1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
4 Copyright 2023 NXP
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24 */
25
26 /* Bluetooth HCI event handling. */
27
28 #include <asm/unaligned.h>
29 #include <linux/crypto.h>
30 #include <crypto/algapi.h>
31
32 #include <net/bluetooth/bluetooth.h>
33 #include <net/bluetooth/hci_core.h>
34 #include <net/bluetooth/mgmt.h>
35
36 #include "hci_request.h"
37 #include "hci_debugfs.h"
38 #include "hci_codec.h"
39 #include "smp.h"
40 #include "msft.h"
41 #include "eir.h"
42
43 #define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
44 "\x00\x00\x00\x00\x00\x00\x00\x00"
45
46 #define secs_to_jiffies(_secs) msecs_to_jiffies((_secs) * 1000)
47
48 /* Handle HCI Event packets */
49
hci_ev_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u8 ev,size_t len)50 static void *hci_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
51 u8 ev, size_t len)
52 {
53 void *data;
54
55 data = skb_pull_data(skb, len);
56 if (!data)
57 bt_dev_err(hdev, "Malformed Event: 0x%2.2x", ev);
58
59 return data;
60 }
61
hci_cc_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u16 op,size_t len)62 static void *hci_cc_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
63 u16 op, size_t len)
64 {
65 void *data;
66
67 data = skb_pull_data(skb, len);
68 if (!data)
69 bt_dev_err(hdev, "Malformed Command Complete: 0x%4.4x", op);
70
71 return data;
72 }
73
hci_le_ev_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u8 ev,size_t len)74 static void *hci_le_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
75 u8 ev, size_t len)
76 {
77 void *data;
78
79 data = skb_pull_data(skb, len);
80 if (!data)
81 bt_dev_err(hdev, "Malformed LE Event: 0x%2.2x", ev);
82
83 return data;
84 }
85
hci_cc_inquiry_cancel(struct hci_dev * hdev,void * data,struct sk_buff * skb)86 static u8 hci_cc_inquiry_cancel(struct hci_dev *hdev, void *data,
87 struct sk_buff *skb)
88 {
89 struct hci_ev_status *rp = data;
90
91 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
92
93 /* It is possible that we receive Inquiry Complete event right
94 * before we receive Inquiry Cancel Command Complete event, in
95 * which case the latter event should have status of Command
96 * Disallowed. This should not be treated as error, since
97 * we actually achieve what Inquiry Cancel wants to achieve,
98 * which is to end the last Inquiry session.
99 */
100 if (rp->status == HCI_ERROR_COMMAND_DISALLOWED && !test_bit(HCI_INQUIRY, &hdev->flags)) {
101 bt_dev_warn(hdev, "Ignoring error of Inquiry Cancel command");
102 rp->status = 0x00;
103 }
104
105 if (rp->status)
106 return rp->status;
107
108 clear_bit(HCI_INQUIRY, &hdev->flags);
109 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
110 wake_up_bit(&hdev->flags, HCI_INQUIRY);
111
112 hci_dev_lock(hdev);
113 /* Set discovery state to stopped if we're not doing LE active
114 * scanning.
115 */
116 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
117 hdev->le_scan_type != LE_SCAN_ACTIVE)
118 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
119 hci_dev_unlock(hdev);
120
121 return rp->status;
122 }
123
hci_cc_periodic_inq(struct hci_dev * hdev,void * data,struct sk_buff * skb)124 static u8 hci_cc_periodic_inq(struct hci_dev *hdev, void *data,
125 struct sk_buff *skb)
126 {
127 struct hci_ev_status *rp = data;
128
129 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
130
131 if (rp->status)
132 return rp->status;
133
134 hci_dev_set_flag(hdev, HCI_PERIODIC_INQ);
135
136 return rp->status;
137 }
138
hci_cc_exit_periodic_inq(struct hci_dev * hdev,void * data,struct sk_buff * skb)139 static u8 hci_cc_exit_periodic_inq(struct hci_dev *hdev, void *data,
140 struct sk_buff *skb)
141 {
142 struct hci_ev_status *rp = data;
143
144 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
145
146 if (rp->status)
147 return rp->status;
148
149 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);
150
151 return rp->status;
152 }
153
hci_cc_remote_name_req_cancel(struct hci_dev * hdev,void * data,struct sk_buff * skb)154 static u8 hci_cc_remote_name_req_cancel(struct hci_dev *hdev, void *data,
155 struct sk_buff *skb)
156 {
157 struct hci_ev_status *rp = data;
158
159 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
160
161 return rp->status;
162 }
163
hci_cc_role_discovery(struct hci_dev * hdev,void * data,struct sk_buff * skb)164 static u8 hci_cc_role_discovery(struct hci_dev *hdev, void *data,
165 struct sk_buff *skb)
166 {
167 struct hci_rp_role_discovery *rp = data;
168 struct hci_conn *conn;
169
170 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
171
172 if (rp->status)
173 return rp->status;
174
175 hci_dev_lock(hdev);
176
177 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
178 if (conn)
179 conn->role = rp->role;
180
181 hci_dev_unlock(hdev);
182
183 return rp->status;
184 }
185
hci_cc_read_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)186 static u8 hci_cc_read_link_policy(struct hci_dev *hdev, void *data,
187 struct sk_buff *skb)
188 {
189 struct hci_rp_read_link_policy *rp = data;
190 struct hci_conn *conn;
191
192 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
193
194 if (rp->status)
195 return rp->status;
196
197 hci_dev_lock(hdev);
198
199 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
200 if (conn)
201 conn->link_policy = __le16_to_cpu(rp->policy);
202
203 hci_dev_unlock(hdev);
204
205 return rp->status;
206 }
207
hci_cc_write_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)208 static u8 hci_cc_write_link_policy(struct hci_dev *hdev, void *data,
209 struct sk_buff *skb)
210 {
211 struct hci_rp_write_link_policy *rp = data;
212 struct hci_conn *conn;
213 void *sent;
214
215 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
216
217 if (rp->status)
218 return rp->status;
219
220 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY);
221 if (!sent)
222 return rp->status;
223
224 hci_dev_lock(hdev);
225
226 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
227 if (conn)
228 conn->link_policy = get_unaligned_le16(sent + 2);
229
230 hci_dev_unlock(hdev);
231
232 return rp->status;
233 }
234
hci_cc_read_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)235 static u8 hci_cc_read_def_link_policy(struct hci_dev *hdev, void *data,
236 struct sk_buff *skb)
237 {
238 struct hci_rp_read_def_link_policy *rp = data;
239
240 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
241
242 if (rp->status)
243 return rp->status;
244
245 hdev->link_policy = __le16_to_cpu(rp->policy);
246
247 return rp->status;
248 }
249
hci_cc_write_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)250 static u8 hci_cc_write_def_link_policy(struct hci_dev *hdev, void *data,
251 struct sk_buff *skb)
252 {
253 struct hci_ev_status *rp = data;
254 void *sent;
255
256 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
257
258 if (rp->status)
259 return rp->status;
260
261 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY);
262 if (!sent)
263 return rp->status;
264
265 hdev->link_policy = get_unaligned_le16(sent);
266
267 return rp->status;
268 }
269
hci_cc_reset(struct hci_dev * hdev,void * data,struct sk_buff * skb)270 static u8 hci_cc_reset(struct hci_dev *hdev, void *data, struct sk_buff *skb)
271 {
272 struct hci_ev_status *rp = data;
273
274 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
275
276 clear_bit(HCI_RESET, &hdev->flags);
277
278 if (rp->status)
279 return rp->status;
280
281 /* Reset all non-persistent flags */
282 hci_dev_clear_volatile_flags(hdev);
283
284 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
285
286 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
287 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
288
289 memset(hdev->adv_data, 0, sizeof(hdev->adv_data));
290 hdev->adv_data_len = 0;
291
292 memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data));
293 hdev->scan_rsp_data_len = 0;
294
295 hdev->le_scan_type = LE_SCAN_PASSIVE;
296
297 hdev->ssp_debug_mode = 0;
298
299 hci_bdaddr_list_clear(&hdev->le_accept_list);
300 hci_bdaddr_list_clear(&hdev->le_resolv_list);
301
302 return rp->status;
303 }
304
hci_cc_read_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)305 static u8 hci_cc_read_stored_link_key(struct hci_dev *hdev, void *data,
306 struct sk_buff *skb)
307 {
308 struct hci_rp_read_stored_link_key *rp = data;
309 struct hci_cp_read_stored_link_key *sent;
310
311 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
312
313 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY);
314 if (!sent)
315 return rp->status;
316
317 if (!rp->status && sent->read_all == 0x01) {
318 hdev->stored_max_keys = le16_to_cpu(rp->max_keys);
319 hdev->stored_num_keys = le16_to_cpu(rp->num_keys);
320 }
321
322 return rp->status;
323 }
324
hci_cc_delete_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)325 static u8 hci_cc_delete_stored_link_key(struct hci_dev *hdev, void *data,
326 struct sk_buff *skb)
327 {
328 struct hci_rp_delete_stored_link_key *rp = data;
329 u16 num_keys;
330
331 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
332
333 if (rp->status)
334 return rp->status;
335
336 num_keys = le16_to_cpu(rp->num_keys);
337
338 if (num_keys <= hdev->stored_num_keys)
339 hdev->stored_num_keys -= num_keys;
340 else
341 hdev->stored_num_keys = 0;
342
343 return rp->status;
344 }
345
hci_cc_write_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)346 static u8 hci_cc_write_local_name(struct hci_dev *hdev, void *data,
347 struct sk_buff *skb)
348 {
349 struct hci_ev_status *rp = data;
350 void *sent;
351
352 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
353
354 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME);
355 if (!sent)
356 return rp->status;
357
358 hci_dev_lock(hdev);
359
360 if (hci_dev_test_flag(hdev, HCI_MGMT))
361 mgmt_set_local_name_complete(hdev, sent, rp->status);
362 else if (!rp->status)
363 memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH);
364
365 hci_dev_unlock(hdev);
366
367 return rp->status;
368 }
369
hci_cc_read_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)370 static u8 hci_cc_read_local_name(struct hci_dev *hdev, void *data,
371 struct sk_buff *skb)
372 {
373 struct hci_rp_read_local_name *rp = data;
374
375 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
376
377 if (rp->status)
378 return rp->status;
379
380 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
381 hci_dev_test_flag(hdev, HCI_CONFIG))
382 memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH);
383
384 return rp->status;
385 }
386
hci_cc_write_auth_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)387 static u8 hci_cc_write_auth_enable(struct hci_dev *hdev, void *data,
388 struct sk_buff *skb)
389 {
390 struct hci_ev_status *rp = data;
391 void *sent;
392
393 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
394
395 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE);
396 if (!sent)
397 return rp->status;
398
399 hci_dev_lock(hdev);
400
401 if (!rp->status) {
402 __u8 param = *((__u8 *) sent);
403
404 if (param == AUTH_ENABLED)
405 set_bit(HCI_AUTH, &hdev->flags);
406 else
407 clear_bit(HCI_AUTH, &hdev->flags);
408 }
409
410 if (hci_dev_test_flag(hdev, HCI_MGMT))
411 mgmt_auth_enable_complete(hdev, rp->status);
412
413 hci_dev_unlock(hdev);
414
415 return rp->status;
416 }
417
hci_cc_write_encrypt_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)418 static u8 hci_cc_write_encrypt_mode(struct hci_dev *hdev, void *data,
419 struct sk_buff *skb)
420 {
421 struct hci_ev_status *rp = data;
422 __u8 param;
423 void *sent;
424
425 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
426
427 if (rp->status)
428 return rp->status;
429
430 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE);
431 if (!sent)
432 return rp->status;
433
434 param = *((__u8 *) sent);
435
436 if (param)
437 set_bit(HCI_ENCRYPT, &hdev->flags);
438 else
439 clear_bit(HCI_ENCRYPT, &hdev->flags);
440
441 return rp->status;
442 }
443
hci_cc_write_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)444 static u8 hci_cc_write_scan_enable(struct hci_dev *hdev, void *data,
445 struct sk_buff *skb)
446 {
447 struct hci_ev_status *rp = data;
448 __u8 param;
449 void *sent;
450
451 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
452
453 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE);
454 if (!sent)
455 return rp->status;
456
457 param = *((__u8 *) sent);
458
459 hci_dev_lock(hdev);
460
461 if (rp->status) {
462 hdev->discov_timeout = 0;
463 goto done;
464 }
465
466 if (param & SCAN_INQUIRY)
467 set_bit(HCI_ISCAN, &hdev->flags);
468 else
469 clear_bit(HCI_ISCAN, &hdev->flags);
470
471 if (param & SCAN_PAGE)
472 set_bit(HCI_PSCAN, &hdev->flags);
473 else
474 clear_bit(HCI_PSCAN, &hdev->flags);
475
476 done:
477 hci_dev_unlock(hdev);
478
479 return rp->status;
480 }
481
hci_cc_set_event_filter(struct hci_dev * hdev,void * data,struct sk_buff * skb)482 static u8 hci_cc_set_event_filter(struct hci_dev *hdev, void *data,
483 struct sk_buff *skb)
484 {
485 struct hci_ev_status *rp = data;
486 struct hci_cp_set_event_filter *cp;
487 void *sent;
488
489 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
490
491 if (rp->status)
492 return rp->status;
493
494 sent = hci_sent_cmd_data(hdev, HCI_OP_SET_EVENT_FLT);
495 if (!sent)
496 return rp->status;
497
498 cp = (struct hci_cp_set_event_filter *)sent;
499
500 if (cp->flt_type == HCI_FLT_CLEAR_ALL)
501 hci_dev_clear_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
502 else
503 hci_dev_set_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
504
505 return rp->status;
506 }
507
hci_cc_read_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)508 static u8 hci_cc_read_class_of_dev(struct hci_dev *hdev, void *data,
509 struct sk_buff *skb)
510 {
511 struct hci_rp_read_class_of_dev *rp = data;
512
513 if (WARN_ON(!hdev))
514 return HCI_ERROR_UNSPECIFIED;
515
516 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
517
518 if (rp->status)
519 return rp->status;
520
521 memcpy(hdev->dev_class, rp->dev_class, 3);
522
523 bt_dev_dbg(hdev, "class 0x%.2x%.2x%.2x", hdev->dev_class[2],
524 hdev->dev_class[1], hdev->dev_class[0]);
525
526 return rp->status;
527 }
528
hci_cc_write_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)529 static u8 hci_cc_write_class_of_dev(struct hci_dev *hdev, void *data,
530 struct sk_buff *skb)
531 {
532 struct hci_ev_status *rp = data;
533 void *sent;
534
535 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
536
537 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV);
538 if (!sent)
539 return rp->status;
540
541 hci_dev_lock(hdev);
542
543 if (!rp->status)
544 memcpy(hdev->dev_class, sent, 3);
545
546 if (hci_dev_test_flag(hdev, HCI_MGMT))
547 mgmt_set_class_of_dev_complete(hdev, sent, rp->status);
548
549 hci_dev_unlock(hdev);
550
551 return rp->status;
552 }
553
hci_cc_read_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)554 static u8 hci_cc_read_voice_setting(struct hci_dev *hdev, void *data,
555 struct sk_buff *skb)
556 {
557 struct hci_rp_read_voice_setting *rp = data;
558 __u16 setting;
559
560 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
561
562 if (rp->status)
563 return rp->status;
564
565 setting = __le16_to_cpu(rp->voice_setting);
566
567 if (hdev->voice_setting == setting)
568 return rp->status;
569
570 hdev->voice_setting = setting;
571
572 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
573
574 if (hdev->notify)
575 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
576
577 return rp->status;
578 }
579
hci_cc_write_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)580 static u8 hci_cc_write_voice_setting(struct hci_dev *hdev, void *data,
581 struct sk_buff *skb)
582 {
583 struct hci_ev_status *rp = data;
584 __u16 setting;
585 void *sent;
586
587 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
588
589 if (rp->status)
590 return rp->status;
591
592 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING);
593 if (!sent)
594 return rp->status;
595
596 setting = get_unaligned_le16(sent);
597
598 if (hdev->voice_setting == setting)
599 return rp->status;
600
601 hdev->voice_setting = setting;
602
603 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
604
605 if (hdev->notify)
606 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
607
608 return rp->status;
609 }
610
hci_cc_read_num_supported_iac(struct hci_dev * hdev,void * data,struct sk_buff * skb)611 static u8 hci_cc_read_num_supported_iac(struct hci_dev *hdev, void *data,
612 struct sk_buff *skb)
613 {
614 struct hci_rp_read_num_supported_iac *rp = data;
615
616 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
617
618 if (rp->status)
619 return rp->status;
620
621 hdev->num_iac = rp->num_iac;
622
623 bt_dev_dbg(hdev, "num iac %d", hdev->num_iac);
624
625 return rp->status;
626 }
627
hci_cc_write_ssp_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)628 static u8 hci_cc_write_ssp_mode(struct hci_dev *hdev, void *data,
629 struct sk_buff *skb)
630 {
631 struct hci_ev_status *rp = data;
632 struct hci_cp_write_ssp_mode *sent;
633
634 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
635
636 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE);
637 if (!sent)
638 return rp->status;
639
640 hci_dev_lock(hdev);
641
642 if (!rp->status) {
643 if (sent->mode)
644 hdev->features[1][0] |= LMP_HOST_SSP;
645 else
646 hdev->features[1][0] &= ~LMP_HOST_SSP;
647 }
648
649 if (!rp->status) {
650 if (sent->mode)
651 hci_dev_set_flag(hdev, HCI_SSP_ENABLED);
652 else
653 hci_dev_clear_flag(hdev, HCI_SSP_ENABLED);
654 }
655
656 hci_dev_unlock(hdev);
657
658 return rp->status;
659 }
660
hci_cc_write_sc_support(struct hci_dev * hdev,void * data,struct sk_buff * skb)661 static u8 hci_cc_write_sc_support(struct hci_dev *hdev, void *data,
662 struct sk_buff *skb)
663 {
664 struct hci_ev_status *rp = data;
665 struct hci_cp_write_sc_support *sent;
666
667 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
668
669 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT);
670 if (!sent)
671 return rp->status;
672
673 hci_dev_lock(hdev);
674
675 if (!rp->status) {
676 if (sent->support)
677 hdev->features[1][0] |= LMP_HOST_SC;
678 else
679 hdev->features[1][0] &= ~LMP_HOST_SC;
680 }
681
682 if (!hci_dev_test_flag(hdev, HCI_MGMT) && !rp->status) {
683 if (sent->support)
684 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
685 else
686 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
687 }
688
689 hci_dev_unlock(hdev);
690
691 return rp->status;
692 }
693
hci_cc_read_local_version(struct hci_dev * hdev,void * data,struct sk_buff * skb)694 static u8 hci_cc_read_local_version(struct hci_dev *hdev, void *data,
695 struct sk_buff *skb)
696 {
697 struct hci_rp_read_local_version *rp = data;
698
699 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
700
701 if (rp->status)
702 return rp->status;
703
704 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
705 hci_dev_test_flag(hdev, HCI_CONFIG)) {
706 hdev->hci_ver = rp->hci_ver;
707 hdev->hci_rev = __le16_to_cpu(rp->hci_rev);
708 hdev->lmp_ver = rp->lmp_ver;
709 hdev->manufacturer = __le16_to_cpu(rp->manufacturer);
710 hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver);
711 }
712
713 return rp->status;
714 }
715
hci_cc_read_enc_key_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)716 static u8 hci_cc_read_enc_key_size(struct hci_dev *hdev, void *data,
717 struct sk_buff *skb)
718 {
719 struct hci_rp_read_enc_key_size *rp = data;
720 struct hci_conn *conn;
721 u16 handle;
722 u8 status = rp->status;
723
724 bt_dev_dbg(hdev, "status 0x%2.2x", status);
725
726 handle = le16_to_cpu(rp->handle);
727
728 hci_dev_lock(hdev);
729
730 conn = hci_conn_hash_lookup_handle(hdev, handle);
731 if (!conn) {
732 status = 0xFF;
733 goto done;
734 }
735
736 /* While unexpected, the read_enc_key_size command may fail. The most
737 * secure approach is to then assume the key size is 0 to force a
738 * disconnection.
739 */
740 if (status) {
741 bt_dev_err(hdev, "failed to read key size for handle %u",
742 handle);
743 conn->enc_key_size = 0;
744 } else {
745 conn->enc_key_size = rp->key_size;
746 status = 0;
747
748 if (conn->enc_key_size < hdev->min_enc_key_size) {
749 /* As slave role, the conn->state has been set to
750 * BT_CONNECTED and l2cap conn req might not be received
751 * yet, at this moment the l2cap layer almost does
752 * nothing with the non-zero status.
753 * So we also clear encrypt related bits, and then the
754 * handler of l2cap conn req will get the right secure
755 * state at a later time.
756 */
757 status = HCI_ERROR_AUTH_FAILURE;
758 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
759 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
760 }
761 }
762
763 hci_encrypt_cfm(conn, status);
764
765 done:
766 hci_dev_unlock(hdev);
767
768 return status;
769 }
770
hci_cc_read_local_commands(struct hci_dev * hdev,void * data,struct sk_buff * skb)771 static u8 hci_cc_read_local_commands(struct hci_dev *hdev, void *data,
772 struct sk_buff *skb)
773 {
774 struct hci_rp_read_local_commands *rp = data;
775
776 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
777
778 if (rp->status)
779 return rp->status;
780
781 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
782 hci_dev_test_flag(hdev, HCI_CONFIG))
783 memcpy(hdev->commands, rp->commands, sizeof(hdev->commands));
784
785 return rp->status;
786 }
787
hci_cc_read_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)788 static u8 hci_cc_read_auth_payload_timeout(struct hci_dev *hdev, void *data,
789 struct sk_buff *skb)
790 {
791 struct hci_rp_read_auth_payload_to *rp = data;
792 struct hci_conn *conn;
793
794 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
795
796 if (rp->status)
797 return rp->status;
798
799 hci_dev_lock(hdev);
800
801 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
802 if (conn)
803 conn->auth_payload_timeout = __le16_to_cpu(rp->timeout);
804
805 hci_dev_unlock(hdev);
806
807 return rp->status;
808 }
809
hci_cc_write_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)810 static u8 hci_cc_write_auth_payload_timeout(struct hci_dev *hdev, void *data,
811 struct sk_buff *skb)
812 {
813 struct hci_rp_write_auth_payload_to *rp = data;
814 struct hci_conn *conn;
815 void *sent;
816
817 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
818
819 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO);
820 if (!sent)
821 return rp->status;
822
823 hci_dev_lock(hdev);
824
825 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
826 if (!conn) {
827 rp->status = 0xff;
828 goto unlock;
829 }
830
831 if (!rp->status)
832 conn->auth_payload_timeout = get_unaligned_le16(sent + 2);
833
834 unlock:
835 hci_dev_unlock(hdev);
836
837 return rp->status;
838 }
839
hci_cc_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)840 static u8 hci_cc_read_local_features(struct hci_dev *hdev, void *data,
841 struct sk_buff *skb)
842 {
843 struct hci_rp_read_local_features *rp = data;
844
845 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
846
847 if (rp->status)
848 return rp->status;
849
850 memcpy(hdev->features, rp->features, 8);
851
852 /* Adjust default settings according to features
853 * supported by device. */
854
855 if (hdev->features[0][0] & LMP_3SLOT)
856 hdev->pkt_type |= (HCI_DM3 | HCI_DH3);
857
858 if (hdev->features[0][0] & LMP_5SLOT)
859 hdev->pkt_type |= (HCI_DM5 | HCI_DH5);
860
861 if (hdev->features[0][1] & LMP_HV2) {
862 hdev->pkt_type |= (HCI_HV2);
863 hdev->esco_type |= (ESCO_HV2);
864 }
865
866 if (hdev->features[0][1] & LMP_HV3) {
867 hdev->pkt_type |= (HCI_HV3);
868 hdev->esco_type |= (ESCO_HV3);
869 }
870
871 if (lmp_esco_capable(hdev))
872 hdev->esco_type |= (ESCO_EV3);
873
874 if (hdev->features[0][4] & LMP_EV4)
875 hdev->esco_type |= (ESCO_EV4);
876
877 if (hdev->features[0][4] & LMP_EV5)
878 hdev->esco_type |= (ESCO_EV5);
879
880 if (hdev->features[0][5] & LMP_EDR_ESCO_2M)
881 hdev->esco_type |= (ESCO_2EV3);
882
883 if (hdev->features[0][5] & LMP_EDR_ESCO_3M)
884 hdev->esco_type |= (ESCO_3EV3);
885
886 if (hdev->features[0][5] & LMP_EDR_3S_ESCO)
887 hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5);
888
889 return rp->status;
890 }
891
hci_cc_read_local_ext_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)892 static u8 hci_cc_read_local_ext_features(struct hci_dev *hdev, void *data,
893 struct sk_buff *skb)
894 {
895 struct hci_rp_read_local_ext_features *rp = data;
896
897 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
898
899 if (rp->status)
900 return rp->status;
901
902 if (hdev->max_page < rp->max_page) {
903 if (test_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2,
904 &hdev->quirks))
905 bt_dev_warn(hdev, "broken local ext features page 2");
906 else
907 hdev->max_page = rp->max_page;
908 }
909
910 if (rp->page < HCI_MAX_PAGES)
911 memcpy(hdev->features[rp->page], rp->features, 8);
912
913 return rp->status;
914 }
915
hci_cc_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)916 static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data,
917 struct sk_buff *skb)
918 {
919 struct hci_rp_read_buffer_size *rp = data;
920
921 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
922
923 if (rp->status)
924 return rp->status;
925
926 hdev->acl_mtu = __le16_to_cpu(rp->acl_mtu);
927 hdev->sco_mtu = rp->sco_mtu;
928 hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt);
929 hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt);
930
931 if (test_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks)) {
932 hdev->sco_mtu = 64;
933 hdev->sco_pkts = 8;
934 }
935
936 hdev->acl_cnt = hdev->acl_pkts;
937 hdev->sco_cnt = hdev->sco_pkts;
938
939 BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu,
940 hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts);
941
942 if (!hdev->acl_mtu || !hdev->acl_pkts)
943 return HCI_ERROR_INVALID_PARAMETERS;
944
945 return rp->status;
946 }
947
hci_cc_read_bd_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)948 static u8 hci_cc_read_bd_addr(struct hci_dev *hdev, void *data,
949 struct sk_buff *skb)
950 {
951 struct hci_rp_read_bd_addr *rp = data;
952
953 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
954
955 if (rp->status)
956 return rp->status;
957
958 if (test_bit(HCI_INIT, &hdev->flags))
959 bacpy(&hdev->bdaddr, &rp->bdaddr);
960
961 if (hci_dev_test_flag(hdev, HCI_SETUP))
962 bacpy(&hdev->setup_addr, &rp->bdaddr);
963
964 return rp->status;
965 }
966
hci_cc_read_local_pairing_opts(struct hci_dev * hdev,void * data,struct sk_buff * skb)967 static u8 hci_cc_read_local_pairing_opts(struct hci_dev *hdev, void *data,
968 struct sk_buff *skb)
969 {
970 struct hci_rp_read_local_pairing_opts *rp = data;
971
972 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
973
974 if (rp->status)
975 return rp->status;
976
977 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
978 hci_dev_test_flag(hdev, HCI_CONFIG)) {
979 hdev->pairing_opts = rp->pairing_opts;
980 hdev->max_enc_key_size = rp->max_key_size;
981 }
982
983 return rp->status;
984 }
985
hci_cc_read_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)986 static u8 hci_cc_read_page_scan_activity(struct hci_dev *hdev, void *data,
987 struct sk_buff *skb)
988 {
989 struct hci_rp_read_page_scan_activity *rp = data;
990
991 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
992
993 if (rp->status)
994 return rp->status;
995
996 if (test_bit(HCI_INIT, &hdev->flags)) {
997 hdev->page_scan_interval = __le16_to_cpu(rp->interval);
998 hdev->page_scan_window = __le16_to_cpu(rp->window);
999 }
1000
1001 return rp->status;
1002 }
1003
hci_cc_write_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)1004 static u8 hci_cc_write_page_scan_activity(struct hci_dev *hdev, void *data,
1005 struct sk_buff *skb)
1006 {
1007 struct hci_ev_status *rp = data;
1008 struct hci_cp_write_page_scan_activity *sent;
1009
1010 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1011
1012 if (rp->status)
1013 return rp->status;
1014
1015 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY);
1016 if (!sent)
1017 return rp->status;
1018
1019 hdev->page_scan_interval = __le16_to_cpu(sent->interval);
1020 hdev->page_scan_window = __le16_to_cpu(sent->window);
1021
1022 return rp->status;
1023 }
1024
hci_cc_read_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1025 static u8 hci_cc_read_page_scan_type(struct hci_dev *hdev, void *data,
1026 struct sk_buff *skb)
1027 {
1028 struct hci_rp_read_page_scan_type *rp = data;
1029
1030 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1031
1032 if (rp->status)
1033 return rp->status;
1034
1035 if (test_bit(HCI_INIT, &hdev->flags))
1036 hdev->page_scan_type = rp->type;
1037
1038 return rp->status;
1039 }
1040
hci_cc_write_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1041 static u8 hci_cc_write_page_scan_type(struct hci_dev *hdev, void *data,
1042 struct sk_buff *skb)
1043 {
1044 struct hci_ev_status *rp = data;
1045 u8 *type;
1046
1047 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1048
1049 if (rp->status)
1050 return rp->status;
1051
1052 type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE);
1053 if (type)
1054 hdev->page_scan_type = *type;
1055
1056 return rp->status;
1057 }
1058
hci_cc_read_clock(struct hci_dev * hdev,void * data,struct sk_buff * skb)1059 static u8 hci_cc_read_clock(struct hci_dev *hdev, void *data,
1060 struct sk_buff *skb)
1061 {
1062 struct hci_rp_read_clock *rp = data;
1063 struct hci_cp_read_clock *cp;
1064 struct hci_conn *conn;
1065
1066 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1067
1068 if (rp->status)
1069 return rp->status;
1070
1071 hci_dev_lock(hdev);
1072
1073 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
1074 if (!cp)
1075 goto unlock;
1076
1077 if (cp->which == 0x00) {
1078 hdev->clock = le32_to_cpu(rp->clock);
1079 goto unlock;
1080 }
1081
1082 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
1083 if (conn) {
1084 conn->clock = le32_to_cpu(rp->clock);
1085 conn->clock_accuracy = le16_to_cpu(rp->accuracy);
1086 }
1087
1088 unlock:
1089 hci_dev_unlock(hdev);
1090 return rp->status;
1091 }
1092
hci_cc_read_inq_rsp_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1093 static u8 hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev, void *data,
1094 struct sk_buff *skb)
1095 {
1096 struct hci_rp_read_inq_rsp_tx_power *rp = data;
1097
1098 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1099
1100 if (rp->status)
1101 return rp->status;
1102
1103 hdev->inq_tx_power = rp->tx_power;
1104
1105 return rp->status;
1106 }
1107
hci_cc_read_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1108 static u8 hci_cc_read_def_err_data_reporting(struct hci_dev *hdev, void *data,
1109 struct sk_buff *skb)
1110 {
1111 struct hci_rp_read_def_err_data_reporting *rp = data;
1112
1113 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1114
1115 if (rp->status)
1116 return rp->status;
1117
1118 hdev->err_data_reporting = rp->err_data_reporting;
1119
1120 return rp->status;
1121 }
1122
hci_cc_write_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1123 static u8 hci_cc_write_def_err_data_reporting(struct hci_dev *hdev, void *data,
1124 struct sk_buff *skb)
1125 {
1126 struct hci_ev_status *rp = data;
1127 struct hci_cp_write_def_err_data_reporting *cp;
1128
1129 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1130
1131 if (rp->status)
1132 return rp->status;
1133
1134 cp = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING);
1135 if (!cp)
1136 return rp->status;
1137
1138 hdev->err_data_reporting = cp->err_data_reporting;
1139
1140 return rp->status;
1141 }
1142
hci_cc_pin_code_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1143 static u8 hci_cc_pin_code_reply(struct hci_dev *hdev, void *data,
1144 struct sk_buff *skb)
1145 {
1146 struct hci_rp_pin_code_reply *rp = data;
1147 struct hci_cp_pin_code_reply *cp;
1148 struct hci_conn *conn;
1149
1150 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1151
1152 hci_dev_lock(hdev);
1153
1154 if (hci_dev_test_flag(hdev, HCI_MGMT))
1155 mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status);
1156
1157 if (rp->status)
1158 goto unlock;
1159
1160 cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY);
1161 if (!cp)
1162 goto unlock;
1163
1164 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
1165 if (conn)
1166 conn->pin_length = cp->pin_len;
1167
1168 unlock:
1169 hci_dev_unlock(hdev);
1170 return rp->status;
1171 }
1172
hci_cc_pin_code_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1173 static u8 hci_cc_pin_code_neg_reply(struct hci_dev *hdev, void *data,
1174 struct sk_buff *skb)
1175 {
1176 struct hci_rp_pin_code_neg_reply *rp = data;
1177
1178 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1179
1180 hci_dev_lock(hdev);
1181
1182 if (hci_dev_test_flag(hdev, HCI_MGMT))
1183 mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr,
1184 rp->status);
1185
1186 hci_dev_unlock(hdev);
1187
1188 return rp->status;
1189 }
1190
hci_cc_le_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1191 static u8 hci_cc_le_read_buffer_size(struct hci_dev *hdev, void *data,
1192 struct sk_buff *skb)
1193 {
1194 struct hci_rp_le_read_buffer_size *rp = data;
1195
1196 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1197
1198 if (rp->status)
1199 return rp->status;
1200
1201 hdev->le_mtu = __le16_to_cpu(rp->le_mtu);
1202 hdev->le_pkts = rp->le_max_pkt;
1203
1204 hdev->le_cnt = hdev->le_pkts;
1205
1206 BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts);
1207
1208 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
1209 return HCI_ERROR_INVALID_PARAMETERS;
1210
1211 return rp->status;
1212 }
1213
hci_cc_le_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)1214 static u8 hci_cc_le_read_local_features(struct hci_dev *hdev, void *data,
1215 struct sk_buff *skb)
1216 {
1217 struct hci_rp_le_read_local_features *rp = data;
1218
1219 BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1220
1221 if (rp->status)
1222 return rp->status;
1223
1224 memcpy(hdev->le_features, rp->features, 8);
1225
1226 return rp->status;
1227 }
1228
hci_cc_le_read_adv_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1229 static u8 hci_cc_le_read_adv_tx_power(struct hci_dev *hdev, void *data,
1230 struct sk_buff *skb)
1231 {
1232 struct hci_rp_le_read_adv_tx_power *rp = data;
1233
1234 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1235
1236 if (rp->status)
1237 return rp->status;
1238
1239 hdev->adv_tx_power = rp->tx_power;
1240
1241 return rp->status;
1242 }
1243
hci_cc_user_confirm_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1244 static u8 hci_cc_user_confirm_reply(struct hci_dev *hdev, void *data,
1245 struct sk_buff *skb)
1246 {
1247 struct hci_rp_user_confirm_reply *rp = data;
1248
1249 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1250
1251 hci_dev_lock(hdev);
1252
1253 if (hci_dev_test_flag(hdev, HCI_MGMT))
1254 mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0,
1255 rp->status);
1256
1257 hci_dev_unlock(hdev);
1258
1259 return rp->status;
1260 }
1261
hci_cc_user_confirm_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1262 static u8 hci_cc_user_confirm_neg_reply(struct hci_dev *hdev, void *data,
1263 struct sk_buff *skb)
1264 {
1265 struct hci_rp_user_confirm_reply *rp = data;
1266
1267 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1268
1269 hci_dev_lock(hdev);
1270
1271 if (hci_dev_test_flag(hdev, HCI_MGMT))
1272 mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr,
1273 ACL_LINK, 0, rp->status);
1274
1275 hci_dev_unlock(hdev);
1276
1277 return rp->status;
1278 }
1279
hci_cc_user_passkey_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1280 static u8 hci_cc_user_passkey_reply(struct hci_dev *hdev, void *data,
1281 struct sk_buff *skb)
1282 {
1283 struct hci_rp_user_confirm_reply *rp = data;
1284
1285 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1286
1287 hci_dev_lock(hdev);
1288
1289 if (hci_dev_test_flag(hdev, HCI_MGMT))
1290 mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK,
1291 0, rp->status);
1292
1293 hci_dev_unlock(hdev);
1294
1295 return rp->status;
1296 }
1297
hci_cc_user_passkey_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1298 static u8 hci_cc_user_passkey_neg_reply(struct hci_dev *hdev, void *data,
1299 struct sk_buff *skb)
1300 {
1301 struct hci_rp_user_confirm_reply *rp = data;
1302
1303 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1304
1305 hci_dev_lock(hdev);
1306
1307 if (hci_dev_test_flag(hdev, HCI_MGMT))
1308 mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr,
1309 ACL_LINK, 0, rp->status);
1310
1311 hci_dev_unlock(hdev);
1312
1313 return rp->status;
1314 }
1315
hci_cc_read_local_oob_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1316 static u8 hci_cc_read_local_oob_data(struct hci_dev *hdev, void *data,
1317 struct sk_buff *skb)
1318 {
1319 struct hci_rp_read_local_oob_data *rp = data;
1320
1321 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1322
1323 return rp->status;
1324 }
1325
hci_cc_read_local_oob_ext_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1326 static u8 hci_cc_read_local_oob_ext_data(struct hci_dev *hdev, void *data,
1327 struct sk_buff *skb)
1328 {
1329 struct hci_rp_read_local_oob_ext_data *rp = data;
1330
1331 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1332
1333 return rp->status;
1334 }
1335
hci_cc_le_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1336 static u8 hci_cc_le_set_random_addr(struct hci_dev *hdev, void *data,
1337 struct sk_buff *skb)
1338 {
1339 struct hci_ev_status *rp = data;
1340 bdaddr_t *sent;
1341
1342 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1343
1344 if (rp->status)
1345 return rp->status;
1346
1347 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR);
1348 if (!sent)
1349 return rp->status;
1350
1351 hci_dev_lock(hdev);
1352
1353 bacpy(&hdev->random_addr, sent);
1354
1355 if (!bacmp(&hdev->rpa, sent)) {
1356 hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED);
1357 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired,
1358 secs_to_jiffies(hdev->rpa_timeout));
1359 }
1360
1361 hci_dev_unlock(hdev);
1362
1363 return rp->status;
1364 }
1365
hci_cc_le_set_default_phy(struct hci_dev * hdev,void * data,struct sk_buff * skb)1366 static u8 hci_cc_le_set_default_phy(struct hci_dev *hdev, void *data,
1367 struct sk_buff *skb)
1368 {
1369 struct hci_ev_status *rp = data;
1370 struct hci_cp_le_set_default_phy *cp;
1371
1372 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1373
1374 if (rp->status)
1375 return rp->status;
1376
1377 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY);
1378 if (!cp)
1379 return rp->status;
1380
1381 hci_dev_lock(hdev);
1382
1383 hdev->le_tx_def_phys = cp->tx_phys;
1384 hdev->le_rx_def_phys = cp->rx_phys;
1385
1386 hci_dev_unlock(hdev);
1387
1388 return rp->status;
1389 }
1390
hci_cc_le_set_adv_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1391 static u8 hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, void *data,
1392 struct sk_buff *skb)
1393 {
1394 struct hci_ev_status *rp = data;
1395 struct hci_cp_le_set_adv_set_rand_addr *cp;
1396 struct adv_info *adv;
1397
1398 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1399
1400 if (rp->status)
1401 return rp->status;
1402
1403 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR);
1404 /* Update only in case the adv instance since handle 0x00 shall be using
1405 * HCI_OP_LE_SET_RANDOM_ADDR since that allows both extended and
1406 * non-extended adverting.
1407 */
1408 if (!cp || !cp->handle)
1409 return rp->status;
1410
1411 hci_dev_lock(hdev);
1412
1413 adv = hci_find_adv_instance(hdev, cp->handle);
1414 if (adv) {
1415 bacpy(&adv->random_addr, &cp->bdaddr);
1416 if (!bacmp(&hdev->rpa, &cp->bdaddr)) {
1417 adv->rpa_expired = false;
1418 queue_delayed_work(hdev->workqueue,
1419 &adv->rpa_expired_cb,
1420 secs_to_jiffies(hdev->rpa_timeout));
1421 }
1422 }
1423
1424 hci_dev_unlock(hdev);
1425
1426 return rp->status;
1427 }
1428
hci_cc_le_remove_adv_set(struct hci_dev * hdev,void * data,struct sk_buff * skb)1429 static u8 hci_cc_le_remove_adv_set(struct hci_dev *hdev, void *data,
1430 struct sk_buff *skb)
1431 {
1432 struct hci_ev_status *rp = data;
1433 u8 *instance;
1434 int err;
1435
1436 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1437
1438 if (rp->status)
1439 return rp->status;
1440
1441 instance = hci_sent_cmd_data(hdev, HCI_OP_LE_REMOVE_ADV_SET);
1442 if (!instance)
1443 return rp->status;
1444
1445 hci_dev_lock(hdev);
1446
1447 err = hci_remove_adv_instance(hdev, *instance);
1448 if (!err)
1449 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), hdev,
1450 *instance);
1451
1452 hci_dev_unlock(hdev);
1453
1454 return rp->status;
1455 }
1456
hci_cc_le_clear_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1457 static u8 hci_cc_le_clear_adv_sets(struct hci_dev *hdev, void *data,
1458 struct sk_buff *skb)
1459 {
1460 struct hci_ev_status *rp = data;
1461 struct adv_info *adv, *n;
1462 int err;
1463
1464 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1465
1466 if (rp->status)
1467 return rp->status;
1468
1469 if (!hci_sent_cmd_data(hdev, HCI_OP_LE_CLEAR_ADV_SETS))
1470 return rp->status;
1471
1472 hci_dev_lock(hdev);
1473
1474 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1475 u8 instance = adv->instance;
1476
1477 err = hci_remove_adv_instance(hdev, instance);
1478 if (!err)
1479 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd),
1480 hdev, instance);
1481 }
1482
1483 hci_dev_unlock(hdev);
1484
1485 return rp->status;
1486 }
1487
hci_cc_le_read_transmit_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1488 static u8 hci_cc_le_read_transmit_power(struct hci_dev *hdev, void *data,
1489 struct sk_buff *skb)
1490 {
1491 struct hci_rp_le_read_transmit_power *rp = data;
1492
1493 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1494
1495 if (rp->status)
1496 return rp->status;
1497
1498 hdev->min_le_tx_power = rp->min_le_tx_power;
1499 hdev->max_le_tx_power = rp->max_le_tx_power;
1500
1501 return rp->status;
1502 }
1503
hci_cc_le_set_privacy_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)1504 static u8 hci_cc_le_set_privacy_mode(struct hci_dev *hdev, void *data,
1505 struct sk_buff *skb)
1506 {
1507 struct hci_ev_status *rp = data;
1508 struct hci_cp_le_set_privacy_mode *cp;
1509 struct hci_conn_params *params;
1510
1511 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1512
1513 if (rp->status)
1514 return rp->status;
1515
1516 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PRIVACY_MODE);
1517 if (!cp)
1518 return rp->status;
1519
1520 hci_dev_lock(hdev);
1521
1522 params = hci_conn_params_lookup(hdev, &cp->bdaddr, cp->bdaddr_type);
1523 if (params)
1524 WRITE_ONCE(params->privacy_mode, cp->mode);
1525
1526 hci_dev_unlock(hdev);
1527
1528 return rp->status;
1529 }
1530
hci_cc_le_set_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1531 static u8 hci_cc_le_set_adv_enable(struct hci_dev *hdev, void *data,
1532 struct sk_buff *skb)
1533 {
1534 struct hci_ev_status *rp = data;
1535 __u8 *sent;
1536
1537 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1538
1539 if (rp->status)
1540 return rp->status;
1541
1542 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE);
1543 if (!sent)
1544 return rp->status;
1545
1546 hci_dev_lock(hdev);
1547
1548 /* If we're doing connection initiation as peripheral. Set a
1549 * timeout in case something goes wrong.
1550 */
1551 if (*sent) {
1552 struct hci_conn *conn;
1553
1554 hci_dev_set_flag(hdev, HCI_LE_ADV);
1555
1556 conn = hci_lookup_le_connect(hdev);
1557 if (conn)
1558 queue_delayed_work(hdev->workqueue,
1559 &conn->le_conn_timeout,
1560 conn->conn_timeout);
1561 } else {
1562 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1563 }
1564
1565 hci_dev_unlock(hdev);
1566
1567 return rp->status;
1568 }
1569
hci_cc_le_set_ext_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1570 static u8 hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev, void *data,
1571 struct sk_buff *skb)
1572 {
1573 struct hci_cp_le_set_ext_adv_enable *cp;
1574 struct hci_cp_ext_adv_set *set;
1575 struct adv_info *adv = NULL, *n;
1576 struct hci_ev_status *rp = data;
1577
1578 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1579
1580 if (rp->status)
1581 return rp->status;
1582
1583 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE);
1584 if (!cp)
1585 return rp->status;
1586
1587 set = (void *)cp->data;
1588
1589 hci_dev_lock(hdev);
1590
1591 if (cp->num_of_sets)
1592 adv = hci_find_adv_instance(hdev, set->handle);
1593
1594 if (cp->enable) {
1595 struct hci_conn *conn;
1596
1597 hci_dev_set_flag(hdev, HCI_LE_ADV);
1598
1599 if (adv && !adv->periodic)
1600 adv->enabled = true;
1601
1602 conn = hci_lookup_le_connect(hdev);
1603 if (conn)
1604 queue_delayed_work(hdev->workqueue,
1605 &conn->le_conn_timeout,
1606 conn->conn_timeout);
1607 } else {
1608 if (cp->num_of_sets) {
1609 if (adv)
1610 adv->enabled = false;
1611
1612 /* If just one instance was disabled check if there are
1613 * any other instance enabled before clearing HCI_LE_ADV
1614 */
1615 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1616 list) {
1617 if (adv->enabled)
1618 goto unlock;
1619 }
1620 } else {
1621 /* All instances shall be considered disabled */
1622 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1623 list)
1624 adv->enabled = false;
1625 }
1626
1627 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1628 }
1629
1630 unlock:
1631 hci_dev_unlock(hdev);
1632 return rp->status;
1633 }
1634
hci_cc_le_set_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1635 static u8 hci_cc_le_set_scan_param(struct hci_dev *hdev, void *data,
1636 struct sk_buff *skb)
1637 {
1638 struct hci_cp_le_set_scan_param *cp;
1639 struct hci_ev_status *rp = data;
1640
1641 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1642
1643 if (rp->status)
1644 return rp->status;
1645
1646 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM);
1647 if (!cp)
1648 return rp->status;
1649
1650 hci_dev_lock(hdev);
1651
1652 hdev->le_scan_type = cp->type;
1653
1654 hci_dev_unlock(hdev);
1655
1656 return rp->status;
1657 }
1658
hci_cc_le_set_ext_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1659 static u8 hci_cc_le_set_ext_scan_param(struct hci_dev *hdev, void *data,
1660 struct sk_buff *skb)
1661 {
1662 struct hci_cp_le_set_ext_scan_params *cp;
1663 struct hci_ev_status *rp = data;
1664 struct hci_cp_le_scan_phy_params *phy_param;
1665
1666 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1667
1668 if (rp->status)
1669 return rp->status;
1670
1671 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS);
1672 if (!cp)
1673 return rp->status;
1674
1675 phy_param = (void *)cp->data;
1676
1677 hci_dev_lock(hdev);
1678
1679 hdev->le_scan_type = phy_param->type;
1680
1681 hci_dev_unlock(hdev);
1682
1683 return rp->status;
1684 }
1685
has_pending_adv_report(struct hci_dev * hdev)1686 static bool has_pending_adv_report(struct hci_dev *hdev)
1687 {
1688 struct discovery_state *d = &hdev->discovery;
1689
1690 return bacmp(&d->last_adv_addr, BDADDR_ANY);
1691 }
1692
clear_pending_adv_report(struct hci_dev * hdev)1693 static void clear_pending_adv_report(struct hci_dev *hdev)
1694 {
1695 struct discovery_state *d = &hdev->discovery;
1696
1697 bacpy(&d->last_adv_addr, BDADDR_ANY);
1698 d->last_adv_data_len = 0;
1699 }
1700
store_pending_adv_report(struct hci_dev * hdev,bdaddr_t * bdaddr,u8 bdaddr_type,s8 rssi,u32 flags,u8 * data,u8 len)1701 static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr,
1702 u8 bdaddr_type, s8 rssi, u32 flags,
1703 u8 *data, u8 len)
1704 {
1705 struct discovery_state *d = &hdev->discovery;
1706
1707 if (len > max_adv_len(hdev))
1708 return;
1709
1710 bacpy(&d->last_adv_addr, bdaddr);
1711 d->last_adv_addr_type = bdaddr_type;
1712 d->last_adv_rssi = rssi;
1713 d->last_adv_flags = flags;
1714 memcpy(d->last_adv_data, data, len);
1715 d->last_adv_data_len = len;
1716 }
1717
le_set_scan_enable_complete(struct hci_dev * hdev,u8 enable)1718 static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable)
1719 {
1720 hci_dev_lock(hdev);
1721
1722 switch (enable) {
1723 case LE_SCAN_ENABLE:
1724 hci_dev_set_flag(hdev, HCI_LE_SCAN);
1725 if (hdev->le_scan_type == LE_SCAN_ACTIVE)
1726 clear_pending_adv_report(hdev);
1727 if (hci_dev_test_flag(hdev, HCI_MESH))
1728 hci_discovery_set_state(hdev, DISCOVERY_FINDING);
1729 break;
1730
1731 case LE_SCAN_DISABLE:
1732 /* We do this here instead of when setting DISCOVERY_STOPPED
1733 * since the latter would potentially require waiting for
1734 * inquiry to stop too.
1735 */
1736 if (has_pending_adv_report(hdev)) {
1737 struct discovery_state *d = &hdev->discovery;
1738
1739 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
1740 d->last_adv_addr_type, NULL,
1741 d->last_adv_rssi, d->last_adv_flags,
1742 d->last_adv_data,
1743 d->last_adv_data_len, NULL, 0, 0);
1744 }
1745
1746 /* Cancel this timer so that we don't try to disable scanning
1747 * when it's already disabled.
1748 */
1749 cancel_delayed_work(&hdev->le_scan_disable);
1750
1751 hci_dev_clear_flag(hdev, HCI_LE_SCAN);
1752
1753 /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we
1754 * interrupted scanning due to a connect request. Mark
1755 * therefore discovery as stopped.
1756 */
1757 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED))
1758 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1759 else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) &&
1760 hdev->discovery.state == DISCOVERY_FINDING)
1761 queue_work(hdev->workqueue, &hdev->reenable_adv_work);
1762
1763 break;
1764
1765 default:
1766 bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d",
1767 enable);
1768 break;
1769 }
1770
1771 hci_dev_unlock(hdev);
1772 }
1773
hci_cc_le_set_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1774 static u8 hci_cc_le_set_scan_enable(struct hci_dev *hdev, void *data,
1775 struct sk_buff *skb)
1776 {
1777 struct hci_cp_le_set_scan_enable *cp;
1778 struct hci_ev_status *rp = data;
1779
1780 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1781
1782 if (rp->status)
1783 return rp->status;
1784
1785 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
1786 if (!cp)
1787 return rp->status;
1788
1789 le_set_scan_enable_complete(hdev, cp->enable);
1790
1791 return rp->status;
1792 }
1793
hci_cc_le_set_ext_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1794 static u8 hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev, void *data,
1795 struct sk_buff *skb)
1796 {
1797 struct hci_cp_le_set_ext_scan_enable *cp;
1798 struct hci_ev_status *rp = data;
1799
1800 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1801
1802 if (rp->status)
1803 return rp->status;
1804
1805 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE);
1806 if (!cp)
1807 return rp->status;
1808
1809 le_set_scan_enable_complete(hdev, cp->enable);
1810
1811 return rp->status;
1812 }
1813
hci_cc_le_read_num_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1814 static u8 hci_cc_le_read_num_adv_sets(struct hci_dev *hdev, void *data,
1815 struct sk_buff *skb)
1816 {
1817 struct hci_rp_le_read_num_supported_adv_sets *rp = data;
1818
1819 bt_dev_dbg(hdev, "status 0x%2.2x No of Adv sets %u", rp->status,
1820 rp->num_of_sets);
1821
1822 if (rp->status)
1823 return rp->status;
1824
1825 hdev->le_num_of_adv_sets = rp->num_of_sets;
1826
1827 return rp->status;
1828 }
1829
hci_cc_le_read_accept_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1830 static u8 hci_cc_le_read_accept_list_size(struct hci_dev *hdev, void *data,
1831 struct sk_buff *skb)
1832 {
1833 struct hci_rp_le_read_accept_list_size *rp = data;
1834
1835 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
1836
1837 if (rp->status)
1838 return rp->status;
1839
1840 hdev->le_accept_list_size = rp->size;
1841
1842 return rp->status;
1843 }
1844
hci_cc_le_clear_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1845 static u8 hci_cc_le_clear_accept_list(struct hci_dev *hdev, void *data,
1846 struct sk_buff *skb)
1847 {
1848 struct hci_ev_status *rp = data;
1849
1850 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1851
1852 if (rp->status)
1853 return rp->status;
1854
1855 hci_dev_lock(hdev);
1856 hci_bdaddr_list_clear(&hdev->le_accept_list);
1857 hci_dev_unlock(hdev);
1858
1859 return rp->status;
1860 }
1861
hci_cc_le_add_to_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1862 static u8 hci_cc_le_add_to_accept_list(struct hci_dev *hdev, void *data,
1863 struct sk_buff *skb)
1864 {
1865 struct hci_cp_le_add_to_accept_list *sent;
1866 struct hci_ev_status *rp = data;
1867
1868 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1869
1870 if (rp->status)
1871 return rp->status;
1872
1873 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
1874 if (!sent)
1875 return rp->status;
1876
1877 hci_dev_lock(hdev);
1878 hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr,
1879 sent->bdaddr_type);
1880 hci_dev_unlock(hdev);
1881
1882 return rp->status;
1883 }
1884
hci_cc_le_del_from_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1885 static u8 hci_cc_le_del_from_accept_list(struct hci_dev *hdev, void *data,
1886 struct sk_buff *skb)
1887 {
1888 struct hci_cp_le_del_from_accept_list *sent;
1889 struct hci_ev_status *rp = data;
1890
1891 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1892
1893 if (rp->status)
1894 return rp->status;
1895
1896 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST);
1897 if (!sent)
1898 return rp->status;
1899
1900 hci_dev_lock(hdev);
1901 hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr,
1902 sent->bdaddr_type);
1903 hci_dev_unlock(hdev);
1904
1905 return rp->status;
1906 }
1907
hci_cc_le_read_supported_states(struct hci_dev * hdev,void * data,struct sk_buff * skb)1908 static u8 hci_cc_le_read_supported_states(struct hci_dev *hdev, void *data,
1909 struct sk_buff *skb)
1910 {
1911 struct hci_rp_le_read_supported_states *rp = data;
1912
1913 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1914
1915 if (rp->status)
1916 return rp->status;
1917
1918 memcpy(hdev->le_states, rp->le_states, 8);
1919
1920 return rp->status;
1921 }
1922
hci_cc_le_read_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1923 static u8 hci_cc_le_read_def_data_len(struct hci_dev *hdev, void *data,
1924 struct sk_buff *skb)
1925 {
1926 struct hci_rp_le_read_def_data_len *rp = data;
1927
1928 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1929
1930 if (rp->status)
1931 return rp->status;
1932
1933 hdev->le_def_tx_len = le16_to_cpu(rp->tx_len);
1934 hdev->le_def_tx_time = le16_to_cpu(rp->tx_time);
1935
1936 return rp->status;
1937 }
1938
hci_cc_le_write_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1939 static u8 hci_cc_le_write_def_data_len(struct hci_dev *hdev, void *data,
1940 struct sk_buff *skb)
1941 {
1942 struct hci_cp_le_write_def_data_len *sent;
1943 struct hci_ev_status *rp = data;
1944
1945 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1946
1947 if (rp->status)
1948 return rp->status;
1949
1950 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN);
1951 if (!sent)
1952 return rp->status;
1953
1954 hdev->le_def_tx_len = le16_to_cpu(sent->tx_len);
1955 hdev->le_def_tx_time = le16_to_cpu(sent->tx_time);
1956
1957 return rp->status;
1958 }
1959
hci_cc_le_add_to_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1960 static u8 hci_cc_le_add_to_resolv_list(struct hci_dev *hdev, void *data,
1961 struct sk_buff *skb)
1962 {
1963 struct hci_cp_le_add_to_resolv_list *sent;
1964 struct hci_ev_status *rp = data;
1965
1966 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1967
1968 if (rp->status)
1969 return rp->status;
1970
1971 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST);
1972 if (!sent)
1973 return rp->status;
1974
1975 hci_dev_lock(hdev);
1976 hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
1977 sent->bdaddr_type, sent->peer_irk,
1978 sent->local_irk);
1979 hci_dev_unlock(hdev);
1980
1981 return rp->status;
1982 }
1983
hci_cc_le_del_from_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1984 static u8 hci_cc_le_del_from_resolv_list(struct hci_dev *hdev, void *data,
1985 struct sk_buff *skb)
1986 {
1987 struct hci_cp_le_del_from_resolv_list *sent;
1988 struct hci_ev_status *rp = data;
1989
1990 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1991
1992 if (rp->status)
1993 return rp->status;
1994
1995 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST);
1996 if (!sent)
1997 return rp->status;
1998
1999 hci_dev_lock(hdev);
2000 hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
2001 sent->bdaddr_type);
2002 hci_dev_unlock(hdev);
2003
2004 return rp->status;
2005 }
2006
hci_cc_le_clear_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)2007 static u8 hci_cc_le_clear_resolv_list(struct hci_dev *hdev, void *data,
2008 struct sk_buff *skb)
2009 {
2010 struct hci_ev_status *rp = data;
2011
2012 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2013
2014 if (rp->status)
2015 return rp->status;
2016
2017 hci_dev_lock(hdev);
2018 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2019 hci_dev_unlock(hdev);
2020
2021 return rp->status;
2022 }
2023
hci_cc_le_read_resolv_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)2024 static u8 hci_cc_le_read_resolv_list_size(struct hci_dev *hdev, void *data,
2025 struct sk_buff *skb)
2026 {
2027 struct hci_rp_le_read_resolv_list_size *rp = data;
2028
2029 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
2030
2031 if (rp->status)
2032 return rp->status;
2033
2034 hdev->le_resolv_list_size = rp->size;
2035
2036 return rp->status;
2037 }
2038
hci_cc_le_set_addr_resolution_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)2039 static u8 hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev, void *data,
2040 struct sk_buff *skb)
2041 {
2042 struct hci_ev_status *rp = data;
2043 __u8 *sent;
2044
2045 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2046
2047 if (rp->status)
2048 return rp->status;
2049
2050 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE);
2051 if (!sent)
2052 return rp->status;
2053
2054 hci_dev_lock(hdev);
2055
2056 if (*sent)
2057 hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION);
2058 else
2059 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);
2060
2061 hci_dev_unlock(hdev);
2062
2063 return rp->status;
2064 }
2065
hci_cc_le_read_max_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)2066 static u8 hci_cc_le_read_max_data_len(struct hci_dev *hdev, void *data,
2067 struct sk_buff *skb)
2068 {
2069 struct hci_rp_le_read_max_data_len *rp = data;
2070
2071 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2072
2073 if (rp->status)
2074 return rp->status;
2075
2076 hdev->le_max_tx_len = le16_to_cpu(rp->tx_len);
2077 hdev->le_max_tx_time = le16_to_cpu(rp->tx_time);
2078 hdev->le_max_rx_len = le16_to_cpu(rp->rx_len);
2079 hdev->le_max_rx_time = le16_to_cpu(rp->rx_time);
2080
2081 return rp->status;
2082 }
2083
hci_cc_write_le_host_supported(struct hci_dev * hdev,void * data,struct sk_buff * skb)2084 static u8 hci_cc_write_le_host_supported(struct hci_dev *hdev, void *data,
2085 struct sk_buff *skb)
2086 {
2087 struct hci_cp_write_le_host_supported *sent;
2088 struct hci_ev_status *rp = data;
2089
2090 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2091
2092 if (rp->status)
2093 return rp->status;
2094
2095 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED);
2096 if (!sent)
2097 return rp->status;
2098
2099 hci_dev_lock(hdev);
2100
2101 if (sent->le) {
2102 hdev->features[1][0] |= LMP_HOST_LE;
2103 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
2104 } else {
2105 hdev->features[1][0] &= ~LMP_HOST_LE;
2106 hci_dev_clear_flag(hdev, HCI_LE_ENABLED);
2107 hci_dev_clear_flag(hdev, HCI_ADVERTISING);
2108 }
2109
2110 if (sent->simul)
2111 hdev->features[1][0] |= LMP_HOST_LE_BREDR;
2112 else
2113 hdev->features[1][0] &= ~LMP_HOST_LE_BREDR;
2114
2115 hci_dev_unlock(hdev);
2116
2117 return rp->status;
2118 }
2119
hci_cc_set_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2120 static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data,
2121 struct sk_buff *skb)
2122 {
2123 struct hci_cp_le_set_adv_param *cp;
2124 struct hci_ev_status *rp = data;
2125
2126 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2127
2128 if (rp->status)
2129 return rp->status;
2130
2131 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM);
2132 if (!cp)
2133 return rp->status;
2134
2135 hci_dev_lock(hdev);
2136 hdev->adv_addr_type = cp->own_address_type;
2137 hci_dev_unlock(hdev);
2138
2139 return rp->status;
2140 }
2141
hci_cc_set_ext_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2142 static u8 hci_cc_set_ext_adv_param(struct hci_dev *hdev, void *data,
2143 struct sk_buff *skb)
2144 {
2145 struct hci_rp_le_set_ext_adv_params *rp = data;
2146 struct hci_cp_le_set_ext_adv_params *cp;
2147 struct adv_info *adv_instance;
2148
2149 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2150
2151 if (rp->status)
2152 return rp->status;
2153
2154 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS);
2155 if (!cp)
2156 return rp->status;
2157
2158 hci_dev_lock(hdev);
2159 hdev->adv_addr_type = cp->own_addr_type;
2160 if (!cp->handle) {
2161 /* Store in hdev for instance 0 */
2162 hdev->adv_tx_power = rp->tx_power;
2163 } else {
2164 adv_instance = hci_find_adv_instance(hdev, cp->handle);
2165 if (adv_instance)
2166 adv_instance->tx_power = rp->tx_power;
2167 }
2168 /* Update adv data as tx power is known now */
2169 hci_update_adv_data(hdev, cp->handle);
2170
2171 hci_dev_unlock(hdev);
2172
2173 return rp->status;
2174 }
2175
hci_cc_read_rssi(struct hci_dev * hdev,void * data,struct sk_buff * skb)2176 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data,
2177 struct sk_buff *skb)
2178 {
2179 struct hci_rp_read_rssi *rp = data;
2180 struct hci_conn *conn;
2181
2182 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2183
2184 if (rp->status)
2185 return rp->status;
2186
2187 hci_dev_lock(hdev);
2188
2189 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2190 if (conn)
2191 conn->rssi = rp->rssi;
2192
2193 hci_dev_unlock(hdev);
2194
2195 return rp->status;
2196 }
2197
hci_cc_read_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)2198 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data,
2199 struct sk_buff *skb)
2200 {
2201 struct hci_cp_read_tx_power *sent;
2202 struct hci_rp_read_tx_power *rp = data;
2203 struct hci_conn *conn;
2204
2205 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2206
2207 if (rp->status)
2208 return rp->status;
2209
2210 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
2211 if (!sent)
2212 return rp->status;
2213
2214 hci_dev_lock(hdev);
2215
2216 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2217 if (!conn)
2218 goto unlock;
2219
2220 switch (sent->type) {
2221 case 0x00:
2222 conn->tx_power = rp->tx_power;
2223 break;
2224 case 0x01:
2225 conn->max_tx_power = rp->tx_power;
2226 break;
2227 }
2228
2229 unlock:
2230 hci_dev_unlock(hdev);
2231 return rp->status;
2232 }
2233
hci_cc_write_ssp_debug_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)2234 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data,
2235 struct sk_buff *skb)
2236 {
2237 struct hci_ev_status *rp = data;
2238 u8 *mode;
2239
2240 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2241
2242 if (rp->status)
2243 return rp->status;
2244
2245 mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
2246 if (mode)
2247 hdev->ssp_debug_mode = *mode;
2248
2249 return rp->status;
2250 }
2251
hci_cs_inquiry(struct hci_dev * hdev,__u8 status)2252 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
2253 {
2254 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2255
2256 if (status)
2257 return;
2258
2259 if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
2260 set_bit(HCI_INQUIRY, &hdev->flags);
2261 }
2262
hci_cs_create_conn(struct hci_dev * hdev,__u8 status)2263 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
2264 {
2265 struct hci_cp_create_conn *cp;
2266 struct hci_conn *conn;
2267
2268 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2269
2270 cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
2271 if (!cp)
2272 return;
2273
2274 hci_dev_lock(hdev);
2275
2276 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2277
2278 bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn);
2279
2280 if (status) {
2281 if (conn && conn->state == BT_CONNECT) {
2282 conn->state = BT_CLOSED;
2283 hci_connect_cfm(conn, status);
2284 hci_conn_del(conn);
2285 }
2286 } else {
2287 if (!conn) {
2288 conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
2289 HCI_ROLE_MASTER);
2290 if (IS_ERR(conn))
2291 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
2292 }
2293 }
2294
2295 hci_dev_unlock(hdev);
2296 }
2297
hci_cs_add_sco(struct hci_dev * hdev,__u8 status)2298 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
2299 {
2300 struct hci_cp_add_sco *cp;
2301 struct hci_conn *acl;
2302 struct hci_link *link;
2303 __u16 handle;
2304
2305 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2306
2307 if (!status)
2308 return;
2309
2310 cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
2311 if (!cp)
2312 return;
2313
2314 handle = __le16_to_cpu(cp->handle);
2315
2316 bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
2317
2318 hci_dev_lock(hdev);
2319
2320 acl = hci_conn_hash_lookup_handle(hdev, handle);
2321 if (acl) {
2322 link = list_first_entry_or_null(&acl->link_list,
2323 struct hci_link, list);
2324 if (link && link->conn) {
2325 link->conn->state = BT_CLOSED;
2326
2327 hci_connect_cfm(link->conn, status);
2328 hci_conn_del(link->conn);
2329 }
2330 }
2331
2332 hci_dev_unlock(hdev);
2333 }
2334
hci_cs_auth_requested(struct hci_dev * hdev,__u8 status)2335 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
2336 {
2337 struct hci_cp_auth_requested *cp;
2338 struct hci_conn *conn;
2339
2340 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2341
2342 if (!status)
2343 return;
2344
2345 cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
2346 if (!cp)
2347 return;
2348
2349 hci_dev_lock(hdev);
2350
2351 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2352 if (conn) {
2353 if (conn->state == BT_CONFIG) {
2354 hci_connect_cfm(conn, status);
2355 hci_conn_drop(conn);
2356 }
2357 }
2358
2359 hci_dev_unlock(hdev);
2360 }
2361
hci_cs_set_conn_encrypt(struct hci_dev * hdev,__u8 status)2362 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
2363 {
2364 struct hci_cp_set_conn_encrypt *cp;
2365 struct hci_conn *conn;
2366
2367 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2368
2369 if (!status)
2370 return;
2371
2372 cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
2373 if (!cp)
2374 return;
2375
2376 hci_dev_lock(hdev);
2377
2378 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2379 if (conn) {
2380 if (conn->state == BT_CONFIG) {
2381 hci_connect_cfm(conn, status);
2382 hci_conn_drop(conn);
2383 }
2384 }
2385
2386 hci_dev_unlock(hdev);
2387 }
2388
hci_outgoing_auth_needed(struct hci_dev * hdev,struct hci_conn * conn)2389 static int hci_outgoing_auth_needed(struct hci_dev *hdev,
2390 struct hci_conn *conn)
2391 {
2392 if (conn->state != BT_CONFIG || !conn->out)
2393 return 0;
2394
2395 if (conn->pending_sec_level == BT_SECURITY_SDP)
2396 return 0;
2397
2398 /* Only request authentication for SSP connections or non-SSP
2399 * devices with sec_level MEDIUM or HIGH or if MITM protection
2400 * is requested.
2401 */
2402 if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
2403 conn->pending_sec_level != BT_SECURITY_FIPS &&
2404 conn->pending_sec_level != BT_SECURITY_HIGH &&
2405 conn->pending_sec_level != BT_SECURITY_MEDIUM)
2406 return 0;
2407
2408 return 1;
2409 }
2410
hci_resolve_name(struct hci_dev * hdev,struct inquiry_entry * e)2411 static int hci_resolve_name(struct hci_dev *hdev,
2412 struct inquiry_entry *e)
2413 {
2414 struct hci_cp_remote_name_req cp;
2415
2416 memset(&cp, 0, sizeof(cp));
2417
2418 bacpy(&cp.bdaddr, &e->data.bdaddr);
2419 cp.pscan_rep_mode = e->data.pscan_rep_mode;
2420 cp.pscan_mode = e->data.pscan_mode;
2421 cp.clock_offset = e->data.clock_offset;
2422
2423 return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
2424 }
2425
hci_resolve_next_name(struct hci_dev * hdev)2426 static bool hci_resolve_next_name(struct hci_dev *hdev)
2427 {
2428 struct discovery_state *discov = &hdev->discovery;
2429 struct inquiry_entry *e;
2430
2431 if (list_empty(&discov->resolve))
2432 return false;
2433
2434 /* We should stop if we already spent too much time resolving names. */
2435 if (time_after(jiffies, discov->name_resolve_timeout)) {
2436 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long.");
2437 return false;
2438 }
2439
2440 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2441 if (!e)
2442 return false;
2443
2444 if (hci_resolve_name(hdev, e) == 0) {
2445 e->name_state = NAME_PENDING;
2446 return true;
2447 }
2448
2449 return false;
2450 }
2451
hci_check_pending_name(struct hci_dev * hdev,struct hci_conn * conn,bdaddr_t * bdaddr,u8 * name,u8 name_len)2452 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
2453 bdaddr_t *bdaddr, u8 *name, u8 name_len)
2454 {
2455 struct discovery_state *discov = &hdev->discovery;
2456 struct inquiry_entry *e;
2457
2458 /* Update the mgmt connected state if necessary. Be careful with
2459 * conn objects that exist but are not (yet) connected however.
2460 * Only those in BT_CONFIG or BT_CONNECTED states can be
2461 * considered connected.
2462 */
2463 if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED))
2464 mgmt_device_connected(hdev, conn, name, name_len);
2465
2466 if (discov->state == DISCOVERY_STOPPED)
2467 return;
2468
2469 if (discov->state == DISCOVERY_STOPPING)
2470 goto discov_complete;
2471
2472 if (discov->state != DISCOVERY_RESOLVING)
2473 return;
2474
2475 e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
2476 /* If the device was not found in a list of found devices names of which
2477 * are pending. there is no need to continue resolving a next name as it
2478 * will be done upon receiving another Remote Name Request Complete
2479 * Event */
2480 if (!e)
2481 return;
2482
2483 list_del(&e->list);
2484
2485 e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN;
2486 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi,
2487 name, name_len);
2488
2489 if (hci_resolve_next_name(hdev))
2490 return;
2491
2492 discov_complete:
2493 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2494 }
2495
hci_cs_remote_name_req(struct hci_dev * hdev,__u8 status)2496 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
2497 {
2498 struct hci_cp_remote_name_req *cp;
2499 struct hci_conn *conn;
2500
2501 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2502
2503 /* If successful wait for the name req complete event before
2504 * checking for the need to do authentication */
2505 if (!status)
2506 return;
2507
2508 cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
2509 if (!cp)
2510 return;
2511
2512 hci_dev_lock(hdev);
2513
2514 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2515
2516 if (hci_dev_test_flag(hdev, HCI_MGMT))
2517 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
2518
2519 if (!conn)
2520 goto unlock;
2521
2522 if (!hci_outgoing_auth_needed(hdev, conn))
2523 goto unlock;
2524
2525 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2526 struct hci_cp_auth_requested auth_cp;
2527
2528 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2529
2530 auth_cp.handle = __cpu_to_le16(conn->handle);
2531 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
2532 sizeof(auth_cp), &auth_cp);
2533 }
2534
2535 unlock:
2536 hci_dev_unlock(hdev);
2537 }
2538
hci_cs_read_remote_features(struct hci_dev * hdev,__u8 status)2539 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
2540 {
2541 struct hci_cp_read_remote_features *cp;
2542 struct hci_conn *conn;
2543
2544 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2545
2546 if (!status)
2547 return;
2548
2549 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
2550 if (!cp)
2551 return;
2552
2553 hci_dev_lock(hdev);
2554
2555 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2556 if (conn) {
2557 if (conn->state == BT_CONFIG) {
2558 hci_connect_cfm(conn, status);
2559 hci_conn_drop(conn);
2560 }
2561 }
2562
2563 hci_dev_unlock(hdev);
2564 }
2565
hci_cs_read_remote_ext_features(struct hci_dev * hdev,__u8 status)2566 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
2567 {
2568 struct hci_cp_read_remote_ext_features *cp;
2569 struct hci_conn *conn;
2570
2571 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2572
2573 if (!status)
2574 return;
2575
2576 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
2577 if (!cp)
2578 return;
2579
2580 hci_dev_lock(hdev);
2581
2582 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2583 if (conn) {
2584 if (conn->state == BT_CONFIG) {
2585 hci_connect_cfm(conn, status);
2586 hci_conn_drop(conn);
2587 }
2588 }
2589
2590 hci_dev_unlock(hdev);
2591 }
2592
hci_setup_sync_conn_status(struct hci_dev * hdev,__u16 handle,__u8 status)2593 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle,
2594 __u8 status)
2595 {
2596 struct hci_conn *acl;
2597 struct hci_link *link;
2598
2599 bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status);
2600
2601 hci_dev_lock(hdev);
2602
2603 acl = hci_conn_hash_lookup_handle(hdev, handle);
2604 if (acl) {
2605 link = list_first_entry_or_null(&acl->link_list,
2606 struct hci_link, list);
2607 if (link && link->conn) {
2608 link->conn->state = BT_CLOSED;
2609
2610 hci_connect_cfm(link->conn, status);
2611 hci_conn_del(link->conn);
2612 }
2613 }
2614
2615 hci_dev_unlock(hdev);
2616 }
2617
hci_cs_setup_sync_conn(struct hci_dev * hdev,__u8 status)2618 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2619 {
2620 struct hci_cp_setup_sync_conn *cp;
2621
2622 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2623
2624 if (!status)
2625 return;
2626
2627 cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
2628 if (!cp)
2629 return;
2630
2631 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2632 }
2633
hci_cs_enhanced_setup_sync_conn(struct hci_dev * hdev,__u8 status)2634 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2635 {
2636 struct hci_cp_enhanced_setup_sync_conn *cp;
2637
2638 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2639
2640 if (!status)
2641 return;
2642
2643 cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN);
2644 if (!cp)
2645 return;
2646
2647 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2648 }
2649
hci_cs_sniff_mode(struct hci_dev * hdev,__u8 status)2650 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
2651 {
2652 struct hci_cp_sniff_mode *cp;
2653 struct hci_conn *conn;
2654
2655 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2656
2657 if (!status)
2658 return;
2659
2660 cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
2661 if (!cp)
2662 return;
2663
2664 hci_dev_lock(hdev);
2665
2666 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2667 if (conn) {
2668 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2669
2670 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2671 hci_sco_setup(conn, status);
2672 }
2673
2674 hci_dev_unlock(hdev);
2675 }
2676
hci_cs_exit_sniff_mode(struct hci_dev * hdev,__u8 status)2677 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
2678 {
2679 struct hci_cp_exit_sniff_mode *cp;
2680 struct hci_conn *conn;
2681
2682 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2683
2684 if (!status)
2685 return;
2686
2687 cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
2688 if (!cp)
2689 return;
2690
2691 hci_dev_lock(hdev);
2692
2693 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2694 if (conn) {
2695 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2696
2697 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2698 hci_sco_setup(conn, status);
2699 }
2700
2701 hci_dev_unlock(hdev);
2702 }
2703
hci_cs_disconnect(struct hci_dev * hdev,u8 status)2704 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
2705 {
2706 struct hci_cp_disconnect *cp;
2707 struct hci_conn_params *params;
2708 struct hci_conn *conn;
2709 bool mgmt_conn;
2710
2711 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2712
2713 /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
2714 * otherwise cleanup the connection immediately.
2715 */
2716 if (!status && !hdev->suspended)
2717 return;
2718
2719 cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
2720 if (!cp)
2721 return;
2722
2723 hci_dev_lock(hdev);
2724
2725 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2726 if (!conn)
2727 goto unlock;
2728
2729 if (status) {
2730 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2731 conn->dst_type, status);
2732
2733 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
2734 hdev->cur_adv_instance = conn->adv_instance;
2735 hci_enable_advertising(hdev);
2736 }
2737
2738 /* Inform sockets conn is gone before we delete it */
2739 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED);
2740
2741 goto done;
2742 }
2743
2744 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
2745
2746 if (conn->type == ACL_LINK) {
2747 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
2748 hci_remove_link_key(hdev, &conn->dst);
2749 }
2750
2751 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
2752 if (params) {
2753 switch (params->auto_connect) {
2754 case HCI_AUTO_CONN_LINK_LOSS:
2755 if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT)
2756 break;
2757 fallthrough;
2758
2759 case HCI_AUTO_CONN_DIRECT:
2760 case HCI_AUTO_CONN_ALWAYS:
2761 hci_pend_le_list_del_init(params);
2762 hci_pend_le_list_add(params, &hdev->pend_le_conns);
2763 break;
2764
2765 default:
2766 break;
2767 }
2768 }
2769
2770 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
2771 cp->reason, mgmt_conn);
2772
2773 hci_disconn_cfm(conn, cp->reason);
2774
2775 done:
2776 /* If the disconnection failed for any reason, the upper layer
2777 * does not retry to disconnect in current implementation.
2778 * Hence, we need to do some basic cleanup here and re-enable
2779 * advertising if necessary.
2780 */
2781 hci_conn_del(conn);
2782 unlock:
2783 hci_dev_unlock(hdev);
2784 }
2785
ev_bdaddr_type(struct hci_dev * hdev,u8 type,bool * resolved)2786 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved)
2787 {
2788 /* When using controller based address resolution, then the new
2789 * address types 0x02 and 0x03 are used. These types need to be
2790 * converted back into either public address or random address type
2791 */
2792 switch (type) {
2793 case ADDR_LE_DEV_PUBLIC_RESOLVED:
2794 if (resolved)
2795 *resolved = true;
2796 return ADDR_LE_DEV_PUBLIC;
2797 case ADDR_LE_DEV_RANDOM_RESOLVED:
2798 if (resolved)
2799 *resolved = true;
2800 return ADDR_LE_DEV_RANDOM;
2801 }
2802
2803 if (resolved)
2804 *resolved = false;
2805 return type;
2806 }
2807
cs_le_create_conn(struct hci_dev * hdev,bdaddr_t * peer_addr,u8 peer_addr_type,u8 own_address_type,u8 filter_policy)2808 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
2809 u8 peer_addr_type, u8 own_address_type,
2810 u8 filter_policy)
2811 {
2812 struct hci_conn *conn;
2813
2814 conn = hci_conn_hash_lookup_le(hdev, peer_addr,
2815 peer_addr_type);
2816 if (!conn)
2817 return;
2818
2819 own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL);
2820
2821 /* Store the initiator and responder address information which
2822 * is needed for SMP. These values will not change during the
2823 * lifetime of the connection.
2824 */
2825 conn->init_addr_type = own_address_type;
2826 if (own_address_type == ADDR_LE_DEV_RANDOM)
2827 bacpy(&conn->init_addr, &hdev->random_addr);
2828 else
2829 bacpy(&conn->init_addr, &hdev->bdaddr);
2830
2831 conn->resp_addr_type = peer_addr_type;
2832 bacpy(&conn->resp_addr, peer_addr);
2833 }
2834
hci_cs_le_create_conn(struct hci_dev * hdev,u8 status)2835 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
2836 {
2837 struct hci_cp_le_create_conn *cp;
2838
2839 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2840
2841 /* All connection failure handling is taken care of by the
2842 * hci_conn_failed function which is triggered by the HCI
2843 * request completion callbacks used for connecting.
2844 */
2845 if (status)
2846 return;
2847
2848 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
2849 if (!cp)
2850 return;
2851
2852 hci_dev_lock(hdev);
2853
2854 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2855 cp->own_address_type, cp->filter_policy);
2856
2857 hci_dev_unlock(hdev);
2858 }
2859
hci_cs_le_ext_create_conn(struct hci_dev * hdev,u8 status)2860 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
2861 {
2862 struct hci_cp_le_ext_create_conn *cp;
2863
2864 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2865
2866 /* All connection failure handling is taken care of by the
2867 * hci_conn_failed function which is triggered by the HCI
2868 * request completion callbacks used for connecting.
2869 */
2870 if (status)
2871 return;
2872
2873 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
2874 if (!cp)
2875 return;
2876
2877 hci_dev_lock(hdev);
2878
2879 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2880 cp->own_addr_type, cp->filter_policy);
2881
2882 hci_dev_unlock(hdev);
2883 }
2884
hci_cs_le_read_remote_features(struct hci_dev * hdev,u8 status)2885 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
2886 {
2887 struct hci_cp_le_read_remote_features *cp;
2888 struct hci_conn *conn;
2889
2890 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2891
2892 if (!status)
2893 return;
2894
2895 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
2896 if (!cp)
2897 return;
2898
2899 hci_dev_lock(hdev);
2900
2901 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2902 if (conn) {
2903 if (conn->state == BT_CONFIG) {
2904 hci_connect_cfm(conn, status);
2905 hci_conn_drop(conn);
2906 }
2907 }
2908
2909 hci_dev_unlock(hdev);
2910 }
2911
hci_cs_le_start_enc(struct hci_dev * hdev,u8 status)2912 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
2913 {
2914 struct hci_cp_le_start_enc *cp;
2915 struct hci_conn *conn;
2916
2917 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2918
2919 if (!status)
2920 return;
2921
2922 hci_dev_lock(hdev);
2923
2924 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
2925 if (!cp)
2926 goto unlock;
2927
2928 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2929 if (!conn)
2930 goto unlock;
2931
2932 if (conn->state != BT_CONNECTED)
2933 goto unlock;
2934
2935 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
2936 hci_conn_drop(conn);
2937
2938 unlock:
2939 hci_dev_unlock(hdev);
2940 }
2941
hci_cs_switch_role(struct hci_dev * hdev,u8 status)2942 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
2943 {
2944 struct hci_cp_switch_role *cp;
2945 struct hci_conn *conn;
2946
2947 BT_DBG("%s status 0x%2.2x", hdev->name, status);
2948
2949 if (!status)
2950 return;
2951
2952 cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
2953 if (!cp)
2954 return;
2955
2956 hci_dev_lock(hdev);
2957
2958 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2959 if (conn)
2960 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
2961
2962 hci_dev_unlock(hdev);
2963 }
2964
hci_inquiry_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)2965 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data,
2966 struct sk_buff *skb)
2967 {
2968 struct hci_ev_status *ev = data;
2969 struct discovery_state *discov = &hdev->discovery;
2970 struct inquiry_entry *e;
2971
2972 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
2973
2974 if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
2975 return;
2976
2977 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
2978 wake_up_bit(&hdev->flags, HCI_INQUIRY);
2979
2980 if (!hci_dev_test_flag(hdev, HCI_MGMT))
2981 return;
2982
2983 hci_dev_lock(hdev);
2984
2985 if (discov->state != DISCOVERY_FINDING)
2986 goto unlock;
2987
2988 if (list_empty(&discov->resolve)) {
2989 /* When BR/EDR inquiry is active and no LE scanning is in
2990 * progress, then change discovery state to indicate completion.
2991 *
2992 * When running LE scanning and BR/EDR inquiry simultaneously
2993 * and the LE scan already finished, then change the discovery
2994 * state to indicate completion.
2995 */
2996 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2997 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
2998 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2999 goto unlock;
3000 }
3001
3002 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
3003 if (e && hci_resolve_name(hdev, e) == 0) {
3004 e->name_state = NAME_PENDING;
3005 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
3006 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION;
3007 } else {
3008 /* When BR/EDR inquiry is active and no LE scanning is in
3009 * progress, then change discovery state to indicate completion.
3010 *
3011 * When running LE scanning and BR/EDR inquiry simultaneously
3012 * and the LE scan already finished, then change the discovery
3013 * state to indicate completion.
3014 */
3015 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
3016 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
3017 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3018 }
3019
3020 unlock:
3021 hci_dev_unlock(hdev);
3022 }
3023
hci_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)3024 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata,
3025 struct sk_buff *skb)
3026 {
3027 struct hci_ev_inquiry_result *ev = edata;
3028 struct inquiry_data data;
3029 int i;
3030
3031 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT,
3032 flex_array_size(ev, info, ev->num)))
3033 return;
3034
3035 bt_dev_dbg(hdev, "num %d", ev->num);
3036
3037 if (!ev->num)
3038 return;
3039
3040 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
3041 return;
3042
3043 hci_dev_lock(hdev);
3044
3045 for (i = 0; i < ev->num; i++) {
3046 struct inquiry_info *info = &ev->info[i];
3047 u32 flags;
3048
3049 bacpy(&data.bdaddr, &info->bdaddr);
3050 data.pscan_rep_mode = info->pscan_rep_mode;
3051 data.pscan_period_mode = info->pscan_period_mode;
3052 data.pscan_mode = info->pscan_mode;
3053 memcpy(data.dev_class, info->dev_class, 3);
3054 data.clock_offset = info->clock_offset;
3055 data.rssi = HCI_RSSI_INVALID;
3056 data.ssp_mode = 0x00;
3057
3058 flags = hci_inquiry_cache_update(hdev, &data, false);
3059
3060 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3061 info->dev_class, HCI_RSSI_INVALID,
3062 flags, NULL, 0, NULL, 0, 0);
3063 }
3064
3065 hci_dev_unlock(hdev);
3066 }
3067
hci_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3068 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
3069 struct sk_buff *skb)
3070 {
3071 struct hci_ev_conn_complete *ev = data;
3072 struct hci_conn *conn;
3073 u8 status = ev->status;
3074
3075 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3076
3077 hci_dev_lock(hdev);
3078
3079 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
3080 if (!conn) {
3081 /* In case of error status and there is no connection pending
3082 * just unlock as there is nothing to cleanup.
3083 */
3084 if (ev->status)
3085 goto unlock;
3086
3087 /* Connection may not exist if auto-connected. Check the bredr
3088 * allowlist to see if this device is allowed to auto connect.
3089 * If link is an ACL type, create a connection class
3090 * automatically.
3091 *
3092 * Auto-connect will only occur if the event filter is
3093 * programmed with a given address. Right now, event filter is
3094 * only used during suspend.
3095 */
3096 if (ev->link_type == ACL_LINK &&
3097 hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
3098 &ev->bdaddr,
3099 BDADDR_BREDR)) {
3100 conn = hci_conn_add_unset(hdev, ev->link_type,
3101 &ev->bdaddr, HCI_ROLE_SLAVE);
3102 if (IS_ERR(conn)) {
3103 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3104 goto unlock;
3105 }
3106 } else {
3107 if (ev->link_type != SCO_LINK)
3108 goto unlock;
3109
3110 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK,
3111 &ev->bdaddr);
3112 if (!conn)
3113 goto unlock;
3114
3115 conn->type = SCO_LINK;
3116 }
3117 }
3118
3119 /* The HCI_Connection_Complete event is only sent once per connection.
3120 * Processing it more than once per connection can corrupt kernel memory.
3121 *
3122 * As the connection handle is set here for the first time, it indicates
3123 * whether the connection is already set up.
3124 */
3125 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
3126 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
3127 goto unlock;
3128 }
3129
3130 if (!status) {
3131 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
3132 if (status)
3133 goto done;
3134
3135 if (conn->type == ACL_LINK) {
3136 conn->state = BT_CONFIG;
3137 hci_conn_hold(conn);
3138
3139 if (!conn->out && !hci_conn_ssp_enabled(conn) &&
3140 !hci_find_link_key(hdev, &ev->bdaddr))
3141 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
3142 else
3143 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3144 } else
3145 conn->state = BT_CONNECTED;
3146
3147 hci_debugfs_create_conn(conn);
3148 hci_conn_add_sysfs(conn);
3149
3150 if (test_bit(HCI_AUTH, &hdev->flags))
3151 set_bit(HCI_CONN_AUTH, &conn->flags);
3152
3153 if (test_bit(HCI_ENCRYPT, &hdev->flags))
3154 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3155
3156 /* "Link key request" completed ahead of "connect request" completes */
3157 if (ev->encr_mode == 1 && !test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3158 ev->link_type == ACL_LINK) {
3159 struct link_key *key;
3160 struct hci_cp_read_enc_key_size cp;
3161
3162 key = hci_find_link_key(hdev, &ev->bdaddr);
3163 if (key) {
3164 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3165
3166 if (!read_key_size_capable(hdev)) {
3167 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3168 } else {
3169 cp.handle = cpu_to_le16(conn->handle);
3170 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3171 sizeof(cp), &cp)) {
3172 bt_dev_err(hdev, "sending read key size failed");
3173 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3174 }
3175 }
3176
3177 hci_encrypt_cfm(conn, ev->status);
3178 }
3179 }
3180
3181 /* Get remote features */
3182 if (conn->type == ACL_LINK) {
3183 struct hci_cp_read_remote_features cp;
3184 cp.handle = ev->handle;
3185 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
3186 sizeof(cp), &cp);
3187
3188 hci_update_scan(hdev);
3189 }
3190
3191 /* Set packet type for incoming connection */
3192 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
3193 struct hci_cp_change_conn_ptype cp;
3194 cp.handle = ev->handle;
3195 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3196 hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
3197 &cp);
3198 }
3199 }
3200
3201 if (conn->type == ACL_LINK)
3202 hci_sco_setup(conn, ev->status);
3203
3204 done:
3205 if (status) {
3206 hci_conn_failed(conn, status);
3207 } else if (ev->link_type == SCO_LINK) {
3208 switch (conn->setting & SCO_AIRMODE_MASK) {
3209 case SCO_AIRMODE_CVSD:
3210 if (hdev->notify)
3211 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
3212 break;
3213 }
3214
3215 hci_connect_cfm(conn, status);
3216 }
3217
3218 unlock:
3219 hci_dev_unlock(hdev);
3220 }
3221
hci_reject_conn(struct hci_dev * hdev,bdaddr_t * bdaddr)3222 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
3223 {
3224 struct hci_cp_reject_conn_req cp;
3225
3226 bacpy(&cp.bdaddr, bdaddr);
3227 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
3228 hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
3229 }
3230
hci_conn_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3231 static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
3232 struct sk_buff *skb)
3233 {
3234 struct hci_ev_conn_request *ev = data;
3235 int mask = hdev->link_mode;
3236 struct inquiry_entry *ie;
3237 struct hci_conn *conn;
3238 __u8 flags = 0;
3239
3240 bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type);
3241
3242 /* Reject incoming connection from device with same BD ADDR against
3243 * CVE-2020-26555
3244 */
3245 if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
3246 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
3247 &ev->bdaddr);
3248 hci_reject_conn(hdev, &ev->bdaddr);
3249 return;
3250 }
3251
3252 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
3253 &flags);
3254
3255 if (!(mask & HCI_LM_ACCEPT)) {
3256 hci_reject_conn(hdev, &ev->bdaddr);
3257 return;
3258 }
3259
3260 hci_dev_lock(hdev);
3261
3262 if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
3263 BDADDR_BREDR)) {
3264 hci_reject_conn(hdev, &ev->bdaddr);
3265 goto unlock;
3266 }
3267
3268 /* Require HCI_CONNECTABLE or an accept list entry to accept the
3269 * connection. These features are only touched through mgmt so
3270 * only do the checks if HCI_MGMT is set.
3271 */
3272 if (hci_dev_test_flag(hdev, HCI_MGMT) &&
3273 !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
3274 !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
3275 BDADDR_BREDR)) {
3276 hci_reject_conn(hdev, &ev->bdaddr);
3277 goto unlock;
3278 }
3279
3280 /* Connection accepted */
3281
3282 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3283 if (ie)
3284 memcpy(ie->data.dev_class, ev->dev_class, 3);
3285
3286 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
3287 &ev->bdaddr);
3288 if (!conn) {
3289 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr,
3290 HCI_ROLE_SLAVE);
3291 if (IS_ERR(conn)) {
3292 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3293 goto unlock;
3294 }
3295 }
3296
3297 memcpy(conn->dev_class, ev->dev_class, 3);
3298
3299 hci_dev_unlock(hdev);
3300
3301 if (ev->link_type == ACL_LINK ||
3302 (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
3303 struct hci_cp_accept_conn_req cp;
3304 conn->state = BT_CONNECT;
3305
3306 bacpy(&cp.bdaddr, &ev->bdaddr);
3307
3308 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
3309 cp.role = 0x00; /* Become central */
3310 else
3311 cp.role = 0x01; /* Remain peripheral */
3312
3313 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
3314 } else if (!(flags & HCI_PROTO_DEFER)) {
3315 struct hci_cp_accept_sync_conn_req cp;
3316 conn->state = BT_CONNECT;
3317
3318 bacpy(&cp.bdaddr, &ev->bdaddr);
3319 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3320
3321 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
3322 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
3323 cp.max_latency = cpu_to_le16(0xffff);
3324 cp.content_format = cpu_to_le16(hdev->voice_setting);
3325 cp.retrans_effort = 0xff;
3326
3327 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
3328 &cp);
3329 } else {
3330 conn->state = BT_CONNECT2;
3331 hci_connect_cfm(conn, 0);
3332 }
3333
3334 return;
3335 unlock:
3336 hci_dev_unlock(hdev);
3337 }
3338
hci_to_mgmt_reason(u8 err)3339 static u8 hci_to_mgmt_reason(u8 err)
3340 {
3341 switch (err) {
3342 case HCI_ERROR_CONNECTION_TIMEOUT:
3343 return MGMT_DEV_DISCONN_TIMEOUT;
3344 case HCI_ERROR_REMOTE_USER_TERM:
3345 case HCI_ERROR_REMOTE_LOW_RESOURCES:
3346 case HCI_ERROR_REMOTE_POWER_OFF:
3347 return MGMT_DEV_DISCONN_REMOTE;
3348 case HCI_ERROR_LOCAL_HOST_TERM:
3349 return MGMT_DEV_DISCONN_LOCAL_HOST;
3350 default:
3351 return MGMT_DEV_DISCONN_UNKNOWN;
3352 }
3353 }
3354
hci_disconn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3355 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
3356 struct sk_buff *skb)
3357 {
3358 struct hci_ev_disconn_complete *ev = data;
3359 u8 reason;
3360 struct hci_conn_params *params;
3361 struct hci_conn *conn;
3362 bool mgmt_connected;
3363
3364 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3365
3366 hci_dev_lock(hdev);
3367
3368 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3369 if (!conn)
3370 goto unlock;
3371
3372 if (ev->status) {
3373 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
3374 conn->dst_type, ev->status);
3375 goto unlock;
3376 }
3377
3378 conn->state = BT_CLOSED;
3379
3380 mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
3381
3382 if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
3383 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
3384 else
3385 reason = hci_to_mgmt_reason(ev->reason);
3386
3387 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
3388 reason, mgmt_connected);
3389
3390 if (conn->type == ACL_LINK) {
3391 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
3392 hci_remove_link_key(hdev, &conn->dst);
3393
3394 hci_update_scan(hdev);
3395 }
3396
3397 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
3398 if (params) {
3399 switch (params->auto_connect) {
3400 case HCI_AUTO_CONN_LINK_LOSS:
3401 if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
3402 break;
3403 fallthrough;
3404
3405 case HCI_AUTO_CONN_DIRECT:
3406 case HCI_AUTO_CONN_ALWAYS:
3407 hci_pend_le_list_del_init(params);
3408 hci_pend_le_list_add(params, &hdev->pend_le_conns);
3409 hci_update_passive_scan(hdev);
3410 break;
3411
3412 default:
3413 break;
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 struct hci_cp_read_enc_key_size cp;
3609
3610 /* Only send HCI_Read_Encryption_Key_Size if the
3611 * controller really supports it. If it doesn't, assume
3612 * the default size (16).
3613 */
3614 if (!read_key_size_capable(hdev)) {
3615 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3616 goto notify;
3617 }
3618
3619 cp.handle = cpu_to_le16(conn->handle);
3620 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3621 sizeof(cp), &cp)) {
3622 bt_dev_err(hdev, "sending read key size failed");
3623 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3624 goto notify;
3625 }
3626
3627 goto unlock;
3628 }
3629
3630 /* We skip the WRITE_AUTH_PAYLOAD_TIMEOUT for ATS2851 based controllers
3631 * to avoid unexpected SMP command errors when pairing.
3632 */
3633 if (test_bit(HCI_QUIRK_BROKEN_WRITE_AUTH_PAYLOAD_TIMEOUT,
3634 &hdev->quirks))
3635 goto notify;
3636
3637 /* Set the default Authenticated Payload Timeout after
3638 * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
3639 * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
3640 * sent when the link is active and Encryption is enabled, the conn
3641 * type can be either LE or ACL and controller must support LMP Ping.
3642 * Ensure for AES-CCM encryption as well.
3643 */
3644 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3645 test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
3646 ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
3647 (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
3648 struct hci_cp_write_auth_payload_to cp;
3649
3650 cp.handle = cpu_to_le16(conn->handle);
3651 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
3652 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
3653 sizeof(cp), &cp))
3654 bt_dev_err(hdev, "write auth payload timeout failed");
3655 }
3656
3657 notify:
3658 hci_encrypt_cfm(conn, ev->status);
3659
3660 unlock:
3661 hci_dev_unlock(hdev);
3662 }
3663
hci_change_link_key_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3664 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data,
3665 struct sk_buff *skb)
3666 {
3667 struct hci_ev_change_link_key_complete *ev = data;
3668 struct hci_conn *conn;
3669
3670 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3671
3672 hci_dev_lock(hdev);
3673
3674 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3675 if (conn) {
3676 if (!ev->status)
3677 set_bit(HCI_CONN_SECURE, &conn->flags);
3678
3679 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3680
3681 hci_key_change_cfm(conn, ev->status);
3682 }
3683
3684 hci_dev_unlock(hdev);
3685 }
3686
hci_remote_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3687 static void hci_remote_features_evt(struct hci_dev *hdev, void *data,
3688 struct sk_buff *skb)
3689 {
3690 struct hci_ev_remote_features *ev = data;
3691 struct hci_conn *conn;
3692
3693 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3694
3695 hci_dev_lock(hdev);
3696
3697 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3698 if (!conn)
3699 goto unlock;
3700
3701 if (!ev->status)
3702 memcpy(conn->features[0], ev->features, 8);
3703
3704 if (conn->state != BT_CONFIG)
3705 goto unlock;
3706
3707 if (!ev->status && lmp_ext_feat_capable(hdev) &&
3708 lmp_ext_feat_capable(conn)) {
3709 struct hci_cp_read_remote_ext_features cp;
3710 cp.handle = ev->handle;
3711 cp.page = 0x01;
3712 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
3713 sizeof(cp), &cp);
3714 goto unlock;
3715 }
3716
3717 if (!ev->status) {
3718 struct hci_cp_remote_name_req cp;
3719 memset(&cp, 0, sizeof(cp));
3720 bacpy(&cp.bdaddr, &conn->dst);
3721 cp.pscan_rep_mode = 0x02;
3722 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
3723 } else {
3724 mgmt_device_connected(hdev, conn, NULL, 0);
3725 }
3726
3727 if (!hci_outgoing_auth_needed(hdev, conn)) {
3728 conn->state = BT_CONNECTED;
3729 hci_connect_cfm(conn, ev->status);
3730 hci_conn_drop(conn);
3731 }
3732
3733 unlock:
3734 hci_dev_unlock(hdev);
3735 }
3736
handle_cmd_cnt_and_timer(struct hci_dev * hdev,u8 ncmd)3737 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd)
3738 {
3739 cancel_delayed_work(&hdev->cmd_timer);
3740
3741 rcu_read_lock();
3742 if (!test_bit(HCI_RESET, &hdev->flags)) {
3743 if (ncmd) {
3744 cancel_delayed_work(&hdev->ncmd_timer);
3745 atomic_set(&hdev->cmd_cnt, 1);
3746 } else {
3747 if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
3748 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer,
3749 HCI_NCMD_TIMEOUT);
3750 }
3751 }
3752 rcu_read_unlock();
3753 }
3754
hci_cc_le_read_buffer_size_v2(struct hci_dev * hdev,void * data,struct sk_buff * skb)3755 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data,
3756 struct sk_buff *skb)
3757 {
3758 struct hci_rp_le_read_buffer_size_v2 *rp = data;
3759
3760 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3761
3762 if (rp->status)
3763 return rp->status;
3764
3765 hdev->le_mtu = __le16_to_cpu(rp->acl_mtu);
3766 hdev->le_pkts = rp->acl_max_pkt;
3767 hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu);
3768 hdev->iso_pkts = rp->iso_max_pkt;
3769
3770 hdev->le_cnt = hdev->le_pkts;
3771 hdev->iso_cnt = hdev->iso_pkts;
3772
3773 BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
3774 hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
3775
3776 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
3777 return HCI_ERROR_INVALID_PARAMETERS;
3778
3779 return rp->status;
3780 }
3781
hci_unbound_cis_failed(struct hci_dev * hdev,u8 cig,u8 status)3782 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status)
3783 {
3784 struct hci_conn *conn, *tmp;
3785
3786 lockdep_assert_held(&hdev->lock);
3787
3788 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
3789 if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY) ||
3790 conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig)
3791 continue;
3792
3793 if (HCI_CONN_HANDLE_UNSET(conn->handle))
3794 hci_conn_failed(conn, status);
3795 }
3796 }
3797
hci_cc_le_set_cig_params(struct hci_dev * hdev,void * data,struct sk_buff * skb)3798 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
3799 struct sk_buff *skb)
3800 {
3801 struct hci_rp_le_set_cig_params *rp = data;
3802 struct hci_cp_le_set_cig_params *cp;
3803 struct hci_conn *conn;
3804 u8 status = rp->status;
3805 bool pending = false;
3806 int i;
3807
3808 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3809
3810 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
3811 if (!rp->status && (!cp || rp->num_handles != cp->num_cis ||
3812 rp->cig_id != cp->cig_id)) {
3813 bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
3814 status = HCI_ERROR_UNSPECIFIED;
3815 }
3816
3817 hci_dev_lock(hdev);
3818
3819 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554
3820 *
3821 * If the Status return parameter is non-zero, then the state of the CIG
3822 * and its CIS configurations shall not be changed by the command. If
3823 * the CIG did not already exist, it shall not be created.
3824 */
3825 if (status) {
3826 /* Keep current configuration, fail only the unbound CIS */
3827 hci_unbound_cis_failed(hdev, rp->cig_id, status);
3828 goto unlock;
3829 }
3830
3831 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
3832 *
3833 * If the Status return parameter is zero, then the Controller shall
3834 * set the Connection_Handle arrayed return parameter to the connection
3835 * handle(s) corresponding to the CIS configurations specified in
3836 * the CIS_IDs command parameter, in the same order.
3837 */
3838 for (i = 0; i < rp->num_handles; ++i) {
3839 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
3840 cp->cis[i].cis_id);
3841 if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
3842 continue;
3843
3844 if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
3845 continue;
3846
3847 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i])))
3848 continue;
3849
3850 if (conn->state == BT_CONNECT)
3851 pending = true;
3852 }
3853
3854 unlock:
3855 if (pending)
3856 hci_le_create_cis_pending(hdev);
3857
3858 hci_dev_unlock(hdev);
3859
3860 return rp->status;
3861 }
3862
hci_cc_le_setup_iso_path(struct hci_dev * hdev,void * data,struct sk_buff * skb)3863 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data,
3864 struct sk_buff *skb)
3865 {
3866 struct hci_rp_le_setup_iso_path *rp = data;
3867 struct hci_cp_le_setup_iso_path *cp;
3868 struct hci_conn *conn;
3869
3870 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3871
3872 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH);
3873 if (!cp)
3874 return rp->status;
3875
3876 hci_dev_lock(hdev);
3877
3878 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
3879 if (!conn)
3880 goto unlock;
3881
3882 if (rp->status) {
3883 hci_connect_cfm(conn, rp->status);
3884 hci_conn_del(conn);
3885 goto unlock;
3886 }
3887
3888 switch (cp->direction) {
3889 /* Input (Host to Controller) */
3890 case 0x00:
3891 /* Only confirm connection if output only */
3892 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu)
3893 hci_connect_cfm(conn, rp->status);
3894 break;
3895 /* Output (Controller to Host) */
3896 case 0x01:
3897 /* Confirm connection since conn->iso_qos is always configured
3898 * last.
3899 */
3900 hci_connect_cfm(conn, rp->status);
3901
3902 /* Notify device connected in case it is a BIG Sync */
3903 if (!rp->status && test_bit(HCI_CONN_BIG_SYNC, &conn->flags))
3904 mgmt_device_connected(hdev, conn, NULL, 0);
3905
3906 break;
3907 }
3908
3909 unlock:
3910 hci_dev_unlock(hdev);
3911 return rp->status;
3912 }
3913
hci_cs_le_create_big(struct hci_dev * hdev,u8 status)3914 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status)
3915 {
3916 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3917 }
3918
hci_cc_set_per_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)3919 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data,
3920 struct sk_buff *skb)
3921 {
3922 struct hci_ev_status *rp = data;
3923 struct hci_cp_le_set_per_adv_params *cp;
3924
3925 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3926
3927 if (rp->status)
3928 return rp->status;
3929
3930 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS);
3931 if (!cp)
3932 return rp->status;
3933
3934 /* TODO: set the conn state */
3935 return rp->status;
3936 }
3937
hci_cc_le_set_per_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)3938 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data,
3939 struct sk_buff *skb)
3940 {
3941 struct hci_ev_status *rp = data;
3942 struct hci_cp_le_set_per_adv_enable *cp;
3943 struct adv_info *adv = NULL, *n;
3944 u8 per_adv_cnt = 0;
3945
3946 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3947
3948 if (rp->status)
3949 return rp->status;
3950
3951 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE);
3952 if (!cp)
3953 return rp->status;
3954
3955 hci_dev_lock(hdev);
3956
3957 adv = hci_find_adv_instance(hdev, cp->handle);
3958
3959 if (cp->enable) {
3960 hci_dev_set_flag(hdev, HCI_LE_PER_ADV);
3961
3962 if (adv)
3963 adv->enabled = true;
3964 } else {
3965 /* If just one instance was disabled check if there are
3966 * any other instance enabled before clearing HCI_LE_PER_ADV.
3967 * The current periodic adv instance will be marked as
3968 * disabled once extended advertising is also disabled.
3969 */
3970 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
3971 list) {
3972 if (adv->periodic && adv->enabled)
3973 per_adv_cnt++;
3974 }
3975
3976 if (per_adv_cnt > 1)
3977 goto unlock;
3978
3979 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV);
3980 }
3981
3982 unlock:
3983 hci_dev_unlock(hdev);
3984
3985 return rp->status;
3986 }
3987
3988 #define HCI_CC_VL(_op, _func, _min, _max) \
3989 { \
3990 .op = _op, \
3991 .func = _func, \
3992 .min_len = _min, \
3993 .max_len = _max, \
3994 }
3995
3996 #define HCI_CC(_op, _func, _len) \
3997 HCI_CC_VL(_op, _func, _len, _len)
3998
3999 #define HCI_CC_STATUS(_op, _func) \
4000 HCI_CC(_op, _func, sizeof(struct hci_ev_status))
4001
4002 static const struct hci_cc {
4003 u16 op;
4004 u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
4005 u16 min_len;
4006 u16 max_len;
4007 } hci_cc_table[] = {
4008 HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel),
4009 HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq),
4010 HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq),
4011 HCI_CC_STATUS(HCI_OP_REMOTE_NAME_REQ_CANCEL,
4012 hci_cc_remote_name_req_cancel),
4013 HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery,
4014 sizeof(struct hci_rp_role_discovery)),
4015 HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy,
4016 sizeof(struct hci_rp_read_link_policy)),
4017 HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy,
4018 sizeof(struct hci_rp_write_link_policy)),
4019 HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy,
4020 sizeof(struct hci_rp_read_def_link_policy)),
4021 HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY,
4022 hci_cc_write_def_link_policy),
4023 HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset),
4024 HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key,
4025 sizeof(struct hci_rp_read_stored_link_key)),
4026 HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key,
4027 sizeof(struct hci_rp_delete_stored_link_key)),
4028 HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name),
4029 HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name,
4030 sizeof(struct hci_rp_read_local_name)),
4031 HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable),
4032 HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
4033 HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable),
4034 HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter),
4035 HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev,
4036 sizeof(struct hci_rp_read_class_of_dev)),
4037 HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev),
4038 HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting,
4039 sizeof(struct hci_rp_read_voice_setting)),
4040 HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting),
4041 HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac,
4042 sizeof(struct hci_rp_read_num_supported_iac)),
4043 HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode),
4044 HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support),
4045 HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout,
4046 sizeof(struct hci_rp_read_auth_payload_to)),
4047 HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout,
4048 sizeof(struct hci_rp_write_auth_payload_to)),
4049 HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version,
4050 sizeof(struct hci_rp_read_local_version)),
4051 HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands,
4052 sizeof(struct hci_rp_read_local_commands)),
4053 HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features,
4054 sizeof(struct hci_rp_read_local_features)),
4055 HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features,
4056 sizeof(struct hci_rp_read_local_ext_features)),
4057 HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size,
4058 sizeof(struct hci_rp_read_buffer_size)),
4059 HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr,
4060 sizeof(struct hci_rp_read_bd_addr)),
4061 HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts,
4062 sizeof(struct hci_rp_read_local_pairing_opts)),
4063 HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity,
4064 sizeof(struct hci_rp_read_page_scan_activity)),
4065 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
4066 hci_cc_write_page_scan_activity),
4067 HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type,
4068 sizeof(struct hci_rp_read_page_scan_type)),
4069 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type),
4070 HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock,
4071 sizeof(struct hci_rp_read_clock)),
4072 HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size,
4073 sizeof(struct hci_rp_read_enc_key_size)),
4074 HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power,
4075 sizeof(struct hci_rp_read_inq_rsp_tx_power)),
4076 HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4077 hci_cc_read_def_err_data_reporting,
4078 sizeof(struct hci_rp_read_def_err_data_reporting)),
4079 HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4080 hci_cc_write_def_err_data_reporting),
4081 HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply,
4082 sizeof(struct hci_rp_pin_code_reply)),
4083 HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply,
4084 sizeof(struct hci_rp_pin_code_neg_reply)),
4085 HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data,
4086 sizeof(struct hci_rp_read_local_oob_data)),
4087 HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data,
4088 sizeof(struct hci_rp_read_local_oob_ext_data)),
4089 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size,
4090 sizeof(struct hci_rp_le_read_buffer_size)),
4091 HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features,
4092 sizeof(struct hci_rp_le_read_local_features)),
4093 HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power,
4094 sizeof(struct hci_rp_le_read_adv_tx_power)),
4095 HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply,
4096 sizeof(struct hci_rp_user_confirm_reply)),
4097 HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply,
4098 sizeof(struct hci_rp_user_confirm_reply)),
4099 HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply,
4100 sizeof(struct hci_rp_user_confirm_reply)),
4101 HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply,
4102 sizeof(struct hci_rp_user_confirm_reply)),
4103 HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr),
4104 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable),
4105 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param),
4106 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable),
4107 HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4108 hci_cc_le_read_accept_list_size,
4109 sizeof(struct hci_rp_le_read_accept_list_size)),
4110 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list),
4111 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST,
4112 hci_cc_le_add_to_accept_list),
4113 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
4114 hci_cc_le_del_from_accept_list),
4115 HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states,
4116 sizeof(struct hci_rp_le_read_supported_states)),
4117 HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len,
4118 sizeof(struct hci_rp_le_read_def_data_len)),
4119 HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN,
4120 hci_cc_le_write_def_data_len),
4121 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST,
4122 hci_cc_le_add_to_resolv_list),
4123 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST,
4124 hci_cc_le_del_from_resolv_list),
4125 HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST,
4126 hci_cc_le_clear_resolv_list),
4127 HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size,
4128 sizeof(struct hci_rp_le_read_resolv_list_size)),
4129 HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
4130 hci_cc_le_set_addr_resolution_enable),
4131 HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len,
4132 sizeof(struct hci_rp_le_read_max_data_len)),
4133 HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED,
4134 hci_cc_write_le_host_supported),
4135 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param),
4136 HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi,
4137 sizeof(struct hci_rp_read_rssi)),
4138 HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power,
4139 sizeof(struct hci_rp_read_tx_power)),
4140 HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode),
4141 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS,
4142 hci_cc_le_set_ext_scan_param),
4143 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE,
4144 hci_cc_le_set_ext_scan_enable),
4145 HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy),
4146 HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4147 hci_cc_le_read_num_adv_sets,
4148 sizeof(struct hci_rp_le_read_num_supported_adv_sets)),
4149 HCI_CC(HCI_OP_LE_SET_EXT_ADV_PARAMS, hci_cc_set_ext_adv_param,
4150 sizeof(struct hci_rp_le_set_ext_adv_params)),
4151 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE,
4152 hci_cc_le_set_ext_adv_enable),
4153 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
4154 hci_cc_le_set_adv_set_random_addr),
4155 HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set),
4156 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets),
4157 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param),
4158 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE,
4159 hci_cc_le_set_per_adv_enable),
4160 HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power,
4161 sizeof(struct hci_rp_le_read_transmit_power)),
4162 HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode),
4163 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2,
4164 sizeof(struct hci_rp_le_read_buffer_size_v2)),
4165 HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params,
4166 sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE),
4167 HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path,
4168 sizeof(struct hci_rp_le_setup_iso_path)),
4169 };
4170
hci_cc_func(struct hci_dev * hdev,const struct hci_cc * cc,struct sk_buff * skb)4171 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc,
4172 struct sk_buff *skb)
4173 {
4174 void *data;
4175
4176 if (skb->len < cc->min_len) {
4177 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u",
4178 cc->op, skb->len, cc->min_len);
4179 return HCI_ERROR_UNSPECIFIED;
4180 }
4181
4182 /* Just warn if the length is over max_len size it still be possible to
4183 * partially parse the cc so leave to callback to decide if that is
4184 * acceptable.
4185 */
4186 if (skb->len > cc->max_len)
4187 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u",
4188 cc->op, skb->len, cc->max_len);
4189
4190 data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len);
4191 if (!data)
4192 return HCI_ERROR_UNSPECIFIED;
4193
4194 return cc->func(hdev, data, skb);
4195 }
4196
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)4197 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
4198 struct sk_buff *skb, u16 *opcode, u8 *status,
4199 hci_req_complete_t *req_complete,
4200 hci_req_complete_skb_t *req_complete_skb)
4201 {
4202 struct hci_ev_cmd_complete *ev = data;
4203 int i;
4204
4205 *opcode = __le16_to_cpu(ev->opcode);
4206
4207 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4208
4209 for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) {
4210 if (hci_cc_table[i].op == *opcode) {
4211 *status = hci_cc_func(hdev, &hci_cc_table[i], skb);
4212 break;
4213 }
4214 }
4215
4216 if (i == ARRAY_SIZE(hci_cc_table)) {
4217 /* Unknown opcode, assume byte 0 contains the status, so
4218 * that e.g. __hci_cmd_sync() properly returns errors
4219 * for vendor specific commands send by HCI drivers.
4220 * If a vendor doesn't actually follow this convention we may
4221 * need to introduce a vendor CC table in order to properly set
4222 * the status.
4223 */
4224 *status = skb->data[0];
4225 }
4226
4227 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4228
4229 hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
4230 req_complete_skb);
4231
4232 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4233 bt_dev_err(hdev,
4234 "unexpected event for opcode 0x%4.4x", *opcode);
4235 return;
4236 }
4237
4238 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4239 queue_work(hdev->workqueue, &hdev->cmd_work);
4240 }
4241
hci_cs_le_create_cis(struct hci_dev * hdev,u8 status)4242 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
4243 {
4244 struct hci_cp_le_create_cis *cp;
4245 bool pending = false;
4246 int i;
4247
4248 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4249
4250 if (!status)
4251 return;
4252
4253 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
4254 if (!cp)
4255 return;
4256
4257 hci_dev_lock(hdev);
4258
4259 /* Remove connection if command failed */
4260 for (i = 0; cp->num_cis; cp->num_cis--, i++) {
4261 struct hci_conn *conn;
4262 u16 handle;
4263
4264 handle = __le16_to_cpu(cp->cis[i].cis_handle);
4265
4266 conn = hci_conn_hash_lookup_handle(hdev, handle);
4267 if (conn) {
4268 if (test_and_clear_bit(HCI_CONN_CREATE_CIS,
4269 &conn->flags))
4270 pending = true;
4271 conn->state = BT_CLOSED;
4272 hci_connect_cfm(conn, status);
4273 hci_conn_del(conn);
4274 }
4275 }
4276
4277 if (pending)
4278 hci_le_create_cis_pending(hdev);
4279
4280 hci_dev_unlock(hdev);
4281 }
4282
4283 #define HCI_CS(_op, _func) \
4284 { \
4285 .op = _op, \
4286 .func = _func, \
4287 }
4288
4289 static const struct hci_cs {
4290 u16 op;
4291 void (*func)(struct hci_dev *hdev, __u8 status);
4292 } hci_cs_table[] = {
4293 HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry),
4294 HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn),
4295 HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect),
4296 HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco),
4297 HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested),
4298 HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt),
4299 HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req),
4300 HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features),
4301 HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES,
4302 hci_cs_read_remote_ext_features),
4303 HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn),
4304 HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN,
4305 hci_cs_enhanced_setup_sync_conn),
4306 HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode),
4307 HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode),
4308 HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role),
4309 HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn),
4310 HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features),
4311 HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc),
4312 HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn),
4313 HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis),
4314 HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big),
4315 };
4316
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)4317 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data,
4318 struct sk_buff *skb, u16 *opcode, u8 *status,
4319 hci_req_complete_t *req_complete,
4320 hci_req_complete_skb_t *req_complete_skb)
4321 {
4322 struct hci_ev_cmd_status *ev = data;
4323 int i;
4324
4325 *opcode = __le16_to_cpu(ev->opcode);
4326 *status = ev->status;
4327
4328 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4329
4330 for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) {
4331 if (hci_cs_table[i].op == *opcode) {
4332 hci_cs_table[i].func(hdev, ev->status);
4333 break;
4334 }
4335 }
4336
4337 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4338
4339 /* Indicate request completion if the command failed. Also, if
4340 * we're not waiting for a special event and we get a success
4341 * command status we should try to flag the request as completed
4342 * (since for this kind of commands there will not be a command
4343 * complete event).
4344 */
4345 if (ev->status || (hdev->req_skb && !hci_skb_event(hdev->req_skb))) {
4346 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
4347 req_complete_skb);
4348 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4349 bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x",
4350 *opcode);
4351 return;
4352 }
4353 }
4354
4355 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4356 queue_work(hdev->workqueue, &hdev->cmd_work);
4357 }
4358
hci_hardware_error_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4359 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data,
4360 struct sk_buff *skb)
4361 {
4362 struct hci_ev_hardware_error *ev = data;
4363
4364 bt_dev_dbg(hdev, "code 0x%2.2x", ev->code);
4365
4366 hdev->hw_error_code = ev->code;
4367
4368 queue_work(hdev->req_workqueue, &hdev->error_reset);
4369 }
4370
hci_role_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4371 static void hci_role_change_evt(struct hci_dev *hdev, void *data,
4372 struct sk_buff *skb)
4373 {
4374 struct hci_ev_role_change *ev = data;
4375 struct hci_conn *conn;
4376
4377 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4378
4379 hci_dev_lock(hdev);
4380
4381 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4382 if (conn) {
4383 if (!ev->status)
4384 conn->role = ev->role;
4385
4386 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
4387
4388 hci_role_switch_cfm(conn, ev->status, ev->role);
4389 }
4390
4391 hci_dev_unlock(hdev);
4392 }
4393
hci_num_comp_pkts_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4394 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data,
4395 struct sk_buff *skb)
4396 {
4397 struct hci_ev_num_comp_pkts *ev = data;
4398 int i;
4399
4400 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS,
4401 flex_array_size(ev, handles, ev->num)))
4402 return;
4403
4404 bt_dev_dbg(hdev, "num %d", ev->num);
4405
4406 for (i = 0; i < ev->num; i++) {
4407 struct hci_comp_pkts_info *info = &ev->handles[i];
4408 struct hci_conn *conn;
4409 __u16 handle, count;
4410
4411 handle = __le16_to_cpu(info->handle);
4412 count = __le16_to_cpu(info->count);
4413
4414 conn = hci_conn_hash_lookup_handle(hdev, handle);
4415 if (!conn)
4416 continue;
4417
4418 conn->sent -= count;
4419
4420 switch (conn->type) {
4421 case ACL_LINK:
4422 hdev->acl_cnt += count;
4423 if (hdev->acl_cnt > hdev->acl_pkts)
4424 hdev->acl_cnt = hdev->acl_pkts;
4425 break;
4426
4427 case LE_LINK:
4428 if (hdev->le_pkts) {
4429 hdev->le_cnt += count;
4430 if (hdev->le_cnt > hdev->le_pkts)
4431 hdev->le_cnt = hdev->le_pkts;
4432 } else {
4433 hdev->acl_cnt += count;
4434 if (hdev->acl_cnt > hdev->acl_pkts)
4435 hdev->acl_cnt = hdev->acl_pkts;
4436 }
4437 break;
4438
4439 case SCO_LINK:
4440 hdev->sco_cnt += count;
4441 if (hdev->sco_cnt > hdev->sco_pkts)
4442 hdev->sco_cnt = hdev->sco_pkts;
4443 break;
4444
4445 case ISO_LINK:
4446 if (hdev->iso_pkts) {
4447 hdev->iso_cnt += count;
4448 if (hdev->iso_cnt > hdev->iso_pkts)
4449 hdev->iso_cnt = hdev->iso_pkts;
4450 } else if (hdev->le_pkts) {
4451 hdev->le_cnt += count;
4452 if (hdev->le_cnt > hdev->le_pkts)
4453 hdev->le_cnt = hdev->le_pkts;
4454 } else {
4455 hdev->acl_cnt += count;
4456 if (hdev->acl_cnt > hdev->acl_pkts)
4457 hdev->acl_cnt = hdev->acl_pkts;
4458 }
4459 break;
4460
4461 default:
4462 bt_dev_err(hdev, "unknown type %d conn %p",
4463 conn->type, conn);
4464 break;
4465 }
4466 }
4467
4468 queue_work(hdev->workqueue, &hdev->tx_work);
4469 }
4470
hci_mode_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4471 static void hci_mode_change_evt(struct hci_dev *hdev, void *data,
4472 struct sk_buff *skb)
4473 {
4474 struct hci_ev_mode_change *ev = data;
4475 struct hci_conn *conn;
4476
4477 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4478
4479 hci_dev_lock(hdev);
4480
4481 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4482 if (conn) {
4483 conn->mode = ev->mode;
4484
4485 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
4486 &conn->flags)) {
4487 if (conn->mode == HCI_CM_ACTIVE)
4488 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4489 else
4490 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4491 }
4492
4493 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
4494 hci_sco_setup(conn, ev->status);
4495 }
4496
4497 hci_dev_unlock(hdev);
4498 }
4499
hci_pin_code_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4500 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data,
4501 struct sk_buff *skb)
4502 {
4503 struct hci_ev_pin_code_req *ev = data;
4504 struct hci_conn *conn;
4505
4506 bt_dev_dbg(hdev, "");
4507
4508 hci_dev_lock(hdev);
4509
4510 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4511 if (!conn)
4512 goto unlock;
4513
4514 if (conn->state == BT_CONNECTED) {
4515 hci_conn_hold(conn);
4516 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
4517 hci_conn_drop(conn);
4518 }
4519
4520 if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
4521 !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
4522 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
4523 sizeof(ev->bdaddr), &ev->bdaddr);
4524 } else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4525 u8 secure;
4526
4527 if (conn->pending_sec_level == BT_SECURITY_HIGH)
4528 secure = 1;
4529 else
4530 secure = 0;
4531
4532 mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
4533 }
4534
4535 unlock:
4536 hci_dev_unlock(hdev);
4537 }
4538
conn_set_key(struct hci_conn * conn,u8 key_type,u8 pin_len)4539 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
4540 {
4541 if (key_type == HCI_LK_CHANGED_COMBINATION)
4542 return;
4543
4544 conn->pin_length = pin_len;
4545 conn->key_type = key_type;
4546
4547 switch (key_type) {
4548 case HCI_LK_LOCAL_UNIT:
4549 case HCI_LK_REMOTE_UNIT:
4550 case HCI_LK_DEBUG_COMBINATION:
4551 return;
4552 case HCI_LK_COMBINATION:
4553 if (pin_len == 16)
4554 conn->pending_sec_level = BT_SECURITY_HIGH;
4555 else
4556 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4557 break;
4558 case HCI_LK_UNAUTH_COMBINATION_P192:
4559 case HCI_LK_UNAUTH_COMBINATION_P256:
4560 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4561 break;
4562 case HCI_LK_AUTH_COMBINATION_P192:
4563 conn->pending_sec_level = BT_SECURITY_HIGH;
4564 break;
4565 case HCI_LK_AUTH_COMBINATION_P256:
4566 conn->pending_sec_level = BT_SECURITY_FIPS;
4567 break;
4568 }
4569 }
4570
hci_link_key_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4571 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data,
4572 struct sk_buff *skb)
4573 {
4574 struct hci_ev_link_key_req *ev = data;
4575 struct hci_cp_link_key_reply cp;
4576 struct hci_conn *conn;
4577 struct link_key *key;
4578
4579 bt_dev_dbg(hdev, "");
4580
4581 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4582 return;
4583
4584 hci_dev_lock(hdev);
4585
4586 key = hci_find_link_key(hdev, &ev->bdaddr);
4587 if (!key) {
4588 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr);
4589 goto not_found;
4590 }
4591
4592 bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr);
4593
4594 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4595 if (conn) {
4596 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4597
4598 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
4599 key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
4600 conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
4601 bt_dev_dbg(hdev, "ignoring unauthenticated key");
4602 goto not_found;
4603 }
4604
4605 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
4606 (conn->pending_sec_level == BT_SECURITY_HIGH ||
4607 conn->pending_sec_level == BT_SECURITY_FIPS)) {
4608 bt_dev_dbg(hdev, "ignoring key unauthenticated for high security");
4609 goto not_found;
4610 }
4611
4612 conn_set_key(conn, key->type, key->pin_len);
4613 }
4614
4615 bacpy(&cp.bdaddr, &ev->bdaddr);
4616 memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
4617
4618 hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
4619
4620 hci_dev_unlock(hdev);
4621
4622 return;
4623
4624 not_found:
4625 hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
4626 hci_dev_unlock(hdev);
4627 }
4628
hci_link_key_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4629 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data,
4630 struct sk_buff *skb)
4631 {
4632 struct hci_ev_link_key_notify *ev = data;
4633 struct hci_conn *conn;
4634 struct link_key *key;
4635 bool persistent;
4636 u8 pin_len = 0;
4637
4638 bt_dev_dbg(hdev, "");
4639
4640 hci_dev_lock(hdev);
4641
4642 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4643 if (!conn)
4644 goto unlock;
4645
4646 /* Ignore NULL link key against CVE-2020-26555 */
4647 if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
4648 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
4649 &ev->bdaddr);
4650 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
4651 hci_conn_drop(conn);
4652 goto unlock;
4653 }
4654
4655 hci_conn_hold(conn);
4656 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
4657 hci_conn_drop(conn);
4658
4659 set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4660 conn_set_key(conn, ev->key_type, conn->pin_length);
4661
4662 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4663 goto unlock;
4664
4665 key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
4666 ev->key_type, pin_len, &persistent);
4667 if (!key)
4668 goto unlock;
4669
4670 /* Update connection information since adding the key will have
4671 * fixed up the type in the case of changed combination keys.
4672 */
4673 if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
4674 conn_set_key(conn, key->type, key->pin_len);
4675
4676 mgmt_new_link_key(hdev, key, persistent);
4677
4678 /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
4679 * is set. If it's not set simply remove the key from the kernel
4680 * list (we've still notified user space about it but with
4681 * store_hint being 0).
4682 */
4683 if (key->type == HCI_LK_DEBUG_COMBINATION &&
4684 !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
4685 list_del_rcu(&key->list);
4686 kfree_rcu(key, rcu);
4687 goto unlock;
4688 }
4689
4690 if (persistent)
4691 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4692 else
4693 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4694
4695 unlock:
4696 hci_dev_unlock(hdev);
4697 }
4698
hci_clock_offset_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4699 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data,
4700 struct sk_buff *skb)
4701 {
4702 struct hci_ev_clock_offset *ev = data;
4703 struct hci_conn *conn;
4704
4705 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4706
4707 hci_dev_lock(hdev);
4708
4709 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4710 if (conn && !ev->status) {
4711 struct inquiry_entry *ie;
4712
4713 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4714 if (ie) {
4715 ie->data.clock_offset = ev->clock_offset;
4716 ie->timestamp = jiffies;
4717 }
4718 }
4719
4720 hci_dev_unlock(hdev);
4721 }
4722
hci_pkt_type_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4723 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data,
4724 struct sk_buff *skb)
4725 {
4726 struct hci_ev_pkt_type_change *ev = data;
4727 struct hci_conn *conn;
4728
4729 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4730
4731 hci_dev_lock(hdev);
4732
4733 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4734 if (conn && !ev->status)
4735 conn->pkt_type = __le16_to_cpu(ev->pkt_type);
4736
4737 hci_dev_unlock(hdev);
4738 }
4739
hci_pscan_rep_mode_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4740 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data,
4741 struct sk_buff *skb)
4742 {
4743 struct hci_ev_pscan_rep_mode *ev = data;
4744 struct inquiry_entry *ie;
4745
4746 bt_dev_dbg(hdev, "");
4747
4748 hci_dev_lock(hdev);
4749
4750 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
4751 if (ie) {
4752 ie->data.pscan_rep_mode = ev->pscan_rep_mode;
4753 ie->timestamp = jiffies;
4754 }
4755
4756 hci_dev_unlock(hdev);
4757 }
4758
hci_inquiry_result_with_rssi_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)4759 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
4760 struct sk_buff *skb)
4761 {
4762 struct hci_ev_inquiry_result_rssi *ev = edata;
4763 struct inquiry_data data;
4764 int i;
4765
4766 bt_dev_dbg(hdev, "num_rsp %d", ev->num);
4767
4768 if (!ev->num)
4769 return;
4770
4771 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
4772 return;
4773
4774 hci_dev_lock(hdev);
4775
4776 if (skb->len == array_size(ev->num,
4777 sizeof(struct inquiry_info_rssi_pscan))) {
4778 struct inquiry_info_rssi_pscan *info;
4779
4780 for (i = 0; i < ev->num; i++) {
4781 u32 flags;
4782
4783 info = hci_ev_skb_pull(hdev, skb,
4784 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4785 sizeof(*info));
4786 if (!info) {
4787 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4788 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4789 goto unlock;
4790 }
4791
4792 bacpy(&data.bdaddr, &info->bdaddr);
4793 data.pscan_rep_mode = info->pscan_rep_mode;
4794 data.pscan_period_mode = info->pscan_period_mode;
4795 data.pscan_mode = info->pscan_mode;
4796 memcpy(data.dev_class, info->dev_class, 3);
4797 data.clock_offset = info->clock_offset;
4798 data.rssi = info->rssi;
4799 data.ssp_mode = 0x00;
4800
4801 flags = hci_inquiry_cache_update(hdev, &data, false);
4802
4803 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4804 info->dev_class, info->rssi,
4805 flags, NULL, 0, NULL, 0, 0);
4806 }
4807 } else if (skb->len == array_size(ev->num,
4808 sizeof(struct inquiry_info_rssi))) {
4809 struct inquiry_info_rssi *info;
4810
4811 for (i = 0; i < ev->num; i++) {
4812 u32 flags;
4813
4814 info = hci_ev_skb_pull(hdev, skb,
4815 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4816 sizeof(*info));
4817 if (!info) {
4818 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4819 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4820 goto unlock;
4821 }
4822
4823 bacpy(&data.bdaddr, &info->bdaddr);
4824 data.pscan_rep_mode = info->pscan_rep_mode;
4825 data.pscan_period_mode = info->pscan_period_mode;
4826 data.pscan_mode = 0x00;
4827 memcpy(data.dev_class, info->dev_class, 3);
4828 data.clock_offset = info->clock_offset;
4829 data.rssi = info->rssi;
4830 data.ssp_mode = 0x00;
4831
4832 flags = hci_inquiry_cache_update(hdev, &data, false);
4833
4834 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4835 info->dev_class, info->rssi,
4836 flags, NULL, 0, NULL, 0, 0);
4837 }
4838 } else {
4839 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4840 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4841 }
4842 unlock:
4843 hci_dev_unlock(hdev);
4844 }
4845
hci_remote_ext_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4846 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data,
4847 struct sk_buff *skb)
4848 {
4849 struct hci_ev_remote_ext_features *ev = data;
4850 struct hci_conn *conn;
4851
4852 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4853
4854 hci_dev_lock(hdev);
4855
4856 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4857 if (!conn)
4858 goto unlock;
4859
4860 if (ev->page < HCI_MAX_PAGES)
4861 memcpy(conn->features[ev->page], ev->features, 8);
4862
4863 if (!ev->status && ev->page == 0x01) {
4864 struct inquiry_entry *ie;
4865
4866 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4867 if (ie)
4868 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4869
4870 if (ev->features[0] & LMP_HOST_SSP) {
4871 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4872 } else {
4873 /* It is mandatory by the Bluetooth specification that
4874 * Extended Inquiry Results are only used when Secure
4875 * Simple Pairing is enabled, but some devices violate
4876 * this.
4877 *
4878 * To make these devices work, the internal SSP
4879 * enabled flag needs to be cleared if the remote host
4880 * features do not indicate SSP support */
4881 clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4882 }
4883
4884 if (ev->features[0] & LMP_HOST_SC)
4885 set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
4886 }
4887
4888 if (conn->state != BT_CONFIG)
4889 goto unlock;
4890
4891 if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
4892 struct hci_cp_remote_name_req cp;
4893 memset(&cp, 0, sizeof(cp));
4894 bacpy(&cp.bdaddr, &conn->dst);
4895 cp.pscan_rep_mode = 0x02;
4896 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
4897 } else {
4898 mgmt_device_connected(hdev, conn, NULL, 0);
4899 }
4900
4901 if (!hci_outgoing_auth_needed(hdev, conn)) {
4902 conn->state = BT_CONNECTED;
4903 hci_connect_cfm(conn, ev->status);
4904 hci_conn_drop(conn);
4905 }
4906
4907 unlock:
4908 hci_dev_unlock(hdev);
4909 }
4910
hci_sync_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4911 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
4912 struct sk_buff *skb)
4913 {
4914 struct hci_ev_sync_conn_complete *ev = data;
4915 struct hci_conn *conn;
4916 u8 status = ev->status;
4917
4918 switch (ev->link_type) {
4919 case SCO_LINK:
4920 case ESCO_LINK:
4921 break;
4922 default:
4923 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
4924 * for HCI_Synchronous_Connection_Complete is limited to
4925 * either SCO or eSCO
4926 */
4927 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
4928 return;
4929 }
4930
4931 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4932
4933 hci_dev_lock(hdev);
4934
4935 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
4936 if (!conn) {
4937 if (ev->link_type == ESCO_LINK)
4938 goto unlock;
4939
4940 /* When the link type in the event indicates SCO connection
4941 * and lookup of the connection object fails, then check
4942 * if an eSCO connection object exists.
4943 *
4944 * The core limits the synchronous connections to either
4945 * SCO or eSCO. The eSCO connection is preferred and tried
4946 * to be setup first and until successfully established,
4947 * the link type will be hinted as eSCO.
4948 */
4949 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
4950 if (!conn)
4951 goto unlock;
4952 }
4953
4954 /* The HCI_Synchronous_Connection_Complete event is only sent once per connection.
4955 * Processing it more than once per connection can corrupt kernel memory.
4956 *
4957 * As the connection handle is set here for the first time, it indicates
4958 * whether the connection is already set up.
4959 */
4960 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
4961 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection");
4962 goto unlock;
4963 }
4964
4965 switch (status) {
4966 case 0x00:
4967 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
4968 if (status) {
4969 conn->state = BT_CLOSED;
4970 break;
4971 }
4972
4973 conn->state = BT_CONNECTED;
4974 conn->type = ev->link_type;
4975
4976 hci_debugfs_create_conn(conn);
4977 hci_conn_add_sysfs(conn);
4978 break;
4979
4980 case 0x10: /* Connection Accept Timeout */
4981 case 0x0d: /* Connection Rejected due to Limited Resources */
4982 case 0x11: /* Unsupported Feature or Parameter Value */
4983 case 0x1c: /* SCO interval rejected */
4984 case 0x1a: /* Unsupported Remote Feature */
4985 case 0x1e: /* Invalid LMP Parameters */
4986 case 0x1f: /* Unspecified error */
4987 case 0x20: /* Unsupported LMP Parameter value */
4988 if (conn->out) {
4989 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
4990 (hdev->esco_type & EDR_ESCO_MASK);
4991 if (hci_setup_sync(conn, conn->parent->handle))
4992 goto unlock;
4993 }
4994 fallthrough;
4995
4996 default:
4997 conn->state = BT_CLOSED;
4998 break;
4999 }
5000
5001 bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode);
5002 /* Notify only in case of SCO over HCI transport data path which
5003 * is zero and non-zero value shall be non-HCI transport data path
5004 */
5005 if (conn->codec.data_path == 0 && hdev->notify) {
5006 switch (ev->air_mode) {
5007 case 0x02:
5008 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
5009 break;
5010 case 0x03:
5011 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP);
5012 break;
5013 }
5014 }
5015
5016 hci_connect_cfm(conn, status);
5017 if (status)
5018 hci_conn_del(conn);
5019
5020 unlock:
5021 hci_dev_unlock(hdev);
5022 }
5023
eir_get_length(u8 * eir,size_t eir_len)5024 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
5025 {
5026 size_t parsed = 0;
5027
5028 while (parsed < eir_len) {
5029 u8 field_len = eir[0];
5030
5031 if (field_len == 0)
5032 return parsed;
5033
5034 parsed += field_len + 1;
5035 eir += field_len + 1;
5036 }
5037
5038 return eir_len;
5039 }
5040
hci_extended_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5041 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata,
5042 struct sk_buff *skb)
5043 {
5044 struct hci_ev_ext_inquiry_result *ev = edata;
5045 struct inquiry_data data;
5046 size_t eir_len;
5047 int i;
5048
5049 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT,
5050 flex_array_size(ev, info, ev->num)))
5051 return;
5052
5053 bt_dev_dbg(hdev, "num %d", ev->num);
5054
5055 if (!ev->num)
5056 return;
5057
5058 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
5059 return;
5060
5061 hci_dev_lock(hdev);
5062
5063 for (i = 0; i < ev->num; i++) {
5064 struct extended_inquiry_info *info = &ev->info[i];
5065 u32 flags;
5066 bool name_known;
5067
5068 bacpy(&data.bdaddr, &info->bdaddr);
5069 data.pscan_rep_mode = info->pscan_rep_mode;
5070 data.pscan_period_mode = info->pscan_period_mode;
5071 data.pscan_mode = 0x00;
5072 memcpy(data.dev_class, info->dev_class, 3);
5073 data.clock_offset = info->clock_offset;
5074 data.rssi = info->rssi;
5075 data.ssp_mode = 0x01;
5076
5077 if (hci_dev_test_flag(hdev, HCI_MGMT))
5078 name_known = eir_get_data(info->data,
5079 sizeof(info->data),
5080 EIR_NAME_COMPLETE, NULL);
5081 else
5082 name_known = true;
5083
5084 flags = hci_inquiry_cache_update(hdev, &data, name_known);
5085
5086 eir_len = eir_get_length(info->data, sizeof(info->data));
5087
5088 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
5089 info->dev_class, info->rssi,
5090 flags, info->data, eir_len, NULL, 0, 0);
5091 }
5092
5093 hci_dev_unlock(hdev);
5094 }
5095
hci_key_refresh_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5096 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data,
5097 struct sk_buff *skb)
5098 {
5099 struct hci_ev_key_refresh_complete *ev = data;
5100 struct hci_conn *conn;
5101
5102 bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status,
5103 __le16_to_cpu(ev->handle));
5104
5105 hci_dev_lock(hdev);
5106
5107 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5108 if (!conn)
5109 goto unlock;
5110
5111 /* For BR/EDR the necessary steps are taken through the
5112 * auth_complete event.
5113 */
5114 if (conn->type != LE_LINK)
5115 goto unlock;
5116
5117 if (!ev->status)
5118 conn->sec_level = conn->pending_sec_level;
5119
5120 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
5121
5122 if (ev->status && conn->state == BT_CONNECTED) {
5123 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
5124 hci_conn_drop(conn);
5125 goto unlock;
5126 }
5127
5128 if (conn->state == BT_CONFIG) {
5129 if (!ev->status)
5130 conn->state = BT_CONNECTED;
5131
5132 hci_connect_cfm(conn, ev->status);
5133 hci_conn_drop(conn);
5134 } else {
5135 hci_auth_cfm(conn, ev->status);
5136
5137 hci_conn_hold(conn);
5138 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
5139 hci_conn_drop(conn);
5140 }
5141
5142 unlock:
5143 hci_dev_unlock(hdev);
5144 }
5145
hci_get_auth_req(struct hci_conn * conn)5146 static u8 hci_get_auth_req(struct hci_conn *conn)
5147 {
5148 /* If remote requests no-bonding follow that lead */
5149 if (conn->remote_auth == HCI_AT_NO_BONDING ||
5150 conn->remote_auth == HCI_AT_NO_BONDING_MITM)
5151 return conn->remote_auth | (conn->auth_type & 0x01);
5152
5153 /* If both remote and local have enough IO capabilities, require
5154 * MITM protection
5155 */
5156 if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
5157 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
5158 return conn->remote_auth | 0x01;
5159
5160 /* No MITM protection possible so ignore remote requirement */
5161 return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
5162 }
5163
bredr_oob_data_present(struct hci_conn * conn)5164 static u8 bredr_oob_data_present(struct hci_conn *conn)
5165 {
5166 struct hci_dev *hdev = conn->hdev;
5167 struct oob_data *data;
5168
5169 data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
5170 if (!data)
5171 return 0x00;
5172
5173 if (bredr_sc_enabled(hdev)) {
5174 /* When Secure Connections is enabled, then just
5175 * return the present value stored with the OOB
5176 * data. The stored value contains the right present
5177 * information. However it can only be trusted when
5178 * not in Secure Connection Only mode.
5179 */
5180 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
5181 return data->present;
5182
5183 /* When Secure Connections Only mode is enabled, then
5184 * the P-256 values are required. If they are not
5185 * available, then do not declare that OOB data is
5186 * present.
5187 */
5188 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
5189 !crypto_memneq(data->hash256, ZERO_KEY, 16))
5190 return 0x00;
5191
5192 return 0x02;
5193 }
5194
5195 /* When Secure Connections is not enabled or actually
5196 * not supported by the hardware, then check that if
5197 * P-192 data values are present.
5198 */
5199 if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
5200 !crypto_memneq(data->hash192, ZERO_KEY, 16))
5201 return 0x00;
5202
5203 return 0x01;
5204 }
5205
hci_io_capa_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5206 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data,
5207 struct sk_buff *skb)
5208 {
5209 struct hci_ev_io_capa_request *ev = data;
5210 struct hci_conn *conn;
5211
5212 bt_dev_dbg(hdev, "");
5213
5214 hci_dev_lock(hdev);
5215
5216 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5217 if (!conn || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
5218 goto unlock;
5219
5220 /* Assume remote supports SSP since it has triggered this event */
5221 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
5222
5223 hci_conn_hold(conn);
5224
5225 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5226 goto unlock;
5227
5228 /* Allow pairing if we're pairable, the initiators of the
5229 * pairing or if the remote is not requesting bonding.
5230 */
5231 if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
5232 test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
5233 (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
5234 struct hci_cp_io_capability_reply cp;
5235
5236 bacpy(&cp.bdaddr, &ev->bdaddr);
5237 /* Change the IO capability from KeyboardDisplay
5238 * to DisplayYesNo as it is not supported by BT spec. */
5239 cp.capability = (conn->io_capability == 0x04) ?
5240 HCI_IO_DISPLAY_YESNO : conn->io_capability;
5241
5242 /* If we are initiators, there is no remote information yet */
5243 if (conn->remote_auth == 0xff) {
5244 /* Request MITM protection if our IO caps allow it
5245 * except for the no-bonding case.
5246 */
5247 if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5248 conn->auth_type != HCI_AT_NO_BONDING)
5249 conn->auth_type |= 0x01;
5250 } else {
5251 conn->auth_type = hci_get_auth_req(conn);
5252 }
5253
5254 /* If we're not bondable, force one of the non-bondable
5255 * authentication requirement values.
5256 */
5257 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
5258 conn->auth_type &= HCI_AT_NO_BONDING_MITM;
5259
5260 cp.authentication = conn->auth_type;
5261 cp.oob_data = bredr_oob_data_present(conn);
5262
5263 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
5264 sizeof(cp), &cp);
5265 } else {
5266 struct hci_cp_io_capability_neg_reply cp;
5267
5268 bacpy(&cp.bdaddr, &ev->bdaddr);
5269 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
5270
5271 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
5272 sizeof(cp), &cp);
5273 }
5274
5275 unlock:
5276 hci_dev_unlock(hdev);
5277 }
5278
hci_io_capa_reply_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5279 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data,
5280 struct sk_buff *skb)
5281 {
5282 struct hci_ev_io_capa_reply *ev = data;
5283 struct hci_conn *conn;
5284
5285 bt_dev_dbg(hdev, "");
5286
5287 hci_dev_lock(hdev);
5288
5289 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5290 if (!conn)
5291 goto unlock;
5292
5293 conn->remote_cap = ev->capability;
5294 conn->remote_auth = ev->authentication;
5295
5296 unlock:
5297 hci_dev_unlock(hdev);
5298 }
5299
hci_user_confirm_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5300 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data,
5301 struct sk_buff *skb)
5302 {
5303 struct hci_ev_user_confirm_req *ev = data;
5304 int loc_mitm, rem_mitm, confirm_hint = 0;
5305 struct hci_conn *conn;
5306
5307 bt_dev_dbg(hdev, "");
5308
5309 hci_dev_lock(hdev);
5310
5311 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5312 goto unlock;
5313
5314 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5315 if (!conn)
5316 goto unlock;
5317
5318 loc_mitm = (conn->auth_type & 0x01);
5319 rem_mitm = (conn->remote_auth & 0x01);
5320
5321 /* If we require MITM but the remote device can't provide that
5322 * (it has NoInputNoOutput) then reject the confirmation
5323 * request. We check the security level here since it doesn't
5324 * necessarily match conn->auth_type.
5325 */
5326 if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
5327 conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
5328 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM");
5329 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
5330 sizeof(ev->bdaddr), &ev->bdaddr);
5331 goto unlock;
5332 }
5333
5334 /* If no side requires MITM protection; use JUST_CFM method */
5335 if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
5336 (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
5337
5338 /* If we're not the initiator of request authorization and the
5339 * local IO capability is not NoInputNoOutput, use JUST_WORKS
5340 * method (mgmt_user_confirm with confirm_hint set to 1).
5341 */
5342 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5343 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) {
5344 bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5345 confirm_hint = 1;
5346 goto confirm;
5347 }
5348
5349 /* If there already exists link key in local host, leave the
5350 * decision to user space since the remote device could be
5351 * legitimate or malicious.
5352 */
5353 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5354 bt_dev_dbg(hdev, "Local host already has link key");
5355 confirm_hint = 1;
5356 goto confirm;
5357 }
5358
5359 BT_DBG("Auto-accept of user confirmation with %ums delay",
5360 hdev->auto_accept_delay);
5361
5362 if (hdev->auto_accept_delay > 0) {
5363 int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5364 queue_delayed_work(conn->hdev->workqueue,
5365 &conn->auto_accept_work, delay);
5366 goto unlock;
5367 }
5368
5369 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5370 sizeof(ev->bdaddr), &ev->bdaddr);
5371 goto unlock;
5372 }
5373
5374 confirm:
5375 mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5376 le32_to_cpu(ev->passkey), confirm_hint);
5377
5378 unlock:
5379 hci_dev_unlock(hdev);
5380 }
5381
hci_user_passkey_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5382 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5383 struct sk_buff *skb)
5384 {
5385 struct hci_ev_user_passkey_req *ev = data;
5386
5387 bt_dev_dbg(hdev, "");
5388
5389 if (hci_dev_test_flag(hdev, HCI_MGMT))
5390 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5391 }
5392
hci_user_passkey_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5393 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5394 struct sk_buff *skb)
5395 {
5396 struct hci_ev_user_passkey_notify *ev = data;
5397 struct hci_conn *conn;
5398
5399 bt_dev_dbg(hdev, "");
5400
5401 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5402 if (!conn)
5403 return;
5404
5405 conn->passkey_notify = __le32_to_cpu(ev->passkey);
5406 conn->passkey_entered = 0;
5407
5408 if (hci_dev_test_flag(hdev, HCI_MGMT))
5409 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5410 conn->dst_type, conn->passkey_notify,
5411 conn->passkey_entered);
5412 }
5413
hci_keypress_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5414 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5415 struct sk_buff *skb)
5416 {
5417 struct hci_ev_keypress_notify *ev = data;
5418 struct hci_conn *conn;
5419
5420 bt_dev_dbg(hdev, "");
5421
5422 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5423 if (!conn)
5424 return;
5425
5426 switch (ev->type) {
5427 case HCI_KEYPRESS_STARTED:
5428 conn->passkey_entered = 0;
5429 return;
5430
5431 case HCI_KEYPRESS_ENTERED:
5432 conn->passkey_entered++;
5433 break;
5434
5435 case HCI_KEYPRESS_ERASED:
5436 conn->passkey_entered--;
5437 break;
5438
5439 case HCI_KEYPRESS_CLEARED:
5440 conn->passkey_entered = 0;
5441 break;
5442
5443 case HCI_KEYPRESS_COMPLETED:
5444 return;
5445 }
5446
5447 if (hci_dev_test_flag(hdev, HCI_MGMT))
5448 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5449 conn->dst_type, conn->passkey_notify,
5450 conn->passkey_entered);
5451 }
5452
hci_simple_pair_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5453 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5454 struct sk_buff *skb)
5455 {
5456 struct hci_ev_simple_pair_complete *ev = data;
5457 struct hci_conn *conn;
5458
5459 bt_dev_dbg(hdev, "");
5460
5461 hci_dev_lock(hdev);
5462
5463 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5464 if (!conn || !hci_conn_ssp_enabled(conn))
5465 goto unlock;
5466
5467 /* Reset the authentication requirement to unknown */
5468 conn->remote_auth = 0xff;
5469
5470 /* To avoid duplicate auth_failed events to user space we check
5471 * the HCI_CONN_AUTH_PEND flag which will be set if we
5472 * initiated the authentication. A traditional auth_complete
5473 * event gets always produced as initiator and is also mapped to
5474 * the mgmt_auth_failed event */
5475 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5476 mgmt_auth_failed(conn, ev->status);
5477
5478 hci_conn_drop(conn);
5479
5480 unlock:
5481 hci_dev_unlock(hdev);
5482 }
5483
hci_remote_host_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5484 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5485 struct sk_buff *skb)
5486 {
5487 struct hci_ev_remote_host_features *ev = data;
5488 struct inquiry_entry *ie;
5489 struct hci_conn *conn;
5490
5491 bt_dev_dbg(hdev, "");
5492
5493 hci_dev_lock(hdev);
5494
5495 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5496 if (conn)
5497 memcpy(conn->features[1], ev->features, 8);
5498
5499 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5500 if (ie)
5501 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5502
5503 hci_dev_unlock(hdev);
5504 }
5505
hci_remote_oob_data_request_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5506 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5507 struct sk_buff *skb)
5508 {
5509 struct hci_ev_remote_oob_data_request *ev = edata;
5510 struct oob_data *data;
5511
5512 bt_dev_dbg(hdev, "");
5513
5514 hci_dev_lock(hdev);
5515
5516 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5517 goto unlock;
5518
5519 data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5520 if (!data) {
5521 struct hci_cp_remote_oob_data_neg_reply cp;
5522
5523 bacpy(&cp.bdaddr, &ev->bdaddr);
5524 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5525 sizeof(cp), &cp);
5526 goto unlock;
5527 }
5528
5529 if (bredr_sc_enabled(hdev)) {
5530 struct hci_cp_remote_oob_ext_data_reply cp;
5531
5532 bacpy(&cp.bdaddr, &ev->bdaddr);
5533 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5534 memset(cp.hash192, 0, sizeof(cp.hash192));
5535 memset(cp.rand192, 0, sizeof(cp.rand192));
5536 } else {
5537 memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5538 memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5539 }
5540 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5541 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5542
5543 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5544 sizeof(cp), &cp);
5545 } else {
5546 struct hci_cp_remote_oob_data_reply cp;
5547
5548 bacpy(&cp.bdaddr, &ev->bdaddr);
5549 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5550 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5551
5552 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5553 sizeof(cp), &cp);
5554 }
5555
5556 unlock:
5557 hci_dev_unlock(hdev);
5558 }
5559
le_conn_update_addr(struct hci_conn * conn,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * local_rpa)5560 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5561 u8 bdaddr_type, bdaddr_t *local_rpa)
5562 {
5563 if (conn->out) {
5564 conn->dst_type = bdaddr_type;
5565 conn->resp_addr_type = bdaddr_type;
5566 bacpy(&conn->resp_addr, bdaddr);
5567
5568 /* Check if the controller has set a Local RPA then it must be
5569 * used instead or hdev->rpa.
5570 */
5571 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5572 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5573 bacpy(&conn->init_addr, local_rpa);
5574 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5575 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5576 bacpy(&conn->init_addr, &conn->hdev->rpa);
5577 } else {
5578 hci_copy_identity_address(conn->hdev, &conn->init_addr,
5579 &conn->init_addr_type);
5580 }
5581 } else {
5582 conn->resp_addr_type = conn->hdev->adv_addr_type;
5583 /* Check if the controller has set a Local RPA then it must be
5584 * used instead or hdev->rpa.
5585 */
5586 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5587 conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5588 bacpy(&conn->resp_addr, local_rpa);
5589 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5590 /* In case of ext adv, resp_addr will be updated in
5591 * Adv Terminated event.
5592 */
5593 if (!ext_adv_capable(conn->hdev))
5594 bacpy(&conn->resp_addr,
5595 &conn->hdev->random_addr);
5596 } else {
5597 bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5598 }
5599
5600 conn->init_addr_type = bdaddr_type;
5601 bacpy(&conn->init_addr, bdaddr);
5602
5603 /* For incoming connections, set the default minimum
5604 * and maximum connection interval. They will be used
5605 * to check if the parameters are in range and if not
5606 * trigger the connection update procedure.
5607 */
5608 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5609 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5610 }
5611 }
5612
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)5613 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5614 bdaddr_t *bdaddr, u8 bdaddr_type,
5615 bdaddr_t *local_rpa, u8 role, u16 handle,
5616 u16 interval, u16 latency,
5617 u16 supervision_timeout)
5618 {
5619 struct hci_conn_params *params;
5620 struct hci_conn *conn;
5621 struct smp_irk *irk;
5622 u8 addr_type;
5623
5624 hci_dev_lock(hdev);
5625
5626 /* All controllers implicitly stop advertising in the event of a
5627 * connection, so ensure that the state bit is cleared.
5628 */
5629 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5630
5631 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
5632 if (!conn) {
5633 /* In case of error status and there is no connection pending
5634 * just unlock as there is nothing to cleanup.
5635 */
5636 if (status)
5637 goto unlock;
5638
5639 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
5640 if (IS_ERR(conn)) {
5641 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
5642 goto unlock;
5643 }
5644
5645 conn->dst_type = bdaddr_type;
5646
5647 /* If we didn't have a hci_conn object previously
5648 * but we're in central role this must be something
5649 * initiated using an accept list. Since accept list based
5650 * connections are not "first class citizens" we don't
5651 * have full tracking of them. Therefore, we go ahead
5652 * with a "best effort" approach of determining the
5653 * initiator address based on the HCI_PRIVACY flag.
5654 */
5655 if (conn->out) {
5656 conn->resp_addr_type = bdaddr_type;
5657 bacpy(&conn->resp_addr, bdaddr);
5658 if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5659 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5660 bacpy(&conn->init_addr, &hdev->rpa);
5661 } else {
5662 hci_copy_identity_address(hdev,
5663 &conn->init_addr,
5664 &conn->init_addr_type);
5665 }
5666 }
5667 } else {
5668 cancel_delayed_work(&conn->le_conn_timeout);
5669 }
5670
5671 /* The HCI_LE_Connection_Complete event is only sent once per connection.
5672 * Processing it more than once per connection can corrupt kernel memory.
5673 *
5674 * As the connection handle is set here for the first time, it indicates
5675 * whether the connection is already set up.
5676 */
5677 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5678 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5679 goto unlock;
5680 }
5681
5682 le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5683
5684 /* Lookup the identity address from the stored connection
5685 * address and address type.
5686 *
5687 * When establishing connections to an identity address, the
5688 * connection procedure will store the resolvable random
5689 * address first. Now if it can be converted back into the
5690 * identity address, start using the identity address from
5691 * now on.
5692 */
5693 irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5694 if (irk) {
5695 bacpy(&conn->dst, &irk->bdaddr);
5696 conn->dst_type = irk->addr_type;
5697 }
5698
5699 conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5700
5701 /* All connection failure handling is taken care of by the
5702 * hci_conn_failed function which is triggered by the HCI
5703 * request completion callbacks used for connecting.
5704 */
5705 if (status || hci_conn_set_handle(conn, handle))
5706 goto unlock;
5707
5708 /* Drop the connection if it has been aborted */
5709 if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5710 hci_conn_drop(conn);
5711 goto unlock;
5712 }
5713
5714 if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5715 addr_type = BDADDR_LE_PUBLIC;
5716 else
5717 addr_type = BDADDR_LE_RANDOM;
5718
5719 /* Drop the connection if the device is blocked */
5720 if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5721 hci_conn_drop(conn);
5722 goto unlock;
5723 }
5724
5725 mgmt_device_connected(hdev, conn, NULL, 0);
5726
5727 conn->sec_level = BT_SECURITY_LOW;
5728 conn->state = BT_CONFIG;
5729
5730 /* Store current advertising instance as connection advertising instance
5731 * when sotfware rotation is in use so it can be re-enabled when
5732 * disconnected.
5733 */
5734 if (!ext_adv_capable(hdev))
5735 conn->adv_instance = hdev->cur_adv_instance;
5736
5737 conn->le_conn_interval = interval;
5738 conn->le_conn_latency = latency;
5739 conn->le_supv_timeout = supervision_timeout;
5740
5741 hci_debugfs_create_conn(conn);
5742 hci_conn_add_sysfs(conn);
5743
5744 /* The remote features procedure is defined for central
5745 * role only. So only in case of an initiated connection
5746 * request the remote features.
5747 *
5748 * If the local controller supports peripheral-initiated features
5749 * exchange, then requesting the remote features in peripheral
5750 * role is possible. Otherwise just transition into the
5751 * connected state without requesting the remote features.
5752 */
5753 if (conn->out ||
5754 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
5755 struct hci_cp_le_read_remote_features cp;
5756
5757 cp.handle = __cpu_to_le16(conn->handle);
5758
5759 hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
5760 sizeof(cp), &cp);
5761
5762 hci_conn_hold(conn);
5763 } else {
5764 conn->state = BT_CONNECTED;
5765 hci_connect_cfm(conn, status);
5766 }
5767
5768 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
5769 conn->dst_type);
5770 if (params) {
5771 hci_pend_le_list_del_init(params);
5772 if (params->conn) {
5773 hci_conn_drop(params->conn);
5774 hci_conn_put(params->conn);
5775 params->conn = NULL;
5776 }
5777 }
5778
5779 unlock:
5780 hci_update_passive_scan(hdev);
5781 hci_dev_unlock(hdev);
5782 }
5783
hci_le_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5784 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
5785 struct sk_buff *skb)
5786 {
5787 struct hci_ev_le_conn_complete *ev = data;
5788
5789 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5790
5791 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5792 NULL, ev->role, le16_to_cpu(ev->handle),
5793 le16_to_cpu(ev->interval),
5794 le16_to_cpu(ev->latency),
5795 le16_to_cpu(ev->supervision_timeout));
5796 }
5797
hci_le_enh_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5798 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
5799 struct sk_buff *skb)
5800 {
5801 struct hci_ev_le_enh_conn_complete *ev = data;
5802
5803 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5804
5805 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5806 &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
5807 le16_to_cpu(ev->interval),
5808 le16_to_cpu(ev->latency),
5809 le16_to_cpu(ev->supervision_timeout));
5810 }
5811
hci_le_ext_adv_term_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5812 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
5813 struct sk_buff *skb)
5814 {
5815 struct hci_evt_le_ext_adv_set_term *ev = data;
5816 struct hci_conn *conn;
5817 struct adv_info *adv, *n;
5818
5819 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5820
5821 /* The Bluetooth Core 5.3 specification clearly states that this event
5822 * shall not be sent when the Host disables the advertising set. So in
5823 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
5824 *
5825 * When the Host disables an advertising set, all cleanup is done via
5826 * its command callback and not needed to be duplicated here.
5827 */
5828 if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
5829 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
5830 return;
5831 }
5832
5833 hci_dev_lock(hdev);
5834
5835 adv = hci_find_adv_instance(hdev, ev->handle);
5836
5837 if (ev->status) {
5838 if (!adv)
5839 goto unlock;
5840
5841 /* Remove advertising as it has been terminated */
5842 hci_remove_adv_instance(hdev, ev->handle);
5843 mgmt_advertising_removed(NULL, hdev, ev->handle);
5844
5845 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
5846 if (adv->enabled)
5847 goto unlock;
5848 }
5849
5850 /* We are no longer advertising, clear HCI_LE_ADV */
5851 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5852 goto unlock;
5853 }
5854
5855 if (adv)
5856 adv->enabled = false;
5857
5858 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
5859 if (conn) {
5860 /* Store handle in the connection so the correct advertising
5861 * instance can be re-enabled when disconnected.
5862 */
5863 conn->adv_instance = ev->handle;
5864
5865 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
5866 bacmp(&conn->resp_addr, BDADDR_ANY))
5867 goto unlock;
5868
5869 if (!ev->handle) {
5870 bacpy(&conn->resp_addr, &hdev->random_addr);
5871 goto unlock;
5872 }
5873
5874 if (adv)
5875 bacpy(&conn->resp_addr, &adv->random_addr);
5876 }
5877
5878 unlock:
5879 hci_dev_unlock(hdev);
5880 }
5881
hci_le_conn_update_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5882 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
5883 struct sk_buff *skb)
5884 {
5885 struct hci_ev_le_conn_update_complete *ev = data;
5886 struct hci_conn *conn;
5887
5888 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5889
5890 if (ev->status)
5891 return;
5892
5893 hci_dev_lock(hdev);
5894
5895 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5896 if (conn) {
5897 conn->le_conn_interval = le16_to_cpu(ev->interval);
5898 conn->le_conn_latency = le16_to_cpu(ev->latency);
5899 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
5900 }
5901
5902 hci_dev_unlock(hdev);
5903 }
5904
5905 /* 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)5906 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
5907 bdaddr_t *addr,
5908 u8 addr_type, bool addr_resolved,
5909 u8 adv_type)
5910 {
5911 struct hci_conn *conn;
5912 struct hci_conn_params *params;
5913
5914 /* If the event is not connectable don't proceed further */
5915 if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
5916 return NULL;
5917
5918 /* Ignore if the device is blocked or hdev is suspended */
5919 if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
5920 hdev->suspended)
5921 return NULL;
5922
5923 /* Most controller will fail if we try to create new connections
5924 * while we have an existing one in peripheral role.
5925 */
5926 if (hdev->conn_hash.le_num_peripheral > 0 &&
5927 (!test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) ||
5928 !(hdev->le_states[3] & 0x10)))
5929 return NULL;
5930
5931 /* If we're not connectable only connect devices that we have in
5932 * our pend_le_conns list.
5933 */
5934 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
5935 addr_type);
5936 if (!params)
5937 return NULL;
5938
5939 if (!params->explicit_connect) {
5940 switch (params->auto_connect) {
5941 case HCI_AUTO_CONN_DIRECT:
5942 /* Only devices advertising with ADV_DIRECT_IND are
5943 * triggering a connection attempt. This is allowing
5944 * incoming connections from peripheral devices.
5945 */
5946 if (adv_type != LE_ADV_DIRECT_IND)
5947 return NULL;
5948 break;
5949 case HCI_AUTO_CONN_ALWAYS:
5950 /* Devices advertising with ADV_IND or ADV_DIRECT_IND
5951 * are triggering a connection attempt. This means
5952 * that incoming connections from peripheral device are
5953 * accepted and also outgoing connections to peripheral
5954 * devices are established when found.
5955 */
5956 break;
5957 default:
5958 return NULL;
5959 }
5960 }
5961
5962 conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
5963 BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
5964 HCI_ROLE_MASTER);
5965 if (!IS_ERR(conn)) {
5966 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
5967 * by higher layer that tried to connect, if no then
5968 * store the pointer since we don't really have any
5969 * other owner of the object besides the params that
5970 * triggered it. This way we can abort the connection if
5971 * the parameters get removed and keep the reference
5972 * count consistent once the connection is established.
5973 */
5974
5975 if (!params->explicit_connect)
5976 params->conn = hci_conn_get(conn);
5977
5978 return conn;
5979 }
5980
5981 switch (PTR_ERR(conn)) {
5982 case -EBUSY:
5983 /* If hci_connect() returns -EBUSY it means there is already
5984 * an LE connection attempt going on. Since controllers don't
5985 * support more than one connection attempt at the time, we
5986 * don't consider this an error case.
5987 */
5988 break;
5989 default:
5990 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
5991 return NULL;
5992 }
5993
5994 return NULL;
5995 }
5996
process_adv_report(struct hci_dev * hdev,u8 type,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * direct_addr,u8 direct_addr_type,s8 rssi,u8 * data,u8 len,bool ext_adv,bool ctl_time,u64 instant)5997 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
5998 u8 bdaddr_type, bdaddr_t *direct_addr,
5999 u8 direct_addr_type, s8 rssi, u8 *data, u8 len,
6000 bool ext_adv, bool ctl_time, u64 instant)
6001 {
6002 struct discovery_state *d = &hdev->discovery;
6003 struct smp_irk *irk;
6004 struct hci_conn *conn;
6005 bool match, bdaddr_resolved;
6006 u32 flags;
6007 u8 *ptr;
6008
6009 switch (type) {
6010 case LE_ADV_IND:
6011 case LE_ADV_DIRECT_IND:
6012 case LE_ADV_SCAN_IND:
6013 case LE_ADV_NONCONN_IND:
6014 case LE_ADV_SCAN_RSP:
6015 break;
6016 default:
6017 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6018 "type: 0x%02x", type);
6019 return;
6020 }
6021
6022 if (len > max_adv_len(hdev)) {
6023 bt_dev_err_ratelimited(hdev,
6024 "adv larger than maximum supported");
6025 return;
6026 }
6027
6028 /* Find the end of the data in case the report contains padded zero
6029 * bytes at the end causing an invalid length value.
6030 *
6031 * When data is NULL, len is 0 so there is no need for extra ptr
6032 * check as 'ptr < data + 0' is already false in such case.
6033 */
6034 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6035 if (ptr + 1 + *ptr > data + len)
6036 break;
6037 }
6038
6039 /* Adjust for actual length. This handles the case when remote
6040 * device is advertising with incorrect data length.
6041 */
6042 len = ptr - data;
6043
6044 /* If the direct address is present, then this report is from
6045 * a LE Direct Advertising Report event. In that case it is
6046 * important to see if the address is matching the local
6047 * controller address.
6048 */
6049 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr) {
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 controller is not using resolvable random
6060 * addresses, then this report can be ignored.
6061 */
6062 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
6063 return;
6064
6065 /* If the local IRK of the controller does not match
6066 * with the resolvable random address provided, then
6067 * this report can be ignored.
6068 */
6069 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6070 return;
6071 }
6072
6073 /* Check if we need to convert to identity address */
6074 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6075 if (irk) {
6076 bdaddr = &irk->bdaddr;
6077 bdaddr_type = irk->addr_type;
6078 }
6079
6080 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6081
6082 /* Check if we have been requested to connect to this device.
6083 *
6084 * direct_addr is set only for directed advertising reports (it is NULL
6085 * for advertising reports) and is already verified to be RPA above.
6086 */
6087 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6088 type);
6089 if (!ext_adv && conn && type == LE_ADV_IND &&
6090 len <= max_adv_len(hdev)) {
6091 /* Store report for later inclusion by
6092 * mgmt_device_connected
6093 */
6094 memcpy(conn->le_adv_data, data, len);
6095 conn->le_adv_data_len = len;
6096 }
6097
6098 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6099 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6100 else
6101 flags = 0;
6102
6103 /* All scan results should be sent up for Mesh systems */
6104 if (hci_dev_test_flag(hdev, HCI_MESH)) {
6105 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6106 rssi, flags, data, len, NULL, 0, instant);
6107 return;
6108 }
6109
6110 /* Passive scanning shouldn't trigger any device found events,
6111 * except for devices marked as CONN_REPORT for which we do send
6112 * device found events, or advertisement monitoring requested.
6113 */
6114 if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6115 if (type == LE_ADV_DIRECT_IND)
6116 return;
6117
6118 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6119 bdaddr, bdaddr_type) &&
6120 idr_is_empty(&hdev->adv_monitors_idr))
6121 return;
6122
6123 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6124 rssi, flags, data, len, NULL, 0, 0);
6125 return;
6126 }
6127
6128 /* When receiving a scan response, then there is no way to
6129 * know if the remote device is connectable or not. However
6130 * since scan responses are merged with a previously seen
6131 * advertising report, the flags field from that report
6132 * will be used.
6133 *
6134 * In the unlikely case that a controller just sends a scan
6135 * response event that doesn't match the pending report, then
6136 * it is marked as a standalone SCAN_RSP.
6137 */
6138 if (type == LE_ADV_SCAN_RSP)
6139 flags = MGMT_DEV_FOUND_SCAN_RSP;
6140
6141 /* If there's nothing pending either store the data from this
6142 * event or send an immediate device found event if the data
6143 * should not be stored for later.
6144 */
6145 if (!ext_adv && !has_pending_adv_report(hdev)) {
6146 /* If the report will trigger a SCAN_REQ store it for
6147 * later merging.
6148 */
6149 if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) {
6150 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6151 rssi, flags, data, len);
6152 return;
6153 }
6154
6155 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6156 rssi, flags, data, len, NULL, 0, 0);
6157 return;
6158 }
6159
6160 /* Check if the pending report is for the same device as the new one */
6161 match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6162 bdaddr_type == d->last_adv_addr_type);
6163
6164 /* If the pending data doesn't match this report or this isn't a
6165 * scan response (e.g. we got a duplicate ADV_IND) then force
6166 * sending of the pending data.
6167 */
6168 if (type != LE_ADV_SCAN_RSP || !match) {
6169 /* Send out whatever is in the cache, but skip duplicates */
6170 if (!match)
6171 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6172 d->last_adv_addr_type, NULL,
6173 d->last_adv_rssi, d->last_adv_flags,
6174 d->last_adv_data,
6175 d->last_adv_data_len, NULL, 0, 0);
6176
6177 /* If the new report will trigger a SCAN_REQ store it for
6178 * later merging.
6179 */
6180 if (!ext_adv && (type == LE_ADV_IND ||
6181 type == LE_ADV_SCAN_IND)) {
6182 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6183 rssi, flags, data, len);
6184 return;
6185 }
6186
6187 /* The advertising reports cannot be merged, so clear
6188 * the pending report and send out a device found event.
6189 */
6190 clear_pending_adv_report(hdev);
6191 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6192 rssi, flags, data, len, NULL, 0, 0);
6193 return;
6194 }
6195
6196 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6197 * the new event is a SCAN_RSP. We can therefore proceed with
6198 * sending a merged device found event.
6199 */
6200 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6201 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6202 d->last_adv_data, d->last_adv_data_len, data, len, 0);
6203 clear_pending_adv_report(hdev);
6204 }
6205
hci_le_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6206 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6207 struct sk_buff *skb)
6208 {
6209 struct hci_ev_le_advertising_report *ev = data;
6210 u64 instant = jiffies;
6211
6212 if (!ev->num)
6213 return;
6214
6215 hci_dev_lock(hdev);
6216
6217 while (ev->num--) {
6218 struct hci_ev_le_advertising_info *info;
6219 s8 rssi;
6220
6221 info = hci_le_ev_skb_pull(hdev, skb,
6222 HCI_EV_LE_ADVERTISING_REPORT,
6223 sizeof(*info));
6224 if (!info)
6225 break;
6226
6227 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6228 info->length + 1))
6229 break;
6230
6231 if (info->length <= max_adv_len(hdev)) {
6232 rssi = info->data[info->length];
6233 process_adv_report(hdev, info->type, &info->bdaddr,
6234 info->bdaddr_type, NULL, 0, rssi,
6235 info->data, info->length, false,
6236 false, instant);
6237 } else {
6238 bt_dev_err(hdev, "Dropping invalid advertising data");
6239 }
6240 }
6241
6242 hci_dev_unlock(hdev);
6243 }
6244
ext_evt_type_to_legacy(struct hci_dev * hdev,u16 evt_type)6245 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6246 {
6247 if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6248 switch (evt_type) {
6249 case LE_LEGACY_ADV_IND:
6250 return LE_ADV_IND;
6251 case LE_LEGACY_ADV_DIRECT_IND:
6252 return LE_ADV_DIRECT_IND;
6253 case LE_LEGACY_ADV_SCAN_IND:
6254 return LE_ADV_SCAN_IND;
6255 case LE_LEGACY_NONCONN_IND:
6256 return LE_ADV_NONCONN_IND;
6257 case LE_LEGACY_SCAN_RSP_ADV:
6258 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6259 return LE_ADV_SCAN_RSP;
6260 }
6261
6262 goto invalid;
6263 }
6264
6265 if (evt_type & LE_EXT_ADV_CONN_IND) {
6266 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6267 return LE_ADV_DIRECT_IND;
6268
6269 return LE_ADV_IND;
6270 }
6271
6272 if (evt_type & LE_EXT_ADV_SCAN_RSP)
6273 return LE_ADV_SCAN_RSP;
6274
6275 if (evt_type & LE_EXT_ADV_SCAN_IND)
6276 return LE_ADV_SCAN_IND;
6277
6278 if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6279 evt_type & LE_EXT_ADV_DIRECT_IND)
6280 return LE_ADV_NONCONN_IND;
6281
6282 invalid:
6283 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6284 evt_type);
6285
6286 return LE_ADV_INVALID;
6287 }
6288
hci_le_ext_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6289 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6290 struct sk_buff *skb)
6291 {
6292 struct hci_ev_le_ext_adv_report *ev = data;
6293 u64 instant = jiffies;
6294
6295 if (!ev->num)
6296 return;
6297
6298 hci_dev_lock(hdev);
6299
6300 while (ev->num--) {
6301 struct hci_ev_le_ext_adv_info *info;
6302 u8 legacy_evt_type;
6303 u16 evt_type;
6304
6305 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6306 sizeof(*info));
6307 if (!info)
6308 break;
6309
6310 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6311 info->length))
6312 break;
6313
6314 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6315 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6316 if (legacy_evt_type != LE_ADV_INVALID) {
6317 process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6318 info->bdaddr_type, NULL, 0,
6319 info->rssi, info->data, info->length,
6320 !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6321 false, instant);
6322 }
6323 }
6324
6325 hci_dev_unlock(hdev);
6326 }
6327
hci_le_pa_term_sync(struct hci_dev * hdev,__le16 handle)6328 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6329 {
6330 struct hci_cp_le_pa_term_sync cp;
6331
6332 memset(&cp, 0, sizeof(cp));
6333 cp.handle = handle;
6334
6335 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6336 }
6337
hci_le_pa_sync_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6338 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6339 struct sk_buff *skb)
6340 {
6341 struct hci_ev_le_pa_sync_established *ev = data;
6342 int mask = hdev->link_mode;
6343 __u8 flags = 0;
6344 struct hci_conn *pa_sync;
6345
6346 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6347
6348 hci_dev_lock(hdev);
6349
6350 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6351
6352 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags);
6353 if (!(mask & HCI_LM_ACCEPT)) {
6354 hci_le_pa_term_sync(hdev, ev->handle);
6355 goto unlock;
6356 }
6357
6358 if (!(flags & HCI_PROTO_DEFER))
6359 goto unlock;
6360
6361 if (ev->status) {
6362 /* Add connection to indicate the failed PA sync event */
6363 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6364 HCI_ROLE_SLAVE);
6365
6366 if (!pa_sync)
6367 goto unlock;
6368
6369 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6370
6371 /* Notify iso layer */
6372 hci_connect_cfm(pa_sync, ev->status);
6373 }
6374
6375 unlock:
6376 hci_dev_unlock(hdev);
6377 }
6378
hci_le_per_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6379 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6380 struct sk_buff *skb)
6381 {
6382 struct hci_ev_le_per_adv_report *ev = data;
6383 int mask = hdev->link_mode;
6384 __u8 flags = 0;
6385
6386 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6387
6388 hci_dev_lock(hdev);
6389
6390 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6391 if (!(mask & HCI_LM_ACCEPT))
6392 hci_le_pa_term_sync(hdev, ev->sync_handle);
6393
6394 hci_dev_unlock(hdev);
6395 }
6396
hci_le_remote_feat_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6397 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6398 struct sk_buff *skb)
6399 {
6400 struct hci_ev_le_remote_feat_complete *ev = data;
6401 struct hci_conn *conn;
6402
6403 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6404
6405 hci_dev_lock(hdev);
6406
6407 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6408 if (conn) {
6409 if (!ev->status)
6410 memcpy(conn->features[0], ev->features, 8);
6411
6412 if (conn->state == BT_CONFIG) {
6413 __u8 status;
6414
6415 /* If the local controller supports peripheral-initiated
6416 * features exchange, but the remote controller does
6417 * not, then it is possible that the error code 0x1a
6418 * for unsupported remote feature gets returned.
6419 *
6420 * In this specific case, allow the connection to
6421 * transition into connected state and mark it as
6422 * successful.
6423 */
6424 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE &&
6425 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6426 status = 0x00;
6427 else
6428 status = ev->status;
6429
6430 conn->state = BT_CONNECTED;
6431 hci_connect_cfm(conn, status);
6432 hci_conn_drop(conn);
6433 }
6434 }
6435
6436 hci_dev_unlock(hdev);
6437 }
6438
hci_le_ltk_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6439 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6440 struct sk_buff *skb)
6441 {
6442 struct hci_ev_le_ltk_req *ev = data;
6443 struct hci_cp_le_ltk_reply cp;
6444 struct hci_cp_le_ltk_neg_reply neg;
6445 struct hci_conn *conn;
6446 struct smp_ltk *ltk;
6447
6448 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6449
6450 hci_dev_lock(hdev);
6451
6452 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6453 if (conn == NULL)
6454 goto not_found;
6455
6456 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6457 if (!ltk)
6458 goto not_found;
6459
6460 if (smp_ltk_is_sc(ltk)) {
6461 /* With SC both EDiv and Rand are set to zero */
6462 if (ev->ediv || ev->rand)
6463 goto not_found;
6464 } else {
6465 /* For non-SC keys check that EDiv and Rand match */
6466 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6467 goto not_found;
6468 }
6469
6470 memcpy(cp.ltk, ltk->val, ltk->enc_size);
6471 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6472 cp.handle = cpu_to_le16(conn->handle);
6473
6474 conn->pending_sec_level = smp_ltk_sec_level(ltk);
6475
6476 conn->enc_key_size = ltk->enc_size;
6477
6478 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6479
6480 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6481 * temporary key used to encrypt a connection following
6482 * pairing. It is used during the Encrypted Session Setup to
6483 * distribute the keys. Later, security can be re-established
6484 * using a distributed LTK.
6485 */
6486 if (ltk->type == SMP_STK) {
6487 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6488 list_del_rcu(<k->list);
6489 kfree_rcu(ltk, rcu);
6490 } else {
6491 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6492 }
6493
6494 hci_dev_unlock(hdev);
6495
6496 return;
6497
6498 not_found:
6499 neg.handle = ev->handle;
6500 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6501 hci_dev_unlock(hdev);
6502 }
6503
send_conn_param_neg_reply(struct hci_dev * hdev,u16 handle,u8 reason)6504 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6505 u8 reason)
6506 {
6507 struct hci_cp_le_conn_param_req_neg_reply cp;
6508
6509 cp.handle = cpu_to_le16(handle);
6510 cp.reason = reason;
6511
6512 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6513 &cp);
6514 }
6515
hci_le_remote_conn_param_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6516 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6517 struct sk_buff *skb)
6518 {
6519 struct hci_ev_le_remote_conn_param_req *ev = data;
6520 struct hci_cp_le_conn_param_req_reply cp;
6521 struct hci_conn *hcon;
6522 u16 handle, min, max, latency, timeout;
6523
6524 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6525
6526 handle = le16_to_cpu(ev->handle);
6527 min = le16_to_cpu(ev->interval_min);
6528 max = le16_to_cpu(ev->interval_max);
6529 latency = le16_to_cpu(ev->latency);
6530 timeout = le16_to_cpu(ev->timeout);
6531
6532 hcon = hci_conn_hash_lookup_handle(hdev, handle);
6533 if (!hcon || hcon->state != BT_CONNECTED)
6534 return send_conn_param_neg_reply(hdev, handle,
6535 HCI_ERROR_UNKNOWN_CONN_ID);
6536
6537 if (max > hcon->le_conn_max_interval)
6538 return send_conn_param_neg_reply(hdev, handle,
6539 HCI_ERROR_INVALID_LL_PARAMS);
6540
6541 if (hci_check_conn_params(min, max, latency, timeout))
6542 return send_conn_param_neg_reply(hdev, handle,
6543 HCI_ERROR_INVALID_LL_PARAMS);
6544
6545 if (hcon->role == HCI_ROLE_MASTER) {
6546 struct hci_conn_params *params;
6547 u8 store_hint;
6548
6549 hci_dev_lock(hdev);
6550
6551 params = hci_conn_params_lookup(hdev, &hcon->dst,
6552 hcon->dst_type);
6553 if (params) {
6554 params->conn_min_interval = min;
6555 params->conn_max_interval = max;
6556 params->conn_latency = latency;
6557 params->supervision_timeout = timeout;
6558 store_hint = 0x01;
6559 } else {
6560 store_hint = 0x00;
6561 }
6562
6563 hci_dev_unlock(hdev);
6564
6565 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6566 store_hint, min, max, latency, timeout);
6567 }
6568
6569 cp.handle = ev->handle;
6570 cp.interval_min = ev->interval_min;
6571 cp.interval_max = ev->interval_max;
6572 cp.latency = ev->latency;
6573 cp.timeout = ev->timeout;
6574 cp.min_ce_len = 0;
6575 cp.max_ce_len = 0;
6576
6577 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6578 }
6579
hci_le_direct_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6580 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6581 struct sk_buff *skb)
6582 {
6583 struct hci_ev_le_direct_adv_report *ev = data;
6584 u64 instant = jiffies;
6585 int i;
6586
6587 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6588 flex_array_size(ev, info, ev->num)))
6589 return;
6590
6591 if (!ev->num)
6592 return;
6593
6594 hci_dev_lock(hdev);
6595
6596 for (i = 0; i < ev->num; i++) {
6597 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6598
6599 process_adv_report(hdev, info->type, &info->bdaddr,
6600 info->bdaddr_type, &info->direct_addr,
6601 info->direct_addr_type, info->rssi, NULL, 0,
6602 false, false, instant);
6603 }
6604
6605 hci_dev_unlock(hdev);
6606 }
6607
hci_le_phy_update_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6608 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6609 struct sk_buff *skb)
6610 {
6611 struct hci_ev_le_phy_update_complete *ev = data;
6612 struct hci_conn *conn;
6613
6614 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6615
6616 if (ev->status)
6617 return;
6618
6619 hci_dev_lock(hdev);
6620
6621 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6622 if (!conn)
6623 goto unlock;
6624
6625 conn->le_tx_phy = ev->tx_phy;
6626 conn->le_rx_phy = ev->rx_phy;
6627
6628 unlock:
6629 hci_dev_unlock(hdev);
6630 }
6631
hci_le_cis_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6632 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6633 struct sk_buff *skb)
6634 {
6635 struct hci_evt_le_cis_established *ev = data;
6636 struct hci_conn *conn;
6637 struct bt_iso_qos *qos;
6638 bool pending = false;
6639 u16 handle = __le16_to_cpu(ev->handle);
6640 u32 c_sdu_interval, p_sdu_interval;
6641
6642 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6643
6644 hci_dev_lock(hdev);
6645
6646 conn = hci_conn_hash_lookup_handle(hdev, handle);
6647 if (!conn) {
6648 bt_dev_err(hdev,
6649 "Unable to find connection with handle 0x%4.4x",
6650 handle);
6651 goto unlock;
6652 }
6653
6654 if (conn->type != ISO_LINK) {
6655 bt_dev_err(hdev,
6656 "Invalid connection link type handle 0x%4.4x",
6657 handle);
6658 goto unlock;
6659 }
6660
6661 qos = &conn->iso_qos;
6662
6663 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6664
6665 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part G
6666 * page 3075:
6667 * Transport_Latency_C_To_P = CIG_Sync_Delay + (FT_C_To_P) ×
6668 * ISO_Interval + SDU_Interval_C_To_P
6669 * ...
6670 * SDU_Interval = (CIG_Sync_Delay + (FT) x ISO_Interval) -
6671 * Transport_Latency
6672 */
6673 c_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6674 (ev->c_ft * le16_to_cpu(ev->interval) * 1250)) -
6675 get_unaligned_le24(ev->c_latency);
6676 p_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6677 (ev->p_ft * le16_to_cpu(ev->interval) * 1250)) -
6678 get_unaligned_le24(ev->p_latency);
6679
6680 switch (conn->role) {
6681 case HCI_ROLE_SLAVE:
6682 qos->ucast.in.interval = c_sdu_interval;
6683 qos->ucast.out.interval = p_sdu_interval;
6684 /* Convert Transport Latency (us) to Latency (msec) */
6685 qos->ucast.in.latency =
6686 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6687 1000);
6688 qos->ucast.out.latency =
6689 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6690 1000);
6691 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6692 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6693 qos->ucast.in.phy = ev->c_phy;
6694 qos->ucast.out.phy = ev->p_phy;
6695 break;
6696 case HCI_ROLE_MASTER:
6697 qos->ucast.in.interval = p_sdu_interval;
6698 qos->ucast.out.interval = c_sdu_interval;
6699 /* Convert Transport Latency (us) to Latency (msec) */
6700 qos->ucast.out.latency =
6701 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6702 1000);
6703 qos->ucast.in.latency =
6704 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6705 1000);
6706 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6707 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6708 qos->ucast.out.phy = ev->c_phy;
6709 qos->ucast.in.phy = ev->p_phy;
6710 break;
6711 }
6712
6713 if (!ev->status) {
6714 conn->state = BT_CONNECTED;
6715 hci_debugfs_create_conn(conn);
6716 hci_conn_add_sysfs(conn);
6717 hci_iso_setup_path(conn);
6718 goto unlock;
6719 }
6720
6721 conn->state = BT_CLOSED;
6722 hci_connect_cfm(conn, ev->status);
6723 hci_conn_del(conn);
6724
6725 unlock:
6726 if (pending)
6727 hci_le_create_cis_pending(hdev);
6728
6729 hci_dev_unlock(hdev);
6730 }
6731
hci_le_reject_cis(struct hci_dev * hdev,__le16 handle)6732 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6733 {
6734 struct hci_cp_le_reject_cis cp;
6735
6736 memset(&cp, 0, sizeof(cp));
6737 cp.handle = handle;
6738 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6739 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6740 }
6741
hci_le_accept_cis(struct hci_dev * hdev,__le16 handle)6742 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6743 {
6744 struct hci_cp_le_accept_cis cp;
6745
6746 memset(&cp, 0, sizeof(cp));
6747 cp.handle = handle;
6748 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6749 }
6750
hci_le_cis_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6751 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6752 struct sk_buff *skb)
6753 {
6754 struct hci_evt_le_cis_req *ev = data;
6755 u16 acl_handle, cis_handle;
6756 struct hci_conn *acl, *cis;
6757 int mask;
6758 __u8 flags = 0;
6759
6760 acl_handle = __le16_to_cpu(ev->acl_handle);
6761 cis_handle = __le16_to_cpu(ev->cis_handle);
6762
6763 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
6764 acl_handle, cis_handle, ev->cig_id, ev->cis_id);
6765
6766 hci_dev_lock(hdev);
6767
6768 acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
6769 if (!acl)
6770 goto unlock;
6771
6772 mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
6773 if (!(mask & HCI_LM_ACCEPT)) {
6774 hci_le_reject_cis(hdev, ev->cis_handle);
6775 goto unlock;
6776 }
6777
6778 cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
6779 if (!cis) {
6780 cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
6781 cis_handle);
6782 if (IS_ERR(cis)) {
6783 hci_le_reject_cis(hdev, ev->cis_handle);
6784 goto unlock;
6785 }
6786 }
6787
6788 cis->iso_qos.ucast.cig = ev->cig_id;
6789 cis->iso_qos.ucast.cis = ev->cis_id;
6790
6791 if (!(flags & HCI_PROTO_DEFER)) {
6792 hci_le_accept_cis(hdev, ev->cis_handle);
6793 } else {
6794 cis->state = BT_CONNECT2;
6795 hci_connect_cfm(cis, 0);
6796 }
6797
6798 unlock:
6799 hci_dev_unlock(hdev);
6800 }
6801
hci_iso_term_big_sync(struct hci_dev * hdev,void * data)6802 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
6803 {
6804 u8 handle = PTR_UINT(data);
6805
6806 return hci_le_terminate_big_sync(hdev, handle,
6807 HCI_ERROR_LOCAL_HOST_TERM);
6808 }
6809
hci_le_create_big_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6810 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
6811 struct sk_buff *skb)
6812 {
6813 struct hci_evt_le_create_big_complete *ev = data;
6814 struct hci_conn *conn;
6815 __u8 i = 0;
6816
6817 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
6818
6819 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
6820 flex_array_size(ev, bis_handle, ev->num_bis)))
6821 return;
6822
6823 hci_dev_lock(hdev);
6824 rcu_read_lock();
6825
6826 /* Connect all BISes that are bound to the BIG */
6827 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6828 if (bacmp(&conn->dst, BDADDR_ANY) ||
6829 conn->type != ISO_LINK ||
6830 conn->iso_qos.bcast.big != ev->handle)
6831 continue;
6832
6833 if (hci_conn_set_handle(conn,
6834 __le16_to_cpu(ev->bis_handle[i++])))
6835 continue;
6836
6837 if (!ev->status) {
6838 conn->state = BT_CONNECTED;
6839 set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
6840 rcu_read_unlock();
6841 hci_debugfs_create_conn(conn);
6842 hci_conn_add_sysfs(conn);
6843 hci_iso_setup_path(conn);
6844 rcu_read_lock();
6845 continue;
6846 }
6847
6848 hci_connect_cfm(conn, ev->status);
6849 rcu_read_unlock();
6850 hci_conn_del(conn);
6851 rcu_read_lock();
6852 }
6853
6854 rcu_read_unlock();
6855
6856 if (!ev->status && !i)
6857 /* If no BISes have been connected for the BIG,
6858 * terminate. This is in case all bound connections
6859 * have been closed before the BIG creation
6860 * has completed.
6861 */
6862 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
6863 UINT_PTR(ev->handle), NULL);
6864
6865 hci_dev_unlock(hdev);
6866 }
6867
hci_le_big_sync_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6868 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
6869 struct sk_buff *skb)
6870 {
6871 struct hci_evt_le_big_sync_estabilished *ev = data;
6872 struct hci_conn *bis;
6873 struct hci_conn *pa_sync;
6874 int i;
6875
6876 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6877
6878 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
6879 flex_array_size(ev, bis, ev->num_bis)))
6880 return;
6881
6882 hci_dev_lock(hdev);
6883
6884 if (!ev->status) {
6885 pa_sync = hci_conn_hash_lookup_pa_sync_big_handle(hdev, ev->handle);
6886 if (pa_sync)
6887 /* Also mark the BIG sync established event on the
6888 * associated PA sync hcon
6889 */
6890 set_bit(HCI_CONN_BIG_SYNC, &pa_sync->flags);
6891 }
6892
6893 for (i = 0; i < ev->num_bis; i++) {
6894 u16 handle = le16_to_cpu(ev->bis[i]);
6895 __le32 interval;
6896
6897 bis = hci_conn_hash_lookup_handle(hdev, handle);
6898 if (!bis) {
6899 if (handle > HCI_CONN_HANDLE_MAX) {
6900 bt_dev_dbg(hdev, "ignore too large handle %u", handle);
6901 continue;
6902 }
6903 bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
6904 HCI_ROLE_SLAVE, handle);
6905 if (IS_ERR(bis))
6906 continue;
6907 }
6908
6909 if (ev->status != 0x42)
6910 /* Mark PA sync as established */
6911 set_bit(HCI_CONN_PA_SYNC, &bis->flags);
6912
6913 bis->iso_qos.bcast.big = ev->handle;
6914 memset(&interval, 0, sizeof(interval));
6915 memcpy(&interval, ev->latency, sizeof(ev->latency));
6916 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
6917 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
6918 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
6919 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
6920
6921 if (!ev->status) {
6922 set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
6923 hci_iso_setup_path(bis);
6924 }
6925 }
6926
6927 /* In case BIG sync failed, notify each failed connection to
6928 * the user after all hci connections have been added
6929 */
6930 if (ev->status)
6931 for (i = 0; i < ev->num_bis; i++) {
6932 u16 handle = le16_to_cpu(ev->bis[i]);
6933
6934 bis = hci_conn_hash_lookup_handle(hdev, handle);
6935 if (!bis)
6936 continue;
6937
6938 set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
6939 hci_connect_cfm(bis, ev->status);
6940 }
6941
6942 hci_dev_unlock(hdev);
6943 }
6944
hci_le_big_info_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6945 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
6946 struct sk_buff *skb)
6947 {
6948 struct hci_evt_le_big_info_adv_report *ev = data;
6949 int mask = hdev->link_mode;
6950 __u8 flags = 0;
6951 struct hci_conn *pa_sync;
6952
6953 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6954
6955 hci_dev_lock(hdev);
6956
6957 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6958 if (!(mask & HCI_LM_ACCEPT)) {
6959 hci_le_pa_term_sync(hdev, ev->sync_handle);
6960 goto unlock;
6961 }
6962
6963 if (!(flags & HCI_PROTO_DEFER))
6964 goto unlock;
6965
6966 pa_sync = hci_conn_hash_lookup_pa_sync_handle
6967 (hdev,
6968 le16_to_cpu(ev->sync_handle));
6969
6970 if (pa_sync)
6971 goto unlock;
6972
6973 /* Add connection to indicate the PA sync event */
6974 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6975 HCI_ROLE_SLAVE);
6976
6977 if (IS_ERR(pa_sync))
6978 goto unlock;
6979
6980 pa_sync->sync_handle = le16_to_cpu(ev->sync_handle);
6981 set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags);
6982
6983 /* Notify iso layer */
6984 hci_connect_cfm(pa_sync, 0x00);
6985
6986 /* Notify MGMT layer */
6987 mgmt_device_connected(hdev, pa_sync, NULL, 0);
6988
6989 unlock:
6990 hci_dev_unlock(hdev);
6991 }
6992
6993 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
6994 [_op] = { \
6995 .func = _func, \
6996 .min_len = _min_len, \
6997 .max_len = _max_len, \
6998 }
6999
7000 #define HCI_LE_EV(_op, _func, _len) \
7001 HCI_LE_EV_VL(_op, _func, _len, _len)
7002
7003 #define HCI_LE_EV_STATUS(_op, _func) \
7004 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
7005
7006 /* Entries in this table shall have their position according to the subevent
7007 * opcode they handle so the use of the macros above is recommend since it does
7008 * attempt to initialize at its proper index using Designated Initializers that
7009 * way events without a callback function can be ommited.
7010 */
7011 static const struct hci_le_ev {
7012 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
7013 u16 min_len;
7014 u16 max_len;
7015 } hci_le_ev_table[U8_MAX + 1] = {
7016 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
7017 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
7018 sizeof(struct hci_ev_le_conn_complete)),
7019 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
7020 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
7021 sizeof(struct hci_ev_le_advertising_report),
7022 HCI_MAX_EVENT_SIZE),
7023 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7024 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7025 hci_le_conn_update_complete_evt,
7026 sizeof(struct hci_ev_le_conn_update_complete)),
7027 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7028 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7029 hci_le_remote_feat_complete_evt,
7030 sizeof(struct hci_ev_le_remote_feat_complete)),
7031 /* [0x05 = HCI_EV_LE_LTK_REQ] */
7032 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7033 sizeof(struct hci_ev_le_ltk_req)),
7034 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7035 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7036 hci_le_remote_conn_param_req_evt,
7037 sizeof(struct hci_ev_le_remote_conn_param_req)),
7038 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7039 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7040 hci_le_enh_conn_complete_evt,
7041 sizeof(struct hci_ev_le_enh_conn_complete)),
7042 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7043 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7044 sizeof(struct hci_ev_le_direct_adv_report),
7045 HCI_MAX_EVENT_SIZE),
7046 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7047 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7048 sizeof(struct hci_ev_le_phy_update_complete)),
7049 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7050 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7051 sizeof(struct hci_ev_le_ext_adv_report),
7052 HCI_MAX_EVENT_SIZE),
7053 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7054 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7055 hci_le_pa_sync_estabilished_evt,
7056 sizeof(struct hci_ev_le_pa_sync_established)),
7057 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7058 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7059 hci_le_per_adv_report_evt,
7060 sizeof(struct hci_ev_le_per_adv_report),
7061 HCI_MAX_EVENT_SIZE),
7062 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7063 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7064 sizeof(struct hci_evt_le_ext_adv_set_term)),
7065 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7066 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7067 sizeof(struct hci_evt_le_cis_established)),
7068 /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7069 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7070 sizeof(struct hci_evt_le_cis_req)),
7071 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7072 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7073 hci_le_create_big_complete_evt,
7074 sizeof(struct hci_evt_le_create_big_complete),
7075 HCI_MAX_EVENT_SIZE),
7076 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABILISHED] */
7077 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7078 hci_le_big_sync_established_evt,
7079 sizeof(struct hci_evt_le_big_sync_estabilished),
7080 HCI_MAX_EVENT_SIZE),
7081 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7082 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7083 hci_le_big_info_adv_report_evt,
7084 sizeof(struct hci_evt_le_big_info_adv_report),
7085 HCI_MAX_EVENT_SIZE),
7086 };
7087
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)7088 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7089 struct sk_buff *skb, u16 *opcode, u8 *status,
7090 hci_req_complete_t *req_complete,
7091 hci_req_complete_skb_t *req_complete_skb)
7092 {
7093 struct hci_ev_le_meta *ev = data;
7094 const struct hci_le_ev *subev;
7095
7096 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7097
7098 /* Only match event if command OGF is for LE */
7099 if (hdev->req_skb &&
7100 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 &&
7101 hci_skb_event(hdev->req_skb) == ev->subevent) {
7102 *opcode = hci_skb_opcode(hdev->req_skb);
7103 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7104 req_complete_skb);
7105 }
7106
7107 subev = &hci_le_ev_table[ev->subevent];
7108 if (!subev->func)
7109 return;
7110
7111 if (skb->len < subev->min_len) {
7112 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7113 ev->subevent, skb->len, subev->min_len);
7114 return;
7115 }
7116
7117 /* Just warn if the length is over max_len size it still be
7118 * possible to partially parse the event so leave to callback to
7119 * decide if that is acceptable.
7120 */
7121 if (skb->len > subev->max_len)
7122 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7123 ev->subevent, skb->len, subev->max_len);
7124 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7125 if (!data)
7126 return;
7127
7128 subev->func(hdev, data, skb);
7129 }
7130
hci_get_cmd_complete(struct hci_dev * hdev,u16 opcode,u8 event,struct sk_buff * skb)7131 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7132 u8 event, struct sk_buff *skb)
7133 {
7134 struct hci_ev_cmd_complete *ev;
7135 struct hci_event_hdr *hdr;
7136
7137 if (!skb)
7138 return false;
7139
7140 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7141 if (!hdr)
7142 return false;
7143
7144 if (event) {
7145 if (hdr->evt != event)
7146 return false;
7147 return true;
7148 }
7149
7150 /* Check if request ended in Command Status - no way to retrieve
7151 * any extra parameters in this case.
7152 */
7153 if (hdr->evt == HCI_EV_CMD_STATUS)
7154 return false;
7155
7156 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7157 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7158 hdr->evt);
7159 return false;
7160 }
7161
7162 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7163 if (!ev)
7164 return false;
7165
7166 if (opcode != __le16_to_cpu(ev->opcode)) {
7167 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7168 __le16_to_cpu(ev->opcode));
7169 return false;
7170 }
7171
7172 return true;
7173 }
7174
hci_store_wake_reason(struct hci_dev * hdev,u8 event,struct sk_buff * skb)7175 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7176 struct sk_buff *skb)
7177 {
7178 struct hci_ev_le_advertising_info *adv;
7179 struct hci_ev_le_direct_adv_info *direct_adv;
7180 struct hci_ev_le_ext_adv_info *ext_adv;
7181 const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7182 const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7183
7184 hci_dev_lock(hdev);
7185
7186 /* If we are currently suspended and this is the first BT event seen,
7187 * save the wake reason associated with the event.
7188 */
7189 if (!hdev->suspended || hdev->wake_reason)
7190 goto unlock;
7191
7192 /* Default to remote wake. Values for wake_reason are documented in the
7193 * Bluez mgmt api docs.
7194 */
7195 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7196
7197 /* Once configured for remote wakeup, we should only wake up for
7198 * reconnections. It's useful to see which device is waking us up so
7199 * keep track of the bdaddr of the connection event that woke us up.
7200 */
7201 if (event == HCI_EV_CONN_REQUEST) {
7202 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7203 hdev->wake_addr_type = BDADDR_BREDR;
7204 } else if (event == HCI_EV_CONN_COMPLETE) {
7205 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7206 hdev->wake_addr_type = BDADDR_BREDR;
7207 } else if (event == HCI_EV_LE_META) {
7208 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7209 u8 subevent = le_ev->subevent;
7210 u8 *ptr = &skb->data[sizeof(*le_ev)];
7211 u8 num_reports = *ptr;
7212
7213 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7214 subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7215 subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7216 num_reports) {
7217 adv = (void *)(ptr + 1);
7218 direct_adv = (void *)(ptr + 1);
7219 ext_adv = (void *)(ptr + 1);
7220
7221 switch (subevent) {
7222 case HCI_EV_LE_ADVERTISING_REPORT:
7223 bacpy(&hdev->wake_addr, &adv->bdaddr);
7224 hdev->wake_addr_type = adv->bdaddr_type;
7225 break;
7226 case HCI_EV_LE_DIRECT_ADV_REPORT:
7227 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7228 hdev->wake_addr_type = direct_adv->bdaddr_type;
7229 break;
7230 case HCI_EV_LE_EXT_ADV_REPORT:
7231 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7232 hdev->wake_addr_type = ext_adv->bdaddr_type;
7233 break;
7234 }
7235 }
7236 } else {
7237 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7238 }
7239
7240 unlock:
7241 hci_dev_unlock(hdev);
7242 }
7243
7244 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7245 [_op] = { \
7246 .req = false, \
7247 .func = _func, \
7248 .min_len = _min_len, \
7249 .max_len = _max_len, \
7250 }
7251
7252 #define HCI_EV(_op, _func, _len) \
7253 HCI_EV_VL(_op, _func, _len, _len)
7254
7255 #define HCI_EV_STATUS(_op, _func) \
7256 HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7257
7258 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7259 [_op] = { \
7260 .req = true, \
7261 .func_req = _func, \
7262 .min_len = _min_len, \
7263 .max_len = _max_len, \
7264 }
7265
7266 #define HCI_EV_REQ(_op, _func, _len) \
7267 HCI_EV_REQ_VL(_op, _func, _len, _len)
7268
7269 /* Entries in this table shall have their position according to the event opcode
7270 * they handle so the use of the macros above is recommend since it does attempt
7271 * to initialize at its proper index using Designated Initializers that way
7272 * events without a callback function don't have entered.
7273 */
7274 static const struct hci_ev {
7275 bool req;
7276 union {
7277 void (*func)(struct hci_dev *hdev, void *data,
7278 struct sk_buff *skb);
7279 void (*func_req)(struct hci_dev *hdev, void *data,
7280 struct sk_buff *skb, u16 *opcode, u8 *status,
7281 hci_req_complete_t *req_complete,
7282 hci_req_complete_skb_t *req_complete_skb);
7283 };
7284 u16 min_len;
7285 u16 max_len;
7286 } hci_ev_table[U8_MAX + 1] = {
7287 /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7288 HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7289 /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7290 HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7291 sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7292 /* [0x03 = HCI_EV_CONN_COMPLETE] */
7293 HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7294 sizeof(struct hci_ev_conn_complete)),
7295 /* [0x04 = HCI_EV_CONN_REQUEST] */
7296 HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7297 sizeof(struct hci_ev_conn_request)),
7298 /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7299 HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7300 sizeof(struct hci_ev_disconn_complete)),
7301 /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7302 HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7303 sizeof(struct hci_ev_auth_complete)),
7304 /* [0x07 = HCI_EV_REMOTE_NAME] */
7305 HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7306 sizeof(struct hci_ev_remote_name)),
7307 /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7308 HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7309 sizeof(struct hci_ev_encrypt_change)),
7310 /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7311 HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7312 hci_change_link_key_complete_evt,
7313 sizeof(struct hci_ev_change_link_key_complete)),
7314 /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7315 HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7316 sizeof(struct hci_ev_remote_features)),
7317 /* [0x0e = HCI_EV_CMD_COMPLETE] */
7318 HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7319 sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7320 /* [0x0f = HCI_EV_CMD_STATUS] */
7321 HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7322 sizeof(struct hci_ev_cmd_status)),
7323 /* [0x10 = HCI_EV_CMD_STATUS] */
7324 HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7325 sizeof(struct hci_ev_hardware_error)),
7326 /* [0x12 = HCI_EV_ROLE_CHANGE] */
7327 HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7328 sizeof(struct hci_ev_role_change)),
7329 /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7330 HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7331 sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7332 /* [0x14 = HCI_EV_MODE_CHANGE] */
7333 HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7334 sizeof(struct hci_ev_mode_change)),
7335 /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7336 HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7337 sizeof(struct hci_ev_pin_code_req)),
7338 /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7339 HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7340 sizeof(struct hci_ev_link_key_req)),
7341 /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7342 HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7343 sizeof(struct hci_ev_link_key_notify)),
7344 /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7345 HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7346 sizeof(struct hci_ev_clock_offset)),
7347 /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7348 HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7349 sizeof(struct hci_ev_pkt_type_change)),
7350 /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7351 HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7352 sizeof(struct hci_ev_pscan_rep_mode)),
7353 /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7354 HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7355 hci_inquiry_result_with_rssi_evt,
7356 sizeof(struct hci_ev_inquiry_result_rssi),
7357 HCI_MAX_EVENT_SIZE),
7358 /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7359 HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7360 sizeof(struct hci_ev_remote_ext_features)),
7361 /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7362 HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7363 sizeof(struct hci_ev_sync_conn_complete)),
7364 /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7365 HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7366 hci_extended_inquiry_result_evt,
7367 sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7368 /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7369 HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7370 sizeof(struct hci_ev_key_refresh_complete)),
7371 /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7372 HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7373 sizeof(struct hci_ev_io_capa_request)),
7374 /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7375 HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7376 sizeof(struct hci_ev_io_capa_reply)),
7377 /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7378 HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7379 sizeof(struct hci_ev_user_confirm_req)),
7380 /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7381 HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7382 sizeof(struct hci_ev_user_passkey_req)),
7383 /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7384 HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7385 sizeof(struct hci_ev_remote_oob_data_request)),
7386 /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7387 HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7388 sizeof(struct hci_ev_simple_pair_complete)),
7389 /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7390 HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7391 sizeof(struct hci_ev_user_passkey_notify)),
7392 /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7393 HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7394 sizeof(struct hci_ev_keypress_notify)),
7395 /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7396 HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7397 sizeof(struct hci_ev_remote_host_features)),
7398 /* [0x3e = HCI_EV_LE_META] */
7399 HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7400 sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7401 /* [0xff = HCI_EV_VENDOR] */
7402 HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7403 };
7404
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)7405 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7406 u16 *opcode, u8 *status,
7407 hci_req_complete_t *req_complete,
7408 hci_req_complete_skb_t *req_complete_skb)
7409 {
7410 const struct hci_ev *ev = &hci_ev_table[event];
7411 void *data;
7412
7413 if (!ev->func)
7414 return;
7415
7416 if (skb->len < ev->min_len) {
7417 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7418 event, skb->len, ev->min_len);
7419 return;
7420 }
7421
7422 /* Just warn if the length is over max_len size it still be
7423 * possible to partially parse the event so leave to callback to
7424 * decide if that is acceptable.
7425 */
7426 if (skb->len > ev->max_len)
7427 bt_dev_warn_ratelimited(hdev,
7428 "unexpected event 0x%2.2x length: %u > %u",
7429 event, skb->len, ev->max_len);
7430
7431 data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7432 if (!data)
7433 return;
7434
7435 if (ev->req)
7436 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7437 req_complete_skb);
7438 else
7439 ev->func(hdev, data, skb);
7440 }
7441
hci_event_packet(struct hci_dev * hdev,struct sk_buff * skb)7442 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7443 {
7444 struct hci_event_hdr *hdr = (void *) skb->data;
7445 hci_req_complete_t req_complete = NULL;
7446 hci_req_complete_skb_t req_complete_skb = NULL;
7447 struct sk_buff *orig_skb = NULL;
7448 u8 status = 0, event, req_evt = 0;
7449 u16 opcode = HCI_OP_NOP;
7450
7451 if (skb->len < sizeof(*hdr)) {
7452 bt_dev_err(hdev, "Malformed HCI Event");
7453 goto done;
7454 }
7455
7456 kfree_skb(hdev->recv_event);
7457 hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7458
7459 event = hdr->evt;
7460 if (!event) {
7461 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7462 event);
7463 goto done;
7464 }
7465
7466 /* Only match event if command OGF is not for LE */
7467 if (hdev->req_skb &&
7468 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) != 0x08 &&
7469 hci_skb_event(hdev->req_skb) == event) {
7470 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->req_skb),
7471 status, &req_complete, &req_complete_skb);
7472 req_evt = event;
7473 }
7474
7475 /* If it looks like we might end up having to call
7476 * req_complete_skb, store a pristine copy of the skb since the
7477 * various handlers may modify the original one through
7478 * skb_pull() calls, etc.
7479 */
7480 if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7481 event == HCI_EV_CMD_COMPLETE)
7482 orig_skb = skb_clone(skb, GFP_KERNEL);
7483
7484 skb_pull(skb, HCI_EVENT_HDR_SIZE);
7485
7486 /* Store wake reason if we're suspended */
7487 hci_store_wake_reason(hdev, event, skb);
7488
7489 bt_dev_dbg(hdev, "event 0x%2.2x", event);
7490
7491 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7492 &req_complete_skb);
7493
7494 if (req_complete) {
7495 req_complete(hdev, status, opcode);
7496 } else if (req_complete_skb) {
7497 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7498 kfree_skb(orig_skb);
7499 orig_skb = NULL;
7500 }
7501 req_complete_skb(hdev, status, opcode, orig_skb);
7502 }
7503
7504 done:
7505 kfree_skb(orig_skb);
7506 kfree_skb(skb);
7507 hdev->stat.evt_rx++;
7508 }
7509