1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
4 Copyright 2023-2024 NXP
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24 */
25
26 /* Bluetooth HCI event handling. */
27
28 #include <linux/unaligned.h>
29 #include <linux/crypto.h>
30 #include <crypto/algapi.h>
31
32 #include <net/bluetooth/bluetooth.h>
33 #include <net/bluetooth/hci_core.h>
34 #include <net/bluetooth/mgmt.h>
35
36 #include "hci_debugfs.h"
37 #include "hci_codec.h"
38 #include "smp.h"
39 #include "msft.h"
40 #include "eir.h"
41
42 #define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
43 "\x00\x00\x00\x00\x00\x00\x00\x00"
44
45 /* Handle HCI Event packets */
46
hci_ev_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u8 ev,size_t len)47 static void *hci_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
48 u8 ev, size_t len)
49 {
50 void *data;
51
52 data = skb_pull_data(skb, len);
53 if (!data)
54 bt_dev_err(hdev, "Malformed Event: 0x%2.2x", ev);
55
56 return data;
57 }
58
hci_cc_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u16 op,size_t len)59 static void *hci_cc_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
60 u16 op, size_t len)
61 {
62 void *data;
63
64 data = skb_pull_data(skb, len);
65 if (!data)
66 bt_dev_err(hdev, "Malformed Command Complete: 0x%4.4x", op);
67
68 return data;
69 }
70
hci_le_ev_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u8 ev,size_t len)71 static void *hci_le_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
72 u8 ev, size_t len)
73 {
74 void *data;
75
76 data = skb_pull_data(skb, len);
77 if (!data)
78 bt_dev_err(hdev, "Malformed LE Event: 0x%2.2x", ev);
79
80 return data;
81 }
82
hci_cc_inquiry_cancel(struct hci_dev * hdev,void * data,struct sk_buff * skb)83 static u8 hci_cc_inquiry_cancel(struct hci_dev *hdev, void *data,
84 struct sk_buff *skb)
85 {
86 struct hci_ev_status *rp = data;
87
88 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
89
90 /* It is possible that we receive Inquiry Complete event right
91 * before we receive Inquiry Cancel Command Complete event, in
92 * which case the latter event should have status of Command
93 * Disallowed. This should not be treated as error, since
94 * we actually achieve what Inquiry Cancel wants to achieve,
95 * which is to end the last Inquiry session.
96 */
97 if (rp->status == HCI_ERROR_COMMAND_DISALLOWED && !test_bit(HCI_INQUIRY, &hdev->flags)) {
98 bt_dev_warn(hdev, "Ignoring error of Inquiry Cancel command");
99 rp->status = 0x00;
100 }
101
102 if (rp->status)
103 return rp->status;
104
105 clear_bit(HCI_INQUIRY, &hdev->flags);
106 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
107 wake_up_bit(&hdev->flags, HCI_INQUIRY);
108
109 hci_dev_lock(hdev);
110 /* Set discovery state to stopped if we're not doing LE active
111 * scanning.
112 */
113 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
114 hdev->le_scan_type != LE_SCAN_ACTIVE)
115 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
116 hci_dev_unlock(hdev);
117
118 return rp->status;
119 }
120
hci_cc_periodic_inq(struct hci_dev * hdev,void * data,struct sk_buff * skb)121 static u8 hci_cc_periodic_inq(struct hci_dev *hdev, void *data,
122 struct sk_buff *skb)
123 {
124 struct hci_ev_status *rp = data;
125
126 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
127
128 if (rp->status)
129 return rp->status;
130
131 hci_dev_set_flag(hdev, HCI_PERIODIC_INQ);
132
133 return rp->status;
134 }
135
hci_cc_exit_periodic_inq(struct hci_dev * hdev,void * data,struct sk_buff * skb)136 static u8 hci_cc_exit_periodic_inq(struct hci_dev *hdev, void *data,
137 struct sk_buff *skb)
138 {
139 struct hci_ev_status *rp = data;
140
141 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
142
143 if (rp->status)
144 return rp->status;
145
146 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);
147
148 return rp->status;
149 }
150
hci_cc_remote_name_req_cancel(struct hci_dev * hdev,void * data,struct sk_buff * skb)151 static u8 hci_cc_remote_name_req_cancel(struct hci_dev *hdev, void *data,
152 struct sk_buff *skb)
153 {
154 struct hci_rp_remote_name_req_cancel *rp = data;
155
156 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
157
158 return rp->status;
159 }
160
hci_cc_role_discovery(struct hci_dev * hdev,void * data,struct sk_buff * skb)161 static u8 hci_cc_role_discovery(struct hci_dev *hdev, void *data,
162 struct sk_buff *skb)
163 {
164 struct hci_rp_role_discovery *rp = data;
165 struct hci_conn *conn;
166
167 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
168
169 if (rp->status)
170 return rp->status;
171
172 hci_dev_lock(hdev);
173
174 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
175 if (conn)
176 conn->role = rp->role;
177
178 hci_dev_unlock(hdev);
179
180 return rp->status;
181 }
182
hci_cc_read_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)183 static u8 hci_cc_read_link_policy(struct hci_dev *hdev, void *data,
184 struct sk_buff *skb)
185 {
186 struct hci_rp_read_link_policy *rp = data;
187 struct hci_conn *conn;
188
189 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
190
191 if (rp->status)
192 return rp->status;
193
194 hci_dev_lock(hdev);
195
196 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
197 if (conn)
198 conn->link_policy = __le16_to_cpu(rp->policy);
199
200 hci_dev_unlock(hdev);
201
202 return rp->status;
203 }
204
hci_cc_write_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)205 static u8 hci_cc_write_link_policy(struct hci_dev *hdev, void *data,
206 struct sk_buff *skb)
207 {
208 struct hci_rp_write_link_policy *rp = data;
209 struct hci_conn *conn;
210 void *sent;
211
212 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
213
214 if (rp->status)
215 return rp->status;
216
217 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY);
218 if (!sent)
219 return rp->status;
220
221 hci_dev_lock(hdev);
222
223 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
224 if (conn)
225 conn->link_policy = get_unaligned_le16(sent + 2);
226
227 hci_dev_unlock(hdev);
228
229 return rp->status;
230 }
231
hci_cc_read_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)232 static u8 hci_cc_read_def_link_policy(struct hci_dev *hdev, void *data,
233 struct sk_buff *skb)
234 {
235 struct hci_rp_read_def_link_policy *rp = data;
236
237 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
238
239 if (rp->status)
240 return rp->status;
241
242 hdev->link_policy = __le16_to_cpu(rp->policy);
243
244 return rp->status;
245 }
246
hci_cc_write_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)247 static u8 hci_cc_write_def_link_policy(struct hci_dev *hdev, void *data,
248 struct sk_buff *skb)
249 {
250 struct hci_ev_status *rp = data;
251 void *sent;
252
253 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
254
255 if (rp->status)
256 return rp->status;
257
258 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY);
259 if (!sent)
260 return rp->status;
261
262 hdev->link_policy = get_unaligned_le16(sent);
263
264 return rp->status;
265 }
266
hci_cc_reset(struct hci_dev * hdev,void * data,struct sk_buff * skb)267 static u8 hci_cc_reset(struct hci_dev *hdev, void *data, struct sk_buff *skb)
268 {
269 struct hci_ev_status *rp = data;
270
271 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
272
273 clear_bit(HCI_RESET, &hdev->flags);
274
275 if (rp->status)
276 return rp->status;
277
278 /* Reset all non-persistent flags */
279 hci_dev_clear_volatile_flags(hdev);
280
281 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
282
283 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
284 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
285
286 memset(hdev->adv_data, 0, sizeof(hdev->adv_data));
287 hdev->adv_data_len = 0;
288
289 memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data));
290 hdev->scan_rsp_data_len = 0;
291
292 hdev->le_scan_type = LE_SCAN_PASSIVE;
293
294 hdev->ssp_debug_mode = 0;
295
296 hci_bdaddr_list_clear(&hdev->le_accept_list);
297 hci_bdaddr_list_clear(&hdev->le_resolv_list);
298
299 return rp->status;
300 }
301
hci_cc_read_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)302 static u8 hci_cc_read_stored_link_key(struct hci_dev *hdev, void *data,
303 struct sk_buff *skb)
304 {
305 struct hci_rp_read_stored_link_key *rp = data;
306 struct hci_cp_read_stored_link_key *sent;
307
308 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
309
310 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY);
311 if (!sent)
312 return rp->status;
313
314 if (!rp->status && sent->read_all == 0x01) {
315 hdev->stored_max_keys = le16_to_cpu(rp->max_keys);
316 hdev->stored_num_keys = le16_to_cpu(rp->num_keys);
317 }
318
319 return rp->status;
320 }
321
hci_cc_delete_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)322 static u8 hci_cc_delete_stored_link_key(struct hci_dev *hdev, void *data,
323 struct sk_buff *skb)
324 {
325 struct hci_rp_delete_stored_link_key *rp = data;
326 u16 num_keys;
327
328 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
329
330 if (rp->status)
331 return rp->status;
332
333 num_keys = le16_to_cpu(rp->num_keys);
334
335 if (num_keys <= hdev->stored_num_keys)
336 hdev->stored_num_keys -= num_keys;
337 else
338 hdev->stored_num_keys = 0;
339
340 return rp->status;
341 }
342
hci_cc_write_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)343 static u8 hci_cc_write_local_name(struct hci_dev *hdev, void *data,
344 struct sk_buff *skb)
345 {
346 struct hci_ev_status *rp = data;
347 void *sent;
348
349 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
350
351 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME);
352 if (!sent)
353 return rp->status;
354
355 hci_dev_lock(hdev);
356
357 if (hci_dev_test_flag(hdev, HCI_MGMT))
358 mgmt_set_local_name_complete(hdev, sent, rp->status);
359 else if (!rp->status)
360 memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH);
361
362 hci_dev_unlock(hdev);
363
364 return rp->status;
365 }
366
hci_cc_read_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)367 static u8 hci_cc_read_local_name(struct hci_dev *hdev, void *data,
368 struct sk_buff *skb)
369 {
370 struct hci_rp_read_local_name *rp = data;
371
372 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
373
374 if (rp->status)
375 return rp->status;
376
377 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
378 hci_dev_test_flag(hdev, HCI_CONFIG))
379 memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH);
380
381 return rp->status;
382 }
383
hci_cc_write_auth_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)384 static u8 hci_cc_write_auth_enable(struct hci_dev *hdev, void *data,
385 struct sk_buff *skb)
386 {
387 struct hci_ev_status *rp = data;
388 void *sent;
389
390 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
391
392 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE);
393 if (!sent)
394 return rp->status;
395
396 hci_dev_lock(hdev);
397
398 if (!rp->status) {
399 __u8 param = *((__u8 *) sent);
400
401 if (param == AUTH_ENABLED)
402 set_bit(HCI_AUTH, &hdev->flags);
403 else
404 clear_bit(HCI_AUTH, &hdev->flags);
405 }
406
407 if (hci_dev_test_flag(hdev, HCI_MGMT))
408 mgmt_auth_enable_complete(hdev, rp->status);
409
410 hci_dev_unlock(hdev);
411
412 return rp->status;
413 }
414
hci_cc_write_encrypt_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)415 static u8 hci_cc_write_encrypt_mode(struct hci_dev *hdev, void *data,
416 struct sk_buff *skb)
417 {
418 struct hci_ev_status *rp = data;
419 __u8 param;
420 void *sent;
421
422 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
423
424 if (rp->status)
425 return rp->status;
426
427 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE);
428 if (!sent)
429 return rp->status;
430
431 param = *((__u8 *) sent);
432
433 if (param)
434 set_bit(HCI_ENCRYPT, &hdev->flags);
435 else
436 clear_bit(HCI_ENCRYPT, &hdev->flags);
437
438 return rp->status;
439 }
440
hci_cc_write_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)441 static u8 hci_cc_write_scan_enable(struct hci_dev *hdev, void *data,
442 struct sk_buff *skb)
443 {
444 struct hci_ev_status *rp = data;
445 __u8 param;
446 void *sent;
447
448 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
449
450 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE);
451 if (!sent)
452 return rp->status;
453
454 param = *((__u8 *) sent);
455
456 hci_dev_lock(hdev);
457
458 if (rp->status) {
459 hdev->discov_timeout = 0;
460 goto done;
461 }
462
463 if (param & SCAN_INQUIRY)
464 set_bit(HCI_ISCAN, &hdev->flags);
465 else
466 clear_bit(HCI_ISCAN, &hdev->flags);
467
468 if (param & SCAN_PAGE)
469 set_bit(HCI_PSCAN, &hdev->flags);
470 else
471 clear_bit(HCI_PSCAN, &hdev->flags);
472
473 done:
474 hci_dev_unlock(hdev);
475
476 return rp->status;
477 }
478
hci_cc_set_event_filter(struct hci_dev * hdev,void * data,struct sk_buff * skb)479 static u8 hci_cc_set_event_filter(struct hci_dev *hdev, void *data,
480 struct sk_buff *skb)
481 {
482 struct hci_ev_status *rp = data;
483 struct hci_cp_set_event_filter *cp;
484 void *sent;
485
486 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
487
488 if (rp->status)
489 return rp->status;
490
491 sent = hci_sent_cmd_data(hdev, HCI_OP_SET_EVENT_FLT);
492 if (!sent)
493 return rp->status;
494
495 cp = (struct hci_cp_set_event_filter *)sent;
496
497 if (cp->flt_type == HCI_FLT_CLEAR_ALL)
498 hci_dev_clear_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
499 else
500 hci_dev_set_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
501
502 return rp->status;
503 }
504
hci_cc_read_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)505 static u8 hci_cc_read_class_of_dev(struct hci_dev *hdev, void *data,
506 struct sk_buff *skb)
507 {
508 struct hci_rp_read_class_of_dev *rp = data;
509
510 if (WARN_ON(!hdev))
511 return HCI_ERROR_UNSPECIFIED;
512
513 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
514
515 if (rp->status)
516 return rp->status;
517
518 memcpy(hdev->dev_class, rp->dev_class, 3);
519
520 bt_dev_dbg(hdev, "class 0x%.2x%.2x%.2x", hdev->dev_class[2],
521 hdev->dev_class[1], hdev->dev_class[0]);
522
523 return rp->status;
524 }
525
hci_cc_write_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)526 static u8 hci_cc_write_class_of_dev(struct hci_dev *hdev, void *data,
527 struct sk_buff *skb)
528 {
529 struct hci_ev_status *rp = data;
530 void *sent;
531
532 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
533
534 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV);
535 if (!sent)
536 return rp->status;
537
538 hci_dev_lock(hdev);
539
540 if (!rp->status)
541 memcpy(hdev->dev_class, sent, 3);
542
543 if (hci_dev_test_flag(hdev, HCI_MGMT))
544 mgmt_set_class_of_dev_complete(hdev, sent, rp->status);
545
546 hci_dev_unlock(hdev);
547
548 return rp->status;
549 }
550
hci_cc_read_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)551 static u8 hci_cc_read_voice_setting(struct hci_dev *hdev, void *data,
552 struct sk_buff *skb)
553 {
554 struct hci_rp_read_voice_setting *rp = data;
555 __u16 setting;
556
557 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
558
559 if (rp->status)
560 return rp->status;
561
562 setting = __le16_to_cpu(rp->voice_setting);
563
564 if (hdev->voice_setting == setting)
565 return rp->status;
566
567 hdev->voice_setting = setting;
568
569 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
570
571 if (hdev->notify)
572 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
573
574 return rp->status;
575 }
576
hci_cc_write_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)577 static u8 hci_cc_write_voice_setting(struct hci_dev *hdev, void *data,
578 struct sk_buff *skb)
579 {
580 struct hci_ev_status *rp = data;
581 __u16 setting;
582 void *sent;
583
584 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
585
586 if (rp->status)
587 return rp->status;
588
589 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING);
590 if (!sent)
591 return rp->status;
592
593 setting = get_unaligned_le16(sent);
594
595 if (hdev->voice_setting == setting)
596 return rp->status;
597
598 hdev->voice_setting = setting;
599
600 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
601
602 if (hdev->notify)
603 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
604
605 return rp->status;
606 }
607
hci_cc_read_num_supported_iac(struct hci_dev * hdev,void * data,struct sk_buff * skb)608 static u8 hci_cc_read_num_supported_iac(struct hci_dev *hdev, void *data,
609 struct sk_buff *skb)
610 {
611 struct hci_rp_read_num_supported_iac *rp = data;
612
613 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
614
615 if (rp->status)
616 return rp->status;
617
618 hdev->num_iac = rp->num_iac;
619
620 bt_dev_dbg(hdev, "num iac %d", hdev->num_iac);
621
622 return rp->status;
623 }
624
hci_cc_write_ssp_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)625 static u8 hci_cc_write_ssp_mode(struct hci_dev *hdev, void *data,
626 struct sk_buff *skb)
627 {
628 struct hci_ev_status *rp = data;
629 struct hci_cp_write_ssp_mode *sent;
630
631 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
632
633 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE);
634 if (!sent)
635 return rp->status;
636
637 hci_dev_lock(hdev);
638
639 if (!rp->status) {
640 if (sent->mode)
641 hdev->features[1][0] |= LMP_HOST_SSP;
642 else
643 hdev->features[1][0] &= ~LMP_HOST_SSP;
644 }
645
646 if (!rp->status) {
647 if (sent->mode)
648 hci_dev_set_flag(hdev, HCI_SSP_ENABLED);
649 else
650 hci_dev_clear_flag(hdev, HCI_SSP_ENABLED);
651 }
652
653 hci_dev_unlock(hdev);
654
655 return rp->status;
656 }
657
hci_cc_write_sc_support(struct hci_dev * hdev,void * data,struct sk_buff * skb)658 static u8 hci_cc_write_sc_support(struct hci_dev *hdev, void *data,
659 struct sk_buff *skb)
660 {
661 struct hci_ev_status *rp = data;
662 struct hci_cp_write_sc_support *sent;
663
664 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
665
666 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT);
667 if (!sent)
668 return rp->status;
669
670 hci_dev_lock(hdev);
671
672 if (!rp->status) {
673 if (sent->support)
674 hdev->features[1][0] |= LMP_HOST_SC;
675 else
676 hdev->features[1][0] &= ~LMP_HOST_SC;
677 }
678
679 if (!hci_dev_test_flag(hdev, HCI_MGMT) && !rp->status) {
680 if (sent->support)
681 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
682 else
683 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
684 }
685
686 hci_dev_unlock(hdev);
687
688 return rp->status;
689 }
690
hci_cc_read_local_version(struct hci_dev * hdev,void * data,struct sk_buff * skb)691 static u8 hci_cc_read_local_version(struct hci_dev *hdev, void *data,
692 struct sk_buff *skb)
693 {
694 struct hci_rp_read_local_version *rp = data;
695
696 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
697
698 if (rp->status)
699 return rp->status;
700
701 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
702 hci_dev_test_flag(hdev, HCI_CONFIG)) {
703 hdev->hci_ver = rp->hci_ver;
704 hdev->hci_rev = __le16_to_cpu(rp->hci_rev);
705 hdev->lmp_ver = rp->lmp_ver;
706 hdev->manufacturer = __le16_to_cpu(rp->manufacturer);
707 hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver);
708 }
709
710 return rp->status;
711 }
712
hci_cc_read_enc_key_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)713 static u8 hci_cc_read_enc_key_size(struct hci_dev *hdev, void *data,
714 struct sk_buff *skb)
715 {
716 struct hci_rp_read_enc_key_size *rp = data;
717 struct hci_conn *conn;
718 u16 handle;
719 u8 status = rp->status;
720
721 bt_dev_dbg(hdev, "status 0x%2.2x", status);
722
723 handle = le16_to_cpu(rp->handle);
724
725 hci_dev_lock(hdev);
726
727 conn = hci_conn_hash_lookup_handle(hdev, handle);
728 if (!conn) {
729 status = 0xFF;
730 goto done;
731 }
732
733 /* While unexpected, the read_enc_key_size command may fail. The most
734 * secure approach is to then assume the key size is 0 to force a
735 * disconnection.
736 */
737 if (status) {
738 bt_dev_err(hdev, "failed to read key size for handle %u",
739 handle);
740 conn->enc_key_size = 0;
741 } else {
742 u8 *key_enc_size = hci_conn_key_enc_size(conn);
743
744 conn->enc_key_size = rp->key_size;
745 status = 0;
746
747 /* Attempt to check if the key size is too small or if it has
748 * been downgraded from the last time it was stored as part of
749 * the link_key.
750 */
751 if (conn->enc_key_size < hdev->min_enc_key_size ||
752 (key_enc_size && conn->enc_key_size < *key_enc_size)) {
753 /* As slave role, the conn->state has been set to
754 * BT_CONNECTED and l2cap conn req might not be received
755 * yet, at this moment the l2cap layer almost does
756 * nothing with the non-zero status.
757 * So we also clear encrypt related bits, and then the
758 * handler of l2cap conn req will get the right secure
759 * state at a later time.
760 */
761 status = HCI_ERROR_AUTH_FAILURE;
762 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
763 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
764 }
765
766 /* Update the key encryption size with the connection one */
767 if (key_enc_size && *key_enc_size != conn->enc_key_size)
768 *key_enc_size = conn->enc_key_size;
769 }
770
771 hci_encrypt_cfm(conn, status);
772
773 done:
774 hci_dev_unlock(hdev);
775
776 return status;
777 }
778
hci_cc_read_local_commands(struct hci_dev * hdev,void * data,struct sk_buff * skb)779 static u8 hci_cc_read_local_commands(struct hci_dev *hdev, void *data,
780 struct sk_buff *skb)
781 {
782 struct hci_rp_read_local_commands *rp = data;
783
784 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
785
786 if (rp->status)
787 return rp->status;
788
789 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
790 hci_dev_test_flag(hdev, HCI_CONFIG))
791 memcpy(hdev->commands, rp->commands, sizeof(hdev->commands));
792
793 return rp->status;
794 }
795
hci_cc_read_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)796 static u8 hci_cc_read_auth_payload_timeout(struct hci_dev *hdev, void *data,
797 struct sk_buff *skb)
798 {
799 struct hci_rp_read_auth_payload_to *rp = data;
800 struct hci_conn *conn;
801
802 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
803
804 if (rp->status)
805 return rp->status;
806
807 hci_dev_lock(hdev);
808
809 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
810 if (conn)
811 conn->auth_payload_timeout = __le16_to_cpu(rp->timeout);
812
813 hci_dev_unlock(hdev);
814
815 return rp->status;
816 }
817
hci_cc_write_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)818 static u8 hci_cc_write_auth_payload_timeout(struct hci_dev *hdev, void *data,
819 struct sk_buff *skb)
820 {
821 struct hci_rp_write_auth_payload_to *rp = data;
822 struct hci_conn *conn;
823 void *sent;
824
825 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
826
827 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO);
828 if (!sent)
829 return rp->status;
830
831 hci_dev_lock(hdev);
832
833 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
834 if (!conn) {
835 rp->status = 0xff;
836 goto unlock;
837 }
838
839 if (!rp->status)
840 conn->auth_payload_timeout = get_unaligned_le16(sent + 2);
841
842 unlock:
843 hci_dev_unlock(hdev);
844
845 return rp->status;
846 }
847
hci_cc_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)848 static u8 hci_cc_read_local_features(struct hci_dev *hdev, void *data,
849 struct sk_buff *skb)
850 {
851 struct hci_rp_read_local_features *rp = data;
852
853 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
854
855 if (rp->status)
856 return rp->status;
857
858 memcpy(hdev->features, rp->features, 8);
859
860 /* Adjust default settings according to features
861 * supported by device. */
862
863 if (hdev->features[0][0] & LMP_3SLOT)
864 hdev->pkt_type |= (HCI_DM3 | HCI_DH3);
865
866 if (hdev->features[0][0] & LMP_5SLOT)
867 hdev->pkt_type |= (HCI_DM5 | HCI_DH5);
868
869 if (hdev->features[0][1] & LMP_HV2) {
870 hdev->pkt_type |= (HCI_HV2);
871 hdev->esco_type |= (ESCO_HV2);
872 }
873
874 if (hdev->features[0][1] & LMP_HV3) {
875 hdev->pkt_type |= (HCI_HV3);
876 hdev->esco_type |= (ESCO_HV3);
877 }
878
879 if (lmp_esco_capable(hdev))
880 hdev->esco_type |= (ESCO_EV3);
881
882 if (hdev->features[0][4] & LMP_EV4)
883 hdev->esco_type |= (ESCO_EV4);
884
885 if (hdev->features[0][4] & LMP_EV5)
886 hdev->esco_type |= (ESCO_EV5);
887
888 if (hdev->features[0][5] & LMP_EDR_ESCO_2M)
889 hdev->esco_type |= (ESCO_2EV3);
890
891 if (hdev->features[0][5] & LMP_EDR_ESCO_3M)
892 hdev->esco_type |= (ESCO_3EV3);
893
894 if (hdev->features[0][5] & LMP_EDR_3S_ESCO)
895 hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5);
896
897 return rp->status;
898 }
899
hci_cc_read_local_ext_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)900 static u8 hci_cc_read_local_ext_features(struct hci_dev *hdev, void *data,
901 struct sk_buff *skb)
902 {
903 struct hci_rp_read_local_ext_features *rp = data;
904
905 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
906
907 if (rp->status)
908 return rp->status;
909
910 if (hdev->max_page < rp->max_page) {
911 if (hci_test_quirk(hdev,
912 HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2))
913 bt_dev_warn(hdev, "broken local ext features page 2");
914 else
915 hdev->max_page = rp->max_page;
916 }
917
918 if (rp->page < HCI_MAX_PAGES)
919 memcpy(hdev->features[rp->page], rp->features, 8);
920
921 return rp->status;
922 }
923
hci_cc_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)924 static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data,
925 struct sk_buff *skb)
926 {
927 struct hci_rp_read_buffer_size *rp = data;
928
929 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
930
931 if (rp->status)
932 return rp->status;
933
934 hdev->acl_mtu = __le16_to_cpu(rp->acl_mtu);
935 hdev->sco_mtu = rp->sco_mtu;
936 hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt);
937 hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt);
938
939 if (hci_test_quirk(hdev, HCI_QUIRK_FIXUP_BUFFER_SIZE)) {
940 hdev->sco_mtu = 64;
941 hdev->sco_pkts = 8;
942 }
943
944 if (!read_voice_setting_capable(hdev))
945 hdev->sco_pkts = 0;
946
947 hdev->acl_cnt = hdev->acl_pkts;
948 hdev->sco_cnt = hdev->sco_pkts;
949
950 BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu,
951 hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts);
952
953 if (!hdev->acl_mtu || !hdev->acl_pkts)
954 return HCI_ERROR_INVALID_PARAMETERS;
955
956 return rp->status;
957 }
958
hci_cc_read_bd_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)959 static u8 hci_cc_read_bd_addr(struct hci_dev *hdev, void *data,
960 struct sk_buff *skb)
961 {
962 struct hci_rp_read_bd_addr *rp = data;
963
964 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
965
966 if (rp->status)
967 return rp->status;
968
969 if (test_bit(HCI_INIT, &hdev->flags))
970 bacpy(&hdev->bdaddr, &rp->bdaddr);
971
972 if (hci_dev_test_flag(hdev, HCI_SETUP))
973 bacpy(&hdev->setup_addr, &rp->bdaddr);
974
975 return rp->status;
976 }
977
hci_cc_read_local_pairing_opts(struct hci_dev * hdev,void * data,struct sk_buff * skb)978 static u8 hci_cc_read_local_pairing_opts(struct hci_dev *hdev, void *data,
979 struct sk_buff *skb)
980 {
981 struct hci_rp_read_local_pairing_opts *rp = data;
982
983 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
984
985 if (rp->status)
986 return rp->status;
987
988 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
989 hci_dev_test_flag(hdev, HCI_CONFIG)) {
990 hdev->pairing_opts = rp->pairing_opts;
991 hdev->max_enc_key_size = rp->max_key_size;
992 }
993
994 return rp->status;
995 }
996
hci_cc_read_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)997 static u8 hci_cc_read_page_scan_activity(struct hci_dev *hdev, void *data,
998 struct sk_buff *skb)
999 {
1000 struct hci_rp_read_page_scan_activity *rp = data;
1001
1002 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1003
1004 if (rp->status)
1005 return rp->status;
1006
1007 if (test_bit(HCI_INIT, &hdev->flags)) {
1008 hdev->page_scan_interval = __le16_to_cpu(rp->interval);
1009 hdev->page_scan_window = __le16_to_cpu(rp->window);
1010 }
1011
1012 return rp->status;
1013 }
1014
hci_cc_write_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)1015 static u8 hci_cc_write_page_scan_activity(struct hci_dev *hdev, void *data,
1016 struct sk_buff *skb)
1017 {
1018 struct hci_ev_status *rp = data;
1019 struct hci_cp_write_page_scan_activity *sent;
1020
1021 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1022
1023 if (rp->status)
1024 return rp->status;
1025
1026 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY);
1027 if (!sent)
1028 return rp->status;
1029
1030 hdev->page_scan_interval = __le16_to_cpu(sent->interval);
1031 hdev->page_scan_window = __le16_to_cpu(sent->window);
1032
1033 return rp->status;
1034 }
1035
hci_cc_read_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1036 static u8 hci_cc_read_page_scan_type(struct hci_dev *hdev, void *data,
1037 struct sk_buff *skb)
1038 {
1039 struct hci_rp_read_page_scan_type *rp = data;
1040
1041 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1042
1043 if (rp->status)
1044 return rp->status;
1045
1046 if (test_bit(HCI_INIT, &hdev->flags))
1047 hdev->page_scan_type = rp->type;
1048
1049 return rp->status;
1050 }
1051
hci_cc_write_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1052 static u8 hci_cc_write_page_scan_type(struct hci_dev *hdev, void *data,
1053 struct sk_buff *skb)
1054 {
1055 struct hci_ev_status *rp = data;
1056 u8 *type;
1057
1058 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1059
1060 if (rp->status)
1061 return rp->status;
1062
1063 type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE);
1064 if (type)
1065 hdev->page_scan_type = *type;
1066
1067 return rp->status;
1068 }
1069
hci_cc_read_clock(struct hci_dev * hdev,void * data,struct sk_buff * skb)1070 static u8 hci_cc_read_clock(struct hci_dev *hdev, void *data,
1071 struct sk_buff *skb)
1072 {
1073 struct hci_rp_read_clock *rp = data;
1074 struct hci_cp_read_clock *cp;
1075 struct hci_conn *conn;
1076
1077 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1078
1079 if (rp->status)
1080 return rp->status;
1081
1082 hci_dev_lock(hdev);
1083
1084 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
1085 if (!cp)
1086 goto unlock;
1087
1088 if (cp->which == 0x00) {
1089 hdev->clock = le32_to_cpu(rp->clock);
1090 goto unlock;
1091 }
1092
1093 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
1094 if (conn) {
1095 conn->clock = le32_to_cpu(rp->clock);
1096 conn->clock_accuracy = le16_to_cpu(rp->accuracy);
1097 }
1098
1099 unlock:
1100 hci_dev_unlock(hdev);
1101 return rp->status;
1102 }
1103
hci_cc_read_inq_rsp_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1104 static u8 hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev, void *data,
1105 struct sk_buff *skb)
1106 {
1107 struct hci_rp_read_inq_rsp_tx_power *rp = data;
1108
1109 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1110
1111 if (rp->status)
1112 return rp->status;
1113
1114 hdev->inq_tx_power = rp->tx_power;
1115
1116 return rp->status;
1117 }
1118
hci_cc_read_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1119 static u8 hci_cc_read_def_err_data_reporting(struct hci_dev *hdev, void *data,
1120 struct sk_buff *skb)
1121 {
1122 struct hci_rp_read_def_err_data_reporting *rp = data;
1123
1124 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1125
1126 if (rp->status)
1127 return rp->status;
1128
1129 hdev->err_data_reporting = rp->err_data_reporting;
1130
1131 return rp->status;
1132 }
1133
hci_cc_write_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1134 static u8 hci_cc_write_def_err_data_reporting(struct hci_dev *hdev, void *data,
1135 struct sk_buff *skb)
1136 {
1137 struct hci_ev_status *rp = data;
1138 struct hci_cp_write_def_err_data_reporting *cp;
1139
1140 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1141
1142 if (rp->status)
1143 return rp->status;
1144
1145 cp = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING);
1146 if (!cp)
1147 return rp->status;
1148
1149 hdev->err_data_reporting = cp->err_data_reporting;
1150
1151 return rp->status;
1152 }
1153
hci_cc_pin_code_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1154 static u8 hci_cc_pin_code_reply(struct hci_dev *hdev, void *data,
1155 struct sk_buff *skb)
1156 {
1157 struct hci_rp_pin_code_reply *rp = data;
1158 struct hci_cp_pin_code_reply *cp;
1159 struct hci_conn *conn;
1160
1161 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1162
1163 hci_dev_lock(hdev);
1164
1165 if (hci_dev_test_flag(hdev, HCI_MGMT))
1166 mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status);
1167
1168 if (rp->status)
1169 goto unlock;
1170
1171 cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY);
1172 if (!cp)
1173 goto unlock;
1174
1175 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
1176 if (conn)
1177 conn->pin_length = cp->pin_len;
1178
1179 unlock:
1180 hci_dev_unlock(hdev);
1181 return rp->status;
1182 }
1183
hci_cc_pin_code_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1184 static u8 hci_cc_pin_code_neg_reply(struct hci_dev *hdev, void *data,
1185 struct sk_buff *skb)
1186 {
1187 struct hci_rp_pin_code_neg_reply *rp = data;
1188
1189 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1190
1191 hci_dev_lock(hdev);
1192
1193 if (hci_dev_test_flag(hdev, HCI_MGMT))
1194 mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr,
1195 rp->status);
1196
1197 hci_dev_unlock(hdev);
1198
1199 return rp->status;
1200 }
1201
hci_cc_le_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1202 static u8 hci_cc_le_read_buffer_size(struct hci_dev *hdev, void *data,
1203 struct sk_buff *skb)
1204 {
1205 struct hci_rp_le_read_buffer_size *rp = data;
1206
1207 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1208
1209 if (rp->status)
1210 return rp->status;
1211
1212 hdev->le_mtu = __le16_to_cpu(rp->le_mtu);
1213 hdev->le_pkts = rp->le_max_pkt;
1214
1215 hdev->le_cnt = hdev->le_pkts;
1216
1217 BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts);
1218
1219 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
1220 return HCI_ERROR_INVALID_PARAMETERS;
1221
1222 return rp->status;
1223 }
1224
hci_cc_le_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)1225 static u8 hci_cc_le_read_local_features(struct hci_dev *hdev, void *data,
1226 struct sk_buff *skb)
1227 {
1228 struct hci_rp_le_read_local_features *rp = data;
1229
1230 BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1231
1232 if (rp->status)
1233 return rp->status;
1234
1235 memcpy(hdev->le_features, rp->features, 8);
1236
1237 return rp->status;
1238 }
1239
hci_cc_le_read_adv_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1240 static u8 hci_cc_le_read_adv_tx_power(struct hci_dev *hdev, void *data,
1241 struct sk_buff *skb)
1242 {
1243 struct hci_rp_le_read_adv_tx_power *rp = data;
1244
1245 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1246
1247 if (rp->status)
1248 return rp->status;
1249
1250 hdev->adv_tx_power = rp->tx_power;
1251
1252 return rp->status;
1253 }
1254
hci_cc_user_confirm_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1255 static u8 hci_cc_user_confirm_reply(struct hci_dev *hdev, void *data,
1256 struct sk_buff *skb)
1257 {
1258 struct hci_rp_user_confirm_reply *rp = data;
1259
1260 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1261
1262 hci_dev_lock(hdev);
1263
1264 if (hci_dev_test_flag(hdev, HCI_MGMT))
1265 mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0,
1266 rp->status);
1267
1268 hci_dev_unlock(hdev);
1269
1270 return rp->status;
1271 }
1272
hci_cc_user_confirm_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1273 static u8 hci_cc_user_confirm_neg_reply(struct hci_dev *hdev, void *data,
1274 struct sk_buff *skb)
1275 {
1276 struct hci_rp_user_confirm_reply *rp = data;
1277
1278 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1279
1280 hci_dev_lock(hdev);
1281
1282 if (hci_dev_test_flag(hdev, HCI_MGMT))
1283 mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr,
1284 ACL_LINK, 0, rp->status);
1285
1286 hci_dev_unlock(hdev);
1287
1288 return rp->status;
1289 }
1290
hci_cc_user_passkey_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1291 static u8 hci_cc_user_passkey_reply(struct hci_dev *hdev, void *data,
1292 struct sk_buff *skb)
1293 {
1294 struct hci_rp_user_confirm_reply *rp = data;
1295
1296 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1297
1298 hci_dev_lock(hdev);
1299
1300 if (hci_dev_test_flag(hdev, HCI_MGMT))
1301 mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK,
1302 0, rp->status);
1303
1304 hci_dev_unlock(hdev);
1305
1306 return rp->status;
1307 }
1308
hci_cc_user_passkey_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1309 static u8 hci_cc_user_passkey_neg_reply(struct hci_dev *hdev, void *data,
1310 struct sk_buff *skb)
1311 {
1312 struct hci_rp_user_confirm_reply *rp = data;
1313
1314 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1315
1316 hci_dev_lock(hdev);
1317
1318 if (hci_dev_test_flag(hdev, HCI_MGMT))
1319 mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr,
1320 ACL_LINK, 0, rp->status);
1321
1322 hci_dev_unlock(hdev);
1323
1324 return rp->status;
1325 }
1326
hci_cc_read_local_oob_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1327 static u8 hci_cc_read_local_oob_data(struct hci_dev *hdev, void *data,
1328 struct sk_buff *skb)
1329 {
1330 struct hci_rp_read_local_oob_data *rp = data;
1331
1332 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1333
1334 return rp->status;
1335 }
1336
hci_cc_read_local_oob_ext_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1337 static u8 hci_cc_read_local_oob_ext_data(struct hci_dev *hdev, void *data,
1338 struct sk_buff *skb)
1339 {
1340 struct hci_rp_read_local_oob_ext_data *rp = data;
1341
1342 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1343
1344 return rp->status;
1345 }
1346
hci_cc_le_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1347 static u8 hci_cc_le_set_random_addr(struct hci_dev *hdev, void *data,
1348 struct sk_buff *skb)
1349 {
1350 struct hci_ev_status *rp = data;
1351 bdaddr_t *sent;
1352
1353 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1354
1355 if (rp->status)
1356 return rp->status;
1357
1358 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR);
1359 if (!sent)
1360 return rp->status;
1361
1362 hci_dev_lock(hdev);
1363
1364 bacpy(&hdev->random_addr, sent);
1365
1366 if (!bacmp(&hdev->rpa, sent)) {
1367 hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED);
1368 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired,
1369 secs_to_jiffies(hdev->rpa_timeout));
1370 }
1371
1372 hci_dev_unlock(hdev);
1373
1374 return rp->status;
1375 }
1376
hci_cc_le_set_default_phy(struct hci_dev * hdev,void * data,struct sk_buff * skb)1377 static u8 hci_cc_le_set_default_phy(struct hci_dev *hdev, void *data,
1378 struct sk_buff *skb)
1379 {
1380 struct hci_ev_status *rp = data;
1381 struct hci_cp_le_set_default_phy *cp;
1382
1383 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1384
1385 if (rp->status)
1386 return rp->status;
1387
1388 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY);
1389 if (!cp)
1390 return rp->status;
1391
1392 hci_dev_lock(hdev);
1393
1394 hdev->le_tx_def_phys = cp->tx_phys;
1395 hdev->le_rx_def_phys = cp->rx_phys;
1396
1397 hci_dev_unlock(hdev);
1398
1399 return rp->status;
1400 }
1401
hci_cc_le_set_adv_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1402 static u8 hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, void *data,
1403 struct sk_buff *skb)
1404 {
1405 struct hci_ev_status *rp = data;
1406 struct hci_cp_le_set_adv_set_rand_addr *cp;
1407 struct adv_info *adv;
1408
1409 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1410
1411 if (rp->status)
1412 return rp->status;
1413
1414 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR);
1415 /* Update only in case the adv instance since handle 0x00 shall be using
1416 * HCI_OP_LE_SET_RANDOM_ADDR since that allows both extended and
1417 * non-extended adverting.
1418 */
1419 if (!cp || !cp->handle)
1420 return rp->status;
1421
1422 hci_dev_lock(hdev);
1423
1424 adv = hci_find_adv_instance(hdev, cp->handle);
1425 if (adv) {
1426 bacpy(&adv->random_addr, &cp->bdaddr);
1427 if (!bacmp(&hdev->rpa, &cp->bdaddr)) {
1428 adv->rpa_expired = false;
1429 queue_delayed_work(hdev->workqueue,
1430 &adv->rpa_expired_cb,
1431 secs_to_jiffies(hdev->rpa_timeout));
1432 }
1433 }
1434
1435 hci_dev_unlock(hdev);
1436
1437 return rp->status;
1438 }
1439
hci_cc_le_remove_adv_set(struct hci_dev * hdev,void * data,struct sk_buff * skb)1440 static u8 hci_cc_le_remove_adv_set(struct hci_dev *hdev, void *data,
1441 struct sk_buff *skb)
1442 {
1443 struct hci_ev_status *rp = data;
1444 u8 *instance;
1445 int err;
1446
1447 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1448
1449 if (rp->status)
1450 return rp->status;
1451
1452 instance = hci_sent_cmd_data(hdev, HCI_OP_LE_REMOVE_ADV_SET);
1453 if (!instance)
1454 return rp->status;
1455
1456 hci_dev_lock(hdev);
1457
1458 err = hci_remove_adv_instance(hdev, *instance);
1459 if (!err)
1460 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), hdev,
1461 *instance);
1462
1463 hci_dev_unlock(hdev);
1464
1465 return rp->status;
1466 }
1467
hci_cc_le_clear_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1468 static u8 hci_cc_le_clear_adv_sets(struct hci_dev *hdev, void *data,
1469 struct sk_buff *skb)
1470 {
1471 struct hci_ev_status *rp = data;
1472 struct adv_info *adv, *n;
1473 int err;
1474
1475 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1476
1477 if (rp->status)
1478 return rp->status;
1479
1480 if (!hci_sent_cmd_data(hdev, HCI_OP_LE_CLEAR_ADV_SETS))
1481 return rp->status;
1482
1483 hci_dev_lock(hdev);
1484
1485 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1486 u8 instance = adv->instance;
1487
1488 err = hci_remove_adv_instance(hdev, instance);
1489 if (!err)
1490 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd),
1491 hdev, instance);
1492 }
1493
1494 hci_dev_unlock(hdev);
1495
1496 return rp->status;
1497 }
1498
hci_cc_le_read_transmit_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1499 static u8 hci_cc_le_read_transmit_power(struct hci_dev *hdev, void *data,
1500 struct sk_buff *skb)
1501 {
1502 struct hci_rp_le_read_transmit_power *rp = data;
1503
1504 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1505
1506 if (rp->status)
1507 return rp->status;
1508
1509 hdev->min_le_tx_power = rp->min_le_tx_power;
1510 hdev->max_le_tx_power = rp->max_le_tx_power;
1511
1512 return rp->status;
1513 }
1514
hci_cc_le_set_privacy_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)1515 static u8 hci_cc_le_set_privacy_mode(struct hci_dev *hdev, void *data,
1516 struct sk_buff *skb)
1517 {
1518 struct hci_ev_status *rp = data;
1519 struct hci_cp_le_set_privacy_mode *cp;
1520 struct hci_conn_params *params;
1521
1522 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1523
1524 if (rp->status)
1525 return rp->status;
1526
1527 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PRIVACY_MODE);
1528 if (!cp)
1529 return rp->status;
1530
1531 hci_dev_lock(hdev);
1532
1533 params = hci_conn_params_lookup(hdev, &cp->bdaddr, cp->bdaddr_type);
1534 if (params)
1535 WRITE_ONCE(params->privacy_mode, cp->mode);
1536
1537 hci_dev_unlock(hdev);
1538
1539 return rp->status;
1540 }
1541
hci_cc_le_set_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1542 static u8 hci_cc_le_set_adv_enable(struct hci_dev *hdev, void *data,
1543 struct sk_buff *skb)
1544 {
1545 struct hci_ev_status *rp = data;
1546 __u8 *sent;
1547
1548 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1549
1550 if (rp->status)
1551 return rp->status;
1552
1553 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE);
1554 if (!sent)
1555 return rp->status;
1556
1557 hci_dev_lock(hdev);
1558
1559 /* If we're doing connection initiation as peripheral. Set a
1560 * timeout in case something goes wrong.
1561 */
1562 if (*sent) {
1563 struct hci_conn *conn;
1564
1565 hci_dev_set_flag(hdev, HCI_LE_ADV);
1566
1567 conn = hci_lookup_le_connect(hdev);
1568 if (conn)
1569 queue_delayed_work(hdev->workqueue,
1570 &conn->le_conn_timeout,
1571 conn->conn_timeout);
1572 } else {
1573 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1574 }
1575
1576 hci_dev_unlock(hdev);
1577
1578 return rp->status;
1579 }
1580
hci_cc_le_set_ext_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1581 static u8 hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev, void *data,
1582 struct sk_buff *skb)
1583 {
1584 struct hci_cp_le_set_ext_adv_enable *cp;
1585 struct hci_cp_ext_adv_set *set;
1586 struct adv_info *adv = NULL, *n;
1587 struct hci_ev_status *rp = data;
1588
1589 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1590
1591 if (rp->status)
1592 return rp->status;
1593
1594 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE);
1595 if (!cp)
1596 return rp->status;
1597
1598 set = (void *)cp->data;
1599
1600 hci_dev_lock(hdev);
1601
1602 if (cp->num_of_sets)
1603 adv = hci_find_adv_instance(hdev, set->handle);
1604
1605 if (cp->enable) {
1606 struct hci_conn *conn;
1607
1608 hci_dev_set_flag(hdev, HCI_LE_ADV);
1609
1610 if (adv)
1611 adv->enabled = true;
1612 else if (!set->handle)
1613 hci_dev_set_flag(hdev, HCI_LE_ADV_0);
1614
1615 conn = hci_lookup_le_connect(hdev);
1616 if (conn)
1617 queue_delayed_work(hdev->workqueue,
1618 &conn->le_conn_timeout,
1619 conn->conn_timeout);
1620 } else {
1621 if (cp->num_of_sets) {
1622 if (adv)
1623 adv->enabled = false;
1624 else if (!set->handle)
1625 hci_dev_clear_flag(hdev, HCI_LE_ADV_0);
1626
1627 /* If just one instance was disabled check if there are
1628 * any other instance enabled before clearing HCI_LE_ADV
1629 */
1630 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1631 list) {
1632 if (adv->enabled)
1633 goto unlock;
1634 }
1635 } else {
1636 /* All instances shall be considered disabled */
1637 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1638 list)
1639 adv->enabled = false;
1640 }
1641
1642 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1643 }
1644
1645 unlock:
1646 hci_dev_unlock(hdev);
1647 return rp->status;
1648 }
1649
hci_cc_le_set_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1650 static u8 hci_cc_le_set_scan_param(struct hci_dev *hdev, void *data,
1651 struct sk_buff *skb)
1652 {
1653 struct hci_cp_le_set_scan_param *cp;
1654 struct hci_ev_status *rp = data;
1655
1656 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1657
1658 if (rp->status)
1659 return rp->status;
1660
1661 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM);
1662 if (!cp)
1663 return rp->status;
1664
1665 hci_dev_lock(hdev);
1666
1667 hdev->le_scan_type = cp->type;
1668
1669 hci_dev_unlock(hdev);
1670
1671 return rp->status;
1672 }
1673
hci_cc_le_set_ext_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1674 static u8 hci_cc_le_set_ext_scan_param(struct hci_dev *hdev, void *data,
1675 struct sk_buff *skb)
1676 {
1677 struct hci_cp_le_set_ext_scan_params *cp;
1678 struct hci_ev_status *rp = data;
1679 struct hci_cp_le_scan_phy_params *phy_param;
1680
1681 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1682
1683 if (rp->status)
1684 return rp->status;
1685
1686 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS);
1687 if (!cp)
1688 return rp->status;
1689
1690 phy_param = (void *)cp->data;
1691
1692 hci_dev_lock(hdev);
1693
1694 hdev->le_scan_type = phy_param->type;
1695
1696 hci_dev_unlock(hdev);
1697
1698 return rp->status;
1699 }
1700
has_pending_adv_report(struct hci_dev * hdev)1701 static bool has_pending_adv_report(struct hci_dev *hdev)
1702 {
1703 struct discovery_state *d = &hdev->discovery;
1704
1705 return bacmp(&d->last_adv_addr, BDADDR_ANY);
1706 }
1707
clear_pending_adv_report(struct hci_dev * hdev)1708 static void clear_pending_adv_report(struct hci_dev *hdev)
1709 {
1710 struct discovery_state *d = &hdev->discovery;
1711
1712 bacpy(&d->last_adv_addr, BDADDR_ANY);
1713 d->last_adv_data_len = 0;
1714 }
1715
store_pending_adv_report(struct hci_dev * hdev,bdaddr_t * bdaddr,u8 bdaddr_type,s8 rssi,u32 flags,u8 * data,u8 len)1716 static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr,
1717 u8 bdaddr_type, s8 rssi, u32 flags,
1718 u8 *data, u8 len)
1719 {
1720 struct discovery_state *d = &hdev->discovery;
1721
1722 if (len > max_adv_len(hdev))
1723 return;
1724
1725 bacpy(&d->last_adv_addr, bdaddr);
1726 d->last_adv_addr_type = bdaddr_type;
1727 d->last_adv_rssi = rssi;
1728 d->last_adv_flags = flags;
1729 memcpy(d->last_adv_data, data, len);
1730 d->last_adv_data_len = len;
1731 }
1732
le_set_scan_enable_complete(struct hci_dev * hdev,u8 enable)1733 static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable)
1734 {
1735 hci_dev_lock(hdev);
1736
1737 switch (enable) {
1738 case LE_SCAN_ENABLE:
1739 hci_dev_set_flag(hdev, HCI_LE_SCAN);
1740 if (hdev->le_scan_type == LE_SCAN_ACTIVE) {
1741 clear_pending_adv_report(hdev);
1742 hci_discovery_set_state(hdev, DISCOVERY_FINDING);
1743 }
1744 break;
1745
1746 case LE_SCAN_DISABLE:
1747 /* We do this here instead of when setting DISCOVERY_STOPPED
1748 * since the latter would potentially require waiting for
1749 * inquiry to stop too.
1750 */
1751 if (has_pending_adv_report(hdev)) {
1752 struct discovery_state *d = &hdev->discovery;
1753
1754 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
1755 d->last_adv_addr_type, NULL,
1756 d->last_adv_rssi, d->last_adv_flags,
1757 d->last_adv_data,
1758 d->last_adv_data_len, NULL, 0, 0);
1759 }
1760
1761 /* Cancel this timer so that we don't try to disable scanning
1762 * when it's already disabled.
1763 */
1764 cancel_delayed_work(&hdev->le_scan_disable);
1765
1766 hci_dev_clear_flag(hdev, HCI_LE_SCAN);
1767
1768 /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we
1769 * interrupted scanning due to a connect request. Mark
1770 * therefore discovery as stopped.
1771 */
1772 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED))
1773 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1774 else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) &&
1775 hdev->discovery.state == DISCOVERY_FINDING)
1776 queue_work(hdev->workqueue, &hdev->reenable_adv_work);
1777
1778 break;
1779
1780 default:
1781 bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d",
1782 enable);
1783 break;
1784 }
1785
1786 hci_dev_unlock(hdev);
1787 }
1788
hci_cc_le_set_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1789 static u8 hci_cc_le_set_scan_enable(struct hci_dev *hdev, void *data,
1790 struct sk_buff *skb)
1791 {
1792 struct hci_cp_le_set_scan_enable *cp;
1793 struct hci_ev_status *rp = data;
1794
1795 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1796
1797 if (rp->status)
1798 return rp->status;
1799
1800 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
1801 if (!cp)
1802 return rp->status;
1803
1804 le_set_scan_enable_complete(hdev, cp->enable);
1805
1806 return rp->status;
1807 }
1808
hci_cc_le_set_ext_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1809 static u8 hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev, void *data,
1810 struct sk_buff *skb)
1811 {
1812 struct hci_cp_le_set_ext_scan_enable *cp;
1813 struct hci_ev_status *rp = data;
1814
1815 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1816
1817 if (rp->status)
1818 return rp->status;
1819
1820 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE);
1821 if (!cp)
1822 return rp->status;
1823
1824 le_set_scan_enable_complete(hdev, cp->enable);
1825
1826 return rp->status;
1827 }
1828
hci_cc_le_read_num_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1829 static u8 hci_cc_le_read_num_adv_sets(struct hci_dev *hdev, void *data,
1830 struct sk_buff *skb)
1831 {
1832 struct hci_rp_le_read_num_supported_adv_sets *rp = data;
1833
1834 bt_dev_dbg(hdev, "status 0x%2.2x No of Adv sets %u", rp->status,
1835 rp->num_of_sets);
1836
1837 if (rp->status)
1838 return rp->status;
1839
1840 hdev->le_num_of_adv_sets = rp->num_of_sets;
1841
1842 return rp->status;
1843 }
1844
hci_cc_le_read_accept_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1845 static u8 hci_cc_le_read_accept_list_size(struct hci_dev *hdev, void *data,
1846 struct sk_buff *skb)
1847 {
1848 struct hci_rp_le_read_accept_list_size *rp = data;
1849
1850 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
1851
1852 if (rp->status)
1853 return rp->status;
1854
1855 hdev->le_accept_list_size = rp->size;
1856
1857 return rp->status;
1858 }
1859
hci_cc_le_clear_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1860 static u8 hci_cc_le_clear_accept_list(struct hci_dev *hdev, void *data,
1861 struct sk_buff *skb)
1862 {
1863 struct hci_ev_status *rp = data;
1864
1865 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1866
1867 if (rp->status)
1868 return rp->status;
1869
1870 hci_dev_lock(hdev);
1871 hci_bdaddr_list_clear(&hdev->le_accept_list);
1872 hci_dev_unlock(hdev);
1873
1874 return rp->status;
1875 }
1876
hci_cc_le_add_to_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1877 static u8 hci_cc_le_add_to_accept_list(struct hci_dev *hdev, void *data,
1878 struct sk_buff *skb)
1879 {
1880 struct hci_cp_le_add_to_accept_list *sent;
1881 struct hci_ev_status *rp = data;
1882
1883 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1884
1885 if (rp->status)
1886 return rp->status;
1887
1888 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
1889 if (!sent)
1890 return rp->status;
1891
1892 hci_dev_lock(hdev);
1893 hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr,
1894 sent->bdaddr_type);
1895 hci_dev_unlock(hdev);
1896
1897 return rp->status;
1898 }
1899
hci_cc_le_del_from_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1900 static u8 hci_cc_le_del_from_accept_list(struct hci_dev *hdev, void *data,
1901 struct sk_buff *skb)
1902 {
1903 struct hci_cp_le_del_from_accept_list *sent;
1904 struct hci_ev_status *rp = data;
1905
1906 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1907
1908 if (rp->status)
1909 return rp->status;
1910
1911 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST);
1912 if (!sent)
1913 return rp->status;
1914
1915 hci_dev_lock(hdev);
1916 hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr,
1917 sent->bdaddr_type);
1918 hci_dev_unlock(hdev);
1919
1920 return rp->status;
1921 }
1922
hci_cc_le_read_supported_states(struct hci_dev * hdev,void * data,struct sk_buff * skb)1923 static u8 hci_cc_le_read_supported_states(struct hci_dev *hdev, void *data,
1924 struct sk_buff *skb)
1925 {
1926 struct hci_rp_le_read_supported_states *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 memcpy(hdev->le_states, rp->le_states, 8);
1934
1935 return rp->status;
1936 }
1937
hci_cc_le_read_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1938 static u8 hci_cc_le_read_def_data_len(struct hci_dev *hdev, void *data,
1939 struct sk_buff *skb)
1940 {
1941 struct hci_rp_le_read_def_data_len *rp = data;
1942
1943 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1944
1945 if (rp->status)
1946 return rp->status;
1947
1948 hdev->le_def_tx_len = le16_to_cpu(rp->tx_len);
1949 hdev->le_def_tx_time = le16_to_cpu(rp->tx_time);
1950
1951 return rp->status;
1952 }
1953
hci_cc_le_write_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1954 static u8 hci_cc_le_write_def_data_len(struct hci_dev *hdev, void *data,
1955 struct sk_buff *skb)
1956 {
1957 struct hci_cp_le_write_def_data_len *sent;
1958 struct hci_ev_status *rp = data;
1959
1960 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1961
1962 if (rp->status)
1963 return rp->status;
1964
1965 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN);
1966 if (!sent)
1967 return rp->status;
1968
1969 hdev->le_def_tx_len = le16_to_cpu(sent->tx_len);
1970 hdev->le_def_tx_time = le16_to_cpu(sent->tx_time);
1971
1972 return rp->status;
1973 }
1974
hci_cc_le_add_to_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1975 static u8 hci_cc_le_add_to_resolv_list(struct hci_dev *hdev, void *data,
1976 struct sk_buff *skb)
1977 {
1978 struct hci_cp_le_add_to_resolv_list *sent;
1979 struct hci_ev_status *rp = data;
1980
1981 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1982
1983 if (rp->status)
1984 return rp->status;
1985
1986 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST);
1987 if (!sent)
1988 return rp->status;
1989
1990 hci_dev_lock(hdev);
1991 hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
1992 sent->bdaddr_type, sent->peer_irk,
1993 sent->local_irk);
1994 hci_dev_unlock(hdev);
1995
1996 return rp->status;
1997 }
1998
hci_cc_le_del_from_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1999 static u8 hci_cc_le_del_from_resolv_list(struct hci_dev *hdev, void *data,
2000 struct sk_buff *skb)
2001 {
2002 struct hci_cp_le_del_from_resolv_list *sent;
2003 struct hci_ev_status *rp = data;
2004
2005 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2006
2007 if (rp->status)
2008 return rp->status;
2009
2010 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST);
2011 if (!sent)
2012 return rp->status;
2013
2014 hci_dev_lock(hdev);
2015 hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
2016 sent->bdaddr_type);
2017 hci_dev_unlock(hdev);
2018
2019 return rp->status;
2020 }
2021
hci_cc_le_clear_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)2022 static u8 hci_cc_le_clear_resolv_list(struct hci_dev *hdev, void *data,
2023 struct sk_buff *skb)
2024 {
2025 struct hci_ev_status *rp = data;
2026
2027 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2028
2029 if (rp->status)
2030 return rp->status;
2031
2032 hci_dev_lock(hdev);
2033 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2034 hci_dev_unlock(hdev);
2035
2036 return rp->status;
2037 }
2038
hci_cc_le_read_resolv_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)2039 static u8 hci_cc_le_read_resolv_list_size(struct hci_dev *hdev, void *data,
2040 struct sk_buff *skb)
2041 {
2042 struct hci_rp_le_read_resolv_list_size *rp = data;
2043
2044 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
2045
2046 if (rp->status)
2047 return rp->status;
2048
2049 hdev->le_resolv_list_size = rp->size;
2050
2051 return rp->status;
2052 }
2053
hci_cc_le_set_addr_resolution_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)2054 static u8 hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev, void *data,
2055 struct sk_buff *skb)
2056 {
2057 struct hci_ev_status *rp = data;
2058 __u8 *sent;
2059
2060 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2061
2062 if (rp->status)
2063 return rp->status;
2064
2065 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE);
2066 if (!sent)
2067 return rp->status;
2068
2069 hci_dev_lock(hdev);
2070
2071 if (*sent)
2072 hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION);
2073 else
2074 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);
2075
2076 hci_dev_unlock(hdev);
2077
2078 return rp->status;
2079 }
2080
hci_cc_le_read_max_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)2081 static u8 hci_cc_le_read_max_data_len(struct hci_dev *hdev, void *data,
2082 struct sk_buff *skb)
2083 {
2084 struct hci_rp_le_read_max_data_len *rp = data;
2085
2086 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2087
2088 if (rp->status)
2089 return rp->status;
2090
2091 hdev->le_max_tx_len = le16_to_cpu(rp->tx_len);
2092 hdev->le_max_tx_time = le16_to_cpu(rp->tx_time);
2093 hdev->le_max_rx_len = le16_to_cpu(rp->rx_len);
2094 hdev->le_max_rx_time = le16_to_cpu(rp->rx_time);
2095
2096 return rp->status;
2097 }
2098
hci_cc_write_le_host_supported(struct hci_dev * hdev,void * data,struct sk_buff * skb)2099 static u8 hci_cc_write_le_host_supported(struct hci_dev *hdev, void *data,
2100 struct sk_buff *skb)
2101 {
2102 struct hci_cp_write_le_host_supported *sent;
2103 struct hci_ev_status *rp = data;
2104
2105 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2106
2107 if (rp->status)
2108 return rp->status;
2109
2110 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED);
2111 if (!sent)
2112 return rp->status;
2113
2114 hci_dev_lock(hdev);
2115
2116 if (sent->le) {
2117 hdev->features[1][0] |= LMP_HOST_LE;
2118 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
2119 } else {
2120 hdev->features[1][0] &= ~LMP_HOST_LE;
2121 hci_dev_clear_flag(hdev, HCI_LE_ENABLED);
2122 hci_dev_clear_flag(hdev, HCI_ADVERTISING);
2123 }
2124
2125 if (sent->simul)
2126 hdev->features[1][0] |= LMP_HOST_LE_BREDR;
2127 else
2128 hdev->features[1][0] &= ~LMP_HOST_LE_BREDR;
2129
2130 hci_dev_unlock(hdev);
2131
2132 return rp->status;
2133 }
2134
hci_cc_set_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2135 static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data,
2136 struct sk_buff *skb)
2137 {
2138 struct hci_cp_le_set_adv_param *cp;
2139 struct hci_ev_status *rp = data;
2140
2141 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2142
2143 if (rp->status)
2144 return rp->status;
2145
2146 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM);
2147 if (!cp)
2148 return rp->status;
2149
2150 hci_dev_lock(hdev);
2151 hdev->adv_addr_type = cp->own_address_type;
2152 hci_dev_unlock(hdev);
2153
2154 return rp->status;
2155 }
2156
hci_cc_read_rssi(struct hci_dev * hdev,void * data,struct sk_buff * skb)2157 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data,
2158 struct sk_buff *skb)
2159 {
2160 struct hci_rp_read_rssi *rp = data;
2161 struct hci_conn *conn;
2162
2163 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2164
2165 if (rp->status)
2166 return rp->status;
2167
2168 hci_dev_lock(hdev);
2169
2170 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2171 if (conn)
2172 conn->rssi = rp->rssi;
2173
2174 hci_dev_unlock(hdev);
2175
2176 return rp->status;
2177 }
2178
hci_cc_read_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)2179 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data,
2180 struct sk_buff *skb)
2181 {
2182 struct hci_cp_read_tx_power *sent;
2183 struct hci_rp_read_tx_power *rp = data;
2184 struct hci_conn *conn;
2185
2186 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2187
2188 if (rp->status)
2189 return rp->status;
2190
2191 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
2192 if (!sent)
2193 return rp->status;
2194
2195 hci_dev_lock(hdev);
2196
2197 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2198 if (!conn)
2199 goto unlock;
2200
2201 switch (sent->type) {
2202 case 0x00:
2203 conn->tx_power = rp->tx_power;
2204 break;
2205 case 0x01:
2206 conn->max_tx_power = rp->tx_power;
2207 break;
2208 }
2209
2210 unlock:
2211 hci_dev_unlock(hdev);
2212 return rp->status;
2213 }
2214
hci_cc_write_ssp_debug_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)2215 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data,
2216 struct sk_buff *skb)
2217 {
2218 struct hci_ev_status *rp = data;
2219 u8 *mode;
2220
2221 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2222
2223 if (rp->status)
2224 return rp->status;
2225
2226 mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
2227 if (mode)
2228 hdev->ssp_debug_mode = *mode;
2229
2230 return rp->status;
2231 }
2232
hci_cs_inquiry(struct hci_dev * hdev,__u8 status)2233 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
2234 {
2235 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2236
2237 if (status)
2238 return;
2239
2240 if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
2241 set_bit(HCI_INQUIRY, &hdev->flags);
2242 }
2243
hci_cs_create_conn(struct hci_dev * hdev,__u8 status)2244 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
2245 {
2246 struct hci_cp_create_conn *cp;
2247 struct hci_conn *conn;
2248
2249 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2250
2251 cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
2252 if (!cp)
2253 return;
2254
2255 hci_dev_lock(hdev);
2256
2257 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2258
2259 bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn);
2260
2261 if (status) {
2262 if (conn && conn->state == BT_CONNECT) {
2263 conn->state = BT_CLOSED;
2264 hci_connect_cfm(conn, status);
2265 hci_conn_del(conn);
2266 }
2267 } else {
2268 if (!conn) {
2269 conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
2270 0, HCI_ROLE_MASTER);
2271 if (IS_ERR(conn))
2272 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
2273 }
2274 }
2275
2276 hci_dev_unlock(hdev);
2277 }
2278
hci_cs_add_sco(struct hci_dev * hdev,__u8 status)2279 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
2280 {
2281 struct hci_cp_add_sco *cp;
2282 struct hci_conn *acl;
2283 struct hci_link *link;
2284 __u16 handle;
2285
2286 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2287
2288 if (!status)
2289 return;
2290
2291 cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
2292 if (!cp)
2293 return;
2294
2295 handle = __le16_to_cpu(cp->handle);
2296
2297 bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
2298
2299 hci_dev_lock(hdev);
2300
2301 acl = hci_conn_hash_lookup_handle(hdev, handle);
2302 if (acl) {
2303 link = list_first_entry_or_null(&acl->link_list,
2304 struct hci_link, list);
2305 if (link && link->conn) {
2306 link->conn->state = BT_CLOSED;
2307
2308 hci_connect_cfm(link->conn, status);
2309 hci_conn_del(link->conn);
2310 }
2311 }
2312
2313 hci_dev_unlock(hdev);
2314 }
2315
hci_cs_auth_requested(struct hci_dev * hdev,__u8 status)2316 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
2317 {
2318 struct hci_cp_auth_requested *cp;
2319 struct hci_conn *conn;
2320
2321 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2322
2323 if (!status)
2324 return;
2325
2326 cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
2327 if (!cp)
2328 return;
2329
2330 hci_dev_lock(hdev);
2331
2332 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2333 if (conn) {
2334 if (conn->state == BT_CONFIG) {
2335 hci_connect_cfm(conn, status);
2336 hci_conn_drop(conn);
2337 }
2338 }
2339
2340 hci_dev_unlock(hdev);
2341 }
2342
hci_cs_set_conn_encrypt(struct hci_dev * hdev,__u8 status)2343 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
2344 {
2345 struct hci_cp_set_conn_encrypt *cp;
2346 struct hci_conn *conn;
2347
2348 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2349
2350 if (!status)
2351 return;
2352
2353 cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
2354 if (!cp)
2355 return;
2356
2357 hci_dev_lock(hdev);
2358
2359 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2360 if (conn) {
2361 if (conn->state == BT_CONFIG) {
2362 hci_connect_cfm(conn, status);
2363 hci_conn_drop(conn);
2364 }
2365 }
2366
2367 hci_dev_unlock(hdev);
2368 }
2369
hci_outgoing_auth_needed(struct hci_dev * hdev,struct hci_conn * conn)2370 static int hci_outgoing_auth_needed(struct hci_dev *hdev,
2371 struct hci_conn *conn)
2372 {
2373 if (conn->state != BT_CONFIG || !conn->out)
2374 return 0;
2375
2376 if (conn->pending_sec_level == BT_SECURITY_SDP)
2377 return 0;
2378
2379 /* Only request authentication for SSP connections or non-SSP
2380 * devices with sec_level MEDIUM or HIGH or if MITM protection
2381 * is requested.
2382 */
2383 if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
2384 conn->pending_sec_level != BT_SECURITY_FIPS &&
2385 conn->pending_sec_level != BT_SECURITY_HIGH &&
2386 conn->pending_sec_level != BT_SECURITY_MEDIUM)
2387 return 0;
2388
2389 return 1;
2390 }
2391
hci_resolve_name(struct hci_dev * hdev,struct inquiry_entry * e)2392 static int hci_resolve_name(struct hci_dev *hdev,
2393 struct inquiry_entry *e)
2394 {
2395 struct hci_cp_remote_name_req cp;
2396
2397 memset(&cp, 0, sizeof(cp));
2398
2399 bacpy(&cp.bdaddr, &e->data.bdaddr);
2400 cp.pscan_rep_mode = e->data.pscan_rep_mode;
2401 cp.pscan_mode = e->data.pscan_mode;
2402 cp.clock_offset = e->data.clock_offset;
2403
2404 return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
2405 }
2406
hci_resolve_next_name(struct hci_dev * hdev)2407 static bool hci_resolve_next_name(struct hci_dev *hdev)
2408 {
2409 struct discovery_state *discov = &hdev->discovery;
2410 struct inquiry_entry *e;
2411
2412 if (list_empty(&discov->resolve))
2413 return false;
2414
2415 /* We should stop if we already spent too much time resolving names. */
2416 if (time_after(jiffies, discov->name_resolve_timeout)) {
2417 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long.");
2418 return false;
2419 }
2420
2421 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2422 if (!e)
2423 return false;
2424
2425 if (hci_resolve_name(hdev, e) == 0) {
2426 e->name_state = NAME_PENDING;
2427 return true;
2428 }
2429
2430 return false;
2431 }
2432
hci_check_pending_name(struct hci_dev * hdev,struct hci_conn * conn,bdaddr_t * bdaddr,u8 * name,u8 name_len)2433 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
2434 bdaddr_t *bdaddr, u8 *name, u8 name_len)
2435 {
2436 struct discovery_state *discov = &hdev->discovery;
2437 struct inquiry_entry *e;
2438
2439 /* Update the mgmt connected state if necessary. Be careful with
2440 * conn objects that exist but are not (yet) connected however.
2441 * Only those in BT_CONFIG or BT_CONNECTED states can be
2442 * considered connected.
2443 */
2444 if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED))
2445 mgmt_device_connected(hdev, conn, name, name_len);
2446
2447 if (discov->state == DISCOVERY_STOPPED)
2448 return;
2449
2450 if (discov->state == DISCOVERY_STOPPING)
2451 goto discov_complete;
2452
2453 if (discov->state != DISCOVERY_RESOLVING)
2454 return;
2455
2456 e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
2457 /* If the device was not found in a list of found devices names of which
2458 * are pending. there is no need to continue resolving a next name as it
2459 * will be done upon receiving another Remote Name Request Complete
2460 * Event */
2461 if (!e)
2462 return;
2463
2464 list_del(&e->list);
2465
2466 e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN;
2467 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi,
2468 name, name_len);
2469
2470 if (hci_resolve_next_name(hdev))
2471 return;
2472
2473 discov_complete:
2474 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2475 }
2476
hci_cs_remote_name_req(struct hci_dev * hdev,__u8 status)2477 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
2478 {
2479 struct hci_cp_remote_name_req *cp;
2480 struct hci_conn *conn;
2481
2482 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2483
2484 /* If successful wait for the name req complete event before
2485 * checking for the need to do authentication */
2486 if (!status)
2487 return;
2488
2489 cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
2490 if (!cp)
2491 return;
2492
2493 hci_dev_lock(hdev);
2494
2495 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2496
2497 if (hci_dev_test_flag(hdev, HCI_MGMT))
2498 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
2499
2500 if (!conn)
2501 goto unlock;
2502
2503 if (!hci_outgoing_auth_needed(hdev, conn))
2504 goto unlock;
2505
2506 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2507 struct hci_cp_auth_requested auth_cp;
2508
2509 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2510
2511 auth_cp.handle = __cpu_to_le16(conn->handle);
2512 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
2513 sizeof(auth_cp), &auth_cp);
2514 }
2515
2516 unlock:
2517 hci_dev_unlock(hdev);
2518 }
2519
hci_cs_read_remote_features(struct hci_dev * hdev,__u8 status)2520 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
2521 {
2522 struct hci_cp_read_remote_features *cp;
2523 struct hci_conn *conn;
2524
2525 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2526
2527 if (!status)
2528 return;
2529
2530 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
2531 if (!cp)
2532 return;
2533
2534 hci_dev_lock(hdev);
2535
2536 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2537 if (conn) {
2538 if (conn->state == BT_CONFIG) {
2539 hci_connect_cfm(conn, status);
2540 hci_conn_drop(conn);
2541 }
2542 }
2543
2544 hci_dev_unlock(hdev);
2545 }
2546
hci_cs_read_remote_ext_features(struct hci_dev * hdev,__u8 status)2547 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
2548 {
2549 struct hci_cp_read_remote_ext_features *cp;
2550 struct hci_conn *conn;
2551
2552 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2553
2554 if (!status)
2555 return;
2556
2557 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
2558 if (!cp)
2559 return;
2560
2561 hci_dev_lock(hdev);
2562
2563 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2564 if (conn) {
2565 if (conn->state == BT_CONFIG) {
2566 hci_connect_cfm(conn, status);
2567 hci_conn_drop(conn);
2568 }
2569 }
2570
2571 hci_dev_unlock(hdev);
2572 }
2573
hci_setup_sync_conn_status(struct hci_dev * hdev,__u16 handle,__u8 status)2574 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle,
2575 __u8 status)
2576 {
2577 struct hci_conn *acl;
2578 struct hci_link *link;
2579
2580 bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status);
2581
2582 hci_dev_lock(hdev);
2583
2584 acl = hci_conn_hash_lookup_handle(hdev, handle);
2585 if (acl) {
2586 link = list_first_entry_or_null(&acl->link_list,
2587 struct hci_link, list);
2588 if (link && link->conn) {
2589 link->conn->state = BT_CLOSED;
2590
2591 hci_connect_cfm(link->conn, status);
2592 hci_conn_del(link->conn);
2593 }
2594 }
2595
2596 hci_dev_unlock(hdev);
2597 }
2598
hci_cs_setup_sync_conn(struct hci_dev * hdev,__u8 status)2599 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2600 {
2601 struct hci_cp_setup_sync_conn *cp;
2602
2603 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2604
2605 if (!status)
2606 return;
2607
2608 cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
2609 if (!cp)
2610 return;
2611
2612 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2613 }
2614
hci_cs_enhanced_setup_sync_conn(struct hci_dev * hdev,__u8 status)2615 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2616 {
2617 struct hci_cp_enhanced_setup_sync_conn *cp;
2618
2619 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2620
2621 if (!status)
2622 return;
2623
2624 cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN);
2625 if (!cp)
2626 return;
2627
2628 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2629 }
2630
hci_cs_sniff_mode(struct hci_dev * hdev,__u8 status)2631 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
2632 {
2633 struct hci_cp_sniff_mode *cp;
2634 struct hci_conn *conn;
2635
2636 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2637
2638 if (!status)
2639 return;
2640
2641 cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
2642 if (!cp)
2643 return;
2644
2645 hci_dev_lock(hdev);
2646
2647 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2648 if (conn) {
2649 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2650
2651 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2652 hci_sco_setup(conn, status);
2653 }
2654
2655 hci_dev_unlock(hdev);
2656 }
2657
hci_cs_exit_sniff_mode(struct hci_dev * hdev,__u8 status)2658 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
2659 {
2660 struct hci_cp_exit_sniff_mode *cp;
2661 struct hci_conn *conn;
2662
2663 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2664
2665 if (!status)
2666 return;
2667
2668 cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
2669 if (!cp)
2670 return;
2671
2672 hci_dev_lock(hdev);
2673
2674 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2675 if (conn) {
2676 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2677
2678 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2679 hci_sco_setup(conn, status);
2680 }
2681
2682 hci_dev_unlock(hdev);
2683 }
2684
hci_cs_disconnect(struct hci_dev * hdev,u8 status)2685 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
2686 {
2687 struct hci_cp_disconnect *cp;
2688 struct hci_conn_params *params;
2689 struct hci_conn *conn;
2690 bool mgmt_conn;
2691
2692 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2693
2694 /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
2695 * otherwise cleanup the connection immediately.
2696 */
2697 if (!status && !hdev->suspended)
2698 return;
2699
2700 cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
2701 if (!cp)
2702 return;
2703
2704 hci_dev_lock(hdev);
2705
2706 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2707 if (!conn)
2708 goto unlock;
2709
2710 if (status && status != HCI_ERROR_UNKNOWN_CONN_ID) {
2711 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2712 conn->dst_type, status);
2713
2714 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
2715 hdev->cur_adv_instance = conn->adv_instance;
2716 hci_enable_advertising(hdev);
2717 }
2718
2719 /* Inform sockets conn is gone before we delete it */
2720 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED);
2721
2722 goto done;
2723 }
2724
2725 /* During suspend, mark connection as closed immediately
2726 * since we might not receive HCI_EV_DISCONN_COMPLETE
2727 */
2728 if (hdev->suspended)
2729 conn->state = BT_CLOSED;
2730
2731 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
2732
2733 if (conn->type == ACL_LINK) {
2734 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
2735 hci_remove_link_key(hdev, &conn->dst);
2736 }
2737
2738 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
2739 if (params) {
2740 switch (params->auto_connect) {
2741 case HCI_AUTO_CONN_LINK_LOSS:
2742 if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT)
2743 break;
2744 fallthrough;
2745
2746 case HCI_AUTO_CONN_DIRECT:
2747 case HCI_AUTO_CONN_ALWAYS:
2748 hci_pend_le_list_del_init(params);
2749 hci_pend_le_list_add(params, &hdev->pend_le_conns);
2750 break;
2751
2752 default:
2753 break;
2754 }
2755 }
2756
2757 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
2758 cp->reason, mgmt_conn);
2759
2760 hci_disconn_cfm(conn, cp->reason);
2761
2762 done:
2763 /* If the disconnection failed for any reason, the upper layer
2764 * does not retry to disconnect in current implementation.
2765 * Hence, we need to do some basic cleanup here and re-enable
2766 * advertising if necessary.
2767 */
2768 hci_conn_del(conn);
2769 unlock:
2770 hci_dev_unlock(hdev);
2771 }
2772
ev_bdaddr_type(struct hci_dev * hdev,u8 type,bool * resolved)2773 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved)
2774 {
2775 /* When using controller based address resolution, then the new
2776 * address types 0x02 and 0x03 are used. These types need to be
2777 * converted back into either public address or random address type
2778 */
2779 switch (type) {
2780 case ADDR_LE_DEV_PUBLIC_RESOLVED:
2781 if (resolved)
2782 *resolved = true;
2783 return ADDR_LE_DEV_PUBLIC;
2784 case ADDR_LE_DEV_RANDOM_RESOLVED:
2785 if (resolved)
2786 *resolved = true;
2787 return ADDR_LE_DEV_RANDOM;
2788 }
2789
2790 if (resolved)
2791 *resolved = false;
2792 return type;
2793 }
2794
cs_le_create_conn(struct hci_dev * hdev,bdaddr_t * peer_addr,u8 peer_addr_type,u8 own_address_type,u8 filter_policy)2795 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
2796 u8 peer_addr_type, u8 own_address_type,
2797 u8 filter_policy)
2798 {
2799 struct hci_conn *conn;
2800
2801 conn = hci_conn_hash_lookup_le(hdev, peer_addr,
2802 peer_addr_type);
2803 if (!conn)
2804 return;
2805
2806 own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL);
2807
2808 /* Store the initiator and responder address information which
2809 * is needed for SMP. These values will not change during the
2810 * lifetime of the connection.
2811 */
2812 conn->init_addr_type = own_address_type;
2813 if (own_address_type == ADDR_LE_DEV_RANDOM)
2814 bacpy(&conn->init_addr, &hdev->random_addr);
2815 else
2816 bacpy(&conn->init_addr, &hdev->bdaddr);
2817
2818 conn->resp_addr_type = peer_addr_type;
2819 bacpy(&conn->resp_addr, peer_addr);
2820 }
2821
hci_cs_le_create_conn(struct hci_dev * hdev,u8 status)2822 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
2823 {
2824 struct hci_cp_le_create_conn *cp;
2825
2826 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2827
2828 /* All connection failure handling is taken care of by the
2829 * hci_conn_failed function which is triggered by the HCI
2830 * request completion callbacks used for connecting.
2831 */
2832 if (status)
2833 return;
2834
2835 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
2836 if (!cp)
2837 return;
2838
2839 hci_dev_lock(hdev);
2840
2841 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2842 cp->own_address_type, cp->filter_policy);
2843
2844 hci_dev_unlock(hdev);
2845 }
2846
hci_cs_le_ext_create_conn(struct hci_dev * hdev,u8 status)2847 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
2848 {
2849 struct hci_cp_le_ext_create_conn *cp;
2850
2851 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2852
2853 /* All connection failure handling is taken care of by the
2854 * hci_conn_failed function which is triggered by the HCI
2855 * request completion callbacks used for connecting.
2856 */
2857 if (status)
2858 return;
2859
2860 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
2861 if (!cp)
2862 return;
2863
2864 hci_dev_lock(hdev);
2865
2866 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2867 cp->own_addr_type, cp->filter_policy);
2868
2869 hci_dev_unlock(hdev);
2870 }
2871
hci_cs_le_read_remote_features(struct hci_dev * hdev,u8 status)2872 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
2873 {
2874 struct hci_cp_le_read_remote_features *cp;
2875 struct hci_conn *conn;
2876
2877 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2878
2879 if (!status)
2880 return;
2881
2882 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
2883 if (!cp)
2884 return;
2885
2886 hci_dev_lock(hdev);
2887
2888 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2889 if (conn && conn->state == BT_CONFIG)
2890 hci_connect_cfm(conn, status);
2891
2892 hci_dev_unlock(hdev);
2893 }
2894
hci_cs_le_start_enc(struct hci_dev * hdev,u8 status)2895 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
2896 {
2897 struct hci_cp_le_start_enc *cp;
2898 struct hci_conn *conn;
2899
2900 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2901
2902 if (!status)
2903 return;
2904
2905 hci_dev_lock(hdev);
2906
2907 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
2908 if (!cp)
2909 goto unlock;
2910
2911 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2912 if (!conn)
2913 goto unlock;
2914
2915 if (conn->state != BT_CONNECTED)
2916 goto unlock;
2917
2918 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
2919 hci_conn_drop(conn);
2920
2921 unlock:
2922 hci_dev_unlock(hdev);
2923 }
2924
hci_cs_switch_role(struct hci_dev * hdev,u8 status)2925 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
2926 {
2927 struct hci_cp_switch_role *cp;
2928 struct hci_conn *conn;
2929
2930 BT_DBG("%s status 0x%2.2x", hdev->name, status);
2931
2932 if (!status)
2933 return;
2934
2935 cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
2936 if (!cp)
2937 return;
2938
2939 hci_dev_lock(hdev);
2940
2941 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2942 if (conn)
2943 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
2944
2945 hci_dev_unlock(hdev);
2946 }
2947
hci_inquiry_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)2948 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data,
2949 struct sk_buff *skb)
2950 {
2951 struct hci_ev_status *ev = data;
2952 struct discovery_state *discov = &hdev->discovery;
2953 struct inquiry_entry *e;
2954
2955 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
2956
2957 if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
2958 return;
2959
2960 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
2961 wake_up_bit(&hdev->flags, HCI_INQUIRY);
2962
2963 if (!hci_dev_test_flag(hdev, HCI_MGMT))
2964 return;
2965
2966 hci_dev_lock(hdev);
2967
2968 if (discov->state != DISCOVERY_FINDING)
2969 goto unlock;
2970
2971 if (list_empty(&discov->resolve)) {
2972 /* When BR/EDR inquiry is active and no LE scanning is in
2973 * progress, then change discovery state to indicate completion.
2974 *
2975 * When running LE scanning and BR/EDR inquiry simultaneously
2976 * and the LE scan already finished, then change the discovery
2977 * state to indicate completion.
2978 */
2979 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2980 !hci_test_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY))
2981 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2982 goto unlock;
2983 }
2984
2985 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2986 if (e && hci_resolve_name(hdev, e) == 0) {
2987 e->name_state = NAME_PENDING;
2988 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
2989 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION;
2990 } else {
2991 /* When BR/EDR inquiry is active and no LE scanning is in
2992 * progress, then change discovery state to indicate completion.
2993 *
2994 * When running LE scanning and BR/EDR inquiry simultaneously
2995 * and the LE scan already finished, then change the discovery
2996 * state to indicate completion.
2997 */
2998 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2999 !hci_test_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY))
3000 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3001 }
3002
3003 unlock:
3004 hci_dev_unlock(hdev);
3005 }
3006
hci_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)3007 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata,
3008 struct sk_buff *skb)
3009 {
3010 struct hci_ev_inquiry_result *ev = edata;
3011 struct inquiry_data data;
3012 int i;
3013
3014 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT,
3015 flex_array_size(ev, info, ev->num)))
3016 return;
3017
3018 bt_dev_dbg(hdev, "num %d", ev->num);
3019
3020 if (!ev->num)
3021 return;
3022
3023 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
3024 return;
3025
3026 hci_dev_lock(hdev);
3027
3028 for (i = 0; i < ev->num; i++) {
3029 struct inquiry_info *info = &ev->info[i];
3030 u32 flags;
3031
3032 bacpy(&data.bdaddr, &info->bdaddr);
3033 data.pscan_rep_mode = info->pscan_rep_mode;
3034 data.pscan_period_mode = info->pscan_period_mode;
3035 data.pscan_mode = info->pscan_mode;
3036 memcpy(data.dev_class, info->dev_class, 3);
3037 data.clock_offset = info->clock_offset;
3038 data.rssi = HCI_RSSI_INVALID;
3039 data.ssp_mode = 0x00;
3040
3041 flags = hci_inquiry_cache_update(hdev, &data, false);
3042
3043 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3044 info->dev_class, HCI_RSSI_INVALID,
3045 flags, NULL, 0, NULL, 0, 0);
3046 }
3047
3048 hci_dev_unlock(hdev);
3049 }
3050
hci_read_enc_key_size(struct hci_dev * hdev,struct hci_conn * conn)3051 static int hci_read_enc_key_size(struct hci_dev *hdev, struct hci_conn *conn)
3052 {
3053 struct hci_cp_read_enc_key_size cp;
3054 u8 *key_enc_size = hci_conn_key_enc_size(conn);
3055
3056 if (!read_key_size_capable(hdev)) {
3057 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3058 return -EOPNOTSUPP;
3059 }
3060
3061 bt_dev_dbg(hdev, "hcon %p", conn);
3062
3063 memset(&cp, 0, sizeof(cp));
3064 cp.handle = cpu_to_le16(conn->handle);
3065
3066 /* If the key enc_size is already known, use it as conn->enc_key_size,
3067 * otherwise use hdev->min_enc_key_size so the likes of
3068 * l2cap_check_enc_key_size don't fail while waiting for
3069 * HCI_OP_READ_ENC_KEY_SIZE response.
3070 */
3071 if (key_enc_size && *key_enc_size)
3072 conn->enc_key_size = *key_enc_size;
3073 else
3074 conn->enc_key_size = hdev->min_enc_key_size;
3075
3076 return hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE, sizeof(cp), &cp);
3077 }
3078
hci_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3079 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
3080 struct sk_buff *skb)
3081 {
3082 struct hci_ev_conn_complete *ev = data;
3083 struct hci_conn *conn;
3084 u8 status = ev->status;
3085
3086 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3087
3088 hci_dev_lock(hdev);
3089
3090 /* Check for existing connection:
3091 *
3092 * 1. If it doesn't exist then it must be receiver/slave role.
3093 * 2. If it does exist confirm that it is connecting/BT_CONNECT in case
3094 * of initiator/master role since there could be a collision where
3095 * either side is attempting to connect or something like a fuzzing
3096 * testing is trying to play tricks to destroy the hcon object before
3097 * it even attempts to connect (e.g. hcon->state == BT_OPEN).
3098 */
3099 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
3100 if (!conn ||
3101 (conn->role == HCI_ROLE_MASTER && conn->state != BT_CONNECT)) {
3102 /* In case of error status and there is no connection pending
3103 * just unlock as there is nothing to cleanup.
3104 */
3105 if (ev->status)
3106 goto unlock;
3107
3108 /* Connection may not exist if auto-connected. Check the bredr
3109 * allowlist to see if this device is allowed to auto connect.
3110 * If link is an ACL type, create a connection class
3111 * automatically.
3112 *
3113 * Auto-connect will only occur if the event filter is
3114 * programmed with a given address. Right now, event filter is
3115 * only used during suspend.
3116 */
3117 if (ev->link_type == ACL_LINK &&
3118 hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
3119 &ev->bdaddr,
3120 BDADDR_BREDR)) {
3121 conn = hci_conn_add_unset(hdev, ev->link_type,
3122 &ev->bdaddr, 0,
3123 HCI_ROLE_SLAVE);
3124 if (IS_ERR(conn)) {
3125 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3126 goto unlock;
3127 }
3128 } else {
3129 if (ev->link_type != SCO_LINK)
3130 goto unlock;
3131
3132 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK,
3133 &ev->bdaddr);
3134 if (!conn)
3135 goto unlock;
3136
3137 conn->type = SCO_LINK;
3138 }
3139 }
3140
3141 /* The HCI_Connection_Complete event is only sent once per connection.
3142 * Processing it more than once per connection can corrupt kernel memory.
3143 *
3144 * As the connection handle is set here for the first time, it indicates
3145 * whether the connection is already set up.
3146 */
3147 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
3148 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
3149 goto unlock;
3150 }
3151
3152 if (!status) {
3153 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
3154 if (status)
3155 goto done;
3156
3157 if (conn->type == ACL_LINK) {
3158 conn->state = BT_CONFIG;
3159 hci_conn_hold(conn);
3160
3161 if (!conn->out && !hci_conn_ssp_enabled(conn) &&
3162 !hci_find_link_key(hdev, &ev->bdaddr))
3163 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
3164 else
3165 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3166 } else
3167 conn->state = BT_CONNECTED;
3168
3169 hci_debugfs_create_conn(conn);
3170 hci_conn_add_sysfs(conn);
3171
3172 if (test_bit(HCI_AUTH, &hdev->flags))
3173 set_bit(HCI_CONN_AUTH, &conn->flags);
3174
3175 if (test_bit(HCI_ENCRYPT, &hdev->flags))
3176 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3177
3178 /* "Link key request" completed ahead of "connect request" completes */
3179 if (ev->encr_mode == 1 && !test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3180 ev->link_type == ACL_LINK) {
3181 struct link_key *key;
3182
3183 key = hci_find_link_key(hdev, &ev->bdaddr);
3184 if (key) {
3185 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3186 hci_read_enc_key_size(hdev, conn);
3187 hci_encrypt_cfm(conn, ev->status);
3188 }
3189 }
3190
3191 /* Get remote features */
3192 if (conn->type == ACL_LINK) {
3193 struct hci_cp_read_remote_features cp;
3194 cp.handle = ev->handle;
3195 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
3196 sizeof(cp), &cp);
3197
3198 hci_update_scan(hdev);
3199 }
3200
3201 /* Set packet type for incoming connection */
3202 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
3203 struct hci_cp_change_conn_ptype cp;
3204 cp.handle = ev->handle;
3205 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3206 hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
3207 &cp);
3208 }
3209 }
3210
3211 if (conn->type == ACL_LINK)
3212 hci_sco_setup(conn, ev->status);
3213
3214 done:
3215 if (status) {
3216 hci_conn_failed(conn, status);
3217 } else if (ev->link_type == SCO_LINK) {
3218 switch (conn->setting & SCO_AIRMODE_MASK) {
3219 case SCO_AIRMODE_CVSD:
3220 if (hdev->notify)
3221 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
3222 break;
3223 }
3224
3225 hci_connect_cfm(conn, status);
3226 }
3227
3228 unlock:
3229 hci_dev_unlock(hdev);
3230 }
3231
hci_reject_conn(struct hci_dev * hdev,bdaddr_t * bdaddr)3232 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
3233 {
3234 struct hci_cp_reject_conn_req cp;
3235
3236 bacpy(&cp.bdaddr, bdaddr);
3237 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
3238 hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
3239 }
3240
hci_conn_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3241 static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
3242 struct sk_buff *skb)
3243 {
3244 struct hci_ev_conn_request *ev = data;
3245 int mask = hdev->link_mode;
3246 struct inquiry_entry *ie;
3247 struct hci_conn *conn;
3248 __u8 flags = 0;
3249
3250 bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type);
3251
3252 /* Reject incoming connection from device with same BD ADDR against
3253 * CVE-2020-26555
3254 */
3255 if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
3256 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
3257 &ev->bdaddr);
3258 hci_reject_conn(hdev, &ev->bdaddr);
3259 return;
3260 }
3261
3262 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
3263 &flags);
3264
3265 if (!(mask & HCI_LM_ACCEPT)) {
3266 hci_reject_conn(hdev, &ev->bdaddr);
3267 return;
3268 }
3269
3270 hci_dev_lock(hdev);
3271
3272 if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
3273 BDADDR_BREDR)) {
3274 hci_reject_conn(hdev, &ev->bdaddr);
3275 goto unlock;
3276 }
3277
3278 /* Require HCI_CONNECTABLE or an accept list entry to accept the
3279 * connection. These features are only touched through mgmt so
3280 * only do the checks if HCI_MGMT is set.
3281 */
3282 if (hci_dev_test_flag(hdev, HCI_MGMT) &&
3283 !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
3284 !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
3285 BDADDR_BREDR)) {
3286 hci_reject_conn(hdev, &ev->bdaddr);
3287 goto unlock;
3288 }
3289
3290 /* Connection accepted */
3291
3292 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3293 if (ie)
3294 memcpy(ie->data.dev_class, ev->dev_class, 3);
3295
3296 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
3297 &ev->bdaddr);
3298 if (!conn) {
3299 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr, 0,
3300 HCI_ROLE_SLAVE);
3301 if (IS_ERR(conn)) {
3302 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3303 goto unlock;
3304 }
3305 }
3306
3307 memcpy(conn->dev_class, ev->dev_class, 3);
3308
3309 hci_dev_unlock(hdev);
3310
3311 if (ev->link_type == ACL_LINK ||
3312 (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
3313 struct hci_cp_accept_conn_req cp;
3314 conn->state = BT_CONNECT;
3315
3316 bacpy(&cp.bdaddr, &ev->bdaddr);
3317
3318 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
3319 cp.role = 0x00; /* Become central */
3320 else
3321 cp.role = 0x01; /* Remain peripheral */
3322
3323 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
3324 } else if (!(flags & HCI_PROTO_DEFER)) {
3325 struct hci_cp_accept_sync_conn_req cp;
3326 conn->state = BT_CONNECT;
3327
3328 bacpy(&cp.bdaddr, &ev->bdaddr);
3329 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3330
3331 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
3332 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
3333 cp.max_latency = cpu_to_le16(0xffff);
3334 cp.content_format = cpu_to_le16(hdev->voice_setting);
3335 cp.retrans_effort = 0xff;
3336
3337 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
3338 &cp);
3339 } else {
3340 conn->state = BT_CONNECT2;
3341 hci_connect_cfm(conn, 0);
3342 }
3343
3344 return;
3345 unlock:
3346 hci_dev_unlock(hdev);
3347 }
3348
hci_to_mgmt_reason(u8 err)3349 static u8 hci_to_mgmt_reason(u8 err)
3350 {
3351 switch (err) {
3352 case HCI_ERROR_CONNECTION_TIMEOUT:
3353 return MGMT_DEV_DISCONN_TIMEOUT;
3354 case HCI_ERROR_REMOTE_USER_TERM:
3355 case HCI_ERROR_REMOTE_LOW_RESOURCES:
3356 case HCI_ERROR_REMOTE_POWER_OFF:
3357 return MGMT_DEV_DISCONN_REMOTE;
3358 case HCI_ERROR_LOCAL_HOST_TERM:
3359 return MGMT_DEV_DISCONN_LOCAL_HOST;
3360 default:
3361 return MGMT_DEV_DISCONN_UNKNOWN;
3362 }
3363 }
3364
hci_disconn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3365 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
3366 struct sk_buff *skb)
3367 {
3368 struct hci_ev_disconn_complete *ev = data;
3369 u8 reason;
3370 struct hci_conn_params *params;
3371 struct hci_conn *conn;
3372 bool mgmt_connected;
3373
3374 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3375
3376 hci_dev_lock(hdev);
3377
3378 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3379 if (!conn)
3380 goto unlock;
3381
3382 if (ev->status) {
3383 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
3384 conn->dst_type, ev->status);
3385 goto unlock;
3386 }
3387
3388 conn->state = BT_CLOSED;
3389
3390 mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
3391
3392 if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
3393 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
3394 else
3395 reason = hci_to_mgmt_reason(ev->reason);
3396
3397 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
3398 reason, mgmt_connected);
3399
3400 if (conn->type == ACL_LINK) {
3401 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
3402 hci_remove_link_key(hdev, &conn->dst);
3403
3404 hci_update_scan(hdev);
3405 }
3406
3407 /* Re-enable passive scanning if disconnected device is marked
3408 * as auto-connectable.
3409 */
3410 if (conn->type == LE_LINK) {
3411 params = hci_conn_params_lookup(hdev, &conn->dst,
3412 conn->dst_type);
3413 if (params) {
3414 switch (params->auto_connect) {
3415 case HCI_AUTO_CONN_LINK_LOSS:
3416 if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
3417 break;
3418 fallthrough;
3419
3420 case HCI_AUTO_CONN_DIRECT:
3421 case HCI_AUTO_CONN_ALWAYS:
3422 hci_pend_le_list_del_init(params);
3423 hci_pend_le_list_add(params,
3424 &hdev->pend_le_conns);
3425 hci_update_passive_scan(hdev);
3426 break;
3427
3428 default:
3429 break;
3430 }
3431 }
3432 }
3433
3434 hci_disconn_cfm(conn, ev->reason);
3435
3436 /* Re-enable advertising if necessary, since it might
3437 * have been disabled by the connection. From the
3438 * HCI_LE_Set_Advertise_Enable command description in
3439 * the core specification (v4.0):
3440 * "The Controller shall continue advertising until the Host
3441 * issues an LE_Set_Advertise_Enable command with
3442 * Advertising_Enable set to 0x00 (Advertising is disabled)
3443 * or until a connection is created or until the Advertising
3444 * is timed out due to Directed Advertising."
3445 */
3446 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
3447 hdev->cur_adv_instance = conn->adv_instance;
3448 hci_enable_advertising(hdev);
3449 }
3450
3451 hci_conn_del(conn);
3452
3453 unlock:
3454 hci_dev_unlock(hdev);
3455 }
3456
hci_auth_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3457 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data,
3458 struct sk_buff *skb)
3459 {
3460 struct hci_ev_auth_complete *ev = data;
3461 struct hci_conn *conn;
3462
3463 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3464
3465 hci_dev_lock(hdev);
3466
3467 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3468 if (!conn)
3469 goto unlock;
3470
3471 if (!ev->status) {
3472 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3473 set_bit(HCI_CONN_AUTH, &conn->flags);
3474 conn->sec_level = conn->pending_sec_level;
3475 } else {
3476 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3477 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3478
3479 mgmt_auth_failed(conn, ev->status);
3480 }
3481
3482 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3483
3484 if (conn->state == BT_CONFIG) {
3485 if (!ev->status && hci_conn_ssp_enabled(conn)) {
3486 struct hci_cp_set_conn_encrypt cp;
3487 cp.handle = ev->handle;
3488 cp.encrypt = 0x01;
3489 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3490 &cp);
3491 } else {
3492 conn->state = BT_CONNECTED;
3493 hci_connect_cfm(conn, ev->status);
3494 hci_conn_drop(conn);
3495 }
3496 } else {
3497 hci_auth_cfm(conn, ev->status);
3498
3499 hci_conn_hold(conn);
3500 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3501 hci_conn_drop(conn);
3502 }
3503
3504 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
3505 if (!ev->status) {
3506 struct hci_cp_set_conn_encrypt cp;
3507 cp.handle = ev->handle;
3508 cp.encrypt = 0x01;
3509 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3510 &cp);
3511 } else {
3512 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3513 hci_encrypt_cfm(conn, ev->status);
3514 }
3515 }
3516
3517 unlock:
3518 hci_dev_unlock(hdev);
3519 }
3520
hci_remote_name_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3521 static void hci_remote_name_evt(struct hci_dev *hdev, void *data,
3522 struct sk_buff *skb)
3523 {
3524 struct hci_ev_remote_name *ev = data;
3525 struct hci_conn *conn;
3526
3527 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3528
3529 hci_dev_lock(hdev);
3530
3531 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3532
3533 if (!hci_dev_test_flag(hdev, HCI_MGMT))
3534 goto check_auth;
3535
3536 if (ev->status == 0)
3537 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
3538 strnlen(ev->name, HCI_MAX_NAME_LENGTH));
3539 else
3540 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
3541
3542 check_auth:
3543 if (!conn)
3544 goto unlock;
3545
3546 if (!hci_outgoing_auth_needed(hdev, conn))
3547 goto unlock;
3548
3549 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
3550 struct hci_cp_auth_requested cp;
3551
3552 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
3553
3554 cp.handle = __cpu_to_le16(conn->handle);
3555 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
3556 }
3557
3558 unlock:
3559 hci_dev_unlock(hdev);
3560 }
3561
hci_encrypt_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3562 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data,
3563 struct sk_buff *skb)
3564 {
3565 struct hci_ev_encrypt_change *ev = data;
3566 struct hci_conn *conn;
3567
3568 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3569
3570 hci_dev_lock(hdev);
3571
3572 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3573 if (!conn)
3574 goto unlock;
3575
3576 if (!ev->status) {
3577 if (ev->encrypt) {
3578 /* Encryption implies authentication */
3579 set_bit(HCI_CONN_AUTH, &conn->flags);
3580 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3581 conn->sec_level = conn->pending_sec_level;
3582
3583 /* P-256 authentication key implies FIPS */
3584 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
3585 set_bit(HCI_CONN_FIPS, &conn->flags);
3586
3587 if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
3588 conn->type == LE_LINK)
3589 set_bit(HCI_CONN_AES_CCM, &conn->flags);
3590 } else {
3591 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
3592 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
3593 }
3594 }
3595
3596 /* We should disregard the current RPA and generate a new one
3597 * whenever the encryption procedure fails.
3598 */
3599 if (ev->status && conn->type == LE_LINK) {
3600 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
3601 hci_adv_instances_set_rpa_expired(hdev, true);
3602 }
3603
3604 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3605
3606 /* Check link security requirements are met */
3607 if (!hci_conn_check_link_mode(conn))
3608 ev->status = HCI_ERROR_AUTH_FAILURE;
3609
3610 if (ev->status && conn->state == BT_CONNECTED) {
3611 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3612 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3613
3614 /* Notify upper layers so they can cleanup before
3615 * disconnecting.
3616 */
3617 hci_encrypt_cfm(conn, ev->status);
3618 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
3619 hci_conn_drop(conn);
3620 goto unlock;
3621 }
3622
3623 /* Try reading the encryption key size for encrypted ACL links */
3624 if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
3625 if (hci_read_enc_key_size(hdev, conn))
3626 goto notify;
3627
3628 goto unlock;
3629 }
3630
3631 /* We skip the WRITE_AUTH_PAYLOAD_TIMEOUT for ATS2851 based controllers
3632 * to avoid unexpected SMP command errors when pairing.
3633 */
3634 if (hci_test_quirk(hdev, HCI_QUIRK_BROKEN_WRITE_AUTH_PAYLOAD_TIMEOUT))
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 != CIS_LINK ||
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_cc_le_read_all_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)3914 static u8 hci_cc_le_read_all_local_features(struct hci_dev *hdev, void *data,
3915 struct sk_buff *skb)
3916 {
3917 struct hci_rp_le_read_all_local_features *rp = data;
3918
3919 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3920
3921 if (rp->status)
3922 return rp->status;
3923
3924 memcpy(hdev->le_features, rp->features, 248);
3925
3926 return rp->status;
3927 }
3928
hci_cs_le_create_big(struct hci_dev * hdev,u8 status)3929 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status)
3930 {
3931 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3932 }
3933
hci_cs_le_read_all_remote_features(struct hci_dev * hdev,u8 status)3934 static void hci_cs_le_read_all_remote_features(struct hci_dev *hdev, u8 status)
3935 {
3936 struct hci_cp_le_read_remote_features *cp;
3937 struct hci_conn *conn;
3938
3939 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3940
3941 if (!status)
3942 return;
3943
3944 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_ALL_REMOTE_FEATURES);
3945 if (!cp)
3946 return;
3947
3948 hci_dev_lock(hdev);
3949
3950 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
3951 if (conn && conn->state == BT_CONFIG)
3952 hci_connect_cfm(conn, status);
3953
3954 hci_dev_unlock(hdev);
3955 }
3956
hci_cc_set_per_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)3957 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data,
3958 struct sk_buff *skb)
3959 {
3960 struct hci_ev_status *rp = data;
3961 struct hci_cp_le_set_per_adv_params *cp;
3962
3963 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3964
3965 if (rp->status)
3966 return rp->status;
3967
3968 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS);
3969 if (!cp)
3970 return rp->status;
3971
3972 /* TODO: set the conn state */
3973 return rp->status;
3974 }
3975
hci_cc_le_set_per_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)3976 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data,
3977 struct sk_buff *skb)
3978 {
3979 struct hci_ev_status *rp = data;
3980 struct hci_cp_le_set_per_adv_enable *cp;
3981 struct adv_info *adv = NULL, *n;
3982 u8 per_adv_cnt = 0;
3983
3984 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3985
3986 if (rp->status)
3987 return rp->status;
3988
3989 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE);
3990 if (!cp)
3991 return rp->status;
3992
3993 hci_dev_lock(hdev);
3994
3995 adv = hci_find_adv_instance(hdev, cp->handle);
3996
3997 if (cp->enable) {
3998 hci_dev_set_flag(hdev, HCI_LE_PER_ADV);
3999
4000 if (adv)
4001 adv->periodic_enabled = true;
4002 } else {
4003 if (adv)
4004 adv->periodic_enabled = false;
4005
4006 /* If just one instance was disabled check if there are
4007 * any other instance enabled before clearing HCI_LE_PER_ADV.
4008 * The current periodic adv instance will be marked as
4009 * disabled once extended advertising is also disabled.
4010 */
4011 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
4012 list) {
4013 if (adv->periodic && adv->enabled)
4014 per_adv_cnt++;
4015 }
4016
4017 if (per_adv_cnt > 1)
4018 goto unlock;
4019
4020 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV);
4021 }
4022
4023 unlock:
4024 hci_dev_unlock(hdev);
4025
4026 return rp->status;
4027 }
4028
4029 #define HCI_CC_VL(_op, _func, _min, _max) \
4030 { \
4031 .op = _op, \
4032 .func = _func, \
4033 .min_len = _min, \
4034 .max_len = _max, \
4035 }
4036
4037 #define HCI_CC(_op, _func, _len) \
4038 HCI_CC_VL(_op, _func, _len, _len)
4039
4040 #define HCI_CC_STATUS(_op, _func) \
4041 HCI_CC(_op, _func, sizeof(struct hci_ev_status))
4042
4043 static const struct hci_cc {
4044 u16 op;
4045 u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
4046 u16 min_len;
4047 u16 max_len;
4048 } hci_cc_table[] = {
4049 HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel),
4050 HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq),
4051 HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq),
4052 HCI_CC(HCI_OP_REMOTE_NAME_REQ_CANCEL, hci_cc_remote_name_req_cancel,
4053 sizeof(struct hci_rp_remote_name_req_cancel)),
4054 HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery,
4055 sizeof(struct hci_rp_role_discovery)),
4056 HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy,
4057 sizeof(struct hci_rp_read_link_policy)),
4058 HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy,
4059 sizeof(struct hci_rp_write_link_policy)),
4060 HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy,
4061 sizeof(struct hci_rp_read_def_link_policy)),
4062 HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY,
4063 hci_cc_write_def_link_policy),
4064 HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset),
4065 HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key,
4066 sizeof(struct hci_rp_read_stored_link_key)),
4067 HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key,
4068 sizeof(struct hci_rp_delete_stored_link_key)),
4069 HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name),
4070 HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name,
4071 sizeof(struct hci_rp_read_local_name)),
4072 HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable),
4073 HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
4074 HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable),
4075 HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter),
4076 HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev,
4077 sizeof(struct hci_rp_read_class_of_dev)),
4078 HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev),
4079 HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting,
4080 sizeof(struct hci_rp_read_voice_setting)),
4081 HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting),
4082 HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac,
4083 sizeof(struct hci_rp_read_num_supported_iac)),
4084 HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode),
4085 HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support),
4086 HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout,
4087 sizeof(struct hci_rp_read_auth_payload_to)),
4088 HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout,
4089 sizeof(struct hci_rp_write_auth_payload_to)),
4090 HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version,
4091 sizeof(struct hci_rp_read_local_version)),
4092 HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands,
4093 sizeof(struct hci_rp_read_local_commands)),
4094 HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features,
4095 sizeof(struct hci_rp_read_local_features)),
4096 HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features,
4097 sizeof(struct hci_rp_read_local_ext_features)),
4098 HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size,
4099 sizeof(struct hci_rp_read_buffer_size)),
4100 HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr,
4101 sizeof(struct hci_rp_read_bd_addr)),
4102 HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts,
4103 sizeof(struct hci_rp_read_local_pairing_opts)),
4104 HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity,
4105 sizeof(struct hci_rp_read_page_scan_activity)),
4106 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
4107 hci_cc_write_page_scan_activity),
4108 HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type,
4109 sizeof(struct hci_rp_read_page_scan_type)),
4110 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type),
4111 HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock,
4112 sizeof(struct hci_rp_read_clock)),
4113 HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size,
4114 sizeof(struct hci_rp_read_enc_key_size)),
4115 HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power,
4116 sizeof(struct hci_rp_read_inq_rsp_tx_power)),
4117 HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4118 hci_cc_read_def_err_data_reporting,
4119 sizeof(struct hci_rp_read_def_err_data_reporting)),
4120 HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4121 hci_cc_write_def_err_data_reporting),
4122 HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply,
4123 sizeof(struct hci_rp_pin_code_reply)),
4124 HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply,
4125 sizeof(struct hci_rp_pin_code_neg_reply)),
4126 HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data,
4127 sizeof(struct hci_rp_read_local_oob_data)),
4128 HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data,
4129 sizeof(struct hci_rp_read_local_oob_ext_data)),
4130 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size,
4131 sizeof(struct hci_rp_le_read_buffer_size)),
4132 HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features,
4133 sizeof(struct hci_rp_le_read_local_features)),
4134 HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power,
4135 sizeof(struct hci_rp_le_read_adv_tx_power)),
4136 HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply,
4137 sizeof(struct hci_rp_user_confirm_reply)),
4138 HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply,
4139 sizeof(struct hci_rp_user_confirm_reply)),
4140 HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply,
4141 sizeof(struct hci_rp_user_confirm_reply)),
4142 HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply,
4143 sizeof(struct hci_rp_user_confirm_reply)),
4144 HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr),
4145 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable),
4146 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param),
4147 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable),
4148 HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4149 hci_cc_le_read_accept_list_size,
4150 sizeof(struct hci_rp_le_read_accept_list_size)),
4151 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list),
4152 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST,
4153 hci_cc_le_add_to_accept_list),
4154 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
4155 hci_cc_le_del_from_accept_list),
4156 HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states,
4157 sizeof(struct hci_rp_le_read_supported_states)),
4158 HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len,
4159 sizeof(struct hci_rp_le_read_def_data_len)),
4160 HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN,
4161 hci_cc_le_write_def_data_len),
4162 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST,
4163 hci_cc_le_add_to_resolv_list),
4164 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST,
4165 hci_cc_le_del_from_resolv_list),
4166 HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST,
4167 hci_cc_le_clear_resolv_list),
4168 HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size,
4169 sizeof(struct hci_rp_le_read_resolv_list_size)),
4170 HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
4171 hci_cc_le_set_addr_resolution_enable),
4172 HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len,
4173 sizeof(struct hci_rp_le_read_max_data_len)),
4174 HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED,
4175 hci_cc_write_le_host_supported),
4176 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param),
4177 HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi,
4178 sizeof(struct hci_rp_read_rssi)),
4179 HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power,
4180 sizeof(struct hci_rp_read_tx_power)),
4181 HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode),
4182 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS,
4183 hci_cc_le_set_ext_scan_param),
4184 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE,
4185 hci_cc_le_set_ext_scan_enable),
4186 HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy),
4187 HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4188 hci_cc_le_read_num_adv_sets,
4189 sizeof(struct hci_rp_le_read_num_supported_adv_sets)),
4190 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE,
4191 hci_cc_le_set_ext_adv_enable),
4192 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
4193 hci_cc_le_set_adv_set_random_addr),
4194 HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set),
4195 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets),
4196 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param),
4197 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE,
4198 hci_cc_le_set_per_adv_enable),
4199 HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power,
4200 sizeof(struct hci_rp_le_read_transmit_power)),
4201 HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode),
4202 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2,
4203 sizeof(struct hci_rp_le_read_buffer_size_v2)),
4204 HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params,
4205 sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE),
4206 HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path,
4207 sizeof(struct hci_rp_le_setup_iso_path)),
4208 HCI_CC(HCI_OP_LE_READ_ALL_LOCAL_FEATURES,
4209 hci_cc_le_read_all_local_features,
4210 sizeof(struct hci_rp_le_read_all_local_features)),
4211 };
4212
hci_cc_func(struct hci_dev * hdev,const struct hci_cc * cc,struct sk_buff * skb)4213 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc,
4214 struct sk_buff *skb)
4215 {
4216 void *data;
4217
4218 if (skb->len < cc->min_len) {
4219 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u",
4220 cc->op, skb->len, cc->min_len);
4221 return HCI_ERROR_UNSPECIFIED;
4222 }
4223
4224 /* Just warn if the length is over max_len size it still be possible to
4225 * partially parse the cc so leave to callback to decide if that is
4226 * acceptable.
4227 */
4228 if (skb->len > cc->max_len)
4229 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u",
4230 cc->op, skb->len, cc->max_len);
4231
4232 data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len);
4233 if (!data)
4234 return HCI_ERROR_UNSPECIFIED;
4235
4236 return cc->func(hdev, data, skb);
4237 }
4238
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)4239 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
4240 struct sk_buff *skb, u16 *opcode, u8 *status,
4241 hci_req_complete_t *req_complete,
4242 hci_req_complete_skb_t *req_complete_skb)
4243 {
4244 struct hci_ev_cmd_complete *ev = data;
4245 int i;
4246
4247 *opcode = __le16_to_cpu(ev->opcode);
4248
4249 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4250
4251 for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) {
4252 if (hci_cc_table[i].op == *opcode) {
4253 *status = hci_cc_func(hdev, &hci_cc_table[i], skb);
4254 break;
4255 }
4256 }
4257
4258 if (i == ARRAY_SIZE(hci_cc_table)) {
4259 if (!skb->len) {
4260 bt_dev_err(hdev, "Unexpected cc 0x%4.4x with no status",
4261 *opcode);
4262 *status = HCI_ERROR_UNSPECIFIED;
4263 return;
4264 }
4265
4266 /* Unknown opcode, assume byte 0 contains the status, so
4267 * that e.g. __hci_cmd_sync() properly returns errors
4268 * for vendor specific commands send by HCI drivers.
4269 * If a vendor doesn't actually follow this convention we may
4270 * need to introduce a vendor CC table in order to properly set
4271 * the status.
4272 */
4273 *status = skb->data[0];
4274 }
4275
4276 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4277
4278 hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
4279 req_complete_skb);
4280
4281 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4282 bt_dev_err(hdev,
4283 "unexpected event for opcode 0x%4.4x", *opcode);
4284 return;
4285 }
4286
4287 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4288 queue_work(hdev->workqueue, &hdev->cmd_work);
4289 }
4290
hci_cs_le_create_cis(struct hci_dev * hdev,u8 status)4291 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
4292 {
4293 struct hci_cp_le_create_cis *cp;
4294 bool pending = false;
4295 int i;
4296
4297 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4298
4299 if (!status)
4300 return;
4301
4302 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
4303 if (!cp)
4304 return;
4305
4306 hci_dev_lock(hdev);
4307
4308 /* Remove connection if command failed */
4309 for (i = 0; i < cp->num_cis; i++) {
4310 struct hci_conn *conn;
4311 u16 handle;
4312
4313 handle = __le16_to_cpu(cp->cis[i].cis_handle);
4314
4315 conn = hci_conn_hash_lookup_handle(hdev, handle);
4316 if (conn) {
4317 if (test_and_clear_bit(HCI_CONN_CREATE_CIS,
4318 &conn->flags))
4319 pending = true;
4320 conn->state = BT_CLOSED;
4321 hci_connect_cfm(conn, status);
4322 hci_conn_del(conn);
4323 }
4324 }
4325 cp->num_cis = 0;
4326
4327 if (pending)
4328 hci_le_create_cis_pending(hdev);
4329
4330 hci_dev_unlock(hdev);
4331 }
4332
4333 #define HCI_CS(_op, _func) \
4334 { \
4335 .op = _op, \
4336 .func = _func, \
4337 }
4338
4339 static const struct hci_cs {
4340 u16 op;
4341 void (*func)(struct hci_dev *hdev, __u8 status);
4342 } hci_cs_table[] = {
4343 HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry),
4344 HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn),
4345 HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect),
4346 HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco),
4347 HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested),
4348 HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt),
4349 HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req),
4350 HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features),
4351 HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES,
4352 hci_cs_read_remote_ext_features),
4353 HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn),
4354 HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN,
4355 hci_cs_enhanced_setup_sync_conn),
4356 HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode),
4357 HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode),
4358 HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role),
4359 HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn),
4360 HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features),
4361 HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc),
4362 HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn),
4363 HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis),
4364 HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big),
4365 HCI_CS(HCI_OP_LE_READ_ALL_REMOTE_FEATURES,
4366 hci_cs_le_read_all_remote_features),
4367 };
4368
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)4369 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data,
4370 struct sk_buff *skb, u16 *opcode, u8 *status,
4371 hci_req_complete_t *req_complete,
4372 hci_req_complete_skb_t *req_complete_skb)
4373 {
4374 struct hci_ev_cmd_status *ev = data;
4375 int i;
4376
4377 *opcode = __le16_to_cpu(ev->opcode);
4378 *status = ev->status;
4379
4380 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4381
4382 for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) {
4383 if (hci_cs_table[i].op == *opcode) {
4384 hci_cs_table[i].func(hdev, ev->status);
4385 break;
4386 }
4387 }
4388
4389 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4390
4391 /* Indicate request completion if the command failed. Also, if
4392 * we're not waiting for a special event and we get a success
4393 * command status we should try to flag the request as completed
4394 * (since for this kind of commands there will not be a command
4395 * complete event).
4396 */
4397 if (ev->status || (hdev->req_skb && !hci_skb_event(hdev->req_skb))) {
4398 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
4399 req_complete_skb);
4400 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4401 bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x",
4402 *opcode);
4403 return;
4404 }
4405 }
4406
4407 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4408 queue_work(hdev->workqueue, &hdev->cmd_work);
4409 }
4410
hci_hardware_error_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4411 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data,
4412 struct sk_buff *skb)
4413 {
4414 struct hci_ev_hardware_error *ev = data;
4415
4416 bt_dev_dbg(hdev, "code 0x%2.2x", ev->code);
4417
4418 hdev->hw_error_code = ev->code;
4419
4420 queue_work(hdev->req_workqueue, &hdev->error_reset);
4421 }
4422
hci_role_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4423 static void hci_role_change_evt(struct hci_dev *hdev, void *data,
4424 struct sk_buff *skb)
4425 {
4426 struct hci_ev_role_change *ev = data;
4427 struct hci_conn *conn;
4428
4429 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4430
4431 hci_dev_lock(hdev);
4432
4433 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4434 if (conn) {
4435 if (!ev->status)
4436 conn->role = ev->role;
4437
4438 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
4439
4440 hci_role_switch_cfm(conn, ev->status, ev->role);
4441 }
4442
4443 hci_dev_unlock(hdev);
4444 }
4445
hci_num_comp_pkts_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4446 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data,
4447 struct sk_buff *skb)
4448 {
4449 struct hci_ev_num_comp_pkts *ev = data;
4450 int i;
4451
4452 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS,
4453 flex_array_size(ev, handles, ev->num)))
4454 return;
4455
4456 bt_dev_dbg(hdev, "num %d", ev->num);
4457
4458 hci_dev_lock(hdev);
4459
4460 for (i = 0; i < ev->num; i++) {
4461 struct hci_comp_pkts_info *info = &ev->handles[i];
4462 struct hci_conn *conn;
4463 __u16 handle, count;
4464 unsigned int i;
4465
4466 handle = __le16_to_cpu(info->handle);
4467 count = __le16_to_cpu(info->count);
4468
4469 conn = hci_conn_hash_lookup_handle(hdev, handle);
4470 if (!conn)
4471 continue;
4472
4473 /* Check if there is really enough packets outstanding before
4474 * attempting to decrease the sent counter otherwise it could
4475 * underflow..
4476 */
4477 if (conn->sent >= count) {
4478 conn->sent -= count;
4479 } else {
4480 bt_dev_warn(hdev, "hcon %p sent %u < count %u",
4481 conn, conn->sent, count);
4482 conn->sent = 0;
4483 }
4484
4485 for (i = 0; i < count; ++i)
4486 hci_conn_tx_dequeue(conn);
4487
4488 switch (conn->type) {
4489 case ACL_LINK:
4490 hdev->acl_cnt += count;
4491 if (hdev->acl_cnt > hdev->acl_pkts)
4492 hdev->acl_cnt = hdev->acl_pkts;
4493 break;
4494
4495 case LE_LINK:
4496 if (hdev->le_pkts) {
4497 hdev->le_cnt += count;
4498 if (hdev->le_cnt > hdev->le_pkts)
4499 hdev->le_cnt = hdev->le_pkts;
4500 } else {
4501 hdev->acl_cnt += count;
4502 if (hdev->acl_cnt > hdev->acl_pkts)
4503 hdev->acl_cnt = hdev->acl_pkts;
4504 }
4505 break;
4506
4507 case SCO_LINK:
4508 case ESCO_LINK:
4509 hdev->sco_cnt += count;
4510 if (hdev->sco_cnt > hdev->sco_pkts)
4511 hdev->sco_cnt = hdev->sco_pkts;
4512
4513 break;
4514
4515 case CIS_LINK:
4516 case BIS_LINK:
4517 case PA_LINK:
4518 hdev->iso_cnt += count;
4519 if (hdev->iso_cnt > hdev->iso_pkts)
4520 hdev->iso_cnt = hdev->iso_pkts;
4521 break;
4522
4523 default:
4524 bt_dev_err(hdev, "unknown type %d conn %p",
4525 conn->type, conn);
4526 break;
4527 }
4528 }
4529
4530 queue_work(hdev->workqueue, &hdev->tx_work);
4531
4532 hci_dev_unlock(hdev);
4533 }
4534
hci_mode_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4535 static void hci_mode_change_evt(struct hci_dev *hdev, void *data,
4536 struct sk_buff *skb)
4537 {
4538 struct hci_ev_mode_change *ev = data;
4539 struct hci_conn *conn;
4540
4541 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4542
4543 hci_dev_lock(hdev);
4544
4545 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4546 if (conn) {
4547 conn->mode = ev->mode;
4548
4549 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
4550 &conn->flags)) {
4551 if (conn->mode == HCI_CM_ACTIVE)
4552 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4553 else
4554 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4555 }
4556
4557 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
4558 hci_sco_setup(conn, ev->status);
4559 }
4560
4561 hci_dev_unlock(hdev);
4562 }
4563
hci_pin_code_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4564 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data,
4565 struct sk_buff *skb)
4566 {
4567 struct hci_ev_pin_code_req *ev = data;
4568 struct hci_conn *conn;
4569
4570 bt_dev_dbg(hdev, "");
4571
4572 hci_dev_lock(hdev);
4573
4574 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4575 if (!conn)
4576 goto unlock;
4577
4578 if (conn->state == BT_CONNECTED) {
4579 hci_conn_hold(conn);
4580 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
4581 hci_conn_drop(conn);
4582 }
4583
4584 if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
4585 !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
4586 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
4587 sizeof(ev->bdaddr), &ev->bdaddr);
4588 } else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4589 u8 secure;
4590
4591 if (conn->pending_sec_level == BT_SECURITY_HIGH)
4592 secure = 1;
4593 else
4594 secure = 0;
4595
4596 mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
4597 }
4598
4599 unlock:
4600 hci_dev_unlock(hdev);
4601 }
4602
conn_set_key(struct hci_conn * conn,u8 key_type,u8 pin_len)4603 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
4604 {
4605 if (key_type == HCI_LK_CHANGED_COMBINATION)
4606 return;
4607
4608 conn->pin_length = pin_len;
4609 conn->key_type = key_type;
4610
4611 switch (key_type) {
4612 case HCI_LK_LOCAL_UNIT:
4613 case HCI_LK_REMOTE_UNIT:
4614 case HCI_LK_DEBUG_COMBINATION:
4615 return;
4616 case HCI_LK_COMBINATION:
4617 if (pin_len == 16)
4618 conn->pending_sec_level = BT_SECURITY_HIGH;
4619 else
4620 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4621 break;
4622 case HCI_LK_UNAUTH_COMBINATION_P192:
4623 case HCI_LK_UNAUTH_COMBINATION_P256:
4624 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4625 break;
4626 case HCI_LK_AUTH_COMBINATION_P192:
4627 conn->pending_sec_level = BT_SECURITY_HIGH;
4628 break;
4629 case HCI_LK_AUTH_COMBINATION_P256:
4630 conn->pending_sec_level = BT_SECURITY_FIPS;
4631 break;
4632 }
4633 }
4634
hci_link_key_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4635 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data,
4636 struct sk_buff *skb)
4637 {
4638 struct hci_ev_link_key_req *ev = data;
4639 struct hci_cp_link_key_reply cp;
4640 struct hci_conn *conn;
4641 struct link_key *key;
4642
4643 bt_dev_dbg(hdev, "");
4644
4645 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4646 return;
4647
4648 hci_dev_lock(hdev);
4649
4650 key = hci_find_link_key(hdev, &ev->bdaddr);
4651 if (!key) {
4652 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr);
4653 goto not_found;
4654 }
4655
4656 bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr);
4657
4658 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4659 if (conn) {
4660 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4661
4662 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
4663 key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
4664 conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
4665 bt_dev_dbg(hdev, "ignoring unauthenticated key");
4666 goto not_found;
4667 }
4668
4669 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
4670 (conn->pending_sec_level == BT_SECURITY_HIGH ||
4671 conn->pending_sec_level == BT_SECURITY_FIPS)) {
4672 bt_dev_dbg(hdev, "ignoring key unauthenticated for high security");
4673 goto not_found;
4674 }
4675
4676 conn_set_key(conn, key->type, key->pin_len);
4677 }
4678
4679 bacpy(&cp.bdaddr, &ev->bdaddr);
4680 memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
4681
4682 hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
4683
4684 hci_dev_unlock(hdev);
4685
4686 return;
4687
4688 not_found:
4689 hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
4690 hci_dev_unlock(hdev);
4691 }
4692
hci_link_key_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4693 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data,
4694 struct sk_buff *skb)
4695 {
4696 struct hci_ev_link_key_notify *ev = data;
4697 struct hci_conn *conn;
4698 struct link_key *key;
4699 bool persistent;
4700 u8 pin_len = 0;
4701
4702 bt_dev_dbg(hdev, "");
4703
4704 hci_dev_lock(hdev);
4705
4706 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4707 if (!conn)
4708 goto unlock;
4709
4710 /* Ignore NULL link key against CVE-2020-26555 */
4711 if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
4712 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
4713 &ev->bdaddr);
4714 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
4715 hci_conn_drop(conn);
4716 goto unlock;
4717 }
4718
4719 hci_conn_hold(conn);
4720 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
4721 hci_conn_drop(conn);
4722
4723 set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4724 conn_set_key(conn, ev->key_type, conn->pin_length);
4725
4726 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4727 goto unlock;
4728
4729 key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
4730 ev->key_type, pin_len, &persistent);
4731 if (!key)
4732 goto unlock;
4733
4734 /* Update connection information since adding the key will have
4735 * fixed up the type in the case of changed combination keys.
4736 */
4737 if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
4738 conn_set_key(conn, key->type, key->pin_len);
4739
4740 mgmt_new_link_key(hdev, key, persistent);
4741
4742 /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
4743 * is set. If it's not set simply remove the key from the kernel
4744 * list (we've still notified user space about it but with
4745 * store_hint being 0).
4746 */
4747 if (key->type == HCI_LK_DEBUG_COMBINATION &&
4748 !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
4749 list_del_rcu(&key->list);
4750 kfree_rcu(key, rcu);
4751 goto unlock;
4752 }
4753
4754 if (persistent)
4755 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4756 else
4757 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4758
4759 unlock:
4760 hci_dev_unlock(hdev);
4761 }
4762
hci_clock_offset_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4763 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data,
4764 struct sk_buff *skb)
4765 {
4766 struct hci_ev_clock_offset *ev = data;
4767 struct hci_conn *conn;
4768
4769 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4770
4771 hci_dev_lock(hdev);
4772
4773 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4774 if (conn && !ev->status) {
4775 struct inquiry_entry *ie;
4776
4777 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4778 if (ie) {
4779 ie->data.clock_offset = ev->clock_offset;
4780 ie->timestamp = jiffies;
4781 }
4782 }
4783
4784 hci_dev_unlock(hdev);
4785 }
4786
hci_pkt_type_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4787 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data,
4788 struct sk_buff *skb)
4789 {
4790 struct hci_ev_pkt_type_change *ev = data;
4791 struct hci_conn *conn;
4792
4793 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4794
4795 hci_dev_lock(hdev);
4796
4797 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4798 if (conn && !ev->status)
4799 conn->pkt_type = __le16_to_cpu(ev->pkt_type);
4800
4801 hci_dev_unlock(hdev);
4802 }
4803
hci_pscan_rep_mode_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4804 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data,
4805 struct sk_buff *skb)
4806 {
4807 struct hci_ev_pscan_rep_mode *ev = data;
4808 struct inquiry_entry *ie;
4809
4810 bt_dev_dbg(hdev, "");
4811
4812 hci_dev_lock(hdev);
4813
4814 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
4815 if (ie) {
4816 ie->data.pscan_rep_mode = ev->pscan_rep_mode;
4817 ie->timestamp = jiffies;
4818 }
4819
4820 hci_dev_unlock(hdev);
4821 }
4822
hci_inquiry_result_with_rssi_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)4823 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
4824 struct sk_buff *skb)
4825 {
4826 struct hci_ev_inquiry_result_rssi *ev = edata;
4827 struct inquiry_data data;
4828 int i;
4829
4830 bt_dev_dbg(hdev, "num_rsp %d", ev->num);
4831
4832 if (!ev->num)
4833 return;
4834
4835 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
4836 return;
4837
4838 hci_dev_lock(hdev);
4839
4840 if (skb->len == array_size(ev->num,
4841 sizeof(struct inquiry_info_rssi_pscan))) {
4842 struct inquiry_info_rssi_pscan *info;
4843
4844 for (i = 0; i < ev->num; i++) {
4845 u32 flags;
4846
4847 info = hci_ev_skb_pull(hdev, skb,
4848 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4849 sizeof(*info));
4850 if (!info) {
4851 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4852 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4853 goto unlock;
4854 }
4855
4856 bacpy(&data.bdaddr, &info->bdaddr);
4857 data.pscan_rep_mode = info->pscan_rep_mode;
4858 data.pscan_period_mode = info->pscan_period_mode;
4859 data.pscan_mode = info->pscan_mode;
4860 memcpy(data.dev_class, info->dev_class, 3);
4861 data.clock_offset = info->clock_offset;
4862 data.rssi = info->rssi;
4863 data.ssp_mode = 0x00;
4864
4865 flags = hci_inquiry_cache_update(hdev, &data, false);
4866
4867 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4868 info->dev_class, info->rssi,
4869 flags, NULL, 0, NULL, 0, 0);
4870 }
4871 } else if (skb->len == array_size(ev->num,
4872 sizeof(struct inquiry_info_rssi))) {
4873 struct inquiry_info_rssi *info;
4874
4875 for (i = 0; i < ev->num; i++) {
4876 u32 flags;
4877
4878 info = hci_ev_skb_pull(hdev, skb,
4879 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4880 sizeof(*info));
4881 if (!info) {
4882 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4883 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4884 goto unlock;
4885 }
4886
4887 bacpy(&data.bdaddr, &info->bdaddr);
4888 data.pscan_rep_mode = info->pscan_rep_mode;
4889 data.pscan_period_mode = info->pscan_period_mode;
4890 data.pscan_mode = 0x00;
4891 memcpy(data.dev_class, info->dev_class, 3);
4892 data.clock_offset = info->clock_offset;
4893 data.rssi = info->rssi;
4894 data.ssp_mode = 0x00;
4895
4896 flags = hci_inquiry_cache_update(hdev, &data, false);
4897
4898 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4899 info->dev_class, info->rssi,
4900 flags, NULL, 0, NULL, 0, 0);
4901 }
4902 } else {
4903 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4904 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4905 }
4906 unlock:
4907 hci_dev_unlock(hdev);
4908 }
4909
hci_remote_ext_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4910 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data,
4911 struct sk_buff *skb)
4912 {
4913 struct hci_ev_remote_ext_features *ev = data;
4914 struct hci_conn *conn;
4915
4916 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4917
4918 hci_dev_lock(hdev);
4919
4920 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4921 if (!conn)
4922 goto unlock;
4923
4924 if (ev->page < HCI_MAX_PAGES)
4925 memcpy(conn->features[ev->page], ev->features, 8);
4926
4927 if (!ev->status && ev->page == 0x01) {
4928 struct inquiry_entry *ie;
4929
4930 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4931 if (ie)
4932 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4933
4934 if (ev->features[0] & LMP_HOST_SSP) {
4935 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4936 } else {
4937 /* It is mandatory by the Bluetooth specification that
4938 * Extended Inquiry Results are only used when Secure
4939 * Simple Pairing is enabled, but some devices violate
4940 * this.
4941 *
4942 * To make these devices work, the internal SSP
4943 * enabled flag needs to be cleared if the remote host
4944 * features do not indicate SSP support */
4945 clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4946 }
4947
4948 if (ev->features[0] & LMP_HOST_SC)
4949 set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
4950 }
4951
4952 if (conn->state != BT_CONFIG)
4953 goto unlock;
4954
4955 if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
4956 struct hci_cp_remote_name_req cp;
4957 memset(&cp, 0, sizeof(cp));
4958 bacpy(&cp.bdaddr, &conn->dst);
4959 cp.pscan_rep_mode = 0x02;
4960 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
4961 } else {
4962 mgmt_device_connected(hdev, conn, NULL, 0);
4963 }
4964
4965 if (!hci_outgoing_auth_needed(hdev, conn)) {
4966 conn->state = BT_CONNECTED;
4967 hci_connect_cfm(conn, ev->status);
4968 hci_conn_drop(conn);
4969 }
4970
4971 unlock:
4972 hci_dev_unlock(hdev);
4973 }
4974
hci_sync_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4975 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
4976 struct sk_buff *skb)
4977 {
4978 struct hci_ev_sync_conn_complete *ev = data;
4979 struct hci_conn *conn;
4980 u8 status = ev->status;
4981
4982 switch (ev->link_type) {
4983 case SCO_LINK:
4984 case ESCO_LINK:
4985 break;
4986 default:
4987 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
4988 * for HCI_Synchronous_Connection_Complete is limited to
4989 * either SCO or eSCO
4990 */
4991 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
4992 return;
4993 }
4994
4995 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4996
4997 hci_dev_lock(hdev);
4998
4999 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
5000 if (!conn) {
5001 if (ev->link_type == ESCO_LINK)
5002 goto unlock;
5003
5004 /* When the link type in the event indicates SCO connection
5005 * and lookup of the connection object fails, then check
5006 * if an eSCO connection object exists.
5007 *
5008 * The core limits the synchronous connections to either
5009 * SCO or eSCO. The eSCO connection is preferred and tried
5010 * to be setup first and until successfully established,
5011 * the link type will be hinted as eSCO.
5012 */
5013 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
5014 if (!conn)
5015 goto unlock;
5016 }
5017
5018 /* The HCI_Synchronous_Connection_Complete event is only sent once per connection.
5019 * Processing it more than once per connection can corrupt kernel memory.
5020 *
5021 * As the connection handle is set here for the first time, it indicates
5022 * whether the connection is already set up.
5023 */
5024 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5025 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection");
5026 goto unlock;
5027 }
5028
5029 switch (status) {
5030 case 0x00:
5031 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
5032 if (status) {
5033 conn->state = BT_CLOSED;
5034 break;
5035 }
5036
5037 conn->state = BT_CONNECTED;
5038 conn->type = ev->link_type;
5039
5040 hci_debugfs_create_conn(conn);
5041 hci_conn_add_sysfs(conn);
5042 break;
5043
5044 case 0x10: /* Connection Accept Timeout */
5045 case 0x0d: /* Connection Rejected due to Limited Resources */
5046 case 0x11: /* Unsupported Feature or Parameter Value */
5047 case 0x1c: /* SCO interval rejected */
5048 case 0x1a: /* Unsupported Remote Feature */
5049 case 0x1e: /* Invalid LMP Parameters */
5050 case 0x1f: /* Unspecified error */
5051 case 0x20: /* Unsupported LMP Parameter value */
5052 if (conn->out) {
5053 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
5054 (hdev->esco_type & EDR_ESCO_MASK);
5055 if (hci_setup_sync(conn, conn->parent->handle))
5056 goto unlock;
5057 }
5058 fallthrough;
5059
5060 default:
5061 conn->state = BT_CLOSED;
5062 break;
5063 }
5064
5065 bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode);
5066 /* Notify only in case of SCO over HCI transport data path which
5067 * is zero and non-zero value shall be non-HCI transport data path
5068 */
5069 if (conn->codec.data_path == 0 && hdev->notify) {
5070 switch (ev->air_mode) {
5071 case 0x02:
5072 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
5073 break;
5074 case 0x03:
5075 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP);
5076 break;
5077 }
5078 }
5079
5080 hci_connect_cfm(conn, status);
5081 if (status)
5082 hci_conn_del(conn);
5083
5084 unlock:
5085 hci_dev_unlock(hdev);
5086 }
5087
eir_get_length(u8 * eir,size_t eir_len)5088 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
5089 {
5090 size_t parsed = 0;
5091
5092 while (parsed < eir_len) {
5093 u8 field_len = eir[0];
5094
5095 if (field_len == 0)
5096 return parsed;
5097
5098 parsed += field_len + 1;
5099 eir += field_len + 1;
5100 }
5101
5102 return eir_len;
5103 }
5104
hci_extended_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5105 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata,
5106 struct sk_buff *skb)
5107 {
5108 struct hci_ev_ext_inquiry_result *ev = edata;
5109 struct inquiry_data data;
5110 size_t eir_len;
5111 int i;
5112
5113 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT,
5114 flex_array_size(ev, info, ev->num)))
5115 return;
5116
5117 bt_dev_dbg(hdev, "num %d", ev->num);
5118
5119 if (!ev->num)
5120 return;
5121
5122 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
5123 return;
5124
5125 hci_dev_lock(hdev);
5126
5127 for (i = 0; i < ev->num; i++) {
5128 struct extended_inquiry_info *info = &ev->info[i];
5129 u32 flags;
5130 bool name_known;
5131
5132 bacpy(&data.bdaddr, &info->bdaddr);
5133 data.pscan_rep_mode = info->pscan_rep_mode;
5134 data.pscan_period_mode = info->pscan_period_mode;
5135 data.pscan_mode = 0x00;
5136 memcpy(data.dev_class, info->dev_class, 3);
5137 data.clock_offset = info->clock_offset;
5138 data.rssi = info->rssi;
5139 data.ssp_mode = 0x01;
5140
5141 if (hci_dev_test_flag(hdev, HCI_MGMT))
5142 name_known = eir_get_data(info->data,
5143 sizeof(info->data),
5144 EIR_NAME_COMPLETE, NULL);
5145 else
5146 name_known = true;
5147
5148 flags = hci_inquiry_cache_update(hdev, &data, name_known);
5149
5150 eir_len = eir_get_length(info->data, sizeof(info->data));
5151
5152 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
5153 info->dev_class, info->rssi,
5154 flags, info->data, eir_len, NULL, 0, 0);
5155 }
5156
5157 hci_dev_unlock(hdev);
5158 }
5159
hci_key_refresh_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5160 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data,
5161 struct sk_buff *skb)
5162 {
5163 struct hci_ev_key_refresh_complete *ev = data;
5164 struct hci_conn *conn;
5165
5166 bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status,
5167 __le16_to_cpu(ev->handle));
5168
5169 hci_dev_lock(hdev);
5170
5171 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5172 if (!conn)
5173 goto unlock;
5174
5175 /* For BR/EDR the necessary steps are taken through the
5176 * auth_complete event.
5177 */
5178 if (conn->type != LE_LINK)
5179 goto unlock;
5180
5181 if (!ev->status)
5182 conn->sec_level = conn->pending_sec_level;
5183
5184 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
5185
5186 if (ev->status && conn->state == BT_CONNECTED) {
5187 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
5188 hci_conn_drop(conn);
5189 goto unlock;
5190 }
5191
5192 if (conn->state == BT_CONFIG) {
5193 if (!ev->status)
5194 conn->state = BT_CONNECTED;
5195
5196 hci_connect_cfm(conn, ev->status);
5197 hci_conn_drop(conn);
5198 } else {
5199 hci_auth_cfm(conn, ev->status);
5200
5201 hci_conn_hold(conn);
5202 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
5203 hci_conn_drop(conn);
5204 }
5205
5206 unlock:
5207 hci_dev_unlock(hdev);
5208 }
5209
hci_get_auth_req(struct hci_conn * conn)5210 static u8 hci_get_auth_req(struct hci_conn *conn)
5211 {
5212 /* If remote requests no-bonding follow that lead */
5213 if (conn->remote_auth == HCI_AT_NO_BONDING ||
5214 conn->remote_auth == HCI_AT_NO_BONDING_MITM)
5215 return conn->remote_auth | (conn->auth_type & 0x01);
5216
5217 /* If both remote and local have enough IO capabilities, require
5218 * MITM protection
5219 */
5220 if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
5221 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
5222 return conn->remote_auth | 0x01;
5223
5224 /* No MITM protection possible so ignore remote requirement */
5225 return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
5226 }
5227
bredr_oob_data_present(struct hci_conn * conn)5228 static u8 bredr_oob_data_present(struct hci_conn *conn)
5229 {
5230 struct hci_dev *hdev = conn->hdev;
5231 struct oob_data *data;
5232
5233 data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
5234 if (!data)
5235 return 0x00;
5236
5237 if (bredr_sc_enabled(hdev)) {
5238 /* When Secure Connections is enabled, then just
5239 * return the present value stored with the OOB
5240 * data. The stored value contains the right present
5241 * information. However it can only be trusted when
5242 * not in Secure Connection Only mode.
5243 */
5244 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
5245 return data->present;
5246
5247 /* When Secure Connections Only mode is enabled, then
5248 * the P-256 values are required. If they are not
5249 * available, then do not declare that OOB data is
5250 * present.
5251 */
5252 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
5253 !crypto_memneq(data->hash256, ZERO_KEY, 16))
5254 return 0x00;
5255
5256 return 0x02;
5257 }
5258
5259 /* When Secure Connections is not enabled or actually
5260 * not supported by the hardware, then check that if
5261 * P-192 data values are present.
5262 */
5263 if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
5264 !crypto_memneq(data->hash192, ZERO_KEY, 16))
5265 return 0x00;
5266
5267 return 0x01;
5268 }
5269
hci_io_capa_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5270 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data,
5271 struct sk_buff *skb)
5272 {
5273 struct hci_ev_io_capa_request *ev = data;
5274 struct hci_conn *conn;
5275
5276 bt_dev_dbg(hdev, "");
5277
5278 hci_dev_lock(hdev);
5279
5280 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5281 if (!conn || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
5282 goto unlock;
5283
5284 /* Assume remote supports SSP since it has triggered this event */
5285 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
5286
5287 hci_conn_hold(conn);
5288
5289 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5290 goto unlock;
5291
5292 /* Allow pairing if we're pairable, the initiators of the
5293 * pairing or if the remote is not requesting bonding.
5294 */
5295 if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
5296 test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
5297 (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
5298 struct hci_cp_io_capability_reply cp;
5299
5300 bacpy(&cp.bdaddr, &ev->bdaddr);
5301 /* Change the IO capability from KeyboardDisplay
5302 * to DisplayYesNo as it is not supported by BT spec. */
5303 cp.capability = (conn->io_capability == 0x04) ?
5304 HCI_IO_DISPLAY_YESNO : conn->io_capability;
5305
5306 /* If we are initiators, there is no remote information yet */
5307 if (conn->remote_auth == 0xff) {
5308 /* Request MITM protection if our IO caps allow it
5309 * except for the no-bonding case.
5310 */
5311 if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5312 conn->auth_type != HCI_AT_NO_BONDING)
5313 conn->auth_type |= 0x01;
5314 } else {
5315 conn->auth_type = hci_get_auth_req(conn);
5316 }
5317
5318 /* If we're not bondable, force one of the non-bondable
5319 * authentication requirement values.
5320 */
5321 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
5322 conn->auth_type &= HCI_AT_NO_BONDING_MITM;
5323
5324 cp.authentication = conn->auth_type;
5325 cp.oob_data = bredr_oob_data_present(conn);
5326
5327 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
5328 sizeof(cp), &cp);
5329 } else {
5330 struct hci_cp_io_capability_neg_reply cp;
5331
5332 bacpy(&cp.bdaddr, &ev->bdaddr);
5333 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
5334
5335 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
5336 sizeof(cp), &cp);
5337 }
5338
5339 unlock:
5340 hci_dev_unlock(hdev);
5341 }
5342
hci_io_capa_reply_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5343 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data,
5344 struct sk_buff *skb)
5345 {
5346 struct hci_ev_io_capa_reply *ev = data;
5347 struct hci_conn *conn;
5348
5349 bt_dev_dbg(hdev, "");
5350
5351 hci_dev_lock(hdev);
5352
5353 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5354 if (!conn)
5355 goto unlock;
5356
5357 conn->remote_cap = ev->capability;
5358 conn->remote_auth = ev->authentication;
5359
5360 unlock:
5361 hci_dev_unlock(hdev);
5362 }
5363
hci_user_confirm_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5364 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data,
5365 struct sk_buff *skb)
5366 {
5367 struct hci_ev_user_confirm_req *ev = data;
5368 int loc_mitm, rem_mitm, confirm_hint = 0;
5369 struct hci_conn *conn;
5370
5371 bt_dev_dbg(hdev, "");
5372
5373 hci_dev_lock(hdev);
5374
5375 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5376 goto unlock;
5377
5378 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5379 if (!conn)
5380 goto unlock;
5381
5382 loc_mitm = (conn->auth_type & 0x01);
5383 rem_mitm = (conn->remote_auth & 0x01);
5384
5385 /* If we require MITM but the remote device can't provide that
5386 * (it has NoInputNoOutput) then reject the confirmation
5387 * request. We check the security level here since it doesn't
5388 * necessarily match conn->auth_type.
5389 */
5390 if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
5391 conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
5392 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM");
5393 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
5394 sizeof(ev->bdaddr), &ev->bdaddr);
5395 goto unlock;
5396 }
5397
5398 /* If no side requires MITM protection; use JUST_CFM method */
5399 if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
5400 (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
5401
5402 /* If we're not the initiator of request authorization and the
5403 * local IO capability is not NoInputNoOutput, use JUST_WORKS
5404 * method (mgmt_user_confirm with confirm_hint set to 1).
5405 */
5406 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5407 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT) {
5408 bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5409 confirm_hint = 1;
5410 goto confirm;
5411 }
5412
5413 /* If there already exists link key in local host, leave the
5414 * decision to user space since the remote device could be
5415 * legitimate or malicious.
5416 */
5417 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5418 bt_dev_dbg(hdev, "Local host already has link key");
5419 confirm_hint = 1;
5420 goto confirm;
5421 }
5422
5423 BT_DBG("Auto-accept of user confirmation with %ums delay",
5424 hdev->auto_accept_delay);
5425
5426 if (hdev->auto_accept_delay > 0) {
5427 int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5428 queue_delayed_work(conn->hdev->workqueue,
5429 &conn->auto_accept_work, delay);
5430 goto unlock;
5431 }
5432
5433 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5434 sizeof(ev->bdaddr), &ev->bdaddr);
5435 goto unlock;
5436 }
5437
5438 confirm:
5439 mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5440 le32_to_cpu(ev->passkey), confirm_hint);
5441
5442 unlock:
5443 hci_dev_unlock(hdev);
5444 }
5445
hci_user_passkey_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5446 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5447 struct sk_buff *skb)
5448 {
5449 struct hci_ev_user_passkey_req *ev = data;
5450
5451 bt_dev_dbg(hdev, "");
5452
5453 if (hci_dev_test_flag(hdev, HCI_MGMT))
5454 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5455 }
5456
hci_user_passkey_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5457 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5458 struct sk_buff *skb)
5459 {
5460 struct hci_ev_user_passkey_notify *ev = data;
5461 struct hci_conn *conn;
5462
5463 bt_dev_dbg(hdev, "");
5464
5465 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5466 if (!conn)
5467 return;
5468
5469 conn->passkey_notify = __le32_to_cpu(ev->passkey);
5470 conn->passkey_entered = 0;
5471
5472 if (hci_dev_test_flag(hdev, HCI_MGMT))
5473 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5474 conn->dst_type, conn->passkey_notify,
5475 conn->passkey_entered);
5476 }
5477
hci_keypress_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5478 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5479 struct sk_buff *skb)
5480 {
5481 struct hci_ev_keypress_notify *ev = data;
5482 struct hci_conn *conn;
5483
5484 bt_dev_dbg(hdev, "");
5485
5486 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5487 if (!conn)
5488 return;
5489
5490 switch (ev->type) {
5491 case HCI_KEYPRESS_STARTED:
5492 conn->passkey_entered = 0;
5493 return;
5494
5495 case HCI_KEYPRESS_ENTERED:
5496 conn->passkey_entered++;
5497 break;
5498
5499 case HCI_KEYPRESS_ERASED:
5500 conn->passkey_entered--;
5501 break;
5502
5503 case HCI_KEYPRESS_CLEARED:
5504 conn->passkey_entered = 0;
5505 break;
5506
5507 case HCI_KEYPRESS_COMPLETED:
5508 return;
5509 }
5510
5511 if (hci_dev_test_flag(hdev, HCI_MGMT))
5512 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5513 conn->dst_type, conn->passkey_notify,
5514 conn->passkey_entered);
5515 }
5516
hci_simple_pair_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5517 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5518 struct sk_buff *skb)
5519 {
5520 struct hci_ev_simple_pair_complete *ev = data;
5521 struct hci_conn *conn;
5522
5523 bt_dev_dbg(hdev, "");
5524
5525 hci_dev_lock(hdev);
5526
5527 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5528 if (!conn || !hci_conn_ssp_enabled(conn))
5529 goto unlock;
5530
5531 /* Reset the authentication requirement to unknown */
5532 conn->remote_auth = 0xff;
5533
5534 /* To avoid duplicate auth_failed events to user space we check
5535 * the HCI_CONN_AUTH_PEND flag which will be set if we
5536 * initiated the authentication. A traditional auth_complete
5537 * event gets always produced as initiator and is also mapped to
5538 * the mgmt_auth_failed event */
5539 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5540 mgmt_auth_failed(conn, ev->status);
5541
5542 hci_conn_drop(conn);
5543
5544 unlock:
5545 hci_dev_unlock(hdev);
5546 }
5547
hci_remote_host_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5548 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5549 struct sk_buff *skb)
5550 {
5551 struct hci_ev_remote_host_features *ev = data;
5552 struct inquiry_entry *ie;
5553 struct hci_conn *conn;
5554
5555 bt_dev_dbg(hdev, "");
5556
5557 hci_dev_lock(hdev);
5558
5559 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5560 if (conn)
5561 memcpy(conn->features[1], ev->features, 8);
5562
5563 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5564 if (ie)
5565 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5566
5567 hci_dev_unlock(hdev);
5568 }
5569
hci_remote_oob_data_request_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5570 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5571 struct sk_buff *skb)
5572 {
5573 struct hci_ev_remote_oob_data_request *ev = edata;
5574 struct oob_data *data;
5575
5576 bt_dev_dbg(hdev, "");
5577
5578 hci_dev_lock(hdev);
5579
5580 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5581 goto unlock;
5582
5583 data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5584 if (!data) {
5585 struct hci_cp_remote_oob_data_neg_reply cp;
5586
5587 bacpy(&cp.bdaddr, &ev->bdaddr);
5588 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5589 sizeof(cp), &cp);
5590 goto unlock;
5591 }
5592
5593 if (bredr_sc_enabled(hdev)) {
5594 struct hci_cp_remote_oob_ext_data_reply cp;
5595
5596 bacpy(&cp.bdaddr, &ev->bdaddr);
5597 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5598 memset(cp.hash192, 0, sizeof(cp.hash192));
5599 memset(cp.rand192, 0, sizeof(cp.rand192));
5600 } else {
5601 memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5602 memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5603 }
5604 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5605 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5606
5607 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5608 sizeof(cp), &cp);
5609 } else {
5610 struct hci_cp_remote_oob_data_reply cp;
5611
5612 bacpy(&cp.bdaddr, &ev->bdaddr);
5613 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5614 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5615
5616 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5617 sizeof(cp), &cp);
5618 }
5619
5620 unlock:
5621 hci_dev_unlock(hdev);
5622 }
5623
le_conn_update_addr(struct hci_conn * conn,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * local_rpa)5624 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5625 u8 bdaddr_type, bdaddr_t *local_rpa)
5626 {
5627 if (conn->out) {
5628 conn->dst_type = bdaddr_type;
5629 conn->resp_addr_type = bdaddr_type;
5630 bacpy(&conn->resp_addr, bdaddr);
5631
5632 /* Check if the controller has set a Local RPA then it must be
5633 * used instead or hdev->rpa.
5634 */
5635 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5636 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5637 bacpy(&conn->init_addr, local_rpa);
5638 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5639 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5640 bacpy(&conn->init_addr, &conn->hdev->rpa);
5641 } else {
5642 hci_copy_identity_address(conn->hdev, &conn->init_addr,
5643 &conn->init_addr_type);
5644 }
5645 } else {
5646 conn->resp_addr_type = conn->hdev->adv_addr_type;
5647 /* Check if the controller has set a Local RPA then it must be
5648 * used instead or hdev->rpa.
5649 */
5650 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5651 conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5652 bacpy(&conn->resp_addr, local_rpa);
5653 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5654 /* In case of ext adv, resp_addr will be updated in
5655 * Adv Terminated event.
5656 */
5657 if (!ext_adv_capable(conn->hdev))
5658 bacpy(&conn->resp_addr,
5659 &conn->hdev->random_addr);
5660 } else {
5661 bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5662 }
5663
5664 conn->init_addr_type = bdaddr_type;
5665 bacpy(&conn->init_addr, bdaddr);
5666
5667 /* For incoming connections, set the default minimum
5668 * and maximum connection interval. They will be used
5669 * to check if the parameters are in range and if not
5670 * trigger the connection update procedure.
5671 */
5672 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5673 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5674 }
5675 }
5676
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)5677 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5678 bdaddr_t *bdaddr, u8 bdaddr_type,
5679 bdaddr_t *local_rpa, u8 role, u16 handle,
5680 u16 interval, u16 latency,
5681 u16 supervision_timeout)
5682 {
5683 struct hci_conn_params *params;
5684 struct hci_conn *conn;
5685 struct smp_irk *irk;
5686 u8 addr_type;
5687 int err;
5688
5689 hci_dev_lock(hdev);
5690
5691 /* All controllers implicitly stop advertising in the event of a
5692 * connection, so ensure that the state bit is cleared.
5693 */
5694 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5695
5696 /* Check for existing connection:
5697 *
5698 * 1. If it doesn't exist then use the role to create a new object.
5699 * 2. If it does exist confirm that it is connecting/BT_CONNECT in case
5700 * of initiator/master role since there could be a collision where
5701 * either side is attempting to connect or something like a fuzzing
5702 * testing is trying to play tricks to destroy the hcon object before
5703 * it even attempts to connect (e.g. hcon->state == BT_OPEN).
5704 */
5705 conn = hci_conn_hash_lookup_role(hdev, LE_LINK, role, bdaddr);
5706 if (!conn ||
5707 (conn->role == HCI_ROLE_MASTER && conn->state != BT_CONNECT)) {
5708 /* In case of error status and there is no connection pending
5709 * just unlock as there is nothing to cleanup.
5710 */
5711 if (status)
5712 goto unlock;
5713
5714 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, bdaddr_type,
5715 role);
5716 if (IS_ERR(conn)) {
5717 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
5718 goto unlock;
5719 }
5720
5721 /* If we didn't have a hci_conn object previously
5722 * but we're in central role this must be something
5723 * initiated using an accept list. Since accept list based
5724 * connections are not "first class citizens" we don't
5725 * have full tracking of them. Therefore, we go ahead
5726 * with a "best effort" approach of determining the
5727 * initiator address based on the HCI_PRIVACY flag.
5728 */
5729 if (conn->out) {
5730 conn->resp_addr_type = bdaddr_type;
5731 bacpy(&conn->resp_addr, bdaddr);
5732 if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5733 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5734 bacpy(&conn->init_addr, &hdev->rpa);
5735 } else {
5736 hci_copy_identity_address(hdev,
5737 &conn->init_addr,
5738 &conn->init_addr_type);
5739 }
5740 }
5741 } else {
5742 cancel_delayed_work(&conn->le_conn_timeout);
5743 }
5744
5745 /* The HCI_LE_Connection_Complete event is only sent once per connection.
5746 * Processing it more than once per connection can corrupt kernel memory.
5747 *
5748 * As the connection handle is set here for the first time, it indicates
5749 * whether the connection is already set up.
5750 */
5751 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5752 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5753 goto unlock;
5754 }
5755
5756 le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5757
5758 /* Lookup the identity address from the stored connection
5759 * address and address type.
5760 *
5761 * When establishing connections to an identity address, the
5762 * connection procedure will store the resolvable random
5763 * address first. Now if it can be converted back into the
5764 * identity address, start using the identity address from
5765 * now on.
5766 */
5767 irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5768 if (irk) {
5769 bacpy(&conn->dst, &irk->bdaddr);
5770 conn->dst_type = irk->addr_type;
5771 }
5772
5773 conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5774
5775 /* All connection failure handling is taken care of by the
5776 * hci_conn_failed function which is triggered by the HCI
5777 * request completion callbacks used for connecting.
5778 */
5779 if (status || hci_conn_set_handle(conn, handle))
5780 goto unlock;
5781
5782 /* Drop the connection if it has been aborted */
5783 if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5784 hci_conn_drop(conn);
5785 goto unlock;
5786 }
5787
5788 if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5789 addr_type = BDADDR_LE_PUBLIC;
5790 else
5791 addr_type = BDADDR_LE_RANDOM;
5792
5793 /* Drop the connection if the device is blocked */
5794 if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5795 hci_conn_drop(conn);
5796 goto unlock;
5797 }
5798
5799 mgmt_device_connected(hdev, conn, NULL, 0);
5800
5801 conn->sec_level = BT_SECURITY_LOW;
5802 conn->state = BT_CONFIG;
5803
5804 /* Store current advertising instance as connection advertising instance
5805 * when software rotation is in use so it can be re-enabled when
5806 * disconnected.
5807 */
5808 if (!ext_adv_capable(hdev))
5809 conn->adv_instance = hdev->cur_adv_instance;
5810
5811 conn->le_conn_interval = interval;
5812 conn->le_conn_latency = latency;
5813 conn->le_supv_timeout = supervision_timeout;
5814
5815 hci_debugfs_create_conn(conn);
5816 hci_conn_add_sysfs(conn);
5817
5818 err = hci_le_read_remote_features(conn);
5819 if (err) {
5820 conn->state = BT_CONNECTED;
5821 hci_connect_cfm(conn, status);
5822 }
5823
5824 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
5825 conn->dst_type);
5826 if (params) {
5827 hci_pend_le_list_del_init(params);
5828 if (params->conn) {
5829 hci_conn_drop(params->conn);
5830 hci_conn_put(params->conn);
5831 params->conn = NULL;
5832 }
5833 }
5834
5835 unlock:
5836 hci_update_passive_scan(hdev);
5837 hci_dev_unlock(hdev);
5838 }
5839
hci_le_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5840 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
5841 struct sk_buff *skb)
5842 {
5843 struct hci_ev_le_conn_complete *ev = data;
5844
5845 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5846
5847 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5848 NULL, ev->role, le16_to_cpu(ev->handle),
5849 le16_to_cpu(ev->interval),
5850 le16_to_cpu(ev->latency),
5851 le16_to_cpu(ev->supervision_timeout));
5852 }
5853
hci_le_enh_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5854 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
5855 struct sk_buff *skb)
5856 {
5857 struct hci_ev_le_enh_conn_complete *ev = data;
5858
5859 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5860
5861 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5862 &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
5863 le16_to_cpu(ev->interval),
5864 le16_to_cpu(ev->latency),
5865 le16_to_cpu(ev->supervision_timeout));
5866 }
5867
hci_le_pa_sync_lost_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5868 static void hci_le_pa_sync_lost_evt(struct hci_dev *hdev, void *data,
5869 struct sk_buff *skb)
5870 {
5871 struct hci_ev_le_pa_sync_lost *ev = data;
5872 u16 handle = le16_to_cpu(ev->handle);
5873 struct hci_conn *conn;
5874
5875 bt_dev_dbg(hdev, "sync handle 0x%4.4x", handle);
5876
5877 hci_dev_lock(hdev);
5878
5879 /* Delete the pa sync connection */
5880 conn = hci_conn_hash_lookup_pa_sync_handle(hdev, handle);
5881 if (conn) {
5882 clear_bit(HCI_CONN_BIG_SYNC, &conn->flags);
5883 clear_bit(HCI_CONN_PA_SYNC, &conn->flags);
5884 hci_disconn_cfm(conn, HCI_ERROR_REMOTE_USER_TERM);
5885 hci_conn_del(conn);
5886 }
5887
5888 hci_dev_unlock(hdev);
5889 }
5890
hci_le_ext_adv_term_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5891 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
5892 struct sk_buff *skb)
5893 {
5894 struct hci_evt_le_ext_adv_set_term *ev = data;
5895 struct hci_conn *conn;
5896 struct adv_info *adv, *n;
5897
5898 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5899
5900 /* The Bluetooth Core 5.3 specification clearly states that this event
5901 * shall not be sent when the Host disables the advertising set. So in
5902 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
5903 *
5904 * When the Host disables an advertising set, all cleanup is done via
5905 * its command callback and not needed to be duplicated here.
5906 */
5907 if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
5908 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
5909 return;
5910 }
5911
5912 hci_dev_lock(hdev);
5913
5914 adv = hci_find_adv_instance(hdev, ev->handle);
5915
5916 if (ev->status) {
5917 if (!adv)
5918 goto unlock;
5919
5920 /* Remove advertising as it has been terminated */
5921 hci_remove_adv_instance(hdev, ev->handle);
5922 mgmt_advertising_removed(NULL, hdev, ev->handle);
5923
5924 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
5925 if (adv->enabled)
5926 goto unlock;
5927 }
5928
5929 /* We are no longer advertising, clear HCI_LE_ADV */
5930 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5931 goto unlock;
5932 }
5933
5934 if (adv)
5935 adv->enabled = false;
5936
5937 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
5938 if (conn) {
5939 /* Store handle in the connection so the correct advertising
5940 * instance can be re-enabled when disconnected.
5941 */
5942 conn->adv_instance = ev->handle;
5943
5944 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
5945 bacmp(&conn->resp_addr, BDADDR_ANY))
5946 goto unlock;
5947
5948 if (!ev->handle) {
5949 bacpy(&conn->resp_addr, &hdev->random_addr);
5950 goto unlock;
5951 }
5952
5953 if (adv)
5954 bacpy(&conn->resp_addr, &adv->random_addr);
5955 }
5956
5957 unlock:
5958 hci_dev_unlock(hdev);
5959 }
5960
hci_le_pa_term_sync(struct hci_dev * hdev,__le16 handle)5961 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
5962 {
5963 struct hci_cp_le_pa_term_sync cp;
5964
5965 memset(&cp, 0, sizeof(cp));
5966 cp.handle = handle;
5967
5968 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
5969 }
5970
hci_le_past_received_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5971 static void hci_le_past_received_evt(struct hci_dev *hdev, void *data,
5972 struct sk_buff *skb)
5973 {
5974 struct hci_ev_le_past_received *ev = data;
5975 int mask = hdev->link_mode;
5976 __u8 flags = 0;
5977 struct hci_conn *pa_sync, *conn;
5978
5979 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5980
5981 hci_dev_lock(hdev);
5982
5983 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
5984
5985 conn = hci_conn_hash_lookup_create_pa_sync(hdev);
5986 if (!conn) {
5987 bt_dev_err(hdev,
5988 "Unable to find connection for dst %pMR sid 0x%2.2x",
5989 &ev->bdaddr, ev->sid);
5990 goto unlock;
5991 }
5992
5993 conn->sync_handle = le16_to_cpu(ev->sync_handle);
5994 conn->sid = HCI_SID_INVALID;
5995
5996 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, PA_LINK,
5997 &flags);
5998 if (!(mask & HCI_LM_ACCEPT)) {
5999 hci_le_pa_term_sync(hdev, ev->sync_handle);
6000 goto unlock;
6001 }
6002
6003 if (!(flags & HCI_PROTO_DEFER))
6004 goto unlock;
6005
6006 /* Add connection to indicate PA sync event */
6007 pa_sync = hci_conn_add_unset(hdev, PA_LINK, BDADDR_ANY, 0,
6008 HCI_ROLE_SLAVE);
6009
6010 if (IS_ERR(pa_sync))
6011 goto unlock;
6012
6013 pa_sync->sync_handle = le16_to_cpu(ev->sync_handle);
6014
6015 if (ev->status) {
6016 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6017
6018 /* Notify iso layer */
6019 hci_connect_cfm(pa_sync, ev->status);
6020 }
6021
6022 unlock:
6023 hci_dev_unlock(hdev);
6024 }
6025
hci_le_conn_update_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6026 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
6027 struct sk_buff *skb)
6028 {
6029 struct hci_ev_le_conn_update_complete *ev = data;
6030 struct hci_conn *conn;
6031
6032 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6033
6034 if (ev->status)
6035 return;
6036
6037 hci_dev_lock(hdev);
6038
6039 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6040 if (conn) {
6041 conn->le_conn_interval = le16_to_cpu(ev->interval);
6042 conn->le_conn_latency = le16_to_cpu(ev->latency);
6043 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
6044 }
6045
6046 hci_dev_unlock(hdev);
6047 }
6048
6049 /* This function requires the caller holds hdev->lock */
check_pending_le_conn(struct hci_dev * hdev,bdaddr_t * addr,u8 addr_type,bool addr_resolved,u8 adv_type,u8 phy,u8 sec_phy)6050 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
6051 bdaddr_t *addr,
6052 u8 addr_type, bool addr_resolved,
6053 u8 adv_type, u8 phy, u8 sec_phy)
6054 {
6055 struct hci_conn *conn;
6056 struct hci_conn_params *params;
6057
6058 /* If the event is not connectable don't proceed further */
6059 if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
6060 return NULL;
6061
6062 /* Ignore if the device is blocked or hdev is suspended */
6063 if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
6064 hdev->suspended)
6065 return NULL;
6066
6067 /* Most controller will fail if we try to create new connections
6068 * while we have an existing one in peripheral role.
6069 */
6070 if (hdev->conn_hash.le_num_peripheral > 0 &&
6071 (hci_test_quirk(hdev, HCI_QUIRK_BROKEN_LE_STATES) ||
6072 !(hdev->le_states[3] & 0x10)))
6073 return NULL;
6074
6075 /* If we're not connectable only connect devices that we have in
6076 * our pend_le_conns list.
6077 */
6078 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
6079 addr_type);
6080 if (!params)
6081 return NULL;
6082
6083 if (!params->explicit_connect) {
6084 switch (params->auto_connect) {
6085 case HCI_AUTO_CONN_DIRECT:
6086 /* Only devices advertising with ADV_DIRECT_IND are
6087 * triggering a connection attempt. This is allowing
6088 * incoming connections from peripheral devices.
6089 */
6090 if (adv_type != LE_ADV_DIRECT_IND)
6091 return NULL;
6092 break;
6093 case HCI_AUTO_CONN_ALWAYS:
6094 /* Devices advertising with ADV_IND or ADV_DIRECT_IND
6095 * are triggering a connection attempt. This means
6096 * that incoming connections from peripheral device are
6097 * accepted and also outgoing connections to peripheral
6098 * devices are established when found.
6099 */
6100 break;
6101 default:
6102 return NULL;
6103 }
6104 }
6105
6106 conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
6107 BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
6108 HCI_ROLE_MASTER, phy, sec_phy);
6109 if (!IS_ERR(conn)) {
6110 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
6111 * by higher layer that tried to connect, if no then
6112 * store the pointer since we don't really have any
6113 * other owner of the object besides the params that
6114 * triggered it. This way we can abort the connection if
6115 * the parameters get removed and keep the reference
6116 * count consistent once the connection is established.
6117 */
6118
6119 if (!params->explicit_connect)
6120 params->conn = hci_conn_get(conn);
6121
6122 return conn;
6123 }
6124
6125 switch (PTR_ERR(conn)) {
6126 case -EBUSY:
6127 /* If hci_connect() returns -EBUSY it means there is already
6128 * an LE connection attempt going on. Since controllers don't
6129 * support more than one connection attempt at the time, we
6130 * don't consider this an error case.
6131 */
6132 break;
6133 default:
6134 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
6135 return NULL;
6136 }
6137
6138 return NULL;
6139 }
6140
process_adv_report(struct hci_dev * hdev,u8 type,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * direct_addr,u8 direct_addr_type,u8 phy,u8 sec_phy,s8 rssi,u8 * data,u8 len,bool ext_adv,bool ctl_time,u64 instant)6141 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
6142 u8 bdaddr_type, bdaddr_t *direct_addr,
6143 u8 direct_addr_type, u8 phy, u8 sec_phy, s8 rssi,
6144 u8 *data, u8 len, bool ext_adv, bool ctl_time,
6145 u64 instant)
6146 {
6147 struct discovery_state *d = &hdev->discovery;
6148 struct smp_irk *irk;
6149 struct hci_conn *conn;
6150 bool match, bdaddr_resolved;
6151 u32 flags;
6152 u8 *ptr;
6153
6154 switch (type) {
6155 case LE_ADV_IND:
6156 case LE_ADV_DIRECT_IND:
6157 case LE_ADV_SCAN_IND:
6158 case LE_ADV_NONCONN_IND:
6159 case LE_ADV_SCAN_RSP:
6160 break;
6161 default:
6162 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6163 "type: 0x%02x", type);
6164 return;
6165 }
6166
6167 if (len > max_adv_len(hdev)) {
6168 bt_dev_err_ratelimited(hdev,
6169 "adv larger than maximum supported");
6170 return;
6171 }
6172
6173 /* Find the end of the data in case the report contains padded zero
6174 * bytes at the end causing an invalid length value.
6175 *
6176 * When data is NULL, len is 0 so there is no need for extra ptr
6177 * check as 'ptr < data + 0' is already false in such case.
6178 */
6179 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6180 if (ptr + 1 + *ptr > data + len)
6181 break;
6182 }
6183
6184 /* Adjust for actual length. This handles the case when remote
6185 * device is advertising with incorrect data length.
6186 */
6187 len = ptr - data;
6188
6189 /* If the direct address is present, then this report is from
6190 * a LE Direct Advertising Report event. In that case it is
6191 * important to see if the address is matching the local
6192 * controller address.
6193 *
6194 * If local privacy is not enable the controller shall not be
6195 * generating such event since according to its documentation it is only
6196 * valid for filter_policy 0x02 and 0x03, but the fact that it did
6197 * generate LE Direct Advertising Report means it is probably broken and
6198 * won't generate any other event which can potentially break
6199 * auto-connect logic so in case local privacy is not enable this
6200 * ignores the direct_addr so it works as a regular report.
6201 */
6202 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr &&
6203 hci_dev_test_flag(hdev, HCI_PRIVACY)) {
6204 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6205 &bdaddr_resolved);
6206
6207 /* Only resolvable random addresses are valid for these
6208 * kind of reports and others can be ignored.
6209 */
6210 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6211 return;
6212
6213 /* If the local IRK of the controller does not match
6214 * with the resolvable random address provided, then
6215 * this report can be ignored.
6216 */
6217 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6218 return;
6219 }
6220
6221 /* Check if we need to convert to identity address */
6222 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6223 if (irk) {
6224 bdaddr = &irk->bdaddr;
6225 bdaddr_type = irk->addr_type;
6226 }
6227
6228 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6229
6230 /* Check if we have been requested to connect to this device.
6231 *
6232 * direct_addr is set only for directed advertising reports (it is NULL
6233 * for advertising reports) and is already verified to be RPA above.
6234 */
6235 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6236 type, phy, sec_phy);
6237 if (!ext_adv && conn && type == LE_ADV_IND &&
6238 len <= max_adv_len(hdev)) {
6239 /* Store report for later inclusion by
6240 * mgmt_device_connected
6241 */
6242 memcpy(conn->le_adv_data, data, len);
6243 conn->le_adv_data_len = len;
6244 }
6245
6246 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6247 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6248 else
6249 flags = 0;
6250
6251 /* All scan results should be sent up for Mesh systems */
6252 if (hci_dev_test_flag(hdev, HCI_MESH)) {
6253 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6254 rssi, flags, data, len, NULL, 0, instant);
6255 return;
6256 }
6257
6258 /* Passive scanning shouldn't trigger any device found events,
6259 * except for devices marked as CONN_REPORT for which we do send
6260 * device found events, or advertisement monitoring requested.
6261 */
6262 if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6263 if (type == LE_ADV_DIRECT_IND)
6264 return;
6265
6266 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6267 bdaddr, bdaddr_type) &&
6268 idr_is_empty(&hdev->adv_monitors_idr))
6269 return;
6270
6271 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6272 rssi, flags, data, len, NULL, 0, 0);
6273 return;
6274 }
6275
6276 /* When receiving a scan response, then there is no way to
6277 * know if the remote device is connectable or not. However
6278 * since scan responses are merged with a previously seen
6279 * advertising report, the flags field from that report
6280 * will be used.
6281 *
6282 * In the unlikely case that a controller just sends a scan
6283 * response event that doesn't match the pending report, then
6284 * it is marked as a standalone SCAN_RSP.
6285 */
6286 if (type == LE_ADV_SCAN_RSP)
6287 flags = MGMT_DEV_FOUND_SCAN_RSP;
6288
6289 /* If there's nothing pending either store the data from this
6290 * event or send an immediate device found event if the data
6291 * should not be stored for later.
6292 */
6293 if (!has_pending_adv_report(hdev)) {
6294 /* If the report will trigger a SCAN_REQ store it for
6295 * later merging.
6296 */
6297 if (!ext_adv && (type == LE_ADV_IND ||
6298 type == LE_ADV_SCAN_IND)) {
6299 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6300 rssi, flags, data, len);
6301 return;
6302 }
6303
6304 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6305 rssi, flags, data, len, NULL, 0, 0);
6306 return;
6307 }
6308
6309 /* Check if the pending report is for the same device as the new one */
6310 match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6311 bdaddr_type == d->last_adv_addr_type);
6312
6313 /* If the pending data doesn't match this report or this isn't a
6314 * scan response (e.g. we got a duplicate ADV_IND) then force
6315 * sending of the pending data.
6316 */
6317 if (type != LE_ADV_SCAN_RSP || !match) {
6318 /* Send out whatever is in the cache, but skip duplicates */
6319 if (!match)
6320 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6321 d->last_adv_addr_type, NULL,
6322 d->last_adv_rssi, d->last_adv_flags,
6323 d->last_adv_data,
6324 d->last_adv_data_len, NULL, 0, 0);
6325
6326 /* If the new report will trigger a SCAN_REQ store it for
6327 * later merging.
6328 */
6329 if (!ext_adv && (type == LE_ADV_IND ||
6330 type == LE_ADV_SCAN_IND)) {
6331 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6332 rssi, flags, data, len);
6333 return;
6334 }
6335
6336 /* The advertising reports cannot be merged, so clear
6337 * the pending report and send out a device found event.
6338 */
6339 clear_pending_adv_report(hdev);
6340 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6341 rssi, flags, data, len, NULL, 0, 0);
6342 return;
6343 }
6344
6345 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6346 * the new event is a SCAN_RSP. We can therefore proceed with
6347 * sending a merged device found event.
6348 */
6349 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6350 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6351 d->last_adv_data, d->last_adv_data_len, data, len, 0);
6352 clear_pending_adv_report(hdev);
6353 }
6354
hci_le_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6355 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6356 struct sk_buff *skb)
6357 {
6358 struct hci_ev_le_advertising_report *ev = data;
6359 u64 instant = jiffies;
6360
6361 if (!ev->num)
6362 return;
6363
6364 hci_dev_lock(hdev);
6365
6366 while (ev->num--) {
6367 struct hci_ev_le_advertising_info *info;
6368 s8 rssi;
6369
6370 info = hci_le_ev_skb_pull(hdev, skb,
6371 HCI_EV_LE_ADVERTISING_REPORT,
6372 sizeof(*info));
6373 if (!info)
6374 break;
6375
6376 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6377 info->length + 1))
6378 break;
6379
6380 if (info->length <= max_adv_len(hdev)) {
6381 rssi = info->data[info->length];
6382 process_adv_report(hdev, info->type, &info->bdaddr,
6383 info->bdaddr_type, NULL, 0,
6384 HCI_ADV_PHY_1M, 0, rssi,
6385 info->data, info->length, false,
6386 false, instant);
6387 } else {
6388 bt_dev_err(hdev, "Dropping invalid advertising data");
6389 }
6390 }
6391
6392 hci_dev_unlock(hdev);
6393 }
6394
ext_evt_type_to_legacy(struct hci_dev * hdev,u16 evt_type)6395 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6396 {
6397 u16 pdu_type = evt_type & ~LE_EXT_ADV_DATA_STATUS_MASK;
6398
6399 if (!pdu_type)
6400 return LE_ADV_NONCONN_IND;
6401
6402 if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6403 switch (evt_type) {
6404 case LE_LEGACY_ADV_IND:
6405 return LE_ADV_IND;
6406 case LE_LEGACY_ADV_DIRECT_IND:
6407 return LE_ADV_DIRECT_IND;
6408 case LE_LEGACY_ADV_SCAN_IND:
6409 return LE_ADV_SCAN_IND;
6410 case LE_LEGACY_NONCONN_IND:
6411 return LE_ADV_NONCONN_IND;
6412 case LE_LEGACY_SCAN_RSP_ADV:
6413 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6414 return LE_ADV_SCAN_RSP;
6415 }
6416
6417 goto invalid;
6418 }
6419
6420 if (evt_type & LE_EXT_ADV_CONN_IND) {
6421 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6422 return LE_ADV_DIRECT_IND;
6423
6424 return LE_ADV_IND;
6425 }
6426
6427 if (evt_type & LE_EXT_ADV_SCAN_RSP)
6428 return LE_ADV_SCAN_RSP;
6429
6430 if (evt_type & LE_EXT_ADV_SCAN_IND)
6431 return LE_ADV_SCAN_IND;
6432
6433 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6434 return LE_ADV_NONCONN_IND;
6435
6436 invalid:
6437 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6438 evt_type);
6439
6440 return LE_ADV_INVALID;
6441 }
6442
hci_le_ext_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6443 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6444 struct sk_buff *skb)
6445 {
6446 struct hci_ev_le_ext_adv_report *ev = data;
6447 u64 instant = jiffies;
6448
6449 if (!ev->num)
6450 return;
6451
6452 hci_dev_lock(hdev);
6453
6454 while (ev->num--) {
6455 struct hci_ev_le_ext_adv_info *info;
6456 u8 legacy_evt_type;
6457 u16 evt_type;
6458
6459 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6460 sizeof(*info));
6461 if (!info)
6462 break;
6463
6464 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6465 info->length))
6466 break;
6467
6468 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6469 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6470
6471 if (hci_test_quirk(hdev,
6472 HCI_QUIRK_FIXUP_LE_EXT_ADV_REPORT_PHY)) {
6473 info->primary_phy &= 0x1f;
6474 info->secondary_phy &= 0x1f;
6475 }
6476
6477 /* Check if PA Sync is pending and if the hci_conn SID has not
6478 * been set update it.
6479 */
6480 if (hci_dev_test_flag(hdev, HCI_PA_SYNC)) {
6481 struct hci_conn *conn;
6482
6483 conn = hci_conn_hash_lookup_create_pa_sync(hdev);
6484 if (conn && conn->sid == HCI_SID_INVALID)
6485 conn->sid = info->sid;
6486 }
6487
6488 if (legacy_evt_type != LE_ADV_INVALID) {
6489 process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6490 info->bdaddr_type, NULL, 0,
6491 info->primary_phy,
6492 info->secondary_phy,
6493 info->rssi, info->data, info->length,
6494 !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6495 false, instant);
6496 }
6497 }
6498
6499 hci_dev_unlock(hdev);
6500 }
6501
hci_le_pa_sync_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6502 static void hci_le_pa_sync_established_evt(struct hci_dev *hdev, void *data,
6503 struct sk_buff *skb)
6504 {
6505 struct hci_ev_le_pa_sync_established *ev = data;
6506 int mask = hdev->link_mode;
6507 __u8 flags = 0;
6508 struct hci_conn *pa_sync, *conn;
6509
6510 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6511
6512 hci_dev_lock(hdev);
6513
6514 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6515
6516 conn = hci_conn_hash_lookup_create_pa_sync(hdev);
6517 if (!conn) {
6518 bt_dev_err(hdev,
6519 "Unable to find connection for dst %pMR sid 0x%2.2x",
6520 &ev->bdaddr, ev->sid);
6521 goto unlock;
6522 }
6523
6524 clear_bit(HCI_CONN_CREATE_PA_SYNC, &conn->flags);
6525
6526 conn->sync_handle = le16_to_cpu(ev->handle);
6527 conn->sid = HCI_SID_INVALID;
6528
6529 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, PA_LINK,
6530 &flags);
6531 if (!(mask & HCI_LM_ACCEPT)) {
6532 hci_le_pa_term_sync(hdev, ev->handle);
6533 goto unlock;
6534 }
6535
6536 if (!(flags & HCI_PROTO_DEFER))
6537 goto unlock;
6538
6539 /* Add connection to indicate PA sync event */
6540 pa_sync = hci_conn_add_unset(hdev, PA_LINK, BDADDR_ANY, 0,
6541 HCI_ROLE_SLAVE);
6542
6543 if (IS_ERR(pa_sync))
6544 goto unlock;
6545
6546 pa_sync->sync_handle = le16_to_cpu(ev->handle);
6547
6548 if (ev->status) {
6549 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6550
6551 /* Notify iso layer */
6552 hci_connect_cfm(pa_sync, ev->status);
6553 }
6554
6555 unlock:
6556 hci_dev_unlock(hdev);
6557 }
6558
hci_le_per_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6559 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6560 struct sk_buff *skb)
6561 {
6562 struct hci_ev_le_per_adv_report *ev = data;
6563 int mask = hdev->link_mode;
6564 __u8 flags = 0;
6565 struct hci_conn *pa_sync;
6566
6567 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6568
6569 hci_dev_lock(hdev);
6570
6571 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, PA_LINK, &flags);
6572 if (!(mask & HCI_LM_ACCEPT))
6573 goto unlock;
6574
6575 if (!(flags & HCI_PROTO_DEFER))
6576 goto unlock;
6577
6578 pa_sync = hci_conn_hash_lookup_pa_sync_handle
6579 (hdev,
6580 le16_to_cpu(ev->sync_handle));
6581
6582 if (!pa_sync)
6583 goto unlock;
6584
6585 if (ev->data_status == LE_PA_DATA_COMPLETE &&
6586 !test_and_set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags)) {
6587 /* Notify iso layer */
6588 hci_connect_cfm(pa_sync, 0);
6589
6590 /* Notify MGMT layer */
6591 mgmt_device_connected(hdev, pa_sync, NULL, 0);
6592 }
6593
6594 unlock:
6595 hci_dev_unlock(hdev);
6596 }
6597
hci_le_remote_feat_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6598 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6599 struct sk_buff *skb)
6600 {
6601 struct hci_ev_le_remote_feat_complete *ev = data;
6602 struct hci_conn *conn;
6603
6604 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6605
6606 hci_dev_lock(hdev);
6607
6608 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6609 if (conn) {
6610 if (!ev->status)
6611 memcpy(conn->features[0], ev->features, 8);
6612
6613 if (conn->state == BT_CONFIG) {
6614 __u8 status;
6615
6616 /* If the local controller supports peripheral-initiated
6617 * features exchange, but the remote controller does
6618 * not, then it is possible that the error code 0x1a
6619 * for unsupported remote feature gets returned.
6620 *
6621 * In this specific case, allow the connection to
6622 * transition into connected state and mark it as
6623 * successful.
6624 */
6625 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE &&
6626 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6627 status = 0x00;
6628 else
6629 status = ev->status;
6630
6631 conn->state = BT_CONNECTED;
6632 hci_connect_cfm(conn, status);
6633 }
6634 }
6635
6636 hci_dev_unlock(hdev);
6637 }
6638
hci_le_ltk_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6639 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6640 struct sk_buff *skb)
6641 {
6642 struct hci_ev_le_ltk_req *ev = data;
6643 struct hci_cp_le_ltk_reply cp;
6644 struct hci_cp_le_ltk_neg_reply neg;
6645 struct hci_conn *conn;
6646 struct smp_ltk *ltk;
6647
6648 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6649
6650 hci_dev_lock(hdev);
6651
6652 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6653 if (conn == NULL)
6654 goto not_found;
6655
6656 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6657 if (!ltk)
6658 goto not_found;
6659
6660 if (smp_ltk_is_sc(ltk)) {
6661 /* With SC both EDiv and Rand are set to zero */
6662 if (ev->ediv || ev->rand)
6663 goto not_found;
6664 } else {
6665 /* For non-SC keys check that EDiv and Rand match */
6666 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6667 goto not_found;
6668 }
6669
6670 memcpy(cp.ltk, ltk->val, ltk->enc_size);
6671 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6672 cp.handle = cpu_to_le16(conn->handle);
6673
6674 conn->pending_sec_level = smp_ltk_sec_level(ltk);
6675
6676 conn->enc_key_size = ltk->enc_size;
6677
6678 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6679
6680 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6681 * temporary key used to encrypt a connection following
6682 * pairing. It is used during the Encrypted Session Setup to
6683 * distribute the keys. Later, security can be re-established
6684 * using a distributed LTK.
6685 */
6686 if (ltk->type == SMP_STK) {
6687 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6688 list_del_rcu(<k->list);
6689 kfree_rcu(ltk, rcu);
6690 } else {
6691 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6692 }
6693
6694 hci_dev_unlock(hdev);
6695
6696 return;
6697
6698 not_found:
6699 neg.handle = ev->handle;
6700 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6701 hci_dev_unlock(hdev);
6702 }
6703
send_conn_param_neg_reply(struct hci_dev * hdev,u16 handle,u8 reason)6704 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6705 u8 reason)
6706 {
6707 struct hci_cp_le_conn_param_req_neg_reply cp;
6708
6709 cp.handle = cpu_to_le16(handle);
6710 cp.reason = reason;
6711
6712 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6713 &cp);
6714 }
6715
hci_le_remote_conn_param_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6716 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6717 struct sk_buff *skb)
6718 {
6719 struct hci_ev_le_remote_conn_param_req *ev = data;
6720 struct hci_cp_le_conn_param_req_reply cp;
6721 struct hci_conn *hcon;
6722 u16 handle, min, max, latency, timeout;
6723
6724 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6725
6726 handle = le16_to_cpu(ev->handle);
6727 min = le16_to_cpu(ev->interval_min);
6728 max = le16_to_cpu(ev->interval_max);
6729 latency = le16_to_cpu(ev->latency);
6730 timeout = le16_to_cpu(ev->timeout);
6731
6732 hcon = hci_conn_hash_lookup_handle(hdev, handle);
6733 if (!hcon || hcon->state != BT_CONNECTED)
6734 return send_conn_param_neg_reply(hdev, handle,
6735 HCI_ERROR_UNKNOWN_CONN_ID);
6736
6737 if (max > hcon->le_conn_max_interval)
6738 return send_conn_param_neg_reply(hdev, handle,
6739 HCI_ERROR_INVALID_LL_PARAMS);
6740
6741 if (hci_check_conn_params(min, max, latency, timeout))
6742 return send_conn_param_neg_reply(hdev, handle,
6743 HCI_ERROR_INVALID_LL_PARAMS);
6744
6745 if (hcon->role == HCI_ROLE_MASTER) {
6746 struct hci_conn_params *params;
6747 u8 store_hint;
6748
6749 hci_dev_lock(hdev);
6750
6751 params = hci_conn_params_lookup(hdev, &hcon->dst,
6752 hcon->dst_type);
6753 if (params) {
6754 params->conn_min_interval = min;
6755 params->conn_max_interval = max;
6756 params->conn_latency = latency;
6757 params->supervision_timeout = timeout;
6758 store_hint = 0x01;
6759 } else {
6760 store_hint = 0x00;
6761 }
6762
6763 hci_dev_unlock(hdev);
6764
6765 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6766 store_hint, min, max, latency, timeout);
6767 }
6768
6769 cp.handle = ev->handle;
6770 cp.interval_min = ev->interval_min;
6771 cp.interval_max = ev->interval_max;
6772 cp.latency = ev->latency;
6773 cp.timeout = ev->timeout;
6774 cp.min_ce_len = 0;
6775 cp.max_ce_len = 0;
6776
6777 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6778 }
6779
hci_le_direct_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6780 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6781 struct sk_buff *skb)
6782 {
6783 struct hci_ev_le_direct_adv_report *ev = data;
6784 u64 instant = jiffies;
6785 int i;
6786
6787 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6788 flex_array_size(ev, info, ev->num)))
6789 return;
6790
6791 if (!ev->num)
6792 return;
6793
6794 hci_dev_lock(hdev);
6795
6796 for (i = 0; i < ev->num; i++) {
6797 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6798
6799 process_adv_report(hdev, info->type, &info->bdaddr,
6800 info->bdaddr_type, &info->direct_addr,
6801 info->direct_addr_type, HCI_ADV_PHY_1M, 0,
6802 info->rssi, NULL, 0, false, false, instant);
6803 }
6804
6805 hci_dev_unlock(hdev);
6806 }
6807
hci_le_phy_update_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6808 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6809 struct sk_buff *skb)
6810 {
6811 struct hci_ev_le_phy_update_complete *ev = data;
6812 struct hci_conn *conn;
6813
6814 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6815
6816 if (ev->status)
6817 return;
6818
6819 hci_dev_lock(hdev);
6820
6821 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6822 if (!conn)
6823 goto unlock;
6824
6825 conn->le_tx_phy = ev->tx_phy;
6826 conn->le_rx_phy = ev->rx_phy;
6827
6828 unlock:
6829 hci_dev_unlock(hdev);
6830 }
6831
hci_le_cis_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6832 static void hci_le_cis_established_evt(struct hci_dev *hdev, void *data,
6833 struct sk_buff *skb)
6834 {
6835 struct hci_evt_le_cis_established *ev = data;
6836 struct hci_conn *conn;
6837 struct bt_iso_qos *qos;
6838 bool pending = false;
6839 u16 handle = __le16_to_cpu(ev->handle);
6840 u32 c_sdu_interval, p_sdu_interval;
6841
6842 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6843
6844 hci_dev_lock(hdev);
6845
6846 conn = hci_conn_hash_lookup_handle(hdev, handle);
6847 if (!conn) {
6848 bt_dev_err(hdev,
6849 "Unable to find connection with handle 0x%4.4x",
6850 handle);
6851 goto unlock;
6852 }
6853
6854 if (conn->type != CIS_LINK) {
6855 bt_dev_err(hdev,
6856 "Invalid connection link type handle 0x%4.4x",
6857 handle);
6858 goto unlock;
6859 }
6860
6861 qos = &conn->iso_qos;
6862
6863 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6864
6865 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part G
6866 * page 3075:
6867 * Transport_Latency_C_To_P = CIG_Sync_Delay + (FT_C_To_P) ×
6868 * ISO_Interval + SDU_Interval_C_To_P
6869 * ...
6870 * SDU_Interval = (CIG_Sync_Delay + (FT) x ISO_Interval) -
6871 * Transport_Latency
6872 */
6873 c_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6874 (ev->c_ft * le16_to_cpu(ev->interval) * 1250)) -
6875 get_unaligned_le24(ev->c_latency);
6876 p_sdu_interval = (get_unaligned_le24(ev->cig_sync_delay) +
6877 (ev->p_ft * le16_to_cpu(ev->interval) * 1250)) -
6878 get_unaligned_le24(ev->p_latency);
6879
6880 switch (conn->role) {
6881 case HCI_ROLE_SLAVE:
6882 qos->ucast.in.interval = c_sdu_interval;
6883 qos->ucast.out.interval = p_sdu_interval;
6884 /* Convert Transport Latency (us) to Latency (msec) */
6885 qos->ucast.in.latency =
6886 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6887 1000);
6888 qos->ucast.out.latency =
6889 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6890 1000);
6891 qos->ucast.in.sdu = ev->c_bn ? le16_to_cpu(ev->c_mtu) : 0;
6892 qos->ucast.out.sdu = ev->p_bn ? le16_to_cpu(ev->p_mtu) : 0;
6893 qos->ucast.in.phy = ev->c_phy;
6894 qos->ucast.out.phy = ev->p_phy;
6895 break;
6896 case HCI_ROLE_MASTER:
6897 qos->ucast.in.interval = p_sdu_interval;
6898 qos->ucast.out.interval = c_sdu_interval;
6899 /* Convert Transport Latency (us) to Latency (msec) */
6900 qos->ucast.out.latency =
6901 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6902 1000);
6903 qos->ucast.in.latency =
6904 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6905 1000);
6906 qos->ucast.out.sdu = ev->c_bn ? le16_to_cpu(ev->c_mtu) : 0;
6907 qos->ucast.in.sdu = ev->p_bn ? le16_to_cpu(ev->p_mtu) : 0;
6908 qos->ucast.out.phy = ev->c_phy;
6909 qos->ucast.in.phy = ev->p_phy;
6910 break;
6911 }
6912
6913 if (!ev->status) {
6914 conn->state = BT_CONNECTED;
6915 hci_debugfs_create_conn(conn);
6916 hci_conn_add_sysfs(conn);
6917 hci_iso_setup_path(conn);
6918 goto unlock;
6919 }
6920
6921 conn->state = BT_CLOSED;
6922 hci_connect_cfm(conn, ev->status);
6923 hci_conn_del(conn);
6924
6925 unlock:
6926 if (pending)
6927 hci_le_create_cis_pending(hdev);
6928
6929 hci_dev_unlock(hdev);
6930 }
6931
hci_le_reject_cis(struct hci_dev * hdev,__le16 handle)6932 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6933 {
6934 struct hci_cp_le_reject_cis cp;
6935
6936 memset(&cp, 0, sizeof(cp));
6937 cp.handle = handle;
6938 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6939 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6940 }
6941
hci_le_accept_cis(struct hci_dev * hdev,__le16 handle)6942 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6943 {
6944 struct hci_cp_le_accept_cis cp;
6945
6946 memset(&cp, 0, sizeof(cp));
6947 cp.handle = handle;
6948 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6949 }
6950
hci_le_cis_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6951 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6952 struct sk_buff *skb)
6953 {
6954 struct hci_evt_le_cis_req *ev = data;
6955 u16 acl_handle, cis_handle;
6956 struct hci_conn *acl, *cis;
6957 int mask;
6958 __u8 flags = 0;
6959
6960 acl_handle = __le16_to_cpu(ev->acl_handle);
6961 cis_handle = __le16_to_cpu(ev->cis_handle);
6962
6963 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
6964 acl_handle, cis_handle, ev->cig_id, ev->cis_id);
6965
6966 hci_dev_lock(hdev);
6967
6968 acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
6969 if (!acl)
6970 goto unlock;
6971
6972 mask = hci_proto_connect_ind(hdev, &acl->dst, CIS_LINK, &flags);
6973 if (!(mask & HCI_LM_ACCEPT)) {
6974 hci_le_reject_cis(hdev, ev->cis_handle);
6975 goto unlock;
6976 }
6977
6978 cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
6979 if (!cis) {
6980 cis = hci_conn_add(hdev, CIS_LINK, &acl->dst, acl->dst_type,
6981 HCI_ROLE_SLAVE, cis_handle);
6982 if (IS_ERR(cis)) {
6983 hci_le_reject_cis(hdev, ev->cis_handle);
6984 goto unlock;
6985 }
6986 }
6987
6988 cis->iso_qos.ucast.cig = ev->cig_id;
6989 cis->iso_qos.ucast.cis = ev->cis_id;
6990
6991 if (!(flags & HCI_PROTO_DEFER)) {
6992 hci_le_accept_cis(hdev, ev->cis_handle);
6993 } else {
6994 cis->state = BT_CONNECT2;
6995 hci_connect_cfm(cis, 0);
6996 }
6997
6998 unlock:
6999 hci_dev_unlock(hdev);
7000 }
7001
hci_iso_term_big_sync(struct hci_dev * hdev,void * data)7002 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
7003 {
7004 u8 handle = PTR_UINT(data);
7005
7006 return hci_le_terminate_big_sync(hdev, handle,
7007 HCI_ERROR_LOCAL_HOST_TERM);
7008 }
7009
hci_le_create_big_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)7010 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
7011 struct sk_buff *skb)
7012 {
7013 struct hci_evt_le_create_big_complete *ev = data;
7014 struct hci_conn *conn;
7015 __u8 i = 0;
7016
7017 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
7018
7019 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
7020 flex_array_size(ev, bis_handle, ev->num_bis)))
7021 return;
7022
7023 hci_dev_lock(hdev);
7024
7025 /* Connect all BISes that are bound to the BIG */
7026 while ((conn = hci_conn_hash_lookup_big_state(hdev, ev->handle,
7027 BT_BOUND,
7028 HCI_ROLE_MASTER))) {
7029 if (ev->status) {
7030 hci_connect_cfm(conn, ev->status);
7031 hci_conn_del(conn);
7032 continue;
7033 }
7034
7035 if (hci_conn_set_handle(conn,
7036 __le16_to_cpu(ev->bis_handle[i++])))
7037 continue;
7038
7039 conn->state = BT_CONNECTED;
7040 set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
7041 hci_debugfs_create_conn(conn);
7042 hci_conn_add_sysfs(conn);
7043 hci_iso_setup_path(conn);
7044 }
7045
7046 if (!ev->status && !i)
7047 /* If no BISes have been connected for the BIG,
7048 * terminate. This is in case all bound connections
7049 * have been closed before the BIG creation
7050 * has completed.
7051 */
7052 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
7053 UINT_PTR(ev->handle), NULL);
7054
7055 hci_dev_unlock(hdev);
7056 }
7057
hci_le_big_sync_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)7058 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
7059 struct sk_buff *skb)
7060 {
7061 struct hci_evt_le_big_sync_established *ev = data;
7062 struct hci_conn *bis, *conn;
7063 int i;
7064
7065 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
7066
7067 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABLISHED,
7068 flex_array_size(ev, bis, ev->num_bis)))
7069 return;
7070
7071 hci_dev_lock(hdev);
7072
7073 conn = hci_conn_hash_lookup_big_sync_pend(hdev, ev->handle,
7074 ev->num_bis);
7075 if (!conn) {
7076 bt_dev_err(hdev,
7077 "Unable to find connection for big 0x%2.2x",
7078 ev->handle);
7079 goto unlock;
7080 }
7081
7082 clear_bit(HCI_CONN_CREATE_BIG_SYNC, &conn->flags);
7083
7084 conn->num_bis = 0;
7085 memset(conn->bis, 0, sizeof(conn->num_bis));
7086
7087 for (i = 0; i < ev->num_bis; i++) {
7088 u16 handle = le16_to_cpu(ev->bis[i]);
7089 __le32 interval;
7090
7091 bis = hci_conn_hash_lookup_handle(hdev, handle);
7092 if (!bis) {
7093 if (handle > HCI_CONN_HANDLE_MAX) {
7094 bt_dev_dbg(hdev, "ignore too large handle %u", handle);
7095 continue;
7096 }
7097 bis = hci_conn_add(hdev, BIS_LINK, BDADDR_ANY, 0,
7098 HCI_ROLE_SLAVE, handle);
7099 if (IS_ERR(bis))
7100 continue;
7101 }
7102
7103 if (ev->status != 0x42)
7104 /* Mark PA sync as established */
7105 set_bit(HCI_CONN_PA_SYNC, &bis->flags);
7106
7107 bis->sync_handle = conn->sync_handle;
7108 bis->iso_qos.bcast.big = ev->handle;
7109 memset(&interval, 0, sizeof(interval));
7110 memcpy(&interval, ev->latency, sizeof(ev->latency));
7111 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
7112 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
7113 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
7114 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
7115
7116 if (!ev->status) {
7117 bis->state = BT_CONNECTED;
7118 set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
7119 hci_debugfs_create_conn(bis);
7120 hci_conn_add_sysfs(bis);
7121 hci_iso_setup_path(bis);
7122 }
7123 }
7124
7125 /* In case BIG sync failed, notify each failed connection to
7126 * the user after all hci connections have been added
7127 */
7128 if (ev->status)
7129 for (i = 0; i < ev->num_bis; i++) {
7130 u16 handle = le16_to_cpu(ev->bis[i]);
7131
7132 bis = hci_conn_hash_lookup_handle(hdev, handle);
7133 if (!bis)
7134 continue;
7135
7136 set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
7137 hci_connect_cfm(bis, ev->status);
7138 }
7139
7140 unlock:
7141 hci_dev_unlock(hdev);
7142 }
7143
hci_le_big_sync_lost_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)7144 static void hci_le_big_sync_lost_evt(struct hci_dev *hdev, void *data,
7145 struct sk_buff *skb)
7146 {
7147 struct hci_evt_le_big_sync_lost *ev = data;
7148 struct hci_conn *bis;
7149 bool mgmt_conn = false;
7150
7151 bt_dev_dbg(hdev, "big handle 0x%2.2x", ev->handle);
7152
7153 hci_dev_lock(hdev);
7154
7155 /* Delete each bis connection */
7156 while ((bis = hci_conn_hash_lookup_big_state(hdev, ev->handle,
7157 BT_CONNECTED,
7158 HCI_ROLE_SLAVE))) {
7159 if (!mgmt_conn) {
7160 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED,
7161 &bis->flags);
7162 mgmt_device_disconnected(hdev, &bis->dst, bis->type,
7163 bis->dst_type, ev->reason,
7164 mgmt_conn);
7165 }
7166
7167 clear_bit(HCI_CONN_BIG_SYNC, &bis->flags);
7168 hci_disconn_cfm(bis, ev->reason);
7169 hci_conn_del(bis);
7170 }
7171
7172 hci_dev_unlock(hdev);
7173 }
7174
hci_le_big_info_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)7175 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
7176 struct sk_buff *skb)
7177 {
7178 struct hci_evt_le_big_info_adv_report *ev = data;
7179 int mask = hdev->link_mode;
7180 __u8 flags = 0;
7181 struct hci_conn *pa_sync;
7182
7183 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
7184
7185 hci_dev_lock(hdev);
7186
7187 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, BIS_LINK, &flags);
7188 if (!(mask & HCI_LM_ACCEPT))
7189 goto unlock;
7190
7191 if (!(flags & HCI_PROTO_DEFER))
7192 goto unlock;
7193
7194 pa_sync = hci_conn_hash_lookup_pa_sync_handle
7195 (hdev,
7196 le16_to_cpu(ev->sync_handle));
7197
7198 if (!pa_sync)
7199 goto unlock;
7200
7201 pa_sync->iso_qos.bcast.encryption = ev->encryption;
7202
7203 /* Notify iso layer */
7204 hci_connect_cfm(pa_sync, 0);
7205
7206 unlock:
7207 hci_dev_unlock(hdev);
7208 }
7209
hci_le_read_all_remote_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)7210 static void hci_le_read_all_remote_features_evt(struct hci_dev *hdev,
7211 void *data, struct sk_buff *skb)
7212 {
7213 struct hci_evt_le_read_all_remote_features_complete *ev = data;
7214 struct hci_conn *conn;
7215
7216 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
7217
7218 hci_dev_lock(hdev);
7219
7220 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
7221 if (!conn)
7222 goto unlock;
7223
7224 if (!ev->status)
7225 memcpy(conn->le_features, ev->features, 248);
7226
7227 if (conn->state == BT_CONFIG) {
7228 __u8 status;
7229
7230 /* If the local controller supports peripheral-initiated
7231 * features exchange, but the remote controller does
7232 * not, then it is possible that the error code 0x1a
7233 * for unsupported remote feature gets returned.
7234 *
7235 * In this specific case, allow the connection to
7236 * transition into connected state and mark it as
7237 * successful.
7238 */
7239 if (!conn->out &&
7240 ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE &&
7241 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
7242 status = 0x00;
7243 else
7244 status = ev->status;
7245
7246 conn->state = BT_CONNECTED;
7247 hci_connect_cfm(conn, status);
7248 }
7249
7250 unlock:
7251 hci_dev_unlock(hdev);
7252 }
7253
7254 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
7255 [_op] = { \
7256 .func = _func, \
7257 .min_len = _min_len, \
7258 .max_len = _max_len, \
7259 }
7260
7261 #define HCI_LE_EV(_op, _func, _len) \
7262 HCI_LE_EV_VL(_op, _func, _len, _len)
7263
7264 #define HCI_LE_EV_STATUS(_op, _func) \
7265 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
7266
7267 /* Entries in this table shall have their position according to the subevent
7268 * opcode they handle so the use of the macros above is recommend since it does
7269 * attempt to initialize at its proper index using Designated Initializers that
7270 * way events without a callback function can be omitted.
7271 */
7272 static const struct hci_le_ev {
7273 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
7274 u16 min_len;
7275 u16 max_len;
7276 } hci_le_ev_table[U8_MAX + 1] = {
7277 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
7278 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
7279 sizeof(struct hci_ev_le_conn_complete)),
7280 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
7281 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
7282 sizeof(struct hci_ev_le_advertising_report),
7283 HCI_MAX_EVENT_SIZE),
7284 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7285 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7286 hci_le_conn_update_complete_evt,
7287 sizeof(struct hci_ev_le_conn_update_complete)),
7288 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7289 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7290 hci_le_remote_feat_complete_evt,
7291 sizeof(struct hci_ev_le_remote_feat_complete)),
7292 /* [0x05 = HCI_EV_LE_LTK_REQ] */
7293 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7294 sizeof(struct hci_ev_le_ltk_req)),
7295 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7296 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7297 hci_le_remote_conn_param_req_evt,
7298 sizeof(struct hci_ev_le_remote_conn_param_req)),
7299 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7300 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7301 hci_le_enh_conn_complete_evt,
7302 sizeof(struct hci_ev_le_enh_conn_complete)),
7303 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7304 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7305 sizeof(struct hci_ev_le_direct_adv_report),
7306 HCI_MAX_EVENT_SIZE),
7307 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7308 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7309 sizeof(struct hci_ev_le_phy_update_complete)),
7310 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7311 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7312 sizeof(struct hci_ev_le_ext_adv_report),
7313 HCI_MAX_EVENT_SIZE),
7314 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7315 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7316 hci_le_pa_sync_established_evt,
7317 sizeof(struct hci_ev_le_pa_sync_established)),
7318 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7319 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7320 hci_le_per_adv_report_evt,
7321 sizeof(struct hci_ev_le_per_adv_report),
7322 HCI_MAX_EVENT_SIZE),
7323 /* [0x10 = HCI_EV_LE_PA_SYNC_LOST] */
7324 HCI_LE_EV(HCI_EV_LE_PA_SYNC_LOST, hci_le_pa_sync_lost_evt,
7325 sizeof(struct hci_ev_le_pa_sync_lost)),
7326 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7327 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7328 sizeof(struct hci_evt_le_ext_adv_set_term)),
7329 /* [0x18 = HCI_EVT_LE_PAST_RECEIVED] */
7330 HCI_LE_EV(HCI_EV_LE_PAST_RECEIVED,
7331 hci_le_past_received_evt,
7332 sizeof(struct hci_ev_le_past_received)),
7333 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7334 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_established_evt,
7335 sizeof(struct hci_evt_le_cis_established)),
7336 /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7337 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7338 sizeof(struct hci_evt_le_cis_req)),
7339 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7340 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7341 hci_le_create_big_complete_evt,
7342 sizeof(struct hci_evt_le_create_big_complete),
7343 HCI_MAX_EVENT_SIZE),
7344 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABLISHED] */
7345 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABLISHED,
7346 hci_le_big_sync_established_evt,
7347 sizeof(struct hci_evt_le_big_sync_established),
7348 HCI_MAX_EVENT_SIZE),
7349 /* [0x1e = HCI_EVT_LE_BIG_SYNC_LOST] */
7350 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_LOST,
7351 hci_le_big_sync_lost_evt,
7352 sizeof(struct hci_evt_le_big_sync_lost),
7353 HCI_MAX_EVENT_SIZE),
7354 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7355 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7356 hci_le_big_info_adv_report_evt,
7357 sizeof(struct hci_evt_le_big_info_adv_report),
7358 HCI_MAX_EVENT_SIZE),
7359 /* [0x2b = HCI_EVT_LE_ALL_REMOTE_FEATURES_COMPLETE] */
7360 HCI_LE_EV_VL(HCI_EVT_LE_ALL_REMOTE_FEATURES_COMPLETE,
7361 hci_le_read_all_remote_features_evt,
7362 sizeof(struct
7363 hci_evt_le_read_all_remote_features_complete),
7364 HCI_MAX_EVENT_SIZE),
7365 };
7366
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)7367 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7368 struct sk_buff *skb, u16 *opcode, u8 *status,
7369 hci_req_complete_t *req_complete,
7370 hci_req_complete_skb_t *req_complete_skb)
7371 {
7372 struct hci_ev_le_meta *ev = data;
7373 const struct hci_le_ev *subev;
7374
7375 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7376
7377 /* Only match event if command OGF is for LE */
7378 if (hdev->req_skb &&
7379 (hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 ||
7380 hci_skb_opcode(hdev->req_skb) == HCI_OP_NOP) &&
7381 hci_skb_event(hdev->req_skb) == ev->subevent) {
7382 *opcode = hci_skb_opcode(hdev->req_skb);
7383 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7384 req_complete_skb);
7385 }
7386
7387 subev = &hci_le_ev_table[ev->subevent];
7388 if (!subev->func)
7389 return;
7390
7391 if (skb->len < subev->min_len) {
7392 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7393 ev->subevent, skb->len, subev->min_len);
7394 return;
7395 }
7396
7397 /* Just warn if the length is over max_len size it still be
7398 * possible to partially parse the event so leave to callback to
7399 * decide if that is acceptable.
7400 */
7401 if (skb->len > subev->max_len)
7402 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7403 ev->subevent, skb->len, subev->max_len);
7404 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7405 if (!data)
7406 return;
7407
7408 subev->func(hdev, data, skb);
7409 }
7410
hci_get_cmd_complete(struct hci_dev * hdev,u16 opcode,u8 event,struct sk_buff * skb)7411 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7412 u8 event, struct sk_buff *skb)
7413 {
7414 struct hci_ev_cmd_complete *ev;
7415 struct hci_event_hdr *hdr;
7416
7417 if (!skb)
7418 return false;
7419
7420 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7421 if (!hdr)
7422 return false;
7423
7424 if (event) {
7425 if (hdr->evt != event)
7426 return false;
7427 return true;
7428 }
7429
7430 /* Check if request ended in Command Status - no way to retrieve
7431 * any extra parameters in this case.
7432 */
7433 if (hdr->evt == HCI_EV_CMD_STATUS)
7434 return false;
7435
7436 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7437 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7438 hdr->evt);
7439 return false;
7440 }
7441
7442 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7443 if (!ev)
7444 return false;
7445
7446 if (opcode != __le16_to_cpu(ev->opcode)) {
7447 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7448 __le16_to_cpu(ev->opcode));
7449 return false;
7450 }
7451
7452 return true;
7453 }
7454
hci_store_wake_reason(struct hci_dev * hdev,u8 event,struct sk_buff * skb)7455 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7456 struct sk_buff *skb)
7457 {
7458 struct hci_ev_le_advertising_info *adv;
7459 struct hci_ev_le_direct_adv_info *direct_adv;
7460 struct hci_ev_le_ext_adv_info *ext_adv;
7461 const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7462 const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7463
7464 hci_dev_lock(hdev);
7465
7466 /* If we are currently suspended and this is the first BT event seen,
7467 * save the wake reason associated with the event.
7468 */
7469 if (!hdev->suspended || hdev->wake_reason)
7470 goto unlock;
7471
7472 /* Default to remote wake. Values for wake_reason are documented in the
7473 * Bluez mgmt api docs.
7474 */
7475 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7476
7477 /* Once configured for remote wakeup, we should only wake up for
7478 * reconnections. It's useful to see which device is waking us up so
7479 * keep track of the bdaddr of the connection event that woke us up.
7480 */
7481 if (event == HCI_EV_CONN_REQUEST) {
7482 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7483 hdev->wake_addr_type = BDADDR_BREDR;
7484 } else if (event == HCI_EV_CONN_COMPLETE) {
7485 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7486 hdev->wake_addr_type = BDADDR_BREDR;
7487 } else if (event == HCI_EV_LE_META) {
7488 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7489 u8 subevent = le_ev->subevent;
7490 u8 *ptr = &skb->data[sizeof(*le_ev)];
7491 u8 num_reports = *ptr;
7492
7493 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7494 subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7495 subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7496 num_reports) {
7497 adv = (void *)(ptr + 1);
7498 direct_adv = (void *)(ptr + 1);
7499 ext_adv = (void *)(ptr + 1);
7500
7501 switch (subevent) {
7502 case HCI_EV_LE_ADVERTISING_REPORT:
7503 bacpy(&hdev->wake_addr, &adv->bdaddr);
7504 hdev->wake_addr_type = adv->bdaddr_type;
7505 break;
7506 case HCI_EV_LE_DIRECT_ADV_REPORT:
7507 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7508 hdev->wake_addr_type = direct_adv->bdaddr_type;
7509 break;
7510 case HCI_EV_LE_EXT_ADV_REPORT:
7511 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7512 hdev->wake_addr_type = ext_adv->bdaddr_type;
7513 break;
7514 }
7515 }
7516 } else {
7517 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7518 }
7519
7520 unlock:
7521 hci_dev_unlock(hdev);
7522 }
7523
7524 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7525 [_op] = { \
7526 .req = false, \
7527 .func = _func, \
7528 .min_len = _min_len, \
7529 .max_len = _max_len, \
7530 }
7531
7532 #define HCI_EV(_op, _func, _len) \
7533 HCI_EV_VL(_op, _func, _len, _len)
7534
7535 #define HCI_EV_STATUS(_op, _func) \
7536 HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7537
7538 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7539 [_op] = { \
7540 .req = true, \
7541 .func_req = _func, \
7542 .min_len = _min_len, \
7543 .max_len = _max_len, \
7544 }
7545
7546 #define HCI_EV_REQ(_op, _func, _len) \
7547 HCI_EV_REQ_VL(_op, _func, _len, _len)
7548
7549 /* Entries in this table shall have their position according to the event opcode
7550 * they handle so the use of the macros above is recommend since it does attempt
7551 * to initialize at its proper index using Designated Initializers that way
7552 * events without a callback function don't have entered.
7553 */
7554 static const struct hci_ev {
7555 bool req;
7556 union {
7557 void (*func)(struct hci_dev *hdev, void *data,
7558 struct sk_buff *skb);
7559 void (*func_req)(struct hci_dev *hdev, void *data,
7560 struct sk_buff *skb, u16 *opcode, u8 *status,
7561 hci_req_complete_t *req_complete,
7562 hci_req_complete_skb_t *req_complete_skb);
7563 };
7564 u16 min_len;
7565 u16 max_len;
7566 } hci_ev_table[U8_MAX + 1] = {
7567 /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7568 HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7569 /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7570 HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7571 sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7572 /* [0x03 = HCI_EV_CONN_COMPLETE] */
7573 HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7574 sizeof(struct hci_ev_conn_complete)),
7575 /* [0x04 = HCI_EV_CONN_REQUEST] */
7576 HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7577 sizeof(struct hci_ev_conn_request)),
7578 /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7579 HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7580 sizeof(struct hci_ev_disconn_complete)),
7581 /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7582 HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7583 sizeof(struct hci_ev_auth_complete)),
7584 /* [0x07 = HCI_EV_REMOTE_NAME] */
7585 HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7586 sizeof(struct hci_ev_remote_name)),
7587 /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7588 HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7589 sizeof(struct hci_ev_encrypt_change)),
7590 /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7591 HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7592 hci_change_link_key_complete_evt,
7593 sizeof(struct hci_ev_change_link_key_complete)),
7594 /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7595 HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7596 sizeof(struct hci_ev_remote_features)),
7597 /* [0x0e = HCI_EV_CMD_COMPLETE] */
7598 HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7599 sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7600 /* [0x0f = HCI_EV_CMD_STATUS] */
7601 HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7602 sizeof(struct hci_ev_cmd_status)),
7603 /* [0x10 = HCI_EV_CMD_STATUS] */
7604 HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7605 sizeof(struct hci_ev_hardware_error)),
7606 /* [0x12 = HCI_EV_ROLE_CHANGE] */
7607 HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7608 sizeof(struct hci_ev_role_change)),
7609 /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7610 HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7611 sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7612 /* [0x14 = HCI_EV_MODE_CHANGE] */
7613 HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7614 sizeof(struct hci_ev_mode_change)),
7615 /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7616 HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7617 sizeof(struct hci_ev_pin_code_req)),
7618 /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7619 HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7620 sizeof(struct hci_ev_link_key_req)),
7621 /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7622 HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7623 sizeof(struct hci_ev_link_key_notify)),
7624 /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7625 HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7626 sizeof(struct hci_ev_clock_offset)),
7627 /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7628 HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7629 sizeof(struct hci_ev_pkt_type_change)),
7630 /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7631 HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7632 sizeof(struct hci_ev_pscan_rep_mode)),
7633 /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7634 HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7635 hci_inquiry_result_with_rssi_evt,
7636 sizeof(struct hci_ev_inquiry_result_rssi),
7637 HCI_MAX_EVENT_SIZE),
7638 /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7639 HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7640 sizeof(struct hci_ev_remote_ext_features)),
7641 /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7642 HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7643 sizeof(struct hci_ev_sync_conn_complete)),
7644 /* [0x2f = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7645 HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7646 hci_extended_inquiry_result_evt,
7647 sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7648 /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7649 HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7650 sizeof(struct hci_ev_key_refresh_complete)),
7651 /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7652 HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7653 sizeof(struct hci_ev_io_capa_request)),
7654 /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7655 HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7656 sizeof(struct hci_ev_io_capa_reply)),
7657 /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7658 HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7659 sizeof(struct hci_ev_user_confirm_req)),
7660 /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7661 HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7662 sizeof(struct hci_ev_user_passkey_req)),
7663 /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7664 HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7665 sizeof(struct hci_ev_remote_oob_data_request)),
7666 /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7667 HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7668 sizeof(struct hci_ev_simple_pair_complete)),
7669 /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7670 HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7671 sizeof(struct hci_ev_user_passkey_notify)),
7672 /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7673 HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7674 sizeof(struct hci_ev_keypress_notify)),
7675 /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7676 HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7677 sizeof(struct hci_ev_remote_host_features)),
7678 /* [0x3e = HCI_EV_LE_META] */
7679 HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7680 sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7681 /* [0xff = HCI_EV_VENDOR] */
7682 HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7683 };
7684
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)7685 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7686 u16 *opcode, u8 *status,
7687 hci_req_complete_t *req_complete,
7688 hci_req_complete_skb_t *req_complete_skb)
7689 {
7690 const struct hci_ev *ev = &hci_ev_table[event];
7691 void *data;
7692
7693 if (!ev->func)
7694 return;
7695
7696 if (skb->len < ev->min_len) {
7697 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7698 event, skb->len, ev->min_len);
7699 return;
7700 }
7701
7702 /* Just warn if the length is over max_len size it still be
7703 * possible to partially parse the event so leave to callback to
7704 * decide if that is acceptable.
7705 */
7706 if (skb->len > ev->max_len)
7707 bt_dev_warn_ratelimited(hdev,
7708 "unexpected event 0x%2.2x length: %u > %u",
7709 event, skb->len, ev->max_len);
7710
7711 data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7712 if (!data)
7713 return;
7714
7715 if (ev->req)
7716 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7717 req_complete_skb);
7718 else
7719 ev->func(hdev, data, skb);
7720 }
7721
hci_event_packet(struct hci_dev * hdev,struct sk_buff * skb)7722 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7723 {
7724 struct hci_event_hdr *hdr = (void *) skb->data;
7725 hci_req_complete_t req_complete = NULL;
7726 hci_req_complete_skb_t req_complete_skb = NULL;
7727 struct sk_buff *orig_skb = NULL;
7728 u8 status = 0, event, req_evt = 0;
7729 u16 opcode = HCI_OP_NOP;
7730
7731 if (skb->len < sizeof(*hdr)) {
7732 bt_dev_err(hdev, "Malformed HCI Event");
7733 goto done;
7734 }
7735
7736 hci_dev_lock(hdev);
7737 kfree_skb(hdev->recv_event);
7738 hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7739 hci_dev_unlock(hdev);
7740
7741 event = hdr->evt;
7742 if (!event) {
7743 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7744 event);
7745 goto done;
7746 }
7747
7748 /* Only match event if command OGF is not for LE */
7749 if (hdev->req_skb &&
7750 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) != 0x08 &&
7751 hci_skb_event(hdev->req_skb) == event) {
7752 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->req_skb),
7753 status, &req_complete, &req_complete_skb);
7754 req_evt = event;
7755 }
7756
7757 /* If it looks like we might end up having to call
7758 * req_complete_skb, store a pristine copy of the skb since the
7759 * various handlers may modify the original one through
7760 * skb_pull() calls, etc.
7761 */
7762 if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7763 event == HCI_EV_CMD_COMPLETE)
7764 orig_skb = skb_clone(skb, GFP_KERNEL);
7765
7766 skb_pull(skb, HCI_EVENT_HDR_SIZE);
7767
7768 /* Store wake reason if we're suspended */
7769 hci_store_wake_reason(hdev, event, skb);
7770
7771 bt_dev_dbg(hdev, "event 0x%2.2x", event);
7772
7773 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7774 &req_complete_skb);
7775
7776 if (req_complete) {
7777 req_complete(hdev, status, opcode);
7778 } else if (req_complete_skb) {
7779 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7780 kfree_skb(orig_skb);
7781 orig_skb = NULL;
7782 }
7783 req_complete_skb(hdev, status, opcode, orig_skb);
7784 }
7785
7786 done:
7787 kfree_skb(orig_skb);
7788 kfree_skb(skb);
7789 hdev->stat.evt_rx++;
7790 }
7791