Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
bluetooth.h
Go to the documentation of this file.
1 /*
2  BlueZ - Bluetooth protocol stack for Linux
3  Copyright (C) 2000-2001 Qualcomm Incorporated
4 
5  Written 2000,2001 by Maxim Krasnyansky <[email protected]>
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 {
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 {
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 __printf(1, 2)
111 int bt_info(const char *fmt, ...);
112 __printf(1, 2)
113 int bt_err(const char *fmt, ...);
114 
115 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
116 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
117 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
118 
119 /* Connection and socket states */
120 enum {
121  BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
130 };
131 
132 /* If unused will be removed by compiler */
133 static inline const char *state_to_string(int state)
134 {
135  switch (state) {
136  case BT_CONNECTED:
137  return "BT_CONNECTED";
138  case BT_OPEN:
139  return "BT_OPEN";
140  case BT_BOUND:
141  return "BT_BOUND";
142  case BT_LISTEN:
143  return "BT_LISTEN";
144  case BT_CONNECT:
145  return "BT_CONNECT";
146  case BT_CONNECT2:
147  return "BT_CONNECT2";
148  case BT_CONFIG:
149  return "BT_CONFIG";
150  case BT_DISCONN:
151  return "BT_DISCONN";
152  case BT_CLOSED:
153  return "BT_CLOSED";
154  }
155 
156  return "invalid state";
157 }
158 
159 /* BD Address */
160 typedef struct {
161  __u8 b[6];
162 } __packed bdaddr_t;
163 
164 /* BD Address type */
165 #define BDADDR_BREDR 0x00
166 #define BDADDR_LE_PUBLIC 0x01
167 #define BDADDR_LE_RANDOM 0x02
168 
169 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0} })
170 #define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff} })
171 
172 /* Copy, swap, convert BD Address */
173 static inline int bacmp(bdaddr_t *ba1, bdaddr_t *ba2)
174 {
175  return memcmp(ba1, ba2, sizeof(bdaddr_t));
176 }
177 static inline void bacpy(bdaddr_t *dst, bdaddr_t *src)
178 {
179  memcpy(dst, src, sizeof(bdaddr_t));
180 }
181 
182 void baswap(bdaddr_t *dst, bdaddr_t *src);
183 char *batostr(bdaddr_t *ba);
184 
185 /* Common socket structures and functions */
186 
187 #define bt_sk(__sk) ((struct bt_sock *) __sk)
188 
189 struct bt_sock {
190  struct sock sk;
191  bdaddr_t src;
192  bdaddr_t dst;
194  struct sock *parent;
195  unsigned long flags;
196 };
197 
198 enum {
201 };
202 
203 struct bt_sock_list {
204  struct hlist_head head;
206 #ifdef CONFIG_PROC_FS
207  struct file_operations fops;
208  int (* custom_seq_show)(struct seq_file *, void *);
209 #endif
210 };
211 
212 int bt_sock_register(int proto, const struct net_proto_family *ops);
213 int bt_sock_unregister(int proto);
214 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
215 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
216 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
217  struct msghdr *msg, size_t len, int flags);
218 int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
219  struct msghdr *msg, size_t len, int flags);
220 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
221 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
222 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
223 
224 void bt_accept_enqueue(struct sock *parent, struct sock *sk);
225 void bt_accept_unlink(struct sock *sk);
226 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
227 
228 /* Skb helpers */
229 struct l2cap_ctrl {
230  unsigned int sframe:1,
231  poll:1,
232  final:1,
233  fcs:1,
234  sar:2,
235  super:2;
239 };
240 
241 struct bt_skb_cb {
247 };
248 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
249 
250 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
251 {
252  struct sk_buff *skb;
253 
254  skb = alloc_skb(len + BT_SKB_RESERVE, how);
255  if (skb) {
256  skb_reserve(skb, BT_SKB_RESERVE);
257  bt_cb(skb)->incoming = 0;
258  }
259  return skb;
260 }
261 
262 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
263  unsigned long len, int nb, int *err)
264 {
265  struct sk_buff *skb;
266 
267  skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
268  if (skb) {
269  skb_reserve(skb, BT_SKB_RESERVE);
270  bt_cb(skb)->incoming = 0;
271  }
272 
273  if (!skb && *err)
274  return NULL;
275 
276  *err = sock_error(sk);
277  if (*err)
278  goto out;
279 
280  if (sk->sk_shutdown) {
281  *err = -ECONNRESET;
282  goto out;
283  }
284 
285  return skb;
286 
287 out:
288  kfree_skb(skb);
289  return NULL;
290 }
291 
292 int bt_to_errno(__u16 code);
293 
294 extern int hci_sock_init(void);
295 extern void hci_sock_cleanup(void);
296 
297 extern int bt_sysfs_init(void);
298 extern void bt_sysfs_cleanup(void);
299 
300 extern int bt_procfs_init(struct module* module, struct net *net, const char *name,
301  struct bt_sock_list* sk_list,
302  int (* seq_show)(struct seq_file *, void *));
303 extern void bt_procfs_cleanup(struct net *net, const char *name);
304 
305 extern struct dentry *bt_debugfs;
306 
307 int l2cap_init(void);
308 void l2cap_exit(void);
309 
310 int sco_init(void);
311 void sco_exit(void);
312 
313 void bt_sock_reclassify_lock(struct sock *sk, int proto);
314 
315 #endif /* __BLUETOOTH_H */