1 /*
2    BlueZ - Bluetooth protocol stack for Linux
3    Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
4 
5    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
6 
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License version 2 as
9    published by the Free Software Foundation;
10 
11    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
15    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 
20    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22    SOFTWARE IS DISCLAIMED.
23 */
24 
25 #ifndef __HCI_CORE_H
26 #define __HCI_CORE_H
27 
28 #include <linux/idr.h>
29 #include <linux/leds.h>
30 #include <linux/rculist.h>
31 
32 #include <net/bluetooth/hci.h>
33 #include <net/bluetooth/hci_sync.h>
34 #include <net/bluetooth/hci_sock.h>
35 
36 /* HCI priority */
37 #define HCI_PRIO_MAX	7
38 
39 /* HCI maximum id value */
40 #define HCI_MAX_ID 10000
41 
42 /* HCI Core structures */
43 struct inquiry_data {
44 	bdaddr_t	bdaddr;
45 	__u8		pscan_rep_mode;
46 	__u8		pscan_period_mode;
47 	__u8		pscan_mode;
48 	__u8		dev_class[3];
49 	__le16		clock_offset;
50 	__s8		rssi;
51 	__u8		ssp_mode;
52 };
53 
54 struct inquiry_entry {
55 	struct list_head	all;		/* inq_cache.all */
56 	struct list_head	list;		/* unknown or resolve */
57 	enum {
58 		NAME_NOT_KNOWN,
59 		NAME_NEEDED,
60 		NAME_PENDING,
61 		NAME_KNOWN,
62 	} name_state;
63 	__u32			timestamp;
64 	struct inquiry_data	data;
65 };
66 
67 struct discovery_state {
68 	int			type;
69 	enum {
70 		DISCOVERY_STOPPED,
71 		DISCOVERY_STARTING,
72 		DISCOVERY_FINDING,
73 		DISCOVERY_RESOLVING,
74 		DISCOVERY_STOPPING,
75 	} state;
76 	struct list_head	all;	/* All devices found during inquiry */
77 	struct list_head	unknown;	/* Name state not known */
78 	struct list_head	resolve;	/* Name needs to be resolved */
79 	__u32			timestamp;
80 	bdaddr_t		last_adv_addr;
81 	u8			last_adv_addr_type;
82 	s8			last_adv_rssi;
83 	u32			last_adv_flags;
84 	u8			last_adv_data[HCI_MAX_AD_LENGTH];
85 	u8			last_adv_data_len;
86 	bool			report_invalid_rssi;
87 	bool			result_filtering;
88 	bool			limited;
89 	s8			rssi;
90 	u16			uuid_count;
91 	u8			(*uuids)[16];
92 	unsigned long		scan_start;
93 	unsigned long		scan_duration;
94 	unsigned long		name_resolve_timeout;
95 };
96 
97 #define SUSPEND_NOTIFIER_TIMEOUT	msecs_to_jiffies(2000) /* 2 seconds */
98 
99 enum suspend_tasks {
100 	SUSPEND_PAUSE_DISCOVERY,
101 	SUSPEND_UNPAUSE_DISCOVERY,
102 
103 	SUSPEND_PAUSE_ADVERTISING,
104 	SUSPEND_UNPAUSE_ADVERTISING,
105 
106 	SUSPEND_SCAN_DISABLE,
107 	SUSPEND_SCAN_ENABLE,
108 	SUSPEND_DISCONNECTING,
109 
110 	SUSPEND_POWERING_DOWN,
111 
112 	SUSPEND_PREPARE_NOTIFIER,
113 
114 	SUSPEND_SET_ADV_FILTER,
115 	__SUSPEND_NUM_TASKS
116 };
117 
118 enum suspended_state {
119 	BT_RUNNING = 0,
120 	BT_SUSPEND_DISCONNECT,
121 	BT_SUSPEND_CONFIGURE_WAKE,
122 };
123 
124 struct hci_conn_hash {
125 	struct list_head list;
126 	unsigned int     acl_num;
127 	unsigned int     amp_num;
128 	unsigned int     sco_num;
129 	unsigned int     iso_num;
130 	unsigned int     le_num;
131 	unsigned int     le_num_peripheral;
132 };
133 
134 struct bdaddr_list {
135 	struct list_head list;
136 	bdaddr_t bdaddr;
137 	u8 bdaddr_type;
138 };
139 
140 struct codec_list {
141 	struct list_head list;
142 	u8	id;
143 	__u16	cid;
144 	__u16	vid;
145 	u8	transport;
146 	u8	num_caps;
147 	u32	len;
148 	struct hci_codec_caps caps[];
149 };
150 
151 struct bdaddr_list_with_irk {
152 	struct list_head list;
153 	bdaddr_t bdaddr;
154 	u8 bdaddr_type;
155 	u8 peer_irk[16];
156 	u8 local_irk[16];
157 };
158 
159 /* Bitmask of connection flags */
160 enum hci_conn_flags {
161 	HCI_CONN_FLAG_REMOTE_WAKEUP = 1,
162 	HCI_CONN_FLAG_DEVICE_PRIVACY = 2,
163 };
164 typedef u8 hci_conn_flags_t;
165 
166 struct bdaddr_list_with_flags {
167 	struct list_head list;
168 	bdaddr_t bdaddr;
169 	u8 bdaddr_type;
170 	hci_conn_flags_t flags;
171 };
172 
173 struct bt_uuid {
174 	struct list_head list;
175 	u8 uuid[16];
176 	u8 size;
177 	u8 svc_hint;
178 };
179 
180 struct blocked_key {
181 	struct list_head list;
182 	struct rcu_head rcu;
183 	u8 type;
184 	u8 val[16];
185 };
186 
187 struct smp_csrk {
188 	bdaddr_t bdaddr;
189 	u8 bdaddr_type;
190 	u8 type;
191 	u8 val[16];
192 };
193 
194 struct smp_ltk {
195 	struct list_head list;
196 	struct rcu_head rcu;
197 	bdaddr_t bdaddr;
198 	u8 bdaddr_type;
199 	u8 authenticated;
200 	u8 type;
201 	u8 enc_size;
202 	__le16 ediv;
203 	__le64 rand;
204 	u8 val[16];
205 };
206 
207 struct smp_irk {
208 	struct list_head list;
209 	struct rcu_head rcu;
210 	bdaddr_t rpa;
211 	bdaddr_t bdaddr;
212 	u8 addr_type;
213 	u8 val[16];
214 };
215 
216 struct link_key {
217 	struct list_head list;
218 	struct rcu_head rcu;
219 	bdaddr_t bdaddr;
220 	u8 type;
221 	u8 val[HCI_LINK_KEY_SIZE];
222 	u8 pin_len;
223 };
224 
225 struct oob_data {
226 	struct list_head list;
227 	bdaddr_t bdaddr;
228 	u8 bdaddr_type;
229 	u8 present;
230 	u8 hash192[16];
231 	u8 rand192[16];
232 	u8 hash256[16];
233 	u8 rand256[16];
234 };
235 
236 struct adv_info {
237 	struct list_head list;
238 	bool	enabled;
239 	bool	pending;
240 	bool	periodic;
241 	__u8	mesh;
242 	__u8	instance;
243 	__u32	flags;
244 	__u16	timeout;
245 	__u16	remaining_time;
246 	__u16	duration;
247 	__u16	adv_data_len;
248 	__u8	adv_data[HCI_MAX_EXT_AD_LENGTH];
249 	bool	adv_data_changed;
250 	__u16	scan_rsp_len;
251 	__u8	scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
252 	bool	scan_rsp_changed;
253 	__u16	per_adv_data_len;
254 	__u8	per_adv_data[HCI_MAX_PER_AD_LENGTH];
255 	__s8	tx_power;
256 	__u32   min_interval;
257 	__u32   max_interval;
258 	bdaddr_t	random_addr;
259 	bool 		rpa_expired;
260 	struct delayed_work	rpa_expired_cb;
261 };
262 
263 #define HCI_MAX_ADV_INSTANCES		5
264 #define HCI_DEFAULT_ADV_DURATION	2
265 
266 #define HCI_ADV_TX_POWER_NO_PREFERENCE 0x7F
267 
268 #define DATA_CMP(_d1, _l1, _d2, _l2) \
269 	(_l1 == _l2 ? memcmp(_d1, _d2, _l1) : _l1 - _l2)
270 
271 #define ADV_DATA_CMP(_adv, _data, _len) \
272 	DATA_CMP((_adv)->adv_data, (_adv)->adv_data_len, _data, _len)
273 
274 #define SCAN_RSP_CMP(_adv, _data, _len) \
275 	DATA_CMP((_adv)->scan_rsp_data, (_adv)->scan_rsp_len, _data, _len)
276 
277 struct monitored_device {
278 	struct list_head list;
279 
280 	bdaddr_t bdaddr;
281 	__u8     addr_type;
282 	__u16    handle;
283 	bool     notified;
284 };
285 
286 struct adv_pattern {
287 	struct list_head list;
288 	__u8 ad_type;
289 	__u8 offset;
290 	__u8 length;
291 	__u8 value[HCI_MAX_AD_LENGTH];
292 };
293 
294 struct adv_rssi_thresholds {
295 	__s8 low_threshold;
296 	__s8 high_threshold;
297 	__u16 low_threshold_timeout;
298 	__u16 high_threshold_timeout;
299 	__u8 sampling_period;
300 };
301 
302 struct adv_monitor {
303 	struct list_head patterns;
304 	struct adv_rssi_thresholds rssi;
305 	__u16		handle;
306 
307 	enum {
308 		ADV_MONITOR_STATE_NOT_REGISTERED,
309 		ADV_MONITOR_STATE_REGISTERED,
310 		ADV_MONITOR_STATE_OFFLOADED
311 	} state;
312 };
313 
314 #define HCI_MIN_ADV_MONITOR_HANDLE		1
315 #define HCI_MAX_ADV_MONITOR_NUM_HANDLES		32
316 #define HCI_MAX_ADV_MONITOR_NUM_PATTERNS	16
317 #define HCI_ADV_MONITOR_EXT_NONE		1
318 #define HCI_ADV_MONITOR_EXT_MSFT		2
319 
320 #define HCI_MAX_SHORT_NAME_LENGTH	10
321 
322 #define HCI_CONN_HANDLE_UNSET		0xffff
323 #define HCI_CONN_HANDLE_MAX		0x0eff
324 
325 /* Min encryption key size to match with SMP */
326 #define HCI_MIN_ENC_KEY_SIZE		7
327 
328 /* Default LE RPA expiry time, 15 minutes */
329 #define HCI_DEFAULT_RPA_TIMEOUT		(15 * 60)
330 
331 /* Default min/max age of connection information (1s/3s) */
332 #define DEFAULT_CONN_INFO_MIN_AGE	1000
333 #define DEFAULT_CONN_INFO_MAX_AGE	3000
334 /* Default authenticated payload timeout 30s */
335 #define DEFAULT_AUTH_PAYLOAD_TIMEOUT   0x0bb8
336 
337 struct amp_assoc {
338 	__u16	len;
339 	__u16	offset;
340 	__u16	rem_len;
341 	__u16	len_so_far;
342 	__u8	data[HCI_MAX_AMP_ASSOC_SIZE];
343 };
344 
345 #define HCI_MAX_PAGES	3
346 
347 struct hci_dev {
348 	struct list_head list;
349 	struct mutex	lock;
350 
351 	char		name[8];
352 	unsigned long	flags;
353 	__u16		id;
354 	__u8		bus;
355 	__u8		dev_type;
356 	bdaddr_t	bdaddr;
357 	bdaddr_t	setup_addr;
358 	bdaddr_t	public_addr;
359 	bdaddr_t	random_addr;
360 	bdaddr_t	static_addr;
361 	__u8		adv_addr_type;
362 	__u8		dev_name[HCI_MAX_NAME_LENGTH];
363 	__u8		short_name[HCI_MAX_SHORT_NAME_LENGTH];
364 	__u8		eir[HCI_MAX_EIR_LENGTH];
365 	__u16		appearance;
366 	__u8		dev_class[3];
367 	__u8		major_class;
368 	__u8		minor_class;
369 	__u8		max_page;
370 	__u8		features[HCI_MAX_PAGES][8];
371 	__u8		le_features[8];
372 	__u8		le_accept_list_size;
373 	__u8		le_resolv_list_size;
374 	__u8		le_num_of_adv_sets;
375 	__u8		le_states[8];
376 	__u8		mesh_ad_types[16];
377 	__u8		mesh_send_ref;
378 	__u8		commands[64];
379 	__u8		hci_ver;
380 	__u16		hci_rev;
381 	__u8		lmp_ver;
382 	__u16		manufacturer;
383 	__u16		lmp_subver;
384 	__u16		voice_setting;
385 	__u8		num_iac;
386 	__u16		stored_max_keys;
387 	__u16		stored_num_keys;
388 	__u8		io_capability;
389 	__s8		inq_tx_power;
390 	__u8		err_data_reporting;
391 	__u16		page_scan_interval;
392 	__u16		page_scan_window;
393 	__u8		page_scan_type;
394 	__u8		le_adv_channel_map;
395 	__u16		le_adv_min_interval;
396 	__u16		le_adv_max_interval;
397 	__u8		le_scan_type;
398 	__u16		le_scan_interval;
399 	__u16		le_scan_window;
400 	__u16		le_scan_int_suspend;
401 	__u16		le_scan_window_suspend;
402 	__u16		le_scan_int_discovery;
403 	__u16		le_scan_window_discovery;
404 	__u16		le_scan_int_adv_monitor;
405 	__u16		le_scan_window_adv_monitor;
406 	__u16		le_scan_int_connect;
407 	__u16		le_scan_window_connect;
408 	__u16		le_conn_min_interval;
409 	__u16		le_conn_max_interval;
410 	__u16		le_conn_latency;
411 	__u16		le_supv_timeout;
412 	__u16		le_def_tx_len;
413 	__u16		le_def_tx_time;
414 	__u16		le_max_tx_len;
415 	__u16		le_max_tx_time;
416 	__u16		le_max_rx_len;
417 	__u16		le_max_rx_time;
418 	__u8		le_max_key_size;
419 	__u8		le_min_key_size;
420 	__u16		discov_interleaved_timeout;
421 	__u16		conn_info_min_age;
422 	__u16		conn_info_max_age;
423 	__u16		auth_payload_timeout;
424 	__u8		min_enc_key_size;
425 	__u8		max_enc_key_size;
426 	__u8		pairing_opts;
427 	__u8		ssp_debug_mode;
428 	__u8		hw_error_code;
429 	__u32		clock;
430 	__u16		advmon_allowlist_duration;
431 	__u16		advmon_no_filter_duration;
432 	__u8		enable_advmon_interleave_scan;
433 
434 	__u16		devid_source;
435 	__u16		devid_vendor;
436 	__u16		devid_product;
437 	__u16		devid_version;
438 
439 	__u8		def_page_scan_type;
440 	__u16		def_page_scan_int;
441 	__u16		def_page_scan_window;
442 	__u8		def_inq_scan_type;
443 	__u16		def_inq_scan_int;
444 	__u16		def_inq_scan_window;
445 	__u16		def_br_lsto;
446 	__u16		def_page_timeout;
447 	__u16		def_multi_adv_rotation_duration;
448 	__u16		def_le_autoconnect_timeout;
449 	__s8		min_le_tx_power;
450 	__s8		max_le_tx_power;
451 
452 	__u16		pkt_type;
453 	__u16		esco_type;
454 	__u16		link_policy;
455 	__u16		link_mode;
456 
457 	__u32		idle_timeout;
458 	__u16		sniff_min_interval;
459 	__u16		sniff_max_interval;
460 
461 	__u8		amp_status;
462 	__u32		amp_total_bw;
463 	__u32		amp_max_bw;
464 	__u32		amp_min_latency;
465 	__u32		amp_max_pdu;
466 	__u8		amp_type;
467 	__u16		amp_pal_cap;
468 	__u16		amp_assoc_size;
469 	__u32		amp_max_flush_to;
470 	__u32		amp_be_flush_to;
471 
472 	struct amp_assoc	loc_assoc;
473 
474 	__u8		flow_ctl_mode;
475 
476 	unsigned int	auto_accept_delay;
477 
478 	unsigned long	quirks;
479 
480 	atomic_t	cmd_cnt;
481 	unsigned int	acl_cnt;
482 	unsigned int	sco_cnt;
483 	unsigned int	le_cnt;
484 	unsigned int	iso_cnt;
485 
486 	unsigned int	acl_mtu;
487 	unsigned int	sco_mtu;
488 	unsigned int	le_mtu;
489 	unsigned int	iso_mtu;
490 	unsigned int	acl_pkts;
491 	unsigned int	sco_pkts;
492 	unsigned int	le_pkts;
493 	unsigned int	iso_pkts;
494 
495 	__u16		block_len;
496 	__u16		block_mtu;
497 	__u16		num_blocks;
498 	__u16		block_cnt;
499 
500 	unsigned long	acl_last_tx;
501 	unsigned long	sco_last_tx;
502 	unsigned long	le_last_tx;
503 
504 	__u8		le_tx_def_phys;
505 	__u8		le_rx_def_phys;
506 
507 	struct workqueue_struct	*workqueue;
508 	struct workqueue_struct	*req_workqueue;
509 
510 	struct work_struct	power_on;
511 	struct delayed_work	power_off;
512 	struct work_struct	error_reset;
513 	struct work_struct	cmd_sync_work;
514 	struct list_head	cmd_sync_work_list;
515 	struct mutex		cmd_sync_work_lock;
516 	struct work_struct	cmd_sync_cancel_work;
517 	struct work_struct	reenable_adv_work;
518 
519 	__u16			discov_timeout;
520 	struct delayed_work	discov_off;
521 
522 	struct delayed_work	service_cache;
523 
524 	struct delayed_work	cmd_timer;
525 	struct delayed_work	ncmd_timer;
526 
527 	struct work_struct	rx_work;
528 	struct work_struct	cmd_work;
529 	struct work_struct	tx_work;
530 
531 	struct delayed_work	le_scan_disable;
532 	struct delayed_work	le_scan_restart;
533 
534 	struct sk_buff_head	rx_q;
535 	struct sk_buff_head	raw_q;
536 	struct sk_buff_head	cmd_q;
537 
538 	struct sk_buff		*sent_cmd;
539 	struct sk_buff		*recv_event;
540 
541 	struct mutex		req_lock;
542 	wait_queue_head_t	req_wait_q;
543 	__u32			req_status;
544 	__u32			req_result;
545 	struct sk_buff		*req_skb;
546 
547 	void			*smp_data;
548 	void			*smp_bredr_data;
549 
550 	struct discovery_state	discovery;
551 
552 	int			discovery_old_state;
553 	bool			discovery_paused;
554 	int			advertising_old_state;
555 	bool			advertising_paused;
556 
557 	struct notifier_block	suspend_notifier;
558 	enum suspended_state	suspend_state_next;
559 	enum suspended_state	suspend_state;
560 	bool			scanning_paused;
561 	bool			suspended;
562 	u8			wake_reason;
563 	bdaddr_t		wake_addr;
564 	u8			wake_addr_type;
565 
566 	struct hci_conn_hash	conn_hash;
567 
568 	struct list_head	mesh_pending;
569 	struct list_head	mgmt_pending;
570 	struct list_head	reject_list;
571 	struct list_head	accept_list;
572 	struct list_head	uuids;
573 	struct list_head	link_keys;
574 	struct list_head	long_term_keys;
575 	struct list_head	identity_resolving_keys;
576 	struct list_head	remote_oob_data;
577 	struct list_head	le_accept_list;
578 	struct list_head	le_resolv_list;
579 	struct list_head	le_conn_params;
580 	struct list_head	pend_le_conns;
581 	struct list_head	pend_le_reports;
582 	struct list_head	blocked_keys;
583 	struct list_head	local_codecs;
584 
585 	struct hci_dev_stats	stat;
586 
587 	atomic_t		promisc;
588 
589 	const char		*hw_info;
590 	const char		*fw_info;
591 	struct dentry		*debugfs;
592 
593 	struct device		dev;
594 
595 	struct rfkill		*rfkill;
596 
597 	DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
598 	hci_conn_flags_t	conn_flags;
599 
600 	__s8			adv_tx_power;
601 	__u8			adv_data[HCI_MAX_EXT_AD_LENGTH];
602 	__u8			adv_data_len;
603 	__u8			scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
604 	__u8			scan_rsp_data_len;
605 	__u8			per_adv_data[HCI_MAX_PER_AD_LENGTH];
606 	__u8			per_adv_data_len;
607 
608 	struct list_head	adv_instances;
609 	unsigned int		adv_instance_cnt;
610 	__u8			cur_adv_instance;
611 	__u16			adv_instance_timeout;
612 	struct delayed_work	adv_instance_expire;
613 
614 	struct idr		adv_monitors_idr;
615 	unsigned int		adv_monitors_cnt;
616 
617 	__u8			irk[16];
618 	__u32			rpa_timeout;
619 	struct delayed_work	rpa_expired;
620 	bdaddr_t		rpa;
621 
622 	struct delayed_work	mesh_send_done;
623 
624 	enum {
625 		INTERLEAVE_SCAN_NONE,
626 		INTERLEAVE_SCAN_NO_FILTER,
627 		INTERLEAVE_SCAN_ALLOWLIST
628 	} interleave_scan_state;
629 
630 	struct delayed_work	interleave_scan;
631 
632 	struct list_head	monitored_devices;
633 	bool			advmon_pend_notify;
634 
635 #if IS_ENABLED(CONFIG_BT_LEDS)
636 	struct led_trigger	*power_led;
637 #endif
638 
639 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
640 	__u16			msft_opcode;
641 	void			*msft_data;
642 	bool			msft_curve_validity;
643 #endif
644 
645 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
646 	bool			aosp_capable;
647 	bool			aosp_quality_report;
648 #endif
649 
650 	int (*open)(struct hci_dev *hdev);
651 	int (*close)(struct hci_dev *hdev);
652 	int (*flush)(struct hci_dev *hdev);
653 	int (*setup)(struct hci_dev *hdev);
654 	int (*shutdown)(struct hci_dev *hdev);
655 	int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
656 	void (*notify)(struct hci_dev *hdev, unsigned int evt);
657 	void (*hw_error)(struct hci_dev *hdev, u8 code);
658 	int (*post_init)(struct hci_dev *hdev);
659 	int (*set_diag)(struct hci_dev *hdev, bool enable);
660 	int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
661 	void (*cmd_timeout)(struct hci_dev *hdev);
662 	bool (*wakeup)(struct hci_dev *hdev);
663 	int (*set_quality_report)(struct hci_dev *hdev, bool enable);
664 	int (*get_data_path_id)(struct hci_dev *hdev, __u8 *data_path);
665 	int (*get_codec_config_data)(struct hci_dev *hdev, __u8 type,
666 				     struct bt_codec *codec, __u8 *vnd_len,
667 				     __u8 **vnd_data);
668 };
669 
670 #define HCI_PHY_HANDLE(handle)	(handle & 0xff)
671 
672 enum conn_reasons {
673 	CONN_REASON_PAIR_DEVICE,
674 	CONN_REASON_L2CAP_CHAN,
675 	CONN_REASON_SCO_CONNECT,
676 	CONN_REASON_ISO_CONNECT,
677 };
678 
679 struct hci_conn {
680 	struct list_head list;
681 
682 	atomic_t	refcnt;
683 
684 	bdaddr_t	dst;
685 	__u8		dst_type;
686 	bdaddr_t	src;
687 	__u8		src_type;
688 	bdaddr_t	init_addr;
689 	__u8		init_addr_type;
690 	bdaddr_t	resp_addr;
691 	__u8		resp_addr_type;
692 	__u8		adv_instance;
693 	__u16		handle;
694 	__u16		sync_handle;
695 	__u16		state;
696 	__u8		mode;
697 	__u8		type;
698 	__u8		role;
699 	bool		out;
700 	__u8		attempt;
701 	__u8		dev_class[3];
702 	__u8		features[HCI_MAX_PAGES][8];
703 	__u16		pkt_type;
704 	__u16		link_policy;
705 	__u8		key_type;
706 	__u8		auth_type;
707 	__u8		sec_level;
708 	__u8		pending_sec_level;
709 	__u8		pin_length;
710 	__u8		enc_key_size;
711 	__u8		io_capability;
712 	__u32		passkey_notify;
713 	__u8		passkey_entered;
714 	__u16		disc_timeout;
715 	__u16		conn_timeout;
716 	__u16		setting;
717 	__u16		auth_payload_timeout;
718 	__u16		le_conn_min_interval;
719 	__u16		le_conn_max_interval;
720 	__u16		le_conn_interval;
721 	__u16		le_conn_latency;
722 	__u16		le_supv_timeout;
723 	__u8		le_adv_data[HCI_MAX_AD_LENGTH];
724 	__u8		le_adv_data_len;
725 	__u8		le_per_adv_data[HCI_MAX_PER_AD_LENGTH];
726 	__u8		le_per_adv_data_len;
727 	__u8		le_tx_phy;
728 	__u8		le_rx_phy;
729 	__s8		rssi;
730 	__s8		tx_power;
731 	__s8		max_tx_power;
732 	struct bt_iso_qos iso_qos;
733 	unsigned long	flags;
734 
735 	enum conn_reasons conn_reason;
736 
737 	__u32		clock;
738 	__u16		clock_accuracy;
739 
740 	unsigned long	conn_info_timestamp;
741 
742 	__u8		remote_cap;
743 	__u8		remote_auth;
744 	__u8		remote_id;
745 
746 	unsigned int	sent;
747 
748 	struct sk_buff_head data_q;
749 	struct list_head chan_list;
750 
751 	struct delayed_work disc_work;
752 	struct delayed_work auto_accept_work;
753 	struct delayed_work idle_work;
754 	struct delayed_work le_conn_timeout;
755 	struct work_struct  le_scan_cleanup;
756 
757 	struct device	dev;
758 	struct dentry	*debugfs;
759 
760 	struct hci_dev	*hdev;
761 	void		*l2cap_data;
762 	void		*sco_data;
763 	void		*iso_data;
764 	struct amp_mgr	*amp_mgr;
765 
766 	struct hci_conn	*link;
767 	struct bt_codec codec;
768 
769 	void (*connect_cfm_cb)	(struct hci_conn *conn, u8 status);
770 	void (*security_cfm_cb)	(struct hci_conn *conn, u8 status);
771 	void (*disconn_cfm_cb)	(struct hci_conn *conn, u8 reason);
772 
773 	void (*cleanup)(struct hci_conn *conn);
774 };
775 
776 struct hci_chan {
777 	struct list_head list;
778 	__u16 handle;
779 	struct hci_conn *conn;
780 	struct sk_buff_head data_q;
781 	unsigned int	sent;
782 	__u8		state;
783 	bool		amp;
784 };
785 
786 struct hci_conn_params {
787 	struct list_head list;
788 	struct list_head action;
789 
790 	bdaddr_t addr;
791 	u8 addr_type;
792 
793 	u16 conn_min_interval;
794 	u16 conn_max_interval;
795 	u16 conn_latency;
796 	u16 supervision_timeout;
797 
798 	enum {
799 		HCI_AUTO_CONN_DISABLED,
800 		HCI_AUTO_CONN_REPORT,
801 		HCI_AUTO_CONN_DIRECT,
802 		HCI_AUTO_CONN_ALWAYS,
803 		HCI_AUTO_CONN_LINK_LOSS,
804 		HCI_AUTO_CONN_EXPLICIT,
805 	} auto_connect;
806 
807 	struct hci_conn *conn;
808 	bool explicit_connect;
809 	hci_conn_flags_t flags;
810 	u8  privacy_mode;
811 };
812 
813 extern struct list_head hci_dev_list;
814 extern struct list_head hci_cb_list;
815 extern rwlock_t hci_dev_list_lock;
816 extern struct mutex hci_cb_list_lock;
817 
818 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
819 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
820 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
821 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
822 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
823 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
824 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
825 
826 #define hci_dev_clear_volatile_flags(hdev)			\
827 	do {							\
828 		hci_dev_clear_flag(hdev, HCI_LE_SCAN);		\
829 		hci_dev_clear_flag(hdev, HCI_LE_ADV);		\
830 		hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);\
831 		hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);	\
832 		hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);	\
833 	} while (0)
834 
835 #define hci_dev_le_state_simultaneous(hdev) \
836 	(test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) && \
837 	 (hdev->le_states[4] & 0x08) &&	/* Central */ \
838 	 (hdev->le_states[4] & 0x40) &&	/* Peripheral */ \
839 	 (hdev->le_states[3] & 0x10))	/* Simultaneous */
840 
841 /* ----- HCI interface to upper protocols ----- */
842 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
843 int l2cap_disconn_ind(struct hci_conn *hcon);
844 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
845 
846 #if IS_ENABLED(CONFIG_BT_BREDR)
847 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
848 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
849 #else
sco_connect_ind(struct hci_dev * hdev,bdaddr_t * bdaddr,__u8 * flags)850 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
851 				  __u8 *flags)
852 {
853 	return 0;
854 }
855 
sco_recv_scodata(struct hci_conn * hcon,struct sk_buff * skb)856 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
857 {
858 }
859 #endif
860 
861 #if IS_ENABLED(CONFIG_BT_LE)
862 int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
863 void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
864 #else
iso_connect_ind(struct hci_dev * hdev,bdaddr_t * bdaddr,__u8 * flags)865 static inline int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
866 				  __u8 *flags)
867 {
868 	return 0;
869 }
iso_recv(struct hci_conn * hcon,struct sk_buff * skb,u16 flags)870 static inline void iso_recv(struct hci_conn *hcon, struct sk_buff *skb,
871 			    u16 flags)
872 {
873 }
874 #endif
875 
876 /* ----- Inquiry cache ----- */
877 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
878 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
879 
discovery_init(struct hci_dev * hdev)880 static inline void discovery_init(struct hci_dev *hdev)
881 {
882 	hdev->discovery.state = DISCOVERY_STOPPED;
883 	INIT_LIST_HEAD(&hdev->discovery.all);
884 	INIT_LIST_HEAD(&hdev->discovery.unknown);
885 	INIT_LIST_HEAD(&hdev->discovery.resolve);
886 	hdev->discovery.report_invalid_rssi = true;
887 	hdev->discovery.rssi = HCI_RSSI_INVALID;
888 }
889 
hci_discovery_filter_clear(struct hci_dev * hdev)890 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
891 {
892 	hdev->discovery.result_filtering = false;
893 	hdev->discovery.report_invalid_rssi = true;
894 	hdev->discovery.rssi = HCI_RSSI_INVALID;
895 	hdev->discovery.uuid_count = 0;
896 	kfree(hdev->discovery.uuids);
897 	hdev->discovery.uuids = NULL;
898 	hdev->discovery.scan_start = 0;
899 	hdev->discovery.scan_duration = 0;
900 }
901 
902 bool hci_discovery_active(struct hci_dev *hdev);
903 
904 void hci_discovery_set_state(struct hci_dev *hdev, int state);
905 
inquiry_cache_empty(struct hci_dev * hdev)906 static inline int inquiry_cache_empty(struct hci_dev *hdev)
907 {
908 	return list_empty(&hdev->discovery.all);
909 }
910 
inquiry_cache_age(struct hci_dev * hdev)911 static inline long inquiry_cache_age(struct hci_dev *hdev)
912 {
913 	struct discovery_state *c = &hdev->discovery;
914 	return jiffies - c->timestamp;
915 }
916 
inquiry_entry_age(struct inquiry_entry * e)917 static inline long inquiry_entry_age(struct inquiry_entry *e)
918 {
919 	return jiffies - e->timestamp;
920 }
921 
922 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
923 					       bdaddr_t *bdaddr);
924 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
925 						       bdaddr_t *bdaddr);
926 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
927 						       bdaddr_t *bdaddr,
928 						       int state);
929 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
930 				      struct inquiry_entry *ie);
931 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
932 			     bool name_known);
933 void hci_inquiry_cache_flush(struct hci_dev *hdev);
934 
935 /* ----- HCI Connections ----- */
936 enum {
937 	HCI_CONN_AUTH_PEND,
938 	HCI_CONN_REAUTH_PEND,
939 	HCI_CONN_ENCRYPT_PEND,
940 	HCI_CONN_RSWITCH_PEND,
941 	HCI_CONN_MODE_CHANGE_PEND,
942 	HCI_CONN_SCO_SETUP_PEND,
943 	HCI_CONN_MGMT_CONNECTED,
944 	HCI_CONN_SSP_ENABLED,
945 	HCI_CONN_SC_ENABLED,
946 	HCI_CONN_AES_CCM,
947 	HCI_CONN_POWER_SAVE,
948 	HCI_CONN_FLUSH_KEY,
949 	HCI_CONN_ENCRYPT,
950 	HCI_CONN_AUTH,
951 	HCI_CONN_SECURE,
952 	HCI_CONN_FIPS,
953 	HCI_CONN_STK_ENCRYPT,
954 	HCI_CONN_AUTH_INITIATOR,
955 	HCI_CONN_DROP,
956 	HCI_CONN_PARAM_REMOVAL_PEND,
957 	HCI_CONN_NEW_LINK_KEY,
958 	HCI_CONN_SCANNING,
959 	HCI_CONN_AUTH_FAILURE,
960 	HCI_CONN_PER_ADV,
961 };
962 
hci_conn_ssp_enabled(struct hci_conn * conn)963 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
964 {
965 	struct hci_dev *hdev = conn->hdev;
966 	return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
967 	       test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
968 }
969 
hci_conn_sc_enabled(struct hci_conn * conn)970 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
971 {
972 	struct hci_dev *hdev = conn->hdev;
973 	return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
974 	       test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
975 }
976 
hci_conn_hash_add(struct hci_dev * hdev,struct hci_conn * c)977 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
978 {
979 	struct hci_conn_hash *h = &hdev->conn_hash;
980 	list_add_rcu(&c->list, &h->list);
981 	switch (c->type) {
982 	case ACL_LINK:
983 		h->acl_num++;
984 		break;
985 	case AMP_LINK:
986 		h->amp_num++;
987 		break;
988 	case LE_LINK:
989 		h->le_num++;
990 		if (c->role == HCI_ROLE_SLAVE)
991 			h->le_num_peripheral++;
992 		break;
993 	case SCO_LINK:
994 	case ESCO_LINK:
995 		h->sco_num++;
996 		break;
997 	case ISO_LINK:
998 		h->iso_num++;
999 		break;
1000 	}
1001 }
1002 
hci_conn_hash_del(struct hci_dev * hdev,struct hci_conn * c)1003 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
1004 {
1005 	struct hci_conn_hash *h = &hdev->conn_hash;
1006 
1007 	list_del_rcu(&c->list);
1008 	synchronize_rcu();
1009 
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 
hci_conn_num(struct hci_dev * hdev,__u8 type)1032 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
1033 {
1034 	struct hci_conn_hash *h = &hdev->conn_hash;
1035 	switch (type) {
1036 	case ACL_LINK:
1037 		return h->acl_num;
1038 	case AMP_LINK:
1039 		return h->amp_num;
1040 	case LE_LINK:
1041 		return h->le_num;
1042 	case SCO_LINK:
1043 	case ESCO_LINK:
1044 		return h->sco_num;
1045 	case ISO_LINK:
1046 		return h->iso_num;
1047 	default:
1048 		return 0;
1049 	}
1050 }
1051 
hci_conn_count(struct hci_dev * hdev)1052 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
1053 {
1054 	struct hci_conn_hash *c = &hdev->conn_hash;
1055 
1056 	return c->acl_num + c->amp_num + c->sco_num + c->le_num + c->iso_num;
1057 }
1058 
hci_conn_lookup_type(struct hci_dev * hdev,__u16 handle)1059 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
1060 {
1061 	struct hci_conn_hash *h = &hdev->conn_hash;
1062 	struct hci_conn *c;
1063 	__u8 type = INVALID_LINK;
1064 
1065 	rcu_read_lock();
1066 
1067 	list_for_each_entry_rcu(c, &h->list, list) {
1068 		if (c->handle == handle) {
1069 			type = c->type;
1070 			break;
1071 		}
1072 	}
1073 
1074 	rcu_read_unlock();
1075 
1076 	return type;
1077 }
1078 
hci_conn_hash_lookup_bis(struct hci_dev * hdev,bdaddr_t * ba,__u8 big,__u8 bis)1079 static inline struct hci_conn *hci_conn_hash_lookup_bis(struct hci_dev *hdev,
1080 							bdaddr_t *ba,
1081 							__u8 big, __u8 bis)
1082 {
1083 	struct hci_conn_hash *h = &hdev->conn_hash;
1084 	struct hci_conn  *c;
1085 
1086 	rcu_read_lock();
1087 
1088 	list_for_each_entry_rcu(c, &h->list, list) {
1089 		if (bacmp(&c->dst, ba) || c->type != ISO_LINK)
1090 			continue;
1091 
1092 		if (c->iso_qos.big == big && c->iso_qos.bis == bis) {
1093 			rcu_read_unlock();
1094 			return c;
1095 		}
1096 	}
1097 	rcu_read_unlock();
1098 
1099 	return NULL;
1100 }
1101 
hci_conn_hash_lookup_handle(struct hci_dev * hdev,__u16 handle)1102 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
1103 								__u16 handle)
1104 {
1105 	struct hci_conn_hash *h = &hdev->conn_hash;
1106 	struct hci_conn  *c;
1107 
1108 	rcu_read_lock();
1109 
1110 	list_for_each_entry_rcu(c, &h->list, list) {
1111 		if (c->handle == handle) {
1112 			rcu_read_unlock();
1113 			return c;
1114 		}
1115 	}
1116 	rcu_read_unlock();
1117 
1118 	return NULL;
1119 }
1120 
hci_conn_hash_lookup_ba(struct hci_dev * hdev,__u8 type,bdaddr_t * ba)1121 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
1122 							__u8 type, bdaddr_t *ba)
1123 {
1124 	struct hci_conn_hash *h = &hdev->conn_hash;
1125 	struct hci_conn  *c;
1126 
1127 	rcu_read_lock();
1128 
1129 	list_for_each_entry_rcu(c, &h->list, list) {
1130 		if (c->type == type && !bacmp(&c->dst, ba)) {
1131 			rcu_read_unlock();
1132 			return c;
1133 		}
1134 	}
1135 
1136 	rcu_read_unlock();
1137 
1138 	return NULL;
1139 }
1140 
hci_conn_hash_lookup_le(struct hci_dev * hdev,bdaddr_t * ba,__u8 ba_type)1141 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
1142 						       bdaddr_t *ba,
1143 						       __u8 ba_type)
1144 {
1145 	struct hci_conn_hash *h = &hdev->conn_hash;
1146 	struct hci_conn  *c;
1147 
1148 	rcu_read_lock();
1149 
1150 	list_for_each_entry_rcu(c, &h->list, list) {
1151 		if (c->type != LE_LINK)
1152 		       continue;
1153 
1154 		if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
1155 			rcu_read_unlock();
1156 			return c;
1157 		}
1158 	}
1159 
1160 	rcu_read_unlock();
1161 
1162 	return NULL;
1163 }
1164 
hci_conn_hash_lookup_cis(struct hci_dev * hdev,bdaddr_t * ba,__u8 ba_type)1165 static inline struct hci_conn *hci_conn_hash_lookup_cis(struct hci_dev *hdev,
1166 							bdaddr_t *ba,
1167 							__u8 ba_type)
1168 {
1169 	struct hci_conn_hash *h = &hdev->conn_hash;
1170 	struct hci_conn  *c;
1171 
1172 	rcu_read_lock();
1173 
1174 	list_for_each_entry_rcu(c, &h->list, list) {
1175 		if (c->type != ISO_LINK)
1176 			continue;
1177 
1178 		if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
1179 			rcu_read_unlock();
1180 			return c;
1181 		}
1182 	}
1183 
1184 	rcu_read_unlock();
1185 
1186 	return NULL;
1187 }
1188 
hci_conn_hash_lookup_cig(struct hci_dev * hdev,__u8 handle)1189 static inline struct hci_conn *hci_conn_hash_lookup_cig(struct hci_dev *hdev,
1190 							__u8 handle)
1191 {
1192 	struct hci_conn_hash *h = &hdev->conn_hash;
1193 	struct hci_conn  *c;
1194 
1195 	rcu_read_lock();
1196 
1197 	list_for_each_entry_rcu(c, &h->list, list) {
1198 		if (c->type != ISO_LINK)
1199 			continue;
1200 
1201 		if (handle == c->iso_qos.cig) {
1202 			rcu_read_unlock();
1203 			return c;
1204 		}
1205 	}
1206 
1207 	rcu_read_unlock();
1208 
1209 	return NULL;
1210 }
1211 
hci_conn_hash_lookup_big(struct hci_dev * hdev,__u8 handle)1212 static inline struct hci_conn *hci_conn_hash_lookup_big(struct hci_dev *hdev,
1213 							__u8 handle)
1214 {
1215 	struct hci_conn_hash *h = &hdev->conn_hash;
1216 	struct hci_conn  *c;
1217 
1218 	rcu_read_lock();
1219 
1220 	list_for_each_entry_rcu(c, &h->list, list) {
1221 		if (bacmp(&c->dst, BDADDR_ANY) || c->type != ISO_LINK)
1222 			continue;
1223 
1224 		if (handle == c->iso_qos.big) {
1225 			rcu_read_unlock();
1226 			return c;
1227 		}
1228 	}
1229 
1230 	rcu_read_unlock();
1231 
1232 	return NULL;
1233 }
1234 
hci_conn_hash_lookup_state(struct hci_dev * hdev,__u8 type,__u16 state)1235 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
1236 							__u8 type, __u16 state)
1237 {
1238 	struct hci_conn_hash *h = &hdev->conn_hash;
1239 	struct hci_conn  *c;
1240 
1241 	rcu_read_lock();
1242 
1243 	list_for_each_entry_rcu(c, &h->list, list) {
1244 		if (c->type == type && c->state == state) {
1245 			rcu_read_unlock();
1246 			return c;
1247 		}
1248 	}
1249 
1250 	rcu_read_unlock();
1251 
1252 	return NULL;
1253 }
1254 
1255 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)1256 static inline void hci_conn_hash_list_state(struct hci_dev *hdev,
1257 					    hci_conn_func_t func, __u8 type,
1258 					    __u16 state, void *data)
1259 {
1260 	struct hci_conn_hash *h = &hdev->conn_hash;
1261 	struct hci_conn  *c;
1262 
1263 	if (!func)
1264 		return;
1265 
1266 	rcu_read_lock();
1267 
1268 	list_for_each_entry_rcu(c, &h->list, list) {
1269 		if (c->type == type && c->state == state)
1270 			func(c, data);
1271 	}
1272 
1273 	rcu_read_unlock();
1274 }
1275 
hci_lookup_le_connect(struct hci_dev * hdev)1276 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
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 == LE_LINK && c->state == BT_CONNECT &&
1285 		    !test_bit(HCI_CONN_SCANNING, &c->flags)) {
1286 			rcu_read_unlock();
1287 			return c;
1288 		}
1289 	}
1290 
1291 	rcu_read_unlock();
1292 
1293 	return NULL;
1294 }
1295 
1296 int hci_disconnect(struct hci_conn *conn, __u8 reason);
1297 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
1298 void hci_sco_setup(struct hci_conn *conn, __u8 status);
1299 bool hci_iso_setup_path(struct hci_conn *conn);
1300 int hci_le_create_cis(struct hci_conn *conn);
1301 
1302 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
1303 			      u8 role);
1304 int hci_conn_del(struct hci_conn *conn);
1305 void hci_conn_hash_flush(struct hci_dev *hdev);
1306 void hci_conn_check_pending(struct hci_dev *hdev);
1307 
1308 struct hci_chan *hci_chan_create(struct hci_conn *conn);
1309 void hci_chan_del(struct hci_chan *chan);
1310 void hci_chan_list_flush(struct hci_conn *conn);
1311 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
1312 
1313 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1314 				     u8 dst_type, u8 sec_level,
1315 				     u16 conn_timeout,
1316 				     enum conn_reasons conn_reason);
1317 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
1318 				u8 dst_type, bool dst_resolved, u8 sec_level,
1319 				u16 conn_timeout, u8 role);
1320 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1321 				 u8 sec_level, u8 auth_type,
1322 				 enum conn_reasons conn_reason);
1323 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1324 				 __u16 setting, struct bt_codec *codec);
1325 struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
1326 			      __u8 dst_type, struct bt_iso_qos *qos);
1327 struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
1328 				 __u8 dst_type, struct bt_iso_qos *qos);
1329 struct hci_conn *hci_connect_bis(struct hci_dev *hdev, bdaddr_t *dst,
1330 				 __u8 dst_type, struct bt_iso_qos *qos,
1331 				 __u8 data_len, __u8 *data);
1332 int hci_pa_create_sync(struct hci_dev *hdev, bdaddr_t *dst, __u8 dst_type,
1333 		       __u8 sid);
1334 int hci_le_big_create_sync(struct hci_dev *hdev, struct bt_iso_qos *qos,
1335 			   __u16 sync_handle, __u8 num_bis, __u8 bis[]);
1336 int hci_conn_check_link_mode(struct hci_conn *conn);
1337 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
1338 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
1339 		      bool initiator);
1340 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
1341 
1342 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
1343 
1344 void hci_conn_failed(struct hci_conn *conn, u8 status);
1345 
1346 /*
1347  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
1348  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
1349  * working or anything else. They just guarantee that the object is available
1350  * and can be dereferenced. So you can use its locks, local variables and any
1351  * other constant data.
1352  * Before accessing runtime data, you _must_ lock the object and then check that
1353  * it is still running. As soon as you release the locks, the connection might
1354  * get dropped, though.
1355  *
1356  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
1357  * how long the underlying connection is held. So every channel that runs on the
1358  * hci_conn object calls this to prevent the connection from disappearing. As
1359  * long as you hold a device, you must also guarantee that you have a valid
1360  * reference to the device via hci_conn_get() (or the initial reference from
1361  * hci_conn_add()).
1362  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
1363  * break because nobody cares for that. But this means, we cannot use
1364  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
1365  */
1366 
hci_conn_get(struct hci_conn * conn)1367 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
1368 {
1369 	get_device(&conn->dev);
1370 	return conn;
1371 }
1372 
hci_conn_put(struct hci_conn * conn)1373 static inline void hci_conn_put(struct hci_conn *conn)
1374 {
1375 	put_device(&conn->dev);
1376 }
1377 
hci_conn_hold(struct hci_conn * conn)1378 static inline void hci_conn_hold(struct hci_conn *conn)
1379 {
1380 	BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1381 
1382 	atomic_inc(&conn->refcnt);
1383 	cancel_delayed_work(&conn->disc_work);
1384 }
1385 
hci_conn_drop(struct hci_conn * conn)1386 static inline void hci_conn_drop(struct hci_conn *conn)
1387 {
1388 	BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1389 
1390 	if (atomic_dec_and_test(&conn->refcnt)) {
1391 		unsigned long timeo;
1392 
1393 		switch (conn->type) {
1394 		case ACL_LINK:
1395 		case LE_LINK:
1396 			cancel_delayed_work(&conn->idle_work);
1397 			if (conn->state == BT_CONNECTED) {
1398 				timeo = conn->disc_timeout;
1399 				if (!conn->out)
1400 					timeo *= 2;
1401 			} else {
1402 				timeo = 0;
1403 			}
1404 			break;
1405 
1406 		case AMP_LINK:
1407 			timeo = conn->disc_timeout;
1408 			break;
1409 
1410 		default:
1411 			timeo = 0;
1412 			break;
1413 		}
1414 
1415 		cancel_delayed_work(&conn->disc_work);
1416 		queue_delayed_work(conn->hdev->workqueue,
1417 				   &conn->disc_work, timeo);
1418 	}
1419 }
1420 
1421 /* ----- HCI Devices ----- */
hci_dev_put(struct hci_dev * d)1422 static inline void hci_dev_put(struct hci_dev *d)
1423 {
1424 	BT_DBG("%s orig refcnt %d", d->name,
1425 	       kref_read(&d->dev.kobj.kref));
1426 
1427 	put_device(&d->dev);
1428 }
1429 
hci_dev_hold(struct hci_dev * d)1430 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
1431 {
1432 	BT_DBG("%s orig refcnt %d", d->name,
1433 	       kref_read(&d->dev.kobj.kref));
1434 
1435 	get_device(&d->dev);
1436 	return d;
1437 }
1438 
1439 #define hci_dev_lock(d)		mutex_lock(&d->lock)
1440 #define hci_dev_unlock(d)	mutex_unlock(&d->lock)
1441 
1442 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1443 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1444 
hci_get_drvdata(struct hci_dev * hdev)1445 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1446 {
1447 	return dev_get_drvdata(&hdev->dev);
1448 }
1449 
hci_set_drvdata(struct hci_dev * hdev,void * data)1450 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1451 {
1452 	dev_set_drvdata(&hdev->dev, data);
1453 }
1454 
hci_get_priv(struct hci_dev * hdev)1455 static inline void *hci_get_priv(struct hci_dev *hdev)
1456 {
1457 	return (char *)hdev + sizeof(*hdev);
1458 }
1459 
1460 struct hci_dev *hci_dev_get(int index);
1461 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1462 
1463 struct hci_dev *hci_alloc_dev_priv(int sizeof_priv);
1464 
hci_alloc_dev(void)1465 static inline struct hci_dev *hci_alloc_dev(void)
1466 {
1467 	return hci_alloc_dev_priv(0);
1468 }
1469 
1470 void hci_free_dev(struct hci_dev *hdev);
1471 int hci_register_dev(struct hci_dev *hdev);
1472 void hci_unregister_dev(struct hci_dev *hdev);
1473 void hci_release_dev(struct hci_dev *hdev);
1474 int hci_register_suspend_notifier(struct hci_dev *hdev);
1475 int hci_unregister_suspend_notifier(struct hci_dev *hdev);
1476 int hci_suspend_dev(struct hci_dev *hdev);
1477 int hci_resume_dev(struct hci_dev *hdev);
1478 int hci_reset_dev(struct hci_dev *hdev);
1479 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1480 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1481 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1482 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1483 
hci_set_msft_opcode(struct hci_dev * hdev,__u16 opcode)1484 static inline void hci_set_msft_opcode(struct hci_dev *hdev, __u16 opcode)
1485 {
1486 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
1487 	hdev->msft_opcode = opcode;
1488 #endif
1489 }
1490 
hci_set_aosp_capable(struct hci_dev * hdev)1491 static inline void hci_set_aosp_capable(struct hci_dev *hdev)
1492 {
1493 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
1494 	hdev->aosp_capable = true;
1495 #endif
1496 }
1497 
1498 int hci_dev_open(__u16 dev);
1499 int hci_dev_close(__u16 dev);
1500 int hci_dev_do_close(struct hci_dev *hdev);
1501 int hci_dev_reset(__u16 dev);
1502 int hci_dev_reset_stat(__u16 dev);
1503 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1504 int hci_get_dev_list(void __user *arg);
1505 int hci_get_dev_info(void __user *arg);
1506 int hci_get_conn_list(void __user *arg);
1507 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1508 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1509 int hci_inquiry(void __user *arg);
1510 
1511 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1512 					   bdaddr_t *bdaddr, u8 type);
1513 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
1514 				    struct list_head *list, bdaddr_t *bdaddr,
1515 				    u8 type);
1516 struct bdaddr_list_with_flags *
1517 hci_bdaddr_list_lookup_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1518 				  u8 type);
1519 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1520 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1521 				 u8 type, u8 *peer_irk, u8 *local_irk);
1522 int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1523 				   u8 type, u32 flags);
1524 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1525 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1526 				 u8 type);
1527 int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1528 				   u8 type);
1529 void hci_bdaddr_list_clear(struct list_head *list);
1530 
1531 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1532 					       bdaddr_t *addr, u8 addr_type);
1533 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1534 					    bdaddr_t *addr, u8 addr_type);
1535 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1536 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1537 
1538 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1539 						  bdaddr_t *addr,
1540 						  u8 addr_type);
1541 
1542 void hci_uuids_clear(struct hci_dev *hdev);
1543 
1544 void hci_link_keys_clear(struct hci_dev *hdev);
1545 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1546 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1547 				  bdaddr_t *bdaddr, u8 *val, u8 type,
1548 				  u8 pin_len, bool *persistent);
1549 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1550 			    u8 addr_type, u8 type, u8 authenticated,
1551 			    u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1552 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1553 			     u8 addr_type, u8 role);
1554 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1555 void hci_smp_ltks_clear(struct hci_dev *hdev);
1556 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1557 
1558 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1559 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1560 				     u8 addr_type);
1561 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1562 			    u8 addr_type, u8 val[16], bdaddr_t *rpa);
1563 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1564 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16]);
1565 void hci_blocked_keys_clear(struct hci_dev *hdev);
1566 void hci_smp_irks_clear(struct hci_dev *hdev);
1567 
1568 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1569 
1570 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1571 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1572 					  bdaddr_t *bdaddr, u8 bdaddr_type);
1573 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1574 			    u8 bdaddr_type, u8 *hash192, u8 *rand192,
1575 			    u8 *hash256, u8 *rand256);
1576 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1577 			       u8 bdaddr_type);
1578 
1579 void hci_adv_instances_clear(struct hci_dev *hdev);
1580 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1581 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1582 struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1583 				      u32 flags, u16 adv_data_len, u8 *adv_data,
1584 				      u16 scan_rsp_len, u8 *scan_rsp_data,
1585 				      u16 timeout, u16 duration, s8 tx_power,
1586 				      u32 min_interval, u32 max_interval,
1587 				      u8 mesh_handle);
1588 struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1589 				      u32 flags, u8 data_len, u8 *data,
1590 				      u32 min_interval, u32 max_interval);
1591 int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1592 			 u16 adv_data_len, u8 *adv_data,
1593 			 u16 scan_rsp_len, u8 *scan_rsp_data);
1594 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1595 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired);
1596 u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance);
1597 bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance);
1598 
1599 void hci_adv_monitors_clear(struct hci_dev *hdev);
1600 void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1601 int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1602 int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle);
1603 int hci_remove_all_adv_monitor(struct hci_dev *hdev);
1604 bool hci_is_adv_monitoring(struct hci_dev *hdev);
1605 int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev);
1606 
1607 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1608 
1609 void hci_init_sysfs(struct hci_dev *hdev);
1610 void hci_conn_init_sysfs(struct hci_conn *conn);
1611 void hci_conn_add_sysfs(struct hci_conn *conn);
1612 void hci_conn_del_sysfs(struct hci_conn *conn);
1613 
1614 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1615 
1616 /* ----- LMP capabilities ----- */
1617 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1618 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1619 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1620 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1621 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1622 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1623 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1624 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1625 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1626 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1627 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1628 #define lmp_esco_2m_capable(dev)   ((dev)->features[0][5] & LMP_EDR_ESCO_2M)
1629 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1630 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1631 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1632 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1633 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1634 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1635 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1636 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1637 #define lmp_edr_2m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_2M)
1638 #define lmp_edr_3m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_3M)
1639 #define lmp_edr_3slot_capable(dev) ((dev)->features[0][4] & LMP_EDR_3SLOT)
1640 #define lmp_edr_5slot_capable(dev) ((dev)->features[0][5] & LMP_EDR_5SLOT)
1641 
1642 /* ----- Extended LMP capabilities ----- */
1643 #define lmp_cpb_central_capable(dev) ((dev)->features[2][0] & LMP_CPB_CENTRAL)
1644 #define lmp_cpb_peripheral_capable(dev) ((dev)->features[2][0] & LMP_CPB_PERIPHERAL)
1645 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1646 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1647 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1648 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1649 
1650 /* ----- Host capabilities ----- */
1651 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1652 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1653 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1654 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1655 
1656 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1657 				!hci_dev_test_flag(dev, HCI_AUTO_OFF))
1658 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1659 				hci_dev_test_flag(dev, HCI_SC_ENABLED))
1660 #define rpa_valid(dev)         (bacmp(&dev->rpa, BDADDR_ANY) && \
1661 				!hci_dev_test_flag(dev, HCI_RPA_EXPIRED))
1662 #define adv_rpa_valid(adv)     (bacmp(&adv->random_addr, BDADDR_ANY) && \
1663 				!adv->rpa_expired)
1664 
1665 #define scan_1m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_1M) || \
1666 		      ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_1M))
1667 
1668 #define scan_2m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_2M) || \
1669 		      ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_2M))
1670 
1671 #define scan_coded(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_CODED) || \
1672 			 ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_CODED))
1673 
1674 #define ll_privacy_capable(dev) ((dev)->le_features[0] & HCI_LE_LL_PRIVACY)
1675 
1676 /* Use LL Privacy based address resolution if supported */
1677 #define use_ll_privacy(dev) (ll_privacy_capable(dev) && \
1678 			     hci_dev_test_flag(dev, HCI_ENABLE_LL_PRIVACY))
1679 
1680 #define privacy_mode_capable(dev) (use_ll_privacy(dev) && \
1681 				   (hdev->commands[39] & 0x04))
1682 
1683 /* Use enhanced synchronous connection if command is supported and its quirk
1684  * has not been set.
1685  */
1686 #define enhanced_sync_conn_capable(dev) \
1687 	(((dev)->commands[29] & 0x08) && \
1688 	 !test_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &(dev)->quirks))
1689 
1690 /* Use ext scanning if set ext scan param and ext scan enable is supported */
1691 #define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \
1692 			   ((dev)->commands[37] & 0x40) && \
1693 			   !test_bit(HCI_QUIRK_BROKEN_EXT_SCAN, &(dev)->quirks))
1694 
1695 /* Use ext create connection if command is supported */
1696 #define use_ext_conn(dev) ((dev)->commands[37] & 0x80)
1697 
1698 /* Extended advertising support */
1699 #define ext_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_EXT_ADV))
1700 
1701 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 1789:
1702  *
1703  * C24: Mandatory if the LE Controller supports Connection State and either
1704  * LE Feature (LL Privacy) or LE Feature (Extended Advertising) is supported
1705  */
1706 #define use_enhanced_conn_complete(dev) (ll_privacy_capable(dev) || \
1707 					 ext_adv_capable(dev))
1708 
1709 /* Periodic advertising support */
1710 #define per_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_PERIODIC_ADV))
1711 
1712 /* CIS Master/Slave and BIS support */
1713 #define iso_capable(dev) (cis_capable(dev) || bis_capable(dev))
1714 #define cis_capable(dev) \
1715 	(cis_central_capable(dev) || cis_peripheral_capable(dev))
1716 #define cis_central_capable(dev) \
1717 	((dev)->le_features[3] & HCI_LE_CIS_CENTRAL)
1718 #define cis_peripheral_capable(dev) \
1719 	((dev)->le_features[3] & HCI_LE_CIS_PERIPHERAL)
1720 #define bis_capable(dev) ((dev)->le_features[3] & HCI_LE_ISO_BROADCASTER)
1721 
1722 #define mws_transport_config_capable(dev) (((dev)->commands[30] & 0x08) && \
1723 	(!test_bit(HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG, &(dev)->quirks)))
1724 
1725 /* ----- HCI protocols ----- */
1726 #define HCI_PROTO_DEFER             0x01
1727 
hci_proto_connect_ind(struct hci_dev * hdev,bdaddr_t * bdaddr,__u8 type,__u8 * flags)1728 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1729 					__u8 type, __u8 *flags)
1730 {
1731 	switch (type) {
1732 	case ACL_LINK:
1733 		return l2cap_connect_ind(hdev, bdaddr);
1734 
1735 	case SCO_LINK:
1736 	case ESCO_LINK:
1737 		return sco_connect_ind(hdev, bdaddr, flags);
1738 
1739 	case ISO_LINK:
1740 		return iso_connect_ind(hdev, bdaddr, flags);
1741 
1742 	default:
1743 		BT_ERR("unknown link type %d", type);
1744 		return -EINVAL;
1745 	}
1746 }
1747 
hci_proto_disconn_ind(struct hci_conn * conn)1748 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1749 {
1750 	if (conn->type != ACL_LINK && conn->type != LE_LINK)
1751 		return HCI_ERROR_REMOTE_USER_TERM;
1752 
1753 	return l2cap_disconn_ind(conn);
1754 }
1755 
1756 /* ----- HCI callbacks ----- */
1757 struct hci_cb {
1758 	struct list_head list;
1759 
1760 	char *name;
1761 
1762 	void (*connect_cfm)	(struct hci_conn *conn, __u8 status);
1763 	void (*disconn_cfm)	(struct hci_conn *conn, __u8 status);
1764 	void (*security_cfm)	(struct hci_conn *conn, __u8 status,
1765 								__u8 encrypt);
1766 	void (*key_change_cfm)	(struct hci_conn *conn, __u8 status);
1767 	void (*role_switch_cfm)	(struct hci_conn *conn, __u8 status, __u8 role);
1768 };
1769 
hci_connect_cfm(struct hci_conn * conn,__u8 status)1770 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1771 {
1772 	struct hci_cb *cb;
1773 
1774 	mutex_lock(&hci_cb_list_lock);
1775 	list_for_each_entry(cb, &hci_cb_list, list) {
1776 		if (cb->connect_cfm)
1777 			cb->connect_cfm(conn, status);
1778 	}
1779 	mutex_unlock(&hci_cb_list_lock);
1780 
1781 	if (conn->connect_cfm_cb)
1782 		conn->connect_cfm_cb(conn, status);
1783 }
1784 
hci_disconn_cfm(struct hci_conn * conn,__u8 reason)1785 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1786 {
1787 	struct hci_cb *cb;
1788 
1789 	mutex_lock(&hci_cb_list_lock);
1790 	list_for_each_entry(cb, &hci_cb_list, list) {
1791 		if (cb->disconn_cfm)
1792 			cb->disconn_cfm(conn, reason);
1793 	}
1794 	mutex_unlock(&hci_cb_list_lock);
1795 
1796 	if (conn->disconn_cfm_cb)
1797 		conn->disconn_cfm_cb(conn, reason);
1798 }
1799 
hci_auth_cfm(struct hci_conn * conn,__u8 status)1800 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1801 {
1802 	struct hci_cb *cb;
1803 	__u8 encrypt;
1804 
1805 	if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1806 		return;
1807 
1808 	encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1809 
1810 	mutex_lock(&hci_cb_list_lock);
1811 	list_for_each_entry(cb, &hci_cb_list, list) {
1812 		if (cb->security_cfm)
1813 			cb->security_cfm(conn, status, encrypt);
1814 	}
1815 	mutex_unlock(&hci_cb_list_lock);
1816 
1817 	if (conn->security_cfm_cb)
1818 		conn->security_cfm_cb(conn, status);
1819 }
1820 
hci_encrypt_cfm(struct hci_conn * conn,__u8 status)1821 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status)
1822 {
1823 	struct hci_cb *cb;
1824 	__u8 encrypt;
1825 
1826 	if (conn->state == BT_CONFIG) {
1827 		if (!status)
1828 			conn->state = BT_CONNECTED;
1829 
1830 		hci_connect_cfm(conn, status);
1831 		hci_conn_drop(conn);
1832 		return;
1833 	}
1834 
1835 	if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1836 		encrypt = 0x00;
1837 	else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
1838 		encrypt = 0x02;
1839 	else
1840 		encrypt = 0x01;
1841 
1842 	if (!status) {
1843 		if (conn->sec_level == BT_SECURITY_SDP)
1844 			conn->sec_level = BT_SECURITY_LOW;
1845 
1846 		if (conn->pending_sec_level > conn->sec_level)
1847 			conn->sec_level = conn->pending_sec_level;
1848 	}
1849 
1850 	mutex_lock(&hci_cb_list_lock);
1851 	list_for_each_entry(cb, &hci_cb_list, list) {
1852 		if (cb->security_cfm)
1853 			cb->security_cfm(conn, status, encrypt);
1854 	}
1855 	mutex_unlock(&hci_cb_list_lock);
1856 
1857 	if (conn->security_cfm_cb)
1858 		conn->security_cfm_cb(conn, status);
1859 }
1860 
hci_key_change_cfm(struct hci_conn * conn,__u8 status)1861 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1862 {
1863 	struct hci_cb *cb;
1864 
1865 	mutex_lock(&hci_cb_list_lock);
1866 	list_for_each_entry(cb, &hci_cb_list, list) {
1867 		if (cb->key_change_cfm)
1868 			cb->key_change_cfm(conn, status);
1869 	}
1870 	mutex_unlock(&hci_cb_list_lock);
1871 }
1872 
hci_role_switch_cfm(struct hci_conn * conn,__u8 status,__u8 role)1873 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1874 								__u8 role)
1875 {
1876 	struct hci_cb *cb;
1877 
1878 	mutex_lock(&hci_cb_list_lock);
1879 	list_for_each_entry(cb, &hci_cb_list, list) {
1880 		if (cb->role_switch_cfm)
1881 			cb->role_switch_cfm(conn, status, role);
1882 	}
1883 	mutex_unlock(&hci_cb_list_lock);
1884 }
1885 
hci_bdaddr_is_rpa(bdaddr_t * bdaddr,u8 addr_type)1886 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1887 {
1888 	if (addr_type != ADDR_LE_DEV_RANDOM)
1889 		return false;
1890 
1891 	if ((bdaddr->b[5] & 0xc0) == 0x40)
1892 	       return true;
1893 
1894 	return false;
1895 }
1896 
hci_is_identity_address(bdaddr_t * addr,u8 addr_type)1897 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1898 {
1899 	if (addr_type == ADDR_LE_DEV_PUBLIC)
1900 		return true;
1901 
1902 	/* Check for Random Static address type */
1903 	if ((addr->b[5] & 0xc0) == 0xc0)
1904 		return true;
1905 
1906 	return false;
1907 }
1908 
hci_get_irk(struct hci_dev * hdev,bdaddr_t * bdaddr,u8 addr_type)1909 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1910 					  bdaddr_t *bdaddr, u8 addr_type)
1911 {
1912 	if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1913 		return NULL;
1914 
1915 	return hci_find_irk_by_rpa(hdev, bdaddr);
1916 }
1917 
hci_check_conn_params(u16 min,u16 max,u16 latency,u16 to_multiplier)1918 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1919 					u16 to_multiplier)
1920 {
1921 	u16 max_latency;
1922 
1923 	if (min > max || min < 6 || max > 3200)
1924 		return -EINVAL;
1925 
1926 	if (to_multiplier < 10 || to_multiplier > 3200)
1927 		return -EINVAL;
1928 
1929 	if (max >= to_multiplier * 8)
1930 		return -EINVAL;
1931 
1932 	max_latency = (to_multiplier * 4 / max) - 1;
1933 	if (latency > 499 || latency > max_latency)
1934 		return -EINVAL;
1935 
1936 	return 0;
1937 }
1938 
1939 int hci_register_cb(struct hci_cb *hcb);
1940 int hci_unregister_cb(struct hci_cb *hcb);
1941 
1942 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
1943 		   const void *param);
1944 
1945 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1946 		 const void *param);
1947 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1948 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1949 void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb);
1950 
1951 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1952 void *hci_recv_event_data(struct hci_dev *hdev, __u8 event);
1953 
1954 u32 hci_conn_get_phy(struct hci_conn *conn);
1955 
1956 /* ----- HCI Sockets ----- */
1957 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1958 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1959 			 int flag, struct sock *skip_sk);
1960 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1961 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
1962 				 void *data, u16 data_len, ktime_t tstamp,
1963 				 int flag, struct sock *skip_sk);
1964 
1965 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1966 
1967 #define HCI_MGMT_VAR_LEN	BIT(0)
1968 #define HCI_MGMT_NO_HDEV	BIT(1)
1969 #define HCI_MGMT_UNTRUSTED	BIT(2)
1970 #define HCI_MGMT_UNCONFIGURED	BIT(3)
1971 #define HCI_MGMT_HDEV_OPTIONAL	BIT(4)
1972 
1973 struct hci_mgmt_handler {
1974 	int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1975 		     u16 data_len);
1976 	size_t data_len;
1977 	unsigned long flags;
1978 };
1979 
1980 struct hci_mgmt_chan {
1981 	struct list_head list;
1982 	unsigned short channel;
1983 	size_t handler_count;
1984 	const struct hci_mgmt_handler *handlers;
1985 	void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1986 };
1987 
1988 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1989 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1990 
1991 /* Management interface */
1992 #define DISCOV_TYPE_BREDR		(BIT(BDADDR_BREDR))
1993 #define DISCOV_TYPE_LE			(BIT(BDADDR_LE_PUBLIC) | \
1994 					 BIT(BDADDR_LE_RANDOM))
1995 #define DISCOV_TYPE_INTERLEAVED		(BIT(BDADDR_BREDR) | \
1996 					 BIT(BDADDR_LE_PUBLIC) | \
1997 					 BIT(BDADDR_LE_RANDOM))
1998 
1999 /* These LE scan and inquiry parameters were chosen according to LE General
2000  * Discovery Procedure specification.
2001  */
2002 #define DISCOV_LE_SCAN_WIN		0x12
2003 #define DISCOV_LE_SCAN_INT		0x12
2004 #define DISCOV_LE_TIMEOUT		10240	/* msec */
2005 #define DISCOV_INTERLEAVED_TIMEOUT	5120	/* msec */
2006 #define DISCOV_INTERLEAVED_INQUIRY_LEN	0x04
2007 #define DISCOV_BREDR_INQUIRY_LEN	0x08
2008 #define DISCOV_LE_RESTART_DELAY		msecs_to_jiffies(200)	/* msec */
2009 #define DISCOV_LE_FAST_ADV_INT_MIN	0x00A0	/* 100 msec */
2010 #define DISCOV_LE_FAST_ADV_INT_MAX	0x00F0	/* 150 msec */
2011 #define DISCOV_LE_PER_ADV_INT_MIN	0x00A0	/* 200 msec */
2012 #define DISCOV_LE_PER_ADV_INT_MAX	0x00A0	/* 200 msec */
2013 #define DISCOV_LE_ADV_MESH_MIN		0x00A0  /* 100 msec */
2014 #define DISCOV_LE_ADV_MESH_MAX		0x00A0  /* 100 msec */
2015 #define INTERVAL_TO_MS(x)		(((x) * 10) / 0x10)
2016 
2017 #define NAME_RESOLVE_DURATION		msecs_to_jiffies(10240)	/* 10.24 sec */
2018 
2019 void mgmt_fill_version_info(void *ver);
2020 int mgmt_new_settings(struct hci_dev *hdev);
2021 void mgmt_index_added(struct hci_dev *hdev);
2022 void mgmt_index_removed(struct hci_dev *hdev);
2023 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
2024 void mgmt_power_on(struct hci_dev *hdev, int err);
2025 void __mgmt_power_off(struct hci_dev *hdev);
2026 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
2027 		       bool persistent);
2028 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
2029 			   u8 *name, u8 name_len);
2030 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
2031 			      u8 link_type, u8 addr_type, u8 reason,
2032 			      bool mgmt_connected);
2033 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
2034 			    u8 link_type, u8 addr_type, u8 status);
2035 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2036 			 u8 addr_type, u8 status);
2037 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
2038 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2039 				  u8 status);
2040 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2041 				      u8 status);
2042 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2043 			      u8 link_type, u8 addr_type, u32 value,
2044 			      u8 confirm_hint);
2045 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2046 				     u8 link_type, u8 addr_type, u8 status);
2047 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2048 					 u8 link_type, u8 addr_type, u8 status);
2049 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2050 			      u8 link_type, u8 addr_type);
2051 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2052 				     u8 link_type, u8 addr_type, u8 status);
2053 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2054 					 u8 link_type, u8 addr_type, u8 status);
2055 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
2056 			     u8 link_type, u8 addr_type, u32 passkey,
2057 			     u8 entered);
2058 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
2059 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
2060 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
2061 				    u8 status);
2062 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
2063 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
2064 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
2065 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2066 		       u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
2067 		       u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len,
2068 		       u64 instant);
2069 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2070 		      u8 addr_type, s8 rssi, u8 *name, u8 name_len);
2071 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
2072 void mgmt_suspending(struct hci_dev *hdev, u8 state);
2073 void mgmt_resuming(struct hci_dev *hdev, u8 reason, bdaddr_t *bdaddr,
2074 		   u8 addr_type);
2075 bool mgmt_powering_down(struct hci_dev *hdev);
2076 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
2077 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
2078 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
2079 		   bool persistent);
2080 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
2081 			 u8 bdaddr_type, u8 store_hint, u16 min_interval,
2082 			 u16 max_interval, u16 latency, u16 timeout);
2083 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
2084 bool mgmt_get_connectable(struct hci_dev *hdev);
2085 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
2086 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
2087 			    u8 instance);
2088 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
2089 			      u8 instance);
2090 void mgmt_adv_monitor_removed(struct hci_dev *hdev, u16 handle);
2091 int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip);
2092 void mgmt_adv_monitor_device_lost(struct hci_dev *hdev, u16 handle,
2093 				  bdaddr_t *bdaddr, u8 addr_type);
2094 
2095 int hci_abort_conn(struct hci_conn *conn, u8 reason);
2096 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
2097 		      u16 to_multiplier);
2098 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
2099 		      __u8 ltk[16], __u8 key_size);
2100 
2101 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2102 			       u8 *bdaddr_type);
2103 
2104 #define SCO_AIRMODE_MASK       0x0003
2105 #define SCO_AIRMODE_CVSD       0x0000
2106 #define SCO_AIRMODE_TRANSP     0x0003
2107 
2108 #define LOCAL_CODEC_ACL_MASK	BIT(0)
2109 #define LOCAL_CODEC_SCO_MASK	BIT(1)
2110 
2111 #define TRANSPORT_TYPE_MAX	0x04
2112 
2113 #endif /* __HCI_CORE_H */
2114