizeof(cp.rand192));
5543 } else {
5544 memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5545 memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5546 }
5547 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5548 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5549
5550 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5551 sizeof(cp), &cp);
5552 } else {
5553 struct hci_cp_remote_oob_data_reply cp;
5554
5555 bacpy(&cp.bdaddr, &ev->bdaddr);
5556 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5557 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5558
5559 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5560 sizeof(cp), &cp);
5561 }
5562
5563 unlock:
5564 hci_dev_unlock(hdev);
5565 }
5566
le_conn_update_addr(struct hci_conn * conn,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * local_rpa)5567 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5568 u8 bdaddr_type, bdaddr_t *local_rpa)
5569 {
5570 if (conn->out) {
5571 conn->dst_type = bdaddr_type;
5572 conn->resp_addr_type = bdaddr_type;
5573 bacpy(&conn->resp_addr, bdaddr);
5574
5575 /* Check if the controller has set a Local RPA then it must be
5576 * used instead or hdev->rpa.
5577 */
5578 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5579 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5580 bacpy(&conn->init_addr, local_rpa);
5581 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5582 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5583 bacpy(&conn->init_addr, &conn->hdev->rpa);
5584 } else {
5585 hci_copy_identity_address(conn->hdev, &conn->init_addr,
5586 &conn->init_addr_type);
5587 }
5588 } else {
5589 conn->resp_addr_type = conn->hdev->adv_addr_type;
5590 /* Check if the controller has set a Local RPA then it must be
5591 * used instead or hdev->rpa.
5592 */
5593 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5594 conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5595 bacpy(&conn->resp_addr, local_rpa);
5596 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5597 /* In case of ext adv, resp_addr will be updated in
5598 * Adv Terminated event.
5599 */
5600 if (!ext_adv_capable(conn->hdev))
5601 bacpy(&conn->resp_addr,
5602 &conn->hdev->random_addr);
5603 } else {
5604 bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5605 }
5606
5607 conn->init_addr_type = bdaddr_type;
5608 bacpy(&conn->init_addr, bdaddr);
5609
5610 /* For incoming connections, set the default minimum
5611 * and maximum connection interval. They will be used
5612 * to check if the parameters are in range and if not
5613 * trigger the connection update procedure.
5614 */
5615 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5616 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5617 }
5618 }
5619
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)5620 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5621 bdaddr_t *bdaddr, u8 bdaddr_type,
5622 bdaddr_t *local_rpa, u8 role, u16 handle,
5623 u16 interval, u16 latency,
5624 u16 supervision_timeout)
5625 {
5626 struct hci_conn_params *params;
5627 struct hci_conn *conn;
5628 struct smp_irk *irk;
5629 u8 addr_type;
5630
5631 hci_dev_lock(hdev);
5632
5633 /* All controllers implicitly stop advertising in the event of a
5634 * connection, so ensure that the state bit is cleared.
5635 */
5636 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5637
5638 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
5639 if (!conn) {
5640 /* In case of error status and there is no connection pending
5641 * just unlock as there is nothing to cleanup.
5642 */
5643 if (status)
5644 goto unlock;
5645
5646 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
5647 if (IS_ERR(conn)) {
5648 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
5649 goto unlock;
5650 }
5651
5652 conn->dst_type = bdaddr_type;
5653
5654 /* If we didn't have a hci_conn object previously
5655 * but we're in central role this must be something
5656 * initiated using an accept list. Since accept list based
5657 * connections are not "first class citizens" we don't
5658 * have full tracking of them. Therefore, we go ahead
5659 * with a "best effort" approach of determining the
5660 * initiator address based on the HCI_PRIVACY flag.
5661 */
5662 if (conn->out) {
5663 conn->resp_addr_type = bdaddr_type;
5664 bacpy(&conn->resp_addr, bdaddr);
5665 if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5666 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5667 bacpy(&conn->init_addr, &hdev->rpa);
5668 } else {
5669 hci_copy_identity_address(hdev,
5670 &conn->init_addr,
5671 &conn->init_addr_type);
5672 }
5673 }
5674 } else {
5675 cancel_delayed_work(&conn->le_conn_timeout);
5676 }
5677
5678 /* The HCI_LE_Connection_Complete event is only sent once per connection.
5679 * Processing it more than once per connection can corrupt kernel memory.
5680 *
5681 * As the connection handle is set here for the first time, it indicates
5682 * whether the connection is already set up.
5683 */
5684 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5685 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5686 goto unlock;
5687 }
5688
5689 le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5690
5691 /* Lookup the identity address from the stored connection
5692 * address and address type.
5693 *
5694 * When establishing connections to an identity address, the
5695 * connection procedure will store the resolvable random
5696 * address first. Now if it can be converted back into the
5697 * identity address, start using the identity address from
5698 * now on.
5699 */
5700 irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5701 if (irk) {
5702 bacpy(&conn->dst, &irk->bdaddr);
5703 conn->dst_type = irk->addr_type;
5704 }
5705
5706 conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5707
5708 /* All connection failure handling is taken care of by the
5709 * hci_conn_failed function which is triggered by the HCI
5710 * request completion callbacks used for connecting.
5711 */
5712 if (status || hci_conn_set_handle(conn, handle))
5713 goto unlock;
5714
5715 /* Drop the connection if it has been aborted */
5716 if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5717 hci_conn_drop(conn);
5718 goto unlock;
5719 }
5720
5721 if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5722 addr_type = BDADDR_LE_PUBLIC;
5723 else
5724 addr_type = BDADDR_LE_RANDOM;
5725
5726 /* Drop the connection if the device is blocked */
5727 if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5728 hci_conn_drop(conn);
5729 goto unlock;
5730 }
5731
5732 mgmt_device_connected(hdev, conn, NULL, 0);
5733
5734 conn->sec_level = BT_SECURITY_LOW;
5735 conn->state = BT_CONFIG;
5736
5737 /* Store current advertising instance as connection advertising instance
5738 * when sotfware rotation is in use so it can be re-enabled when
5739 * disconnected.
5740 */
5741 if (!ext_adv_capable(hdev))
5742 conn->adv_instance = hdev->cur_adv_instance;
5743
5744 conn->le_conn_interval = interval;
5745 conn->le_conn_latency = latency;
5746 conn->le_supv_timeout = supervision_timeout;
5747
5748 hci_debugfs_create_conn(conn);
5749 hci_conn_add_sysfs(conn);
5750
5751 /* The remote features procedure is defined for central
5752 * role only. So only in case of an initiated connection
5753 * request the remote features.
5754 *
5755 * If the local controller supports peripheral-initiated features
5756 * exchange, then requesting the remote features in peripheral
5757 * role is possible. Otherwise just transition into the
5758 * connected state without requesting the remote features.
5759 */
5760 if (conn->out ||
5761 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
5762 struct hci_cp_le_read_remote_features cp;
5763
5764 cp.handle = __cpu_to_le16(conn->handle);
5765
5766 hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
5767 sizeof(cp), &cp);
5768
5769 hci_conn_hold(conn);
5770 } else {
5771 conn->state = BT_CONNECTED;
5772 hci_connect_cfm(conn, status);
5773 }
5774
5775 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
5776 conn->dst_type);
5777 if (params) {
5778 hci_pend_le_list_del_init(params);
5779 if (params->conn) {
5780 hci_conn_drop(params->conn);
5781 hci_conn_put(params->conn);
5782 params->conn = NULL;
5783 }
5784 }
5785
5786 unlock:
5787 hci_update_passive_scan(hdev);
5788 hci_dev_unlock(hdev);
5789 }
5790
hci_le_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5791 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
5792 struct sk_buff *skb)
5793 {
5794 struct hci_ev_le_conn_complete *ev = data;
5795
5796 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5797
5798 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5799 NULL, ev->role, le16_to_cpu(ev->handle),
5800 le16_to_cpu(ev->interval),
5801 le16_to_cpu(ev->latency),
5802 le16_to_cpu(ev->supervision_timeout));
5803 }
5804
hci_le_enh_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5805 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
5806 struct sk_buff *skb)
5807 {
5808 struct hci_ev_le_enh_conn_complete *ev = data;
5809
5810 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5811
5812 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5813 &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
5814 le16_to_cpu(ev->interval),
5815 le16_to_cpu(ev->latency),
5816 le16_to_cpu(ev->supervision_timeout));
5817 }
5818
hci_le_ext_adv_term_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5819 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
5820 struct sk_buff *skb)
5821 {
5822 struct hci_evt_le_ext_adv_set_term *ev = data;
5823 struct hci_conn *conn;
5824 struct adv_info *adv, *n;
5825
5826 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5827
5828 /* The Bluetooth Core 5.3 specification clearly states that this event
5829 * shall not be sent when the Host disables the advertising set. So in
5830 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
5831 *
5832 * When the Host disables an advertising set, all cleanup is done via
5833 * its command callback and not needed to be duplicated here.
5834 */
5835 if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
5836 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
5837 return;
5838 }
5839
5840 hci_dev_lock(hdev);
5841
5842 adv = hci_find_adv_instance(hdev, ev->handle);
5843
5844 if (ev->status) {
5845 if (!adv)
5846 goto unlock;
5847
5848 /* Remove advertising as it has been terminated */
5849 hci_remove_adv_instance(hdev, ev->handle);
5850 mgmt_advertising_removed(NULL, hdev, ev->handle);
5851
5852 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
5853 if (adv->enabled)
5854 goto unlock;
5855 }
5856
5857 /* We are no longer advertising, clear HCI_LE_ADV */
5858 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5859 goto unlock;
5860 }
5861
5862 if (adv)
5863 adv->enabled = false;
5864
5865 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
5866 if (conn) {
5867 /* Store handle in the connection so the correct advertising
5868 * instance can be re-enabled when disconnected.
5869 */
5870 conn->adv_instance = ev->handle;
5871
5872 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
5873 bacmp(&conn->resp_addr, BDADDR_ANY))
5874 goto unlock;
5875
5876 if (!ev->handle) {
5877 bacpy(&conn->resp_addr, &hdev->random_addr);
5878 goto unlock;
5879 }
5880
5881 if (adv)
5882 bacpy(&conn->resp_addr, &adv->random_addr);
5883 }
5884
5885 unlock:
5886 hci_dev_unlock(hdev);
5887 }
5888
hci_le_conn_update_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5889 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
5890 struct sk_buff *skb)
5891 {
5892 struct hci_ev_le_conn_update_complete *ev = data;
5893 struct hci_conn *conn;
5894
5895 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5896
5897 if (ev->status)
5898 return;
5899
5900 hci_dev_lock(hdev);
5901
5902 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5903 if (conn) {
5904 conn->le_conn_interval = le16_to_cpu(ev->interval);
5905 conn->le_conn_latency = le16_to_cpu(ev->latency);
5906 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
5907 }
5908
5909 hci_dev_unlock(hdev);
5910 }
5911
5912 /* 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)5913 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
5914 bdaddr_t *addr,
5915 u8 addr_type, bool addr_resolved,
5916 u8 adv_type)
5917 {
5918 struct hci_conn *conn;
5919 struct hci_conn_params *params;
5920
5921 /* If the event is not connectable don't proceed further */
5922 if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
5923 return NULL;
5924
5925 /* Ignore if the device is blocked or hdev is suspended */
5926 if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
5927 hdev->suspended)
5928 return NULL;
5929
5930 /* Most controller will fail if we try to create new connections
5931 * while we have an existing one in peripheral role.
5932 */
5933 if (hdev->conn_hash.le_num_peripheral > 0 &&
5934 (!test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) ||
5935 !(hdev->le_states[3] & 0x10)))
5936 return NULL;
5937
5938 /* If we're not connectable only connect devices that we have in
5939 * our pend_le_conns list.
5940 */
5941 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
5942 addr_type);
5943 if (!params)
5944 return NULL;
5945
5946 if (!params->explicit_connect) {
5947 switch (params->auto_connect) {
5948 case HCI_AUTO_CONN_DIRECT:
5949 /* Only devices advertising with ADV_DIRECT_IND are
5950 * triggering a connection attempt. This is allowing
5951 * incoming connections from peripheral devices.
5952 */
5953 if (adv_type != LE_ADV_DIRECT_IND)
5954 return NULL;
5955 break;
5956 case HCI_AUTO_CONN_ALWAYS:
5957 /* Devices advertising with ADV_IND or ADV_DIRECT_IND
5958 * are triggering a connection attempt. This means
5959 * that incoming connections from peripheral device are
5960 * accepted and also outgoing connections to peripheral
5961 * devices are established when found.
5962 */
5963 break;
5964 default:
5965 return NULL;
5966 }
5967 }
5968
5969 conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
5970 BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
5971 HCI_ROLE_MASTER);
5972 if (!IS_ERR(conn)) {
5973 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
5974 * by higher layer that tried to connect, if no then
5975 * store the pointer since we don't really have any
5976 * other owner of the object besides the params that
5977 * triggered it. This way we can abort the connection if
5978 * the parameters get removed and keep the reference
5979 * count consistent once the connection is established.
5980 */
5981
5982 if (!params->explicit_connect)
5983 params->conn = hci_conn_get(conn);
5984
5985 return conn;
5986 }
5987
5988 switch (PTR_ERR(conn)) {
5989 case -EBUSY:
5990 /* If hci_connect() returns -EBUSY it means there is already
5991 * an LE connection attempt going on. Since controllers don't
5992 * support more than one connection attempt at the time, we
5993 * don't consider this an error case.
5994 */
5995 break;
5996 default:
5997 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
5998 return NULL;
5999 }
6000
6001 return NULL;
6002 }
6003
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)6004 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
6005 u8 bdaddr_type, bdaddr_t *direct_addr,
6006 u8 direct_addr_type, s8 rssi, u8 *data, u8 len,
6007 bool ext_adv, bool ctl_time, u64 instant)
6008 {
6009 struct discovery_state *d = &hdev->discovery;
6010 struct smp_irk *irk;
6011 struct hci_conn *conn;
6012 bool match, bdaddr_resolved;
6013 u32 flags;
6014 u8 *ptr;
6015
6016 switch (type) {
6017 case LE_ADV_IND:
6018 case LE_ADV_DIRECT_IND:
6019 case LE_ADV_SCAN_IND:
6020 case LE_ADV_NONCONN_IND:
6021 case LE_ADV_SCAN_RSP:
6022 break;
6023 default:
6024 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6025 "type: 0x%02x", type);
6026 return;
6027 }
6028
6029 if (len > max_adv_len(hdev)) {
6030 bt_dev_err_ratelimited(hdev,
6031 "adv larger than maximum supported");
6032 return;
6033 }
6034
6035 /* Find the end of the data in case the report contains padded zero
6036 * bytes at the end causing an invalid length value.
6037 *
6038 * When data is NULL, len is 0 so there is no need for extra ptr
6039 * check as 'ptr < data + 0' is already false in such case.
6040 */
6041 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6042 if (ptr + 1 + *ptr > data + len)
6043 break;
6044 }
6045
6046 /* Adjust for actual length. This handles the case when remote
6047 * device is advertising with incorrect data length.
6048 */
6049 len = ptr - data;
6050
6051 /* If the direct address is present, then this report is from
6052 * a LE Direct Advertising Report event. In that case it is
6053 * important to see if the address is matching the local
6054 * controller address.
6055 */
6056 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr) {
6057 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6058 &bdaddr_resolved);
6059
6060 /* Only resolvable random addresses are valid for these
6061 * kind of reports and others can be ignored.
6062 */
6063 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6064 return;
6065
6066 /* If the controller is not using resolvable random
6067 * addresses, then this report can be ignored.
6068 */
6069 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
6070 return;
6071
6072 /* If the local IRK of the controller does not match
6073 * with the resolvable random address provided, then
6074 * this report can be ignored.
6075 */
6076 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6077 return;
6078 }
6079
6080 /* Check if we need to convert to identity address */
6081 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6082 if (irk) {
6083 bdaddr = &irk->bdaddr;
6084 bdaddr_type = irk->addr_type;
6085 }
6086
6087 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6088
6089 /* Check if we have been requested to connect to this device.
6090 *
6091 * direct_addr is set only for directed advertising reports (it is NULL
6092 * for advertising reports) and is already verified to be RPA above.
6093 */
6094 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6095 type);
6096 if (!ext_adv && conn && type == LE_ADV_IND &&
6097 len <= max_adv_len(hdev)) {
6098 /* Store report for later inclusion by
6099 * mgmt_device_connected
6100 */
6101 memcpy(conn->le_adv_data, data, len);
6102 conn->le_adv_data_len = len;
6103 }
6104
6105 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6106 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6107 else
6108 flags = 0;
6109
6110 /* All scan results should be sent up for Mesh systems */
6111 if (hci_dev_test_flag(hdev, HCI_MESH)) {
6112 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6113 rssi, flags, data, len, NULL, 0, instant);
6114 return;
6115 }
6116
6117 /* Passive scanning shouldn't trigger any device found events,
6118 * except for devices marked as CONN_REPORT for which we do send
6119 * device found events, or advertisement monitoring requested.
6120 */
6121 if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6122 if (type == LE_ADV_DIRECT_IND)
6123 return;
6124
6125 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6126 bdaddr, bdaddr_type) &&
6127 idr_is_empty(&hdev->adv_monitors_idr))
6128 return;
6129
6130 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6131 rssi, flags, data, len, NULL, 0, 0);
6132 return;
6133 }
6134
6135 /* When receiving a scan response, then there is no way to
6136 * know if the remote device is connectable or not. However
6137 * since scan responses are merged with a previously seen
6138 * advertising report, the flags field from that report
6139 * will be used.
6140 *
6141 * In the unlikely case that a controller just sends a scan
6142 * response event that doesn't match the pending report, then
6143 * it is marked as a standalone SCAN_RSP.
6144 */
6145 if (type == LE_ADV_SCAN_RSP)
6146 flags = MGMT_DEV_FOUND_SCAN_RSP;
6147
6148 /* If there's nothing pending either store the data from this
6149 * event or send an immediate device found event if the data
6150 * should not be stored for later.
6151 */
6152 if (!ext_adv && !has_pending_adv_report(hdev)) {
6153 /* If the report will trigger a SCAN_REQ store it for
6154 * later merging.
6155 */
6156 if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) {
6157 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6158 rssi, flags, data, len);
6159 return;
6160 }
6161
6162 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6163 rssi, flags, data, len, NULL, 0, 0);
6164 return;
6165 }
6166
6167 /* Check if the pending report is for the same device as the new one */
6168 match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6169 bdaddr_type == d->last_adv_addr_type);
6170
6171 /* If the pending data doesn't match this report or this isn't a
6172 * scan response (e.g. we got a duplicate ADV_IND) then force
6173 * sending of the pending data.
6174 */
6175 if (type != LE_ADV_SCAN_RSP || !match) {
6176 /* Send out whatever is in the cache, but skip duplicates */
6177 if (!match)
6178 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6179 d->last_adv_addr_type, NULL,
6180 d->last_adv_rssi, d->last_adv_flags,
6181 d->last_adv_data,
6182 d->last_adv_data_len, NULL, 0, 0);
6183
6184 /* If the new report will trigger a SCAN_REQ store it for
6185 * later merging.
6186 */
6187 if (!ext_adv && (type == LE_ADV_IND ||
6188 type == LE_ADV_SCAN_IND)) {
6189 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6190 rssi, flags, data, len);
6191 return;
6192 }
6193
6194 /* The advertising reports cannot be merged, so clear
6195 * the pending report and send out a device found event.
6196 */
6197 clear_pending_adv_report(hdev);
6198 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6199 rssi, flags, data, len, NULL, 0, 0);
6200 return;
6201 }
6202
6203 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6204 * the new event is a SCAN_RSP. We can therefore proceed with
6205 * sending a merged device found event.
6206 */
6207 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6208 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6209 d->last_adv_data, d->last_adv_data_len, data, len, 0);
6210 clear_pending_adv_report(hdev);
6211 }
6212
hci_le_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6213 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6214 struct sk_buff *skb)
6215 {
6216 struct hci_ev_le_advertising_report *ev = data;
6217 u64 instant = jiffies;
6218
6219 if (!ev->num)
6220 return;
6221
6222 hci_dev_lock(hdev);
6223
6224 while (ev->num--) {
6225 struct hci_ev_le_advertising_info *info;
6226 s8 rssi;
6227
6228 info = hci_le_ev_skb_pull(hdev, skb,
6229 HCI_EV_LE_ADVERTISING_REPORT,
6230 sizeof(*info));
6231 if (!info)
6232 break;
6233
6234 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6235 info->length + 1))
6236 break;
6237
6238 if (info->length <= max_adv_len(hdev)) {
6239 rssi = info->data[info->length];
6240 process_adv_report(hdev, info->type, &info->bdaddr,
6241 info->bdaddr_type, NULL, 0, rssi,
6242 info->data, info->length, false,
6243 false, instant);
6244 } else {
6245 bt_dev_err(hdev, "Dropping invalid advertising data");
6246 }
6247 }
6248
6249 hci_dev_unlock(hdev);
6250 }
6251
ext_evt_type_to_legacy(struct hci_dev * hdev,u16 evt_type)6252 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6253 {
6254 if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6255 switch (evt_type) {
6256 case LE_LEGACY_ADV_IND:
6257 return LE_ADV_IND;
6258 case LE_LEGACY_ADV_DIRECT_IND:
6259 return LE_ADV_DIRECT_IND;
6260 case LE_LEGACY_ADV_SCAN_IND:
6261 return LE_ADV_SCAN_IND;
6262 case LE_LEGACY_NONCONN_IND:
6263 return LE_ADV_NONCONN_IND;
6264 case LE_LEGACY_SCAN_RSP_ADV:
6265 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6266 return LE_ADV_SCAN_RSP;
6267 }
6268
6269 goto invalid;
6270 }
6271
6272 if (evt_type & LE_EXT_ADV_CONN_IND) {
6273 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6274 return LE_ADV_DIRECT_IND;
6275
6276 return LE_ADV_IND;
6277 }
6278
6279 if (evt_type & LE_EXT_ADV_SCAN_RSP)
6280 return LE_ADV_SCAN_RSP;
6281
6282 if (evt_type & LE_EXT_ADV_SCAN_IND)
6283 return LE_ADV_SCAN_IND;
6284
6285 if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6286 evt_type & LE_EXT_ADV_DIRECT_IND)
6287 return LE_ADV_NONCONN_IND;
6288
6289 invalid:
6290 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6291 evt_type);
6292
6293 return LE_ADV_INVALID;
6294 }
6295
hci_le_ext_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6296 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6297 struct sk_buff *skb)
6298 {
6299 struct hci_ev_le_ext_adv_report *ev = data;
6300 u64 instant = jiffies;
6301
6302 if (!ev->num)
6303 return;
6304
6305 hci_dev_lock(hdev);
6306
6307 while (ev->num--) {
6308 struct hci_ev_le_ext_adv_info *info;
6309 u8 legacy_evt_type;
6310 u16 evt_type;
6311
6312 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6313 sizeof(*info));
6314 if (!info)
6315 break;
6316
6317 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6318 info->length))
6319 break;
6320
6321 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6322 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6323 if (legacy_evt_type != LE_ADV_INVALID) {
6324 process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6325 info->bdaddr_type, NULL, 0,
6326 info->rssi, info->data, info->length,
6327 !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6328 false, instant);
6329 }
6330 }
6331
6332 hci_dev_unlock(hdev);
6333 }
6334
hci_le_pa_term_sync(struct hci_dev * hdev,__le16 handle)6335 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6336 {
6337 struct hci_cp_le_pa_term_sync cp;
6338
6339 memset(&cp, 0, sizeof(cp));
6340 cp.handle = handle;
6341
6342 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6343 }
6344
hci_le_pa_sync_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6345 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6346 struct sk_buff *skb)
6347 {
6348 struct hci_ev_le_pa_sync_established *ev = data;
6349 int mask = hdev->link_mode;
6350 __u8 flags = 0;
6351 struct hci_conn *pa_sync;
6352
6353 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6354
6355 hci_dev_lock(hdev);
6356
6357 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6358
6359 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags);
6360 if (!(mask & HCI_LM_ACCEPT)) {
6361 hci_le_pa_term_sync(hdev, ev->handle);
6362 goto unlock;
6363 }
6364
6365 if (!(flags & HCI_PROTO_DEFER))
6366 goto unlock;
6367
6368 if (ev->status) {
6369 /* Add connection to indicate the failed PA sync event */
6370 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6371 HCI_ROLE_SLAVE);
6372
6373 if (!pa_sync)
6374 goto unlock;
6375
6376 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6377
6378 /* Notify iso layer */
6379 hci_connect_cfm(pa_sync, ev->status);
6380 }
6381
6382 unlock:
6383 hci_dev_unlock(hdev);
6384 }
6385
hci_le_per_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6386 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6387 struct sk_buff *skb)
6388 {
6389 struct hci_ev_le_per_adv_report *ev = data;
6390 int mask = hdev->link_mode;
6391 __u8 flags = 0;
6392
6393 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6394
6395 hci_dev_lock(hdev);
6396
6397 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6398 if (!(mask & HCI_LM_ACCEPT))
6399 hci_le_pa_term_sync(hdev, ev->sync_handle);
6400
6401 hci_dev_unlock(hdev);
6402 }
6403
hci_le_remote_feat_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6404 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6405 struct sk_buff *skb)
6406 {
6407 struct hci_ev_le_remote_feat_complete *ev = data;
6408 struct hci_conn *conn;
6409
6410 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6411
6412 hci_dev_lock(hdev);
6413
6414 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6415 if (conn) {
6416 if (!ev->status)
6417 memcpy(conn->features[0], ev->features, 8);
6418
6419 if (conn->state == BT_CONFIG) {
6420 __u8 status;
6421
6422 /* If the local controller supports peripheral-initiated
6423 * features exchange, but the remote controller does
6424 * not, then it is possible that the error code 0x1a
6425 * for unsupported remote feature gets returned.
6426 *
6427 * In this specific case, allow the connection to
6428 * transition into connected state and mark it as
6429 * successful.
6430 */
6431 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE &&
6432 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6433 status = 0x00;
6434 else
6435 status = ev->status;
6436
6437 conn->state = BT_CONNECTED;
6438 hci_connect_cfm(conn, status);
6439 hci_conn_drop(conn);
6440 }
6441 }
6442
6443 hci_dev_unlock(hdev);
6444 }
6445
hci_le_ltk_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6446 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6447 struct sk_buff *skb)
6448 {
6449 struct hci_ev_le_ltk_req *ev = data;
6450 struct hci_cp_le_ltk_reply cp;
6451 struct hci_cp_le_ltk_neg_reply neg;
6452 struct hci_conn *conn;
6453 struct smp_ltk *ltk;
6454
6455 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6456
6457 hci_dev_lock(hdev);
6458
6459 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6460 if (conn == NULL)
6461 goto not_found;
6462
6463 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6464 if (!ltk)
6465 goto not_found;
6466
6467 if (smp_ltk_is_sc(ltk)) {
6468 /* With SC both EDiv and Rand are set to zero */
6469 if (ev->ediv || ev->rand)
6470 goto not_found;
6471 } else {
6472 /* For non-SC keys check that EDiv and Rand match */
6473 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6474 goto not_found;
6475 }
6476
6477 memcpy(cp.ltk, ltk->val, ltk->enc_size);
6478 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6479 cp.handle = cpu_to_le16(conn->handle);
6480
6481 conn->pending_sec_level = smp_ltk_sec_level(ltk);
6482
6483 conn->enc_key_size = ltk->enc_size;
6484
6485 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6486
6487 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6488 * temporary key used to encrypt a connection following
6489 * pairing. It is used during the Encrypted Session Setup to
6490 * distribute the keys. Later, security can be re-established
6491 * using a distributed LTK.
6492 */
6493 if (ltk->type == SMP_STK) {
6494 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6495 list_del_rcu(<k->list);
6496 kfree_rcu(ltk, rcu);
6497 } else {
6498 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6499 }
6500
6501 hci_dev_unlock(hdev);
6502
6503 return;
6504
6505 not_found:
6506 neg.handle = ev->handle;
6507 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6508 hci_dev_unlock(hdev);
6509 }
6510
send_conn_param_neg_reply(struct hci_dev * hdev,u16 handle,u8 reason)6511 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6512 u8 reason)
6513 {
6514 struct hci_cp_le_conn_param_req_neg_reply cp;
6515
6516 cp.handle = cpu_to_le16(handle);
6517 cp.reason = reason;
6518
6519 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6520 &cp);
6521 }
6522
hci_le_remote_conn_param_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6523 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6524 struct sk_buff *skb)
6525 {
6526 struct hci_ev_le_remote_conn_param_req *ev = data;
6527 struct hci_cp_le_conn_param_req_reply cp;
6528 struct hci_conn *hcon;
6529 u16 handle, min, max, latency, timeout;
6530
6531 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6532
6533 handle = le16_to_cpu(ev->handle);
6534 min = le16_to_cpu(ev->interval_min);
6535 max = le16_to_cpu(ev->interval_max);
6536 latency = le16_to_cpu(ev->latency);
6537 timeout = le16_to_cpu(ev->timeout);
6538
6539 hcon = hci_conn_hash_lookup_handle(hdev, handle);
6540 if (!hcon || hcon->state != BT_CONNECTED)
6541 return send_conn_param_neg_reply(hdev, handle,
6542 HCI_ERROR_UNKNOWN_CONN_ID);
6543
6544 if (max > hcon->le_conn_max_interval)
6545 return send_conn_param_neg_reply(hdev, handle,
6546 HCI_ERROR_INVALID_LL_PARAMS);
6547
6548 if (hci_check_conn_params(min, max, latency, timeout))
6549 return send_conn_param_neg_reply(hdev, handle,
6550 HCI_ERROR_INVALID_LL_PARAMS);
6551
6552 if (hcon->role == HCI_ROLE_MASTER) {
6553 struct hci_conn_params *params;
6554 u8 store_hint;
6555
6556 hci_dev_lock(hdev);
6557
6558 params = hci_conn_params_lookup(hdev, &hcon->dst,
6559 hcon->dst_type);
6560 if (params) {
6561 params->conn_min_interval = min;
6562 params->conn_max_interval = max;
6563 params->conn_latency = latency;
6564 params->supervision_timeout = timeout;
6565 store_hint = 0x01;
6566 } else {
6567 store_hint = 0x00;
6568 }
6569
6570 hci_dev_unlock(hdev);
6571
6572 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6573 store_hint, min, max, latency, timeout);
6574 }
6575
6576 cp.handle = ev->handle;
6577 cp.interval_min = ev->interval_min;
6578 cp.interval_max = ev->interval_max;
6579 cp.latency = ev->latency;
6580 cp.timeout = ev->timeout;
6581 cp.min_ce_len = 0;
6582 cp.max_ce_len = 0;
6583
6584 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6585 }
6586
hci_le_direct_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6587 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6588 struct sk_buff *skb)
6589 {
6590 struct hci_ev_le_direct_adv_report *ev = data;
6591 u64 instant = jiffies;
6592 int i;
6593
6594 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6595 flex_array_size(ev, info, ev->num)))
6596 return;
6597
6598 if (!ev->num)
6599 return;
6600
6601 hci_dev_lock(hdev);
6602
6603 for (i = 0; i < ev->num; i++) {
6604 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6605
6606 process_adv_report(hdev, info->type, &info->bdaddr,
6607 info->bdaddr_type, &info->direct_addr,
6608 info->direct_addr_type, info->rssi, NULL, 0,
6609 false, false, instant);
6610 }
6611
6612 hci_dev_unlock(hdev);
6613 }
6614
hci_le_phy_update_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6615 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6616 struct sk_buff *skb)
6617 {
6618 struct hci_ev_le_phy_update_complete *ev = data;
6619 struct hci_conn *conn;
6620
6621 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6622
6623 if (ev->status)
6624 return;
6625
6626 hci_dev_lock(hdev);
6627
6628 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6629 if (!conn)
6630 goto unlock;
6631
6632 conn->le_tx_phy = ev->tx_phy;
6633 conn->le_rx_phy = ev->rx_phy;
6634
6635 unlock:
6636 hci_dev_unlock(hdev);
6637 }
6638
hci_le_cis_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6639 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6640 struct sk_buff *skb)
6641 {
6642 struct hci_evt_le_cis_established *ev = data;
6643 struct hci_conn *conn;
6644 struct bt_iso_qos *qos;
6645 bool pending = false;
6646 u16 handle = __le16_to_cpu(ev->handle);
6647 u32 c_sdu_interval, p_sdu_interval;
6648
6649 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6650
6651 hci_dev_lock(hdev);
6652
6653 conn = hci_conn_hash_lookup_handle(hdev, handle);
6654 if (!conn) {
6655 bt_dev_err(hdev,
6656 "Unable to find connection with handle 0x%4.4x",
6657 handle);
6658 goto unlock;
6659 }
6660
6661 if (conn->type != ISO_LINK) {
6662 bt_dev_err(hdev,
6663 "Invalid connection link type handle 0x%4.4x",
6664 handle);
6665 goto unlock;
6666 }
6667
6668 qos = &conn->iso_qos;
6669
6670 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6671
6672 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part G
6673 * page 3075:
6674 * Transport_Latency_C_To_P = CIG_Sync_Delay + (FT_C_To_P) ×
6675 * ISO_Interval + SDU_Interval_C_To_P
6676 * ...
6677 * SDU_Interval = (CIG_Sync_Delay + (FT) x ISO_Interval) -
6678 * Transport_Latency
6679 */
6680 c_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6681 (ev->c_ft * le16_to_cpu(ev->interval) * 1250)) -
6682 get_unaligned_le24(ev->c_latency);
6683 p_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6684 (ev->p_ft * le16_to_cpu(ev->interval) * 1250)) -
6685 get_unaligned_le24(ev->p_latency);
6686
6687 switch (conn->role) {
6688 case HCI_ROLE_SLAVE:
6689 qos->ucast.in.interval = c_sdu_interval;
6690 qos->ucast.out.interval = p_sdu_interval;
6691 /* Convert Transport Latency (us) to Latency (msec) */
6692 qos->ucast.in.latency =
6693 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6694 1000);
6695 qos->ucast.out.latency =
6696 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6697 1000);
6698 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6699 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6700 qos->ucast.in.phy = ev->c_phy;
6701 qos->ucast.out.phy = ev->p_phy;
6702 break;
6703 case HCI_ROLE_MASTER:
6704 qos->ucast.in.interval = p_sdu_interval;
6705 qos->ucast.out.interval = c_sdu_interval;
6706 /* Convert Transport Latency (us) to Latency (msec) */
6707 qos->ucast.out.latency =
6708 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6709 1000);
6710 qos->ucast.in.latency =
6711 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6712 1000);
6713 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6714 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6715 qos->ucast.out.phy = ev->c_phy;
6716 qos->ucast.in.phy = ev->p_phy;
6717 break;
6718 }
6719
6720 if (!ev->status) {
6721 conn->state = BT_CONNECTED;
6722 hci_debugfs_create_conn(conn);
6723 hci_conn_add_sysfs(conn);
6724 hci_iso_setup_path(conn);
6725 goto unlock;
6726 }
6727
6728 conn->state = BT_CLOSED;
6729 hci_connect_cfm(conn, ev->status);
6730 hci_conn_del(conn);
6731
6732 unlock:
6733 if (pending)
6734 hci_le_create_cis_pending(hdev);
6735
6736 hci_dev_unlock(hdev);
6737 }
6738
hci_le_reject_cis(struct hci_dev * hdev,__le16 handle)6739 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6740 {
6741 struct hci_cp_le_reject_cis cp;
6742
6743 memset(&cp, 0, sizeof(cp));
6744 cp.handle = handle;
6745 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6746 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6747 }
6748
hci_le_accept_cis(struct hci_dev * hdev,__le16 handle)6749 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6750 {
6751 struct hci_cp_le_accept_cis cp;
6752
6753 memset(&cp, 0, sizeof(cp));
6754 cp.handle = handle;
6755 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6756 }
6757
hci_le_cis_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6758 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6759 struct sk_buff *skb)
6760 {
6761 struct hci_evt_le_cis_req *ev = data;
6762 u16 acl_handle, cis_handle;
6763 struct hci_conn *acl, *cis;
6764 int mask;
6765 __u8 flags = 0;
6766
6767 acl_handle = __le16_to_cpu(ev->acl_handle);
6768 cis_handle = __le16_to_cpu(ev->cis_handle);
6769
6770 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
6771 acl_handle, cis_handle, ev->cig_id, ev->cis_id);
6772
6773 hci_dev_lock(hdev);
6774
6775 acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
6776 if (!acl)
6777 goto unlock;
6778
6779 mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
6780 if (!(mask & HCI_LM_ACCEPT)) {
6781 hci_le_reject_cis(hdev, ev->cis_handle);
6782 goto unlock;
6783 }
6784
6785 cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
6786 if (!cis) {
6787 cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
6788 cis_handle);
6789 if (IS_ERR(cis)) {
6790 hci_le_reject_cis(hdev, ev->cis_handle);
6791 goto unlock;
6792 }
6793 }
6794
6795 cis->iso_qos.ucast.cig = ev->cig_id;
6796 cis->iso_qos.ucast.cis = ev->cis_id;
6797
6798 if (!(flags & HCI_PROTO_DEFER)) {
6799 hci_le_accept_cis(hdev, ev->cis_handle);
6800 } else {
6801 cis->state = BT_CONNECT2;
6802 hci_connect_cfm(cis, 0);
6803 }
6804
6805 unlock:
6806 hci_dev_unlock(hdev);
6807 }
6808
hci_iso_term_big_sync(struct hci_dev * hdev,void * data)6809 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
6810 {
6811 u8 handle = PTR_UINT(data);
6812
6813 return hci_le_terminate_big_sync(hdev, handle,
6814 HCI_ERROR_LOCAL_HOST_TERM);
6815 }
6816
hci_le_create_big_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6817 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
6818 struct sk_buff *skb)
6819 {
6820 struct hci_evt_le_create_big_complete *ev = data;
6821 struct hci_conn *conn;
6822 __u8 i = 0;
6823
6824 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
6825
6826 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
6827 flex_array_size(ev, bis_handle, ev->num_bis)))
6828 return;
6829
6830 hci_dev_lock(hdev);
6831
6832 /* Connect all BISes that are bound to the BIG */
6833 while ((conn = hci_conn_hash_lookup_big_state(hdev, ev->handle,
6834 BT_BOUND))) {
6835 if (ev->status) {
6836 hci_connect_cfm(conn, ev->status);
6837 hci_conn_del(conn);
6838 continue;
6839 }
6840
6841 if (hci_conn_set_handle(conn,
6842 __le16_to_cpu(ev->bis_handle[i++])))
6843 continue;
6844
6845 conn->state = BT_CONNECTED;
6846 set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
6847 hci_debugfs_create_conn(conn);
6848 hci_conn_add_sysfs(conn);
6849 hci_iso_setup_path(conn);
6850 }
6851
6852 if (!ev->status && !i)
6853 /* If no BISes have been connected for the BIG,
6854 * terminate. This is in case all bound connections
6855 * have been closed before the BIG creation
6856 * has completed.
6857 */
6858 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
6859 UINT_PTR(ev->handle), NULL);
6860
6861 hci_dev_unlock(hdev);
6862 }
6863
hci_le_big_sync_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6864 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
6865 struct sk_buff *skb)
6866 {
6867 struct hci_evt_le_big_sync_estabilished *ev = data;
6868 struct hci_conn *bis;
6869 struct hci_conn *pa_sync;
6870 int i;
6871
6872 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6873
6874 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
6875 flex_array_size(ev, bis, ev->num_bis)))
6876 return;
6877
6878 hci_dev_lock(hdev);
6879
6880 if (!ev->status) {
6881 pa_sync = hci_conn_hash_lookup_pa_sync_big_handle(hdev, ev->handle);
6882 if (pa_sync)
6883 /* Also mark the BIG sync established event on the
6884 * associated PA sync hcon
6885 */
6886 set_bit(HCI_CONN_BIG_SYNC, &pa_sync->flags);
6887 }
6888
6889 for (i = 0; i < ev->num_bis; i++) {
6890 u16 handle = le16_to_cpu(ev->bis[i]);
6891 __le32 interval;
6892
6893 bis = hci_conn_hash_lookup_handle(hdev, handle);
6894 if (!bis) {
6895 if (handle > HCI_CONN_HANDLE_MAX) {
6896 bt_dev_dbg(hdev, "ignore too large handle %u", handle);
6897 continue;
6898 }
6899 bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
6900 HCI_ROLE_SLAVE, handle);
6901 if (IS_ERR(bis))
6902 continue;
6903 }
6904
6905 if (ev->status != 0x42)
6906 /* Mark PA sync as established */
6907 set_bit(HCI_CONN_PA_SYNC, &bis->flags);
6908
6909 bis->iso_qos.bcast.big = ev->handle;
6910 memset(&interval, 0, sizeof(interval));
6911 memcpy(&interval, ev->latency, sizeof(ev->latency));
6912 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
6913 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
6914 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
6915 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
6916
6917 if (!ev->status) {
6918 set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
6919 hci_iso_setup_path(bis);
6920 }
6921 }
6922
6923 /* In case BIG sync failed, notify each failed connection to
6924 * the user after all hci connections have been added
6925 */
6926 if (ev->status)
6927 for (i = 0; i < ev->num_bis; i++) {
6928 u16 handle = le16_to_cpu(ev->bis[i]);
6929
6930 bis = hci_conn_hash_lookup_handle(hdev, handle);
6931 if (!bis)
6932 continue;
6933
6934 set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
6935 hci_connect_cfm(bis, ev->status);
6936 }
6937
6938 hci_dev_unlock(hdev);
6939 }
6940
hci_le_big_info_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6941 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
6942 struct sk_buff *skb)
6943 {
6944 struct hci_evt_le_big_info_adv_report *ev = data;
6945 int mask = hdev->link_mode;
6946 __u8 flags = 0;
6947 struct hci_conn *pa_sync;
6948
6949 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6950
6951 hci_dev_lock(hdev);
6952
6953 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6954 if (!(mask & HCI_LM_ACCEPT)) {
6955 hci_le_pa_term_sync(hdev, ev->sync_handle);
6956 goto unlock;
6957 }
6958
6959 if (!(flags & HCI_PROTO_DEFER))
6960 goto unlock;
6961
6962 pa_sync = hci_conn_hash_lookup_pa_sync_handle
6963 (hdev,
6964 le16_to_cpu(ev->sync_handle));
6965
6966 if (pa_sync)
6967 goto unlock;
6968
6969 /* Add connection to indicate the PA sync event */
6970 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6971 HCI_ROLE_SLAVE);
6972
6973 if (IS_ERR(pa_sync))
6974 goto unlock;
6975
6976 pa_sync->sync_handle = le16_to_cpu(ev->sync_handle);
6977 set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags);
6978
6979 /* Notify iso layer */
6980 hci_connect_cfm(pa_sync, 0x00);
6981
6982 /* Notify MGMT layer */
6983 mgmt_device_connected(hdev, pa_sync, NULL, 0);
6984
6985 unlock:
6986 hci_dev_unlock(hdev);
6987 }
6988
6989 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
6990 [_op] = { \
6991 .func = _func, \
6992 .min_len = _min_len, \
6993 .max_len = _max_len, \
6994 }
6995
6996 #define HCI_LE_EV(_op, _func, _len) \
6997 HCI_LE_EV_VL(_op, _func, _len, _len)
6998
6999 #define HCI_LE_EV_STATUS(_op, _func) \
7000 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
7001
7002 /* Entries in this table shall have their position according to the subevent
7003 * opcode they handle so the use of the macros above is recommend since it does
7004 * attempt to initialize at its proper index using Designated Initializers that
7005 * way events without a callback function can be ommited.
7006 */
7007 static const struct hci_le_ev {
7008 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
7009 u16 min_len;
7010 u16 max_len;
7011 } hci_le_ev_table[U8_MAX + 1] = {
7012 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
7013 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
7014 sizeof(struct hci_ev_le_conn_complete)),
7015 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
7016 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
7017 sizeof(struct hci_ev_le_advertising_report),
7018 HCI_MAX_EVENT_SIZE),
7019 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7020 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7021 hci_le_conn_update_complete_evt,
7022 sizeof(struct hci_ev_le_conn_update_complete)),
7023 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7024 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7025 hci_le_remote_feat_complete_evt,
7026 sizeof(struct hci_ev_le_remote_feat_complete)),
7027 /* [0x05 = HCI_EV_LE_LTK_REQ] */
7028 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7029 sizeof(struct hci_ev_le_ltk_req)),
7030 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7031 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7032 hci_le_remote_conn_param_req_evt,
7033 sizeof(struct hci_ev_le_remote_conn_param_req)),
7034 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7035 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7036 hci_le_enh_conn_complete_evt,
7037 sizeof(struct hci_ev_le_enh_conn_complete)),
7038 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7039 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7040 sizeof(struct hci_ev_le_direct_adv_report),
7041 HCI_MAX_EVENT_SIZE),
7042 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7043 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7044 sizeof(struct hci_ev_le_phy_update_complete)),
7045 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7046 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7047 sizeof(struct hci_ev_le_ext_adv_report),
7048 HCI_MAX_EVENT_SIZE),
7049 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7050 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7051 hci_le_pa_sync_estabilished_evt,
7052 sizeof(struct hci_ev_le_pa_sync_established)),
7053 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7054 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7055 hci_le_per_adv_report_evt,
7056 sizeof(struct hci_ev_le_per_adv_report),
7057 HCI_MAX_EVENT_SIZE),
7058 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7059 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7060 sizeof(struct hci_evt_le_ext_adv_set_term)),
7061 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7062 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7063 sizeof(struct hci_evt_le_cis_established)),
7064 /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7065 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7066 sizeof(struct hci_evt_le_cis_req)),
7067 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7068 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7069 hci_le_create_big_complete_evt,
7070 sizeof(struct hci_evt_le_create_big_complete),
7071 HCI_MAX_EVENT_SIZE),
7072 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABILISHED] */
7073 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7074 hci_le_big_sync_established_evt,
7075 sizeof(struct hci_evt_le_big_sync_estabilished),
7076 HCI_MAX_EVENT_SIZE),
7077 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7078 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7079 hci_le_big_info_adv_report_evt,
7080 sizeof(struct hci_evt_le_big_info_adv_report),
7081 HCI_MAX_EVENT_SIZE),
7082 };
7083
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)7084 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7085 struct sk_buff *skb, u16 *opcode, u8 *status,
7086 hci_req_complete_t *req_complete,
7087 hci_req_complete_skb_t *req_complete_skb)
7088 {
7089 struct hci_ev_le_meta *ev = data;
7090 const struct hci_le_ev *subev;
7091
7092 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7093
7094 /* Only match event if command OGF is for LE */
7095 if (hdev->req_skb &&
7096 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 &&
7097 hci_skb_event(hdev->req_skb) == ev->subevent) {
7098 *opcode = hci_skb_opcode(hdev->req_skb);
7099 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7100 req_complete_skb);
7101 }
7102
7103 subev = &hci_le_ev_table[ev->subevent];
7104 if (!subev->func)
7105 return;
7106
7107 if (skb->len < subev->min_len) {
7108 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7109 ev->subevent, skb->len, subev->min_len);
7110 return;
7111 }
7112
7113 /* Just warn if the length is over max_len size it still be
7114 * possible to partially parse the event so leave to callback to
7115 * decide if that is acceptable.
7116 */
7117 if (skb->len > subev->max_len)
7118 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7119 ev->subevent, skb->len, subev->max_len);
7120 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7121 if (!data)
7122 return;
7123
7124 subev->func(hdev, data, skb);
7125 }
7126
hci_get_cmd_complete(struct hci_dev * hdev,u16 opcode,u8 event,struct sk_buff * skb)7127 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7128 u8 event, struct sk_buff *skb)
7129 {
7130 struct hci_ev_cmd_complete *ev;
7131 struct hci_event_hdr *hdr;
7132
7133 if (!skb)
7134 return false;
7135
7136 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7137 if (!hdr)
7138 return false;
7139
7140 if (event) {
7141 if (hdr->evt != event)
7142 return false;
7143 return true;
7144 }
7145
7146 /* Check if request ended in Command Status - no way to retrieve
7147 * any extra parameters in this case.
7148 */
7149 if (hdr->evt == HCI_EV_CMD_STATUS)
7150 return false;
7151
7152 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7153 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7154 hdr->evt);
7155 return false;
7156 }
7157
7158 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7159 if (!ev)
7160 return false;
7161
7162 if (opcode != __le16_to_cpu(ev->opcode)) {
7163 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7164 __le16_to_cpu(ev->opcode));
7165 return false;
7166 }
7167
7168 return true;
7169 }
7170
hci_store_wake_reason(struct hci_dev * hdev,u8 event,struct sk_buff * skb)7171 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7172 struct sk_buff *skb)
7173 {
7174 struct hci_ev_le_advertising_info *adv;
7175 struct hci_ev_le_direct_adv_info *direct_adv;
7176 struct hci_ev_le_ext_adv_info *ext_adv;
7177 const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7178 const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7179
7180 hci_dev_lock(hdev);
7181
7182 /* If we are currently suspended and this is the first BT event seen,
7183 * save the wake reason associated with the event.
7184 */
7185 if (!hdev->suspended || hdev->wake_reason)
7186 goto unlock;
7187
7188 /* Default to remote wake. Values for wake_reason are documented in the
7189 * Bluez mgmt api docs.
7190 */
7191 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7192
7193 /* Once configured for remote wakeup, we should only wake up for
7194 * reconnections. It's useful to see which device is waking us up so
7195 * keep track of the bdaddr of the connection event that woke us up.
7196 */
7197 if (event == HCI_EV_CONN_REQUEST) {
7198 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7199 hdev->wake_addr_type = BDADDR_BREDR;
7200 } else if (event == HCI_EV_CONN_COMPLETE) {
7201 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7202 hdev->wake_addr_type = BDADDR_BREDR;
7203 } else if (event == HCI_EV_LE_META) {
7204 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7205 u8 subevent = le_ev->subevent;
7206 u8 *ptr = &skb->data[sizeof(*le_ev)];
7207 u8 num_reports = *ptr;
7208
7209 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7210 subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7211 subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7212 num_reports) {
7213 adv = (void *)(ptr + 1);
7214 direct_adv = (void *)(ptr + 1);
7215 ext_adv = (void *)(ptr + 1);
7216
7217 switch (subevent) {
7218 case HCI_EV_LE_ADVERTISING_REPORT:
7219 bacpy(&hdev->wake_addr, &adv->bdaddr);
7220 hdev->wake_addr_type = adv->bdaddr_type;
7221 break;
7222 case HCI_EV_LE_DIRECT_ADV_REPORT:
7223 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7224 hdev->wake_addr_type = direct_adv->bdaddr_type;
7225 break;
7226 case HCI_EV_LE_EXT_ADV_REPORT:
7227 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7228 hdev->wake_addr_type = ext_adv->bdaddr_type;
7229 break;
7230 }
7231 }
7232 } else {
7233 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7234 }
7235
7236 unlock:
7237 hci_dev_unlock(hdev);
7238 }
7239
7240 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7241 [_op] = { \
7242 .req = false, \
7243 .func = _func, \
7244 .min_len = _min_len, \
7245 .max_len = _max_len, \
7246 }
7247
7248 #define HCI_EV(_op, _func, _len) \
7249 HCI_EV_VL(_op, _func, _len, _len)
7250
7251 #define HCI_EV_STATUS(_op, _func) \
7252 HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7253
7254 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7255 [_op] = { \
7256 .req = true, \
7257 .func_req = _func, \
7258 .min_len = _min_len, \
7259 .max_len = _max_len, \
7260 }
7261
7262 #define HCI_EV_REQ(_op, _func, _len) \
7263 HCI_EV_REQ_VL(_op, _func, _len, _len)
7264
7265 /* Entries in this table shall have their position according to the event opcode
7266 * they handle so the use of the macros above is recommend since it does attempt
7267 * to initialize at its proper index using Designated Initializers that way
7268 * events without a callback function don't have entered.
7269 */
7270 static const struct hci_ev {
7271 bool req;
7272 union {
7273 void (*func)(struct hci_dev *hdev, void *data,
7274 struct sk_buff *skb);
7275 void (*func_req)(struct hci_dev *hdev, void *data,
7276 struct sk_buff *skb, u16 *opcode, u8 *status,
7277 hci_req_complete_t *req_complete,
7278 hci_req_complete_skb_t *req_complete_skb);
7279 };
7280 u16 min_len;
7281 u16 max_len;
7282 } hci_ev_table[U8_MAX + 1] = {
7283 /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7284 HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7285 /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7286 HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7287 sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7288 /* [0x03 = HCI_EV_CONN_COMPLETE] */
7289 HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7290 sizeof(struct hci_ev_conn_complete)),
7291 /* [0x04 = HCI_EV_CONN_REQUEST] */
7292 HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7293 sizeof(struct hci_ev_conn_request)),
7294 /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7295 HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7296 sizeof(struct hci_ev_disconn_complete)),
7297 /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7298 HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7299 sizeof(struct hci_ev_auth_complete)),
7300 /* [0x07 = HCI_EV_REMOTE_NAME] */
7301 HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7302 sizeof(struct hci_ev_remote_name)),
7303 /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7304 HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7305 sizeof(struct hci_ev_encrypt_change)),
7306 /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7307 HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7308 hci_change_link_key_complete_evt,
7309 sizeof(struct hci_ev_change_link_key_complete)),
7310 /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7311 HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7312 sizeof(struct hci_ev_remote_features)),
7313 /* [0x0e = HCI_EV_CMD_COMPLETE] */
7314 HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7315 sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7316 /* [0x0f = HCI_EV_CMD_STATUS] */
7317 HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7318 sizeof(struct hci_ev_cmd_status)),
7319 /* [0x10 = HCI_EV_CMD_STATUS] */
7320 HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7321 sizeof(struct hci_ev_hardware_error)),
7322 /* [0x12 = HCI_EV_ROLE_CHANGE] */
7323 HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7324 sizeof(struct hci_ev_role_change)),
7325 /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7326 HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7327 sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7328 /* [0x14 = HCI_EV_MODE_CHANGE] */
7329 HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7330 sizeof(struct hci_ev_mode_change)),
7331 /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7332 HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7333 sizeof(struct hci_ev_pin_code_req)),
7334 /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7335 HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7336 sizeof(struct hci_ev_link_key_req)),
7337 /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7338 HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7339 sizeof(struct hci_ev_link_key_notify)),
7340 /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7341 HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7342 sizeof(struct hci_ev_clock_offset)),
7343 /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7344 HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7345 sizeof(struct hci_ev_pkt_type_change)),
7346 /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7347 HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7348 sizeof(struct hci_ev_pscan_rep_mode)),
7349 /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7350 HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7351 hci_inquiry_result_with_rssi_evt,
7352 sizeof(struct hci_ev_inquiry_result_rssi),
7353 HCI_MAX_EVENT_SIZE),
7354 /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7355 HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7356 sizeof(struct hci_ev_remote_ext_features)),
7357 /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7358 HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7359 sizeof(struct hci_ev_sync_conn_complete)),
7360 /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7361 HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7362 hci_extended_inquiry_result_evt,
7363 sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7364 /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7365 HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7366 sizeof(struct hci_ev_key_refresh_complete)),
7367 /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7368 HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7369 sizeof(struct hci_ev_io_capa_request)),
7370 /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7371 HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7372 sizeof(struct hci_ev_io_capa_reply)),
7373 /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7374 HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7375 sizeof(struct hci_ev_user_confirm_req)),
7376 /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7377 HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7378 sizeof(struct hci_ev_user_passkey_req)),
7379 /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7380 HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7381 sizeof(struct hci_ev_remote_oob_data_request)),
7382 /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7383 HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7384 sizeof(struct hci_ev_simple_pair_complete)),
7385 /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7386 HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7387 sizeof(struct hci_ev_user_passkey_notify)),
7388 /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7389 HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7390 sizeof(struct hci_ev_keypress_notify)),
7391 /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7392 HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7393 sizeof(struct hci_ev_remote_host_features)),
7394 /* [0x3e = HCI_EV_LE_META] */
7395 HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7396 sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7397 /* [0xff = HCI_EV_VENDOR] */
7398 HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7399 };
7400
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)7401 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7402 u16 *opcode, u8 *status,
7403 hci_req_complete_t *req_complete,
7404 hci_req_complete_skb_t *req_complete_skb)
7405 {
7406 const struct hci_ev *ev = &hci_ev_table[event];
7407 void *data;
7408
7409 if (!ev->func)
7410 return;
7411
7412 if (skb->len < ev->min_len) {
7413 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7414 event, skb->len, ev->min_len);
7415 return;
7416 }
7417
7418 /* Just warn if the length is over max_len size it still be
7419 * possible to partially parse the event so leave to callback to
7420 * decide if that is acceptable.
7421 */
7422 if (skb->len > ev->max_len)
7423 bt_dev_warn_ratelimited(hdev,
7424 "unexpected event 0x%2.2x length: %u > %u",
7425 event, skb->len, ev->max_len);
7426
7427 data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7428 if (!data)
7429 return;
7430
7431 if (ev->req)
7432 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7433 req_complete_skb);
7434 else
7435 ev->func(hdev, data, skb);
7436 }
7437
hci_event_packet(struct hci_dev * hdev,struct sk_buff * skb)7438 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7439 {
7440 struct hci_event_hdr *hdr = (void *) skb->data;
7441 hci_req_complete_t req_complete = NULL;
7442 hci_req_complete_skb_t req_complete_skb = NULL;
7443 struct sk_buff *orig_skb = NULL;
7444 u8 status = 0, event, req_evt = 0;
7445 u16 opcode = HCI_OP_NOP;
7446
7447 if (skb->len < sizeof(*hdr)) {
7448 bt_dev_err(hdev, "Malformed HCI Event");
7449 goto done;
7450 }
7451
7452 kfree_skb(hdev->recv_event);
7453 hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7454
7455 event = hdr->evt;
7456 if (!event) {
7457 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7458 event);
7459 goto done;
7460 }
7461
7462 /* Only match event if command OGF is not for LE */
7463 if (hdev->req_skb &&
7464 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) != 0x08 &&
7465 hci_skb_event(hdev->req_skb) == event) {
7466 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->req_skb),
7467 status, &req_complete, &req_complete_skb);
7468 req_evt = event;
7469 }
7470
7471 /* If it looks like we might end up having to call
7472 * req_complete_skb, store a pristine copy of the skb since the
7473 * various handlers may modify the original one through
7474 * skb_pull() calls, etc.
7475 */
7476 if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7477 event == HCI_EV_CMD_COMPLETE)
7478 orig_skb = skb_clone(skb, GFP_KERNEL);
7479
7480 skb_pull(skb, HCI_EVENT_HDR_SIZE);
7481
7482 /* Store wake reason if we're suspended */
7483 hci_store_wake_reason(hdev, event, skb);
7484
7485 bt_dev_dbg(hdev, "event 0x%2.2x", event);
7486
7487 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7488 &req_complete_skb);
7489
7490 if (req_complete) {
7491 req_complete(hdev, status, opcode);
7492 } else if (req_complete_skb) {
7493 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7494 kfree_skb(orig_skb);
7495 orig_skb = NULL;
7496 }
7497 req_complete_skb(hdev, status, opcode, orig_skb);
7498 }
7499
7500 done:
7501 kfree_skb(orig_skb);
7502 kfree_skb(skb);
7503 hdev->stat.evt_rx++;
7504 }
7505