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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 <asm/types.h>
29#include <asm/byteorder.h>
30#include <linux/list.h>
31#include <linux/poll.h>
32#include <net/sock.h>
33
34#ifndef AF_BLUETOOTH
35#define AF_BLUETOOTH 31
36#define PF_BLUETOOTH AF_BLUETOOTH
37#endif
38
39/* Reserv for core and drivers use */
40#define BT_SKB_RESERVE 8
41
42#define BTPROTO_L2CAP 0
43#define BTPROTO_HCI 1
44#define BTPROTO_SCO 2
45#define BTPROTO_RFCOMM 3
46#define BTPROTO_BNEP 4
47#define BTPROTO_CMTP 5
48#define BTPROTO_HIDP 6
49#define BTPROTO_AVDTP 7
50
51#define SOL_HCI 0
52#define SOL_L2CAP 6
53#define SOL_SCO 17
54#define SOL_RFCOMM 18
55
56#define BT_SECURITY 4
57struct bt_security {
58 __u8 level;
59 __u8 key_size;
60};
61#define BT_SECURITY_SDP 0
62#define BT_SECURITY_LOW 1
63#define BT_SECURITY_MEDIUM 2
64#define BT_SECURITY_HIGH 3
65
66#define BT_DEFER_SETUP 7
67
68#define BT_FLUSHABLE 8
69
70#define BT_FLUSHABLE_OFF 0
71#define BT_FLUSHABLE_ON 1
72
73#define BT_POWER 9
74struct bt_power {
75 __u8 force_active;
76};
77#define BT_POWER_FORCE_ACTIVE_OFF 0
78#define BT_POWER_FORCE_ACTIVE_ON 1
79
80__attribute__((format (printf, 2, 3)))
81int bt_printk(const char *level, const char *fmt, ...);
82
83#define BT_INFO(fmt, arg...) bt_printk(KERN_INFO, pr_fmt(fmt), ##arg)
84#define BT_ERR(fmt, arg...) bt_printk(KERN_ERR, pr_fmt(fmt), ##arg)
85#define BT_DBG(fmt, arg...) pr_debug(fmt "\n", ##arg)
86
87/* Connection and socket states */
88enum {
89 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
90 BT_OPEN,
91 BT_BOUND,
92 BT_LISTEN,
93 BT_CONNECT,
94 BT_CONNECT2,
95 BT_CONFIG,
96 BT_DISCONN,
97 BT_CLOSED
98};
99
100/* BD Address */
101typedef struct {
102 __u8 b[6];
103} __packed bdaddr_t;
104
105#define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
106#define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff}})
107
108/* Copy, swap, convert BD Address */
109static inline int bacmp(bdaddr_t *ba1, bdaddr_t *ba2)
110{
111 return memcmp(ba1, ba2, sizeof(bdaddr_t));
112}
113static inline void bacpy(bdaddr_t *dst, bdaddr_t *src)
114{
115 memcpy(dst, src, sizeof(bdaddr_t));
116}
117
118void baswap(bdaddr_t *dst, bdaddr_t *src);
119char *batostr(bdaddr_t *ba);
120bdaddr_t *strtoba(char *str);
121
122/* Common socket structures and functions */
123
124#define bt_sk(__sk) ((struct bt_sock *) __sk)
125
126struct bt_sock {
127 struct sock sk;
128 bdaddr_t src;
129 bdaddr_t dst;
130 struct list_head accept_q;
131 struct sock *parent;
132 u32 defer_setup;
133};
134
135struct bt_sock_list {
136 struct hlist_head head;
137 rwlock_t lock;
138};
139
140int bt_sock_register(int proto, const struct net_proto_family *ops);
141int bt_sock_unregister(int proto);
142void bt_sock_link(struct bt_sock_list *l, struct sock *s);
143void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
144int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
145 struct msghdr *msg, size_t len, int flags);
146int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
147 struct msghdr *msg, size_t len, int flags);
148uint bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait);
149int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
150int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
151
152void bt_accept_enqueue(struct sock *parent, struct sock *sk);
153void bt_accept_unlink(struct sock *sk);
154struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
155
156/* Skb helpers */
157struct bt_skb_cb {
158 __u8 pkt_type;
159 __u8 incoming;
160 __u16 expect;
161 __u8 tx_seq;
162 __u8 retries;
163 __u8 sar;
164 unsigned short channel;
165 __u8 force_active;
166};
167#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
168
169static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
170{
171 struct sk_buff *skb;
172
173 if ((skb = alloc_skb(len + BT_SKB_RESERVE, how))) {
174 skb_reserve(skb, BT_SKB_RESERVE);
175 bt_cb(skb)->incoming = 0;
176 }
177 return skb;
178}
179
180static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
181 unsigned long len, int nb, int *err)
182{
183 struct sk_buff *skb;
184
185 release_sock(sk);
186 if ((skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err))) {
187 skb_reserve(skb, BT_SKB_RESERVE);
188 bt_cb(skb)->incoming = 0;
189 }
190 lock_sock(sk);
191
192 if (!skb && *err)
193 return NULL;
194
195 *err = sock_error(sk);
196 if (*err)
197 goto out;
198
199 if (sk->sk_shutdown) {
200 *err = -ECONNRESET;
201 goto out;
202 }
203
204 return skb;
205
206out:
207 kfree_skb(skb);
208 return NULL;
209}
210
211int bt_to_errno(__u16 code);
212
213extern int hci_sock_init(void);
214extern void hci_sock_cleanup(void);
215
216extern int bt_sysfs_init(void);
217extern void bt_sysfs_cleanup(void);
218
219extern struct dentry *bt_debugfs;
220
221#ifdef CONFIG_BT_L2CAP
222int l2cap_init(void);
223void l2cap_exit(void);
224#else
225static inline int l2cap_init(void)
226{
227 return 0;
228}
229
230static inline void l2cap_exit(void)
231{
232}
233#endif
234
235#ifdef CONFIG_BT_SCO
236int sco_init(void);
237void sco_exit(void);
238#else
239static inline int sco_init(void)
240{
241 return 0;
242}
243
244static inline void sco_exit(void)
245{
246}
247#endif
248
249#endif /* __BLUETOOTH_H */
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
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
167struct bt_iso_io_qos {
168 __u32 interval;
169 __u16 latency;
170 __u16 sdu;
171 __u8 phy;
172 __u8 rtn;
173};
174
175struct bt_iso_ucast_qos {
176 __u8 cig;
177 __u8 cis;
178 __u8 sca;
179 __u8 packing;
180 __u8 framing;
181 struct bt_iso_io_qos in;
182 struct bt_iso_io_qos out;
183};
184
185struct bt_iso_bcast_qos {
186 __u8 big;
187 __u8 bis;
188 __u8 sync_factor;
189 __u8 packing;
190 __u8 framing;
191 struct bt_iso_io_qos in;
192 struct bt_iso_io_qos out;
193 __u8 encryption;
194 __u8 bcode[16];
195 __u8 options;
196 __u16 skip;
197 __u16 sync_timeout;
198 __u8 sync_cte_type;
199 __u8 mse;
200 __u16 timeout;
201};
202
203struct bt_iso_qos {
204 union {
205 struct bt_iso_ucast_qos ucast;
206 struct bt_iso_bcast_qos bcast;
207 };
208};
209
210#define BT_ISO_PHY_1M 0x01
211#define BT_ISO_PHY_2M 0x02
212#define BT_ISO_PHY_CODED 0x04
213#define BT_ISO_PHY_ANY (BT_ISO_PHY_1M | BT_ISO_PHY_2M | \
214 BT_ISO_PHY_CODED)
215
216#define BT_CODEC 19
217
218struct bt_codec_caps {
219 __u8 len;
220 __u8 data[];
221} __packed;
222
223struct bt_codec {
224 __u8 id;
225 __u16 cid;
226 __u16 vid;
227 __u8 data_path;
228 __u8 num_caps;
229} __packed;
230
231struct bt_codecs {
232 __u8 num_codecs;
233 struct bt_codec codecs[];
234} __packed;
235
236#define BT_CODEC_CVSD 0x02
237#define BT_CODEC_TRANSPARENT 0x03
238#define BT_CODEC_MSBC 0x05
239
240#define BT_ISO_BASE 20
241
242__printf(1, 2)
243void bt_info(const char *fmt, ...);
244__printf(1, 2)
245void bt_warn(const char *fmt, ...);
246__printf(1, 2)
247void bt_err(const char *fmt, ...);
248#if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
249void bt_dbg_set(bool enable);
250bool bt_dbg_get(void);
251__printf(1, 2)
252void bt_dbg(const char *fmt, ...);
253#endif
254__printf(1, 2)
255void bt_warn_ratelimited(const char *fmt, ...);
256__printf(1, 2)
257void bt_err_ratelimited(const char *fmt, ...);
258
259#define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
260#define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__)
261#define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
262
263#if IS_ENABLED(CONFIG_BT_FEATURE_DEBUG)
264#define BT_DBG(fmt, ...) bt_dbg(fmt "\n", ##__VA_ARGS__)
265#else
266#define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
267#endif
268
269#define bt_dev_name(hdev) ((hdev) ? (hdev)->name : "null")
270
271#define bt_dev_info(hdev, fmt, ...) \
272 BT_INFO("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
273#define bt_dev_warn(hdev, fmt, ...) \
274 BT_WARN("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
275#define bt_dev_err(hdev, fmt, ...) \
276 BT_ERR("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
277#define bt_dev_dbg(hdev, fmt, ...) \
278 BT_DBG("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
279
280#define bt_dev_warn_ratelimited(hdev, fmt, ...) \
281 bt_warn_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
282#define bt_dev_err_ratelimited(hdev, fmt, ...) \
283 bt_err_ratelimited("%s: " fmt, bt_dev_name(hdev), ##__VA_ARGS__)
284
285/* Connection and socket states */
286enum {
287 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
288 BT_OPEN,
289 BT_BOUND,
290 BT_LISTEN,
291 BT_CONNECT,
292 BT_CONNECT2,
293 BT_CONFIG,
294 BT_DISCONN,
295 BT_CLOSED
296};
297
298/* If unused will be removed by compiler */
299static inline const char *state_to_string(int state)
300{
301 switch (state) {
302 case BT_CONNECTED:
303 return "BT_CONNECTED";
304 case BT_OPEN:
305 return "BT_OPEN";
306 case BT_BOUND:
307 return "BT_BOUND";
308 case BT_LISTEN:
309 return "BT_LISTEN";
310 case BT_CONNECT:
311 return "BT_CONNECT";
312 case BT_CONNECT2:
313 return "BT_CONNECT2";
314 case BT_CONFIG:
315 return "BT_CONFIG";
316 case BT_DISCONN:
317 return "BT_DISCONN";
318 case BT_CLOSED:
319 return "BT_CLOSED";
320 }
321
322 return "invalid state";
323}
324
325/* BD Address */
326typedef struct {
327 __u8 b[6];
328} __packed bdaddr_t;
329
330/* BD Address type */
331#define BDADDR_BREDR 0x00
332#define BDADDR_LE_PUBLIC 0x01
333#define BDADDR_LE_RANDOM 0x02
334
335static inline bool bdaddr_type_is_valid(u8 type)
336{
337 switch (type) {
338 case BDADDR_BREDR:
339 case BDADDR_LE_PUBLIC:
340 case BDADDR_LE_RANDOM:
341 return true;
342 }
343
344 return false;
345}
346
347static inline bool bdaddr_type_is_le(u8 type)
348{
349 switch (type) {
350 case BDADDR_LE_PUBLIC:
351 case BDADDR_LE_RANDOM:
352 return true;
353 }
354
355 return false;
356}
357
358#define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
359#define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}})
360
361/* Copy, swap, convert BD Address */
362static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
363{
364 return memcmp(ba1, ba2, sizeof(bdaddr_t));
365}
366static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
367{
368 memcpy(dst, src, sizeof(bdaddr_t));
369}
370
371void baswap(bdaddr_t *dst, const bdaddr_t *src);
372
373/* Common socket structures and functions */
374
375#define bt_sk(__sk) ((struct bt_sock *) __sk)
376
377struct bt_sock {
378 struct sock sk;
379 struct list_head accept_q;
380 struct sock *parent;
381 unsigned long flags;
382 void (*skb_msg_name)(struct sk_buff *, void *, int *);
383 void (*skb_put_cmsg)(struct sk_buff *, struct msghdr *, struct sock *);
384};
385
386enum {
387 BT_SK_DEFER_SETUP,
388 BT_SK_SUSPEND,
389 BT_SK_PKT_STATUS
390};
391
392struct bt_sock_list {
393 struct hlist_head head;
394 rwlock_t lock;
395#ifdef CONFIG_PROC_FS
396 int (* custom_seq_show)(struct seq_file *, void *);
397#endif
398};
399
400int bt_sock_register(int proto, const struct net_proto_family *ops);
401void bt_sock_unregister(int proto);
402void bt_sock_link(struct bt_sock_list *l, struct sock *s);
403void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
404struct sock *bt_sock_alloc(struct net *net, struct socket *sock,
405 struct proto *prot, int proto, gfp_t prio, int kern);
406int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
407 int flags);
408int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
409 size_t len, int flags);
410__poll_t bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
411int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
412int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
413int bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags);
414
415void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh);
416void bt_accept_unlink(struct sock *sk);
417struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
418
419/* Skb helpers */
420struct l2cap_ctrl {
421 u8 sframe:1,
422 poll:1,
423 final:1,
424 fcs:1,
425 sar:2,
426 super:2;
427
428 u16 reqseq;
429 u16 txseq;
430 u8 retries;
431 __le16 psm;
432 bdaddr_t bdaddr;
433 struct l2cap_chan *chan;
434};
435
436struct hci_dev;
437
438typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
439typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
440 u16 opcode, struct sk_buff *skb);
441
442#define HCI_REQ_START BIT(0)
443#define HCI_REQ_SKB BIT(1)
444
445struct hci_ctrl {
446 struct sock *sk;
447 u16 opcode;
448 u8 req_flags;
449 u8 req_event;
450 union {
451 hci_req_complete_t req_complete;
452 hci_req_complete_skb_t req_complete_skb;
453 };
454};
455
456struct mgmt_ctrl {
457 struct hci_dev *hdev;
458 u16 opcode;
459};
460
461struct bt_skb_cb {
462 u8 pkt_type;
463 u8 force_active;
464 u16 expect;
465 u8 incoming:1;
466 u8 pkt_status:2;
467 union {
468 struct l2cap_ctrl l2cap;
469 struct hci_ctrl hci;
470 struct mgmt_ctrl mgmt;
471 struct scm_creds creds;
472 };
473};
474#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
475
476#define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type
477#define hci_skb_pkt_status(skb) bt_cb((skb))->pkt_status
478#define hci_skb_expect(skb) bt_cb((skb))->expect
479#define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode
480#define hci_skb_event(skb) bt_cb((skb))->hci.req_event
481#define hci_skb_sk(skb) bt_cb((skb))->hci.sk
482
483static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
484{
485 struct sk_buff *skb;
486
487 skb = alloc_skb(len + BT_SKB_RESERVE, how);
488 if (skb)
489 skb_reserve(skb, BT_SKB_RESERVE);
490 return skb;
491}
492
493static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
494 unsigned long len, int nb, int *err)
495{
496 struct sk_buff *skb;
497
498 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
499 if (skb)
500 skb_reserve(skb, BT_SKB_RESERVE);
501
502 if (!skb && *err)
503 return NULL;
504
505 *err = sock_error(sk);
506 if (*err)
507 goto out;
508
509 if (sk->sk_shutdown) {
510 *err = -ECONNRESET;
511 goto out;
512 }
513
514 return skb;
515
516out:
517 kfree_skb(skb);
518 return NULL;
519}
520
521/* Shall not be called with lock_sock held */
522static inline struct sk_buff *bt_skb_sendmsg(struct sock *sk,
523 struct msghdr *msg,
524 size_t len, size_t mtu,
525 size_t headroom, size_t tailroom)
526{
527 struct sk_buff *skb;
528 size_t size = min_t(size_t, len, mtu);
529 int err;
530
531 skb = bt_skb_send_alloc(sk, size + headroom + tailroom,
532 msg->msg_flags & MSG_DONTWAIT, &err);
533 if (!skb)
534 return ERR_PTR(err);
535
536 skb_reserve(skb, headroom);
537 skb_tailroom_reserve(skb, mtu, tailroom);
538
539 if (!copy_from_iter_full(skb_put(skb, size), size, &msg->msg_iter)) {
540 kfree_skb(skb);
541 return ERR_PTR(-EFAULT);
542 }
543
544 skb->priority = READ_ONCE(sk->sk_priority);
545
546 return skb;
547}
548
549/* Similar to bt_skb_sendmsg but can split the msg into multiple fragments
550 * accourding to the MTU.
551 */
552static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk,
553 struct msghdr *msg,
554 size_t len, size_t mtu,
555 size_t headroom, size_t tailroom)
556{
557 struct sk_buff *skb, **frag;
558
559 skb = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
560 if (IS_ERR(skb))
561 return skb;
562
563 len -= skb->len;
564 if (!len)
565 return skb;
566
567 /* Add remaining data over MTU as continuation fragments */
568 frag = &skb_shinfo(skb)->frag_list;
569 while (len) {
570 struct sk_buff *tmp;
571
572 tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
573 if (IS_ERR(tmp)) {
574 return skb;
575 }
576
577 len -= tmp->len;
578
579 *frag = tmp;
580 frag = &(*frag)->next;
581 }
582
583 return skb;
584}
585
586int bt_to_errno(u16 code);
587__u8 bt_status(int err);
588
589void hci_sock_set_flag(struct sock *sk, int nr);
590void hci_sock_clear_flag(struct sock *sk, int nr);
591int hci_sock_test_flag(struct sock *sk, int nr);
592unsigned short hci_sock_get_channel(struct sock *sk);
593u32 hci_sock_get_cookie(struct sock *sk);
594
595int hci_sock_init(void);
596void hci_sock_cleanup(void);
597
598int bt_sysfs_init(void);
599void bt_sysfs_cleanup(void);
600
601int bt_procfs_init(struct net *net, const char *name,
602 struct bt_sock_list *sk_list,
603 int (*seq_show)(struct seq_file *, void *));
604void bt_procfs_cleanup(struct net *net, const char *name);
605
606extern struct dentry *bt_debugfs;
607
608int l2cap_init(void);
609void l2cap_exit(void);
610
611#if IS_ENABLED(CONFIG_BT_BREDR)
612int sco_init(void);
613void sco_exit(void);
614#else
615static inline int sco_init(void)
616{
617 return 0;
618}
619
620static inline void sco_exit(void)
621{
622}
623#endif
624
625#if IS_ENABLED(CONFIG_BT_LE)
626int iso_init(void);
627int iso_exit(void);
628bool iso_enabled(void);
629#else
630static inline int iso_init(void)
631{
632 return 0;
633}
634
635static inline int iso_exit(void)
636{
637 return 0;
638}
639
640static inline bool iso_enabled(void)
641{
642 return false;
643}
644#endif
645
646int mgmt_init(void);
647void mgmt_exit(void);
648void mgmt_cleanup(struct sock *sk);
649
650void bt_sock_reclassify_lock(struct sock *sk, int proto);
651
652#endif /* __BLUETOOTH_H */