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 | #define bt_dev_err_ratelimited(hdev, fmt, ...) \ |
151 | BT_ERR_RATELIMITED("%s: " fmt, (hdev)->name, ##__VA_ARGS__) |
152 | |
153 | /* Connection and socket states */ |
154 | enum { |
155 | BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ |
156 | BT_OPEN, |
157 | BT_BOUND, |
158 | BT_LISTEN, |
159 | BT_CONNECT, |
160 | BT_CONNECT2, |
161 | BT_CONFIG, |
162 | BT_DISCONN, |
163 | BT_CLOSED |
164 | }; |
165 | |
166 | /* If unused will be removed by compiler */ |
167 | static inline const char *state_to_string(int state) |
168 | { |
169 | switch (state) { |
170 | case BT_CONNECTED: |
171 | return "BT_CONNECTED" ; |
172 | case BT_OPEN: |
173 | return "BT_OPEN" ; |
174 | case BT_BOUND: |
175 | return "BT_BOUND" ; |
176 | case BT_LISTEN: |
177 | return "BT_LISTEN" ; |
178 | case BT_CONNECT: |
179 | return "BT_CONNECT" ; |
180 | case BT_CONNECT2: |
181 | return "BT_CONNECT2" ; |
182 | case BT_CONFIG: |
183 | return "BT_CONFIG" ; |
184 | case BT_DISCONN: |
185 | return "BT_DISCONN" ; |
186 | case BT_CLOSED: |
187 | return "BT_CLOSED" ; |
188 | } |
189 | |
190 | return "invalid state" ; |
191 | } |
192 | |
193 | /* BD Address */ |
194 | typedef struct { |
195 | __u8 b[6]; |
196 | } __packed bdaddr_t; |
197 | |
198 | /* BD Address type */ |
199 | #define BDADDR_BREDR 0x00 |
200 | #define BDADDR_LE_PUBLIC 0x01 |
201 | #define BDADDR_LE_RANDOM 0x02 |
202 | |
203 | static inline bool bdaddr_type_is_valid(u8 type) |
204 | { |
205 | switch (type) { |
206 | case BDADDR_BREDR: |
207 | case BDADDR_LE_PUBLIC: |
208 | case BDADDR_LE_RANDOM: |
209 | return true; |
210 | } |
211 | |
212 | return false; |
213 | } |
214 | |
215 | static inline bool bdaddr_type_is_le(u8 type) |
216 | { |
217 | switch (type) { |
218 | case BDADDR_LE_PUBLIC: |
219 | case BDADDR_LE_RANDOM: |
220 | return true; |
221 | } |
222 | |
223 | return false; |
224 | } |
225 | |
226 | #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}}) |
227 | #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}) |
228 | |
229 | /* Copy, swap, convert BD Address */ |
230 | static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) |
231 | { |
232 | return memcmp(ba1, ba2, sizeof(bdaddr_t)); |
233 | } |
234 | static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src) |
235 | { |
236 | memcpy(dst, src, sizeof(bdaddr_t)); |
237 | } |
238 | |
239 | void baswap(bdaddr_t *dst, const bdaddr_t *src); |
240 | |
241 | /* Common socket structures and functions */ |
242 | |
243 | #define bt_sk(__sk) ((struct bt_sock *) __sk) |
244 | |
245 | struct bt_sock { |
246 | struct sock sk; |
247 | struct list_head accept_q; |
248 | struct sock *parent; |
249 | unsigned long flags; |
250 | void (*skb_msg_name)(struct sk_buff *, void *, int *); |
251 | }; |
252 | |
253 | enum { |
254 | BT_SK_DEFER_SETUP, |
255 | BT_SK_SUSPEND, |
256 | }; |
257 | |
258 | struct bt_sock_list { |
259 | struct hlist_head head; |
260 | rwlock_t lock; |
261 | #ifdef CONFIG_PROC_FS |
262 | int (* custom_seq_show)(struct seq_file *, void *); |
263 | #endif |
264 | }; |
265 | |
266 | int bt_sock_register(int proto, const struct net_proto_family *ops); |
267 | void bt_sock_unregister(int proto); |
268 | void bt_sock_link(struct bt_sock_list *l, struct sock *s); |
269 | void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); |
270 | int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, |
271 | int flags); |
272 | int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, |
273 | size_t len, int flags); |
274 | __poll_t bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); |
275 | int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); |
276 | int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); |
277 | int bt_sock_wait_ready(struct sock *sk, unsigned long flags); |
278 | |
279 | void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh); |
280 | void bt_accept_unlink(struct sock *sk); |
281 | struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); |
282 | |
283 | /* Skb helpers */ |
284 | struct l2cap_ctrl { |
285 | u8 sframe:1, |
286 | poll:1, |
287 | final:1, |
288 | fcs:1, |
289 | sar:2, |
290 | super:2; |
291 | |
292 | u16 reqseq; |
293 | u16 txseq; |
294 | u8 retries; |
295 | __le16 psm; |
296 | bdaddr_t bdaddr; |
297 | struct l2cap_chan *chan; |
298 | }; |
299 | |
300 | struct hci_dev; |
301 | |
302 | typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode); |
303 | typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status, |
304 | u16 opcode, struct sk_buff *skb); |
305 | |
306 | #define HCI_REQ_START BIT(0) |
307 | #define HCI_REQ_SKB BIT(1) |
308 | |
309 | struct hci_ctrl { |
310 | u16 opcode; |
311 | u8 req_flags; |
312 | u8 req_event; |
313 | union { |
314 | hci_req_complete_t req_complete; |
315 | hci_req_complete_skb_t req_complete_skb; |
316 | }; |
317 | }; |
318 | |
319 | struct bt_skb_cb { |
320 | u8 pkt_type; |
321 | u8 force_active; |
322 | u16 expect; |
323 | u8 incoming:1; |
324 | union { |
325 | struct l2cap_ctrl l2cap; |
326 | struct hci_ctrl hci; |
327 | }; |
328 | }; |
329 | #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) |
330 | |
331 | #define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type |
332 | #define hci_skb_expect(skb) bt_cb((skb))->expect |
333 | #define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode |
334 | |
335 | static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) |
336 | { |
337 | struct sk_buff *skb; |
338 | |
339 | skb = alloc_skb(len + BT_SKB_RESERVE, how); |
340 | if (skb) |
341 | skb_reserve(skb, BT_SKB_RESERVE); |
342 | return skb; |
343 | } |
344 | |
345 | static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, |
346 | unsigned long len, int nb, int *err) |
347 | { |
348 | struct sk_buff *skb; |
349 | |
350 | skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); |
351 | if (skb) |
352 | skb_reserve(skb, BT_SKB_RESERVE); |
353 | |
354 | if (!skb && *err) |
355 | return NULL; |
356 | |
357 | *err = sock_error(sk); |
358 | if (*err) |
359 | goto out; |
360 | |
361 | if (sk->sk_shutdown) { |
362 | *err = -ECONNRESET; |
363 | goto out; |
364 | } |
365 | |
366 | return skb; |
367 | |
368 | out: |
369 | kfree_skb(skb); |
370 | return NULL; |
371 | } |
372 | |
373 | int bt_to_errno(u16 code); |
374 | |
375 | void hci_sock_set_flag(struct sock *sk, int nr); |
376 | void hci_sock_clear_flag(struct sock *sk, int nr); |
377 | int hci_sock_test_flag(struct sock *sk, int nr); |
378 | unsigned short hci_sock_get_channel(struct sock *sk); |
379 | u32 hci_sock_get_cookie(struct sock *sk); |
380 | |
381 | int hci_sock_init(void); |
382 | void hci_sock_cleanup(void); |
383 | |
384 | int bt_sysfs_init(void); |
385 | void bt_sysfs_cleanup(void); |
386 | |
387 | int bt_procfs_init(struct net *net, const char *name, |
388 | struct bt_sock_list *sk_list, |
389 | int (*seq_show)(struct seq_file *, void *)); |
390 | void bt_procfs_cleanup(struct net *net, const char *name); |
391 | |
392 | extern struct dentry *bt_debugfs; |
393 | |
394 | int l2cap_init(void); |
395 | void l2cap_exit(void); |
396 | |
397 | #if IS_ENABLED(CONFIG_BT_BREDR) |
398 | int sco_init(void); |
399 | void sco_exit(void); |
400 | #else |
401 | static inline int sco_init(void) |
402 | { |
403 | return 0; |
404 | } |
405 | |
406 | static inline void sco_exit(void) |
407 | { |
408 | } |
409 | #endif |
410 | |
411 | int mgmt_init(void); |
412 | void mgmt_exit(void); |
413 | |
414 | void bt_sock_reclassify_lock(struct sock *sk, int proto); |
415 | |
416 | #endif /* __BLUETOOTH_H */ |
417 | |