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 #include <linux/android_kabi.h>
33
34 /* L2CAP defaults */
35 #define L2CAP_DEFAULT_MTU 672
36 #define L2CAP_DEFAULT_MIN_MTU 48
37 #define L2CAP_DEFAULT_FLUSH_TO 0xFFFF
38 #define L2CAP_EFS_DEFAULT_FLUSH_TO 0xFFFFFFFF
39 #define L2CAP_DEFAULT_TX_WINDOW 63
40 #define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF
41 #define L2CAP_DEFAULT_MAX_TX 3
42 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */
43 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
44 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1492 /* Sized for AMP packet */
45 #define L2CAP_DEFAULT_ACK_TO 200
46 #define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF
47 #define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF
48 #define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF
49 #define L2CAP_BREDR_MAX_PAYLOAD 1019 /* 3-DH5 packet */
50 #define L2CAP_LE_MIN_MTU 23
51 #define L2CAP_ECRED_CONN_SCID_MAX 5
52
53 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100)
54 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000)
55 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000)
56 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000)
57 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000)
58 #define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000)
59 #define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000)
60 #define L2CAP_WAIT_ACK_POLL_PERIOD msecs_to_jiffies(200)
61 #define L2CAP_WAIT_ACK_TIMEOUT msecs_to_jiffies(10000)
62
63 #define L2CAP_A2MP_DEFAULT_MTU 670
64
65 /* L2CAP socket address */
66 struct sockaddr_l2 {
67 sa_family_t l2_family;
68 __le16 l2_psm;
69 bdaddr_t l2_bdaddr;
70 __le16 l2_cid;
71 __u8 l2_bdaddr_type;
72 };
73
74 /* L2CAP socket options */
75 #define L2CAP_OPTIONS 0x01
76 struct l2cap_options {
77 __u16 omtu;
78 __u16 imtu;
79 __u16 flush_to;
80 __u8 mode;
81 __u8 fcs;
82 __u8 max_tx;
83 __u16 txwin_size;
84 };
85
86 #define L2CAP_CONNINFO 0x02
87 struct l2cap_conninfo {
88 __u16 hci_handle;
89 __u8 dev_class[3];
90 };
91
92 #define L2CAP_LM 0x03
93 #define L2CAP_LM_MASTER 0x0001
94 #define L2CAP_LM_AUTH 0x0002
95 #define L2CAP_LM_ENCRYPT 0x0004
96 #define L2CAP_LM_TRUSTED 0x0008
97 #define L2CAP_LM_RELIABLE 0x0010
98 #define L2CAP_LM_SECURE 0x0020
99 #define L2CAP_LM_FIPS 0x0040
100
101 /* L2CAP command codes */
102 #define L2CAP_COMMAND_REJ 0x01
103 #define L2CAP_CONN_REQ 0x02
104 #define L2CAP_CONN_RSP 0x03
105 #define L2CAP_CONF_REQ 0x04
106 #define L2CAP_CONF_RSP 0x05
107 #define L2CAP_DISCONN_REQ 0x06
108 #define L2CAP_DISCONN_RSP 0x07
109 #define L2CAP_ECHO_REQ 0x08
110 #define L2CAP_ECHO_RSP 0x09
111 #define L2CAP_INFO_REQ 0x0a
112 #define L2CAP_INFO_RSP 0x0b
113 #define L2CAP_CREATE_CHAN_REQ 0x0c
114 #define L2CAP_CREATE_CHAN_RSP 0x0d
115 #define L2CAP_MOVE_CHAN_REQ 0x0e
116 #define L2CAP_MOVE_CHAN_RSP 0x0f
117 #define L2CAP_MOVE_CHAN_CFM 0x10
118 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11
119 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
120 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
121 #define L2CAP_LE_CONN_REQ 0x14
122 #define L2CAP_LE_CONN_RSP 0x15
123 #define L2CAP_LE_CREDITS 0x16
124 #define L2CAP_ECRED_CONN_REQ 0x17
125 #define L2CAP_ECRED_CONN_RSP 0x18
126 #define L2CAP_ECRED_RECONF_REQ 0x19
127 #define L2CAP_ECRED_RECONF_RSP 0x1a
128
129 /* L2CAP extended feature mask */
130 #define L2CAP_FEAT_FLOWCTL 0x00000001
131 #define L2CAP_FEAT_RETRANS 0x00000002
132 #define L2CAP_FEAT_BIDIR_QOS 0x00000004
133 #define L2CAP_FEAT_ERTM 0x00000008
134 #define L2CAP_FEAT_STREAMING 0x00000010
135 #define L2CAP_FEAT_FCS 0x00000020
136 #define L2CAP_FEAT_EXT_FLOW 0x00000040
137 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
138 #define L2CAP_FEAT_EXT_WINDOW 0x00000100
139 #define L2CAP_FEAT_UCD 0x00000200
140
141 /* L2CAP checksum option */
142 #define L2CAP_FCS_NONE 0x00
143 #define L2CAP_FCS_CRC16 0x01
144
145 /* L2CAP fixed channels */
146 #define L2CAP_FC_SIG_BREDR 0x02
147 #define L2CAP_FC_CONNLESS 0x04
148 #define L2CAP_FC_A2MP 0x08
149 #define L2CAP_FC_ATT 0x10
150 #define L2CAP_FC_SIG_LE 0x20
151 #define L2CAP_FC_SMP_LE 0x40
152 #define L2CAP_FC_SMP_BREDR 0x80
153
154 /* L2CAP Control Field bit masks */
155 #define L2CAP_CTRL_SAR 0xC000
156 #define L2CAP_CTRL_REQSEQ 0x3F00
157 #define L2CAP_CTRL_TXSEQ 0x007E
158 #define L2CAP_CTRL_SUPERVISE 0x000C
159
160 #define L2CAP_CTRL_RETRANS 0x0080
161 #define L2CAP_CTRL_FINAL 0x0080
162 #define L2CAP_CTRL_POLL 0x0010
163 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
164
165 #define L2CAP_CTRL_TXSEQ_SHIFT 1
166 #define L2CAP_CTRL_SUPER_SHIFT 2
167 #define L2CAP_CTRL_POLL_SHIFT 4
168 #define L2CAP_CTRL_FINAL_SHIFT 7
169 #define L2CAP_CTRL_REQSEQ_SHIFT 8
170 #define L2CAP_CTRL_SAR_SHIFT 14
171
172 /* L2CAP Extended Control Field bit mask */
173 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
174 #define L2CAP_EXT_CTRL_SAR 0x00030000
175 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
176 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
177
178 #define L2CAP_EXT_CTRL_POLL 0x00040000
179 #define L2CAP_EXT_CTRL_FINAL 0x00000002
180 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
181
182 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1
183 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
184 #define L2CAP_EXT_CTRL_SAR_SHIFT 16
185 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16
186 #define L2CAP_EXT_CTRL_POLL_SHIFT 18
187 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
188
189 /* L2CAP Supervisory Function */
190 #define L2CAP_SUPER_RR 0x00
191 #define L2CAP_SUPER_REJ 0x01
192 #define L2CAP_SUPER_RNR 0x02
193 #define L2CAP_SUPER_SREJ 0x03
194
195 /* L2CAP Segmentation and Reassembly */
196 #define L2CAP_SAR_UNSEGMENTED 0x00
197 #define L2CAP_SAR_START 0x01
198 #define L2CAP_SAR_END 0x02
199 #define L2CAP_SAR_CONTINUE 0x03
200
201 /* L2CAP Command rej. reasons */
202 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
203 #define L2CAP_REJ_MTU_EXCEEDED 0x0001
204 #define L2CAP_REJ_INVALID_CID 0x0002
205
206 /* L2CAP structures */
207 struct l2cap_hdr {
208 __le16 len;
209 __le16 cid;
210 } __packed;
211 #define L2CAP_LEN_SIZE 2
212 #define L2CAP_HDR_SIZE 4
213 #define L2CAP_ENH_HDR_SIZE 6
214 #define L2CAP_EXT_HDR_SIZE 8
215
216 #define L2CAP_FCS_SIZE 2
217 #define L2CAP_SDULEN_SIZE 2
218 #define L2CAP_PSMLEN_SIZE 2
219 #define L2CAP_ENH_CTRL_SIZE 2
220 #define L2CAP_EXT_CTRL_SIZE 4
221
222 struct l2cap_cmd_hdr {
223 __u8 code;
224 __u8 ident;
225 __le16 len;
226 } __packed;
227 #define L2CAP_CMD_HDR_SIZE 4
228
229 struct l2cap_cmd_rej_unk {
230 __le16 reason;
231 } __packed;
232
233 struct l2cap_cmd_rej_mtu {
234 __le16 reason;
235 __le16 max_mtu;
236 } __packed;
237
238 struct l2cap_cmd_rej_cid {
239 __le16 reason;
240 __le16 scid;
241 __le16 dcid;
242 } __packed;
243
244 struct l2cap_conn_req {
245 __le16 psm;
246 __le16 scid;
247 } __packed;
248
249 struct l2cap_conn_rsp {
250 __le16 dcid;
251 __le16 scid;
252 __le16 result;
253 __le16 status;
254 } __packed;
255
256 /* protocol/service multiplexer (PSM) */
257 #define L2CAP_PSM_SDP 0x0001
258 #define L2CAP_PSM_RFCOMM 0x0003
259 #define L2CAP_PSM_3DSP 0x0021
260 #define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */
261
262 #define L2CAP_PSM_DYN_START 0x1001
263 #define L2CAP_PSM_DYN_END 0xffff
264 #define L2CAP_PSM_AUTO_END 0x10ff
265 #define L2CAP_PSM_LE_DYN_START 0x0080
266 #define L2CAP_PSM_LE_DYN_END 0x00ff
267
268 /* channel identifier */
269 #define L2CAP_CID_SIGNALING 0x0001
270 #define L2CAP_CID_CONN_LESS 0x0002
271 #define L2CAP_CID_A2MP 0x0003
272 #define L2CAP_CID_ATT 0x0004
273 #define L2CAP_CID_LE_SIGNALING 0x0005
274 #define L2CAP_CID_SMP 0x0006
275 #define L2CAP_CID_SMP_BREDR 0x0007
276 #define L2CAP_CID_DYN_START 0x0040
277 #define L2CAP_CID_DYN_END 0xffff
278 #define L2CAP_CID_LE_DYN_END 0x007f
279
280 /* connect/create channel results */
281 #define L2CAP_CR_SUCCESS 0x0000
282 #define L2CAP_CR_PEND 0x0001
283 #define L2CAP_CR_BAD_PSM 0x0002
284 #define L2CAP_CR_SEC_BLOCK 0x0003
285 #define L2CAP_CR_NO_MEM 0x0004
286 #define L2CAP_CR_BAD_AMP 0x0005
287 #define L2CAP_CR_INVALID_SCID 0x0006
288 #define L2CAP_CR_SCID_IN_USE 0x0007
289
290 /* credit based connect results */
291 #define L2CAP_CR_LE_SUCCESS 0x0000
292 #define L2CAP_CR_LE_BAD_PSM 0x0002
293 #define L2CAP_CR_LE_NO_MEM 0x0004
294 #define L2CAP_CR_LE_AUTHENTICATION 0x0005
295 #define L2CAP_CR_LE_AUTHORIZATION 0x0006
296 #define L2CAP_CR_LE_BAD_KEY_SIZE 0x0007
297 #define L2CAP_CR_LE_ENCRYPTION 0x0008
298 #define L2CAP_CR_LE_INVALID_SCID 0x0009
299 #define L2CAP_CR_LE_SCID_IN_USE 0X000A
300 #define L2CAP_CR_LE_UNACCEPT_PARAMS 0X000B
301 #define L2CAP_CR_LE_INVALID_PARAMS 0X000C
302
303 /* connect/create channel status */
304 #define L2CAP_CS_NO_INFO 0x0000
305 #define L2CAP_CS_AUTHEN_PEND 0x0001
306 #define L2CAP_CS_AUTHOR_PEND 0x0002
307
308 struct l2cap_conf_req {
309 __le16 dcid;
310 __le16 flags;
311 __u8 data[];
312 } __packed;
313
314 struct l2cap_conf_rsp {
315 __le16 scid;
316 __le16 flags;
317 __le16 result;
318 __u8 data[];
319 } __packed;
320
321 #define L2CAP_CONF_SUCCESS 0x0000
322 #define L2CAP_CONF_UNACCEPT 0x0001
323 #define L2CAP_CONF_REJECT 0x0002
324 #define L2CAP_CONF_UNKNOWN 0x0003
325 #define L2CAP_CONF_PENDING 0x0004
326 #define L2CAP_CONF_EFS_REJECT 0x0005
327
328 /* configuration req/rsp continuation flag */
329 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001
330
331 struct l2cap_conf_opt {
332 __u8 type;
333 __u8 len;
334 __u8 val[];
335 } __packed;
336 #define L2CAP_CONF_OPT_SIZE 2
337
338 #define L2CAP_CONF_HINT 0x80
339 #define L2CAP_CONF_MASK 0x7f
340
341 #define L2CAP_CONF_MTU 0x01
342 #define L2CAP_CONF_FLUSH_TO 0x02
343 #define L2CAP_CONF_QOS 0x03
344 #define L2CAP_CONF_RFC 0x04
345 #define L2CAP_CONF_FCS 0x05
346 #define L2CAP_CONF_EFS 0x06
347 #define L2CAP_CONF_EWS 0x07
348
349 #define L2CAP_CONF_MAX_SIZE 22
350
351 struct l2cap_conf_rfc {
352 __u8 mode;
353 __u8 txwin_size;
354 __u8 max_transmit;
355 __le16 retrans_timeout;
356 __le16 monitor_timeout;
357 __le16 max_pdu_size;
358 } __packed;
359
360 #define L2CAP_MODE_BASIC 0x00
361 #define L2CAP_MODE_RETRANS 0x01
362 #define L2CAP_MODE_FLOWCTL 0x02
363 #define L2CAP_MODE_ERTM 0x03
364 #define L2CAP_MODE_STREAMING 0x04
365
366 /* Unlike the above this one doesn't actually map to anything that would
367 * ever be sent over the air. Therefore, use a value that's unlikely to
368 * ever be used in the BR/EDR configuration phase.
369 */
370 #define L2CAP_MODE_LE_FLOWCTL 0x80
371 #define L2CAP_MODE_EXT_FLOWCTL 0x81
372
373 struct l2cap_conf_efs {
374 __u8 id;
375 __u8 stype;
376 __le16 msdu;
377 __le32 sdu_itime;
378 __le32 acc_lat;
379 __le32 flush_to;
380 } __packed;
381
382 #define L2CAP_SERV_NOTRAFIC 0x00
383 #define L2CAP_SERV_BESTEFFORT 0x01
384 #define L2CAP_SERV_GUARANTEED 0x02
385
386 #define L2CAP_BESTEFFORT_ID 0x01
387
388 struct l2cap_disconn_req {
389 __le16 dcid;
390 __le16 scid;
391 } __packed;
392
393 struct l2cap_disconn_rsp {
394 __le16 dcid;
395 __le16 scid;
396 } __packed;
397
398 struct l2cap_info_req {
399 __le16 type;
400 } __packed;
401
402 struct l2cap_info_rsp {
403 __le16 type;
404 __le16 result;
405 __u8 data[];
406 } __packed;
407
408 struct l2cap_create_chan_req {
409 __le16 psm;
410 __le16 scid;
411 __u8 amp_id;
412 } __packed;
413
414 struct l2cap_create_chan_rsp {
415 __le16 dcid;
416 __le16 scid;
417 __le16 result;
418 __le16 status;
419 } __packed;
420
421 struct l2cap_move_chan_req {
422 __le16 icid;
423 __u8 dest_amp_id;
424 } __packed;
425
426 struct l2cap_move_chan_rsp {
427 __le16 icid;
428 __le16 result;
429 } __packed;
430
431 #define L2CAP_MR_SUCCESS 0x0000
432 #define L2CAP_MR_PEND 0x0001
433 #define L2CAP_MR_BAD_ID 0x0002
434 #define L2CAP_MR_SAME_ID 0x0003
435 #define L2CAP_MR_NOT_SUPP 0x0004
436 #define L2CAP_MR_COLLISION 0x0005
437 #define L2CAP_MR_NOT_ALLOWED 0x0006
438
439 struct l2cap_move_chan_cfm {
440 __le16 icid;
441 __le16 result;
442 } __packed;
443
444 #define L2CAP_MC_CONFIRMED 0x0000
445 #define L2CAP_MC_UNCONFIRMED 0x0001
446
447 struct l2cap_move_chan_cfm_rsp {
448 __le16 icid;
449 } __packed;
450
451 /* info type */
452 #define L2CAP_IT_CL_MTU 0x0001
453 #define L2CAP_IT_FEAT_MASK 0x0002
454 #define L2CAP_IT_FIXED_CHAN 0x0003
455
456 /* info result */
457 #define L2CAP_IR_SUCCESS 0x0000
458 #define L2CAP_IR_NOTSUPP 0x0001
459
460 struct l2cap_conn_param_update_req {
461 __le16 min;
462 __le16 max;
463 __le16 latency;
464 __le16 to_multiplier;
465 } __packed;
466
467 struct l2cap_conn_param_update_rsp {
468 __le16 result;
469 } __packed;
470
471 /* Connection Parameters result */
472 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000
473 #define L2CAP_CONN_PARAM_REJECTED 0x0001
474
475 struct l2cap_le_conn_req {
476 __le16 psm;
477 __le16 scid;
478 __le16 mtu;
479 __le16 mps;
480 __le16 credits;
481 } __packed;
482
483 struct l2cap_le_conn_rsp {
484 __le16 dcid;
485 __le16 mtu;
486 __le16 mps;
487 __le16 credits;
488 __le16 result;
489 } __packed;
490
491 struct l2cap_le_credits {
492 __le16 cid;
493 __le16 credits;
494 } __packed;
495
496 #define L2CAP_ECRED_MIN_MTU 64
497 #define L2CAP_ECRED_MIN_MPS 64
498 #define L2CAP_ECRED_MAX_CID 5
499
500 struct l2cap_ecred_conn_req {
501 __le16 psm;
502 __le16 mtu;
503 __le16 mps;
504 __le16 credits;
505 __le16 scid[];
506 } __packed;
507
508 struct l2cap_ecred_conn_rsp {
509 __le16 mtu;
510 __le16 mps;
511 __le16 credits;
512 __le16 result;
513 __le16 dcid[];
514 };
515
516 struct l2cap_ecred_reconf_req {
517 __le16 mtu;
518 __le16 mps;
519 __le16 scid[];
520 } __packed;
521
522 #define L2CAP_RECONF_SUCCESS 0x0000
523 #define L2CAP_RECONF_INVALID_MTU 0x0001
524 #define L2CAP_RECONF_INVALID_MPS 0x0002
525
526 struct l2cap_ecred_reconf_rsp {
527 __le16 result;
528 } __packed;
529
530 /* ----- L2CAP channels and connections ----- */
531 struct l2cap_seq_list {
532 __u16 head;
533 __u16 tail;
534 __u16 mask;
535 __u16 *list;
536 };
537
538 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF
539 #define L2CAP_SEQ_LIST_TAIL 0x8000
540
541 struct l2cap_chan {
542 struct l2cap_conn *conn;
543 struct hci_conn *hs_hcon;
544 struct hci_chan *hs_hchan;
545 struct kref kref;
546 atomic_t nesting;
547
548 __u8 state;
549
550 bdaddr_t dst;
551 __u8 dst_type;
552 bdaddr_t src;
553 __u8 src_type;
554 __le16 psm;
555 __le16 sport;
556 __u16 dcid;
557 __u16 scid;
558
559 __u16 imtu;
560 __u16 omtu;
561 __u16 flush_to;
562 __u8 mode;
563 __u8 chan_type;
564 __u8 chan_policy;
565
566 __u8 sec_level;
567
568 __u8 ident;
569
570 __u8 conf_req[64];
571 __u8 conf_len;
572 __u8 num_conf_req;
573 __u8 num_conf_rsp;
574
575 __u8 fcs;
576
577 __u16 tx_win;
578 __u16 tx_win_max;
579 __u16 ack_win;
580 __u8 max_tx;
581 __u16 retrans_timeout;
582 __u16 monitor_timeout;
583 __u16 mps;
584
585 __u16 tx_credits;
586 __u16 rx_credits;
587
588 __u8 tx_state;
589 __u8 rx_state;
590
591 unsigned long conf_state;
592 unsigned long conn_state;
593 unsigned long flags;
594
595 __u8 remote_amp_id;
596 __u8 local_amp_id;
597 __u8 move_id;
598 __u8 move_state;
599 __u8 move_role;
600
601 __u16 next_tx_seq;
602 __u16 expected_ack_seq;
603 __u16 expected_tx_seq;
604 __u16 buffer_seq;
605 __u16 srej_save_reqseq;
606 __u16 last_acked_seq;
607 __u16 frames_sent;
608 __u16 unacked_frames;
609 __u8 retry_count;
610 __u16 sdu_len;
611 struct sk_buff *sdu;
612 struct sk_buff *sdu_last_frag;
613
614 __u16 remote_tx_win;
615 __u8 remote_max_tx;
616 __u16 remote_mps;
617
618 __u8 local_id;
619 __u8 local_stype;
620 __u16 local_msdu;
621 __u32 local_sdu_itime;
622 __u32 local_acc_lat;
623 __u32 local_flush_to;
624
625 __u8 remote_id;
626 __u8 remote_stype;
627 __u16 remote_msdu;
628 __u32 remote_sdu_itime;
629 __u32 remote_acc_lat;
630 __u32 remote_flush_to;
631
632 struct delayed_work chan_timer;
633 struct delayed_work retrans_timer;
634 struct delayed_work monitor_timer;
635 struct delayed_work ack_timer;
636
637 struct sk_buff *tx_send_head;
638 struct sk_buff_head tx_q;
639 struct sk_buff_head srej_q;
640 struct l2cap_seq_list srej_list;
641 struct l2cap_seq_list retrans_list;
642
643 struct list_head list;
644 struct list_head global_l;
645
646 void *data;
647 const struct l2cap_ops *ops;
648 struct mutex lock;
649
650 ANDROID_KABI_RESERVE(1);
651 ANDROID_KABI_RESERVE(2);
652 };
653
654 struct l2cap_ops {
655 char *name;
656
657 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan);
658 int (*recv) (struct l2cap_chan * chan,
659 struct sk_buff *skb);
660 void (*teardown) (struct l2cap_chan *chan, int err);
661 void (*close) (struct l2cap_chan *chan);
662 void (*state_change) (struct l2cap_chan *chan,
663 int state, int err);
664 void (*ready) (struct l2cap_chan *chan);
665 void (*defer) (struct l2cap_chan *chan);
666 void (*resume) (struct l2cap_chan *chan);
667 void (*suspend) (struct l2cap_chan *chan);
668 void (*set_shutdown) (struct l2cap_chan *chan);
669 long (*get_sndtimeo) (struct l2cap_chan *chan);
670 struct pid *(*get_peer_pid) (struct l2cap_chan *chan);
671 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
672 unsigned long hdr_len,
673 unsigned long len, int nb);
674 int (*filter) (struct l2cap_chan * chan,
675 struct sk_buff *skb);
676
677 ANDROID_KABI_RESERVE(1);
678 ANDROID_KABI_RESERVE(2);
679 };
680
681 struct l2cap_conn {
682 struct hci_conn *hcon;
683 struct hci_chan *hchan;
684
685 unsigned int mtu;
686
687 __u32 feat_mask;
688 __u8 remote_fixed_chan;
689 __u8 local_fixed_chan;
690
691 __u8 info_state;
692 __u8 info_ident;
693
694 struct delayed_work info_timer;
695
696 struct sk_buff *rx_skb;
697 __u32 rx_len;
698 __u8 tx_ident;
699 struct mutex ident_lock;
700
701 struct sk_buff_head pending_rx;
702 struct work_struct pending_rx_work;
703
704 struct work_struct id_addr_update_work;
705
706 __u8 disc_reason;
707
708 struct l2cap_chan *smp;
709
710 struct list_head chan_l;
711 struct mutex chan_lock;
712 struct kref ref;
713 struct list_head users;
714
715 ANDROID_KABI_RESERVE(1);
716 ANDROID_KABI_RESERVE(2);
717 };
718
719 struct l2cap_user {
720 struct list_head list;
721 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user);
722 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user);
723 };
724
725 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
726 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
727 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
728
729 #define L2CAP_CHAN_RAW 1
730 #define L2CAP_CHAN_CONN_LESS 2
731 #define L2CAP_CHAN_CONN_ORIENTED 3
732 #define L2CAP_CHAN_FIXED 4
733
734 /* ----- L2CAP socket info ----- */
735 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
736
737 struct l2cap_pinfo {
738 struct bt_sock bt;
739 struct l2cap_chan *chan;
740 struct sk_buff *rx_busy_skb;
741 };
742
743 enum {
744 CONF_REQ_SENT,
745 CONF_INPUT_DONE,
746 CONF_OUTPUT_DONE,
747 CONF_MTU_DONE,
748 CONF_MODE_DONE,
749 CONF_CONNECT_PEND,
750 CONF_RECV_NO_FCS,
751 CONF_STATE2_DEVICE,
752 CONF_EWS_RECV,
753 CONF_LOC_CONF_PEND,
754 CONF_REM_CONF_PEND,
755 CONF_NOT_COMPLETE,
756 };
757
758 #define L2CAP_CONF_MAX_CONF_REQ 2
759 #define L2CAP_CONF_MAX_CONF_RSP 2
760
761 enum {
762 CONN_SREJ_SENT,
763 CONN_WAIT_F,
764 CONN_SREJ_ACT,
765 CONN_SEND_PBIT,
766 CONN_REMOTE_BUSY,
767 CONN_LOCAL_BUSY,
768 CONN_REJ_ACT,
769 CONN_SEND_FBIT,
770 CONN_RNR_SENT,
771 };
772
773 /* Definitions for flags in l2cap_chan */
774 enum {
775 FLAG_ROLE_SWITCH,
776 FLAG_FORCE_ACTIVE,
777 FLAG_FORCE_RELIABLE,
778 FLAG_FLUSHABLE,
779 FLAG_EXT_CTRL,
780 FLAG_EFS_ENABLE,
781 FLAG_DEFER_SETUP,
782 FLAG_LE_CONN_REQ_SENT,
783 FLAG_ECRED_CONN_REQ_SENT,
784 FLAG_PENDING_SECURITY,
785 FLAG_HOLD_HCI_CONN,
786 };
787
788 /* Lock nesting levels for L2CAP channels. We need these because lockdep
789 * otherwise considers all channels equal and will e.g. complain about a
790 * connection oriented channel triggering SMP procedures or a listening
791 * channel creating and locking a child channel.
792 */
793 enum {
794 L2CAP_NESTING_SMP,
795 L2CAP_NESTING_NORMAL,
796 L2CAP_NESTING_PARENT,
797 };
798
799 enum {
800 L2CAP_TX_STATE_XMIT,
801 L2CAP_TX_STATE_WAIT_F,
802 };
803
804 enum {
805 L2CAP_RX_STATE_RECV,
806 L2CAP_RX_STATE_SREJ_SENT,
807 L2CAP_RX_STATE_MOVE,
808 L2CAP_RX_STATE_WAIT_P,
809 L2CAP_RX_STATE_WAIT_F,
810 };
811
812 enum {
813 L2CAP_TXSEQ_EXPECTED,
814 L2CAP_TXSEQ_EXPECTED_SREJ,
815 L2CAP_TXSEQ_UNEXPECTED,
816 L2CAP_TXSEQ_UNEXPECTED_SREJ,
817 L2CAP_TXSEQ_DUPLICATE,
818 L2CAP_TXSEQ_DUPLICATE_SREJ,
819 L2CAP_TXSEQ_INVALID,
820 L2CAP_TXSEQ_INVALID_IGNORE,
821 };
822
823 enum {
824 L2CAP_EV_DATA_REQUEST,
825 L2CAP_EV_LOCAL_BUSY_DETECTED,
826 L2CAP_EV_LOCAL_BUSY_CLEAR,
827 L2CAP_EV_RECV_REQSEQ_AND_FBIT,
828 L2CAP_EV_RECV_FBIT,
829 L2CAP_EV_RETRANS_TO,
830 L2CAP_EV_MONITOR_TO,
831 L2CAP_EV_EXPLICIT_POLL,
832 L2CAP_EV_RECV_IFRAME,
833 L2CAP_EV_RECV_RR,
834 L2CAP_EV_RECV_REJ,
835 L2CAP_EV_RECV_RNR,
836 L2CAP_EV_RECV_SREJ,
837 L2CAP_EV_RECV_FRAME,
838 };
839
840 enum {
841 L2CAP_MOVE_ROLE_NONE,
842 L2CAP_MOVE_ROLE_INITIATOR,
843 L2CAP_MOVE_ROLE_RESPONDER,
844 };
845
846 enum {
847 L2CAP_MOVE_STABLE,
848 L2CAP_MOVE_WAIT_REQ,
849 L2CAP_MOVE_WAIT_RSP,
850 L2CAP_MOVE_WAIT_RSP_SUCCESS,
851 L2CAP_MOVE_WAIT_CONFIRM,
852 L2CAP_MOVE_WAIT_CONFIRM_RSP,
853 L2CAP_MOVE_WAIT_LOGICAL_COMP,
854 L2CAP_MOVE_WAIT_LOGICAL_CFM,
855 L2CAP_MOVE_WAIT_LOCAL_BUSY,
856 L2CAP_MOVE_WAIT_PREPARE,
857 };
858
859 void l2cap_chan_hold(struct l2cap_chan *c);
860 struct l2cap_chan *l2cap_chan_hold_unless_zero(struct l2cap_chan *c);
861 void l2cap_chan_put(struct l2cap_chan *c);
862
l2cap_chan_lock(struct l2cap_chan * chan)863 static inline void l2cap_chan_lock(struct l2cap_chan *chan)
864 {
865 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting));
866 }
867
l2cap_chan_unlock(struct l2cap_chan * chan)868 static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
869 {
870 mutex_unlock(&chan->lock);
871 }
872
l2cap_set_timer(struct l2cap_chan * chan,struct delayed_work * work,long timeout)873 static inline void l2cap_set_timer(struct l2cap_chan *chan,
874 struct delayed_work *work, long timeout)
875 {
876 BT_DBG("chan %p state %s timeout %ld", chan,
877 state_to_string(chan->state), timeout);
878
879 /* If delayed work cancelled do not hold(chan)
880 since it is already done with previous set_timer */
881 if (!cancel_delayed_work(work))
882 l2cap_chan_hold(chan);
883
884 schedule_delayed_work(work, timeout);
885 }
886
l2cap_clear_timer(struct l2cap_chan * chan,struct delayed_work * work)887 static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
888 struct delayed_work *work)
889 {
890 bool ret;
891
892 /* put(chan) if delayed work cancelled otherwise it
893 is done in delayed work function */
894 ret = cancel_delayed_work(work);
895 if (ret)
896 l2cap_chan_put(chan);
897
898 return ret;
899 }
900
901 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
902 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
903 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
904 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
905 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
906 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
907 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
908
__seq_offset(struct l2cap_chan * chan,__u16 seq1,__u16 seq2)909 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
910 {
911 if (seq1 >= seq2)
912 return seq1 - seq2;
913 else
914 return chan->tx_win_max + 1 - seq2 + seq1;
915 }
916
__next_seq(struct l2cap_chan * chan,__u16 seq)917 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
918 {
919 return (seq + 1) % (chan->tx_win_max + 1);
920 }
921
l2cap_chan_no_new_connection(struct l2cap_chan * chan)922 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
923 {
924 return NULL;
925 }
926
l2cap_chan_no_recv(struct l2cap_chan * chan,struct sk_buff * skb)927 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb)
928 {
929 return -ENOSYS;
930 }
931
l2cap_chan_no_alloc_skb(struct l2cap_chan * chan,unsigned long hdr_len,unsigned long len,int nb)932 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan,
933 unsigned long hdr_len,
934 unsigned long len, int nb)
935 {
936 return ERR_PTR(-ENOSYS);
937 }
938
l2cap_chan_no_teardown(struct l2cap_chan * chan,int err)939 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
940 {
941 }
942
l2cap_chan_no_close(struct l2cap_chan * chan)943 static inline void l2cap_chan_no_close(struct l2cap_chan *chan)
944 {
945 }
946
l2cap_chan_no_ready(struct l2cap_chan * chan)947 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
948 {
949 }
950
l2cap_chan_no_state_change(struct l2cap_chan * chan,int state,int err)951 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan,
952 int state, int err)
953 {
954 }
955
l2cap_chan_no_defer(struct l2cap_chan * chan)956 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
957 {
958 }
959
l2cap_chan_no_suspend(struct l2cap_chan * chan)960 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan)
961 {
962 }
963
l2cap_chan_no_resume(struct l2cap_chan * chan)964 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan)
965 {
966 }
967
l2cap_chan_no_set_shutdown(struct l2cap_chan * chan)968 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan)
969 {
970 }
971
l2cap_chan_no_get_sndtimeo(struct l2cap_chan * chan)972 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
973 {
974 return 0;
975 }
976
977 extern bool disable_ertm;
978 extern bool enable_ecred;
979
980 int l2cap_init_sockets(void);
981 void l2cap_cleanup_sockets(void);
982 bool l2cap_is_socket(struct socket *sock);
983
984 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan);
985 void __l2cap_ecred_conn_rsp_defer(struct l2cap_chan *chan);
986 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
987
988 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
989 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
990
991 struct l2cap_chan *l2cap_chan_create(void);
992 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
993 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
994 bdaddr_t *dst, u8 dst_type);
995 int l2cap_chan_reconfigure(struct l2cap_chan *chan, __u16 mtu);
996 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len);
997 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
998 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator);
999 void l2cap_chan_set_defaults(struct l2cap_chan *chan);
1000 int l2cap_ertm_init(struct l2cap_chan *chan);
1001 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
1002 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
1003 typedef void (*l2cap_chan_func_t)(struct l2cap_chan *chan, void *data);
1004 void l2cap_chan_list(struct l2cap_conn *conn, l2cap_chan_func_t func,
1005 void *data);
1006 void l2cap_chan_del(struct l2cap_chan *chan, int err);
1007 void l2cap_send_conn_req(struct l2cap_chan *chan);
1008 void l2cap_move_start(struct l2cap_chan *chan);
1009 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
1010 u8 status);
1011 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
1012
1013 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn);
1014 void l2cap_conn_put(struct l2cap_conn *conn);
1015
1016 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user);
1017 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user);
1018
1019 #endif /* __L2CAP_H */
1020