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_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 */
54 /* L2CAP socket address */
56 sa_family_t l2_family;
62 /* L2CAP socket options */
63 #define L2CAP_OPTIONS 0x01
64 struct l2cap_options {
74 #define L2CAP_CONNINFO 0x02
75 struct l2cap_conninfo {
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
88 /* L2CAP command codes */
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
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
106 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
107 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
109 /* L2CAP extended feature mask */
110 #define L2CAP_FEAT_FLOWCTL 0x00000001
111 #define L2CAP_FEAT_RETRANS 0x00000002
112 #define L2CAP_FEAT_BIDIR_QOS 0x00000004
113 #define L2CAP_FEAT_ERTM 0x00000008
114 #define L2CAP_FEAT_STREAMING 0x00000010
115 #define L2CAP_FEAT_FCS 0x00000020
116 #define L2CAP_FEAT_EXT_FLOW 0x00000040
117 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
118 #define L2CAP_FEAT_EXT_WINDOW 0x00000100
119 #define L2CAP_FEAT_UCD 0x00000200
121 /* L2CAP checksum option */
122 #define L2CAP_FCS_NONE 0x00
123 #define L2CAP_FCS_CRC16 0x01
125 /* L2CAP fixed channels */
126 #define L2CAP_FC_L2CAP 0x02
127 #define L2CAP_FC_A2MP 0x08
129 /* L2CAP Control Field bit masks */
130 #define L2CAP_CTRL_SAR 0xC000
131 #define L2CAP_CTRL_REQSEQ 0x3F00
132 #define L2CAP_CTRL_TXSEQ 0x007E
133 #define L2CAP_CTRL_SUPERVISE 0x000C
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 */
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
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
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 */
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
160 /* L2CAP Supervisory Function */
161 #define L2CAP_SUPER_RR 0x00
162 #define L2CAP_SUPER_REJ 0x01
163 #define L2CAP_SUPER_RNR 0x02
164 #define L2CAP_SUPER_SREJ 0x03
166 /* L2CAP Segmentation and Reassembly */
167 #define L2CAP_SAR_UNSEGMENTED 0x00
168 #define L2CAP_SAR_START 0x01
169 #define L2CAP_SAR_END 0x02
170 #define L2CAP_SAR_CONTINUE 0x03
172 /* L2CAP Command rej. reasons */
173 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
174 #define L2CAP_REJ_MTU_EXCEEDED 0x0001
175 #define L2CAP_REJ_INVALID_CID 0x0002
177 /* L2CAP structures */
182 #define L2CAP_HDR_SIZE 4
183 #define L2CAP_ENH_HDR_SIZE 6
184 #define L2CAP_EXT_HDR_SIZE 8
186 #define L2CAP_FCS_SIZE 2
187 #define L2CAP_SDULEN_SIZE 2
188 #define L2CAP_PSMLEN_SIZE 2
190 struct l2cap_cmd_hdr {
195 #define L2CAP_CMD_HDR_SIZE 4
197 struct l2cap_cmd_rej_unk {
201 struct l2cap_cmd_rej_mtu {
206 struct l2cap_cmd_rej_cid {
212 struct l2cap_conn_req {
217 struct l2cap_conn_rsp {
224 /* channel indentifier */
225 #define L2CAP_CID_SIGNALING 0x0001
226 #define L2CAP_CID_CONN_LESS 0x0002
227 #define L2CAP_CID_LE_DATA 0x0004
228 #define L2CAP_CID_LE_SIGNALING 0x0005
229 #define L2CAP_CID_SMP 0x0006
230 #define L2CAP_CID_DYN_START 0x0040
231 #define L2CAP_CID_DYN_END 0xffff
233 /* connect/create channel results */
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
239 #define L2CAP_CR_BAD_AMP 0x0005
241 /* connect/create channel status */
242 #define L2CAP_CS_NO_INFO 0x0000
243 #define L2CAP_CS_AUTHEN_PEND 0x0001
244 #define L2CAP_CS_AUTHOR_PEND 0x0002
246 struct l2cap_conf_req {
252 struct l2cap_conf_rsp {
259 #define L2CAP_CONF_SUCCESS 0x0000
260 #define L2CAP_CONF_UNACCEPT 0x0001
261 #define L2CAP_CONF_REJECT 0x0002
262 #define L2CAP_CONF_UNKNOWN 0x0003
263 #define L2CAP_CONF_PENDING 0x0004
264 #define L2CAP_CONF_EFS_REJECT 0x0005
266 struct l2cap_conf_opt {
271 #define L2CAP_CONF_OPT_SIZE 2
273 #define L2CAP_CONF_HINT 0x80
274 #define L2CAP_CONF_MASK 0x7f
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
280 #define L2CAP_CONF_FCS 0x05
281 #define L2CAP_CONF_EFS 0x06
282 #define L2CAP_CONF_EWS 0x07
284 #define L2CAP_CONF_MAX_SIZE 22
286 struct l2cap_conf_rfc {
290 __le16 retrans_timeout;
291 __le16 monitor_timeout;
295 #define L2CAP_MODE_BASIC 0x00
296 #define L2CAP_MODE_RETRANS 0x01
297 #define L2CAP_MODE_FLOWCTL 0x02
298 #define L2CAP_MODE_ERTM 0x03
299 #define L2CAP_MODE_STREAMING 0x04
301 struct l2cap_conf_efs {
310 #define L2CAP_SERV_NOTRAFIC 0x00
311 #define L2CAP_SERV_BESTEFFORT 0x01
312 #define L2CAP_SERV_GUARANTEED 0x02
314 #define L2CAP_BESTEFFORT_ID 0x01
316 struct l2cap_disconn_req {
321 struct l2cap_disconn_rsp {
326 struct l2cap_info_req {
330 struct l2cap_info_rsp {
336 struct l2cap_create_chan_req {
342 struct l2cap_create_chan_rsp {
349 struct l2cap_move_chan_req {
354 struct l2cap_move_chan_rsp {
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
367 struct l2cap_move_chan_cfm {
372 #define L2CAP_MC_CONFIRMED 0x0000
373 #define L2CAP_MC_UNCONFIRMED 0x0001
375 struct l2cap_move_chan_cfm_rsp {
380 #define L2CAP_IT_CL_MTU 0x0001
381 #define L2CAP_IT_FEAT_MASK 0x0002
382 #define L2CAP_IT_FIXED_CHAN 0x0003
385 #define L2CAP_IR_SUCCESS 0x0000
386 #define L2CAP_IR_NOTSUPP 0x0001
388 struct l2cap_conn_param_update_req {
392 __le16 to_multiplier;
395 struct l2cap_conn_param_update_rsp {
399 /* Connection Parameters result */
400 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000
401 #define L2CAP_CONN_PARAM_REJECTED 0x0001
403 /* ----- L2CAP channels and connections ----- */
406 struct list_head list;
412 struct l2cap_conn *conn;
445 __u16 retrans_timeout;
446 __u16 monitor_timeout;
449 unsigned long conf_state;
450 unsigned long conn_state;
454 __u16 expected_ack_seq;
455 __u16 expected_tx_seq;
457 __u16 buffer_seq_srej;
458 __u16 srej_save_reqseq;
460 __u16 unacked_frames;
465 struct sk_buff *sdu_last_frag;
474 __u32 local_sdu_itime;
476 __u32 local_flush_to;
481 __u32 remote_sdu_itime;
482 __u32 remote_acc_lat;
483 __u32 remote_flush_to;
485 struct timer_list chan_timer;
486 struct timer_list retrans_timer;
487 struct timer_list monitor_timer;
488 struct timer_list ack_timer;
489 struct sk_buff *tx_send_head;
490 struct sk_buff_head tx_q;
491 struct sk_buff_head srej_q;
492 struct list_head srej_l;
494 struct list_head list;
495 struct list_head global_l;
498 struct l2cap_ops *ops;
504 struct l2cap_chan *(*new_connection) (void *data);
505 int (*recv) (void *data, struct sk_buff *skb);
506 void (*close) (void *data);
507 void (*state_change) (void *data, int state);
511 struct hci_conn *hcon;
512 struct hci_chan *hchan;
524 struct timer_list info_timer;
528 struct sk_buff *rx_skb;
534 struct timer_list security_timer;
535 struct smp_chan *smp_chan;
537 struct list_head chan_l;
541 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
542 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
543 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
545 #define L2CAP_CHAN_RAW 1
546 #define L2CAP_CHAN_CONN_LESS 2
547 #define L2CAP_CHAN_CONN_ORIENTED 3
549 /* ----- L2CAP socket info ----- */
550 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
554 struct l2cap_chan *chan;
555 struct sk_buff *rx_busy_skb;
572 #define L2CAP_CONF_MAX_CONF_REQ 2
573 #define L2CAP_CONF_MAX_CONF_RSP 2
587 /* Definitions for flags in l2cap_chan */
597 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
598 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
599 #define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
600 L2CAP_DEFAULT_RETRANS_TO);
601 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
602 #define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
603 L2CAP_DEFAULT_MONITOR_TO);
604 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
605 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
606 L2CAP_DEFAULT_ACK_TO);
607 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
609 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
613 offset = (seq1 - seq2) % (chan->tx_win_max + 1);
615 offset += (chan->tx_win_max + 1);
620 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
622 return (seq + 1) % (chan->tx_win_max + 1);
625 static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
629 sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
634 return sub == ch->remote_tx_win;
637 static inline __u16 __get_reqseq(struct l2cap_chan *chan, __u32 ctrl)
639 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
640 return (ctrl & L2CAP_EXT_CTRL_REQSEQ) >>
641 L2CAP_EXT_CTRL_REQSEQ_SHIFT;
643 return (ctrl & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT;
646 static inline __u32 __set_reqseq(struct l2cap_chan *chan, __u32 reqseq)
648 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
649 return (reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT) &
650 L2CAP_EXT_CTRL_REQSEQ;
652 return (reqseq << L2CAP_CTRL_REQSEQ_SHIFT) & L2CAP_CTRL_REQSEQ;
655 static inline __u16 __get_txseq(struct l2cap_chan *chan, __u32 ctrl)
657 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
658 return (ctrl & L2CAP_EXT_CTRL_TXSEQ) >>
659 L2CAP_EXT_CTRL_TXSEQ_SHIFT;
661 return (ctrl & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT;
664 static inline __u32 __set_txseq(struct l2cap_chan *chan, __u32 txseq)
666 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
667 return (txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT) &
668 L2CAP_EXT_CTRL_TXSEQ;
670 return (txseq << L2CAP_CTRL_TXSEQ_SHIFT) & L2CAP_CTRL_TXSEQ;
673 static inline bool __is_sframe(struct l2cap_chan *chan, __u32 ctrl)
675 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
676 return ctrl & L2CAP_EXT_CTRL_FRAME_TYPE;
678 return ctrl & L2CAP_CTRL_FRAME_TYPE;
681 static inline __u32 __set_sframe(struct l2cap_chan *chan)
683 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
684 return L2CAP_EXT_CTRL_FRAME_TYPE;
686 return L2CAP_CTRL_FRAME_TYPE;
689 static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl)
691 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
692 return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
694 return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
697 static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar)
699 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
700 return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR;
702 return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR;
705 static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl)
707 return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START;
710 static inline __u32 __get_sar_mask(struct l2cap_chan *chan)
712 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
713 return L2CAP_EXT_CTRL_SAR;
715 return L2CAP_CTRL_SAR;
718 static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl)
720 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
721 return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >>
722 L2CAP_EXT_CTRL_SUPER_SHIFT;
724 return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;
727 static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super)
729 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
730 return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) &
731 L2CAP_EXT_CTRL_SUPERVISE;
733 return (super << L2CAP_CTRL_SUPER_SHIFT) &
734 L2CAP_CTRL_SUPERVISE;
737 static inline __u32 __set_ctrl_final(struct l2cap_chan *chan)
739 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
740 return L2CAP_EXT_CTRL_FINAL;
742 return L2CAP_CTRL_FINAL;
745 static inline bool __is_ctrl_final(struct l2cap_chan *chan, __u32 ctrl)
747 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
748 return ctrl & L2CAP_EXT_CTRL_FINAL;
750 return ctrl & L2CAP_CTRL_FINAL;
753 static inline __u32 __set_ctrl_poll(struct l2cap_chan *chan)
755 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
756 return L2CAP_EXT_CTRL_POLL;
758 return L2CAP_CTRL_POLL;
761 static inline bool __is_ctrl_poll(struct l2cap_chan *chan, __u32 ctrl)
763 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
764 return ctrl & L2CAP_EXT_CTRL_POLL;
766 return ctrl & L2CAP_CTRL_POLL;
769 static inline __u32 __get_control(struct l2cap_chan *chan, void *p)
771 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
772 return get_unaligned_le32(p);
774 return get_unaligned_le16(p);
777 static inline void __put_control(struct l2cap_chan *chan, __u32 control,
780 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
781 return put_unaligned_le32(control, p);
783 return put_unaligned_le16(control, p);
786 static inline __u8 __ctrl_size(struct l2cap_chan *chan)
788 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
789 return L2CAP_EXT_HDR_SIZE - L2CAP_HDR_SIZE;
791 return L2CAP_ENH_HDR_SIZE - L2CAP_HDR_SIZE;
794 extern int disable_ertm;
795 extern int enable_hs;
797 int l2cap_init_sockets(void);
798 void l2cap_cleanup_sockets(void);
800 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
801 int __l2cap_wait_ack(struct sock *sk);
803 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
804 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
806 struct l2cap_chan *l2cap_chan_create(struct sock *sk);
807 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
808 void l2cap_chan_destroy(struct l2cap_chan *chan);
809 int l2cap_chan_connect(struct l2cap_chan *chan);
810 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
812 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
814 #endif /* __L2CAP_H */