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_rp_remote_name_req_cancel *rp = data;
155
156 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
157
158 return rp->status;
159 }
160
hci_cc_role_discovery(struct hci_dev * hdev,void * data,struct sk_buff * skb)161 static u8 hci_cc_role_discovery(struct hci_dev *hdev, void *data,
162 struct sk_buff *skb)
163 {
164 struct hci_rp_role_discovery *rp = data;
165 struct hci_conn *conn;
166
167 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
168
169 if (rp->status)
170 return rp->status;
171
172 hci_dev_lock(hdev);
173
174 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
175 if (conn)
176 conn->role = rp->role;
177
178 hci_dev_unlock(hdev);
179
180 return rp->status;
181 }
182
hci_cc_read_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)183 static u8 hci_cc_read_link_policy(struct hci_dev *hdev, void *data,
184 struct sk_buff *skb)
185 {
186 struct hci_rp_read_link_policy *rp = data;
187 struct hci_conn *conn;
188
189 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
190
191 if (rp->status)
192 return rp->status;
193
194 hci_dev_lock(hdev);
195
196 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
197 if (conn)
198 conn->link_policy = __le16_to_cpu(rp->policy);
199
200 hci_dev_unlock(hdev);
201
202 return rp->status;
203 }
204
hci_cc_write_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)205 static u8 hci_cc_write_link_policy(struct hci_dev *hdev, void *data,
206 struct sk_buff *skb)
207 {
208 struct hci_rp_write_link_policy *rp = data;
209 struct hci_conn *conn;
210 void *sent;
211
212 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
213
214 if (rp->status)
215 return rp->status;
216
217 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY);
218 if (!sent)
219 return rp->status;
220
221 hci_dev_lock(hdev);
222
223 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
224 if (conn)
225 conn->link_policy = get_unaligned_le16(sent + 2);
226
227 hci_dev_unlock(hdev);
228
229 return rp->status;
230 }
231
hci_cc_read_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)232 static u8 hci_cc_read_def_link_policy(struct hci_dev *hdev, void *data,
233 struct sk_buff *skb)
234 {
235 struct hci_rp_read_def_link_policy *rp = data;
236
237 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
238
239 if (rp->status)
240 return rp->status;
241
242 hdev->link_policy = __le16_to_cpu(rp->policy);
243
244 return rp->status;
245 }
246
hci_cc_write_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)247 static u8 hci_cc_write_def_link_policy(struct hci_dev *hdev, void *data,
248 struct sk_buff *skb)
249 {
250 struct hci_ev_status *rp = data;
251 void *sent;
252
253 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
254
255 if (rp->status)
256 return rp->status;
257
258 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY);
259 if (!sent)
260 return rp->status;
261
262 hdev->link_policy = get_unaligned_le16(sent);
263
264 return rp->status;
265 }
266
hci_cc_reset(struct hci_dev * hdev,void * data,struct sk_buff * skb)267 static u8 hci_cc_reset(struct hci_dev *hdev, void *data, struct sk_buff *skb)
268 {
269 struct hci_ev_status *rp = data;
270
271 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
272
273 clear_bit(HCI_RESET, &hdev->flags);
274
275 if (rp->status)
276 return rp->status;
277
278 /* Reset all non-persistent flags */
279 hci_dev_clear_volatile_flags(hdev);
280
281 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
282
283 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
284 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
285
286 memset(hdev->adv_data, 0, sizeof(hdev->adv_data));
287 hdev->adv_data_len = 0;
288
289 memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data));
290 hdev->scan_rsp_data_len = 0;
291
292 hdev->le_scan_type = LE_SCAN_PASSIVE;
293
294 hdev->ssp_debug_mode = 0;
295
296 hci_bdaddr_list_clear(&hdev->le_accept_list);
297 hci_bdaddr_list_clear(&hdev->le_resolv_list);
298
299 return rp->status;
300 }
301
hci_cc_read_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)302 static u8 hci_cc_read_stored_link_key(struct hci_dev *hdev, void *data,
303 struct sk_buff *skb)
304 {
305 struct hci_rp_read_stored_link_key *rp = data;
306 struct hci_cp_read_stored_link_key *sent;
307
308 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
309
310 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY);
311 if (!sent)
312 return rp->status;
313
314 if (!rp->status && sent->read_all == 0x01) {
315 hdev->stored_max_keys = le16_to_cpu(rp->max_keys);
316 hdev->stored_num_keys = le16_to_cpu(rp->num_keys);
317 }
318
319 return rp->status;
320 }
321
hci_cc_delete_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)322 static u8 hci_cc_delete_stored_link_key(struct hci_dev *hdev, void *data,
323 struct sk_buff *skb)
324 {
325 struct hci_rp_delete_stored_link_key *rp = data;
326 u16 num_keys;
327
328 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
329
330 if (rp->status)
331 return rp->status;
332
333 num_keys = le16_to_cpu(rp->num_keys);
334
335 if (num_keys <= hdev->stored_num_keys)
336 hdev->stored_num_keys -= num_keys;
337 else
338 hdev->stored_num_keys = 0;
339
340 return rp->status;
341 }
342
hci_cc_write_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)343 static u8 hci_cc_write_local_name(struct hci_dev *hdev, void *data,
344 struct sk_buff *skb)
345 {
346 struct hci_ev_status *rp = data;
347 void *sent;
348
349 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
350
351 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME);
352 if (!sent)
353 return rp->status;
354
355 hci_dev_lock(hdev);
356
357 if (hci_dev_test_flag(hdev, HCI_MGMT))
358 mgmt_set_local_name_complete(hdev, sent, rp->status);
359 else if (!rp->status)
360 memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH);
361
362 hci_dev_unlock(hdev);
363
364 return rp->status;
365 }
366
hci_cc_read_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)367 static u8 hci_cc_read_local_name(struct hci_dev *hdev, void *data,
368 struct sk_buff *skb)
369 {
370 struct hci_rp_read_local_name *rp = data;
371
372 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
373
374 if (rp->status)
375 return rp->status;
376
377 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
378 hci_dev_test_flag(hdev, HCI_CONFIG))
379 memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH);
380
381 return rp->status;
382 }
383
hci_cc_write_auth_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)384 static u8 hci_cc_write_auth_enable(struct hci_dev *hdev, void *data,
385 struct sk_buff *skb)
386 {
387 struct hci_ev_status *rp = data;
388 void *sent;
389
390 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
391
392 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE);
393 if (!sent)
394 return rp->status;
395
396 hci_dev_lock(hdev);
397
398 if (!rp->status) {
399 __u8 param = *((__u8 *) sent);
400
401 if (param == AUTH_ENABLED)
402 set_bit(HCI_AUTH, &hdev->flags);
403 else
404 clear_bit(HCI_AUTH, &hdev->flags);
405 }
406
407 if (hci_dev_test_flag(hdev, HCI_MGMT))
408 mgmt_auth_enable_complete(hdev, rp->status);
409
410 hci_dev_unlock(hdev);
411
412 return rp->status;
413 }
414
hci_cc_write_encrypt_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)415 static u8 hci_cc_write_encrypt_mode(struct hci_dev *hdev, void *data,
416 struct sk_buff *skb)
417 {
418 struct hci_ev_status *rp = data;
419 __u8 param;
420 void *sent;
421
422 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
423
424 if (rp->status)
425 return rp->status;
426
427 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE);
428 if (!sent)
429 return rp->status;
430
431 param = *((__u8 *) sent);
432
433 if (param)
434 set_bit(HCI_ENCRYPT, &hdev->flags);
435 else
436 clear_bit(HCI_ENCRYPT, &hdev->flags);
437
438 return rp->status;
439 }
440
hci_cc_write_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)441 static u8 hci_cc_write_scan_enable(struct hci_dev *hdev, void *data,
442 struct sk_buff *skb)
443 {
444 struct hci_ev_status *rp = data;
445 __u8 param;
446 void *sent;
447
448 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
449
450 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE);
451 if (!sent)
452 return rp->status;
453
454 param = *((__u8 *) sent);
455
456 hci_dev_lock(hdev);
457
458 if (rp->status) {
459 hdev->discov_timeout = 0;
460 goto done;
461 }
462
463 if (param & SCAN_INQUIRY)
464 set_bit(HCI_ISCAN, &hdev->flags);
465 else
466 clear_bit(HCI_ISCAN, &hdev->flags);
467
468 if (param & SCAN_PAGE)
469 set_bit(HCI_PSCAN, &hdev->flags);
470 else
471 clear_bit(HCI_PSCAN, &hdev->flags);
472
473 done:
474 hci_dev_unlock(hdev);
475
476 return rp->status;
477 }
478
hci_cc_set_event_filter(struct hci_dev * hdev,void * data,struct sk_buff * skb)479 static u8 hci_cc_set_event_filter(struct hci_dev *hdev, void *data,
480 struct sk_buff *skb)
481 {
482 struct hci_ev_status *rp = data;
483 struct hci_cp_set_event_filter *cp;
484 void *sent;
485
486 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
487
488 if (rp->status)
489 return rp->status;
490
491 sent = hci_sent_cmd_data(hdev, HCI_OP_SET_EVENT_FLT);
492 if (!sent)
493 return rp->status;
494
495 cp = (struct hci_cp_set_event_filter *)sent;
496
497 if (cp->flt_type == HCI_FLT_CLEAR_ALL)
498 hci_dev_clear_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
499 else
500 hci_dev_set_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
501
502 return rp->status;
503 }
504
hci_cc_read_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)505 static u8 hci_cc_read_class_of_dev(struct hci_dev *hdev, void *data,
506 struct sk_buff *skb)
507 {
508 struct hci_rp_read_class_of_dev *rp = data;
509
510 if (WARN_ON(!hdev))
511 return HCI_ERROR_UNSPECIFIED;
512
513 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
514
515 if (rp->status)
516 return rp->status;
517
518 memcpy(hdev->dev_class, rp->dev_class, 3);
519
520 bt_dev_dbg(hdev, "class 0x%.2x%.2x%.2x", hdev->dev_class[2],
521 hdev->dev_class[1], hdev->dev_class[0]);
522
523 return rp->status;
524 }
525
hci_cc_write_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)526 static u8 hci_cc_write_class_of_dev(struct hci_dev *hdev, void *data,
527 struct sk_buff *skb)
528 {
529 struct hci_ev_status *rp = data;
530 void *sent;
531
532 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
533
534 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV);
535 if (!sent)
536 return rp->status;
537
538 hci_dev_lock(hdev);
539
540 if (!rp->status)
541 memcpy(hdev->dev_class, sent, 3);
542
543 if (hci_dev_test_flag(hdev, HCI_MGMT))
544 mgmt_set_class_of_dev_complete(hdev, sent, rp->status);
545
546 hci_dev_unlock(hdev);
547
548 return rp->status;
549 }
550
hci_cc_read_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)551 static u8 hci_cc_read_voice_setting(struct hci_dev *hdev, void *data,
552 struct sk_buff *skb)
553 {
554 struct hci_rp_read_voice_setting *rp = data;
555 __u16 setting;
556
557 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
558
559 if (rp->status)
560 return rp->status;
561
562 setting = __le16_to_cpu(rp->voice_setting);
563
564 if (hdev->voice_setting == setting)
565 return rp->status;
566
567 hdev->voice_setting = setting;
568
569 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
570
571 if (hdev->notify)
572 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
573
574 return rp->status;
575 }
576
hci_cc_write_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)577 static u8 hci_cc_write_voice_setting(struct hci_dev *hdev, void *data,
578 struct sk_buff *skb)
579 {
580 struct hci_ev_status *rp = data;
581 __u16 setting;
582 void *sent;
583
584 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
585
586 if (rp->status)
587 return rp->status;
588
589 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING);
590 if (!sent)
591 return rp->status;
592
593 setting = get_unaligned_le16(sent);
594
595 if (hdev->voice_setting == setting)
596 return rp->status;
597
598 hdev->voice_setting = setting;
599
600 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
601
602 if (hdev->notify)
603 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
604
605 return rp->status;
606 }
607
hci_cc_read_num_supported_iac(struct hci_dev * hdev,void * data,struct sk_buff * skb)608 static u8 hci_cc_read_num_supported_iac(struct hci_dev *hdev, void *data,
609 struct sk_buff *skb)
610 {
611 struct hci_rp_read_num_supported_iac *rp = data;
612
613 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
614
615 if (rp->status)
616 return rp->status;
617
618 hdev->num_iac = rp->num_iac;
619
620 bt_dev_dbg(hdev, "num iac %d", hdev->num_iac);
621
622 return rp->status;
623 }
624
hci_cc_write_ssp_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)625 static u8 hci_cc_write_ssp_mode(struct hci_dev *hdev, void *data,
626 struct sk_buff *skb)
627 {
628 struct hci_ev_status *rp = data;
629 struct hci_cp_write_ssp_mode *sent;
630
631 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
632
633 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE);
634 if (!sent)
635 return rp->status;
636
637 hci_dev_lock(hdev);
638
639 if (!rp->status) {
640 if (sent->mode)
641 hdev->features[1][0] |= LMP_HOST_SSP;
642 else
643 hdev->features[1][0] &= ~LMP_HOST_SSP;
644 }
645
646 if (!rp->status) {
647 if (sent->mode)
648 hci_dev_set_flag(hdev, HCI_SSP_ENABLED);
649 else
650 hci_dev_clear_flag(hdev, HCI_SSP_ENABLED);
651 }
652
653 hci_dev_unlock(hdev);
654
655 return rp->status;
656 }
657
hci_cc_write_sc_support(struct hci_dev * hdev,void * data,struct sk_buff * skb)658 static u8 hci_cc_write_sc_support(struct hci_dev *hdev, void *data,
659 struct sk_buff *skb)
660 {
661 struct hci_ev_status *rp = data;
662 struct hci_cp_write_sc_support *sent;
663
664 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
665
666 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT);
667 if (!sent)
668 return rp->status;
669
670 hci_dev_lock(hdev);
671
672 if (!rp->status) {
673 if (sent->support)
674 hdev->features[1][0] |= LMP_HOST_SC;
675 else
676 hdev->features[1][0] &= ~LMP_HOST_SC;
677 }
678
679 if (!hci_dev_test_flag(hdev, HCI_MGMT) && !rp->status) {
680 if (sent->support)
681 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
682 else
683 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
684 }
685
686 hci_dev_unlock(hdev);
687
688 return rp->status;
689 }
690
hci_cc_read_local_version(struct hci_dev * hdev,void * data,struct sk_buff * skb)691 static u8 hci_cc_read_local_version(struct hci_dev *hdev, void *data,
692 struct sk_buff *skb)
693 {
694 struct hci_rp_read_local_version *rp = data;
695
696 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
697
698 if (rp->status)
699 return rp->status;
700
701 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
702 hci_dev_test_flag(hdev, HCI_CONFIG)) {
703 hdev->hci_ver = rp->hci_ver;
704 hdev->hci_rev = __le16_to_cpu(rp->hci_rev);
705 hdev->lmp_ver = rp->lmp_ver;
706 hdev->manufacturer = __le16_to_cpu(rp->manufacturer);
707 hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver);
708 }
709
710 return rp->status;
711 }
712
hci_cc_read_enc_key_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)713 static u8 hci_cc_read_enc_key_size(struct hci_dev *hdev, void *data,
714 struct sk_buff *skb)
715 {
716 struct hci_rp_read_enc_key_size *rp = data;
717 struct hci_conn *conn;
718 u16 handle;
719 u8 status = rp->status;
720
721 bt_dev_dbg(hdev, "status 0x%2.2x", status);
722
723 handle = le16_to_cpu(rp->handle);
724
725 hci_dev_lock(hdev);
726
727 conn = hci_conn_hash_lookup_handle(hdev, handle);
728 if (!conn) {
729 status = 0xFF;
730 goto done;
731 }
732
733 /* While unexpected, the read_enc_key_size command may fail. The most
734 * secure approach is to then assume the key size is 0 to force a
735 * disconnection.
736 */
737 if (status) {
738 bt_dev_err(hdev, "failed to read key size for handle %u",
739 handle);
740 conn->enc_key_size = 0;
741 } else {
742 u8 *key_enc_size = hci_conn_key_enc_size(conn);
743
744 conn->enc_key_size = rp->key_size;
745 status = 0;
746
747 /* Attempt to check if the key size is too small or if it has
748 * been downgraded from the last time it was stored as part of
749 * the link_key.
750 */
751 if (conn->enc_key_size < hdev->min_enc_key_size ||
752 (key_enc_size && conn->enc_key_size < *key_enc_size)) {
753 /* As slave role, the conn->state has been set to
754 * BT_CONNECTED and l2cap conn req might not be received
755 * yet, at this moment the l2cap layer almost does
756 * nothing with the non-zero status.
757 * So we also clear encrypt related bits, and then the
758 * handler of l2cap conn req will get the right secure
759 * state at a later time.
760 */
761 status = HCI_ERROR_AUTH_FAILURE;
762 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
763 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
764 }
765
766 /* Update the key encryption size with the connection one */
767 if (key_enc_size && *key_enc_size != conn->enc_key_size)
768 *key_enc_size = conn->enc_key_size;
769 }
770
771 hci_encrypt_cfm(conn, status);
772
773 done:
774 hci_dev_unlock(hdev);
775
776 return status;
777 }
778
hci_cc_read_local_commands(struct hci_dev * hdev,void * data,struct sk_buff * skb)779 static u8 hci_cc_read_local_commands(struct hci_dev *hdev, void *data,
780 struct sk_buff *skb)
781 {
782 struct hci_rp_read_local_commands *rp = data;
783
784 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
785
786 if (rp->status)
787 return rp->status;
788
789 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
790 hci_dev_test_flag(hdev, HCI_CONFIG))
791 memcpy(hdev->commands, rp->commands, sizeof(hdev->commands));
792
793 return rp->status;
794 }
795
hci_cc_read_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)796 static u8 hci_cc_read_auth_payload_timeout(struct hci_dev *hdev, void *data,
797 struct sk_buff *skb)
798 {
799 struct hci_rp_read_auth_payload_to *rp = data;
800 struct hci_conn *conn;
801
802 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
803
804 if (rp->status)
805 return rp->status;
806
807 hci_dev_lock(hdev);
808
809 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
810 if (conn)
811 conn->auth_payload_timeout = __le16_to_cpu(rp->timeout);
812
813 hci_dev_unlock(hdev);
814
815 return rp->status;
816 }
817
hci_cc_write_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)818 static u8 hci_cc_write_auth_payload_timeout(struct hci_dev *hdev, void *data,
819 struct sk_buff *skb)
820 {
821 struct hci_rp_write_auth_payload_to *rp = data;
822 struct hci_conn *conn;
823 void *sent;
824
825 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
826
827 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO);
828 if (!sent)
829 return rp->status;
830
831 hci_dev_lock(hdev);
832
833 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
834 if (!conn) {
835 rp->status = 0xff;
836 goto unlock;
837 }
838
839 if (!rp->status)
840 conn->auth_payload_timeout = get_unaligned_le16(sent + 2);
841
842 unlock:
843 hci_dev_unlock(hdev);
844
845 return rp->status;
846 }
847
hci_cc_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)848 static u8 hci_cc_read_local_features(struct hci_dev *hdev, void *data,
849 struct sk_buff *skb)
850 {
851 struct hci_rp_read_local_features *rp = data;
852
853 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
854
855 if (rp->status)
856 return rp->status;
857
858 memcpy(hdev->features, rp->features, 8);
859
860 /* Adjust default settings according to features
861 * supported by device. */
862
863 if (hdev->features[0][0] & LMP_3SLOT)
864 hdev->pkt_type |= (HCI_DM3 | HCI_DH3);
865
866 if (hdev->features[0][0] & LMP_5SLOT)
867 hdev->pkt_type |= (HCI_DM5 | HCI_DH5);
868
869 if (hdev->features[0][1] & LMP_HV2) {
870 hdev->pkt_type |= (HCI_HV2);
871 hdev->esco_type |= (ESCO_HV2);
872 }
873
874 if (hdev->features[0][1] & LMP_HV3) {
875 hdev->pkt_type |= (HCI_HV3);
876 hdev->esco_type |= (ESCO_HV3);
877 }
878
879 if (lmp_esco_capable(hdev))
880 hdev->esco_type |= (ESCO_EV3);
881
882 if (hdev->features[0][4] & LMP_EV4)
883 hdev->esco_type |= (ESCO_EV4);
884
885 if (hdev->features[0][4] & LMP_EV5)
886 hdev->esco_type |= (ESCO_EV5);
887
888 if (hdev->features[0][5] & LMP_EDR_ESCO_2M)
889 hdev->esco_type |= (ESCO_2EV3);
890
891 if (hdev->features[0][5] & LMP_EDR_ESCO_3M)
892 hdev->esco_type |= (ESCO_3EV3);
893
894 if (hdev->features[0][5] & LMP_EDR_3S_ESCO)
895 hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5);
896
897 return rp->status;
898 }
899
hci_cc_read_local_ext_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)900 static u8 hci_cc_read_local_ext_features(struct hci_dev *hdev, void *data,
901 struct sk_buff *skb)
902 {
903 struct hci_rp_read_local_ext_features *rp = data;
904
905 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
906
907 if (rp->status)
908 return rp->status;
909
910 if (hdev->max_page < rp->max_page) {
911 if (test_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2,
912 &hdev->quirks))
913 bt_dev_warn(hdev, "broken local ext features page 2");
914 else
915 hdev->max_page = rp->max_page;
916 }
917
918 if (rp->page < HCI_MAX_PAGES)
919 memcpy(hdev->features[rp->page], rp->features, 8);
920
921 return rp->status;
922 }
923
hci_cc_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)924 static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data,
925 struct sk_buff *skb)
926 {
927 struct hci_rp_read_buffer_size *rp = data;
928
929 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
930
931 if (rp->status)
932 return rp->status;
933
934 hdev->acl_mtu = __le16_to_cpu(rp->acl_mtu);
935 hdev->sco_mtu = rp->sco_mtu;
936 hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt);
937 hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt);
938
939 if (test_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks)) {
940 hdev->sco_mtu = 64;
941 hdev->sco_pkts = 8;
942 }
943
944 if (!read_voice_setting_capable(hdev))
945 hdev->sco_pkts = 0;
946
947 hdev->acl_cnt = hdev->acl_pkts;
948 hdev->sco_cnt = hdev->sco_pkts;
949
950 BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu,
951 hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts);
952
953 if (!hdev->acl_mtu || !hdev->acl_pkts)
954 return HCI_ERROR_INVALID_PARAMETERS;
955
956 return rp->status;
957 }
958
hci_cc_read_bd_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)959 static u8 hci_cc_read_bd_addr(struct hci_dev *hdev, void *data,
960 struct sk_buff *skb)
961 {
962 struct hci_rp_read_bd_addr *rp = data;
963
964 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
965
966 if (rp->status)
967 return rp->status;
968
969 if (test_bit(HCI_INIT, &hdev->flags))
970 bacpy(&hdev->bdaddr, &rp->bdaddr);
971
972 if (hci_dev_test_flag(hdev, HCI_SETUP))
973 bacpy(&hdev->setup_addr, &rp->bdaddr);
974
975 return rp->status;
976 }
977
hci_cc_read_local_pairing_opts(struct hci_dev * hdev,void * data,struct sk_buff * skb)978 static u8 hci_cc_read_local_pairing_opts(struct hci_dev *hdev, void *data,
979 struct sk_buff *skb)
980 {
981 struct hci_rp_read_local_pairing_opts *rp = data;
982
983 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
984
985 if (rp->status)
986 return rp->status;
987
988 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
989 hci_dev_test_flag(hdev, HCI_CONFIG)) {
990 hdev->pairing_opts = rp->pairing_opts;
991 hdev->max_enc_key_size = rp->max_key_size;
992 }
993
994 return rp->status;
995 }
996
hci_cc_read_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)997 static u8 hci_cc_read_page_scan_activity(struct hci_dev *hdev, void *data,
998 struct sk_buff *skb)
999 {
1000 struct hci_rp_read_page_scan_activity *rp = data;
1001
1002 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1003
1004 if (rp->status)
1005 return rp->status;
1006
1007 if (test_bit(HCI_INIT, &hdev->flags)) {
1008 hdev->page_scan_interval = __le16_to_cpu(rp->interval);
1009 hdev->page_scan_window = __le16_to_cpu(rp->window);
1010 }
1011
1012 return rp->status;
1013 }
1014
hci_cc_write_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)1015 static u8 hci_cc_write_page_scan_activity(struct hci_dev *hdev, void *data,
1016 struct sk_buff *skb)
1017 {
1018 struct hci_ev_status *rp = data;
1019 struct hci_cp_write_page_scan_activity *sent;
1020
1021 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1022
1023 if (rp->status)
1024 return rp->status;
1025
1026 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY);
1027 if (!sent)
1028 return rp->status;
1029
1030 hdev->page_scan_interval = __le16_to_cpu(sent->interval);
1031 hdev->page_scan_window = __le16_to_cpu(sent->window);
1032
1033 return rp->status;
1034 }
1035
hci_cc_read_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1036 static u8 hci_cc_read_page_scan_type(struct hci_dev *hdev, void *data,
1037 struct sk_buff *skb)
1038 {
1039 struct hci_rp_read_page_scan_type *rp = data;
1040
1041 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1042
1043 if (rp->status)
1044 return rp->status;
1045
1046 if (test_bit(HCI_INIT, &hdev->flags))
1047 hdev->page_scan_type = rp->type;
1048
1049 return rp->status;
1050 }
1051
hci_cc_write_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1052 static u8 hci_cc_write_page_scan_type(struct hci_dev *hdev, void *data,
1053 struct sk_buff *skb)
1054 {
1055 struct hci_ev_status *rp = data;
1056 u8 *type;
1057
1058 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1059
1060 if (rp->status)
1061 return rp->status;
1062
1063 type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE);
1064 if (type)
1065 hdev->page_scan_type = *type;
1066
1067 return rp->status;
1068 }
1069
hci_cc_read_clock(struct hci_dev * hdev,void * data,struct sk_buff * skb)1070 static u8 hci_cc_read_clock(struct hci_dev *hdev, void *data,
1071 struct sk_buff *skb)
1072 {
1073 struct hci_rp_read_clock *rp = data;
1074 struct hci_cp_read_clock *cp;
1075 struct hci_conn *conn;
1076
1077 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1078
1079 if (rp->status)
1080 return rp->status;
1081
1082 hci_dev_lock(hdev);
1083
1084 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
1085 if (!cp)
1086 goto unlock;
1087
1088 if (cp->which == 0x00) {
1089 hdev->clock = le32_to_cpu(rp->clock);
1090 goto unlock;
1091 }
1092
1093 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
1094 if (conn) {
1095 conn->clock = le32_to_cpu(rp->clock);
1096 conn->clock_accuracy = le16_to_cpu(rp->accuracy);
1097 }
1098
1099 unlock:
1100 hci_dev_unlock(hdev);
1101 return rp->status;
1102 }
1103
hci_cc_read_inq_rsp_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1104 static u8 hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev, void *data,
1105 struct sk_buff *skb)
1106 {
1107 struct hci_rp_read_inq_rsp_tx_power *rp = data;
1108
1109 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1110
1111 if (rp->status)
1112 return rp->status;
1113
1114 hdev->inq_tx_power = rp->tx_power;
1115
1116 return rp->status;
1117 }
1118
hci_cc_read_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1119 static u8 hci_cc_read_def_err_data_reporting(struct hci_dev *hdev, void *data,
1120 struct sk_buff *skb)
1121 {
1122 struct hci_rp_read_def_err_data_reporting *rp = data;
1123
1124 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1125
1126 if (rp->status)
1127 return rp->status;
1128
1129 hdev->err_data_reporting = rp->err_data_reporting;
1130
1131 return rp->status;
1132 }
1133
hci_cc_write_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1134 static u8 hci_cc_write_def_err_data_reporting(struct hci_dev *hdev, void *data,
1135 struct sk_buff *skb)
1136 {
1137 struct hci_ev_status *rp = data;
1138 struct hci_cp_write_def_err_data_reporting *cp;
1139
1140 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1141
1142 if (rp->status)
1143 return rp->status;
1144
1145 cp = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING);
1146 if (!cp)
1147 return rp->status;
1148
1149 hdev->err_data_reporting = cp->err_data_reporting;
1150
1151 return rp->status;
1152 }
1153
hci_cc_pin_code_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1154 static u8 hci_cc_pin_code_reply(struct hci_dev *hdev, void *data,
1155 struct sk_buff *skb)
1156 {
1157 struct hci_rp_pin_code_reply *rp = data;
1158 struct hci_cp_pin_code_reply *cp;
1159 struct hci_conn *conn;
1160
1161 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1162
1163 hci_dev_lock(hdev);
1164
1165 if (hci_dev_test_flag(hdev, HCI_MGMT))
1166 mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status);
1167
1168 if (rp->status)
1169 goto unlock;
1170
1171 cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY);
1172 if (!cp)
1173 goto unlock;
1174
1175 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
1176 if (conn)
1177 conn->pin_length = cp->pin_len;
1178
1179 unlock:
1180 hci_dev_unlock(hdev);
1181 return rp->status;
1182 }
1183
hci_cc_pin_code_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1184 static u8 hci_cc_pin_code_neg_reply(struct hci_dev *hdev, void *data,
1185 struct sk_buff *skb)
1186 {
1187 struct hci_rp_pin_code_neg_reply *rp = data;
1188
1189 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1190
1191 hci_dev_lock(hdev);
1192
1193 if (hci_dev_test_flag(hdev, HCI_MGMT))
1194 mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr,
1195 rp->status);
1196
1197 hci_dev_unlock(hdev);
1198
1199 return rp->status;
1200 }
1201
hci_cc_le_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1202 static u8 hci_cc_le_read_buffer_size(struct hci_dev *hdev, void *data,
1203 struct sk_buff *skb)
1204 {
1205 struct hci_rp_le_read_buffer_size *rp = data;
1206
1207 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1208
1209 if (rp->status)
1210 return rp->status;
1211
1212 hdev->le_mtu = __le16_to_cpu(rp->le_mtu);
1213 hdev->le_pkts = rp->le_max_pkt;
1214
1215 hdev->le_cnt = hdev->le_pkts;
1216
1217 BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts);
1218
1219 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
1220 return HCI_ERROR_INVALID_PARAMETERS;
1221
1222 return rp->status;
1223 }
1224
hci_cc_le_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)1225 static u8 hci_cc_le_read_local_features(struct hci_dev *hdev, void *data,
1226 struct sk_buff *skb)
1227 {
1228 struct hci_rp_le_read_local_features *rp = data;
1229
1230 BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1231
1232 if (rp->status)
1233 return rp->status;
1234
1235 memcpy(hdev->le_features, rp->features, 8);
1236
1237 return rp->status;
1238 }
1239
hci_cc_le_read_adv_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1240 static u8 hci_cc_le_read_adv_tx_power(struct hci_dev *hdev, void *data,
1241 struct sk_buff *skb)
1242 {
1243 struct hci_rp_le_read_adv_tx_power *rp = data;
1244
1245 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1246
1247 if (rp->status)
1248 return rp->status;
1249
1250 hdev->adv_tx_power = rp->tx_power;
1251
1252 return rp->status;
1253 }
1254
hci_cc_user_confirm_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1255 static u8 hci_cc_user_confirm_reply(struct hci_dev *hdev, void *data,
1256 struct sk_buff *skb)
1257 {
1258 struct hci_rp_user_confirm_reply *rp = data;
1259
1260 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1261
1262 hci_dev_lock(hdev);
1263
1264 if (hci_dev_test_flag(hdev, HCI_MGMT))
1265 mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0,
1266 rp->status);
1267
1268 hci_dev_unlock(hdev);
1269
1270 return rp->status;
1271 }
1272
hci_cc_user_confirm_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1273 static u8 hci_cc_user_confirm_neg_reply(struct hci_dev *hdev, void *data,
1274 struct sk_buff *skb)
1275 {
1276 struct hci_rp_user_confirm_reply *rp = data;
1277
1278 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1279
1280 hci_dev_lock(hdev);
1281
1282 if (hci_dev_test_flag(hdev, HCI_MGMT))
1283 mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr,
1284 ACL_LINK, 0, rp->status);
1285
1286 hci_dev_unlock(hdev);
1287
1288 return rp->status;
1289 }
1290
hci_cc_user_passkey_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1291 static u8 hci_cc_user_passkey_reply(struct hci_dev *hdev, void *data,
1292 struct sk_buff *skb)
1293 {
1294 struct hci_rp_user_confirm_reply *rp = data;
1295
1296 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1297
1298 hci_dev_lock(hdev);
1299
1300 if (hci_dev_test_flag(hdev, HCI_MGMT))
1301 mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK,
1302 0, rp->status);
1303
1304 hci_dev_unlock(hdev);
1305
1306 return rp->status;
1307 }
1308
hci_cc_user_passkey_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1309 static u8 hci_cc_user_passkey_neg_reply(struct hci_dev *hdev, void *data,
1310 struct sk_buff *skb)
1311 {
1312 struct hci_rp_user_confirm_reply *rp = data;
1313
1314 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1315
1316 hci_dev_lock(hdev);
1317
1318 if (hci_dev_test_flag(hdev, HCI_MGMT))
1319 mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr,
1320 ACL_LINK, 0, rp->status);
1321
1322 hci_dev_unlock(hdev);
1323
1324 return rp->status;
1325 }
1326
hci_cc_read_local_oob_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1327 static u8 hci_cc_read_local_oob_data(struct hci_dev *hdev, void *data,
1328 struct sk_buff *skb)
1329 {
1330 struct hci_rp_read_local_oob_data *rp = data;
1331
1332 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1333
1334 return rp->status;
1335 }
1336
hci_cc_read_local_oob_ext_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1337 static u8 hci_cc_read_local_oob_ext_data(struct hci_dev *hdev, void *data,
1338 struct sk_buff *skb)
1339 {
1340 struct hci_rp_read_local_oob_ext_data *rp = data;
1341
1342 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1343
1344 return rp->status;
1345 }
1346
hci_cc_le_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1347 static u8 hci_cc_le_set_random_addr(struct hci_dev *hdev, void *data,
1348 struct sk_buff *skb)
1349 {
1350 struct hci_ev_status *rp = data;
1351 bdaddr_t *sent;
1352
1353 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1354
1355 if (rp->status)
1356 return rp->status;
1357
1358 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR);
1359 if (!sent)
1360 return rp->status;
1361
1362 hci_dev_lock(hdev);
1363
1364 bacpy(&hdev->random_addr, sent);
1365
1366 if (!bacmp(&hdev->rpa, sent)) {
1367 hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED);
1368 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired,
1369 secs_to_jiffies(hdev->rpa_timeout));
1370 }
1371
1372 hci_dev_unlock(hdev);
1373
1374 return rp->status;
1375 }
1376
hci_cc_le_set_default_phy(struct hci_dev * hdev,void * data,struct sk_buff * skb)1377 static u8 hci_cc_le_set_default_phy(struct hci_dev *hdev, void *data,
1378 struct sk_buff *skb)
1379 {
1380 struct hci_ev_status *rp = data;
1381 struct hci_cp_le_set_default_phy *cp;
1382
1383 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1384
1385 if (rp->status)
1386 return rp->status;
1387
1388 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY);
1389 if (!cp)
1390 return rp->status;
1391
1392 hci_dev_lock(hdev);
1393
1394 hdev->le_tx_def_phys = cp->tx_phys;
1395 hdev->le_rx_def_phys = cp->rx_phys;
1396
1397 hci_dev_unlock(hdev);
1398
1399 return rp->status;
1400 }
1401
hci_cc_le_set_adv_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1402 static u8 hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, void *data,
1403 struct sk_buff *skb)
1404 {
1405 struct hci_ev_status *rp = data;
1406 struct hci_cp_le_set_adv_set_rand_addr *cp;
1407 struct adv_info *adv;
1408
1409 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1410
1411 if (rp->status)
1412 return rp->status;
1413
1414 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR);
1415 /* Update only in case the adv instance since handle 0x00 shall be using
1416 * HCI_OP_LE_SET_RANDOM_ADDR since that allows both extended and
1417 * non-extended adverting.
1418 */
1419 if (!cp || !cp->handle)
1420 return rp->status;
1421
1422 hci_dev_lock(hdev);
1423
1424 adv = hci_find_adv_instance(hdev, cp->handle);
1425 if (adv) {
1426 bacpy(&adv->random_addr, &cp->bdaddr);
1427 if (!bacmp(&hdev->rpa, &cp->bdaddr)) {
1428 adv->rpa_expired = false;
1429 queue_delayed_work(hdev->workqueue,
1430 &adv->rpa_expired_cb,
1431 secs_to_jiffies(hdev->rpa_timeout));
1432 }
1433 }
1434
1435 hci_dev_unlock(hdev);
1436
1437 return rp->status;
1438 }
1439
hci_cc_le_remove_adv_set(struct hci_dev * hdev,void * data,struct sk_buff * skb)1440 static u8 hci_cc_le_remove_adv_set(struct hci_dev *hdev, void *data,
1441 struct sk_buff *skb)
1442 {
1443 struct hci_ev_status *rp = data;
1444 u8 *instance;
1445 int err;
1446
1447 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1448
1449 if (rp->status)
1450 return rp->status;
1451
1452 instance = hci_sent_cmd_data(hdev, HCI_OP_LE_REMOVE_ADV_SET);
1453 if (!instance)
1454 return rp->status;
1455
1456 hci_dev_lock(hdev);
1457
1458 err = hci_remove_adv_instance(hdev, *instance);
1459 if (!err)
1460 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), hdev,
1461 *instance);
1462
1463 hci_dev_unlock(hdev);
1464
1465 return rp->status;
1466 }
1467
hci_cc_le_clear_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1468 static u8 hci_cc_le_clear_adv_sets(struct hci_dev *hdev, void *data,
1469 struct sk_buff *skb)
1470 {
1471 struct hci_ev_status *rp = data;
1472 struct adv_info *adv, *n;
1473 int err;
1474
1475 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1476
1477 if (rp->status)
1478 return rp->status;
1479
1480 if (!hci_sent_cmd_data(hdev, HCI_OP_LE_CLEAR_ADV_SETS))
1481 return rp->status;
1482
1483 hci_dev_lock(hdev);
1484
1485 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1486 u8 instance = adv->instance;
1487
1488 err = hci_remove_adv_instance(hdev, instance);
1489 if (!err)
1490 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd),
1491 hdev, instance);
1492 }
1493
1494 hci_dev_unlock(hdev);
1495
1496 return rp->status;
1497 }
1498
hci_cc_le_read_transmit_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1499 static u8 hci_cc_le_read_transmit_power(struct hci_dev *hdev, void *data,
1500 struct sk_buff *skb)
1501 {
1502 struct hci_rp_le_read_transmit_power *rp = data;
1503
1504 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1505
1506 if (rp->status)
1507 return rp->status;
1508
1509 hdev->min_le_tx_power = rp->min_le_tx_power;
1510 hdev->max_le_tx_power = rp->max_le_tx_power;
1511
1512 return rp->status;
1513 }
1514
hci_cc_le_set_privacy_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)1515 static u8 hci_cc_le_set_privacy_mode(struct hci_dev *hdev, void *data,
1516 struct sk_buff *skb)
1517 {
1518 struct hci_ev_status *rp = data;
1519 struct hci_cp_le_set_privacy_mode *cp;
1520 struct hci_conn_params *params;
1521
1522 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1523
1524 if (rp->status)
1525 return rp->status;
1526
1527 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PRIVACY_MODE);
1528 if (!cp)
1529 return rp->status;
1530
1531 hci_dev_lock(hdev);
1532
1533 params = hci_conn_params_lookup(hdev, &cp->bdaddr, cp->bdaddr_type);
1534 if (params)
1535 WRITE_ONCE(params->privacy_mode, cp->mode);
1536
1537 hci_dev_unlock(hdev);
1538
1539 return rp->status;
1540 }
1541
hci_cc_le_set_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1542 static u8 hci_cc_le_set_adv_enable(struct hci_dev *hdev, void *data,
1543 struct sk_buff *skb)
1544 {
1545 struct hci_ev_status *rp = data;
1546 __u8 *sent;
1547
1548 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1549
1550 if (rp->status)
1551 return rp->status;
1552
1553 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE);
1554 if (!sent)
1555 return rp->status;
1556
1557 hci_dev_lock(hdev);
1558
1559 /* If we're doing connection initiation as peripheral. Set a
1560 * timeout in case something goes wrong.
1561 */
1562 if (*sent) {
1563 struct hci_conn *conn;
1564
1565 hci_dev_set_flag(hdev, HCI_LE_ADV);
1566
1567 conn = hci_lookup_le_connect(hdev);
1568 if (conn)
1569 queue_delayed_work(hdev->workqueue,
1570 &conn->le_conn_timeout,
1571 conn->conn_timeout);
1572 } else {
1573 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1574 }
1575
1576 hci_dev_unlock(hdev);
1577
1578 return rp->status;
1579 }
1580
hci_cc_le_set_ext_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1581 static u8 hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev, void *data,
1582 struct sk_buff *skb)
1583 {
1584 struct hci_cp_le_set_ext_adv_enable *cp;
1585 struct hci_cp_ext_adv_set *set;
1586 struct adv_info *adv = NULL, *n;
1587 struct hci_ev_status *rp = data;
1588
1589 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1590
1591 if (rp->status)
1592 return rp->status;
1593
1594 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE);
1595 if (!cp)
1596 return rp->status;
1597
1598 set = (void *)cp->data;
1599
1600 hci_dev_lock(hdev);
1601
1602 if (cp->num_of_sets)
1603 adv = hci_find_adv_instance(hdev, set->handle);
1604
1605 if (cp->enable) {
1606 struct hci_conn *conn;
1607
1608 hci_dev_set_flag(hdev, HCI_LE_ADV);
1609
1610 if (adv && !adv->periodic)
1611 adv->enabled = true;
1612
1613 conn = hci_lookup_le_connect(hdev);
1614 if (conn)
1615 queue_delayed_work(hdev->workqueue,
1616 &conn->le_conn_timeout,
1617 conn->conn_timeout);
1618 } else {
1619 if (cp->num_of_sets) {
1620 if (adv)
1621 adv->enabled = false;
1622
1623 /* If just one instance was disabled check if there are
1624 * any other instance enabled before clearing HCI_LE_ADV
1625 */
1626 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1627 list) {
1628 if (adv->enabled)
1629 goto unlock;
1630 }
1631 } else {
1632 /* All instances shall be considered disabled */
1633 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1634 list)
1635 adv->enabled = false;
1636 }
1637
1638 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1639 }
1640
1641 unlock:
1642 hci_dev_unlock(hdev);
1643 return rp->status;
1644 }
1645
hci_cc_le_set_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1646 static u8 hci_cc_le_set_scan_param(struct hci_dev *hdev, void *data,
1647 struct sk_buff *skb)
1648 {
1649 struct hci_cp_le_set_scan_param *cp;
1650 struct hci_ev_status *rp = data;
1651
1652 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1653
1654 if (rp->status)
1655 return rp->status;
1656
1657 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM);
1658 if (!cp)
1659 return rp->status;
1660
1661 hci_dev_lock(hdev);
1662
1663 hdev->le_scan_type = cp->type;
1664
1665 hci_dev_unlock(hdev);
1666
1667 return rp->status;
1668 }
1669
hci_cc_le_set_ext_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1670 static u8 hci_cc_le_set_ext_scan_param(struct hci_dev *hdev, void *data,
1671 struct sk_buff *skb)
1672 {
1673 struct hci_cp_le_set_ext_scan_params *cp;
1674 struct hci_ev_status *rp = data;
1675 struct hci_cp_le_scan_phy_params *phy_param;
1676
1677 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1678
1679 if (rp->status)
1680 return rp->status;
1681
1682 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS);
1683 if (!cp)
1684 return rp->status;
1685
1686 phy_param = (void *)cp->data;
1687
1688 hci_dev_lock(hdev);
1689
1690 hdev->le_scan_type = phy_param->type;
1691
1692 hci_dev_unlock(hdev);
1693
1694 return rp->status;
1695 }
1696
has_pending_adv_report(struct hci_dev * hdev)1697 static bool has_pending_adv_report(struct hci_dev *hdev)
1698 {
1699 struct discovery_state *d = &hdev->discovery;
1700
1701 return bacmp(&d->last_adv_addr, BDADDR_ANY);
1702 }
1703
clear_pending_adv_report(struct hci_dev * hdev)1704 static void clear_pending_adv_report(struct hci_dev *hdev)
1705 {
1706 struct discovery_state *d = &hdev->discovery;
1707
1708 bacpy(&d->last_adv_addr, BDADDR_ANY);
1709 d->last_adv_data_len = 0;
1710 }
1711
store_pending_adv_report(struct hci_dev * hdev,bdaddr_t * bdaddr,u8 bdaddr_type,s8 rssi,u32 flags,u8 * data,u8 len)1712 static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr,
1713 u8 bdaddr_type, s8 rssi, u32 flags,
1714 u8 *data, u8 len)
1715 {
1716 struct discovery_state *d = &hdev->discovery;
1717
1718 if (len > max_adv_len(hdev))
1719 return;
1720
1721 bacpy(&d->last_adv_addr, bdaddr);
1722 d->last_adv_addr_type = bdaddr_type;
1723 d->last_adv_rssi = rssi;
1724 d->last_adv_flags = flags;
1725 memcpy(d->last_adv_data, data, len);
1726 d->last_adv_data_len = len;
1727 }
1728
le_set_scan_enable_complete(struct hci_dev * hdev,u8 enable)1729 static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable)
1730 {
1731 hci_dev_lock(hdev);
1732
1733 switch (enable) {
1734 case LE_SCAN_ENABLE:
1735 hci_dev_set_flag(hdev, HCI_LE_SCAN);
1736 if (hdev->le_scan_type == LE_SCAN_ACTIVE) {
1737 clear_pending_adv_report(hdev);
1738 hci_discovery_set_state(hdev, DISCOVERY_FINDING);
1739 }
1740 break;
1741
1742 case LE_SCAN_DISABLE:
1743 /* We do this here instead of when setting DISCOVERY_STOPPED
1744 * since the latter would potentially require waiting for
1745 * inquiry to stop too.
1746 */
1747 if (has_pending_adv_report(hdev)) {
1748 struct discovery_state *d = &hdev->discovery;
1749
1750 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
1751 d->last_adv_addr_type, NULL,
1752 d->last_adv_rssi, d->last_adv_flags,
1753 d->last_adv_data,
1754 d->last_adv_data_len, NULL, 0, 0);
1755 }
1756
1757 /* Cancel this timer so that we don't try to disable scanning
1758 * when it's already disabled.
1759 */
1760 cancel_delayed_work(&hdev->le_scan_disable);
1761
1762 hci_dev_clear_flag(hdev, HCI_LE_SCAN);
1763
1764 /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we
1765 * interrupted scanning due to a connect request. Mark
1766 * therefore discovery as stopped.
1767 */
1768 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED))
1769 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1770 else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) &&
1771 hdev->discovery.state == DISCOVERY_FINDING)
1772 queue_work(hdev->workqueue, &hdev->reenable_adv_work);
1773
1774 break;
1775
1776 default:
1777 bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d",
1778 enable);
1779 break;
1780 }
1781
1782 hci_dev_unlock(hdev);
1783 }
1784
hci_cc_le_set_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1785 static u8 hci_cc_le_set_scan_enable(struct hci_dev *hdev, void *data,
1786 struct sk_buff *skb)
1787 {
1788 struct hci_cp_le_set_scan_enable *cp;
1789 struct hci_ev_status *rp = data;
1790
1791 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1792
1793 if (rp->status)
1794 return rp->status;
1795
1796 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
1797 if (!cp)
1798 return rp->status;
1799
1800 le_set_scan_enable_complete(hdev, cp->enable);
1801
1802 return rp->status;
1803 }
1804
hci_cc_le_set_ext_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1805 static u8 hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev, void *data,
1806 struct sk_buff *skb)
1807 {
1808 struct hci_cp_le_set_ext_scan_enable *cp;
1809 struct hci_ev_status *rp = data;
1810
1811 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1812
1813 if (rp->status)
1814 return rp->status;
1815
1816 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE);
1817 if (!cp)
1818 return rp->status;
1819
1820 le_set_scan_enable_complete(hdev, cp->enable);
1821
1822 return rp->status;
1823 }
1824
hci_cc_le_read_num_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1825 static u8 hci_cc_le_read_num_adv_sets(struct hci_dev *hdev, void *data,
1826 struct sk_buff *skb)
1827 {
1828 struct hci_rp_le_read_num_supported_adv_sets *rp = data;
1829
1830 bt_dev_dbg(hdev, "status 0x%2.2x No of Adv sets %u", rp->status,
1831 rp->num_of_sets);
1832
1833 if (rp->status)
1834 return rp->status;
1835
1836 hdev->le_num_of_adv_sets = rp->num_of_sets;
1837
1838 return rp->status;
1839 }
1840
hci_cc_le_read_accept_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1841 static u8 hci_cc_le_read_accept_list_size(struct hci_dev *hdev, void *data,
1842 struct sk_buff *skb)
1843 {
1844 struct hci_rp_le_read_accept_list_size *rp = data;
1845
1846 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
1847
1848 if (rp->status)
1849 return rp->status;
1850
1851 hdev->le_accept_list_size = rp->size;
1852
1853 return rp->status;
1854 }
1855
hci_cc_le_clear_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1856 static u8 hci_cc_le_clear_accept_list(struct hci_dev *hdev, void *data,
1857 struct sk_buff *skb)
1858 {
1859 struct hci_ev_status *rp = data;
1860
1861 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1862
1863 if (rp->status)
1864 return rp->status;
1865
1866 hci_dev_lock(hdev);
1867 hci_bdaddr_list_clear(&hdev->le_accept_list);
1868 hci_dev_unlock(hdev);
1869
1870 return rp->status;
1871 }
1872
hci_cc_le_add_to_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1873 static u8 hci_cc_le_add_to_accept_list(struct hci_dev *hdev, void *data,
1874 struct sk_buff *skb)
1875 {
1876 struct hci_cp_le_add_to_accept_list *sent;
1877 struct hci_ev_status *rp = data;
1878
1879 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1880
1881 if (rp->status)
1882 return rp->status;
1883
1884 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
1885 if (!sent)
1886 return rp->status;
1887
1888 hci_dev_lock(hdev);
1889 hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr,
1890 sent->bdaddr_type);
1891 hci_dev_unlock(hdev);
1892
1893 return rp->status;
1894 }
1895
hci_cc_le_del_from_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1896 static u8 hci_cc_le_del_from_accept_list(struct hci_dev *hdev, void *data,
1897 struct sk_buff *skb)
1898 {
1899 struct hci_cp_le_del_from_accept_list *sent;
1900 struct hci_ev_status *rp = data;
1901
1902 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1903
1904 if (rp->status)
1905 return rp->status;
1906
1907 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST);
1908 if (!sent)
1909 return rp->status;
1910
1911 hci_dev_lock(hdev);
1912 hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr,
1913 sent->bdaddr_type);
1914 hci_dev_unlock(hdev);
1915
1916 return rp->status;
1917 }
1918
hci_cc_le_read_supported_states(struct hci_dev * hdev,void * data,struct sk_buff * skb)1919 static u8 hci_cc_le_read_supported_states(struct hci_dev *hdev, void *data,
1920 struct sk_buff *skb)
1921 {
1922 struct hci_rp_le_read_supported_states *rp = data;
1923
1924 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1925
1926 if (rp->status)
1927 return rp->status;
1928
1929 memcpy(hdev->le_states, rp->le_states, 8);
1930
1931 return rp->status;
1932 }
1933
hci_cc_le_read_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1934 static u8 hci_cc_le_read_def_data_len(struct hci_dev *hdev, void *data,
1935 struct sk_buff *skb)
1936 {
1937 struct hci_rp_le_read_def_data_len *rp = data;
1938
1939 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1940
1941 if (rp->status)
1942 return rp->status;
1943
1944 hdev->le_def_tx_len = le16_to_cpu(rp->tx_len);
1945 hdev->le_def_tx_time = le16_to_cpu(rp->tx_time);
1946
1947 return rp->status;
1948 }
1949
hci_cc_le_write_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1950 static u8 hci_cc_le_write_def_data_len(struct hci_dev *hdev, void *data,
1951 struct sk_buff *skb)
1952 {
1953 struct hci_cp_le_write_def_data_len *sent;
1954 struct hci_ev_status *rp = data;
1955
1956 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1957
1958 if (rp->status)
1959 return rp->status;
1960
1961 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN);
1962 if (!sent)
1963 return rp->status;
1964
1965 hdev->le_def_tx_len = le16_to_cpu(sent->tx_len);
1966 hdev->le_def_tx_time = le16_to_cpu(sent->tx_time);
1967
1968 return rp->status;
1969 }
1970
hci_cc_le_add_to_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1971 static u8 hci_cc_le_add_to_resolv_list(struct hci_dev *hdev, void *data,
1972 struct sk_buff *skb)
1973 {
1974 struct hci_cp_le_add_to_resolv_list *sent;
1975 struct hci_ev_status *rp = data;
1976
1977 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1978
1979 if (rp->status)
1980 return rp->status;
1981
1982 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST);
1983 if (!sent)
1984 return rp->status;
1985
1986 hci_dev_lock(hdev);
1987 hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
1988 sent->bdaddr_type, sent->peer_irk,
1989 sent->local_irk);
1990 hci_dev_unlock(hdev);
1991
1992 return rp->status;
1993 }
1994
hci_cc_le_del_from_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1995 static u8 hci_cc_le_del_from_resolv_list(struct hci_dev *hdev, void *data,
1996 struct sk_buff *skb)
1997 {
1998 struct hci_cp_le_del_from_resolv_list *sent;
1999 struct hci_ev_status *rp = data;
2000
2001 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2002
2003 if (rp->status)
2004 return rp->status;
2005
2006 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST);
2007 if (!sent)
2008 return rp->status;
2009
2010 hci_dev_lock(hdev);
2011 hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
2012 sent->bdaddr_type);
2013 hci_dev_unlock(hdev);
2014
2015 return rp->status;
2016 }
2017
hci_cc_le_clear_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)2018 static u8 hci_cc_le_clear_resolv_list(struct hci_dev *hdev, void *data,
2019 struct sk_buff *skb)
2020 {
2021 struct hci_ev_status *rp = data;
2022
2023 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2024
2025 if (rp->status)
2026 return rp->status;
2027
2028 hci_dev_lock(hdev);
2029 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2030 hci_dev_unlock(hdev);
2031
2032 return rp->status;
2033 }
2034
hci_cc_le_read_resolv_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)2035 static u8 hci_cc_le_read_resolv_list_size(struct hci_dev *hdev, void *data,
2036 struct sk_buff *skb)
2037 {
2038 struct hci_rp_le_read_resolv_list_size *rp = data;
2039
2040 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
2041
2042 if (rp->status)
2043 return rp->status;
2044
2045 hdev->le_resolv_list_size = rp->size;
2046
2047 return rp->status;
2048 }
2049
hci_cc_le_set_addr_resolution_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)2050 static u8 hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev, void *data,
2051 struct sk_buff *skb)
2052 {
2053 struct hci_ev_status *rp = data;
2054 __u8 *sent;
2055
2056 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2057
2058 if (rp->status)
2059 return rp->status;
2060
2061 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE);
2062 if (!sent)
2063 return rp->status;
2064
2065 hci_dev_lock(hdev);
2066
2067 if (*sent)
2068 hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION);
2069 else
2070 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);
2071
2072 hci_dev_unlock(hdev);
2073
2074 return rp->status;
2075 }
2076
hci_cc_le_read_max_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)2077 static u8 hci_cc_le_read_max_data_len(struct hci_dev *hdev, void *data,
2078 struct sk_buff *skb)
2079 {
2080 struct hci_rp_le_read_max_data_len *rp = data;
2081
2082 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2083
2084 if (rp->status)
2085 return rp->status;
2086
2087 hdev->le_max_tx_len = le16_to_cpu(rp->tx_len);
2088 hdev->le_max_tx_time = le16_to_cpu(rp->tx_time);
2089 hdev->le_max_rx_len = le16_to_cpu(rp->rx_len);
2090 hdev->le_max_rx_time = le16_to_cpu(rp->rx_time);
2091
2092 return rp->status;
2093 }
2094
hci_cc_write_le_host_supported(struct hci_dev * hdev,void * data,struct sk_buff * skb)2095 static u8 hci_cc_write_le_host_supported(struct hci_dev *hdev, void *data,
2096 struct sk_buff *skb)
2097 {
2098 struct hci_cp_write_le_host_supported *sent;
2099 struct hci_ev_status *rp = data;
2100
2101 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2102
2103 if (rp->status)
2104 return rp->status;
2105
2106 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED);
2107 if (!sent)
2108 return rp->status;
2109
2110 hci_dev_lock(hdev);
2111
2112 if (sent->le) {
2113 hdev->features[1][0] |= LMP_HOST_LE;
2114 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
2115 } else {
2116 hdev->features[1][0] &= ~LMP_HOST_LE;
2117 hci_dev_clear_flag(hdev, HCI_LE_ENABLED);
2118 hci_dev_clear_flag(hdev, HCI_ADVERTISING);
2119 }
2120
2121 if (sent->simul)
2122 hdev->features[1][0] |= LMP_HOST_LE_BREDR;
2123 else
2124 hdev->features[1][0] &= ~LMP_HOST_LE_BREDR;
2125
2126 hci_dev_unlock(hdev);
2127
2128 return rp->status;
2129 }
2130
hci_cc_set_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2131 static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data,
2132 struct sk_buff *skb)
2133 {
2134 struct hci_cp_le_set_adv_param *cp;
2135 struct hci_ev_status *rp = data;
2136
2137 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2138
2139 if (rp->status)
2140 return rp->status;
2141
2142 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM);
2143 if (!cp)
2144 return rp->status;
2145
2146 hci_dev_lock(hdev);
2147 hdev->adv_addr_type = cp->own_address_type;
2148 hci_dev_unlock(hdev);
2149
2150 return rp->status;
2151 }
2152
hci_cc_set_ext_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2153 static u8 hci_cc_set_ext_adv_param(struct hci_dev *hdev, void *data,
2154 struct sk_buff *skb)
2155 {
2156 struct hci_rp_le_set_ext_adv_params *rp = data;
2157 struct hci_cp_le_set_ext_adv_params *cp;
2158 struct adv_info *adv_instance;
2159
2160 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2161
2162 if (rp->status)
2163 return rp->status;
2164
2165 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS);
2166 if (!cp)
2167 return rp->status;
2168
2169 hci_dev_lock(hdev);
2170 hdev->adv_addr_type = cp->own_addr_type;
2171 if (!cp->handle) {
2172 /* Store in hdev for instance 0 */
2173 hdev->adv_tx_power = rp->tx_power;
2174 } else {
2175 adv_instance = hci_find_adv_instance(hdev, cp->handle);
2176 if (adv_instance)
2177 adv_instance->tx_power = rp->tx_power;
2178 }
2179 /* Update adv data as tx power is known now */
2180 hci_update_adv_data(hdev, cp->handle);
2181
2182 hci_dev_unlock(hdev);
2183
2184 return rp->status;
2185 }
2186
hci_cc_read_rssi(struct hci_dev * hdev,void * data,struct sk_buff * skb)2187 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data,
2188 struct sk_buff *skb)
2189 {
2190 struct hci_rp_read_rssi *rp = data;
2191 struct hci_conn *conn;
2192
2193 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2194
2195 if (rp->status)
2196 return rp->status;
2197
2198 hci_dev_lock(hdev);
2199
2200 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2201 if (conn)
2202 conn->rssi = rp->rssi;
2203
2204 hci_dev_unlock(hdev);
2205
2206 return rp->status;
2207 }
2208
hci_cc_read_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)2209 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data,
2210 struct sk_buff *skb)
2211 {
2212 struct hci_cp_read_tx_power *sent;
2213 struct hci_rp_read_tx_power *rp = data;
2214 struct hci_conn *conn;
2215
2216 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2217
2218 if (rp->status)
2219 return rp->status;
2220
2221 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
2222 if (!sent)
2223 return rp->status;
2224
2225 hci_dev_lock(hdev);
2226
2227 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2228 if (!conn)
2229 goto unlock;
2230
2231 switch (sent->type) {
2232 case 0x00:
2233 conn->tx_power = rp->tx_power;
2234 break;
2235 case 0x01:
2236 conn->max_tx_power = rp->tx_power;
2237 break;
2238 }
2239
2240 unlock:
2241 hci_dev_unlock(hdev);
2242 return rp->status;
2243 }
2244
hci_cc_write_ssp_debug_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)2245 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data,
2246 struct sk_buff *skb)
2247 {
2248 struct hci_ev_status *rp = data;
2249 u8 *mode;
2250
2251 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2252
2253 if (rp->status)
2254 return rp->status;
2255
2256 mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
2257 if (mode)
2258 hdev->ssp_debug_mode = *mode;
2259
2260 return rp->status;
2261 }
2262
hci_cs_inquiry(struct hci_dev * hdev,__u8 status)2263 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
2264 {
2265 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2266
2267 if (status)
2268 return;
2269
2270 if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
2271 set_bit(HCI_INQUIRY, &hdev->flags);
2272 }
2273
hci_cs_create_conn(struct hci_dev * hdev,__u8 status)2274 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
2275 {
2276 struct hci_cp_create_conn *cp;
2277 struct hci_conn *conn;
2278
2279 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2280
2281 cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
2282 if (!cp)
2283 return;
2284
2285 hci_dev_lock(hdev);
2286
2287 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2288
2289 bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn);
2290
2291 if (status) {
2292 if (conn && conn->state == BT_CONNECT) {
2293 conn->state = BT_CLOSED;
2294 hci_connect_cfm(conn, status);
2295 hci_conn_del(conn);
2296 }
2297 } else {
2298 if (!conn) {
2299 conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
2300 HCI_ROLE_MASTER);
2301 if (IS_ERR(conn))
2302 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
2303 }
2304 }
2305
2306 hci_dev_unlock(hdev);
2307 }
2308
hci_cs_add_sco(struct hci_dev * hdev,__u8 status)2309 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
2310 {
2311 struct hci_cp_add_sco *cp;
2312 struct hci_conn *acl;
2313 struct hci_link *link;
2314 __u16 handle;
2315
2316 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2317
2318 if (!status)
2319 return;
2320
2321 cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
2322 if (!cp)
2323 return;
2324
2325 handle = __le16_to_cpu(cp->handle);
2326
2327 bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
2328
2329 hci_dev_lock(hdev);
2330
2331 acl = hci_conn_hash_lookup_handle(hdev, handle);
2332 if (acl) {
2333 link = list_first_entry_or_null(&acl->link_list,
2334 struct hci_link, list);
2335 if (link && link->conn) {
2336 link->conn->state = BT_CLOSED;
2337
2338 hci_connect_cfm(link->conn, status);
2339 hci_conn_del(link->conn);
2340 }
2341 }
2342
2343 hci_dev_unlock(hdev);
2344 }
2345
hci_cs_auth_requested(struct hci_dev * hdev,__u8 status)2346 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
2347 {
2348 struct hci_cp_auth_requested *cp;
2349 struct hci_conn *conn;
2350
2351 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2352
2353 if (!status)
2354 return;
2355
2356 cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
2357 if (!cp)
2358 return;
2359
2360 hci_dev_lock(hdev);
2361
2362 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2363 if (conn) {
2364 if (conn->state == BT_CONFIG) {
2365 hci_connect_cfm(conn, status);
2366 hci_conn_drop(conn);
2367 }
2368 }
2369
2370 hci_dev_unlock(hdev);
2371 }
2372
hci_cs_set_conn_encrypt(struct hci_dev * hdev,__u8 status)2373 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
2374 {
2375 struct hci_cp_set_conn_encrypt *cp;
2376 struct hci_conn *conn;
2377
2378 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2379
2380 if (!status)
2381 return;
2382
2383 cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
2384 if (!cp)
2385 return;
2386
2387 hci_dev_lock(hdev);
2388
2389 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2390 if (conn) {
2391 if (conn->state == BT_CONFIG) {
2392 hci_connect_cfm(conn, status);
2393 hci_conn_drop(conn);
2394 }
2395 }
2396
2397 hci_dev_unlock(hdev);
2398 }
2399
hci_outgoing_auth_needed(struct hci_dev * hdev,struct hci_conn * conn)2400 static int hci_outgoing_auth_needed(struct hci_dev *hdev,
2401 struct hci_conn *conn)
2402 {
2403 if (conn->state != BT_CONFIG || !conn->out)
2404 return 0;
2405
2406 if (conn->pending_sec_level == BT_SECURITY_SDP)
2407 return 0;
2408
2409 /* Only request authentication for SSP connections or non-SSP
2410 * devices with sec_level MEDIUM or HIGH or if MITM protection
2411 * is requested.
2412 */
2413 if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
2414 conn->pending_sec_level != BT_SECURITY_FIPS &&
2415 conn->pending_sec_level != BT_SECURITY_HIGH &&
2416 conn->pending_sec_level != BT_SECURITY_MEDIUM)
2417 return 0;
2418
2419 return 1;
2420 }
2421
hci_resolve_name(struct hci_dev * hdev,struct inquiry_entry * e)2422 static int hci_resolve_name(struct hci_dev *hdev,
2423 struct inquiry_entry *e)
2424 {
2425 struct hci_cp_remote_name_req cp;
2426
2427 memset(&cp, 0, sizeof(cp));
2428
2429 bacpy(&cp.bdaddr, &e->data.bdaddr);
2430 cp.pscan_rep_mode = e->data.pscan_rep_mode;
2431 cp.pscan_mode = e->data.pscan_mode;
2432 cp.clock_offset = e->data.clock_offset;
2433
2434 return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
2435 }
2436
hci_resolve_next_name(struct hci_dev * hdev)2437 static bool hci_resolve_next_name(struct hci_dev *hdev)
2438 {
2439 struct discovery_state *discov = &hdev->discovery;
2440 struct inquiry_entry *e;
2441
2442 if (list_empty(&discov->resolve))
2443 return false;
2444
2445 /* We should stop if we already spent too much time resolving names. */
2446 if (time_after(jiffies, discov->name_resolve_timeout)) {
2447 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long.");
2448 return false;
2449 }
2450
2451 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2452 if (!e)
2453 return false;
2454
2455 if (hci_resolve_name(hdev, e) == 0) {
2456 e->name_state = NAME_PENDING;
2457 return true;
2458 }
2459
2460 return false;
2461 }
2462
hci_check_pending_name(struct hci_dev * hdev,struct hci_conn * conn,bdaddr_t * bdaddr,u8 * name,u8 name_len)2463 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
2464 bdaddr_t *bdaddr, u8 *name, u8 name_len)
2465 {
2466 struct discovery_state *discov = &hdev->discovery;
2467 struct inquiry_entry *e;
2468
2469 /* Update the mgmt connected state if necessary. Be careful with
2470 * conn objects that exist but are not (yet) connected however.
2471 * Only those in BT_CONFIG or BT_CONNECTED states can be
2472 * considered connected.
2473 */
2474 if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED))
2475 mgmt_device_connected(hdev, conn, name, name_len);
2476
2477 if (discov->state == DISCOVERY_STOPPED)
2478 return;
2479
2480 if (discov->state == DISCOVERY_STOPPING)
2481 goto discov_complete;
2482
2483 if (discov->state != DISCOVERY_RESOLVING)
2484 return;
2485
2486 e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
2487 /* If the device was not found in a list of found devices names of which
2488 * are pending. there is no need to continue resolving a next name as it
2489 * will be done upon receiving another Remote Name Request Complete
2490 * Event */
2491 if (!e)
2492 return;
2493
2494 list_del(&e->list);
2495
2496 e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN;
2497 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi,
2498 name, name_len);
2499
2500 if (hci_resolve_next_name(hdev))
2501 return;
2502
2503 discov_complete:
2504 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2505 }
2506
hci_cs_remote_name_req(struct hci_dev * hdev,__u8 status)2507 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
2508 {
2509 struct hci_cp_remote_name_req *cp;
2510 struct hci_conn *conn;
2511
2512 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2513
2514 /* If successful wait for the name req complete event before
2515 * checking for the need to do authentication */
2516 if (!status)
2517 return;
2518
2519 cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
2520 if (!cp)
2521 return;
2522
2523 hci_dev_lock(hdev);
2524
2525 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2526
2527 if (hci_dev_test_flag(hdev, HCI_MGMT))
2528 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
2529
2530 if (!conn)
2531 goto unlock;
2532
2533 if (!hci_outgoing_auth_needed(hdev, conn))
2534 goto unlock;
2535
2536 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2537 struct hci_cp_auth_requested auth_cp;
2538
2539 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2540
2541 auth_cp.handle = __cpu_to_le16(conn->handle);
2542 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
2543 sizeof(auth_cp), &auth_cp);
2544 }
2545
2546 unlock:
2547 hci_dev_unlock(hdev);
2548 }
2549
hci_cs_read_remote_features(struct hci_dev * hdev,__u8 status)2550 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
2551 {
2552 struct hci_cp_read_remote_features *cp;
2553 struct hci_conn *conn;
2554
2555 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2556
2557 if (!status)
2558 return;
2559
2560 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
2561 if (!cp)
2562 return;
2563
2564 hci_dev_lock(hdev);
2565
2566 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2567 if (conn) {
2568 if (conn->state == BT_CONFIG) {
2569 hci_connect_cfm(conn, status);
2570 hci_conn_drop(conn);
2571 }
2572 }
2573
2574 hci_dev_unlock(hdev);
2575 }
2576
hci_cs_read_remote_ext_features(struct hci_dev * hdev,__u8 status)2577 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
2578 {
2579 struct hci_cp_read_remote_ext_features *cp;
2580 struct hci_conn *conn;
2581
2582 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2583
2584 if (!status)
2585 return;
2586
2587 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
2588 if (!cp)
2589 return;
2590
2591 hci_dev_lock(hdev);
2592
2593 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2594 if (conn) {
2595 if (conn->state == BT_CONFIG) {
2596 hci_connect_cfm(conn, status);
2597 hci_conn_drop(conn);
2598 }
2599 }
2600
2601 hci_dev_unlock(hdev);
2602 }
2603
hci_setup_sync_conn_status(struct hci_dev * hdev,__u16 handle,__u8 status)2604 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle,
2605 __u8 status)
2606 {
2607 struct hci_conn *acl;
2608 struct hci_link *link;
2609
2610 bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status);
2611
2612 hci_dev_lock(hdev);
2613
2614 acl = hci_conn_hash_lookup_handle(hdev, handle);
2615 if (acl) {
2616 link = list_first_entry_or_null(&acl->link_list,
2617 struct hci_link, list);
2618 if (link && link->conn) {
2619 link->conn->state = BT_CLOSED;
2620
2621 hci_connect_cfm(link->conn, status);
2622 hci_conn_del(link->conn);
2623 }
2624 }
2625
2626 hci_dev_unlock(hdev);
2627 }
2628
hci_cs_setup_sync_conn(struct hci_dev * hdev,__u8 status)2629 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2630 {
2631 struct hci_cp_setup_sync_conn *cp;
2632
2633 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2634
2635 if (!status)
2636 return;
2637
2638 cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
2639 if (!cp)
2640 return;
2641
2642 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2643 }
2644
hci_cs_enhanced_setup_sync_conn(struct hci_dev * hdev,__u8 status)2645 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2646 {
2647 struct hci_cp_enhanced_setup_sync_conn *cp;
2648
2649 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2650
2651 if (!status)
2652 return;
2653
2654 cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN);
2655 if (!cp)
2656 return;
2657
2658 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2659 }
2660
hci_cs_sniff_mode(struct hci_dev * hdev,__u8 status)2661 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
2662 {
2663 struct hci_cp_sniff_mode *cp;
2664 struct hci_conn *conn;
2665
2666 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2667
2668 if (!status)
2669 return;
2670
2671 cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
2672 if (!cp)
2673 return;
2674
2675 hci_dev_lock(hdev);
2676
2677 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2678 if (conn) {
2679 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2680
2681 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2682 hci_sco_setup(conn, status);
2683 }
2684
2685 hci_dev_unlock(hdev);
2686 }
2687
hci_cs_exit_sniff_mode(struct hci_dev * hdev,__u8 status)2688 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
2689 {
2690 struct hci_cp_exit_sniff_mode *cp;
2691 struct hci_conn *conn;
2692
2693 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2694
2695 if (!status)
2696 return;
2697
2698 cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
2699 if (!cp)
2700 return;
2701
2702 hci_dev_lock(hdev);
2703
2704 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2705 if (conn) {
2706 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2707
2708 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2709 hci_sco_setup(conn, status);
2710 }
2711
2712 hci_dev_unlock(hdev);
2713 }
2714
hci_cs_disconnect(struct hci_dev * hdev,u8 status)2715 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
2716 {
2717 struct hci_cp_disconnect *cp;
2718 struct hci_conn_params *params;
2719 struct hci_conn *conn;
2720 bool mgmt_conn;
2721
2722 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2723
2724 /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
2725 * otherwise cleanup the connection immediately.
2726 */
2727 if (!status && !hdev->suspended)
2728 return;
2729
2730 cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
2731 if (!cp)
2732 return;
2733
2734 hci_dev_lock(hdev);
2735
2736 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2737 if (!conn)
2738 goto unlock;
2739
2740 if (status) {
2741 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2742 conn->dst_type, status);
2743
2744 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
2745 hdev->cur_adv_instance = conn->adv_instance;
2746 hci_enable_advertising(hdev);
2747 }
2748
2749 /* Inform sockets conn is gone before we delete it */
2750 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED);
2751
2752 goto done;
2753 }
2754
2755 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
2756
2757 if (conn->type == ACL_LINK) {
2758 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
2759 hci_remove_link_key(hdev, &conn->dst);
2760 }
2761
2762 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
2763 if (params) {
2764 switch (params->auto_connect) {
2765 case HCI_AUTO_CONN_LINK_LOSS:
2766 if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT)
2767 break;
2768 fallthrough;
2769
2770 case HCI_AUTO_CONN_DIRECT:
2771 case HCI_AUTO_CONN_ALWAYS:
2772 hci_pend_le_list_del_init(params);
2773 hci_pend_le_list_add(params, &hdev->pend_le_conns);
2774 break;
2775
2776 default:
2777 break;
2778 }
2779 }
2780
2781 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
2782 cp->reason, mgmt_conn);
2783
2784 hci_disconn_cfm(conn, cp->reason);
2785
2786 done:
2787 /* If the disconnection failed for any reason, the upper layer
2788 * does not retry to disconnect in current implementation.
2789 * Hence, we need to do some basic cleanup here and re-enable
2790 * advertising if necessary.
2791 */
2792 hci_conn_del(conn);
2793 unlock:
2794 hci_dev_unlock(hdev);
2795 }
2796
ev_bdaddr_type(struct hci_dev * hdev,u8 type,bool * resolved)2797 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved)
2798 {
2799 /* When using controller based address resolution, then the new
2800 * address types 0x02 and 0x03 are used. These types need to be
2801 * converted back into either public address or random address type
2802 */
2803 switch (type) {
2804 case ADDR_LE_DEV_PUBLIC_RESOLVED:
2805 if (resolved)
2806 *resolved = true;
2807 return ADDR_LE_DEV_PUBLIC;
2808 case ADDR_LE_DEV_RANDOM_RESOLVED:
2809 if (resolved)
2810 *resolved = true;
2811 return ADDR_LE_DEV_RANDOM;
2812 }
2813
2814 if (resolved)
2815 *resolved = false;
2816 return type;
2817 }
2818
cs_le_create_conn(struct hci_dev * hdev,bdaddr_t * peer_addr,u8 peer_addr_type,u8 own_address_type,u8 filter_policy)2819 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
2820 u8 peer_addr_type, u8 own_address_type,
2821 u8 filter_policy)
2822 {
2823 struct hci_conn *conn;
2824
2825 conn = hci_conn_hash_lookup_le(hdev, peer_addr,
2826 peer_addr_type);
2827 if (!conn)
2828 return;
2829
2830 own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL);
2831
2832 /* Store the initiator and responder address information which
2833 * is needed for SMP. These values will not change during the
2834 * lifetime of the connection.
2835 */
2836 conn->init_addr_type = own_address_type;
2837 if (own_address_type == ADDR_LE_DEV_RANDOM)
2838 bacpy(&conn->init_addr, &hdev->random_addr);
2839 else
2840 bacpy(&conn->init_addr, &hdev->bdaddr);
2841
2842 conn->resp_addr_type = peer_addr_type;
2843 bacpy(&conn->resp_addr, peer_addr);
2844 }
2845
hci_cs_le_create_conn(struct hci_dev * hdev,u8 status)2846 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
2847 {
2848 struct hci_cp_le_create_conn *cp;
2849
2850 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2851
2852 /* All connection failure handling is taken care of by the
2853 * hci_conn_failed function which is triggered by the HCI
2854 * request completion callbacks used for connecting.
2855 */
2856 if (status)
2857 return;
2858
2859 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
2860 if (!cp)
2861 return;
2862
2863 hci_dev_lock(hdev);
2864
2865 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2866 cp->own_address_type, cp->filter_policy);
2867
2868 hci_dev_unlock(hdev);
2869 }
2870
hci_cs_le_ext_create_conn(struct hci_dev * hdev,u8 status)2871 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
2872 {
2873 struct hci_cp_le_ext_create_conn *cp;
2874
2875 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2876
2877 /* All connection failure handling is taken care of by the
2878 * hci_conn_failed function which is triggered by the HCI
2879 * request completion callbacks used for connecting.
2880 */
2881 if (status)
2882 return;
2883
2884 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
2885 if (!cp)
2886 return;
2887
2888 hci_dev_lock(hdev);
2889
2890 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2891 cp->own_addr_type, cp->filter_policy);
2892
2893 hci_dev_unlock(hdev);
2894 }
2895
hci_cs_le_read_remote_features(struct hci_dev * hdev,u8 status)2896 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
2897 {
2898 struct hci_cp_le_read_remote_features *cp;
2899 struct hci_conn *conn;
2900
2901 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2902
2903 if (!status)
2904 return;
2905
2906 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
2907 if (!cp)
2908 return;
2909
2910 hci_dev_lock(hdev);
2911
2912 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2913 if (conn) {
2914 if (conn->state == BT_CONFIG) {
2915 hci_connect_cfm(conn, status);
2916 hci_conn_drop(conn);
2917 }
2918 }
2919
2920 hci_dev_unlock(hdev);
2921 }
2922
hci_cs_le_start_enc(struct hci_dev * hdev,u8 status)2923 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
2924 {
2925 struct hci_cp_le_start_enc *cp;
2926 struct hci_conn *conn;
2927
2928 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2929
2930 if (!status)
2931 return;
2932
2933 hci_dev_lock(hdev);
2934
2935 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
2936 if (!cp)
2937 goto unlock;
2938
2939 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2940 if (!conn)
2941 goto unlock;
2942
2943 if (conn->state != BT_CONNECTED)
2944 goto unlock;
2945
2946 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
2947 hci_conn_drop(conn);
2948
2949 unlock:
2950 hci_dev_unlock(hdev);
2951 }
2952
hci_cs_switch_role(struct hci_dev * hdev,u8 status)2953 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
2954 {
2955 struct hci_cp_switch_role *cp;
2956 struct hci_conn *conn;
2957
2958 BT_DBG("%s status 0x%2.2x", hdev->name, status);
2959
2960 if (!status)
2961 return;
2962
2963 cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
2964 if (!cp)
2965 return;
2966
2967 hci_dev_lock(hdev);
2968
2969 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2970 if (conn)
2971 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
2972
2973 hci_dev_unlock(hdev);
2974 }
2975
hci_inquiry_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)2976 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data,
2977 struct sk_buff *skb)
2978 {
2979 struct hci_ev_status *ev = data;
2980 struct discovery_state *discov = &hdev->discovery;
2981 struct inquiry_entry *e;
2982
2983 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
2984
2985 if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
2986 return;
2987
2988 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
2989 wake_up_bit(&hdev->flags, HCI_INQUIRY);
2990
2991 if (!hci_dev_test_flag(hdev, HCI_MGMT))
2992 return;
2993
2994 hci_dev_lock(hdev);
2995
2996 if (discov->state != DISCOVERY_FINDING)
2997 goto unlock;
2998
2999 if (list_empty(&discov->resolve)) {
3000 /* When BR/EDR inquiry is active and no LE scanning is in
3001 * progress, then change discovery state to indicate completion.
3002 *
3003 * When running LE scanning and BR/EDR inquiry simultaneously
3004 * and the LE scan already finished, then change the discovery
3005 * state to indicate completion.
3006 */
3007 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
3008 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
3009 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3010 goto unlock;
3011 }
3012
3013 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
3014 if (e && hci_resolve_name(hdev, e) == 0) {
3015 e->name_state = NAME_PENDING;
3016 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
3017 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION;
3018 } else {
3019 /* When BR/EDR inquiry is active and no LE scanning is in
3020 * progress, then change discovery state to indicate completion.
3021 *
3022 * When running LE scanning and BR/EDR inquiry simultaneously
3023 * and the LE scan already finished, then change the discovery
3024 * state to indicate completion.
3025 */
3026 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
3027 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
3028 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3029 }
3030
3031 unlock:
3032 hci_dev_unlock(hdev);
3033 }
3034
hci_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)3035 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata,
3036 struct sk_buff *skb)
3037 {
3038 struct hci_ev_inquiry_result *ev = edata;
3039 struct inquiry_data data;
3040 int i;
3041
3042 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT,
3043 flex_array_size(ev, info, ev->num)))
3044 return;
3045
3046 bt_dev_dbg(hdev, "num %d", ev->num);
3047
3048 if (!ev->num)
3049 return;
3050
3051 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
3052 return;
3053
3054 hci_dev_lock(hdev);
3055
3056 for (i = 0; i < ev->num; i++) {
3057 struct inquiry_info *info = &ev->info[i];
3058 u32 flags;
3059
3060 bacpy(&data.bdaddr, &info->bdaddr);
3061 data.pscan_rep_mode = info->pscan_rep_mode;
3062 data.pscan_period_mode = info->pscan_period_mode;
3063 data.pscan_mode = info->pscan_mode;
3064 memcpy(data.dev_class, info->dev_class, 3);
3065 data.clock_offset = info->clock_offset;
3066 data.rssi = HCI_RSSI_INVALID;
3067 data.ssp_mode = 0x00;
3068
3069 flags = hci_inquiry_cache_update(hdev, &data, false);
3070
3071 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3072 info->dev_class, HCI_RSSI_INVALID,
3073 flags, NULL, 0, NULL, 0, 0);
3074 }
3075
3076 hci_dev_unlock(hdev);
3077 }
3078
hci_read_enc_key_size(struct hci_dev * hdev,struct hci_conn * conn)3079 static int hci_read_enc_key_size(struct hci_dev *hdev, struct hci_conn *conn)
3080 {
3081 struct hci_cp_read_enc_key_size cp;
3082 u8 *key_enc_size = hci_conn_key_enc_size(conn);
3083
3084 if (!read_key_size_capable(hdev)) {
3085 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3086 return -EOPNOTSUPP;
3087 }
3088
3089 bt_dev_dbg(hdev, "hcon %p", conn);
3090
3091 memset(&cp, 0, sizeof(cp));
3092 cp.handle = cpu_to_le16(conn->handle);
3093
3094 /* If the key enc_size is already known, use it as conn->enc_key_size,
3095 * otherwise use hdev->min_enc_key_size so the likes of
3096 * l2cap_check_enc_key_size don't fail while waiting for
3097 * HCI_OP_READ_ENC_KEY_SIZE response.
3098 */
3099 if (key_enc_size && *key_enc_size)
3100 conn->enc_key_size = *key_enc_size;
3101 else
3102 conn->enc_key_size = hdev->min_enc_key_size;
3103
3104 return hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE, sizeof(cp), &cp);
3105 }
3106
hci_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3107 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
3108 struct sk_buff *skb)
3109 {
3110 struct hci_ev_conn_complete *ev = data;
3111 struct hci_conn *conn;
3112 u8 status = ev->status;
3113
3114 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3115
3116 hci_dev_lock(hdev);
3117
3118 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
3119 if (!conn) {
3120 /* In case of error status and there is no connection pending
3121 * just unlock as there is nothing to cleanup.
3122 */
3123 if (ev->status)
3124 goto unlock;
3125
3126 /* Connection may not exist if auto-connected. Check the bredr
3127 * allowlist to see if this device is allowed to auto connect.
3128 * If link is an ACL type, create a connection class
3129 * automatically.
3130 *
3131 * Auto-connect will only occur if the event filter is
3132 * programmed with a given address. Right now, event filter is
3133 * only used during suspend.
3134 */
3135 if (ev->link_type == ACL_LINK &&
3136 hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
3137 &ev->bdaddr,
3138 BDADDR_BREDR)) {
3139 conn = hci_conn_add_unset(hdev, ev->link_type,
3140 &ev->bdaddr, HCI_ROLE_SLAVE);
3141 if (IS_ERR(conn)) {
3142 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3143 goto unlock;
3144 }
3145 } else {
3146 if (ev->link_type != SCO_LINK)
3147 goto unlock;
3148
3149 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK,
3150 &ev->bdaddr);
3151 if (!conn)
3152 goto unlock;
3153
3154 conn->type = SCO_LINK;
3155 }
3156 }
3157
3158 /* The HCI_Connection_Complete event is only sent once per connection.
3159 * Processing it more than once per connection can corrupt kernel memory.
3160 *
3161 * As the connection handle is set here for the first time, it indicates
3162 * whether the connection is already set up.
3163 */
3164 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
3165 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
3166 goto unlock;
3167 }
3168
3169 if (!status) {
3170 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
3171 if (status)
3172 goto done;
3173
3174 if (conn->type == ACL_LINK) {
3175 conn->state = BT_CONFIG;
3176 hci_conn_hold(conn);
3177
3178 if (!conn->out && !hci_conn_ssp_enabled(conn) &&
3179 !hci_find_link_key(hdev, &ev->bdaddr))
3180 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
3181 else
3182 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3183 } else
3184 conn->state = BT_CONNECTED;
3185
3186 hci_debugfs_create_conn(conn);
3187 hci_conn_add_sysfs(conn);
3188
3189 if (test_bit(HCI_AUTH, &hdev->flags))
3190 set_bit(HCI_CONN_AUTH, &conn->flags);
3191
3192 if (test_bit(HCI_ENCRYPT, &hdev->flags))
3193 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3194
3195 /* "Link key request" completed ahead of "connect request" completes */
3196 if (ev->encr_mode == 1 && !test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3197 ev->link_type == ACL_LINK) {
3198 struct link_key *key;
3199
3200 key = hci_find_link_key(hdev, &ev->bdaddr);
3201 if (key) {
3202 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3203 hci_read_enc_key_size(hdev, conn);
3204 hci_encrypt_cfm(conn, ev->status);
3205 }
3206 }
3207
3208 /* Get remote features */
3209 if (conn->type == ACL_LINK) {
3210 struct hci_cp_read_remote_features cp;
3211 cp.handle = ev->handle;
3212 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
3213 sizeof(cp), &cp);
3214
3215 hci_update_scan(hdev);
3216 }
3217
3218 /* Set packet type for incoming connection */
3219 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
3220 struct hci_cp_change_conn_ptype cp;
3221 cp.handle = ev->handle;
3222 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3223 hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
3224 &cp);
3225 }
3226 }
3227
3228 if (conn->type == ACL_LINK)
3229 hci_sco_setup(conn, ev->status);
3230
3231 done:
3232 if (status) {
3233 hci_conn_failed(conn, status);
3234 } else if (ev->link_type == SCO_LINK) {
3235 switch (conn->setting & SCO_AIRMODE_MASK) {
3236 case SCO_AIRMODE_CVSD:
3237 if (hdev->notify)
3238 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
3239 break;
3240 }
3241
3242 hci_connect_cfm(conn, status);
3243 }
3244
3245 unlock:
3246 hci_dev_unlock(hdev);
3247 }
3248
hci_reject_conn(struct hci_dev * hdev,bdaddr_t * bdaddr)3249 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
3250 {
3251 struct hci_cp_reject_conn_req cp;
3252
3253 bacpy(&cp.bdaddr, bdaddr);
3254 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
3255 hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
3256 }
3257
hci_conn_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3258 static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
3259 struct sk_buff *skb)
3260 {
3261 struct hci_ev_conn_request *ev = data;
3262 int mask = hdev->link_mode;
3263 struct inquiry_entry *ie;
3264 struct hci_conn *conn;
3265 __u8 flags = 0;
3266
3267 bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type);
3268
3269 /* Reject incoming connection from device with same BD ADDR against
3270 * CVE-2020-26555
3271 */
3272 if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
3273 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
3274 &ev->bdaddr);
3275 hci_reject_conn(hdev, &ev->bdaddr);
3276 return;
3277 }
3278
3279 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
3280 &flags);
3281
3282 if (!(mask & HCI_LM_ACCEPT)) {
3283 hci_reject_conn(hdev, &ev->bdaddr);
3284 return;
3285 }
3286
3287 hci_dev_lock(hdev);
3288
3289 if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
3290 BDADDR_BREDR)) {
3291 hci_reject_conn(hdev, &ev->bdaddr);
3292 goto unlock;
3293 }
3294
3295 /* Require HCI_CONNECTABLE or an accept list entry to accept the
3296 * connection. These features are only touched through mgmt so
3297 * only do the checks if HCI_MGMT is set.
3298 */
3299 if (hci_dev_test_flag(hdev, HCI_MGMT) &&
3300 !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
3301 !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
3302 BDADDR_BREDR)) {
3303 hci_reject_conn(hdev, &ev->bdaddr);
3304 goto unlock;
3305 }
3306
3307 /* Connection accepted */
3308
3309 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3310 if (ie)
3311 memcpy(ie->data.dev_class, ev->dev_class, 3);
3312
3313 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
3314 &ev->bdaddr);
3315 if (!conn) {
3316 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr,
3317 HCI_ROLE_SLAVE);
3318 if (IS_ERR(conn)) {
3319 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3320 goto unlock;
3321 }
3322 }
3323
3324 memcpy(conn->dev_class, ev->dev_class, 3);
3325
3326 hci_dev_unlock(hdev);
3327
3328 if (ev->link_type == ACL_LINK ||
3329 (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
3330 struct hci_cp_accept_conn_req cp;
3331 conn->state = BT_CONNECT;
3332
3333 bacpy(&cp.bdaddr, &ev->bdaddr);
3334
3335 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
3336 cp.role = 0x00; /* Become central */
3337 else
3338 cp.role = 0x01; /* Remain peripheral */
3339
3340 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
3341 } else if (!(flags & HCI_PROTO_DEFER)) {
3342 struct hci_cp_accept_sync_conn_req cp;
3343 conn->state = BT_CONNECT;
3344
3345 bacpy(&cp.bdaddr, &ev->bdaddr);
3346 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3347
3348 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
3349 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
3350 cp.max_latency = cpu_to_le16(0xffff);
3351 cp.content_format = cpu_to_le16(hdev->voice_setting);
3352 cp.retrans_effort = 0xff;
3353
3354 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
3355 &cp);
3356 } else {
3357 conn->state = BT_CONNECT2;
3358 hci_connect_cfm(conn, 0);
3359 }
3360
3361 return;
3362 unlock:
3363 hci_dev_unlock(hdev);
3364 }
3365
hci_to_mgmt_reason(u8 err)3366 static u8 hci_to_mgmt_reason(u8 err)
3367 {
3368 switch (err) {
3369 case HCI_ERROR_CONNECTION_TIMEOUT:
3370 return MGMT_DEV_DISCONN_TIMEOUT;
3371 case HCI_ERROR_REMOTE_USER_TERM:
3372 case HCI_ERROR_REMOTE_LOW_RESOURCES:
3373 case HCI_ERROR_REMOTE_POWER_OFF:
3374 return MGMT_DEV_DISCONN_REMOTE;
3375 case HCI_ERROR_LOCAL_HOST_TERM:
3376 return MGMT_DEV_DISCONN_LOCAL_HOST;
3377 default:
3378 return MGMT_DEV_DISCONN_UNKNOWN;
3379 }
3380 }
3381
hci_disconn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3382 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
3383 struct sk_buff *skb)
3384 {
3385 struct hci_ev_disconn_complete *ev = data;
3386 u8 reason;
3387 struct hci_conn_params *params;
3388 struct hci_conn *conn;
3389 bool mgmt_connected;
3390
3391 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3392
3393 hci_dev_lock(hdev);
3394
3395 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3396 if (!conn)
3397 goto unlock;
3398
3399 if (ev->status) {
3400 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
3401 conn->dst_type, ev->status);
3402 goto unlock;
3403 }
3404
3405 conn->state = BT_CLOSED;
3406
3407 mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
3408
3409 if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
3410 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
3411 else
3412 reason = hci_to_mgmt_reason(ev->reason);
3413
3414 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
3415 reason, mgmt_connected);
3416
3417 if (conn->type == ACL_LINK) {
3418 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
3419 hci_remove_link_key(hdev, &conn->dst);
3420
3421 hci_update_scan(hdev);
3422 }
3423
3424 /* Re-enable passive scanning if disconnected device is marked
3425 * as auto-connectable.
3426 */
3427 if (conn->type == LE_LINK) {
3428 params = hci_conn_params_lookup(hdev, &conn->dst,
3429 conn->dst_type);
3430 if (params) {
3431 switch (params->auto_connect) {
3432 case HCI_AUTO_CONN_LINK_LOSS:
3433 if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
3434 break;
3435 fallthrough;
3436
3437 case HCI_AUTO_CONN_DIRECT:
3438 case HCI_AUTO_CONN_ALWAYS:
3439 hci_pend_le_list_del_init(params);
3440 hci_pend_le_list_add(params,
3441 &hdev->pend_le_conns);
3442 hci_update_passive_scan(hdev);
3443 break;
3444
3445 default:
3446 break;
3447 }
3448 }
3449 }
3450
3451 hci_disconn_cfm(conn, ev->reason);
3452
3453 /* Re-enable advertising if necessary, since it might
3454 * have been disabled by the connection. From the
3455 * HCI_LE_Set_Advertise_Enable command description in
3456 * the core specification (v4.0):
3457 * "The Controller shall continue advertising until the Host
3458 * issues an LE_Set_Advertise_Enable command with
3459 * Advertising_Enable set to 0x00 (Advertising is disabled)
3460 * or until a connection is created or until the Advertising
3461 * is timed out due to Directed Advertising."
3462 */
3463 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
3464 hdev->cur_adv_instance = conn->adv_instance;
3465 hci_enable_advertising(hdev);
3466 }
3467
3468 hci_conn_del(conn);
3469
3470 unlock:
3471 hci_dev_unlock(hdev);
3472 }
3473
hci_auth_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3474 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data,
3475 struct sk_buff *skb)
3476 {
3477 struct hci_ev_auth_complete *ev = data;
3478 struct hci_conn *conn;
3479
3480 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3481
3482 hci_dev_lock(hdev);
3483
3484 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3485 if (!conn)
3486 goto unlock;
3487
3488 if (!ev->status) {
3489 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3490 set_bit(HCI_CONN_AUTH, &conn->flags);
3491 conn->sec_level = conn->pending_sec_level;
3492 } else {
3493 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3494 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3495
3496 mgmt_auth_failed(conn, ev->status);
3497 }
3498
3499 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3500
3501 if (conn->state == BT_CONFIG) {
3502 if (!ev->status && hci_conn_ssp_enabled(conn)) {
3503 struct hci_cp_set_conn_encrypt cp;
3504 cp.handle = ev->handle;
3505 cp.encrypt = 0x01;
3506 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3507 &cp);
3508 } else {
3509 conn->state = BT_CONNECTED;
3510 hci_connect_cfm(conn, ev->status);
3511 hci_conn_drop(conn);
3512 }
3513 } else {
3514 hci_auth_cfm(conn, ev->status);
3515
3516 hci_conn_hold(conn);
3517 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3518 hci_conn_drop(conn);
3519 }
3520
3521 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
3522 if (!ev->status) {
3523 struct hci_cp_set_conn_encrypt cp;
3524 cp.handle = ev->handle;
3525 cp.encrypt = 0x01;
3526 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3527 &cp);
3528 } else {
3529 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3530 hci_encrypt_cfm(conn, ev->status);
3531 }
3532 }
3533
3534 unlock:
3535 hci_dev_unlock(hdev);
3536 }
3537
hci_remote_name_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3538 static void hci_remote_name_evt(struct hci_dev *hdev, void *data,
3539 struct sk_buff *skb)
3540 {
3541 struct hci_ev_remote_name *ev = data;
3542 struct hci_conn *conn;
3543
3544 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3545
3546 hci_dev_lock(hdev);
3547
3548 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3549
3550 if (!hci_dev_test_flag(hdev, HCI_MGMT))
3551 goto check_auth;
3552
3553 if (ev->status == 0)
3554 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
3555 strnlen(ev->name, HCI_MAX_NAME_LENGTH));
3556 else
3557 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
3558
3559 check_auth:
3560 if (!conn)
3561 goto unlock;
3562
3563 if (!hci_outgoing_auth_needed(hdev, conn))
3564 goto unlock;
3565
3566 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
3567 struct hci_cp_auth_requested cp;
3568
3569 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
3570
3571 cp.handle = __cpu_to_le16(conn->handle);
3572 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
3573 }
3574
3575 unlock:
3576 hci_dev_unlock(hdev);
3577 }
3578
hci_encrypt_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3579 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data,
3580 struct sk_buff *skb)
3581 {
3582 struct hci_ev_encrypt_change *ev = data;
3583 struct hci_conn *conn;
3584
3585 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3586
3587 hci_dev_lock(hdev);
3588
3589 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3590 if (!conn)
3591 goto unlock;
3592
3593 if (!ev->status) {
3594 if (ev->encrypt) {
3595 /* Encryption implies authentication */
3596 set_bit(HCI_CONN_AUTH, &conn->flags);
3597 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3598 conn->sec_level = conn->pending_sec_level;
3599
3600 /* P-256 authentication key implies FIPS */
3601 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
3602 set_bit(HCI_CONN_FIPS, &conn->flags);
3603
3604 if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
3605 conn->type == LE_LINK)
3606 set_bit(HCI_CONN_AES_CCM, &conn->flags);
3607 } else {
3608 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
3609 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
3610 }
3611 }
3612
3613 /* We should disregard the current RPA and generate a new one
3614 * whenever the encryption procedure fails.
3615 */
3616 if (ev->status && conn->type == LE_LINK) {
3617 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
3618 hci_adv_instances_set_rpa_expired(hdev, true);
3619 }
3620
3621 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3622
3623 /* Check link security requirements are met */
3624 if (!hci_conn_check_link_mode(conn))
3625 ev->status = HCI_ERROR_AUTH_FAILURE;
3626
3627 if (ev->status && conn->state == BT_CONNECTED) {
3628 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3629 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3630
3631 /* Notify upper layers so they can cleanup before
3632 * disconnecting.
3633 */
3634 hci_encrypt_cfm(conn, ev->status);
3635 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
3636 hci_conn_drop(conn);
3637 goto unlock;
3638 }
3639
3640 /* Try reading the encryption key size for encrypted ACL links */
3641 if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
3642 if (hci_read_enc_key_size(hdev, conn))
3643 goto notify;
3644
3645 goto unlock;
3646 }
3647
3648 /* We skip the WRITE_AUTH_PAYLOAD_TIMEOUT for ATS2851 based controllers
3649 * to avoid unexpected SMP command errors when pairing.
3650 */
3651 if (test_bit(HCI_QUIRK_BROKEN_WRITE_AUTH_PAYLOAD_TIMEOUT,
3652 &hdev->quirks))
3653 goto notify;
3654
3655 /* Set the default Authenticated Payload Timeout after
3656 * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
3657 * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
3658 * sent when the link is active and Encryption is enabled, the conn
3659 * type can be either LE or ACL and controller must support LMP Ping.
3660 * Ensure for AES-CCM encryption as well.
3661 */
3662 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3663 test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
3664 ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
3665 (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
3666 struct hci_cp_write_auth_payload_to cp;
3667
3668 cp.handle = cpu_to_le16(conn->handle);
3669 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
3670 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
3671 sizeof(cp), &cp))
3672 bt_dev_err(hdev, "write auth payload timeout failed");
3673 }
3674
3675 notify:
3676 hci_encrypt_cfm(conn, ev->status);
3677
3678 unlock:
3679 hci_dev_unlock(hdev);
3680 }
3681
hci_change_link_key_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3682 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data,
3683 struct sk_buff *skb)
3684 {
3685 struct hci_ev_change_link_key_complete *ev = data;
3686 struct hci_conn *conn;
3687
3688 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3689
3690 hci_dev_lock(hdev);
3691
3692 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3693 if (conn) {
3694 if (!ev->status)
3695 set_bit(HCI_CONN_SECURE, &conn->flags);
3696
3697 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3698
3699 hci_key_change_cfm(conn, ev->status);
3700 }
3701
3702 hci_dev_unlock(hdev);
3703 }
3704
hci_remote_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3705 static void hci_remote_features_evt(struct hci_dev *hdev, void *data,
3706 struct sk_buff *skb)
3707 {
3708 struct hci_ev_remote_features *ev = data;
3709 struct hci_conn *conn;
3710
3711 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3712
3713 hci_dev_lock(hdev);
3714
3715 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3716 if (!conn)
3717 goto unlock;
3718
3719 if (!ev->status)
3720 memcpy(conn->features[0], ev->features, 8);
3721
3722 if (conn->state != BT_CONFIG)
3723 goto unlock;
3724
3725 if (!ev->status && lmp_ext_feat_capable(hdev) &&
3726 lmp_ext_feat_capable(conn)) {
3727 struct hci_cp_read_remote_ext_features cp;
3728 cp.handle = ev->handle;
3729 cp.page = 0x01;
3730 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
3731 sizeof(cp), &cp);
3732 goto unlock;
3733 }
3734
3735 if (!ev->status) {
3736 struct hci_cp_remote_name_req cp;
3737 memset(&cp, 0, sizeof(cp));
3738 bacpy(&cp.bdaddr, &conn->dst);
3739 cp.pscan_rep_mode = 0x02;
3740 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
3741 } else {
3742 mgmt_device_connected(hdev, conn, NULL, 0);
3743 }
3744
3745 if (!hci_outgoing_auth_needed(hdev, conn)) {
3746 conn->state = BT_CONNECTED;
3747 hci_connect_cfm(conn, ev->status);
3748 hci_conn_drop(conn);
3749 }
3750
3751 unlock:
3752 hci_dev_unlock(hdev);
3753 }
3754
handle_cmd_cnt_and_timer(struct hci_dev * hdev,u8 ncmd)3755 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd)
3756 {
3757 cancel_delayed_work(&hdev->cmd_timer);
3758
3759 rcu_read_lock();
3760 if (!test_bit(HCI_RESET, &hdev->flags)) {
3761 if (ncmd) {
3762 cancel_delayed_work(&hdev->ncmd_timer);
3763 atomic_set(&hdev->cmd_cnt, 1);
3764 } else {
3765 if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
3766 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer,
3767 HCI_NCMD_TIMEOUT);
3768 }
3769 }
3770 rcu_read_unlock();
3771 }
3772
hci_cc_le_read_buffer_size_v2(struct hci_dev * hdev,void * data,struct sk_buff * skb)3773 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data,
3774 struct sk_buff *skb)
3775 {
3776 struct hci_rp_le_read_buffer_size_v2 *rp = data;
3777
3778 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3779
3780 if (rp->status)
3781 return rp->status;
3782
3783 hdev->le_mtu = __le16_to_cpu(rp->acl_mtu);
3784 hdev->le_pkts = rp->acl_max_pkt;
3785 hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu);
3786 hdev->iso_pkts = rp->iso_max_pkt;
3787
3788 hdev->le_cnt = hdev->le_pkts;
3789 hdev->iso_cnt = hdev->iso_pkts;
3790
3791 BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
3792 hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
3793
3794 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
3795 return HCI_ERROR_INVALID_PARAMETERS;
3796
3797 return rp->status;
3798 }
3799
hci_unbound_cis_failed(struct hci_dev * hdev,u8 cig,u8 status)3800 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status)
3801 {
3802 struct hci_conn *conn, *tmp;
3803
3804 lockdep_assert_held(&hdev->lock);
3805
3806 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
3807 if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY) ||
3808 conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig)
3809 continue;
3810
3811 if (HCI_CONN_HANDLE_UNSET(conn->handle))
3812 hci_conn_failed(conn, status);
3813 }
3814 }
3815
hci_cc_le_set_cig_params(struct hci_dev * hdev,void * data,struct sk_buff * skb)3816 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
3817 struct sk_buff *skb)
3818 {
3819 struct hci_rp_le_set_cig_params *rp = data;
3820 struct hci_cp_le_set_cig_params *cp;
3821 struct hci_conn *conn;
3822 u8 status = rp->status;
3823 bool pending = false;
3824 int i;
3825
3826 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3827
3828 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
3829 if (!rp->status && (!cp || rp->num_handles != cp->num_cis ||
3830 rp->cig_id != cp->cig_id)) {
3831 bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
3832 status = HCI_ERROR_UNSPECIFIED;
3833 }
3834
3835 hci_dev_lock(hdev);
3836
3837 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554
3838 *
3839 * If the Status return parameter is non-zero, then the state of the CIG
3840 * and its CIS configurations shall not be changed by the command. If
3841 * the CIG did not already exist, it shall not be created.
3842 */
3843 if (status) {
3844 /* Keep current configuration, fail only the unbound CIS */
3845 hci_unbound_cis_failed(hdev, rp->cig_id, status);
3846 goto unlock;
3847 }
3848
3849 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
3850 *
3851 * If the Status return parameter is zero, then the Controller shall
3852 * set the Connection_Handle arrayed return parameter to the connection
3853 * handle(s) corresponding to the CIS configurations specified in
3854 * the CIS_IDs command parameter, in the same order.
3855 */
3856 for (i = 0; i < rp->num_handles; ++i) {
3857 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
3858 cp->cis[i].cis_id);
3859 if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
3860 continue;
3861
3862 if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
3863 continue;
3864
3865 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i])))
3866 continue;
3867
3868 if (conn->state == BT_CONNECT)
3869 pending = true;
3870 }
3871
3872 unlock:
3873 if (pending)
3874 hci_le_create_cis_pending(hdev);
3875
3876 hci_dev_unlock(hdev);
3877
3878 return rp->status;
3879 }
3880
hci_cc_le_setup_iso_path(struct hci_dev * hdev,void * data,struct sk_buff * skb)3881 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data,
3882 struct sk_buff *skb)
3883 {
3884 struct hci_rp_le_setup_iso_path *rp = data;
3885 struct hci_cp_le_setup_iso_path *cp;
3886 struct hci_conn *conn;
3887
3888 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3889
3890 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH);
3891 if (!cp)
3892 return rp->status;
3893
3894 hci_dev_lock(hdev);
3895
3896 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
3897 if (!conn)
3898 goto unlock;
3899
3900 if (rp->status) {
3901 hci_connect_cfm(conn, rp->status);
3902 hci_conn_del(conn);
3903 goto unlock;
3904 }
3905
3906 switch (cp->direction) {
3907 /* Input (Host to Controller) */
3908 case 0x00:
3909 /* Only confirm connection if output only */
3910 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu)
3911 hci_connect_cfm(conn, rp->status);
3912 break;
3913 /* Output (Controller to Host) */
3914 case 0x01:
3915 /* Confirm connection since conn->iso_qos is always configured
3916 * last.
3917 */
3918 hci_connect_cfm(conn, rp->status);
3919
3920 /* Notify device connected in case it is a BIG Sync */
3921 if (!rp->status && test_bit(HCI_CONN_BIG_SYNC, &conn->flags))
3922 mgmt_device_connected(hdev, conn, NULL, 0);
3923
3924 break;
3925 }
3926
3927 unlock:
3928 hci_dev_unlock(hdev);
3929 return rp->status;
3930 }
3931
hci_cs_le_create_big(struct hci_dev * hdev,u8 status)3932 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status)
3933 {
3934 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3935 }
3936
hci_cc_set_per_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)3937 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data,
3938 struct sk_buff *skb)
3939 {
3940 struct hci_ev_status *rp = data;
3941 struct hci_cp_le_set_per_adv_params *cp;
3942
3943 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3944
3945 if (rp->status)
3946 return rp->status;
3947
3948 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS);
3949 if (!cp)
3950 return rp->status;
3951
3952 /* TODO: set the conn state */
3953 return rp->status;
3954 }
3955
hci_cc_le_set_per_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)3956 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data,
3957 struct sk_buff *skb)
3958 {
3959 struct hci_ev_status *rp = data;
3960 struct hci_cp_le_set_per_adv_enable *cp;
3961 struct adv_info *adv = NULL, *n;
3962 u8 per_adv_cnt = 0;
3963
3964 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3965
3966 if (rp->status)
3967 return rp->status;
3968
3969 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE);
3970 if (!cp)
3971 return rp->status;
3972
3973 hci_dev_lock(hdev);
3974
3975 adv = hci_find_adv_instance(hdev, cp->handle);
3976
3977 if (cp->enable) {
3978 hci_dev_set_flag(hdev, HCI_LE_PER_ADV);
3979
3980 if (adv)
3981 adv->enabled = true;
3982 } else {
3983 /* If just one instance was disabled check if there are
3984 * any other instance enabled before clearing HCI_LE_PER_ADV.
3985 * The current periodic adv instance will be marked as
3986 * disabled once extended advertising is also disabled.
3987 */
3988 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
3989 list) {
3990 if (adv->periodic && adv->enabled)
3991 per_adv_cnt++;
3992 }
3993
3994 if (per_adv_cnt > 1)
3995 goto unlock;
3996
3997 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV);
3998 }
3999
4000 unlock:
4001 hci_dev_unlock(hdev);
4002
4003 return rp->status;
4004 }
4005
4006 #define HCI_CC_VL(_op, _func, _min, _max) \
4007 { \
4008 .op = _op, \
4009 .func = _func, \
4010 .min_len = _min, \
4011 .max_len = _max, \
4012 }
4013
4014 #define HCI_CC(_op, _func, _len) \
4015 HCI_CC_VL(_op, _func, _len, _len)
4016
4017 #define HCI_CC_STATUS(_op, _func) \
4018 HCI_CC(_op, _func, sizeof(struct hci_ev_status))
4019
4020 static const struct hci_cc {
4021 u16 op;
4022 u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
4023 u16 min_len;
4024 u16 max_len;
4025 } hci_cc_table[] = {
4026 HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel),
4027 HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq),
4028 HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq),
4029 HCI_CC(HCI_OP_REMOTE_NAME_REQ_CANCEL, hci_cc_remote_name_req_cancel,
4030 sizeof(struct hci_rp_remote_name_req_cancel)),
4031 HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery,
4032 sizeof(struct hci_rp_role_discovery)),
4033 HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy,
4034 sizeof(struct hci_rp_read_link_policy)),
4035 HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy,
4036 sizeof(struct hci_rp_write_link_policy)),
4037 HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy,
4038 sizeof(struct hci_rp_read_def_link_policy)),
4039 HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY,
4040 hci_cc_write_def_link_policy),
4041 HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset),
4042 HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key,
4043 sizeof(struct hci_rp_read_stored_link_key)),
4044 HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key,
4045 sizeof(struct hci_rp_delete_stored_link_key)),
4046 HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name),
4047 HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name,
4048 sizeof(struct hci_rp_read_local_name)),
4049 HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable),
4050 HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
4051 HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable),
4052 HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter),
4053 HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev,
4054 sizeof(struct hci_rp_read_class_of_dev)),
4055 HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev),
4056 HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting,
4057 sizeof(struct hci_rp_read_voice_setting)),
4058 HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting),
4059 HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac,
4060 sizeof(struct hci_rp_read_num_supported_iac)),
4061 HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode),
4062 HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support),
4063 HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout,
4064 sizeof(struct hci_rp_read_auth_payload_to)),
4065 HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout,
4066 sizeof(struct hci_rp_write_auth_payload_to)),
4067 HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version,
4068 sizeof(struct hci_rp_read_local_version)),
4069 HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands,
4070 sizeof(struct hci_rp_read_local_commands)),
4071 HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features,
4072 sizeof(struct hci_rp_read_local_features)),
4073 HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features,
4074 sizeof(struct hci_rp_read_local_ext_features)),
4075 HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size,
4076 sizeof(struct hci_rp_read_buffer_size)),
4077 HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr,
4078 sizeof(struct hci_rp_read_bd_addr)),
4079 HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts,
4080 sizeof(struct hci_rp_read_local_pairing_opts)),
4081 HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity,
4082 sizeof(struct hci_rp_read_page_scan_activity)),
4083 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
4084 hci_cc_write_page_scan_activity),
4085 HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type,
4086 sizeof(struct hci_rp_read_page_scan_type)),
4087 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type),
4088 HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock,
4089 sizeof(struct hci_rp_read_clock)),
4090 HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size,
4091 sizeof(struct hci_rp_read_enc_key_size)),
4092 HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power,
4093 sizeof(struct hci_rp_read_inq_rsp_tx_power)),
4094 HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4095 hci_cc_read_def_err_data_reporting,
4096 sizeof(struct hci_rp_read_def_err_data_reporting)),
4097 HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4098 hci_cc_write_def_err_data_reporting),
4099 HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply,
4100 sizeof(struct hci_rp_pin_code_reply)),
4101 HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply,
4102 sizeof(struct hci_rp_pin_code_neg_reply)),
4103 HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data,
4104 sizeof(struct hci_rp_read_local_oob_data)),
4105 HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data,
4106 sizeof(struct hci_rp_read_local_oob_ext_data)),
4107 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size,
4108 sizeof(struct hci_rp_le_read_buffer_size)),
4109 HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features,
4110 sizeof(struct hci_rp_le_read_local_features)),
4111 HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power,
4112 sizeof(struct hci_rp_le_read_adv_tx_power)),
4113 HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply,
4114 sizeof(struct hci_rp_user_confirm_reply)),
4115 HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply,
4116 sizeof(struct hci_rp_user_confirm_reply)),
4117 HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply,
4118 sizeof(struct hci_rp_user_confirm_reply)),
4119 HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply,
4120 sizeof(struct hci_rp_user_confirm_reply)),
4121 HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr),
4122 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable),
4123 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param),
4124 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable),
4125 HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4126 hci_cc_le_read_accept_list_size,
4127 sizeof(struct hci_rp_le_read_accept_list_size)),
4128 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list),
4129 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST,
4130 hci_cc_le_add_to_accept_list),
4131 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
4132 hci_cc_le_del_from_accept_list),
4133 HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states,
4134 sizeof(struct hci_rp_le_read_supported_states)),
4135 HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len,
4136 sizeof(struct hci_rp_le_read_def_data_len)),
4137 HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN,
4138 hci_cc_le_write_def_data_len),
4139 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST,
4140 hci_cc_le_add_to_resolv_list),
4141 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST,
4142 hci_cc_le_del_from_resolv_list),
4143 HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST,
4144 hci_cc_le_clear_resolv_list),
4145 HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size,
4146 sizeof(struct hci_rp_le_read_resolv_list_size)),
4147 HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
4148 hci_cc_le_set_addr_resolution_enable),
4149 HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len,
4150 sizeof(struct hci_rp_le_read_max_data_len)),
4151 HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED,
4152 hci_cc_write_le_host_supported),
4153 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param),
4154 HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi,
4155 sizeof(struct hci_rp_read_rssi)),
4156 HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power,
4157 sizeof(struct hci_rp_read_tx_power)),
4158 HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode),
4159 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS,
4160 hci_cc_le_set_ext_scan_param),
4161 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE,
4162 hci_cc_le_set_ext_scan_enable),
4163 HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy),
4164 HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4165 hci_cc_le_read_num_adv_sets,
4166 sizeof(struct hci_rp_le_read_num_supported_adv_sets)),
4167 HCI_CC(HCI_OP_LE_SET_EXT_ADV_PARAMS, hci_cc_set_ext_adv_param,
4168 sizeof(struct hci_rp_le_set_ext_adv_params)),
4169 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE,
4170 hci_cc_le_set_ext_adv_enable),
4171 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
4172 hci_cc_le_set_adv_set_random_addr),
4173 HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set),
4174 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets),
4175 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param),
4176 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE,
4177 hci_cc_le_set_per_adv_enable),
4178 HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power,
4179 sizeof(struct hci_rp_le_read_transmit_power)),
4180 HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode),
4181 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2,
4182 sizeof(struct hci_rp_le_read_buffer_size_v2)),
4183 HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params,
4184 sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE),
4185 HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path,
4186 sizeof(struct hci_rp_le_setup_iso_path)),
4187 };
4188
hci_cc_func(struct hci_dev * hdev,const struct hci_cc * cc,struct sk_buff * skb)4189 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc,
4190 struct sk_buff *skb)
4191 {
4192 void *data;
4193
4194 if (skb->len < cc->min_len) {
4195 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u",
4196 cc->op, skb->len, cc->min_len);
4197 return HCI_ERROR_UNSPECIFIED;
4198 }
4199
4200 /* Just warn if the length is over max_len size it still be possible to
4201 * partially parse the cc so leave to callback to decide if that is
4202 * acceptable.
4203 */
4204 if (skb->len > cc->max_len)
4205 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u",
4206 cc->op, skb->len, cc->max_len);
4207
4208 data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len);
4209 if (!data)
4210 return HCI_ERROR_UNSPECIFIED;
4211
4212 return cc->func(hdev, data, skb);
4213 }
4214
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)4215 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
4216 struct sk_buff *skb, u16 *opcode, u8 *status,
4217 hci_req_complete_t *req_complete,
4218 hci_req_complete_skb_t *req_complete_skb)
4219 {
4220 struct hci_ev_cmd_complete *ev = data;
4221 int i;
4222
4223 *opcode = __le16_to_cpu(ev->opcode);
4224
4225 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4226
4227 for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) {
4228 if (hci_cc_table[i].op == *opcode) {
4229 *status = hci_cc_func(hdev, &hci_cc_table[i], skb);
4230 break;
4231 }
4232 }
4233
4234 if (i == ARRAY_SIZE(hci_cc_table)) {
4235 /* Unknown opcode, assume byte 0 contains the status, so
4236 * that e.g. __hci_cmd_sync() properly returns errors
4237 * for vendor specific commands send by HCI drivers.
4238 * If a vendor doesn't actually follow this convention we may
4239 * need to introduce a vendor CC table in order to properly set
4240 * the status.
4241 */
4242 *status = skb->data[0];
4243 }
4244
4245 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4246
4247 hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
4248 req_complete_skb);
4249
4250 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4251 bt_dev_err(hdev,
4252 "unexpected event for opcode 0x%4.4x", *opcode);
4253 return;
4254 }
4255
4256 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4257 queue_work(hdev->workqueue, &hdev->cmd_work);
4258 }
4259
hci_cs_le_create_cis(struct hci_dev * hdev,u8 status)4260 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
4261 {
4262 struct hci_cp_le_create_cis *cp;
4263 bool pending = false;
4264 int i;
4265
4266 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4267
4268 if (!status)
4269 return;
4270
4271 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
4272 if (!cp)
4273 return;
4274
4275 hci_dev_lock(hdev);
4276
4277 /* Remove connection if command failed */
4278 for (i = 0; i < cp->num_cis; i++) {
4279 struct hci_conn *conn;
4280 u16 handle;
4281
4282 handle = __le16_to_cpu(cp->cis[i].cis_handle);
4283
4284 conn = hci_conn_hash_lookup_handle(hdev, handle);
4285 if (conn) {
4286 if (test_and_clear_bit(HCI_CONN_CREATE_CIS,
4287 &conn->flags))
4288 pending = true;
4289 conn->state = BT_CLOSED;
4290 hci_connect_cfm(conn, status);
4291 hci_conn_del(conn);
4292 }
4293 }
4294 cp->num_cis = 0;
4295
4296 if (pending)
4297 hci_le_create_cis_pending(hdev);
4298
4299 hci_dev_unlock(hdev);
4300 }
4301
4302 #define HCI_CS(_op, _func) \
4303 { \
4304 .op = _op, \
4305 .func = _func, \
4306 }
4307
4308 static const struct hci_cs {
4309 u16 op;
4310 void (*func)(struct hci_dev *hdev, __u8 status);
4311 } hci_cs_table[] = {
4312 HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry),
4313 HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn),
4314 HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect),
4315 HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco),
4316 HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested),
4317 HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt),
4318 HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req),
4319 HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features),
4320 HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES,
4321 hci_cs_read_remote_ext_features),
4322 HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn),
4323 HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN,
4324 hci_cs_enhanced_setup_sync_conn),
4325 HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode),
4326 HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode),
4327 HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role),
4328 HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn),
4329 HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features),
4330 HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc),
4331 HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn),
4332 HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis),
4333 HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big),
4334 };
4335
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)4336 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data,
4337 struct sk_buff *skb, u16 *opcode, u8 *status,
4338 hci_req_complete_t *req_complete,
4339 hci_req_complete_skb_t *req_complete_skb)
4340 {
4341 struct hci_ev_cmd_status *ev = data;
4342 int i;
4343
4344 *opcode = __le16_to_cpu(ev->opcode);
4345 *status = ev->status;
4346
4347 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4348
4349 for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) {
4350 if (hci_cs_table[i].op == *opcode) {
4351 hci_cs_table[i].func(hdev, ev->status);
4352 break;
4353 }
4354 }
4355
4356 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4357
4358 /* Indicate request completion if the command failed. Also, if
4359 * we're not waiting for a special event and we get a success
4360 * command status we should try to flag the request as completed
4361 * (since for this kind of commands there will not be a command
4362 * complete event).
4363 */
4364 if (ev->status || (hdev->req_skb && !hci_skb_event(hdev->req_skb))) {
4365 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
4366 req_complete_skb);
4367 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4368 bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x",
4369 *opcode);
4370 return;
4371 }
4372 }
4373
4374 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4375 queue_work(hdev->workqueue, &hdev->cmd_work);
4376 }
4377
hci_hardware_error_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4378 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data,
4379 struct sk_buff *skb)
4380 {
4381 struct hci_ev_hardware_error *ev = data;
4382
4383 bt_dev_dbg(hdev, "code 0x%2.2x", ev->code);
4384
4385 hdev->hw_error_code = ev->code;
4386
4387 queue_work(hdev->req_workqueue, &hdev->error_reset);
4388 }
4389
hci_role_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4390 static void hci_role_change_evt(struct hci_dev *hdev, void *data,
4391 struct sk_buff *skb)
4392 {
4393 struct hci_ev_role_change *ev = data;
4394 struct hci_conn *conn;
4395
4396 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4397
4398 hci_dev_lock(hdev);
4399
4400 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4401 if (conn) {
4402 if (!ev->status)
4403 conn->role = ev->role;
4404
4405 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
4406
4407 hci_role_switch_cfm(conn, ev->status, ev->role);
4408 }
4409
4410 hci_dev_unlock(hdev);
4411 }
4412
hci_num_comp_pkts_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4413 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data,
4414 struct sk_buff *skb)
4415 {
4416 struct hci_ev_num_comp_pkts *ev = data;
4417 int i;
4418
4419 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS,
4420 flex_array_size(ev, handles, ev->num)))
4421 return;
4422
4423 bt_dev_dbg(hdev, "num %d", ev->num);
4424
4425 for (i = 0; i < ev->num; i++) {
4426 struct hci_comp_pkts_info *info = &ev->handles[i];
4427 struct hci_conn *conn;
4428 __u16 handle, count;
4429 unsigned int i;
4430
4431 handle = __le16_to_cpu(info->handle);
4432 count = __le16_to_cpu(info->count);
4433
4434 conn = hci_conn_hash_lookup_handle(hdev, handle);
4435 if (!conn)
4436 continue;
4437
4438 conn->sent -= count;
4439
4440 for (i = 0; i < count; ++i)
4441 hci_conn_tx_dequeue(conn);
4442
4443 switch (conn->type) {
4444 case ACL_LINK:
4445 hdev->acl_cnt += count;
4446 if (hdev->acl_cnt > hdev->acl_pkts)
4447 hdev->acl_cnt = hdev->acl_pkts;
4448 break;
4449
4450 case LE_LINK:
4451 if (hdev->le_pkts) {
4452 hdev->le_cnt += count;
4453 if (hdev->le_cnt > hdev->le_pkts)
4454 hdev->le_cnt = hdev->le_pkts;
4455 } else {
4456 hdev->acl_cnt += count;
4457 if (hdev->acl_cnt > hdev->acl_pkts)
4458 hdev->acl_cnt = hdev->acl_pkts;
4459 }
4460 break;
4461
4462 case SCO_LINK:
4463 case ESCO_LINK:
4464 hdev->sco_cnt += count;
4465 if (hdev->sco_cnt > hdev->sco_pkts)
4466 hdev->sco_cnt = hdev->sco_pkts;
4467
4468 break;
4469
4470 case ISO_LINK:
4471 if (hdev->iso_pkts) {
4472 hdev->iso_cnt += count;
4473 if (hdev->iso_cnt > hdev->iso_pkts)
4474 hdev->iso_cnt = hdev->iso_pkts;
4475 } else if (hdev->le_pkts) {
4476 hdev->le_cnt += count;
4477 if (hdev->le_cnt > hdev->le_pkts)
4478 hdev->le_cnt = hdev->le_pkts;
4479 } else {
4480 hdev->acl_cnt += count;
4481 if (hdev->acl_cnt > hdev->acl_pkts)
4482 hdev->acl_cnt = hdev->acl_pkts;
4483 }
4484 break;
4485
4486 default:
4487 bt_dev_err(hdev, "unknown type %d conn %p",
4488 conn->type, conn);
4489 break;
4490 }
4491 }
4492
4493 queue_work(hdev->workqueue, &hdev->tx_work);
4494 }
4495
hci_mode_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4496 static void hci_mode_change_evt(struct hci_dev *hdev, void *data,
4497 struct sk_buff *skb)
4498 {
4499 struct hci_ev_mode_change *ev = data;
4500 struct hci_conn *conn;
4501
4502 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4503
4504 hci_dev_lock(hdev);
4505
4506 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4507 if (conn) {
4508 conn->mode = ev->mode;
4509
4510 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
4511 &conn->flags)) {
4512 if (conn->mode == HCI_CM_ACTIVE)
4513 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4514 else
4515 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4516 }
4517
4518 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
4519 hci_sco_setup(conn, ev->status);
4520 }
4521
4522 hci_dev_unlock(hdev);
4523 }
4524
hci_pin_code_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4525 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data,
4526 struct sk_buff *skb)
4527 {
4528 struct hci_ev_pin_code_req *ev = data;
4529 struct hci_conn *conn;
4530
4531 bt_dev_dbg(hdev, "");
4532
4533 hci_dev_lock(hdev);
4534
4535 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4536 if (!conn)
4537 goto unlock;
4538
4539 if (conn->state == BT_CONNECTED) {
4540 hci_conn_hold(conn);
4541 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
4542 hci_conn_drop(conn);
4543 }
4544
4545 if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
4546 !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
4547 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
4548 sizeof(ev->bdaddr), &ev->bdaddr);
4549 } else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4550 u8 secure;
4551
4552 if (conn->pending_sec_level == BT_SECURITY_HIGH)
4553 secure = 1;
4554 else
4555 secure = 0;
4556
4557 mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
4558 }
4559
4560 unlock:
4561 hci_dev_unlock(hdev);
4562 }
4563
conn_set_key(struct hci_conn * conn,u8 key_type,u8 pin_len)4564 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
4565 {
4566 if (key_type == HCI_LK_CHANGED_COMBINATION)
4567 return;
4568
4569 conn->pin_length = pin_len;
4570 conn->key_type = key_type;
4571
4572 switch (key_type) {
4573 case HCI_LK_LOCAL_UNIT:
4574 case HCI_LK_REMOTE_UNIT:
4575 case HCI_LK_DEBUG_COMBINATION:
4576 return;
4577 case HCI_LK_COMBINATION:
4578 if (pin_len == 16)
4579 conn->pending_sec_level = BT_SECURITY_HIGH;
4580 else
4581 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4582 break;
4583 case HCI_LK_UNAUTH_COMBINATION_P192:
4584 case HCI_LK_UNAUTH_COMBINATION_P256:
4585 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4586 break;
4587 case HCI_LK_AUTH_COMBINATION_P192:
4588 conn->pending_sec_level = BT_SECURITY_HIGH;
4589 break;
4590 case HCI_LK_AUTH_COMBINATION_P256:
4591 conn->pending_sec_level = BT_SECURITY_FIPS;
4592 break;
4593 }
4594 }
4595
hci_link_key_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4596 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data,
4597 struct sk_buff *skb)
4598 {
4599 struct hci_ev_link_key_req *ev = data;
4600 struct hci_cp_link_key_reply cp;
4601 struct hci_conn *conn;
4602 struct link_key *key;
4603
4604 bt_dev_dbg(hdev, "");
4605
4606 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4607 return;
4608
4609 hci_dev_lock(hdev);
4610
4611 key = hci_find_link_key(hdev, &ev->bdaddr);
4612 if (!key) {
4613 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr);
4614 goto not_found;
4615 }
4616
4617 bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr);
4618
4619 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4620 if (conn) {
4621 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4622
4623 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
4624 key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
4625 conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
4626 bt_dev_dbg(hdev, "ignoring unauthenticated key");
4627 goto not_found;
4628 }
4629
4630 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
4631 (conn->pending_sec_level == BT_SECURITY_HIGH ||
4632 conn->pending_sec_level == BT_SECURITY_FIPS)) {
4633 bt_dev_dbg(hdev, "ignoring key unauthenticated for high security");
4634 goto not_found;
4635 }
4636
4637 conn_set_key(conn, key->type, key->pin_len);
4638 }
4639
4640 bacpy(&cp.bdaddr, &ev->bdaddr);
4641 memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
4642
4643 hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
4644
4645 hci_dev_unlock(hdev);
4646
4647 return;
4648
4649 not_found:
4650 hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
4651 hci_dev_unlock(hdev);
4652 }
4653
hci_link_key_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4654 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data,
4655 struct sk_buff *skb)
4656 {
4657 struct hci_ev_link_key_notify *ev = data;
4658 struct hci_conn *conn;
4659 struct link_key *key;
4660 bool persistent;
4661 u8 pin_len = 0;
4662
4663 bt_dev_dbg(hdev, "");
4664
4665 hci_dev_lock(hdev);
4666
4667 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4668 if (!conn)
4669 goto unlock;
4670
4671 /* Ignore NULL link key against CVE-2020-26555 */
4672 if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
4673 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
4674 &ev->bdaddr);
4675 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
4676 hci_conn_drop(conn);
4677 goto unlock;
4678 }
4679
4680 hci_conn_hold(conn);
4681 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
4682 hci_conn_drop(conn);
4683
4684 set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4685 conn_set_key(conn, ev->key_type, conn->pin_length);
4686
4687 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4688 goto unlock;
4689
4690 key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
4691 ev->key_type, pin_len, &persistent);
4692 if (!key)
4693 goto unlock;
4694
4695 /* Update connection information since adding the key will have
4696 * fixed up the type in the case of changed combination keys.
4697 */
4698 if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
4699 conn_set_key(conn, key->type, key->pin_len);
4700
4701 mgmt_new_link_key(hdev, key, persistent);
4702
4703 /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
4704 * is set. If it's not set simply remove the key from the kernel
4705 * list (we've still notified user space about it but with
4706 * store_hint being 0).
4707 */
4708 if (key->type == HCI_LK_DEBUG_COMBINATION &&
4709 !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
4710 list_del_rcu(&key->list);
4711 kfree_rcu(key, rcu);
4712 goto unlock;
4713 }
4714
4715 if (persistent)
4716 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4717 else
4718 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4719
4720 unlock:
4721 hci_dev_unlock(hdev);
4722 }
4723
hci_clock_offset_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4724 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data,
4725 struct sk_buff *skb)
4726 {
4727 struct hci_ev_clock_offset *ev = data;
4728 struct hci_conn *conn;
4729
4730 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4731
4732 hci_dev_lock(hdev);
4733
4734 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4735 if (conn && !ev->status) {
4736 struct inquiry_entry *ie;
4737
4738 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4739 if (ie) {
4740 ie->data.clock_offset = ev->clock_offset;
4741 ie->timestamp = jiffies;
4742 }
4743 }
4744
4745 hci_dev_unlock(hdev);
4746 }
4747
hci_pkt_type_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4748 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data,
4749 struct sk_buff *skb)
4750 {
4751 struct hci_ev_pkt_type_change *ev = data;
4752 struct hci_conn *conn;
4753
4754 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4755
4756 hci_dev_lock(hdev);
4757
4758 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4759 if (conn && !ev->status)
4760 conn->pkt_type = __le16_to_cpu(ev->pkt_type);
4761
4762 hci_dev_unlock(hdev);
4763 }
4764
hci_pscan_rep_mode_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4765 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data,
4766 struct sk_buff *skb)
4767 {
4768 struct hci_ev_pscan_rep_mode *ev = data;
4769 struct inquiry_entry *ie;
4770
4771 bt_dev_dbg(hdev, "");
4772
4773 hci_dev_lock(hdev);
4774
4775 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
4776 if (ie) {
4777 ie->data.pscan_rep_mode = ev->pscan_rep_mode;
4778 ie->timestamp = jiffies;
4779 }
4780
4781 hci_dev_unlock(hdev);
4782 }
4783
hci_inquiry_result_with_rssi_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)4784 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
4785 struct sk_buff *skb)
4786 {
4787 struct hci_ev_inquiry_result_rssi *ev = edata;
4788 struct inquiry_data data;
4789 int i;
4790
4791 bt_dev_dbg(hdev, "num_rsp %d", ev->num);
4792
4793 if (!ev->num)
4794 return;
4795
4796 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
4797 return;
4798
4799 hci_dev_lock(hdev);
4800
4801 if (skb->len == array_size(ev->num,
4802 sizeof(struct inquiry_info_rssi_pscan))) {
4803 struct inquiry_info_rssi_pscan *info;
4804
4805 for (i = 0; i < ev->num; i++) {
4806 u32 flags;
4807
4808 info = hci_ev_skb_pull(hdev, skb,
4809 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4810 sizeof(*info));
4811 if (!info) {
4812 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4813 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4814 goto unlock;
4815 }
4816
4817 bacpy(&data.bdaddr, &info->bdaddr);
4818 data.pscan_rep_mode = info->pscan_rep_mode;
4819 data.pscan_period_mode = info->pscan_period_mode;
4820 data.pscan_mode = info->pscan_mode;
4821 memcpy(data.dev_class, info->dev_class, 3);
4822 data.clock_offset = info->clock_offset;
4823 data.rssi = info->rssi;
4824 data.ssp_mode = 0x00;
4825
4826 flags = hci_inquiry_cache_update(hdev, &data, false);
4827
4828 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4829 info->dev_class, info->rssi,
4830 flags, NULL, 0, NULL, 0, 0);
4831 }
4832 } else if (skb->len == array_size(ev->num,
4833 sizeof(struct inquiry_info_rssi))) {
4834 struct inquiry_info_rssi *info;
4835
4836 for (i = 0; i < ev->num; i++) {
4837 u32 flags;
4838
4839 info = hci_ev_skb_pull(hdev, skb,
4840 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4841 sizeof(*info));
4842 if (!info) {
4843 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4844 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4845 goto unlock;
4846 }
4847
4848 bacpy(&data.bdaddr, &info->bdaddr);
4849 data.pscan_rep_mode = info->pscan_rep_mode;
4850 data.pscan_period_mode = info->pscan_period_mode;
4851 data.pscan_mode = 0x00;
4852 memcpy(data.dev_class, info->dev_class, 3);
4853 data.clock_offset = info->clock_offset;
4854 data.rssi = info->rssi;
4855 data.ssp_mode = 0x00;
4856
4857 flags = hci_inquiry_cache_update(hdev, &data, false);
4858
4859 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4860 info->dev_class, info->rssi,
4861 flags, NULL, 0, NULL, 0, 0);
4862 }
4863 } else {
4864 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4865 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4866 }
4867 unlock:
4868 hci_dev_unlock(hdev);
4869 }
4870
hci_remote_ext_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4871 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data,
4872 struct sk_buff *skb)
4873 {
4874 struct hci_ev_remote_ext_features *ev = data;
4875 struct hci_conn *conn;
4876
4877 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4878
4879 hci_dev_lock(hdev);
4880
4881 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4882 if (!conn)
4883 goto unlock;
4884
4885 if (ev->page < HCI_MAX_PAGES)
4886 memcpy(conn->features[ev->page], ev->features, 8);
4887
4888 if (!ev->status && ev->page == 0x01) {
4889 struct inquiry_entry *ie;
4890
4891 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4892 if (ie)
4893 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4894
4895 if (ev->features[0] & LMP_HOST_SSP) {
4896 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4897 } else {
4898 /* It is mandatory by the Bluetooth specification that
4899 * Extended Inquiry Results are only used when Secure
4900 * Simple Pairing is enabled, but some devices violate
4901 * this.
4902 *
4903 * To make these devices work, the internal SSP
4904 * enabled flag needs to be cleared if the remote host
4905 * features do not indicate SSP support */
4906 clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4907 }
4908
4909 if (ev->features[0] & LMP_HOST_SC)
4910 set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
4911 }
4912
4913 if (conn->state != BT_CONFIG)
4914 goto unlock;
4915
4916 if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
4917 struct hci_cp_remote_name_req cp;
4918 memset(&cp, 0, sizeof(cp));
4919 bacpy(&cp.bdaddr, &conn->dst);
4920 cp.pscan_rep_mode = 0x02;
4921 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
4922 } else {
4923 mgmt_device_connected(hdev, conn, NULL, 0);
4924 }
4925
4926 if (!hci_outgoing_auth_needed(hdev, conn)) {
4927 conn->state = BT_CONNECTED;
4928 hci_connect_cfm(conn, ev->status);
4929 hci_conn_drop(conn);
4930 }
4931
4932 unlock:
4933 hci_dev_unlock(hdev);
4934 }
4935
hci_sync_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4936 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
4937 struct sk_buff *skb)
4938 {
4939 struct hci_ev_sync_conn_complete *ev = data;
4940 struct hci_conn *conn;
4941 u8 status = ev->status;
4942
4943 switch (ev->link_type) {
4944 case SCO_LINK:
4945 case ESCO_LINK:
4946 break;
4947 default:
4948 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
4949 * for HCI_Synchronous_Connection_Complete is limited to
4950 * either SCO or eSCO
4951 */
4952 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
4953 return;
4954 }
4955
4956 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4957
4958 hci_dev_lock(hdev);
4959
4960 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
4961 if (!conn) {
4962 if (ev->link_type == ESCO_LINK)
4963 goto unlock;
4964
4965 /* When the link type in the event indicates SCO connection
4966 * and lookup of the connection object fails, then check
4967 * if an eSCO connection object exists.
4968 *
4969 * The core limits the synchronous connections to either
4970 * SCO or eSCO. The eSCO connection is preferred and tried
4971 * to be setup first and until successfully established,
4972 * the link type will be hinted as eSCO.
4973 */
4974 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
4975 if (!conn)
4976 goto unlock;
4977 }
4978
4979 /* The HCI_Synchronous_Connection_Complete event is only sent once per connection.
4980 * Processing it more than once per connection can corrupt kernel memory.
4981 *
4982 * As the connection handle is set here for the first time, it indicates
4983 * whether the connection is already set up.
4984 */
4985 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
4986 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection");
4987 goto unlock;
4988 }
4989
4990 switch (status) {
4991 case 0x00:
4992 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
4993 if (status) {
4994 conn->state = BT_CLOSED;
4995 break;
4996 }
4997
4998 conn->state = BT_CONNECTED;
4999 conn->type = ev->link_type;
5000
5001 hci_debugfs_create_conn(conn);
5002 hci_conn_add_sysfs(conn);
5003 break;
5004
5005 case 0x10: /* Connection Accept Timeout */
5006 case 0x0d: /* Connection Rejected due to Limited Resources */
5007 case 0x11: /* Unsupported Feature or Parameter Value */
5008 case 0x1c: /* SCO interval rejected */
5009 case 0x1a: /* Unsupported Remote Feature */
5010 case 0x1e: /* Invalid LMP Parameters */
5011 case 0x1f: /* Unspecified error */
5012 case 0x20: /* Unsupported LMP Parameter value */
5013 if (conn->out) {
5014 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
5015 (hdev->esco_type & EDR_ESCO_MASK);
5016 if (hci_setup_sync(conn, conn->parent->handle))
5017 goto unlock;
5018 }
5019 fallthrough;
5020
5021 default:
5022 conn->state = BT_CLOSED;
5023 break;
5024 }
5025
5026 bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode);
5027 /* Notify only in case of SCO over HCI transport data path which
5028 * is zero and non-zero value shall be non-HCI transport data path
5029 */
5030 if (conn->codec.data_path == 0 && hdev->notify) {
5031 switch (ev->air_mode) {
5032 case 0x02:
5033 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
5034 break;
5035 case 0x03:
5036 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP);
5037 break;
5038 }
5039 }
5040
5041 hci_connect_cfm(conn, status);
5042 if (status)
5043 hci_conn_del(conn);
5044
5045 unlock:
5046 hci_dev_unlock(hdev);
5047 }
5048
eir_get_length(u8 * eir,size_t eir_len)5049 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
5050 {
5051 size_t parsed = 0;
5052
5053 while (parsed < eir_len) {
5054 u8 field_len = eir[0];
5055
5056 if (field_len == 0)
5057 return parsed;
5058
5059 parsed += field_len + 1;
5060 eir += field_len + 1;
5061 }
5062
5063 return eir_len;
5064 }
5065
hci_extended_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5066 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata,
5067 struct sk_buff *skb)
5068 {
5069 struct hci_ev_ext_inquiry_result *ev = edata;
5070 struct inquiry_data data;
5071 size_t eir_len;
5072 int i;
5073
5074 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT,
5075 flex_array_size(ev, info, ev->num)))
5076 return;
5077
5078 bt_dev_dbg(hdev, "num %d", ev->num);
5079
5080 if (!ev->num)
5081 return;
5082
5083 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
5084 return;
5085
5086 hci_dev_lock(hdev);
5087
5088 for (i = 0; i < ev->num; i++) {
5089 struct extended_inquiry_info *info = &ev->info[i];
5090 u32 flags;
5091 bool name_known;
5092
5093 bacpy(&data.bdaddr, &info->bdaddr);
5094 data.pscan_rep_mode = info->pscan_rep_mode;
5095 data.pscan_period_mode = info->pscan_period_mode;
5096 data.pscan_mode = 0x00;
5097 memcpy(data.dev_class, info->dev_class, 3);
5098 data.clock_offset = info->clock_offset;
5099 data.rssi = info->rssi;
5100 data.ssp_mode = 0x01;
5101
5102 if (hci_dev_test_flag(hdev, HCI_MGMT))
5103 name_known = eir_get_data(info->data,
5104 sizeof(info->data),
5105 EIR_NAME_COMPLETE, NULL);
5106 else
5107 name_known = true;
5108
5109 flags = hci_inquiry_cache_update(hdev, &data, name_known);
5110
5111 eir_len = eir_get_length(info->data, sizeof(info->data));
5112
5113 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
5114 info->dev_class, info->rssi,
5115 flags, info->data, eir_len, NULL, 0, 0);
5116 }
5117
5118 hci_dev_unlock(hdev);
5119 }
5120
hci_key_refresh_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5121 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data,
5122 struct sk_buff *skb)
5123 {
5124 struct hci_ev_key_refresh_complete *ev = data;
5125 struct hci_conn *conn;
5126
5127 bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status,
5128 __le16_to_cpu(ev->handle));
5129
5130 hci_dev_lock(hdev);
5131
5132 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5133 if (!conn)
5134 goto unlock;
5135
5136 /* For BR/EDR the necessary steps are taken through the
5137 * auth_complete event.
5138 */
5139 if (conn->type != LE_LINK)
5140 goto unlock;
5141
5142 if (!ev->status)
5143 conn->sec_level = conn->pending_sec_level;
5144
5145 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
5146
5147 if (ev->status && conn->state == BT_CONNECTED) {
5148 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
5149 hci_conn_drop(conn);
5150 goto unlock;
5151 }
5152
5153 if (conn->state == BT_CONFIG) {
5154 if (!ev->status)
5155 conn->state = BT_CONNECTED;
5156
5157 hci_connect_cfm(conn, ev->status);
5158 hci_conn_drop(conn);
5159 } else {
5160 hci_auth_cfm(conn, ev->status);
5161
5162 hci_conn_hold(conn);
5163 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
5164 hci_conn_drop(conn);
5165 }
5166
5167 unlock:
5168 hci_dev_unlock(hdev);
5169 }
5170
hci_get_auth_req(struct hci_conn * conn)5171 static u8 hci_get_auth_req(struct hci_conn *conn)
5172 {
5173 /* If remote requests no-bonding follow that lead */
5174 if (conn->remote_auth == HCI_AT_NO_BONDING ||
5175 conn->remote_auth == HCI_AT_NO_BONDING_MITM)
5176 return conn->remote_auth | (conn->auth_type & 0x01);
5177
5178 /* If both remote and local have enough IO capabilities, require
5179 * MITM protection
5180 */
5181 if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
5182 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
5183 return conn->remote_auth | 0x01;
5184
5185 /* No MITM protection possible so ignore remote requirement */
5186 return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
5187 }
5188
bredr_oob_data_present(struct hci_conn * conn)5189 static u8 bredr_oob_data_present(struct hci_conn *conn)
5190 {
5191 struct hci_dev *hdev = conn->hdev;
5192 struct oob_data *data;
5193
5194 data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
5195 if (!data)
5196 return 0x00;
5197
5198 if (bredr_sc_enabled(hdev)) {
5199 /* When Secure Connections is enabled, then just
5200 * return the present value stored with the OOB
5201 * data. The stored value contains the right present
5202 * information. However it can only be trusted when
5203 * not in Secure Connection Only mode.
5204 */
5205 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
5206 return data->present;
5207
5208 /* When Secure Connections Only mode is enabled, then
5209 * the P-256 values are required. If they are not
5210 * available, then do not declare that OOB data is
5211 * present.
5212 */
5213 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
5214 !crypto_memneq(data->hash256, ZERO_KEY, 16))
5215 return 0x00;
5216
5217 return 0x02;
5218 }
5219
5220 /* When Secure Connections is not enabled or actually
5221 * not supported by the hardware, then check that if
5222 * P-192 data values are present.
5223 */
5224 if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
5225 !crypto_memneq(data->hash192, ZERO_KEY, 16))
5226 return 0x00;
5227
5228 return 0x01;
5229 }
5230
hci_io_capa_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5231 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data,
5232 struct sk_buff *skb)
5233 {
5234 struct hci_ev_io_capa_request *ev = data;
5235 struct hci_conn *conn;
5236
5237 bt_dev_dbg(hdev, "");
5238
5239 hci_dev_lock(hdev);
5240
5241 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5242 if (!conn || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
5243 goto unlock;
5244
5245 /* Assume remote supports SSP since it has triggered this event */
5246 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
5247
5248 hci_conn_hold(conn);
5249
5250 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5251 goto unlock;
5252
5253 /* Allow pairing if we're pairable, the initiators of the
5254 * pairing or if the remote is not requesting bonding.
5255 */
5256 if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
5257 test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
5258 (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
5259 struct hci_cp_io_capability_reply cp;
5260
5261 bacpy(&cp.bdaddr, &ev->bdaddr);
5262 /* Change the IO capability from KeyboardDisplay
5263 * to DisplayYesNo as it is not supported by BT spec. */
5264 cp.capability = (conn->io_capability == 0x04) ?
5265 HCI_IO_DISPLAY_YESNO : conn->io_capability;
5266
5267 /* If we are initiators, there is no remote information yet */
5268 if (conn->remote_auth == 0xff) {
5269 /* Request MITM protection if our IO caps allow it
5270 * except for the no-bonding case.
5271 */
5272 if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5273 conn->auth_type != HCI_AT_NO_BONDING)
5274 conn->auth_type |= 0x01;
5275 } else {
5276 conn->auth_type = hci_get_auth_req(conn);
5277 }
5278
5279 /* If we're not bondable, force one of the non-bondable
5280 * authentication requirement values.
5281 */
5282 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
5283 conn->auth_type &= HCI_AT_NO_BONDING_MITM;
5284
5285 cp.authentication = conn->auth_type;
5286 cp.oob_data = bredr_oob_data_present(conn);
5287
5288 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
5289 sizeof(cp), &cp);
5290 } else {
5291 struct hci_cp_io_capability_neg_reply cp;
5292
5293 bacpy(&cp.bdaddr, &ev->bdaddr);
5294 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
5295
5296 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
5297 sizeof(cp), &cp);
5298 }
5299
5300 unlock:
5301 hci_dev_unlock(hdev);
5302 }
5303
hci_io_capa_reply_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5304 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data,
5305 struct sk_buff *skb)
5306 {
5307 struct hci_ev_io_capa_reply *ev = data;
5308 struct hci_conn *conn;
5309
5310 bt_dev_dbg(hdev, "");
5311
5312 hci_dev_lock(hdev);
5313
5314 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5315 if (!conn)
5316 goto unlock;
5317
5318 conn->remote_cap = ev->capability;
5319 conn->remote_auth = ev->authentication;
5320
5321 unlock:
5322 hci_dev_unlock(hdev);
5323 }
5324
hci_user_confirm_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5325 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data,
5326 struct sk_buff *skb)
5327 {
5328 struct hci_ev_user_confirm_req *ev = data;
5329 int loc_mitm, rem_mitm, confirm_hint = 0;
5330 struct hci_conn *conn;
5331
5332 bt_dev_dbg(hdev, "");
5333
5334 hci_dev_lock(hdev);
5335
5336 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5337 goto unlock;
5338
5339 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5340 if (!conn)
5341 goto unlock;
5342
5343 loc_mitm = (conn->auth_type & 0x01);
5344 rem_mitm = (conn->remote_auth & 0x01);
5345
5346 /* If we require MITM but the remote device can't provide that
5347 * (it has NoInputNoOutput) then reject the confirmation
5348 * request. We check the security level here since it doesn't
5349 * necessarily match conn->auth_type.
5350 */
5351 if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
5352 conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
5353 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM");
5354 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
5355 sizeof(ev->bdaddr), &ev->bdaddr);
5356 goto unlock;
5357 }
5358
5359 /* If no side requires MITM protection; use JUST_CFM method */
5360 if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
5361 (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
5362
5363 /* If we're not the initiator of request authorization and the
5364 * local IO capability is not NoInputNoOutput, use JUST_WORKS
5365 * method (mgmt_user_confirm with confirm_hint set to 1).
5366 */
5367 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5368 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) {
5369 bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5370 confirm_hint = 1;
5371 goto confirm;
5372 }
5373
5374 /* If there already exists link key in local host, leave the
5375 * decision to user space since the remote device could be
5376 * legitimate or malicious.
5377 */
5378 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5379 bt_dev_dbg(hdev, "Local host already has link key");
5380 confirm_hint = 1;
5381 goto confirm;
5382 }
5383
5384 BT_DBG("Auto-accept of user confirmation with %ums delay",
5385 hdev->auto_accept_delay);
5386
5387 if (hdev->auto_accept_delay > 0) {
5388 int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5389 queue_delayed_work(conn->hdev->workqueue,
5390 &conn->auto_accept_work, delay);
5391 goto unlock;
5392 }
5393
5394 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5395 sizeof(ev->bdaddr), &ev->bdaddr);
5396 goto unlock;
5397 }
5398
5399 confirm:
5400 mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5401 le32_to_cpu(ev->passkey), confirm_hint);
5402
5403 unlock:
5404 hci_dev_unlock(hdev);
5405 }
5406
hci_user_passkey_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5407 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5408 struct sk_buff *skb)
5409 {
5410 struct hci_ev_user_passkey_req *ev = data;
5411
5412 bt_dev_dbg(hdev, "");
5413
5414 if (hci_dev_test_flag(hdev, HCI_MGMT))
5415 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5416 }
5417
hci_user_passkey_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5418 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5419 struct sk_buff *skb)
5420 {
5421 struct hci_ev_user_passkey_notify *ev = data;
5422 struct hci_conn *conn;
5423
5424 bt_dev_dbg(hdev, "");
5425
5426 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5427 if (!conn)
5428 return;
5429
5430 conn->passkey_notify = __le32_to_cpu(ev->passkey);
5431 conn->passkey_entered = 0;
5432
5433 if (hci_dev_test_flag(hdev, HCI_MGMT))
5434 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5435 conn->dst_type, conn->passkey_notify,
5436 conn->passkey_entered);
5437 }
5438
hci_keypress_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5439 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5440 struct sk_buff *skb)
5441 {
5442 struct hci_ev_keypress_notify *ev = data;
5443 struct hci_conn *conn;
5444
5445 bt_dev_dbg(hdev, "");
5446
5447 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5448 if (!conn)
5449 return;
5450
5451 switch (ev->type) {
5452 case HCI_KEYPRESS_STARTED:
5453 conn->passkey_entered = 0;
5454 return;
5455
5456 case HCI_KEYPRESS_ENTERED:
5457 conn->passkey_entered++;
5458 break;
5459
5460 case HCI_KEYPRESS_ERASED:
5461 conn->passkey_entered--;
5462 break;
5463
5464 case HCI_KEYPRESS_CLEARED:
5465 conn->passkey_entered = 0;
5466 break;
5467
5468 case HCI_KEYPRESS_COMPLETED:
5469 return;
5470 }
5471
5472 if (hci_dev_test_flag(hdev, HCI_MGMT))
5473 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5474 conn->dst_type, conn->passkey_notify,
5475 conn->passkey_entered);
5476 }
5477
hci_simple_pair_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5478 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5479 struct sk_buff *skb)
5480 {
5481 struct hci_ev_simple_pair_complete *ev = data;
5482 struct hci_conn *conn;
5483
5484 bt_dev_dbg(hdev, "");
5485
5486 hci_dev_lock(hdev);
5487
5488 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5489 if (!conn || !hci_conn_ssp_enabled(conn))
5490 goto unlock;
5491
5492 /* Reset the authentication requirement to unknown */
5493 conn->remote_auth = 0xff;
5494
5495 /* To avoid duplicate auth_failed events to user space we check
5496 * the HCI_CONN_AUTH_PEND flag which will be set if we
5497 * initiated the authentication. A traditional auth_complete
5498 * event gets always produced as initiator and is also mapped to
5499 * the mgmt_auth_failed event */
5500 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5501 mgmt_auth_failed(conn, ev->status);
5502
5503 hci_conn_drop(conn);
5504
5505 unlock:
5506 hci_dev_unlock(hdev);
5507 }
5508
hci_remote_host_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5509 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5510 struct sk_buff *skb)
5511 {
5512 struct hci_ev_remote_host_features *ev = data;
5513 struct inquiry_entry *ie;
5514 struct hci_conn *conn;
5515
5516 bt_dev_dbg(hdev, "");
5517
5518 hci_dev_lock(hdev);
5519
5520 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5521 if (conn)
5522 memcpy(conn->features[1], ev->features, 8);
5523
5524 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5525 if (ie)
5526 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5527
5528 hci_dev_unlock(hdev);
5529 }
5530
hci_remote_oob_data_request_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5531 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5532 struct sk_buff *skb)
5533 {
5534 struct hci_ev_remote_oob_data_request *ev = edata;
5535 struct oob_data *data;
5536
5537 bt_dev_dbg(hdev, "");
5538
5539 hci_dev_lock(hdev);
5540
5541 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5542 goto unlock;
5543
5544 data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5545 if (!data) {
5546 struct hci_cp_remote_oob_data_neg_reply cp;
5547
5548 bacpy(&cp.bdaddr, &ev->bdaddr);
5549 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5550 sizeof(cp), &cp);
5551 goto unlock;
5552 }
5553
5554 if (bredr_sc_enabled(hdev)) {
5555 struct hci_cp_remote_oob_ext_data_reply cp;
5556
5557 bacpy(&cp.bdaddr, &ev->bdaddr);
5558 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5559 memset(cp.hash192, 0, sizeof(cp.hash192));
5560 memset(cp.rand192, 0, sizeof(cp.rand192));
5561 } else {
5562 memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5563 memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5564 }
5565 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5566 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5567
5568 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5569 sizeof(cp), &cp);
5570 } else {
5571 struct hci_cp_remote_oob_data_reply cp;
5572
5573 bacpy(&cp.bdaddr, &ev->bdaddr);
5574 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5575 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5576
5577 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5578 sizeof(cp), &cp);
5579 }
5580
5581 unlock:
5582 hci_dev_unlock(hdev);
5583 }
5584
le_conn_update_addr(struct hci_conn * conn,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * local_rpa)5585 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5586 u8 bdaddr_type, bdaddr_t *local_rpa)
5587 {
5588 if (conn->out) {
5589 conn->dst_type = bdaddr_type;
5590 conn->resp_addr_type = bdaddr_type;
5591 bacpy(&conn->resp_addr, bdaddr);
5592
5593 /* Check if the controller has set a Local RPA then it must be
5594 * used instead or hdev->rpa.
5595 */
5596 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5597 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5598 bacpy(&conn->init_addr, local_rpa);
5599 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5600 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5601 bacpy(&conn->init_addr, &conn->hdev->rpa);
5602 } else {
5603 hci_copy_identity_address(conn->hdev, &conn->init_addr,
5604 &conn->init_addr_type);
5605 }
5606 } else {
5607 conn->resp_addr_type = conn->hdev->adv_addr_type;
5608 /* Check if the controller has set a Local RPA then it must be
5609 * used instead or hdev->rpa.
5610 */
5611 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5612 conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5613 bacpy(&conn->resp_addr, local_rpa);
5614 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5615 /* In case of ext adv, resp_addr will be updated in
5616 * Adv Terminated event.
5617 */
5618 if (!ext_adv_capable(conn->hdev))
5619 bacpy(&conn->resp_addr,
5620 &conn->hdev->random_addr);
5621 } else {
5622 bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5623 }
5624
5625 conn->init_addr_type = bdaddr_type;
5626 bacpy(&conn->init_addr, bdaddr);
5627
5628 /* For incoming connections, set the default minimum
5629 * and maximum connection interval. They will be used
5630 * to check if the parameters are in range and if not
5631 * trigger the connection update procedure.
5632 */
5633 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5634 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5635 }
5636 }
5637
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)5638 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5639 bdaddr_t *bdaddr, u8 bdaddr_type,
5640 bdaddr_t *local_rpa, u8 role, u16 handle,
5641 u16 interval, u16 latency,
5642 u16 supervision_timeout)
5643 {
5644 struct hci_conn_params *params;
5645 struct hci_conn *conn;
5646 struct smp_irk *irk;
5647 u8 addr_type;
5648
5649 hci_dev_lock(hdev);
5650
5651 /* All controllers implicitly stop advertising in the event of a
5652 * connection, so ensure that the state bit is cleared.
5653 */
5654 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5655
5656 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
5657 if (!conn) {
5658 /* In case of error status and there is no connection pending
5659 * just unlock as there is nothing to cleanup.
5660 */
5661 if (status)
5662 goto unlock;
5663
5664 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
5665 if (IS_ERR(conn)) {
5666 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
5667 goto unlock;
5668 }
5669
5670 conn->dst_type = bdaddr_type;
5671
5672 /* If we didn't have a hci_conn object previously
5673 * but we're in central role this must be something
5674 * initiated using an accept list. Since accept list based
5675 * connections are not "first class citizens" we don't
5676 * have full tracking of them. Therefore, we go ahead
5677 * with a "best effort" approach of determining the
5678 * initiator address based on the HCI_PRIVACY flag.
5679 */
5680 if (conn->out) {
5681 conn->resp_addr_type = bdaddr_type;
5682 bacpy(&conn->resp_addr, bdaddr);
5683 if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5684 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5685 bacpy(&conn->init_addr, &hdev->rpa);
5686 } else {
5687 hci_copy_identity_address(hdev,
5688 &conn->init_addr,
5689 &conn->init_addr_type);
5690 }
5691 }
5692 } else {
5693 cancel_delayed_work(&conn->le_conn_timeout);
5694 }
5695
5696 /* The HCI_LE_Connection_Complete event is only sent once per connection.
5697 * Processing it more than once per connection can corrupt kernel memory.
5698 *
5699 * As the connection handle is set here for the first time, it indicates
5700 * whether the connection is already set up.
5701 */
5702 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5703 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5704 goto unlock;
5705 }
5706
5707 le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5708
5709 /* Lookup the identity address from the stored connection
5710 * address and address type.
5711 *
5712 * When establishing connections to an identity address, the
5713 * connection procedure will store the resolvable random
5714 * address first. Now if it can be converted back into the
5715 * identity address, start using the identity address from
5716 * now on.
5717 */
5718 irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5719 if (irk) {
5720 bacpy(&conn->dst, &irk->bdaddr);
5721 conn->dst_type = irk->addr_type;
5722 }
5723
5724 conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5725
5726 /* All connection failure handling is taken care of by the
5727 * hci_conn_failed function which is triggered by the HCI
5728 * request completion callbacks used for connecting.
5729 */
5730 if (status || hci_conn_set_handle(conn, handle))
5731 goto unlock;
5732
5733 /* Drop the connection if it has been aborted */
5734 if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5735 hci_conn_drop(conn);
5736 goto unlock;
5737 }
5738
5739 if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5740 addr_type = BDADDR_LE_PUBLIC;
5741 else
5742 addr_type = BDADDR_LE_RANDOM;
5743
5744 /* Drop the connection if the device is blocked */
5745 if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5746 hci_conn_drop(conn);
5747 goto unlock;
5748 }
5749
5750 mgmt_device_connected(hdev, conn, NULL, 0);
5751
5752 conn->sec_level = BT_SECURITY_LOW;
5753 conn->state = BT_CONFIG;
5754
5755 /* Store current advertising instance as connection advertising instance
5756 * when sotfware rotation is in use so it can be re-enabled when
5757 * disconnected.
5758 */
5759 if (!ext_adv_capable(hdev))
5760 conn->adv_instance = hdev->cur_adv_instance;
5761
5762 conn->le_conn_interval = interval;
5763 conn->le_conn_latency = latency;
5764 conn->le_supv_timeout = supervision_timeout;
5765
5766 hci_debugfs_create_conn(conn);
5767 hci_conn_add_sysfs(conn);
5768
5769 /* The remote features procedure is defined for central
5770 * role only. So only in case of an initiated connection
5771 * request the remote features.
5772 *
5773 * If the local controller supports peripheral-initiated features
5774 * exchange, then requesting the remote features in peripheral
5775 * role is possible. Otherwise just transition into the
5776 * connected state without requesting the remote features.
5777 */
5778 if (conn->out ||
5779 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
5780 struct hci_cp_le_read_remote_features cp;
5781
5782 cp.handle = __cpu_to_le16(conn->handle);
5783
5784 hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
5785 sizeof(cp), &cp);
5786
5787 hci_conn_hold(conn);
5788 } else {
5789 conn->state = BT_CONNECTED;
5790 hci_connect_cfm(conn, status);
5791 }
5792
5793 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
5794 conn->dst_type);
5795 if (params) {
5796 hci_pend_le_list_del_init(params);
5797 if (params->conn) {
5798 hci_conn_drop(params->conn);
5799 hci_conn_put(params->conn);
5800 params->conn = NULL;
5801 }
5802 }
5803
5804 unlock:
5805 hci_update_passive_scan(hdev);
5806 hci_dev_unlock(hdev);
5807 }
5808
hci_le_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5809 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
5810 struct sk_buff *skb)
5811 {
5812 struct hci_ev_le_conn_complete *ev = data;
5813
5814 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5815
5816 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5817 NULL, ev->role, le16_to_cpu(ev->handle),
5818 le16_to_cpu(ev->interval),
5819 le16_to_cpu(ev->latency),
5820 le16_to_cpu(ev->supervision_timeout));
5821 }
5822
hci_le_enh_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5823 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
5824 struct sk_buff *skb)
5825 {
5826 struct hci_ev_le_enh_conn_complete *ev = data;
5827
5828 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5829
5830 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5831 &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
5832 le16_to_cpu(ev->interval),
5833 le16_to_cpu(ev->latency),
5834 le16_to_cpu(ev->supervision_timeout));
5835 }
5836
hci_le_ext_adv_term_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5837 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
5838 struct sk_buff *skb)
5839 {
5840 struct hci_evt_le_ext_adv_set_term *ev = data;
5841 struct hci_conn *conn;
5842 struct adv_info *adv, *n;
5843
5844 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5845
5846 /* The Bluetooth Core 5.3 specification clearly states that this event
5847 * shall not be sent when the Host disables the advertising set. So in
5848 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
5849 *
5850 * When the Host disables an advertising set, all cleanup is done via
5851 * its command callback and not needed to be duplicated here.
5852 */
5853 if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
5854 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
5855 return;
5856 }
5857
5858 hci_dev_lock(hdev);
5859
5860 adv = hci_find_adv_instance(hdev, ev->handle);
5861
5862 if (ev->status) {
5863 if (!adv)
5864 goto unlock;
5865
5866 /* Remove advertising as it has been terminated */
5867 hci_remove_adv_instance(hdev, ev->handle);
5868 mgmt_advertising_removed(NULL, hdev, ev->handle);
5869
5870 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
5871 if (adv->enabled)
5872 goto unlock;
5873 }
5874
5875 /* We are no longer advertising, clear HCI_LE_ADV */
5876 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5877 goto unlock;
5878 }
5879
5880 if (adv)
5881 adv->enabled = false;
5882
5883 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
5884 if (conn) {
5885 /* Store handle in the connection so the correct advertising
5886 * instance can be re-enabled when disconnected.
5887 */
5888 conn->adv_instance = ev->handle;
5889
5890 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
5891 bacmp(&conn->resp_addr, BDADDR_ANY))
5892 goto unlock;
5893
5894 if (!ev->handle) {
5895 bacpy(&conn->resp_addr, &hdev->random_addr);
5896 goto unlock;
5897 }
5898
5899 if (adv)
5900 bacpy(&conn->resp_addr, &adv->random_addr);
5901 }
5902
5903 unlock:
5904 hci_dev_unlock(hdev);
5905 }
5906
hci_le_conn_update_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5907 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
5908 struct sk_buff *skb)
5909 {
5910 struct hci_ev_le_conn_update_complete *ev = data;
5911 struct hci_conn *conn;
5912
5913 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5914
5915 if (ev->status)
5916 return;
5917
5918 hci_dev_lock(hdev);
5919
5920 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5921 if (conn) {
5922 conn->le_conn_interval = le16_to_cpu(ev->interval);
5923 conn->le_conn_latency = le16_to_cpu(ev->latency);
5924 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
5925 }
5926
5927 hci_dev_unlock(hdev);
5928 }
5929
5930 /* 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)5931 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
5932 bdaddr_t *addr,
5933 u8 addr_type, bool addr_resolved,
5934 u8 adv_type, u8 phy, u8 sec_phy)
5935 {
5936 struct hci_conn *conn;
5937 struct hci_conn_params *params;
5938
5939 /* If the event is not connectable don't proceed further */
5940 if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
5941 return NULL;
5942
5943 /* Ignore if the device is blocked or hdev is suspended */
5944 if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
5945 hdev->suspended)
5946 return NULL;
5947
5948 /* Most controller will fail if we try to create new connections
5949 * while we have an existing one in peripheral role.
5950 */
5951 if (hdev->conn_hash.le_num_peripheral > 0 &&
5952 (test_bit(HCI_QUIRK_BROKEN_LE_STATES, &hdev->quirks) ||
5953 !(hdev->le_states[3] & 0x10)))
5954 return NULL;
5955
5956 /* If we're not connectable only connect devices that we have in
5957 * our pend_le_conns list.
5958 */
5959 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
5960 addr_type);
5961 if (!params)
5962 return NULL;
5963
5964 if (!params->explicit_connect) {
5965 switch (params->auto_connect) {
5966 case HCI_AUTO_CONN_DIRECT:
5967 /* Only devices advertising with ADV_DIRECT_IND are
5968 * triggering a connection attempt. This is allowing
5969 * incoming connections from peripheral devices.
5970 */
5971 if (adv_type != LE_ADV_DIRECT_IND)
5972 return NULL;
5973 break;
5974 case HCI_AUTO_CONN_ALWAYS:
5975 /* Devices advertising with ADV_IND or ADV_DIRECT_IND
5976 * are triggering a connection attempt. This means
5977 * that incoming connections from peripheral device are
5978 * accepted and also outgoing connections to peripheral
5979 * devices are established when found.
5980 */
5981 break;
5982 default:
5983 return NULL;
5984 }
5985 }
5986
5987 conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
5988 BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
5989 HCI_ROLE_MASTER, phy, sec_phy);
5990 if (!IS_ERR(conn)) {
5991 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
5992 * by higher layer that tried to connect, if no then
5993 * store the pointer since we don't really have any
5994 * other owner of the object besides the params that
5995 * triggered it. This way we can abort the connection if
5996 * the parameters get removed and keep the reference
5997 * count consistent once the connection is established.
5998 */
5999
6000 if (!params->explicit_connect)
6001 params->conn = hci_conn_get(conn);
6002
6003 return conn;
6004 }
6005
6006 switch (PTR_ERR(conn)) {
6007 case -EBUSY:
6008 /* If hci_connect() returns -EBUSY it means there is already
6009 * an LE connection attempt going on. Since controllers don't
6010 * support more than one connection attempt at the time, we
6011 * don't consider this an error case.
6012 */
6013 break;
6014 default:
6015 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
6016 return NULL;
6017 }
6018
6019 return NULL;
6020 }
6021
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)6022 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
6023 u8 bdaddr_type, bdaddr_t *direct_addr,
6024 u8 direct_addr_type, u8 phy, u8 sec_phy, s8 rssi,
6025 u8 *data, u8 len, bool ext_adv, bool ctl_time,
6026 u64 instant)
6027 {
6028 struct discovery_state *d = &hdev->discovery;
6029 struct smp_irk *irk;
6030 struct hci_conn *conn;
6031 bool match, bdaddr_resolved;
6032 u32 flags;
6033 u8 *ptr;
6034
6035 switch (type) {
6036 case LE_ADV_IND:
6037 case LE_ADV_DIRECT_IND:
6038 case LE_ADV_SCAN_IND:
6039 case LE_ADV_NONCONN_IND:
6040 case LE_ADV_SCAN_RSP:
6041 break;
6042 default:
6043 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6044 "type: 0x%02x", type);
6045 return;
6046 }
6047
6048 if (len > max_adv_len(hdev)) {
6049 bt_dev_err_ratelimited(hdev,
6050 "adv larger than maximum supported");
6051 return;
6052 }
6053
6054 /* Find the end of the data in case the report contains padded zero
6055 * bytes at the end causing an invalid length value.
6056 *
6057 * When data is NULL, len is 0 so there is no need for extra ptr
6058 * check as 'ptr < data + 0' is already false in such case.
6059 */
6060 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6061 if (ptr + 1 + *ptr > data + len)
6062 break;
6063 }
6064
6065 /* Adjust for actual length. This handles the case when remote
6066 * device is advertising with incorrect data length.
6067 */
6068 len = ptr - data;
6069
6070 /* If the direct address is present, then this report is from
6071 * a LE Direct Advertising Report event. In that case it is
6072 * important to see if the address is matching the local
6073 * controller address.
6074 *
6075 * If local privacy is not enable the controller shall not be
6076 * generating such event since according to its documentation it is only
6077 * valid for filter_policy 0x02 and 0x03, but the fact that it did
6078 * generate LE Direct Advertising Report means it is probably broken and
6079 * won't generate any other event which can potentially break
6080 * auto-connect logic so in case local privacy is not enable this
6081 * ignores the direct_addr so it works as a regular report.
6082 */
6083 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr &&
6084 hci_dev_test_flag(hdev, HCI_PRIVACY)) {
6085 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6086 &bdaddr_resolved);
6087
6088 /* Only resolvable random addresses are valid for these
6089 * kind of reports and others can be ignored.
6090 */
6091 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6092 return;
6093
6094 /* If the local IRK of the controller does not match
6095 * with the resolvable random address provided, then
6096 * this report can be ignored.
6097 */
6098 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6099 return;
6100 }
6101
6102 /* Check if we need to convert to identity address */
6103 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6104 if (irk) {
6105 bdaddr = &irk->bdaddr;
6106 bdaddr_type = irk->addr_type;
6107 }
6108
6109 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6110
6111 /* Check if we have been requested to connect to this device.
6112 *
6113 * direct_addr is set only for directed advertising reports (it is NULL
6114 * for advertising reports) and is already verified to be RPA above.
6115 */
6116 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6117 type, phy, sec_phy);
6118 if (!ext_adv && conn && type == LE_ADV_IND &&
6119 len <= max_adv_len(hdev)) {
6120 /* Store report for later inclusion by
6121 * mgmt_device_connected
6122 */
6123 memcpy(conn->le_adv_data, data, len);
6124 conn->le_adv_data_len = len;
6125 }
6126
6127 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6128 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6129 else
6130 flags = 0;
6131
6132 /* All scan results should be sent up for Mesh systems */
6133 if (hci_dev_test_flag(hdev, HCI_MESH)) {
6134 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6135 rssi, flags, data, len, NULL, 0, instant);
6136 return;
6137 }
6138
6139 /* Passive scanning shouldn't trigger any device found events,
6140 * except for devices marked as CONN_REPORT for which we do send
6141 * device found events, or advertisement monitoring requested.
6142 */
6143 if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6144 if (type == LE_ADV_DIRECT_IND)
6145 return;
6146
6147 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6148 bdaddr, bdaddr_type) &&
6149 idr_is_empty(&hdev->adv_monitors_idr))
6150 return;
6151
6152 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6153 rssi, flags, data, len, NULL, 0, 0);
6154 return;
6155 }
6156
6157 /* When receiving a scan response, then there is no way to
6158 * know if the remote device is connectable or not. However
6159 * since scan responses are merged with a previously seen
6160 * advertising report, the flags field from that report
6161 * will be used.
6162 *
6163 * In the unlikely case that a controller just sends a scan
6164 * response event that doesn't match the pending report, then
6165 * it is marked as a standalone SCAN_RSP.
6166 */
6167 if (type == LE_ADV_SCAN_RSP)
6168 flags = MGMT_DEV_FOUND_SCAN_RSP;
6169
6170 /* If there's nothing pending either store the data from this
6171 * event or send an immediate device found event if the data
6172 * should not be stored for later.
6173 */
6174 if (!has_pending_adv_report(hdev)) {
6175 /* If the report will trigger a SCAN_REQ store it for
6176 * later merging.
6177 */
6178 if (!ext_adv && (type == LE_ADV_IND ||
6179 type == LE_ADV_SCAN_IND)) {
6180 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6181 rssi, flags, data, len);
6182 return;
6183 }
6184
6185 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6186 rssi, flags, data, len, NULL, 0, 0);
6187 return;
6188 }
6189
6190 /* Check if the pending report is for the same device as the new one */
6191 match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6192 bdaddr_type == d->last_adv_addr_type);
6193
6194 /* If the pending data doesn't match this report or this isn't a
6195 * scan response (e.g. we got a duplicate ADV_IND) then force
6196 * sending of the pending data.
6197 */
6198 if (type != LE_ADV_SCAN_RSP || !match) {
6199 /* Send out whatever is in the cache, but skip duplicates */
6200 if (!match)
6201 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6202 d->last_adv_addr_type, NULL,
6203 d->last_adv_rssi, d->last_adv_flags,
6204 d->last_adv_data,
6205 d->last_adv_data_len, NULL, 0, 0);
6206
6207 /* If the new report will trigger a SCAN_REQ store it for
6208 * later merging.
6209 */
6210 if (!ext_adv && (type == LE_ADV_IND ||
6211 type == LE_ADV_SCAN_IND)) {
6212 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6213 rssi, flags, data, len);
6214 return;
6215 }
6216
6217 /* The advertising reports cannot be merged, so clear
6218 * the pending report and send out a device found event.
6219 */
6220 clear_pending_adv_report(hdev);
6221 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6222 rssi, flags, data, len, NULL, 0, 0);
6223 return;
6224 }
6225
6226 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6227 * the new event is a SCAN_RSP. We can therefore proceed with
6228 * sending a merged device found event.
6229 */
6230 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6231 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6232 d->last_adv_data, d->last_adv_data_len, data, len, 0);
6233 clear_pending_adv_report(hdev);
6234 }
6235
hci_le_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6236 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6237 struct sk_buff *skb)
6238 {
6239 struct hci_ev_le_advertising_report *ev = data;
6240 u64 instant = jiffies;
6241
6242 if (!ev->num)
6243 return;
6244
6245 hci_dev_lock(hdev);
6246
6247 while (ev->num--) {
6248 struct hci_ev_le_advertising_info *info;
6249 s8 rssi;
6250
6251 info = hci_le_ev_skb_pull(hdev, skb,
6252 HCI_EV_LE_ADVERTISING_REPORT,
6253 sizeof(*info));
6254 if (!info)
6255 break;
6256
6257 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6258 info->length + 1))
6259 break;
6260
6261 if (info->length <= max_adv_len(hdev)) {
6262 rssi = info->data[info->length];
6263 process_adv_report(hdev, info->type, &info->bdaddr,
6264 info->bdaddr_type, NULL, 0,
6265 HCI_ADV_PHY_1M, 0, rssi,
6266 info->data, info->length, false,
6267 false, instant);
6268 } else {
6269 bt_dev_err(hdev, "Dropping invalid advertising data");
6270 }
6271 }
6272
6273 hci_dev_unlock(hdev);
6274 }
6275
ext_evt_type_to_legacy(struct hci_dev * hdev,u16 evt_type)6276 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6277 {
6278 if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6279 switch (evt_type) {
6280 case LE_LEGACY_ADV_IND:
6281 return LE_ADV_IND;
6282 case LE_LEGACY_ADV_DIRECT_IND:
6283 return LE_ADV_DIRECT_IND;
6284 case LE_LEGACY_ADV_SCAN_IND:
6285 return LE_ADV_SCAN_IND;
6286 case LE_LEGACY_NONCONN_IND:
6287 return LE_ADV_NONCONN_IND;
6288 case LE_LEGACY_SCAN_RSP_ADV:
6289 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6290 return LE_ADV_SCAN_RSP;
6291 }
6292
6293 goto invalid;
6294 }
6295
6296 if (evt_type & LE_EXT_ADV_CONN_IND) {
6297 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6298 return LE_ADV_DIRECT_IND;
6299
6300 return LE_ADV_IND;
6301 }
6302
6303 if (evt_type & LE_EXT_ADV_SCAN_RSP)
6304 return LE_ADV_SCAN_RSP;
6305
6306 if (evt_type & LE_EXT_ADV_SCAN_IND)
6307 return LE_ADV_SCAN_IND;
6308
6309 if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6310 evt_type & LE_EXT_ADV_DIRECT_IND)
6311 return LE_ADV_NONCONN_IND;
6312
6313 invalid:
6314 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6315 evt_type);
6316
6317 return LE_ADV_INVALID;
6318 }
6319
hci_le_ext_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6320 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6321 struct sk_buff *skb)
6322 {
6323 struct hci_ev_le_ext_adv_report *ev = data;
6324 u64 instant = jiffies;
6325
6326 if (!ev->num)
6327 return;
6328
6329 hci_dev_lock(hdev);
6330
6331 while (ev->num--) {
6332 struct hci_ev_le_ext_adv_info *info;
6333 u8 legacy_evt_type;
6334 u16 evt_type;
6335
6336 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6337 sizeof(*info));
6338 if (!info)
6339 break;
6340
6341 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6342 info->length))
6343 break;
6344
6345 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6346 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6347
6348 if (test_bit(HCI_QUIRK_FIXUP_LE_EXT_ADV_REPORT_PHY,
6349 &hdev->quirks)) {
6350 info->primary_phy &= 0x1f;
6351 info->secondary_phy &= 0x1f;
6352 }
6353
6354 if (legacy_evt_type != LE_ADV_INVALID) {
6355 process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6356 info->bdaddr_type, NULL, 0,
6357 info->primary_phy,
6358 info->secondary_phy,
6359 info->rssi, info->data, info->length,
6360 !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6361 false, instant);
6362 }
6363 }
6364
6365 hci_dev_unlock(hdev);
6366 }
6367
hci_le_pa_term_sync(struct hci_dev * hdev,__le16 handle)6368 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6369 {
6370 struct hci_cp_le_pa_term_sync cp;
6371
6372 memset(&cp, 0, sizeof(cp));
6373 cp.handle = handle;
6374
6375 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6376 }
6377
hci_le_pa_sync_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6378 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6379 struct sk_buff *skb)
6380 {
6381 struct hci_ev_le_pa_sync_established *ev = data;
6382 int mask = hdev->link_mode;
6383 __u8 flags = 0;
6384 struct hci_conn *pa_sync, *conn;
6385
6386 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6387
6388 hci_dev_lock(hdev);
6389
6390 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6391
6392 conn = hci_conn_hash_lookup_create_pa_sync(hdev);
6393 if (!conn) {
6394 bt_dev_err(hdev,
6395 "Unable to find connection for dst %pMR sid 0x%2.2x",
6396 &ev->bdaddr, ev->sid);
6397 goto unlock;
6398 }
6399
6400 clear_bit(HCI_CONN_CREATE_PA_SYNC, &conn->flags);
6401
6402 conn->sync_handle = le16_to_cpu(ev->handle);
6403 conn->sid = HCI_SID_INVALID;
6404
6405 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags);
6406 if (!(mask & HCI_LM_ACCEPT)) {
6407 hci_le_pa_term_sync(hdev, ev->handle);
6408 goto unlock;
6409 }
6410
6411 if (!(flags & HCI_PROTO_DEFER))
6412 goto unlock;
6413
6414 /* Add connection to indicate PA sync event */
6415 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6416 HCI_ROLE_SLAVE);
6417
6418 if (IS_ERR(pa_sync))
6419 goto unlock;
6420
6421 pa_sync->sync_handle = le16_to_cpu(ev->handle);
6422
6423 if (ev->status) {
6424 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6425
6426 /* Notify iso layer */
6427 hci_connect_cfm(pa_sync, ev->status);
6428 }
6429
6430 unlock:
6431 hci_dev_unlock(hdev);
6432 }
6433
hci_le_per_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6434 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6435 struct sk_buff *skb)
6436 {
6437 struct hci_ev_le_per_adv_report *ev = data;
6438 int mask = hdev->link_mode;
6439 __u8 flags = 0;
6440 struct hci_conn *pa_sync;
6441
6442 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6443
6444 hci_dev_lock(hdev);
6445
6446 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6447 if (!(mask & HCI_LM_ACCEPT))
6448 goto unlock;
6449
6450 if (!(flags & HCI_PROTO_DEFER))
6451 goto unlock;
6452
6453 pa_sync = hci_conn_hash_lookup_pa_sync_handle
6454 (hdev,
6455 le16_to_cpu(ev->sync_handle));
6456
6457 if (!pa_sync)
6458 goto unlock;
6459
6460 if (ev->data_status == LE_PA_DATA_COMPLETE &&
6461 !test_and_set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags)) {
6462 /* Notify iso layer */
6463 hci_connect_cfm(pa_sync, 0);
6464
6465 /* Notify MGMT layer */
6466 mgmt_device_connected(hdev, pa_sync, NULL, 0);
6467 }
6468
6469 unlock:
6470 hci_dev_unlock(hdev);
6471 }
6472
hci_le_remote_feat_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6473 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6474 struct sk_buff *skb)
6475 {
6476 struct hci_ev_le_remote_feat_complete *ev = data;
6477 struct hci_conn *conn;
6478
6479 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6480
6481 hci_dev_lock(hdev);
6482
6483 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6484 if (conn) {
6485 if (!ev->status)
6486 memcpy(conn->features[0], ev->features, 8);
6487
6488 if (conn->state == BT_CONFIG) {
6489 __u8 status;
6490
6491 /* If the local controller supports peripheral-initiated
6492 * features exchange, but the remote controller does
6493 * not, then it is possible that the error code 0x1a
6494 * for unsupported remote feature gets returned.
6495 *
6496 * In this specific case, allow the connection to
6497 * transition into connected state and mark it as
6498 * successful.
6499 */
6500 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE &&
6501 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6502 status = 0x00;
6503 else
6504 status = ev->status;
6505
6506 conn->state = BT_CONNECTED;
6507 hci_connect_cfm(conn, status);
6508 hci_conn_drop(conn);
6509 }
6510 }
6511
6512 hci_dev_unlock(hdev);
6513 }
6514
hci_le_ltk_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6515 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6516 struct sk_buff *skb)
6517 {
6518 struct hci_ev_le_ltk_req *ev = data;
6519 struct hci_cp_le_ltk_reply cp;
6520 struct hci_cp_le_ltk_neg_reply neg;
6521 struct hci_conn *conn;
6522 struct smp_ltk *ltk;
6523
6524 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6525
6526 hci_dev_lock(hdev);
6527
6528 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6529 if (conn == NULL)
6530 goto not_found;
6531
6532 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6533 if (!ltk)
6534 goto not_found;
6535
6536 if (smp_ltk_is_sc(ltk)) {
6537 /* With SC both EDiv and Rand are set to zero */
6538 if (ev->ediv || ev->rand)
6539 goto not_found;
6540 } else {
6541 /* For non-SC keys check that EDiv and Rand match */
6542 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6543 goto not_found;
6544 }
6545
6546 memcpy(cp.ltk, ltk->val, ltk->enc_size);
6547 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6548 cp.handle = cpu_to_le16(conn->handle);
6549
6550 conn->pending_sec_level = smp_ltk_sec_level(ltk);
6551
6552 conn->enc_key_size = ltk->enc_size;
6553
6554 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6555
6556 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6557 * temporary key used to encrypt a connection following
6558 * pairing. It is used during the Encrypted Session Setup to
6559 * distribute the keys. Later, security can be re-established
6560 * using a distributed LTK.
6561 */
6562 if (ltk->type == SMP_STK) {
6563 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6564 list_del_rcu(<k->list);
6565 kfree_rcu(ltk, rcu);
6566 } else {
6567 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6568 }
6569
6570 hci_dev_unlock(hdev);
6571
6572 return;
6573
6574 not_found:
6575 neg.handle = ev->handle;
6576 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6577 hci_dev_unlock(hdev);
6578 }
6579
send_conn_param_neg_reply(struct hci_dev * hdev,u16 handle,u8 reason)6580 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6581 u8 reason)
6582 {
6583 struct hci_cp_le_conn_param_req_neg_reply cp;
6584
6585 cp.handle = cpu_to_le16(handle);
6586 cp.reason = reason;
6587
6588 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6589 &cp);
6590 }
6591
hci_le_remote_conn_param_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6592 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6593 struct sk_buff *skb)
6594 {
6595 struct hci_ev_le_remote_conn_param_req *ev = data;
6596 struct hci_cp_le_conn_param_req_reply cp;
6597 struct hci_conn *hcon;
6598 u16 handle, min, max, latency, timeout;
6599
6600 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6601
6602 handle = le16_to_cpu(ev->handle);
6603 min = le16_to_cpu(ev->interval_min);
6604 max = le16_to_cpu(ev->interval_max);
6605 latency = le16_to_cpu(ev->latency);
6606 timeout = le16_to_cpu(ev->timeout);
6607
6608 hcon = hci_conn_hash_lookup_handle(hdev, handle);
6609 if (!hcon || hcon->state != BT_CONNECTED)
6610 return send_conn_param_neg_reply(hdev, handle,
6611 HCI_ERROR_UNKNOWN_CONN_ID);
6612
6613 if (max > hcon->le_conn_max_interval)
6614 return send_conn_param_neg_reply(hdev, handle,
6615 HCI_ERROR_INVALID_LL_PARAMS);
6616
6617 if (hci_check_conn_params(min, max, latency, timeout))
6618 return send_conn_param_neg_reply(hdev, handle,
6619 HCI_ERROR_INVALID_LL_PARAMS);
6620
6621 if (hcon->role == HCI_ROLE_MASTER) {
6622 struct hci_conn_params *params;
6623 u8 store_hint;
6624
6625 hci_dev_lock(hdev);
6626
6627 params = hci_conn_params_lookup(hdev, &hcon->dst,
6628 hcon->dst_type);
6629 if (params) {
6630 params->conn_min_interval = min;
6631 params->conn_max_interval = max;
6632 params->conn_latency = latency;
6633 params->supervision_timeout = timeout;
6634 store_hint = 0x01;
6635 } else {
6636 store_hint = 0x00;
6637 }
6638
6639 hci_dev_unlock(hdev);
6640
6641 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6642 store_hint, min, max, latency, timeout);
6643 }
6644
6645 cp.handle = ev->handle;
6646 cp.interval_min = ev->interval_min;
6647 cp.interval_max = ev->interval_max;
6648 cp.latency = ev->latency;
6649 cp.timeout = ev->timeout;
6650 cp.min_ce_len = 0;
6651 cp.max_ce_len = 0;
6652
6653 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6654 }
6655
hci_le_direct_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6656 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6657 struct sk_buff *skb)
6658 {
6659 struct hci_ev_le_direct_adv_report *ev = data;
6660 u64 instant = jiffies;
6661 int i;
6662
6663 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6664 flex_array_size(ev, info, ev->num)))
6665 return;
6666
6667 if (!ev->num)
6668 return;
6669
6670 hci_dev_lock(hdev);
6671
6672 for (i = 0; i < ev->num; i++) {
6673 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6674
6675 process_adv_report(hdev, info->type, &info->bdaddr,
6676 info->bdaddr_type, &info->direct_addr,
6677 info->direct_addr_type, HCI_ADV_PHY_1M, 0,
6678 info->rssi, NULL, 0, false, false, instant);
6679 }
6680
6681 hci_dev_unlock(hdev);
6682 }
6683
hci_le_phy_update_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6684 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6685 struct sk_buff *skb)
6686 {
6687 struct hci_ev_le_phy_update_complete *ev = data;
6688 struct hci_conn *conn;
6689
6690 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6691
6692 if (ev->status)
6693 return;
6694
6695 hci_dev_lock(hdev);
6696
6697 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6698 if (!conn)
6699 goto unlock;
6700
6701 conn->le_tx_phy = ev->tx_phy;
6702 conn->le_rx_phy = ev->rx_phy;
6703
6704 unlock:
6705 hci_dev_unlock(hdev);
6706 }
6707
hci_le_cis_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6708 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6709 struct sk_buff *skb)
6710 {
6711 struct hci_evt_le_cis_established *ev = data;
6712 struct hci_conn *conn;
6713 struct bt_iso_qos *qos;
6714 bool pending = false;
6715 u16 handle = __le16_to_cpu(ev->handle);
6716 u32 c_sdu_interval, p_sdu_interval;
6717
6718 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6719
6720 hci_dev_lock(hdev);
6721
6722 conn = hci_conn_hash_lookup_handle(hdev, handle);
6723 if (!conn) {
6724 bt_dev_err(hdev,
6725 "Unable to find connection with handle 0x%4.4x",
6726 handle);
6727 goto unlock;
6728 }
6729
6730 if (conn->type != ISO_LINK) {
6731 bt_dev_err(hdev,
6732 "Invalid connection link type handle 0x%4.4x",
6733 handle);
6734 goto unlock;
6735 }
6736
6737 qos = &conn->iso_qos;
6738
6739 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6740
6741 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part G
6742 * page 3075:
6743 * Transport_Latency_C_To_P = CIG_Sync_Delay + (FT_C_To_P) ×
6744 * ISO_Interval + SDU_Interval_C_To_P
6745 * ...
6746 * SDU_Interval = (CIG_Sync_Delay + (FT) x ISO_Interval) -
6747 * Transport_Latency
6748 */
6749 c_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6750 (ev->c_ft * le16_to_cpu(ev->interval) * 1250)) -
6751 get_unaligned_le24(ev->c_latency);
6752 p_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6753 (ev->p_ft * le16_to_cpu(ev->interval) * 1250)) -
6754 get_unaligned_le24(ev->p_latency);
6755
6756 switch (conn->role) {
6757 case HCI_ROLE_SLAVE:
6758 qos->ucast.in.interval = c_sdu_interval;
6759 qos->ucast.out.interval = p_sdu_interval;
6760 /* Convert Transport Latency (us) to Latency (msec) */
6761 qos->ucast.in.latency =
6762 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6763 1000);
6764 qos->ucast.out.latency =
6765 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6766 1000);
6767 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6768 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6769 qos->ucast.in.phy = ev->c_phy;
6770 qos->ucast.out.phy = ev->p_phy;
6771 break;
6772 case HCI_ROLE_MASTER:
6773 qos->ucast.in.interval = p_sdu_interval;
6774 qos->ucast.out.interval = c_sdu_interval;
6775 /* Convert Transport Latency (us) to Latency (msec) */
6776 qos->ucast.out.latency =
6777 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6778 1000);
6779 qos->ucast.in.latency =
6780 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6781 1000);
6782 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6783 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6784 qos->ucast.out.phy = ev->c_phy;
6785 qos->ucast.in.phy = ev->p_phy;
6786 break;
6787 }
6788
6789 if (!ev->status) {
6790 conn->state = BT_CONNECTED;
6791 hci_debugfs_create_conn(conn);
6792 hci_conn_add_sysfs(conn);
6793 hci_iso_setup_path(conn);
6794 goto unlock;
6795 }
6796
6797 conn->state = BT_CLOSED;
6798 hci_connect_cfm(conn, ev->status);
6799 hci_conn_del(conn);
6800
6801 unlock:
6802 if (pending)
6803 hci_le_create_cis_pending(hdev);
6804
6805 hci_dev_unlock(hdev);
6806 }
6807
hci_le_reject_cis(struct hci_dev * hdev,__le16 handle)6808 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6809 {
6810 struct hci_cp_le_reject_cis cp;
6811
6812 memset(&cp, 0, sizeof(cp));
6813 cp.handle = handle;
6814 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6815 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6816 }
6817
hci_le_accept_cis(struct hci_dev * hdev,__le16 handle)6818 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6819 {
6820 struct hci_cp_le_accept_cis cp;
6821
6822 memset(&cp, 0, sizeof(cp));
6823 cp.handle = handle;
6824 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6825 }
6826
hci_le_cis_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6827 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6828 struct sk_buff *skb)
6829 {
6830 struct hci_evt_le_cis_req *ev = data;
6831 u16 acl_handle, cis_handle;
6832 struct hci_conn *acl, *cis;
6833 int mask;
6834 __u8 flags = 0;
6835
6836 acl_handle = __le16_to_cpu(ev->acl_handle);
6837 cis_handle = __le16_to_cpu(ev->cis_handle);
6838
6839 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
6840 acl_handle, cis_handle, ev->cig_id, ev->cis_id);
6841
6842 hci_dev_lock(hdev);
6843
6844 acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
6845 if (!acl)
6846 goto unlock;
6847
6848 mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
6849 if (!(mask & HCI_LM_ACCEPT)) {
6850 hci_le_reject_cis(hdev, ev->cis_handle);
6851 goto unlock;
6852 }
6853
6854 cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
6855 if (!cis) {
6856 cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
6857 cis_handle);
6858 if (IS_ERR(cis)) {
6859 hci_le_reject_cis(hdev, ev->cis_handle);
6860 goto unlock;
6861 }
6862 }
6863
6864 cis->iso_qos.ucast.cig = ev->cig_id;
6865 cis->iso_qos.ucast.cis = ev->cis_id;
6866
6867 if (!(flags & HCI_PROTO_DEFER)) {
6868 hci_le_accept_cis(hdev, ev->cis_handle);
6869 } else {
6870 cis->state = BT_CONNECT2;
6871 hci_connect_cfm(cis, 0);
6872 }
6873
6874 unlock:
6875 hci_dev_unlock(hdev);
6876 }
6877
hci_iso_term_big_sync(struct hci_dev * hdev,void * data)6878 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
6879 {
6880 u8 handle = PTR_UINT(data);
6881
6882 return hci_le_terminate_big_sync(hdev, handle,
6883 HCI_ERROR_LOCAL_HOST_TERM);
6884 }
6885
hci_le_create_big_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6886 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
6887 struct sk_buff *skb)
6888 {
6889 struct hci_evt_le_create_big_complete *ev = data;
6890 struct hci_conn *conn;
6891 __u8 i = 0;
6892
6893 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
6894
6895 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
6896 flex_array_size(ev, bis_handle, ev->num_bis)))
6897 return;
6898
6899 hci_dev_lock(hdev);
6900
6901 /* Connect all BISes that are bound to the BIG */
6902 while ((conn = hci_conn_hash_lookup_big_state(hdev, ev->handle,
6903 BT_BOUND))) {
6904 if (ev->status) {
6905 hci_connect_cfm(conn, ev->status);
6906 hci_conn_del(conn);
6907 continue;
6908 }
6909
6910 if (hci_conn_set_handle(conn,
6911 __le16_to_cpu(ev->bis_handle[i++])))
6912 continue;
6913
6914 conn->state = BT_CONNECTED;
6915 set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
6916 hci_debugfs_create_conn(conn);
6917 hci_conn_add_sysfs(conn);
6918 hci_iso_setup_path(conn);
6919 }
6920
6921 if (!ev->status && !i)
6922 /* If no BISes have been connected for the BIG,
6923 * terminate. This is in case all bound connections
6924 * have been closed before the BIG creation
6925 * has completed.
6926 */
6927 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
6928 UINT_PTR(ev->handle), NULL);
6929
6930 hci_dev_unlock(hdev);
6931 }
6932
hci_le_big_sync_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6933 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
6934 struct sk_buff *skb)
6935 {
6936 struct hci_evt_le_big_sync_estabilished *ev = data;
6937 struct hci_conn *bis, *conn;
6938 int i;
6939
6940 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6941
6942 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABLISHED,
6943 flex_array_size(ev, bis, ev->num_bis)))
6944 return;
6945
6946 hci_dev_lock(hdev);
6947
6948 conn = hci_conn_hash_lookup_big_sync_pend(hdev, ev->handle,
6949 ev->num_bis);
6950 if (!conn) {
6951 bt_dev_err(hdev,
6952 "Unable to find connection for big 0x%2.2x",
6953 ev->handle);
6954 goto unlock;
6955 }
6956
6957 clear_bit(HCI_CONN_CREATE_BIG_SYNC, &conn->flags);
6958
6959 conn->num_bis = 0;
6960 memset(conn->bis, 0, sizeof(conn->num_bis));
6961
6962 for (i = 0; i < ev->num_bis; i++) {
6963 u16 handle = le16_to_cpu(ev->bis[i]);
6964 __le32 interval;
6965
6966 bis = hci_conn_hash_lookup_handle(hdev, handle);
6967 if (!bis) {
6968 if (handle > HCI_CONN_HANDLE_MAX) {
6969 bt_dev_dbg(hdev, "ignore too large handle %u", handle);
6970 continue;
6971 }
6972 bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
6973 HCI_ROLE_SLAVE, handle);
6974 if (IS_ERR(bis))
6975 continue;
6976 }
6977
6978 if (ev->status != 0x42)
6979 /* Mark PA sync as established */
6980 set_bit(HCI_CONN_PA_SYNC, &bis->flags);
6981
6982 bis->sync_handle = conn->sync_handle;
6983 bis->iso_qos.bcast.big = ev->handle;
6984 memset(&interval, 0, sizeof(interval));
6985 memcpy(&interval, ev->latency, sizeof(ev->latency));
6986 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
6987 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
6988 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
6989 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
6990
6991 if (!ev->status) {
6992 set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
6993 hci_iso_setup_path(bis);
6994 }
6995 }
6996
6997 /* In case BIG sync failed, notify each failed connection to
6998 * the user after all hci connections have been added
6999 */
7000 if (ev->status)
7001 for (i = 0; i < ev->num_bis; i++) {
7002 u16 handle = le16_to_cpu(ev->bis[i]);
7003
7004 bis = hci_conn_hash_lookup_handle(hdev, handle);
7005 if (!bis)
7006 continue;
7007
7008 set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
7009 hci_connect_cfm(bis, ev->status);
7010 }
7011
7012 unlock:
7013 hci_dev_unlock(hdev);
7014 }
7015
hci_le_big_info_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)7016 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
7017 struct sk_buff *skb)
7018 {
7019 struct hci_evt_le_big_info_adv_report *ev = data;
7020 int mask = hdev->link_mode;
7021 __u8 flags = 0;
7022 struct hci_conn *pa_sync;
7023
7024 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
7025
7026 hci_dev_lock(hdev);
7027
7028 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
7029 if (!(mask & HCI_LM_ACCEPT))
7030 goto unlock;
7031
7032 if (!(flags & HCI_PROTO_DEFER))
7033 goto unlock;
7034
7035 pa_sync = hci_conn_hash_lookup_pa_sync_handle
7036 (hdev,
7037 le16_to_cpu(ev->sync_handle));
7038
7039 if (!pa_sync)
7040 goto unlock;
7041
7042 pa_sync->iso_qos.bcast.encryption = ev->encryption;
7043
7044 /* Notify iso layer */
7045 hci_connect_cfm(pa_sync, 0);
7046
7047 unlock:
7048 hci_dev_unlock(hdev);
7049 }
7050
7051 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
7052 [_op] = { \
7053 .func = _func, \
7054 .min_len = _min_len, \
7055 .max_len = _max_len, \
7056 }
7057
7058 #define HCI_LE_EV(_op, _func, _len) \
7059 HCI_LE_EV_VL(_op, _func, _len, _len)
7060
7061 #define HCI_LE_EV_STATUS(_op, _func) \
7062 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
7063
7064 /* Entries in this table shall have their position according to the subevent
7065 * opcode they handle so the use of the macros above is recommend since it does
7066 * attempt to initialize at its proper index using Designated Initializers that
7067 * way events without a callback function can be ommited.
7068 */
7069 static const struct hci_le_ev {
7070 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
7071 u16 min_len;
7072 u16 max_len;
7073 } hci_le_ev_table[U8_MAX + 1] = {
7074 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
7075 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
7076 sizeof(struct hci_ev_le_conn_complete)),
7077 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
7078 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
7079 sizeof(struct hci_ev_le_advertising_report),
7080 HCI_MAX_EVENT_SIZE),
7081 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7082 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7083 hci_le_conn_update_complete_evt,
7084 sizeof(struct hci_ev_le_conn_update_complete)),
7085 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7086 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7087 hci_le_remote_feat_complete_evt,
7088 sizeof(struct hci_ev_le_remote_feat_complete)),
7089 /* [0x05 = HCI_EV_LE_LTK_REQ] */
7090 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7091 sizeof(struct hci_ev_le_ltk_req)),
7092 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7093 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7094 hci_le_remote_conn_param_req_evt,
7095 sizeof(struct hci_ev_le_remote_conn_param_req)),
7096 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7097 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7098 hci_le_enh_conn_complete_evt,
7099 sizeof(struct hci_ev_le_enh_conn_complete)),
7100 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7101 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7102 sizeof(struct hci_ev_le_direct_adv_report),
7103 HCI_MAX_EVENT_SIZE),
7104 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7105 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7106 sizeof(struct hci_ev_le_phy_update_complete)),
7107 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7108 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7109 sizeof(struct hci_ev_le_ext_adv_report),
7110 HCI_MAX_EVENT_SIZE),
7111 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7112 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7113 hci_le_pa_sync_estabilished_evt,
7114 sizeof(struct hci_ev_le_pa_sync_established)),
7115 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7116 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7117 hci_le_per_adv_report_evt,
7118 sizeof(struct hci_ev_le_per_adv_report),
7119 HCI_MAX_EVENT_SIZE),
7120 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7121 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7122 sizeof(struct hci_evt_le_ext_adv_set_term)),
7123 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7124 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7125 sizeof(struct hci_evt_le_cis_established)),
7126 /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7127 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7128 sizeof(struct hci_evt_le_cis_req)),
7129 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7130 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7131 hci_le_create_big_complete_evt,
7132 sizeof(struct hci_evt_le_create_big_complete),
7133 HCI_MAX_EVENT_SIZE),
7134 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABLISHED] */
7135 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABLISHED,
7136 hci_le_big_sync_established_evt,
7137 sizeof(struct hci_evt_le_big_sync_estabilished),
7138 HCI_MAX_EVENT_SIZE),
7139 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7140 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7141 hci_le_big_info_adv_report_evt,
7142 sizeof(struct hci_evt_le_big_info_adv_report),
7143 HCI_MAX_EVENT_SIZE),
7144 };
7145
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)7146 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7147 struct sk_buff *skb, u16 *opcode, u8 *status,
7148 hci_req_complete_t *req_complete,
7149 hci_req_complete_skb_t *req_complete_skb)
7150 {
7151 struct hci_ev_le_meta *ev = data;
7152 const struct hci_le_ev *subev;
7153
7154 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7155
7156 /* Only match event if command OGF is for LE */
7157 if (hdev->req_skb &&
7158 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 &&
7159 hci_skb_event(hdev->req_skb) == ev->subevent) {
7160 *opcode = hci_skb_opcode(hdev->req_skb);
7161 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7162 req_complete_skb);
7163 }
7164
7165 subev = &hci_le_ev_table[ev->subevent];
7166 if (!subev->func)
7167 return;
7168
7169 if (skb->len < subev->min_len) {
7170 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7171 ev->subevent, skb->len, subev->min_len);
7172 return;
7173 }
7174
7175 /* Just warn if the length is over max_len size it still be
7176 * possible to partially parse the event so leave to callback to
7177 * decide if that is acceptable.
7178 */
7179 if (skb->len > subev->max_len)
7180 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7181 ev->subevent, skb->len, subev->max_len);
7182 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7183 if (!data)
7184 return;
7185
7186 subev->func(hdev, data, skb);
7187 }
7188
hci_get_cmd_complete(struct hci_dev * hdev,u16 opcode,u8 event,struct sk_buff * skb)7189 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7190 u8 event, struct sk_buff *skb)
7191 {
7192 struct hci_ev_cmd_complete *ev;
7193 struct hci_event_hdr *hdr;
7194
7195 if (!skb)
7196 return false;
7197
7198 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7199 if (!hdr)
7200 return false;
7201
7202 if (event) {
7203 if (hdr->evt != event)
7204 return false;
7205 return true;
7206 }
7207
7208 /* Check if request ended in Command Status - no way to retrieve
7209 * any extra parameters in this case.
7210 */
7211 if (hdr->evt == HCI_EV_CMD_STATUS)
7212 return false;
7213
7214 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7215 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7216 hdr->evt);
7217 return false;
7218 }
7219
7220 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7221 if (!ev)
7222 return false;
7223
7224 if (opcode != __le16_to_cpu(ev->opcode)) {
7225 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7226 __le16_to_cpu(ev->opcode));
7227 return false;
7228 }
7229
7230 return true;
7231 }
7232
hci_store_wake_reason(struct hci_dev * hdev,u8 event,struct sk_buff * skb)7233 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7234 struct sk_buff *skb)
7235 {
7236 struct hci_ev_le_advertising_info *adv;
7237 struct hci_ev_le_direct_adv_info *direct_adv;
7238 struct hci_ev_le_ext_adv_info *ext_adv;
7239 const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7240 const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7241
7242 hci_dev_lock(hdev);
7243
7244 /* If we are currently suspended and this is the first BT event seen,
7245 * save the wake reason associated with the event.
7246 */
7247 if (!hdev->suspended || hdev->wake_reason)
7248 goto unlock;
7249
7250 /* Default to remote wake. Values for wake_reason are documented in the
7251 * Bluez mgmt api docs.
7252 */
7253 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7254
7255 /* Once configured for remote wakeup, we should only wake up for
7256 * reconnections. It's useful to see which device is waking us up so
7257 * keep track of the bdaddr of the connection event that woke us up.
7258 */
7259 if (event == HCI_EV_CONN_REQUEST) {
7260 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7261 hdev->wake_addr_type = BDADDR_BREDR;
7262 } else if (event == HCI_EV_CONN_COMPLETE) {
7263 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7264 hdev->wake_addr_type = BDADDR_BREDR;
7265 } else if (event == HCI_EV_LE_META) {
7266 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7267 u8 subevent = le_ev->subevent;
7268 u8 *ptr = &skb->data[sizeof(*le_ev)];
7269 u8 num_reports = *ptr;
7270
7271 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7272 subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7273 subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7274 num_reports) {
7275 adv = (void *)(ptr + 1);
7276 direct_adv = (void *)(ptr + 1);
7277 ext_adv = (void *)(ptr + 1);
7278
7279 switch (subevent) {
7280 case HCI_EV_LE_ADVERTISING_REPORT:
7281 bacpy(&hdev->wake_addr, &adv->bdaddr);
7282 hdev->wake_addr_type = adv->bdaddr_type;
7283 break;
7284 case HCI_EV_LE_DIRECT_ADV_REPORT:
7285 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7286 hdev->wake_addr_type = direct_adv->bdaddr_type;
7287 break;
7288 case HCI_EV_LE_EXT_ADV_REPORT:
7289 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7290 hdev->wake_addr_type = ext_adv->bdaddr_type;
7291 break;
7292 }
7293 }
7294 } else {
7295 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7296 }
7297
7298 unlock:
7299 hci_dev_unlock(hdev);
7300 }
7301
7302 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7303 [_op] = { \
7304 .req = false, \
7305 .func = _func, \
7306 .min_len = _min_len, \
7307 .max_len = _max_len, \
7308 }
7309
7310 #define HCI_EV(_op, _func, _len) \
7311 HCI_EV_VL(_op, _func, _len, _len)
7312
7313 #define HCI_EV_STATUS(_op, _func) \
7314 HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7315
7316 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7317 [_op] = { \
7318 .req = true, \
7319 .func_req = _func, \
7320 .min_len = _min_len, \
7321 .max_len = _max_len, \
7322 }
7323
7324 #define HCI_EV_REQ(_op, _func, _len) \
7325 HCI_EV_REQ_VL(_op, _func, _len, _len)
7326
7327 /* Entries in this table shall have their position according to the event opcode
7328 * they handle so the use of the macros above is recommend since it does attempt
7329 * to initialize at its proper index using Designated Initializers that way
7330 * events without a callback function don't have entered.
7331 */
7332 static const struct hci_ev {
7333 bool req;
7334 union {
7335 void (*func)(struct hci_dev *hdev, void *data,
7336 struct sk_buff *skb);
7337 void (*func_req)(struct hci_dev *hdev, void *data,
7338 struct sk_buff *skb, u16 *opcode, u8 *status,
7339 hci_req_complete_t *req_complete,
7340 hci_req_complete_skb_t *req_complete_skb);
7341 };
7342 u16 min_len;
7343 u16 max_len;
7344 } hci_ev_table[U8_MAX + 1] = {
7345 /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7346 HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7347 /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7348 HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7349 sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7350 /* [0x03 = HCI_EV_CONN_COMPLETE] */
7351 HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7352 sizeof(struct hci_ev_conn_complete)),
7353 /* [0x04 = HCI_EV_CONN_REQUEST] */
7354 HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7355 sizeof(struct hci_ev_conn_request)),
7356 /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7357 HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7358 sizeof(struct hci_ev_disconn_complete)),
7359 /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7360 HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7361 sizeof(struct hci_ev_auth_complete)),
7362 /* [0x07 = HCI_EV_REMOTE_NAME] */
7363 HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7364 sizeof(struct hci_ev_remote_name)),
7365 /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7366 HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7367 sizeof(struct hci_ev_encrypt_change)),
7368 /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7369 HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7370 hci_change_link_key_complete_evt,
7371 sizeof(struct hci_ev_change_link_key_complete)),
7372 /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7373 HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7374 sizeof(struct hci_ev_remote_features)),
7375 /* [0x0e = HCI_EV_CMD_COMPLETE] */
7376 HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7377 sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7378 /* [0x0f = HCI_EV_CMD_STATUS] */
7379 HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7380 sizeof(struct hci_ev_cmd_status)),
7381 /* [0x10 = HCI_EV_CMD_STATUS] */
7382 HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7383 sizeof(struct hci_ev_hardware_error)),
7384 /* [0x12 = HCI_EV_ROLE_CHANGE] */
7385 HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7386 sizeof(struct hci_ev_role_change)),
7387 /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7388 HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7389 sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7390 /* [0x14 = HCI_EV_MODE_CHANGE] */
7391 HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7392 sizeof(struct hci_ev_mode_change)),
7393 /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7394 HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7395 sizeof(struct hci_ev_pin_code_req)),
7396 /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7397 HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7398 sizeof(struct hci_ev_link_key_req)),
7399 /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7400 HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7401 sizeof(struct hci_ev_link_key_notify)),
7402 /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7403 HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7404 sizeof(struct hci_ev_clock_offset)),
7405 /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7406 HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7407 sizeof(struct hci_ev_pkt_type_change)),
7408 /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7409 HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7410 sizeof(struct hci_ev_pscan_rep_mode)),
7411 /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7412 HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7413 hci_inquiry_result_with_rssi_evt,
7414 sizeof(struct hci_ev_inquiry_result_rssi),
7415 HCI_MAX_EVENT_SIZE),
7416 /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7417 HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7418 sizeof(struct hci_ev_remote_ext_features)),
7419 /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7420 HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7421 sizeof(struct hci_ev_sync_conn_complete)),
7422 /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7423 HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7424 hci_extended_inquiry_result_evt,
7425 sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7426 /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7427 HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7428 sizeof(struct hci_ev_key_refresh_complete)),
7429 /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7430 HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7431 sizeof(struct hci_ev_io_capa_request)),
7432 /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7433 HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7434 sizeof(struct hci_ev_io_capa_reply)),
7435 /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7436 HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7437 sizeof(struct hci_ev_user_confirm_req)),
7438 /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7439 HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7440 sizeof(struct hci_ev_user_passkey_req)),
7441 /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7442 HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7443 sizeof(struct hci_ev_remote_oob_data_request)),
7444 /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7445 HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7446 sizeof(struct hci_ev_simple_pair_complete)),
7447 /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7448 HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7449 sizeof(struct hci_ev_user_passkey_notify)),
7450 /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7451 HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7452 sizeof(struct hci_ev_keypress_notify)),
7453 /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7454 HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7455 sizeof(struct hci_ev_remote_host_features)),
7456 /* [0x3e = HCI_EV_LE_META] */
7457 HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7458 sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7459 /* [0xff = HCI_EV_VENDOR] */
7460 HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7461 };
7462
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)7463 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7464 u16 *opcode, u8 *status,
7465 hci_req_complete_t *req_complete,
7466 hci_req_complete_skb_t *req_complete_skb)
7467 {
7468 const struct hci_ev *ev = &hci_ev_table[event];
7469 void *data;
7470
7471 if (!ev->func)
7472 return;
7473
7474 if (skb->len < ev->min_len) {
7475 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7476 event, skb->len, ev->min_len);
7477 return;
7478 }
7479
7480 /* Just warn if the length is over max_len size it still be
7481 * possible to partially parse the event so leave to callback to
7482 * decide if that is acceptable.
7483 */
7484 if (skb->len > ev->max_len)
7485 bt_dev_warn_ratelimited(hdev,
7486 "unexpected event 0x%2.2x length: %u > %u",
7487 event, skb->len, ev->max_len);
7488
7489 data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7490 if (!data)
7491 return;
7492
7493 if (ev->req)
7494 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7495 req_complete_skb);
7496 else
7497 ev->func(hdev, data, skb);
7498 }
7499
hci_event_packet(struct hci_dev * hdev,struct sk_buff * skb)7500 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7501 {
7502 struct hci_event_hdr *hdr = (void *) skb->data;
7503 hci_req_complete_t req_complete = NULL;
7504 hci_req_complete_skb_t req_complete_skb = NULL;
7505 struct sk_buff *orig_skb = NULL;
7506 u8 status = 0, event, req_evt = 0;
7507 u16 opcode = HCI_OP_NOP;
7508
7509 if (skb->len < sizeof(*hdr)) {
7510 bt_dev_err(hdev, "Malformed HCI Event");
7511 goto done;
7512 }
7513
7514 kfree_skb(hdev->recv_event);
7515 hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7516
7517 event = hdr->evt;
7518 if (!event) {
7519 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7520 event);
7521 goto done;
7522 }
7523
7524 /* Only match event if command OGF is not for LE */
7525 if (hdev->req_skb &&
7526 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) != 0x08 &&
7527 hci_skb_event(hdev->req_skb) == event) {
7528 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->req_skb),
7529 status, &req_complete, &req_complete_skb);
7530 req_evt = event;
7531 }
7532
7533 /* If it looks like we might end up having to call
7534 * req_complete_skb, store a pristine copy of the skb since the
7535 * various handlers may modify the original one through
7536 * skb_pull() calls, etc.
7537 */
7538 if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7539 event == HCI_EV_CMD_COMPLETE)
7540 orig_skb = skb_clone(skb, GFP_KERNEL);
7541
7542 skb_pull(skb, HCI_EVENT_HDR_SIZE);
7543
7544 /* Store wake reason if we're suspended */
7545 hci_store_wake_reason(hdev, event, skb);
7546
7547 bt_dev_dbg(hdev, "event 0x%2.2x", event);
7548
7549 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7550 &req_complete_skb);
7551
7552 if (req_complete) {
7553 req_complete(hdev, status, opcode);
7554 } else if (req_complete_skb) {
7555 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7556 kfree_skb(orig_skb);
7557 orig_skb = NULL;
7558 }
7559 req_complete_skb(hdev, status, opcode, orig_skb);
7560 }
7561
7562 done:
7563 kfree_skb(orig_skb);
7564 kfree_skb(skb);
7565 hdev->stat.evt_rx++;
7566 }
7567