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Bluetooth: Add skeleton for BR/EDR SMP channel
[deliverable/linux.git] / include / net / bluetooth / 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 #include <linux/atomic.h>
32
33 /* L2CAP defaults */
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 /* 2 seconds */
42 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
43 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1492 /* Sized for AMP packet */
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 /* 3-DH5 packet */
49 #define L2CAP_LE_MIN_MTU 23
50
51 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100)
52 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000)
53 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000)
54 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000)
55 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000)
56 #define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000)
57 #define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000)
58
59 #define L2CAP_A2MP_DEFAULT_MTU 670
60
61 /* L2CAP socket address */
62 struct sockaddr_l2 {
63 sa_family_t l2_family;
64 __le16 l2_psm;
65 bdaddr_t l2_bdaddr;
66 __le16 l2_cid;
67 __u8 l2_bdaddr_type;
68 };
69
70 /* L2CAP socket options */
71 #define L2CAP_OPTIONS 0x01
72 struct l2cap_options {
73 __u16 omtu;
74 __u16 imtu;
75 __u16 flush_to;
76 __u8 mode;
77 __u8 fcs;
78 __u8 max_tx;
79 __u16 txwin_size;
80 };
81
82 #define L2CAP_CONNINFO 0x02
83 struct l2cap_conninfo {
84 __u16 hci_handle;
85 __u8 dev_class[3];
86 };
87
88 #define L2CAP_LM 0x03
89 #define L2CAP_LM_MASTER 0x0001
90 #define L2CAP_LM_AUTH 0x0002
91 #define L2CAP_LM_ENCRYPT 0x0004
92 #define L2CAP_LM_TRUSTED 0x0008
93 #define L2CAP_LM_RELIABLE 0x0010
94 #define L2CAP_LM_SECURE 0x0020
95 #define L2CAP_LM_FIPS 0x0040
96
97 /* L2CAP command codes */
98 #define L2CAP_COMMAND_REJ 0x01
99 #define L2CAP_CONN_REQ 0x02
100 #define L2CAP_CONN_RSP 0x03
101 #define L2CAP_CONF_REQ 0x04
102 #define L2CAP_CONF_RSP 0x05
103 #define L2CAP_DISCONN_REQ 0x06
104 #define L2CAP_DISCONN_RSP 0x07
105 #define L2CAP_ECHO_REQ 0x08
106 #define L2CAP_ECHO_RSP 0x09
107 #define L2CAP_INFO_REQ 0x0a
108 #define L2CAP_INFO_RSP 0x0b
109 #define L2CAP_CREATE_CHAN_REQ 0x0c
110 #define L2CAP_CREATE_CHAN_RSP 0x0d
111 #define L2CAP_MOVE_CHAN_REQ 0x0e
112 #define L2CAP_MOVE_CHAN_RSP 0x0f
113 #define L2CAP_MOVE_CHAN_CFM 0x10
114 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11
115 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
116 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
117 #define L2CAP_LE_CONN_REQ 0x14
118 #define L2CAP_LE_CONN_RSP 0x15
119 #define L2CAP_LE_CREDITS 0x16
120
121 /* L2CAP extended feature mask */
122 #define L2CAP_FEAT_FLOWCTL 0x00000001
123 #define L2CAP_FEAT_RETRANS 0x00000002
124 #define L2CAP_FEAT_BIDIR_QOS 0x00000004
125 #define L2CAP_FEAT_ERTM 0x00000008
126 #define L2CAP_FEAT_STREAMING 0x00000010
127 #define L2CAP_FEAT_FCS 0x00000020
128 #define L2CAP_FEAT_EXT_FLOW 0x00000040
129 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
130 #define L2CAP_FEAT_EXT_WINDOW 0x00000100
131 #define L2CAP_FEAT_UCD 0x00000200
132
133 /* L2CAP checksum option */
134 #define L2CAP_FCS_NONE 0x00
135 #define L2CAP_FCS_CRC16 0x01
136
137 /* L2CAP fixed channels */
138 #define L2CAP_FC_SIG_BREDR 0x02
139 #define L2CAP_FC_CONNLESS 0x04
140 #define L2CAP_FC_A2MP 0x08
141 #define L2CAP_FC_ATT 0x10
142 #define L2CAP_FC_SIG_LE 0x20
143 #define L2CAP_FC_SMP_LE 0x40
144 #define L2CAP_FC_SMP_BREDR 0x80
145
146 /* L2CAP Control Field bit masks */
147 #define L2CAP_CTRL_SAR 0xC000
148 #define L2CAP_CTRL_REQSEQ 0x3F00
149 #define L2CAP_CTRL_TXSEQ 0x007E
150 #define L2CAP_CTRL_SUPERVISE 0x000C
151
152 #define L2CAP_CTRL_RETRANS 0x0080
153 #define L2CAP_CTRL_FINAL 0x0080
154 #define L2CAP_CTRL_POLL 0x0010
155 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
156
157 #define L2CAP_CTRL_TXSEQ_SHIFT 1
158 #define L2CAP_CTRL_SUPER_SHIFT 2
159 #define L2CAP_CTRL_POLL_SHIFT 4
160 #define L2CAP_CTRL_FINAL_SHIFT 7
161 #define L2CAP_CTRL_REQSEQ_SHIFT 8
162 #define L2CAP_CTRL_SAR_SHIFT 14
163
164 /* L2CAP Extended Control Field bit mask */
165 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
166 #define L2CAP_EXT_CTRL_SAR 0x00030000
167 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
168 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
169
170 #define L2CAP_EXT_CTRL_POLL 0x00040000
171 #define L2CAP_EXT_CTRL_FINAL 0x00000002
172 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
173
174 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1
175 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
176 #define L2CAP_EXT_CTRL_SAR_SHIFT 16
177 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16
178 #define L2CAP_EXT_CTRL_POLL_SHIFT 18
179 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
180
181 /* L2CAP Supervisory Function */
182 #define L2CAP_SUPER_RR 0x00
183 #define L2CAP_SUPER_REJ 0x01
184 #define L2CAP_SUPER_RNR 0x02
185 #define L2CAP_SUPER_SREJ 0x03
186
187 /* L2CAP Segmentation and Reassembly */
188 #define L2CAP_SAR_UNSEGMENTED 0x00
189 #define L2CAP_SAR_START 0x01
190 #define L2CAP_SAR_END 0x02
191 #define L2CAP_SAR_CONTINUE 0x03
192
193 /* L2CAP Command rej. reasons */
194 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
195 #define L2CAP_REJ_MTU_EXCEEDED 0x0001
196 #define L2CAP_REJ_INVALID_CID 0x0002
197
198 /* L2CAP structures */
199 struct l2cap_hdr {
200 __le16 len;
201 __le16 cid;
202 } __packed;
203 #define L2CAP_HDR_SIZE 4
204 #define L2CAP_ENH_HDR_SIZE 6
205 #define L2CAP_EXT_HDR_SIZE 8
206
207 #define L2CAP_FCS_SIZE 2
208 #define L2CAP_SDULEN_SIZE 2
209 #define L2CAP_PSMLEN_SIZE 2
210 #define L2CAP_ENH_CTRL_SIZE 2
211 #define L2CAP_EXT_CTRL_SIZE 4
212
213 struct l2cap_cmd_hdr {
214 __u8 code;
215 __u8 ident;
216 __le16 len;
217 } __packed;
218 #define L2CAP_CMD_HDR_SIZE 4
219
220 struct l2cap_cmd_rej_unk {
221 __le16 reason;
222 } __packed;
223
224 struct l2cap_cmd_rej_mtu {
225 __le16 reason;
226 __le16 max_mtu;
227 } __packed;
228
229 struct l2cap_cmd_rej_cid {
230 __le16 reason;
231 __le16 scid;
232 __le16 dcid;
233 } __packed;
234
235 struct l2cap_conn_req {
236 __le16 psm;
237 __le16 scid;
238 } __packed;
239
240 struct l2cap_conn_rsp {
241 __le16 dcid;
242 __le16 scid;
243 __le16 result;
244 __le16 status;
245 } __packed;
246
247 /* protocol/service multiplexer (PSM) */
248 #define L2CAP_PSM_SDP 0x0001
249 #define L2CAP_PSM_RFCOMM 0x0003
250 #define L2CAP_PSM_3DSP 0x0021
251
252 /* channel identifier */
253 #define L2CAP_CID_SIGNALING 0x0001
254 #define L2CAP_CID_CONN_LESS 0x0002
255 #define L2CAP_CID_A2MP 0x0003
256 #define L2CAP_CID_ATT 0x0004
257 #define L2CAP_CID_LE_SIGNALING 0x0005
258 #define L2CAP_CID_SMP 0x0006
259 #define L2CAP_CID_SMP_BREDR 0x0007
260 #define L2CAP_CID_DYN_START 0x0040
261 #define L2CAP_CID_DYN_END 0xffff
262 #define L2CAP_CID_LE_DYN_END 0x007f
263
264 /* connect/create channel results */
265 #define L2CAP_CR_SUCCESS 0x0000
266 #define L2CAP_CR_PEND 0x0001
267 #define L2CAP_CR_BAD_PSM 0x0002
268 #define L2CAP_CR_SEC_BLOCK 0x0003
269 #define L2CAP_CR_NO_MEM 0x0004
270 #define L2CAP_CR_BAD_AMP 0x0005
271 #define L2CAP_CR_AUTHENTICATION 0x0005
272 #define L2CAP_CR_AUTHORIZATION 0x0006
273 #define L2CAP_CR_BAD_KEY_SIZE 0x0007
274 #define L2CAP_CR_ENCRYPTION 0x0008
275
276 /* connect/create channel status */
277 #define L2CAP_CS_NO_INFO 0x0000
278 #define L2CAP_CS_AUTHEN_PEND 0x0001
279 #define L2CAP_CS_AUTHOR_PEND 0x0002
280
281 struct l2cap_conf_req {
282 __le16 dcid;
283 __le16 flags;
284 __u8 data[0];
285 } __packed;
286
287 struct l2cap_conf_rsp {
288 __le16 scid;
289 __le16 flags;
290 __le16 result;
291 __u8 data[0];
292 } __packed;
293
294 #define L2CAP_CONF_SUCCESS 0x0000
295 #define L2CAP_CONF_UNACCEPT 0x0001
296 #define L2CAP_CONF_REJECT 0x0002
297 #define L2CAP_CONF_UNKNOWN 0x0003
298 #define L2CAP_CONF_PENDING 0x0004
299 #define L2CAP_CONF_EFS_REJECT 0x0005
300
301 /* configuration req/rsp continuation flag */
302 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001
303
304 struct l2cap_conf_opt {
305 __u8 type;
306 __u8 len;
307 __u8 val[0];
308 } __packed;
309 #define L2CAP_CONF_OPT_SIZE 2
310
311 #define L2CAP_CONF_HINT 0x80
312 #define L2CAP_CONF_MASK 0x7f
313
314 #define L2CAP_CONF_MTU 0x01
315 #define L2CAP_CONF_FLUSH_TO 0x02
316 #define L2CAP_CONF_QOS 0x03
317 #define L2CAP_CONF_RFC 0x04
318 #define L2CAP_CONF_FCS 0x05
319 #define L2CAP_CONF_EFS 0x06
320 #define L2CAP_CONF_EWS 0x07
321
322 #define L2CAP_CONF_MAX_SIZE 22
323
324 struct l2cap_conf_rfc {
325 __u8 mode;
326 __u8 txwin_size;
327 __u8 max_transmit;
328 __le16 retrans_timeout;
329 __le16 monitor_timeout;
330 __le16 max_pdu_size;
331 } __packed;
332
333 #define L2CAP_MODE_BASIC 0x00
334 #define L2CAP_MODE_RETRANS 0x01
335 #define L2CAP_MODE_FLOWCTL 0x02
336 #define L2CAP_MODE_ERTM 0x03
337 #define L2CAP_MODE_STREAMING 0x04
338
339 /* Unlike the above this one doesn't actually map to anything that would
340 * ever be sent over the air. Therefore, use a value that's unlikely to
341 * ever be used in the BR/EDR configuration phase.
342 */
343 #define L2CAP_MODE_LE_FLOWCTL 0x80
344
345 struct l2cap_conf_efs {
346 __u8 id;
347 __u8 stype;
348 __le16 msdu;
349 __le32 sdu_itime;
350 __le32 acc_lat;
351 __le32 flush_to;
352 } __packed;
353
354 #define L2CAP_SERV_NOTRAFIC 0x00
355 #define L2CAP_SERV_BESTEFFORT 0x01
356 #define L2CAP_SERV_GUARANTEED 0x02
357
358 #define L2CAP_BESTEFFORT_ID 0x01
359
360 struct l2cap_disconn_req {
361 __le16 dcid;
362 __le16 scid;
363 } __packed;
364
365 struct l2cap_disconn_rsp {
366 __le16 dcid;
367 __le16 scid;
368 } __packed;
369
370 struct l2cap_info_req {
371 __le16 type;
372 } __packed;
373
374 struct l2cap_info_rsp {
375 __le16 type;
376 __le16 result;
377 __u8 data[0];
378 } __packed;
379
380 struct l2cap_create_chan_req {
381 __le16 psm;
382 __le16 scid;
383 __u8 amp_id;
384 } __packed;
385
386 struct l2cap_create_chan_rsp {
387 __le16 dcid;
388 __le16 scid;
389 __le16 result;
390 __le16 status;
391 } __packed;
392
393 struct l2cap_move_chan_req {
394 __le16 icid;
395 __u8 dest_amp_id;
396 } __packed;
397
398 struct l2cap_move_chan_rsp {
399 __le16 icid;
400 __le16 result;
401 } __packed;
402
403 #define L2CAP_MR_SUCCESS 0x0000
404 #define L2CAP_MR_PEND 0x0001
405 #define L2CAP_MR_BAD_ID 0x0002
406 #define L2CAP_MR_SAME_ID 0x0003
407 #define L2CAP_MR_NOT_SUPP 0x0004
408 #define L2CAP_MR_COLLISION 0x0005
409 #define L2CAP_MR_NOT_ALLOWED 0x0006
410
411 struct l2cap_move_chan_cfm {
412 __le16 icid;
413 __le16 result;
414 } __packed;
415
416 #define L2CAP_MC_CONFIRMED 0x0000
417 #define L2CAP_MC_UNCONFIRMED 0x0001
418
419 struct l2cap_move_chan_cfm_rsp {
420 __le16 icid;
421 } __packed;
422
423 /* info type */
424 #define L2CAP_IT_CL_MTU 0x0001
425 #define L2CAP_IT_FEAT_MASK 0x0002
426 #define L2CAP_IT_FIXED_CHAN 0x0003
427
428 /* info result */
429 #define L2CAP_IR_SUCCESS 0x0000
430 #define L2CAP_IR_NOTSUPP 0x0001
431
432 struct l2cap_conn_param_update_req {
433 __le16 min;
434 __le16 max;
435 __le16 latency;
436 __le16 to_multiplier;
437 } __packed;
438
439 struct l2cap_conn_param_update_rsp {
440 __le16 result;
441 } __packed;
442
443 /* Connection Parameters result */
444 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000
445 #define L2CAP_CONN_PARAM_REJECTED 0x0001
446
447 #define L2CAP_LE_MAX_CREDITS 10
448 #define L2CAP_LE_DEFAULT_MPS 230
449
450 struct l2cap_le_conn_req {
451 __le16 psm;
452 __le16 scid;
453 __le16 mtu;
454 __le16 mps;
455 __le16 credits;
456 } __packed;
457
458 struct l2cap_le_conn_rsp {
459 __le16 dcid;
460 __le16 mtu;
461 __le16 mps;
462 __le16 credits;
463 __le16 result;
464 } __packed;
465
466 struct l2cap_le_credits {
467 __le16 cid;
468 __le16 credits;
469 } __packed;
470
471 /* ----- L2CAP channels and connections ----- */
472 struct l2cap_seq_list {
473 __u16 head;
474 __u16 tail;
475 __u16 mask;
476 __u16 *list;
477 };
478
479 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF
480 #define L2CAP_SEQ_LIST_TAIL 0x8000
481
482 struct l2cap_chan {
483 struct l2cap_conn *conn;
484 struct hci_conn *hs_hcon;
485 struct hci_chan *hs_hchan;
486 struct kref kref;
487 atomic_t nesting;
488
489 __u8 state;
490
491 bdaddr_t dst;
492 __u8 dst_type;
493 bdaddr_t src;
494 __u8 src_type;
495 __le16 psm;
496 __le16 sport;
497 __u16 dcid;
498 __u16 scid;
499
500 __u16 imtu;
501 __u16 omtu;
502 __u16 flush_to;
503 __u8 mode;
504 __u8 chan_type;
505 __u8 chan_policy;
506
507 __u8 sec_level;
508
509 __u8 ident;
510
511 __u8 conf_req[64];
512 __u8 conf_len;
513 __u8 num_conf_req;
514 __u8 num_conf_rsp;
515
516 __u8 fcs;
517
518 __u16 tx_win;
519 __u16 tx_win_max;
520 __u16 ack_win;
521 __u8 max_tx;
522 __u16 retrans_timeout;
523 __u16 monitor_timeout;
524 __u16 mps;
525
526 __u16 tx_credits;
527 __u16 rx_credits;
528
529 __u8 tx_state;
530 __u8 rx_state;
531
532 unsigned long conf_state;
533 unsigned long conn_state;
534 unsigned long flags;
535
536 __u8 remote_amp_id;
537 __u8 local_amp_id;
538 __u8 move_id;
539 __u8 move_state;
540 __u8 move_role;
541
542 __u16 next_tx_seq;
543 __u16 expected_ack_seq;
544 __u16 expected_tx_seq;
545 __u16 buffer_seq;
546 __u16 srej_save_reqseq;
547 __u16 last_acked_seq;
548 __u16 frames_sent;
549 __u16 unacked_frames;
550 __u8 retry_count;
551 __u16 sdu_len;
552 struct sk_buff *sdu;
553 struct sk_buff *sdu_last_frag;
554
555 __u16 remote_tx_win;
556 __u8 remote_max_tx;
557 __u16 remote_mps;
558
559 __u8 local_id;
560 __u8 local_stype;
561 __u16 local_msdu;
562 __u32 local_sdu_itime;
563 __u32 local_acc_lat;
564 __u32 local_flush_to;
565
566 __u8 remote_id;
567 __u8 remote_stype;
568 __u16 remote_msdu;
569 __u32 remote_sdu_itime;
570 __u32 remote_acc_lat;
571 __u32 remote_flush_to;
572
573 struct delayed_work chan_timer;
574 struct delayed_work retrans_timer;
575 struct delayed_work monitor_timer;
576 struct delayed_work ack_timer;
577
578 struct sk_buff *tx_send_head;
579 struct sk_buff_head tx_q;
580 struct sk_buff_head srej_q;
581 struct l2cap_seq_list srej_list;
582 struct l2cap_seq_list retrans_list;
583
584 struct list_head list;
585 struct list_head global_l;
586
587 void *data;
588 const struct l2cap_ops *ops;
589 struct mutex lock;
590 };
591
592 struct l2cap_ops {
593 char *name;
594
595 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan);
596 int (*recv) (struct l2cap_chan * chan,
597 struct sk_buff *skb);
598 void (*teardown) (struct l2cap_chan *chan, int err);
599 void (*close) (struct l2cap_chan *chan);
600 void (*state_change) (struct l2cap_chan *chan,
601 int state, int err);
602 void (*ready) (struct l2cap_chan *chan);
603 void (*defer) (struct l2cap_chan *chan);
604 void (*resume) (struct l2cap_chan *chan);
605 void (*suspend) (struct l2cap_chan *chan);
606 void (*set_shutdown) (struct l2cap_chan *chan);
607 long (*get_sndtimeo) (struct l2cap_chan *chan);
608 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
609 unsigned long hdr_len,
610 unsigned long len, int nb);
611 int (*memcpy_fromiovec) (struct l2cap_chan *chan,
612 unsigned char *kdata,
613 struct iovec *iov,
614 int len);
615 };
616
617 struct l2cap_conn {
618 struct hci_conn *hcon;
619 struct hci_chan *hchan;
620
621 unsigned int mtu;
622
623 __u32 feat_mask;
624 __u8 remote_fixed_chan;
625 __u8 local_fixed_chan;
626
627 __u8 info_state;
628 __u8 info_ident;
629
630 struct delayed_work info_timer;
631
632 struct sk_buff *rx_skb;
633 __u32 rx_len;
634 __u8 tx_ident;
635 struct mutex ident_lock;
636
637 struct sk_buff_head pending_rx;
638 struct work_struct pending_rx_work;
639
640 struct work_struct id_addr_update_work;
641
642 __u8 disc_reason;
643
644 struct l2cap_chan *smp;
645
646 struct list_head chan_l;
647 struct mutex chan_lock;
648 struct kref ref;
649 struct list_head users;
650 };
651
652 struct l2cap_user {
653 struct list_head list;
654 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user);
655 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user);
656 };
657
658 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
659 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
660 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
661
662 #define L2CAP_CHAN_RAW 1
663 #define L2CAP_CHAN_CONN_LESS 2
664 #define L2CAP_CHAN_CONN_ORIENTED 3
665 #define L2CAP_CHAN_FIXED 4
666
667 /* ----- L2CAP socket info ----- */
668 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
669
670 struct l2cap_pinfo {
671 struct bt_sock bt;
672 struct l2cap_chan *chan;
673 struct sk_buff *rx_busy_skb;
674 };
675
676 enum {
677 CONF_REQ_SENT,
678 CONF_INPUT_DONE,
679 CONF_OUTPUT_DONE,
680 CONF_MTU_DONE,
681 CONF_MODE_DONE,
682 CONF_CONNECT_PEND,
683 CONF_RECV_NO_FCS,
684 CONF_STATE2_DEVICE,
685 CONF_EWS_RECV,
686 CONF_LOC_CONF_PEND,
687 CONF_REM_CONF_PEND,
688 CONF_NOT_COMPLETE,
689 };
690
691 #define L2CAP_CONF_MAX_CONF_REQ 2
692 #define L2CAP_CONF_MAX_CONF_RSP 2
693
694 enum {
695 CONN_SREJ_SENT,
696 CONN_WAIT_F,
697 CONN_SREJ_ACT,
698 CONN_SEND_PBIT,
699 CONN_REMOTE_BUSY,
700 CONN_LOCAL_BUSY,
701 CONN_REJ_ACT,
702 CONN_SEND_FBIT,
703 CONN_RNR_SENT,
704 };
705
706 /* Definitions for flags in l2cap_chan */
707 enum {
708 FLAG_ROLE_SWITCH,
709 FLAG_FORCE_ACTIVE,
710 FLAG_FORCE_RELIABLE,
711 FLAG_FLUSHABLE,
712 FLAG_EXT_CTRL,
713 FLAG_EFS_ENABLE,
714 FLAG_DEFER_SETUP,
715 FLAG_LE_CONN_REQ_SENT,
716 FLAG_PENDING_SECURITY,
717 FLAG_HOLD_HCI_CONN,
718 };
719
720 /* Lock nesting levels for L2CAP channels. We need these because lockdep
721 * otherwise considers all channels equal and will e.g. complain about a
722 * connection oriented channel triggering SMP procedures or a listening
723 * channel creating and locking a child channel.
724 */
725 enum {
726 L2CAP_NESTING_SMP,
727 L2CAP_NESTING_NORMAL,
728 L2CAP_NESTING_PARENT,
729 };
730
731 enum {
732 L2CAP_TX_STATE_XMIT,
733 L2CAP_TX_STATE_WAIT_F,
734 };
735
736 enum {
737 L2CAP_RX_STATE_RECV,
738 L2CAP_RX_STATE_SREJ_SENT,
739 L2CAP_RX_STATE_MOVE,
740 L2CAP_RX_STATE_WAIT_P,
741 L2CAP_RX_STATE_WAIT_F,
742 };
743
744 enum {
745 L2CAP_TXSEQ_EXPECTED,
746 L2CAP_TXSEQ_EXPECTED_SREJ,
747 L2CAP_TXSEQ_UNEXPECTED,
748 L2CAP_TXSEQ_UNEXPECTED_SREJ,
749 L2CAP_TXSEQ_DUPLICATE,
750 L2CAP_TXSEQ_DUPLICATE_SREJ,
751 L2CAP_TXSEQ_INVALID,
752 L2CAP_TXSEQ_INVALID_IGNORE,
753 };
754
755 enum {
756 L2CAP_EV_DATA_REQUEST,
757 L2CAP_EV_LOCAL_BUSY_DETECTED,
758 L2CAP_EV_LOCAL_BUSY_CLEAR,
759 L2CAP_EV_RECV_REQSEQ_AND_FBIT,
760 L2CAP_EV_RECV_FBIT,
761 L2CAP_EV_RETRANS_TO,
762 L2CAP_EV_MONITOR_TO,
763 L2CAP_EV_EXPLICIT_POLL,
764 L2CAP_EV_RECV_IFRAME,
765 L2CAP_EV_RECV_RR,
766 L2CAP_EV_RECV_REJ,
767 L2CAP_EV_RECV_RNR,
768 L2CAP_EV_RECV_SREJ,
769 L2CAP_EV_RECV_FRAME,
770 };
771
772 enum {
773 L2CAP_MOVE_ROLE_NONE,
774 L2CAP_MOVE_ROLE_INITIATOR,
775 L2CAP_MOVE_ROLE_RESPONDER,
776 };
777
778 enum {
779 L2CAP_MOVE_STABLE,
780 L2CAP_MOVE_WAIT_REQ,
781 L2CAP_MOVE_WAIT_RSP,
782 L2CAP_MOVE_WAIT_RSP_SUCCESS,
783 L2CAP_MOVE_WAIT_CONFIRM,
784 L2CAP_MOVE_WAIT_CONFIRM_RSP,
785 L2CAP_MOVE_WAIT_LOGICAL_COMP,
786 L2CAP_MOVE_WAIT_LOGICAL_CFM,
787 L2CAP_MOVE_WAIT_LOCAL_BUSY,
788 L2CAP_MOVE_WAIT_PREPARE,
789 };
790
791 void l2cap_chan_hold(struct l2cap_chan *c);
792 void l2cap_chan_put(struct l2cap_chan *c);
793
794 static inline void l2cap_chan_lock(struct l2cap_chan *chan)
795 {
796 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting));
797 }
798
799 static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
800 {
801 mutex_unlock(&chan->lock);
802 }
803
804 static inline void l2cap_set_timer(struct l2cap_chan *chan,
805 struct delayed_work *work, long timeout)
806 {
807 BT_DBG("chan %p state %s timeout %ld", chan,
808 state_to_string(chan->state), timeout);
809
810 /* If delayed work cancelled do not hold(chan)
811 since it is already done with previous set_timer */
812 if (!cancel_delayed_work(work))
813 l2cap_chan_hold(chan);
814
815 schedule_delayed_work(work, timeout);
816 }
817
818 static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
819 struct delayed_work *work)
820 {
821 bool ret;
822
823 /* put(chan) if delayed work cancelled otherwise it
824 is done in delayed work function */
825 ret = cancel_delayed_work(work);
826 if (ret)
827 l2cap_chan_put(chan);
828
829 return ret;
830 }
831
832 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
833 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
834 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
835 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
836 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
837 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
838 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
839
840 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
841 {
842 if (seq1 >= seq2)
843 return seq1 - seq2;
844 else
845 return chan->tx_win_max + 1 - seq2 + seq1;
846 }
847
848 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
849 {
850 return (seq + 1) % (chan->tx_win_max + 1);
851 }
852
853 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
854 {
855 return NULL;
856 }
857
858 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb)
859 {
860 return -ENOSYS;
861 }
862
863 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan,
864 unsigned long hdr_len,
865 unsigned long len, int nb)
866 {
867 return ERR_PTR(-ENOSYS);
868 }
869
870 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
871 {
872 }
873
874 static inline void l2cap_chan_no_close(struct l2cap_chan *chan)
875 {
876 }
877
878 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
879 {
880 }
881
882 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan,
883 int state, int err)
884 {
885 }
886
887 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
888 {
889 }
890
891 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan)
892 {
893 }
894
895 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan)
896 {
897 }
898
899 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan)
900 {
901 }
902
903 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
904 {
905 return 0;
906 }
907
908 static inline int l2cap_chan_no_memcpy_fromiovec(struct l2cap_chan *chan,
909 unsigned char *kdata,
910 struct iovec *iov,
911 int len)
912 {
913 /* Following is safe since for compiler definitions of kvec and
914 * iovec are identical, yielding the same in-core layout and alignment
915 */
916 struct kvec *vec = (struct kvec *)iov;
917
918 while (len > 0) {
919 if (vec->iov_len) {
920 int copy = min_t(unsigned int, len, vec->iov_len);
921 memcpy(kdata, vec->iov_base, copy);
922 len -= copy;
923 kdata += copy;
924 vec->iov_base += copy;
925 vec->iov_len -= copy;
926 }
927 vec++;
928 }
929
930 return 0;
931 }
932
933 extern bool disable_ertm;
934
935 int l2cap_init_sockets(void);
936 void l2cap_cleanup_sockets(void);
937 bool l2cap_is_socket(struct socket *sock);
938
939 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan);
940 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
941
942 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
943 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
944
945 struct l2cap_chan *l2cap_chan_create(void);
946 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
947 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
948 bdaddr_t *dst, u8 dst_type);
949 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len);
950 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
951 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator);
952 void l2cap_chan_set_defaults(struct l2cap_chan *chan);
953 int l2cap_ertm_init(struct l2cap_chan *chan);
954 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
955 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
956 void l2cap_chan_del(struct l2cap_chan *chan, int err);
957 void l2cap_send_conn_req(struct l2cap_chan *chan);
958 void l2cap_move_start(struct l2cap_chan *chan);
959 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
960 u8 status);
961 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
962
963 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn);
964 void l2cap_conn_put(struct l2cap_conn *conn);
965
966 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user);
967 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user);
968
969 #endif /* __L2CAP_H */
Linux kernel - Deliverables
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