1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
5 Copyright (C) 2010 Google Inc.
6
7 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License version 2 as
11 published by the Free Software Foundation;
12
13 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
14 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
16 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
17 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
18 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21
22 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
23 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
24 SOFTWARE IS DISCLAIMED.
25 */
26
27 #ifndef __L2CAP_H
28 #define __L2CAP_H
29
30 #include <asm/unaligned.h>
31
32 /* L2CAP defaults */
33 #define L2CAP_DEFAULT_MTU 672
34 #define L2CAP_DEFAULT_MIN_MTU 48
35 #define L2CAP_DEFAULT_FLUSH_TO 0xffff
36 #define L2CAP_DEFAULT_TX_WINDOW 63
37 #define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF
38 #define L2CAP_DEFAULT_MAX_TX 3
39 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */
40 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
41 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1009 /* Sized for 3-DH5 packet */
42 #define L2CAP_DEFAULT_ACK_TO 200
43 #define L2CAP_LE_DEFAULT_MTU 23
44 #define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF
45 #define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF
46 #define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF
47
48 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100)
49 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000)
50 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000)
51 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000)
52 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000)
53
54 /* L2CAP socket address */
55 struct sockaddr_l2 {
56 sa_family_t l2_family;
57 __le16 l2_psm;
58 bdaddr_t l2_bdaddr;
59 __le16 l2_cid;
60 };
61
62 /* L2CAP socket options */
63 #define L2CAP_OPTIONS 0x01
64 struct l2cap_options {
65 __u16 omtu;
66 __u16 imtu;
67 __u16 flush_to;
68 __u8 mode;
69 __u8 fcs;
70 __u8 max_tx;
71 __u16 txwin_size;
72 };
73
74 #define L2CAP_CONNINFO 0x02
75 struct l2cap_conninfo {
76 __u16 hci_handle;
77 __u8 dev_class[3];
78 };
79
80 #define L2CAP_LM 0x03
81 #define L2CAP_LM_MASTER 0x0001
82 #define L2CAP_LM_AUTH 0x0002
83 #define L2CAP_LM_ENCRYPT 0x0004
84 #define L2CAP_LM_TRUSTED 0x0008
85 #define L2CAP_LM_RELIABLE 0x0010
86 #define L2CAP_LM_SECURE 0x0020
87
88 /* L2CAP command codes */
89 #define L2CAP_COMMAND_REJ 0x01
90 #define L2CAP_CONN_REQ 0x02
91 #define L2CAP_CONN_RSP 0x03
92 #define L2CAP_CONF_REQ 0x04
93 #define L2CAP_CONF_RSP 0x05
94 #define L2CAP_DISCONN_REQ 0x06
95 #define L2CAP_DISCONN_RSP 0x07
96 #define L2CAP_ECHO_REQ 0x08
97 #define L2CAP_ECHO_RSP 0x09
98 #define L2CAP_INFO_REQ 0x0a
99 #define L2CAP_INFO_RSP 0x0b
100 #define L2CAP_CREATE_CHAN_REQ 0x0c
101 #define L2CAP_CREATE_CHAN_RSP 0x0d
102 #define L2CAP_MOVE_CHAN_REQ 0x0e
103 #define L2CAP_MOVE_CHAN_RSP 0x0f
104 #define L2CAP_MOVE_CHAN_CFM 0x10
105 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11
106 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
107 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
108
109 /* L2CAP extended feature mask */
110 #define L2CAP_FEAT_FLOWCTL 0x00000001
111 #define L2CAP_FEAT_RETRANS 0x00000002
112 #define L2CAP_FEAT_BIDIR_QOS 0x00000004
113 #define L2CAP_FEAT_ERTM 0x00000008
114 #define L2CAP_FEAT_STREAMING 0x00000010
115 #define L2CAP_FEAT_FCS 0x00000020
116 #define L2CAP_FEAT_EXT_FLOW 0x00000040
117 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
118 #define L2CAP_FEAT_EXT_WINDOW 0x00000100
119 #define L2CAP_FEAT_UCD 0x00000200
120
121 /* L2CAP checksum option */
122 #define L2CAP_FCS_NONE 0x00
123 #define L2CAP_FCS_CRC16 0x01
124
125 /* L2CAP fixed channels */
126 #define L2CAP_FC_L2CAP 0x02
127 #define L2CAP_FC_A2MP 0x08
128
129 /* L2CAP Control Field bit masks */
130 #define L2CAP_CTRL_SAR 0xC000
131 #define L2CAP_CTRL_REQSEQ 0x3F00
132 #define L2CAP_CTRL_TXSEQ 0x007E
133 #define L2CAP_CTRL_SUPERVISE 0x000C
134
135 #define L2CAP_CTRL_RETRANS 0x0080
136 #define L2CAP_CTRL_FINAL 0x0080
137 #define L2CAP_CTRL_POLL 0x0010
138 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
139
140 #define L2CAP_CTRL_TXSEQ_SHIFT 1
141 #define L2CAP_CTRL_SUPER_SHIFT 2
142 #define L2CAP_CTRL_REQSEQ_SHIFT 8
143 #define L2CAP_CTRL_SAR_SHIFT 14
144
145 /* L2CAP Extended Control Field bit mask */
146 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
147 #define L2CAP_EXT_CTRL_SAR 0x00030000
148 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
149 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
150
151 #define L2CAP_EXT_CTRL_POLL 0x00040000
152 #define L2CAP_EXT_CTRL_FINAL 0x00000002
153 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
154
155 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
156 #define L2CAP_EXT_CTRL_SAR_SHIFT 16
157 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16
158 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
159
160 /* L2CAP Supervisory Function */
161 #define L2CAP_SUPER_RR 0x00
162 #define L2CAP_SUPER_REJ 0x01
163 #define L2CAP_SUPER_RNR 0x02
164 #define L2CAP_SUPER_SREJ 0x03
165
166 /* L2CAP Segmentation and Reassembly */
167 #define L2CAP_SAR_UNSEGMENTED 0x00
168 #define L2CAP_SAR_START 0x01
169 #define L2CAP_SAR_END 0x02
170 #define L2CAP_SAR_CONTINUE 0x03
171
172 /* L2CAP Command rej. reasons */
173 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
174 #define L2CAP_REJ_MTU_EXCEEDED 0x0001
175 #define L2CAP_REJ_INVALID_CID 0x0002
176
177 /* L2CAP structures */
178 struct l2cap_hdr {
179 __le16 len;
180 __le16 cid;
181 } __packed;
182 #define L2CAP_HDR_SIZE 4
183 #define L2CAP_ENH_HDR_SIZE 6
184 #define L2CAP_EXT_HDR_SIZE 8
185
186 #define L2CAP_FCS_SIZE 2
187 #define L2CAP_SDULEN_SIZE 2
188 #define L2CAP_PSMLEN_SIZE 2
189
190 struct l2cap_cmd_hdr {
191 __u8 code;
192 __u8 ident;
193 __le16 len;
194 } __packed;
195 #define L2CAP_CMD_HDR_SIZE 4
196
197 struct l2cap_cmd_rej_unk {
198 __le16 reason;
199 } __packed;
200
201 struct l2cap_cmd_rej_mtu {
202 __le16 reason;
203 __le16 max_mtu;
204 } __packed;
205
206 struct l2cap_cmd_rej_cid {
207 __le16 reason;
208 __le16 scid;
209 __le16 dcid;
210 } __packed;
211
212 struct l2cap_conn_req {
213 __le16 psm;
214 __le16 scid;
215 } __packed;
216
217 struct l2cap_conn_rsp {
218 __le16 dcid;
219 __le16 scid;
220 __le16 result;
221 __le16 status;
222 } __packed;
223
224 /* channel indentifier */
225 #define L2CAP_CID_SIGNALING 0x0001
226 #define L2CAP_CID_CONN_LESS 0x0002
227 #define L2CAP_CID_LE_DATA 0x0004
228 #define L2CAP_CID_LE_SIGNALING 0x0005
229 #define L2CAP_CID_SMP 0x0006
230 #define L2CAP_CID_DYN_START 0x0040
231 #define L2CAP_CID_DYN_END 0xffff
232
233 /* connect/create channel results */
234 #define L2CAP_CR_SUCCESS 0x0000
235 #define L2CAP_CR_PEND 0x0001
236 #define L2CAP_CR_BAD_PSM 0x0002
237 #define L2CAP_CR_SEC_BLOCK 0x0003
238 #define L2CAP_CR_NO_MEM 0x0004
239 #define L2CAP_CR_BAD_AMP 0x0005
240
241 /* connect/create channel status */
242 #define L2CAP_CS_NO_INFO 0x0000
243 #define L2CAP_CS_AUTHEN_PEND 0x0001
244 #define L2CAP_CS_AUTHOR_PEND 0x0002
245
246 struct l2cap_conf_req {
247 __le16 dcid;
248 __le16 flags;
249 __u8 data[0];
250 } __packed;
251
252 struct l2cap_conf_rsp {
253 __le16 scid;
254 __le16 flags;
255 __le16 result;
256 __u8 data[0];
257 } __packed;
258
259 #define L2CAP_CONF_SUCCESS 0x0000
260 #define L2CAP_CONF_UNACCEPT 0x0001
261 #define L2CAP_CONF_REJECT 0x0002
262 #define L2CAP_CONF_UNKNOWN 0x0003
263 #define L2CAP_CONF_PENDING 0x0004
264 #define L2CAP_CONF_EFS_REJECT 0x0005
265
266 struct l2cap_conf_opt {
267 __u8 type;
268 __u8 len;
269 __u8 val[0];
270 } __packed;
271 #define L2CAP_CONF_OPT_SIZE 2
272
273 #define L2CAP_CONF_HINT 0x80
274 #define L2CAP_CONF_MASK 0x7f
275
276 #define L2CAP_CONF_MTU 0x01
277 #define L2CAP_CONF_FLUSH_TO 0x02
278 #define L2CAP_CONF_QOS 0x03
279 #define L2CAP_CONF_RFC 0x04
280 #define L2CAP_CONF_FCS 0x05
281 #define L2CAP_CONF_EFS 0x06
282 #define L2CAP_CONF_EWS 0x07
283
284 #define L2CAP_CONF_MAX_SIZE 22
285
286 struct l2cap_conf_rfc {
287 __u8 mode;
288 __u8 txwin_size;
289 __u8 max_transmit;
290 __le16 retrans_timeout;
291 __le16 monitor_timeout;
292 __le16 max_pdu_size;
293 } __packed;
294
295 #define L2CAP_MODE_BASIC 0x00
296 #define L2CAP_MODE_RETRANS 0x01
297 #define L2CAP_MODE_FLOWCTL 0x02
298 #define L2CAP_MODE_ERTM 0x03
299 #define L2CAP_MODE_STREAMING 0x04
300
301 struct l2cap_conf_efs {
302 __u8 id;
303 __u8 stype;
304 __le16 msdu;
305 __le32 sdu_itime;
306 __le32 acc_lat;
307 __le32 flush_to;
308 } __packed;
309
310 #define L2CAP_SERV_NOTRAFIC 0x00
311 #define L2CAP_SERV_BESTEFFORT 0x01
312 #define L2CAP_SERV_GUARANTEED 0x02
313
314 #define L2CAP_BESTEFFORT_ID 0x01
315
316 struct l2cap_disconn_req {
317 __le16 dcid;
318 __le16 scid;
319 } __packed;
320
321 struct l2cap_disconn_rsp {
322 __le16 dcid;
323 __le16 scid;
324 } __packed;
325
326 struct l2cap_info_req {
327 __le16 type;
328 } __packed;
329
330 struct l2cap_info_rsp {
331 __le16 type;
332 __le16 result;
333 __u8 data[0];
334 } __packed;
335
336 struct l2cap_create_chan_req {
337 __le16 psm;
338 __le16 scid;
339 __u8 amp_id;
340 } __packed;
341
342 struct l2cap_create_chan_rsp {
343 __le16 dcid;
344 __le16 scid;
345 __le16 result;
346 __le16 status;
347 } __packed;
348
349 struct l2cap_move_chan_req {
350 __le16 icid;
351 __u8 dest_amp_id;
352 } __packed;
353
354 struct l2cap_move_chan_rsp {
355 __le16 icid;
356 __le16 result;
357 } __packed;
358
359 #define L2CAP_MR_SUCCESS 0x0000
360 #define L2CAP_MR_PEND 0x0001
361 #define L2CAP_MR_BAD_ID 0x0002
362 #define L2CAP_MR_SAME_ID 0x0003
363 #define L2CAP_MR_NOT_SUPP 0x0004
364 #define L2CAP_MR_COLLISION 0x0005
365 #define L2CAP_MR_NOT_ALLOWED 0x0006
366
367 struct l2cap_move_chan_cfm {
368 __le16 icid;
369 __le16 result;
370 } __packed;
371
372 #define L2CAP_MC_CONFIRMED 0x0000
373 #define L2CAP_MC_UNCONFIRMED 0x0001
374
375 struct l2cap_move_chan_cfm_rsp {
376 __le16 icid;
377 } __packed;
378
379 /* info type */
380 #define L2CAP_IT_CL_MTU 0x0001
381 #define L2CAP_IT_FEAT_MASK 0x0002
382 #define L2CAP_IT_FIXED_CHAN 0x0003
383
384 /* info result */
385 #define L2CAP_IR_SUCCESS 0x0000
386 #define L2CAP_IR_NOTSUPP 0x0001
387
388 struct l2cap_conn_param_update_req {
389 __le16 min;
390 __le16 max;
391 __le16 latency;
392 __le16 to_multiplier;
393 } __packed;
394
395 struct l2cap_conn_param_update_rsp {
396 __le16 result;
397 } __packed;
398
399 /* Connection Parameters result */
400 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000
401 #define L2CAP_CONN_PARAM_REJECTED 0x0001
402
403 /* ----- L2CAP channels and connections ----- */
404 struct srej_list {
405 __u16 tx_seq;
406 struct list_head list;
407 };
408
409 struct l2cap_chan {
410 struct sock *sk;
411
412 struct l2cap_conn *conn;
413
414 __u8 state;
415
416 atomic_t refcnt;
417
418 __le16 psm;
419 __u16 dcid;
420 __u16 scid;
421
422 __u16 imtu;
423 __u16 omtu;
424 __u16 flush_to;
425 __u8 mode;
426 __u8 chan_type;
427 __u8 chan_policy;
428
429 __le16 sport;
430
431 __u8 sec_level;
432
433 __u8 ident;
434
435 __u8 conf_req[64];
436 __u8 conf_len;
437 __u8 num_conf_req;
438 __u8 num_conf_rsp;
439
440 __u8 fcs;
441
442 __u16 tx_win;
443 __u16 tx_win_max;
444 __u8 max_tx;
445 __u16 retrans_timeout;
446 __u16 monitor_timeout;
447 __u16 mps;
448
449 unsigned long conf_state;
450 unsigned long conn_state;
451 unsigned long flags;
452
453 __u16 next_tx_seq;
454 __u16 expected_ack_seq;
455 __u16 expected_tx_seq;
456 __u16 buffer_seq;
457 __u16 buffer_seq_srej;
458 __u16 srej_save_reqseq;
459 __u16 frames_sent;
460 __u16 unacked_frames;
461 __u8 retry_count;
462 __u8 num_acked;
463 __u16 sdu_len;
464 struct sk_buff *sdu;
465 struct sk_buff *sdu_last_frag;
466
467 __u16 remote_tx_win;
468 __u8 remote_max_tx;
469 __u16 remote_mps;
470
471 __u8 local_id;
472 __u8 local_stype;
473 __u16 local_msdu;
474 __u32 local_sdu_itime;
475 __u32 local_acc_lat;
476 __u32 local_flush_to;
477
478 __u8 remote_id;
479 __u8 remote_stype;
480 __u16 remote_msdu;
481 __u32 remote_sdu_itime;
482 __u32 remote_acc_lat;
483 __u32 remote_flush_to;
484
485 struct delayed_work chan_timer;
486 struct delayed_work retrans_timer;
487 struct delayed_work monitor_timer;
488 struct delayed_work ack_timer;
489
490 struct sk_buff *tx_send_head;
491 struct sk_buff_head tx_q;
492 struct sk_buff_head srej_q;
493 struct list_head srej_l;
494
495 struct list_head list;
496 struct list_head global_l;
497
498 void *data;
499 struct l2cap_ops *ops;
500 struct mutex lock;
501 };
502
503 struct l2cap_ops {
504 char *name;
505
506 struct l2cap_chan *(*new_connection) (void *data);
507 int (*recv) (void *data, struct sk_buff *skb);
508 void (*close) (void *data);
509 void (*state_change) (void *data, int state);
510 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
511 unsigned long len, int nb, int *err);
512
513 };
514
515 struct l2cap_conn {
516 struct hci_conn *hcon;
517 struct hci_chan *hchan;
518
519 bdaddr_t *dst;
520 bdaddr_t *src;
521
522 unsigned int mtu;
523
524 __u32 feat_mask;
525 __u8 fixed_chan_mask;
526
527 __u8 info_state;
528 __u8 info_ident;
529
530 struct delayed_work info_timer;
531
532 spinlock_t lock;
533
534 struct sk_buff *rx_skb;
535 __u32 rx_len;
536 __u8 tx_ident;
537
538 __u8 disc_reason;
539
540 struct delayed_work security_timer;
541 struct smp_chan *smp_chan;
542
543 struct list_head chan_l;
544 struct mutex chan_lock;
545 };
546
547 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
548 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
549 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
550
551 #define L2CAP_CHAN_RAW 1
552 #define L2CAP_CHAN_CONN_LESS 2
553 #define L2CAP_CHAN_CONN_ORIENTED 3
554
555 /* ----- L2CAP socket info ----- */
556 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
557
558 struct l2cap_pinfo {
559 struct bt_sock bt;
560 struct l2cap_chan *chan;
561 struct sk_buff *rx_busy_skb;
562 };
563
564 enum {
565 CONF_REQ_SENT,
566 CONF_INPUT_DONE,
567 CONF_OUTPUT_DONE,
568 CONF_MTU_DONE,
569 CONF_MODE_DONE,
570 CONF_CONNECT_PEND,
571 CONF_NO_FCS_RECV,
572 CONF_STATE2_DEVICE,
573 CONF_EWS_RECV,
574 CONF_LOC_CONF_PEND,
575 CONF_REM_CONF_PEND,
576 };
577
578 #define L2CAP_CONF_MAX_CONF_REQ 2
579 #define L2CAP_CONF_MAX_CONF_RSP 2
580
581 enum {
582 CONN_SREJ_SENT,
583 CONN_WAIT_F,
584 CONN_SREJ_ACT,
585 CONN_SEND_PBIT,
586 CONN_REMOTE_BUSY,
587 CONN_LOCAL_BUSY,
588 CONN_REJ_ACT,
589 CONN_SEND_FBIT,
590 CONN_RNR_SENT,
591 };
592
593 /* Definitions for flags in l2cap_chan */
594 enum {
595 FLAG_ROLE_SWITCH,
596 FLAG_FORCE_ACTIVE,
597 FLAG_FORCE_RELIABLE,
598 FLAG_FLUSHABLE,
599 FLAG_EXT_CTRL,
600 FLAG_EFS_ENABLE,
601 };
602
l2cap_chan_hold(struct l2cap_chan * c)603 static inline void l2cap_chan_hold(struct l2cap_chan *c)
604 {
605 atomic_inc(&c->refcnt);
606 }
607
l2cap_chan_put(struct l2cap_chan * c)608 static inline void l2cap_chan_put(struct l2cap_chan *c)
609 {
610 if (atomic_dec_and_test(&c->refcnt))
611 kfree(c);
612 }
613
l2cap_chan_lock(struct l2cap_chan * chan)614 static inline void l2cap_chan_lock(struct l2cap_chan *chan)
615 {
616 mutex_lock(&chan->lock);
617 }
618
l2cap_chan_unlock(struct l2cap_chan * chan)619 static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
620 {
621 mutex_unlock(&chan->lock);
622 }
623
l2cap_set_timer(struct l2cap_chan * chan,struct delayed_work * work,long timeout)624 static inline void l2cap_set_timer(struct l2cap_chan *chan,
625 struct delayed_work *work, long timeout)
626 {
627 BT_DBG("chan %p state %s timeout %ld", chan,
628 state_to_string(chan->state), timeout);
629
630 if (!cancel_delayed_work(work))
631 l2cap_chan_hold(chan);
632 schedule_delayed_work(work, timeout);
633 }
634
l2cap_clear_timer(struct l2cap_chan * chan,struct delayed_work * work)635 static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
636 struct delayed_work *work)
637 {
638 bool ret;
639
640 ret = cancel_delayed_work(work);
641 if (ret)
642 l2cap_chan_put(chan);
643
644 return ret;
645 }
646
647 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
648 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
649 #define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
650 msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO));
651 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
652 #define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
653 msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO));
654 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
655 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
656 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
657 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
658
__seq_offset(struct l2cap_chan * chan,__u16 seq1,__u16 seq2)659 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
660 {
661 int offset;
662
663 offset = (seq1 - seq2) % (chan->tx_win_max + 1);
664 if (offset < 0)
665 offset += (chan->tx_win_max + 1);
666
667 return offset;
668 }
669
__next_seq(struct l2cap_chan * chan,__u16 seq)670 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
671 {
672 return (seq + 1) % (chan->tx_win_max + 1);
673 }
674
l2cap_tx_window_full(struct l2cap_chan * ch)675 static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
676 {
677 int sub;
678
679 sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
680
681 if (sub < 0)
682 sub += 64;
683
684 return sub == ch->remote_tx_win;
685 }
686
__get_reqseq(struct l2cap_chan * chan,__u32 ctrl)687 static inline __u16 __get_reqseq(struct l2cap_chan *chan, __u32 ctrl)
688 {
689 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
690 return (ctrl & L2CAP_EXT_CTRL_REQSEQ) >>
691 L2CAP_EXT_CTRL_REQSEQ_SHIFT;
692 else
693 return (ctrl & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT;
694 }
695
__set_reqseq(struct l2cap_chan * chan,__u32 reqseq)696 static inline __u32 __set_reqseq(struct l2cap_chan *chan, __u32 reqseq)
697 {
698 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
699 return (reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT) &
700 L2CAP_EXT_CTRL_REQSEQ;
701 else
702 return (reqseq << L2CAP_CTRL_REQSEQ_SHIFT) & L2CAP_CTRL_REQSEQ;
703 }
704
__get_txseq(struct l2cap_chan * chan,__u32 ctrl)705 static inline __u16 __get_txseq(struct l2cap_chan *chan, __u32 ctrl)
706 {
707 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
708 return (ctrl & L2CAP_EXT_CTRL_TXSEQ) >>
709 L2CAP_EXT_CTRL_TXSEQ_SHIFT;
710 else
711 return (ctrl & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT;
712 }
713
__set_txseq(struct l2cap_chan * chan,__u32 txseq)714 static inline __u32 __set_txseq(struct l2cap_chan *chan, __u32 txseq)
715 {
716 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
717 return (txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT) &
718 L2CAP_EXT_CTRL_TXSEQ;
719 else
720 return (txseq << L2CAP_CTRL_TXSEQ_SHIFT) & L2CAP_CTRL_TXSEQ;
721 }
722
__is_sframe(struct l2cap_chan * chan,__u32 ctrl)723 static inline bool __is_sframe(struct l2cap_chan *chan, __u32 ctrl)
724 {
725 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
726 return ctrl & L2CAP_EXT_CTRL_FRAME_TYPE;
727 else
728 return ctrl & L2CAP_CTRL_FRAME_TYPE;
729 }
730
__set_sframe(struct l2cap_chan * chan)731 static inline __u32 __set_sframe(struct l2cap_chan *chan)
732 {
733 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
734 return L2CAP_EXT_CTRL_FRAME_TYPE;
735 else
736 return L2CAP_CTRL_FRAME_TYPE;
737 }
738
__get_ctrl_sar(struct l2cap_chan * chan,__u32 ctrl)739 static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl)
740 {
741 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
742 return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
743 else
744 return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
745 }
746
__set_ctrl_sar(struct l2cap_chan * chan,__u32 sar)747 static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar)
748 {
749 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
750 return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR;
751 else
752 return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR;
753 }
754
__is_sar_start(struct l2cap_chan * chan,__u32 ctrl)755 static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl)
756 {
757 return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START;
758 }
759
__get_sar_mask(struct l2cap_chan * chan)760 static inline __u32 __get_sar_mask(struct l2cap_chan *chan)
761 {
762 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
763 return L2CAP_EXT_CTRL_SAR;
764 else
765 return L2CAP_CTRL_SAR;
766 }
767
__get_ctrl_super(struct l2cap_chan * chan,__u32 ctrl)768 static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl)
769 {
770 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
771 return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >>
772 L2CAP_EXT_CTRL_SUPER_SHIFT;
773 else
774 return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;
775 }
776
__set_ctrl_super(struct l2cap_chan * chan,__u32 super)777 static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super)
778 {
779 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
780 return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) &
781 L2CAP_EXT_CTRL_SUPERVISE;
782 else
783 return (super << L2CAP_CTRL_SUPER_SHIFT) &
784 L2CAP_CTRL_SUPERVISE;
785 }
786
__set_ctrl_final(struct l2cap_chan * chan)787 static inline __u32 __set_ctrl_final(struct l2cap_chan *chan)
788 {
789 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
790 return L2CAP_EXT_CTRL_FINAL;
791 else
792 return L2CAP_CTRL_FINAL;
793 }
794
__is_ctrl_final(struct l2cap_chan * chan,__u32 ctrl)795 static inline bool __is_ctrl_final(struct l2cap_chan *chan, __u32 ctrl)
796 {
797 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
798 return ctrl & L2CAP_EXT_CTRL_FINAL;
799 else
800 return ctrl & L2CAP_CTRL_FINAL;
801 }
802
__set_ctrl_poll(struct l2cap_chan * chan)803 static inline __u32 __set_ctrl_poll(struct l2cap_chan *chan)
804 {
805 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
806 return L2CAP_EXT_CTRL_POLL;
807 else
808 return L2CAP_CTRL_POLL;
809 }
810
__is_ctrl_poll(struct l2cap_chan * chan,__u32 ctrl)811 static inline bool __is_ctrl_poll(struct l2cap_chan *chan, __u32 ctrl)
812 {
813 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
814 return ctrl & L2CAP_EXT_CTRL_POLL;
815 else
816 return ctrl & L2CAP_CTRL_POLL;
817 }
818
__get_control(struct l2cap_chan * chan,void * p)819 static inline __u32 __get_control(struct l2cap_chan *chan, void *p)
820 {
821 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
822 return get_unaligned_le32(p);
823 else
824 return get_unaligned_le16(p);
825 }
826
__put_control(struct l2cap_chan * chan,__u32 control,void * p)827 static inline void __put_control(struct l2cap_chan *chan, __u32 control,
828 void *p)
829 {
830 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
831 return put_unaligned_le32(control, p);
832 else
833 return put_unaligned_le16(control, p);
834 }
835
__ctrl_size(struct l2cap_chan * chan)836 static inline __u8 __ctrl_size(struct l2cap_chan *chan)
837 {
838 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
839 return L2CAP_EXT_HDR_SIZE - L2CAP_HDR_SIZE;
840 else
841 return L2CAP_ENH_HDR_SIZE - L2CAP_HDR_SIZE;
842 }
843
844 extern bool disable_ertm;
845
846 int l2cap_init_sockets(void);
847 void l2cap_cleanup_sockets(void);
848
849 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
850 int __l2cap_wait_ack(struct sock *sk);
851
852 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
853 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
854
855 struct l2cap_chan *l2cap_chan_create(struct sock *sk);
856 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
857 void l2cap_chan_destroy(struct l2cap_chan *chan);
858 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
859 bdaddr_t *dst);
860 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
861 u32 priority);
862 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
863 int l2cap_chan_check_security(struct l2cap_chan *chan);
864
865 #endif /* __L2CAP_H */
866