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.
31 #define L2CAP_DEFAULT_MTU 672
32 #define L2CAP_DEFAULT_MIN_MTU 48
33 #define L2CAP_DEFAULT_FLUSH_TO 0xffff
34 #define L2CAP_DEFAULT_TX_WINDOW 63
35 #define L2CAP_DEFAULT_MAX_TX 3
36 #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */
37 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
38 #define L2CAP_DEFAULT_MAX_PDU_SIZE 1009 /* Sized for 3-DH5 packet */
39 #define L2CAP_DEFAULT_ACK_TO 200
40 #define L2CAP_LE_DEFAULT_MTU 23
42 #define L2CAP_DISC_TIMEOUT (100)
43 #define L2CAP_DISC_REJ_TIMEOUT (5000) /* 5 seconds */
44 #define L2CAP_ENC_TIMEOUT (5000) /* 5 seconds */
45 #define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */
46 #define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */
48 /* L2CAP socket address */
50 sa_family_t l2_family;
56 /* L2CAP socket options */
57 #define L2CAP_OPTIONS 0x01
58 struct l2cap_options {
68 #define L2CAP_CONNINFO 0x02
69 struct l2cap_conninfo {
75 #define L2CAP_LM_MASTER 0x0001
76 #define L2CAP_LM_AUTH 0x0002
77 #define L2CAP_LM_ENCRYPT 0x0004
78 #define L2CAP_LM_TRUSTED 0x0008
79 #define L2CAP_LM_RELIABLE 0x0010
80 #define L2CAP_LM_SECURE 0x0020
82 /* L2CAP command codes */
83 #define L2CAP_COMMAND_REJ 0x01
84 #define L2CAP_CONN_REQ 0x02
85 #define L2CAP_CONN_RSP 0x03
86 #define L2CAP_CONF_REQ 0x04
87 #define L2CAP_CONF_RSP 0x05
88 #define L2CAP_DISCONN_REQ 0x06
89 #define L2CAP_DISCONN_RSP 0x07
90 #define L2CAP_ECHO_REQ 0x08
91 #define L2CAP_ECHO_RSP 0x09
92 #define L2CAP_INFO_REQ 0x0a
93 #define L2CAP_INFO_RSP 0x0b
94 #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12
95 #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13
97 /* L2CAP feature mask */
98 #define L2CAP_FEAT_FLOWCTL 0x00000001
99 #define L2CAP_FEAT_RETRANS 0x00000002
100 #define L2CAP_FEAT_ERTM 0x00000008
101 #define L2CAP_FEAT_STREAMING 0x00000010
102 #define L2CAP_FEAT_FCS 0x00000020
103 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
105 /* L2CAP checksum option */
106 #define L2CAP_FCS_NONE 0x00
107 #define L2CAP_FCS_CRC16 0x01
109 /* L2CAP Control Field bit masks */
110 #define L2CAP_CTRL_SAR 0xC000
111 #define L2CAP_CTRL_REQSEQ 0x3F00
112 #define L2CAP_CTRL_TXSEQ 0x007E
113 #define L2CAP_CTRL_RETRANS 0x0080
114 #define L2CAP_CTRL_FINAL 0x0080
115 #define L2CAP_CTRL_POLL 0x0010
116 #define L2CAP_CTRL_SUPERVISE 0x000C
117 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
119 #define L2CAP_CTRL_TXSEQ_SHIFT 1
120 #define L2CAP_CTRL_REQSEQ_SHIFT 8
121 #define L2CAP_CTRL_SAR_SHIFT 14
123 /* L2CAP Supervisory Function */
124 #define L2CAP_SUPER_RCV_READY 0x0000
125 #define L2CAP_SUPER_REJECT 0x0004
126 #define L2CAP_SUPER_RCV_NOT_READY 0x0008
127 #define L2CAP_SUPER_SELECT_REJECT 0x000C
129 /* L2CAP Segmentation and Reassembly */
130 #define L2CAP_SDU_UNSEGMENTED 0x0000
131 #define L2CAP_SDU_START 0x4000
132 #define L2CAP_SDU_END 0x8000
133 #define L2CAP_SDU_CONTINUE 0xC000
135 /* L2CAP Command rej. reasons */
136 #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
137 #define L2CAP_REJ_MTU_EXCEEDED 0x0001
138 #define L2CAP_REJ_INVALID_CID 0x0002
141 /* L2CAP structures */
146 #define L2CAP_HDR_SIZE 4
148 struct l2cap_cmd_hdr {
153 #define L2CAP_CMD_HDR_SIZE 4
155 struct l2cap_cmd_rej_unk {
159 struct l2cap_cmd_rej_mtu {
164 struct l2cap_cmd_rej_cid {
170 struct l2cap_conn_req {
175 struct l2cap_conn_rsp {
182 /* channel indentifier */
183 #define L2CAP_CID_SIGNALING 0x0001
184 #define L2CAP_CID_CONN_LESS 0x0002
185 #define L2CAP_CID_LE_DATA 0x0004
186 #define L2CAP_CID_LE_SIGNALING 0x0005
187 #define L2CAP_CID_SMP 0x0006
188 #define L2CAP_CID_DYN_START 0x0040
189 #define L2CAP_CID_DYN_END 0xffff
192 #define L2CAP_CR_SUCCESS 0x0000
193 #define L2CAP_CR_PEND 0x0001
194 #define L2CAP_CR_BAD_PSM 0x0002
195 #define L2CAP_CR_SEC_BLOCK 0x0003
196 #define L2CAP_CR_NO_MEM 0x0004
199 #define L2CAP_CS_NO_INFO 0x0000
200 #define L2CAP_CS_AUTHEN_PEND 0x0001
201 #define L2CAP_CS_AUTHOR_PEND 0x0002
203 struct l2cap_conf_req {
209 struct l2cap_conf_rsp {
216 #define L2CAP_CONF_SUCCESS 0x0000
217 #define L2CAP_CONF_UNACCEPT 0x0001
218 #define L2CAP_CONF_REJECT 0x0002
219 #define L2CAP_CONF_UNKNOWN 0x0003
221 struct l2cap_conf_opt {
226 #define L2CAP_CONF_OPT_SIZE 2
228 #define L2CAP_CONF_HINT 0x80
229 #define L2CAP_CONF_MASK 0x7f
231 #define L2CAP_CONF_MTU 0x01
232 #define L2CAP_CONF_FLUSH_TO 0x02
233 #define L2CAP_CONF_QOS 0x03
234 #define L2CAP_CONF_RFC 0x04
235 #define L2CAP_CONF_FCS 0x05
237 #define L2CAP_CONF_MAX_SIZE 22
239 struct l2cap_conf_rfc {
243 __le16 retrans_timeout;
244 __le16 monitor_timeout;
248 #define L2CAP_MODE_BASIC 0x00
249 #define L2CAP_MODE_RETRANS 0x01
250 #define L2CAP_MODE_FLOWCTL 0x02
251 #define L2CAP_MODE_ERTM 0x03
252 #define L2CAP_MODE_STREAMING 0x04
254 struct l2cap_disconn_req {
259 struct l2cap_disconn_rsp {
264 struct l2cap_info_req {
268 struct l2cap_info_rsp {
275 #define L2CAP_IT_CL_MTU 0x0001
276 #define L2CAP_IT_FEAT_MASK 0x0002
277 #define L2CAP_IT_FIXED_CHAN 0x0003
280 #define L2CAP_IR_SUCCESS 0x0000
281 #define L2CAP_IR_NOTSUPP 0x0001
283 struct l2cap_conn_param_update_req {
287 __le16 to_multiplier;
290 struct l2cap_conn_param_update_rsp {
294 /* Connection Parameters result */
295 #define L2CAP_CONN_PARAM_ACCEPTED 0x0000
296 #define L2CAP_CONN_PARAM_REJECTED 0x0001
298 /* ----- L2CAP channels and connections ----- */
301 struct list_head list;
307 struct l2cap_conn *conn;
342 __u16 retrans_timeout;
343 __u16 monitor_timeout;
346 unsigned long conf_state;
347 unsigned long conn_state;
350 __u8 expected_ack_seq;
351 __u8 expected_tx_seq;
353 __u8 buffer_seq_srej;
354 __u8 srej_save_reqseq;
361 struct sk_buff *sdu_last_frag;
367 struct timer_list chan_timer;
368 struct timer_list retrans_timer;
369 struct timer_list monitor_timer;
370 struct timer_list ack_timer;
371 struct sk_buff *tx_send_head;
372 struct sk_buff_head tx_q;
373 struct sk_buff_head srej_q;
374 struct list_head srej_l;
376 struct list_head list;
377 struct list_head global_l;
380 struct l2cap_ops *ops;
386 struct l2cap_chan *(*new_connection) (void *data);
387 int (*recv) (void *data, struct sk_buff *skb);
388 void (*close) (void *data);
389 void (*state_change) (void *data, int state);
393 struct hci_conn *hcon;
405 struct timer_list info_timer;
409 struct sk_buff *rx_skb;
415 struct timer_list security_timer;
416 struct smp_chan *smp_chan;
418 struct list_head chan_l;
422 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
423 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
424 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
426 #define L2CAP_CHAN_RAW 1
427 #define L2CAP_CHAN_CONN_LESS 2
428 #define L2CAP_CHAN_CONN_ORIENTED 3
430 /* ----- L2CAP socket info ----- */
431 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
435 struct l2cap_chan *chan;
436 struct sk_buff *rx_busy_skb;
450 #define L2CAP_CONF_MAX_CONF_REQ 2
451 #define L2CAP_CONF_MAX_CONF_RSP 2
465 #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t))
466 #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer)
467 #define __set_retrans_timer(c) l2cap_set_timer(c, &c->retrans_timer, \
468 L2CAP_DEFAULT_RETRANS_TO);
469 #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer)
470 #define __set_monitor_timer(c) l2cap_set_timer(c, &c->monitor_timer, \
471 L2CAP_DEFAULT_MONITOR_TO);
472 #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer)
473 #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \
474 L2CAP_DEFAULT_ACK_TO);
475 #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer)
477 static inline int l2cap_tx_window_full(struct l2cap_chan *ch)
481 sub = (ch->next_tx_seq - ch->expected_ack_seq) % 64;
486 return sub == ch->remote_tx_win;
489 #define __get_txseq(ctrl) (((ctrl) & L2CAP_CTRL_TXSEQ) >> 1)
490 #define __get_reqseq(ctrl) (((ctrl) & L2CAP_CTRL_REQSEQ) >> 8)
491 #define __is_iframe(ctrl) (!((ctrl) & L2CAP_CTRL_FRAME_TYPE))
492 #define __is_sframe(ctrl) ((ctrl) & L2CAP_CTRL_FRAME_TYPE)
493 #define __is_sar_start(ctrl) (((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START)
495 extern int disable_ertm;
497 int l2cap_init_sockets(void);
498 void l2cap_cleanup_sockets(void);
499 bool l2cap_is_socket(struct socket *sock);
501 void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
502 int __l2cap_wait_ack(struct sock *sk);
504 int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
505 int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);
507 struct l2cap_chan *l2cap_chan_create(struct sock *sk);
508 void l2cap_chan_close(struct l2cap_chan *chan, int reason);
509 void l2cap_chan_destroy(struct l2cap_chan *chan);
510 int l2cap_chan_connect(struct l2cap_chan *chan);
511 int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len);
512 void l2cap_chan_busy(struct l2cap_chan *chan, int busy);
514 #endif /* __L2CAP_H */