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
50 #define L2CAP_ECRED_CONN_SCID_MAX 5
52 #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100)
53 #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000)
54 #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000)
55 #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000)
56 #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000)
57 #define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000)
58 #define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000)
59 #define L2CAP_WAIT_ACK_POLL_PERIOD msecs_to_jiffies(200)
60 #define L2CAP_WAIT_ACK_TIMEOUT msecs_to_jiffies(10000)
62 #define L2CAP_A2MP_DEFAULT_MTU 670
64 /* L2CAP socket address */
66 sa_family_t l2_family;
73 /* L2CAP socket options */
74 #define L2CAP_OPTIONS 0x01
75 struct l2cap_options {
85 #define L2CAP_CONNINFO 0x02
86 struct l2cap_conninfo {
92 #define L2CAP_LM_MASTER 0x0001
93 #define L2CAP_LM_AUTH 0x0002
94 #define L2CAP_LM_ENCRYPT 0x0004
95 #define L2CAP_LM_TRUSTED 0x0008
96 #define L2CAP_LM_RELIABLE 0x0010
97 #define L2CAP_LM_SECURE 0x0020
98 #define L2CAP_LM_FIPS 0x0040
100 /* L2CAP command codes */
101 #define L2CAP_COMMAND_REJ 0x01
102 #define L2CAP_CONN_REQ 0x02
103 #define L2CAP_CONN_RSP 0x03
104 #define L2CAP_CONF_REQ 0x04
105 #define L2CAP_CONF_RSP 0x05
106 #define L2CAP_DISCONN_REQ 0x06
107 #define L2CAP_DISCONN_RSP 0x07
108 #define L2CAP_ECHO_REQ 0x08
109 #define L2CAP_ECHO_RSP 0x09
110 #define L2CAP_INFO_REQ 0x0a
111 #define L2CAP_INFO_RSP 0x0b
112 #define L2CAP_CREATE_CHAN_REQ 0x0c
113 #define L2CAP_CREATE_CHAN_RSP 0x0d
114 #define L2CAP_MOVE_CHAN_REQ 0x0e
115 #define L2CAP_MOVE_CHAN_RSP 0x0f
116 #define L2CAP_MOVE_CHAN_CFM 0x10
117 #define L2CAP_MOVE_CHAN_CFM_RSP 0x11
118 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
119 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
120 #define L2CAP_LE_CONN_REQ 0x14
121 #define L2CAP_LE_CONN_RSP 0x15
122 #define L2CAP_LE_CREDITS 0x16
123 #define L2CAP_ECRED_CONN_REQ 0x17
124 #define L2CAP_ECRED_CONN_RSP 0x18
125 #define L2CAP_ECRED_RECONF_REQ 0x19
126 #define L2CAP_ECRED_RECONF_RSP 0x1a
128 /* L2CAP extended feature mask */
129 #define L2CAP_FEAT_FLOWCTL 0x00000001
130 #define L2CAP_FEAT_RETRANS 0x00000002
131 #define L2CAP_FEAT_BIDIR_QOS 0x00000004
132 #define L2CAP_FEAT_ERTM 0x00000008
133 #define L2CAP_FEAT_STREAMING 0x00000010
134 #define L2CAP_FEAT_FCS 0x00000020
135 #define L2CAP_FEAT_EXT_FLOW 0x00000040
136 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
137 #define L2CAP_FEAT_EXT_WINDOW 0x00000100
138 #define L2CAP_FEAT_UCD 0x00000200
140 /* L2CAP checksum option */
141 #define L2CAP_FCS_NONE 0x00
142 #define L2CAP_FCS_CRC16 0x01
144 /* L2CAP fixed channels */
145 #define L2CAP_FC_SIG_BREDR 0x02
146 #define L2CAP_FC_CONNLESS 0x04
147 #define L2CAP_FC_A2MP 0x08
148 #define L2CAP_FC_ATT 0x10
149 #define L2CAP_FC_SIG_LE 0x20
150 #define L2CAP_FC_SMP_LE 0x40
151 #define L2CAP_FC_SMP_BREDR 0x80
153 /* L2CAP Control Field bit masks */
154 #define L2CAP_CTRL_SAR 0xC000
155 #define L2CAP_CTRL_REQSEQ 0x3F00
156 #define L2CAP_CTRL_TXSEQ 0x007E
157 #define L2CAP_CTRL_SUPERVISE 0x000C
159 #define L2CAP_CTRL_RETRANS 0x0080
160 #define L2CAP_CTRL_FINAL 0x0080
161 #define L2CAP_CTRL_POLL 0x0010
162 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
164 #define L2CAP_CTRL_TXSEQ_SHIFT 1
165 #define L2CAP_CTRL_SUPER_SHIFT 2
166 #define L2CAP_CTRL_POLL_SHIFT 4
167 #define L2CAP_CTRL_FINAL_SHIFT 7
168 #define L2CAP_CTRL_REQSEQ_SHIFT 8
169 #define L2CAP_CTRL_SAR_SHIFT 14
171 /* L2CAP Extended Control Field bit mask */
172 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
173 #define L2CAP_EXT_CTRL_SAR 0x00030000
174 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
175 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
177 #define L2CAP_EXT_CTRL_POLL 0x00040000
178 #define L2CAP_EXT_CTRL_FINAL 0x00000002
179 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
181 #define L2CAP_EXT_CTRL_FINAL_SHIFT 1
182 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
183 #define L2CAP_EXT_CTRL_SAR_SHIFT 16
184 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16
185 #define L2CAP_EXT_CTRL_POLL_SHIFT 18
186 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
188 /* L2CAP Supervisory Function */
189 #define L2CAP_SUPER_RR 0x00
190 #define L2CAP_SUPER_REJ 0x01
191 #define L2CAP_SUPER_RNR 0x02
192 #define L2CAP_SUPER_SREJ 0x03
194 /* L2CAP Segmentation and Reassembly */
195 #define L2CAP_SAR_UNSEGMENTED 0x00
196 #define L2CAP_SAR_START 0x01
197 #define L2CAP_SAR_END 0x02
198 #define L2CAP_SAR_CONTINUE 0x03
200 /* L2CAP Command rej. reasons */
201 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
202 #define L2CAP_REJ_MTU_EXCEEDED 0x0001
203 #define L2CAP_REJ_INVALID_CID 0x0002
205 /* L2CAP structures */
210 #define L2CAP_HDR_SIZE 4
211 #define L2CAP_ENH_HDR_SIZE 6
212 #define L2CAP_EXT_HDR_SIZE 8
214 #define L2CAP_FCS_SIZE 2
215 #define L2CAP_SDULEN_SIZE 2
216 #define L2CAP_PSMLEN_SIZE 2
217 #define L2CAP_ENH_CTRL_SIZE 2
218 #define L2CAP_EXT_CTRL_SIZE 4
220 struct l2cap_cmd_hdr {
225 #define L2CAP_CMD_HDR_SIZE 4
227 struct l2cap_cmd_rej_unk {
231 struct l2cap_cmd_rej_mtu {
236 struct l2cap_cmd_rej_cid {
242 struct l2cap_conn_req {
247 struct l2cap_conn_rsp {
254 /* protocol/service multiplexer (PSM) */
255 #define L2CAP_PSM_SDP 0x0001
256 #define L2CAP_PSM_RFCOMM 0x0003
257 #define L2CAP_PSM_3DSP 0x0021
258 #define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */
260 #define L2CAP_PSM_DYN_START 0x1001
261 #define L2CAP_PSM_DYN_END 0xffff
262 #define L2CAP_PSM_AUTO_END 0x10ff
263 #define L2CAP_PSM_LE_DYN_START 0x0080
264 #define L2CAP_PSM_LE_DYN_END 0x00ff
266 /* channel identifier */
267 #define L2CAP_CID_SIGNALING 0x0001
268 #define L2CAP_CID_CONN_LESS 0x0002
269 #define L2CAP_CID_A2MP 0x0003
270 #define L2CAP_CID_ATT 0x0004
271 #define L2CAP_CID_LE_SIGNALING 0x0005
272 #define L2CAP_CID_SMP 0x0006
273 #define L2CAP_CID_SMP_BREDR 0x0007
274 #define L2CAP_CID_DYN_START 0x0040
275 #define L2CAP_CID_DYN_END 0xffff
276 #define L2CAP_CID_LE_DYN_END 0x007f
278 /* connect/create channel results */
279 #define L2CAP_CR_SUCCESS 0x0000
280 #define L2CAP_CR_PEND 0x0001
281 #define L2CAP_CR_BAD_PSM 0x0002
282 #define L2CAP_CR_SEC_BLOCK 0x0003
283 #define L2CAP_CR_NO_MEM 0x0004
284 #define L2CAP_CR_BAD_AMP 0x0005
285 #define L2CAP_CR_INVALID_SCID 0x0006
286 #define L2CAP_CR_SCID_IN_USE 0x0007
288 /* credit based connect results */
289 #define L2CAP_CR_LE_SUCCESS 0x0000
290 #define L2CAP_CR_LE_BAD_PSM 0x0002
291 #define L2CAP_CR_LE_NO_MEM 0x0004
292 #define L2CAP_CR_LE_AUTHENTICATION 0x0005
293 #define L2CAP_CR_LE_AUTHORIZATION 0x0006
294 #define L2CAP_CR_LE_BAD_KEY_SIZE 0x0007
295 #define L2CAP_CR_LE_ENCRYPTION 0x0008
296 #define L2CAP_CR_LE_INVALID_SCID 0x0009
297 #define L2CAP_CR_LE_SCID_IN_USE 0X000A
298 #define L2CAP_CR_LE_UNACCEPT_PARAMS 0X000B
299 #define L2CAP_CR_LE_INVALID_PARAMS 0X000C
301 /* connect/create channel status */
302 #define L2CAP_CS_NO_INFO 0x0000
303 #define L2CAP_CS_AUTHEN_PEND 0x0001
304 #define L2CAP_CS_AUTHOR_PEND 0x0002
306 struct l2cap_conf_req {
312 struct l2cap_conf_rsp {
319 #define L2CAP_CONF_SUCCESS 0x0000
320 #define L2CAP_CONF_UNACCEPT 0x0001
321 #define L2CAP_CONF_REJECT 0x0002
322 #define L2CAP_CONF_UNKNOWN 0x0003
323 #define L2CAP_CONF_PENDING 0x0004
324 #define L2CAP_CONF_EFS_REJECT 0x0005
326 /* configuration req/rsp continuation flag */
327 #define L2CAP_CONF_FLAG_CONTINUATION 0x0001
329 struct l2cap_conf_opt {
334 #define L2CAP_CONF_OPT_SIZE 2
336 #define L2CAP_CONF_HINT 0x80
337 #define L2CAP_CONF_MASK 0x7f
339 #define L2CAP_CONF_MTU 0x01
340 #define L2CAP_CONF_FLUSH_TO 0x02
341 #define L2CAP_CONF_QOS 0x03
342 #define L2CAP_CONF_RFC 0x04
343 #define L2CAP_CONF_FCS 0x05
344 #define L2CAP_CONF_EFS 0x06
345 #define L2CAP_CONF_EWS 0x07
347 #define L2CAP_CONF_MAX_SIZE 22
349 struct l2cap_conf_rfc {
353 __le16 retrans_timeout;
354 __le16 monitor_timeout;
358 #define L2CAP_MODE_BASIC 0x00
359 #define L2CAP_MODE_RETRANS 0x01
360 #define L2CAP_MODE_FLOWCTL 0x02
361 #define L2CAP_MODE_ERTM 0x03
362 #define L2CAP_MODE_STREAMING 0x04
364 /* Unlike the above this one doesn't actually map to anything that would
365 * ever be sent over the air. Therefore, use a value that's unlikely to
366 * ever be used in the BR/EDR configuration phase.
368 #define L2CAP_MODE_LE_FLOWCTL 0x80
369 #define L2CAP_MODE_EXT_FLOWCTL 0x81
371 struct l2cap_conf_efs {
380 #define L2CAP_SERV_NOTRAFIC 0x00
381 #define L2CAP_SERV_BESTEFFORT 0x01
382 #define L2CAP_SERV_GUARANTEED 0x02
384 #define L2CAP_BESTEFFORT_ID 0x01
386 struct l2cap_disconn_req {
391 struct l2cap_disconn_rsp {
396 struct l2cap_info_req {
400 struct l2cap_info_rsp {
406 struct l2cap_create_chan_req {
412 struct l2cap_create_chan_rsp {
419 struct l2cap_move_chan_req {
424 struct l2cap_move_chan_rsp {
429 #define L2CAP_MR_SUCCESS 0x0000
430 #define L2CAP_MR_PEND 0x0001
431 #define L2CAP_MR_BAD_ID 0x0002
432 #define L2CAP_MR_SAME_ID 0x0003
433 #define L2CAP_MR_NOT_SUPP 0x0004
434 #define L2CAP_MR_COLLISION 0x0005
435 #define L2CAP_MR_NOT_ALLOWED 0x0006
437 struct l2cap_move_chan_cfm {
442 #define L2CAP_MC_CONFIRMED 0x0000
443 #define L2CAP_MC_UNCONFIRMED 0x0001
445 struct l2cap_move_chan_cfm_rsp {
450 #define L2CAP_IT_CL_MTU 0x0001
451 #define L2CAP_IT_FEAT_MASK 0x0002
452 #define L2CAP_IT_FIXED_CHAN 0x0003
455 #define L2CAP_IR_SUCCESS 0x0000
456 #define L2CAP_IR_NOTSUPP 0x0001
458 struct l2cap_conn_param_update_req {
462 __le16 to_multiplier;
465 struct l2cap_conn_param_update_rsp {
469 /* Connection Parameters result */
470 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000
471 #define L2CAP_CONN_PARAM_REJECTED 0x0001
473 struct l2cap_le_conn_req {
481 struct l2cap_le_conn_rsp {
489 struct l2cap_le_credits {
494 #define L2CAP_ECRED_MIN_MTU 64
495 #define L2CAP_ECRED_MIN_MPS 64
496 #define L2CAP_ECRED_MAX_CID 5
498 struct l2cap_ecred_conn_req {
506 struct l2cap_ecred_conn_rsp {
514 struct l2cap_ecred_reconf_req {
520 #define L2CAP_RECONF_SUCCESS 0x0000
521 #define L2CAP_RECONF_INVALID_MTU 0x0001
522 #define L2CAP_RECONF_INVALID_MPS 0x0002
524 struct l2cap_ecred_reconf_rsp {
528 /* ----- L2CAP channels and connections ----- */
529 struct l2cap_seq_list {
536 #define L2CAP_SEQ_LIST_CLEAR 0xFFFF
537 #define L2CAP_SEQ_LIST_TAIL 0x8000
540 struct l2cap_conn *conn;
541 struct hci_conn *hs_hcon;
542 struct hci_chan *hs_hchan;
579 __u16 retrans_timeout;
580 __u16 monitor_timeout;
589 unsigned long conf_state;
590 unsigned long conn_state;
600 __u16 expected_ack_seq;
601 __u16 expected_tx_seq;
603 __u16 srej_save_reqseq;
604 __u16 last_acked_seq;
606 __u16 unacked_frames;
610 struct sk_buff *sdu_last_frag;
619 __u32 local_sdu_itime;
621 __u32 local_flush_to;
626 __u32 remote_sdu_itime;
627 __u32 remote_acc_lat;
628 __u32 remote_flush_to;
630 struct delayed_work chan_timer;
631 struct delayed_work retrans_timer;
632 struct delayed_work monitor_timer;
633 struct delayed_work ack_timer;
635 struct sk_buff *tx_send_head;
636 struct sk_buff_head tx_q;
637 struct sk_buff_head srej_q;
638 struct l2cap_seq_list srej_list;
639 struct l2cap_seq_list retrans_list;
641 struct list_head list;
642 struct list_head global_l;
645 const struct l2cap_ops *ops;
652 struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan);
653 int (*recv) (struct l2cap_chan * chan,
654 struct sk_buff *skb);
655 void (*teardown) (struct l2cap_chan *chan, int err);
656 void (*close) (struct l2cap_chan *chan);
657 void (*state_change) (struct l2cap_chan *chan,
659 void (*ready) (struct l2cap_chan *chan);
660 void (*defer) (struct l2cap_chan *chan);
661 void (*resume) (struct l2cap_chan *chan);
662 void (*suspend) (struct l2cap_chan *chan);
663 void (*set_shutdown) (struct l2cap_chan *chan);
664 long (*get_sndtimeo) (struct l2cap_chan *chan);
665 struct pid *(*get_peer_pid) (struct l2cap_chan *chan);
666 struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
667 unsigned long hdr_len,
668 unsigned long len, int nb);
669 int (*filter) (struct l2cap_chan * chan,
670 struct sk_buff *skb);
674 struct hci_conn *hcon;
675 struct hci_chan *hchan;
680 __u8 remote_fixed_chan;
681 __u8 local_fixed_chan;
686 struct delayed_work info_timer;
688 struct sk_buff *rx_skb;
691 struct mutex ident_lock;
693 struct sk_buff_head pending_rx;
694 struct work_struct pending_rx_work;
696 struct work_struct id_addr_update_work;
700 struct l2cap_chan *smp;
702 struct list_head chan_l;
703 struct mutex chan_lock;
705 struct list_head users;
709 struct list_head list;
710 int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user);
711 void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user);
714 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
715 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
716 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
718 #define L2CAP_CHAN_RAW 1
719 #define L2CAP_CHAN_CONN_LESS 2
720 #define L2CAP_CHAN_CONN_ORIENTED 3
721 #define L2CAP_CHAN_FIXED 4
723 /* ----- L2CAP socket info ----- */
724 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
728 struct l2cap_chan *chan;
729 struct sk_buff *rx_busy_skb;
747 #define L2CAP_CONF_MAX_CONF_REQ 2
748 #define L2CAP_CONF_MAX_CONF_RSP 2
762 /* Definitions for flags in l2cap_chan */
771 FLAG_LE_CONN_REQ_SENT,
772 FLAG_ECRED_CONN_REQ_SENT,
773 FLAG_PENDING_SECURITY,
777 /* Lock nesting levels for L2CAP channels. We need these because lockdep
778 * otherwise considers all channels equal and will e.g. complain about a
779 * connection oriented channel triggering SMP procedures or a listening
780 * channel creating and locking a child channel.
784 L2CAP_NESTING_NORMAL,
785 L2CAP_NESTING_PARENT,
790 L2CAP_TX_STATE_WAIT_F,
795 L2CAP_RX_STATE_SREJ_SENT,
797 L2CAP_RX_STATE_WAIT_P,
798 L2CAP_RX_STATE_WAIT_F,
802 L2CAP_TXSEQ_EXPECTED,
803 L2CAP_TXSEQ_EXPECTED_SREJ,
804 L2CAP_TXSEQ_UNEXPECTED,
805 L2CAP_TXSEQ_UNEXPECTED_SREJ,
806 L2CAP_TXSEQ_DUPLICATE,
807 L2CAP_TXSEQ_DUPLICATE_SREJ,
809 L2CAP_TXSEQ_INVALID_IGNORE,
813 L2CAP_EV_DATA_REQUEST,
814 L2CAP_EV_LOCAL_BUSY_DETECTED,
815 L2CAP_EV_LOCAL_BUSY_CLEAR,
816 L2CAP_EV_RECV_REQSEQ_AND_FBIT,
820 L2CAP_EV_EXPLICIT_POLL,
821 L2CAP_EV_RECV_IFRAME,
830 L2CAP_MOVE_ROLE_NONE,
831 L2CAP_MOVE_ROLE_INITIATOR,
832 L2CAP_MOVE_ROLE_RESPONDER,
839 L2CAP_MOVE_WAIT_RSP_SUCCESS,
840 L2CAP_MOVE_WAIT_CONFIRM,
841 L2CAP_MOVE_WAIT_CONFIRM_RSP,
842 L2CAP_MOVE_WAIT_LOGICAL_COMP,
843 L2CAP_MOVE_WAIT_LOGICAL_CFM,
844 L2CAP_MOVE_WAIT_LOCAL_BUSY,
845 L2CAP_MOVE_WAIT_PREPARE,
848 void l2cap_chan_hold(struct l2cap_chan *c);
849 struct l2cap_chan *l2cap_chan_hold_unless_zero(struct l2cap_chan *c);
850 void l2cap_chan_put(struct l2cap_chan *c);
852 static inline void l2cap_chan_lock(struct l2cap_chan *chan)
854 mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting));
857 static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
859 mutex_unlock(&chan->lock);
862 static inline void l2cap_set_timer(struct l2cap_chan *chan,
863 struct delayed_work *work, long timeout)
865 BT_DBG("chan %p state %s timeout %ld", chan,
866 state_to_string(chan->state), timeout);
868 /* If delayed work cancelled do not hold(chan)
869 since it is already done with previous set_timer */
870 if (!cancel_delayed_work(work))
871 l2cap_chan_hold(chan);
873 schedule_delayed_work(work, timeout);
876 static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
877 struct delayed_work *work)
881 /* put(chan) if delayed work cancelled otherwise it
882 is done in delayed work function */
883 ret = cancel_delayed_work(work);
885 l2cap_chan_put(chan);
890 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
891 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
892 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
893 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
894 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
895 msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
896 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
898 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
903 return chan->tx_win_max + 1 - seq2 + seq1;
906 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
908 return (seq + 1) % (chan->tx_win_max + 1);
911 static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan)
916 static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb)
921 static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan,
922 unsigned long hdr_len,
923 unsigned long len, int nb)
925 return ERR_PTR(-ENOSYS);
928 static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err)
932 static inline void l2cap_chan_no_close(struct l2cap_chan *chan)
936 static inline void l2cap_chan_no_ready(struct l2cap_chan *chan)
940 static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan,
945 static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
949 static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan)
953 static inline void l2cap_chan_no_resume(struct l2cap_chan *chan)
957 static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan)
961 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
966 extern bool disable_ertm;
967 extern bool enable_ecred;
969 int l2cap_init_sockets(void);
970 void l2cap_cleanup_sockets(void);
971 bool l2cap_is_socket(struct socket *sock);
973 void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan);
974 void __l2cap_ecred_conn_rsp_defer(struct l2cap_chan *chan);
975 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
977 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
978 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
980 struct l2cap_chan *l2cap_chan_create(void);
981 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
982 int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
983 bdaddr_t *dst, u8 dst_type);
984 int l2cap_chan_reconfigure(struct l2cap_chan *chan, __u16 mtu);
985 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len);
986 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
987 int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator);
988 void l2cap_chan_set_defaults(struct l2cap_chan *chan);
989 int l2cap_ertm_init(struct l2cap_chan *chan);
990 void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
991 void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan);
992 typedef void (*l2cap_chan_func_t)(struct l2cap_chan *chan, void *data);
993 void l2cap_chan_list(struct l2cap_conn *conn, l2cap_chan_func_t func,
995 void l2cap_chan_del(struct l2cap_chan *chan, int err);
996 void l2cap_send_conn_req(struct l2cap_chan *chan);
997 void l2cap_move_start(struct l2cap_chan *chan);
998 void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
1000 void __l2cap_physical_cfm(struct l2cap_chan *chan, int result);
1002 struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn);
1003 void l2cap_conn_put(struct l2cap_conn *conn);
1005 int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user);
1006 void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user);
1008 #endif /* __L2CAP_H */