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rfcomm.h
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1 /*
2  RFCOMM implementation for Linux Bluetooth stack (BlueZ)
3  Copyright (C) 2002 Maxim Krasnyansky <[email protected]>
4  Copyright (C) 2002 Marcel Holtmann <[email protected]>
5 
6  This program is free software; you can redistribute it and/or modify
7  it under the terms of the GNU General Public License version 2 as
8  published by the Free Software Foundation;
9 
10  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
11  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
12  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
13  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
14  CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
15  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 
19  ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
20  COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
21  SOFTWARE IS DISCLAIMED.
22 */
23 
24 #ifndef __RFCOMM_H
25 #define __RFCOMM_H
26 
27 #define RFCOMM_PSM 3
28 
29 #define RFCOMM_CONN_TIMEOUT (HZ * 30)
30 #define RFCOMM_DISC_TIMEOUT (HZ * 20)
31 #define RFCOMM_AUTH_TIMEOUT (HZ * 25)
32 #define RFCOMM_IDLE_TIMEOUT (HZ * 2)
33 
34 #define RFCOMM_DEFAULT_MTU 127
35 #define RFCOMM_DEFAULT_CREDITS 7
36 
37 #define RFCOMM_MAX_L2CAP_MTU 1013
38 #define RFCOMM_MAX_CREDITS 40
39 
40 #define RFCOMM_SKB_HEAD_RESERVE 8
41 #define RFCOMM_SKB_TAIL_RESERVE 2
42 #define RFCOMM_SKB_RESERVE (RFCOMM_SKB_HEAD_RESERVE + RFCOMM_SKB_TAIL_RESERVE)
43 
44 #define RFCOMM_SABM 0x2f
45 #define RFCOMM_DISC 0x43
46 #define RFCOMM_UA 0x63
47 #define RFCOMM_DM 0x0f
48 #define RFCOMM_UIH 0xef
49 
50 #define RFCOMM_TEST 0x08
51 #define RFCOMM_FCON 0x28
52 #define RFCOMM_FCOFF 0x18
53 #define RFCOMM_MSC 0x38
54 #define RFCOMM_RPN 0x24
55 #define RFCOMM_RLS 0x14
56 #define RFCOMM_PN 0x20
57 #define RFCOMM_NSC 0x04
58 
59 #define RFCOMM_V24_FC 0x02
60 #define RFCOMM_V24_RTC 0x04
61 #define RFCOMM_V24_RTR 0x08
62 #define RFCOMM_V24_IC 0x40
63 #define RFCOMM_V24_DV 0x80
64 
65 #define RFCOMM_RPN_BR_2400 0x0
66 #define RFCOMM_RPN_BR_4800 0x1
67 #define RFCOMM_RPN_BR_7200 0x2
68 #define RFCOMM_RPN_BR_9600 0x3
69 #define RFCOMM_RPN_BR_19200 0x4
70 #define RFCOMM_RPN_BR_38400 0x5
71 #define RFCOMM_RPN_BR_57600 0x6
72 #define RFCOMM_RPN_BR_115200 0x7
73 #define RFCOMM_RPN_BR_230400 0x8
74 
75 #define RFCOMM_RPN_DATA_5 0x0
76 #define RFCOMM_RPN_DATA_6 0x1
77 #define RFCOMM_RPN_DATA_7 0x2
78 #define RFCOMM_RPN_DATA_8 0x3
79 
80 #define RFCOMM_RPN_STOP_1 0
81 #define RFCOMM_RPN_STOP_15 1
82 
83 #define RFCOMM_RPN_PARITY_NONE 0x0
84 #define RFCOMM_RPN_PARITY_ODD 0x1
85 #define RFCOMM_RPN_PARITY_EVEN 0x3
86 #define RFCOMM_RPN_PARITY_MARK 0x5
87 #define RFCOMM_RPN_PARITY_SPACE 0x7
88 
89 #define RFCOMM_RPN_FLOW_NONE 0x00
90 
91 #define RFCOMM_RPN_XON_CHAR 0x11
92 #define RFCOMM_RPN_XOFF_CHAR 0x13
93 
94 #define RFCOMM_RPN_PM_BITRATE 0x0001
95 #define RFCOMM_RPN_PM_DATA 0x0002
96 #define RFCOMM_RPN_PM_STOP 0x0004
97 #define RFCOMM_RPN_PM_PARITY 0x0008
98 #define RFCOMM_RPN_PM_PARITY_TYPE 0x0010
99 #define RFCOMM_RPN_PM_XON 0x0020
100 #define RFCOMM_RPN_PM_XOFF 0x0040
101 #define RFCOMM_RPN_PM_FLOW 0x3F00
102 
103 #define RFCOMM_RPN_PM_ALL 0x3F7F
104 
105 struct rfcomm_hdr {
108  u8 len; /* Actual size can be 2 bytes */
109 } __packed;
110 
111 struct rfcomm_cmd {
116 } __packed;
117 
118 struct rfcomm_mcc {
121 } __packed;
122 
123 struct rfcomm_pn {
131 } __packed;
132 
133 struct rfcomm_rpn {
141 } __packed;
142 
143 struct rfcomm_rls {
146 } __packed;
147 
148 struct rfcomm_msc {
151 } __packed;
152 
153 /* ---- Core structures, flags etc ---- */
154 
156  struct list_head list;
157  struct socket *sock;
159  unsigned long state;
160  unsigned long flags;
163 
164  /* Default DLC parameters */
165  int cfc;
167 
168  struct list_head dlcs;
169 };
170 
171 struct rfcomm_dlc {
172  struct list_head list;
176 
178  unsigned long state;
179  unsigned long flags;
191 
196 
197  void *owner;
198 
199  void (*data_ready)(struct rfcomm_dlc *d, struct sk_buff *skb);
200  void (*state_change)(struct rfcomm_dlc *d, int err);
202 };
203 
204 /* DLC and session flags */
205 #define RFCOMM_RX_THROTTLED 0
206 #define RFCOMM_TX_THROTTLED 1
207 #define RFCOMM_TIMED_OUT 2
208 #define RFCOMM_MSC_PENDING 3
209 #define RFCOMM_SEC_PENDING 4
210 #define RFCOMM_AUTH_PENDING 5
211 #define RFCOMM_AUTH_ACCEPT 6
212 #define RFCOMM_AUTH_REJECT 7
213 #define RFCOMM_DEFER_SETUP 8
214 #define RFCOMM_ENC_DROP 9
215 
216 /* Scheduling flags and events */
217 #define RFCOMM_SCHED_WAKEUP 31
218 
219 /* MSC exchange flags */
220 #define RFCOMM_MSCEX_TX 1
221 #define RFCOMM_MSCEX_RX 2
222 #define RFCOMM_MSCEX_OK (RFCOMM_MSCEX_TX + RFCOMM_MSCEX_RX)
223 
224 /* CFC states */
225 #define RFCOMM_CFC_UNKNOWN -1
226 #define RFCOMM_CFC_DISABLED 0
227 #define RFCOMM_CFC_ENABLED RFCOMM_MAX_CREDITS
228 
229 /* ---- RFCOMM SEND RPN ---- */
230 int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci,
231  u8 bit_rate, u8 data_bits, u8 stop_bits,
232  u8 parity, u8 flow_ctrl_settings,
233  u8 xon_char, u8 xoff_char, u16 param_mask);
234 
235 /* ---- RFCOMM DLCs (channels) ---- */
237 void rfcomm_dlc_free(struct rfcomm_dlc *d);
238 int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst,
239  u8 channel);
240 int rfcomm_dlc_close(struct rfcomm_dlc *d, int reason);
241 int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb);
244 void rfcomm_dlc_accept(struct rfcomm_dlc *d);
245 
246 #define rfcomm_dlc_lock(d) spin_lock(&d->lock)
247 #define rfcomm_dlc_unlock(d) spin_unlock(&d->lock)
248 
249 static inline void rfcomm_dlc_hold(struct rfcomm_dlc *d)
250 {
251  atomic_inc(&d->refcnt);
252 }
253 
254 static inline void rfcomm_dlc_put(struct rfcomm_dlc *d)
255 {
256  if (atomic_dec_and_test(&d->refcnt))
257  rfcomm_dlc_free(d);
258 }
259 
260 extern void __rfcomm_dlc_throttle(struct rfcomm_dlc *d);
261 extern void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d);
262 
263 static inline void rfcomm_dlc_throttle(struct rfcomm_dlc *d)
264 {
267 }
268 
269 static inline void rfcomm_dlc_unthrottle(struct rfcomm_dlc *d)
270 {
273 }
274 
275 /* ---- RFCOMM sessions ---- */
276 void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src,
277  bdaddr_t *dst);
278 
279 static inline void rfcomm_session_hold(struct rfcomm_session *s)
280 {
281  atomic_inc(&s->refcnt);
282 }
283 
284 /* ---- RFCOMM sockets ---- */
285 struct sockaddr_rc {
287  bdaddr_t rc_bdaddr;
289 };
290 
291 #define RFCOMM_CONNINFO 0x02
295 };
296 
297 #define RFCOMM_LM 0x03
298 #define RFCOMM_LM_MASTER 0x0001
299 #define RFCOMM_LM_AUTH 0x0002
300 #define RFCOMM_LM_ENCRYPT 0x0004
301 #define RFCOMM_LM_TRUSTED 0x0008
302 #define RFCOMM_LM_RELIABLE 0x0010
303 #define RFCOMM_LM_SECURE 0x0020
304 
305 #define rfcomm_pi(sk) ((struct rfcomm_pinfo *) sk)
306 
307 struct rfcomm_pinfo {
308  struct bt_sock bt;
309  struct rfcomm_dlc *dlc;
313 };
314 
315 int rfcomm_init_sockets(void);
316 void rfcomm_cleanup_sockets(void);
317 
319  struct rfcomm_dlc **d);
320 
321 /* ---- RFCOMM TTY ---- */
322 #define RFCOMM_MAX_DEV 256
323 
324 #define RFCOMMCREATEDEV _IOW('R', 200, int)
325 #define RFCOMMRELEASEDEV _IOW('R', 201, int)
326 #define RFCOMMGETDEVLIST _IOR('R', 210, int)
327 #define RFCOMMGETDEVINFO _IOR('R', 211, int)
328 #define RFCOMMSTEALDLC _IOW('R', 220, int)
329 
330 #define RFCOMM_REUSE_DLC 0
331 #define RFCOMM_RELEASE_ONHUP 1
332 #define RFCOMM_HANGUP_NOW 2
333 #define RFCOMM_TTY_ATTACHED 3
334 #define RFCOMM_TTY_RELEASED 4
335 
339  bdaddr_t src;
340  bdaddr_t dst;
342 };
343 
348  bdaddr_t src;
349  bdaddr_t dst;
351 };
352 
356 };
357 
358 int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
359 
360 #ifdef CONFIG_BT_RFCOMM_TTY
361 int rfcomm_init_ttys(void);
362 void rfcomm_cleanup_ttys(void);
363 #else
364 static inline int rfcomm_init_ttys(void)
365 {
366  return 0;
367 }
368 static inline void rfcomm_cleanup_ttys(void)
369 {
370 }
371 #endif
372 #endif /* __RFCOMM_H */