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     le_num;
130 	unsigned int     le_num_peripheral;
131 };
132 
133 struct bdaddr_list {
134 	struct list_head list;
135 	bdaddr_t bdaddr;
136 	u8 bdaddr_type;
137 };
138 
139 struct codec_list {
140 	struct list_head list;
141 	u8	id;
142 	__u16	cid;
143 	__u16	vid;
144 	u8	transport;
145 	u8	num_caps;
146 	u32	len;
147 	struct hci_codec_caps caps[];
148 };
149 
150 struct bdaddr_list_with_irk {
151 	struct list_head list;
152 	bdaddr_t bdaddr;
153 	u8 bdaddr_type;
154 	u8 peer_irk[16];
155 	u8 local_irk[16];
156 };
157 
158 /* Bitmask of connection flags */
159 enum hci_conn_flags {
160 	HCI_CONN_FLAG_REMOTE_WAKEUP = 1,
161 	HCI_CONN_FLAG_DEVICE_PRIVACY = 2,
162 };
163 typedef u8 hci_conn_flags_t;
164 
165 struct bdaddr_list_with_flags {
166 	struct list_head list;
167 	bdaddr_t bdaddr;
168 	u8 bdaddr_type;
169 	hci_conn_flags_t flags;
170 };
171 
172 struct bt_uuid {
173 	struct list_head list;
174 	u8 uuid[16];
175 	u8 size;
176 	u8 svc_hint;
177 };
178 
179 struct blocked_key {
180 	struct list_head list;
181 	struct rcu_head rcu;
182 	u8 type;
183 	u8 val[16];
184 };
185 
186 struct smp_csrk {
187 	bdaddr_t bdaddr;
188 	u8 bdaddr_type;
189 	u8 type;
190 	u8 val[16];
191 };
192 
193 struct smp_ltk {
194 	struct list_head list;
195 	struct rcu_head rcu;
196 	bdaddr_t bdaddr;
197 	u8 bdaddr_type;
198 	u8 authenticated;
199 	u8 type;
200 	u8 enc_size;
201 	__le16 ediv;
202 	__le64 rand;
203 	u8 val[16];
204 };
205 
206 struct smp_irk {
207 	struct list_head list;
208 	struct rcu_head rcu;
209 	bdaddr_t rpa;
210 	bdaddr_t bdaddr;
211 	u8 addr_type;
212 	u8 val[16];
213 };
214 
215 struct link_key {
216 	struct list_head list;
217 	struct rcu_head rcu;
218 	bdaddr_t bdaddr;
219 	u8 type;
220 	u8 val[HCI_LINK_KEY_SIZE];
221 	u8 pin_len;
222 };
223 
224 struct oob_data {
225 	struct list_head list;
226 	bdaddr_t bdaddr;
227 	u8 bdaddr_type;
228 	u8 present;
229 	u8 hash192[16];
230 	u8 rand192[16];
231 	u8 hash256[16];
232 	u8 rand256[16];
233 };
234 
235 struct adv_info {
236 	struct list_head list;
237 	bool enabled;
238 	bool pending;
239 	__u8	instance;
240 	__u32	flags;
241 	__u16	timeout;
242 	__u16	remaining_time;
243 	__u16	duration;
244 	__u16	adv_data_len;
245 	__u8	adv_data[HCI_MAX_EXT_AD_LENGTH];
246 	__u16	scan_rsp_len;
247 	__u8	scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
248 	__s8	tx_power;
249 	__u32   min_interval;
250 	__u32   max_interval;
251 	bdaddr_t	random_addr;
252 	bool 		rpa_expired;
253 	struct delayed_work	rpa_expired_cb;
254 };
255 
256 #define HCI_MAX_ADV_INSTANCES		5
257 #define HCI_DEFAULT_ADV_DURATION	2
258 
259 #define HCI_ADV_TX_POWER_NO_PREFERENCE 0x7F
260 
261 struct monitored_device {
262 	struct list_head list;
263 
264 	bdaddr_t bdaddr;
265 	__u8     addr_type;
266 	__u16    handle;
267 	bool     notified;
268 };
269 
270 struct adv_pattern {
271 	struct list_head list;
272 	__u8 ad_type;
273 	__u8 offset;
274 	__u8 length;
275 	__u8 value[HCI_MAX_AD_LENGTH];
276 };
277 
278 struct adv_rssi_thresholds {
279 	__s8 low_threshold;
280 	__s8 high_threshold;
281 	__u16 low_threshold_timeout;
282 	__u16 high_threshold_timeout;
283 	__u8 sampling_period;
284 };
285 
286 struct adv_monitor {
287 	struct list_head patterns;
288 	struct adv_rssi_thresholds rssi;
289 	__u16		handle;
290 
291 	enum {
292 		ADV_MONITOR_STATE_NOT_REGISTERED,
293 		ADV_MONITOR_STATE_REGISTERED,
294 		ADV_MONITOR_STATE_OFFLOADED
295 	} state;
296 };
297 
298 #define HCI_MIN_ADV_MONITOR_HANDLE		1
299 #define HCI_MAX_ADV_MONITOR_NUM_HANDLES		32
300 #define HCI_MAX_ADV_MONITOR_NUM_PATTERNS	16
301 #define HCI_ADV_MONITOR_EXT_NONE		1
302 #define HCI_ADV_MONITOR_EXT_MSFT		2
303 
304 #define HCI_MAX_SHORT_NAME_LENGTH	10
305 
306 #define HCI_CONN_HANDLE_UNSET		0xffff
307 #define HCI_CONN_HANDLE_MAX		0x0eff
308 
309 /* Min encryption key size to match with SMP */
310 #define HCI_MIN_ENC_KEY_SIZE		7
311 
312 /* Default LE RPA expiry time, 15 minutes */
313 #define HCI_DEFAULT_RPA_TIMEOUT		(15 * 60)
314 
315 /* Default min/max age of connection information (1s/3s) */
316 #define DEFAULT_CONN_INFO_MIN_AGE	1000
317 #define DEFAULT_CONN_INFO_MAX_AGE	3000
318 /* Default authenticated payload timeout 30s */
319 #define DEFAULT_AUTH_PAYLOAD_TIMEOUT   0x0bb8
320 
321 struct amp_assoc {
322 	__u16	len;
323 	__u16	offset;
324 	__u16	rem_len;
325 	__u16	len_so_far;
326 	__u8	data[HCI_MAX_AMP_ASSOC_SIZE];
327 };
328 
329 #define HCI_MAX_PAGES	3
330 
331 struct hci_dev {
332 	struct list_head list;
333 	struct mutex	lock;
334 
335 	char		name[8];
336 	unsigned long	flags;
337 	__u16		id;
338 	__u8		bus;
339 	__u8		dev_type;
340 	bdaddr_t	bdaddr;
341 	bdaddr_t	setup_addr;
342 	bdaddr_t	public_addr;
343 	bdaddr_t	random_addr;
344 	bdaddr_t	static_addr;
345 	__u8		adv_addr_type;
346 	__u8		dev_name[HCI_MAX_NAME_LENGTH];
347 	__u8		short_name[HCI_MAX_SHORT_NAME_LENGTH];
348 	__u8		eir[HCI_MAX_EIR_LENGTH];
349 	__u16		appearance;
350 	__u8		dev_class[3];
351 	__u8		major_class;
352 	__u8		minor_class;
353 	__u8		max_page;
354 	__u8		features[HCI_MAX_PAGES][8];
355 	__u8		le_features[8];
356 	__u8		le_accept_list_size;
357 	__u8		le_resolv_list_size;
358 	__u8		le_num_of_adv_sets;
359 	__u8		le_states[8];
360 	__u8		commands[64];
361 	__u8		hci_ver;
362 	__u16		hci_rev;
363 	__u8		lmp_ver;
364 	__u16		manufacturer;
365 	__u16		lmp_subver;
366 	__u16		voice_setting;
367 	__u8		num_iac;
368 	__u16		stored_max_keys;
369 	__u16		stored_num_keys;
370 	__u8		io_capability;
371 	__s8		inq_tx_power;
372 	__u8		err_data_reporting;
373 	__u16		page_scan_interval;
374 	__u16		page_scan_window;
375 	__u8		page_scan_type;
376 	__u8		le_adv_channel_map;
377 	__u16		le_adv_min_interval;
378 	__u16		le_adv_max_interval;
379 	__u8		le_scan_type;
380 	__u16		le_scan_interval;
381 	__u16		le_scan_window;
382 	__u16		le_scan_int_suspend;
383 	__u16		le_scan_window_suspend;
384 	__u16		le_scan_int_discovery;
385 	__u16		le_scan_window_discovery;
386 	__u16		le_scan_int_adv_monitor;
387 	__u16		le_scan_window_adv_monitor;
388 	__u16		le_scan_int_connect;
389 	__u16		le_scan_window_connect;
390 	__u16		le_conn_min_interval;
391 	__u16		le_conn_max_interval;
392 	__u16		le_conn_latency;
393 	__u16		le_supv_timeout;
394 	__u16		le_def_tx_len;
395 	__u16		le_def_tx_time;
396 	__u16		le_max_tx_len;
397 	__u16		le_max_tx_time;
398 	__u16		le_max_rx_len;
399 	__u16		le_max_rx_time;
400 	__u8		le_max_key_size;
401 	__u8		le_min_key_size;
402 	__u16		discov_interleaved_timeout;
403 	__u16		conn_info_min_age;
404 	__u16		conn_info_max_age;
405 	__u16		auth_payload_timeout;
406 	__u8		min_enc_key_size;
407 	__u8		max_enc_key_size;
408 	__u8		pairing_opts;
409 	__u8		ssp_debug_mode;
410 	__u8		hw_error_code;
411 	__u32		clock;
412 	__u16		advmon_allowlist_duration;
413 	__u16		advmon_no_filter_duration;
414 	__u8		enable_advmon_interleave_scan;
415 
416 	__u16		devid_source;
417 	__u16		devid_vendor;
418 	__u16		devid_product;
419 	__u16		devid_version;
420 
421 	__u8		def_page_scan_type;
422 	__u16		def_page_scan_int;
423 	__u16		def_page_scan_window;
424 	__u8		def_inq_scan_type;
425 	__u16		def_inq_scan_int;
426 	__u16		def_inq_scan_window;
427 	__u16		def_br_lsto;
428 	__u16		def_page_timeout;
429 	__u16		def_multi_adv_rotation_duration;
430 	__u16		def_le_autoconnect_timeout;
431 	__s8		min_le_tx_power;
432 	__s8		max_le_tx_power;
433 
434 	__u16		pkt_type;
435 	__u16		esco_type;
436 	__u16		link_policy;
437 	__u16		link_mode;
438 
439 	__u32		idle_timeout;
440 	__u16		sniff_min_interval;
441 	__u16		sniff_max_interval;
442 
443 	__u8		amp_status;
444 	__u32		amp_total_bw;
445 	__u32		amp_max_bw;
446 	__u32		amp_min_latency;
447 	__u32		amp_max_pdu;
448 	__u8		amp_type;
449 	__u16		amp_pal_cap;
450 	__u16		amp_assoc_size;
451 	__u32		amp_max_flush_to;
452 	__u32		amp_be_flush_to;
453 
454 	struct amp_assoc	loc_assoc;
455 
456 	__u8		flow_ctl_mode;
457 
458 	unsigned int	auto_accept_delay;
459 
460 	unsigned long	quirks;
461 
462 	atomic_t	cmd_cnt;
463 	unsigned int	acl_cnt;
464 	unsigned int	sco_cnt;
465 	unsigned int	le_cnt;
466 
467 	unsigned int	acl_mtu;
468 	unsigned int	sco_mtu;
469 	unsigned int	le_mtu;
470 	unsigned int	acl_pkts;
471 	unsigned int	sco_pkts;
472 	unsigned int	le_pkts;
473 
474 	__u16		block_len;
475 	__u16		block_mtu;
476 	__u16		num_blocks;
477 	__u16		block_cnt;
478 
479 	unsigned long	acl_last_tx;
480 	unsigned long	sco_last_tx;
481 	unsigned long	le_last_tx;
482 
483 	__u8		le_tx_def_phys;
484 	__u8		le_rx_def_phys;
485 
486 	struct workqueue_struct	*workqueue;
487 	struct workqueue_struct	*req_workqueue;
488 
489 	struct work_struct	power_on;
490 	struct delayed_work	power_off;
491 	struct work_struct	error_reset;
492 	struct work_struct	cmd_sync_work;
493 	struct list_head	cmd_sync_work_list;
494 	struct mutex		cmd_sync_work_lock;
495 	struct work_struct	cmd_sync_cancel_work;
496 
497 	__u16			discov_timeout;
498 	struct delayed_work	discov_off;
499 
500 	struct delayed_work	service_cache;
501 
502 	struct delayed_work	cmd_timer;
503 	struct delayed_work	ncmd_timer;
504 
505 	struct work_struct	rx_work;
506 	struct work_struct	cmd_work;
507 	struct work_struct	tx_work;
508 
509 	struct work_struct	discov_update;
510 	struct work_struct	scan_update;
511 	struct delayed_work	le_scan_disable;
512 	struct delayed_work	le_scan_restart;
513 
514 	struct sk_buff_head	rx_q;
515 	struct sk_buff_head	raw_q;
516 	struct sk_buff_head	cmd_q;
517 
518 	struct sk_buff		*sent_cmd;
519 
520 	struct mutex		req_lock;
521 	wait_queue_head_t	req_wait_q;
522 	__u32			req_status;
523 	__u32			req_result;
524 	struct sk_buff		*req_skb;
525 
526 	void			*smp_data;
527 	void			*smp_bredr_data;
528 
529 	struct discovery_state	discovery;
530 
531 	int			discovery_old_state;
532 	bool			discovery_paused;
533 	int			advertising_old_state;
534 	bool			advertising_paused;
535 
536 	struct notifier_block	suspend_notifier;
537 	enum suspended_state	suspend_state_next;
538 	enum suspended_state	suspend_state;
539 	bool			scanning_paused;
540 	bool			suspended;
541 	u8			wake_reason;
542 	bdaddr_t		wake_addr;
543 	u8			wake_addr_type;
544 
545 	struct hci_conn_hash	conn_hash;
546 
547 	struct list_head	mgmt_pending;
548 	struct list_head	reject_list;
549 	struct list_head	accept_list;
550 	struct list_head	uuids;
551 	struct list_head	link_keys;
552 	struct list_head	long_term_keys;
553 	struct list_head	identity_resolving_keys;
554 	struct list_head	remote_oob_data;
555 	struct list_head	le_accept_list;
556 	struct list_head	le_resolv_list;
557 	struct list_head	le_conn_params;
558 	struct list_head	pend_le_conns;
559 	struct list_head	pend_le_reports;
560 	struct list_head	blocked_keys;
561 	struct list_head	local_codecs;
562 
563 	struct hci_dev_stats	stat;
564 
565 	atomic_t		promisc;
566 
567 	const char		*hw_info;
568 	const char		*fw_info;
569 	struct dentry		*debugfs;
570 
571 	struct device		dev;
572 
573 	struct rfkill		*rfkill;
574 
575 	DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
576 	hci_conn_flags_t	conn_flags;
577 
578 	__s8			adv_tx_power;
579 	__u8			adv_data[HCI_MAX_EXT_AD_LENGTH];
580 	__u8			adv_data_len;
581 	__u8			scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
582 	__u8			scan_rsp_data_len;
583 
584 	struct list_head	adv_instances;
585 	unsigned int		adv_instance_cnt;
586 	__u8			cur_adv_instance;
587 	__u16			adv_instance_timeout;
588 	struct delayed_work	adv_instance_expire;
589 
590 	struct idr		adv_monitors_idr;
591 	unsigned int		adv_monitors_cnt;
592 
593 	__u8			irk[16];
594 	__u32			rpa_timeout;
595 	struct delayed_work	rpa_expired;
596 	bdaddr_t		rpa;
597 
598 	enum {
599 		INTERLEAVE_SCAN_NONE,
600 		INTERLEAVE_SCAN_NO_FILTER,
601 		INTERLEAVE_SCAN_ALLOWLIST
602 	} interleave_scan_state;
603 
604 	struct delayed_work	interleave_scan;
605 
606 	struct list_head	monitored_devices;
607 	bool			advmon_pend_notify;
608 
609 #if IS_ENABLED(CONFIG_BT_LEDS)
610 	struct led_trigger	*power_led;
611 #endif
612 
613 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
614 	__u16			msft_opcode;
615 	void			*msft_data;
616 	bool			msft_curve_validity;
617 #endif
618 
619 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
620 	bool			aosp_capable;
621 	bool			aosp_quality_report;
622 #endif
623 
624 	int (*open)(struct hci_dev *hdev);
625 	int (*close)(struct hci_dev *hdev);
626 	int (*flush)(struct hci_dev *hdev);
627 	int (*setup)(struct hci_dev *hdev);
628 	int (*shutdown)(struct hci_dev *hdev);
629 	int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
630 	void (*notify)(struct hci_dev *hdev, unsigned int evt);
631 	void (*hw_error)(struct hci_dev *hdev, u8 code);
632 	int (*post_init)(struct hci_dev *hdev);
633 	int (*set_diag)(struct hci_dev *hdev, bool enable);
634 	int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
635 	void (*cmd_timeout)(struct hci_dev *hdev);
636 	bool (*wakeup)(struct hci_dev *hdev);
637 	int (*set_quality_report)(struct hci_dev *hdev, bool enable);
638 	int (*get_data_path_id)(struct hci_dev *hdev, __u8 *data_path);
639 	int (*get_codec_config_data)(struct hci_dev *hdev, __u8 type,
640 				     struct bt_codec *codec, __u8 *vnd_len,
641 				     __u8 **vnd_data);
642 };
643 
644 #define HCI_PHY_HANDLE(handle)	(handle & 0xff)
645 
646 enum conn_reasons {
647 	CONN_REASON_PAIR_DEVICE,
648 	CONN_REASON_L2CAP_CHAN,
649 	CONN_REASON_SCO_CONNECT,
650 };
651 
652 struct hci_conn {
653 	struct list_head list;
654 
655 	atomic_t	refcnt;
656 
657 	bdaddr_t	dst;
658 	__u8		dst_type;
659 	bdaddr_t	src;
660 	__u8		src_type;
661 	bdaddr_t	init_addr;
662 	__u8		init_addr_type;
663 	bdaddr_t	resp_addr;
664 	__u8		resp_addr_type;
665 	__u8		adv_instance;
666 	__u16		handle;
667 	__u16		state;
668 	__u8		mode;
669 	__u8		type;
670 	__u8		role;
671 	bool		out;
672 	__u8		attempt;
673 	__u8		dev_class[3];
674 	__u8		features[HCI_MAX_PAGES][8];
675 	__u16		pkt_type;
676 	__u16		link_policy;
677 	__u8		key_type;
678 	__u8		auth_type;
679 	__u8		sec_level;
680 	__u8		pending_sec_level;
681 	__u8		pin_length;
682 	__u8		enc_key_size;
683 	__u8		io_capability;
684 	__u32		passkey_notify;
685 	__u8		passkey_entered;
686 	__u16		disc_timeout;
687 	__u16		conn_timeout;
688 	__u16		setting;
689 	__u16		auth_payload_timeout;
690 	__u16		le_conn_min_interval;
691 	__u16		le_conn_max_interval;
692 	__u16		le_conn_interval;
693 	__u16		le_conn_latency;
694 	__u16		le_supv_timeout;
695 	__u8		le_adv_data[HCI_MAX_AD_LENGTH];
696 	__u8		le_adv_data_len;
697 	__u8		le_tx_phy;
698 	__u8		le_rx_phy;
699 	__s8		rssi;
700 	__s8		tx_power;
701 	__s8		max_tx_power;
702 	unsigned long	flags;
703 
704 	enum conn_reasons conn_reason;
705 
706 	__u32		clock;
707 	__u16		clock_accuracy;
708 
709 	unsigned long	conn_info_timestamp;
710 
711 	__u8		remote_cap;
712 	__u8		remote_auth;
713 	__u8		remote_id;
714 
715 	unsigned int	sent;
716 
717 	struct sk_buff_head data_q;
718 	struct list_head chan_list;
719 
720 	struct delayed_work disc_work;
721 	struct delayed_work auto_accept_work;
722 	struct delayed_work idle_work;
723 	struct delayed_work le_conn_timeout;
724 	struct work_struct  le_scan_cleanup;
725 
726 	struct device	dev;
727 	struct dentry	*debugfs;
728 
729 	struct hci_dev	*hdev;
730 	void		*l2cap_data;
731 	void		*sco_data;
732 	struct amp_mgr	*amp_mgr;
733 
734 	struct hci_conn	*link;
735 	struct bt_codec codec;
736 
737 	void (*connect_cfm_cb)	(struct hci_conn *conn, u8 status);
738 	void (*security_cfm_cb)	(struct hci_conn *conn, u8 status);
739 	void (*disconn_cfm_cb)	(struct hci_conn *conn, u8 reason);
740 };
741 
742 struct hci_chan {
743 	struct list_head list;
744 	__u16 handle;
745 	struct hci_conn *conn;
746 	struct sk_buff_head data_q;
747 	unsigned int	sent;
748 	__u8		state;
749 	bool		amp;
750 };
751 
752 struct hci_conn_params {
753 	struct list_head list;
754 	struct list_head action;
755 
756 	bdaddr_t addr;
757 	u8 addr_type;
758 
759 	u16 conn_min_interval;
760 	u16 conn_max_interval;
761 	u16 conn_latency;
762 	u16 supervision_timeout;
763 
764 	enum {
765 		HCI_AUTO_CONN_DISABLED,
766 		HCI_AUTO_CONN_REPORT,
767 		HCI_AUTO_CONN_DIRECT,
768 		HCI_AUTO_CONN_ALWAYS,
769 		HCI_AUTO_CONN_LINK_LOSS,
770 		HCI_AUTO_CONN_EXPLICIT,
771 	} auto_connect;
772 
773 	struct hci_conn *conn;
774 	bool explicit_connect;
775 	hci_conn_flags_t flags;
776 	u8  privacy_mode;
777 };
778 
779 extern struct list_head hci_dev_list;
780 extern struct list_head hci_cb_list;
781 extern rwlock_t hci_dev_list_lock;
782 extern struct mutex hci_cb_list_lock;
783 
784 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
785 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
786 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
787 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
788 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
789 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
790 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
791 
792 #define hci_dev_clear_volatile_flags(hdev)			\
793 	do {							\
794 		hci_dev_clear_flag(hdev, HCI_LE_SCAN);		\
795 		hci_dev_clear_flag(hdev, HCI_LE_ADV);		\
796 		hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);\
797 		hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);	\
798 		hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);	\
799 	} while (0)
800 
801 #define hci_dev_le_state_simultaneous(hdev) \
802 	(test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) && \
803 	 (hdev->le_states[4] & 0x08) &&	/* Central */ \
804 	 (hdev->le_states[4] & 0x40) &&	/* Peripheral */ \
805 	 (hdev->le_states[3] & 0x10))	/* Simultaneous */
806 
807 /* ----- HCI interface to upper protocols ----- */
808 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
809 int l2cap_disconn_ind(struct hci_conn *hcon);
810 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
811 
812 #if IS_ENABLED(CONFIG_BT_BREDR)
813 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
814 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
815 #else
sco_connect_ind(struct hci_dev * hdev,bdaddr_t * bdaddr,__u8 * flags)816 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
817 				  __u8 *flags)
818 {
819 	return 0;
820 }
821 
sco_recv_scodata(struct hci_conn * hcon,struct sk_buff * skb)822 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
823 {
824 }
825 #endif
826 
827 /* ----- Inquiry cache ----- */
828 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
829 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
830 
discovery_init(struct hci_dev * hdev)831 static inline void discovery_init(struct hci_dev *hdev)
832 {
833 	hdev->discovery.state = DISCOVERY_STOPPED;
834 	INIT_LIST_HEAD(&hdev->discovery.all);
835 	INIT_LIST_HEAD(&hdev->discovery.unknown);
836 	INIT_LIST_HEAD(&hdev->discovery.resolve);
837 	hdev->discovery.report_invalid_rssi = true;
838 	hdev->discovery.rssi = HCI_RSSI_INVALID;
839 }
840 
hci_discovery_filter_clear(struct hci_dev * hdev)841 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
842 {
843 	hdev->discovery.result_filtering = false;
844 	hdev->discovery.report_invalid_rssi = true;
845 	hdev->discovery.rssi = HCI_RSSI_INVALID;
846 	hdev->discovery.uuid_count = 0;
847 	kfree(hdev->discovery.uuids);
848 	hdev->discovery.uuids = NULL;
849 	hdev->discovery.scan_start = 0;
850 	hdev->discovery.scan_duration = 0;
851 }
852 
853 bool hci_discovery_active(struct hci_dev *hdev);
854 
855 void hci_discovery_set_state(struct hci_dev *hdev, int state);
856 
inquiry_cache_empty(struct hci_dev * hdev)857 static inline int inquiry_cache_empty(struct hci_dev *hdev)
858 {
859 	return list_empty(&hdev->discovery.all);
860 }
861 
inquiry_cache_age(struct hci_dev * hdev)862 static inline long inquiry_cache_age(struct hci_dev *hdev)
863 {
864 	struct discovery_state *c = &hdev->discovery;
865 	return jiffies - c->timestamp;
866 }
867 
inquiry_entry_age(struct inquiry_entry * e)868 static inline long inquiry_entry_age(struct inquiry_entry *e)
869 {
870 	return jiffies - e->timestamp;
871 }
872 
873 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
874 					       bdaddr_t *bdaddr);
875 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
876 						       bdaddr_t *bdaddr);
877 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
878 						       bdaddr_t *bdaddr,
879 						       int state);
880 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
881 				      struct inquiry_entry *ie);
882 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
883 			     bool name_known);
884 void hci_inquiry_cache_flush(struct hci_dev *hdev);
885 
886 /* ----- HCI Connections ----- */
887 enum {
888 	HCI_CONN_AUTH_PEND,
889 	HCI_CONN_REAUTH_PEND,
890 	HCI_CONN_ENCRYPT_PEND,
891 	HCI_CONN_RSWITCH_PEND,
892 	HCI_CONN_MODE_CHANGE_PEND,
893 	HCI_CONN_SCO_SETUP_PEND,
894 	HCI_CONN_MGMT_CONNECTED,
895 	HCI_CONN_SSP_ENABLED,
896 	HCI_CONN_SC_ENABLED,
897 	HCI_CONN_AES_CCM,
898 	HCI_CONN_POWER_SAVE,
899 	HCI_CONN_FLUSH_KEY,
900 	HCI_CONN_ENCRYPT,
901 	HCI_CONN_AUTH,
902 	HCI_CONN_SECURE,
903 	HCI_CONN_FIPS,
904 	HCI_CONN_STK_ENCRYPT,
905 	HCI_CONN_AUTH_INITIATOR,
906 	HCI_CONN_DROP,
907 	HCI_CONN_PARAM_REMOVAL_PEND,
908 	HCI_CONN_NEW_LINK_KEY,
909 	HCI_CONN_SCANNING,
910 	HCI_CONN_AUTH_FAILURE,
911 };
912 
hci_conn_ssp_enabled(struct hci_conn * conn)913 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
914 {
915 	struct hci_dev *hdev = conn->hdev;
916 	return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
917 	       test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
918 }
919 
hci_conn_sc_enabled(struct hci_conn * conn)920 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
921 {
922 	struct hci_dev *hdev = conn->hdev;
923 	return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
924 	       test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
925 }
926 
hci_conn_hash_add(struct hci_dev * hdev,struct hci_conn * c)927 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
928 {
929 	struct hci_conn_hash *h = &hdev->conn_hash;
930 	list_add_rcu(&c->list, &h->list);
931 	switch (c->type) {
932 	case ACL_LINK:
933 		h->acl_num++;
934 		break;
935 	case AMP_LINK:
936 		h->amp_num++;
937 		break;
938 	case LE_LINK:
939 		h->le_num++;
940 		if (c->role == HCI_ROLE_SLAVE)
941 			h->le_num_peripheral++;
942 		break;
943 	case SCO_LINK:
944 	case ESCO_LINK:
945 		h->sco_num++;
946 		break;
947 	}
948 }
949 
hci_conn_hash_del(struct hci_dev * hdev,struct hci_conn * c)950 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
951 {
952 	struct hci_conn_hash *h = &hdev->conn_hash;
953 
954 	list_del_rcu(&c->list);
955 	synchronize_rcu();
956 
957 	switch (c->type) {
958 	case ACL_LINK:
959 		h->acl_num--;
960 		break;
961 	case AMP_LINK:
962 		h->amp_num--;
963 		break;
964 	case LE_LINK:
965 		h->le_num--;
966 		if (c->role == HCI_ROLE_SLAVE)
967 			h->le_num_peripheral--;
968 		break;
969 	case SCO_LINK:
970 	case ESCO_LINK:
971 		h->sco_num--;
972 		break;
973 	}
974 }
975 
hci_conn_num(struct hci_dev * hdev,__u8 type)976 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
977 {
978 	struct hci_conn_hash *h = &hdev->conn_hash;
979 	switch (type) {
980 	case ACL_LINK:
981 		return h->acl_num;
982 	case AMP_LINK:
983 		return h->amp_num;
984 	case LE_LINK:
985 		return h->le_num;
986 	case SCO_LINK:
987 	case ESCO_LINK:
988 		return h->sco_num;
989 	default:
990 		return 0;
991 	}
992 }
993 
hci_conn_count(struct hci_dev * hdev)994 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
995 {
996 	struct hci_conn_hash *c = &hdev->conn_hash;
997 
998 	return c->acl_num + c->amp_num + c->sco_num + c->le_num;
999 }
1000 
hci_conn_lookup_type(struct hci_dev * hdev,__u16 handle)1001 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
1002 {
1003 	struct hci_conn_hash *h = &hdev->conn_hash;
1004 	struct hci_conn *c;
1005 	__u8 type = INVALID_LINK;
1006 
1007 	rcu_read_lock();
1008 
1009 	list_for_each_entry_rcu(c, &h->list, list) {
1010 		if (c->handle == handle) {
1011 			type = c->type;
1012 			break;
1013 		}
1014 	}
1015 
1016 	rcu_read_unlock();
1017 
1018 	return type;
1019 }
1020 
hci_conn_hash_lookup_handle(struct hci_dev * hdev,__u16 handle)1021 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
1022 								__u16 handle)
1023 {
1024 	struct hci_conn_hash *h = &hdev->conn_hash;
1025 	struct hci_conn  *c;
1026 
1027 	rcu_read_lock();
1028 
1029 	list_for_each_entry_rcu(c, &h->list, list) {
1030 		if (c->handle == handle) {
1031 			rcu_read_unlock();
1032 			return c;
1033 		}
1034 	}
1035 	rcu_read_unlock();
1036 
1037 	return NULL;
1038 }
1039 
hci_conn_hash_lookup_ba(struct hci_dev * hdev,__u8 type,bdaddr_t * ba)1040 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
1041 							__u8 type, bdaddr_t *ba)
1042 {
1043 	struct hci_conn_hash *h = &hdev->conn_hash;
1044 	struct hci_conn  *c;
1045 
1046 	rcu_read_lock();
1047 
1048 	list_for_each_entry_rcu(c, &h->list, list) {
1049 		if (c->type == type && !bacmp(&c->dst, ba)) {
1050 			rcu_read_unlock();
1051 			return c;
1052 		}
1053 	}
1054 
1055 	rcu_read_unlock();
1056 
1057 	return NULL;
1058 }
1059 
hci_conn_hash_lookup_le(struct hci_dev * hdev,bdaddr_t * ba,__u8 ba_type)1060 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
1061 						       bdaddr_t *ba,
1062 						       __u8 ba_type)
1063 {
1064 	struct hci_conn_hash *h = &hdev->conn_hash;
1065 	struct hci_conn  *c;
1066 
1067 	rcu_read_lock();
1068 
1069 	list_for_each_entry_rcu(c, &h->list, list) {
1070 		if (c->type != LE_LINK)
1071 		       continue;
1072 
1073 		if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
1074 			rcu_read_unlock();
1075 			return c;
1076 		}
1077 	}
1078 
1079 	rcu_read_unlock();
1080 
1081 	return NULL;
1082 }
1083 
hci_conn_hash_lookup_state(struct hci_dev * hdev,__u8 type,__u16 state)1084 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
1085 							__u8 type, __u16 state)
1086 {
1087 	struct hci_conn_hash *h = &hdev->conn_hash;
1088 	struct hci_conn  *c;
1089 
1090 	rcu_read_lock();
1091 
1092 	list_for_each_entry_rcu(c, &h->list, list) {
1093 		if (c->type == type && c->state == state) {
1094 			rcu_read_unlock();
1095 			return c;
1096 		}
1097 	}
1098 
1099 	rcu_read_unlock();
1100 
1101 	return NULL;
1102 }
1103 
hci_lookup_le_connect(struct hci_dev * hdev)1104 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
1105 {
1106 	struct hci_conn_hash *h = &hdev->conn_hash;
1107 	struct hci_conn  *c;
1108 
1109 	rcu_read_lock();
1110 
1111 	list_for_each_entry_rcu(c, &h->list, list) {
1112 		if (c->type == LE_LINK && c->state == BT_CONNECT &&
1113 		    !test_bit(HCI_CONN_SCANNING, &c->flags)) {
1114 			rcu_read_unlock();
1115 			return c;
1116 		}
1117 	}
1118 
1119 	rcu_read_unlock();
1120 
1121 	return NULL;
1122 }
1123 
1124 int hci_disconnect(struct hci_conn *conn, __u8 reason);
1125 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
1126 void hci_sco_setup(struct hci_conn *conn, __u8 status);
1127 
1128 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
1129 			      u8 role);
1130 int hci_conn_del(struct hci_conn *conn);
1131 void hci_conn_hash_flush(struct hci_dev *hdev);
1132 void hci_conn_check_pending(struct hci_dev *hdev);
1133 
1134 struct hci_chan *hci_chan_create(struct hci_conn *conn);
1135 void hci_chan_del(struct hci_chan *chan);
1136 void hci_chan_list_flush(struct hci_conn *conn);
1137 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
1138 
1139 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1140 				     u8 dst_type, u8 sec_level,
1141 				     u16 conn_timeout,
1142 				     enum conn_reasons conn_reason);
1143 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
1144 				u8 dst_type, bool dst_resolved, u8 sec_level,
1145 				u16 conn_timeout, u8 role);
1146 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1147 				 u8 sec_level, u8 auth_type,
1148 				 enum conn_reasons conn_reason);
1149 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1150 				 __u16 setting, struct bt_codec *codec);
1151 int hci_conn_check_link_mode(struct hci_conn *conn);
1152 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
1153 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
1154 		      bool initiator);
1155 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
1156 
1157 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
1158 
1159 void hci_conn_failed(struct hci_conn *conn, u8 status);
1160 
1161 /*
1162  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
1163  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
1164  * working or anything else. They just guarantee that the object is available
1165  * and can be dereferenced. So you can use its locks, local variables and any
1166  * other constant data.
1167  * Before accessing runtime data, you _must_ lock the object and then check that
1168  * it is still running. As soon as you release the locks, the connection might
1169  * get dropped, though.
1170  *
1171  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
1172  * how long the underlying connection is held. So every channel that runs on the
1173  * hci_conn object calls this to prevent the connection from disappearing. As
1174  * long as you hold a device, you must also guarantee that you have a valid
1175  * reference to the device via hci_conn_get() (or the initial reference from
1176  * hci_conn_add()).
1177  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
1178  * break because nobody cares for that. But this means, we cannot use
1179  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
1180  */
1181 
hci_conn_get(struct hci_conn * conn)1182 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
1183 {
1184 	get_device(&conn->dev);
1185 	return conn;
1186 }
1187 
hci_conn_put(struct hci_conn * conn)1188 static inline void hci_conn_put(struct hci_conn *conn)
1189 {
1190 	put_device(&conn->dev);
1191 }
1192 
hci_conn_hold(struct hci_conn * conn)1193 static inline void hci_conn_hold(struct hci_conn *conn)
1194 {
1195 	BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1196 
1197 	atomic_inc(&conn->refcnt);
1198 	cancel_delayed_work(&conn->disc_work);
1199 }
1200 
hci_conn_drop(struct hci_conn * conn)1201 static inline void hci_conn_drop(struct hci_conn *conn)
1202 {
1203 	BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1204 
1205 	if (atomic_dec_and_test(&conn->refcnt)) {
1206 		unsigned long timeo;
1207 
1208 		switch (conn->type) {
1209 		case ACL_LINK:
1210 		case LE_LINK:
1211 			cancel_delayed_work(&conn->idle_work);
1212 			if (conn->state == BT_CONNECTED) {
1213 				timeo = conn->disc_timeout;
1214 				if (!conn->out)
1215 					timeo *= 2;
1216 			} else {
1217 				timeo = 0;
1218 			}
1219 			break;
1220 
1221 		case AMP_LINK:
1222 			timeo = conn->disc_timeout;
1223 			break;
1224 
1225 		default:
1226 			timeo = 0;
1227 			break;
1228 		}
1229 
1230 		cancel_delayed_work(&conn->disc_work);
1231 		queue_delayed_work(conn->hdev->workqueue,
1232 				   &conn->disc_work, timeo);
1233 	}
1234 }
1235 
1236 /* ----- HCI Devices ----- */
hci_dev_put(struct hci_dev * d)1237 static inline void hci_dev_put(struct hci_dev *d)
1238 {
1239 	BT_DBG("%s orig refcnt %d", d->name,
1240 	       kref_read(&d->dev.kobj.kref));
1241 
1242 	put_device(&d->dev);
1243 }
1244 
hci_dev_hold(struct hci_dev * d)1245 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
1246 {
1247 	BT_DBG("%s orig refcnt %d", d->name,
1248 	       kref_read(&d->dev.kobj.kref));
1249 
1250 	get_device(&d->dev);
1251 	return d;
1252 }
1253 
1254 #define hci_dev_lock(d)		mutex_lock(&d->lock)
1255 #define hci_dev_unlock(d)	mutex_unlock(&d->lock)
1256 
1257 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1258 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1259 
hci_get_drvdata(struct hci_dev * hdev)1260 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1261 {
1262 	return dev_get_drvdata(&hdev->dev);
1263 }
1264 
hci_set_drvdata(struct hci_dev * hdev,void * data)1265 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1266 {
1267 	dev_set_drvdata(&hdev->dev, data);
1268 }
1269 
hci_get_priv(struct hci_dev * hdev)1270 static inline void *hci_get_priv(struct hci_dev *hdev)
1271 {
1272 	return (char *)hdev + sizeof(*hdev);
1273 }
1274 
1275 struct hci_dev *hci_dev_get(int index);
1276 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1277 
1278 struct hci_dev *hci_alloc_dev_priv(int sizeof_priv);
1279 
hci_alloc_dev(void)1280 static inline struct hci_dev *hci_alloc_dev(void)
1281 {
1282 	return hci_alloc_dev_priv(0);
1283 }
1284 
1285 void hci_free_dev(struct hci_dev *hdev);
1286 int hci_register_dev(struct hci_dev *hdev);
1287 void hci_unregister_dev(struct hci_dev *hdev);
1288 void hci_release_dev(struct hci_dev *hdev);
1289 int hci_suspend_dev(struct hci_dev *hdev);
1290 int hci_resume_dev(struct hci_dev *hdev);
1291 int hci_reset_dev(struct hci_dev *hdev);
1292 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1293 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1294 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1295 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1296 
hci_set_msft_opcode(struct hci_dev * hdev,__u16 opcode)1297 static inline void hci_set_msft_opcode(struct hci_dev *hdev, __u16 opcode)
1298 {
1299 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
1300 	hdev->msft_opcode = opcode;
1301 #endif
1302 }
1303 
hci_set_aosp_capable(struct hci_dev * hdev)1304 static inline void hci_set_aosp_capable(struct hci_dev *hdev)
1305 {
1306 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
1307 	hdev->aosp_capable = true;
1308 #endif
1309 }
1310 
1311 int hci_dev_open(__u16 dev);
1312 int hci_dev_close(__u16 dev);
1313 int hci_dev_do_close(struct hci_dev *hdev);
1314 int hci_dev_reset(__u16 dev);
1315 int hci_dev_reset_stat(__u16 dev);
1316 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1317 int hci_get_dev_list(void __user *arg);
1318 int hci_get_dev_info(void __user *arg);
1319 int hci_get_conn_list(void __user *arg);
1320 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1321 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1322 int hci_inquiry(void __user *arg);
1323 
1324 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1325 					   bdaddr_t *bdaddr, u8 type);
1326 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
1327 				    struct list_head *list, bdaddr_t *bdaddr,
1328 				    u8 type);
1329 struct bdaddr_list_with_flags *
1330 hci_bdaddr_list_lookup_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1331 				  u8 type);
1332 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1333 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1334 				 u8 type, u8 *peer_irk, u8 *local_irk);
1335 int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1336 				   u8 type, u32 flags);
1337 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1338 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1339 				 u8 type);
1340 int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1341 				   u8 type);
1342 void hci_bdaddr_list_clear(struct list_head *list);
1343 
1344 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1345 					       bdaddr_t *addr, u8 addr_type);
1346 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1347 					    bdaddr_t *addr, u8 addr_type);
1348 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1349 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1350 
1351 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1352 						  bdaddr_t *addr,
1353 						  u8 addr_type);
1354 
1355 void hci_uuids_clear(struct hci_dev *hdev);
1356 
1357 void hci_link_keys_clear(struct hci_dev *hdev);
1358 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1359 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1360 				  bdaddr_t *bdaddr, u8 *val, u8 type,
1361 				  u8 pin_len, bool *persistent);
1362 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1363 			    u8 addr_type, u8 type, u8 authenticated,
1364 			    u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1365 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1366 			     u8 addr_type, u8 role);
1367 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1368 void hci_smp_ltks_clear(struct hci_dev *hdev);
1369 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1370 
1371 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1372 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1373 				     u8 addr_type);
1374 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1375 			    u8 addr_type, u8 val[16], bdaddr_t *rpa);
1376 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1377 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16]);
1378 void hci_blocked_keys_clear(struct hci_dev *hdev);
1379 void hci_smp_irks_clear(struct hci_dev *hdev);
1380 
1381 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1382 
1383 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1384 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1385 					  bdaddr_t *bdaddr, u8 bdaddr_type);
1386 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1387 			    u8 bdaddr_type, u8 *hash192, u8 *rand192,
1388 			    u8 *hash256, u8 *rand256);
1389 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1390 			       u8 bdaddr_type);
1391 
1392 void hci_adv_instances_clear(struct hci_dev *hdev);
1393 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1394 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1395 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
1396 			 u16 adv_data_len, u8 *adv_data,
1397 			 u16 scan_rsp_len, u8 *scan_rsp_data,
1398 			 u16 timeout, u16 duration, s8 tx_power,
1399 			 u32 min_interval, u32 max_interval);
1400 int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1401 			 u16 adv_data_len, u8 *adv_data,
1402 			 u16 scan_rsp_len, u8 *scan_rsp_data);
1403 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1404 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired);
1405 u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance);
1406 bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance);
1407 
1408 void hci_adv_monitors_clear(struct hci_dev *hdev);
1409 void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1410 int hci_add_adv_patterns_monitor_complete(struct hci_dev *hdev, u8 status);
1411 int hci_remove_adv_monitor_complete(struct hci_dev *hdev, u8 status);
1412 bool hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor,
1413 			int *err);
1414 bool hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle, int *err);
1415 bool hci_remove_all_adv_monitor(struct hci_dev *hdev, int *err);
1416 bool hci_is_adv_monitoring(struct hci_dev *hdev);
1417 int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev);
1418 
1419 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1420 
1421 void hci_init_sysfs(struct hci_dev *hdev);
1422 void hci_conn_init_sysfs(struct hci_conn *conn);
1423 void hci_conn_add_sysfs(struct hci_conn *conn);
1424 void hci_conn_del_sysfs(struct hci_conn *conn);
1425 
1426 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1427 
1428 /* ----- LMP capabilities ----- */
1429 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1430 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1431 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1432 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1433 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1434 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1435 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1436 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1437 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1438 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1439 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1440 #define lmp_esco_2m_capable(dev)   ((dev)->features[0][5] & LMP_EDR_ESCO_2M)
1441 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1442 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1443 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1444 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1445 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1446 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1447 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1448 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1449 #define lmp_edr_2m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_2M)
1450 #define lmp_edr_3m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_3M)
1451 #define lmp_edr_3slot_capable(dev) ((dev)->features[0][4] & LMP_EDR_3SLOT)
1452 #define lmp_edr_5slot_capable(dev) ((dev)->features[0][5] & LMP_EDR_5SLOT)
1453 
1454 /* ----- Extended LMP capabilities ----- */
1455 #define lmp_cpb_central_capable(dev) ((dev)->features[2][0] & LMP_CPB_CENTRAL)
1456 #define lmp_cpb_peripheral_capable(dev) ((dev)->features[2][0] & LMP_CPB_PERIPHERAL)
1457 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1458 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1459 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1460 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1461 
1462 /* ----- Host capabilities ----- */
1463 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1464 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1465 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1466 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1467 
1468 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1469 				!hci_dev_test_flag(dev, HCI_AUTO_OFF))
1470 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1471 				hci_dev_test_flag(dev, HCI_SC_ENABLED))
1472 #define rpa_valid(dev)         (bacmp(&dev->rpa, BDADDR_ANY) && \
1473 				!hci_dev_test_flag(dev, HCI_RPA_EXPIRED))
1474 #define adv_rpa_valid(adv)     (bacmp(&adv->random_addr, BDADDR_ANY) && \
1475 				!adv->rpa_expired)
1476 
1477 #define scan_1m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_1M) || \
1478 		      ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_1M))
1479 
1480 #define scan_2m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_2M) || \
1481 		      ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_2M))
1482 
1483 #define scan_coded(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_CODED) || \
1484 			 ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_CODED))
1485 
1486 #define ll_privacy_capable(dev) ((dev)->le_features[0] & HCI_LE_LL_PRIVACY)
1487 
1488 /* Use LL Privacy based address resolution if supported */
1489 #define use_ll_privacy(dev) (ll_privacy_capable(dev) && \
1490 			     hci_dev_test_flag(dev, HCI_ENABLE_LL_PRIVACY))
1491 
1492 #define privacy_mode_capable(dev) (use_ll_privacy(dev) && \
1493 				   (hdev->commands[39] & 0x04))
1494 
1495 /* Use enhanced synchronous connection if command is supported and its quirk
1496  * has not been set.
1497  */
1498 #define enhanced_sync_conn_capable(dev) \
1499 	(((dev)->commands[29] & 0x08) && \
1500 	 !test_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &(dev)->quirks))
1501 
1502 /* Use ext scanning if set ext scan param and ext scan enable is supported */
1503 #define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \
1504 			   ((dev)->commands[37] & 0x40))
1505 /* Use ext create connection if command is supported */
1506 #define use_ext_conn(dev) ((dev)->commands[37] & 0x80)
1507 
1508 /* Extended advertising support */
1509 #define ext_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_EXT_ADV))
1510 
1511 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 1789:
1512  *
1513  * C24: Mandatory if the LE Controller supports Connection State and either
1514  * LE Feature (LL Privacy) or LE Feature (Extended Advertising) is supported
1515  */
1516 #define use_enhanced_conn_complete(dev) (ll_privacy_capable(dev) || \
1517 					 ext_adv_capable(dev))
1518 
1519 /* ----- HCI protocols ----- */
1520 #define HCI_PROTO_DEFER             0x01
1521 
hci_proto_connect_ind(struct hci_dev * hdev,bdaddr_t * bdaddr,__u8 type,__u8 * flags)1522 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1523 					__u8 type, __u8 *flags)
1524 {
1525 	switch (type) {
1526 	case ACL_LINK:
1527 		return l2cap_connect_ind(hdev, bdaddr);
1528 
1529 	case SCO_LINK:
1530 	case ESCO_LINK:
1531 		return sco_connect_ind(hdev, bdaddr, flags);
1532 
1533 	default:
1534 		BT_ERR("unknown link type %d", type);
1535 		return -EINVAL;
1536 	}
1537 }
1538 
hci_proto_disconn_ind(struct hci_conn * conn)1539 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1540 {
1541 	if (conn->type != ACL_LINK && conn->type != LE_LINK)
1542 		return HCI_ERROR_REMOTE_USER_TERM;
1543 
1544 	return l2cap_disconn_ind(conn);
1545 }
1546 
1547 /* ----- HCI callbacks ----- */
1548 struct hci_cb {
1549 	struct list_head list;
1550 
1551 	char *name;
1552 
1553 	void (*connect_cfm)	(struct hci_conn *conn, __u8 status);
1554 	void (*disconn_cfm)	(struct hci_conn *conn, __u8 status);
1555 	void (*security_cfm)	(struct hci_conn *conn, __u8 status,
1556 								__u8 encrypt);
1557 	void (*key_change_cfm)	(struct hci_conn *conn, __u8 status);
1558 	void (*role_switch_cfm)	(struct hci_conn *conn, __u8 status, __u8 role);
1559 };
1560 
hci_connect_cfm(struct hci_conn * conn,__u8 status)1561 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1562 {
1563 	struct hci_cb *cb;
1564 
1565 	mutex_lock(&hci_cb_list_lock);
1566 	list_for_each_entry(cb, &hci_cb_list, list) {
1567 		if (cb->connect_cfm)
1568 			cb->connect_cfm(conn, status);
1569 	}
1570 	mutex_unlock(&hci_cb_list_lock);
1571 
1572 	if (conn->connect_cfm_cb)
1573 		conn->connect_cfm_cb(conn, status);
1574 }
1575 
hci_disconn_cfm(struct hci_conn * conn,__u8 reason)1576 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1577 {
1578 	struct hci_cb *cb;
1579 
1580 	mutex_lock(&hci_cb_list_lock);
1581 	list_for_each_entry(cb, &hci_cb_list, list) {
1582 		if (cb->disconn_cfm)
1583 			cb->disconn_cfm(conn, reason);
1584 	}
1585 	mutex_unlock(&hci_cb_list_lock);
1586 
1587 	if (conn->disconn_cfm_cb)
1588 		conn->disconn_cfm_cb(conn, reason);
1589 }
1590 
hci_auth_cfm(struct hci_conn * conn,__u8 status)1591 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1592 {
1593 	struct hci_cb *cb;
1594 	__u8 encrypt;
1595 
1596 	if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1597 		return;
1598 
1599 	encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1600 
1601 	mutex_lock(&hci_cb_list_lock);
1602 	list_for_each_entry(cb, &hci_cb_list, list) {
1603 		if (cb->security_cfm)
1604 			cb->security_cfm(conn, status, encrypt);
1605 	}
1606 	mutex_unlock(&hci_cb_list_lock);
1607 
1608 	if (conn->security_cfm_cb)
1609 		conn->security_cfm_cb(conn, status);
1610 }
1611 
hci_encrypt_cfm(struct hci_conn * conn,__u8 status)1612 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status)
1613 {
1614 	struct hci_cb *cb;
1615 	__u8 encrypt;
1616 
1617 	if (conn->state == BT_CONFIG) {
1618 		if (!status)
1619 			conn->state = BT_CONNECTED;
1620 
1621 		hci_connect_cfm(conn, status);
1622 		hci_conn_drop(conn);
1623 		return;
1624 	}
1625 
1626 	if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1627 		encrypt = 0x00;
1628 	else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
1629 		encrypt = 0x02;
1630 	else
1631 		encrypt = 0x01;
1632 
1633 	if (!status) {
1634 		if (conn->sec_level == BT_SECURITY_SDP)
1635 			conn->sec_level = BT_SECURITY_LOW;
1636 
1637 		if (conn->pending_sec_level > conn->sec_level)
1638 			conn->sec_level = conn->pending_sec_level;
1639 	}
1640 
1641 	mutex_lock(&hci_cb_list_lock);
1642 	list_for_each_entry(cb, &hci_cb_list, list) {
1643 		if (cb->security_cfm)
1644 			cb->security_cfm(conn, status, encrypt);
1645 	}
1646 	mutex_unlock(&hci_cb_list_lock);
1647 
1648 	if (conn->security_cfm_cb)
1649 		conn->security_cfm_cb(conn, status);
1650 }
1651 
hci_key_change_cfm(struct hci_conn * conn,__u8 status)1652 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1653 {
1654 	struct hci_cb *cb;
1655 
1656 	mutex_lock(&hci_cb_list_lock);
1657 	list_for_each_entry(cb, &hci_cb_list, list) {
1658 		if (cb->key_change_cfm)
1659 			cb->key_change_cfm(conn, status);
1660 	}
1661 	mutex_unlock(&hci_cb_list_lock);
1662 }
1663 
hci_role_switch_cfm(struct hci_conn * conn,__u8 status,__u8 role)1664 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1665 								__u8 role)
1666 {
1667 	struct hci_cb *cb;
1668 
1669 	mutex_lock(&hci_cb_list_lock);
1670 	list_for_each_entry(cb, &hci_cb_list, list) {
1671 		if (cb->role_switch_cfm)
1672 			cb->role_switch_cfm(conn, status, role);
1673 	}
1674 	mutex_unlock(&hci_cb_list_lock);
1675 }
1676 
hci_bdaddr_is_rpa(bdaddr_t * bdaddr,u8 addr_type)1677 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1678 {
1679 	if (addr_type != ADDR_LE_DEV_RANDOM)
1680 		return false;
1681 
1682 	if ((bdaddr->b[5] & 0xc0) == 0x40)
1683 	       return true;
1684 
1685 	return false;
1686 }
1687 
hci_is_identity_address(bdaddr_t * addr,u8 addr_type)1688 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1689 {
1690 	if (addr_type == ADDR_LE_DEV_PUBLIC)
1691 		return true;
1692 
1693 	/* Check for Random Static address type */
1694 	if ((addr->b[5] & 0xc0) == 0xc0)
1695 		return true;
1696 
1697 	return false;
1698 }
1699 
hci_get_irk(struct hci_dev * hdev,bdaddr_t * bdaddr,u8 addr_type)1700 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1701 					  bdaddr_t *bdaddr, u8 addr_type)
1702 {
1703 	if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1704 		return NULL;
1705 
1706 	return hci_find_irk_by_rpa(hdev, bdaddr);
1707 }
1708 
hci_check_conn_params(u16 min,u16 max,u16 latency,u16 to_multiplier)1709 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1710 					u16 to_multiplier)
1711 {
1712 	u16 max_latency;
1713 
1714 	if (min > max || min < 6 || max > 3200)
1715 		return -EINVAL;
1716 
1717 	if (to_multiplier < 10 || to_multiplier > 3200)
1718 		return -EINVAL;
1719 
1720 	if (max >= to_multiplier * 8)
1721 		return -EINVAL;
1722 
1723 	max_latency = (to_multiplier * 4 / max) - 1;
1724 	if (latency > 499 || latency > max_latency)
1725 		return -EINVAL;
1726 
1727 	return 0;
1728 }
1729 
1730 int hci_register_cb(struct hci_cb *hcb);
1731 int hci_unregister_cb(struct hci_cb *hcb);
1732 
1733 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
1734 		   const void *param);
1735 
1736 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1737 		 const void *param);
1738 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1739 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1740 
1741 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1742 
1743 u32 hci_conn_get_phy(struct hci_conn *conn);
1744 
1745 /* ----- HCI Sockets ----- */
1746 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1747 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1748 			 int flag, struct sock *skip_sk);
1749 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1750 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
1751 				 void *data, u16 data_len, ktime_t tstamp,
1752 				 int flag, struct sock *skip_sk);
1753 
1754 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1755 
1756 #define HCI_MGMT_VAR_LEN	BIT(0)
1757 #define HCI_MGMT_NO_HDEV	BIT(1)
1758 #define HCI_MGMT_UNTRUSTED	BIT(2)
1759 #define HCI_MGMT_UNCONFIGURED	BIT(3)
1760 #define HCI_MGMT_HDEV_OPTIONAL	BIT(4)
1761 
1762 struct hci_mgmt_handler {
1763 	int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1764 		     u16 data_len);
1765 	size_t data_len;
1766 	unsigned long flags;
1767 };
1768 
1769 struct hci_mgmt_chan {
1770 	struct list_head list;
1771 	unsigned short channel;
1772 	size_t handler_count;
1773 	const struct hci_mgmt_handler *handlers;
1774 	void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1775 };
1776 
1777 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1778 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1779 
1780 /* Management interface */
1781 #define DISCOV_TYPE_BREDR		(BIT(BDADDR_BREDR))
1782 #define DISCOV_TYPE_LE			(BIT(BDADDR_LE_PUBLIC) | \
1783 					 BIT(BDADDR_LE_RANDOM))
1784 #define DISCOV_TYPE_INTERLEAVED		(BIT(BDADDR_BREDR) | \
1785 					 BIT(BDADDR_LE_PUBLIC) | \
1786 					 BIT(BDADDR_LE_RANDOM))
1787 
1788 /* These LE scan and inquiry parameters were chosen according to LE General
1789  * Discovery Procedure specification.
1790  */
1791 #define DISCOV_LE_SCAN_WIN		0x12
1792 #define DISCOV_LE_SCAN_INT		0x12
1793 #define DISCOV_LE_TIMEOUT		10240	/* msec */
1794 #define DISCOV_INTERLEAVED_TIMEOUT	5120	/* msec */
1795 #define DISCOV_INTERLEAVED_INQUIRY_LEN	0x04
1796 #define DISCOV_BREDR_INQUIRY_LEN	0x08
1797 #define DISCOV_LE_RESTART_DELAY		msecs_to_jiffies(200)	/* msec */
1798 #define DISCOV_LE_FAST_ADV_INT_MIN	0x00A0	/* 100 msec */
1799 #define DISCOV_LE_FAST_ADV_INT_MAX	0x00F0	/* 150 msec */
1800 
1801 #define NAME_RESOLVE_DURATION		msecs_to_jiffies(10240)	/* 10.24 sec */
1802 
1803 void mgmt_fill_version_info(void *ver);
1804 int mgmt_new_settings(struct hci_dev *hdev);
1805 void mgmt_index_added(struct hci_dev *hdev);
1806 void mgmt_index_removed(struct hci_dev *hdev);
1807 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1808 void mgmt_power_on(struct hci_dev *hdev, int err);
1809 void __mgmt_power_off(struct hci_dev *hdev);
1810 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1811 		       bool persistent);
1812 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
1813 			   u8 *name, u8 name_len);
1814 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1815 			      u8 link_type, u8 addr_type, u8 reason,
1816 			      bool mgmt_connected);
1817 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1818 			    u8 link_type, u8 addr_type, u8 status);
1819 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1820 			 u8 addr_type, u8 status);
1821 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1822 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1823 				  u8 status);
1824 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1825 				      u8 status);
1826 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1827 			      u8 link_type, u8 addr_type, u32 value,
1828 			      u8 confirm_hint);
1829 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1830 				     u8 link_type, u8 addr_type, u8 status);
1831 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1832 					 u8 link_type, u8 addr_type, u8 status);
1833 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1834 			      u8 link_type, u8 addr_type);
1835 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1836 				     u8 link_type, u8 addr_type, u8 status);
1837 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1838 					 u8 link_type, u8 addr_type, u8 status);
1839 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1840 			     u8 link_type, u8 addr_type, u32 passkey,
1841 			     u8 entered);
1842 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
1843 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1844 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1845 				    u8 status);
1846 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1847 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
1848 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
1849 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1850 		       u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1851 		       u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1852 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1853 		      u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1854 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1855 void mgmt_suspending(struct hci_dev *hdev, u8 state);
1856 void mgmt_resuming(struct hci_dev *hdev, u8 reason, bdaddr_t *bdaddr,
1857 		   u8 addr_type);
1858 bool mgmt_powering_down(struct hci_dev *hdev);
1859 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1860 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
1861 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1862 		   bool persistent);
1863 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1864 			 u8 bdaddr_type, u8 store_hint, u16 min_interval,
1865 			 u16 max_interval, u16 latency, u16 timeout);
1866 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1867 bool mgmt_get_connectable(struct hci_dev *hdev);
1868 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
1869 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
1870 			    u8 instance);
1871 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
1872 			      u8 instance);
1873 void mgmt_adv_monitor_removed(struct hci_dev *hdev, u16 handle);
1874 int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip);
1875 int mgmt_add_adv_patterns_monitor_complete(struct hci_dev *hdev, u8 status);
1876 int mgmt_remove_adv_monitor_complete(struct hci_dev *hdev, u8 status);
1877 void mgmt_adv_monitor_device_lost(struct hci_dev *hdev, u16 handle,
1878 				  bdaddr_t *bdaddr, u8 addr_type);
1879 
1880 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1881 		      u16 to_multiplier);
1882 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1883 		      __u8 ltk[16], __u8 key_size);
1884 
1885 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1886 			       u8 *bdaddr_type);
1887 
1888 #define SCO_AIRMODE_MASK       0x0003
1889 #define SCO_AIRMODE_CVSD       0x0000
1890 #define SCO_AIRMODE_TRANSP     0x0003
1891 
1892 #define LOCAL_CODEC_ACL_MASK	BIT(0)
1893 #define LOCAL_CODEC_SCO_MASK	BIT(1)
1894 
1895 #define TRANSPORT_TYPE_MAX	0x04
1896 
1897 #endif /* __HCI_CORE_H */
1898