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 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
14 #include <net/bluetooth/bluetooth.h>
15 #include <net/bluetooth/hci_core.h>
16 #include <net/bluetooth/iso.h>
17
18 static const struct proto_ops iso_sock_ops;
19
20 static struct bt_sock_list iso_sk_list = {
21 .lock = __RW_LOCK_UNLOCKED(iso_sk_list.lock)
22 };
23
24 /* ---- ISO connections ---- */
25 struct iso_conn {
26 struct hci_conn *hcon;
27
28 /* @lock: spinlock protecting changes to iso_conn fields */
29 spinlock_t lock;
30 struct sock *sk;
31
32 struct delayed_work timeout_work;
33
34 struct sk_buff *rx_skb;
35 __u32 rx_len;
36 __u16 tx_sn;
37 };
38
39 #define iso_conn_lock(c) spin_lock(&(c)->lock)
40 #define iso_conn_unlock(c) spin_unlock(&(c)->lock)
41
42 static void iso_sock_close(struct sock *sk);
43 static void iso_sock_kill(struct sock *sk);
44
45 /* ----- ISO socket info ----- */
46 #define iso_pi(sk) ((struct iso_pinfo *)sk)
47
48 #define EIR_SERVICE_DATA_LENGTH 4
49 #define BASE_MAX_LENGTH (HCI_MAX_PER_AD_LENGTH - EIR_SERVICE_DATA_LENGTH)
50
51 /* iso_pinfo flags values */
52 enum {
53 BT_SK_BIG_SYNC,
54 BT_SK_PA_SYNC,
55 };
56
57 struct iso_pinfo {
58 struct bt_sock bt;
59 bdaddr_t src;
60 __u8 src_type;
61 bdaddr_t dst;
62 __u8 dst_type;
63 __u8 bc_sid;
64 __u8 bc_num_bis;
65 __u8 bc_bis[ISO_MAX_NUM_BIS];
66 __u16 sync_handle;
67 unsigned long flags;
68 struct bt_iso_qos qos;
69 bool qos_user_set;
70 __u8 base_len;
71 __u8 base[BASE_MAX_LENGTH];
72 struct iso_conn *conn;
73 };
74
75 static struct bt_iso_qos default_qos;
76
77 static bool check_ucast_qos(struct bt_iso_qos *qos);
78 static bool check_bcast_qos(struct bt_iso_qos *qos);
79 static bool iso_match_sid(struct sock *sk, void *data);
80 static void iso_sock_disconn(struct sock *sk);
81
82 /* ---- ISO timers ---- */
83 #define ISO_CONN_TIMEOUT (HZ * 40)
84 #define ISO_DISCONN_TIMEOUT (HZ * 2)
85
iso_sock_timeout(struct work_struct * work)86 static void iso_sock_timeout(struct work_struct *work)
87 {
88 struct iso_conn *conn = container_of(work, struct iso_conn,
89 timeout_work.work);
90 struct sock *sk;
91
92 iso_conn_lock(conn);
93 sk = conn->sk;
94 if (sk)
95 sock_hold(sk);
96 iso_conn_unlock(conn);
97
98 if (!sk)
99 return;
100
101 BT_DBG("sock %p state %d", sk, sk->sk_state);
102
103 lock_sock(sk);
104 sk->sk_err = ETIMEDOUT;
105 sk->sk_state_change(sk);
106 release_sock(sk);
107 sock_put(sk);
108 }
109
iso_sock_set_timer(struct sock * sk,long timeout)110 static void iso_sock_set_timer(struct sock *sk, long timeout)
111 {
112 if (!iso_pi(sk)->conn)
113 return;
114
115 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
116 cancel_delayed_work(&iso_pi(sk)->conn->timeout_work);
117 schedule_delayed_work(&iso_pi(sk)->conn->timeout_work, timeout);
118 }
119
iso_sock_clear_timer(struct sock * sk)120 static void iso_sock_clear_timer(struct sock *sk)
121 {
122 if (!iso_pi(sk)->conn)
123 return;
124
125 BT_DBG("sock %p state %d", sk, sk->sk_state);
126 cancel_delayed_work(&iso_pi(sk)->conn->timeout_work);
127 }
128
129 /* ---- ISO connections ---- */
iso_conn_add(struct hci_conn * hcon)130 static struct iso_conn *iso_conn_add(struct hci_conn *hcon)
131 {
132 struct iso_conn *conn = hcon->iso_data;
133
134 if (conn) {
135 if (!conn->hcon)
136 conn->hcon = hcon;
137 return conn;
138 }
139
140 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
141 if (!conn)
142 return NULL;
143
144 spin_lock_init(&conn->lock);
145 INIT_DELAYED_WORK(&conn->timeout_work, iso_sock_timeout);
146
147 hcon->iso_data = conn;
148 conn->hcon = hcon;
149 conn->tx_sn = 0;
150
151 BT_DBG("hcon %p conn %p", hcon, conn);
152
153 return conn;
154 }
155
156 /* Delete channel. Must be called on the locked socket. */
iso_chan_del(struct sock * sk,int err)157 static void iso_chan_del(struct sock *sk, int err)
158 {
159 struct iso_conn *conn;
160 struct sock *parent;
161
162 conn = iso_pi(sk)->conn;
163
164 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
165
166 if (conn) {
167 iso_conn_lock(conn);
168 conn->sk = NULL;
169 iso_pi(sk)->conn = NULL;
170 iso_conn_unlock(conn);
171
172 if (conn->hcon)
173 hci_conn_drop(conn->hcon);
174 }
175
176 sk->sk_state = BT_CLOSED;
177 sk->sk_err = err;
178
179 parent = bt_sk(sk)->parent;
180 if (parent) {
181 bt_accept_unlink(sk);
182 parent->sk_data_ready(parent);
183 } else {
184 sk->sk_state_change(sk);
185 }
186
187 sock_set_flag(sk, SOCK_ZAPPED);
188 }
189
iso_conn_del(struct hci_conn * hcon,int err)190 static void iso_conn_del(struct hci_conn *hcon, int err)
191 {
192 struct iso_conn *conn = hcon->iso_data;
193 struct sock *sk;
194
195 if (!conn)
196 return;
197
198 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
199
200 /* Kill socket */
201 iso_conn_lock(conn);
202 sk = conn->sk;
203 if (sk)
204 sock_hold(sk);
205 iso_conn_unlock(conn);
206
207 if (sk) {
208 lock_sock(sk);
209 iso_sock_clear_timer(sk);
210 iso_chan_del(sk, err);
211 release_sock(sk);
212 sock_put(sk);
213 }
214
215 /* Ensure no more work items will run before freeing conn. */
216 cancel_delayed_work_sync(&conn->timeout_work);
217
218 hcon->iso_data = NULL;
219 kfree(conn);
220 }
221
__iso_chan_add(struct iso_conn * conn,struct sock * sk,struct sock * parent)222 static int __iso_chan_add(struct iso_conn *conn, struct sock *sk,
223 struct sock *parent)
224 {
225 BT_DBG("conn %p", conn);
226
227 if (iso_pi(sk)->conn == conn && conn->sk == sk)
228 return 0;
229
230 if (conn->sk) {
231 BT_ERR("conn->sk already set");
232 return -EBUSY;
233 }
234
235 iso_pi(sk)->conn = conn;
236 conn->sk = sk;
237
238 if (parent)
239 bt_accept_enqueue(parent, sk, true);
240
241 return 0;
242 }
243
iso_chan_add(struct iso_conn * conn,struct sock * sk,struct sock * parent)244 static int iso_chan_add(struct iso_conn *conn, struct sock *sk,
245 struct sock *parent)
246 {
247 int err;
248
249 iso_conn_lock(conn);
250 err = __iso_chan_add(conn, sk, parent);
251 iso_conn_unlock(conn);
252
253 return err;
254 }
255
le_addr_type(u8 bdaddr_type)256 static inline u8 le_addr_type(u8 bdaddr_type)
257 {
258 if (bdaddr_type == BDADDR_LE_PUBLIC)
259 return ADDR_LE_DEV_PUBLIC;
260 else
261 return ADDR_LE_DEV_RANDOM;
262 }
263
iso_connect_bis(struct sock * sk)264 static int iso_connect_bis(struct sock *sk)
265 {
266 struct iso_conn *conn;
267 struct hci_conn *hcon;
268 struct hci_dev *hdev;
269 int err;
270
271 BT_DBG("%pMR", &iso_pi(sk)->src);
272
273 hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
274 iso_pi(sk)->src_type);
275 if (!hdev)
276 return -EHOSTUNREACH;
277
278 hci_dev_lock(hdev);
279
280 if (!bis_capable(hdev)) {
281 err = -EOPNOTSUPP;
282 goto unlock;
283 }
284
285 /* Fail if user set invalid QoS */
286 if (iso_pi(sk)->qos_user_set && !check_bcast_qos(&iso_pi(sk)->qos)) {
287 iso_pi(sk)->qos = default_qos;
288 err = -EINVAL;
289 goto unlock;
290 }
291
292 /* Fail if out PHYs are marked as disabled */
293 if (!iso_pi(sk)->qos.bcast.out.phy) {
294 err = -EINVAL;
295 goto unlock;
296 }
297
298 /* Just bind if DEFER_SETUP has been set */
299 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
300 hcon = hci_bind_bis(hdev, &iso_pi(sk)->dst,
301 &iso_pi(sk)->qos, iso_pi(sk)->base_len,
302 iso_pi(sk)->base);
303 if (IS_ERR(hcon)) {
304 err = PTR_ERR(hcon);
305 goto unlock;
306 }
307 } else {
308 hcon = hci_connect_bis(hdev, &iso_pi(sk)->dst,
309 le_addr_type(iso_pi(sk)->dst_type),
310 &iso_pi(sk)->qos, iso_pi(sk)->base_len,
311 iso_pi(sk)->base);
312 if (IS_ERR(hcon)) {
313 err = PTR_ERR(hcon);
314 goto unlock;
315 }
316 }
317
318 conn = iso_conn_add(hcon);
319 if (!conn) {
320 hci_conn_drop(hcon);
321 err = -ENOMEM;
322 goto unlock;
323 }
324
325 lock_sock(sk);
326
327 err = iso_chan_add(conn, sk, NULL);
328 if (err) {
329 release_sock(sk);
330 goto unlock;
331 }
332
333 /* Update source addr of the socket */
334 bacpy(&iso_pi(sk)->src, &hcon->src);
335
336 if (hcon->state == BT_CONNECTED) {
337 iso_sock_clear_timer(sk);
338 sk->sk_state = BT_CONNECTED;
339 } else if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
340 iso_sock_clear_timer(sk);
341 sk->sk_state = BT_CONNECT;
342 } else {
343 sk->sk_state = BT_CONNECT;
344 iso_sock_set_timer(sk, sk->sk_sndtimeo);
345 }
346
347 release_sock(sk);
348
349 unlock:
350 hci_dev_unlock(hdev);
351 hci_dev_put(hdev);
352 return err;
353 }
354
iso_connect_cis(struct sock * sk)355 static int iso_connect_cis(struct sock *sk)
356 {
357 struct iso_conn *conn;
358 struct hci_conn *hcon;
359 struct hci_dev *hdev;
360 int err;
361
362 BT_DBG("%pMR -> %pMR", &iso_pi(sk)->src, &iso_pi(sk)->dst);
363
364 hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
365 iso_pi(sk)->src_type);
366 if (!hdev)
367 return -EHOSTUNREACH;
368
369 hci_dev_lock(hdev);
370
371 if (!cis_central_capable(hdev)) {
372 err = -EOPNOTSUPP;
373 goto unlock;
374 }
375
376 /* Fail if user set invalid QoS */
377 if (iso_pi(sk)->qos_user_set && !check_ucast_qos(&iso_pi(sk)->qos)) {
378 iso_pi(sk)->qos = default_qos;
379 err = -EINVAL;
380 goto unlock;
381 }
382
383 /* Fail if either PHYs are marked as disabled */
384 if (!iso_pi(sk)->qos.ucast.in.phy && !iso_pi(sk)->qos.ucast.out.phy) {
385 err = -EINVAL;
386 goto unlock;
387 }
388
389 /* Just bind if DEFER_SETUP has been set */
390 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
391 hcon = hci_bind_cis(hdev, &iso_pi(sk)->dst,
392 le_addr_type(iso_pi(sk)->dst_type),
393 &iso_pi(sk)->qos);
394 if (IS_ERR(hcon)) {
395 err = PTR_ERR(hcon);
396 goto unlock;
397 }
398 } else {
399 hcon = hci_connect_cis(hdev, &iso_pi(sk)->dst,
400 le_addr_type(iso_pi(sk)->dst_type),
401 &iso_pi(sk)->qos);
402 if (IS_ERR(hcon)) {
403 err = PTR_ERR(hcon);
404 goto unlock;
405 }
406 }
407
408 conn = iso_conn_add(hcon);
409 if (!conn) {
410 hci_conn_drop(hcon);
411 err = -ENOMEM;
412 goto unlock;
413 }
414
415 lock_sock(sk);
416
417 err = iso_chan_add(conn, sk, NULL);
418 if (err) {
419 release_sock(sk);
420 goto unlock;
421 }
422
423 /* Update source addr of the socket */
424 bacpy(&iso_pi(sk)->src, &hcon->src);
425
426 if (hcon->state == BT_CONNECTED) {
427 iso_sock_clear_timer(sk);
428 sk->sk_state = BT_CONNECTED;
429 } else if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
430 iso_sock_clear_timer(sk);
431 sk->sk_state = BT_CONNECT;
432 } else {
433 sk->sk_state = BT_CONNECT;
434 iso_sock_set_timer(sk, sk->sk_sndtimeo);
435 }
436
437 release_sock(sk);
438
439 unlock:
440 hci_dev_unlock(hdev);
441 hci_dev_put(hdev);
442 return err;
443 }
444
iso_sock_get_qos(struct sock * sk)445 static struct bt_iso_qos *iso_sock_get_qos(struct sock *sk)
446 {
447 if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONNECT2)
448 return &iso_pi(sk)->conn->hcon->iso_qos;
449
450 return &iso_pi(sk)->qos;
451 }
452
iso_send_frame(struct sock * sk,struct sk_buff * skb)453 static int iso_send_frame(struct sock *sk, struct sk_buff *skb)
454 {
455 struct iso_conn *conn = iso_pi(sk)->conn;
456 struct bt_iso_qos *qos = iso_sock_get_qos(sk);
457 struct hci_iso_data_hdr *hdr;
458 int len = 0;
459
460 BT_DBG("sk %p len %d", sk, skb->len);
461
462 if (skb->len > qos->ucast.out.sdu)
463 return -EMSGSIZE;
464
465 len = skb->len;
466
467 /* Push ISO data header */
468 hdr = skb_push(skb, HCI_ISO_DATA_HDR_SIZE);
469 hdr->sn = cpu_to_le16(conn->tx_sn++);
470 hdr->slen = cpu_to_le16(hci_iso_data_len_pack(len,
471 HCI_ISO_STATUS_VALID));
472
473 if (sk->sk_state == BT_CONNECTED)
474 hci_send_iso(conn->hcon, skb);
475 else
476 len = -ENOTCONN;
477
478 return len;
479 }
480
iso_recv_frame(struct iso_conn * conn,struct sk_buff * skb)481 static void iso_recv_frame(struct iso_conn *conn, struct sk_buff *skb)
482 {
483 struct sock *sk;
484
485 iso_conn_lock(conn);
486 sk = conn->sk;
487 iso_conn_unlock(conn);
488
489 if (!sk)
490 goto drop;
491
492 BT_DBG("sk %p len %d", sk, skb->len);
493
494 if (sk->sk_state != BT_CONNECTED)
495 goto drop;
496
497 if (!sock_queue_rcv_skb(sk, skb))
498 return;
499
500 drop:
501 kfree_skb(skb);
502 }
503
504 /* -------- Socket interface ---------- */
__iso_get_sock_listen_by_addr(bdaddr_t * src,bdaddr_t * dst)505 static struct sock *__iso_get_sock_listen_by_addr(bdaddr_t *src, bdaddr_t *dst)
506 {
507 struct sock *sk;
508
509 sk_for_each(sk, &iso_sk_list.head) {
510 if (sk->sk_state != BT_LISTEN)
511 continue;
512
513 if (bacmp(&iso_pi(sk)->dst, dst))
514 continue;
515
516 if (!bacmp(&iso_pi(sk)->src, src))
517 return sk;
518 }
519
520 return NULL;
521 }
522
__iso_get_sock_listen_by_sid(bdaddr_t * ba,bdaddr_t * bc,__u8 sid)523 static struct sock *__iso_get_sock_listen_by_sid(bdaddr_t *ba, bdaddr_t *bc,
524 __u8 sid)
525 {
526 struct sock *sk;
527
528 sk_for_each(sk, &iso_sk_list.head) {
529 if (sk->sk_state != BT_LISTEN)
530 continue;
531
532 if (bacmp(&iso_pi(sk)->src, ba))
533 continue;
534
535 if (bacmp(&iso_pi(sk)->dst, bc))
536 continue;
537
538 if (iso_pi(sk)->bc_sid == sid)
539 return sk;
540 }
541
542 return NULL;
543 }
544
545 typedef bool (*iso_sock_match_t)(struct sock *sk, void *data);
546
547 /* Find socket listening:
548 * source bdaddr (Unicast)
549 * destination bdaddr (Broadcast only)
550 * match func - pass NULL to ignore
551 * match func data - pass -1 to ignore
552 * Returns closest match.
553 */
iso_get_sock_listen(bdaddr_t * src,bdaddr_t * dst,iso_sock_match_t match,void * data)554 static struct sock *iso_get_sock_listen(bdaddr_t *src, bdaddr_t *dst,
555 iso_sock_match_t match, void *data)
556 {
557 struct sock *sk = NULL, *sk1 = NULL;
558
559 read_lock(&iso_sk_list.lock);
560
561 sk_for_each(sk, &iso_sk_list.head) {
562 if (sk->sk_state != BT_LISTEN)
563 continue;
564
565 /* Match Broadcast destination */
566 if (bacmp(dst, BDADDR_ANY) && bacmp(&iso_pi(sk)->dst, dst))
567 continue;
568
569 /* Use Match function if provided */
570 if (match && !match(sk, data))
571 continue;
572
573 /* Exact match. */
574 if (!bacmp(&iso_pi(sk)->src, src))
575 break;
576
577 /* Closest match */
578 if (!bacmp(&iso_pi(sk)->src, BDADDR_ANY))
579 sk1 = sk;
580 }
581
582 read_unlock(&iso_sk_list.lock);
583
584 return sk ? sk : sk1;
585 }
586
iso_sock_destruct(struct sock * sk)587 static void iso_sock_destruct(struct sock *sk)
588 {
589 BT_DBG("sk %p", sk);
590
591 skb_queue_purge(&sk->sk_receive_queue);
592 skb_queue_purge(&sk->sk_write_queue);
593 }
594
iso_sock_cleanup_listen(struct sock * parent)595 static void iso_sock_cleanup_listen(struct sock *parent)
596 {
597 struct sock *sk;
598
599 BT_DBG("parent %p", parent);
600
601 /* Close not yet accepted channels */
602 while ((sk = bt_accept_dequeue(parent, NULL))) {
603 iso_sock_close(sk);
604 iso_sock_kill(sk);
605 }
606
607 /* If listening socket stands for a PA sync connection,
608 * properly disconnect the hcon and socket.
609 */
610 if (iso_pi(parent)->conn && iso_pi(parent)->conn->hcon &&
611 test_bit(HCI_CONN_PA_SYNC, &iso_pi(parent)->conn->hcon->flags)) {
612 iso_sock_disconn(parent);
613 return;
614 }
615
616 parent->sk_state = BT_CLOSED;
617 sock_set_flag(parent, SOCK_ZAPPED);
618 }
619
620 /* Kill socket (only if zapped and orphan)
621 * Must be called on unlocked socket.
622 */
iso_sock_kill(struct sock * sk)623 static void iso_sock_kill(struct sock *sk)
624 {
625 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket ||
626 sock_flag(sk, SOCK_DEAD))
627 return;
628
629 BT_DBG("sk %p state %d", sk, sk->sk_state);
630
631 /* Kill poor orphan */
632 bt_sock_unlink(&iso_sk_list, sk);
633 sock_set_flag(sk, SOCK_DEAD);
634 sock_put(sk);
635 }
636
iso_sock_disconn(struct sock * sk)637 static void iso_sock_disconn(struct sock *sk)
638 {
639 sk->sk_state = BT_DISCONN;
640 iso_sock_set_timer(sk, ISO_DISCONN_TIMEOUT);
641 iso_conn_lock(iso_pi(sk)->conn);
642 hci_conn_drop(iso_pi(sk)->conn->hcon);
643 iso_pi(sk)->conn->hcon = NULL;
644 iso_conn_unlock(iso_pi(sk)->conn);
645 }
646
__iso_sock_close(struct sock * sk)647 static void __iso_sock_close(struct sock *sk)
648 {
649 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
650
651 switch (sk->sk_state) {
652 case BT_LISTEN:
653 iso_sock_cleanup_listen(sk);
654 break;
655
656 case BT_CONNECT:
657 case BT_CONNECTED:
658 case BT_CONFIG:
659 if (iso_pi(sk)->conn->hcon)
660 iso_sock_disconn(sk);
661 else
662 iso_chan_del(sk, ECONNRESET);
663 break;
664
665 case BT_CONNECT2:
666 if (iso_pi(sk)->conn->hcon &&
667 (test_bit(HCI_CONN_PA_SYNC, &iso_pi(sk)->conn->hcon->flags) ||
668 test_bit(HCI_CONN_PA_SYNC_FAILED, &iso_pi(sk)->conn->hcon->flags)))
669 iso_sock_disconn(sk);
670 else
671 iso_chan_del(sk, ECONNRESET);
672 break;
673 case BT_DISCONN:
674 iso_chan_del(sk, ECONNRESET);
675 break;
676
677 default:
678 sock_set_flag(sk, SOCK_ZAPPED);
679 break;
680 }
681 }
682
683 /* Must be called on unlocked socket. */
iso_sock_close(struct sock * sk)684 static void iso_sock_close(struct sock *sk)
685 {
686 iso_sock_clear_timer(sk);
687 lock_sock(sk);
688 __iso_sock_close(sk);
689 release_sock(sk);
690 iso_sock_kill(sk);
691 }
692
iso_sock_init(struct sock * sk,struct sock * parent)693 static void iso_sock_init(struct sock *sk, struct sock *parent)
694 {
695 BT_DBG("sk %p", sk);
696
697 if (parent) {
698 sk->sk_type = parent->sk_type;
699 bt_sk(sk)->flags = bt_sk(parent)->flags;
700 security_sk_clone(parent, sk);
701 }
702 }
703
704 static struct proto iso_proto = {
705 .name = "ISO",
706 .owner = THIS_MODULE,
707 .obj_size = sizeof(struct iso_pinfo)
708 };
709
710 #define DEFAULT_IO_QOS \
711 { \
712 .interval = 10000u, \
713 .latency = 10u, \
714 .sdu = 40u, \
715 .phy = BT_ISO_PHY_2M, \
716 .rtn = 2u, \
717 }
718
719 static struct bt_iso_qos default_qos = {
720 .bcast = {
721 .big = BT_ISO_QOS_BIG_UNSET,
722 .bis = BT_ISO_QOS_BIS_UNSET,
723 .sync_factor = 0x01,
724 .packing = 0x00,
725 .framing = 0x00,
726 .in = DEFAULT_IO_QOS,
727 .out = DEFAULT_IO_QOS,
728 .encryption = 0x00,
729 .bcode = {0x00},
730 .options = 0x00,
731 .skip = 0x0000,
732 .sync_timeout = 0x4000,
733 .sync_cte_type = 0x00,
734 .mse = 0x00,
735 .timeout = 0x4000,
736 },
737 };
738
iso_sock_alloc(struct net * net,struct socket * sock,int proto,gfp_t prio,int kern)739 static struct sock *iso_sock_alloc(struct net *net, struct socket *sock,
740 int proto, gfp_t prio, int kern)
741 {
742 struct sock *sk;
743
744 sk = bt_sock_alloc(net, sock, &iso_proto, proto, prio, kern);
745 if (!sk)
746 return NULL;
747
748 sk->sk_destruct = iso_sock_destruct;
749 sk->sk_sndtimeo = ISO_CONN_TIMEOUT;
750
751 /* Set address type as public as default src address is BDADDR_ANY */
752 iso_pi(sk)->src_type = BDADDR_LE_PUBLIC;
753
754 iso_pi(sk)->qos = default_qos;
755
756 bt_sock_link(&iso_sk_list, sk);
757 return sk;
758 }
759
iso_sock_create(struct net * net,struct socket * sock,int protocol,int kern)760 static int iso_sock_create(struct net *net, struct socket *sock, int protocol,
761 int kern)
762 {
763 struct sock *sk;
764
765 BT_DBG("sock %p", sock);
766
767 sock->state = SS_UNCONNECTED;
768
769 if (sock->type != SOCK_SEQPACKET)
770 return -ESOCKTNOSUPPORT;
771
772 sock->ops = &iso_sock_ops;
773
774 sk = iso_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
775 if (!sk)
776 return -ENOMEM;
777
778 iso_sock_init(sk, NULL);
779 return 0;
780 }
781
iso_sock_bind_bc(struct socket * sock,struct sockaddr * addr,int addr_len)782 static int iso_sock_bind_bc(struct socket *sock, struct sockaddr *addr,
783 int addr_len)
784 {
785 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
786 struct sock *sk = sock->sk;
787 int i;
788
789 BT_DBG("sk %p bc_sid %u bc_num_bis %u", sk, sa->iso_bc->bc_sid,
790 sa->iso_bc->bc_num_bis);
791
792 if (addr_len > sizeof(*sa) + sizeof(*sa->iso_bc) ||
793 sa->iso_bc->bc_num_bis < 0x01 || sa->iso_bc->bc_num_bis > 0x1f)
794 return -EINVAL;
795
796 bacpy(&iso_pi(sk)->dst, &sa->iso_bc->bc_bdaddr);
797 iso_pi(sk)->dst_type = sa->iso_bc->bc_bdaddr_type;
798 iso_pi(sk)->sync_handle = -1;
799 iso_pi(sk)->bc_sid = sa->iso_bc->bc_sid;
800 iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis;
801
802 for (i = 0; i < iso_pi(sk)->bc_num_bis; i++) {
803 if (sa->iso_bc->bc_bis[i] < 0x01 ||
804 sa->iso_bc->bc_bis[i] > 0x1f)
805 return -EINVAL;
806
807 memcpy(iso_pi(sk)->bc_bis, sa->iso_bc->bc_bis,
808 iso_pi(sk)->bc_num_bis);
809 }
810
811 return 0;
812 }
813
iso_sock_bind(struct socket * sock,struct sockaddr * addr,int addr_len)814 static int iso_sock_bind(struct socket *sock, struct sockaddr *addr,
815 int addr_len)
816 {
817 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
818 struct sock *sk = sock->sk;
819 int err = 0;
820
821 BT_DBG("sk %p %pMR type %u", sk, &sa->iso_bdaddr, sa->iso_bdaddr_type);
822
823 if (!addr || addr_len < sizeof(struct sockaddr_iso) ||
824 addr->sa_family != AF_BLUETOOTH)
825 return -EINVAL;
826
827 lock_sock(sk);
828
829 if (sk->sk_state != BT_OPEN) {
830 err = -EBADFD;
831 goto done;
832 }
833
834 if (sk->sk_type != SOCK_SEQPACKET) {
835 err = -EINVAL;
836 goto done;
837 }
838
839 /* Check if the address type is of LE type */
840 if (!bdaddr_type_is_le(sa->iso_bdaddr_type)) {
841 err = -EINVAL;
842 goto done;
843 }
844
845 bacpy(&iso_pi(sk)->src, &sa->iso_bdaddr);
846 iso_pi(sk)->src_type = sa->iso_bdaddr_type;
847
848 /* Check for Broadcast address */
849 if (addr_len > sizeof(*sa)) {
850 err = iso_sock_bind_bc(sock, addr, addr_len);
851 if (err)
852 goto done;
853 }
854
855 sk->sk_state = BT_BOUND;
856
857 done:
858 release_sock(sk);
859 return err;
860 }
861
iso_sock_connect(struct socket * sock,struct sockaddr * addr,int alen,int flags)862 static int iso_sock_connect(struct socket *sock, struct sockaddr *addr,
863 int alen, int flags)
864 {
865 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
866 struct sock *sk = sock->sk;
867 int err;
868
869 BT_DBG("sk %p", sk);
870
871 if (alen < sizeof(struct sockaddr_iso) ||
872 addr->sa_family != AF_BLUETOOTH)
873 return -EINVAL;
874
875 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
876 return -EBADFD;
877
878 if (sk->sk_type != SOCK_SEQPACKET)
879 return -EINVAL;
880
881 /* Check if the address type is of LE type */
882 if (!bdaddr_type_is_le(sa->iso_bdaddr_type))
883 return -EINVAL;
884
885 lock_sock(sk);
886
887 bacpy(&iso_pi(sk)->dst, &sa->iso_bdaddr);
888 iso_pi(sk)->dst_type = sa->iso_bdaddr_type;
889
890 release_sock(sk);
891
892 if (bacmp(&iso_pi(sk)->dst, BDADDR_ANY))
893 err = iso_connect_cis(sk);
894 else
895 err = iso_connect_bis(sk);
896
897 if (err)
898 return err;
899
900 lock_sock(sk);
901
902 if (!test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
903 err = bt_sock_wait_state(sk, BT_CONNECTED,
904 sock_sndtimeo(sk, flags & O_NONBLOCK));
905 }
906
907 release_sock(sk);
908 return err;
909 }
910
iso_listen_bis(struct sock * sk)911 static int iso_listen_bis(struct sock *sk)
912 {
913 struct hci_dev *hdev;
914 int err = 0;
915
916 BT_DBG("%pMR -> %pMR (SID 0x%2.2x)", &iso_pi(sk)->src,
917 &iso_pi(sk)->dst, iso_pi(sk)->bc_sid);
918
919 write_lock(&iso_sk_list.lock);
920
921 if (__iso_get_sock_listen_by_sid(&iso_pi(sk)->src, &iso_pi(sk)->dst,
922 iso_pi(sk)->bc_sid))
923 err = -EADDRINUSE;
924
925 write_unlock(&iso_sk_list.lock);
926
927 if (err)
928 return err;
929
930 hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
931 iso_pi(sk)->src_type);
932 if (!hdev)
933 return -EHOSTUNREACH;
934
935 /* Fail if user set invalid QoS */
936 if (iso_pi(sk)->qos_user_set && !check_bcast_qos(&iso_pi(sk)->qos)) {
937 iso_pi(sk)->qos = default_qos;
938 return -EINVAL;
939 }
940
941 err = hci_pa_create_sync(hdev, &iso_pi(sk)->dst,
942 le_addr_type(iso_pi(sk)->dst_type),
943 iso_pi(sk)->bc_sid, &iso_pi(sk)->qos);
944
945 hci_dev_put(hdev);
946
947 return err;
948 }
949
iso_listen_cis(struct sock * sk)950 static int iso_listen_cis(struct sock *sk)
951 {
952 int err = 0;
953
954 BT_DBG("%pMR", &iso_pi(sk)->src);
955
956 write_lock(&iso_sk_list.lock);
957
958 if (__iso_get_sock_listen_by_addr(&iso_pi(sk)->src, &iso_pi(sk)->dst))
959 err = -EADDRINUSE;
960
961 write_unlock(&iso_sk_list.lock);
962
963 return err;
964 }
965
iso_sock_listen(struct socket * sock,int backlog)966 static int iso_sock_listen(struct socket *sock, int backlog)
967 {
968 struct sock *sk = sock->sk;
969 int err = 0;
970
971 BT_DBG("sk %p backlog %d", sk, backlog);
972
973 lock_sock(sk);
974
975 if (sk->sk_state != BT_BOUND) {
976 err = -EBADFD;
977 goto done;
978 }
979
980 if (sk->sk_type != SOCK_SEQPACKET) {
981 err = -EINVAL;
982 goto done;
983 }
984
985 if (!bacmp(&iso_pi(sk)->dst, BDADDR_ANY))
986 err = iso_listen_cis(sk);
987 else
988 err = iso_listen_bis(sk);
989
990 if (err)
991 goto done;
992
993 sk->sk_max_ack_backlog = backlog;
994 sk->sk_ack_backlog = 0;
995
996 sk->sk_state = BT_LISTEN;
997
998 done:
999 release_sock(sk);
1000 return err;
1001 }
1002
iso_sock_accept(struct socket * sock,struct socket * newsock,int flags,bool kern)1003 static int iso_sock_accept(struct socket *sock, struct socket *newsock,
1004 int flags, bool kern)
1005 {
1006 DEFINE_WAIT_FUNC(wait, woken_wake_function);
1007 struct sock *sk = sock->sk, *ch;
1008 long timeo;
1009 int err = 0;
1010
1011 lock_sock(sk);
1012
1013 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
1014
1015 BT_DBG("sk %p timeo %ld", sk, timeo);
1016
1017 /* Wait for an incoming connection. (wake-one). */
1018 add_wait_queue_exclusive(sk_sleep(sk), &wait);
1019 while (1) {
1020 if (sk->sk_state != BT_LISTEN) {
1021 err = -EBADFD;
1022 break;
1023 }
1024
1025 ch = bt_accept_dequeue(sk, newsock);
1026 if (ch)
1027 break;
1028
1029 if (!timeo) {
1030 err = -EAGAIN;
1031 break;
1032 }
1033
1034 if (signal_pending(current)) {
1035 err = sock_intr_errno(timeo);
1036 break;
1037 }
1038
1039 release_sock(sk);
1040
1041 timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
1042 lock_sock(sk);
1043 }
1044 remove_wait_queue(sk_sleep(sk), &wait);
1045
1046 if (err)
1047 goto done;
1048
1049 newsock->state = SS_CONNECTED;
1050
1051 BT_DBG("new socket %p", ch);
1052
1053 done:
1054 release_sock(sk);
1055 return err;
1056 }
1057
iso_sock_getname(struct socket * sock,struct sockaddr * addr,int peer)1058 static int iso_sock_getname(struct socket *sock, struct sockaddr *addr,
1059 int peer)
1060 {
1061 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
1062 struct sock *sk = sock->sk;
1063
1064 BT_DBG("sock %p, sk %p", sock, sk);
1065
1066 addr->sa_family = AF_BLUETOOTH;
1067
1068 if (peer) {
1069 bacpy(&sa->iso_bdaddr, &iso_pi(sk)->dst);
1070 sa->iso_bdaddr_type = iso_pi(sk)->dst_type;
1071 } else {
1072 bacpy(&sa->iso_bdaddr, &iso_pi(sk)->src);
1073 sa->iso_bdaddr_type = iso_pi(sk)->src_type;
1074 }
1075
1076 return sizeof(struct sockaddr_iso);
1077 }
1078
iso_sock_sendmsg(struct socket * sock,struct msghdr * msg,size_t len)1079 static int iso_sock_sendmsg(struct socket *sock, struct msghdr *msg,
1080 size_t len)
1081 {
1082 struct sock *sk = sock->sk;
1083 struct sk_buff *skb, **frag;
1084 size_t mtu;
1085 int err;
1086
1087 BT_DBG("sock %p, sk %p", sock, sk);
1088
1089 err = sock_error(sk);
1090 if (err)
1091 return err;
1092
1093 if (msg->msg_flags & MSG_OOB)
1094 return -EOPNOTSUPP;
1095
1096 lock_sock(sk);
1097
1098 if (sk->sk_state != BT_CONNECTED) {
1099 release_sock(sk);
1100 return -ENOTCONN;
1101 }
1102
1103 mtu = iso_pi(sk)->conn->hcon->hdev->iso_mtu;
1104
1105 release_sock(sk);
1106
1107 skb = bt_skb_sendmsg(sk, msg, len, mtu, HCI_ISO_DATA_HDR_SIZE, 0);
1108 if (IS_ERR(skb))
1109 return PTR_ERR(skb);
1110
1111 len -= skb->len;
1112
1113 BT_DBG("skb %p len %d", sk, skb->len);
1114
1115 /* Continuation fragments */
1116 frag = &skb_shinfo(skb)->frag_list;
1117 while (len) {
1118 struct sk_buff *tmp;
1119
1120 tmp = bt_skb_sendmsg(sk, msg, len, mtu, 0, 0);
1121 if (IS_ERR(tmp)) {
1122 kfree_skb(skb);
1123 return PTR_ERR(tmp);
1124 }
1125
1126 *frag = tmp;
1127
1128 len -= tmp->len;
1129
1130 skb->len += tmp->len;
1131 skb->data_len += tmp->len;
1132
1133 BT_DBG("frag %p len %d", *frag, tmp->len);
1134
1135 frag = &(*frag)->next;
1136 }
1137
1138 lock_sock(sk);
1139
1140 if (sk->sk_state == BT_CONNECTED)
1141 err = iso_send_frame(sk, skb);
1142 else
1143 err = -ENOTCONN;
1144
1145 release_sock(sk);
1146
1147 if (err < 0)
1148 kfree_skb(skb);
1149 return err;
1150 }
1151
iso_conn_defer_accept(struct hci_conn * conn)1152 static void iso_conn_defer_accept(struct hci_conn *conn)
1153 {
1154 struct hci_cp_le_accept_cis cp;
1155 struct hci_dev *hdev = conn->hdev;
1156
1157 BT_DBG("conn %p", conn);
1158
1159 conn->state = BT_CONFIG;
1160
1161 cp.handle = cpu_to_le16(conn->handle);
1162
1163 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
1164 }
1165
iso_conn_big_sync(struct sock * sk)1166 static void iso_conn_big_sync(struct sock *sk)
1167 {
1168 int err;
1169 struct hci_dev *hdev;
1170
1171 hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
1172 iso_pi(sk)->src_type);
1173
1174 if (!hdev)
1175 return;
1176
1177 if (!test_and_set_bit(BT_SK_BIG_SYNC, &iso_pi(sk)->flags)) {
1178 err = hci_le_big_create_sync(hdev, iso_pi(sk)->conn->hcon,
1179 &iso_pi(sk)->qos,
1180 iso_pi(sk)->sync_handle,
1181 iso_pi(sk)->bc_num_bis,
1182 iso_pi(sk)->bc_bis);
1183 if (err)
1184 bt_dev_err(hdev, "hci_le_big_create_sync: %d",
1185 err);
1186 }
1187 }
1188
iso_sock_recvmsg(struct socket * sock,struct msghdr * msg,size_t len,int flags)1189 static int iso_sock_recvmsg(struct socket *sock, struct msghdr *msg,
1190 size_t len, int flags)
1191 {
1192 struct sock *sk = sock->sk;
1193 struct iso_pinfo *pi = iso_pi(sk);
1194
1195 BT_DBG("sk %p", sk);
1196
1197 if (test_and_clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
1198 lock_sock(sk);
1199 switch (sk->sk_state) {
1200 case BT_CONNECT2:
1201 if (pi->conn->hcon &&
1202 test_bit(HCI_CONN_PA_SYNC, &pi->conn->hcon->flags)) {
1203 iso_conn_big_sync(sk);
1204 sk->sk_state = BT_LISTEN;
1205 set_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags);
1206 } else {
1207 iso_conn_defer_accept(pi->conn->hcon);
1208 sk->sk_state = BT_CONFIG;
1209 }
1210 release_sock(sk);
1211 return 0;
1212 case BT_CONNECT:
1213 release_sock(sk);
1214 return iso_connect_cis(sk);
1215 default:
1216 release_sock(sk);
1217 break;
1218 }
1219 }
1220
1221 return bt_sock_recvmsg(sock, msg, len, flags);
1222 }
1223
check_io_qos(struct bt_iso_io_qos * qos)1224 static bool check_io_qos(struct bt_iso_io_qos *qos)
1225 {
1226 /* If no PHY is enable SDU must be 0 */
1227 if (!qos->phy && qos->sdu)
1228 return false;
1229
1230 if (qos->interval && (qos->interval < 0xff || qos->interval > 0xfffff))
1231 return false;
1232
1233 if (qos->latency && (qos->latency < 0x05 || qos->latency > 0xfa0))
1234 return false;
1235
1236 if (qos->phy > BT_ISO_PHY_ANY)
1237 return false;
1238
1239 return true;
1240 }
1241
check_ucast_qos(struct bt_iso_qos * qos)1242 static bool check_ucast_qos(struct bt_iso_qos *qos)
1243 {
1244 if (qos->ucast.cig > 0xef && qos->ucast.cig != BT_ISO_QOS_CIG_UNSET)
1245 return false;
1246
1247 if (qos->ucast.cis > 0xef && qos->ucast.cis != BT_ISO_QOS_CIS_UNSET)
1248 return false;
1249
1250 if (qos->ucast.sca > 0x07)
1251 return false;
1252
1253 if (qos->ucast.packing > 0x01)
1254 return false;
1255
1256 if (qos->ucast.framing > 0x01)
1257 return false;
1258
1259 if (!check_io_qos(&qos->ucast.in))
1260 return false;
1261
1262 if (!check_io_qos(&qos->ucast.out))
1263 return false;
1264
1265 return true;
1266 }
1267
check_bcast_qos(struct bt_iso_qos * qos)1268 static bool check_bcast_qos(struct bt_iso_qos *qos)
1269 {
1270 if (qos->bcast.sync_factor == 0x00)
1271 return false;
1272
1273 if (qos->bcast.packing > 0x01)
1274 return false;
1275
1276 if (qos->bcast.framing > 0x01)
1277 return false;
1278
1279 if (!check_io_qos(&qos->bcast.in))
1280 return false;
1281
1282 if (!check_io_qos(&qos->bcast.out))
1283 return false;
1284
1285 if (qos->bcast.encryption > 0x01)
1286 return false;
1287
1288 if (qos->bcast.options > 0x07)
1289 return false;
1290
1291 if (qos->bcast.skip > 0x01f3)
1292 return false;
1293
1294 if (qos->bcast.sync_timeout < 0x000a || qos->bcast.sync_timeout > 0x4000)
1295 return false;
1296
1297 if (qos->bcast.sync_cte_type > 0x1f)
1298 return false;
1299
1300 if (qos->bcast.mse > 0x1f)
1301 return false;
1302
1303 if (qos->bcast.timeout < 0x000a || qos->bcast.timeout > 0x4000)
1304 return false;
1305
1306 return true;
1307 }
1308
iso_sock_setsockopt(struct socket * sock,int level,int optname,sockptr_t optval,unsigned int optlen)1309 static int iso_sock_setsockopt(struct socket *sock, int level, int optname,
1310 sockptr_t optval, unsigned int optlen)
1311 {
1312 struct sock *sk = sock->sk;
1313 int len, err = 0;
1314 struct bt_iso_qos qos = default_qos;
1315 u32 opt;
1316
1317 BT_DBG("sk %p", sk);
1318
1319 lock_sock(sk);
1320
1321 switch (optname) {
1322 case BT_DEFER_SETUP:
1323 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
1324 err = -EINVAL;
1325 break;
1326 }
1327
1328 if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
1329 err = -EFAULT;
1330 break;
1331 }
1332
1333 if (opt)
1334 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
1335 else
1336 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
1337 break;
1338
1339 case BT_PKT_STATUS:
1340 if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
1341 err = -EFAULT;
1342 break;
1343 }
1344
1345 if (opt)
1346 set_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags);
1347 else
1348 clear_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags);
1349 break;
1350
1351 case BT_ISO_QOS:
1352 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
1353 sk->sk_state != BT_CONNECT2) {
1354 err = -EINVAL;
1355 break;
1356 }
1357
1358 len = min_t(unsigned int, sizeof(qos), optlen);
1359
1360 if (copy_from_sockptr(&qos, optval, len)) {
1361 err = -EFAULT;
1362 break;
1363 }
1364
1365 if (len == sizeof(qos.ucast) && !check_ucast_qos(&qos)) {
1366 err = -EINVAL;
1367 break;
1368 }
1369
1370 iso_pi(sk)->qos = qos;
1371 iso_pi(sk)->qos_user_set = true;
1372
1373 break;
1374
1375 case BT_ISO_BASE:
1376 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
1377 sk->sk_state != BT_CONNECT2) {
1378 err = -EINVAL;
1379 break;
1380 }
1381
1382 if (optlen > sizeof(iso_pi(sk)->base)) {
1383 err = -EOVERFLOW;
1384 break;
1385 }
1386
1387 len = min_t(unsigned int, sizeof(iso_pi(sk)->base), optlen);
1388
1389 if (copy_from_sockptr(iso_pi(sk)->base, optval, len)) {
1390 err = -EFAULT;
1391 break;
1392 }
1393
1394 iso_pi(sk)->base_len = len;
1395
1396 break;
1397
1398 default:
1399 err = -ENOPROTOOPT;
1400 break;
1401 }
1402
1403 release_sock(sk);
1404 return err;
1405 }
1406
iso_sock_getsockopt(struct socket * sock,int level,int optname,char __user * optval,int __user * optlen)1407 static int iso_sock_getsockopt(struct socket *sock, int level, int optname,
1408 char __user *optval, int __user *optlen)
1409 {
1410 struct sock *sk = sock->sk;
1411 int len, err = 0;
1412 struct bt_iso_qos *qos;
1413 u8 base_len;
1414 u8 *base;
1415
1416 BT_DBG("sk %p", sk);
1417
1418 if (get_user(len, optlen))
1419 return -EFAULT;
1420
1421 lock_sock(sk);
1422
1423 switch (optname) {
1424 case BT_DEFER_SETUP:
1425 if (sk->sk_state == BT_CONNECTED) {
1426 err = -EINVAL;
1427 break;
1428 }
1429
1430 if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
1431 (u32 __user *)optval))
1432 err = -EFAULT;
1433
1434 break;
1435
1436 case BT_PKT_STATUS:
1437 if (put_user(test_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags),
1438 (int __user *)optval))
1439 err = -EFAULT;
1440 break;
1441
1442 case BT_ISO_QOS:
1443 qos = iso_sock_get_qos(sk);
1444
1445 len = min_t(unsigned int, len, sizeof(*qos));
1446 if (copy_to_user(optval, qos, len))
1447 err = -EFAULT;
1448
1449 break;
1450
1451 case BT_ISO_BASE:
1452 if (sk->sk_state == BT_CONNECTED &&
1453 !bacmp(&iso_pi(sk)->dst, BDADDR_ANY)) {
1454 base_len = iso_pi(sk)->conn->hcon->le_per_adv_data_len;
1455 base = iso_pi(sk)->conn->hcon->le_per_adv_data;
1456 } else {
1457 base_len = iso_pi(sk)->base_len;
1458 base = iso_pi(sk)->base;
1459 }
1460
1461 len = min_t(unsigned int, len, base_len);
1462 if (copy_to_user(optval, base, len))
1463 err = -EFAULT;
1464
1465 break;
1466
1467 default:
1468 err = -ENOPROTOOPT;
1469 break;
1470 }
1471
1472 release_sock(sk);
1473 return err;
1474 }
1475
iso_sock_shutdown(struct socket * sock,int how)1476 static int iso_sock_shutdown(struct socket *sock, int how)
1477 {
1478 struct sock *sk = sock->sk;
1479 int err = 0;
1480
1481 BT_DBG("sock %p, sk %p, how %d", sock, sk, how);
1482
1483 if (!sk)
1484 return 0;
1485
1486 sock_hold(sk);
1487 lock_sock(sk);
1488
1489 switch (how) {
1490 case SHUT_RD:
1491 if (sk->sk_shutdown & RCV_SHUTDOWN)
1492 goto unlock;
1493 sk->sk_shutdown |= RCV_SHUTDOWN;
1494 break;
1495 case SHUT_WR:
1496 if (sk->sk_shutdown & SEND_SHUTDOWN)
1497 goto unlock;
1498 sk->sk_shutdown |= SEND_SHUTDOWN;
1499 break;
1500 case SHUT_RDWR:
1501 if (sk->sk_shutdown & SHUTDOWN_MASK)
1502 goto unlock;
1503 sk->sk_shutdown |= SHUTDOWN_MASK;
1504 break;
1505 }
1506
1507 iso_sock_clear_timer(sk);
1508 __iso_sock_close(sk);
1509
1510 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1511 !(current->flags & PF_EXITING))
1512 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1513
1514 unlock:
1515 release_sock(sk);
1516 sock_put(sk);
1517
1518 return err;
1519 }
1520
iso_sock_release(struct socket * sock)1521 static int iso_sock_release(struct socket *sock)
1522 {
1523 struct sock *sk = sock->sk;
1524 int err = 0;
1525
1526 BT_DBG("sock %p, sk %p", sock, sk);
1527
1528 if (!sk)
1529 return 0;
1530
1531 iso_sock_close(sk);
1532
1533 if (sock_flag(sk, SOCK_LINGER) && READ_ONCE(sk->sk_lingertime) &&
1534 !(current->flags & PF_EXITING)) {
1535 lock_sock(sk);
1536 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1537 release_sock(sk);
1538 }
1539
1540 sock_orphan(sk);
1541 iso_sock_kill(sk);
1542 return err;
1543 }
1544
iso_sock_ready(struct sock * sk)1545 static void iso_sock_ready(struct sock *sk)
1546 {
1547 BT_DBG("sk %p", sk);
1548
1549 if (!sk)
1550 return;
1551
1552 lock_sock(sk);
1553 iso_sock_clear_timer(sk);
1554 sk->sk_state = BT_CONNECTED;
1555 sk->sk_state_change(sk);
1556 release_sock(sk);
1557 }
1558
1559 struct iso_list_data {
1560 struct hci_conn *hcon;
1561 int count;
1562 };
1563
iso_match_big(struct sock * sk,void * data)1564 static bool iso_match_big(struct sock *sk, void *data)
1565 {
1566 struct hci_evt_le_big_sync_estabilished *ev = data;
1567
1568 return ev->handle == iso_pi(sk)->qos.bcast.big;
1569 }
1570
iso_match_pa_sync_flag(struct sock * sk,void * data)1571 static bool iso_match_pa_sync_flag(struct sock *sk, void *data)
1572 {
1573 return test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags);
1574 }
1575
iso_conn_ready(struct iso_conn * conn)1576 static void iso_conn_ready(struct iso_conn *conn)
1577 {
1578 struct sock *parent = NULL;
1579 struct sock *sk = conn->sk;
1580 struct hci_ev_le_big_sync_estabilished *ev = NULL;
1581 struct hci_ev_le_pa_sync_established *ev2 = NULL;
1582 struct hci_conn *hcon;
1583
1584 BT_DBG("conn %p", conn);
1585
1586 if (sk) {
1587 iso_sock_ready(conn->sk);
1588 } else {
1589 hcon = conn->hcon;
1590 if (!hcon)
1591 return;
1592
1593 if (test_bit(HCI_CONN_BIG_SYNC, &hcon->flags) ||
1594 test_bit(HCI_CONN_BIG_SYNC_FAILED, &hcon->flags)) {
1595 ev = hci_recv_event_data(hcon->hdev,
1596 HCI_EVT_LE_BIG_SYNC_ESTABILISHED);
1597
1598 /* Get reference to PA sync parent socket, if it exists */
1599 parent = iso_get_sock_listen(&hcon->src,
1600 &hcon->dst,
1601 iso_match_pa_sync_flag, NULL);
1602 if (!parent && ev)
1603 parent = iso_get_sock_listen(&hcon->src,
1604 &hcon->dst,
1605 iso_match_big, ev);
1606 } else if (test_bit(HCI_CONN_PA_SYNC, &hcon->flags) ||
1607 test_bit(HCI_CONN_PA_SYNC_FAILED, &hcon->flags)) {
1608 ev2 = hci_recv_event_data(hcon->hdev,
1609 HCI_EV_LE_PA_SYNC_ESTABLISHED);
1610 if (ev2)
1611 parent = iso_get_sock_listen(&hcon->src,
1612 &hcon->dst,
1613 iso_match_sid, ev2);
1614 }
1615
1616 if (!parent)
1617 parent = iso_get_sock_listen(&hcon->src,
1618 BDADDR_ANY, NULL, NULL);
1619
1620 if (!parent)
1621 return;
1622
1623 lock_sock(parent);
1624
1625 sk = iso_sock_alloc(sock_net(parent), NULL,
1626 BTPROTO_ISO, GFP_ATOMIC, 0);
1627 if (!sk) {
1628 release_sock(parent);
1629 return;
1630 }
1631
1632 iso_sock_init(sk, parent);
1633
1634 bacpy(&iso_pi(sk)->src, &hcon->src);
1635
1636 /* Convert from HCI to three-value type */
1637 if (hcon->src_type == ADDR_LE_DEV_PUBLIC)
1638 iso_pi(sk)->src_type = BDADDR_LE_PUBLIC;
1639 else
1640 iso_pi(sk)->src_type = BDADDR_LE_RANDOM;
1641
1642 /* If hcon has no destination address (BDADDR_ANY) it means it
1643 * was created by HCI_EV_LE_BIG_SYNC_ESTABILISHED or
1644 * HCI_EV_LE_PA_SYNC_ESTABLISHED so we need to initialize using
1645 * the parent socket destination address.
1646 */
1647 if (!bacmp(&hcon->dst, BDADDR_ANY)) {
1648 bacpy(&hcon->dst, &iso_pi(parent)->dst);
1649 hcon->dst_type = iso_pi(parent)->dst_type;
1650 hcon->sync_handle = iso_pi(parent)->sync_handle;
1651 }
1652
1653 if (ev2 && !ev2->status) {
1654 iso_pi(sk)->sync_handle = iso_pi(parent)->sync_handle;
1655 iso_pi(sk)->qos = iso_pi(parent)->qos;
1656 iso_pi(sk)->bc_num_bis = iso_pi(parent)->bc_num_bis;
1657 memcpy(iso_pi(sk)->bc_bis, iso_pi(parent)->bc_bis, ISO_MAX_NUM_BIS);
1658 }
1659
1660 bacpy(&iso_pi(sk)->dst, &hcon->dst);
1661 iso_pi(sk)->dst_type = hcon->dst_type;
1662 iso_pi(sk)->sync_handle = iso_pi(parent)->sync_handle;
1663 memcpy(iso_pi(sk)->base, iso_pi(parent)->base, iso_pi(parent)->base_len);
1664 iso_pi(sk)->base_len = iso_pi(parent)->base_len;
1665
1666 hci_conn_hold(hcon);
1667 iso_chan_add(conn, sk, parent);
1668
1669 if ((ev && ((struct hci_evt_le_big_sync_estabilished *)ev)->status) ||
1670 (ev2 && ev2->status)) {
1671 /* Trigger error signal on child socket */
1672 sk->sk_err = ECONNREFUSED;
1673 sk->sk_error_report(sk);
1674 }
1675
1676 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1677 sk->sk_state = BT_CONNECT2;
1678 else
1679 sk->sk_state = BT_CONNECTED;
1680
1681 /* Wake up parent */
1682 parent->sk_data_ready(parent);
1683
1684 release_sock(parent);
1685 }
1686 }
1687
iso_match_sid(struct sock * sk,void * data)1688 static bool iso_match_sid(struct sock *sk, void *data)
1689 {
1690 struct hci_ev_le_pa_sync_established *ev = data;
1691
1692 return ev->sid == iso_pi(sk)->bc_sid;
1693 }
1694
iso_match_sync_handle(struct sock * sk,void * data)1695 static bool iso_match_sync_handle(struct sock *sk, void *data)
1696 {
1697 struct hci_evt_le_big_info_adv_report *ev = data;
1698
1699 return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle;
1700 }
1701
iso_match_sync_handle_pa_report(struct sock * sk,void * data)1702 static bool iso_match_sync_handle_pa_report(struct sock *sk, void *data)
1703 {
1704 struct hci_ev_le_per_adv_report *ev = data;
1705
1706 return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle;
1707 }
1708
1709 /* ----- ISO interface with lower layer (HCI) ----- */
1710
iso_connect_ind(struct hci_dev * hdev,bdaddr_t * bdaddr,__u8 * flags)1711 int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1712 {
1713 struct hci_ev_le_pa_sync_established *ev1;
1714 struct hci_evt_le_big_info_adv_report *ev2;
1715 struct hci_ev_le_per_adv_report *ev3;
1716 struct sock *sk;
1717 int lm = 0;
1718
1719 bt_dev_dbg(hdev, "bdaddr %pMR", bdaddr);
1720
1721 /* Broadcast receiver requires handling of some events before it can
1722 * proceed to establishing a BIG sync:
1723 *
1724 * 1. HCI_EV_LE_PA_SYNC_ESTABLISHED: The socket may specify a specific
1725 * SID to listen to and once sync is estabilished its handle needs to
1726 * be stored in iso_pi(sk)->sync_handle so it can be matched once
1727 * receiving the BIG Info.
1728 * 2. HCI_EVT_LE_BIG_INFO_ADV_REPORT: When connect_ind is triggered by a
1729 * a BIG Info it attempts to check if there any listening socket with
1730 * the same sync_handle and if it does then attempt to create a sync.
1731 * 3. HCI_EV_LE_PER_ADV_REPORT: When a PA report is received, it is stored
1732 * in iso_pi(sk)->base so it can be passed up to user, in the case of a
1733 * broadcast sink.
1734 */
1735 ev1 = hci_recv_event_data(hdev, HCI_EV_LE_PA_SYNC_ESTABLISHED);
1736 if (ev1) {
1737 sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr, iso_match_sid,
1738 ev1);
1739 if (sk && !ev1->status)
1740 iso_pi(sk)->sync_handle = le16_to_cpu(ev1->handle);
1741
1742 goto done;
1743 }
1744
1745 ev2 = hci_recv_event_data(hdev, HCI_EVT_LE_BIG_INFO_ADV_REPORT);
1746 if (ev2) {
1747 /* Try to get PA sync listening socket, if it exists */
1748 sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr,
1749 iso_match_pa_sync_flag, NULL);
1750 if (!sk)
1751 sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr,
1752 iso_match_sync_handle, ev2);
1753 if (sk) {
1754 int err;
1755
1756 if (ev2->num_bis < iso_pi(sk)->bc_num_bis)
1757 iso_pi(sk)->bc_num_bis = ev2->num_bis;
1758
1759 if (!test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags) &&
1760 !test_and_set_bit(BT_SK_BIG_SYNC, &iso_pi(sk)->flags)) {
1761 err = hci_le_big_create_sync(hdev, NULL,
1762 &iso_pi(sk)->qos,
1763 iso_pi(sk)->sync_handle,
1764 iso_pi(sk)->bc_num_bis,
1765 iso_pi(sk)->bc_bis);
1766 if (err) {
1767 bt_dev_err(hdev, "hci_le_big_create_sync: %d",
1768 err);
1769 sk = NULL;
1770 }
1771 }
1772 }
1773 }
1774
1775 ev3 = hci_recv_event_data(hdev, HCI_EV_LE_PER_ADV_REPORT);
1776 if (ev3) {
1777 sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr,
1778 iso_match_sync_handle_pa_report, ev3);
1779
1780 if (sk) {
1781 memcpy(iso_pi(sk)->base, ev3->data, ev3->length);
1782 iso_pi(sk)->base_len = ev3->length;
1783 }
1784 } else {
1785 sk = iso_get_sock_listen(&hdev->bdaddr, BDADDR_ANY, NULL, NULL);
1786 }
1787
1788 done:
1789 if (!sk)
1790 return lm;
1791
1792 lm |= HCI_LM_ACCEPT;
1793
1794 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1795 *flags |= HCI_PROTO_DEFER;
1796
1797 return lm;
1798 }
1799
iso_connect_cfm(struct hci_conn * hcon,__u8 status)1800 static void iso_connect_cfm(struct hci_conn *hcon, __u8 status)
1801 {
1802 if (hcon->type != ISO_LINK) {
1803 if (hcon->type != LE_LINK)
1804 return;
1805
1806 /* Check if LE link has failed */
1807 if (status) {
1808 struct hci_link *link, *t;
1809
1810 list_for_each_entry_safe(link, t, &hcon->link_list,
1811 list)
1812 iso_conn_del(link->conn, bt_to_errno(status));
1813
1814 return;
1815 }
1816
1817 /* Create CIS if pending */
1818 hci_le_create_cis_pending(hcon->hdev);
1819 return;
1820 }
1821
1822 BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
1823
1824 /* Similar to the success case, if HCI_CONN_BIG_SYNC_FAILED or
1825 * HCI_CONN_PA_SYNC_FAILED is set, queue the failed connection
1826 * into the accept queue of the listening socket and wake up
1827 * userspace, to inform the user about the event.
1828 */
1829 if (!status || test_bit(HCI_CONN_BIG_SYNC_FAILED, &hcon->flags) ||
1830 test_bit(HCI_CONN_PA_SYNC_FAILED, &hcon->flags)) {
1831 struct iso_conn *conn;
1832
1833 conn = iso_conn_add(hcon);
1834 if (conn)
1835 iso_conn_ready(conn);
1836 } else {
1837 iso_conn_del(hcon, bt_to_errno(status));
1838 }
1839 }
1840
iso_disconn_cfm(struct hci_conn * hcon,__u8 reason)1841 static void iso_disconn_cfm(struct hci_conn *hcon, __u8 reason)
1842 {
1843 if (hcon->type != ISO_LINK)
1844 return;
1845
1846 BT_DBG("hcon %p reason %d", hcon, reason);
1847
1848 iso_conn_del(hcon, bt_to_errno(reason));
1849 }
1850
iso_recv(struct hci_conn * hcon,struct sk_buff * skb,u16 flags)1851 void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
1852 {
1853 struct iso_conn *conn = hcon->iso_data;
1854 __u16 pb, ts, len;
1855
1856 if (!conn)
1857 goto drop;
1858
1859 pb = hci_iso_flags_pb(flags);
1860 ts = hci_iso_flags_ts(flags);
1861
1862 BT_DBG("conn %p len %d pb 0x%x ts 0x%x", conn, skb->len, pb, ts);
1863
1864 switch (pb) {
1865 case ISO_START:
1866 case ISO_SINGLE:
1867 if (conn->rx_len) {
1868 BT_ERR("Unexpected start frame (len %d)", skb->len);
1869 kfree_skb(conn->rx_skb);
1870 conn->rx_skb = NULL;
1871 conn->rx_len = 0;
1872 }
1873
1874 if (ts) {
1875 struct hci_iso_ts_data_hdr *hdr;
1876
1877 /* TODO: add timestamp to the packet? */
1878 hdr = skb_pull_data(skb, HCI_ISO_TS_DATA_HDR_SIZE);
1879 if (!hdr) {
1880 BT_ERR("Frame is too short (len %d)", skb->len);
1881 goto drop;
1882 }
1883
1884 len = __le16_to_cpu(hdr->slen);
1885 } else {
1886 struct hci_iso_data_hdr *hdr;
1887
1888 hdr = skb_pull_data(skb, HCI_ISO_DATA_HDR_SIZE);
1889 if (!hdr) {
1890 BT_ERR("Frame is too short (len %d)", skb->len);
1891 goto drop;
1892 }
1893
1894 len = __le16_to_cpu(hdr->slen);
1895 }
1896
1897 flags = hci_iso_data_flags(len);
1898 len = hci_iso_data_len(len);
1899
1900 BT_DBG("Start: total len %d, frag len %d flags 0x%4.4x", len,
1901 skb->len, flags);
1902
1903 if (len == skb->len) {
1904 /* Complete frame received */
1905 hci_skb_pkt_status(skb) = flags & 0x03;
1906 iso_recv_frame(conn, skb);
1907 return;
1908 }
1909
1910 if (pb == ISO_SINGLE) {
1911 BT_ERR("Frame malformed (len %d, expected len %d)",
1912 skb->len, len);
1913 goto drop;
1914 }
1915
1916 if (skb->len > len) {
1917 BT_ERR("Frame is too long (len %d, expected len %d)",
1918 skb->len, len);
1919 goto drop;
1920 }
1921
1922 /* Allocate skb for the complete frame (with header) */
1923 conn->rx_skb = bt_skb_alloc(len, GFP_KERNEL);
1924 if (!conn->rx_skb)
1925 goto drop;
1926
1927 hci_skb_pkt_status(conn->rx_skb) = flags & 0x03;
1928 skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
1929 skb->len);
1930 conn->rx_len = len - skb->len;
1931 break;
1932
1933 case ISO_CONT:
1934 BT_DBG("Cont: frag len %d (expecting %d)", skb->len,
1935 conn->rx_len);
1936
1937 if (!conn->rx_len) {
1938 BT_ERR("Unexpected continuation frame (len %d)",
1939 skb->len);
1940 goto drop;
1941 }
1942
1943 if (skb->len > conn->rx_len) {
1944 BT_ERR("Fragment is too long (len %d, expected %d)",
1945 skb->len, conn->rx_len);
1946 kfree_skb(conn->rx_skb);
1947 conn->rx_skb = NULL;
1948 conn->rx_len = 0;
1949 goto drop;
1950 }
1951
1952 skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
1953 skb->len);
1954 conn->rx_len -= skb->len;
1955 return;
1956
1957 case ISO_END:
1958 skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
1959 skb->len);
1960 conn->rx_len -= skb->len;
1961
1962 if (!conn->rx_len) {
1963 struct sk_buff *rx_skb = conn->rx_skb;
1964
1965 /* Complete frame received. iso_recv_frame
1966 * takes ownership of the skb so set the global
1967 * rx_skb pointer to NULL first.
1968 */
1969 conn->rx_skb = NULL;
1970 iso_recv_frame(conn, rx_skb);
1971 }
1972 break;
1973 }
1974
1975 drop:
1976 kfree_skb(skb);
1977 }
1978
1979 static struct hci_cb iso_cb = {
1980 .name = "ISO",
1981 .connect_cfm = iso_connect_cfm,
1982 .disconn_cfm = iso_disconn_cfm,
1983 };
1984
iso_debugfs_show(struct seq_file * f,void * p)1985 static int iso_debugfs_show(struct seq_file *f, void *p)
1986 {
1987 struct sock *sk;
1988
1989 read_lock(&iso_sk_list.lock);
1990
1991 sk_for_each(sk, &iso_sk_list.head) {
1992 seq_printf(f, "%pMR %pMR %d\n", &iso_pi(sk)->src,
1993 &iso_pi(sk)->dst, sk->sk_state);
1994 }
1995
1996 read_unlock(&iso_sk_list.lock);
1997
1998 return 0;
1999 }
2000
2001 DEFINE_SHOW_ATTRIBUTE(iso_debugfs);
2002
2003 static struct dentry *iso_debugfs;
2004
2005 static const struct proto_ops iso_sock_ops = {
2006 .family = PF_BLUETOOTH,
2007 .owner = THIS_MODULE,
2008 .release = iso_sock_release,
2009 .bind = iso_sock_bind,
2010 .connect = iso_sock_connect,
2011 .listen = iso_sock_listen,
2012 .accept = iso_sock_accept,
2013 .getname = iso_sock_getname,
2014 .sendmsg = iso_sock_sendmsg,
2015 .recvmsg = iso_sock_recvmsg,
2016 .poll = bt_sock_poll,
2017 .ioctl = bt_sock_ioctl,
2018 .mmap = sock_no_mmap,
2019 .socketpair = sock_no_socketpair,
2020 .shutdown = iso_sock_shutdown,
2021 .setsockopt = iso_sock_setsockopt,
2022 .getsockopt = iso_sock_getsockopt
2023 };
2024
2025 static const struct net_proto_family iso_sock_family_ops = {
2026 .family = PF_BLUETOOTH,
2027 .owner = THIS_MODULE,
2028 .create = iso_sock_create,
2029 };
2030
2031 static bool iso_inited;
2032
iso_enabled(void)2033 bool iso_enabled(void)
2034 {
2035 return iso_inited;
2036 }
2037
iso_init(void)2038 int iso_init(void)
2039 {
2040 int err;
2041
2042 BUILD_BUG_ON(sizeof(struct sockaddr_iso) > sizeof(struct sockaddr));
2043
2044 if (iso_inited)
2045 return -EALREADY;
2046
2047 err = proto_register(&iso_proto, 0);
2048 if (err < 0)
2049 return err;
2050
2051 err = bt_sock_register(BTPROTO_ISO, &iso_sock_family_ops);
2052 if (err < 0) {
2053 BT_ERR("ISO socket registration failed");
2054 goto error;
2055 }
2056
2057 err = bt_procfs_init(&init_net, "iso", &iso_sk_list, NULL);
2058 if (err < 0) {
2059 BT_ERR("Failed to create ISO proc file");
2060 bt_sock_unregister(BTPROTO_ISO);
2061 goto error;
2062 }
2063
2064 BT_INFO("ISO socket layer initialized");
2065
2066 hci_register_cb(&iso_cb);
2067
2068 if (IS_ERR_OR_NULL(bt_debugfs))
2069 return 0;
2070
2071 if (!iso_debugfs) {
2072 iso_debugfs = debugfs_create_file("iso", 0444, bt_debugfs,
2073 NULL, &iso_debugfs_fops);
2074 }
2075
2076 iso_inited = true;
2077
2078 return 0;
2079
2080 error:
2081 proto_unregister(&iso_proto);
2082 return err;
2083 }
2084
iso_exit(void)2085 int iso_exit(void)
2086 {
2087 if (!iso_inited)
2088 return -EALREADY;
2089
2090 bt_procfs_cleanup(&init_net, "iso");
2091
2092 debugfs_remove(iso_debugfs);
2093 iso_debugfs = NULL;
2094
2095 hci_unregister_cb(&iso_cb);
2096
2097 bt_sock_unregister(BTPROTO_ISO);
2098
2099 proto_unregister(&iso_proto);
2100
2101 iso_inited = false;
2102
2103 return 0;
2104 }
2105
