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1 | /* |
---|---|
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. |
6 | |
7 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
8 | |
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; |
12 | |
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. |
21 | |
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. |
25 | */ |
26 | |
27 | #ifndef __L2CAP_H |
28 | #define __L2CAP_H |
29 | |
30 | #include <asm/unaligned.h> |
31 | #include <linux/atomic.h> |
32 | |
33 | /* L2CAP defaults */ |
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 |
51 | |
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) |
61 | |
62 | /* L2CAP socket address */ |
63 | struct sockaddr_l2 { |
64 | sa_family_t l2_family; |
65 | __le16 l2_psm; |
66 | bdaddr_t l2_bdaddr; |
67 | __le16 l2_cid; |
68 | __u8 l2_bdaddr_type; |
69 | }; |
70 | |
71 | /* L2CAP socket options */ |
72 | #define L2CAP_OPTIONS 0x01 |
73 | struct l2cap_options { |
74 | __u16 omtu; |
75 | __u16 imtu; |
76 | __u16 flush_to; |
77 | __u8 mode; |
78 | __u8 fcs; |
79 | __u8 max_tx; |
80 | __u16 txwin_size; |
81 | }; |
82 | |
83 | #define L2CAP_CONNINFO 0x02 |
84 | struct l2cap_conninfo { |
85 | __u16 hci_handle; |
86 | __u8 dev_class[3]; |
87 | }; |
88 | |
89 | #define L2CAP_LM 0x03 |
90 | #define L2CAP_LM_MASTER 0x0001 |
91 | #define L2CAP_LM_AUTH 0x0002 |
92 | #define L2CAP_LM_ENCRYPT 0x0004 |
93 | #define L2CAP_LM_TRUSTED 0x0008 |
94 | #define L2CAP_LM_RELIABLE 0x0010 |
95 | #define L2CAP_LM_SECURE 0x0020 |
96 | #define L2CAP_LM_FIPS 0x0040 |
97 | |
98 | /* L2CAP command codes */ |
99 | #define L2CAP_COMMAND_REJ 0x01 |
100 | #define L2CAP_CONN_REQ 0x02 |
101 | #define L2CAP_CONN_RSP 0x03 |
102 | #define L2CAP_CONF_REQ 0x04 |
103 | #define L2CAP_CONF_RSP 0x05 |
104 | #define L2CAP_DISCONN_REQ 0x06 |
105 | #define L2CAP_DISCONN_RSP 0x07 |
106 | #define L2CAP_ECHO_REQ 0x08 |
107 | #define L2CAP_ECHO_RSP 0x09 |
108 | #define L2CAP_INFO_REQ 0x0a |
109 | #define L2CAP_INFO_RSP 0x0b |
110 | #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 |
111 | #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 |
112 | #define L2CAP_LE_CONN_REQ 0x14 |
113 | #define L2CAP_LE_CONN_RSP 0x15 |
114 | #define L2CAP_LE_CREDITS 0x16 |
115 | #define L2CAP_ECRED_CONN_REQ 0x17 |
116 | #define L2CAP_ECRED_CONN_RSP 0x18 |
117 | #define L2CAP_ECRED_RECONF_REQ 0x19 |
118 | #define L2CAP_ECRED_RECONF_RSP 0x1a |
119 | |
120 | /* L2CAP extended feature mask */ |
121 | #define L2CAP_FEAT_FLOWCTL 0x00000001 |
122 | #define L2CAP_FEAT_RETRANS 0x00000002 |
123 | #define L2CAP_FEAT_BIDIR_QOS 0x00000004 |
124 | #define L2CAP_FEAT_ERTM 0x00000008 |
125 | #define L2CAP_FEAT_STREAMING 0x00000010 |
126 | #define L2CAP_FEAT_FCS 0x00000020 |
127 | #define L2CAP_FEAT_EXT_FLOW 0x00000040 |
128 | #define L2CAP_FEAT_FIXED_CHAN 0x00000080 |
129 | #define L2CAP_FEAT_EXT_WINDOW 0x00000100 |
130 | #define L2CAP_FEAT_UCD 0x00000200 |
131 | |
132 | /* L2CAP checksum option */ |
133 | #define L2CAP_FCS_NONE 0x00 |
134 | #define L2CAP_FCS_CRC16 0x01 |
135 | |
136 | /* L2CAP fixed channels */ |
137 | #define L2CAP_FC_SIG_BREDR 0x02 |
138 | #define L2CAP_FC_CONNLESS 0x04 |
139 | #define L2CAP_FC_ATT 0x10 |
140 | #define L2CAP_FC_SIG_LE 0x20 |
141 | #define L2CAP_FC_SMP_LE 0x40 |
142 | #define L2CAP_FC_SMP_BREDR 0x80 |
143 | |
144 | /* L2CAP Control Field bit masks */ |
145 | #define L2CAP_CTRL_SAR 0xC000 |
146 | #define L2CAP_CTRL_REQSEQ 0x3F00 |
147 | #define L2CAP_CTRL_TXSEQ 0x007E |
148 | #define L2CAP_CTRL_SUPERVISE 0x000C |
149 | |
150 | #define L2CAP_CTRL_RETRANS 0x0080 |
151 | #define L2CAP_CTRL_FINAL 0x0080 |
152 | #define L2CAP_CTRL_POLL 0x0010 |
153 | #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ |
154 | |
155 | #define L2CAP_CTRL_TXSEQ_SHIFT 1 |
156 | #define L2CAP_CTRL_SUPER_SHIFT 2 |
157 | #define L2CAP_CTRL_POLL_SHIFT 4 |
158 | #define L2CAP_CTRL_FINAL_SHIFT 7 |
159 | #define L2CAP_CTRL_REQSEQ_SHIFT 8 |
160 | #define L2CAP_CTRL_SAR_SHIFT 14 |
161 | |
162 | /* L2CAP Extended Control Field bit mask */ |
163 | #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 |
164 | #define L2CAP_EXT_CTRL_SAR 0x00030000 |
165 | #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 |
166 | #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC |
167 | |
168 | #define L2CAP_EXT_CTRL_POLL 0x00040000 |
169 | #define L2CAP_EXT_CTRL_FINAL 0x00000002 |
170 | #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ |
171 | |
172 | #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 |
173 | #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 |
174 | #define L2CAP_EXT_CTRL_SAR_SHIFT 16 |
175 | #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 |
176 | #define L2CAP_EXT_CTRL_POLL_SHIFT 18 |
177 | #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 |
178 | |
179 | /* L2CAP Supervisory Function */ |
180 | #define L2CAP_SUPER_RR 0x00 |
181 | #define L2CAP_SUPER_REJ 0x01 |
182 | #define L2CAP_SUPER_RNR 0x02 |
183 | #define L2CAP_SUPER_SREJ 0x03 |
184 | |
185 | /* L2CAP Segmentation and Reassembly */ |
186 | #define L2CAP_SAR_UNSEGMENTED 0x00 |
187 | #define L2CAP_SAR_START 0x01 |
188 | #define L2CAP_SAR_END 0x02 |
189 | #define L2CAP_SAR_CONTINUE 0x03 |
190 | |
191 | /* L2CAP Command rej. reasons */ |
192 | #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 |
193 | #define L2CAP_REJ_MTU_EXCEEDED 0x0001 |
194 | #define L2CAP_REJ_INVALID_CID 0x0002 |
195 | |
196 | /* L2CAP structures */ |
197 | struct l2cap_hdr { |
198 | __le16 len; |
199 | __le16 cid; |
200 | } __packed; |
201 | #define L2CAP_LEN_SIZE 2 |
202 | #define L2CAP_HDR_SIZE 4 |
203 | #define L2CAP_ENH_HDR_SIZE 6 |
204 | #define L2CAP_EXT_HDR_SIZE 8 |
205 | |
206 | #define L2CAP_FCS_SIZE 2 |
207 | #define L2CAP_SDULEN_SIZE 2 |
208 | #define L2CAP_PSMLEN_SIZE 2 |
209 | #define L2CAP_ENH_CTRL_SIZE 2 |
210 | #define L2CAP_EXT_CTRL_SIZE 4 |
211 | |
212 | struct l2cap_cmd_hdr { |
213 | __u8 code; |
214 | __u8 ident; |
215 | __le16 len; |
216 | } __packed; |
217 | #define L2CAP_CMD_HDR_SIZE 4 |
218 | |
219 | struct l2cap_cmd_rej_unk { |
220 | __le16 reason; |
221 | } __packed; |
222 | |
223 | struct l2cap_cmd_rej_mtu { |
224 | __le16 reason; |
225 | __le16 max_mtu; |
226 | } __packed; |
227 | |
228 | struct l2cap_cmd_rej_cid { |
229 | __le16 reason; |
230 | __le16 scid; |
231 | __le16 dcid; |
232 | } __packed; |
233 | |
234 | struct l2cap_conn_req { |
235 | __le16 psm; |
236 | __le16 scid; |
237 | } __packed; |
238 | |
239 | struct l2cap_conn_rsp { |
240 | __le16 dcid; |
241 | __le16 scid; |
242 | __le16 result; |
243 | __le16 status; |
244 | } __packed; |
245 | |
246 | /* protocol/service multiplexer (PSM) */ |
247 | #define L2CAP_PSM_SDP 0x0001 |
248 | #define L2CAP_PSM_RFCOMM 0x0003 |
249 | #define L2CAP_PSM_3DSP 0x0021 |
250 | #define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */ |
251 | |
252 | #define L2CAP_PSM_DYN_START 0x1001 |
253 | #define L2CAP_PSM_DYN_END 0xffff |
254 | #define L2CAP_PSM_AUTO_END 0x10ff |
255 | #define L2CAP_PSM_LE_DYN_START 0x0080 |
256 | #define L2CAP_PSM_LE_DYN_END 0x00ff |
257 | |
258 | /* channel identifier */ |
259 | #define L2CAP_CID_SIGNALING 0x0001 |
260 | #define L2CAP_CID_CONN_LESS 0x0002 |
261 | #define L2CAP_CID_ATT 0x0004 |
262 | #define L2CAP_CID_LE_SIGNALING 0x0005 |
263 | #define L2CAP_CID_SMP 0x0006 |
264 | #define L2CAP_CID_SMP_BREDR 0x0007 |
265 | #define L2CAP_CID_DYN_START 0x0040 |
266 | #define L2CAP_CID_DYN_END 0xffff |
267 | #define L2CAP_CID_LE_DYN_END 0x007f |
268 | |
269 | /* connect/create channel results */ |
270 | #define L2CAP_CR_SUCCESS 0x0000 |
271 | #define L2CAP_CR_PEND 0x0001 |
272 | #define L2CAP_CR_BAD_PSM 0x0002 |
273 | #define L2CAP_CR_SEC_BLOCK 0x0003 |
274 | #define L2CAP_CR_NO_MEM 0x0004 |
275 | #define L2CAP_CR_INVALID_SCID 0x0006 |
276 | #define L2CAP_CR_SCID_IN_USE 0x0007 |
277 | |
278 | /* credit based connect results */ |
279 | #define L2CAP_CR_LE_SUCCESS 0x0000 |
280 | #define L2CAP_CR_LE_BAD_PSM 0x0002 |
281 | #define L2CAP_CR_LE_NO_MEM 0x0004 |
282 | #define L2CAP_CR_LE_AUTHENTICATION 0x0005 |
283 | #define L2CAP_CR_LE_AUTHORIZATION 0x0006 |
284 | #define L2CAP_CR_LE_BAD_KEY_SIZE 0x0007 |
285 | #define L2CAP_CR_LE_ENCRYPTION 0x0008 |
286 | #define L2CAP_CR_LE_INVALID_SCID 0x0009 |
287 | #define L2CAP_CR_LE_SCID_IN_USE 0X000A |
288 | #define L2CAP_CR_LE_UNACCEPT_PARAMS 0X000B |
289 | #define L2CAP_CR_LE_INVALID_PARAMS 0X000C |
290 | |
291 | /* connect/create channel status */ |
292 | #define L2CAP_CS_NO_INFO 0x0000 |
293 | #define L2CAP_CS_AUTHEN_PEND 0x0001 |
294 | #define L2CAP_CS_AUTHOR_PEND 0x0002 |
295 | |
296 | struct l2cap_conf_req { |
297 | __le16 dcid; |
298 | __le16 flags; |
299 | __u8 data[]; |
300 | } __packed; |
301 | |
302 | struct l2cap_conf_rsp { |
303 | __le16 scid; |
304 | __le16 flags; |
305 | __le16 result; |
306 | __u8 data[]; |
307 | } __packed; |
308 | |
309 | #define L2CAP_CONF_SUCCESS 0x0000 |
310 | #define L2CAP_CONF_UNACCEPT 0x0001 |
311 | #define L2CAP_CONF_REJECT 0x0002 |
312 | #define L2CAP_CONF_UNKNOWN 0x0003 |
313 | #define L2CAP_CONF_PENDING 0x0004 |
314 | #define L2CAP_CONF_EFS_REJECT 0x0005 |
315 | |
316 | /* configuration req/rsp continuation flag */ |
317 | #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 |
318 | |
319 | struct l2cap_conf_opt { |
320 | __u8 type; |
321 | __u8 len; |
322 | __u8 val[]; |
323 | } __packed; |
324 | #define L2CAP_CONF_OPT_SIZE 2 |
325 | |
326 | #define L2CAP_CONF_HINT 0x80 |
327 | #define L2CAP_CONF_MASK 0x7f |
328 | |
329 | #define L2CAP_CONF_MTU 0x01 |
330 | #define L2CAP_CONF_FLUSH_TO 0x02 |
331 | #define L2CAP_CONF_QOS 0x03 |
332 | #define L2CAP_CONF_RFC 0x04 |
333 | #define L2CAP_CONF_FCS 0x05 |
334 | #define L2CAP_CONF_EFS 0x06 |
335 | #define L2CAP_CONF_EWS 0x07 |
336 | |
337 | #define L2CAP_CONF_MAX_SIZE 22 |
338 | |
339 | struct l2cap_conf_rfc { |
340 | __u8 mode; |
341 | __u8 txwin_size; |
342 | __u8 max_transmit; |
343 | __le16 retrans_timeout; |
344 | __le16 monitor_timeout; |
345 | __le16 max_pdu_size; |
346 | } __packed; |
347 | |
348 | #define L2CAP_MODE_BASIC 0x00 |
349 | #define L2CAP_MODE_RETRANS 0x01 |
350 | #define L2CAP_MODE_FLOWCTL 0x02 |
351 | #define L2CAP_MODE_ERTM 0x03 |
352 | #define L2CAP_MODE_STREAMING 0x04 |
353 | |
354 | /* Unlike the above this one doesn't actually map to anything that would |
355 | * ever be sent over the air. Therefore, use a value that's unlikely to |
356 | * ever be used in the BR/EDR configuration phase. |
357 | */ |
358 | #define L2CAP_MODE_LE_FLOWCTL 0x80 |
359 | #define L2CAP_MODE_EXT_FLOWCTL 0x81 |
360 | |
361 | struct l2cap_conf_efs { |
362 | __u8 id; |
363 | __u8 stype; |
364 | __le16 msdu; |
365 | __le32 sdu_itime; |
366 | __le32 acc_lat; |
367 | __le32 flush_to; |
368 | } __packed; |
369 | |
370 | #define L2CAP_SERV_NOTRAFIC 0x00 |
371 | #define L2CAP_SERV_BESTEFFORT 0x01 |
372 | #define L2CAP_SERV_GUARANTEED 0x02 |
373 | |
374 | #define L2CAP_BESTEFFORT_ID 0x01 |
375 | |
376 | struct l2cap_disconn_req { |
377 | __le16 dcid; |
378 | __le16 scid; |
379 | } __packed; |
380 | |
381 | struct l2cap_disconn_rsp { |
382 | __le16 dcid; |
383 | __le16 scid; |
384 | } __packed; |
385 | |
386 | struct l2cap_info_req { |
387 | __le16 type; |
388 | } __packed; |
389 | |
390 | struct l2cap_info_rsp { |
391 | __le16 type; |
392 | __le16 result; |
393 | __u8 data[]; |
394 | } __packed; |
395 | |
396 | #define L2CAP_MR_SUCCESS 0x0000 |
397 | #define L2CAP_MR_PEND 0x0001 |
398 | #define L2CAP_MR_BAD_ID 0x0002 |
399 | #define L2CAP_MR_SAME_ID 0x0003 |
400 | #define L2CAP_MR_NOT_SUPP 0x0004 |
401 | #define L2CAP_MR_COLLISION 0x0005 |
402 | #define L2CAP_MR_NOT_ALLOWED 0x0006 |
403 | |
404 | struct l2cap_move_chan_cfm { |
405 | __le16 icid; |
406 | __le16 result; |
407 | } __packed; |
408 | |
409 | #define L2CAP_MC_CONFIRMED 0x0000 |
410 | #define L2CAP_MC_UNCONFIRMED 0x0001 |
411 | |
412 | struct l2cap_move_chan_cfm_rsp { |
413 | __le16 icid; |
414 | } __packed; |
415 | |
416 | /* info type */ |
417 | #define L2CAP_IT_CL_MTU 0x0001 |
418 | #define L2CAP_IT_FEAT_MASK 0x0002 |
419 | #define L2CAP_IT_FIXED_CHAN 0x0003 |
420 | |
421 | /* info result */ |
422 | #define L2CAP_IR_SUCCESS 0x0000 |
423 | #define L2CAP_IR_NOTSUPP 0x0001 |
424 | |
425 | struct l2cap_conn_param_update_req { |
426 | __le16 min; |
427 | __le16 max; |
428 | __le16 latency; |
429 | __le16 to_multiplier; |
430 | } __packed; |
431 | |
432 | struct l2cap_conn_param_update_rsp { |
433 | __le16 result; |
434 | } __packed; |
435 | |
436 | /* Connection Parameters result */ |
437 | #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 |
438 | #define L2CAP_CONN_PARAM_REJECTED 0x0001 |
439 | |
440 | struct l2cap_le_conn_req { |
441 | __le16 psm; |
442 | __le16 scid; |
443 | __le16 mtu; |
444 | __le16 mps; |
445 | __le16 credits; |
446 | } __packed; |
447 | |
448 | struct l2cap_le_conn_rsp { |
449 | __le16 dcid; |
450 | __le16 mtu; |
451 | __le16 mps; |
452 | __le16 credits; |
453 | __le16 result; |
454 | } __packed; |
455 | |
456 | struct l2cap_le_credits { |
457 | __le16 cid; |
458 | __le16 credits; |
459 | } __packed; |
460 | |
461 | #define L2CAP_ECRED_MIN_MTU 64 |
462 | #define L2CAP_ECRED_MIN_MPS 64 |
463 | #define L2CAP_ECRED_MAX_CID 5 |
464 | |
465 | struct l2cap_ecred_conn_req { |
466 | __le16 psm; |
467 | __le16 mtu; |
468 | __le16 mps; |
469 | __le16 credits; |
470 | __le16 scid[]; |
471 | } __packed; |
472 | |
473 | struct l2cap_ecred_conn_rsp { |
474 | __le16 mtu; |
475 | __le16 mps; |
476 | __le16 credits; |
477 | __le16 result; |
478 | __le16 dcid[]; |
479 | }; |
480 | |
481 | struct l2cap_ecred_reconf_req { |
482 | __le16 mtu; |
483 | __le16 mps; |
484 | __le16 scid[]; |
485 | } __packed; |
486 | |
487 | #define L2CAP_RECONF_SUCCESS 0x0000 |
488 | #define L2CAP_RECONF_INVALID_MTU 0x0001 |
489 | #define L2CAP_RECONF_INVALID_MPS 0x0002 |
490 | |
491 | struct l2cap_ecred_reconf_rsp { |
492 | __le16 result; |
493 | } __packed; |
494 | |
495 | /* ----- L2CAP channels and connections ----- */ |
496 | struct l2cap_seq_list { |
497 | __u16 head; |
498 | __u16 tail; |
499 | __u16 mask; |
500 | __u16 *list; |
501 | }; |
502 | |
503 | #define L2CAP_SEQ_LIST_CLEAR 0xFFFF |
504 | #define L2CAP_SEQ_LIST_TAIL 0x8000 |
505 | |
506 | struct l2cap_chan { |
507 | struct l2cap_conn *conn; |
508 | struct kref kref; |
509 | atomic_t nesting; |
510 | |
511 | __u8 state; |
512 | |
513 | bdaddr_t dst; |
514 | __u8 dst_type; |
515 | bdaddr_t src; |
516 | __u8 src_type; |
517 | __le16 psm; |
518 | __le16 sport; |
519 | __u16 dcid; |
520 | __u16 scid; |
521 | |
522 | __u16 imtu; |
523 | __u16 omtu; |
524 | __u16 flush_to; |
525 | __u8 mode; |
526 | __u8 chan_type; |
527 | __u8 chan_policy; |
528 | |
529 | __u8 sec_level; |
530 | |
531 | __u8 ident; |
532 | |
533 | __u8 conf_req[64]; |
534 | __u8 conf_len; |
535 | __u8 num_conf_req; |
536 | __u8 num_conf_rsp; |
537 | |
538 | __u8 fcs; |
539 | |
540 | __u16 tx_win; |
541 | __u16 tx_win_max; |
542 | __u16 ack_win; |
543 | __u8 max_tx; |
544 | __u16 retrans_timeout; |
545 | __u16 monitor_timeout; |
546 | __u16 mps; |
547 | |
548 | __u16 tx_credits; |
549 | __u16 rx_credits; |
550 | |
551 | __u8 tx_state; |
552 | __u8 rx_state; |
553 | |
554 | unsigned long conf_state; |
555 | unsigned long conn_state; |
556 | unsigned long flags; |
557 | |
558 | __u16 next_tx_seq; |
559 | __u16 expected_ack_seq; |
560 | __u16 expected_tx_seq; |
561 | __u16 buffer_seq; |
562 | __u16 srej_save_reqseq; |
563 | __u16 last_acked_seq; |
564 | __u16 frames_sent; |
565 | __u16 unacked_frames; |
566 | __u8 retry_count; |
567 | __u16 sdu_len; |
568 | struct sk_buff *sdu; |
569 | struct sk_buff *sdu_last_frag; |
570 | |
571 | __u16 remote_tx_win; |
572 | __u8 remote_max_tx; |
573 | __u16 remote_mps; |
574 | |
575 | __u8 local_id; |
576 | __u8 local_stype; |
577 | __u16 local_msdu; |
578 | __u32 local_sdu_itime; |
579 | __u32 local_acc_lat; |
580 | __u32 local_flush_to; |
581 | |
582 | __u8 remote_id; |
583 | __u8 remote_stype; |
584 | __u16 remote_msdu; |
585 | __u32 remote_sdu_itime; |
586 | __u32 remote_acc_lat; |
587 | __u32 remote_flush_to; |
588 | |
589 | struct delayed_work chan_timer; |
590 | struct delayed_work retrans_timer; |
591 | struct delayed_work monitor_timer; |
592 | struct delayed_work ack_timer; |
593 | |
594 | struct sk_buff *tx_send_head; |
595 | struct sk_buff_head tx_q; |
596 | struct sk_buff_head srej_q; |
597 | struct l2cap_seq_list srej_list; |
598 | struct l2cap_seq_list retrans_list; |
599 | |
600 | struct list_head list; |
601 | struct list_head global_l; |
602 | |
603 | void *data; |
604 | const struct l2cap_ops *ops; |
605 | struct mutex lock; |
606 | }; |
607 | |
608 | struct l2cap_ops { |
609 | char *name; |
610 | |
611 | struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); |
612 | int (*recv) (struct l2cap_chan * chan, |
613 | struct sk_buff *skb); |
614 | void (*teardown) (struct l2cap_chan *chan, int err); |
615 | void (*close) (struct l2cap_chan *chan); |
616 | void (*state_change) (struct l2cap_chan *chan, |
617 | int state, int err); |
618 | void (*ready) (struct l2cap_chan *chan); |
619 | void (*defer) (struct l2cap_chan *chan); |
620 | void (*resume) (struct l2cap_chan *chan); |
621 | void (*suspend) (struct l2cap_chan *chan); |
622 | void (*set_shutdown) (struct l2cap_chan *chan); |
623 | long (*get_sndtimeo) (struct l2cap_chan *chan); |
624 | struct pid *(*get_peer_pid) (struct l2cap_chan *chan); |
625 | struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, |
626 | unsigned long hdr_len, |
627 | unsigned long len, int nb); |
628 | int (*filter) (struct l2cap_chan * chan, |
629 | struct sk_buff *skb); |
630 | }; |
631 | |
632 | struct l2cap_conn { |
633 | struct hci_conn *hcon; |
634 | struct hci_chan *hchan; |
635 | |
636 | unsigned int mtu; |
637 | |
638 | __u32 feat_mask; |
639 | __u8 remote_fixed_chan; |
640 | __u8 local_fixed_chan; |
641 | |
642 | __u8 info_state; |
643 | __u8 info_ident; |
644 | |
645 | struct delayed_work info_timer; |
646 | |
647 | struct sk_buff *rx_skb; |
648 | __u32 rx_len; |
649 | __u8 tx_ident; |
650 | struct mutex ident_lock; |
651 | |
652 | struct sk_buff_head pending_rx; |
653 | struct work_struct pending_rx_work; |
654 | |
655 | struct delayed_work id_addr_timer; |
656 | |
657 | __u8 disc_reason; |
658 | |
659 | struct l2cap_chan *smp; |
660 | |
661 | struct list_head chan_l; |
662 | struct mutex chan_lock; |
663 | struct kref ref; |
664 | struct list_head users; |
665 | }; |
666 | |
667 | struct l2cap_user { |
668 | struct list_head list; |
669 | int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); |
670 | void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); |
671 | }; |
672 | |
673 | #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 |
674 | #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 |
675 | #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 |
676 | |
677 | #define L2CAP_CHAN_RAW 1 |
678 | #define L2CAP_CHAN_CONN_LESS 2 |
679 | #define L2CAP_CHAN_CONN_ORIENTED 3 |
680 | #define L2CAP_CHAN_FIXED 4 |
681 | |
682 | /* ----- L2CAP socket info ----- */ |
683 | #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) |
684 | |
685 | struct l2cap_pinfo { |
686 | struct bt_sock bt; |
687 | struct l2cap_chan *chan; |
688 | struct sk_buff *rx_busy_skb; |
689 | }; |
690 | |
691 | enum { |
692 | CONF_REQ_SENT, |
693 | CONF_INPUT_DONE, |
694 | CONF_OUTPUT_DONE, |
695 | CONF_MTU_DONE, |
696 | CONF_MODE_DONE, |
697 | CONF_CONNECT_PEND, |
698 | CONF_RECV_NO_FCS, |
699 | CONF_STATE2_DEVICE, |
700 | CONF_EWS_RECV, |
701 | CONF_LOC_CONF_PEND, |
702 | CONF_REM_CONF_PEND, |
703 | CONF_NOT_COMPLETE, |
704 | }; |
705 | |
706 | #define L2CAP_CONF_MAX_CONF_REQ 2 |
707 | #define L2CAP_CONF_MAX_CONF_RSP 2 |
708 | |
709 | enum { |
710 | CONN_SREJ_SENT, |
711 | CONN_WAIT_F, |
712 | CONN_SREJ_ACT, |
713 | CONN_SEND_PBIT, |
714 | CONN_REMOTE_BUSY, |
715 | CONN_LOCAL_BUSY, |
716 | CONN_REJ_ACT, |
717 | CONN_SEND_FBIT, |
718 | CONN_RNR_SENT, |
719 | }; |
720 | |
721 | /* Definitions for flags in l2cap_chan */ |
722 | enum { |
723 | FLAG_ROLE_SWITCH, |
724 | FLAG_FORCE_ACTIVE, |
725 | FLAG_FORCE_RELIABLE, |
726 | FLAG_FLUSHABLE, |
727 | FLAG_EXT_CTRL, |
728 | FLAG_EFS_ENABLE, |
729 | FLAG_DEFER_SETUP, |
730 | FLAG_LE_CONN_REQ_SENT, |
731 | FLAG_ECRED_CONN_REQ_SENT, |
732 | FLAG_PENDING_SECURITY, |
733 | FLAG_HOLD_HCI_CONN, |
734 | }; |
735 | |
736 | /* Lock nesting levels for L2CAP channels. We need these because lockdep |
737 | * otherwise considers all channels equal and will e.g. complain about a |
738 | * connection oriented channel triggering SMP procedures or a listening |
739 | * channel creating and locking a child channel. |
740 | */ |
741 | enum { |
742 | L2CAP_NESTING_SMP, |
743 | L2CAP_NESTING_NORMAL, |
744 | L2CAP_NESTING_PARENT, |
745 | }; |
746 | |
747 | enum { |
748 | L2CAP_TX_STATE_XMIT, |
749 | L2CAP_TX_STATE_WAIT_F, |
750 | }; |
751 | |
752 | enum { |
753 | L2CAP_RX_STATE_RECV, |
754 | L2CAP_RX_STATE_SREJ_SENT, |
755 | L2CAP_RX_STATE_MOVE, |
756 | L2CAP_RX_STATE_WAIT_P, |
757 | L2CAP_RX_STATE_WAIT_F, |
758 | }; |
759 | |
760 | enum { |
761 | L2CAP_TXSEQ_EXPECTED, |
762 | L2CAP_TXSEQ_EXPECTED_SREJ, |
763 | L2CAP_TXSEQ_UNEXPECTED, |
764 | L2CAP_TXSEQ_UNEXPECTED_SREJ, |
765 | L2CAP_TXSEQ_DUPLICATE, |
766 | L2CAP_TXSEQ_DUPLICATE_SREJ, |
767 | L2CAP_TXSEQ_INVALID, |
768 | L2CAP_TXSEQ_INVALID_IGNORE, |
769 | }; |
770 | |
771 | enum { |
772 | L2CAP_EV_DATA_REQUEST, |
773 | L2CAP_EV_LOCAL_BUSY_DETECTED, |
774 | L2CAP_EV_LOCAL_BUSY_CLEAR, |
775 | L2CAP_EV_RECV_REQSEQ_AND_FBIT, |
776 | L2CAP_EV_RECV_FBIT, |
777 | L2CAP_EV_RETRANS_TO, |
778 | L2CAP_EV_MONITOR_TO, |
779 | L2CAP_EV_EXPLICIT_POLL, |
780 | L2CAP_EV_RECV_IFRAME, |
781 | L2CAP_EV_RECV_RR, |
782 | L2CAP_EV_RECV_REJ, |
783 | L2CAP_EV_RECV_RNR, |
784 | L2CAP_EV_RECV_SREJ, |
785 | L2CAP_EV_RECV_FRAME, |
786 | }; |
787 | |
788 | enum { |
789 | L2CAP_MOVE_ROLE_NONE, |
790 | L2CAP_MOVE_ROLE_INITIATOR, |
791 | L2CAP_MOVE_ROLE_RESPONDER, |
792 | }; |
793 | |
794 | enum { |
795 | L2CAP_MOVE_STABLE, |
796 | L2CAP_MOVE_WAIT_REQ, |
797 | L2CAP_MOVE_WAIT_RSP, |
798 | L2CAP_MOVE_WAIT_RSP_SUCCESS, |
799 | L2CAP_MOVE_WAIT_CONFIRM, |
800 | L2CAP_MOVE_WAIT_CONFIRM_RSP, |
801 | L2CAP_MOVE_WAIT_LOGICAL_COMP, |
802 | L2CAP_MOVE_WAIT_LOGICAL_CFM, |
803 | L2CAP_MOVE_WAIT_LOCAL_BUSY, |
804 | L2CAP_MOVE_WAIT_PREPARE, |
805 | }; |
806 | |
807 | void l2cap_chan_hold(struct l2cap_chan *c); |
808 | struct l2cap_chan *l2cap_chan_hold_unless_zero(struct l2cap_chan *c); |
809 | void l2cap_chan_put(struct l2cap_chan *c); |
810 | |
811 | static inline void l2cap_chan_lock(struct l2cap_chan *chan) |
812 | { |
813 | mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); |
814 | } |
815 | |
816 | static inline void l2cap_chan_unlock(struct l2cap_chan *chan) |
817 | { |
818 | mutex_unlock(&chan->lock); |
819 | } |
820 | |
821 | static inline void l2cap_set_timer(struct l2cap_chan *chan, |
822 | struct delayed_work *work, long timeout) |
823 | { |
824 | BT_DBG("chan %p state %s timeout %ld", chan, |
825 | state_to_string(chan->state), timeout); |
826 | |
827 | /* If delayed work cancelled do not hold(chan) |
828 | since it is already done with previous set_timer */ |
829 | if (!cancel_delayed_work(work)) |
830 | l2cap_chan_hold(chan); |
831 | |
832 | schedule_delayed_work(work, timeout); |
833 | } |
834 | |
835 | static inline bool l2cap_clear_timer(struct l2cap_chan *chan, |
836 | struct delayed_work *work) |
837 | { |
838 | bool ret; |
839 | |
840 | /* put(chan) if delayed work cancelled otherwise it |
841 | is done in delayed work function */ |
842 | ret = cancel_delayed_work(work); |
843 | if (ret) |
844 | l2cap_chan_put(chan); |
845 | |
846 | return ret; |
847 | } |
848 | |
849 | #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) |
850 | #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) |
851 | #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) |
852 | #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) |
853 | #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ |
854 | msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); |
855 | #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) |
856 | |
857 | static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) |
858 | { |
859 | if (seq1 >= seq2) |
860 | return seq1 - seq2; |
861 | else |
862 | return chan->tx_win_max + 1 - seq2 + seq1; |
863 | } |
864 | |
865 | static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) |
866 | { |
867 | return (seq + 1) % (chan->tx_win_max + 1); |
868 | } |
869 | |
870 | static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) |
871 | { |
872 | return NULL; |
873 | } |
874 | |
875 | static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) |
876 | { |
877 | return -ENOSYS; |
878 | } |
879 | |
880 | static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, |
881 | unsigned long hdr_len, |
882 | unsigned long len, int nb) |
883 | { |
884 | return ERR_PTR(-ENOSYS); |
885 | } |
886 | |
887 | static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) |
888 | { |
889 | } |
890 | |
891 | static inline void l2cap_chan_no_close(struct l2cap_chan *chan) |
892 | { |
893 | } |
894 | |
895 | static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) |
896 | { |
897 | } |
898 | |
899 | static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, |
900 | int state, int err) |
901 | { |
902 | } |
903 | |
904 | static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) |
905 | { |
906 | } |
907 | |
908 | static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) |
909 | { |
910 | } |
911 | |
912 | static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) |
913 | { |
914 | } |
915 | |
916 | static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) |
917 | { |
918 | } |
919 | |
920 | static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) |
921 | { |
922 | return 0; |
923 | } |
924 | |
925 | extern bool disable_ertm; |
926 | extern bool enable_ecred; |
927 | |
928 | int l2cap_init_sockets(void); |
929 | void l2cap_cleanup_sockets(void); |
930 | bool l2cap_is_socket(struct socket *sock); |
931 | |
932 | void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); |
933 | void __l2cap_ecred_conn_rsp_defer(struct l2cap_chan *chan); |
934 | void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); |
935 | |
936 | int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); |
937 | int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); |
938 | |
939 | struct l2cap_chan *l2cap_chan_create(void); |
940 | void l2cap_chan_close(struct l2cap_chan *chan, int reason); |
941 | int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, |
942 | bdaddr_t *dst, u8 dst_type, u16 timeout); |
943 | int l2cap_chan_reconfigure(struct l2cap_chan *chan, __u16 mtu); |
944 | int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len); |
945 | void l2cap_chan_busy(struct l2cap_chan *chan, int busy); |
946 | int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); |
947 | void l2cap_chan_set_defaults(struct l2cap_chan *chan); |
948 | int l2cap_ertm_init(struct l2cap_chan *chan); |
949 | void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); |
950 | void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); |
951 | typedef void (*l2cap_chan_func_t)(struct l2cap_chan *chan, void *data); |
952 | void l2cap_chan_list(struct l2cap_conn *conn, l2cap_chan_func_t func, |
953 | void *data); |
954 | void l2cap_chan_del(struct l2cap_chan *chan, int err); |
955 | void l2cap_send_conn_req(struct l2cap_chan *chan); |
956 | void l2cap_move_start(struct l2cap_chan *chan); |
957 | void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, |
958 | u8 status); |
959 | void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); |
960 | |
961 | struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); |
962 | void l2cap_conn_put(struct l2cap_conn *conn); |
963 | |
964 | int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); |
965 | void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); |
966 | |
967 | #endif /* __L2CAP_H */ |
968 |
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