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 | ||
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 = { | |
61 | .lock = RW_LOCK_UNLOCKED | |
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 | ||
100 | static void sco_sock_init_timer(struct sock *sk) | |
101 | { | |
102 | init_timer(&sk->sk_timer); | |
103 | sk->sk_timer.function = sco_sock_timeout; | |
104 | sk->sk_timer.data = (unsigned long)sk; | |
105 | } | |
106 | ||
107 | /* ---- SCO connections ---- */ | |
108 | static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status) | |
109 | { | |
110 | struct hci_dev *hdev = hcon->hdev; | |
25ea6db0 | 111 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 | 112 | |
25ea6db0 | 113 | if (conn || status) |
1da177e4 LT |
114 | return conn; |
115 | ||
25ea6db0 MH |
116 | conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC); |
117 | if (!conn) | |
1da177e4 | 118 | return NULL; |
1da177e4 LT |
119 | |
120 | spin_lock_init(&conn->lock); | |
121 | ||
122 | hcon->sco_data = conn; | |
123 | conn->hcon = hcon; | |
124 | ||
125 | conn->src = &hdev->bdaddr; | |
126 | conn->dst = &hcon->dst; | |
127 | ||
128 | if (hdev->sco_mtu > 0) | |
129 | conn->mtu = hdev->sco_mtu; | |
130 | else | |
131 | conn->mtu = 60; | |
132 | ||
133 | BT_DBG("hcon %p conn %p", hcon, conn); | |
25ea6db0 | 134 | |
1da177e4 LT |
135 | return conn; |
136 | } | |
137 | ||
138 | static inline struct sock *sco_chan_get(struct sco_conn *conn) | |
139 | { | |
140 | struct sock *sk = NULL; | |
141 | sco_conn_lock(conn); | |
142 | sk = conn->sk; | |
143 | sco_conn_unlock(conn); | |
144 | return sk; | |
145 | } | |
146 | ||
147 | static int sco_conn_del(struct hci_conn *hcon, int err) | |
148 | { | |
149 | struct sco_conn *conn; | |
150 | struct sock *sk; | |
151 | ||
8e87d142 | 152 | if (!(conn = hcon->sco_data)) |
1da177e4 LT |
153 | return 0; |
154 | ||
155 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
156 | ||
157 | /* Kill socket */ | |
158 | if ((sk = sco_chan_get(conn))) { | |
159 | bh_lock_sock(sk); | |
160 | sco_sock_clear_timer(sk); | |
161 | sco_chan_del(sk, err); | |
162 | bh_unlock_sock(sk); | |
163 | sco_sock_kill(sk); | |
164 | } | |
165 | ||
166 | hcon->sco_data = NULL; | |
167 | kfree(conn); | |
168 | return 0; | |
169 | } | |
170 | ||
171 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
172 | { | |
173 | int err = 0; | |
174 | ||
175 | sco_conn_lock(conn); | |
176 | if (conn->sk) { | |
177 | err = -EBUSY; | |
178 | } else { | |
179 | __sco_chan_add(conn, sk, parent); | |
180 | } | |
181 | sco_conn_unlock(conn); | |
182 | return err; | |
183 | } | |
184 | ||
185 | static int sco_connect(struct sock *sk) | |
186 | { | |
187 | bdaddr_t *src = &bt_sk(sk)->src; | |
188 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
189 | struct sco_conn *conn; | |
190 | struct hci_conn *hcon; | |
191 | struct hci_dev *hdev; | |
192 | int err = 0; | |
193 | ||
194 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
195 | ||
196 | if (!(hdev = hci_get_route(dst, src))) | |
197 | return -EHOSTUNREACH; | |
198 | ||
199 | hci_dev_lock_bh(hdev); | |
200 | ||
201 | err = -ENOMEM; | |
202 | ||
203 | hcon = hci_connect(hdev, SCO_LINK, dst); | |
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 | } | |
227 | done: | |
228 | hci_dev_unlock_bh(hdev); | |
229 | hci_dev_put(hdev); | |
230 | return err; | |
231 | } | |
232 | ||
233 | static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) | |
234 | { | |
235 | struct sco_conn *conn = sco_pi(sk)->conn; | |
236 | struct sk_buff *skb; | |
237 | int err, count; | |
238 | ||
239 | /* Check outgoing MTU */ | |
240 | if (len > conn->mtu) | |
241 | return -EINVAL; | |
242 | ||
243 | BT_DBG("sk %p len %d", sk, len); | |
244 | ||
245 | count = min_t(unsigned int, conn->mtu, len); | |
246 | if (!(skb = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err))) | |
247 | return err; | |
248 | ||
249 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
250 | err = -EFAULT; | |
251 | goto fail; | |
252 | } | |
253 | ||
254 | if ((err = hci_send_sco(conn->hcon, skb)) < 0) | |
cdee5751 | 255 | return err; |
1da177e4 LT |
256 | |
257 | return count; | |
258 | ||
259 | fail: | |
260 | kfree_skb(skb); | |
261 | return err; | |
262 | } | |
263 | ||
264 | static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) | |
265 | { | |
266 | struct sock *sk = sco_chan_get(conn); | |
267 | ||
268 | if (!sk) | |
269 | goto drop; | |
270 | ||
271 | BT_DBG("sk %p len %d", sk, skb->len); | |
272 | ||
273 | if (sk->sk_state != BT_CONNECTED) | |
274 | goto drop; | |
275 | ||
276 | if (!sock_queue_rcv_skb(sk, skb)) | |
277 | return; | |
278 | ||
279 | drop: | |
280 | kfree_skb(skb); | |
281 | return; | |
282 | } | |
283 | ||
284 | /* -------- Socket interface ---------- */ | |
285 | static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba) | |
286 | { | |
287 | struct sock *sk; | |
288 | struct hlist_node *node; | |
289 | ||
290 | sk_for_each(sk, node, &sco_sk_list.head) | |
291 | if (!bacmp(&bt_sk(sk)->src, ba)) | |
292 | goto found; | |
293 | sk = NULL; | |
294 | found: | |
295 | return sk; | |
296 | } | |
297 | ||
298 | /* Find socket listening on source bdaddr. | |
299 | * Returns closest match. | |
300 | */ | |
301 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
302 | { | |
303 | struct sock *sk = NULL, *sk1 = NULL; | |
304 | struct hlist_node *node; | |
305 | ||
306 | read_lock(&sco_sk_list.lock); | |
307 | ||
308 | sk_for_each(sk, node, &sco_sk_list.head) { | |
309 | if (sk->sk_state != BT_LISTEN) | |
310 | continue; | |
311 | ||
312 | /* Exact match. */ | |
313 | if (!bacmp(&bt_sk(sk)->src, src)) | |
314 | break; | |
315 | ||
316 | /* Closest match */ | |
317 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
318 | sk1 = sk; | |
319 | } | |
320 | ||
321 | read_unlock(&sco_sk_list.lock); | |
322 | ||
323 | return node ? sk : sk1; | |
324 | } | |
325 | ||
326 | static void sco_sock_destruct(struct sock *sk) | |
327 | { | |
328 | BT_DBG("sk %p", sk); | |
329 | ||
330 | skb_queue_purge(&sk->sk_receive_queue); | |
331 | skb_queue_purge(&sk->sk_write_queue); | |
332 | } | |
333 | ||
334 | static void sco_sock_cleanup_listen(struct sock *parent) | |
335 | { | |
336 | struct sock *sk; | |
337 | ||
338 | BT_DBG("parent %p", parent); | |
339 | ||
340 | /* Close not yet accepted channels */ | |
341 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
342 | sco_sock_close(sk); | |
343 | sco_sock_kill(sk); | |
344 | } | |
345 | ||
346 | parent->sk_state = BT_CLOSED; | |
347 | sock_set_flag(parent, SOCK_ZAPPED); | |
348 | } | |
349 | ||
350 | /* Kill socket (only if zapped and orphan) | |
351 | * Must be called on unlocked socket. | |
352 | */ | |
353 | static void sco_sock_kill(struct sock *sk) | |
354 | { | |
355 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
356 | return; | |
357 | ||
358 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
359 | ||
360 | /* Kill poor orphan */ | |
361 | bt_sock_unlink(&sco_sk_list, sk); | |
362 | sock_set_flag(sk, SOCK_DEAD); | |
363 | sock_put(sk); | |
364 | } | |
365 | ||
366 | /* Close socket. | |
367 | * Must be called on unlocked socket. | |
368 | */ | |
369 | static void sco_sock_close(struct sock *sk) | |
370 | { | |
371 | struct sco_conn *conn; | |
372 | ||
373 | sco_sock_clear_timer(sk); | |
374 | ||
375 | lock_sock(sk); | |
376 | ||
377 | conn = sco_pi(sk)->conn; | |
378 | ||
379 | BT_DBG("sk %p state %d conn %p socket %p", sk, sk->sk_state, conn, sk->sk_socket); | |
380 | ||
381 | switch (sk->sk_state) { | |
382 | case BT_LISTEN: | |
383 | sco_sock_cleanup_listen(sk); | |
384 | break; | |
385 | ||
386 | case BT_CONNECTED: | |
387 | case BT_CONFIG: | |
388 | case BT_CONNECT: | |
389 | case BT_DISCONN: | |
390 | sco_chan_del(sk, ECONNRESET); | |
391 | break; | |
392 | ||
393 | default: | |
394 | sock_set_flag(sk, SOCK_ZAPPED); | |
395 | break; | |
396 | }; | |
397 | ||
398 | release_sock(sk); | |
399 | ||
400 | sco_sock_kill(sk); | |
401 | } | |
402 | ||
403 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
404 | { | |
405 | BT_DBG("sk %p", sk); | |
406 | ||
8e87d142 | 407 | if (parent) |
1da177e4 LT |
408 | sk->sk_type = parent->sk_type; |
409 | } | |
410 | ||
411 | static struct proto sco_proto = { | |
412 | .name = "SCO", | |
413 | .owner = THIS_MODULE, | |
414 | .obj_size = sizeof(struct sco_pinfo) | |
415 | }; | |
416 | ||
dd0fc66f | 417 | static struct sock *sco_sock_alloc(struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
418 | { |
419 | struct sock *sk; | |
420 | ||
421 | sk = sk_alloc(PF_BLUETOOTH, prio, &sco_proto, 1); | |
422 | if (!sk) | |
423 | return NULL; | |
424 | ||
425 | sock_init_data(sock, sk); | |
426 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
427 | ||
428 | sk->sk_destruct = sco_sock_destruct; | |
429 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
430 | ||
431 | sock_reset_flag(sk, SOCK_ZAPPED); | |
432 | ||
433 | sk->sk_protocol = proto; | |
434 | sk->sk_state = BT_OPEN; | |
435 | ||
436 | sco_sock_init_timer(sk); | |
437 | ||
438 | bt_sock_link(&sco_sk_list, sk); | |
439 | return sk; | |
440 | } | |
441 | ||
442 | static int sco_sock_create(struct socket *sock, int protocol) | |
443 | { | |
444 | struct sock *sk; | |
445 | ||
446 | BT_DBG("sock %p", sock); | |
447 | ||
448 | sock->state = SS_UNCONNECTED; | |
449 | ||
450 | if (sock->type != SOCK_SEQPACKET) | |
451 | return -ESOCKTNOSUPPORT; | |
452 | ||
453 | sock->ops = &sco_sock_ops; | |
454 | ||
74da626a MH |
455 | sk = sco_sock_alloc(sock, protocol, GFP_ATOMIC); |
456 | if (!sk) | |
1da177e4 LT |
457 | return -ENOMEM; |
458 | ||
459 | sco_sock_init(sk, NULL); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
464 | { | |
465 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
466 | struct sock *sk = sock->sk; | |
467 | bdaddr_t *src = &sa->sco_bdaddr; | |
468 | int err = 0; | |
469 | ||
470 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
471 | ||
472 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
473 | return -EINVAL; | |
474 | ||
475 | lock_sock(sk); | |
476 | ||
477 | if (sk->sk_state != BT_OPEN) { | |
478 | err = -EBADFD; | |
479 | goto done; | |
480 | } | |
481 | ||
482 | write_lock_bh(&sco_sk_list.lock); | |
483 | ||
484 | if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) { | |
485 | err = -EADDRINUSE; | |
486 | } else { | |
487 | /* Save source address */ | |
488 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); | |
489 | sk->sk_state = BT_BOUND; | |
490 | } | |
491 | ||
492 | write_unlock_bh(&sco_sk_list.lock); | |
493 | ||
494 | done: | |
495 | release_sock(sk); | |
496 | return err; | |
497 | } | |
498 | ||
499 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
500 | { | |
501 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
502 | struct sock *sk = sock->sk; | |
503 | int err = 0; | |
504 | ||
505 | ||
506 | BT_DBG("sk %p", sk); | |
507 | ||
508 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_sco)) | |
509 | return -EINVAL; | |
510 | ||
511 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
512 | return -EBADFD; | |
513 | ||
514 | if (sk->sk_type != SOCK_SEQPACKET) | |
515 | return -EINVAL; | |
516 | ||
517 | lock_sock(sk); | |
518 | ||
519 | /* Set destination address and psm */ | |
520 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
521 | ||
522 | if ((err = sco_connect(sk))) | |
523 | goto done; | |
524 | ||
8e87d142 | 525 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
1da177e4 LT |
526 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
527 | ||
528 | done: | |
529 | release_sock(sk); | |
530 | return err; | |
531 | } | |
532 | ||
533 | static int sco_sock_listen(struct socket *sock, int backlog) | |
534 | { | |
535 | struct sock *sk = sock->sk; | |
536 | int err = 0; | |
537 | ||
538 | BT_DBG("sk %p backlog %d", sk, backlog); | |
539 | ||
540 | lock_sock(sk); | |
541 | ||
542 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
543 | err = -EBADFD; | |
544 | goto done; | |
545 | } | |
546 | ||
547 | sk->sk_max_ack_backlog = backlog; | |
548 | sk->sk_ack_backlog = 0; | |
549 | sk->sk_state = BT_LISTEN; | |
550 | ||
551 | done: | |
552 | release_sock(sk); | |
553 | return err; | |
554 | } | |
555 | ||
556 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
557 | { | |
558 | DECLARE_WAITQUEUE(wait, current); | |
559 | struct sock *sk = sock->sk, *ch; | |
560 | long timeo; | |
561 | int err = 0; | |
562 | ||
563 | lock_sock(sk); | |
564 | ||
565 | if (sk->sk_state != BT_LISTEN) { | |
566 | err = -EBADFD; | |
567 | goto done; | |
568 | } | |
569 | ||
570 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
571 | ||
572 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
573 | ||
574 | /* Wait for an incoming connection. (wake-one). */ | |
575 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
576 | while (!(ch = bt_accept_dequeue(sk, newsock))) { | |
577 | set_current_state(TASK_INTERRUPTIBLE); | |
578 | if (!timeo) { | |
579 | err = -EAGAIN; | |
580 | break; | |
581 | } | |
582 | ||
583 | release_sock(sk); | |
584 | timeo = schedule_timeout(timeo); | |
585 | lock_sock(sk); | |
586 | ||
587 | if (sk->sk_state != BT_LISTEN) { | |
588 | err = -EBADFD; | |
589 | break; | |
590 | } | |
591 | ||
592 | if (signal_pending(current)) { | |
593 | err = sock_intr_errno(timeo); | |
594 | break; | |
595 | } | |
596 | } | |
597 | set_current_state(TASK_RUNNING); | |
598 | remove_wait_queue(sk->sk_sleep, &wait); | |
599 | ||
600 | if (err) | |
601 | goto done; | |
602 | ||
603 | newsock->state = SS_CONNECTED; | |
604 | ||
605 | BT_DBG("new socket %p", ch); | |
606 | ||
607 | done: | |
608 | release_sock(sk); | |
609 | return err; | |
610 | } | |
611 | ||
612 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
613 | { | |
614 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
615 | struct sock *sk = sock->sk; | |
616 | ||
617 | BT_DBG("sock %p, sk %p", sock, sk); | |
618 | ||
619 | addr->sa_family = AF_BLUETOOTH; | |
620 | *len = sizeof(struct sockaddr_sco); | |
621 | ||
622 | if (peer) | |
623 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
624 | else | |
625 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
626 | ||
627 | return 0; | |
628 | } | |
629 | ||
8e87d142 | 630 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
631 | struct msghdr *msg, size_t len) |
632 | { | |
633 | struct sock *sk = sock->sk; | |
634 | int err = 0; | |
635 | ||
636 | BT_DBG("sock %p, sk %p", sock, sk); | |
637 | ||
c1cbe4b7 BL |
638 | err = sock_error(sk); |
639 | if (err) | |
640 | return err; | |
1da177e4 LT |
641 | |
642 | if (msg->msg_flags & MSG_OOB) | |
643 | return -EOPNOTSUPP; | |
644 | ||
645 | lock_sock(sk); | |
646 | ||
647 | if (sk->sk_state == BT_CONNECTED) | |
648 | err = sco_send_frame(sk, msg, len); | |
649 | else | |
650 | err = -ENOTCONN; | |
651 | ||
652 | release_sock(sk); | |
653 | return err; | |
654 | } | |
655 | ||
656 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) | |
657 | { | |
658 | struct sock *sk = sock->sk; | |
659 | int err = 0; | |
660 | ||
661 | BT_DBG("sk %p", sk); | |
662 | ||
663 | lock_sock(sk); | |
664 | ||
665 | switch (optname) { | |
666 | default: | |
667 | err = -ENOPROTOOPT; | |
668 | break; | |
669 | } | |
670 | ||
671 | release_sock(sk); | |
672 | return err; | |
673 | } | |
674 | ||
675 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
676 | { | |
677 | struct sock *sk = sock->sk; | |
678 | struct sco_options opts; | |
679 | struct sco_conninfo cinfo; | |
8e87d142 | 680 | int len, err = 0; |
1da177e4 LT |
681 | |
682 | BT_DBG("sk %p", sk); | |
683 | ||
684 | if (get_user(len, optlen)) | |
685 | return -EFAULT; | |
686 | ||
687 | lock_sock(sk); | |
688 | ||
689 | switch (optname) { | |
690 | case SCO_OPTIONS: | |
691 | if (sk->sk_state != BT_CONNECTED) { | |
692 | err = -ENOTCONN; | |
693 | break; | |
694 | } | |
695 | ||
696 | opts.mtu = sco_pi(sk)->conn->mtu; | |
697 | ||
698 | BT_DBG("mtu %d", opts.mtu); | |
699 | ||
700 | len = min_t(unsigned int, len, sizeof(opts)); | |
701 | if (copy_to_user(optval, (char *)&opts, len)) | |
702 | err = -EFAULT; | |
703 | ||
704 | break; | |
705 | ||
706 | case SCO_CONNINFO: | |
707 | if (sk->sk_state != BT_CONNECTED) { | |
708 | err = -ENOTCONN; | |
709 | break; | |
710 | } | |
711 | ||
712 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; | |
713 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
714 | ||
715 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
716 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
717 | err = -EFAULT; | |
718 | ||
719 | break; | |
720 | ||
721 | default: | |
722 | err = -ENOPROTOOPT; | |
723 | break; | |
724 | } | |
725 | ||
726 | release_sock(sk); | |
727 | return err; | |
728 | } | |
729 | ||
730 | static int sco_sock_release(struct socket *sock) | |
731 | { | |
732 | struct sock *sk = sock->sk; | |
733 | int err = 0; | |
734 | ||
735 | BT_DBG("sock %p, sk %p", sock, sk); | |
736 | ||
737 | if (!sk) | |
738 | return 0; | |
739 | ||
740 | sco_sock_close(sk); | |
741 | ||
742 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
743 | lock_sock(sk); | |
744 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
745 | release_sock(sk); | |
746 | } | |
747 | ||
748 | sock_orphan(sk); | |
749 | sco_sock_kill(sk); | |
750 | return err; | |
751 | } | |
752 | ||
753 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
754 | { | |
755 | BT_DBG("conn %p", conn); | |
756 | ||
757 | sco_pi(sk)->conn = conn; | |
758 | conn->sk = sk; | |
759 | ||
760 | if (parent) | |
761 | bt_accept_enqueue(parent, sk); | |
762 | } | |
763 | ||
8e87d142 | 764 | /* Delete channel. |
1da177e4 LT |
765 | * Must be called on the locked socket. */ |
766 | static void sco_chan_del(struct sock *sk, int err) | |
767 | { | |
768 | struct sco_conn *conn; | |
769 | ||
770 | conn = sco_pi(sk)->conn; | |
771 | ||
772 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
773 | ||
8e87d142 | 774 | if (conn) { |
1da177e4 LT |
775 | sco_conn_lock(conn); |
776 | conn->sk = NULL; | |
777 | sco_pi(sk)->conn = NULL; | |
778 | sco_conn_unlock(conn); | |
779 | hci_conn_put(conn->hcon); | |
780 | } | |
781 | ||
782 | sk->sk_state = BT_CLOSED; | |
783 | sk->sk_err = err; | |
784 | sk->sk_state_change(sk); | |
785 | ||
786 | sock_set_flag(sk, SOCK_ZAPPED); | |
787 | } | |
788 | ||
789 | static void sco_conn_ready(struct sco_conn *conn) | |
790 | { | |
791 | struct sock *parent, *sk; | |
792 | ||
793 | BT_DBG("conn %p", conn); | |
794 | ||
795 | sco_conn_lock(conn); | |
796 | ||
797 | if ((sk = conn->sk)) { | |
798 | sco_sock_clear_timer(sk); | |
799 | bh_lock_sock(sk); | |
800 | sk->sk_state = BT_CONNECTED; | |
801 | sk->sk_state_change(sk); | |
802 | bh_unlock_sock(sk); | |
803 | } else { | |
804 | parent = sco_get_sock_listen(conn->src); | |
805 | if (!parent) | |
806 | goto done; | |
807 | ||
808 | bh_lock_sock(parent); | |
809 | ||
810 | sk = sco_sock_alloc(NULL, BTPROTO_SCO, GFP_ATOMIC); | |
811 | if (!sk) { | |
812 | bh_unlock_sock(parent); | |
813 | goto done; | |
814 | } | |
815 | ||
816 | sco_sock_init(sk, parent); | |
817 | ||
818 | bacpy(&bt_sk(sk)->src, conn->src); | |
819 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
820 | ||
821 | hci_conn_hold(conn->hcon); | |
822 | __sco_chan_add(conn, sk, parent); | |
823 | ||
824 | sk->sk_state = BT_CONNECTED; | |
825 | ||
826 | /* Wake up parent */ | |
827 | parent->sk_data_ready(parent, 1); | |
828 | ||
829 | bh_unlock_sock(parent); | |
830 | } | |
831 | ||
832 | done: | |
833 | sco_conn_unlock(conn); | |
834 | } | |
835 | ||
836 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
837 | static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type) | |
838 | { | |
839 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
840 | ||
841 | /* Always accept connection */ | |
842 | return HCI_LM_ACCEPT; | |
843 | } | |
844 | ||
845 | static int sco_connect_cfm(struct hci_conn *hcon, __u8 status) | |
846 | { | |
847 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
848 | ||
849 | if (hcon->type != SCO_LINK) | |
850 | return 0; | |
851 | ||
852 | if (!status) { | |
853 | struct sco_conn *conn; | |
854 | ||
855 | conn = sco_conn_add(hcon, status); | |
856 | if (conn) | |
857 | sco_conn_ready(conn); | |
8e87d142 | 858 | } else |
1da177e4 LT |
859 | sco_conn_del(hcon, bt_err(status)); |
860 | ||
861 | return 0; | |
862 | } | |
863 | ||
864 | static int sco_disconn_ind(struct hci_conn *hcon, __u8 reason) | |
865 | { | |
866 | BT_DBG("hcon %p reason %d", hcon, reason); | |
867 | ||
868 | if (hcon->type != SCO_LINK) | |
869 | return 0; | |
870 | ||
871 | sco_conn_del(hcon, bt_err(reason)); | |
872 | return 0; | |
873 | } | |
874 | ||
875 | static int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) | |
876 | { | |
877 | struct sco_conn *conn = hcon->sco_data; | |
878 | ||
879 | if (!conn) | |
880 | goto drop; | |
881 | ||
882 | BT_DBG("conn %p len %d", conn, skb->len); | |
883 | ||
884 | if (skb->len) { | |
885 | sco_recv_frame(conn, skb); | |
886 | return 0; | |
887 | } | |
888 | ||
889 | drop: | |
8e87d142 | 890 | kfree_skb(skb); |
1da177e4 LT |
891 | return 0; |
892 | } | |
893 | ||
be9d1227 | 894 | static ssize_t sco_sysfs_show(struct class *dev, char *buf) |
1da177e4 LT |
895 | { |
896 | struct sock *sk; | |
897 | struct hlist_node *node; | |
be9d1227 | 898 | char *str = buf; |
1da177e4 LT |
899 | |
900 | read_lock_bh(&sco_sk_list.lock); | |
901 | ||
be9d1227 MH |
902 | sk_for_each(sk, node, &sco_sk_list.head) { |
903 | str += sprintf(str, "%s %s %d\n", | |
904 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), | |
905 | sk->sk_state); | |
906 | } | |
1da177e4 | 907 | |
1da177e4 | 908 | read_unlock_bh(&sco_sk_list.lock); |
1da177e4 | 909 | |
be9d1227 | 910 | return (str - buf); |
1da177e4 LT |
911 | } |
912 | ||
be9d1227 | 913 | static CLASS_ATTR(sco, S_IRUGO, sco_sysfs_show, NULL); |
1da177e4 | 914 | |
90ddc4f0 | 915 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
916 | .family = PF_BLUETOOTH, |
917 | .owner = THIS_MODULE, | |
918 | .release = sco_sock_release, | |
919 | .bind = sco_sock_bind, | |
920 | .connect = sco_sock_connect, | |
921 | .listen = sco_sock_listen, | |
922 | .accept = sco_sock_accept, | |
923 | .getname = sco_sock_getname, | |
924 | .sendmsg = sco_sock_sendmsg, | |
925 | .recvmsg = bt_sock_recvmsg, | |
926 | .poll = bt_sock_poll, | |
927 | .ioctl = sock_no_ioctl, | |
928 | .mmap = sock_no_mmap, | |
929 | .socketpair = sock_no_socketpair, | |
930 | .shutdown = sock_no_shutdown, | |
931 | .setsockopt = sco_sock_setsockopt, | |
932 | .getsockopt = sco_sock_getsockopt | |
933 | }; | |
934 | ||
935 | static struct net_proto_family sco_sock_family_ops = { | |
936 | .family = PF_BLUETOOTH, | |
937 | .owner = THIS_MODULE, | |
938 | .create = sco_sock_create, | |
939 | }; | |
940 | ||
941 | static struct hci_proto sco_hci_proto = { | |
942 | .name = "SCO", | |
943 | .id = HCI_PROTO_SCO, | |
944 | .connect_ind = sco_connect_ind, | |
945 | .connect_cfm = sco_connect_cfm, | |
946 | .disconn_ind = sco_disconn_ind, | |
947 | .recv_scodata = sco_recv_scodata | |
948 | }; | |
949 | ||
950 | static int __init sco_init(void) | |
951 | { | |
952 | int err; | |
953 | ||
954 | err = proto_register(&sco_proto, 0); | |
955 | if (err < 0) | |
956 | return err; | |
957 | ||
958 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
959 | if (err < 0) { | |
960 | BT_ERR("SCO socket registration failed"); | |
961 | goto error; | |
962 | } | |
963 | ||
964 | err = hci_register_proto(&sco_hci_proto); | |
965 | if (err < 0) { | |
966 | BT_ERR("SCO protocol registration failed"); | |
967 | bt_sock_unregister(BTPROTO_SCO); | |
968 | goto error; | |
969 | } | |
970 | ||
df5c37ea MH |
971 | if (class_create_file(bt_class, &class_attr_sco) < 0) |
972 | BT_ERR("Failed to create SCO info file"); | |
1da177e4 LT |
973 | |
974 | BT_INFO("SCO (Voice Link) ver %s", VERSION); | |
975 | BT_INFO("SCO socket layer initialized"); | |
976 | ||
977 | return 0; | |
978 | ||
979 | error: | |
980 | proto_unregister(&sco_proto); | |
981 | return err; | |
982 | } | |
983 | ||
984 | static void __exit sco_exit(void) | |
985 | { | |
a91f2e39 | 986 | class_remove_file(bt_class, &class_attr_sco); |
1da177e4 LT |
987 | |
988 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
989 | BT_ERR("SCO socket unregistration failed"); | |
990 | ||
991 | if (hci_unregister_proto(&sco_hci_proto) < 0) | |
992 | BT_ERR("SCO protocol unregistration failed"); | |
993 | ||
994 | proto_unregister(&sco_proto); | |
995 | } | |
996 | ||
997 | module_init(sco_init); | |
998 | module_exit(sco_exit); | |
999 | ||
1000 | MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>"); | |
1001 | MODULE_DESCRIPTION("Bluetooth SCO ver " VERSION); | |
1002 | MODULE_VERSION(VERSION); | |
1003 | MODULE_LICENSE("GPL"); | |
1004 | MODULE_ALIAS("bt-proto-2"); |