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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 | ||
51 | #define L2CAP_DISC_TIMEOUT msecs_to_jiffies(100) | |
52 | #define L2CAP_DISC_REJ_TIMEOUT msecs_to_jiffies(5000) | |
53 | #define L2CAP_ENC_TIMEOUT msecs_to_jiffies(5000) | |
54 | #define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000) | |
55 | #define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000) | |
56 | #define L2CAP_MOVE_TIMEOUT msecs_to_jiffies(4000) | |
57 | #define L2CAP_MOVE_ERTX_TIMEOUT msecs_to_jiffies(60000) | |
58 | #define L2CAP_WAIT_ACK_POLL_PERIOD msecs_to_jiffies(200) | |
59 | #define L2CAP_WAIT_ACK_TIMEOUT msecs_to_jiffies(10000) | |
60 | ||
61 | #define L2CAP_A2MP_DEFAULT_MTU 670 | |
62 | ||
63 | /* L2CAP socket address */ | |
64 | struct sockaddr_l2 { | |
65 | sa_family_t l2_family; | |
66 | __le16 l2_psm; | |
67 | bdaddr_t l2_bdaddr; | |
68 | __le16 l2_cid; | |
69 | __u8 l2_bdaddr_type; | |
70 | }; | |
71 | ||
72 | /* L2CAP socket options */ | |
73 | #define L2CAP_OPTIONS 0x01 | |
74 | struct l2cap_options { | |
75 | __u16 omtu; | |
76 | __u16 imtu; | |
77 | __u16 flush_to; | |
78 | __u8 mode; | |
79 | __u8 fcs; | |
80 | __u8 max_tx; | |
81 | __u16 txwin_size; | |
82 | }; | |
83 | ||
84 | #define L2CAP_CONNINFO 0x02 | |
85 | struct l2cap_conninfo { | |
86 | __u16 hci_handle; | |
87 | __u8 dev_class[3]; | |
88 | }; | |
89 | ||
90 | #define L2CAP_LM 0x03 | |
91 | #define L2CAP_LM_MASTER 0x0001 | |
92 | #define L2CAP_LM_AUTH 0x0002 | |
93 | #define L2CAP_LM_ENCRYPT 0x0004 | |
94 | #define L2CAP_LM_TRUSTED 0x0008 | |
95 | #define L2CAP_LM_RELIABLE 0x0010 | |
96 | #define L2CAP_LM_SECURE 0x0020 | |
97 | #define L2CAP_LM_FIPS 0x0040 | |
98 | ||
99 | /* L2CAP command codes */ | |
100 | #define L2CAP_COMMAND_REJ 0x01 | |
101 | #define L2CAP_CONN_REQ 0x02 | |
102 | #define L2CAP_CONN_RSP 0x03 | |
103 | #define L2CAP_CONF_REQ 0x04 | |
104 | #define L2CAP_CONF_RSP 0x05 | |
105 | #define L2CAP_DISCONN_REQ 0x06 | |
106 | #define L2CAP_DISCONN_RSP 0x07 | |
107 | #define L2CAP_ECHO_REQ 0x08 | |
108 | #define L2CAP_ECHO_RSP 0x09 | |
109 | #define L2CAP_INFO_REQ 0x0a | |
110 | #define L2CAP_INFO_RSP 0x0b | |
111 | #define L2CAP_CREATE_CHAN_REQ 0x0c | |
112 | #define L2CAP_CREATE_CHAN_RSP 0x0d | |
113 | #define L2CAP_MOVE_CHAN_REQ 0x0e | |
114 | #define L2CAP_MOVE_CHAN_RSP 0x0f | |
115 | #define L2CAP_MOVE_CHAN_CFM 0x10 | |
116 | #define L2CAP_MOVE_CHAN_CFM_RSP 0x11 | |
117 | #define L2CAP_CONN_PARAM_UPDATE_REQ 0x12 | |
118 | #define L2CAP_CONN_PARAM_UPDATE_RSP 0x13 | |
119 | #define L2CAP_LE_CONN_REQ 0x14 | |
120 | #define L2CAP_LE_CONN_RSP 0x15 | |
121 | #define L2CAP_LE_CREDITS 0x16 | |
122 | ||
123 | /* L2CAP extended feature mask */ | |
124 | #define L2CAP_FEAT_FLOWCTL 0x00000001 | |
125 | #define L2CAP_FEAT_RETRANS 0x00000002 | |
126 | #define L2CAP_FEAT_BIDIR_QOS 0x00000004 | |
127 | #define L2CAP_FEAT_ERTM 0x00000008 | |
128 | #define L2CAP_FEAT_STREAMING 0x00000010 | |
129 | #define L2CAP_FEAT_FCS 0x00000020 | |
130 | #define L2CAP_FEAT_EXT_FLOW 0x00000040 | |
131 | #define L2CAP_FEAT_FIXED_CHAN 0x00000080 | |
132 | #define L2CAP_FEAT_EXT_WINDOW 0x00000100 | |
133 | #define L2CAP_FEAT_UCD 0x00000200 | |
134 | ||
135 | /* L2CAP checksum option */ | |
136 | #define L2CAP_FCS_NONE 0x00 | |
137 | #define L2CAP_FCS_CRC16 0x01 | |
138 | ||
139 | /* L2CAP fixed channels */ | |
140 | #define L2CAP_FC_SIG_BREDR 0x02 | |
141 | #define L2CAP_FC_CONNLESS 0x04 | |
142 | #define L2CAP_FC_A2MP 0x08 | |
143 | #define L2CAP_FC_ATT 0x10 | |
144 | #define L2CAP_FC_SIG_LE 0x20 | |
145 | #define L2CAP_FC_SMP_LE 0x40 | |
146 | #define L2CAP_FC_SMP_BREDR 0x80 | |
147 | ||
148 | /* L2CAP Control Field bit masks */ | |
149 | #define L2CAP_CTRL_SAR 0xC000 | |
150 | #define L2CAP_CTRL_REQSEQ 0x3F00 | |
151 | #define L2CAP_CTRL_TXSEQ 0x007E | |
152 | #define L2CAP_CTRL_SUPERVISE 0x000C | |
153 | ||
154 | #define L2CAP_CTRL_RETRANS 0x0080 | |
155 | #define L2CAP_CTRL_FINAL 0x0080 | |
156 | #define L2CAP_CTRL_POLL 0x0010 | |
157 | #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ | |
158 | ||
159 | #define L2CAP_CTRL_TXSEQ_SHIFT 1 | |
160 | #define L2CAP_CTRL_SUPER_SHIFT 2 | |
161 | #define L2CAP_CTRL_POLL_SHIFT 4 | |
162 | #define L2CAP_CTRL_FINAL_SHIFT 7 | |
163 | #define L2CAP_CTRL_REQSEQ_SHIFT 8 | |
164 | #define L2CAP_CTRL_SAR_SHIFT 14 | |
165 | ||
166 | /* L2CAP Extended Control Field bit mask */ | |
167 | #define L2CAP_EXT_CTRL_TXSEQ 0xFFFC0000 | |
168 | #define L2CAP_EXT_CTRL_SAR 0x00030000 | |
169 | #define L2CAP_EXT_CTRL_SUPERVISE 0x00030000 | |
170 | #define L2CAP_EXT_CTRL_REQSEQ 0x0000FFFC | |
171 | ||
172 | #define L2CAP_EXT_CTRL_POLL 0x00040000 | |
173 | #define L2CAP_EXT_CTRL_FINAL 0x00000002 | |
174 | #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ | |
175 | ||
176 | #define L2CAP_EXT_CTRL_FINAL_SHIFT 1 | |
177 | #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 | |
178 | #define L2CAP_EXT_CTRL_SAR_SHIFT 16 | |
179 | #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 | |
180 | #define L2CAP_EXT_CTRL_POLL_SHIFT 18 | |
181 | #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 | |
182 | ||
183 | /* L2CAP Supervisory Function */ | |
184 | #define L2CAP_SUPER_RR 0x00 | |
185 | #define L2CAP_SUPER_REJ 0x01 | |
186 | #define L2CAP_SUPER_RNR 0x02 | |
187 | #define L2CAP_SUPER_SREJ 0x03 | |
188 | ||
189 | /* L2CAP Segmentation and Reassembly */ | |
190 | #define L2CAP_SAR_UNSEGMENTED 0x00 | |
191 | #define L2CAP_SAR_START 0x01 | |
192 | #define L2CAP_SAR_END 0x02 | |
193 | #define L2CAP_SAR_CONTINUE 0x03 | |
194 | ||
195 | /* L2CAP Command rej. reasons */ | |
196 | #define L2CAP_REJ_NOT_UNDERSTOOD 0x0000 | |
197 | #define L2CAP_REJ_MTU_EXCEEDED 0x0001 | |
198 | #define L2CAP_REJ_INVALID_CID 0x0002 | |
199 | ||
200 | /* L2CAP structures */ | |
201 | struct l2cap_hdr { | |
202 | __le16 len; | |
203 | __le16 cid; | |
204 | } __packed; | |
205 | #define L2CAP_HDR_SIZE 4 | |
206 | #define L2CAP_ENH_HDR_SIZE 6 | |
207 | #define L2CAP_EXT_HDR_SIZE 8 | |
208 | ||
209 | #define L2CAP_FCS_SIZE 2 | |
210 | #define L2CAP_SDULEN_SIZE 2 | |
211 | #define L2CAP_PSMLEN_SIZE 2 | |
212 | #define L2CAP_ENH_CTRL_SIZE 2 | |
213 | #define L2CAP_EXT_CTRL_SIZE 4 | |
214 | ||
215 | struct l2cap_cmd_hdr { | |
216 | __u8 code; | |
217 | __u8 ident; | |
218 | __le16 len; | |
219 | } __packed; | |
220 | #define L2CAP_CMD_HDR_SIZE 4 | |
221 | ||
222 | struct l2cap_cmd_rej_unk { | |
223 | __le16 reason; | |
224 | } __packed; | |
225 | ||
226 | struct l2cap_cmd_rej_mtu { | |
227 | __le16 reason; | |
228 | __le16 max_mtu; | |
229 | } __packed; | |
230 | ||
231 | struct l2cap_cmd_rej_cid { | |
232 | __le16 reason; | |
233 | __le16 scid; | |
234 | __le16 dcid; | |
235 | } __packed; | |
236 | ||
237 | struct l2cap_conn_req { | |
238 | __le16 psm; | |
239 | __le16 scid; | |
240 | } __packed; | |
241 | ||
242 | struct l2cap_conn_rsp { | |
243 | __le16 dcid; | |
244 | __le16 scid; | |
245 | __le16 result; | |
246 | __le16 status; | |
247 | } __packed; | |
248 | ||
249 | /* protocol/service multiplexer (PSM) */ | |
250 | #define L2CAP_PSM_SDP 0x0001 | |
251 | #define L2CAP_PSM_RFCOMM 0x0003 | |
252 | #define L2CAP_PSM_3DSP 0x0021 | |
253 | #define L2CAP_PSM_IPSP 0x0023 /* 6LoWPAN */ | |
254 | ||
255 | #define L2CAP_PSM_DYN_START 0x1001 | |
256 | #define L2CAP_PSM_DYN_END 0xffff | |
257 | #define L2CAP_PSM_AUTO_END 0x10ff | |
258 | #define L2CAP_PSM_LE_DYN_START 0x0080 | |
259 | #define L2CAP_PSM_LE_DYN_END 0x00ff | |
260 | ||
261 | /* channel identifier */ | |
262 | #define L2CAP_CID_SIGNALING 0x0001 | |
263 | #define L2CAP_CID_CONN_LESS 0x0002 | |
264 | #define L2CAP_CID_A2MP 0x0003 | |
265 | #define L2CAP_CID_ATT 0x0004 | |
266 | #define L2CAP_CID_LE_SIGNALING 0x0005 | |
267 | #define L2CAP_CID_SMP 0x0006 | |
268 | #define L2CAP_CID_SMP_BREDR 0x0007 | |
269 | #define L2CAP_CID_DYN_START 0x0040 | |
270 | #define L2CAP_CID_DYN_END 0xffff | |
271 | #define L2CAP_CID_LE_DYN_END 0x007f | |
272 | ||
273 | /* connect/create channel results */ | |
274 | #define L2CAP_CR_SUCCESS 0x0000 | |
275 | #define L2CAP_CR_PEND 0x0001 | |
276 | #define L2CAP_CR_BAD_PSM 0x0002 | |
277 | #define L2CAP_CR_SEC_BLOCK 0x0003 | |
278 | #define L2CAP_CR_NO_MEM 0x0004 | |
279 | #define L2CAP_CR_BAD_AMP 0x0005 | |
280 | #define L2CAP_CR_AUTHENTICATION 0x0005 | |
281 | #define L2CAP_CR_AUTHORIZATION 0x0006 | |
282 | #define L2CAP_CR_BAD_KEY_SIZE 0x0007 | |
283 | #define L2CAP_CR_ENCRYPTION 0x0008 | |
284 | #define L2CAP_CR_INVALID_SCID 0x0009 | |
285 | #define L2CAP_CR_SCID_IN_USE 0x000A | |
286 | ||
287 | /* connect/create channel status */ | |
288 | #define L2CAP_CS_NO_INFO 0x0000 | |
289 | #define L2CAP_CS_AUTHEN_PEND 0x0001 | |
290 | #define L2CAP_CS_AUTHOR_PEND 0x0002 | |
291 | ||
292 | struct l2cap_conf_req { | |
293 | __le16 dcid; | |
294 | __le16 flags; | |
295 | __u8 data[0]; | |
296 | } __packed; | |
297 | ||
298 | struct l2cap_conf_rsp { | |
299 | __le16 scid; | |
300 | __le16 flags; | |
301 | __le16 result; | |
302 | __u8 data[0]; | |
303 | } __packed; | |
304 | ||
305 | #define L2CAP_CONF_SUCCESS 0x0000 | |
306 | #define L2CAP_CONF_UNACCEPT 0x0001 | |
307 | #define L2CAP_CONF_REJECT 0x0002 | |
308 | #define L2CAP_CONF_UNKNOWN 0x0003 | |
309 | #define L2CAP_CONF_PENDING 0x0004 | |
310 | #define L2CAP_CONF_EFS_REJECT 0x0005 | |
311 | ||
312 | /* configuration req/rsp continuation flag */ | |
313 | #define L2CAP_CONF_FLAG_CONTINUATION 0x0001 | |
314 | ||
315 | struct l2cap_conf_opt { | |
316 | __u8 type; | |
317 | __u8 len; | |
318 | __u8 val[0]; | |
319 | } __packed; | |
320 | #define L2CAP_CONF_OPT_SIZE 2 | |
321 | ||
322 | #define L2CAP_CONF_HINT 0x80 | |
323 | #define L2CAP_CONF_MASK 0x7f | |
324 | ||
325 | #define L2CAP_CONF_MTU 0x01 | |
326 | #define L2CAP_CONF_FLUSH_TO 0x02 | |
327 | #define L2CAP_CONF_QOS 0x03 | |
328 | #define L2CAP_CONF_RFC 0x04 | |
329 | #define L2CAP_CONF_FCS 0x05 | |
330 | #define L2CAP_CONF_EFS 0x06 | |
331 | #define L2CAP_CONF_EWS 0x07 | |
332 | ||
333 | #define L2CAP_CONF_MAX_SIZE 22 | |
334 | ||
335 | struct l2cap_conf_rfc { | |
336 | __u8 mode; | |
337 | __u8 txwin_size; | |
338 | __u8 max_transmit; | |
339 | __le16 retrans_timeout; | |
340 | __le16 monitor_timeout; | |
341 | __le16 max_pdu_size; | |
342 | } __packed; | |
343 | ||
344 | #define L2CAP_MODE_BASIC 0x00 | |
345 | #define L2CAP_MODE_RETRANS 0x01 | |
346 | #define L2CAP_MODE_FLOWCTL 0x02 | |
347 | #define L2CAP_MODE_ERTM 0x03 | |
348 | #define L2CAP_MODE_STREAMING 0x04 | |
349 | ||
350 | /* Unlike the above this one doesn't actually map to anything that would | |
351 | * ever be sent over the air. Therefore, use a value that's unlikely to | |
352 | * ever be used in the BR/EDR configuration phase. | |
353 | */ | |
354 | #define L2CAP_MODE_LE_FLOWCTL 0x80 | |
355 | ||
356 | struct l2cap_conf_efs { | |
357 | __u8 id; | |
358 | __u8 stype; | |
359 | __le16 msdu; | |
360 | __le32 sdu_itime; | |
361 | __le32 acc_lat; | |
362 | __le32 flush_to; | |
363 | } __packed; | |
364 | ||
365 | #define L2CAP_SERV_NOTRAFIC 0x00 | |
366 | #define L2CAP_SERV_BESTEFFORT 0x01 | |
367 | #define L2CAP_SERV_GUARANTEED 0x02 | |
368 | ||
369 | #define L2CAP_BESTEFFORT_ID 0x01 | |
370 | ||
371 | struct l2cap_disconn_req { | |
372 | __le16 dcid; | |
373 | __le16 scid; | |
374 | } __packed; | |
375 | ||
376 | struct l2cap_disconn_rsp { | |
377 | __le16 dcid; | |
378 | __le16 scid; | |
379 | } __packed; | |
380 | ||
381 | struct l2cap_info_req { | |
382 | __le16 type; | |
383 | } __packed; | |
384 | ||
385 | struct l2cap_info_rsp { | |
386 | __le16 type; | |
387 | __le16 result; | |
388 | __u8 data[0]; | |
389 | } __packed; | |
390 | ||
391 | struct l2cap_create_chan_req { | |
392 | __le16 psm; | |
393 | __le16 scid; | |
394 | __u8 amp_id; | |
395 | } __packed; | |
396 | ||
397 | struct l2cap_create_chan_rsp { | |
398 | __le16 dcid; | |
399 | __le16 scid; | |
400 | __le16 result; | |
401 | __le16 status; | |
402 | } __packed; | |
403 | ||
404 | struct l2cap_move_chan_req { | |
405 | __le16 icid; | |
406 | __u8 dest_amp_id; | |
407 | } __packed; | |
408 | ||
409 | struct l2cap_move_chan_rsp { | |
410 | __le16 icid; | |
411 | __le16 result; | |
412 | } __packed; | |
413 | ||
414 | #define L2CAP_MR_SUCCESS 0x0000 | |
415 | #define L2CAP_MR_PEND 0x0001 | |
416 | #define L2CAP_MR_BAD_ID 0x0002 | |
417 | #define L2CAP_MR_SAME_ID 0x0003 | |
418 | #define L2CAP_MR_NOT_SUPP 0x0004 | |
419 | #define L2CAP_MR_COLLISION 0x0005 | |
420 | #define L2CAP_MR_NOT_ALLOWED 0x0006 | |
421 | ||
422 | struct l2cap_move_chan_cfm { | |
423 | __le16 icid; | |
424 | __le16 result; | |
425 | } __packed; | |
426 | ||
427 | #define L2CAP_MC_CONFIRMED 0x0000 | |
428 | #define L2CAP_MC_UNCONFIRMED 0x0001 | |
429 | ||
430 | struct l2cap_move_chan_cfm_rsp { | |
431 | __le16 icid; | |
432 | } __packed; | |
433 | ||
434 | /* info type */ | |
435 | #define L2CAP_IT_CL_MTU 0x0001 | |
436 | #define L2CAP_IT_FEAT_MASK 0x0002 | |
437 | #define L2CAP_IT_FIXED_CHAN 0x0003 | |
438 | ||
439 | /* info result */ | |
440 | #define L2CAP_IR_SUCCESS 0x0000 | |
441 | #define L2CAP_IR_NOTSUPP 0x0001 | |
442 | ||
443 | struct l2cap_conn_param_update_req { | |
444 | __le16 min; | |
445 | __le16 max; | |
446 | __le16 latency; | |
447 | __le16 to_multiplier; | |
448 | } __packed; | |
449 | ||
450 | struct l2cap_conn_param_update_rsp { | |
451 | __le16 result; | |
452 | } __packed; | |
453 | ||
454 | /* Connection Parameters result */ | |
455 | #define L2CAP_CONN_PARAM_ACCEPTED 0x0000 | |
456 | #define L2CAP_CONN_PARAM_REJECTED 0x0001 | |
457 | ||
458 | #define L2CAP_LE_MAX_CREDITS 10 | |
459 | #define L2CAP_LE_DEFAULT_MPS 230 | |
460 | ||
461 | struct l2cap_le_conn_req { | |
462 | __le16 psm; | |
463 | __le16 scid; | |
464 | __le16 mtu; | |
465 | __le16 mps; | |
466 | __le16 credits; | |
467 | } __packed; | |
468 | ||
469 | struct l2cap_le_conn_rsp { | |
470 | __le16 dcid; | |
471 | __le16 mtu; | |
472 | __le16 mps; | |
473 | __le16 credits; | |
474 | __le16 result; | |
475 | } __packed; | |
476 | ||
477 | struct l2cap_le_credits { | |
478 | __le16 cid; | |
479 | __le16 credits; | |
480 | } __packed; | |
481 | ||
482 | /* ----- L2CAP channels and connections ----- */ | |
483 | struct l2cap_seq_list { | |
484 | __u16 head; | |
485 | __u16 tail; | |
486 | __u16 mask; | |
487 | __u16 *list; | |
488 | }; | |
489 | ||
490 | #define L2CAP_SEQ_LIST_CLEAR 0xFFFF | |
491 | #define L2CAP_SEQ_LIST_TAIL 0x8000 | |
492 | ||
493 | struct l2cap_chan { | |
494 | struct l2cap_conn *conn; | |
495 | struct hci_conn *hs_hcon; | |
496 | struct hci_chan *hs_hchan; | |
497 | struct kref kref; | |
498 | atomic_t nesting; | |
499 | ||
500 | __u8 state; | |
501 | ||
502 | bdaddr_t dst; | |
503 | __u8 dst_type; | |
504 | bdaddr_t src; | |
505 | __u8 src_type; | |
506 | __le16 psm; | |
507 | __le16 sport; | |
508 | __u16 dcid; | |
509 | __u16 scid; | |
510 | ||
511 | __u16 imtu; | |
512 | __u16 omtu; | |
513 | __u16 flush_to; | |
514 | __u8 mode; | |
515 | __u8 chan_type; | |
516 | __u8 chan_policy; | |
517 | ||
518 | __u8 sec_level; | |
519 | ||
520 | __u8 ident; | |
521 | ||
522 | __u8 conf_req[64]; | |
523 | __u8 conf_len; | |
524 | __u8 num_conf_req; | |
525 | __u8 num_conf_rsp; | |
526 | ||
527 | __u8 fcs; | |
528 | ||
529 | __u16 tx_win; | |
530 | __u16 tx_win_max; | |
531 | __u16 ack_win; | |
532 | __u8 max_tx; | |
533 | __u16 retrans_timeout; | |
534 | __u16 monitor_timeout; | |
535 | __u16 mps; | |
536 | ||
537 | __u16 tx_credits; | |
538 | __u16 rx_credits; | |
539 | ||
540 | __u8 tx_state; | |
541 | __u8 rx_state; | |
542 | ||
543 | unsigned long conf_state; | |
544 | unsigned long conn_state; | |
545 | unsigned long flags; | |
546 | ||
547 | __u8 remote_amp_id; | |
548 | __u8 local_amp_id; | |
549 | __u8 move_id; | |
550 | __u8 move_state; | |
551 | __u8 move_role; | |
552 | ||
553 | __u16 next_tx_seq; | |
554 | __u16 expected_ack_seq; | |
555 | __u16 expected_tx_seq; | |
556 | __u16 buffer_seq; | |
557 | __u16 srej_save_reqseq; | |
558 | __u16 last_acked_seq; | |
559 | __u16 frames_sent; | |
560 | __u16 unacked_frames; | |
561 | __u8 retry_count; | |
562 | __u16 sdu_len; | |
563 | struct sk_buff *sdu; | |
564 | struct sk_buff *sdu_last_frag; | |
565 | ||
566 | __u16 remote_tx_win; | |
567 | __u8 remote_max_tx; | |
568 | __u16 remote_mps; | |
569 | ||
570 | __u8 local_id; | |
571 | __u8 local_stype; | |
572 | __u16 local_msdu; | |
573 | __u32 local_sdu_itime; | |
574 | __u32 local_acc_lat; | |
575 | __u32 local_flush_to; | |
576 | ||
577 | __u8 remote_id; | |
578 | __u8 remote_stype; | |
579 | __u16 remote_msdu; | |
580 | __u32 remote_sdu_itime; | |
581 | __u32 remote_acc_lat; | |
582 | __u32 remote_flush_to; | |
583 | ||
584 | struct delayed_work chan_timer; | |
585 | struct delayed_work retrans_timer; | |
586 | struct delayed_work monitor_timer; | |
587 | struct delayed_work ack_timer; | |
588 | ||
589 | struct sk_buff *tx_send_head; | |
590 | struct sk_buff_head tx_q; | |
591 | struct sk_buff_head srej_q; | |
592 | struct l2cap_seq_list srej_list; | |
593 | struct l2cap_seq_list retrans_list; | |
594 | ||
595 | struct list_head list; | |
596 | struct list_head global_l; | |
597 | ||
598 | void *data; | |
599 | const struct l2cap_ops *ops; | |
600 | struct mutex lock; | |
601 | }; | |
602 | ||
603 | struct l2cap_ops { | |
604 | char *name; | |
605 | ||
606 | struct l2cap_chan *(*new_connection) (struct l2cap_chan *chan); | |
607 | int (*recv) (struct l2cap_chan * chan, | |
608 | struct sk_buff *skb); | |
609 | void (*teardown) (struct l2cap_chan *chan, int err); | |
610 | void (*close) (struct l2cap_chan *chan); | |
611 | void (*state_change) (struct l2cap_chan *chan, | |
612 | int state, int err); | |
613 | void (*ready) (struct l2cap_chan *chan); | |
614 | void (*defer) (struct l2cap_chan *chan); | |
615 | void (*resume) (struct l2cap_chan *chan); | |
616 | void (*suspend) (struct l2cap_chan *chan); | |
617 | void (*set_shutdown) (struct l2cap_chan *chan); | |
618 | long (*get_sndtimeo) (struct l2cap_chan *chan); | |
619 | struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan, | |
620 | unsigned long hdr_len, | |
621 | unsigned long len, int nb); | |
622 | }; | |
623 | ||
624 | struct l2cap_conn { | |
625 | struct hci_conn *hcon; | |
626 | struct hci_chan *hchan; | |
627 | ||
628 | unsigned int mtu; | |
629 | ||
630 | __u32 feat_mask; | |
631 | __u8 remote_fixed_chan; | |
632 | __u8 local_fixed_chan; | |
633 | ||
634 | __u8 info_state; | |
635 | __u8 info_ident; | |
636 | ||
637 | struct delayed_work info_timer; | |
638 | ||
639 | struct sk_buff *rx_skb; | |
640 | __u32 rx_len; | |
641 | __u8 tx_ident; | |
642 | struct mutex ident_lock; | |
643 | ||
644 | struct sk_buff_head pending_rx; | |
645 | struct work_struct pending_rx_work; | |
646 | ||
647 | struct work_struct id_addr_update_work; | |
648 | ||
649 | __u8 disc_reason; | |
650 | ||
651 | struct l2cap_chan *smp; | |
652 | ||
653 | struct list_head chan_l; | |
654 | struct mutex chan_lock; | |
655 | struct kref ref; | |
656 | struct list_head users; | |
657 | }; | |
658 | ||
659 | struct l2cap_user { | |
660 | struct list_head list; | |
661 | int (*probe) (struct l2cap_conn *conn, struct l2cap_user *user); | |
662 | void (*remove) (struct l2cap_conn *conn, struct l2cap_user *user); | |
663 | }; | |
664 | ||
665 | #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 | |
666 | #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 | |
667 | #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 | |
668 | ||
669 | #define L2CAP_CHAN_RAW 1 | |
670 | #define L2CAP_CHAN_CONN_LESS 2 | |
671 | #define L2CAP_CHAN_CONN_ORIENTED 3 | |
672 | #define L2CAP_CHAN_FIXED 4 | |
673 | ||
674 | /* ----- L2CAP socket info ----- */ | |
675 | #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) | |
676 | ||
677 | struct l2cap_pinfo { | |
678 | struct bt_sock bt; | |
679 | struct l2cap_chan *chan; | |
680 | struct sk_buff *rx_busy_skb; | |
681 | }; | |
682 | ||
683 | enum { | |
684 | CONF_REQ_SENT, | |
685 | CONF_INPUT_DONE, | |
686 | CONF_OUTPUT_DONE, | |
687 | CONF_MTU_DONE, | |
688 | CONF_MODE_DONE, | |
689 | CONF_CONNECT_PEND, | |
690 | CONF_RECV_NO_FCS, | |
691 | CONF_STATE2_DEVICE, | |
692 | CONF_EWS_RECV, | |
693 | CONF_LOC_CONF_PEND, | |
694 | CONF_REM_CONF_PEND, | |
695 | CONF_NOT_COMPLETE, | |
696 | }; | |
697 | ||
698 | #define L2CAP_CONF_MAX_CONF_REQ 2 | |
699 | #define L2CAP_CONF_MAX_CONF_RSP 2 | |
700 | ||
701 | enum { | |
702 | CONN_SREJ_SENT, | |
703 | CONN_WAIT_F, | |
704 | CONN_SREJ_ACT, | |
705 | CONN_SEND_PBIT, | |
706 | CONN_REMOTE_BUSY, | |
707 | CONN_LOCAL_BUSY, | |
708 | CONN_REJ_ACT, | |
709 | CONN_SEND_FBIT, | |
710 | CONN_RNR_SENT, | |
711 | }; | |
712 | ||
713 | /* Definitions for flags in l2cap_chan */ | |
714 | enum { | |
715 | FLAG_ROLE_SWITCH, | |
716 | FLAG_FORCE_ACTIVE, | |
717 | FLAG_FORCE_RELIABLE, | |
718 | FLAG_FLUSHABLE, | |
719 | FLAG_EXT_CTRL, | |
720 | FLAG_EFS_ENABLE, | |
721 | FLAG_DEFER_SETUP, | |
722 | FLAG_LE_CONN_REQ_SENT, | |
723 | FLAG_PENDING_SECURITY, | |
724 | FLAG_HOLD_HCI_CONN, | |
725 | }; | |
726 | ||
727 | /* Lock nesting levels for L2CAP channels. We need these because lockdep | |
728 | * otherwise considers all channels equal and will e.g. complain about a | |
729 | * connection oriented channel triggering SMP procedures or a listening | |
730 | * channel creating and locking a child channel. | |
731 | */ | |
732 | enum { | |
733 | L2CAP_NESTING_SMP, | |
734 | L2CAP_NESTING_NORMAL, | |
735 | L2CAP_NESTING_PARENT, | |
736 | }; | |
737 | ||
738 | enum { | |
739 | L2CAP_TX_STATE_XMIT, | |
740 | L2CAP_TX_STATE_WAIT_F, | |
741 | }; | |
742 | ||
743 | enum { | |
744 | L2CAP_RX_STATE_RECV, | |
745 | L2CAP_RX_STATE_SREJ_SENT, | |
746 | L2CAP_RX_STATE_MOVE, | |
747 | L2CAP_RX_STATE_WAIT_P, | |
748 | L2CAP_RX_STATE_WAIT_F, | |
749 | }; | |
750 | ||
751 | enum { | |
752 | L2CAP_TXSEQ_EXPECTED, | |
753 | L2CAP_TXSEQ_EXPECTED_SREJ, | |
754 | L2CAP_TXSEQ_UNEXPECTED, | |
755 | L2CAP_TXSEQ_UNEXPECTED_SREJ, | |
756 | L2CAP_TXSEQ_DUPLICATE, | |
757 | L2CAP_TXSEQ_DUPLICATE_SREJ, | |
758 | L2CAP_TXSEQ_INVALID, | |
759 | L2CAP_TXSEQ_INVALID_IGNORE, | |
760 | }; | |
761 | ||
762 | enum { | |
763 | L2CAP_EV_DATA_REQUEST, | |
764 | L2CAP_EV_LOCAL_BUSY_DETECTED, | |
765 | L2CAP_EV_LOCAL_BUSY_CLEAR, | |
766 | L2CAP_EV_RECV_REQSEQ_AND_FBIT, | |
767 | L2CAP_EV_RECV_FBIT, | |
768 | L2CAP_EV_RETRANS_TO, | |
769 | L2CAP_EV_MONITOR_TO, | |
770 | L2CAP_EV_EXPLICIT_POLL, | |
771 | L2CAP_EV_RECV_IFRAME, | |
772 | L2CAP_EV_RECV_RR, | |
773 | L2CAP_EV_RECV_REJ, | |
774 | L2CAP_EV_RECV_RNR, | |
775 | L2CAP_EV_RECV_SREJ, | |
776 | L2CAP_EV_RECV_FRAME, | |
777 | }; | |
778 | ||
779 | enum { | |
780 | L2CAP_MOVE_ROLE_NONE, | |
781 | L2CAP_MOVE_ROLE_INITIATOR, | |
782 | L2CAP_MOVE_ROLE_RESPONDER, | |
783 | }; | |
784 | ||
785 | enum { | |
786 | L2CAP_MOVE_STABLE, | |
787 | L2CAP_MOVE_WAIT_REQ, | |
788 | L2CAP_MOVE_WAIT_RSP, | |
789 | L2CAP_MOVE_WAIT_RSP_SUCCESS, | |
790 | L2CAP_MOVE_WAIT_CONFIRM, | |
791 | L2CAP_MOVE_WAIT_CONFIRM_RSP, | |
792 | L2CAP_MOVE_WAIT_LOGICAL_COMP, | |
793 | L2CAP_MOVE_WAIT_LOGICAL_CFM, | |
794 | L2CAP_MOVE_WAIT_LOCAL_BUSY, | |
795 | L2CAP_MOVE_WAIT_PREPARE, | |
796 | }; | |
797 | ||
798 | void l2cap_chan_hold(struct l2cap_chan *c); | |
799 | void l2cap_chan_put(struct l2cap_chan *c); | |
800 | ||
801 | static inline void l2cap_chan_lock(struct l2cap_chan *chan) | |
802 | { | |
803 | mutex_lock_nested(&chan->lock, atomic_read(&chan->nesting)); | |
804 | } | |
805 | ||
806 | static inline void l2cap_chan_unlock(struct l2cap_chan *chan) | |
807 | { | |
808 | mutex_unlock(&chan->lock); | |
809 | } | |
810 | ||
811 | static inline void l2cap_set_timer(struct l2cap_chan *chan, | |
812 | struct delayed_work *work, long timeout) | |
813 | { | |
814 | BT_DBG("chan %p state %s timeout %ld", chan, | |
815 | state_to_string(chan->state), timeout); | |
816 | ||
817 | /* If delayed work cancelled do not hold(chan) | |
818 | since it is already done with previous set_timer */ | |
819 | if (!cancel_delayed_work(work)) | |
820 | l2cap_chan_hold(chan); | |
821 | ||
822 | schedule_delayed_work(work, timeout); | |
823 | } | |
824 | ||
825 | static inline bool l2cap_clear_timer(struct l2cap_chan *chan, | |
826 | struct delayed_work *work) | |
827 | { | |
828 | bool ret; | |
829 | ||
830 | /* put(chan) if delayed work cancelled otherwise it | |
831 | is done in delayed work function */ | |
832 | ret = cancel_delayed_work(work); | |
833 | if (ret) | |
834 | l2cap_chan_put(chan); | |
835 | ||
836 | return ret; | |
837 | } | |
838 | ||
839 | #define __set_chan_timer(c, t) l2cap_set_timer(c, &c->chan_timer, (t)) | |
840 | #define __clear_chan_timer(c) l2cap_clear_timer(c, &c->chan_timer) | |
841 | #define __clear_retrans_timer(c) l2cap_clear_timer(c, &c->retrans_timer) | |
842 | #define __clear_monitor_timer(c) l2cap_clear_timer(c, &c->monitor_timer) | |
843 | #define __set_ack_timer(c) l2cap_set_timer(c, &chan->ack_timer, \ | |
844 | msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); | |
845 | #define __clear_ack_timer(c) l2cap_clear_timer(c, &c->ack_timer) | |
846 | ||
847 | static inline int __seq_offset(struct l2cap_chan *chan, __u16 seq1, __u16 seq2) | |
848 | { | |
849 | if (seq1 >= seq2) | |
850 | return seq1 - seq2; | |
851 | else | |
852 | return chan->tx_win_max + 1 - seq2 + seq1; | |
853 | } | |
854 | ||
855 | static inline __u16 __next_seq(struct l2cap_chan *chan, __u16 seq) | |
856 | { | |
857 | return (seq + 1) % (chan->tx_win_max + 1); | |
858 | } | |
859 | ||
860 | static inline struct l2cap_chan *l2cap_chan_no_new_connection(struct l2cap_chan *chan) | |
861 | { | |
862 | return NULL; | |
863 | } | |
864 | ||
865 | static inline int l2cap_chan_no_recv(struct l2cap_chan *chan, struct sk_buff *skb) | |
866 | { | |
867 | return -ENOSYS; | |
868 | } | |
869 | ||
870 | static inline struct sk_buff *l2cap_chan_no_alloc_skb(struct l2cap_chan *chan, | |
871 | unsigned long hdr_len, | |
872 | unsigned long len, int nb) | |
873 | { | |
874 | return ERR_PTR(-ENOSYS); | |
875 | } | |
876 | ||
877 | static inline void l2cap_chan_no_teardown(struct l2cap_chan *chan, int err) | |
878 | { | |
879 | } | |
880 | ||
881 | static inline void l2cap_chan_no_close(struct l2cap_chan *chan) | |
882 | { | |
883 | } | |
884 | ||
885 | static inline void l2cap_chan_no_ready(struct l2cap_chan *chan) | |
886 | { | |
887 | } | |
888 | ||
889 | static inline void l2cap_chan_no_state_change(struct l2cap_chan *chan, | |
890 | int state, int err) | |
891 | { | |
892 | } | |
893 | ||
894 | static inline void l2cap_chan_no_defer(struct l2cap_chan *chan) | |
895 | { | |
896 | } | |
897 | ||
898 | static inline void l2cap_chan_no_suspend(struct l2cap_chan *chan) | |
899 | { | |
900 | } | |
901 | ||
902 | static inline void l2cap_chan_no_resume(struct l2cap_chan *chan) | |
903 | { | |
904 | } | |
905 | ||
906 | static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan) | |
907 | { | |
908 | } | |
909 | ||
910 | static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan) | |
911 | { | |
912 | return 0; | |
913 | } | |
914 | ||
915 | extern bool disable_ertm; | |
916 | ||
917 | int l2cap_init_sockets(void); | |
918 | void l2cap_cleanup_sockets(void); | |
919 | bool l2cap_is_socket(struct socket *sock); | |
920 | ||
921 | void __l2cap_le_connect_rsp_defer(struct l2cap_chan *chan); | |
922 | void __l2cap_connect_rsp_defer(struct l2cap_chan *chan); | |
923 | ||
924 | int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); | |
925 | int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); | |
926 | ||
927 | struct l2cap_chan *l2cap_chan_create(void); | |
928 | void l2cap_chan_close(struct l2cap_chan *chan, int reason); | |
929 | int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, | |
930 | bdaddr_t *dst, u8 dst_type); | |
931 | int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len); | |
932 | void l2cap_chan_busy(struct l2cap_chan *chan, int busy); | |
933 | int l2cap_chan_check_security(struct l2cap_chan *chan, bool initiator); | |
934 | void l2cap_chan_set_defaults(struct l2cap_chan *chan); | |
935 | int l2cap_ertm_init(struct l2cap_chan *chan); | |
936 | void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); | |
937 | void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan); | |
938 | void l2cap_chan_del(struct l2cap_chan *chan, int err); | |
939 | void l2cap_send_conn_req(struct l2cap_chan *chan); | |
940 | void l2cap_move_start(struct l2cap_chan *chan); | |
941 | void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, | |
942 | u8 status); | |
943 | void __l2cap_physical_cfm(struct l2cap_chan *chan, int result); | |
944 | ||
945 | struct l2cap_conn *l2cap_conn_get(struct l2cap_conn *conn); | |
946 | void l2cap_conn_put(struct l2cap_conn *conn); | |
947 | ||
948 | int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user); | |
949 | void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user); | |
950 | ||
951 | #endif /* __L2CAP_H */ |