1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
4 Copyright 2023-2024 NXP
5
6 Written 2000,2001 by Maxim Krasnyansky <[email protected]>
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 <linux/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_debugfs.h"
37 #include "hci_codec.h"
38 #include "smp.h"
39 #include "msft.h"
40 #include "eir.h"
41
42 #define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
43 "\x00\x00\x00\x00\x00\x00\x00\x00"
44
45 /* Handle HCI Event packets */
46
hci_ev_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u8 ev,size_t len)47 static void *hci_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
48 u8 ev, size_t len)
49 {
50 void *data;
51
52 data = skb_pull_data(skb, len);
53 if (!data)
54 bt_dev_err(hdev, "Malformed Event: 0x%2.2x", ev);
55
56 return data;
57 }
58
hci_cc_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u16 op,size_t len)59 static void *hci_cc_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
60 u16 op, size_t len)
61 {
62 void *data;
63
64 data = skb_pull_data(skb, len);
65 if (!data)
66 bt_dev_err(hdev, "Malformed Command Complete: 0x%4.4x", op);
67
68 return data;
69 }
70
hci_le_ev_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u8 ev,size_t len)71 static void *hci_le_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
72 u8 ev, size_t len)
73 {
74 void *data;
75
76 data = skb_pull_data(skb, len);
77 if (!data)
78 bt_dev_err(hdev, "Malformed LE Event: 0x%2.2x", ev);
79
80 return data;
81 }
82
hci_cc_inquiry_cancel(struct hci_dev * hdev,void * data,struct sk_buff * skb)83 static u8 hci_cc_inquiry_cancel(struct hci_dev *hdev, void *data,
84 struct sk_buff *skb)
85 {
86 struct hci_ev_status *rp = data;
87
88 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
89
90 /* It is possible that we receive Inquiry Complete event right
91 * before we receive Inquiry Cancel Command Complete event, in
92 * which case the latter event should have status of Command
93 * Disallowed. This should not be treated as error, since
94 * we actually achieve what Inquiry Cancel wants to achieve,
95 * which is to end the last Inquiry session.
96 */
97 if (rp->status == HCI_ERROR_COMMAND_DISALLOWED && !test_bit(HCI_INQUIRY, &hdev->flags)) {
98 bt_dev_warn(hdev, "Ignoring error of Inquiry Cancel command");
99 rp->status = 0x00;
100 }
101
102 if (rp->status)
103 return rp->status;
104
105 clear_bit(HCI_INQUIRY, &hdev->flags);
106 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
107 wake_up_bit(&hdev->flags, HCI_INQUIRY);
108
109 hci_dev_lock(hdev);
110 /* Set discovery state to stopped if we're not doing LE active
111 * scanning.
112 */
113 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
114 hdev->le_scan_type != LE_SCAN_ACTIVE)
115 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
116 hci_dev_unlock(hdev);
117
118 return rp->status;
119 }
120
hci_cc_periodic_inq(struct hci_dev * hdev,void * data,struct sk_buff * skb)121 static u8 hci_cc_periodic_inq(struct hci_dev *hdev, void *data,
122 struct sk_buff *skb)
123 {
124 struct hci_ev_status *rp = data;
125
126 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
127
128 if (rp->status)
129 return rp->status;
130
131 hci_dev_set_flag(hdev, HCI_PERIODIC_INQ);
132
133 return rp->status;
134 }
135
hci_cc_exit_periodic_inq(struct hci_dev * hdev,void * data,struct sk_buff * skb)136 static u8 hci_cc_exit_periodic_inq(struct hci_dev *hdev, void *data,
137 struct sk_buff *skb)
138 {
139 struct hci_ev_status *rp = data;
140
141 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
142
143 if (rp->status)
144 return rp->status;
145
146 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);
147
148 return rp->status;
149 }
150
hci_cc_remote_name_req_cancel(struct hci_dev * hdev,void * data,struct sk_buff * skb)151 static u8 hci_cc_remote_name_req_cancel(struct hci_dev *hdev, void *data,
152 struct sk_buff *skb)
153 {
154 struct hci_rp_remote_name_req_cancel *rp = data;
155
156 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
157
158 return rp->status;
159 }
160
hci_cc_role_discovery(struct hci_dev * hdev,void * data,struct sk_buff * skb)161 static u8 hci_cc_role_discovery(struct hci_dev *hdev, void *data,
162 struct sk_buff *skb)
163 {
164 struct hci_rp_role_discovery *rp = data;
165 struct hci_conn *conn;
166
167 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
168
169 if (rp->status)
170 return rp->status;
171
172 hci_dev_lock(hdev);
173
174 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
175 if (conn)
176 conn->role = rp->role;
177
178 hci_dev_unlock(hdev);
179
180 return rp->status;
181 }
182
hci_cc_read_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)183 static u8 hci_cc_read_link_policy(struct hci_dev *hdev, void *data,
184 struct sk_buff *skb)
185 {
186 struct hci_rp_read_link_policy *rp = data;
187 struct hci_conn *conn;
188
189 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
190
191 if (rp->status)
192 return rp->status;
193
194 hci_dev_lock(hdev);
195
196 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
197 if (conn)
198 conn->link_policy = __le16_to_cpu(rp->policy);
199
200 hci_dev_unlock(hdev);
201
202 return rp->status;
203 }
204
hci_cc_write_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)205 static u8 hci_cc_write_link_policy(struct hci_dev *hdev, void *data,
206 struct sk_buff *skb)
207 {
208 struct hci_rp_write_link_policy *rp = data;
209 struct hci_conn *conn;
210 void *sent;
211
212 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
213
214 if (rp->status)
215 return rp->status;
216
217 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY);
218 if (!sent)
219 return rp->status;
220
221 hci_dev_lock(hdev);
222
223 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
224 if (conn)
225 conn->link_policy = get_unaligned_le16(sent + 2);
226
227 hci_dev_unlock(hdev);
228
229 return rp->status;
230 }
231
hci_cc_read_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)232 static u8 hci_cc_read_def_link_policy(struct hci_dev *hdev, void *data,
233 struct sk_buff *skb)
234 {
235 struct hci_rp_read_def_link_policy *rp = data;
236
237 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
238
239 if (rp->status)
240 return rp->status;
241
242 hdev->link_policy = __le16_to_cpu(rp->policy);
243
244 return rp->status;
245 }
246
hci_cc_write_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)247 static u8 hci_cc_write_def_link_policy(struct hci_dev *hdev, void *data,
248 struct sk_buff *skb)
249 {
250 struct hci_ev_status *rp = data;
251 void *sent;
252
253 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
254
255 if (rp->status)
256 return rp->status;
257
258 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY);
259 if (!sent)
260 return rp->status;
261
262 hdev->link_policy = get_unaligned_le16(sent);
263
264 return rp->status;
265 }
266
hci_cc_reset(struct hci_dev * hdev,void * data,struct sk_buff * skb)267 static u8 hci_cc_reset(struct hci_dev *hdev, void *data, struct sk_buff *skb)
268 {
269 struct hci_ev_status *rp = data;
270
271 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
272
273 clear_bit(HCI_RESET, &hdev->flags);
274
275 if (rp->status)
276 return rp->status;
277
278 /* Reset all non-persistent flags */
279 hci_dev_clear_volatile_flags(hdev);
280
281 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
282
283 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
284 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
285
286 memset(hdev->adv_data, 0, sizeof(hdev->adv_data));
287 hdev->adv_data_len = 0;
288
289 memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data));
290 hdev->scan_rsp_data_len = 0;
291
292 hdev->le_scan_type = LE_SCAN_PASSIVE;
293
294 hdev->ssp_debug_mode = 0;
295
296 hci_bdaddr_list_clear(&hdev->le_accept_list);
297 hci_bdaddr_list_clear(&hdev->le_resolv_list);
298
299 return rp->status;
300 }
301
hci_cc_read_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)302 static u8 hci_cc_read_stored_link_key(struct hci_dev *hdev, void *data,
303 struct sk_buff *skb)
304 {
305 struct hci_rp_read_stored_link_key *rp = data;
306 struct hci_cp_read_stored_link_key *sent;
307
308 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
309
310 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY);
311 if (!sent)
312 return rp->status;
313
314 if (!rp->status && sent->read_all == 0x01) {
315 hdev->stored_max_keys = le16_to_cpu(rp->max_keys);
316 hdev->stored_num_keys = le16_to_cpu(rp->num_keys);
317 }
318
319 return rp->status;
320 }
321
hci_cc_delete_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)322 static u8 hci_cc_delete_stored_link_key(struct hci_dev *hdev, void *data,
323 struct sk_buff *skb)
324 {
325 struct hci_rp_delete_stored_link_key *rp = data;
326 u16 num_keys;
327
328 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
329
330 if (rp->status)
331 return rp->status;
332
333 num_keys = le16_to_cpu(rp->num_keys);
334
335 if (num_keys <= hdev->stored_num_keys)
336 hdev->stored_num_keys -= num_keys;
337 else
338 hdev->stored_num_keys = 0;
339
340 return rp->status;
341 }
342
hci_cc_write_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)343 static u8 hci_cc_write_local_name(struct hci_dev *hdev, void *data,
344 struct sk_buff *skb)
345 {
346 struct hci_ev_status *rp = data;
347 void *sent;
348
349 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
350
351 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME);
352 if (!sent)
353 return rp->status;
354
355 hci_dev_lock(hdev);
356
357 if (hci_dev_test_flag(hdev, HCI_MGMT))
358 mgmt_set_local_name_complete(hdev, sent, rp->status);
359 else if (!rp->status)
360 memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH);
361
362 hci_dev_unlock(hdev);
363
364 return rp->status;
365 }
366
hci_cc_read_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)367 static u8 hci_cc_read_local_name(struct hci_dev *hdev, void *data,
368 struct sk_buff *skb)
369 {
370 struct hci_rp_read_local_name *rp = data;
371
372 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
373
374 if (rp->status)
375 return rp->status;
376
377 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
378 hci_dev_test_flag(hdev, HCI_CONFIG))
379 memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH);
380
381 return rp->status;
382 }
383
hci_cc_write_auth_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)384 static u8 hci_cc_write_auth_enable(struct hci_dev *hdev, void *data,
385 struct sk_buff *skb)
386 {
387 struct hci_ev_status *rp = data;
388 void *sent;
389
390 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
391
392 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE);
393 if (!sent)
394 return rp->status;
395
396 hci_dev_lock(hdev);
397
398 if (!rp->status) {
399 __u8 param = *((__u8 *) sent);
400
401 if (param == AUTH_ENABLED)
402 set_bit(HCI_AUTH, &hdev->flags);
403 else
404 clear_bit(HCI_AUTH, &hdev->flags);
405 }
406
407 if (hci_dev_test_flag(hdev, HCI_MGMT))
408 mgmt_auth_enable_complete(hdev, rp->status);
409
410 hci_dev_unlock(hdev);
411
412 return rp->status;
413 }
414
hci_cc_write_encrypt_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)415 static u8 hci_cc_write_encrypt_mode(struct hci_dev *hdev, void *data,
416 struct sk_buff *skb)
417 {
418 struct hci_ev_status *rp = data;
419 __u8 param;
420 void *sent;
421
422 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
423
424 if (rp->status)
425 return rp->status;
426
427 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE);
428 if (!sent)
429 return rp->status;
430
431 param = *((__u8 *) sent);
432
433 if (param)
434 set_bit(HCI_ENCRYPT, &hdev->flags);
435 else
436 clear_bit(HCI_ENCRYPT, &hdev->flags);
437
438 return rp->status;
439 }
440
hci_cc_write_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)441 static u8 hci_cc_write_scan_enable(struct hci_dev *hdev, void *data,
442 struct sk_buff *skb)
443 {
444 struct hci_ev_status *rp = data;
445 __u8 param;
446 void *sent;
447
448 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
449
450 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE);
451 if (!sent)
452 return rp->status;
453
454 param = *((__u8 *) sent);
455
456 hci_dev_lock(hdev);
457
458 if (rp->status) {
459 hdev->discov_timeout = 0;
460 goto done;
461 }
462
463 if (param & SCAN_INQUIRY)
464 set_bit(HCI_ISCAN, &hdev->flags);
465 else
466 clear_bit(HCI_ISCAN, &hdev->flags);
467
468 if (param & SCAN_PAGE)
469 set_bit(HCI_PSCAN, &hdev->flags);
470 else
471 clear_bit(HCI_PSCAN, &hdev->flags);
472
473 done:
474 hci_dev_unlock(hdev);
475
476 return rp->status;
477 }
478
hci_cc_set_event_filter(struct hci_dev * hdev,void * data,struct sk_buff * skb)479 static u8 hci_cc_set_event_filter(struct hci_dev *hdev, void *data,
480 struct sk_buff *skb)
481 {
482 struct hci_ev_status *rp = data;
483 struct hci_cp_set_event_filter *cp;
484 void *sent;
485
486 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
487
488 if (rp->status)
489 return rp->status;
490
491 sent = hci_sent_cmd_data(hdev, HCI_OP_SET_EVENT_FLT);
492 if (!sent)
493 return rp->status;
494
495 cp = (struct hci_cp_set_event_filter *)sent;
496
497 if (cp->flt_type == HCI_FLT_CLEAR_ALL)
498 hci_dev_clear_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
499 else
500 hci_dev_set_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
501
502 return rp->status;
503 }
504
hci_cc_read_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)505 static u8 hci_cc_read_class_of_dev(struct hci_dev *hdev, void *data,
506 struct sk_buff *skb)
507 {
508 struct hci_rp_read_class_of_dev *rp = data;
509
510 if (WARN_ON(!hdev))
511 return HCI_ERROR_UNSPECIFIED;
512
513 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
514
515 if (rp->status)
516 return rp->status;
517
518 memcpy(hdev->dev_class, rp->dev_class, 3);
519
520 bt_dev_dbg(hdev, "class 0x%.2x%.2x%.2x", hdev->dev_class[2],
521 hdev->dev_class[1], hdev->dev_class[0]);
522
523 return rp->status;
524 }
525
hci_cc_write_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)526 static u8 hci_cc_write_class_of_dev(struct hci_dev *hdev, void *data,
527 struct sk_buff *skb)
528 {
529 struct hci_ev_status *rp = data;
530 void *sent;
531
532 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
533
534 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV);
535 if (!sent)
536 return rp->status;
537
538 hci_dev_lock(hdev);
539
540 if (!rp->status)
541 memcpy(hdev->dev_class, sent, 3);
542
543 if (hci_dev_test_flag(hdev, HCI_MGMT))
544 mgmt_set_class_of_dev_complete(hdev, sent, rp->status);
545
546 hci_dev_unlock(hdev);
547
548 return rp->status;
549 }
550
hci_cc_read_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)551 static u8 hci_cc_read_voice_setting(struct hci_dev *hdev, void *data,
552 struct sk_buff *skb)
553 {
554 struct hci_rp_read_voice_setting *rp = data;
555 __u16 setting;
556
557 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
558
559 if (rp->status)
560 return rp->status;
561
562 setting = __le16_to_cpu(rp->voice_setting);
563
564 if (hdev->voice_setting == setting)
565 return rp->status;
566
567 hdev->voice_setting = setting;
568
569 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
570
571 if (hdev->notify)
572 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
573
574 return rp->status;
575 }
576
hci_cc_write_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)577 static u8 hci_cc_write_voice_setting(struct hci_dev *hdev, void *data,
578 struct sk_buff *skb)
579 {
580 struct hci_ev_status *rp = data;
581 __u16 setting;
582 void *sent;
583
584 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
585
586 if (rp->status)
587 return rp->status;
588
589 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING);
590 if (!sent)
591 return rp->status;
592
593 setting = get_unaligned_le16(sent);
594
595 if (hdev->voice_setting == setting)
596 return rp->status;
597
598 hdev->voice_setting = setting;
599
600 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
601
602 if (hdev->notify)
603 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
604
605 return rp->status;
606 }
607
hci_cc_read_num_supported_iac(struct hci_dev * hdev,void * data,struct sk_buff * skb)608 static u8 hci_cc_read_num_supported_iac(struct hci_dev *hdev, void *data,
609 struct sk_buff *skb)
610 {
611 struct hci_rp_read_num_supported_iac *rp = data;
612
613 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
614
615 if (rp->status)
616 return rp->status;
617
618 hdev->num_iac = rp->num_iac;
619
620 bt_dev_dbg(hdev, "num iac %d", hdev->num_iac);
621
622 return rp->status;
623 }
624
hci_cc_write_ssp_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)625 static u8 hci_cc_write_ssp_mode(struct hci_dev *hdev, void *data,
626 struct sk_buff *skb)
627 {
628 struct hci_ev_status *rp = data;
629 struct hci_cp_write_ssp_mode *sent;
630
631 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
632
633 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE);
634 if (!sent)
635 return rp->status;
636
637 hci_dev_lock(hdev);
638
639 if (!rp->status) {
640 if (sent->mode)
641 hdev->features[1][0] |= LMP_HOST_SSP;
642 else
643 hdev->features[1][0] &= ~LMP_HOST_SSP;
644 }
645
646 if (!rp->status) {
647 if (sent->mode)
648 hci_dev_set_flag(hdev, HCI_SSP_ENABLED);
649 else
650 hci_dev_clear_flag(hdev, HCI_SSP_ENABLED);
651 }
652
653 hci_dev_unlock(hdev);
654
655 return rp->status;
656 }
657
hci_cc_write_sc_support(struct hci_dev * hdev,void * data,struct sk_buff * skb)658 static u8 hci_cc_write_sc_support(struct hci_dev *hdev, void *data,
659 struct sk_buff *skb)
660 {
661 struct hci_ev_status *rp = data;
662 struct hci_cp_write_sc_support *sent;
663
664 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
665
666 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT);
667 if (!sent)
668 return rp->status;
669
670 hci_dev_lock(hdev);
671
672 if (!rp->status) {
673 if (sent->support)
674 hdev->features[1][0] |= LMP_HOST_SC;
675 else
676 hdev->features[1][0] &= ~LMP_HOST_SC;
677 }
678
679 if (!hci_dev_test_flag(hdev, HCI_MGMT) && !rp->status) {
680 if (sent->support)
681 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
682 else
683 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
684 }
685
686 hci_dev_unlock(hdev);
687
688 return rp->status;
689 }
690
hci_cc_read_local_version(struct hci_dev * hdev,void * data,struct sk_buff * skb)691 static u8 hci_cc_read_local_version(struct hci_dev *hdev, void *data,
692 struct sk_buff *skb)
693 {
694 struct hci_rp_read_local_version *rp = data;
695
696 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
697
698 if (rp->status)
699 return rp->status;
700
701 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
702 hci_dev_test_flag(hdev, HCI_CONFIG)) {
703 hdev->hci_ver = rp->hci_ver;
704 hdev->hci_rev = __le16_to_cpu(rp->hci_rev);
705 hdev->lmp_ver = rp->lmp_ver;
706 hdev->manufacturer = __le16_to_cpu(rp->manufacturer);
707 hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver);
708 }
709
710 return rp->status;
711 }
712
hci_cc_read_enc_key_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)713 static u8 hci_cc_read_enc_key_size(struct hci_dev *hdev, void *data,
714 struct sk_buff *skb)
715 {
716 struct hci_rp_read_enc_key_size *rp = data;
717 struct hci_conn *conn;
718 u16 handle;
719 u8 status = rp->status;
720
721 bt_dev_dbg(hdev, "status 0x%2.2x", status);
722
723 handle = le16_to_cpu(rp->handle);
724
725 hci_dev_lock(hdev);
726
727 conn = hci_conn_hash_lookup_handle(hdev, handle);
728 if (!conn) {
729 status = 0xFF;
730 goto done;
731 }
732
733 /* While unexpected, the read_enc_key_size command may fail. The most
734 * secure approach is to then assume the key size is 0 to force a
735 * disconnection.
736 */
737 if (status) {
738 bt_dev_err(hdev, "failed to read key size for handle %u",
739 handle);
740 conn->enc_key_size = 0;
741 } else {
742 conn->enc_key_size = rp->key_size;
743 status = 0;
744
745 if (conn->enc_key_size < hdev->min_enc_key_size) {
746 /* As slave role, the conn->state has been set to
747 * BT_CONNECTED and l2cap conn req might not be received
748 * yet, at this moment the l2cap layer almost does
749 * nothing with the non-zero status.
750 * So we also clear encrypt related bits, and then the
751 * handler of l2cap conn req will get the right secure
752 * state at a later time.
753 */
754 status = HCI_ERROR_AUTH_FAILURE;
755 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
756 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
757 }
758 }
759
760 hci_encrypt_cfm(conn, status);
761
762 done:
763 hci_dev_unlock(hdev);
764
765 return status;
766 }
767
hci_cc_read_local_commands(struct hci_dev * hdev,void * data,struct sk_buff * skb)768 static u8 hci_cc_read_local_commands(struct hci_dev *hdev, void *data,
769 struct sk_buff *skb)
770 {
771 struct hci_rp_read_local_commands *rp = data;
772
773 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
774
775 if (rp->status)
776 return rp->status;
777
778 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
779 hci_dev_test_flag(hdev, HCI_CONFIG))
780 memcpy(hdev->commands, rp->commands, sizeof(hdev->commands));
781
782 return rp->status;
783 }
784
hci_cc_read_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)785 static u8 hci_cc_read_auth_payload_timeout(struct hci_dev *hdev, void *data,
786 struct sk_buff *skb)
787 {
788 struct hci_rp_read_auth_payload_to *rp = data;
789 struct hci_conn *conn;
790
791 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
792
793 if (rp->status)
794 return rp->status;
795
796 hci_dev_lock(hdev);
797
798 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
799 if (conn)
800 conn->auth_payload_timeout = __le16_to_cpu(rp->timeout);
801
802 hci_dev_unlock(hdev);
803
804 return rp->status;
805 }
806
hci_cc_write_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)807 static u8 hci_cc_write_auth_payload_timeout(struct hci_dev *hdev, void *data,
808 struct sk_buff *skb)
809 {
810 struct hci_rp_write_auth_payload_to *rp = data;
811 struct hci_conn *conn;
812 void *sent;
813
814 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
815
816 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO);
817 if (!sent)
818 return rp->status;
819
820 hci_dev_lock(hdev);
821
822 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
823 if (!conn) {
824 rp->status = 0xff;
825 goto unlock;
826 }
827
828 if (!rp->status)
829 conn->auth_payload_timeout = get_unaligned_le16(sent + 2);
830
831 unlock:
832 hci_dev_unlock(hdev);
833
834 return rp->status;
835 }
836
hci_cc_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)837 static u8 hci_cc_read_local_features(struct hci_dev *hdev, void *data,
838 struct sk_buff *skb)
839 {
840 struct hci_rp_read_local_features *rp = data;
841
842 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
843
844 if (rp->status)
845 return rp->status;
846
847 memcpy(hdev->features, rp->features, 8);
848
849 /* Adjust default settings according to features
850 * supported by device. */
851
852 if (hdev->features[0][0] & LMP_3SLOT)
853 hdev->pkt_type |= (HCI_DM3 | HCI_DH3);
854
855 if (hdev->features[0][0] & LMP_5SLOT)
856 hdev->pkt_type |= (HCI_DM5 | HCI_DH5);
857
858 if (hdev->features[0][1] & LMP_HV2) {
859 hdev->pkt_type |= (HCI_HV2);
860 hdev->esco_type |= (ESCO_HV2);
861 }
862
863 if (hdev->features[0][1] & LMP_HV3) {
864 hdev->pkt_type |= (HCI_HV3);
865 hdev->esco_type |= (ESCO_HV3);
866 }
867
868 if (lmp_esco_capable(hdev))
869 hdev->esco_type |= (ESCO_EV3);
870
871 if (hdev->features[0][4] & LMP_EV4)
872 hdev->esco_type |= (ESCO_EV4);
873
874 if (hdev->features[0][4] & LMP_EV5)
875 hdev->esco_type |= (ESCO_EV5);
876
877 if (hdev->features[0][5] & LMP_EDR_ESCO_2M)
878 hdev->esco_type |= (ESCO_2EV3);
879
880 if (hdev->features[0][5] & LMP_EDR_ESCO_3M)
881 hdev->esco_type |= (ESCO_3EV3);
882
883 if (hdev->features[0][5] & LMP_EDR_3S_ESCO)
884 hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5);
885
886 return rp->status;
887 }
888
hci_cc_read_local_ext_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)889 static u8 hci_cc_read_local_ext_features(struct hci_dev *hdev, void *data,
890 struct sk_buff *skb)
891 {
892 struct hci_rp_read_local_ext_features *rp = data;
893
894 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
895
896 if (rp->status)
897 return rp->status;
898
899 if (hdev->max_page < rp->max_page) {
900 if (test_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2,
901 &hdev->quirks))
902 bt_dev_warn(hdev, "broken local ext features page 2");
903 else
904 hdev->max_page = rp->max_page;
905 }
906
907 if (rp->page < HCI_MAX_PAGES)
908 memcpy(hdev->features[rp->page], rp->features, 8);
909
910 return rp->status;
911 }
912
hci_cc_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)913 static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data,
914 struct sk_buff *skb)
915 {
916 struct hci_rp_read_buffer_size *rp = data;
917
918 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
919
920 if (rp->status)
921 return rp->status;
922
923 hdev->acl_mtu = __le16_to_cpu(rp->acl_mtu);
924 hdev->sco_mtu = rp->sco_mtu;
925 hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt);
926 hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt);
927
928 if (test_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks)) {
929 hdev->sco_mtu = 64;
930 hdev->sco_pkts = 8;
931 }
932
933 hdev->acl_cnt = hdev->acl_pkts;
934 hdev->sco_cnt = hdev->sco_pkts;
935
936 BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu,
937 hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts);
938
939 if (!hdev->acl_mtu || !hdev->acl_pkts)
940 return HCI_ERROR_INVALID_PARAMETERS;
941
942 return rp->status;
943 }
944
hci_cc_read_bd_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)945 static u8 hci_cc_read_bd_addr(struct hci_dev *hdev, void *data,
946 struct sk_buff *skb)
947 {
948 struct hci_rp_read_bd_addr *rp = data;
949
950 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
951
952 if (rp->status)
953 return rp->status;
954
955 if (test_bit(HCI_INIT, &hdev->flags))
956 bacpy(&hdev->bdaddr, &rp->bdaddr);
957
958 if (hci_dev_test_flag(hdev, HCI_SETUP))
959 bacpy(&hdev->setup_addr, &rp->bdaddr);
960
961 return rp->status;
962 }
963
hci_cc_read_local_pairing_opts(struct hci_dev * hdev,void * data,struct sk_buff * skb)964 static u8 hci_cc_read_local_pairing_opts(struct hci_dev *hdev, void *data,
965 struct sk_buff *skb)
966 {
967 struct hci_rp_read_local_pairing_opts *rp = data;
968
969 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
970
971 if (rp->status)
972 return rp->status;
973
974 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
975 hci_dev_test_flag(hdev, HCI_CONFIG)) {
976 hdev->pairing_opts = rp->pairing_opts;
977 hdev->max_enc_key_size = rp->max_key_size;
978 }
979
980 return rp->status;
981 }
982
hci_cc_read_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)983 static u8 hci_cc_read_page_scan_activity(struct hci_dev *hdev, void *data,
984 struct sk_buff *skb)
985 {
986 struct hci_rp_read_page_scan_activity *rp = data;
987
988 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
989
990 if (rp->status)
991 return rp->status;
992
993 if (test_bit(HCI_INIT, &hdev->flags)) {
994 hdev->page_scan_interval = __le16_to_cpu(rp->interval);
995 hdev->page_scan_window = __le16_to_cpu(rp->window);
996 }
997
998 return rp->status;
999 }
1000
hci_cc_write_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)1001 static u8 hci_cc_write_page_scan_activity(struct hci_dev *hdev, void *data,
1002 struct sk_buff *skb)
1003 {
1004 struct hci_ev_status *rp = data;
1005 struct hci_cp_write_page_scan_activity *sent;
1006
1007 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1008
1009 if (rp->status)
1010 return rp->status;
1011
1012 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY);
1013 if (!sent)
1014 return rp->status;
1015
1016 hdev->page_scan_interval = __le16_to_cpu(sent->interval);
1017 hdev->page_scan_window = __le16_to_cpu(sent->window);
1018
1019 return rp->status;
1020 }
1021
hci_cc_read_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1022 static u8 hci_cc_read_page_scan_type(struct hci_dev *hdev, void *data,
1023 struct sk_buff *skb)
1024 {
1025 struct hci_rp_read_page_scan_type *rp = data;
1026
1027 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1028
1029 if (rp->status)
1030 return rp->status;
1031
1032 if (test_bit(HCI_INIT, &hdev->flags))
1033 hdev->page_scan_type = rp->type;
1034
1035 return rp->status;
1036 }
1037
hci_cc_write_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1038 static u8 hci_cc_write_page_scan_type(struct hci_dev *hdev, void *data,
1039 struct sk_buff *skb)
1040 {
1041 struct hci_ev_status *rp = data;
1042 u8 *type;
1043
1044 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1045
1046 if (rp->status)
1047 return rp->status;
1048
1049 type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE);
1050 if (type)
1051 hdev->page_scan_type = *type;
1052
1053 return rp->status;
1054 }
1055
hci_cc_read_clock(struct hci_dev * hdev,void * data,struct sk_buff * skb)1056 static u8 hci_cc_read_clock(struct hci_dev *hdev, void *data,
1057 struct sk_buff *skb)
1058 {
1059 struct hci_rp_read_clock *rp = data;
1060 struct hci_cp_read_clock *cp;
1061 struct hci_conn *conn;
1062
1063 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1064
1065 if (rp->status)
1066 return rp->status;
1067
1068 hci_dev_lock(hdev);
1069
1070 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
1071 if (!cp)
1072 goto unlock;
1073
1074 if (cp->which == 0x00) {
1075 hdev->clock = le32_to_cpu(rp->clock);
1076 goto unlock;
1077 }
1078
1079 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
1080 if (conn) {
1081 conn->clock = le32_to_cpu(rp->clock);
1082 conn->clock_accuracy = le16_to_cpu(rp->accuracy);
1083 }
1084
1085 unlock:
1086 hci_dev_unlock(hdev);
1087 return rp->status;
1088 }
1089
hci_cc_read_inq_rsp_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1090 static u8 hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev, void *data,
1091 struct sk_buff *skb)
1092 {
1093 struct hci_rp_read_inq_rsp_tx_power *rp = data;
1094
1095 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1096
1097 if (rp->status)
1098 return rp->status;
1099
1100 hdev->inq_tx_power = rp->tx_power;
1101
1102 return rp->status;
1103 }
1104
hci_cc_read_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1105 static u8 hci_cc_read_def_err_data_reporting(struct hci_dev *hdev, void *data,
1106 struct sk_buff *skb)
1107 {
1108 struct hci_rp_read_def_err_data_reporting *rp = data;
1109
1110 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1111
1112 if (rp->status)
1113 return rp->status;
1114
1115 hdev->err_data_reporting = rp->err_data_reporting;
1116
1117 return rp->status;
1118 }
1119
hci_cc_write_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1120 static u8 hci_cc_write_def_err_data_reporting(struct hci_dev *hdev, void *data,
1121 struct sk_buff *skb)
1122 {
1123 struct hci_ev_status *rp = data;
1124 struct hci_cp_write_def_err_data_reporting *cp;
1125
1126 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1127
1128 if (rp->status)
1129 return rp->status;
1130
1131 cp = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING);
1132 if (!cp)
1133 return rp->status;
1134
1135 hdev->err_data_reporting = cp->err_data_reporting;
1136
1137 return rp->status;
1138 }
1139
hci_cc_pin_code_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1140 static u8 hci_cc_pin_code_reply(struct hci_dev *hdev, void *data,
1141 struct sk_buff *skb)
1142 {
1143 struct hci_rp_pin_code_reply *rp = data;
1144 struct hci_cp_pin_code_reply *cp;
1145 struct hci_conn *conn;
1146
1147 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1148
1149 hci_dev_lock(hdev);
1150
1151 if (hci_dev_test_flag(hdev, HCI_MGMT))
1152 mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status);
1153
1154 if (rp->status)
1155 goto unlock;
1156
1157 cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY);
1158 if (!cp)
1159 goto unlock;
1160
1161 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
1162 if (conn)
1163 conn->pin_length = cp->pin_len;
1164
1165 unlock:
1166 hci_dev_unlock(hdev);
1167 return rp->status;
1168 }
1169
hci_cc_pin_code_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1170 static u8 hci_cc_pin_code_neg_reply(struct hci_dev *hdev, void *data,
1171 struct sk_buff *skb)
1172 {
1173 struct hci_rp_pin_code_neg_reply *rp = data;
1174
1175 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1176
1177 hci_dev_lock(hdev);
1178
1179 if (hci_dev_test_flag(hdev, HCI_MGMT))
1180 mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr,
1181 rp->status);
1182
1183 hci_dev_unlock(hdev);
1184
1185 return rp->status;
1186 }
1187
hci_cc_le_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1188 static u8 hci_cc_le_read_buffer_size(struct hci_dev *hdev, void *data,
1189 struct sk_buff *skb)
1190 {
1191 struct hci_rp_le_read_buffer_size *rp = data;
1192
1193 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1194
1195 if (rp->status)
1196 return rp->status;
1197
1198 hdev->le_mtu = __le16_to_cpu(rp->le_mtu);
1199 hdev->le_pkts = rp->le_max_pkt;
1200
1201 hdev->le_cnt = hdev->le_pkts;
1202
1203 BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts);
1204
1205 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
1206 return HCI_ERROR_INVALID_PARAMETERS;
1207
1208 return rp->status;
1209 }
1210
hci_cc_le_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)1211 static u8 hci_cc_le_read_local_features(struct hci_dev *hdev, void *data,
1212 struct sk_buff *skb)
1213 {
1214 struct hci_rp_le_read_local_features *rp = data;
1215
1216 BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1217
1218 if (rp->status)
1219 return rp->status;
1220
1221 memcpy(hdev->le_features, rp->features, 8);
1222
1223 return rp->status;
1224 }
1225
hci_cc_le_read_adv_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1226 static u8 hci_cc_le_read_adv_tx_power(struct hci_dev *hdev, void *data,
1227 struct sk_buff *skb)
1228 {
1229 struct hci_rp_le_read_adv_tx_power *rp = data;
1230
1231 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1232
1233 if (rp->status)
1234 return rp->status;
1235
1236 hdev->adv_tx_power = rp->tx_power;
1237
1238 return rp->status;
1239 }
1240
hci_cc_user_confirm_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1241 static u8 hci_cc_user_confirm_reply(struct hci_dev *hdev, void *data,
1242 struct sk_buff *skb)
1243 {
1244 struct hci_rp_user_confirm_reply *rp = data;
1245
1246 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1247
1248 hci_dev_lock(hdev);
1249
1250 if (hci_dev_test_flag(hdev, HCI_MGMT))
1251 mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0,
1252 rp->status);
1253
1254 hci_dev_unlock(hdev);
1255
1256 return rp->status;
1257 }
1258
hci_cc_user_confirm_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1259 static u8 hci_cc_user_confirm_neg_reply(struct hci_dev *hdev, void *data,
1260 struct sk_buff *skb)
1261 {
1262 struct hci_rp_user_confirm_reply *rp = data;
1263
1264 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1265
1266 hci_dev_lock(hdev);
1267
1268 if (hci_dev_test_flag(hdev, HCI_MGMT))
1269 mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr,
1270 ACL_LINK, 0, rp->status);
1271
1272 hci_dev_unlock(hdev);
1273
1274 return rp->status;
1275 }
1276
hci_cc_user_passkey_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1277 static u8 hci_cc_user_passkey_reply(struct hci_dev *hdev, void *data,
1278 struct sk_buff *skb)
1279 {
1280 struct hci_rp_user_confirm_reply *rp = data;
1281
1282 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1283
1284 hci_dev_lock(hdev);
1285
1286 if (hci_dev_test_flag(hdev, HCI_MGMT))
1287 mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK,
1288 0, rp->status);
1289
1290 hci_dev_unlock(hdev);
1291
1292 return rp->status;
1293 }
1294
hci_cc_user_passkey_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1295 static u8 hci_cc_user_passkey_neg_reply(struct hci_dev *hdev, void *data,
1296 struct sk_buff *skb)
1297 {
1298 struct hci_rp_user_confirm_reply *rp = data;
1299
1300 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1301
1302 hci_dev_lock(hdev);
1303
1304 if (hci_dev_test_flag(hdev, HCI_MGMT))
1305 mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr,
1306 ACL_LINK, 0, rp->status);
1307
1308 hci_dev_unlock(hdev);
1309
1310 return rp->status;
1311 }
1312
hci_cc_read_local_oob_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1313 static u8 hci_cc_read_local_oob_data(struct hci_dev *hdev, void *data,
1314 struct sk_buff *skb)
1315 {
1316 struct hci_rp_read_local_oob_data *rp = data;
1317
1318 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1319
1320 return rp->status;
1321 }
1322
hci_cc_read_local_oob_ext_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1323 static u8 hci_cc_read_local_oob_ext_data(struct hci_dev *hdev, void *data,
1324 struct sk_buff *skb)
1325 {
1326 struct hci_rp_read_local_oob_ext_data *rp = data;
1327
1328 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1329
1330 return rp->status;
1331 }
1332
hci_cc_le_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1333 static u8 hci_cc_le_set_random_addr(struct hci_dev *hdev, void *data,
1334 struct sk_buff *skb)
1335 {
1336 struct hci_ev_status *rp = data;
1337 bdaddr_t *sent;
1338
1339 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1340
1341 if (rp->status)
1342 return rp->status;
1343
1344 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR);
1345 if (!sent)
1346 return rp->status;
1347
1348 hci_dev_lock(hdev);
1349
1350 bacpy(&hdev->random_addr, sent);
1351
1352 if (!bacmp(&hdev->rpa, sent)) {
1353 hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED);
1354 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired,
1355 secs_to_jiffies(hdev->rpa_timeout));
1356 }
1357
1358 hci_dev_unlock(hdev);
1359
1360 return rp->status;
1361 }
1362
hci_cc_le_set_default_phy(struct hci_dev * hdev,void * data,struct sk_buff * skb)1363 static u8 hci_cc_le_set_default_phy(struct hci_dev *hdev, void *data,
1364 struct sk_buff *skb)
1365 {
1366 struct hci_ev_status *rp = data;
1367 struct hci_cp_le_set_default_phy *cp;
1368
1369 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1370
1371 if (rp->status)
1372 return rp->status;
1373
1374 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY);
1375 if (!cp)
1376 return rp->status;
1377
1378 hci_dev_lock(hdev);
1379
1380 hdev->le_tx_def_phys = cp->tx_phys;
1381 hdev->le_rx_def_phys = cp->rx_phys;
1382
1383 hci_dev_unlock(hdev);
1384
1385 return rp->status;
1386 }
1387
hci_cc_le_set_adv_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1388 static u8 hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, void *data,
1389 struct sk_buff *skb)
1390 {
1391 struct hci_ev_status *rp = data;
1392 struct hci_cp_le_set_adv_set_rand_addr *cp;
1393 struct adv_info *adv;
1394
1395 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1396
1397 if (rp->status)
1398 return rp->status;
1399
1400 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR);
1401 /* Update only in case the adv instance since handle 0x00 shall be using
1402 * HCI_OP_LE_SET_RANDOM_ADDR since that allows both extended and
1403 * non-extended adverting.
1404 */
1405 if (!cp || !cp->handle)
1406 return rp->status;
1407
1408 hci_dev_lock(hdev);
1409
1410 adv = hci_find_adv_instance(hdev, cp->handle);
1411 if (adv) {
1412 bacpy(&adv->random_addr, &cp->bdaddr);
1413 if (!bacmp(&hdev->rpa, &cp->bdaddr)) {
1414 adv->rpa_expired = false;
1415 queue_delayed_work(hdev->workqueue,
1416 &adv->rpa_expired_cb,
1417 secs_to_jiffies(hdev->rpa_timeout));
1418 }
1419 }
1420
1421 hci_dev_unlock(hdev);
1422
1423 return rp->status;
1424 }
1425
hci_cc_le_remove_adv_set(struct hci_dev * hdev,void * data,struct sk_buff * skb)1426 static u8 hci_cc_le_remove_adv_set(struct hci_dev *hdev, void *data,
1427 struct sk_buff *skb)
1428 {
1429 struct hci_ev_status *rp = data;
1430 u8 *instance;
1431 int err;
1432
1433 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1434
1435 if (rp->status)
1436 return rp->status;
1437
1438 instance = hci_sent_cmd_data(hdev, HCI_OP_LE_REMOVE_ADV_SET);
1439 if (!instance)
1440 return rp->status;
1441
1442 hci_dev_lock(hdev);
1443
1444 err = hci_remove_adv_instance(hdev, *instance);
1445 if (!err)
1446 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), hdev,
1447 *instance);
1448
1449 hci_dev_unlock(hdev);
1450
1451 return rp->status;
1452 }
1453
hci_cc_le_clear_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1454 static u8 hci_cc_le_clear_adv_sets(struct hci_dev *hdev, void *data,
1455 struct sk_buff *skb)
1456 {
1457 struct hci_ev_status *rp = data;
1458 struct adv_info *adv, *n;
1459 int err;
1460
1461 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1462
1463 if (rp->status)
1464 return rp->status;
1465
1466 if (!hci_sent_cmd_data(hdev, HCI_OP_LE_CLEAR_ADV_SETS))
1467 return rp->status;
1468
1469 hci_dev_lock(hdev);
1470
1471 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1472 u8 instance = adv->instance;
1473
1474 err = hci_remove_adv_instance(hdev, instance);
1475 if (!err)
1476 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd),
1477 hdev, instance);
1478 }
1479
1480 hci_dev_unlock(hdev);
1481
1482 return rp->status;
1483 }
1484
hci_cc_le_read_transmit_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1485 static u8 hci_cc_le_read_transmit_power(struct hci_dev *hdev, void *data,
1486 struct sk_buff *skb)
1487 {
1488 struct hci_rp_le_read_transmit_power *rp = data;
1489
1490 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1491
1492 if (rp->status)
1493 return rp->status;
1494
1495 hdev->min_le_tx_power = rp->min_le_tx_power;
1496 hdev->max_le_tx_power = rp->max_le_tx_power;
1497
1498 return rp->status;
1499 }
1500
hci_cc_le_set_privacy_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)1501 static u8 hci_cc_le_set_privacy_mode(struct hci_dev *hdev, void *data,
1502 struct sk_buff *skb)
1503 {
1504 struct hci_ev_status *rp = data;
1505 struct hci_cp_le_set_privacy_mode *cp;
1506 struct hci_conn_params *params;
1507
1508 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1509
1510 if (rp->status)
1511 return rp->status;
1512
1513 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PRIVACY_MODE);
1514 if (!cp)
1515 return rp->status;
1516
1517 hci_dev_lock(hdev);
1518
1519 params = hci_conn_params_lookup(hdev, &cp->bdaddr, cp->bdaddr_type);
1520 if (params)
1521 WRITE_ONCE(params->privacy_mode, cp->mode);
1522
1523 hci_dev_unlock(hdev);
1524
1525 return rp->status;
1526 }
1527
hci_cc_le_set_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1528 static u8 hci_cc_le_set_adv_enable(struct hci_dev *hdev, void *data,
1529 struct sk_buff *skb)
1530 {
1531 struct hci_ev_status *rp = data;
1532 __u8 *sent;
1533
1534 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1535
1536 if (rp->status)
1537 return rp->status;
1538
1539 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE);
1540 if (!sent)
1541 return rp->status;
1542
1543 hci_dev_lock(hdev);
1544
1545 /* If we're doing connection initiation as peripheral. Set a
1546 * timeout in case something goes wrong.
1547 */
1548 if (*sent) {
1549 struct hci_conn *conn;
1550
1551 hci_dev_set_flag(hdev, HCI_LE_ADV);
1552
1553 conn = hci_lookup_le_connect(hdev);
1554 if (conn)
1555 queue_delayed_work(hdev->workqueue,
1556 &conn->le_conn_timeout,
1557 conn->conn_timeout);
1558 } else {
1559 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1560 }
1561
1562 hci_dev_unlock(hdev);
1563
1564 return rp->status;
1565 }
1566
hci_cc_le_set_ext_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1567 static u8 hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev, void *data,
1568 struct sk_buff *skb)
1569 {
1570 struct hci_cp_le_set_ext_adv_enable *cp;
1571 struct hci_cp_ext_adv_set *set;
1572 struct adv_info *adv = NULL, *n;
1573 struct hci_ev_status *rp = data;
1574
1575 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1576
1577 if (rp->status)
1578 return rp->status;
1579
1580 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE);
1581 if (!cp)
1582 return rp->status;
1583
1584 set = (void *)cp->data;
1585
1586 hci_dev_lock(hdev);
1587
1588 if (cp->num_of_sets)
1589 adv = hci_find_adv_instance(hdev, set->handle);
1590
1591 if (cp->enable) {
1592 struct hci_conn *conn;
1593
1594 hci_dev_set_flag(hdev, HCI_LE_ADV);
1595
1596 if (adv && !adv->periodic)
1597 adv->enabled = true;
1598
1599 conn = hci_lookup_le_connect(hdev);
1600 if (conn)
1601 queue_delayed_work(hdev->workqueue,
1602 &conn->le_conn_timeout,
1603 conn->conn_timeout);
1604 } else {
1605 if (cp->num_of_sets) {
1606 if (adv)
1607 adv->enabled = false;
1608
1609 /* If just one instance was disabled check if there are
1610 * any other instance enabled before clearing HCI_LE_ADV
1611 */
1612 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1613 list) {
1614 if (adv->enabled)
1615 goto unlock;
1616 }
1617 } else {
1618 /* All instances shall be considered disabled */
1619 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1620 list)
1621 adv->enabled = false;
1622 }
1623
1624 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1625 }
1626
1627 unlock:
1628 hci_dev_unlock(hdev);
1629 return rp->status;
1630 }
1631
hci_cc_le_set_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1632 static u8 hci_cc_le_set_scan_param(struct hci_dev *hdev, void *data,
1633 struct sk_buff *skb)
1634 {
1635 struct hci_cp_le_set_scan_param *cp;
1636 struct hci_ev_status *rp = data;
1637
1638 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1639
1640 if (rp->status)
1641 return rp->status;
1642
1643 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM);
1644 if (!cp)
1645 return rp->status;
1646
1647 hci_dev_lock(hdev);
1648
1649 hdev->le_scan_type = cp->type;
1650
1651 hci_dev_unlock(hdev);
1652
1653 return rp->status;
1654 }
1655
hci_cc_le_set_ext_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1656 static u8 hci_cc_le_set_ext_scan_param(struct hci_dev *hdev, void *data,
1657 struct sk_buff *skb)
1658 {
1659 struct hci_cp_le_set_ext_scan_params *cp;
1660 struct hci_ev_status *rp = data;
1661 struct hci_cp_le_scan_phy_params *phy_param;
1662
1663 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1664
1665 if (rp->status)
1666 return rp->status;
1667
1668 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS);
1669 if (!cp)
1670 return rp->status;
1671
1672 phy_param = (void *)cp->data;
1673
1674 hci_dev_lock(hdev);
1675
1676 hdev->le_scan_type = phy_param->type;
1677
1678 hci_dev_unlock(hdev);
1679
1680 return rp->status;
1681 }
1682
has_pending_adv_report(struct hci_dev * hdev)1683 static bool has_pending_adv_report(struct hci_dev *hdev)
1684 {
1685 struct discovery_state *d = &hdev->discovery;
1686
1687 return bacmp(&d->last_adv_addr, BDADDR_ANY);
1688 }
1689
clear_pending_adv_report(struct hci_dev * hdev)1690 static void clear_pending_adv_report(struct hci_dev *hdev)
1691 {
1692 struct discovery_state *d = &hdev->discovery;
1693
1694 bacpy(&d->last_adv_addr, BDADDR_ANY);
1695 d->last_adv_data_len = 0;
1696 }
1697
store_pending_adv_report(struct hci_dev * hdev,bdaddr_t * bdaddr,u8 bdaddr_type,s8 rssi,u32 flags,u8 * data,u8 len)1698 static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr,
1699 u8 bdaddr_type, s8 rssi, u32 flags,
1700 u8 *data, u8 len)
1701 {
1702 struct discovery_state *d = &hdev->discovery;
1703
1704 if (len > max_adv_len(hdev))
1705 return;
1706
1707 bacpy(&d->last_adv_addr, bdaddr);
1708 d->last_adv_addr_type = bdaddr_type;
1709 d->last_adv_rssi = rssi;
1710 d->last_adv_flags = flags;
1711 memcpy(d->last_adv_data, data, len);
1712 d->last_adv_data_len = len;
1713 }
1714
le_set_scan_enable_complete(struct hci_dev * hdev,u8 enable)1715 static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable)
1716 {
1717 hci_dev_lock(hdev);
1718
1719 switch (enable) {
1720 case LE_SCAN_ENABLE:
1721 hci_dev_set_flag(hdev, HCI_LE_SCAN);
1722 if (hdev->le_scan_type == LE_SCAN_ACTIVE) {
1723 clear_pending_adv_report(hdev);
1724 hci_discovery_set_state(hdev, DISCOVERY_FINDING);
1725 }
1726 break;
1727
1728 case LE_SCAN_DISABLE:
1729 /* We do this here instead of when setting DISCOVERY_STOPPED
1730 * since the latter would potentially require waiting for
1731 * inquiry to stop too.
1732 */
1733 if (has_pending_adv_report(hdev)) {
1734 struct discovery_state *d = &hdev->discovery;
1735
1736 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
1737 d->last_adv_addr_type, NULL,
1738 d->last_adv_rssi, d->last_adv_flags,
1739 d->last_adv_data,
1740 d->last_adv_data_len, NULL, 0, 0);
1741 }
1742
1743 /* Cancel this timer so that we don't try to disable scanning
1744 * when it's already disabled.
1745 */
1746 cancel_delayed_work(&hdev->le_scan_disable);
1747
1748 hci_dev_clear_flag(hdev, HCI_LE_SCAN);
1749
1750 /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we
1751 * interrupted scanning due to a connect request. Mark
1752 * therefore discovery as stopped.
1753 */
1754 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED))
1755 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1756 else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) &&
1757 hdev->discovery.state == DISCOVERY_FINDING)
1758 queue_work(hdev->workqueue, &hdev->reenable_adv_work);
1759
1760 break;
1761
1762 default:
1763 bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d",
1764 enable);
1765 break;
1766 }
1767
1768 hci_dev_unlock(hdev);
1769 }
1770
hci_cc_le_set_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1771 static u8 hci_cc_le_set_scan_enable(struct hci_dev *hdev, void *data,
1772 struct sk_buff *skb)
1773 {
1774 struct hci_cp_le_set_scan_enable *cp;
1775 struct hci_ev_status *rp = data;
1776
1777 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1778
1779 if (rp->status)
1780 return rp->status;
1781
1782 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
1783 if (!cp)
1784 return rp->status;
1785
1786 le_set_scan_enable_complete(hdev, cp->enable);
1787
1788 return rp->status;
1789 }
1790
hci_cc_le_set_ext_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1791 static u8 hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev, void *data,
1792 struct sk_buff *skb)
1793 {
1794 struct hci_cp_le_set_ext_scan_enable *cp;
1795 struct hci_ev_status *rp = data;
1796
1797 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1798
1799 if (rp->status)
1800 return rp->status;
1801
1802 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE);
1803 if (!cp)
1804 return rp->status;
1805
1806 le_set_scan_enable_complete(hdev, cp->enable);
1807
1808 return rp->status;
1809 }
1810
hci_cc_le_read_num_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1811 static u8 hci_cc_le_read_num_adv_sets(struct hci_dev *hdev, void *data,
1812 struct sk_buff *skb)
1813 {
1814 struct hci_rp_le_read_num_supported_adv_sets *rp = data;
1815
1816 bt_dev_dbg(hdev, "status 0x%2.2x No of Adv sets %u", rp->status,
1817 rp->num_of_sets);
1818
1819 if (rp->status)
1820 return rp->status;
1821
1822 hdev->le_num_of_adv_sets = rp->num_of_sets;
1823
1824 return rp->status;
1825 }
1826
hci_cc_le_read_accept_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1827 static u8 hci_cc_le_read_accept_list_size(struct hci_dev *hdev, void *data,
1828 struct sk_buff *skb)
1829 {
1830 struct hci_rp_le_read_accept_list_size *rp = data;
1831
1832 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
1833
1834 if (rp->status)
1835 return rp->status;
1836
1837 hdev->le_accept_list_size = rp->size;
1838
1839 return rp->status;
1840 }
1841
hci_cc_le_clear_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1842 static u8 hci_cc_le_clear_accept_list(struct hci_dev *hdev, void *data,
1843 struct sk_buff *skb)
1844 {
1845 struct hci_ev_status *rp = data;
1846
1847 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1848
1849 if (rp->status)
1850 return rp->status;
1851
1852 hci_dev_lock(hdev);
1853 hci_bdaddr_list_clear(&hdev->le_accept_list);
1854 hci_dev_unlock(hdev);
1855
1856 return rp->status;
1857 }
1858
hci_cc_le_add_to_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1859 static u8 hci_cc_le_add_to_accept_list(struct hci_dev *hdev, void *data,
1860 struct sk_buff *skb)
1861 {
1862 struct hci_cp_le_add_to_accept_list *sent;
1863 struct hci_ev_status *rp = data;
1864
1865 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1866
1867 if (rp->status)
1868 return rp->status;
1869
1870 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
1871 if (!sent)
1872 return rp->status;
1873
1874 hci_dev_lock(hdev);
1875 hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr,
1876 sent->bdaddr_type);
1877 hci_dev_unlock(hdev);
1878
1879 return rp->status;
1880 }
1881
hci_cc_le_del_from_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1882 static u8 hci_cc_le_del_from_accept_list(struct hci_dev *hdev, void *data,
1883 struct sk_buff *skb)
1884 {
1885 struct hci_cp_le_del_from_accept_list *sent;
1886 struct hci_ev_status *rp = data;
1887
1888 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1889
1890 if (rp->status)
1891 return rp->status;
1892
1893 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST);
1894 if (!sent)
1895 return rp->status;
1896
1897 hci_dev_lock(hdev);
1898 hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr,
1899 sent->bdaddr_type);
1900 hci_dev_unlock(hdev);
1901
1902 return rp->status;
1903 }
1904
hci_cc_le_read_supported_states(struct hci_dev * hdev,void * data,struct sk_buff * skb)1905 static u8 hci_cc_le_read_supported_states(struct hci_dev *hdev, void *data,
1906 struct sk_buff *skb)
1907 {
1908 struct hci_rp_le_read_supported_states *rp = data;
1909
1910 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1911
1912 if (rp->status)
1913 return rp->status;
1914
1915 memcpy(hdev->le_states, rp->le_states, 8);
1916
1917 return rp->status;
1918 }
1919
hci_cc_le_read_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1920 static u8 hci_cc_le_read_def_data_len(struct hci_dev *hdev, void *data,
1921 struct sk_buff *skb)
1922 {
1923 struct hci_rp_le_read_def_data_len *rp = data;
1924
1925 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1926
1927 if (rp->status)
1928 return rp->status;
1929
1930 hdev->le_def_tx_len = le16_to_cpu(rp->tx_len);
1931 hdev->le_def_tx_time = le16_to_cpu(rp->tx_time);
1932
1933 return rp->status;
1934 }
1935
hci_cc_le_write_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1936 static u8 hci_cc_le_write_def_data_len(struct hci_dev *hdev, void *data,
1937 struct sk_buff *skb)
1938 {
1939 struct hci_cp_le_write_def_data_len *sent;
1940 struct hci_ev_status *rp = data;
1941
1942 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1943
1944 if (rp->status)
1945 return rp->status;
1946
1947 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN);
1948 if (!sent)
1949 return rp->status;
1950
1951 hdev->le_def_tx_len = le16_to_cpu(sent->tx_len);
1952 hdev->le_def_tx_time = le16_to_cpu(sent->tx_time);
1953
1954 return rp->status;
1955 }
1956
hci_cc_le_add_to_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1957 static u8 hci_cc_le_add_to_resolv_list(struct hci_dev *hdev, void *data,
1958 struct sk_buff *skb)
1959 {
1960 struct hci_cp_le_add_to_resolv_list *sent;
1961 struct hci_ev_status *rp = data;
1962
1963 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1964
1965 if (rp->status)
1966 return rp->status;
1967
1968 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST);
1969 if (!sent)
1970 return rp->status;
1971
1972 hci_dev_lock(hdev);
1973 hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
1974 sent->bdaddr_type, sent->peer_irk,
1975 sent->local_irk);
1976 hci_dev_unlock(hdev);
1977
1978 return rp->status;
1979 }
1980
hci_cc_le_del_from_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1981 static u8 hci_cc_le_del_from_resolv_list(struct hci_dev *hdev, void *data,
1982 struct sk_buff *skb)
1983 {
1984 struct hci_cp_le_del_from_resolv_list *sent;
1985 struct hci_ev_status *rp = data;
1986
1987 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1988
1989 if (rp->status)
1990 return rp->status;
1991
1992 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST);
1993 if (!sent)
1994 return rp->status;
1995
1996 hci_dev_lock(hdev);
1997 hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
1998 sent->bdaddr_type);
1999 hci_dev_unlock(hdev);
2000
2001 return rp->status;
2002 }
2003
hci_cc_le_clear_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)2004 static u8 hci_cc_le_clear_resolv_list(struct hci_dev *hdev, void *data,
2005 struct sk_buff *skb)
2006 {
2007 struct hci_ev_status *rp = data;
2008
2009 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2010
2011 if (rp->status)
2012 return rp->status;
2013
2014 hci_dev_lock(hdev);
2015 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2016 hci_dev_unlock(hdev);
2017
2018 return rp->status;
2019 }
2020
hci_cc_le_read_resolv_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)2021 static u8 hci_cc_le_read_resolv_list_size(struct hci_dev *hdev, void *data,
2022 struct sk_buff *skb)
2023 {
2024 struct hci_rp_le_read_resolv_list_size *rp = data;
2025
2026 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
2027
2028 if (rp->status)
2029 return rp->status;
2030
2031 hdev->le_resolv_list_size = rp->size;
2032
2033 return rp->status;
2034 }
2035
hci_cc_le_set_addr_resolution_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)2036 static u8 hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev, void *data,
2037 struct sk_buff *skb)
2038 {
2039 struct hci_ev_status *rp = data;
2040 __u8 *sent;
2041
2042 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2043
2044 if (rp->status)
2045 return rp->status;
2046
2047 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE);
2048 if (!sent)
2049 return rp->status;
2050
2051 hci_dev_lock(hdev);
2052
2053 if (*sent)
2054 hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION);
2055 else
2056 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);
2057
2058 hci_dev_unlock(hdev);
2059
2060 return rp->status;
2061 }
2062
hci_cc_le_read_max_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)2063 static u8 hci_cc_le_read_max_data_len(struct hci_dev *hdev, void *data,
2064 struct sk_buff *skb)
2065 {
2066 struct hci_rp_le_read_max_data_len *rp = data;
2067
2068 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2069
2070 if (rp->status)
2071 return rp->status;
2072
2073 hdev->le_max_tx_len = le16_to_cpu(rp->tx_len);
2074 hdev->le_max_tx_time = le16_to_cpu(rp->tx_time);
2075 hdev->le_max_rx_len = le16_to_cpu(rp->rx_len);
2076 hdev->le_max_rx_time = le16_to_cpu(rp->rx_time);
2077
2078 return rp->status;
2079 }
2080
hci_cc_write_le_host_supported(struct hci_dev * hdev,void * data,struct sk_buff * skb)2081 static u8 hci_cc_write_le_host_supported(struct hci_dev *hdev, void *data,
2082 struct sk_buff *skb)
2083 {
2084 struct hci_cp_write_le_host_supported *sent;
2085 struct hci_ev_status *rp = data;
2086
2087 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2088
2089 if (rp->status)
2090 return rp->status;
2091
2092 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED);
2093 if (!sent)
2094 return rp->status;
2095
2096 hci_dev_lock(hdev);
2097
2098 if (sent->le) {
2099 hdev->features[1][0] |= LMP_HOST_LE;
2100 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
2101 } else {
2102 hdev->features[1][0] &= ~LMP_HOST_LE;
2103 hci_dev_clear_flag(hdev, HCI_LE_ENABLED);
2104 hci_dev_clear_flag(hdev, HCI_ADVERTISING);
2105 }
2106
2107 if (sent->simul)
2108 hdev->features[1][0] |= LMP_HOST_LE_BREDR;
2109 else
2110 hdev->features[1][0] &= ~LMP_HOST_LE_BREDR;
2111
2112 hci_dev_unlock(hdev);
2113
2114 return rp->status;
2115 }
2116
hci_cc_set_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2117 static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data,
2118 struct sk_buff *skb)
2119 {
2120 struct hci_cp_le_set_adv_param *cp;
2121 struct hci_ev_status *rp = data;
2122
2123 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2124
2125 if (rp->status)
2126 return rp->status;
2127
2128 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM);
2129 if (!cp)
2130 return rp->status;
2131
2132 hci_dev_lock(hdev);
2133 hdev->adv_addr_type = cp->own_address_type;
2134 hci_dev_unlock(hdev);
2135
2136 return rp->status;
2137 }
2138
hci_cc_set_ext_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2139 static u8 hci_cc_set_ext_adv_param(struct hci_dev *hdev, void *data,
2140 struct sk_buff *skb)
2141 {
2142 struct hci_rp_le_set_ext_adv_params *rp = data;
2143 struct hci_cp_le_set_ext_adv_params *cp;
2144 struct adv_info *adv_instance;
2145
2146 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2147
2148 if (rp->status)
2149 return rp->status;
2150
2151 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS);
2152 if (!cp)
2153 return rp->status;
2154
2155 hci_dev_lock(hdev);
2156 hdev->adv_addr_type = cp->own_addr_type;
2157 if (!cp->handle) {
2158 /* Store in hdev for instance 0 */
2159 hdev->adv_tx_power = rp->tx_power;
2160 } else {
2161 adv_instance = hci_find_adv_instance(hdev, cp->handle);
2162 if (adv_instance)
2163 adv_instance->tx_power = rp->tx_power;
2164 }
2165 /* Update adv data as tx power is known now */
2166 hci_update_adv_data(hdev, cp->handle);
2167
2168 hci_dev_unlock(hdev);
2169
2170 return rp->status;
2171 }
2172
hci_cc_read_rssi(struct hci_dev * hdev,void * data,struct sk_buff * skb)2173 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data,
2174 struct sk_buff *skb)
2175 {
2176 struct hci_rp_read_rssi *rp = data;
2177 struct hci_conn *conn;
2178
2179 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2180
2181 if (rp->status)
2182 return rp->status;
2183
2184 hci_dev_lock(hdev);
2185
2186 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2187 if (conn)
2188 conn->rssi = rp->rssi;
2189
2190 hci_dev_unlock(hdev);
2191
2192 return rp->status;
2193 }
2194
hci_cc_read_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)2195 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data,
2196 struct sk_buff *skb)
2197 {
2198 struct hci_cp_read_tx_power *sent;
2199 struct hci_rp_read_tx_power *rp = data;
2200 struct hci_conn *conn;
2201
2202 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2203
2204 if (rp->status)
2205 return rp->status;
2206
2207 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
2208 if (!sent)
2209 return rp->status;
2210
2211 hci_dev_lock(hdev);
2212
2213 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2214 if (!conn)
2215 goto unlock;
2216
2217 switch (sent->type) {
2218 case 0x00:
2219 conn->tx_power = rp->tx_power;
2220 break;
2221 case 0x01:
2222 conn->max_tx_power = rp->tx_power;
2223 break;
2224 }
2225
2226 unlock:
2227 hci_dev_unlock(hdev);
2228 return rp->status;
2229 }
2230
hci_cc_write_ssp_debug_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)2231 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data,
2232 struct sk_buff *skb)
2233 {
2234 struct hci_ev_status *rp = data;
2235 u8 *mode;
2236
2237 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2238
2239 if (rp->status)
2240 return rp->status;
2241
2242 mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
2243 if (mode)
2244 hdev->ssp_debug_mode = *mode;
2245
2246 return rp->status;
2247 }
2248
hci_cs_inquiry(struct hci_dev * hdev,__u8 status)2249 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
2250 {
2251 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2252
2253 if (status)
2254 return;
2255
2256 if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
2257 set_bit(HCI_INQUIRY, &hdev->flags);
2258 }
2259
hci_cs_create_conn(struct hci_dev * hdev,__u8 status)2260 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
2261 {
2262 struct hci_cp_create_conn *cp;
2263 struct hci_conn *conn;
2264
2265 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2266
2267 cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
2268 if (!cp)
2269 return;
2270
2271 hci_dev_lock(hdev);
2272
2273 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2274
2275 bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn);
2276
2277 if (status) {
2278 if (conn && conn->state == BT_CONNECT) {
2279 conn->state = BT_CLOSED;
2280 hci_connect_cfm(conn, status);
2281 hci_conn_del(conn);
2282 }
2283 } else {
2284 if (!conn) {
2285 conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
2286 HCI_ROLE_MASTER);
2287 if (IS_ERR(conn))
2288 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
2289 }
2290 }
2291
2292 hci_dev_unlock(hdev);
2293 }
2294
hci_cs_add_sco(struct hci_dev * hdev,__u8 status)2295 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
2296 {
2297 struct hci_cp_add_sco *cp;
2298 struct hci_conn *acl;
2299 struct hci_link *link;
2300 __u16 handle;
2301
2302 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2303
2304 if (!status)
2305 return;
2306
2307 cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
2308 if (!cp)
2309 return;
2310
2311 handle = __le16_to_cpu(cp->handle);
2312
2313 bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
2314
2315 hci_dev_lock(hdev);
2316
2317 acl = hci_conn_hash_lookup_handle(hdev, handle);
2318 if (acl) {
2319 link = list_first_entry_or_null(&acl->link_list,
2320 struct hci_link, list);
2321 if (link && link->conn) {
2322 link->conn->state = BT_CLOSED;
2323
2324 hci_connect_cfm(link->conn, status);
2325 hci_conn_del(link->conn);
2326 }
2327 }
2328
2329 hci_dev_unlock(hdev);
2330 }
2331
hci_cs_auth_requested(struct hci_dev * hdev,__u8 status)2332 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
2333 {
2334 struct hci_cp_auth_requested *cp;
2335 struct hci_conn *conn;
2336
2337 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2338
2339 if (!status)
2340 return;
2341
2342 cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
2343 if (!cp)
2344 return;
2345
2346 hci_dev_lock(hdev);
2347
2348 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2349 if (conn) {
2350 if (conn->state == BT_CONFIG) {
2351 hci_connect_cfm(conn, status);
2352 hci_conn_drop(conn);
2353 }
2354 }
2355
2356 hci_dev_unlock(hdev);
2357 }
2358
hci_cs_set_conn_encrypt(struct hci_dev * hdev,__u8 status)2359 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
2360 {
2361 struct hci_cp_set_conn_encrypt *cp;
2362 struct hci_conn *conn;
2363
2364 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2365
2366 if (!status)
2367 return;
2368
2369 cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
2370 if (!cp)
2371 return;
2372
2373 hci_dev_lock(hdev);
2374
2375 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2376 if (conn) {
2377 if (conn->state == BT_CONFIG) {
2378 hci_connect_cfm(conn, status);
2379 hci_conn_drop(conn);
2380 }
2381 }
2382
2383 hci_dev_unlock(hdev);
2384 }
2385
hci_outgoing_auth_needed(struct hci_dev * hdev,struct hci_conn * conn)2386 static int hci_outgoing_auth_needed(struct hci_dev *hdev,
2387 struct hci_conn *conn)
2388 {
2389 if (conn->state != BT_CONFIG || !conn->out)
2390 return 0;
2391
2392 if (conn->pending_sec_level == BT_SECURITY_SDP)
2393 return 0;
2394
2395 /* Only request authentication for SSP connections or non-SSP
2396 * devices with sec_level MEDIUM or HIGH or if MITM protection
2397 * is requested.
2398 */
2399 if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
2400 conn->pending_sec_level != BT_SECURITY_FIPS &&
2401 conn->pending_sec_level != BT_SECURITY_HIGH &&
2402 conn->pending_sec_level != BT_SECURITY_MEDIUM)
2403 return 0;
2404
2405 return 1;
2406 }
2407
hci_resolve_name(struct hci_dev * hdev,struct inquiry_entry * e)2408 static int hci_resolve_name(struct hci_dev *hdev,
2409 struct inquiry_entry *e)
2410 {
2411 struct hci_cp_remote_name_req cp;
2412
2413 memset(&cp, 0, sizeof(cp));
2414
2415 bacpy(&cp.bdaddr, &e->data.bdaddr);
2416 cp.pscan_rep_mode = e->data.pscan_rep_mode;
2417 cp.pscan_mode = e->data.pscan_mode;
2418 cp.clock_offset = e->data.clock_offset;
2419
2420 return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
2421 }
2422
hci_resolve_next_name(struct hci_dev * hdev)2423 static bool hci_resolve_next_name(struct hci_dev *hdev)
2424 {
2425 struct discovery_state *discov = &hdev->discovery;
2426 struct inquiry_entry *e;
2427
2428 if (list_empty(&discov->resolve))
2429 return false;
2430
2431 /* We should stop if we already spent too much time resolving names. */
2432 if (time_after(jiffies, discov->name_resolve_timeout)) {
2433 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long.");
2434 return false;
2435 }
2436
2437 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2438 if (!e)
2439 return false;
2440
2441 if (hci_resolve_name(hdev, e) == 0) {
2442 e->name_state = NAME_PENDING;
2443 return true;
2444 }
2445
2446 return false;
2447 }
2448
hci_check_pending_name(struct hci_dev * hdev,struct hci_conn * conn,bdaddr_t * bdaddr,u8 * name,u8 name_len)2449 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
2450 bdaddr_t *bdaddr, u8 *name, u8 name_len)
2451 {
2452 struct discovery_state *discov = &hdev->discovery;
2453 struct inquiry_entry *e;
2454
2455 /* Update the mgmt connected state if necessary. Be careful with
2456 * conn objects that exist but are not (yet) connected however.
2457 * Only those in BT_CONFIG or BT_CONNECTED states can be
2458 * considered connected.
2459 */
2460 if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED))
2461 mgmt_device_connected(hdev, conn, name, name_len);
2462
2463 if (discov->state == DISCOVERY_STOPPED)
2464 return;
2465
2466 if (discov->state == DISCOVERY_STOPPING)
2467 goto discov_complete;
2468
2469 if (discov->state != DISCOVERY_RESOLVING)
2470 return;
2471
2472 e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
2473 /* If the device was not found in a list of found devices names of which
2474 * are pending. there is no need to continue resolving a next name as it
2475 * will be done upon receiving another Remote Name Request Complete
2476 * Event */
2477 if (!e)
2478 return;
2479
2480 list_del(&e->list);
2481
2482 e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN;
2483 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi,
2484 name, name_len);
2485
2486 if (hci_resolve_next_name(hdev))
2487 return;
2488
2489 discov_complete:
2490 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2491 }
2492
hci_cs_remote_name_req(struct hci_dev * hdev,__u8 status)2493 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
2494 {
2495 struct hci_cp_remote_name_req *cp;
2496 struct hci_conn *conn;
2497
2498 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2499
2500 /* If successful wait for the name req complete event before
2501 * checking for the need to do authentication */
2502 if (!status)
2503 return;
2504
2505 cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
2506 if (!cp)
2507 return;
2508
2509 hci_dev_lock(hdev);
2510
2511 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2512
2513 if (hci_dev_test_flag(hdev, HCI_MGMT))
2514 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
2515
2516 if (!conn)
2517 goto unlock;
2518
2519 if (!hci_outgoing_auth_needed(hdev, conn))
2520 goto unlock;
2521
2522 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2523 struct hci_cp_auth_requested auth_cp;
2524
2525 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2526
2527 auth_cp.handle = __cpu_to_le16(conn->handle);
2528 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
2529 sizeof(auth_cp), &auth_cp);
2530 }
2531
2532 unlock:
2533 hci_dev_unlock(hdev);
2534 }
2535
hci_cs_read_remote_features(struct hci_dev * hdev,__u8 status)2536 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
2537 {
2538 struct hci_cp_read_remote_features *cp;
2539 struct hci_conn *conn;
2540
2541 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2542
2543 if (!status)
2544 return;
2545
2546 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
2547 if (!cp)
2548 return;
2549
2550 hci_dev_lock(hdev);
2551
2552 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2553 if (conn) {
2554 if (conn->state == BT_CONFIG) {
2555 hci_connect_cfm(conn, status);
2556 hci_conn_drop(conn);
2557 }
2558 }
2559
2560 hci_dev_unlock(hdev);
2561 }
2562
hci_cs_read_remote_ext_features(struct hci_dev * hdev,__u8 status)2563 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
2564 {
2565 struct hci_cp_read_remote_ext_features *cp;
2566 struct hci_conn *conn;
2567
2568 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2569
2570 if (!status)
2571 return;
2572
2573 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
2574 if (!cp)
2575 return;
2576
2577 hci_dev_lock(hdev);
2578
2579 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2580 if (conn) {
2581 if (conn->state == BT_CONFIG) {
2582 hci_connect_cfm(conn, status);
2583 hci_conn_drop(conn);
2584 }
2585 }
2586
2587 hci_dev_unlock(hdev);
2588 }
2589
hci_setup_sync_conn_status(struct hci_dev * hdev,__u16 handle,__u8 status)2590 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle,
2591 __u8 status)
2592 {
2593 struct hci_conn *acl;
2594 struct hci_link *link;
2595
2596 bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status);
2597
2598 hci_dev_lock(hdev);
2599
2600 acl = hci_conn_hash_lookup_handle(hdev, handle);
2601 if (acl) {
2602 link = list_first_entry_or_null(&acl->link_list,
2603 struct hci_link, list);
2604 if (link && link->conn) {
2605 link->conn->state = BT_CLOSED;
2606
2607 hci_connect_cfm(link->conn, status);
2608 hci_conn_del(link->conn);
2609 }
2610 }
2611
2612 hci_dev_unlock(hdev);
2613 }
2614
hci_cs_setup_sync_conn(struct hci_dev * hdev,__u8 status)2615 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2616 {
2617 struct hci_cp_setup_sync_conn *cp;
2618
2619 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2620
2621 if (!status)
2622 return;
2623
2624 cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
2625 if (!cp)
2626 return;
2627
2628 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2629 }
2630
hci_cs_enhanced_setup_sync_conn(struct hci_dev * hdev,__u8 status)2631 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2632 {
2633 struct hci_cp_enhanced_setup_sync_conn *cp;
2634
2635 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2636
2637 if (!status)
2638 return;
2639
2640 cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN);
2641 if (!cp)
2642 return;
2643
2644 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2645 }
2646
hci_cs_sniff_mode(struct hci_dev * hdev,__u8 status)2647 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
2648 {
2649 struct hci_cp_sniff_mode *cp;
2650 struct hci_conn *conn;
2651
2652 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2653
2654 if (!status)
2655 return;
2656
2657 cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
2658 if (!cp)
2659 return;
2660
2661 hci_dev_lock(hdev);
2662
2663 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2664 if (conn) {
2665 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2666
2667 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2668 hci_sco_setup(conn, status);
2669 }
2670
2671 hci_dev_unlock(hdev);
2672 }
2673
hci_cs_exit_sniff_mode(struct hci_dev * hdev,__u8 status)2674 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
2675 {
2676 struct hci_cp_exit_sniff_mode *cp;
2677 struct hci_conn *conn;
2678
2679 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2680
2681 if (!status)
2682 return;
2683
2684 cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
2685 if (!cp)
2686 return;
2687
2688 hci_dev_lock(hdev);
2689
2690 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2691 if (conn) {
2692 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2693
2694 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2695 hci_sco_setup(conn, status);
2696 }
2697
2698 hci_dev_unlock(hdev);
2699 }
2700
hci_cs_disconnect(struct hci_dev * hdev,u8 status)2701 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
2702 {
2703 struct hci_cp_disconnect *cp;
2704 struct hci_conn_params *params;
2705 struct hci_conn *conn;
2706 bool mgmt_conn;
2707
2708 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2709
2710 /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
2711 * otherwise cleanup the connection immediately.
2712 */
2713 if (!status && !hdev->suspended)
2714 return;
2715
2716 cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
2717 if (!cp)
2718 return;
2719
2720 hci_dev_lock(hdev);
2721
2722 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2723 if (!conn)
2724 goto unlock;
2725
2726 if (status) {
2727 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2728 conn->dst_type, status);
2729
2730 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
2731 hdev->cur_adv_instance = conn->adv_instance;
2732 hci_enable_advertising(hdev);
2733 }
2734
2735 /* Inform sockets conn is gone before we delete it */
2736 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED);
2737
2738 goto done;
2739 }
2740
2741 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
2742
2743 if (conn->type == ACL_LINK) {
2744 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
2745 hci_remove_link_key(hdev, &conn->dst);
2746 }
2747
2748 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
2749 if (params) {
2750 switch (params->auto_connect) {
2751 case HCI_AUTO_CONN_LINK_LOSS:
2752 if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT)
2753 break;
2754 fallthrough;
2755
2756 case HCI_AUTO_CONN_DIRECT:
2757 case HCI_AUTO_CONN_ALWAYS:
2758 hci_pend_le_list_del_init(params);
2759 hci_pend_le_list_add(params, &hdev->pend_le_conns);
2760 break;
2761
2762 default:
2763 break;
2764 }
2765 }
2766
2767 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
2768 cp->reason, mgmt_conn);
2769
2770 hci_disconn_cfm(conn, cp->reason);
2771
2772 done:
2773 /* If the disconnection failed for any reason, the upper layer
2774 * does not retry to disconnect in current implementation.
2775 * Hence, we need to do some basic cleanup here and re-enable
2776 * advertising if necessary.
2777 */
2778 hci_conn_del(conn);
2779 unlock:
2780 hci_dev_unlock(hdev);
2781 }
2782
ev_bdaddr_type(struct hci_dev * hdev,u8 type,bool * resolved)2783 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved)
2784 {
2785 /* When using controller based address resolution, then the new
2786 * address types 0x02 and 0x03 are used. These types need to be
2787 * converted back into either public address or random address type
2788 */
2789 switch (type) {
2790 case ADDR_LE_DEV_PUBLIC_RESOLVED:
2791 if (resolved)
2792 *resolved = true;
2793 return ADDR_LE_DEV_PUBLIC;
2794 case ADDR_LE_DEV_RANDOM_RESOLVED:
2795 if (resolved)
2796 *resolved = true;
2797 return ADDR_LE_DEV_RANDOM;
2798 }
2799
2800 if (resolved)
2801 *resolved = false;
2802 return type;
2803 }
2804
cs_le_create_conn(struct hci_dev * hdev,bdaddr_t * peer_addr,u8 peer_addr_type,u8 own_address_type,u8 filter_policy)2805 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
2806 u8 peer_addr_type, u8 own_address_type,
2807 u8 filter_policy)
2808 {
2809 struct hci_conn *conn;
2810
2811 conn = hci_conn_hash_lookup_le(hdev, peer_addr,
2812 peer_addr_type);
2813 if (!conn)
2814 return;
2815
2816 own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL);
2817
2818 /* Store the initiator and responder address information which
2819 * is needed for SMP. These values will not change during the
2820 * lifetime of the connection.
2821 */
2822 conn->init_addr_type = own_address_type;
2823 if (own_address_type == ADDR_LE_DEV_RANDOM)
2824 bacpy(&conn->init_addr, &hdev->random_addr);
2825 else
2826 bacpy(&conn->init_addr, &hdev->bdaddr);
2827
2828 conn->resp_addr_type = peer_addr_type;
2829 bacpy(&conn->resp_addr, peer_addr);
2830 }
2831
hci_cs_le_create_conn(struct hci_dev * hdev,u8 status)2832 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
2833 {
2834 struct hci_cp_le_create_conn *cp;
2835
2836 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2837
2838 /* All connection failure handling is taken care of by the
2839 * hci_conn_failed function which is triggered by the HCI
2840 * request completion callbacks used for connecting.
2841 */
2842 if (status)
2843 return;
2844
2845 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
2846 if (!cp)
2847 return;
2848
2849 hci_dev_lock(hdev);
2850
2851 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2852 cp->own_address_type, cp->filter_policy);
2853
2854 hci_dev_unlock(hdev);
2855 }
2856
hci_cs_le_ext_create_conn(struct hci_dev * hdev,u8 status)2857 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
2858 {
2859 struct hci_cp_le_ext_create_conn *cp;
2860
2861 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2862
2863 /* All connection failure handling is taken care of by the
2864 * hci_conn_failed function which is triggered by the HCI
2865 * request completion callbacks used for connecting.
2866 */
2867 if (status)
2868 return;
2869
2870 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
2871 if (!cp)
2872 return;
2873
2874 hci_dev_lock(hdev);
2875
2876 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2877 cp->own_addr_type, cp->filter_policy);
2878
2879 hci_dev_unlock(hdev);
2880 }
2881
hci_cs_le_read_remote_features(struct hci_dev * hdev,u8 status)2882 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
2883 {
2884 struct hci_cp_le_read_remote_features *cp;
2885 struct hci_conn *conn;
2886
2887 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2888
2889 if (!status)
2890 return;
2891
2892 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
2893 if (!cp)
2894 return;
2895
2896 hci_dev_lock(hdev);
2897
2898 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2899 if (conn) {
2900 if (conn->state == BT_CONFIG) {
2901 hci_connect_cfm(conn, status);
2902 hci_conn_drop(conn);
2903 }
2904 }
2905
2906 hci_dev_unlock(hdev);
2907 }
2908
hci_cs_le_start_enc(struct hci_dev * hdev,u8 status)2909 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
2910 {
2911 struct hci_cp_le_start_enc *cp;
2912 struct hci_conn *conn;
2913
2914 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2915
2916 if (!status)
2917 return;
2918
2919 hci_dev_lock(hdev);
2920
2921 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
2922 if (!cp)
2923 goto unlock;
2924
2925 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2926 if (!conn)
2927 goto unlock;
2928
2929 if (conn->state != BT_CONNECTED)
2930 goto unlock;
2931
2932 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
2933 hci_conn_drop(conn);
2934
2935 unlock:
2936 hci_dev_unlock(hdev);
2937 }
2938
hci_cs_switch_role(struct hci_dev * hdev,u8 status)2939 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
2940 {
2941 struct hci_cp_switch_role *cp;
2942 struct hci_conn *conn;
2943
2944 BT_DBG("%s status 0x%2.2x", hdev->name, status);
2945
2946 if (!status)
2947 return;
2948
2949 cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
2950 if (!cp)
2951 return;
2952
2953 hci_dev_lock(hdev);
2954
2955 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2956 if (conn)
2957 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
2958
2959 hci_dev_unlock(hdev);
2960 }
2961
hci_inquiry_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)2962 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data,
2963 struct sk_buff *skb)
2964 {
2965 struct hci_ev_status *ev = data;
2966 struct discovery_state *discov = &hdev->discovery;
2967 struct inquiry_entry *e;
2968
2969 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
2970
2971 if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
2972 return;
2973
2974 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
2975 wake_up_bit(&hdev->flags, HCI_INQUIRY);
2976
2977 if (!hci_dev_test_flag(hdev, HCI_MGMT))
2978 return;
2979
2980 hci_dev_lock(hdev);
2981
2982 if (discov->state != DISCOVERY_FINDING)
2983 goto unlock;
2984
2985 if (list_empty(&discov->resolve)) {
2986 /* When BR/EDR inquiry is active and no LE scanning is in
2987 * progress, then change discovery state to indicate completion.
2988 *
2989 * When running LE scanning and BR/EDR inquiry simultaneously
2990 * and the LE scan already finished, then change the discovery
2991 * state to indicate completion.
2992 */
2993 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2994 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
2995 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2996 goto unlock;
2997 }
2998
2999 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
3000 if (e && hci_resolve_name(hdev, e) == 0) {
3001 e->name_state = NAME_PENDING;
3002 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
3003 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION;
3004 } else {
3005 /* When BR/EDR inquiry is active and no LE scanning is in
3006 * progress, then change discovery state to indicate completion.
3007 *
3008 * When running LE scanning and BR/EDR inquiry simultaneously
3009 * and the LE scan already finished, then change the discovery
3010 * state to indicate completion.
3011 */
3012 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
3013 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
3014 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3015 }
3016
3017 unlock:
3018 hci_dev_unlock(hdev);
3019 }
3020
hci_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)3021 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata,
3022 struct sk_buff *skb)
3023 {
3024 struct hci_ev_inquiry_result *ev = edata;
3025 struct inquiry_data data;
3026 int i;
3027
3028 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT,
3029 flex_array_size(ev, info, ev->num)))
3030 return;
3031
3032 bt_dev_dbg(hdev, "num %d", ev->num);
3033
3034 if (!ev->num)
3035 return;
3036
3037 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
3038 return;
3039
3040 hci_dev_lock(hdev);
3041
3042 for (i = 0; i < ev->num; i++) {
3043 struct inquiry_info *info = &ev->info[i];
3044 u32 flags;
3045
3046 bacpy(&data.bdaddr, &info->bdaddr);
3047 data.pscan_rep_mode = info->pscan_rep_mode;
3048 data.pscan_period_mode = info->pscan_period_mode;
3049 data.pscan_mode = info->pscan_mode;
3050 memcpy(data.dev_class, info->dev_class, 3);
3051 data.clock_offset = info->clock_offset;
3052 data.rssi = HCI_RSSI_INVALID;
3053 data.ssp_mode = 0x00;
3054
3055 flags = hci_inquiry_cache_update(hdev, &data, false);
3056
3057 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3058 info->dev_class, HCI_RSSI_INVALID,
3059 flags, NULL, 0, NULL, 0, 0);
3060 }
3061
3062 hci_dev_unlock(hdev);
3063 }
3064
hci_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3065 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
3066 struct sk_buff *skb)
3067 {
3068 struct hci_ev_conn_complete *ev = data;
3069 struct hci_conn *conn;
3070 u8 status = ev->status;
3071
3072 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3073
3074 hci_dev_lock(hdev);
3075
3076 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
3077 if (!conn) {
3078 /* In case of error status and there is no connection pending
3079 * just unlock as there is nothing to cleanup.
3080 */
3081 if (ev->status)
3082 goto unlock;
3083
3084 /* Connection may not exist if auto-connected. Check the bredr
3085 * allowlist to see if this device is allowed to auto connect.
3086 * If link is an ACL type, create a connection class
3087 * automatically.
3088 *
3089 * Auto-connect will only occur if the event filter is
3090 * programmed with a given address. Right now, event filter is
3091 * only used during suspend.
3092 */
3093 if (ev->link_type == ACL_LINK &&
3094 hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
3095 &ev->bdaddr,
3096 BDADDR_BREDR)) {
3097 conn = hci_conn_add_unset(hdev, ev->link_type,
3098 &ev->bdaddr, HCI_ROLE_SLAVE);
3099 if (IS_ERR(conn)) {
3100 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3101 goto unlock;
3102 }
3103 } else {
3104 if (ev->link_type != SCO_LINK)
3105 goto unlock;
3106
3107 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK,
3108 &ev->bdaddr);
3109 if (!conn)
3110 goto unlock;
3111
3112 conn->type = SCO_LINK;
3113 }
3114 }
3115
3116 /* The HCI_Connection_Complete event is only sent once per connection.
3117 * Processing it more than once per connection can corrupt kernel memory.
3118 *
3119 * As the connection handle is set here for the first time, it indicates
3120 * whether the connection is already set up.
3121 */
3122 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
3123 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
3124 goto unlock;
3125 }
3126
3127 if (!status) {
3128 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
3129 if (status)
3130 goto done;
3131
3132 if (conn->type == ACL_LINK) {
3133 conn->state = BT_CONFIG;
3134 hci_conn_hold(conn);
3135
3136 if (!conn->out && !hci_conn_ssp_enabled(conn) &&
3137 !hci_find_link_key(hdev, &ev->bdaddr))
3138 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
3139 else
3140 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3141 } else
3142 conn->state = BT_CONNECTED;
3143
3144 hci_debugfs_create_conn(conn);
3145 hci_conn_add_sysfs(conn);
3146
3147 if (test_bit(HCI_AUTH, &hdev->flags))
3148 set_bit(HCI_CONN_AUTH, &conn->flags);
3149
3150 if (test_bit(HCI_ENCRYPT, &hdev->flags))
3151 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3152
3153 /* "Link key request" completed ahead of "connect request" completes */
3154 if (ev->encr_mode == 1 && !test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3155 ev->link_type == ACL_LINK) {
3156 struct link_key *key;
3157 struct hci_cp_read_enc_key_size cp;
3158
3159 key = hci_find_link_key(hdev, &ev->bdaddr);
3160 if (key) {
3161 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3162
3163 if (!read_key_size_capable(hdev)) {
3164 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3165 } else {
3166 cp.handle = cpu_to_le16(conn->handle);
3167 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3168 sizeof(cp), &cp)) {
3169 bt_dev_err(hdev, "sending read key size failed");
3170 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3171 }
3172 }
3173
3174 hci_encrypt_cfm(conn, ev->status);
3175 }
3176 }
3177
3178 /* Get remote features */
3179 if (conn->type == ACL_LINK) {
3180 struct hci_cp_read_remote_features cp;
3181 cp.handle = ev->handle;
3182 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
3183 sizeof(cp), &cp);
3184
3185 hci_update_scan(hdev);
3186 }
3187
3188 /* Set packet type for incoming connection */
3189 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
3190 struct hci_cp_change_conn_ptype cp;
3191 cp.handle = ev->handle;
3192 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3193 hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
3194 &cp);
3195 }
3196 }
3197
3198 if (conn->type == ACL_LINK)
3199 hci_sco_setup(conn, ev->status);
3200
3201 done:
3202 if (status) {
3203 hci_conn_failed(conn, status);
3204 } else if (ev->link_type == SCO_LINK) {
3205 switch (conn->setting & SCO_AIRMODE_MASK) {
3206 case SCO_AIRMODE_CVSD:
3207 if (hdev->notify)
3208 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
3209 break;
3210 }
3211
3212 hci_connect_cfm(conn, status);
3213 }
3214
3215 unlock:
3216 hci_dev_unlock(hdev);
3217 }
3218
hci_reject_conn(struct hci_dev * hdev,bdaddr_t * bdaddr)3219 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
3220 {
3221 struct hci_cp_reject_conn_req cp;
3222
3223 bacpy(&cp.bdaddr, bdaddr);
3224 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
3225 hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
3226 }
3227
hci_conn_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3228 static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
3229 struct sk_buff *skb)
3230 {
3231 struct hci_ev_conn_request *ev = data;
3232 int mask = hdev->link_mode;
3233 struct inquiry_entry *ie;
3234 struct hci_conn *conn;
3235 __u8 flags = 0;
3236
3237 bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type);
3238
3239 /* Reject incoming connection from device with same BD ADDR against
3240 * CVE-2020-26555
3241 */
3242 if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
3243 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
3244 &ev->bdaddr);
3245 hci_reject_conn(hdev, &ev->bdaddr);
3246 return;
3247 }
3248
3249 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
3250 &flags);
3251
3252 if (!(mask & HCI_LM_ACCEPT)) {
3253 hci_reject_conn(hdev, &ev->bdaddr);
3254 return;
3255 }
3256
3257 hci_dev_lock(hdev);
3258
3259 if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
3260 BDADDR_BREDR)) {
3261 hci_reject_conn(hdev, &ev->bdaddr);
3262 goto unlock;
3263 }
3264
3265 /* Require HCI_CONNECTABLE or an accept list entry to accept the
3266 * connection. These features are only touched through mgmt so
3267 * only do the checks if HCI_MGMT is set.
3268 */
3269 if (hci_dev_test_flag(hdev, HCI_MGMT) &&
3270 !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
3271 !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
3272 BDADDR_BREDR)) {
3273 hci_reject_conn(hdev, &ev->bdaddr);
3274 goto unlock;
3275 }
3276
3277 /* Connection accepted */
3278
3279 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3280 if (ie)
3281 memcpy(ie->data.dev_class, ev->dev_class, 3);
3282
3283 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
3284 &ev->bdaddr);
3285 if (!conn) {
3286 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr,
3287 HCI_ROLE_SLAVE);
3288 if (IS_ERR(conn)) {
3289 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3290 goto unlock;
3291 }
3292 }
3293
3294 memcpy(conn->dev_class, ev->dev_class, 3);
3295
3296 hci_dev_unlock(hdev);
3297
3298 if (ev->link_type == ACL_LINK ||
3299 (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
3300 struct hci_cp_accept_conn_req cp;
3301 conn->state = BT_CONNECT;
3302
3303 bacpy(&cp.bdaddr, &ev->bdaddr);
3304
3305 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
3306 cp.role = 0x00; /* Become central */
3307 else
3308 cp.role = 0x01; /* Remain peripheral */
3309
3310 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
3311 } else if (!(flags & HCI_PROTO_DEFER)) {
3312 struct hci_cp_accept_sync_conn_req cp;
3313 conn->state = BT_CONNECT;
3314
3315 bacpy(&cp.bdaddr, &ev->bdaddr);
3316 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3317
3318 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
3319 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
3320 cp.max_latency = cpu_to_le16(0xffff);
3321 cp.content_format = cpu_to_le16(hdev->voice_setting);
3322 cp.retrans_effort = 0xff;
3323
3324 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
3325 &cp);
3326 } else {
3327 conn->state = BT_CONNECT2;
3328 hci_connect_cfm(conn, 0);
3329 }
3330
3331 return;
3332 unlock:
3333 hci_dev_unlock(hdev);
3334 }
3335
hci_to_mgmt_reason(u8 err)3336 static u8 hci_to_mgmt_reason(u8 err)
3337 {
3338 switch (err) {
3339 case HCI_ERROR_CONNECTION_TIMEOUT:
3340 return MGMT_DEV_DISCONN_TIMEOUT;
3341 case HCI_ERROR_REMOTE_USER_TERM:
3342 case HCI_ERROR_REMOTE_LOW_RESOURCES:
3343 case HCI_ERROR_REMOTE_POWER_OFF:
3344 return MGMT_DEV_DISCONN_REMOTE;
3345 case HCI_ERROR_LOCAL_HOST_TERM:
3346 return MGMT_DEV_DISCONN_LOCAL_HOST;
3347 default:
3348 return MGMT_DEV_DISCONN_UNKNOWN;
3349 }
3350 }
3351
hci_disconn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3352 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
3353 struct sk_buff *skb)
3354 {
3355 struct hci_ev_disconn_complete *ev = data;
3356 u8 reason;
3357 struct hci_conn_params *params;
3358 struct hci_conn *conn;
3359 bool mgmt_connected;
3360
3361 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3362
3363 hci_dev_lock(hdev);
3364
3365 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3366 if (!conn)
3367 goto unlock;
3368
3369 if (ev->status) {
3370 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
3371 conn->dst_type, ev->status);
3372 goto unlock;
3373 }
3374
3375 conn->state = BT_CLOSED;
3376
3377 mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
3378
3379 if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
3380 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
3381 else
3382 reason = hci_to_mgmt_reason(ev->reason);
3383
3384 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
3385 reason, mgmt_connected);
3386
3387 if (conn->type == ACL_LINK) {
3388 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
3389 hci_remove_link_key(hdev, &conn->dst);
3390
3391 hci_update_scan(hdev);
3392 }
3393
3394 /* Re-enable passive scanning if disconnected device is marked
3395 * as auto-connectable.
3396 */
3397 if (conn->type == LE_LINK) {
3398 params = hci_conn_params_lookup(hdev, &conn->dst,
3399 conn->dst_type);
3400 if (params) {
3401 switch (params->auto_connect) {
3402 case HCI_AUTO_CONN_LINK_LOSS:
3403 if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
3404 break;
3405 fallthrough;
3406
3407 case HCI_AUTO_CONN_DIRECT:
3408 case HCI_AUTO_CONN_ALWAYS:
3409 hci_pend_le_list_del_init(params);
3410 hci_pend_le_list_add(params,
3411 &hdev->pend_le_conns);
3412 hci_update_passive_scan(hdev);
3413 break;
3414
3415 default:
3416 break;
3417 }
3418 }
3419 }
3420
3421 hci_disconn_cfm(conn, ev->reason);
3422
3423 /* Re-enable advertising if necessary, since it might
3424 * have been disabled by the connection. From the
3425 * HCI_LE_Set_Advertise_Enable command description in
3426 * the core specification (v4.0):
3427 * "The Controller shall continue advertising until the Host
3428 * issues an LE_Set_Advertise_Enable command with
3429 * Advertising_Enable set to 0x00 (Advertising is disabled)
3430 * or until a connection is created or until the Advertising
3431 * is timed out due to Directed Advertising."
3432 */
3433 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
3434 hdev->cur_adv_instance = conn->adv_instance;
3435 hci_enable_advertising(hdev);
3436 }
3437
3438 hci_conn_del(conn);
3439
3440 unlock:
3441 hci_dev_unlock(hdev);
3442 }
3443
hci_auth_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3444 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data,
3445 struct sk_buff *skb)
3446 {
3447 struct hci_ev_auth_complete *ev = data;
3448 struct hci_conn *conn;
3449
3450 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3451
3452 hci_dev_lock(hdev);
3453
3454 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3455 if (!conn)
3456 goto unlock;
3457
3458 if (!ev->status) {
3459 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3460 set_bit(HCI_CONN_AUTH, &conn->flags);
3461 conn->sec_level = conn->pending_sec_level;
3462 } else {
3463 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3464 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3465
3466 mgmt_auth_failed(conn, ev->status);
3467 }
3468
3469 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3470
3471 if (conn->state == BT_CONFIG) {
3472 if (!ev->status && hci_conn_ssp_enabled(conn)) {
3473 struct hci_cp_set_conn_encrypt cp;
3474 cp.handle = ev->handle;
3475 cp.encrypt = 0x01;
3476 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3477 &cp);
3478 } else {
3479 conn->state = BT_CONNECTED;
3480 hci_connect_cfm(conn, ev->status);
3481 hci_conn_drop(conn);
3482 }
3483 } else {
3484 hci_auth_cfm(conn, ev->status);
3485
3486 hci_conn_hold(conn);
3487 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3488 hci_conn_drop(conn);
3489 }
3490
3491 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
3492 if (!ev->status) {
3493 struct hci_cp_set_conn_encrypt cp;
3494 cp.handle = ev->handle;
3495 cp.encrypt = 0x01;
3496 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3497 &cp);
3498 } else {
3499 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3500 hci_encrypt_cfm(conn, ev->status);
3501 }
3502 }
3503
3504 unlock:
3505 hci_dev_unlock(hdev);
3506 }
3507
hci_remote_name_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3508 static void hci_remote_name_evt(struct hci_dev *hdev, void *data,
3509 struct sk_buff *skb)
3510 {
3511 struct hci_ev_remote_name *ev = data;
3512 struct hci_conn *conn;
3513
3514 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3515
3516 hci_dev_lock(hdev);
3517
3518 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3519
3520 if (!hci_dev_test_flag(hdev, HCI_MGMT))
3521 goto check_auth;
3522
3523 if (ev->status == 0)
3524 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
3525 strnlen(ev->name, HCI_MAX_NAME_LENGTH));
3526 else
3527 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
3528
3529 check_auth:
3530 if (!conn)
3531 goto unlock;
3532
3533 if (!hci_outgoing_auth_needed(hdev, conn))
3534 goto unlock;
3535
3536 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
3537 struct hci_cp_auth_requested cp;
3538
3539 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
3540
3541 cp.handle = __cpu_to_le16(conn->handle);
3542 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
3543 }
3544
3545 unlock:
3546 hci_dev_unlock(hdev);
3547 }
3548
hci_encrypt_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3549 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data,
3550 struct sk_buff *skb)
3551 {
3552 struct hci_ev_encrypt_change *ev = data;
3553 struct hci_conn *conn;
3554
3555 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3556
3557 hci_dev_lock(hdev);
3558
3559 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3560 if (!conn)
3561 goto unlock;
3562
3563 if (!ev->status) {
3564 if (ev->encrypt) {
3565 /* Encryption implies authentication */
3566 set_bit(HCI_CONN_AUTH, &conn->flags);
3567 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3568 conn->sec_level = conn->pending_sec_level;
3569
3570 /* P-256 authentication key implies FIPS */
3571 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
3572 set_bit(HCI_CONN_FIPS, &conn->flags);
3573
3574 if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
3575 conn->type == LE_LINK)
3576 set_bit(HCI_CONN_AES_CCM, &conn->flags);
3577 } else {
3578 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
3579 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
3580 }
3581 }
3582
3583 /* We should disregard the current RPA and generate a new one
3584 * whenever the encryption procedure fails.
3585 */
3586 if (ev->status && conn->type == LE_LINK) {
3587 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
3588 hci_adv_instances_set_rpa_expired(hdev, true);
3589 }
3590
3591 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3592
3593 /* Check link security requirements are met */
3594 if (!hci_conn_check_link_mode(conn))
3595 ev->status = HCI_ERROR_AUTH_FAILURE;
3596
3597 if (ev->status && conn->state == BT_CONNECTED) {
3598 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3599 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3600
3601 /* Notify upper layers so they can cleanup before
3602 * disconnecting.
3603 */
3604 hci_encrypt_cfm(conn, ev->status);
3605 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
3606 hci_conn_drop(conn);
3607 goto unlock;
3608 }
3609
3610 /* Try reading the encryption key size for encrypted ACL links */
3611 if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
3612 struct hci_cp_read_enc_key_size cp;
3613
3614 /* Only send HCI_Read_Encryption_Key_Size if the
3615 * controller really supports it. If it doesn't, assume
3616 * the default size (16).
3617 */
3618 if (!read_key_size_capable(hdev)) {
3619 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3620 goto notify;
3621 }
3622
3623 cp.handle = cpu_to_le16(conn->handle);
3624 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3625 sizeof(cp), &cp)) {
3626 bt_dev_err(hdev, "sending read key size failed");
3627 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3628 goto notify;
3629 }
3630
3631 goto unlock;
3632 }
3633
3634 /* We skip the WRITE_AUTH_PAYLOAD_TIMEOUT for ATS2851 based controllers
3635 * to avoid unexpected SMP command errors when pairing.
3636 */
3637 if (test_bit(HCI_QUIRK_BROKEN_WRITE_AUTH_PAYLOAD_TIMEOUT,
3638 &hdev->quirks))
3639 goto notify;
3640
3641 /* Set the default Authenticated Payload Timeout after
3642 * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
3643 * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
3644 * sent when the link is active and Encryption is enabled, the conn
3645 * type can be either LE or ACL and controller must support LMP Ping.
3646 * Ensure for AES-CCM encryption as well.
3647 */
3648 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3649 test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
3650 ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
3651 (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
3652 struct hci_cp_write_auth_payload_to cp;
3653
3654 cp.handle = cpu_to_le16(conn->handle);
3655 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
3656 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
3657 sizeof(cp), &cp))
3658 bt_dev_err(hdev, "write auth payload timeout failed");
3659 }
3660
3661 notify:
3662 hci_encrypt_cfm(conn, ev->status);
3663
3664 unlock:
3665 hci_dev_unlock(hdev);
3666 }
3667
hci_change_link_key_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3668 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data,
3669 struct sk_buff *skb)
3670 {
3671 struct hci_ev_change_link_key_complete *ev = data;
3672 struct hci_conn *conn;
3673
3674 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3675
3676 hci_dev_lock(hdev);
3677
3678 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3679 if (conn) {
3680 if (!ev->status)
3681 set_bit(HCI_CONN_SECURE, &conn->flags);
3682
3683 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3684
3685 hci_key_change_cfm(conn, ev->status);
3686 }
3687
3688 hci_dev_unlock(hdev);
3689 }
3690
hci_remote_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3691 static void hci_remote_features_evt(struct hci_dev *hdev, void *data,
3692 struct sk_buff *skb)
3693 {
3694 struct hci_ev_remote_features *ev = data;
3695 struct hci_conn *conn;
3696
3697 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3698
3699 hci_dev_lock(hdev);
3700
3701 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3702 if (!conn)
3703 goto unlock;
3704
3705 if (!ev->status)
3706 memcpy(conn->features[0], ev->features, 8);
3707
3708 if (conn->state != BT_CONFIG)
3709 goto unlock;
3710
3711 if (!ev->status && lmp_ext_feat_capable(hdev) &&
3712 lmp_ext_feat_capable(conn)) {
3713 struct hci_cp_read_remote_ext_features cp;
3714 cp.handle = ev->handle;
3715 cp.page = 0x01;
3716 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
3717 sizeof(cp), &cp);
3718 goto unlock;
3719 }
3720
3721 if (!ev->status) {
3722 struct hci_cp_remote_name_req cp;
3723 memset(&cp, 0, sizeof(cp));
3724 bacpy(&cp.bdaddr, &conn->dst);
3725 cp.pscan_rep_mode = 0x02;
3726 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
3727 } else {
3728 mgmt_device_connected(hdev, conn, NULL, 0);
3729 }
3730
3731 if (!hci_outgoing_auth_needed(hdev, conn)) {
3732 conn->state = BT_CONNECTED;
3733 hci_connect_cfm(conn, ev->status);
3734 hci_conn_drop(conn);
3735 }
3736
3737 unlock:
3738 hci_dev_unlock(hdev);
3739 }
3740
handle_cmd_cnt_and_timer(struct hci_dev * hdev,u8 ncmd)3741 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd)
3742 {
3743 cancel_delayed_work(&hdev->cmd_timer);
3744
3745 rcu_read_lock();
3746 if (!test_bit(HCI_RESET, &hdev->flags)) {
3747 if (ncmd) {
3748 cancel_delayed_work(&hdev->ncmd_timer);
3749 atomic_set(&hdev->cmd_cnt, 1);
3750 } else {
3751 if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
3752 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer,
3753 HCI_NCMD_TIMEOUT);
3754 }
3755 }
3756 rcu_read_unlock();
3757 }
3758
hci_cc_le_read_buffer_size_v2(struct hci_dev * hdev,void * data,struct sk_buff * skb)3759 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data,
3760 struct sk_buff *skb)
3761 {
3762 struct hci_rp_le_read_buffer_size_v2 *rp = data;
3763
3764 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3765
3766 if (rp->status)
3767 return rp->status;
3768
3769 hdev->le_mtu = __le16_to_cpu(rp->acl_mtu);
3770 hdev->le_pkts = rp->acl_max_pkt;
3771 hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu);
3772 hdev->iso_pkts = rp->iso_max_pkt;
3773
3774 hdev->le_cnt = hdev->le_pkts;
3775 hdev->iso_cnt = hdev->iso_pkts;
3776
3777 BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
3778 hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
3779
3780 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
3781 return HCI_ERROR_INVALID_PARAMETERS;
3782
3783 return rp->status;
3784 }
3785
hci_unbound_cis_failed(struct hci_dev * hdev,u8 cig,u8 status)3786 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status)
3787 {
3788 struct hci_conn *conn, *tmp;
3789
3790 lockdep_assert_held(&hdev->lock);
3791
3792 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
3793 if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY) ||
3794 conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig)
3795 continue;
3796
3797 if (HCI_CONN_HANDLE_UNSET(conn->handle))
3798 hci_conn_failed(conn, status);
3799 }
3800 }
3801
hci_cc_le_set_cig_params(struct hci_dev * hdev,void * data,struct sk_buff * skb)3802 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
3803 struct sk_buff *skb)
3804 {
3805 struct hci_rp_le_set_cig_params *rp = data;
3806 struct hci_cp_le_set_cig_params *cp;
3807 struct hci_conn *conn;
3808 u8 status = rp->status;
3809 bool pending = false;
3810 int i;
3811
3812 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3813
3814 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
3815 if (!rp->status && (!cp || rp->num_handles != cp->num_cis ||
3816 rp->cig_id != cp->cig_id)) {
3817 bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
3818 status = HCI_ERROR_UNSPECIFIED;
3819 }
3820
3821 hci_dev_lock(hdev);
3822
3823 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554
3824 *
3825 * If the Status return parameter is non-zero, then the state of the CIG
3826 * and its CIS configurations shall not be changed by the command. If
3827 * the CIG did not already exist, it shall not be created.
3828 */
3829 if (status) {
3830 /* Keep current configuration, fail only the unbound CIS */
3831 hci_unbound_cis_failed(hdev, rp->cig_id, status);
3832 goto unlock;
3833 }
3834
3835 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
3836 *
3837 * If the Status return parameter is zero, then the Controller shall
3838 * set the Connection_Handle arrayed return parameter to the connection
3839 * handle(s) corresponding to the CIS configurations specified in
3840 * the CIS_IDs command parameter, in the same order.
3841 */
3842 for (i = 0; i < rp->num_handles; ++i) {
3843 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
3844 cp->cis[i].cis_id);
3845 if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
3846 continue;
3847
3848 if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
3849 continue;
3850
3851 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i])))
3852 continue;
3853
3854 if (conn->state == BT_CONNECT)
3855 pending = true;
3856 }
3857
3858 unlock:
3859 if (pending)
3860 hci_le_create_cis_pending(hdev);
3861
3862 hci_dev_unlock(hdev);
3863
3864 return rp->status;
3865 }
3866
hci_cc_le_setup_iso_path(struct hci_dev * hdev,void * data,struct sk_buff * skb)3867 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data,
3868 struct sk_buff *skb)
3869 {
3870 struct hci_rp_le_setup_iso_path *rp = data;
3871 struct hci_cp_le_setup_iso_path *cp;
3872 struct hci_conn *conn;
3873
3874 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3875
3876 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH);
3877 if (!cp)
3878 return rp->status;
3879
3880 hci_dev_lock(hdev);
3881
3882 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
3883 if (!conn)
3884 goto unlock;
3885
3886 if (rp->status) {
3887 hci_connect_cfm(conn, rp->status);
3888 hci_conn_del(conn);
3889 goto unlock;
3890 }
3891
3892 switch (cp->direction) {
3893 /* Input (Host to Controller) */
3894 case 0x00:
3895 /* Only confirm connection if output only */
3896 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu)
3897 hci_connect_cfm(conn, rp->status);
3898 break;
3899 /* Output (Controller to Host) */
3900 case 0x01:
3901 /* Confirm connection since conn->iso_qos is always configured
3902 * last.
3903 */
3904 hci_connect_cfm(conn, rp->status);
3905
3906 /* Notify device connected in case it is a BIG Sync */
3907 if (!rp->status && test_bit(HCI_CONN_BIG_SYNC, &conn->flags))
3908 mgmt_device_connected(hdev, conn, NULL, 0);
3909
3910 break;
3911 }
3912
3913 unlock:
3914 hci_dev_unlock(hdev);
3915 return rp->status;
3916 }
3917
hci_cs_le_create_big(struct hci_dev * hdev,u8 status)3918 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status)
3919 {
3920 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3921 }
3922
hci_cc_set_per_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)3923 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data,
3924 struct sk_buff *skb)
3925 {
3926 struct hci_ev_status *rp = data;
3927 struct hci_cp_le_set_per_adv_params *cp;
3928
3929 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3930
3931 if (rp->status)
3932 return rp->status;
3933
3934 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS);
3935 if (!cp)
3936 return rp->status;
3937
3938 /* TODO: set the conn state */
3939 return rp->status;
3940 }
3941
hci_cc_le_set_per_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)3942 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data,
3943 struct sk_buff *skb)
3944 {
3945 struct hci_ev_status *rp = data;
3946 struct hci_cp_le_set_per_adv_enable *cp;
3947 struct adv_info *adv = NULL, *n;
3948 u8 per_adv_cnt = 0;
3949
3950 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3951
3952 if (rp->status)
3953 return rp->status;
3954
3955 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE);
3956 if (!cp)
3957 return rp->status;
3958
3959 hci_dev_lock(hdev);
3960
3961 adv = hci_find_adv_instance(hdev, cp->handle);
3962
3963 if (cp->enable) {
3964 hci_dev_set_flag(hdev, HCI_LE_PER_ADV);
3965
3966 if (adv)
3967 adv->enabled = true;
3968 } else {
3969 /* If just one instance was disabled check if there are
3970 * any other instance enabled before clearing HCI_LE_PER_ADV.
3971 * The current periodic adv instance will be marked as
3972 * disabled once extended advertising is also disabled.
3973 */
3974 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
3975 list) {
3976 if (adv->periodic && adv->enabled)
3977 per_adv_cnt++;
3978 }
3979
3980 if (per_adv_cnt > 1)
3981 goto unlock;
3982
3983 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV);
3984 }
3985
3986 unlock:
3987 hci_dev_unlock(hdev);
3988
3989 return rp->status;
3990 }
3991
3992 #define HCI_CC_VL(_op, _func, _min, _max) \
3993 { \
3994 .op = _op, \
3995 .func = _func, \
3996 .min_len = _min, \
3997 .max_len = _max, \
3998 }
3999
4000 #define HCI_CC(_op, _func, _len) \
4001 HCI_CC_VL(_op, _func, _len, _len)
4002
4003 #define HCI_CC_STATUS(_op, _func) \
4004 HCI_CC(_op, _func, sizeof(struct hci_ev_status))
4005
4006 static const struct hci_cc {
4007 u16 op;
4008 u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
4009 u16 min_len;
4010 u16 max_len;
4011 } hci_cc_table[] = {
4012 HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel),
4013 HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq),
4014 HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq),
4015 HCI_CC(HCI_OP_REMOTE_NAME_REQ_CANCEL, hci_cc_remote_name_req_cancel,
4016 sizeof(struct hci_rp_remote_name_req_cancel)),
4017 HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery,
4018 sizeof(struct hci_rp_role_discovery)),
4019 HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy,
4020 sizeof(struct hci_rp_read_link_policy)),
4021 HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy,
4022 sizeof(struct hci_rp_write_link_policy)),
4023 HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy,
4024 sizeof(struct hci_rp_read_def_link_policy)),
4025 HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY,
4026 hci_cc_write_def_link_policy),
4027 HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset),
4028 HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key,
4029 sizeof(struct hci_rp_read_stored_link_key)),
4030 HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key,
4031 sizeof(struct hci_rp_delete_stored_link_key)),
4032 HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name),
4033 HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name,
4034 sizeof(struct hci_rp_read_local_name)),
4035 HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable),
4036 HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
4037 HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable),
4038 HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter),
4039 HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev,
4040 sizeof(struct hci_rp_read_class_of_dev)),
4041 HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev),
4042 HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting,
4043 sizeof(struct hci_rp_read_voice_setting)),
4044 HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting),
4045 HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac,
4046 sizeof(struct hci_rp_read_num_supported_iac)),
4047 HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode),
4048 HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support),
4049 HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout,
4050 sizeof(struct hci_rp_read_auth_payload_to)),
4051 HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout,
4052 sizeof(struct hci_rp_write_auth_payload_to)),
4053 HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version,
4054 sizeof(struct hci_rp_read_local_version)),
4055 HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands,
4056 sizeof(struct hci_rp_read_local_commands)),
4057 HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features,
4058 sizeof(struct hci_rp_read_local_features)),
4059 HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features,
4060 sizeof(struct hci_rp_read_local_ext_features)),
4061 HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size,
4062 sizeof(struct hci_rp_read_buffer_size)),
4063 HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr,
4064 sizeof(struct hci_rp_read_bd_addr)),
4065 HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts,
4066 sizeof(struct hci_rp_read_local_pairing_opts)),
4067 HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity,
4068 sizeof(struct hci_rp_read_page_scan_activity)),
4069 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
4070 hci_cc_write_page_scan_activity),
4071 HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type,
4072 sizeof(struct hci_rp_read_page_scan_type)),
4073 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type),
4074 HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock,
4075 sizeof(struct hci_rp_read_clock)),
4076 HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size,
4077 sizeof(struct hci_rp_read_enc_key_size)),
4078 HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power,
4079 sizeof(struct hci_rp_read_inq_rsp_tx_power)),
4080 HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4081 hci_cc_read_def_err_data_reporting,
4082 sizeof(struct hci_rp_read_def_err_data_reporting)),
4083 HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4084 hci_cc_write_def_err_data_reporting),
4085 HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply,
4086 sizeof(struct hci_rp_pin_code_reply)),
4087 HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply,
4088 sizeof(struct hci_rp_pin_code_neg_reply)),
4089 HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data,
4090 sizeof(struct hci_rp_read_local_oob_data)),
4091 HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data,
4092 sizeof(struct hci_rp_read_local_oob_ext_data)),
4093 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size,
4094 sizeof(struct hci_rp_le_read_buffer_size)),
4095 HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features,
4096 sizeof(struct hci_rp_le_read_local_features)),
4097 HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power,
4098 sizeof(struct hci_rp_le_read_adv_tx_power)),
4099 HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply,
4100 sizeof(struct hci_rp_user_confirm_reply)),
4101 HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply,
4102 sizeof(struct hci_rp_user_confirm_reply)),
4103 HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply,
4104 sizeof(struct hci_rp_user_confirm_reply)),
4105 HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply,
4106 sizeof(struct hci_rp_user_confirm_reply)),
4107 HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr),
4108 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable),
4109 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param),
4110 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable),
4111 HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4112 hci_cc_le_read_accept_list_size,
4113 sizeof(struct hci_rp_le_read_accept_list_size)),
4114 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list),
4115 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST,
4116 hci_cc_le_add_to_accept_list),
4117 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
4118 hci_cc_le_del_from_accept_list),
4119 HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states,
4120 sizeof(struct hci_rp_le_read_supported_states)),
4121 HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len,
4122 sizeof(struct hci_rp_le_read_def_data_len)),
4123 HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN,
4124 hci_cc_le_write_def_data_len),
4125 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST,
4126 hci_cc_le_add_to_resolv_list),
4127 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST,
4128 hci_cc_le_del_from_resolv_list),
4129 HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST,
4130 hci_cc_le_clear_resolv_list),
4131 HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size,
4132 sizeof(struct hci_rp_le_read_resolv_list_size)),
4133 HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
4134 hci_cc_le_set_addr_resolution_enable),
4135 HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len,
4136 sizeof(struct hci_rp_le_read_max_data_len)),
4137 HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED,
4138 hci_cc_write_le_host_supported),
4139 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param),
4140 HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi,
4141 sizeof(struct hci_rp_read_rssi)),
4142 HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power,
4143 sizeof(struct hci_rp_read_tx_power)),
4144 HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode),
4145 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS,
4146 hci_cc_le_set_ext_scan_param),
4147 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE,
4148 hci_cc_le_set_ext_scan_enable),
4149 HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy),
4150 HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4151 hci_cc_le_read_num_adv_sets,
4152 sizeof(struct hci_rp_le_read_num_supported_adv_sets)),
4153 HCI_CC(HCI_OP_LE_SET_EXT_ADV_PARAMS, hci_cc_set_ext_adv_param,
4154 sizeof(struct hci_rp_le_set_ext_adv_params)),
4155 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE,
4156 hci_cc_le_set_ext_adv_enable),
4157 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
4158 hci_cc_le_set_adv_set_random_addr),
4159 HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set),
4160 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets),
4161 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param),
4162 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE,
4163 hci_cc_le_set_per_adv_enable),
4164 HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power,
4165 sizeof(struct hci_rp_le_read_transmit_power)),
4166 HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode),
4167 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2,
4168 sizeof(struct hci_rp_le_read_buffer_size_v2)),
4169 HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params,
4170 sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE),
4171 HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path,
4172 sizeof(struct hci_rp_le_setup_iso_path)),
4173 };
4174
hci_cc_func(struct hci_dev * hdev,const struct hci_cc * cc,struct sk_buff * skb)4175 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc,
4176 struct sk_buff *skb)
4177 {
4178 void *data;
4179
4180 if (skb->len < cc->min_len) {
4181 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u",
4182 cc->op, skb->len, cc->min_len);
4183 return HCI_ERROR_UNSPECIFIED;
4184 }
4185
4186 /* Just warn if the length is over max_len size it still be possible to
4187 * partially parse the cc so leave to callback to decide if that is
4188 * acceptable.
4189 */
4190 if (skb->len > cc->max_len)
4191 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u",
4192 cc->op, skb->len, cc->max_len);
4193
4194 data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len);
4195 if (!data)
4196 return HCI_ERROR_UNSPECIFIED;
4197
4198 return cc->func(hdev, data, skb);
4199 }
4200
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)4201 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
4202 struct sk_buff *skb, u16 *opcode, u8 *status,
4203 hci_req_complete_t *req_complete,
4204 hci_req_complete_skb_t *req_complete_skb)
4205 {
4206 struct hci_ev_cmd_complete *ev = data;
4207 int i;
4208
4209 *opcode = __le16_to_cpu(ev->opcode);
4210
4211 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4212
4213 for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) {
4214 if (hci_cc_table[i].op == *opcode) {
4215 *status = hci_cc_func(hdev, &hci_cc_table[i], skb);
4216 break;
4217 }
4218 }
4219
4220 if (i == ARRAY_SIZE(hci_cc_table)) {
4221 /* Unknown opcode, assume byte 0 contains the status, so
4222 * that e.g. __hci_cmd_sync() properly returns errors
4223 * for vendor specific commands send by HCI drivers.
4224 * If a vendor doesn't actually follow this convention we may
4225 * need to introduce a vendor CC table in order to properly set
4226 * the status.
4227 */
4228 *status = skb->data[0];
4229 }
4230
4231 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4232
4233 hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
4234 req_complete_skb);
4235
4236 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4237 bt_dev_err(hdev,
4238 "unexpected event for opcode 0x%4.4x", *opcode);
4239 return;
4240 }
4241
4242 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4243 queue_work(hdev->workqueue, &hdev->cmd_work);
4244 }
4245
hci_cs_le_create_cis(struct hci_dev * hdev,u8 status)4246 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
4247 {
4248 struct hci_cp_le_create_cis *cp;
4249 bool pending = false;
4250 int i;
4251
4252 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4253
4254 if (!status)
4255 return;
4256
4257 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
4258 if (!cp)
4259 return;
4260
4261 hci_dev_lock(hdev);
4262
4263 /* Remove connection if command failed */
4264 for (i = 0; i < cp->num_cis; i++) {
4265 struct hci_conn *conn;
4266 u16 handle;
4267
4268 handle = __le16_to_cpu(cp->cis[i].cis_handle);
4269
4270 conn = hci_conn_hash_lookup_handle(hdev, handle);
4271 if (conn) {
4272 if (test_and_clear_bit(HCI_CONN_CREATE_CIS,
4273 &conn->flags))
4274 pending = true;
4275 conn->state = BT_CLOSED;
4276 hci_connect_cfm(conn, status);
4277 hci_conn_del(conn);
4278 }
4279 }
4280 cp->num_cis = 0;
4281
4282 if (pending)
4283 hci_le_create_cis_pending(hdev);
4284
4285 hci_dev_unlock(hdev);
4286 }
4287
4288 #define HCI_CS(_op, _func) \
4289 { \
4290 .op = _op, \
4291 .func = _func, \
4292 }
4293
4294 static const struct hci_cs {
4295 u16 op;
4296 void (*func)(struct hci_dev *hdev, __u8 status);
4297 } hci_cs_table[] = {
4298 HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry),
4299 HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn),
4300 HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect),
4301 HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco),
4302 HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested),
4303 HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt),
4304 HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req),
4305 HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features),
4306 HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES,
4307 hci_cs_read_remote_ext_features),
4308 HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn),
4309 HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN,
4310 hci_cs_enhanced_setup_sync_conn),
4311 HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode),
4312 HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode),
4313 HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role),
4314 HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn),
4315 HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features),
4316 HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc),
4317 HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn),
4318 HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis),
4319 HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big),
4320 };
4321
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)4322 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data,
4323 struct sk_buff *skb, u16 *opcode, u8 *status,
4324 hci_req_complete_t *req_complete,
4325 hci_req_complete_skb_t *req_complete_skb)
4326 {
4327 struct hci_ev_cmd_status *ev = data;
4328 int i;
4329
4330 *opcode = __le16_to_cpu(ev->opcode);
4331 *status = ev->status;
4332
4333 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4334
4335 for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) {
4336 if (hci_cs_table[i].op == *opcode) {
4337 hci_cs_table[i].func(hdev, ev->status);
4338 break;
4339 }
4340 }
4341
4342 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4343
4344 /* Indicate request completion if the command failed. Also, if
4345 * we're not waiting for a special event and we get a success
4346 * command status we should try to flag the request as completed
4347 * (since for this kind of commands there will not be a command
4348 * complete event).
4349 */
4350 if (ev->status || (hdev->req_skb && !hci_skb_event(hdev->req_skb))) {
4351 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
4352 req_complete_skb);
4353 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4354 bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x",
4355 *opcode);
4356 return;
4357 }
4358 }
4359
4360 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4361 queue_work(hdev->workqueue, &hdev->cmd_work);
4362 }
4363
hci_hardware_error_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4364 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data,
4365 struct sk_buff *skb)
4366 {
4367 struct hci_ev_hardware_error *ev = data;
4368
4369 bt_dev_dbg(hdev, "code 0x%2.2x", ev->code);
4370
4371 hdev->hw_error_code = ev->code;
4372
4373 queue_work(hdev->req_workqueue, &hdev->error_reset);
4374 }
4375
hci_role_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4376 static void hci_role_change_evt(struct hci_dev *hdev, void *data,
4377 struct sk_buff *skb)
4378 {
4379 struct hci_ev_role_change *ev = data;
4380 struct hci_conn *conn;
4381
4382 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4383
4384 hci_dev_lock(hdev);
4385
4386 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4387 if (conn) {
4388 if (!ev->status)
4389 conn->role = ev->role;
4390
4391 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
4392
4393 hci_role_switch_cfm(conn, ev->status, ev->role);
4394 }
4395
4396 hci_dev_unlock(hdev);
4397 }
4398
hci_num_comp_pkts_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4399 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data,
4400 struct sk_buff *skb)
4401 {
4402 struct hci_ev_num_comp_pkts *ev = data;
4403 int i;
4404
4405 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS,
4406 flex_array_size(ev, handles, ev->num)))
4407 return;
4408
4409 bt_dev_dbg(hdev, "num %d", ev->num);
4410
4411 for (i = 0; i < ev->num; i++) {
4412 struct hci_comp_pkts_info *info = &ev->handles[i];
4413 struct hci_conn *conn;
4414 __u16 handle, count;
4415
4416 handle = __le16_to_cpu(info->handle);
4417 count = __le16_to_cpu(info->count);
4418
4419 conn = hci_conn_hash_lookup_handle(hdev, handle);
4420 if (!conn)
4421 continue;
4422
4423 conn->sent -= count;
4424
4425 switch (conn->type) {
4426 case ACL_LINK:
4427 hdev->acl_cnt += count;
4428 if (hdev->acl_cnt > hdev->acl_pkts)
4429 hdev->acl_cnt = hdev->acl_pkts;
4430 break;
4431
4432 case LE_LINK:
4433 if (hdev->le_pkts) {
4434 hdev->le_cnt += count;
4435 if (hdev->le_cnt > hdev->le_pkts)
4436 hdev->le_cnt = hdev->le_pkts;
4437 } else {
4438 hdev->acl_cnt += count;
4439 if (hdev->acl_cnt > hdev->acl_pkts)
4440 hdev->acl_cnt = hdev->acl_pkts;
4441 }
4442 break;
4443
4444 case SCO_LINK:
4445 case ESCO_LINK:
4446 hdev->sco_cnt += count;
4447 if (hdev->sco_cnt > hdev->sco_pkts)
4448 hdev->sco_cnt = hdev->sco_pkts;
4449
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,u8 phy,u8 sec_phy)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, u8 phy, u8 sec_phy)
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_BROKEN_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, phy, sec_phy);
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,u8 phy,u8 sec_phy,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, u8 phy, u8 sec_phy, s8 rssi,
6007 u8 *data, u8 len, bool ext_adv, bool ctl_time,
6008 u64 instant)
6009 {
6010 struct discovery_state *d = &hdev->discovery;
6011 struct smp_irk *irk;
6012 struct hci_conn *conn;
6013 bool match, bdaddr_resolved;
6014 u32 flags;
6015 u8 *ptr;
6016
6017 switch (type) {
6018 case LE_ADV_IND:
6019 case LE_ADV_DIRECT_IND:
6020 case LE_ADV_SCAN_IND:
6021 case LE_ADV_NONCONN_IND:
6022 case LE_ADV_SCAN_RSP:
6023 break;
6024 default:
6025 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6026 "type: 0x%02x", type);
6027 return;
6028 }
6029
6030 if (len > max_adv_len(hdev)) {
6031 bt_dev_err_ratelimited(hdev,
6032 "adv larger than maximum supported");
6033 return;
6034 }
6035
6036 /* Find the end of the data in case the report contains padded zero
6037 * bytes at the end causing an invalid length value.
6038 *
6039 * When data is NULL, len is 0 so there is no need for extra ptr
6040 * check as 'ptr < data + 0' is already false in such case.
6041 */
6042 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6043 if (ptr + 1 + *ptr > data + len)
6044 break;
6045 }
6046
6047 /* Adjust for actual length. This handles the case when remote
6048 * device is advertising with incorrect data length.
6049 */
6050 len = ptr - data;
6051
6052 /* If the direct address is present, then this report is from
6053 * a LE Direct Advertising Report event. In that case it is
6054 * important to see if the address is matching the local
6055 * controller address.
6056 *
6057 * If local privacy is not enable the controller shall not be
6058 * generating such event since according to its documentation it is only
6059 * valid for filter_policy 0x02 and 0x03, but the fact that it did
6060 * generate LE Direct Advertising Report means it is probably broken and
6061 * won't generate any other event which can potentially break
6062 * auto-connect logic so in case local privacy is not enable this
6063 * ignores the direct_addr so it works as a regular report.
6064 */
6065 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr &&
6066 hci_dev_test_flag(hdev, HCI_PRIVACY)) {
6067 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6068 &bdaddr_resolved);
6069
6070 /* Only resolvable random addresses are valid for these
6071 * kind of reports and others can be ignored.
6072 */
6073 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6074 return;
6075
6076 /* If the local IRK of the controller does not match
6077 * with the resolvable random address provided, then
6078 * this report can be ignored.
6079 */
6080 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6081 return;
6082 }
6083
6084 /* Check if we need to convert to identity address */
6085 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6086 if (irk) {
6087 bdaddr = &irk->bdaddr;
6088 bdaddr_type = irk->addr_type;
6089 }
6090
6091 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6092
6093 /* Check if we have been requested to connect to this device.
6094 *
6095 * direct_addr is set only for directed advertising reports (it is NULL
6096 * for advertising reports) and is already verified to be RPA above.
6097 */
6098 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6099 type, phy, sec_phy);
6100 if (!ext_adv && conn && type == LE_ADV_IND &&
6101 len <= max_adv_len(hdev)) {
6102 /* Store report for later inclusion by
6103 * mgmt_device_connected
6104 */
6105 memcpy(conn->le_adv_data, data, len);
6106 conn->le_adv_data_len = len;
6107 }
6108
6109 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6110 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6111 else
6112 flags = 0;
6113
6114 /* All scan results should be sent up for Mesh systems */
6115 if (hci_dev_test_flag(hdev, HCI_MESH)) {
6116 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6117 rssi, flags, data, len, NULL, 0, instant);
6118 return;
6119 }
6120
6121 /* Passive scanning shouldn't trigger any device found events,
6122 * except for devices marked as CONN_REPORT for which we do send
6123 * device found events, or advertisement monitoring requested.
6124 */
6125 if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6126 if (type == LE_ADV_DIRECT_IND)
6127 return;
6128
6129 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6130 bdaddr, bdaddr_type) &&
6131 idr_is_empty(&hdev->adv_monitors_idr))
6132 return;
6133
6134 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6135 rssi, flags, data, len, NULL, 0, 0);
6136 return;
6137 }
6138
6139 /* When receiving a scan response, then there is no way to
6140 * know if the remote device is connectable or not. However
6141 * since scan responses are merged with a previously seen
6142 * advertising report, the flags field from that report
6143 * will be used.
6144 *
6145 * In the unlikely case that a controller just sends a scan
6146 * response event that doesn't match the pending report, then
6147 * it is marked as a standalone SCAN_RSP.
6148 */
6149 if (type == LE_ADV_SCAN_RSP)
6150 flags = MGMT_DEV_FOUND_SCAN_RSP;
6151
6152 /* If there's nothing pending either store the data from this
6153 * event or send an immediate device found event if the data
6154 * should not be stored for later.
6155 */
6156 if (!has_pending_adv_report(hdev)) {
6157 /* If the report will trigger a SCAN_REQ store it for
6158 * later merging.
6159 */
6160 if (!ext_adv && (type == LE_ADV_IND ||
6161 type == LE_ADV_SCAN_IND)) {
6162 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6163 rssi, flags, data, len);
6164 return;
6165 }
6166
6167 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6168 rssi, flags, data, len, NULL, 0, 0);
6169 return;
6170 }
6171
6172 /* Check if the pending report is for the same device as the new one */
6173 match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6174 bdaddr_type == d->last_adv_addr_type);
6175
6176 /* If the pending data doesn't match this report or this isn't a
6177 * scan response (e.g. we got a duplicate ADV_IND) then force
6178 * sending of the pending data.
6179 */
6180 if (type != LE_ADV_SCAN_RSP || !match) {
6181 /* Send out whatever is in the cache, but skip duplicates */
6182 if (!match)
6183 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6184 d->last_adv_addr_type, NULL,
6185 d->last_adv_rssi, d->last_adv_flags,
6186 d->last_adv_data,
6187 d->last_adv_data_len, NULL, 0, 0);
6188
6189 /* If the new report will trigger a SCAN_REQ store it for
6190 * later merging.
6191 */
6192 if (!ext_adv && (type == LE_ADV_IND ||
6193 type == LE_ADV_SCAN_IND)) {
6194 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6195 rssi, flags, data, len);
6196 return;
6197 }
6198
6199 /* The advertising reports cannot be merged, so clear
6200 * the pending report and send out a device found event.
6201 */
6202 clear_pending_adv_report(hdev);
6203 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6204 rssi, flags, data, len, NULL, 0, 0);
6205 return;
6206 }
6207
6208 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6209 * the new event is a SCAN_RSP. We can therefore proceed with
6210 * sending a merged device found event.
6211 */
6212 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6213 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6214 d->last_adv_data, d->last_adv_data_len, data, len, 0);
6215 clear_pending_adv_report(hdev);
6216 }
6217
hci_le_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6218 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6219 struct sk_buff *skb)
6220 {
6221 struct hci_ev_le_advertising_report *ev = data;
6222 u64 instant = jiffies;
6223
6224 if (!ev->num)
6225 return;
6226
6227 hci_dev_lock(hdev);
6228
6229 while (ev->num--) {
6230 struct hci_ev_le_advertising_info *info;
6231 s8 rssi;
6232
6233 info = hci_le_ev_skb_pull(hdev, skb,
6234 HCI_EV_LE_ADVERTISING_REPORT,
6235 sizeof(*info));
6236 if (!info)
6237 break;
6238
6239 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6240 info->length + 1))
6241 break;
6242
6243 if (info->length <= max_adv_len(hdev)) {
6244 rssi = info->data[info->length];
6245 process_adv_report(hdev, info->type, &info->bdaddr,
6246 info->bdaddr_type, NULL, 0,
6247 HCI_ADV_PHY_1M, 0, rssi,
6248 info->data, info->length, false,
6249 false, instant);
6250 } else {
6251 bt_dev_err(hdev, "Dropping invalid advertising data");
6252 }
6253 }
6254
6255 hci_dev_unlock(hdev);
6256 }
6257
ext_evt_type_to_legacy(struct hci_dev * hdev,u16 evt_type)6258 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6259 {
6260 if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6261 switch (evt_type) {
6262 case LE_LEGACY_ADV_IND:
6263 return LE_ADV_IND;
6264 case LE_LEGACY_ADV_DIRECT_IND:
6265 return LE_ADV_DIRECT_IND;
6266 case LE_LEGACY_ADV_SCAN_IND:
6267 return LE_ADV_SCAN_IND;
6268 case LE_LEGACY_NONCONN_IND:
6269 return LE_ADV_NONCONN_IND;
6270 case LE_LEGACY_SCAN_RSP_ADV:
6271 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6272 return LE_ADV_SCAN_RSP;
6273 }
6274
6275 goto invalid;
6276 }
6277
6278 if (evt_type & LE_EXT_ADV_CONN_IND) {
6279 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6280 return LE_ADV_DIRECT_IND;
6281
6282 return LE_ADV_IND;
6283 }
6284
6285 if (evt_type & LE_EXT_ADV_SCAN_RSP)
6286 return LE_ADV_SCAN_RSP;
6287
6288 if (evt_type & LE_EXT_ADV_SCAN_IND)
6289 return LE_ADV_SCAN_IND;
6290
6291 if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6292 evt_type & LE_EXT_ADV_DIRECT_IND)
6293 return LE_ADV_NONCONN_IND;
6294
6295 invalid:
6296 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6297 evt_type);
6298
6299 return LE_ADV_INVALID;
6300 }
6301
hci_le_ext_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6302 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6303 struct sk_buff *skb)
6304 {
6305 struct hci_ev_le_ext_adv_report *ev = data;
6306 u64 instant = jiffies;
6307
6308 if (!ev->num)
6309 return;
6310
6311 hci_dev_lock(hdev);
6312
6313 while (ev->num--) {
6314 struct hci_ev_le_ext_adv_info *info;
6315 u8 legacy_evt_type;
6316 u16 evt_type;
6317
6318 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6319 sizeof(*info));
6320 if (!info)
6321 break;
6322
6323 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6324 info->length))
6325 break;
6326
6327 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6328 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6329
6330 if (test_bit(HCI_QUIRK_FIXUP_LE_EXT_ADV_REPORT_PHY,
6331 &hdev->quirks)) {
6332 info->primary_phy &= 0x1f;
6333 info->secondary_phy &= 0x1f;
6334 }
6335
6336 if (legacy_evt_type != LE_ADV_INVALID) {
6337 process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6338 info->bdaddr_type, NULL, 0,
6339 info->primary_phy,
6340 info->secondary_phy,
6341 info->rssi, info->data, info->length,
6342 !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6343 false, instant);
6344 }
6345 }
6346
6347 hci_dev_unlock(hdev);
6348 }
6349
hci_le_pa_term_sync(struct hci_dev * hdev,__le16 handle)6350 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6351 {
6352 struct hci_cp_le_pa_term_sync cp;
6353
6354 memset(&cp, 0, sizeof(cp));
6355 cp.handle = handle;
6356
6357 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6358 }
6359
hci_le_pa_sync_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6360 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6361 struct sk_buff *skb)
6362 {
6363 struct hci_ev_le_pa_sync_established *ev = data;
6364 int mask = hdev->link_mode;
6365 __u8 flags = 0;
6366 struct hci_conn *pa_sync, *conn;
6367
6368 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6369
6370 hci_dev_lock(hdev);
6371
6372 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6373
6374 conn = hci_conn_hash_lookup_sid(hdev, ev->sid, &ev->bdaddr,
6375 ev->bdaddr_type);
6376 if (!conn) {
6377 bt_dev_err(hdev,
6378 "Unable to find connection for dst %pMR sid 0x%2.2x",
6379 &ev->bdaddr, ev->sid);
6380 goto unlock;
6381 }
6382
6383 clear_bit(HCI_CONN_CREATE_PA_SYNC, &conn->flags);
6384
6385 conn->sync_handle = le16_to_cpu(ev->handle);
6386 conn->sid = HCI_SID_INVALID;
6387
6388 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags);
6389 if (!(mask & HCI_LM_ACCEPT)) {
6390 hci_le_pa_term_sync(hdev, ev->handle);
6391 goto unlock;
6392 }
6393
6394 if (!(flags & HCI_PROTO_DEFER))
6395 goto unlock;
6396
6397 /* Add connection to indicate PA sync event */
6398 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6399 HCI_ROLE_SLAVE);
6400
6401 if (IS_ERR(pa_sync))
6402 goto unlock;
6403
6404 pa_sync->sync_handle = le16_to_cpu(ev->handle);
6405
6406 if (ev->status) {
6407 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6408
6409 /* Notify iso layer */
6410 hci_connect_cfm(pa_sync, ev->status);
6411 }
6412
6413 unlock:
6414 /* Handle any other pending PA sync command */
6415 hci_pa_create_sync_pending(hdev);
6416
6417 hci_dev_unlock(hdev);
6418 }
6419
hci_le_per_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6420 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6421 struct sk_buff *skb)
6422 {
6423 struct hci_ev_le_per_adv_report *ev = data;
6424 int mask = hdev->link_mode;
6425 __u8 flags = 0;
6426 struct hci_conn *pa_sync;
6427
6428 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6429
6430 hci_dev_lock(hdev);
6431
6432 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6433 if (!(mask & HCI_LM_ACCEPT))
6434 goto unlock;
6435
6436 if (!(flags & HCI_PROTO_DEFER))
6437 goto unlock;
6438
6439 pa_sync = hci_conn_hash_lookup_pa_sync_handle
6440 (hdev,
6441 le16_to_cpu(ev->sync_handle));
6442
6443 if (!pa_sync)
6444 goto unlock;
6445
6446 if (ev->data_status == LE_PA_DATA_COMPLETE &&
6447 !test_and_set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags)) {
6448 /* Notify iso layer */
6449 hci_connect_cfm(pa_sync, 0);
6450
6451 /* Notify MGMT layer */
6452 mgmt_device_connected(hdev, pa_sync, NULL, 0);
6453 }
6454
6455 unlock:
6456 hci_dev_unlock(hdev);
6457 }
6458
hci_le_remote_feat_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6459 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6460 struct sk_buff *skb)
6461 {
6462 struct hci_ev_le_remote_feat_complete *ev = data;
6463 struct hci_conn *conn;
6464
6465 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6466
6467 hci_dev_lock(hdev);
6468
6469 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6470 if (conn) {
6471 if (!ev->status)
6472 memcpy(conn->features[0], ev->features, 8);
6473
6474 if (conn->state == BT_CONFIG) {
6475 __u8 status;
6476
6477 /* If the local controller supports peripheral-initiated
6478 * features exchange, but the remote controller does
6479 * not, then it is possible that the error code 0x1a
6480 * for unsupported remote feature gets returned.
6481 *
6482 * In this specific case, allow the connection to
6483 * transition into connected state and mark it as
6484 * successful.
6485 */
6486 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE &&
6487 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6488 status = 0x00;
6489 else
6490 status = ev->status;
6491
6492 conn->state = BT_CONNECTED;
6493 hci_connect_cfm(conn, status);
6494 hci_conn_drop(conn);
6495 }
6496 }
6497
6498 hci_dev_unlock(hdev);
6499 }
6500
hci_le_ltk_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6501 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6502 struct sk_buff *skb)
6503 {
6504 struct hci_ev_le_ltk_req *ev = data;
6505 struct hci_cp_le_ltk_reply cp;
6506 struct hci_cp_le_ltk_neg_reply neg;
6507 struct hci_conn *conn;
6508 struct smp_ltk *ltk;
6509
6510 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6511
6512 hci_dev_lock(hdev);
6513
6514 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6515 if (conn == NULL)
6516 goto not_found;
6517
6518 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6519 if (!ltk)
6520 goto not_found;
6521
6522 if (smp_ltk_is_sc(ltk)) {
6523 /* With SC both EDiv and Rand are set to zero */
6524 if (ev->ediv || ev->rand)
6525 goto not_found;
6526 } else {
6527 /* For non-SC keys check that EDiv and Rand match */
6528 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6529 goto not_found;
6530 }
6531
6532 memcpy(cp.ltk, ltk->val, ltk->enc_size);
6533 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6534 cp.handle = cpu_to_le16(conn->handle);
6535
6536 conn->pending_sec_level = smp_ltk_sec_level(ltk);
6537
6538 conn->enc_key_size = ltk->enc_size;
6539
6540 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6541
6542 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6543 * temporary key used to encrypt a connection following
6544 * pairing. It is used during the Encrypted Session Setup to
6545 * distribute the keys. Later, security can be re-established
6546 * using a distributed LTK.
6547 */
6548 if (ltk->type == SMP_STK) {
6549 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6550 list_del_rcu(<k->list);
6551 kfree_rcu(ltk, rcu);
6552 } else {
6553 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6554 }
6555
6556 hci_dev_unlock(hdev);
6557
6558 return;
6559
6560 not_found:
6561 neg.handle = ev->handle;
6562 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6563 hci_dev_unlock(hdev);
6564 }
6565
send_conn_param_neg_reply(struct hci_dev * hdev,u16 handle,u8 reason)6566 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6567 u8 reason)
6568 {
6569 struct hci_cp_le_conn_param_req_neg_reply cp;
6570
6571 cp.handle = cpu_to_le16(handle);
6572 cp.reason = reason;
6573
6574 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6575 &cp);
6576 }
6577
hci_le_remote_conn_param_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6578 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6579 struct sk_buff *skb)
6580 {
6581 struct hci_ev_le_remote_conn_param_req *ev = data;
6582 struct hci_cp_le_conn_param_req_reply cp;
6583 struct hci_conn *hcon;
6584 u16 handle, min, max, latency, timeout;
6585
6586 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6587
6588 handle = le16_to_cpu(ev->handle);
6589 min = le16_to_cpu(ev->interval_min);
6590 max = le16_to_cpu(ev->interval_max);
6591 latency = le16_to_cpu(ev->latency);
6592 timeout = le16_to_cpu(ev->timeout);
6593
6594 hcon = hci_conn_hash_lookup_handle(hdev, handle);
6595 if (!hcon || hcon->state != BT_CONNECTED)
6596 return send_conn_param_neg_reply(hdev, handle,
6597 HCI_ERROR_UNKNOWN_CONN_ID);
6598
6599 if (max > hcon->le_conn_max_interval)
6600 return send_conn_param_neg_reply(hdev, handle,
6601 HCI_ERROR_INVALID_LL_PARAMS);
6602
6603 if (hci_check_conn_params(min, max, latency, timeout))
6604 return send_conn_param_neg_reply(hdev, handle,
6605 HCI_ERROR_INVALID_LL_PARAMS);
6606
6607 if (hcon->role == HCI_ROLE_MASTER) {
6608 struct hci_conn_params *params;
6609 u8 store_hint;
6610
6611 hci_dev_lock(hdev);
6612
6613 params = hci_conn_params_lookup(hdev, &hcon->dst,
6614 hcon->dst_type);
6615 if (params) {
6616 params->conn_min_interval = min;
6617 params->conn_max_interval = max;
6618 params->conn_latency = latency;
6619 params->supervision_timeout = timeout;
6620 store_hint = 0x01;
6621 } else {
6622 store_hint = 0x00;
6623 }
6624
6625 hci_dev_unlock(hdev);
6626
6627 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6628 store_hint, min, max, latency, timeout);
6629 }
6630
6631 cp.handle = ev->handle;
6632 cp.interval_min = ev->interval_min;
6633 cp.interval_max = ev->interval_max;
6634 cp.latency = ev->latency;
6635 cp.timeout = ev->timeout;
6636 cp.min_ce_len = 0;
6637 cp.max_ce_len = 0;
6638
6639 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6640 }
6641
hci_le_direct_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6642 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6643 struct sk_buff *skb)
6644 {
6645 struct hci_ev_le_direct_adv_report *ev = data;
6646 u64 instant = jiffies;
6647 int i;
6648
6649 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6650 flex_array_size(ev, info, ev->num)))
6651 return;
6652
6653 if (!ev->num)
6654 return;
6655
6656 hci_dev_lock(hdev);
6657
6658 for (i = 0; i < ev->num; i++) {
6659 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6660
6661 process_adv_report(hdev, info->type, &info->bdaddr,
6662 info->bdaddr_type, &info->direct_addr,
6663 info->direct_addr_type, HCI_ADV_PHY_1M, 0,
6664 info->rssi, NULL, 0, false, false, instant);
6665 }
6666
6667 hci_dev_unlock(hdev);
6668 }
6669
hci_le_phy_update_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6670 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6671 struct sk_buff *skb)
6672 {
6673 struct hci_ev_le_phy_update_complete *ev = data;
6674 struct hci_conn *conn;
6675
6676 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6677
6678 if (ev->status)
6679 return;
6680
6681 hci_dev_lock(hdev);
6682
6683 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6684 if (!conn)
6685 goto unlock;
6686
6687 conn->le_tx_phy = ev->tx_phy;
6688 conn->le_rx_phy = ev->rx_phy;
6689
6690 unlock:
6691 hci_dev_unlock(hdev);
6692 }
6693
hci_le_cis_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6694 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6695 struct sk_buff *skb)
6696 {
6697 struct hci_evt_le_cis_established *ev = data;
6698 struct hci_conn *conn;
6699 struct bt_iso_qos *qos;
6700 bool pending = false;
6701 u16 handle = __le16_to_cpu(ev->handle);
6702 u32 c_sdu_interval, p_sdu_interval;
6703
6704 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6705
6706 hci_dev_lock(hdev);
6707
6708 conn = hci_conn_hash_lookup_handle(hdev, handle);
6709 if (!conn) {
6710 bt_dev_err(hdev,
6711 "Unable to find connection with handle 0x%4.4x",
6712 handle);
6713 goto unlock;
6714 }
6715
6716 if (conn->type != ISO_LINK) {
6717 bt_dev_err(hdev,
6718 "Invalid connection link type handle 0x%4.4x",
6719 handle);
6720 goto unlock;
6721 }
6722
6723 qos = &conn->iso_qos;
6724
6725 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6726
6727 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part G
6728 * page 3075:
6729 * Transport_Latency_C_To_P = CIG_Sync_Delay + (FT_C_To_P) ×
6730 * ISO_Interval + SDU_Interval_C_To_P
6731 * ...
6732 * SDU_Interval = (CIG_Sync_Delay + (FT) x ISO_Interval) -
6733 * Transport_Latency
6734 */
6735 c_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6736 (ev->c_ft * le16_to_cpu(ev->interval) * 1250)) -
6737 get_unaligned_le24(ev->c_latency);
6738 p_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6739 (ev->p_ft * le16_to_cpu(ev->interval) * 1250)) -
6740 get_unaligned_le24(ev->p_latency);
6741
6742 switch (conn->role) {
6743 case HCI_ROLE_SLAVE:
6744 qos->ucast.in.interval = c_sdu_interval;
6745 qos->ucast.out.interval = p_sdu_interval;
6746 /* Convert Transport Latency (us) to Latency (msec) */
6747 qos->ucast.in.latency =
6748 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6749 1000);
6750 qos->ucast.out.latency =
6751 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6752 1000);
6753 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6754 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6755 qos->ucast.in.phy = ev->c_phy;
6756 qos->ucast.out.phy = ev->p_phy;
6757 break;
6758 case HCI_ROLE_MASTER:
6759 qos->ucast.in.interval = p_sdu_interval;
6760 qos->ucast.out.interval = c_sdu_interval;
6761 /* Convert Transport Latency (us) to Latency (msec) */
6762 qos->ucast.out.latency =
6763 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6764 1000);
6765 qos->ucast.in.latency =
6766 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6767 1000);
6768 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6769 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6770 qos->ucast.out.phy = ev->c_phy;
6771 qos->ucast.in.phy = ev->p_phy;
6772 break;
6773 }
6774
6775 if (!ev->status) {
6776 conn->state = BT_CONNECTED;
6777 hci_debugfs_create_conn(conn);
6778 hci_conn_add_sysfs(conn);
6779 hci_iso_setup_path(conn);
6780 goto unlock;
6781 }
6782
6783 conn->state = BT_CLOSED;
6784 hci_connect_cfm(conn, ev->status);
6785 hci_conn_del(conn);
6786
6787 unlock:
6788 if (pending)
6789 hci_le_create_cis_pending(hdev);
6790
6791 hci_dev_unlock(hdev);
6792 }
6793
hci_le_reject_cis(struct hci_dev * hdev,__le16 handle)6794 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6795 {
6796 struct hci_cp_le_reject_cis cp;
6797
6798 memset(&cp, 0, sizeof(cp));
6799 cp.handle = handle;
6800 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6801 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6802 }
6803
hci_le_accept_cis(struct hci_dev * hdev,__le16 handle)6804 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6805 {
6806 struct hci_cp_le_accept_cis cp;
6807
6808 memset(&cp, 0, sizeof(cp));
6809 cp.handle = handle;
6810 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6811 }
6812
hci_le_cis_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6813 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6814 struct sk_buff *skb)
6815 {
6816 struct hci_evt_le_cis_req *ev = data;
6817 u16 acl_handle, cis_handle;
6818 struct hci_conn *acl, *cis;
6819 int mask;
6820 __u8 flags = 0;
6821
6822 acl_handle = __le16_to_cpu(ev->acl_handle);
6823 cis_handle = __le16_to_cpu(ev->cis_handle);
6824
6825 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
6826 acl_handle, cis_handle, ev->cig_id, ev->cis_id);
6827
6828 hci_dev_lock(hdev);
6829
6830 acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
6831 if (!acl)
6832 goto unlock;
6833
6834 mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
6835 if (!(mask & HCI_LM_ACCEPT)) {
6836 hci_le_reject_cis(hdev, ev->cis_handle);
6837 goto unlock;
6838 }
6839
6840 cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
6841 if (!cis) {
6842 cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
6843 cis_handle);
6844 if (IS_ERR(cis)) {
6845 hci_le_reject_cis(hdev, ev->cis_handle);
6846 goto unlock;
6847 }
6848 }
6849
6850 cis->iso_qos.ucast.cig = ev->cig_id;
6851 cis->iso_qos.ucast.cis = ev->cis_id;
6852
6853 if (!(flags & HCI_PROTO_DEFER)) {
6854 hci_le_accept_cis(hdev, ev->cis_handle);
6855 } else {
6856 cis->state = BT_CONNECT2;
6857 hci_connect_cfm(cis, 0);
6858 }
6859
6860 unlock:
6861 hci_dev_unlock(hdev);
6862 }
6863
hci_iso_term_big_sync(struct hci_dev * hdev,void * data)6864 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
6865 {
6866 u8 handle = PTR_UINT(data);
6867
6868 return hci_le_terminate_big_sync(hdev, handle,
6869 HCI_ERROR_LOCAL_HOST_TERM);
6870 }
6871
hci_le_create_big_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6872 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
6873 struct sk_buff *skb)
6874 {
6875 struct hci_evt_le_create_big_complete *ev = data;
6876 struct hci_conn *conn;
6877 __u8 i = 0;
6878
6879 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
6880
6881 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
6882 flex_array_size(ev, bis_handle, ev->num_bis)))
6883 return;
6884
6885 hci_dev_lock(hdev);
6886
6887 /* Connect all BISes that are bound to the BIG */
6888 while ((conn = hci_conn_hash_lookup_big_state(hdev, ev->handle,
6889 BT_BOUND))) {
6890 if (ev->status) {
6891 hci_connect_cfm(conn, ev->status);
6892 hci_conn_del(conn);
6893 continue;
6894 }
6895
6896 if (hci_conn_set_handle(conn,
6897 __le16_to_cpu(ev->bis_handle[i++])))
6898 continue;
6899
6900 conn->state = BT_CONNECTED;
6901 set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
6902 hci_debugfs_create_conn(conn);
6903 hci_conn_add_sysfs(conn);
6904 hci_iso_setup_path(conn);
6905 }
6906
6907 if (!ev->status && !i)
6908 /* If no BISes have been connected for the BIG,
6909 * terminate. This is in case all bound connections
6910 * have been closed before the BIG creation
6911 * has completed.
6912 */
6913 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
6914 UINT_PTR(ev->handle), NULL);
6915
6916 hci_dev_unlock(hdev);
6917 }
6918
hci_le_big_sync_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6919 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
6920 struct sk_buff *skb)
6921 {
6922 struct hci_evt_le_big_sync_estabilished *ev = data;
6923 struct hci_conn *bis, *conn;
6924 int i;
6925
6926 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6927
6928 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
6929 flex_array_size(ev, bis, ev->num_bis)))
6930 return;
6931
6932 hci_dev_lock(hdev);
6933
6934 conn = hci_conn_hash_lookup_big_sync_pend(hdev, ev->handle,
6935 ev->num_bis);
6936 if (!conn) {
6937 bt_dev_err(hdev,
6938 "Unable to find connection for big 0x%2.2x",
6939 ev->handle);
6940 goto unlock;
6941 }
6942
6943 clear_bit(HCI_CONN_CREATE_BIG_SYNC, &conn->flags);
6944
6945 conn->num_bis = 0;
6946 memset(conn->bis, 0, sizeof(conn->num_bis));
6947
6948 for (i = 0; i < ev->num_bis; i++) {
6949 u16 handle = le16_to_cpu(ev->bis[i]);
6950 __le32 interval;
6951
6952 bis = hci_conn_hash_lookup_handle(hdev, handle);
6953 if (!bis) {
6954 if (handle > HCI_CONN_HANDLE_MAX) {
6955 bt_dev_dbg(hdev, "ignore too large handle %u", handle);
6956 continue;
6957 }
6958 bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
6959 HCI_ROLE_SLAVE, handle);
6960 if (IS_ERR(bis))
6961 continue;
6962 }
6963
6964 if (ev->status != 0x42)
6965 /* Mark PA sync as established */
6966 set_bit(HCI_CONN_PA_SYNC, &bis->flags);
6967
6968 bis->sync_handle = conn->sync_handle;
6969 bis->iso_qos.bcast.big = ev->handle;
6970 memset(&interval, 0, sizeof(interval));
6971 memcpy(&interval, ev->latency, sizeof(ev->latency));
6972 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
6973 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
6974 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
6975 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
6976
6977 if (!ev->status) {
6978 set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
6979 hci_iso_setup_path(bis);
6980 }
6981 }
6982
6983 /* In case BIG sync failed, notify each failed connection to
6984 * the user after all hci connections have been added
6985 */
6986 if (ev->status)
6987 for (i = 0; i < ev->num_bis; i++) {
6988 u16 handle = le16_to_cpu(ev->bis[i]);
6989
6990 bis = hci_conn_hash_lookup_handle(hdev, handle);
6991 if (!bis)
6992 continue;
6993
6994 set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
6995 hci_connect_cfm(bis, ev->status);
6996 }
6997
6998 unlock:
6999 /* Handle any other pending BIG sync command */
7000 hci_le_big_create_sync_pending(hdev);
7001
7002 hci_dev_unlock(hdev);
7003 }
7004
hci_le_big_info_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)7005 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
7006 struct sk_buff *skb)
7007 {
7008 struct hci_evt_le_big_info_adv_report *ev = data;
7009 int mask = hdev->link_mode;
7010 __u8 flags = 0;
7011 struct hci_conn *pa_sync;
7012
7013 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
7014
7015 hci_dev_lock(hdev);
7016
7017 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
7018 if (!(mask & HCI_LM_ACCEPT))
7019 goto unlock;
7020
7021 if (!(flags & HCI_PROTO_DEFER))
7022 goto unlock;
7023
7024 pa_sync = hci_conn_hash_lookup_pa_sync_handle
7025 (hdev,
7026 le16_to_cpu(ev->sync_handle));
7027
7028 if (!pa_sync)
7029 goto unlock;
7030
7031 pa_sync->iso_qos.bcast.encryption = ev->encryption;
7032
7033 /* Notify iso layer */
7034 hci_connect_cfm(pa_sync, 0);
7035
7036 unlock:
7037 hci_dev_unlock(hdev);
7038 }
7039
7040 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
7041 [_op] = { \
7042 .func = _func, \
7043 .min_len = _min_len, \
7044 .max_len = _max_len, \
7045 }
7046
7047 #define HCI_LE_EV(_op, _func, _len) \
7048 HCI_LE_EV_VL(_op, _func, _len, _len)
7049
7050 #define HCI_LE_EV_STATUS(_op, _func) \
7051 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
7052
7053 /* Entries in this table shall have their position according to the subevent
7054 * opcode they handle so the use of the macros above is recommend since it does
7055 * attempt to initialize at its proper index using Designated Initializers that
7056 * way events without a callback function can be ommited.
7057 */
7058 static const struct hci_le_ev {
7059 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
7060 u16 min_len;
7061 u16 max_len;
7062 } hci_le_ev_table[U8_MAX + 1] = {
7063 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
7064 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
7065 sizeof(struct hci_ev_le_conn_complete)),
7066 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
7067 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
7068 sizeof(struct hci_ev_le_advertising_report),
7069 HCI_MAX_EVENT_SIZE),
7070 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7071 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7072 hci_le_conn_update_complete_evt,
7073 sizeof(struct hci_ev_le_conn_update_complete)),
7074 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7075 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7076 hci_le_remote_feat_complete_evt,
7077 sizeof(struct hci_ev_le_remote_feat_complete)),
7078 /* [0x05 = HCI_EV_LE_LTK_REQ] */
7079 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7080 sizeof(struct hci_ev_le_ltk_req)),
7081 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7082 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7083 hci_le_remote_conn_param_req_evt,
7084 sizeof(struct hci_ev_le_remote_conn_param_req)),
7085 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7086 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7087 hci_le_enh_conn_complete_evt,
7088 sizeof(struct hci_ev_le_enh_conn_complete)),
7089 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7090 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7091 sizeof(struct hci_ev_le_direct_adv_report),
7092 HCI_MAX_EVENT_SIZE),
7093 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7094 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7095 sizeof(struct hci_ev_le_phy_update_complete)),
7096 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7097 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7098 sizeof(struct hci_ev_le_ext_adv_report),
7099 HCI_MAX_EVENT_SIZE),
7100 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7101 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7102 hci_le_pa_sync_estabilished_evt,
7103 sizeof(struct hci_ev_le_pa_sync_established)),
7104 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7105 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7106 hci_le_per_adv_report_evt,
7107 sizeof(struct hci_ev_le_per_adv_report),
7108 HCI_MAX_EVENT_SIZE),
7109 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7110 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7111 sizeof(struct hci_evt_le_ext_adv_set_term)),
7112 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7113 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7114 sizeof(struct hci_evt_le_cis_established)),
7115 /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7116 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7117 sizeof(struct hci_evt_le_cis_req)),
7118 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7119 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7120 hci_le_create_big_complete_evt,
7121 sizeof(struct hci_evt_le_create_big_complete),
7122 HCI_MAX_EVENT_SIZE),
7123 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABILISHED] */
7124 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7125 hci_le_big_sync_established_evt,
7126 sizeof(struct hci_evt_le_big_sync_estabilished),
7127 HCI_MAX_EVENT_SIZE),
7128 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7129 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7130 hci_le_big_info_adv_report_evt,
7131 sizeof(struct hci_evt_le_big_info_adv_report),
7132 HCI_MAX_EVENT_SIZE),
7133 };
7134
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)7135 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7136 struct sk_buff *skb, u16 *opcode, u8 *status,
7137 hci_req_complete_t *req_complete,
7138 hci_req_complete_skb_t *req_complete_skb)
7139 {
7140 struct hci_ev_le_meta *ev = data;
7141 const struct hci_le_ev *subev;
7142
7143 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7144
7145 /* Only match event if command OGF is for LE */
7146 if (hdev->req_skb &&
7147 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 &&
7148 hci_skb_event(hdev->req_skb) == ev->subevent) {
7149 *opcode = hci_skb_opcode(hdev->req_skb);
7150 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7151 req_complete_skb);
7152 }
7153
7154 subev = &hci_le_ev_table[ev->subevent];
7155 if (!subev->func)
7156 return;
7157
7158 if (skb->len < subev->min_len) {
7159 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7160 ev->subevent, skb->len, subev->min_len);
7161 return;
7162 }
7163
7164 /* Just warn if the length is over max_len size it still be
7165 * possible to partially parse the event so leave to callback to
7166 * decide if that is acceptable.
7167 */
7168 if (skb->len > subev->max_len)
7169 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7170 ev->subevent, skb->len, subev->max_len);
7171 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7172 if (!data)
7173 return;
7174
7175 subev->func(hdev, data, skb);
7176 }
7177
hci_get_cmd_complete(struct hci_dev * hdev,u16 opcode,u8 event,struct sk_buff * skb)7178 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7179 u8 event, struct sk_buff *skb)
7180 {
7181 struct hci_ev_cmd_complete *ev;
7182 struct hci_event_hdr *hdr;
7183
7184 if (!skb)
7185 return false;
7186
7187 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7188 if (!hdr)
7189 return false;
7190
7191 if (event) {
7192 if (hdr->evt != event)
7193 return false;
7194 return true;
7195 }
7196
7197 /* Check if request ended in Command Status - no way to retrieve
7198 * any extra parameters in this case.
7199 */
7200 if (hdr->evt == HCI_EV_CMD_STATUS)
7201 return false;
7202
7203 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7204 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7205 hdr->evt);
7206 return false;
7207 }
7208
7209 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7210 if (!ev)
7211 return false;
7212
7213 if (opcode != __le16_to_cpu(ev->opcode)) {
7214 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7215 __le16_to_cpu(ev->opcode));
7216 return false;
7217 }
7218
7219 return true;
7220 }
7221
hci_store_wake_reason(struct hci_dev * hdev,u8 event,struct sk_buff * skb)7222 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7223 struct sk_buff *skb)
7224 {
7225 struct hci_ev_le_advertising_info *adv;
7226 struct hci_ev_le_direct_adv_info *direct_adv;
7227 struct hci_ev_le_ext_adv_info *ext_adv;
7228 const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7229 const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7230
7231 hci_dev_lock(hdev);
7232
7233 /* If we are currently suspended and this is the first BT event seen,
7234 * save the wake reason associated with the event.
7235 */
7236 if (!hdev->suspended || hdev->wake_reason)
7237 goto unlock;
7238
7239 /* Default to remote wake. Values for wake_reason are documented in the
7240 * Bluez mgmt api docs.
7241 */
7242 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7243
7244 /* Once configured for remote wakeup, we should only wake up for
7245 * reconnections. It's useful to see which device is waking us up so
7246 * keep track of the bdaddr of the connection event that woke us up.
7247 */
7248 if (event == HCI_EV_CONN_REQUEST) {
7249 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7250 hdev->wake_addr_type = BDADDR_BREDR;
7251 } else if (event == HCI_EV_CONN_COMPLETE) {
7252 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7253 hdev->wake_addr_type = BDADDR_BREDR;
7254 } else if (event == HCI_EV_LE_META) {
7255 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7256 u8 subevent = le_ev->subevent;
7257 u8 *ptr = &skb->data[sizeof(*le_ev)];
7258 u8 num_reports = *ptr;
7259
7260 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7261 subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7262 subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7263 num_reports) {
7264 adv = (void *)(ptr + 1);
7265 direct_adv = (void *)(ptr + 1);
7266 ext_adv = (void *)(ptr + 1);
7267
7268 switch (subevent) {
7269 case HCI_EV_LE_ADVERTISING_REPORT:
7270 bacpy(&hdev->wake_addr, &adv->bdaddr);
7271 hdev->wake_addr_type = adv->bdaddr_type;
7272 break;
7273 case HCI_EV_LE_DIRECT_ADV_REPORT:
7274 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7275 hdev->wake_addr_type = direct_adv->bdaddr_type;
7276 break;
7277 case HCI_EV_LE_EXT_ADV_REPORT:
7278 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7279 hdev->wake_addr_type = ext_adv->bdaddr_type;
7280 break;
7281 }
7282 }
7283 } else {
7284 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7285 }
7286
7287 unlock:
7288 hci_dev_unlock(hdev);
7289 }
7290
7291 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7292 [_op] = { \
7293 .req = false, \
7294 .func = _func, \
7295 .min_len = _min_len, \
7296 .max_len = _max_len, \
7297 }
7298
7299 #define HCI_EV(_op, _func, _len) \
7300 HCI_EV_VL(_op, _func, _len, _len)
7301
7302 #define HCI_EV_STATUS(_op, _func) \
7303 HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7304
7305 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7306 [_op] = { \
7307 .req = true, \
7308 .func_req = _func, \
7309 .min_len = _min_len, \
7310 .max_len = _max_len, \
7311 }
7312
7313 #define HCI_EV_REQ(_op, _func, _len) \
7314 HCI_EV_REQ_VL(_op, _func, _len, _len)
7315
7316 /* Entries in this table shall have their position according to the event opcode
7317 * they handle so the use of the macros above is recommend since it does attempt
7318 * to initialize at its proper index using Designated Initializers that way
7319 * events without a callback function don't have entered.
7320 */
7321 static const struct hci_ev {
7322 bool req;
7323 union {
7324 void (*func)(struct hci_dev *hdev, void *data,
7325 struct sk_buff *skb);
7326 void (*func_req)(struct hci_dev *hdev, void *data,
7327 struct sk_buff *skb, u16 *opcode, u8 *status,
7328 hci_req_complete_t *req_complete,
7329 hci_req_complete_skb_t *req_complete_skb);
7330 };
7331 u16 min_len;
7332 u16 max_len;
7333 } hci_ev_table[U8_MAX + 1] = {
7334 /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7335 HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7336 /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7337 HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7338 sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7339 /* [0x03 = HCI_EV_CONN_COMPLETE] */
7340 HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7341 sizeof(struct hci_ev_conn_complete)),
7342 /* [0x04 = HCI_EV_CONN_REQUEST] */
7343 HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7344 sizeof(struct hci_ev_conn_request)),
7345 /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7346 HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7347 sizeof(struct hci_ev_disconn_complete)),
7348 /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7349 HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7350 sizeof(struct hci_ev_auth_complete)),
7351 /* [0x07 = HCI_EV_REMOTE_NAME] */
7352 HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7353 sizeof(struct hci_ev_remote_name)),
7354 /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7355 HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7356 sizeof(struct hci_ev_encrypt_change)),
7357 /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7358 HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7359 hci_change_link_key_complete_evt,
7360 sizeof(struct hci_ev_change_link_key_complete)),
7361 /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7362 HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7363 sizeof(struct hci_ev_remote_features)),
7364 /* [0x0e = HCI_EV_CMD_COMPLETE] */
7365 HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7366 sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7367 /* [0x0f = HCI_EV_CMD_STATUS] */
7368 HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7369 sizeof(struct hci_ev_cmd_status)),
7370 /* [0x10 = HCI_EV_CMD_STATUS] */
7371 HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7372 sizeof(struct hci_ev_hardware_error)),
7373 /* [0x12 = HCI_EV_ROLE_CHANGE] */
7374 HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7375 sizeof(struct hci_ev_role_change)),
7376 /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7377 HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7378 sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7379 /* [0x14 = HCI_EV_MODE_CHANGE] */
7380 HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7381 sizeof(struct hci_ev_mode_change)),
7382 /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7383 HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7384 sizeof(struct hci_ev_pin_code_req)),
7385 /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7386 HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7387 sizeof(struct hci_ev_link_key_req)),
7388 /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7389 HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7390 sizeof(struct hci_ev_link_key_notify)),
7391 /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7392 HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7393 sizeof(struct hci_ev_clock_offset)),
7394 /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7395 HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7396 sizeof(struct hci_ev_pkt_type_change)),
7397 /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7398 HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7399 sizeof(struct hci_ev_pscan_rep_mode)),
7400 /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7401 HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7402 hci_inquiry_result_with_rssi_evt,
7403 sizeof(struct hci_ev_inquiry_result_rssi),
7404 HCI_MAX_EVENT_SIZE),
7405 /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7406 HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7407 sizeof(struct hci_ev_remote_ext_features)),
7408 /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7409 HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7410 sizeof(struct hci_ev_sync_conn_complete)),
7411 /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7412 HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7413 hci_extended_inquiry_result_evt,
7414 sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7415 /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7416 HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7417 sizeof(struct hci_ev_key_refresh_complete)),
7418 /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7419 HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7420 sizeof(struct hci_ev_io_capa_request)),
7421 /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7422 HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7423 sizeof(struct hci_ev_io_capa_reply)),
7424 /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7425 HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7426 sizeof(struct hci_ev_user_confirm_req)),
7427 /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7428 HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7429 sizeof(struct hci_ev_user_passkey_req)),
7430 /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7431 HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7432 sizeof(struct hci_ev_remote_oob_data_request)),
7433 /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7434 HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7435 sizeof(struct hci_ev_simple_pair_complete)),
7436 /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7437 HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7438 sizeof(struct hci_ev_user_passkey_notify)),
7439 /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7440 HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7441 sizeof(struct hci_ev_keypress_notify)),
7442 /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7443 HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7444 sizeof(struct hci_ev_remote_host_features)),
7445 /* [0x3e = HCI_EV_LE_META] */
7446 HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7447 sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7448 /* [0xff = HCI_EV_VENDOR] */
7449 HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7450 };
7451
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)7452 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7453 u16 *opcode, u8 *status,
7454 hci_req_complete_t *req_complete,
7455 hci_req_complete_skb_t *req_complete_skb)
7456 {
7457 const struct hci_ev *ev = &hci_ev_table[event];
7458 void *data;
7459
7460 if (!ev->func)
7461 return;
7462
7463 if (skb->len < ev->min_len) {
7464 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7465 event, skb->len, ev->min_len);
7466 return;
7467 }
7468
7469 /* Just warn if the length is over max_len size it still be
7470 * possible to partially parse the event so leave to callback to
7471 * decide if that is acceptable.
7472 */
7473 if (skb->len > ev->max_len)
7474 bt_dev_warn_ratelimited(hdev,
7475 "unexpected event 0x%2.2x length: %u > %u",
7476 event, skb->len, ev->max_len);
7477
7478 data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7479 if (!data)
7480 return;
7481
7482 if (ev->req)
7483 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7484 req_complete_skb);
7485 else
7486 ev->func(hdev, data, skb);
7487 }
7488
hci_event_packet(struct hci_dev * hdev,struct sk_buff * skb)7489 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7490 {
7491 struct hci_event_hdr *hdr = (void *) skb->data;
7492 hci_req_complete_t req_complete = NULL;
7493 hci_req_complete_skb_t req_complete_skb = NULL;
7494 struct sk_buff *orig_skb = NULL;
7495 u8 status = 0, event, req_evt = 0;
7496 u16 opcode = HCI_OP_NOP;
7497
7498 if (skb->len < sizeof(*hdr)) {
7499 bt_dev_err(hdev, "Malformed HCI Event");
7500 goto done;
7501 }
7502
7503 kfree_skb(hdev->recv_event);
7504 hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7505
7506 event = hdr->evt;
7507 if (!event) {
7508 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7509 event);
7510 goto done;
7511 }
7512
7513 /* Only match event if command OGF is not for LE */
7514 if (hdev->req_skb &&
7515 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) != 0x08 &&
7516 hci_skb_event(hdev->req_skb) == event) {
7517 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->req_skb),
7518 status, &req_complete, &req_complete_skb);
7519 req_evt = event;
7520 }
7521
7522 /* If it looks like we might end up having to call
7523 * req_complete_skb, store a pristine copy of the skb since the
7524 * various handlers may modify the original one through
7525 * skb_pull() calls, etc.
7526 */
7527 if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7528 event == HCI_EV_CMD_COMPLETE)
7529 orig_skb = skb_clone(skb, GFP_KERNEL);
7530
7531 skb_pull(skb, HCI_EVENT_HDR_SIZE);
7532
7533 /* Store wake reason if we're suspended */
7534 hci_store_wake_reason(hdev, event, skb);
7535
7536 bt_dev_dbg(hdev, "event 0x%2.2x", event);
7537
7538 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7539 &req_complete_skb);
7540
7541 if (req_complete) {
7542 req_complete(hdev, status, opcode);
7543 } else if (req_complete_skb) {
7544 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7545 kfree_skb(orig_skb);
7546 orig_skb = NULL;
7547 }
7548 req_complete_skb(hdev, status, opcode, orig_skb);
7549 }
7550
7551 done:
7552 kfree_skb(orig_skb);
7553 kfree_skb(skb);
7554 hdev->stat.evt_rx++;
7555 }
7556