xref: /openbmc/linux/include/net/bluetooth/hci_core.h (revision 44ad3baf1cca483e418b6aadf2d3994f69e0f16a)
1 /*
2    BlueZ - Bluetooth protocol stack for Linux
3    Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
4    Copyright 2023 NXP
5 
6    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7 
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License version 2 as
10    published by the Free Software Foundation;
11 
12    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 
21    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23    SOFTWARE IS DISCLAIMED.
24 */
25 
26 #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 */
45 struct 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 
56 struct 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 
69 struct 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 
101 enum 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 
120 enum suspended_state {
121 	BT_RUNNING = 0,
122 	BT_SUSPEND_DISCONNECT,
123 	BT_SUSPEND_CONFIGURE_WAKE,
124 };
125 
126 struct hci_conn_hash {
127 	struct list_head list;
128 	unsigned int     acl_num;
129 	unsigned int     sco_num;
130 	unsigned int     iso_num;
131 	unsigned int     le_num;
132 	unsigned int     le_num_peripheral;
133 };
134 
135 struct bdaddr_list {
136 	struct list_head list;
137 	bdaddr_t bdaddr;
138 	u8 bdaddr_type;
139 };
140 
141 struct codec_list {
142 	struct list_head list;
143 	u8	id;
144 	__u16	cid;
145 	__u16	vid;
146 	u8	transport;
147 	u8	num_caps;
148 	u32	len;
149 	struct hci_codec_caps caps[];
150 };
151 
152 struct bdaddr_list_with_irk {
153 	struct list_head list;
154 	bdaddr_t bdaddr;
155 	u8 bdaddr_type;
156 	u8 peer_irk[16];
157 	u8 local_irk[16];
158 };
159 
160 /* Bitmask of connection flags */
161 enum hci_conn_flags {
162 	HCI_CONN_FLAG_REMOTE_WAKEUP = 1,
163 	HCI_CONN_FLAG_DEVICE_PRIVACY = 2,
164 };
165 typedef u8 hci_conn_flags_t;
166 
167 struct bdaddr_list_with_flags {
168 	struct list_head list;
169 	bdaddr_t bdaddr;
170 	u8 bdaddr_type;
171 	hci_conn_flags_t flags;
172 };
173 
174 struct bt_uuid {
175 	struct list_head list;
176 	u8 uuid[16];
177 	u8 size;
178 	u8 svc_hint;
179 };
180 
181 struct blocked_key {
182 	struct list_head list;
183 	struct rcu_head rcu;
184 	u8 type;
185 	u8 val[16];
186 };
187 
188 struct smp_csrk {
189 	bdaddr_t bdaddr;
190 	u8 bdaddr_type;
191 	u8 type;
192 	u8 val[16];
193 };
194 
195 struct smp_ltk {
196 	struct list_head list;
197 	struct rcu_head rcu;
198 	bdaddr_t bdaddr;
199 	u8 bdaddr_type;
200 	u8 authenticated;
201 	u8 type;
202 	u8 enc_size;
203 	__le16 ediv;
204 	__le64 rand;
205 	u8 val[16];
206 };
207 
208 struct smp_irk {
209 	struct list_head list;
210 	struct rcu_head rcu;
211 	bdaddr_t rpa;
212 	bdaddr_t bdaddr;
213 	u8 addr_type;
214 	u8 val[16];
215 };
216 
217 struct link_key {
218 	struct list_head list;
219 	struct rcu_head rcu;
220 	bdaddr_t bdaddr;
221 	u8 type;
222 	u8 val[HCI_LINK_KEY_SIZE];
223 	u8 pin_len;
224 };
225 
226 struct oob_data {
227 	struct list_head list;
228 	bdaddr_t bdaddr;
229 	u8 bdaddr_type;
230 	u8 present;
231 	u8 hash192[16];
232 	u8 rand192[16];
233 	u8 hash256[16];
234 	u8 rand256[16];
235 };
236 
237 struct adv_info {
238 	struct list_head list;
239 	bool	enabled;
240 	bool	pending;
241 	bool	periodic;
242 	__u8	mesh;
243 	__u8	instance;
244 	__u32	flags;
245 	__u16	timeout;
246 	__u16	remaining_time;
247 	__u16	duration;
248 	__u16	adv_data_len;
249 	__u8	adv_data[HCI_MAX_EXT_AD_LENGTH];
250 	bool	adv_data_changed;
251 	__u16	scan_rsp_len;
252 	__u8	scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
253 	bool	scan_rsp_changed;
254 	__u16	per_adv_data_len;
255 	__u8	per_adv_data[HCI_MAX_PER_AD_LENGTH];
256 	__s8	tx_power;
257 	__u32   min_interval;
258 	__u32   max_interval;
259 	bdaddr_t	random_addr;
260 	bool 		rpa_expired;
261 	struct delayed_work	rpa_expired_cb;
262 };
263 
264 #define HCI_MAX_ADV_INSTANCES		5
265 #define HCI_DEFAULT_ADV_DURATION	2
266 
267 #define HCI_ADV_TX_POWER_NO_PREFERENCE 0x7F
268 
269 #define DATA_CMP(_d1, _l1, _d2, _l2) \
270 	(_l1 == _l2 ? memcmp(_d1, _d2, _l1) : _l1 - _l2)
271 
272 #define ADV_DATA_CMP(_adv, _data, _len) \
273 	DATA_CMP((_adv)->adv_data, (_adv)->adv_data_len, _data, _len)
274 
275 #define SCAN_RSP_CMP(_adv, _data, _len) \
276 	DATA_CMP((_adv)->scan_rsp_data, (_adv)->scan_rsp_len, _data, _len)
277 
278 struct monitored_device {
279 	struct list_head list;
280 
281 	bdaddr_t bdaddr;
282 	__u8     addr_type;
283 	__u16    handle;
284 	bool     notified;
285 };
286 
287 struct adv_pattern {
288 	struct list_head list;
289 	__u8 ad_type;
290 	__u8 offset;
291 	__u8 length;
292 	__u8 value[HCI_MAX_EXT_AD_LENGTH];
293 };
294 
295 struct adv_rssi_thresholds {
296 	__s8 low_threshold;
297 	__s8 high_threshold;
298 	__u16 low_threshold_timeout;
299 	__u16 high_threshold_timeout;
300 	__u8 sampling_period;
301 };
302 
303 struct adv_monitor {
304 	struct list_head patterns;
305 	struct adv_rssi_thresholds rssi;
306 	__u16		handle;
307 
308 	enum {
309 		ADV_MONITOR_STATE_NOT_REGISTERED,
310 		ADV_MONITOR_STATE_REGISTERED,
311 		ADV_MONITOR_STATE_OFFLOADED
312 	} state;
313 };
314 
315 #define HCI_MIN_ADV_MONITOR_HANDLE		1
316 #define HCI_MAX_ADV_MONITOR_NUM_HANDLES		32
317 #define HCI_MAX_ADV_MONITOR_NUM_PATTERNS	16
318 #define HCI_ADV_MONITOR_EXT_NONE		1
319 #define HCI_ADV_MONITOR_EXT_MSFT		2
320 
321 #define HCI_MAX_SHORT_NAME_LENGTH	10
322 
323 #define HCI_CONN_HANDLE_MAX		0x0eff
324 #define HCI_CONN_HANDLE_UNSET(_handle)	(_handle > HCI_CONN_HANDLE_MAX)
325 
326 /* Min encryption key size to match with SMP */
327 #define HCI_MIN_ENC_KEY_SIZE		7
328 
329 /* Default LE RPA expiry time, 15 minutes */
330 #define HCI_DEFAULT_RPA_TIMEOUT		(15 * 60)
331 
332 /* Default min/max age of connection information (1s/3s) */
333 #define DEFAULT_CONN_INFO_MIN_AGE	1000
334 #define DEFAULT_CONN_INFO_MAX_AGE	3000
335 /* Default authenticated payload timeout 30s */
336 #define DEFAULT_AUTH_PAYLOAD_TIMEOUT   0x0bb8
337 
338 #define HCI_MAX_PAGES	3
339 
340 struct hci_dev {
341 	struct list_head list;
342 	struct mutex	lock;
343 
344 	struct ida	unset_handle_ida;
345 
346 	const char	*name;
347 	unsigned long	flags;
348 	__u16		id;
349 	__u8		bus;
350 	bdaddr_t	bdaddr;
351 	bdaddr_t	setup_addr;
352 	bdaddr_t	public_addr;
353 	bdaddr_t	random_addr;
354 	bdaddr_t	static_addr;
355 	__u8		adv_addr_type;
356 	__u8		dev_name[HCI_MAX_NAME_LENGTH];
357 	__u8		short_name[HCI_MAX_SHORT_NAME_LENGTH];
358 	__u8		eir[HCI_MAX_EIR_LENGTH];
359 	__u16		appearance;
360 	__u8		dev_class[3];
361 	__u8		major_class;
362 	__u8		minor_class;
363 	__u8		max_page;
364 	__u8		features[HCI_MAX_PAGES][8];
365 	__u8		le_features[8];
366 	__u8		le_accept_list_size;
367 	__u8		le_resolv_list_size;
368 	__u8		le_num_of_adv_sets;
369 	__u8		le_states[8];
370 	__u8		mesh_ad_types[16];
371 	__u8		mesh_send_ref;
372 	__u8		commands[64];
373 	__u8		hci_ver;
374 	__u16		hci_rev;
375 	__u8		lmp_ver;
376 	__u16		manufacturer;
377 	__u16		lmp_subver;
378 	__u16		voice_setting;
379 	__u8		num_iac;
380 	__u16		stored_max_keys;
381 	__u16		stored_num_keys;
382 	__u8		io_capability;
383 	__s8		inq_tx_power;
384 	__u8		err_data_reporting;
385 	__u16		page_scan_interval;
386 	__u16		page_scan_window;
387 	__u8		page_scan_type;
388 	__u8		le_adv_channel_map;
389 	__u16		le_adv_min_interval;
390 	__u16		le_adv_max_interval;
391 	__u8		le_scan_type;
392 	__u16		le_scan_interval;
393 	__u16		le_scan_window;
394 	__u16		le_scan_int_suspend;
395 	__u16		le_scan_window_suspend;
396 	__u16		le_scan_int_discovery;
397 	__u16		le_scan_window_discovery;
398 	__u16		le_scan_int_adv_monitor;
399 	__u16		le_scan_window_adv_monitor;
400 	__u16		le_scan_int_connect;
401 	__u16		le_scan_window_connect;
402 	__u16		le_conn_min_interval;
403 	__u16		le_conn_max_interval;
404 	__u16		le_conn_latency;
405 	__u16		le_supv_timeout;
406 	__u16		le_def_tx_len;
407 	__u16		le_def_tx_time;
408 	__u16		le_max_tx_len;
409 	__u16		le_max_tx_time;
410 	__u16		le_max_rx_len;
411 	__u16		le_max_rx_time;
412 	__u8		le_max_key_size;
413 	__u8		le_min_key_size;
414 	__u16		discov_interleaved_timeout;
415 	__u16		conn_info_min_age;
416 	__u16		conn_info_max_age;
417 	__u16		auth_payload_timeout;
418 	__u8		min_enc_key_size;
419 	__u8		max_enc_key_size;
420 	__u8		pairing_opts;
421 	__u8		ssp_debug_mode;
422 	__u8		hw_error_code;
423 	__u32		clock;
424 	__u16		advmon_allowlist_duration;
425 	__u16		advmon_no_filter_duration;
426 	__u8		enable_advmon_interleave_scan;
427 
428 	__u16		devid_source;
429 	__u16		devid_vendor;
430 	__u16		devid_product;
431 	__u16		devid_version;
432 
433 	__u8		def_page_scan_type;
434 	__u16		def_page_scan_int;
435 	__u16		def_page_scan_window;
436 	__u8		def_inq_scan_type;
437 	__u16		def_inq_scan_int;
438 	__u16		def_inq_scan_window;
439 	__u16		def_br_lsto;
440 	__u16		def_page_timeout;
441 	__u16		def_multi_adv_rotation_duration;
442 	__u16		def_le_autoconnect_timeout;
443 	__s8		min_le_tx_power;
444 	__s8		max_le_tx_power;
445 
446 	__u16		pkt_type;
447 	__u16		esco_type;
448 	__u16		link_policy;
449 	__u16		link_mode;
450 
451 	__u32		idle_timeout;
452 	__u16		sniff_min_interval;
453 	__u16		sniff_max_interval;
454 
455 	unsigned int	auto_accept_delay;
456 
457 	unsigned long	quirks;
458 
459 	atomic_t	cmd_cnt;
460 	unsigned int	acl_cnt;
461 	unsigned int	sco_cnt;
462 	unsigned int	le_cnt;
463 	unsigned int	iso_cnt;
464 
465 	unsigned int	acl_mtu;
466 	unsigned int	sco_mtu;
467 	unsigned int	le_mtu;
468 	unsigned int	iso_mtu;
469 	unsigned int	acl_pkts;
470 	unsigned int	sco_pkts;
471 	unsigned int	le_pkts;
472 	unsigned int	iso_pkts;
473 
474 	unsigned long	acl_last_tx;
475 	unsigned long	sco_last_tx;
476 	unsigned long	le_last_tx;
477 
478 	__u8		le_tx_def_phys;
479 	__u8		le_rx_def_phys;
480 
481 	struct workqueue_struct	*workqueue;
482 	struct workqueue_struct	*req_workqueue;
483 
484 	struct work_struct	power_on;
485 	struct delayed_work	power_off;
486 	struct work_struct	error_reset;
487 	struct work_struct	cmd_sync_work;
488 	struct list_head	cmd_sync_work_list;
489 	struct mutex		cmd_sync_work_lock;
490 	struct mutex		unregister_lock;
491 	struct work_struct	cmd_sync_cancel_work;
492 	struct work_struct	reenable_adv_work;
493 
494 	__u16			discov_timeout;
495 	struct delayed_work	discov_off;
496 
497 	struct delayed_work	service_cache;
498 
499 	struct delayed_work	cmd_timer;
500 	struct delayed_work	ncmd_timer;
501 
502 	struct work_struct	rx_work;
503 	struct work_struct	cmd_work;
504 	struct work_struct	tx_work;
505 
506 	struct delayed_work	le_scan_disable;
507 	struct delayed_work	le_scan_restart;
508 
509 	struct sk_buff_head	rx_q;
510 	struct sk_buff_head	raw_q;
511 	struct sk_buff_head	cmd_q;
512 
513 	struct sk_buff		*sent_cmd;
514 	struct sk_buff		*recv_event;
515 
516 	struct mutex		req_lock;
517 	wait_queue_head_t	req_wait_q;
518 	__u32			req_status;
519 	__u32			req_result;
520 	struct sk_buff		*req_skb;
521 	struct sk_buff		*req_rsp;
522 
523 	void			*smp_data;
524 	void			*smp_bredr_data;
525 
526 	struct discovery_state	discovery;
527 
528 	int			discovery_old_state;
529 	bool			discovery_paused;
530 	int			advertising_old_state;
531 	bool			advertising_paused;
532 
533 	struct notifier_block	suspend_notifier;
534 	enum suspended_state	suspend_state_next;
535 	enum suspended_state	suspend_state;
536 	bool			scanning_paused;
537 	bool			suspended;
538 	u8			wake_reason;
539 	bdaddr_t		wake_addr;
540 	u8			wake_addr_type;
541 
542 	struct hci_conn_hash	conn_hash;
543 
544 	struct list_head	mesh_pending;
545 	struct mutex		mgmt_pending_lock;
546 	struct list_head	mgmt_pending;
547 	struct list_head	reject_list;
548 	struct list_head	accept_list;
549 	struct list_head	uuids;
550 	struct list_head	link_keys;
551 	struct list_head	long_term_keys;
552 	struct list_head	identity_resolving_keys;
553 	struct list_head	remote_oob_data;
554 	struct list_head	le_accept_list;
555 	struct list_head	le_resolv_list;
556 	struct list_head	le_conn_params;
557 	struct list_head	pend_le_conns;
558 	struct list_head	pend_le_reports;
559 	struct list_head	blocked_keys;
560 	struct list_head	local_codecs;
561 
562 	struct hci_dev_stats	stat;
563 
564 	atomic_t		promisc;
565 
566 	const char		*hw_info;
567 	const char		*fw_info;
568 	struct dentry		*debugfs;
569 
570 	struct hci_devcoredump	dump;
571 
572 	struct device		dev;
573 
574 	struct rfkill		*rfkill;
575 
576 	DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
577 	hci_conn_flags_t	conn_flags;
578 
579 	__s8			adv_tx_power;
580 	__u8			adv_data[HCI_MAX_EXT_AD_LENGTH];
581 	__u8			adv_data_len;
582 	__u8			scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
583 	__u8			scan_rsp_data_len;
584 	__u8			per_adv_data[HCI_MAX_PER_AD_LENGTH];
585 	__u8			per_adv_data_len;
586 
587 	struct list_head	adv_instances;
588 	unsigned int		adv_instance_cnt;
589 	__u8			cur_adv_instance;
590 	__u16			adv_instance_timeout;
591 	struct delayed_work	adv_instance_expire;
592 
593 	struct idr		adv_monitors_idr;
594 	unsigned int		adv_monitors_cnt;
595 
596 	__u8			irk[16];
597 	__u32			rpa_timeout;
598 	struct delayed_work	rpa_expired;
599 	bdaddr_t		rpa;
600 
601 	struct delayed_work	mesh_send_done;
602 
603 	enum {
604 		INTERLEAVE_SCAN_NONE,
605 		INTERLEAVE_SCAN_NO_FILTER,
606 		INTERLEAVE_SCAN_ALLOWLIST
607 	} interleave_scan_state;
608 
609 	struct delayed_work	interleave_scan;
610 
611 	struct list_head	monitored_devices;
612 	bool			advmon_pend_notify;
613 
614 #if IS_ENABLED(CONFIG_BT_LEDS)
615 	struct led_trigger	*power_led;
616 #endif
617 
618 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
619 	__u16			msft_opcode;
620 	void			*msft_data;
621 	bool			msft_curve_validity;
622 #endif
623 
624 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
625 	bool			aosp_capable;
626 	bool			aosp_quality_report;
627 #endif
628 
629 	int (*open)(struct hci_dev *hdev);
630 	int (*close)(struct hci_dev *hdev);
631 	int (*flush)(struct hci_dev *hdev);
632 	int (*setup)(struct hci_dev *hdev);
633 	int (*shutdown)(struct hci_dev *hdev);
634 	int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
635 	void (*notify)(struct hci_dev *hdev, unsigned int evt);
636 	void (*hw_error)(struct hci_dev *hdev, u8 code);
637 	int (*post_init)(struct hci_dev *hdev);
638 	int (*set_diag)(struct hci_dev *hdev, bool enable);
639 	int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
640 	void (*cmd_timeout)(struct hci_dev *hdev);
641 	void (*reset)(struct hci_dev *hdev);
642 	bool (*wakeup)(struct hci_dev *hdev);
643 	int (*set_quality_report)(struct hci_dev *hdev, bool enable);
644 	int (*get_data_path_id)(struct hci_dev *hdev, __u8 *data_path);
645 	int (*get_codec_config_data)(struct hci_dev *hdev, __u8 type,
646 				     struct bt_codec *codec, __u8 *vnd_len,
647 				     __u8 **vnd_data);
648 };
649 
650 #define HCI_PHY_HANDLE(handle)	(handle & 0xff)
651 
652 enum conn_reasons {
653 	CONN_REASON_PAIR_DEVICE,
654 	CONN_REASON_L2CAP_CHAN,
655 	CONN_REASON_SCO_CONNECT,
656 	CONN_REASON_ISO_CONNECT,
657 };
658 
659 struct hci_conn {
660 	struct list_head list;
661 
662 	atomic_t	refcnt;
663 
664 	bdaddr_t	dst;
665 	__u8		dst_type;
666 	bdaddr_t	src;
667 	__u8		src_type;
668 	bdaddr_t	init_addr;
669 	__u8		init_addr_type;
670 	bdaddr_t	resp_addr;
671 	__u8		resp_addr_type;
672 	__u8		adv_instance;
673 	__u16		handle;
674 	__u16		sync_handle;
675 	__u16		state;
676 	__u16		mtu;
677 	__u8		mode;
678 	__u8		type;
679 	__u8		role;
680 	bool		out;
681 	__u8		attempt;
682 	__u8		dev_class[3];
683 	__u8		features[HCI_MAX_PAGES][8];
684 	__u16		pkt_type;
685 	__u16		link_policy;
686 	__u8		key_type;
687 	__u8		auth_type;
688 	__u8		sec_level;
689 	__u8		pending_sec_level;
690 	__u8		pin_length;
691 	__u8		enc_key_size;
692 	__u8		io_capability;
693 	__u32		passkey_notify;
694 	__u8		passkey_entered;
695 	__u16		disc_timeout;
696 	__u16		conn_timeout;
697 	__u16		setting;
698 	__u16		auth_payload_timeout;
699 	__u16		le_conn_min_interval;
700 	__u16		le_conn_max_interval;
701 	__u16		le_conn_interval;
702 	__u16		le_conn_latency;
703 	__u16		le_supv_timeout;
704 	__u8		le_adv_data[HCI_MAX_EXT_AD_LENGTH];
705 	__u8		le_adv_data_len;
706 	__u8		le_per_adv_data[HCI_MAX_PER_AD_LENGTH];
707 	__u8		le_per_adv_data_len;
708 	__u8		le_tx_phy;
709 	__u8		le_rx_phy;
710 	__s8		rssi;
711 	__s8		tx_power;
712 	__s8		max_tx_power;
713 	struct bt_iso_qos iso_qos;
714 	unsigned long	flags;
715 
716 	enum conn_reasons conn_reason;
717 	__u8		abort_reason;
718 
719 	__u32		clock;
720 	__u16		clock_accuracy;
721 
722 	unsigned long	conn_info_timestamp;
723 
724 	__u8		remote_cap;
725 	__u8		remote_auth;
726 	__u8		remote_id;
727 
728 	unsigned int	sent;
729 
730 	struct sk_buff_head data_q;
731 	struct list_head chan_list;
732 
733 	struct delayed_work disc_work;
734 	struct delayed_work auto_accept_work;
735 	struct delayed_work idle_work;
736 	struct delayed_work le_conn_timeout;
737 
738 	struct device	dev;
739 	struct dentry	*debugfs;
740 
741 	struct hci_dev	*hdev;
742 	void		*l2cap_data;
743 	void		*sco_data;
744 	void		*iso_data;
745 
746 	struct list_head link_list;
747 	struct hci_conn	*parent;
748 	struct hci_link *link;
749 
750 	struct bt_codec codec;
751 
752 	void (*connect_cfm_cb)	(struct hci_conn *conn, u8 status);
753 	void (*security_cfm_cb)	(struct hci_conn *conn, u8 status);
754 	void (*disconn_cfm_cb)	(struct hci_conn *conn, u8 reason);
755 
756 	void (*cleanup)(struct hci_conn *conn);
757 };
758 
759 struct hci_link {
760 	struct list_head list;
761 	struct hci_conn *conn;
762 };
763 
764 struct hci_chan {
765 	struct list_head list;
766 	__u16 handle;
767 	struct hci_conn *conn;
768 	struct sk_buff_head data_q;
769 	unsigned int	sent;
770 	__u8		state;
771 };
772 
773 struct hci_conn_params {
774 	struct list_head list;
775 	struct list_head action;
776 
777 	bdaddr_t addr;
778 	u8 addr_type;
779 
780 	u16 conn_min_interval;
781 	u16 conn_max_interval;
782 	u16 conn_latency;
783 	u16 supervision_timeout;
784 
785 	enum {
786 		HCI_AUTO_CONN_DISABLED,
787 		HCI_AUTO_CONN_REPORT,
788 		HCI_AUTO_CONN_DIRECT,
789 		HCI_AUTO_CONN_ALWAYS,
790 		HCI_AUTO_CONN_LINK_LOSS,
791 		HCI_AUTO_CONN_EXPLICIT,
792 	} auto_connect;
793 
794 	struct hci_conn *conn;
795 	bool explicit_connect;
796 	/* Accessed without hdev->lock: */
797 	hci_conn_flags_t flags;
798 	u8  privacy_mode;
799 };
800 
801 extern struct list_head hci_dev_list;
802 extern struct list_head hci_cb_list;
803 extern rwlock_t hci_dev_list_lock;
804 extern struct mutex hci_cb_list_lock;
805 
806 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
807 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
808 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
809 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
810 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
811 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
812 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
813 
814 #define hci_dev_clear_volatile_flags(hdev)			\
815 	do {							\
816 		hci_dev_clear_flag(hdev, HCI_LE_SCAN);		\
817 		hci_dev_clear_flag(hdev, HCI_LE_ADV);		\
818 		hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);\
819 		hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);	\
820 		hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);	\
821 	} while (0)
822 
823 #define hci_dev_le_state_simultaneous(hdev) \
824 	(test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) && \
825 	 (hdev->le_states[4] & 0x08) &&	/* Central */ \
826 	 (hdev->le_states[4] & 0x40) &&	/* Peripheral */ \
827 	 (hdev->le_states[3] & 0x10))	/* Simultaneous */
828 
829 /* ----- HCI interface to upper protocols ----- */
830 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
831 int l2cap_disconn_ind(struct hci_conn *hcon);
832 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
833 
834 #if IS_ENABLED(CONFIG_BT_BREDR)
835 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
836 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
837 #else
sco_connect_ind(struct hci_dev * hdev,bdaddr_t * bdaddr,__u8 * flags)838 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
839 				  __u8 *flags)
840 {
841 	return 0;
842 }
843 
sco_recv_scodata(struct hci_conn * hcon,struct sk_buff * skb)844 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
845 {
846 }
847 #endif
848 
849 #if IS_ENABLED(CONFIG_BT_LE)
850 int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
851 void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
852 #else
iso_connect_ind(struct hci_dev * hdev,bdaddr_t * bdaddr,__u8 * flags)853 static inline int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
854 				  __u8 *flags)
855 {
856 	return 0;
857 }
iso_recv(struct hci_conn * hcon,struct sk_buff * skb,u16 flags)858 static inline void iso_recv(struct hci_conn *hcon, struct sk_buff *skb,
859 			    u16 flags)
860 {
861 }
862 #endif
863 
864 /* ----- Inquiry cache ----- */
865 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
866 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
867 
discovery_init(struct hci_dev * hdev)868 static inline void discovery_init(struct hci_dev *hdev)
869 {
870 	hdev->discovery.state = DISCOVERY_STOPPED;
871 	INIT_LIST_HEAD(&hdev->discovery.all);
872 	INIT_LIST_HEAD(&hdev->discovery.unknown);
873 	INIT_LIST_HEAD(&hdev->discovery.resolve);
874 	hdev->discovery.report_invalid_rssi = true;
875 	hdev->discovery.rssi = HCI_RSSI_INVALID;
876 }
877 
hci_discovery_filter_clear(struct hci_dev * hdev)878 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
879 {
880 	hdev->discovery.result_filtering = false;
881 	hdev->discovery.report_invalid_rssi = true;
882 	hdev->discovery.rssi = HCI_RSSI_INVALID;
883 	hdev->discovery.uuid_count = 0;
884 	kfree(hdev->discovery.uuids);
885 	hdev->discovery.uuids = NULL;
886 	hdev->discovery.scan_start = 0;
887 	hdev->discovery.scan_duration = 0;
888 }
889 
890 bool hci_discovery_active(struct hci_dev *hdev);
891 
892 void hci_discovery_set_state(struct hci_dev *hdev, int state);
893 
inquiry_cache_empty(struct hci_dev * hdev)894 static inline int inquiry_cache_empty(struct hci_dev *hdev)
895 {
896 	return list_empty(&hdev->discovery.all);
897 }
898 
inquiry_cache_age(struct hci_dev * hdev)899 static inline long inquiry_cache_age(struct hci_dev *hdev)
900 {
901 	struct discovery_state *c = &hdev->discovery;
902 	return jiffies - c->timestamp;
903 }
904 
inquiry_entry_age(struct inquiry_entry * e)905 static inline long inquiry_entry_age(struct inquiry_entry *e)
906 {
907 	return jiffies - e->timestamp;
908 }
909 
910 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
911 					       bdaddr_t *bdaddr);
912 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
913 						       bdaddr_t *bdaddr);
914 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
915 						       bdaddr_t *bdaddr,
916 						       int state);
917 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
918 				      struct inquiry_entry *ie);
919 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
920 			     bool name_known);
921 void hci_inquiry_cache_flush(struct hci_dev *hdev);
922 
923 /* ----- HCI Connections ----- */
924 enum {
925 	HCI_CONN_AUTH_PEND,
926 	HCI_CONN_ENCRYPT_PEND,
927 	HCI_CONN_RSWITCH_PEND,
928 	HCI_CONN_MODE_CHANGE_PEND,
929 	HCI_CONN_SCO_SETUP_PEND,
930 	HCI_CONN_MGMT_CONNECTED,
931 	HCI_CONN_SSP_ENABLED,
932 	HCI_CONN_SC_ENABLED,
933 	HCI_CONN_AES_CCM,
934 	HCI_CONN_POWER_SAVE,
935 	HCI_CONN_FLUSH_KEY,
936 	HCI_CONN_ENCRYPT,
937 	HCI_CONN_AUTH,
938 	HCI_CONN_SECURE,
939 	HCI_CONN_FIPS,
940 	HCI_CONN_STK_ENCRYPT,
941 	HCI_CONN_AUTH_INITIATOR,
942 	HCI_CONN_DROP,
943 	HCI_CONN_CANCEL,
944 	HCI_CONN_PARAM_REMOVAL_PEND,
945 	HCI_CONN_NEW_LINK_KEY,
946 	HCI_CONN_SCANNING,
947 	HCI_CONN_AUTH_FAILURE,
948 	HCI_CONN_PER_ADV,
949 	HCI_CONN_BIG_CREATED,
950 	HCI_CONN_CREATE_CIS,
951 	HCI_CONN_BIG_SYNC,
952 	HCI_CONN_BIG_SYNC_FAILED,
953 	HCI_CONN_PA_SYNC,
954 	HCI_CONN_PA_SYNC_FAILED,
955 };
956 
hci_conn_ssp_enabled(struct hci_conn * conn)957 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
958 {
959 	struct hci_dev *hdev = conn->hdev;
960 	return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
961 	       test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
962 }
963 
hci_conn_sc_enabled(struct hci_conn * conn)964 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
965 {
966 	struct hci_dev *hdev = conn->hdev;
967 	return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
968 	       test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
969 }
970 
hci_conn_hash_add(struct hci_dev * hdev,struct hci_conn * c)971 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
972 {
973 	struct hci_conn_hash *h = &hdev->conn_hash;
974 	list_add_tail_rcu(&c->list, &h->list);
975 	switch (c->type) {
976 	case ACL_LINK:
977 		h->acl_num++;
978 		break;
979 	case LE_LINK:
980 		h->le_num++;
981 		if (c->role == HCI_ROLE_SLAVE)
982 			h->le_num_peripheral++;
983 		break;
984 	case SCO_LINK:
985 	case ESCO_LINK:
986 		h->sco_num++;
987 		break;
988 	case ISO_LINK:
989 		h->iso_num++;
990 		break;
991 	}
992 }
993 
hci_conn_hash_del(struct hci_dev * hdev,struct hci_conn * c)994 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
995 {
996 	struct hci_conn_hash *h = &hdev->conn_hash;
997 
998 	list_del_rcu(&c->list);
999 	synchronize_rcu();
1000 
1001 	switch (c->type) {
1002 	case ACL_LINK:
1003 		h->acl_num--;
1004 		break;
1005 	case LE_LINK:
1006 		h->le_num--;
1007 		if (c->role == HCI_ROLE_SLAVE)
1008 			h->le_num_peripheral--;
1009 		break;
1010 	case SCO_LINK:
1011 	case ESCO_LINK:
1012 		h->sco_num--;
1013 		break;
1014 	case ISO_LINK:
1015 		h->iso_num--;
1016 		break;
1017 	}
1018 }
1019 
hci_conn_num(struct hci_dev * hdev,__u8 type)1020 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
1021 {
1022 	struct hci_conn_hash *h = &hdev->conn_hash;
1023 	switch (type) {
1024 	case ACL_LINK:
1025 		return h->acl_num;
1026 	case LE_LINK:
1027 		return h->le_num;
1028 	case SCO_LINK:
1029 	case ESCO_LINK:
1030 		return h->sco_num;
1031 	case ISO_LINK:
1032 		return h->iso_num;
1033 	default:
1034 		return 0;
1035 	}
1036 }
1037 
hci_conn_count(struct hci_dev * hdev)1038 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
1039 {
1040 	struct hci_conn_hash *c = &hdev->conn_hash;
1041 
1042 	return c->acl_num + c->sco_num + c->le_num + c->iso_num;
1043 }
1044 
hci_conn_valid(struct hci_dev * hdev,struct hci_conn * conn)1045 static inline bool hci_conn_valid(struct hci_dev *hdev, struct hci_conn *conn)
1046 {
1047 	struct hci_conn_hash *h = &hdev->conn_hash;
1048 	struct hci_conn  *c;
1049 
1050 	rcu_read_lock();
1051 
1052 	list_for_each_entry_rcu(c, &h->list, list) {
1053 		if (c == conn) {
1054 			rcu_read_unlock();
1055 			return true;
1056 		}
1057 	}
1058 	rcu_read_unlock();
1059 
1060 	return false;
1061 }
1062 
hci_conn_lookup_type(struct hci_dev * hdev,__u16 handle)1063 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
1064 {
1065 	struct hci_conn_hash *h = &hdev->conn_hash;
1066 	struct hci_conn *c;
1067 	__u8 type = INVALID_LINK;
1068 
1069 	rcu_read_lock();
1070 
1071 	list_for_each_entry_rcu(c, &h->list, list) {
1072 		if (c->handle == handle) {
1073 			type = c->type;
1074 			break;
1075 		}
1076 	}
1077 
1078 	rcu_read_unlock();
1079 
1080 	return type;
1081 }
1082 
hci_conn_hash_lookup_bis(struct hci_dev * hdev,bdaddr_t * ba,__u8 bis)1083 static inline struct hci_conn *hci_conn_hash_lookup_bis(struct hci_dev *hdev,
1084 							bdaddr_t *ba, __u8 bis)
1085 {
1086 	struct hci_conn_hash *h = &hdev->conn_hash;
1087 	struct hci_conn  *c;
1088 
1089 	rcu_read_lock();
1090 
1091 	list_for_each_entry_rcu(c, &h->list, list) {
1092 		if (bacmp(&c->dst, ba) || c->type != ISO_LINK)
1093 			continue;
1094 
1095 		if (c->iso_qos.bcast.bis == bis) {
1096 			rcu_read_unlock();
1097 			return c;
1098 		}
1099 	}
1100 	rcu_read_unlock();
1101 
1102 	return NULL;
1103 }
1104 
1105 static inline struct hci_conn *
hci_conn_hash_lookup_per_adv_bis(struct hci_dev * hdev,bdaddr_t * ba,__u8 big,__u8 bis)1106 hci_conn_hash_lookup_per_adv_bis(struct hci_dev *hdev,
1107 				 bdaddr_t *ba,
1108 				 __u8 big, __u8 bis)
1109 {
1110 	struct hci_conn_hash *h = &hdev->conn_hash;
1111 	struct hci_conn  *c;
1112 
1113 	rcu_read_lock();
1114 
1115 	list_for_each_entry_rcu(c, &h->list, list) {
1116 		if (bacmp(&c->dst, ba) || c->type != ISO_LINK ||
1117 			!test_bit(HCI_CONN_PER_ADV, &c->flags))
1118 			continue;
1119 
1120 		if (c->iso_qos.bcast.big == big &&
1121 		    c->iso_qos.bcast.bis == bis) {
1122 			rcu_read_unlock();
1123 			return c;
1124 		}
1125 	}
1126 	rcu_read_unlock();
1127 
1128 	return NULL;
1129 }
1130 
hci_conn_hash_lookup_handle(struct hci_dev * hdev,__u16 handle)1131 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
1132 								__u16 handle)
1133 {
1134 	struct hci_conn_hash *h = &hdev->conn_hash;
1135 	struct hci_conn  *c;
1136 
1137 	rcu_read_lock();
1138 
1139 	list_for_each_entry_rcu(c, &h->list, list) {
1140 		if (c->handle == handle) {
1141 			rcu_read_unlock();
1142 			return c;
1143 		}
1144 	}
1145 	rcu_read_unlock();
1146 
1147 	return NULL;
1148 }
1149 
hci_conn_hash_lookup_ba(struct hci_dev * hdev,__u8 type,bdaddr_t * ba)1150 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
1151 							__u8 type, bdaddr_t *ba)
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 (c->type == type && !bacmp(&c->dst, ba)) {
1160 			rcu_read_unlock();
1161 			return c;
1162 		}
1163 	}
1164 
1165 	rcu_read_unlock();
1166 
1167 	return NULL;
1168 }
1169 
hci_conn_hash_lookup_le(struct hci_dev * hdev,bdaddr_t * ba,__u8 ba_type)1170 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
1171 						       bdaddr_t *ba,
1172 						       __u8 ba_type)
1173 {
1174 	struct hci_conn_hash *h = &hdev->conn_hash;
1175 	struct hci_conn  *c;
1176 
1177 	rcu_read_lock();
1178 
1179 	list_for_each_entry_rcu(c, &h->list, list) {
1180 		if (c->type != LE_LINK)
1181 		       continue;
1182 
1183 		if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
1184 			rcu_read_unlock();
1185 			return c;
1186 		}
1187 	}
1188 
1189 	rcu_read_unlock();
1190 
1191 	return NULL;
1192 }
1193 
hci_conn_hash_lookup_cis(struct hci_dev * hdev,bdaddr_t * ba,__u8 ba_type,__u8 cig,__u8 id)1194 static inline struct hci_conn *hci_conn_hash_lookup_cis(struct hci_dev *hdev,
1195 							bdaddr_t *ba,
1196 							__u8 ba_type,
1197 							__u8 cig,
1198 							__u8 id)
1199 {
1200 	struct hci_conn_hash *h = &hdev->conn_hash;
1201 	struct hci_conn  *c;
1202 
1203 	rcu_read_lock();
1204 
1205 	list_for_each_entry_rcu(c, &h->list, list) {
1206 		if (c->type != ISO_LINK || !bacmp(&c->dst, BDADDR_ANY))
1207 			continue;
1208 
1209 		/* Match CIG ID if set */
1210 		if (cig != c->iso_qos.ucast.cig)
1211 			continue;
1212 
1213 		/* Match CIS ID if set */
1214 		if (id != c->iso_qos.ucast.cis)
1215 			continue;
1216 
1217 		/* Match destination address if set */
1218 		if (!ba || (ba_type == c->dst_type && !bacmp(&c->dst, ba))) {
1219 			rcu_read_unlock();
1220 			return c;
1221 		}
1222 	}
1223 
1224 	rcu_read_unlock();
1225 
1226 	return NULL;
1227 }
1228 
hci_conn_hash_lookup_cig(struct hci_dev * hdev,__u8 handle)1229 static inline struct hci_conn *hci_conn_hash_lookup_cig(struct hci_dev *hdev,
1230 							__u8 handle)
1231 {
1232 	struct hci_conn_hash *h = &hdev->conn_hash;
1233 	struct hci_conn  *c;
1234 
1235 	rcu_read_lock();
1236 
1237 	list_for_each_entry_rcu(c, &h->list, list) {
1238 		if (c->type != ISO_LINK || !bacmp(&c->dst, BDADDR_ANY))
1239 			continue;
1240 
1241 		if (handle == c->iso_qos.ucast.cig) {
1242 			rcu_read_unlock();
1243 			return c;
1244 		}
1245 	}
1246 
1247 	rcu_read_unlock();
1248 
1249 	return NULL;
1250 }
1251 
hci_conn_hash_lookup_big(struct hci_dev * hdev,__u8 handle)1252 static inline struct hci_conn *hci_conn_hash_lookup_big(struct hci_dev *hdev,
1253 							__u8 handle)
1254 {
1255 	struct hci_conn_hash *h = &hdev->conn_hash;
1256 	struct hci_conn  *c;
1257 
1258 	rcu_read_lock();
1259 
1260 	list_for_each_entry_rcu(c, &h->list, list) {
1261 		if (bacmp(&c->dst, BDADDR_ANY) || c->type != ISO_LINK)
1262 			continue;
1263 
1264 		if (handle == c->iso_qos.bcast.big) {
1265 			rcu_read_unlock();
1266 			return c;
1267 		}
1268 	}
1269 
1270 	rcu_read_unlock();
1271 
1272 	return NULL;
1273 }
1274 
hci_conn_hash_lookup_big_any_dst(struct hci_dev * hdev,__u8 handle)1275 static inline struct hci_conn *hci_conn_hash_lookup_big_any_dst(struct hci_dev *hdev,
1276 							__u8 handle)
1277 {
1278 	struct hci_conn_hash *h = &hdev->conn_hash;
1279 	struct hci_conn  *c;
1280 
1281 	rcu_read_lock();
1282 
1283 	list_for_each_entry_rcu(c, &h->list, list) {
1284 		if (c->type != ISO_LINK)
1285 			continue;
1286 
1287 		if (handle != BT_ISO_QOS_BIG_UNSET && handle == c->iso_qos.bcast.big) {
1288 			rcu_read_unlock();
1289 			return c;
1290 		}
1291 	}
1292 
1293 	rcu_read_unlock();
1294 
1295 	return NULL;
1296 }
1297 
1298 static inline struct hci_conn *
hci_conn_hash_lookup_big_state(struct hci_dev * hdev,__u8 handle,__u16 state)1299 hci_conn_hash_lookup_big_state(struct hci_dev *hdev, __u8 handle,  __u16 state)
1300 {
1301 	struct hci_conn_hash *h = &hdev->conn_hash;
1302 	struct hci_conn  *c;
1303 
1304 	rcu_read_lock();
1305 
1306 	list_for_each_entry_rcu(c, &h->list, list) {
1307 		if (bacmp(&c->dst, BDADDR_ANY) || c->type != ISO_LINK ||
1308 			c->state != state)
1309 			continue;
1310 
1311 		if (handle == c->iso_qos.bcast.big) {
1312 			rcu_read_unlock();
1313 			return c;
1314 		}
1315 	}
1316 
1317 	rcu_read_unlock();
1318 
1319 	return NULL;
1320 }
1321 
1322 static inline struct hci_conn *
hci_conn_hash_lookup_pa_sync_big_handle(struct hci_dev * hdev,__u8 big)1323 hci_conn_hash_lookup_pa_sync_big_handle(struct hci_dev *hdev, __u8 big)
1324 {
1325 	struct hci_conn_hash *h = &hdev->conn_hash;
1326 	struct hci_conn  *c;
1327 
1328 	rcu_read_lock();
1329 
1330 	list_for_each_entry_rcu(c, &h->list, list) {
1331 		if (c->type != ISO_LINK ||
1332 			!test_bit(HCI_CONN_PA_SYNC, &c->flags))
1333 			continue;
1334 
1335 		if (c->iso_qos.bcast.big == big) {
1336 			rcu_read_unlock();
1337 			return c;
1338 		}
1339 	}
1340 	rcu_read_unlock();
1341 
1342 	return NULL;
1343 }
1344 
1345 static inline struct hci_conn *
hci_conn_hash_lookup_pa_sync_handle(struct hci_dev * hdev,__u16 sync_handle)1346 hci_conn_hash_lookup_pa_sync_handle(struct hci_dev *hdev, __u16 sync_handle)
1347 {
1348 	struct hci_conn_hash *h = &hdev->conn_hash;
1349 	struct hci_conn  *c;
1350 
1351 	rcu_read_lock();
1352 
1353 	list_for_each_entry_rcu(c, &h->list, list) {
1354 		if (c->type != ISO_LINK ||
1355 			!test_bit(HCI_CONN_PA_SYNC, &c->flags))
1356 			continue;
1357 
1358 		if (c->sync_handle == sync_handle) {
1359 			rcu_read_unlock();
1360 			return c;
1361 		}
1362 	}
1363 	rcu_read_unlock();
1364 
1365 	return NULL;
1366 }
1367 
hci_conn_hash_lookup_state(struct hci_dev * hdev,__u8 type,__u16 state)1368 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
1369 							__u8 type, __u16 state)
1370 {
1371 	struct hci_conn_hash *h = &hdev->conn_hash;
1372 	struct hci_conn  *c;
1373 
1374 	rcu_read_lock();
1375 
1376 	list_for_each_entry_rcu(c, &h->list, list) {
1377 		if (c->type == type && c->state == state) {
1378 			rcu_read_unlock();
1379 			return c;
1380 		}
1381 	}
1382 
1383 	rcu_read_unlock();
1384 
1385 	return NULL;
1386 }
1387 
1388 typedef void (*hci_conn_func_t)(struct hci_conn *conn, void *data);
hci_conn_hash_list_state(struct hci_dev * hdev,hci_conn_func_t func,__u8 type,__u16 state,void * data)1389 static inline void hci_conn_hash_list_state(struct hci_dev *hdev,
1390 					    hci_conn_func_t func, __u8 type,
1391 					    __u16 state, void *data)
1392 {
1393 	struct hci_conn_hash *h = &hdev->conn_hash;
1394 	struct hci_conn  *c;
1395 
1396 	if (!func)
1397 		return;
1398 
1399 	rcu_read_lock();
1400 
1401 	list_for_each_entry_rcu(c, &h->list, list) {
1402 		if (c->type == type && c->state == state)
1403 			func(c, data);
1404 	}
1405 
1406 	rcu_read_unlock();
1407 }
1408 
hci_lookup_le_connect(struct hci_dev * hdev)1409 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
1410 {
1411 	struct hci_conn_hash *h = &hdev->conn_hash;
1412 	struct hci_conn  *c;
1413 
1414 	rcu_read_lock();
1415 
1416 	list_for_each_entry_rcu(c, &h->list, list) {
1417 		if (c->type == LE_LINK && c->state == BT_CONNECT &&
1418 		    !test_bit(HCI_CONN_SCANNING, &c->flags)) {
1419 			rcu_read_unlock();
1420 			return c;
1421 		}
1422 	}
1423 
1424 	rcu_read_unlock();
1425 
1426 	return NULL;
1427 }
1428 
1429 /* Returns true if an le connection is in the scanning state */
hci_is_le_conn_scanning(struct hci_dev * hdev)1430 static inline bool hci_is_le_conn_scanning(struct hci_dev *hdev)
1431 {
1432 	struct hci_conn_hash *h = &hdev->conn_hash;
1433 	struct hci_conn  *c;
1434 
1435 	rcu_read_lock();
1436 
1437 	list_for_each_entry_rcu(c, &h->list, list) {
1438 		if (c->type == LE_LINK && c->state == BT_CONNECT &&
1439 		    test_bit(HCI_CONN_SCANNING, &c->flags)) {
1440 			rcu_read_unlock();
1441 			return true;
1442 		}
1443 	}
1444 
1445 	rcu_read_unlock();
1446 
1447 	return false;
1448 }
1449 
1450 int hci_disconnect(struct hci_conn *conn, __u8 reason);
1451 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
1452 void hci_sco_setup(struct hci_conn *conn, __u8 status);
1453 bool hci_iso_setup_path(struct hci_conn *conn);
1454 int hci_le_create_cis_pending(struct hci_dev *hdev);
1455 int hci_conn_check_create_cis(struct hci_conn *conn);
1456 
1457 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
1458 			      u8 role, u16 handle);
1459 struct hci_conn *hci_conn_add_unset(struct hci_dev *hdev, int type,
1460 				    bdaddr_t *dst, u8 role);
1461 void hci_conn_del(struct hci_conn *conn);
1462 void hci_conn_hash_flush(struct hci_dev *hdev);
1463 
1464 struct hci_chan *hci_chan_create(struct hci_conn *conn);
1465 void hci_chan_del(struct hci_chan *chan);
1466 void hci_chan_list_flush(struct hci_conn *conn);
1467 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
1468 
1469 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1470 				     u8 dst_type, u8 sec_level,
1471 				     u16 conn_timeout,
1472 				     enum conn_reasons conn_reason);
1473 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
1474 				u8 dst_type, bool dst_resolved, u8 sec_level,
1475 				u16 conn_timeout, u8 role);
1476 void hci_connect_le_scan_cleanup(struct hci_conn *conn, u8 status);
1477 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1478 				 u8 sec_level, u8 auth_type,
1479 				 enum conn_reasons conn_reason);
1480 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1481 				 __u16 setting, struct bt_codec *codec);
1482 struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
1483 			      __u8 dst_type, struct bt_iso_qos *qos);
1484 struct hci_conn *hci_bind_bis(struct hci_dev *hdev, bdaddr_t *dst,
1485 			      struct bt_iso_qos *qos,
1486 			      __u8 base_len, __u8 *base);
1487 struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
1488 				 __u8 dst_type, struct bt_iso_qos *qos);
1489 struct hci_conn *hci_connect_bis(struct hci_dev *hdev, bdaddr_t *dst,
1490 				 __u8 dst_type, struct bt_iso_qos *qos,
1491 				 __u8 data_len, __u8 *data);
1492 int hci_pa_create_sync(struct hci_dev *hdev, bdaddr_t *dst, __u8 dst_type,
1493 		       __u8 sid, struct bt_iso_qos *qos);
1494 int hci_le_big_create_sync(struct hci_dev *hdev, struct hci_conn *hcon,
1495 			   struct bt_iso_qos *qos,
1496 			   __u16 sync_handle, __u8 num_bis, __u8 bis[]);
1497 int hci_conn_check_link_mode(struct hci_conn *conn);
1498 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
1499 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
1500 		      bool initiator);
1501 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
1502 
1503 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
1504 
1505 void hci_conn_failed(struct hci_conn *conn, u8 status);
1506 u8 hci_conn_set_handle(struct hci_conn *conn, u16 handle);
1507 
1508 /*
1509  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
1510  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
1511  * working or anything else. They just guarantee that the object is available
1512  * and can be dereferenced. So you can use its locks, local variables and any
1513  * other constant data.
1514  * Before accessing runtime data, you _must_ lock the object and then check that
1515  * it is still running. As soon as you release the locks, the connection might
1516  * get dropped, though.
1517  *
1518  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
1519  * how long the underlying connection is held. So every channel that runs on the
1520  * hci_conn object calls this to prevent the connection from disappearing. As
1521  * long as you hold a device, you must also guarantee that you have a valid
1522  * reference to the device via hci_conn_get() (or the initial reference from
1523  * hci_conn_add()).
1524  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
1525  * break because nobody cares for that. But this means, we cannot use
1526  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
1527  */
1528 
hci_conn_get(struct hci_conn * conn)1529 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
1530 {
1531 	get_device(&conn->dev);
1532 	return conn;
1533 }
1534 
hci_conn_put(struct hci_conn * conn)1535 static inline void hci_conn_put(struct hci_conn *conn)
1536 {
1537 	put_device(&conn->dev);
1538 }
1539 
hci_conn_hold(struct hci_conn * conn)1540 static inline struct hci_conn *hci_conn_hold(struct hci_conn *conn)
1541 {
1542 	BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1543 
1544 	atomic_inc(&conn->refcnt);
1545 	cancel_delayed_work(&conn->disc_work);
1546 
1547 	return conn;
1548 }
1549 
hci_conn_drop(struct hci_conn * conn)1550 static inline void hci_conn_drop(struct hci_conn *conn)
1551 {
1552 	BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1553 
1554 	if (atomic_dec_and_test(&conn->refcnt)) {
1555 		unsigned long timeo;
1556 
1557 		switch (conn->type) {
1558 		case ACL_LINK:
1559 		case LE_LINK:
1560 			cancel_delayed_work(&conn->idle_work);
1561 			if (conn->state == BT_CONNECTED) {
1562 				timeo = conn->disc_timeout;
1563 				if (!conn->out)
1564 					timeo *= 2;
1565 			} else {
1566 				timeo = 0;
1567 			}
1568 			break;
1569 
1570 		default:
1571 			timeo = 0;
1572 			break;
1573 		}
1574 
1575 		cancel_delayed_work(&conn->disc_work);
1576 		queue_delayed_work(conn->hdev->workqueue,
1577 				   &conn->disc_work, timeo);
1578 	}
1579 }
1580 
1581 /* ----- HCI Devices ----- */
hci_dev_put(struct hci_dev * d)1582 static inline void hci_dev_put(struct hci_dev *d)
1583 {
1584 	BT_DBG("%s orig refcnt %d", d->name,
1585 	       kref_read(&d->dev.kobj.kref));
1586 
1587 	put_device(&d->dev);
1588 }
1589 
hci_dev_hold(struct hci_dev * d)1590 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
1591 {
1592 	BT_DBG("%s orig refcnt %d", d->name,
1593 	       kref_read(&d->dev.kobj.kref));
1594 
1595 	get_device(&d->dev);
1596 	return d;
1597 }
1598 
1599 #define hci_dev_lock(d)		mutex_lock(&d->lock)
1600 #define hci_dev_unlock(d)	mutex_unlock(&d->lock)
1601 
1602 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1603 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1604 
hci_get_drvdata(struct hci_dev * hdev)1605 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1606 {
1607 	return dev_get_drvdata(&hdev->dev);
1608 }
1609 
hci_set_drvdata(struct hci_dev * hdev,void * data)1610 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1611 {
1612 	dev_set_drvdata(&hdev->dev, data);
1613 }
1614 
hci_get_priv(struct hci_dev * hdev)1615 static inline void *hci_get_priv(struct hci_dev *hdev)
1616 {
1617 	return (char *)hdev + sizeof(*hdev);
1618 }
1619 
1620 struct hci_dev *hci_dev_get(int index);
1621 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1622 
1623 struct hci_dev *hci_alloc_dev_priv(int sizeof_priv);
1624 
hci_alloc_dev(void)1625 static inline struct hci_dev *hci_alloc_dev(void)
1626 {
1627 	return hci_alloc_dev_priv(0);
1628 }
1629 
1630 void hci_free_dev(struct hci_dev *hdev);
1631 int hci_register_dev(struct hci_dev *hdev);
1632 void hci_unregister_dev(struct hci_dev *hdev);
1633 void hci_release_dev(struct hci_dev *hdev);
1634 int hci_register_suspend_notifier(struct hci_dev *hdev);
1635 int hci_unregister_suspend_notifier(struct hci_dev *hdev);
1636 int hci_suspend_dev(struct hci_dev *hdev);
1637 int hci_resume_dev(struct hci_dev *hdev);
1638 int hci_reset_dev(struct hci_dev *hdev);
1639 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1640 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1641 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1642 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1643 
hci_set_msft_opcode(struct hci_dev * hdev,__u16 opcode)1644 static inline void hci_set_msft_opcode(struct hci_dev *hdev, __u16 opcode)
1645 {
1646 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
1647 	hdev->msft_opcode = opcode;
1648 #endif
1649 }
1650 
hci_set_aosp_capable(struct hci_dev * hdev)1651 static inline void hci_set_aosp_capable(struct hci_dev *hdev)
1652 {
1653 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
1654 	hdev->aosp_capable = true;
1655 #endif
1656 }
1657 
hci_devcd_setup(struct hci_dev * hdev)1658 static inline void hci_devcd_setup(struct hci_dev *hdev)
1659 {
1660 #ifdef CONFIG_DEV_COREDUMP
1661 	INIT_WORK(&hdev->dump.dump_rx, hci_devcd_rx);
1662 	INIT_DELAYED_WORK(&hdev->dump.dump_timeout, hci_devcd_timeout);
1663 	skb_queue_head_init(&hdev->dump.dump_q);
1664 #endif
1665 }
1666 
1667 int hci_dev_open(__u16 dev);
1668 int hci_dev_close(__u16 dev);
1669 int hci_dev_do_close(struct hci_dev *hdev);
1670 int hci_dev_reset(__u16 dev);
1671 int hci_dev_reset_stat(__u16 dev);
1672 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1673 int hci_get_dev_list(void __user *arg);
1674 int hci_get_dev_info(void __user *arg);
1675 int hci_get_conn_list(void __user *arg);
1676 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1677 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1678 int hci_inquiry(void __user *arg);
1679 
1680 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1681 					   bdaddr_t *bdaddr, u8 type);
1682 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
1683 				    struct list_head *list, bdaddr_t *bdaddr,
1684 				    u8 type);
1685 struct bdaddr_list_with_flags *
1686 hci_bdaddr_list_lookup_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1687 				  u8 type);
1688 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1689 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1690 				 u8 type, u8 *peer_irk, u8 *local_irk);
1691 int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1692 				   u8 type, u32 flags);
1693 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1694 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1695 				 u8 type);
1696 int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1697 				   u8 type);
1698 void hci_bdaddr_list_clear(struct list_head *list);
1699 
1700 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1701 					       bdaddr_t *addr, u8 addr_type);
1702 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1703 					    bdaddr_t *addr, u8 addr_type);
1704 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1705 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1706 void hci_conn_params_free(struct hci_conn_params *param);
1707 
1708 void hci_pend_le_list_del_init(struct hci_conn_params *param);
1709 void hci_pend_le_list_add(struct hci_conn_params *param,
1710 			  struct list_head *list);
1711 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1712 						  bdaddr_t *addr,
1713 						  u8 addr_type);
1714 
1715 void hci_uuids_clear(struct hci_dev *hdev);
1716 
1717 void hci_link_keys_clear(struct hci_dev *hdev);
1718 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1719 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1720 				  bdaddr_t *bdaddr, u8 *val, u8 type,
1721 				  u8 pin_len, bool *persistent);
1722 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1723 			    u8 addr_type, u8 type, u8 authenticated,
1724 			    u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1725 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1726 			     u8 addr_type, u8 role);
1727 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1728 void hci_smp_ltks_clear(struct hci_dev *hdev);
1729 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1730 
1731 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1732 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1733 				     u8 addr_type);
1734 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1735 			    u8 addr_type, u8 val[16], bdaddr_t *rpa);
1736 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1737 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16]);
1738 void hci_blocked_keys_clear(struct hci_dev *hdev);
1739 void hci_smp_irks_clear(struct hci_dev *hdev);
1740 
1741 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1742 
1743 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1744 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1745 					  bdaddr_t *bdaddr, u8 bdaddr_type);
1746 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1747 			    u8 bdaddr_type, u8 *hash192, u8 *rand192,
1748 			    u8 *hash256, u8 *rand256);
1749 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1750 			       u8 bdaddr_type);
1751 
1752 void hci_adv_instances_clear(struct hci_dev *hdev);
1753 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1754 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1755 struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1756 				      u32 flags, u16 adv_data_len, u8 *adv_data,
1757 				      u16 scan_rsp_len, u8 *scan_rsp_data,
1758 				      u16 timeout, u16 duration, s8 tx_power,
1759 				      u32 min_interval, u32 max_interval,
1760 				      u8 mesh_handle);
1761 struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1762 				      u32 flags, u8 data_len, u8 *data,
1763 				      u32 min_interval, u32 max_interval);
1764 int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1765 			 u16 adv_data_len, u8 *adv_data,
1766 			 u16 scan_rsp_len, u8 *scan_rsp_data);
1767 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1768 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired);
1769 u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance);
1770 bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance);
1771 
1772 void hci_adv_monitors_clear(struct hci_dev *hdev);
1773 void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1774 int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1775 int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle);
1776 int hci_remove_all_adv_monitor(struct hci_dev *hdev);
1777 bool hci_is_adv_monitoring(struct hci_dev *hdev);
1778 int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev);
1779 
1780 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1781 
1782 void hci_init_sysfs(struct hci_dev *hdev);
1783 void hci_conn_init_sysfs(struct hci_conn *conn);
1784 void hci_conn_add_sysfs(struct hci_conn *conn);
1785 void hci_conn_del_sysfs(struct hci_conn *conn);
1786 
1787 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1788 #define GET_HCIDEV_DEV(hdev) ((hdev)->dev.parent)
1789 
1790 /* ----- LMP capabilities ----- */
1791 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1792 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1793 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1794 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1795 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1796 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1797 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1798 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1799 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1800 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1801 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1802 #define lmp_esco_2m_capable(dev)   ((dev)->features[0][5] & LMP_EDR_ESCO_2M)
1803 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1804 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1805 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1806 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1807 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1808 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1809 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1810 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1811 #define lmp_edr_2m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_2M)
1812 #define lmp_edr_3m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_3M)
1813 #define lmp_edr_3slot_capable(dev) ((dev)->features[0][4] & LMP_EDR_3SLOT)
1814 #define lmp_edr_5slot_capable(dev) ((dev)->features[0][5] & LMP_EDR_5SLOT)
1815 
1816 /* ----- Extended LMP capabilities ----- */
1817 #define lmp_cpb_central_capable(dev) ((dev)->features[2][0] & LMP_CPB_CENTRAL)
1818 #define lmp_cpb_peripheral_capable(dev) ((dev)->features[2][0] & LMP_CPB_PERIPHERAL)
1819 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1820 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1821 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1822 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1823 
1824 /* ----- Host capabilities ----- */
1825 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1826 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1827 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1828 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1829 
1830 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1831 				!hci_dev_test_flag(dev, HCI_AUTO_OFF))
1832 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1833 				hci_dev_test_flag(dev, HCI_SC_ENABLED))
1834 #define rpa_valid(dev)         (bacmp(&dev->rpa, BDADDR_ANY) && \
1835 				!hci_dev_test_flag(dev, HCI_RPA_EXPIRED))
1836 #define adv_rpa_valid(adv)     (bacmp(&adv->random_addr, BDADDR_ANY) && \
1837 				!adv->rpa_expired)
1838 
1839 #define scan_1m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_1M) || \
1840 		      ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_1M))
1841 
1842 #define le_2m_capable(dev) (((dev)->le_features[1] & HCI_LE_PHY_2M))
1843 
1844 #define scan_2m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_2M) || \
1845 		      ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_2M))
1846 
1847 #define le_coded_capable(dev) (((dev)->le_features[1] & HCI_LE_PHY_CODED) && \
1848 			       !test_bit(HCI_QUIRK_BROKEN_LE_CODED, \
1849 					 &(dev)->quirks))
1850 
1851 #define scan_coded(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_CODED) || \
1852 			 ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_CODED))
1853 
1854 #define ll_privacy_capable(dev) ((dev)->le_features[0] & HCI_LE_LL_PRIVACY)
1855 
1856 /* Use LL Privacy based address resolution if supported */
1857 #define use_ll_privacy(dev) (ll_privacy_capable(dev) && \
1858 			     hci_dev_test_flag(dev, HCI_ENABLE_LL_PRIVACY))
1859 
1860 #define privacy_mode_capable(dev) (use_ll_privacy(dev) && \
1861 				   (hdev->commands[39] & 0x04))
1862 
1863 #define read_key_size_capable(dev) \
1864 	((dev)->commands[20] & 0x10 && \
1865 	 !test_bit(HCI_QUIRK_BROKEN_READ_ENC_KEY_SIZE, &hdev->quirks))
1866 
1867 /* Use enhanced synchronous connection if command is supported and its quirk
1868  * has not been set.
1869  */
1870 #define enhanced_sync_conn_capable(dev) \
1871 	(((dev)->commands[29] & 0x08) && \
1872 	 !test_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &(dev)->quirks))
1873 
1874 /* Use ext scanning if set ext scan param and ext scan enable is supported */
1875 #define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \
1876 			   ((dev)->commands[37] & 0x40) && \
1877 			   !test_bit(HCI_QUIRK_BROKEN_EXT_SCAN, &(dev)->quirks))
1878 
1879 /* Use ext create connection if command is supported */
1880 #define use_ext_conn(dev) (((dev)->commands[37] & 0x80) && \
1881 	!test_bit(HCI_QUIRK_BROKEN_EXT_CREATE_CONN, &(dev)->quirks))
1882 /* Extended advertising support */
1883 #define ext_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_EXT_ADV))
1884 
1885 /* Maximum advertising length */
1886 #define max_adv_len(dev) \
1887 	(ext_adv_capable(dev) ? HCI_MAX_EXT_AD_LENGTH : HCI_MAX_AD_LENGTH)
1888 
1889 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 1789:
1890  *
1891  * C24: Mandatory if the LE Controller supports Connection State and either
1892  * LE Feature (LL Privacy) or LE Feature (Extended Advertising) is supported
1893  */
1894 #define use_enhanced_conn_complete(dev) ((ll_privacy_capable(dev) || \
1895 					 ext_adv_capable(dev)) && \
1896 					 !test_bit(HCI_QUIRK_BROKEN_EXT_CREATE_CONN, \
1897 						 &(dev)->quirks))
1898 
1899 /* Periodic advertising support */
1900 #define per_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_PERIODIC_ADV))
1901 
1902 /* CIS Master/Slave and BIS support */
1903 #define iso_capable(dev) (cis_capable(dev) || bis_capable(dev))
1904 #define cis_capable(dev) \
1905 	(cis_central_capable(dev) || cis_peripheral_capable(dev))
1906 #define cis_central_capable(dev) \
1907 	((dev)->le_features[3] & HCI_LE_CIS_CENTRAL)
1908 #define cis_peripheral_capable(dev) \
1909 	((dev)->le_features[3] & HCI_LE_CIS_PERIPHERAL)
1910 #define bis_capable(dev) ((dev)->le_features[3] & HCI_LE_ISO_BROADCASTER)
1911 #define sync_recv_capable(dev) ((dev)->le_features[3] & HCI_LE_ISO_SYNC_RECEIVER)
1912 
1913 #define mws_transport_config_capable(dev) (((dev)->commands[30] & 0x08) && \
1914 	(!test_bit(HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG, &(dev)->quirks)))
1915 
1916 /* ----- HCI protocols ----- */
1917 #define HCI_PROTO_DEFER             0x01
1918 
hci_proto_connect_ind(struct hci_dev * hdev,bdaddr_t * bdaddr,__u8 type,__u8 * flags)1919 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1920 					__u8 type, __u8 *flags)
1921 {
1922 	switch (type) {
1923 	case ACL_LINK:
1924 		return l2cap_connect_ind(hdev, bdaddr);
1925 
1926 	case SCO_LINK:
1927 	case ESCO_LINK:
1928 		return sco_connect_ind(hdev, bdaddr, flags);
1929 
1930 	case ISO_LINK:
1931 		return iso_connect_ind(hdev, bdaddr, flags);
1932 
1933 	default:
1934 		BT_ERR("unknown link type %d", type);
1935 		return -EINVAL;
1936 	}
1937 }
1938 
hci_proto_disconn_ind(struct hci_conn * conn)1939 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1940 {
1941 	if (conn->type != ACL_LINK && conn->type != LE_LINK)
1942 		return HCI_ERROR_REMOTE_USER_TERM;
1943 
1944 	return l2cap_disconn_ind(conn);
1945 }
1946 
1947 /* ----- HCI callbacks ----- */
1948 struct hci_cb {
1949 	struct list_head list;
1950 
1951 	char *name;
1952 
1953 	void (*connect_cfm)	(struct hci_conn *conn, __u8 status);
1954 	void (*disconn_cfm)	(struct hci_conn *conn, __u8 status);
1955 	void (*security_cfm)	(struct hci_conn *conn, __u8 status,
1956 								__u8 encrypt);
1957 	void (*key_change_cfm)	(struct hci_conn *conn, __u8 status);
1958 	void (*role_switch_cfm)	(struct hci_conn *conn, __u8 status, __u8 role);
1959 };
1960 
hci_connect_cfm(struct hci_conn * conn,__u8 status)1961 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1962 {
1963 	struct hci_cb *cb;
1964 
1965 	mutex_lock(&hci_cb_list_lock);
1966 	list_for_each_entry(cb, &hci_cb_list, list) {
1967 		if (cb->connect_cfm)
1968 			cb->connect_cfm(conn, status);
1969 	}
1970 	mutex_unlock(&hci_cb_list_lock);
1971 
1972 	if (conn->connect_cfm_cb)
1973 		conn->connect_cfm_cb(conn, status);
1974 }
1975 
hci_disconn_cfm(struct hci_conn * conn,__u8 reason)1976 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1977 {
1978 	struct hci_cb *cb;
1979 
1980 	mutex_lock(&hci_cb_list_lock);
1981 	list_for_each_entry(cb, &hci_cb_list, list) {
1982 		if (cb->disconn_cfm)
1983 			cb->disconn_cfm(conn, reason);
1984 	}
1985 	mutex_unlock(&hci_cb_list_lock);
1986 
1987 	if (conn->disconn_cfm_cb)
1988 		conn->disconn_cfm_cb(conn, reason);
1989 }
1990 
hci_auth_cfm(struct hci_conn * conn,__u8 status)1991 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1992 {
1993 	struct hci_cb *cb;
1994 	__u8 encrypt;
1995 
1996 	if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1997 		return;
1998 
1999 	encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
2000 
2001 	mutex_lock(&hci_cb_list_lock);
2002 	list_for_each_entry(cb, &hci_cb_list, list) {
2003 		if (cb->security_cfm)
2004 			cb->security_cfm(conn, status, encrypt);
2005 	}
2006 	mutex_unlock(&hci_cb_list_lock);
2007 
2008 	if (conn->security_cfm_cb)
2009 		conn->security_cfm_cb(conn, status);
2010 }
2011 
hci_encrypt_cfm(struct hci_conn * conn,__u8 status)2012 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status)
2013 {
2014 	struct hci_cb *cb;
2015 	__u8 encrypt;
2016 
2017 	if (conn->state == BT_CONFIG) {
2018 		if (!status)
2019 			conn->state = BT_CONNECTED;
2020 
2021 		hci_connect_cfm(conn, status);
2022 		hci_conn_drop(conn);
2023 		return;
2024 	}
2025 
2026 	if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
2027 		encrypt = 0x00;
2028 	else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
2029 		encrypt = 0x02;
2030 	else
2031 		encrypt = 0x01;
2032 
2033 	if (!status) {
2034 		if (conn->sec_level == BT_SECURITY_SDP)
2035 			conn->sec_level = BT_SECURITY_LOW;
2036 
2037 		if (conn->pending_sec_level > conn->sec_level)
2038 			conn->sec_level = conn->pending_sec_level;
2039 	}
2040 
2041 	mutex_lock(&hci_cb_list_lock);
2042 	list_for_each_entry(cb, &hci_cb_list, list) {
2043 		if (cb->security_cfm)
2044 			cb->security_cfm(conn, status, encrypt);
2045 	}
2046 	mutex_unlock(&hci_cb_list_lock);
2047 
2048 	if (conn->security_cfm_cb)
2049 		conn->security_cfm_cb(conn, status);
2050 }
2051 
hci_key_change_cfm(struct hci_conn * conn,__u8 status)2052 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
2053 {
2054 	struct hci_cb *cb;
2055 
2056 	mutex_lock(&hci_cb_list_lock);
2057 	list_for_each_entry(cb, &hci_cb_list, list) {
2058 		if (cb->key_change_cfm)
2059 			cb->key_change_cfm(conn, status);
2060 	}
2061 	mutex_unlock(&hci_cb_list_lock);
2062 }
2063 
hci_role_switch_cfm(struct hci_conn * conn,__u8 status,__u8 role)2064 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
2065 								__u8 role)
2066 {
2067 	struct hci_cb *cb;
2068 
2069 	mutex_lock(&hci_cb_list_lock);
2070 	list_for_each_entry(cb, &hci_cb_list, list) {
2071 		if (cb->role_switch_cfm)
2072 			cb->role_switch_cfm(conn, status, role);
2073 	}
2074 	mutex_unlock(&hci_cb_list_lock);
2075 }
2076 
hci_bdaddr_is_rpa(bdaddr_t * bdaddr,u8 addr_type)2077 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
2078 {
2079 	if (addr_type != ADDR_LE_DEV_RANDOM)
2080 		return false;
2081 
2082 	if ((bdaddr->b[5] & 0xc0) == 0x40)
2083 	       return true;
2084 
2085 	return false;
2086 }
2087 
hci_is_identity_address(bdaddr_t * addr,u8 addr_type)2088 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
2089 {
2090 	if (addr_type == ADDR_LE_DEV_PUBLIC)
2091 		return true;
2092 
2093 	/* Check for Random Static address type */
2094 	if ((addr->b[5] & 0xc0) == 0xc0)
2095 		return true;
2096 
2097 	return false;
2098 }
2099 
hci_get_irk(struct hci_dev * hdev,bdaddr_t * bdaddr,u8 addr_type)2100 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
2101 					  bdaddr_t *bdaddr, u8 addr_type)
2102 {
2103 	if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
2104 		return NULL;
2105 
2106 	return hci_find_irk_by_rpa(hdev, bdaddr);
2107 }
2108 
hci_check_conn_params(u16 min,u16 max,u16 latency,u16 to_multiplier)2109 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
2110 					u16 to_multiplier)
2111 {
2112 	u16 max_latency;
2113 
2114 	if (min > max) {
2115 		BT_WARN("min %d > max %d", min, max);
2116 		return -EINVAL;
2117 	}
2118 
2119 	if (min < 6) {
2120 		BT_WARN("min %d < 6", min);
2121 		return -EINVAL;
2122 	}
2123 
2124 	if (max > 3200) {
2125 		BT_WARN("max %d > 3200", max);
2126 		return -EINVAL;
2127 	}
2128 
2129 	if (to_multiplier < 10) {
2130 		BT_WARN("to_multiplier %d < 10", to_multiplier);
2131 		return -EINVAL;
2132 	}
2133 
2134 	if (to_multiplier > 3200) {
2135 		BT_WARN("to_multiplier %d > 3200", to_multiplier);
2136 		return -EINVAL;
2137 	}
2138 
2139 	if (max >= to_multiplier * 8) {
2140 		BT_WARN("max %d >= to_multiplier %d * 8", max, to_multiplier);
2141 		return -EINVAL;
2142 	}
2143 
2144 	max_latency = (to_multiplier * 4 / max) - 1;
2145 	if (latency > 499) {
2146 		BT_WARN("latency %d > 499", latency);
2147 		return -EINVAL;
2148 	}
2149 
2150 	if (latency > max_latency) {
2151 		BT_WARN("latency %d > max_latency %d", latency, max_latency);
2152 		return -EINVAL;
2153 	}
2154 
2155 	return 0;
2156 }
2157 
2158 int hci_register_cb(struct hci_cb *hcb);
2159 int hci_unregister_cb(struct hci_cb *hcb);
2160 
2161 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
2162 		   const void *param);
2163 
2164 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
2165 		 const void *param);
2166 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
2167 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
2168 void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb);
2169 
2170 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
2171 void *hci_recv_event_data(struct hci_dev *hdev, __u8 event);
2172 
2173 u32 hci_conn_get_phy(struct hci_conn *conn);
2174 
2175 /* ----- HCI Sockets ----- */
2176 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
2177 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
2178 			 int flag, struct sock *skip_sk);
2179 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
2180 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
2181 				 void *data, u16 data_len, ktime_t tstamp,
2182 				 int flag, struct sock *skip_sk);
2183 
2184 void hci_sock_dev_event(struct hci_dev *hdev, int event);
2185 
2186 #define HCI_MGMT_VAR_LEN	BIT(0)
2187 #define HCI_MGMT_NO_HDEV	BIT(1)
2188 #define HCI_MGMT_UNTRUSTED	BIT(2)
2189 #define HCI_MGMT_UNCONFIGURED	BIT(3)
2190 #define HCI_MGMT_HDEV_OPTIONAL	BIT(4)
2191 
2192 struct hci_mgmt_handler {
2193 	int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
2194 		     u16 data_len);
2195 	size_t data_len;
2196 	unsigned long flags;
2197 };
2198 
2199 struct hci_mgmt_chan {
2200 	struct list_head list;
2201 	unsigned short channel;
2202 	size_t handler_count;
2203 	const struct hci_mgmt_handler *handlers;
2204 	void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
2205 };
2206 
2207 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
2208 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
2209 
2210 /* Management interface */
2211 #define DISCOV_TYPE_BREDR		(BIT(BDADDR_BREDR))
2212 #define DISCOV_TYPE_LE			(BIT(BDADDR_LE_PUBLIC) | \
2213 					 BIT(BDADDR_LE_RANDOM))
2214 #define DISCOV_TYPE_INTERLEAVED		(BIT(BDADDR_BREDR) | \
2215 					 BIT(BDADDR_LE_PUBLIC) | \
2216 					 BIT(BDADDR_LE_RANDOM))
2217 
2218 /* These LE scan and inquiry parameters were chosen according to LE General
2219  * Discovery Procedure specification.
2220  */
2221 #define DISCOV_LE_SCAN_WIN		0x12
2222 #define DISCOV_LE_SCAN_INT		0x12
2223 #define DISCOV_LE_TIMEOUT		10240	/* msec */
2224 #define DISCOV_INTERLEAVED_TIMEOUT	5120	/* msec */
2225 #define DISCOV_INTERLEAVED_INQUIRY_LEN	0x04
2226 #define DISCOV_BREDR_INQUIRY_LEN	0x08
2227 #define DISCOV_LE_RESTART_DELAY		msecs_to_jiffies(200)	/* msec */
2228 #define DISCOV_LE_FAST_ADV_INT_MIN	0x00A0	/* 100 msec */
2229 #define DISCOV_LE_FAST_ADV_INT_MAX	0x00F0	/* 150 msec */
2230 #define DISCOV_LE_PER_ADV_INT_MIN	0x00A0	/* 200 msec */
2231 #define DISCOV_LE_PER_ADV_INT_MAX	0x00A0	/* 200 msec */
2232 #define DISCOV_LE_ADV_MESH_MIN		0x00A0  /* 100 msec */
2233 #define DISCOV_LE_ADV_MESH_MAX		0x00A0  /* 100 msec */
2234 #define INTERVAL_TO_MS(x)		(((x) * 10) / 0x10)
2235 
2236 #define NAME_RESOLVE_DURATION		msecs_to_jiffies(10240)	/* 10.24 sec */
2237 
2238 void mgmt_fill_version_info(void *ver);
2239 int mgmt_new_settings(struct hci_dev *hdev);
2240 void mgmt_index_added(struct hci_dev *hdev);
2241 void mgmt_index_removed(struct hci_dev *hdev);
2242 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
2243 void mgmt_power_on(struct hci_dev *hdev, int err);
2244 void __mgmt_power_off(struct hci_dev *hdev);
2245 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
2246 		       bool persistent);
2247 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
2248 			   u8 *name, u8 name_len);
2249 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
2250 			      u8 link_type, u8 addr_type, u8 reason,
2251 			      bool mgmt_connected);
2252 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
2253 			    u8 link_type, u8 addr_type, u8 status);
2254 void mgmt_connect_failed(struct hci_dev *hdev, struct hci_conn *conn,
2255 			 u8 status);
2256 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
2257 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2258 				  u8 status);
2259 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2260 				      u8 status);
2261 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2262 			      u8 link_type, u8 addr_type, u32 value,
2263 			      u8 confirm_hint);
2264 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2265 				     u8 link_type, u8 addr_type, u8 status);
2266 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2267 					 u8 link_type, u8 addr_type, u8 status);
2268 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2269 			      u8 link_type, u8 addr_type);
2270 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2271 				     u8 link_type, u8 addr_type, u8 status);
2272 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2273 					 u8 link_type, u8 addr_type, u8 status);
2274 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
2275 			     u8 link_type, u8 addr_type, u32 passkey,
2276 			     u8 entered);
2277 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
2278 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
2279 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
2280 				    u8 status);
2281 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
2282 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
2283 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
2284 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2285 		       u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
2286 		       u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len,
2287 		       u64 instant);
2288 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2289 		      u8 addr_type, s8 rssi, u8 *name, u8 name_len);
2290 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
2291 void mgmt_suspending(struct hci_dev *hdev, u8 state);
2292 void mgmt_resuming(struct hci_dev *hdev, u8 reason, bdaddr_t *bdaddr,
2293 		   u8 addr_type);
2294 bool mgmt_powering_down(struct hci_dev *hdev);
2295 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
2296 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
2297 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
2298 		   bool persistent);
2299 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
2300 			 u8 bdaddr_type, u8 store_hint, u16 min_interval,
2301 			 u16 max_interval, u16 latency, u16 timeout);
2302 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
2303 bool mgmt_get_connectable(struct hci_dev *hdev);
2304 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
2305 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
2306 			    u8 instance);
2307 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
2308 			      u8 instance);
2309 int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip);
2310 void mgmt_adv_monitor_device_lost(struct hci_dev *hdev, u16 handle,
2311 				  bdaddr_t *bdaddr, u8 addr_type);
2312 
2313 int hci_abort_conn(struct hci_conn *conn, u8 reason);
2314 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
2315 		      u16 to_multiplier);
2316 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
2317 		      __u8 ltk[16], __u8 key_size);
2318 
2319 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2320 			       u8 *bdaddr_type);
2321 
2322 #define SCO_AIRMODE_MASK       0x0003
2323 #define SCO_AIRMODE_CVSD       0x0000
2324 #define SCO_AIRMODE_TRANSP     0x0003
2325 
2326 #define LOCAL_CODEC_ACL_MASK	BIT(0)
2327 #define LOCAL_CODEC_SCO_MASK	BIT(1)
2328 
2329 #define TRANSPORT_TYPE_MAX	0x04
2330 
2331 #endif /* __HCI_CORE_H */
2332