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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#define BT_SUBSYS_VERSION 2
33#define BT_SUBSYS_REVISION 22
34
35#ifndef AF_BLUETOOTH
36#define AF_BLUETOOTH 31
37#define PF_BLUETOOTH AF_BLUETOOTH
38#endif
39
40
41#define BLUETOOTH_VER_1_1 1
42#define BLUETOOTH_VER_1_2 2
43#define BLUETOOTH_VER_2_0 3
44
45
46#define BT_SKB_RESERVE 8
47
48#define BTPROTO_L2CAP 0
49#define BTPROTO_HCI 1
50#define BTPROTO_SCO 2
51#define BTPROTO_RFCOMM 3
52#define BTPROTO_BNEP 4
53#define BTPROTO_CMTP 5
54#define BTPROTO_HIDP 6
55#define BTPROTO_AVDTP 7
56
57#define SOL_HCI 0
58#define SOL_L2CAP 6
59#define SOL_SCO 17
60#define SOL_RFCOMM 18
61
62#define BT_SECURITY 4
63struct bt_security {
64 __u8 level;
65 __u8 key_size;
66};
67#define BT_SECURITY_SDP 0
68#define BT_SECURITY_LOW 1
69#define BT_SECURITY_MEDIUM 2
70#define BT_SECURITY_HIGH 3
71#define BT_SECURITY_FIPS 4
72
73#define BT_DEFER_SETUP 7
74
75#define BT_FLUSHABLE 8
76
77#define BT_FLUSHABLE_OFF 0
78#define BT_FLUSHABLE_ON 1
79
80#define BT_POWER 9
81struct bt_power {
82 __u8 force_active;
83};
84#define BT_POWER_FORCE_ACTIVE_OFF 0
85#define BT_POWER_FORCE_ACTIVE_ON 1
86
87#define BT_CHANNEL_POLICY 10
88
89
90
91
92
93
94#define BT_CHANNEL_POLICY_BREDR_ONLY 0
95
96
97
98
99
100
101#define BT_CHANNEL_POLICY_BREDR_PREFERRED 1
102
103
104
105
106
107
108
109
110
111
112#define BT_CHANNEL_POLICY_AMP_PREFERRED 2
113
114#define BT_VOICE 11
115struct bt_voice {
116 __u16 setting;
117};
118
119#define BT_VOICE_TRANSPARENT 0x0003
120#define BT_VOICE_CVSD_16BIT 0x0060
121
122#define BT_SNDMTU 12
123#define BT_RCVMTU 13
124
125__printf(1, 2)
126void bt_info(const char *fmt, ...);
127__printf(1, 2)
128void bt_warn(const char *fmt, ...);
129__printf(1, 2)
130void bt_err(const char *fmt, ...);
131__printf(1, 2)
132void bt_err_ratelimited(const char *fmt, ...);
133
134#define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
135#define BT_WARN(fmt, ...) bt_warn(fmt "\n", ##__VA_ARGS__)
136#define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
137#define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
138
139#define BT_ERR_RATELIMITED(fmt, ...) bt_err_ratelimited(fmt "\n", ##__VA_ARGS__)
140
141#define bt_dev_info(hdev, fmt, ...) \
142 BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
143#define bt_dev_warn(hdev, fmt, ...) \
144 BT_WARN("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
145#define bt_dev_err(hdev, fmt, ...) \
146 BT_ERR("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
147#define bt_dev_dbg(hdev, fmt, ...) \
148 BT_DBG("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
149
150
151enum {
152 BT_CONNECTED = 1,
153 BT_OPEN,
154 BT_BOUND,
155 BT_LISTEN,
156 BT_CONNECT,
157 BT_CONNECT2,
158 BT_CONFIG,
159 BT_DISCONN,
160 BT_CLOSED
161};
162
163
164static inline const char *state_to_string(int state)
165{
166 switch (state) {
167 case BT_CONNECTED:
168 return "BT_CONNECTED";
169 case BT_OPEN:
170 return "BT_OPEN";
171 case BT_BOUND:
172 return "BT_BOUND";
173 case BT_LISTEN:
174 return "BT_LISTEN";
175 case BT_CONNECT:
176 return "BT_CONNECT";
177 case BT_CONNECT2:
178 return "BT_CONNECT2";
179 case BT_CONFIG:
180 return "BT_CONFIG";
181 case BT_DISCONN:
182 return "BT_DISCONN";
183 case BT_CLOSED:
184 return "BT_CLOSED";
185 }
186
187 return "invalid state";
188}
189
190
191typedef struct {
192 __u8 b[6];
193} __packed bdaddr_t;
194
195
196#define BDADDR_BREDR 0x00
197#define BDADDR_LE_PUBLIC 0x01
198#define BDADDR_LE_RANDOM 0x02
199
200static inline bool bdaddr_type_is_valid(__u8 type)
201{
202 switch (type) {
203 case BDADDR_BREDR:
204 case BDADDR_LE_PUBLIC:
205 case BDADDR_LE_RANDOM:
206 return true;
207 }
208
209 return false;
210}
211
212static inline bool bdaddr_type_is_le(__u8 type)
213{
214 switch (type) {
215 case BDADDR_LE_PUBLIC:
216 case BDADDR_LE_RANDOM:
217 return true;
218 }
219
220 return false;
221}
222
223#define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
224#define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}})
225
226
227static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
228{
229 return memcmp(ba1, ba2, sizeof(bdaddr_t));
230}
231static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
232{
233 memcpy(dst, src, sizeof(bdaddr_t));
234}
235
236void baswap(bdaddr_t *dst, bdaddr_t *src);
237
238
239
240#define bt_sk(__sk) ((struct bt_sock *) __sk)
241
242struct bt_sock {
243 struct sock sk;
244 struct list_head accept_q;
245 struct sock *parent;
246 unsigned long flags;
247 void (*skb_msg_name)(struct sk_buff *, void *, int *);
248};
249
250enum {
251 BT_SK_DEFER_SETUP,
252 BT_SK_SUSPEND,
253};
254
255struct bt_sock_list {
256 struct hlist_head head;
257 rwlock_t lock;
258#ifdef CONFIG_PROC_FS
259 int (* custom_seq_show)(struct seq_file *, void *);
260#endif
261};
262
263int bt_sock_register(int proto, const struct net_proto_family *ops);
264void bt_sock_unregister(int proto);
265void bt_sock_link(struct bt_sock_list *l, struct sock *s);
266void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
267int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
268 int flags);
269int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
270 size_t len, int flags);
271uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
272int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
273int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
274int bt_sock_wait_ready(struct sock *sk, unsigned long flags);
275
276void bt_accept_enqueue(struct sock *parent, struct sock *sk);
277void bt_accept_unlink(struct sock *sk);
278struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
279
280
281struct l2cap_ctrl {
282 __u8 sframe:1,
283 poll:1,
284 final:1,
285 fcs:1,
286 sar:2,
287 super:2;
288 __u16 reqseq;
289 __u16 txseq;
290 __u8 retries;
291 __le16 psm;
292 bdaddr_t bdaddr;
293 struct l2cap_chan *chan;
294};
295
296struct hci_dev;
297
298typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
299typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
300 u16 opcode, struct sk_buff *skb);
301
302#define HCI_REQ_START BIT(0)
303#define HCI_REQ_SKB BIT(1)
304
305struct hci_ctrl {
306 __u16 opcode;
307 u8 req_flags;
308 u8 req_event;
309 union {
310 hci_req_complete_t req_complete;
311 hci_req_complete_skb_t req_complete_skb;
312 };
313};
314
315struct bt_skb_cb {
316 __u8 pkt_type;
317 __u8 force_active;
318 __u16 expect;
319 __u8 incoming:1;
320 union {
321 struct l2cap_ctrl l2cap;
322 struct hci_ctrl hci;
323 };
324};
325#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
326
327#define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type
328#define hci_skb_expect(skb) bt_cb((skb))->expect
329#define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode
330
331static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
332{
333 struct sk_buff *skb;
334
335 skb = alloc_skb(len + BT_SKB_RESERVE, how);
336 if (skb)
337 skb_reserve(skb, BT_SKB_RESERVE);
338 return skb;
339}
340
341static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
342 unsigned long len, int nb, int *err)
343{
344 struct sk_buff *skb;
345
346 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
347 if (skb)
348 skb_reserve(skb, BT_SKB_RESERVE);
349
350 if (!skb && *err)
351 return NULL;
352
353 *err = sock_error(sk);
354 if (*err)
355 goto out;
356
357 if (sk->sk_shutdown) {
358 *err = -ECONNRESET;
359 goto out;
360 }
361
362 return skb;
363
364out:
365 kfree_skb(skb);
366 return NULL;
367}
368
369int bt_to_errno(__u16 code);
370
371void hci_sock_set_flag(struct sock *sk, int nr);
372void hci_sock_clear_flag(struct sock *sk, int nr);
373int hci_sock_test_flag(struct sock *sk, int nr);
374unsigned short hci_sock_get_channel(struct sock *sk);
375u32 hci_sock_get_cookie(struct sock *sk);
376
377int hci_sock_init(void);
378void hci_sock_cleanup(void);
379
380int bt_sysfs_init(void);
381void bt_sysfs_cleanup(void);
382
383int bt_procfs_init(struct net *net, const char *name,
384 struct bt_sock_list *sk_list,
385 int (*seq_show)(struct seq_file *, void *));
386void bt_procfs_cleanup(struct net *net, const char *name);
387
388extern struct dentry *bt_debugfs;
389
390int l2cap_init(void);
391void l2cap_exit(void);
392
393#if IS_ENABLED(CONFIG_BT_BREDR)
394int sco_init(void);
395void sco_exit(void);
396#else
397static inline int sco_init(void)
398{
399 return 0;
400}
401
402static inline void sco_exit(void)
403{
404}
405#endif
406
407int mgmt_init(void);
408void mgmt_exit(void);
409
410void bt_sock_reclassify_lock(struct sock *sk, int proto);
411
412#endif
413
