xref: /openbmc/linux/include/net/bluetooth/hci_core.h (revision a36954f5)
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/leds.h>
29 #include <linux/rculist.h>
30 
31 #include <net/bluetooth/hci.h>
32 #include <net/bluetooth/hci_sock.h>
33 
34 /* HCI priority */
35 #define HCI_PRIO_MAX	7
36 
37 /* HCI Core structures */
38 struct inquiry_data {
39 	bdaddr_t	bdaddr;
40 	__u8		pscan_rep_mode;
41 	__u8		pscan_period_mode;
42 	__u8		pscan_mode;
43 	__u8		dev_class[3];
44 	__le16		clock_offset;
45 	__s8		rssi;
46 	__u8		ssp_mode;
47 };
48 
49 struct inquiry_entry {
50 	struct list_head	all;		/* inq_cache.all */
51 	struct list_head	list;		/* unknown or resolve */
52 	enum {
53 		NAME_NOT_KNOWN,
54 		NAME_NEEDED,
55 		NAME_PENDING,
56 		NAME_KNOWN,
57 	} name_state;
58 	__u32			timestamp;
59 	struct inquiry_data	data;
60 };
61 
62 struct discovery_state {
63 	int			type;
64 	enum {
65 		DISCOVERY_STOPPED,
66 		DISCOVERY_STARTING,
67 		DISCOVERY_FINDING,
68 		DISCOVERY_RESOLVING,
69 		DISCOVERY_STOPPING,
70 	} state;
71 	struct list_head	all;	/* All devices found during inquiry */
72 	struct list_head	unknown;	/* Name state not known */
73 	struct list_head	resolve;	/* Name needs to be resolved */
74 	__u32			timestamp;
75 	bdaddr_t		last_adv_addr;
76 	u8			last_adv_addr_type;
77 	s8			last_adv_rssi;
78 	u32			last_adv_flags;
79 	u8			last_adv_data[HCI_MAX_AD_LENGTH];
80 	u8			last_adv_data_len;
81 	bool			report_invalid_rssi;
82 	bool			result_filtering;
83 	bool			limited;
84 	s8			rssi;
85 	u16			uuid_count;
86 	u8			(*uuids)[16];
87 	unsigned long		scan_start;
88 	unsigned long		scan_duration;
89 };
90 
91 struct hci_conn_hash {
92 	struct list_head list;
93 	unsigned int     acl_num;
94 	unsigned int     amp_num;
95 	unsigned int     sco_num;
96 	unsigned int     le_num;
97 	unsigned int     le_num_slave;
98 };
99 
100 struct bdaddr_list {
101 	struct list_head list;
102 	bdaddr_t bdaddr;
103 	u8 bdaddr_type;
104 };
105 
106 struct bt_uuid {
107 	struct list_head list;
108 	u8 uuid[16];
109 	u8 size;
110 	u8 svc_hint;
111 };
112 
113 struct smp_csrk {
114 	bdaddr_t bdaddr;
115 	u8 bdaddr_type;
116 	u8 type;
117 	u8 val[16];
118 };
119 
120 struct smp_ltk {
121 	struct list_head list;
122 	struct rcu_head rcu;
123 	bdaddr_t bdaddr;
124 	u8 bdaddr_type;
125 	u8 authenticated;
126 	u8 type;
127 	u8 enc_size;
128 	__le16 ediv;
129 	__le64 rand;
130 	u8 val[16];
131 };
132 
133 struct smp_irk {
134 	struct list_head list;
135 	struct rcu_head rcu;
136 	bdaddr_t rpa;
137 	bdaddr_t bdaddr;
138 	u8 addr_type;
139 	u8 val[16];
140 };
141 
142 struct link_key {
143 	struct list_head list;
144 	struct rcu_head rcu;
145 	bdaddr_t bdaddr;
146 	u8 type;
147 	u8 val[HCI_LINK_KEY_SIZE];
148 	u8 pin_len;
149 };
150 
151 struct oob_data {
152 	struct list_head list;
153 	bdaddr_t bdaddr;
154 	u8 bdaddr_type;
155 	u8 present;
156 	u8 hash192[16];
157 	u8 rand192[16];
158 	u8 hash256[16];
159 	u8 rand256[16];
160 };
161 
162 struct adv_info {
163 	struct list_head list;
164 	bool pending;
165 	__u8	instance;
166 	__u32	flags;
167 	__u16	timeout;
168 	__u16	remaining_time;
169 	__u16	duration;
170 	__u16	adv_data_len;
171 	__u8	adv_data[HCI_MAX_AD_LENGTH];
172 	__u16	scan_rsp_len;
173 	__u8	scan_rsp_data[HCI_MAX_AD_LENGTH];
174 };
175 
176 #define HCI_MAX_ADV_INSTANCES		5
177 #define HCI_DEFAULT_ADV_DURATION	2
178 
179 #define HCI_MAX_SHORT_NAME_LENGTH	10
180 
181 /* Default LE RPA expiry time, 15 minutes */
182 #define HCI_DEFAULT_RPA_TIMEOUT		(15 * 60)
183 
184 /* Default min/max age of connection information (1s/3s) */
185 #define DEFAULT_CONN_INFO_MIN_AGE	1000
186 #define DEFAULT_CONN_INFO_MAX_AGE	3000
187 
188 struct amp_assoc {
189 	__u16	len;
190 	__u16	offset;
191 	__u16	rem_len;
192 	__u16	len_so_far;
193 	__u8	data[HCI_MAX_AMP_ASSOC_SIZE];
194 };
195 
196 #define HCI_MAX_PAGES	3
197 
198 struct hci_dev {
199 	struct list_head list;
200 	struct mutex	lock;
201 
202 	char		name[8];
203 	unsigned long	flags;
204 	__u16		id;
205 	__u8		bus;
206 	__u8		dev_type;
207 	bdaddr_t	bdaddr;
208 	bdaddr_t	setup_addr;
209 	bdaddr_t	public_addr;
210 	bdaddr_t	random_addr;
211 	bdaddr_t	static_addr;
212 	__u8		adv_addr_type;
213 	__u8		dev_name[HCI_MAX_NAME_LENGTH];
214 	__u8		short_name[HCI_MAX_SHORT_NAME_LENGTH];
215 	__u8		eir[HCI_MAX_EIR_LENGTH];
216 	__u16		appearance;
217 	__u8		dev_class[3];
218 	__u8		major_class;
219 	__u8		minor_class;
220 	__u8		max_page;
221 	__u8		features[HCI_MAX_PAGES][8];
222 	__u8		le_features[8];
223 	__u8		le_white_list_size;
224 	__u8		le_states[8];
225 	__u8		commands[64];
226 	__u8		hci_ver;
227 	__u16		hci_rev;
228 	__u8		lmp_ver;
229 	__u16		manufacturer;
230 	__u16		lmp_subver;
231 	__u16		voice_setting;
232 	__u8		num_iac;
233 	__u8		stored_max_keys;
234 	__u8		stored_num_keys;
235 	__u8		io_capability;
236 	__s8		inq_tx_power;
237 	__u16		page_scan_interval;
238 	__u16		page_scan_window;
239 	__u8		page_scan_type;
240 	__u8		le_adv_channel_map;
241 	__u16		le_adv_min_interval;
242 	__u16		le_adv_max_interval;
243 	__u8		le_scan_type;
244 	__u16		le_scan_interval;
245 	__u16		le_scan_window;
246 	__u16		le_conn_min_interval;
247 	__u16		le_conn_max_interval;
248 	__u16		le_conn_latency;
249 	__u16		le_supv_timeout;
250 	__u16		le_def_tx_len;
251 	__u16		le_def_tx_time;
252 	__u16		le_max_tx_len;
253 	__u16		le_max_tx_time;
254 	__u16		le_max_rx_len;
255 	__u16		le_max_rx_time;
256 	__u16		discov_interleaved_timeout;
257 	__u16		conn_info_min_age;
258 	__u16		conn_info_max_age;
259 	__u8		ssp_debug_mode;
260 	__u8		hw_error_code;
261 	__u32		clock;
262 
263 	__u16		devid_source;
264 	__u16		devid_vendor;
265 	__u16		devid_product;
266 	__u16		devid_version;
267 
268 	__u16		pkt_type;
269 	__u16		esco_type;
270 	__u16		link_policy;
271 	__u16		link_mode;
272 
273 	__u32		idle_timeout;
274 	__u16		sniff_min_interval;
275 	__u16		sniff_max_interval;
276 
277 	__u8		amp_status;
278 	__u32		amp_total_bw;
279 	__u32		amp_max_bw;
280 	__u32		amp_min_latency;
281 	__u32		amp_max_pdu;
282 	__u8		amp_type;
283 	__u16		amp_pal_cap;
284 	__u16		amp_assoc_size;
285 	__u32		amp_max_flush_to;
286 	__u32		amp_be_flush_to;
287 
288 	struct amp_assoc	loc_assoc;
289 
290 	__u8		flow_ctl_mode;
291 
292 	unsigned int	auto_accept_delay;
293 
294 	unsigned long	quirks;
295 
296 	atomic_t	cmd_cnt;
297 	unsigned int	acl_cnt;
298 	unsigned int	sco_cnt;
299 	unsigned int	le_cnt;
300 
301 	unsigned int	acl_mtu;
302 	unsigned int	sco_mtu;
303 	unsigned int	le_mtu;
304 	unsigned int	acl_pkts;
305 	unsigned int	sco_pkts;
306 	unsigned int	le_pkts;
307 
308 	__u16		block_len;
309 	__u16		block_mtu;
310 	__u16		num_blocks;
311 	__u16		block_cnt;
312 
313 	unsigned long	acl_last_tx;
314 	unsigned long	sco_last_tx;
315 	unsigned long	le_last_tx;
316 
317 	struct workqueue_struct	*workqueue;
318 	struct workqueue_struct	*req_workqueue;
319 
320 	struct work_struct	power_on;
321 	struct delayed_work	power_off;
322 	struct work_struct	error_reset;
323 
324 	__u16			discov_timeout;
325 	struct delayed_work	discov_off;
326 
327 	struct delayed_work	service_cache;
328 
329 	struct delayed_work	cmd_timer;
330 
331 	struct work_struct	rx_work;
332 	struct work_struct	cmd_work;
333 	struct work_struct	tx_work;
334 
335 	struct work_struct	discov_update;
336 	struct work_struct	bg_scan_update;
337 	struct work_struct	scan_update;
338 	struct work_struct	connectable_update;
339 	struct work_struct	discoverable_update;
340 	struct delayed_work	le_scan_disable;
341 	struct delayed_work	le_scan_restart;
342 
343 	struct sk_buff_head	rx_q;
344 	struct sk_buff_head	raw_q;
345 	struct sk_buff_head	cmd_q;
346 
347 	struct sk_buff		*sent_cmd;
348 
349 	struct mutex		req_lock;
350 	wait_queue_head_t	req_wait_q;
351 	__u32			req_status;
352 	__u32			req_result;
353 	struct sk_buff		*req_skb;
354 
355 	void			*smp_data;
356 	void			*smp_bredr_data;
357 
358 	struct discovery_state	discovery;
359 	struct hci_conn_hash	conn_hash;
360 
361 	struct list_head	mgmt_pending;
362 	struct list_head	blacklist;
363 	struct list_head	whitelist;
364 	struct list_head	uuids;
365 	struct list_head	link_keys;
366 	struct list_head	long_term_keys;
367 	struct list_head	identity_resolving_keys;
368 	struct list_head	remote_oob_data;
369 	struct list_head	le_white_list;
370 	struct list_head	le_conn_params;
371 	struct list_head	pend_le_conns;
372 	struct list_head	pend_le_reports;
373 
374 	struct hci_dev_stats	stat;
375 
376 	atomic_t		promisc;
377 
378 	const char		*hw_info;
379 	const char		*fw_info;
380 	struct dentry		*debugfs;
381 
382 	struct device		dev;
383 
384 	struct rfkill		*rfkill;
385 
386 	DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
387 
388 	__s8			adv_tx_power;
389 	__u8			adv_data[HCI_MAX_AD_LENGTH];
390 	__u8			adv_data_len;
391 	__u8			scan_rsp_data[HCI_MAX_AD_LENGTH];
392 	__u8			scan_rsp_data_len;
393 
394 	struct list_head	adv_instances;
395 	unsigned int		adv_instance_cnt;
396 	__u8			cur_adv_instance;
397 	__u16			adv_instance_timeout;
398 	struct delayed_work	adv_instance_expire;
399 
400 	__u8			irk[16];
401 	__u32			rpa_timeout;
402 	struct delayed_work	rpa_expired;
403 	bdaddr_t		rpa;
404 
405 #if IS_ENABLED(CONFIG_BT_LEDS)
406 	struct led_trigger	*power_led;
407 #endif
408 
409 	int (*open)(struct hci_dev *hdev);
410 	int (*close)(struct hci_dev *hdev);
411 	int (*flush)(struct hci_dev *hdev);
412 	int (*setup)(struct hci_dev *hdev);
413 	int (*shutdown)(struct hci_dev *hdev);
414 	int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
415 	void (*notify)(struct hci_dev *hdev, unsigned int evt);
416 	void (*hw_error)(struct hci_dev *hdev, u8 code);
417 	int (*post_init)(struct hci_dev *hdev);
418 	int (*set_diag)(struct hci_dev *hdev, bool enable);
419 	int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
420 };
421 
422 #define HCI_PHY_HANDLE(handle)	(handle & 0xff)
423 
424 struct hci_conn {
425 	struct list_head list;
426 
427 	atomic_t	refcnt;
428 
429 	bdaddr_t	dst;
430 	__u8		dst_type;
431 	bdaddr_t	src;
432 	__u8		src_type;
433 	bdaddr_t	init_addr;
434 	__u8		init_addr_type;
435 	bdaddr_t	resp_addr;
436 	__u8		resp_addr_type;
437 	__u16		handle;
438 	__u16		state;
439 	__u8		mode;
440 	__u8		type;
441 	__u8		role;
442 	bool		out;
443 	__u8		attempt;
444 	__u8		dev_class[3];
445 	__u8		features[HCI_MAX_PAGES][8];
446 	__u16		pkt_type;
447 	__u16		link_policy;
448 	__u8		key_type;
449 	__u8		auth_type;
450 	__u8		sec_level;
451 	__u8		pending_sec_level;
452 	__u8		pin_length;
453 	__u8		enc_key_size;
454 	__u8		io_capability;
455 	__u32		passkey_notify;
456 	__u8		passkey_entered;
457 	__u16		disc_timeout;
458 	__u16		conn_timeout;
459 	__u16		setting;
460 	__u16		le_conn_min_interval;
461 	__u16		le_conn_max_interval;
462 	__u16		le_conn_interval;
463 	__u16		le_conn_latency;
464 	__u16		le_supv_timeout;
465 	__u8		le_adv_data[HCI_MAX_AD_LENGTH];
466 	__u8		le_adv_data_len;
467 	__s8		rssi;
468 	__s8		tx_power;
469 	__s8		max_tx_power;
470 	unsigned long	flags;
471 
472 	__u32		clock;
473 	__u16		clock_accuracy;
474 
475 	unsigned long	conn_info_timestamp;
476 
477 	__u8		remote_cap;
478 	__u8		remote_auth;
479 	__u8		remote_id;
480 
481 	unsigned int	sent;
482 
483 	struct sk_buff_head data_q;
484 	struct list_head chan_list;
485 
486 	struct delayed_work disc_work;
487 	struct delayed_work auto_accept_work;
488 	struct delayed_work idle_work;
489 	struct delayed_work le_conn_timeout;
490 	struct work_struct  le_scan_cleanup;
491 
492 	struct device	dev;
493 	struct dentry	*debugfs;
494 
495 	struct hci_dev	*hdev;
496 	void		*l2cap_data;
497 	void		*sco_data;
498 	struct amp_mgr	*amp_mgr;
499 
500 	struct hci_conn	*link;
501 
502 	void (*connect_cfm_cb)	(struct hci_conn *conn, u8 status);
503 	void (*security_cfm_cb)	(struct hci_conn *conn, u8 status);
504 	void (*disconn_cfm_cb)	(struct hci_conn *conn, u8 reason);
505 };
506 
507 struct hci_chan {
508 	struct list_head list;
509 	__u16 handle;
510 	struct hci_conn *conn;
511 	struct sk_buff_head data_q;
512 	unsigned int	sent;
513 	__u8		state;
514 };
515 
516 struct hci_conn_params {
517 	struct list_head list;
518 	struct list_head action;
519 
520 	bdaddr_t addr;
521 	u8 addr_type;
522 
523 	u16 conn_min_interval;
524 	u16 conn_max_interval;
525 	u16 conn_latency;
526 	u16 supervision_timeout;
527 
528 	enum {
529 		HCI_AUTO_CONN_DISABLED,
530 		HCI_AUTO_CONN_REPORT,
531 		HCI_AUTO_CONN_DIRECT,
532 		HCI_AUTO_CONN_ALWAYS,
533 		HCI_AUTO_CONN_LINK_LOSS,
534 		HCI_AUTO_CONN_EXPLICIT,
535 	} auto_connect;
536 
537 	struct hci_conn *conn;
538 	bool explicit_connect;
539 };
540 
541 extern struct list_head hci_dev_list;
542 extern struct list_head hci_cb_list;
543 extern rwlock_t hci_dev_list_lock;
544 extern struct mutex hci_cb_list_lock;
545 
546 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
547 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
548 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
549 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
550 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
551 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
552 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
553 
554 #define hci_dev_clear_volatile_flags(hdev)			\
555 	do {							\
556 		hci_dev_clear_flag(hdev, HCI_LE_SCAN);		\
557 		hci_dev_clear_flag(hdev, HCI_LE_ADV);		\
558 		hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);	\
559 	} while (0)
560 
561 /* ----- HCI interface to upper protocols ----- */
562 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
563 int l2cap_disconn_ind(struct hci_conn *hcon);
564 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
565 
566 #if IS_ENABLED(CONFIG_BT_BREDR)
567 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
568 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
569 #else
570 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
571 				  __u8 *flags)
572 {
573 	return 0;
574 }
575 
576 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
577 {
578 }
579 #endif
580 
581 /* ----- Inquiry cache ----- */
582 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
583 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
584 
585 static inline void discovery_init(struct hci_dev *hdev)
586 {
587 	hdev->discovery.state = DISCOVERY_STOPPED;
588 	INIT_LIST_HEAD(&hdev->discovery.all);
589 	INIT_LIST_HEAD(&hdev->discovery.unknown);
590 	INIT_LIST_HEAD(&hdev->discovery.resolve);
591 	hdev->discovery.report_invalid_rssi = true;
592 	hdev->discovery.rssi = HCI_RSSI_INVALID;
593 }
594 
595 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
596 {
597 	hdev->discovery.result_filtering = false;
598 	hdev->discovery.report_invalid_rssi = true;
599 	hdev->discovery.rssi = HCI_RSSI_INVALID;
600 	hdev->discovery.uuid_count = 0;
601 	kfree(hdev->discovery.uuids);
602 	hdev->discovery.uuids = NULL;
603 	hdev->discovery.scan_start = 0;
604 	hdev->discovery.scan_duration = 0;
605 }
606 
607 bool hci_discovery_active(struct hci_dev *hdev);
608 
609 void hci_discovery_set_state(struct hci_dev *hdev, int state);
610 
611 static inline int inquiry_cache_empty(struct hci_dev *hdev)
612 {
613 	return list_empty(&hdev->discovery.all);
614 }
615 
616 static inline long inquiry_cache_age(struct hci_dev *hdev)
617 {
618 	struct discovery_state *c = &hdev->discovery;
619 	return jiffies - c->timestamp;
620 }
621 
622 static inline long inquiry_entry_age(struct inquiry_entry *e)
623 {
624 	return jiffies - e->timestamp;
625 }
626 
627 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
628 					       bdaddr_t *bdaddr);
629 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
630 						       bdaddr_t *bdaddr);
631 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
632 						       bdaddr_t *bdaddr,
633 						       int state);
634 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
635 				      struct inquiry_entry *ie);
636 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
637 			     bool name_known);
638 void hci_inquiry_cache_flush(struct hci_dev *hdev);
639 
640 /* ----- HCI Connections ----- */
641 enum {
642 	HCI_CONN_AUTH_PEND,
643 	HCI_CONN_REAUTH_PEND,
644 	HCI_CONN_ENCRYPT_PEND,
645 	HCI_CONN_RSWITCH_PEND,
646 	HCI_CONN_MODE_CHANGE_PEND,
647 	HCI_CONN_SCO_SETUP_PEND,
648 	HCI_CONN_MGMT_CONNECTED,
649 	HCI_CONN_SSP_ENABLED,
650 	HCI_CONN_SC_ENABLED,
651 	HCI_CONN_AES_CCM,
652 	HCI_CONN_POWER_SAVE,
653 	HCI_CONN_FLUSH_KEY,
654 	HCI_CONN_ENCRYPT,
655 	HCI_CONN_AUTH,
656 	HCI_CONN_SECURE,
657 	HCI_CONN_FIPS,
658 	HCI_CONN_STK_ENCRYPT,
659 	HCI_CONN_AUTH_INITIATOR,
660 	HCI_CONN_DROP,
661 	HCI_CONN_PARAM_REMOVAL_PEND,
662 	HCI_CONN_NEW_LINK_KEY,
663 	HCI_CONN_SCANNING,
664 	HCI_CONN_AUTH_FAILURE,
665 };
666 
667 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
668 {
669 	struct hci_dev *hdev = conn->hdev;
670 	return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
671 	       test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
672 }
673 
674 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
675 {
676 	struct hci_dev *hdev = conn->hdev;
677 	return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
678 	       test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
679 }
680 
681 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
682 {
683 	struct hci_conn_hash *h = &hdev->conn_hash;
684 	list_add_rcu(&c->list, &h->list);
685 	switch (c->type) {
686 	case ACL_LINK:
687 		h->acl_num++;
688 		break;
689 	case AMP_LINK:
690 		h->amp_num++;
691 		break;
692 	case LE_LINK:
693 		h->le_num++;
694 		if (c->role == HCI_ROLE_SLAVE)
695 			h->le_num_slave++;
696 		break;
697 	case SCO_LINK:
698 	case ESCO_LINK:
699 		h->sco_num++;
700 		break;
701 	}
702 }
703 
704 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
705 {
706 	struct hci_conn_hash *h = &hdev->conn_hash;
707 
708 	list_del_rcu(&c->list);
709 	synchronize_rcu();
710 
711 	switch (c->type) {
712 	case ACL_LINK:
713 		h->acl_num--;
714 		break;
715 	case AMP_LINK:
716 		h->amp_num--;
717 		break;
718 	case LE_LINK:
719 		h->le_num--;
720 		if (c->role == HCI_ROLE_SLAVE)
721 			h->le_num_slave--;
722 		break;
723 	case SCO_LINK:
724 	case ESCO_LINK:
725 		h->sco_num--;
726 		break;
727 	}
728 }
729 
730 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
731 {
732 	struct hci_conn_hash *h = &hdev->conn_hash;
733 	switch (type) {
734 	case ACL_LINK:
735 		return h->acl_num;
736 	case AMP_LINK:
737 		return h->amp_num;
738 	case LE_LINK:
739 		return h->le_num;
740 	case SCO_LINK:
741 	case ESCO_LINK:
742 		return h->sco_num;
743 	default:
744 		return 0;
745 	}
746 }
747 
748 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
749 {
750 	struct hci_conn_hash *c = &hdev->conn_hash;
751 
752 	return c->acl_num + c->amp_num + c->sco_num + c->le_num;
753 }
754 
755 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
756 {
757 	struct hci_conn_hash *h = &hdev->conn_hash;
758 	struct hci_conn *c;
759 	__u8 type = INVALID_LINK;
760 
761 	rcu_read_lock();
762 
763 	list_for_each_entry_rcu(c, &h->list, list) {
764 		if (c->handle == handle) {
765 			type = c->type;
766 			break;
767 		}
768 	}
769 
770 	rcu_read_unlock();
771 
772 	return type;
773 }
774 
775 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
776 								__u16 handle)
777 {
778 	struct hci_conn_hash *h = &hdev->conn_hash;
779 	struct hci_conn  *c;
780 
781 	rcu_read_lock();
782 
783 	list_for_each_entry_rcu(c, &h->list, list) {
784 		if (c->handle == handle) {
785 			rcu_read_unlock();
786 			return c;
787 		}
788 	}
789 	rcu_read_unlock();
790 
791 	return NULL;
792 }
793 
794 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
795 							__u8 type, bdaddr_t *ba)
796 {
797 	struct hci_conn_hash *h = &hdev->conn_hash;
798 	struct hci_conn  *c;
799 
800 	rcu_read_lock();
801 
802 	list_for_each_entry_rcu(c, &h->list, list) {
803 		if (c->type == type && !bacmp(&c->dst, ba)) {
804 			rcu_read_unlock();
805 			return c;
806 		}
807 	}
808 
809 	rcu_read_unlock();
810 
811 	return NULL;
812 }
813 
814 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
815 						       bdaddr_t *ba,
816 						       __u8 ba_type)
817 {
818 	struct hci_conn_hash *h = &hdev->conn_hash;
819 	struct hci_conn  *c;
820 
821 	rcu_read_lock();
822 
823 	list_for_each_entry_rcu(c, &h->list, list) {
824 		if (c->type != LE_LINK)
825 		       continue;
826 
827 		if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
828 			rcu_read_unlock();
829 			return c;
830 		}
831 	}
832 
833 	rcu_read_unlock();
834 
835 	return NULL;
836 }
837 
838 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
839 							__u8 type, __u16 state)
840 {
841 	struct hci_conn_hash *h = &hdev->conn_hash;
842 	struct hci_conn  *c;
843 
844 	rcu_read_lock();
845 
846 	list_for_each_entry_rcu(c, &h->list, list) {
847 		if (c->type == type && c->state == state) {
848 			rcu_read_unlock();
849 			return c;
850 		}
851 	}
852 
853 	rcu_read_unlock();
854 
855 	return NULL;
856 }
857 
858 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
859 {
860 	struct hci_conn_hash *h = &hdev->conn_hash;
861 	struct hci_conn  *c;
862 
863 	rcu_read_lock();
864 
865 	list_for_each_entry_rcu(c, &h->list, list) {
866 		if (c->type == LE_LINK && c->state == BT_CONNECT &&
867 		    !test_bit(HCI_CONN_SCANNING, &c->flags)) {
868 			rcu_read_unlock();
869 			return c;
870 		}
871 	}
872 
873 	rcu_read_unlock();
874 
875 	return NULL;
876 }
877 
878 int hci_disconnect(struct hci_conn *conn, __u8 reason);
879 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
880 void hci_sco_setup(struct hci_conn *conn, __u8 status);
881 
882 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
883 			      u8 role);
884 int hci_conn_del(struct hci_conn *conn);
885 void hci_conn_hash_flush(struct hci_dev *hdev);
886 void hci_conn_check_pending(struct hci_dev *hdev);
887 
888 struct hci_chan *hci_chan_create(struct hci_conn *conn);
889 void hci_chan_del(struct hci_chan *chan);
890 void hci_chan_list_flush(struct hci_conn *conn);
891 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
892 
893 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
894 				     u8 dst_type, u8 sec_level,
895 				     u16 conn_timeout);
896 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
897 				u8 dst_type, u8 sec_level, u16 conn_timeout,
898 				u8 role);
899 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
900 				 u8 sec_level, u8 auth_type);
901 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
902 				 __u16 setting);
903 int hci_conn_check_link_mode(struct hci_conn *conn);
904 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
905 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
906 		      bool initiator);
907 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
908 
909 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
910 
911 void hci_le_conn_failed(struct hci_conn *conn, u8 status);
912 
913 /*
914  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
915  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
916  * working or anything else. They just guarantee that the object is available
917  * and can be dereferenced. So you can use its locks, local variables and any
918  * other constant data.
919  * Before accessing runtime data, you _must_ lock the object and then check that
920  * it is still running. As soon as you release the locks, the connection might
921  * get dropped, though.
922  *
923  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
924  * how long the underlying connection is held. So every channel that runs on the
925  * hci_conn object calls this to prevent the connection from disappearing. As
926  * long as you hold a device, you must also guarantee that you have a valid
927  * reference to the device via hci_conn_get() (or the initial reference from
928  * hci_conn_add()).
929  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
930  * break because nobody cares for that. But this means, we cannot use
931  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
932  */
933 
934 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
935 {
936 	get_device(&conn->dev);
937 	return conn;
938 }
939 
940 static inline void hci_conn_put(struct hci_conn *conn)
941 {
942 	put_device(&conn->dev);
943 }
944 
945 static inline void hci_conn_hold(struct hci_conn *conn)
946 {
947 	BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
948 
949 	atomic_inc(&conn->refcnt);
950 	cancel_delayed_work(&conn->disc_work);
951 }
952 
953 static inline void hci_conn_drop(struct hci_conn *conn)
954 {
955 	BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
956 
957 	if (atomic_dec_and_test(&conn->refcnt)) {
958 		unsigned long timeo;
959 
960 		switch (conn->type) {
961 		case ACL_LINK:
962 		case LE_LINK:
963 			cancel_delayed_work(&conn->idle_work);
964 			if (conn->state == BT_CONNECTED) {
965 				timeo = conn->disc_timeout;
966 				if (!conn->out)
967 					timeo *= 2;
968 			} else {
969 				timeo = 0;
970 			}
971 			break;
972 
973 		case AMP_LINK:
974 			timeo = conn->disc_timeout;
975 			break;
976 
977 		default:
978 			timeo = 0;
979 			break;
980 		}
981 
982 		cancel_delayed_work(&conn->disc_work);
983 		queue_delayed_work(conn->hdev->workqueue,
984 				   &conn->disc_work, timeo);
985 	}
986 }
987 
988 /* ----- HCI Devices ----- */
989 static inline void hci_dev_put(struct hci_dev *d)
990 {
991 	BT_DBG("%s orig refcnt %d", d->name,
992 	       kref_read(&d->dev.kobj.kref));
993 
994 	put_device(&d->dev);
995 }
996 
997 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
998 {
999 	BT_DBG("%s orig refcnt %d", d->name,
1000 	       kref_read(&d->dev.kobj.kref));
1001 
1002 	get_device(&d->dev);
1003 	return d;
1004 }
1005 
1006 #define hci_dev_lock(d)		mutex_lock(&d->lock)
1007 #define hci_dev_unlock(d)	mutex_unlock(&d->lock)
1008 
1009 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1010 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1011 
1012 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1013 {
1014 	return dev_get_drvdata(&hdev->dev);
1015 }
1016 
1017 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1018 {
1019 	dev_set_drvdata(&hdev->dev, data);
1020 }
1021 
1022 struct hci_dev *hci_dev_get(int index);
1023 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1024 
1025 struct hci_dev *hci_alloc_dev(void);
1026 void hci_free_dev(struct hci_dev *hdev);
1027 int hci_register_dev(struct hci_dev *hdev);
1028 void hci_unregister_dev(struct hci_dev *hdev);
1029 int hci_suspend_dev(struct hci_dev *hdev);
1030 int hci_resume_dev(struct hci_dev *hdev);
1031 int hci_reset_dev(struct hci_dev *hdev);
1032 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1033 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1034 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1035 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1036 int hci_dev_open(__u16 dev);
1037 int hci_dev_close(__u16 dev);
1038 int hci_dev_do_close(struct hci_dev *hdev);
1039 int hci_dev_reset(__u16 dev);
1040 int hci_dev_reset_stat(__u16 dev);
1041 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1042 int hci_get_dev_list(void __user *arg);
1043 int hci_get_dev_info(void __user *arg);
1044 int hci_get_conn_list(void __user *arg);
1045 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1046 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1047 int hci_inquiry(void __user *arg);
1048 
1049 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1050 					   bdaddr_t *bdaddr, u8 type);
1051 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1052 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1053 void hci_bdaddr_list_clear(struct list_head *list);
1054 
1055 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1056 					       bdaddr_t *addr, u8 addr_type);
1057 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1058 					    bdaddr_t *addr, u8 addr_type);
1059 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1060 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1061 
1062 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1063 						  bdaddr_t *addr,
1064 						  u8 addr_type);
1065 
1066 void hci_uuids_clear(struct hci_dev *hdev);
1067 
1068 void hci_link_keys_clear(struct hci_dev *hdev);
1069 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1070 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1071 				  bdaddr_t *bdaddr, u8 *val, u8 type,
1072 				  u8 pin_len, bool *persistent);
1073 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1074 			    u8 addr_type, u8 type, u8 authenticated,
1075 			    u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1076 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1077 			     u8 addr_type, u8 role);
1078 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1079 void hci_smp_ltks_clear(struct hci_dev *hdev);
1080 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1081 
1082 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1083 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1084 				     u8 addr_type);
1085 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1086 			    u8 addr_type, u8 val[16], bdaddr_t *rpa);
1087 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1088 void hci_smp_irks_clear(struct hci_dev *hdev);
1089 
1090 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1091 
1092 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1093 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1094 					  bdaddr_t *bdaddr, u8 bdaddr_type);
1095 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1096 			    u8 bdaddr_type, u8 *hash192, u8 *rand192,
1097 			    u8 *hash256, u8 *rand256);
1098 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1099 			       u8 bdaddr_type);
1100 
1101 void hci_adv_instances_clear(struct hci_dev *hdev);
1102 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1103 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1104 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
1105 			 u16 adv_data_len, u8 *adv_data,
1106 			 u16 scan_rsp_len, u8 *scan_rsp_data,
1107 			 u16 timeout, u16 duration);
1108 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1109 
1110 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1111 
1112 void hci_init_sysfs(struct hci_dev *hdev);
1113 void hci_conn_init_sysfs(struct hci_conn *conn);
1114 void hci_conn_add_sysfs(struct hci_conn *conn);
1115 void hci_conn_del_sysfs(struct hci_conn *conn);
1116 
1117 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1118 
1119 /* ----- LMP capabilities ----- */
1120 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1121 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1122 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1123 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1124 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1125 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1126 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1127 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1128 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1129 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1130 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1131 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1132 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1133 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1134 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1135 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1136 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1137 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1138 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1139 
1140 /* ----- Extended LMP capabilities ----- */
1141 #define lmp_csb_master_capable(dev) ((dev)->features[2][0] & LMP_CSB_MASTER)
1142 #define lmp_csb_slave_capable(dev)  ((dev)->features[2][0] & LMP_CSB_SLAVE)
1143 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1144 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1145 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1146 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1147 
1148 /* ----- Host capabilities ----- */
1149 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1150 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1151 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1152 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1153 
1154 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1155 				!hci_dev_test_flag(dev, HCI_AUTO_OFF))
1156 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1157 				hci_dev_test_flag(dev, HCI_SC_ENABLED))
1158 
1159 /* ----- HCI protocols ----- */
1160 #define HCI_PROTO_DEFER             0x01
1161 
1162 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1163 					__u8 type, __u8 *flags)
1164 {
1165 	switch (type) {
1166 	case ACL_LINK:
1167 		return l2cap_connect_ind(hdev, bdaddr);
1168 
1169 	case SCO_LINK:
1170 	case ESCO_LINK:
1171 		return sco_connect_ind(hdev, bdaddr, flags);
1172 
1173 	default:
1174 		BT_ERR("unknown link type %d", type);
1175 		return -EINVAL;
1176 	}
1177 }
1178 
1179 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1180 {
1181 	if (conn->type != ACL_LINK && conn->type != LE_LINK)
1182 		return HCI_ERROR_REMOTE_USER_TERM;
1183 
1184 	return l2cap_disconn_ind(conn);
1185 }
1186 
1187 /* ----- HCI callbacks ----- */
1188 struct hci_cb {
1189 	struct list_head list;
1190 
1191 	char *name;
1192 
1193 	void (*connect_cfm)	(struct hci_conn *conn, __u8 status);
1194 	void (*disconn_cfm)	(struct hci_conn *conn, __u8 status);
1195 	void (*security_cfm)	(struct hci_conn *conn, __u8 status,
1196 								__u8 encrypt);
1197 	void (*key_change_cfm)	(struct hci_conn *conn, __u8 status);
1198 	void (*role_switch_cfm)	(struct hci_conn *conn, __u8 status, __u8 role);
1199 };
1200 
1201 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1202 {
1203 	struct hci_cb *cb;
1204 
1205 	mutex_lock(&hci_cb_list_lock);
1206 	list_for_each_entry(cb, &hci_cb_list, list) {
1207 		if (cb->connect_cfm)
1208 			cb->connect_cfm(conn, status);
1209 	}
1210 	mutex_unlock(&hci_cb_list_lock);
1211 
1212 	if (conn->connect_cfm_cb)
1213 		conn->connect_cfm_cb(conn, status);
1214 }
1215 
1216 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1217 {
1218 	struct hci_cb *cb;
1219 
1220 	mutex_lock(&hci_cb_list_lock);
1221 	list_for_each_entry(cb, &hci_cb_list, list) {
1222 		if (cb->disconn_cfm)
1223 			cb->disconn_cfm(conn, reason);
1224 	}
1225 	mutex_unlock(&hci_cb_list_lock);
1226 
1227 	if (conn->disconn_cfm_cb)
1228 		conn->disconn_cfm_cb(conn, reason);
1229 }
1230 
1231 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1232 {
1233 	struct hci_cb *cb;
1234 	__u8 encrypt;
1235 
1236 	if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1237 		return;
1238 
1239 	encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1240 
1241 	mutex_lock(&hci_cb_list_lock);
1242 	list_for_each_entry(cb, &hci_cb_list, list) {
1243 		if (cb->security_cfm)
1244 			cb->security_cfm(conn, status, encrypt);
1245 	}
1246 	mutex_unlock(&hci_cb_list_lock);
1247 
1248 	if (conn->security_cfm_cb)
1249 		conn->security_cfm_cb(conn, status);
1250 }
1251 
1252 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
1253 								__u8 encrypt)
1254 {
1255 	struct hci_cb *cb;
1256 
1257 	if (conn->sec_level == BT_SECURITY_SDP)
1258 		conn->sec_level = BT_SECURITY_LOW;
1259 
1260 	if (conn->pending_sec_level > conn->sec_level)
1261 		conn->sec_level = conn->pending_sec_level;
1262 
1263 	mutex_lock(&hci_cb_list_lock);
1264 	list_for_each_entry(cb, &hci_cb_list, list) {
1265 		if (cb->security_cfm)
1266 			cb->security_cfm(conn, status, encrypt);
1267 	}
1268 	mutex_unlock(&hci_cb_list_lock);
1269 
1270 	if (conn->security_cfm_cb)
1271 		conn->security_cfm_cb(conn, status);
1272 }
1273 
1274 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1275 {
1276 	struct hci_cb *cb;
1277 
1278 	mutex_lock(&hci_cb_list_lock);
1279 	list_for_each_entry(cb, &hci_cb_list, list) {
1280 		if (cb->key_change_cfm)
1281 			cb->key_change_cfm(conn, status);
1282 	}
1283 	mutex_unlock(&hci_cb_list_lock);
1284 }
1285 
1286 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1287 								__u8 role)
1288 {
1289 	struct hci_cb *cb;
1290 
1291 	mutex_lock(&hci_cb_list_lock);
1292 	list_for_each_entry(cb, &hci_cb_list, list) {
1293 		if (cb->role_switch_cfm)
1294 			cb->role_switch_cfm(conn, status, role);
1295 	}
1296 	mutex_unlock(&hci_cb_list_lock);
1297 }
1298 
1299 static inline void *eir_get_data(u8 *eir, size_t eir_len, u8 type,
1300 				 size_t *data_len)
1301 {
1302 	size_t parsed = 0;
1303 
1304 	if (eir_len < 2)
1305 		return NULL;
1306 
1307 	while (parsed < eir_len - 1) {
1308 		u8 field_len = eir[0];
1309 
1310 		if (field_len == 0)
1311 			break;
1312 
1313 		parsed += field_len + 1;
1314 
1315 		if (parsed > eir_len)
1316 			break;
1317 
1318 		if (eir[1] != type) {
1319 			eir += field_len + 1;
1320 			continue;
1321 		}
1322 
1323 		/* Zero length data */
1324 		if (field_len == 1)
1325 			return NULL;
1326 
1327 		if (data_len)
1328 			*data_len = field_len - 1;
1329 
1330 		return &eir[2];
1331 	}
1332 
1333 	return NULL;
1334 }
1335 
1336 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1337 {
1338 	if (addr_type != ADDR_LE_DEV_RANDOM)
1339 		return false;
1340 
1341 	if ((bdaddr->b[5] & 0xc0) == 0x40)
1342 	       return true;
1343 
1344 	return false;
1345 }
1346 
1347 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1348 {
1349 	if (addr_type == ADDR_LE_DEV_PUBLIC)
1350 		return true;
1351 
1352 	/* Check for Random Static address type */
1353 	if ((addr->b[5] & 0xc0) == 0xc0)
1354 		return true;
1355 
1356 	return false;
1357 }
1358 
1359 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1360 					  bdaddr_t *bdaddr, u8 addr_type)
1361 {
1362 	if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1363 		return NULL;
1364 
1365 	return hci_find_irk_by_rpa(hdev, bdaddr);
1366 }
1367 
1368 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1369 					u16 to_multiplier)
1370 {
1371 	u16 max_latency;
1372 
1373 	if (min > max || min < 6 || max > 3200)
1374 		return -EINVAL;
1375 
1376 	if (to_multiplier < 10 || to_multiplier > 3200)
1377 		return -EINVAL;
1378 
1379 	if (max >= to_multiplier * 8)
1380 		return -EINVAL;
1381 
1382 	max_latency = (to_multiplier * 4 / max) - 1;
1383 	if (latency > 499 || latency > max_latency)
1384 		return -EINVAL;
1385 
1386 	return 0;
1387 }
1388 
1389 int hci_register_cb(struct hci_cb *hcb);
1390 int hci_unregister_cb(struct hci_cb *hcb);
1391 
1392 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1393 			       const void *param, u32 timeout);
1394 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1395 				  const void *param, u8 event, u32 timeout);
1396 
1397 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1398 		 const void *param);
1399 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1400 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1401 
1402 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1403 
1404 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1405 			     const void *param, u32 timeout);
1406 
1407 /* ----- HCI Sockets ----- */
1408 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1409 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1410 			 int flag, struct sock *skip_sk);
1411 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1412 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
1413 				 void *data, u16 data_len, ktime_t tstamp,
1414 				 int flag, struct sock *skip_sk);
1415 
1416 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1417 
1418 #define HCI_MGMT_VAR_LEN	BIT(0)
1419 #define HCI_MGMT_NO_HDEV	BIT(1)
1420 #define HCI_MGMT_UNTRUSTED	BIT(2)
1421 #define HCI_MGMT_UNCONFIGURED	BIT(3)
1422 
1423 struct hci_mgmt_handler {
1424 	int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1425 		     u16 data_len);
1426 	size_t data_len;
1427 	unsigned long flags;
1428 };
1429 
1430 struct hci_mgmt_chan {
1431 	struct list_head list;
1432 	unsigned short channel;
1433 	size_t handler_count;
1434 	const struct hci_mgmt_handler *handlers;
1435 	void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1436 };
1437 
1438 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1439 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1440 
1441 /* Management interface */
1442 #define DISCOV_TYPE_BREDR		(BIT(BDADDR_BREDR))
1443 #define DISCOV_TYPE_LE			(BIT(BDADDR_LE_PUBLIC) | \
1444 					 BIT(BDADDR_LE_RANDOM))
1445 #define DISCOV_TYPE_INTERLEAVED		(BIT(BDADDR_BREDR) | \
1446 					 BIT(BDADDR_LE_PUBLIC) | \
1447 					 BIT(BDADDR_LE_RANDOM))
1448 
1449 /* These LE scan and inquiry parameters were chosen according to LE General
1450  * Discovery Procedure specification.
1451  */
1452 #define DISCOV_LE_SCAN_WIN		0x12
1453 #define DISCOV_LE_SCAN_INT		0x12
1454 #define DISCOV_LE_TIMEOUT		10240	/* msec */
1455 #define DISCOV_INTERLEAVED_TIMEOUT	5120	/* msec */
1456 #define DISCOV_INTERLEAVED_INQUIRY_LEN	0x04
1457 #define DISCOV_BREDR_INQUIRY_LEN	0x08
1458 #define DISCOV_LE_RESTART_DELAY		msecs_to_jiffies(200)	/* msec */
1459 
1460 void mgmt_fill_version_info(void *ver);
1461 int mgmt_new_settings(struct hci_dev *hdev);
1462 void mgmt_index_added(struct hci_dev *hdev);
1463 void mgmt_index_removed(struct hci_dev *hdev);
1464 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1465 void mgmt_power_on(struct hci_dev *hdev, int err);
1466 void __mgmt_power_off(struct hci_dev *hdev);
1467 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1468 		       bool persistent);
1469 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
1470 			   u32 flags, u8 *name, u8 name_len);
1471 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1472 			      u8 link_type, u8 addr_type, u8 reason,
1473 			      bool mgmt_connected);
1474 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1475 			    u8 link_type, u8 addr_type, u8 status);
1476 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1477 			 u8 addr_type, u8 status);
1478 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1479 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1480 				  u8 status);
1481 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1482 				      u8 status);
1483 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1484 			      u8 link_type, u8 addr_type, u32 value,
1485 			      u8 confirm_hint);
1486 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1487 				     u8 link_type, u8 addr_type, u8 status);
1488 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1489 					 u8 link_type, u8 addr_type, u8 status);
1490 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1491 			      u8 link_type, u8 addr_type);
1492 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1493 				     u8 link_type, u8 addr_type, u8 status);
1494 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1495 					 u8 link_type, u8 addr_type, u8 status);
1496 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1497 			     u8 link_type, u8 addr_type, u32 passkey,
1498 			     u8 entered);
1499 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
1500 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1501 void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1502 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1503 				    u8 status);
1504 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1505 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
1506 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
1507 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1508 		       u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
1509 		       u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
1510 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1511 		      u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1512 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1513 bool mgmt_powering_down(struct hci_dev *hdev);
1514 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
1515 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
1516 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
1517 		   bool persistent);
1518 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
1519 			 u8 bdaddr_type, u8 store_hint, u16 min_interval,
1520 			 u16 max_interval, u16 latency, u16 timeout);
1521 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
1522 bool mgmt_get_connectable(struct hci_dev *hdev);
1523 void mgmt_set_connectable_complete(struct hci_dev *hdev, u8 status);
1524 void mgmt_set_discoverable_complete(struct hci_dev *hdev, u8 status);
1525 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
1526 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
1527 			    u8 instance);
1528 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
1529 			      u8 instance);
1530 
1531 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
1532 		      u16 to_multiplier);
1533 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
1534 		      __u8 ltk[16], __u8 key_size);
1535 
1536 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
1537 			       u8 *bdaddr_type);
1538 
1539 #define SCO_AIRMODE_MASK       0x0003
1540 #define SCO_AIRMODE_CVSD       0x0000
1541 #define SCO_AIRMODE_TRANSP     0x0003
1542 
1543 #endif /* __HCI_CORE_H */
1544