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27#ifndef __L2CAP_H
28#define __L2CAP_H
29
30#include <asm/unaligned.h>
31#include <linux/atomic.h>
32
33
34#define L2CAP_DEFAULT_MTU 672
35#define L2CAP_DEFAULT_MIN_MTU 48
36#define L2CAP_DEFAULT_FLUSH_TO 0xFFFF
37#define L2CAP_EFS_DEFAULT_FLUSH_TO 0xFFFFFFFF
38#define L2CAP_DEFAULT_TX_WINDOW 63
39#define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF
40#define L2CAP_DEFAULT_MAX_TX 3
41#define L2CAP_DEFAULT_RETRANS_TO 2000
42#define L2CAP_DEFAULT_MONITOR_TO 12000
43#define L2CAP_DEFAULT_MAX_PDU_SIZE 1492
44#define L2CAP_DEFAULT_ACK_TO 200
45#define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF
46#define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF
47#define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF
48#define L2CAP_BREDR_MAX_PAYLOAD 1019
49#define L2CAP_LE_MIN_MTU 23
50#define L2CAP_ECRED_CONN_SCID_MAX 5
51
52#define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100)
53#define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000)
54#define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000)
55#define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000)
56#define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000)
57#define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000)
58#define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000)
59#define L2CAP_WAIT_ACK_POLL_PERIOD msecs_to_jiffies(200)
60#define L2CAP_WAIT_ACK_TIMEOUT msecs_to_jiffies(10000)
61
62#define L2CAP_A2MP_DEFAULT_MTU 670
63
64
65struct sockaddr_l2 {
66 sa_family_t l2_family;
67 __le16 l2_psm;
68 bdaddr_t l2_bdaddr;
69 __le16 l2_cid;
70 __u8 l2_bdaddr_type;
71};
72
73
74#define L2CAP_OPTIONS 0x01
75struct l2cap_options {
76 __u16 omtu;
77 __u16 imtu;
78 __u16 flush_to;
79 __u8 mode;
80 __u8 fcs;
81 __u8 max_tx;
82 __u16 txwin_size;
83};
84
85#define L2CAP_CONNINFO 0x02
86struct l2cap_conninfo {
87 __u16 hci_handle;
88 __u8 dev_class[3];
89};
90
91#define L2CAP_LM 0x03
92#define L2CAP_LM_MASTER 0x0001
93#define L2CAP_LM_AUTH 0x0002
94#define L2CAP_LM_ENCRYPT 0x0004
95#define L2CAP_LM_TRUSTED 0x0008
96#define L2CAP_LM_RELIABLE 0x0010
97#define L2CAP_LM_SECURE 0x0020
98#define L2CAP_LM_FIPS 0x0040
99
100
101#define L2CAP_COMMAND_REJ 0x01
102#define L2CAP_CONN_REQ 0x02
103#define L2CAP_CONN_RSP 0x03
104#define L2CAP_CONF_REQ 0x04
105#define L2CAP_CONF_RSP 0x05
106#define L2CAP_DISCONN_REQ 0x06
107#define L2CAP_DISCONN_RSP 0x07
108#define L2CAP_ECHO_REQ 0x08
109#define L2CAP_ECHO_RSP 0x09
110#define L2CAP_INFO_REQ 0x0a
111#define L2CAP_INFO_RSP 0x0b
112#define L2CAP_CREATE_CHAN_REQ 0x0c
113#define L2CAP_CREATE_CHAN_RSP 0x0d
114#define L2CAP_MOVE_CHAN_REQ 0x0e
115#define L2CAP_MOVE_CHAN_RSP 0x0f
116#define L2CAP_MOVE_CHAN_CFM 0x10
117#define L2CAP_MOVE_CHAN_CFM_RSP 0x11
118#define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
119#define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
120#define L2CAP_LE_CONN_REQ 0x14
121#define L2CAP_LE_CONN_RSP 0x15
122#define L2CAP_LE_CREDITS 0x16
123#define L2CAP_ECRED_CONN_REQ 0x17
124#define L2CAP_ECRED_CONN_RSP 0x18
125#define L2CAP_ECRED_RECONF_REQ 0x19
126#define L2CAP_ECRED_RECONF_RSP 0x1a
127
128
129#define L2CAP_FEAT_FLOWCTL 0x00000001
130#define L2CAP_FEAT_RETRANS 0x00000002
131#define L2CAP_FEAT_BIDIR_QOS 0x00000004
132#define L2CAP_FEAT_ERTM 0x00000008
133#define L2CAP_FEAT_STREAMING 0x00000010
134#define L2CAP_FEAT_FCS 0x00000020
135#define L2CAP_FEAT_EXT_FLOW 0x00000040
136#define L2CAP_FEAT_FIXED_CHAN 0x00000080
137#define L2CAP_FEAT_EXT_WINDOW 0x00000100
138#define L2CAP_FEAT_UCD 0x00000200
139
140
141#define L2CAP_FCS_NONE 0x00
142#define L2CAP_FCS_CRC16 0x01
143
144
145#define L2CAP_FC_SIG_BREDR 0x02
146#define L2CAP_FC_CONNLESS 0x04
147#define L2CAP_FC_A2MP 0x08
148#define L2CAP_FC_ATT 0x10
149#define L2CAP_FC_SIG_LE 0x20
150#define L2CAP_FC_SMP_LE 0x40
151#define L2CAP_FC_SMP_BREDR 0x80
152
153
154#define L2CAP_CTRL_SAR 0xC000
155#define L2CAP_CTRL_REQSEQ 0x3F00
156#define L2CAP_CTRL_TXSEQ 0x007E
157#define L2CAP_CTRL_SUPERVISE 0x000C
158
159#define L2CAP_CTRL_RETRANS 0x0080
160#define L2CAP_CTRL_FINAL 0x0080
161#define L2CAP_CTRL_POLL 0x0010
162#define L2CAP_CTRL_FRAME_TYPE 0x0001
163
164#define L2CAP_CTRL_TXSEQ_SHIFT 1
165#define L2CAP_CTRL_SUPER_SHIFT 2
166#define L2CAP_CTRL_POLL_SHIFT 4
167#define L2CAP_CTRL_FINAL_SHIFT 7
168#define L2CAP_CTRL_REQSEQ_SHIFT 8
169#define L2CAP_CTRL_SAR_SHIFT 14
170
171
172#define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
173#define L2CAP_EXT_CTRL_SAR 0x00030000
174#define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
175#define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
176
177#define L2CAP_EXT_CTRL_POLL 0x00040000
178#define L2CAP_EXT_CTRL_FINAL 0x00000002
179#define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001
180
181#define L2CAP_EXT_CTRL_FINAL_SHIFT 1
182#define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
183#define L2CAP_EXT_CTRL_SAR_SHIFT 16
184#define L2CAP_EXT_CTRL_SUPER_SHIFT 16
185#define L2CAP_EXT_CTRL_POLL_SHIFT 18
186#define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
187
188
189#define L2CAP_SUPER_RR 0x00
190#define L2CAP_SUPER_REJ 0x01
191#define L2CAP_SUPER_RNR 0x02
192#define L2CAP_SUPER_SREJ 0x03
193
194
195#define L2CAP_SAR_UNSEGMENTED 0x00
196#define L2CAP_SAR_START 0x01
197#define L2CAP_SAR_END 0x02
198#define L2CAP_SAR_CONTINUE 0x03
199
200
201#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
202#define L2CAP_REJ_MTU_EXCEEDED 0x0001
203#define L2CAP_REJ_INVALID_CID 0x0002
204
205
206struct l2cap_hdr {
207 __le16 len;
208 __le16 cid;
209} __packed;
210#define L2CAP_LEN_SIZE 2
211#define L2CAP_HDR_SIZE 4
212#define L2CAP_ENH_HDR_SIZE 6
213#define L2CAP_EXT_HDR_SIZE 8
214
215#define L2CAP_FCS_SIZE 2
216#define L2CAP_SDULEN_SIZE 2
217#define L2CAP_PSMLEN_SIZE 2
218#define L2CAP_ENH_CTRL_SIZE 2
219#define L2CAP_EXT_CTRL_SIZE 4
220
221struct l2cap_cmd_hdr {
222 __u8 code;
223 __u8 ident;
224 __le16 len;
225} __packed;
226#define L2CAP_CMD_HDR_SIZE 4
227
228struct l2cap_cmd_rej_unk {
229 __le16 reason;
230} __packed;
231
232struct l2cap_cmd_rej_mtu {
233 __le16 reason;
234 __le16 max_mtu;
235} __packed;
236
237struct l2cap_cmd_rej_cid {
238 __le16 reason;
239 __le16 scid;
240 __le16 dcid;
241} __packed;
242
243struct l2cap_conn_req {
244 __le16 psm;
245 __le16 scid;
246} __packed;
247
248struct l2cap_conn_rsp {
249 __le16 dcid;
250 __le16 scid;
251 __le16 result;
252 __le16 status;
253} __packed;
254
255
256#define L2CAP_PSM_SDP 0x0001
257#define L2CAP_PSM_RFCOMM 0x0003
258#define L2CAP_PSM_3DSP 0x0021
259#define L2CAP_PSM_IPSP 0x0023
260
261#define L2CAP_PSM_DYN_START 0x1001
262#define L2CAP_PSM_DYN_END 0xffff
263#define L2CAP_PSM_AUTO_END 0x10ff
264#define L2CAP_PSM_LE_DYN_START 0x0080
265#define L2CAP_PSM_LE_DYN_END 0x00ff
266
267
268#define L2CAP_CID_SIGNALING 0x0001
269#define L2CAP_CID_CONN_LESS 0x0002
270#define L2CAP_CID_A2MP 0x0003
271#define L2CAP_CID_ATT 0x0004
272#define L2CAP_CID_LE_SIGNALING 0x0005
273#define L2CAP_CID_SMP 0x0006
274#define L2CAP_CID_SMP_BREDR 0x0007
275#define L2CAP_CID_DYN_START 0x0040
276#define L2CAP_CID_DYN_END 0xffff
277#define L2CAP_CID_LE_DYN_END 0x007f
278
279
280#define L2CAP_CR_SUCCESS 0x0000
281#define L2CAP_CR_PEND 0x0001
282#define L2CAP_CR_BAD_PSM 0x0002
283#define L2CAP_CR_SEC_BLOCK 0x0003
284#define L2CAP_CR_NO_MEM 0x0004
285#define L2CAP_CR_BAD_AMP 0x0005
286#define L2CAP_CR_INVALID_SCID 0x0006
287#define L2CAP_CR_SCID_IN_USE 0x0007
288
289
290#define L2CAP_CR_LE_SUCCESS 0x0000
291#define L2CAP_CR_LE_BAD_PSM 0x0002
292#define L2CAP_CR_LE_NO_MEM 0x0004
293#define L2CAP_CR_LE_AUTHENTICATION 0x0005
294#define L2CAP_CR_LE_AUTHORIZATION 0x0006
295#define L2CAP_CR_LE_BAD_KEY_SIZE 0x0007
296#define L2CAP_CR_LE_ENCRYPTION 0x0008
297#define L2CAP_CR_LE_INVALID_SCID 0x0009
298#define L2CAP_CR_LE_SCID_IN_USE 0X000A
299#define L2CAP_CR_LE_UNACCEPT_PARAMS 0X000B
300#define L2CAP_CR_LE_INVALID_PARAMS 0X000C
301
302
303#define L2CAP_CS_NO_INFO 0x0000
304#define L2CAP_CS_AUTHEN_PEND 0x0001
305#define L2CAP_CS_AUTHOR_PEND 0x0002
306
307struct l2cap_conf_req {
308 __le16 dcid;
309 __le16 flags;
310 __u8 data[];
311} __packed;
312
313struct l2cap_conf_rsp {
314 __le16 scid;
315 __le16 flags;
316 __le16 result;
317 __u8 data[];
318} __packed;
319
320#define L2CAP_CONF_SUCCESS 0x0000
321#define L2CAP_CONF_UNACCEPT 0x0001
322#define L2CAP_CONF_REJECT 0x0002
323#define L2CAP_CONF_UNKNOWN 0x0003
324#define L2CAP_CONF_PENDING 0x0004
325#define L2CAP_CONF_EFS_REJECT 0x0005
326
327
328#define L2CAP_CONF_FLAG_CONTINUATION 0x0001
329
330struct l2cap_conf_opt {
331 __u8 type;
332 __u8 len;
333 __u8 val[];
334} __packed;
335#define L2CAP_CONF_OPT_SIZE 2
336
337#define L2CAP_CONF_HINT 0x80
338#define L2CAP_CONF_MASK 0x7f
339
340#define L2CAP_CONF_MTU 0x01
341#define L2CAP_CONF_FLUSH_TO 0x02
342#define L2CAP_CONF_QOS 0x03
343#define L2CAP_CONF_RFC 0x04
344#define L2CAP_CONF_FCS 0x05
345#define L2CAP_CONF_EFS 0x06
346#define L2CAP_CONF_EWS 0x07
347
348#define L2CAP_CONF_MAX_SIZE 22
349
350struct l2cap_conf_rfc {
351 __u8 mode;
352 __u8 txwin_size;
353 __u8 max_transmit;
354 __le16 retrans_timeout;
355 __le16 monitor_timeout;
356 __le16 max_pdu_size;
357} __packed;
358
359#define L2CAP_MODE_BASIC 0x00
360#define L2CAP_MODE_RETRANS 0x01
361#define L2CAP_MODE_FLOWCTL 0x02
362#define L2CAP_MODE_ERTM 0x03
363#define L2CAP_MODE_STREAMING 0x04
364
365
366
367
368
369#define L2CAP_MODE_LE_FLOWCTL 0x80
370#define L2CAP_MODE_EXT_FLOWCTL 0x81
371
372struct l2cap_conf_efs {
373 __u8 id;
374 __u8 stype;
375 __le16 msdu;
376 __le32 sdu_itime;
377 __le32 acc_lat;
378 __le32 flush_to;
379} __packed;
380
381#define L2CAP_SERV_NOTRAFIC 0x00
382#define L2CAP_SERV_BESTEFFORT 0x01
383#define L2CAP_SERV_GUARANTEED 0x02
384
385#define L2CAP_BESTEFFORT_ID 0x01
386
387struct l2cap_disconn_req {
388 __le16 dcid;
389 __le16 scid;
390} __packed;
391
392struct l2cap_disconn_rsp {
393 __le16 dcid;
394 __le16 scid;
395} __packed;
396
397struct l2cap_info_req {
398 __le16 type;
399} __packed;
400
401struct l2cap_info_rsp {
402 __le16 type;
403 __le16 result;
404 __u8 data[];
405} __packed;
406
407struct l2cap_create_chan_req {
408 __le16 psm;
409 __le16 scid;
410 __u8 amp_id;
411} __packed;
412
413struct l2cap_create_chan_rsp {
414 __le16 dcid;
415 __le16 scid;
416 __le16 result;
417 __le16 status;
418} __packed;
419
420struct l2cap_move_chan_req {
421 __le16 icid;
422 __u8 dest_amp_id;
423} __packed;
424
425struct l2cap_move_chan_rsp {
426 __le16 icid;
427 __le16 result;
428} __packed;
429
430#define L2CAP_MR_SUCCESS 0x0000
431#define L2CAP_MR_PEND 0x0001
432#define L2CAP_MR_BAD_ID 0x0002
433#define L2CAP_MR_SAME_ID 0x0003
434#define L2CAP_MR_NOT_SUPP 0x0004
435#define L2CAP_MR_COLLISION 0x0005
436#define L2CAP_MR_NOT_ALLOWED 0x0006
437
438struct l2cap_move_chan_cfm {
439 __le16 icid;
440 __le16 result;
441} __packed;
442
443#define L2CAP_MC_CONFIRMED 0x0000
444#define L2CAP_MC_UNCONFIRMED 0x0001
445
446struct l2cap_move_chan_cfm_rsp {
447 __le16 icid;
448} __packed;
449
450
451#define L2CAP_IT_CL_MTU 0x0001
452#define L2CAP_IT_FEAT_MASK 0x0002
453#define L2CAP_IT_FIXED_CHAN 0x0003
454
455
456#define L2CAP_IR_SUCCESS 0x0000
457#define L2CAP_IR_NOTSUPP 0x0001
458
459struct l2cap_conn_param_update_req {
460 __le16 min;
461 __le16 max;
462 __le16 latency;
463 __le16 to_multiplier;
464} __packed;
465
466struct l2cap_conn_param_update_rsp {
467 __le16 result;
468} __packed;
469
470
471#define L2CAP_CONN_PARAM_ACCEPTED 0x0000
472#define L2CAP_CONN_PARAM_REJECTED 0x0001
473
474struct l2cap_le_conn_req {
475 __le16 psm;
476 __le16 scid;
477 __le16 mtu;
478 __le16 mps;
479 __le16 credits;
480} __packed;
481
482struct l2cap_le_conn_rsp {
483 __le16 dcid;
484 __le16 mtu;
485 __le16 mps;
486 __le16 credits;
487 __le16 result;
488} __packed;
489
490struct l2cap_le_credits {
491 __le16 cid;
492 __le16 credits;
493} __packed;
494
495#define L2CAP_ECRED_MIN_MTU 64
496#define L2CAP_ECRED_MIN_MPS 64
497#define L2CAP_ECRED_MAX_CID 5
498
499struct l2cap_ecred_conn_req {
500 __le16 psm;
501 __le16 mtu;
502 __le16 mps;
503 __le16 credits;
504 __le16 scid[];
505} __packed;
506
507struct l2cap_ecred_conn_rsp {
508 __le16 mtu;
509 __le16 mps;
510 __le16 credits;
511 __le16 result;
512 __le16 dcid[];
513};
514
515struct l2cap_ecred_reconf_req {
516 __le16 mtu;
517 __le16 mps;
518 __le16 scid[];
519} __packed;
520
521#define L2CAP_RECONF_SUCCESS 0x0000
522#define L2CAP_RECONF_INVALID_MTU 0x0001
523#define L2CAP_RECONF_INVALID_MPS 0x0002
524
525struct l2cap_ecred_reconf_rsp {
526 __le16 result;
527} __packed;
528
529
530struct l2cap_seq_list {
531 __u16 head;
532 __u16 tail;
533 __u16 mask;
534 __u16 *list;
535};
536
537#define L2CAP_SEQ_LIST_CLEAR 0xFFFF
538#define L2CAP_SEQ_LIST_TAIL 0x8000
539
540struct l2cap_chan {
541 struct l2cap_conn *conn;
542 struct hci_conn *hs_hcon;
543 struct hci_chan *hs_hchan;
544 struct kref kref;
545 atomic_t nesting;
546
547 __u8 state;
548
549 bdaddr_t dst;
550 __u8 dst_type;
551 bdaddr_t src;
552 __u8 src_type;
553 __le16 psm;
554 __le16 sport;
555 __u16 dcid;
556 __u16 scid;
557
558 __u16 imtu;
559 __u16 omtu;
560 __u16 flush_to;
561 __u8 mode;
562 __u8 chan_type;
563 __u8 chan_policy;
564
565 __u8 sec_level;
566
567 __u8 ident;
568
569 __u8 conf_req[64];
570 __u8 conf_len;
571 __u8 num_conf_req;
572 __u8 num_conf_rsp;
573
574 __u8 fcs;
575
576 __u16 tx_win;
577 __u16 tx_win_max;
578 __u16 ack_win;
579 __u8 max_tx;
580 __u16 retrans_timeout;
581 __u16 monitor_timeout;
582 __u16 mps;
583
584 __u16 tx_credits;
585 __u16 rx_credits;
586
587 __u8 tx_state;
588 __u8 rx_state;
589
590 unsigned long conf_state;
591 unsigned long conn_state;
592 unsigned long flags;
593
594 __u8 remote_amp_id;
595 __u8 local_amp_id;
596 __u8 move_id;
597 __u8 move_state;
598 __u8 move_role;
599
600 __u16 next_tx_seq;
601 __u16 expected_ack_seq;
602 __u16 expected_tx_seq;
603 __u16 buffer_seq;
604 __u16 srej_save_reqseq;
605 __u16 last_acked_seq;
606 __u16 frames_sent;
607 __u16 unacked_frames;
608 __u8 retry_count;
609 __u16 sdu_len;
610 struct sk_buff *sdu;
611 struct sk_buff *sdu_last_frag;
612
613 __u16 remote_tx_win;
614 __u8 remote_max_tx;
615 __u16 remote_mps;
616
617 __u8 local_id;
618 __u8 local_stype;
619 __u16 local_msdu;
620 __u32 local_sdu_itime;
621 __u32 local_acc_lat;
622 __u32 local_flush_to;
623
624 __u8 remote_id;
625 __u8 remote_stype;
626 __u16 remote_msdu;
627 __u32 remote_sdu_itime;
628 __u32 remote_acc_lat;
629 __u32 remote_flush_to;
630
631 struct delayed_work chan_timer;
632 struct delayed_work retrans_timer;
633 struct delayed_work monitor_timer;
634 struct delayed_work ack_timer;
635
636 struct sk_buff *tx_send_head;
637 struct sk_buff_head tx_q;
638 struct sk_buff_head srej_q;
639 struct l2cap_seq_list srej_list;
640 struct l2cap_seq_list retrans_list;
641
642 struct list_head list;
643 struct list_head global_l;
644
645 void *data;
646 const struct l2cap_ops *ops;
647 struct mutex lock;
648};
649
650struct l2cap_ops {
651 char *name;
652
653 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan);
654 int (*recv) (struct l2cap_chan * chan,
655 struct sk_buff *skb);
656 void (*teardown) (struct l2cap_chan *chan, int err);
657 void (*close) (struct l2cap_chan *chan);
658 void (*state_change) (struct l2cap_chan *chan,
659 int state, int err);
660 void (*ready) (struct l2cap_chan *chan);
661 void (*defer) (struct l2cap_chan *chan);
662 void (*resume) (struct l2cap_chan *chan);
663 void (*suspend) (struct l2cap_chan *chan);
664 void (*set_shutdown) (struct l2cap_chan *chan);
665 long (*get_sndtimeo) (struct l2cap_chan *chan);
666 struct pid *(*get_peer_pid) (struct l2cap_chan *chan);
667 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
668 unsigned long hdr_len,
669 unsigned long len, int nb);
670 int (*filter) (struct l2cap_chan * chan,
671 struct sk_buff *skb);
672};
673
674struct l2cap_conn {
675 struct hci_conn *hcon;
676 struct hci_chan *hchan;
677
678 unsigned int mtu;
679
680 __u32 feat_mask;
681 __u8 remote_fixed_chan;
682 __u8 local_fixed_chan;
683
684 __u8 info_state;
685 __u8 info_ident;
686
687 struct delayed_work info_timer;
688
689 struct sk_buff *rx_skb;
690 __u32 rx_len;
691 __u8 tx_ident;
692 struct mutex ident_lock;
693
694 struct sk_buff_head pending_rx;
695 struct work_struct pending_rx_work;
696
697 struct work_struct id_addr_update_work;
698
699 __u8 disc_reason;
700
701 struct l2cap_chan *smp;
702
703 struct list_head chan_l;
704 struct mutex chan_lock;
705 struct kref ref;
706 struct list_head users;
707};
708
709struct l2cap_user {
710 struct list_head list;
711 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user);
712 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user);
713};
714
715#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
716#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
717#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
718
719#define L2CAP_CHAN_RAW 1
720#define L2CAP_CHAN_CONN_LESS 2
721#define L2CAP_CHAN_CONN_ORIENTED 3
722#define L2CAP_CHAN_FIXED 4
723
724
725#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
726
727struct l2cap_pinfo {
728 struct bt_sock bt;
729 struct l2cap_chan *chan;
730 struct sk_buff *rx_busy_skb;
731};
732
733enum {
734 CONF_REQ_SENT,
735 CONF_INPUT_DONE,
736 CONF_OUTPUT_DONE,
737 CONF_MTU_DONE,
738 CONF_MODE_DONE,
739 CONF_CONNECT_PEND,
740 CONF_RECV_NO_FCS,
741 CONF_STATE2_DEVICE,
742 CONF_EWS_RECV,
743 CONF_LOC_CONF_PEND,
744 CONF_REM_CONF_PEND,
745 CONF_NOT_COMPLETE,
746};
747
748#define L2CAP_CONF_MAX_CONF_REQ 2
749#define L2CAP_CONF_MAX_CONF_RSP 2
750
751enum {
752 CONN_SREJ_SENT,
753 CONN_WAIT_F,
754 CONN_SREJ_ACT,
755 CONN_SEND_PBIT,
756 CONN_REMOTE_BUSY,
757 CONN_LOCAL_BUSY,
758 CONN_REJ_ACT,
759 CONN_SEND_FBIT,
760 CONN_RNR_SENT,
761};
762
763
764enum {
765 FLAG_ROLE_SWITCH,
766 FLAG_FORCE_ACTIVE,
767 FLAG_FORCE_RELIABLE,
768 FLAG_FLUSHABLE,
769 FLAG_EXT_CTRL,
770 FLAG_EFS_ENABLE,
771 FLAG_DEFER_SETUP,
772 FLAG_LE_CONN_REQ_SENT,
773 FLAG_ECRED_CONN_REQ_SENT,
774 FLAG_PENDING_SECURITY,
775 FLAG_HOLD_HCI_CONN,
776};
777
778
779
780
781
782
783enum {
784 L2CAP_NESTING_SMP,
785 L2CAP_NESTING_NORMAL,
786 L2CAP_NESTING_PARENT,
787};
788
789enum {
790 L2CAP_TX_STATE_XMIT,
791 L2CAP_TX_STATE_WAIT_F,
792};
793
794enum {
795 L2CAP_RX_STATE_RECV,
796 L2CAP_RX_STATE_SREJ_SENT,
797 L2CAP_RX_STATE_MOVE,
798 L2CAP_RX_STATE_WAIT_P,
799 L2CAP_RX_STATE_WAIT_F,
800};
801
802enum {
803 L2CAP_TXSEQ_EXPECTED,
804 L2CAP_TXSEQ_EXPECTED_SREJ,
805 L2CAP_TXSEQ_UNEXPECTED,
806 L2CAP_TXSEQ_UNEXPECTED_SREJ,
807 L2CAP_TXSEQ_DUPLICATE,
808 L2CAP_TXSEQ_DUPLICATE_SREJ,
809 L2CAP_TXSEQ_INVALID,
810 L2CAP_TXSEQ_INVALID_IGNORE,
811};
812
813enum {
814 L2CAP_EV_DATA_REQUEST,
815 L2CAP_EV_LOCAL_BUSY_DETECTED,
816 L2CAP_EV_LOCAL_BUSY_CLEAR,
817 L2CAP_EV_RECV_REQSEQ_AND_FBIT,
818 L2CAP_EV_RECV_FBIT,
819 L2CAP_EV_RETRANS_TO,
820 L2CAP_EV_MONITOR_TO,
821 L2CAP_EV_EXPLICIT_POLL,
822 L2CAP_EV_RECV_IFRAME,
823 L2CAP_EV_RECV_RR,
824 L2CAP_EV_RECV_REJ,
825 L2CAP_EV_RECV_RNR,
826 L2CAP_EV_RECV_SREJ,
827 L2CAP_EV_RECV_FRAME,
828};
829
830enum {
831 L2CAP_MOVE_ROLE_NONE,
832 L2CAP_MOVE_ROLE_INITIATOR,
833 L2CAP_MOVE_ROLE_RESPONDER,
834};
835
836enum {
837 L2CAP_MOVE_STABLE,
838 L2CAP_MOVE_WAIT_REQ,
839 L2CAP_MOVE_WAIT_RSP,
840 L2CAP_MOVE_WAIT_RSP_SUCCESS,
841 L2CAP_MOVE_WAIT_CONFIRM,
842 L2CAP_MOVE_WAIT_CONFIRM_RSP,
843 L2CAP_MOVE_WAIT_LOGICAL_COMP,
844 L2CAP_MOVE_WAIT_LOGICAL_CFM,
845 L2CAP_MOVE_WAIT_LOCAL_BUSY,
846 L2CAP_MOVE_WAIT_PREPARE,
847};
848
849void l2cap_chan_hold(struct l2cap_chan *c);
850void l2cap_chan_put(struct l2cap_chan *c);
851
852static inline void l2cap_chan_lock(struct l2cap_chan *chan)
853{
854 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting));
855}
856
857static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
858{
859 mutex_unlock(&chan->lock);
860}
861
862static inline void l2cap_set_timer(struct l2cap_chan *chan,
863 struct delayed_work *work, long timeout)
864{
865 BT_DBG("chan %p state %s timeout %ld", chan,
866 state_to_string(chan->state), timeout);
867
868
869
870 if (!cancel_delayed_work(work))
871 l2cap_chan_hold(chan);
872
873 schedule_delayed_work(work, timeout);
874}
875
876static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
877 struct delayed_work *work)
878{
879 bool ret;
880
881
882
883 ret = cancel_delayed_work(work);
884 if (ret)
885 l2cap_chan_put(chan);
886
887 return ret;
888}
889
890#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
891#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
892#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
893#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
894#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
895 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
896#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
897
898static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
899{
900 if (seq1 >= seq2)
901 return seq1 - seq2;
902 else
903 return chan->tx_win_max + 1 - seq2 + seq1;
904}
905
906static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
907{
908 return (seq + 1) % (chan->tx_win_max + 1);
909}
910
911static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
912{
913 return NULL;
914}
915
916static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb)
917{
918 return -ENOSYS;
919}
920
921static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan,
922 unsigned long hdr_len,
923 unsigned long len, int nb)
924{
925 return ERR_PTR(-ENOSYS);
926}
927
928static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
929{
930}
931
932static inline void l2cap_chan_no_close(struct l2cap_chan *chan)
933{
934}
935
936static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
937{
938}
939
940static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan,
941 int state, int err)
942{
943}
944
945static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
946{
947}
948
949static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan)
950{
951}
952
953static inline void l2cap_chan_no_resume(struct l2cap_chan *chan)
954{
955}
956
957static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan)
958{
959}
960
961static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
962{
963 return 0;
964}
965
966extern bool disable_ertm;
967extern bool enable_ecred;
968
969int l2cap_init_sockets(void);
970void l2cap_cleanup_sockets(void);
971bool l2cap_is_socket(struct socket *sock);
972
973void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan);
974void __l2cap_ecred_conn_rsp_defer(struct l2cap_chan *chan);
975void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
976
977int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
978int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
979
980struct l2cap_chan *l2cap_chan_create(void);
981void l2cap_chan_close(struct l2cap_chan *chan, int reason);
982int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
983 bdaddr_t *dst, u8 dst_type);
984int l2cap_chan_reconfigure(struct l2cap_chan *chan, __u16 mtu);
985int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len);
986void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
987int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator);
988void l2cap_chan_set_defaults(struct l2cap_chan *chan);
989int l2cap_ertm_init(struct l2cap_chan *chan);
990void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
991void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
992typedef void (*l2cap_chan_func_t)(struct l2cap_chan *chan, void *data);
993void l2cap_chan_list(struct l2cap_conn *conn, l2cap_chan_func_t func,
994 void *data);
995void l2cap_chan_del(struct l2cap_chan *chan, int err);
996void l2cap_send_conn_req(struct l2cap_chan *chan);
997void l2cap_move_start(struct l2cap_chan *chan);
998void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
999 u8 status);
1000void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
1001
1002struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn);
1003void l2cap_conn_put(struct l2cap_conn *conn);
1004
1005int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user);
1006void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user);
1007
1008#endif
1009
