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.
7 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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;
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.
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.
30 #include <asm/unaligned.h>
31 #include <linux/atomic.h>
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
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 #define L2CAP_WAIT_ACK_POLL_PERIOD msecs_to_jiffies(200)
59 #define L2CAP_WAIT_ACK_TIMEOUT msecs_to_jiffies(10000)
61 #define L2CAP_A2MP_DEFAULT_MTU 670
63 /* L2CAP socket address */
65 sa_family_t l2_family;
72 /* L2CAP socket options */
73 #define L2CAP_OPTIONS 0x01
74 struct l2cap_options {
84 #define L2CAP_CONNINFO 0x02
85 struct l2cap_conninfo {
91 #define L2CAP_LM_MASTER 0x0001
92 #define L2CAP_LM_AUTH 0x0002
93 #define L2CAP_LM_ENCRYPT 0x0004
94 #define L2CAP_LM_TRUSTED 0x0008
95 #define L2CAP_LM_RELIABLE 0x0010
96 #define L2CAP_LM_SECURE 0x0020
97 #define L2CAP_LM_FIPS 0x0040
99 /* L2CAP command codes */
100 #define L2CAP_COMMAND_REJ 0x01
101 #define L2CAP_CONN_REQ 0x02
102 #define L2CAP_CONN_RSP 0x03
103 #define L2CAP_CONF_REQ 0x04
104 #define L2CAP_CONF_RSP 0x05
105 #define L2CAP_DISCONN_REQ 0x06
106 #define L2CAP_DISCONN_RSP 0x07
107 #define L2CAP_ECHO_REQ 0x08
108 #define L2CAP_ECHO_RSP 0x09
109 #define L2CAP_INFO_REQ 0x0a
110 #define L2CAP_INFO_RSP 0x0b
111 #define L2CAP_CREATE_CHAN_REQ 0x0c
112 #define L2CAP_CREATE_CHAN_RSP 0x0d
113 #define L2CAP_MOVE_CHAN_REQ 0x0e
114 #define L2CAP_MOVE_CHAN_RSP 0x0f
115 #define L2CAP_MOVE_CHAN_CFM 0x10
116 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11
117 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
118 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
119 #define L2CAP_LE_CONN_REQ 0x14
120 #define L2CAP_LE_CONN_RSP 0x15
121 #define L2CAP_LE_CREDITS 0x16
123 /* L2CAP extended feature mask */
124 #define L2CAP_FEAT_FLOWCTL 0x00000001
125 #define L2CAP_FEAT_RETRANS 0x00000002
126 #define L2CAP_FEAT_BIDIR_QOS 0x00000004
127 #define L2CAP_FEAT_ERTM 0x00000008
128 #define L2CAP_FEAT_STREAMING 0x00000010
129 #define L2CAP_FEAT_FCS 0x00000020
130 #define L2CAP_FEAT_EXT_FLOW 0x00000040
131 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
132 #define L2CAP_FEAT_EXT_WINDOW 0x00000100
133 #define L2CAP_FEAT_UCD 0x00000200
135 /* L2CAP checksum option */
136 #define L2CAP_FCS_NONE 0x00
137 #define L2CAP_FCS_CRC16 0x01
139 /* L2CAP fixed channels */
140 #define L2CAP_FC_SIG_BREDR 0x02
141 #define L2CAP_FC_CONNLESS 0x04
142 #define L2CAP_FC_A2MP 0x08
143 #define L2CAP_FC_ATT 0x10
144 #define L2CAP_FC_SIG_LE 0x20
145 #define L2CAP_FC_SMP_LE 0x40
146 #define L2CAP_FC_SMP_BREDR 0x80
148 /* L2CAP Control Field bit masks */
149 #define L2CAP_CTRL_SAR 0xC000
150 #define L2CAP_CTRL_REQSEQ 0x3F00
151 #define L2CAP_CTRL_TXSEQ 0x007E
152 #define L2CAP_CTRL_SUPERVISE 0x000C
154 #define L2CAP_CTRL_RETRANS 0x0080
155 #define L2CAP_CTRL_FINAL 0x0080
156 #define L2CAP_CTRL_POLL 0x0010
157 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
159 #define L2CAP_CTRL_TXSEQ_SHIFT 1
160 #define L2CAP_CTRL_SUPER_SHIFT 2
161 #define L2CAP_CTRL_POLL_SHIFT 4
162 #define L2CAP_CTRL_FINAL_SHIFT 7
163 #define L2CAP_CTRL_REQSEQ_SHIFT 8
164 #define L2CAP_CTRL_SAR_SHIFT 14
166 /* L2CAP Extended Control Field bit mask */
167 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
168 #define L2CAP_EXT_CTRL_SAR 0x00030000
169 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
170 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
172 #define L2CAP_EXT_CTRL_POLL 0x00040000
173 #define L2CAP_EXT_CTRL_FINAL 0x00000002
174 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
176 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1
177 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
178 #define L2CAP_EXT_CTRL_SAR_SHIFT 16
179 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16
180 #define L2CAP_EXT_CTRL_POLL_SHIFT 18
181 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
183 /* L2CAP Supervisory Function */
184 #define L2CAP_SUPER_RR 0x00
185 #define L2CAP_SUPER_REJ 0x01
186 #define L2CAP_SUPER_RNR 0x02
187 #define L2CAP_SUPER_SREJ 0x03
189 /* L2CAP Segmentation and Reassembly */
190 #define L2CAP_SAR_UNSEGMENTED 0x00
191 #define L2CAP_SAR_START 0x01
192 #define L2CAP_SAR_END 0x02
193 #define L2CAP_SAR_CONTINUE 0x03
195 /* L2CAP Command rej. reasons */
196 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
197 #define L2CAP_REJ_MTU_EXCEEDED 0x0001
198 #define L2CAP_REJ_INVALID_CID 0x0002
200 /* L2CAP structures */
205 #define L2CAP_HDR_SIZE 4
206 #define L2CAP_ENH_HDR_SIZE 6
207 #define L2CAP_EXT_HDR_SIZE 8
209 #define L2CAP_FCS_SIZE 2
210 #define L2CAP_SDULEN_SIZE 2
211 #define L2CAP_PSMLEN_SIZE 2
212 #define L2CAP_ENH_CTRL_SIZE 2
213 #define L2CAP_EXT_CTRL_SIZE 4
215 struct l2cap_cmd_hdr {
220 #define L2CAP_CMD_HDR_SIZE 4
222 struct l2cap_cmd_rej_unk {
226 struct l2cap_cmd_rej_mtu {
231 struct l2cap_cmd_rej_cid {
237 struct l2cap_conn_req {
242 struct l2cap_conn_rsp {
249 /* protocol/service multiplexer (PSM) */
250 #define L2CAP_PSM_SDP 0x0001
251 #define L2CAP_PSM_RFCOMM 0x0003
252 #define L2CAP_PSM_3DSP 0x0021
253 #define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */
255 /* channel identifier */
256 #define L2CAP_CID_SIGNALING 0x0001
257 #define L2CAP_CID_CONN_LESS 0x0002
258 #define L2CAP_CID_A2MP 0x0003
259 #define L2CAP_CID_ATT 0x0004
260 #define L2CAP_CID_LE_SIGNALING 0x0005
261 #define L2CAP_CID_SMP 0x0006
262 #define L2CAP_CID_SMP_BREDR 0x0007
263 #define L2CAP_CID_DYN_START 0x0040
264 #define L2CAP_CID_DYN_END 0xffff
265 #define L2CAP_CID_LE_DYN_END 0x007f
267 /* connect/create channel results */
268 #define L2CAP_CR_SUCCESS 0x0000
269 #define L2CAP_CR_PEND 0x0001
270 #define L2CAP_CR_BAD_PSM 0x0002
271 #define L2CAP_CR_SEC_BLOCK 0x0003
272 #define L2CAP_CR_NO_MEM 0x0004
273 #define L2CAP_CR_BAD_AMP 0x0005
274 #define L2CAP_CR_AUTHENTICATION 0x0005
275 #define L2CAP_CR_AUTHORIZATION 0x0006
276 #define L2CAP_CR_BAD_KEY_SIZE 0x0007
277 #define L2CAP_CR_ENCRYPTION 0x0008
279 /* connect/create channel status */
280 #define L2CAP_CS_NO_INFO 0x0000
281 #define L2CAP_CS_AUTHEN_PEND 0x0001
282 #define L2CAP_CS_AUTHOR_PEND 0x0002
284 struct l2cap_conf_req {
290 struct l2cap_conf_rsp {
297 #define L2CAP_CONF_SUCCESS 0x0000
298 #define L2CAP_CONF_UNACCEPT 0x0001
299 #define L2CAP_CONF_REJECT 0x0002
300 #define L2CAP_CONF_UNKNOWN 0x0003
301 #define L2CAP_CONF_PENDING 0x0004
302 #define L2CAP_CONF_EFS_REJECT 0x0005
304 /* configuration req/rsp continuation flag */
305 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001
307 struct l2cap_conf_opt {
312 #define L2CAP_CONF_OPT_SIZE 2
314 #define L2CAP_CONF_HINT 0x80
315 #define L2CAP_CONF_MASK 0x7f
317 #define L2CAP_CONF_MTU 0x01
318 #define L2CAP_CONF_FLUSH_TO 0x02
319 #define L2CAP_CONF_QOS 0x03
320 #define L2CAP_CONF_RFC 0x04
321 #define L2CAP_CONF_FCS 0x05
322 #define L2CAP_CONF_EFS 0x06
323 #define L2CAP_CONF_EWS 0x07
325 #define L2CAP_CONF_MAX_SIZE 22
327 struct l2cap_conf_rfc {
331 __le16 retrans_timeout;
332 __le16 monitor_timeout;
336 #define L2CAP_MODE_BASIC 0x00
337 #define L2CAP_MODE_RETRANS 0x01
338 #define L2CAP_MODE_FLOWCTL 0x02
339 #define L2CAP_MODE_ERTM 0x03
340 #define L2CAP_MODE_STREAMING 0x04
342 /* Unlike the above this one doesn't actually map to anything that would
343 * ever be sent over the air. Therefore, use a value that's unlikely to
344 * ever be used in the BR/EDR configuration phase.
346 #define L2CAP_MODE_LE_FLOWCTL 0x80
348 struct l2cap_conf_efs {
357 #define L2CAP_SERV_NOTRAFIC 0x00
358 #define L2CAP_SERV_BESTEFFORT 0x01
359 #define L2CAP_SERV_GUARANTEED 0x02
361 #define L2CAP_BESTEFFORT_ID 0x01
363 struct l2cap_disconn_req {
368 struct l2cap_disconn_rsp {
373 struct l2cap_info_req {
377 struct l2cap_info_rsp {
383 struct l2cap_create_chan_req {
389 struct l2cap_create_chan_rsp {
396 struct l2cap_move_chan_req {
401 struct l2cap_move_chan_rsp {
406 #define L2CAP_MR_SUCCESS 0x0000
407 #define L2CAP_MR_PEND 0x0001
408 #define L2CAP_MR_BAD_ID 0x0002
409 #define L2CAP_MR_SAME_ID 0x0003
410 #define L2CAP_MR_NOT_SUPP 0x0004
411 #define L2CAP_MR_COLLISION 0x0005
412 #define L2CAP_MR_NOT_ALLOWED 0x0006
414 struct l2cap_move_chan_cfm {
419 #define L2CAP_MC_CONFIRMED 0x0000
420 #define L2CAP_MC_UNCONFIRMED 0x0001
422 struct l2cap_move_chan_cfm_rsp {
427 #define L2CAP_IT_CL_MTU 0x0001
428 #define L2CAP_IT_FEAT_MASK 0x0002
429 #define L2CAP_IT_FIXED_CHAN 0x0003
432 #define L2CAP_IR_SUCCESS 0x0000
433 #define L2CAP_IR_NOTSUPP 0x0001
435 struct l2cap_conn_param_update_req {
439 __le16 to_multiplier;
442 struct l2cap_conn_param_update_rsp {
446 /* Connection Parameters result */
447 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000
448 #define L2CAP_CONN_PARAM_REJECTED 0x0001
450 #define L2CAP_LE_MAX_CREDITS 10
451 #define L2CAP_LE_DEFAULT_MPS 230
453 struct l2cap_le_conn_req {
461 struct l2cap_le_conn_rsp {
469 struct l2cap_le_credits {
474 /* ----- L2CAP channels and connections ----- */
475 struct l2cap_seq_list {
482 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF
483 #define L2CAP_SEQ_LIST_TAIL 0x8000
486 struct l2cap_conn *conn;
487 struct hci_conn *hs_hcon;
488 struct hci_chan *hs_hchan;
525 __u16 retrans_timeout;
526 __u16 monitor_timeout;
535 unsigned long conf_state;
536 unsigned long conn_state;
546 __u16 expected_ack_seq;
547 __u16 expected_tx_seq;
549 __u16 srej_save_reqseq;
550 __u16 last_acked_seq;
552 __u16 unacked_frames;
556 struct sk_buff *sdu_last_frag;
565 __u32 local_sdu_itime;
567 __u32 local_flush_to;
572 __u32 remote_sdu_itime;
573 __u32 remote_acc_lat;
574 __u32 remote_flush_to;
576 struct delayed_work chan_timer;
577 struct delayed_work retrans_timer;
578 struct delayed_work monitor_timer;
579 struct delayed_work ack_timer;
581 struct sk_buff *tx_send_head;
582 struct sk_buff_head tx_q;
583 struct sk_buff_head srej_q;
584 struct l2cap_seq_list srej_list;
585 struct l2cap_seq_list retrans_list;
587 struct list_head list;
588 struct list_head global_l;
591 const struct l2cap_ops *ops;
598 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan);
599 int (*recv) (struct l2cap_chan * chan,
600 struct sk_buff *skb);
601 void (*teardown) (struct l2cap_chan *chan, int err);
602 void (*close) (struct l2cap_chan *chan);
603 void (*state_change) (struct l2cap_chan *chan,
605 void (*ready) (struct l2cap_chan *chan);
606 void (*defer) (struct l2cap_chan *chan);
607 void (*resume) (struct l2cap_chan *chan);
608 void (*suspend) (struct l2cap_chan *chan);
609 void (*set_shutdown) (struct l2cap_chan *chan);
610 long (*get_sndtimeo) (struct l2cap_chan *chan);
611 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
612 unsigned long hdr_len,
613 unsigned long len, int nb);
617 struct hci_conn *hcon;
618 struct hci_chan *hchan;
623 __u8 remote_fixed_chan;
624 __u8 local_fixed_chan;
629 struct delayed_work info_timer;
631 struct sk_buff *rx_skb;
634 struct mutex ident_lock;
636 struct sk_buff_head pending_rx;
637 struct work_struct pending_rx_work;
639 struct work_struct id_addr_update_work;
643 struct l2cap_chan *smp;
645 struct list_head chan_l;
646 struct mutex chan_lock;
648 struct list_head users;
652 struct list_head list;
653 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user);
654 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user);
657 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
658 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
659 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
661 #define L2CAP_CHAN_RAW 1
662 #define L2CAP_CHAN_CONN_LESS 2
663 #define L2CAP_CHAN_CONN_ORIENTED 3
664 #define L2CAP_CHAN_FIXED 4
666 /* ----- L2CAP socket info ----- */
667 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
671 struct l2cap_chan *chan;
672 struct sk_buff *rx_busy_skb;
690 #define L2CAP_CONF_MAX_CONF_REQ 2
691 #define L2CAP_CONF_MAX_CONF_RSP 2
705 /* Definitions for flags in l2cap_chan */
714 FLAG_LE_CONN_REQ_SENT,
715 FLAG_PENDING_SECURITY,
719 /* Lock nesting levels for L2CAP channels. We need these because lockdep
720 * otherwise considers all channels equal and will e.g. complain about a
721 * connection oriented channel triggering SMP procedures or a listening
722 * channel creating and locking a child channel.
726 L2CAP_NESTING_NORMAL,
727 L2CAP_NESTING_PARENT,
732 L2CAP_TX_STATE_WAIT_F,
737 L2CAP_RX_STATE_SREJ_SENT,
739 L2CAP_RX_STATE_WAIT_P,
740 L2CAP_RX_STATE_WAIT_F,
744 L2CAP_TXSEQ_EXPECTED,
745 L2CAP_TXSEQ_EXPECTED_SREJ,
746 L2CAP_TXSEQ_UNEXPECTED,
747 L2CAP_TXSEQ_UNEXPECTED_SREJ,
748 L2CAP_TXSEQ_DUPLICATE,
749 L2CAP_TXSEQ_DUPLICATE_SREJ,
751 L2CAP_TXSEQ_INVALID_IGNORE,
755 L2CAP_EV_DATA_REQUEST,
756 L2CAP_EV_LOCAL_BUSY_DETECTED,
757 L2CAP_EV_LOCAL_BUSY_CLEAR,
758 L2CAP_EV_RECV_REQSEQ_AND_FBIT,
762 L2CAP_EV_EXPLICIT_POLL,
763 L2CAP_EV_RECV_IFRAME,
772 L2CAP_MOVE_ROLE_NONE,
773 L2CAP_MOVE_ROLE_INITIATOR,
774 L2CAP_MOVE_ROLE_RESPONDER,
781 L2CAP_MOVE_WAIT_RSP_SUCCESS,
782 L2CAP_MOVE_WAIT_CONFIRM,
783 L2CAP_MOVE_WAIT_CONFIRM_RSP,
784 L2CAP_MOVE_WAIT_LOGICAL_COMP,
785 L2CAP_MOVE_WAIT_LOGICAL_CFM,
786 L2CAP_MOVE_WAIT_LOCAL_BUSY,
787 L2CAP_MOVE_WAIT_PREPARE,
790 void l2cap_chan_hold(struct l2cap_chan *c);
791 void l2cap_chan_put(struct l2cap_chan *c);
793 static inline void l2cap_chan_lock(struct l2cap_chan *chan)
795 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting));
798 static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
800 mutex_unlock(&chan->lock);
803 static inline void l2cap_set_timer(struct l2cap_chan *chan,
804 struct delayed_work *work, long timeout)
806 BT_DBG("chan %p state %s timeout %ld", chan,
807 state_to_string(chan->state), timeout);
809 /* If delayed work cancelled do not hold(chan)
810 since it is already done with previous set_timer */
811 if (!cancel_delayed_work(work))
812 l2cap_chan_hold(chan);
814 schedule_delayed_work(work, timeout);
817 static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
818 struct delayed_work *work)
822 /* put(chan) if delayed work cancelled otherwise it
823 is done in delayed work function */
824 ret = cancel_delayed_work(work);
826 l2cap_chan_put(chan);
831 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
832 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
833 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
834 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
835 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
836 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
837 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
839 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
844 return chan->tx_win_max + 1 - seq2 + seq1;
847 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
849 return (seq + 1) % (chan->tx_win_max + 1);
852 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
857 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb)
862 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan,
863 unsigned long hdr_len,
864 unsigned long len, int nb)
866 return ERR_PTR(-ENOSYS);
869 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
873 static inline void l2cap_chan_no_close(struct l2cap_chan *chan)
877 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
881 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan,
886 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
890 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan)
894 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan)
898 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan)
902 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
907 extern bool disable_ertm;
909 int l2cap_init_sockets(void);
910 void l2cap_cleanup_sockets(void);
911 bool l2cap_is_socket(struct socket *sock);
913 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan);
914 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
916 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
917 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
919 struct l2cap_chan *l2cap_chan_create(void);
920 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
921 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
922 bdaddr_t *dst, u8 dst_type);
923 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len);
924 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
925 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator);
926 void l2cap_chan_set_defaults(struct l2cap_chan *chan);
927 int l2cap_ertm_init(struct l2cap_chan *chan);
928 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
929 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
930 void l2cap_chan_del(struct l2cap_chan *chan, int err);
931 void l2cap_send_conn_req(struct l2cap_chan *chan);
932 void l2cap_move_start(struct l2cap_chan *chan);
933 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
935 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
937 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn);
938 void l2cap_conn_put(struct l2cap_conn *conn);
940 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user);
941 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user);
943 #endif /* __L2CAP_H */