1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
4 Copyright 2023-2024 NXP
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24 */
25
26 /* Bluetooth HCI event handling. */
27
28 #include <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_ev_status *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_STATUS(HCI_OP_REMOTE_NAME_REQ_CANCEL,
4016 hci_cc_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 hdev->sco_cnt += count;
4446 if (hdev->sco_cnt > hdev->sco_pkts)
4447 hdev->sco_cnt = hdev->sco_pkts;
4448 break;
4449
4450 case ISO_LINK:
4451 if (hdev->iso_pkts) {
4452 hdev->iso_cnt += count;
4453 if (hdev->iso_cnt > hdev->iso_pkts)
4454 hdev->iso_cnt = hdev->iso_pkts;
4455 } else if (hdev->le_pkts) {
4456 hdev->le_cnt += count;
4457 if (hdev->le_cnt > hdev->le_pkts)
4458 hdev->le_cnt = hdev->le_pkts;
4459 } else {
4460 hdev->acl_cnt += count;
4461 if (hdev->acl_cnt > hdev->acl_pkts)
4462 hdev->acl_cnt = hdev->acl_pkts;
4463 }
4464 break;
4465
4466 default:
4467 bt_dev_err(hdev, "unknown type %d conn %p",
4468 conn->type, conn);
4469 break;
4470 }
4471 }
4472
4473 queue_work(hdev->workqueue, &hdev->tx_work);
4474 }
4475
hci_mode_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4476 static void hci_mode_change_evt(struct hci_dev *hdev, void *data,
4477 struct sk_buff *skb)
4478 {
4479 struct hci_ev_mode_change *ev = data;
4480 struct hci_conn *conn;
4481
4482 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4483
4484 hci_dev_lock(hdev);
4485
4486 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4487 if (conn) {
4488 conn->mode = ev->mode;
4489
4490 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
4491 &conn->flags)) {
4492 if (conn->mode == HCI_CM_ACTIVE)
4493 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4494 else
4495 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4496 }
4497
4498 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
4499 hci_sco_setup(conn, ev->status);
4500 }
4501
4502 hci_dev_unlock(hdev);
4503 }
4504
hci_pin_code_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4505 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data,
4506 struct sk_buff *skb)
4507 {
4508 struct hci_ev_pin_code_req *ev = data;
4509 struct hci_conn *conn;
4510
4511 bt_dev_dbg(hdev, "");
4512
4513 hci_dev_lock(hdev);
4514
4515 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4516 if (!conn)
4517 goto unlock;
4518
4519 if (conn->state == BT_CONNECTED) {
4520 hci_conn_hold(conn);
4521 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
4522 hci_conn_drop(conn);
4523 }
4524
4525 if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
4526 !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
4527 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
4528 sizeof(ev->bdaddr), &ev->bdaddr);
4529 } else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4530 u8 secure;
4531
4532 if (conn->pending_sec_level == BT_SECURITY_HIGH)
4533 secure = 1;
4534 else
4535 secure = 0;
4536
4537 mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
4538 }
4539
4540 unlock:
4541 hci_dev_unlock(hdev);
4542 }
4543
conn_set_key(struct hci_conn * conn,u8 key_type,u8 pin_len)4544 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
4545 {
4546 if (key_type == HCI_LK_CHANGED_COMBINATION)
4547 return;
4548
4549 conn->pin_length = pin_len;
4550 conn->key_type = key_type;
4551
4552 switch (key_type) {
4553 case HCI_LK_LOCAL_UNIT:
4554 case HCI_LK_REMOTE_UNIT:
4555 case HCI_LK_DEBUG_COMBINATION:
4556 return;
4557 case HCI_LK_COMBINATION:
4558 if (pin_len == 16)
4559 conn->pending_sec_level = BT_SECURITY_HIGH;
4560 else
4561 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4562 break;
4563 case HCI_LK_UNAUTH_COMBINATION_P192:
4564 case HCI_LK_UNAUTH_COMBINATION_P256:
4565 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4566 break;
4567 case HCI_LK_AUTH_COMBINATION_P192:
4568 conn->pending_sec_level = BT_SECURITY_HIGH;
4569 break;
4570 case HCI_LK_AUTH_COMBINATION_P256:
4571 conn->pending_sec_level = BT_SECURITY_FIPS;
4572 break;
4573 }
4574 }
4575
hci_link_key_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4576 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data,
4577 struct sk_buff *skb)
4578 {
4579 struct hci_ev_link_key_req *ev = data;
4580 struct hci_cp_link_key_reply cp;
4581 struct hci_conn *conn;
4582 struct link_key *key;
4583
4584 bt_dev_dbg(hdev, "");
4585
4586 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4587 return;
4588
4589 hci_dev_lock(hdev);
4590
4591 key = hci_find_link_key(hdev, &ev->bdaddr);
4592 if (!key) {
4593 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr);
4594 goto not_found;
4595 }
4596
4597 bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr);
4598
4599 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4600 if (conn) {
4601 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4602
4603 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
4604 key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
4605 conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
4606 bt_dev_dbg(hdev, "ignoring unauthenticated key");
4607 goto not_found;
4608 }
4609
4610 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
4611 (conn->pending_sec_level == BT_SECURITY_HIGH ||
4612 conn->pending_sec_level == BT_SECURITY_FIPS)) {
4613 bt_dev_dbg(hdev, "ignoring key unauthenticated for high security");
4614 goto not_found;
4615 }
4616
4617 conn_set_key(conn, key->type, key->pin_len);
4618 }
4619
4620 bacpy(&cp.bdaddr, &ev->bdaddr);
4621 memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
4622
4623 hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
4624
4625 hci_dev_unlock(hdev);
4626
4627 return;
4628
4629 not_found:
4630 hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
4631 hci_dev_unlock(hdev);
4632 }
4633
hci_link_key_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4634 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data,
4635 struct sk_buff *skb)
4636 {
4637 struct hci_ev_link_key_notify *ev = data;
4638 struct hci_conn *conn;
4639 struct link_key *key;
4640 bool persistent;
4641 u8 pin_len = 0;
4642
4643 bt_dev_dbg(hdev, "");
4644
4645 hci_dev_lock(hdev);
4646
4647 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4648 if (!conn)
4649 goto unlock;
4650
4651 /* Ignore NULL link key against CVE-2020-26555 */
4652 if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
4653 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
4654 &ev->bdaddr);
4655 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
4656 hci_conn_drop(conn);
4657 goto unlock;
4658 }
4659
4660 hci_conn_hold(conn);
4661 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
4662 hci_conn_drop(conn);
4663
4664 set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4665 conn_set_key(conn, ev->key_type, conn->pin_length);
4666
4667 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4668 goto unlock;
4669
4670 key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
4671 ev->key_type, pin_len, &persistent);
4672 if (!key)
4673 goto unlock;
4674
4675 /* Update connection information since adding the key will have
4676 * fixed up the type in the case of changed combination keys.
4677 */
4678 if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
4679 conn_set_key(conn, key->type, key->pin_len);
4680
4681 mgmt_new_link_key(hdev, key, persistent);
4682
4683 /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
4684 * is set. If it's not set simply remove the key from the kernel
4685 * list (we've still notified user space about it but with
4686 * store_hint being 0).
4687 */
4688 if (key->type == HCI_LK_DEBUG_COMBINATION &&
4689 !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
4690 list_del_rcu(&key->list);
4691 kfree_rcu(key, rcu);
4692 goto unlock;
4693 }
4694
4695 if (persistent)
4696 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4697 else
4698 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4699
4700 unlock:
4701 hci_dev_unlock(hdev);
4702 }
4703
hci_clock_offset_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4704 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data,
4705 struct sk_buff *skb)
4706 {
4707 struct hci_ev_clock_offset *ev = data;
4708 struct hci_conn *conn;
4709
4710 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4711
4712 hci_dev_lock(hdev);
4713
4714 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4715 if (conn && !ev->status) {
4716 struct inquiry_entry *ie;
4717
4718 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4719 if (ie) {
4720 ie->data.clock_offset = ev->clock_offset;
4721 ie->timestamp = jiffies;
4722 }
4723 }
4724
4725 hci_dev_unlock(hdev);
4726 }
4727
hci_pkt_type_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4728 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data,
4729 struct sk_buff *skb)
4730 {
4731 struct hci_ev_pkt_type_change *ev = data;
4732 struct hci_conn *conn;
4733
4734 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4735
4736 hci_dev_lock(hdev);
4737
4738 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4739 if (conn && !ev->status)
4740 conn->pkt_type = __le16_to_cpu(ev->pkt_type);
4741
4742 hci_dev_unlock(hdev);
4743 }
4744
hci_pscan_rep_mode_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4745 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data,
4746 struct sk_buff *skb)
4747 {
4748 struct hci_ev_pscan_rep_mode *ev = data;
4749 struct inquiry_entry *ie;
4750
4751 bt_dev_dbg(hdev, "");
4752
4753 hci_dev_lock(hdev);
4754
4755 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
4756 if (ie) {
4757 ie->data.pscan_rep_mode = ev->pscan_rep_mode;
4758 ie->timestamp = jiffies;
4759 }
4760
4761 hci_dev_unlock(hdev);
4762 }
4763
hci_inquiry_result_with_rssi_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)4764 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
4765 struct sk_buff *skb)
4766 {
4767 struct hci_ev_inquiry_result_rssi *ev = edata;
4768 struct inquiry_data data;
4769 int i;
4770
4771 bt_dev_dbg(hdev, "num_rsp %d", ev->num);
4772
4773 if (!ev->num)
4774 return;
4775
4776 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
4777 return;
4778
4779 hci_dev_lock(hdev);
4780
4781 if (skb->len == array_size(ev->num,
4782 sizeof(struct inquiry_info_rssi_pscan))) {
4783 struct inquiry_info_rssi_pscan *info;
4784
4785 for (i = 0; i < ev->num; i++) {
4786 u32 flags;
4787
4788 info = hci_ev_skb_pull(hdev, skb,
4789 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4790 sizeof(*info));
4791 if (!info) {
4792 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4793 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4794 goto unlock;
4795 }
4796
4797 bacpy(&data.bdaddr, &info->bdaddr);
4798 data.pscan_rep_mode = info->pscan_rep_mode;
4799 data.pscan_period_mode = info->pscan_period_mode;
4800 data.pscan_mode = info->pscan_mode;
4801 memcpy(data.dev_class, info->dev_class, 3);
4802 data.clock_offset = info->clock_offset;
4803 data.rssi = info->rssi;
4804 data.ssp_mode = 0x00;
4805
4806 flags = hci_inquiry_cache_update(hdev, &data, false);
4807
4808 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4809 info->dev_class, info->rssi,
4810 flags, NULL, 0, NULL, 0, 0);
4811 }
4812 } else if (skb->len == array_size(ev->num,
4813 sizeof(struct inquiry_info_rssi))) {
4814 struct inquiry_info_rssi *info;
4815
4816 for (i = 0; i < ev->num; i++) {
4817 u32 flags;
4818
4819 info = hci_ev_skb_pull(hdev, skb,
4820 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4821 sizeof(*info));
4822 if (!info) {
4823 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4824 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4825 goto unlock;
4826 }
4827
4828 bacpy(&data.bdaddr, &info->bdaddr);
4829 data.pscan_rep_mode = info->pscan_rep_mode;
4830 data.pscan_period_mode = info->pscan_period_mode;
4831 data.pscan_mode = 0x00;
4832 memcpy(data.dev_class, info->dev_class, 3);
4833 data.clock_offset = info->clock_offset;
4834 data.rssi = info->rssi;
4835 data.ssp_mode = 0x00;
4836
4837 flags = hci_inquiry_cache_update(hdev, &data, false);
4838
4839 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4840 info->dev_class, info->rssi,
4841 flags, NULL, 0, NULL, 0, 0);
4842 }
4843 } else {
4844 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4845 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4846 }
4847 unlock:
4848 hci_dev_unlock(hdev);
4849 }
4850
hci_remote_ext_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4851 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data,
4852 struct sk_buff *skb)
4853 {
4854 struct hci_ev_remote_ext_features *ev = data;
4855 struct hci_conn *conn;
4856
4857 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4858
4859 hci_dev_lock(hdev);
4860
4861 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4862 if (!conn)
4863 goto unlock;
4864
4865 if (ev->page < HCI_MAX_PAGES)
4866 memcpy(conn->features[ev->page], ev->features, 8);
4867
4868 if (!ev->status && ev->page == 0x01) {
4869 struct inquiry_entry *ie;
4870
4871 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4872 if (ie)
4873 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4874
4875 if (ev->features[0] & LMP_HOST_SSP) {
4876 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4877 } else {
4878 /* It is mandatory by the Bluetooth specification that
4879 * Extended Inquiry Results are only used when Secure
4880 * Simple Pairing is enabled, but some devices violate
4881 * this.
4882 *
4883 * To make these devices work, the internal SSP
4884 * enabled flag needs to be cleared if the remote host
4885 * features do not indicate SSP support */
4886 clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4887 }
4888
4889 if (ev->features[0] & LMP_HOST_SC)
4890 set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
4891 }
4892
4893 if (conn->state != BT_CONFIG)
4894 goto unlock;
4895
4896 if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
4897 struct hci_cp_remote_name_req cp;
4898 memset(&cp, 0, sizeof(cp));
4899 bacpy(&cp.bdaddr, &conn->dst);
4900 cp.pscan_rep_mode = 0x02;
4901 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
4902 } else {
4903 mgmt_device_connected(hdev, conn, NULL, 0);
4904 }
4905
4906 if (!hci_outgoing_auth_needed(hdev, conn)) {
4907 conn->state = BT_CONNECTED;
4908 hci_connect_cfm(conn, ev->status);
4909 hci_conn_drop(conn);
4910 }
4911
4912 unlock:
4913 hci_dev_unlock(hdev);
4914 }
4915
hci_sync_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4916 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
4917 struct sk_buff *skb)
4918 {
4919 struct hci_ev_sync_conn_complete *ev = data;
4920 struct hci_conn *conn;
4921 u8 status = ev->status;
4922
4923 switch (ev->link_type) {
4924 case SCO_LINK:
4925 case ESCO_LINK:
4926 break;
4927 default:
4928 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
4929 * for HCI_Synchronous_Connection_Complete is limited to
4930 * either SCO or eSCO
4931 */
4932 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
4933 return;
4934 }
4935
4936 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4937
4938 hci_dev_lock(hdev);
4939
4940 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
4941 if (!conn) {
4942 if (ev->link_type == ESCO_LINK)
4943 goto unlock;
4944
4945 /* When the link type in the event indicates SCO connection
4946 * and lookup of the connection object fails, then check
4947 * if an eSCO connection object exists.
4948 *
4949 * The core limits the synchronous connections to either
4950 * SCO or eSCO. The eSCO connection is preferred and tried
4951 * to be setup first and until successfully established,
4952 * the link type will be hinted as eSCO.
4953 */
4954 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
4955 if (!conn)
4956 goto unlock;
4957 }
4958
4959 /* The HCI_Synchronous_Connection_Complete event is only sent once per connection.
4960 * Processing it more than once per connection can corrupt kernel memory.
4961 *
4962 * As the connection handle is set here for the first time, it indicates
4963 * whether the connection is already set up.
4964 */
4965 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
4966 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection");
4967 goto unlock;
4968 }
4969
4970 switch (status) {
4971 case 0x00:
4972 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
4973 if (status) {
4974 conn->state = BT_CLOSED;
4975 break;
4976 }
4977
4978 conn->state = BT_CONNECTED;
4979 conn->type = ev->link_type;
4980
4981 hci_debugfs_create_conn(conn);
4982 hci_conn_add_sysfs(conn);
4983 break;
4984
4985 case 0x10: /* Connection Accept Timeout */
4986 case 0x0d: /* Connection Rejected due to Limited Resources */
4987 case 0x11: /* Unsupported Feature or Parameter Value */
4988 case 0x1c: /* SCO interval rejected */
4989 case 0x1a: /* Unsupported Remote Feature */
4990 case 0x1e: /* Invalid LMP Parameters */
4991 case 0x1f: /* Unspecified error */
4992 case 0x20: /* Unsupported LMP Parameter value */
4993 if (conn->out) {
4994 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
4995 (hdev->esco_type & EDR_ESCO_MASK);
4996 if (hci_setup_sync(conn, conn->parent->handle))
4997 goto unlock;
4998 }
4999 fallthrough;
5000
5001 default:
5002 conn->state = BT_CLOSED;
5003 break;
5004 }
5005
5006 bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode);
5007 /* Notify only in case of SCO over HCI transport data path which
5008 * is zero and non-zero value shall be non-HCI transport data path
5009 */
5010 if (conn->codec.data_path == 0 && hdev->notify) {
5011 switch (ev->air_mode) {
5012 case 0x02:
5013 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
5014 break;
5015 case 0x03:
5016 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP);
5017 break;
5018 }
5019 }
5020
5021 hci_connect_cfm(conn, status);
5022 if (status)
5023 hci_conn_del(conn);
5024
5025 unlock:
5026 hci_dev_unlock(hdev);
5027 }
5028
eir_get_length(u8 * eir,size_t eir_len)5029 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
5030 {
5031 size_t parsed = 0;
5032
5033 while (parsed < eir_len) {
5034 u8 field_len = eir[0];
5035
5036 if (field_len == 0)
5037 return parsed;
5038
5039 parsed += field_len + 1;
5040 eir += field_len + 1;
5041 }
5042
5043 return eir_len;
5044 }
5045
hci_extended_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5046 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata,
5047 struct sk_buff *skb)
5048 {
5049 struct hci_ev_ext_inquiry_result *ev = edata;
5050 struct inquiry_data data;
5051 size_t eir_len;
5052 int i;
5053
5054 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT,
5055 flex_array_size(ev, info, ev->num)))
5056 return;
5057
5058 bt_dev_dbg(hdev, "num %d", ev->num);
5059
5060 if (!ev->num)
5061 return;
5062
5063 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
5064 return;
5065
5066 hci_dev_lock(hdev);
5067
5068 for (i = 0; i < ev->num; i++) {
5069 struct extended_inquiry_info *info = &ev->info[i];
5070 u32 flags;
5071 bool name_known;
5072
5073 bacpy(&data.bdaddr, &info->bdaddr);
5074 data.pscan_rep_mode = info->pscan_rep_mode;
5075 data.pscan_period_mode = info->pscan_period_mode;
5076 data.pscan_mode = 0x00;
5077 memcpy(data.dev_class, info->dev_class, 3);
5078 data.clock_offset = info->clock_offset;
5079 data.rssi = info->rssi;
5080 data.ssp_mode = 0x01;
5081
5082 if (hci_dev_test_flag(hdev, HCI_MGMT))
5083 name_known = eir_get_data(info->data,
5084 sizeof(info->data),
5085 EIR_NAME_COMPLETE, NULL);
5086 else
5087 name_known = true;
5088
5089 flags = hci_inquiry_cache_update(hdev, &data, name_known);
5090
5091 eir_len = eir_get_length(info->data, sizeof(info->data));
5092
5093 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
5094 info->dev_class, info->rssi,
5095 flags, info->data, eir_len, NULL, 0, 0);
5096 }
5097
5098 hci_dev_unlock(hdev);
5099 }
5100
hci_key_refresh_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5101 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data,
5102 struct sk_buff *skb)
5103 {
5104 struct hci_ev_key_refresh_complete *ev = data;
5105 struct hci_conn *conn;
5106
5107 bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status,
5108 __le16_to_cpu(ev->handle));
5109
5110 hci_dev_lock(hdev);
5111
5112 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5113 if (!conn)
5114 goto unlock;
5115
5116 /* For BR/EDR the necessary steps are taken through the
5117 * auth_complete event.
5118 */
5119 if (conn->type != LE_LINK)
5120 goto unlock;
5121
5122 if (!ev->status)
5123 conn->sec_level = conn->pending_sec_level;
5124
5125 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
5126
5127 if (ev->status && conn->state == BT_CONNECTED) {
5128 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
5129 hci_conn_drop(conn);
5130 goto unlock;
5131 }
5132
5133 if (conn->state == BT_CONFIG) {
5134 if (!ev->status)
5135 conn->state = BT_CONNECTED;
5136
5137 hci_connect_cfm(conn, ev->status);
5138 hci_conn_drop(conn);
5139 } else {
5140 hci_auth_cfm(conn, ev->status);
5141
5142 hci_conn_hold(conn);
5143 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
5144 hci_conn_drop(conn);
5145 }
5146
5147 unlock:
5148 hci_dev_unlock(hdev);
5149 }
5150
hci_get_auth_req(struct hci_conn * conn)5151 static u8 hci_get_auth_req(struct hci_conn *conn)
5152 {
5153 /* If remote requests no-bonding follow that lead */
5154 if (conn->remote_auth == HCI_AT_NO_BONDING ||
5155 conn->remote_auth == HCI_AT_NO_BONDING_MITM)
5156 return conn->remote_auth | (conn->auth_type & 0x01);
5157
5158 /* If both remote and local have enough IO capabilities, require
5159 * MITM protection
5160 */
5161 if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
5162 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
5163 return conn->remote_auth | 0x01;
5164
5165 /* No MITM protection possible so ignore remote requirement */
5166 return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
5167 }
5168
bredr_oob_data_present(struct hci_conn * conn)5169 static u8 bredr_oob_data_present(struct hci_conn *conn)
5170 {
5171 struct hci_dev *hdev = conn->hdev;
5172 struct oob_data *data;
5173
5174 data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
5175 if (!data)
5176 return 0x00;
5177
5178 if (bredr_sc_enabled(hdev)) {
5179 /* When Secure Connections is enabled, then just
5180 * return the present value stored with the OOB
5181 * data. The stored value contains the right present
5182 * information. However it can only be trusted when
5183 * not in Secure Connection Only mode.
5184 */
5185 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
5186 return data->present;
5187
5188 /* When Secure Connections Only mode is enabled, then
5189 * the P-256 values are required. If they are not
5190 * available, then do not declare that OOB data is
5191 * present.
5192 */
5193 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
5194 !crypto_memneq(data->hash256, ZERO_KEY, 16))
5195 return 0x00;
5196
5197 return 0x02;
5198 }
5199
5200 /* When Secure Connections is not enabled or actually
5201 * not supported by the hardware, then check that if
5202 * P-192 data values are present.
5203 */
5204 if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
5205 !crypto_memneq(data->hash192, ZERO_KEY, 16))
5206 return 0x00;
5207
5208 return 0x01;
5209 }
5210
hci_io_capa_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5211 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data,
5212 struct sk_buff *skb)
5213 {
5214 struct hci_ev_io_capa_request *ev = data;
5215 struct hci_conn *conn;
5216
5217 bt_dev_dbg(hdev, "");
5218
5219 hci_dev_lock(hdev);
5220
5221 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5222 if (!conn || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
5223 goto unlock;
5224
5225 /* Assume remote supports SSP since it has triggered this event */
5226 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
5227
5228 hci_conn_hold(conn);
5229
5230 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5231 goto unlock;
5232
5233 /* Allow pairing if we're pairable, the initiators of the
5234 * pairing or if the remote is not requesting bonding.
5235 */
5236 if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
5237 test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
5238 (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
5239 struct hci_cp_io_capability_reply cp;
5240
5241 bacpy(&cp.bdaddr, &ev->bdaddr);
5242 /* Change the IO capability from KeyboardDisplay
5243 * to DisplayYesNo as it is not supported by BT spec. */
5244 cp.capability = (conn->io_capability == 0x04) ?
5245 HCI_IO_DISPLAY_YESNO : conn->io_capability;
5246
5247 /* If we are initiators, there is no remote information yet */
5248 if (conn->remote_auth == 0xff) {
5249 /* Request MITM protection if our IO caps allow it
5250 * except for the no-bonding case.
5251 */
5252 if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5253 conn->auth_type != HCI_AT_NO_BONDING)
5254 conn->auth_type |= 0x01;
5255 } else {
5256 conn->auth_type = hci_get_auth_req(conn);
5257 }
5258
5259 /* If we're not bondable, force one of the non-bondable
5260 * authentication requirement values.
5261 */
5262 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
5263 conn->auth_type &= HCI_AT_NO_BONDING_MITM;
5264
5265 cp.authentication = conn->auth_type;
5266 cp.oob_data = bredr_oob_data_present(conn);
5267
5268 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
5269 sizeof(cp), &cp);
5270 } else {
5271 struct hci_cp_io_capability_neg_reply cp;
5272
5273 bacpy(&cp.bdaddr, &ev->bdaddr);
5274 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
5275
5276 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
5277 sizeof(cp), &cp);
5278 }
5279
5280 unlock:
5281 hci_dev_unlock(hdev);
5282 }
5283
hci_io_capa_reply_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5284 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data,
5285 struct sk_buff *skb)
5286 {
5287 struct hci_ev_io_capa_reply *ev = data;
5288 struct hci_conn *conn;
5289
5290 bt_dev_dbg(hdev, "");
5291
5292 hci_dev_lock(hdev);
5293
5294 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5295 if (!conn)
5296 goto unlock;
5297
5298 conn->remote_cap = ev->capability;
5299 conn->remote_auth = ev->authentication;
5300
5301 unlock:
5302 hci_dev_unlock(hdev);
5303 }
5304
hci_user_confirm_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5305 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data,
5306 struct sk_buff *skb)
5307 {
5308 struct hci_ev_user_confirm_req *ev = data;
5309 int loc_mitm, rem_mitm, confirm_hint = 0;
5310 struct hci_conn *conn;
5311
5312 bt_dev_dbg(hdev, "");
5313
5314 hci_dev_lock(hdev);
5315
5316 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5317 goto unlock;
5318
5319 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5320 if (!conn)
5321 goto unlock;
5322
5323 loc_mitm = (conn->auth_type & 0x01);
5324 rem_mitm = (conn->remote_auth & 0x01);
5325
5326 /* If we require MITM but the remote device can't provide that
5327 * (it has NoInputNoOutput) then reject the confirmation
5328 * request. We check the security level here since it doesn't
5329 * necessarily match conn->auth_type.
5330 */
5331 if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
5332 conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
5333 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM");
5334 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
5335 sizeof(ev->bdaddr), &ev->bdaddr);
5336 goto unlock;
5337 }
5338
5339 /* If no side requires MITM protection; use JUST_CFM method */
5340 if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
5341 (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
5342
5343 /* If we're not the initiator of request authorization and the
5344 * local IO capability is not NoInputNoOutput, use JUST_WORKS
5345 * method (mgmt_user_confirm with confirm_hint set to 1).
5346 */
5347 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5348 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) {
5349 bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5350 confirm_hint = 1;
5351 goto confirm;
5352 }
5353
5354 /* If there already exists link key in local host, leave the
5355 * decision to user space since the remote device could be
5356 * legitimate or malicious.
5357 */
5358 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5359 bt_dev_dbg(hdev, "Local host already has link key");
5360 confirm_hint = 1;
5361 goto confirm;
5362 }
5363
5364 BT_DBG("Auto-accept of user confirmation with %ums delay",
5365 hdev->auto_accept_delay);
5366
5367 if (hdev->auto_accept_delay > 0) {
5368 int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5369 queue_delayed_work(conn->hdev->workqueue,
5370 &conn->auto_accept_work, delay);
5371 goto unlock;
5372 }
5373
5374 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5375 sizeof(ev->bdaddr), &ev->bdaddr);
5376 goto unlock;
5377 }
5378
5379 confirm:
5380 mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5381 le32_to_cpu(ev->passkey), confirm_hint);
5382
5383 unlock:
5384 hci_dev_unlock(hdev);
5385 }
5386
hci_user_passkey_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5387 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5388 struct sk_buff *skb)
5389 {
5390 struct hci_ev_user_passkey_req *ev = data;
5391
5392 bt_dev_dbg(hdev, "");
5393
5394 if (hci_dev_test_flag(hdev, HCI_MGMT))
5395 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5396 }
5397
hci_user_passkey_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5398 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5399 struct sk_buff *skb)
5400 {
5401 struct hci_ev_user_passkey_notify *ev = data;
5402 struct hci_conn *conn;
5403
5404 bt_dev_dbg(hdev, "");
5405
5406 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5407 if (!conn)
5408 return;
5409
5410 conn->passkey_notify = __le32_to_cpu(ev->passkey);
5411 conn->passkey_entered = 0;
5412
5413 if (hci_dev_test_flag(hdev, HCI_MGMT))
5414 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5415 conn->dst_type, conn->passkey_notify,
5416 conn->passkey_entered);
5417 }
5418
hci_keypress_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5419 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5420 struct sk_buff *skb)
5421 {
5422 struct hci_ev_keypress_notify *ev = data;
5423 struct hci_conn *conn;
5424
5425 bt_dev_dbg(hdev, "");
5426
5427 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5428 if (!conn)
5429 return;
5430
5431 switch (ev->type) {
5432 case HCI_KEYPRESS_STARTED:
5433 conn->passkey_entered = 0;
5434 return;
5435
5436 case HCI_KEYPRESS_ENTERED:
5437 conn->passkey_entered++;
5438 break;
5439
5440 case HCI_KEYPRESS_ERASED:
5441 conn->passkey_entered--;
5442 break;
5443
5444 case HCI_KEYPRESS_CLEARED:
5445 conn->passkey_entered = 0;
5446 break;
5447
5448 case HCI_KEYPRESS_COMPLETED:
5449 return;
5450 }
5451
5452 if (hci_dev_test_flag(hdev, HCI_MGMT))
5453 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5454 conn->dst_type, conn->passkey_notify,
5455 conn->passkey_entered);
5456 }
5457
hci_simple_pair_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5458 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5459 struct sk_buff *skb)
5460 {
5461 struct hci_ev_simple_pair_complete *ev = data;
5462 struct hci_conn *conn;
5463
5464 bt_dev_dbg(hdev, "");
5465
5466 hci_dev_lock(hdev);
5467
5468 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5469 if (!conn || !hci_conn_ssp_enabled(conn))
5470 goto unlock;
5471
5472 /* Reset the authentication requirement to unknown */
5473 conn->remote_auth = 0xff;
5474
5475 /* To avoid duplicate auth_failed events to user space we check
5476 * the HCI_CONN_AUTH_PEND flag which will be set if we
5477 * initiated the authentication. A traditional auth_complete
5478 * event gets always produced as initiator and is also mapped to
5479 * the mgmt_auth_failed event */
5480 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5481 mgmt_auth_failed(conn, ev->status);
5482
5483 hci_conn_drop(conn);
5484
5485 unlock:
5486 hci_dev_unlock(hdev);
5487 }
5488
hci_remote_host_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5489 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5490 struct sk_buff *skb)
5491 {
5492 struct hci_ev_remote_host_features *ev = data;
5493 struct inquiry_entry *ie;
5494 struct hci_conn *conn;
5495
5496 bt_dev_dbg(hdev, "");
5497
5498 hci_dev_lock(hdev);
5499
5500 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5501 if (conn)
5502 memcpy(conn->features[1], ev->features, 8);
5503
5504 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5505 if (ie)
5506 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5507
5508 hci_dev_unlock(hdev);
5509 }
5510
hci_remote_oob_data_request_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5511 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5512 struct sk_buff *skb)
5513 {
5514 struct hci_ev_remote_oob_data_request *ev = edata;
5515 struct oob_data *data;
5516
5517 bt_dev_dbg(hdev, "");
5518
5519 hci_dev_lock(hdev);
5520
5521 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5522 goto unlock;
5523
5524 data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5525 if (!data) {
5526 struct hci_cp_remote_oob_data_neg_reply cp;
5527
5528 bacpy(&cp.bdaddr, &ev->bdaddr);
5529 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5530 sizeof(cp), &cp);
5531 goto unlock;
5532 }
5533
5534 if (bredr_sc_enabled(hdev)) {
5535 struct hci_cp_remote_oob_ext_data_reply cp;
5536
5537 bacpy(&cp.bdaddr, &ev->bdaddr);
5538 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5539 memset(cp.hash192, 0, sizeof(cp.hash192));
5540 memset(cp.rand192, 0, sizeof(cp.rand192));
5541 } else {
5542 memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5543 memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5544 }
5545 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5546 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5547
5548 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5549 sizeof(cp), &cp);
5550 } else {
5551 struct hci_cp_remote_oob_data_reply cp;
5552
5553 bacpy(&cp.bdaddr, &ev->bdaddr);
5554 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5555 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5556
5557 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5558 sizeof(cp), &cp);
5559 }
5560
5561 unlock:
5562 hci_dev_unlock(hdev);
5563 }
5564
le_conn_update_addr(struct hci_conn * conn,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * local_rpa)5565 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5566 u8 bdaddr_type, bdaddr_t *local_rpa)
5567 {
5568 if (conn->out) {
5569 conn->dst_type = bdaddr_type;
5570 conn->resp_addr_type = bdaddr_type;
5571 bacpy(&conn->resp_addr, bdaddr);
5572
5573 /* Check if the controller has set a Local RPA then it must be
5574 * used instead or hdev->rpa.
5575 */
5576 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5577 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5578 bacpy(&conn->init_addr, local_rpa);
5579 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5580 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5581 bacpy(&conn->init_addr, &conn->hdev->rpa);
5582 } else {
5583 hci_copy_identity_address(conn->hdev, &conn->init_addr,
5584 &conn->init_addr_type);
5585 }
5586 } else {
5587 conn->resp_addr_type = conn->hdev->adv_addr_type;
5588 /* Check if the controller has set a Local RPA then it must be
5589 * used instead or hdev->rpa.
5590 */
5591 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5592 conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5593 bacpy(&conn->resp_addr, local_rpa);
5594 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5595 /* In case of ext adv, resp_addr will be updated in
5596 * Adv Terminated event.
5597 */
5598 if (!ext_adv_capable(conn->hdev))
5599 bacpy(&conn->resp_addr,
5600 &conn->hdev->random_addr);
5601 } else {
5602 bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5603 }
5604
5605 conn->init_addr_type = bdaddr_type;
5606 bacpy(&conn->init_addr, bdaddr);
5607
5608 /* For incoming connections, set the default minimum
5609 * and maximum connection interval. They will be used
5610 * to check if the parameters are in range and if not
5611 * trigger the connection update procedure.
5612 */
5613 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5614 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5615 }
5616 }
5617
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)5618 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5619 bdaddr_t *bdaddr, u8 bdaddr_type,
5620 bdaddr_t *local_rpa, u8 role, u16 handle,
5621 u16 interval, u16 latency,
5622 u16 supervision_timeout)
5623 {
5624 struct hci_conn_params *params;
5625 struct hci_conn *conn;
5626 struct smp_irk *irk;
5627 u8 addr_type;
5628
5629 hci_dev_lock(hdev);
5630
5631 /* All controllers implicitly stop advertising in the event of a
5632 * connection, so ensure that the state bit is cleared.
5633 */
5634 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5635
5636 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
5637 if (!conn) {
5638 /* In case of error status and there is no connection pending
5639 * just unlock as there is nothing to cleanup.
5640 */
5641 if (status)
5642 goto unlock;
5643
5644 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
5645 if (IS_ERR(conn)) {
5646 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
5647 goto unlock;
5648 }
5649
5650 conn->dst_type = bdaddr_type;
5651
5652 /* If we didn't have a hci_conn object previously
5653 * but we're in central role this must be something
5654 * initiated using an accept list. Since accept list based
5655 * connections are not "first class citizens" we don't
5656 * have full tracking of them. Therefore, we go ahead
5657 * with a "best effort" approach of determining the
5658 * initiator address based on the HCI_PRIVACY flag.
5659 */
5660 if (conn->out) {
5661 conn->resp_addr_type = bdaddr_type;
5662 bacpy(&conn->resp_addr, bdaddr);
5663 if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5664 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5665 bacpy(&conn->init_addr, &hdev->rpa);
5666 } else {
5667 hci_copy_identity_address(hdev,
5668 &conn->init_addr,
5669 &conn->init_addr_type);
5670 }
5671 }
5672 } else {
5673 cancel_delayed_work(&conn->le_conn_timeout);
5674 }
5675
5676 /* The HCI_LE_Connection_Complete event is only sent once per connection.
5677 * Processing it more than once per connection can corrupt kernel memory.
5678 *
5679 * As the connection handle is set here for the first time, it indicates
5680 * whether the connection is already set up.
5681 */
5682 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5683 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5684 goto unlock;
5685 }
5686
5687 le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5688
5689 /* Lookup the identity address from the stored connection
5690 * address and address type.
5691 *
5692 * When establishing connections to an identity address, the
5693 * connection procedure will store the resolvable random
5694 * address first. Now if it can be converted back into the
5695 * identity address, start using the identity address from
5696 * now on.
5697 */
5698 irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5699 if (irk) {
5700 bacpy(&conn->dst, &irk->bdaddr);
5701 conn->dst_type = irk->addr_type;
5702 }
5703
5704 conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5705
5706 /* All connection failure handling is taken care of by the
5707 * hci_conn_failed function which is triggered by the HCI
5708 * request completion callbacks used for connecting.
5709 */
5710 if (status || hci_conn_set_handle(conn, handle))
5711 goto unlock;
5712
5713 /* Drop the connection if it has been aborted */
5714 if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5715 hci_conn_drop(conn);
5716 goto unlock;
5717 }
5718
5719 if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5720 addr_type = BDADDR_LE_PUBLIC;
5721 else
5722 addr_type = BDADDR_LE_RANDOM;
5723
5724 /* Drop the connection if the device is blocked */
5725 if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5726 hci_conn_drop(conn);
5727 goto unlock;
5728 }
5729
5730 mgmt_device_connected(hdev, conn, NULL, 0);
5731
5732 conn->sec_level = BT_SECURITY_LOW;
5733 conn->state = BT_CONFIG;
5734
5735 /* Store current advertising instance as connection advertising instance
5736 * when sotfware rotation is in use so it can be re-enabled when
5737 * disconnected.
5738 */
5739 if (!ext_adv_capable(hdev))
5740 conn->adv_instance = hdev->cur_adv_instance;
5741
5742 conn->le_conn_interval = interval;
5743 conn->le_conn_latency = latency;
5744 conn->le_supv_timeout = supervision_timeout;
5745
5746 hci_debugfs_create_conn(conn);
5747 hci_conn_add_sysfs(conn);
5748
5749 /* The remote features procedure is defined for central
5750 * role only. So only in case of an initiated connection
5751 * request the remote features.
5752 *
5753 * If the local controller supports peripheral-initiated features
5754 * exchange, then requesting the remote features in peripheral
5755 * role is possible. Otherwise just transition into the
5756 * connected state without requesting the remote features.
5757 */
5758 if (conn->out ||
5759 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
5760 struct hci_cp_le_read_remote_features cp;
5761
5762 cp.handle = __cpu_to_le16(conn->handle);
5763
5764 hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
5765 sizeof(cp), &cp);
5766
5767 hci_conn_hold(conn);
5768 } else {
5769 conn->state = BT_CONNECTED;
5770 hci_connect_cfm(conn, status);
5771 }
5772
5773 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
5774 conn->dst_type);
5775 if (params) {
5776 hci_pend_le_list_del_init(params);
5777 if (params->conn) {
5778 hci_conn_drop(params->conn);
5779 hci_conn_put(params->conn);
5780 params->conn = NULL;
5781 }
5782 }
5783
5784 unlock:
5785 hci_update_passive_scan(hdev);
5786 hci_dev_unlock(hdev);
5787 }
5788
hci_le_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5789 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
5790 struct sk_buff *skb)
5791 {
5792 struct hci_ev_le_conn_complete *ev = data;
5793
5794 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5795
5796 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5797 NULL, ev->role, le16_to_cpu(ev->handle),
5798 le16_to_cpu(ev->interval),
5799 le16_to_cpu(ev->latency),
5800 le16_to_cpu(ev->supervision_timeout));
5801 }
5802
hci_le_enh_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5803 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
5804 struct sk_buff *skb)
5805 {
5806 struct hci_ev_le_enh_conn_complete *ev = data;
5807
5808 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5809
5810 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5811 &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
5812 le16_to_cpu(ev->interval),
5813 le16_to_cpu(ev->latency),
5814 le16_to_cpu(ev->supervision_timeout));
5815 }
5816
hci_le_ext_adv_term_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5817 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
5818 struct sk_buff *skb)
5819 {
5820 struct hci_evt_le_ext_adv_set_term *ev = data;
5821 struct hci_conn *conn;
5822 struct adv_info *adv, *n;
5823
5824 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5825
5826 /* The Bluetooth Core 5.3 specification clearly states that this event
5827 * shall not be sent when the Host disables the advertising set. So in
5828 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
5829 *
5830 * When the Host disables an advertising set, all cleanup is done via
5831 * its command callback and not needed to be duplicated here.
5832 */
5833 if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
5834 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
5835 return;
5836 }
5837
5838 hci_dev_lock(hdev);
5839
5840 adv = hci_find_adv_instance(hdev, ev->handle);
5841
5842 if (ev->status) {
5843 if (!adv)
5844 goto unlock;
5845
5846 /* Remove advertising as it has been terminated */
5847 hci_remove_adv_instance(hdev, ev->handle);
5848 mgmt_advertising_removed(NULL, hdev, ev->handle);
5849
5850 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
5851 if (adv->enabled)
5852 goto unlock;
5853 }
5854
5855 /* We are no longer advertising, clear HCI_LE_ADV */
5856 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5857 goto unlock;
5858 }
5859
5860 if (adv)
5861 adv->enabled = false;
5862
5863 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
5864 if (conn) {
5865 /* Store handle in the connection so the correct advertising
5866 * instance can be re-enabled when disconnected.
5867 */
5868 conn->adv_instance = ev->handle;
5869
5870 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
5871 bacmp(&conn->resp_addr, BDADDR_ANY))
5872 goto unlock;
5873
5874 if (!ev->handle) {
5875 bacpy(&conn->resp_addr, &hdev->random_addr);
5876 goto unlock;
5877 }
5878
5879 if (adv)
5880 bacpy(&conn->resp_addr, &adv->random_addr);
5881 }
5882
5883 unlock:
5884 hci_dev_unlock(hdev);
5885 }
5886
hci_le_conn_update_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5887 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
5888 struct sk_buff *skb)
5889 {
5890 struct hci_ev_le_conn_update_complete *ev = data;
5891 struct hci_conn *conn;
5892
5893 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5894
5895 if (ev->status)
5896 return;
5897
5898 hci_dev_lock(hdev);
5899
5900 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5901 if (conn) {
5902 conn->le_conn_interval = le16_to_cpu(ev->interval);
5903 conn->le_conn_latency = le16_to_cpu(ev->latency);
5904 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
5905 }
5906
5907 hci_dev_unlock(hdev);
5908 }
5909
5910 /* 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)5911 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
5912 bdaddr_t *addr,
5913 u8 addr_type, bool addr_resolved,
5914 u8 adv_type, u8 phy, u8 sec_phy)
5915 {
5916 struct hci_conn *conn;
5917 struct hci_conn_params *params;
5918
5919 /* If the event is not connectable don't proceed further */
5920 if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
5921 return NULL;
5922
5923 /* Ignore if the device is blocked or hdev is suspended */
5924 if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
5925 hdev->suspended)
5926 return NULL;
5927
5928 /* Most controller will fail if we try to create new connections
5929 * while we have an existing one in peripheral role.
5930 */
5931 if (hdev->conn_hash.le_num_peripheral > 0 &&
5932 (test_bit(HCI_QUIRK_BROKEN_LE_STATES, &hdev->quirks) ||
5933 !(hdev->le_states[3] & 0x10)))
5934 return NULL;
5935
5936 /* If we're not connectable only connect devices that we have in
5937 * our pend_le_conns list.
5938 */
5939 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
5940 addr_type);
5941 if (!params)
5942 return NULL;
5943
5944 if (!params->explicit_connect) {
5945 switch (params->auto_connect) {
5946 case HCI_AUTO_CONN_DIRECT:
5947 /* Only devices advertising with ADV_DIRECT_IND are
5948 * triggering a connection attempt. This is allowing
5949 * incoming connections from peripheral devices.
5950 */
5951 if (adv_type != LE_ADV_DIRECT_IND)
5952 return NULL;
5953 break;
5954 case HCI_AUTO_CONN_ALWAYS:
5955 /* Devices advertising with ADV_IND or ADV_DIRECT_IND
5956 * are triggering a connection attempt. This means
5957 * that incoming connections from peripheral device are
5958 * accepted and also outgoing connections to peripheral
5959 * devices are established when found.
5960 */
5961 break;
5962 default:
5963 return NULL;
5964 }
5965 }
5966
5967 conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
5968 BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
5969 HCI_ROLE_MASTER, phy, sec_phy);
5970 if (!IS_ERR(conn)) {
5971 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
5972 * by higher layer that tried to connect, if no then
5973 * store the pointer since we don't really have any
5974 * other owner of the object besides the params that
5975 * triggered it. This way we can abort the connection if
5976 * the parameters get removed and keep the reference
5977 * count consistent once the connection is established.
5978 */
5979
5980 if (!params->explicit_connect)
5981 params->conn = hci_conn_get(conn);
5982
5983 return conn;
5984 }
5985
5986 switch (PTR_ERR(conn)) {
5987 case -EBUSY:
5988 /* If hci_connect() returns -EBUSY it means there is already
5989 * an LE connection attempt going on. Since controllers don't
5990 * support more than one connection attempt at the time, we
5991 * don't consider this an error case.
5992 */
5993 break;
5994 default:
5995 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
5996 return NULL;
5997 }
5998
5999 return NULL;
6000 }
6001
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)6002 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
6003 u8 bdaddr_type, bdaddr_t *direct_addr,
6004 u8 direct_addr_type, u8 phy, u8 sec_phy, s8 rssi,
6005 u8 *data, u8 len, bool ext_adv, bool ctl_time,
6006 u64 instant)
6007 {
6008 struct discovery_state *d = &hdev->discovery;
6009 struct smp_irk *irk;
6010 struct hci_conn *conn;
6011 bool match, bdaddr_resolved;
6012 u32 flags;
6013 u8 *ptr;
6014
6015 switch (type) {
6016 case LE_ADV_IND:
6017 case LE_ADV_DIRECT_IND:
6018 case LE_ADV_SCAN_IND:
6019 case LE_ADV_NONCONN_IND:
6020 case LE_ADV_SCAN_RSP:
6021 break;
6022 default:
6023 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6024 "type: 0x%02x", type);
6025 return;
6026 }
6027
6028 if (len > max_adv_len(hdev)) {
6029 bt_dev_err_ratelimited(hdev,
6030 "adv larger than maximum supported");
6031 return;
6032 }
6033
6034 /* Find the end of the data in case the report contains padded zero
6035 * bytes at the end causing an invalid length value.
6036 *
6037 * When data is NULL, len is 0 so there is no need for extra ptr
6038 * check as 'ptr < data + 0' is already false in such case.
6039 */
6040 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6041 if (ptr + 1 + *ptr > data + len)
6042 break;
6043 }
6044
6045 /* Adjust for actual length. This handles the case when remote
6046 * device is advertising with incorrect data length.
6047 */
6048 len = ptr - data;
6049
6050 /* If the direct address is present, then this report is from
6051 * a LE Direct Advertising Report event. In that case it is
6052 * important to see if the address is matching the local
6053 * controller address.
6054 */
6055 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr) {
6056 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6057 &bdaddr_resolved);
6058
6059 /* Only resolvable random addresses are valid for these
6060 * kind of reports and others can be ignored.
6061 */
6062 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6063 return;
6064
6065 /* If the controller is not using resolvable random
6066 * addresses, then this report can be ignored.
6067 */
6068 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
6069 return;
6070
6071 /* If the local IRK of the controller does not match
6072 * with the resolvable random address provided, then
6073 * this report can be ignored.
6074 */
6075 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6076 return;
6077 }
6078
6079 /* Check if we need to convert to identity address */
6080 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6081 if (irk) {
6082 bdaddr = &irk->bdaddr;
6083 bdaddr_type = irk->addr_type;
6084 }
6085
6086 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6087
6088 /* Check if we have been requested to connect to this device.
6089 *
6090 * direct_addr is set only for directed advertising reports (it is NULL
6091 * for advertising reports) and is already verified to be RPA above.
6092 */
6093 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6094 type, phy, sec_phy);
6095 if (!ext_adv && conn && type == LE_ADV_IND &&
6096 len <= max_adv_len(hdev)) {
6097 /* Store report for later inclusion by
6098 * mgmt_device_connected
6099 */
6100 memcpy(conn->le_adv_data, data, len);
6101 conn->le_adv_data_len = len;
6102 }
6103
6104 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6105 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6106 else
6107 flags = 0;
6108
6109 /* All scan results should be sent up for Mesh systems */
6110 if (hci_dev_test_flag(hdev, HCI_MESH)) {
6111 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6112 rssi, flags, data, len, NULL, 0, instant);
6113 return;
6114 }
6115
6116 /* Passive scanning shouldn't trigger any device found events,
6117 * except for devices marked as CONN_REPORT for which we do send
6118 * device found events, or advertisement monitoring requested.
6119 */
6120 if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6121 if (type == LE_ADV_DIRECT_IND)
6122 return;
6123
6124 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6125 bdaddr, bdaddr_type) &&
6126 idr_is_empty(&hdev->adv_monitors_idr))
6127 return;
6128
6129 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6130 rssi, flags, data, len, NULL, 0, 0);
6131 return;
6132 }
6133
6134 /* When receiving a scan response, then there is no way to
6135 * know if the remote device is connectable or not. However
6136 * since scan responses are merged with a previously seen
6137 * advertising report, the flags field from that report
6138 * will be used.
6139 *
6140 * In the unlikely case that a controller just sends a scan
6141 * response event that doesn't match the pending report, then
6142 * it is marked as a standalone SCAN_RSP.
6143 */
6144 if (type == LE_ADV_SCAN_RSP)
6145 flags = MGMT_DEV_FOUND_SCAN_RSP;
6146
6147 /* If there's nothing pending either store the data from this
6148 * event or send an immediate device found event if the data
6149 * should not be stored for later.
6150 */
6151 if (!ext_adv && !has_pending_adv_report(hdev)) {
6152 /* If the report will trigger a SCAN_REQ store it for
6153 * later merging.
6154 */
6155 if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) {
6156 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6157 rssi, flags, data, len);
6158 return;
6159 }
6160
6161 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6162 rssi, flags, data, len, NULL, 0, 0);
6163 return;
6164 }
6165
6166 /* Check if the pending report is for the same device as the new one */
6167 match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6168 bdaddr_type == d->last_adv_addr_type);
6169
6170 /* If the pending data doesn't match this report or this isn't a
6171 * scan response (e.g. we got a duplicate ADV_IND) then force
6172 * sending of the pending data.
6173 */
6174 if (type != LE_ADV_SCAN_RSP || !match) {
6175 /* Send out whatever is in the cache, but skip duplicates */
6176 if (!match)
6177 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6178 d->last_adv_addr_type, NULL,
6179 d->last_adv_rssi, d->last_adv_flags,
6180 d->last_adv_data,
6181 d->last_adv_data_len, NULL, 0, 0);
6182
6183 /* If the new report will trigger a SCAN_REQ store it for
6184 * later merging.
6185 */
6186 if (!ext_adv && (type == LE_ADV_IND ||
6187 type == LE_ADV_SCAN_IND)) {
6188 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6189 rssi, flags, data, len);
6190 return;
6191 }
6192
6193 /* The advertising reports cannot be merged, so clear
6194 * the pending report and send out a device found event.
6195 */
6196 clear_pending_adv_report(hdev);
6197 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6198 rssi, flags, data, len, NULL, 0, 0);
6199 return;
6200 }
6201
6202 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6203 * the new event is a SCAN_RSP. We can therefore proceed with
6204 * sending a merged device found event.
6205 */
6206 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6207 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6208 d->last_adv_data, d->last_adv_data_len, data, len, 0);
6209 clear_pending_adv_report(hdev);
6210 }
6211
hci_le_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6212 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6213 struct sk_buff *skb)
6214 {
6215 struct hci_ev_le_advertising_report *ev = data;
6216 u64 instant = jiffies;
6217
6218 if (!ev->num)
6219 return;
6220
6221 hci_dev_lock(hdev);
6222
6223 while (ev->num--) {
6224 struct hci_ev_le_advertising_info *info;
6225 s8 rssi;
6226
6227 info = hci_le_ev_skb_pull(hdev, skb,
6228 HCI_EV_LE_ADVERTISING_REPORT,
6229 sizeof(*info));
6230 if (!info)
6231 break;
6232
6233 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6234 info->length + 1))
6235 break;
6236
6237 if (info->length <= max_adv_len(hdev)) {
6238 rssi = info->data[info->length];
6239 process_adv_report(hdev, info->type, &info->bdaddr,
6240 info->bdaddr_type, NULL, 0,
6241 HCI_ADV_PHY_1M, 0, rssi,
6242 info->data, info->length, false,
6243 false, instant);
6244 } else {
6245 bt_dev_err(hdev, "Dropping invalid advertising data");
6246 }
6247 }
6248
6249 hci_dev_unlock(hdev);
6250 }
6251
ext_evt_type_to_legacy(struct hci_dev * hdev,u16 evt_type)6252 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6253 {
6254 if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6255 switch (evt_type) {
6256 case LE_LEGACY_ADV_IND:
6257 return LE_ADV_IND;
6258 case LE_LEGACY_ADV_DIRECT_IND:
6259 return LE_ADV_DIRECT_IND;
6260 case LE_LEGACY_ADV_SCAN_IND:
6261 return LE_ADV_SCAN_IND;
6262 case LE_LEGACY_NONCONN_IND:
6263 return LE_ADV_NONCONN_IND;
6264 case LE_LEGACY_SCAN_RSP_ADV:
6265 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6266 return LE_ADV_SCAN_RSP;
6267 }
6268
6269 goto invalid;
6270 }
6271
6272 if (evt_type & LE_EXT_ADV_CONN_IND) {
6273 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6274 return LE_ADV_DIRECT_IND;
6275
6276 return LE_ADV_IND;
6277 }
6278
6279 if (evt_type & LE_EXT_ADV_SCAN_RSP)
6280 return LE_ADV_SCAN_RSP;
6281
6282 if (evt_type & LE_EXT_ADV_SCAN_IND)
6283 return LE_ADV_SCAN_IND;
6284
6285 if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6286 evt_type & LE_EXT_ADV_DIRECT_IND)
6287 return LE_ADV_NONCONN_IND;
6288
6289 invalid:
6290 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6291 evt_type);
6292
6293 return LE_ADV_INVALID;
6294 }
6295
hci_le_ext_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6296 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6297 struct sk_buff *skb)
6298 {
6299 struct hci_ev_le_ext_adv_report *ev = data;
6300 u64 instant = jiffies;
6301
6302 if (!ev->num)
6303 return;
6304
6305 hci_dev_lock(hdev);
6306
6307 while (ev->num--) {
6308 struct hci_ev_le_ext_adv_info *info;
6309 u8 legacy_evt_type;
6310 u16 evt_type;
6311
6312 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6313 sizeof(*info));
6314 if (!info)
6315 break;
6316
6317 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6318 info->length))
6319 break;
6320
6321 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6322 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6323
6324 if (test_bit(HCI_QUIRK_FIXUP_LE_EXT_ADV_REPORT_PHY,
6325 &hdev->quirks)) {
6326 info->primary_phy &= 0x1f;
6327 info->secondary_phy &= 0x1f;
6328 }
6329
6330 if (legacy_evt_type != LE_ADV_INVALID) {
6331 process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6332 info->bdaddr_type, NULL, 0,
6333 info->primary_phy,
6334 info->secondary_phy,
6335 info->rssi, info->data, info->length,
6336 !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6337 false, instant);
6338 }
6339 }
6340
6341 hci_dev_unlock(hdev);
6342 }
6343
hci_le_pa_term_sync(struct hci_dev * hdev,__le16 handle)6344 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6345 {
6346 struct hci_cp_le_pa_term_sync cp;
6347
6348 memset(&cp, 0, sizeof(cp));
6349 cp.handle = handle;
6350
6351 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6352 }
6353
hci_le_pa_sync_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6354 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6355 struct sk_buff *skb)
6356 {
6357 struct hci_ev_le_pa_sync_established *ev = data;
6358 int mask = hdev->link_mode;
6359 __u8 flags = 0;
6360 struct hci_conn *pa_sync, *conn;
6361
6362 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6363
6364 hci_dev_lock(hdev);
6365
6366 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6367
6368 conn = hci_conn_hash_lookup_sid(hdev, ev->sid, &ev->bdaddr,
6369 ev->bdaddr_type);
6370 if (!conn) {
6371 bt_dev_err(hdev,
6372 "Unable to find connection for dst %pMR sid 0x%2.2x",
6373 &ev->bdaddr, ev->sid);
6374 goto unlock;
6375 }
6376
6377 clear_bit(HCI_CONN_CREATE_PA_SYNC, &conn->flags);
6378
6379 conn->sync_handle = le16_to_cpu(ev->handle);
6380 conn->sid = HCI_SID_INVALID;
6381
6382 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags);
6383 if (!(mask & HCI_LM_ACCEPT)) {
6384 hci_le_pa_term_sync(hdev, ev->handle);
6385 goto unlock;
6386 }
6387
6388 if (!(flags & HCI_PROTO_DEFER))
6389 goto unlock;
6390
6391 /* Add connection to indicate PA sync event */
6392 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6393 HCI_ROLE_SLAVE);
6394
6395 if (IS_ERR(pa_sync))
6396 goto unlock;
6397
6398 pa_sync->sync_handle = le16_to_cpu(ev->handle);
6399
6400 if (ev->status) {
6401 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6402
6403 /* Notify iso layer */
6404 hci_connect_cfm(pa_sync, ev->status);
6405 }
6406
6407 unlock:
6408 /* Handle any other pending PA sync command */
6409 hci_pa_create_sync_pending(hdev);
6410
6411 hci_dev_unlock(hdev);
6412 }
6413
hci_le_per_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6414 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6415 struct sk_buff *skb)
6416 {
6417 struct hci_ev_le_per_adv_report *ev = data;
6418 int mask = hdev->link_mode;
6419 __u8 flags = 0;
6420 struct hci_conn *pa_sync;
6421
6422 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6423
6424 hci_dev_lock(hdev);
6425
6426 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6427 if (!(mask & HCI_LM_ACCEPT))
6428 goto unlock;
6429
6430 if (!(flags & HCI_PROTO_DEFER))
6431 goto unlock;
6432
6433 pa_sync = hci_conn_hash_lookup_pa_sync_handle
6434 (hdev,
6435 le16_to_cpu(ev->sync_handle));
6436
6437 if (!pa_sync)
6438 goto unlock;
6439
6440 if (ev->data_status == LE_PA_DATA_COMPLETE &&
6441 !test_and_set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags)) {
6442 /* Notify iso layer */
6443 hci_connect_cfm(pa_sync, 0);
6444
6445 /* Notify MGMT layer */
6446 mgmt_device_connected(hdev, pa_sync, NULL, 0);
6447 }
6448
6449 unlock:
6450 hci_dev_unlock(hdev);
6451 }
6452
hci_le_remote_feat_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6453 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6454 struct sk_buff *skb)
6455 {
6456 struct hci_ev_le_remote_feat_complete *ev = data;
6457 struct hci_conn *conn;
6458
6459 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6460
6461 hci_dev_lock(hdev);
6462
6463 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6464 if (conn) {
6465 if (!ev->status)
6466 memcpy(conn->features[0], ev->features, 8);
6467
6468 if (conn->state == BT_CONFIG) {
6469 __u8 status;
6470
6471 /* If the local controller supports peripheral-initiated
6472 * features exchange, but the remote controller does
6473 * not, then it is possible that the error code 0x1a
6474 * for unsupported remote feature gets returned.
6475 *
6476 * In this specific case, allow the connection to
6477 * transition into connected state and mark it as
6478 * successful.
6479 */
6480 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE &&
6481 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6482 status = 0x00;
6483 else
6484 status = ev->status;
6485
6486 conn->state = BT_CONNECTED;
6487 hci_connect_cfm(conn, status);
6488 hci_conn_drop(conn);
6489 }
6490 }
6491
6492 hci_dev_unlock(hdev);
6493 }
6494
hci_le_ltk_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6495 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6496 struct sk_buff *skb)
6497 {
6498 struct hci_ev_le_ltk_req *ev = data;
6499 struct hci_cp_le_ltk_reply cp;
6500 struct hci_cp_le_ltk_neg_reply neg;
6501 struct hci_conn *conn;
6502 struct smp_ltk *ltk;
6503
6504 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6505
6506 hci_dev_lock(hdev);
6507
6508 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6509 if (conn == NULL)
6510 goto not_found;
6511
6512 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6513 if (!ltk)
6514 goto not_found;
6515
6516 if (smp_ltk_is_sc(ltk)) {
6517 /* With SC both EDiv and Rand are set to zero */
6518 if (ev->ediv || ev->rand)
6519 goto not_found;
6520 } else {
6521 /* For non-SC keys check that EDiv and Rand match */
6522 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6523 goto not_found;
6524 }
6525
6526 memcpy(cp.ltk, ltk->val, ltk->enc_size);
6527 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6528 cp.handle = cpu_to_le16(conn->handle);
6529
6530 conn->pending_sec_level = smp_ltk_sec_level(ltk);
6531
6532 conn->enc_key_size = ltk->enc_size;
6533
6534 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6535
6536 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6537 * temporary key used to encrypt a connection following
6538 * pairing. It is used during the Encrypted Session Setup to
6539 * distribute the keys. Later, security can be re-established
6540 * using a distributed LTK.
6541 */
6542 if (ltk->type == SMP_STK) {
6543 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6544 list_del_rcu(<k->list);
6545 kfree_rcu(ltk, rcu);
6546 } else {
6547 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6548 }
6549
6550 hci_dev_unlock(hdev);
6551
6552 return;
6553
6554 not_found:
6555 neg.handle = ev->handle;
6556 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6557 hci_dev_unlock(hdev);
6558 }
6559
send_conn_param_neg_reply(struct hci_dev * hdev,u16 handle,u8 reason)6560 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6561 u8 reason)
6562 {
6563 struct hci_cp_le_conn_param_req_neg_reply cp;
6564
6565 cp.handle = cpu_to_le16(handle);
6566 cp.reason = reason;
6567
6568 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6569 &cp);
6570 }
6571
hci_le_remote_conn_param_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6572 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6573 struct sk_buff *skb)
6574 {
6575 struct hci_ev_le_remote_conn_param_req *ev = data;
6576 struct hci_cp_le_conn_param_req_reply cp;
6577 struct hci_conn *hcon;
6578 u16 handle, min, max, latency, timeout;
6579
6580 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6581
6582 handle = le16_to_cpu(ev->handle);
6583 min = le16_to_cpu(ev->interval_min);
6584 max = le16_to_cpu(ev->interval_max);
6585 latency = le16_to_cpu(ev->latency);
6586 timeout = le16_to_cpu(ev->timeout);
6587
6588 hcon = hci_conn_hash_lookup_handle(hdev, handle);
6589 if (!hcon || hcon->state != BT_CONNECTED)
6590 return send_conn_param_neg_reply(hdev, handle,
6591 HCI_ERROR_UNKNOWN_CONN_ID);
6592
6593 if (max > hcon->le_conn_max_interval)
6594 return send_conn_param_neg_reply(hdev, handle,
6595 HCI_ERROR_INVALID_LL_PARAMS);
6596
6597 if (hci_check_conn_params(min, max, latency, timeout))
6598 return send_conn_param_neg_reply(hdev, handle,
6599 HCI_ERROR_INVALID_LL_PARAMS);
6600
6601 if (hcon->role == HCI_ROLE_MASTER) {
6602 struct hci_conn_params *params;
6603 u8 store_hint;
6604
6605 hci_dev_lock(hdev);
6606
6607 params = hci_conn_params_lookup(hdev, &hcon->dst,
6608 hcon->dst_type);
6609 if (params) {
6610 params->conn_min_interval = min;
6611 params->conn_max_interval = max;
6612 params->conn_latency = latency;
6613 params->supervision_timeout = timeout;
6614 store_hint = 0x01;
6615 } else {
6616 store_hint = 0x00;
6617 }
6618
6619 hci_dev_unlock(hdev);
6620
6621 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6622 store_hint, min, max, latency, timeout);
6623 }
6624
6625 cp.handle = ev->handle;
6626 cp.interval_min = ev->interval_min;
6627 cp.interval_max = ev->interval_max;
6628 cp.latency = ev->latency;
6629 cp.timeout = ev->timeout;
6630 cp.min_ce_len = 0;
6631 cp.max_ce_len = 0;
6632
6633 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6634 }
6635
hci_le_direct_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6636 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6637 struct sk_buff *skb)
6638 {
6639 struct hci_ev_le_direct_adv_report *ev = data;
6640 u64 instant = jiffies;
6641 int i;
6642
6643 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6644 flex_array_size(ev, info, ev->num)))
6645 return;
6646
6647 if (!ev->num)
6648 return;
6649
6650 hci_dev_lock(hdev);
6651
6652 for (i = 0; i < ev->num; i++) {
6653 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6654
6655 process_adv_report(hdev, info->type, &info->bdaddr,
6656 info->bdaddr_type, &info->direct_addr,
6657 info->direct_addr_type, HCI_ADV_PHY_1M, 0,
6658 info->rssi, NULL, 0, false, false, instant);
6659 }
6660
6661 hci_dev_unlock(hdev);
6662 }
6663
hci_le_phy_update_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6664 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6665 struct sk_buff *skb)
6666 {
6667 struct hci_ev_le_phy_update_complete *ev = data;
6668 struct hci_conn *conn;
6669
6670 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6671
6672 if (ev->status)
6673 return;
6674
6675 hci_dev_lock(hdev);
6676
6677 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6678 if (!conn)
6679 goto unlock;
6680
6681 conn->le_tx_phy = ev->tx_phy;
6682 conn->le_rx_phy = ev->rx_phy;
6683
6684 unlock:
6685 hci_dev_unlock(hdev);
6686 }
6687
hci_le_cis_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6688 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6689 struct sk_buff *skb)
6690 {
6691 struct hci_evt_le_cis_established *ev = data;
6692 struct hci_conn *conn;
6693 struct bt_iso_qos *qos;
6694 bool pending = false;
6695 u16 handle = __le16_to_cpu(ev->handle);
6696 u32 c_sdu_interval, p_sdu_interval;
6697
6698 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6699
6700 hci_dev_lock(hdev);
6701
6702 conn = hci_conn_hash_lookup_handle(hdev, handle);
6703 if (!conn) {
6704 bt_dev_err(hdev,
6705 "Unable to find connection with handle 0x%4.4x",
6706 handle);
6707 goto unlock;
6708 }
6709
6710 if (conn->type != ISO_LINK) {
6711 bt_dev_err(hdev,
6712 "Invalid connection link type handle 0x%4.4x",
6713 handle);
6714 goto unlock;
6715 }
6716
6717 qos = &conn->iso_qos;
6718
6719 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6720
6721 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part G
6722 * page 3075:
6723 * Transport_Latency_C_To_P = CIG_Sync_Delay + (FT_C_To_P) ×
6724 * ISO_Interval + SDU_Interval_C_To_P
6725 * ...
6726 * SDU_Interval = (CIG_Sync_Delay + (FT) x ISO_Interval) -
6727 * Transport_Latency
6728 */
6729 c_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6730 (ev->c_ft * le16_to_cpu(ev->interval) * 1250)) -
6731 get_unaligned_le24(ev->c_latency);
6732 p_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6733 (ev->p_ft * le16_to_cpu(ev->interval) * 1250)) -
6734 get_unaligned_le24(ev->p_latency);
6735
6736 switch (conn->role) {
6737 case HCI_ROLE_SLAVE:
6738 qos->ucast.in.interval = c_sdu_interval;
6739 qos->ucast.out.interval = p_sdu_interval;
6740 /* Convert Transport Latency (us) to Latency (msec) */
6741 qos->ucast.in.latency =
6742 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6743 1000);
6744 qos->ucast.out.latency =
6745 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6746 1000);
6747 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6748 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6749 qos->ucast.in.phy = ev->c_phy;
6750 qos->ucast.out.phy = ev->p_phy;
6751 break;
6752 case HCI_ROLE_MASTER:
6753 qos->ucast.in.interval = p_sdu_interval;
6754 qos->ucast.out.interval = c_sdu_interval;
6755 /* Convert Transport Latency (us) to Latency (msec) */
6756 qos->ucast.out.latency =
6757 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6758 1000);
6759 qos->ucast.in.latency =
6760 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6761 1000);
6762 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6763 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6764 qos->ucast.out.phy = ev->c_phy;
6765 qos->ucast.in.phy = ev->p_phy;
6766 break;
6767 }
6768
6769 if (!ev->status) {
6770 conn->state = BT_CONNECTED;
6771 hci_debugfs_create_conn(conn);
6772 hci_conn_add_sysfs(conn);
6773 hci_iso_setup_path(conn);
6774 goto unlock;
6775 }
6776
6777 conn->state = BT_CLOSED;
6778 hci_connect_cfm(conn, ev->status);
6779 hci_conn_del(conn);
6780
6781 unlock:
6782 if (pending)
6783 hci_le_create_cis_pending(hdev);
6784
6785 hci_dev_unlock(hdev);
6786 }
6787
hci_le_reject_cis(struct hci_dev * hdev,__le16 handle)6788 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6789 {
6790 struct hci_cp_le_reject_cis cp;
6791
6792 memset(&cp, 0, sizeof(cp));
6793 cp.handle = handle;
6794 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6795 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6796 }
6797
hci_le_accept_cis(struct hci_dev * hdev,__le16 handle)6798 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6799 {
6800 struct hci_cp_le_accept_cis cp;
6801
6802 memset(&cp, 0, sizeof(cp));
6803 cp.handle = handle;
6804 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6805 }
6806
hci_le_cis_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6807 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6808 struct sk_buff *skb)
6809 {
6810 struct hci_evt_le_cis_req *ev = data;
6811 u16 acl_handle, cis_handle;
6812 struct hci_conn *acl, *cis;
6813 int mask;
6814 __u8 flags = 0;
6815
6816 acl_handle = __le16_to_cpu(ev->acl_handle);
6817 cis_handle = __le16_to_cpu(ev->cis_handle);
6818
6819 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
6820 acl_handle, cis_handle, ev->cig_id, ev->cis_id);
6821
6822 hci_dev_lock(hdev);
6823
6824 acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
6825 if (!acl)
6826 goto unlock;
6827
6828 mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
6829 if (!(mask & HCI_LM_ACCEPT)) {
6830 hci_le_reject_cis(hdev, ev->cis_handle);
6831 goto unlock;
6832 }
6833
6834 cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
6835 if (!cis) {
6836 cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
6837 cis_handle);
6838 if (IS_ERR(cis)) {
6839 hci_le_reject_cis(hdev, ev->cis_handle);
6840 goto unlock;
6841 }
6842 }
6843
6844 cis->iso_qos.ucast.cig = ev->cig_id;
6845 cis->iso_qos.ucast.cis = ev->cis_id;
6846
6847 if (!(flags & HCI_PROTO_DEFER)) {
6848 hci_le_accept_cis(hdev, ev->cis_handle);
6849 } else {
6850 cis->state = BT_CONNECT2;
6851 hci_connect_cfm(cis, 0);
6852 }
6853
6854 unlock:
6855 hci_dev_unlock(hdev);
6856 }
6857
hci_iso_term_big_sync(struct hci_dev * hdev,void * data)6858 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
6859 {
6860 u8 handle = PTR_UINT(data);
6861
6862 return hci_le_terminate_big_sync(hdev, handle,
6863 HCI_ERROR_LOCAL_HOST_TERM);
6864 }
6865
hci_le_create_big_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6866 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
6867 struct sk_buff *skb)
6868 {
6869 struct hci_evt_le_create_big_complete *ev = data;
6870 struct hci_conn *conn;
6871 __u8 i = 0;
6872
6873 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
6874
6875 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
6876 flex_array_size(ev, bis_handle, ev->num_bis)))
6877 return;
6878
6879 hci_dev_lock(hdev);
6880
6881 /* Connect all BISes that are bound to the BIG */
6882 while ((conn = hci_conn_hash_lookup_big_state(hdev, ev->handle,
6883 BT_BOUND))) {
6884 if (ev->status) {
6885 hci_connect_cfm(conn, ev->status);
6886 hci_conn_del(conn);
6887 continue;
6888 }
6889
6890 if (hci_conn_set_handle(conn,
6891 __le16_to_cpu(ev->bis_handle[i++])))
6892 continue;
6893
6894 conn->state = BT_CONNECTED;
6895 set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
6896 hci_debugfs_create_conn(conn);
6897 hci_conn_add_sysfs(conn);
6898 hci_iso_setup_path(conn);
6899 }
6900
6901 if (!ev->status && !i)
6902 /* If no BISes have been connected for the BIG,
6903 * terminate. This is in case all bound connections
6904 * have been closed before the BIG creation
6905 * has completed.
6906 */
6907 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
6908 UINT_PTR(ev->handle), NULL);
6909
6910 hci_dev_unlock(hdev);
6911 }
6912
hci_le_big_sync_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6913 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
6914 struct sk_buff *skb)
6915 {
6916 struct hci_evt_le_big_sync_estabilished *ev = data;
6917 struct hci_conn *bis, *conn;
6918 int i;
6919
6920 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6921
6922 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
6923 flex_array_size(ev, bis, ev->num_bis)))
6924 return;
6925
6926 hci_dev_lock(hdev);
6927
6928 conn = hci_conn_hash_lookup_big_sync_pend(hdev, ev->handle,
6929 ev->num_bis);
6930 if (!conn) {
6931 bt_dev_err(hdev,
6932 "Unable to find connection for big 0x%2.2x",
6933 ev->handle);
6934 goto unlock;
6935 }
6936
6937 clear_bit(HCI_CONN_CREATE_BIG_SYNC, &conn->flags);
6938
6939 conn->num_bis = 0;
6940 memset(conn->bis, 0, sizeof(conn->num_bis));
6941
6942 for (i = 0; i < ev->num_bis; i++) {
6943 u16 handle = le16_to_cpu(ev->bis[i]);
6944 __le32 interval;
6945
6946 bis = hci_conn_hash_lookup_handle(hdev, handle);
6947 if (!bis) {
6948 if (handle > HCI_CONN_HANDLE_MAX) {
6949 bt_dev_dbg(hdev, "ignore too large handle %u", handle);
6950 continue;
6951 }
6952 bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
6953 HCI_ROLE_SLAVE, handle);
6954 if (IS_ERR(bis))
6955 continue;
6956 }
6957
6958 if (ev->status != 0x42)
6959 /* Mark PA sync as established */
6960 set_bit(HCI_CONN_PA_SYNC, &bis->flags);
6961
6962 bis->sync_handle = conn->sync_handle;
6963 bis->iso_qos.bcast.big = ev->handle;
6964 memset(&interval, 0, sizeof(interval));
6965 memcpy(&interval, ev->latency, sizeof(ev->latency));
6966 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
6967 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
6968 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
6969 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
6970
6971 if (!ev->status) {
6972 set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
6973 hci_iso_setup_path(bis);
6974 }
6975 }
6976
6977 /* In case BIG sync failed, notify each failed connection to
6978 * the user after all hci connections have been added
6979 */
6980 if (ev->status)
6981 for (i = 0; i < ev->num_bis; i++) {
6982 u16 handle = le16_to_cpu(ev->bis[i]);
6983
6984 bis = hci_conn_hash_lookup_handle(hdev, handle);
6985 if (!bis)
6986 continue;
6987
6988 set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
6989 hci_connect_cfm(bis, ev->status);
6990 }
6991
6992 unlock:
6993 /* Handle any other pending BIG sync command */
6994 hci_le_big_create_sync_pending(hdev);
6995
6996 hci_dev_unlock(hdev);
6997 }
6998
hci_le_big_info_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6999 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
7000 struct sk_buff *skb)
7001 {
7002 struct hci_evt_le_big_info_adv_report *ev = data;
7003 int mask = hdev->link_mode;
7004 __u8 flags = 0;
7005 struct hci_conn *pa_sync;
7006
7007 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
7008
7009 hci_dev_lock(hdev);
7010
7011 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
7012 if (!(mask & HCI_LM_ACCEPT))
7013 goto unlock;
7014
7015 if (!(flags & HCI_PROTO_DEFER))
7016 goto unlock;
7017
7018 pa_sync = hci_conn_hash_lookup_pa_sync_handle
7019 (hdev,
7020 le16_to_cpu(ev->sync_handle));
7021
7022 if (!pa_sync)
7023 goto unlock;
7024
7025 pa_sync->iso_qos.bcast.encryption = ev->encryption;
7026
7027 /* Notify iso layer */
7028 hci_connect_cfm(pa_sync, 0);
7029
7030 unlock:
7031 hci_dev_unlock(hdev);
7032 }
7033
7034 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
7035 [_op] = { \
7036 .func = _func, \
7037 .min_len = _min_len, \
7038 .max_len = _max_len, \
7039 }
7040
7041 #define HCI_LE_EV(_op, _func, _len) \
7042 HCI_LE_EV_VL(_op, _func, _len, _len)
7043
7044 #define HCI_LE_EV_STATUS(_op, _func) \
7045 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
7046
7047 /* Entries in this table shall have their position according to the subevent
7048 * opcode they handle so the use of the macros above is recommend since it does
7049 * attempt to initialize at its proper index using Designated Initializers that
7050 * way events without a callback function can be ommited.
7051 */
7052 static const struct hci_le_ev {
7053 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
7054 u16 min_len;
7055 u16 max_len;
7056 } hci_le_ev_table[U8_MAX + 1] = {
7057 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
7058 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
7059 sizeof(struct hci_ev_le_conn_complete)),
7060 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
7061 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
7062 sizeof(struct hci_ev_le_advertising_report),
7063 HCI_MAX_EVENT_SIZE),
7064 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7065 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7066 hci_le_conn_update_complete_evt,
7067 sizeof(struct hci_ev_le_conn_update_complete)),
7068 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7069 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7070 hci_le_remote_feat_complete_evt,
7071 sizeof(struct hci_ev_le_remote_feat_complete)),
7072 /* [0x05 = HCI_EV_LE_LTK_REQ] */
7073 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7074 sizeof(struct hci_ev_le_ltk_req)),
7075 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7076 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7077 hci_le_remote_conn_param_req_evt,
7078 sizeof(struct hci_ev_le_remote_conn_param_req)),
7079 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7080 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7081 hci_le_enh_conn_complete_evt,
7082 sizeof(struct hci_ev_le_enh_conn_complete)),
7083 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7084 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7085 sizeof(struct hci_ev_le_direct_adv_report),
7086 HCI_MAX_EVENT_SIZE),
7087 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7088 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7089 sizeof(struct hci_ev_le_phy_update_complete)),
7090 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7091 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7092 sizeof(struct hci_ev_le_ext_adv_report),
7093 HCI_MAX_EVENT_SIZE),
7094 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7095 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7096 hci_le_pa_sync_estabilished_evt,
7097 sizeof(struct hci_ev_le_pa_sync_established)),
7098 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7099 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7100 hci_le_per_adv_report_evt,
7101 sizeof(struct hci_ev_le_per_adv_report),
7102 HCI_MAX_EVENT_SIZE),
7103 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7104 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7105 sizeof(struct hci_evt_le_ext_adv_set_term)),
7106 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7107 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7108 sizeof(struct hci_evt_le_cis_established)),
7109 /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7110 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7111 sizeof(struct hci_evt_le_cis_req)),
7112 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7113 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7114 hci_le_create_big_complete_evt,
7115 sizeof(struct hci_evt_le_create_big_complete),
7116 HCI_MAX_EVENT_SIZE),
7117 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABILISHED] */
7118 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7119 hci_le_big_sync_established_evt,
7120 sizeof(struct hci_evt_le_big_sync_estabilished),
7121 HCI_MAX_EVENT_SIZE),
7122 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7123 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7124 hci_le_big_info_adv_report_evt,
7125 sizeof(struct hci_evt_le_big_info_adv_report),
7126 HCI_MAX_EVENT_SIZE),
7127 };
7128
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)7129 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7130 struct sk_buff *skb, u16 *opcode, u8 *status,
7131 hci_req_complete_t *req_complete,
7132 hci_req_complete_skb_t *req_complete_skb)
7133 {
7134 struct hci_ev_le_meta *ev = data;
7135 const struct hci_le_ev *subev;
7136
7137 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7138
7139 /* Only match event if command OGF is for LE */
7140 if (hdev->req_skb &&
7141 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 &&
7142 hci_skb_event(hdev->req_skb) == ev->subevent) {
7143 *opcode = hci_skb_opcode(hdev->req_skb);
7144 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7145 req_complete_skb);
7146 }
7147
7148 subev = &hci_le_ev_table[ev->subevent];
7149 if (!subev->func)
7150 return;
7151
7152 if (skb->len < subev->min_len) {
7153 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7154 ev->subevent, skb->len, subev->min_len);
7155 return;
7156 }
7157
7158 /* Just warn if the length is over max_len size it still be
7159 * possible to partially parse the event so leave to callback to
7160 * decide if that is acceptable.
7161 */
7162 if (skb->len > subev->max_len)
7163 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7164 ev->subevent, skb->len, subev->max_len);
7165 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7166 if (!data)
7167 return;
7168
7169 subev->func(hdev, data, skb);
7170 }
7171
hci_get_cmd_complete(struct hci_dev * hdev,u16 opcode,u8 event,struct sk_buff * skb)7172 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7173 u8 event, struct sk_buff *skb)
7174 {
7175 struct hci_ev_cmd_complete *ev;
7176 struct hci_event_hdr *hdr;
7177
7178 if (!skb)
7179 return false;
7180
7181 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7182 if (!hdr)
7183 return false;
7184
7185 if (event) {
7186 if (hdr->evt != event)
7187 return false;
7188 return true;
7189 }
7190
7191 /* Check if request ended in Command Status - no way to retrieve
7192 * any extra parameters in this case.
7193 */
7194 if (hdr->evt == HCI_EV_CMD_STATUS)
7195 return false;
7196
7197 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7198 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7199 hdr->evt);
7200 return false;
7201 }
7202
7203 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7204 if (!ev)
7205 return false;
7206
7207 if (opcode != __le16_to_cpu(ev->opcode)) {
7208 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7209 __le16_to_cpu(ev->opcode));
7210 return false;
7211 }
7212
7213 return true;
7214 }
7215
hci_store_wake_reason(struct hci_dev * hdev,u8 event,struct sk_buff * skb)7216 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7217 struct sk_buff *skb)
7218 {
7219 struct hci_ev_le_advertising_info *adv;
7220 struct hci_ev_le_direct_adv_info *direct_adv;
7221 struct hci_ev_le_ext_adv_info *ext_adv;
7222 const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7223 const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7224
7225 hci_dev_lock(hdev);
7226
7227 /* If we are currently suspended and this is the first BT event seen,
7228 * save the wake reason associated with the event.
7229 */
7230 if (!hdev->suspended || hdev->wake_reason)
7231 goto unlock;
7232
7233 /* Default to remote wake. Values for wake_reason are documented in the
7234 * Bluez mgmt api docs.
7235 */
7236 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7237
7238 /* Once configured for remote wakeup, we should only wake up for
7239 * reconnections. It's useful to see which device is waking us up so
7240 * keep track of the bdaddr of the connection event that woke us up.
7241 */
7242 if (event == HCI_EV_CONN_REQUEST) {
7243 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7244 hdev->wake_addr_type = BDADDR_BREDR;
7245 } else if (event == HCI_EV_CONN_COMPLETE) {
7246 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7247 hdev->wake_addr_type = BDADDR_BREDR;
7248 } else if (event == HCI_EV_LE_META) {
7249 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7250 u8 subevent = le_ev->subevent;
7251 u8 *ptr = &skb->data[sizeof(*le_ev)];
7252 u8 num_reports = *ptr;
7253
7254 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7255 subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7256 subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7257 num_reports) {
7258 adv = (void *)(ptr + 1);
7259 direct_adv = (void *)(ptr + 1);
7260 ext_adv = (void *)(ptr + 1);
7261
7262 switch (subevent) {
7263 case HCI_EV_LE_ADVERTISING_REPORT:
7264 bacpy(&hdev->wake_addr, &adv->bdaddr);
7265 hdev->wake_addr_type = adv->bdaddr_type;
7266 break;
7267 case HCI_EV_LE_DIRECT_ADV_REPORT:
7268 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7269 hdev->wake_addr_type = direct_adv->bdaddr_type;
7270 break;
7271 case HCI_EV_LE_EXT_ADV_REPORT:
7272 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7273 hdev->wake_addr_type = ext_adv->bdaddr_type;
7274 break;
7275 }
7276 }
7277 } else {
7278 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7279 }
7280
7281 unlock:
7282 hci_dev_unlock(hdev);
7283 }
7284
7285 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7286 [_op] = { \
7287 .req = false, \
7288 .func = _func, \
7289 .min_len = _min_len, \
7290 .max_len = _max_len, \
7291 }
7292
7293 #define HCI_EV(_op, _func, _len) \
7294 HCI_EV_VL(_op, _func, _len, _len)
7295
7296 #define HCI_EV_STATUS(_op, _func) \
7297 HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7298
7299 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7300 [_op] = { \
7301 .req = true, \
7302 .func_req = _func, \
7303 .min_len = _min_len, \
7304 .max_len = _max_len, \
7305 }
7306
7307 #define HCI_EV_REQ(_op, _func, _len) \
7308 HCI_EV_REQ_VL(_op, _func, _len, _len)
7309
7310 /* Entries in this table shall have their position according to the event opcode
7311 * they handle so the use of the macros above is recommend since it does attempt
7312 * to initialize at its proper index using Designated Initializers that way
7313 * events without a callback function don't have entered.
7314 */
7315 static const struct hci_ev {
7316 bool req;
7317 union {
7318 void (*func)(struct hci_dev *hdev, void *data,
7319 struct sk_buff *skb);
7320 void (*func_req)(struct hci_dev *hdev, void *data,
7321 struct sk_buff *skb, u16 *opcode, u8 *status,
7322 hci_req_complete_t *req_complete,
7323 hci_req_complete_skb_t *req_complete_skb);
7324 };
7325 u16 min_len;
7326 u16 max_len;
7327 } hci_ev_table[U8_MAX + 1] = {
7328 /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7329 HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7330 /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7331 HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7332 sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7333 /* [0x03 = HCI_EV_CONN_COMPLETE] */
7334 HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7335 sizeof(struct hci_ev_conn_complete)),
7336 /* [0x04 = HCI_EV_CONN_REQUEST] */
7337 HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7338 sizeof(struct hci_ev_conn_request)),
7339 /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7340 HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7341 sizeof(struct hci_ev_disconn_complete)),
7342 /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7343 HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7344 sizeof(struct hci_ev_auth_complete)),
7345 /* [0x07 = HCI_EV_REMOTE_NAME] */
7346 HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7347 sizeof(struct hci_ev_remote_name)),
7348 /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7349 HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7350 sizeof(struct hci_ev_encrypt_change)),
7351 /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7352 HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7353 hci_change_link_key_complete_evt,
7354 sizeof(struct hci_ev_change_link_key_complete)),
7355 /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7356 HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7357 sizeof(struct hci_ev_remote_features)),
7358 /* [0x0e = HCI_EV_CMD_COMPLETE] */
7359 HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7360 sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7361 /* [0x0f = HCI_EV_CMD_STATUS] */
7362 HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7363 sizeof(struct hci_ev_cmd_status)),
7364 /* [0x10 = HCI_EV_CMD_STATUS] */
7365 HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7366 sizeof(struct hci_ev_hardware_error)),
7367 /* [0x12 = HCI_EV_ROLE_CHANGE] */
7368 HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7369 sizeof(struct hci_ev_role_change)),
7370 /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7371 HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7372 sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7373 /* [0x14 = HCI_EV_MODE_CHANGE] */
7374 HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7375 sizeof(struct hci_ev_mode_change)),
7376 /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7377 HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7378 sizeof(struct hci_ev_pin_code_req)),
7379 /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7380 HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7381 sizeof(struct hci_ev_link_key_req)),
7382 /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7383 HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7384 sizeof(struct hci_ev_link_key_notify)),
7385 /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7386 HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7387 sizeof(struct hci_ev_clock_offset)),
7388 /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7389 HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7390 sizeof(struct hci_ev_pkt_type_change)),
7391 /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7392 HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7393 sizeof(struct hci_ev_pscan_rep_mode)),
7394 /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7395 HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7396 hci_inquiry_result_with_rssi_evt,
7397 sizeof(struct hci_ev_inquiry_result_rssi),
7398 HCI_MAX_EVENT_SIZE),
7399 /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7400 HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7401 sizeof(struct hci_ev_remote_ext_features)),
7402 /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7403 HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7404 sizeof(struct hci_ev_sync_conn_complete)),
7405 /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7406 HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7407 hci_extended_inquiry_result_evt,
7408 sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7409 /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7410 HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7411 sizeof(struct hci_ev_key_refresh_complete)),
7412 /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7413 HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7414 sizeof(struct hci_ev_io_capa_request)),
7415 /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7416 HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7417 sizeof(struct hci_ev_io_capa_reply)),
7418 /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7419 HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7420 sizeof(struct hci_ev_user_confirm_req)),
7421 /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7422 HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7423 sizeof(struct hci_ev_user_passkey_req)),
7424 /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7425 HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7426 sizeof(struct hci_ev_remote_oob_data_request)),
7427 /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7428 HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7429 sizeof(struct hci_ev_simple_pair_complete)),
7430 /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7431 HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7432 sizeof(struct hci_ev_user_passkey_notify)),
7433 /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7434 HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7435 sizeof(struct hci_ev_keypress_notify)),
7436 /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7437 HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7438 sizeof(struct hci_ev_remote_host_features)),
7439 /* [0x3e = HCI_EV_LE_META] */
7440 HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7441 sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7442 /* [0xff = HCI_EV_VENDOR] */
7443 HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7444 };
7445
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)7446 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7447 u16 *opcode, u8 *status,
7448 hci_req_complete_t *req_complete,
7449 hci_req_complete_skb_t *req_complete_skb)
7450 {
7451 const struct hci_ev *ev = &hci_ev_table[event];
7452 void *data;
7453
7454 if (!ev->func)
7455 return;
7456
7457 if (skb->len < ev->min_len) {
7458 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7459 event, skb->len, ev->min_len);
7460 return;
7461 }
7462
7463 /* Just warn if the length is over max_len size it still be
7464 * possible to partially parse the event so leave to callback to
7465 * decide if that is acceptable.
7466 */
7467 if (skb->len > ev->max_len)
7468 bt_dev_warn_ratelimited(hdev,
7469 "unexpected event 0x%2.2x length: %u > %u",
7470 event, skb->len, ev->max_len);
7471
7472 data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7473 if (!data)
7474 return;
7475
7476 if (ev->req)
7477 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7478 req_complete_skb);
7479 else
7480 ev->func(hdev, data, skb);
7481 }
7482
hci_event_packet(struct hci_dev * hdev,struct sk_buff * skb)7483 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7484 {
7485 struct hci_event_hdr *hdr = (void *) skb->data;
7486 hci_req_complete_t req_complete = NULL;
7487 hci_req_complete_skb_t req_complete_skb = NULL;
7488 struct sk_buff *orig_skb = NULL;
7489 u8 status = 0, event, req_evt = 0;
7490 u16 opcode = HCI_OP_NOP;
7491
7492 if (skb->len < sizeof(*hdr)) {
7493 bt_dev_err(hdev, "Malformed HCI Event");
7494 goto done;
7495 }
7496
7497 kfree_skb(hdev->recv_event);
7498 hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7499
7500 event = hdr->evt;
7501 if (!event) {
7502 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7503 event);
7504 goto done;
7505 }
7506
7507 /* Only match event if command OGF is not for LE */
7508 if (hdev->req_skb &&
7509 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) != 0x08 &&
7510 hci_skb_event(hdev->req_skb) == event) {
7511 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->req_skb),
7512 status, &req_complete, &req_complete_skb);
7513 req_evt = event;
7514 }
7515
7516 /* If it looks like we might end up having to call
7517 * req_complete_skb, store a pristine copy of the skb since the
7518 * various handlers may modify the original one through
7519 * skb_pull() calls, etc.
7520 */
7521 if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7522 event == HCI_EV_CMD_COMPLETE)
7523 orig_skb = skb_clone(skb, GFP_KERNEL);
7524
7525 skb_pull(skb, HCI_EVENT_HDR_SIZE);
7526
7527 /* Store wake reason if we're suspended */
7528 hci_store_wake_reason(hdev, event, skb);
7529
7530 bt_dev_dbg(hdev, "event 0x%2.2x", event);
7531
7532 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7533 &req_complete_skb);
7534
7535 if (req_complete) {
7536 req_complete(hdev, status, opcode);
7537 } else if (req_complete_skb) {
7538 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7539 kfree_skb(orig_skb);
7540 orig_skb = NULL;
7541 }
7542 req_complete_skb(hdev, status, opcode, orig_skb);
7543 }
7544
7545 done:
7546 kfree_skb(orig_skb);
7547 kfree_skb(skb);
7548 hdev->stat.evt_rx++;
7549 }
7550