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_read_rssi(struct hci_dev * hdev,void * data,struct sk_buff * skb)2153 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data,
2154 struct sk_buff *skb)
2155 {
2156 struct hci_rp_read_rssi *rp = data;
2157 struct hci_conn *conn;
2158
2159 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2160
2161 if (rp->status)
2162 return rp->status;
2163
2164 hci_dev_lock(hdev);
2165
2166 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2167 if (conn)
2168 conn->rssi = rp->rssi;
2169
2170 hci_dev_unlock(hdev);
2171
2172 return rp->status;
2173 }
2174
hci_cc_read_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)2175 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data,
2176 struct sk_buff *skb)
2177 {
2178 struct hci_cp_read_tx_power *sent;
2179 struct hci_rp_read_tx_power *rp = data;
2180 struct hci_conn *conn;
2181
2182 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2183
2184 if (rp->status)
2185 return rp->status;
2186
2187 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
2188 if (!sent)
2189 return rp->status;
2190
2191 hci_dev_lock(hdev);
2192
2193 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2194 if (!conn)
2195 goto unlock;
2196
2197 switch (sent->type) {
2198 case 0x00:
2199 conn->tx_power = rp->tx_power;
2200 break;
2201 case 0x01:
2202 conn->max_tx_power = rp->tx_power;
2203 break;
2204 }
2205
2206 unlock:
2207 hci_dev_unlock(hdev);
2208 return rp->status;
2209 }
2210
hci_cc_write_ssp_debug_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)2211 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data,
2212 struct sk_buff *skb)
2213 {
2214 struct hci_ev_status *rp = data;
2215 u8 *mode;
2216
2217 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2218
2219 if (rp->status)
2220 return rp->status;
2221
2222 mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
2223 if (mode)
2224 hdev->ssp_debug_mode = *mode;
2225
2226 return rp->status;
2227 }
2228
hci_cs_inquiry(struct hci_dev * hdev,__u8 status)2229 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
2230 {
2231 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2232
2233 if (status)
2234 return;
2235
2236 if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
2237 set_bit(HCI_INQUIRY, &hdev->flags);
2238 }
2239
hci_cs_create_conn(struct hci_dev * hdev,__u8 status)2240 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
2241 {
2242 struct hci_cp_create_conn *cp;
2243 struct hci_conn *conn;
2244
2245 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2246
2247 cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
2248 if (!cp)
2249 return;
2250
2251 hci_dev_lock(hdev);
2252
2253 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2254
2255 bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn);
2256
2257 if (status) {
2258 if (conn && conn->state == BT_CONNECT) {
2259 conn->state = BT_CLOSED;
2260 hci_connect_cfm(conn, status);
2261 hci_conn_del(conn);
2262 }
2263 } else {
2264 if (!conn) {
2265 conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
2266 HCI_ROLE_MASTER);
2267 if (IS_ERR(conn))
2268 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
2269 }
2270 }
2271
2272 hci_dev_unlock(hdev);
2273 }
2274
hci_cs_add_sco(struct hci_dev * hdev,__u8 status)2275 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
2276 {
2277 struct hci_cp_add_sco *cp;
2278 struct hci_conn *acl;
2279 struct hci_link *link;
2280 __u16 handle;
2281
2282 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2283
2284 if (!status)
2285 return;
2286
2287 cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
2288 if (!cp)
2289 return;
2290
2291 handle = __le16_to_cpu(cp->handle);
2292
2293 bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
2294
2295 hci_dev_lock(hdev);
2296
2297 acl = hci_conn_hash_lookup_handle(hdev, handle);
2298 if (acl) {
2299 link = list_first_entry_or_null(&acl->link_list,
2300 struct hci_link, list);
2301 if (link && link->conn) {
2302 link->conn->state = BT_CLOSED;
2303
2304 hci_connect_cfm(link->conn, status);
2305 hci_conn_del(link->conn);
2306 }
2307 }
2308
2309 hci_dev_unlock(hdev);
2310 }
2311
hci_cs_auth_requested(struct hci_dev * hdev,__u8 status)2312 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
2313 {
2314 struct hci_cp_auth_requested *cp;
2315 struct hci_conn *conn;
2316
2317 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2318
2319 if (!status)
2320 return;
2321
2322 cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
2323 if (!cp)
2324 return;
2325
2326 hci_dev_lock(hdev);
2327
2328 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2329 if (conn) {
2330 if (conn->state == BT_CONFIG) {
2331 hci_connect_cfm(conn, status);
2332 hci_conn_drop(conn);
2333 }
2334 }
2335
2336 hci_dev_unlock(hdev);
2337 }
2338
hci_cs_set_conn_encrypt(struct hci_dev * hdev,__u8 status)2339 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
2340 {
2341 struct hci_cp_set_conn_encrypt *cp;
2342 struct hci_conn *conn;
2343
2344 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2345
2346 if (!status)
2347 return;
2348
2349 cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
2350 if (!cp)
2351 return;
2352
2353 hci_dev_lock(hdev);
2354
2355 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2356 if (conn) {
2357 if (conn->state == BT_CONFIG) {
2358 hci_connect_cfm(conn, status);
2359 hci_conn_drop(conn);
2360 }
2361 }
2362
2363 hci_dev_unlock(hdev);
2364 }
2365
hci_outgoing_auth_needed(struct hci_dev * hdev,struct hci_conn * conn)2366 static int hci_outgoing_auth_needed(struct hci_dev *hdev,
2367 struct hci_conn *conn)
2368 {
2369 if (conn->state != BT_CONFIG || !conn->out)
2370 return 0;
2371
2372 if (conn->pending_sec_level == BT_SECURITY_SDP)
2373 return 0;
2374
2375 /* Only request authentication for SSP connections or non-SSP
2376 * devices with sec_level MEDIUM or HIGH or if MITM protection
2377 * is requested.
2378 */
2379 if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
2380 conn->pending_sec_level != BT_SECURITY_FIPS &&
2381 conn->pending_sec_level != BT_SECURITY_HIGH &&
2382 conn->pending_sec_level != BT_SECURITY_MEDIUM)
2383 return 0;
2384
2385 return 1;
2386 }
2387
hci_resolve_name(struct hci_dev * hdev,struct inquiry_entry * e)2388 static int hci_resolve_name(struct hci_dev *hdev,
2389 struct inquiry_entry *e)
2390 {
2391 struct hci_cp_remote_name_req cp;
2392
2393 memset(&cp, 0, sizeof(cp));
2394
2395 bacpy(&cp.bdaddr, &e->data.bdaddr);
2396 cp.pscan_rep_mode = e->data.pscan_rep_mode;
2397 cp.pscan_mode = e->data.pscan_mode;
2398 cp.clock_offset = e->data.clock_offset;
2399
2400 return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
2401 }
2402
hci_resolve_next_name(struct hci_dev * hdev)2403 static bool hci_resolve_next_name(struct hci_dev *hdev)
2404 {
2405 struct discovery_state *discov = &hdev->discovery;
2406 struct inquiry_entry *e;
2407
2408 if (list_empty(&discov->resolve))
2409 return false;
2410
2411 /* We should stop if we already spent too much time resolving names. */
2412 if (time_after(jiffies, discov->name_resolve_timeout)) {
2413 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long.");
2414 return false;
2415 }
2416
2417 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2418 if (!e)
2419 return false;
2420
2421 if (hci_resolve_name(hdev, e) == 0) {
2422 e->name_state = NAME_PENDING;
2423 return true;
2424 }
2425
2426 return false;
2427 }
2428
hci_check_pending_name(struct hci_dev * hdev,struct hci_conn * conn,bdaddr_t * bdaddr,u8 * name,u8 name_len)2429 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
2430 bdaddr_t *bdaddr, u8 *name, u8 name_len)
2431 {
2432 struct discovery_state *discov = &hdev->discovery;
2433 struct inquiry_entry *e;
2434
2435 /* Update the mgmt connected state if necessary. Be careful with
2436 * conn objects that exist but are not (yet) connected however.
2437 * Only those in BT_CONFIG or BT_CONNECTED states can be
2438 * considered connected.
2439 */
2440 if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED))
2441 mgmt_device_connected(hdev, conn, name, name_len);
2442
2443 if (discov->state == DISCOVERY_STOPPED)
2444 return;
2445
2446 if (discov->state == DISCOVERY_STOPPING)
2447 goto discov_complete;
2448
2449 if (discov->state != DISCOVERY_RESOLVING)
2450 return;
2451
2452 e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
2453 /* If the device was not found in a list of found devices names of which
2454 * are pending. there is no need to continue resolving a next name as it
2455 * will be done upon receiving another Remote Name Request Complete
2456 * Event */
2457 if (!e)
2458 return;
2459
2460 list_del(&e->list);
2461
2462 e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN;
2463 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi,
2464 name, name_len);
2465
2466 if (hci_resolve_next_name(hdev))
2467 return;
2468
2469 discov_complete:
2470 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2471 }
2472
hci_cs_remote_name_req(struct hci_dev * hdev,__u8 status)2473 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
2474 {
2475 struct hci_cp_remote_name_req *cp;
2476 struct hci_conn *conn;
2477
2478 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2479
2480 /* If successful wait for the name req complete event before
2481 * checking for the need to do authentication */
2482 if (!status)
2483 return;
2484
2485 cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
2486 if (!cp)
2487 return;
2488
2489 hci_dev_lock(hdev);
2490
2491 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2492
2493 if (hci_dev_test_flag(hdev, HCI_MGMT))
2494 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
2495
2496 if (!conn)
2497 goto unlock;
2498
2499 if (!hci_outgoing_auth_needed(hdev, conn))
2500 goto unlock;
2501
2502 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2503 struct hci_cp_auth_requested auth_cp;
2504
2505 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2506
2507 auth_cp.handle = __cpu_to_le16(conn->handle);
2508 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
2509 sizeof(auth_cp), &auth_cp);
2510 }
2511
2512 unlock:
2513 hci_dev_unlock(hdev);
2514 }
2515
hci_cs_read_remote_features(struct hci_dev * hdev,__u8 status)2516 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
2517 {
2518 struct hci_cp_read_remote_features *cp;
2519 struct hci_conn *conn;
2520
2521 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2522
2523 if (!status)
2524 return;
2525
2526 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
2527 if (!cp)
2528 return;
2529
2530 hci_dev_lock(hdev);
2531
2532 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2533 if (conn) {
2534 if (conn->state == BT_CONFIG) {
2535 hci_connect_cfm(conn, status);
2536 hci_conn_drop(conn);
2537 }
2538 }
2539
2540 hci_dev_unlock(hdev);
2541 }
2542
hci_cs_read_remote_ext_features(struct hci_dev * hdev,__u8 status)2543 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
2544 {
2545 struct hci_cp_read_remote_ext_features *cp;
2546 struct hci_conn *conn;
2547
2548 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2549
2550 if (!status)
2551 return;
2552
2553 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
2554 if (!cp)
2555 return;
2556
2557 hci_dev_lock(hdev);
2558
2559 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2560 if (conn) {
2561 if (conn->state == BT_CONFIG) {
2562 hci_connect_cfm(conn, status);
2563 hci_conn_drop(conn);
2564 }
2565 }
2566
2567 hci_dev_unlock(hdev);
2568 }
2569
hci_setup_sync_conn_status(struct hci_dev * hdev,__u16 handle,__u8 status)2570 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle,
2571 __u8 status)
2572 {
2573 struct hci_conn *acl;
2574 struct hci_link *link;
2575
2576 bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status);
2577
2578 hci_dev_lock(hdev);
2579
2580 acl = hci_conn_hash_lookup_handle(hdev, handle);
2581 if (acl) {
2582 link = list_first_entry_or_null(&acl->link_list,
2583 struct hci_link, list);
2584 if (link && link->conn) {
2585 link->conn->state = BT_CLOSED;
2586
2587 hci_connect_cfm(link->conn, status);
2588 hci_conn_del(link->conn);
2589 }
2590 }
2591
2592 hci_dev_unlock(hdev);
2593 }
2594
hci_cs_setup_sync_conn(struct hci_dev * hdev,__u8 status)2595 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2596 {
2597 struct hci_cp_setup_sync_conn *cp;
2598
2599 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2600
2601 if (!status)
2602 return;
2603
2604 cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
2605 if (!cp)
2606 return;
2607
2608 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2609 }
2610
hci_cs_enhanced_setup_sync_conn(struct hci_dev * hdev,__u8 status)2611 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2612 {
2613 struct hci_cp_enhanced_setup_sync_conn *cp;
2614
2615 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2616
2617 if (!status)
2618 return;
2619
2620 cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN);
2621 if (!cp)
2622 return;
2623
2624 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2625 }
2626
hci_cs_sniff_mode(struct hci_dev * hdev,__u8 status)2627 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
2628 {
2629 struct hci_cp_sniff_mode *cp;
2630 struct hci_conn *conn;
2631
2632 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2633
2634 if (!status)
2635 return;
2636
2637 cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
2638 if (!cp)
2639 return;
2640
2641 hci_dev_lock(hdev);
2642
2643 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2644 if (conn) {
2645 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2646
2647 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2648 hci_sco_setup(conn, status);
2649 }
2650
2651 hci_dev_unlock(hdev);
2652 }
2653
hci_cs_exit_sniff_mode(struct hci_dev * hdev,__u8 status)2654 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
2655 {
2656 struct hci_cp_exit_sniff_mode *cp;
2657 struct hci_conn *conn;
2658
2659 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2660
2661 if (!status)
2662 return;
2663
2664 cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
2665 if (!cp)
2666 return;
2667
2668 hci_dev_lock(hdev);
2669
2670 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2671 if (conn) {
2672 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2673
2674 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2675 hci_sco_setup(conn, status);
2676 }
2677
2678 hci_dev_unlock(hdev);
2679 }
2680
hci_cs_disconnect(struct hci_dev * hdev,u8 status)2681 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
2682 {
2683 struct hci_cp_disconnect *cp;
2684 struct hci_conn_params *params;
2685 struct hci_conn *conn;
2686 bool mgmt_conn;
2687
2688 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2689
2690 /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
2691 * otherwise cleanup the connection immediately.
2692 */
2693 if (!status && !hdev->suspended)
2694 return;
2695
2696 cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
2697 if (!cp)
2698 return;
2699
2700 hci_dev_lock(hdev);
2701
2702 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2703 if (!conn)
2704 goto unlock;
2705
2706 if (status) {
2707 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2708 conn->dst_type, status);
2709
2710 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
2711 hdev->cur_adv_instance = conn->adv_instance;
2712 hci_enable_advertising(hdev);
2713 }
2714
2715 /* Inform sockets conn is gone before we delete it */
2716 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED);
2717
2718 goto done;
2719 }
2720
2721 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
2722
2723 if (conn->type == ACL_LINK) {
2724 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
2725 hci_remove_link_key(hdev, &conn->dst);
2726 }
2727
2728 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
2729 if (params) {
2730 switch (params->auto_connect) {
2731 case HCI_AUTO_CONN_LINK_LOSS:
2732 if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT)
2733 break;
2734 fallthrough;
2735
2736 case HCI_AUTO_CONN_DIRECT:
2737 case HCI_AUTO_CONN_ALWAYS:
2738 hci_pend_le_list_del_init(params);
2739 hci_pend_le_list_add(params, &hdev->pend_le_conns);
2740 break;
2741
2742 default:
2743 break;
2744 }
2745 }
2746
2747 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
2748 cp->reason, mgmt_conn);
2749
2750 hci_disconn_cfm(conn, cp->reason);
2751
2752 done:
2753 /* If the disconnection failed for any reason, the upper layer
2754 * does not retry to disconnect in current implementation.
2755 * Hence, we need to do some basic cleanup here and re-enable
2756 * advertising if necessary.
2757 */
2758 hci_conn_del(conn);
2759 unlock:
2760 hci_dev_unlock(hdev);
2761 }
2762
ev_bdaddr_type(struct hci_dev * hdev,u8 type,bool * resolved)2763 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved)
2764 {
2765 /* When using controller based address resolution, then the new
2766 * address types 0x02 and 0x03 are used. These types need to be
2767 * converted back into either public address or random address type
2768 */
2769 switch (type) {
2770 case ADDR_LE_DEV_PUBLIC_RESOLVED:
2771 if (resolved)
2772 *resolved = true;
2773 return ADDR_LE_DEV_PUBLIC;
2774 case ADDR_LE_DEV_RANDOM_RESOLVED:
2775 if (resolved)
2776 *resolved = true;
2777 return ADDR_LE_DEV_RANDOM;
2778 }
2779
2780 if (resolved)
2781 *resolved = false;
2782 return type;
2783 }
2784
cs_le_create_conn(struct hci_dev * hdev,bdaddr_t * peer_addr,u8 peer_addr_type,u8 own_address_type,u8 filter_policy)2785 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
2786 u8 peer_addr_type, u8 own_address_type,
2787 u8 filter_policy)
2788 {
2789 struct hci_conn *conn;
2790
2791 conn = hci_conn_hash_lookup_le(hdev, peer_addr,
2792 peer_addr_type);
2793 if (!conn)
2794 return;
2795
2796 own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL);
2797
2798 /* Store the initiator and responder address information which
2799 * is needed for SMP. These values will not change during the
2800 * lifetime of the connection.
2801 */
2802 conn->init_addr_type = own_address_type;
2803 if (own_address_type == ADDR_LE_DEV_RANDOM)
2804 bacpy(&conn->init_addr, &hdev->random_addr);
2805 else
2806 bacpy(&conn->init_addr, &hdev->bdaddr);
2807
2808 conn->resp_addr_type = peer_addr_type;
2809 bacpy(&conn->resp_addr, peer_addr);
2810 }
2811
hci_cs_le_create_conn(struct hci_dev * hdev,u8 status)2812 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
2813 {
2814 struct hci_cp_le_create_conn *cp;
2815
2816 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2817
2818 /* All connection failure handling is taken care of by the
2819 * hci_conn_failed function which is triggered by the HCI
2820 * request completion callbacks used for connecting.
2821 */
2822 if (status)
2823 return;
2824
2825 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
2826 if (!cp)
2827 return;
2828
2829 hci_dev_lock(hdev);
2830
2831 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2832 cp->own_address_type, cp->filter_policy);
2833
2834 hci_dev_unlock(hdev);
2835 }
2836
hci_cs_le_ext_create_conn(struct hci_dev * hdev,u8 status)2837 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
2838 {
2839 struct hci_cp_le_ext_create_conn *cp;
2840
2841 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2842
2843 /* All connection failure handling is taken care of by the
2844 * hci_conn_failed function which is triggered by the HCI
2845 * request completion callbacks used for connecting.
2846 */
2847 if (status)
2848 return;
2849
2850 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
2851 if (!cp)
2852 return;
2853
2854 hci_dev_lock(hdev);
2855
2856 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2857 cp->own_addr_type, cp->filter_policy);
2858
2859 hci_dev_unlock(hdev);
2860 }
2861
hci_cs_le_read_remote_features(struct hci_dev * hdev,u8 status)2862 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
2863 {
2864 struct hci_cp_le_read_remote_features *cp;
2865 struct hci_conn *conn;
2866
2867 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2868
2869 if (!status)
2870 return;
2871
2872 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
2873 if (!cp)
2874 return;
2875
2876 hci_dev_lock(hdev);
2877
2878 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2879 if (conn) {
2880 if (conn->state == BT_CONFIG) {
2881 hci_connect_cfm(conn, status);
2882 hci_conn_drop(conn);
2883 }
2884 }
2885
2886 hci_dev_unlock(hdev);
2887 }
2888
hci_cs_le_start_enc(struct hci_dev * hdev,u8 status)2889 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
2890 {
2891 struct hci_cp_le_start_enc *cp;
2892 struct hci_conn *conn;
2893
2894 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2895
2896 if (!status)
2897 return;
2898
2899 hci_dev_lock(hdev);
2900
2901 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
2902 if (!cp)
2903 goto unlock;
2904
2905 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2906 if (!conn)
2907 goto unlock;
2908
2909 if (conn->state != BT_CONNECTED)
2910 goto unlock;
2911
2912 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
2913 hci_conn_drop(conn);
2914
2915 unlock:
2916 hci_dev_unlock(hdev);
2917 }
2918
hci_cs_switch_role(struct hci_dev * hdev,u8 status)2919 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
2920 {
2921 struct hci_cp_switch_role *cp;
2922 struct hci_conn *conn;
2923
2924 BT_DBG("%s status 0x%2.2x", hdev->name, status);
2925
2926 if (!status)
2927 return;
2928
2929 cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
2930 if (!cp)
2931 return;
2932
2933 hci_dev_lock(hdev);
2934
2935 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2936 if (conn)
2937 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
2938
2939 hci_dev_unlock(hdev);
2940 }
2941
hci_inquiry_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)2942 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data,
2943 struct sk_buff *skb)
2944 {
2945 struct hci_ev_status *ev = data;
2946 struct discovery_state *discov = &hdev->discovery;
2947 struct inquiry_entry *e;
2948
2949 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
2950
2951 if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
2952 return;
2953
2954 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
2955 wake_up_bit(&hdev->flags, HCI_INQUIRY);
2956
2957 if (!hci_dev_test_flag(hdev, HCI_MGMT))
2958 return;
2959
2960 hci_dev_lock(hdev);
2961
2962 if (discov->state != DISCOVERY_FINDING)
2963 goto unlock;
2964
2965 if (list_empty(&discov->resolve)) {
2966 /* When BR/EDR inquiry is active and no LE scanning is in
2967 * progress, then change discovery state to indicate completion.
2968 *
2969 * When running LE scanning and BR/EDR inquiry simultaneously
2970 * and the LE scan already finished, then change the discovery
2971 * state to indicate completion.
2972 */
2973 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2974 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
2975 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2976 goto unlock;
2977 }
2978
2979 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2980 if (e && hci_resolve_name(hdev, e) == 0) {
2981 e->name_state = NAME_PENDING;
2982 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
2983 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION;
2984 } else {
2985 /* When BR/EDR inquiry is active and no LE scanning is in
2986 * progress, then change discovery state to indicate completion.
2987 *
2988 * When running LE scanning and BR/EDR inquiry simultaneously
2989 * and the LE scan already finished, then change the discovery
2990 * state to indicate completion.
2991 */
2992 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2993 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
2994 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2995 }
2996
2997 unlock:
2998 hci_dev_unlock(hdev);
2999 }
3000
hci_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)3001 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata,
3002 struct sk_buff *skb)
3003 {
3004 struct hci_ev_inquiry_result *ev = edata;
3005 struct inquiry_data data;
3006 int i;
3007
3008 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT,
3009 flex_array_size(ev, info, ev->num)))
3010 return;
3011
3012 bt_dev_dbg(hdev, "num %d", ev->num);
3013
3014 if (!ev->num)
3015 return;
3016
3017 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
3018 return;
3019
3020 hci_dev_lock(hdev);
3021
3022 for (i = 0; i < ev->num; i++) {
3023 struct inquiry_info *info = &ev->info[i];
3024 u32 flags;
3025
3026 bacpy(&data.bdaddr, &info->bdaddr);
3027 data.pscan_rep_mode = info->pscan_rep_mode;
3028 data.pscan_period_mode = info->pscan_period_mode;
3029 data.pscan_mode = info->pscan_mode;
3030 memcpy(data.dev_class, info->dev_class, 3);
3031 data.clock_offset = info->clock_offset;
3032 data.rssi = HCI_RSSI_INVALID;
3033 data.ssp_mode = 0x00;
3034
3035 flags = hci_inquiry_cache_update(hdev, &data, false);
3036
3037 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3038 info->dev_class, HCI_RSSI_INVALID,
3039 flags, NULL, 0, NULL, 0, 0);
3040 }
3041
3042 hci_dev_unlock(hdev);
3043 }
3044
hci_read_enc_key_size(struct hci_dev * hdev,struct hci_conn * conn)3045 static int hci_read_enc_key_size(struct hci_dev *hdev, struct hci_conn *conn)
3046 {
3047 struct hci_cp_read_enc_key_size cp;
3048 u8 *key_enc_size = hci_conn_key_enc_size(conn);
3049
3050 if (!read_key_size_capable(hdev)) {
3051 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3052 return -EOPNOTSUPP;
3053 }
3054
3055 bt_dev_dbg(hdev, "hcon %p", conn);
3056
3057 memset(&cp, 0, sizeof(cp));
3058 cp.handle = cpu_to_le16(conn->handle);
3059
3060 /* If the key enc_size is already known, use it as conn->enc_key_size,
3061 * otherwise use hdev->min_enc_key_size so the likes of
3062 * l2cap_check_enc_key_size don't fail while waiting for
3063 * HCI_OP_READ_ENC_KEY_SIZE response.
3064 */
3065 if (key_enc_size && *key_enc_size)
3066 conn->enc_key_size = *key_enc_size;
3067 else
3068 conn->enc_key_size = hdev->min_enc_key_size;
3069
3070 return hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE, sizeof(cp), &cp);
3071 }
3072
hci_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3073 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
3074 struct sk_buff *skb)
3075 {
3076 struct hci_ev_conn_complete *ev = data;
3077 struct hci_conn *conn;
3078 u8 status = ev->status;
3079
3080 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3081
3082 hci_dev_lock(hdev);
3083
3084 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
3085 if (!conn) {
3086 /* In case of error status and there is no connection pending
3087 * just unlock as there is nothing to cleanup.
3088 */
3089 if (ev->status)
3090 goto unlock;
3091
3092 /* Connection may not exist if auto-connected. Check the bredr
3093 * allowlist to see if this device is allowed to auto connect.
3094 * If link is an ACL type, create a connection class
3095 * automatically.
3096 *
3097 * Auto-connect will only occur if the event filter is
3098 * programmed with a given address. Right now, event filter is
3099 * only used during suspend.
3100 */
3101 if (ev->link_type == ACL_LINK &&
3102 hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
3103 &ev->bdaddr,
3104 BDADDR_BREDR)) {
3105 conn = hci_conn_add_unset(hdev, ev->link_type,
3106 &ev->bdaddr, HCI_ROLE_SLAVE);
3107 if (IS_ERR(conn)) {
3108 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3109 goto unlock;
3110 }
3111 } else {
3112 if (ev->link_type != SCO_LINK)
3113 goto unlock;
3114
3115 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK,
3116 &ev->bdaddr);
3117 if (!conn)
3118 goto unlock;
3119
3120 conn->type = SCO_LINK;
3121 }
3122 }
3123
3124 /* The HCI_Connection_Complete event is only sent once per connection.
3125 * Processing it more than once per connection can corrupt kernel memory.
3126 *
3127 * As the connection handle is set here for the first time, it indicates
3128 * whether the connection is already set up.
3129 */
3130 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
3131 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
3132 goto unlock;
3133 }
3134
3135 if (!status) {
3136 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
3137 if (status)
3138 goto done;
3139
3140 if (conn->type == ACL_LINK) {
3141 conn->state = BT_CONFIG;
3142 hci_conn_hold(conn);
3143
3144 if (!conn->out && !hci_conn_ssp_enabled(conn) &&
3145 !hci_find_link_key(hdev, &ev->bdaddr))
3146 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
3147 else
3148 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3149 } else
3150 conn->state = BT_CONNECTED;
3151
3152 hci_debugfs_create_conn(conn);
3153 hci_conn_add_sysfs(conn);
3154
3155 if (test_bit(HCI_AUTH, &hdev->flags))
3156 set_bit(HCI_CONN_AUTH, &conn->flags);
3157
3158 if (test_bit(HCI_ENCRYPT, &hdev->flags))
3159 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3160
3161 /* "Link key request" completed ahead of "connect request" completes */
3162 if (ev->encr_mode == 1 && !test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3163 ev->link_type == ACL_LINK) {
3164 struct link_key *key;
3165
3166 key = hci_find_link_key(hdev, &ev->bdaddr);
3167 if (key) {
3168 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3169 hci_read_enc_key_size(hdev, conn);
3170 hci_encrypt_cfm(conn, ev->status);
3171 }
3172 }
3173
3174 /* Get remote features */
3175 if (conn->type == ACL_LINK) {
3176 struct hci_cp_read_remote_features cp;
3177 cp.handle = ev->handle;
3178 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
3179 sizeof(cp), &cp);
3180
3181 hci_update_scan(hdev);
3182 }
3183
3184 /* Set packet type for incoming connection */
3185 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
3186 struct hci_cp_change_conn_ptype cp;
3187 cp.handle = ev->handle;
3188 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3189 hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
3190 &cp);
3191 }
3192 }
3193
3194 if (conn->type == ACL_LINK)
3195 hci_sco_setup(conn, ev->status);
3196
3197 done:
3198 if (status) {
3199 hci_conn_failed(conn, status);
3200 } else if (ev->link_type == SCO_LINK) {
3201 switch (conn->setting & SCO_AIRMODE_MASK) {
3202 case SCO_AIRMODE_CVSD:
3203 if (hdev->notify)
3204 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
3205 break;
3206 }
3207
3208 hci_connect_cfm(conn, status);
3209 }
3210
3211 unlock:
3212 hci_dev_unlock(hdev);
3213 }
3214
hci_reject_conn(struct hci_dev * hdev,bdaddr_t * bdaddr)3215 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
3216 {
3217 struct hci_cp_reject_conn_req cp;
3218
3219 bacpy(&cp.bdaddr, bdaddr);
3220 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
3221 hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
3222 }
3223
hci_conn_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3224 static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
3225 struct sk_buff *skb)
3226 {
3227 struct hci_ev_conn_request *ev = data;
3228 int mask = hdev->link_mode;
3229 struct inquiry_entry *ie;
3230 struct hci_conn *conn;
3231 __u8 flags = 0;
3232
3233 bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type);
3234
3235 /* Reject incoming connection from device with same BD ADDR against
3236 * CVE-2020-26555
3237 */
3238 if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
3239 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
3240 &ev->bdaddr);
3241 hci_reject_conn(hdev, &ev->bdaddr);
3242 return;
3243 }
3244
3245 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
3246 &flags);
3247
3248 if (!(mask & HCI_LM_ACCEPT)) {
3249 hci_reject_conn(hdev, &ev->bdaddr);
3250 return;
3251 }
3252
3253 hci_dev_lock(hdev);
3254
3255 if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
3256 BDADDR_BREDR)) {
3257 hci_reject_conn(hdev, &ev->bdaddr);
3258 goto unlock;
3259 }
3260
3261 /* Require HCI_CONNECTABLE or an accept list entry to accept the
3262 * connection. These features are only touched through mgmt so
3263 * only do the checks if HCI_MGMT is set.
3264 */
3265 if (hci_dev_test_flag(hdev, HCI_MGMT) &&
3266 !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
3267 !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
3268 BDADDR_BREDR)) {
3269 hci_reject_conn(hdev, &ev->bdaddr);
3270 goto unlock;
3271 }
3272
3273 /* Connection accepted */
3274
3275 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3276 if (ie)
3277 memcpy(ie->data.dev_class, ev->dev_class, 3);
3278
3279 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
3280 &ev->bdaddr);
3281 if (!conn) {
3282 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr,
3283 HCI_ROLE_SLAVE);
3284 if (IS_ERR(conn)) {
3285 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3286 goto unlock;
3287 }
3288 }
3289
3290 memcpy(conn->dev_class, ev->dev_class, 3);
3291
3292 hci_dev_unlock(hdev);
3293
3294 if (ev->link_type == ACL_LINK ||
3295 (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
3296 struct hci_cp_accept_conn_req cp;
3297 conn->state = BT_CONNECT;
3298
3299 bacpy(&cp.bdaddr, &ev->bdaddr);
3300
3301 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
3302 cp.role = 0x00; /* Become central */
3303 else
3304 cp.role = 0x01; /* Remain peripheral */
3305
3306 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
3307 } else if (!(flags & HCI_PROTO_DEFER)) {
3308 struct hci_cp_accept_sync_conn_req cp;
3309 conn->state = BT_CONNECT;
3310
3311 bacpy(&cp.bdaddr, &ev->bdaddr);
3312 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3313
3314 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
3315 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
3316 cp.max_latency = cpu_to_le16(0xffff);
3317 cp.content_format = cpu_to_le16(hdev->voice_setting);
3318 cp.retrans_effort = 0xff;
3319
3320 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
3321 &cp);
3322 } else {
3323 conn->state = BT_CONNECT2;
3324 hci_connect_cfm(conn, 0);
3325 }
3326
3327 return;
3328 unlock:
3329 hci_dev_unlock(hdev);
3330 }
3331
hci_to_mgmt_reason(u8 err)3332 static u8 hci_to_mgmt_reason(u8 err)
3333 {
3334 switch (err) {
3335 case HCI_ERROR_CONNECTION_TIMEOUT:
3336 return MGMT_DEV_DISCONN_TIMEOUT;
3337 case HCI_ERROR_REMOTE_USER_TERM:
3338 case HCI_ERROR_REMOTE_LOW_RESOURCES:
3339 case HCI_ERROR_REMOTE_POWER_OFF:
3340 return MGMT_DEV_DISCONN_REMOTE;
3341 case HCI_ERROR_LOCAL_HOST_TERM:
3342 return MGMT_DEV_DISCONN_LOCAL_HOST;
3343 default:
3344 return MGMT_DEV_DISCONN_UNKNOWN;
3345 }
3346 }
3347
hci_disconn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3348 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
3349 struct sk_buff *skb)
3350 {
3351 struct hci_ev_disconn_complete *ev = data;
3352 u8 reason;
3353 struct hci_conn_params *params;
3354 struct hci_conn *conn;
3355 bool mgmt_connected;
3356
3357 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3358
3359 hci_dev_lock(hdev);
3360
3361 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3362 if (!conn)
3363 goto unlock;
3364
3365 if (ev->status) {
3366 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
3367 conn->dst_type, ev->status);
3368 goto unlock;
3369 }
3370
3371 conn->state = BT_CLOSED;
3372
3373 mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
3374
3375 if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
3376 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
3377 else
3378 reason = hci_to_mgmt_reason(ev->reason);
3379
3380 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
3381 reason, mgmt_connected);
3382
3383 if (conn->type == ACL_LINK) {
3384 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
3385 hci_remove_link_key(hdev, &conn->dst);
3386
3387 hci_update_scan(hdev);
3388 }
3389
3390 /* Re-enable passive scanning if disconnected device is marked
3391 * as auto-connectable.
3392 */
3393 if (conn->type == LE_LINK) {
3394 params = hci_conn_params_lookup(hdev, &conn->dst,
3395 conn->dst_type);
3396 if (params) {
3397 switch (params->auto_connect) {
3398 case HCI_AUTO_CONN_LINK_LOSS:
3399 if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
3400 break;
3401 fallthrough;
3402
3403 case HCI_AUTO_CONN_DIRECT:
3404 case HCI_AUTO_CONN_ALWAYS:
3405 hci_pend_le_list_del_init(params);
3406 hci_pend_le_list_add(params,
3407 &hdev->pend_le_conns);
3408 hci_update_passive_scan(hdev);
3409 break;
3410
3411 default:
3412 break;
3413 }
3414 }
3415 }
3416
3417 hci_disconn_cfm(conn, ev->reason);
3418
3419 /* Re-enable advertising if necessary, since it might
3420 * have been disabled by the connection. From the
3421 * HCI_LE_Set_Advertise_Enable command description in
3422 * the core specification (v4.0):
3423 * "The Controller shall continue advertising until the Host
3424 * issues an LE_Set_Advertise_Enable command with
3425 * Advertising_Enable set to 0x00 (Advertising is disabled)
3426 * or until a connection is created or until the Advertising
3427 * is timed out due to Directed Advertising."
3428 */
3429 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
3430 hdev->cur_adv_instance = conn->adv_instance;
3431 hci_enable_advertising(hdev);
3432 }
3433
3434 hci_conn_del(conn);
3435
3436 unlock:
3437 hci_dev_unlock(hdev);
3438 }
3439
hci_auth_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3440 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data,
3441 struct sk_buff *skb)
3442 {
3443 struct hci_ev_auth_complete *ev = data;
3444 struct hci_conn *conn;
3445
3446 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3447
3448 hci_dev_lock(hdev);
3449
3450 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3451 if (!conn)
3452 goto unlock;
3453
3454 if (!ev->status) {
3455 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3456 set_bit(HCI_CONN_AUTH, &conn->flags);
3457 conn->sec_level = conn->pending_sec_level;
3458 } else {
3459 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3460 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3461
3462 mgmt_auth_failed(conn, ev->status);
3463 }
3464
3465 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3466
3467 if (conn->state == BT_CONFIG) {
3468 if (!ev->status && hci_conn_ssp_enabled(conn)) {
3469 struct hci_cp_set_conn_encrypt cp;
3470 cp.handle = ev->handle;
3471 cp.encrypt = 0x01;
3472 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3473 &cp);
3474 } else {
3475 conn->state = BT_CONNECTED;
3476 hci_connect_cfm(conn, ev->status);
3477 hci_conn_drop(conn);
3478 }
3479 } else {
3480 hci_auth_cfm(conn, ev->status);
3481
3482 hci_conn_hold(conn);
3483 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3484 hci_conn_drop(conn);
3485 }
3486
3487 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
3488 if (!ev->status) {
3489 struct hci_cp_set_conn_encrypt cp;
3490 cp.handle = ev->handle;
3491 cp.encrypt = 0x01;
3492 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3493 &cp);
3494 } else {
3495 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3496 hci_encrypt_cfm(conn, ev->status);
3497 }
3498 }
3499
3500 unlock:
3501 hci_dev_unlock(hdev);
3502 }
3503
hci_remote_name_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3504 static void hci_remote_name_evt(struct hci_dev *hdev, void *data,
3505 struct sk_buff *skb)
3506 {
3507 struct hci_ev_remote_name *ev = data;
3508 struct hci_conn *conn;
3509
3510 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3511
3512 hci_dev_lock(hdev);
3513
3514 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3515
3516 if (!hci_dev_test_flag(hdev, HCI_MGMT))
3517 goto check_auth;
3518
3519 if (ev->status == 0)
3520 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
3521 strnlen(ev->name, HCI_MAX_NAME_LENGTH));
3522 else
3523 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
3524
3525 check_auth:
3526 if (!conn)
3527 goto unlock;
3528
3529 if (!hci_outgoing_auth_needed(hdev, conn))
3530 goto unlock;
3531
3532 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
3533 struct hci_cp_auth_requested cp;
3534
3535 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
3536
3537 cp.handle = __cpu_to_le16(conn->handle);
3538 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
3539 }
3540
3541 unlock:
3542 hci_dev_unlock(hdev);
3543 }
3544
hci_encrypt_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3545 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data,
3546 struct sk_buff *skb)
3547 {
3548 struct hci_ev_encrypt_change *ev = data;
3549 struct hci_conn *conn;
3550
3551 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3552
3553 hci_dev_lock(hdev);
3554
3555 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3556 if (!conn)
3557 goto unlock;
3558
3559 if (!ev->status) {
3560 if (ev->encrypt) {
3561 /* Encryption implies authentication */
3562 set_bit(HCI_CONN_AUTH, &conn->flags);
3563 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3564 conn->sec_level = conn->pending_sec_level;
3565
3566 /* P-256 authentication key implies FIPS */
3567 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
3568 set_bit(HCI_CONN_FIPS, &conn->flags);
3569
3570 if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
3571 conn->type == LE_LINK)
3572 set_bit(HCI_CONN_AES_CCM, &conn->flags);
3573 } else {
3574 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
3575 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
3576 }
3577 }
3578
3579 /* We should disregard the current RPA and generate a new one
3580 * whenever the encryption procedure fails.
3581 */
3582 if (ev->status && conn->type == LE_LINK) {
3583 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
3584 hci_adv_instances_set_rpa_expired(hdev, true);
3585 }
3586
3587 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3588
3589 /* Check link security requirements are met */
3590 if (!hci_conn_check_link_mode(conn))
3591 ev->status = HCI_ERROR_AUTH_FAILURE;
3592
3593 if (ev->status && conn->state == BT_CONNECTED) {
3594 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3595 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3596
3597 /* Notify upper layers so they can cleanup before
3598 * disconnecting.
3599 */
3600 hci_encrypt_cfm(conn, ev->status);
3601 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
3602 hci_conn_drop(conn);
3603 goto unlock;
3604 }
3605
3606 /* Try reading the encryption key size for encrypted ACL links */
3607 if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
3608 if (hci_read_enc_key_size(hdev, conn))
3609 goto notify;
3610
3611 goto unlock;
3612 }
3613
3614 /* We skip the WRITE_AUTH_PAYLOAD_TIMEOUT for ATS2851 based controllers
3615 * to avoid unexpected SMP command errors when pairing.
3616 */
3617 if (test_bit(HCI_QUIRK_BROKEN_WRITE_AUTH_PAYLOAD_TIMEOUT,
3618 &hdev->quirks))
3619 goto notify;
3620
3621 /* Set the default Authenticated Payload Timeout after
3622 * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
3623 * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
3624 * sent when the link is active and Encryption is enabled, the conn
3625 * type can be either LE or ACL and controller must support LMP Ping.
3626 * Ensure for AES-CCM encryption as well.
3627 */
3628 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3629 test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
3630 ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
3631 (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
3632 struct hci_cp_write_auth_payload_to cp;
3633
3634 cp.handle = cpu_to_le16(conn->handle);
3635 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
3636 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
3637 sizeof(cp), &cp))
3638 bt_dev_err(hdev, "write auth payload timeout failed");
3639 }
3640
3641 notify:
3642 hci_encrypt_cfm(conn, ev->status);
3643
3644 unlock:
3645 hci_dev_unlock(hdev);
3646 }
3647
hci_change_link_key_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3648 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data,
3649 struct sk_buff *skb)
3650 {
3651 struct hci_ev_change_link_key_complete *ev = data;
3652 struct hci_conn *conn;
3653
3654 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3655
3656 hci_dev_lock(hdev);
3657
3658 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3659 if (conn) {
3660 if (!ev->status)
3661 set_bit(HCI_CONN_SECURE, &conn->flags);
3662
3663 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3664
3665 hci_key_change_cfm(conn, ev->status);
3666 }
3667
3668 hci_dev_unlock(hdev);
3669 }
3670
hci_remote_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3671 static void hci_remote_features_evt(struct hci_dev *hdev, void *data,
3672 struct sk_buff *skb)
3673 {
3674 struct hci_ev_remote_features *ev = data;
3675 struct hci_conn *conn;
3676
3677 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3678
3679 hci_dev_lock(hdev);
3680
3681 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3682 if (!conn)
3683 goto unlock;
3684
3685 if (!ev->status)
3686 memcpy(conn->features[0], ev->features, 8);
3687
3688 if (conn->state != BT_CONFIG)
3689 goto unlock;
3690
3691 if (!ev->status && lmp_ext_feat_capable(hdev) &&
3692 lmp_ext_feat_capable(conn)) {
3693 struct hci_cp_read_remote_ext_features cp;
3694 cp.handle = ev->handle;
3695 cp.page = 0x01;
3696 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
3697 sizeof(cp), &cp);
3698 goto unlock;
3699 }
3700
3701 if (!ev->status) {
3702 struct hci_cp_remote_name_req cp;
3703 memset(&cp, 0, sizeof(cp));
3704 bacpy(&cp.bdaddr, &conn->dst);
3705 cp.pscan_rep_mode = 0x02;
3706 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
3707 } else {
3708 mgmt_device_connected(hdev, conn, NULL, 0);
3709 }
3710
3711 if (!hci_outgoing_auth_needed(hdev, conn)) {
3712 conn->state = BT_CONNECTED;
3713 hci_connect_cfm(conn, ev->status);
3714 hci_conn_drop(conn);
3715 }
3716
3717 unlock:
3718 hci_dev_unlock(hdev);
3719 }
3720
handle_cmd_cnt_and_timer(struct hci_dev * hdev,u8 ncmd)3721 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd)
3722 {
3723 cancel_delayed_work(&hdev->cmd_timer);
3724
3725 rcu_read_lock();
3726 if (!test_bit(HCI_RESET, &hdev->flags)) {
3727 if (ncmd) {
3728 cancel_delayed_work(&hdev->ncmd_timer);
3729 atomic_set(&hdev->cmd_cnt, 1);
3730 } else {
3731 if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
3732 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer,
3733 HCI_NCMD_TIMEOUT);
3734 }
3735 }
3736 rcu_read_unlock();
3737 }
3738
hci_cc_le_read_buffer_size_v2(struct hci_dev * hdev,void * data,struct sk_buff * skb)3739 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data,
3740 struct sk_buff *skb)
3741 {
3742 struct hci_rp_le_read_buffer_size_v2 *rp = data;
3743
3744 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3745
3746 if (rp->status)
3747 return rp->status;
3748
3749 hdev->le_mtu = __le16_to_cpu(rp->acl_mtu);
3750 hdev->le_pkts = rp->acl_max_pkt;
3751 hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu);
3752 hdev->iso_pkts = rp->iso_max_pkt;
3753
3754 hdev->le_cnt = hdev->le_pkts;
3755 hdev->iso_cnt = hdev->iso_pkts;
3756
3757 BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
3758 hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
3759
3760 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
3761 return HCI_ERROR_INVALID_PARAMETERS;
3762
3763 return rp->status;
3764 }
3765
hci_unbound_cis_failed(struct hci_dev * hdev,u8 cig,u8 status)3766 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status)
3767 {
3768 struct hci_conn *conn, *tmp;
3769
3770 lockdep_assert_held(&hdev->lock);
3771
3772 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
3773 if (conn->type != CIS_LINK ||
3774 conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig)
3775 continue;
3776
3777 if (HCI_CONN_HANDLE_UNSET(conn->handle))
3778 hci_conn_failed(conn, status);
3779 }
3780 }
3781
hci_cc_le_set_cig_params(struct hci_dev * hdev,void * data,struct sk_buff * skb)3782 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
3783 struct sk_buff *skb)
3784 {
3785 struct hci_rp_le_set_cig_params *rp = data;
3786 struct hci_cp_le_set_cig_params *cp;
3787 struct hci_conn *conn;
3788 u8 status = rp->status;
3789 bool pending = false;
3790 int i;
3791
3792 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3793
3794 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
3795 if (!rp->status && (!cp || rp->num_handles != cp->num_cis ||
3796 rp->cig_id != cp->cig_id)) {
3797 bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
3798 status = HCI_ERROR_UNSPECIFIED;
3799 }
3800
3801 hci_dev_lock(hdev);
3802
3803 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554
3804 *
3805 * If the Status return parameter is non-zero, then the state of the CIG
3806 * and its CIS configurations shall not be changed by the command. If
3807 * the CIG did not already exist, it shall not be created.
3808 */
3809 if (status) {
3810 /* Keep current configuration, fail only the unbound CIS */
3811 hci_unbound_cis_failed(hdev, rp->cig_id, status);
3812 goto unlock;
3813 }
3814
3815 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
3816 *
3817 * If the Status return parameter is zero, then the Controller shall
3818 * set the Connection_Handle arrayed return parameter to the connection
3819 * handle(s) corresponding to the CIS configurations specified in
3820 * the CIS_IDs command parameter, in the same order.
3821 */
3822 for (i = 0; i < rp->num_handles; ++i) {
3823 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
3824 cp->cis[i].cis_id);
3825 if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
3826 continue;
3827
3828 if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
3829 continue;
3830
3831 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i])))
3832 continue;
3833
3834 if (conn->state == BT_CONNECT)
3835 pending = true;
3836 }
3837
3838 unlock:
3839 if (pending)
3840 hci_le_create_cis_pending(hdev);
3841
3842 hci_dev_unlock(hdev);
3843
3844 return rp->status;
3845 }
3846
hci_cc_le_setup_iso_path(struct hci_dev * hdev,void * data,struct sk_buff * skb)3847 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data,
3848 struct sk_buff *skb)
3849 {
3850 struct hci_rp_le_setup_iso_path *rp = data;
3851 struct hci_cp_le_setup_iso_path *cp;
3852 struct hci_conn *conn;
3853
3854 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3855
3856 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH);
3857 if (!cp)
3858 return rp->status;
3859
3860 hci_dev_lock(hdev);
3861
3862 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
3863 if (!conn)
3864 goto unlock;
3865
3866 if (rp->status) {
3867 hci_connect_cfm(conn, rp->status);
3868 hci_conn_del(conn);
3869 goto unlock;
3870 }
3871
3872 switch (cp->direction) {
3873 /* Input (Host to Controller) */
3874 case 0x00:
3875 /* Only confirm connection if output only */
3876 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu)
3877 hci_connect_cfm(conn, rp->status);
3878 break;
3879 /* Output (Controller to Host) */
3880 case 0x01:
3881 /* Confirm connection since conn->iso_qos is always configured
3882 * last.
3883 */
3884 hci_connect_cfm(conn, rp->status);
3885
3886 /* Notify device connected in case it is a BIG Sync */
3887 if (!rp->status && test_bit(HCI_CONN_BIG_SYNC, &conn->flags))
3888 mgmt_device_connected(hdev, conn, NULL, 0);
3889
3890 break;
3891 }
3892
3893 unlock:
3894 hci_dev_unlock(hdev);
3895 return rp->status;
3896 }
3897
hci_cs_le_create_big(struct hci_dev * hdev,u8 status)3898 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status)
3899 {
3900 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3901 }
3902
hci_cc_set_per_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)3903 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data,
3904 struct sk_buff *skb)
3905 {
3906 struct hci_ev_status *rp = data;
3907 struct hci_cp_le_set_per_adv_params *cp;
3908
3909 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3910
3911 if (rp->status)
3912 return rp->status;
3913
3914 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS);
3915 if (!cp)
3916 return rp->status;
3917
3918 /* TODO: set the conn state */
3919 return rp->status;
3920 }
3921
hci_cc_le_set_per_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)3922 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data,
3923 struct sk_buff *skb)
3924 {
3925 struct hci_ev_status *rp = data;
3926 struct hci_cp_le_set_per_adv_enable *cp;
3927 struct adv_info *adv = NULL, *n;
3928 u8 per_adv_cnt = 0;
3929
3930 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3931
3932 if (rp->status)
3933 return rp->status;
3934
3935 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE);
3936 if (!cp)
3937 return rp->status;
3938
3939 hci_dev_lock(hdev);
3940
3941 adv = hci_find_adv_instance(hdev, cp->handle);
3942
3943 if (cp->enable) {
3944 hci_dev_set_flag(hdev, HCI_LE_PER_ADV);
3945
3946 if (adv)
3947 adv->enabled = true;
3948 } else {
3949 /* If just one instance was disabled check if there are
3950 * any other instance enabled before clearing HCI_LE_PER_ADV.
3951 * The current periodic adv instance will be marked as
3952 * disabled once extended advertising is also disabled.
3953 */
3954 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
3955 list) {
3956 if (adv->periodic && adv->enabled)
3957 per_adv_cnt++;
3958 }
3959
3960 if (per_adv_cnt > 1)
3961 goto unlock;
3962
3963 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV);
3964 }
3965
3966 unlock:
3967 hci_dev_unlock(hdev);
3968
3969 return rp->status;
3970 }
3971
3972 #define HCI_CC_VL(_op, _func, _min, _max) \
3973 { \
3974 .op = _op, \
3975 .func = _func, \
3976 .min_len = _min, \
3977 .max_len = _max, \
3978 }
3979
3980 #define HCI_CC(_op, _func, _len) \
3981 HCI_CC_VL(_op, _func, _len, _len)
3982
3983 #define HCI_CC_STATUS(_op, _func) \
3984 HCI_CC(_op, _func, sizeof(struct hci_ev_status))
3985
3986 static const struct hci_cc {
3987 u16 op;
3988 u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
3989 u16 min_len;
3990 u16 max_len;
3991 } hci_cc_table[] = {
3992 HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel),
3993 HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq),
3994 HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq),
3995 HCI_CC(HCI_OP_REMOTE_NAME_REQ_CANCEL, hci_cc_remote_name_req_cancel,
3996 sizeof(struct hci_rp_remote_name_req_cancel)),
3997 HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery,
3998 sizeof(struct hci_rp_role_discovery)),
3999 HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy,
4000 sizeof(struct hci_rp_read_link_policy)),
4001 HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy,
4002 sizeof(struct hci_rp_write_link_policy)),
4003 HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy,
4004 sizeof(struct hci_rp_read_def_link_policy)),
4005 HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY,
4006 hci_cc_write_def_link_policy),
4007 HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset),
4008 HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key,
4009 sizeof(struct hci_rp_read_stored_link_key)),
4010 HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key,
4011 sizeof(struct hci_rp_delete_stored_link_key)),
4012 HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name),
4013 HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name,
4014 sizeof(struct hci_rp_read_local_name)),
4015 HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable),
4016 HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
4017 HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable),
4018 HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter),
4019 HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev,
4020 sizeof(struct hci_rp_read_class_of_dev)),
4021 HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev),
4022 HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting,
4023 sizeof(struct hci_rp_read_voice_setting)),
4024 HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting),
4025 HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac,
4026 sizeof(struct hci_rp_read_num_supported_iac)),
4027 HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode),
4028 HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support),
4029 HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout,
4030 sizeof(struct hci_rp_read_auth_payload_to)),
4031 HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout,
4032 sizeof(struct hci_rp_write_auth_payload_to)),
4033 HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version,
4034 sizeof(struct hci_rp_read_local_version)),
4035 HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands,
4036 sizeof(struct hci_rp_read_local_commands)),
4037 HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features,
4038 sizeof(struct hci_rp_read_local_features)),
4039 HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features,
4040 sizeof(struct hci_rp_read_local_ext_features)),
4041 HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size,
4042 sizeof(struct hci_rp_read_buffer_size)),
4043 HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr,
4044 sizeof(struct hci_rp_read_bd_addr)),
4045 HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts,
4046 sizeof(struct hci_rp_read_local_pairing_opts)),
4047 HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity,
4048 sizeof(struct hci_rp_read_page_scan_activity)),
4049 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
4050 hci_cc_write_page_scan_activity),
4051 HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type,
4052 sizeof(struct hci_rp_read_page_scan_type)),
4053 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type),
4054 HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock,
4055 sizeof(struct hci_rp_read_clock)),
4056 HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size,
4057 sizeof(struct hci_rp_read_enc_key_size)),
4058 HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power,
4059 sizeof(struct hci_rp_read_inq_rsp_tx_power)),
4060 HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4061 hci_cc_read_def_err_data_reporting,
4062 sizeof(struct hci_rp_read_def_err_data_reporting)),
4063 HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4064 hci_cc_write_def_err_data_reporting),
4065 HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply,
4066 sizeof(struct hci_rp_pin_code_reply)),
4067 HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply,
4068 sizeof(struct hci_rp_pin_code_neg_reply)),
4069 HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data,
4070 sizeof(struct hci_rp_read_local_oob_data)),
4071 HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data,
4072 sizeof(struct hci_rp_read_local_oob_ext_data)),
4073 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size,
4074 sizeof(struct hci_rp_le_read_buffer_size)),
4075 HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features,
4076 sizeof(struct hci_rp_le_read_local_features)),
4077 HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power,
4078 sizeof(struct hci_rp_le_read_adv_tx_power)),
4079 HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply,
4080 sizeof(struct hci_rp_user_confirm_reply)),
4081 HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply,
4082 sizeof(struct hci_rp_user_confirm_reply)),
4083 HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply,
4084 sizeof(struct hci_rp_user_confirm_reply)),
4085 HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply,
4086 sizeof(struct hci_rp_user_confirm_reply)),
4087 HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr),
4088 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable),
4089 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param),
4090 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable),
4091 HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4092 hci_cc_le_read_accept_list_size,
4093 sizeof(struct hci_rp_le_read_accept_list_size)),
4094 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list),
4095 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST,
4096 hci_cc_le_add_to_accept_list),
4097 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
4098 hci_cc_le_del_from_accept_list),
4099 HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states,
4100 sizeof(struct hci_rp_le_read_supported_states)),
4101 HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len,
4102 sizeof(struct hci_rp_le_read_def_data_len)),
4103 HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN,
4104 hci_cc_le_write_def_data_len),
4105 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST,
4106 hci_cc_le_add_to_resolv_list),
4107 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST,
4108 hci_cc_le_del_from_resolv_list),
4109 HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST,
4110 hci_cc_le_clear_resolv_list),
4111 HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size,
4112 sizeof(struct hci_rp_le_read_resolv_list_size)),
4113 HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
4114 hci_cc_le_set_addr_resolution_enable),
4115 HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len,
4116 sizeof(struct hci_rp_le_read_max_data_len)),
4117 HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED,
4118 hci_cc_write_le_host_supported),
4119 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param),
4120 HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi,
4121 sizeof(struct hci_rp_read_rssi)),
4122 HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power,
4123 sizeof(struct hci_rp_read_tx_power)),
4124 HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode),
4125 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS,
4126 hci_cc_le_set_ext_scan_param),
4127 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE,
4128 hci_cc_le_set_ext_scan_enable),
4129 HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy),
4130 HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4131 hci_cc_le_read_num_adv_sets,
4132 sizeof(struct hci_rp_le_read_num_supported_adv_sets)),
4133 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE,
4134 hci_cc_le_set_ext_adv_enable),
4135 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
4136 hci_cc_le_set_adv_set_random_addr),
4137 HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set),
4138 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets),
4139 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param),
4140 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE,
4141 hci_cc_le_set_per_adv_enable),
4142 HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power,
4143 sizeof(struct hci_rp_le_read_transmit_power)),
4144 HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode),
4145 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2,
4146 sizeof(struct hci_rp_le_read_buffer_size_v2)),
4147 HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params,
4148 sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE),
4149 HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path,
4150 sizeof(struct hci_rp_le_setup_iso_path)),
4151 };
4152
hci_cc_func(struct hci_dev * hdev,const struct hci_cc * cc,struct sk_buff * skb)4153 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc,
4154 struct sk_buff *skb)
4155 {
4156 void *data;
4157
4158 if (skb->len < cc->min_len) {
4159 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u",
4160 cc->op, skb->len, cc->min_len);
4161 return HCI_ERROR_UNSPECIFIED;
4162 }
4163
4164 /* Just warn if the length is over max_len size it still be possible to
4165 * partially parse the cc so leave to callback to decide if that is
4166 * acceptable.
4167 */
4168 if (skb->len > cc->max_len)
4169 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u",
4170 cc->op, skb->len, cc->max_len);
4171
4172 data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len);
4173 if (!data)
4174 return HCI_ERROR_UNSPECIFIED;
4175
4176 return cc->func(hdev, data, skb);
4177 }
4178
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)4179 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
4180 struct sk_buff *skb, u16 *opcode, u8 *status,
4181 hci_req_complete_t *req_complete,
4182 hci_req_complete_skb_t *req_complete_skb)
4183 {
4184 struct hci_ev_cmd_complete *ev = data;
4185 int i;
4186
4187 *opcode = __le16_to_cpu(ev->opcode);
4188
4189 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4190
4191 for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) {
4192 if (hci_cc_table[i].op == *opcode) {
4193 *status = hci_cc_func(hdev, &hci_cc_table[i], skb);
4194 break;
4195 }
4196 }
4197
4198 if (i == ARRAY_SIZE(hci_cc_table)) {
4199 /* Unknown opcode, assume byte 0 contains the status, so
4200 * that e.g. __hci_cmd_sync() properly returns errors
4201 * for vendor specific commands send by HCI drivers.
4202 * If a vendor doesn't actually follow this convention we may
4203 * need to introduce a vendor CC table in order to properly set
4204 * the status.
4205 */
4206 *status = skb->data[0];
4207 }
4208
4209 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4210
4211 hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
4212 req_complete_skb);
4213
4214 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4215 bt_dev_err(hdev,
4216 "unexpected event for opcode 0x%4.4x", *opcode);
4217 return;
4218 }
4219
4220 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4221 queue_work(hdev->workqueue, &hdev->cmd_work);
4222 }
4223
hci_cs_le_create_cis(struct hci_dev * hdev,u8 status)4224 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
4225 {
4226 struct hci_cp_le_create_cis *cp;
4227 bool pending = false;
4228 int i;
4229
4230 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4231
4232 if (!status)
4233 return;
4234
4235 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
4236 if (!cp)
4237 return;
4238
4239 hci_dev_lock(hdev);
4240
4241 /* Remove connection if command failed */
4242 for (i = 0; i < cp->num_cis; i++) {
4243 struct hci_conn *conn;
4244 u16 handle;
4245
4246 handle = __le16_to_cpu(cp->cis[i].cis_handle);
4247
4248 conn = hci_conn_hash_lookup_handle(hdev, handle);
4249 if (conn) {
4250 if (test_and_clear_bit(HCI_CONN_CREATE_CIS,
4251 &conn->flags))
4252 pending = true;
4253 conn->state = BT_CLOSED;
4254 hci_connect_cfm(conn, status);
4255 hci_conn_del(conn);
4256 }
4257 }
4258 cp->num_cis = 0;
4259
4260 if (pending)
4261 hci_le_create_cis_pending(hdev);
4262
4263 hci_dev_unlock(hdev);
4264 }
4265
4266 #define HCI_CS(_op, _func) \
4267 { \
4268 .op = _op, \
4269 .func = _func, \
4270 }
4271
4272 static const struct hci_cs {
4273 u16 op;
4274 void (*func)(struct hci_dev *hdev, __u8 status);
4275 } hci_cs_table[] = {
4276 HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry),
4277 HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn),
4278 HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect),
4279 HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco),
4280 HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested),
4281 HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt),
4282 HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req),
4283 HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features),
4284 HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES,
4285 hci_cs_read_remote_ext_features),
4286 HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn),
4287 HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN,
4288 hci_cs_enhanced_setup_sync_conn),
4289 HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode),
4290 HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode),
4291 HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role),
4292 HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn),
4293 HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features),
4294 HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc),
4295 HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn),
4296 HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis),
4297 HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big),
4298 };
4299
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)4300 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data,
4301 struct sk_buff *skb, u16 *opcode, u8 *status,
4302 hci_req_complete_t *req_complete,
4303 hci_req_complete_skb_t *req_complete_skb)
4304 {
4305 struct hci_ev_cmd_status *ev = data;
4306 int i;
4307
4308 *opcode = __le16_to_cpu(ev->opcode);
4309 *status = ev->status;
4310
4311 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4312
4313 for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) {
4314 if (hci_cs_table[i].op == *opcode) {
4315 hci_cs_table[i].func(hdev, ev->status);
4316 break;
4317 }
4318 }
4319
4320 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4321
4322 /* Indicate request completion if the command failed. Also, if
4323 * we're not waiting for a special event and we get a success
4324 * command status we should try to flag the request as completed
4325 * (since for this kind of commands there will not be a command
4326 * complete event).
4327 */
4328 if (ev->status || (hdev->req_skb && !hci_skb_event(hdev->req_skb))) {
4329 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
4330 req_complete_skb);
4331 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4332 bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x",
4333 *opcode);
4334 return;
4335 }
4336 }
4337
4338 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4339 queue_work(hdev->workqueue, &hdev->cmd_work);
4340 }
4341
hci_hardware_error_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4342 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data,
4343 struct sk_buff *skb)
4344 {
4345 struct hci_ev_hardware_error *ev = data;
4346
4347 bt_dev_dbg(hdev, "code 0x%2.2x", ev->code);
4348
4349 hdev->hw_error_code = ev->code;
4350
4351 queue_work(hdev->req_workqueue, &hdev->error_reset);
4352 }
4353
hci_role_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4354 static void hci_role_change_evt(struct hci_dev *hdev, void *data,
4355 struct sk_buff *skb)
4356 {
4357 struct hci_ev_role_change *ev = data;
4358 struct hci_conn *conn;
4359
4360 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4361
4362 hci_dev_lock(hdev);
4363
4364 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4365 if (conn) {
4366 if (!ev->status)
4367 conn->role = ev->role;
4368
4369 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
4370
4371 hci_role_switch_cfm(conn, ev->status, ev->role);
4372 }
4373
4374 hci_dev_unlock(hdev);
4375 }
4376
hci_num_comp_pkts_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4377 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data,
4378 struct sk_buff *skb)
4379 {
4380 struct hci_ev_num_comp_pkts *ev = data;
4381 int i;
4382
4383 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS,
4384 flex_array_size(ev, handles, ev->num)))
4385 return;
4386
4387 bt_dev_dbg(hdev, "num %d", ev->num);
4388
4389 for (i = 0; i < ev->num; i++) {
4390 struct hci_comp_pkts_info *info = &ev->handles[i];
4391 struct hci_conn *conn;
4392 __u16 handle, count;
4393 unsigned int i;
4394
4395 handle = __le16_to_cpu(info->handle);
4396 count = __le16_to_cpu(info->count);
4397
4398 conn = hci_conn_hash_lookup_handle(hdev, handle);
4399 if (!conn)
4400 continue;
4401
4402 conn->sent -= count;
4403
4404 for (i = 0; i < count; ++i)
4405 hci_conn_tx_dequeue(conn);
4406
4407 switch (conn->type) {
4408 case ACL_LINK:
4409 hdev->acl_cnt += count;
4410 if (hdev->acl_cnt > hdev->acl_pkts)
4411 hdev->acl_cnt = hdev->acl_pkts;
4412 break;
4413
4414 case LE_LINK:
4415 if (hdev->le_pkts) {
4416 hdev->le_cnt += count;
4417 if (hdev->le_cnt > hdev->le_pkts)
4418 hdev->le_cnt = hdev->le_pkts;
4419 } else {
4420 hdev->acl_cnt += count;
4421 if (hdev->acl_cnt > hdev->acl_pkts)
4422 hdev->acl_cnt = hdev->acl_pkts;
4423 }
4424 break;
4425
4426 case SCO_LINK:
4427 case ESCO_LINK:
4428 hdev->sco_cnt += count;
4429 if (hdev->sco_cnt > hdev->sco_pkts)
4430 hdev->sco_cnt = hdev->sco_pkts;
4431
4432 break;
4433
4434 case CIS_LINK:
4435 case BIS_LINK:
4436 if (hdev->iso_pkts) {
4437 hdev->iso_cnt += count;
4438 if (hdev->iso_cnt > hdev->iso_pkts)
4439 hdev->iso_cnt = hdev->iso_pkts;
4440 } else if (hdev->le_pkts) {
4441 hdev->le_cnt += count;
4442 if (hdev->le_cnt > hdev->le_pkts)
4443 hdev->le_cnt = hdev->le_pkts;
4444 } else {
4445 hdev->acl_cnt += count;
4446 if (hdev->acl_cnt > hdev->acl_pkts)
4447 hdev->acl_cnt = hdev->acl_pkts;
4448 }
4449 break;
4450
4451 default:
4452 bt_dev_err(hdev, "unknown type %d conn %p",
4453 conn->type, conn);
4454 break;
4455 }
4456 }
4457
4458 queue_work(hdev->workqueue, &hdev->tx_work);
4459 }
4460
hci_mode_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4461 static void hci_mode_change_evt(struct hci_dev *hdev, void *data,
4462 struct sk_buff *skb)
4463 {
4464 struct hci_ev_mode_change *ev = data;
4465 struct hci_conn *conn;
4466
4467 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4468
4469 hci_dev_lock(hdev);
4470
4471 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4472 if (conn) {
4473 conn->mode = ev->mode;
4474
4475 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
4476 &conn->flags)) {
4477 if (conn->mode == HCI_CM_ACTIVE)
4478 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4479 else
4480 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4481 }
4482
4483 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
4484 hci_sco_setup(conn, ev->status);
4485 }
4486
4487 hci_dev_unlock(hdev);
4488 }
4489
hci_pin_code_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4490 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data,
4491 struct sk_buff *skb)
4492 {
4493 struct hci_ev_pin_code_req *ev = data;
4494 struct hci_conn *conn;
4495
4496 bt_dev_dbg(hdev, "");
4497
4498 hci_dev_lock(hdev);
4499
4500 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4501 if (!conn)
4502 goto unlock;
4503
4504 if (conn->state == BT_CONNECTED) {
4505 hci_conn_hold(conn);
4506 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
4507 hci_conn_drop(conn);
4508 }
4509
4510 if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
4511 !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
4512 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
4513 sizeof(ev->bdaddr), &ev->bdaddr);
4514 } else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4515 u8 secure;
4516
4517 if (conn->pending_sec_level == BT_SECURITY_HIGH)
4518 secure = 1;
4519 else
4520 secure = 0;
4521
4522 mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
4523 }
4524
4525 unlock:
4526 hci_dev_unlock(hdev);
4527 }
4528
conn_set_key(struct hci_conn * conn,u8 key_type,u8 pin_len)4529 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
4530 {
4531 if (key_type == HCI_LK_CHANGED_COMBINATION)
4532 return;
4533
4534 conn->pin_length = pin_len;
4535 conn->key_type = key_type;
4536
4537 switch (key_type) {
4538 case HCI_LK_LOCAL_UNIT:
4539 case HCI_LK_REMOTE_UNIT:
4540 case HCI_LK_DEBUG_COMBINATION:
4541 return;
4542 case HCI_LK_COMBINATION:
4543 if (pin_len == 16)
4544 conn->pending_sec_level = BT_SECURITY_HIGH;
4545 else
4546 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4547 break;
4548 case HCI_LK_UNAUTH_COMBINATION_P192:
4549 case HCI_LK_UNAUTH_COMBINATION_P256:
4550 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4551 break;
4552 case HCI_LK_AUTH_COMBINATION_P192:
4553 conn->pending_sec_level = BT_SECURITY_HIGH;
4554 break;
4555 case HCI_LK_AUTH_COMBINATION_P256:
4556 conn->pending_sec_level = BT_SECURITY_FIPS;
4557 break;
4558 }
4559 }
4560
hci_link_key_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4561 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data,
4562 struct sk_buff *skb)
4563 {
4564 struct hci_ev_link_key_req *ev = data;
4565 struct hci_cp_link_key_reply cp;
4566 struct hci_conn *conn;
4567 struct link_key *key;
4568
4569 bt_dev_dbg(hdev, "");
4570
4571 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4572 return;
4573
4574 hci_dev_lock(hdev);
4575
4576 key = hci_find_link_key(hdev, &ev->bdaddr);
4577 if (!key) {
4578 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr);
4579 goto not_found;
4580 }
4581
4582 bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr);
4583
4584 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4585 if (conn) {
4586 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4587
4588 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
4589 key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
4590 conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
4591 bt_dev_dbg(hdev, "ignoring unauthenticated key");
4592 goto not_found;
4593 }
4594
4595 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
4596 (conn->pending_sec_level == BT_SECURITY_HIGH ||
4597 conn->pending_sec_level == BT_SECURITY_FIPS)) {
4598 bt_dev_dbg(hdev, "ignoring key unauthenticated for high security");
4599 goto not_found;
4600 }
4601
4602 conn_set_key(conn, key->type, key->pin_len);
4603 }
4604
4605 bacpy(&cp.bdaddr, &ev->bdaddr);
4606 memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
4607
4608 hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
4609
4610 hci_dev_unlock(hdev);
4611
4612 return;
4613
4614 not_found:
4615 hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
4616 hci_dev_unlock(hdev);
4617 }
4618
hci_link_key_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4619 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data,
4620 struct sk_buff *skb)
4621 {
4622 struct hci_ev_link_key_notify *ev = data;
4623 struct hci_conn *conn;
4624 struct link_key *key;
4625 bool persistent;
4626 u8 pin_len = 0;
4627
4628 bt_dev_dbg(hdev, "");
4629
4630 hci_dev_lock(hdev);
4631
4632 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4633 if (!conn)
4634 goto unlock;
4635
4636 /* Ignore NULL link key against CVE-2020-26555 */
4637 if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
4638 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
4639 &ev->bdaddr);
4640 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
4641 hci_conn_drop(conn);
4642 goto unlock;
4643 }
4644
4645 hci_conn_hold(conn);
4646 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
4647 hci_conn_drop(conn);
4648
4649 set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4650 conn_set_key(conn, ev->key_type, conn->pin_length);
4651
4652 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4653 goto unlock;
4654
4655 key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
4656 ev->key_type, pin_len, &persistent);
4657 if (!key)
4658 goto unlock;
4659
4660 /* Update connection information since adding the key will have
4661 * fixed up the type in the case of changed combination keys.
4662 */
4663 if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
4664 conn_set_key(conn, key->type, key->pin_len);
4665
4666 mgmt_new_link_key(hdev, key, persistent);
4667
4668 /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
4669 * is set. If it's not set simply remove the key from the kernel
4670 * list (we've still notified user space about it but with
4671 * store_hint being 0).
4672 */
4673 if (key->type == HCI_LK_DEBUG_COMBINATION &&
4674 !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
4675 list_del_rcu(&key->list);
4676 kfree_rcu(key, rcu);
4677 goto unlock;
4678 }
4679
4680 if (persistent)
4681 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4682 else
4683 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4684
4685 unlock:
4686 hci_dev_unlock(hdev);
4687 }
4688
hci_clock_offset_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4689 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data,
4690 struct sk_buff *skb)
4691 {
4692 struct hci_ev_clock_offset *ev = data;
4693 struct hci_conn *conn;
4694
4695 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4696
4697 hci_dev_lock(hdev);
4698
4699 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4700 if (conn && !ev->status) {
4701 struct inquiry_entry *ie;
4702
4703 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4704 if (ie) {
4705 ie->data.clock_offset = ev->clock_offset;
4706 ie->timestamp = jiffies;
4707 }
4708 }
4709
4710 hci_dev_unlock(hdev);
4711 }
4712
hci_pkt_type_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4713 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data,
4714 struct sk_buff *skb)
4715 {
4716 struct hci_ev_pkt_type_change *ev = data;
4717 struct hci_conn *conn;
4718
4719 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4720
4721 hci_dev_lock(hdev);
4722
4723 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4724 if (conn && !ev->status)
4725 conn->pkt_type = __le16_to_cpu(ev->pkt_type);
4726
4727 hci_dev_unlock(hdev);
4728 }
4729
hci_pscan_rep_mode_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4730 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data,
4731 struct sk_buff *skb)
4732 {
4733 struct hci_ev_pscan_rep_mode *ev = data;
4734 struct inquiry_entry *ie;
4735
4736 bt_dev_dbg(hdev, "");
4737
4738 hci_dev_lock(hdev);
4739
4740 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
4741 if (ie) {
4742 ie->data.pscan_rep_mode = ev->pscan_rep_mode;
4743 ie->timestamp = jiffies;
4744 }
4745
4746 hci_dev_unlock(hdev);
4747 }
4748
hci_inquiry_result_with_rssi_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)4749 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
4750 struct sk_buff *skb)
4751 {
4752 struct hci_ev_inquiry_result_rssi *ev = edata;
4753 struct inquiry_data data;
4754 int i;
4755
4756 bt_dev_dbg(hdev, "num_rsp %d", ev->num);
4757
4758 if (!ev->num)
4759 return;
4760
4761 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
4762 return;
4763
4764 hci_dev_lock(hdev);
4765
4766 if (skb->len == array_size(ev->num,
4767 sizeof(struct inquiry_info_rssi_pscan))) {
4768 struct inquiry_info_rssi_pscan *info;
4769
4770 for (i = 0; i < ev->num; i++) {
4771 u32 flags;
4772
4773 info = hci_ev_skb_pull(hdev, skb,
4774 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4775 sizeof(*info));
4776 if (!info) {
4777 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4778 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4779 goto unlock;
4780 }
4781
4782 bacpy(&data.bdaddr, &info->bdaddr);
4783 data.pscan_rep_mode = info->pscan_rep_mode;
4784 data.pscan_period_mode = info->pscan_period_mode;
4785 data.pscan_mode = info->pscan_mode;
4786 memcpy(data.dev_class, info->dev_class, 3);
4787 data.clock_offset = info->clock_offset;
4788 data.rssi = info->rssi;
4789 data.ssp_mode = 0x00;
4790
4791 flags = hci_inquiry_cache_update(hdev, &data, false);
4792
4793 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4794 info->dev_class, info->rssi,
4795 flags, NULL, 0, NULL, 0, 0);
4796 }
4797 } else if (skb->len == array_size(ev->num,
4798 sizeof(struct inquiry_info_rssi))) {
4799 struct inquiry_info_rssi *info;
4800
4801 for (i = 0; i < ev->num; i++) {
4802 u32 flags;
4803
4804 info = hci_ev_skb_pull(hdev, skb,
4805 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4806 sizeof(*info));
4807 if (!info) {
4808 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4809 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4810 goto unlock;
4811 }
4812
4813 bacpy(&data.bdaddr, &info->bdaddr);
4814 data.pscan_rep_mode = info->pscan_rep_mode;
4815 data.pscan_period_mode = info->pscan_period_mode;
4816 data.pscan_mode = 0x00;
4817 memcpy(data.dev_class, info->dev_class, 3);
4818 data.clock_offset = info->clock_offset;
4819 data.rssi = info->rssi;
4820 data.ssp_mode = 0x00;
4821
4822 flags = hci_inquiry_cache_update(hdev, &data, false);
4823
4824 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4825 info->dev_class, info->rssi,
4826 flags, NULL, 0, NULL, 0, 0);
4827 }
4828 } else {
4829 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4830 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4831 }
4832 unlock:
4833 hci_dev_unlock(hdev);
4834 }
4835
hci_remote_ext_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4836 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data,
4837 struct sk_buff *skb)
4838 {
4839 struct hci_ev_remote_ext_features *ev = data;
4840 struct hci_conn *conn;
4841
4842 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4843
4844 hci_dev_lock(hdev);
4845
4846 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4847 if (!conn)
4848 goto unlock;
4849
4850 if (ev->page < HCI_MAX_PAGES)
4851 memcpy(conn->features[ev->page], ev->features, 8);
4852
4853 if (!ev->status && ev->page == 0x01) {
4854 struct inquiry_entry *ie;
4855
4856 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4857 if (ie)
4858 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4859
4860 if (ev->features[0] & LMP_HOST_SSP) {
4861 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4862 } else {
4863 /* It is mandatory by the Bluetooth specification that
4864 * Extended Inquiry Results are only used when Secure
4865 * Simple Pairing is enabled, but some devices violate
4866 * this.
4867 *
4868 * To make these devices work, the internal SSP
4869 * enabled flag needs to be cleared if the remote host
4870 * features do not indicate SSP support */
4871 clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4872 }
4873
4874 if (ev->features[0] & LMP_HOST_SC)
4875 set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
4876 }
4877
4878 if (conn->state != BT_CONFIG)
4879 goto unlock;
4880
4881 if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
4882 struct hci_cp_remote_name_req cp;
4883 memset(&cp, 0, sizeof(cp));
4884 bacpy(&cp.bdaddr, &conn->dst);
4885 cp.pscan_rep_mode = 0x02;
4886 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
4887 } else {
4888 mgmt_device_connected(hdev, conn, NULL, 0);
4889 }
4890
4891 if (!hci_outgoing_auth_needed(hdev, conn)) {
4892 conn->state = BT_CONNECTED;
4893 hci_connect_cfm(conn, ev->status);
4894 hci_conn_drop(conn);
4895 }
4896
4897 unlock:
4898 hci_dev_unlock(hdev);
4899 }
4900
hci_sync_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4901 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
4902 struct sk_buff *skb)
4903 {
4904 struct hci_ev_sync_conn_complete *ev = data;
4905 struct hci_conn *conn;
4906 u8 status = ev->status;
4907
4908 switch (ev->link_type) {
4909 case SCO_LINK:
4910 case ESCO_LINK:
4911 break;
4912 default:
4913 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
4914 * for HCI_Synchronous_Connection_Complete is limited to
4915 * either SCO or eSCO
4916 */
4917 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
4918 return;
4919 }
4920
4921 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4922
4923 hci_dev_lock(hdev);
4924
4925 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
4926 if (!conn) {
4927 if (ev->link_type == ESCO_LINK)
4928 goto unlock;
4929
4930 /* When the link type in the event indicates SCO connection
4931 * and lookup of the connection object fails, then check
4932 * if an eSCO connection object exists.
4933 *
4934 * The core limits the synchronous connections to either
4935 * SCO or eSCO. The eSCO connection is preferred and tried
4936 * to be setup first and until successfully established,
4937 * the link type will be hinted as eSCO.
4938 */
4939 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
4940 if (!conn)
4941 goto unlock;
4942 }
4943
4944 /* The HCI_Synchronous_Connection_Complete event is only sent once per connection.
4945 * Processing it more than once per connection can corrupt kernel memory.
4946 *
4947 * As the connection handle is set here for the first time, it indicates
4948 * whether the connection is already set up.
4949 */
4950 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
4951 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection");
4952 goto unlock;
4953 }
4954
4955 switch (status) {
4956 case 0x00:
4957 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
4958 if (status) {
4959 conn->state = BT_CLOSED;
4960 break;
4961 }
4962
4963 conn->state = BT_CONNECTED;
4964 conn->type = ev->link_type;
4965
4966 hci_debugfs_create_conn(conn);
4967 hci_conn_add_sysfs(conn);
4968 break;
4969
4970 case 0x10: /* Connection Accept Timeout */
4971 case 0x0d: /* Connection Rejected due to Limited Resources */
4972 case 0x11: /* Unsupported Feature or Parameter Value */
4973 case 0x1c: /* SCO interval rejected */
4974 case 0x1a: /* Unsupported Remote Feature */
4975 case 0x1e: /* Invalid LMP Parameters */
4976 case 0x1f: /* Unspecified error */
4977 case 0x20: /* Unsupported LMP Parameter value */
4978 if (conn->out) {
4979 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
4980 (hdev->esco_type & EDR_ESCO_MASK);
4981 if (hci_setup_sync(conn, conn->parent->handle))
4982 goto unlock;
4983 }
4984 fallthrough;
4985
4986 default:
4987 conn->state = BT_CLOSED;
4988 break;
4989 }
4990
4991 bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode);
4992 /* Notify only in case of SCO over HCI transport data path which
4993 * is zero and non-zero value shall be non-HCI transport data path
4994 */
4995 if (conn->codec.data_path == 0 && hdev->notify) {
4996 switch (ev->air_mode) {
4997 case 0x02:
4998 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
4999 break;
5000 case 0x03:
5001 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP);
5002 break;
5003 }
5004 }
5005
5006 hci_connect_cfm(conn, status);
5007 if (status)
5008 hci_conn_del(conn);
5009
5010 unlock:
5011 hci_dev_unlock(hdev);
5012 }
5013
eir_get_length(u8 * eir,size_t eir_len)5014 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
5015 {
5016 size_t parsed = 0;
5017
5018 while (parsed < eir_len) {
5019 u8 field_len = eir[0];
5020
5021 if (field_len == 0)
5022 return parsed;
5023
5024 parsed += field_len + 1;
5025 eir += field_len + 1;
5026 }
5027
5028 return eir_len;
5029 }
5030
hci_extended_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5031 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata,
5032 struct sk_buff *skb)
5033 {
5034 struct hci_ev_ext_inquiry_result *ev = edata;
5035 struct inquiry_data data;
5036 size_t eir_len;
5037 int i;
5038
5039 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT,
5040 flex_array_size(ev, info, ev->num)))
5041 return;
5042
5043 bt_dev_dbg(hdev, "num %d", ev->num);
5044
5045 if (!ev->num)
5046 return;
5047
5048 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
5049 return;
5050
5051 hci_dev_lock(hdev);
5052
5053 for (i = 0; i < ev->num; i++) {
5054 struct extended_inquiry_info *info = &ev->info[i];
5055 u32 flags;
5056 bool name_known;
5057
5058 bacpy(&data.bdaddr, &info->bdaddr);
5059 data.pscan_rep_mode = info->pscan_rep_mode;
5060 data.pscan_period_mode = info->pscan_period_mode;
5061 data.pscan_mode = 0x00;
5062 memcpy(data.dev_class, info->dev_class, 3);
5063 data.clock_offset = info->clock_offset;
5064 data.rssi = info->rssi;
5065 data.ssp_mode = 0x01;
5066
5067 if (hci_dev_test_flag(hdev, HCI_MGMT))
5068 name_known = eir_get_data(info->data,
5069 sizeof(info->data),
5070 EIR_NAME_COMPLETE, NULL);
5071 else
5072 name_known = true;
5073
5074 flags = hci_inquiry_cache_update(hdev, &data, name_known);
5075
5076 eir_len = eir_get_length(info->data, sizeof(info->data));
5077
5078 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
5079 info->dev_class, info->rssi,
5080 flags, info->data, eir_len, NULL, 0, 0);
5081 }
5082
5083 hci_dev_unlock(hdev);
5084 }
5085
hci_key_refresh_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5086 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data,
5087 struct sk_buff *skb)
5088 {
5089 struct hci_ev_key_refresh_complete *ev = data;
5090 struct hci_conn *conn;
5091
5092 bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status,
5093 __le16_to_cpu(ev->handle));
5094
5095 hci_dev_lock(hdev);
5096
5097 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5098 if (!conn)
5099 goto unlock;
5100
5101 /* For BR/EDR the necessary steps are taken through the
5102 * auth_complete event.
5103 */
5104 if (conn->type != LE_LINK)
5105 goto unlock;
5106
5107 if (!ev->status)
5108 conn->sec_level = conn->pending_sec_level;
5109
5110 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
5111
5112 if (ev->status && conn->state == BT_CONNECTED) {
5113 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
5114 hci_conn_drop(conn);
5115 goto unlock;
5116 }
5117
5118 if (conn->state == BT_CONFIG) {
5119 if (!ev->status)
5120 conn->state = BT_CONNECTED;
5121
5122 hci_connect_cfm(conn, ev->status);
5123 hci_conn_drop(conn);
5124 } else {
5125 hci_auth_cfm(conn, ev->status);
5126
5127 hci_conn_hold(conn);
5128 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
5129 hci_conn_drop(conn);
5130 }
5131
5132 unlock:
5133 hci_dev_unlock(hdev);
5134 }
5135
hci_get_auth_req(struct hci_conn * conn)5136 static u8 hci_get_auth_req(struct hci_conn *conn)
5137 {
5138 /* If remote requests no-bonding follow that lead */
5139 if (conn->remote_auth == HCI_AT_NO_BONDING ||
5140 conn->remote_auth == HCI_AT_NO_BONDING_MITM)
5141 return conn->remote_auth | (conn->auth_type & 0x01);
5142
5143 /* If both remote and local have enough IO capabilities, require
5144 * MITM protection
5145 */
5146 if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
5147 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
5148 return conn->remote_auth | 0x01;
5149
5150 /* No MITM protection possible so ignore remote requirement */
5151 return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
5152 }
5153
bredr_oob_data_present(struct hci_conn * conn)5154 static u8 bredr_oob_data_present(struct hci_conn *conn)
5155 {
5156 struct hci_dev *hdev = conn->hdev;
5157 struct oob_data *data;
5158
5159 data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
5160 if (!data)
5161 return 0x00;
5162
5163 if (bredr_sc_enabled(hdev)) {
5164 /* When Secure Connections is enabled, then just
5165 * return the present value stored with the OOB
5166 * data. The stored value contains the right present
5167 * information. However it can only be trusted when
5168 * not in Secure Connection Only mode.
5169 */
5170 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
5171 return data->present;
5172
5173 /* When Secure Connections Only mode is enabled, then
5174 * the P-256 values are required. If they are not
5175 * available, then do not declare that OOB data is
5176 * present.
5177 */
5178 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
5179 !crypto_memneq(data->hash256, ZERO_KEY, 16))
5180 return 0x00;
5181
5182 return 0x02;
5183 }
5184
5185 /* When Secure Connections is not enabled or actually
5186 * not supported by the hardware, then check that if
5187 * P-192 data values are present.
5188 */
5189 if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
5190 !crypto_memneq(data->hash192, ZERO_KEY, 16))
5191 return 0x00;
5192
5193 return 0x01;
5194 }
5195
hci_io_capa_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5196 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data,
5197 struct sk_buff *skb)
5198 {
5199 struct hci_ev_io_capa_request *ev = data;
5200 struct hci_conn *conn;
5201
5202 bt_dev_dbg(hdev, "");
5203
5204 hci_dev_lock(hdev);
5205
5206 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5207 if (!conn || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
5208 goto unlock;
5209
5210 /* Assume remote supports SSP since it has triggered this event */
5211 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
5212
5213 hci_conn_hold(conn);
5214
5215 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5216 goto unlock;
5217
5218 /* Allow pairing if we're pairable, the initiators of the
5219 * pairing or if the remote is not requesting bonding.
5220 */
5221 if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
5222 test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
5223 (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
5224 struct hci_cp_io_capability_reply cp;
5225
5226 bacpy(&cp.bdaddr, &ev->bdaddr);
5227 /* Change the IO capability from KeyboardDisplay
5228 * to DisplayYesNo as it is not supported by BT spec. */
5229 cp.capability = (conn->io_capability == 0x04) ?
5230 HCI_IO_DISPLAY_YESNO : conn->io_capability;
5231
5232 /* If we are initiators, there is no remote information yet */
5233 if (conn->remote_auth == 0xff) {
5234 /* Request MITM protection if our IO caps allow it
5235 * except for the no-bonding case.
5236 */
5237 if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5238 conn->auth_type != HCI_AT_NO_BONDING)
5239 conn->auth_type |= 0x01;
5240 } else {
5241 conn->auth_type = hci_get_auth_req(conn);
5242 }
5243
5244 /* If we're not bondable, force one of the non-bondable
5245 * authentication requirement values.
5246 */
5247 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
5248 conn->auth_type &= HCI_AT_NO_BONDING_MITM;
5249
5250 cp.authentication = conn->auth_type;
5251 cp.oob_data = bredr_oob_data_present(conn);
5252
5253 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
5254 sizeof(cp), &cp);
5255 } else {
5256 struct hci_cp_io_capability_neg_reply cp;
5257
5258 bacpy(&cp.bdaddr, &ev->bdaddr);
5259 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
5260
5261 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
5262 sizeof(cp), &cp);
5263 }
5264
5265 unlock:
5266 hci_dev_unlock(hdev);
5267 }
5268
hci_io_capa_reply_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5269 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data,
5270 struct sk_buff *skb)
5271 {
5272 struct hci_ev_io_capa_reply *ev = data;
5273 struct hci_conn *conn;
5274
5275 bt_dev_dbg(hdev, "");
5276
5277 hci_dev_lock(hdev);
5278
5279 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5280 if (!conn)
5281 goto unlock;
5282
5283 conn->remote_cap = ev->capability;
5284 conn->remote_auth = ev->authentication;
5285
5286 unlock:
5287 hci_dev_unlock(hdev);
5288 }
5289
hci_user_confirm_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5290 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data,
5291 struct sk_buff *skb)
5292 {
5293 struct hci_ev_user_confirm_req *ev = data;
5294 int loc_mitm, rem_mitm, confirm_hint = 0;
5295 struct hci_conn *conn;
5296
5297 bt_dev_dbg(hdev, "");
5298
5299 hci_dev_lock(hdev);
5300
5301 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5302 goto unlock;
5303
5304 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5305 if (!conn)
5306 goto unlock;
5307
5308 loc_mitm = (conn->auth_type & 0x01);
5309 rem_mitm = (conn->remote_auth & 0x01);
5310
5311 /* If we require MITM but the remote device can't provide that
5312 * (it has NoInputNoOutput) then reject the confirmation
5313 * request. We check the security level here since it doesn't
5314 * necessarily match conn->auth_type.
5315 */
5316 if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
5317 conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
5318 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM");
5319 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
5320 sizeof(ev->bdaddr), &ev->bdaddr);
5321 goto unlock;
5322 }
5323
5324 /* If no side requires MITM protection; use JUST_CFM method */
5325 if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
5326 (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
5327
5328 /* If we're not the initiator of request authorization and the
5329 * local IO capability is not NoInputNoOutput, use JUST_WORKS
5330 * method (mgmt_user_confirm with confirm_hint set to 1).
5331 */
5332 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5333 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) {
5334 bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5335 confirm_hint = 1;
5336 goto confirm;
5337 }
5338
5339 /* If there already exists link key in local host, leave the
5340 * decision to user space since the remote device could be
5341 * legitimate or malicious.
5342 */
5343 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5344 bt_dev_dbg(hdev, "Local host already has link key");
5345 confirm_hint = 1;
5346 goto confirm;
5347 }
5348
5349 BT_DBG("Auto-accept of user confirmation with %ums delay",
5350 hdev->auto_accept_delay);
5351
5352 if (hdev->auto_accept_delay > 0) {
5353 int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5354 queue_delayed_work(conn->hdev->workqueue,
5355 &conn->auto_accept_work, delay);
5356 goto unlock;
5357 }
5358
5359 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5360 sizeof(ev->bdaddr), &ev->bdaddr);
5361 goto unlock;
5362 }
5363
5364 confirm:
5365 mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5366 le32_to_cpu(ev->passkey), confirm_hint);
5367
5368 unlock:
5369 hci_dev_unlock(hdev);
5370 }
5371
hci_user_passkey_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5372 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5373 struct sk_buff *skb)
5374 {
5375 struct hci_ev_user_passkey_req *ev = data;
5376
5377 bt_dev_dbg(hdev, "");
5378
5379 if (hci_dev_test_flag(hdev, HCI_MGMT))
5380 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5381 }
5382
hci_user_passkey_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5383 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5384 struct sk_buff *skb)
5385 {
5386 struct hci_ev_user_passkey_notify *ev = data;
5387 struct hci_conn *conn;
5388
5389 bt_dev_dbg(hdev, "");
5390
5391 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5392 if (!conn)
5393 return;
5394
5395 conn->passkey_notify = __le32_to_cpu(ev->passkey);
5396 conn->passkey_entered = 0;
5397
5398 if (hci_dev_test_flag(hdev, HCI_MGMT))
5399 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5400 conn->dst_type, conn->passkey_notify,
5401 conn->passkey_entered);
5402 }
5403
hci_keypress_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5404 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5405 struct sk_buff *skb)
5406 {
5407 struct hci_ev_keypress_notify *ev = data;
5408 struct hci_conn *conn;
5409
5410 bt_dev_dbg(hdev, "");
5411
5412 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5413 if (!conn)
5414 return;
5415
5416 switch (ev->type) {
5417 case HCI_KEYPRESS_STARTED:
5418 conn->passkey_entered = 0;
5419 return;
5420
5421 case HCI_KEYPRESS_ENTERED:
5422 conn->passkey_entered++;
5423 break;
5424
5425 case HCI_KEYPRESS_ERASED:
5426 conn->passkey_entered--;
5427 break;
5428
5429 case HCI_KEYPRESS_CLEARED:
5430 conn->passkey_entered = 0;
5431 break;
5432
5433 case HCI_KEYPRESS_COMPLETED:
5434 return;
5435 }
5436
5437 if (hci_dev_test_flag(hdev, HCI_MGMT))
5438 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5439 conn->dst_type, conn->passkey_notify,
5440 conn->passkey_entered);
5441 }
5442
hci_simple_pair_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5443 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5444 struct sk_buff *skb)
5445 {
5446 struct hci_ev_simple_pair_complete *ev = data;
5447 struct hci_conn *conn;
5448
5449 bt_dev_dbg(hdev, "");
5450
5451 hci_dev_lock(hdev);
5452
5453 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5454 if (!conn || !hci_conn_ssp_enabled(conn))
5455 goto unlock;
5456
5457 /* Reset the authentication requirement to unknown */
5458 conn->remote_auth = 0xff;
5459
5460 /* To avoid duplicate auth_failed events to user space we check
5461 * the HCI_CONN_AUTH_PEND flag which will be set if we
5462 * initiated the authentication. A traditional auth_complete
5463 * event gets always produced as initiator and is also mapped to
5464 * the mgmt_auth_failed event */
5465 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5466 mgmt_auth_failed(conn, ev->status);
5467
5468 hci_conn_drop(conn);
5469
5470 unlock:
5471 hci_dev_unlock(hdev);
5472 }
5473
hci_remote_host_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5474 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5475 struct sk_buff *skb)
5476 {
5477 struct hci_ev_remote_host_features *ev = data;
5478 struct inquiry_entry *ie;
5479 struct hci_conn *conn;
5480
5481 bt_dev_dbg(hdev, "");
5482
5483 hci_dev_lock(hdev);
5484
5485 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5486 if (conn)
5487 memcpy(conn->features[1], ev->features, 8);
5488
5489 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5490 if (ie)
5491 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5492
5493 hci_dev_unlock(hdev);
5494 }
5495
hci_remote_oob_data_request_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5496 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5497 struct sk_buff *skb)
5498 {
5499 struct hci_ev_remote_oob_data_request *ev = edata;
5500 struct oob_data *data;
5501
5502 bt_dev_dbg(hdev, "");
5503
5504 hci_dev_lock(hdev);
5505
5506 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5507 goto unlock;
5508
5509 data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5510 if (!data) {
5511 struct hci_cp_remote_oob_data_neg_reply cp;
5512
5513 bacpy(&cp.bdaddr, &ev->bdaddr);
5514 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5515 sizeof(cp), &cp);
5516 goto unlock;
5517 }
5518
5519 if (bredr_sc_enabled(hdev)) {
5520 struct hci_cp_remote_oob_ext_data_reply cp;
5521
5522 bacpy(&cp.bdaddr, &ev->bdaddr);
5523 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5524 memset(cp.hash192, 0, sizeof(cp.hash192));
5525 memset(cp.rand192, 0, sizeof(cp.rand192));
5526 } else {
5527 memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5528 memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5529 }
5530 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5531 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5532
5533 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5534 sizeof(cp), &cp);
5535 } else {
5536 struct hci_cp_remote_oob_data_reply cp;
5537
5538 bacpy(&cp.bdaddr, &ev->bdaddr);
5539 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5540 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5541
5542 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5543 sizeof(cp), &cp);
5544 }
5545
5546 unlock:
5547 hci_dev_unlock(hdev);
5548 }
5549
le_conn_update_addr(struct hci_conn * conn,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * local_rpa)5550 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5551 u8 bdaddr_type, bdaddr_t *local_rpa)
5552 {
5553 if (conn->out) {
5554 conn->dst_type = bdaddr_type;
5555 conn->resp_addr_type = bdaddr_type;
5556 bacpy(&conn->resp_addr, bdaddr);
5557
5558 /* Check if the controller has set a Local RPA then it must be
5559 * used instead or hdev->rpa.
5560 */
5561 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5562 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5563 bacpy(&conn->init_addr, local_rpa);
5564 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5565 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5566 bacpy(&conn->init_addr, &conn->hdev->rpa);
5567 } else {
5568 hci_copy_identity_address(conn->hdev, &conn->init_addr,
5569 &conn->init_addr_type);
5570 }
5571 } else {
5572 conn->resp_addr_type = conn->hdev->adv_addr_type;
5573 /* Check if the controller has set a Local RPA then it must be
5574 * used instead or hdev->rpa.
5575 */
5576 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5577 conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5578 bacpy(&conn->resp_addr, local_rpa);
5579 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5580 /* In case of ext adv, resp_addr will be updated in
5581 * Adv Terminated event.
5582 */
5583 if (!ext_adv_capable(conn->hdev))
5584 bacpy(&conn->resp_addr,
5585 &conn->hdev->random_addr);
5586 } else {
5587 bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5588 }
5589
5590 conn->init_addr_type = bdaddr_type;
5591 bacpy(&conn->init_addr, bdaddr);
5592
5593 /* For incoming connections, set the default minimum
5594 * and maximum connection interval. They will be used
5595 * to check if the parameters are in range and if not
5596 * trigger the connection update procedure.
5597 */
5598 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5599 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5600 }
5601 }
5602
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)5603 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5604 bdaddr_t *bdaddr, u8 bdaddr_type,
5605 bdaddr_t *local_rpa, u8 role, u16 handle,
5606 u16 interval, u16 latency,
5607 u16 supervision_timeout)
5608 {
5609 struct hci_conn_params *params;
5610 struct hci_conn *conn;
5611 struct smp_irk *irk;
5612 u8 addr_type;
5613
5614 hci_dev_lock(hdev);
5615
5616 /* All controllers implicitly stop advertising in the event of a
5617 * connection, so ensure that the state bit is cleared.
5618 */
5619 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5620
5621 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
5622 if (!conn) {
5623 /* In case of error status and there is no connection pending
5624 * just unlock as there is nothing to cleanup.
5625 */
5626 if (status)
5627 goto unlock;
5628
5629 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
5630 if (IS_ERR(conn)) {
5631 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
5632 goto unlock;
5633 }
5634
5635 conn->dst_type = bdaddr_type;
5636
5637 /* If we didn't have a hci_conn object previously
5638 * but we're in central role this must be something
5639 * initiated using an accept list. Since accept list based
5640 * connections are not "first class citizens" we don't
5641 * have full tracking of them. Therefore, we go ahead
5642 * with a "best effort" approach of determining the
5643 * initiator address based on the HCI_PRIVACY flag.
5644 */
5645 if (conn->out) {
5646 conn->resp_addr_type = bdaddr_type;
5647 bacpy(&conn->resp_addr, bdaddr);
5648 if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5649 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5650 bacpy(&conn->init_addr, &hdev->rpa);
5651 } else {
5652 hci_copy_identity_address(hdev,
5653 &conn->init_addr,
5654 &conn->init_addr_type);
5655 }
5656 }
5657 } else {
5658 cancel_delayed_work(&conn->le_conn_timeout);
5659 }
5660
5661 /* The HCI_LE_Connection_Complete event is only sent once per connection.
5662 * Processing it more than once per connection can corrupt kernel memory.
5663 *
5664 * As the connection handle is set here for the first time, it indicates
5665 * whether the connection is already set up.
5666 */
5667 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5668 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5669 goto unlock;
5670 }
5671
5672 le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5673
5674 /* Lookup the identity address from the stored connection
5675 * address and address type.
5676 *
5677 * When establishing connections to an identity address, the
5678 * connection procedure will store the resolvable random
5679 * address first. Now if it can be converted back into the
5680 * identity address, start using the identity address from
5681 * now on.
5682 */
5683 irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5684 if (irk) {
5685 bacpy(&conn->dst, &irk->bdaddr);
5686 conn->dst_type = irk->addr_type;
5687 }
5688
5689 conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5690
5691 /* All connection failure handling is taken care of by the
5692 * hci_conn_failed function which is triggered by the HCI
5693 * request completion callbacks used for connecting.
5694 */
5695 if (status || hci_conn_set_handle(conn, handle))
5696 goto unlock;
5697
5698 /* Drop the connection if it has been aborted */
5699 if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5700 hci_conn_drop(conn);
5701 goto unlock;
5702 }
5703
5704 if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5705 addr_type = BDADDR_LE_PUBLIC;
5706 else
5707 addr_type = BDADDR_LE_RANDOM;
5708
5709 /* Drop the connection if the device is blocked */
5710 if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5711 hci_conn_drop(conn);
5712 goto unlock;
5713 }
5714
5715 mgmt_device_connected(hdev, conn, NULL, 0);
5716
5717 conn->sec_level = BT_SECURITY_LOW;
5718 conn->state = BT_CONFIG;
5719
5720 /* Store current advertising instance as connection advertising instance
5721 * when sotfware rotation is in use so it can be re-enabled when
5722 * disconnected.
5723 */
5724 if (!ext_adv_capable(hdev))
5725 conn->adv_instance = hdev->cur_adv_instance;
5726
5727 conn->le_conn_interval = interval;
5728 conn->le_conn_latency = latency;
5729 conn->le_supv_timeout = supervision_timeout;
5730
5731 hci_debugfs_create_conn(conn);
5732 hci_conn_add_sysfs(conn);
5733
5734 /* The remote features procedure is defined for central
5735 * role only. So only in case of an initiated connection
5736 * request the remote features.
5737 *
5738 * If the local controller supports peripheral-initiated features
5739 * exchange, then requesting the remote features in peripheral
5740 * role is possible. Otherwise just transition into the
5741 * connected state without requesting the remote features.
5742 */
5743 if (conn->out ||
5744 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
5745 struct hci_cp_le_read_remote_features cp;
5746
5747 cp.handle = __cpu_to_le16(conn->handle);
5748
5749 hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
5750 sizeof(cp), &cp);
5751
5752 hci_conn_hold(conn);
5753 } else {
5754 conn->state = BT_CONNECTED;
5755 hci_connect_cfm(conn, status);
5756 }
5757
5758 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
5759 conn->dst_type);
5760 if (params) {
5761 hci_pend_le_list_del_init(params);
5762 if (params->conn) {
5763 hci_conn_drop(params->conn);
5764 hci_conn_put(params->conn);
5765 params->conn = NULL;
5766 }
5767 }
5768
5769 unlock:
5770 hci_update_passive_scan(hdev);
5771 hci_dev_unlock(hdev);
5772 }
5773
hci_le_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5774 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
5775 struct sk_buff *skb)
5776 {
5777 struct hci_ev_le_conn_complete *ev = data;
5778
5779 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5780
5781 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5782 NULL, ev->role, le16_to_cpu(ev->handle),
5783 le16_to_cpu(ev->interval),
5784 le16_to_cpu(ev->latency),
5785 le16_to_cpu(ev->supervision_timeout));
5786 }
5787
hci_le_enh_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5788 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
5789 struct sk_buff *skb)
5790 {
5791 struct hci_ev_le_enh_conn_complete *ev = data;
5792
5793 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5794
5795 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5796 &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
5797 le16_to_cpu(ev->interval),
5798 le16_to_cpu(ev->latency),
5799 le16_to_cpu(ev->supervision_timeout));
5800 }
5801
hci_le_ext_adv_term_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5802 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
5803 struct sk_buff *skb)
5804 {
5805 struct hci_evt_le_ext_adv_set_term *ev = data;
5806 struct hci_conn *conn;
5807 struct adv_info *adv, *n;
5808
5809 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5810
5811 /* The Bluetooth Core 5.3 specification clearly states that this event
5812 * shall not be sent when the Host disables the advertising set. So in
5813 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
5814 *
5815 * When the Host disables an advertising set, all cleanup is done via
5816 * its command callback and not needed to be duplicated here.
5817 */
5818 if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
5819 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
5820 return;
5821 }
5822
5823 hci_dev_lock(hdev);
5824
5825 adv = hci_find_adv_instance(hdev, ev->handle);
5826
5827 if (ev->status) {
5828 if (!adv)
5829 goto unlock;
5830
5831 /* Remove advertising as it has been terminated */
5832 hci_remove_adv_instance(hdev, ev->handle);
5833 mgmt_advertising_removed(NULL, hdev, ev->handle);
5834
5835 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
5836 if (adv->enabled)
5837 goto unlock;
5838 }
5839
5840 /* We are no longer advertising, clear HCI_LE_ADV */
5841 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5842 goto unlock;
5843 }
5844
5845 if (adv)
5846 adv->enabled = false;
5847
5848 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
5849 if (conn) {
5850 /* Store handle in the connection so the correct advertising
5851 * instance can be re-enabled when disconnected.
5852 */
5853 conn->adv_instance = ev->handle;
5854
5855 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
5856 bacmp(&conn->resp_addr, BDADDR_ANY))
5857 goto unlock;
5858
5859 if (!ev->handle) {
5860 bacpy(&conn->resp_addr, &hdev->random_addr);
5861 goto unlock;
5862 }
5863
5864 if (adv)
5865 bacpy(&conn->resp_addr, &adv->random_addr);
5866 }
5867
5868 unlock:
5869 hci_dev_unlock(hdev);
5870 }
5871
hci_le_conn_update_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5872 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
5873 struct sk_buff *skb)
5874 {
5875 struct hci_ev_le_conn_update_complete *ev = data;
5876 struct hci_conn *conn;
5877
5878 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5879
5880 if (ev->status)
5881 return;
5882
5883 hci_dev_lock(hdev);
5884
5885 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5886 if (conn) {
5887 conn->le_conn_interval = le16_to_cpu(ev->interval);
5888 conn->le_conn_latency = le16_to_cpu(ev->latency);
5889 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
5890 }
5891
5892 hci_dev_unlock(hdev);
5893 }
5894
5895 /* 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)5896 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
5897 bdaddr_t *addr,
5898 u8 addr_type, bool addr_resolved,
5899 u8 adv_type, u8 phy, u8 sec_phy)
5900 {
5901 struct hci_conn *conn;
5902 struct hci_conn_params *params;
5903
5904 /* If the event is not connectable don't proceed further */
5905 if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
5906 return NULL;
5907
5908 /* Ignore if the device is blocked or hdev is suspended */
5909 if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
5910 hdev->suspended)
5911 return NULL;
5912
5913 /* Most controller will fail if we try to create new connections
5914 * while we have an existing one in peripheral role.
5915 */
5916 if (hdev->conn_hash.le_num_peripheral > 0 &&
5917 (test_bit(HCI_QUIRK_BROKEN_LE_STATES, &hdev->quirks) ||
5918 !(hdev->le_states[3] & 0x10)))
5919 return NULL;
5920
5921 /* If we're not connectable only connect devices that we have in
5922 * our pend_le_conns list.
5923 */
5924 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
5925 addr_type);
5926 if (!params)
5927 return NULL;
5928
5929 if (!params->explicit_connect) {
5930 switch (params->auto_connect) {
5931 case HCI_AUTO_CONN_DIRECT:
5932 /* Only devices advertising with ADV_DIRECT_IND are
5933 * triggering a connection attempt. This is allowing
5934 * incoming connections from peripheral devices.
5935 */
5936 if (adv_type != LE_ADV_DIRECT_IND)
5937 return NULL;
5938 break;
5939 case HCI_AUTO_CONN_ALWAYS:
5940 /* Devices advertising with ADV_IND or ADV_DIRECT_IND
5941 * are triggering a connection attempt. This means
5942 * that incoming connections from peripheral device are
5943 * accepted and also outgoing connections to peripheral
5944 * devices are established when found.
5945 */
5946 break;
5947 default:
5948 return NULL;
5949 }
5950 }
5951
5952 conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
5953 BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
5954 HCI_ROLE_MASTER, phy, sec_phy);
5955 if (!IS_ERR(conn)) {
5956 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
5957 * by higher layer that tried to connect, if no then
5958 * store the pointer since we don't really have any
5959 * other owner of the object besides the params that
5960 * triggered it. This way we can abort the connection if
5961 * the parameters get removed and keep the reference
5962 * count consistent once the connection is established.
5963 */
5964
5965 if (!params->explicit_connect)
5966 params->conn = hci_conn_get(conn);
5967
5968 return conn;
5969 }
5970
5971 switch (PTR_ERR(conn)) {
5972 case -EBUSY:
5973 /* If hci_connect() returns -EBUSY it means there is already
5974 * an LE connection attempt going on. Since controllers don't
5975 * support more than one connection attempt at the time, we
5976 * don't consider this an error case.
5977 */
5978 break;
5979 default:
5980 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
5981 return NULL;
5982 }
5983
5984 return NULL;
5985 }
5986
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)5987 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
5988 u8 bdaddr_type, bdaddr_t *direct_addr,
5989 u8 direct_addr_type, u8 phy, u8 sec_phy, s8 rssi,
5990 u8 *data, u8 len, bool ext_adv, bool ctl_time,
5991 u64 instant)
5992 {
5993 struct discovery_state *d = &hdev->discovery;
5994 struct smp_irk *irk;
5995 struct hci_conn *conn;
5996 bool match, bdaddr_resolved;
5997 u32 flags;
5998 u8 *ptr;
5999
6000 switch (type) {
6001 case LE_ADV_IND:
6002 case LE_ADV_DIRECT_IND:
6003 case LE_ADV_SCAN_IND:
6004 case LE_ADV_NONCONN_IND:
6005 case LE_ADV_SCAN_RSP:
6006 break;
6007 default:
6008 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6009 "type: 0x%02x", type);
6010 return;
6011 }
6012
6013 if (len > max_adv_len(hdev)) {
6014 bt_dev_err_ratelimited(hdev,
6015 "adv larger than maximum supported");
6016 return;
6017 }
6018
6019 /* Find the end of the data in case the report contains padded zero
6020 * bytes at the end causing an invalid length value.
6021 *
6022 * When data is NULL, len is 0 so there is no need for extra ptr
6023 * check as 'ptr < data + 0' is already false in such case.
6024 */
6025 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6026 if (ptr + 1 + *ptr > data + len)
6027 break;
6028 }
6029
6030 /* Adjust for actual length. This handles the case when remote
6031 * device is advertising with incorrect data length.
6032 */
6033 len = ptr - data;
6034
6035 /* If the direct address is present, then this report is from
6036 * a LE Direct Advertising Report event. In that case it is
6037 * important to see if the address is matching the local
6038 * controller address.
6039 *
6040 * If local privacy is not enable the controller shall not be
6041 * generating such event since according to its documentation it is only
6042 * valid for filter_policy 0x02 and 0x03, but the fact that it did
6043 * generate LE Direct Advertising Report means it is probably broken and
6044 * won't generate any other event which can potentially break
6045 * auto-connect logic so in case local privacy is not enable this
6046 * ignores the direct_addr so it works as a regular report.
6047 */
6048 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr &&
6049 hci_dev_test_flag(hdev, HCI_PRIVACY)) {
6050 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6051 &bdaddr_resolved);
6052
6053 /* Only resolvable random addresses are valid for these
6054 * kind of reports and others can be ignored.
6055 */
6056 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6057 return;
6058
6059 /* If the local IRK of the controller does not match
6060 * with the resolvable random address provided, then
6061 * this report can be ignored.
6062 */
6063 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6064 return;
6065 }
6066
6067 /* Check if we need to convert to identity address */
6068 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6069 if (irk) {
6070 bdaddr = &irk->bdaddr;
6071 bdaddr_type = irk->addr_type;
6072 }
6073
6074 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6075
6076 /* Check if we have been requested to connect to this device.
6077 *
6078 * direct_addr is set only for directed advertising reports (it is NULL
6079 * for advertising reports) and is already verified to be RPA above.
6080 */
6081 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6082 type, phy, sec_phy);
6083 if (!ext_adv && conn && type == LE_ADV_IND &&
6084 len <= max_adv_len(hdev)) {
6085 /* Store report for later inclusion by
6086 * mgmt_device_connected
6087 */
6088 memcpy(conn->le_adv_data, data, len);
6089 conn->le_adv_data_len = len;
6090 }
6091
6092 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6093 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6094 else
6095 flags = 0;
6096
6097 /* All scan results should be sent up for Mesh systems */
6098 if (hci_dev_test_flag(hdev, HCI_MESH)) {
6099 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6100 rssi, flags, data, len, NULL, 0, instant);
6101 return;
6102 }
6103
6104 /* Passive scanning shouldn't trigger any device found events,
6105 * except for devices marked as CONN_REPORT for which we do send
6106 * device found events, or advertisement monitoring requested.
6107 */
6108 if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6109 if (type == LE_ADV_DIRECT_IND)
6110 return;
6111
6112 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6113 bdaddr, bdaddr_type) &&
6114 idr_is_empty(&hdev->adv_monitors_idr))
6115 return;
6116
6117 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6118 rssi, flags, data, len, NULL, 0, 0);
6119 return;
6120 }
6121
6122 /* When receiving a scan response, then there is no way to
6123 * know if the remote device is connectable or not. However
6124 * since scan responses are merged with a previously seen
6125 * advertising report, the flags field from that report
6126 * will be used.
6127 *
6128 * In the unlikely case that a controller just sends a scan
6129 * response event that doesn't match the pending report, then
6130 * it is marked as a standalone SCAN_RSP.
6131 */
6132 if (type == LE_ADV_SCAN_RSP)
6133 flags = MGMT_DEV_FOUND_SCAN_RSP;
6134
6135 /* If there's nothing pending either store the data from this
6136 * event or send an immediate device found event if the data
6137 * should not be stored for later.
6138 */
6139 if (!has_pending_adv_report(hdev)) {
6140 /* If the report will trigger a SCAN_REQ store it for
6141 * later merging.
6142 */
6143 if (!ext_adv && (type == LE_ADV_IND ||
6144 type == LE_ADV_SCAN_IND)) {
6145 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6146 rssi, flags, data, len);
6147 return;
6148 }
6149
6150 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6151 rssi, flags, data, len, NULL, 0, 0);
6152 return;
6153 }
6154
6155 /* Check if the pending report is for the same device as the new one */
6156 match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6157 bdaddr_type == d->last_adv_addr_type);
6158
6159 /* If the pending data doesn't match this report or this isn't a
6160 * scan response (e.g. we got a duplicate ADV_IND) then force
6161 * sending of the pending data.
6162 */
6163 if (type != LE_ADV_SCAN_RSP || !match) {
6164 /* Send out whatever is in the cache, but skip duplicates */
6165 if (!match)
6166 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6167 d->last_adv_addr_type, NULL,
6168 d->last_adv_rssi, d->last_adv_flags,
6169 d->last_adv_data,
6170 d->last_adv_data_len, NULL, 0, 0);
6171
6172 /* If the new report will trigger a SCAN_REQ store it for
6173 * later merging.
6174 */
6175 if (!ext_adv && (type == LE_ADV_IND ||
6176 type == LE_ADV_SCAN_IND)) {
6177 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6178 rssi, flags, data, len);
6179 return;
6180 }
6181
6182 /* The advertising reports cannot be merged, so clear
6183 * the pending report and send out a device found event.
6184 */
6185 clear_pending_adv_report(hdev);
6186 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6187 rssi, flags, data, len, NULL, 0, 0);
6188 return;
6189 }
6190
6191 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6192 * the new event is a SCAN_RSP. We can therefore proceed with
6193 * sending a merged device found event.
6194 */
6195 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6196 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6197 d->last_adv_data, d->last_adv_data_len, data, len, 0);
6198 clear_pending_adv_report(hdev);
6199 }
6200
hci_le_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6201 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6202 struct sk_buff *skb)
6203 {
6204 struct hci_ev_le_advertising_report *ev = data;
6205 u64 instant = jiffies;
6206
6207 if (!ev->num)
6208 return;
6209
6210 hci_dev_lock(hdev);
6211
6212 while (ev->num--) {
6213 struct hci_ev_le_advertising_info *info;
6214 s8 rssi;
6215
6216 info = hci_le_ev_skb_pull(hdev, skb,
6217 HCI_EV_LE_ADVERTISING_REPORT,
6218 sizeof(*info));
6219 if (!info)
6220 break;
6221
6222 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6223 info->length + 1))
6224 break;
6225
6226 if (info->length <= max_adv_len(hdev)) {
6227 rssi = info->data[info->length];
6228 process_adv_report(hdev, info->type, &info->bdaddr,
6229 info->bdaddr_type, NULL, 0,
6230 HCI_ADV_PHY_1M, 0, rssi,
6231 info->data, info->length, false,
6232 false, instant);
6233 } else {
6234 bt_dev_err(hdev, "Dropping invalid advertising data");
6235 }
6236 }
6237
6238 hci_dev_unlock(hdev);
6239 }
6240
ext_evt_type_to_legacy(struct hci_dev * hdev,u16 evt_type)6241 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6242 {
6243 if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6244 switch (evt_type) {
6245 case LE_LEGACY_ADV_IND:
6246 return LE_ADV_IND;
6247 case LE_LEGACY_ADV_DIRECT_IND:
6248 return LE_ADV_DIRECT_IND;
6249 case LE_LEGACY_ADV_SCAN_IND:
6250 return LE_ADV_SCAN_IND;
6251 case LE_LEGACY_NONCONN_IND:
6252 return LE_ADV_NONCONN_IND;
6253 case LE_LEGACY_SCAN_RSP_ADV:
6254 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6255 return LE_ADV_SCAN_RSP;
6256 }
6257
6258 goto invalid;
6259 }
6260
6261 if (evt_type & LE_EXT_ADV_CONN_IND) {
6262 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6263 return LE_ADV_DIRECT_IND;
6264
6265 return LE_ADV_IND;
6266 }
6267
6268 if (evt_type & LE_EXT_ADV_SCAN_RSP)
6269 return LE_ADV_SCAN_RSP;
6270
6271 if (evt_type & LE_EXT_ADV_SCAN_IND)
6272 return LE_ADV_SCAN_IND;
6273
6274 if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6275 evt_type & LE_EXT_ADV_DIRECT_IND)
6276 return LE_ADV_NONCONN_IND;
6277
6278 invalid:
6279 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6280 evt_type);
6281
6282 return LE_ADV_INVALID;
6283 }
6284
hci_le_ext_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6285 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6286 struct sk_buff *skb)
6287 {
6288 struct hci_ev_le_ext_adv_report *ev = data;
6289 u64 instant = jiffies;
6290
6291 if (!ev->num)
6292 return;
6293
6294 hci_dev_lock(hdev);
6295
6296 while (ev->num--) {
6297 struct hci_ev_le_ext_adv_info *info;
6298 u8 legacy_evt_type;
6299 u16 evt_type;
6300
6301 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6302 sizeof(*info));
6303 if (!info)
6304 break;
6305
6306 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6307 info->length))
6308 break;
6309
6310 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6311 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6312
6313 if (test_bit(HCI_QUIRK_FIXUP_LE_EXT_ADV_REPORT_PHY,
6314 &hdev->quirks)) {
6315 info->primary_phy &= 0x1f;
6316 info->secondary_phy &= 0x1f;
6317 }
6318
6319 /* Check if PA Sync is pending and if the hci_conn SID has not
6320 * been set update it.
6321 */
6322 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
6323 struct hci_conn *conn;
6324
6325 conn = hci_conn_hash_lookup_create_pa_sync(hdev);
6326 if (conn && conn->sid == HCI_SID_INVALID)
6327 conn->sid = info->sid;
6328 }
6329
6330 if (legacy_evt_type != LE_ADV_INVALID) {
6331 process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6332 info->bdaddr_type, NULL, 0,
6333 info->primary_phy,
6334 info->secondary_phy,
6335 info->rssi, info->data, info->length,
6336 !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6337 false, instant);
6338 }
6339 }
6340
6341 hci_dev_unlock(hdev);
6342 }
6343
hci_le_pa_term_sync(struct hci_dev * hdev,__le16 handle)6344 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6345 {
6346 struct hci_cp_le_pa_term_sync cp;
6347
6348 memset(&cp, 0, sizeof(cp));
6349 cp.handle = handle;
6350
6351 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6352 }
6353
hci_le_pa_sync_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6354 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6355 struct sk_buff *skb)
6356 {
6357 struct hci_ev_le_pa_sync_established *ev = data;
6358 int mask = hdev->link_mode;
6359 __u8 flags = 0;
6360 struct hci_conn *pa_sync, *conn;
6361
6362 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6363
6364 hci_dev_lock(hdev);
6365
6366 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6367
6368 conn = hci_conn_hash_lookup_create_pa_sync(hdev);
6369 if (!conn) {
6370 bt_dev_err(hdev,
6371 "Unable to find connection for dst %pMR sid 0x%2.2x",
6372 &ev->bdaddr, ev->sid);
6373 goto unlock;
6374 }
6375
6376 clear_bit(HCI_CONN_CREATE_PA_SYNC, &conn->flags);
6377
6378 conn->sync_handle = le16_to_cpu(ev->handle);
6379 conn->sid = HCI_SID_INVALID;
6380
6381 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, BIS_LINK,
6382 &flags);
6383 if (!(mask & HCI_LM_ACCEPT)) {
6384 hci_le_pa_term_sync(hdev, ev->handle);
6385 goto unlock;
6386 }
6387
6388 if (!(flags & HCI_PROTO_DEFER))
6389 goto unlock;
6390
6391 /* Add connection to indicate PA sync event */
6392 pa_sync = hci_conn_add_unset(hdev, BIS_LINK, BDADDR_ANY,
6393 HCI_ROLE_SLAVE);
6394
6395 if (IS_ERR(pa_sync))
6396 goto unlock;
6397
6398 pa_sync->sync_handle = le16_to_cpu(ev->handle);
6399
6400 if (ev->status) {
6401 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6402
6403 /* Notify iso layer */
6404 hci_connect_cfm(pa_sync, ev->status);
6405 }
6406
6407 unlock:
6408 hci_dev_unlock(hdev);
6409 }
6410
hci_le_per_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6411 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6412 struct sk_buff *skb)
6413 {
6414 struct hci_ev_le_per_adv_report *ev = data;
6415 int mask = hdev->link_mode;
6416 __u8 flags = 0;
6417 struct hci_conn *pa_sync;
6418
6419 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6420
6421 hci_dev_lock(hdev);
6422
6423 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, BIS_LINK, &flags);
6424 if (!(mask & HCI_LM_ACCEPT))
6425 goto unlock;
6426
6427 if (!(flags & HCI_PROTO_DEFER))
6428 goto unlock;
6429
6430 pa_sync = hci_conn_hash_lookup_pa_sync_handle
6431 (hdev,
6432 le16_to_cpu(ev->sync_handle));
6433
6434 if (!pa_sync)
6435 goto unlock;
6436
6437 if (ev->data_status == LE_PA_DATA_COMPLETE &&
6438 !test_and_set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags)) {
6439 /* Notify iso layer */
6440 hci_connect_cfm(pa_sync, 0);
6441
6442 /* Notify MGMT layer */
6443 mgmt_device_connected(hdev, pa_sync, NULL, 0);
6444 }
6445
6446 unlock:
6447 hci_dev_unlock(hdev);
6448 }
6449
hci_le_remote_feat_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6450 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6451 struct sk_buff *skb)
6452 {
6453 struct hci_ev_le_remote_feat_complete *ev = data;
6454 struct hci_conn *conn;
6455
6456 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6457
6458 hci_dev_lock(hdev);
6459
6460 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6461 if (conn) {
6462 if (!ev->status)
6463 memcpy(conn->features[0], ev->features, 8);
6464
6465 if (conn->state == BT_CONFIG) {
6466 __u8 status;
6467
6468 /* If the local controller supports peripheral-initiated
6469 * features exchange, but the remote controller does
6470 * not, then it is possible that the error code 0x1a
6471 * for unsupported remote feature gets returned.
6472 *
6473 * In this specific case, allow the connection to
6474 * transition into connected state and mark it as
6475 * successful.
6476 */
6477 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE &&
6478 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6479 status = 0x00;
6480 else
6481 status = ev->status;
6482
6483 conn->state = BT_CONNECTED;
6484 hci_connect_cfm(conn, status);
6485 hci_conn_drop(conn);
6486 }
6487 }
6488
6489 hci_dev_unlock(hdev);
6490 }
6491
hci_le_ltk_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6492 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6493 struct sk_buff *skb)
6494 {
6495 struct hci_ev_le_ltk_req *ev = data;
6496 struct hci_cp_le_ltk_reply cp;
6497 struct hci_cp_le_ltk_neg_reply neg;
6498 struct hci_conn *conn;
6499 struct smp_ltk *ltk;
6500
6501 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6502
6503 hci_dev_lock(hdev);
6504
6505 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6506 if (conn == NULL)
6507 goto not_found;
6508
6509 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6510 if (!ltk)
6511 goto not_found;
6512
6513 if (smp_ltk_is_sc(ltk)) {
6514 /* With SC both EDiv and Rand are set to zero */
6515 if (ev->ediv || ev->rand)
6516 goto not_found;
6517 } else {
6518 /* For non-SC keys check that EDiv and Rand match */
6519 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6520 goto not_found;
6521 }
6522
6523 memcpy(cp.ltk, ltk->val, ltk->enc_size);
6524 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6525 cp.handle = cpu_to_le16(conn->handle);
6526
6527 conn->pending_sec_level = smp_ltk_sec_level(ltk);
6528
6529 conn->enc_key_size = ltk->enc_size;
6530
6531 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6532
6533 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6534 * temporary key used to encrypt a connection following
6535 * pairing. It is used during the Encrypted Session Setup to
6536 * distribute the keys. Later, security can be re-established
6537 * using a distributed LTK.
6538 */
6539 if (ltk->type == SMP_STK) {
6540 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6541 list_del_rcu(<k->list);
6542 kfree_rcu(ltk, rcu);
6543 } else {
6544 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6545 }
6546
6547 hci_dev_unlock(hdev);
6548
6549 return;
6550
6551 not_found:
6552 neg.handle = ev->handle;
6553 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6554 hci_dev_unlock(hdev);
6555 }
6556
send_conn_param_neg_reply(struct hci_dev * hdev,u16 handle,u8 reason)6557 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6558 u8 reason)
6559 {
6560 struct hci_cp_le_conn_param_req_neg_reply cp;
6561
6562 cp.handle = cpu_to_le16(handle);
6563 cp.reason = reason;
6564
6565 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6566 &cp);
6567 }
6568
hci_le_remote_conn_param_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6569 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6570 struct sk_buff *skb)
6571 {
6572 struct hci_ev_le_remote_conn_param_req *ev = data;
6573 struct hci_cp_le_conn_param_req_reply cp;
6574 struct hci_conn *hcon;
6575 u16 handle, min, max, latency, timeout;
6576
6577 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6578
6579 handle = le16_to_cpu(ev->handle);
6580 min = le16_to_cpu(ev->interval_min);
6581 max = le16_to_cpu(ev->interval_max);
6582 latency = le16_to_cpu(ev->latency);
6583 timeout = le16_to_cpu(ev->timeout);
6584
6585 hcon = hci_conn_hash_lookup_handle(hdev, handle);
6586 if (!hcon || hcon->state != BT_CONNECTED)
6587 return send_conn_param_neg_reply(hdev, handle,
6588 HCI_ERROR_UNKNOWN_CONN_ID);
6589
6590 if (max > hcon->le_conn_max_interval)
6591 return send_conn_param_neg_reply(hdev, handle,
6592 HCI_ERROR_INVALID_LL_PARAMS);
6593
6594 if (hci_check_conn_params(min, max, latency, timeout))
6595 return send_conn_param_neg_reply(hdev, handle,
6596 HCI_ERROR_INVALID_LL_PARAMS);
6597
6598 if (hcon->role == HCI_ROLE_MASTER) {
6599 struct hci_conn_params *params;
6600 u8 store_hint;
6601
6602 hci_dev_lock(hdev);
6603
6604 params = hci_conn_params_lookup(hdev, &hcon->dst,
6605 hcon->dst_type);
6606 if (params) {
6607 params->conn_min_interval = min;
6608 params->conn_max_interval = max;
6609 params->conn_latency = latency;
6610 params->supervision_timeout = timeout;
6611 store_hint = 0x01;
6612 } else {
6613 store_hint = 0x00;
6614 }
6615
6616 hci_dev_unlock(hdev);
6617
6618 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6619 store_hint, min, max, latency, timeout);
6620 }
6621
6622 cp.handle = ev->handle;
6623 cp.interval_min = ev->interval_min;
6624 cp.interval_max = ev->interval_max;
6625 cp.latency = ev->latency;
6626 cp.timeout = ev->timeout;
6627 cp.min_ce_len = 0;
6628 cp.max_ce_len = 0;
6629
6630 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6631 }
6632
hci_le_direct_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6633 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6634 struct sk_buff *skb)
6635 {
6636 struct hci_ev_le_direct_adv_report *ev = data;
6637 u64 instant = jiffies;
6638 int i;
6639
6640 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6641 flex_array_size(ev, info, ev->num)))
6642 return;
6643
6644 if (!ev->num)
6645 return;
6646
6647 hci_dev_lock(hdev);
6648
6649 for (i = 0; i < ev->num; i++) {
6650 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6651
6652 process_adv_report(hdev, info->type, &info->bdaddr,
6653 info->bdaddr_type, &info->direct_addr,
6654 info->direct_addr_type, HCI_ADV_PHY_1M, 0,
6655 info->rssi, NULL, 0, false, false, instant);
6656 }
6657
6658 hci_dev_unlock(hdev);
6659 }
6660
hci_le_phy_update_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6661 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6662 struct sk_buff *skb)
6663 {
6664 struct hci_ev_le_phy_update_complete *ev = data;
6665 struct hci_conn *conn;
6666
6667 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6668
6669 if (ev->status)
6670 return;
6671
6672 hci_dev_lock(hdev);
6673
6674 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6675 if (!conn)
6676 goto unlock;
6677
6678 conn->le_tx_phy = ev->tx_phy;
6679 conn->le_rx_phy = ev->rx_phy;
6680
6681 unlock:
6682 hci_dev_unlock(hdev);
6683 }
6684
hci_le_cis_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6685 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6686 struct sk_buff *skb)
6687 {
6688 struct hci_evt_le_cis_established *ev = data;
6689 struct hci_conn *conn;
6690 struct bt_iso_qos *qos;
6691 bool pending = false;
6692 u16 handle = __le16_to_cpu(ev->handle);
6693 u32 c_sdu_interval, p_sdu_interval;
6694
6695 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6696
6697 hci_dev_lock(hdev);
6698
6699 conn = hci_conn_hash_lookup_handle(hdev, handle);
6700 if (!conn) {
6701 bt_dev_err(hdev,
6702 "Unable to find connection with handle 0x%4.4x",
6703 handle);
6704 goto unlock;
6705 }
6706
6707 if (conn->type != CIS_LINK) {
6708 bt_dev_err(hdev,
6709 "Invalid connection link type handle 0x%4.4x",
6710 handle);
6711 goto unlock;
6712 }
6713
6714 qos = &conn->iso_qos;
6715
6716 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6717
6718 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part G
6719 * page 3075:
6720 * Transport_Latency_C_To_P = CIG_Sync_Delay + (FT_C_To_P) ×
6721 * ISO_Interval + SDU_Interval_C_To_P
6722 * ...
6723 * SDU_Interval = (CIG_Sync_Delay + (FT) x ISO_Interval) -
6724 * Transport_Latency
6725 */
6726 c_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6727 (ev->c_ft * le16_to_cpu(ev->interval) * 1250)) -
6728 get_unaligned_le24(ev->c_latency);
6729 p_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6730 (ev->p_ft * le16_to_cpu(ev->interval) * 1250)) -
6731 get_unaligned_le24(ev->p_latency);
6732
6733 switch (conn->role) {
6734 case HCI_ROLE_SLAVE:
6735 qos->ucast.in.interval = c_sdu_interval;
6736 qos->ucast.out.interval = p_sdu_interval;
6737 /* Convert Transport Latency (us) to Latency (msec) */
6738 qos->ucast.in.latency =
6739 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6740 1000);
6741 qos->ucast.out.latency =
6742 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6743 1000);
6744 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6745 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6746 qos->ucast.in.phy = ev->c_phy;
6747 qos->ucast.out.phy = ev->p_phy;
6748 break;
6749 case HCI_ROLE_MASTER:
6750 qos->ucast.in.interval = p_sdu_interval;
6751 qos->ucast.out.interval = c_sdu_interval;
6752 /* Convert Transport Latency (us) to Latency (msec) */
6753 qos->ucast.out.latency =
6754 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6755 1000);
6756 qos->ucast.in.latency =
6757 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6758 1000);
6759 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6760 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6761 qos->ucast.out.phy = ev->c_phy;
6762 qos->ucast.in.phy = ev->p_phy;
6763 break;
6764 }
6765
6766 if (!ev->status) {
6767 conn->state = BT_CONNECTED;
6768 hci_debugfs_create_conn(conn);
6769 hci_conn_add_sysfs(conn);
6770 hci_iso_setup_path(conn);
6771 goto unlock;
6772 }
6773
6774 conn->state = BT_CLOSED;
6775 hci_connect_cfm(conn, ev->status);
6776 hci_conn_del(conn);
6777
6778 unlock:
6779 if (pending)
6780 hci_le_create_cis_pending(hdev);
6781
6782 hci_dev_unlock(hdev);
6783 }
6784
hci_le_reject_cis(struct hci_dev * hdev,__le16 handle)6785 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6786 {
6787 struct hci_cp_le_reject_cis cp;
6788
6789 memset(&cp, 0, sizeof(cp));
6790 cp.handle = handle;
6791 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6792 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6793 }
6794
hci_le_accept_cis(struct hci_dev * hdev,__le16 handle)6795 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6796 {
6797 struct hci_cp_le_accept_cis cp;
6798
6799 memset(&cp, 0, sizeof(cp));
6800 cp.handle = handle;
6801 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6802 }
6803
hci_le_cis_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6804 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6805 struct sk_buff *skb)
6806 {
6807 struct hci_evt_le_cis_req *ev = data;
6808 u16 acl_handle, cis_handle;
6809 struct hci_conn *acl, *cis;
6810 int mask;
6811 __u8 flags = 0;
6812
6813 acl_handle = __le16_to_cpu(ev->acl_handle);
6814 cis_handle = __le16_to_cpu(ev->cis_handle);
6815
6816 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
6817 acl_handle, cis_handle, ev->cig_id, ev->cis_id);
6818
6819 hci_dev_lock(hdev);
6820
6821 acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
6822 if (!acl)
6823 goto unlock;
6824
6825 mask = hci_proto_connect_ind(hdev, &acl->dst, CIS_LINK, &flags);
6826 if (!(mask & HCI_LM_ACCEPT)) {
6827 hci_le_reject_cis(hdev, ev->cis_handle);
6828 goto unlock;
6829 }
6830
6831 cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
6832 if (!cis) {
6833 cis = hci_conn_add(hdev, CIS_LINK, &acl->dst,
6834 HCI_ROLE_SLAVE, cis_handle);
6835 if (IS_ERR(cis)) {
6836 hci_le_reject_cis(hdev, ev->cis_handle);
6837 goto unlock;
6838 }
6839 }
6840
6841 cis->iso_qos.ucast.cig = ev->cig_id;
6842 cis->iso_qos.ucast.cis = ev->cis_id;
6843
6844 if (!(flags & HCI_PROTO_DEFER)) {
6845 hci_le_accept_cis(hdev, ev->cis_handle);
6846 } else {
6847 cis->state = BT_CONNECT2;
6848 hci_connect_cfm(cis, 0);
6849 }
6850
6851 unlock:
6852 hci_dev_unlock(hdev);
6853 }
6854
hci_iso_term_big_sync(struct hci_dev * hdev,void * data)6855 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
6856 {
6857 u8 handle = PTR_UINT(data);
6858
6859 return hci_le_terminate_big_sync(hdev, handle,
6860 HCI_ERROR_LOCAL_HOST_TERM);
6861 }
6862
hci_le_create_big_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6863 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
6864 struct sk_buff *skb)
6865 {
6866 struct hci_evt_le_create_big_complete *ev = data;
6867 struct hci_conn *conn;
6868 __u8 i = 0;
6869
6870 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
6871
6872 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
6873 flex_array_size(ev, bis_handle, ev->num_bis)))
6874 return;
6875
6876 hci_dev_lock(hdev);
6877
6878 /* Connect all BISes that are bound to the BIG */
6879 while ((conn = hci_conn_hash_lookup_big_state(hdev, ev->handle,
6880 BT_BOUND))) {
6881 if (ev->status) {
6882 hci_connect_cfm(conn, ev->status);
6883 hci_conn_del(conn);
6884 continue;
6885 }
6886
6887 if (hci_conn_set_handle(conn,
6888 __le16_to_cpu(ev->bis_handle[i++])))
6889 continue;
6890
6891 conn->state = BT_CONNECTED;
6892 set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
6893 hci_debugfs_create_conn(conn);
6894 hci_conn_add_sysfs(conn);
6895 hci_iso_setup_path(conn);
6896 }
6897
6898 if (!ev->status && !i)
6899 /* If no BISes have been connected for the BIG,
6900 * terminate. This is in case all bound connections
6901 * have been closed before the BIG creation
6902 * has completed.
6903 */
6904 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
6905 UINT_PTR(ev->handle), NULL);
6906
6907 hci_dev_unlock(hdev);
6908 }
6909
hci_le_big_sync_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6910 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
6911 struct sk_buff *skb)
6912 {
6913 struct hci_evt_le_big_sync_estabilished *ev = data;
6914 struct hci_conn *bis, *conn;
6915 int i;
6916
6917 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6918
6919 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABLISHED,
6920 flex_array_size(ev, bis, ev->num_bis)))
6921 return;
6922
6923 hci_dev_lock(hdev);
6924
6925 conn = hci_conn_hash_lookup_big_sync_pend(hdev, ev->handle,
6926 ev->num_bis);
6927 if (!conn) {
6928 bt_dev_err(hdev,
6929 "Unable to find connection for big 0x%2.2x",
6930 ev->handle);
6931 goto unlock;
6932 }
6933
6934 clear_bit(HCI_CONN_CREATE_BIG_SYNC, &conn->flags);
6935
6936 conn->num_bis = 0;
6937 memset(conn->bis, 0, sizeof(conn->num_bis));
6938
6939 for (i = 0; i < ev->num_bis; i++) {
6940 u16 handle = le16_to_cpu(ev->bis[i]);
6941 __le32 interval;
6942
6943 bis = hci_conn_hash_lookup_handle(hdev, handle);
6944 if (!bis) {
6945 if (handle > HCI_CONN_HANDLE_MAX) {
6946 bt_dev_dbg(hdev, "ignore too large handle %u", handle);
6947 continue;
6948 }
6949 bis = hci_conn_add(hdev, BIS_LINK, BDADDR_ANY,
6950 HCI_ROLE_SLAVE, handle);
6951 if (IS_ERR(bis))
6952 continue;
6953 }
6954
6955 if (ev->status != 0x42)
6956 /* Mark PA sync as established */
6957 set_bit(HCI_CONN_PA_SYNC, &bis->flags);
6958
6959 bis->sync_handle = conn->sync_handle;
6960 bis->iso_qos.bcast.big = ev->handle;
6961 memset(&interval, 0, sizeof(interval));
6962 memcpy(&interval, ev->latency, sizeof(ev->latency));
6963 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
6964 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
6965 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
6966 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
6967
6968 if (!ev->status) {
6969 set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
6970 hci_iso_setup_path(bis);
6971 }
6972 }
6973
6974 /* In case BIG sync failed, notify each failed connection to
6975 * the user after all hci connections have been added
6976 */
6977 if (ev->status)
6978 for (i = 0; i < ev->num_bis; i++) {
6979 u16 handle = le16_to_cpu(ev->bis[i]);
6980
6981 bis = hci_conn_hash_lookup_handle(hdev, handle);
6982 if (!bis)
6983 continue;
6984
6985 set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
6986 hci_connect_cfm(bis, ev->status);
6987 }
6988
6989 unlock:
6990 hci_dev_unlock(hdev);
6991 }
6992
hci_le_big_info_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6993 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
6994 struct sk_buff *skb)
6995 {
6996 struct hci_evt_le_big_info_adv_report *ev = data;
6997 int mask = hdev->link_mode;
6998 __u8 flags = 0;
6999 struct hci_conn *pa_sync;
7000
7001 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
7002
7003 hci_dev_lock(hdev);
7004
7005 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, BIS_LINK, &flags);
7006 if (!(mask & HCI_LM_ACCEPT))
7007 goto unlock;
7008
7009 if (!(flags & HCI_PROTO_DEFER))
7010 goto unlock;
7011
7012 pa_sync = hci_conn_hash_lookup_pa_sync_handle
7013 (hdev,
7014 le16_to_cpu(ev->sync_handle));
7015
7016 if (!pa_sync)
7017 goto unlock;
7018
7019 pa_sync->iso_qos.bcast.encryption = ev->encryption;
7020
7021 /* Notify iso layer */
7022 hci_connect_cfm(pa_sync, 0);
7023
7024 unlock:
7025 hci_dev_unlock(hdev);
7026 }
7027
7028 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
7029 [_op] = { \
7030 .func = _func, \
7031 .min_len = _min_len, \
7032 .max_len = _max_len, \
7033 }
7034
7035 #define HCI_LE_EV(_op, _func, _len) \
7036 HCI_LE_EV_VL(_op, _func, _len, _len)
7037
7038 #define HCI_LE_EV_STATUS(_op, _func) \
7039 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
7040
7041 /* Entries in this table shall have their position according to the subevent
7042 * opcode they handle so the use of the macros above is recommend since it does
7043 * attempt to initialize at its proper index using Designated Initializers that
7044 * way events without a callback function can be ommited.
7045 */
7046 static const struct hci_le_ev {
7047 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
7048 u16 min_len;
7049 u16 max_len;
7050 } hci_le_ev_table[U8_MAX + 1] = {
7051 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
7052 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
7053 sizeof(struct hci_ev_le_conn_complete)),
7054 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
7055 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
7056 sizeof(struct hci_ev_le_advertising_report),
7057 HCI_MAX_EVENT_SIZE),
7058 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7059 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7060 hci_le_conn_update_complete_evt,
7061 sizeof(struct hci_ev_le_conn_update_complete)),
7062 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7063 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7064 hci_le_remote_feat_complete_evt,
7065 sizeof(struct hci_ev_le_remote_feat_complete)),
7066 /* [0x05 = HCI_EV_LE_LTK_REQ] */
7067 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7068 sizeof(struct hci_ev_le_ltk_req)),
7069 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7070 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7071 hci_le_remote_conn_param_req_evt,
7072 sizeof(struct hci_ev_le_remote_conn_param_req)),
7073 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7074 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7075 hci_le_enh_conn_complete_evt,
7076 sizeof(struct hci_ev_le_enh_conn_complete)),
7077 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7078 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7079 sizeof(struct hci_ev_le_direct_adv_report),
7080 HCI_MAX_EVENT_SIZE),
7081 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7082 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7083 sizeof(struct hci_ev_le_phy_update_complete)),
7084 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7085 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7086 sizeof(struct hci_ev_le_ext_adv_report),
7087 HCI_MAX_EVENT_SIZE),
7088 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7089 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7090 hci_le_pa_sync_estabilished_evt,
7091 sizeof(struct hci_ev_le_pa_sync_established)),
7092 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7093 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7094 hci_le_per_adv_report_evt,
7095 sizeof(struct hci_ev_le_per_adv_report),
7096 HCI_MAX_EVENT_SIZE),
7097 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7098 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7099 sizeof(struct hci_evt_le_ext_adv_set_term)),
7100 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7101 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7102 sizeof(struct hci_evt_le_cis_established)),
7103 /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7104 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7105 sizeof(struct hci_evt_le_cis_req)),
7106 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7107 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7108 hci_le_create_big_complete_evt,
7109 sizeof(struct hci_evt_le_create_big_complete),
7110 HCI_MAX_EVENT_SIZE),
7111 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABLISHED] */
7112 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABLISHED,
7113 hci_le_big_sync_established_evt,
7114 sizeof(struct hci_evt_le_big_sync_estabilished),
7115 HCI_MAX_EVENT_SIZE),
7116 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7117 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7118 hci_le_big_info_adv_report_evt,
7119 sizeof(struct hci_evt_le_big_info_adv_report),
7120 HCI_MAX_EVENT_SIZE),
7121 };
7122
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)7123 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7124 struct sk_buff *skb, u16 *opcode, u8 *status,
7125 hci_req_complete_t *req_complete,
7126 hci_req_complete_skb_t *req_complete_skb)
7127 {
7128 struct hci_ev_le_meta *ev = data;
7129 const struct hci_le_ev *subev;
7130
7131 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7132
7133 /* Only match event if command OGF is for LE */
7134 if (hdev->req_skb &&
7135 (hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 ||
7136 hci_skb_opcode(hdev->req_skb) == HCI_OP_NOP) &&
7137 hci_skb_event(hdev->req_skb) == ev->subevent) {
7138 *opcode = hci_skb_opcode(hdev->req_skb);
7139 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7140 req_complete_skb);
7141 }
7142
7143 subev = &hci_le_ev_table[ev->subevent];
7144 if (!subev->func)
7145 return;
7146
7147 if (skb->len < subev->min_len) {
7148 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7149 ev->subevent, skb->len, subev->min_len);
7150 return;
7151 }
7152
7153 /* Just warn if the length is over max_len size it still be
7154 * possible to partially parse the event so leave to callback to
7155 * decide if that is acceptable.
7156 */
7157 if (skb->len > subev->max_len)
7158 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7159 ev->subevent, skb->len, subev->max_len);
7160 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7161 if (!data)
7162 return;
7163
7164 subev->func(hdev, data, skb);
7165 }
7166
hci_get_cmd_complete(struct hci_dev * hdev,u16 opcode,u8 event,struct sk_buff * skb)7167 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7168 u8 event, struct sk_buff *skb)
7169 {
7170 struct hci_ev_cmd_complete *ev;
7171 struct hci_event_hdr *hdr;
7172
7173 if (!skb)
7174 return false;
7175
7176 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7177 if (!hdr)
7178 return false;
7179
7180 if (event) {
7181 if (hdr->evt != event)
7182 return false;
7183 return true;
7184 }
7185
7186 /* Check if request ended in Command Status - no way to retrieve
7187 * any extra parameters in this case.
7188 */
7189 if (hdr->evt == HCI_EV_CMD_STATUS)
7190 return false;
7191
7192 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7193 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7194 hdr->evt);
7195 return false;
7196 }
7197
7198 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7199 if (!ev)
7200 return false;
7201
7202 if (opcode != __le16_to_cpu(ev->opcode)) {
7203 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7204 __le16_to_cpu(ev->opcode));
7205 return false;
7206 }
7207
7208 return true;
7209 }
7210
hci_store_wake_reason(struct hci_dev * hdev,u8 event,struct sk_buff * skb)7211 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7212 struct sk_buff *skb)
7213 {
7214 struct hci_ev_le_advertising_info *adv;
7215 struct hci_ev_le_direct_adv_info *direct_adv;
7216 struct hci_ev_le_ext_adv_info *ext_adv;
7217 const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7218 const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7219
7220 hci_dev_lock(hdev);
7221
7222 /* If we are currently suspended and this is the first BT event seen,
7223 * save the wake reason associated with the event.
7224 */
7225 if (!hdev->suspended || hdev->wake_reason)
7226 goto unlock;
7227
7228 /* Default to remote wake. Values for wake_reason are documented in the
7229 * Bluez mgmt api docs.
7230 */
7231 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7232
7233 /* Once configured for remote wakeup, we should only wake up for
7234 * reconnections. It's useful to see which device is waking us up so
7235 * keep track of the bdaddr of the connection event that woke us up.
7236 */
7237 if (event == HCI_EV_CONN_REQUEST) {
7238 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7239 hdev->wake_addr_type = BDADDR_BREDR;
7240 } else if (event == HCI_EV_CONN_COMPLETE) {
7241 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7242 hdev->wake_addr_type = BDADDR_BREDR;
7243 } else if (event == HCI_EV_LE_META) {
7244 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7245 u8 subevent = le_ev->subevent;
7246 u8 *ptr = &skb->data[sizeof(*le_ev)];
7247 u8 num_reports = *ptr;
7248
7249 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7250 subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7251 subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7252 num_reports) {
7253 adv = (void *)(ptr + 1);
7254 direct_adv = (void *)(ptr + 1);
7255 ext_adv = (void *)(ptr + 1);
7256
7257 switch (subevent) {
7258 case HCI_EV_LE_ADVERTISING_REPORT:
7259 bacpy(&hdev->wake_addr, &adv->bdaddr);
7260 hdev->wake_addr_type = adv->bdaddr_type;
7261 break;
7262 case HCI_EV_LE_DIRECT_ADV_REPORT:
7263 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7264 hdev->wake_addr_type = direct_adv->bdaddr_type;
7265 break;
7266 case HCI_EV_LE_EXT_ADV_REPORT:
7267 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7268 hdev->wake_addr_type = ext_adv->bdaddr_type;
7269 break;
7270 }
7271 }
7272 } else {
7273 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7274 }
7275
7276 unlock:
7277 hci_dev_unlock(hdev);
7278 }
7279
7280 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7281 [_op] = { \
7282 .req = false, \
7283 .func = _func, \
7284 .min_len = _min_len, \
7285 .max_len = _max_len, \
7286 }
7287
7288 #define HCI_EV(_op, _func, _len) \
7289 HCI_EV_VL(_op, _func, _len, _len)
7290
7291 #define HCI_EV_STATUS(_op, _func) \
7292 HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7293
7294 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7295 [_op] = { \
7296 .req = true, \
7297 .func_req = _func, \
7298 .min_len = _min_len, \
7299 .max_len = _max_len, \
7300 }
7301
7302 #define HCI_EV_REQ(_op, _func, _len) \
7303 HCI_EV_REQ_VL(_op, _func, _len, _len)
7304
7305 /* Entries in this table shall have their position according to the event opcode
7306 * they handle so the use of the macros above is recommend since it does attempt
7307 * to initialize at its proper index using Designated Initializers that way
7308 * events without a callback function don't have entered.
7309 */
7310 static const struct hci_ev {
7311 bool req;
7312 union {
7313 void (*func)(struct hci_dev *hdev, void *data,
7314 struct sk_buff *skb);
7315 void (*func_req)(struct hci_dev *hdev, void *data,
7316 struct sk_buff *skb, u16 *opcode, u8 *status,
7317 hci_req_complete_t *req_complete,
7318 hci_req_complete_skb_t *req_complete_skb);
7319 };
7320 u16 min_len;
7321 u16 max_len;
7322 } hci_ev_table[U8_MAX + 1] = {
7323 /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7324 HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7325 /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7326 HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7327 sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7328 /* [0x03 = HCI_EV_CONN_COMPLETE] */
7329 HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7330 sizeof(struct hci_ev_conn_complete)),
7331 /* [0x04 = HCI_EV_CONN_REQUEST] */
7332 HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7333 sizeof(struct hci_ev_conn_request)),
7334 /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7335 HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7336 sizeof(struct hci_ev_disconn_complete)),
7337 /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7338 HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7339 sizeof(struct hci_ev_auth_complete)),
7340 /* [0x07 = HCI_EV_REMOTE_NAME] */
7341 HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7342 sizeof(struct hci_ev_remote_name)),
7343 /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7344 HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7345 sizeof(struct hci_ev_encrypt_change)),
7346 /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7347 HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7348 hci_change_link_key_complete_evt,
7349 sizeof(struct hci_ev_change_link_key_complete)),
7350 /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7351 HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7352 sizeof(struct hci_ev_remote_features)),
7353 /* [0x0e = HCI_EV_CMD_COMPLETE] */
7354 HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7355 sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7356 /* [0x0f = HCI_EV_CMD_STATUS] */
7357 HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7358 sizeof(struct hci_ev_cmd_status)),
7359 /* [0x10 = HCI_EV_CMD_STATUS] */
7360 HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7361 sizeof(struct hci_ev_hardware_error)),
7362 /* [0x12 = HCI_EV_ROLE_CHANGE] */
7363 HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7364 sizeof(struct hci_ev_role_change)),
7365 /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7366 HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7367 sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7368 /* [0x14 = HCI_EV_MODE_CHANGE] */
7369 HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7370 sizeof(struct hci_ev_mode_change)),
7371 /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7372 HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7373 sizeof(struct hci_ev_pin_code_req)),
7374 /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7375 HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7376 sizeof(struct hci_ev_link_key_req)),
7377 /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7378 HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7379 sizeof(struct hci_ev_link_key_notify)),
7380 /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7381 HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7382 sizeof(struct hci_ev_clock_offset)),
7383 /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7384 HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7385 sizeof(struct hci_ev_pkt_type_change)),
7386 /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7387 HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7388 sizeof(struct hci_ev_pscan_rep_mode)),
7389 /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7390 HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7391 hci_inquiry_result_with_rssi_evt,
7392 sizeof(struct hci_ev_inquiry_result_rssi),
7393 HCI_MAX_EVENT_SIZE),
7394 /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7395 HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7396 sizeof(struct hci_ev_remote_ext_features)),
7397 /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7398 HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7399 sizeof(struct hci_ev_sync_conn_complete)),
7400 /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7401 HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7402 hci_extended_inquiry_result_evt,
7403 sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7404 /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7405 HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7406 sizeof(struct hci_ev_key_refresh_complete)),
7407 /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7408 HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7409 sizeof(struct hci_ev_io_capa_request)),
7410 /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7411 HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7412 sizeof(struct hci_ev_io_capa_reply)),
7413 /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7414 HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7415 sizeof(struct hci_ev_user_confirm_req)),
7416 /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7417 HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7418 sizeof(struct hci_ev_user_passkey_req)),
7419 /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7420 HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7421 sizeof(struct hci_ev_remote_oob_data_request)),
7422 /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7423 HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7424 sizeof(struct hci_ev_simple_pair_complete)),
7425 /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7426 HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7427 sizeof(struct hci_ev_user_passkey_notify)),
7428 /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7429 HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7430 sizeof(struct hci_ev_keypress_notify)),
7431 /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7432 HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7433 sizeof(struct hci_ev_remote_host_features)),
7434 /* [0x3e = HCI_EV_LE_META] */
7435 HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7436 sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7437 /* [0xff = HCI_EV_VENDOR] */
7438 HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7439 };
7440
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)7441 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7442 u16 *opcode, u8 *status,
7443 hci_req_complete_t *req_complete,
7444 hci_req_complete_skb_t *req_complete_skb)
7445 {
7446 const struct hci_ev *ev = &hci_ev_table[event];
7447 void *data;
7448
7449 if (!ev->func)
7450 return;
7451
7452 if (skb->len < ev->min_len) {
7453 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7454 event, skb->len, ev->min_len);
7455 return;
7456 }
7457
7458 /* Just warn if the length is over max_len size it still be
7459 * possible to partially parse the event so leave to callback to
7460 * decide if that is acceptable.
7461 */
7462 if (skb->len > ev->max_len)
7463 bt_dev_warn_ratelimited(hdev,
7464 "unexpected event 0x%2.2x length: %u > %u",
7465 event, skb->len, ev->max_len);
7466
7467 data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7468 if (!data)
7469 return;
7470
7471 if (ev->req)
7472 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7473 req_complete_skb);
7474 else
7475 ev->func(hdev, data, skb);
7476 }
7477
hci_event_packet(struct hci_dev * hdev,struct sk_buff * skb)7478 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7479 {
7480 struct hci_event_hdr *hdr = (void *) skb->data;
7481 hci_req_complete_t req_complete = NULL;
7482 hci_req_complete_skb_t req_complete_skb = NULL;
7483 struct sk_buff *orig_skb = NULL;
7484 u8 status = 0, event, req_evt = 0;
7485 u16 opcode = HCI_OP_NOP;
7486
7487 if (skb->len < sizeof(*hdr)) {
7488 bt_dev_err(hdev, "Malformed HCI Event");
7489 goto done;
7490 }
7491
7492 hci_dev_lock(hdev);
7493 kfree_skb(hdev->recv_event);
7494 hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7495 hci_dev_unlock(hdev);
7496
7497 event = hdr->evt;
7498 if (!event) {
7499 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7500 event);
7501 goto done;
7502 }
7503
7504 /* Only match event if command OGF is not for LE */
7505 if (hdev->req_skb &&
7506 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) != 0x08 &&
7507 hci_skb_event(hdev->req_skb) == event) {
7508 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->req_skb),
7509 status, &req_complete, &req_complete_skb);
7510 req_evt = event;
7511 }
7512
7513 /* If it looks like we might end up having to call
7514 * req_complete_skb, store a pristine copy of the skb since the
7515 * various handlers may modify the original one through
7516 * skb_pull() calls, etc.
7517 */
7518 if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7519 event == HCI_EV_CMD_COMPLETE)
7520 orig_skb = skb_clone(skb, GFP_KERNEL);
7521
7522 skb_pull(skb, HCI_EVENT_HDR_SIZE);
7523
7524 /* Store wake reason if we're suspended */
7525 hci_store_wake_reason(hdev, event, skb);
7526
7527 bt_dev_dbg(hdev, "event 0x%2.2x", event);
7528
7529 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7530 &req_complete_skb);
7531
7532 if (req_complete) {
7533 req_complete(hdev, status, opcode);
7534 } else if (req_complete_skb) {
7535 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7536 kfree_skb(orig_skb);
7537 orig_skb = NULL;
7538 }
7539 req_complete_skb(hdev, status, opcode, orig_skb);
7540 }
7541
7542 done:
7543 kfree_skb(orig_skb);
7544 kfree_skb(skb);
7545 hdev->stat.evt_rx++;
7546 }
7547