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 !hci_dev_test_flag(hdev, HCI_UNREGISTER)) { 874 /* When releasing a user channel exclusive access, 875 * call hci_dev_do_close directly instead of calling 876 * hci_dev_close to ensure the exclusive access will 877 * be released and the controller brought back down. 878 * 879 * The checking of HCI_AUTO_OFF is not needed in this 880 * case since it will have been cleared already when 881 * opening the user channel. 882 * 883 * Make sure to also check that we haven't already 884 * unregistered since all the cleanup will have already 885 * been complete and hdev will get released when we put 886 * below. 887 */ 888 hci_dev_do_close(hdev); 889 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); 890 mgmt_index_added(hdev); 891 } 892 893 atomic_dec(&hdev->promisc); 894 hci_dev_put(hdev); 895 } 896 897 sock_orphan(sk); 898 release_sock(sk); 899 sock_put(sk); 900 return 0; 901 } 902 903 static int hci_sock_reject_list_add(struct hci_dev *hdev, void __user *arg) 904 { 905 bdaddr_t bdaddr; 906 int err; 907 908 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) 909 return -EFAULT; 910 911 hci_dev_lock(hdev); 912 913 err = hci_bdaddr_list_add(&hdev->reject_list, &bdaddr, BDADDR_BREDR); 914 915 hci_dev_unlock(hdev); 916 917 return err; 918 } 919 920 static int hci_sock_reject_list_del(struct hci_dev *hdev, void __user *arg) 921 { 922 bdaddr_t bdaddr; 923 int err; 924 925 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr))) 926 return -EFAULT; 927 928 hci_dev_lock(hdev); 929 930 err = hci_bdaddr_list_del(&hdev->reject_list, &bdaddr, BDADDR_BREDR); 931 932 hci_dev_unlock(hdev); 933 934 return err; 935 } 936 937 /* Ioctls that require bound socket */ 938 static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, 939 unsigned long arg) 940 { 941 struct hci_dev *hdev = hci_hdev_from_sock(sk); 942 943 if (IS_ERR(hdev)) 944 return PTR_ERR(hdev); 945 946 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) 947 return -EBUSY; 948 949 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) 950 return -EOPNOTSUPP; 951 952 if (hdev->dev_type != HCI_PRIMARY) 953 return -EOPNOTSUPP; 954 955 switch (cmd) { 956 case HCISETRAW: 957 if (!capable(CAP_NET_ADMIN)) 958 return -EPERM; 959 return -EOPNOTSUPP; 960 961 case HCIGETCONNINFO: 962 return hci_get_conn_info(hdev, (void __user *)arg); 963 964 case HCIGETAUTHINFO: 965 return hci_get_auth_info(hdev, (void __user *)arg); 966 967 case HCIBLOCKADDR: 968 if (!capable(CAP_NET_ADMIN)) 969 return -EPERM; 970 return hci_sock_reject_list_add(hdev, (void __user *)arg); 971 972 case HCIUNBLOCKADDR: 973 if (!capable(CAP_NET_ADMIN)) 974 return -EPERM; 975 return hci_sock_reject_list_del(hdev, (void __user *)arg); 976 } 977 978 return -ENOIOCTLCMD; 979 } 980 981 static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, 982 unsigned long arg) 983 { 984 void __user *argp = (void __user *)arg; 985 struct sock *sk = sock->sk; 986 int err; 987 988 BT_DBG("cmd %x arg %lx", cmd, arg); 989 990 lock_sock(sk); 991 992 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { 993 err = -EBADFD; 994 goto done; 995 } 996 997 /* When calling an ioctl on an unbound raw socket, then ensure 998 * that the monitor gets informed. Ensure that the resulting event 999 * is only send once by checking if the cookie exists or not. The 1000 * socket cookie will be only ever generated once for the lifetime 1001 * of a given socket. 1002 */ 1003 if (hci_sock_gen_cookie(sk)) { 1004 struct sk_buff *skb; 1005 1006 if (capable(CAP_NET_ADMIN)) 1007 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); 1008 1009 /* Send event to monitor */ 1010 skb = create_monitor_ctrl_open(sk); 1011 if (skb) { 1012 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1013 HCI_SOCK_TRUSTED, NULL); 1014 kfree_skb(skb); 1015 } 1016 } 1017 1018 release_sock(sk); 1019 1020 switch (cmd) { 1021 case HCIGETDEVLIST: 1022 return hci_get_dev_list(argp); 1023 1024 case HCIGETDEVINFO: 1025 return hci_get_dev_info(argp); 1026 1027 case HCIGETCONNLIST: 1028 return hci_get_conn_list(argp); 1029 1030 case HCIDEVUP: 1031 if (!capable(CAP_NET_ADMIN)) 1032 return -EPERM; 1033 return hci_dev_open(arg); 1034 1035 case HCIDEVDOWN: 1036 if (!capable(CAP_NET_ADMIN)) 1037 return -EPERM; 1038 return hci_dev_close(arg); 1039 1040 case HCIDEVRESET: 1041 if (!capable(CAP_NET_ADMIN)) 1042 return -EPERM; 1043 return hci_dev_reset(arg); 1044 1045 case HCIDEVRESTAT: 1046 if (!capable(CAP_NET_ADMIN)) 1047 return -EPERM; 1048 return hci_dev_reset_stat(arg); 1049 1050 case HCISETSCAN: 1051 case HCISETAUTH: 1052 case HCISETENCRYPT: 1053 case HCISETPTYPE: 1054 case HCISETLINKPOL: 1055 case HCISETLINKMODE: 1056 case HCISETACLMTU: 1057 case HCISETSCOMTU: 1058 if (!capable(CAP_NET_ADMIN)) 1059 return -EPERM; 1060 return hci_dev_cmd(cmd, argp); 1061 1062 case HCIINQUIRY: 1063 return hci_inquiry(argp); 1064 } 1065 1066 lock_sock(sk); 1067 1068 err = hci_sock_bound_ioctl(sk, cmd, arg); 1069 1070 done: 1071 release_sock(sk); 1072 return err; 1073 } 1074 1075 #ifdef CONFIG_COMPAT 1076 static int hci_sock_compat_ioctl(struct socket *sock, unsigned int cmd, 1077 unsigned long arg) 1078 { 1079 switch (cmd) { 1080 case HCIDEVUP: 1081 case HCIDEVDOWN: 1082 case HCIDEVRESET: 1083 case HCIDEVRESTAT: 1084 return hci_sock_ioctl(sock, cmd, arg); 1085 } 1086 1087 return hci_sock_ioctl(sock, cmd, (unsigned long)compat_ptr(arg)); 1088 } 1089 #endif 1090 1091 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, 1092 int addr_len) 1093 { 1094 struct sockaddr_hci haddr; 1095 struct sock *sk = sock->sk; 1096 struct hci_dev *hdev = NULL; 1097 struct sk_buff *skb; 1098 int len, err = 0; 1099 1100 BT_DBG("sock %p sk %p", sock, sk); 1101 1102 if (!addr) 1103 return -EINVAL; 1104 1105 memset(&haddr, 0, sizeof(haddr)); 1106 len = min_t(unsigned int, sizeof(haddr), addr_len); 1107 memcpy(&haddr, addr, len); 1108 1109 if (haddr.hci_family != AF_BLUETOOTH) 1110 return -EINVAL; 1111 1112 lock_sock(sk); 1113 1114 /* Allow detaching from dead device and attaching to alive device, if 1115 * the caller wants to re-bind (instead of close) this socket in 1116 * response to hci_sock_dev_event(HCI_DEV_UNREG) notification. 1117 */ 1118 hdev = hci_pi(sk)->hdev; 1119 if (hdev && hci_dev_test_flag(hdev, HCI_UNREGISTER)) { 1120 hci_pi(sk)->hdev = NULL; 1121 sk->sk_state = BT_OPEN; 1122 hci_dev_put(hdev); 1123 } 1124 hdev = NULL; 1125 1126 if (sk->sk_state == BT_BOUND) { 1127 err = -EALREADY; 1128 goto done; 1129 } 1130 1131 switch (haddr.hci_channel) { 1132 case HCI_CHANNEL_RAW: 1133 if (hci_pi(sk)->hdev) { 1134 err = -EALREADY; 1135 goto done; 1136 } 1137 1138 if (haddr.hci_dev != HCI_DEV_NONE) { 1139 hdev = hci_dev_get(haddr.hci_dev); 1140 if (!hdev) { 1141 err = -ENODEV; 1142 goto done; 1143 } 1144 1145 atomic_inc(&hdev->promisc); 1146 } 1147 1148 hci_pi(sk)->channel = haddr.hci_channel; 1149 1150 if (!hci_sock_gen_cookie(sk)) { 1151 /* In the case when a cookie has already been assigned, 1152 * then there has been already an ioctl issued against 1153 * an unbound socket and with that triggered an open 1154 * notification. Send a close notification first to 1155 * allow the state transition to bounded. 1156 */ 1157 skb = create_monitor_ctrl_close(sk); 1158 if (skb) { 1159 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1160 HCI_SOCK_TRUSTED, NULL); 1161 kfree_skb(skb); 1162 } 1163 } 1164 1165 if (capable(CAP_NET_ADMIN)) 1166 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); 1167 1168 hci_pi(sk)->hdev = hdev; 1169 1170 /* Send event to monitor */ 1171 skb = create_monitor_ctrl_open(sk); 1172 if (skb) { 1173 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1174 HCI_SOCK_TRUSTED, NULL); 1175 kfree_skb(skb); 1176 } 1177 break; 1178 1179 case HCI_CHANNEL_USER: 1180 if (hci_pi(sk)->hdev) { 1181 err = -EALREADY; 1182 goto done; 1183 } 1184 1185 if (haddr.hci_dev == HCI_DEV_NONE) { 1186 err = -EINVAL; 1187 goto done; 1188 } 1189 1190 if (!capable(CAP_NET_ADMIN)) { 1191 err = -EPERM; 1192 goto done; 1193 } 1194 1195 hdev = hci_dev_get(haddr.hci_dev); 1196 if (!hdev) { 1197 err = -ENODEV; 1198 goto done; 1199 } 1200 1201 if (test_bit(HCI_INIT, &hdev->flags) || 1202 hci_dev_test_flag(hdev, HCI_SETUP) || 1203 hci_dev_test_flag(hdev, HCI_CONFIG) || 1204 (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) && 1205 test_bit(HCI_UP, &hdev->flags))) { 1206 err = -EBUSY; 1207 hci_dev_put(hdev); 1208 goto done; 1209 } 1210 1211 if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) { 1212 err = -EUSERS; 1213 hci_dev_put(hdev); 1214 goto done; 1215 } 1216 1217 mgmt_index_removed(hdev); 1218 1219 err = hci_dev_open(hdev->id); 1220 if (err) { 1221 if (err == -EALREADY) { 1222 /* In case the transport is already up and 1223 * running, clear the error here. 1224 * 1225 * This can happen when opening a user 1226 * channel and HCI_AUTO_OFF grace period 1227 * is still active. 1228 */ 1229 err = 0; 1230 } else { 1231 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL); 1232 mgmt_index_added(hdev); 1233 hci_dev_put(hdev); 1234 goto done; 1235 } 1236 } 1237 1238 hci_pi(sk)->channel = haddr.hci_channel; 1239 1240 if (!hci_sock_gen_cookie(sk)) { 1241 /* In the case when a cookie has already been assigned, 1242 * this socket will transition from a raw socket into 1243 * a user channel socket. For a clean transition, send 1244 * the close notification first. 1245 */ 1246 skb = create_monitor_ctrl_close(sk); 1247 if (skb) { 1248 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1249 HCI_SOCK_TRUSTED, NULL); 1250 kfree_skb(skb); 1251 } 1252 } 1253 1254 /* The user channel is restricted to CAP_NET_ADMIN 1255 * capabilities and with that implicitly trusted. 1256 */ 1257 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); 1258 1259 hci_pi(sk)->hdev = hdev; 1260 1261 /* Send event to monitor */ 1262 skb = create_monitor_ctrl_open(sk); 1263 if (skb) { 1264 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1265 HCI_SOCK_TRUSTED, NULL); 1266 kfree_skb(skb); 1267 } 1268 1269 atomic_inc(&hdev->promisc); 1270 break; 1271 1272 case HCI_CHANNEL_MONITOR: 1273 if (haddr.hci_dev != HCI_DEV_NONE) { 1274 err = -EINVAL; 1275 goto done; 1276 } 1277 1278 if (!capable(CAP_NET_RAW)) { 1279 err = -EPERM; 1280 goto done; 1281 } 1282 1283 hci_pi(sk)->channel = haddr.hci_channel; 1284 1285 /* The monitor interface is restricted to CAP_NET_RAW 1286 * capabilities and with that implicitly trusted. 1287 */ 1288 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); 1289 1290 send_monitor_note(sk, "Linux version %s (%s)", 1291 init_utsname()->release, 1292 init_utsname()->machine); 1293 send_monitor_note(sk, "Bluetooth subsystem version %u.%u", 1294 BT_SUBSYS_VERSION, BT_SUBSYS_REVISION); 1295 send_monitor_replay(sk); 1296 send_monitor_control_replay(sk); 1297 1298 atomic_inc(&monitor_promisc); 1299 break; 1300 1301 case HCI_CHANNEL_LOGGING: 1302 if (haddr.hci_dev != HCI_DEV_NONE) { 1303 err = -EINVAL; 1304 goto done; 1305 } 1306 1307 if (!capable(CAP_NET_ADMIN)) { 1308 err = -EPERM; 1309 goto done; 1310 } 1311 1312 hci_pi(sk)->channel = haddr.hci_channel; 1313 break; 1314 1315 default: 1316 if (!hci_mgmt_chan_find(haddr.hci_channel)) { 1317 err = -EINVAL; 1318 goto done; 1319 } 1320 1321 if (haddr.hci_dev != HCI_DEV_NONE) { 1322 err = -EINVAL; 1323 goto done; 1324 } 1325 1326 /* Users with CAP_NET_ADMIN capabilities are allowed 1327 * access to all management commands and events. For 1328 * untrusted users the interface is restricted and 1329 * also only untrusted events are sent. 1330 */ 1331 if (capable(CAP_NET_ADMIN)) 1332 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED); 1333 1334 hci_pi(sk)->channel = haddr.hci_channel; 1335 1336 /* At the moment the index and unconfigured index events 1337 * are enabled unconditionally. Setting them on each 1338 * socket when binding keeps this functionality. They 1339 * however might be cleared later and then sending of these 1340 * events will be disabled, but that is then intentional. 1341 * 1342 * This also enables generic events that are safe to be 1343 * received by untrusted users. Example for such events 1344 * are changes to settings, class of device, name etc. 1345 */ 1346 if (hci_pi(sk)->channel == HCI_CHANNEL_CONTROL) { 1347 if (!hci_sock_gen_cookie(sk)) { 1348 /* In the case when a cookie has already been 1349 * assigned, this socket will transition from 1350 * a raw socket into a control socket. To 1351 * allow for a clean transition, send the 1352 * close notification first. 1353 */ 1354 skb = create_monitor_ctrl_close(sk); 1355 if (skb) { 1356 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1357 HCI_SOCK_TRUSTED, NULL); 1358 kfree_skb(skb); 1359 } 1360 } 1361 1362 /* Send event to monitor */ 1363 skb = create_monitor_ctrl_open(sk); 1364 if (skb) { 1365 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, 1366 HCI_SOCK_TRUSTED, NULL); 1367 kfree_skb(skb); 1368 } 1369 1370 hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS); 1371 hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS); 1372 hci_sock_set_flag(sk, HCI_MGMT_OPTION_EVENTS); 1373 hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS); 1374 hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS); 1375 hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS); 1376 } 1377 break; 1378 } 1379 1380 /* Default MTU to HCI_MAX_FRAME_SIZE if not set */ 1381 if (!hci_pi(sk)->mtu) 1382 hci_pi(sk)->mtu = HCI_MAX_FRAME_SIZE; 1383 1384 sk->sk_state = BT_BOUND; 1385 1386 done: 1387 release_sock(sk); 1388 return err; 1389 } 1390 1391 static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, 1392 int peer) 1393 { 1394 struct sockaddr_hci *haddr = (struct sockaddr_hci *)addr; 1395 struct sock *sk = sock->sk; 1396 struct hci_dev *hdev; 1397 int err = 0; 1398 1399 BT_DBG("sock %p sk %p", sock, sk); 1400 1401 if (peer) 1402 return -EOPNOTSUPP; 1403 1404 lock_sock(sk); 1405 1406 hdev = hci_hdev_from_sock(sk); 1407 if (IS_ERR(hdev)) { 1408 err = PTR_ERR(hdev); 1409 goto done; 1410 } 1411 1412 haddr->hci_family = AF_BLUETOOTH; 1413 haddr->hci_dev = hdev->id; 1414 haddr->hci_channel= hci_pi(sk)->channel; 1415 err = sizeof(*haddr); 1416 1417 done: 1418 release_sock(sk); 1419 return err; 1420 } 1421 1422 static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, 1423 struct sk_buff *skb) 1424 { 1425 __u8 mask = hci_pi(sk)->cmsg_mask; 1426 1427 if (mask & HCI_CMSG_DIR) { 1428 int incoming = bt_cb(skb)->incoming; 1429 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), 1430 &incoming); 1431 } 1432 1433 if (mask & HCI_CMSG_TSTAMP) { 1434 #ifdef CONFIG_COMPAT 1435 struct old_timeval32 ctv; 1436 #endif 1437 struct __kernel_old_timeval tv; 1438 void *data; 1439 int len; 1440 1441 skb_get_timestamp(skb, &tv); 1442 1443 data = &tv; 1444 len = sizeof(tv); 1445 #ifdef CONFIG_COMPAT 1446 if (!COMPAT_USE_64BIT_TIME && 1447 (msg->msg_flags & MSG_CMSG_COMPAT)) { 1448 ctv.tv_sec = tv.tv_sec; 1449 ctv.tv_usec = tv.tv_usec; 1450 data = &ctv; 1451 len = sizeof(ctv); 1452 } 1453 #endif 1454 1455 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data); 1456 } 1457 } 1458 1459 static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg, 1460 size_t len, int flags) 1461 { 1462 struct sock *sk = sock->sk; 1463 struct sk_buff *skb; 1464 int copied, err; 1465 unsigned int skblen; 1466 1467 BT_DBG("sock %p, sk %p", sock, sk); 1468 1469 if (flags & MSG_OOB) 1470 return -EOPNOTSUPP; 1471 1472 if (hci_pi(sk)->channel == HCI_CHANNEL_LOGGING) 1473 return -EOPNOTSUPP; 1474 1475 if (sk->sk_state == BT_CLOSED) 1476 return 0; 1477 1478 skb = skb_recv_datagram(sk, flags, &err); 1479 if (!skb) 1480 return err; 1481 1482 skblen = skb->len; 1483 copied = skb->len; 1484 if (len < copied) { 1485 msg->msg_flags |= MSG_TRUNC; 1486 copied = len; 1487 } 1488 1489 skb_reset_transport_header(skb); 1490 err = skb_copy_datagram_msg(skb, 0, msg, copied); 1491 1492 switch (hci_pi(sk)->channel) { 1493 case HCI_CHANNEL_RAW: 1494 hci_sock_cmsg(sk, msg, skb); 1495 break; 1496 case HCI_CHANNEL_USER: 1497 case HCI_CHANNEL_MONITOR: 1498 sock_recv_timestamp(msg, sk, skb); 1499 break; 1500 default: 1501 if (hci_mgmt_chan_find(hci_pi(sk)->channel)) 1502 sock_recv_timestamp(msg, sk, skb); 1503 break; 1504 } 1505 1506 skb_free_datagram(sk, skb); 1507 1508 if (flags & MSG_TRUNC) 1509 copied = skblen; 1510 1511 return err ? : copied; 1512 } 1513 1514 static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk, 1515 struct sk_buff *skb) 1516 { 1517 u8 *cp; 1518 struct mgmt_hdr *hdr; 1519 u16 opcode, index, len; 1520 struct hci_dev *hdev = NULL; 1521 const struct hci_mgmt_handler *handler; 1522 bool var_len, no_hdev; 1523 int err; 1524 1525 BT_DBG("got %d bytes", skb->len); 1526 1527 if (skb->len < sizeof(*hdr)) 1528 return -EINVAL; 1529 1530 hdr = (void *)skb->data; 1531 opcode = __le16_to_cpu(hdr->opcode); 1532 index = __le16_to_cpu(hdr->index); 1533 len = __le16_to_cpu(hdr->len); 1534 1535 if (len != skb->len - sizeof(*hdr)) { 1536 err = -EINVAL; 1537 goto done; 1538 } 1539 1540 if (chan->channel == HCI_CHANNEL_CONTROL) { 1541 struct sk_buff *cmd; 1542 1543 /* Send event to monitor */ 1544 cmd = create_monitor_ctrl_command(sk, index, opcode, len, 1545 skb->data + sizeof(*hdr)); 1546 if (cmd) { 1547 hci_send_to_channel(HCI_CHANNEL_MONITOR, cmd, 1548 HCI_SOCK_TRUSTED, NULL); 1549 kfree_skb(cmd); 1550 } 1551 } 1552 1553 if (opcode >= chan->handler_count || 1554 chan->handlers[opcode].func == NULL) { 1555 BT_DBG("Unknown op %u", opcode); 1556 err = mgmt_cmd_status(sk, index, opcode, 1557 MGMT_STATUS_UNKNOWN_COMMAND); 1558 goto done; 1559 } 1560 1561 handler = &chan->handlers[opcode]; 1562 1563 if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) && 1564 !(handler->flags & HCI_MGMT_UNTRUSTED)) { 1565 err = mgmt_cmd_status(sk, index, opcode, 1566 MGMT_STATUS_PERMISSION_DENIED); 1567 goto done; 1568 } 1569 1570 if (index != MGMT_INDEX_NONE) { 1571 hdev = hci_dev_get(index); 1572 if (!hdev) { 1573 err = mgmt_cmd_status(sk, index, opcode, 1574 MGMT_STATUS_INVALID_INDEX); 1575 goto done; 1576 } 1577 1578 if (hci_dev_test_flag(hdev, HCI_SETUP) || 1579 hci_dev_test_flag(hdev, HCI_CONFIG) || 1580 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { 1581 err = mgmt_cmd_status(sk, index, opcode, 1582 MGMT_STATUS_INVALID_INDEX); 1583 goto done; 1584 } 1585 1586 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) && 1587 !(handler->flags & HCI_MGMT_UNCONFIGURED)) { 1588 err = mgmt_cmd_status(sk, index, opcode, 1589 MGMT_STATUS_INVALID_INDEX); 1590 goto done; 1591 } 1592 } 1593 1594 if (!(handler->flags & HCI_MGMT_HDEV_OPTIONAL)) { 1595 no_hdev = (handler->flags & HCI_MGMT_NO_HDEV); 1596 if (no_hdev != !hdev) { 1597 err = mgmt_cmd_status(sk, index, opcode, 1598 MGMT_STATUS_INVALID_INDEX); 1599 goto done; 1600 } 1601 } 1602 1603 var_len = (handler->flags & HCI_MGMT_VAR_LEN); 1604 if ((var_len && len < handler->data_len) || 1605 (!var_len && len != handler->data_len)) { 1606 err = mgmt_cmd_status(sk, index, opcode, 1607 MGMT_STATUS_INVALID_PARAMS); 1608 goto done; 1609 } 1610 1611 if (hdev && chan->hdev_init) 1612 chan->hdev_init(sk, hdev); 1613 1614 cp = skb->data + sizeof(*hdr); 1615 1616 err = handler->func(sk, hdev, cp, len); 1617 if (err < 0) 1618 goto done; 1619 1620 err = skb->len; 1621 1622 done: 1623 if (hdev) 1624 hci_dev_put(hdev); 1625 1626 return err; 1627 } 1628 1629 static int hci_logging_frame(struct sock *sk, struct sk_buff *skb, 1630 unsigned int flags) 1631 { 1632 struct hci_mon_hdr *hdr; 1633 struct hci_dev *hdev; 1634 u16 index; 1635 int err; 1636 1637 /* The logging frame consists at minimum of the standard header, 1638 * the priority byte, the ident length byte and at least one string 1639 * terminator NUL byte. Anything shorter are invalid packets. 1640 */ 1641 if (skb->len < sizeof(*hdr) + 3) 1642 return -EINVAL; 1643 1644 hdr = (void *)skb->data; 1645 1646 if (__le16_to_cpu(hdr->len) != skb->len - sizeof(*hdr)) 1647 return -EINVAL; 1648 1649 if (__le16_to_cpu(hdr->opcode) == 0x0000) { 1650 __u8 priority = skb->data[sizeof(*hdr)]; 1651 __u8 ident_len = skb->data[sizeof(*hdr) + 1]; 1652 1653 /* Only the priorities 0-7 are valid and with that any other 1654 * value results in an invalid packet. 1655 * 1656 * The priority byte is followed by an ident length byte and 1657 * the NUL terminated ident string. Check that the ident 1658 * length is not overflowing the packet and also that the 1659 * ident string itself is NUL terminated. In case the ident 1660 * length is zero, the length value actually doubles as NUL 1661 * terminator identifier. 1662 * 1663 * The message follows the ident string (if present) and 1664 * must be NUL terminated. Otherwise it is not a valid packet. 1665 */ 1666 if (priority > 7 || skb->data[skb->len - 1] != 0x00 || 1667 ident_len > skb->len - sizeof(*hdr) - 3 || 1668 skb->data[sizeof(*hdr) + ident_len + 1] != 0x00) 1669 return -EINVAL; 1670 } else { 1671 return -EINVAL; 1672 } 1673 1674 index = __le16_to_cpu(hdr->index); 1675 1676 if (index != MGMT_INDEX_NONE) { 1677 hdev = hci_dev_get(index); 1678 if (!hdev) 1679 return -ENODEV; 1680 } else { 1681 hdev = NULL; 1682 } 1683 1684 hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING); 1685 1686 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL); 1687 err = skb->len; 1688 1689 if (hdev) 1690 hci_dev_put(hdev); 1691 1692 return err; 1693 } 1694 1695 static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg, 1696 size_t len) 1697 { 1698 struct sock *sk = sock->sk; 1699 struct hci_mgmt_chan *chan; 1700 struct hci_dev *hdev; 1701 struct sk_buff *skb; 1702 int err; 1703 const unsigned int flags = msg->msg_flags; 1704 1705 BT_DBG("sock %p sk %p", sock, sk); 1706 1707 if (flags & MSG_OOB) 1708 return -EOPNOTSUPP; 1709 1710 if (flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE | MSG_CMSG_COMPAT)) 1711 return -EINVAL; 1712 1713 if (len < 4 || len > hci_pi(sk)->mtu) 1714 return -EINVAL; 1715 1716 skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0); 1717 if (IS_ERR(skb)) 1718 return PTR_ERR(skb); 1719 1720 lock_sock(sk); 1721 1722 switch (hci_pi(sk)->channel) { 1723 case HCI_CHANNEL_RAW: 1724 case HCI_CHANNEL_USER: 1725 break; 1726 case HCI_CHANNEL_MONITOR: 1727 err = -EOPNOTSUPP; 1728 goto drop; 1729 case HCI_CHANNEL_LOGGING: 1730 err = hci_logging_frame(sk, skb, flags); 1731 goto drop; 1732 default: 1733 mutex_lock(&mgmt_chan_list_lock); 1734 chan = __hci_mgmt_chan_find(hci_pi(sk)->channel); 1735 if (chan) 1736 err = hci_mgmt_cmd(chan, sk, skb); 1737 else 1738 err = -EINVAL; 1739 1740 mutex_unlock(&mgmt_chan_list_lock); 1741 goto drop; 1742 } 1743 1744 hdev = hci_hdev_from_sock(sk); 1745 if (IS_ERR(hdev)) { 1746 err = PTR_ERR(hdev); 1747 goto drop; 1748 } 1749 1750 if (!test_bit(HCI_UP, &hdev->flags)) { 1751 err = -ENETDOWN; 1752 goto drop; 1753 } 1754 1755 hci_skb_pkt_type(skb) = skb->data[0]; 1756 skb_pull(skb, 1); 1757 1758 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) { 1759 /* No permission check is needed for user channel 1760 * since that gets enforced when binding the socket. 1761 * 1762 * However check that the packet type is valid. 1763 */ 1764 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT && 1765 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT && 1766 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT && 1767 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) { 1768 err = -EINVAL; 1769 goto drop; 1770 } 1771 1772 skb_queue_tail(&hdev->raw_q, skb); 1773 queue_work(hdev->workqueue, &hdev->tx_work); 1774 } else if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT) { 1775 u16 opcode = get_unaligned_le16(skb->data); 1776 u16 ogf = hci_opcode_ogf(opcode); 1777 u16 ocf = hci_opcode_ocf(opcode); 1778 1779 if (((ogf > HCI_SFLT_MAX_OGF) || 1780 !hci_test_bit(ocf & HCI_FLT_OCF_BITS, 1781 &hci_sec_filter.ocf_mask[ogf])) && 1782 !capable(CAP_NET_RAW)) { 1783 err = -EPERM; 1784 goto drop; 1785 } 1786 1787 /* Since the opcode has already been extracted here, store 1788 * a copy of the value for later use by the drivers. 1789 */ 1790 hci_skb_opcode(skb) = opcode; 1791 1792 if (ogf == 0x3f) { 1793 skb_queue_tail(&hdev->raw_q, skb); 1794 queue_work(hdev->workqueue, &hdev->tx_work); 1795 } else { 1796 /* Stand-alone HCI commands must be flagged as 1797 * single-command requests. 1798 */ 1799 bt_cb(skb)->hci.req_flags |= HCI_REQ_START; 1800 1801 skb_queue_tail(&hdev->cmd_q, skb); 1802 queue_work(hdev->workqueue, &hdev->cmd_work); 1803 } 1804 } else { 1805 if (!capable(CAP_NET_RAW)) { 1806 err = -EPERM; 1807 goto drop; 1808 } 1809 1810 if (hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT && 1811 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT && 1812 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) { 1813 err = -EINVAL; 1814 goto drop; 1815 } 1816 1817 skb_queue_tail(&hdev->raw_q, skb); 1818 queue_work(hdev->workqueue, &hdev->tx_work); 1819 } 1820 1821 err = len; 1822 1823 done: 1824 release_sock(sk); 1825 return err; 1826 1827 drop: 1828 kfree_skb(skb); 1829 goto done; 1830 } 1831 1832 static int hci_sock_setsockopt_old(struct socket *sock, int level, int optname, 1833 sockptr_t optval, unsigned int len) 1834 { 1835 struct hci_ufilter uf = { .opcode = 0 }; 1836 struct sock *sk = sock->sk; 1837 int err = 0, opt = 0; 1838 1839 BT_DBG("sk %p, opt %d", sk, optname); 1840 1841 lock_sock(sk); 1842 1843 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { 1844 err = -EBADFD; 1845 goto done; 1846 } 1847 1848 switch (optname) { 1849 case HCI_DATA_DIR: 1850 if (copy_from_sockptr(&opt, optval, sizeof(opt))) { 1851 err = -EFAULT; 1852 break; 1853 } 1854 1855 if (opt) 1856 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR; 1857 else 1858 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR; 1859 break; 1860 1861 case HCI_TIME_STAMP: 1862 if (copy_from_sockptr(&opt, optval, sizeof(opt))) { 1863 err = -EFAULT; 1864 break; 1865 } 1866 1867 if (opt) 1868 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP; 1869 else 1870 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP; 1871 break; 1872 1873 case HCI_FILTER: 1874 { 1875 struct hci_filter *f = &hci_pi(sk)->filter; 1876 1877 uf.type_mask = f->type_mask; 1878 uf.opcode = f->opcode; 1879 uf.event_mask[0] = *((u32 *) f->event_mask + 0); 1880 uf.event_mask[1] = *((u32 *) f->event_mask + 1); 1881 } 1882 1883 len = min_t(unsigned int, len, sizeof(uf)); 1884 if (copy_from_sockptr(&uf, optval, len)) { 1885 err = -EFAULT; 1886 break; 1887 } 1888 1889 if (!capable(CAP_NET_RAW)) { 1890 uf.type_mask &= hci_sec_filter.type_mask; 1891 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0); 1892 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1); 1893 } 1894 1895 { 1896 struct hci_filter *f = &hci_pi(sk)->filter; 1897 1898 f->type_mask = uf.type_mask; 1899 f->opcode = uf.opcode; 1900 *((u32 *) f->event_mask + 0) = uf.event_mask[0]; 1901 *((u32 *) f->event_mask + 1) = uf.event_mask[1]; 1902 } 1903 break; 1904 1905 default: 1906 err = -ENOPROTOOPT; 1907 break; 1908 } 1909 1910 done: 1911 release_sock(sk); 1912 return err; 1913 } 1914 1915 static int hci_sock_setsockopt(struct socket *sock, int level, int optname, 1916 sockptr_t optval, unsigned int len) 1917 { 1918 struct sock *sk = sock->sk; 1919 int err = 0; 1920 u16 opt; 1921 1922 BT_DBG("sk %p, opt %d", sk, optname); 1923 1924 if (level == SOL_HCI) 1925 return hci_sock_setsockopt_old(sock, level, optname, optval, 1926 len); 1927 1928 if (level != SOL_BLUETOOTH) 1929 return -ENOPROTOOPT; 1930 1931 lock_sock(sk); 1932 1933 switch (optname) { 1934 case BT_SNDMTU: 1935 case BT_RCVMTU: 1936 switch (hci_pi(sk)->channel) { 1937 /* Don't allow changing MTU for channels that are meant for HCI 1938 * traffic only. 1939 */ 1940 case HCI_CHANNEL_RAW: 1941 case HCI_CHANNEL_USER: 1942 err = -ENOPROTOOPT; 1943 goto done; 1944 } 1945 1946 if (copy_from_sockptr(&opt, optval, sizeof(opt))) { 1947 err = -EFAULT; 1948 break; 1949 } 1950 1951 hci_pi(sk)->mtu = opt; 1952 break; 1953 1954 default: 1955 err = -ENOPROTOOPT; 1956 break; 1957 } 1958 1959 done: 1960 release_sock(sk); 1961 return err; 1962 } 1963 1964 static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname, 1965 char __user *optval, int __user *optlen) 1966 { 1967 struct hci_ufilter uf; 1968 struct sock *sk = sock->sk; 1969 int len, opt, err = 0; 1970 1971 BT_DBG("sk %p, opt %d", sk, optname); 1972 1973 if (get_user(len, optlen)) 1974 return -EFAULT; 1975 1976 lock_sock(sk); 1977 1978 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) { 1979 err = -EBADFD; 1980 goto done; 1981 } 1982 1983 switch (optname) { 1984 case HCI_DATA_DIR: 1985 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR) 1986 opt = 1; 1987 else 1988 opt = 0; 1989 1990 if (put_user(opt, optval)) 1991 err = -EFAULT; 1992 break; 1993 1994 case HCI_TIME_STAMP: 1995 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP) 1996 opt = 1; 1997 else 1998 opt = 0; 1999 2000 if (put_user(opt, optval)) 2001 err = -EFAULT; 2002 break; 2003 2004 case HCI_FILTER: 2005 { 2006 struct hci_filter *f = &hci_pi(sk)->filter; 2007 2008 memset(&uf, 0, sizeof(uf)); 2009 uf.type_mask = f->type_mask; 2010 uf.opcode = f->opcode; 2011 uf.event_mask[0] = *((u32 *) f->event_mask + 0); 2012 uf.event_mask[1] = *((u32 *) f->event_mask + 1); 2013 } 2014 2015 len = min_t(unsigned int, len, sizeof(uf)); 2016 if (copy_to_user(optval, &uf, len)) 2017 err = -EFAULT; 2018 break; 2019 2020 default: 2021 err = -ENOPROTOOPT; 2022 break; 2023 } 2024 2025 done: 2026 release_sock(sk); 2027 return err; 2028 } 2029 2030 static int hci_sock_getsockopt(struct socket *sock, int level, int optname, 2031 char __user *optval, int __user *optlen) 2032 { 2033 struct sock *sk = sock->sk; 2034 int err = 0; 2035 2036 BT_DBG("sk %p, opt %d", sk, optname); 2037 2038 if (level == SOL_HCI) 2039 return hci_sock_getsockopt_old(sock, level, optname, optval, 2040 optlen); 2041 2042 if (level != SOL_BLUETOOTH) 2043 return -ENOPROTOOPT; 2044 2045 lock_sock(sk); 2046 2047 switch (optname) { 2048 case BT_SNDMTU: 2049 case BT_RCVMTU: 2050 if (put_user(hci_pi(sk)->mtu, (u16 __user *)optval)) 2051 err = -EFAULT; 2052 break; 2053 2054 default: 2055 err = -ENOPROTOOPT; 2056 break; 2057 } 2058 2059 release_sock(sk); 2060 return err; 2061 } 2062 2063 static void hci_sock_destruct(struct sock *sk) 2064 { 2065 mgmt_cleanup(sk); 2066 skb_queue_purge(&sk->sk_receive_queue); 2067 skb_queue_purge(&sk->sk_write_queue); 2068 } 2069 2070 static const struct proto_ops hci_sock_ops = { 2071 .family = PF_BLUETOOTH, 2072 .owner = THIS_MODULE, 2073 .release = hci_sock_release, 2074 .bind = hci_sock_bind, 2075 .getname = hci_sock_getname, 2076 .sendmsg = hci_sock_sendmsg, 2077 .recvmsg = hci_sock_recvmsg, 2078 .ioctl = hci_sock_ioctl, 2079 #ifdef CONFIG_COMPAT 2080 .compat_ioctl = hci_sock_compat_ioctl, 2081 #endif 2082 .poll = datagram_poll, 2083 .listen = sock_no_listen, 2084 .shutdown = sock_no_shutdown, 2085 .setsockopt = hci_sock_setsockopt, 2086 .getsockopt = hci_sock_getsockopt, 2087 .connect = sock_no_connect, 2088 .socketpair = sock_no_socketpair, 2089 .accept = sock_no_accept, 2090 .mmap = sock_no_mmap 2091 }; 2092 2093 static struct proto hci_sk_proto = { 2094 .name = "HCI", 2095 .owner = THIS_MODULE, 2096 .obj_size = sizeof(struct hci_pinfo) 2097 }; 2098 2099 static int hci_sock_create(struct net *net, struct socket *sock, int protocol, 2100 int kern) 2101 { 2102 struct sock *sk; 2103 2104 BT_DBG("sock %p", sock); 2105 2106 if (sock->type != SOCK_RAW) 2107 return -ESOCKTNOSUPPORT; 2108 2109 sock->ops = &hci_sock_ops; 2110 2111 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern); 2112 if (!sk) 2113 return -ENOMEM; 2114 2115 sock_init_data(sock, sk); 2116 2117 sock_reset_flag(sk, SOCK_ZAPPED); 2118 2119 sk->sk_protocol = protocol; 2120 2121 sock->state = SS_UNCONNECTED; 2122 sk->sk_state = BT_OPEN; 2123 sk->sk_destruct = hci_sock_destruct; 2124 2125 bt_sock_link(&hci_sk_list, sk); 2126 return 0; 2127 } 2128 2129 static const struct net_proto_family hci_sock_family_ops = { 2130 .family = PF_BLUETOOTH, 2131 .owner = THIS_MODULE, 2132 .create = hci_sock_create, 2133 }; 2134 2135 int __init hci_sock_init(void) 2136 { 2137 int err; 2138 2139 BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr)); 2140 2141 err = proto_register(&hci_sk_proto, 0); 2142 if (err < 0) 2143 return err; 2144 2145 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops); 2146 if (err < 0) { 2147 BT_ERR("HCI socket registration failed"); 2148 goto error; 2149 } 2150 2151 err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL); 2152 if (err < 0) { 2153 BT_ERR("Failed to create HCI proc file"); 2154 bt_sock_unregister(BTPROTO_HCI); 2155 goto error; 2156 } 2157 2158 BT_INFO("HCI socket layer initialized"); 2159 2160 return 0; 2161 2162 error: 2163 proto_unregister(&hci_sk_proto); 2164 return err; 2165 } 2166 2167 void hci_sock_cleanup(void) 2168 { 2169 bt_procfs_cleanup(&init_net, "hci"); 2170 bt_sock_unregister(BTPROTO_HCI); 2171 proto_unregister(&hci_sk_proto); 2172 } 2173