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 |
68 | struct 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 |
86 | struct 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 |
120 | struct bt_voice { |
121 | __u16 setting; |
122 | }; |
123 | |
124 | #define BT_VOICE_TRANSPARENT 0x0003 |
125 | #define BT_VOICE_CVSD_16BIT 0x0060 |
126 | |
127 | #define BT_SNDMTU 12 |
128 | #define BT_RCVMTU 13 |
129 | #define BT_PHY 14 |
130 | |
131 | #define BT_PHY_BR_1M_1SLOT 0x00000001 |
132 | #define BT_PHY_BR_1M_3SLOT 0x00000002 |
133 | #define BT_PHY_BR_1M_5SLOT 0x00000004 |
134 | #define BT_PHY_EDR_2M_1SLOT 0x00000008 |
135 | #define BT_PHY_EDR_2M_3SLOT 0x00000010 |
136 | #define BT_PHY_EDR_2M_5SLOT 0x00000020 |
137 | #define BT_PHY_EDR_3M_1SLOT 0x00000040 |
138 | #define BT_PHY_EDR_3M_3SLOT 0x00000080 |
139 | #define BT_PHY_EDR_3M_5SLOT 0x00000100 |
140 | #define BT_PHY_LE_1M_TX 0x00000200 |
141 | #define BT_PHY_LE_1M_RX 0x00000400 |
142 | #define BT_PHY_LE_2M_TX 0x00000800 |
143 | #define BT_PHY_LE_2M_RX 0x00001000 |
144 | #define BT_PHY_LE_CODED_TX 0x00002000 |
145 | #define BT_PHY_LE_CODED_RX 0x00004000 |
146 | |
147 | #define BT_MODE 15 |
148 | |
149 | #define BT_MODE_BASIC 0x00 |
150 | #define BT_MODE_ERTM 0x01 |
151 | #define BT_MODE_STREAMING 0x02 |
152 | #define BT_MODE_LE_FLOWCTL 0x03 |
153 | #define BT_MODE_EXT_FLOWCTL 0x04 |
154 | |
155 | #define BT_PKT_STATUS 16 |
156 | |
157 | #define BT_SCM_PKT_STATUS 0x03 |
158 | |
159 | #define BT_ISO_QOS 17 |
160 | |
161 | #define BT_ISO_QOS_CIG_UNSET 0xff |
162 | #define BT_ISO_QOS_CIS_UNSET 0xff |
163 | |
164 | #define BT_ISO_QOS_BIG_UNSET 0xff |
165 | #define BT_ISO_QOS_BIS_UNSET 0xff |
166 | |
167 | #define BT_ISO_SYNC_TIMEOUT 0x07d0 /* 20 secs */ |
168 | |
169 | struct bt_iso_io_qos { |
170 | __u32 interval; |
171 | __u16 latency; |
172 | __u16 sdu; |
173 | __u8 phy; |
174 | __u8 rtn; |
175 | }; |
176 | |
177 | struct bt_iso_ucast_qos { |
178 | __u8 cig; |
179 | __u8 cis; |
180 | __u8 sca; |
181 | __u8 packing; |
182 | __u8 framing; |
183 | struct bt_iso_io_qos in; |
184 | struct bt_iso_io_qos out; |
185 | }; |
186 | |
187 | struct bt_iso_bcast_qos { |
188 | __u8 big; |
189 | __u8 bis; |
190 | __u8 sync_factor; |
191 | __u8 packing; |
192 | __u8 framing; |
193 | struct bt_iso_io_qos in; |
194 | struct bt_iso_io_qos out; |
195 | __u8 encryption; |
196 | __u8 bcode[16]; |
197 | __u8 options; |
198 | __u16 skip; |
199 | __u16 sync_timeout; |
200 | __u8 sync_cte_type; |
201 | __u8 mse; |
202 | __u16 timeout; |
203 | }; |
204 | |
205 | struct bt_iso_qos { |
206 | union { |
207 | struct bt_iso_ucast_qos ucast; |
208 | struct bt_iso_bcast_qos bcast; |
209 | }; |
210 | }; |
211 | |
212 | #define BT_ISO_PHY_1M 0x01 |
213 | #define BT_ISO_PHY_2M 0x02 |
214 | #define BT_ISO_PHY_CODED 0x04 |
215 | #define BT_ISO_PHY_ANY (BT_ISO_PHY_1M | BT_ISO_PHY_2M | \ |
216 | BT_ISO_PHY_CODED) |
217 | |
218 | #define BT_CODEC 19 |
219 | |
220 | struct bt_codec_caps { |
221 | __u8 len; |
222 | __u8 data[]; |
223 | } __packed; |
224 | |
225 | struct bt_codec { |
226 | __u8 id; |
227 | __u16 cid; |
228 | __u16 vid; |
229 | __u8 data_path; |
230 | __u8 num_caps; |
231 | } __packed; |
232 | |
233 | struct bt_codecs { |
234 | __u8 num_codecs; |
235 | struct bt_codec codecs[]; |
236 | } __packed; |
237 | |
238 | #define BT_CODEC_CVSD 0x02 |
239 | #define BT_CODEC_TRANSPARENT 0x03 |
240 | #define BT_CODEC_MSBC 0x05 |
241 | |
242 | #define BT_ISO_BASE 20 |
243 | |
244 | __printf(1, 2) |
245 | void bt_info(const char *fmt, ...); |
246 | __printf(1, 2) |
247 | void bt_warn(const char *fmt, ...); |
248 | __printf(1, 2) |
249 | void bt_err(const char *fmt, ...); |
250 | #if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG) |
251 | void bt_dbg_set(bool enable); |
252 | bool bt_dbg_get(void); |
253 | __printf(1, 2) |
254 | void bt_dbg(const char *fmt, ...); |
255 | #endif |
256 | __printf(1, 2) |
257 | void bt_warn_ratelimited(const char *fmt, ...); |
258 | __printf(1, 2) |
259 | void bt_err_ratelimited(const char *fmt, ...); |
260 | |
261 | #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__) |
262 | #define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__) |
263 | #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__) |
264 | |
265 | #if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG) |
266 | #define BT_DBG(fmt, ...) bt_dbg(fmt "\n", ##__VA_ARGS__) |
267 | #else |
268 | #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__) |
269 | #endif |
270 | |
271 | #define bt_dev_name(hdev) ((hdev) ? (hdev)->name : "null") |
272 | |
273 | #define bt_dev_info(hdev, fmt, ...) \ |
274 | BT_INFO("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) |
275 | #define bt_dev_warn(hdev, fmt, ...) \ |
276 | BT_WARN("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) |
277 | #define bt_dev_err(hdev, fmt, ...) \ |
278 | BT_ERR("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) |
279 | #define bt_dev_dbg(hdev, fmt, ...) \ |
280 | BT_DBG("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) |
281 | |
282 | #define bt_dev_warn_ratelimited(hdev, fmt, ...) \ |
283 | bt_warn_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) |
284 | #define bt_dev_err_ratelimited(hdev, fmt, ...) \ |
285 | bt_err_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__) |
286 | |
287 | /* Connection and socket states */ |
288 | enum { |
289 | BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ |
290 | BT_OPEN, |
291 | BT_BOUND, |
292 | BT_LISTEN, |
293 | BT_CONNECT, |
294 | BT_CONNECT2, |
295 | BT_CONFIG, |
296 | BT_DISCONN, |
297 | BT_CLOSED |
298 | }; |
299 | |
300 | /* If unused will be removed by compiler */ |
301 | static inline const char *state_to_string(int state) |
302 | { |
303 | switch (state) { |
304 | case BT_CONNECTED: |
305 | return "BT_CONNECTED" ; |
306 | case BT_OPEN: |
307 | return "BT_OPEN" ; |
308 | case BT_BOUND: |
309 | return "BT_BOUND" ; |
310 | case BT_LISTEN: |
311 | return "BT_LISTEN" ; |
312 | case BT_CONNECT: |
313 | return "BT_CONNECT" ; |
314 | case BT_CONNECT2: |
315 | return "BT_CONNECT2" ; |
316 | case BT_CONFIG: |
317 | return "BT_CONFIG" ; |
318 | case BT_DISCONN: |
319 | return "BT_DISCONN" ; |
320 | case BT_CLOSED: |
321 | return "BT_CLOSED" ; |
322 | } |
323 | |
324 | return "invalid state" ; |
325 | } |
326 | |
327 | /* BD Address */ |
328 | typedef struct { |
329 | __u8 b[6]; |
330 | } __packed bdaddr_t; |
331 | |
332 | /* BD Address type */ |
333 | #define BDADDR_BREDR 0x00 |
334 | #define BDADDR_LE_PUBLIC 0x01 |
335 | #define BDADDR_LE_RANDOM 0x02 |
336 | |
337 | static inline bool bdaddr_type_is_valid(u8 type) |
338 | { |
339 | switch (type) { |
340 | case BDADDR_BREDR: |
341 | case BDADDR_LE_PUBLIC: |
342 | case BDADDR_LE_RANDOM: |
343 | return true; |
344 | } |
345 | |
346 | return false; |
347 | } |
348 | |
349 | static inline bool bdaddr_type_is_le(u8 type) |
350 | { |
351 | switch (type) { |
352 | case BDADDR_LE_PUBLIC: |
353 | case BDADDR_LE_RANDOM: |
354 | return true; |
355 | } |
356 | |
357 | return false; |
358 | } |
359 | |
360 | #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}}) |
361 | #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}) |
362 | |
363 | /* Copy, swap, convert BD Address */ |
364 | static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) |
365 | { |
366 | return memcmp(p: ba1, q: ba2, size: sizeof(bdaddr_t)); |
367 | } |
368 | static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src) |
369 | { |
370 | memcpy(dst, src, sizeof(bdaddr_t)); |
371 | } |
372 | |
373 | void baswap(bdaddr_t *dst, const bdaddr_t *src); |
374 | |
375 | /* Common socket structures and functions */ |
376 | |
377 | #define bt_sk(__sk) ((struct bt_sock *) __sk) |
378 | |
379 | struct bt_sock { |
380 | struct sock sk; |
381 | struct list_head accept_q; |
382 | struct sock *parent; |
383 | unsigned long flags; |
384 | void (*skb_msg_name)(struct sk_buff *, void *, int *); |
385 | void (*skb_put_cmsg)(struct sk_buff *, struct msghdr *, struct sock *); |
386 | }; |
387 | |
388 | enum { |
389 | BT_SK_DEFER_SETUP, |
390 | BT_SK_SUSPEND, |
391 | BT_SK_PKT_STATUS |
392 | }; |
393 | |
394 | struct bt_sock_list { |
395 | struct hlist_head head; |
396 | rwlock_t lock; |
397 | #ifdef CONFIG_PROC_FS |
398 | int (* custom_seq_show)(struct seq_file *, void *); |
399 | #endif |
400 | }; |
401 | |
402 | int bt_sock_register(int proto, const struct net_proto_family *ops); |
403 | void bt_sock_unregister(int proto); |
404 | void bt_sock_link(struct bt_sock_list *l, struct sock *s); |
405 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); |
406 | struct sock *bt_sock_alloc(struct net *net, struct socket *sock, |
407 | struct proto *prot, int proto, gfp_t prio, int kern); |
408 | int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
409 | int flags); |
410 | int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, |
411 | size_t len, int flags); |
412 | __poll_t bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); |
413 | int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); |
414 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); |
415 | int bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags); |
416 | |
417 | void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh); |
418 | void bt_accept_unlink(struct sock *sk); |
419 | struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); |
420 | |
421 | /* Skb helpers */ |
422 | struct l2cap_ctrl { |
423 | u8 sframe:1, |
424 | poll:1, |
425 | final:1, |
426 | fcs:1, |
427 | sar:2, |
428 | super:2; |
429 | |
430 | u16 reqseq; |
431 | u16 txseq; |
432 | u8 retries; |
433 | __le16 psm; |
434 | bdaddr_t bdaddr; |
435 | struct l2cap_chan *chan; |
436 | }; |
437 | |
438 | struct hci_dev; |
439 | |
440 | typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode); |
441 | typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status, |
442 | u16 opcode, struct sk_buff *skb); |
443 | |
444 | #define HCI_REQ_START BIT(0) |
445 | #define HCI_REQ_SKB BIT(1) |
446 | |
447 | struct hci_ctrl { |
448 | struct sock *sk; |
449 | u16 opcode; |
450 | u8 req_flags; |
451 | u8 req_event; |
452 | union { |
453 | hci_req_complete_t req_complete; |
454 | hci_req_complete_skb_t req_complete_skb; |
455 | }; |
456 | }; |
457 | |
458 | struct mgmt_ctrl { |
459 | struct hci_dev *hdev; |
460 | u16 opcode; |
461 | }; |
462 | |
463 | struct bt_skb_cb { |
464 | u8 pkt_type; |
465 | u8 force_active; |
466 | u16 expect; |
467 | u8 incoming:1; |
468 | u8 pkt_status:2; |
469 | union { |
470 | struct l2cap_ctrl l2cap; |
471 | struct hci_ctrl hci; |
472 | struct mgmt_ctrl mgmt; |
473 | struct scm_creds creds; |
474 | }; |
475 | }; |
476 | #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) |
477 | |
478 | #define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type |
479 | #define hci_skb_pkt_status(skb) bt_cb((skb))->pkt_status |
480 | #define hci_skb_expect(skb) bt_cb((skb))->expect |
481 | #define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode |
482 | #define hci_skb_event(skb) bt_cb((skb))->hci.req_event |
483 | #define hci_skb_sk(skb) bt_cb((skb))->hci.sk |
484 | |
485 | static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) |
486 | { |
487 | struct sk_buff *skb; |
488 | |
489 | skb = alloc_skb(size: len + BT_SKB_RESERVE, priority: how); |
490 | if (skb) |
491 | skb_reserve(skb, BT_SKB_RESERVE); |
492 | return skb; |
493 | } |
494 | |
495 | static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, |
496 | unsigned long len, int nb, int *err) |
497 | { |
498 | struct sk_buff *skb; |
499 | |
500 | skb = sock_alloc_send_skb(sk, size: len + BT_SKB_RESERVE, noblock: nb, errcode: err); |
501 | if (skb) |
502 | skb_reserve(skb, BT_SKB_RESERVE); |
503 | |
504 | if (!skb && *err) |
505 | return NULL; |
506 | |
507 | *err = sock_error(sk); |
508 | if (*err) |
509 | goto out; |
510 | |
511 | if (sk->sk_shutdown) { |
512 | *err = -ECONNRESET; |
513 | goto out; |
514 | } |
515 | |
516 | return skb; |
517 | |
518 | out: |
519 | kfree_skb(skb); |
520 | return NULL; |
521 | } |
522 | |
523 | /* Shall not be called with lock_sock held */ |
524 | static inline struct sk_buff *bt_skb_sendmsg(struct sock *sk, |
525 | struct msghdr *msg, |
526 | size_t len, size_t mtu, |
527 | size_t headroom, size_t tailroom) |
528 | { |
529 | struct sk_buff *skb; |
530 | size_t size = min_t(size_t, len, mtu); |
531 | int err; |
532 | |
533 | skb = bt_skb_send_alloc(sk, len: size + headroom + tailroom, |
534 | nb: msg->msg_flags & MSG_DONTWAIT, err: &err); |
535 | if (!skb) |
536 | return ERR_PTR(error: err); |
537 | |
538 | skb_reserve(skb, len: headroom); |
539 | skb_tailroom_reserve(skb, mtu, needed_tailroom: tailroom); |
540 | |
541 | if (!copy_from_iter_full(addr: skb_put(skb, len: size), bytes: size, i: &msg->msg_iter)) { |
542 | kfree_skb(skb); |
543 | return ERR_PTR(error: -EFAULT); |
544 | } |
545 | |
546 | skb->priority = READ_ONCE(sk->sk_priority); |
547 | |
548 | return skb; |
549 | } |
550 | |
551 | /* Similar to bt_skb_sendmsg but can split the msg into multiple fragments |
552 | * accourding to the MTU. |
553 | */ |
554 | static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk, |
555 | struct msghdr *msg, |
556 | size_t len, size_t mtu, |
557 | size_t headroom, size_t tailroom) |
558 | { |
559 | struct sk_buff *skb, **frag; |
560 | |
561 | skb = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom); |
562 | if (IS_ERR(ptr: skb)) |
563 | return skb; |
564 | |
565 | len -= skb->len; |
566 | if (!len) |
567 | return skb; |
568 | |
569 | /* Add remaining data over MTU as continuation fragments */ |
570 | frag = &skb_shinfo(skb)->frag_list; |
571 | while (len) { |
572 | struct sk_buff *tmp; |
573 | |
574 | tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom); |
575 | if (IS_ERR(ptr: tmp)) { |
576 | return skb; |
577 | } |
578 | |
579 | len -= tmp->len; |
580 | |
581 | *frag = tmp; |
582 | frag = &(*frag)->next; |
583 | } |
584 | |
585 | return skb; |
586 | } |
587 | |
588 | static inline int bt_copy_from_sockptr(void *dst, size_t dst_size, |
589 | sockptr_t src, size_t src_size) |
590 | { |
591 | if (dst_size > src_size) |
592 | return -EINVAL; |
593 | |
594 | return copy_from_sockptr(dst, src, size: dst_size); |
595 | } |
596 | |
597 | int bt_to_errno(u16 code); |
598 | __u8 bt_status(int err); |
599 | |
600 | void hci_sock_set_flag(struct sock *sk, int nr); |
601 | void hci_sock_clear_flag(struct sock *sk, int nr); |
602 | int hci_sock_test_flag(struct sock *sk, int nr); |
603 | unsigned short hci_sock_get_channel(struct sock *sk); |
604 | u32 hci_sock_get_cookie(struct sock *sk); |
605 | |
606 | int hci_sock_init(void); |
607 | void hci_sock_cleanup(void); |
608 | |
609 | int bt_sysfs_init(void); |
610 | void bt_sysfs_cleanup(void); |
611 | |
612 | int bt_procfs_init(struct net *net, const char *name, |
613 | struct bt_sock_list *sk_list, |
614 | int (*seq_show)(struct seq_file *, void *)); |
615 | void bt_procfs_cleanup(struct net *net, const char *name); |
616 | |
617 | extern struct dentry *bt_debugfs; |
618 | |
619 | int l2cap_init(void); |
620 | void l2cap_exit(void); |
621 | |
622 | #if IS_ENABLED(CONFIG_BT_BREDR) |
623 | int sco_init(void); |
624 | void sco_exit(void); |
625 | #else |
626 | static inline int sco_init(void) |
627 | { |
628 | return 0; |
629 | } |
630 | |
631 | static inline void sco_exit(void) |
632 | { |
633 | } |
634 | #endif |
635 | |
636 | #if IS_ENABLED(CONFIG_BT_LE) |
637 | int iso_init(void); |
638 | int iso_exit(void); |
639 | bool iso_enabled(void); |
640 | #else |
641 | static inline int iso_init(void) |
642 | { |
643 | return 0; |
644 | } |
645 | |
646 | static inline int iso_exit(void) |
647 | { |
648 | return 0; |
649 | } |
650 | |
651 | static inline bool iso_enabled(void) |
652 | { |
653 | return false; |
654 | } |
655 | #endif |
656 | |
657 | int mgmt_init(void); |
658 | void mgmt_exit(void); |
659 | void mgmt_cleanup(struct sock *sk); |
660 | |
661 | void bt_sock_reclassify_lock(struct sock *sk, int proto); |
662 | |
663 | #endif /* __BLUETOOTH_H */ |
664 | |