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
45 /* Reserv for core and drivers use */
46 #define BT_SKB_RESERVE 8
47
48 #define BTPROTO_L2CAP 0
49 #define BTPROTO_HCI 1
50 #define BTPROTO_SCO 2
51 #define BTPROTO_RFCOMM 3
52 #define BTPROTO_BNEP 4
53 #define BTPROTO_CMTP 5
54 #define BTPROTO_HIDP 6
55 #define BTPROTO_AVDTP 7
56
57 #define SOL_HCI 0
58 #define SOL_L2CAP 6
59 #define SOL_SCO 17
60 #define SOL_RFCOMM 18
61
62 #define BT_SECURITY 4
63 struct bt_security {
64 __u8 level;
65 __u8 key_size;
66 };
67 #define BT_SECURITY_SDP 0
68 #define BT_SECURITY_LOW 1
69 #define BT_SECURITY_MEDIUM 2
70 #define BT_SECURITY_HIGH 3
71 #define BT_SECURITY_FIPS 4
72
73 #define BT_DEFER_SETUP 7
74
75 #define BT_FLUSHABLE 8
76
77 #define BT_FLUSHABLE_OFF 0
78 #define BT_FLUSHABLE_ON 1
79
80 #define BT_POWER 9
81 struct bt_power {
82 __u8 force_active;
83 };
84 #define BT_POWER_FORCE_ACTIVE_OFF 0
85 #define BT_POWER_FORCE_ACTIVE_ON 1
86
87 #define BT_CHANNEL_POLICY 10
88
89 /* BR/EDR only (default policy)
90 * AMP controllers cannot be used.
91 * Channel move requests from the remote device are denied.
92 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
93 */
94 #define BT_CHANNEL_POLICY_BREDR_ONLY 0
95
96 /* BR/EDR Preferred
97 * Allow use of AMP controllers.
98 * If the L2CAP channel is currently on AMP, move it to BR/EDR.
99 * Channel move requests from the remote device are allowed.
100 */
101 #define BT_CHANNEL_POLICY_BREDR_PREFERRED 1
102
103 /* AMP Preferred
104 * Allow use of AMP controllers
105 * If the L2CAP channel is currently on BR/EDR and AMP controller
106 * resources are available, initiate a channel move to AMP.
107 * Channel move requests from the remote device are allowed.
108 * If the L2CAP socket has not been connected yet, try to create
109 * and configure the channel directly on an AMP controller rather
110 * than BR/EDR.
111 */
112 #define BT_CHANNEL_POLICY_AMP_PREFERRED 2
113
114 #define BT_VOICE 11
115 struct bt_voice {
116 __u16 setting;
117 };
118
119 #define BT_VOICE_TRANSPARENT 0x0003
120 #define BT_VOICE_CVSD_16BIT 0x0060
121
122 #define BT_SNDMTU 12
123 #define BT_RCVMTU 13
124
125 __printf(1, 2)
126 void bt_info(const char *fmt, ...);
127 __printf(1, 2)
128 void bt_warn(const char *fmt, ...);
129 __printf(1, 2)
130 void bt_err(const char *fmt, ...);
131 __printf(1, 2)
132 void bt_err_ratelimited(const char *fmt, ...);
133
134 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
135 #define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__)
136 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
137 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
138
139 #define BT_ERR_RATELIMITED(fmt, ...) bt_err_ratelimited(fmt "\n", ##__VA_ARGS__)
140
141 #define bt_dev_info(hdev, fmt, ...) \
142 BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
143 #define bt_dev_warn(hdev, fmt, ...) \
144 BT_WARN("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
145 #define bt_dev_err(hdev, fmt, ...) \
146 BT_ERR("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
147 #define bt_dev_dbg(hdev, fmt, ...) \
148 BT_DBG("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
149
150 /* Connection and socket states */
151 enum {
152 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
153 BT_OPEN,
154 BT_BOUND,
155 BT_LISTEN,
156 BT_CONNECT,
157 BT_CONNECT2,
158 BT_CONFIG,
159 BT_DISCONN,
160 BT_CLOSED
161 };
162
163 /* If unused will be removed by compiler */
state_to_string(int state)164 static inline const char *state_to_string(int state)
165 {
166 switch (state) {
167 case BT_CONNECTED:
168 return "BT_CONNECTED";
169 case BT_OPEN:
170 return "BT_OPEN";
171 case BT_BOUND:
172 return "BT_BOUND";
173 case BT_LISTEN:
174 return "BT_LISTEN";
175 case BT_CONNECT:
176 return "BT_CONNECT";
177 case BT_CONNECT2:
178 return "BT_CONNECT2";
179 case BT_CONFIG:
180 return "BT_CONFIG";
181 case BT_DISCONN:
182 return "BT_DISCONN";
183 case BT_CLOSED:
184 return "BT_CLOSED";
185 }
186
187 return "invalid state";
188 }
189
190 /* BD Address */
191 typedef struct {
192 __u8 b[6];
193 } __packed bdaddr_t;
194
195 /* BD Address type */
196 #define BDADDR_BREDR 0x00
197 #define BDADDR_LE_PUBLIC 0x01
198 #define BDADDR_LE_RANDOM 0x02
199
bdaddr_type_is_valid(u8 type)200 static inline bool bdaddr_type_is_valid(u8 type)
201 {
202 switch (type) {
203 case BDADDR_BREDR:
204 case BDADDR_LE_PUBLIC:
205 case BDADDR_LE_RANDOM:
206 return true;
207 }
208
209 return false;
210 }
211
bdaddr_type_is_le(u8 type)212 static inline bool bdaddr_type_is_le(u8 type)
213 {
214 switch (type) {
215 case BDADDR_LE_PUBLIC:
216 case BDADDR_LE_RANDOM:
217 return true;
218 }
219
220 return false;
221 }
222
223 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
224 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}})
225
226 /* Copy, swap, convert BD Address */
bacmp(const bdaddr_t * ba1,const bdaddr_t * ba2)227 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
228 {
229 return memcmp(ba1, ba2, sizeof(bdaddr_t));
230 }
bacpy(bdaddr_t * dst,const bdaddr_t * src)231 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
232 {
233 memcpy(dst, src, sizeof(bdaddr_t));
234 }
235
236 void baswap(bdaddr_t *dst, const bdaddr_t *src);
237
238 /* Common socket structures and functions */
239
240 #define bt_sk(__sk) ((struct bt_sock *) __sk)
241
242 struct bt_sock {
243 struct sock sk;
244 struct list_head accept_q;
245 struct sock *parent;
246 unsigned long flags;
247 void (*skb_msg_name)(struct sk_buff *, void *, int *);
248 };
249
250 enum {
251 BT_SK_DEFER_SETUP,
252 BT_SK_SUSPEND,
253 };
254
255 struct bt_sock_list {
256 struct hlist_head head;
257 rwlock_t lock;
258 #ifdef CONFIG_PROC_FS
259 int (* custom_seq_show)(struct seq_file *, void *);
260 #endif
261 };
262
263 int bt_sock_register(int proto, const struct net_proto_family *ops);
264 void bt_sock_unregister(int proto);
265 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
266 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
267 int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
268 int flags);
269 int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
270 size_t len, int flags);
271 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
272 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
273 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
274 int bt_sock_wait_ready(struct sock *sk, unsigned long flags);
275
276 void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh);
277 void bt_accept_unlink(struct sock *sk);
278 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
279
280 /* Skb helpers */
281 struct l2cap_ctrl {
282 u8 sframe:1,
283 poll:1,
284 final:1,
285 fcs:1,
286 sar:2,
287 super:2;
288
289 u16 reqseq;
290 u16 txseq;
291 u8 retries;
292 __le16 psm;
293 bdaddr_t bdaddr;
294 struct l2cap_chan *chan;
295 };
296
297 struct hci_dev;
298
299 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
300 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
301 u16 opcode, struct sk_buff *skb);
302
303 #define HCI_REQ_START BIT(0)
304 #define HCI_REQ_SKB BIT(1)
305
306 struct hci_ctrl {
307 u16 opcode;
308 u8 req_flags;
309 u8 req_event;
310 union {
311 hci_req_complete_t req_complete;
312 hci_req_complete_skb_t req_complete_skb;
313 };
314 };
315
316 struct bt_skb_cb {
317 u8 pkt_type;
318 u8 force_active;
319 u16 expect;
320 u8 incoming:1;
321 union {
322 struct l2cap_ctrl l2cap;
323 struct hci_ctrl hci;
324 };
325 };
326 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
327
328 #define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type
329 #define hci_skb_expect(skb) bt_cb((skb))->expect
330 #define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode
331
bt_skb_alloc(unsigned int len,gfp_t how)332 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
333 {
334 struct sk_buff *skb;
335
336 skb = alloc_skb(len + BT_SKB_RESERVE, how);
337 if (skb)
338 skb_reserve(skb, BT_SKB_RESERVE);
339 return skb;
340 }
341
bt_skb_send_alloc(struct sock * sk,unsigned long len,int nb,int * err)342 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
343 unsigned long len, int nb, int *err)
344 {
345 struct sk_buff *skb;
346
347 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
348 if (skb)
349 skb_reserve(skb, BT_SKB_RESERVE);
350
351 if (!skb && *err)
352 return NULL;
353
354 *err = sock_error(sk);
355 if (*err)
356 goto out;
357
358 if (sk->sk_shutdown) {
359 *err = -ECONNRESET;
360 goto out;
361 }
362
363 return skb;
364
365 out:
366 kfree_skb(skb);
367 return NULL;
368 }
369
370 int bt_to_errno(u16 code);
371
372 void hci_sock_set_flag(struct sock *sk, int nr);
373 void hci_sock_clear_flag(struct sock *sk, int nr);
374 int hci_sock_test_flag(struct sock *sk, int nr);
375 unsigned short hci_sock_get_channel(struct sock *sk);
376 u32 hci_sock_get_cookie(struct sock *sk);
377
378 int hci_sock_init(void);
379 void hci_sock_cleanup(void);
380
381 int bt_sysfs_init(void);
382 void bt_sysfs_cleanup(void);
383
384 int bt_procfs_init(struct net *net, const char *name,
385 struct bt_sock_list *sk_list,
386 int (*seq_show)(struct seq_file *, void *));
387 void bt_procfs_cleanup(struct net *net, const char *name);
388
389 extern struct dentry *bt_debugfs;
390
391 int l2cap_init(void);
392 void l2cap_exit(void);
393
394 #if IS_ENABLED(CONFIG_BT_BREDR)
395 int sco_init(void);
396 void sco_exit(void);
397 #else
sco_init(void)398 static inline int sco_init(void)
399 {
400 return 0;
401 }
402
sco_exit(void)403 static inline void sco_exit(void)
404 {
405 }
406 #endif
407
408 int mgmt_init(void);
409 void mgmt_exit(void);
410
411 void bt_sock_reclassify_lock(struct sock *sk, int proto);
412
413 #endif /* __BLUETOOTH_H */
414