net/bluetooth/cmtp/capi.c

   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/config.h>
  24 #include <linux/module.h>
  25
  26 #include <linux/types.h>
  27 #include <linux/errno.h>
  28 #include <linux/kernel.h>
  29 #include <linux/major.h>
  30 #include <linux/sched.h>
  31 #include <linux/slab.h>
  32 #include <linux/poll.h>
  33 #include <linux/fcntl.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/socket.h>
  36 #include <linux/ioctl.h>
  37 #include <linux/file.h>
  38 #include <net/sock.h>
  39
  40 #include <linux/isdn/capilli.h>
  41 #include <linux/isdn/capicmd.h>
  42 #include <linux/isdn/capiutil.h>
  43
  44 #include "cmtp.h"
  45
  46 #ifndef CONFIG_BT_CMTP_DEBUG
  47 #undef  BT_DBG
  48 #define BT_DBG(D...)
  49 #endif
  50
  51 #define CAPI_INTEROPERABILITY           0x20
  52
  53 #define CAPI_INTEROPERABILITY_REQ       CAPICMD(CAPI_INTEROPERABILITY, CAPI_REQ)
  54 #define CAPI_INTEROPERABILITY_CONF      CAPICMD(CAPI_INTEROPERABILITY, CAPI_CONF)
  55 #define CAPI_INTEROPERABILITY_IND       CAPICMD(CAPI_INTEROPERABILITY, CAPI_IND)
  56 #define CAPI_INTEROPERABILITY_RESP      CAPICMD(CAPI_INTEROPERABILITY, CAPI_RESP)
  57
  58 #define CAPI_INTEROPERABILITY_REQ_LEN   (CAPI_MSG_BASELEN + 2)
  59 #define CAPI_INTEROPERABILITY_CONF_LEN  (CAPI_MSG_BASELEN + 4)
  60 #define CAPI_INTEROPERABILITY_IND_LEN   (CAPI_MSG_BASELEN + 2)
  61 #define CAPI_INTEROPERABILITY_RESP_LEN  (CAPI_MSG_BASELEN + 2)
  62
  63 #define CAPI_FUNCTION_REGISTER          0
  64 #define CAPI_FUNCTION_RELEASE           1
  65 #define CAPI_FUNCTION_GET_PROFILE       2
  66 #define CAPI_FUNCTION_GET_MANUFACTURER  3
  67 #define CAPI_FUNCTION_GET_VERSION       4
  68 #define CAPI_FUNCTION_GET_SERIAL_NUMBER 5
  69 #define CAPI_FUNCTION_MANUFACTURER      6
  70 #define CAPI_FUNCTION_LOOPBACK          7
  71
  72
  73 #define CMTP_MSGNUM     1
  74 #define CMTP_APPLID     2
  75 #define CMTP_MAPPING    3
  76
  77 static struct cmtp_application *cmtp_application_add(struct cmtp_session *session, __u16 appl)
  78 {
  79         struct cmtp_application *app = kmalloc(sizeof(*app), GFP_KERNEL);
  80
  81         BT_DBG("session %p application %p appl %d", session, app, appl);
  82
  83         if (!app)
  84                 return NULL;
  85
  86         memset(app, 0, sizeof(*app));
  87
  88         app->state = BT_OPEN;
  89         app->appl = appl;
  90
  91         list_add_tail(&app->list, &session->applications);
  92
  93         return app;
  94 }
  95
  96 static void cmtp_application_del(struct cmtp_session *session, struct cmtp_application *app)
  97 {
  98         BT_DBG("session %p application %p", session, app);
  99
 100         if (app) {
 101                 list_del(&app->list);
 102                 kfree(app);
 103         }
 104 }
 105
 106 static struct cmtp_application *cmtp_application_get(struct cmtp_session *session, int pattern, __u16 value)
 107 {
 108         struct cmtp_application *app;
 109         struct list_head *p, *n;
 110
 111         list_for_each_safe(p, n, &session->applications) {
 112                 app = list_entry(p, struct cmtp_application, list);
 113                 switch (pattern) {
 114                 case CMTP_MSGNUM:
 115                         if (app->msgnum == value)
 116                                 return app;
 117                         break;
 118                 case CMTP_APPLID:
 119                         if (app->appl == value)
 120                                 return app;
 121                         break;
 122                 case CMTP_MAPPING:
 123                         if (app->mapping == value)
 124                                 return app;
 125                         break;
 126                 }
 127         }
 128
 129         return NULL;
 130 }
 131
 132 static int cmtp_msgnum_get(struct cmtp_session *session)
 133 {
 134         session->msgnum++;
 135
 136         if ((session->msgnum & 0xff) > 200)
 137                 session->msgnum = CMTP_INITIAL_MSGNUM + 1;
 138
 139         return session->msgnum;
 140 }
 141
 142
 143 static void cmtp_send_interopmsg(struct cmtp_session *session,
 144                                         __u8 subcmd, __u16 appl, __u16 msgnum,
 145                                         __u16 function, unsigned char *buf, int len)
 146 {
 147         struct sk_buff *skb;
 148         unsigned char *s;
 149
 150         BT_DBG("session %p subcmd 0x%02x appl %d msgnum %d", session, subcmd, appl, msgnum);
 151
 152         if (!(skb = alloc_skb(CAPI_MSG_BASELEN + 6 + len, GFP_ATOMIC))) {
 153                 BT_ERR("Can't allocate memory for interoperability packet");
 154                 return;
 155         }
 156
 157         s = skb_put(skb, CAPI_MSG_BASELEN + 6 + len);
 158
 159         capimsg_setu16(s, 0, CAPI_MSG_BASELEN + 6 + len);
 160         capimsg_setu16(s, 2, appl);
 161         capimsg_setu8 (s, 4, CAPI_INTEROPERABILITY);
 162         capimsg_setu8 (s, 5, subcmd);
 163         capimsg_setu16(s, 6, msgnum);
 164
 165         /* Interoperability selector (Bluetooth Device Management) */
 166         capimsg_setu16(s, 8, 0x0001);
 167
 168         capimsg_setu8 (s, 10, 3 + len);
 169         capimsg_setu16(s, 11, function);
 170         capimsg_setu8 (s, 13, len);
 171
 172         if (len > 0)
 173                 memcpy(s + 14, buf, len);
 174
 175         cmtp_send_capimsg(session, skb);
 176 }
 177
 178 static void cmtp_recv_interopmsg(struct cmtp_session *session, struct sk_buff *skb)
 179 {
 180         struct capi_ctr *ctrl = &session->ctrl;
 181         struct cmtp_application *application;
 182         __u16 appl, msgnum, func, info;
 183         __u32 controller;
 184
 185         BT_DBG("session %p skb %p len %d", session, skb, skb->len);
 186
 187         switch (CAPIMSG_SUBCOMMAND(skb->data)) {
 188         case CAPI_CONF:
 189                 func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 5);
 190                 info = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 8);
 191
 192                 switch (func) {
 193                 case CAPI_FUNCTION_REGISTER:
 194                         msgnum = CAPIMSG_MSGID(skb->data);
 195
 196                         application = cmtp_application_get(session, CMTP_MSGNUM, msgnum);
 197                         if (application) {
 198                                 application->state = BT_CONNECTED;
 199                                 application->msgnum = 0;
 200                                 application->mapping = CAPIMSG_APPID(skb->data);
 201                                 wake_up_interruptible(&session->wait);
 202                         }
 203
 204                         break;
 205
 206                 case CAPI_FUNCTION_RELEASE:
 207                         appl = CAPIMSG_APPID(skb->data);
 208
 209                         application = cmtp_application_get(session, CMTP_MAPPING, appl);
 210                         if (application) {
 211                                 application->state = BT_CLOSED;
 212                                 application->msgnum = 0;
 213                                 wake_up_interruptible(&session->wait);
 214                         }
 215
 216                         break;
 217
 218                 case CAPI_FUNCTION_GET_PROFILE:
 219                         controller = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 11);
 220                         msgnum = CAPIMSG_MSGID(skb->data);
 221
 222                         if (!info && (msgnum == CMTP_INITIAL_MSGNUM)) {
 223                                 session->ncontroller = controller;
 224                                 wake_up_interruptible(&session->wait);
 225                                 break;
 226                         }
 227
 228                         if (!info && ctrl) {
 229                                 memcpy(&ctrl->profile,
 230                                         skb->data + CAPI_MSG_BASELEN + 11,
 231                                         sizeof(capi_profile));
 232                                 session->state = BT_CONNECTED;
 233                                 capi_ctr_ready(ctrl);
 234                         }
 235
 236                         break;
 237
 238                 case CAPI_FUNCTION_GET_MANUFACTURER:
 239                         controller = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 10);
 240
 241                         if (!info && ctrl) {
 242                                 strncpy(ctrl->manu,
 243                                         skb->data + CAPI_MSG_BASELEN + 15,
 244                                         skb->data[CAPI_MSG_BASELEN + 14]);
 245                         }
 246
 247                         break;
 248
 249                 case CAPI_FUNCTION_GET_VERSION:
 250                         controller = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 12);
 251
 252                         if (!info && ctrl) {
 253                                 ctrl->version.majorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 16);
 254                                 ctrl->version.minorversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 20);
 255                                 ctrl->version.majormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 24);
 256                                 ctrl->version.minormanuversion = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 28);
 257                         }
 258
 259                         break;
 260
 261                 case CAPI_FUNCTION_GET_SERIAL_NUMBER:
 262                         controller = CAPIMSG_U32(skb->data, CAPI_MSG_BASELEN + 12);
 263
 264                         if (!info && ctrl) {
 265                                 memset(ctrl->serial, 0, CAPI_SERIAL_LEN);
 266                                 strncpy(ctrl->serial,
 267                                         skb->data + CAPI_MSG_BASELEN + 17,
 268                                         skb->data[CAPI_MSG_BASELEN + 16]);
 269                         }
 270
 271                         break;
 272                 }
 273
 274                 break;
 275
 276         case CAPI_IND:
 277                 func = CAPIMSG_U16(skb->data, CAPI_MSG_BASELEN + 3);
 278
 279                 if (func == CAPI_FUNCTION_LOOPBACK) {
 280                         appl = CAPIMSG_APPID(skb->data);
 281                         msgnum = CAPIMSG_MSGID(skb->data);
 282                         cmtp_send_interopmsg(session, CAPI_RESP, appl, msgnum, func,
 283                                                 skb->data + CAPI_MSG_BASELEN + 6,
 284                                                 skb->data[CAPI_MSG_BASELEN + 5]);
 285                 }
 286
 287                 break;
 288         }
 289
 290         kfree_skb(skb);
 291 }
 292
 293 void cmtp_recv_capimsg(struct cmtp_session *session, struct sk_buff *skb)
 294 {
 295         struct capi_ctr *ctrl = &session->ctrl;
 296         struct cmtp_application *application;
 297         __u16 cmd, appl;
 298         __u32 contr;
 299
 300         BT_DBG("session %p skb %p len %d", session, skb, skb->len);
 301
 302         if (CAPIMSG_COMMAND(skb->data) == CAPI_INTEROPERABILITY) {
 303                 cmtp_recv_interopmsg(session, skb);
 304                 return;
 305         }
 306
 307         if (session->flags & (1 << CMTP_LOOPBACK)) {
 308                 kfree_skb(skb);
 309                 return;
 310         }
 311
 312         cmd = CAPICMD(CAPIMSG_COMMAND(skb->data), CAPIMSG_SUBCOMMAND(skb->data));
 313         appl = CAPIMSG_APPID(skb->data);
 314         contr = CAPIMSG_CONTROL(skb->data);
 315
 316         application = cmtp_application_get(session, CMTP_MAPPING, appl);
 317         if (application) {
 318                 appl = application->appl;
 319                 CAPIMSG_SETAPPID(skb->data, appl);
 320         } else {
 321                 BT_ERR("Can't find application with id %d", appl);
 322                 kfree_skb(skb);
 323                 return;
 324         }
 325
 326         if ((contr & 0x7f) == 0x01) {
 327                 contr = (contr & 0xffffff80) | session->num;
 328                 CAPIMSG_SETCONTROL(skb->data, contr);
 329         }
 330
 331         if (!ctrl) {
 332                 BT_ERR("Can't find controller %d for message", session->num);
 333                 kfree_skb(skb);
 334                 return;
 335         }
 336
 337         capi_ctr_handle_message(ctrl, appl, skb);
 338 }
 339
 340 void cmtp_send_capimsg(struct cmtp_session *session, struct sk_buff *skb)
 341 {
 342         struct cmtp_scb *scb = (void *) skb->cb;
 343
 344         BT_DBG("session %p skb %p len %d", session, skb, skb->len);
 345
 346         scb->id = -1;
 347         scb->data = (CAPIMSG_COMMAND(skb->data) == CAPI_DATA_B3);
 348
 349         skb_queue_tail(&session->transmit, skb);
 350
 351         cmtp_schedule(session);
 352 }
 353
 354
 355 static int cmtp_load_firmware(struct capi_ctr *ctrl, capiloaddata *data)
 356 {
 357         BT_DBG("ctrl %p data %p", ctrl, data);
 358
 359         return 0;
 360 }
 361
 362 static void cmtp_reset_ctr(struct capi_ctr *ctrl)
 363 {
 364         struct cmtp_session *session = ctrl->driverdata;
 365
 366         BT_DBG("ctrl %p", ctrl);
 367
 368         capi_ctr_reseted(ctrl);
 369
 370         atomic_inc(&session->terminate);
 371         cmtp_schedule(session);
 372 }
 373
 374 static void cmtp_register_appl(struct capi_ctr *ctrl, __u16 appl, capi_register_params *rp)
 375 {
 376         DECLARE_WAITQUEUE(wait, current);
 377         struct cmtp_session *session = ctrl->driverdata;
 378         struct cmtp_application *application;
 379         unsigned long timeo = CMTP_INTEROP_TIMEOUT;
 380         unsigned char buf[8];
 381         int err = 0, nconn, want = rp->level3cnt;
 382
 383         BT_DBG("ctrl %p appl %d level3cnt %d datablkcnt %d datablklen %d",
 384                 ctrl, appl, rp->level3cnt, rp->datablkcnt, rp->datablklen);
 385
 386         application = cmtp_application_add(session, appl);
 387         if (!application) {
 388                 BT_ERR("Can't allocate memory for new application");
 389                 return;
 390         }
 391
 392         if (want < 0)
 393                 nconn = ctrl->profile.nbchannel * -want;
 394         else
 395                 nconn = want;
 396
 397         if (nconn == 0)
 398                 nconn = ctrl->profile.nbchannel;
 399
 400         capimsg_setu16(buf, 0, nconn);
 401         capimsg_setu16(buf, 2, rp->datablkcnt);
 402         capimsg_setu16(buf, 4, rp->datablklen);
 403
 404         application->state = BT_CONFIG;
 405         application->msgnum = cmtp_msgnum_get(session);
 406
 407         cmtp_send_interopmsg(session, CAPI_REQ, 0x0000, application->msgnum,
 408                                 CAPI_FUNCTION_REGISTER, buf, 6);
 409
 410         add_wait_queue(&session->wait, &wait);
 411         while (1) {
 412                 set_current_state(TASK_INTERRUPTIBLE);
 413
 414                 if (!timeo) {
 415                         err = -EAGAIN;
 416                         break;
 417                 }
 418
 419                 if (application->state == BT_CLOSED) {
 420                         err = -application->err;
 421                         break;
 422                 }
 423
 424                 if (application->state == BT_CONNECTED)
 425                         break;
 426
 427                 if (signal_pending(current)) {
 428                         err = -EINTR;
 429                         break;
 430                 }
 431
 432                 timeo = schedule_timeout(timeo);
 433         }
 434         set_current_state(TASK_RUNNING);
 435         remove_wait_queue(&session->wait, &wait);
 436
 437         if (err) {
 438                 cmtp_application_del(session, application);
 439                 return;
 440         }
 441 }
 442
 443 static void cmtp_release_appl(struct capi_ctr *ctrl, __u16 appl)
 444 {
 445         DECLARE_WAITQUEUE(wait, current);
 446         struct cmtp_session *session = ctrl->driverdata;
 447         struct cmtp_application *application;
 448         unsigned long timeo = CMTP_INTEROP_TIMEOUT;
 449
 450         BT_DBG("ctrl %p appl %d", ctrl, appl);
 451
 452         application = cmtp_application_get(session, CMTP_APPLID, appl);
 453         if (!application) {
 454                 BT_ERR("Can't find application");
 455                 return;
 456         }
 457
 458         application->msgnum = cmtp_msgnum_get(session);
 459
 460         cmtp_send_interopmsg(session, CAPI_REQ, application->mapping, application->msgnum,
 461                                 CAPI_FUNCTION_RELEASE, NULL, 0);
 462
 463         add_wait_queue(&session->wait, &wait);
 464         while (timeo) {
 465                 set_current_state(TASK_INTERRUPTIBLE);
 466
 467                 if (application->state == BT_CLOSED)
 468                         break;
 469
 470                 if (signal_pending(current))
 471                         break;
 472
 473                 timeo = schedule_timeout(timeo);
 474         }
 475         set_current_state(TASK_RUNNING);
 476         remove_wait_queue(&session->wait, &wait);
 477
 478         cmtp_application_del(session, application);
 479 }
 480
 481 static u16 cmtp_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
 482 {
 483         struct cmtp_session *session = ctrl->driverdata;
 484         struct cmtp_application *application;
 485         __u16 appl;
 486         __u32 contr;
 487
 488         BT_DBG("ctrl %p skb %p", ctrl, skb);
 489
 490         appl = CAPIMSG_APPID(skb->data);
 491         contr = CAPIMSG_CONTROL(skb->data);
 492
 493         application = cmtp_application_get(session, CMTP_APPLID, appl);
 494         if ((!application) || (application->state != BT_CONNECTED)) {
 495                 BT_ERR("Can't find application with id %d", appl);
 496                 return CAPI_ILLAPPNR;
 497         }
 498
 499         CAPIMSG_SETAPPID(skb->data, application->mapping);
 500
 501         if ((contr & 0x7f) == session->num) {
 502                 contr = (contr & 0xffffff80) | 0x01;
 503                 CAPIMSG_SETCONTROL(skb->data, contr);
 504         }
 505
 506         cmtp_send_capimsg(session, skb);
 507
 508         return CAPI_NOERROR;
 509 }
 510
 511 static char *cmtp_procinfo(struct capi_ctr *ctrl)
 512 {
 513         return "CAPI Message Transport Protocol";
 514 }
 515
 516 static int cmtp_ctr_read_proc(char *page, char **start, off_t off, int count, int *eof, struct capi_ctr *ctrl)
 517 {
 518         struct cmtp_session *session = ctrl->driverdata;
 519         struct cmtp_application *app;
 520         struct list_head *p, *n;
 521         int len = 0;
 522
 523         len += sprintf(page + len, "%s\n\n", cmtp_procinfo(ctrl));
 524         len += sprintf(page + len, "addr %s\n", session->name);
 525         len += sprintf(page + len, "ctrl %d\n", session->num);
 526
 527         list_for_each_safe(p, n, &session->applications) {
 528                 app = list_entry(p, struct cmtp_application, list);
 529                 len += sprintf(page + len, "appl %d -> %d\n", app->appl, app->mapping);
 530         }
 531
 532         if (off + count >= len)
 533                 *eof = 1;
 534
 535         if (len < off)
 536                 return 0;
 537
 538         *start = page + off;
 539
 540         return ((count < len - off) ? count : len - off);
 541 }
 542
 543
 544 int cmtp_attach_device(struct cmtp_session *session)
 545 {
 546         DECLARE_WAITQUEUE(wait, current);
 547         unsigned long timeo = CMTP_INTEROP_TIMEOUT;
 548         unsigned char buf[4];
 549
 550         BT_DBG("session %p", session);
 551
 552         capimsg_setu32(buf, 0, 0);
 553
 554         cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, CMTP_INITIAL_MSGNUM,
 555                                 CAPI_FUNCTION_GET_PROFILE, buf, 4);
 556
 557         add_wait_queue(&session->wait, &wait);
 558         while (timeo) {
 559                 set_current_state(TASK_INTERRUPTIBLE);
 560
 561                 if (session->ncontroller)
 562                         break;
 563
 564                 if (signal_pending(current))
 565                         break;
 566
 567                 timeo = schedule_timeout(timeo);
 568         }
 569         set_current_state(TASK_RUNNING);
 570         remove_wait_queue(&session->wait, &wait);
 571
 572         BT_INFO("Found %d CAPI controller(s) on device %s", session->ncontroller, session->name);
 573
 574         if (!timeo)
 575                 return -ETIMEDOUT;
 576
 577         if (!session->ncontroller)
 578                 return -ENODEV;
 579
 580
 581         if (session->ncontroller > 1)
 582                 BT_INFO("Setting up only CAPI controller 1");
 583
 584         session->ctrl.owner      = THIS_MODULE;
 585         session->ctrl.driverdata = session;
 586         strcpy(session->ctrl.name, session->name);
 587
 588         session->ctrl.driver_name   = "cmtp";
 589         session->ctrl.load_firmware = cmtp_load_firmware;
 590         session->ctrl.reset_ctr     = cmtp_reset_ctr;
 591         session->ctrl.register_appl = cmtp_register_appl;
 592         session->ctrl.release_appl  = cmtp_release_appl;
 593         session->ctrl.send_message  = cmtp_send_message;
 594
 595         session->ctrl.procinfo      = cmtp_procinfo;
 596         session->ctrl.ctr_read_proc = cmtp_ctr_read_proc;
 597
 598         if (attach_capi_ctr(&session->ctrl) < 0) {
 599                 BT_ERR("Can't attach new controller");
 600                 return -EBUSY;
 601         }
 602
 603         session->num = session->ctrl.cnr;
 604
 605         BT_DBG("session %p num %d", session, session->num);
 606
 607         capimsg_setu32(buf, 0, 1);
 608
 609         cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
 610                                 CAPI_FUNCTION_GET_MANUFACTURER, buf, 4);
 611
 612         cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
 613                                 CAPI_FUNCTION_GET_VERSION, buf, 4);
 614
 615         cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
 616                                 CAPI_FUNCTION_GET_SERIAL_NUMBER, buf, 4);
 617
 618         cmtp_send_interopmsg(session, CAPI_REQ, 0xffff, cmtp_msgnum_get(session),
 619                                 CAPI_FUNCTION_GET_PROFILE, buf, 4);
 620
 621         return 0;
 622 }
 623
 624 void cmtp_detach_device(struct cmtp_session *session)
 625 {
 626         BT_DBG("session %p", session);
 627
 628         detach_capi_ctr(&session->ctrl);
 629 }