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_EFS_DEFAULT_FLUSH_TO 0xFFFFFFFF
37 #define L2CAP_DEFAULT_TX_WINDOW 63
38 #define L2CAP_DEFAULT_EXT_WINDOW 0x3FFF
39 #define L2CAP_DEFAULT_MAX_TX 3
40 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */
41 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
42 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1492 /* Sized for AMP packet */
43 #define L2CAP_DEFAULT_ACK_TO 200
44 #define L2CAP_DEFAULT_MAX_SDU_SIZE 0xFFFF
45 #define L2CAP_DEFAULT_SDU_ITIME 0xFFFFFFFF
46 #define L2CAP_DEFAULT_ACC_LAT 0xFFFFFFFF
47 #define L2CAP_BREDR_MAX_PAYLOAD 1019 /* 3-DH5 packet */
48 #define L2CAP_LE_MIN_MTU 23
50 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100)
51 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000)
52 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000)
53 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000)
54 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000)
55 #define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000)
56 #define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000)
58 #define L2CAP_A2MP_DEFAULT_MTU 670
60 /* L2CAP socket address */
62 sa_family_t l2_family;
69 /* L2CAP socket options */
70 #define L2CAP_OPTIONS 0x01
71 struct l2cap_options {
81 #define L2CAP_CONNINFO 0x02
82 struct l2cap_conninfo {
88 #define L2CAP_LM_MASTER 0x0001
89 #define L2CAP_LM_AUTH 0x0002
90 #define L2CAP_LM_ENCRYPT 0x0004
91 #define L2CAP_LM_TRUSTED 0x0008
92 #define L2CAP_LM_RELIABLE 0x0010
93 #define L2CAP_LM_SECURE 0x0020
95 /* L2CAP command codes */
96 #define L2CAP_COMMAND_REJ 0x01
97 #define L2CAP_CONN_REQ 0x02
98 #define L2CAP_CONN_RSP 0x03
99 #define L2CAP_CONF_REQ 0x04
100 #define L2CAP_CONF_RSP 0x05
101 #define L2CAP_DISCONN_REQ 0x06
102 #define L2CAP_DISCONN_RSP 0x07
103 #define L2CAP_ECHO_REQ 0x08
104 #define L2CAP_ECHO_RSP 0x09
105 #define L2CAP_INFO_REQ 0x0a
106 #define L2CAP_INFO_RSP 0x0b
107 #define L2CAP_CREATE_CHAN_REQ 0x0c
108 #define L2CAP_CREATE_CHAN_RSP 0x0d
109 #define L2CAP_MOVE_CHAN_REQ 0x0e
110 #define L2CAP_MOVE_CHAN_RSP 0x0f
111 #define L2CAP_MOVE_CHAN_CFM 0x10
112 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11
113 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
114 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
116 /* L2CAP extended feature mask */
117 #define L2CAP_FEAT_FLOWCTL 0x00000001
118 #define L2CAP_FEAT_RETRANS 0x00000002
119 #define L2CAP_FEAT_BIDIR_QOS 0x00000004
120 #define L2CAP_FEAT_ERTM 0x00000008
121 #define L2CAP_FEAT_STREAMING 0x00000010
122 #define L2CAP_FEAT_FCS 0x00000020
123 #define L2CAP_FEAT_EXT_FLOW 0x00000040
124 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
125 #define L2CAP_FEAT_EXT_WINDOW 0x00000100
126 #define L2CAP_FEAT_UCD 0x00000200
128 /* L2CAP checksum option */
129 #define L2CAP_FCS_NONE 0x00
130 #define L2CAP_FCS_CRC16 0x01
132 /* L2CAP fixed channels */
133 #define L2CAP_FC_L2CAP 0x02
134 #define L2CAP_FC_CONNLESS 0x04
135 #define L2CAP_FC_A2MP 0x08
137 /* L2CAP Control Field bit masks */
138 #define L2CAP_CTRL_SAR 0xC000
139 #define L2CAP_CTRL_REQSEQ 0x3F00
140 #define L2CAP_CTRL_TXSEQ 0x007E
141 #define L2CAP_CTRL_SUPERVISE 0x000C
143 #define L2CAP_CTRL_RETRANS 0x0080
144 #define L2CAP_CTRL_FINAL 0x0080
145 #define L2CAP_CTRL_POLL 0x0010
146 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
148 #define L2CAP_CTRL_TXSEQ_SHIFT 1
149 #define L2CAP_CTRL_SUPER_SHIFT 2
150 #define L2CAP_CTRL_POLL_SHIFT 4
151 #define L2CAP_CTRL_FINAL_SHIFT 7
152 #define L2CAP_CTRL_REQSEQ_SHIFT 8
153 #define L2CAP_CTRL_SAR_SHIFT 14
155 /* L2CAP Extended Control Field bit mask */
156 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
157 #define L2CAP_EXT_CTRL_SAR 0x00030000
158 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
159 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
161 #define L2CAP_EXT_CTRL_POLL 0x00040000
162 #define L2CAP_EXT_CTRL_FINAL 0x00000002
163 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
165 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1
166 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
167 #define L2CAP_EXT_CTRL_SAR_SHIFT 16
168 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16
169 #define L2CAP_EXT_CTRL_POLL_SHIFT 18
170 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
172 /* L2CAP Supervisory Function */
173 #define L2CAP_SUPER_RR 0x00
174 #define L2CAP_SUPER_REJ 0x01
175 #define L2CAP_SUPER_RNR 0x02
176 #define L2CAP_SUPER_SREJ 0x03
178 /* L2CAP Segmentation and Reassembly */
179 #define L2CAP_SAR_UNSEGMENTED 0x00
180 #define L2CAP_SAR_START 0x01
181 #define L2CAP_SAR_END 0x02
182 #define L2CAP_SAR_CONTINUE 0x03
184 /* L2CAP Command rej. reasons */
185 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
186 #define L2CAP_REJ_MTU_EXCEEDED 0x0001
187 #define L2CAP_REJ_INVALID_CID 0x0002
189 /* L2CAP structures */
194 #define L2CAP_HDR_SIZE 4
195 #define L2CAP_ENH_HDR_SIZE 6
196 #define L2CAP_EXT_HDR_SIZE 8
198 #define L2CAP_FCS_SIZE 2
199 #define L2CAP_SDULEN_SIZE 2
200 #define L2CAP_PSMLEN_SIZE 2
201 #define L2CAP_ENH_CTRL_SIZE 2
202 #define L2CAP_EXT_CTRL_SIZE 4
204 struct l2cap_cmd_hdr {
209 #define L2CAP_CMD_HDR_SIZE 4
211 struct l2cap_cmd_rej_unk {
215 struct l2cap_cmd_rej_mtu {
220 struct l2cap_cmd_rej_cid {
226 struct l2cap_conn_req {
231 struct l2cap_conn_rsp {
238 /* protocol/service multiplexer (PSM) */
239 #define L2CAP_PSM_SDP 0x0001
240 #define L2CAP_PSM_RFCOMM 0x0003
241 #define L2CAP_PSM_3DSP 0x0021
243 /* channel indentifier */
244 #define L2CAP_CID_SIGNALING 0x0001
245 #define L2CAP_CID_CONN_LESS 0x0002
246 #define L2CAP_CID_A2MP 0x0003
247 #define L2CAP_CID_ATT 0x0004
248 #define L2CAP_CID_LE_SIGNALING 0x0005
249 #define L2CAP_CID_SMP 0x0006
250 #define L2CAP_CID_DYN_START 0x0040
251 #define L2CAP_CID_DYN_END 0xffff
253 /* connect/create channel results */
254 #define L2CAP_CR_SUCCESS 0x0000
255 #define L2CAP_CR_PEND 0x0001
256 #define L2CAP_CR_BAD_PSM 0x0002
257 #define L2CAP_CR_SEC_BLOCK 0x0003
258 #define L2CAP_CR_NO_MEM 0x0004
259 #define L2CAP_CR_BAD_AMP 0x0005
261 /* connect/create channel status */
262 #define L2CAP_CS_NO_INFO 0x0000
263 #define L2CAP_CS_AUTHEN_PEND 0x0001
264 #define L2CAP_CS_AUTHOR_PEND 0x0002
266 struct l2cap_conf_req {
272 struct l2cap_conf_rsp {
279 #define L2CAP_CONF_SUCCESS 0x0000
280 #define L2CAP_CONF_UNACCEPT 0x0001
281 #define L2CAP_CONF_REJECT 0x0002
282 #define L2CAP_CONF_UNKNOWN 0x0003
283 #define L2CAP_CONF_PENDING 0x0004
284 #define L2CAP_CONF_EFS_REJECT 0x0005
286 /* configuration req/rsp continuation flag */
287 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001
289 struct l2cap_conf_opt {
294 #define L2CAP_CONF_OPT_SIZE 2
296 #define L2CAP_CONF_HINT 0x80
297 #define L2CAP_CONF_MASK 0x7f
299 #define L2CAP_CONF_MTU 0x01
300 #define L2CAP_CONF_FLUSH_TO 0x02
301 #define L2CAP_CONF_QOS 0x03
302 #define L2CAP_CONF_RFC 0x04
303 #define L2CAP_CONF_FCS 0x05
304 #define L2CAP_CONF_EFS 0x06
305 #define L2CAP_CONF_EWS 0x07
307 #define L2CAP_CONF_MAX_SIZE 22
309 struct l2cap_conf_rfc {
313 __le16 retrans_timeout;
314 __le16 monitor_timeout;
318 #define L2CAP_MODE_BASIC 0x00
319 #define L2CAP_MODE_RETRANS 0x01
320 #define L2CAP_MODE_FLOWCTL 0x02
321 #define L2CAP_MODE_ERTM 0x03
322 #define L2CAP_MODE_STREAMING 0x04
324 struct l2cap_conf_efs {
333 #define L2CAP_SERV_NOTRAFIC 0x00
334 #define L2CAP_SERV_BESTEFFORT 0x01
335 #define L2CAP_SERV_GUARANTEED 0x02
337 #define L2CAP_BESTEFFORT_ID 0x01
339 struct l2cap_disconn_req {
344 struct l2cap_disconn_rsp {
349 struct l2cap_info_req {
353 struct l2cap_info_rsp {
359 struct l2cap_create_chan_req {
365 struct l2cap_create_chan_rsp {
372 struct l2cap_move_chan_req {
377 struct l2cap_move_chan_rsp {
382 #define L2CAP_MR_SUCCESS 0x0000
383 #define L2CAP_MR_PEND 0x0001
384 #define L2CAP_MR_BAD_ID 0x0002
385 #define L2CAP_MR_SAME_ID 0x0003
386 #define L2CAP_MR_NOT_SUPP 0x0004
387 #define L2CAP_MR_COLLISION 0x0005
388 #define L2CAP_MR_NOT_ALLOWED 0x0006
390 struct l2cap_move_chan_cfm {
395 #define L2CAP_MC_CONFIRMED 0x0000
396 #define L2CAP_MC_UNCONFIRMED 0x0001
398 struct l2cap_move_chan_cfm_rsp {
403 #define L2CAP_IT_CL_MTU 0x0001
404 #define L2CAP_IT_FEAT_MASK 0x0002
405 #define L2CAP_IT_FIXED_CHAN 0x0003
408 #define L2CAP_IR_SUCCESS 0x0000
409 #define L2CAP_IR_NOTSUPP 0x0001
411 struct l2cap_conn_param_update_req {
415 __le16 to_multiplier;
418 struct l2cap_conn_param_update_rsp {
422 /* Connection Parameters result */
423 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000
424 #define L2CAP_CONN_PARAM_REJECTED 0x0001
426 /* ----- L2CAP channels and connections ----- */
427 struct l2cap_seq_list {
434 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF
435 #define L2CAP_SEQ_LIST_TAIL 0x8000
440 struct l2cap_conn *conn;
441 struct hci_conn *hs_hcon;
442 struct hci_chan *hs_hchan;
478 __u16 retrans_timeout;
479 __u16 monitor_timeout;
485 unsigned long conf_state;
486 unsigned long conn_state;
496 __u16 expected_ack_seq;
497 __u16 expected_tx_seq;
499 __u16 srej_save_reqseq;
500 __u16 last_acked_seq;
502 __u16 unacked_frames;
506 struct sk_buff *sdu_last_frag;
515 __u32 local_sdu_itime;
517 __u32 local_flush_to;
522 __u32 remote_sdu_itime;
523 __u32 remote_acc_lat;
524 __u32 remote_flush_to;
526 struct delayed_work chan_timer;
527 struct delayed_work retrans_timer;
528 struct delayed_work monitor_timer;
529 struct delayed_work ack_timer;
531 struct sk_buff *tx_send_head;
532 struct sk_buff_head tx_q;
533 struct sk_buff_head srej_q;
534 struct l2cap_seq_list srej_list;
535 struct l2cap_seq_list retrans_list;
537 struct list_head list;
538 struct list_head global_l;
541 struct l2cap_ops *ops;
548 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan);
549 int (*recv) (struct l2cap_chan * chan,
550 struct sk_buff *skb);
551 void (*teardown) (struct l2cap_chan *chan, int err);
552 void (*close) (struct l2cap_chan *chan);
553 void (*state_change) (struct l2cap_chan *chan,
555 void (*ready) (struct l2cap_chan *chan);
556 void (*defer) (struct l2cap_chan *chan);
557 void (*resume) (struct l2cap_chan *chan);
558 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
559 unsigned long len, int nb);
563 struct hci_conn *hcon;
564 struct hci_chan *hchan;
569 __u8 fixed_chan_mask;
575 struct delayed_work info_timer;
579 struct sk_buff *rx_skb;
585 struct delayed_work security_timer;
586 struct smp_chan *smp_chan;
588 struct list_head chan_l;
589 struct mutex chan_lock;
591 struct list_head users;
595 struct list_head list;
596 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user);
597 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user);
600 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
601 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
602 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
604 #define L2CAP_CHAN_RAW 1
605 #define L2CAP_CHAN_CONN_LESS 2
606 #define L2CAP_CHAN_CONN_ORIENTED 3
607 #define L2CAP_CHAN_CONN_FIX_A2MP 4
609 /* ----- L2CAP socket info ----- */
610 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
614 struct l2cap_chan *chan;
615 struct sk_buff *rx_busy_skb;
633 #define L2CAP_CONF_MAX_CONF_REQ 2
634 #define L2CAP_CONF_MAX_CONF_RSP 2
648 /* Definitions for flags in l2cap_chan */
661 L2CAP_TX_STATE_WAIT_F,
666 L2CAP_RX_STATE_SREJ_SENT,
668 L2CAP_RX_STATE_WAIT_P,
669 L2CAP_RX_STATE_WAIT_F,
673 L2CAP_TXSEQ_EXPECTED,
674 L2CAP_TXSEQ_EXPECTED_SREJ,
675 L2CAP_TXSEQ_UNEXPECTED,
676 L2CAP_TXSEQ_UNEXPECTED_SREJ,
677 L2CAP_TXSEQ_DUPLICATE,
678 L2CAP_TXSEQ_DUPLICATE_SREJ,
680 L2CAP_TXSEQ_INVALID_IGNORE,
684 L2CAP_EV_DATA_REQUEST,
685 L2CAP_EV_LOCAL_BUSY_DETECTED,
686 L2CAP_EV_LOCAL_BUSY_CLEAR,
687 L2CAP_EV_RECV_REQSEQ_AND_FBIT,
691 L2CAP_EV_EXPLICIT_POLL,
692 L2CAP_EV_RECV_IFRAME,
701 L2CAP_MOVE_ROLE_NONE,
702 L2CAP_MOVE_ROLE_INITIATOR,
703 L2CAP_MOVE_ROLE_RESPONDER,
710 L2CAP_MOVE_WAIT_RSP_SUCCESS,
711 L2CAP_MOVE_WAIT_CONFIRM,
712 L2CAP_MOVE_WAIT_CONFIRM_RSP,
713 L2CAP_MOVE_WAIT_LOGICAL_COMP,
714 L2CAP_MOVE_WAIT_LOGICAL_CFM,
715 L2CAP_MOVE_WAIT_LOCAL_BUSY,
716 L2CAP_MOVE_WAIT_PREPARE,
719 void l2cap_chan_hold(struct l2cap_chan *c);
720 void l2cap_chan_put(struct l2cap_chan *c);
722 static inline void l2cap_chan_lock(struct l2cap_chan *chan)
724 mutex_lock(&chan->lock);
727 static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
729 mutex_unlock(&chan->lock);
732 static inline void l2cap_set_timer(struct l2cap_chan *chan,
733 struct delayed_work *work, long timeout)
735 BT_DBG("chan %p state %s timeout %ld", chan,
736 state_to_string(chan->state), timeout);
738 /* If delayed work cancelled do not hold(chan)
739 since it is already done with previous set_timer */
740 if (!cancel_delayed_work(work))
741 l2cap_chan_hold(chan);
743 schedule_delayed_work(work, timeout);
746 static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
747 struct delayed_work *work)
751 /* put(chan) if delayed work cancelled otherwise it
752 is done in delayed work function */
753 ret = cancel_delayed_work(work);
755 l2cap_chan_put(chan);
760 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
761 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
762 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
763 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
764 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
765 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
766 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
768 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
773 return chan->tx_win_max + 1 - seq2 + seq1;
776 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
778 return (seq + 1) % (chan->tx_win_max + 1);
781 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
786 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
790 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
794 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
798 extern bool disable_ertm;
800 int l2cap_init_sockets(void);
801 void l2cap_cleanup_sockets(void);
802 bool l2cap_is_socket(struct socket *sock);
804 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
805 int __l2cap_wait_ack(struct sock *sk);
807 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
808 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
810 struct l2cap_chan *l2cap_chan_create(void);
811 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
812 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
813 bdaddr_t *dst, u8 dst_type);
814 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
816 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
817 int l2cap_chan_check_security(struct l2cap_chan *chan);
818 void l2cap_chan_set_defaults(struct l2cap_chan *chan);
819 int l2cap_ertm_init(struct l2cap_chan *chan);
820 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
821 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
822 void l2cap_chan_del(struct l2cap_chan *chan, int err);
823 void l2cap_send_conn_req(struct l2cap_chan *chan);
824 void l2cap_move_start(struct l2cap_chan *chan);
825 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
827 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
829 void l2cap_conn_get(struct l2cap_conn *conn);
830 void l2cap_conn_put(struct l2cap_conn *conn);
832 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user);
833 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user);
835 #endif /* __L2CAP_H */