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#ifndef __HCI_CORE_H
27#define __HCI_CORE_H
28
29#include <linux/idr.h>
30#include <linux/leds.h>
31#include <linux/rculist.h>
32
33#include <net/bluetooth/hci.h>
34#include <net/bluetooth/hci_sync.h>
35#include <net/bluetooth/hci_sock.h>
36#include <net/bluetooth/coredump.h>
37
38/* HCI priority */
39#define HCI_PRIO_MAX 7
40
41/* HCI maximum id value */
42#define HCI_MAX_ID 10000
43
44/* HCI Core structures */
45struct inquiry_data {
46 bdaddr_t bdaddr;
47 __u8 pscan_rep_mode;
48 __u8 pscan_period_mode;
49 __u8 pscan_mode;
50 __u8 dev_class[3];
51 __le16 clock_offset;
52 __s8 rssi;
53 __u8 ssp_mode;
54};
55
56struct inquiry_entry {
57 struct list_head all; /* inq_cache.all */
58 struct list_head list; /* unknown or resolve */
59 enum {
60 NAME_NOT_KNOWN,
61 NAME_NEEDED,
62 NAME_PENDING,
63 NAME_KNOWN,
64 } name_state;
65 __u32 timestamp;
66 struct inquiry_data data;
67};
68
69struct discovery_state {
70 int type;
71 enum {
72 DISCOVERY_STOPPED,
73 DISCOVERY_STARTING,
74 DISCOVERY_FINDING,
75 DISCOVERY_RESOLVING,
76 DISCOVERY_STOPPING,
77 } state;
78 struct list_head all; /* All devices found during inquiry */
79 struct list_head unknown; /* Name state not known */
80 struct list_head resolve; /* Name needs to be resolved */
81 __u32 timestamp;
82 bdaddr_t last_adv_addr;
83 u8 last_adv_addr_type;
84 s8 last_adv_rssi;
85 u32 last_adv_flags;
86 u8 last_adv_data[HCI_MAX_EXT_AD_LENGTH];
87 u8 last_adv_data_len;
88 bool report_invalid_rssi;
89 bool result_filtering;
90 bool limited;
91 s8 rssi;
92 u16 uuid_count;
93 u8 (*uuids)[16];
94 unsigned long scan_start;
95 unsigned long scan_duration;
96 unsigned long name_resolve_timeout;
97};
98
99#define SUSPEND_NOTIFIER_TIMEOUT msecs_to_jiffies(2000) /* 2 seconds */
100
101enum suspend_tasks {
102 SUSPEND_PAUSE_DISCOVERY,
103 SUSPEND_UNPAUSE_DISCOVERY,
104
105 SUSPEND_PAUSE_ADVERTISING,
106 SUSPEND_UNPAUSE_ADVERTISING,
107
108 SUSPEND_SCAN_DISABLE,
109 SUSPEND_SCAN_ENABLE,
110 SUSPEND_DISCONNECTING,
111
112 SUSPEND_POWERING_DOWN,
113
114 SUSPEND_PREPARE_NOTIFIER,
115
116 SUSPEND_SET_ADV_FILTER,
117 __SUSPEND_NUM_TASKS
118};
119
120enum suspended_state {
121 BT_RUNNING = 0,
122 BT_SUSPEND_DISCONNECT,
123 BT_SUSPEND_CONFIGURE_WAKE,
124};
125
126struct hci_conn_hash {
127 struct list_head list;
128 unsigned int acl_num;
129 unsigned int amp_num;
130 unsigned int sco_num;
131 unsigned int iso_num;
132 unsigned int le_num;
133 unsigned int le_num_peripheral;
134};
135
136struct bdaddr_list {
137 struct list_head list;
138 bdaddr_t bdaddr;
139 u8 bdaddr_type;
140};
141
142struct codec_list {
143 struct list_head list;
144 u8 id;
145 __u16 cid;
146 __u16 vid;
147 u8 transport;
148 u8 num_caps;
149 u32 len;
150 struct hci_codec_caps caps[];
151};
152
153struct bdaddr_list_with_irk {
154 struct list_head list;
155 bdaddr_t bdaddr;
156 u8 bdaddr_type;
157 u8 peer_irk[16];
158 u8 local_irk[16];
159};
160
161/* Bitmask of connection flags */
162enum hci_conn_flags {
163 HCI_CONN_FLAG_REMOTE_WAKEUP = 1,
164 HCI_CONN_FLAG_DEVICE_PRIVACY = 2,
165};
166typedef u8 hci_conn_flags_t;
167
168struct bdaddr_list_with_flags {
169 struct list_head list;
170 bdaddr_t bdaddr;
171 u8 bdaddr_type;
172 hci_conn_flags_t flags;
173};
174
175struct bt_uuid {
176 struct list_head list;
177 u8 uuid[16];
178 u8 size;
179 u8 svc_hint;
180};
181
182struct blocked_key {
183 struct list_head list;
184 struct rcu_head rcu;
185 u8 type;
186 u8 val[16];
187};
188
189struct smp_csrk {
190 bdaddr_t bdaddr;
191 u8 bdaddr_type;
192 u8 link_type;
193 u8 type;
194 u8 val[16];
195};
196
197struct smp_ltk {
198 struct list_head list;
199 struct rcu_head rcu;
200 bdaddr_t bdaddr;
201 u8 bdaddr_type;
202 u8 link_type;
203 u8 authenticated;
204 u8 type;
205 u8 enc_size;
206 __le16 ediv;
207 __le64 rand;
208 u8 val[16];
209};
210
211struct smp_irk {
212 struct list_head list;
213 struct rcu_head rcu;
214 bdaddr_t rpa;
215 bdaddr_t bdaddr;
216 u8 addr_type;
217 u8 link_type;
218 u8 val[16];
219};
220
221struct link_key {
222 struct list_head list;
223 struct rcu_head rcu;
224 bdaddr_t bdaddr;
225 u8 bdaddr_type;
226 u8 link_type;
227 u8 type;
228 u8 val[HCI_LINK_KEY_SIZE];
229 u8 pin_len;
230};
231
232struct oob_data {
233 struct list_head list;
234 bdaddr_t bdaddr;
235 u8 bdaddr_type;
236 u8 present;
237 u8 hash192[16];
238 u8 rand192[16];
239 u8 hash256[16];
240 u8 rand256[16];
241};
242
243struct adv_info {
244 struct list_head list;
245 bool enabled;
246 bool pending;
247 bool periodic;
248 __u8 mesh;
249 __u8 instance;
250 __u32 flags;
251 __u16 timeout;
252 __u16 remaining_time;
253 __u16 duration;
254 __u16 adv_data_len;
255 __u8 adv_data[HCI_MAX_EXT_AD_LENGTH];
256 bool adv_data_changed;
257 __u16 scan_rsp_len;
258 __u8 scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
259 bool scan_rsp_changed;
260 __u16 per_adv_data_len;
261 __u8 per_adv_data[HCI_MAX_PER_AD_LENGTH];
262 __s8 tx_power;
263 __u32 min_interval;
264 __u32 max_interval;
265 bdaddr_t random_addr;
266 bool rpa_expired;
267 struct delayed_work rpa_expired_cb;
268};
269
270#define HCI_MAX_ADV_INSTANCES 5
271#define HCI_DEFAULT_ADV_DURATION 2
272
273#define HCI_ADV_TX_POWER_NO_PREFERENCE 0x7F
274
275#define DATA_CMP(_d1, _l1, _d2, _l2) \
276 (_l1 == _l2 ? memcmp(_d1, _d2, _l1) : _l1 - _l2)
277
278#define ADV_DATA_CMP(_adv, _data, _len) \
279 DATA_CMP((_adv)->adv_data, (_adv)->adv_data_len, _data, _len)
280
281#define SCAN_RSP_CMP(_adv, _data, _len) \
282 DATA_CMP((_adv)->scan_rsp_data, (_adv)->scan_rsp_len, _data, _len)
283
284struct monitored_device {
285 struct list_head list;
286
287 bdaddr_t bdaddr;
288 __u8 addr_type;
289 __u16 handle;
290 bool notified;
291};
292
293struct adv_pattern {
294 struct list_head list;
295 __u8 ad_type;
296 __u8 offset;
297 __u8 length;
298 __u8 value[HCI_MAX_EXT_AD_LENGTH];
299};
300
301struct adv_rssi_thresholds {
302 __s8 low_threshold;
303 __s8 high_threshold;
304 __u16 low_threshold_timeout;
305 __u16 high_threshold_timeout;
306 __u8 sampling_period;
307};
308
309struct adv_monitor {
310 struct list_head patterns;
311 struct adv_rssi_thresholds rssi;
312 __u16 handle;
313
314 enum {
315 ADV_MONITOR_STATE_NOT_REGISTERED,
316 ADV_MONITOR_STATE_REGISTERED,
317 ADV_MONITOR_STATE_OFFLOADED
318 } state;
319};
320
321#define HCI_MIN_ADV_MONITOR_HANDLE 1
322#define HCI_MAX_ADV_MONITOR_NUM_HANDLES 32
323#define HCI_MAX_ADV_MONITOR_NUM_PATTERNS 16
324#define HCI_ADV_MONITOR_EXT_NONE 1
325#define HCI_ADV_MONITOR_EXT_MSFT 2
326
327#define HCI_MAX_SHORT_NAME_LENGTH 10
328
329#define HCI_CONN_HANDLE_MAX 0x0eff
330#define HCI_CONN_HANDLE_UNSET(_handle) (_handle > HCI_CONN_HANDLE_MAX)
331
332/* Min encryption key size to match with SMP */
333#define HCI_MIN_ENC_KEY_SIZE 7
334
335/* Default LE RPA expiry time, 15 minutes */
336#define HCI_DEFAULT_RPA_TIMEOUT (15 * 60)
337
338/* Default min/max age of connection information (1s/3s) */
339#define DEFAULT_CONN_INFO_MIN_AGE 1000
340#define DEFAULT_CONN_INFO_MAX_AGE 3000
341/* Default authenticated payload timeout 30s */
342#define DEFAULT_AUTH_PAYLOAD_TIMEOUT 0x0bb8
343
344struct amp_assoc {
345 __u16 len;
346 __u16 offset;
347 __u16 rem_len;
348 __u16 len_so_far;
349 __u8 data[HCI_MAX_AMP_ASSOC_SIZE];
350};
351
352#define HCI_MAX_PAGES 3
353
354struct hci_dev {
355 struct list_head list;
356 struct mutex lock;
357
358 struct ida unset_handle_ida;
359
360 const char *name;
361 unsigned long flags;
362 __u16 id;
363 __u8 bus;
364 __u8 dev_type;
365 bdaddr_t bdaddr;
366 bdaddr_t setup_addr;
367 bdaddr_t public_addr;
368 bdaddr_t random_addr;
369 bdaddr_t static_addr;
370 __u8 adv_addr_type;
371 __u8 dev_name[HCI_MAX_NAME_LENGTH];
372 __u8 short_name[HCI_MAX_SHORT_NAME_LENGTH];
373 __u8 eir[HCI_MAX_EIR_LENGTH];
374 __u16 appearance;
375 __u8 dev_class[3];
376 __u8 major_class;
377 __u8 minor_class;
378 __u8 max_page;
379 __u8 features[HCI_MAX_PAGES][8];
380 __u8 le_features[8];
381 __u8 le_accept_list_size;
382 __u8 le_resolv_list_size;
383 __u8 le_num_of_adv_sets;
384 __u8 le_states[8];
385 __u8 mesh_ad_types[16];
386 __u8 mesh_send_ref;
387 __u8 commands[64];
388 __u8 hci_ver;
389 __u16 hci_rev;
390 __u8 lmp_ver;
391 __u16 manufacturer;
392 __u16 lmp_subver;
393 __u16 voice_setting;
394 __u8 num_iac;
395 __u16 stored_max_keys;
396 __u16 stored_num_keys;
397 __u8 io_capability;
398 __s8 inq_tx_power;
399 __u8 err_data_reporting;
400 __u16 page_scan_interval;
401 __u16 page_scan_window;
402 __u8 page_scan_type;
403 __u8 le_adv_channel_map;
404 __u16 le_adv_min_interval;
405 __u16 le_adv_max_interval;
406 __u8 le_scan_type;
407 __u16 le_scan_interval;
408 __u16 le_scan_window;
409 __u16 le_scan_int_suspend;
410 __u16 le_scan_window_suspend;
411 __u16 le_scan_int_discovery;
412 __u16 le_scan_window_discovery;
413 __u16 le_scan_int_adv_monitor;
414 __u16 le_scan_window_adv_monitor;
415 __u16 le_scan_int_connect;
416 __u16 le_scan_window_connect;
417 __u16 le_conn_min_interval;
418 __u16 le_conn_max_interval;
419 __u16 le_conn_latency;
420 __u16 le_supv_timeout;
421 __u16 le_def_tx_len;
422 __u16 le_def_tx_time;
423 __u16 le_max_tx_len;
424 __u16 le_max_tx_time;
425 __u16 le_max_rx_len;
426 __u16 le_max_rx_time;
427 __u8 le_max_key_size;
428 __u8 le_min_key_size;
429 __u16 discov_interleaved_timeout;
430 __u16 conn_info_min_age;
431 __u16 conn_info_max_age;
432 __u16 auth_payload_timeout;
433 __u8 min_enc_key_size;
434 __u8 max_enc_key_size;
435 __u8 pairing_opts;
436 __u8 ssp_debug_mode;
437 __u8 hw_error_code;
438 __u32 clock;
439 __u16 advmon_allowlist_duration;
440 __u16 advmon_no_filter_duration;
441 __u8 enable_advmon_interleave_scan;
442
443 __u16 devid_source;
444 __u16 devid_vendor;
445 __u16 devid_product;
446 __u16 devid_version;
447
448 __u8 def_page_scan_type;
449 __u16 def_page_scan_int;
450 __u16 def_page_scan_window;
451 __u8 def_inq_scan_type;
452 __u16 def_inq_scan_int;
453 __u16 def_inq_scan_window;
454 __u16 def_br_lsto;
455 __u16 def_page_timeout;
456 __u16 def_multi_adv_rotation_duration;
457 __u16 def_le_autoconnect_timeout;
458 __s8 min_le_tx_power;
459 __s8 max_le_tx_power;
460
461 __u16 pkt_type;
462 __u16 esco_type;
463 __u16 link_policy;
464 __u16 link_mode;
465
466 __u32 idle_timeout;
467 __u16 sniff_min_interval;
468 __u16 sniff_max_interval;
469
470 __u8 amp_status;
471 __u32 amp_total_bw;
472 __u32 amp_max_bw;
473 __u32 amp_min_latency;
474 __u32 amp_max_pdu;
475 __u8 amp_type;
476 __u16 amp_pal_cap;
477 __u16 amp_assoc_size;
478 __u32 amp_max_flush_to;
479 __u32 amp_be_flush_to;
480
481 struct amp_assoc loc_assoc;
482
483 __u8 flow_ctl_mode;
484
485 unsigned int auto_accept_delay;
486
487 unsigned long quirks;
488
489 atomic_t cmd_cnt;
490 unsigned int acl_cnt;
491 unsigned int sco_cnt;
492 unsigned int le_cnt;
493 unsigned int iso_cnt;
494
495 unsigned int acl_mtu;
496 unsigned int sco_mtu;
497 unsigned int le_mtu;
498 unsigned int iso_mtu;
499 unsigned int acl_pkts;
500 unsigned int sco_pkts;
501 unsigned int le_pkts;
502 unsigned int iso_pkts;
503
504 __u16 block_len;
505 __u16 block_mtu;
506 __u16 num_blocks;
507 __u16 block_cnt;
508
509 unsigned long acl_last_tx;
510 unsigned long sco_last_tx;
511 unsigned long le_last_tx;
512
513 __u8 le_tx_def_phys;
514 __u8 le_rx_def_phys;
515
516 struct workqueue_struct *workqueue;
517 struct workqueue_struct *req_workqueue;
518
519 struct work_struct power_on;
520 struct delayed_work power_off;
521 struct work_struct error_reset;
522 struct work_struct cmd_sync_work;
523 struct list_head cmd_sync_work_list;
524 struct mutex cmd_sync_work_lock;
525 struct mutex unregister_lock;
526 struct work_struct cmd_sync_cancel_work;
527 struct work_struct reenable_adv_work;
528
529 __u16 discov_timeout;
530 struct delayed_work discov_off;
531
532 struct delayed_work service_cache;
533
534 struct delayed_work cmd_timer;
535 struct delayed_work ncmd_timer;
536
537 struct work_struct rx_work;
538 struct work_struct cmd_work;
539 struct work_struct tx_work;
540
541 struct delayed_work le_scan_disable;
542
543 struct sk_buff_head rx_q;
544 struct sk_buff_head raw_q;
545 struct sk_buff_head cmd_q;
546
547 struct sk_buff *sent_cmd;
548 struct sk_buff *recv_event;
549
550 struct mutex req_lock;
551 wait_queue_head_t req_wait_q;
552 __u32 req_status;
553 __u32 req_result;
554 struct sk_buff *req_skb;
555 struct sk_buff *req_rsp;
556
557 void *smp_data;
558 void *smp_bredr_data;
559
560 struct discovery_state discovery;
561
562 int discovery_old_state;
563 bool discovery_paused;
564 int advertising_old_state;
565 bool advertising_paused;
566
567 struct notifier_block suspend_notifier;
568 enum suspended_state suspend_state_next;
569 enum suspended_state suspend_state;
570 bool scanning_paused;
571 bool suspended;
572 u8 wake_reason;
573 bdaddr_t wake_addr;
574 u8 wake_addr_type;
575
576 struct hci_conn_hash conn_hash;
577
578 struct list_head mesh_pending;
579 struct list_head mgmt_pending;
580 struct list_head reject_list;
581 struct list_head accept_list;
582 struct list_head uuids;
583 struct list_head link_keys;
584 struct list_head long_term_keys;
585 struct list_head identity_resolving_keys;
586 struct list_head remote_oob_data;
587 struct list_head le_accept_list;
588 struct list_head le_resolv_list;
589 struct list_head le_conn_params;
590 struct list_head pend_le_conns;
591 struct list_head pend_le_reports;
592 struct list_head blocked_keys;
593 struct list_head local_codecs;
594
595 struct hci_dev_stats stat;
596
597 atomic_t promisc;
598
599 const char *hw_info;
600 const char *fw_info;
601 struct dentry *debugfs;
602
603 struct hci_devcoredump dump;
604
605 struct device dev;
606
607 struct rfkill *rfkill;
608
609 DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
610 hci_conn_flags_t conn_flags;
611
612 __s8 adv_tx_power;
613 __u8 adv_data[HCI_MAX_EXT_AD_LENGTH];
614 __u8 adv_data_len;
615 __u8 scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
616 __u8 scan_rsp_data_len;
617 __u8 per_adv_data[HCI_MAX_PER_AD_LENGTH];
618 __u8 per_adv_data_len;
619
620 struct list_head adv_instances;
621 unsigned int adv_instance_cnt;
622 __u8 cur_adv_instance;
623 __u16 adv_instance_timeout;
624 struct delayed_work adv_instance_expire;
625
626 struct idr adv_monitors_idr;
627 unsigned int adv_monitors_cnt;
628
629 __u8 irk[16];
630 __u32 rpa_timeout;
631 struct delayed_work rpa_expired;
632 bdaddr_t rpa;
633
634 struct delayed_work mesh_send_done;
635
636 enum {
637 INTERLEAVE_SCAN_NONE,
638 INTERLEAVE_SCAN_NO_FILTER,
639 INTERLEAVE_SCAN_ALLOWLIST
640 } interleave_scan_state;
641
642 struct delayed_work interleave_scan;
643
644 struct list_head monitored_devices;
645 bool advmon_pend_notify;
646
647#if IS_ENABLED(CONFIG_BT_LEDS)
648 struct led_trigger *power_led;
649#endif
650
651#if IS_ENABLED(CONFIG_BT_MSFTEXT)
652 __u16 msft_opcode;
653 void *msft_data;
654 bool msft_curve_validity;
655#endif
656
657#if IS_ENABLED(CONFIG_BT_AOSPEXT)
658 bool aosp_capable;
659 bool aosp_quality_report;
660#endif
661
662 int (*open)(struct hci_dev *hdev);
663 int (*close)(struct hci_dev *hdev);
664 int (*flush)(struct hci_dev *hdev);
665 int (*setup)(struct hci_dev *hdev);
666 int (*shutdown)(struct hci_dev *hdev);
667 int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
668 void (*notify)(struct hci_dev *hdev, unsigned int evt);
669 void (*hw_error)(struct hci_dev *hdev, u8 code);
670 int (*post_init)(struct hci_dev *hdev);
671 int (*set_diag)(struct hci_dev *hdev, bool enable);
672 int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
673 void (*cmd_timeout)(struct hci_dev *hdev);
674 void (*reset)(struct hci_dev *hdev);
675 bool (*wakeup)(struct hci_dev *hdev);
676 int (*set_quality_report)(struct hci_dev *hdev, bool enable);
677 int (*get_data_path_id)(struct hci_dev *hdev, __u8 *data_path);
678 int (*get_codec_config_data)(struct hci_dev *hdev, __u8 type,
679 struct bt_codec *codec, __u8 *vnd_len,
680 __u8 **vnd_data);
681};
682
683#define HCI_PHY_HANDLE(handle) (handle & 0xff)
684
685enum conn_reasons {
686 CONN_REASON_PAIR_DEVICE,
687 CONN_REASON_L2CAP_CHAN,
688 CONN_REASON_SCO_CONNECT,
689 CONN_REASON_ISO_CONNECT,
690};
691
692struct hci_conn {
693 struct list_head list;
694
695 atomic_t refcnt;
696
697 bdaddr_t dst;
698 __u8 dst_type;
699 bdaddr_t src;
700 __u8 src_type;
701 bdaddr_t init_addr;
702 __u8 init_addr_type;
703 bdaddr_t resp_addr;
704 __u8 resp_addr_type;
705 __u8 adv_instance;
706 __u16 handle;
707 __u16 sync_handle;
708 __u16 state;
709 __u8 mode;
710 __u8 type;
711 __u8 role;
712 bool out;
713 __u8 attempt;
714 __u8 dev_class[3];
715 __u8 features[HCI_MAX_PAGES][8];
716 __u16 pkt_type;
717 __u16 link_policy;
718 __u8 key_type;
719 __u8 auth_type;
720 __u8 sec_level;
721 __u8 pending_sec_level;
722 __u8 pin_length;
723 __u8 enc_key_size;
724 __u8 io_capability;
725 __u32 passkey_notify;
726 __u8 passkey_entered;
727 __u16 disc_timeout;
728 __u16 conn_timeout;
729 __u16 setting;
730 __u16 auth_payload_timeout;
731 __u16 le_conn_min_interval;
732 __u16 le_conn_max_interval;
733 __u16 le_conn_interval;
734 __u16 le_conn_latency;
735 __u16 le_supv_timeout;
736 __u8 le_adv_data[HCI_MAX_EXT_AD_LENGTH];
737 __u8 le_adv_data_len;
738 __u8 le_per_adv_data[HCI_MAX_PER_AD_TOT_LEN];
739 __u16 le_per_adv_data_len;
740 __u16 le_per_adv_data_offset;
741 __u8 le_tx_phy;
742 __u8 le_rx_phy;
743 __s8 rssi;
744 __s8 tx_power;
745 __s8 max_tx_power;
746 struct bt_iso_qos iso_qos;
747 unsigned long flags;
748
749 enum conn_reasons conn_reason;
750 __u8 abort_reason;
751
752 __u32 clock;
753 __u16 clock_accuracy;
754
755 unsigned long conn_info_timestamp;
756
757 __u8 remote_cap;
758 __u8 remote_auth;
759 __u8 remote_id;
760
761 unsigned int sent;
762
763 struct sk_buff_head data_q;
764 struct list_head chan_list;
765
766 struct delayed_work disc_work;
767 struct delayed_work auto_accept_work;
768 struct delayed_work idle_work;
769 struct delayed_work le_conn_timeout;
770
771 struct device dev;
772 struct dentry *debugfs;
773
774 struct hci_dev *hdev;
775 void *l2cap_data;
776 void *sco_data;
777 void *iso_data;
778 struct amp_mgr *amp_mgr;
779
780 struct list_head link_list;
781 struct hci_conn *parent;
782 struct hci_link *link;
783
784 struct bt_codec codec;
785
786 void (*connect_cfm_cb) (struct hci_conn *conn, u8 status);
787 void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
788 void (*disconn_cfm_cb) (struct hci_conn *conn, u8 reason);
789
790 void (*cleanup)(struct hci_conn *conn);
791};
792
793struct hci_link {
794 struct list_head list;
795 struct hci_conn *conn;
796};
797
798struct hci_chan {
799 struct list_head list;
800 __u16 handle;
801 struct hci_conn *conn;
802 struct sk_buff_head data_q;
803 unsigned int sent;
804 __u8 state;
805 bool amp;
806};
807
808struct hci_conn_params {
809 struct list_head list;
810 struct list_head action;
811
812 bdaddr_t addr;
813 u8 addr_type;
814
815 u16 conn_min_interval;
816 u16 conn_max_interval;
817 u16 conn_latency;
818 u16 supervision_timeout;
819
820 enum {
821 HCI_AUTO_CONN_DISABLED,
822 HCI_AUTO_CONN_REPORT,
823 HCI_AUTO_CONN_DIRECT,
824 HCI_AUTO_CONN_ALWAYS,
825 HCI_AUTO_CONN_LINK_LOSS,
826 HCI_AUTO_CONN_EXPLICIT,
827 } auto_connect;
828
829 struct hci_conn *conn;
830 bool explicit_connect;
831 /* Accessed without hdev->lock: */
832 hci_conn_flags_t flags;
833 u8 privacy_mode;
834};
835
836extern struct list_head hci_dev_list;
837extern struct list_head hci_cb_list;
838extern rwlock_t hci_dev_list_lock;
839extern struct mutex hci_cb_list_lock;
840
841#define hci_dev_set_flag(hdev, nr) set_bit((nr), (hdev)->dev_flags)
842#define hci_dev_clear_flag(hdev, nr) clear_bit((nr), (hdev)->dev_flags)
843#define hci_dev_change_flag(hdev, nr) change_bit((nr), (hdev)->dev_flags)
844#define hci_dev_test_flag(hdev, nr) test_bit((nr), (hdev)->dev_flags)
845#define hci_dev_test_and_set_flag(hdev, nr) test_and_set_bit((nr), (hdev)->dev_flags)
846#define hci_dev_test_and_clear_flag(hdev, nr) test_and_clear_bit((nr), (hdev)->dev_flags)
847#define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
848
849#define hci_dev_clear_volatile_flags(hdev) \
850 do { \
851 hci_dev_clear_flag(hdev, HCI_LE_SCAN); \
852 hci_dev_clear_flag(hdev, HCI_LE_ADV); \
853 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);\
854 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ); \
855 hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT); \
856 } while (0)
857
858#define hci_dev_le_state_simultaneous(hdev) \
859 (test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) && \
860 (hdev->le_states[4] & 0x08) && /* Central */ \
861 (hdev->le_states[4] & 0x40) && /* Peripheral */ \
862 (hdev->le_states[3] & 0x10)) /* Simultaneous */
863
864/* ----- HCI interface to upper protocols ----- */
865int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
866int l2cap_disconn_ind(struct hci_conn *hcon);
867void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
868
869#if IS_ENABLED(CONFIG_BT_BREDR)
870int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
871void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
872#else
873static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
874 __u8 *flags)
875{
876 return 0;
877}
878
879static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
880{
881}
882#endif
883
884#if IS_ENABLED(CONFIG_BT_LE)
885int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
886void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
887#else
888static inline int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
889 __u8 *flags)
890{
891 return 0;
892}
893static inline void iso_recv(struct hci_conn *hcon, struct sk_buff *skb,
894 u16 flags)
895{
896}
897#endif
898
899/* ----- Inquiry cache ----- */
900#define INQUIRY_CACHE_AGE_MAX (HZ*30) /* 30 seconds */
901#define INQUIRY_ENTRY_AGE_MAX (HZ*60) /* 60 seconds */
902
903static inline void discovery_init(struct hci_dev *hdev)
904{
905 hdev->discovery.state = DISCOVERY_STOPPED;
906 INIT_LIST_HEAD(list: &hdev->discovery.all);
907 INIT_LIST_HEAD(list: &hdev->discovery.unknown);
908 INIT_LIST_HEAD(list: &hdev->discovery.resolve);
909 hdev->discovery.report_invalid_rssi = true;
910 hdev->discovery.rssi = HCI_RSSI_INVALID;
911}
912
913static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
914{
915 hdev->discovery.result_filtering = false;
916 hdev->discovery.report_invalid_rssi = true;
917 hdev->discovery.rssi = HCI_RSSI_INVALID;
918 hdev->discovery.uuid_count = 0;
919 kfree(objp: hdev->discovery.uuids);
920 hdev->discovery.uuids = NULL;
921 hdev->discovery.scan_start = 0;
922 hdev->discovery.scan_duration = 0;
923}
924
925bool hci_discovery_active(struct hci_dev *hdev);
926
927void hci_discovery_set_state(struct hci_dev *hdev, int state);
928
929static inline int inquiry_cache_empty(struct hci_dev *hdev)
930{
931 return list_empty(head: &hdev->discovery.all);
932}
933
934static inline long inquiry_cache_age(struct hci_dev *hdev)
935{
936 struct discovery_state *c = &hdev->discovery;
937 return jiffies - c->timestamp;
938}
939
940static inline long inquiry_entry_age(struct inquiry_entry *e)
941{
942 return jiffies - e->timestamp;
943}
944
945struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
946 bdaddr_t *bdaddr);
947struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
948 bdaddr_t *bdaddr);
949struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
950 bdaddr_t *bdaddr,
951 int state);
952void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
953 struct inquiry_entry *ie);
954u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
955 bool name_known);
956void hci_inquiry_cache_flush(struct hci_dev *hdev);
957
958/* ----- HCI Connections ----- */
959enum {
960 HCI_CONN_AUTH_PEND,
961 HCI_CONN_ENCRYPT_PEND,
962 HCI_CONN_RSWITCH_PEND,
963 HCI_CONN_MODE_CHANGE_PEND,
964 HCI_CONN_SCO_SETUP_PEND,
965 HCI_CONN_MGMT_CONNECTED,
966 HCI_CONN_SSP_ENABLED,
967 HCI_CONN_SC_ENABLED,
968 HCI_CONN_AES_CCM,
969 HCI_CONN_POWER_SAVE,
970 HCI_CONN_FLUSH_KEY,
971 HCI_CONN_ENCRYPT,
972 HCI_CONN_AUTH,
973 HCI_CONN_SECURE,
974 HCI_CONN_FIPS,
975 HCI_CONN_STK_ENCRYPT,
976 HCI_CONN_AUTH_INITIATOR,
977 HCI_CONN_DROP,
978 HCI_CONN_CANCEL,
979 HCI_CONN_PARAM_REMOVAL_PEND,
980 HCI_CONN_NEW_LINK_KEY,
981 HCI_CONN_SCANNING,
982 HCI_CONN_AUTH_FAILURE,
983 HCI_CONN_PER_ADV,
984 HCI_CONN_BIG_CREATED,
985 HCI_CONN_CREATE_CIS,
986 HCI_CONN_BIG_SYNC,
987 HCI_CONN_BIG_SYNC_FAILED,
988 HCI_CONN_PA_SYNC,
989 HCI_CONN_PA_SYNC_FAILED,
990};
991
992static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
993{
994 struct hci_dev *hdev = conn->hdev;
995 return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
996 test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
997}
998
999static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
1000{
1001 struct hci_dev *hdev = conn->hdev;
1002 return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
1003 test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
1004}
1005
1006static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
1007{
1008 struct hci_conn_hash *h = &hdev->conn_hash;
1009 list_add_tail_rcu(new: &c->list, head: &h->list);
1010 switch (c->type) {
1011 case ACL_LINK:
1012 h->acl_num++;
1013 break;
1014 case AMP_LINK:
1015 h->amp_num++;
1016 break;
1017 case LE_LINK:
1018 h->le_num++;
1019 if (c->role == HCI_ROLE_SLAVE)
1020 h->le_num_peripheral++;
1021 break;
1022 case SCO_LINK:
1023 case ESCO_LINK:
1024 h->sco_num++;
1025 break;
1026 case ISO_LINK:
1027 h->iso_num++;
1028 break;
1029 }
1030}
1031
1032static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
1033{
1034 struct hci_conn_hash *h = &hdev->conn_hash;
1035
1036 list_del_rcu(entry: &c->list);
1037 synchronize_rcu();
1038
1039 switch (c->type) {
1040 case ACL_LINK:
1041 h->acl_num--;
1042 break;
1043 case AMP_LINK:
1044 h->amp_num--;
1045 break;
1046 case LE_LINK:
1047 h->le_num--;
1048 if (c->role == HCI_ROLE_SLAVE)
1049 h->le_num_peripheral--;
1050 break;
1051 case SCO_LINK:
1052 case ESCO_LINK:
1053 h->sco_num--;
1054 break;
1055 case ISO_LINK:
1056 h->iso_num--;
1057 break;
1058 }
1059}
1060
1061static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
1062{
1063 struct hci_conn_hash *h = &hdev->conn_hash;
1064 switch (type) {
1065 case ACL_LINK:
1066 return h->acl_num;
1067 case AMP_LINK:
1068 return h->amp_num;
1069 case LE_LINK:
1070 return h->le_num;
1071 case SCO_LINK:
1072 case ESCO_LINK:
1073 return h->sco_num;
1074 case ISO_LINK:
1075 return h->iso_num;
1076 default:
1077 return 0;
1078 }
1079}
1080
1081static inline unsigned int hci_conn_count(struct hci_dev *hdev)
1082{
1083 struct hci_conn_hash *c = &hdev->conn_hash;
1084
1085 return c->acl_num + c->amp_num + c->sco_num + c->le_num + c->iso_num;
1086}
1087
1088static inline bool hci_conn_valid(struct hci_dev *hdev, struct hci_conn *conn)
1089{
1090 struct hci_conn_hash *h = &hdev->conn_hash;
1091 struct hci_conn *c;
1092
1093 rcu_read_lock();
1094
1095 list_for_each_entry_rcu(c, &h->list, list) {
1096 if (c == conn) {
1097 rcu_read_unlock();
1098 return true;
1099 }
1100 }
1101 rcu_read_unlock();
1102
1103 return false;
1104}
1105
1106static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
1107{
1108 struct hci_conn_hash *h = &hdev->conn_hash;
1109 struct hci_conn *c;
1110 __u8 type = INVALID_LINK;
1111
1112 rcu_read_lock();
1113
1114 list_for_each_entry_rcu(c, &h->list, list) {
1115 if (c->handle == handle) {
1116 type = c->type;
1117 break;
1118 }
1119 }
1120
1121 rcu_read_unlock();
1122
1123 return type;
1124}
1125
1126static inline struct hci_conn *hci_conn_hash_lookup_bis(struct hci_dev *hdev,
1127 bdaddr_t *ba, __u8 bis)
1128{
1129 struct hci_conn_hash *h = &hdev->conn_hash;
1130 struct hci_conn *c;
1131
1132 rcu_read_lock();
1133
1134 list_for_each_entry_rcu(c, &h->list, list) {
1135 if (bacmp(ba1: &c->dst, ba2: ba) || c->type != ISO_LINK)
1136 continue;
1137
1138 if (c->iso_qos.bcast.bis == bis) {
1139 rcu_read_unlock();
1140 return c;
1141 }
1142 }
1143 rcu_read_unlock();
1144
1145 return NULL;
1146}
1147
1148static inline struct hci_conn *
1149hci_conn_hash_lookup_per_adv_bis(struct hci_dev *hdev,
1150 bdaddr_t *ba,
1151 __u8 big, __u8 bis)
1152{
1153 struct hci_conn_hash *h = &hdev->conn_hash;
1154 struct hci_conn *c;
1155
1156 rcu_read_lock();
1157
1158 list_for_each_entry_rcu(c, &h->list, list) {
1159 if (bacmp(ba1: &c->dst, ba2: ba) || c->type != ISO_LINK ||
1160 !test_bit(HCI_CONN_PER_ADV, &c->flags))
1161 continue;
1162
1163 if (c->iso_qos.bcast.big == big &&
1164 c->iso_qos.bcast.bis == bis) {
1165 rcu_read_unlock();
1166 return c;
1167 }
1168 }
1169 rcu_read_unlock();
1170
1171 return NULL;
1172}
1173
1174static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
1175 __u16 handle)
1176{
1177 struct hci_conn_hash *h = &hdev->conn_hash;
1178 struct hci_conn *c;
1179
1180 rcu_read_lock();
1181
1182 list_for_each_entry_rcu(c, &h->list, list) {
1183 if (c->handle == handle) {
1184 rcu_read_unlock();
1185 return c;
1186 }
1187 }
1188 rcu_read_unlock();
1189
1190 return NULL;
1191}
1192
1193static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
1194 __u8 type, bdaddr_t *ba)
1195{
1196 struct hci_conn_hash *h = &hdev->conn_hash;
1197 struct hci_conn *c;
1198
1199 rcu_read_lock();
1200
1201 list_for_each_entry_rcu(c, &h->list, list) {
1202 if (c->type == type && !bacmp(ba1: &c->dst, ba2: ba)) {
1203 rcu_read_unlock();
1204 return c;
1205 }
1206 }
1207
1208 rcu_read_unlock();
1209
1210 return NULL;
1211}
1212
1213static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
1214 bdaddr_t *ba,
1215 __u8 ba_type)
1216{
1217 struct hci_conn_hash *h = &hdev->conn_hash;
1218 struct hci_conn *c;
1219
1220 rcu_read_lock();
1221
1222 list_for_each_entry_rcu(c, &h->list, list) {
1223 if (c->type != LE_LINK)
1224 continue;
1225
1226 if (ba_type == c->dst_type && !bacmp(ba1: &c->dst, ba2: ba)) {
1227 rcu_read_unlock();
1228 return c;
1229 }
1230 }
1231
1232 rcu_read_unlock();
1233
1234 return NULL;
1235}
1236
1237static inline struct hci_conn *hci_conn_hash_lookup_cis(struct hci_dev *hdev,
1238 bdaddr_t *ba,
1239 __u8 ba_type,
1240 __u8 cig,
1241 __u8 id)
1242{
1243 struct hci_conn_hash *h = &hdev->conn_hash;
1244 struct hci_conn *c;
1245
1246 rcu_read_lock();
1247
1248 list_for_each_entry_rcu(c, &h->list, list) {
1249 if (c->type != ISO_LINK || !bacmp(ba1: &c->dst, BDADDR_ANY))
1250 continue;
1251
1252 /* Match CIG ID if set */
1253 if (cig != c->iso_qos.ucast.cig)
1254 continue;
1255
1256 /* Match CIS ID if set */
1257 if (id != c->iso_qos.ucast.cis)
1258 continue;
1259
1260 /* Match destination address if set */
1261 if (!ba || (ba_type == c->dst_type && !bacmp(ba1: &c->dst, ba2: ba))) {
1262 rcu_read_unlock();
1263 return c;
1264 }
1265 }
1266
1267 rcu_read_unlock();
1268
1269 return NULL;
1270}
1271
1272static inline struct hci_conn *hci_conn_hash_lookup_cig(struct hci_dev *hdev,
1273 __u8 handle)
1274{
1275 struct hci_conn_hash *h = &hdev->conn_hash;
1276 struct hci_conn *c;
1277
1278 rcu_read_lock();
1279
1280 list_for_each_entry_rcu(c, &h->list, list) {
1281 if (c->type != ISO_LINK || !bacmp(ba1: &c->dst, BDADDR_ANY))
1282 continue;
1283
1284 if (handle == c->iso_qos.ucast.cig) {
1285 rcu_read_unlock();
1286 return c;
1287 }
1288 }
1289
1290 rcu_read_unlock();
1291
1292 return NULL;
1293}
1294
1295static inline struct hci_conn *hci_conn_hash_lookup_big(struct hci_dev *hdev,
1296 __u8 handle)
1297{
1298 struct hci_conn_hash *h = &hdev->conn_hash;
1299 struct hci_conn *c;
1300
1301 rcu_read_lock();
1302
1303 list_for_each_entry_rcu(c, &h->list, list) {
1304 if (bacmp(ba1: &c->dst, BDADDR_ANY) || c->type != ISO_LINK)
1305 continue;
1306
1307 if (handle == c->iso_qos.bcast.big) {
1308 rcu_read_unlock();
1309 return c;
1310 }
1311 }
1312
1313 rcu_read_unlock();
1314
1315 return NULL;
1316}
1317
1318static inline struct hci_conn *
1319hci_conn_hash_lookup_big_state(struct hci_dev *hdev, __u8 handle, __u16 state)
1320{
1321 struct hci_conn_hash *h = &hdev->conn_hash;
1322 struct hci_conn *c;
1323
1324 rcu_read_lock();
1325
1326 list_for_each_entry_rcu(c, &h->list, list) {
1327 if (bacmp(ba1: &c->dst, BDADDR_ANY) || c->type != ISO_LINK ||
1328 c->state != state)
1329 continue;
1330
1331 if (handle == c->iso_qos.bcast.big) {
1332 rcu_read_unlock();
1333 return c;
1334 }
1335 }
1336
1337 rcu_read_unlock();
1338
1339 return NULL;
1340}
1341
1342static inline struct hci_conn *
1343hci_conn_hash_lookup_pa_sync_big_handle(struct hci_dev *hdev, __u8 big)
1344{
1345 struct hci_conn_hash *h = &hdev->conn_hash;
1346 struct hci_conn *c;
1347
1348 rcu_read_lock();
1349
1350 list_for_each_entry_rcu(c, &h->list, list) {
1351 if (c->type != ISO_LINK ||
1352 !test_bit(HCI_CONN_PA_SYNC, &c->flags))
1353 continue;
1354
1355 if (c->iso_qos.bcast.big == big) {
1356 rcu_read_unlock();
1357 return c;
1358 }
1359 }
1360 rcu_read_unlock();
1361
1362 return NULL;
1363}
1364
1365static inline struct hci_conn *
1366hci_conn_hash_lookup_pa_sync_handle(struct hci_dev *hdev, __u16 sync_handle)
1367{
1368 struct hci_conn_hash *h = &hdev->conn_hash;
1369 struct hci_conn *c;
1370
1371 rcu_read_lock();
1372
1373 list_for_each_entry_rcu(c, &h->list, list) {
1374 if (c->type != ISO_LINK ||
1375 !test_bit(HCI_CONN_PA_SYNC, &c->flags))
1376 continue;
1377
1378 if (c->sync_handle == sync_handle) {
1379 rcu_read_unlock();
1380 return c;
1381 }
1382 }
1383 rcu_read_unlock();
1384
1385 return NULL;
1386}
1387
1388static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
1389 __u8 type, __u16 state)
1390{
1391 struct hci_conn_hash *h = &hdev->conn_hash;
1392 struct hci_conn *c;
1393
1394 rcu_read_lock();
1395
1396 list_for_each_entry_rcu(c, &h->list, list) {
1397 if (c->type == type && c->state == state) {
1398 rcu_read_unlock();
1399 return c;
1400 }
1401 }
1402
1403 rcu_read_unlock();
1404
1405 return NULL;
1406}
1407
1408typedef void (*hci_conn_func_t)(struct hci_conn *conn, void *data);
1409static inline void hci_conn_hash_list_state(struct hci_dev *hdev,
1410 hci_conn_func_t func, __u8 type,
1411 __u16 state, void *data)
1412{
1413 struct hci_conn_hash *h = &hdev->conn_hash;
1414 struct hci_conn *c;
1415
1416 if (!func)
1417 return;
1418
1419 rcu_read_lock();
1420
1421 list_for_each_entry_rcu(c, &h->list, list) {
1422 if (c->type == type && c->state == state)
1423 func(c, data);
1424 }
1425
1426 rcu_read_unlock();
1427}
1428
1429static inline void hci_conn_hash_list_flag(struct hci_dev *hdev,
1430 hci_conn_func_t func, __u8 type,
1431 __u8 flag, void *data)
1432{
1433 struct hci_conn_hash *h = &hdev->conn_hash;
1434 struct hci_conn *c;
1435
1436 if (!func)
1437 return;
1438
1439 rcu_read_lock();
1440
1441 list_for_each_entry_rcu(c, &h->list, list) {
1442 if (c->type == type && test_bit(flag, &c->flags))
1443 func(c, data);
1444 }
1445
1446 rcu_read_unlock();
1447}
1448
1449static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
1450{
1451 struct hci_conn_hash *h = &hdev->conn_hash;
1452 struct hci_conn *c;
1453
1454 rcu_read_lock();
1455
1456 list_for_each_entry_rcu(c, &h->list, list) {
1457 if (c->type == LE_LINK && c->state == BT_CONNECT &&
1458 !test_bit(HCI_CONN_SCANNING, &c->flags)) {
1459 rcu_read_unlock();
1460 return c;
1461 }
1462 }
1463
1464 rcu_read_unlock();
1465
1466 return NULL;
1467}
1468
1469/* Returns true if an le connection is in the scanning state */
1470static inline bool hci_is_le_conn_scanning(struct hci_dev *hdev)
1471{
1472 struct hci_conn_hash *h = &hdev->conn_hash;
1473 struct hci_conn *c;
1474
1475 rcu_read_lock();
1476
1477 list_for_each_entry_rcu(c, &h->list, list) {
1478 if (c->type == LE_LINK && c->state == BT_CONNECT &&
1479 test_bit(HCI_CONN_SCANNING, &c->flags)) {
1480 rcu_read_unlock();
1481 return true;
1482 }
1483 }
1484
1485 rcu_read_unlock();
1486
1487 return false;
1488}
1489
1490int hci_disconnect(struct hci_conn *conn, __u8 reason);
1491bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
1492void hci_sco_setup(struct hci_conn *conn, __u8 status);
1493bool hci_iso_setup_path(struct hci_conn *conn);
1494int hci_le_create_cis_pending(struct hci_dev *hdev);
1495int hci_conn_check_create_cis(struct hci_conn *conn);
1496
1497struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
1498 u8 role, u16 handle);
1499struct hci_conn *hci_conn_add_unset(struct hci_dev *hdev, int type,
1500 bdaddr_t *dst, u8 role);
1501void hci_conn_del(struct hci_conn *conn);
1502void hci_conn_hash_flush(struct hci_dev *hdev);
1503
1504struct hci_chan *hci_chan_create(struct hci_conn *conn);
1505void hci_chan_del(struct hci_chan *chan);
1506void hci_chan_list_flush(struct hci_conn *conn);
1507struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
1508
1509struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1510 u8 dst_type, u8 sec_level,
1511 u16 conn_timeout,
1512 enum conn_reasons conn_reason);
1513struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
1514 u8 dst_type, bool dst_resolved, u8 sec_level,
1515 u16 conn_timeout, u8 role);
1516void hci_connect_le_scan_cleanup(struct hci_conn *conn, u8 status);
1517struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1518 u8 sec_level, u8 auth_type,
1519 enum conn_reasons conn_reason, u16 timeout);
1520struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1521 __u16 setting, struct bt_codec *codec,
1522 u16 timeout);
1523struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
1524 __u8 dst_type, struct bt_iso_qos *qos);
1525struct hci_conn *hci_bind_bis(struct hci_dev *hdev, bdaddr_t *dst,
1526 struct bt_iso_qos *qos,
1527 __u8 base_len, __u8 *base);
1528struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
1529 __u8 dst_type, struct bt_iso_qos *qos);
1530struct hci_conn *hci_connect_bis(struct hci_dev *hdev, bdaddr_t *dst,
1531 __u8 dst_type, struct bt_iso_qos *qos,
1532 __u8 data_len, __u8 *data);
1533struct hci_conn *hci_pa_create_sync(struct hci_dev *hdev, bdaddr_t *dst,
1534 __u8 dst_type, __u8 sid, struct bt_iso_qos *qos);
1535int hci_le_big_create_sync(struct hci_dev *hdev, struct hci_conn *hcon,
1536 struct bt_iso_qos *qos,
1537 __u16 sync_handle, __u8 num_bis, __u8 bis[]);
1538int hci_conn_check_link_mode(struct hci_conn *conn);
1539int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
1540int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
1541 bool initiator);
1542int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
1543
1544void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
1545
1546void hci_conn_failed(struct hci_conn *conn, u8 status);
1547u8 hci_conn_set_handle(struct hci_conn *conn, u16 handle);
1548
1549/*
1550 * hci_conn_get() and hci_conn_put() are used to control the life-time of an
1551 * "hci_conn" object. They do not guarantee that the hci_conn object is running,
1552 * working or anything else. They just guarantee that the object is available
1553 * and can be dereferenced. So you can use its locks, local variables and any
1554 * other constant data.
1555 * Before accessing runtime data, you _must_ lock the object and then check that
1556 * it is still running. As soon as you release the locks, the connection might
1557 * get dropped, though.
1558 *
1559 * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
1560 * how long the underlying connection is held. So every channel that runs on the
1561 * hci_conn object calls this to prevent the connection from disappearing. As
1562 * long as you hold a device, you must also guarantee that you have a valid
1563 * reference to the device via hci_conn_get() (or the initial reference from
1564 * hci_conn_add()).
1565 * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
1566 * break because nobody cares for that. But this means, we cannot use
1567 * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
1568 */
1569
1570static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
1571{
1572 get_device(dev: &conn->dev);
1573 return conn;
1574}
1575
1576static inline void hci_conn_put(struct hci_conn *conn)
1577{
1578 put_device(dev: &conn->dev);
1579}
1580
1581static inline struct hci_conn *hci_conn_hold(struct hci_conn *conn)
1582{
1583 BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1584
1585 atomic_inc(v: &conn->refcnt);
1586 cancel_delayed_work(dwork: &conn->disc_work);
1587
1588 return conn;
1589}
1590
1591static inline void hci_conn_drop(struct hci_conn *conn)
1592{
1593 BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1594
1595 if (atomic_dec_and_test(v: &conn->refcnt)) {
1596 unsigned long timeo;
1597
1598 switch (conn->type) {
1599 case ACL_LINK:
1600 case LE_LINK:
1601 cancel_delayed_work(dwork: &conn->idle_work);
1602 if (conn->state == BT_CONNECTED) {
1603 timeo = conn->disc_timeout;
1604 if (!conn->out)
1605 timeo *= 2;
1606 } else {
1607 timeo = 0;
1608 }
1609 break;
1610
1611 case AMP_LINK:
1612 timeo = conn->disc_timeout;
1613 break;
1614
1615 default:
1616 timeo = 0;
1617 break;
1618 }
1619
1620 cancel_delayed_work(dwork: &conn->disc_work);
1621 queue_delayed_work(wq: conn->hdev->workqueue,
1622 dwork: &conn->disc_work, delay: timeo);
1623 }
1624}
1625
1626/* ----- HCI Devices ----- */
1627static inline void hci_dev_put(struct hci_dev *d)
1628{
1629 BT_DBG("%s orig refcnt %d", d->name,
1630 kref_read(&d->dev.kobj.kref));
1631
1632 put_device(dev: &d->dev);
1633}
1634
1635static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
1636{
1637 BT_DBG("%s orig refcnt %d", d->name,
1638 kref_read(&d->dev.kobj.kref));
1639
1640 get_device(dev: &d->dev);
1641 return d;
1642}
1643
1644#define hci_dev_lock(d) mutex_lock(&d->lock)
1645#define hci_dev_unlock(d) mutex_unlock(&d->lock)
1646
1647#define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1648#define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1649
1650static inline void *hci_get_drvdata(struct hci_dev *hdev)
1651{
1652 return dev_get_drvdata(dev: &hdev->dev);
1653}
1654
1655static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1656{
1657 dev_set_drvdata(dev: &hdev->dev, data);
1658}
1659
1660static inline void *hci_get_priv(struct hci_dev *hdev)
1661{
1662 return (char *)hdev + sizeof(*hdev);
1663}
1664
1665struct hci_dev *hci_dev_get(int index);
1666struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1667
1668struct hci_dev *hci_alloc_dev_priv(int sizeof_priv);
1669
1670static inline struct hci_dev *hci_alloc_dev(void)
1671{
1672 return hci_alloc_dev_priv(sizeof_priv: 0);
1673}
1674
1675void hci_free_dev(struct hci_dev *hdev);
1676int hci_register_dev(struct hci_dev *hdev);
1677void hci_unregister_dev(struct hci_dev *hdev);
1678void hci_release_dev(struct hci_dev *hdev);
1679int hci_register_suspend_notifier(struct hci_dev *hdev);
1680int hci_unregister_suspend_notifier(struct hci_dev *hdev);
1681int hci_suspend_dev(struct hci_dev *hdev);
1682int hci_resume_dev(struct hci_dev *hdev);
1683int hci_reset_dev(struct hci_dev *hdev);
1684int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1685int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1686__printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1687__printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1688
1689static inline void hci_set_msft_opcode(struct hci_dev *hdev, __u16 opcode)
1690{
1691#if IS_ENABLED(CONFIG_BT_MSFTEXT)
1692 hdev->msft_opcode = opcode;
1693#endif
1694}
1695
1696static inline void hci_set_aosp_capable(struct hci_dev *hdev)
1697{
1698#if IS_ENABLED(CONFIG_BT_AOSPEXT)
1699 hdev->aosp_capable = true;
1700#endif
1701}
1702
1703static inline void hci_devcd_setup(struct hci_dev *hdev)
1704{
1705#ifdef CONFIG_DEV_COREDUMP
1706 INIT_WORK(&hdev->dump.dump_rx, hci_devcd_rx);
1707 INIT_DELAYED_WORK(&hdev->dump.dump_timeout, hci_devcd_timeout);
1708 skb_queue_head_init(list: &hdev->dump.dump_q);
1709#endif
1710}
1711
1712int hci_dev_open(__u16 dev);
1713int hci_dev_close(__u16 dev);
1714int hci_dev_do_close(struct hci_dev *hdev);
1715int hci_dev_reset(__u16 dev);
1716int hci_dev_reset_stat(__u16 dev);
1717int hci_dev_cmd(unsigned int cmd, void __user *arg);
1718int hci_get_dev_list(void __user *arg);
1719int hci_get_dev_info(void __user *arg);
1720int hci_get_conn_list(void __user *arg);
1721int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1722int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1723int hci_inquiry(void __user *arg);
1724
1725struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1726 bdaddr_t *bdaddr, u8 type);
1727struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
1728 struct list_head *list, bdaddr_t *bdaddr,
1729 u8 type);
1730struct bdaddr_list_with_flags *
1731hci_bdaddr_list_lookup_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1732 u8 type);
1733int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1734int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1735 u8 type, u8 *peer_irk, u8 *local_irk);
1736int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1737 u8 type, u32 flags);
1738int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1739int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1740 u8 type);
1741int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1742 u8 type);
1743void hci_bdaddr_list_clear(struct list_head *list);
1744
1745struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1746 bdaddr_t *addr, u8 addr_type);
1747struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1748 bdaddr_t *addr, u8 addr_type);
1749void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1750void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1751void hci_conn_params_free(struct hci_conn_params *param);
1752
1753void hci_pend_le_list_del_init(struct hci_conn_params *param);
1754void hci_pend_le_list_add(struct hci_conn_params *param,
1755 struct list_head *list);
1756struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1757 bdaddr_t *addr,
1758 u8 addr_type);
1759
1760void hci_uuids_clear(struct hci_dev *hdev);
1761
1762void hci_link_keys_clear(struct hci_dev *hdev);
1763struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1764struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1765 bdaddr_t *bdaddr, u8 *val, u8 type,
1766 u8 pin_len, bool *persistent);
1767struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1768 u8 addr_type, u8 type, u8 authenticated,
1769 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1770struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1771 u8 addr_type, u8 role);
1772int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1773void hci_smp_ltks_clear(struct hci_dev *hdev);
1774int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1775
1776struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1777struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1778 u8 addr_type);
1779struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1780 u8 addr_type, u8 val[16], bdaddr_t *rpa);
1781void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1782bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16]);
1783void hci_blocked_keys_clear(struct hci_dev *hdev);
1784void hci_smp_irks_clear(struct hci_dev *hdev);
1785
1786bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1787
1788void hci_remote_oob_data_clear(struct hci_dev *hdev);
1789struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1790 bdaddr_t *bdaddr, u8 bdaddr_type);
1791int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1792 u8 bdaddr_type, u8 *hash192, u8 *rand192,
1793 u8 *hash256, u8 *rand256);
1794int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1795 u8 bdaddr_type);
1796
1797void hci_adv_instances_clear(struct hci_dev *hdev);
1798struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1799struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1800struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1801 u32 flags, u16 adv_data_len, u8 *adv_data,
1802 u16 scan_rsp_len, u8 *scan_rsp_data,
1803 u16 timeout, u16 duration, s8 tx_power,
1804 u32 min_interval, u32 max_interval,
1805 u8 mesh_handle);
1806struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1807 u32 flags, u8 data_len, u8 *data,
1808 u32 min_interval, u32 max_interval);
1809int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1810 u16 adv_data_len, u8 *adv_data,
1811 u16 scan_rsp_len, u8 *scan_rsp_data);
1812int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1813void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired);
1814u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance);
1815bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance);
1816
1817void hci_adv_monitors_clear(struct hci_dev *hdev);
1818void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1819int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1820int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle);
1821int hci_remove_all_adv_monitor(struct hci_dev *hdev);
1822bool hci_is_adv_monitoring(struct hci_dev *hdev);
1823int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev);
1824
1825void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1826
1827void hci_init_sysfs(struct hci_dev *hdev);
1828void hci_conn_init_sysfs(struct hci_conn *conn);
1829void hci_conn_add_sysfs(struct hci_conn *conn);
1830void hci_conn_del_sysfs(struct hci_conn *conn);
1831
1832#define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1833#define GET_HCIDEV_DEV(hdev) ((hdev)->dev.parent)
1834
1835/* ----- LMP capabilities ----- */
1836#define lmp_encrypt_capable(dev) ((dev)->features[0][0] & LMP_ENCRYPT)
1837#define lmp_rswitch_capable(dev) ((dev)->features[0][0] & LMP_RSWITCH)
1838#define lmp_hold_capable(dev) ((dev)->features[0][0] & LMP_HOLD)
1839#define lmp_sniff_capable(dev) ((dev)->features[0][0] & LMP_SNIFF)
1840#define lmp_park_capable(dev) ((dev)->features[0][1] & LMP_PARK)
1841#define lmp_inq_rssi_capable(dev) ((dev)->features[0][3] & LMP_RSSI_INQ)
1842#define lmp_esco_capable(dev) ((dev)->features[0][3] & LMP_ESCO)
1843#define lmp_bredr_capable(dev) (!((dev)->features[0][4] & LMP_NO_BREDR))
1844#define lmp_le_capable(dev) ((dev)->features[0][4] & LMP_LE)
1845#define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1846#define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1847#define lmp_esco_2m_capable(dev) ((dev)->features[0][5] & LMP_EDR_ESCO_2M)
1848#define lmp_ext_inq_capable(dev) ((dev)->features[0][6] & LMP_EXT_INQ)
1849#define lmp_le_br_capable(dev) (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1850#define lmp_ssp_capable(dev) ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1851#define lmp_no_flush_capable(dev) ((dev)->features[0][6] & LMP_NO_FLUSH)
1852#define lmp_lsto_capable(dev) ((dev)->features[0][7] & LMP_LSTO)
1853#define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1854#define lmp_ext_feat_capable(dev) ((dev)->features[0][7] & LMP_EXTFEATURES)
1855#define lmp_transp_capable(dev) ((dev)->features[0][2] & LMP_TRANSPARENT)
1856#define lmp_edr_2m_capable(dev) ((dev)->features[0][3] & LMP_EDR_2M)
1857#define lmp_edr_3m_capable(dev) ((dev)->features[0][3] & LMP_EDR_3M)
1858#define lmp_edr_3slot_capable(dev) ((dev)->features[0][4] & LMP_EDR_3SLOT)
1859#define lmp_edr_5slot_capable(dev) ((dev)->features[0][5] & LMP_EDR_5SLOT)
1860
1861/* ----- Extended LMP capabilities ----- */
1862#define lmp_cpb_central_capable(dev) ((dev)->features[2][0] & LMP_CPB_CENTRAL)
1863#define lmp_cpb_peripheral_capable(dev) ((dev)->features[2][0] & LMP_CPB_PERIPHERAL)
1864#define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1865#define lmp_sync_scan_capable(dev) ((dev)->features[2][0] & LMP_SYNC_SCAN)
1866#define lmp_sc_capable(dev) ((dev)->features[2][1] & LMP_SC)
1867#define lmp_ping_capable(dev) ((dev)->features[2][1] & LMP_PING)
1868
1869/* ----- Host capabilities ----- */
1870#define lmp_host_ssp_capable(dev) ((dev)->features[1][0] & LMP_HOST_SSP)
1871#define lmp_host_sc_capable(dev) ((dev)->features[1][0] & LMP_HOST_SC)
1872#define lmp_host_le_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE))
1873#define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1874
1875#define hdev_is_powered(dev) (test_bit(HCI_UP, &(dev)->flags) && \
1876 !hci_dev_test_flag(dev, HCI_AUTO_OFF))
1877#define bredr_sc_enabled(dev) (lmp_sc_capable(dev) && \
1878 hci_dev_test_flag(dev, HCI_SC_ENABLED))
1879#define rpa_valid(dev) (bacmp(&dev->rpa, BDADDR_ANY) && \
1880 !hci_dev_test_flag(dev, HCI_RPA_EXPIRED))
1881#define adv_rpa_valid(adv) (bacmp(&adv->random_addr, BDADDR_ANY) && \
1882 !adv->rpa_expired)
1883
1884#define scan_1m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_1M) || \
1885 ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_1M))
1886
1887#define le_2m_capable(dev) (((dev)->le_features[1] & HCI_LE_PHY_2M))
1888
1889#define scan_2m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_2M) || \
1890 ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_2M))
1891
1892#define le_coded_capable(dev) (((dev)->le_features[1] & HCI_LE_PHY_CODED) && \
1893 !test_bit(HCI_QUIRK_BROKEN_LE_CODED, \
1894 &(dev)->quirks))
1895
1896#define scan_coded(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_CODED) || \
1897 ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_CODED))
1898
1899#define ll_privacy_capable(dev) ((dev)->le_features[0] & HCI_LE_LL_PRIVACY)
1900
1901/* Use LL Privacy based address resolution if supported */
1902#define use_ll_privacy(dev) (ll_privacy_capable(dev) && \
1903 hci_dev_test_flag(dev, HCI_ENABLE_LL_PRIVACY))
1904
1905#define privacy_mode_capable(dev) (use_ll_privacy(dev) && \
1906 (hdev->commands[39] & 0x04))
1907
1908/* Use enhanced synchronous connection if command is supported and its quirk
1909 * has not been set.
1910 */
1911#define enhanced_sync_conn_capable(dev) \
1912 (((dev)->commands[29] & 0x08) && \
1913 !test_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &(dev)->quirks))
1914
1915/* Use ext scanning if set ext scan param and ext scan enable is supported */
1916#define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \
1917 ((dev)->commands[37] & 0x40) && \
1918 !test_bit(HCI_QUIRK_BROKEN_EXT_SCAN, &(dev)->quirks))
1919
1920/* Use ext create connection if command is supported */
1921#define use_ext_conn(dev) ((dev)->commands[37] & 0x80)
1922
1923/* Extended advertising support */
1924#define ext_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_EXT_ADV))
1925
1926/* Maximum advertising length */
1927#define max_adv_len(dev) \
1928 (ext_adv_capable(dev) ? HCI_MAX_EXT_AD_LENGTH : HCI_MAX_AD_LENGTH)
1929
1930/* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 1789:
1931 *
1932 * C24: Mandatory if the LE Controller supports Connection State and either
1933 * LE Feature (LL Privacy) or LE Feature (Extended Advertising) is supported
1934 */
1935#define use_enhanced_conn_complete(dev) (ll_privacy_capable(dev) || \
1936 ext_adv_capable(dev))
1937
1938/* Periodic advertising support */
1939#define per_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_PERIODIC_ADV))
1940
1941/* CIS Master/Slave and BIS support */
1942#define iso_capable(dev) (cis_capable(dev) || bis_capable(dev))
1943#define cis_capable(dev) \
1944 (cis_central_capable(dev) || cis_peripheral_capable(dev))
1945#define cis_central_capable(dev) \
1946 ((dev)->le_features[3] & HCI_LE_CIS_CENTRAL)
1947#define cis_peripheral_capable(dev) \
1948 ((dev)->le_features[3] & HCI_LE_CIS_PERIPHERAL)
1949#define bis_capable(dev) ((dev)->le_features[3] & HCI_LE_ISO_BROADCASTER)
1950#define sync_recv_capable(dev) ((dev)->le_features[3] & HCI_LE_ISO_SYNC_RECEIVER)
1951
1952#define mws_transport_config_capable(dev) (((dev)->commands[30] & 0x08) && \
1953 (!test_bit(HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG, &(dev)->quirks)))
1954
1955/* ----- HCI protocols ----- */
1956#define HCI_PROTO_DEFER 0x01
1957
1958static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1959 __u8 type, __u8 *flags)
1960{
1961 switch (type) {
1962 case ACL_LINK:
1963 return l2cap_connect_ind(hdev, bdaddr);
1964
1965 case SCO_LINK:
1966 case ESCO_LINK:
1967 return sco_connect_ind(hdev, bdaddr, flags);
1968
1969 case ISO_LINK:
1970 return iso_connect_ind(hdev, bdaddr, flags);
1971
1972 default:
1973 BT_ERR("unknown link type %d", type);
1974 return -EINVAL;
1975 }
1976}
1977
1978static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1979{
1980 if (conn->type != ACL_LINK && conn->type != LE_LINK)
1981 return HCI_ERROR_REMOTE_USER_TERM;
1982
1983 return l2cap_disconn_ind(hcon: conn);
1984}
1985
1986/* ----- HCI callbacks ----- */
1987struct hci_cb {
1988 struct list_head list;
1989
1990 char *name;
1991
1992 void (*connect_cfm) (struct hci_conn *conn, __u8 status);
1993 void (*disconn_cfm) (struct hci_conn *conn, __u8 status);
1994 void (*security_cfm) (struct hci_conn *conn, __u8 status,
1995 __u8 encrypt);
1996 void (*key_change_cfm) (struct hci_conn *conn, __u8 status);
1997 void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
1998};
1999
2000static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
2001{
2002 struct hci_cb *cb;
2003
2004 mutex_lock(&hci_cb_list_lock);
2005 list_for_each_entry(cb, &hci_cb_list, list) {
2006 if (cb->connect_cfm)
2007 cb->connect_cfm(conn, status);
2008 }
2009 mutex_unlock(lock: &hci_cb_list_lock);
2010
2011 if (conn->connect_cfm_cb)
2012 conn->connect_cfm_cb(conn, status);
2013}
2014
2015static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
2016{
2017 struct hci_cb *cb;
2018
2019 mutex_lock(&hci_cb_list_lock);
2020 list_for_each_entry(cb, &hci_cb_list, list) {
2021 if (cb->disconn_cfm)
2022 cb->disconn_cfm(conn, reason);
2023 }
2024 mutex_unlock(lock: &hci_cb_list_lock);
2025
2026 if (conn->disconn_cfm_cb)
2027 conn->disconn_cfm_cb(conn, reason);
2028}
2029
2030static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
2031{
2032 struct hci_cb *cb;
2033 __u8 encrypt;
2034
2035 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
2036 return;
2037
2038 encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
2039
2040 mutex_lock(&hci_cb_list_lock);
2041 list_for_each_entry(cb, &hci_cb_list, list) {
2042 if (cb->security_cfm)
2043 cb->security_cfm(conn, status, encrypt);
2044 }
2045 mutex_unlock(lock: &hci_cb_list_lock);
2046
2047 if (conn->security_cfm_cb)
2048 conn->security_cfm_cb(conn, status);
2049}
2050
2051static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status)
2052{
2053 struct hci_cb *cb;
2054 __u8 encrypt;
2055
2056 if (conn->state == BT_CONFIG) {
2057 if (!status)
2058 conn->state = BT_CONNECTED;
2059
2060 hci_connect_cfm(conn, status);
2061 hci_conn_drop(conn);
2062 return;
2063 }
2064
2065 if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2066 encrypt = 0x00;
2067 else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
2068 encrypt = 0x02;
2069 else
2070 encrypt = 0x01;
2071
2072 if (!status) {
2073 if (conn->sec_level == BT_SECURITY_SDP)
2074 conn->sec_level = BT_SECURITY_LOW;
2075
2076 if (conn->pending_sec_level > conn->sec_level)
2077 conn->sec_level = conn->pending_sec_level;
2078 }
2079
2080 mutex_lock(&hci_cb_list_lock);
2081 list_for_each_entry(cb, &hci_cb_list, list) {
2082 if (cb->security_cfm)
2083 cb->security_cfm(conn, status, encrypt);
2084 }
2085 mutex_unlock(lock: &hci_cb_list_lock);
2086
2087 if (conn->security_cfm_cb)
2088 conn->security_cfm_cb(conn, status);
2089}
2090
2091static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
2092{
2093 struct hci_cb *cb;
2094
2095 mutex_lock(&hci_cb_list_lock);
2096 list_for_each_entry(cb, &hci_cb_list, list) {
2097 if (cb->key_change_cfm)
2098 cb->key_change_cfm(conn, status);
2099 }
2100 mutex_unlock(lock: &hci_cb_list_lock);
2101}
2102
2103static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
2104 __u8 role)
2105{
2106 struct hci_cb *cb;
2107
2108 mutex_lock(&hci_cb_list_lock);
2109 list_for_each_entry(cb, &hci_cb_list, list) {
2110 if (cb->role_switch_cfm)
2111 cb->role_switch_cfm(conn, status, role);
2112 }
2113 mutex_unlock(lock: &hci_cb_list_lock);
2114}
2115
2116static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
2117{
2118 if (addr_type != ADDR_LE_DEV_RANDOM)
2119 return false;
2120
2121 if ((bdaddr->b[5] & 0xc0) == 0x40)
2122 return true;
2123
2124 return false;
2125}
2126
2127static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
2128{
2129 if (addr_type == ADDR_LE_DEV_PUBLIC)
2130 return true;
2131
2132 /* Check for Random Static address type */
2133 if ((addr->b[5] & 0xc0) == 0xc0)
2134 return true;
2135
2136 return false;
2137}
2138
2139static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
2140 bdaddr_t *bdaddr, u8 addr_type)
2141{
2142 if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
2143 return NULL;
2144
2145 return hci_find_irk_by_rpa(hdev, rpa: bdaddr);
2146}
2147
2148static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
2149 u16 to_multiplier)
2150{
2151 u16 max_latency;
2152
2153 if (min > max || min < 6 || max > 3200)
2154 return -EINVAL;
2155
2156 if (to_multiplier < 10 || to_multiplier > 3200)
2157 return -EINVAL;
2158
2159 if (max >= to_multiplier * 8)
2160 return -EINVAL;
2161
2162 max_latency = (to_multiplier * 4 / max) - 1;
2163 if (latency > 499 || latency > max_latency)
2164 return -EINVAL;
2165
2166 return 0;
2167}
2168
2169int hci_register_cb(struct hci_cb *hcb);
2170int hci_unregister_cb(struct hci_cb *hcb);
2171
2172int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
2173 const void *param);
2174
2175int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
2176 const void *param);
2177void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
2178void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
2179void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb);
2180
2181void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
2182void *hci_recv_event_data(struct hci_dev *hdev, __u8 event);
2183
2184u32 hci_conn_get_phy(struct hci_conn *conn);
2185
2186/* ----- HCI Sockets ----- */
2187void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
2188void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
2189 int flag, struct sock *skip_sk);
2190void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
2191void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
2192 void *data, u16 data_len, ktime_t tstamp,
2193 int flag, struct sock *skip_sk);
2194
2195void hci_sock_dev_event(struct hci_dev *hdev, int event);
2196
2197#define HCI_MGMT_VAR_LEN BIT(0)
2198#define HCI_MGMT_NO_HDEV BIT(1)
2199#define HCI_MGMT_UNTRUSTED BIT(2)
2200#define HCI_MGMT_UNCONFIGURED BIT(3)
2201#define HCI_MGMT_HDEV_OPTIONAL BIT(4)
2202
2203struct hci_mgmt_handler {
2204 int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
2205 u16 data_len);
2206 size_t data_len;
2207 unsigned long flags;
2208};
2209
2210struct hci_mgmt_chan {
2211 struct list_head list;
2212 unsigned short channel;
2213 size_t handler_count;
2214 const struct hci_mgmt_handler *handlers;
2215 void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
2216};
2217
2218int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
2219void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
2220
2221/* Management interface */
2222#define DISCOV_TYPE_BREDR (BIT(BDADDR_BREDR))
2223#define DISCOV_TYPE_LE (BIT(BDADDR_LE_PUBLIC) | \
2224 BIT(BDADDR_LE_RANDOM))
2225#define DISCOV_TYPE_INTERLEAVED (BIT(BDADDR_BREDR) | \
2226 BIT(BDADDR_LE_PUBLIC) | \
2227 BIT(BDADDR_LE_RANDOM))
2228
2229/* These LE scan and inquiry parameters were chosen according to LE General
2230 * Discovery Procedure specification.
2231 */
2232#define DISCOV_LE_SCAN_WIN 0x12
2233#define DISCOV_LE_SCAN_INT 0x12
2234#define DISCOV_LE_TIMEOUT 10240 /* msec */
2235#define DISCOV_INTERLEAVED_TIMEOUT 5120 /* msec */
2236#define DISCOV_INTERLEAVED_INQUIRY_LEN 0x04
2237#define DISCOV_BREDR_INQUIRY_LEN 0x08
2238#define DISCOV_LE_RESTART_DELAY msecs_to_jiffies(200) /* msec */
2239#define DISCOV_LE_FAST_ADV_INT_MIN 0x00A0 /* 100 msec */
2240#define DISCOV_LE_FAST_ADV_INT_MAX 0x00F0 /* 150 msec */
2241#define DISCOV_LE_PER_ADV_INT_MIN 0x00A0 /* 200 msec */
2242#define DISCOV_LE_PER_ADV_INT_MAX 0x00A0 /* 200 msec */
2243#define DISCOV_LE_ADV_MESH_MIN 0x00A0 /* 100 msec */
2244#define DISCOV_LE_ADV_MESH_MAX 0x00A0 /* 100 msec */
2245#define INTERVAL_TO_MS(x) (((x) * 10) / 0x10)
2246
2247#define NAME_RESOLVE_DURATION msecs_to_jiffies(10240) /* 10.24 sec */
2248
2249void mgmt_fill_version_info(void *ver);
2250int mgmt_new_settings(struct hci_dev *hdev);
2251void mgmt_index_added(struct hci_dev *hdev);
2252void mgmt_index_removed(struct hci_dev *hdev);
2253void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
2254void mgmt_power_on(struct hci_dev *hdev, int err);
2255void __mgmt_power_off(struct hci_dev *hdev);
2256void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
2257 bool persistent);
2258void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
2259 u8 *name, u8 name_len);
2260void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
2261 u8 link_type, u8 addr_type, u8 reason,
2262 bool mgmt_connected);
2263void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
2264 u8 link_type, u8 addr_type, u8 status);
2265void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2266 u8 addr_type, u8 status);
2267void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
2268void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2269 u8 status);
2270void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2271 u8 status);
2272int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2273 u8 link_type, u8 addr_type, u32 value,
2274 u8 confirm_hint);
2275int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2276 u8 link_type, u8 addr_type, u8 status);
2277int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2278 u8 link_type, u8 addr_type, u8 status);
2279int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2280 u8 link_type, u8 addr_type);
2281int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2282 u8 link_type, u8 addr_type, u8 status);
2283int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2284 u8 link_type, u8 addr_type, u8 status);
2285int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
2286 u8 link_type, u8 addr_type, u32 passkey,
2287 u8 entered);
2288void mgmt_auth_failed(struct hci_conn *conn, u8 status);
2289void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
2290void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
2291 u8 status);
2292void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
2293void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
2294void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
2295void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2296 u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
2297 u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len,
2298 u64 instant);
2299void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2300 u8 addr_type, s8 rssi, u8 *name, u8 name_len);
2301void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
2302void mgmt_suspending(struct hci_dev *hdev, u8 state);
2303void mgmt_resuming(struct hci_dev *hdev, u8 reason, bdaddr_t *bdaddr,
2304 u8 addr_type);
2305bool mgmt_powering_down(struct hci_dev *hdev);
2306void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
2307void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
2308void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
2309 bool persistent);
2310void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
2311 u8 bdaddr_type, u8 store_hint, u16 min_interval,
2312 u16 max_interval, u16 latency, u16 timeout);
2313void mgmt_smp_complete(struct hci_conn *conn, bool complete);
2314bool mgmt_get_connectable(struct hci_dev *hdev);
2315u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
2316void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
2317 u8 instance);
2318void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
2319 u8 instance);
2320void mgmt_adv_monitor_removed(struct hci_dev *hdev, u16 handle);
2321int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip);
2322void mgmt_adv_monitor_device_lost(struct hci_dev *hdev, u16 handle,
2323 bdaddr_t *bdaddr, u8 addr_type);
2324
2325int hci_abort_conn(struct hci_conn *conn, u8 reason);
2326u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
2327 u16 to_multiplier);
2328void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
2329 __u8 ltk[16], __u8 key_size);
2330
2331void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2332 u8 *bdaddr_type);
2333
2334#define SCO_AIRMODE_MASK 0x0003
2335#define SCO_AIRMODE_CVSD 0x0000
2336#define SCO_AIRMODE_TRANSP 0x0003
2337
2338#define LOCAL_CODEC_ACL_MASK BIT(0)
2339#define LOCAL_CODEC_SCO_MASK BIT(1)
2340
2341#define TRANSPORT_TYPE_MAX 0x04
2342
2343#endif /* __HCI_CORE_H */
2344

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source code of linux/include/net/bluetooth/hci_core.h