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 #include <linux/compat.h> 27 #include <linux/export.h> 28 #include <linux/utsname.h> 29 #include <linux/sched.h> 30 #include <asm/unaligned.h> 31 32 #include <net/bluetooth/bluetooth.h> 33 #include <net/bluetooth/hci_core.h> 34 #include <net/bluetooth/hci_mon.h> 35 #include <net/bluetooth/mgmt.h> 36 37 #include "mgmt_util.h" 38 39 static LIST_HEAD(mgmt_chan_list); 40 static DEFINE_MUTEX(mgmt_chan_list_lock); 41 42 static DEFINE_IDA(sock_cookie_ida); 43 44 static atomic_t monitor_promisc = ATOMIC_INIT(0); 45 46 /* ----- HCI socket interface ----- */ 47 48 /* Socket info */ 49 #define hci_pi(sk) ((struct hci_pinfo *) sk) 50 51 struct hci_pinfo { 52 struct bt_sock bt; 53 struct hci_dev *hdev; 54 struct hci_filter filter; 55 __u8 cmsg_mask; 56 unsigned short channel; 57 unsigned long flags; 58 __u32 cookie; 59 char comm[TASK_COMM_LEN]; 60 __u16 mtu; 61 }; 62 63 static struct hci_dev *hci_hdev_from_sock(struct sock *sk) 64 { 65 struct hci_dev *hdev = hci_pi(sk)->hdev; 66 67 if (!hdev) 68 return ERR_PTR(-EBADFD); 69 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) 70 return ERR_PTR(-EPIPE); 71 return hdev; 72 } 73 74 void hci_sock_set_flag(struct sock *sk, int nr) 75 { 76 set_bit(nr, &hci_pi(sk)->flags); 77 } 78 79 void hci_sock_clear_flag(struct sock *sk, int nr) 80 { 81 clear_bit(nr, &hci_pi(sk)->flags); 82 } 83 84 int hci_sock_test_flag(struct sock *sk, int nr) 85 { 86 return test_bit(nr, &hci_pi(sk)->flags); 87 } 88 89 unsigned short hci_sock_get_channel(struct sock *sk) 90 { 91 return hci_pi(sk)->channel; 92 } 93 94 u32 hci_sock_get_cookie(struct sock *sk) 95 { 96 return hci_pi(sk)->cookie; 97 } 98 99 static bool hci_sock_gen_cookie(struct sock *sk) 100 { 101 int id = hci_pi(sk)->cookie; 102 103 if (!id) { 104 id = ida_simple_get(&sock_cookie_ida, 1, 0, GFP_KERNEL); 105 if (id < 0) 106 id = 0xffffffff; 107 108 hci_pi(sk)->cookie = id; 109 get_task_comm(hci_pi(sk)->comm, current); 110 return true; 111 } 112 113 return false; 114 } 115 116 static void hci_sock_free_cookie(struct sock *sk) 117 { 118 int id = hci_pi(sk)->cookie; 119 120 if (id) { 121 hci_pi(sk)->cookie = 0xffffffff; 122 ida_simple_remove(&sock_cookie_ida, id); 123 } 124 } 125 126 static inline int hci_test_bit(int nr, const void *addr) 127 { 128 return *((const __u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31)); 129 } 130 131 /* Security filter */ 132 #define HCI_SFLT_MAX_OGF 5 133 134 struct hci_sec_filter { 135 __u32 type_mask; 136 __u32 event_mask[2]; 137 __u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4]; 138 }; 139 140 static const struct hci_sec_filter hci_sec_filter = { 141 /* Packet types */ 142 0x10, 143 /* Events */ 144 { 0x1000d9fe, 0x0000b00c }, 145 /* Commands */ 146 { 147 { 0x0 }, 148 /* OGF_LINK_CTL */ 149 { 0xbe000006, 0x00000001, 0x00000000, 0x00 }, 150 /* OGF_LINK_POLICY */ 151 { 0x00005200, 0x00000000, 0x00000000, 0x00 }, 152 /* OGF_HOST_CTL */ 153 { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 }, 154 /* OGF_INFO_PARAM */ 155 { 0x000002be, 0x00000000, 0x00000000, 0x00 }, 156 /* OGF_STATUS_PARAM */ 157 { 0x000000ea, 0x00000000, 0x00000000, 0x00 } 158 } 159 }; 160 161 static struct bt_sock_list hci_sk_list = { 162 .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock) 163 }; 164 165 static bool is_filtered_packet(struct sock *sk, struct sk_buff *skb) 166 { 167 struct hci_filter *flt; 168 int flt_type, flt_event; 169 170 /* Apply filter */ 171 flt = &hci_pi(sk)->filter; 172 173 flt_type = hci_skb_pkt_type(skb) & HCI_FLT_TYPE_BITS; 174 175 if (!test_bit(flt_type, &flt->type_mask)) 176 return true; 177 178 /* Extra filter for event packets only */ 179 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT) 180 return false; 181 182 flt_event = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS); 183 184 if (!hci_test_bit(flt_event, &flt->event_mask)) 185 return true; 186 187 /* Check filter only when opcode is set */ 188 if (!flt->opcode) 189 return false; 190 191 if (flt_event == HCI_EV_CMD_COMPLETE && 192 flt->opcode != get_unaligned((__le16 *)(skb->data + 3))) 193 return true; 194 195 if (flt_event == HCI_EV_CMD_STATUS && 196 flt->opcode != get_unaligned((__le16 *)(skb->data + 4))) 197 return true; 198 199 return false; 200 } 201 202 /* Send frame to RAW socket */ 203 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb) 204 { 205 struct sock *sk; 206 struct sk_buff *skb_copy = NULL; 207 208 BT_DBG("hdev %p len %d", hdev, skb->len); 209 210 read_lock(&hci_sk_list.lock); 211 212 sk_for_each(sk, &hci_sk_list.head) { 213 struct sk_buff *nskb; 214 215 if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev) 216 continue; 217 218 /* Don't send frame to the socket it came from */ 219 if (skb->sk == sk) 220 continue; 221 222 if (hci_pi(sk)->channel == HCI_CHANNEL_RAW) { 223 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT && 224 hci_skb_pkt_type(skb) != HCI_EVENT_PKT && 225 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT && 226 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT && 227 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) 228 continue; 229 if (is_filtered_packet(sk, skb)) 230 continue; 231 } else if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { 232 if (!bt_cb(skb)->incoming) 233 continue; 234 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT && 235 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT && 236 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT && 237 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) 238 continue; 239 } else { 240 /* Don't send frame to other channel types */ 241 continue; 242 } 243 244 if (!skb_copy) { 245 /* Create a private copy with headroom */ 246 skb_copy = __pskb_copy_fclone(skb, 1, GFP_ATOMIC, true); 247 if (!skb_copy) 248 continue; 249 250 /* Put type byte before the data */ 251 memcpy(skb_push(skb_copy, 1), &hci_skb_pkt_type(skb), 1); 252 } 253 254 nskb = skb_clone(skb_copy, GFP_ATOMIC); 255 if (!nskb) 256 continue; 257 258 if (sock_queue_rcv_skb(sk, nskb)) 259 kfree_skb(nskb); 260 } 261 262 read_unlock(&hci_sk_list.lock); 263 264 kfree_skb(skb_copy); 265 } 266 267 /* Send frame to sockets with specific channel */ 268 static void __hci_send_to_channel(unsigned short channel, struct sk_buff *skb, 269 int flag, struct sock *skip_sk) 270 { 271 struct sock *sk; 272 273 BT_DBG("channel %u len %d", channel, skb->len); 274 275 sk_for_each(sk, &hci_sk_list.head) { 276 struct sk_buff *nskb; 277 278 /* Ignore socket without the flag set */ 279 if (!hci_sock_test_flag(sk, flag)) 280 continue; 281 282 /* Skip the original socket */ 283 if (sk == skip_sk) 284 continue; 285 286 if (sk->sk_state != BT_BOUND) 287 continue; 288 289 if (hci_pi(sk)->channel != channel) 290 continue; 291 292 nskb = skb_clone(skb, GFP_ATOMIC); 293 if (!nskb) 294 continue; 295 296 if (sock_queue_rcv_skb(sk, nskb)) 297 kfree_skb(nskb); 298 } 299 300 } 301 302 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb, 303 int flag, struct sock *skip_sk) 304 { 305 read_lock(&hci_sk_list.lock); 306 __hci_send_to_channel(channel, skb, flag, skip_sk); 307 read_unlock(&hci_sk_list.lock); 308 } 309 310 /* Send frame to monitor socket */ 311 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb) 312 { 313 struct sk_buff *skb_copy = NULL; 314 struct hci_mon_hdr *hdr; 315 __le16 opcode; 316 317 if (!atomic_read(&monitor_promisc)) 318 return; 319 320 BT_DBG("hdev %p len %d", hdev, skb->len); 321 322 switch (hci_skb_pkt_type(skb)) { 323 case HCI_COMMAND_PKT: 324 opcode = cpu_to_le16(HCI_MON_COMMAND_PKT); 325 break; 326 case HCI_EVENT_PKT: 327 opcode = cpu_to_le16(HCI_MON_EVENT_PKT); 328 break; 329 case HCI_ACLDATA_PKT: 330 if (bt_cb(skb)->incoming) 331 opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT); 332 else 333 opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT); 334 break; 335 case HCI_SCODATA_PKT: 336 if (bt_cb(skb)->incoming) 337 opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT); 338 else 339 opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT); 340 break; 341 case HCI_ISODATA_PKT: 342 if (bt_cb(skb)->incoming) 343 opcode = cpu_to_le16(HCI_MON_ISO_RX_PKT); 344 else 345 opcode = cpu_to_le16(HCI_MON_ISO_TX_PKT); 346 break; 347 case HCI_DIAG_PKT: 348 opcode = cpu_to_le16(HCI_MON_VENDOR_DIAG); 349 break; 350 default: 351 return; 352 } 353 354 /* Create a private copy with headroom */ 355 skb_copy = __pskb_copy_fclone(skb, HCI_MON_HDR_SIZE, GFP_ATOMIC, true); 356 if (!skb_copy) 357 return; 358 359 /* Put header before the data */ 360 hdr = skb_push(skb_copy, HCI_MON_HDR_SIZE); 361 hdr->opcode = opcode; 362 hdr->index = cpu_to_le16(hdev->id); 363 hdr->len = cpu_to_le16(skb->len); 364 365 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb_copy, 366 HCI_SOCK_TRUSTED, NULL); 367 kfree_skb(skb_copy); 368 } 369 370 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event, 371 void *data, u16 data_len, ktime_t tstamp, 372 int flag, struct sock *skip_sk) 373 { 374 struct sock *sk; 375 __le16 index; 376 377 if (hdev) 378 index = cpu_to_le16(hdev->id); 379 else 380 index = cpu_to_le16(MGMT_INDEX_NONE); 381 382 read_lock(&hci_sk_list.lock); 383 384 sk_for_each(sk, &hci_sk_list.head) { 385 struct hci_mon_hdr *hdr; 386 struct sk_buff *skb; 387 388 if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL) 389 continue; 390 391 /* Ignore socket without the flag set */ 392 if (!hci_sock_test_flag(sk, flag)) 393 continue; 394 395 /* Skip the original socket */ 396 if (sk == skip_sk) 397 continue; 398 399 skb = bt_skb_alloc(6 + data_len, GFP_ATOMIC); 400 if (!skb) 401 continue; 402 403 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4)); 404 put_unaligned_le16(event, skb_put(skb, 2)); 405 406 if (data) 407 skb_put_data(skb, data, data_len); 408 409 skb->tstamp = tstamp; 410 411 hdr = skb_push(skb, HCI_MON_HDR_SIZE); 412 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT); 413 hdr->index = index; 414 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); 415 416 __hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 417 HCI_SOCK_TRUSTED, NULL); 418 kfree_skb(skb); 419 } 420 421 read_unlock(&hci_sk_list.lock); 422 } 423 424 static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event) 425 { 426 struct hci_mon_hdr *hdr; 427 struct hci_mon_new_index *ni; 428 struct hci_mon_index_info *ii; 429 struct sk_buff *skb; 430 __le16 opcode; 431 432 switch (event) { 433 case HCI_DEV_REG: 434 skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC); 435 if (!skb) 436 return NULL; 437 438 ni = skb_put(skb, HCI_MON_NEW_INDEX_SIZE); 439 ni->type = hdev->dev_type; 440 ni->bus = hdev->bus; 441 bacpy(&ni->bdaddr, &hdev->bdaddr); 442 memcpy(ni->name, hdev->name, 8); 443 444 opcode = cpu_to_le16(HCI_MON_NEW_INDEX); 445 break; 446 447 case HCI_DEV_UNREG: 448 skb = bt_skb_alloc(0, GFP_ATOMIC); 449 if (!skb) 450 return NULL; 451 452 opcode = cpu_to_le16(HCI_MON_DEL_INDEX); 453 break; 454 455 case HCI_DEV_SETUP: 456 if (hdev->manufacturer == 0xffff) 457 return NULL; 458 fallthrough; 459 460 case HCI_DEV_UP: 461 skb = bt_skb_alloc(HCI_MON_INDEX_INFO_SIZE, GFP_ATOMIC); 462 if (!skb) 463 return NULL; 464 465 ii = skb_put(skb, HCI_MON_INDEX_INFO_SIZE); 466 bacpy(&ii->bdaddr, &hdev->bdaddr); 467 ii->manufacturer = cpu_to_le16(hdev->manufacturer); 468 469 opcode = cpu_to_le16(HCI_MON_INDEX_INFO); 470 break; 471 472 case HCI_DEV_OPEN: 473 skb = bt_skb_alloc(0, GFP_ATOMIC); 474 if (!skb) 475 return NULL; 476 477 opcode = cpu_to_le16(HCI_MON_OPEN_INDEX); 478 break; 479 480 case HCI_DEV_CLOSE: 481 skb = bt_skb_alloc(0, GFP_ATOMIC); 482 if (!skb) 483 return NULL; 484 485 opcode = cpu_to_le16(HCI_MON_CLOSE_INDEX); 486 break; 487 488 default: 489 return NULL; 490 } 491 492 __net_timestamp(skb); 493 494 hdr = skb_push(skb, HCI_MON_HDR_SIZE); 495 hdr->opcode = opcode; 496 hdr->index = cpu_to_le16(hdev->id); 497 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); 498 499 return skb; 500 } 501 502 static struct sk_buff *create_monitor_ctrl_open(struct sock *sk) 503 { 504 struct hci_mon_hdr *hdr; 505 struct sk_buff *skb; 506 u16 format; 507 u8 ver[3]; 508 u32 flags; 509 510 /* No message needed when cookie is not present */ 511 if (!hci_pi(sk)->cookie) 512 return NULL; 513 514 switch (hci_pi(sk)->channel) { 515 case HCI_CHANNEL_RAW: 516 format = 0x0000; 517 ver[0] = BT_SUBSYS_VERSION; 518 put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1); 519 break; 520 case HCI_CHANNEL_USER: 521 format = 0x0001; 522 ver[0] = BT_SUBSYS_VERSION; 523 put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1); 524 break; 525 case HCI_CHANNEL_CONTROL: 526 format = 0x0002; 527 mgmt_fill_version_info(ver); 528 break; 529 default: 530 /* No message for unsupported format */ 531 return NULL; 532 } 533 534 skb = bt_skb_alloc(14 + TASK_COMM_LEN , GFP_ATOMIC); 535 if (!skb) 536 return NULL; 537 538 flags = hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) ? 0x1 : 0x0; 539 540 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4)); 541 put_unaligned_le16(format, skb_put(skb, 2)); 542 skb_put_data(skb, ver, sizeof(ver)); 543 put_unaligned_le32(flags, skb_put(skb, 4)); 544 skb_put_u8(skb, TASK_COMM_LEN); 545 skb_put_data(skb, hci_pi(sk)->comm, TASK_COMM_LEN); 546 547 __net_timestamp(skb); 548 549 hdr = skb_push(skb, HCI_MON_HDR_SIZE); 550 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_OPEN); 551 if (hci_pi(sk)->hdev) 552 hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id); 553 else 554 hdr->index = cpu_to_le16(HCI_DEV_NONE); 555 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); 556 557 return skb; 558 } 559 560 static struct sk_buff *create_monitor_ctrl_close(struct sock *sk) 561 { 562 struct hci_mon_hdr *hdr; 563 struct sk_buff *skb; 564 565 /* No message needed when cookie is not present */ 566 if (!hci_pi(sk)->cookie) 567 return NULL; 568 569 switch (hci_pi(sk)->channel) { 570 case HCI_CHANNEL_RAW: 571 case HCI_CHANNEL_USER: 572 case HCI_CHANNEL_CONTROL: 573 break; 574 default: 575 /* No message for unsupported format */ 576 return NULL; 577 } 578 579 skb = bt_skb_alloc(4, GFP_ATOMIC); 580 if (!skb) 581 return NULL; 582 583 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4)); 584 585 __net_timestamp(skb); 586 587 hdr = skb_push(skb, HCI_MON_HDR_SIZE); 588 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_CLOSE); 589 if (hci_pi(sk)->hdev) 590 hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id); 591 else 592 hdr->index = cpu_to_le16(HCI_DEV_NONE); 593 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); 594 595 return skb; 596 } 597 598 static struct sk_buff *create_monitor_ctrl_command(struct sock *sk, u16 index, 599 u16 opcode, u16 len, 600 const void *buf) 601 { 602 struct hci_mon_hdr *hdr; 603 struct sk_buff *skb; 604 605 skb = bt_skb_alloc(6 + len, GFP_ATOMIC); 606 if (!skb) 607 return NULL; 608 609 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4)); 610 put_unaligned_le16(opcode, skb_put(skb, 2)); 611 612 if (buf) 613 skb_put_data(skb, buf, len); 614 615 __net_timestamp(skb); 616 617 hdr = skb_push(skb, HCI_MON_HDR_SIZE); 618 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_COMMAND); 619 hdr->index = cpu_to_le16(index); 620 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); 621 622 return skb; 623 } 624 625 static void __printf(2, 3) 626 send_monitor_note(struct sock *sk, const char *fmt, ...) 627 { 628 size_t len; 629 struct hci_mon_hdr *hdr; 630 struct sk_buff *skb; 631 va_list args; 632 633 va_start(args, fmt); 634 len = vsnprintf(NULL, 0, fmt, args); 635 va_end(args); 636 637 skb = bt_skb_alloc(len + 1, GFP_ATOMIC); 638 if (!skb) 639 return; 640 641 va_start(args, fmt); 642 vsprintf(skb_put(skb, len), fmt, args); 643 *(u8 *)skb_put(skb, 1) = 0; 644 va_end(args); 645 646 __net_timestamp(skb); 647 648 hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE); 649 hdr->opcode = cpu_to_le16(HCI_MON_SYSTEM_NOTE); 650 hdr->index = cpu_to_le16(HCI_DEV_NONE); 651 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE); 652 653 if (sock_queue_rcv_skb(sk, skb)) 654 kfree_skb(skb); 655 } 656 657 static void send_monitor_replay(struct sock *sk) 658 { 659 struct hci_dev *hdev; 660 661 read_lock(&hci_dev_list_lock); 662 663 list_for_each_entry(hdev, &hci_dev_list, list) { 664 struct sk_buff *skb; 665 666 skb = create_monitor_event(hdev, HCI_DEV_REG); 667 if (!skb) 668 continue; 669 670 if (sock_queue_rcv_skb(sk, skb)) 671 kfree_skb(skb); 672 673 if (!test_bit(HCI_RUNNING, &hdev->flags)) 674 continue; 675 676 skb = create_monitor_event(hdev, HCI_DEV_OPEN); 677 if (!skb) 678 continue; 679 680 if (sock_queue_rcv_skb(sk, skb)) 681 kfree_skb(skb); 682 683 if (test_bit(HCI_UP, &hdev->flags)) 684 skb = create_monitor_event(hdev, HCI_DEV_UP); 685 else if (hci_dev_test_flag(hdev, HCI_SETUP)) 686 skb = create_monitor_event(hdev, HCI_DEV_SETUP); 687 else 688 skb = NULL; 689 690 if (skb) { 691 if (sock_queue_rcv_skb(sk, skb)) 692 kfree_skb(skb); 693 } 694 } 695 696 read_unlock(&hci_dev_list_lock); 697 } 698 699 static void send_monitor_control_replay(struct sock *mon_sk) 700 { 701 struct sock *sk; 702 703 read_lock(&hci_sk_list.lock); 704 705 sk_for_each(sk, &hci_sk_list.head) { 706 struct sk_buff *skb; 707 708 skb = create_monitor_ctrl_open(sk); 709 if (!skb) 710 continue; 711 712 if (sock_queue_rcv_skb(mon_sk, skb)) 713 kfree_skb(skb); 714 } 715 716 read_unlock(&hci_sk_list.lock); 717 } 718 719 /* Generate internal stack event */ 720 static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data) 721 { 722 struct hci_event_hdr *hdr; 723 struct hci_ev_stack_internal *ev; 724 struct sk_buff *skb; 725 726 skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC); 727 if (!skb) 728 return; 729 730 hdr = skb_put(skb, HCI_EVENT_HDR_SIZE); 731 hdr->evt = HCI_EV_STACK_INTERNAL; 732 hdr->plen = sizeof(*ev) + dlen; 733 734 ev = skb_put(skb, sizeof(*ev) + dlen); 735 ev->type = type; 736 memcpy(ev->data, data, dlen); 737 738 bt_cb(skb)->incoming = 1; 739 __net_timestamp(skb); 740 741 hci_skb_pkt_type(skb) = HCI_EVENT_PKT; 742 hci_send_to_sock(hdev, skb); 743 kfree_skb(skb); 744 } 745 746 void hci_sock_dev_event(struct hci_dev *hdev, int event) 747 { 748 BT_DBG("hdev %s event %d", hdev->name, event); 749 750 if (atomic_read(&monitor_promisc)) { 751 struct sk_buff *skb; 752 753 /* Send event to monitor */ 754 skb = create_monitor_event(hdev, event); 755 if (skb) { 756 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 757 HCI_SOCK_TRUSTED, NULL); 758 kfree_skb(skb); 759 } 760 } 761 762 if (event <= HCI_DEV_DOWN) { 763 struct hci_ev_si_device ev; 764 765 /* Send event to sockets */ 766 ev.event = event; 767 ev.dev_id = hdev->id; 768 hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev); 769 } 770 771 if (event == HCI_DEV_UNREG) { 772 struct sock *sk; 773 774 /* Wake up sockets using this dead device */ 775 read_lock(&hci_sk_list.lock); 776 sk_for_each(sk, &hci_sk_list.head) { 777 if (hci_pi(sk)->hdev == hdev) { 778 sk->sk_err = EPIPE; 779 sk->sk_state_change(sk); 780 } 781 } 782 read_unlock(&hci_sk_list.lock); 783 } 784 } 785 786 static struct hci_mgmt_chan *__hci_mgmt_chan_find(unsigned short channel) 787 { 788 struct hci_mgmt_chan *c; 789 790 list_for_each_entry(c, &mgmt_chan_list, list) { 791 if (c->channel == channel) 792 return c; 793 } 794 795 return NULL; 796 } 797 798 static struct hci_mgmt_chan *hci_mgmt_chan_find(unsigned short channel) 799 { 800 struct hci_mgmt_chan *c; 801 802 mutex_lock(&mgmt_chan_list_lock); 803 c = __hci_mgmt_chan_find(channel); 804 mutex_unlock(&mgmt_chan_list_lock); 805 806 return c; 807 } 808 809 int hci_mgmt_chan_register(struct hci_mgmt_chan *c) 810 { 811 if (c->channel < HCI_CHANNEL_CONTROL) 812 return -EINVAL; 813 814 mutex_lock(&mgmt_chan_list_lock); 815 if (__hci_mgmt_chan_find(c->channel)) { 816 mutex_unlock(&mgmt_chan_list_lock); 817 return -EALREADY; 818 } 819 820 list_add_tail(&c->list, &mgmt_chan_list); 821 822 mutex_unlock(&mgmt_chan_list_lock); 823 824 return 0; 825 } 826 EXPORT_SYMBOL(hci_mgmt_chan_register); 827 828 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c) 829 { 830 mutex_lock(&mgmt_chan_list_lock); 831 list_del(&c->list); 832 mutex_unlock(&mgmt_chan_list_lock); 833 } 834 EXPORT_SYMBOL(hci_mgmt_chan_unregister); 835 836 static int hci_sock_release(struct socket *sock) 837 { 838 struct sock *sk = sock->sk; 839 struct hci_dev *hdev; 840 struct sk_buff *skb; 841 842 BT_DBG("sock %p sk %p", sock, sk); 843 844 if (!sk) 845 return 0; 846 847 lock_sock(sk); 848 849 switch (hci_pi(sk)->channel) { 850 case HCI_CHANNEL_MONITOR: 851 atomic_dec(&monitor_promisc); 852 break; 853 case HCI_CHANNEL_RAW: 854 case HCI_CHANNEL_USER: 855 case HCI_CHANNEL_CONTROL: 856 /* Send event to monitor */ 857 skb = create_monitor_ctrl_close(sk); 858 if (skb) { 859 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 860 HCI_SOCK_TRUSTED, NULL); 861 kfree_skb(skb); 862 } 863 864 hci_sock_free_cookie(sk); 865 break; 866 } 867 868 bt_sock_unlink(&hci_sk_list, sk); 869 870 hdev = hci_pi(sk)->hdev; 871 if (hdev) { 872 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { 873 /* When releasing a user channel exclusive access, 874 * call hci_dev_do_close directly instead of calling 875 * hci_dev_close to ensure the exclusive access will 876 * be released and the controller brought back down. 877 * 878 * The checking of HCI_AUTO_OFF is not needed in this 879 * case since it will have been cleared already when 880 * opening the user channel. 881 */ 882 hci_dev_do_close(hdev); 883 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); 884 mgmt_index_added(hdev); 885 } 886 887 atomic_dec(&hdev->promisc); 888 hci_dev_put(hdev); 889 } 890 891 sock_orphan(sk); 892 893 skb_queue_purge(&sk->sk_receive_queue); 894 skb_queue_purge(&sk->sk_write_queue); 895 896 release_sock(sk); 897 sock_put(sk); 898 return 0; 899 } 900 901 static int hci_sock_reject_list_add(struct hci_dev *hdev, void __user *arg) 902 { 903 bdaddr_t bdaddr; 904 int err; 905 906 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) 907 return -EFAULT; 908 909 hci_dev_lock(hdev); 910 911 err = hci_bdaddr_list_add(&hdev->reject_list, &bdaddr, BDADDR_BREDR); 912 913 hci_dev_unlock(hdev); 914 915 return err; 916 } 917 918 static int hci_sock_reject_list_del(struct hci_dev *hdev, void __user *arg) 919 { 920 bdaddr_t bdaddr; 921 int err; 922 923 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) 924 return -EFAULT; 925 926 hci_dev_lock(hdev); 927 928 err = hci_bdaddr_list_del(&hdev->reject_list, &bdaddr, BDADDR_BREDR); 929 930 hci_dev_unlock(hdev); 931 932 return err; 933 } 934 935 /* Ioctls that require bound socket */ 936 static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, 937 unsigned long arg) 938 { 939 struct hci_dev *hdev = hci_hdev_from_sock(sk); 940 941 if (IS_ERR(hdev)) 942 return PTR_ERR(hdev); 943 944 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) 945 return -EBUSY; 946 947 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) 948 return -EOPNOTSUPP; 949 950 if (hdev->dev_type != HCI_PRIMARY) 951 return -EOPNOTSUPP; 952 953 switch (cmd) { 954 case HCISETRAW: 955 if (!capable(CAP_NET_ADMIN)) 956 return -EPERM; 957 return -EOPNOTSUPP; 958 959 case HCIGETCONNINFO: 960 return hci_get_conn_info(hdev, (void __user *)arg); 961 962 case HCIGETAUTHINFO: 963 return hci_get_auth_info(hdev, (void __user *)arg); 964 965 case HCIBLOCKADDR: 966 if (!capable(CAP_NET_ADMIN)) 967 return -EPERM; 968 return hci_sock_reject_list_add(hdev, (void __user *)arg); 969 970 case HCIUNBLOCKADDR: 971 if (!capable(CAP_NET_ADMIN)) 972 return -EPERM; 973 return hci_sock_reject_list_del(hdev, (void __user *)arg); 974 } 975 976 return -ENOIOCTLCMD; 977 } 978 979 static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, 980 unsigned long arg) 981 { 982 void __user *argp = (void __user *)arg; 983 struct sock *sk = sock->sk; 984 int err; 985 986 BT_DBG("cmd %x arg %lx", cmd, arg); 987 988 lock_sock(sk); 989 990 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { 991 err = -EBADFD; 992 goto done; 993 } 994 995 /* When calling an ioctl on an unbound raw socket, then ensure 996 * that the monitor gets informed. Ensure that the resulting event 997 * is only send once by checking if the cookie exists or not. The 998 * socket cookie will be only ever generated once for the lifetime 999 * of a given socket. 1000 */ 1001 if (hci_sock_gen_cookie(sk)) { 1002 struct sk_buff *skb; 1003 1004 if (capable(CAP_NET_ADMIN)) 1005 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); 1006 1007 /* Send event to monitor */ 1008 skb = create_monitor_ctrl_open(sk); 1009 if (skb) { 1010 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1011 HCI_SOCK_TRUSTED, NULL); 1012 kfree_skb(skb); 1013 } 1014 } 1015 1016 release_sock(sk); 1017 1018 switch (cmd) { 1019 case HCIGETDEVLIST: 1020 return hci_get_dev_list(argp); 1021 1022 case HCIGETDEVINFO: 1023 return hci_get_dev_info(argp); 1024 1025 case HCIGETCONNLIST: 1026 return hci_get_conn_list(argp); 1027 1028 case HCIDEVUP: 1029 if (!capable(CAP_NET_ADMIN)) 1030 return -EPERM; 1031 return hci_dev_open(arg); 1032 1033 case HCIDEVDOWN: 1034 if (!capable(CAP_NET_ADMIN)) 1035 return -EPERM; 1036 return hci_dev_close(arg); 1037 1038 case HCIDEVRESET: 1039 if (!capable(CAP_NET_ADMIN)) 1040 return -EPERM; 1041 return hci_dev_reset(arg); 1042 1043 case HCIDEVRESTAT: 1044 if (!capable(CAP_NET_ADMIN)) 1045 return -EPERM; 1046 return hci_dev_reset_stat(arg); 1047 1048 case HCISETSCAN: 1049 case HCISETAUTH: 1050 case HCISETENCRYPT: 1051 case HCISETPTYPE: 1052 case HCISETLINKPOL: 1053 case HCISETLINKMODE: 1054 case HCISETACLMTU: 1055 case HCISETSCOMTU: 1056 if (!capable(CAP_NET_ADMIN)) 1057 return -EPERM; 1058 return hci_dev_cmd(cmd, argp); 1059 1060 case HCIINQUIRY: 1061 return hci_inquiry(argp); 1062 } 1063 1064 lock_sock(sk); 1065 1066 err = hci_sock_bound_ioctl(sk, cmd, arg); 1067 1068 done: 1069 release_sock(sk); 1070 return err; 1071 } 1072 1073 #ifdef CONFIG_COMPAT 1074 static int hci_sock_compat_ioctl(struct socket *sock, unsigned int cmd, 1075 unsigned long arg) 1076 { 1077 switch (cmd) { 1078 case HCIDEVUP: 1079 case HCIDEVDOWN: 1080 case HCIDEVRESET: 1081 case HCIDEVRESTAT: 1082 return hci_sock_ioctl(sock, cmd, arg); 1083 } 1084 1085 return hci_sock_ioctl(sock, cmd, (unsigned long)compat_ptr(arg)); 1086 } 1087 #endif 1088 1089 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, 1090 int addr_len) 1091 { 1092 struct sockaddr_hci haddr; 1093 struct sock *sk = sock->sk; 1094 struct hci_dev *hdev = NULL; 1095 struct sk_buff *skb; 1096 int len, err = 0; 1097 1098 BT_DBG("sock %p sk %p", sock, sk); 1099 1100 if (!addr) 1101 return -EINVAL; 1102 1103 memset(&haddr, 0, sizeof(haddr)); 1104 len = min_t(unsigned int, sizeof(haddr), addr_len); 1105 memcpy(&haddr, addr, len); 1106 1107 if (haddr.hci_family != AF_BLUETOOTH) 1108 return -EINVAL; 1109 1110 lock_sock(sk); 1111 1112 /* Allow detaching from dead device and attaching to alive device, if 1113 * the caller wants to re-bind (instead of close) this socket in 1114 * response to hci_sock_dev_event(HCI_DEV_UNREG) notification. 1115 */ 1116 hdev = hci_pi(sk)->hdev; 1117 if (hdev && hci_dev_test_flag(hdev, HCI_UNREGISTER)) { 1118 hci_pi(sk)->hdev = NULL; 1119 sk->sk_state = BT_OPEN; 1120 hci_dev_put(hdev); 1121 } 1122 hdev = NULL; 1123 1124 if (sk->sk_state == BT_BOUND) { 1125 err = -EALREADY; 1126 goto done; 1127 } 1128 1129 switch (haddr.hci_channel) { 1130 case HCI_CHANNEL_RAW: 1131 if (hci_pi(sk)->hdev) { 1132 err = -EALREADY; 1133 goto done; 1134 } 1135 1136 if (haddr.hci_dev != HCI_DEV_NONE) { 1137 hdev = hci_dev_get(haddr.hci_dev); 1138 if (!hdev) { 1139 err = -ENODEV; 1140 goto done; 1141 } 1142 1143 atomic_inc(&hdev->promisc); 1144 } 1145 1146 hci_pi(sk)->channel = haddr.hci_channel; 1147 1148 if (!hci_sock_gen_cookie(sk)) { 1149 /* In the case when a cookie has already been assigned, 1150 * then there has been already an ioctl issued against 1151 * an unbound socket and with that triggered an open 1152 * notification. Send a close notification first to 1153 * allow the state transition to bounded. 1154 */ 1155 skb = create_monitor_ctrl_close(sk); 1156 if (skb) { 1157 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1158 HCI_SOCK_TRUSTED, NULL); 1159 kfree_skb(skb); 1160 } 1161 } 1162 1163 if (capable(CAP_NET_ADMIN)) 1164 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); 1165 1166 hci_pi(sk)->hdev = hdev; 1167 1168 /* Send event to monitor */ 1169 skb = create_monitor_ctrl_open(sk); 1170 if (skb) { 1171 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1172 HCI_SOCK_TRUSTED, NULL); 1173 kfree_skb(skb); 1174 } 1175 break; 1176 1177 case HCI_CHANNEL_USER: 1178 if (hci_pi(sk)->hdev) { 1179 err = -EALREADY; 1180 goto done; 1181 } 1182 1183 if (haddr.hci_dev == HCI_DEV_NONE) { 1184 err = -EINVAL; 1185 goto done; 1186 } 1187 1188 if (!capable(CAP_NET_ADMIN)) { 1189 err = -EPERM; 1190 goto done; 1191 } 1192 1193 hdev = hci_dev_get(haddr.hci_dev); 1194 if (!hdev) { 1195 err = -ENODEV; 1196 goto done; 1197 } 1198 1199 if (test_bit(HCI_INIT, &hdev->flags) || 1200 hci_dev_test_flag(hdev, HCI_SETUP) || 1201 hci_dev_test_flag(hdev, HCI_CONFIG) || 1202 (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) && 1203 test_bit(HCI_UP, &hdev->flags))) { 1204 err = -EBUSY; 1205 hci_dev_put(hdev); 1206 goto done; 1207 } 1208 1209 if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) { 1210 err = -EUSERS; 1211 hci_dev_put(hdev); 1212 goto done; 1213 } 1214 1215 mgmt_index_removed(hdev); 1216 1217 err = hci_dev_open(hdev->id); 1218 if (err) { 1219 if (err == -EALREADY) { 1220 /* In case the transport is already up and 1221 * running, clear the error here. 1222 * 1223 * This can happen when opening a user 1224 * channel and HCI_AUTO_OFF grace period 1225 * is still active. 1226 */ 1227 err = 0; 1228 } else { 1229 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); 1230 mgmt_index_added(hdev); 1231 hci_dev_put(hdev); 1232 goto done; 1233 } 1234 } 1235 1236 hci_pi(sk)->channel = haddr.hci_channel; 1237 1238 if (!hci_sock_gen_cookie(sk)) { 1239 /* In the case when a cookie has already been assigned, 1240 * this socket will transition from a raw socket into 1241 * a user channel socket. For a clean transition, send 1242 * the close notification first. 1243 */ 1244 skb = create_monitor_ctrl_close(sk); 1245 if (skb) { 1246 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1247 HCI_SOCK_TRUSTED, NULL); 1248 kfree_skb(skb); 1249 } 1250 } 1251 1252 /* The user channel is restricted to CAP_NET_ADMIN 1253 * capabilities and with that implicitly trusted. 1254 */ 1255 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); 1256 1257 hci_pi(sk)->hdev = hdev; 1258 1259 /* Send event to monitor */ 1260 skb = create_monitor_ctrl_open(sk); 1261 if (skb) { 1262 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1263 HCI_SOCK_TRUSTED, NULL); 1264 kfree_skb(skb); 1265 } 1266 1267 atomic_inc(&hdev->promisc); 1268 break; 1269 1270 case HCI_CHANNEL_MONITOR: 1271 if (haddr.hci_dev != HCI_DEV_NONE) { 1272 err = -EINVAL; 1273 goto done; 1274 } 1275 1276 if (!capable(CAP_NET_RAW)) { 1277 err = -EPERM; 1278 goto done; 1279 } 1280 1281 hci_pi(sk)->channel = haddr.hci_channel; 1282 1283 /* The monitor interface is restricted to CAP_NET_RAW 1284 * capabilities and with that implicitly trusted. 1285 */ 1286 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); 1287 1288 send_monitor_note(sk, "Linux version %s (%s)", 1289 init_utsname()->release, 1290 init_utsname()->machine); 1291 send_monitor_note(sk, "Bluetooth subsystem version %u.%u", 1292 BT_SUBSYS_VERSION, BT_SUBSYS_REVISION); 1293 send_monitor_replay(sk); 1294 send_monitor_control_replay(sk); 1295 1296 atomic_inc(&monitor_promisc); 1297 break; 1298 1299 case HCI_CHANNEL_LOGGING: 1300 if (haddr.hci_dev != HCI_DEV_NONE) { 1301 err = -EINVAL; 1302 goto done; 1303 } 1304 1305 if (!capable(CAP_NET_ADMIN)) { 1306 err = -EPERM; 1307 goto done; 1308 } 1309 1310 hci_pi(sk)->channel = haddr.hci_channel; 1311 break; 1312 1313 default: 1314 if (!hci_mgmt_chan_find(haddr.hci_channel)) { 1315 err = -EINVAL; 1316 goto done; 1317 } 1318 1319 if (haddr.hci_dev != HCI_DEV_NONE) { 1320 err = -EINVAL; 1321 goto done; 1322 } 1323 1324 /* Users with CAP_NET_ADMIN capabilities are allowed 1325 * access to all management commands and events. For 1326 * untrusted users the interface is restricted and 1327 * also only untrusted events are sent. 1328 */ 1329 if (capable(CAP_NET_ADMIN)) 1330 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); 1331 1332 hci_pi(sk)->channel = haddr.hci_channel; 1333 1334 /* At the moment the index and unconfigured index events 1335 * are enabled unconditionally. Setting them on each 1336 * socket when binding keeps this functionality. They 1337 * however might be cleared later and then sending of these 1338 * events will be disabled, but that is then intentional. 1339 * 1340 * This also enables generic events that are safe to be 1341 * received by untrusted users. Example for such events 1342 * are changes to settings, class of device, name etc. 1343 */ 1344 if (hci_pi(sk)->channel == HCI_CHANNEL_CONTROL) { 1345 if (!hci_sock_gen_cookie(sk)) { 1346 /* In the case when a cookie has already been 1347 * assigned, this socket will transition from 1348 * a raw socket into a control socket. To 1349 * allow for a clean transition, send the 1350 * close notification first. 1351 */ 1352 skb = create_monitor_ctrl_close(sk); 1353 if (skb) { 1354 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1355 HCI_SOCK_TRUSTED, NULL); 1356 kfree_skb(skb); 1357 } 1358 } 1359 1360 /* Send event to monitor */ 1361 skb = create_monitor_ctrl_open(sk); 1362 if (skb) { 1363 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1364 HCI_SOCK_TRUSTED, NULL); 1365 kfree_skb(skb); 1366 } 1367 1368 hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS); 1369 hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS); 1370 hci_sock_set_flag(sk, HCI_MGMT_OPTION_EVENTS); 1371 hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS); 1372 hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS); 1373 hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS); 1374 } 1375 break; 1376 } 1377 1378 /* Default MTU to HCI_MAX_FRAME_SIZE if not set */ 1379 if (!hci_pi(sk)->mtu) 1380 hci_pi(sk)->mtu = HCI_MAX_FRAME_SIZE; 1381 1382 sk->sk_state = BT_BOUND; 1383 1384 done: 1385 release_sock(sk); 1386 return err; 1387 } 1388 1389 static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, 1390 int peer) 1391 { 1392 struct sockaddr_hci *haddr = (struct sockaddr_hci *)addr; 1393 struct sock *sk = sock->sk; 1394 struct hci_dev *hdev; 1395 int err = 0; 1396 1397 BT_DBG("sock %p sk %p", sock, sk); 1398 1399 if (peer) 1400 return -EOPNOTSUPP; 1401 1402 lock_sock(sk); 1403 1404 hdev = hci_hdev_from_sock(sk); 1405 if (IS_ERR(hdev)) { 1406 err = PTR_ERR(hdev); 1407 goto done; 1408 } 1409 1410 haddr->hci_family = AF_BLUETOOTH; 1411 haddr->hci_dev = hdev->id; 1412 haddr->hci_channel= hci_pi(sk)->channel; 1413 err = sizeof(*haddr); 1414 1415 done: 1416 release_sock(sk); 1417 return err; 1418 } 1419 1420 static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, 1421 struct sk_buff *skb) 1422 { 1423 __u8 mask = hci_pi(sk)->cmsg_mask; 1424 1425 if (mask & HCI_CMSG_DIR) { 1426 int incoming = bt_cb(skb)->incoming; 1427 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), 1428 &incoming); 1429 } 1430 1431 if (mask & HCI_CMSG_TSTAMP) { 1432 #ifdef CONFIG_COMPAT 1433 struct old_timeval32 ctv; 1434 #endif 1435 struct __kernel_old_timeval tv; 1436 void *data; 1437 int len; 1438 1439 skb_get_timestamp(skb, &tv); 1440 1441 data = &tv; 1442 len = sizeof(tv); 1443 #ifdef CONFIG_COMPAT 1444 if (!COMPAT_USE_64BIT_TIME && 1445 (msg->msg_flags & MSG_CMSG_COMPAT)) { 1446 ctv.tv_sec = tv.tv_sec; 1447 ctv.tv_usec = tv.tv_usec; 1448 data = &ctv; 1449 len = sizeof(ctv); 1450 } 1451 #endif 1452 1453 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data); 1454 } 1455 } 1456 1457 static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg, 1458 size_t len, int flags) 1459 { 1460 int noblock = flags & MSG_DONTWAIT; 1461 struct sock *sk = sock->sk; 1462 struct sk_buff *skb; 1463 int copied, err; 1464 unsigned int skblen; 1465 1466 BT_DBG("sock %p, sk %p", sock, sk); 1467 1468 if (flags & MSG_OOB) 1469 return -EOPNOTSUPP; 1470 1471 if (hci_pi(sk)->channel == HCI_CHANNEL_LOGGING) 1472 return -EOPNOTSUPP; 1473 1474 if (sk->sk_state == BT_CLOSED) 1475 return 0; 1476 1477 skb = skb_recv_datagram(sk, flags, noblock, &err); 1478 if (!skb) 1479 return err; 1480 1481 skblen = skb->len; 1482 copied = skb->len; 1483 if (len < copied) { 1484 msg->msg_flags |= MSG_TRUNC; 1485 copied = len; 1486 } 1487 1488 skb_reset_transport_header(skb); 1489 err = skb_copy_datagram_msg(skb, 0, msg, copied); 1490 1491 switch (hci_pi(sk)->channel) { 1492 case HCI_CHANNEL_RAW: 1493 hci_sock_cmsg(sk, msg, skb); 1494 break; 1495 case HCI_CHANNEL_USER: 1496 case HCI_CHANNEL_MONITOR: 1497 sock_recv_timestamp(msg, sk, skb); 1498 break; 1499 default: 1500 if (hci_mgmt_chan_find(hci_pi(sk)->channel)) 1501 sock_recv_timestamp(msg, sk, skb); 1502 break; 1503 } 1504 1505 skb_free_datagram(sk, skb); 1506 1507 if (flags & MSG_TRUNC) 1508 copied = skblen; 1509 1510 return err ? : copied; 1511 } 1512 1513 static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk, 1514 struct sk_buff *skb) 1515 { 1516 u8 *cp; 1517 struct mgmt_hdr *hdr; 1518 u16 opcode, index, len; 1519 struct hci_dev *hdev = NULL; 1520 const struct hci_mgmt_handler *handler; 1521 bool var_len, no_hdev; 1522 int err; 1523 1524 BT_DBG("got %d bytes", skb->len); 1525 1526 if (skb->len < sizeof(*hdr)) 1527 return -EINVAL; 1528 1529 hdr = (void *)skb->data; 1530 opcode = __le16_to_cpu(hdr->opcode); 1531 index = __le16_to_cpu(hdr->index); 1532 len = __le16_to_cpu(hdr->len); 1533 1534 if (len != skb->len - sizeof(*hdr)) { 1535 err = -EINVAL; 1536 goto done; 1537 } 1538 1539 if (chan->channel == HCI_CHANNEL_CONTROL) { 1540 struct sk_buff *cmd; 1541 1542 /* Send event to monitor */ 1543 cmd = create_monitor_ctrl_command(sk, index, opcode, len, 1544 skb->data + sizeof(*hdr)); 1545 if (cmd) { 1546 hci_send_to_channel(HCI_CHANNEL_MONITOR, cmd, 1547 HCI_SOCK_TRUSTED, NULL); 1548 kfree_skb(cmd); 1549 } 1550 } 1551 1552 if (opcode >= chan->handler_count || 1553 chan->handlers[opcode].func == NULL) { 1554 BT_DBG("Unknown op %u", opcode); 1555 err = mgmt_cmd_status(sk, index, opcode, 1556 MGMT_STATUS_UNKNOWN_COMMAND); 1557 goto done; 1558 } 1559 1560 handler = &chan->handlers[opcode]; 1561 1562 if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) && 1563 !(handler->flags & HCI_MGMT_UNTRUSTED)) { 1564 err = mgmt_cmd_status(sk, index, opcode, 1565 MGMT_STATUS_PERMISSION_DENIED); 1566 goto done; 1567 } 1568 1569 if (index != MGMT_INDEX_NONE) { 1570 hdev = hci_dev_get(index); 1571 if (!hdev) { 1572 err = mgmt_cmd_status(sk, index, opcode, 1573 MGMT_STATUS_INVALID_INDEX); 1574 goto done; 1575 } 1576 1577 if (hci_dev_test_flag(hdev, HCI_SETUP) || 1578 hci_dev_test_flag(hdev, HCI_CONFIG) || 1579 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { 1580 err = mgmt_cmd_status(sk, index, opcode, 1581 MGMT_STATUS_INVALID_INDEX); 1582 goto done; 1583 } 1584 1585 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) && 1586 !(handler->flags & HCI_MGMT_UNCONFIGURED)) { 1587 err = mgmt_cmd_status(sk, index, opcode, 1588 MGMT_STATUS_INVALID_INDEX); 1589 goto done; 1590 } 1591 } 1592 1593 if (!(handler->flags & HCI_MGMT_HDEV_OPTIONAL)) { 1594 no_hdev = (handler->flags & HCI_MGMT_NO_HDEV); 1595 if (no_hdev != !hdev) { 1596 err = mgmt_cmd_status(sk, index, opcode, 1597 MGMT_STATUS_INVALID_INDEX); 1598 goto done; 1599 } 1600 } 1601 1602 var_len = (handler->flags & HCI_MGMT_VAR_LEN); 1603 if ((var_len && len < handler->data_len) || 1604 (!var_len && len != handler->data_len)) { 1605 err = mgmt_cmd_status(sk, index, opcode, 1606 MGMT_STATUS_INVALID_PARAMS); 1607 goto done; 1608 } 1609 1610 if (hdev && chan->hdev_init) 1611 chan->hdev_init(sk, hdev); 1612 1613 cp = skb->data + sizeof(*hdr); 1614 1615 err = handler->func(sk, hdev, cp, len); 1616 if (err < 0) 1617 goto done; 1618 1619 err = skb->len; 1620 1621 done: 1622 if (hdev) 1623 hci_dev_put(hdev); 1624 1625 return err; 1626 } 1627 1628 static int hci_logging_frame(struct sock *sk, struct sk_buff *skb, 1629 unsigned int flags) 1630 { 1631 struct hci_mon_hdr *hdr; 1632 struct hci_dev *hdev; 1633 u16 index; 1634 int err; 1635 1636 /* The logging frame consists at minimum of the standard header, 1637 * the priority byte, the ident length byte and at least one string 1638 * terminator NUL byte. Anything shorter are invalid packets. 1639 */ 1640 if (skb->len < sizeof(*hdr) + 3) 1641 return -EINVAL; 1642 1643 hdr = (void *)skb->data; 1644 1645 if (__le16_to_cpu(hdr->len) != skb->len - sizeof(*hdr)) 1646 return -EINVAL; 1647 1648 if (__le16_to_cpu(hdr->opcode) == 0x0000) { 1649 __u8 priority = skb->data[sizeof(*hdr)]; 1650 __u8 ident_len = skb->data[sizeof(*hdr) + 1]; 1651 1652 /* Only the priorities 0-7 are valid and with that any other 1653 * value results in an invalid packet. 1654 * 1655 * The priority byte is followed by an ident length byte and 1656 * the NUL terminated ident string. Check that the ident 1657 * length is not overflowing the packet and also that the 1658 * ident string itself is NUL terminated. In case the ident 1659 * length is zero, the length value actually doubles as NUL 1660 * terminator identifier. 1661 * 1662 * The message follows the ident string (if present) and 1663 * must be NUL terminated. Otherwise it is not a valid packet. 1664 */ 1665 if (priority > 7 || skb->data[skb->len - 1] != 0x00 || 1666 ident_len > skb->len - sizeof(*hdr) - 3 || 1667 skb->data[sizeof(*hdr) + ident_len + 1] != 0x00) 1668 return -EINVAL; 1669 } else { 1670 return -EINVAL; 1671 } 1672 1673 index = __le16_to_cpu(hdr->index); 1674 1675 if (index != MGMT_INDEX_NONE) { 1676 hdev = hci_dev_get(index); 1677 if (!hdev) 1678 return -ENODEV; 1679 } else { 1680 hdev = NULL; 1681 } 1682 1683 hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING); 1684 1685 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL); 1686 err = skb->len; 1687 1688 if (hdev) 1689 hci_dev_put(hdev); 1690 1691 return err; 1692 } 1693 1694 static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg, 1695 size_t len) 1696 { 1697 struct sock *sk = sock->sk; 1698 struct hci_mgmt_chan *chan; 1699 struct hci_dev *hdev; 1700 struct sk_buff *skb; 1701 int err; 1702 const unsigned int flags = msg->msg_flags; 1703 1704 BT_DBG("sock %p sk %p", sock, sk); 1705 1706 if (flags & MSG_OOB) 1707 return -EOPNOTSUPP; 1708 1709 if (flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE | MSG_CMSG_COMPAT)) 1710 return -EINVAL; 1711 1712 if (len < 4 || len > hci_pi(sk)->mtu) 1713 return -EINVAL; 1714 1715 skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0); 1716 if (IS_ERR(skb)) 1717 return PTR_ERR(skb); 1718 1719 lock_sock(sk); 1720 1721 switch (hci_pi(sk)->channel) { 1722 case HCI_CHANNEL_RAW: 1723 case HCI_CHANNEL_USER: 1724 break; 1725 case HCI_CHANNEL_MONITOR: 1726 err = -EOPNOTSUPP; 1727 goto drop; 1728 case HCI_CHANNEL_LOGGING: 1729 err = hci_logging_frame(sk, skb, flags); 1730 goto drop; 1731 default: 1732 mutex_lock(&mgmt_chan_list_lock); 1733 chan = __hci_mgmt_chan_find(hci_pi(sk)->channel); 1734 if (chan) 1735 err = hci_mgmt_cmd(chan, sk, skb); 1736 else 1737 err = -EINVAL; 1738 1739 mutex_unlock(&mgmt_chan_list_lock); 1740 goto drop; 1741 } 1742 1743 hdev = hci_hdev_from_sock(sk); 1744 if (IS_ERR(hdev)) { 1745 err = PTR_ERR(hdev); 1746 goto drop; 1747 } 1748 1749 if (!test_bit(HCI_UP, &hdev->flags)) { 1750 err = -ENETDOWN; 1751 goto drop; 1752 } 1753 1754 hci_skb_pkt_type(skb) = skb->data[0]; 1755 skb_pull(skb, 1); 1756 1757 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { 1758 /* No permission check is needed for user channel 1759 * since that gets enforced when binding the socket. 1760 * 1761 * However check that the packet type is valid. 1762 */ 1763 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT && 1764 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT && 1765 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT && 1766 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) { 1767 err = -EINVAL; 1768 goto drop; 1769 } 1770 1771 skb_queue_tail(&hdev->raw_q, skb); 1772 queue_work(hdev->workqueue, &hdev->tx_work); 1773 } else if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT) { 1774 u16 opcode = get_unaligned_le16(skb->data); 1775 u16 ogf = hci_opcode_ogf(opcode); 1776 u16 ocf = hci_opcode_ocf(opcode); 1777 1778 if (((ogf > HCI_SFLT_MAX_OGF) || 1779 !hci_test_bit(ocf & HCI_FLT_OCF_BITS, 1780 &hci_sec_filter.ocf_mask[ogf])) && 1781 !capable(CAP_NET_RAW)) { 1782 err = -EPERM; 1783 goto drop; 1784 } 1785 1786 /* Since the opcode has already been extracted here, store 1787 * a copy of the value for later use by the drivers. 1788 */ 1789 hci_skb_opcode(skb) = opcode; 1790 1791 if (ogf == 0x3f) { 1792 skb_queue_tail(&hdev->raw_q, skb); 1793 queue_work(hdev->workqueue, &hdev->tx_work); 1794 } else { 1795 /* Stand-alone HCI commands must be flagged as 1796 * single-command requests. 1797 */ 1798 bt_cb(skb)->hci.req_flags |= HCI_REQ_START; 1799 1800 skb_queue_tail(&hdev->cmd_q, skb); 1801 queue_work(hdev->workqueue, &hdev->cmd_work); 1802 } 1803 } else { 1804 if (!capable(CAP_NET_RAW)) { 1805 err = -EPERM; 1806 goto drop; 1807 } 1808 1809 if (hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT && 1810 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT && 1811 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) { 1812 err = -EINVAL; 1813 goto drop; 1814 } 1815 1816 skb_queue_tail(&hdev->raw_q, skb); 1817 queue_work(hdev->workqueue, &hdev->tx_work); 1818 } 1819 1820 err = len; 1821 1822 done: 1823 release_sock(sk); 1824 return err; 1825 1826 drop: 1827 kfree_skb(skb); 1828 goto done; 1829 } 1830 1831 static int hci_sock_setsockopt_old(struct socket *sock, int level, int optname, 1832 sockptr_t optval, unsigned int len) 1833 { 1834 struct hci_ufilter uf = { .opcode = 0 }; 1835 struct sock *sk = sock->sk; 1836 int err = 0, opt = 0; 1837 1838 BT_DBG("sk %p, opt %d", sk, optname); 1839 1840 lock_sock(sk); 1841 1842 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { 1843 err = -EBADFD; 1844 goto done; 1845 } 1846 1847 switch (optname) { 1848 case HCI_DATA_DIR: 1849 if (copy_from_sockptr(&opt, optval, sizeof(opt))) { 1850 err = -EFAULT; 1851 break; 1852 } 1853 1854 if (opt) 1855 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR; 1856 else 1857 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR; 1858 break; 1859 1860 case HCI_TIME_STAMP: 1861 if (copy_from_sockptr(&opt, optval, sizeof(opt))) { 1862 err = -EFAULT; 1863 break; 1864 } 1865 1866 if (opt) 1867 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP; 1868 else 1869 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP; 1870 break; 1871 1872 case HCI_FILTER: 1873 { 1874 struct hci_filter *f = &hci_pi(sk)->filter; 1875 1876 uf.type_mask = f->type_mask; 1877 uf.opcode = f->opcode; 1878 uf.event_mask[0] = *((u32 *) f->event_mask + 0); 1879 uf.event_mask[1] = *((u32 *) f->event_mask + 1); 1880 } 1881 1882 len = min_t(unsigned int, len, sizeof(uf)); 1883 if (copy_from_sockptr(&uf, optval, len)) { 1884 err = -EFAULT; 1885 break; 1886 } 1887 1888 if (!capable(CAP_NET_RAW)) { 1889 uf.type_mask &= hci_sec_filter.type_mask; 1890 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0); 1891 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1); 1892 } 1893 1894 { 1895 struct hci_filter *f = &hci_pi(sk)->filter; 1896 1897 f->type_mask = uf.type_mask; 1898 f->opcode = uf.opcode; 1899 *((u32 *) f->event_mask + 0) = uf.event_mask[0]; 1900 *((u32 *) f->event_mask + 1) = uf.event_mask[1]; 1901 } 1902 break; 1903 1904 default: 1905 err = -ENOPROTOOPT; 1906 break; 1907 } 1908 1909 done: 1910 release_sock(sk); 1911 return err; 1912 } 1913 1914 static int hci_sock_setsockopt(struct socket *sock, int level, int optname, 1915 sockptr_t optval, unsigned int len) 1916 { 1917 struct sock *sk = sock->sk; 1918 int err = 0, opt = 0; 1919 1920 BT_DBG("sk %p, opt %d", sk, optname); 1921 1922 if (level == SOL_HCI) 1923 return hci_sock_setsockopt_old(sock, level, optname, optval, 1924 len); 1925 1926 if (level != SOL_BLUETOOTH) 1927 return -ENOPROTOOPT; 1928 1929 lock_sock(sk); 1930 1931 switch (optname) { 1932 case BT_SNDMTU: 1933 case BT_RCVMTU: 1934 switch (hci_pi(sk)->channel) { 1935 /* Don't allow changing MTU for channels that are meant for HCI 1936 * traffic only. 1937 */ 1938 case HCI_CHANNEL_RAW: 1939 case HCI_CHANNEL_USER: 1940 err = -ENOPROTOOPT; 1941 goto done; 1942 } 1943 1944 if (copy_from_sockptr(&opt, optval, sizeof(u16))) { 1945 err = -EFAULT; 1946 break; 1947 } 1948 1949 hci_pi(sk)->mtu = opt; 1950 break; 1951 1952 default: 1953 err = -ENOPROTOOPT; 1954 break; 1955 } 1956 1957 done: 1958 release_sock(sk); 1959 return err; 1960 } 1961 1962 static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname, 1963 char __user *optval, int __user *optlen) 1964 { 1965 struct hci_ufilter uf; 1966 struct sock *sk = sock->sk; 1967 int len, opt, err = 0; 1968 1969 BT_DBG("sk %p, opt %d", sk, optname); 1970 1971 if (get_user(len, optlen)) 1972 return -EFAULT; 1973 1974 lock_sock(sk); 1975 1976 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { 1977 err = -EBADFD; 1978 goto done; 1979 } 1980 1981 switch (optname) { 1982 case HCI_DATA_DIR: 1983 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR) 1984 opt = 1; 1985 else 1986 opt = 0; 1987 1988 if (put_user(opt, optval)) 1989 err = -EFAULT; 1990 break; 1991 1992 case HCI_TIME_STAMP: 1993 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP) 1994 opt = 1; 1995 else 1996 opt = 0; 1997 1998 if (put_user(opt, optval)) 1999 err = -EFAULT; 2000 break; 2001 2002 case HCI_FILTER: 2003 { 2004 struct hci_filter *f = &hci_pi(sk)->filter; 2005 2006 memset(&uf, 0, sizeof(uf)); 2007 uf.type_mask = f->type_mask; 2008 uf.opcode = f->opcode; 2009 uf.event_mask[0] = *((u32 *) f->event_mask + 0); 2010 uf.event_mask[1] = *((u32 *) f->event_mask + 1); 2011 } 2012 2013 len = min_t(unsigned int, len, sizeof(uf)); 2014 if (copy_to_user(optval, &uf, len)) 2015 err = -EFAULT; 2016 break; 2017 2018 default: 2019 err = -ENOPROTOOPT; 2020 break; 2021 } 2022 2023 done: 2024 release_sock(sk); 2025 return err; 2026 } 2027 2028 static int hci_sock_getsockopt(struct socket *sock, int level, int optname, 2029 char __user *optval, int __user *optlen) 2030 { 2031 struct sock *sk = sock->sk; 2032 int err = 0; 2033 2034 BT_DBG("sk %p, opt %d", sk, optname); 2035 2036 if (level == SOL_HCI) 2037 return hci_sock_getsockopt_old(sock, level, optname, optval, 2038 optlen); 2039 2040 if (level != SOL_BLUETOOTH) 2041 return -ENOPROTOOPT; 2042 2043 lock_sock(sk); 2044 2045 switch (optname) { 2046 case BT_SNDMTU: 2047 case BT_RCVMTU: 2048 if (put_user(hci_pi(sk)->mtu, (u16 __user *)optval)) 2049 err = -EFAULT; 2050 break; 2051 2052 default: 2053 err = -ENOPROTOOPT; 2054 break; 2055 } 2056 2057 release_sock(sk); 2058 return err; 2059 } 2060 2061 static const struct proto_ops hci_sock_ops = { 2062 .family = PF_BLUETOOTH, 2063 .owner = THIS_MODULE, 2064 .release = hci_sock_release, 2065 .bind = hci_sock_bind, 2066 .getname = hci_sock_getname, 2067 .sendmsg = hci_sock_sendmsg, 2068 .recvmsg = hci_sock_recvmsg, 2069 .ioctl = hci_sock_ioctl, 2070 #ifdef CONFIG_COMPAT 2071 .compat_ioctl = hci_sock_compat_ioctl, 2072 #endif 2073 .poll = datagram_poll, 2074 .listen = sock_no_listen, 2075 .shutdown = sock_no_shutdown, 2076 .setsockopt = hci_sock_setsockopt, 2077 .getsockopt = hci_sock_getsockopt, 2078 .connect = sock_no_connect, 2079 .socketpair = sock_no_socketpair, 2080 .accept = sock_no_accept, 2081 .mmap = sock_no_mmap 2082 }; 2083 2084 static struct proto hci_sk_proto = { 2085 .name = "HCI", 2086 .owner = THIS_MODULE, 2087 .obj_size = sizeof(struct hci_pinfo) 2088 }; 2089 2090 static int hci_sock_create(struct net *net, struct socket *sock, int protocol, 2091 int kern) 2092 { 2093 struct sock *sk; 2094 2095 BT_DBG("sock %p", sock); 2096 2097 if (sock->type != SOCK_RAW) 2098 return -ESOCKTNOSUPPORT; 2099 2100 sock->ops = &hci_sock_ops; 2101 2102 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern); 2103 if (!sk) 2104 return -ENOMEM; 2105 2106 sock_init_data(sock, sk); 2107 2108 sock_reset_flag(sk, SOCK_ZAPPED); 2109 2110 sk->sk_protocol = protocol; 2111 2112 sock->state = SS_UNCONNECTED; 2113 sk->sk_state = BT_OPEN; 2114 2115 bt_sock_link(&hci_sk_list, sk); 2116 return 0; 2117 } 2118 2119 static const struct net_proto_family hci_sock_family_ops = { 2120 .family = PF_BLUETOOTH, 2121 .owner = THIS_MODULE, 2122 .create = hci_sock_create, 2123 }; 2124 2125 int __init hci_sock_init(void) 2126 { 2127 int err; 2128 2129 BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr)); 2130 2131 err = proto_register(&hci_sk_proto, 0); 2132 if (err < 0) 2133 return err; 2134 2135 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops); 2136 if (err < 0) { 2137 BT_ERR("HCI socket registration failed"); 2138 goto error; 2139 } 2140 2141 err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL); 2142 if (err < 0) { 2143 BT_ERR("Failed to create HCI proc file"); 2144 bt_sock_unregister(BTPROTO_HCI); 2145 goto error; 2146 } 2147 2148 BT_INFO("HCI socket layer initialized"); 2149 2150 return 0; 2151 2152 error: 2153 proto_unregister(&hci_sk_proto); 2154 return err; 2155 } 2156 2157 void hci_sock_cleanup(void) 2158 { 2159 bt_procfs_cleanup(&init_net, "hci"); 2160 bt_sock_unregister(BTPROTO_HCI); 2161 proto_unregister(&hci_sk_proto); 2162 } 2163