core.c revision b03efcfb2180289718991bb984044ce6c5b7d1b0
1/* 2 HIDP implementation for Linux Bluetooth stack (BlueZ). 3 Copyright (C) 2003-2004 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/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/init.h> 38#include <linux/wait.h> 39#include <net/sock.h> 40 41#include <linux/input.h> 42 43#include <net/bluetooth/bluetooth.h> 44#include <net/bluetooth/l2cap.h> 45 46#include "hidp.h" 47 48#ifndef CONFIG_BT_HIDP_DEBUG 49#undef BT_DBG 50#define BT_DBG(D...) 51#endif 52 53#define VERSION "1.1" 54 55static DECLARE_RWSEM(hidp_session_sem); 56static LIST_HEAD(hidp_session_list); 57 58static unsigned char hidp_keycode[256] = { 59 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38, 60 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3, 61 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26, 62 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64, 63 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106, 64 105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 65 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190, 66 191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113, 67 115,114, 0, 0, 0,121, 0, 89, 93,124, 92, 94, 95, 0, 0, 0, 68 122,123, 90, 91, 85, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 69 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 70 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 71 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 72 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 73 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113, 74 150,158,159,128,136,177,178,176,142,152,173,140 75}; 76 77static unsigned char hidp_mkeyspat[] = { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 }; 78 79static struct hidp_session *__hidp_get_session(bdaddr_t *bdaddr) 80{ 81 struct hidp_session *session; 82 struct list_head *p; 83 84 BT_DBG(""); 85 86 list_for_each(p, &hidp_session_list) { 87 session = list_entry(p, struct hidp_session, list); 88 if (!bacmp(bdaddr, &session->bdaddr)) 89 return session; 90 } 91 return NULL; 92} 93 94static void __hidp_link_session(struct hidp_session *session) 95{ 96 __module_get(THIS_MODULE); 97 list_add(&session->list, &hidp_session_list); 98} 99 100static void __hidp_unlink_session(struct hidp_session *session) 101{ 102 list_del(&session->list); 103 module_put(THIS_MODULE); 104} 105 106static void __hidp_copy_session(struct hidp_session *session, struct hidp_conninfo *ci) 107{ 108 bacpy(&ci->bdaddr, &session->bdaddr); 109 110 ci->flags = session->flags; 111 ci->state = session->state; 112 113 ci->vendor = 0x0000; 114 ci->product = 0x0000; 115 ci->version = 0x0000; 116 memset(ci->name, 0, 128); 117 118 if (session->input) { 119 ci->vendor = session->input->id.vendor; 120 ci->product = session->input->id.product; 121 ci->version = session->input->id.version; 122 if (session->input->name) 123 strncpy(ci->name, session->input->name, 128); 124 else 125 strncpy(ci->name, "HID Boot Device", 128); 126 } 127} 128 129static int hidp_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) 130{ 131 struct hidp_session *session = dev->private; 132 struct sk_buff *skb; 133 unsigned char newleds; 134 135 BT_DBG("input %p type %d code %d value %d", dev, type, code, value); 136 137 if (type != EV_LED) 138 return -1; 139 140 newleds = (!!test_bit(LED_KANA, dev->led) << 3) | 141 (!!test_bit(LED_COMPOSE, dev->led) << 3) | 142 (!!test_bit(LED_SCROLLL, dev->led) << 2) | 143 (!!test_bit(LED_CAPSL, dev->led) << 1) | 144 (!!test_bit(LED_NUML, dev->led)); 145 146 if (session->leds == newleds) 147 return 0; 148 149 session->leds = newleds; 150 151 if (!(skb = alloc_skb(3, GFP_ATOMIC))) { 152 BT_ERR("Can't allocate memory for new frame"); 153 return -ENOMEM; 154 } 155 156 *skb_put(skb, 1) = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT; 157 *skb_put(skb, 1) = 0x01; 158 *skb_put(skb, 1) = newleds; 159 160 skb_queue_tail(&session->intr_transmit, skb); 161 162 hidp_schedule(session); 163 164 return 0; 165} 166 167static void hidp_input_report(struct hidp_session *session, struct sk_buff *skb) 168{ 169 struct input_dev *dev = session->input; 170 unsigned char *keys = session->keys; 171 unsigned char *udata = skb->data + 1; 172 signed char *sdata = skb->data + 1; 173 int i, size = skb->len - 1; 174 175 switch (skb->data[0]) { 176 case 0x01: /* Keyboard report */ 177 for (i = 0; i < 8; i++) 178 input_report_key(dev, hidp_keycode[i + 224], (udata[0] >> i) & 1); 179 180 /* If all the key codes have been set to 0x01, it means 181 * too many keys were pressed at the same time. */ 182 if (!memcmp(udata + 2, hidp_mkeyspat, 6)) 183 break; 184 185 for (i = 2; i < 8; i++) { 186 if (keys[i] > 3 && memscan(udata + 2, keys[i], 6) == udata + 8) { 187 if (hidp_keycode[keys[i]]) 188 input_report_key(dev, hidp_keycode[keys[i]], 0); 189 else 190 BT_ERR("Unknown key (scancode %#x) released.", keys[i]); 191 } 192 193 if (udata[i] > 3 && memscan(keys + 2, udata[i], 6) == keys + 8) { 194 if (hidp_keycode[udata[i]]) 195 input_report_key(dev, hidp_keycode[udata[i]], 1); 196 else 197 BT_ERR("Unknown key (scancode %#x) pressed.", udata[i]); 198 } 199 } 200 201 memcpy(keys, udata, 8); 202 break; 203 204 case 0x02: /* Mouse report */ 205 input_report_key(dev, BTN_LEFT, sdata[0] & 0x01); 206 input_report_key(dev, BTN_RIGHT, sdata[0] & 0x02); 207 input_report_key(dev, BTN_MIDDLE, sdata[0] & 0x04); 208 input_report_key(dev, BTN_SIDE, sdata[0] & 0x08); 209 input_report_key(dev, BTN_EXTRA, sdata[0] & 0x10); 210 211 input_report_rel(dev, REL_X, sdata[1]); 212 input_report_rel(dev, REL_Y, sdata[2]); 213 214 if (size > 3) 215 input_report_rel(dev, REL_WHEEL, sdata[3]); 216 break; 217 } 218 219 input_sync(dev); 220} 221 222static void hidp_idle_timeout(unsigned long arg) 223{ 224 struct hidp_session *session = (struct hidp_session *) arg; 225 226 atomic_inc(&session->terminate); 227 hidp_schedule(session); 228} 229 230static inline void hidp_set_timer(struct hidp_session *session) 231{ 232 if (session->idle_to > 0) 233 mod_timer(&session->timer, jiffies + HZ * session->idle_to); 234} 235 236static inline void hidp_del_timer(struct hidp_session *session) 237{ 238 if (session->idle_to > 0) 239 del_timer(&session->timer); 240} 241 242static int __hidp_send_ctrl_message(struct hidp_session *session, 243 unsigned char hdr, unsigned char *data, int size) 244{ 245 struct sk_buff *skb; 246 247 BT_DBG("session %p data %p size %d", session, data, size); 248 249 if (!(skb = alloc_skb(size + 1, GFP_ATOMIC))) { 250 BT_ERR("Can't allocate memory for new frame"); 251 return -ENOMEM; 252 } 253 254 *skb_put(skb, 1) = hdr; 255 if (data && size > 0) 256 memcpy(skb_put(skb, size), data, size); 257 258 skb_queue_tail(&session->ctrl_transmit, skb); 259 260 return 0; 261} 262 263static int inline hidp_send_ctrl_message(struct hidp_session *session, 264 unsigned char hdr, unsigned char *data, int size) 265{ 266 int err; 267 268 err = __hidp_send_ctrl_message(session, hdr, data, size); 269 270 hidp_schedule(session); 271 272 return err; 273} 274 275static inline void hidp_process_handshake(struct hidp_session *session, unsigned char param) 276{ 277 BT_DBG("session %p param 0x%02x", session, param); 278 279 switch (param) { 280 case HIDP_HSHK_SUCCESSFUL: 281 /* FIXME: Call into SET_ GET_ handlers here */ 282 break; 283 284 case HIDP_HSHK_NOT_READY: 285 case HIDP_HSHK_ERR_INVALID_REPORT_ID: 286 case HIDP_HSHK_ERR_UNSUPPORTED_REQUEST: 287 case HIDP_HSHK_ERR_INVALID_PARAMETER: 288 /* FIXME: Call into SET_ GET_ handlers here */ 289 break; 290 291 case HIDP_HSHK_ERR_UNKNOWN: 292 break; 293 294 case HIDP_HSHK_ERR_FATAL: 295 /* Device requests a reboot, as this is the only way this error 296 * can be recovered. */ 297 __hidp_send_ctrl_message(session, 298 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_SOFT_RESET, NULL, 0); 299 break; 300 301 default: 302 __hidp_send_ctrl_message(session, 303 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 304 break; 305 } 306} 307 308static inline void hidp_process_hid_control(struct hidp_session *session, unsigned char param) 309{ 310 BT_DBG("session %p param 0x%02x", session, param); 311 312 switch (param) { 313 case HIDP_CTRL_NOP: 314 break; 315 316 case HIDP_CTRL_VIRTUAL_CABLE_UNPLUG: 317 /* Flush the transmit queues */ 318 skb_queue_purge(&session->ctrl_transmit); 319 skb_queue_purge(&session->intr_transmit); 320 321 /* Kill session thread */ 322 atomic_inc(&session->terminate); 323 break; 324 325 case HIDP_CTRL_HARD_RESET: 326 case HIDP_CTRL_SOFT_RESET: 327 case HIDP_CTRL_SUSPEND: 328 case HIDP_CTRL_EXIT_SUSPEND: 329 /* FIXME: We have to parse these and return no error */ 330 break; 331 332 default: 333 __hidp_send_ctrl_message(session, 334 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 335 break; 336 } 337} 338 339static inline void hidp_process_data(struct hidp_session *session, struct sk_buff *skb, unsigned char param) 340{ 341 BT_DBG("session %p skb %p len %d param 0x%02x", session, skb, skb->len, param); 342 343 switch (param) { 344 case HIDP_DATA_RTYPE_INPUT: 345 hidp_set_timer(session); 346 347 if (session->input) 348 hidp_input_report(session, skb); 349 break; 350 351 case HIDP_DATA_RTYPE_OTHER: 352 case HIDP_DATA_RTYPE_OUPUT: 353 case HIDP_DATA_RTYPE_FEATURE: 354 break; 355 356 default: 357 __hidp_send_ctrl_message(session, 358 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_INVALID_PARAMETER, NULL, 0); 359 } 360} 361 362static inline void hidp_recv_ctrl_frame(struct hidp_session *session, struct sk_buff *skb) 363{ 364 unsigned char hdr, type, param; 365 366 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 367 368 hdr = skb->data[0]; 369 skb_pull(skb, 1); 370 371 type = hdr & HIDP_HEADER_TRANS_MASK; 372 param = hdr & HIDP_HEADER_PARAM_MASK; 373 374 switch (type) { 375 case HIDP_TRANS_HANDSHAKE: 376 hidp_process_handshake(session, param); 377 break; 378 379 case HIDP_TRANS_HID_CONTROL: 380 hidp_process_hid_control(session, param); 381 break; 382 383 case HIDP_TRANS_DATA: 384 hidp_process_data(session, skb, param); 385 break; 386 387 default: 388 __hidp_send_ctrl_message(session, 389 HIDP_TRANS_HANDSHAKE | HIDP_HSHK_ERR_UNSUPPORTED_REQUEST, NULL, 0); 390 break; 391 } 392 393 kfree_skb(skb); 394} 395 396static inline void hidp_recv_intr_frame(struct hidp_session *session, struct sk_buff *skb) 397{ 398 unsigned char hdr; 399 400 BT_DBG("session %p skb %p len %d", session, skb, skb->len); 401 402 hdr = skb->data[0]; 403 skb_pull(skb, 1); 404 405 if (hdr == (HIDP_TRANS_DATA | HIDP_DATA_RTYPE_INPUT)) { 406 hidp_set_timer(session); 407 if (session->input) 408 hidp_input_report(session, skb); 409 } else { 410 BT_DBG("Unsupported protocol header 0x%02x", hdr); 411 } 412 413 kfree_skb(skb); 414} 415 416static int hidp_send_frame(struct socket *sock, unsigned char *data, int len) 417{ 418 struct kvec iv = { data, len }; 419 struct msghdr msg; 420 421 BT_DBG("sock %p data %p len %d", sock, data, len); 422 423 if (!len) 424 return 0; 425 426 memset(&msg, 0, sizeof(msg)); 427 428 return kernel_sendmsg(sock, &msg, &iv, 1, len); 429} 430 431static void hidp_process_transmit(struct hidp_session *session) 432{ 433 struct sk_buff *skb; 434 435 BT_DBG("session %p", session); 436 437 while ((skb = skb_dequeue(&session->ctrl_transmit))) { 438 if (hidp_send_frame(session->ctrl_sock, skb->data, skb->len) < 0) { 439 skb_queue_head(&session->ctrl_transmit, skb); 440 break; 441 } 442 443 hidp_set_timer(session); 444 kfree_skb(skb); 445 } 446 447 while ((skb = skb_dequeue(&session->intr_transmit))) { 448 if (hidp_send_frame(session->intr_sock, skb->data, skb->len) < 0) { 449 skb_queue_head(&session->intr_transmit, skb); 450 break; 451 } 452 453 hidp_set_timer(session); 454 kfree_skb(skb); 455 } 456} 457 458static int hidp_session(void *arg) 459{ 460 struct hidp_session *session = arg; 461 struct sock *ctrl_sk = session->ctrl_sock->sk; 462 struct sock *intr_sk = session->intr_sock->sk; 463 struct sk_buff *skb; 464 int vendor = 0x0000, product = 0x0000; 465 wait_queue_t ctrl_wait, intr_wait; 466 467 BT_DBG("session %p", session); 468 469 if (session->input) { 470 vendor = session->input->id.vendor; 471 product = session->input->id.product; 472 } 473 474 daemonize("khidpd_%04x%04x", vendor, product); 475 set_user_nice(current, -15); 476 current->flags |= PF_NOFREEZE; 477 478 init_waitqueue_entry(&ctrl_wait, current); 479 init_waitqueue_entry(&intr_wait, current); 480 add_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait); 481 add_wait_queue(intr_sk->sk_sleep, &intr_wait); 482 while (!atomic_read(&session->terminate)) { 483 set_current_state(TASK_INTERRUPTIBLE); 484 485 if (ctrl_sk->sk_state != BT_CONNECTED || intr_sk->sk_state != BT_CONNECTED) 486 break; 487 488 while ((skb = skb_dequeue(&ctrl_sk->sk_receive_queue))) { 489 skb_orphan(skb); 490 hidp_recv_ctrl_frame(session, skb); 491 } 492 493 while ((skb = skb_dequeue(&intr_sk->sk_receive_queue))) { 494 skb_orphan(skb); 495 hidp_recv_intr_frame(session, skb); 496 } 497 498 hidp_process_transmit(session); 499 500 schedule(); 501 } 502 set_current_state(TASK_RUNNING); 503 remove_wait_queue(intr_sk->sk_sleep, &intr_wait); 504 remove_wait_queue(ctrl_sk->sk_sleep, &ctrl_wait); 505 506 down_write(&hidp_session_sem); 507 508 hidp_del_timer(session); 509 510 if (intr_sk->sk_state != BT_CONNECTED) 511 wait_event_timeout(*(ctrl_sk->sk_sleep), (ctrl_sk->sk_state == BT_CLOSED), HZ); 512 513 fput(session->ctrl_sock->file); 514 515 wait_event_timeout(*(intr_sk->sk_sleep), (intr_sk->sk_state == BT_CLOSED), HZ); 516 517 fput(session->intr_sock->file); 518 519 __hidp_unlink_session(session); 520 521 if (session->input) { 522 input_unregister_device(session->input); 523 kfree(session->input); 524 } 525 526 up_write(&hidp_session_sem); 527 528 kfree(session); 529 return 0; 530} 531 532static inline void hidp_setup_input(struct hidp_session *session, struct hidp_connadd_req *req) 533{ 534 struct input_dev *input = session->input; 535 int i; 536 537 input->private = session; 538 539 input->id.bustype = BUS_BLUETOOTH; 540 input->id.vendor = req->vendor; 541 input->id.product = req->product; 542 input->id.version = req->version; 543 544 if (req->subclass & 0x40) { 545 set_bit(EV_KEY, input->evbit); 546 set_bit(EV_LED, input->evbit); 547 set_bit(EV_REP, input->evbit); 548 549 set_bit(LED_NUML, input->ledbit); 550 set_bit(LED_CAPSL, input->ledbit); 551 set_bit(LED_SCROLLL, input->ledbit); 552 set_bit(LED_COMPOSE, input->ledbit); 553 set_bit(LED_KANA, input->ledbit); 554 555 for (i = 0; i < sizeof(hidp_keycode); i++) 556 set_bit(hidp_keycode[i], input->keybit); 557 clear_bit(0, input->keybit); 558 } 559 560 if (req->subclass & 0x80) { 561 input->evbit[0] = BIT(EV_KEY) | BIT(EV_REL); 562 input->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE); 563 input->relbit[0] = BIT(REL_X) | BIT(REL_Y); 564 input->keybit[LONG(BTN_MOUSE)] |= BIT(BTN_SIDE) | BIT(BTN_EXTRA); 565 input->relbit[0] |= BIT(REL_WHEEL); 566 } 567 568 input->event = hidp_input_event; 569 570 input_register_device(input); 571} 572 573int hidp_add_connection(struct hidp_connadd_req *req, struct socket *ctrl_sock, struct socket *intr_sock) 574{ 575 struct hidp_session *session, *s; 576 int err; 577 578 BT_DBG(""); 579 580 if (bacmp(&bt_sk(ctrl_sock->sk)->src, &bt_sk(intr_sock->sk)->src) || 581 bacmp(&bt_sk(ctrl_sock->sk)->dst, &bt_sk(intr_sock->sk)->dst)) 582 return -ENOTUNIQ; 583 584 session = kmalloc(sizeof(struct hidp_session), GFP_KERNEL); 585 if (!session) 586 return -ENOMEM; 587 memset(session, 0, sizeof(struct hidp_session)); 588 589 session->input = kmalloc(sizeof(struct input_dev), GFP_KERNEL); 590 if (!session->input) { 591 kfree(session); 592 return -ENOMEM; 593 } 594 memset(session->input, 0, sizeof(struct input_dev)); 595 596 down_write(&hidp_session_sem); 597 598 s = __hidp_get_session(&bt_sk(ctrl_sock->sk)->dst); 599 if (s && s->state == BT_CONNECTED) { 600 err = -EEXIST; 601 goto failed; 602 } 603 604 bacpy(&session->bdaddr, &bt_sk(ctrl_sock->sk)->dst); 605 606 session->ctrl_mtu = min_t(uint, l2cap_pi(ctrl_sock->sk)->omtu, l2cap_pi(ctrl_sock->sk)->imtu); 607 session->intr_mtu = min_t(uint, l2cap_pi(intr_sock->sk)->omtu, l2cap_pi(intr_sock->sk)->imtu); 608 609 BT_DBG("ctrl mtu %d intr mtu %d", session->ctrl_mtu, session->intr_mtu); 610 611 session->ctrl_sock = ctrl_sock; 612 session->intr_sock = intr_sock; 613 session->state = BT_CONNECTED; 614 615 init_timer(&session->timer); 616 617 session->timer.function = hidp_idle_timeout; 618 session->timer.data = (unsigned long) session; 619 620 skb_queue_head_init(&session->ctrl_transmit); 621 skb_queue_head_init(&session->intr_transmit); 622 623 session->flags = req->flags & (1 << HIDP_BLUETOOTH_VENDOR_ID); 624 session->idle_to = req->idle_to; 625 626 if (session->input) 627 hidp_setup_input(session, req); 628 629 __hidp_link_session(session); 630 631 hidp_set_timer(session); 632 633 err = kernel_thread(hidp_session, session, CLONE_KERNEL); 634 if (err < 0) 635 goto unlink; 636 637 if (session->input) { 638 hidp_send_ctrl_message(session, 639 HIDP_TRANS_SET_PROTOCOL | HIDP_PROTO_BOOT, NULL, 0); 640 session->flags |= (1 << HIDP_BOOT_PROTOCOL_MODE); 641 642 session->leds = 0xff; 643 hidp_input_event(session->input, EV_LED, 0, 0); 644 } 645 646 up_write(&hidp_session_sem); 647 return 0; 648 649unlink: 650 hidp_del_timer(session); 651 652 __hidp_unlink_session(session); 653 654 if (session->input) 655 input_unregister_device(session->input); 656 657failed: 658 up_write(&hidp_session_sem); 659 660 if (session->input) 661 kfree(session->input); 662 663 kfree(session); 664 return err; 665} 666 667int hidp_del_connection(struct hidp_conndel_req *req) 668{ 669 struct hidp_session *session; 670 int err = 0; 671 672 BT_DBG(""); 673 674 down_read(&hidp_session_sem); 675 676 session = __hidp_get_session(&req->bdaddr); 677 if (session) { 678 if (req->flags & (1 << HIDP_VIRTUAL_CABLE_UNPLUG)) { 679 hidp_send_ctrl_message(session, 680 HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG, NULL, 0); 681 } else { 682 /* Flush the transmit queues */ 683 skb_queue_purge(&session->ctrl_transmit); 684 skb_queue_purge(&session->intr_transmit); 685 686 /* Kill session thread */ 687 atomic_inc(&session->terminate); 688 hidp_schedule(session); 689 } 690 } else 691 err = -ENOENT; 692 693 up_read(&hidp_session_sem); 694 return err; 695} 696 697int hidp_get_connlist(struct hidp_connlist_req *req) 698{ 699 struct list_head *p; 700 int err = 0, n = 0; 701 702 BT_DBG(""); 703 704 down_read(&hidp_session_sem); 705 706 list_for_each(p, &hidp_session_list) { 707 struct hidp_session *session; 708 struct hidp_conninfo ci; 709 710 session = list_entry(p, struct hidp_session, list); 711 712 __hidp_copy_session(session, &ci); 713 714 if (copy_to_user(req->ci, &ci, sizeof(ci))) { 715 err = -EFAULT; 716 break; 717 } 718 719 if (++n >= req->cnum) 720 break; 721 722 req->ci++; 723 } 724 req->cnum = n; 725 726 up_read(&hidp_session_sem); 727 return err; 728} 729 730int hidp_get_conninfo(struct hidp_conninfo *ci) 731{ 732 struct hidp_session *session; 733 int err = 0; 734 735 down_read(&hidp_session_sem); 736 737 session = __hidp_get_session(&ci->bdaddr); 738 if (session) 739 __hidp_copy_session(session, ci); 740 else 741 err = -ENOENT; 742 743 up_read(&hidp_session_sem); 744 return err; 745} 746 747static int __init hidp_init(void) 748{ 749 l2cap_load(); 750 751 BT_INFO("HIDP (Human Interface Emulation) ver %s", VERSION); 752 753 return hidp_init_sockets(); 754} 755 756static void __exit hidp_exit(void) 757{ 758 hidp_cleanup_sockets(); 759} 760 761module_init(hidp_init); 762module_exit(hidp_exit); 763 764MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 765MODULE_DESCRIPTION("Bluetooth HIDP ver " VERSION); 766MODULE_VERSION(VERSION); 767MODULE_LICENSE("GPL"); 768MODULE_ALIAS("bt-proto-6"); 769