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1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright 2023 NXP
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24*/
25
26#ifndef __BLUETOOTH_H
27#define __BLUETOOTH_H
28
29#include <linux/poll.h>
30#include <net/sock.h>
31#include <linux/seq_file.h>
32
33#define BT_SUBSYS_VERSION 2
34#define BT_SUBSYS_REVISION 22
35
36#ifndef AF_BLUETOOTH
37#define AF_BLUETOOTH 31
38#define PF_BLUETOOTH AF_BLUETOOTH
39#endif
40
41/* Bluetooth versions */
42#define BLUETOOTH_VER_1_1 1
43#define BLUETOOTH_VER_1_2 2
44#define BLUETOOTH_VER_2_0 3
45#define BLUETOOTH_VER_2_1 4
46#define BLUETOOTH_VER_4_0 6
47
48/* Reserv for core and drivers use */
49#define BT_SKB_RESERVE 8
50
51#define BTPROTO_L2CAP 0
52#define BTPROTO_HCI 1
53#define BTPROTO_SCO 2
54#define BTPROTO_RFCOMM 3
55#define BTPROTO_BNEP 4
56#define BTPROTO_CMTP 5
57#define BTPROTO_HIDP 6
58#define BTPROTO_AVDTP 7
59#define BTPROTO_ISO 8
60#define BTPROTO_LAST BTPROTO_ISO
61
62#define SOL_HCI 0
63#define SOL_L2CAP 6
64#define SOL_SCO 17
65#define SOL_RFCOMM 18
66
67#define BT_SECURITY 4
68struct bt_security {
69 __u8 level;
70 __u8 key_size;
71};
72#define BT_SECURITY_SDP 0
73#define BT_SECURITY_LOW 1
74#define BT_SECURITY_MEDIUM 2
75#define BT_SECURITY_HIGH 3
76#define BT_SECURITY_FIPS 4
77
78#define BT_DEFER_SETUP 7
79
80#define BT_FLUSHABLE 8
81
82#define BT_FLUSHABLE_OFF 0
83#define BT_FLUSHABLE_ON 1
84
85#define BT_POWER 9
86struct bt_power {
87 __u8 force_active;
88};
89#define BT_POWER_FORCE_ACTIVE_OFF 0
90#define BT_POWER_FORCE_ACTIVE_ON 1
91
92#define BT_CHANNEL_POLICY 10
93
94/* BR/EDR only (default policy)
95 * AMP controllers cannot be used.
96 * Channel move requests from the remote device are denied.
97 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
98 */
99#define BT_CHANNEL_POLICY_BREDR_ONLY 0
100
101/* BR/EDR Preferred
102 * Allow use of AMP controllers.
103 * If the L2CAP channel is currently on AMP, move it to BR/EDR.
104 * Channel move requests from the remote device are allowed.
105 */
106#define BT_CHANNEL_POLICY_BREDR_PREFERRED 1
107
108/* AMP Preferred
109 * Allow use of AMP controllers
110 * If the L2CAP channel is currently on BR/EDR and AMP controller
111 * resources are available, initiate a channel move to AMP.
112 * Channel move requests from the remote device are allowed.
113 * If the L2CAP socket has not been connected yet, try to create
114 * and configure the channel directly on an AMP controller rather
115 * than BR/EDR.
116 */
117#define BT_CHANNEL_POLICY_AMP_PREFERRED 2
118
119#define BT_VOICE 11
120struct bt_voice {
121 __u16 setting;
122};
123
124#define BT_VOICE_TRANSPARENT 0x0003
125#define BT_VOICE_CVSD_16BIT 0x0060
126#define BT_VOICE_TRANSPARENT_16BIT 0x0063
127
128#define BT_SNDMTU 12
129#define BT_RCVMTU 13
130#define BT_PHY 14
131
132#define BT_PHY_BR_1M_1SLOT 0x00000001
133#define BT_PHY_BR_1M_3SLOT 0x00000002
134#define BT_PHY_BR_1M_5SLOT 0x00000004
135#define BT_PHY_EDR_2M_1SLOT 0x00000008
136#define BT_PHY_EDR_2M_3SLOT 0x00000010
137#define BT_PHY_EDR_2M_5SLOT 0x00000020
138#define BT_PHY_EDR_3M_1SLOT 0x00000040
139#define BT_PHY_EDR_3M_3SLOT 0x00000080
140#define BT_PHY_EDR_3M_5SLOT 0x00000100
141#define BT_PHY_LE_1M_TX 0x00000200
142#define BT_PHY_LE_1M_RX 0x00000400
143#define BT_PHY_LE_2M_TX 0x00000800
144#define BT_PHY_LE_2M_RX 0x00001000
145#define BT_PHY_LE_CODED_TX 0x00002000
146#define BT_PHY_LE_CODED_RX 0x00004000
147
148#define BT_MODE 15
149
150#define BT_MODE_BASIC 0x00
151#define BT_MODE_ERTM 0x01
152#define BT_MODE_STREAMING 0x02
153#define BT_MODE_LE_FLOWCTL 0x03
154#define BT_MODE_EXT_FLOWCTL 0x04
155
156#define BT_PKT_STATUS 16
157
158#define BT_SCM_PKT_STATUS 0x03
159
160#define BT_ISO_QOS 17
161
162#define BT_ISO_QOS_CIG_UNSET 0xff
163#define BT_ISO_QOS_CIS_UNSET 0xff
164
165#define BT_ISO_QOS_BIG_UNSET 0xff
166#define BT_ISO_QOS_BIS_UNSET 0xff
167
168#define BT_ISO_SYNC_TIMEOUT 0x07d0 /* 20 secs */
169
170struct bt_iso_io_qos {
171 __u32 interval;
172 __u16 latency;
173 __u16 sdu;
174 __u8 phy;
175 __u8 rtn;
176};
177
178struct bt_iso_ucast_qos {
179 __u8 cig;
180 __u8 cis;
181 __u8 sca;
182 __u8 packing;
183 __u8 framing;
184 struct bt_iso_io_qos in;
185 struct bt_iso_io_qos out;
186};
187
188struct bt_iso_bcast_qos {
189 __u8 big;
190 __u8 bis;
191 __u8 sync_factor;
192 __u8 packing;
193 __u8 framing;
194 struct bt_iso_io_qos in;
195 struct bt_iso_io_qos out;
196 __u8 encryption;
197 __u8 bcode[16];
198 __u8 options;
199 __u16 skip;
200 __u16 sync_timeout;
201 __u8 sync_cte_type;
202 __u8 mse;
203 __u16 timeout;
204};
205
206struct bt_iso_qos {
207 union {
208 struct bt_iso_ucast_qos ucast;
209 struct bt_iso_bcast_qos bcast;
210 };
211};
212
213#define BT_ISO_PHY_1M 0x01
214#define BT_ISO_PHY_2M 0x02
215#define BT_ISO_PHY_CODED 0x04
216#define BT_ISO_PHY_ANY (BT_ISO_PHY_1M | BT_ISO_PHY_2M | \
217 BT_ISO_PHY_CODED)
218
219#define BT_CODEC 19
220
221struct bt_codec_caps {
222 __u8 len;
223 __u8 data[];
224} __packed;
225
226struct bt_codec {
227 __u8 id;
228 __u16 cid;
229 __u16 vid;
230 __u8 data_path;
231 __u8 num_caps;
232} __packed;
233
234struct bt_codecs {
235 __u8 num_codecs;
236 struct bt_codec codecs[];
237} __packed;
238
239#define BT_CODEC_CVSD 0x02
240#define BT_CODEC_TRANSPARENT 0x03
241#define BT_CODEC_MSBC 0x05
242
243#define BT_ISO_BASE 20
244
245__printf(1, 2)
246void bt_info(const char *fmt, ...);
247__printf(1, 2)
248void bt_warn(const char *fmt, ...);
249__printf(1, 2)
250void bt_err(const char *fmt, ...);
251#if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
252void bt_dbg_set(bool enable);
253bool bt_dbg_get(void);
254__printf(1, 2)
255void bt_dbg(const char *fmt, ...);
256#endif
257__printf(1, 2)
258void bt_warn_ratelimited(const char *fmt, ...);
259__printf(1, 2)
260void bt_err_ratelimited(const char *fmt, ...);
261
262#define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
263#define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__)
264#define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
265
266#if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
267#define BT_DBG(fmt, ...) bt_dbg(fmt "\n", ##__VA_ARGS__)
268#else
269#define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
270#endif
271
272#define bt_dev_name(hdev) ((hdev) ? (hdev)->name : "null")
273
274#define bt_dev_info(hdev, fmt, ...) \
275 BT_INFO("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
276#define bt_dev_warn(hdev, fmt, ...) \
277 BT_WARN("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
278#define bt_dev_err(hdev, fmt, ...) \
279 BT_ERR("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
280#define bt_dev_dbg(hdev, fmt, ...) \
281 BT_DBG("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
282
283#define bt_dev_warn_ratelimited(hdev, fmt, ...) \
284 bt_warn_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
285#define bt_dev_err_ratelimited(hdev, fmt, ...) \
286 bt_err_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
287
288/* Connection and socket states */
289enum bt_sock_state {
290 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
291 BT_OPEN,
292 BT_BOUND,
293 BT_LISTEN,
294 BT_CONNECT,
295 BT_CONNECT2,
296 BT_CONFIG,
297 BT_DISCONN,
298 BT_CLOSED
299};
300
301/* If unused will be removed by compiler */
302static inline const char *state_to_string(int state)
303{
304 switch (state) {
305 case BT_CONNECTED:
306 return "BT_CONNECTED";
307 case BT_OPEN:
308 return "BT_OPEN";
309 case BT_BOUND:
310 return "BT_BOUND";
311 case BT_LISTEN:
312 return "BT_LISTEN";
313 case BT_CONNECT:
314 return "BT_CONNECT";
315 case BT_CONNECT2:
316 return "BT_CONNECT2";
317 case BT_CONFIG:
318 return "BT_CONFIG";
319 case BT_DISCONN:
320 return "BT_DISCONN";
321 case BT_CLOSED:
322 return "BT_CLOSED";
323 }
324
325 return "invalid state";
326}
327
328/* BD Address */
329typedef struct {
330 __u8 b[6];
331} __packed bdaddr_t;
332
333/* BD Address type */
334#define BDADDR_BREDR 0x00
335#define BDADDR_LE_PUBLIC 0x01
336#define BDADDR_LE_RANDOM 0x02
337
338static inline bool bdaddr_type_is_valid(u8 type)
339{
340 switch (type) {
341 case BDADDR_BREDR:
342 case BDADDR_LE_PUBLIC:
343 case BDADDR_LE_RANDOM:
344 return true;
345 }
346
347 return false;
348}
349
350static inline bool bdaddr_type_is_le(u8 type)
351{
352 switch (type) {
353 case BDADDR_LE_PUBLIC:
354 case BDADDR_LE_RANDOM:
355 return true;
356 }
357
358 return false;
359}
360
361#define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
362#define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}})
363
364/* Copy, swap, convert BD Address */
365static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
366{
367 return memcmp(ba1, ba2, sizeof(bdaddr_t));
368}
369static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
370{
371 memcpy(dst, src, sizeof(bdaddr_t));
372}
373
374void baswap(bdaddr_t *dst, const bdaddr_t *src);
375
376/* Common socket structures and functions */
377
378#define bt_sk(__sk) ((struct bt_sock *) __sk)
379
380struct bt_sock {
381 struct sock sk;
382 struct list_head accept_q;
383 struct sock *parent;
384 unsigned long flags;
385 void (*skb_msg_name)(struct sk_buff *, void *, int *);
386 void (*skb_put_cmsg)(struct sk_buff *, struct msghdr *, struct sock *);
387};
388
389enum {
390 BT_SK_DEFER_SETUP,
391 BT_SK_SUSPEND,
392 BT_SK_PKT_STATUS
393};
394
395struct bt_sock_list {
396 struct hlist_head head;
397 rwlock_t lock;
398#ifdef CONFIG_PROC_FS
399 int (* custom_seq_show)(struct seq_file *, void *);
400#endif
401};
402
403int bt_sock_register(int proto, const struct net_proto_family *ops);
404void bt_sock_unregister(int proto);
405void bt_sock_link(struct bt_sock_list *l, struct sock *s);
406void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
407bool bt_sock_linked(struct bt_sock_list *l, struct sock *s);
408struct sock *bt_sock_alloc(struct net *net, struct socket *sock,
409 struct proto *prot, int proto, gfp_t prio, int kern);
410int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
411 int flags);
412int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
413 size_t len, int flags);
414__poll_t bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
415int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
416int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
417int bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags);
418
419void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh);
420void bt_accept_unlink(struct sock *sk);
421struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
422
423/* Skb helpers */
424struct l2cap_ctrl {
425 u8 sframe:1,
426 poll:1,
427 final:1,
428 fcs:1,
429 sar:2,
430 super:2;
431
432 u16 reqseq;
433 u16 txseq;
434 u8 retries;
435 __le16 psm;
436 bdaddr_t bdaddr;
437 struct l2cap_chan *chan;
438};
439
440struct hci_dev;
441
442typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
443typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
444 u16 opcode, struct sk_buff *skb);
445
446void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
447 hci_req_complete_t *req_complete,
448 hci_req_complete_skb_t *req_complete_skb);
449
450#define HCI_REQ_START BIT(0)
451#define HCI_REQ_SKB BIT(1)
452
453struct hci_ctrl {
454 struct sock *sk;
455 u16 opcode;
456 u8 req_flags;
457 u8 req_event;
458 union {
459 hci_req_complete_t req_complete;
460 hci_req_complete_skb_t req_complete_skb;
461 };
462};
463
464struct mgmt_ctrl {
465 struct hci_dev *hdev;
466 u16 opcode;
467};
468
469struct bt_skb_cb {
470 u8 pkt_type;
471 u8 force_active;
472 u16 expect;
473 u8 incoming:1;
474 u8 pkt_status:2;
475 union {
476 struct l2cap_ctrl l2cap;
477 struct hci_ctrl hci;
478 struct mgmt_ctrl mgmt;
479 struct scm_creds creds;
480 };
481};
482#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
483
484#define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type
485#define hci_skb_pkt_status(skb) bt_cb((skb))->pkt_status
486#define hci_skb_expect(skb) bt_cb((skb))->expect
487#define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode
488#define hci_skb_event(skb) bt_cb((skb))->hci.req_event
489#define hci_skb_sk(skb) bt_cb((skb))->hci.sk
490
491static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
492{
493 struct sk_buff *skb;
494
495 skb = alloc_skb(len + BT_SKB_RESERVE, how);
496 if (skb)
497 skb_reserve(skb, BT_SKB_RESERVE);
498 return skb;
499}
500
501static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
502 unsigned long len, int nb, int *err)
503{
504 struct sk_buff *skb;
505
506 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
507 if (skb)
508 skb_reserve(skb, BT_SKB_RESERVE);
509
510 if (!skb && *err)
511 return NULL;
512
513 *err = sock_error(sk);
514 if (*err)
515 goto out;
516
517 if (sk->sk_shutdown) {
518 *err = -ECONNRESET;
519 goto out;
520 }
521
522 return skb;
523
524out:
525 kfree_skb(skb);
526 return NULL;
527}
528
529/* Shall not be called with lock_sock held */
530static inline struct sk_buff *bt_skb_sendmsg(struct sock *sk,
531 struct msghdr *msg,
532 size_t len, size_t mtu,
533 size_t headroom, size_t tailroom)
534{
535 struct sk_buff *skb;
536 size_t size = min_t(size_t, len, mtu);
537 int err;
538
539 skb = bt_skb_send_alloc(sk, size + headroom + tailroom,
540 msg->msg_flags & MSG_DONTWAIT, &err);
541 if (!skb)
542 return ERR_PTR(err);
543
544 skb_reserve(skb, headroom);
545 skb_tailroom_reserve(skb, mtu, tailroom);
546
547 if (!copy_from_iter_full(skb_put(skb, size), size, &msg->msg_iter)) {
548 kfree_skb(skb);
549 return ERR_PTR(-EFAULT);
550 }
551
552 skb->priority = READ_ONCE(sk->sk_priority);
553
554 return skb;
555}
556
557/* Similar to bt_skb_sendmsg but can split the msg into multiple fragments
558 * accourding to the MTU.
559 */
560static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk,
561 struct msghdr *msg,
562 size_t len, size_t mtu,
563 size_t headroom, size_t tailroom)
564{
565 struct sk_buff *skb, **frag;
566
567 skb = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
568 if (IS_ERR(skb))
569 return skb;
570
571 len -= skb->len;
572 if (!len)
573 return skb;
574
575 /* Add remaining data over MTU as continuation fragments */
576 frag = &skb_shinfo(skb)->frag_list;
577 while (len) {
578 struct sk_buff *tmp;
579
580 tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
581 if (IS_ERR(tmp)) {
582 return skb;
583 }
584
585 len -= tmp->len;
586
587 *frag = tmp;
588 frag = &(*frag)->next;
589 }
590
591 return skb;
592}
593
594int bt_to_errno(u16 code);
595__u8 bt_status(int err);
596
597void hci_sock_set_flag(struct sock *sk, int nr);
598void hci_sock_clear_flag(struct sock *sk, int nr);
599int hci_sock_test_flag(struct sock *sk, int nr);
600unsigned short hci_sock_get_channel(struct sock *sk);
601u32 hci_sock_get_cookie(struct sock *sk);
602
603int hci_sock_init(void);
604void hci_sock_cleanup(void);
605
606int bt_sysfs_init(void);
607void bt_sysfs_cleanup(void);
608
609int bt_procfs_init(struct net *net, const char *name,
610 struct bt_sock_list *sk_list,
611 int (*seq_show)(struct seq_file *, void *));
612void bt_procfs_cleanup(struct net *net, const char *name);
613
614extern struct dentry *bt_debugfs;
615
616int l2cap_init(void);
617void l2cap_exit(void);
618
619#if IS_ENABLED(CONFIG_BT_BREDR)
620int sco_init(void);
621void sco_exit(void);
622#else
623static inline int sco_init(void)
624{
625 return 0;
626}
627
628static inline void sco_exit(void)
629{
630}
631#endif
632
633#if IS_ENABLED(CONFIG_BT_LE)
634int iso_init(void);
635int iso_exit(void);
636bool iso_enabled(void);
637#else
638static inline int iso_init(void)
639{
640 return 0;
641}
642
643static inline int iso_exit(void)
644{
645 return 0;
646}
647
648static inline bool iso_enabled(void)
649{
650 return false;
651}
652#endif
653
654int mgmt_init(void);
655void mgmt_exit(void);
656void mgmt_cleanup(struct sock *sk);
657
658void bt_sock_reclassify_lock(struct sock *sk, int proto);
659
660#endif /* __BLUETOOTH_H */
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
67struct 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
85struct 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
119struct 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
166struct bt_iso_io_qos {
167 __u32 interval;
168 __u16 latency;
169 __u16 sdu;
170 __u8 phy;
171 __u8 rtn;
172};
173
174struct 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
201struct bt_codec_caps {
202 __u8 len;
203 __u8 data[];
204} __packed;
205
206struct bt_codec {
207 __u8 id;
208 __u16 cid;
209 __u16 vid;
210 __u8 data_path;
211 __u8 num_caps;
212} __packed;
213
214struct 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)
226void bt_info(const char *fmt, ...);
227__printf(1, 2)
228void bt_warn(const char *fmt, ...);
229__printf(1, 2)
230void bt_err(const char *fmt, ...);
231#if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
232void bt_dbg_set(bool enable);
233bool bt_dbg_get(void);
234__printf(1, 2)
235void bt_dbg(const char *fmt, ...);
236#endif
237__printf(1, 2)
238void bt_warn_ratelimited(const char *fmt, ...);
239__printf(1, 2)
240void 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 */
269enum {
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 */
282static 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 */
309typedef 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
318static 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
330static 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 */
345static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
346{
347 return memcmp(ba1, ba2, sizeof(bdaddr_t));
348}
349static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
350{
351 memcpy(dst, src, sizeof(bdaddr_t));
352}
353
354void 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
360struct 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
369enum {
370 BT_SK_DEFER_SETUP,
371 BT_SK_SUSPEND,
372};
373
374struct 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
382int bt_sock_register(int proto, const struct net_proto_family *ops);
383void bt_sock_unregister(int proto);
384void bt_sock_link(struct bt_sock_list *l, struct sock *s);
385void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
386int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
387 int flags);
388int 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);
391int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
392int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
393int bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags);
394
395void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh);
396void bt_accept_unlink(struct sock *sk);
397struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
398
399/* Skb helpers */
400struct 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
416struct sco_ctrl {
417 u8 pkt_status;
418};
419
420struct hci_dev;
421
422typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
423typedef 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
429struct 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
440struct mgmt_ctrl {
441 struct hci_dev *hdev;
442 u16 opcode;
443};
444
445struct 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
465static 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
475static 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
498out:
499 kfree_skb(skb);
500 return NULL;
501}
502
503/* Shall not be called with lock_sock held */
504static 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 */
534static 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
568int bt_to_errno(u16 code);
569__u8 bt_status(int err);
570
571void hci_sock_set_flag(struct sock *sk, int nr);
572void hci_sock_clear_flag(struct sock *sk, int nr);
573int hci_sock_test_flag(struct sock *sk, int nr);
574unsigned short hci_sock_get_channel(struct sock *sk);
575u32 hci_sock_get_cookie(struct sock *sk);
576
577int hci_sock_init(void);
578void hci_sock_cleanup(void);
579
580int bt_sysfs_init(void);
581void bt_sysfs_cleanup(void);
582
583int bt_procfs_init(struct net *net, const char *name,
584 struct bt_sock_list *sk_list,
585 int (*seq_show)(struct seq_file *, void *));
586void bt_procfs_cleanup(struct net *net, const char *name);
587
588extern struct dentry *bt_debugfs;
589
590int l2cap_init(void);
591void l2cap_exit(void);
592
593#if IS_ENABLED(CONFIG_BT_BREDR)
594int sco_init(void);
595void sco_exit(void);
596#else
597static inline int sco_init(void)
598{
599 return 0;
600}
601
602static inline void sco_exit(void)
603{
604}
605#endif
606
607#if IS_ENABLED(CONFIG_BT_LE)
608int iso_init(void);
609int iso_exit(void);
610bool iso_enabled(void);
611#else
612static inline int iso_init(void)
613{
614 return 0;
615}
616
617static inline int iso_exit(void)
618{
619 return 0;
620}
621
622static inline bool iso_enabled(void)
623{
624 return false;
625}
626#endif
627
628int mgmt_init(void);
629void mgmt_exit(void);
630void mgmt_cleanup(struct sock *sk);
631
632void bt_sock_reclassify_lock(struct sock *sk, int proto);
633
634#endif /* __BLUETOOTH_H */