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 | ||
51 | #ifndef CONFIG_BT_SCO_DEBUG | |
52 | #undef BT_DBG | |
53 | #define BT_DBG(D...) | |
54 | #endif | |
55 | ||
7cb127d5 MH |
56 | #define VERSION "0.6" |
57 | ||
58 | static int disable_esco = 0; | |
1da177e4 | 59 | |
90ddc4f0 | 60 | static const struct proto_ops sco_sock_ops; |
1da177e4 LT |
61 | |
62 | static struct bt_sock_list sco_sk_list = { | |
d5fb2962 | 63 | .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock) |
1da177e4 LT |
64 | }; |
65 | ||
66 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent); | |
67 | static void sco_chan_del(struct sock *sk, int err); | |
68 | ||
69 | static int sco_conn_del(struct hci_conn *conn, int err); | |
70 | ||
71 | static void sco_sock_close(struct sock *sk); | |
72 | static void sco_sock_kill(struct sock *sk); | |
73 | ||
74 | /* ---- SCO timers ---- */ | |
75 | static void sco_sock_timeout(unsigned long arg) | |
76 | { | |
77 | struct sock *sk = (struct sock *) arg; | |
78 | ||
79 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
80 | ||
81 | bh_lock_sock(sk); | |
82 | sk->sk_err = ETIMEDOUT; | |
83 | sk->sk_state_change(sk); | |
84 | bh_unlock_sock(sk); | |
85 | ||
86 | sco_sock_kill(sk); | |
87 | sock_put(sk); | |
88 | } | |
89 | ||
90 | static void sco_sock_set_timer(struct sock *sk, long timeout) | |
91 | { | |
92 | BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
93 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
94 | } | |
95 | ||
96 | static void sco_sock_clear_timer(struct sock *sk) | |
97 | { | |
98 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
99 | sk_stop_timer(sk, &sk->sk_timer); | |
100 | } | |
101 | ||
1da177e4 LT |
102 | /* ---- SCO connections ---- */ |
103 | static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status) | |
104 | { | |
105 | struct hci_dev *hdev = hcon->hdev; | |
25ea6db0 | 106 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 | 107 | |
25ea6db0 | 108 | if (conn || status) |
1da177e4 LT |
109 | return conn; |
110 | ||
25ea6db0 MH |
111 | conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC); |
112 | if (!conn) | |
1da177e4 | 113 | return NULL; |
1da177e4 LT |
114 | |
115 | spin_lock_init(&conn->lock); | |
116 | ||
117 | hcon->sco_data = conn; | |
118 | conn->hcon = hcon; | |
119 | ||
120 | conn->src = &hdev->bdaddr; | |
121 | conn->dst = &hcon->dst; | |
122 | ||
123 | if (hdev->sco_mtu > 0) | |
124 | conn->mtu = hdev->sco_mtu; | |
125 | else | |
126 | conn->mtu = 60; | |
127 | ||
128 | BT_DBG("hcon %p conn %p", hcon, conn); | |
25ea6db0 | 129 | |
1da177e4 LT |
130 | return conn; |
131 | } | |
132 | ||
133 | static inline struct sock *sco_chan_get(struct sco_conn *conn) | |
134 | { | |
135 | struct sock *sk = NULL; | |
136 | sco_conn_lock(conn); | |
137 | sk = conn->sk; | |
138 | sco_conn_unlock(conn); | |
139 | return sk; | |
140 | } | |
141 | ||
142 | static int sco_conn_del(struct hci_conn *hcon, int err) | |
143 | { | |
144 | struct sco_conn *conn; | |
145 | struct sock *sk; | |
146 | ||
8e87d142 | 147 | if (!(conn = hcon->sco_data)) |
1da177e4 LT |
148 | return 0; |
149 | ||
150 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
151 | ||
152 | /* Kill socket */ | |
153 | if ((sk = sco_chan_get(conn))) { | |
154 | bh_lock_sock(sk); | |
155 | sco_sock_clear_timer(sk); | |
156 | sco_chan_del(sk, err); | |
157 | bh_unlock_sock(sk); | |
158 | sco_sock_kill(sk); | |
159 | } | |
160 | ||
161 | hcon->sco_data = NULL; | |
162 | kfree(conn); | |
163 | return 0; | |
164 | } | |
165 | ||
166 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
167 | { | |
168 | int err = 0; | |
169 | ||
170 | sco_conn_lock(conn); | |
171 | if (conn->sk) { | |
172 | err = -EBUSY; | |
173 | } else { | |
174 | __sco_chan_add(conn, sk, parent); | |
175 | } | |
176 | sco_conn_unlock(conn); | |
177 | return err; | |
178 | } | |
179 | ||
180 | static int sco_connect(struct sock *sk) | |
181 | { | |
182 | bdaddr_t *src = &bt_sk(sk)->src; | |
183 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
184 | struct sco_conn *conn; | |
185 | struct hci_conn *hcon; | |
186 | struct hci_dev *hdev; | |
b6a0dc82 | 187 | int err, type; |
1da177e4 LT |
188 | |
189 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
190 | ||
191 | if (!(hdev = hci_get_route(dst, src))) | |
192 | return -EHOSTUNREACH; | |
193 | ||
194 | hci_dev_lock_bh(hdev); | |
195 | ||
196 | err = -ENOMEM; | |
197 | ||
7cb127d5 MH |
198 | if (lmp_esco_capable(hdev) && !disable_esco) |
199 | type = ESCO_LINK; | |
200 | else | |
201 | type = SCO_LINK; | |
b6a0dc82 | 202 | |
09ab6f4c | 203 | hcon = hci_connect(hdev, type, dst, HCI_AT_NO_BONDING); |
1da177e4 LT |
204 | if (!hcon) |
205 | goto done; | |
206 | ||
207 | conn = sco_conn_add(hcon, 0); | |
208 | if (!conn) { | |
209 | hci_conn_put(hcon); | |
210 | goto done; | |
211 | } | |
212 | ||
213 | /* Update source addr of the socket */ | |
214 | bacpy(src, conn->src); | |
215 | ||
216 | err = sco_chan_add(conn, sk, NULL); | |
217 | if (err) | |
218 | goto done; | |
219 | ||
220 | if (hcon->state == BT_CONNECTED) { | |
221 | sco_sock_clear_timer(sk); | |
222 | sk->sk_state = BT_CONNECTED; | |
223 | } else { | |
224 | sk->sk_state = BT_CONNECT; | |
225 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
226 | } | |
b6a0dc82 | 227 | |
1da177e4 LT |
228 | done: |
229 | hci_dev_unlock_bh(hdev); | |
230 | hci_dev_put(hdev); | |
231 | return err; | |
232 | } | |
233 | ||
234 | static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) | |
235 | { | |
236 | struct sco_conn *conn = sco_pi(sk)->conn; | |
237 | struct sk_buff *skb; | |
238 | int err, count; | |
239 | ||
240 | /* Check outgoing MTU */ | |
241 | if (len > conn->mtu) | |
242 | return -EINVAL; | |
243 | ||
244 | BT_DBG("sk %p len %d", sk, len); | |
245 | ||
246 | count = min_t(unsigned int, conn->mtu, len); | |
247 | if (!(skb = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err))) | |
248 | return err; | |
249 | ||
250 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
251 | err = -EFAULT; | |
252 | goto fail; | |
253 | } | |
254 | ||
255 | if ((err = hci_send_sco(conn->hcon, skb)) < 0) | |
cdee5751 | 256 | return err; |
1da177e4 LT |
257 | |
258 | return count; | |
259 | ||
260 | fail: | |
261 | kfree_skb(skb); | |
262 | return err; | |
263 | } | |
264 | ||
265 | static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) | |
266 | { | |
267 | struct sock *sk = sco_chan_get(conn); | |
268 | ||
269 | if (!sk) | |
270 | goto drop; | |
271 | ||
272 | BT_DBG("sk %p len %d", sk, skb->len); | |
273 | ||
274 | if (sk->sk_state != BT_CONNECTED) | |
275 | goto drop; | |
276 | ||
277 | if (!sock_queue_rcv_skb(sk, skb)) | |
278 | return; | |
279 | ||
280 | drop: | |
281 | kfree_skb(skb); | |
282 | return; | |
283 | } | |
284 | ||
285 | /* -------- Socket interface ---------- */ | |
286 | static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba) | |
287 | { | |
288 | struct sock *sk; | |
289 | struct hlist_node *node; | |
290 | ||
291 | sk_for_each(sk, node, &sco_sk_list.head) | |
292 | if (!bacmp(&bt_sk(sk)->src, ba)) | |
293 | goto found; | |
294 | sk = NULL; | |
295 | found: | |
296 | return sk; | |
297 | } | |
298 | ||
299 | /* Find socket listening on source bdaddr. | |
300 | * Returns closest match. | |
301 | */ | |
302 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
303 | { | |
304 | struct sock *sk = NULL, *sk1 = NULL; | |
305 | struct hlist_node *node; | |
306 | ||
307 | read_lock(&sco_sk_list.lock); | |
308 | ||
309 | sk_for_each(sk, node, &sco_sk_list.head) { | |
310 | if (sk->sk_state != BT_LISTEN) | |
311 | continue; | |
312 | ||
313 | /* Exact match. */ | |
314 | if (!bacmp(&bt_sk(sk)->src, src)) | |
315 | break; | |
316 | ||
317 | /* Closest match */ | |
318 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
319 | sk1 = sk; | |
320 | } | |
321 | ||
322 | read_unlock(&sco_sk_list.lock); | |
323 | ||
324 | return node ? sk : sk1; | |
325 | } | |
326 | ||
327 | static void sco_sock_destruct(struct sock *sk) | |
328 | { | |
329 | BT_DBG("sk %p", sk); | |
330 | ||
331 | skb_queue_purge(&sk->sk_receive_queue); | |
332 | skb_queue_purge(&sk->sk_write_queue); | |
333 | } | |
334 | ||
335 | static void sco_sock_cleanup_listen(struct sock *parent) | |
336 | { | |
337 | struct sock *sk; | |
338 | ||
339 | BT_DBG("parent %p", parent); | |
340 | ||
341 | /* Close not yet accepted channels */ | |
342 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
343 | sco_sock_close(sk); | |
344 | sco_sock_kill(sk); | |
345 | } | |
346 | ||
347 | parent->sk_state = BT_CLOSED; | |
348 | sock_set_flag(parent, SOCK_ZAPPED); | |
349 | } | |
350 | ||
351 | /* Kill socket (only if zapped and orphan) | |
352 | * Must be called on unlocked socket. | |
353 | */ | |
354 | static void sco_sock_kill(struct sock *sk) | |
355 | { | |
356 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
357 | return; | |
358 | ||
359 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
360 | ||
361 | /* Kill poor orphan */ | |
362 | bt_sock_unlink(&sco_sk_list, sk); | |
363 | sock_set_flag(sk, SOCK_DEAD); | |
364 | sock_put(sk); | |
365 | } | |
366 | ||
367 | /* Close socket. | |
368 | * Must be called on unlocked socket. | |
369 | */ | |
370 | static void sco_sock_close(struct sock *sk) | |
371 | { | |
372 | struct sco_conn *conn; | |
373 | ||
374 | sco_sock_clear_timer(sk); | |
375 | ||
376 | lock_sock(sk); | |
377 | ||
378 | conn = sco_pi(sk)->conn; | |
379 | ||
380 | BT_DBG("sk %p state %d conn %p socket %p", sk, sk->sk_state, conn, sk->sk_socket); | |
381 | ||
382 | switch (sk->sk_state) { | |
383 | case BT_LISTEN: | |
384 | sco_sock_cleanup_listen(sk); | |
385 | break; | |
386 | ||
387 | case BT_CONNECTED: | |
388 | case BT_CONFIG: | |
389 | case BT_CONNECT: | |
390 | case BT_DISCONN: | |
391 | sco_chan_del(sk, ECONNRESET); | |
392 | break; | |
393 | ||
394 | default: | |
395 | sock_set_flag(sk, SOCK_ZAPPED); | |
396 | break; | |
3ff50b79 | 397 | } |
1da177e4 LT |
398 | |
399 | release_sock(sk); | |
400 | ||
401 | sco_sock_kill(sk); | |
402 | } | |
403 | ||
404 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
405 | { | |
406 | BT_DBG("sk %p", sk); | |
407 | ||
8e87d142 | 408 | if (parent) |
1da177e4 LT |
409 | sk->sk_type = parent->sk_type; |
410 | } | |
411 | ||
412 | static struct proto sco_proto = { | |
413 | .name = "SCO", | |
414 | .owner = THIS_MODULE, | |
415 | .obj_size = sizeof(struct sco_pinfo) | |
416 | }; | |
417 | ||
1b8d7ae4 | 418 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
419 | { |
420 | struct sock *sk; | |
421 | ||
6257ff21 | 422 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
423 | if (!sk) |
424 | return NULL; | |
425 | ||
426 | sock_init_data(sock, sk); | |
427 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
428 | ||
429 | sk->sk_destruct = sco_sock_destruct; | |
430 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
431 | ||
432 | sock_reset_flag(sk, SOCK_ZAPPED); | |
433 | ||
434 | sk->sk_protocol = proto; | |
435 | sk->sk_state = BT_OPEN; | |
436 | ||
b24b8a24 | 437 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
438 | |
439 | bt_sock_link(&sco_sk_list, sk); | |
440 | return sk; | |
441 | } | |
442 | ||
1b8d7ae4 | 443 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
444 | { |
445 | struct sock *sk; | |
446 | ||
447 | BT_DBG("sock %p", sock); | |
448 | ||
449 | sock->state = SS_UNCONNECTED; | |
450 | ||
451 | if (sock->type != SOCK_SEQPACKET) | |
452 | return -ESOCKTNOSUPPORT; | |
453 | ||
454 | sock->ops = &sco_sock_ops; | |
455 | ||
1b8d7ae4 | 456 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 457 | if (!sk) |
1da177e4 LT |
458 | return -ENOMEM; |
459 | ||
460 | sco_sock_init(sk, NULL); | |
461 | return 0; | |
462 | } | |
463 | ||
464 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
465 | { | |
466 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
467 | struct sock *sk = sock->sk; | |
468 | bdaddr_t *src = &sa->sco_bdaddr; | |
469 | int err = 0; | |
470 | ||
471 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
472 | ||
473 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
474 | return -EINVAL; | |
475 | ||
476 | lock_sock(sk); | |
477 | ||
478 | if (sk->sk_state != BT_OPEN) { | |
479 | err = -EBADFD; | |
480 | goto done; | |
481 | } | |
482 | ||
483 | write_lock_bh(&sco_sk_list.lock); | |
484 | ||
485 | if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) { | |
486 | err = -EADDRINUSE; | |
487 | } else { | |
488 | /* Save source address */ | |
489 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); | |
490 | sk->sk_state = BT_BOUND; | |
491 | } | |
492 | ||
493 | write_unlock_bh(&sco_sk_list.lock); | |
494 | ||
495 | done: | |
496 | release_sock(sk); | |
497 | return err; | |
498 | } | |
499 | ||
500 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
501 | { | |
502 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
503 | struct sock *sk = sock->sk; | |
504 | int err = 0; | |
505 | ||
506 | ||
507 | BT_DBG("sk %p", sk); | |
508 | ||
509 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_sco)) | |
510 | return -EINVAL; | |
511 | ||
512 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
513 | return -EBADFD; | |
514 | ||
515 | if (sk->sk_type != SOCK_SEQPACKET) | |
516 | return -EINVAL; | |
517 | ||
518 | lock_sock(sk); | |
519 | ||
520 | /* Set destination address and psm */ | |
521 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
522 | ||
523 | if ((err = sco_connect(sk))) | |
524 | goto done; | |
525 | ||
8e87d142 | 526 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
1da177e4 LT |
527 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
528 | ||
529 | done: | |
530 | release_sock(sk); | |
531 | return err; | |
532 | } | |
533 | ||
534 | static int sco_sock_listen(struct socket *sock, int backlog) | |
535 | { | |
536 | struct sock *sk = sock->sk; | |
537 | int err = 0; | |
538 | ||
539 | BT_DBG("sk %p backlog %d", sk, backlog); | |
540 | ||
541 | lock_sock(sk); | |
542 | ||
543 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
544 | err = -EBADFD; | |
545 | goto done; | |
546 | } | |
547 | ||
548 | sk->sk_max_ack_backlog = backlog; | |
549 | sk->sk_ack_backlog = 0; | |
550 | sk->sk_state = BT_LISTEN; | |
551 | ||
552 | done: | |
553 | release_sock(sk); | |
554 | return err; | |
555 | } | |
556 | ||
557 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
558 | { | |
559 | DECLARE_WAITQUEUE(wait, current); | |
560 | struct sock *sk = sock->sk, *ch; | |
561 | long timeo; | |
562 | int err = 0; | |
563 | ||
564 | lock_sock(sk); | |
565 | ||
566 | if (sk->sk_state != BT_LISTEN) { | |
567 | err = -EBADFD; | |
568 | goto done; | |
569 | } | |
570 | ||
571 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
572 | ||
573 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
574 | ||
575 | /* Wait for an incoming connection. (wake-one). */ | |
576 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
577 | while (!(ch = bt_accept_dequeue(sk, newsock))) { | |
578 | set_current_state(TASK_INTERRUPTIBLE); | |
579 | if (!timeo) { | |
580 | err = -EAGAIN; | |
581 | break; | |
582 | } | |
583 | ||
584 | release_sock(sk); | |
585 | timeo = schedule_timeout(timeo); | |
586 | lock_sock(sk); | |
587 | ||
588 | if (sk->sk_state != BT_LISTEN) { | |
589 | err = -EBADFD; | |
590 | break; | |
591 | } | |
592 | ||
593 | if (signal_pending(current)) { | |
594 | err = sock_intr_errno(timeo); | |
595 | break; | |
596 | } | |
597 | } | |
598 | set_current_state(TASK_RUNNING); | |
599 | remove_wait_queue(sk->sk_sleep, &wait); | |
600 | ||
601 | if (err) | |
602 | goto done; | |
603 | ||
604 | newsock->state = SS_CONNECTED; | |
605 | ||
606 | BT_DBG("new socket %p", ch); | |
607 | ||
608 | done: | |
609 | release_sock(sk); | |
610 | return err; | |
611 | } | |
612 | ||
613 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
614 | { | |
615 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
616 | struct sock *sk = sock->sk; | |
617 | ||
618 | BT_DBG("sock %p, sk %p", sock, sk); | |
619 | ||
620 | addr->sa_family = AF_BLUETOOTH; | |
621 | *len = sizeof(struct sockaddr_sco); | |
622 | ||
623 | if (peer) | |
624 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
625 | else | |
626 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
8e87d142 | 631 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
632 | struct msghdr *msg, size_t len) |
633 | { | |
634 | struct sock *sk = sock->sk; | |
635 | int err = 0; | |
636 | ||
637 | BT_DBG("sock %p, sk %p", sock, sk); | |
638 | ||
c1cbe4b7 BL |
639 | err = sock_error(sk); |
640 | if (err) | |
641 | return err; | |
1da177e4 LT |
642 | |
643 | if (msg->msg_flags & MSG_OOB) | |
644 | return -EOPNOTSUPP; | |
645 | ||
646 | lock_sock(sk); | |
647 | ||
648 | if (sk->sk_state == BT_CONNECTED) | |
649 | err = sco_send_frame(sk, msg, len); | |
650 | else | |
651 | err = -ENOTCONN; | |
652 | ||
653 | release_sock(sk); | |
654 | return err; | |
655 | } | |
656 | ||
657 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) | |
658 | { | |
659 | struct sock *sk = sock->sk; | |
660 | int err = 0; | |
661 | ||
662 | BT_DBG("sk %p", sk); | |
663 | ||
664 | lock_sock(sk); | |
665 | ||
666 | switch (optname) { | |
667 | default: | |
668 | err = -ENOPROTOOPT; | |
669 | break; | |
670 | } | |
671 | ||
672 | release_sock(sk); | |
673 | return err; | |
674 | } | |
675 | ||
676 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
677 | { | |
678 | struct sock *sk = sock->sk; | |
679 | struct sco_options opts; | |
680 | struct sco_conninfo cinfo; | |
8e87d142 | 681 | int len, err = 0; |
1da177e4 LT |
682 | |
683 | BT_DBG("sk %p", sk); | |
684 | ||
685 | if (get_user(len, optlen)) | |
686 | return -EFAULT; | |
687 | ||
688 | lock_sock(sk); | |
689 | ||
690 | switch (optname) { | |
691 | case SCO_OPTIONS: | |
692 | if (sk->sk_state != BT_CONNECTED) { | |
693 | err = -ENOTCONN; | |
694 | break; | |
695 | } | |
696 | ||
697 | opts.mtu = sco_pi(sk)->conn->mtu; | |
698 | ||
699 | BT_DBG("mtu %d", opts.mtu); | |
700 | ||
701 | len = min_t(unsigned int, len, sizeof(opts)); | |
702 | if (copy_to_user(optval, (char *)&opts, len)) | |
703 | err = -EFAULT; | |
704 | ||
705 | break; | |
706 | ||
707 | case SCO_CONNINFO: | |
708 | if (sk->sk_state != BT_CONNECTED) { | |
709 | err = -ENOTCONN; | |
710 | break; | |
711 | } | |
712 | ||
713 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; | |
714 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
715 | ||
716 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
717 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
718 | err = -EFAULT; | |
719 | ||
720 | break; | |
721 | ||
722 | default: | |
723 | err = -ENOPROTOOPT; | |
724 | break; | |
725 | } | |
726 | ||
727 | release_sock(sk); | |
728 | return err; | |
729 | } | |
730 | ||
731 | static int sco_sock_release(struct socket *sock) | |
732 | { | |
733 | struct sock *sk = sock->sk; | |
734 | int err = 0; | |
735 | ||
736 | BT_DBG("sock %p, sk %p", sock, sk); | |
737 | ||
738 | if (!sk) | |
739 | return 0; | |
740 | ||
741 | sco_sock_close(sk); | |
742 | ||
743 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
744 | lock_sock(sk); | |
745 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
746 | release_sock(sk); | |
747 | } | |
748 | ||
749 | sock_orphan(sk); | |
750 | sco_sock_kill(sk); | |
751 | return err; | |
752 | } | |
753 | ||
754 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
755 | { | |
756 | BT_DBG("conn %p", conn); | |
757 | ||
758 | sco_pi(sk)->conn = conn; | |
759 | conn->sk = sk; | |
760 | ||
761 | if (parent) | |
762 | bt_accept_enqueue(parent, sk); | |
763 | } | |
764 | ||
8e87d142 | 765 | /* Delete channel. |
1da177e4 LT |
766 | * Must be called on the locked socket. */ |
767 | static void sco_chan_del(struct sock *sk, int err) | |
768 | { | |
769 | struct sco_conn *conn; | |
770 | ||
771 | conn = sco_pi(sk)->conn; | |
772 | ||
773 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
774 | ||
8e87d142 | 775 | if (conn) { |
1da177e4 LT |
776 | sco_conn_lock(conn); |
777 | conn->sk = NULL; | |
778 | sco_pi(sk)->conn = NULL; | |
779 | sco_conn_unlock(conn); | |
780 | hci_conn_put(conn->hcon); | |
781 | } | |
782 | ||
783 | sk->sk_state = BT_CLOSED; | |
784 | sk->sk_err = err; | |
785 | sk->sk_state_change(sk); | |
786 | ||
787 | sock_set_flag(sk, SOCK_ZAPPED); | |
788 | } | |
789 | ||
790 | static void sco_conn_ready(struct sco_conn *conn) | |
791 | { | |
792 | struct sock *parent, *sk; | |
793 | ||
794 | BT_DBG("conn %p", conn); | |
795 | ||
796 | sco_conn_lock(conn); | |
797 | ||
798 | if ((sk = conn->sk)) { | |
799 | sco_sock_clear_timer(sk); | |
800 | bh_lock_sock(sk); | |
801 | sk->sk_state = BT_CONNECTED; | |
802 | sk->sk_state_change(sk); | |
803 | bh_unlock_sock(sk); | |
804 | } else { | |
805 | parent = sco_get_sock_listen(conn->src); | |
806 | if (!parent) | |
807 | goto done; | |
808 | ||
809 | bh_lock_sock(parent); | |
810 | ||
3b1e0a65 | 811 | sk = sco_sock_alloc(sock_net(parent), NULL, BTPROTO_SCO, GFP_ATOMIC); |
1da177e4 LT |
812 | if (!sk) { |
813 | bh_unlock_sock(parent); | |
814 | goto done; | |
815 | } | |
816 | ||
817 | sco_sock_init(sk, parent); | |
818 | ||
819 | bacpy(&bt_sk(sk)->src, conn->src); | |
820 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
821 | ||
822 | hci_conn_hold(conn->hcon); | |
823 | __sco_chan_add(conn, sk, parent); | |
824 | ||
825 | sk->sk_state = BT_CONNECTED; | |
826 | ||
827 | /* Wake up parent */ | |
828 | parent->sk_data_ready(parent, 1); | |
829 | ||
830 | bh_unlock_sock(parent); | |
831 | } | |
832 | ||
833 | done: | |
834 | sco_conn_unlock(conn); | |
835 | } | |
836 | ||
837 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
838 | static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type) | |
839 | { | |
840 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
841 | ||
842 | /* Always accept connection */ | |
843 | return HCI_LM_ACCEPT; | |
844 | } | |
845 | ||
846 | static int sco_connect_cfm(struct hci_conn *hcon, __u8 status) | |
847 | { | |
848 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
849 | ||
b6a0dc82 | 850 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
1da177e4 LT |
851 | return 0; |
852 | ||
853 | if (!status) { | |
854 | struct sco_conn *conn; | |
855 | ||
856 | conn = sco_conn_add(hcon, status); | |
857 | if (conn) | |
858 | sco_conn_ready(conn); | |
8e87d142 | 859 | } else |
1da177e4 LT |
860 | sco_conn_del(hcon, bt_err(status)); |
861 | ||
862 | return 0; | |
863 | } | |
864 | ||
865 | static int sco_disconn_ind(struct hci_conn *hcon, __u8 reason) | |
866 | { | |
867 | BT_DBG("hcon %p reason %d", hcon, reason); | |
868 | ||
b6a0dc82 | 869 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
1da177e4 LT |
870 | return 0; |
871 | ||
872 | sco_conn_del(hcon, bt_err(reason)); | |
b6a0dc82 | 873 | |
1da177e4 LT |
874 | return 0; |
875 | } | |
876 | ||
877 | static int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) | |
878 | { | |
879 | struct sco_conn *conn = hcon->sco_data; | |
880 | ||
881 | if (!conn) | |
882 | goto drop; | |
883 | ||
884 | BT_DBG("conn %p len %d", conn, skb->len); | |
885 | ||
886 | if (skb->len) { | |
887 | sco_recv_frame(conn, skb); | |
888 | return 0; | |
889 | } | |
890 | ||
891 | drop: | |
8e87d142 | 892 | kfree_skb(skb); |
1da177e4 LT |
893 | return 0; |
894 | } | |
895 | ||
be9d1227 | 896 | static ssize_t sco_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
897 | { |
898 | struct sock *sk; | |
899 | struct hlist_node *node; | |
be9d1227 | 900 | char *str = buf; |
1da177e4 LT |
901 | |
902 | read_lock_bh(&sco_sk_list.lock); | |
903 | ||
be9d1227 MH |
904 | sk_for_each(sk, node, &sco_sk_list.head) { |
905 | str += sprintf(str, "%s %s %d\n", | |
906 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), | |
907 | sk->sk_state); | |
908 | } | |
1da177e4 | 909 | |
1da177e4 | 910 | read_unlock_bh(&sco_sk_list.lock); |
1da177e4 | 911 | |
be9d1227 | 912 | return (str - buf); |
1da177e4 LT |
913 | } |
914 | ||
be9d1227 | 915 | static CLASS_ATTR(sco, S_IRUGO, sco_sysfs_show, NULL); |
1da177e4 | 916 | |
90ddc4f0 | 917 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
918 | .family = PF_BLUETOOTH, |
919 | .owner = THIS_MODULE, | |
920 | .release = sco_sock_release, | |
921 | .bind = sco_sock_bind, | |
922 | .connect = sco_sock_connect, | |
923 | .listen = sco_sock_listen, | |
924 | .accept = sco_sock_accept, | |
925 | .getname = sco_sock_getname, | |
926 | .sendmsg = sco_sock_sendmsg, | |
927 | .recvmsg = bt_sock_recvmsg, | |
928 | .poll = bt_sock_poll, | |
3241ad82 | 929 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
930 | .mmap = sock_no_mmap, |
931 | .socketpair = sock_no_socketpair, | |
932 | .shutdown = sock_no_shutdown, | |
933 | .setsockopt = sco_sock_setsockopt, | |
934 | .getsockopt = sco_sock_getsockopt | |
935 | }; | |
936 | ||
937 | static struct net_proto_family sco_sock_family_ops = { | |
938 | .family = PF_BLUETOOTH, | |
939 | .owner = THIS_MODULE, | |
940 | .create = sco_sock_create, | |
941 | }; | |
942 | ||
943 | static struct hci_proto sco_hci_proto = { | |
944 | .name = "SCO", | |
945 | .id = HCI_PROTO_SCO, | |
946 | .connect_ind = sco_connect_ind, | |
947 | .connect_cfm = sco_connect_cfm, | |
948 | .disconn_ind = sco_disconn_ind, | |
949 | .recv_scodata = sco_recv_scodata | |
950 | }; | |
951 | ||
952 | static int __init sco_init(void) | |
953 | { | |
954 | int err; | |
955 | ||
956 | err = proto_register(&sco_proto, 0); | |
957 | if (err < 0) | |
958 | return err; | |
959 | ||
960 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
961 | if (err < 0) { | |
962 | BT_ERR("SCO socket registration failed"); | |
963 | goto error; | |
964 | } | |
965 | ||
966 | err = hci_register_proto(&sco_hci_proto); | |
967 | if (err < 0) { | |
968 | BT_ERR("SCO protocol registration failed"); | |
969 | bt_sock_unregister(BTPROTO_SCO); | |
970 | goto error; | |
971 | } | |
972 | ||
df5c37ea MH |
973 | if (class_create_file(bt_class, &class_attr_sco) < 0) |
974 | BT_ERR("Failed to create SCO info file"); | |
1da177e4 LT |
975 | |
976 | BT_INFO("SCO (Voice Link) ver %s", VERSION); | |
977 | BT_INFO("SCO socket layer initialized"); | |
978 | ||
979 | return 0; | |
980 | ||
981 | error: | |
982 | proto_unregister(&sco_proto); | |
983 | return err; | |
984 | } | |
985 | ||
986 | static void __exit sco_exit(void) | |
987 | { | |
a91f2e39 | 988 | class_remove_file(bt_class, &class_attr_sco); |
1da177e4 LT |
989 | |
990 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
991 | BT_ERR("SCO socket unregistration failed"); | |
992 | ||
993 | if (hci_unregister_proto(&sco_hci_proto) < 0) | |
994 | BT_ERR("SCO protocol unregistration failed"); | |
995 | ||
996 | proto_unregister(&sco_proto); | |
997 | } | |
998 | ||
999 | module_init(sco_init); | |
1000 | module_exit(sco_exit); | |
1001 | ||
7cb127d5 MH |
1002 | module_param(disable_esco, bool, 0644); |
1003 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); | |
1004 | ||
63fbd24e | 1005 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
1da177e4 LT |
1006 | MODULE_DESCRIPTION("Bluetooth SCO ver " VERSION); |
1007 | MODULE_VERSION(VERSION); | |
1008 | MODULE_LICENSE("GPL"); | |
1009 | MODULE_ALIAS("bt-proto-2"); |