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 | |
14 | #include <net/bluetooth/bluetooth.h> |
15 | #include <net/bluetooth/hci_core.h> |
16 | #include <net/bluetooth/iso.h> |
17 | #include "eir.h" |
18 | |
19 | static const struct proto_ops iso_sock_ops; |
20 | |
21 | static struct bt_sock_list iso_sk_list = { |
22 | .lock = __RW_LOCK_UNLOCKED(iso_sk_list.lock) |
23 | }; |
24 | |
25 | /* ---- ISO connections ---- */ |
26 | struct iso_conn { |
27 | struct hci_conn *hcon; |
28 | |
29 | /* @lock: spinlock protecting changes to iso_conn fields */ |
30 | spinlock_t lock; |
31 | struct sock *sk; |
32 | |
33 | struct delayed_work timeout_work; |
34 | |
35 | struct sk_buff *rx_skb; |
36 | __u32 rx_len; |
37 | __u16 tx_sn; |
38 | }; |
39 | |
40 | #define iso_conn_lock(c) spin_lock(&(c)->lock) |
41 | #define iso_conn_unlock(c) spin_unlock(&(c)->lock) |
42 | |
43 | static void iso_sock_close(struct sock *sk); |
44 | static void iso_sock_kill(struct sock *sk); |
45 | |
46 | /* ----- ISO socket info ----- */ |
47 | #define iso_pi(sk) ((struct iso_pinfo *)sk) |
48 | |
49 | #define EIR_SERVICE_DATA_LENGTH 4 |
50 | #define BASE_MAX_LENGTH (HCI_MAX_PER_AD_LENGTH - EIR_SERVICE_DATA_LENGTH) |
51 | #define EIR_BAA_SERVICE_UUID 0x1851 |
52 | |
53 | /* iso_pinfo flags values */ |
54 | enum { |
55 | BT_SK_BIG_SYNC, |
56 | BT_SK_PA_SYNC, |
57 | BT_SK_PA_SYNC_TERM, |
58 | }; |
59 | |
60 | struct iso_pinfo { |
61 | struct bt_sock bt; |
62 | bdaddr_t src; |
63 | __u8 src_type; |
64 | bdaddr_t dst; |
65 | __u8 dst_type; |
66 | __u8 bc_sid; |
67 | __u8 bc_num_bis; |
68 | __u8 bc_bis[ISO_MAX_NUM_BIS]; |
69 | __u16 sync_handle; |
70 | unsigned long flags; |
71 | struct bt_iso_qos qos; |
72 | bool qos_user_set; |
73 | __u8 base_len; |
74 | __u8 base[BASE_MAX_LENGTH]; |
75 | struct iso_conn *conn; |
76 | }; |
77 | |
78 | static struct bt_iso_qos default_qos; |
79 | |
80 | static bool check_ucast_qos(struct bt_iso_qos *qos); |
81 | static bool check_bcast_qos(struct bt_iso_qos *qos); |
82 | static bool iso_match_sid(struct sock *sk, void *data); |
83 | static bool iso_match_sync_handle(struct sock *sk, void *data); |
84 | static void iso_sock_disconn(struct sock *sk); |
85 | |
86 | typedef bool (*iso_sock_match_t)(struct sock *sk, void *data); |
87 | |
88 | static struct sock *iso_get_sock_listen(bdaddr_t *src, bdaddr_t *dst, |
89 | iso_sock_match_t match, void *data); |
90 | |
91 | /* ---- ISO timers ---- */ |
92 | #define ISO_CONN_TIMEOUT (HZ * 40) |
93 | #define ISO_DISCONN_TIMEOUT (HZ * 2) |
94 | |
95 | static void iso_sock_timeout(struct work_struct *work) |
96 | { |
97 | struct iso_conn *conn = container_of(work, struct iso_conn, |
98 | timeout_work.work); |
99 | struct sock *sk; |
100 | |
101 | iso_conn_lock(conn); |
102 | sk = conn->sk; |
103 | if (sk) |
104 | sock_hold(sk); |
105 | iso_conn_unlock(conn); |
106 | |
107 | if (!sk) |
108 | return; |
109 | |
110 | BT_DBG("sock %p state %d" , sk, sk->sk_state); |
111 | |
112 | lock_sock(sk); |
113 | sk->sk_err = ETIMEDOUT; |
114 | sk->sk_state_change(sk); |
115 | release_sock(sk); |
116 | sock_put(sk); |
117 | } |
118 | |
119 | static void iso_sock_set_timer(struct sock *sk, long timeout) |
120 | { |
121 | if (!iso_pi(sk)->conn) |
122 | return; |
123 | |
124 | BT_DBG("sock %p state %d timeout %ld" , sk, sk->sk_state, timeout); |
125 | cancel_delayed_work(dwork: &iso_pi(sk)->conn->timeout_work); |
126 | schedule_delayed_work(dwork: &iso_pi(sk)->conn->timeout_work, delay: timeout); |
127 | } |
128 | |
129 | static void iso_sock_clear_timer(struct sock *sk) |
130 | { |
131 | if (!iso_pi(sk)->conn) |
132 | return; |
133 | |
134 | BT_DBG("sock %p state %d" , sk, sk->sk_state); |
135 | cancel_delayed_work(dwork: &iso_pi(sk)->conn->timeout_work); |
136 | } |
137 | |
138 | /* ---- ISO connections ---- */ |
139 | static struct iso_conn *iso_conn_add(struct hci_conn *hcon) |
140 | { |
141 | struct iso_conn *conn = hcon->iso_data; |
142 | |
143 | if (conn) { |
144 | if (!conn->hcon) |
145 | conn->hcon = hcon; |
146 | return conn; |
147 | } |
148 | |
149 | conn = kzalloc(size: sizeof(*conn), GFP_KERNEL); |
150 | if (!conn) |
151 | return NULL; |
152 | |
153 | spin_lock_init(&conn->lock); |
154 | INIT_DELAYED_WORK(&conn->timeout_work, iso_sock_timeout); |
155 | |
156 | hcon->iso_data = conn; |
157 | conn->hcon = hcon; |
158 | conn->tx_sn = 0; |
159 | |
160 | BT_DBG("hcon %p conn %p" , hcon, conn); |
161 | |
162 | return conn; |
163 | } |
164 | |
165 | /* Delete channel. Must be called on the locked socket. */ |
166 | static void iso_chan_del(struct sock *sk, int err) |
167 | { |
168 | struct iso_conn *conn; |
169 | struct sock *parent; |
170 | |
171 | conn = iso_pi(sk)->conn; |
172 | |
173 | BT_DBG("sk %p, conn %p, err %d" , sk, conn, err); |
174 | |
175 | if (conn) { |
176 | iso_conn_lock(conn); |
177 | conn->sk = NULL; |
178 | iso_pi(sk)->conn = NULL; |
179 | iso_conn_unlock(conn); |
180 | |
181 | if (conn->hcon) |
182 | hci_conn_drop(conn: conn->hcon); |
183 | } |
184 | |
185 | sk->sk_state = BT_CLOSED; |
186 | sk->sk_err = err; |
187 | |
188 | parent = bt_sk(sk)->parent; |
189 | if (parent) { |
190 | bt_accept_unlink(sk); |
191 | parent->sk_data_ready(parent); |
192 | } else { |
193 | sk->sk_state_change(sk); |
194 | } |
195 | |
196 | sock_set_flag(sk, flag: SOCK_ZAPPED); |
197 | } |
198 | |
199 | static bool iso_match_conn_sync_handle(struct sock *sk, void *data) |
200 | { |
201 | struct hci_conn *hcon = data; |
202 | |
203 | if (test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags)) |
204 | return false; |
205 | |
206 | return hcon->sync_handle == iso_pi(sk)->sync_handle; |
207 | } |
208 | |
209 | static void iso_conn_del(struct hci_conn *hcon, int err) |
210 | { |
211 | struct iso_conn *conn = hcon->iso_data; |
212 | struct sock *sk; |
213 | struct sock *parent; |
214 | |
215 | if (!conn) |
216 | return; |
217 | |
218 | BT_DBG("hcon %p conn %p, err %d" , hcon, conn, err); |
219 | |
220 | /* Kill socket */ |
221 | iso_conn_lock(conn); |
222 | sk = conn->sk; |
223 | if (sk) |
224 | sock_hold(sk); |
225 | iso_conn_unlock(conn); |
226 | |
227 | if (sk) { |
228 | lock_sock(sk); |
229 | |
230 | /* While a PA sync hcon is in the process of closing, |
231 | * mark parent socket with a flag, so that any residual |
232 | * BIGInfo adv reports that arrive before PA sync is |
233 | * terminated are not processed anymore. |
234 | */ |
235 | if (test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags)) { |
236 | parent = iso_get_sock_listen(src: &hcon->src, |
237 | dst: &hcon->dst, |
238 | match: iso_match_conn_sync_handle, |
239 | data: hcon); |
240 | |
241 | if (parent) { |
242 | set_bit(nr: BT_SK_PA_SYNC_TERM, |
243 | addr: &iso_pi(parent)->flags); |
244 | sock_put(sk: parent); |
245 | } |
246 | } |
247 | |
248 | iso_sock_clear_timer(sk); |
249 | iso_chan_del(sk, err); |
250 | release_sock(sk); |
251 | sock_put(sk); |
252 | } |
253 | |
254 | /* Ensure no more work items will run before freeing conn. */ |
255 | cancel_delayed_work_sync(dwork: &conn->timeout_work); |
256 | |
257 | hcon->iso_data = NULL; |
258 | kfree(objp: conn); |
259 | } |
260 | |
261 | static int __iso_chan_add(struct iso_conn *conn, struct sock *sk, |
262 | struct sock *parent) |
263 | { |
264 | BT_DBG("conn %p" , conn); |
265 | |
266 | if (iso_pi(sk)->conn == conn && conn->sk == sk) |
267 | return 0; |
268 | |
269 | if (conn->sk) { |
270 | BT_ERR("conn->sk already set" ); |
271 | return -EBUSY; |
272 | } |
273 | |
274 | iso_pi(sk)->conn = conn; |
275 | conn->sk = sk; |
276 | |
277 | if (parent) |
278 | bt_accept_enqueue(parent, sk, bh: true); |
279 | |
280 | return 0; |
281 | } |
282 | |
283 | static int iso_chan_add(struct iso_conn *conn, struct sock *sk, |
284 | struct sock *parent) |
285 | { |
286 | int err; |
287 | |
288 | iso_conn_lock(conn); |
289 | err = __iso_chan_add(conn, sk, parent); |
290 | iso_conn_unlock(conn); |
291 | |
292 | return err; |
293 | } |
294 | |
295 | static inline u8 le_addr_type(u8 bdaddr_type) |
296 | { |
297 | if (bdaddr_type == BDADDR_LE_PUBLIC) |
298 | return ADDR_LE_DEV_PUBLIC; |
299 | else |
300 | return ADDR_LE_DEV_RANDOM; |
301 | } |
302 | |
303 | static int iso_connect_bis(struct sock *sk) |
304 | { |
305 | struct iso_conn *conn; |
306 | struct hci_conn *hcon; |
307 | struct hci_dev *hdev; |
308 | int err; |
309 | |
310 | BT_DBG("%pMR" , &iso_pi(sk)->src); |
311 | |
312 | hdev = hci_get_route(dst: &iso_pi(sk)->dst, src: &iso_pi(sk)->src, |
313 | iso_pi(sk)->src_type); |
314 | if (!hdev) |
315 | return -EHOSTUNREACH; |
316 | |
317 | hci_dev_lock(hdev); |
318 | |
319 | if (!bis_capable(hdev)) { |
320 | err = -EOPNOTSUPP; |
321 | goto unlock; |
322 | } |
323 | |
324 | /* Fail if user set invalid QoS */ |
325 | if (iso_pi(sk)->qos_user_set && !check_bcast_qos(qos: &iso_pi(sk)->qos)) { |
326 | iso_pi(sk)->qos = default_qos; |
327 | err = -EINVAL; |
328 | goto unlock; |
329 | } |
330 | |
331 | /* Fail if out PHYs are marked as disabled */ |
332 | if (!iso_pi(sk)->qos.bcast.out.phy) { |
333 | err = -EINVAL; |
334 | goto unlock; |
335 | } |
336 | |
337 | /* Just bind if DEFER_SETUP has been set */ |
338 | if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { |
339 | hcon = hci_bind_bis(hdev, dst: &iso_pi(sk)->dst, |
340 | qos: &iso_pi(sk)->qos, iso_pi(sk)->base_len, |
341 | iso_pi(sk)->base); |
342 | if (IS_ERR(ptr: hcon)) { |
343 | err = PTR_ERR(ptr: hcon); |
344 | goto unlock; |
345 | } |
346 | } else { |
347 | hcon = hci_connect_bis(hdev, dst: &iso_pi(sk)->dst, |
348 | dst_type: le_addr_type(iso_pi(sk)->dst_type), |
349 | qos: &iso_pi(sk)->qos, iso_pi(sk)->base_len, |
350 | iso_pi(sk)->base); |
351 | if (IS_ERR(ptr: hcon)) { |
352 | err = PTR_ERR(ptr: hcon); |
353 | goto unlock; |
354 | } |
355 | } |
356 | |
357 | conn = iso_conn_add(hcon); |
358 | if (!conn) { |
359 | hci_conn_drop(conn: hcon); |
360 | err = -ENOMEM; |
361 | goto unlock; |
362 | } |
363 | |
364 | lock_sock(sk); |
365 | |
366 | err = iso_chan_add(conn, sk, NULL); |
367 | if (err) { |
368 | release_sock(sk); |
369 | goto unlock; |
370 | } |
371 | |
372 | /* Update source addr of the socket */ |
373 | bacpy(dst: &iso_pi(sk)->src, src: &hcon->src); |
374 | |
375 | if (hcon->state == BT_CONNECTED) { |
376 | iso_sock_clear_timer(sk); |
377 | sk->sk_state = BT_CONNECTED; |
378 | } else if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { |
379 | iso_sock_clear_timer(sk); |
380 | sk->sk_state = BT_CONNECT; |
381 | } else { |
382 | sk->sk_state = BT_CONNECT; |
383 | iso_sock_set_timer(sk, timeout: sk->sk_sndtimeo); |
384 | } |
385 | |
386 | release_sock(sk); |
387 | |
388 | unlock: |
389 | hci_dev_unlock(hdev); |
390 | hci_dev_put(d: hdev); |
391 | return err; |
392 | } |
393 | |
394 | static int iso_connect_cis(struct sock *sk) |
395 | { |
396 | struct iso_conn *conn; |
397 | struct hci_conn *hcon; |
398 | struct hci_dev *hdev; |
399 | int err; |
400 | |
401 | BT_DBG("%pMR -> %pMR" , &iso_pi(sk)->src, &iso_pi(sk)->dst); |
402 | |
403 | hdev = hci_get_route(dst: &iso_pi(sk)->dst, src: &iso_pi(sk)->src, |
404 | iso_pi(sk)->src_type); |
405 | if (!hdev) |
406 | return -EHOSTUNREACH; |
407 | |
408 | hci_dev_lock(hdev); |
409 | |
410 | if (!cis_central_capable(hdev)) { |
411 | err = -EOPNOTSUPP; |
412 | goto unlock; |
413 | } |
414 | |
415 | /* Fail if user set invalid QoS */ |
416 | if (iso_pi(sk)->qos_user_set && !check_ucast_qos(qos: &iso_pi(sk)->qos)) { |
417 | iso_pi(sk)->qos = default_qos; |
418 | err = -EINVAL; |
419 | goto unlock; |
420 | } |
421 | |
422 | /* Fail if either PHYs are marked as disabled */ |
423 | if (!iso_pi(sk)->qos.ucast.in.phy && !iso_pi(sk)->qos.ucast.out.phy) { |
424 | err = -EINVAL; |
425 | goto unlock; |
426 | } |
427 | |
428 | /* Just bind if DEFER_SETUP has been set */ |
429 | if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { |
430 | hcon = hci_bind_cis(hdev, dst: &iso_pi(sk)->dst, |
431 | dst_type: le_addr_type(iso_pi(sk)->dst_type), |
432 | qos: &iso_pi(sk)->qos); |
433 | if (IS_ERR(ptr: hcon)) { |
434 | err = PTR_ERR(ptr: hcon); |
435 | goto unlock; |
436 | } |
437 | } else { |
438 | hcon = hci_connect_cis(hdev, dst: &iso_pi(sk)->dst, |
439 | dst_type: le_addr_type(iso_pi(sk)->dst_type), |
440 | qos: &iso_pi(sk)->qos); |
441 | if (IS_ERR(ptr: hcon)) { |
442 | err = PTR_ERR(ptr: hcon); |
443 | goto unlock; |
444 | } |
445 | } |
446 | |
447 | conn = iso_conn_add(hcon); |
448 | if (!conn) { |
449 | hci_conn_drop(conn: hcon); |
450 | err = -ENOMEM; |
451 | goto unlock; |
452 | } |
453 | |
454 | lock_sock(sk); |
455 | |
456 | err = iso_chan_add(conn, sk, NULL); |
457 | if (err) { |
458 | release_sock(sk); |
459 | goto unlock; |
460 | } |
461 | |
462 | /* Update source addr of the socket */ |
463 | bacpy(dst: &iso_pi(sk)->src, src: &hcon->src); |
464 | |
465 | if (hcon->state == BT_CONNECTED) { |
466 | iso_sock_clear_timer(sk); |
467 | sk->sk_state = BT_CONNECTED; |
468 | } else if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { |
469 | iso_sock_clear_timer(sk); |
470 | sk->sk_state = BT_CONNECT; |
471 | } else { |
472 | sk->sk_state = BT_CONNECT; |
473 | iso_sock_set_timer(sk, timeout: sk->sk_sndtimeo); |
474 | } |
475 | |
476 | release_sock(sk); |
477 | |
478 | unlock: |
479 | hci_dev_unlock(hdev); |
480 | hci_dev_put(d: hdev); |
481 | return err; |
482 | } |
483 | |
484 | static struct bt_iso_qos *iso_sock_get_qos(struct sock *sk) |
485 | { |
486 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONNECT2) |
487 | return &iso_pi(sk)->conn->hcon->iso_qos; |
488 | |
489 | return &iso_pi(sk)->qos; |
490 | } |
491 | |
492 | static int iso_send_frame(struct sock *sk, struct sk_buff *skb) |
493 | { |
494 | struct iso_conn *conn = iso_pi(sk)->conn; |
495 | struct bt_iso_qos *qos = iso_sock_get_qos(sk); |
496 | struct hci_iso_data_hdr *hdr; |
497 | int len = 0; |
498 | |
499 | BT_DBG("sk %p len %d" , sk, skb->len); |
500 | |
501 | if (skb->len > qos->ucast.out.sdu) |
502 | return -EMSGSIZE; |
503 | |
504 | len = skb->len; |
505 | |
506 | /* Push ISO data header */ |
507 | hdr = skb_push(skb, HCI_ISO_DATA_HDR_SIZE); |
508 | hdr->sn = cpu_to_le16(conn->tx_sn++); |
509 | hdr->slen = cpu_to_le16(hci_iso_data_len_pack(len, |
510 | HCI_ISO_STATUS_VALID)); |
511 | |
512 | if (sk->sk_state == BT_CONNECTED) |
513 | hci_send_iso(conn: conn->hcon, skb); |
514 | else |
515 | len = -ENOTCONN; |
516 | |
517 | return len; |
518 | } |
519 | |
520 | static void iso_recv_frame(struct iso_conn *conn, struct sk_buff *skb) |
521 | { |
522 | struct sock *sk; |
523 | |
524 | iso_conn_lock(conn); |
525 | sk = conn->sk; |
526 | iso_conn_unlock(conn); |
527 | |
528 | if (!sk) |
529 | goto drop; |
530 | |
531 | BT_DBG("sk %p len %d" , sk, skb->len); |
532 | |
533 | if (sk->sk_state != BT_CONNECTED) |
534 | goto drop; |
535 | |
536 | if (!sock_queue_rcv_skb(sk, skb)) |
537 | return; |
538 | |
539 | drop: |
540 | kfree_skb(skb); |
541 | } |
542 | |
543 | /* -------- Socket interface ---------- */ |
544 | static struct sock *__iso_get_sock_listen_by_addr(bdaddr_t *src, bdaddr_t *dst) |
545 | { |
546 | struct sock *sk; |
547 | |
548 | sk_for_each(sk, &iso_sk_list.head) { |
549 | if (sk->sk_state != BT_LISTEN) |
550 | continue; |
551 | |
552 | if (bacmp(ba1: &iso_pi(sk)->dst, ba2: dst)) |
553 | continue; |
554 | |
555 | if (!bacmp(ba1: &iso_pi(sk)->src, ba2: src)) |
556 | return sk; |
557 | } |
558 | |
559 | return NULL; |
560 | } |
561 | |
562 | static struct sock *__iso_get_sock_listen_by_sid(bdaddr_t *ba, bdaddr_t *bc, |
563 | __u8 sid) |
564 | { |
565 | struct sock *sk; |
566 | |
567 | sk_for_each(sk, &iso_sk_list.head) { |
568 | if (sk->sk_state != BT_LISTEN) |
569 | continue; |
570 | |
571 | if (bacmp(ba1: &iso_pi(sk)->src, ba2: ba)) |
572 | continue; |
573 | |
574 | if (bacmp(ba1: &iso_pi(sk)->dst, ba2: bc)) |
575 | continue; |
576 | |
577 | if (iso_pi(sk)->bc_sid == sid) |
578 | return sk; |
579 | } |
580 | |
581 | return NULL; |
582 | } |
583 | |
584 | /* Find socket listening: |
585 | * source bdaddr (Unicast) |
586 | * destination bdaddr (Broadcast only) |
587 | * match func - pass NULL to ignore |
588 | * match func data - pass -1 to ignore |
589 | * Returns closest match. |
590 | */ |
591 | static struct sock *iso_get_sock_listen(bdaddr_t *src, bdaddr_t *dst, |
592 | iso_sock_match_t match, void *data) |
593 | { |
594 | struct sock *sk = NULL, *sk1 = NULL; |
595 | |
596 | read_lock(&iso_sk_list.lock); |
597 | |
598 | sk_for_each(sk, &iso_sk_list.head) { |
599 | if (sk->sk_state != BT_LISTEN) |
600 | continue; |
601 | |
602 | /* Match Broadcast destination */ |
603 | if (bacmp(ba1: dst, BDADDR_ANY) && bacmp(ba1: &iso_pi(sk)->dst, ba2: dst)) |
604 | continue; |
605 | |
606 | /* Use Match function if provided */ |
607 | if (match && !match(sk, data)) |
608 | continue; |
609 | |
610 | /* Exact match. */ |
611 | if (!bacmp(ba1: &iso_pi(sk)->src, ba2: src)) { |
612 | sock_hold(sk); |
613 | break; |
614 | } |
615 | |
616 | /* Closest match */ |
617 | if (!bacmp(ba1: &iso_pi(sk)->src, BDADDR_ANY)) { |
618 | if (sk1) |
619 | sock_put(sk: sk1); |
620 | |
621 | sk1 = sk; |
622 | sock_hold(sk: sk1); |
623 | } |
624 | } |
625 | |
626 | if (sk && sk1) |
627 | sock_put(sk: sk1); |
628 | |
629 | read_unlock(&iso_sk_list.lock); |
630 | |
631 | return sk ? sk : sk1; |
632 | } |
633 | |
634 | static struct sock *iso_get_sock_big(struct sock *match_sk, bdaddr_t *src, |
635 | bdaddr_t *dst, uint8_t big) |
636 | { |
637 | struct sock *sk = NULL; |
638 | |
639 | read_lock(&iso_sk_list.lock); |
640 | |
641 | sk_for_each(sk, &iso_sk_list.head) { |
642 | if (match_sk == sk) |
643 | continue; |
644 | |
645 | /* Look for sockets that have already been |
646 | * connected to the BIG |
647 | */ |
648 | if (sk->sk_state != BT_CONNECTED && |
649 | sk->sk_state != BT_CONNECT) |
650 | continue; |
651 | |
652 | /* Match Broadcast destination */ |
653 | if (bacmp(ba1: &iso_pi(sk)->dst, ba2: dst)) |
654 | continue; |
655 | |
656 | /* Match BIG handle */ |
657 | if (iso_pi(sk)->qos.bcast.big != big) |
658 | continue; |
659 | |
660 | /* Match source address */ |
661 | if (bacmp(ba1: &iso_pi(sk)->src, ba2: src)) |
662 | continue; |
663 | |
664 | sock_hold(sk); |
665 | break; |
666 | } |
667 | |
668 | read_unlock(&iso_sk_list.lock); |
669 | |
670 | return sk; |
671 | } |
672 | |
673 | static void iso_sock_destruct(struct sock *sk) |
674 | { |
675 | BT_DBG("sk %p" , sk); |
676 | |
677 | skb_queue_purge(list: &sk->sk_receive_queue); |
678 | skb_queue_purge(list: &sk->sk_write_queue); |
679 | } |
680 | |
681 | static void iso_sock_cleanup_listen(struct sock *parent) |
682 | { |
683 | struct sock *sk; |
684 | |
685 | BT_DBG("parent %p" , parent); |
686 | |
687 | /* Close not yet accepted channels */ |
688 | while ((sk = bt_accept_dequeue(parent, NULL))) { |
689 | iso_sock_close(sk); |
690 | iso_sock_kill(sk); |
691 | } |
692 | |
693 | /* If listening socket has a hcon, properly disconnect it */ |
694 | if (iso_pi(parent)->conn && iso_pi(parent)->conn->hcon) { |
695 | iso_sock_disconn(sk: parent); |
696 | return; |
697 | } |
698 | |
699 | parent->sk_state = BT_CLOSED; |
700 | sock_set_flag(sk: parent, flag: SOCK_ZAPPED); |
701 | } |
702 | |
703 | /* Kill socket (only if zapped and orphan) |
704 | * Must be called on unlocked socket. |
705 | */ |
706 | static void iso_sock_kill(struct sock *sk) |
707 | { |
708 | if (!sock_flag(sk, flag: SOCK_ZAPPED) || sk->sk_socket || |
709 | sock_flag(sk, flag: SOCK_DEAD)) |
710 | return; |
711 | |
712 | BT_DBG("sk %p state %d" , sk, sk->sk_state); |
713 | |
714 | /* Kill poor orphan */ |
715 | bt_sock_unlink(l: &iso_sk_list, s: sk); |
716 | sock_set_flag(sk, flag: SOCK_DEAD); |
717 | sock_put(sk); |
718 | } |
719 | |
720 | static void iso_sock_disconn(struct sock *sk) |
721 | { |
722 | struct sock *bis_sk; |
723 | struct hci_conn *hcon = iso_pi(sk)->conn->hcon; |
724 | |
725 | if (test_bit(HCI_CONN_BIG_CREATED, &hcon->flags)) { |
726 | bis_sk = iso_get_sock_big(match_sk: sk, src: &iso_pi(sk)->src, |
727 | dst: &iso_pi(sk)->dst, |
728 | iso_pi(sk)->qos.bcast.big); |
729 | |
730 | /* If there are any other connected sockets for the |
731 | * same BIG, just delete the sk and leave the bis |
732 | * hcon active, in case later rebinding is needed. |
733 | */ |
734 | if (bis_sk) { |
735 | hcon->state = BT_OPEN; |
736 | iso_pi(sk)->conn->hcon = NULL; |
737 | iso_sock_clear_timer(sk); |
738 | iso_chan_del(sk, err: bt_to_errno(code: hcon->abort_reason)); |
739 | sock_put(sk: bis_sk); |
740 | return; |
741 | } |
742 | } |
743 | |
744 | sk->sk_state = BT_DISCONN; |
745 | iso_sock_set_timer(sk, ISO_DISCONN_TIMEOUT); |
746 | iso_conn_lock(iso_pi(sk)->conn); |
747 | hci_conn_drop(iso_pi(sk)->conn->hcon); |
748 | iso_pi(sk)->conn->hcon = NULL; |
749 | iso_conn_unlock(iso_pi(sk)->conn); |
750 | } |
751 | |
752 | static void __iso_sock_close(struct sock *sk) |
753 | { |
754 | BT_DBG("sk %p state %d socket %p" , sk, sk->sk_state, sk->sk_socket); |
755 | |
756 | switch (sk->sk_state) { |
757 | case BT_LISTEN: |
758 | iso_sock_cleanup_listen(parent: sk); |
759 | break; |
760 | |
761 | case BT_CONNECT: |
762 | case BT_CONNECTED: |
763 | case BT_CONFIG: |
764 | if (iso_pi(sk)->conn->hcon) |
765 | iso_sock_disconn(sk); |
766 | else |
767 | iso_chan_del(sk, ECONNRESET); |
768 | break; |
769 | |
770 | case BT_CONNECT2: |
771 | if (iso_pi(sk)->conn->hcon && |
772 | (test_bit(HCI_CONN_PA_SYNC, &iso_pi(sk)->conn->hcon->flags) || |
773 | test_bit(HCI_CONN_PA_SYNC_FAILED, &iso_pi(sk)->conn->hcon->flags))) |
774 | iso_sock_disconn(sk); |
775 | else |
776 | iso_chan_del(sk, ECONNRESET); |
777 | break; |
778 | case BT_DISCONN: |
779 | iso_chan_del(sk, ECONNRESET); |
780 | break; |
781 | |
782 | default: |
783 | sock_set_flag(sk, flag: SOCK_ZAPPED); |
784 | break; |
785 | } |
786 | } |
787 | |
788 | /* Must be called on unlocked socket. */ |
789 | static void iso_sock_close(struct sock *sk) |
790 | { |
791 | iso_sock_clear_timer(sk); |
792 | lock_sock(sk); |
793 | __iso_sock_close(sk); |
794 | release_sock(sk); |
795 | iso_sock_kill(sk); |
796 | } |
797 | |
798 | static void iso_sock_init(struct sock *sk, struct sock *parent) |
799 | { |
800 | BT_DBG("sk %p" , sk); |
801 | |
802 | if (parent) { |
803 | sk->sk_type = parent->sk_type; |
804 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
805 | security_sk_clone(sk: parent, newsk: sk); |
806 | } |
807 | } |
808 | |
809 | static struct proto iso_proto = { |
810 | .name = "ISO" , |
811 | .owner = THIS_MODULE, |
812 | .obj_size = sizeof(struct iso_pinfo) |
813 | }; |
814 | |
815 | #define DEFAULT_IO_QOS \ |
816 | { \ |
817 | .interval = 10000u, \ |
818 | .latency = 10u, \ |
819 | .sdu = 40u, \ |
820 | .phy = BT_ISO_PHY_2M, \ |
821 | .rtn = 2u, \ |
822 | } |
823 | |
824 | static struct bt_iso_qos default_qos = { |
825 | .bcast = { |
826 | .big = BT_ISO_QOS_BIG_UNSET, |
827 | .bis = BT_ISO_QOS_BIS_UNSET, |
828 | .sync_factor = 0x01, |
829 | .packing = 0x00, |
830 | .framing = 0x00, |
831 | .in = DEFAULT_IO_QOS, |
832 | .out = DEFAULT_IO_QOS, |
833 | .encryption = 0x00, |
834 | .bcode = {0x00}, |
835 | .options = 0x00, |
836 | .skip = 0x0000, |
837 | .sync_timeout = BT_ISO_SYNC_TIMEOUT, |
838 | .sync_cte_type = 0x00, |
839 | .mse = 0x00, |
840 | .timeout = BT_ISO_SYNC_TIMEOUT, |
841 | }, |
842 | }; |
843 | |
844 | static struct sock *iso_sock_alloc(struct net *net, struct socket *sock, |
845 | int proto, gfp_t prio, int kern) |
846 | { |
847 | struct sock *sk; |
848 | |
849 | sk = bt_sock_alloc(net, sock, prot: &iso_proto, proto, prio, kern); |
850 | if (!sk) |
851 | return NULL; |
852 | |
853 | sk->sk_destruct = iso_sock_destruct; |
854 | sk->sk_sndtimeo = ISO_CONN_TIMEOUT; |
855 | |
856 | /* Set address type as public as default src address is BDADDR_ANY */ |
857 | iso_pi(sk)->src_type = BDADDR_LE_PUBLIC; |
858 | |
859 | iso_pi(sk)->qos = default_qos; |
860 | |
861 | bt_sock_link(l: &iso_sk_list, s: sk); |
862 | return sk; |
863 | } |
864 | |
865 | static int iso_sock_create(struct net *net, struct socket *sock, int protocol, |
866 | int kern) |
867 | { |
868 | struct sock *sk; |
869 | |
870 | BT_DBG("sock %p" , sock); |
871 | |
872 | sock->state = SS_UNCONNECTED; |
873 | |
874 | if (sock->type != SOCK_SEQPACKET) |
875 | return -ESOCKTNOSUPPORT; |
876 | |
877 | sock->ops = &iso_sock_ops; |
878 | |
879 | sk = iso_sock_alloc(net, sock, proto: protocol, GFP_ATOMIC, kern); |
880 | if (!sk) |
881 | return -ENOMEM; |
882 | |
883 | iso_sock_init(sk, NULL); |
884 | return 0; |
885 | } |
886 | |
887 | static int iso_sock_bind_bc(struct socket *sock, struct sockaddr *addr, |
888 | int addr_len) |
889 | { |
890 | struct sockaddr_iso *sa = (struct sockaddr_iso *)addr; |
891 | struct sock *sk = sock->sk; |
892 | int i; |
893 | |
894 | BT_DBG("sk %p bc_sid %u bc_num_bis %u" , sk, sa->iso_bc->bc_sid, |
895 | sa->iso_bc->bc_num_bis); |
896 | |
897 | if (addr_len != sizeof(*sa) + sizeof(*sa->iso_bc)) |
898 | return -EINVAL; |
899 | |
900 | bacpy(dst: &iso_pi(sk)->dst, src: &sa->iso_bc->bc_bdaddr); |
901 | |
902 | /* Check if the address type is of LE type */ |
903 | if (!bdaddr_type_is_le(type: sa->iso_bc->bc_bdaddr_type)) |
904 | return -EINVAL; |
905 | |
906 | iso_pi(sk)->dst_type = sa->iso_bc->bc_bdaddr_type; |
907 | iso_pi(sk)->sync_handle = -1; |
908 | |
909 | if (sa->iso_bc->bc_sid > 0x0f) |
910 | return -EINVAL; |
911 | |
912 | iso_pi(sk)->bc_sid = sa->iso_bc->bc_sid; |
913 | |
914 | if (sa->iso_bc->bc_num_bis > ISO_MAX_NUM_BIS) |
915 | return -EINVAL; |
916 | |
917 | iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis; |
918 | |
919 | for (i = 0; i < iso_pi(sk)->bc_num_bis; i++) |
920 | if (sa->iso_bc->bc_bis[i] < 0x01 || |
921 | sa->iso_bc->bc_bis[i] > 0x1f) |
922 | return -EINVAL; |
923 | |
924 | memcpy(iso_pi(sk)->bc_bis, sa->iso_bc->bc_bis, |
925 | iso_pi(sk)->bc_num_bis); |
926 | |
927 | return 0; |
928 | } |
929 | |
930 | static int iso_sock_bind_pa_sk(struct sock *sk, struct sockaddr_iso *sa, |
931 | int addr_len) |
932 | { |
933 | int err = 0; |
934 | |
935 | if (sk->sk_type != SOCK_SEQPACKET) { |
936 | err = -EINVAL; |
937 | goto done; |
938 | } |
939 | |
940 | if (addr_len != sizeof(*sa) + sizeof(*sa->iso_bc)) { |
941 | err = -EINVAL; |
942 | goto done; |
943 | } |
944 | |
945 | if (sa->iso_bc->bc_num_bis > ISO_MAX_NUM_BIS) { |
946 | err = -EINVAL; |
947 | goto done; |
948 | } |
949 | |
950 | iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis; |
951 | |
952 | for (int i = 0; i < iso_pi(sk)->bc_num_bis; i++) |
953 | if (sa->iso_bc->bc_bis[i] < 0x01 || |
954 | sa->iso_bc->bc_bis[i] > 0x1f) { |
955 | err = -EINVAL; |
956 | goto done; |
957 | } |
958 | |
959 | memcpy(iso_pi(sk)->bc_bis, sa->iso_bc->bc_bis, |
960 | iso_pi(sk)->bc_num_bis); |
961 | |
962 | done: |
963 | return err; |
964 | } |
965 | |
966 | static int iso_sock_bind(struct socket *sock, struct sockaddr *addr, |
967 | int addr_len) |
968 | { |
969 | struct sockaddr_iso *sa = (struct sockaddr_iso *)addr; |
970 | struct sock *sk = sock->sk; |
971 | int err = 0; |
972 | |
973 | BT_DBG("sk %p %pMR type %u" , sk, &sa->iso_bdaddr, sa->iso_bdaddr_type); |
974 | |
975 | if (!addr || addr_len < sizeof(struct sockaddr_iso) || |
976 | addr->sa_family != AF_BLUETOOTH) |
977 | return -EINVAL; |
978 | |
979 | lock_sock(sk); |
980 | |
981 | /* Allow the user to bind a PA sync socket to a number |
982 | * of BISes to sync to. |
983 | */ |
984 | if (sk->sk_state == BT_CONNECT2 && |
985 | test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags)) { |
986 | err = iso_sock_bind_pa_sk(sk, sa, addr_len); |
987 | goto done; |
988 | } |
989 | |
990 | if (sk->sk_state != BT_OPEN) { |
991 | err = -EBADFD; |
992 | goto done; |
993 | } |
994 | |
995 | if (sk->sk_type != SOCK_SEQPACKET) { |
996 | err = -EINVAL; |
997 | goto done; |
998 | } |
999 | |
1000 | /* Check if the address type is of LE type */ |
1001 | if (!bdaddr_type_is_le(type: sa->iso_bdaddr_type)) { |
1002 | err = -EINVAL; |
1003 | goto done; |
1004 | } |
1005 | |
1006 | bacpy(dst: &iso_pi(sk)->src, src: &sa->iso_bdaddr); |
1007 | iso_pi(sk)->src_type = sa->iso_bdaddr_type; |
1008 | |
1009 | /* Check for Broadcast address */ |
1010 | if (addr_len > sizeof(*sa)) { |
1011 | err = iso_sock_bind_bc(sock, addr, addr_len); |
1012 | if (err) |
1013 | goto done; |
1014 | } |
1015 | |
1016 | sk->sk_state = BT_BOUND; |
1017 | |
1018 | done: |
1019 | release_sock(sk); |
1020 | return err; |
1021 | } |
1022 | |
1023 | static int iso_sock_connect(struct socket *sock, struct sockaddr *addr, |
1024 | int alen, int flags) |
1025 | { |
1026 | struct sockaddr_iso *sa = (struct sockaddr_iso *)addr; |
1027 | struct sock *sk = sock->sk; |
1028 | int err; |
1029 | |
1030 | BT_DBG("sk %p" , sk); |
1031 | |
1032 | if (alen < sizeof(struct sockaddr_iso) || |
1033 | addr->sa_family != AF_BLUETOOTH) |
1034 | return -EINVAL; |
1035 | |
1036 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) |
1037 | return -EBADFD; |
1038 | |
1039 | if (sk->sk_type != SOCK_SEQPACKET) |
1040 | return -EINVAL; |
1041 | |
1042 | /* Check if the address type is of LE type */ |
1043 | if (!bdaddr_type_is_le(type: sa->iso_bdaddr_type)) |
1044 | return -EINVAL; |
1045 | |
1046 | lock_sock(sk); |
1047 | |
1048 | bacpy(dst: &iso_pi(sk)->dst, src: &sa->iso_bdaddr); |
1049 | iso_pi(sk)->dst_type = sa->iso_bdaddr_type; |
1050 | |
1051 | release_sock(sk); |
1052 | |
1053 | if (bacmp(ba1: &iso_pi(sk)->dst, BDADDR_ANY)) |
1054 | err = iso_connect_cis(sk); |
1055 | else |
1056 | err = iso_connect_bis(sk); |
1057 | |
1058 | if (err) |
1059 | return err; |
1060 | |
1061 | lock_sock(sk); |
1062 | |
1063 | if (!test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { |
1064 | err = bt_sock_wait_state(sk, state: BT_CONNECTED, |
1065 | timeo: sock_sndtimeo(sk, noblock: flags & O_NONBLOCK)); |
1066 | } |
1067 | |
1068 | release_sock(sk); |
1069 | return err; |
1070 | } |
1071 | |
1072 | static int iso_listen_bis(struct sock *sk) |
1073 | { |
1074 | struct hci_dev *hdev; |
1075 | int err = 0; |
1076 | struct iso_conn *conn; |
1077 | struct hci_conn *hcon; |
1078 | |
1079 | BT_DBG("%pMR -> %pMR (SID 0x%2.2x)" , &iso_pi(sk)->src, |
1080 | &iso_pi(sk)->dst, iso_pi(sk)->bc_sid); |
1081 | |
1082 | write_lock(&iso_sk_list.lock); |
1083 | |
1084 | if (__iso_get_sock_listen_by_sid(ba: &iso_pi(sk)->src, bc: &iso_pi(sk)->dst, |
1085 | iso_pi(sk)->bc_sid)) |
1086 | err = -EADDRINUSE; |
1087 | |
1088 | write_unlock(&iso_sk_list.lock); |
1089 | |
1090 | if (err) |
1091 | return err; |
1092 | |
1093 | hdev = hci_get_route(dst: &iso_pi(sk)->dst, src: &iso_pi(sk)->src, |
1094 | iso_pi(sk)->src_type); |
1095 | if (!hdev) |
1096 | return -EHOSTUNREACH; |
1097 | |
1098 | hci_dev_lock(hdev); |
1099 | |
1100 | /* Fail if user set invalid QoS */ |
1101 | if (iso_pi(sk)->qos_user_set && !check_bcast_qos(qos: &iso_pi(sk)->qos)) { |
1102 | iso_pi(sk)->qos = default_qos; |
1103 | err = -EINVAL; |
1104 | goto unlock; |
1105 | } |
1106 | |
1107 | hcon = hci_pa_create_sync(hdev, dst: &iso_pi(sk)->dst, |
1108 | dst_type: le_addr_type(iso_pi(sk)->dst_type), |
1109 | iso_pi(sk)->bc_sid, qos: &iso_pi(sk)->qos); |
1110 | if (IS_ERR(ptr: hcon)) { |
1111 | err = PTR_ERR(ptr: hcon); |
1112 | goto unlock; |
1113 | } |
1114 | |
1115 | conn = iso_conn_add(hcon); |
1116 | if (!conn) { |
1117 | hci_conn_drop(conn: hcon); |
1118 | err = -ENOMEM; |
1119 | goto unlock; |
1120 | } |
1121 | |
1122 | err = iso_chan_add(conn, sk, NULL); |
1123 | if (err) { |
1124 | hci_conn_drop(conn: hcon); |
1125 | goto unlock; |
1126 | } |
1127 | |
1128 | hci_dev_put(d: hdev); |
1129 | |
1130 | unlock: |
1131 | hci_dev_unlock(hdev); |
1132 | return err; |
1133 | } |
1134 | |
1135 | static int iso_listen_cis(struct sock *sk) |
1136 | { |
1137 | int err = 0; |
1138 | |
1139 | BT_DBG("%pMR" , &iso_pi(sk)->src); |
1140 | |
1141 | write_lock(&iso_sk_list.lock); |
1142 | |
1143 | if (__iso_get_sock_listen_by_addr(src: &iso_pi(sk)->src, dst: &iso_pi(sk)->dst)) |
1144 | err = -EADDRINUSE; |
1145 | |
1146 | write_unlock(&iso_sk_list.lock); |
1147 | |
1148 | return err; |
1149 | } |
1150 | |
1151 | static int iso_sock_listen(struct socket *sock, int backlog) |
1152 | { |
1153 | struct sock *sk = sock->sk; |
1154 | int err = 0; |
1155 | |
1156 | BT_DBG("sk %p backlog %d" , sk, backlog); |
1157 | |
1158 | lock_sock(sk); |
1159 | |
1160 | if (sk->sk_state != BT_BOUND) { |
1161 | err = -EBADFD; |
1162 | goto done; |
1163 | } |
1164 | |
1165 | if (sk->sk_type != SOCK_SEQPACKET) { |
1166 | err = -EINVAL; |
1167 | goto done; |
1168 | } |
1169 | |
1170 | if (!bacmp(ba1: &iso_pi(sk)->dst, BDADDR_ANY)) |
1171 | err = iso_listen_cis(sk); |
1172 | else |
1173 | err = iso_listen_bis(sk); |
1174 | |
1175 | if (err) |
1176 | goto done; |
1177 | |
1178 | sk->sk_max_ack_backlog = backlog; |
1179 | sk->sk_ack_backlog = 0; |
1180 | |
1181 | sk->sk_state = BT_LISTEN; |
1182 | |
1183 | done: |
1184 | release_sock(sk); |
1185 | return err; |
1186 | } |
1187 | |
1188 | static int iso_sock_accept(struct socket *sock, struct socket *newsock, |
1189 | int flags, bool kern) |
1190 | { |
1191 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
1192 | struct sock *sk = sock->sk, *ch; |
1193 | long timeo; |
1194 | int err = 0; |
1195 | |
1196 | lock_sock(sk); |
1197 | |
1198 | timeo = sock_rcvtimeo(sk, noblock: flags & O_NONBLOCK); |
1199 | |
1200 | BT_DBG("sk %p timeo %ld" , sk, timeo); |
1201 | |
1202 | /* Wait for an incoming connection. (wake-one). */ |
1203 | add_wait_queue_exclusive(wq_head: sk_sleep(sk), wq_entry: &wait); |
1204 | while (1) { |
1205 | if (sk->sk_state != BT_LISTEN) { |
1206 | err = -EBADFD; |
1207 | break; |
1208 | } |
1209 | |
1210 | ch = bt_accept_dequeue(parent: sk, newsock); |
1211 | if (ch) |
1212 | break; |
1213 | |
1214 | if (!timeo) { |
1215 | err = -EAGAIN; |
1216 | break; |
1217 | } |
1218 | |
1219 | if (signal_pending(current)) { |
1220 | err = sock_intr_errno(timeo); |
1221 | break; |
1222 | } |
1223 | |
1224 | release_sock(sk); |
1225 | |
1226 | timeo = wait_woken(wq_entry: &wait, TASK_INTERRUPTIBLE, timeout: timeo); |
1227 | lock_sock(sk); |
1228 | } |
1229 | remove_wait_queue(wq_head: sk_sleep(sk), wq_entry: &wait); |
1230 | |
1231 | if (err) |
1232 | goto done; |
1233 | |
1234 | newsock->state = SS_CONNECTED; |
1235 | |
1236 | BT_DBG("new socket %p" , ch); |
1237 | |
1238 | done: |
1239 | release_sock(sk); |
1240 | return err; |
1241 | } |
1242 | |
1243 | static int iso_sock_getname(struct socket *sock, struct sockaddr *addr, |
1244 | int peer) |
1245 | { |
1246 | struct sockaddr_iso *sa = (struct sockaddr_iso *)addr; |
1247 | struct sock *sk = sock->sk; |
1248 | |
1249 | BT_DBG("sock %p, sk %p" , sock, sk); |
1250 | |
1251 | addr->sa_family = AF_BLUETOOTH; |
1252 | |
1253 | if (peer) { |
1254 | bacpy(dst: &sa->iso_bdaddr, src: &iso_pi(sk)->dst); |
1255 | sa->iso_bdaddr_type = iso_pi(sk)->dst_type; |
1256 | } else { |
1257 | bacpy(dst: &sa->iso_bdaddr, src: &iso_pi(sk)->src); |
1258 | sa->iso_bdaddr_type = iso_pi(sk)->src_type; |
1259 | } |
1260 | |
1261 | return sizeof(struct sockaddr_iso); |
1262 | } |
1263 | |
1264 | static int iso_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
1265 | size_t len) |
1266 | { |
1267 | struct sock *sk = sock->sk; |
1268 | struct sk_buff *skb, **frag; |
1269 | size_t mtu; |
1270 | int err; |
1271 | |
1272 | BT_DBG("sock %p, sk %p" , sock, sk); |
1273 | |
1274 | err = sock_error(sk); |
1275 | if (err) |
1276 | return err; |
1277 | |
1278 | if (msg->msg_flags & MSG_OOB) |
1279 | return -EOPNOTSUPP; |
1280 | |
1281 | lock_sock(sk); |
1282 | |
1283 | if (sk->sk_state != BT_CONNECTED) { |
1284 | release_sock(sk); |
1285 | return -ENOTCONN; |
1286 | } |
1287 | |
1288 | mtu = iso_pi(sk)->conn->hcon->hdev->iso_mtu; |
1289 | |
1290 | release_sock(sk); |
1291 | |
1292 | skb = bt_skb_sendmsg(sk, msg, len, mtu, HCI_ISO_DATA_HDR_SIZE, tailroom: 0); |
1293 | if (IS_ERR(ptr: skb)) |
1294 | return PTR_ERR(ptr: skb); |
1295 | |
1296 | len -= skb->len; |
1297 | |
1298 | BT_DBG("skb %p len %d" , sk, skb->len); |
1299 | |
1300 | /* Continuation fragments */ |
1301 | frag = &skb_shinfo(skb)->frag_list; |
1302 | while (len) { |
1303 | struct sk_buff *tmp; |
1304 | |
1305 | tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom: 0, tailroom: 0); |
1306 | if (IS_ERR(ptr: tmp)) { |
1307 | kfree_skb(skb); |
1308 | return PTR_ERR(ptr: tmp); |
1309 | } |
1310 | |
1311 | *frag = tmp; |
1312 | |
1313 | len -= tmp->len; |
1314 | |
1315 | skb->len += tmp->len; |
1316 | skb->data_len += tmp->len; |
1317 | |
1318 | BT_DBG("frag %p len %d" , *frag, tmp->len); |
1319 | |
1320 | frag = &(*frag)->next; |
1321 | } |
1322 | |
1323 | lock_sock(sk); |
1324 | |
1325 | if (sk->sk_state == BT_CONNECTED) |
1326 | err = iso_send_frame(sk, skb); |
1327 | else |
1328 | err = -ENOTCONN; |
1329 | |
1330 | release_sock(sk); |
1331 | |
1332 | if (err < 0) |
1333 | kfree_skb(skb); |
1334 | return err; |
1335 | } |
1336 | |
1337 | static void iso_conn_defer_accept(struct hci_conn *conn) |
1338 | { |
1339 | struct hci_cp_le_accept_cis cp; |
1340 | struct hci_dev *hdev = conn->hdev; |
1341 | |
1342 | BT_DBG("conn %p" , conn); |
1343 | |
1344 | conn->state = BT_CONFIG; |
1345 | |
1346 | cp.handle = cpu_to_le16(conn->handle); |
1347 | |
1348 | hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, plen: sizeof(cp), param: &cp); |
1349 | } |
1350 | |
1351 | static void iso_conn_big_sync(struct sock *sk) |
1352 | { |
1353 | int err; |
1354 | struct hci_dev *hdev; |
1355 | |
1356 | hdev = hci_get_route(dst: &iso_pi(sk)->dst, src: &iso_pi(sk)->src, |
1357 | iso_pi(sk)->src_type); |
1358 | |
1359 | if (!hdev) |
1360 | return; |
1361 | |
1362 | if (!test_and_set_bit(nr: BT_SK_BIG_SYNC, addr: &iso_pi(sk)->flags)) { |
1363 | err = hci_le_big_create_sync(hdev, iso_pi(sk)->conn->hcon, |
1364 | qos: &iso_pi(sk)->qos, |
1365 | iso_pi(sk)->sync_handle, |
1366 | iso_pi(sk)->bc_num_bis, |
1367 | iso_pi(sk)->bc_bis); |
1368 | if (err) |
1369 | bt_dev_err(hdev, "hci_le_big_create_sync: %d" , |
1370 | err); |
1371 | } |
1372 | } |
1373 | |
1374 | static int iso_sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1375 | size_t len, int flags) |
1376 | { |
1377 | struct sock *sk = sock->sk; |
1378 | struct iso_pinfo *pi = iso_pi(sk); |
1379 | |
1380 | BT_DBG("sk %p" , sk); |
1381 | |
1382 | if (test_and_clear_bit(nr: BT_SK_DEFER_SETUP, addr: &bt_sk(sk)->flags)) { |
1383 | lock_sock(sk); |
1384 | switch (sk->sk_state) { |
1385 | case BT_CONNECT2: |
1386 | if (pi->conn->hcon && |
1387 | test_bit(HCI_CONN_PA_SYNC, &pi->conn->hcon->flags)) { |
1388 | iso_conn_big_sync(sk); |
1389 | sk->sk_state = BT_LISTEN; |
1390 | } else { |
1391 | iso_conn_defer_accept(conn: pi->conn->hcon); |
1392 | sk->sk_state = BT_CONFIG; |
1393 | } |
1394 | release_sock(sk); |
1395 | return 0; |
1396 | case BT_CONNECT: |
1397 | release_sock(sk); |
1398 | return iso_connect_cis(sk); |
1399 | default: |
1400 | release_sock(sk); |
1401 | break; |
1402 | } |
1403 | } |
1404 | |
1405 | return bt_sock_recvmsg(sock, msg, len, flags); |
1406 | } |
1407 | |
1408 | static bool check_io_qos(struct bt_iso_io_qos *qos) |
1409 | { |
1410 | /* If no PHY is enable SDU must be 0 */ |
1411 | if (!qos->phy && qos->sdu) |
1412 | return false; |
1413 | |
1414 | if (qos->interval && (qos->interval < 0xff || qos->interval > 0xfffff)) |
1415 | return false; |
1416 | |
1417 | if (qos->latency && (qos->latency < 0x05 || qos->latency > 0xfa0)) |
1418 | return false; |
1419 | |
1420 | if (qos->phy > BT_ISO_PHY_ANY) |
1421 | return false; |
1422 | |
1423 | return true; |
1424 | } |
1425 | |
1426 | static bool check_ucast_qos(struct bt_iso_qos *qos) |
1427 | { |
1428 | if (qos->ucast.cig > 0xef && qos->ucast.cig != BT_ISO_QOS_CIG_UNSET) |
1429 | return false; |
1430 | |
1431 | if (qos->ucast.cis > 0xef && qos->ucast.cis != BT_ISO_QOS_CIS_UNSET) |
1432 | return false; |
1433 | |
1434 | if (qos->ucast.sca > 0x07) |
1435 | return false; |
1436 | |
1437 | if (qos->ucast.packing > 0x01) |
1438 | return false; |
1439 | |
1440 | if (qos->ucast.framing > 0x01) |
1441 | return false; |
1442 | |
1443 | if (!check_io_qos(qos: &qos->ucast.in)) |
1444 | return false; |
1445 | |
1446 | if (!check_io_qos(qos: &qos->ucast.out)) |
1447 | return false; |
1448 | |
1449 | return true; |
1450 | } |
1451 | |
1452 | static bool check_bcast_qos(struct bt_iso_qos *qos) |
1453 | { |
1454 | if (!qos->bcast.sync_factor) |
1455 | qos->bcast.sync_factor = 0x01; |
1456 | |
1457 | if (qos->bcast.packing > 0x01) |
1458 | return false; |
1459 | |
1460 | if (qos->bcast.framing > 0x01) |
1461 | return false; |
1462 | |
1463 | if (!check_io_qos(qos: &qos->bcast.in)) |
1464 | return false; |
1465 | |
1466 | if (!check_io_qos(qos: &qos->bcast.out)) |
1467 | return false; |
1468 | |
1469 | if (qos->bcast.encryption > 0x01) |
1470 | return false; |
1471 | |
1472 | if (qos->bcast.options > 0x07) |
1473 | return false; |
1474 | |
1475 | if (qos->bcast.skip > 0x01f3) |
1476 | return false; |
1477 | |
1478 | if (!qos->bcast.sync_timeout) |
1479 | qos->bcast.sync_timeout = BT_ISO_SYNC_TIMEOUT; |
1480 | |
1481 | if (qos->bcast.sync_timeout < 0x000a || qos->bcast.sync_timeout > 0x4000) |
1482 | return false; |
1483 | |
1484 | if (qos->bcast.sync_cte_type > 0x1f) |
1485 | return false; |
1486 | |
1487 | if (qos->bcast.mse > 0x1f) |
1488 | return false; |
1489 | |
1490 | if (!qos->bcast.timeout) |
1491 | qos->bcast.sync_timeout = BT_ISO_SYNC_TIMEOUT; |
1492 | |
1493 | if (qos->bcast.timeout < 0x000a || qos->bcast.timeout > 0x4000) |
1494 | return false; |
1495 | |
1496 | return true; |
1497 | } |
1498 | |
1499 | static int iso_sock_setsockopt(struct socket *sock, int level, int optname, |
1500 | sockptr_t optval, unsigned int optlen) |
1501 | { |
1502 | struct sock *sk = sock->sk; |
1503 | int err = 0; |
1504 | struct bt_iso_qos qos = default_qos; |
1505 | u32 opt; |
1506 | |
1507 | BT_DBG("sk %p" , sk); |
1508 | |
1509 | lock_sock(sk); |
1510 | |
1511 | switch (optname) { |
1512 | case BT_DEFER_SETUP: |
1513 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { |
1514 | err = -EINVAL; |
1515 | break; |
1516 | } |
1517 | |
1518 | err = bt_copy_from_sockptr(dst: &opt, dst_size: sizeof(opt), src: optval, src_size: optlen); |
1519 | if (err) |
1520 | break; |
1521 | |
1522 | if (opt) |
1523 | set_bit(nr: BT_SK_DEFER_SETUP, addr: &bt_sk(sk)->flags); |
1524 | else |
1525 | clear_bit(nr: BT_SK_DEFER_SETUP, addr: &bt_sk(sk)->flags); |
1526 | break; |
1527 | |
1528 | case BT_PKT_STATUS: |
1529 | err = bt_copy_from_sockptr(dst: &opt, dst_size: sizeof(opt), src: optval, src_size: optlen); |
1530 | if (err) |
1531 | break; |
1532 | |
1533 | if (opt) |
1534 | set_bit(nr: BT_SK_PKT_STATUS, addr: &bt_sk(sk)->flags); |
1535 | else |
1536 | clear_bit(nr: BT_SK_PKT_STATUS, addr: &bt_sk(sk)->flags); |
1537 | break; |
1538 | |
1539 | case BT_ISO_QOS: |
1540 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND && |
1541 | sk->sk_state != BT_CONNECT2) { |
1542 | err = -EINVAL; |
1543 | break; |
1544 | } |
1545 | |
1546 | err = bt_copy_from_sockptr(dst: &qos, dst_size: sizeof(qos), src: optval, src_size: optlen); |
1547 | if (err) |
1548 | break; |
1549 | |
1550 | iso_pi(sk)->qos = qos; |
1551 | iso_pi(sk)->qos_user_set = true; |
1552 | |
1553 | break; |
1554 | |
1555 | case BT_ISO_BASE: |
1556 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND && |
1557 | sk->sk_state != BT_CONNECT2) { |
1558 | err = -EINVAL; |
1559 | break; |
1560 | } |
1561 | |
1562 | if (optlen > sizeof(iso_pi(sk)->base)) { |
1563 | err = -EINVAL; |
1564 | break; |
1565 | } |
1566 | |
1567 | err = bt_copy_from_sockptr(iso_pi(sk)->base, dst_size: optlen, src: optval, |
1568 | src_size: optlen); |
1569 | if (err) |
1570 | break; |
1571 | |
1572 | iso_pi(sk)->base_len = optlen; |
1573 | |
1574 | break; |
1575 | |
1576 | default: |
1577 | err = -ENOPROTOOPT; |
1578 | break; |
1579 | } |
1580 | |
1581 | release_sock(sk); |
1582 | return err; |
1583 | } |
1584 | |
1585 | static int iso_sock_getsockopt(struct socket *sock, int level, int optname, |
1586 | char __user *optval, int __user *optlen) |
1587 | { |
1588 | struct sock *sk = sock->sk; |
1589 | int len, err = 0; |
1590 | struct bt_iso_qos *qos; |
1591 | u8 base_len; |
1592 | u8 *base; |
1593 | |
1594 | BT_DBG("sk %p" , sk); |
1595 | |
1596 | if (get_user(len, optlen)) |
1597 | return -EFAULT; |
1598 | |
1599 | lock_sock(sk); |
1600 | |
1601 | switch (optname) { |
1602 | case BT_DEFER_SETUP: |
1603 | if (sk->sk_state == BT_CONNECTED) { |
1604 | err = -EINVAL; |
1605 | break; |
1606 | } |
1607 | |
1608 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), |
1609 | (u32 __user *)optval)) |
1610 | err = -EFAULT; |
1611 | |
1612 | break; |
1613 | |
1614 | case BT_PKT_STATUS: |
1615 | if (put_user(test_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags), |
1616 | (int __user *)optval)) |
1617 | err = -EFAULT; |
1618 | break; |
1619 | |
1620 | case BT_ISO_QOS: |
1621 | qos = iso_sock_get_qos(sk); |
1622 | |
1623 | len = min_t(unsigned int, len, sizeof(*qos)); |
1624 | if (copy_to_user(to: optval, from: qos, n: len)) |
1625 | err = -EFAULT; |
1626 | |
1627 | break; |
1628 | |
1629 | case BT_ISO_BASE: |
1630 | if (sk->sk_state == BT_CONNECTED && |
1631 | !bacmp(ba1: &iso_pi(sk)->dst, BDADDR_ANY)) { |
1632 | base_len = iso_pi(sk)->conn->hcon->le_per_adv_data_len; |
1633 | base = iso_pi(sk)->conn->hcon->le_per_adv_data; |
1634 | } else { |
1635 | base_len = iso_pi(sk)->base_len; |
1636 | base = iso_pi(sk)->base; |
1637 | } |
1638 | |
1639 | len = min_t(unsigned int, len, base_len); |
1640 | if (copy_to_user(to: optval, from: base, n: len)) |
1641 | err = -EFAULT; |
1642 | if (put_user(len, optlen)) |
1643 | err = -EFAULT; |
1644 | |
1645 | break; |
1646 | |
1647 | default: |
1648 | err = -ENOPROTOOPT; |
1649 | break; |
1650 | } |
1651 | |
1652 | release_sock(sk); |
1653 | return err; |
1654 | } |
1655 | |
1656 | static int iso_sock_shutdown(struct socket *sock, int how) |
1657 | { |
1658 | struct sock *sk = sock->sk; |
1659 | int err = 0; |
1660 | |
1661 | BT_DBG("sock %p, sk %p, how %d" , sock, sk, how); |
1662 | |
1663 | if (!sk) |
1664 | return 0; |
1665 | |
1666 | sock_hold(sk); |
1667 | lock_sock(sk); |
1668 | |
1669 | switch (how) { |
1670 | case SHUT_RD: |
1671 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
1672 | goto unlock; |
1673 | sk->sk_shutdown |= RCV_SHUTDOWN; |
1674 | break; |
1675 | case SHUT_WR: |
1676 | if (sk->sk_shutdown & SEND_SHUTDOWN) |
1677 | goto unlock; |
1678 | sk->sk_shutdown |= SEND_SHUTDOWN; |
1679 | break; |
1680 | case SHUT_RDWR: |
1681 | if (sk->sk_shutdown & SHUTDOWN_MASK) |
1682 | goto unlock; |
1683 | sk->sk_shutdown |= SHUTDOWN_MASK; |
1684 | break; |
1685 | } |
1686 | |
1687 | iso_sock_clear_timer(sk); |
1688 | __iso_sock_close(sk); |
1689 | |
1690 | if (sock_flag(sk, flag: SOCK_LINGER) && sk->sk_lingertime && |
1691 | !(current->flags & PF_EXITING)) |
1692 | err = bt_sock_wait_state(sk, state: BT_CLOSED, timeo: sk->sk_lingertime); |
1693 | |
1694 | unlock: |
1695 | release_sock(sk); |
1696 | sock_put(sk); |
1697 | |
1698 | return err; |
1699 | } |
1700 | |
1701 | static int iso_sock_release(struct socket *sock) |
1702 | { |
1703 | struct sock *sk = sock->sk; |
1704 | int err = 0; |
1705 | |
1706 | BT_DBG("sock %p, sk %p" , sock, sk); |
1707 | |
1708 | if (!sk) |
1709 | return 0; |
1710 | |
1711 | iso_sock_close(sk); |
1712 | |
1713 | if (sock_flag(sk, flag: SOCK_LINGER) && READ_ONCE(sk->sk_lingertime) && |
1714 | !(current->flags & PF_EXITING)) { |
1715 | lock_sock(sk); |
1716 | err = bt_sock_wait_state(sk, state: BT_CLOSED, timeo: sk->sk_lingertime); |
1717 | release_sock(sk); |
1718 | } |
1719 | |
1720 | sock_orphan(sk); |
1721 | iso_sock_kill(sk); |
1722 | return err; |
1723 | } |
1724 | |
1725 | static void iso_sock_ready(struct sock *sk) |
1726 | { |
1727 | BT_DBG("sk %p" , sk); |
1728 | |
1729 | if (!sk) |
1730 | return; |
1731 | |
1732 | lock_sock(sk); |
1733 | iso_sock_clear_timer(sk); |
1734 | sk->sk_state = BT_CONNECTED; |
1735 | sk->sk_state_change(sk); |
1736 | release_sock(sk); |
1737 | } |
1738 | |
1739 | struct iso_list_data { |
1740 | struct hci_conn *hcon; |
1741 | int count; |
1742 | }; |
1743 | |
1744 | static bool iso_match_big(struct sock *sk, void *data) |
1745 | { |
1746 | struct hci_evt_le_big_sync_estabilished *ev = data; |
1747 | |
1748 | return ev->handle == iso_pi(sk)->qos.bcast.big; |
1749 | } |
1750 | |
1751 | static bool iso_match_pa_sync_flag(struct sock *sk, void *data) |
1752 | { |
1753 | return test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags); |
1754 | } |
1755 | |
1756 | static void iso_conn_ready(struct iso_conn *conn) |
1757 | { |
1758 | struct sock *parent = NULL; |
1759 | struct sock *sk = conn->sk; |
1760 | struct hci_ev_le_big_sync_estabilished *ev = NULL; |
1761 | struct hci_ev_le_pa_sync_established *ev2 = NULL; |
1762 | struct hci_evt_le_big_info_adv_report *ev3 = NULL; |
1763 | struct hci_conn *hcon; |
1764 | |
1765 | BT_DBG("conn %p" , conn); |
1766 | |
1767 | if (sk) { |
1768 | iso_sock_ready(sk: conn->sk); |
1769 | } else { |
1770 | hcon = conn->hcon; |
1771 | if (!hcon) |
1772 | return; |
1773 | |
1774 | if (test_bit(HCI_CONN_BIG_SYNC, &hcon->flags) || |
1775 | test_bit(HCI_CONN_BIG_SYNC_FAILED, &hcon->flags)) { |
1776 | ev = hci_recv_event_data(hdev: hcon->hdev, |
1777 | HCI_EVT_LE_BIG_SYNC_ESTABILISHED); |
1778 | |
1779 | /* Get reference to PA sync parent socket, if it exists */ |
1780 | parent = iso_get_sock_listen(src: &hcon->src, |
1781 | dst: &hcon->dst, |
1782 | match: iso_match_pa_sync_flag, NULL); |
1783 | if (!parent && ev) |
1784 | parent = iso_get_sock_listen(src: &hcon->src, |
1785 | dst: &hcon->dst, |
1786 | match: iso_match_big, data: ev); |
1787 | } else if (test_bit(HCI_CONN_PA_SYNC_FAILED, &hcon->flags)) { |
1788 | ev2 = hci_recv_event_data(hdev: hcon->hdev, |
1789 | HCI_EV_LE_PA_SYNC_ESTABLISHED); |
1790 | if (ev2) |
1791 | parent = iso_get_sock_listen(src: &hcon->src, |
1792 | dst: &hcon->dst, |
1793 | match: iso_match_sid, data: ev2); |
1794 | } else if (test_bit(HCI_CONN_PA_SYNC, &hcon->flags)) { |
1795 | ev3 = hci_recv_event_data(hdev: hcon->hdev, |
1796 | HCI_EVT_LE_BIG_INFO_ADV_REPORT); |
1797 | if (ev3) |
1798 | parent = iso_get_sock_listen(src: &hcon->src, |
1799 | dst: &hcon->dst, |
1800 | match: iso_match_sync_handle, data: ev3); |
1801 | } |
1802 | |
1803 | if (!parent) |
1804 | parent = iso_get_sock_listen(src: &hcon->src, |
1805 | BDADDR_ANY, NULL, NULL); |
1806 | |
1807 | if (!parent) |
1808 | return; |
1809 | |
1810 | lock_sock(sk: parent); |
1811 | |
1812 | sk = iso_sock_alloc(net: sock_net(sk: parent), NULL, |
1813 | BTPROTO_ISO, GFP_ATOMIC, kern: 0); |
1814 | if (!sk) { |
1815 | release_sock(sk: parent); |
1816 | return; |
1817 | } |
1818 | |
1819 | iso_sock_init(sk, parent); |
1820 | |
1821 | bacpy(dst: &iso_pi(sk)->src, src: &hcon->src); |
1822 | |
1823 | /* Convert from HCI to three-value type */ |
1824 | if (hcon->src_type == ADDR_LE_DEV_PUBLIC) |
1825 | iso_pi(sk)->src_type = BDADDR_LE_PUBLIC; |
1826 | else |
1827 | iso_pi(sk)->src_type = BDADDR_LE_RANDOM; |
1828 | |
1829 | /* If hcon has no destination address (BDADDR_ANY) it means it |
1830 | * was created by HCI_EV_LE_BIG_SYNC_ESTABILISHED or |
1831 | * HCI_EV_LE_PA_SYNC_ESTABLISHED so we need to initialize using |
1832 | * the parent socket destination address. |
1833 | */ |
1834 | if (!bacmp(ba1: &hcon->dst, BDADDR_ANY)) { |
1835 | bacpy(dst: &hcon->dst, src: &iso_pi(parent)->dst); |
1836 | hcon->dst_type = iso_pi(parent)->dst_type; |
1837 | hcon->sync_handle = iso_pi(parent)->sync_handle; |
1838 | } |
1839 | |
1840 | if (ev3) { |
1841 | iso_pi(sk)->qos = iso_pi(parent)->qos; |
1842 | iso_pi(sk)->qos.bcast.encryption = ev3->encryption; |
1843 | hcon->iso_qos = iso_pi(sk)->qos; |
1844 | iso_pi(sk)->bc_num_bis = iso_pi(parent)->bc_num_bis; |
1845 | memcpy(iso_pi(sk)->bc_bis, iso_pi(parent)->bc_bis, ISO_MAX_NUM_BIS); |
1846 | set_bit(nr: BT_SK_PA_SYNC, addr: &iso_pi(sk)->flags); |
1847 | } |
1848 | |
1849 | bacpy(dst: &iso_pi(sk)->dst, src: &hcon->dst); |
1850 | iso_pi(sk)->dst_type = hcon->dst_type; |
1851 | iso_pi(sk)->sync_handle = iso_pi(parent)->sync_handle; |
1852 | memcpy(iso_pi(sk)->base, iso_pi(parent)->base, iso_pi(parent)->base_len); |
1853 | iso_pi(sk)->base_len = iso_pi(parent)->base_len; |
1854 | |
1855 | hci_conn_hold(conn: hcon); |
1856 | iso_chan_add(conn, sk, parent); |
1857 | |
1858 | if ((ev && ((struct hci_evt_le_big_sync_estabilished *)ev)->status) || |
1859 | (ev2 && ev2->status)) { |
1860 | /* Trigger error signal on child socket */ |
1861 | sk->sk_err = ECONNREFUSED; |
1862 | sk->sk_error_report(sk); |
1863 | } |
1864 | |
1865 | if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) |
1866 | sk->sk_state = BT_CONNECT2; |
1867 | else |
1868 | sk->sk_state = BT_CONNECTED; |
1869 | |
1870 | /* Wake up parent */ |
1871 | parent->sk_data_ready(parent); |
1872 | |
1873 | release_sock(sk: parent); |
1874 | sock_put(sk: parent); |
1875 | } |
1876 | } |
1877 | |
1878 | static bool iso_match_sid(struct sock *sk, void *data) |
1879 | { |
1880 | struct hci_ev_le_pa_sync_established *ev = data; |
1881 | |
1882 | return ev->sid == iso_pi(sk)->bc_sid; |
1883 | } |
1884 | |
1885 | static bool iso_match_sync_handle(struct sock *sk, void *data) |
1886 | { |
1887 | struct hci_evt_le_big_info_adv_report *ev = data; |
1888 | |
1889 | return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle; |
1890 | } |
1891 | |
1892 | static bool iso_match_sync_handle_pa_report(struct sock *sk, void *data) |
1893 | { |
1894 | struct hci_ev_le_per_adv_report *ev = data; |
1895 | |
1896 | return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle; |
1897 | } |
1898 | |
1899 | /* ----- ISO interface with lower layer (HCI) ----- */ |
1900 | |
1901 | int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags) |
1902 | { |
1903 | struct hci_ev_le_pa_sync_established *ev1; |
1904 | struct hci_evt_le_big_info_adv_report *ev2; |
1905 | struct hci_ev_le_per_adv_report *ev3; |
1906 | struct sock *sk; |
1907 | |
1908 | bt_dev_dbg(hdev, "bdaddr %pMR" , bdaddr); |
1909 | |
1910 | /* Broadcast receiver requires handling of some events before it can |
1911 | * proceed to establishing a BIG sync: |
1912 | * |
1913 | * 1. HCI_EV_LE_PA_SYNC_ESTABLISHED: The socket may specify a specific |
1914 | * SID to listen to and once sync is estabilished its handle needs to |
1915 | * be stored in iso_pi(sk)->sync_handle so it can be matched once |
1916 | * receiving the BIG Info. |
1917 | * 2. HCI_EVT_LE_BIG_INFO_ADV_REPORT: When connect_ind is triggered by a |
1918 | * a BIG Info it attempts to check if there any listening socket with |
1919 | * the same sync_handle and if it does then attempt to create a sync. |
1920 | * 3. HCI_EV_LE_PER_ADV_REPORT: When a PA report is received, it is stored |
1921 | * in iso_pi(sk)->base so it can be passed up to user, in the case of a |
1922 | * broadcast sink. |
1923 | */ |
1924 | ev1 = hci_recv_event_data(hdev, HCI_EV_LE_PA_SYNC_ESTABLISHED); |
1925 | if (ev1) { |
1926 | sk = iso_get_sock_listen(src: &hdev->bdaddr, dst: bdaddr, match: iso_match_sid, |
1927 | data: ev1); |
1928 | if (sk && !ev1->status) |
1929 | iso_pi(sk)->sync_handle = le16_to_cpu(ev1->handle); |
1930 | |
1931 | goto done; |
1932 | } |
1933 | |
1934 | ev2 = hci_recv_event_data(hdev, HCI_EVT_LE_BIG_INFO_ADV_REPORT); |
1935 | if (ev2) { |
1936 | /* Try to get PA sync listening socket, if it exists */ |
1937 | sk = iso_get_sock_listen(src: &hdev->bdaddr, dst: bdaddr, |
1938 | match: iso_match_pa_sync_flag, NULL); |
1939 | |
1940 | if (!sk) { |
1941 | sk = iso_get_sock_listen(src: &hdev->bdaddr, dst: bdaddr, |
1942 | match: iso_match_sync_handle, data: ev2); |
1943 | |
1944 | /* If PA Sync is in process of terminating, |
1945 | * do not handle any more BIGInfo adv reports. |
1946 | */ |
1947 | |
1948 | if (sk && test_bit(BT_SK_PA_SYNC_TERM, |
1949 | &iso_pi(sk)->flags)) |
1950 | return 0; |
1951 | } |
1952 | |
1953 | if (sk) { |
1954 | int err; |
1955 | |
1956 | if (ev2->num_bis < iso_pi(sk)->bc_num_bis) |
1957 | iso_pi(sk)->bc_num_bis = ev2->num_bis; |
1958 | |
1959 | if (!test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags) && |
1960 | !test_and_set_bit(nr: BT_SK_BIG_SYNC, addr: &iso_pi(sk)->flags)) { |
1961 | err = hci_le_big_create_sync(hdev, NULL, |
1962 | qos: &iso_pi(sk)->qos, |
1963 | iso_pi(sk)->sync_handle, |
1964 | iso_pi(sk)->bc_num_bis, |
1965 | iso_pi(sk)->bc_bis); |
1966 | if (err) { |
1967 | bt_dev_err(hdev, "hci_le_big_create_sync: %d" , |
1968 | err); |
1969 | sock_put(sk); |
1970 | sk = NULL; |
1971 | } |
1972 | } |
1973 | } |
1974 | } |
1975 | |
1976 | ev3 = hci_recv_event_data(hdev, HCI_EV_LE_PER_ADV_REPORT); |
1977 | if (ev3) { |
1978 | size_t base_len = 0; |
1979 | u8 *base; |
1980 | struct hci_conn *hcon; |
1981 | |
1982 | sk = iso_get_sock_listen(src: &hdev->bdaddr, dst: bdaddr, |
1983 | match: iso_match_sync_handle_pa_report, data: ev3); |
1984 | if (!sk) |
1985 | goto done; |
1986 | |
1987 | hcon = iso_pi(sk)->conn->hcon; |
1988 | if (!hcon) |
1989 | goto done; |
1990 | |
1991 | if (ev3->data_status == LE_PA_DATA_TRUNCATED) { |
1992 | /* The controller was unable to retrieve PA data. */ |
1993 | memset(hcon->le_per_adv_data, 0, |
1994 | HCI_MAX_PER_AD_TOT_LEN); |
1995 | hcon->le_per_adv_data_len = 0; |
1996 | hcon->le_per_adv_data_offset = 0; |
1997 | goto done; |
1998 | } |
1999 | |
2000 | if (hcon->le_per_adv_data_offset + ev3->length > |
2001 | HCI_MAX_PER_AD_TOT_LEN) |
2002 | goto done; |
2003 | |
2004 | memcpy(hcon->le_per_adv_data + hcon->le_per_adv_data_offset, |
2005 | ev3->data, ev3->length); |
2006 | hcon->le_per_adv_data_offset += ev3->length; |
2007 | |
2008 | if (ev3->data_status == LE_PA_DATA_COMPLETE) { |
2009 | /* All PA data has been received. */ |
2010 | hcon->le_per_adv_data_len = |
2011 | hcon->le_per_adv_data_offset; |
2012 | hcon->le_per_adv_data_offset = 0; |
2013 | |
2014 | /* Extract BASE */ |
2015 | base = eir_get_service_data(eir: hcon->le_per_adv_data, |
2016 | eir_len: hcon->le_per_adv_data_len, |
2017 | EIR_BAA_SERVICE_UUID, |
2018 | len: &base_len); |
2019 | |
2020 | if (!base || base_len > BASE_MAX_LENGTH) |
2021 | goto done; |
2022 | |
2023 | memcpy(iso_pi(sk)->base, base, base_len); |
2024 | iso_pi(sk)->base_len = base_len; |
2025 | } else { |
2026 | /* This is a PA data fragment. Keep pa_data_len set to 0 |
2027 | * until all data has been reassembled. |
2028 | */ |
2029 | hcon->le_per_adv_data_len = 0; |
2030 | } |
2031 | } else { |
2032 | sk = iso_get_sock_listen(src: &hdev->bdaddr, BDADDR_ANY, NULL, NULL); |
2033 | } |
2034 | |
2035 | done: |
2036 | if (!sk) |
2037 | return 0; |
2038 | |
2039 | if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) |
2040 | *flags |= HCI_PROTO_DEFER; |
2041 | |
2042 | sock_put(sk); |
2043 | |
2044 | return HCI_LM_ACCEPT; |
2045 | } |
2046 | |
2047 | static void iso_connect_cfm(struct hci_conn *hcon, __u8 status) |
2048 | { |
2049 | if (hcon->type != ISO_LINK) { |
2050 | if (hcon->type != LE_LINK) |
2051 | return; |
2052 | |
2053 | /* Check if LE link has failed */ |
2054 | if (status) { |
2055 | struct hci_link *link, *t; |
2056 | |
2057 | list_for_each_entry_safe(link, t, &hcon->link_list, |
2058 | list) |
2059 | iso_conn_del(hcon: link->conn, err: bt_to_errno(code: status)); |
2060 | |
2061 | return; |
2062 | } |
2063 | |
2064 | /* Create CIS if pending */ |
2065 | hci_le_create_cis_pending(hdev: hcon->hdev); |
2066 | return; |
2067 | } |
2068 | |
2069 | BT_DBG("hcon %p bdaddr %pMR status %d" , hcon, &hcon->dst, status); |
2070 | |
2071 | /* Similar to the success case, if HCI_CONN_BIG_SYNC_FAILED or |
2072 | * HCI_CONN_PA_SYNC_FAILED is set, queue the failed connection |
2073 | * into the accept queue of the listening socket and wake up |
2074 | * userspace, to inform the user about the event. |
2075 | */ |
2076 | if (!status || test_bit(HCI_CONN_BIG_SYNC_FAILED, &hcon->flags) || |
2077 | test_bit(HCI_CONN_PA_SYNC_FAILED, &hcon->flags)) { |
2078 | struct iso_conn *conn; |
2079 | |
2080 | conn = iso_conn_add(hcon); |
2081 | if (conn) |
2082 | iso_conn_ready(conn); |
2083 | } else { |
2084 | iso_conn_del(hcon, err: bt_to_errno(code: status)); |
2085 | } |
2086 | } |
2087 | |
2088 | static void iso_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
2089 | { |
2090 | if (hcon->type != ISO_LINK) |
2091 | return; |
2092 | |
2093 | BT_DBG("hcon %p reason %d" , hcon, reason); |
2094 | |
2095 | iso_conn_del(hcon, err: bt_to_errno(code: reason)); |
2096 | } |
2097 | |
2098 | void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
2099 | { |
2100 | struct iso_conn *conn = hcon->iso_data; |
2101 | __u16 pb, ts, len; |
2102 | |
2103 | if (!conn) |
2104 | goto drop; |
2105 | |
2106 | pb = hci_iso_flags_pb(flags); |
2107 | ts = hci_iso_flags_ts(flags); |
2108 | |
2109 | BT_DBG("conn %p len %d pb 0x%x ts 0x%x" , conn, skb->len, pb, ts); |
2110 | |
2111 | switch (pb) { |
2112 | case ISO_START: |
2113 | case ISO_SINGLE: |
2114 | if (conn->rx_len) { |
2115 | BT_ERR("Unexpected start frame (len %d)" , skb->len); |
2116 | kfree_skb(skb: conn->rx_skb); |
2117 | conn->rx_skb = NULL; |
2118 | conn->rx_len = 0; |
2119 | } |
2120 | |
2121 | if (ts) { |
2122 | struct hci_iso_ts_data_hdr *hdr; |
2123 | |
2124 | /* TODO: add timestamp to the packet? */ |
2125 | hdr = skb_pull_data(skb, HCI_ISO_TS_DATA_HDR_SIZE); |
2126 | if (!hdr) { |
2127 | BT_ERR("Frame is too short (len %d)" , skb->len); |
2128 | goto drop; |
2129 | } |
2130 | |
2131 | len = __le16_to_cpu(hdr->slen); |
2132 | } else { |
2133 | struct hci_iso_data_hdr *hdr; |
2134 | |
2135 | hdr = skb_pull_data(skb, HCI_ISO_DATA_HDR_SIZE); |
2136 | if (!hdr) { |
2137 | BT_ERR("Frame is too short (len %d)" , skb->len); |
2138 | goto drop; |
2139 | } |
2140 | |
2141 | len = __le16_to_cpu(hdr->slen); |
2142 | } |
2143 | |
2144 | flags = hci_iso_data_flags(len); |
2145 | len = hci_iso_data_len(len); |
2146 | |
2147 | BT_DBG("Start: total len %d, frag len %d flags 0x%4.4x" , len, |
2148 | skb->len, flags); |
2149 | |
2150 | if (len == skb->len) { |
2151 | /* Complete frame received */ |
2152 | hci_skb_pkt_status(skb) = flags & 0x03; |
2153 | iso_recv_frame(conn, skb); |
2154 | return; |
2155 | } |
2156 | |
2157 | if (pb == ISO_SINGLE) { |
2158 | BT_ERR("Frame malformed (len %d, expected len %d)" , |
2159 | skb->len, len); |
2160 | goto drop; |
2161 | } |
2162 | |
2163 | if (skb->len > len) { |
2164 | BT_ERR("Frame is too long (len %d, expected len %d)" , |
2165 | skb->len, len); |
2166 | goto drop; |
2167 | } |
2168 | |
2169 | /* Allocate skb for the complete frame (with header) */ |
2170 | conn->rx_skb = bt_skb_alloc(len, GFP_KERNEL); |
2171 | if (!conn->rx_skb) |
2172 | goto drop; |
2173 | |
2174 | hci_skb_pkt_status(conn->rx_skb) = flags & 0x03; |
2175 | skb_copy_from_linear_data(skb, to: skb_put(skb: conn->rx_skb, len: skb->len), |
2176 | len: skb->len); |
2177 | conn->rx_len = len - skb->len; |
2178 | break; |
2179 | |
2180 | case ISO_CONT: |
2181 | BT_DBG("Cont: frag len %d (expecting %d)" , skb->len, |
2182 | conn->rx_len); |
2183 | |
2184 | if (!conn->rx_len) { |
2185 | BT_ERR("Unexpected continuation frame (len %d)" , |
2186 | skb->len); |
2187 | goto drop; |
2188 | } |
2189 | |
2190 | if (skb->len > conn->rx_len) { |
2191 | BT_ERR("Fragment is too long (len %d, expected %d)" , |
2192 | skb->len, conn->rx_len); |
2193 | kfree_skb(skb: conn->rx_skb); |
2194 | conn->rx_skb = NULL; |
2195 | conn->rx_len = 0; |
2196 | goto drop; |
2197 | } |
2198 | |
2199 | skb_copy_from_linear_data(skb, to: skb_put(skb: conn->rx_skb, len: skb->len), |
2200 | len: skb->len); |
2201 | conn->rx_len -= skb->len; |
2202 | return; |
2203 | |
2204 | case ISO_END: |
2205 | skb_copy_from_linear_data(skb, to: skb_put(skb: conn->rx_skb, len: skb->len), |
2206 | len: skb->len); |
2207 | conn->rx_len -= skb->len; |
2208 | |
2209 | if (!conn->rx_len) { |
2210 | struct sk_buff *rx_skb = conn->rx_skb; |
2211 | |
2212 | /* Complete frame received. iso_recv_frame |
2213 | * takes ownership of the skb so set the global |
2214 | * rx_skb pointer to NULL first. |
2215 | */ |
2216 | conn->rx_skb = NULL; |
2217 | iso_recv_frame(conn, skb: rx_skb); |
2218 | } |
2219 | break; |
2220 | } |
2221 | |
2222 | drop: |
2223 | kfree_skb(skb); |
2224 | } |
2225 | |
2226 | static struct hci_cb iso_cb = { |
2227 | .name = "ISO" , |
2228 | .connect_cfm = iso_connect_cfm, |
2229 | .disconn_cfm = iso_disconn_cfm, |
2230 | }; |
2231 | |
2232 | static int iso_debugfs_show(struct seq_file *f, void *p) |
2233 | { |
2234 | struct sock *sk; |
2235 | |
2236 | read_lock(&iso_sk_list.lock); |
2237 | |
2238 | sk_for_each(sk, &iso_sk_list.head) { |
2239 | seq_printf(m: f, fmt: "%pMR %pMR %d\n" , &iso_pi(sk)->src, |
2240 | &iso_pi(sk)->dst, sk->sk_state); |
2241 | } |
2242 | |
2243 | read_unlock(&iso_sk_list.lock); |
2244 | |
2245 | return 0; |
2246 | } |
2247 | |
2248 | DEFINE_SHOW_ATTRIBUTE(iso_debugfs); |
2249 | |
2250 | static struct dentry *iso_debugfs; |
2251 | |
2252 | static const struct proto_ops iso_sock_ops = { |
2253 | .family = PF_BLUETOOTH, |
2254 | .owner = THIS_MODULE, |
2255 | .release = iso_sock_release, |
2256 | .bind = iso_sock_bind, |
2257 | .connect = iso_sock_connect, |
2258 | .listen = iso_sock_listen, |
2259 | .accept = iso_sock_accept, |
2260 | .getname = iso_sock_getname, |
2261 | .sendmsg = iso_sock_sendmsg, |
2262 | .recvmsg = iso_sock_recvmsg, |
2263 | .poll = bt_sock_poll, |
2264 | .ioctl = bt_sock_ioctl, |
2265 | .mmap = sock_no_mmap, |
2266 | .socketpair = sock_no_socketpair, |
2267 | .shutdown = iso_sock_shutdown, |
2268 | .setsockopt = iso_sock_setsockopt, |
2269 | .getsockopt = iso_sock_getsockopt |
2270 | }; |
2271 | |
2272 | static const struct net_proto_family iso_sock_family_ops = { |
2273 | .family = PF_BLUETOOTH, |
2274 | .owner = THIS_MODULE, |
2275 | .create = iso_sock_create, |
2276 | }; |
2277 | |
2278 | static bool iso_inited; |
2279 | |
2280 | bool iso_enabled(void) |
2281 | { |
2282 | return iso_inited; |
2283 | } |
2284 | |
2285 | int iso_init(void) |
2286 | { |
2287 | int err; |
2288 | |
2289 | BUILD_BUG_ON(sizeof(struct sockaddr_iso) > sizeof(struct sockaddr)); |
2290 | |
2291 | if (iso_inited) |
2292 | return -EALREADY; |
2293 | |
2294 | err = proto_register(prot: &iso_proto, alloc_slab: 0); |
2295 | if (err < 0) |
2296 | return err; |
2297 | |
2298 | err = bt_sock_register(BTPROTO_ISO, ops: &iso_sock_family_ops); |
2299 | if (err < 0) { |
2300 | BT_ERR("ISO socket registration failed" ); |
2301 | goto error; |
2302 | } |
2303 | |
2304 | err = bt_procfs_init(net: &init_net, name: "iso" , sk_list: &iso_sk_list, NULL); |
2305 | if (err < 0) { |
2306 | BT_ERR("Failed to create ISO proc file" ); |
2307 | bt_sock_unregister(BTPROTO_ISO); |
2308 | goto error; |
2309 | } |
2310 | |
2311 | BT_INFO("ISO socket layer initialized" ); |
2312 | |
2313 | hci_register_cb(hcb: &iso_cb); |
2314 | |
2315 | if (IS_ERR_OR_NULL(ptr: bt_debugfs)) |
2316 | return 0; |
2317 | |
2318 | if (!iso_debugfs) { |
2319 | iso_debugfs = debugfs_create_file(name: "iso" , mode: 0444, parent: bt_debugfs, |
2320 | NULL, fops: &iso_debugfs_fops); |
2321 | } |
2322 | |
2323 | iso_inited = true; |
2324 | |
2325 | return 0; |
2326 | |
2327 | error: |
2328 | proto_unregister(prot: &iso_proto); |
2329 | return err; |
2330 | } |
2331 | |
2332 | int iso_exit(void) |
2333 | { |
2334 | if (!iso_inited) |
2335 | return -EALREADY; |
2336 | |
2337 | bt_procfs_cleanup(net: &init_net, name: "iso" ); |
2338 | |
2339 | debugfs_remove(dentry: iso_debugfs); |
2340 | iso_debugfs = NULL; |
2341 | |
2342 | hci_unregister_cb(hcb: &iso_cb); |
2343 | |
2344 | bt_sock_unregister(BTPROTO_ISO); |
2345 | |
2346 | proto_unregister(prot: &iso_proto); |
2347 | |
2348 | iso_inited = false; |
2349 | |
2350 | return 0; |
2351 | } |
2352 | |