1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
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 __BLUETOOTH_H
26 #define __BLUETOOTH_H
27
28 #include <linux/poll.h>
29 #include <net/sock.h>
30 #include <linux/seq_file.h>
31
32 #define BT_SUBSYS_VERSION 2
33 #define BT_SUBSYS_REVISION 22
34
35 #ifndef AF_BLUETOOTH
36 #define AF_BLUETOOTH 31
37 #define PF_BLUETOOTH AF_BLUETOOTH
38 #endif
39
40 /* Bluetooth versions */
41 #define BLUETOOTH_VER_1_1 1
42 #define BLUETOOTH_VER_1_2 2
43 #define BLUETOOTH_VER_2_0 3
44 #define BLUETOOTH_VER_2_1 4
45 #define BLUETOOTH_VER_4_0 6
46
47 /* Reserv for core and drivers use */
48 #define BT_SKB_RESERVE 8
49
50 #define BTPROTO_L2CAP 0
51 #define BTPROTO_HCI 1
52 #define BTPROTO_SCO 2
53 #define BTPROTO_RFCOMM 3
54 #define BTPROTO_BNEP 4
55 #define BTPROTO_CMTP 5
56 #define BTPROTO_HIDP 6
57 #define BTPROTO_AVDTP 7
58 #define BTPROTO_ISO 8
59 #define BTPROTO_LAST BTPROTO_ISO
60
61 #define SOL_HCI 0
62 #define SOL_L2CAP 6
63 #define SOL_SCO 17
64 #define SOL_RFCOMM 18
65
66 #define BT_SECURITY 4
67 struct bt_security {
68 __u8 level;
69 __u8 key_size;
70 };
71 #define BT_SECURITY_SDP 0
72 #define BT_SECURITY_LOW 1
73 #define BT_SECURITY_MEDIUM 2
74 #define BT_SECURITY_HIGH 3
75 #define BT_SECURITY_FIPS 4
76
77 #define BT_DEFER_SETUP 7
78
79 #define BT_FLUSHABLE 8
80
81 #define BT_FLUSHABLE_OFF 0
82 #define BT_FLUSHABLE_ON 1
83
84 #define BT_POWER 9
85 struct bt_power {
86 __u8 force_active;
87 };
88 #define BT_POWER_FORCE_ACTIVE_OFF 0
89 #define BT_POWER_FORCE_ACTIVE_ON 1
90
91 #define BT_CHANNEL_POLICY 10
92
93 /* BR/EDR only (default policy)
94 * AMP controllers cannot be used.
95 * Channel move requests from the remote device are denied.
96 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
97 */
98 #define BT_CHANNEL_POLICY_BREDR_ONLY 0
99
100 /* BR/EDR Preferred
101 * Allow use of AMP controllers.
102 * If the L2CAP channel is currently on AMP, move it to BR/EDR.
103 * Channel move requests from the remote device are allowed.
104 */
105 #define BT_CHANNEL_POLICY_BREDR_PREFERRED 1
106
107 /* AMP Preferred
108 * Allow use of AMP controllers
109 * If the L2CAP channel is currently on BR/EDR and AMP controller
110 * resources are available, initiate a channel move to AMP.
111 * Channel move requests from the remote device are allowed.
112 * If the L2CAP socket has not been connected yet, try to create
113 * and configure the channel directly on an AMP controller rather
114 * than BR/EDR.
115 */
116 #define BT_CHANNEL_POLICY_AMP_PREFERRED 2
117
118 #define BT_VOICE 11
119 struct bt_voice {
120 __u16 setting;
121 };
122
123 #define BT_VOICE_TRANSPARENT 0x0003
124 #define BT_VOICE_CVSD_16BIT 0x0060
125
126 #define BT_SNDMTU 12
127 #define BT_RCVMTU 13
128 #define BT_PHY 14
129
130 #define BT_PHY_BR_1M_1SLOT 0x00000001
131 #define BT_PHY_BR_1M_3SLOT 0x00000002
132 #define BT_PHY_BR_1M_5SLOT 0x00000004
133 #define BT_PHY_EDR_2M_1SLOT 0x00000008
134 #define BT_PHY_EDR_2M_3SLOT 0x00000010
135 #define BT_PHY_EDR_2M_5SLOT 0x00000020
136 #define BT_PHY_EDR_3M_1SLOT 0x00000040
137 #define BT_PHY_EDR_3M_3SLOT 0x00000080
138 #define BT_PHY_EDR_3M_5SLOT 0x00000100
139 #define BT_PHY_LE_1M_TX 0x00000200
140 #define BT_PHY_LE_1M_RX 0x00000400
141 #define BT_PHY_LE_2M_TX 0x00000800
142 #define BT_PHY_LE_2M_RX 0x00001000
143 #define BT_PHY_LE_CODED_TX 0x00002000
144 #define BT_PHY_LE_CODED_RX 0x00004000
145
146 #define BT_MODE 15
147
148 #define BT_MODE_BASIC 0x00
149 #define BT_MODE_ERTM 0x01
150 #define BT_MODE_STREAMING 0x02
151 #define BT_MODE_LE_FLOWCTL 0x03
152 #define BT_MODE_EXT_FLOWCTL 0x04
153
154 #define BT_PKT_STATUS 16
155
156 #define BT_SCM_PKT_STATUS 0x03
157
158 #define BT_ISO_QOS 17
159
160 #define BT_ISO_QOS_CIG_UNSET 0xff
161 #define BT_ISO_QOS_CIS_UNSET 0xff
162
163 #define BT_ISO_QOS_BIG_UNSET 0xff
164 #define BT_ISO_QOS_BIS_UNSET 0xff
165
166 struct bt_iso_io_qos {
167 __u32 interval;
168 __u16 latency;
169 __u16 sdu;
170 __u8 phy;
171 __u8 rtn;
172 };
173
174 struct bt_iso_qos {
175 union {
176 __u8 cig;
177 __u8 big;
178 };
179 union {
180 __u8 cis;
181 __u8 bis;
182 };
183 union {
184 __u8 sca;
185 __u8 sync_interval;
186 };
187 __u8 packing;
188 __u8 framing;
189 struct bt_iso_io_qos in;
190 struct bt_iso_io_qos out;
191 };
192
193 #define BT_ISO_PHY_1M 0x01
194 #define BT_ISO_PHY_2M 0x02
195 #define BT_ISO_PHY_CODED 0x04
196 #define BT_ISO_PHY_ANY (BT_ISO_PHY_1M | BT_ISO_PHY_2M | \
197 BT_ISO_PHY_CODED)
198
199 #define BT_CODEC 19
200
201 struct bt_codec_caps {
202 __u8 len;
203 __u8 data[];
204 } __packed;
205
206 struct bt_codec {
207 __u8 id;
208 __u16 cid;
209 __u16 vid;
210 __u8 data_path;
211 __u8 num_caps;
212 } __packed;
213
214 struct bt_codecs {
215 __u8 num_codecs;
216 struct bt_codec codecs[];
217 } __packed;
218
219 #define BT_CODEC_CVSD 0x02
220 #define BT_CODEC_TRANSPARENT 0x03
221 #define BT_CODEC_MSBC 0x05
222
223 #define BT_ISO_BASE 20
224
225 __printf(1, 2)
226 void bt_info(const char *fmt, ...);
227 __printf(1, 2)
228 void bt_warn(const char *fmt, ...);
229 __printf(1, 2)
230 void bt_err(const char *fmt, ...);
231 #if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
232 void bt_dbg_set(bool enable);
233 bool bt_dbg_get(void);
234 __printf(1, 2)
235 void bt_dbg(const char *fmt, ...);
236 #endif
237 __printf(1, 2)
238 void bt_warn_ratelimited(const char *fmt, ...);
239 __printf(1, 2)
240 void bt_err_ratelimited(const char *fmt, ...);
241
242 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
243 #define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__)
244 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
245
246 #if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
247 #define BT_DBG(fmt, ...) bt_dbg(fmt "\n", ##__VA_ARGS__)
248 #else
249 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
250 #endif
251
252 #define bt_dev_name(hdev) ((hdev) ? (hdev)->name : "null")
253
254 #define bt_dev_info(hdev, fmt, ...) \
255 BT_INFO("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
256 #define bt_dev_warn(hdev, fmt, ...) \
257 BT_WARN("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
258 #define bt_dev_err(hdev, fmt, ...) \
259 BT_ERR("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
260 #define bt_dev_dbg(hdev, fmt, ...) \
261 BT_DBG("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
262
263 #define bt_dev_warn_ratelimited(hdev, fmt, ...) \
264 bt_warn_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
265 #define bt_dev_err_ratelimited(hdev, fmt, ...) \
266 bt_err_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
267
268 /* Connection and socket states */
269 enum {
270 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
271 BT_OPEN,
272 BT_BOUND,
273 BT_LISTEN,
274 BT_CONNECT,
275 BT_CONNECT2,
276 BT_CONFIG,
277 BT_DISCONN,
278 BT_CLOSED
279 };
280
281 /* If unused will be removed by compiler */
state_to_string(int state)282 static inline const char *state_to_string(int state)
283 {
284 switch (state) {
285 case BT_CONNECTED:
286 return "BT_CONNECTED";
287 case BT_OPEN:
288 return "BT_OPEN";
289 case BT_BOUND:
290 return "BT_BOUND";
291 case BT_LISTEN:
292 return "BT_LISTEN";
293 case BT_CONNECT:
294 return "BT_CONNECT";
295 case BT_CONNECT2:
296 return "BT_CONNECT2";
297 case BT_CONFIG:
298 return "BT_CONFIG";
299 case BT_DISCONN:
300 return "BT_DISCONN";
301 case BT_CLOSED:
302 return "BT_CLOSED";
303 }
304
305 return "invalid state";
306 }
307
308 /* BD Address */
309 typedef struct {
310 __u8 b[6];
311 } __packed bdaddr_t;
312
313 /* BD Address type */
314 #define BDADDR_BREDR 0x00
315 #define BDADDR_LE_PUBLIC 0x01
316 #define BDADDR_LE_RANDOM 0x02
317
bdaddr_type_is_valid(u8 type)318 static inline bool bdaddr_type_is_valid(u8 type)
319 {
320 switch (type) {
321 case BDADDR_BREDR:
322 case BDADDR_LE_PUBLIC:
323 case BDADDR_LE_RANDOM:
324 return true;
325 }
326
327 return false;
328 }
329
bdaddr_type_is_le(u8 type)330 static inline bool bdaddr_type_is_le(u8 type)
331 {
332 switch (type) {
333 case BDADDR_LE_PUBLIC:
334 case BDADDR_LE_RANDOM:
335 return true;
336 }
337
338 return false;
339 }
340
341 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
342 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}})
343
344 /* Copy, swap, convert BD Address */
bacmp(const bdaddr_t * ba1,const bdaddr_t * ba2)345 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
346 {
347 return memcmp(ba1, ba2, sizeof(bdaddr_t));
348 }
bacpy(bdaddr_t * dst,const bdaddr_t * src)349 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
350 {
351 memcpy(dst, src, sizeof(bdaddr_t));
352 }
353
354 void baswap(bdaddr_t *dst, const bdaddr_t *src);
355
356 /* Common socket structures and functions */
357
358 #define bt_sk(__sk) ((struct bt_sock *) __sk)
359
360 struct bt_sock {
361 struct sock sk;
362 struct list_head accept_q;
363 struct sock *parent;
364 unsigned long flags;
365 void (*skb_msg_name)(struct sk_buff *, void *, int *);
366 void (*skb_put_cmsg)(struct sk_buff *, struct msghdr *, struct sock *);
367 };
368
369 enum {
370 BT_SK_DEFER_SETUP,
371 BT_SK_SUSPEND,
372 };
373
374 struct bt_sock_list {
375 struct hlist_head head;
376 rwlock_t lock;
377 #ifdef CONFIG_PROC_FS
378 int (* custom_seq_show)(struct seq_file *, void *);
379 #endif
380 };
381
382 int bt_sock_register(int proto, const struct net_proto_family *ops);
383 void bt_sock_unregister(int proto);
384 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
385 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
386 int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
387 int flags);
388 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
389 size_t len, int flags);
390 __poll_t bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
391 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
392 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
393 int bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags);
394
395 void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh);
396 void bt_accept_unlink(struct sock *sk);
397 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
398
399 /* Skb helpers */
400 struct l2cap_ctrl {
401 u8 sframe:1,
402 poll:1,
403 final:1,
404 fcs:1,
405 sar:2,
406 super:2;
407
408 u16 reqseq;
409 u16 txseq;
410 u8 retries;
411 __le16 psm;
412 bdaddr_t bdaddr;
413 struct l2cap_chan *chan;
414 };
415
416 struct sco_ctrl {
417 u8 pkt_status;
418 };
419
420 struct hci_dev;
421
422 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
423 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
424 u16 opcode, struct sk_buff *skb);
425
426 #define HCI_REQ_START BIT(0)
427 #define HCI_REQ_SKB BIT(1)
428
429 struct hci_ctrl {
430 struct sock *sk;
431 u16 opcode;
432 u8 req_flags;
433 u8 req_event;
434 union {
435 hci_req_complete_t req_complete;
436 hci_req_complete_skb_t req_complete_skb;
437 };
438 };
439
440 struct mgmt_ctrl {
441 struct hci_dev *hdev;
442 u16 opcode;
443 };
444
445 struct bt_skb_cb {
446 u8 pkt_type;
447 u8 force_active;
448 u16 expect;
449 u8 incoming:1;
450 union {
451 struct l2cap_ctrl l2cap;
452 struct sco_ctrl sco;
453 struct hci_ctrl hci;
454 struct mgmt_ctrl mgmt;
455 };
456 };
457 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
458
459 #define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type
460 #define hci_skb_expect(skb) bt_cb((skb))->expect
461 #define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode
462 #define hci_skb_event(skb) bt_cb((skb))->hci.req_event
463 #define hci_skb_sk(skb) bt_cb((skb))->hci.sk
464
bt_skb_alloc(unsigned int len,gfp_t how)465 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
466 {
467 struct sk_buff *skb;
468
469 skb = alloc_skb(len + BT_SKB_RESERVE, how);
470 if (skb)
471 skb_reserve(skb, BT_SKB_RESERVE);
472 return skb;
473 }
474
bt_skb_send_alloc(struct sock * sk,unsigned long len,int nb,int * err)475 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
476 unsigned long len, int nb, int *err)
477 {
478 struct sk_buff *skb;
479
480 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
481 if (skb)
482 skb_reserve(skb, BT_SKB_RESERVE);
483
484 if (!skb && *err)
485 return NULL;
486
487 *err = sock_error(sk);
488 if (*err)
489 goto out;
490
491 if (sk->sk_shutdown) {
492 *err = -ECONNRESET;
493 goto out;
494 }
495
496 return skb;
497
498 out:
499 kfree_skb(skb);
500 return NULL;
501 }
502
503 /* Shall not be called with lock_sock held */
bt_skb_sendmsg(struct sock * sk,struct msghdr * msg,size_t len,size_t mtu,size_t headroom,size_t tailroom)504 static inline struct sk_buff *bt_skb_sendmsg(struct sock *sk,
505 struct msghdr *msg,
506 size_t len, size_t mtu,
507 size_t headroom, size_t tailroom)
508 {
509 struct sk_buff *skb;
510 size_t size = min_t(size_t, len, mtu);
511 int err;
512
513 skb = bt_skb_send_alloc(sk, size + headroom + tailroom,
514 msg->msg_flags & MSG_DONTWAIT, &err);
515 if (!skb)
516 return ERR_PTR(err);
517
518 skb_reserve(skb, headroom);
519 skb_tailroom_reserve(skb, mtu, tailroom);
520
521 if (!copy_from_iter_full(skb_put(skb, size), size, &msg->msg_iter)) {
522 kfree_skb(skb);
523 return ERR_PTR(-EFAULT);
524 }
525
526 skb->priority = sk->sk_priority;
527
528 return skb;
529 }
530
531 /* Similar to bt_skb_sendmsg but can split the msg into multiple fragments
532 * accourding to the MTU.
533 */
bt_skb_sendmmsg(struct sock * sk,struct msghdr * msg,size_t len,size_t mtu,size_t headroom,size_t tailroom)534 static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk,
535 struct msghdr *msg,
536 size_t len, size_t mtu,
537 size_t headroom, size_t tailroom)
538 {
539 struct sk_buff *skb, **frag;
540
541 skb = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
542 if (IS_ERR(skb))
543 return skb;
544
545 len -= skb->len;
546 if (!len)
547 return skb;
548
549 /* Add remaining data over MTU as continuation fragments */
550 frag = &skb_shinfo(skb)->frag_list;
551 while (len) {
552 struct sk_buff *tmp;
553
554 tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
555 if (IS_ERR(tmp)) {
556 return skb;
557 }
558
559 len -= tmp->len;
560
561 *frag = tmp;
562 frag = &(*frag)->next;
563 }
564
565 return skb;
566 }
567
568 int bt_to_errno(u16 code);
569 __u8 bt_status(int err);
570
571 void hci_sock_set_flag(struct sock *sk, int nr);
572 void hci_sock_clear_flag(struct sock *sk, int nr);
573 int hci_sock_test_flag(struct sock *sk, int nr);
574 unsigned short hci_sock_get_channel(struct sock *sk);
575 u32 hci_sock_get_cookie(struct sock *sk);
576
577 int hci_sock_init(void);
578 void hci_sock_cleanup(void);
579
580 int bt_sysfs_init(void);
581 void bt_sysfs_cleanup(void);
582
583 int bt_procfs_init(struct net *net, const char *name,
584 struct bt_sock_list *sk_list,
585 int (*seq_show)(struct seq_file *, void *));
586 void bt_procfs_cleanup(struct net *net, const char *name);
587
588 extern struct dentry *bt_debugfs;
589
590 int l2cap_init(void);
591 void l2cap_exit(void);
592
593 #if IS_ENABLED(CONFIG_BT_BREDR)
594 int sco_init(void);
595 void sco_exit(void);
596 #else
sco_init(void)597 static inline int sco_init(void)
598 {
599 return 0;
600 }
601
sco_exit(void)602 static inline void sco_exit(void)
603 {
604 }
605 #endif
606
607 #if IS_ENABLED(CONFIG_BT_LE)
608 int iso_init(void);
609 int iso_exit(void);
610 bool iso_enabled(void);
611 #else
iso_init(void)612 static inline int iso_init(void)
613 {
614 return 0;
615 }
616
iso_exit(void)617 static inline int iso_exit(void)
618 {
619 return 0;
620 }
621
iso_enabled(void)622 static inline bool iso_enabled(void)
623 {
624 return false;
625 }
626 #endif
627
628 int mgmt_init(void);
629 void mgmt_exit(void);
630 void mgmt_cleanup(struct sock *sk);
631
632 void bt_sock_reclassify_lock(struct sock *sk, int proto);
633
634 #endif /* __BLUETOOTH_H */
635