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> |
1da177e4 LT |
41 | #include <linux/list.h> |
42 | #include <net/sock.h> | |
43 | ||
44 | #include <asm/system.h> | |
45 | #include <asm/uaccess.h> | |
46 | ||
47 | #include <net/bluetooth/bluetooth.h> | |
48 | #include <net/bluetooth/hci_core.h> | |
49 | #include <net/bluetooth/sco.h> | |
50 | ||
7cb127d5 MH |
51 | #define VERSION "0.6" |
52 | ||
53 | static int disable_esco = 0; | |
1da177e4 | 54 | |
90ddc4f0 | 55 | static const struct proto_ops sco_sock_ops; |
1da177e4 LT |
56 | |
57 | static struct bt_sock_list sco_sk_list = { | |
d5fb2962 | 58 | .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock) |
1da177e4 LT |
59 | }; |
60 | ||
61 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent); | |
62 | static void sco_chan_del(struct sock *sk, int err); | |
63 | ||
64 | static int sco_conn_del(struct hci_conn *conn, int err); | |
65 | ||
66 | static void sco_sock_close(struct sock *sk); | |
67 | static void sco_sock_kill(struct sock *sk); | |
68 | ||
69 | /* ---- SCO timers ---- */ | |
70 | static void sco_sock_timeout(unsigned long arg) | |
71 | { | |
72 | struct sock *sk = (struct sock *) arg; | |
73 | ||
74 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
75 | ||
76 | bh_lock_sock(sk); | |
77 | sk->sk_err = ETIMEDOUT; | |
78 | sk->sk_state_change(sk); | |
79 | bh_unlock_sock(sk); | |
80 | ||
81 | sco_sock_kill(sk); | |
82 | sock_put(sk); | |
83 | } | |
84 | ||
85 | static void sco_sock_set_timer(struct sock *sk, long timeout) | |
86 | { | |
87 | BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
88 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
89 | } | |
90 | ||
91 | static void sco_sock_clear_timer(struct sock *sk) | |
92 | { | |
93 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
94 | sk_stop_timer(sk, &sk->sk_timer); | |
95 | } | |
96 | ||
1da177e4 LT |
97 | /* ---- SCO connections ---- */ |
98 | static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status) | |
99 | { | |
100 | struct hci_dev *hdev = hcon->hdev; | |
25ea6db0 | 101 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 | 102 | |
25ea6db0 | 103 | if (conn || status) |
1da177e4 LT |
104 | return conn; |
105 | ||
25ea6db0 MH |
106 | conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC); |
107 | if (!conn) | |
1da177e4 | 108 | return NULL; |
1da177e4 LT |
109 | |
110 | spin_lock_init(&conn->lock); | |
111 | ||
112 | hcon->sco_data = conn; | |
113 | conn->hcon = hcon; | |
114 | ||
115 | conn->src = &hdev->bdaddr; | |
116 | conn->dst = &hcon->dst; | |
117 | ||
118 | if (hdev->sco_mtu > 0) | |
119 | conn->mtu = hdev->sco_mtu; | |
120 | else | |
121 | conn->mtu = 60; | |
122 | ||
123 | BT_DBG("hcon %p conn %p", hcon, conn); | |
25ea6db0 | 124 | |
1da177e4 LT |
125 | return conn; |
126 | } | |
127 | ||
128 | static inline struct sock *sco_chan_get(struct sco_conn *conn) | |
129 | { | |
130 | struct sock *sk = NULL; | |
131 | sco_conn_lock(conn); | |
132 | sk = conn->sk; | |
133 | sco_conn_unlock(conn); | |
134 | return sk; | |
135 | } | |
136 | ||
137 | static int sco_conn_del(struct hci_conn *hcon, int err) | |
138 | { | |
139 | struct sco_conn *conn; | |
140 | struct sock *sk; | |
141 | ||
8e87d142 | 142 | if (!(conn = hcon->sco_data)) |
1da177e4 LT |
143 | return 0; |
144 | ||
145 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
146 | ||
147 | /* Kill socket */ | |
148 | if ((sk = sco_chan_get(conn))) { | |
149 | bh_lock_sock(sk); | |
150 | sco_sock_clear_timer(sk); | |
151 | sco_chan_del(sk, err); | |
152 | bh_unlock_sock(sk); | |
153 | sco_sock_kill(sk); | |
154 | } | |
155 | ||
156 | hcon->sco_data = NULL; | |
157 | kfree(conn); | |
158 | return 0; | |
159 | } | |
160 | ||
161 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
162 | { | |
163 | int err = 0; | |
164 | ||
165 | sco_conn_lock(conn); | |
166 | if (conn->sk) { | |
167 | err = -EBUSY; | |
168 | } else { | |
169 | __sco_chan_add(conn, sk, parent); | |
170 | } | |
171 | sco_conn_unlock(conn); | |
172 | return err; | |
173 | } | |
174 | ||
175 | static int sco_connect(struct sock *sk) | |
176 | { | |
177 | bdaddr_t *src = &bt_sk(sk)->src; | |
178 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
179 | struct sco_conn *conn; | |
180 | struct hci_conn *hcon; | |
181 | struct hci_dev *hdev; | |
b6a0dc82 | 182 | int err, type; |
1da177e4 LT |
183 | |
184 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
185 | ||
186 | if (!(hdev = hci_get_route(dst, src))) | |
187 | return -EHOSTUNREACH; | |
188 | ||
189 | hci_dev_lock_bh(hdev); | |
190 | ||
191 | err = -ENOMEM; | |
192 | ||
7cb127d5 MH |
193 | if (lmp_esco_capable(hdev) && !disable_esco) |
194 | type = ESCO_LINK; | |
195 | else | |
196 | type = SCO_LINK; | |
b6a0dc82 | 197 | |
8c1b2355 | 198 | hcon = hci_connect(hdev, type, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
1da177e4 LT |
199 | if (!hcon) |
200 | goto done; | |
201 | ||
202 | conn = sco_conn_add(hcon, 0); | |
203 | if (!conn) { | |
204 | hci_conn_put(hcon); | |
205 | goto done; | |
206 | } | |
207 | ||
208 | /* Update source addr of the socket */ | |
209 | bacpy(src, conn->src); | |
210 | ||
211 | err = sco_chan_add(conn, sk, NULL); | |
212 | if (err) | |
213 | goto done; | |
214 | ||
215 | if (hcon->state == BT_CONNECTED) { | |
216 | sco_sock_clear_timer(sk); | |
217 | sk->sk_state = BT_CONNECTED; | |
218 | } else { | |
219 | sk->sk_state = BT_CONNECT; | |
220 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
221 | } | |
b6a0dc82 | 222 | |
1da177e4 LT |
223 | done: |
224 | hci_dev_unlock_bh(hdev); | |
225 | hci_dev_put(hdev); | |
226 | return err; | |
227 | } | |
228 | ||
229 | static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) | |
230 | { | |
231 | struct sco_conn *conn = sco_pi(sk)->conn; | |
232 | struct sk_buff *skb; | |
233 | int err, count; | |
234 | ||
235 | /* Check outgoing MTU */ | |
236 | if (len > conn->mtu) | |
237 | return -EINVAL; | |
238 | ||
239 | BT_DBG("sk %p len %d", sk, len); | |
240 | ||
241 | count = min_t(unsigned int, conn->mtu, len); | |
242 | if (!(skb = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err))) | |
243 | return err; | |
244 | ||
245 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
246 | err = -EFAULT; | |
247 | goto fail; | |
248 | } | |
249 | ||
250 | if ((err = hci_send_sco(conn->hcon, skb)) < 0) | |
cdee5751 | 251 | return err; |
1da177e4 LT |
252 | |
253 | return count; | |
254 | ||
255 | fail: | |
256 | kfree_skb(skb); | |
257 | return err; | |
258 | } | |
259 | ||
260 | static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) | |
261 | { | |
262 | struct sock *sk = sco_chan_get(conn); | |
263 | ||
264 | if (!sk) | |
265 | goto drop; | |
266 | ||
267 | BT_DBG("sk %p len %d", sk, skb->len); | |
268 | ||
269 | if (sk->sk_state != BT_CONNECTED) | |
270 | goto drop; | |
271 | ||
272 | if (!sock_queue_rcv_skb(sk, skb)) | |
273 | return; | |
274 | ||
275 | drop: | |
276 | kfree_skb(skb); | |
277 | return; | |
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 | ||
500 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_sco)) | |
501 | return -EINVAL; | |
502 | ||
503 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
504 | return -EBADFD; | |
505 | ||
506 | if (sk->sk_type != SOCK_SEQPACKET) | |
507 | return -EINVAL; | |
508 | ||
509 | lock_sock(sk); | |
510 | ||
511 | /* Set destination address and psm */ | |
512 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
513 | ||
514 | if ((err = sco_connect(sk))) | |
515 | goto done; | |
516 | ||
8e87d142 | 517 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
1da177e4 LT |
518 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
519 | ||
520 | done: | |
521 | release_sock(sk); | |
522 | return err; | |
523 | } | |
524 | ||
525 | static int sco_sock_listen(struct socket *sock, int backlog) | |
526 | { | |
527 | struct sock *sk = sock->sk; | |
528 | int err = 0; | |
529 | ||
530 | BT_DBG("sk %p backlog %d", sk, backlog); | |
531 | ||
532 | lock_sock(sk); | |
533 | ||
534 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
535 | err = -EBADFD; | |
536 | goto done; | |
537 | } | |
538 | ||
539 | sk->sk_max_ack_backlog = backlog; | |
540 | sk->sk_ack_backlog = 0; | |
541 | sk->sk_state = BT_LISTEN; | |
542 | ||
543 | done: | |
544 | release_sock(sk); | |
545 | return err; | |
546 | } | |
547 | ||
548 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
549 | { | |
550 | DECLARE_WAITQUEUE(wait, current); | |
551 | struct sock *sk = sock->sk, *ch; | |
552 | long timeo; | |
553 | int err = 0; | |
554 | ||
555 | lock_sock(sk); | |
556 | ||
557 | if (sk->sk_state != BT_LISTEN) { | |
558 | err = -EBADFD; | |
559 | goto done; | |
560 | } | |
561 | ||
562 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
563 | ||
564 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
565 | ||
566 | /* Wait for an incoming connection. (wake-one). */ | |
567 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
568 | while (!(ch = bt_accept_dequeue(sk, newsock))) { | |
569 | set_current_state(TASK_INTERRUPTIBLE); | |
570 | if (!timeo) { | |
571 | err = -EAGAIN; | |
572 | break; | |
573 | } | |
574 | ||
575 | release_sock(sk); | |
576 | timeo = schedule_timeout(timeo); | |
577 | lock_sock(sk); | |
578 | ||
579 | if (sk->sk_state != BT_LISTEN) { | |
580 | err = -EBADFD; | |
581 | break; | |
582 | } | |
583 | ||
584 | if (signal_pending(current)) { | |
585 | err = sock_intr_errno(timeo); | |
586 | break; | |
587 | } | |
588 | } | |
589 | set_current_state(TASK_RUNNING); | |
590 | remove_wait_queue(sk->sk_sleep, &wait); | |
591 | ||
592 | if (err) | |
593 | goto done; | |
594 | ||
595 | newsock->state = SS_CONNECTED; | |
596 | ||
597 | BT_DBG("new socket %p", ch); | |
598 | ||
599 | done: | |
600 | release_sock(sk); | |
601 | return err; | |
602 | } | |
603 | ||
604 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
605 | { | |
606 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
607 | struct sock *sk = sock->sk; | |
608 | ||
609 | BT_DBG("sock %p, sk %p", sock, sk); | |
610 | ||
611 | addr->sa_family = AF_BLUETOOTH; | |
612 | *len = sizeof(struct sockaddr_sco); | |
613 | ||
614 | if (peer) | |
615 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
616 | else | |
617 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
618 | ||
619 | return 0; | |
620 | } | |
621 | ||
8e87d142 | 622 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
623 | struct msghdr *msg, size_t len) |
624 | { | |
625 | struct sock *sk = sock->sk; | |
626 | int err = 0; | |
627 | ||
628 | BT_DBG("sock %p, sk %p", sock, sk); | |
629 | ||
c1cbe4b7 BL |
630 | err = sock_error(sk); |
631 | if (err) | |
632 | return err; | |
1da177e4 LT |
633 | |
634 | if (msg->msg_flags & MSG_OOB) | |
635 | return -EOPNOTSUPP; | |
636 | ||
637 | lock_sock(sk); | |
638 | ||
639 | if (sk->sk_state == BT_CONNECTED) | |
640 | err = sco_send_frame(sk, msg, len); | |
641 | else | |
642 | err = -ENOTCONN; | |
643 | ||
644 | release_sock(sk); | |
645 | return err; | |
646 | } | |
647 | ||
b7058842 | 648 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
649 | { |
650 | struct sock *sk = sock->sk; | |
651 | int err = 0; | |
652 | ||
653 | BT_DBG("sk %p", sk); | |
654 | ||
655 | lock_sock(sk); | |
656 | ||
657 | switch (optname) { | |
658 | default: | |
659 | err = -ENOPROTOOPT; | |
660 | break; | |
661 | } | |
662 | ||
663 | release_sock(sk); | |
664 | return err; | |
665 | } | |
666 | ||
d58daf42 | 667 | static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
668 | { |
669 | struct sock *sk = sock->sk; | |
670 | struct sco_options opts; | |
671 | struct sco_conninfo cinfo; | |
8e87d142 | 672 | int len, err = 0; |
1da177e4 LT |
673 | |
674 | BT_DBG("sk %p", sk); | |
675 | ||
676 | if (get_user(len, optlen)) | |
677 | return -EFAULT; | |
678 | ||
679 | lock_sock(sk); | |
680 | ||
681 | switch (optname) { | |
682 | case SCO_OPTIONS: | |
683 | if (sk->sk_state != BT_CONNECTED) { | |
684 | err = -ENOTCONN; | |
685 | break; | |
686 | } | |
687 | ||
688 | opts.mtu = sco_pi(sk)->conn->mtu; | |
689 | ||
690 | BT_DBG("mtu %d", opts.mtu); | |
691 | ||
692 | len = min_t(unsigned int, len, sizeof(opts)); | |
693 | if (copy_to_user(optval, (char *)&opts, len)) | |
694 | err = -EFAULT; | |
695 | ||
696 | break; | |
697 | ||
698 | case SCO_CONNINFO: | |
699 | if (sk->sk_state != BT_CONNECTED) { | |
700 | err = -ENOTCONN; | |
701 | break; | |
702 | } | |
703 | ||
704 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; | |
705 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
706 | ||
707 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
708 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
709 | err = -EFAULT; | |
710 | ||
711 | break; | |
712 | ||
713 | default: | |
714 | err = -ENOPROTOOPT; | |
715 | break; | |
716 | } | |
717 | ||
718 | release_sock(sk); | |
719 | return err; | |
720 | } | |
721 | ||
d58daf42 MH |
722 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
723 | { | |
724 | struct sock *sk = sock->sk; | |
725 | int len, err = 0; | |
726 | ||
727 | BT_DBG("sk %p", sk); | |
728 | ||
729 | if (level == SOL_SCO) | |
730 | return sco_sock_getsockopt_old(sock, optname, optval, optlen); | |
731 | ||
732 | if (get_user(len, optlen)) | |
733 | return -EFAULT; | |
734 | ||
735 | lock_sock(sk); | |
736 | ||
737 | switch (optname) { | |
738 | default: | |
739 | err = -ENOPROTOOPT; | |
740 | break; | |
741 | } | |
742 | ||
743 | release_sock(sk); | |
744 | return err; | |
745 | } | |
746 | ||
fd0b3ff7 MH |
747 | static int sco_sock_shutdown(struct socket *sock, int how) |
748 | { | |
749 | struct sock *sk = sock->sk; | |
750 | int err = 0; | |
751 | ||
752 | BT_DBG("sock %p, sk %p", sock, sk); | |
753 | ||
754 | if (!sk) | |
755 | return 0; | |
756 | ||
757 | lock_sock(sk); | |
758 | if (!sk->sk_shutdown) { | |
759 | sk->sk_shutdown = SHUTDOWN_MASK; | |
760 | sco_sock_clear_timer(sk); | |
761 | __sco_sock_close(sk); | |
762 | ||
763 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
764 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
765 | sk->sk_lingertime); | |
766 | } | |
767 | release_sock(sk); | |
768 | return err; | |
769 | } | |
770 | ||
1da177e4 LT |
771 | static int sco_sock_release(struct socket *sock) |
772 | { | |
773 | struct sock *sk = sock->sk; | |
774 | int err = 0; | |
775 | ||
776 | BT_DBG("sock %p, sk %p", sock, sk); | |
777 | ||
778 | if (!sk) | |
779 | return 0; | |
780 | ||
781 | sco_sock_close(sk); | |
782 | ||
783 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
784 | lock_sock(sk); | |
785 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
786 | release_sock(sk); | |
787 | } | |
788 | ||
789 | sock_orphan(sk); | |
790 | sco_sock_kill(sk); | |
791 | return err; | |
792 | } | |
793 | ||
794 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
795 | { | |
796 | BT_DBG("conn %p", conn); | |
797 | ||
798 | sco_pi(sk)->conn = conn; | |
799 | conn->sk = sk; | |
800 | ||
801 | if (parent) | |
802 | bt_accept_enqueue(parent, sk); | |
803 | } | |
804 | ||
8e87d142 | 805 | /* Delete channel. |
1da177e4 LT |
806 | * Must be called on the locked socket. */ |
807 | static void sco_chan_del(struct sock *sk, int err) | |
808 | { | |
809 | struct sco_conn *conn; | |
810 | ||
811 | conn = sco_pi(sk)->conn; | |
812 | ||
813 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
814 | ||
8e87d142 | 815 | if (conn) { |
1da177e4 LT |
816 | sco_conn_lock(conn); |
817 | conn->sk = NULL; | |
818 | sco_pi(sk)->conn = NULL; | |
819 | sco_conn_unlock(conn); | |
820 | hci_conn_put(conn->hcon); | |
821 | } | |
822 | ||
823 | sk->sk_state = BT_CLOSED; | |
824 | sk->sk_err = err; | |
825 | sk->sk_state_change(sk); | |
826 | ||
827 | sock_set_flag(sk, SOCK_ZAPPED); | |
828 | } | |
829 | ||
830 | static void sco_conn_ready(struct sco_conn *conn) | |
831 | { | |
832 | struct sock *parent, *sk; | |
833 | ||
834 | BT_DBG("conn %p", conn); | |
835 | ||
836 | sco_conn_lock(conn); | |
837 | ||
838 | if ((sk = conn->sk)) { | |
839 | sco_sock_clear_timer(sk); | |
840 | bh_lock_sock(sk); | |
841 | sk->sk_state = BT_CONNECTED; | |
842 | sk->sk_state_change(sk); | |
843 | bh_unlock_sock(sk); | |
844 | } else { | |
845 | parent = sco_get_sock_listen(conn->src); | |
846 | if (!parent) | |
847 | goto done; | |
848 | ||
849 | bh_lock_sock(parent); | |
850 | ||
3b1e0a65 | 851 | sk = sco_sock_alloc(sock_net(parent), NULL, BTPROTO_SCO, GFP_ATOMIC); |
1da177e4 LT |
852 | if (!sk) { |
853 | bh_unlock_sock(parent); | |
854 | goto done; | |
855 | } | |
856 | ||
857 | sco_sock_init(sk, parent); | |
858 | ||
859 | bacpy(&bt_sk(sk)->src, conn->src); | |
860 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
861 | ||
862 | hci_conn_hold(conn->hcon); | |
863 | __sco_chan_add(conn, sk, parent); | |
864 | ||
865 | sk->sk_state = BT_CONNECTED; | |
866 | ||
867 | /* Wake up parent */ | |
868 | parent->sk_data_ready(parent, 1); | |
869 | ||
870 | bh_unlock_sock(parent); | |
871 | } | |
872 | ||
873 | done: | |
874 | sco_conn_unlock(conn); | |
875 | } | |
876 | ||
877 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
878 | static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type) | |
879 | { | |
71aeeaa1 MH |
880 | register struct sock *sk; |
881 | struct hlist_node *node; | |
882 | int lm = 0; | |
883 | ||
884 | if (type != SCO_LINK && type != ESCO_LINK) | |
885 | return 0; | |
886 | ||
1da177e4 LT |
887 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
888 | ||
71aeeaa1 MH |
889 | /* Find listening sockets */ |
890 | read_lock(&sco_sk_list.lock); | |
891 | sk_for_each(sk, node, &sco_sk_list.head) { | |
892 | if (sk->sk_state != BT_LISTEN) | |
893 | continue; | |
894 | ||
895 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || | |
896 | !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { | |
897 | lm |= HCI_LM_ACCEPT; | |
898 | break; | |
899 | } | |
900 | } | |
901 | read_unlock(&sco_sk_list.lock); | |
902 | ||
903 | return lm; | |
1da177e4 LT |
904 | } |
905 | ||
906 | static int sco_connect_cfm(struct hci_conn *hcon, __u8 status) | |
907 | { | |
908 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
909 | ||
b6a0dc82 | 910 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
1da177e4 LT |
911 | return 0; |
912 | ||
913 | if (!status) { | |
914 | struct sco_conn *conn; | |
915 | ||
916 | conn = sco_conn_add(hcon, status); | |
917 | if (conn) | |
918 | sco_conn_ready(conn); | |
8e87d142 | 919 | } else |
1da177e4 LT |
920 | sco_conn_del(hcon, bt_err(status)); |
921 | ||
922 | return 0; | |
923 | } | |
924 | ||
2950f21a | 925 | static int sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
1da177e4 LT |
926 | { |
927 | BT_DBG("hcon %p reason %d", hcon, reason); | |
928 | ||
b6a0dc82 | 929 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
1da177e4 LT |
930 | return 0; |
931 | ||
932 | sco_conn_del(hcon, bt_err(reason)); | |
b6a0dc82 | 933 | |
1da177e4 LT |
934 | return 0; |
935 | } | |
936 | ||
937 | static int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) | |
938 | { | |
939 | struct sco_conn *conn = hcon->sco_data; | |
940 | ||
941 | if (!conn) | |
942 | goto drop; | |
943 | ||
944 | BT_DBG("conn %p len %d", conn, skb->len); | |
945 | ||
946 | if (skb->len) { | |
947 | sco_recv_frame(conn, skb); | |
948 | return 0; | |
949 | } | |
950 | ||
951 | drop: | |
8e87d142 | 952 | kfree_skb(skb); |
1da177e4 LT |
953 | return 0; |
954 | } | |
955 | ||
be9d1227 | 956 | static ssize_t sco_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
957 | { |
958 | struct sock *sk; | |
959 | struct hlist_node *node; | |
be9d1227 | 960 | char *str = buf; |
1da177e4 LT |
961 | |
962 | read_lock_bh(&sco_sk_list.lock); | |
963 | ||
be9d1227 MH |
964 | sk_for_each(sk, node, &sco_sk_list.head) { |
965 | str += sprintf(str, "%s %s %d\n", | |
966 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), | |
967 | sk->sk_state); | |
968 | } | |
1da177e4 | 969 | |
1da177e4 | 970 | read_unlock_bh(&sco_sk_list.lock); |
1da177e4 | 971 | |
be9d1227 | 972 | return (str - buf); |
1da177e4 LT |
973 | } |
974 | ||
be9d1227 | 975 | static CLASS_ATTR(sco, S_IRUGO, sco_sysfs_show, NULL); |
1da177e4 | 976 | |
90ddc4f0 | 977 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
978 | .family = PF_BLUETOOTH, |
979 | .owner = THIS_MODULE, | |
980 | .release = sco_sock_release, | |
981 | .bind = sco_sock_bind, | |
982 | .connect = sco_sock_connect, | |
983 | .listen = sco_sock_listen, | |
984 | .accept = sco_sock_accept, | |
985 | .getname = sco_sock_getname, | |
986 | .sendmsg = sco_sock_sendmsg, | |
987 | .recvmsg = bt_sock_recvmsg, | |
988 | .poll = bt_sock_poll, | |
3241ad82 | 989 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
990 | .mmap = sock_no_mmap, |
991 | .socketpair = sock_no_socketpair, | |
fd0b3ff7 | 992 | .shutdown = sco_sock_shutdown, |
1da177e4 LT |
993 | .setsockopt = sco_sock_setsockopt, |
994 | .getsockopt = sco_sock_getsockopt | |
995 | }; | |
996 | ||
ec1b4cf7 | 997 | static const struct net_proto_family sco_sock_family_ops = { |
1da177e4 LT |
998 | .family = PF_BLUETOOTH, |
999 | .owner = THIS_MODULE, | |
1000 | .create = sco_sock_create, | |
1001 | }; | |
1002 | ||
1003 | static struct hci_proto sco_hci_proto = { | |
1004 | .name = "SCO", | |
1005 | .id = HCI_PROTO_SCO, | |
1006 | .connect_ind = sco_connect_ind, | |
1007 | .connect_cfm = sco_connect_cfm, | |
2950f21a | 1008 | .disconn_cfm = sco_disconn_cfm, |
1da177e4 LT |
1009 | .recv_scodata = sco_recv_scodata |
1010 | }; | |
1011 | ||
1012 | static int __init sco_init(void) | |
1013 | { | |
1014 | int err; | |
1015 | ||
1016 | err = proto_register(&sco_proto, 0); | |
1017 | if (err < 0) | |
1018 | return err; | |
1019 | ||
1020 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1021 | if (err < 0) { | |
1022 | BT_ERR("SCO socket registration failed"); | |
1023 | goto error; | |
1024 | } | |
1025 | ||
1026 | err = hci_register_proto(&sco_hci_proto); | |
1027 | if (err < 0) { | |
1028 | BT_ERR("SCO protocol registration failed"); | |
1029 | bt_sock_unregister(BTPROTO_SCO); | |
1030 | goto error; | |
1031 | } | |
1032 | ||
df5c37ea MH |
1033 | if (class_create_file(bt_class, &class_attr_sco) < 0) |
1034 | BT_ERR("Failed to create SCO info file"); | |
1da177e4 LT |
1035 | |
1036 | BT_INFO("SCO (Voice Link) ver %s", VERSION); | |
1037 | BT_INFO("SCO socket layer initialized"); | |
1038 | ||
1039 | return 0; | |
1040 | ||
1041 | error: | |
1042 | proto_unregister(&sco_proto); | |
1043 | return err; | |
1044 | } | |
1045 | ||
1046 | static void __exit sco_exit(void) | |
1047 | { | |
a91f2e39 | 1048 | class_remove_file(bt_class, &class_attr_sco); |
1da177e4 LT |
1049 | |
1050 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1051 | BT_ERR("SCO socket unregistration failed"); | |
1052 | ||
1053 | if (hci_unregister_proto(&sco_hci_proto) < 0) | |
1054 | BT_ERR("SCO protocol unregistration failed"); | |
1055 | ||
1056 | proto_unregister(&sco_proto); | |
1057 | } | |
1058 | ||
1059 | module_init(sco_init); | |
1060 | module_exit(sco_exit); | |
1061 | ||
7cb127d5 MH |
1062 | module_param(disable_esco, bool, 0644); |
1063 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); | |
1064 | ||
63fbd24e | 1065 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
1066 | MODULE_DESCRIPTION("Bluetooth SCO ver " VERSION); |
1067 | MODULE_VERSION(VERSION); | |
1068 | MODULE_LICENSE("GPL"); | |
1069 | MODULE_ALIAS("bt-proto-2"); |