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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 <linux/poll.h>
29#include <net/sock.h>
30#include <linux/seq_file.h>
31
32#define BT_SUBSYS_VERSION "2.21"
33
34#ifndef AF_BLUETOOTH
35#define AF_BLUETOOTH 31
36#define PF_BLUETOOTH AF_BLUETOOTH
37#endif
38
39/* Bluetooth versions */
40#define BLUETOOTH_VER_1_1 1
41#define BLUETOOTH_VER_1_2 2
42#define BLUETOOTH_VER_2_0 3
43
44/* Reserv for core and drivers use */
45#define BT_SKB_RESERVE 8
46
47#define BTPROTO_L2CAP 0
48#define BTPROTO_HCI 1
49#define BTPROTO_SCO 2
50#define BTPROTO_RFCOMM 3
51#define BTPROTO_BNEP 4
52#define BTPROTO_CMTP 5
53#define BTPROTO_HIDP 6
54#define BTPROTO_AVDTP 7
55
56#define SOL_HCI 0
57#define SOL_L2CAP 6
58#define SOL_SCO 17
59#define SOL_RFCOMM 18
60
61#define BT_SECURITY 4
62struct bt_security {
63 __u8 level;
64 __u8 key_size;
65};
66#define BT_SECURITY_SDP 0
67#define BT_SECURITY_LOW 1
68#define BT_SECURITY_MEDIUM 2
69#define BT_SECURITY_HIGH 3
70#define BT_SECURITY_FIPS 4
71
72#define BT_DEFER_SETUP 7
73
74#define BT_FLUSHABLE 8
75
76#define BT_FLUSHABLE_OFF 0
77#define BT_FLUSHABLE_ON 1
78
79#define BT_POWER 9
80struct bt_power {
81 __u8 force_active;
82};
83#define BT_POWER_FORCE_ACTIVE_OFF 0
84#define BT_POWER_FORCE_ACTIVE_ON 1
85
86#define BT_CHANNEL_POLICY 10
87
88/* BR/EDR only (default policy)
89 * AMP controllers cannot be used.
90 * Channel move requests from the remote device are denied.
91 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
92 */
93#define BT_CHANNEL_POLICY_BREDR_ONLY 0
94
95/* BR/EDR Preferred
96 * Allow use of AMP controllers.
97 * If the L2CAP channel is currently on AMP, move it to BR/EDR.
98 * Channel move requests from the remote device are allowed.
99 */
100#define BT_CHANNEL_POLICY_BREDR_PREFERRED 1
101
102/* AMP Preferred
103 * Allow use of AMP controllers
104 * If the L2CAP channel is currently on BR/EDR and AMP controller
105 * resources are available, initiate a channel move to AMP.
106 * Channel move requests from the remote device are allowed.
107 * If the L2CAP socket has not been connected yet, try to create
108 * and configure the channel directly on an AMP controller rather
109 * than BR/EDR.
110 */
111#define BT_CHANNEL_POLICY_AMP_PREFERRED 2
112
113#define BT_VOICE 11
114struct bt_voice {
115 __u16 setting;
116};
117
118#define BT_VOICE_TRANSPARENT 0x0003
119#define BT_VOICE_CVSD_16BIT 0x0060
120
121#define BT_SNDMTU 12
122#define BT_RCVMTU 13
123
124__printf(1, 2)
125void bt_info(const char *fmt, ...);
126__printf(1, 2)
127void bt_warn(const char *fmt, ...);
128__printf(1, 2)
129void bt_err(const char *fmt, ...);
130__printf(1, 2)
131void bt_err_ratelimited(const char *fmt, ...);
132
133#define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
134#define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__)
135#define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
136#define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
137
138#define BT_ERR_RATELIMITED(fmt, ...) bt_err_ratelimited(fmt "\n", ##__VA_ARGS__)
139
140#define bt_dev_info(hdev, fmt, ...) \
141 BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
142#define bt_dev_warn(hdev, fmt, ...) \
143 BT_WARN("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
144#define bt_dev_err(hdev, fmt, ...) \
145 BT_ERR("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
146#define bt_dev_dbg(hdev, fmt, ...) \
147 BT_DBG("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
148
149/* Connection and socket states */
150enum {
151 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
152 BT_OPEN,
153 BT_BOUND,
154 BT_LISTEN,
155 BT_CONNECT,
156 BT_CONNECT2,
157 BT_CONFIG,
158 BT_DISCONN,
159 BT_CLOSED
160};
161
162/* If unused will be removed by compiler */
163static inline const char *state_to_string(int state)
164{
165 switch (state) {
166 case BT_CONNECTED:
167 return "BT_CONNECTED";
168 case BT_OPEN:
169 return "BT_OPEN";
170 case BT_BOUND:
171 return "BT_BOUND";
172 case BT_LISTEN:
173 return "BT_LISTEN";
174 case BT_CONNECT:
175 return "BT_CONNECT";
176 case BT_CONNECT2:
177 return "BT_CONNECT2";
178 case BT_CONFIG:
179 return "BT_CONFIG";
180 case BT_DISCONN:
181 return "BT_DISCONN";
182 case BT_CLOSED:
183 return "BT_CLOSED";
184 }
185
186 return "invalid state";
187}
188
189/* BD Address */
190typedef struct {
191 __u8 b[6];
192} __packed bdaddr_t;
193
194/* BD Address type */
195#define BDADDR_BREDR 0x00
196#define BDADDR_LE_PUBLIC 0x01
197#define BDADDR_LE_RANDOM 0x02
198
199static inline bool bdaddr_type_is_valid(__u8 type)
200{
201 switch (type) {
202 case BDADDR_BREDR:
203 case BDADDR_LE_PUBLIC:
204 case BDADDR_LE_RANDOM:
205 return true;
206 }
207
208 return false;
209}
210
211static inline bool bdaddr_type_is_le(__u8 type)
212{
213 switch (type) {
214 case BDADDR_LE_PUBLIC:
215 case BDADDR_LE_RANDOM:
216 return true;
217 }
218
219 return false;
220}
221
222#define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
223#define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}})
224
225/* Copy, swap, convert BD Address */
226static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
227{
228 return memcmp(ba1, ba2, sizeof(bdaddr_t));
229}
230static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
231{
232 memcpy(dst, src, sizeof(bdaddr_t));
233}
234
235void baswap(bdaddr_t *dst, bdaddr_t *src);
236
237/* Common socket structures and functions */
238
239#define bt_sk(__sk) ((struct bt_sock *) __sk)
240
241struct bt_sock {
242 struct sock sk;
243 struct list_head accept_q;
244 struct sock *parent;
245 unsigned long flags;
246 void (*skb_msg_name)(struct sk_buff *, void *, int *);
247};
248
249enum {
250 BT_SK_DEFER_SETUP,
251 BT_SK_SUSPEND,
252};
253
254struct bt_sock_list {
255 struct hlist_head head;
256 rwlock_t lock;
257#ifdef CONFIG_PROC_FS
258 int (* custom_seq_show)(struct seq_file *, void *);
259#endif
260};
261
262int bt_sock_register(int proto, const struct net_proto_family *ops);
263void bt_sock_unregister(int proto);
264void bt_sock_link(struct bt_sock_list *l, struct sock *s);
265void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
266int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
267 int flags);
268int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
269 size_t len, int flags);
270uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
271int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
272int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
273int bt_sock_wait_ready(struct sock *sk, unsigned long flags);
274
275void bt_accept_enqueue(struct sock *parent, struct sock *sk);
276void bt_accept_unlink(struct sock *sk);
277struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
278
279/* Skb helpers */
280struct l2cap_ctrl {
281 __u8 sframe:1,
282 poll:1,
283 final:1,
284 fcs:1,
285 sar:2,
286 super:2;
287 __u16 reqseq;
288 __u16 txseq;
289 __u8 retries;
290 __le16 psm;
291 bdaddr_t bdaddr;
292 struct l2cap_chan *chan;
293};
294
295struct hci_dev;
296
297typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
298typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
299 u16 opcode, struct sk_buff *skb);
300
301#define HCI_REQ_START BIT(0)
302#define HCI_REQ_SKB BIT(1)
303
304struct hci_ctrl {
305 __u16 opcode;
306 u8 req_flags;
307 u8 req_event;
308 union {
309 hci_req_complete_t req_complete;
310 hci_req_complete_skb_t req_complete_skb;
311 };
312};
313
314struct bt_skb_cb {
315 __u8 pkt_type;
316 __u8 force_active;
317 __u16 expect;
318 __u8 incoming:1;
319 union {
320 struct l2cap_ctrl l2cap;
321 struct hci_ctrl hci;
322 };
323};
324#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
325
326#define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type
327#define hci_skb_expect(skb) bt_cb((skb))->expect
328#define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode
329
330static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
331{
332 struct sk_buff *skb;
333
334 skb = alloc_skb(len + BT_SKB_RESERVE, how);
335 if (skb)
336 skb_reserve(skb, BT_SKB_RESERVE);
337 return skb;
338}
339
340static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
341 unsigned long len, int nb, int *err)
342{
343 struct sk_buff *skb;
344
345 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
346 if (skb)
347 skb_reserve(skb, BT_SKB_RESERVE);
348
349 if (!skb && *err)
350 return NULL;
351
352 *err = sock_error(sk);
353 if (*err)
354 goto out;
355
356 if (sk->sk_shutdown) {
357 *err = -ECONNRESET;
358 goto out;
359 }
360
361 return skb;
362
363out:
364 kfree_skb(skb);
365 return NULL;
366}
367
368int bt_to_errno(__u16 code);
369
370void hci_sock_set_flag(struct sock *sk, int nr);
371void hci_sock_clear_flag(struct sock *sk, int nr);
372int hci_sock_test_flag(struct sock *sk, int nr);
373unsigned short hci_sock_get_channel(struct sock *sk);
374
375int hci_sock_init(void);
376void hci_sock_cleanup(void);
377
378int bt_sysfs_init(void);
379void bt_sysfs_cleanup(void);
380
381int bt_procfs_init(struct net *net, const char *name,
382 struct bt_sock_list *sk_list,
383 int (*seq_show)(struct seq_file *, void *));
384void bt_procfs_cleanup(struct net *net, const char *name);
385
386extern struct dentry *bt_debugfs;
387
388int l2cap_init(void);
389void l2cap_exit(void);
390
391#if IS_ENABLED(CONFIG_BT_BREDR)
392int sco_init(void);
393void sco_exit(void);
394#else
395static inline int sco_init(void)
396{
397 return 0;
398}
399
400static inline void sco_exit(void)
401{
402}
403#endif
404
405int mgmt_init(void);
406void mgmt_exit(void);
407
408void bt_sock_reclassify_lock(struct sock *sk, int proto);
409
410#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 <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/* Bluetooth versions */
40#define BLUETOOTH_VER_1_1 1
41#define BLUETOOTH_VER_1_2 2
42#define BLUETOOTH_VER_2_0 3
43
44/* Reserv for core and drivers use */
45#define BT_SKB_RESERVE 8
46
47#define BTPROTO_L2CAP 0
48#define BTPROTO_HCI 1
49#define BTPROTO_SCO 2
50#define BTPROTO_RFCOMM 3
51#define BTPROTO_BNEP 4
52#define BTPROTO_CMTP 5
53#define BTPROTO_HIDP 6
54#define BTPROTO_AVDTP 7
55
56#define SOL_HCI 0
57#define SOL_L2CAP 6
58#define SOL_SCO 17
59#define SOL_RFCOMM 18
60
61#define BT_SECURITY 4
62struct bt_security {
63 __u8 level;
64 __u8 key_size;
65};
66#define BT_SECURITY_SDP 0
67#define BT_SECURITY_LOW 1
68#define BT_SECURITY_MEDIUM 2
69#define BT_SECURITY_HIGH 3
70
71#define BT_DEFER_SETUP 7
72
73#define BT_FLUSHABLE 8
74
75#define BT_FLUSHABLE_OFF 0
76#define BT_FLUSHABLE_ON 1
77
78#define BT_POWER 9
79struct bt_power {
80 __u8 force_active;
81};
82#define BT_POWER_FORCE_ACTIVE_OFF 0
83#define BT_POWER_FORCE_ACTIVE_ON 1
84
85#define BT_CHANNEL_POLICY 10
86
87/* BR/EDR only (default policy)
88 * AMP controllers cannot be used.
89 * Channel move requests from the remote device are denied.
90 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
91 */
92#define BT_CHANNEL_POLICY_BREDR_ONLY 0
93
94/* BR/EDR Preferred
95 * Allow use of AMP controllers.
96 * If the L2CAP channel is currently on AMP, move it to BR/EDR.
97 * Channel move requests from the remote device are allowed.
98 */
99#define BT_CHANNEL_POLICY_BREDR_PREFERRED 1
100
101/* AMP Preferred
102 * Allow use of AMP controllers
103 * If the L2CAP channel is currently on BR/EDR and AMP controller
104 * resources are available, initiate a channel move to AMP.
105 * Channel move requests from the remote device are allowed.
106 * If the L2CAP socket has not been connected yet, try to create
107 * and configure the channel directly on an AMP controller rather
108 * than BR/EDR.
109 */
110#define BT_CHANNEL_POLICY_AMP_PREFERRED 2
111
112__printf(1, 2)
113int bt_info(const char *fmt, ...);
114__printf(1, 2)
115int bt_err(const char *fmt, ...);
116
117#define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
118#define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
119#define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
120
121/* Connection and socket states */
122enum {
123 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
124 BT_OPEN,
125 BT_BOUND,
126 BT_LISTEN,
127 BT_CONNECT,
128 BT_CONNECT2,
129 BT_CONFIG,
130 BT_DISCONN,
131 BT_CLOSED
132};
133
134/* If unused will be removed by compiler */
135static inline const char *state_to_string(int state)
136{
137 switch (state) {
138 case BT_CONNECTED:
139 return "BT_CONNECTED";
140 case BT_OPEN:
141 return "BT_OPEN";
142 case BT_BOUND:
143 return "BT_BOUND";
144 case BT_LISTEN:
145 return "BT_LISTEN";
146 case BT_CONNECT:
147 return "BT_CONNECT";
148 case BT_CONNECT2:
149 return "BT_CONNECT2";
150 case BT_CONFIG:
151 return "BT_CONFIG";
152 case BT_DISCONN:
153 return "BT_DISCONN";
154 case BT_CLOSED:
155 return "BT_CLOSED";
156 }
157
158 return "invalid state";
159}
160
161/* BD Address */
162typedef struct {
163 __u8 b[6];
164} __packed bdaddr_t;
165
166/* BD Address type */
167#define BDADDR_BREDR 0x00
168#define BDADDR_LE_PUBLIC 0x01
169#define BDADDR_LE_RANDOM 0x02
170
171#define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
172#define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff}})
173
174/* Copy, swap, convert BD Address */
175static inline int bacmp(bdaddr_t *ba1, bdaddr_t *ba2)
176{
177 return memcmp(ba1, ba2, sizeof(bdaddr_t));
178}
179static inline void bacpy(bdaddr_t *dst, bdaddr_t *src)
180{
181 memcpy(dst, src, sizeof(bdaddr_t));
182}
183
184void baswap(bdaddr_t *dst, bdaddr_t *src);
185char *batostr(bdaddr_t *ba);
186
187/* Common socket structures and functions */
188
189#define bt_sk(__sk) ((struct bt_sock *) __sk)
190
191struct bt_sock {
192 struct sock sk;
193 bdaddr_t src;
194 bdaddr_t dst;
195 struct list_head accept_q;
196 struct sock *parent;
197 unsigned long flags;
198};
199
200enum {
201 BT_SK_DEFER_SETUP,
202 BT_SK_SUSPEND,
203};
204
205struct bt_sock_list {
206 struct hlist_head head;
207 rwlock_t lock;
208};
209
210int bt_sock_register(int proto, const struct net_proto_family *ops);
211int bt_sock_unregister(int proto);
212void bt_sock_link(struct bt_sock_list *l, struct sock *s);
213void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
214int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
215 struct msghdr *msg, size_t len, int flags);
216int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
217 struct msghdr *msg, size_t len, int flags);
218uint bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait);
219int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
220int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
221
222void bt_accept_enqueue(struct sock *parent, struct sock *sk);
223void bt_accept_unlink(struct sock *sk);
224struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
225
226/* Skb helpers */
227struct l2cap_ctrl {
228 unsigned int sframe : 1,
229 poll : 1,
230 final : 1,
231 fcs : 1,
232 sar : 2,
233 super : 2;
234 __u16 reqseq;
235 __u16 txseq;
236 __u8 retries;
237};
238
239struct bt_skb_cb {
240 __u8 pkt_type;
241 __u8 incoming;
242 __u16 expect;
243 __u8 force_active;
244 struct l2cap_ctrl control;
245};
246#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
247
248static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
249{
250 struct sk_buff *skb;
251
252 if ((skb = alloc_skb(len + BT_SKB_RESERVE, how))) {
253 skb_reserve(skb, BT_SKB_RESERVE);
254 bt_cb(skb)->incoming = 0;
255 }
256 return skb;
257}
258
259static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
260 unsigned long len, int nb, int *err)
261{
262 struct sk_buff *skb;
263
264 if ((skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err))) {
265 skb_reserve(skb, BT_SKB_RESERVE);
266 bt_cb(skb)->incoming = 0;
267 }
268
269 if (!skb && *err)
270 return NULL;
271
272 *err = sock_error(sk);
273 if (*err)
274 goto out;
275
276 if (sk->sk_shutdown) {
277 *err = -ECONNRESET;
278 goto out;
279 }
280
281 return skb;
282
283out:
284 kfree_skb(skb);
285 return NULL;
286}
287
288int bt_to_errno(__u16 code);
289
290extern int hci_sock_init(void);
291extern void hci_sock_cleanup(void);
292
293extern int bt_sysfs_init(void);
294extern void bt_sysfs_cleanup(void);
295
296extern struct dentry *bt_debugfs;
297
298int l2cap_init(void);
299void l2cap_exit(void);
300
301int sco_init(void);
302void sco_exit(void);
303
304void bt_sock_reclassify_lock(struct sock *sk, int proto);
305
306#endif /* __BLUETOOTH_H */