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

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