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27#ifndef __L2CAP_H
28#define __L2CAP_H
29
30#include <asm/unaligned.h>
31
32
33#define L2CAP_DEFAULT_MTU 672
34#define L2CAP_DEFAULT_MIN_MTU 48
35#define L2CAP_DEFAULT_FLUSH_TO 0xFFFF
36#define L2CAP_EFS_DEFAULT_FLUSH_TO 0xFFFFFFFF
37#define L2CAP_DEFAULT_TX_WINDOW 63
38#define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF
39#define L2CAP_DEFAULT_MAX_TX 3
40#define L2CAP_DEFAULT_RETRANS_TO 2000
41#define L2CAP_DEFAULT_MONITOR_TO 12000
42#define L2CAP_DEFAULT_MAX_PDU_SIZE 1492
43#define L2CAP_DEFAULT_ACK_TO 200
44#define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF
45#define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF
46#define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF
47#define L2CAP_BREDR_MAX_PAYLOAD 1019
48#define L2CAP_LE_MIN_MTU 23
49
50#define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100)
51#define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000)
52#define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000)
53#define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000)
54#define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000)
55#define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000)
56#define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000)
57
58#define L2CAP_A2MP_DEFAULT_MTU 670
59
60
61struct sockaddr_l2 {
62 sa_family_t l2_family;
63 __le16 l2_psm;
64 bdaddr_t l2_bdaddr;
65 __le16 l2_cid;
66 __u8 l2_bdaddr_type;
67};
68
69
70#define L2CAP_OPTIONS 0x01
71struct l2cap_options {
72 __u16 omtu;
73 __u16 imtu;
74 __u16 flush_to;
75 __u8 mode;
76 __u8 fcs;
77 __u8 max_tx;
78 __u16 txwin_size;
79};
80
81#define L2CAP_CONNINFO 0x02
82struct l2cap_conninfo {
83 __u16 hci_handle;
84 __u8 dev_class[3];
85};
86
87#define L2CAP_LM 0x03
88#define L2CAP_LM_MASTER 0x0001
89#define L2CAP_LM_AUTH 0x0002
90#define L2CAP_LM_ENCRYPT 0x0004
91#define L2CAP_LM_TRUSTED 0x0008
92#define L2CAP_LM_RELIABLE 0x0010
93#define L2CAP_LM_SECURE 0x0020
94#define L2CAP_LM_FIPS 0x0040
95
96
97#define L2CAP_COMMAND_REJ 0x01
98#define L2CAP_CONN_REQ 0x02
99#define L2CAP_CONN_RSP 0x03
100#define L2CAP_CONF_REQ 0x04
101#define L2CAP_CONF_RSP 0x05
102#define L2CAP_DISCONN_REQ 0x06
103#define L2CAP_DISCONN_RSP 0x07
104#define L2CAP_ECHO_REQ 0x08
105#define L2CAP_ECHO_RSP 0x09
106#define L2CAP_INFO_REQ 0x0a
107#define L2CAP_INFO_RSP 0x0b
108#define L2CAP_CREATE_CHAN_REQ 0x0c
109#define L2CAP_CREATE_CHAN_RSP 0x0d
110#define L2CAP_MOVE_CHAN_REQ 0x0e
111#define L2CAP_MOVE_CHAN_RSP 0x0f
112#define L2CAP_MOVE_CHAN_CFM 0x10
113#define L2CAP_MOVE_CHAN_CFM_RSP 0x11
114#define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
115#define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
116#define L2CAP_LE_CONN_REQ 0x14
117#define L2CAP_LE_CONN_RSP 0x15
118#define L2CAP_LE_CREDITS 0x16
119
120
121#define L2CAP_FEAT_FLOWCTL 0x00000001
122#define L2CAP_FEAT_RETRANS 0x00000002
123#define L2CAP_FEAT_BIDIR_QOS 0x00000004
124#define L2CAP_FEAT_ERTM 0x00000008
125#define L2CAP_FEAT_STREAMING 0x00000010
126#define L2CAP_FEAT_FCS 0x00000020
127#define L2CAP_FEAT_EXT_FLOW 0x00000040
128#define L2CAP_FEAT_FIXED_CHAN 0x00000080
129#define L2CAP_FEAT_EXT_WINDOW 0x00000100
130#define L2CAP_FEAT_UCD 0x00000200
131
132
133#define L2CAP_FCS_NONE 0x00
134#define L2CAP_FCS_CRC16 0x01
135
136
137#define L2CAP_FC_L2CAP 0x02
138#define L2CAP_FC_CONNLESS 0x04
139#define L2CAP_FC_A2MP 0x08
140#define L2CAP_FC_6LOWPAN 0x3e
141
142
143#define L2CAP_CTRL_SAR 0xC000
144#define L2CAP_CTRL_REQSEQ 0x3F00
145#define L2CAP_CTRL_TXSEQ 0x007E
146#define L2CAP_CTRL_SUPERVISE 0x000C
147
148#define L2CAP_CTRL_RETRANS 0x0080
149#define L2CAP_CTRL_FINAL 0x0080
150#define L2CAP_CTRL_POLL 0x0010
151#define L2CAP_CTRL_FRAME_TYPE 0x0001
152
153#define L2CAP_CTRL_TXSEQ_SHIFT 1
154#define L2CAP_CTRL_SUPER_SHIFT 2
155#define L2CAP_CTRL_POLL_SHIFT 4
156#define L2CAP_CTRL_FINAL_SHIFT 7
157#define L2CAP_CTRL_REQSEQ_SHIFT 8
158#define L2CAP_CTRL_SAR_SHIFT 14
159
160
161#define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
162#define L2CAP_EXT_CTRL_SAR 0x00030000
163#define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
164#define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
165
166#define L2CAP_EXT_CTRL_POLL 0x00040000
167#define L2CAP_EXT_CTRL_FINAL 0x00000002
168#define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001
169
170#define L2CAP_EXT_CTRL_FINAL_SHIFT 1
171#define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
172#define L2CAP_EXT_CTRL_SAR_SHIFT 16
173#define L2CAP_EXT_CTRL_SUPER_SHIFT 16
174#define L2CAP_EXT_CTRL_POLL_SHIFT 18
175#define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
176
177
178#define L2CAP_SUPER_RR 0x00
179#define L2CAP_SUPER_REJ 0x01
180#define L2CAP_SUPER_RNR 0x02
181#define L2CAP_SUPER_SREJ 0x03
182
183
184#define L2CAP_SAR_UNSEGMENTED 0x00
185#define L2CAP_SAR_START 0x01
186#define L2CAP_SAR_END 0x02
187#define L2CAP_SAR_CONTINUE 0x03
188
189
190#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
191#define L2CAP_REJ_MTU_EXCEEDED 0x0001
192#define L2CAP_REJ_INVALID_CID 0x0002
193
194
195struct l2cap_hdr {
196 __le16 len;
197 __le16 cid;
198} __packed;
199#define L2CAP_HDR_SIZE 4
200#define L2CAP_ENH_HDR_SIZE 6
201#define L2CAP_EXT_HDR_SIZE 8
202
203#define L2CAP_FCS_SIZE 2
204#define L2CAP_SDULEN_SIZE 2
205#define L2CAP_PSMLEN_SIZE 2
206#define L2CAP_ENH_CTRL_SIZE 2
207#define L2CAP_EXT_CTRL_SIZE 4
208
209struct l2cap_cmd_hdr {
210 __u8 code;
211 __u8 ident;
212 __le16 len;
213} __packed;
214#define L2CAP_CMD_HDR_SIZE 4
215
216struct l2cap_cmd_rej_unk {
217 __le16 reason;
218} __packed;
219
220struct l2cap_cmd_rej_mtu {
221 __le16 reason;
222 __le16 max_mtu;
223} __packed;
224
225struct l2cap_cmd_rej_cid {
226 __le16 reason;
227 __le16 scid;
228 __le16 dcid;
229} __packed;
230
231struct l2cap_conn_req {
232 __le16 psm;
233 __le16 scid;
234} __packed;
235
236struct l2cap_conn_rsp {
237 __le16 dcid;
238 __le16 scid;
239 __le16 result;
240 __le16 status;
241} __packed;
242
243
244#define L2CAP_PSM_SDP 0x0001
245#define L2CAP_PSM_RFCOMM 0x0003
246#define L2CAP_PSM_3DSP 0x0021
247
248
249#define L2CAP_CID_SIGNALING 0x0001
250#define L2CAP_CID_CONN_LESS 0x0002
251#define L2CAP_CID_A2MP 0x0003
252#define L2CAP_CID_ATT 0x0004
253#define L2CAP_CID_LE_SIGNALING 0x0005
254#define L2CAP_CID_SMP 0x0006
255#define L2CAP_CID_DYN_START 0x0040
256#define L2CAP_CID_DYN_END 0xffff
257#define L2CAP_CID_LE_DYN_END 0x007f
258
259
260#define L2CAP_CR_SUCCESS 0x0000
261#define L2CAP_CR_PEND 0x0001
262#define L2CAP_CR_BAD_PSM 0x0002
263#define L2CAP_CR_SEC_BLOCK 0x0003
264#define L2CAP_CR_NO_MEM 0x0004
265#define L2CAP_CR_BAD_AMP 0x0005
266#define L2CAP_CR_AUTHENTICATION 0x0005
267#define L2CAP_CR_AUTHORIZATION 0x0006
268#define L2CAP_CR_BAD_KEY_SIZE 0x0007
269#define L2CAP_CR_ENCRYPTION 0x0008
270
271
272#define L2CAP_CS_NO_INFO 0x0000
273#define L2CAP_CS_AUTHEN_PEND 0x0001
274#define L2CAP_CS_AUTHOR_PEND 0x0002
275
276struct l2cap_conf_req {
277 __le16 dcid;
278 __le16 flags;
279 __u8 data[0];
280} __packed;
281
282struct l2cap_conf_rsp {
283 __le16 scid;
284 __le16 flags;
285 __le16 result;
286 __u8 data[0];
287} __packed;
288
289#define L2CAP_CONF_SUCCESS 0x0000
290#define L2CAP_CONF_UNACCEPT 0x0001
291#define L2CAP_CONF_REJECT 0x0002
292#define L2CAP_CONF_UNKNOWN 0x0003
293#define L2CAP_CONF_PENDING 0x0004
294#define L2CAP_CONF_EFS_REJECT 0x0005
295
296
297#define L2CAP_CONF_FLAG_CONTINUATION 0x0001
298
299struct l2cap_conf_opt {
300 __u8 type;
301 __u8 len;
302 __u8 val[0];
303} __packed;
304#define L2CAP_CONF_OPT_SIZE 2
305
306#define L2CAP_CONF_HINT 0x80
307#define L2CAP_CONF_MASK 0x7f
308
309#define L2CAP_CONF_MTU 0x01
310#define L2CAP_CONF_FLUSH_TO 0x02
311#define L2CAP_CONF_QOS 0x03
312#define L2CAP_CONF_RFC 0x04
313#define L2CAP_CONF_FCS 0x05
314#define L2CAP_CONF_EFS 0x06
315#define L2CAP_CONF_EWS 0x07
316
317#define L2CAP_CONF_MAX_SIZE 22
318
319struct l2cap_conf_rfc {
320 __u8 mode;
321 __u8 txwin_size;
322 __u8 max_transmit;
323 __le16 retrans_timeout;
324 __le16 monitor_timeout;
325 __le16 max_pdu_size;
326} __packed;
327
328#define L2CAP_MODE_BASIC 0x00
329#define L2CAP_MODE_RETRANS 0x01
330#define L2CAP_MODE_FLOWCTL 0x02
331#define L2CAP_MODE_ERTM 0x03
332#define L2CAP_MODE_STREAMING 0x04
333
334
335
336
337
338#define L2CAP_MODE_LE_FLOWCTL 0x80
339
340struct l2cap_conf_efs {
341 __u8 id;
342 __u8 stype;
343 __le16 msdu;
344 __le32 sdu_itime;
345 __le32 acc_lat;
346 __le32 flush_to;
347} __packed;
348
349#define L2CAP_SERV_NOTRAFIC 0x00
350#define L2CAP_SERV_BESTEFFORT 0x01
351#define L2CAP_SERV_GUARANTEED 0x02
352
353#define L2CAP_BESTEFFORT_ID 0x01
354
355struct l2cap_disconn_req {
356 __le16 dcid;
357 __le16 scid;
358} __packed;
359
360struct l2cap_disconn_rsp {
361 __le16 dcid;
362 __le16 scid;
363} __packed;
364
365struct l2cap_info_req {
366 __le16 type;
367} __packed;
368
369struct l2cap_info_rsp {
370 __le16 type;
371 __le16 result;
372 __u8 data[0];
373} __packed;
374
375struct l2cap_create_chan_req {
376 __le16 psm;
377 __le16 scid;
378 __u8 amp_id;
379} __packed;
380
381struct l2cap_create_chan_rsp {
382 __le16 dcid;
383 __le16 scid;
384 __le16 result;
385 __le16 status;
386} __packed;
387
388struct l2cap_move_chan_req {
389 __le16 icid;
390 __u8 dest_amp_id;
391} __packed;
392
393struct l2cap_move_chan_rsp {
394 __le16 icid;
395 __le16 result;
396} __packed;
397
398#define L2CAP_MR_SUCCESS 0x0000
399#define L2CAP_MR_PEND 0x0001
400#define L2CAP_MR_BAD_ID 0x0002
401#define L2CAP_MR_SAME_ID 0x0003
402#define L2CAP_MR_NOT_SUPP 0x0004
403#define L2CAP_MR_COLLISION 0x0005
404#define L2CAP_MR_NOT_ALLOWED 0x0006
405
406struct l2cap_move_chan_cfm {
407 __le16 icid;
408 __le16 result;
409} __packed;
410
411#define L2CAP_MC_CONFIRMED 0x0000
412#define L2CAP_MC_UNCONFIRMED 0x0001
413
414struct l2cap_move_chan_cfm_rsp {
415 __le16 icid;
416} __packed;
417
418
419#define L2CAP_IT_CL_MTU 0x0001
420#define L2CAP_IT_FEAT_MASK 0x0002
421#define L2CAP_IT_FIXED_CHAN 0x0003
422
423
424#define L2CAP_IR_SUCCESS 0x0000
425#define L2CAP_IR_NOTSUPP 0x0001
426
427struct l2cap_conn_param_update_req {
428 __le16 min;
429 __le16 max;
430 __le16 latency;
431 __le16 to_multiplier;
432} __packed;
433
434struct l2cap_conn_param_update_rsp {
435 __le16 result;
436} __packed;
437
438
439#define L2CAP_CONN_PARAM_ACCEPTED 0x0000
440#define L2CAP_CONN_PARAM_REJECTED 0x0001
441
442#define L2CAP_LE_MAX_CREDITS 10
443#define L2CAP_LE_DEFAULT_MPS 230
444
445struct l2cap_le_conn_req {
446 __le16 psm;
447 __le16 scid;
448 __le16 mtu;
449 __le16 mps;
450 __le16 credits;
451} __packed;
452
453struct l2cap_le_conn_rsp {
454 __le16 dcid;
455 __le16 mtu;
456 __le16 mps;
457 __le16 credits;
458 __le16 result;
459} __packed;
460
461struct l2cap_le_credits {
462 __le16 cid;
463 __le16 credits;
464} __packed;
465
466
467struct l2cap_seq_list {
468 __u16 head;
469 __u16 tail;
470 __u16 mask;
471 __u16 *list;
472};
473
474#define L2CAP_SEQ_LIST_CLEAR 0xFFFF
475#define L2CAP_SEQ_LIST_TAIL 0x8000
476
477struct l2cap_chan {
478 struct l2cap_conn *conn;
479 struct hci_conn *hs_hcon;
480 struct hci_chan *hs_hchan;
481 struct kref kref;
482
483 __u8 state;
484
485 bdaddr_t dst;
486 __u8 dst_type;
487 bdaddr_t src;
488 __u8 src_type;
489 __le16 psm;
490 __le16 sport;
491 __u16 dcid;
492 __u16 scid;
493
494 __u16 imtu;
495 __u16 omtu;
496 __u16 flush_to;
497 __u8 mode;
498 __u8 chan_type;
499 __u8 chan_policy;
500
501 __u8 sec_level;
502
503 __u8 ident;
504
505 __u8 conf_req[64];
506 __u8 conf_len;
507 __u8 num_conf_req;
508 __u8 num_conf_rsp;
509
510 __u8 fcs;
511
512 __u16 tx_win;
513 __u16 tx_win_max;
514 __u16 ack_win;
515 __u8 max_tx;
516 __u16 retrans_timeout;
517 __u16 monitor_timeout;
518 __u16 mps;
519
520 __u16 tx_credits;
521 __u16 rx_credits;
522
523 __u8 tx_state;
524 __u8 rx_state;
525
526 unsigned long conf_state;
527 unsigned long conn_state;
528 unsigned long flags;
529
530 __u8 remote_amp_id;
531 __u8 local_amp_id;
532 __u8 move_id;
533 __u8 move_state;
534 __u8 move_role;
535
536 __u16 next_tx_seq;
537 __u16 expected_ack_seq;
538 __u16 expected_tx_seq;
539 __u16 buffer_seq;
540 __u16 srej_save_reqseq;
541 __u16 last_acked_seq;
542 __u16 frames_sent;
543 __u16 unacked_frames;
544 __u8 retry_count;
545 __u16 sdu_len;
546 struct sk_buff *sdu;
547 struct sk_buff *sdu_last_frag;
548
549 __u16 remote_tx_win;
550 __u8 remote_max_tx;
551 __u16 remote_mps;
552
553 __u8 local_id;
554 __u8 local_stype;
555 __u16 local_msdu;
556 __u32 local_sdu_itime;
557 __u32 local_acc_lat;
558 __u32 local_flush_to;
559
560 __u8 remote_id;
561 __u8 remote_stype;
562 __u16 remote_msdu;
563 __u32 remote_sdu_itime;
564 __u32 remote_acc_lat;
565 __u32 remote_flush_to;
566
567 struct delayed_work chan_timer;
568 struct delayed_work retrans_timer;
569 struct delayed_work monitor_timer;
570 struct delayed_work ack_timer;
571
572 struct sk_buff *tx_send_head;
573 struct sk_buff_head tx_q;
574 struct sk_buff_head srej_q;
575 struct l2cap_seq_list srej_list;
576 struct l2cap_seq_list retrans_list;
577
578 struct list_head list;
579 struct list_head global_l;
580
581 void *data;
582 struct l2cap_ops *ops;
583 struct mutex lock;
584};
585
586struct l2cap_ops {
587 char *name;
588
589 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan);
590 int (*recv) (struct l2cap_chan * chan,
591 struct sk_buff *skb);
592 void (*teardown) (struct l2cap_chan *chan, int err);
593 void (*close) (struct l2cap_chan *chan);
594 void (*state_change) (struct l2cap_chan *chan,
595 int state, int err);
596 void (*ready) (struct l2cap_chan *chan);
597 void (*defer) (struct l2cap_chan *chan);
598 void (*resume) (struct l2cap_chan *chan);
599 void (*suspend) (struct l2cap_chan *chan);
600 void (*set_shutdown) (struct l2cap_chan *chan);
601 long (*get_sndtimeo) (struct l2cap_chan *chan);
602 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
603 unsigned long len, int nb);
604};
605
606struct l2cap_conn {
607 struct hci_conn *hcon;
608 struct hci_chan *hchan;
609
610 unsigned int mtu;
611
612 __u32 feat_mask;
613 __u8 fixed_chan_mask;
614 bool hs_enabled;
615
616 __u8 info_state;
617 __u8 info_ident;
618
619 struct delayed_work info_timer;
620
621 spinlock_t lock;
622
623 struct sk_buff *rx_skb;
624 __u32 rx_len;
625 __u8 tx_ident;
626
627 struct sk_buff_head pending_rx;
628 struct work_struct pending_rx_work;
629
630 __u8 disc_reason;
631
632 struct delayed_work security_timer;
633 struct smp_chan *smp_chan;
634
635 struct list_head chan_l;
636 struct mutex chan_lock;
637 struct kref ref;
638 struct list_head users;
639};
640
641struct l2cap_user {
642 struct list_head list;
643 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user);
644 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user);
645};
646
647#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
648#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
649#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
650
651#define L2CAP_CHAN_RAW 1
652#define L2CAP_CHAN_CONN_LESS 2
653#define L2CAP_CHAN_CONN_ORIENTED 3
654#define L2CAP_CHAN_FIXED 4
655
656
657#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
658
659struct l2cap_pinfo {
660 struct bt_sock bt;
661 struct l2cap_chan *chan;
662 struct sk_buff *rx_busy_skb;
663};
664
665enum {
666 CONF_REQ_SENT,
667 CONF_INPUT_DONE,
668 CONF_OUTPUT_DONE,
669 CONF_MTU_DONE,
670 CONF_MODE_DONE,
671 CONF_CONNECT_PEND,
672 CONF_RECV_NO_FCS,
673 CONF_STATE2_DEVICE,
674 CONF_EWS_RECV,
675 CONF_LOC_CONF_PEND,
676 CONF_REM_CONF_PEND,
677 CONF_NOT_COMPLETE,
678};
679
680#define L2CAP_CONF_MAX_CONF_REQ 2
681#define L2CAP_CONF_MAX_CONF_RSP 2
682
683enum {
684 CONN_SREJ_SENT,
685 CONN_WAIT_F,
686 CONN_SREJ_ACT,
687 CONN_SEND_PBIT,
688 CONN_REMOTE_BUSY,
689 CONN_LOCAL_BUSY,
690 CONN_REJ_ACT,
691 CONN_SEND_FBIT,
692 CONN_RNR_SENT,
693};
694
695
696enum {
697 FLAG_ROLE_SWITCH,
698 FLAG_FORCE_ACTIVE,
699 FLAG_FORCE_RELIABLE,
700 FLAG_FLUSHABLE,
701 FLAG_EXT_CTRL,
702 FLAG_EFS_ENABLE,
703 FLAG_DEFER_SETUP,
704 FLAG_LE_CONN_REQ_SENT,
705};
706
707enum {
708 L2CAP_TX_STATE_XMIT,
709 L2CAP_TX_STATE_WAIT_F,
710};
711
712enum {
713 L2CAP_RX_STATE_RECV,
714 L2CAP_RX_STATE_SREJ_SENT,
715 L2CAP_RX_STATE_MOVE,
716 L2CAP_RX_STATE_WAIT_P,
717 L2CAP_RX_STATE_WAIT_F,
718};
719
720enum {
721 L2CAP_TXSEQ_EXPECTED,
722 L2CAP_TXSEQ_EXPECTED_SREJ,
723 L2CAP_TXSEQ_UNEXPECTED,
724 L2CAP_TXSEQ_UNEXPECTED_SREJ,
725 L2CAP_TXSEQ_DUPLICATE,
726 L2CAP_TXSEQ_DUPLICATE_SREJ,
727 L2CAP_TXSEQ_INVALID,
728 L2CAP_TXSEQ_INVALID_IGNORE,
729};
730
731enum {
732 L2CAP_EV_DATA_REQUEST,
733 L2CAP_EV_LOCAL_BUSY_DETECTED,
734 L2CAP_EV_LOCAL_BUSY_CLEAR,
735 L2CAP_EV_RECV_REQSEQ_AND_FBIT,
736 L2CAP_EV_RECV_FBIT,
737 L2CAP_EV_RETRANS_TO,
738 L2CAP_EV_MONITOR_TO,
739 L2CAP_EV_EXPLICIT_POLL,
740 L2CAP_EV_RECV_IFRAME,
741 L2CAP_EV_RECV_RR,
742 L2CAP_EV_RECV_REJ,
743 L2CAP_EV_RECV_RNR,
744 L2CAP_EV_RECV_SREJ,
745 L2CAP_EV_RECV_FRAME,
746};
747
748enum {
749 L2CAP_MOVE_ROLE_NONE,
750 L2CAP_MOVE_ROLE_INITIATOR,
751 L2CAP_MOVE_ROLE_RESPONDER,
752};
753
754enum {
755 L2CAP_MOVE_STABLE,
756 L2CAP_MOVE_WAIT_REQ,
757 L2CAP_MOVE_WAIT_RSP,
758 L2CAP_MOVE_WAIT_RSP_SUCCESS,
759 L2CAP_MOVE_WAIT_CONFIRM,
760 L2CAP_MOVE_WAIT_CONFIRM_RSP,
761 L2CAP_MOVE_WAIT_LOGICAL_COMP,
762 L2CAP_MOVE_WAIT_LOGICAL_CFM,
763 L2CAP_MOVE_WAIT_LOCAL_BUSY,
764 L2CAP_MOVE_WAIT_PREPARE,
765};
766
767void l2cap_chan_hold(struct l2cap_chan *c);
768void l2cap_chan_put(struct l2cap_chan *c);
769
770static inline void l2cap_chan_lock(struct l2cap_chan *chan)
771{
772 mutex_lock(&chan->lock);
773}
774
775static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
776{
777 mutex_unlock(&chan->lock);
778}
779
780static inline void l2cap_set_timer(struct l2cap_chan *chan,
781 struct delayed_work *work, long timeout)
782{
783 BT_DBG("chan %p state %s timeout %ld", chan,
784 state_to_string(chan->state), timeout);
785
786
787
788 if (!cancel_delayed_work(work))
789 l2cap_chan_hold(chan);
790
791 schedule_delayed_work(work, timeout);
792}
793
794static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
795 struct delayed_work *work)
796{
797 bool ret;
798
799
800
801 ret = cancel_delayed_work(work);
802 if (ret)
803 l2cap_chan_put(chan);
804
805 return ret;
806}
807
808#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
809#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
810#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
811#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
812#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
813 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
814#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
815
816static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
817{
818 if (seq1 >= seq2)
819 return seq1 - seq2;
820 else
821 return chan->tx_win_max + 1 - seq2 + seq1;
822}
823
824static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
825{
826 return (seq + 1) % (chan->tx_win_max + 1);
827}
828
829static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
830{
831 return NULL;
832}
833
834static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
835{
836}
837
838static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
839{
840}
841
842static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
843{
844}
845
846static inline void l2cap_chan_no_resume(struct l2cap_chan *chan)
847{
848}
849
850static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan)
851{
852}
853
854static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
855{
856 return 0;
857}
858
859extern bool disable_ertm;
860
861int l2cap_init_sockets(void);
862void l2cap_cleanup_sockets(void);
863bool l2cap_is_socket(struct socket *sock);
864
865void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan);
866void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
867
868int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
869int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
870
871struct l2cap_chan *l2cap_chan_create(void);
872void l2cap_chan_close(struct l2cap_chan *chan, int reason);
873int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
874 bdaddr_t *dst, u8 dst_type);
875int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
876 u32 priority);
877void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
878int l2cap_chan_check_security(struct l2cap_chan *chan);
879void l2cap_chan_set_defaults(struct l2cap_chan *chan);
880int l2cap_ertm_init(struct l2cap_chan *chan);
881void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
882void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
883void l2cap_chan_del(struct l2cap_chan *chan, int err);
884void l2cap_conn_update_id_addr(struct hci_conn *hcon);
885void l2cap_send_conn_req(struct l2cap_chan *chan);
886void l2cap_move_start(struct l2cap_chan *chan);
887void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
888 u8 status);
889void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
890
891void l2cap_conn_get(struct l2cap_conn *conn);
892void l2cap_conn_put(struct l2cap_conn *conn);
893
894int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user);
895void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user);
896
897#endif
898
