2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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;
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.
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.
28 #include <net/bluetooth/hci.h>
30 /* HCI upper protocols */
31 #define HCI_PROTO_L2CAP 0
32 #define HCI_PROTO_SCO 1
34 /* HCI Core structures */
38 __u8 pscan_period_mode;
45 struct inquiry_entry {
46 struct inquiry_entry *next;
48 struct inquiry_data data;
51 struct inquiry_cache {
54 struct inquiry_entry *list;
57 struct hci_conn_hash {
58 struct list_head list;
65 struct list_head list;
89 __u16 sniff_min_interval;
90 __u16 sniff_max_interval;
100 unsigned int acl_pkts;
101 unsigned int sco_pkts;
103 unsigned long cmd_last_tx;
104 unsigned long acl_last_tx;
105 unsigned long sco_last_tx;
107 struct tasklet_struct cmd_task;
108 struct tasklet_struct rx_task;
109 struct tasklet_struct tx_task;
111 struct sk_buff_head rx_q;
112 struct sk_buff_head raw_q;
113 struct sk_buff_head cmd_q;
115 struct sk_buff *sent_cmd;
116 struct sk_buff *reassembly[3];
118 struct semaphore req_lock;
119 wait_queue_head_t req_wait_q;
123 struct inquiry_cache inq_cache;
124 struct hci_conn_hash conn_hash;
126 struct hci_dev_stats stat;
128 struct sk_buff_head driver_init;
135 struct device *parent;
138 struct module *owner;
140 int (*open)(struct hci_dev *hdev);
141 int (*close)(struct hci_dev *hdev);
142 int (*flush)(struct hci_dev *hdev);
143 int (*send)(struct sk_buff *skb);
144 void (*destruct)(struct hci_dev *hdev);
145 void (*notify)(struct hci_dev *hdev, unsigned int evt);
146 int (*ioctl)(struct hci_dev *hdev, unsigned int cmd, unsigned long arg);
150 struct list_head list;
172 struct sk_buff_head data_q;
174 struct timer_list disc_timer;
175 struct timer_list idle_timer;
177 struct work_struct work;
181 struct hci_dev *hdev;
186 struct hci_conn *link;
189 extern struct hci_proto *hci_proto[];
190 extern struct list_head hci_dev_list;
191 extern struct list_head hci_cb_list;
192 extern rwlock_t hci_dev_list_lock;
193 extern rwlock_t hci_cb_list_lock;
195 /* ----- Inquiry cache ----- */
196 #define INQUIRY_CACHE_AGE_MAX (HZ*30) // 30 seconds
197 #define INQUIRY_ENTRY_AGE_MAX (HZ*60) // 60 seconds
199 #define inquiry_cache_lock(c) spin_lock(&c->lock)
200 #define inquiry_cache_unlock(c) spin_unlock(&c->lock)
201 #define inquiry_cache_lock_bh(c) spin_lock_bh(&c->lock)
202 #define inquiry_cache_unlock_bh(c) spin_unlock_bh(&c->lock)
204 static inline void inquiry_cache_init(struct hci_dev *hdev)
206 struct inquiry_cache *c = &hdev->inq_cache;
207 spin_lock_init(&c->lock);
211 static inline int inquiry_cache_empty(struct hci_dev *hdev)
213 struct inquiry_cache *c = &hdev->inq_cache;
214 return (c->list == NULL);
217 static inline long inquiry_cache_age(struct hci_dev *hdev)
219 struct inquiry_cache *c = &hdev->inq_cache;
220 return jiffies - c->timestamp;
223 static inline long inquiry_entry_age(struct inquiry_entry *e)
225 return jiffies - e->timestamp;
228 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr);
229 void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data);
231 /* ----- HCI Connections ----- */
234 HCI_CONN_ENCRYPT_PEND,
235 HCI_CONN_RSWITCH_PEND,
236 HCI_CONN_MODE_CHANGE_PEND,
239 static inline void hci_conn_hash_init(struct hci_dev *hdev)
241 struct hci_conn_hash *h = &hdev->conn_hash;
242 INIT_LIST_HEAD(&h->list);
243 spin_lock_init(&h->lock);
248 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
250 struct hci_conn_hash *h = &hdev->conn_hash;
251 list_add(&c->list, &h->list);
252 if (c->type == ACL_LINK)
258 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
260 struct hci_conn_hash *h = &hdev->conn_hash;
262 if (c->type == ACL_LINK)
268 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
271 struct hci_conn_hash *h = &hdev->conn_hash;
275 list_for_each(p, &h->list) {
276 c = list_entry(p, struct hci_conn, list);
277 if (c->handle == handle)
283 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
284 __u8 type, bdaddr_t *ba)
286 struct hci_conn_hash *h = &hdev->conn_hash;
290 list_for_each(p, &h->list) {
291 c = list_entry(p, struct hci_conn, list);
292 if (c->type == type && !bacmp(&c->dst, ba))
298 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
299 __u8 type, __u16 state)
301 struct hci_conn_hash *h = &hdev->conn_hash;
305 list_for_each(p, &h->list) {
306 c = list_entry(p, struct hci_conn, list);
307 if (c->type == type && c->state == state)
313 void hci_acl_connect(struct hci_conn *conn);
314 void hci_acl_disconn(struct hci_conn *conn, __u8 reason);
315 void hci_add_sco(struct hci_conn *conn, __u16 handle);
317 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst);
318 int hci_conn_del(struct hci_conn *conn);
319 void hci_conn_hash_flush(struct hci_dev *hdev);
320 void hci_conn_check_pending(struct hci_dev *hdev);
322 struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *src);
323 int hci_conn_auth(struct hci_conn *conn);
324 int hci_conn_encrypt(struct hci_conn *conn);
325 int hci_conn_change_link_key(struct hci_conn *conn);
326 int hci_conn_switch_role(struct hci_conn *conn, uint8_t role);
328 void hci_conn_enter_active_mode(struct hci_conn *conn);
329 void hci_conn_enter_sniff_mode(struct hci_conn *conn);
331 static inline void hci_conn_hold(struct hci_conn *conn)
333 atomic_inc(&conn->refcnt);
334 del_timer(&conn->disc_timer);
337 static inline void hci_conn_put(struct hci_conn *conn)
339 if (atomic_dec_and_test(&conn->refcnt)) {
341 if (conn->type == ACL_LINK) {
342 del_timer(&conn->idle_timer);
343 if (conn->state == BT_CONNECTED) {
344 timeo = msecs_to_jiffies(HCI_DISCONN_TIMEOUT);
348 timeo = msecs_to_jiffies(10);
350 timeo = msecs_to_jiffies(10);
351 mod_timer(&conn->disc_timer, jiffies + timeo);
355 /* ----- HCI tasks ----- */
356 static inline void hci_sched_cmd(struct hci_dev *hdev)
358 tasklet_schedule(&hdev->cmd_task);
361 static inline void hci_sched_rx(struct hci_dev *hdev)
363 tasklet_schedule(&hdev->rx_task);
366 static inline void hci_sched_tx(struct hci_dev *hdev)
368 tasklet_schedule(&hdev->tx_task);
371 /* ----- HCI Devices ----- */
372 static inline void __hci_dev_put(struct hci_dev *d)
374 if (atomic_dec_and_test(&d->refcnt))
378 static inline void hci_dev_put(struct hci_dev *d)
381 module_put(d->owner);
384 static inline struct hci_dev *__hci_dev_hold(struct hci_dev *d)
386 atomic_inc(&d->refcnt);
390 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
392 if (try_module_get(d->owner))
393 return __hci_dev_hold(d);
397 #define hci_dev_lock(d) spin_lock(&d->lock)
398 #define hci_dev_unlock(d) spin_unlock(&d->lock)
399 #define hci_dev_lock_bh(d) spin_lock_bh(&d->lock)
400 #define hci_dev_unlock_bh(d) spin_unlock_bh(&d->lock)
402 struct hci_dev *hci_dev_get(int index);
403 struct hci_dev *hci_get_route(bdaddr_t *src, bdaddr_t *dst);
405 struct hci_dev *hci_alloc_dev(void);
406 void hci_free_dev(struct hci_dev *hdev);
407 int hci_register_dev(struct hci_dev *hdev);
408 int hci_unregister_dev(struct hci_dev *hdev);
409 int hci_suspend_dev(struct hci_dev *hdev);
410 int hci_resume_dev(struct hci_dev *hdev);
411 int hci_dev_open(__u16 dev);
412 int hci_dev_close(__u16 dev);
413 int hci_dev_reset(__u16 dev);
414 int hci_dev_reset_stat(__u16 dev);
415 int hci_dev_cmd(unsigned int cmd, void __user *arg);
416 int hci_get_dev_list(void __user *arg);
417 int hci_get_dev_info(void __user *arg);
418 int hci_get_conn_list(void __user *arg);
419 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
420 int hci_inquiry(void __user *arg);
422 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
424 /* Receive frame from HCI drivers */
425 static inline int hci_recv_frame(struct sk_buff *skb)
427 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
428 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
429 && !test_bit(HCI_INIT, &hdev->flags))) {
435 bt_cb(skb)->incoming = 1;
438 __net_timestamp(skb);
440 /* Queue frame for rx task */
441 skb_queue_tail(&hdev->rx_q, skb);
446 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count);
448 int hci_register_sysfs(struct hci_dev *hdev);
449 void hci_unregister_sysfs(struct hci_dev *hdev);
450 void hci_conn_add_sysfs(struct hci_conn *conn);
451 void hci_conn_del_sysfs(struct hci_conn *conn);
453 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->parent = (pdev))
455 /* ----- LMP capabilities ----- */
456 #define lmp_rswitch_capable(dev) ((dev)->features[0] & LMP_RSWITCH)
457 #define lmp_encrypt_capable(dev) ((dev)->features[0] & LMP_ENCRYPT)
458 #define lmp_sniff_capable(dev) ((dev)->features[0] & LMP_SNIFF)
459 #define lmp_sniffsubr_capable(dev) ((dev)->features[5] & LMP_SNIFF_SUBR)
460 #define lmp_esco_capable(dev) ((dev)->features[3] & LMP_ESCO)
462 /* ----- HCI protocols ----- */
470 int (*connect_ind) (struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type);
471 int (*connect_cfm) (struct hci_conn *conn, __u8 status);
472 int (*disconn_ind) (struct hci_conn *conn, __u8 reason);
473 int (*recv_acldata) (struct hci_conn *conn, struct sk_buff *skb, __u16 flags);
474 int (*recv_scodata) (struct hci_conn *conn, struct sk_buff *skb);
475 int (*auth_cfm) (struct hci_conn *conn, __u8 status);
476 int (*encrypt_cfm) (struct hci_conn *conn, __u8 status);
479 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type)
481 register struct hci_proto *hp;
484 hp = hci_proto[HCI_PROTO_L2CAP];
485 if (hp && hp->connect_ind)
486 mask |= hp->connect_ind(hdev, bdaddr, type);
488 hp = hci_proto[HCI_PROTO_SCO];
489 if (hp && hp->connect_ind)
490 mask |= hp->connect_ind(hdev, bdaddr, type);
495 static inline void hci_proto_connect_cfm(struct hci_conn *conn, __u8 status)
497 register struct hci_proto *hp;
499 hp = hci_proto[HCI_PROTO_L2CAP];
500 if (hp && hp->connect_cfm)
501 hp->connect_cfm(conn, status);
503 hp = hci_proto[HCI_PROTO_SCO];
504 if (hp && hp->connect_cfm)
505 hp->connect_cfm(conn, status);
508 static inline void hci_proto_disconn_ind(struct hci_conn *conn, __u8 reason)
510 register struct hci_proto *hp;
512 hp = hci_proto[HCI_PROTO_L2CAP];
513 if (hp && hp->disconn_ind)
514 hp->disconn_ind(conn, reason);
516 hp = hci_proto[HCI_PROTO_SCO];
517 if (hp && hp->disconn_ind)
518 hp->disconn_ind(conn, reason);
521 static inline void hci_proto_auth_cfm(struct hci_conn *conn, __u8 status)
523 register struct hci_proto *hp;
525 hp = hci_proto[HCI_PROTO_L2CAP];
526 if (hp && hp->auth_cfm)
527 hp->auth_cfm(conn, status);
529 hp = hci_proto[HCI_PROTO_SCO];
530 if (hp && hp->auth_cfm)
531 hp->auth_cfm(conn, status);
534 static inline void hci_proto_encrypt_cfm(struct hci_conn *conn, __u8 status)
536 register struct hci_proto *hp;
538 hp = hci_proto[HCI_PROTO_L2CAP];
539 if (hp && hp->encrypt_cfm)
540 hp->encrypt_cfm(conn, status);
542 hp = hci_proto[HCI_PROTO_SCO];
543 if (hp && hp->encrypt_cfm)
544 hp->encrypt_cfm(conn, status);
547 int hci_register_proto(struct hci_proto *hproto);
548 int hci_unregister_proto(struct hci_proto *hproto);
550 /* ----- HCI callbacks ----- */
552 struct list_head list;
556 void (*auth_cfm) (struct hci_conn *conn, __u8 status);
557 void (*encrypt_cfm) (struct hci_conn *conn, __u8 status, __u8 encrypt);
558 void (*key_change_cfm) (struct hci_conn *conn, __u8 status);
559 void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
562 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
566 hci_proto_auth_cfm(conn, status);
568 read_lock_bh(&hci_cb_list_lock);
569 list_for_each(p, &hci_cb_list) {
570 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
572 cb->auth_cfm(conn, status);
574 read_unlock_bh(&hci_cb_list_lock);
577 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status, __u8 encrypt)
581 hci_proto_encrypt_cfm(conn, status);
583 read_lock_bh(&hci_cb_list_lock);
584 list_for_each(p, &hci_cb_list) {
585 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
587 cb->encrypt_cfm(conn, status, encrypt);
589 read_unlock_bh(&hci_cb_list_lock);
592 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
596 read_lock_bh(&hci_cb_list_lock);
597 list_for_each(p, &hci_cb_list) {
598 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
599 if (cb->key_change_cfm)
600 cb->key_change_cfm(conn, status);
602 read_unlock_bh(&hci_cb_list_lock);
605 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status, __u8 role)
609 read_lock_bh(&hci_cb_list_lock);
610 list_for_each(p, &hci_cb_list) {
611 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
612 if (cb->role_switch_cfm)
613 cb->role_switch_cfm(conn, status, role);
615 read_unlock_bh(&hci_cb_list_lock);
618 int hci_register_cb(struct hci_cb *hcb);
619 int hci_unregister_cb(struct hci_cb *hcb);
621 int hci_register_notifier(struct notifier_block *nb);
622 int hci_unregister_notifier(struct notifier_block *nb);
624 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param);
625 int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags);
626 int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
628 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
630 void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data);
632 /* ----- HCI Sockets ----- */
633 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
635 /* HCI info for socket */
636 #define hci_pi(sk) ((struct hci_pinfo *) sk)
640 struct hci_dev *hdev;
641 struct hci_filter filter;
645 /* HCI security filter */
646 #define HCI_SFLT_MAX_OGF 5
648 struct hci_sec_filter {
651 __u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4];
654 /* ----- HCI requests ----- */
655 #define HCI_REQ_DONE 0
656 #define HCI_REQ_PEND 1
657 #define HCI_REQ_CANCELED 2
659 #define hci_req_lock(d) down(&d->req_lock)
660 #define hci_req_unlock(d) up(&d->req_lock)
662 void hci_req_complete(struct hci_dev *hdev, int result);
664 #endif /* __HCI_CORE_H */