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Commit | Line | Data |
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8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth SCO sockets. */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/kernel.h> | |
1da177e4 LT |
32 | #include <linux/sched.h> |
33 | #include <linux/slab.h> | |
34 | #include <linux/poll.h> | |
35 | #include <linux/fcntl.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/socket.h> | |
39 | #include <linux/skbuff.h> | |
be9d1227 | 40 | #include <linux/device.h> |
aef7d97c MH |
41 | #include <linux/debugfs.h> |
42 | #include <linux/seq_file.h> | |
1da177e4 LT |
43 | #include <linux/list.h> |
44 | #include <net/sock.h> | |
45 | ||
46 | #include <asm/system.h> | |
47 | #include <asm/uaccess.h> | |
48 | ||
49 | #include <net/bluetooth/bluetooth.h> | |
50 | #include <net/bluetooth/hci_core.h> | |
51 | #include <net/bluetooth/sco.h> | |
52 | ||
7cb127d5 MH |
53 | #define VERSION "0.6" |
54 | ||
55 | static int disable_esco = 0; | |
1da177e4 | 56 | |
90ddc4f0 | 57 | static const struct proto_ops sco_sock_ops; |
1da177e4 LT |
58 | |
59 | static struct bt_sock_list sco_sk_list = { | |
d5fb2962 | 60 | .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock) |
1da177e4 LT |
61 | }; |
62 | ||
63 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent); | |
64 | static void sco_chan_del(struct sock *sk, int err); | |
65 | ||
66 | static int sco_conn_del(struct hci_conn *conn, int err); | |
67 | ||
68 | static void sco_sock_close(struct sock *sk); | |
69 | static void sco_sock_kill(struct sock *sk); | |
70 | ||
71 | /* ---- SCO timers ---- */ | |
72 | static void sco_sock_timeout(unsigned long arg) | |
73 | { | |
74 | struct sock *sk = (struct sock *) arg; | |
75 | ||
76 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
77 | ||
78 | bh_lock_sock(sk); | |
79 | sk->sk_err = ETIMEDOUT; | |
80 | sk->sk_state_change(sk); | |
81 | bh_unlock_sock(sk); | |
82 | ||
83 | sco_sock_kill(sk); | |
84 | sock_put(sk); | |
85 | } | |
86 | ||
87 | static void sco_sock_set_timer(struct sock *sk, long timeout) | |
88 | { | |
89 | BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
90 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
91 | } | |
92 | ||
93 | static void sco_sock_clear_timer(struct sock *sk) | |
94 | { | |
95 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
96 | sk_stop_timer(sk, &sk->sk_timer); | |
97 | } | |
98 | ||
1da177e4 LT |
99 | /* ---- SCO connections ---- */ |
100 | static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status) | |
101 | { | |
102 | struct hci_dev *hdev = hcon->hdev; | |
25ea6db0 | 103 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 | 104 | |
25ea6db0 | 105 | if (conn || status) |
1da177e4 LT |
106 | return conn; |
107 | ||
25ea6db0 MH |
108 | conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC); |
109 | if (!conn) | |
1da177e4 | 110 | return NULL; |
1da177e4 LT |
111 | |
112 | spin_lock_init(&conn->lock); | |
113 | ||
114 | hcon->sco_data = conn; | |
115 | conn->hcon = hcon; | |
116 | ||
117 | conn->src = &hdev->bdaddr; | |
118 | conn->dst = &hcon->dst; | |
119 | ||
120 | if (hdev->sco_mtu > 0) | |
121 | conn->mtu = hdev->sco_mtu; | |
122 | else | |
123 | conn->mtu = 60; | |
124 | ||
125 | BT_DBG("hcon %p conn %p", hcon, conn); | |
25ea6db0 | 126 | |
1da177e4 LT |
127 | return conn; |
128 | } | |
129 | ||
130 | static inline struct sock *sco_chan_get(struct sco_conn *conn) | |
131 | { | |
132 | struct sock *sk = NULL; | |
133 | sco_conn_lock(conn); | |
134 | sk = conn->sk; | |
135 | sco_conn_unlock(conn); | |
136 | return sk; | |
137 | } | |
138 | ||
139 | static int sco_conn_del(struct hci_conn *hcon, int err) | |
140 | { | |
141 | struct sco_conn *conn; | |
142 | struct sock *sk; | |
143 | ||
8e87d142 | 144 | if (!(conn = hcon->sco_data)) |
1da177e4 LT |
145 | return 0; |
146 | ||
147 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
148 | ||
149 | /* Kill socket */ | |
150 | if ((sk = sco_chan_get(conn))) { | |
151 | bh_lock_sock(sk); | |
152 | sco_sock_clear_timer(sk); | |
153 | sco_chan_del(sk, err); | |
154 | bh_unlock_sock(sk); | |
155 | sco_sock_kill(sk); | |
156 | } | |
157 | ||
158 | hcon->sco_data = NULL; | |
159 | kfree(conn); | |
160 | return 0; | |
161 | } | |
162 | ||
163 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
164 | { | |
165 | int err = 0; | |
166 | ||
167 | sco_conn_lock(conn); | |
168 | if (conn->sk) { | |
169 | err = -EBUSY; | |
170 | } else { | |
171 | __sco_chan_add(conn, sk, parent); | |
172 | } | |
173 | sco_conn_unlock(conn); | |
174 | return err; | |
175 | } | |
176 | ||
177 | static int sco_connect(struct sock *sk) | |
178 | { | |
179 | bdaddr_t *src = &bt_sk(sk)->src; | |
180 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
181 | struct sco_conn *conn; | |
182 | struct hci_conn *hcon; | |
183 | struct hci_dev *hdev; | |
b6a0dc82 | 184 | int err, type; |
1da177e4 LT |
185 | |
186 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
187 | ||
188 | if (!(hdev = hci_get_route(dst, src))) | |
189 | return -EHOSTUNREACH; | |
190 | ||
191 | hci_dev_lock_bh(hdev); | |
192 | ||
193 | err = -ENOMEM; | |
194 | ||
7cb127d5 MH |
195 | if (lmp_esco_capable(hdev) && !disable_esco) |
196 | type = ESCO_LINK; | |
197 | else | |
198 | type = SCO_LINK; | |
b6a0dc82 | 199 | |
8c1b2355 | 200 | hcon = hci_connect(hdev, type, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
1da177e4 LT |
201 | if (!hcon) |
202 | goto done; | |
203 | ||
204 | conn = sco_conn_add(hcon, 0); | |
205 | if (!conn) { | |
206 | hci_conn_put(hcon); | |
207 | goto done; | |
208 | } | |
209 | ||
210 | /* Update source addr of the socket */ | |
211 | bacpy(src, conn->src); | |
212 | ||
213 | err = sco_chan_add(conn, sk, NULL); | |
214 | if (err) | |
215 | goto done; | |
216 | ||
217 | if (hcon->state == BT_CONNECTED) { | |
218 | sco_sock_clear_timer(sk); | |
219 | sk->sk_state = BT_CONNECTED; | |
220 | } else { | |
221 | sk->sk_state = BT_CONNECT; | |
222 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
223 | } | |
b6a0dc82 | 224 | |
1da177e4 LT |
225 | done: |
226 | hci_dev_unlock_bh(hdev); | |
227 | hci_dev_put(hdev); | |
228 | return err; | |
229 | } | |
230 | ||
231 | static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) | |
232 | { | |
233 | struct sco_conn *conn = sco_pi(sk)->conn; | |
234 | struct sk_buff *skb; | |
235 | int err, count; | |
236 | ||
237 | /* Check outgoing MTU */ | |
238 | if (len > conn->mtu) | |
239 | return -EINVAL; | |
240 | ||
241 | BT_DBG("sk %p len %d", sk, len); | |
242 | ||
243 | count = min_t(unsigned int, conn->mtu, len); | |
244 | if (!(skb = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err))) | |
245 | return err; | |
246 | ||
247 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
248 | err = -EFAULT; | |
249 | goto fail; | |
250 | } | |
251 | ||
0d861d8b | 252 | hci_send_sco(conn->hcon, skb); |
1da177e4 LT |
253 | |
254 | return count; | |
255 | ||
256 | fail: | |
257 | kfree_skb(skb); | |
258 | return err; | |
259 | } | |
260 | ||
261 | static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) | |
262 | { | |
263 | struct sock *sk = sco_chan_get(conn); | |
264 | ||
265 | if (!sk) | |
266 | goto drop; | |
267 | ||
268 | BT_DBG("sk %p len %d", sk, skb->len); | |
269 | ||
270 | if (sk->sk_state != BT_CONNECTED) | |
271 | goto drop; | |
272 | ||
273 | if (!sock_queue_rcv_skb(sk, skb)) | |
274 | return; | |
275 | ||
276 | drop: | |
277 | kfree_skb(skb); | |
278 | return; | |
279 | } | |
280 | ||
281 | /* -------- Socket interface ---------- */ | |
282 | static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba) | |
283 | { | |
284 | struct sock *sk; | |
285 | struct hlist_node *node; | |
286 | ||
287 | sk_for_each(sk, node, &sco_sk_list.head) | |
288 | if (!bacmp(&bt_sk(sk)->src, ba)) | |
289 | goto found; | |
290 | sk = NULL; | |
291 | found: | |
292 | return sk; | |
293 | } | |
294 | ||
295 | /* Find socket listening on source bdaddr. | |
296 | * Returns closest match. | |
297 | */ | |
298 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
299 | { | |
300 | struct sock *sk = NULL, *sk1 = NULL; | |
301 | struct hlist_node *node; | |
302 | ||
303 | read_lock(&sco_sk_list.lock); | |
304 | ||
305 | sk_for_each(sk, node, &sco_sk_list.head) { | |
306 | if (sk->sk_state != BT_LISTEN) | |
307 | continue; | |
308 | ||
309 | /* Exact match. */ | |
310 | if (!bacmp(&bt_sk(sk)->src, src)) | |
311 | break; | |
312 | ||
313 | /* Closest match */ | |
314 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
315 | sk1 = sk; | |
316 | } | |
317 | ||
318 | read_unlock(&sco_sk_list.lock); | |
319 | ||
320 | return node ? sk : sk1; | |
321 | } | |
322 | ||
323 | static void sco_sock_destruct(struct sock *sk) | |
324 | { | |
325 | BT_DBG("sk %p", sk); | |
326 | ||
327 | skb_queue_purge(&sk->sk_receive_queue); | |
328 | skb_queue_purge(&sk->sk_write_queue); | |
329 | } | |
330 | ||
331 | static void sco_sock_cleanup_listen(struct sock *parent) | |
332 | { | |
333 | struct sock *sk; | |
334 | ||
335 | BT_DBG("parent %p", parent); | |
336 | ||
337 | /* Close not yet accepted channels */ | |
338 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
339 | sco_sock_close(sk); | |
340 | sco_sock_kill(sk); | |
341 | } | |
342 | ||
343 | parent->sk_state = BT_CLOSED; | |
344 | sock_set_flag(parent, SOCK_ZAPPED); | |
345 | } | |
346 | ||
347 | /* Kill socket (only if zapped and orphan) | |
348 | * Must be called on unlocked socket. | |
349 | */ | |
350 | static void sco_sock_kill(struct sock *sk) | |
351 | { | |
352 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
353 | return; | |
354 | ||
355 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
356 | ||
357 | /* Kill poor orphan */ | |
358 | bt_sock_unlink(&sco_sk_list, sk); | |
359 | sock_set_flag(sk, SOCK_DEAD); | |
360 | sock_put(sk); | |
361 | } | |
362 | ||
fd0b3ff7 | 363 | static void __sco_sock_close(struct sock *sk) |
1da177e4 | 364 | { |
fd0b3ff7 | 365 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
1da177e4 LT |
366 | |
367 | switch (sk->sk_state) { | |
368 | case BT_LISTEN: | |
369 | sco_sock_cleanup_listen(sk); | |
370 | break; | |
371 | ||
372 | case BT_CONNECTED: | |
373 | case BT_CONFIG: | |
374 | case BT_CONNECT: | |
375 | case BT_DISCONN: | |
376 | sco_chan_del(sk, ECONNRESET); | |
377 | break; | |
378 | ||
379 | default: | |
380 | sock_set_flag(sk, SOCK_ZAPPED); | |
381 | break; | |
3ff50b79 | 382 | } |
fd0b3ff7 | 383 | } |
1da177e4 | 384 | |
fd0b3ff7 MH |
385 | /* Must be called on unlocked socket. */ |
386 | static void sco_sock_close(struct sock *sk) | |
387 | { | |
388 | sco_sock_clear_timer(sk); | |
389 | lock_sock(sk); | |
390 | __sco_sock_close(sk); | |
1da177e4 | 391 | release_sock(sk); |
1da177e4 LT |
392 | sco_sock_kill(sk); |
393 | } | |
394 | ||
395 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
396 | { | |
397 | BT_DBG("sk %p", sk); | |
398 | ||
8e87d142 | 399 | if (parent) |
1da177e4 LT |
400 | sk->sk_type = parent->sk_type; |
401 | } | |
402 | ||
403 | static struct proto sco_proto = { | |
404 | .name = "SCO", | |
405 | .owner = THIS_MODULE, | |
406 | .obj_size = sizeof(struct sco_pinfo) | |
407 | }; | |
408 | ||
1b8d7ae4 | 409 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
410 | { |
411 | struct sock *sk; | |
412 | ||
6257ff21 | 413 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
414 | if (!sk) |
415 | return NULL; | |
416 | ||
417 | sock_init_data(sock, sk); | |
418 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
419 | ||
420 | sk->sk_destruct = sco_sock_destruct; | |
421 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
422 | ||
423 | sock_reset_flag(sk, SOCK_ZAPPED); | |
424 | ||
425 | sk->sk_protocol = proto; | |
426 | sk->sk_state = BT_OPEN; | |
427 | ||
b24b8a24 | 428 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
429 | |
430 | bt_sock_link(&sco_sk_list, sk); | |
431 | return sk; | |
432 | } | |
433 | ||
3f378b68 EP |
434 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol, |
435 | int kern) | |
1da177e4 LT |
436 | { |
437 | struct sock *sk; | |
438 | ||
439 | BT_DBG("sock %p", sock); | |
440 | ||
441 | sock->state = SS_UNCONNECTED; | |
442 | ||
443 | if (sock->type != SOCK_SEQPACKET) | |
444 | return -ESOCKTNOSUPPORT; | |
445 | ||
446 | sock->ops = &sco_sock_ops; | |
447 | ||
1b8d7ae4 | 448 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 449 | if (!sk) |
1da177e4 LT |
450 | return -ENOMEM; |
451 | ||
452 | sco_sock_init(sk, NULL); | |
453 | return 0; | |
454 | } | |
455 | ||
456 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
457 | { | |
458 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
459 | struct sock *sk = sock->sk; | |
460 | bdaddr_t *src = &sa->sco_bdaddr; | |
461 | int err = 0; | |
462 | ||
463 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
464 | ||
465 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
466 | return -EINVAL; | |
467 | ||
468 | lock_sock(sk); | |
469 | ||
470 | if (sk->sk_state != BT_OPEN) { | |
471 | err = -EBADFD; | |
472 | goto done; | |
473 | } | |
474 | ||
475 | write_lock_bh(&sco_sk_list.lock); | |
476 | ||
477 | if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) { | |
478 | err = -EADDRINUSE; | |
479 | } else { | |
480 | /* Save source address */ | |
481 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); | |
482 | sk->sk_state = BT_BOUND; | |
483 | } | |
484 | ||
485 | write_unlock_bh(&sco_sk_list.lock); | |
486 | ||
487 | done: | |
488 | release_sock(sk); | |
489 | return err; | |
490 | } | |
491 | ||
492 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
493 | { | |
494 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
495 | struct sock *sk = sock->sk; | |
496 | int err = 0; | |
497 | ||
498 | ||
499 | BT_DBG("sk %p", sk); | |
500 | ||
6503d961 CG |
501 | if (alen < sizeof(struct sockaddr_sco) || |
502 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
503 | return -EINVAL; |
504 | ||
505 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
506 | return -EBADFD; | |
507 | ||
508 | if (sk->sk_type != SOCK_SEQPACKET) | |
509 | return -EINVAL; | |
510 | ||
511 | lock_sock(sk); | |
512 | ||
513 | /* Set destination address and psm */ | |
514 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
515 | ||
516 | if ((err = sco_connect(sk))) | |
517 | goto done; | |
518 | ||
8e87d142 | 519 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
1da177e4 LT |
520 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
521 | ||
522 | done: | |
523 | release_sock(sk); | |
524 | return err; | |
525 | } | |
526 | ||
527 | static int sco_sock_listen(struct socket *sock, int backlog) | |
528 | { | |
529 | struct sock *sk = sock->sk; | |
530 | int err = 0; | |
531 | ||
532 | BT_DBG("sk %p backlog %d", sk, backlog); | |
533 | ||
534 | lock_sock(sk); | |
535 | ||
536 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
537 | err = -EBADFD; | |
538 | goto done; | |
539 | } | |
540 | ||
541 | sk->sk_max_ack_backlog = backlog; | |
542 | sk->sk_ack_backlog = 0; | |
543 | sk->sk_state = BT_LISTEN; | |
544 | ||
545 | done: | |
546 | release_sock(sk); | |
547 | return err; | |
548 | } | |
549 | ||
550 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
551 | { | |
552 | DECLARE_WAITQUEUE(wait, current); | |
553 | struct sock *sk = sock->sk, *ch; | |
554 | long timeo; | |
555 | int err = 0; | |
556 | ||
557 | lock_sock(sk); | |
558 | ||
559 | if (sk->sk_state != BT_LISTEN) { | |
560 | err = -EBADFD; | |
561 | goto done; | |
562 | } | |
563 | ||
564 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
565 | ||
566 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
567 | ||
568 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 569 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
1da177e4 LT |
570 | while (!(ch = bt_accept_dequeue(sk, newsock))) { |
571 | set_current_state(TASK_INTERRUPTIBLE); | |
572 | if (!timeo) { | |
573 | err = -EAGAIN; | |
574 | break; | |
575 | } | |
576 | ||
577 | release_sock(sk); | |
578 | timeo = schedule_timeout(timeo); | |
579 | lock_sock(sk); | |
580 | ||
581 | if (sk->sk_state != BT_LISTEN) { | |
582 | err = -EBADFD; | |
583 | break; | |
584 | } | |
585 | ||
586 | if (signal_pending(current)) { | |
587 | err = sock_intr_errno(timeo); | |
588 | break; | |
589 | } | |
590 | } | |
591 | set_current_state(TASK_RUNNING); | |
aa395145 | 592 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
593 | |
594 | if (err) | |
595 | goto done; | |
596 | ||
597 | newsock->state = SS_CONNECTED; | |
598 | ||
599 | BT_DBG("new socket %p", ch); | |
600 | ||
601 | done: | |
602 | release_sock(sk); | |
603 | return err; | |
604 | } | |
605 | ||
606 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
607 | { | |
608 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
609 | struct sock *sk = sock->sk; | |
610 | ||
611 | BT_DBG("sock %p, sk %p", sock, sk); | |
612 | ||
613 | addr->sa_family = AF_BLUETOOTH; | |
614 | *len = sizeof(struct sockaddr_sco); | |
615 | ||
616 | if (peer) | |
617 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
618 | else | |
619 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
8e87d142 | 624 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
625 | struct msghdr *msg, size_t len) |
626 | { | |
627 | struct sock *sk = sock->sk; | |
628 | int err = 0; | |
629 | ||
630 | BT_DBG("sock %p, sk %p", sock, sk); | |
631 | ||
c1cbe4b7 BL |
632 | err = sock_error(sk); |
633 | if (err) | |
634 | return err; | |
1da177e4 LT |
635 | |
636 | if (msg->msg_flags & MSG_OOB) | |
637 | return -EOPNOTSUPP; | |
638 | ||
639 | lock_sock(sk); | |
640 | ||
641 | if (sk->sk_state == BT_CONNECTED) | |
642 | err = sco_send_frame(sk, msg, len); | |
643 | else | |
644 | err = -ENOTCONN; | |
645 | ||
646 | release_sock(sk); | |
647 | return err; | |
648 | } | |
649 | ||
b7058842 | 650 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
651 | { |
652 | struct sock *sk = sock->sk; | |
653 | int err = 0; | |
654 | ||
655 | BT_DBG("sk %p", sk); | |
656 | ||
657 | lock_sock(sk); | |
658 | ||
659 | switch (optname) { | |
660 | default: | |
661 | err = -ENOPROTOOPT; | |
662 | break; | |
663 | } | |
664 | ||
665 | release_sock(sk); | |
666 | return err; | |
667 | } | |
668 | ||
d58daf42 | 669 | static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
670 | { |
671 | struct sock *sk = sock->sk; | |
672 | struct sco_options opts; | |
673 | struct sco_conninfo cinfo; | |
8e87d142 | 674 | int len, err = 0; |
1da177e4 LT |
675 | |
676 | BT_DBG("sk %p", sk); | |
677 | ||
678 | if (get_user(len, optlen)) | |
679 | return -EFAULT; | |
680 | ||
681 | lock_sock(sk); | |
682 | ||
683 | switch (optname) { | |
684 | case SCO_OPTIONS: | |
685 | if (sk->sk_state != BT_CONNECTED) { | |
686 | err = -ENOTCONN; | |
687 | break; | |
688 | } | |
689 | ||
690 | opts.mtu = sco_pi(sk)->conn->mtu; | |
691 | ||
692 | BT_DBG("mtu %d", opts.mtu); | |
693 | ||
694 | len = min_t(unsigned int, len, sizeof(opts)); | |
695 | if (copy_to_user(optval, (char *)&opts, len)) | |
696 | err = -EFAULT; | |
697 | ||
698 | break; | |
699 | ||
700 | case SCO_CONNINFO: | |
701 | if (sk->sk_state != BT_CONNECTED) { | |
702 | err = -ENOTCONN; | |
703 | break; | |
704 | } | |
705 | ||
706 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; | |
707 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
708 | ||
709 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
710 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
711 | err = -EFAULT; | |
712 | ||
713 | break; | |
714 | ||
715 | default: | |
716 | err = -ENOPROTOOPT; | |
717 | break; | |
718 | } | |
719 | ||
720 | release_sock(sk); | |
721 | return err; | |
722 | } | |
723 | ||
d58daf42 MH |
724 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
725 | { | |
726 | struct sock *sk = sock->sk; | |
727 | int len, err = 0; | |
728 | ||
729 | BT_DBG("sk %p", sk); | |
730 | ||
731 | if (level == SOL_SCO) | |
732 | return sco_sock_getsockopt_old(sock, optname, optval, optlen); | |
733 | ||
734 | if (get_user(len, optlen)) | |
735 | return -EFAULT; | |
736 | ||
737 | lock_sock(sk); | |
738 | ||
739 | switch (optname) { | |
740 | default: | |
741 | err = -ENOPROTOOPT; | |
742 | break; | |
743 | } | |
744 | ||
745 | release_sock(sk); | |
746 | return err; | |
747 | } | |
748 | ||
fd0b3ff7 MH |
749 | static int sco_sock_shutdown(struct socket *sock, int how) |
750 | { | |
751 | struct sock *sk = sock->sk; | |
752 | int err = 0; | |
753 | ||
754 | BT_DBG("sock %p, sk %p", sock, sk); | |
755 | ||
756 | if (!sk) | |
757 | return 0; | |
758 | ||
759 | lock_sock(sk); | |
760 | if (!sk->sk_shutdown) { | |
761 | sk->sk_shutdown = SHUTDOWN_MASK; | |
762 | sco_sock_clear_timer(sk); | |
763 | __sco_sock_close(sk); | |
764 | ||
765 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
766 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
767 | sk->sk_lingertime); | |
768 | } | |
769 | release_sock(sk); | |
770 | return err; | |
771 | } | |
772 | ||
1da177e4 LT |
773 | static int sco_sock_release(struct socket *sock) |
774 | { | |
775 | struct sock *sk = sock->sk; | |
776 | int err = 0; | |
777 | ||
778 | BT_DBG("sock %p, sk %p", sock, sk); | |
779 | ||
780 | if (!sk) | |
781 | return 0; | |
782 | ||
783 | sco_sock_close(sk); | |
784 | ||
785 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
786 | lock_sock(sk); | |
787 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
788 | release_sock(sk); | |
789 | } | |
790 | ||
791 | sock_orphan(sk); | |
792 | sco_sock_kill(sk); | |
793 | return err; | |
794 | } | |
795 | ||
796 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
797 | { | |
798 | BT_DBG("conn %p", conn); | |
799 | ||
800 | sco_pi(sk)->conn = conn; | |
801 | conn->sk = sk; | |
802 | ||
803 | if (parent) | |
804 | bt_accept_enqueue(parent, sk); | |
805 | } | |
806 | ||
8e87d142 | 807 | /* Delete channel. |
1da177e4 LT |
808 | * Must be called on the locked socket. */ |
809 | static void sco_chan_del(struct sock *sk, int err) | |
810 | { | |
811 | struct sco_conn *conn; | |
812 | ||
813 | conn = sco_pi(sk)->conn; | |
814 | ||
815 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
816 | ||
8e87d142 | 817 | if (conn) { |
1da177e4 LT |
818 | sco_conn_lock(conn); |
819 | conn->sk = NULL; | |
820 | sco_pi(sk)->conn = NULL; | |
821 | sco_conn_unlock(conn); | |
822 | hci_conn_put(conn->hcon); | |
823 | } | |
824 | ||
825 | sk->sk_state = BT_CLOSED; | |
826 | sk->sk_err = err; | |
827 | sk->sk_state_change(sk); | |
828 | ||
829 | sock_set_flag(sk, SOCK_ZAPPED); | |
830 | } | |
831 | ||
832 | static void sco_conn_ready(struct sco_conn *conn) | |
833 | { | |
834 | struct sock *parent, *sk; | |
835 | ||
836 | BT_DBG("conn %p", conn); | |
837 | ||
838 | sco_conn_lock(conn); | |
839 | ||
840 | if ((sk = conn->sk)) { | |
841 | sco_sock_clear_timer(sk); | |
842 | bh_lock_sock(sk); | |
843 | sk->sk_state = BT_CONNECTED; | |
844 | sk->sk_state_change(sk); | |
845 | bh_unlock_sock(sk); | |
846 | } else { | |
847 | parent = sco_get_sock_listen(conn->src); | |
848 | if (!parent) | |
849 | goto done; | |
850 | ||
851 | bh_lock_sock(parent); | |
852 | ||
3b1e0a65 | 853 | sk = sco_sock_alloc(sock_net(parent), NULL, BTPROTO_SCO, GFP_ATOMIC); |
1da177e4 LT |
854 | if (!sk) { |
855 | bh_unlock_sock(parent); | |
856 | goto done; | |
857 | } | |
858 | ||
859 | sco_sock_init(sk, parent); | |
860 | ||
861 | bacpy(&bt_sk(sk)->src, conn->src); | |
862 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
863 | ||
864 | hci_conn_hold(conn->hcon); | |
865 | __sco_chan_add(conn, sk, parent); | |
866 | ||
867 | sk->sk_state = BT_CONNECTED; | |
868 | ||
869 | /* Wake up parent */ | |
870 | parent->sk_data_ready(parent, 1); | |
871 | ||
872 | bh_unlock_sock(parent); | |
873 | } | |
874 | ||
875 | done: | |
876 | sco_conn_unlock(conn); | |
877 | } | |
878 | ||
879 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
880 | static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type) | |
881 | { | |
71aeeaa1 MH |
882 | register struct sock *sk; |
883 | struct hlist_node *node; | |
884 | int lm = 0; | |
885 | ||
886 | if (type != SCO_LINK && type != ESCO_LINK) | |
887 | return 0; | |
888 | ||
1da177e4 LT |
889 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
890 | ||
71aeeaa1 MH |
891 | /* Find listening sockets */ |
892 | read_lock(&sco_sk_list.lock); | |
893 | sk_for_each(sk, node, &sco_sk_list.head) { | |
894 | if (sk->sk_state != BT_LISTEN) | |
895 | continue; | |
896 | ||
897 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || | |
898 | !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { | |
899 | lm |= HCI_LM_ACCEPT; | |
900 | break; | |
901 | } | |
902 | } | |
903 | read_unlock(&sco_sk_list.lock); | |
904 | ||
905 | return lm; | |
1da177e4 LT |
906 | } |
907 | ||
908 | static int sco_connect_cfm(struct hci_conn *hcon, __u8 status) | |
909 | { | |
910 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
911 | ||
b6a0dc82 | 912 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
1da177e4 LT |
913 | return 0; |
914 | ||
915 | if (!status) { | |
916 | struct sco_conn *conn; | |
917 | ||
918 | conn = sco_conn_add(hcon, status); | |
919 | if (conn) | |
920 | sco_conn_ready(conn); | |
8e87d142 | 921 | } else |
1da177e4 LT |
922 | sco_conn_del(hcon, bt_err(status)); |
923 | ||
924 | return 0; | |
925 | } | |
926 | ||
2950f21a | 927 | static int sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
1da177e4 LT |
928 | { |
929 | BT_DBG("hcon %p reason %d", hcon, reason); | |
930 | ||
b6a0dc82 | 931 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
1da177e4 LT |
932 | return 0; |
933 | ||
934 | sco_conn_del(hcon, bt_err(reason)); | |
b6a0dc82 | 935 | |
1da177e4 LT |
936 | return 0; |
937 | } | |
938 | ||
939 | static int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) | |
940 | { | |
941 | struct sco_conn *conn = hcon->sco_data; | |
942 | ||
943 | if (!conn) | |
944 | goto drop; | |
945 | ||
946 | BT_DBG("conn %p len %d", conn, skb->len); | |
947 | ||
948 | if (skb->len) { | |
949 | sco_recv_frame(conn, skb); | |
950 | return 0; | |
951 | } | |
952 | ||
953 | drop: | |
8e87d142 | 954 | kfree_skb(skb); |
1da177e4 LT |
955 | return 0; |
956 | } | |
957 | ||
aef7d97c | 958 | static int sco_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
959 | { |
960 | struct sock *sk; | |
961 | struct hlist_node *node; | |
1da177e4 LT |
962 | |
963 | read_lock_bh(&sco_sk_list.lock); | |
964 | ||
be9d1227 | 965 | sk_for_each(sk, node, &sco_sk_list.head) { |
aef7d97c MH |
966 | seq_printf(f, "%s %s %d\n", batostr(&bt_sk(sk)->src), |
967 | batostr(&bt_sk(sk)->dst), sk->sk_state); | |
be9d1227 | 968 | } |
1da177e4 | 969 | |
1da177e4 | 970 | read_unlock_bh(&sco_sk_list.lock); |
1da177e4 | 971 | |
aef7d97c | 972 | return 0; |
1da177e4 LT |
973 | } |
974 | ||
aef7d97c MH |
975 | static int sco_debugfs_open(struct inode *inode, struct file *file) |
976 | { | |
977 | return single_open(file, sco_debugfs_show, inode->i_private); | |
978 | } | |
979 | ||
980 | static const struct file_operations sco_debugfs_fops = { | |
981 | .open = sco_debugfs_open, | |
982 | .read = seq_read, | |
983 | .llseek = seq_lseek, | |
984 | .release = single_release, | |
985 | }; | |
986 | ||
987 | static struct dentry *sco_debugfs; | |
1da177e4 | 988 | |
90ddc4f0 | 989 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
990 | .family = PF_BLUETOOTH, |
991 | .owner = THIS_MODULE, | |
992 | .release = sco_sock_release, | |
993 | .bind = sco_sock_bind, | |
994 | .connect = sco_sock_connect, | |
995 | .listen = sco_sock_listen, | |
996 | .accept = sco_sock_accept, | |
997 | .getname = sco_sock_getname, | |
998 | .sendmsg = sco_sock_sendmsg, | |
999 | .recvmsg = bt_sock_recvmsg, | |
1000 | .poll = bt_sock_poll, | |
3241ad82 | 1001 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
1002 | .mmap = sock_no_mmap, |
1003 | .socketpair = sock_no_socketpair, | |
fd0b3ff7 | 1004 | .shutdown = sco_sock_shutdown, |
1da177e4 LT |
1005 | .setsockopt = sco_sock_setsockopt, |
1006 | .getsockopt = sco_sock_getsockopt | |
1007 | }; | |
1008 | ||
ec1b4cf7 | 1009 | static const struct net_proto_family sco_sock_family_ops = { |
1da177e4 LT |
1010 | .family = PF_BLUETOOTH, |
1011 | .owner = THIS_MODULE, | |
1012 | .create = sco_sock_create, | |
1013 | }; | |
1014 | ||
1015 | static struct hci_proto sco_hci_proto = { | |
1016 | .name = "SCO", | |
1017 | .id = HCI_PROTO_SCO, | |
1018 | .connect_ind = sco_connect_ind, | |
1019 | .connect_cfm = sco_connect_cfm, | |
2950f21a | 1020 | .disconn_cfm = sco_disconn_cfm, |
1da177e4 LT |
1021 | .recv_scodata = sco_recv_scodata |
1022 | }; | |
1023 | ||
1024 | static int __init sco_init(void) | |
1025 | { | |
1026 | int err; | |
1027 | ||
1028 | err = proto_register(&sco_proto, 0); | |
1029 | if (err < 0) | |
1030 | return err; | |
1031 | ||
1032 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1033 | if (err < 0) { | |
1034 | BT_ERR("SCO socket registration failed"); | |
1035 | goto error; | |
1036 | } | |
1037 | ||
1038 | err = hci_register_proto(&sco_hci_proto); | |
1039 | if (err < 0) { | |
1040 | BT_ERR("SCO protocol registration failed"); | |
1041 | bt_sock_unregister(BTPROTO_SCO); | |
1042 | goto error; | |
1043 | } | |
1044 | ||
aef7d97c MH |
1045 | if (bt_debugfs) { |
1046 | sco_debugfs = debugfs_create_file("sco", 0444, | |
1047 | bt_debugfs, NULL, &sco_debugfs_fops); | |
1048 | if (!sco_debugfs) | |
1049 | BT_ERR("Failed to create SCO debug file"); | |
1050 | } | |
1da177e4 LT |
1051 | |
1052 | BT_INFO("SCO (Voice Link) ver %s", VERSION); | |
1053 | BT_INFO("SCO socket layer initialized"); | |
1054 | ||
1055 | return 0; | |
1056 | ||
1057 | error: | |
1058 | proto_unregister(&sco_proto); | |
1059 | return err; | |
1060 | } | |
1061 | ||
1062 | static void __exit sco_exit(void) | |
1063 | { | |
aef7d97c | 1064 | debugfs_remove(sco_debugfs); |
1da177e4 LT |
1065 | |
1066 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1067 | BT_ERR("SCO socket unregistration failed"); | |
1068 | ||
1069 | if (hci_unregister_proto(&sco_hci_proto) < 0) | |
1070 | BT_ERR("SCO protocol unregistration failed"); | |
1071 | ||
1072 | proto_unregister(&sco_proto); | |
1073 | } | |
1074 | ||
1075 | module_init(sco_init); | |
1076 | module_exit(sco_exit); | |
1077 | ||
7cb127d5 MH |
1078 | module_param(disable_esco, bool, 0644); |
1079 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); | |
1080 | ||
63fbd24e | 1081 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
1082 | MODULE_DESCRIPTION("Bluetooth SCO ver " VERSION); |
1083 | MODULE_VERSION(VERSION); | |
1084 | MODULE_LICENSE("GPL"); | |
1085 | MODULE_ALIAS("bt-proto-2"); |