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Bluetooth: Fix deadlocks with sock lock and L2CAP timers locks
[deliverable/linux.git] / include / net / bluetooth / l2cap.h
CommitLineData
be21871f 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
ce5706bd 4 Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
5d8868ff 5 Copyright (C) 2010 Google Inc.
1da177e4
LT		 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
be21871f
AE		 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
1da177e4
LT		 20 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21
be21871f
AE		 22 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
23 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 24 SOFTWARE IS DISCLAIMED.
25*/
26
27#ifndef __L2CAP_H
28#define __L2CAP_H
29
88843ab0
AE		 30#include <asm/unaligned.h>
31
1da177e4 32/* L2CAP defaults */
47ec1dcd 33#define L2CAP_DEFAULT_MTU 672
f2fcfcd6 34#define L2CAP_DEFAULT_MIN_MTU 48
47ec1dcd 35#define L2CAP_DEFAULT_FLUSH_TO 0xffff
1c2acffb 36#define L2CAP_DEFAULT_TX_WINDOW 63
6327eb98 37#define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF
e90bac06 38#define L2CAP_DEFAULT_MAX_TX 3
fa235562 39#define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */
e90bac06 40#define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
db12d647 41#define L2CAP_DEFAULT_MAX_PDU_SIZE 1009 /* Sized for 3-DH5 packet */
c1b4f43b 42#define L2CAP_DEFAULT_ACK_TO 200
b62f328b 43#define L2CAP_LE_DEFAULT_MTU 23
8f7975b1
AE		 44#define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF
45#define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF
46#define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF
1da177e4 47
f3f668b0
AK		 48#define L2CAP_DISC_TIMEOUT (100)
49#define L2CAP_DISC_REJ_TIMEOUT (5000) /* 5 seconds */
50#define L2CAP_ENC_TIMEOUT (5000) /* 5 seconds */
51#define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */
52#define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */
1da177e4
LT		 53
54/* L2CAP socket address */
55struct sockaddr_l2 {
56 sa_family_t l2_family;
8e036fc3 57 __le16 l2_psm;
1da177e4 58 bdaddr_t l2_bdaddr;
f29972de 59 __le16 l2_cid;
1da177e4
LT		 60};
61
62/* L2CAP socket options */
63#define L2CAP_OPTIONS 0x01
64struct l2cap_options {
65 __u16 omtu;
66 __u16 imtu;
67 __u16 flush_to;
68 __u8 mode;
fcc203c3 69 __u8 fcs;
68d7f0ce 70 __u8 max_tx;
14b5aa71 71 __u16 txwin_size;
1da177e4
LT		 72};
73
74#define L2CAP_CONNINFO 0x02
75struct l2cap_conninfo {
76 __u16 hci_handle;
77 __u8 dev_class[3];
78};
79
80#define L2CAP_LM 0x03
81#define L2CAP_LM_MASTER 0x0001
82#define L2CAP_LM_AUTH 0x0002
83#define L2CAP_LM_ENCRYPT 0x0004
84#define L2CAP_LM_TRUSTED 0x0008
85#define L2CAP_LM_RELIABLE 0x0010
86#define L2CAP_LM_SECURE 0x0020
87
88/* L2CAP command codes */
47ec1dcd
MH		 89#define L2CAP_COMMAND_REJ 0x01
90#define L2CAP_CONN_REQ 0x02
91#define L2CAP_CONN_RSP 0x03
92#define L2CAP_CONF_REQ 0x04
93#define L2CAP_CONF_RSP 0x05
94#define L2CAP_DISCONN_REQ 0x06
95#define L2CAP_DISCONN_RSP 0x07
96#define L2CAP_ECHO_REQ 0x08
97#define L2CAP_ECHO_RSP 0x09
98#define L2CAP_INFO_REQ 0x0a
99#define L2CAP_INFO_RSP 0x0b
38094c75
MM		 100#define L2CAP_CREATE_CHAN_REQ 0x0c
101#define L2CAP_CREATE_CHAN_RSP 0x0d
102#define L2CAP_MOVE_CHAN_REQ 0x0e
103#define L2CAP_MOVE_CHAN_RSP 0x0f
104#define L2CAP_MOVE_CHAN_CFM 0x10
105#define L2CAP_MOVE_CHAN_CFM_RSP 0x11
3300d9a9
CT		 106#define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
107#define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
47ec1dcd 108
a858393b 109/* L2CAP extended feature mask */
47ec1dcd
MH		 110#define L2CAP_FEAT_FLOWCTL 0x00000001
111#define L2CAP_FEAT_RETRANS 0x00000002
a858393b 112#define L2CAP_FEAT_BIDIR_QOS 0x00000004
47ec1dcd
MH		 113#define L2CAP_FEAT_ERTM 0x00000008
114#define L2CAP_FEAT_STREAMING 0x00000010
115#define L2CAP_FEAT_FCS 0x00000020
a858393b 116#define L2CAP_FEAT_EXT_FLOW 0x00000040
47ec1dcd 117#define L2CAP_FEAT_FIXED_CHAN 0x00000080
a858393b
AE		 118#define L2CAP_FEAT_EXT_WINDOW 0x00000100
119#define L2CAP_FEAT_UCD 0x00000200
47ec1dcd
MH		 120
121/* L2CAP checksum option */
122#define L2CAP_FCS_NONE 0x00
123#define L2CAP_FCS_CRC16 0x01
1da177e4 124
d835ac0f
MM		 125/* L2CAP fixed channels */
126#define L2CAP_FC_L2CAP 0x02
127#define L2CAP_FC_A2MP 0x08
128
1c2acffb 129/* L2CAP Control Field bit masks */
57253fd8
AE		 130#define L2CAP_CTRL_SAR 0xC000
131#define L2CAP_CTRL_REQSEQ 0x3F00
132#define L2CAP_CTRL_TXSEQ 0x007E
133#define L2CAP_CTRL_SUPERVISE 0x000C
134
135#define L2CAP_CTRL_RETRANS 0x0080
136#define L2CAP_CTRL_FINAL 0x0080
137#define L2CAP_CTRL_POLL 0x0010
138#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
139
140#define L2CAP_CTRL_TXSEQ_SHIFT 1
141#define L2CAP_CTRL_SUPER_SHIFT 2
142#define L2CAP_CTRL_REQSEQ_SHIFT 8
143#define L2CAP_CTRL_SAR_SHIFT 14
144
145/* L2CAP Extended Control Field bit mask */
146#define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
147#define L2CAP_EXT_CTRL_SAR 0x00030000
148#define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
149#define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
150
151#define L2CAP_EXT_CTRL_POLL 0x00040000
152#define L2CAP_EXT_CTRL_FINAL 0x00000002
153#define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
154
155#define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
156#define L2CAP_EXT_CTRL_SAR_SHIFT 16
157#define L2CAP_EXT_CTRL_SUPER_SHIFT 16
158#define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
1c2acffb
GP		 159
160/* L2CAP Supervisory Function */
ab784b73
AE		 161#define L2CAP_SUPER_RR 0x00
162#define L2CAP_SUPER_REJ 0x01
163#define L2CAP_SUPER_RNR 0x02
164#define L2CAP_SUPER_SREJ 0x03
1c2acffb
GP		 165
166/* L2CAP Segmentation and Reassembly */
7e0ef6ee
AE		 167#define L2CAP_SAR_UNSEGMENTED 0x00
168#define L2CAP_SAR_START 0x01
169#define L2CAP_SAR_END 0x02
170#define L2CAP_SAR_CONTINUE 0x03
1c2acffb 171
e2fd318e 172/* L2CAP Command rej. reasons */
8d6765aa
AE		 173#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
174#define L2CAP_REJ_MTU_EXCEEDED 0x0001
175#define L2CAP_REJ_INVALID_CID 0x0002
e2fd318e 176
1da177e4
LT		 177/* L2CAP structures */
178struct l2cap_hdr {
8e036fc3
AV		 179 __le16 len;
180 __le16 cid;
66c853cc 181} __packed;
1da177e4 182#define L2CAP_HDR_SIZE 4
d43cb289
AE		 183#define L2CAP_ENH_HDR_SIZE 6
184#define L2CAP_EXT_HDR_SIZE 8
185
186#define L2CAP_FCS_SIZE 2
187#define L2CAP_SDULEN_SIZE 2
188#define L2CAP_PSMLEN_SIZE 2
1da177e4
LT		 189
190struct l2cap_cmd_hdr {
191 __u8 code;
192 __u8 ident;
8e036fc3 193 __le16 len;
66c853cc 194} __packed;
1da177e4
LT		 195#define L2CAP_CMD_HDR_SIZE 4
196
e2fd318e
IK		 197struct l2cap_cmd_rej_unk {
198 __le16 reason;
199} __packed;
200
201struct l2cap_cmd_rej_mtu {
8e036fc3 202 __le16 reason;
e2fd318e
IK		 203 __le16 max_mtu;
204} __packed;
205
206struct l2cap_cmd_rej_cid {
207 __le16 reason;
208 __le16 scid;
209 __le16 dcid;
66c853cc 210} __packed;
1da177e4
LT		 211
212struct l2cap_conn_req {
8e036fc3
AV		 213 __le16 psm;
214 __le16 scid;
66c853cc 215} __packed;
1da177e4
LT		 216
217struct l2cap_conn_rsp {
8e036fc3
AV		 218 __le16 dcid;
219 __le16 scid;
220 __le16 result;
221 __le16 status;
66c853cc 222} __packed;
1da177e4 223
8db4dc46
GP		 224/* channel indentifier */
225#define L2CAP_CID_SIGNALING 0x0001
226#define L2CAP_CID_CONN_LESS 0x0002
acd7d370
VT		 227#define L2CAP_CID_LE_DATA 0x0004
228#define L2CAP_CID_LE_SIGNALING 0x0005
229#define L2CAP_CID_SMP 0x0006
8db4dc46
GP		 230#define L2CAP_CID_DYN_START 0x0040
231#define L2CAP_CID_DYN_END 0xffff
232
38094c75 233/* connect/create channel results */
47ec1dcd
MH		 234#define L2CAP_CR_SUCCESS 0x0000
235#define L2CAP_CR_PEND 0x0001
236#define L2CAP_CR_BAD_PSM 0x0002
237#define L2CAP_CR_SEC_BLOCK 0x0003
238#define L2CAP_CR_NO_MEM 0x0004
38094c75 239#define L2CAP_CR_BAD_AMP 0x0005
1da177e4 240
38094c75 241/* connect/create channel status */
47ec1dcd
MH		 242#define L2CAP_CS_NO_INFO 0x0000
243#define L2CAP_CS_AUTHEN_PEND 0x0001
244#define L2CAP_CS_AUTHOR_PEND 0x0002
1da177e4
LT		 245
246struct l2cap_conf_req {
8e036fc3
AV		 247 __le16 dcid;
248 __le16 flags;
1da177e4 249 __u8 data[0];
66c853cc 250} __packed;
1da177e4
LT		 251
252struct l2cap_conf_rsp {
8e036fc3
AV		 253 __le16 scid;
254 __le16 flags;
255 __le16 result;
1da177e4 256 __u8 data[0];
66c853cc 257} __packed;
1da177e4 258
5dee9e7c
MH		 259#define L2CAP_CONF_SUCCESS 0x0000
260#define L2CAP_CONF_UNACCEPT 0x0001
261#define L2CAP_CONF_REJECT 0x0002
262#define L2CAP_CONF_UNKNOWN 0x0003
0e8b207e 263#define L2CAP_CONF_PENDING 0x0004
5a9e7057 264#define L2CAP_CONF_EFS_REJECT 0x0005
1da177e4
LT		 265
266struct l2cap_conf_opt {
267 __u8 type;
268 __u8 len;
269 __u8 val[0];
66c853cc 270} __packed;
1da177e4
LT		 271#define L2CAP_CONF_OPT_SIZE 2
272
589d2746 273#define L2CAP_CONF_HINT 0x80
47ec1dcd 274#define L2CAP_CONF_MASK 0x7f
589d2746 275
1da177e4
LT		 276#define L2CAP_CONF_MTU 0x01
277#define L2CAP_CONF_FLUSH_TO 0x02
278#define L2CAP_CONF_QOS 0x03
279#define L2CAP_CONF_RFC 0x04
47ec1dcd 280#define L2CAP_CONF_FCS 0x05
5a9e7057 281#define L2CAP_CONF_EFS 0x06
6327eb98 282#define L2CAP_CONF_EWS 0x07
1da177e4
LT		 283
284#define L2CAP_CONF_MAX_SIZE 22
285
6464f35f
MH		 286struct l2cap_conf_rfc {
287 __u8 mode;
288 __u8 txwin_size;
289 __u8 max_transmit;
290 __le16 retrans_timeout;
291 __le16 monitor_timeout;
292 __le16 max_pdu_size;
66c853cc 293} __packed;
6464f35f
MH		 294
295#define L2CAP_MODE_BASIC 0x00
296#define L2CAP_MODE_RETRANS 0x01
297#define L2CAP_MODE_FLOWCTL 0x02
47ec1dcd 298#define L2CAP_MODE_ERTM 0x03
c6b03cf9 299#define L2CAP_MODE_STREAMING 0x04
6464f35f 300
5a9e7057
AE		 301struct l2cap_conf_efs {
302 __u8 id;
303 __u8 stype;
304 __le16 msdu;
305 __le32 sdu_itime;
306 __le32 acc_lat;
307 __le32 flush_to;
308} __packed;
309
8f7975b1
AE		 310#define L2CAP_SERV_NOTRAFIC 0x00
311#define L2CAP_SERV_BESTEFFORT 0x01
312#define L2CAP_SERV_GUARANTEED 0x02
313
314#define L2CAP_BESTEFFORT_ID 0x01
315
1da177e4 316struct l2cap_disconn_req {
8e036fc3
AV		 317 __le16 dcid;
318 __le16 scid;
66c853cc 319} __packed;
1da177e4
LT		 320
321struct l2cap_disconn_rsp {
8e036fc3
AV		 322 __le16 dcid;
323 __le16 scid;
66c853cc 324} __packed;
1da177e4
LT		 325
326struct l2cap_info_req {
8e036fc3 327 __le16 type;
66c853cc 328} __packed;
1da177e4
LT		 329
330struct l2cap_info_rsp {
8e036fc3
AV		 331 __le16 type;
332 __le16 result;
1da177e4 333 __u8 data[0];
66c853cc 334} __packed;
1da177e4 335
38094c75
MM		 336struct l2cap_create_chan_req {
337 __le16 psm;
338 __le16 scid;
339 __u8 amp_id;
340} __packed;
341
342struct l2cap_create_chan_rsp {
343 __le16 dcid;
344 __le16 scid;
345 __le16 result;
346 __le16 status;
347} __packed;
348
349struct l2cap_move_chan_req {
350 __le16 icid;
351 __u8 dest_amp_id;
352} __packed;
353
354struct l2cap_move_chan_rsp {
355 __le16 icid;
356 __le16 result;
357} __packed;
358
359#define L2CAP_MR_SUCCESS 0x0000
360#define L2CAP_MR_PEND 0x0001
361#define L2CAP_MR_BAD_ID 0x0002
362#define L2CAP_MR_SAME_ID 0x0003
363#define L2CAP_MR_NOT_SUPP 0x0004
364#define L2CAP_MR_COLLISION 0x0005
365#define L2CAP_MR_NOT_ALLOWED 0x0006
366
367struct l2cap_move_chan_cfm {
368 __le16 icid;
369 __le16 result;
370} __packed;
371
372#define L2CAP_MC_CONFIRMED 0x0000
373#define L2CAP_MC_UNCONFIRMED 0x0001
374
375struct l2cap_move_chan_cfm_rsp {
376 __le16 icid;
377} __packed;
378
1da177e4 379/* info type */
8d6765aa
AE		 380#define L2CAP_IT_CL_MTU 0x0001
381#define L2CAP_IT_FEAT_MASK 0x0002
382#define L2CAP_IT_FIXED_CHAN 0x0003
1da177e4
LT		 383
384/* info result */
8d6765aa
AE		 385#define L2CAP_IR_SUCCESS 0x0000
386#define L2CAP_IR_NOTSUPP 0x0001
1da177e4 387
de73115a
CT		 388struct l2cap_conn_param_update_req {
389 __le16 min;
390 __le16 max;
391 __le16 latency;
392 __le16 to_multiplier;
393} __packed;
394
395struct l2cap_conn_param_update_rsp {
396 __le16 result;
397} __packed;
398
399/* Connection Parameters result */
400#define L2CAP_CONN_PARAM_ACCEPTED 0x0000
401#define L2CAP_CONN_PARAM_REJECTED 0x0001
402
48454079 403/* ----- L2CAP channels and connections ----- */
39d5a3ee 404struct srej_list {
fb45de7d 405 __u16 tx_seq;
39d5a3ee
GP		 406 struct list_head list;
407};
408
48454079
GP		 409struct l2cap_chan {
410 struct sock *sk;
8c1d787b
GP		 411
412 struct l2cap_conn *conn;
413
89bc500e
GP		 414 __u8 state;
415
71ba0e56
GP		 416 atomic_t refcnt;
417
fe4128e0
GP		 418 __le16 psm;
419 __u16 dcid;
420 __u16 scid;
4343478f 421
0c1bc5c6
GP		 422 __u16 imtu;
423 __u16 omtu;
424 __u16 flush_to;
425 __u8 mode;
715ec005 426 __u8 chan_type;
2ea66482 427 __u8 chan_policy;
0c1bc5c6
GP		 428
429 __le16 sport;
430
4343478f 431 __u8 sec_level;
4343478f 432
fc7f8a7e
GP		 433 __u8 ident;
434
73ffa904
GP		 435 __u8 conf_req[64];
436 __u8 conf_len;
437 __u8 num_conf_req;
438 __u8 num_conf_rsp;
439
47d1ec61
GP		 440 __u8 fcs;
441
6327eb98 442 __u16 tx_win;
836be934 443 __u16 tx_win_max;
47d1ec61
GP		 444 __u8 max_tx;
445 __u16 retrans_timeout;
446 __u16 monitor_timeout;
447 __u16 mps;
448
c1360a1c 449 unsigned long conf_state;
e2ab4353 450 unsigned long conn_state;
d57b0e8b 451 unsigned long flags;
525cd185 452
fb45de7d
AE		 453 __u16 next_tx_seq;
454 __u16 expected_ack_seq;
455 __u16 expected_tx_seq;
0b209fae 456 __u16 buffer_seq;
fb45de7d
AE		 457 __u16 buffer_seq_srej;
458 __u16 srej_save_reqseq;
459 __u16 frames_sent;
460 __u16 unacked_frames;
6a026610
GP		 461 __u8 retry_count;
462 __u8 num_acked;
6f61fd47 463 __u16 sdu_len;
6f61fd47 464 struct sk_buff *sdu;
84084a31 465 struct sk_buff *sdu_last_frag;
6f61fd47 466
6327eb98 467 __u16 remote_tx_win;
2c03a7a4
GP		 468 __u8 remote_max_tx;
469 __u16 remote_mps;
42e5c802 470
5a9e7057
AE		 471 __u8 local_id;
472 __u8 local_stype;
473 __u16 local_msdu;
474 __u32 local_sdu_itime;
475 __u32 local_acc_lat;
476 __u32 local_flush_to;
477
478 __u8 remote_id;
479 __u8 remote_stype;
480 __u16 remote_msdu;
481 __u32 remote_sdu_itime;
482 __u32 remote_acc_lat;
483 __u32 remote_flush_to;
484
721c4181
GP		 485 struct delayed_work chan_timer;
486 struct delayed_work retrans_timer;
487 struct delayed_work monitor_timer;
488 struct delayed_work ack_timer;
489
58d35f87
GP		 490 struct sk_buff *tx_send_head;
491 struct sk_buff_head tx_q;
f1c6775b 492 struct sk_buff_head srej_q;
39d5a3ee 493 struct list_head srej_l;
e92c8e70 494
baa7e1fa 495 struct list_head list;
23691d75 496 struct list_head global_l;
80808e43
GP		 497
498 void *data;
499 struct l2cap_ops *ops;
500};
501
502struct l2cap_ops {
503 char *name;
504
505 struct l2cap_chan *(*new_connection) (void *data);
23070494 506 int (*recv) (void *data, struct sk_buff *skb);
ba3bd0ee 507 void (*close) (void *data);
89bc500e 508 void (*state_change) (void *data, int state);
1da177e4
LT		 509};
510
511struct l2cap_conn {
512 struct hci_conn *hcon;
73d80deb 513 struct hci_chan *hchan;
1da177e4
LT		 514
515 bdaddr_t *dst;
516 bdaddr_t *src;
517
518 unsigned int mtu;
519
4e8402a3
MH		 520 __u32 feat_mask;
521
522 __u8 info_state;
523 __u8 info_ident;
524
030013d8 525 struct delayed_work info_timer;
4e8402a3 526
1da177e4
LT		 527 spinlock_t lock;
528
529 struct sk_buff *rx_skb;
530 __u32 rx_len;
1da177e4
LT		 531 __u8 tx_ident;
532
2950f21a
MH		 533 __u8 disc_reason;
534
6c9d42a1 535 struct delayed_work security_timer;
1c1def09 536 struct smp_chan *smp_chan;
5d3de7df 537
baa7e1fa 538 struct list_head chan_l;
d01b2ff4 539 struct mutex chan_lock;
1da177e4
LT		 540};
541
4e8402a3 542#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
984947dc
MH		 543#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
544#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
4e8402a3 545
715ec005
GP		 546#define L2CAP_CHAN_RAW 1
547#define L2CAP_CHAN_CONN_LESS 2
548#define L2CAP_CHAN_CONN_ORIENTED 3
549
48454079 550/* ----- L2CAP socket info ----- */
1da177e4
LT		 551#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
552
553struct l2cap_pinfo {
554 struct bt_sock bt;
48454079 555 struct l2cap_chan *chan;
e328140f 556 struct sk_buff *rx_busy_skb;
1da177e4
LT		 557};
558
c1360a1c
GP		 559enum {
560 CONF_REQ_SENT,
561 CONF_INPUT_DONE,
562 CONF_OUTPUT_DONE,
563 CONF_MTU_DONE,
564 CONF_MODE_DONE,
565 CONF_CONNECT_PEND,
566 CONF_NO_FCS_RECV,
567 CONF_STATE2_DEVICE,
6327eb98 568 CONF_EWS_RECV,
0e8b207e
AE		 569 CONF_LOC_CONF_PEND,
570 CONF_REM_CONF_PEND,
c1360a1c 571};
f2fcfcd6
GP		 572
573#define L2CAP_CONF_MAX_CONF_REQ 2
574#define L2CAP_CONF_MAX_CONF_RSP 2
861d6882 575
e2ab4353 576enum {
e2ab4353
GP		 577 CONN_SREJ_SENT,
578 CONN_WAIT_F,
579 CONN_SREJ_ACT,
580 CONN_SEND_PBIT,
581 CONN_REMOTE_BUSY,
582 CONN_LOCAL_BUSY,
583 CONN_REJ_ACT,
584 CONN_SEND_FBIT,
585 CONN_RNR_SENT,
e2ab4353 586};
e90bac06 587
d57b0e8b
AE		 588/* Definitions for flags in l2cap_chan */
589enum {
43bd0f32 590 FLAG_ROLE_SWITCH,
15770b1a 591 FLAG_FORCE_ACTIVE,
ecf61bdb 592 FLAG_FORCE_RELIABLE,
d57b0e8b 593 FLAG_FLUSHABLE,
6327eb98 594 FLAG_EXT_CTRL,
5a9e7057 595 FLAG_EFS_ENABLE,
d57b0e8b
AE		 596};
597
371fd835
UF		 598static inline void l2cap_chan_hold(struct l2cap_chan *c)
599{
600 atomic_inc(&c->refcnt);
601}
602
603static inline void l2cap_chan_put(struct l2cap_chan *c)
604{
605 if (atomic_dec_and_test(&c->refcnt))
606 kfree(c);
607}
608
c2ec9c1b
GP		 609static inline void l2cap_set_timer(struct l2cap_chan *chan,
610 struct delayed_work *work, long timeout)
611{
612 BT_DBG("chan %p state %d timeout %ld", chan, chan->state, timeout);
613
371fd835
UF		 614 if (!__cancel_delayed_work(work))
615 l2cap_chan_hold(chan);
c2ec9c1b
GP		 616 schedule_delayed_work(work, timeout);
617}
618
371fd835
UF		 619static inline void l2cap_clear_timer(struct l2cap_chan *chan,
620 struct delayed_work *work)
c2ec9c1b 621{
371fd835
UF		 622 if (__cancel_delayed_work(work))
623 l2cap_chan_put(chan);
c2ec9c1b
GP		 624}
625
c9b66675 626#define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
371fd835 627#define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
1a09bcb9
GP		 628#define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
629 L2CAP_DEFAULT_RETRANS_TO);
371fd835 630#define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
1a09bcb9
GP		 631#define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
632 L2CAP_DEFAULT_MONITOR_TO);
371fd835 633#define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
1a09bcb9
GP		 634#define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
635 L2CAP_DEFAULT_ACK_TO);
371fd835 636#define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
c74e560c 637
836be934
AE		 638static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
639{
640 int offset;
641
642 offset = (seq1 - seq2) % (chan->tx_win_max + 1);
643 if (offset < 0)
644 offset += (chan->tx_win_max + 1);
645
646 return offset;
647}
648
649static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
650{
651 return (seq + 1) % (chan->tx_win_max + 1);
652}
653
42e5c802 654static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
1c2acffb 655{
1c2acffb
GP		 656 int sub;
657
42e5c802 658 sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
1c2acffb
GP		 659
660 if (sub < 0)
661 sub += 64;
662
2c03a7a4 663 return sub == ch->remote_tx_win;
1c2acffb
GP		 664}
665
0b209fae
AE		 666static inline __u16 __get_reqseq(struct l2cap_chan *chan, __u32 ctrl)
667{
668 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
669 return (ctrl & L2CAP_EXT_CTRL_REQSEQ) >>
670 L2CAP_EXT_CTRL_REQSEQ_SHIFT;
671 else
672 return (ctrl & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT;
673}
674
675static inline __u32 __set_reqseq(struct l2cap_chan *chan, __u32 reqseq)
676{
677 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
678 return (reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT) &
679 L2CAP_EXT_CTRL_REQSEQ;
680 else
681 return (reqseq << L2CAP_CTRL_REQSEQ_SHIFT) & L2CAP_CTRL_REQSEQ;
682}
fb45de7d
AE		 683
684static inline __u16 __get_txseq(struct l2cap_chan *chan, __u32 ctrl)
685{
686 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
687 return (ctrl & L2CAP_EXT_CTRL_TXSEQ) >>
688 L2CAP_EXT_CTRL_TXSEQ_SHIFT;
689 else
690 return (ctrl & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT;
691}
692
693static inline __u32 __set_txseq(struct l2cap_chan *chan, __u32 txseq)
694{
695 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
696 return (txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT) &
697 L2CAP_EXT_CTRL_TXSEQ;
698 else
699 return (txseq << L2CAP_CTRL_TXSEQ_SHIFT) & L2CAP_CTRL_TXSEQ;
700}
701
793c2f1c
AE		 702static inline bool __is_sframe(struct l2cap_chan *chan, __u32 ctrl)
703{
704 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
705 return ctrl & L2CAP_EXT_CTRL_FRAME_TYPE;
706 else
707 return ctrl & L2CAP_CTRL_FRAME_TYPE;
708}
709
710static inline __u32 __set_sframe(struct l2cap_chan *chan)
711{
712 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
713 return L2CAP_EXT_CTRL_FRAME_TYPE;
714 else
715 return L2CAP_CTRL_FRAME_TYPE;
716}
717
7e0ef6ee
AE		 718static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl)
719{
720 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
721 return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
722 else
723 return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
724}
725
726static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar)
727{
728 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
729 return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR;
730 else
731 return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR;
732}
733
734static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl)
735{
736 return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START;
737}
738
739static inline __u32 __get_sar_mask(struct l2cap_chan *chan)
740{
741 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
742 return L2CAP_EXT_CTRL_SAR;
743 else
744 return L2CAP_CTRL_SAR;
745}
1da177e4 746
ab784b73
AE		 747static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl)
748{
749 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
750 return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >>
751 L2CAP_EXT_CTRL_SUPER_SHIFT;
752 else
753 return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;
754}
755
756static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super)
757{
758 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
759 return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) &
760 L2CAP_EXT_CTRL_SUPERVISE;
761 else
762 return (super << L2CAP_CTRL_SUPER_SHIFT) &
763 L2CAP_CTRL_SUPERVISE;
764}
765
03f6715d
AE		 766static inline __u32 __set_ctrl_final(struct l2cap_chan *chan)
767{
768 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
769 return L2CAP_EXT_CTRL_FINAL;
770 else
771 return L2CAP_CTRL_FINAL;
772}
773
774static inline bool __is_ctrl_final(struct l2cap_chan *chan, __u32 ctrl)
775{
776 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
777 return ctrl & L2CAP_EXT_CTRL_FINAL;
778 else
779 return ctrl & L2CAP_CTRL_FINAL;
780}
e3781735
AE		 781
782static inline __u32 __set_ctrl_poll(struct l2cap_chan *chan)
783{
784 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
785 return L2CAP_EXT_CTRL_POLL;
786 else
787 return L2CAP_CTRL_POLL;
788}
789
790static inline bool __is_ctrl_poll(struct l2cap_chan *chan, __u32 ctrl)
791{
792 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
793 return ctrl & L2CAP_EXT_CTRL_POLL;
794 else
795 return ctrl & L2CAP_CTRL_POLL;
796}
88843ab0
AE		 797
798static inline __u32 __get_control(struct l2cap_chan *chan, void *p)
799{
800 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
801 return get_unaligned_le32(p);
802 else
803 return get_unaligned_le16(p);
804}
805
806static inline void __put_control(struct l2cap_chan *chan, __u32 control,
807 void *p)
808{
809 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
810 return put_unaligned_le32(control, p);
811 else
812 return put_unaligned_le16(control, p);
813}
814
815static inline __u8 __ctrl_size(struct l2cap_chan *chan)
816{
817 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
818 return L2CAP_EXT_HDR_SIZE - L2CAP_HDR_SIZE;
819 else
820 return L2CAP_ENH_HDR_SIZE - L2CAP_HDR_SIZE;
821}
1da177e4 822
bb58f747 823extern int disable_ertm;
bb58f747
GP		 824
825int l2cap_init_sockets(void);
826void l2cap_cleanup_sockets(void);
827
8c1d787b 828void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
dcba0dba 829int __l2cap_wait_ack(struct sock *sk);
68983259 830
9e4425ff
GP		 831int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
832int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
833
23691d75 834struct l2cap_chan *l2cap_chan_create(struct sock *sk);
0f852724 835void l2cap_chan_close(struct l2cap_chan *chan, int reason);
23691d75 836void l2cap_chan_destroy(struct l2cap_chan *chan);
03a00194
GP		 837inline int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
838 bdaddr_t *dst);
5e59b791
LAD		 839int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
840 u32 priority);
e328140f 841void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
d45fc423 842int l2cap_chan_check_security(struct l2cap_chan *chan);
bb58f747 843
1da177e4 844#endif /* __L2CAP_H */
Linux kernel - Deliverables
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