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 __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 */
122 BT_OPEN,
123 BT_BOUND,
124 BT_LISTEN,
125 BT_CONNECT,
126 BT_CONNECT2,
127 BT_CONFIG,
128 BT_DISCONN,
129 BT_CLOSED
130 };
131
132 /* If unused will be removed by compiler */
state_to_string(int state)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
bdaddr_type_is_valid(__u8 type)169 static inline bool bdaddr_type_is_valid(__u8 type)
170 {
171 switch (type) {
172 case BDADDR_BREDR:
173 case BDADDR_LE_PUBLIC:
174 case BDADDR_LE_RANDOM:
175 return true;
176 }
177
178 return false;
179 }
180
bdaddr_type_is_le(__u8 type)181 static inline bool bdaddr_type_is_le(__u8 type)
182 {
183 switch (type) {
184 case BDADDR_LE_PUBLIC:
185 case BDADDR_LE_RANDOM:
186 return true;
187 }
188
189 return false;
190 }
191
192 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0} })
193 #define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff} })
194
195 /* Copy, swap, convert BD Address */
bacmp(const bdaddr_t * ba1,const bdaddr_t * ba2)196 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
197 {
198 return memcmp(ba1, ba2, sizeof(bdaddr_t));
199 }
bacpy(bdaddr_t * dst,const bdaddr_t * src)200 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
201 {
202 memcpy(dst, src, sizeof(bdaddr_t));
203 }
204
205 void baswap(bdaddr_t *dst, bdaddr_t *src);
206
207 /* Common socket structures and functions */
208
209 #define bt_sk(__sk) ((struct bt_sock *) __sk)
210
211 struct bt_sock {
212 struct sock sk;
213 bdaddr_t src;
214 bdaddr_t dst;
215 struct list_head accept_q;
216 struct sock *parent;
217 unsigned long flags;
218 };
219
220 enum {
221 BT_SK_DEFER_SETUP,
222 BT_SK_SUSPEND,
223 };
224
225 struct bt_sock_list {
226 struct hlist_head head;
227 rwlock_t lock;
228 #ifdef CONFIG_PROC_FS
229 int (* custom_seq_show)(struct seq_file *, void *);
230 #endif
231 };
232
233 int bt_sock_register(int proto, const struct net_proto_family *ops);
234 void bt_sock_unregister(int proto);
235 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
236 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
237 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
238 struct msghdr *msg, size_t len, int flags);
239 int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
240 struct msghdr *msg, size_t len, int flags);
241 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
242 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
243 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
244
245 void bt_accept_enqueue(struct sock *parent, struct sock *sk);
246 void bt_accept_unlink(struct sock *sk);
247 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
248
249 /* Skb helpers */
250 struct l2cap_ctrl {
251 unsigned int sframe:1,
252 poll:1,
253 final:1,
254 fcs:1,
255 sar:2,
256 super:2;
257 __u16 reqseq;
258 __u16 txseq;
259 __u8 retries;
260 };
261
262 struct hci_dev;
263
264 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status);
265
266 struct hci_req_ctrl {
267 bool start;
268 u8 event;
269 hci_req_complete_t complete;
270 };
271
272 struct bt_skb_cb {
273 __u8 pkt_type;
274 __u8 incoming;
275 __u16 expect;
276 __u8 force_active;
277 struct l2cap_ctrl control;
278 struct hci_req_ctrl req;
279 };
280 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
281
bt_skb_alloc(unsigned int len,gfp_t how)282 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
283 {
284 struct sk_buff *skb;
285
286 skb = alloc_skb(len + BT_SKB_RESERVE, how);
287 if (skb) {
288 skb_reserve(skb, BT_SKB_RESERVE);
289 bt_cb(skb)->incoming = 0;
290 }
291 return skb;
292 }
293
bt_skb_send_alloc(struct sock * sk,unsigned long len,int nb,int * err)294 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
295 unsigned long len, int nb, int *err)
296 {
297 struct sk_buff *skb;
298
299 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
300 if (skb) {
301 skb_reserve(skb, BT_SKB_RESERVE);
302 bt_cb(skb)->incoming = 0;
303 }
304
305 if (!skb && *err)
306 return NULL;
307
308 *err = sock_error(sk);
309 if (*err)
310 goto out;
311
312 if (sk->sk_shutdown) {
313 *err = -ECONNRESET;
314 goto out;
315 }
316
317 return skb;
318
319 out:
320 kfree_skb(skb);
321 return NULL;
322 }
323
324 int bt_to_errno(__u16 code);
325
326 extern int hci_sock_init(void);
327 extern void hci_sock_cleanup(void);
328
329 extern int bt_sysfs_init(void);
330 extern void bt_sysfs_cleanup(void);
331
332 extern int bt_procfs_init(struct net *net, const char *name,
333 struct bt_sock_list* sk_list,
334 int (* seq_show)(struct seq_file *, void *));
335 extern void bt_procfs_cleanup(struct net *net, const char *name);
336
337 extern struct dentry *bt_debugfs;
338
339 int l2cap_init(void);
340 void l2cap_exit(void);
341
342 int sco_init(void);
343 void sco_exit(void);
344
345 void bt_sock_reclassify_lock(struct sock *sk, int proto);
346
347 #endif /* __BLUETOOTH_H */
348