Commit | Line | Data |
---|---|---|
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> | |
735cbc47 | 47 | #include <linux/uaccess.h> |
1da177e4 LT |
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 | ||
735cbc47 | 55 | static int disable_esco; |
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 | { | |
735cbc47 | 141 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 LT |
142 | struct sock *sk; |
143 | ||
735cbc47 | 144 | if (!conn) |
1da177e4 LT |
145 | return 0; |
146 | ||
147 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
148 | ||
149 | /* Kill socket */ | |
735cbc47 AE |
150 | sk = sco_chan_get(conn); |
151 | if (sk) { | |
1da177e4 LT |
152 | bh_lock_sock(sk); |
153 | sco_sock_clear_timer(sk); | |
154 | sco_chan_del(sk, err); | |
155 | bh_unlock_sock(sk); | |
156 | sco_sock_kill(sk); | |
157 | } | |
158 | ||
159 | hcon->sco_data = NULL; | |
160 | kfree(conn); | |
161 | return 0; | |
162 | } | |
163 | ||
164 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
165 | { | |
166 | int err = 0; | |
167 | ||
168 | sco_conn_lock(conn); | |
b9dbdbc1 | 169 | if (conn->sk) |
1da177e4 | 170 | err = -EBUSY; |
b9dbdbc1 | 171 | else |
1da177e4 | 172 | __sco_chan_add(conn, sk, parent); |
b9dbdbc1 | 173 | |
1da177e4 LT |
174 | sco_conn_unlock(conn); |
175 | return err; | |
176 | } | |
177 | ||
178 | static int sco_connect(struct sock *sk) | |
179 | { | |
180 | bdaddr_t *src = &bt_sk(sk)->src; | |
181 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
182 | struct sco_conn *conn; | |
183 | struct hci_conn *hcon; | |
184 | struct hci_dev *hdev; | |
b6a0dc82 | 185 | int err, type; |
1da177e4 LT |
186 | |
187 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
188 | ||
735cbc47 AE |
189 | hdev = hci_get_route(dst, src); |
190 | if (!hdev) | |
1da177e4 LT |
191 | return -EHOSTUNREACH; |
192 | ||
193 | hci_dev_lock_bh(hdev); | |
194 | ||
195 | err = -ENOMEM; | |
196 | ||
7cb127d5 MH |
197 | if (lmp_esco_capable(hdev) && !disable_esco) |
198 | type = ESCO_LINK; | |
199 | else | |
200 | type = SCO_LINK; | |
b6a0dc82 | 201 | |
8c1b2355 | 202 | hcon = hci_connect(hdev, type, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
1da177e4 LT |
203 | if (!hcon) |
204 | goto done; | |
205 | ||
206 | conn = sco_conn_add(hcon, 0); | |
207 | if (!conn) { | |
208 | hci_conn_put(hcon); | |
209 | goto done; | |
210 | } | |
211 | ||
212 | /* Update source addr of the socket */ | |
213 | bacpy(src, conn->src); | |
214 | ||
215 | err = sco_chan_add(conn, sk, NULL); | |
216 | if (err) | |
217 | goto done; | |
218 | ||
219 | if (hcon->state == BT_CONNECTED) { | |
220 | sco_sock_clear_timer(sk); | |
221 | sk->sk_state = BT_CONNECTED; | |
222 | } else { | |
223 | sk->sk_state = BT_CONNECT; | |
224 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
225 | } | |
b6a0dc82 | 226 | |
1da177e4 LT |
227 | done: |
228 | hci_dev_unlock_bh(hdev); | |
229 | hci_dev_put(hdev); | |
230 | return err; | |
231 | } | |
232 | ||
233 | static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) | |
234 | { | |
235 | struct sco_conn *conn = sco_pi(sk)->conn; | |
236 | struct sk_buff *skb; | |
237 | int err, count; | |
238 | ||
239 | /* Check outgoing MTU */ | |
240 | if (len > conn->mtu) | |
241 | return -EINVAL; | |
242 | ||
243 | BT_DBG("sk %p len %d", sk, len); | |
244 | ||
245 | count = min_t(unsigned int, conn->mtu, len); | |
b9dbdbc1 GP |
246 | skb = bt_skb_send_alloc(sk, count, |
247 | msg->msg_flags & MSG_DONTWAIT, &err); | |
248 | if (!skb) | |
1da177e4 LT |
249 | return err; |
250 | ||
251 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
b9dbdbc1 GP |
252 | kfree_skb(skb); |
253 | return -EFAULT; | |
1da177e4 LT |
254 | } |
255 | ||
0d861d8b | 256 | hci_send_sco(conn->hcon, skb); |
1da177e4 LT |
257 | |
258 | return count; | |
1da177e4 LT |
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); | |
1da177e4 LT |
278 | } |
279 | ||
280 | /* -------- Socket interface ---------- */ | |
281 | static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba) | |
282 | { | |
283 | struct sock *sk; | |
284 | struct hlist_node *node; | |
285 | ||
286 | sk_for_each(sk, node, &sco_sk_list.head) | |
287 | if (!bacmp(&bt_sk(sk)->src, ba)) | |
288 | goto found; | |
289 | sk = NULL; | |
290 | found: | |
291 | return sk; | |
292 | } | |
293 | ||
294 | /* Find socket listening on source bdaddr. | |
295 | * Returns closest match. | |
296 | */ | |
297 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
298 | { | |
299 | struct sock *sk = NULL, *sk1 = NULL; | |
300 | struct hlist_node *node; | |
301 | ||
302 | read_lock(&sco_sk_list.lock); | |
303 | ||
304 | sk_for_each(sk, node, &sco_sk_list.head) { | |
305 | if (sk->sk_state != BT_LISTEN) | |
306 | continue; | |
307 | ||
308 | /* Exact match. */ | |
309 | if (!bacmp(&bt_sk(sk)->src, src)) | |
310 | break; | |
311 | ||
312 | /* Closest match */ | |
313 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
314 | sk1 = sk; | |
315 | } | |
316 | ||
317 | read_unlock(&sco_sk_list.lock); | |
318 | ||
319 | return node ? sk : sk1; | |
320 | } | |
321 | ||
322 | static void sco_sock_destruct(struct sock *sk) | |
323 | { | |
324 | BT_DBG("sk %p", sk); | |
325 | ||
326 | skb_queue_purge(&sk->sk_receive_queue); | |
327 | skb_queue_purge(&sk->sk_write_queue); | |
328 | } | |
329 | ||
330 | static void sco_sock_cleanup_listen(struct sock *parent) | |
331 | { | |
332 | struct sock *sk; | |
333 | ||
334 | BT_DBG("parent %p", parent); | |
335 | ||
336 | /* Close not yet accepted channels */ | |
337 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
338 | sco_sock_close(sk); | |
339 | sco_sock_kill(sk); | |
340 | } | |
341 | ||
342 | parent->sk_state = BT_CLOSED; | |
343 | sock_set_flag(parent, SOCK_ZAPPED); | |
344 | } | |
345 | ||
346 | /* Kill socket (only if zapped and orphan) | |
347 | * Must be called on unlocked socket. | |
348 | */ | |
349 | static void sco_sock_kill(struct sock *sk) | |
350 | { | |
351 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
352 | return; | |
353 | ||
354 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
355 | ||
356 | /* Kill poor orphan */ | |
357 | bt_sock_unlink(&sco_sk_list, sk); | |
358 | sock_set_flag(sk, SOCK_DEAD); | |
359 | sock_put(sk); | |
360 | } | |
361 | ||
fd0b3ff7 | 362 | static void __sco_sock_close(struct sock *sk) |
1da177e4 | 363 | { |
fd0b3ff7 | 364 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
1da177e4 LT |
365 | |
366 | switch (sk->sk_state) { | |
367 | case BT_LISTEN: | |
368 | sco_sock_cleanup_listen(sk); | |
369 | break; | |
370 | ||
371 | case BT_CONNECTED: | |
372 | case BT_CONFIG: | |
373 | case BT_CONNECT: | |
374 | case BT_DISCONN: | |
375 | sco_chan_del(sk, ECONNRESET); | |
376 | break; | |
377 | ||
378 | default: | |
379 | sock_set_flag(sk, SOCK_ZAPPED); | |
380 | break; | |
3ff50b79 | 381 | } |
fd0b3ff7 | 382 | } |
1da177e4 | 383 | |
fd0b3ff7 MH |
384 | /* Must be called on unlocked socket. */ |
385 | static void sco_sock_close(struct sock *sk) | |
386 | { | |
387 | sco_sock_clear_timer(sk); | |
388 | lock_sock(sk); | |
389 | __sco_sock_close(sk); | |
1da177e4 | 390 | release_sock(sk); |
1da177e4 LT |
391 | sco_sock_kill(sk); |
392 | } | |
393 | ||
394 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
395 | { | |
396 | BT_DBG("sk %p", sk); | |
397 | ||
8e87d142 | 398 | if (parent) |
1da177e4 LT |
399 | sk->sk_type = parent->sk_type; |
400 | } | |
401 | ||
402 | static struct proto sco_proto = { | |
403 | .name = "SCO", | |
404 | .owner = THIS_MODULE, | |
405 | .obj_size = sizeof(struct sco_pinfo) | |
406 | }; | |
407 | ||
1b8d7ae4 | 408 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
409 | { |
410 | struct sock *sk; | |
411 | ||
6257ff21 | 412 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
413 | if (!sk) |
414 | return NULL; | |
415 | ||
416 | sock_init_data(sock, sk); | |
417 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
418 | ||
419 | sk->sk_destruct = sco_sock_destruct; | |
420 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
421 | ||
422 | sock_reset_flag(sk, SOCK_ZAPPED); | |
423 | ||
424 | sk->sk_protocol = proto; | |
425 | sk->sk_state = BT_OPEN; | |
426 | ||
b24b8a24 | 427 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
428 | |
429 | bt_sock_link(&sco_sk_list, sk); | |
430 | return sk; | |
431 | } | |
432 | ||
3f378b68 EP |
433 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol, |
434 | int kern) | |
1da177e4 LT |
435 | { |
436 | struct sock *sk; | |
437 | ||
438 | BT_DBG("sock %p", sock); | |
439 | ||
440 | sock->state = SS_UNCONNECTED; | |
441 | ||
442 | if (sock->type != SOCK_SEQPACKET) | |
443 | return -ESOCKTNOSUPPORT; | |
444 | ||
445 | sock->ops = &sco_sock_ops; | |
446 | ||
1b8d7ae4 | 447 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 448 | if (!sk) |
1da177e4 LT |
449 | return -ENOMEM; |
450 | ||
451 | sco_sock_init(sk, NULL); | |
452 | return 0; | |
453 | } | |
454 | ||
455 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
456 | { | |
457 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
458 | struct sock *sk = sock->sk; | |
459 | bdaddr_t *src = &sa->sco_bdaddr; | |
460 | int err = 0; | |
461 | ||
462 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
463 | ||
464 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
465 | return -EINVAL; | |
466 | ||
467 | lock_sock(sk); | |
468 | ||
469 | if (sk->sk_state != BT_OPEN) { | |
470 | err = -EBADFD; | |
471 | goto done; | |
472 | } | |
473 | ||
474 | write_lock_bh(&sco_sk_list.lock); | |
475 | ||
476 | if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) { | |
477 | err = -EADDRINUSE; | |
478 | } else { | |
479 | /* Save source address */ | |
480 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); | |
481 | sk->sk_state = BT_BOUND; | |
482 | } | |
483 | ||
484 | write_unlock_bh(&sco_sk_list.lock); | |
485 | ||
486 | done: | |
487 | release_sock(sk); | |
488 | return err; | |
489 | } | |
490 | ||
491 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
492 | { | |
493 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
494 | struct sock *sk = sock->sk; | |
495 | int err = 0; | |
496 | ||
497 | ||
498 | BT_DBG("sk %p", sk); | |
499 | ||
6503d961 CG |
500 | if (alen < sizeof(struct sockaddr_sco) || |
501 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
502 | return -EINVAL; |
503 | ||
504 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
505 | return -EBADFD; | |
506 | ||
507 | if (sk->sk_type != SOCK_SEQPACKET) | |
508 | return -EINVAL; | |
509 | ||
510 | lock_sock(sk); | |
511 | ||
512 | /* Set destination address and psm */ | |
513 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
514 | ||
735cbc47 AE |
515 | err = sco_connect(sk); |
516 | if (err) | |
1da177e4 LT |
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; | |
b9dbdbc1 | 628 | int err; |
1da177e4 LT |
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 | { | |
735cbc47 AE |
834 | struct sock *parent; |
835 | struct sock *sk = conn->sk; | |
1da177e4 LT |
836 | |
837 | BT_DBG("conn %p", conn); | |
838 | ||
839 | sco_conn_lock(conn); | |
840 | ||
735cbc47 | 841 | if (sk) { |
1da177e4 LT |
842 | sco_sock_clear_timer(sk); |
843 | bh_lock_sock(sk); | |
844 | sk->sk_state = BT_CONNECTED; | |
845 | sk->sk_state_change(sk); | |
846 | bh_unlock_sock(sk); | |
847 | } else { | |
848 | parent = sco_get_sock_listen(conn->src); | |
849 | if (!parent) | |
850 | goto done; | |
851 | ||
852 | bh_lock_sock(parent); | |
853 | ||
b9dbdbc1 GP |
854 | sk = sco_sock_alloc(sock_net(parent), NULL, |
855 | BTPROTO_SCO, GFP_ATOMIC); | |
1da177e4 LT |
856 | if (!sk) { |
857 | bh_unlock_sock(parent); | |
858 | goto done; | |
859 | } | |
860 | ||
861 | sco_sock_init(sk, parent); | |
862 | ||
863 | bacpy(&bt_sk(sk)->src, conn->src); | |
864 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
865 | ||
866 | hci_conn_hold(conn->hcon); | |
867 | __sco_chan_add(conn, sk, parent); | |
868 | ||
869 | sk->sk_state = BT_CONNECTED; | |
870 | ||
871 | /* Wake up parent */ | |
872 | parent->sk_data_ready(parent, 1); | |
873 | ||
874 | bh_unlock_sock(parent); | |
875 | } | |
876 | ||
877 | done: | |
878 | sco_conn_unlock(conn); | |
879 | } | |
880 | ||
881 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
882 | static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type) | |
883 | { | |
71aeeaa1 MH |
884 | register struct sock *sk; |
885 | struct hlist_node *node; | |
886 | int lm = 0; | |
887 | ||
888 | if (type != SCO_LINK && type != ESCO_LINK) | |
c89ad737 | 889 | return -EINVAL; |
71aeeaa1 | 890 | |
1da177e4 LT |
891 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
892 | ||
71aeeaa1 MH |
893 | /* Find listening sockets */ |
894 | read_lock(&sco_sk_list.lock); | |
895 | sk_for_each(sk, node, &sco_sk_list.head) { | |
896 | if (sk->sk_state != BT_LISTEN) | |
897 | continue; | |
898 | ||
899 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || | |
900 | !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { | |
901 | lm |= HCI_LM_ACCEPT; | |
902 | break; | |
903 | } | |
904 | } | |
905 | read_unlock(&sco_sk_list.lock); | |
906 | ||
907 | return lm; | |
1da177e4 LT |
908 | } |
909 | ||
910 | static int sco_connect_cfm(struct hci_conn *hcon, __u8 status) | |
911 | { | |
912 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
913 | ||
b6a0dc82 | 914 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
c89ad737 | 915 | return -EINVAL; |
1da177e4 LT |
916 | |
917 | if (!status) { | |
918 | struct sco_conn *conn; | |
919 | ||
920 | conn = sco_conn_add(hcon, status); | |
921 | if (conn) | |
922 | sco_conn_ready(conn); | |
8e87d142 | 923 | } else |
1da177e4 LT |
924 | sco_conn_del(hcon, bt_err(status)); |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
2950f21a | 929 | static int sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
1da177e4 LT |
930 | { |
931 | BT_DBG("hcon %p reason %d", hcon, reason); | |
932 | ||
b6a0dc82 | 933 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
c89ad737 | 934 | return -EINVAL; |
1da177e4 LT |
935 | |
936 | sco_conn_del(hcon, bt_err(reason)); | |
b6a0dc82 | 937 | |
1da177e4 LT |
938 | return 0; |
939 | } | |
940 | ||
941 | static int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) | |
942 | { | |
943 | struct sco_conn *conn = hcon->sco_data; | |
944 | ||
945 | if (!conn) | |
946 | goto drop; | |
947 | ||
948 | BT_DBG("conn %p len %d", conn, skb->len); | |
949 | ||
950 | if (skb->len) { | |
951 | sco_recv_frame(conn, skb); | |
952 | return 0; | |
953 | } | |
954 | ||
955 | drop: | |
8e87d142 | 956 | kfree_skb(skb); |
1da177e4 LT |
957 | return 0; |
958 | } | |
959 | ||
aef7d97c | 960 | static int sco_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
961 | { |
962 | struct sock *sk; | |
963 | struct hlist_node *node; | |
1da177e4 LT |
964 | |
965 | read_lock_bh(&sco_sk_list.lock); | |
966 | ||
be9d1227 | 967 | sk_for_each(sk, node, &sco_sk_list.head) { |
aef7d97c MH |
968 | seq_printf(f, "%s %s %d\n", batostr(&bt_sk(sk)->src), |
969 | batostr(&bt_sk(sk)->dst), sk->sk_state); | |
be9d1227 | 970 | } |
1da177e4 | 971 | |
1da177e4 | 972 | read_unlock_bh(&sco_sk_list.lock); |
1da177e4 | 973 | |
aef7d97c | 974 | return 0; |
1da177e4 LT |
975 | } |
976 | ||
aef7d97c MH |
977 | static int sco_debugfs_open(struct inode *inode, struct file *file) |
978 | { | |
979 | return single_open(file, sco_debugfs_show, inode->i_private); | |
980 | } | |
981 | ||
982 | static const struct file_operations sco_debugfs_fops = { | |
983 | .open = sco_debugfs_open, | |
984 | .read = seq_read, | |
985 | .llseek = seq_lseek, | |
986 | .release = single_release, | |
987 | }; | |
988 | ||
989 | static struct dentry *sco_debugfs; | |
1da177e4 | 990 | |
90ddc4f0 | 991 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
992 | .family = PF_BLUETOOTH, |
993 | .owner = THIS_MODULE, | |
994 | .release = sco_sock_release, | |
995 | .bind = sco_sock_bind, | |
996 | .connect = sco_sock_connect, | |
997 | .listen = sco_sock_listen, | |
998 | .accept = sco_sock_accept, | |
999 | .getname = sco_sock_getname, | |
1000 | .sendmsg = sco_sock_sendmsg, | |
1001 | .recvmsg = bt_sock_recvmsg, | |
1002 | .poll = bt_sock_poll, | |
3241ad82 | 1003 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
1004 | .mmap = sock_no_mmap, |
1005 | .socketpair = sock_no_socketpair, | |
fd0b3ff7 | 1006 | .shutdown = sco_sock_shutdown, |
1da177e4 LT |
1007 | .setsockopt = sco_sock_setsockopt, |
1008 | .getsockopt = sco_sock_getsockopt | |
1009 | }; | |
1010 | ||
ec1b4cf7 | 1011 | static const struct net_proto_family sco_sock_family_ops = { |
1da177e4 LT |
1012 | .family = PF_BLUETOOTH, |
1013 | .owner = THIS_MODULE, | |
1014 | .create = sco_sock_create, | |
1015 | }; | |
1016 | ||
1017 | static struct hci_proto sco_hci_proto = { | |
1018 | .name = "SCO", | |
1019 | .id = HCI_PROTO_SCO, | |
1020 | .connect_ind = sco_connect_ind, | |
1021 | .connect_cfm = sco_connect_cfm, | |
2950f21a | 1022 | .disconn_cfm = sco_disconn_cfm, |
1da177e4 LT |
1023 | .recv_scodata = sco_recv_scodata |
1024 | }; | |
1025 | ||
1026 | static int __init sco_init(void) | |
1027 | { | |
1028 | int err; | |
1029 | ||
1030 | err = proto_register(&sco_proto, 0); | |
1031 | if (err < 0) | |
1032 | return err; | |
1033 | ||
1034 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1035 | if (err < 0) { | |
1036 | BT_ERR("SCO socket registration failed"); | |
1037 | goto error; | |
1038 | } | |
1039 | ||
1040 | err = hci_register_proto(&sco_hci_proto); | |
1041 | if (err < 0) { | |
1042 | BT_ERR("SCO protocol registration failed"); | |
1043 | bt_sock_unregister(BTPROTO_SCO); | |
1044 | goto error; | |
1045 | } | |
1046 | ||
aef7d97c MH |
1047 | if (bt_debugfs) { |
1048 | sco_debugfs = debugfs_create_file("sco", 0444, | |
1049 | bt_debugfs, NULL, &sco_debugfs_fops); | |
1050 | if (!sco_debugfs) | |
1051 | BT_ERR("Failed to create SCO debug file"); | |
1052 | } | |
1da177e4 LT |
1053 | |
1054 | BT_INFO("SCO (Voice Link) ver %s", VERSION); | |
1055 | BT_INFO("SCO socket layer initialized"); | |
1056 | ||
1057 | return 0; | |
1058 | ||
1059 | error: | |
1060 | proto_unregister(&sco_proto); | |
1061 | return err; | |
1062 | } | |
1063 | ||
1064 | static void __exit sco_exit(void) | |
1065 | { | |
aef7d97c | 1066 | debugfs_remove(sco_debugfs); |
1da177e4 LT |
1067 | |
1068 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1069 | BT_ERR("SCO socket unregistration failed"); | |
1070 | ||
1071 | if (hci_unregister_proto(&sco_hci_proto) < 0) | |
1072 | BT_ERR("SCO protocol unregistration failed"); | |
1073 | ||
1074 | proto_unregister(&sco_proto); | |
1075 | } | |
1076 | ||
1077 | module_init(sco_init); | |
1078 | module_exit(sco_exit); | |
1079 | ||
7cb127d5 MH |
1080 | module_param(disable_esco, bool, 0644); |
1081 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); | |
1082 | ||
63fbd24e | 1083 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
1084 | MODULE_DESCRIPTION("Bluetooth SCO ver " VERSION); |
1085 | MODULE_VERSION(VERSION); | |
1086 | MODULE_LICENSE("GPL"); | |
1087 | MODULE_ALIAS("bt-proto-2"); |