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_CONN_PARAM_UPDATE_REQ 0x12
98 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
100 /* L2CAP extended feature mask */
101 #define L2CAP_FEAT_FLOWCTL 0x00000001
102 #define L2CAP_FEAT_RETRANS 0x00000002
103 #define L2CAP_FEAT_BIDIR_QOS 0x00000004
104 #define L2CAP_FEAT_ERTM 0x00000008
105 #define L2CAP_FEAT_STREAMING 0x00000010
106 #define L2CAP_FEAT_FCS 0x00000020
107 #define L2CAP_FEAT_EXT_FLOW 0x00000040
108 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
109 #define L2CAP_FEAT_EXT_WINDOW 0x00000100
110 #define L2CAP_FEAT_UCD 0x00000200
112 /* L2CAP checksum option */
113 #define L2CAP_FCS_NONE 0x00
114 #define L2CAP_FCS_CRC16 0x01
116 /* L2CAP Control Field bit masks */
117 #define L2CAP_CTRL_SAR 0xC000
118 #define L2CAP_CTRL_REQSEQ 0x3F00
119 #define L2CAP_CTRL_TXSEQ 0x007E
120 #define L2CAP_CTRL_SUPERVISE 0x000C
122 #define L2CAP_CTRL_RETRANS 0x0080
123 #define L2CAP_CTRL_FINAL 0x0080
124 #define L2CAP_CTRL_POLL 0x0010
125 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
127 #define L2CAP_CTRL_TXSEQ_SHIFT 1
128 #define L2CAP_CTRL_SUPER_SHIFT 2
129 #define L2CAP_CTRL_REQSEQ_SHIFT 8
130 #define L2CAP_CTRL_SAR_SHIFT 14
132 /* L2CAP Extended Control Field bit mask */
133 #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000
134 #define L2CAP_EXT_CTRL_SAR 0x00030000
135 #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000
136 #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC
138 #define L2CAP_EXT_CTRL_POLL 0x00040000
139 #define L2CAP_EXT_CTRL_FINAL 0x00000002
140 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */
142 #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2
143 #define L2CAP_EXT_CTRL_SAR_SHIFT 16
144 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16
145 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18
147 /* L2CAP Supervisory Function */
148 #define L2CAP_SUPER_RR 0x00
149 #define L2CAP_SUPER_REJ 0x01
150 #define L2CAP_SUPER_RNR 0x02
151 #define L2CAP_SUPER_SREJ 0x03
153 /* L2CAP Segmentation and Reassembly */
154 #define L2CAP_SAR_UNSEGMENTED 0x00
155 #define L2CAP_SAR_START 0x01
156 #define L2CAP_SAR_END 0x02
157 #define L2CAP_SAR_CONTINUE 0x03
159 /* L2CAP Command rej. reasons */
160 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
161 #define L2CAP_REJ_MTU_EXCEEDED 0x0001
162 #define L2CAP_REJ_INVALID_CID 0x0002
164 /* L2CAP structures */
169 #define L2CAP_HDR_SIZE 4
170 #define L2CAP_ENH_HDR_SIZE 6
171 #define L2CAP_EXT_HDR_SIZE 8
173 #define L2CAP_FCS_SIZE 2
174 #define L2CAP_SDULEN_SIZE 2
175 #define L2CAP_PSMLEN_SIZE 2
177 struct l2cap_cmd_hdr {
182 #define L2CAP_CMD_HDR_SIZE 4
184 struct l2cap_cmd_rej_unk {
188 struct l2cap_cmd_rej_mtu {
193 struct l2cap_cmd_rej_cid {
199 struct l2cap_conn_req {
204 struct l2cap_conn_rsp {
211 /* channel indentifier */
212 #define L2CAP_CID_SIGNALING 0x0001
213 #define L2CAP_CID_CONN_LESS 0x0002
214 #define L2CAP_CID_LE_DATA 0x0004
215 #define L2CAP_CID_LE_SIGNALING 0x0005
216 #define L2CAP_CID_SMP 0x0006
217 #define L2CAP_CID_DYN_START 0x0040
218 #define L2CAP_CID_DYN_END 0xffff
221 #define L2CAP_CR_SUCCESS 0x0000
222 #define L2CAP_CR_PEND 0x0001
223 #define L2CAP_CR_BAD_PSM 0x0002
224 #define L2CAP_CR_SEC_BLOCK 0x0003
225 #define L2CAP_CR_NO_MEM 0x0004
228 #define L2CAP_CS_NO_INFO 0x0000
229 #define L2CAP_CS_AUTHEN_PEND 0x0001
230 #define L2CAP_CS_AUTHOR_PEND 0x0002
232 struct l2cap_conf_req {
238 struct l2cap_conf_rsp {
245 #define L2CAP_CONF_SUCCESS 0x0000
246 #define L2CAP_CONF_UNACCEPT 0x0001
247 #define L2CAP_CONF_REJECT 0x0002
248 #define L2CAP_CONF_UNKNOWN 0x0003
249 #define L2CAP_CONF_PENDING 0x0004
250 #define L2CAP_CONF_EFS_REJECT 0x0005
252 struct l2cap_conf_opt {
257 #define L2CAP_CONF_OPT_SIZE 2
259 #define L2CAP_CONF_HINT 0x80
260 #define L2CAP_CONF_MASK 0x7f
262 #define L2CAP_CONF_MTU 0x01
263 #define L2CAP_CONF_FLUSH_TO 0x02
264 #define L2CAP_CONF_QOS 0x03
265 #define L2CAP_CONF_RFC 0x04
266 #define L2CAP_CONF_FCS 0x05
267 #define L2CAP_CONF_EFS 0x06
268 #define L2CAP_CONF_EWS 0x07
270 #define L2CAP_CONF_MAX_SIZE 22
272 struct l2cap_conf_rfc {
276 __le16 retrans_timeout;
277 __le16 monitor_timeout;
281 #define L2CAP_MODE_BASIC 0x00
282 #define L2CAP_MODE_RETRANS 0x01
283 #define L2CAP_MODE_FLOWCTL 0x02
284 #define L2CAP_MODE_ERTM 0x03
285 #define L2CAP_MODE_STREAMING 0x04
287 struct l2cap_conf_efs {
296 #define L2CAP_SERV_NOTRAFIC 0x00
297 #define L2CAP_SERV_BESTEFFORT 0x01
298 #define L2CAP_SERV_GUARANTEED 0x02
300 #define L2CAP_BESTEFFORT_ID 0x01
302 struct l2cap_disconn_req {
307 struct l2cap_disconn_rsp {
312 struct l2cap_info_req {
316 struct l2cap_info_rsp {
323 #define L2CAP_IT_CL_MTU 0x0001
324 #define L2CAP_IT_FEAT_MASK 0x0002
325 #define L2CAP_IT_FIXED_CHAN 0x0003
328 #define L2CAP_IR_SUCCESS 0x0000
329 #define L2CAP_IR_NOTSUPP 0x0001
331 struct l2cap_conn_param_update_req {
335 __le16 to_multiplier;
338 struct l2cap_conn_param_update_rsp {
342 /* Connection Parameters result */
343 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000
344 #define L2CAP_CONN_PARAM_REJECTED 0x0001
346 /* ----- L2CAP channels and connections ----- */
349 struct list_head list;
355 struct l2cap_conn *conn;
387 __u16 retrans_timeout;
388 __u16 monitor_timeout;
391 unsigned long conf_state;
392 unsigned long conn_state;
396 __u16 expected_ack_seq;
397 __u16 expected_tx_seq;
399 __u16 buffer_seq_srej;
400 __u16 srej_save_reqseq;
402 __u16 unacked_frames;
407 struct sk_buff *sdu_last_frag;
416 __u32 local_sdu_itime;
418 __u32 local_flush_to;
423 __u32 remote_sdu_itime;
424 __u32 remote_acc_lat;
425 __u32 remote_flush_to;
427 struct timer_list chan_timer;
428 struct timer_list retrans_timer;
429 struct timer_list monitor_timer;
430 struct timer_list ack_timer;
431 struct sk_buff *tx_send_head;
432 struct sk_buff_head tx_q;
433 struct sk_buff_head srej_q;
434 struct list_head srej_l;
436 struct list_head list;
437 struct list_head global_l;
440 struct l2cap_ops *ops;
446 struct l2cap_chan *(*new_connection) (void *data);
447 int (*recv) (void *data, struct sk_buff *skb);
448 void (*close) (void *data);
449 void (*state_change) (void *data, int state);
453 struct hci_conn *hcon;
454 struct hci_chan *hchan;
466 struct timer_list info_timer;
470 struct sk_buff *rx_skb;
476 struct timer_list security_timer;
477 struct smp_chan *smp_chan;
479 struct list_head chan_l;
483 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
484 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
485 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
487 #define L2CAP_CHAN_RAW 1
488 #define L2CAP_CHAN_CONN_LESS 2
489 #define L2CAP_CHAN_CONN_ORIENTED 3
491 /* ----- L2CAP socket info ----- */
492 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
496 struct l2cap_chan *chan;
497 struct sk_buff *rx_busy_skb;
514 #define L2CAP_CONF_MAX_CONF_REQ 2
515 #define L2CAP_CONF_MAX_CONF_RSP 2
529 /* Definitions for flags in l2cap_chan */
539 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
540 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
541 #define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
542 L2CAP_DEFAULT_RETRANS_TO);
543 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
544 #define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
545 L2CAP_DEFAULT_MONITOR_TO);
546 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
547 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
548 L2CAP_DEFAULT_ACK_TO);
549 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
551 static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2)
555 offset = (seq1 - seq2) % (chan->tx_win_max + 1);
557 offset += (chan->tx_win_max + 1);
562 static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq)
564 return (seq + 1) % (chan->tx_win_max + 1);
567 static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
571 sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
576 return sub == ch->remote_tx_win;
579 static inline __u16 __get_reqseq(struct l2cap_chan *chan, __u32 ctrl)
581 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
582 return (ctrl & L2CAP_EXT_CTRL_REQSEQ) >>
583 L2CAP_EXT_CTRL_REQSEQ_SHIFT;
585 return (ctrl & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT;
588 static inline __u32 __set_reqseq(struct l2cap_chan *chan, __u32 reqseq)
590 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
591 return (reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT) &
592 L2CAP_EXT_CTRL_REQSEQ;
594 return (reqseq << L2CAP_CTRL_REQSEQ_SHIFT) & L2CAP_CTRL_REQSEQ;
597 static inline __u16 __get_txseq(struct l2cap_chan *chan, __u32 ctrl)
599 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
600 return (ctrl & L2CAP_EXT_CTRL_TXSEQ) >>
601 L2CAP_EXT_CTRL_TXSEQ_SHIFT;
603 return (ctrl & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT;
606 static inline __u32 __set_txseq(struct l2cap_chan *chan, __u32 txseq)
608 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
609 return (txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT) &
610 L2CAP_EXT_CTRL_TXSEQ;
612 return (txseq << L2CAP_CTRL_TXSEQ_SHIFT) & L2CAP_CTRL_TXSEQ;
615 static inline bool __is_sframe(struct l2cap_chan *chan, __u32 ctrl)
617 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
618 return ctrl & L2CAP_EXT_CTRL_FRAME_TYPE;
620 return ctrl & L2CAP_CTRL_FRAME_TYPE;
623 static inline __u32 __set_sframe(struct l2cap_chan *chan)
625 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
626 return L2CAP_EXT_CTRL_FRAME_TYPE;
628 return L2CAP_CTRL_FRAME_TYPE;
631 static inline __u8 __get_ctrl_sar(struct l2cap_chan *chan, __u32 ctrl)
633 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
634 return (ctrl & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT;
636 return (ctrl & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT;
639 static inline __u32 __set_ctrl_sar(struct l2cap_chan *chan, __u32 sar)
641 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
642 return (sar << L2CAP_EXT_CTRL_SAR_SHIFT) & L2CAP_EXT_CTRL_SAR;
644 return (sar << L2CAP_CTRL_SAR_SHIFT) & L2CAP_CTRL_SAR;
647 static inline bool __is_sar_start(struct l2cap_chan *chan, __u32 ctrl)
649 return __get_ctrl_sar(chan, ctrl) == L2CAP_SAR_START;
652 static inline __u32 __get_sar_mask(struct l2cap_chan *chan)
654 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
655 return L2CAP_EXT_CTRL_SAR;
657 return L2CAP_CTRL_SAR;
660 static inline __u8 __get_ctrl_super(struct l2cap_chan *chan, __u32 ctrl)
662 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
663 return (ctrl & L2CAP_EXT_CTRL_SUPERVISE) >>
664 L2CAP_EXT_CTRL_SUPER_SHIFT;
666 return (ctrl & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT;
669 static inline __u32 __set_ctrl_super(struct l2cap_chan *chan, __u32 super)
671 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
672 return (super << L2CAP_EXT_CTRL_SUPER_SHIFT) &
673 L2CAP_EXT_CTRL_SUPERVISE;
675 return (super << L2CAP_CTRL_SUPER_SHIFT) &
676 L2CAP_CTRL_SUPERVISE;
679 static inline __u32 __set_ctrl_final(struct l2cap_chan *chan)
681 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
682 return L2CAP_EXT_CTRL_FINAL;
684 return L2CAP_CTRL_FINAL;
687 static inline bool __is_ctrl_final(struct l2cap_chan *chan, __u32 ctrl)
689 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
690 return ctrl & L2CAP_EXT_CTRL_FINAL;
692 return ctrl & L2CAP_CTRL_FINAL;
695 static inline __u32 __set_ctrl_poll(struct l2cap_chan *chan)
697 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
698 return L2CAP_EXT_CTRL_POLL;
700 return L2CAP_CTRL_POLL;
703 static inline bool __is_ctrl_poll(struct l2cap_chan *chan, __u32 ctrl)
705 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
706 return ctrl & L2CAP_EXT_CTRL_POLL;
708 return ctrl & L2CAP_CTRL_POLL;
711 static inline __u32 __get_control(struct l2cap_chan *chan, void *p)
713 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
714 return get_unaligned_le32(p);
716 return get_unaligned_le16(p);
719 static inline void __put_control(struct l2cap_chan *chan, __u32 control,
722 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
723 return put_unaligned_le32(control, p);
725 return put_unaligned_le16(control, p);
728 static inline __u8 __ctrl_size(struct l2cap_chan *chan)
730 if (test_bit(FLAG_EXT_CTRL, &chan->flags))
731 return L2CAP_EXT_HDR_SIZE - L2CAP_HDR_SIZE;
733 return L2CAP_ENH_HDR_SIZE - L2CAP_HDR_SIZE;
736 extern int disable_ertm;
737 extern int enable_hs;
739 int l2cap_init_sockets(void);
740 void l2cap_cleanup_sockets(void);
742 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
743 int __l2cap_wait_ack(struct sock *sk);
745 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
746 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
748 struct l2cap_chan *l2cap_chan_create(struct sock *sk);
749 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
750 void l2cap_chan_destroy(struct l2cap_chan *chan);
751 int l2cap_chan_connect(struct l2cap_chan *chan);
752 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len,
754 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
756 #endif /* __L2CAP_H */