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>
33 #define L2CAP_DEFAULT_MTU 672
34 #define L2CAP_DEFAULT_MIN_MTU 48
35 #define L2CAP_DEFAULT_FLUSH_TO 0xffff
36 #define L2CAP_DEFAULT_TX_WINDOW 63
37 #define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF
38 #define L2CAP_DEFAULT_MAX_TX 3
39 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */
40 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
41 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1009 /* Sized for 3-DH5 packet */
42 #define L2CAP_DEFAULT_ACK_TO 200
43 #define L2CAP_LE_DEFAULT_MTU 23
44 #define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF
45 #define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF
46 #define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF
48 #define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */
49 #define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */
51 /* L2CAP socket address */
53 sa_family_t l2_family;
59 /* L2CAP socket options */
60 #define L2CAP_OPTIONS 0x01
61 struct l2cap_options {
71 #define L2CAP_CONNINFO 0x02
72 struct l2cap_conninfo {
78 #define L2CAP_LM_MASTER 0x0001
79 #define L2CAP_LM_AUTH 0x0002
80 #define L2CAP_LM_ENCRYPT 0x0004
81 #define L2CAP_LM_TRUSTED 0x0008
82 #define L2CAP_LM_RELIABLE 0x0010
83 #define L2CAP_LM_SECURE 0x0020
85 /* L2CAP command codes */
86 #define L2CAP_COMMAND_REJ 0x01
87 #define L2CAP_CONN_REQ 0x02
88 #define L2CAP_CONN_RSP 0x03
89 #define L2CAP_CONF_REQ 0x04
90 #define L2CAP_CONF_RSP 0x05
91 #define L2CAP_DISCONN_REQ 0x06
92 #define L2CAP_DISCONN_RSP 0x07
93 #define L2CAP_ECHO_REQ 0x08
94 #define L2CAP_ECHO_RSP 0x09
95 #define L2CAP_INFO_REQ 0x0a
96 #define L2CAP_INFO_RSP 0x0b
97 #define L2CAP_CREATE_CHAN_REQ 0x0c
98 #define L2CAP_CREATE_CHAN_RSP 0x0d
99 #define L2CAP_MOVE_CHAN_REQ 0x0e
100 #define L2CAP_MOVE_CHAN_RSP 0x0f
101 #define L2CAP_MOVE_CHAN_CFM 0x10
102 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11
103 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
104 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
106 /* L2CAP extended feature mask */
107 #define L2CAP_FEAT_FLOWCTL 0x00000001
108 #define L2CAP_FEAT_RETRANS 0x00000002
109 #define L2CAP_FEAT_BIDIR_QOS 0x00000004
110 #define L2CAP_FEAT_ERTM 0x00000008
111 #define L2CAP_FEAT_STREAMING 0x00000010
112 #define L2CAP_FEAT_FCS 0x00000020
113 #define L2CAP_FEAT_EXT_FLOW 0x00000040
114 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
115 #define L2CAP_FEAT_EXT_WINDOW 0x00000100
116 #define L2CAP_FEAT_UCD 0x00000200
118 /* L2CAP checksum option */
119 #define L2CAP_FCS_NONE 0x00
120 #define L2CAP_FCS_CRC16 0x01
122 /* L2CAP fixed channels */
123 #define L2CAP_FC_L2CAP 0x02
124 #define L2CAP_FC_A2MP 0x08
126 /* L2CAP Control Field bit masks */
127 #define L2CAP_CTRL_SAR 0xC000
128 #define L2CAP_CTRL_REQSEQ 0x3F00
129 #define L2CAP_CTRL_TXSEQ 0x007E
130 #define L2CAP_CTRL_SUPERVISE 0x000C
132 #define L2CAP_CTRL_RETRANS 0x0080
133 #define L2CAP_CTRL_FINAL 0x0080
134 #define L2CAP_CTRL_POLL 0x0010
135 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
137 #define L2CAP_CTRL_TXSEQ_SHIFT 1
138 #define L2CAP_CTRL_SUPER_SHIFT 2
139 #define L2CAP_CTRL_REQSEQ_SHIFT 8
140 #define L2CAP_CTRL_SAR_SHIFT 14
142 /* L2CAP Extended Control Field bit mask */
143 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
144 #define L2CAP_EXT_CTRL_SAR 0x00030000
145 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
146 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
148 #define L2CAP_EXT_CTRL_POLL 0x00040000
149 #define L2CAP_EXT_CTRL_FINAL 0x00000002
150 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
152 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
153 #define L2CAP_EXT_CTRL_SAR_SHIFT 16
154 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16
155 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
157 /* L2CAP Supervisory Function */
158 #define L2CAP_SUPER_RR 0x00
159 #define L2CAP_SUPER_REJ 0x01
160 #define L2CAP_SUPER_RNR 0x02
161 #define L2CAP_SUPER_SREJ 0x03
163 /* L2CAP Segmentation and Reassembly */
164 #define L2CAP_SAR_UNSEGMENTED 0x00
165 #define L2CAP_SAR_START 0x01
166 #define L2CAP_SAR_END 0x02
167 #define L2CAP_SAR_CONTINUE 0x03
169 /* L2CAP Command rej. reasons */
170 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
171 #define L2CAP_REJ_MTU_EXCEEDED 0x0001
172 #define L2CAP_REJ_INVALID_CID 0x0002
174 /* L2CAP structures */
179 #define L2CAP_HDR_SIZE 4
180 #define L2CAP_ENH_HDR_SIZE 6
181 #define L2CAP_EXT_HDR_SIZE 8
183 #define L2CAP_FCS_SIZE 2
184 #define L2CAP_SDULEN_SIZE 2
185 #define L2CAP_PSMLEN_SIZE 2
187 struct l2cap_cmd_hdr {
192 #define L2CAP_CMD_HDR_SIZE 4
194 struct l2cap_cmd_rej_unk {
198 struct l2cap_cmd_rej_mtu {
203 struct l2cap_cmd_rej_cid {
209 struct l2cap_conn_req {
214 struct l2cap_conn_rsp {
221 /* channel indentifier */
222 #define L2CAP_CID_SIGNALING 0x0001
223 #define L2CAP_CID_CONN_LESS 0x0002
224 #define L2CAP_CID_LE_DATA 0x0004
225 #define L2CAP_CID_LE_SIGNALING 0x0005
226 #define L2CAP_CID_SMP 0x0006
227 #define L2CAP_CID_DYN_START 0x0040
228 #define L2CAP_CID_DYN_END 0xffff
230 /* connect/create channel results */
231 #define L2CAP_CR_SUCCESS 0x0000
232 #define L2CAP_CR_PEND 0x0001
233 #define L2CAP_CR_BAD_PSM 0x0002
234 #define L2CAP_CR_SEC_BLOCK 0x0003
235 #define L2CAP_CR_NO_MEM 0x0004
236 #define L2CAP_CR_BAD_AMP 0x0005
238 /* connect/create channel status */
239 #define L2CAP_CS_NO_INFO 0x0000
240 #define L2CAP_CS_AUTHEN_PEND 0x0001
241 #define L2CAP_CS_AUTHOR_PEND 0x0002
243 struct l2cap_conf_req {
249 struct l2cap_conf_rsp {
256 #define L2CAP_CONF_SUCCESS 0x0000
257 #define L2CAP_CONF_UNACCEPT 0x0001
258 #define L2CAP_CONF_REJECT 0x0002
259 #define L2CAP_CONF_UNKNOWN 0x0003
260 #define L2CAP_CONF_PENDING 0x0004
261 #define L2CAP_CONF_EFS_REJECT 0x0005
263 struct l2cap_conf_opt {
268 #define L2CAP_CONF_OPT_SIZE 2
270 #define L2CAP_CONF_HINT 0x80
271 #define L2CAP_CONF_MASK 0x7f
273 #define L2CAP_CONF_MTU 0x01
274 #define L2CAP_CONF_FLUSH_TO 0x02
275 #define L2CAP_CONF_QOS 0x03
276 #define L2CAP_CONF_RFC 0x04
277 #define L2CAP_CONF_FCS 0x05
278 #define L2CAP_CONF_EFS 0x06
279 #define L2CAP_CONF_EWS 0x07
281 #define L2CAP_CONF_MAX_SIZE 22
283 struct l2cap_conf_rfc {
287 __le16 retrans_timeout;
288 __le16 monitor_timeout;
292 #define L2CAP_MODE_BASIC 0x00
293 #define L2CAP_MODE_RETRANS 0x01
294 #define L2CAP_MODE_FLOWCTL 0x02
295 #define L2CAP_MODE_ERTM 0x03
296 #define L2CAP_MODE_STREAMING 0x04
298 struct l2cap_conf_efs {
307 #define L2CAP_SERV_NOTRAFIC 0x00
308 #define L2CAP_SERV_BESTEFFORT 0x01
309 #define L2CAP_SERV_GUARANTEED 0x02
311 #define L2CAP_BESTEFFORT_ID 0x01
313 struct l2cap_disconn_req {
318 struct l2cap_disconn_rsp {
323 struct l2cap_info_req {
327 struct l2cap_info_rsp {
333 struct l2cap_create_chan_req {
339 struct l2cap_create_chan_rsp {
346 struct l2cap_move_chan_req {
351 struct l2cap_move_chan_rsp {
356 #define L2CAP_MR_SUCCESS 0x0000
357 #define L2CAP_MR_PEND 0x0001
358 #define L2CAP_MR_BAD_ID 0x0002
359 #define L2CAP_MR_SAME_ID 0x0003
360 #define L2CAP_MR_NOT_SUPP 0x0004
361 #define L2CAP_MR_COLLISION 0x0005
362 #define L2CAP_MR_NOT_ALLOWED 0x0006
364 struct l2cap_move_chan_cfm {
369 #define L2CAP_MC_CONFIRMED 0x0000
370 #define L2CAP_MC_UNCONFIRMED 0x0001
372 struct l2cap_move_chan_cfm_rsp {
377 #define L2CAP_IT_CL_MTU 0x0001
378 #define L2CAP_IT_FEAT_MASK 0x0002
379 #define L2CAP_IT_FIXED_CHAN 0x0003
382 #define L2CAP_IR_SUCCESS 0x0000
383 #define L2CAP_IR_NOTSUPP 0x0001
385 struct l2cap_conn_param_update_req {
389 __le16 to_multiplier;
392 struct l2cap_conn_param_update_rsp {
396 /* Connection Parameters result */
397 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000
398 #define L2CAP_CONN_PARAM_REJECTED 0x0001
400 /* ----- L2CAP channels and connections ----- */
403 struct list_head list;
409 struct l2cap_conn *conn;
442 __u16 retrans_timeout;
443 __u16 monitor_timeout;
446 unsigned long conf_state;
447 unsigned long conn_state;
451 __u16 expected_ack_seq;
452 __u16 expected_tx_seq;
454 __u16 buffer_seq_srej;
455 __u16 srej_save_reqseq;
457 __u16 unacked_frames;
462 struct sk_buff *sdu_last_frag;
471 __u32 local_sdu_itime;
473 __u32 local_flush_to;
478 __u32 remote_sdu_itime;
479 __u32 remote_acc_lat;
480 __u32 remote_flush_to;
482 struct timer_list chan_timer;
483 struct timer_list retrans_timer;
484 struct timer_list monitor_timer;
485 struct timer_list ack_timer;
486 struct sk_buff *tx_send_head;
487 struct sk_buff_head tx_q;
488 struct sk_buff_head srej_q;
489 struct list_head srej_l;
491 struct list_head list;
492 struct list_head global_l;
495 struct l2cap_ops *ops;
501 struct l2cap_chan *(*new_connection) (void *data);
502 int (*recv) (void *data, struct sk_buff *skb);
503 void (*close) (void *data);
504 void (*state_change) (void *data, int state);
508 struct hci_conn *hcon;
509 struct hci_chan *hchan;
521 struct timer_list info_timer;
525 struct sk_buff *rx_skb;
531 struct timer_list security_timer;
532 struct smp_chan *smp_chan;
534 struct list_head chan_l;
538 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
539 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
540 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
542 #define L2CAP_CHAN_RAW 1
543 #define L2CAP_CHAN_CONN_LESS 2
544 #define L2CAP_CHAN_CONN_ORIENTED 3
546 /* ----- L2CAP socket info ----- */
547 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
551 struct l2cap_chan *chan;
552 struct sk_buff *rx_busy_skb;
569 #define L2CAP_CONF_MAX_CONF_REQ 2
570 #define L2CAP_CONF_MAX_CONF_RSP 2
584 /* Definitions for flags in l2cap_chan */
594 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
595 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
596 #define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
597 L2CAP_DEFAULT_RETRANS_TO);
598 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
599 #define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
600 L2CAP_DEFAULT_MONITOR_TO);
601 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
602 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
603 L2CAP_DEFAULT_ACK_TO);
604 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
606 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
610 offset = (seq1 - seq2) % (chan->tx_win_max + 1);
612 offset += (chan->tx_win_max + 1);
617 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
619 return (seq + 1) % (chan->tx_win_max + 1);
622 static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
626 sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
631 return sub == ch->remote_tx_win;
634 static inline __u16 __get_reqseq(struct l2cap_chan *chan, __u32 ctrl)
636 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
637 return (ctrl & L2CAP_EXT_CTRL_REQSEQ) >>
638 L2CAP_EXT_CTRL_REQSEQ_SHIFT;
640 return (ctrl & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT;
643 static inline __u32 __set_reqseq(struct l2cap_chan *chan, __u32 reqseq)
645 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
646 return (reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT) &
647 L2CAP_EXT_CTRL_REQSEQ;
649 return (reqseq << L2CAP_CTRL_REQSEQ_SHIFT) & L2CAP_CTRL_REQSEQ;
652 static inline __u16 __get_txseq(struct l2cap_chan *chan, __u32 ctrl)
654 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
655 return (ctrl & L2CAP_EXT_CTRL_TXSEQ) >>
656 L2CAP_EXT_CTRL_TXSEQ_SHIFT;
658 return (ctrl & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT;
661 static inline __u32 __set_txseq(struct l2cap_chan *chan, __u32 txseq)
663 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
664 return (txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT) &
665 L2CAP_EXT_CTRL_TXSEQ;
667 return (txseq << L2CAP_CTRL_TXSEQ_SHIFT) & L2CAP_CTRL_TXSEQ;
670 static inline bool __is_sframe(struct l2cap_chan *chan, __u32 ctrl)
672 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
673 return ctrl & L2CAP_EXT_CTRL_FRAME_TYPE;
675 return ctrl & L2CAP_CTRL_FRAME_TYPE;
678 static inline __u32 __set_sframe(struct l2cap_chan *chan)
680 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
681 return L2CAP_EXT_CTRL_FRAME_TYPE;
683 return L2CAP_CTRL_FRAME_TYPE;
686 static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl)
688 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
689 return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
691 return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
694 static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar)
696 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
697 return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR;
699 return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR;
702 static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl)
704 return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START;
707 static inline __u32 __get_sar_mask(struct l2cap_chan *chan)
709 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
710 return L2CAP_EXT_CTRL_SAR;
712 return L2CAP_CTRL_SAR;
715 static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl)
717 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
718 return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >>
719 L2CAP_EXT_CTRL_SUPER_SHIFT;
721 return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;
724 static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super)
726 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
727 return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) &
728 L2CAP_EXT_CTRL_SUPERVISE;
730 return (super << L2CAP_CTRL_SUPER_SHIFT) &
731 L2CAP_CTRL_SUPERVISE;
734 static inline __u32 __set_ctrl_final(struct l2cap_chan *chan)
736 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
737 return L2CAP_EXT_CTRL_FINAL;
739 return L2CAP_CTRL_FINAL;
742 static inline bool __is_ctrl_final(struct l2cap_chan *chan, __u32 ctrl)
744 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
745 return ctrl & L2CAP_EXT_CTRL_FINAL;
747 return ctrl & L2CAP_CTRL_FINAL;
750 static inline __u32 __set_ctrl_poll(struct l2cap_chan *chan)
752 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
753 return L2CAP_EXT_CTRL_POLL;
755 return L2CAP_CTRL_POLL;
758 static inline bool __is_ctrl_poll(struct l2cap_chan *chan, __u32 ctrl)
760 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
761 return ctrl & L2CAP_EXT_CTRL_POLL;
763 return ctrl & L2CAP_CTRL_POLL;
766 static inline __u32 __get_control(struct l2cap_chan *chan, void *p)
768 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
769 return get_unaligned_le32(p);
771 return get_unaligned_le16(p);
774 static inline void __put_control(struct l2cap_chan *chan, __u32 control,
777 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
778 return put_unaligned_le32(control, p);
780 return put_unaligned_le16(control, p);
783 static inline __u8 __ctrl_size(struct l2cap_chan *chan)
785 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
786 return L2CAP_EXT_HDR_SIZE - L2CAP_HDR_SIZE;
788 return L2CAP_ENH_HDR_SIZE - L2CAP_HDR_SIZE;
791 extern int disable_ertm;
792 extern int enable_hs;
794 int l2cap_init_sockets(void);
795 void l2cap_cleanup_sockets(void);
797 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
798 int __l2cap_wait_ack(struct sock *sk);
800 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
801 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
803 struct l2cap_chan *l2cap_chan_create(struct sock *sk);
804 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
805 void l2cap_chan_destroy(struct l2cap_chan *chan);
806 int l2cap_chan_connect(struct l2cap_chan *chan);
807 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
809 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
811 #endif /* __L2CAP_H */