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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_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 /* 2 seconds */
41#define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
42#define L2CAP_DEFAULT_MAX_PDU_SIZE 1492 /* Sized for AMP packet */
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 /* 3-DH5 packet */
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/* L2CAP socket address */
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/* L2CAP socket options */
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/* L2CAP command codes */
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/* L2CAP extended feature mask */
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/* L2CAP checksum option */
133#define L2CAP_FCS_NONE 0x00
134#define L2CAP_FCS_CRC16 0x01
135
136/* L2CAP fixed channels */
137#define L2CAP_FC_L2CAP 0x02
138#define L2CAP_FC_CONNLESS 0x04
139#define L2CAP_FC_A2MP 0x08
140#define L2CAP_FC_6LOWPAN 0x3e /* reserved and temporary value */
141
142/* L2CAP Control Field bit masks */
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 /* I- or S-Frame */
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/* L2CAP Extended Control Field bit mask */
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 /* I- or S-Frame */
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/* L2CAP Supervisory Function */
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/* L2CAP Segmentation and Reassembly */
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/* L2CAP Command rej. reasons */
190#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
191#define L2CAP_REJ_MTU_EXCEEDED 0x0001
192#define L2CAP_REJ_INVALID_CID 0x0002
193
194/* L2CAP structures */
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/* protocol/service multiplexer (PSM) */
244#define L2CAP_PSM_SDP 0x0001
245#define L2CAP_PSM_RFCOMM 0x0003
246#define L2CAP_PSM_3DSP 0x0021
247
248/* channel identifier */
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/* connect/create channel results */
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/* connect/create channel status */
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/* configuration req/rsp continuation flag */
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/* Unlike the above this one doesn't actually map to anything that would
335 * ever be sent over the air. Therefore, use a value that's unlikely to
336 * ever be used in the BR/EDR configuration phase.
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/* info type */
419#define L2CAP_IT_CL_MTU 0x0001
420#define L2CAP_IT_FEAT_MASK 0x0002
421#define L2CAP_IT_FIXED_CHAN 0x0003
422
423/* info result */
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/* Connection Parameters result */
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/* ----- L2CAP channels and connections ----- */
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/* ----- L2CAP socket info ----- */
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/* Definitions for flags in l2cap_chan */
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 /* If delayed work cancelled do not hold(chan)
787 since it is already done with previous set_timer */
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 /* put(chan) if delayed work cancelled otherwise it
800 is done in delayed work function */
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 /* __L2CAP_H */
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#define L2CAP_BREDR_MAX_PAYLOAD 1019 /* 3-DH5 packet */
48
49#define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100)
50#define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000)
51#define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000)
52#define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000)
53#define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000)
54
55/* L2CAP socket address */
56struct sockaddr_l2 {
57 sa_family_t l2_family;
58 __le16 l2_psm;
59 bdaddr_t l2_bdaddr;
60 __le16 l2_cid;
61 __u8 l2_bdaddr_type;
62};
63
64/* L2CAP socket options */
65#define L2CAP_OPTIONS 0x01
66struct l2cap_options {
67 __u16 omtu;
68 __u16 imtu;
69 __u16 flush_to;
70 __u8 mode;
71 __u8 fcs;
72 __u8 max_tx;
73 __u16 txwin_size;
74};
75
76#define L2CAP_CONNINFO 0x02
77struct l2cap_conninfo {
78 __u16 hci_handle;
79 __u8 dev_class[3];
80};
81
82#define L2CAP_LM 0x03
83#define L2CAP_LM_MASTER 0x0001
84#define L2CAP_LM_AUTH 0x0002
85#define L2CAP_LM_ENCRYPT 0x0004
86#define L2CAP_LM_TRUSTED 0x0008
87#define L2CAP_LM_RELIABLE 0x0010
88#define L2CAP_LM_SECURE 0x0020
89
90/* L2CAP command codes */
91#define L2CAP_COMMAND_REJ 0x01
92#define L2CAP_CONN_REQ 0x02
93#define L2CAP_CONN_RSP 0x03
94#define L2CAP_CONF_REQ 0x04
95#define L2CAP_CONF_RSP 0x05
96#define L2CAP_DISCONN_REQ 0x06
97#define L2CAP_DISCONN_RSP 0x07
98#define L2CAP_ECHO_REQ 0x08
99#define L2CAP_ECHO_RSP 0x09
100#define L2CAP_INFO_REQ 0x0a
101#define L2CAP_INFO_RSP 0x0b
102#define L2CAP_CREATE_CHAN_REQ 0x0c
103#define L2CAP_CREATE_CHAN_RSP 0x0d
104#define L2CAP_MOVE_CHAN_REQ 0x0e
105#define L2CAP_MOVE_CHAN_RSP 0x0f
106#define L2CAP_MOVE_CHAN_CFM 0x10
107#define L2CAP_MOVE_CHAN_CFM_RSP 0x11
108#define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
109#define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
110
111/* L2CAP extended feature mask */
112#define L2CAP_FEAT_FLOWCTL 0x00000001
113#define L2CAP_FEAT_RETRANS 0x00000002
114#define L2CAP_FEAT_BIDIR_QOS 0x00000004
115#define L2CAP_FEAT_ERTM 0x00000008
116#define L2CAP_FEAT_STREAMING 0x00000010
117#define L2CAP_FEAT_FCS 0x00000020
118#define L2CAP_FEAT_EXT_FLOW 0x00000040
119#define L2CAP_FEAT_FIXED_CHAN 0x00000080
120#define L2CAP_FEAT_EXT_WINDOW 0x00000100
121#define L2CAP_FEAT_UCD 0x00000200
122
123/* L2CAP checksum option */
124#define L2CAP_FCS_NONE 0x00
125#define L2CAP_FCS_CRC16 0x01
126
127/* L2CAP fixed channels */
128#define L2CAP_FC_L2CAP 0x02
129#define L2CAP_FC_A2MP 0x08
130
131/* L2CAP Control Field bit masks */
132#define L2CAP_CTRL_SAR 0xC000
133#define L2CAP_CTRL_REQSEQ 0x3F00
134#define L2CAP_CTRL_TXSEQ 0x007E
135#define L2CAP_CTRL_SUPERVISE 0x000C
136
137#define L2CAP_CTRL_RETRANS 0x0080
138#define L2CAP_CTRL_FINAL 0x0080
139#define L2CAP_CTRL_POLL 0x0010
140#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
141
142#define L2CAP_CTRL_TXSEQ_SHIFT 1
143#define L2CAP_CTRL_SUPER_SHIFT 2
144#define L2CAP_CTRL_POLL_SHIFT 4
145#define L2CAP_CTRL_FINAL_SHIFT 7
146#define L2CAP_CTRL_REQSEQ_SHIFT 8
147#define L2CAP_CTRL_SAR_SHIFT 14
148
149/* L2CAP Extended Control Field bit mask */
150#define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
151#define L2CAP_EXT_CTRL_SAR 0x00030000
152#define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
153#define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
154
155#define L2CAP_EXT_CTRL_POLL 0x00040000
156#define L2CAP_EXT_CTRL_FINAL 0x00000002
157#define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
158
159#define L2CAP_EXT_CTRL_FINAL_SHIFT 1
160#define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
161#define L2CAP_EXT_CTRL_SAR_SHIFT 16
162#define L2CAP_EXT_CTRL_SUPER_SHIFT 16
163#define L2CAP_EXT_CTRL_POLL_SHIFT 18
164#define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
165
166/* L2CAP Supervisory Function */
167#define L2CAP_SUPER_RR 0x00
168#define L2CAP_SUPER_REJ 0x01
169#define L2CAP_SUPER_RNR 0x02
170#define L2CAP_SUPER_SREJ 0x03
171
172/* L2CAP Segmentation and Reassembly */
173#define L2CAP_SAR_UNSEGMENTED 0x00
174#define L2CAP_SAR_START 0x01
175#define L2CAP_SAR_END 0x02
176#define L2CAP_SAR_CONTINUE 0x03
177
178/* L2CAP Command rej. reasons */
179#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
180#define L2CAP_REJ_MTU_EXCEEDED 0x0001
181#define L2CAP_REJ_INVALID_CID 0x0002
182
183/* L2CAP structures */
184struct l2cap_hdr {
185 __le16 len;
186 __le16 cid;
187} __packed;
188#define L2CAP_HDR_SIZE 4
189#define L2CAP_ENH_HDR_SIZE 6
190#define L2CAP_EXT_HDR_SIZE 8
191
192#define L2CAP_FCS_SIZE 2
193#define L2CAP_SDULEN_SIZE 2
194#define L2CAP_PSMLEN_SIZE 2
195#define L2CAP_ENH_CTRL_SIZE 2
196#define L2CAP_EXT_CTRL_SIZE 4
197
198struct l2cap_cmd_hdr {
199 __u8 code;
200 __u8 ident;
201 __le16 len;
202} __packed;
203#define L2CAP_CMD_HDR_SIZE 4
204
205struct l2cap_cmd_rej_unk {
206 __le16 reason;
207} __packed;
208
209struct l2cap_cmd_rej_mtu {
210 __le16 reason;
211 __le16 max_mtu;
212} __packed;
213
214struct l2cap_cmd_rej_cid {
215 __le16 reason;
216 __le16 scid;
217 __le16 dcid;
218} __packed;
219
220struct l2cap_conn_req {
221 __le16 psm;
222 __le16 scid;
223} __packed;
224
225struct l2cap_conn_rsp {
226 __le16 dcid;
227 __le16 scid;
228 __le16 result;
229 __le16 status;
230} __packed;
231
232/* channel indentifier */
233#define L2CAP_CID_SIGNALING 0x0001
234#define L2CAP_CID_CONN_LESS 0x0002
235#define L2CAP_CID_LE_DATA 0x0004
236#define L2CAP_CID_LE_SIGNALING 0x0005
237#define L2CAP_CID_SMP 0x0006
238#define L2CAP_CID_DYN_START 0x0040
239#define L2CAP_CID_DYN_END 0xffff
240
241/* connect/create channel results */
242#define L2CAP_CR_SUCCESS 0x0000
243#define L2CAP_CR_PEND 0x0001
244#define L2CAP_CR_BAD_PSM 0x0002
245#define L2CAP_CR_SEC_BLOCK 0x0003
246#define L2CAP_CR_NO_MEM 0x0004
247#define L2CAP_CR_BAD_AMP 0x0005
248
249/* connect/create channel status */
250#define L2CAP_CS_NO_INFO 0x0000
251#define L2CAP_CS_AUTHEN_PEND 0x0001
252#define L2CAP_CS_AUTHOR_PEND 0x0002
253
254struct l2cap_conf_req {
255 __le16 dcid;
256 __le16 flags;
257 __u8 data[0];
258} __packed;
259
260struct l2cap_conf_rsp {
261 __le16 scid;
262 __le16 flags;
263 __le16 result;
264 __u8 data[0];
265} __packed;
266
267#define L2CAP_CONF_SUCCESS 0x0000
268#define L2CAP_CONF_UNACCEPT 0x0001
269#define L2CAP_CONF_REJECT 0x0002
270#define L2CAP_CONF_UNKNOWN 0x0003
271#define L2CAP_CONF_PENDING 0x0004
272#define L2CAP_CONF_EFS_REJECT 0x0005
273
274struct l2cap_conf_opt {
275 __u8 type;
276 __u8 len;
277 __u8 val[0];
278} __packed;
279#define L2CAP_CONF_OPT_SIZE 2
280
281#define L2CAP_CONF_HINT 0x80
282#define L2CAP_CONF_MASK 0x7f
283
284#define L2CAP_CONF_MTU 0x01
285#define L2CAP_CONF_FLUSH_TO 0x02
286#define L2CAP_CONF_QOS 0x03
287#define L2CAP_CONF_RFC 0x04
288#define L2CAP_CONF_FCS 0x05
289#define L2CAP_CONF_EFS 0x06
290#define L2CAP_CONF_EWS 0x07
291
292#define L2CAP_CONF_MAX_SIZE 22
293
294struct l2cap_conf_rfc {
295 __u8 mode;
296 __u8 txwin_size;
297 __u8 max_transmit;
298 __le16 retrans_timeout;
299 __le16 monitor_timeout;
300 __le16 max_pdu_size;
301} __packed;
302
303#define L2CAP_MODE_BASIC 0x00
304#define L2CAP_MODE_RETRANS 0x01
305#define L2CAP_MODE_FLOWCTL 0x02
306#define L2CAP_MODE_ERTM 0x03
307#define L2CAP_MODE_STREAMING 0x04
308
309struct l2cap_conf_efs {
310 __u8 id;
311 __u8 stype;
312 __le16 msdu;
313 __le32 sdu_itime;
314 __le32 acc_lat;
315 __le32 flush_to;
316} __packed;
317
318#define L2CAP_SERV_NOTRAFIC 0x00
319#define L2CAP_SERV_BESTEFFORT 0x01
320#define L2CAP_SERV_GUARANTEED 0x02
321
322#define L2CAP_BESTEFFORT_ID 0x01
323
324struct l2cap_disconn_req {
325 __le16 dcid;
326 __le16 scid;
327} __packed;
328
329struct l2cap_disconn_rsp {
330 __le16 dcid;
331 __le16 scid;
332} __packed;
333
334struct l2cap_info_req {
335 __le16 type;
336} __packed;
337
338struct l2cap_info_rsp {
339 __le16 type;
340 __le16 result;
341 __u8 data[0];
342} __packed;
343
344struct l2cap_create_chan_req {
345 __le16 psm;
346 __le16 scid;
347 __u8 amp_id;
348} __packed;
349
350struct l2cap_create_chan_rsp {
351 __le16 dcid;
352 __le16 scid;
353 __le16 result;
354 __le16 status;
355} __packed;
356
357struct l2cap_move_chan_req {
358 __le16 icid;
359 __u8 dest_amp_id;
360} __packed;
361
362struct l2cap_move_chan_rsp {
363 __le16 icid;
364 __le16 result;
365} __packed;
366
367#define L2CAP_MR_SUCCESS 0x0000
368#define L2CAP_MR_PEND 0x0001
369#define L2CAP_MR_BAD_ID 0x0002
370#define L2CAP_MR_SAME_ID 0x0003
371#define L2CAP_MR_NOT_SUPP 0x0004
372#define L2CAP_MR_COLLISION 0x0005
373#define L2CAP_MR_NOT_ALLOWED 0x0006
374
375struct l2cap_move_chan_cfm {
376 __le16 icid;
377 __le16 result;
378} __packed;
379
380#define L2CAP_MC_CONFIRMED 0x0000
381#define L2CAP_MC_UNCONFIRMED 0x0001
382
383struct l2cap_move_chan_cfm_rsp {
384 __le16 icid;
385} __packed;
386
387/* info type */
388#define L2CAP_IT_CL_MTU 0x0001
389#define L2CAP_IT_FEAT_MASK 0x0002
390#define L2CAP_IT_FIXED_CHAN 0x0003
391
392/* info result */
393#define L2CAP_IR_SUCCESS 0x0000
394#define L2CAP_IR_NOTSUPP 0x0001
395
396struct l2cap_conn_param_update_req {
397 __le16 min;
398 __le16 max;
399 __le16 latency;
400 __le16 to_multiplier;
401} __packed;
402
403struct l2cap_conn_param_update_rsp {
404 __le16 result;
405} __packed;
406
407/* Connection Parameters result */
408#define L2CAP_CONN_PARAM_ACCEPTED 0x0000
409#define L2CAP_CONN_PARAM_REJECTED 0x0001
410
411/* ----- L2CAP channels and connections ----- */
412struct l2cap_seq_list {
413 __u16 head;
414 __u16 tail;
415 __u16 mask;
416 __u16 *list;
417};
418
419#define L2CAP_SEQ_LIST_CLEAR 0xFFFF
420#define L2CAP_SEQ_LIST_TAIL 0x8000
421
422struct srej_list {
423 __u16 tx_seq;
424 struct list_head list;
425};
426
427struct l2cap_chan {
428 struct sock *sk;
429
430 struct l2cap_conn *conn;
431
432 __u8 state;
433
434 atomic_t refcnt;
435
436 __le16 psm;
437 __u16 dcid;
438 __u16 scid;
439
440 __u16 imtu;
441 __u16 omtu;
442 __u16 flush_to;
443 __u8 mode;
444 __u8 chan_type;
445 __u8 chan_policy;
446
447 __le16 sport;
448
449 __u8 sec_level;
450
451 __u8 ident;
452
453 __u8 conf_req[64];
454 __u8 conf_len;
455 __u8 num_conf_req;
456 __u8 num_conf_rsp;
457
458 __u8 fcs;
459
460 __u16 tx_win;
461 __u16 tx_win_max;
462 __u8 max_tx;
463 __u16 retrans_timeout;
464 __u16 monitor_timeout;
465 __u16 mps;
466
467 __u8 tx_state;
468 __u8 rx_state;
469
470 unsigned long conf_state;
471 unsigned long conn_state;
472 unsigned long flags;
473
474 __u16 next_tx_seq;
475 __u16 expected_ack_seq;
476 __u16 expected_tx_seq;
477 __u16 buffer_seq;
478 __u16 buffer_seq_srej;
479 __u16 srej_save_reqseq;
480 __u16 last_acked_seq;
481 __u16 frames_sent;
482 __u16 unacked_frames;
483 __u8 retry_count;
484 __u16 srej_queue_next;
485 __u8 num_acked;
486 __u16 sdu_len;
487 struct sk_buff *sdu;
488 struct sk_buff *sdu_last_frag;
489
490 __u16 remote_tx_win;
491 __u8 remote_max_tx;
492 __u16 remote_mps;
493
494 __u8 local_id;
495 __u8 local_stype;
496 __u16 local_msdu;
497 __u32 local_sdu_itime;
498 __u32 local_acc_lat;
499 __u32 local_flush_to;
500
501 __u8 remote_id;
502 __u8 remote_stype;
503 __u16 remote_msdu;
504 __u32 remote_sdu_itime;
505 __u32 remote_acc_lat;
506 __u32 remote_flush_to;
507
508 struct delayed_work chan_timer;
509 struct delayed_work retrans_timer;
510 struct delayed_work monitor_timer;
511 struct delayed_work ack_timer;
512
513 struct sk_buff *tx_send_head;
514 struct sk_buff_head tx_q;
515 struct sk_buff_head srej_q;
516 struct l2cap_seq_list srej_list;
517 struct l2cap_seq_list retrans_list;
518 struct list_head srej_l;
519
520 struct list_head list;
521 struct list_head global_l;
522
523 void *data;
524 struct l2cap_ops *ops;
525 struct mutex lock;
526};
527
528struct l2cap_ops {
529 char *name;
530
531 struct l2cap_chan *(*new_connection) (void *data);
532 int (*recv) (void *data, struct sk_buff *skb);
533 void (*close) (void *data);
534 void (*state_change) (void *data, int state);
535 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
536 unsigned long len, int nb);
537};
538
539struct l2cap_conn {
540 struct hci_conn *hcon;
541 struct hci_chan *hchan;
542
543 bdaddr_t *dst;
544 bdaddr_t *src;
545
546 unsigned int mtu;
547
548 __u32 feat_mask;
549 __u8 fixed_chan_mask;
550
551 __u8 info_state;
552 __u8 info_ident;
553
554 struct delayed_work info_timer;
555
556 spinlock_t lock;
557
558 struct sk_buff *rx_skb;
559 __u32 rx_len;
560 __u8 tx_ident;
561
562 __u8 disc_reason;
563
564 struct delayed_work security_timer;
565 struct smp_chan *smp_chan;
566
567 struct list_head chan_l;
568 struct mutex chan_lock;
569};
570
571#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
572#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
573#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
574
575#define L2CAP_CHAN_RAW 1
576#define L2CAP_CHAN_CONN_LESS 2
577#define L2CAP_CHAN_CONN_ORIENTED 3
578
579/* ----- L2CAP socket info ----- */
580#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
581
582struct l2cap_pinfo {
583 struct bt_sock bt;
584 struct l2cap_chan *chan;
585 struct sk_buff *rx_busy_skb;
586};
587
588enum {
589 CONF_REQ_SENT,
590 CONF_INPUT_DONE,
591 CONF_OUTPUT_DONE,
592 CONF_MTU_DONE,
593 CONF_MODE_DONE,
594 CONF_CONNECT_PEND,
595 CONF_NO_FCS_RECV,
596 CONF_STATE2_DEVICE,
597 CONF_EWS_RECV,
598 CONF_LOC_CONF_PEND,
599 CONF_REM_CONF_PEND,
600};
601
602#define L2CAP_CONF_MAX_CONF_REQ 2
603#define L2CAP_CONF_MAX_CONF_RSP 2
604
605enum {
606 CONN_SREJ_SENT,
607 CONN_WAIT_F,
608 CONN_SREJ_ACT,
609 CONN_SEND_PBIT,
610 CONN_REMOTE_BUSY,
611 CONN_LOCAL_BUSY,
612 CONN_REJ_ACT,
613 CONN_SEND_FBIT,
614 CONN_RNR_SENT,
615};
616
617/* Definitions for flags in l2cap_chan */
618enum {
619 FLAG_ROLE_SWITCH,
620 FLAG_FORCE_ACTIVE,
621 FLAG_FORCE_RELIABLE,
622 FLAG_FLUSHABLE,
623 FLAG_EXT_CTRL,
624 FLAG_EFS_ENABLE,
625};
626
627enum {
628 L2CAP_TX_STATE_XMIT,
629 L2CAP_TX_STATE_WAIT_F,
630};
631
632enum {
633 L2CAP_RX_STATE_RECV,
634 L2CAP_RX_STATE_SREJ_SENT,
635};
636
637enum {
638 L2CAP_TXSEQ_EXPECTED,
639 L2CAP_TXSEQ_EXPECTED_SREJ,
640 L2CAP_TXSEQ_UNEXPECTED,
641 L2CAP_TXSEQ_UNEXPECTED_SREJ,
642 L2CAP_TXSEQ_DUPLICATE,
643 L2CAP_TXSEQ_DUPLICATE_SREJ,
644 L2CAP_TXSEQ_INVALID,
645 L2CAP_TXSEQ_INVALID_IGNORE,
646};
647
648enum {
649 L2CAP_EV_DATA_REQUEST,
650 L2CAP_EV_LOCAL_BUSY_DETECTED,
651 L2CAP_EV_LOCAL_BUSY_CLEAR,
652 L2CAP_EV_RECV_REQSEQ_AND_FBIT,
653 L2CAP_EV_RECV_FBIT,
654 L2CAP_EV_RETRANS_TO,
655 L2CAP_EV_MONITOR_TO,
656 L2CAP_EV_EXPLICIT_POLL,
657 L2CAP_EV_RECV_IFRAME,
658 L2CAP_EV_RECV_RR,
659 L2CAP_EV_RECV_REJ,
660 L2CAP_EV_RECV_RNR,
661 L2CAP_EV_RECV_SREJ,
662 L2CAP_EV_RECV_FRAME,
663};
664
665static inline void l2cap_chan_hold(struct l2cap_chan *c)
666{
667 atomic_inc(&c->refcnt);
668}
669
670static inline void l2cap_chan_put(struct l2cap_chan *c)
671{
672 if (atomic_dec_and_test(&c->refcnt))
673 kfree(c);
674}
675
676static inline void l2cap_chan_lock(struct l2cap_chan *chan)
677{
678 mutex_lock(&chan->lock);
679}
680
681static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
682{
683 mutex_unlock(&chan->lock);
684}
685
686static inline void l2cap_set_timer(struct l2cap_chan *chan,
687 struct delayed_work *work, long timeout)
688{
689 BT_DBG("chan %p state %s timeout %ld", chan,
690 state_to_string(chan->state), timeout);
691
692 /* If delayed work cancelled do not hold(chan)
693 since it is already done with previous set_timer */
694 if (!cancel_delayed_work(work))
695 l2cap_chan_hold(chan);
696
697 schedule_delayed_work(work, timeout);
698}
699
700static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
701 struct delayed_work *work)
702{
703 bool ret;
704
705 /* put(chan) if delayed work cancelled otherwise it
706 is done in delayed work function */
707 ret = cancel_delayed_work(work);
708 if (ret)
709 l2cap_chan_put(chan);
710
711 return ret;
712}
713
714#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
715#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
716#define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
717 msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO));
718#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
719#define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
720 msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO));
721#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
722#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
723 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
724#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
725
726static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
727{
728 if (seq1 >= seq2)
729 return seq1 - seq2;
730 else
731 return chan->tx_win_max + 1 - seq2 + seq1;
732}
733
734static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
735{
736 return (seq + 1) % (chan->tx_win_max + 1);
737}
738
739static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
740{
741 int sub;
742
743 sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
744
745 if (sub < 0)
746 sub += 64;
747
748 return sub == ch->remote_tx_win;
749}
750
751static inline __u16 __get_reqseq(struct l2cap_chan *chan, __u32 ctrl)
752{
753 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
754 return (ctrl & L2CAP_EXT_CTRL_REQSEQ) >>
755 L2CAP_EXT_CTRL_REQSEQ_SHIFT;
756 else
757 return (ctrl & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT;
758}
759
760static inline __u32 __set_reqseq(struct l2cap_chan *chan, __u32 reqseq)
761{
762 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
763 return (reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT) &
764 L2CAP_EXT_CTRL_REQSEQ;
765 else
766 return (reqseq << L2CAP_CTRL_REQSEQ_SHIFT) & L2CAP_CTRL_REQSEQ;
767}
768
769static inline __u16 __get_txseq(struct l2cap_chan *chan, __u32 ctrl)
770{
771 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
772 return (ctrl & L2CAP_EXT_CTRL_TXSEQ) >>
773 L2CAP_EXT_CTRL_TXSEQ_SHIFT;
774 else
775 return (ctrl & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT;
776}
777
778static inline __u32 __set_txseq(struct l2cap_chan *chan, __u32 txseq)
779{
780 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
781 return (txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT) &
782 L2CAP_EXT_CTRL_TXSEQ;
783 else
784 return (txseq << L2CAP_CTRL_TXSEQ_SHIFT) & L2CAP_CTRL_TXSEQ;
785}
786
787static inline bool __is_sframe(struct l2cap_chan *chan, __u32 ctrl)
788{
789 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
790 return ctrl & L2CAP_EXT_CTRL_FRAME_TYPE;
791 else
792 return ctrl & L2CAP_CTRL_FRAME_TYPE;
793}
794
795static inline __u32 __set_sframe(struct l2cap_chan *chan)
796{
797 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
798 return L2CAP_EXT_CTRL_FRAME_TYPE;
799 else
800 return L2CAP_CTRL_FRAME_TYPE;
801}
802
803static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl)
804{
805 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
806 return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
807 else
808 return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
809}
810
811static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar)
812{
813 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
814 return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR;
815 else
816 return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR;
817}
818
819static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl)
820{
821 return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START;
822}
823
824static inline __u32 __get_sar_mask(struct l2cap_chan *chan)
825{
826 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
827 return L2CAP_EXT_CTRL_SAR;
828 else
829 return L2CAP_CTRL_SAR;
830}
831
832static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl)
833{
834 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
835 return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >>
836 L2CAP_EXT_CTRL_SUPER_SHIFT;
837 else
838 return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;
839}
840
841static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super)
842{
843 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
844 return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) &
845 L2CAP_EXT_CTRL_SUPERVISE;
846 else
847 return (super << L2CAP_CTRL_SUPER_SHIFT) &
848 L2CAP_CTRL_SUPERVISE;
849}
850
851static inline __u32 __set_ctrl_final(struct l2cap_chan *chan)
852{
853 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
854 return L2CAP_EXT_CTRL_FINAL;
855 else
856 return L2CAP_CTRL_FINAL;
857}
858
859static inline bool __is_ctrl_final(struct l2cap_chan *chan, __u32 ctrl)
860{
861 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
862 return ctrl & L2CAP_EXT_CTRL_FINAL;
863 else
864 return ctrl & L2CAP_CTRL_FINAL;
865}
866
867static inline __u32 __set_ctrl_poll(struct l2cap_chan *chan)
868{
869 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
870 return L2CAP_EXT_CTRL_POLL;
871 else
872 return L2CAP_CTRL_POLL;
873}
874
875static inline bool __is_ctrl_poll(struct l2cap_chan *chan, __u32 ctrl)
876{
877 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
878 return ctrl & L2CAP_EXT_CTRL_POLL;
879 else
880 return ctrl & L2CAP_CTRL_POLL;
881}
882
883static inline __u32 __get_control(struct l2cap_chan *chan, void *p)
884{
885 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
886 return get_unaligned_le32(p);
887 else
888 return get_unaligned_le16(p);
889}
890
891static inline void __put_control(struct l2cap_chan *chan, __u32 control,
892 void *p)
893{
894 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
895 return put_unaligned_le32(control, p);
896 else
897 return put_unaligned_le16(control, p);
898}
899
900static inline __u8 __ctrl_size(struct l2cap_chan *chan)
901{
902 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
903 return L2CAP_EXT_HDR_SIZE - L2CAP_HDR_SIZE;
904 else
905 return L2CAP_ENH_HDR_SIZE - L2CAP_HDR_SIZE;
906}
907
908extern bool disable_ertm;
909
910int l2cap_init_sockets(void);
911void l2cap_cleanup_sockets(void);
912
913void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
914int __l2cap_wait_ack(struct sock *sk);
915
916int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
917int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
918
919struct l2cap_chan *l2cap_chan_create(void);
920void l2cap_chan_close(struct l2cap_chan *chan, int reason);
921void l2cap_chan_destroy(struct l2cap_chan *chan);
922int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
923 bdaddr_t *dst, u8 dst_type);
924int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
925 u32 priority);
926void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
927int l2cap_chan_check_security(struct l2cap_chan *chan);
928void l2cap_chan_set_defaults(struct l2cap_chan *chan);
929
930#endif /* __L2CAP_H */