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Commit | Line | Data |
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8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth SCO sockets. */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/kernel.h> | |
1da177e4 LT |
32 | #include <linux/sched.h> |
33 | #include <linux/slab.h> | |
34 | #include <linux/poll.h> | |
35 | #include <linux/fcntl.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/socket.h> | |
39 | #include <linux/skbuff.h> | |
be9d1227 | 40 | #include <linux/device.h> |
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 | ||
be9d1227 | 56 | #define VERSION "0.5" |
1da177e4 | 57 | |
90ddc4f0 | 58 | static const struct proto_ops sco_sock_ops; |
1da177e4 LT |
59 | |
60 | static struct bt_sock_list sco_sk_list = { | |
d5fb2962 | 61 | .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock) |
1da177e4 LT |
62 | }; |
63 | ||
64 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent); | |
65 | static void sco_chan_del(struct sock *sk, int err); | |
66 | ||
67 | static int sco_conn_del(struct hci_conn *conn, int err); | |
68 | ||
69 | static void sco_sock_close(struct sock *sk); | |
70 | static void sco_sock_kill(struct sock *sk); | |
71 | ||
72 | /* ---- SCO timers ---- */ | |
73 | static void sco_sock_timeout(unsigned long arg) | |
74 | { | |
75 | struct sock *sk = (struct sock *) arg; | |
76 | ||
77 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
78 | ||
79 | bh_lock_sock(sk); | |
80 | sk->sk_err = ETIMEDOUT; | |
81 | sk->sk_state_change(sk); | |
82 | bh_unlock_sock(sk); | |
83 | ||
84 | sco_sock_kill(sk); | |
85 | sock_put(sk); | |
86 | } | |
87 | ||
88 | static void sco_sock_set_timer(struct sock *sk, long timeout) | |
89 | { | |
90 | BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
91 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
92 | } | |
93 | ||
94 | static void sco_sock_clear_timer(struct sock *sk) | |
95 | { | |
96 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
97 | sk_stop_timer(sk, &sk->sk_timer); | |
98 | } | |
99 | ||
1da177e4 LT |
100 | /* ---- SCO connections ---- */ |
101 | static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status) | |
102 | { | |
103 | struct hci_dev *hdev = hcon->hdev; | |
25ea6db0 | 104 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 | 105 | |
25ea6db0 | 106 | if (conn || status) |
1da177e4 LT |
107 | return conn; |
108 | ||
25ea6db0 MH |
109 | conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC); |
110 | if (!conn) | |
1da177e4 | 111 | return NULL; |
1da177e4 LT |
112 | |
113 | spin_lock_init(&conn->lock); | |
114 | ||
115 | hcon->sco_data = conn; | |
116 | conn->hcon = hcon; | |
117 | ||
118 | conn->src = &hdev->bdaddr; | |
119 | conn->dst = &hcon->dst; | |
120 | ||
121 | if (hdev->sco_mtu > 0) | |
122 | conn->mtu = hdev->sco_mtu; | |
123 | else | |
124 | conn->mtu = 60; | |
125 | ||
126 | BT_DBG("hcon %p conn %p", hcon, conn); | |
25ea6db0 | 127 | |
1da177e4 LT |
128 | return conn; |
129 | } | |
130 | ||
131 | static inline struct sock *sco_chan_get(struct sco_conn *conn) | |
132 | { | |
133 | struct sock *sk = NULL; | |
134 | sco_conn_lock(conn); | |
135 | sk = conn->sk; | |
136 | sco_conn_unlock(conn); | |
137 | return sk; | |
138 | } | |
139 | ||
140 | static int sco_conn_del(struct hci_conn *hcon, int err) | |
141 | { | |
142 | struct sco_conn *conn; | |
143 | struct sock *sk; | |
144 | ||
8e87d142 | 145 | if (!(conn = hcon->sco_data)) |
1da177e4 LT |
146 | return 0; |
147 | ||
148 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
149 | ||
150 | /* Kill socket */ | |
151 | if ((sk = sco_chan_get(conn))) { | |
152 | bh_lock_sock(sk); | |
153 | sco_sock_clear_timer(sk); | |
154 | sco_chan_del(sk, err); | |
155 | bh_unlock_sock(sk); | |
156 | sco_sock_kill(sk); | |
157 | } | |
158 | ||
159 | hcon->sco_data = NULL; | |
160 | kfree(conn); | |
161 | return 0; | |
162 | } | |
163 | ||
164 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
165 | { | |
166 | int err = 0; | |
167 | ||
168 | sco_conn_lock(conn); | |
169 | if (conn->sk) { | |
170 | err = -EBUSY; | |
171 | } else { | |
172 | __sco_chan_add(conn, sk, parent); | |
173 | } | |
174 | sco_conn_unlock(conn); | |
175 | return err; | |
176 | } | |
177 | ||
178 | static int sco_connect(struct sock *sk) | |
179 | { | |
180 | bdaddr_t *src = &bt_sk(sk)->src; | |
181 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
182 | struct sco_conn *conn; | |
183 | struct hci_conn *hcon; | |
184 | struct hci_dev *hdev; | |
b6a0dc82 | 185 | int err, type; |
1da177e4 LT |
186 | |
187 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
188 | ||
189 | if (!(hdev = hci_get_route(dst, src))) | |
190 | return -EHOSTUNREACH; | |
191 | ||
192 | hci_dev_lock_bh(hdev); | |
193 | ||
194 | err = -ENOMEM; | |
195 | ||
b6a0dc82 MH |
196 | type = lmp_esco_capable(hdev) ? ESCO_LINK : SCO_LINK; |
197 | ||
198 | hcon = hci_connect(hdev, type, dst); | |
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 | ||
362 | /* Close socket. | |
363 | * Must be called on unlocked socket. | |
364 | */ | |
365 | static void sco_sock_close(struct sock *sk) | |
366 | { | |
367 | struct sco_conn *conn; | |
368 | ||
369 | sco_sock_clear_timer(sk); | |
370 | ||
371 | lock_sock(sk); | |
372 | ||
373 | conn = sco_pi(sk)->conn; | |
374 | ||
375 | BT_DBG("sk %p state %d conn %p socket %p", sk, sk->sk_state, conn, sk->sk_socket); | |
376 | ||
377 | switch (sk->sk_state) { | |
378 | case BT_LISTEN: | |
379 | sco_sock_cleanup_listen(sk); | |
380 | break; | |
381 | ||
382 | case BT_CONNECTED: | |
383 | case BT_CONFIG: | |
384 | case BT_CONNECT: | |
385 | case BT_DISCONN: | |
386 | sco_chan_del(sk, ECONNRESET); | |
387 | break; | |
388 | ||
389 | default: | |
390 | sock_set_flag(sk, SOCK_ZAPPED); | |
391 | break; | |
3ff50b79 | 392 | } |
1da177e4 LT |
393 | |
394 | release_sock(sk); | |
395 | ||
396 | sco_sock_kill(sk); | |
397 | } | |
398 | ||
399 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
400 | { | |
401 | BT_DBG("sk %p", sk); | |
402 | ||
8e87d142 | 403 | if (parent) |
1da177e4 LT |
404 | sk->sk_type = parent->sk_type; |
405 | } | |
406 | ||
407 | static struct proto sco_proto = { | |
408 | .name = "SCO", | |
409 | .owner = THIS_MODULE, | |
410 | .obj_size = sizeof(struct sco_pinfo) | |
411 | }; | |
412 | ||
1b8d7ae4 | 413 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
414 | { |
415 | struct sock *sk; | |
416 | ||
6257ff21 | 417 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
418 | if (!sk) |
419 | return NULL; | |
420 | ||
421 | sock_init_data(sock, sk); | |
422 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
423 | ||
424 | sk->sk_destruct = sco_sock_destruct; | |
425 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
426 | ||
427 | sock_reset_flag(sk, SOCK_ZAPPED); | |
428 | ||
429 | sk->sk_protocol = proto; | |
430 | sk->sk_state = BT_OPEN; | |
431 | ||
b24b8a24 | 432 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
433 | |
434 | bt_sock_link(&sco_sk_list, sk); | |
435 | return sk; | |
436 | } | |
437 | ||
1b8d7ae4 | 438 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
439 | { |
440 | struct sock *sk; | |
441 | ||
442 | BT_DBG("sock %p", sock); | |
443 | ||
444 | sock->state = SS_UNCONNECTED; | |
445 | ||
446 | if (sock->type != SOCK_SEQPACKET) | |
447 | return -ESOCKTNOSUPPORT; | |
448 | ||
449 | sock->ops = &sco_sock_ops; | |
450 | ||
1b8d7ae4 | 451 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 452 | if (!sk) |
1da177e4 LT |
453 | return -ENOMEM; |
454 | ||
455 | sco_sock_init(sk, NULL); | |
456 | return 0; | |
457 | } | |
458 | ||
459 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
460 | { | |
461 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
462 | struct sock *sk = sock->sk; | |
463 | bdaddr_t *src = &sa->sco_bdaddr; | |
464 | int err = 0; | |
465 | ||
466 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
467 | ||
468 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
469 | return -EINVAL; | |
470 | ||
471 | lock_sock(sk); | |
472 | ||
473 | if (sk->sk_state != BT_OPEN) { | |
474 | err = -EBADFD; | |
475 | goto done; | |
476 | } | |
477 | ||
478 | write_lock_bh(&sco_sk_list.lock); | |
479 | ||
480 | if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) { | |
481 | err = -EADDRINUSE; | |
482 | } else { | |
483 | /* Save source address */ | |
484 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); | |
485 | sk->sk_state = BT_BOUND; | |
486 | } | |
487 | ||
488 | write_unlock_bh(&sco_sk_list.lock); | |
489 | ||
490 | done: | |
491 | release_sock(sk); | |
492 | return err; | |
493 | } | |
494 | ||
495 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
496 | { | |
497 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
498 | struct sock *sk = sock->sk; | |
499 | int err = 0; | |
500 | ||
501 | ||
502 | BT_DBG("sk %p", sk); | |
503 | ||
504 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_sco)) | |
505 | return -EINVAL; | |
506 | ||
507 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
508 | return -EBADFD; | |
509 | ||
510 | if (sk->sk_type != SOCK_SEQPACKET) | |
511 | return -EINVAL; | |
512 | ||
513 | lock_sock(sk); | |
514 | ||
515 | /* Set destination address and psm */ | |
516 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
517 | ||
518 | if ((err = sco_connect(sk))) | |
519 | goto done; | |
520 | ||
8e87d142 | 521 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
1da177e4 LT |
522 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
523 | ||
524 | done: | |
525 | release_sock(sk); | |
526 | return err; | |
527 | } | |
528 | ||
529 | static int sco_sock_listen(struct socket *sock, int backlog) | |
530 | { | |
531 | struct sock *sk = sock->sk; | |
532 | int err = 0; | |
533 | ||
534 | BT_DBG("sk %p backlog %d", sk, backlog); | |
535 | ||
536 | lock_sock(sk); | |
537 | ||
538 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
539 | err = -EBADFD; | |
540 | goto done; | |
541 | } | |
542 | ||
543 | sk->sk_max_ack_backlog = backlog; | |
544 | sk->sk_ack_backlog = 0; | |
545 | sk->sk_state = BT_LISTEN; | |
546 | ||
547 | done: | |
548 | release_sock(sk); | |
549 | return err; | |
550 | } | |
551 | ||
552 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
553 | { | |
554 | DECLARE_WAITQUEUE(wait, current); | |
555 | struct sock *sk = sock->sk, *ch; | |
556 | long timeo; | |
557 | int err = 0; | |
558 | ||
559 | lock_sock(sk); | |
560 | ||
561 | if (sk->sk_state != BT_LISTEN) { | |
562 | err = -EBADFD; | |
563 | goto done; | |
564 | } | |
565 | ||
566 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
567 | ||
568 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
569 | ||
570 | /* Wait for an incoming connection. (wake-one). */ | |
571 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
572 | while (!(ch = bt_accept_dequeue(sk, newsock))) { | |
573 | set_current_state(TASK_INTERRUPTIBLE); | |
574 | if (!timeo) { | |
575 | err = -EAGAIN; | |
576 | break; | |
577 | } | |
578 | ||
579 | release_sock(sk); | |
580 | timeo = schedule_timeout(timeo); | |
581 | lock_sock(sk); | |
582 | ||
583 | if (sk->sk_state != BT_LISTEN) { | |
584 | err = -EBADFD; | |
585 | break; | |
586 | } | |
587 | ||
588 | if (signal_pending(current)) { | |
589 | err = sock_intr_errno(timeo); | |
590 | break; | |
591 | } | |
592 | } | |
593 | set_current_state(TASK_RUNNING); | |
594 | remove_wait_queue(sk->sk_sleep, &wait); | |
595 | ||
596 | if (err) | |
597 | goto done; | |
598 | ||
599 | newsock->state = SS_CONNECTED; | |
600 | ||
601 | BT_DBG("new socket %p", ch); | |
602 | ||
603 | done: | |
604 | release_sock(sk); | |
605 | return err; | |
606 | } | |
607 | ||
608 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
609 | { | |
610 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
611 | struct sock *sk = sock->sk; | |
612 | ||
613 | BT_DBG("sock %p, sk %p", sock, sk); | |
614 | ||
615 | addr->sa_family = AF_BLUETOOTH; | |
616 | *len = sizeof(struct sockaddr_sco); | |
617 | ||
618 | if (peer) | |
619 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
620 | else | |
621 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
622 | ||
623 | return 0; | |
624 | } | |
625 | ||
8e87d142 | 626 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
627 | struct msghdr *msg, size_t len) |
628 | { | |
629 | struct sock *sk = sock->sk; | |
630 | int err = 0; | |
631 | ||
632 | BT_DBG("sock %p, sk %p", sock, sk); | |
633 | ||
c1cbe4b7 BL |
634 | err = sock_error(sk); |
635 | if (err) | |
636 | return err; | |
1da177e4 LT |
637 | |
638 | if (msg->msg_flags & MSG_OOB) | |
639 | return -EOPNOTSUPP; | |
640 | ||
641 | lock_sock(sk); | |
642 | ||
643 | if (sk->sk_state == BT_CONNECTED) | |
644 | err = sco_send_frame(sk, msg, len); | |
645 | else | |
646 | err = -ENOTCONN; | |
647 | ||
648 | release_sock(sk); | |
649 | return err; | |
650 | } | |
651 | ||
652 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) | |
653 | { | |
654 | struct sock *sk = sock->sk; | |
655 | int err = 0; | |
656 | ||
657 | BT_DBG("sk %p", sk); | |
658 | ||
659 | lock_sock(sk); | |
660 | ||
661 | switch (optname) { | |
662 | default: | |
663 | err = -ENOPROTOOPT; | |
664 | break; | |
665 | } | |
666 | ||
667 | release_sock(sk); | |
668 | return err; | |
669 | } | |
670 | ||
671 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
672 | { | |
673 | struct sock *sk = sock->sk; | |
674 | struct sco_options opts; | |
675 | struct sco_conninfo cinfo; | |
8e87d142 | 676 | int len, err = 0; |
1da177e4 LT |
677 | |
678 | BT_DBG("sk %p", sk); | |
679 | ||
680 | if (get_user(len, optlen)) | |
681 | return -EFAULT; | |
682 | ||
683 | lock_sock(sk); | |
684 | ||
685 | switch (optname) { | |
686 | case SCO_OPTIONS: | |
687 | if (sk->sk_state != BT_CONNECTED) { | |
688 | err = -ENOTCONN; | |
689 | break; | |
690 | } | |
691 | ||
692 | opts.mtu = sco_pi(sk)->conn->mtu; | |
693 | ||
694 | BT_DBG("mtu %d", opts.mtu); | |
695 | ||
696 | len = min_t(unsigned int, len, sizeof(opts)); | |
697 | if (copy_to_user(optval, (char *)&opts, len)) | |
698 | err = -EFAULT; | |
699 | ||
700 | break; | |
701 | ||
702 | case SCO_CONNINFO: | |
703 | if (sk->sk_state != BT_CONNECTED) { | |
704 | err = -ENOTCONN; | |
705 | break; | |
706 | } | |
707 | ||
708 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; | |
709 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
710 | ||
711 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
712 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
713 | err = -EFAULT; | |
714 | ||
715 | break; | |
716 | ||
717 | default: | |
718 | err = -ENOPROTOOPT; | |
719 | break; | |
720 | } | |
721 | ||
722 | release_sock(sk); | |
723 | return err; | |
724 | } | |
725 | ||
726 | static int sco_sock_release(struct socket *sock) | |
727 | { | |
728 | struct sock *sk = sock->sk; | |
729 | int err = 0; | |
730 | ||
731 | BT_DBG("sock %p, sk %p", sock, sk); | |
732 | ||
733 | if (!sk) | |
734 | return 0; | |
735 | ||
736 | sco_sock_close(sk); | |
737 | ||
738 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
739 | lock_sock(sk); | |
740 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
741 | release_sock(sk); | |
742 | } | |
743 | ||
744 | sock_orphan(sk); | |
745 | sco_sock_kill(sk); | |
746 | return err; | |
747 | } | |
748 | ||
749 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
750 | { | |
751 | BT_DBG("conn %p", conn); | |
752 | ||
753 | sco_pi(sk)->conn = conn; | |
754 | conn->sk = sk; | |
755 | ||
756 | if (parent) | |
757 | bt_accept_enqueue(parent, sk); | |
758 | } | |
759 | ||
8e87d142 | 760 | /* Delete channel. |
1da177e4 LT |
761 | * Must be called on the locked socket. */ |
762 | static void sco_chan_del(struct sock *sk, int err) | |
763 | { | |
764 | struct sco_conn *conn; | |
765 | ||
766 | conn = sco_pi(sk)->conn; | |
767 | ||
768 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
769 | ||
8e87d142 | 770 | if (conn) { |
1da177e4 LT |
771 | sco_conn_lock(conn); |
772 | conn->sk = NULL; | |
773 | sco_pi(sk)->conn = NULL; | |
774 | sco_conn_unlock(conn); | |
775 | hci_conn_put(conn->hcon); | |
776 | } | |
777 | ||
778 | sk->sk_state = BT_CLOSED; | |
779 | sk->sk_err = err; | |
780 | sk->sk_state_change(sk); | |
781 | ||
782 | sock_set_flag(sk, SOCK_ZAPPED); | |
783 | } | |
784 | ||
785 | static void sco_conn_ready(struct sco_conn *conn) | |
786 | { | |
787 | struct sock *parent, *sk; | |
788 | ||
789 | BT_DBG("conn %p", conn); | |
790 | ||
791 | sco_conn_lock(conn); | |
792 | ||
793 | if ((sk = conn->sk)) { | |
794 | sco_sock_clear_timer(sk); | |
795 | bh_lock_sock(sk); | |
796 | sk->sk_state = BT_CONNECTED; | |
797 | sk->sk_state_change(sk); | |
798 | bh_unlock_sock(sk); | |
799 | } else { | |
800 | parent = sco_get_sock_listen(conn->src); | |
801 | if (!parent) | |
802 | goto done; | |
803 | ||
804 | bh_lock_sock(parent); | |
805 | ||
3b1e0a65 | 806 | sk = sco_sock_alloc(sock_net(parent), NULL, BTPROTO_SCO, GFP_ATOMIC); |
1da177e4 LT |
807 | if (!sk) { |
808 | bh_unlock_sock(parent); | |
809 | goto done; | |
810 | } | |
811 | ||
812 | sco_sock_init(sk, parent); | |
813 | ||
814 | bacpy(&bt_sk(sk)->src, conn->src); | |
815 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
816 | ||
817 | hci_conn_hold(conn->hcon); | |
818 | __sco_chan_add(conn, sk, parent); | |
819 | ||
820 | sk->sk_state = BT_CONNECTED; | |
821 | ||
822 | /* Wake up parent */ | |
823 | parent->sk_data_ready(parent, 1); | |
824 | ||
825 | bh_unlock_sock(parent); | |
826 | } | |
827 | ||
828 | done: | |
829 | sco_conn_unlock(conn); | |
830 | } | |
831 | ||
832 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
833 | static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type) | |
834 | { | |
835 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
836 | ||
837 | /* Always accept connection */ | |
838 | return HCI_LM_ACCEPT; | |
839 | } | |
840 | ||
841 | static int sco_connect_cfm(struct hci_conn *hcon, __u8 status) | |
842 | { | |
843 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
844 | ||
b6a0dc82 | 845 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
1da177e4 LT |
846 | return 0; |
847 | ||
848 | if (!status) { | |
849 | struct sco_conn *conn; | |
850 | ||
851 | conn = sco_conn_add(hcon, status); | |
852 | if (conn) | |
853 | sco_conn_ready(conn); | |
8e87d142 | 854 | } else |
1da177e4 LT |
855 | sco_conn_del(hcon, bt_err(status)); |
856 | ||
857 | return 0; | |
858 | } | |
859 | ||
860 | static int sco_disconn_ind(struct hci_conn *hcon, __u8 reason) | |
861 | { | |
862 | BT_DBG("hcon %p reason %d", hcon, reason); | |
863 | ||
b6a0dc82 | 864 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
1da177e4 LT |
865 | return 0; |
866 | ||
867 | sco_conn_del(hcon, bt_err(reason)); | |
b6a0dc82 | 868 | |
1da177e4 LT |
869 | return 0; |
870 | } | |
871 | ||
872 | static int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) | |
873 | { | |
874 | struct sco_conn *conn = hcon->sco_data; | |
875 | ||
876 | if (!conn) | |
877 | goto drop; | |
878 | ||
879 | BT_DBG("conn %p len %d", conn, skb->len); | |
880 | ||
881 | if (skb->len) { | |
882 | sco_recv_frame(conn, skb); | |
883 | return 0; | |
884 | } | |
885 | ||
886 | drop: | |
8e87d142 | 887 | kfree_skb(skb); |
1da177e4 LT |
888 | return 0; |
889 | } | |
890 | ||
be9d1227 | 891 | static ssize_t sco_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
892 | { |
893 | struct sock *sk; | |
894 | struct hlist_node *node; | |
be9d1227 | 895 | char *str = buf; |
1da177e4 LT |
896 | |
897 | read_lock_bh(&sco_sk_list.lock); | |
898 | ||
be9d1227 MH |
899 | sk_for_each(sk, node, &sco_sk_list.head) { |
900 | str += sprintf(str, "%s %s %d\n", | |
901 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), | |
902 | sk->sk_state); | |
903 | } | |
1da177e4 | 904 | |
1da177e4 | 905 | read_unlock_bh(&sco_sk_list.lock); |
1da177e4 | 906 | |
be9d1227 | 907 | return (str - buf); |
1da177e4 LT |
908 | } |
909 | ||
be9d1227 | 910 | static CLASS_ATTR(sco, S_IRUGO, sco_sysfs_show, NULL); |
1da177e4 | 911 | |
90ddc4f0 | 912 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
913 | .family = PF_BLUETOOTH, |
914 | .owner = THIS_MODULE, | |
915 | .release = sco_sock_release, | |
916 | .bind = sco_sock_bind, | |
917 | .connect = sco_sock_connect, | |
918 | .listen = sco_sock_listen, | |
919 | .accept = sco_sock_accept, | |
920 | .getname = sco_sock_getname, | |
921 | .sendmsg = sco_sock_sendmsg, | |
922 | .recvmsg = bt_sock_recvmsg, | |
923 | .poll = bt_sock_poll, | |
924 | .ioctl = sock_no_ioctl, | |
925 | .mmap = sock_no_mmap, | |
926 | .socketpair = sock_no_socketpair, | |
927 | .shutdown = sock_no_shutdown, | |
928 | .setsockopt = sco_sock_setsockopt, | |
929 | .getsockopt = sco_sock_getsockopt | |
930 | }; | |
931 | ||
932 | static struct net_proto_family sco_sock_family_ops = { | |
933 | .family = PF_BLUETOOTH, | |
934 | .owner = THIS_MODULE, | |
935 | .create = sco_sock_create, | |
936 | }; | |
937 | ||
938 | static struct hci_proto sco_hci_proto = { | |
939 | .name = "SCO", | |
940 | .id = HCI_PROTO_SCO, | |
941 | .connect_ind = sco_connect_ind, | |
942 | .connect_cfm = sco_connect_cfm, | |
943 | .disconn_ind = sco_disconn_ind, | |
944 | .recv_scodata = sco_recv_scodata | |
945 | }; | |
946 | ||
947 | static int __init sco_init(void) | |
948 | { | |
949 | int err; | |
950 | ||
951 | err = proto_register(&sco_proto, 0); | |
952 | if (err < 0) | |
953 | return err; | |
954 | ||
955 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
956 | if (err < 0) { | |
957 | BT_ERR("SCO socket registration failed"); | |
958 | goto error; | |
959 | } | |
960 | ||
961 | err = hci_register_proto(&sco_hci_proto); | |
962 | if (err < 0) { | |
963 | BT_ERR("SCO protocol registration failed"); | |
964 | bt_sock_unregister(BTPROTO_SCO); | |
965 | goto error; | |
966 | } | |
967 | ||
df5c37ea MH |
968 | if (class_create_file(bt_class, &class_attr_sco) < 0) |
969 | BT_ERR("Failed to create SCO info file"); | |
1da177e4 LT |
970 | |
971 | BT_INFO("SCO (Voice Link) ver %s", VERSION); | |
972 | BT_INFO("SCO socket layer initialized"); | |
973 | ||
974 | return 0; | |
975 | ||
976 | error: | |
977 | proto_unregister(&sco_proto); | |
978 | return err; | |
979 | } | |
980 | ||
981 | static void __exit sco_exit(void) | |
982 | { | |
a91f2e39 | 983 | class_remove_file(bt_class, &class_attr_sco); |
1da177e4 LT |
984 | |
985 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
986 | BT_ERR("SCO socket unregistration failed"); | |
987 | ||
988 | if (hci_unregister_proto(&sco_hci_proto) < 0) | |
989 | BT_ERR("SCO protocol unregistration failed"); | |
990 | ||
991 | proto_unregister(&sco_proto); | |
992 | } | |
993 | ||
994 | module_init(sco_init); | |
995 | module_exit(sco_exit); | |
996 | ||
997 | MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>"); | |
998 | MODULE_DESCRIPTION("Bluetooth SCO ver " VERSION); | |
999 | MODULE_VERSION(VERSION); | |
1000 | MODULE_LICENSE("GPL"); | |
1001 | MODULE_ALIAS("bt-proto-2"); |