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1da177e4 LT |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
19 | ||
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
22 | SOFTWARE IS DISCLAIMED. | |
23 | */ | |
24 | ||
25 | #ifndef __L2CAP_H | |
26 | #define __L2CAP_H | |
27 | ||
28 | /* L2CAP defaults */ | |
47ec1dcd | 29 | #define L2CAP_DEFAULT_MTU 672 |
f2fcfcd6 | 30 | #define L2CAP_DEFAULT_MIN_MTU 48 |
47ec1dcd | 31 | #define L2CAP_DEFAULT_FLUSH_TO 0xffff |
1c2acffb | 32 | #define L2CAP_DEFAULT_TX_WINDOW 63 |
e90bac06 GP |
33 | #define L2CAP_DEFAULT_MAX_TX 3 |
34 | #define L2CAP_DEFAULT_RETRANS_TO 1000 /* 1 second */ | |
35 | #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ | |
c74e560c | 36 | #define L2CAP_DEFAULT_MAX_PDU_SIZE 672 |
c1b4f43b | 37 | #define L2CAP_DEFAULT_ACK_TO 200 |
1da177e4 | 38 | |
4e8402a3 MH |
39 | #define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */ |
40 | #define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */ | |
1da177e4 LT |
41 | |
42 | /* L2CAP socket address */ | |
43 | struct sockaddr_l2 { | |
44 | sa_family_t l2_family; | |
8e036fc3 | 45 | __le16 l2_psm; |
1da177e4 | 46 | bdaddr_t l2_bdaddr; |
f29972de | 47 | __le16 l2_cid; |
1da177e4 LT |
48 | }; |
49 | ||
50 | /* L2CAP socket options */ | |
51 | #define L2CAP_OPTIONS 0x01 | |
52 | struct l2cap_options { | |
53 | __u16 omtu; | |
54 | __u16 imtu; | |
55 | __u16 flush_to; | |
56 | __u8 mode; | |
fcc203c3 | 57 | __u8 fcs; |
14b5aa71 | 58 | __u16 txwin_size; |
1da177e4 LT |
59 | }; |
60 | ||
61 | #define L2CAP_CONNINFO 0x02 | |
62 | struct l2cap_conninfo { | |
63 | __u16 hci_handle; | |
64 | __u8 dev_class[3]; | |
65 | }; | |
66 | ||
67 | #define L2CAP_LM 0x03 | |
68 | #define L2CAP_LM_MASTER 0x0001 | |
69 | #define L2CAP_LM_AUTH 0x0002 | |
70 | #define L2CAP_LM_ENCRYPT 0x0004 | |
71 | #define L2CAP_LM_TRUSTED 0x0008 | |
72 | #define L2CAP_LM_RELIABLE 0x0010 | |
73 | #define L2CAP_LM_SECURE 0x0020 | |
74 | ||
75 | /* L2CAP command codes */ | |
47ec1dcd MH |
76 | #define L2CAP_COMMAND_REJ 0x01 |
77 | #define L2CAP_CONN_REQ 0x02 | |
78 | #define L2CAP_CONN_RSP 0x03 | |
79 | #define L2CAP_CONF_REQ 0x04 | |
80 | #define L2CAP_CONF_RSP 0x05 | |
81 | #define L2CAP_DISCONN_REQ 0x06 | |
82 | #define L2CAP_DISCONN_RSP 0x07 | |
83 | #define L2CAP_ECHO_REQ 0x08 | |
84 | #define L2CAP_ECHO_RSP 0x09 | |
85 | #define L2CAP_INFO_REQ 0x0a | |
86 | #define L2CAP_INFO_RSP 0x0b | |
87 | ||
88 | /* L2CAP feature mask */ | |
89 | #define L2CAP_FEAT_FLOWCTL 0x00000001 | |
90 | #define L2CAP_FEAT_RETRANS 0x00000002 | |
91 | #define L2CAP_FEAT_ERTM 0x00000008 | |
92 | #define L2CAP_FEAT_STREAMING 0x00000010 | |
93 | #define L2CAP_FEAT_FCS 0x00000020 | |
94 | #define L2CAP_FEAT_FIXED_CHAN 0x00000080 | |
95 | ||
96 | /* L2CAP checksum option */ | |
97 | #define L2CAP_FCS_NONE 0x00 | |
98 | #define L2CAP_FCS_CRC16 0x01 | |
1da177e4 | 99 | |
1c2acffb GP |
100 | /* L2CAP Control Field bit masks */ |
101 | #define L2CAP_CTRL_SAR 0xC000 | |
102 | #define L2CAP_CTRL_REQSEQ 0x3F00 | |
103 | #define L2CAP_CTRL_TXSEQ 0x007E | |
104 | #define L2CAP_CTRL_RETRANS 0x0080 | |
105 | #define L2CAP_CTRL_FINAL 0x0080 | |
106 | #define L2CAP_CTRL_POLL 0x0010 | |
107 | #define L2CAP_CTRL_SUPERVISE 0x000C | |
108 | #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ | |
109 | ||
110 | #define L2CAP_CTRL_TXSEQ_SHIFT 1 | |
111 | #define L2CAP_CTRL_REQSEQ_SHIFT 8 | |
8f17154f | 112 | #define L2CAP_CTRL_SAR_SHIFT 14 |
1c2acffb GP |
113 | |
114 | /* L2CAP Supervisory Function */ | |
115 | #define L2CAP_SUPER_RCV_READY 0x0000 | |
116 | #define L2CAP_SUPER_REJECT 0x0004 | |
117 | #define L2CAP_SUPER_RCV_NOT_READY 0x0008 | |
118 | #define L2CAP_SUPER_SELECT_REJECT 0x000C | |
119 | ||
120 | /* L2CAP Segmentation and Reassembly */ | |
121 | #define L2CAP_SDU_UNSEGMENTED 0x0000 | |
122 | #define L2CAP_SDU_START 0x4000 | |
123 | #define L2CAP_SDU_END 0x8000 | |
124 | #define L2CAP_SDU_CONTINUE 0xC000 | |
125 | ||
1da177e4 LT |
126 | /* L2CAP structures */ |
127 | struct l2cap_hdr { | |
8e036fc3 AV |
128 | __le16 len; |
129 | __le16 cid; | |
1da177e4 LT |
130 | } __attribute__ ((packed)); |
131 | #define L2CAP_HDR_SIZE 4 | |
132 | ||
133 | struct l2cap_cmd_hdr { | |
134 | __u8 code; | |
135 | __u8 ident; | |
8e036fc3 | 136 | __le16 len; |
1da177e4 LT |
137 | } __attribute__ ((packed)); |
138 | #define L2CAP_CMD_HDR_SIZE 4 | |
139 | ||
140 | struct l2cap_cmd_rej { | |
8e036fc3 | 141 | __le16 reason; |
1da177e4 LT |
142 | } __attribute__ ((packed)); |
143 | ||
144 | struct l2cap_conn_req { | |
8e036fc3 AV |
145 | __le16 psm; |
146 | __le16 scid; | |
1da177e4 LT |
147 | } __attribute__ ((packed)); |
148 | ||
149 | struct l2cap_conn_rsp { | |
8e036fc3 AV |
150 | __le16 dcid; |
151 | __le16 scid; | |
152 | __le16 result; | |
153 | __le16 status; | |
1da177e4 LT |
154 | } __attribute__ ((packed)); |
155 | ||
8db4dc46 GP |
156 | /* channel indentifier */ |
157 | #define L2CAP_CID_SIGNALING 0x0001 | |
158 | #define L2CAP_CID_CONN_LESS 0x0002 | |
159 | #define L2CAP_CID_DYN_START 0x0040 | |
160 | #define L2CAP_CID_DYN_END 0xffff | |
161 | ||
1da177e4 | 162 | /* connect result */ |
47ec1dcd MH |
163 | #define L2CAP_CR_SUCCESS 0x0000 |
164 | #define L2CAP_CR_PEND 0x0001 | |
165 | #define L2CAP_CR_BAD_PSM 0x0002 | |
166 | #define L2CAP_CR_SEC_BLOCK 0x0003 | |
167 | #define L2CAP_CR_NO_MEM 0x0004 | |
1da177e4 LT |
168 | |
169 | /* connect status */ | |
47ec1dcd MH |
170 | #define L2CAP_CS_NO_INFO 0x0000 |
171 | #define L2CAP_CS_AUTHEN_PEND 0x0001 | |
172 | #define L2CAP_CS_AUTHOR_PEND 0x0002 | |
1da177e4 LT |
173 | |
174 | struct l2cap_conf_req { | |
8e036fc3 AV |
175 | __le16 dcid; |
176 | __le16 flags; | |
1da177e4 LT |
177 | __u8 data[0]; |
178 | } __attribute__ ((packed)); | |
179 | ||
180 | struct l2cap_conf_rsp { | |
8e036fc3 AV |
181 | __le16 scid; |
182 | __le16 flags; | |
183 | __le16 result; | |
1da177e4 LT |
184 | __u8 data[0]; |
185 | } __attribute__ ((packed)); | |
186 | ||
5dee9e7c MH |
187 | #define L2CAP_CONF_SUCCESS 0x0000 |
188 | #define L2CAP_CONF_UNACCEPT 0x0001 | |
189 | #define L2CAP_CONF_REJECT 0x0002 | |
190 | #define L2CAP_CONF_UNKNOWN 0x0003 | |
1da177e4 LT |
191 | |
192 | struct l2cap_conf_opt { | |
193 | __u8 type; | |
194 | __u8 len; | |
195 | __u8 val[0]; | |
196 | } __attribute__ ((packed)); | |
197 | #define L2CAP_CONF_OPT_SIZE 2 | |
198 | ||
589d2746 | 199 | #define L2CAP_CONF_HINT 0x80 |
47ec1dcd | 200 | #define L2CAP_CONF_MASK 0x7f |
589d2746 | 201 | |
1da177e4 LT |
202 | #define L2CAP_CONF_MTU 0x01 |
203 | #define L2CAP_CONF_FLUSH_TO 0x02 | |
204 | #define L2CAP_CONF_QOS 0x03 | |
205 | #define L2CAP_CONF_RFC 0x04 | |
47ec1dcd | 206 | #define L2CAP_CONF_FCS 0x05 |
1da177e4 LT |
207 | |
208 | #define L2CAP_CONF_MAX_SIZE 22 | |
209 | ||
6464f35f MH |
210 | struct l2cap_conf_rfc { |
211 | __u8 mode; | |
212 | __u8 txwin_size; | |
213 | __u8 max_transmit; | |
214 | __le16 retrans_timeout; | |
215 | __le16 monitor_timeout; | |
216 | __le16 max_pdu_size; | |
217 | } __attribute__ ((packed)); | |
218 | ||
219 | #define L2CAP_MODE_BASIC 0x00 | |
220 | #define L2CAP_MODE_RETRANS 0x01 | |
221 | #define L2CAP_MODE_FLOWCTL 0x02 | |
47ec1dcd | 222 | #define L2CAP_MODE_ERTM 0x03 |
c6b03cf9 | 223 | #define L2CAP_MODE_STREAMING 0x04 |
6464f35f | 224 | |
1da177e4 | 225 | struct l2cap_disconn_req { |
8e036fc3 AV |
226 | __le16 dcid; |
227 | __le16 scid; | |
1da177e4 LT |
228 | } __attribute__ ((packed)); |
229 | ||
230 | struct l2cap_disconn_rsp { | |
8e036fc3 AV |
231 | __le16 dcid; |
232 | __le16 scid; | |
1da177e4 LT |
233 | } __attribute__ ((packed)); |
234 | ||
235 | struct l2cap_info_req { | |
8e036fc3 | 236 | __le16 type; |
1da177e4 LT |
237 | } __attribute__ ((packed)); |
238 | ||
239 | struct l2cap_info_rsp { | |
8e036fc3 AV |
240 | __le16 type; |
241 | __le16 result; | |
1da177e4 LT |
242 | __u8 data[0]; |
243 | } __attribute__ ((packed)); | |
244 | ||
245 | /* info type */ | |
246 | #define L2CAP_IT_CL_MTU 0x0001 | |
247 | #define L2CAP_IT_FEAT_MASK 0x0002 | |
e1027a7c | 248 | #define L2CAP_IT_FIXED_CHAN 0x0003 |
1da177e4 LT |
249 | |
250 | /* info result */ | |
251 | #define L2CAP_IR_SUCCESS 0x0000 | |
252 | #define L2CAP_IR_NOTSUPP 0x0001 | |
253 | ||
254 | /* ----- L2CAP connections ----- */ | |
255 | struct l2cap_chan_list { | |
256 | struct sock *head; | |
257 | rwlock_t lock; | |
258 | long num; | |
259 | }; | |
260 | ||
261 | struct l2cap_conn { | |
262 | struct hci_conn *hcon; | |
263 | ||
264 | bdaddr_t *dst; | |
265 | bdaddr_t *src; | |
266 | ||
267 | unsigned int mtu; | |
268 | ||
4e8402a3 MH |
269 | __u32 feat_mask; |
270 | ||
271 | __u8 info_state; | |
272 | __u8 info_ident; | |
273 | ||
274 | struct timer_list info_timer; | |
275 | ||
1da177e4 LT |
276 | spinlock_t lock; |
277 | ||
278 | struct sk_buff *rx_skb; | |
279 | __u32 rx_len; | |
280 | __u8 rx_ident; | |
281 | __u8 tx_ident; | |
282 | ||
2950f21a MH |
283 | __u8 disc_reason; |
284 | ||
1da177e4 LT |
285 | struct l2cap_chan_list chan_list; |
286 | }; | |
287 | ||
4e8402a3 | 288 | #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 |
984947dc MH |
289 | #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 |
290 | #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 | |
4e8402a3 | 291 | |
1da177e4 LT |
292 | /* ----- L2CAP channel and socket info ----- */ |
293 | #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) | |
1c2acffb | 294 | #define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue) |
8f17154f GP |
295 | #define SREJ_QUEUE(sk) (&l2cap_pi(sk)->srej_queue) |
296 | #define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list) | |
297 | ||
298 | struct srej_list { | |
299 | __u8 tx_seq; | |
300 | struct list_head list; | |
301 | }; | |
1da177e4 LT |
302 | |
303 | struct l2cap_pinfo { | |
304 | struct bt_sock bt; | |
8e036fc3 | 305 | __le16 psm; |
1da177e4 LT |
306 | __u16 dcid; |
307 | __u16 scid; | |
308 | ||
309 | __u16 imtu; | |
310 | __u16 omtu; | |
311 | __u16 flush_to; | |
c6b03cf9 | 312 | __u8 mode; |
f2fcfcd6 GP |
313 | __u8 num_conf_req; |
314 | __u8 num_conf_rsp; | |
315 | ||
c6b03cf9 MH |
316 | __u8 fcs; |
317 | __u8 sec_level; | |
2af6b9d5 | 318 | __u8 role_switch; |
c6b03cf9 | 319 | __u8 force_reliable; |
1da177e4 | 320 | |
5dee9e7c MH |
321 | __u8 conf_req[64]; |
322 | __u8 conf_len; | |
1da177e4 | 323 | __u8 conf_state; |
d5392c8f | 324 | __u16 conn_state; |
1da177e4 | 325 | |
1c2acffb GP |
326 | __u8 next_tx_seq; |
327 | __u8 expected_ack_seq; | |
1c2acffb | 328 | __u8 expected_tx_seq; |
8f17154f GP |
329 | __u8 buffer_seq; |
330 | __u8 buffer_seq_srej; | |
ef54fd93 | 331 | __u8 srej_save_reqseq; |
d5392c8f | 332 | __u8 frames_sent; |
1c2acffb | 333 | __u8 unacked_frames; |
e90bac06 | 334 | __u8 retry_count; |
803020c6 | 335 | __u8 num_acked; |
c74e560c GP |
336 | __u16 sdu_len; |
337 | __u16 partial_sdu_len; | |
338 | struct sk_buff *sdu; | |
1c2acffb | 339 | |
1da177e4 LT |
340 | __u8 ident; |
341 | ||
14b5aa71 | 342 | __u8 tx_win; |
f2fcfcd6 GP |
343 | __u8 remote_tx_win; |
344 | __u8 remote_max_tx; | |
345 | __u16 retrans_timeout; | |
346 | __u16 monitor_timeout; | |
1c762159 GP |
347 | __u16 remote_mps; |
348 | __u16 mps; | |
f2fcfcd6 | 349 | |
8e036fc3 | 350 | __le16 sport; |
1da177e4 | 351 | |
e90bac06 GP |
352 | struct timer_list retrans_timer; |
353 | struct timer_list monitor_timer; | |
c1b4f43b | 354 | struct timer_list ack_timer; |
1c2acffb | 355 | struct sk_buff_head tx_queue; |
8f17154f GP |
356 | struct sk_buff_head srej_queue; |
357 | struct srej_list srej_l; | |
1da177e4 LT |
358 | struct l2cap_conn *conn; |
359 | struct sock *next_c; | |
360 | struct sock *prev_c; | |
361 | }; | |
362 | ||
f2fcfcd6 GP |
363 | #define L2CAP_CONF_REQ_SENT 0x01 |
364 | #define L2CAP_CONF_INPUT_DONE 0x02 | |
365 | #define L2CAP_CONF_OUTPUT_DONE 0x04 | |
366 | #define L2CAP_CONF_MTU_DONE 0x08 | |
367 | #define L2CAP_CONF_MODE_DONE 0x10 | |
368 | #define L2CAP_CONF_CONNECT_PEND 0x20 | |
fcc203c3 | 369 | #define L2CAP_CONF_NO_FCS_RECV 0x40 |
f2fcfcd6 GP |
370 | #define L2CAP_CONF_STATE2_DEVICE 0x80 |
371 | ||
372 | #define L2CAP_CONF_MAX_CONF_REQ 2 | |
373 | #define L2CAP_CONF_MAX_CONF_RSP 2 | |
861d6882 | 374 | |
d5392c8f GP |
375 | #define L2CAP_CONN_SAR_SDU 0x0001 |
376 | #define L2CAP_CONN_SREJ_SENT 0x0002 | |
377 | #define L2CAP_CONN_WAIT_F 0x0004 | |
378 | #define L2CAP_CONN_SREJ_ACT 0x0008 | |
379 | #define L2CAP_CONN_SEND_PBIT 0x0010 | |
380 | #define L2CAP_CONN_REMOTE_BUSY 0x0020 | |
381 | #define L2CAP_CONN_LOCAL_BUSY 0x0040 | |
382 | #define L2CAP_CONN_REJ_ACT 0x0080 | |
383 | #define L2CAP_CONN_SEND_FBIT 0x0100 | |
e90bac06 GP |
384 | |
385 | #define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \ | |
386 | jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO)); | |
387 | #define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \ | |
388 | jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO)); | |
c1b4f43b GP |
389 | #define __mod_ack_timer() mod_timer(&l2cap_pi(sk)->ack_timer, \ |
390 | jiffies + msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); | |
c74e560c | 391 | |
1c2acffb GP |
392 | static inline int l2cap_tx_window_full(struct sock *sk) |
393 | { | |
394 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
395 | int sub; | |
396 | ||
397 | sub = (pi->next_tx_seq - pi->expected_ack_seq) % 64; | |
398 | ||
399 | if (sub < 0) | |
400 | sub += 64; | |
401 | ||
402 | return (sub == pi->remote_tx_win); | |
403 | } | |
404 | ||
405 | #define __get_txseq(ctrl) ((ctrl) & L2CAP_CTRL_TXSEQ) >> 1 | |
406 | #define __get_reqseq(ctrl) ((ctrl) & L2CAP_CTRL_REQSEQ) >> 8 | |
407 | #define __is_iframe(ctrl) !((ctrl) & L2CAP_CTRL_FRAME_TYPE) | |
408 | #define __is_sframe(ctrl) (ctrl) & L2CAP_CTRL_FRAME_TYPE | |
c74e560c | 409 | #define __is_sar_start(ctrl) ((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START |
1da177e4 LT |
410 | |
411 | void l2cap_load(void); | |
412 | ||
413 | #endif /* __L2CAP_H */ |