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Linux 3.11-rc3
[cris-mirror.git] / net / bluetooth / cmtp / capi.c
blobcd75e4d64b9093df7f3d07c711b43ba983779197
1 /*
2 CMTP implementation for Linux Bluetooth stack (BlueZ).
3 Copyright (C) 2002-2003 Marcel Holtmann <marcel@holtmann.org>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License version 2 as
7 published by the Free Software Foundation;
8
9 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
10 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
11 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
12 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
13 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17
18 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
19 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
20 SOFTWARE IS DISCLAIMED.
21 */
22
23 #include <linux/export.h>
24 #include <linux/proc_fs.h>
25 #include <linux/seq_file.h>
26 #include <linux/types.h>
27 #include <linux/errno.h>
28 #include <linux/kernel.h>
29 #include <linux/sched.h>
30 #include <linux/slab.h>
31 #include <linux/poll.h>
32 #include <linux/fcntl.h>
33 #include <linux/skbuff.h>
34 #include <linux/socket.h>
35 #include <linux/ioctl.h>
36 #include <linux/file.h>
37 #include <linux/wait.h>
38 #include <linux/kthread.h>
39 #include <net/sock.h>
40
41 #include <linux/isdn/capilli.h>
42 #include <linux/isdn/capicmd.h>
43 #include <linux/isdn/capiutil.h>
44
45 #include "cmtp.h"
46
47 #define CAPI_INTEROPERABILITY 0x20
48
49 #define CAPI_INTEROPERABILITY_REQ CAPICMD(CAPI_INTEROPERABILITY, CAPI_REQ)
50 #define CAPI_INTEROPERABILITY_CONF CAPICMD(CAPI_INTEROPERABILITY, CAPI_CONF)
51 #define CAPI_INTEROPERABILITY_IND CAPICMD(CAPI_INTEROPERABILITY, CAPI_IND)
52 #define CAPI_INTEROPERABILITY_RESP CAPICMD(CAPI_INTEROPERABILITY, CAPI_RESP)
53
54 #define CAPI_INTEROPERABILITY_REQ_LEN (CAPI_MSG_BASELEN + 2)
55 #define CAPI_INTEROPERABILITY_CONF_LEN (CAPI_MSG_BASELEN + 4)
56 #define CAPI_INTEROPERABILITY_IND_LEN (CAPI_MSG_BASELEN + 2)
57 #define CAPI_INTEROPERABILITY_RESP_LEN (CAPI_MSG_BASELEN + 2)
58
59 #define CAPI_FUNCTION_REGISTER 0
60 #define CAPI_FUNCTION_RELEASE 1
61 #define CAPI_FUNCTION_GET_PROFILE 2
62 #define CAPI_FUNCTION_GET_MANUFACTURER 3
63 #define CAPI_FUNCTION_GET_VERSION 4
64 #define CAPI_FUNCTION_GET_SERIAL_NUMBER 5
65 #define CAPI_FUNCTION_MANUFACTURER 6
66 #define CAPI_FUNCTION_LOOPBACK 7
67
68
69 #define CMTP_MSGNUM 1
70 #define CMTP_APPLID 2
71 #define CMTP_MAPPING 3
72
73 static struct cmtp_application *cmtp_application_add(struct cmtp_session *session, __u16 appl)
74 {
75 struct cmtp_application *app = kzalloc(sizeof(*app), GFP_KERNEL);
76
77 BT_DBG("session %p application %p appl %d", session, app, appl);
78
79 if (!app)
80 return NULL;
81
82 app->state = BT_OPEN;
83 app->appl = appl;
84
85 list_add_tail(&app->list, &session->applications);
86
87 return app;
88 }
89
90 static void cmtp_application_del(struct cmtp_session *session, struct cmtp_application *app)
91 {
92 BT_DBG("session %p application %p", session, app);
93
94 if (app) {
95 list_del(&app->list);
96 kfree(app);
97 }
98 }
99
100 static struct cmtp_application *cmtp_application_get(struct cmtp_session *session, int pattern, __u16 value)
101 {
102 struct cmtp_application *app;
103 struct list_head *p, *n;
104
105 list_for_each_safe(p, n, &session->applications) {
106 app = list_entry(p, struct cmtp_application, list);
107 switch (pattern) {
108 case CMTP_MSGNUM:
109 if (app->msgnum == value)
110 return app;
111 break;
112 case CMTP_APPLID:
113 if (app->appl == value)
114 return app;
115 break;
116 case CMTP_MAPPING:
117 if (app->mapping == value)
118 return app;
119 break;
120 }
121 }
122
123 return NULL;
124 }
125
126 static int cmtp_msgnum_get(struct cmtp_session *session)
127 {
128 session->msgnum++;
129
130 if ((session->msgnum & 0xff) > 200)
131 session->msgnum = CMTP_INITIAL_MSGNUM + 1;
132
133 return session->msgnum;
134 }
135
136 static void cmtp_send_capimsg(struct cmtp_session *session, struct sk_buff *skb)
137 {
138 struct cmtp_scb *scb = (void *) skb->cb;
139
140 BT_DBG("session %p skb %p len %d", session, skb, skb->len);
141
142 scb->id = -1;
143 scb->data = (CAPIMSG_COMMAND(skb->data) == CAPI_DATA_B3);
144
145 skb_queue_tail(&session->transmit, skb);
146
147 wake_up_interruptible(sk_sleep(session->sock->sk));
148 }
149
150 static void cmtp_send_interopmsg(struct cmtp_session *session,
151 __u8 subcmd, __u16 appl, __u16 msgnum,
152 __u16 function, unsigned char *buf, int len)
153 {
154 struct sk_buff *skb;
155 unsigned char *s;
156
157 BT_DBG("session %p subcmd 0x%02x appl %d msgnum %d", session, subcmd, appl, msgnum);
158
159 skb = alloc_skb(CAPI_MSG_BASELEN + 6 + len, GFP_ATOMIC);
160 if (!skb) {
161 BT_ERR("Can't allocate memory for interoperability packet");
162 return;
163 }
164
165 s = skb_put(skb, CAPI_MSG_BASELEN + 6 + len);
166
167 capimsg_setu16(s, 0, CAPI_MSG_BASELEN + 6 + len);
168 capimsg_setu16(s, 2, appl);
169 capimsg_setu8 (s, 4, CAPI_INTEROPERABILITY);
170 capimsg_setu8 (s, 5, subcmd);
171 capimsg_setu16(s, 6, msgnum);
172
173 /* Interoperability selector (Bluetooth Device Management) */
174 capimsg_setu16(s, 8, 0x0001);
175
176 capimsg_setu8 (s, 10, 3 + len);
177 capimsg_setu16(s, 11, function);
178 capimsg_setu8 (s, 13, len);
179
180 if (len > 0)
181 memcpy(s + 14, buf, len);
182
183 cmtp_send_capimsg(session, skb);
184 }
185
186 static void cmtp_recv_interopmsg(struct cmtp_session *session, struct sk_buff *skb)
187 {
188 struct capi_ctr *ctrl = &session->ctrl;
189 struct cmtp_application *application;
190 __u16 appl, msgnum, func, info;
191 __u32 controller;
192
193 BT_DBG("session %p skb %p len %d", session, skb, skb->len);
194
195 switch (CAPIMSG_SUBCOMMAND(skb->data)) {
196 case CAPI_CONF:
197 if (skb->len < CAPI_MSG_BASELEN + 10)
198 break;
199
200 func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 5);
201 info = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 8);
202
203 switch (func) {
204 case CAPI_FUNCTION_REGISTER:
205 msgnum = CAPIMSG_MSGID(skb->data);
206
207 application = cmtp_application_get(session, CMTP_MSGNUM, msgnum);
208 if (application) {
209 application->state = BT_CONNECTED;
210 application->msgnum = 0;
211 application->mapping = CAPIMSG_APPID(skb->data);
212 wake_up_interruptible(&session->wait);
213 }
214
215 break;
216
217 case CAPI_FUNCTION_RELEASE:
218 appl = CAPIMSG_APPID(skb->data);
219
220 application = cmtp_application_get(session, CMTP_MAPPING, appl);
221 if (application) {
222 application->state = BT_CLOSED;
223 application->msgnum = 0;
224 wake_up_interruptible(&session->wait);
225 }
226
227 break;
228
229 case CAPI_FUNCTION_GET_PROFILE:
230 if (skb->len < CAPI_MSG_BASELEN + 11 + sizeof(capi_profile))
231 break;
232
233 controller = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 11);
234 msgnum = CAPIMSG_MSGID(skb->data);
235
236 if (!info && (msgnum == CMTP_INITIAL_MSGNUM)) {
237 session->ncontroller = controller;
238 wake_up_interruptible(&session->wait);
239 break;
240 }
241
242 if (!info && ctrl) {
243 memcpy(&ctrl->profile,
244 skb->data + CAPI_MSG_BASELEN + 11,
245 sizeof(capi_profile));
246 session->state = BT_CONNECTED;
247 capi_ctr_ready(ctrl);
248 }
249
250 break;
251
252 case CAPI_FUNCTION_GET_MANUFACTURER:
253 if (skb->len < CAPI_MSG_BASELEN + 15)
254 break;
255
256 controller = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 10);
257
258 if (!info && ctrl) {
259 int len = min_t(uint, CAPI_MANUFACTURER_LEN,
260 skb->data[CAPI_MSG_BASELEN + 14]);
261
262 memset(ctrl->manu, 0, CAPI_MANUFACTURER_LEN);
263 strncpy(ctrl->manu,
264 skb->data + CAPI_MSG_BASELEN + 15, len);
265 }
266
267 break;
268
269 case CAPI_FUNCTION_GET_VERSION:
270 if (skb->len < CAPI_MSG_BASELEN + 32)
271 break;
272
273 controller = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 12);
274
275 if (!info && ctrl) {
276 ctrl->version.majorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 16);
277 ctrl->version.minorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 20);
278 ctrl->version.majormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 24);
279 ctrl->version.minormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 28);
280 }
281
282 break;
283
284 case CAPI_FUNCTION_GET_SERIAL_NUMBER:
285 if (skb->len < CAPI_MSG_BASELEN + 17)
286 break;
287
288 controller = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 12);
289
290 if (!info && ctrl) {
291 int len = min_t(uint, CAPI_SERIAL_LEN,
292 skb->data[CAPI_MSG_BASELEN + 16]);
293
294 memset(ctrl->serial, 0, CAPI_SERIAL_LEN);
295 strncpy(ctrl->serial,
296 skb->data + CAPI_MSG_BASELEN + 17, len);
297 }
298
299 break;
300 }
301
302 break;
303
304 case CAPI_IND:
305 if (skb->len < CAPI_MSG_BASELEN + 6)
306 break;
307
308 func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 3);
309
310 if (func == CAPI_FUNCTION_LOOPBACK) {
311 int len = min_t(uint, skb->len - CAPI_MSG_BASELEN - 6,
312 skb->data[CAPI_MSG_BASELEN + 5]);
313 appl = CAPIMSG_APPID(skb->data);
314 msgnum = CAPIMSG_MSGID(skb->data);
315 cmtp_send_interopmsg(session, CAPI_RESP, appl, msgnum, func,
316 skb->data + CAPI_MSG_BASELEN + 6, len);
317 }
318
319 break;
320 }
321
322 kfree_skb(skb);
323 }
324
325 void cmtp_recv_capimsg(struct cmtp_session *session, struct sk_buff *skb)
326 {
327 struct capi_ctr *ctrl = &session->ctrl;
328 struct cmtp_application *application;
329 __u16 appl;
330 __u32 contr;
331
332 BT_DBG("session %p skb %p len %d", session, skb, skb->len);
333
334 if (skb->len < CAPI_MSG_BASELEN)
335 return;
336
337 if (CAPIMSG_COMMAND(skb->data) == CAPI_INTEROPERABILITY) {
338 cmtp_recv_interopmsg(session, skb);
339 return;
340 }
341
342 if (session->flags & (1 << CMTP_LOOPBACK)) {
343 kfree_skb(skb);
344 return;
345 }
346
347 appl = CAPIMSG_APPID(skb->data);
348 contr = CAPIMSG_CONTROL(skb->data);
349
350 application = cmtp_application_get(session, CMTP_MAPPING, appl);
351 if (application) {
352 appl = application->appl;
353 CAPIMSG_SETAPPID(skb->data, appl);
354 } else {
355 BT_ERR("Can't find application with id %d", appl);
356 kfree_skb(skb);
357 return;
358 }
359
360 if ((contr & 0x7f) == 0x01) {
361 contr = (contr & 0xffffff80) | session->num;
362 CAPIMSG_SETCONTROL(skb->data, contr);
363 }
364
365 if (!ctrl) {
366 BT_ERR("Can't find controller %d for message", session->num);
367 kfree_skb(skb);
368 return;
369 }
370
371 capi_ctr_handle_message(ctrl, appl, skb);
372 }
373
374 static int cmtp_load_firmware(struct capi_ctr *ctrl, capiloaddata *data)
375 {
376 BT_DBG("ctrl %p data %p", ctrl, data);
377
378 return 0;
379 }
380
381 static void cmtp_reset_ctr(struct capi_ctr *ctrl)
382 {
383 struct cmtp_session *session = ctrl->driverdata;
384
385 BT_DBG("ctrl %p", ctrl);
386
387 capi_ctr_down(ctrl);
388
389 atomic_inc(&session->terminate);
390 wake_up_process(session->task);
391 }
392
393 static void cmtp_register_appl(struct capi_ctr *ctrl, __u16 appl, capi_register_params *rp)
394 {
395 DECLARE_WAITQUEUE(wait, current);
396 struct cmtp_session *session = ctrl->driverdata;
397 struct cmtp_application *application;
398 unsigned long timeo = CMTP_INTEROP_TIMEOUT;
399 unsigned char buf[8];
400 int err = 0, nconn, want = rp->level3cnt;
401
402 BT_DBG("ctrl %p appl %d level3cnt %d datablkcnt %d datablklen %d",
403 ctrl, appl, rp->level3cnt, rp->datablkcnt, rp->datablklen);
404
405 application = cmtp_application_add(session, appl);
406 if (!application) {
407 BT_ERR("Can't allocate memory for new application");
408 return;
409 }
410
411 if (want < 0)
412 nconn = ctrl->profile.nbchannel * -want;
413 else
414 nconn = want;
415
416 if (nconn == 0)
417 nconn = ctrl->profile.nbchannel;
418
419 capimsg_setu16(buf, 0, nconn);
420 capimsg_setu16(buf, 2, rp->datablkcnt);
421 capimsg_setu16(buf, 4, rp->datablklen);
422
423 application->state = BT_CONFIG;
424 application->msgnum = cmtp_msgnum_get(session);
425
426 cmtp_send_interopmsg(session, CAPI_REQ, 0x0000, application->msgnum,
427 CAPI_FUNCTION_REGISTER, buf, 6);
428
429 add_wait_queue(&session->wait, &wait);
430 while (1) {
431 set_current_state(TASK_INTERRUPTIBLE);
432
433 if (!timeo) {
434 err = -EAGAIN;
435 break;
436 }
437
438 if (application->state == BT_CLOSED) {
439 err = -application->err;
440 break;
441 }
442
443 if (application->state == BT_CONNECTED)
444 break;
445
446 if (signal_pending(current)) {
447 err = -EINTR;
448 break;
449 }
450
451 timeo = schedule_timeout(timeo);
452 }
453 set_current_state(TASK_RUNNING);
454 remove_wait_queue(&session->wait, &wait);
455
456 if (err) {
457 cmtp_application_del(session, application);
458 return;
459 }
460 }
461
462 static void cmtp_release_appl(struct capi_ctr *ctrl, __u16 appl)
463 {
464 struct cmtp_session *session = ctrl->driverdata;
465 struct cmtp_application *application;
466
467 BT_DBG("ctrl %p appl %d", ctrl, appl);
468
469 application = cmtp_application_get(session, CMTP_APPLID, appl);
470 if (!application) {
471 BT_ERR("Can't find application");
472 return;
473 }
474
475 application->msgnum = cmtp_msgnum_get(session);
476
477 cmtp_send_interopmsg(session, CAPI_REQ, application->mapping, application->msgnum,
478 CAPI_FUNCTION_RELEASE, NULL, 0);
479
480 wait_event_interruptible_timeout(session->wait,
481 (application->state == BT_CLOSED), CMTP_INTEROP_TIMEOUT);
482
483 cmtp_application_del(session, application);
484 }
485
486 static u16 cmtp_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
487 {
488 struct cmtp_session *session = ctrl->driverdata;
489 struct cmtp_application *application;
490 __u16 appl;
491 __u32 contr;
492
493 BT_DBG("ctrl %p skb %p", ctrl, skb);
494
495 appl = CAPIMSG_APPID(skb->data);
496 contr = CAPIMSG_CONTROL(skb->data);
497
498 application = cmtp_application_get(session, CMTP_APPLID, appl);
499 if ((!application) || (application->state != BT_CONNECTED)) {
500 BT_ERR("Can't find application with id %d", appl);
501 return CAPI_ILLAPPNR;
502 }
503
504 CAPIMSG_SETAPPID(skb->data, application->mapping);
505
506 if ((contr & 0x7f) == session->num) {
507 contr = (contr & 0xffffff80) | 0x01;
508 CAPIMSG_SETCONTROL(skb->data, contr);
509 }
510
511 cmtp_send_capimsg(session, skb);
512
513 return CAPI_NOERROR;
514 }
515
516 static char *cmtp_procinfo(struct capi_ctr *ctrl)
517 {
518 return "CAPI Message Transport Protocol";
519 }
520
521 static int cmtp_proc_show(struct seq_file *m, void *v)
522 {
523 struct capi_ctr *ctrl = m->private;
524 struct cmtp_session *session = ctrl->driverdata;
525 struct cmtp_application *app;
526 struct list_head *p, *n;
527
528 seq_printf(m, "%s\n\n", cmtp_procinfo(ctrl));
529 seq_printf(m, "addr %s\n", session->name);
530 seq_printf(m, "ctrl %d\n", session->num);
531
532 list_for_each_safe(p, n, &session->applications) {
533 app = list_entry(p, struct cmtp_application, list);
534 seq_printf(m, "appl %d -> %d\n", app->appl, app->mapping);
535 }
536
537 return 0;
538 }
539
540 static int cmtp_proc_open(struct inode *inode, struct file *file)
541 {
542 return single_open(file, cmtp_proc_show, PDE_DATA(inode));
543 }
544
545 static const struct file_operations cmtp_proc_fops = {
546 .owner = THIS_MODULE,
547 .open = cmtp_proc_open,
548 .read = seq_read,
549 .llseek = seq_lseek,
550 .release = single_release,
551 };
552
553 int cmtp_attach_device(struct cmtp_session *session)
554 {
555 unsigned char buf[4];
556 long ret;
557
558 BT_DBG("session %p", session);
559
560 capimsg_setu32(buf, 0, 0);
561
562 cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, CMTP_INITIAL_MSGNUM,
563 CAPI_FUNCTION_GET_PROFILE, buf, 4);
564
565 ret = wait_event_interruptible_timeout(session->wait,
566 session->ncontroller, CMTP_INTEROP_TIMEOUT);
567
568 BT_INFO("Found %d CAPI controller(s) on device %s", session->ncontroller, session->name);
569
570 if (!ret)
571 return -ETIMEDOUT;
572
573 if (!session->ncontroller)
574 return -ENODEV;
575
576 if (session->ncontroller > 1)
577 BT_INFO("Setting up only CAPI controller 1");
578
579 session->ctrl.owner = THIS_MODULE;
580 session->ctrl.driverdata = session;
581 strcpy(session->ctrl.name, session->name);
582
583 session->ctrl.driver_name = "cmtp";
584 session->ctrl.load_firmware = cmtp_load_firmware;
585 session->ctrl.reset_ctr = cmtp_reset_ctr;
586 session->ctrl.register_appl = cmtp_register_appl;
587 session->ctrl.release_appl = cmtp_release_appl;
588 session->ctrl.send_message = cmtp_send_message;
589
590 session->ctrl.procinfo = cmtp_procinfo;
591 session->ctrl.proc_fops = &cmtp_proc_fops;
592
593 if (attach_capi_ctr(&session->ctrl) < 0) {
594 BT_ERR("Can't attach new controller");
595 return -EBUSY;
596 }
597
598 session->num = session->ctrl.cnr;
599
600 BT_DBG("session %p num %d", session, session->num);
601
602 capimsg_setu32(buf, 0, 1);
603
604 cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
605 CAPI_FUNCTION_GET_MANUFACTURER, buf, 4);
606
607 cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
608 CAPI_FUNCTION_GET_VERSION, buf, 4);
609
610 cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
611 CAPI_FUNCTION_GET_SERIAL_NUMBER, buf, 4);
612
613 cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
614 CAPI_FUNCTION_GET_PROFILE, buf, 4);
615
616 return 0;
617 }
618
619 void cmtp_detach_device(struct cmtp_session *session)
620 {
621 BT_DBG("session %p", session);
622
623 detach_capi_ctr(&session->ctrl);
624 }
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