Linux kernel mirror (for testing)
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linux
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
60struct 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
77struct 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)
111int bt_info(const char *fmt, ...);
112__printf(1, 2)
113int 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 */
120enum {
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 */
133static 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 */
160typedef 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 */
173static inline int bacmp(bdaddr_t *ba1, bdaddr_t *ba2)
174{
175 return memcmp(ba1, ba2, sizeof(bdaddr_t));
176}
177static inline void bacpy(bdaddr_t *dst, bdaddr_t *src)
178{
179 memcpy(dst, src, sizeof(bdaddr_t));
180}
181
182void baswap(bdaddr_t *dst, bdaddr_t *src);
183char *batostr(bdaddr_t *ba);
184
185/* Common socket structures and functions */
186
187#define bt_sk(__sk) ((struct bt_sock *) __sk)
188
189struct bt_sock {
190 struct sock sk;
191 bdaddr_t src;
192 bdaddr_t dst;
193 struct list_head accept_q;
194 struct sock *parent;
195 unsigned long flags;
196};
197
198enum {
199 BT_SK_DEFER_SETUP,
200 BT_SK_SUSPEND,
201};
202
203struct bt_sock_list {
204 struct hlist_head head;
205 rwlock_t lock;
206#ifdef CONFIG_PROC_FS
207 struct file_operations fops;
208 int (* custom_seq_show)(struct seq_file *, void *);
209#endif
210};
211
212int bt_sock_register(int proto, const struct net_proto_family *ops);
213int bt_sock_unregister(int proto);
214void bt_sock_link(struct bt_sock_list *l, struct sock *s);
215void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
216int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
217 struct msghdr *msg, size_t len, int flags);
218int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
219 struct msghdr *msg, size_t len, int flags);
220uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
221int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
222int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
223
224void bt_accept_enqueue(struct sock *parent, struct sock *sk);
225void bt_accept_unlink(struct sock *sk);
226struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
227
228/* Skb helpers */
229struct l2cap_ctrl {
230 unsigned int sframe:1,
231 poll:1,
232 final:1,
233 fcs:1,
234 sar:2,
235 super:2;
236 __u16 reqseq;
237 __u16 txseq;
238 __u8 retries;
239};
240
241struct bt_skb_cb {
242 __u8 pkt_type;
243 __u8 incoming;
244 __u16 expect;
245 __u8 force_active;
246 struct l2cap_ctrl control;
247};
248#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
249
250static 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
262static 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
287out:
288 kfree_skb(skb);
289 return NULL;
290}
291
292int bt_to_errno(__u16 code);
293
294extern int hci_sock_init(void);
295extern void hci_sock_cleanup(void);
296
297extern int bt_sysfs_init(void);
298extern void bt_sysfs_cleanup(void);
299
300extern 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 *));
303extern void bt_procfs_cleanup(struct net *net, const char *name);
304
305extern struct dentry *bt_debugfs;
306
307int l2cap_init(void);
308void l2cap_exit(void);
309
310int sco_init(void);
311void sco_exit(void);
312
313void bt_sock_reclassify_lock(struct sock *sk, int proto);
314
315#endif /* __BLUETOOTH_H */