1 /*
2 RFCOMM implementation for Linux Bluetooth stack (BlueZ).
3 Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
4 Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org>
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 /*
25 RPN support - Dirk Husemann <hud@zurich.ibm.com>
26 */
27
28 /*
29 * $Id: rfcomm.h,v 1.31 2002/10/18 20:12:11 maxk Exp $
30 */
31
32 #ifndef __RFCOMM_H
33 #define __RFCOMM_H
34
35 #define RFCOMM_PSM 3
36
37 #define RFCOMM_CONN_TIMEOUT (HZ * 30)
38 #define RFCOMM_DISC_TIMEOUT (HZ * 20)
39
40 #define RFCOMM_DEFAULT_MTU 127
41 #define RFCOMM_DEFAULT_CREDITS 7
42
43 #define RFCOMM_MAX_L2CAP_MTU 1024
44 #define RFCOMM_MAX_CREDITS 40
45
46 #define RFCOMM_SKB_HEAD_RESERVE 8
47 #define RFCOMM_SKB_TAIL_RESERVE 2
48 #define RFCOMM_SKB_RESERVE (RFCOMM_SKB_HEAD_RESERVE + RFCOMM_SKB_TAIL_RESERVE)
49
50 #define RFCOMM_SABM 0x2f
51 #define RFCOMM_DISC 0x43
52 #define RFCOMM_UA 0x63
53 #define RFCOMM_DM 0x0f
54 #define RFCOMM_UIH 0xef
55
56 #define RFCOMM_TEST 0x08
57 #define RFCOMM_FCON 0x28
58 #define RFCOMM_FCOFF 0x18
59 #define RFCOMM_MSC 0x38
60 #define RFCOMM_RPN 0x24
61 #define RFCOMM_RLS 0x14
62 #define RFCOMM_PN 0x20
63 #define RFCOMM_NSC 0x04
64
65 #define RFCOMM_V24_FC 0x02
66 #define RFCOMM_V24_RTC 0x04
67 #define RFCOMM_V24_RTR 0x08
68 #define RFCOMM_V24_IC 0x40
69 #define RFCOMM_V24_DV 0x80
70
71 #define RFCOMM_RPN_BR_2400 0x0
72 #define RFCOMM_RPN_BR_4800 0x1
73 #define RFCOMM_RPN_BR_7200 0x2
74 #define RFCOMM_RPN_BR_9600 0x3
75 #define RFCOMM_RPN_BR_19200 0x4
76 #define RFCOMM_RPN_BR_38400 0x5
77 #define RFCOMM_RPN_BR_57600 0x6
78 #define RFCOMM_RPN_BR_115200 0x7
79 #define RFCOMM_RPN_BR_230400 0x8
80
81 #define RFCOMM_RPN_DATA_5 0x0
82 #define RFCOMM_RPN_DATA_6 0x1
83 #define RFCOMM_RPN_DATA_7 0x2
84 #define RFCOMM_RPN_DATA_8 0x3
85
86 #define RFCOMM_RPN_STOP_1 0
87 #define RFCOMM_RPN_STOP_15 1
88
89 #define RFCOMM_RPN_PARITY_NONE 0x0
90 #define RFCOMM_RPN_PARITY_ODD 0x4
91 #define RFCOMM_RPN_PARITY_EVEN 0x5
92 #define RFCOMM_RPN_PARITY_MARK 0x6
93 #define RFCOMM_RPN_PARITY_SPACE 0x7
94
95 #define RFCOMM_RPN_FLOW_NONE 0x00
96
97 #define RFCOMM_RPN_XON_CHAR 0x11
98 #define RFCOMM_RPN_XOFF_CHAR 0x13
99
100 #define RFCOMM_RPN_PM_BITRATE 0x0001
101 #define RFCOMM_RPN_PM_DATA 0x0002
102 #define RFCOMM_RPN_PM_STOP 0x0004
103 #define RFCOMM_RPN_PM_PARITY 0x0008
104 #define RFCOMM_RPN_PM_PARITY_TYPE 0x0010
105 #define RFCOMM_RPN_PM_XON 0x0020
106 #define RFCOMM_RPN_PM_XOFF 0x0040
107 #define RFCOMM_RPN_PM_FLOW 0x3F00
108
109 #define RFCOMM_RPN_PM_ALL 0x3F7F
110
111 struct rfcomm_hdr {
112 u8 addr;
113 u8 ctrl;
114 u8 len; // Actual size can be 2 bytes
115 } __attribute__ ((packed));
116
117 struct rfcomm_cmd {
118 u8 addr;
119 u8 ctrl;
120 u8 len;
121 u8 fcs;
122 } __attribute__ ((packed));
123
124 struct rfcomm_mcc {
125 u8 type;
126 u8 len;
127 } __attribute__ ((packed));
128
129 struct rfcomm_pn {
130 u8 dlci;
131 u8 flow_ctrl;
132 u8 priority;
133 u8 ack_timer;
134 u16 mtu;
135 u8 max_retrans;
136 u8 credits;
137 } __attribute__ ((packed));
138
139 struct rfcomm_rpn {
140 u8 dlci;
141 u8 bit_rate;
142 u8 line_settings;
143 u8 flow_ctrl;
144 u8 xon_char;
145 u8 xoff_char;
146 u16 param_mask;
147 } __attribute__ ((packed));
148
149 struct rfcomm_rls {
150 u8 dlci;
151 u8 status;
152 } __attribute__ ((packed));
153
154 struct rfcomm_msc {
155 u8 dlci;
156 u8 v24_sig;
157 } __attribute__ ((packed));
158
159 /* ---- Core structures, flags etc ---- */
160
161 struct rfcomm_session {
162 struct list_head list;
163 struct socket *sock;
164 unsigned long state;
165 unsigned long flags;
166 atomic_t refcnt;
167 int initiator;
168
169 /* Default DLC parameters */
170 int cfc;
171 uint mtu;
172
173 struct list_head dlcs;
174 };
175
176 struct rfcomm_dlc {
177 struct list_head list;
178 struct rfcomm_session *session;
179 struct sk_buff_head tx_queue;
180 struct timer_list timer;
181
182 spinlock_t lock;
183 unsigned long state;
184 unsigned long flags;
185 atomic_t refcnt;
186 u8 dlci;
187 u8 addr;
188 u8 priority;
189 u8 v24_sig;
190 u8 mscex;
191
192 uint mtu;
193 uint cfc;
194 uint rx_credits;
195 uint tx_credits;
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);
201 void (*modem_status)(struct rfcomm_dlc *d, u8 v24_sig);
202 };
203
204 /* DLC and session flags */
205 #define RFCOMM_RX_THROTTLED 0
206 #define RFCOMM_TX_THROTTLED 1
207 #define RFCOMM_MSC_PENDING 2
208 #define RFCOMM_TIMED_OUT 3
209
210 /* Scheduling flags and events */
211 #define RFCOMM_SCHED_STATE 0
212 #define RFCOMM_SCHED_RX 1
213 #define RFCOMM_SCHED_TX 2
214 #define RFCOMM_SCHED_TIMEO 3
215 #define RFCOMM_SCHED_WAKEUP 31
216
217 /* MSC exchange flags */
218 #define RFCOMM_MSCEX_TX 1
219 #define RFCOMM_MSCEX_RX 2
220 #define RFCOMM_MSCEX_OK (RFCOMM_MSCEX_TX + RFCOMM_MSCEX_RX)
221
222 /* CFC states */
223 #define RFCOMM_CFC_UNKNOWN -1
224 #define RFCOMM_CFC_DISABLED 0
225 #define RFCOMM_CFC_ENABLED RFCOMM_MAX_CREDITS
226
227 extern struct task_struct *rfcomm_thread;
228 extern unsigned long rfcomm_event;
229
rfcomm_schedule(uint event)230 static inline void rfcomm_schedule(uint event)
231 {
232 if (!rfcomm_thread)
233 return;
234 set_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event);
235 wake_up_process(rfcomm_thread);
236 }
237
238 extern struct semaphore rfcomm_sem;
239 #define rfcomm_lock() down(&rfcomm_sem);
240 #define rfcomm_unlock() up(&rfcomm_sem);
241
242 /* ---- RFCOMM DLCs (channels) ---- */
243 struct rfcomm_dlc *rfcomm_dlc_alloc(int prio);
244 void rfcomm_dlc_free(struct rfcomm_dlc *d);
245 int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel);
246 int rfcomm_dlc_close(struct rfcomm_dlc *d, int reason);
247 int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb);
248 int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig);
249 int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig);
250
251 #define rfcomm_dlc_lock(d) spin_lock(&d->lock)
252 #define rfcomm_dlc_unlock(d) spin_unlock(&d->lock)
253
rfcomm_dlc_hold(struct rfcomm_dlc * d)254 static inline void rfcomm_dlc_hold(struct rfcomm_dlc *d)
255 {
256 atomic_inc(&d->refcnt);
257 }
258
rfcomm_dlc_put(struct rfcomm_dlc * d)259 static inline void rfcomm_dlc_put(struct rfcomm_dlc *d)
260 {
261 if (atomic_dec_and_test(&d->refcnt))
262 rfcomm_dlc_free(d);
263 }
264
265 extern void FASTCALL(__rfcomm_dlc_throttle(struct rfcomm_dlc *d));
266 extern void FASTCALL(__rfcomm_dlc_unthrottle(struct rfcomm_dlc *d));
267
rfcomm_dlc_throttle(struct rfcomm_dlc * d)268 static inline void rfcomm_dlc_throttle(struct rfcomm_dlc *d)
269 {
270 if (!test_and_set_bit(RFCOMM_RX_THROTTLED, &d->flags))
271 __rfcomm_dlc_throttle(d);
272 }
273
rfcomm_dlc_unthrottle(struct rfcomm_dlc * d)274 static inline void rfcomm_dlc_unthrottle(struct rfcomm_dlc *d)
275 {
276 if (test_and_clear_bit(RFCOMM_RX_THROTTLED, &d->flags))
277 __rfcomm_dlc_unthrottle(d);
278 }
279
280 /* ---- RFCOMM sessions ---- */
281 struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state);
282 struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst);
283 struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, bdaddr_t *dst, int *err);
284 void rfcomm_session_del(struct rfcomm_session *s);
285 void rfcomm_session_close(struct rfcomm_session *s, int err);
286 void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst);
287
rfcomm_session_hold(struct rfcomm_session * s)288 static inline void rfcomm_session_hold(struct rfcomm_session *s)
289 {
290 atomic_inc(&s->refcnt);
291 }
292
rfcomm_session_put(struct rfcomm_session * s)293 static inline void rfcomm_session_put(struct rfcomm_session *s)
294 {
295 if (atomic_dec_and_test(&s->refcnt))
296 rfcomm_session_del(s);
297 }
298
299 /* ---- RFCOMM chechsum ---- */
300 extern u8 rfcomm_crc_table[];
301
302 /* ---- RFCOMM sockets ---- */
303 struct sockaddr_rc {
304 sa_family_t rc_family;
305 bdaddr_t rc_bdaddr;
306 u8 rc_channel;
307 };
308
309 #define rfcomm_pi(sk) ((struct rfcomm_pinfo *) &sk->tp_pinfo)
310
311 struct rfcomm_pinfo {
312 struct rfcomm_dlc *dlc;
313 u8 channel;
314 };
315
316 int rfcomm_init_sockets(void);
317 void rfcomm_cleanup_sockets(void);
318
319 int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, 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
335 struct rfcomm_dev_req {
336 s16 dev_id;
337 u32 flags;
338 bdaddr_t src;
339 bdaddr_t dst;
340 u8 channel;
341 };
342
343 struct rfcomm_dev_info {
344 s16 id;
345 u32 flags;
346 u16 state;
347 bdaddr_t src;
348 bdaddr_t dst;
349 u8 channel;
350 };
351
352 struct rfcomm_dev_list_req {
353 u16 dev_num;
354 struct rfcomm_dev_info dev_info[0];
355 };
356
357 int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg);
358 int rfcomm_init_ttys(void);
359 void rfcomm_cleanup_ttys(void);
360
361 #endif /* __RFCOMM_H */
362