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>
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
30 #define L2CAP_DEFAULT_MTU 672
31 #define L2CAP_DEFAULT_MIN_MTU 48
32 #define L2CAP_DEFAULT_FLUSH_TO 0xffff
33 #define L2CAP_DEFAULT_TX_WINDOW 63
34 #define L2CAP_DEFAULT_MAX_TX 3
35 #define L2CAP_DEFAULT_RETRANS_TO 1000 /* 1 second */
36 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */
37 #define L2CAP_DEFAULT_MAX_PDU_SIZE 672
38 #define L2CAP_DEFAULT_ACK_TO 200
39 #define L2CAP_LOCAL_BUSY_TRIES 12
41 #define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */
42 #define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */
44 /* L2CAP socket address */
46 sa_family_t l2_family;
52 /* L2CAP socket options */
53 #define L2CAP_OPTIONS 0x01
54 struct l2cap_options {
64 #define L2CAP_CONNINFO 0x02
65 struct l2cap_conninfo {
71 #define L2CAP_LM_MASTER 0x0001
72 #define L2CAP_LM_AUTH 0x0002
73 #define L2CAP_LM_ENCRYPT 0x0004
74 #define L2CAP_LM_TRUSTED 0x0008
75 #define L2CAP_LM_RELIABLE 0x0010
76 #define L2CAP_LM_SECURE 0x0020
78 /* L2CAP command codes */
79 #define L2CAP_COMMAND_REJ 0x01
80 #define L2CAP_CONN_REQ 0x02
81 #define L2CAP_CONN_RSP 0x03
82 #define L2CAP_CONF_REQ 0x04
83 #define L2CAP_CONF_RSP 0x05
84 #define L2CAP_DISCONN_REQ 0x06
85 #define L2CAP_DISCONN_RSP 0x07
86 #define L2CAP_ECHO_REQ 0x08
87 #define L2CAP_ECHO_RSP 0x09
88 #define L2CAP_INFO_REQ 0x0a
89 #define L2CAP_INFO_RSP 0x0b
91 /* L2CAP feature mask */
92 #define L2CAP_FEAT_FLOWCTL 0x00000001
93 #define L2CAP_FEAT_RETRANS 0x00000002
94 #define L2CAP_FEAT_ERTM 0x00000008
95 #define L2CAP_FEAT_STREAMING 0x00000010
96 #define L2CAP_FEAT_FCS 0x00000020
97 #define L2CAP_FEAT_FIXED_CHAN 0x00000080
99 /* L2CAP checksum option */
100 #define L2CAP_FCS_NONE 0x00
101 #define L2CAP_FCS_CRC16 0x01
103 /* L2CAP Control Field bit masks */
104 #define L2CAP_CTRL_SAR 0xC000
105 #define L2CAP_CTRL_REQSEQ 0x3F00
106 #define L2CAP_CTRL_TXSEQ 0x007E
107 #define L2CAP_CTRL_RETRANS 0x0080
108 #define L2CAP_CTRL_FINAL 0x0080
109 #define L2CAP_CTRL_POLL 0x0010
110 #define L2CAP_CTRL_SUPERVISE 0x000C
111 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */
113 #define L2CAP_CTRL_TXSEQ_SHIFT 1
114 #define L2CAP_CTRL_REQSEQ_SHIFT 8
115 #define L2CAP_CTRL_SAR_SHIFT 14
117 /* L2CAP Supervisory Function */
118 #define L2CAP_SUPER_RCV_READY 0x0000
119 #define L2CAP_SUPER_REJECT 0x0004
120 #define L2CAP_SUPER_RCV_NOT_READY 0x0008
121 #define L2CAP_SUPER_SELECT_REJECT 0x000C
123 /* L2CAP Segmentation and Reassembly */
124 #define L2CAP_SDU_UNSEGMENTED 0x0000
125 #define L2CAP_SDU_START 0x4000
126 #define L2CAP_SDU_END 0x8000
127 #define L2CAP_SDU_CONTINUE 0xC000
129 /* L2CAP structures */
133 } __attribute__ ((packed));
134 #define L2CAP_HDR_SIZE 4
136 struct l2cap_cmd_hdr {
140 } __attribute__ ((packed));
141 #define L2CAP_CMD_HDR_SIZE 4
143 struct l2cap_cmd_rej {
145 } __attribute__ ((packed));
147 struct l2cap_conn_req {
150 } __attribute__ ((packed));
152 struct l2cap_conn_rsp {
157 } __attribute__ ((packed));
159 /* channel indentifier */
160 #define L2CAP_CID_SIGNALING 0x0001
161 #define L2CAP_CID_CONN_LESS 0x0002
162 #define L2CAP_CID_DYN_START 0x0040
163 #define L2CAP_CID_DYN_END 0xffff
166 #define L2CAP_CR_SUCCESS 0x0000
167 #define L2CAP_CR_PEND 0x0001
168 #define L2CAP_CR_BAD_PSM 0x0002
169 #define L2CAP_CR_SEC_BLOCK 0x0003
170 #define L2CAP_CR_NO_MEM 0x0004
173 #define L2CAP_CS_NO_INFO 0x0000
174 #define L2CAP_CS_AUTHEN_PEND 0x0001
175 #define L2CAP_CS_AUTHOR_PEND 0x0002
177 struct l2cap_conf_req {
181 } __attribute__ ((packed));
183 struct l2cap_conf_rsp {
188 } __attribute__ ((packed));
190 #define L2CAP_CONF_SUCCESS 0x0000
191 #define L2CAP_CONF_UNACCEPT 0x0001
192 #define L2CAP_CONF_REJECT 0x0002
193 #define L2CAP_CONF_UNKNOWN 0x0003
195 struct l2cap_conf_opt {
199 } __attribute__ ((packed));
200 #define L2CAP_CONF_OPT_SIZE 2
202 #define L2CAP_CONF_HINT 0x80
203 #define L2CAP_CONF_MASK 0x7f
205 #define L2CAP_CONF_MTU 0x01
206 #define L2CAP_CONF_FLUSH_TO 0x02
207 #define L2CAP_CONF_QOS 0x03
208 #define L2CAP_CONF_RFC 0x04
209 #define L2CAP_CONF_FCS 0x05
211 #define L2CAP_CONF_MAX_SIZE 22
213 struct l2cap_conf_rfc {
217 __le16 retrans_timeout;
218 __le16 monitor_timeout;
220 } __attribute__ ((packed));
222 #define L2CAP_MODE_BASIC 0x00
223 #define L2CAP_MODE_RETRANS 0x01
224 #define L2CAP_MODE_FLOWCTL 0x02
225 #define L2CAP_MODE_ERTM 0x03
226 #define L2CAP_MODE_STREAMING 0x04
228 struct l2cap_disconn_req {
231 } __attribute__ ((packed));
233 struct l2cap_disconn_rsp {
236 } __attribute__ ((packed));
238 struct l2cap_info_req {
240 } __attribute__ ((packed));
242 struct l2cap_info_rsp {
246 } __attribute__ ((packed));
249 #define L2CAP_IT_CL_MTU 0x0001
250 #define L2CAP_IT_FEAT_MASK 0x0002
251 #define L2CAP_IT_FIXED_CHAN 0x0003
254 #define L2CAP_IR_SUCCESS 0x0000
255 #define L2CAP_IR_NOTSUPP 0x0001
257 /* ----- L2CAP connections ----- */
258 struct l2cap_chan_list {
265 struct hci_conn *hcon;
277 struct timer_list info_timer;
281 struct sk_buff *rx_skb;
288 struct l2cap_chan_list chan_list;
291 struct sock_del_list {
293 struct list_head list;
296 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01
297 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04
298 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08
300 /* ----- L2CAP channel and socket info ----- */
301 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
302 #define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue)
303 #define SREJ_QUEUE(sk) (&l2cap_pi(sk)->srej_queue)
304 #define BUSY_QUEUE(sk) (&l2cap_pi(sk)->busy_queue)
305 #define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list)
309 struct list_head list;
336 __u8 expected_ack_seq;
337 __u8 expected_tx_seq;
339 __u8 buffer_seq_srej;
340 __u8 srej_save_reqseq;
346 __u16 partial_sdu_len;
355 __u16 retrans_timeout;
356 __u16 monitor_timeout;
362 struct timer_list retrans_timer;
363 struct timer_list monitor_timer;
364 struct timer_list ack_timer;
365 struct sk_buff_head tx_queue;
366 struct sk_buff_head srej_queue;
367 struct sk_buff_head busy_queue;
368 struct work_struct busy_work;
369 struct srej_list srej_l;
370 struct l2cap_conn *conn;
375 #define L2CAP_CONF_REQ_SENT 0x01
376 #define L2CAP_CONF_INPUT_DONE 0x02
377 #define L2CAP_CONF_OUTPUT_DONE 0x04
378 #define L2CAP_CONF_MTU_DONE 0x08
379 #define L2CAP_CONF_MODE_DONE 0x10
380 #define L2CAP_CONF_CONNECT_PEND 0x20
381 #define L2CAP_CONF_NO_FCS_RECV 0x40
382 #define L2CAP_CONF_STATE2_DEVICE 0x80
384 #define L2CAP_CONF_MAX_CONF_REQ 2
385 #define L2CAP_CONF_MAX_CONF_RSP 2
387 #define L2CAP_CONN_SAR_SDU 0x0001
388 #define L2CAP_CONN_SREJ_SENT 0x0002
389 #define L2CAP_CONN_WAIT_F 0x0004
390 #define L2CAP_CONN_SREJ_ACT 0x0008
391 #define L2CAP_CONN_SEND_PBIT 0x0010
392 #define L2CAP_CONN_REMOTE_BUSY 0x0020
393 #define L2CAP_CONN_LOCAL_BUSY 0x0040
394 #define L2CAP_CONN_REJ_ACT 0x0080
395 #define L2CAP_CONN_SEND_FBIT 0x0100
396 #define L2CAP_CONN_RNR_SENT 0x0200
397 #define L2CAP_CONN_SAR_RETRY 0x0400
399 #define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \
400 jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO));
401 #define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \
402 jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO));
403 #define __mod_ack_timer() mod_timer(&l2cap_pi(sk)->ack_timer, \
404 jiffies + msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO));
406 static inline int l2cap_tx_window_full(struct sock *sk)
408 struct l2cap_pinfo *pi = l2cap_pi(sk);
411 sub = (pi->next_tx_seq - pi->expected_ack_seq) % 64;
416 return (sub == pi->remote_tx_win);
419 #define __get_txseq(ctrl) ((ctrl) & L2CAP_CTRL_TXSEQ) >> 1
420 #define __get_reqseq(ctrl) ((ctrl) & L2CAP_CTRL_REQSEQ) >> 8
421 #define __is_iframe(ctrl) !((ctrl) & L2CAP_CTRL_FRAME_TYPE)
422 #define __is_sframe(ctrl) (ctrl) & L2CAP_CTRL_FRAME_TYPE
423 #define __is_sar_start(ctrl) ((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START
425 void l2cap_load(void);
427 #endif /* __L2CAP_H */