net/bluetooth/hci_sock.c

   1 /*
   2    BlueZ - Bluetooth protocol stack for Linux
   3    Copyright (C) 2000-2001 Qualcomm Incorporated
   4
   5    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License version 2 as
   9    published by the Free Software Foundation;
  10
  11    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  12    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  13    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  14    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  15    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  16    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19
  20    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  21    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  22    SOFTWARE IS DISCLAIMED.
  23 */
  24
  25 /* Bluetooth HCI sockets. */
  26
  27 #include <linux/module.h>
  28
  29 #include <linux/types.h>
  30 #include <linux/capability.h>
  31 #include <linux/errno.h>
  32 #include <linux/kernel.h>
  33 #include <linux/slab.h>
  34 #include <linux/poll.h>
  35 #include <linux/fcntl.h>
  36 #include <linux/init.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/workqueue.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/compat.h>
  41 #include <linux/socket.h>
  42 #include <linux/ioctl.h>
  43 #include <net/sock.h>
  44
  45 #include <asm/system.h>
  46 #include <asm/uaccess.h>
  47 #include <asm/unaligned.h>
  48
  49 #include <net/bluetooth/bluetooth.h>
  50 #include <net/bluetooth/hci_core.h>
  51
  52 /* ----- HCI socket interface ----- */
  53
  54 static inline int hci_test_bit(int nr, void *addr)
  55 {
  56         return *((__u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
  57 }
  58
  59 /* Security filter */
  60 static struct hci_sec_filter hci_sec_filter = {
  61         /* Packet types */
  62         0x10,
  63         /* Events */
  64         { 0x1000d9fe, 0x0000b00c },
  65         /* Commands */
  66         {
  67                 { 0x0 },
  68                 /* OGF_LINK_CTL */
  69                 { 0xbe000006, 0x00000001, 0x00000000, 0x00 },
  70                 /* OGF_LINK_POLICY */
  71                 { 0x00005200, 0x00000000, 0x00000000, 0x00 },
  72                 /* OGF_HOST_CTL */
  73                 { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 },
  74                 /* OGF_INFO_PARAM */
  75                 { 0x000002be, 0x00000000, 0x00000000, 0x00 },
  76                 /* OGF_STATUS_PARAM */
  77                 { 0x000000ea, 0x00000000, 0x00000000, 0x00 }
  78         }
  79 };
  80
  81 static struct bt_sock_list hci_sk_list = {
  82         .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock)
  83 };
  84
  85 /* Send frame to RAW socket */
  86 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
  87 {
  88         struct sock *sk;
  89         struct hlist_node *node;
  90
  91         BT_DBG("hdev %p len %d", hdev, skb->len);
  92
  93         read_lock(&hci_sk_list.lock);
  94         sk_for_each(sk, node, &hci_sk_list.head) {
  95                 struct hci_filter *flt;
  96                 struct sk_buff *nskb;
  97
  98                 if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev)
  99                         continue;
 100
 101                 /* Don't send frame to the socket it came from */
 102                 if (skb->sk == sk)
 103                         continue;
 104
 105                 /* Apply filter */
 106                 flt = &hci_pi(sk)->filter;
 107
 108                 if (!test_bit((bt_cb(skb)->pkt_type == HCI_VENDOR_PKT) ?
 109                                 0 : (bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS), &flt->type_mask))
 110                         continue;
 111
 112                 if (bt_cb(skb)->pkt_type == HCI_EVENT_PKT) {
 113                         register int evt = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS);
 114
 115                         if (!hci_test_bit(evt, &flt->event_mask))
 116                                 continue;
 117
 118                         if (flt->opcode &&
 119                             ((evt == HCI_EV_CMD_COMPLETE &&
 120                               flt->opcode !=
 121                               get_unaligned((__le16 *)(skb->data + 3))) ||
 122                              (evt == HCI_EV_CMD_STATUS &&
 123                               flt->opcode !=
 124                               get_unaligned((__le16 *)(skb->data + 4)))))
 125                                 continue;
 126                 }
 127
 128                 if (!(nskb = skb_clone(skb, GFP_ATOMIC)))
 129                         continue;
 130
 131                 /* Put type byte before the data */
 132                 memcpy(skb_push(nskb, 1), &bt_cb(nskb)->pkt_type, 1);
 133
 134                 if (sock_queue_rcv_skb(sk, nskb))
 135                         kfree_skb(nskb);
 136         }
 137         read_unlock(&hci_sk_list.lock);
 138 }
 139
 140 static int hci_sock_release(struct socket *sock)
 141 {
 142         struct sock *sk = sock->sk;
 143         struct hci_dev *hdev;
 144
 145         BT_DBG("sock %p sk %p", sock, sk);
 146
 147         if (!sk)
 148                 return 0;
 149
 150         hdev = hci_pi(sk)->hdev;
 151
 152         bt_sock_unlink(&hci_sk_list, sk);
 153
 154         if (hdev) {
 155                 atomic_dec(&hdev->promisc);
 156                 hci_dev_put(hdev);
 157         }
 158
 159         sock_orphan(sk);
 160
 161         skb_queue_purge(&sk->sk_receive_queue);
 162         skb_queue_purge(&sk->sk_write_queue);
 163
 164         sock_put(sk);
 165         return 0;
 166 }
 167
 168 struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
 169 {
 170         struct list_head *p;
 171
 172         list_for_each(p, &hdev->blacklist) {
 173                 struct bdaddr_list *b;
 174
 175                 b = list_entry(p, struct bdaddr_list, list);
 176
 177                 if (bacmp(bdaddr, &b->bdaddr) == 0)
 178                         return b;
 179         }
 180
 181         return NULL;
 182 }
 183
 184 static int hci_blacklist_add(struct hci_dev *hdev, void __user *arg)
 185 {
 186         bdaddr_t bdaddr;
 187         struct bdaddr_list *entry;
 188
 189         if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
 190                 return -EFAULT;
 191
 192         if (bacmp(&bdaddr, BDADDR_ANY) == 0)
 193                 return -EBADF;
 194
 195         if (hci_blacklist_lookup(hdev, &bdaddr))
 196                 return -EEXIST;
 197
 198         entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
 199         if (!entry)
 200                 return -ENOMEM;
 201
 202         bacpy(&entry->bdaddr, &bdaddr);
 203
 204         list_add(&entry->list, &hdev->blacklist);
 205
 206         return 0;
 207 }
 208
 209 int hci_blacklist_clear(struct hci_dev *hdev)
 210 {
 211         struct list_head *p, *n;
 212
 213         list_for_each_safe(p, n, &hdev->blacklist) {
 214                 struct bdaddr_list *b;
 215
 216                 b = list_entry(p, struct bdaddr_list, list);
 217
 218                 list_del(p);
 219                 kfree(b);
 220         }
 221
 222         return 0;
 223 }
 224
 225 static int hci_blacklist_del(struct hci_dev *hdev, void __user *arg)
 226 {
 227         bdaddr_t bdaddr;
 228         struct bdaddr_list *entry;
 229
 230         if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
 231                 return -EFAULT;
 232
 233         if (bacmp(&bdaddr, BDADDR_ANY) == 0)
 234                 return hci_blacklist_clear(hdev);
 235
 236         entry = hci_blacklist_lookup(hdev, &bdaddr);
 237         if (!entry)
 238                 return -ENOENT;
 239
 240         list_del(&entry->list);
 241         kfree(entry);
 242
 243         return 0;
 244 }
 245
 246 /* Ioctls that require bound socket */
 247 static inline int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
 248 {
 249         struct hci_dev *hdev = hci_pi(sk)->hdev;
 250
 251         if (!hdev)
 252                 return -EBADFD;
 253
 254         switch (cmd) {
 255         case HCISETRAW:
 256                 if (!capable(CAP_NET_ADMIN))
 257                         return -EACCES;
 258
 259                 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
 260                         return -EPERM;
 261
 262                 if (arg)
 263                         set_bit(HCI_RAW, &hdev->flags);
 264                 else
 265                         clear_bit(HCI_RAW, &hdev->flags);
 266
 267                 return 0;
 268
 269         case HCIGETCONNINFO:
 270                 return hci_get_conn_info(hdev, (void __user *) arg);
 271
 272         case HCIGETAUTHINFO:
 273                 return hci_get_auth_info(hdev, (void __user *) arg);
 274
 275         case HCIBLOCKADDR:
 276                 if (!capable(CAP_NET_ADMIN))
 277                         return -EACCES;
 278                 return hci_blacklist_add(hdev, (void __user *) arg);
 279
 280         case HCIUNBLOCKADDR:
 281                 if (!capable(CAP_NET_ADMIN))
 282                         return -EACCES;
 283                 return hci_blacklist_del(hdev, (void __user *) arg);
 284
 285         default:
 286                 if (hdev->ioctl)
 287                         return hdev->ioctl(hdev, cmd, arg);
 288                 return -EINVAL;
 289         }
 290 }
 291
 292 static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 293 {
 294         struct sock *sk = sock->sk;
 295         void __user *argp = (void __user *) arg;
 296         int err;
 297
 298         BT_DBG("cmd %x arg %lx", cmd, arg);
 299
 300         switch (cmd) {
 301         case HCIGETDEVLIST:
 302                 return hci_get_dev_list(argp);
 303
 304         case HCIGETDEVINFO:
 305                 return hci_get_dev_info(argp);
 306
 307         case HCIGETCONNLIST:
 308                 return hci_get_conn_list(argp);
 309
 310         case HCIDEVUP:
 311                 if (!capable(CAP_NET_ADMIN))
 312                         return -EACCES;
 313                 return hci_dev_open(arg);
 314
 315         case HCIDEVDOWN:
 316                 if (!capable(CAP_NET_ADMIN))
 317                         return -EACCES;
 318                 return hci_dev_close(arg);
 319
 320         case HCIDEVRESET:
 321                 if (!capable(CAP_NET_ADMIN))
 322                         return -EACCES;
 323                 return hci_dev_reset(arg);
 324
 325         case HCIDEVRESTAT:
 326                 if (!capable(CAP_NET_ADMIN))
 327                         return -EACCES;
 328                 return hci_dev_reset_stat(arg);
 329
 330         case HCISETSCAN:
 331         case HCISETAUTH:
 332         case HCISETENCRYPT:
 333         case HCISETPTYPE:
 334         case HCISETLINKPOL:
 335         case HCISETLINKMODE:
 336         case HCISETACLMTU:
 337         case HCISETSCOMTU:
 338                 if (!capable(CAP_NET_ADMIN))
 339                         return -EACCES;
 340                 return hci_dev_cmd(cmd, argp);
 341
 342         case HCIINQUIRY:
 343                 return hci_inquiry(argp);
 344
 345         default:
 346                 lock_sock(sk);
 347                 err = hci_sock_bound_ioctl(sk, cmd, arg);
 348                 release_sock(sk);
 349                 return err;
 350         }
 351 }
 352
 353 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
 354 {
 355         struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr;
 356         struct sock *sk = sock->sk;
 357         struct hci_dev *hdev = NULL;
 358         int err = 0;
 359
 360         BT_DBG("sock %p sk %p", sock, sk);
 361
 362         if (!haddr || haddr->hci_family != AF_BLUETOOTH)
 363                 return -EINVAL;
 364
 365         lock_sock(sk);
 366
 367         if (hci_pi(sk)->hdev) {
 368                 err = -EALREADY;
 369                 goto done;
 370         }
 371
 372         if (haddr->hci_dev != HCI_DEV_NONE) {
 373                 if (!(hdev = hci_dev_get(haddr->hci_dev))) {
 374                         err = -ENODEV;
 375                         goto done;
 376                 }
 377
 378                 atomic_inc(&hdev->promisc);
 379         }
 380
 381         hci_pi(sk)->hdev = hdev;
 382         sk->sk_state = BT_BOUND;
 383
 384 done:
 385         release_sock(sk);
 386         return err;
 387 }
 388
 389 static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, int *addr_len, int peer)
 390 {
 391         struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr;
 392         struct sock *sk = sock->sk;
 393         struct hci_dev *hdev = hci_pi(sk)->hdev;
 394
 395         BT_DBG("sock %p sk %p", sock, sk);
 396
 397         if (!hdev)
 398                 return -EBADFD;
 399
 400         lock_sock(sk);
 401
 402         *addr_len = sizeof(*haddr);
 403         haddr->hci_family = AF_BLUETOOTH;
 404         haddr->hci_dev    = hdev->id;
 405
 406         release_sock(sk);
 407         return 0;
 408 }
 409
 410 static inline void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
 411 {
 412         __u32 mask = hci_pi(sk)->cmsg_mask;
 413
 414         if (mask & HCI_CMSG_DIR) {
 415                 int incoming = bt_cb(skb)->incoming;
 416                 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), &incoming);
 417         }
 418
 419         if (mask & HCI_CMSG_TSTAMP) {
 420 #ifdef CONFIG_COMPAT
 421                 struct compat_timeval ctv;
 422 #endif
 423                 struct timeval tv;
 424                 void *data;
 425                 int len;
 426
 427                 skb_get_timestamp(skb, &tv);
 428
 429                 data = &tv;
 430                 len = sizeof(tv);
 431 #ifdef CONFIG_COMPAT
 432                 if (msg->msg_flags & MSG_CMSG_COMPAT) {
 433                         ctv.tv_sec = tv.tv_sec;
 434                         ctv.tv_usec = tv.tv_usec;
 435                         data = &ctv;
 436                         len = sizeof(ctv);
 437                 }
 438 #endif
 439
 440                 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
 441         }
 442 }
 443
 444 static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 445                                 struct msghdr *msg, size_t len, int flags)
 446 {
 447         int noblock = flags & MSG_DONTWAIT;
 448         struct sock *sk = sock->sk;
 449         struct sk_buff *skb;
 450         int copied, err;
 451
 452         BT_DBG("sock %p, sk %p", sock, sk);
 453
 454         if (flags & (MSG_OOB))
 455                 return -EOPNOTSUPP;
 456
 457         if (sk->sk_state == BT_CLOSED)
 458                 return 0;
 459
 460         if (!(skb = skb_recv_datagram(sk, flags, noblock, &err)))
 461                 return err;
 462
 463         msg->msg_namelen = 0;
 464
 465         copied = skb->len;
 466         if (len < copied) {
 467                 msg->msg_flags |= MSG_TRUNC;
 468                 copied = len;
 469         }
 470
 471         skb_reset_transport_header(skb);
 472         err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 473
 474         hci_sock_cmsg(sk, msg, skb);
 475
 476         skb_free_datagram(sk, skb);
 477
 478         return err ? : copied;
 479 }
 480
 481 static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
 482                             struct msghdr *msg, size_t len)
 483 {
 484         struct sock *sk = sock->sk;
 485         struct hci_dev *hdev;
 486         struct sk_buff *skb;
 487         int err;
 488
 489         BT_DBG("sock %p sk %p", sock, sk);
 490
 491         if (msg->msg_flags & MSG_OOB)
 492                 return -EOPNOTSUPP;
 493
 494         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE))
 495                 return -EINVAL;
 496
 497         if (len < 4 || len > HCI_MAX_FRAME_SIZE)
 498                 return -EINVAL;
 499
 500         lock_sock(sk);
 501
 502         if (!(hdev = hci_pi(sk)->hdev)) {
 503                 err = -EBADFD;
 504                 goto done;
 505         }
 506
 507         if (!test_bit(HCI_UP, &hdev->flags)) {
 508                 err = -ENETDOWN;
 509                 goto done;
 510         }
 511
 512         if (!(skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err)))
 513                 goto done;
 514
 515         if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
 516                 err = -EFAULT;
 517                 goto drop;
 518         }
 519
 520         bt_cb(skb)->pkt_type = *((unsigned char *) skb->data);
 521         skb_pull(skb, 1);
 522         skb->dev = (void *) hdev;
 523
 524         if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) {
 525                 u16 opcode = get_unaligned_le16(skb->data);
 526                 u16 ogf = hci_opcode_ogf(opcode);
 527                 u16 ocf = hci_opcode_ocf(opcode);
 528
 529                 if (((ogf > HCI_SFLT_MAX_OGF) ||
 530                                 !hci_test_bit(ocf & HCI_FLT_OCF_BITS, &hci_sec_filter.ocf_mask[ogf])) &&
 531                                         !capable(CAP_NET_RAW)) {
 532                         err = -EPERM;
 533                         goto drop;
 534                 }
 535
 536                 if (test_bit(HCI_RAW, &hdev->flags) || (ogf == 0x3f)) {
 537                         skb_queue_tail(&hdev->raw_q, skb);
 538                         tasklet_schedule(&hdev->tx_task);
 539                 } else {
 540                         skb_queue_tail(&hdev->cmd_q, skb);
 541                         tasklet_schedule(&hdev->cmd_task);
 542                 }
 543         } else {
 544                 if (!capable(CAP_NET_RAW)) {
 545                         err = -EPERM;
 546                         goto drop;
 547                 }
 548
 549                 skb_queue_tail(&hdev->raw_q, skb);
 550                 tasklet_schedule(&hdev->tx_task);
 551         }
 552
 553         err = len;
 554
 555 done:
 556         release_sock(sk);
 557         return err;
 558
 559 drop:
 560         kfree_skb(skb);
 561         goto done;
 562 }
 563
 564 static int hci_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int len)
 565 {
 566         struct hci_ufilter uf = { .opcode = 0 };
 567         struct sock *sk = sock->sk;
 568         int err = 0, opt = 0;
 569
 570         BT_DBG("sk %p, opt %d", sk, optname);
 571
 572         lock_sock(sk);
 573
 574         switch (optname) {
 575         case HCI_DATA_DIR:
 576                 if (get_user(opt, (int __user *)optval)) {
 577                         err = -EFAULT;
 578                         break;
 579                 }
 580
 581                 if (opt)
 582                         hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
 583                 else
 584                         hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
 585                 break;
 586
 587         case HCI_TIME_STAMP:
 588                 if (get_user(opt, (int __user *)optval)) {
 589                         err = -EFAULT;
 590                         break;
 591                 }
 592
 593                 if (opt)
 594                         hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
 595                 else
 596                         hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
 597                 break;
 598
 599         case HCI_FILTER:
 600                 {
 601                         struct hci_filter *f = &hci_pi(sk)->filter;
 602
 603                         uf.type_mask = f->type_mask;
 604                         uf.opcode    = f->opcode;
 605                         uf.event_mask[0] = *((u32 *) f->event_mask + 0);
 606                         uf.event_mask[1] = *((u32 *) f->event_mask + 1);
 607                 }
 608
 609                 len = min_t(unsigned int, len, sizeof(uf));
 610                 if (copy_from_user(&uf, optval, len)) {
 611                         err = -EFAULT;
 612                         break;
 613                 }
 614
 615                 if (!capable(CAP_NET_RAW)) {
 616                         uf.type_mask &= hci_sec_filter.type_mask;
 617                         uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
 618                         uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
 619                 }
 620
 621                 {
 622                         struct hci_filter *f = &hci_pi(sk)->filter;
 623
 624                         f->type_mask = uf.type_mask;
 625                         f->opcode    = uf.opcode;
 626                         *((u32 *) f->event_mask + 0) = uf.event_mask[0];
 627                         *((u32 *) f->event_mask + 1) = uf.event_mask[1];
 628                 }
 629                 break;
 630
 631         default:
 632                 err = -ENOPROTOOPT;
 633                 break;
 634         }
 635
 636         release_sock(sk);
 637         return err;
 638 }
 639
 640 static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
 641 {
 642         struct hci_ufilter uf;
 643         struct sock *sk = sock->sk;
 644         int len, opt;
 645
 646         if (get_user(len, optlen))
 647                 return -EFAULT;
 648
 649         switch (optname) {
 650         case HCI_DATA_DIR:
 651                 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
 652                         opt = 1;
 653                 else
 654                         opt = 0;
 655
 656                 if (put_user(opt, optval))
 657                         return -EFAULT;
 658                 break;
 659
 660         case HCI_TIME_STAMP:
 661                 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
 662                         opt = 1;
 663                 else
 664                         opt = 0;
 665
 666                 if (put_user(opt, optval))
 667                         return -EFAULT;
 668                 break;
 669
 670         case HCI_FILTER:
 671                 {
 672                         struct hci_filter *f = &hci_pi(sk)->filter;
 673
 674                         uf.type_mask = f->type_mask;
 675                         uf.opcode    = f->opcode;
 676                         uf.event_mask[0] = *((u32 *) f->event_mask + 0);
 677                         uf.event_mask[1] = *((u32 *) f->event_mask + 1);
 678                 }
 679
 680                 len = min_t(unsigned int, len, sizeof(uf));
 681                 if (copy_to_user(optval, &uf, len))
 682                         return -EFAULT;
 683                 break;
 684
 685         default:
 686                 return -ENOPROTOOPT;
 687                 break;
 688         }
 689
 690         return 0;
 691 }
 692
 693 static const struct proto_ops hci_sock_ops = {
 694         .family         = PF_BLUETOOTH,
 695         .owner          = THIS_MODULE,
 696         .release        = hci_sock_release,
 697         .bind           = hci_sock_bind,
 698         .getname        = hci_sock_getname,
 699         .sendmsg        = hci_sock_sendmsg,
 700         .recvmsg        = hci_sock_recvmsg,
 701         .ioctl          = hci_sock_ioctl,
 702         .poll           = datagram_poll,
 703         .listen         = sock_no_listen,
 704         .shutdown       = sock_no_shutdown,
 705         .setsockopt     = hci_sock_setsockopt,
 706         .getsockopt     = hci_sock_getsockopt,
 707         .connect        = sock_no_connect,
 708         .socketpair     = sock_no_socketpair,
 709         .accept         = sock_no_accept,
 710         .mmap           = sock_no_mmap
 711 };
 712
 713 static struct proto hci_sk_proto = {
 714         .name           = "HCI",
 715         .owner          = THIS_MODULE,
 716         .obj_size       = sizeof(struct hci_pinfo)
 717 };
 718
 719 static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
 720                            int kern)
 721 {
 722         struct sock *sk;
 723
 724         BT_DBG("sock %p", sock);
 725
 726         if (sock->type != SOCK_RAW)
 727                 return -ESOCKTNOSUPPORT;
 728
 729         sock->ops = &hci_sock_ops;
 730
 731         sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto);
 732         if (!sk)
 733                 return -ENOMEM;
 734
 735         sock_init_data(sock, sk);
 736
 737         sock_reset_flag(sk, SOCK_ZAPPED);
 738
 739         sk->sk_protocol = protocol;
 740
 741         sock->state = SS_UNCONNECTED;
 742         sk->sk_state = BT_OPEN;
 743
 744         bt_sock_link(&hci_sk_list, sk);
 745         return 0;
 746 }
 747
 748 static int hci_sock_dev_event(struct notifier_block *this, unsigned long event, void *ptr)
 749 {
 750         struct hci_dev *hdev = (struct hci_dev *) ptr;
 751         struct hci_ev_si_device ev;
 752
 753         BT_DBG("hdev %s event %ld", hdev->name, event);
 754
 755         /* Send event to sockets */
 756         ev.event  = event;
 757         ev.dev_id = hdev->id;
 758         hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev);
 759
 760         if (event == HCI_DEV_UNREG) {
 761                 struct sock *sk;
 762                 struct hlist_node *node;
 763
 764                 /* Detach sockets from device */
 765                 read_lock(&hci_sk_list.lock);
 766                 sk_for_each(sk, node, &hci_sk_list.head) {
 767                         local_bh_disable();
 768                         bh_lock_sock_nested(sk);
 769                         if (hci_pi(sk)->hdev == hdev) {
 770                                 hci_pi(sk)->hdev = NULL;
 771                                 sk->sk_err = EPIPE;
 772                                 sk->sk_state = BT_OPEN;
 773                                 sk->sk_state_change(sk);
 774
 775                                 hci_dev_put(hdev);
 776                         }
 777                         bh_unlock_sock(sk);
 778                         local_bh_enable();
 779                 }
 780                 read_unlock(&hci_sk_list.lock);
 781         }
 782
 783         return NOTIFY_DONE;
 784 }
 785
 786 static const struct net_proto_family hci_sock_family_ops = {
 787         .family = PF_BLUETOOTH,
 788         .owner  = THIS_MODULE,
 789         .create = hci_sock_create,
 790 };
 791
 792 static struct notifier_block hci_sock_nblock = {
 793         .notifier_call = hci_sock_dev_event
 794 };
 795
 796 int __init hci_sock_init(void)
 797 {
 798         int err;
 799
 800         err = proto_register(&hci_sk_proto, 0);
 801         if (err < 0)
 802                 return err;
 803
 804         err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
 805         if (err < 0)
 806                 goto error;
 807
 808         hci_register_notifier(&hci_sock_nblock);
 809
 810         BT_INFO("HCI socket layer initialized");
 811
 812         return 0;
 813
 814 error:
 815         BT_ERR("HCI socket registration failed");
 816         proto_unregister(&hci_sk_proto);
 817         return err;
 818 }
 819
 820 void __exit hci_sock_cleanup(void)
 821 {
 822         if (bt_sock_unregister(BTPROTO_HCI) < 0)
 823                 BT_ERR("HCI socket unregistration failed");
 824
 825         hci_unregister_notifier(&hci_sock_nblock);
 826
 827         proto_unregister(&hci_sk_proto);
 828 }