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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 | |
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 */ | |
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 | ||
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 | ||
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 */ | |
227 | static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) | |
228 | { | |
229 | return memcmp(ba1, ba2, sizeof(bdaddr_t)); | |
230 | } | |
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, 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); | |
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 | __u16 reqseq; | |
289 | __u16 txseq; | |
290 | __u8 retries; | |
291 | __le16 psm; | |
292 | bdaddr_t bdaddr; | |
293 | struct l2cap_chan *chan; | |
294 | }; | |
295 | ||
296 | struct hci_dev; | |
297 | ||
298 | typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode); | |
299 | typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status, | |
300 | u16 opcode, struct sk_buff *skb); | |
301 | ||
302 | #define HCI_REQ_START BIT(0) | |
303 | #define HCI_REQ_SKB BIT(1) | |
304 | ||
305 | struct hci_ctrl { | |
306 | __u16 opcode; | |
307 | u8 req_flags; | |
308 | u8 req_event; | |
309 | union { | |
310 | hci_req_complete_t req_complete; | |
311 | hci_req_complete_skb_t req_complete_skb; | |
312 | }; | |
313 | }; | |
314 | ||
315 | struct bt_skb_cb { | |
316 | __u8 pkt_type; | |
317 | __u8 force_active; | |
318 | __u16 expect; | |
319 | __u8 incoming:1; | |
320 | union { | |
321 | struct l2cap_ctrl l2cap; | |
322 | struct hci_ctrl hci; | |
323 | }; | |
324 | }; | |
325 | #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) | |
326 | ||
327 | #define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type | |
328 | #define hci_skb_expect(skb) bt_cb((skb))->expect | |
329 | #define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode | |
330 | ||
331 | static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) | |
332 | { | |
333 | struct sk_buff *skb; | |
334 | ||
335 | skb = alloc_skb(len + BT_SKB_RESERVE, how); | |
336 | if (skb) | |
337 | skb_reserve(skb, BT_SKB_RESERVE); | |
338 | return skb; | |
339 | } | |
340 | ||
341 | static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, | |
342 | unsigned long len, int nb, int *err) | |
343 | { | |
344 | struct sk_buff *skb; | |
345 | ||
346 | skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); | |
347 | if (skb) | |
348 | skb_reserve(skb, BT_SKB_RESERVE); | |
349 | ||
350 | if (!skb && *err) | |
351 | return NULL; | |
352 | ||
353 | *err = sock_error(sk); | |
354 | if (*err) | |
355 | goto out; | |
356 | ||
357 | if (sk->sk_shutdown) { | |
358 | *err = -ECONNRESET; | |
359 | goto out; | |
360 | } | |
361 | ||
362 | return skb; | |
363 | ||
364 | out: | |
365 | kfree_skb(skb); | |
366 | return NULL; | |
367 | } | |
368 | ||
369 | int bt_to_errno(__u16 code); | |
370 | ||
371 | void hci_sock_set_flag(struct sock *sk, int nr); | |
372 | void hci_sock_clear_flag(struct sock *sk, int nr); | |
373 | int hci_sock_test_flag(struct sock *sk, int nr); | |
374 | unsigned short hci_sock_get_channel(struct sock *sk); | |
375 | u32 hci_sock_get_cookie(struct sock *sk); | |
376 | ||
377 | int hci_sock_init(void); | |
378 | void hci_sock_cleanup(void); | |
379 | ||
380 | int bt_sysfs_init(void); | |
381 | void bt_sysfs_cleanup(void); | |
382 | ||
383 | int bt_procfs_init(struct net *net, const char *name, | |
384 | struct bt_sock_list *sk_list, | |
385 | int (*seq_show)(struct seq_file *, void *)); | |
386 | void bt_procfs_cleanup(struct net *net, const char *name); | |
387 | ||
388 | extern struct dentry *bt_debugfs; | |
389 | ||
390 | int l2cap_init(void); | |
391 | void l2cap_exit(void); | |
392 | ||
393 | #if IS_ENABLED(CONFIG_BT_BREDR) | |
394 | int sco_init(void); | |
395 | void sco_exit(void); | |
396 | #else | |
397 | static inline int sco_init(void) | |
398 | { | |
399 | return 0; | |
400 | } | |
401 | ||
402 | static inline void sco_exit(void) | |
403 | { | |
404 | } | |
405 | #endif | |
406 | ||
407 | int mgmt_init(void); | |
408 | void mgmt_exit(void); | |
409 | ||
410 | void bt_sock_reclassify_lock(struct sock *sk, int proto); | |
411 | ||
412 | #endif /* __BLUETOOTH_H */ |