1 /* 2 HIDP implementation for Linux Bluetooth stack (BlueZ). 3 Copyright (C) 2003-2004 Marcel Holtmann <marcel@holtmann.org> 4 Copyright (C) 2013 David Herrmann <dh.herrmann@gmail.com> 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License version 2 as 8 published by the Free Software Foundation; 9 10 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 11 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 12 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 13 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 14 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 15 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 19 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 20 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 21 SOFTWARE IS DISCLAIMED. 22 */ 23 24 #include <linux/kref.h> 25 #include <linux/module.h> 26 #include <linux/file.h> 27 #include <linux/kthread.h> 28 #include <linux/hidraw.h> 29 30 #include <net/bluetooth/bluetooth.h> 31 #include <net/bluetooth/hci_core.h> 32 #include <net/bluetooth/l2cap.h> 33 34 #include "hidp.h" 35 36 #define VERSION "1.2" 37 38 static DECLARE_RWSEM(hidp_session_sem); 39 static LIST_HEAD(hidp_session_list); 40 41 static unsigned char hidp_keycode[256] = { 42 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 43 37, 38, 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 44 21, 44, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 45 14, 15, 57, 12, 13, 26, 27, 43, 43, 39, 40, 41, 51, 52, 46 53, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 87, 88, 47 99, 70, 119, 110, 102, 104, 111, 107, 109, 106, 105, 108, 103, 69, 48 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 72, 73, 49 82, 83, 86, 127, 116, 117, 183, 184, 185, 186, 187, 188, 189, 190, 50 191, 192, 193, 194, 134, 138, 130, 132, 128, 129, 131, 137, 133, 135, 51 136, 113, 115, 114, 0, 0, 0, 121, 0, 89, 93, 124, 92, 94, 52 95, 0, 0, 0, 122, 123, 90, 91, 85, 0, 0, 0, 0, 0, 53 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 54 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 55 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 56 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 57 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 58 29, 42, 56, 125, 97, 54, 100, 126, 164, 166, 165, 163, 161, 115, 59 114, 113, 150, 158, 159, 128, 136, 177, 178, 176, 142, 152, 173, 140 60 }; 61 62 static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 }; 63 64 static int hidp_session_probe(struct l2cap_conn *conn, 65 struct l2cap_user *user); 66 static void hidp_session_remove(struct l2cap_conn *conn, 67 struct l2cap_user *user); 68 static int hidp_session_thread(void *arg); 69 static void hidp_session_terminate(struct hidp_session *s); 70 71 static void hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci) 72 { 73 u32 valid_flags = 0; 74 memset(ci, 0, sizeof(*ci)); 75 bacpy(&ci->bdaddr, &session->bdaddr); 76 77 ci->flags = session->flags & valid_flags; 78 ci->state = BT_CONNECTED; 79 80 if (session->input) { 81 ci->vendor = session->input->id.vendor; 82 ci->product = session->input->id.product; 83 ci->version = session->input->id.version; 84 if (session->input->name) 85 strlcpy(ci->name, session->input->name, 128); 86 else 87 strlcpy(ci->name, "HID Boot Device", 128); 88 } else if (session->hid) { 89 ci->vendor = session->hid->vendor; 90 ci->product = session->hid->product; 91 ci->version = session->hid->version; 92 strlcpy(ci->name, session->hid->name, 128); 93 } 94 } 95 96 /* assemble skb, queue message on @transmit and wake up the session thread */ 97 static int hidp_send_message(struct hidp_session *session, struct socket *sock, 98 struct sk_buff_head *transmit, unsigned char hdr, 99 const unsigned char *data, int size) 100 { 101 struct sk_buff *skb; 102 struct sock *sk = sock->sk; 103 104 BT_DBG("session %p data %p size %d", session, data, size); 105 106 if (atomic_read(&session->terminate)) 107 return -EIO; 108 109 skb = alloc_skb(size + 1, GFP_ATOMIC); 110 if (!skb) { 111 BT_ERR("Can't allocate memory for new frame"); 112 return -ENOMEM; 113 } 114 115 *skb_put(skb, 1) = hdr; 116 if (data && size > 0) 117 memcpy(skb_put(skb, size), data, size); 118 119 skb_queue_tail(transmit, skb); 120 wake_up_interruptible(sk_sleep(sk)); 121 122 return 0; 123 } 124 125 static int hidp_send_ctrl_message(struct hidp_session *session, 126 unsigned char hdr, const unsigned char *data, 127 int size) 128 { 129 return hidp_send_message(session, session->ctrl_sock, 130 &session->ctrl_transmit, hdr, data, size); 131 } 132 133 static int hidp_send_intr_message(struct hidp_session *session, 134 unsigned char hdr, const unsigned char *data, 135 int size) 136 { 137 return hidp_send_message(session, session->intr_sock, 138 &session->intr_transmit, hdr, data, size); 139 } 140 141 static int hidp_input_event(struct input_dev *dev, unsigned int type, 142 unsigned int code, int value) 143 { 144 struct hidp_session *session = input_get_drvdata(dev); 145 unsigned char newleds; 146 unsigned char hdr, data[2]; 147 148 BT_DBG("session %p type %d code %d value %d", 149 session, type, code, value); 150 151 if (type != EV_LED) 152 return -1; 153 154 newleds = (!!test_bit(LED_KANA, dev->led) << 3) | 155 (!!test_bit(LED_COMPOSE, dev->led) << 3) | 156 (!!test_bit(LED_SCROLLL, dev->led) << 2) | 157 (!!test_bit(LED_CAPSL, dev->led) << 1) | 158 (!!test_bit(LED_NUML, dev->led) << 0); 159 160 if (session->leds == newleds) 161 return 0; 162 163 session->leds = newleds; 164 165 hdr = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT; 166 data[0] = 0x01; 167 data[1] = newleds; 168 169 return hidp_send_intr_message(session, hdr, data, 2); 170 } 171 172 static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb) 173 { 174 struct input_dev *dev = session->input; 175 unsigned char *keys = session->keys; 176 unsigned char *udata = skb->data + 1; 177 signed char *sdata = skb->data + 1; 178 int i, size = skb->len - 1; 179 180 switch (skb->data[0]) { 181 case 0x01: /* Keyboard report */ 182 for (i = 0; i < 8; i++) 183 input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1); 184 185 /* If all the key codes have been set to 0x01, it means 186 * too many keys were pressed at the same time. */ 187 if (!memcmp(udata + 2, hidp_mkeyspat, 6)) 188 break; 189 190 for (i = 2; i < 8; i++) { 191 if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) { 192 if (hidp_keycode[keys[i]]) 193 input_report_key(dev, hidp_keycode[keys[i]], 0); 194 else 195 BT_ERR("Unknown key (scancode %#x) released.", keys[i]); 196 } 197 198 if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) { 199 if (hidp_keycode[udata[i]]) 200 input_report_key(dev, hidp_keycode[udata[i]], 1); 201 else 202 BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]); 203 } 204 } 205 206 memcpy(keys, udata, 8); 207 break; 208 209 case 0x02: /* Mouse report */ 210 input_report_key(dev, BTN_LEFT, sdata[0] & 0x01); 211 input_report_key(dev, BTN_RIGHT, sdata[0] & 0x02); 212 input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04); 213 input_report_key(dev, BTN_SIDE, sdata[0] & 0x08); 214 input_report_key(dev, BTN_EXTRA, sdata[0] & 0x10); 215 216 input_report_rel(dev, REL_X, sdata[1]); 217 input_report_rel(dev, REL_Y, sdata[2]); 218 219 if (size > 3) 220 input_report_rel(dev, REL_WHEEL, sdata[3]); 221 break; 222 } 223 224 input_sync(dev); 225 } 226 227 static int hidp_get_raw_report(struct hid_device *hid, 228 unsigned char report_number, 229 unsigned char *data, size_t count, 230 unsigned char report_type) 231 { 232 struct hidp_session *session = hid->driver_data; 233 struct sk_buff *skb; 234 size_t len; 235 int numbered_reports = hid->report_enum[report_type].numbered; 236 int ret; 237 238 if (atomic_read(&session->terminate)) 239 return -EIO; 240 241 switch (report_type) { 242 case HID_FEATURE_REPORT: 243 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_FEATURE; 244 break; 245 case HID_INPUT_REPORT: 246 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_INPUT; 247 break; 248 case HID_OUTPUT_REPORT: 249 report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_OUPUT; 250 break; 251 default: 252 return -EINVAL; 253 } 254 255 if (mutex_lock_interruptible(&session->report_mutex)) 256 return -ERESTARTSYS; 257 258 /* Set up our wait, and send the report request to the device. */ 259 session->waiting_report_type = report_type & HIDP_DATA_RTYPE_MASK; 260 session->waiting_report_number = numbered_reports ? report_number : -1; 261 set_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 262 data[0] = report_number; 263 ret = hidp_send_ctrl_message(session, report_type, data, 1); 264 if (ret) 265 goto err; 266 267 /* Wait for the return of the report. The returned report 268 gets put in session->report_return. */ 269 while (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) && 270 !atomic_read(&session->terminate)) { 271 int res; 272 273 res = wait_event_interruptible_timeout(session->report_queue, 274 !test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) 275 || atomic_read(&session->terminate), 276 5*HZ); 277 if (res == 0) { 278 /* timeout */ 279 ret = -EIO; 280 goto err; 281 } 282 if (res < 0) { 283 /* signal */ 284 ret = -ERESTARTSYS; 285 goto err; 286 } 287 } 288 289 skb = session->report_return; 290 if (skb) { 291 len = skb->len < count ? skb->len : count; 292 memcpy(data, skb->data, len); 293 294 kfree_skb(skb); 295 session->report_return = NULL; 296 } else { 297 /* Device returned a HANDSHAKE, indicating protocol error. */ 298 len = -EIO; 299 } 300 301 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 302 mutex_unlock(&session->report_mutex); 303 304 return len; 305 306 err: 307 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 308 mutex_unlock(&session->report_mutex); 309 return ret; 310 } 311 312 static int hidp_set_raw_report(struct hid_device *hid, unsigned char reportnum, 313 unsigned char *data, size_t count, 314 unsigned char report_type) 315 { 316 struct hidp_session *session = hid->driver_data; 317 int ret; 318 319 switch (report_type) { 320 case HID_FEATURE_REPORT: 321 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE; 322 break; 323 case HID_INPUT_REPORT: 324 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_INPUT; 325 break; 326 case HID_OUTPUT_REPORT: 327 report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_OUPUT; 328 break; 329 default: 330 return -EINVAL; 331 } 332 333 if (mutex_lock_interruptible(&session->report_mutex)) 334 return -ERESTARTSYS; 335 336 /* Set up our wait, and send the report request to the device. */ 337 data[0] = reportnum; 338 set_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); 339 ret = hidp_send_ctrl_message(session, report_type, data, count); 340 if (ret) 341 goto err; 342 343 /* Wait for the ACK from the device. */ 344 while (test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags) && 345 !atomic_read(&session->terminate)) { 346 int res; 347 348 res = wait_event_interruptible_timeout(session->report_queue, 349 !test_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags) 350 || atomic_read(&session->terminate), 351 10*HZ); 352 if (res == 0) { 353 /* timeout */ 354 ret = -EIO; 355 goto err; 356 } 357 if (res < 0) { 358 /* signal */ 359 ret = -ERESTARTSYS; 360 goto err; 361 } 362 } 363 364 if (!session->output_report_success) { 365 ret = -EIO; 366 goto err; 367 } 368 369 ret = count; 370 371 err: 372 clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags); 373 mutex_unlock(&session->report_mutex); 374 return ret; 375 } 376 377 static int hidp_output_report(struct hid_device *hid, __u8 *data, size_t count) 378 { 379 struct hidp_session *session = hid->driver_data; 380 381 return hidp_send_intr_message(session, 382 HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT, 383 data, count); 384 } 385 386 static int hidp_raw_request(struct hid_device *hid, unsigned char reportnum, 387 __u8 *buf, size_t len, unsigned char rtype, 388 int reqtype) 389 { 390 switch (reqtype) { 391 case HID_REQ_GET_REPORT: 392 return hidp_get_raw_report(hid, reportnum, buf, len, rtype); 393 case HID_REQ_SET_REPORT: 394 return hidp_set_raw_report(hid, reportnum, buf, len, rtype); 395 default: 396 return -EIO; 397 } 398 } 399 400 static void hidp_idle_timeout(unsigned long arg) 401 { 402 struct hidp_session *session = (struct hidp_session *) arg; 403 404 hidp_session_terminate(session); 405 } 406 407 static void hidp_set_timer(struct hidp_session *session) 408 { 409 if (session->idle_to > 0) 410 mod_timer(&session->timer, jiffies + HZ * session->idle_to); 411 } 412 413 static void hidp_del_timer(struct hidp_session *session) 414 { 415 if (session->idle_to > 0) 416 del_timer(&session->timer); 417 } 418 419 static void hidp_process_report(struct hidp_session *session, 420 int type, const u8 *data, int len, int intr) 421 { 422 if (len > HID_MAX_BUFFER_SIZE) 423 len = HID_MAX_BUFFER_SIZE; 424 425 memcpy(session->input_buf, data, len); 426 hid_input_report(session->hid, type, session->input_buf, len, intr); 427 } 428 429 static void hidp_process_handshake(struct hidp_session *session, 430 unsigned char param) 431 { 432 BT_DBG("session %p param 0x%02x", session, param); 433 session->output_report_success = 0; /* default condition */ 434 435 switch (param) { 436 case HIDP_HSHK_SUCCESSFUL: 437 /* FIXME: Call into SET_ GET_ handlers here */ 438 session->output_report_success = 1; 439 break; 440 441 case HIDP_HSHK_NOT_READY: 442 case HIDP_HSHK_ERR_INVALID_REPORT_ID: 443 case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST: 444 case HIDP_HSHK_ERR_INVALID_PARAMETER: 445 if (test_and_clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags)) 446 wake_up_interruptible(&session->report_queue); 447 448 /* FIXME: Call into SET_ GET_ handlers here */ 449 break; 450 451 case HIDP_HSHK_ERR_UNKNOWN: 452 break; 453 454 case HIDP_HSHK_ERR_FATAL: 455 /* Device requests a reboot, as this is the only way this error 456 * can be recovered. */ 457 hidp_send_ctrl_message(session, 458 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0); 459 break; 460 461 default: 462 hidp_send_ctrl_message(session, 463 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 464 break; 465 } 466 467 /* Wake up the waiting thread. */ 468 if (test_and_clear_bit(HIDP_WAITING_FOR_SEND_ACK, &session->flags)) 469 wake_up_interruptible(&session->report_queue); 470 } 471 472 static void hidp_process_hid_control(struct hidp_session *session, 473 unsigned char param) 474 { 475 BT_DBG("session %p param 0x%02x", session, param); 476 477 if (param == HIDP_CTRL_VIRTUAL_CABLE_UNPLUG) { 478 /* Flush the transmit queues */ 479 skb_queue_purge(&session->ctrl_transmit); 480 skb_queue_purge(&session->intr_transmit); 481 482 hidp_session_terminate(session); 483 } 484 } 485 486 /* Returns true if the passed-in skb should be freed by the caller. */ 487 static int hidp_process_data(struct hidp_session *session, struct sk_buff *skb, 488 unsigned char param) 489 { 490 int done_with_skb = 1; 491 BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param); 492 493 switch (param) { 494 case HIDP_DATA_RTYPE_INPUT: 495 hidp_set_timer(session); 496 497 if (session->input) 498 hidp_input_report(session, skb); 499 500 if (session->hid) 501 hidp_process_report(session, HID_INPUT_REPORT, 502 skb->data, skb->len, 0); 503 break; 504 505 case HIDP_DATA_RTYPE_OTHER: 506 case HIDP_DATA_RTYPE_OUPUT: 507 case HIDP_DATA_RTYPE_FEATURE: 508 break; 509 510 default: 511 hidp_send_ctrl_message(session, 512 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 513 } 514 515 if (test_bit(HIDP_WAITING_FOR_RETURN, &session->flags) && 516 param == session->waiting_report_type) { 517 if (session->waiting_report_number < 0 || 518 session->waiting_report_number == skb->data[0]) { 519 /* hidp_get_raw_report() is waiting on this report. */ 520 session->report_return = skb; 521 done_with_skb = 0; 522 clear_bit(HIDP_WAITING_FOR_RETURN, &session->flags); 523 wake_up_interruptible(&session->report_queue); 524 } 525 } 526 527 return done_with_skb; 528 } 529 530 static void hidp_recv_ctrl_frame(struct hidp_session *session, 531 struct sk_buff *skb) 532 { 533 unsigned char hdr, type, param; 534 int free_skb = 1; 535 536 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 537 538 hdr = skb->data[0]; 539 skb_pull(skb, 1); 540 541 type = hdr & HIDP_HEADER_TRANS_MASK; 542 param = hdr & HIDP_HEADER_PARAM_MASK; 543 544 switch (type) { 545 case HIDP_TRANS_HANDSHAKE: 546 hidp_process_handshake(session, param); 547 break; 548 549 case HIDP_TRANS_HID_CONTROL: 550 hidp_process_hid_control(session, param); 551 break; 552 553 case HIDP_TRANS_DATA: 554 free_skb = hidp_process_data(session, skb, param); 555 break; 556 557 default: 558 hidp_send_ctrl_message(session, 559 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0); 560 break; 561 } 562 563 if (free_skb) 564 kfree_skb(skb); 565 } 566 567 static void hidp_recv_intr_frame(struct hidp_session *session, 568 struct sk_buff *skb) 569 { 570 unsigned char hdr; 571 572 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 573 574 hdr = skb->data[0]; 575 skb_pull(skb, 1); 576 577 if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) { 578 hidp_set_timer(session); 579 580 if (session->input) 581 hidp_input_report(session, skb); 582 583 if (session->hid) { 584 hidp_process_report(session, HID_INPUT_REPORT, 585 skb->data, skb->len, 1); 586 BT_DBG("report len %d", skb->len); 587 } 588 } else { 589 BT_DBG("Unsupported protocol header 0x%02x", hdr); 590 } 591 592 kfree_skb(skb); 593 } 594 595 static int hidp_send_frame(struct socket *sock, unsigned char *data, int len) 596 { 597 struct kvec iv = { data, len }; 598 struct msghdr msg; 599 600 BT_DBG("sock %p data %p len %d", sock, data, len); 601 602 if (!len) 603 return 0; 604 605 memset(&msg, 0, sizeof(msg)); 606 607 return kernel_sendmsg(sock, &msg, &iv, 1, len); 608 } 609 610 /* dequeue message from @transmit and send via @sock */ 611 static void hidp_process_transmit(struct hidp_session *session, 612 struct sk_buff_head *transmit, 613 struct socket *sock) 614 { 615 struct sk_buff *skb; 616 int ret; 617 618 BT_DBG("session %p", session); 619 620 while ((skb = skb_dequeue(transmit))) { 621 ret = hidp_send_frame(sock, skb->data, skb->len); 622 if (ret == -EAGAIN) { 623 skb_queue_head(transmit, skb); 624 break; 625 } else if (ret < 0) { 626 hidp_session_terminate(session); 627 kfree_skb(skb); 628 break; 629 } 630 631 hidp_set_timer(session); 632 kfree_skb(skb); 633 } 634 } 635 636 static int hidp_setup_input(struct hidp_session *session, 637 struct hidp_connadd_req *req) 638 { 639 struct input_dev *input; 640 int i; 641 642 input = input_allocate_device(); 643 if (!input) 644 return -ENOMEM; 645 646 session->input = input; 647 648 input_set_drvdata(input, session); 649 650 input->name = "Bluetooth HID Boot Protocol Device"; 651 652 input->id.bustype = BUS_BLUETOOTH; 653 input->id.vendor = req->vendor; 654 input->id.product = req->product; 655 input->id.version = req->version; 656 657 if (req->subclass & 0x40) { 658 set_bit(EV_KEY, input->evbit); 659 set_bit(EV_LED, input->evbit); 660 set_bit(EV_REP, input->evbit); 661 662 set_bit(LED_NUML, input->ledbit); 663 set_bit(LED_CAPSL, input->ledbit); 664 set_bit(LED_SCROLLL, input->ledbit); 665 set_bit(LED_COMPOSE, input->ledbit); 666 set_bit(LED_KANA, input->ledbit); 667 668 for (i = 0; i < sizeof(hidp_keycode); i++) 669 set_bit(hidp_keycode[i], input->keybit); 670 clear_bit(0, input->keybit); 671 } 672 673 if (req->subclass & 0x80) { 674 input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 675 input->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | 676 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); 677 input->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 678 input->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) | 679 BIT_MASK(BTN_EXTRA); 680 input->relbit[0] |= BIT_MASK(REL_WHEEL); 681 } 682 683 input->dev.parent = &session->conn->hcon->dev; 684 685 input->event = hidp_input_event; 686 687 return 0; 688 } 689 690 static int hidp_open(struct hid_device *hid) 691 { 692 return 0; 693 } 694 695 static void hidp_close(struct hid_device *hid) 696 { 697 } 698 699 static int hidp_parse(struct hid_device *hid) 700 { 701 struct hidp_session *session = hid->driver_data; 702 703 return hid_parse_report(session->hid, session->rd_data, 704 session->rd_size); 705 } 706 707 static int hidp_start(struct hid_device *hid) 708 { 709 return 0; 710 } 711 712 static void hidp_stop(struct hid_device *hid) 713 { 714 struct hidp_session *session = hid->driver_data; 715 716 skb_queue_purge(&session->ctrl_transmit); 717 skb_queue_purge(&session->intr_transmit); 718 719 hid->claimed = 0; 720 } 721 722 static struct hid_ll_driver hidp_hid_driver = { 723 .parse = hidp_parse, 724 .start = hidp_start, 725 .stop = hidp_stop, 726 .open = hidp_open, 727 .close = hidp_close, 728 .raw_request = hidp_raw_request, 729 .output_report = hidp_output_report, 730 }; 731 732 /* This function sets up the hid device. It does not add it 733 to the HID system. That is done in hidp_add_connection(). */ 734 static int hidp_setup_hid(struct hidp_session *session, 735 struct hidp_connadd_req *req) 736 { 737 struct hid_device *hid; 738 int err; 739 740 session->rd_data = memdup_user(req->rd_data, req->rd_size); 741 if (IS_ERR(session->rd_data)) 742 return PTR_ERR(session->rd_data); 743 744 session->rd_size = req->rd_size; 745 746 hid = hid_allocate_device(); 747 if (IS_ERR(hid)) { 748 err = PTR_ERR(hid); 749 goto fault; 750 } 751 752 session->hid = hid; 753 754 hid->driver_data = session; 755 756 hid->bus = BUS_BLUETOOTH; 757 hid->vendor = req->vendor; 758 hid->product = req->product; 759 hid->version = req->version; 760 hid->country = req->country; 761 762 strncpy(hid->name, req->name, sizeof(req->name) - 1); 763 764 snprintf(hid->phys, sizeof(hid->phys), "%pMR", 765 &l2cap_pi(session->ctrl_sock->sk)->chan->src); 766 767 /* NOTE: Some device modules depend on the dst address being stored in 768 * uniq. Please be aware of this before making changes to this behavior. 769 */ 770 snprintf(hid->uniq, sizeof(hid->uniq), "%pMR", 771 &l2cap_pi(session->ctrl_sock->sk)->chan->dst); 772 773 hid->dev.parent = &session->conn->hcon->dev; 774 hid->ll_driver = &hidp_hid_driver; 775 776 /* True if device is blacklisted in drivers/hid/hid-core.c */ 777 if (hid_ignore(hid)) { 778 hid_destroy_device(session->hid); 779 session->hid = NULL; 780 return -ENODEV; 781 } 782 783 return 0; 784 785 fault: 786 kfree(session->rd_data); 787 session->rd_data = NULL; 788 789 return err; 790 } 791 792 /* initialize session devices */ 793 static int hidp_session_dev_init(struct hidp_session *session, 794 struct hidp_connadd_req *req) 795 { 796 int ret; 797 798 if (req->rd_size > 0) { 799 ret = hidp_setup_hid(session, req); 800 if (ret && ret != -ENODEV) 801 return ret; 802 } 803 804 if (!session->hid) { 805 ret = hidp_setup_input(session, req); 806 if (ret < 0) 807 return ret; 808 } 809 810 return 0; 811 } 812 813 /* destroy session devices */ 814 static void hidp_session_dev_destroy(struct hidp_session *session) 815 { 816 if (session->hid) 817 put_device(&session->hid->dev); 818 else if (session->input) 819 input_put_device(session->input); 820 821 kfree(session->rd_data); 822 session->rd_data = NULL; 823 } 824 825 /* add HID/input devices to their underlying bus systems */ 826 static int hidp_session_dev_add(struct hidp_session *session) 827 { 828 int ret; 829 830 /* Both HID and input systems drop a ref-count when unregistering the 831 * device but they don't take a ref-count when registering them. Work 832 * around this by explicitly taking a refcount during registration 833 * which is dropped automatically by unregistering the devices. */ 834 835 if (session->hid) { 836 ret = hid_add_device(session->hid); 837 if (ret) 838 return ret; 839 get_device(&session->hid->dev); 840 } else if (session->input) { 841 ret = input_register_device(session->input); 842 if (ret) 843 return ret; 844 input_get_device(session->input); 845 } 846 847 return 0; 848 } 849 850 /* remove HID/input devices from their bus systems */ 851 static void hidp_session_dev_del(struct hidp_session *session) 852 { 853 if (session->hid) 854 hid_destroy_device(session->hid); 855 else if (session->input) 856 input_unregister_device(session->input); 857 } 858 859 /* 860 * Asynchronous device registration 861 * HID device drivers might want to perform I/O during initialization to 862 * detect device types. Therefore, call device registration in a separate 863 * worker so the HIDP thread can schedule I/O operations. 864 * Note that this must be called after the worker thread was initialized 865 * successfully. This will then add the devices and increase session state 866 * on success, otherwise it will terminate the session thread. 867 */ 868 static void hidp_session_dev_work(struct work_struct *work) 869 { 870 struct hidp_session *session = container_of(work, 871 struct hidp_session, 872 dev_init); 873 int ret; 874 875 ret = hidp_session_dev_add(session); 876 if (!ret) 877 atomic_inc(&session->state); 878 else 879 hidp_session_terminate(session); 880 } 881 882 /* 883 * Create new session object 884 * Allocate session object, initialize static fields, copy input data into the 885 * object and take a reference to all sub-objects. 886 * This returns 0 on success and puts a pointer to the new session object in 887 * \out. Otherwise, an error code is returned. 888 * The new session object has an initial ref-count of 1. 889 */ 890 static int hidp_session_new(struct hidp_session **out, const bdaddr_t *bdaddr, 891 struct socket *ctrl_sock, 892 struct socket *intr_sock, 893 struct hidp_connadd_req *req, 894 struct l2cap_conn *conn) 895 { 896 struct hidp_session *session; 897 int ret; 898 struct bt_sock *ctrl, *intr; 899 900 ctrl = bt_sk(ctrl_sock->sk); 901 intr = bt_sk(intr_sock->sk); 902 903 session = kzalloc(sizeof(*session), GFP_KERNEL); 904 if (!session) 905 return -ENOMEM; 906 907 /* object and runtime management */ 908 kref_init(&session->ref); 909 atomic_set(&session->state, HIDP_SESSION_IDLING); 910 init_waitqueue_head(&session->state_queue); 911 session->flags = req->flags & BIT(HIDP_BLUETOOTH_VENDOR_ID); 912 913 /* connection management */ 914 bacpy(&session->bdaddr, bdaddr); 915 session->conn = l2cap_conn_get(conn); 916 session->user.probe = hidp_session_probe; 917 session->user.remove = hidp_session_remove; 918 INIT_LIST_HEAD(&session->user.list); 919 session->ctrl_sock = ctrl_sock; 920 session->intr_sock = intr_sock; 921 skb_queue_head_init(&session->ctrl_transmit); 922 skb_queue_head_init(&session->intr_transmit); 923 session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl)->chan->omtu, 924 l2cap_pi(ctrl)->chan->imtu); 925 session->intr_mtu = min_t(uint, l2cap_pi(intr)->chan->omtu, 926 l2cap_pi(intr)->chan->imtu); 927 session->idle_to = req->idle_to; 928 929 /* device management */ 930 INIT_WORK(&session->dev_init, hidp_session_dev_work); 931 setup_timer(&session->timer, hidp_idle_timeout, 932 (unsigned long)session); 933 934 /* session data */ 935 mutex_init(&session->report_mutex); 936 init_waitqueue_head(&session->report_queue); 937 938 ret = hidp_session_dev_init(session, req); 939 if (ret) 940 goto err_free; 941 942 get_file(session->intr_sock->file); 943 get_file(session->ctrl_sock->file); 944 *out = session; 945 return 0; 946 947 err_free: 948 l2cap_conn_put(session->conn); 949 kfree(session); 950 return ret; 951 } 952 953 /* increase ref-count of the given session by one */ 954 static void hidp_session_get(struct hidp_session *session) 955 { 956 kref_get(&session->ref); 957 } 958 959 /* release callback */ 960 static void session_free(struct kref *ref) 961 { 962 struct hidp_session *session = container_of(ref, struct hidp_session, 963 ref); 964 965 hidp_session_dev_destroy(session); 966 skb_queue_purge(&session->ctrl_transmit); 967 skb_queue_purge(&session->intr_transmit); 968 fput(session->intr_sock->file); 969 fput(session->ctrl_sock->file); 970 l2cap_conn_put(session->conn); 971 kfree(session); 972 } 973 974 /* decrease ref-count of the given session by one */ 975 static void hidp_session_put(struct hidp_session *session) 976 { 977 kref_put(&session->ref, session_free); 978 } 979 980 /* 981 * Search the list of active sessions for a session with target address 982 * \bdaddr. You must hold at least a read-lock on \hidp_session_sem. As long as 983 * you do not release this lock, the session objects cannot vanish and you can 984 * safely take a reference to the session yourself. 985 */ 986 static struct hidp_session *__hidp_session_find(const bdaddr_t *bdaddr) 987 { 988 struct hidp_session *session; 989 990 list_for_each_entry(session, &hidp_session_list, list) { 991 if (!bacmp(bdaddr, &session->bdaddr)) 992 return session; 993 } 994 995 return NULL; 996 } 997 998 /* 999 * Same as __hidp_session_find() but no locks must be held. This also takes a 1000 * reference of the returned session (if non-NULL) so you must drop this 1001 * reference if you no longer use the object. 1002 */ 1003 static struct hidp_session *hidp_session_find(const bdaddr_t *bdaddr) 1004 { 1005 struct hidp_session *session; 1006 1007 down_read(&hidp_session_sem); 1008 1009 session = __hidp_session_find(bdaddr); 1010 if (session) 1011 hidp_session_get(session); 1012 1013 up_read(&hidp_session_sem); 1014 1015 return session; 1016 } 1017 1018 /* 1019 * Start session synchronously 1020 * This starts a session thread and waits until initialization 1021 * is done or returns an error if it couldn't be started. 1022 * If this returns 0 the session thread is up and running. You must call 1023 * hipd_session_stop_sync() before deleting any runtime resources. 1024 */ 1025 static int hidp_session_start_sync(struct hidp_session *session) 1026 { 1027 unsigned int vendor, product; 1028 1029 if (session->hid) { 1030 vendor = session->hid->vendor; 1031 product = session->hid->product; 1032 } else if (session->input) { 1033 vendor = session->input->id.vendor; 1034 product = session->input->id.product; 1035 } else { 1036 vendor = 0x0000; 1037 product = 0x0000; 1038 } 1039 1040 session->task = kthread_run(hidp_session_thread, session, 1041 "khidpd_%04x%04x", vendor, product); 1042 if (IS_ERR(session->task)) 1043 return PTR_ERR(session->task); 1044 1045 while (atomic_read(&session->state) <= HIDP_SESSION_IDLING) 1046 wait_event(session->state_queue, 1047 atomic_read(&session->state) > HIDP_SESSION_IDLING); 1048 1049 return 0; 1050 } 1051 1052 /* 1053 * Terminate session thread 1054 * Wake up session thread and notify it to stop. This is asynchronous and 1055 * returns immediately. Call this whenever a runtime error occurs and you want 1056 * the session to stop. 1057 * Note: wake_up_process() performs any necessary memory-barriers for us. 1058 */ 1059 static void hidp_session_terminate(struct hidp_session *session) 1060 { 1061 atomic_inc(&session->terminate); 1062 wake_up_process(session->task); 1063 } 1064 1065 /* 1066 * Probe HIDP session 1067 * This is called from the l2cap_conn core when our l2cap_user object is bound 1068 * to the hci-connection. We get the session via the \user object and can now 1069 * start the session thread, link it into the global session list and 1070 * schedule HID/input device registration. 1071 * The global session-list owns its own reference to the session object so you 1072 * can drop your own reference after registering the l2cap_user object. 1073 */ 1074 static int hidp_session_probe(struct l2cap_conn *conn, 1075 struct l2cap_user *user) 1076 { 1077 struct hidp_session *session = container_of(user, 1078 struct hidp_session, 1079 user); 1080 struct hidp_session *s; 1081 int ret; 1082 1083 down_write(&hidp_session_sem); 1084 1085 /* check that no other session for this device exists */ 1086 s = __hidp_session_find(&session->bdaddr); 1087 if (s) { 1088 ret = -EEXIST; 1089 goto out_unlock; 1090 } 1091 1092 if (session->input) { 1093 ret = hidp_session_dev_add(session); 1094 if (ret) 1095 goto out_unlock; 1096 } 1097 1098 ret = hidp_session_start_sync(session); 1099 if (ret) 1100 goto out_del; 1101 1102 /* HID device registration is async to allow I/O during probe */ 1103 if (session->input) 1104 atomic_inc(&session->state); 1105 else 1106 schedule_work(&session->dev_init); 1107 1108 hidp_session_get(session); 1109 list_add(&session->list, &hidp_session_list); 1110 ret = 0; 1111 goto out_unlock; 1112 1113 out_del: 1114 if (session->input) 1115 hidp_session_dev_del(session); 1116 out_unlock: 1117 up_write(&hidp_session_sem); 1118 return ret; 1119 } 1120 1121 /* 1122 * Remove HIDP session 1123 * Called from the l2cap_conn core when either we explicitly unregistered 1124 * the l2cap_user object or if the underlying connection is shut down. 1125 * We signal the hidp-session thread to shut down, unregister the HID/input 1126 * devices and unlink the session from the global list. 1127 * This drops the reference to the session that is owned by the global 1128 * session-list. 1129 * Note: We _must_ not synchronosly wait for the session-thread to shut down. 1130 * This is, because the session-thread might be waiting for an HCI lock that is 1131 * held while we are called. Therefore, we only unregister the devices and 1132 * notify the session-thread to terminate. The thread itself owns a reference 1133 * to the session object so it can safely shut down. 1134 */ 1135 static void hidp_session_remove(struct l2cap_conn *conn, 1136 struct l2cap_user *user) 1137 { 1138 struct hidp_session *session = container_of(user, 1139 struct hidp_session, 1140 user); 1141 1142 down_write(&hidp_session_sem); 1143 1144 hidp_session_terminate(session); 1145 1146 cancel_work_sync(&session->dev_init); 1147 if (session->input || 1148 atomic_read(&session->state) > HIDP_SESSION_PREPARING) 1149 hidp_session_dev_del(session); 1150 1151 list_del(&session->list); 1152 1153 up_write(&hidp_session_sem); 1154 1155 hidp_session_put(session); 1156 } 1157 1158 /* 1159 * Session Worker 1160 * This performs the actual main-loop of the HIDP worker. We first check 1161 * whether the underlying connection is still alive, then parse all pending 1162 * messages and finally send all outstanding messages. 1163 */ 1164 static void hidp_session_run(struct hidp_session *session) 1165 { 1166 struct sock *ctrl_sk = session->ctrl_sock->sk; 1167 struct sock *intr_sk = session->intr_sock->sk; 1168 struct sk_buff *skb; 1169 1170 for (;;) { 1171 /* 1172 * This thread can be woken up two ways: 1173 * - You call hidp_session_terminate() which sets the 1174 * session->terminate flag and wakes this thread up. 1175 * - Via modifying the socket state of ctrl/intr_sock. This 1176 * thread is woken up by ->sk_state_changed(). 1177 * 1178 * Note: set_current_state() performs any necessary 1179 * memory-barriers for us. 1180 */ 1181 set_current_state(TASK_INTERRUPTIBLE); 1182 1183 if (atomic_read(&session->terminate)) 1184 break; 1185 1186 if (ctrl_sk->sk_state != BT_CONNECTED || 1187 intr_sk->sk_state != BT_CONNECTED) 1188 break; 1189 1190 /* parse incoming intr-skbs */ 1191 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) { 1192 skb_orphan(skb); 1193 if (!skb_linearize(skb)) 1194 hidp_recv_intr_frame(session, skb); 1195 else 1196 kfree_skb(skb); 1197 } 1198 1199 /* send pending intr-skbs */ 1200 hidp_process_transmit(session, &session->intr_transmit, 1201 session->intr_sock); 1202 1203 /* parse incoming ctrl-skbs */ 1204 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) { 1205 skb_orphan(skb); 1206 if (!skb_linearize(skb)) 1207 hidp_recv_ctrl_frame(session, skb); 1208 else 1209 kfree_skb(skb); 1210 } 1211 1212 /* send pending ctrl-skbs */ 1213 hidp_process_transmit(session, &session->ctrl_transmit, 1214 session->ctrl_sock); 1215 1216 schedule(); 1217 } 1218 1219 atomic_inc(&session->terminate); 1220 set_current_state(TASK_RUNNING); 1221 } 1222 1223 /* 1224 * HIDP session thread 1225 * This thread runs the I/O for a single HIDP session. Startup is synchronous 1226 * which allows us to take references to ourself here instead of doing that in 1227 * the caller. 1228 * When we are ready to run we notify the caller and call hidp_session_run(). 1229 */ 1230 static int hidp_session_thread(void *arg) 1231 { 1232 struct hidp_session *session = arg; 1233 wait_queue_t ctrl_wait, intr_wait; 1234 1235 BT_DBG("session %p", session); 1236 1237 /* initialize runtime environment */ 1238 hidp_session_get(session); 1239 __module_get(THIS_MODULE); 1240 set_user_nice(current, -15); 1241 hidp_set_timer(session); 1242 1243 init_waitqueue_entry(&ctrl_wait, current); 1244 init_waitqueue_entry(&intr_wait, current); 1245 add_wait_queue(sk_sleep(session->ctrl_sock->sk), &ctrl_wait); 1246 add_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait); 1247 /* This memory barrier is paired with wq_has_sleeper(). See 1248 * sock_poll_wait() for more information why this is needed. */ 1249 smp_mb(); 1250 1251 /* notify synchronous startup that we're ready */ 1252 atomic_inc(&session->state); 1253 wake_up(&session->state_queue); 1254 1255 /* run session */ 1256 hidp_session_run(session); 1257 1258 /* cleanup runtime environment */ 1259 remove_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait); 1260 remove_wait_queue(sk_sleep(session->intr_sock->sk), &ctrl_wait); 1261 wake_up_interruptible(&session->report_queue); 1262 hidp_del_timer(session); 1263 1264 /* 1265 * If we stopped ourself due to any internal signal, we should try to 1266 * unregister our own session here to avoid having it linger until the 1267 * parent l2cap_conn dies or user-space cleans it up. 1268 * This does not deadlock as we don't do any synchronous shutdown. 1269 * Instead, this call has the same semantics as if user-space tried to 1270 * delete the session. 1271 */ 1272 l2cap_unregister_user(session->conn, &session->user); 1273 hidp_session_put(session); 1274 1275 module_put_and_exit(0); 1276 return 0; 1277 } 1278 1279 static int hidp_verify_sockets(struct socket *ctrl_sock, 1280 struct socket *intr_sock) 1281 { 1282 struct l2cap_chan *ctrl_chan, *intr_chan; 1283 struct bt_sock *ctrl, *intr; 1284 struct hidp_session *session; 1285 1286 if (!l2cap_is_socket(ctrl_sock) || !l2cap_is_socket(intr_sock)) 1287 return -EINVAL; 1288 1289 ctrl_chan = l2cap_pi(ctrl_sock->sk)->chan; 1290 intr_chan = l2cap_pi(intr_sock->sk)->chan; 1291 1292 if (bacmp(&ctrl_chan->src, &intr_chan->src) || 1293 bacmp(&ctrl_chan->dst, &intr_chan->dst)) 1294 return -ENOTUNIQ; 1295 1296 ctrl = bt_sk(ctrl_sock->sk); 1297 intr = bt_sk(intr_sock->sk); 1298 1299 if (ctrl->sk.sk_state != BT_CONNECTED || 1300 intr->sk.sk_state != BT_CONNECTED) 1301 return -EBADFD; 1302 1303 /* early session check, we check again during session registration */ 1304 session = hidp_session_find(&ctrl_chan->dst); 1305 if (session) { 1306 hidp_session_put(session); 1307 return -EEXIST; 1308 } 1309 1310 return 0; 1311 } 1312 1313 int hidp_connection_add(struct hidp_connadd_req *req, 1314 struct socket *ctrl_sock, 1315 struct socket *intr_sock) 1316 { 1317 u32 valid_flags = BIT(HIDP_VIRTUAL_CABLE_UNPLUG) | 1318 BIT(HIDP_BOOT_PROTOCOL_MODE); 1319 struct hidp_session *session; 1320 struct l2cap_conn *conn; 1321 struct l2cap_chan *chan; 1322 int ret; 1323 1324 ret = hidp_verify_sockets(ctrl_sock, intr_sock); 1325 if (ret) 1326 return ret; 1327 1328 if (req->flags & ~valid_flags) 1329 return -EINVAL; 1330 1331 chan = l2cap_pi(ctrl_sock->sk)->chan; 1332 conn = NULL; 1333 l2cap_chan_lock(chan); 1334 if (chan->conn) 1335 conn = l2cap_conn_get(chan->conn); 1336 l2cap_chan_unlock(chan); 1337 1338 if (!conn) 1339 return -EBADFD; 1340 1341 ret = hidp_session_new(&session, &chan->dst, ctrl_sock, 1342 intr_sock, req, conn); 1343 if (ret) 1344 goto out_conn; 1345 1346 ret = l2cap_register_user(conn, &session->user); 1347 if (ret) 1348 goto out_session; 1349 1350 ret = 0; 1351 1352 out_session: 1353 hidp_session_put(session); 1354 out_conn: 1355 l2cap_conn_put(conn); 1356 return ret; 1357 } 1358 1359 int hidp_connection_del(struct hidp_conndel_req *req) 1360 { 1361 u32 valid_flags = BIT(HIDP_VIRTUAL_CABLE_UNPLUG); 1362 struct hidp_session *session; 1363 1364 if (req->flags & ~valid_flags) 1365 return -EINVAL; 1366 1367 session = hidp_session_find(&req->bdaddr); 1368 if (!session) 1369 return -ENOENT; 1370 1371 if (req->flags & BIT(HIDP_VIRTUAL_CABLE_UNPLUG)) 1372 hidp_send_ctrl_message(session, 1373 HIDP_TRANS_HID_CONTROL | 1374 HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, 1375 NULL, 0); 1376 else 1377 l2cap_unregister_user(session->conn, &session->user); 1378 1379 hidp_session_put(session); 1380 1381 return 0; 1382 } 1383 1384 int hidp_get_connlist(struct hidp_connlist_req *req) 1385 { 1386 struct hidp_session *session; 1387 int err = 0, n = 0; 1388 1389 BT_DBG(""); 1390 1391 down_read(&hidp_session_sem); 1392 1393 list_for_each_entry(session, &hidp_session_list, list) { 1394 struct hidp_conninfo ci; 1395 1396 hidp_copy_session(session, &ci); 1397 1398 if (copy_to_user(req->ci, &ci, sizeof(ci))) { 1399 err = -EFAULT; 1400 break; 1401 } 1402 1403 if (++n >= req->cnum) 1404 break; 1405 1406 req->ci++; 1407 } 1408 req->cnum = n; 1409 1410 up_read(&hidp_session_sem); 1411 return err; 1412 } 1413 1414 int hidp_get_conninfo(struct hidp_conninfo *ci) 1415 { 1416 struct hidp_session *session; 1417 1418 session = hidp_session_find(&ci->bdaddr); 1419 if (session) { 1420 hidp_copy_session(session, ci); 1421 hidp_session_put(session); 1422 } 1423 1424 return session ? 0 : -ENOENT; 1425 } 1426 1427 static int __init hidp_init(void) 1428 { 1429 BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION); 1430 1431 return hidp_init_sockets(); 1432 } 1433 1434 static void __exit hidp_exit(void) 1435 { 1436 hidp_cleanup_sockets(); 1437 } 1438 1439 module_init(hidp_init); 1440 module_exit(hidp_exit); 1441 1442 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 1443 MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>"); 1444 MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION); 1445 MODULE_VERSION(VERSION); 1446 MODULE_LICENSE("GPL"); 1447 MODULE_ALIAS("bt-proto-6"); 1448