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 | ||
735cbc47 | 53 | static int disable_esco; |
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 | { | |
735cbc47 | 139 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 LT |
140 | struct sock *sk; |
141 | ||
735cbc47 | 142 | if (!conn) |
1da177e4 LT |
143 | return 0; |
144 | ||
145 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
146 | ||
147 | /* Kill socket */ | |
735cbc47 AE |
148 | sk = sco_chan_get(conn); |
149 | if (sk) { | |
1da177e4 LT |
150 | bh_lock_sock(sk); |
151 | sco_sock_clear_timer(sk); | |
152 | sco_chan_del(sk, err); | |
153 | bh_unlock_sock(sk); | |
154 | sco_sock_kill(sk); | |
155 | } | |
156 | ||
157 | hcon->sco_data = NULL; | |
158 | kfree(conn); | |
159 | return 0; | |
160 | } | |
161 | ||
162 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
163 | { | |
164 | int err = 0; | |
165 | ||
166 | sco_conn_lock(conn); | |
b9dbdbc1 | 167 | if (conn->sk) |
1da177e4 | 168 | err = -EBUSY; |
b9dbdbc1 | 169 | else |
1da177e4 | 170 | __sco_chan_add(conn, sk, parent); |
b9dbdbc1 | 171 | |
1da177e4 LT |
172 | sco_conn_unlock(conn); |
173 | return err; | |
174 | } | |
175 | ||
176 | static int sco_connect(struct sock *sk) | |
177 | { | |
178 | bdaddr_t *src = &bt_sk(sk)->src; | |
179 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
180 | struct sco_conn *conn; | |
181 | struct hci_conn *hcon; | |
182 | struct hci_dev *hdev; | |
b6a0dc82 | 183 | int err, type; |
1da177e4 LT |
184 | |
185 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
186 | ||
735cbc47 AE |
187 | hdev = hci_get_route(dst, src); |
188 | if (!hdev) | |
1da177e4 LT |
189 | return -EHOSTUNREACH; |
190 | ||
191 | hci_dev_lock_bh(hdev); | |
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); |
30e76272 VT |
199 | if (IS_ERR(hcon)) { |
200 | err = PTR_ERR(hcon); | |
1da177e4 | 201 | goto done; |
30e76272 | 202 | } |
1da177e4 LT |
203 | |
204 | conn = sco_conn_add(hcon, 0); | |
205 | if (!conn) { | |
206 | hci_conn_put(hcon); | |
30e76272 | 207 | err = -ENOMEM; |
1da177e4 LT |
208 | goto done; |
209 | } | |
210 | ||
211 | /* Update source addr of the socket */ | |
212 | bacpy(src, conn->src); | |
213 | ||
214 | err = sco_chan_add(conn, sk, NULL); | |
215 | if (err) | |
216 | goto done; | |
217 | ||
218 | if (hcon->state == BT_CONNECTED) { | |
219 | sco_sock_clear_timer(sk); | |
220 | sk->sk_state = BT_CONNECTED; | |
221 | } else { | |
222 | sk->sk_state = BT_CONNECT; | |
223 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
224 | } | |
b6a0dc82 | 225 | |
1da177e4 LT |
226 | done: |
227 | hci_dev_unlock_bh(hdev); | |
228 | hci_dev_put(hdev); | |
229 | return err; | |
230 | } | |
231 | ||
232 | static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) | |
233 | { | |
234 | struct sco_conn *conn = sco_pi(sk)->conn; | |
235 | struct sk_buff *skb; | |
236 | int err, count; | |
237 | ||
238 | /* Check outgoing MTU */ | |
239 | if (len > conn->mtu) | |
240 | return -EINVAL; | |
241 | ||
242 | BT_DBG("sk %p len %d", sk, len); | |
243 | ||
244 | count = min_t(unsigned int, conn->mtu, len); | |
b9dbdbc1 GP |
245 | skb = bt_skb_send_alloc(sk, count, |
246 | msg->msg_flags & MSG_DONTWAIT, &err); | |
247 | if (!skb) | |
1da177e4 LT |
248 | return err; |
249 | ||
250 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
b9dbdbc1 GP |
251 | kfree_skb(skb); |
252 | return -EFAULT; | |
1da177e4 LT |
253 | } |
254 | ||
0d861d8b | 255 | hci_send_sco(conn->hcon, skb); |
1da177e4 LT |
256 | |
257 | return count; | |
1da177e4 LT |
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); | |
1da177e4 LT |
277 | } |
278 | ||
279 | /* -------- Socket interface ---------- */ | |
280 | static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba) | |
281 | { | |
282 | struct sock *sk; | |
283 | struct hlist_node *node; | |
284 | ||
285 | sk_for_each(sk, node, &sco_sk_list.head) | |
286 | if (!bacmp(&bt_sk(sk)->src, ba)) | |
287 | goto found; | |
288 | sk = NULL; | |
289 | found: | |
290 | return sk; | |
291 | } | |
292 | ||
293 | /* Find socket listening on source bdaddr. | |
294 | * Returns closest match. | |
295 | */ | |
296 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
297 | { | |
298 | struct sock *sk = NULL, *sk1 = NULL; | |
299 | struct hlist_node *node; | |
300 | ||
301 | read_lock(&sco_sk_list.lock); | |
302 | ||
303 | sk_for_each(sk, node, &sco_sk_list.head) { | |
304 | if (sk->sk_state != BT_LISTEN) | |
305 | continue; | |
306 | ||
307 | /* Exact match. */ | |
308 | if (!bacmp(&bt_sk(sk)->src, src)) | |
309 | break; | |
310 | ||
311 | /* Closest match */ | |
312 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
313 | sk1 = sk; | |
314 | } | |
315 | ||
316 | read_unlock(&sco_sk_list.lock); | |
317 | ||
318 | return node ? sk : sk1; | |
319 | } | |
320 | ||
321 | static void sco_sock_destruct(struct sock *sk) | |
322 | { | |
323 | BT_DBG("sk %p", sk); | |
324 | ||
325 | skb_queue_purge(&sk->sk_receive_queue); | |
326 | skb_queue_purge(&sk->sk_write_queue); | |
327 | } | |
328 | ||
329 | static void sco_sock_cleanup_listen(struct sock *parent) | |
330 | { | |
331 | struct sock *sk; | |
332 | ||
333 | BT_DBG("parent %p", parent); | |
334 | ||
335 | /* Close not yet accepted channels */ | |
336 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
337 | sco_sock_close(sk); | |
338 | sco_sock_kill(sk); | |
339 | } | |
340 | ||
341 | parent->sk_state = BT_CLOSED; | |
342 | sock_set_flag(parent, SOCK_ZAPPED); | |
343 | } | |
344 | ||
345 | /* Kill socket (only if zapped and orphan) | |
346 | * Must be called on unlocked socket. | |
347 | */ | |
348 | static void sco_sock_kill(struct sock *sk) | |
349 | { | |
350 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
351 | return; | |
352 | ||
353 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
354 | ||
355 | /* Kill poor orphan */ | |
356 | bt_sock_unlink(&sco_sk_list, sk); | |
357 | sock_set_flag(sk, SOCK_DEAD); | |
358 | sock_put(sk); | |
359 | } | |
360 | ||
fd0b3ff7 | 361 | static void __sco_sock_close(struct sock *sk) |
1da177e4 | 362 | { |
fd0b3ff7 | 363 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
1da177e4 LT |
364 | |
365 | switch (sk->sk_state) { | |
366 | case BT_LISTEN: | |
367 | sco_sock_cleanup_listen(sk); | |
368 | break; | |
369 | ||
370 | case BT_CONNECTED: | |
371 | case BT_CONFIG: | |
372 | case BT_CONNECT: | |
373 | case BT_DISCONN: | |
374 | sco_chan_del(sk, ECONNRESET); | |
375 | break; | |
376 | ||
377 | default: | |
378 | sock_set_flag(sk, SOCK_ZAPPED); | |
379 | break; | |
3ff50b79 | 380 | } |
fd0b3ff7 | 381 | } |
1da177e4 | 382 | |
fd0b3ff7 MH |
383 | /* Must be called on unlocked socket. */ |
384 | static void sco_sock_close(struct sock *sk) | |
385 | { | |
386 | sco_sock_clear_timer(sk); | |
387 | lock_sock(sk); | |
388 | __sco_sock_close(sk); | |
1da177e4 | 389 | release_sock(sk); |
1da177e4 LT |
390 | sco_sock_kill(sk); |
391 | } | |
392 | ||
393 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
394 | { | |
395 | BT_DBG("sk %p", sk); | |
396 | ||
8e87d142 | 397 | if (parent) |
1da177e4 LT |
398 | sk->sk_type = parent->sk_type; |
399 | } | |
400 | ||
401 | static struct proto sco_proto = { | |
402 | .name = "SCO", | |
403 | .owner = THIS_MODULE, | |
404 | .obj_size = sizeof(struct sco_pinfo) | |
405 | }; | |
406 | ||
1b8d7ae4 | 407 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
408 | { |
409 | struct sock *sk; | |
410 | ||
6257ff21 | 411 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
412 | if (!sk) |
413 | return NULL; | |
414 | ||
415 | sock_init_data(sock, sk); | |
416 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
417 | ||
418 | sk->sk_destruct = sco_sock_destruct; | |
419 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
420 | ||
421 | sock_reset_flag(sk, SOCK_ZAPPED); | |
422 | ||
423 | sk->sk_protocol = proto; | |
424 | sk->sk_state = BT_OPEN; | |
425 | ||
b24b8a24 | 426 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
427 | |
428 | bt_sock_link(&sco_sk_list, sk); | |
429 | return sk; | |
430 | } | |
431 | ||
3f378b68 EP |
432 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol, |
433 | int kern) | |
1da177e4 LT |
434 | { |
435 | struct sock *sk; | |
436 | ||
437 | BT_DBG("sock %p", sock); | |
438 | ||
439 | sock->state = SS_UNCONNECTED; | |
440 | ||
441 | if (sock->type != SOCK_SEQPACKET) | |
442 | return -ESOCKTNOSUPPORT; | |
443 | ||
444 | sock->ops = &sco_sock_ops; | |
445 | ||
1b8d7ae4 | 446 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 447 | if (!sk) |
1da177e4 LT |
448 | return -ENOMEM; |
449 | ||
450 | sco_sock_init(sk, NULL); | |
451 | return 0; | |
452 | } | |
453 | ||
454 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
455 | { | |
456 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
457 | struct sock *sk = sock->sk; | |
458 | bdaddr_t *src = &sa->sco_bdaddr; | |
459 | int err = 0; | |
460 | ||
461 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
462 | ||
463 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
464 | return -EINVAL; | |
465 | ||
466 | lock_sock(sk); | |
467 | ||
468 | if (sk->sk_state != BT_OPEN) { | |
469 | err = -EBADFD; | |
470 | goto done; | |
471 | } | |
472 | ||
473 | write_lock_bh(&sco_sk_list.lock); | |
474 | ||
475 | if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) { | |
476 | err = -EADDRINUSE; | |
477 | } else { | |
478 | /* Save source address */ | |
479 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); | |
480 | sk->sk_state = BT_BOUND; | |
481 | } | |
482 | ||
483 | write_unlock_bh(&sco_sk_list.lock); | |
484 | ||
485 | done: | |
486 | release_sock(sk); | |
487 | return err; | |
488 | } | |
489 | ||
490 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
491 | { | |
492 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
493 | struct sock *sk = sock->sk; | |
494 | int err = 0; | |
495 | ||
496 | ||
497 | BT_DBG("sk %p", sk); | |
498 | ||
6503d961 CG |
499 | if (alen < sizeof(struct sockaddr_sco) || |
500 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
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 | ||
735cbc47 AE |
514 | err = sco_connect(sk); |
515 | if (err) | |
1da177e4 LT |
516 | goto done; |
517 | ||
8e87d142 | 518 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
1da177e4 LT |
519 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
520 | ||
521 | done: | |
522 | release_sock(sk); | |
523 | return err; | |
524 | } | |
525 | ||
526 | static int sco_sock_listen(struct socket *sock, int backlog) | |
527 | { | |
528 | struct sock *sk = sock->sk; | |
529 | int err = 0; | |
530 | ||
531 | BT_DBG("sk %p backlog %d", sk, backlog); | |
532 | ||
533 | lock_sock(sk); | |
534 | ||
535 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
536 | err = -EBADFD; | |
537 | goto done; | |
538 | } | |
539 | ||
540 | sk->sk_max_ack_backlog = backlog; | |
541 | sk->sk_ack_backlog = 0; | |
542 | sk->sk_state = BT_LISTEN; | |
543 | ||
544 | done: | |
545 | release_sock(sk); | |
546 | return err; | |
547 | } | |
548 | ||
549 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
550 | { | |
551 | DECLARE_WAITQUEUE(wait, current); | |
552 | struct sock *sk = sock->sk, *ch; | |
553 | long timeo; | |
554 | int err = 0; | |
555 | ||
556 | lock_sock(sk); | |
557 | ||
558 | if (sk->sk_state != BT_LISTEN) { | |
559 | err = -EBADFD; | |
560 | goto done; | |
561 | } | |
562 | ||
563 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
564 | ||
565 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
566 | ||
567 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 568 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
1da177e4 LT |
569 | while (!(ch = bt_accept_dequeue(sk, newsock))) { |
570 | set_current_state(TASK_INTERRUPTIBLE); | |
571 | if (!timeo) { | |
572 | err = -EAGAIN; | |
573 | break; | |
574 | } | |
575 | ||
576 | release_sock(sk); | |
577 | timeo = schedule_timeout(timeo); | |
578 | lock_sock(sk); | |
579 | ||
580 | if (sk->sk_state != BT_LISTEN) { | |
581 | err = -EBADFD; | |
582 | break; | |
583 | } | |
584 | ||
585 | if (signal_pending(current)) { | |
586 | err = sock_intr_errno(timeo); | |
587 | break; | |
588 | } | |
589 | } | |
590 | set_current_state(TASK_RUNNING); | |
aa395145 | 591 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
592 | |
593 | if (err) | |
594 | goto done; | |
595 | ||
596 | newsock->state = SS_CONNECTED; | |
597 | ||
598 | BT_DBG("new socket %p", ch); | |
599 | ||
600 | done: | |
601 | release_sock(sk); | |
602 | return err; | |
603 | } | |
604 | ||
605 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
606 | { | |
607 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
608 | struct sock *sk = sock->sk; | |
609 | ||
610 | BT_DBG("sock %p, sk %p", sock, sk); | |
611 | ||
612 | addr->sa_family = AF_BLUETOOTH; | |
613 | *len = sizeof(struct sockaddr_sco); | |
614 | ||
615 | if (peer) | |
616 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
617 | else | |
618 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
8e87d142 | 623 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
624 | struct msghdr *msg, size_t len) |
625 | { | |
626 | struct sock *sk = sock->sk; | |
b9dbdbc1 | 627 | int err; |
1da177e4 LT |
628 | |
629 | BT_DBG("sock %p, sk %p", sock, sk); | |
630 | ||
c1cbe4b7 BL |
631 | err = sock_error(sk); |
632 | if (err) | |
633 | return err; | |
1da177e4 LT |
634 | |
635 | if (msg->msg_flags & MSG_OOB) | |
636 | return -EOPNOTSUPP; | |
637 | ||
638 | lock_sock(sk); | |
639 | ||
640 | if (sk->sk_state == BT_CONNECTED) | |
641 | err = sco_send_frame(sk, msg, len); | |
642 | else | |
643 | err = -ENOTCONN; | |
644 | ||
645 | release_sock(sk); | |
646 | return err; | |
647 | } | |
648 | ||
b7058842 | 649 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
650 | { |
651 | struct sock *sk = sock->sk; | |
652 | int err = 0; | |
653 | ||
654 | BT_DBG("sk %p", sk); | |
655 | ||
656 | lock_sock(sk); | |
657 | ||
658 | switch (optname) { | |
659 | default: | |
660 | err = -ENOPROTOOPT; | |
661 | break; | |
662 | } | |
663 | ||
664 | release_sock(sk); | |
665 | return err; | |
666 | } | |
667 | ||
d58daf42 | 668 | static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
669 | { |
670 | struct sock *sk = sock->sk; | |
671 | struct sco_options opts; | |
672 | struct sco_conninfo cinfo; | |
8e87d142 | 673 | int len, err = 0; |
1da177e4 LT |
674 | |
675 | BT_DBG("sk %p", sk); | |
676 | ||
677 | if (get_user(len, optlen)) | |
678 | return -EFAULT; | |
679 | ||
680 | lock_sock(sk); | |
681 | ||
682 | switch (optname) { | |
683 | case SCO_OPTIONS: | |
684 | if (sk->sk_state != BT_CONNECTED) { | |
685 | err = -ENOTCONN; | |
686 | break; | |
687 | } | |
688 | ||
689 | opts.mtu = sco_pi(sk)->conn->mtu; | |
690 | ||
691 | BT_DBG("mtu %d", opts.mtu); | |
692 | ||
693 | len = min_t(unsigned int, len, sizeof(opts)); | |
694 | if (copy_to_user(optval, (char *)&opts, len)) | |
695 | err = -EFAULT; | |
696 | ||
697 | break; | |
698 | ||
699 | case SCO_CONNINFO: | |
700 | if (sk->sk_state != BT_CONNECTED) { | |
701 | err = -ENOTCONN; | |
702 | break; | |
703 | } | |
704 | ||
c4c896e1 | 705 | memset(&cinfo, 0, sizeof(cinfo)); |
1da177e4 LT |
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 | ||
64274518 | 1026 | int __init sco_init(void) |
1da177e4 LT |
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 | 1053 | |
1da177e4 LT |
1054 | BT_INFO("SCO socket layer initialized"); |
1055 | ||
1056 | return 0; | |
1057 | ||
1058 | error: | |
1059 | proto_unregister(&sco_proto); | |
1060 | return err; | |
1061 | } | |
1062 | ||
64274518 | 1063 | void __exit sco_exit(void) |
1da177e4 | 1064 | { |
aef7d97c | 1065 | debugfs_remove(sco_debugfs); |
1da177e4 LT |
1066 | |
1067 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1068 | BT_ERR("SCO socket unregistration failed"); | |
1069 | ||
1070 | if (hci_unregister_proto(&sco_hci_proto) < 0) | |
1071 | BT_ERR("SCO protocol unregistration failed"); | |
1072 | ||
1073 | proto_unregister(&sco_proto); | |
1074 | } | |
1075 | ||
7cb127d5 MH |
1076 | module_param(disable_esco, bool, 0644); |
1077 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); |