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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 
 69 #define BT_DEFER_SETUP  7
 70 
 71 #define BT_FLUSHABLE    8
 72 
 73 #define BT_FLUSHABLE_OFF        0
 74 #define BT_FLUSHABLE_ON         1
 75 
 76 #define BT_POWER        9
 77 struct bt_power {
 78         __u8 force_active;
 79 };
 80 #define BT_POWER_FORCE_ACTIVE_OFF 0
 81 #define BT_POWER_FORCE_ACTIVE_ON  1
 82 
 83 #define BT_CHANNEL_POLICY       10
 84 
 85 /* BR/EDR only (default policy)
 86  *   AMP controllers cannot be used.
 87  *   Channel move requests from the remote device are denied.
 88  *   If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
 89  */
 90 #define BT_CHANNEL_POLICY_BREDR_ONLY            0
 91 
 92 /* BR/EDR Preferred
 93  *   Allow use of AMP controllers.
 94  *   If the L2CAP channel is currently on AMP, move it to BR/EDR.
 95  *   Channel move requests from the remote device are allowed.
 96  */
 97 #define BT_CHANNEL_POLICY_BREDR_PREFERRED       1
 98 
 99 /* AMP Preferred
100  *   Allow use of AMP controllers
101  *   If the L2CAP channel is currently on BR/EDR and AMP controller
102  *     resources are available, initiate a channel move to AMP.
103  *   Channel move requests from the remote device are allowed.
104  *   If the L2CAP socket has not been connected yet, try to create
105  *     and configure the channel directly on an AMP controller rather
106  *     than BR/EDR.
107  */
108 #define BT_CHANNEL_POLICY_AMP_PREFERRED         2
109 
110 #define BT_VOICE                11
111 struct bt_voice {
112         __u16 setting;
113 };
114 
115 #define BT_VOICE_TRANSPARENT                    0x0003
116 #define BT_VOICE_CVSD_16BIT                     0x0060
117 
118 #define BT_SNDMTU               12
119 #define BT_RCVMTU               13
120 
121 __printf(1, 2)
122 int bt_info(const char *fmt, ...);
123 __printf(1, 2)
124 int bt_err(const char *fmt, ...);
125 
126 #define BT_INFO(fmt, ...)       bt_info(fmt "\n", ##__VA_ARGS__)
127 #define BT_ERR(fmt, ...)        bt_err(fmt "\n", ##__VA_ARGS__)
128 #define BT_DBG(fmt, ...)        pr_debug(fmt "\n", ##__VA_ARGS__)
129 
130 /* Connection and socket states */
131 enum {
132         BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
133         BT_OPEN,
134         BT_BOUND,
135         BT_LISTEN,
136         BT_CONNECT,
137         BT_CONNECT2,
138         BT_CONFIG,
139         BT_DISCONN,
140         BT_CLOSED
141 };
142 
143 /* If unused will be removed by compiler */
144 static inline const char *state_to_string(int state)
145 {
146         switch (state) {
147         case BT_CONNECTED:
148                 return "BT_CONNECTED";
149         case BT_OPEN:
150                 return "BT_OPEN";
151         case BT_BOUND:
152                 return "BT_BOUND";
153         case BT_LISTEN:
154                 return "BT_LISTEN";
155         case BT_CONNECT:
156                 return "BT_CONNECT";
157         case BT_CONNECT2:
158                 return "BT_CONNECT2";
159         case BT_CONFIG:
160                 return "BT_CONFIG";
161         case BT_DISCONN:
162                 return "BT_DISCONN";
163         case BT_CLOSED:
164                 return "BT_CLOSED";
165         }
166 
167         return "invalid state";
168 }
169 
170 /* BD Address */
171 typedef struct {
172         __u8 b[6];
173 } __packed bdaddr_t;
174 
175 /* BD Address type */
176 #define BDADDR_BREDR            0x00
177 #define BDADDR_LE_PUBLIC        0x01
178 #define BDADDR_LE_RANDOM        0x02
179 
180 static inline bool bdaddr_type_is_valid(__u8 type)
181 {
182         switch (type) {
183         case BDADDR_BREDR:
184         case BDADDR_LE_PUBLIC:
185         case BDADDR_LE_RANDOM:
186                 return true;
187         }
188 
189         return false;
190 }
191 
192 static inline bool bdaddr_type_is_le(__u8 type)
193 {
194         switch (type) {
195         case BDADDR_LE_PUBLIC:
196         case BDADDR_LE_RANDOM:
197                 return true;
198         }
199 
200         return false;
201 }
202 
203 #define BDADDR_ANY  (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
204 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}})
205 
206 /* Copy, swap, convert BD Address */
207 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
208 {
209         return memcmp(ba1, ba2, sizeof(bdaddr_t));
210 }
211 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
212 {
213         memcpy(dst, src, sizeof(bdaddr_t));
214 }
215 
216 void baswap(bdaddr_t *dst, bdaddr_t *src);
217 
218 /* Common socket structures and functions */
219 
220 #define bt_sk(__sk) ((struct bt_sock *) __sk)
221 
222 struct bt_sock {
223         struct sock sk;
224         struct list_head accept_q;
225         struct sock *parent;
226         unsigned long flags;
227         void (*skb_msg_name)(struct sk_buff *, void *, int *);
228 };
229 
230 enum {
231         BT_SK_DEFER_SETUP,
232         BT_SK_SUSPEND,
233 };
234 
235 struct bt_sock_list {
236         struct hlist_head head;
237         rwlock_t          lock;
238 #ifdef CONFIG_PROC_FS
239         int (* custom_seq_show)(struct seq_file *, void *);
240 #endif
241 };
242 
243 int  bt_sock_register(int proto, const struct net_proto_family *ops);
244 void bt_sock_unregister(int proto);
245 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
246 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
247 int  bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
248                                 struct msghdr *msg, size_t len, int flags);
249 int  bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
250                         struct msghdr *msg, size_t len, int flags);
251 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
252 int  bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
253 int  bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
254 int  bt_sock_wait_ready(struct sock *sk, unsigned long flags);
255 
256 void bt_accept_enqueue(struct sock *parent, struct sock *sk);
257 void bt_accept_unlink(struct sock *sk);
258 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
259 
260 /* Skb helpers */
261 struct l2cap_ctrl {
262         unsigned int    sframe:1,
263                         poll:1,
264                         final:1,
265                         fcs:1,
266                         sar:2,
267                         super:2;
268         __u16           reqseq;
269         __u16           txseq;
270         __u8            retries;
271 };
272 
273 struct hci_dev;
274 
275 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status);
276 
277 struct hci_req_ctrl {
278         bool                    start;
279         u8                      event;
280         hci_req_complete_t      complete;
281 };
282 
283 struct bt_skb_cb {
284         __u8 pkt_type;
285         __u8 incoming;
286         __u16 expect;
287         __u8 force_active;
288         struct l2cap_chan *chan;
289         struct l2cap_ctrl control;
290         struct hci_req_ctrl req;
291         bdaddr_t bdaddr;
292         __le16 psm;
293 };
294 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
295 
296 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
297 {
298         struct sk_buff *skb;
299 
300         skb = alloc_skb(len + BT_SKB_RESERVE, how);
301         if (skb) {
302                 skb_reserve(skb, BT_SKB_RESERVE);
303                 bt_cb(skb)->incoming  = 0;
304         }
305         return skb;
306 }
307 
308 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
309                                         unsigned long len, int nb, int *err)
310 {
311         struct sk_buff *skb;
312 
313         skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
314         if (skb) {
315                 skb_reserve(skb, BT_SKB_RESERVE);
316                 bt_cb(skb)->incoming  = 0;
317         }
318 
319         if (!skb && *err)
320                 return NULL;
321 
322         *err = sock_error(sk);
323         if (*err)
324                 goto out;
325 
326         if (sk->sk_shutdown) {
327                 *err = -ECONNRESET;
328                 goto out;
329         }
330 
331         return skb;
332 
333 out:
334         kfree_skb(skb);
335         return NULL;
336 }
337 
338 int bt_to_errno(__u16 code);
339 
340 int hci_sock_init(void);
341 void hci_sock_cleanup(void);
342 
343 int bt_sysfs_init(void);
344 void bt_sysfs_cleanup(void);
345 
346 int bt_procfs_init(struct net *net, const char *name,
347                    struct bt_sock_list *sk_list,
348                    int (*seq_show)(struct seq_file *, void *));
349 void bt_procfs_cleanup(struct net *net, const char *name);
350 
351 extern struct dentry *bt_debugfs;
352 
353 int l2cap_init(void);
354 void l2cap_exit(void);
355 
356 int sco_init(void);
357 void sco_exit(void);
358 
359 void bt_sock_reclassify_lock(struct sock *sk, int proto);
360 
361 #endif /* __BLUETOOTH_H */
362 

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