Commit | Line | Data |
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ccf74f23 LAD |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * BlueZ - Bluetooth protocol stack for Linux | |
4 | * | |
5 | * Copyright (C) 2022 Intel Corporation | |
0fe8c8d0 | 6 | * Copyright 2023 NXP |
ccf74f23 LAD |
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 | ||
b4443423 LAD |
48 | #define EIR_SERVICE_DATA_LENGTH 4 |
49 | #define BASE_MAX_LENGTH (HCI_MAX_PER_AD_LENGTH - EIR_SERVICE_DATA_LENGTH) | |
50 | ||
f777d882 IT |
51 | /* iso_pinfo flags values */ |
52 | enum { | |
53 | BT_SK_BIG_SYNC, | |
fbdc4bc4 | 54 | BT_SK_PA_SYNC, |
f777d882 IT |
55 | }; |
56 | ||
ccf74f23 LAD |
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; | |
f764a6c2 LAD |
63 | __u8 bc_sid; |
64 | __u8 bc_num_bis; | |
65 | __u8 bc_bis[ISO_MAX_NUM_BIS]; | |
66 | __u16 sync_handle; | |
f777d882 | 67 | unsigned long flags; |
ccf74f23 | 68 | struct bt_iso_qos qos; |
0fe8c8d0 | 69 | bool qos_user_set; |
f764a6c2 | 70 | __u8 base_len; |
b4443423 | 71 | __u8 base[BASE_MAX_LENGTH]; |
ccf74f23 LAD |
72 | struct iso_conn *conn; |
73 | }; | |
74 | ||
0fe8c8d0 IT |
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); | |
fbdc4bc4 IT |
79 | static bool iso_match_sid(struct sock *sk, void *data); |
80 | static void iso_sock_disconn(struct sock *sk); | |
0fe8c8d0 | 81 | |
ccf74f23 LAD |
82 | /* ---- ISO timers ---- */ |
83 | #define ISO_CONN_TIMEOUT (HZ * 40) | |
84 | #define ISO_DISCONN_TIMEOUT (HZ * 2) | |
85 | ||
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 | ||
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 | ||
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 ---- */ | |
130 | static struct iso_conn *iso_conn_add(struct hci_conn *hcon) | |
131 | { | |
132 | struct iso_conn *conn = hcon->iso_data; | |
133 | ||
d40ae85e PV |
134 | if (conn) { |
135 | if (!conn->hcon) | |
136 | conn->hcon = hcon; | |
ccf74f23 | 137 | return conn; |
d40ae85e | 138 | } |
ccf74f23 LAD |
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. */ | |
157 | static void iso_chan_del(struct sock *sk, int err) | |
158 | { | |
159 | struct iso_conn *conn; | |
f764a6c2 | 160 | struct sock *parent; |
ccf74f23 LAD |
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; | |
f764a6c2 LAD |
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 | } | |
ccf74f23 LAD |
186 | |
187 | sock_set_flag(sk, SOCK_ZAPPED); | |
188 | } | |
189 | ||
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 | ||
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 | ||
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 | ||
b36a234d PV |
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 | ||
f764a6c2 LAD |
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; | |
241f5193 | 282 | goto unlock; |
f764a6c2 LAD |
283 | } |
284 | ||
0fe8c8d0 IT |
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 | ||
f764a6c2 | 292 | /* Fail if out PHYs are marked as disabled */ |
0fe8c8d0 | 293 | if (!iso_pi(sk)->qos.bcast.out.phy) { |
f764a6c2 | 294 | err = -EINVAL; |
241f5193 | 295 | goto unlock; |
f764a6c2 LAD |
296 | } |
297 | ||
a0bfde16 IT |
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 | } | |
f764a6c2 LAD |
316 | } |
317 | ||
318 | conn = iso_conn_add(hcon); | |
319 | if (!conn) { | |
320 | hci_conn_drop(hcon); | |
321 | err = -ENOMEM; | |
241f5193 | 322 | goto unlock; |
f764a6c2 LAD |
323 | } |
324 | ||
d40ae85e | 325 | lock_sock(sk); |
241f5193 | 326 | |
6a5ad251 | 327 | err = iso_chan_add(conn, sk, NULL); |
d40ae85e PV |
328 | if (err) { |
329 | release_sock(sk); | |
330 | goto unlock; | |
331 | } | |
241f5193 | 332 | |
f764a6c2 LAD |
333 | /* Update source addr of the socket */ |
334 | bacpy(&iso_pi(sk)->src, &hcon->src); | |
335 | ||
f764a6c2 LAD |
336 | if (hcon->state == BT_CONNECTED) { |
337 | iso_sock_clear_timer(sk); | |
338 | sk->sk_state = BT_CONNECTED; | |
a0bfde16 IT |
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; | |
f764a6c2 LAD |
342 | } else { |
343 | sk->sk_state = BT_CONNECT; | |
344 | iso_sock_set_timer(sk, sk->sk_sndtimeo); | |
345 | } | |
346 | ||
241f5193 | 347 | release_sock(sk); |
241f5193 LAD |
348 | |
349 | unlock: | |
f764a6c2 LAD |
350 | hci_dev_unlock(hdev); |
351 | hci_dev_put(hdev); | |
352 | return err; | |
353 | } | |
354 | ||
355 | static int iso_connect_cis(struct sock *sk) | |
ccf74f23 LAD |
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; | |
241f5193 | 373 | goto unlock; |
ccf74f23 LAD |
374 | } |
375 | ||
0fe8c8d0 IT |
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 | ||
ccf74f23 | 383 | /* Fail if either PHYs are marked as disabled */ |
0fe8c8d0 | 384 | if (!iso_pi(sk)->qos.ucast.in.phy && !iso_pi(sk)->qos.ucast.out.phy) { |
ccf74f23 | 385 | err = -EINVAL; |
241f5193 | 386 | goto unlock; |
ccf74f23 LAD |
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, | |
b36a234d PV |
392 | le_addr_type(iso_pi(sk)->dst_type), |
393 | &iso_pi(sk)->qos); | |
ccf74f23 LAD |
394 | if (IS_ERR(hcon)) { |
395 | err = PTR_ERR(hcon); | |
241f5193 | 396 | goto unlock; |
ccf74f23 LAD |
397 | } |
398 | } else { | |
399 | hcon = hci_connect_cis(hdev, &iso_pi(sk)->dst, | |
b36a234d PV |
400 | le_addr_type(iso_pi(sk)->dst_type), |
401 | &iso_pi(sk)->qos); | |
ccf74f23 LAD |
402 | if (IS_ERR(hcon)) { |
403 | err = PTR_ERR(hcon); | |
241f5193 | 404 | goto unlock; |
ccf74f23 LAD |
405 | } |
406 | } | |
407 | ||
408 | conn = iso_conn_add(hcon); | |
409 | if (!conn) { | |
410 | hci_conn_drop(hcon); | |
411 | err = -ENOMEM; | |
241f5193 | 412 | goto unlock; |
ccf74f23 LAD |
413 | } |
414 | ||
d40ae85e | 415 | lock_sock(sk); |
241f5193 | 416 | |
6a5ad251 | 417 | err = iso_chan_add(conn, sk, NULL); |
d40ae85e PV |
418 | if (err) { |
419 | release_sock(sk); | |
420 | goto unlock; | |
421 | } | |
241f5193 | 422 | |
ccf74f23 LAD |
423 | /* Update source addr of the socket */ |
424 | bacpy(&iso_pi(sk)->src, &hcon->src); | |
425 | ||
ccf74f23 LAD |
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 | ||
241f5193 | 437 | release_sock(sk); |
241f5193 LAD |
438 | |
439 | unlock: | |
ccf74f23 LAD |
440 | hci_dev_unlock(hdev); |
441 | hci_dev_put(hdev); | |
442 | return err; | |
443 | } | |
444 | ||
1d1ab5d3 LAD |
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 | ||
ccf74f23 LAD |
453 | static int iso_send_frame(struct sock *sk, struct sk_buff *skb) |
454 | { | |
455 | struct iso_conn *conn = iso_pi(sk)->conn; | |
1d1ab5d3 | 456 | struct bt_iso_qos *qos = iso_sock_get_qos(sk); |
ccf74f23 LAD |
457 | struct hci_iso_data_hdr *hdr; |
458 | int len = 0; | |
459 | ||
460 | BT_DBG("sk %p len %d", sk, skb->len); | |
461 | ||
0fe8c8d0 | 462 | if (skb->len > qos->ucast.out.sdu) |
ccf74f23 LAD |
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 | ||
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 ---------- */ | |
e0275ea5 | 505 | static struct sock *__iso_get_sock_listen_by_addr(bdaddr_t *src, bdaddr_t *dst) |
ccf74f23 LAD |
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 | ||
e0275ea5 LAD |
513 | if (bacmp(&iso_pi(sk)->dst, dst)) |
514 | continue; | |
515 | ||
516 | if (!bacmp(&iso_pi(sk)->src, src)) | |
ccf74f23 LAD |
517 | return sk; |
518 | } | |
519 | ||
520 | return NULL; | |
521 | } | |
522 | ||
f764a6c2 LAD |
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 | |
ccf74f23 LAD |
552 | * Returns closest match. |
553 | */ | |
f764a6c2 LAD |
554 | static struct sock *iso_get_sock_listen(bdaddr_t *src, bdaddr_t *dst, |
555 | iso_sock_match_t match, void *data) | |
ccf74f23 LAD |
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 | ||
f764a6c2 LAD |
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 | ||
ccf74f23 LAD |
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 | ||
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 | ||
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 | ||
fbdc4bc4 IT |
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 | ||
ccf74f23 LAD |
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 | */ | |
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 | ||
fbdc4bc4 IT |
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 | ||
ccf74f23 LAD |
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 | ||
69997d50 | 656 | case BT_CONNECT: |
ccf74f23 LAD |
657 | case BT_CONNECTED: |
658 | case BT_CONFIG: | |
fbdc4bc4 IT |
659 | if (iso_pi(sk)->conn->hcon) |
660 | iso_sock_disconn(sk); | |
661 | else | |
ccf74f23 | 662 | iso_chan_del(sk, ECONNRESET); |
ccf74f23 LAD |
663 | break; |
664 | ||
665 | case BT_CONNECT2: | |
fbdc4bc4 IT |
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); | |
ccf74f23 LAD |
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. */ | |
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 | ||
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 = { | |
0fe8c8d0 IT |
720 | .bcast = { |
721 | .big = BT_ISO_QOS_BIG_UNSET, | |
722 | .bis = BT_ISO_QOS_BIS_UNSET, | |
14f0dcec | 723 | .sync_factor = 0x01, |
0fe8c8d0 IT |
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 | }, | |
ccf74f23 LAD |
737 | }; |
738 | ||
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 | ||
6bfa273e | 744 | sk = bt_sock_alloc(net, sock, &iso_proto, proto, prio, kern); |
ccf74f23 LAD |
745 | if (!sk) |
746 | return NULL; | |
747 | ||
ccf74f23 LAD |
748 | sk->sk_destruct = iso_sock_destruct; |
749 | sk->sk_sndtimeo = ISO_CONN_TIMEOUT; | |
750 | ||
ccf74f23 LAD |
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 | ||
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 | ||
f764a6c2 LAD |
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 | ||
ccf74f23 LAD |
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 | ||
f764a6c2 LAD |
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 | ||
ccf74f23 LAD |
855 | sk->sk_state = BT_BOUND; |
856 | ||
857 | done: | |
858 | release_sock(sk); | |
859 | return err; | |
860 | } | |
861 | ||
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 | ||
241f5193 LAD |
890 | release_sock(sk); |
891 | ||
f764a6c2 LAD |
892 | if (bacmp(&iso_pi(sk)->dst, BDADDR_ANY)) |
893 | err = iso_connect_cis(sk); | |
894 | else | |
895 | err = iso_connect_bis(sk); | |
896 | ||
ccf74f23 | 897 | if (err) |
241f5193 LAD |
898 | return err; |
899 | ||
900 | lock_sock(sk); | |
ccf74f23 LAD |
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 | ||
ccf74f23 LAD |
907 | release_sock(sk); |
908 | return err; | |
909 | } | |
910 | ||
f764a6c2 LAD |
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 | ||
0fe8c8d0 IT |
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 | ||
d11ab690 PV |
941 | err = hci_pa_create_sync(hdev, &iso_pi(sk)->dst, |
942 | le_addr_type(iso_pi(sk)->dst_type), | |
0fe8c8d0 | 943 | iso_pi(sk)->bc_sid, &iso_pi(sk)->qos); |
f764a6c2 | 944 | |
7e7df2c1 | 945 | hci_dev_put(hdev); |
f764a6c2 LAD |
946 | |
947 | return err; | |
948 | } | |
949 | ||
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 | ||
e0275ea5 | 958 | if (__iso_get_sock_listen_by_addr(&iso_pi(sk)->src, &iso_pi(sk)->dst)) |
f764a6c2 LAD |
959 | err = -EADDRINUSE; |
960 | ||
961 | write_unlock(&iso_sk_list.lock); | |
962 | ||
963 | return err; | |
964 | } | |
965 | ||
ccf74f23 LAD |
966 | static int iso_sock_listen(struct socket *sock, int backlog) |
967 | { | |
968 | struct sock *sk = sock->sk; | |
ccf74f23 LAD |
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 | ||
f764a6c2 LAD |
985 | if (!bacmp(&iso_pi(sk)->dst, BDADDR_ANY)) |
986 | err = iso_listen_cis(sk); | |
987 | else | |
988 | err = iso_listen_bis(sk); | |
ccf74f23 | 989 | |
f764a6c2 LAD |
990 | if (err) |
991 | goto done; | |
ccf74f23 LAD |
992 | |
993 | sk->sk_max_ack_backlog = backlog; | |
994 | sk->sk_ack_backlog = 0; | |
995 | ||
996 | sk->sk_state = BT_LISTEN; | |
997 | ||
ccf74f23 LAD |
998 | done: |
999 | release_sock(sk); | |
1000 | return err; | |
1001 | } | |
1002 | ||
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 | ||
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 | ||
1079 | static int iso_sock_sendmsg(struct socket *sock, struct msghdr *msg, | |
1080 | size_t len) | |
1081 | { | |
1082 | struct sock *sk = sock->sk; | |
ccf74f23 | 1083 | struct sk_buff *skb, **frag; |
d40ae85e | 1084 | size_t mtu; |
ccf74f23 LAD |
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 | ||
d40ae85e PV |
1096 | lock_sock(sk); |
1097 | ||
1098 | if (sk->sk_state != BT_CONNECTED) { | |
1099 | release_sock(sk); | |
ccf74f23 | 1100 | return -ENOTCONN; |
d40ae85e PV |
1101 | } |
1102 | ||
1103 | mtu = iso_pi(sk)->conn->hcon->hdev->iso_mtu; | |
1104 | ||
1105 | release_sock(sk); | |
ccf74f23 | 1106 | |
d40ae85e | 1107 | skb = bt_skb_sendmsg(sk, msg, len, mtu, HCI_ISO_DATA_HDR_SIZE, 0); |
ccf74f23 LAD |
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 | ||
d40ae85e | 1120 | tmp = bt_skb_sendmsg(sk, msg, len, mtu, 0, 0); |
ccf74f23 LAD |
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 | ||
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 | ||
fbdc4bc4 IT |
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 | ||
ccf74f23 LAD |
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); | |
ccf74f23 LAD |
1194 | |
1195 | BT_DBG("sk %p", sk); | |
1196 | ||
ccf74f23 | 1197 | if (test_and_clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { |
d40ae85e | 1198 | lock_sock(sk); |
ccf74f23 LAD |
1199 | switch (sk->sk_state) { |
1200 | case BT_CONNECT2: | |
fbdc4bc4 IT |
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 | } | |
ccf74f23 LAD |
1210 | release_sock(sk); |
1211 | return 0; | |
1212 | case BT_CONNECT: | |
d40ae85e | 1213 | release_sock(sk); |
241f5193 | 1214 | return iso_connect_cis(sk); |
d40ae85e PV |
1215 | default: |
1216 | release_sock(sk); | |
1217 | break; | |
ccf74f23 LAD |
1218 | } |
1219 | } | |
1220 | ||
ccf74f23 LAD |
1221 | return bt_sock_recvmsg(sock, msg, len, flags); |
1222 | } | |
1223 | ||
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 | ||
0fe8c8d0 | 1242 | static bool check_ucast_qos(struct bt_iso_qos *qos) |
ccf74f23 | 1243 | { |
b7f923b1 LAD |
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 | ||
0fe8c8d0 | 1250 | if (qos->ucast.sca > 0x07) |
ccf74f23 LAD |
1251 | return false; |
1252 | ||
0fe8c8d0 | 1253 | if (qos->ucast.packing > 0x01) |
ccf74f23 LAD |
1254 | return false; |
1255 | ||
0fe8c8d0 | 1256 | if (qos->ucast.framing > 0x01) |
ccf74f23 LAD |
1257 | return false; |
1258 | ||
0fe8c8d0 | 1259 | if (!check_io_qos(&qos->ucast.in)) |
ccf74f23 LAD |
1260 | return false; |
1261 | ||
0fe8c8d0 IT |
1262 | if (!check_io_qos(&qos->ucast.out)) |
1263 | return false; | |
1264 | ||
1265 | return true; | |
1266 | } | |
1267 | ||
1268 | static bool check_bcast_qos(struct bt_iso_qos *qos) | |
1269 | { | |
14f0dcec | 1270 | if (qos->bcast.sync_factor == 0x00) |
0fe8c8d0 IT |
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) | |
ccf74f23 LAD |
1304 | return false; |
1305 | ||
1306 | return true; | |
1307 | } | |
1308 | ||
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; | |
0fe8c8d0 | 1314 | struct bt_iso_qos qos = default_qos; |
ccf74f23 LAD |
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 | ||
0731c5ab LAD |
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 | ||
ccf74f23 LAD |
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); | |
ccf74f23 LAD |
1359 | |
1360 | if (copy_from_sockptr(&qos, optval, len)) { | |
1361 | err = -EFAULT; | |
1362 | break; | |
1363 | } | |
1364 | ||
0fe8c8d0 | 1365 | if (len == sizeof(qos.ucast) && !check_ucast_qos(&qos)) { |
ccf74f23 LAD |
1366 | err = -EINVAL; |
1367 | break; | |
1368 | } | |
1369 | ||
1370 | iso_pi(sk)->qos = qos; | |
0fe8c8d0 | 1371 | iso_pi(sk)->qos_user_set = true; |
ccf74f23 LAD |
1372 | |
1373 | break; | |
1374 | ||
f764a6c2 LAD |
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 | ||
ccf74f23 LAD |
1398 | default: |
1399 | err = -ENOPROTOOPT; | |
1400 | break; | |
1401 | } | |
1402 | ||
1403 | release_sock(sk); | |
1404 | return err; | |
1405 | } | |
1406 | ||
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; | |
0eee4995 | 1412 | struct bt_iso_qos *qos; |
f764a6c2 LAD |
1413 | u8 base_len; |
1414 | u8 *base; | |
ccf74f23 LAD |
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: | |
9dfe1727 | 1425 | if (sk->sk_state == BT_CONNECTED) { |
ccf74f23 LAD |
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 | ||
0731c5ab LAD |
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 | ||
ccf74f23 | 1442 | case BT_ISO_QOS: |
1d1ab5d3 | 1443 | qos = iso_sock_get_qos(sk); |
ccf74f23 | 1444 | |
0eee4995 LAD |
1445 | len = min_t(unsigned int, len, sizeof(*qos)); |
1446 | if (copy_to_user(optval, qos, len)) | |
ccf74f23 LAD |
1447 | err = -EFAULT; |
1448 | ||
1449 | break; | |
1450 | ||
f764a6c2 | 1451 | case BT_ISO_BASE: |
9c082631 CD |
1452 | if (sk->sk_state == BT_CONNECTED && |
1453 | !bacmp(&iso_pi(sk)->dst, BDADDR_ANY)) { | |
f764a6c2 LAD |
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 | ||
ccf74f23 LAD |
1467 | default: |
1468 | err = -ENOPROTOOPT; | |
1469 | break; | |
1470 | } | |
1471 | ||
1472 | release_sock(sk); | |
1473 | return err; | |
1474 | } | |
1475 | ||
1476 | static int iso_sock_shutdown(struct socket *sock, int how) | |
1477 | { | |
1478 | struct sock *sk = sock->sk; | |
1479 | int err = 0; | |
1480 | ||
c5729093 | 1481 | BT_DBG("sock %p, sk %p, how %d", sock, sk, how); |
ccf74f23 LAD |
1482 | |
1483 | if (!sk) | |
1484 | return 0; | |
1485 | ||
1486 | sock_hold(sk); | |
1487 | lock_sock(sk); | |
1488 | ||
c5729093 LAD |
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; | |
ccf74f23 LAD |
1505 | } |
1506 | ||
c5729093 LAD |
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: | |
ccf74f23 LAD |
1515 | release_sock(sk); |
1516 | sock_put(sk); | |
1517 | ||
1518 | return err; | |
1519 | } | |
1520 | ||
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 | ||
bc1fb82a | 1533 | if (sock_flag(sk, SOCK_LINGER) && READ_ONCE(sk->sk_lingertime) && |
ccf74f23 LAD |
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 | ||
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 | ||
f764a6c2 LAD |
1564 | static bool iso_match_big(struct sock *sk, void *data) |
1565 | { | |
1566 | struct hci_evt_le_big_sync_estabilished *ev = data; | |
1567 | ||
0fe8c8d0 | 1568 | return ev->handle == iso_pi(sk)->qos.bcast.big; |
f764a6c2 LAD |
1569 | } |
1570 | ||
fbdc4bc4 IT |
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 | ||
ccf74f23 LAD |
1576 | static void iso_conn_ready(struct iso_conn *conn) |
1577 | { | |
fbdc4bc4 | 1578 | struct sock *parent = NULL; |
ccf74f23 | 1579 | struct sock *sk = conn->sk; |
fbdc4bc4 IT |
1580 | struct hci_ev_le_big_sync_estabilished *ev = NULL; |
1581 | struct hci_ev_le_pa_sync_established *ev2 = NULL; | |
6a5ad251 | 1582 | struct hci_conn *hcon; |
ccf74f23 LAD |
1583 | |
1584 | BT_DBG("conn %p", conn); | |
1585 | ||
1586 | if (sk) { | |
1587 | iso_sock_ready(conn->sk); | |
1588 | } else { | |
6a5ad251 LAD |
1589 | hcon = conn->hcon; |
1590 | if (!hcon) | |
ccf74f23 | 1591 | return; |
ccf74f23 | 1592 | |
fbdc4bc4 IT |
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 */ | |
6a5ad251 LAD |
1599 | parent = iso_get_sock_listen(&hcon->src, |
1600 | &hcon->dst, | |
fbdc4bc4 IT |
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) | |
6a5ad251 | 1617 | parent = iso_get_sock_listen(&hcon->src, |
fbdc4bc4 | 1618 | BDADDR_ANY, NULL, NULL); |
f764a6c2 | 1619 | |
6a5ad251 | 1620 | if (!parent) |
ccf74f23 | 1621 | return; |
ccf74f23 LAD |
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); | |
ccf74f23 LAD |
1629 | return; |
1630 | } | |
1631 | ||
1632 | iso_sock_init(sk, parent); | |
1633 | ||
6a5ad251 | 1634 | bacpy(&iso_pi(sk)->src, &hcon->src); |
fbdc4bc4 IT |
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; | |
f764a6c2 LAD |
1641 | |
1642 | /* If hcon has no destination address (BDADDR_ANY) it means it | |
fbdc4bc4 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. | |
f764a6c2 | 1646 | */ |
6a5ad251 LAD |
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; | |
f764a6c2 LAD |
1651 | } |
1652 | ||
fbdc4bc4 IT |
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 | ||
6a5ad251 LAD |
1660 | bacpy(&iso_pi(sk)->dst, &hcon->dst); |
1661 | iso_pi(sk)->dst_type = hcon->dst_type; | |
9c082631 CD |
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; | |
ccf74f23 | 1665 | |
6a5ad251 LAD |
1666 | hci_conn_hold(hcon); |
1667 | iso_chan_add(conn, sk, parent); | |
ccf74f23 | 1668 | |
fbdc4bc4 IT |
1669 | if ((ev && ((struct hci_evt_le_big_sync_estabilished *)ev)->status) || |
1670 | (ev2 && ev2->status)) { | |
f777d882 IT |
1671 | /* Trigger error signal on child socket */ |
1672 | sk->sk_err = ECONNREFUSED; | |
1673 | sk->sk_error_report(sk); | |
1674 | } | |
1675 | ||
ccf74f23 LAD |
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); | |
ccf74f23 LAD |
1685 | } |
1686 | } | |
1687 | ||
f764a6c2 LAD |
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 | ||
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 | ||
9c082631 CD |
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 | ||
ccf74f23 | 1709 | /* ----- ISO interface with lower layer (HCI) ----- */ |
f764a6c2 | 1710 | |
ccf74f23 LAD |
1711 | int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags) |
1712 | { | |
f764a6c2 LAD |
1713 | struct hci_ev_le_pa_sync_established *ev1; |
1714 | struct hci_evt_le_big_info_adv_report *ev2; | |
9c082631 | 1715 | struct hci_ev_le_per_adv_report *ev3; |
ccf74f23 LAD |
1716 | struct sock *sk; |
1717 | int lm = 0; | |
1718 | ||
f764a6c2 LAD |
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. | |
9c082631 CD |
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. | |
f764a6c2 LAD |
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); | |
fbdc4bc4 | 1739 | if (sk && !ev1->status) |
f764a6c2 | 1740 | iso_pi(sk)->sync_handle = le16_to_cpu(ev1->handle); |
ccf74f23 | 1741 | |
f764a6c2 LAD |
1742 | goto done; |
1743 | } | |
ccf74f23 | 1744 | |
f764a6c2 LAD |
1745 | ev2 = hci_recv_event_data(hdev, HCI_EVT_LE_BIG_INFO_ADV_REPORT); |
1746 | if (ev2) { | |
fbdc4bc4 | 1747 | /* Try to get PA sync listening socket, if it exists */ |
f764a6c2 | 1748 | sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr, |
fbdc4bc4 IT |
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); | |
f764a6c2 LAD |
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 | ||
fbdc4bc4 IT |
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, | |
f777d882 IT |
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 | } | |
f764a6c2 | 1771 | } |
ccf74f23 | 1772 | } |
9c082631 CD |
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 | } | |
f764a6c2 LAD |
1784 | } else { |
1785 | sk = iso_get_sock_listen(&hdev->bdaddr, BDADDR_ANY, NULL, NULL); | |
ccf74f23 | 1786 | } |
f764a6c2 LAD |
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; | |
ccf74f23 LAD |
1796 | |
1797 | return lm; | |
1798 | } | |
1799 | ||
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) { | |
06149746 LAD |
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 | ||
ccf74f23 LAD |
1814 | return; |
1815 | } | |
1816 | ||
1817 | /* Create CIS if pending */ | |
7f74563e | 1818 | hci_le_create_cis_pending(hcon->hdev); |
ccf74f23 LAD |
1819 | return; |
1820 | } | |
1821 | ||
1822 | BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status); | |
1823 | ||
fbdc4bc4 IT |
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. | |
f777d882 | 1828 | */ |
fbdc4bc4 IT |
1829 | if (!status || test_bit(HCI_CONN_BIG_SYNC_FAILED, &hcon->flags) || |
1830 | test_bit(HCI_CONN_PA_SYNC_FAILED, &hcon->flags)) { | |
ccf74f23 LAD |
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 | ||
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 | ||
1851 | void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) | |
1852 | { | |
1853 | struct iso_conn *conn = hcon->iso_data; | |
ccf74f23 LAD |
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) { | |
2f10e40a PV |
1875 | struct hci_iso_ts_data_hdr *hdr; |
1876 | ||
ccf74f23 LAD |
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 | ||
2f10e40a | 1884 | len = __le16_to_cpu(hdr->slen); |
ccf74f23 | 1885 | } else { |
2f10e40a PV |
1886 | struct hci_iso_data_hdr *hdr; |
1887 | ||
ccf74f23 LAD |
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 | } | |
2f10e40a PV |
1893 | |
1894 | len = __le16_to_cpu(hdr->slen); | |
ccf74f23 LAD |
1895 | } |
1896 | ||
ccf74f23 LAD |
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 */ | |
0731c5ab | 1905 | hci_skb_pkt_status(skb) = flags & 0x03; |
ccf74f23 LAD |
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 | ||
0731c5ab | 1927 | hci_skb_pkt_status(conn->rx_skb) = flags & 0x03; |
ccf74f23 LAD |
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 | ||
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 | ||
2033 | bool iso_enabled(void) | |
2034 | { | |
2035 | return iso_inited; | |
2036 | } | |
2037 | ||
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 | ||
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 | } |