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Bluetooth: Remove sk parameter from l2cap_chan_create()
[deliverable/linux.git] / include / net / bluetooth / l2cap.h
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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 */
55struct 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
64struct 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
75struct 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_POLL_SHIFT 4
143#define L2CAP_CTRL_FINAL_SHIFT 7
144#define L2CAP_CTRL_REQSEQ_SHIFT 8
145#define L2CAP_CTRL_SAR_SHIFT 14
146
147/* L2CAP Extended Control Field bit mask */
148#define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
149#define L2CAP_EXT_CTRL_SAR 0x00030000
150#define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
151#define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
152
153#define L2CAP_EXT_CTRL_POLL 0x00040000
154#define L2CAP_EXT_CTRL_FINAL 0x00000002
155#define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
156
157#define L2CAP_EXT_CTRL_FINAL_SHIFT 1
158#define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
159#define L2CAP_EXT_CTRL_SAR_SHIFT 16
160#define L2CAP_EXT_CTRL_SUPER_SHIFT 16
161#define L2CAP_EXT_CTRL_POLL_SHIFT 18
162#define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
163
164/* L2CAP Supervisory Function */
165#define L2CAP_SUPER_RR 0x00
166#define L2CAP_SUPER_REJ 0x01
167#define L2CAP_SUPER_RNR 0x02
168#define L2CAP_SUPER_SREJ 0x03
169
170/* L2CAP Segmentation and Reassembly */
171#define L2CAP_SAR_UNSEGMENTED 0x00
172#define L2CAP_SAR_START 0x01
173#define L2CAP_SAR_END 0x02
174#define L2CAP_SAR_CONTINUE 0x03
175
176/* L2CAP Command rej. reasons */
177#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
178#define L2CAP_REJ_MTU_EXCEEDED 0x0001
179#define L2CAP_REJ_INVALID_CID 0x0002
180
181/* L2CAP structures */
182struct l2cap_hdr {
183 __le16 len;
184 __le16 cid;
185} __packed;
186#define L2CAP_HDR_SIZE 4
187#define L2CAP_ENH_HDR_SIZE 6
188#define L2CAP_EXT_HDR_SIZE 8
189
190#define L2CAP_FCS_SIZE 2
191#define L2CAP_SDULEN_SIZE 2
192#define L2CAP_PSMLEN_SIZE 2
193#define L2CAP_ENH_CTRL_SIZE 2
194#define L2CAP_EXT_CTRL_SIZE 4
195
196struct l2cap_cmd_hdr {
197 __u8 code;
198 __u8 ident;
199 __le16 len;
200} __packed;
201#define L2CAP_CMD_HDR_SIZE 4
202
203struct l2cap_cmd_rej_unk {
204 __le16 reason;
205} __packed;
206
207struct l2cap_cmd_rej_mtu {
208 __le16 reason;
209 __le16 max_mtu;
210} __packed;
211
212struct l2cap_cmd_rej_cid {
213 __le16 reason;
214 __le16 scid;
215 __le16 dcid;
216} __packed;
217
218struct l2cap_conn_req {
219 __le16 psm;
220 __le16 scid;
221} __packed;
222
223struct l2cap_conn_rsp {
224 __le16 dcid;
225 __le16 scid;
226 __le16 result;
227 __le16 status;
228} __packed;
229
230/* channel indentifier */
231#define L2CAP_CID_SIGNALING 0x0001
232#define L2CAP_CID_CONN_LESS 0x0002
233#define L2CAP_CID_LE_DATA 0x0004
234#define L2CAP_CID_LE_SIGNALING 0x0005
235#define L2CAP_CID_SMP 0x0006
236#define L2CAP_CID_DYN_START 0x0040
237#define L2CAP_CID_DYN_END 0xffff
238
239/* connect/create channel results */
240#define L2CAP_CR_SUCCESS 0x0000
241#define L2CAP_CR_PEND 0x0001
242#define L2CAP_CR_BAD_PSM 0x0002
243#define L2CAP_CR_SEC_BLOCK 0x0003
244#define L2CAP_CR_NO_MEM 0x0004
245#define L2CAP_CR_BAD_AMP 0x0005
246
247/* connect/create channel status */
248#define L2CAP_CS_NO_INFO 0x0000
249#define L2CAP_CS_AUTHEN_PEND 0x0001
250#define L2CAP_CS_AUTHOR_PEND 0x0002
251
252struct l2cap_conf_req {
253 __le16 dcid;
254 __le16 flags;
255 __u8 data[0];
256} __packed;
257
258struct l2cap_conf_rsp {
259 __le16 scid;
260 __le16 flags;
261 __le16 result;
262 __u8 data[0];
263} __packed;
264
265#define L2CAP_CONF_SUCCESS 0x0000
266#define L2CAP_CONF_UNACCEPT 0x0001
267#define L2CAP_CONF_REJECT 0x0002
268#define L2CAP_CONF_UNKNOWN 0x0003
269#define L2CAP_CONF_PENDING 0x0004
270#define L2CAP_CONF_EFS_REJECT 0x0005
271
272struct l2cap_conf_opt {
273 __u8 type;
274 __u8 len;
275 __u8 val[0];
276} __packed;
277#define L2CAP_CONF_OPT_SIZE 2
278
279#define L2CAP_CONF_HINT 0x80
280#define L2CAP_CONF_MASK 0x7f
281
282#define L2CAP_CONF_MTU 0x01
283#define L2CAP_CONF_FLUSH_TO 0x02
284#define L2CAP_CONF_QOS 0x03
285#define L2CAP_CONF_RFC 0x04
286#define L2CAP_CONF_FCS 0x05
287#define L2CAP_CONF_EFS 0x06
288#define L2CAP_CONF_EWS 0x07
289
290#define L2CAP_CONF_MAX_SIZE 22
291
292struct l2cap_conf_rfc {
293 __u8 mode;
294 __u8 txwin_size;
295 __u8 max_transmit;
296 __le16 retrans_timeout;
297 __le16 monitor_timeout;
298 __le16 max_pdu_size;
299} __packed;
300
301#define L2CAP_MODE_BASIC 0x00
302#define L2CAP_MODE_RETRANS 0x01
303#define L2CAP_MODE_FLOWCTL 0x02
304#define L2CAP_MODE_ERTM 0x03
305#define L2CAP_MODE_STREAMING 0x04
306
307struct l2cap_conf_efs {
308 __u8 id;
309 __u8 stype;
310 __le16 msdu;
311 __le32 sdu_itime;
312 __le32 acc_lat;
313 __le32 flush_to;
314} __packed;
315
316#define L2CAP_SERV_NOTRAFIC 0x00
317#define L2CAP_SERV_BESTEFFORT 0x01
318#define L2CAP_SERV_GUARANTEED 0x02
319
320#define L2CAP_BESTEFFORT_ID 0x01
321
322struct l2cap_disconn_req {
323 __le16 dcid;
324 __le16 scid;
325} __packed;
326
327struct l2cap_disconn_rsp {
328 __le16 dcid;
329 __le16 scid;
330} __packed;
331
332struct l2cap_info_req {
333 __le16 type;
334} __packed;
335
336struct l2cap_info_rsp {
337 __le16 type;
338 __le16 result;
339 __u8 data[0];
340} __packed;
341
342struct l2cap_create_chan_req {
343 __le16 psm;
344 __le16 scid;
345 __u8 amp_id;
346} __packed;
347
348struct l2cap_create_chan_rsp {
349 __le16 dcid;
350 __le16 scid;
351 __le16 result;
352 __le16 status;
353} __packed;
354
355struct l2cap_move_chan_req {
356 __le16 icid;
357 __u8 dest_amp_id;
358} __packed;
359
360struct l2cap_move_chan_rsp {
361 __le16 icid;
362 __le16 result;
363} __packed;
364
365#define L2CAP_MR_SUCCESS 0x0000
366#define L2CAP_MR_PEND 0x0001
367#define L2CAP_MR_BAD_ID 0x0002
368#define L2CAP_MR_SAME_ID 0x0003
369#define L2CAP_MR_NOT_SUPP 0x0004
370#define L2CAP_MR_COLLISION 0x0005
371#define L2CAP_MR_NOT_ALLOWED 0x0006
372
373struct l2cap_move_chan_cfm {
374 __le16 icid;
375 __le16 result;
376} __packed;
377
378#define L2CAP_MC_CONFIRMED 0x0000
379#define L2CAP_MC_UNCONFIRMED 0x0001
380
381struct l2cap_move_chan_cfm_rsp {
382 __le16 icid;
383} __packed;
384
385/* info type */
386#define L2CAP_IT_CL_MTU 0x0001
387#define L2CAP_IT_FEAT_MASK 0x0002
388#define L2CAP_IT_FIXED_CHAN 0x0003
389
390/* info result */
391#define L2CAP_IR_SUCCESS 0x0000
392#define L2CAP_IR_NOTSUPP 0x0001
393
394struct l2cap_conn_param_update_req {
395 __le16 min;
396 __le16 max;
397 __le16 latency;
398 __le16 to_multiplier;
399} __packed;
400
401struct l2cap_conn_param_update_rsp {
402 __le16 result;
403} __packed;
404
405/* Connection Parameters result */
406#define L2CAP_CONN_PARAM_ACCEPTED 0x0000
407#define L2CAP_CONN_PARAM_REJECTED 0x0001
408
409/* ----- L2CAP channels and connections ----- */
410struct srej_list {
411 __u16 tx_seq;
412 struct list_head list;
413};
414
415struct l2cap_chan {
416 struct sock *sk;
417
418 struct l2cap_conn *conn;
419
420 __u8 state;
421
422 atomic_t refcnt;
423
424 __le16 psm;
425 __u16 dcid;
426 __u16 scid;
427
428 __u16 imtu;
429 __u16 omtu;
430 __u16 flush_to;
431 __u8 mode;
432 __u8 chan_type;
433 __u8 chan_policy;
434
435 __le16 sport;
436
437 __u8 sec_level;
438
439 __u8 ident;
440
441 __u8 conf_req[64];
442 __u8 conf_len;
443 __u8 num_conf_req;
444 __u8 num_conf_rsp;
445
446 __u8 fcs;
447
448 __u16 tx_win;
449 __u16 tx_win_max;
450 __u8 max_tx;
451 __u16 retrans_timeout;
452 __u16 monitor_timeout;
453 __u16 mps;
454
455 __u8 tx_state;
456 __u8 rx_state;
457
458 unsigned long conf_state;
459 unsigned long conn_state;
460 unsigned long flags;
461
462 __u16 next_tx_seq;
463 __u16 expected_ack_seq;
464 __u16 expected_tx_seq;
465 __u16 buffer_seq;
466 __u16 buffer_seq_srej;
467 __u16 srej_save_reqseq;
468 __u16 last_acked_seq;
469 __u16 frames_sent;
470 __u16 unacked_frames;
471 __u8 retry_count;
472 __u16 srej_queue_next;
473 __u8 num_acked;
474 __u16 sdu_len;
475 struct sk_buff *sdu;
476 struct sk_buff *sdu_last_frag;
477
478 __u16 remote_tx_win;
479 __u8 remote_max_tx;
480 __u16 remote_mps;
481
482 __u8 local_id;
483 __u8 local_stype;
484 __u16 local_msdu;
485 __u32 local_sdu_itime;
486 __u32 local_acc_lat;
487 __u32 local_flush_to;
488
489 __u8 remote_id;
490 __u8 remote_stype;
491 __u16 remote_msdu;
492 __u32 remote_sdu_itime;
493 __u32 remote_acc_lat;
494 __u32 remote_flush_to;
495
496 struct delayed_work chan_timer;
497 struct delayed_work retrans_timer;
498 struct delayed_work monitor_timer;
499 struct delayed_work ack_timer;
500
501 struct sk_buff *tx_send_head;
502 struct sk_buff_head tx_q;
503 struct sk_buff_head srej_q;
504 struct list_head srej_l;
505
506 struct list_head list;
507 struct list_head global_l;
508
509 void *data;
510 struct l2cap_ops *ops;
511 struct mutex lock;
512};
513
514struct l2cap_ops {
515 char *name;
516
517 struct l2cap_chan *(*new_connection) (void *data);
518 int (*recv) (void *data, struct sk_buff *skb);
519 void (*close) (void *data);
520 void (*state_change) (void *data, int state);
521 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
522 unsigned long len, int nb, int *err);
523
524};
525
526struct l2cap_conn {
527 struct hci_conn *hcon;
528 struct hci_chan *hchan;
529
530 bdaddr_t *dst;
531 bdaddr_t *src;
532
533 unsigned int mtu;
534
535 __u32 feat_mask;
536 __u8 fixed_chan_mask;
537
538 __u8 info_state;
539 __u8 info_ident;
540
541 struct delayed_work info_timer;
542
543 spinlock_t lock;
544
545 struct sk_buff *rx_skb;
546 __u32 rx_len;
547 __u8 tx_ident;
548
549 __u8 disc_reason;
550
551 struct delayed_work security_timer;
552 struct smp_chan *smp_chan;
553
554 struct list_head chan_l;
555 struct mutex chan_lock;
556};
557
558#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
559#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
560#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
561
562#define L2CAP_CHAN_RAW 1
563#define L2CAP_CHAN_CONN_LESS 2
564#define L2CAP_CHAN_CONN_ORIENTED 3
565
566/* ----- L2CAP socket info ----- */
567#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
568
569struct l2cap_pinfo {
570 struct bt_sock bt;
571 struct l2cap_chan *chan;
572 struct sk_buff *rx_busy_skb;
573};
574
575enum {
576 CONF_REQ_SENT,
577 CONF_INPUT_DONE,
578 CONF_OUTPUT_DONE,
579 CONF_MTU_DONE,
580 CONF_MODE_DONE,
581 CONF_CONNECT_PEND,
582 CONF_NO_FCS_RECV,
583 CONF_STATE2_DEVICE,
584 CONF_EWS_RECV,
585 CONF_LOC_CONF_PEND,
586 CONF_REM_CONF_PEND,
587};
588
589#define L2CAP_CONF_MAX_CONF_REQ 2
590#define L2CAP_CONF_MAX_CONF_RSP 2
591
592enum {
593 CONN_SREJ_SENT,
594 CONN_WAIT_F,
595 CONN_SREJ_ACT,
596 CONN_SEND_PBIT,
597 CONN_REMOTE_BUSY,
598 CONN_LOCAL_BUSY,
599 CONN_REJ_ACT,
600 CONN_SEND_FBIT,
601 CONN_RNR_SENT,
602};
603
604/* Definitions for flags in l2cap_chan */
605enum {
606 FLAG_ROLE_SWITCH,
607 FLAG_FORCE_ACTIVE,
608 FLAG_FORCE_RELIABLE,
609 FLAG_FLUSHABLE,
610 FLAG_EXT_CTRL,
611 FLAG_EFS_ENABLE,
612};
613
614enum {
615 L2CAP_TX_STATE_XMIT,
616 L2CAP_TX_STATE_WAIT_F,
617};
618
619enum {
620 L2CAP_RX_STATE_RECV,
621 L2CAP_RX_STATE_SREJ_SENT,
622};
623
624enum {
625 L2CAP_TXSEQ_EXPECTED,
626 L2CAP_TXSEQ_EXPECTED_SREJ,
627 L2CAP_TXSEQ_UNEXPECTED,
628 L2CAP_TXSEQ_UNEXPECTED_SREJ,
629 L2CAP_TXSEQ_DUPLICATE,
630 L2CAP_TXSEQ_DUPLICATE_SREJ,
631 L2CAP_TXSEQ_INVALID,
632 L2CAP_TXSEQ_INVALID_IGNORE,
633};
634
635enum {
636 L2CAP_EV_DATA_REQUEST,
637 L2CAP_EV_LOCAL_BUSY_DETECTED,
638 L2CAP_EV_LOCAL_BUSY_CLEAR,
639 L2CAP_EV_RECV_REQSEQ_AND_FBIT,
640 L2CAP_EV_RECV_FBIT,
641 L2CAP_EV_RETRANS_TO,
642 L2CAP_EV_MONITOR_TO,
643 L2CAP_EV_EXPLICIT_POLL,
644 L2CAP_EV_RECV_IFRAME,
645 L2CAP_EV_RECV_RR,
646 L2CAP_EV_RECV_REJ,
647 L2CAP_EV_RECV_RNR,
648 L2CAP_EV_RECV_SREJ,
649 L2CAP_EV_RECV_FRAME,
650};
651
652static inline void l2cap_chan_hold(struct l2cap_chan *c)
653{
654 atomic_inc(&c->refcnt);
655}
656
657static inline void l2cap_chan_put(struct l2cap_chan *c)
658{
659 if (atomic_dec_and_test(&c->refcnt))
660 kfree(c);
661}
662
663static inline void l2cap_chan_lock(struct l2cap_chan *chan)
664{
665 mutex_lock(&chan->lock);
666}
667
668static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
669{
670 mutex_unlock(&chan->lock);
671}
672
673static inline void l2cap_set_timer(struct l2cap_chan *chan,
674 struct delayed_work *work, long timeout)
675{
676 BT_DBG("chan %p state %s timeout %ld", chan,
677 state_to_string(chan->state), timeout);
678
679 /* If delayed work cancelled do not hold(chan)
680 since it is already done with previous set_timer */
681 if (!cancel_delayed_work(work))
682 l2cap_chan_hold(chan);
683
684 schedule_delayed_work(work, timeout);
685}
686
687static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
688 struct delayed_work *work)
689{
690 bool ret;
691
692 /* put(chan) if delayed work cancelled otherwise it
693 is done in delayed work function */
694 ret = cancel_delayed_work(work);
695 if (ret)
696 l2cap_chan_put(chan);
697
698 return ret;
699}
700
701#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
702#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
703#define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
704 msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO));
705#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
706#define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
707 msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO));
708#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
709#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
710 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
711#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
712
713static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
714{
715 int offset;
716
717 offset = (seq1 - seq2) % (chan->tx_win_max + 1);
718 if (offset < 0)
719 offset += (chan->tx_win_max + 1);
720
721 return offset;
722}
723
724static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
725{
726 return (seq + 1) % (chan->tx_win_max + 1);
727}
728
729static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
730{
731 int sub;
732
733 sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
734
735 if (sub < 0)
736 sub += 64;
737
738 return sub == ch->remote_tx_win;
739}
740
741static inline __u16 __get_reqseq(struct l2cap_chan *chan, __u32 ctrl)
742{
743 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
744 return (ctrl & L2CAP_EXT_CTRL_REQSEQ) >>
745 L2CAP_EXT_CTRL_REQSEQ_SHIFT;
746 else
747 return (ctrl & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT;
748}
749
750static inline __u32 __set_reqseq(struct l2cap_chan *chan, __u32 reqseq)
751{
752 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
753 return (reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT) &
754 L2CAP_EXT_CTRL_REQSEQ;
755 else
756 return (reqseq << L2CAP_CTRL_REQSEQ_SHIFT) & L2CAP_CTRL_REQSEQ;
757}
758
759static inline __u16 __get_txseq(struct l2cap_chan *chan, __u32 ctrl)
760{
761 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
762 return (ctrl & L2CAP_EXT_CTRL_TXSEQ) >>
763 L2CAP_EXT_CTRL_TXSEQ_SHIFT;
764 else
765 return (ctrl & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT;
766}
767
768static inline __u32 __set_txseq(struct l2cap_chan *chan, __u32 txseq)
769{
770 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
771 return (txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT) &
772 L2CAP_EXT_CTRL_TXSEQ;
773 else
774 return (txseq << L2CAP_CTRL_TXSEQ_SHIFT) & L2CAP_CTRL_TXSEQ;
775}
776
777static inline bool __is_sframe(struct l2cap_chan *chan, __u32 ctrl)
778{
779 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
780 return ctrl & L2CAP_EXT_CTRL_FRAME_TYPE;
781 else
782 return ctrl & L2CAP_CTRL_FRAME_TYPE;
783}
784
785static inline __u32 __set_sframe(struct l2cap_chan *chan)
786{
787 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
788 return L2CAP_EXT_CTRL_FRAME_TYPE;
789 else
790 return L2CAP_CTRL_FRAME_TYPE;
791}
792
793static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl)
794{
795 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
796 return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
797 else
798 return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
799}
800
801static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar)
802{
803 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
804 return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR;
805 else
806 return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR;
807}
808
809static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl)
810{
811 return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START;
812}
813
814static inline __u32 __get_sar_mask(struct l2cap_chan *chan)
815{
816 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
817 return L2CAP_EXT_CTRL_SAR;
818 else
819 return L2CAP_CTRL_SAR;
820}
821
822static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl)
823{
824 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
825 return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >>
826 L2CAP_EXT_CTRL_SUPER_SHIFT;
827 else
828 return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;
829}
830
831static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super)
832{
833 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
834 return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) &
835 L2CAP_EXT_CTRL_SUPERVISE;
836 else
837 return (super << L2CAP_CTRL_SUPER_SHIFT) &
838 L2CAP_CTRL_SUPERVISE;
839}
840
841static inline __u32 __set_ctrl_final(struct l2cap_chan *chan)
842{
843 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
844 return L2CAP_EXT_CTRL_FINAL;
845 else
846 return L2CAP_CTRL_FINAL;
847}
848
849static inline bool __is_ctrl_final(struct l2cap_chan *chan, __u32 ctrl)
850{
851 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
852 return ctrl & L2CAP_EXT_CTRL_FINAL;
853 else
854 return ctrl & L2CAP_CTRL_FINAL;
855}
856
857static inline __u32 __set_ctrl_poll(struct l2cap_chan *chan)
858{
859 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
860 return L2CAP_EXT_CTRL_POLL;
861 else
862 return L2CAP_CTRL_POLL;
863}
864
865static inline bool __is_ctrl_poll(struct l2cap_chan *chan, __u32 ctrl)
866{
867 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
868 return ctrl & L2CAP_EXT_CTRL_POLL;
869 else
870 return ctrl & L2CAP_CTRL_POLL;
871}
872
873static inline __u32 __get_control(struct l2cap_chan *chan, void *p)
874{
875 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
876 return get_unaligned_le32(p);
877 else
878 return get_unaligned_le16(p);
879}
880
881static inline void __put_control(struct l2cap_chan *chan, __u32 control,
882 void *p)
883{
884 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
885 return put_unaligned_le32(control, p);
886 else
887 return put_unaligned_le16(control, p);
888}
889
890static inline __u8 __ctrl_size(struct l2cap_chan *chan)
891{
892 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
893 return L2CAP_EXT_HDR_SIZE - L2CAP_HDR_SIZE;
894 else
895 return L2CAP_ENH_HDR_SIZE - L2CAP_HDR_SIZE;
896}
897
898extern bool disable_ertm;
899
900int l2cap_init_sockets(void);
901void l2cap_cleanup_sockets(void);
902
903void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
904int __l2cap_wait_ack(struct sock *sk);
905
906int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
907int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
908
909struct l2cap_chan *l2cap_chan_create(void);
910void l2cap_chan_close(struct l2cap_chan *chan, int reason);
911void l2cap_chan_destroy(struct l2cap_chan *chan);
912int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
913 bdaddr_t *dst);
914int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
915 u32 priority);
916void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
917int l2cap_chan_check_security(struct l2cap_chan *chan);
918
919#endif /* __L2CAP_H */
Linux kernel - Deliverables
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