1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * BlueZ - Bluetooth protocol stack for Linux 4 * 5 * Copyright (C) 2022 Intel Corporation 6 * Copyright 2023-2024 NXP 7 */ 8 9 #include <linux/module.h> 10 #include <linux/debugfs.h> 11 #include <linux/seq_file.h> 12 #include <linux/sched/signal.h> 13 #include <linux/uio.h> 14 15 #include <net/bluetooth/bluetooth.h> 16 #include <net/bluetooth/hci_core.h> 17 #include <net/bluetooth/iso.h> 18 #include "eir.h" 19 20 static const struct proto_ops iso_sock_ops; 21 22 static struct bt_sock_list iso_sk_list = { 23 .lock = __RW_LOCK_UNLOCKED(iso_sk_list.lock) 24 }; 25 26 /* ---- ISO connections ---- */ 27 enum { 28 ISO_CONN_DROPPED, 29 __ISO_CONN_NUM_FLAGS 30 }; 31 32 struct iso_conn { 33 struct hci_conn *hcon; 34 DECLARE_BITMAP(flags, __ISO_CONN_NUM_FLAGS); 35 36 /* @lock: spinlock protecting changes to iso_conn fields */ 37 spinlock_t lock; 38 struct sock *sk; 39 40 struct sk_buff *rx_skb; 41 __u32 rx_len; 42 __u16 tx_sn; 43 struct kref ref; 44 }; 45 46 #define iso_conn_lock(c) spin_lock(&(c)->lock) 47 #define iso_conn_unlock(c) spin_unlock(&(c)->lock) 48 49 static void iso_sock_close(struct sock *sk); 50 static void iso_sock_kill(struct sock *sk); 51 52 /* ----- ISO socket info ----- */ 53 #define iso_pi(sk) ((struct iso_pinfo *)sk) 54 55 #define EIR_SERVICE_DATA_LENGTH 4 56 #define BASE_MAX_LENGTH (HCI_MAX_PER_AD_LENGTH - EIR_SERVICE_DATA_LENGTH) 57 #define EIR_BAA_SERVICE_UUID 0x1851 58 59 /* iso_pinfo flags values */ 60 enum { 61 BT_SK_BIG_SYNC, 62 BT_SK_PA_SYNC, 63 BT_SK_KILLED, 64 }; 65 66 struct iso_pinfo { 67 struct bt_sock bt; 68 bdaddr_t src; 69 __u8 src_type; 70 bdaddr_t dst; 71 __u8 dst_type; 72 __u8 bc_sid; 73 __u8 bc_num_bis; 74 __u8 bc_bis[ISO_MAX_NUM_BIS]; 75 __u16 sync_handle; 76 unsigned long flags; 77 struct bt_iso_qos qos; 78 bool qos_user_set; 79 __u8 base_len; 80 __u8 base[BASE_MAX_LENGTH]; 81 struct iso_conn *conn; 82 struct delayed_work timeout_work; 83 }; 84 85 static struct bt_iso_qos default_qos; 86 87 static bool check_ucast_qos(struct bt_iso_qos *qos); 88 static bool check_bcast_qos(struct bt_iso_qos *qos); 89 static bool iso_match_sid(struct sock *sk, void *data); 90 static bool iso_match_sid_past(struct sock *sk, void *data); 91 static bool iso_match_sync_handle(struct sock *sk, void *data); 92 static bool iso_match_sync_handle_pa_report(struct sock *sk, void *data); 93 static void iso_sock_disconn(struct sock *sk); 94 95 typedef bool (*iso_sock_match_t)(struct sock *sk, void *data); 96 97 static struct sock *iso_get_sock(struct hci_dev *hdev, bdaddr_t *src, 98 bdaddr_t *dst, enum bt_sock_state state, 99 iso_sock_match_t match, void *data); 100 101 /* ---- ISO timers ---- */ 102 #define ISO_CONN_TIMEOUT secs_to_jiffies(20) 103 #define ISO_DISCONN_TIMEOUT secs_to_jiffies(2) 104 105 static void iso_conn_free(struct kref *ref) 106 { 107 struct iso_conn *conn = container_of(ref, struct iso_conn, ref); 108 109 BT_DBG("conn %p", conn); 110 111 if (conn->hcon) { 112 spin_lock(&conn->hcon->proto_lock); 113 114 /* Check we are not racing with iso_conn_add */ 115 if (conn->hcon->iso_data == conn) { 116 conn->hcon->iso_data = NULL; 117 if (!test_and_set_bit(ISO_CONN_DROPPED, conn->flags)) 118 hci_conn_drop(conn->hcon); 119 } 120 121 spin_unlock(&conn->hcon->proto_lock); 122 } 123 124 kfree_skb(conn->rx_skb); 125 126 kfree(conn); 127 } 128 129 static void iso_conn_put(struct iso_conn *conn) 130 { 131 if (!conn) 132 return; 133 134 BT_DBG("conn %p refcnt %d", conn, kref_read(&conn->ref)); 135 136 /* The following race vs. iso_conn_del() is possible: 137 * 138 * 1. conn->hcon != NULL here 139 * 2. kref_put puts the last reference 140 * 3. concurrent iso_conn_del() gets iso_conn_hold_unless_zero() -> NULL 141 * and returns immediately, so conn->hcon is not cleared 142 * 4. iso_conn_free() dereferences conn->hcon 143 * 144 * To avoid UAF in step 4, take RCU before decrementing the refcount. 145 */ 146 rcu_read_lock(); 147 148 kref_put(&conn->ref, iso_conn_free); 149 150 rcu_read_unlock(); 151 } 152 153 static struct iso_conn *iso_conn_hold_unless_zero(struct iso_conn *conn) 154 { 155 if (!conn) 156 return NULL; 157 158 BT_DBG("conn %p refcnt %u", conn, kref_read(&conn->ref)); 159 160 if (!kref_get_unless_zero(&conn->ref)) 161 return NULL; 162 163 return conn; 164 } 165 166 static struct iso_conn *iso_conn_hold(struct iso_conn *conn) 167 { 168 BT_DBG("conn %p refcnt %u", conn, kref_read(&conn->ref)); 169 170 kref_get(&conn->ref); 171 return conn; 172 } 173 174 static struct sock *iso_sock_hold(struct iso_conn *conn) 175 { 176 if (!conn || !bt_sock_linked(&iso_sk_list, conn->sk)) 177 return NULL; 178 179 sock_hold(conn->sk); 180 181 return conn->sk; 182 } 183 184 static void iso_sock_timeout(struct work_struct *work) 185 { 186 struct iso_pinfo *pi = container_of(work, struct iso_pinfo, 187 timeout_work.work); 188 struct sock *sk = &pi->bt.sk; 189 190 BT_DBG("sock %p state %d", sk, sk->sk_state); 191 192 lock_sock(sk); 193 if (!sock_flag(sk, SOCK_ZAPPED)) { 194 sk->sk_err = ETIMEDOUT; 195 sk->sk_state_change(sk); 196 } 197 release_sock(sk); 198 } 199 200 static void iso_sock_set_timer(struct sock *sk, long timeout) 201 { 202 lockdep_assert(lockdep_sock_is_held(sk)); 203 204 cancel_delayed_work(&iso_pi(sk)->timeout_work); 205 206 if (!iso_pi(sk)->conn) 207 return; 208 209 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout); 210 schedule_delayed_work(&iso_pi(sk)->timeout_work, timeout); 211 } 212 213 static void iso_sock_clear_timer(struct sock *sk) 214 { 215 BT_DBG("sock %p state %d", sk, sk->sk_state); 216 cancel_delayed_work(&iso_pi(sk)->timeout_work); 217 } 218 219 static void iso_sock_disable_timer(struct sock *sk) 220 { 221 lockdep_assert(!lockdep_sock_is_held(sk)); 222 223 BT_DBG("sock %p state %d", sk, sk->sk_state); 224 disable_delayed_work_sync(&iso_pi(sk)->timeout_work); 225 } 226 227 /* ---- ISO connections ---- */ 228 static struct iso_conn *iso_conn_add(struct hci_conn *hcon) 229 __must_hold(&hcon->hdev->lock) 230 { 231 struct iso_conn *conn; 232 233 spin_lock(&hcon->proto_lock); 234 235 conn = iso_conn_hold_unless_zero(hcon->iso_data); 236 if (conn) { 237 if (!conn->hcon) { 238 iso_conn_lock(conn); 239 conn->hcon = hcon; 240 iso_conn_unlock(conn); 241 } 242 spin_unlock(&hcon->proto_lock); 243 return conn; 244 } 245 246 conn = kzalloc_obj(*conn, GFP_ATOMIC); 247 if (!conn) { 248 spin_unlock(&hcon->proto_lock); 249 return NULL; 250 } 251 252 kref_init(&conn->ref); 253 spin_lock_init(&conn->lock); 254 255 hcon->iso_data = conn; 256 conn->hcon = hcon; 257 conn->tx_sn = 0; 258 259 spin_unlock(&hcon->proto_lock); 260 261 BT_DBG("hcon %p conn %p", hcon, conn); 262 263 return conn; 264 } 265 266 /* Delete channel. Must be called on the locked socket. */ 267 static void iso_chan_del(struct sock *sk, int err) 268 { 269 struct iso_conn *conn; 270 struct sock *parent; 271 272 conn = iso_pi(sk)->conn; 273 iso_pi(sk)->conn = NULL; 274 275 BT_DBG("sk %p, conn %p, err %d", sk, conn, err); 276 277 if (conn) { 278 iso_conn_lock(conn); 279 conn->sk = NULL; 280 iso_conn_unlock(conn); 281 iso_conn_put(conn); 282 } 283 284 sk->sk_state = BT_CLOSED; 285 sk->sk_err = err; 286 287 parent = bt_sk(sk)->parent; 288 if (parent) { 289 bt_accept_unlink(sk); 290 parent->sk_data_ready(parent); 291 } else { 292 sk->sk_state_change(sk); 293 } 294 295 sock_set_flag(sk, SOCK_ZAPPED); 296 } 297 298 static void iso_conn_del(struct hci_conn *hcon, int err) 299 __must_hold(&hcon->hdev->lock) 300 { 301 struct iso_conn *conn; 302 struct sock *sk; 303 304 spin_lock(&hcon->proto_lock); 305 conn = iso_conn_hold_unless_zero(hcon->iso_data); 306 spin_unlock(&hcon->proto_lock); 307 if (!conn) 308 return; 309 310 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); 311 312 /* Kill socket */ 313 iso_conn_lock(conn); 314 sk = iso_sock_hold(conn); 315 iso_conn_unlock(conn); 316 317 if (!sk) 318 goto done; 319 320 iso_sock_disable_timer(sk); 321 322 lock_sock(sk); 323 iso_chan_del(sk, err); 324 release_sock(sk); 325 iso_sock_kill(sk); 326 sock_put(sk); 327 328 done: 329 /* No sk access to conn->hcon any more (lock_sock + hdev->lock) */ 330 spin_lock(&hcon->proto_lock); 331 iso_conn_lock(conn); 332 conn->hcon = NULL; 333 hcon->iso_data = NULL; 334 iso_conn_unlock(conn); 335 spin_unlock(&hcon->proto_lock); 336 337 iso_conn_put(conn); 338 } 339 340 static int __iso_chan_add(struct iso_conn *conn, struct sock *sk, 341 struct sock *parent) 342 { 343 BT_DBG("conn %p", conn); 344 345 if (iso_pi(sk)->conn == conn && conn->sk == sk) 346 return 0; 347 348 if (conn->sk) { 349 BT_ERR("conn->sk already set"); 350 return -EBUSY; 351 } 352 353 if (!conn->hcon) { 354 BT_ERR("conn->hcon missing"); 355 return -EIO; 356 } 357 358 iso_pi(sk)->conn = iso_conn_hold(conn); 359 conn->sk = sk; 360 clear_bit(ISO_CONN_DROPPED, conn->flags); 361 362 if (parent) 363 bt_accept_enqueue(parent, sk, true); 364 365 return 0; 366 } 367 368 static int iso_chan_add(struct iso_conn *conn, struct sock *sk, 369 struct sock *parent) 370 { 371 int err; 372 373 iso_conn_lock(conn); 374 err = __iso_chan_add(conn, sk, parent); 375 iso_conn_unlock(conn); 376 377 return err; 378 } 379 380 static inline u8 le_addr_type(u8 bdaddr_type) 381 { 382 if (bdaddr_type == BDADDR_LE_PUBLIC) 383 return ADDR_LE_DEV_PUBLIC; 384 else 385 return ADDR_LE_DEV_RANDOM; 386 } 387 388 static int iso_connect_bis(struct sock *sk) 389 { 390 struct iso_conn *conn; 391 struct hci_conn *hcon; 392 struct hci_dev *hdev; 393 bdaddr_t src, dst; 394 u8 src_type, bc_sid; 395 int err; 396 397 lock_sock(sk); 398 bacpy(&src, &iso_pi(sk)->src); 399 bacpy(&dst, &iso_pi(sk)->dst); 400 src_type = iso_pi(sk)->src_type; 401 bc_sid = iso_pi(sk)->bc_sid; 402 release_sock(sk); 403 404 BT_DBG("%pMR (SID 0x%2.2x)", &src, bc_sid); 405 406 hdev = hci_get_route(&dst, &src, src_type); 407 if (!hdev) 408 return -EHOSTUNREACH; 409 410 hci_dev_lock(hdev); 411 lock_sock(sk); 412 413 if (!bis_capable(hdev)) { 414 err = -EOPNOTSUPP; 415 goto unlock; 416 } 417 418 /* Fail if user set invalid QoS */ 419 if (iso_pi(sk)->qos_user_set && !check_bcast_qos(&iso_pi(sk)->qos)) { 420 iso_pi(sk)->qos = default_qos; 421 err = -EINVAL; 422 goto unlock; 423 } 424 425 /* Fail if out PHYs are marked as disabled */ 426 if (!iso_pi(sk)->qos.bcast.out.phys) { 427 err = -EINVAL; 428 goto unlock; 429 } 430 431 /* Just bind if DEFER_SETUP has been set */ 432 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { 433 hcon = hci_bind_bis(hdev, &iso_pi(sk)->dst, iso_pi(sk)->bc_sid, 434 &iso_pi(sk)->qos, iso_pi(sk)->base_len, 435 iso_pi(sk)->base, 436 READ_ONCE(sk->sk_sndtimeo)); 437 if (IS_ERR(hcon)) { 438 err = PTR_ERR(hcon); 439 goto unlock; 440 } 441 } else { 442 hcon = hci_connect_bis(hdev, &iso_pi(sk)->dst, 443 le_addr_type(iso_pi(sk)->dst_type), 444 iso_pi(sk)->bc_sid, &iso_pi(sk)->qos, 445 iso_pi(sk)->base_len, iso_pi(sk)->base, 446 READ_ONCE(sk->sk_sndtimeo)); 447 if (IS_ERR(hcon)) { 448 err = PTR_ERR(hcon); 449 goto unlock; 450 } 451 452 /* Update SID if it was not set */ 453 if (iso_pi(sk)->bc_sid == HCI_SID_INVALID) 454 iso_pi(sk)->bc_sid = hcon->sid; 455 } 456 457 lockdep_assert_held(&hcon->hdev->lock); 458 459 conn = iso_conn_add(hcon); 460 if (!conn) { 461 hci_conn_drop(hcon); 462 err = -ENOMEM; 463 goto unlock; 464 } 465 466 err = iso_chan_add(conn, sk, NULL); 467 iso_conn_put(conn); 468 if (err) 469 goto unlock; 470 471 /* Update source addr of the socket */ 472 bacpy(&iso_pi(sk)->src, &hcon->src); 473 474 if (hcon->state == BT_CONNECTED) { 475 iso_sock_clear_timer(sk); 476 sk->sk_state = BT_CONNECTED; 477 } else if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { 478 iso_sock_clear_timer(sk); 479 sk->sk_state = BT_CONNECT; 480 } else { 481 sk->sk_state = BT_CONNECT; 482 iso_sock_set_timer(sk, READ_ONCE(sk->sk_sndtimeo)); 483 } 484 485 unlock: 486 release_sock(sk); 487 hci_dev_unlock(hdev); 488 hci_dev_put(hdev); 489 return err; 490 } 491 492 static int iso_connect_cis(struct sock *sk) 493 { 494 struct iso_conn *conn; 495 struct hci_conn *hcon; 496 struct hci_dev *hdev; 497 bdaddr_t src, dst; 498 u8 src_type; 499 int err; 500 501 lock_sock(sk); 502 bacpy(&src, &iso_pi(sk)->src); 503 bacpy(&dst, &iso_pi(sk)->dst); 504 src_type = iso_pi(sk)->src_type; 505 release_sock(sk); 506 507 BT_DBG("%pMR -> %pMR", &src, &dst); 508 509 hdev = hci_get_route(&dst, &src, src_type); 510 if (!hdev) 511 return -EHOSTUNREACH; 512 513 hci_dev_lock(hdev); 514 lock_sock(sk); 515 516 if (!cis_central_capable(hdev)) { 517 err = -EOPNOTSUPP; 518 goto unlock; 519 } 520 521 /* Fail if user set invalid QoS */ 522 if (iso_pi(sk)->qos_user_set && !check_ucast_qos(&iso_pi(sk)->qos)) { 523 iso_pi(sk)->qos = default_qos; 524 err = -EINVAL; 525 goto unlock; 526 } 527 528 /* Fail if either PHYs are marked as disabled */ 529 if (!iso_pi(sk)->qos.ucast.in.phys && !iso_pi(sk)->qos.ucast.out.phys) { 530 err = -EINVAL; 531 goto unlock; 532 } 533 534 /* Check if there are available buffers for output/TX. */ 535 if (iso_pi(sk)->qos.ucast.out.sdu && !hci_iso_count(hdev) && 536 (hdev->iso_pkts && !hdev->iso_cnt)) { 537 err = -ENOBUFS; 538 goto unlock; 539 } 540 541 /* Just bind if DEFER_SETUP has been set */ 542 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { 543 hcon = hci_bind_cis(hdev, &iso_pi(sk)->dst, 544 le_addr_type(iso_pi(sk)->dst_type), 545 &iso_pi(sk)->qos, 546 READ_ONCE(sk->sk_sndtimeo)); 547 if (IS_ERR(hcon)) { 548 err = PTR_ERR(hcon); 549 goto unlock; 550 } 551 } else { 552 hcon = hci_connect_cis(hdev, &iso_pi(sk)->dst, 553 le_addr_type(iso_pi(sk)->dst_type), 554 &iso_pi(sk)->qos, 555 READ_ONCE(sk->sk_sndtimeo)); 556 if (IS_ERR(hcon)) { 557 err = PTR_ERR(hcon); 558 goto unlock; 559 } 560 } 561 562 lockdep_assert_held(&hcon->hdev->lock); 563 564 conn = iso_conn_add(hcon); 565 if (!conn) { 566 hci_conn_drop(hcon); 567 err = -ENOMEM; 568 goto unlock; 569 } 570 571 err = iso_chan_add(conn, sk, NULL); 572 iso_conn_put(conn); 573 if (err) 574 goto unlock; 575 576 /* Update source addr of the socket */ 577 bacpy(&iso_pi(sk)->src, &hcon->src); 578 579 if (hcon->state == BT_CONNECTED) { 580 iso_sock_clear_timer(sk); 581 sk->sk_state = BT_CONNECTED; 582 } else if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { 583 iso_sock_clear_timer(sk); 584 sk->sk_state = BT_CONNECT; 585 } else { 586 sk->sk_state = BT_CONNECT; 587 iso_sock_set_timer(sk, READ_ONCE(sk->sk_sndtimeo)); 588 } 589 590 unlock: 591 release_sock(sk); 592 hci_dev_unlock(hdev); 593 hci_dev_put(hdev); 594 return err; 595 } 596 597 static struct bt_iso_qos *iso_sock_get_qos(struct sock *sk) 598 { 599 if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONNECT2) 600 return &iso_pi(sk)->conn->hcon->iso_qos; 601 602 return &iso_pi(sk)->qos; 603 } 604 605 static int iso_send_frame(struct sock *sk, struct sk_buff *skb, 606 const struct sockcm_cookie *sockc) 607 { 608 struct iso_conn *conn = iso_pi(sk)->conn; 609 struct bt_iso_qos *qos = iso_sock_get_qos(sk); 610 struct hci_iso_data_hdr *hdr; 611 int len = 0; 612 613 BT_DBG("sk %p len %d", sk, skb->len); 614 615 if (skb->len > qos->ucast.out.sdu) 616 return -EMSGSIZE; 617 618 len = skb->len; 619 620 /* Push ISO data header */ 621 hdr = skb_push(skb, HCI_ISO_DATA_HDR_SIZE); 622 hdr->sn = cpu_to_le16(conn->tx_sn++); 623 hdr->slen = cpu_to_le16(hci_iso_data_len_pack(len, 624 HCI_ISO_STATUS_VALID)); 625 626 if (sk->sk_state == BT_CONNECTED) { 627 hci_setup_tx_timestamp(skb, 1, sockc); 628 hci_send_iso(conn->hcon, skb); 629 } else { 630 len = -ENOTCONN; 631 } 632 633 return len; 634 } 635 636 static void iso_recv_frame(struct iso_conn *conn, struct sk_buff *skb) 637 { 638 struct sock *sk; 639 640 iso_conn_lock(conn); 641 sk = iso_sock_hold(conn); 642 iso_conn_unlock(conn); 643 644 if (!sk) 645 goto drop; 646 647 BT_DBG("sk %p len %d", sk, skb->len); 648 649 if (sk->sk_state != BT_CONNECTED) 650 goto drop_put; 651 652 if (!sock_queue_rcv_skb(sk, skb)) { 653 sock_put(sk); 654 return; 655 } 656 657 drop_put: 658 sock_put(sk); 659 drop: 660 kfree_skb(skb); 661 } 662 663 /* -------- Socket interface ---------- */ 664 static struct sock *__iso_get_sock_listen_by_addr(bdaddr_t *src, bdaddr_t *dst) 665 { 666 struct sock *sk; 667 668 sk_for_each(sk, &iso_sk_list.head) { 669 if (sk->sk_state != BT_LISTEN) 670 continue; 671 672 if (bacmp(&iso_pi(sk)->dst, dst)) 673 continue; 674 675 if (!bacmp(&iso_pi(sk)->src, src)) 676 return sk; 677 } 678 679 return NULL; 680 } 681 682 static struct sock *__iso_get_sock_listen_by_sid(bdaddr_t *ba, bdaddr_t *bc, 683 __u8 sid) 684 { 685 struct sock *sk; 686 687 sk_for_each(sk, &iso_sk_list.head) { 688 if (sk->sk_state != BT_LISTEN) 689 continue; 690 691 if (bacmp(&iso_pi(sk)->src, ba)) 692 continue; 693 694 if (bacmp(&iso_pi(sk)->dst, bc)) 695 continue; 696 697 if (iso_pi(sk)->bc_sid == sid) 698 return sk; 699 } 700 701 return NULL; 702 } 703 704 /* Find socket in given state: 705 * source bdaddr (Unicast) 706 * destination bdaddr (Broadcast only) 707 * match func - pass NULL to ignore 708 * match func data - pass -1 to ignore 709 * Returns closest match. 710 */ 711 static struct sock *iso_get_sock(struct hci_dev *hdev, bdaddr_t *src, 712 bdaddr_t *dst, enum bt_sock_state state, 713 iso_sock_match_t match, void *data) 714 { 715 struct sock *sk = NULL, *sk1 = NULL; 716 717 read_lock(&iso_sk_list.lock); 718 719 sk_for_each(sk, &iso_sk_list.head) { 720 if (sk->sk_state != state) 721 continue; 722 723 /* Match Broadcast destination */ 724 if (bacmp(dst, BDADDR_ANY) && bacmp(&iso_pi(sk)->dst, dst)) { 725 struct smp_irk *irk1, *irk2; 726 727 /* Check if destination is an RPA that we can resolve */ 728 irk1 = hci_find_irk_by_rpa(hdev, dst); 729 if (!irk1) 730 continue; 731 732 /* Match with identity address */ 733 if (bacmp(&iso_pi(sk)->dst, &irk1->bdaddr)) { 734 /* Check if socket destination address is also 735 * an RPA and if the IRK matches. 736 */ 737 irk2 = hci_find_irk_by_rpa(hdev, 738 &iso_pi(sk)->dst); 739 if (!irk2 || irk1 != irk2) 740 continue; 741 } 742 } 743 744 /* Use Match function if provided */ 745 if (match && !match(sk, data)) 746 continue; 747 748 /* Exact match. */ 749 if (!bacmp(&iso_pi(sk)->src, src)) { 750 sock_hold(sk); 751 break; 752 } 753 754 /* Closest match */ 755 if (!bacmp(&iso_pi(sk)->src, BDADDR_ANY)) { 756 if (sk1) 757 sock_put(sk1); 758 759 sk1 = sk; 760 sock_hold(sk1); 761 } 762 } 763 764 if (sk && sk1) 765 sock_put(sk1); 766 767 read_unlock(&iso_sk_list.lock); 768 769 return sk ? sk : sk1; 770 } 771 772 static struct sock *iso_get_sock_big(struct sock *match_sk, bdaddr_t *src, 773 bdaddr_t *dst, uint8_t big) 774 { 775 struct sock *sk = NULL; 776 777 read_lock(&iso_sk_list.lock); 778 779 sk_for_each(sk, &iso_sk_list.head) { 780 if (match_sk == sk) 781 continue; 782 783 /* Look for sockets that have already been 784 * connected to the BIG 785 */ 786 if (sk->sk_state != BT_CONNECTED && 787 sk->sk_state != BT_CONNECT) 788 continue; 789 790 /* Match Broadcast destination */ 791 if (bacmp(&iso_pi(sk)->dst, dst)) 792 continue; 793 794 /* Match BIG handle */ 795 if (iso_pi(sk)->qos.bcast.big != big) 796 continue; 797 798 /* Match source address */ 799 if (bacmp(&iso_pi(sk)->src, src)) 800 continue; 801 802 sock_hold(sk); 803 break; 804 } 805 806 read_unlock(&iso_sk_list.lock); 807 808 return sk; 809 } 810 811 static void iso_sock_destruct(struct sock *sk) 812 { 813 BT_DBG("sk %p", sk); 814 815 iso_conn_put(iso_pi(sk)->conn); 816 817 skb_queue_purge(&sk->sk_receive_queue); 818 skb_queue_purge(&sk->sk_write_queue); 819 skb_queue_purge(&sk->sk_error_queue); 820 } 821 822 static void iso_sock_cleanup_listen(struct sock *parent) 823 { 824 struct sock *sk; 825 826 BT_DBG("parent %p", parent); 827 828 /* Close not yet accepted channels */ 829 while ((sk = bt_accept_dequeue(parent, NULL))) { 830 iso_sock_close(sk); 831 iso_sock_kill(sk); 832 /* Drop the reference handed back by bt_accept_dequeue(). */ 833 sock_put(sk); 834 } 835 836 /* If listening socket has a hcon, properly disconnect it */ 837 if (iso_pi(parent)->conn && iso_pi(parent)->conn->hcon) { 838 iso_sock_disconn(parent); 839 return; 840 } 841 842 parent->sk_state = BT_CLOSED; 843 sock_set_flag(parent, SOCK_ZAPPED); 844 } 845 846 /* Kill socket (only if zapped and orphan) 847 * Must be called on unlocked socket. 848 */ 849 static void iso_sock_kill(struct sock *sk) 850 { 851 iso_sock_disable_timer(sk); 852 853 lock_sock(sk); 854 855 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket || 856 test_bit(BT_SK_KILLED, &iso_pi(sk)->flags)) { 857 release_sock(sk); 858 return; 859 } 860 861 BT_DBG("sk %p state %d", sk, sk->sk_state); 862 863 /* Sock is dead, so set conn->sk to NULL to avoid possible UAF */ 864 if (iso_pi(sk)->conn) { 865 iso_conn_lock(iso_pi(sk)->conn); 866 iso_pi(sk)->conn->sk = NULL; 867 iso_conn_unlock(iso_pi(sk)->conn); 868 } 869 870 /* Kill poor orphan */ 871 bt_sock_unlink(&iso_sk_list, sk); 872 sock_set_flag(sk, SOCK_DEAD); 873 set_bit(BT_SK_KILLED, &iso_pi(sk)->flags); 874 875 release_sock(sk); 876 sock_put(sk); 877 } 878 879 static void iso_sock_disconn(struct sock *sk) 880 { 881 struct sock *bis_sk; 882 struct hci_conn *hcon = iso_pi(sk)->conn->hcon; 883 884 if (test_bit(HCI_CONN_BIG_CREATED, &hcon->flags)) { 885 bis_sk = iso_get_sock_big(sk, &iso_pi(sk)->src, 886 &iso_pi(sk)->dst, 887 iso_pi(sk)->qos.bcast.big); 888 889 /* If there are any other connected sockets for the 890 * same BIG, just delete the sk and leave the bis 891 * hcon active, in case later rebinding is needed. 892 */ 893 if (bis_sk) { 894 hcon->state = BT_OPEN; 895 set_bit(ISO_CONN_DROPPED, iso_pi(sk)->conn->flags); 896 897 iso_sock_clear_timer(sk); 898 iso_chan_del(sk, bt_to_errno(hcon->abort_reason)); 899 sock_put(bis_sk); 900 return; 901 } 902 } 903 904 sk->sk_state = BT_DISCONN; 905 if (!test_and_set_bit(ISO_CONN_DROPPED, iso_pi(sk)->conn->flags)) 906 hci_conn_drop(iso_pi(sk)->conn->hcon); 907 } 908 909 static void __iso_sock_close(struct sock *sk) 910 { 911 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); 912 913 switch (sk->sk_state) { 914 case BT_LISTEN: 915 iso_sock_cleanup_listen(sk); 916 break; 917 918 case BT_CONNECT: 919 case BT_CONNECTED: 920 case BT_CONFIG: 921 if (iso_pi(sk)->conn->hcon) 922 iso_sock_disconn(sk); 923 else 924 iso_chan_del(sk, ECONNRESET); 925 break; 926 927 case BT_CONNECT2: 928 if (iso_pi(sk)->conn->hcon && 929 (test_bit(HCI_CONN_PA_SYNC, &iso_pi(sk)->conn->hcon->flags) || 930 test_bit(HCI_CONN_PA_SYNC_FAILED, &iso_pi(sk)->conn->hcon->flags))) 931 iso_sock_disconn(sk); 932 else 933 iso_chan_del(sk, ECONNRESET); 934 break; 935 case BT_DISCONN: 936 iso_chan_del(sk, ECONNRESET); 937 break; 938 939 default: 940 sock_set_flag(sk, SOCK_ZAPPED); 941 break; 942 } 943 } 944 945 /* Must be called on unlocked socket. */ 946 static void iso_sock_close(struct sock *sk) 947 { 948 iso_sock_disable_timer(sk); 949 950 lock_sock(sk); 951 __iso_sock_close(sk); 952 release_sock(sk); 953 } 954 955 static void iso_sock_init(struct sock *sk, struct sock *parent) 956 { 957 BT_DBG("sk %p", sk); 958 959 if (parent) { 960 sk->sk_type = parent->sk_type; 961 bt_sk(sk)->flags = bt_sk(parent)->flags; 962 security_sk_clone(parent, sk); 963 } 964 } 965 966 static struct proto iso_proto = { 967 .name = "ISO", 968 .owner = THIS_MODULE, 969 .obj_size = sizeof(struct iso_pinfo) 970 }; 971 972 #define DEFAULT_IO_QOS \ 973 { \ 974 .interval = 10000u, \ 975 .latency = 10u, \ 976 .sdu = 40u, \ 977 .phys = BT_ISO_PHY_2M, \ 978 .rtn = 2u, \ 979 } 980 981 static struct bt_iso_qos default_qos = { 982 .bcast = { 983 .big = BT_ISO_QOS_BIG_UNSET, 984 .bis = BT_ISO_QOS_BIS_UNSET, 985 .sync_factor = 0x01, 986 .packing = 0x00, 987 .framing = 0x00, 988 .in = DEFAULT_IO_QOS, 989 .out = DEFAULT_IO_QOS, 990 .encryption = 0x00, 991 .bcode = {0x00}, 992 .options = 0x00, 993 .skip = 0x0000, 994 .sync_timeout = BT_ISO_SYNC_TIMEOUT, 995 .sync_cte_type = 0x00, 996 .mse = 0x00, 997 .timeout = BT_ISO_SYNC_TIMEOUT, 998 }, 999 }; 1000 1001 static struct sock *iso_sock_alloc(struct net *net, struct socket *sock, 1002 int proto, gfp_t prio, int kern) 1003 { 1004 struct sock *sk; 1005 1006 sk = bt_sock_alloc(net, sock, &iso_proto, proto, prio, kern); 1007 if (!sk) 1008 return NULL; 1009 1010 sk->sk_destruct = iso_sock_destruct; 1011 sk->sk_sndtimeo = ISO_CONN_TIMEOUT; 1012 1013 /* Set address type as public as default src address is BDADDR_ANY */ 1014 iso_pi(sk)->src_type = BDADDR_LE_PUBLIC; 1015 1016 iso_pi(sk)->qos = default_qos; 1017 iso_pi(sk)->sync_handle = -1; 1018 1019 INIT_DELAYED_WORK(&iso_pi(sk)->timeout_work, iso_sock_timeout); 1020 1021 bt_sock_link(&iso_sk_list, sk); 1022 return sk; 1023 } 1024 1025 static int iso_sock_create(struct net *net, struct socket *sock, int protocol, 1026 int kern) 1027 { 1028 struct sock *sk; 1029 1030 BT_DBG("sock %p", sock); 1031 1032 sock->state = SS_UNCONNECTED; 1033 1034 if (sock->type != SOCK_SEQPACKET) 1035 return -ESOCKTNOSUPPORT; 1036 1037 sock->ops = &iso_sock_ops; 1038 1039 sk = iso_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern); 1040 if (!sk) 1041 return -ENOMEM; 1042 1043 iso_sock_init(sk, NULL); 1044 return 0; 1045 } 1046 1047 static int iso_sock_bind_bc(struct socket *sock, struct sockaddr_unsized *addr, 1048 int addr_len) 1049 { 1050 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr; 1051 struct sock *sk = sock->sk; 1052 int i; 1053 1054 BT_DBG("sk %p bc_sid %u bc_num_bis %u", sk, sa->iso_bc->bc_sid, 1055 sa->iso_bc->bc_num_bis); 1056 1057 if (addr_len != sizeof(*sa) + sizeof(*sa->iso_bc)) 1058 return -EINVAL; 1059 1060 bacpy(&iso_pi(sk)->dst, &sa->iso_bc->bc_bdaddr); 1061 1062 /* Check if the address type is of LE type */ 1063 if (!bdaddr_type_is_le(sa->iso_bc->bc_bdaddr_type)) 1064 return -EINVAL; 1065 1066 iso_pi(sk)->dst_type = sa->iso_bc->bc_bdaddr_type; 1067 1068 if (sa->iso_bc->bc_sid > 0x0f && sa->iso_bc->bc_sid != HCI_SID_INVALID) 1069 return -EINVAL; 1070 1071 iso_pi(sk)->bc_sid = sa->iso_bc->bc_sid; 1072 1073 if (sa->iso_bc->bc_num_bis > ISO_MAX_NUM_BIS) 1074 return -EINVAL; 1075 1076 iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis; 1077 1078 for (i = 0; i < iso_pi(sk)->bc_num_bis; i++) 1079 if (sa->iso_bc->bc_bis[i] < 0x01 || 1080 sa->iso_bc->bc_bis[i] > 0x1f) 1081 return -EINVAL; 1082 1083 memcpy(iso_pi(sk)->bc_bis, sa->iso_bc->bc_bis, 1084 iso_pi(sk)->bc_num_bis); 1085 1086 return 0; 1087 } 1088 1089 /* Must be called on the locked socket. */ 1090 static int iso_sock_rebind_bis(struct sock *sk, struct sockaddr_iso *sa, 1091 int addr_len) 1092 { 1093 int err = 0; 1094 1095 if (!test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags)) 1096 return -EBADFD; 1097 1098 if (sa->iso_bc->bc_num_bis > ISO_MAX_NUM_BIS) { 1099 err = -EINVAL; 1100 goto done; 1101 } 1102 1103 for (int i = 0; i < sa->iso_bc->bc_num_bis; i++) 1104 if (sa->iso_bc->bc_bis[i] < 0x01 || 1105 sa->iso_bc->bc_bis[i] > 0x1f) { 1106 err = -EINVAL; 1107 goto done; 1108 } 1109 1110 iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis; 1111 1112 memcpy(iso_pi(sk)->bc_bis, sa->iso_bc->bc_bis, 1113 iso_pi(sk)->bc_num_bis); 1114 1115 done: 1116 return err; 1117 } 1118 1119 static struct hci_dev *iso_conn_get_hdev(struct iso_conn *conn) 1120 { 1121 struct hci_dev *hdev = NULL; 1122 1123 iso_conn_lock(conn); 1124 if (conn->hcon) 1125 hdev = hci_dev_hold(conn->hcon->hdev); 1126 iso_conn_unlock(conn); 1127 1128 return hdev; 1129 } 1130 1131 /* Must be called on the locked socket. */ 1132 static int iso_sock_rebind_bc(struct sock *sk, struct sockaddr_iso *sa, 1133 int addr_len) 1134 { 1135 struct hci_dev *hdev; 1136 struct hci_conn *bis; 1137 int err; 1138 1139 if (sk->sk_type != SOCK_SEQPACKET || !iso_pi(sk)->conn) 1140 return -EINVAL; 1141 1142 /* Check if it is really a Broadcast address being requested */ 1143 if (addr_len != sizeof(*sa) + sizeof(*sa->iso_bc)) 1144 return -EINVAL; 1145 1146 /* Check if the address hasn't changed then perhaps only the number of 1147 * bis has changed. 1148 */ 1149 if (!bacmp(&iso_pi(sk)->dst, &sa->iso_bc->bc_bdaddr) || 1150 !bacmp(&sa->iso_bc->bc_bdaddr, BDADDR_ANY)) 1151 return iso_sock_rebind_bis(sk, sa, addr_len); 1152 1153 /* Check if the address type is of LE type */ 1154 if (!bdaddr_type_is_le(sa->iso_bc->bc_bdaddr_type)) 1155 return -EINVAL; 1156 1157 hdev = iso_conn_get_hdev(iso_pi(sk)->conn); 1158 if (!hdev) 1159 return -EINVAL; 1160 1161 bis = iso_pi(sk)->conn->hcon; 1162 1163 /* Release the socket before lookups since that requires hci_dev_lock 1164 * which shall not be acquired while holding sock_lock for proper 1165 * ordering. 1166 */ 1167 release_sock(sk); 1168 hci_dev_lock(hdev); 1169 lock_sock(sk); 1170 1171 if (!iso_pi(sk)->conn || iso_pi(sk)->conn->hcon != bis) { 1172 /* raced with iso_conn_del() or iso_disconn_sock() */ 1173 err = -ENOTCONN; 1174 goto unlock; 1175 } 1176 1177 BT_DBG("sk %p %pMR type %u", sk, &sa->iso_bc->bc_bdaddr, 1178 sa->iso_bc->bc_bdaddr_type); 1179 1180 err = hci_past_bis(bis, &sa->iso_bc->bc_bdaddr, 1181 le_addr_type(sa->iso_bc->bc_bdaddr_type)); 1182 1183 unlock: 1184 hci_dev_unlock(hdev); 1185 hci_dev_put(hdev); 1186 1187 return err; 1188 } 1189 1190 static int iso_sock_bind(struct socket *sock, struct sockaddr_unsized *addr, 1191 int addr_len) 1192 { 1193 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr; 1194 struct sock *sk = sock->sk; 1195 int err = 0; 1196 1197 BT_DBG("sk %p %pMR type %u", sk, &sa->iso_bdaddr, sa->iso_bdaddr_type); 1198 1199 if (!addr || addr_len < sizeof(struct sockaddr_iso) || 1200 addr->sa_family != AF_BLUETOOTH) 1201 return -EINVAL; 1202 1203 lock_sock(sk); 1204 1205 if ((sk->sk_state == BT_CONNECT2 || sk->sk_state == BT_CONNECTED) && 1206 addr_len > sizeof(*sa)) { 1207 /* Allow the user to rebind to a different address using 1208 * PAST procedures. 1209 */ 1210 err = iso_sock_rebind_bc(sk, sa, addr_len); 1211 goto done; 1212 } 1213 1214 if (sk->sk_state != BT_OPEN) { 1215 err = -EBADFD; 1216 goto done; 1217 } 1218 1219 if (sk->sk_type != SOCK_SEQPACKET) { 1220 err = -EINVAL; 1221 goto done; 1222 } 1223 1224 /* Check if the address type is of LE type */ 1225 if (!bdaddr_type_is_le(sa->iso_bdaddr_type)) { 1226 err = -EINVAL; 1227 goto done; 1228 } 1229 1230 bacpy(&iso_pi(sk)->src, &sa->iso_bdaddr); 1231 iso_pi(sk)->src_type = sa->iso_bdaddr_type; 1232 1233 /* Check for Broadcast address */ 1234 if (addr_len > sizeof(*sa)) { 1235 err = iso_sock_bind_bc(sock, addr, addr_len); 1236 if (err) 1237 goto done; 1238 } 1239 1240 sk->sk_state = BT_BOUND; 1241 1242 done: 1243 release_sock(sk); 1244 return err; 1245 } 1246 1247 static int iso_sock_connect(struct socket *sock, struct sockaddr_unsized *addr, 1248 int alen, int flags) 1249 { 1250 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr; 1251 struct sock *sk = sock->sk; 1252 int err; 1253 1254 BT_DBG("sk %p", sk); 1255 1256 if (alen < sizeof(struct sockaddr_iso) || 1257 addr->sa_family != AF_BLUETOOTH) 1258 return -EINVAL; 1259 1260 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) 1261 return -EBADFD; 1262 1263 if (sk->sk_type != SOCK_SEQPACKET) 1264 return -EINVAL; 1265 1266 /* Check if the address type is of LE type */ 1267 if (!bdaddr_type_is_le(sa->iso_bdaddr_type)) 1268 return -EINVAL; 1269 1270 lock_sock(sk); 1271 1272 bacpy(&iso_pi(sk)->dst, &sa->iso_bdaddr); 1273 iso_pi(sk)->dst_type = sa->iso_bdaddr_type; 1274 1275 release_sock(sk); 1276 1277 if (bacmp(&sa->iso_bdaddr, BDADDR_ANY)) 1278 err = iso_connect_cis(sk); 1279 else 1280 err = iso_connect_bis(sk); 1281 1282 if (err) 1283 return err; 1284 1285 lock_sock(sk); 1286 1287 if (!test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { 1288 err = bt_sock_wait_state(sk, BT_CONNECTED, 1289 sock_sndtimeo(sk, flags & O_NONBLOCK)); 1290 } 1291 1292 release_sock(sk); 1293 return err; 1294 } 1295 1296 static int iso_listen_bis(struct sock *sk) 1297 { 1298 struct iso_conn *conn; 1299 struct hci_conn *hcon; 1300 struct hci_dev *hdev; 1301 bdaddr_t src, dst; 1302 u8 src_type, bc_sid; 1303 int err = 0; 1304 1305 lock_sock(sk); 1306 bacpy(&src, &iso_pi(sk)->src); 1307 bacpy(&dst, &iso_pi(sk)->dst); 1308 src_type = iso_pi(sk)->src_type; 1309 bc_sid = iso_pi(sk)->bc_sid; 1310 release_sock(sk); 1311 1312 BT_DBG("%pMR -> %pMR (SID 0x%2.2x)", &src, &dst, bc_sid); 1313 1314 write_lock(&iso_sk_list.lock); 1315 1316 if (__iso_get_sock_listen_by_sid(&src, &dst, bc_sid)) 1317 err = -EADDRINUSE; 1318 1319 write_unlock(&iso_sk_list.lock); 1320 1321 if (err) 1322 return err; 1323 1324 hdev = hci_get_route(&dst, &src, src_type); 1325 if (!hdev) 1326 return -EHOSTUNREACH; 1327 1328 hci_dev_lock(hdev); 1329 lock_sock(sk); 1330 1331 /* Fail if user set invalid QoS */ 1332 if (iso_pi(sk)->qos_user_set && !check_bcast_qos(&iso_pi(sk)->qos)) { 1333 iso_pi(sk)->qos = default_qos; 1334 err = -EINVAL; 1335 goto unlock; 1336 } 1337 1338 hcon = hci_pa_create_sync(hdev, &iso_pi(sk)->dst, 1339 le_addr_type(iso_pi(sk)->dst_type), 1340 iso_pi(sk)->bc_sid, &iso_pi(sk)->qos); 1341 if (IS_ERR(hcon)) { 1342 err = PTR_ERR(hcon); 1343 goto unlock; 1344 } 1345 1346 lockdep_assert_held(&hcon->hdev->lock); 1347 1348 conn = iso_conn_add(hcon); 1349 if (!conn) { 1350 hci_conn_drop(hcon); 1351 err = -ENOMEM; 1352 goto unlock; 1353 } 1354 1355 err = iso_chan_add(conn, sk, NULL); 1356 iso_conn_put(conn); 1357 if (err) 1358 goto unlock; 1359 1360 unlock: 1361 release_sock(sk); 1362 hci_dev_unlock(hdev); 1363 hci_dev_put(hdev); 1364 return err; 1365 } 1366 1367 static int iso_listen_cis(struct sock *sk) 1368 { 1369 int err = 0; 1370 1371 BT_DBG("%pMR", &iso_pi(sk)->src); 1372 1373 write_lock(&iso_sk_list.lock); 1374 1375 if (__iso_get_sock_listen_by_addr(&iso_pi(sk)->src, &iso_pi(sk)->dst)) 1376 err = -EADDRINUSE; 1377 1378 write_unlock(&iso_sk_list.lock); 1379 1380 return err; 1381 } 1382 1383 static int iso_sock_listen(struct socket *sock, int backlog) 1384 { 1385 struct sock *sk = sock->sk; 1386 int err = 0; 1387 1388 BT_DBG("sk %p backlog %d", sk, backlog); 1389 1390 sock_hold(sk); 1391 lock_sock(sk); 1392 1393 if (sk->sk_state != BT_BOUND) { 1394 err = -EBADFD; 1395 goto done; 1396 } 1397 1398 if (sk->sk_type != SOCK_SEQPACKET) { 1399 err = -EINVAL; 1400 goto done; 1401 } 1402 1403 if (!bacmp(&iso_pi(sk)->dst, BDADDR_ANY)) { 1404 err = iso_listen_cis(sk); 1405 } else { 1406 /* Drop sock lock to avoid potential 1407 * deadlock with the hdev lock. 1408 */ 1409 release_sock(sk); 1410 err = iso_listen_bis(sk); 1411 lock_sock(sk); 1412 } 1413 1414 if (err) 1415 goto done; 1416 1417 sk->sk_max_ack_backlog = backlog; 1418 sk->sk_ack_backlog = 0; 1419 1420 sk->sk_state = BT_LISTEN; 1421 1422 done: 1423 release_sock(sk); 1424 sock_put(sk); 1425 return err; 1426 } 1427 1428 static int iso_sock_accept(struct socket *sock, struct socket *newsock, 1429 struct proto_accept_arg *arg) 1430 { 1431 DEFINE_WAIT_FUNC(wait, woken_wake_function); 1432 struct sock *sk = sock->sk, *ch; 1433 long timeo; 1434 int err = 0; 1435 1436 /* Use explicit nested locking to avoid lockdep warnings generated 1437 * because the parent socket and the child socket are locked on the 1438 * same thread. 1439 */ 1440 lock_sock_nested(sk, SINGLE_DEPTH_NESTING); 1441 1442 timeo = sock_rcvtimeo(sk, arg->flags & O_NONBLOCK); 1443 1444 BT_DBG("sk %p timeo %ld", sk, timeo); 1445 1446 /* Wait for an incoming connection. (wake-one). */ 1447 add_wait_queue_exclusive(sk_sleep(sk), &wait); 1448 while (1) { 1449 if (sk->sk_state != BT_LISTEN) { 1450 err = -EBADFD; 1451 break; 1452 } 1453 1454 ch = bt_accept_dequeue(sk, newsock); 1455 if (ch) { 1456 /* Drop the bridging ref from bt_accept_dequeue(); 1457 * the grafted socket keeps ch alive from here. 1458 */ 1459 sock_put(ch); 1460 break; 1461 } 1462 1463 if (!timeo) { 1464 err = -EAGAIN; 1465 break; 1466 } 1467 1468 if (signal_pending(current)) { 1469 err = sock_intr_errno(timeo); 1470 break; 1471 } 1472 1473 release_sock(sk); 1474 1475 timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); 1476 lock_sock_nested(sk, SINGLE_DEPTH_NESTING); 1477 } 1478 remove_wait_queue(sk_sleep(sk), &wait); 1479 1480 if (err) 1481 goto done; 1482 1483 newsock->state = SS_CONNECTED; 1484 1485 BT_DBG("new socket %p", ch); 1486 1487 /* A Broadcast Sink might require BIG sync to be terminated 1488 * and re-established multiple times, while keeping the same 1489 * PA sync handle active. To allow this, once all BIS 1490 * connections have been accepted on a PA sync parent socket, 1491 * "reset" socket state, to allow future BIG re-sync procedures. 1492 */ 1493 if (test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags)) { 1494 /* Iterate through the list of bound BIS indices 1495 * and clear each BIS as they are accepted by the 1496 * user space, one by one. 1497 */ 1498 for (int i = 0; i < iso_pi(sk)->bc_num_bis; i++) { 1499 if (iso_pi(sk)->bc_bis[i] > 0) { 1500 iso_pi(sk)->bc_bis[i] = 0; 1501 iso_pi(sk)->bc_num_bis--; 1502 break; 1503 } 1504 } 1505 1506 if (iso_pi(sk)->bc_num_bis == 0) { 1507 /* Once the last BIS was accepted, reset parent 1508 * socket parameters to mark that the listening 1509 * process for BIS connections has been completed: 1510 * 1511 * 1. Reset the DEFER setup flag on the parent sk. 1512 * 2. Clear the flag marking that the BIG create 1513 * sync command is pending. 1514 * 3. Transition socket state from BT_LISTEN to 1515 * BT_CONNECTED. 1516 */ 1517 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); 1518 clear_bit(BT_SK_BIG_SYNC, &iso_pi(sk)->flags); 1519 sk->sk_state = BT_CONNECTED; 1520 } 1521 } 1522 1523 done: 1524 release_sock(sk); 1525 return err; 1526 } 1527 1528 static int iso_sock_getname(struct socket *sock, struct sockaddr *addr, 1529 int peer) 1530 { 1531 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr; 1532 struct sock *sk = sock->sk; 1533 int len = sizeof(struct sockaddr_iso); 1534 1535 BT_DBG("sock %p, sk %p", sock, sk); 1536 1537 lock_sock(sk); 1538 1539 addr->sa_family = AF_BLUETOOTH; 1540 1541 if (peer) { 1542 struct hci_conn *hcon = iso_pi(sk)->conn ? 1543 iso_pi(sk)->conn->hcon : NULL; 1544 1545 bacpy(&sa->iso_bdaddr, &iso_pi(sk)->dst); 1546 sa->iso_bdaddr_type = iso_pi(sk)->dst_type; 1547 1548 if (hcon && (hcon->type == BIS_LINK || hcon->type == PA_LINK)) { 1549 sa->iso_bc->bc_sid = iso_pi(sk)->bc_sid; 1550 sa->iso_bc->bc_num_bis = iso_pi(sk)->bc_num_bis; 1551 memcpy(sa->iso_bc->bc_bis, iso_pi(sk)->bc_bis, 1552 ISO_MAX_NUM_BIS); 1553 len += sizeof(struct sockaddr_iso_bc); 1554 } 1555 } else { 1556 bacpy(&sa->iso_bdaddr, &iso_pi(sk)->src); 1557 sa->iso_bdaddr_type = iso_pi(sk)->src_type; 1558 } 1559 1560 release_sock(sk); 1561 1562 return len; 1563 } 1564 1565 static int iso_sock_sendmsg(struct socket *sock, struct msghdr *msg, 1566 size_t len) 1567 { 1568 struct sock *sk = sock->sk; 1569 struct sk_buff *skb, **frag; 1570 struct sockcm_cookie sockc; 1571 size_t mtu; 1572 int err; 1573 1574 BT_DBG("sock %p, sk %p", sock, sk); 1575 1576 err = sock_error(sk); 1577 if (err) 1578 return err; 1579 1580 if (msg->msg_flags & MSG_OOB) 1581 return -EOPNOTSUPP; 1582 1583 hci_sockcm_init(&sockc, sk); 1584 1585 if (msg->msg_controllen) { 1586 err = sock_cmsg_send(sk, msg, &sockc); 1587 if (err) 1588 return err; 1589 } 1590 1591 lock_sock(sk); 1592 1593 if (sk->sk_state != BT_CONNECTED) { 1594 release_sock(sk); 1595 return -ENOTCONN; 1596 } 1597 1598 mtu = iso_pi(sk)->conn->hcon->mtu; 1599 1600 release_sock(sk); 1601 1602 skb = bt_skb_sendmsg(sk, msg, len, mtu, HCI_ISO_DATA_HDR_SIZE, 0); 1603 if (IS_ERR(skb)) 1604 return PTR_ERR(skb); 1605 1606 len -= skb->len; 1607 1608 BT_DBG("skb %p len %d", sk, skb->len); 1609 1610 /* Continuation fragments */ 1611 frag = &skb_shinfo(skb)->frag_list; 1612 while (len) { 1613 struct sk_buff *tmp; 1614 1615 tmp = bt_skb_sendmsg(sk, msg, len, mtu, 0, 0); 1616 if (IS_ERR(tmp)) { 1617 kfree_skb(skb); 1618 return PTR_ERR(tmp); 1619 } 1620 1621 *frag = tmp; 1622 1623 len -= tmp->len; 1624 1625 skb->len += tmp->len; 1626 skb->data_len += tmp->len; 1627 1628 BT_DBG("frag %p len %d", *frag, tmp->len); 1629 1630 frag = &(*frag)->next; 1631 } 1632 1633 lock_sock(sk); 1634 1635 if (sk->sk_state == BT_CONNECTED) 1636 err = iso_send_frame(sk, skb, &sockc); 1637 else 1638 err = -ENOTCONN; 1639 1640 release_sock(sk); 1641 1642 if (err < 0) 1643 kfree_skb(skb); 1644 return err; 1645 } 1646 1647 static void iso_conn_defer_accept(struct hci_conn *conn) 1648 { 1649 struct hci_cp_le_accept_cis cp; 1650 struct hci_dev *hdev = conn->hdev; 1651 1652 BT_DBG("conn %p", conn); 1653 1654 conn->state = BT_CONFIG; 1655 1656 cp.handle = cpu_to_le16(conn->handle); 1657 1658 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp); 1659 } 1660 1661 static void iso_conn_big_sync(struct sock *sk) 1662 { 1663 int err; 1664 struct hci_dev *hdev; 1665 struct iso_conn *conn; 1666 bdaddr_t src, dst; 1667 u8 src_type; 1668 1669 lock_sock(sk); 1670 bacpy(&src, &iso_pi(sk)->src); 1671 bacpy(&dst, &iso_pi(sk)->dst); 1672 src_type = iso_pi(sk)->src_type; 1673 release_sock(sk); 1674 1675 hdev = hci_get_route(&dst, &src, src_type); 1676 1677 if (!hdev) 1678 return; 1679 1680 /* hci_le_big_create_sync requires hdev lock to be held, since 1681 * it enqueues the HCI LE BIG Create Sync command via 1682 * hci_cmd_sync_queue_once, which checks hdev flags that might 1683 * change. 1684 */ 1685 hci_dev_lock(hdev); 1686 lock_sock(sk); 1687 1688 /* The socket lock was dropped for hci_get_route(), so the connection 1689 * may have been torn down meanwhile: iso_chan_del() clears conn and 1690 * the broadcast teardown path can clear conn->hcon on its own. Check 1691 * both before dereferencing conn->hcon. 1692 */ 1693 conn = iso_pi(sk)->conn; 1694 if (!conn || !conn->hcon) 1695 goto unlock; 1696 1697 if (!test_and_set_bit(BT_SK_BIG_SYNC, &iso_pi(sk)->flags)) { 1698 err = hci_conn_big_create_sync(hdev, conn->hcon, 1699 &iso_pi(sk)->qos, 1700 iso_pi(sk)->sync_handle, 1701 iso_pi(sk)->bc_num_bis, 1702 iso_pi(sk)->bc_bis); 1703 if (err) 1704 bt_dev_err(hdev, "hci_big_create_sync: %d", err); 1705 } 1706 1707 unlock: 1708 release_sock(sk); 1709 hci_dev_unlock(hdev); 1710 hci_dev_put(hdev); 1711 } 1712 1713 static int iso_sock_recvmsg(struct socket *sock, struct msghdr *msg, 1714 size_t len, int flags) 1715 { 1716 struct sock *sk = sock->sk; 1717 struct iso_pinfo *pi = iso_pi(sk); 1718 bool early_ret = false; 1719 int err = 0; 1720 1721 BT_DBG("sk %p", sk); 1722 1723 if (unlikely(flags & MSG_ERRQUEUE)) 1724 return sock_recv_errqueue(sk, msg, len, SOL_BLUETOOTH, 1725 BT_SCM_ERROR); 1726 1727 if (test_and_clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { 1728 sock_hold(sk); 1729 lock_sock(sk); 1730 1731 switch (sk->sk_state) { 1732 case BT_CONNECT2: 1733 if (test_bit(BT_SK_PA_SYNC, &pi->flags)) { 1734 release_sock(sk); 1735 iso_conn_big_sync(sk); 1736 lock_sock(sk); 1737 1738 sk->sk_state = BT_LISTEN; 1739 } else { 1740 iso_conn_defer_accept(pi->conn->hcon); 1741 sk->sk_state = BT_CONFIG; 1742 } 1743 1744 early_ret = true; 1745 break; 1746 case BT_CONNECTED: 1747 if (test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags)) { 1748 release_sock(sk); 1749 iso_conn_big_sync(sk); 1750 lock_sock(sk); 1751 1752 sk->sk_state = BT_LISTEN; 1753 early_ret = true; 1754 } 1755 1756 break; 1757 case BT_CONNECT: 1758 release_sock(sk); 1759 err = iso_connect_cis(sk); 1760 lock_sock(sk); 1761 1762 early_ret = true; 1763 break; 1764 default: 1765 break; 1766 } 1767 1768 release_sock(sk); 1769 sock_put(sk); 1770 1771 if (early_ret) 1772 return err; 1773 } 1774 1775 return bt_sock_recvmsg(sock, msg, len, flags); 1776 } 1777 1778 static bool check_io_qos(struct bt_iso_io_qos *qos) 1779 { 1780 /* If no PHY is enable SDU must be 0 */ 1781 if (!qos->phys && qos->sdu) 1782 return false; 1783 1784 if (qos->interval && (qos->interval < 0xff || qos->interval > 0xfffff)) 1785 return false; 1786 1787 if (qos->latency && (qos->latency < 0x05 || qos->latency > 0xfa0)) 1788 return false; 1789 1790 if (qos->phys > BT_ISO_PHY_ANY) 1791 return false; 1792 1793 return true; 1794 } 1795 1796 static bool check_ucast_qos(struct bt_iso_qos *qos) 1797 { 1798 if (qos->ucast.cig > 0xef && qos->ucast.cig != BT_ISO_QOS_CIG_UNSET) 1799 return false; 1800 1801 if (qos->ucast.cis > 0xef && qos->ucast.cis != BT_ISO_QOS_CIS_UNSET) 1802 return false; 1803 1804 if (qos->ucast.sca > 0x07) 1805 return false; 1806 1807 if (qos->ucast.packing > 0x01) 1808 return false; 1809 1810 if (qos->ucast.framing > 0x01) 1811 return false; 1812 1813 if (!check_io_qos(&qos->ucast.in)) 1814 return false; 1815 1816 if (!check_io_qos(&qos->ucast.out)) 1817 return false; 1818 1819 return true; 1820 } 1821 1822 static bool check_bcast_qos(struct bt_iso_qos *qos) 1823 { 1824 if (!qos->bcast.sync_factor) 1825 qos->bcast.sync_factor = 0x01; 1826 1827 if (qos->bcast.packing > 0x01) 1828 return false; 1829 1830 if (qos->bcast.framing > 0x01) 1831 return false; 1832 1833 if (!check_io_qos(&qos->bcast.in)) 1834 return false; 1835 1836 if (!check_io_qos(&qos->bcast.out)) 1837 return false; 1838 1839 if (qos->bcast.encryption > 0x01) 1840 return false; 1841 1842 if (qos->bcast.options > 0x07) 1843 return false; 1844 1845 if (qos->bcast.skip > 0x01f3) 1846 return false; 1847 1848 if (!qos->bcast.sync_timeout) 1849 qos->bcast.sync_timeout = BT_ISO_SYNC_TIMEOUT; 1850 1851 if (qos->bcast.sync_timeout < 0x000a || qos->bcast.sync_timeout > 0x4000) 1852 return false; 1853 1854 if (qos->bcast.sync_cte_type > 0x1f) 1855 return false; 1856 1857 if (qos->bcast.mse > 0x1f) 1858 return false; 1859 1860 if (!qos->bcast.timeout) 1861 qos->bcast.timeout = BT_ISO_SYNC_TIMEOUT; 1862 1863 if (qos->bcast.timeout < 0x000a || qos->bcast.timeout > 0x4000) 1864 return false; 1865 1866 return true; 1867 } 1868 1869 static int iso_sock_setsockopt(struct socket *sock, int level, int optname, 1870 sockptr_t optval, unsigned int optlen) 1871 { 1872 struct sock *sk = sock->sk; 1873 int err = 0; 1874 struct bt_iso_qos qos = default_qos; 1875 u32 opt; 1876 1877 BT_DBG("sk %p", sk); 1878 1879 lock_sock(sk); 1880 1881 switch (optname) { 1882 case BT_DEFER_SETUP: 1883 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { 1884 err = -EINVAL; 1885 break; 1886 } 1887 1888 err = copy_safe_from_sockptr(&opt, sizeof(opt), optval, optlen); 1889 if (err) 1890 break; 1891 1892 if (opt) 1893 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); 1894 else 1895 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); 1896 break; 1897 1898 case BT_PKT_STATUS: 1899 err = copy_safe_from_sockptr(&opt, sizeof(opt), optval, optlen); 1900 if (err) 1901 break; 1902 1903 if (opt) 1904 set_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags); 1905 else 1906 clear_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags); 1907 break; 1908 1909 case BT_PKT_SEQNUM: 1910 err = copy_safe_from_sockptr(&opt, sizeof(opt), optval, optlen); 1911 if (err) 1912 break; 1913 1914 if (opt) 1915 set_bit(BT_SK_PKT_SEQNUM, &bt_sk(sk)->flags); 1916 else 1917 clear_bit(BT_SK_PKT_SEQNUM, &bt_sk(sk)->flags); 1918 break; 1919 1920 case BT_ISO_QOS: 1921 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND && 1922 sk->sk_state != BT_CONNECT2 && 1923 (!test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags) || 1924 sk->sk_state != BT_CONNECTED)) { 1925 err = -EINVAL; 1926 break; 1927 } 1928 1929 err = copy_safe_from_sockptr(&qos, sizeof(qos), optval, optlen); 1930 if (err) 1931 break; 1932 1933 iso_pi(sk)->qos = qos; 1934 iso_pi(sk)->qos_user_set = true; 1935 1936 break; 1937 1938 case BT_ISO_BASE: 1939 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND && 1940 sk->sk_state != BT_CONNECT2) { 1941 err = -EINVAL; 1942 break; 1943 } 1944 1945 if (optlen > sizeof(iso_pi(sk)->base)) { 1946 err = -EINVAL; 1947 break; 1948 } 1949 1950 err = copy_safe_from_sockptr(iso_pi(sk)->base, optlen, optval, 1951 optlen); 1952 if (err) 1953 break; 1954 1955 iso_pi(sk)->base_len = optlen; 1956 1957 break; 1958 1959 default: 1960 err = -ENOPROTOOPT; 1961 break; 1962 } 1963 1964 release_sock(sk); 1965 return err; 1966 } 1967 1968 static int iso_sock_getsockopt(struct socket *sock, int level, int optname, 1969 sockopt_t *opt) 1970 { 1971 struct sock *sk = sock->sk; 1972 struct bt_iso_qos *qos; 1973 int len, val, err = 0; 1974 u8 base_len; 1975 u8 *base; 1976 1977 BT_DBG("sk %p", sk); 1978 1979 len = opt->optlen; 1980 1981 lock_sock(sk); 1982 1983 switch (optname) { 1984 case BT_DEFER_SETUP: 1985 if (sk->sk_state == BT_CONNECTED) { 1986 err = -EINVAL; 1987 break; 1988 } 1989 1990 val = test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); 1991 if (copy_to_iter(&val, sizeof(val), &opt->iter_out) != 1992 sizeof(val)) 1993 err = -EFAULT; 1994 1995 break; 1996 1997 case BT_PKT_STATUS: 1998 val = test_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags); 1999 if (copy_to_iter(&val, sizeof(val), &opt->iter_out) != 2000 sizeof(val)) 2001 err = -EFAULT; 2002 break; 2003 2004 case BT_ISO_QOS: 2005 qos = iso_sock_get_qos(sk); 2006 2007 len = min_t(unsigned int, len, sizeof(*qos)); 2008 if (copy_to_iter(qos, len, &opt->iter_out) != len) 2009 err = -EFAULT; 2010 2011 break; 2012 2013 case BT_ISO_BASE: 2014 if (sk->sk_state == BT_CONNECTED && 2015 !bacmp(&iso_pi(sk)->dst, BDADDR_ANY)) { 2016 base_len = iso_pi(sk)->conn->hcon->le_per_adv_data_len; 2017 base = iso_pi(sk)->conn->hcon->le_per_adv_data; 2018 } else { 2019 base_len = iso_pi(sk)->base_len; 2020 base = iso_pi(sk)->base; 2021 } 2022 2023 len = min_t(unsigned int, len, base_len); 2024 opt->optlen = len; 2025 if (copy_to_iter(base, len, &opt->iter_out) != len) 2026 err = -EFAULT; 2027 2028 break; 2029 2030 default: 2031 err = -ENOPROTOOPT; 2032 break; 2033 } 2034 2035 release_sock(sk); 2036 return err; 2037 } 2038 2039 static int iso_sock_shutdown(struct socket *sock, int how) 2040 { 2041 struct sock *sk = sock->sk; 2042 int err = 0; 2043 2044 BT_DBG("sock %p, sk %p, how %d", sock, sk, how); 2045 2046 if (!sk) 2047 return 0; 2048 2049 sock_hold(sk); 2050 lock_sock(sk); 2051 2052 switch (how) { 2053 case SHUT_RD: 2054 if (sk->sk_shutdown & RCV_SHUTDOWN) 2055 goto unlock; 2056 sk->sk_shutdown |= RCV_SHUTDOWN; 2057 break; 2058 case SHUT_WR: 2059 if (sk->sk_shutdown & SEND_SHUTDOWN) 2060 goto unlock; 2061 sk->sk_shutdown |= SEND_SHUTDOWN; 2062 break; 2063 case SHUT_RDWR: 2064 if (sk->sk_shutdown & SHUTDOWN_MASK) 2065 goto unlock; 2066 sk->sk_shutdown |= SHUTDOWN_MASK; 2067 break; 2068 } 2069 2070 iso_sock_clear_timer(sk); 2071 __iso_sock_close(sk); 2072 2073 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime && 2074 !(current->flags & PF_EXITING)) 2075 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); 2076 2077 unlock: 2078 release_sock(sk); 2079 sock_put(sk); 2080 2081 return err; 2082 } 2083 2084 static int iso_sock_release(struct socket *sock) 2085 { 2086 struct sock *sk = sock->sk; 2087 int err = 0; 2088 2089 BT_DBG("sock %p, sk %p", sock, sk); 2090 2091 if (!sk) 2092 return 0; 2093 2094 iso_sock_close(sk); 2095 2096 if (sock_flag(sk, SOCK_LINGER) && READ_ONCE(sk->sk_lingertime) && 2097 !(current->flags & PF_EXITING)) { 2098 lock_sock(sk); 2099 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); 2100 release_sock(sk); 2101 } 2102 2103 /* Make sure sk is valid even if iso_conn_del() is concurrent */ 2104 sock_hold(sk); 2105 2106 lock_sock(sk); 2107 sock_orphan(sk); 2108 release_sock(sk); 2109 2110 iso_sock_kill(sk); 2111 2112 sock_put(sk); 2113 return err; 2114 } 2115 2116 static void iso_sock_ready(struct sock *sk) 2117 { 2118 BT_DBG("sk %p", sk); 2119 2120 lockdep_assert(lockdep_sock_is_held(sk)); 2121 2122 switch (sk->sk_state) { 2123 case BT_DISCONN: 2124 case BT_CLOSED: 2125 return; 2126 } 2127 2128 iso_sock_clear_timer(sk); 2129 sk->sk_state = BT_CONNECTED; 2130 sk->sk_state_change(sk); 2131 } 2132 2133 static bool iso_match_big(struct sock *sk, void *data) 2134 { 2135 struct hci_evt_le_big_sync_established *ev = data; 2136 2137 return ev->handle == iso_pi(sk)->qos.bcast.big; 2138 } 2139 2140 static bool iso_match_big_hcon(struct sock *sk, void *data) 2141 { 2142 struct hci_conn *hcon = data; 2143 2144 return hcon->iso_qos.bcast.big == iso_pi(sk)->qos.bcast.big; 2145 } 2146 2147 static bool iso_match_pa_sync_flag(struct sock *sk, void *data) 2148 { 2149 return test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags); 2150 } 2151 2152 static bool iso_match_dst(struct sock *sk, void *data) 2153 { 2154 return !bacmp(&iso_pi(sk)->dst, (bdaddr_t *)data); 2155 } 2156 2157 static void iso_conn_ready(struct iso_conn *conn) 2158 { 2159 struct sock *parent = NULL; 2160 struct sock *sk; 2161 struct hci_ev_le_big_sync_established *ev = NULL; 2162 struct hci_ev_le_pa_sync_established *ev2 = NULL; 2163 struct hci_ev_le_per_adv_report *ev3 = NULL; 2164 struct hci_conn *hcon; 2165 struct hci_dev *hdev; 2166 2167 BT_DBG("conn %p", conn); 2168 2169 iso_conn_lock(conn); 2170 sk = iso_sock_hold(conn); 2171 iso_conn_unlock(conn); 2172 2173 if (sk) { 2174 lock_sock(sk); 2175 2176 /* conn->sk may have become NULL if racing with sk close, but 2177 * due to held hdev->lock, it can't become different sk. 2178 */ 2179 if (!conn->sk) { 2180 release_sock(sk); 2181 sock_put(sk); 2182 return; 2183 } 2184 2185 /* Attempt to update source address in case of BIS Sender if 2186 * the advertisement is using a random address. 2187 */ 2188 if (conn->hcon->type == BIS_LINK && 2189 conn->hcon->role == HCI_ROLE_MASTER && 2190 !bacmp(&conn->hcon->dst, BDADDR_ANY)) { 2191 struct hci_conn *bis = conn->hcon; 2192 struct adv_info *adv; 2193 2194 adv = hci_find_adv_instance(bis->hdev, 2195 bis->iso_qos.bcast.bis); 2196 if (adv && bacmp(&adv->random_addr, BDADDR_ANY)) { 2197 iso_pi(sk)->src_type = BDADDR_LE_RANDOM; 2198 bacpy(&iso_pi(sk)->src, &adv->random_addr); 2199 } 2200 } 2201 2202 iso_sock_ready(sk); 2203 2204 release_sock(sk); 2205 sock_put(sk); 2206 } else { 2207 hcon = conn->hcon; 2208 if (!hcon) 2209 return; 2210 2211 hdev = hcon->hdev; 2212 2213 if (test_bit(HCI_CONN_BIG_SYNC, &hcon->flags)) { 2214 /* A BIS slave hcon is notified to the ISO layer 2215 * after the Command Complete for the LE Setup 2216 * ISO Data Path command is received. Get the 2217 * parent socket that matches the hcon BIG handle. 2218 */ 2219 parent = iso_get_sock(hdev, &hcon->src, &hcon->dst, 2220 BT_LISTEN, iso_match_big_hcon, 2221 hcon); 2222 } else if (test_bit(HCI_CONN_BIG_SYNC_FAILED, &hcon->flags)) { 2223 ev = hci_recv_event_data(hcon->hdev, 2224 HCI_EVT_LE_BIG_SYNC_ESTABLISHED); 2225 2226 /* Get reference to PA sync parent socket, if it exists */ 2227 parent = iso_get_sock(hdev, &hcon->src, &hcon->dst, 2228 BT_LISTEN, 2229 iso_match_pa_sync_flag, 2230 NULL); 2231 if (!parent && ev) 2232 parent = iso_get_sock(hdev, &hcon->src, 2233 &hcon->dst, 2234 BT_LISTEN, 2235 iso_match_big, ev); 2236 } else if (test_bit(HCI_CONN_PA_SYNC_FAILED, &hcon->flags)) { 2237 ev2 = hci_recv_event_data(hcon->hdev, 2238 HCI_EV_LE_PA_SYNC_ESTABLISHED); 2239 if (ev2) 2240 parent = iso_get_sock(hdev, &hcon->src, 2241 &hcon->dst, 2242 BT_LISTEN, 2243 iso_match_sid, ev2); 2244 } else if (test_bit(HCI_CONN_PA_SYNC, &hcon->flags)) { 2245 ev3 = hci_recv_event_data(hcon->hdev, 2246 HCI_EV_LE_PER_ADV_REPORT); 2247 if (ev3) 2248 parent = iso_get_sock(hdev, &hcon->src, 2249 &hcon->dst, 2250 BT_LISTEN, 2251 iso_match_sync_handle_pa_report, 2252 ev3); 2253 } 2254 2255 if (!parent) 2256 parent = iso_get_sock(hdev, &hcon->src, BDADDR_ANY, 2257 BT_LISTEN, iso_match_dst, BDADDR_ANY); 2258 2259 if (!parent) 2260 return; 2261 2262 lock_sock(parent); 2263 2264 sk = iso_sock_alloc(sock_net(parent), NULL, 2265 BTPROTO_ISO, GFP_ATOMIC, 0); 2266 if (!sk) { 2267 release_sock(parent); 2268 return; 2269 } 2270 2271 iso_sock_init(sk, parent); 2272 2273 bacpy(&iso_pi(sk)->src, &hcon->src); 2274 2275 /* Convert from HCI to three-value type */ 2276 if (hcon->src_type == ADDR_LE_DEV_PUBLIC) 2277 iso_pi(sk)->src_type = BDADDR_LE_PUBLIC; 2278 else 2279 iso_pi(sk)->src_type = BDADDR_LE_RANDOM; 2280 2281 /* If hcon has no destination address (BDADDR_ANY) it means it 2282 * was created by HCI_EV_LE_BIG_SYNC_ESTABILISHED or 2283 * HCI_EV_LE_PA_SYNC_ESTABLISHED so we need to initialize using 2284 * the parent socket destination address. 2285 */ 2286 if (!bacmp(&hcon->dst, BDADDR_ANY)) { 2287 bacpy(&hcon->dst, &iso_pi(parent)->dst); 2288 hcon->dst_type = le_addr_type(iso_pi(parent)->dst_type); 2289 } 2290 2291 if (test_bit(HCI_CONN_PA_SYNC, &hcon->flags)) { 2292 iso_pi(sk)->qos = iso_pi(parent)->qos; 2293 hcon->iso_qos = iso_pi(sk)->qos; 2294 iso_pi(sk)->bc_sid = iso_pi(parent)->bc_sid; 2295 iso_pi(sk)->bc_num_bis = iso_pi(parent)->bc_num_bis; 2296 memcpy(iso_pi(sk)->bc_bis, iso_pi(parent)->bc_bis, 2297 ISO_MAX_NUM_BIS); 2298 set_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags); 2299 } 2300 2301 bacpy(&iso_pi(sk)->dst, &hcon->dst); 2302 2303 /* Convert from HCI to three-value type */ 2304 if (hcon->dst_type == ADDR_LE_DEV_PUBLIC) 2305 iso_pi(sk)->dst_type = BDADDR_LE_PUBLIC; 2306 else 2307 iso_pi(sk)->dst_type = BDADDR_LE_RANDOM; 2308 2309 iso_pi(sk)->sync_handle = iso_pi(parent)->sync_handle; 2310 memcpy(iso_pi(sk)->base, iso_pi(parent)->base, iso_pi(parent)->base_len); 2311 iso_pi(sk)->base_len = iso_pi(parent)->base_len; 2312 2313 hci_conn_hold(hcon); 2314 iso_chan_add(conn, sk, parent); 2315 2316 if ((ev && ((struct hci_evt_le_big_sync_established *)ev)->status) || 2317 (ev2 && ev2->status)) { 2318 /* Trigger error signal on child socket */ 2319 sk->sk_err = ECONNREFUSED; 2320 sk->sk_error_report(sk); 2321 } 2322 2323 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) 2324 sk->sk_state = BT_CONNECT2; 2325 else 2326 sk->sk_state = BT_CONNECTED; 2327 2328 /* Wake up parent */ 2329 parent->sk_data_ready(parent); 2330 2331 release_sock(parent); 2332 sock_put(parent); 2333 } 2334 } 2335 2336 static bool iso_match_sid(struct sock *sk, void *data) 2337 { 2338 struct hci_ev_le_pa_sync_established *ev = data; 2339 2340 if (iso_pi(sk)->bc_sid == HCI_SID_INVALID) 2341 return true; 2342 2343 return ev->sid == iso_pi(sk)->bc_sid; 2344 } 2345 2346 static bool iso_match_sid_past(struct sock *sk, void *data) 2347 { 2348 struct hci_ev_le_past_received *ev = data; 2349 2350 if (iso_pi(sk)->bc_sid == HCI_SID_INVALID) 2351 return true; 2352 2353 return ev->sid == iso_pi(sk)->bc_sid; 2354 } 2355 2356 static bool iso_match_sync_handle(struct sock *sk, void *data) 2357 { 2358 struct hci_evt_le_big_info_adv_report *ev = data; 2359 2360 return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle; 2361 } 2362 2363 static bool iso_match_sync_handle_pa_report(struct sock *sk, void *data) 2364 { 2365 struct hci_ev_le_per_adv_report *ev = data; 2366 2367 return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle; 2368 } 2369 2370 /* ----- ISO interface with lower layer (HCI) ----- */ 2371 2372 int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags) 2373 { 2374 struct hci_ev_le_pa_sync_established *ev1; 2375 struct hci_ev_le_past_received *ev1a; 2376 struct hci_evt_le_big_info_adv_report *ev2; 2377 struct hci_ev_le_per_adv_report *ev3; 2378 struct sock *sk; 2379 2380 bt_dev_dbg(hdev, "bdaddr %pMR", bdaddr); 2381 2382 /* Broadcast receiver requires handling of some events before it can 2383 * proceed to establishing a BIG sync: 2384 * 2385 * 1. HCI_EV_LE_PA_SYNC_ESTABLISHED: The socket may specify a specific 2386 * SID to listen to and once sync is established its handle needs to 2387 * be stored in iso_pi(sk)->sync_handle so it can be matched once 2388 * receiving the BIG Info. 2389 * 1a. HCI_EV_LE_PAST_RECEIVED: alternative to 1. 2390 * 2. HCI_EVT_LE_BIG_INFO_ADV_REPORT: When connect_ind is triggered by a 2391 * a BIG Info it attempts to check if there any listening socket with 2392 * the same sync_handle and if it does then attempt to create a sync. 2393 * 3. HCI_EV_LE_PER_ADV_REPORT: When a PA report is received, it is stored 2394 * in iso_pi(sk)->base so it can be passed up to user, in the case of a 2395 * broadcast sink. 2396 */ 2397 ev1 = hci_recv_event_data(hdev, HCI_EV_LE_PA_SYNC_ESTABLISHED); 2398 if (ev1) { 2399 sk = iso_get_sock(hdev, &hdev->bdaddr, bdaddr, BT_LISTEN, 2400 iso_match_sid, ev1); 2401 if (sk && !ev1->status) { 2402 lock_sock(sk); 2403 iso_pi(sk)->sync_handle = le16_to_cpu(ev1->handle); 2404 iso_pi(sk)->bc_sid = ev1->sid; 2405 release_sock(sk); 2406 } 2407 2408 goto done; 2409 } 2410 2411 ev1a = hci_recv_event_data(hdev, HCI_EV_LE_PAST_RECEIVED); 2412 if (ev1a) { 2413 sk = iso_get_sock(hdev, &hdev->bdaddr, bdaddr, BT_LISTEN, 2414 iso_match_sid_past, ev1a); 2415 if (sk && !ev1a->status) { 2416 lock_sock(sk); 2417 iso_pi(sk)->sync_handle = le16_to_cpu(ev1a->sync_handle); 2418 iso_pi(sk)->bc_sid = ev1a->sid; 2419 release_sock(sk); 2420 } 2421 2422 goto done; 2423 } 2424 2425 ev2 = hci_recv_event_data(hdev, HCI_EVT_LE_BIG_INFO_ADV_REPORT); 2426 if (ev2) { 2427 /* Check if BIGInfo report has already been handled */ 2428 sk = iso_get_sock(hdev, &hdev->bdaddr, bdaddr, BT_CONNECTED, 2429 iso_match_sync_handle, ev2); 2430 if (sk) { 2431 sock_put(sk); 2432 sk = NULL; 2433 goto done; 2434 } 2435 2436 /* Try to get PA sync socket, if it exists */ 2437 sk = iso_get_sock(hdev, &hdev->bdaddr, bdaddr, BT_CONNECT2, 2438 iso_match_sync_handle, ev2); 2439 if (!sk) 2440 sk = iso_get_sock(hdev, &hdev->bdaddr, bdaddr, 2441 BT_LISTEN, 2442 iso_match_sync_handle, 2443 ev2); 2444 2445 if (sk) { 2446 int err = 0; 2447 bool big_sync; 2448 struct hci_conn *hcon; 2449 2450 lock_sock(sk); 2451 2452 hcon = iso_pi(sk)->conn ? iso_pi(sk)->conn->hcon : NULL; 2453 iso_pi(sk)->qos.bcast.encryption = ev2->encryption; 2454 2455 if (ev2->num_bis < iso_pi(sk)->bc_num_bis) 2456 iso_pi(sk)->bc_num_bis = ev2->num_bis; 2457 2458 big_sync = !test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags) && 2459 !test_and_set_bit(BT_SK_BIG_SYNC, &iso_pi(sk)->flags); 2460 2461 if (big_sync) 2462 err = hci_conn_big_create_sync(hdev, hcon, 2463 &iso_pi(sk)->qos, 2464 iso_pi(sk)->sync_handle, 2465 iso_pi(sk)->bc_num_bis, 2466 iso_pi(sk)->bc_bis); 2467 2468 release_sock(sk); 2469 2470 if (big_sync && err) { 2471 bt_dev_err(hdev, "hci_le_big_create_sync: %d", 2472 err); 2473 sock_put(sk); 2474 sk = NULL; 2475 } 2476 } 2477 2478 goto done; 2479 } 2480 2481 ev3 = hci_recv_event_data(hdev, HCI_EV_LE_PER_ADV_REPORT); 2482 if (ev3) { 2483 size_t base_len = 0; 2484 u8 *base; 2485 struct hci_conn *hcon; 2486 2487 sk = iso_get_sock(hdev, &hdev->bdaddr, bdaddr, BT_LISTEN, 2488 iso_match_sync_handle_pa_report, ev3); 2489 if (!sk) 2490 goto done; 2491 2492 lock_sock(sk); 2493 2494 hcon = iso_pi(sk)->conn ? iso_pi(sk)->conn->hcon : NULL; 2495 if (!hcon) 2496 goto release3; 2497 2498 if (ev3->data_status == LE_PA_DATA_TRUNCATED) { 2499 /* The controller was unable to retrieve PA data. */ 2500 memset(hcon->le_per_adv_data, 0, 2501 HCI_MAX_PER_AD_TOT_LEN); 2502 hcon->le_per_adv_data_len = 0; 2503 hcon->le_per_adv_data_offset = 0; 2504 goto release3; 2505 } 2506 2507 if (hcon->le_per_adv_data_offset + ev3->length > 2508 HCI_MAX_PER_AD_TOT_LEN) 2509 goto release3; 2510 2511 memcpy(hcon->le_per_adv_data + hcon->le_per_adv_data_offset, 2512 ev3->data, ev3->length); 2513 hcon->le_per_adv_data_offset += ev3->length; 2514 2515 if (ev3->data_status == LE_PA_DATA_COMPLETE) { 2516 /* All PA data has been received. */ 2517 hcon->le_per_adv_data_len = 2518 hcon->le_per_adv_data_offset; 2519 hcon->le_per_adv_data_offset = 0; 2520 2521 /* Extract BASE */ 2522 base = eir_get_service_data(hcon->le_per_adv_data, 2523 hcon->le_per_adv_data_len, 2524 EIR_BAA_SERVICE_UUID, 2525 &base_len); 2526 2527 if (!base || base_len > BASE_MAX_LENGTH) 2528 goto release3; 2529 2530 memcpy(iso_pi(sk)->base, base, base_len); 2531 iso_pi(sk)->base_len = base_len; 2532 } else { 2533 /* This is a PA data fragment. Keep pa_data_len set to 0 2534 * until all data has been reassembled. 2535 */ 2536 hcon->le_per_adv_data_len = 0; 2537 } 2538 2539 release3: 2540 release_sock(sk); 2541 } else { 2542 sk = iso_get_sock(hdev, &hdev->bdaddr, BDADDR_ANY, 2543 BT_LISTEN, iso_match_dst, BDADDR_ANY); 2544 } 2545 2546 done: 2547 if (!sk) 2548 return 0; 2549 2550 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) 2551 *flags |= HCI_PROTO_DEFER; 2552 2553 sock_put(sk); 2554 2555 return HCI_LM_ACCEPT; 2556 } 2557 2558 static void iso_connect_cfm(struct hci_conn *hcon, __u8 status) 2559 __must_hold(&hcon->hdev->lock) 2560 { 2561 if (hcon->type != CIS_LINK && hcon->type != BIS_LINK && 2562 hcon->type != PA_LINK) { 2563 if (hcon->type != LE_LINK) 2564 return; 2565 2566 /* Check if LE link has failed */ 2567 if (status) { 2568 struct hci_link *link, *t; 2569 2570 list_for_each_entry_safe(link, t, &hcon->link_list, 2571 list) { 2572 lockdep_assert_held(&link->conn->hdev->lock); 2573 iso_conn_del(link->conn, bt_to_errno(status)); 2574 } 2575 2576 return; 2577 } 2578 2579 /* Create CIS if pending */ 2580 hci_le_create_cis_pending(hcon->hdev); 2581 return; 2582 } 2583 2584 BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status); 2585 2586 /* Similar to the success case, if HCI_CONN_BIG_SYNC_FAILED or 2587 * HCI_CONN_PA_SYNC_FAILED is set, queue the failed connection 2588 * into the accept queue of the listening socket and wake up 2589 * userspace, to inform the user about the event. 2590 */ 2591 if (!status || test_bit(HCI_CONN_BIG_SYNC_FAILED, &hcon->flags) || 2592 test_bit(HCI_CONN_PA_SYNC_FAILED, &hcon->flags)) { 2593 struct iso_conn *conn; 2594 2595 conn = iso_conn_add(hcon); 2596 if (conn) { 2597 iso_conn_ready(conn); 2598 iso_conn_put(conn); 2599 } 2600 } else { 2601 iso_conn_del(hcon, bt_to_errno(status)); 2602 } 2603 } 2604 2605 static void iso_disconn_cfm(struct hci_conn *hcon, __u8 reason) 2606 __must_hold(&hcon->hdev->lock) 2607 { 2608 if (hcon->type != CIS_LINK && hcon->type != BIS_LINK && 2609 hcon->type != PA_LINK) 2610 return; 2611 2612 BT_DBG("hcon %p reason %d", hcon, reason); 2613 2614 iso_conn_del(hcon, bt_to_errno(reason)); 2615 } 2616 2617 int iso_recv(struct hci_dev *hdev, u16 handle, struct sk_buff *skb, u16 flags) 2618 { 2619 struct hci_conn *hcon; 2620 struct iso_conn *conn; 2621 struct skb_shared_hwtstamps *hwts; 2622 __u16 pb, ts, len, sn; 2623 2624 hci_dev_lock(hdev); 2625 2626 hcon = hci_conn_hash_lookup_handle(hdev, handle); 2627 if (!hcon) { 2628 hci_dev_unlock(hdev); 2629 kfree_skb(skb); 2630 return -ENOENT; 2631 } 2632 2633 spin_lock(&hcon->proto_lock); 2634 conn = iso_conn_hold_unless_zero(hcon->iso_data); 2635 spin_unlock(&hcon->proto_lock); 2636 2637 hcon = NULL; 2638 2639 hci_dev_unlock(hdev); 2640 2641 if (!conn) { 2642 kfree_skb(skb); 2643 return -EINVAL; 2644 } 2645 2646 pb = hci_iso_flags_pb(flags); 2647 ts = hci_iso_flags_ts(flags); 2648 2649 BT_DBG("conn %p len %d pb 0x%x ts 0x%x", conn, skb->len, pb, ts); 2650 2651 switch (pb) { 2652 case ISO_START: 2653 case ISO_SINGLE: 2654 if (conn->rx_skb || conn->rx_len) { 2655 BT_ERR("Unexpected start frame (len %d)", skb->len); 2656 kfree_skb(conn->rx_skb); 2657 conn->rx_skb = NULL; 2658 conn->rx_len = 0; 2659 } 2660 2661 if (ts) { 2662 struct hci_iso_ts_data_hdr *hdr; 2663 2664 hdr = skb_pull_data(skb, HCI_ISO_TS_DATA_HDR_SIZE); 2665 if (!hdr) { 2666 BT_ERR("Frame is too short (len %d)", skb->len); 2667 goto drop; 2668 } 2669 2670 /* Record the timestamp to skb */ 2671 hwts = skb_hwtstamps(skb); 2672 hwts->hwtstamp = us_to_ktime(le32_to_cpu(hdr->ts)); 2673 2674 sn = __le16_to_cpu(hdr->sn); 2675 len = __le16_to_cpu(hdr->slen); 2676 } else { 2677 struct hci_iso_data_hdr *hdr; 2678 2679 hdr = skb_pull_data(skb, HCI_ISO_DATA_HDR_SIZE); 2680 if (!hdr) { 2681 BT_ERR("Frame is too short (len %d)", skb->len); 2682 goto drop; 2683 } 2684 2685 sn = __le16_to_cpu(hdr->sn); 2686 len = __le16_to_cpu(hdr->slen); 2687 } 2688 2689 flags = hci_iso_data_flags(len); 2690 len = hci_iso_data_len(len); 2691 2692 BT_DBG("Start: total len %d, frag len %d flags 0x%4.4x sn %d", 2693 len, skb->len, flags, sn); 2694 2695 if (len == skb->len) { 2696 /* Complete frame received */ 2697 hci_skb_pkt_status(skb) = flags & 0x03; 2698 hci_skb_pkt_seqnum(skb) = sn; 2699 iso_recv_frame(conn, skb); 2700 goto done; 2701 } 2702 2703 if (pb == ISO_SINGLE) { 2704 BT_ERR("Frame malformed (len %d, expected len %d)", 2705 skb->len, len); 2706 goto drop; 2707 } 2708 2709 if (skb->len > len) { 2710 BT_ERR("Frame is too long (len %d, expected len %d)", 2711 skb->len, len); 2712 goto drop; 2713 } 2714 2715 /* Allocate skb for the complete frame (with header) */ 2716 conn->rx_skb = bt_skb_alloc(len, GFP_KERNEL); 2717 if (!conn->rx_skb) 2718 goto drop; 2719 2720 hci_skb_pkt_status(conn->rx_skb) = flags & 0x03; 2721 hci_skb_pkt_seqnum(conn->rx_skb) = sn; 2722 skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), 2723 skb->len); 2724 conn->rx_len = len - skb->len; 2725 2726 /* Copy hw timestamp from skb to rx_skb if present */ 2727 if (ts) { 2728 hwts = skb_hwtstamps(conn->rx_skb); 2729 hwts->hwtstamp = skb_hwtstamps(skb)->hwtstamp; 2730 } 2731 2732 break; 2733 2734 case ISO_CONT: 2735 case ISO_END: 2736 BT_DBG("%s: frag len %d (expecting %d)", 2737 (pb == ISO_END) ? "End" : "Cont", skb->len, 2738 conn->rx_len); 2739 2740 if (!conn->rx_skb) { 2741 BT_ERR("Unexpected ISO %s frame (len %d)", 2742 (pb == ISO_END) ? "End" : "Cont", skb->len); 2743 goto drop; 2744 } 2745 2746 if (skb->len > conn->rx_len) { 2747 BT_ERR("Fragment is too long (len %d, expected %d)", 2748 skb->len, conn->rx_len); 2749 kfree_skb(conn->rx_skb); 2750 conn->rx_skb = NULL; 2751 conn->rx_len = 0; 2752 goto drop; 2753 } 2754 2755 skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), 2756 skb->len); 2757 conn->rx_len -= skb->len; 2758 2759 if (pb == ISO_CONT) 2760 break; 2761 2762 if (!conn->rx_len) { 2763 struct sk_buff *rx_skb = conn->rx_skb; 2764 2765 /* Complete frame received. iso_recv_frame 2766 * takes ownership of the skb so set the global 2767 * rx_skb pointer to NULL first. 2768 */ 2769 conn->rx_skb = NULL; 2770 iso_recv_frame(conn, rx_skb); 2771 } else { 2772 BT_ERR("ISO fragment incomplete (len %d, expected %d)", 2773 skb->len, conn->rx_len); 2774 kfree_skb(conn->rx_skb); 2775 conn->rx_skb = NULL; 2776 conn->rx_len = 0; 2777 goto drop; 2778 } 2779 break; 2780 } 2781 2782 drop: 2783 kfree_skb(skb); 2784 done: 2785 iso_conn_put(conn); 2786 return 0; 2787 } 2788 2789 static struct hci_cb iso_cb = { 2790 .name = "ISO", 2791 .connect_cfm = iso_connect_cfm, 2792 .disconn_cfm = iso_disconn_cfm, 2793 }; 2794 2795 static int iso_debugfs_show(struct seq_file *f, void *p) 2796 { 2797 struct sock *sk; 2798 2799 read_lock(&iso_sk_list.lock); 2800 2801 sk_for_each(sk, &iso_sk_list.head) { 2802 seq_printf(f, "%pMR %pMR %d\n", &iso_pi(sk)->src, 2803 &iso_pi(sk)->dst, sk->sk_state); 2804 } 2805 2806 read_unlock(&iso_sk_list.lock); 2807 2808 return 0; 2809 } 2810 2811 DEFINE_SHOW_ATTRIBUTE(iso_debugfs); 2812 2813 static struct dentry *iso_debugfs; 2814 2815 static const struct proto_ops iso_sock_ops = { 2816 .family = PF_BLUETOOTH, 2817 .owner = THIS_MODULE, 2818 .release = iso_sock_release, 2819 .bind = iso_sock_bind, 2820 .connect = iso_sock_connect, 2821 .listen = iso_sock_listen, 2822 .accept = iso_sock_accept, 2823 .getname = iso_sock_getname, 2824 .sendmsg = iso_sock_sendmsg, 2825 .recvmsg = iso_sock_recvmsg, 2826 .poll = bt_sock_poll, 2827 .ioctl = bt_sock_ioctl, 2828 .mmap = sock_no_mmap, 2829 .socketpair = sock_no_socketpair, 2830 .shutdown = iso_sock_shutdown, 2831 .setsockopt = iso_sock_setsockopt, 2832 .getsockopt_iter = iso_sock_getsockopt 2833 }; 2834 2835 static const struct net_proto_family iso_sock_family_ops = { 2836 .family = PF_BLUETOOTH, 2837 .owner = THIS_MODULE, 2838 .create = iso_sock_create, 2839 }; 2840 2841 static bool inited; 2842 2843 bool iso_inited(void) 2844 { 2845 return inited; 2846 } 2847 2848 int iso_init(void) 2849 { 2850 int err; 2851 2852 BUILD_BUG_ON(sizeof(struct sockaddr_iso) > sizeof(struct sockaddr)); 2853 2854 if (inited) 2855 return -EALREADY; 2856 2857 err = proto_register(&iso_proto, 0); 2858 if (err < 0) 2859 return err; 2860 2861 err = bt_sock_register(BTPROTO_ISO, &iso_sock_family_ops); 2862 if (err < 0) { 2863 BT_ERR("ISO socket registration failed"); 2864 goto error; 2865 } 2866 2867 err = bt_procfs_init(&init_net, "iso", &iso_sk_list, NULL); 2868 if (err < 0) { 2869 BT_ERR("Failed to create ISO proc file"); 2870 bt_sock_unregister(BTPROTO_ISO); 2871 goto error; 2872 } 2873 2874 BT_INFO("ISO socket layer initialized"); 2875 2876 hci_register_cb(&iso_cb); 2877 2878 if (!IS_ERR_OR_NULL(bt_debugfs)) 2879 iso_debugfs = debugfs_create_file("iso", 0444, bt_debugfs, 2880 NULL, &iso_debugfs_fops); 2881 2882 inited = true; 2883 2884 return 0; 2885 2886 error: 2887 proto_unregister(&iso_proto); 2888 return err; 2889 } 2890 2891 int iso_exit(void) 2892 { 2893 if (!inited) 2894 return -EALREADY; 2895 2896 bt_procfs_cleanup(&init_net, "iso"); 2897 2898 debugfs_remove(iso_debugfs); 2899 iso_debugfs = NULL; 2900 2901 hci_unregister_cb(&iso_cb); 2902 2903 bt_sock_unregister(BTPROTO_ISO); 2904 2905 proto_unregister(&iso_proto); 2906 2907 inited = false; 2908 2909 return 0; 2910 } 2911