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 delayed_work chan_timer;
486 struct delayed_work retrans_timer;
487 struct delayed_work monitor_timer;
488 struct delayed_work ack_timer;
490 struct sk_buff *tx_send_head;
491 struct sk_buff_head tx_q;
492 struct sk_buff_head srej_q;
493 struct list_head srej_l;
495 struct list_head list;
496 struct list_head global_l;
499 struct l2cap_ops *ops;
505 struct l2cap_chan *(*new_connection) (void *data);
506 int (*recv) (void *data, struct sk_buff *skb);
507 void (*close) (void *data);
508 void (*state_change) (void *data, int state);
512 struct hci_conn *hcon;
513 struct hci_chan *hchan;
525 struct delayed_work info_work;
529 struct sk_buff *rx_skb;
535 struct timer_list security_timer;
536 struct smp_chan *smp_chan;
538 struct list_head chan_l;
539 struct mutex chan_lock;
542 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
543 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
544 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
546 #define L2CAP_CHAN_RAW 1
547 #define L2CAP_CHAN_CONN_LESS 2
548 #define L2CAP_CHAN_CONN_ORIENTED 3
550 /* ----- L2CAP socket info ----- */
551 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
555 struct l2cap_chan *chan;
556 struct sk_buff *rx_busy_skb;
573 #define L2CAP_CONF_MAX_CONF_REQ 2
574 #define L2CAP_CONF_MAX_CONF_RSP 2
588 /* Definitions for flags in l2cap_chan */
598 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
599 #define __clear_chan_timer(c) l2cap_clear_timer(&c->chan_timer)
600 #define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
601 L2CAP_DEFAULT_RETRANS_TO);
602 #define __clear_retrans_timer(c) l2cap_clear_timer(&c->retrans_timer)
603 #define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
604 L2CAP_DEFAULT_MONITOR_TO);
605 #define __clear_monitor_timer(c) l2cap_clear_timer(&c->monitor_timer)
606 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
607 L2CAP_DEFAULT_ACK_TO);
608 #define __clear_ack_timer(c) l2cap_clear_timer(&c->ack_timer)
610 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
614 offset = (seq1 - seq2) % (chan->tx_win_max + 1);
616 offset += (chan->tx_win_max + 1);
621 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
623 return (seq + 1) % (chan->tx_win_max + 1);
626 static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
630 sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
635 return sub == ch->remote_tx_win;
638 static inline __u16 __get_reqseq(struct l2cap_chan *chan, __u32 ctrl)
640 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
641 return (ctrl & L2CAP_EXT_CTRL_REQSEQ) >>
642 L2CAP_EXT_CTRL_REQSEQ_SHIFT;
644 return (ctrl & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT;
647 static inline __u32 __set_reqseq(struct l2cap_chan *chan, __u32 reqseq)
649 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
650 return (reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT) &
651 L2CAP_EXT_CTRL_REQSEQ;
653 return (reqseq << L2CAP_CTRL_REQSEQ_SHIFT) & L2CAP_CTRL_REQSEQ;
656 static inline __u16 __get_txseq(struct l2cap_chan *chan, __u32 ctrl)
658 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
659 return (ctrl & L2CAP_EXT_CTRL_TXSEQ) >>
660 L2CAP_EXT_CTRL_TXSEQ_SHIFT;
662 return (ctrl & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT;
665 static inline __u32 __set_txseq(struct l2cap_chan *chan, __u32 txseq)
667 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
668 return (txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT) &
669 L2CAP_EXT_CTRL_TXSEQ;
671 return (txseq << L2CAP_CTRL_TXSEQ_SHIFT) & L2CAP_CTRL_TXSEQ;
674 static inline bool __is_sframe(struct l2cap_chan *chan, __u32 ctrl)
676 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
677 return ctrl & L2CAP_EXT_CTRL_FRAME_TYPE;
679 return ctrl & L2CAP_CTRL_FRAME_TYPE;
682 static inline __u32 __set_sframe(struct l2cap_chan *chan)
684 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
685 return L2CAP_EXT_CTRL_FRAME_TYPE;
687 return L2CAP_CTRL_FRAME_TYPE;
690 static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl)
692 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
693 return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
695 return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
698 static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar)
700 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
701 return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR;
703 return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR;
706 static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl)
708 return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START;
711 static inline __u32 __get_sar_mask(struct l2cap_chan *chan)
713 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
714 return L2CAP_EXT_CTRL_SAR;
716 return L2CAP_CTRL_SAR;
719 static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl)
721 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
722 return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >>
723 L2CAP_EXT_CTRL_SUPER_SHIFT;
725 return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;
728 static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super)
730 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
731 return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) &
732 L2CAP_EXT_CTRL_SUPERVISE;
734 return (super << L2CAP_CTRL_SUPER_SHIFT) &
735 L2CAP_CTRL_SUPERVISE;
738 static inline __u32 __set_ctrl_final(struct l2cap_chan *chan)
740 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
741 return L2CAP_EXT_CTRL_FINAL;
743 return L2CAP_CTRL_FINAL;
746 static inline bool __is_ctrl_final(struct l2cap_chan *chan, __u32 ctrl)
748 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
749 return ctrl & L2CAP_EXT_CTRL_FINAL;
751 return ctrl & L2CAP_CTRL_FINAL;
754 static inline __u32 __set_ctrl_poll(struct l2cap_chan *chan)
756 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
757 return L2CAP_EXT_CTRL_POLL;
759 return L2CAP_CTRL_POLL;
762 static inline bool __is_ctrl_poll(struct l2cap_chan *chan, __u32 ctrl)
764 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
765 return ctrl & L2CAP_EXT_CTRL_POLL;
767 return ctrl & L2CAP_CTRL_POLL;
770 static inline __u32 __get_control(struct l2cap_chan *chan, void *p)
772 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
773 return get_unaligned_le32(p);
775 return get_unaligned_le16(p);
778 static inline void __put_control(struct l2cap_chan *chan, __u32 control,
781 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
782 return put_unaligned_le32(control, p);
784 return put_unaligned_le16(control, p);
787 static inline __u8 __ctrl_size(struct l2cap_chan *chan)
789 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
790 return L2CAP_EXT_HDR_SIZE - L2CAP_HDR_SIZE;
792 return L2CAP_ENH_HDR_SIZE - L2CAP_HDR_SIZE;
795 extern int disable_ertm;
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 inline int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
811 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
813 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
814 int l2cap_chan_check_security(struct l2cap_chan *chan);
816 #endif /* __L2CAP_H */