Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
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 | |
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 | |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
19 | ||
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
22 | SOFTWARE IS DISCLAIMED. | |
23 | */ | |
24 | ||
25 | /* Bluetooth SCO sockets. */ | |
26 | ||
27 | #include <linux/config.h> | |
28 | #include <linux/module.h> | |
29 | ||
30 | #include <linux/types.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/kernel.h> | |
1da177e4 LT |
33 | #include <linux/sched.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/fcntl.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/socket.h> | |
40 | #include <linux/skbuff.h> | |
be9d1227 | 41 | #include <linux/device.h> |
1da177e4 LT |
42 | #include <linux/list.h> |
43 | #include <net/sock.h> | |
44 | ||
45 | #include <asm/system.h> | |
46 | #include <asm/uaccess.h> | |
47 | ||
48 | #include <net/bluetooth/bluetooth.h> | |
49 | #include <net/bluetooth/hci_core.h> | |
50 | #include <net/bluetooth/sco.h> | |
51 | ||
52 | #ifndef CONFIG_BT_SCO_DEBUG | |
53 | #undef BT_DBG | |
54 | #define BT_DBG(D...) | |
55 | #endif | |
56 | ||
be9d1227 | 57 | #define VERSION "0.5" |
1da177e4 | 58 | |
90ddc4f0 | 59 | static const struct proto_ops sco_sock_ops; |
1da177e4 LT |
60 | |
61 | static struct bt_sock_list sco_sk_list = { | |
62 | .lock = RW_LOCK_UNLOCKED | |
63 | }; | |
64 | ||
65 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent); | |
66 | static void sco_chan_del(struct sock *sk, int err); | |
67 | ||
68 | static int sco_conn_del(struct hci_conn *conn, int err); | |
69 | ||
70 | static void sco_sock_close(struct sock *sk); | |
71 | static void sco_sock_kill(struct sock *sk); | |
72 | ||
73 | /* ---- SCO timers ---- */ | |
74 | static void sco_sock_timeout(unsigned long arg) | |
75 | { | |
76 | struct sock *sk = (struct sock *) arg; | |
77 | ||
78 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
79 | ||
80 | bh_lock_sock(sk); | |
81 | sk->sk_err = ETIMEDOUT; | |
82 | sk->sk_state_change(sk); | |
83 | bh_unlock_sock(sk); | |
84 | ||
85 | sco_sock_kill(sk); | |
86 | sock_put(sk); | |
87 | } | |
88 | ||
89 | static void sco_sock_set_timer(struct sock *sk, long timeout) | |
90 | { | |
91 | BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
92 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
93 | } | |
94 | ||
95 | static void sco_sock_clear_timer(struct sock *sk) | |
96 | { | |
97 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
98 | sk_stop_timer(sk, &sk->sk_timer); | |
99 | } | |
100 | ||
101 | static void sco_sock_init_timer(struct sock *sk) | |
102 | { | |
103 | init_timer(&sk->sk_timer); | |
104 | sk->sk_timer.function = sco_sock_timeout; | |
105 | sk->sk_timer.data = (unsigned long)sk; | |
106 | } | |
107 | ||
108 | /* ---- SCO connections ---- */ | |
109 | static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status) | |
110 | { | |
111 | struct hci_dev *hdev = hcon->hdev; | |
112 | struct sco_conn *conn; | |
113 | ||
114 | if ((conn = hcon->sco_data)) | |
115 | return conn; | |
116 | ||
117 | if (status) | |
118 | return conn; | |
119 | ||
120 | if (!(conn = kmalloc(sizeof(struct sco_conn), GFP_ATOMIC))) | |
121 | return NULL; | |
122 | memset(conn, 0, sizeof(struct sco_conn)); | |
123 | ||
124 | spin_lock_init(&conn->lock); | |
125 | ||
126 | hcon->sco_data = conn; | |
127 | conn->hcon = hcon; | |
128 | ||
129 | conn->src = &hdev->bdaddr; | |
130 | conn->dst = &hcon->dst; | |
131 | ||
132 | if (hdev->sco_mtu > 0) | |
133 | conn->mtu = hdev->sco_mtu; | |
134 | else | |
135 | conn->mtu = 60; | |
136 | ||
137 | BT_DBG("hcon %p conn %p", hcon, conn); | |
138 | return conn; | |
139 | } | |
140 | ||
141 | static inline struct sock *sco_chan_get(struct sco_conn *conn) | |
142 | { | |
143 | struct sock *sk = NULL; | |
144 | sco_conn_lock(conn); | |
145 | sk = conn->sk; | |
146 | sco_conn_unlock(conn); | |
147 | return sk; | |
148 | } | |
149 | ||
150 | static int sco_conn_del(struct hci_conn *hcon, int err) | |
151 | { | |
152 | struct sco_conn *conn; | |
153 | struct sock *sk; | |
154 | ||
155 | if (!(conn = hcon->sco_data)) | |
156 | return 0; | |
157 | ||
158 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
159 | ||
160 | /* Kill socket */ | |
161 | if ((sk = sco_chan_get(conn))) { | |
162 | bh_lock_sock(sk); | |
163 | sco_sock_clear_timer(sk); | |
164 | sco_chan_del(sk, err); | |
165 | bh_unlock_sock(sk); | |
166 | sco_sock_kill(sk); | |
167 | } | |
168 | ||
169 | hcon->sco_data = NULL; | |
170 | kfree(conn); | |
171 | return 0; | |
172 | } | |
173 | ||
174 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
175 | { | |
176 | int err = 0; | |
177 | ||
178 | sco_conn_lock(conn); | |
179 | if (conn->sk) { | |
180 | err = -EBUSY; | |
181 | } else { | |
182 | __sco_chan_add(conn, sk, parent); | |
183 | } | |
184 | sco_conn_unlock(conn); | |
185 | return err; | |
186 | } | |
187 | ||
188 | static int sco_connect(struct sock *sk) | |
189 | { | |
190 | bdaddr_t *src = &bt_sk(sk)->src; | |
191 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
192 | struct sco_conn *conn; | |
193 | struct hci_conn *hcon; | |
194 | struct hci_dev *hdev; | |
195 | int err = 0; | |
196 | ||
197 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
198 | ||
199 | if (!(hdev = hci_get_route(dst, src))) | |
200 | return -EHOSTUNREACH; | |
201 | ||
202 | hci_dev_lock_bh(hdev); | |
203 | ||
204 | err = -ENOMEM; | |
205 | ||
206 | hcon = hci_connect(hdev, SCO_LINK, dst); | |
207 | if (!hcon) | |
208 | goto done; | |
209 | ||
210 | conn = sco_conn_add(hcon, 0); | |
211 | if (!conn) { | |
212 | hci_conn_put(hcon); | |
213 | goto done; | |
214 | } | |
215 | ||
216 | /* Update source addr of the socket */ | |
217 | bacpy(src, conn->src); | |
218 | ||
219 | err = sco_chan_add(conn, sk, NULL); | |
220 | if (err) | |
221 | goto done; | |
222 | ||
223 | if (hcon->state == BT_CONNECTED) { | |
224 | sco_sock_clear_timer(sk); | |
225 | sk->sk_state = BT_CONNECTED; | |
226 | } else { | |
227 | sk->sk_state = BT_CONNECT; | |
228 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
229 | } | |
230 | done: | |
231 | hci_dev_unlock_bh(hdev); | |
232 | hci_dev_put(hdev); | |
233 | return err; | |
234 | } | |
235 | ||
236 | static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) | |
237 | { | |
238 | struct sco_conn *conn = sco_pi(sk)->conn; | |
239 | struct sk_buff *skb; | |
240 | int err, count; | |
241 | ||
242 | /* Check outgoing MTU */ | |
243 | if (len > conn->mtu) | |
244 | return -EINVAL; | |
245 | ||
246 | BT_DBG("sk %p len %d", sk, len); | |
247 | ||
248 | count = min_t(unsigned int, conn->mtu, len); | |
249 | if (!(skb = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err))) | |
250 | return err; | |
251 | ||
252 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
253 | err = -EFAULT; | |
254 | goto fail; | |
255 | } | |
256 | ||
257 | if ((err = hci_send_sco(conn->hcon, skb)) < 0) | |
cdee5751 | 258 | return err; |
1da177e4 LT |
259 | |
260 | return count; | |
261 | ||
262 | fail: | |
263 | kfree_skb(skb); | |
264 | return err; | |
265 | } | |
266 | ||
267 | static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) | |
268 | { | |
269 | struct sock *sk = sco_chan_get(conn); | |
270 | ||
271 | if (!sk) | |
272 | goto drop; | |
273 | ||
274 | BT_DBG("sk %p len %d", sk, skb->len); | |
275 | ||
276 | if (sk->sk_state != BT_CONNECTED) | |
277 | goto drop; | |
278 | ||
279 | if (!sock_queue_rcv_skb(sk, skb)) | |
280 | return; | |
281 | ||
282 | drop: | |
283 | kfree_skb(skb); | |
284 | return; | |
285 | } | |
286 | ||
287 | /* -------- Socket interface ---------- */ | |
288 | static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba) | |
289 | { | |
290 | struct sock *sk; | |
291 | struct hlist_node *node; | |
292 | ||
293 | sk_for_each(sk, node, &sco_sk_list.head) | |
294 | if (!bacmp(&bt_sk(sk)->src, ba)) | |
295 | goto found; | |
296 | sk = NULL; | |
297 | found: | |
298 | return sk; | |
299 | } | |
300 | ||
301 | /* Find socket listening on source bdaddr. | |
302 | * Returns closest match. | |
303 | */ | |
304 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
305 | { | |
306 | struct sock *sk = NULL, *sk1 = NULL; | |
307 | struct hlist_node *node; | |
308 | ||
309 | read_lock(&sco_sk_list.lock); | |
310 | ||
311 | sk_for_each(sk, node, &sco_sk_list.head) { | |
312 | if (sk->sk_state != BT_LISTEN) | |
313 | continue; | |
314 | ||
315 | /* Exact match. */ | |
316 | if (!bacmp(&bt_sk(sk)->src, src)) | |
317 | break; | |
318 | ||
319 | /* Closest match */ | |
320 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
321 | sk1 = sk; | |
322 | } | |
323 | ||
324 | read_unlock(&sco_sk_list.lock); | |
325 | ||
326 | return node ? sk : sk1; | |
327 | } | |
328 | ||
329 | static void sco_sock_destruct(struct sock *sk) | |
330 | { | |
331 | BT_DBG("sk %p", sk); | |
332 | ||
333 | skb_queue_purge(&sk->sk_receive_queue); | |
334 | skb_queue_purge(&sk->sk_write_queue); | |
335 | } | |
336 | ||
337 | static void sco_sock_cleanup_listen(struct sock *parent) | |
338 | { | |
339 | struct sock *sk; | |
340 | ||
341 | BT_DBG("parent %p", parent); | |
342 | ||
343 | /* Close not yet accepted channels */ | |
344 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
345 | sco_sock_close(sk); | |
346 | sco_sock_kill(sk); | |
347 | } | |
348 | ||
349 | parent->sk_state = BT_CLOSED; | |
350 | sock_set_flag(parent, SOCK_ZAPPED); | |
351 | } | |
352 | ||
353 | /* Kill socket (only if zapped and orphan) | |
354 | * Must be called on unlocked socket. | |
355 | */ | |
356 | static void sco_sock_kill(struct sock *sk) | |
357 | { | |
358 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
359 | return; | |
360 | ||
361 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
362 | ||
363 | /* Kill poor orphan */ | |
364 | bt_sock_unlink(&sco_sk_list, sk); | |
365 | sock_set_flag(sk, SOCK_DEAD); | |
366 | sock_put(sk); | |
367 | } | |
368 | ||
369 | /* Close socket. | |
370 | * Must be called on unlocked socket. | |
371 | */ | |
372 | static void sco_sock_close(struct sock *sk) | |
373 | { | |
374 | struct sco_conn *conn; | |
375 | ||
376 | sco_sock_clear_timer(sk); | |
377 | ||
378 | lock_sock(sk); | |
379 | ||
380 | conn = sco_pi(sk)->conn; | |
381 | ||
382 | BT_DBG("sk %p state %d conn %p socket %p", sk, sk->sk_state, conn, sk->sk_socket); | |
383 | ||
384 | switch (sk->sk_state) { | |
385 | case BT_LISTEN: | |
386 | sco_sock_cleanup_listen(sk); | |
387 | break; | |
388 | ||
389 | case BT_CONNECTED: | |
390 | case BT_CONFIG: | |
391 | case BT_CONNECT: | |
392 | case BT_DISCONN: | |
393 | sco_chan_del(sk, ECONNRESET); | |
394 | break; | |
395 | ||
396 | default: | |
397 | sock_set_flag(sk, SOCK_ZAPPED); | |
398 | break; | |
399 | }; | |
400 | ||
401 | release_sock(sk); | |
402 | ||
403 | sco_sock_kill(sk); | |
404 | } | |
405 | ||
406 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
407 | { | |
408 | BT_DBG("sk %p", sk); | |
409 | ||
410 | if (parent) | |
411 | sk->sk_type = parent->sk_type; | |
412 | } | |
413 | ||
414 | static struct proto sco_proto = { | |
415 | .name = "SCO", | |
416 | .owner = THIS_MODULE, | |
417 | .obj_size = sizeof(struct sco_pinfo) | |
418 | }; | |
419 | ||
dd0fc66f | 420 | static struct sock *sco_sock_alloc(struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
421 | { |
422 | struct sock *sk; | |
423 | ||
424 | sk = sk_alloc(PF_BLUETOOTH, prio, &sco_proto, 1); | |
425 | if (!sk) | |
426 | return NULL; | |
427 | ||
428 | sock_init_data(sock, sk); | |
429 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
430 | ||
431 | sk->sk_destruct = sco_sock_destruct; | |
432 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
433 | ||
434 | sock_reset_flag(sk, SOCK_ZAPPED); | |
435 | ||
436 | sk->sk_protocol = proto; | |
437 | sk->sk_state = BT_OPEN; | |
438 | ||
439 | sco_sock_init_timer(sk); | |
440 | ||
441 | bt_sock_link(&sco_sk_list, sk); | |
442 | return sk; | |
443 | } | |
444 | ||
445 | static int sco_sock_create(struct socket *sock, int protocol) | |
446 | { | |
447 | struct sock *sk; | |
448 | ||
449 | BT_DBG("sock %p", sock); | |
450 | ||
451 | sock->state = SS_UNCONNECTED; | |
452 | ||
453 | if (sock->type != SOCK_SEQPACKET) | |
454 | return -ESOCKTNOSUPPORT; | |
455 | ||
456 | sock->ops = &sco_sock_ops; | |
457 | ||
458 | if (!(sk = sco_sock_alloc(sock, protocol, GFP_KERNEL))) | |
459 | return -ENOMEM; | |
460 | ||
461 | sco_sock_init(sk, NULL); | |
462 | return 0; | |
463 | } | |
464 | ||
465 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
466 | { | |
467 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
468 | struct sock *sk = sock->sk; | |
469 | bdaddr_t *src = &sa->sco_bdaddr; | |
470 | int err = 0; | |
471 | ||
472 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
473 | ||
474 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
475 | return -EINVAL; | |
476 | ||
477 | lock_sock(sk); | |
478 | ||
479 | if (sk->sk_state != BT_OPEN) { | |
480 | err = -EBADFD; | |
481 | goto done; | |
482 | } | |
483 | ||
484 | write_lock_bh(&sco_sk_list.lock); | |
485 | ||
486 | if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) { | |
487 | err = -EADDRINUSE; | |
488 | } else { | |
489 | /* Save source address */ | |
490 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); | |
491 | sk->sk_state = BT_BOUND; | |
492 | } | |
493 | ||
494 | write_unlock_bh(&sco_sk_list.lock); | |
495 | ||
496 | done: | |
497 | release_sock(sk); | |
498 | return err; | |
499 | } | |
500 | ||
501 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
502 | { | |
503 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
504 | struct sock *sk = sock->sk; | |
505 | int err = 0; | |
506 | ||
507 | ||
508 | BT_DBG("sk %p", sk); | |
509 | ||
510 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_sco)) | |
511 | return -EINVAL; | |
512 | ||
513 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
514 | return -EBADFD; | |
515 | ||
516 | if (sk->sk_type != SOCK_SEQPACKET) | |
517 | return -EINVAL; | |
518 | ||
519 | lock_sock(sk); | |
520 | ||
521 | /* Set destination address and psm */ | |
522 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
523 | ||
524 | if ((err = sco_connect(sk))) | |
525 | goto done; | |
526 | ||
527 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
528 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
529 | ||
530 | done: | |
531 | release_sock(sk); | |
532 | return err; | |
533 | } | |
534 | ||
535 | static int sco_sock_listen(struct socket *sock, int backlog) | |
536 | { | |
537 | struct sock *sk = sock->sk; | |
538 | int err = 0; | |
539 | ||
540 | BT_DBG("sk %p backlog %d", sk, backlog); | |
541 | ||
542 | lock_sock(sk); | |
543 | ||
544 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
545 | err = -EBADFD; | |
546 | goto done; | |
547 | } | |
548 | ||
549 | sk->sk_max_ack_backlog = backlog; | |
550 | sk->sk_ack_backlog = 0; | |
551 | sk->sk_state = BT_LISTEN; | |
552 | ||
553 | done: | |
554 | release_sock(sk); | |
555 | return err; | |
556 | } | |
557 | ||
558 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
559 | { | |
560 | DECLARE_WAITQUEUE(wait, current); | |
561 | struct sock *sk = sock->sk, *ch; | |
562 | long timeo; | |
563 | int err = 0; | |
564 | ||
565 | lock_sock(sk); | |
566 | ||
567 | if (sk->sk_state != BT_LISTEN) { | |
568 | err = -EBADFD; | |
569 | goto done; | |
570 | } | |
571 | ||
572 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
573 | ||
574 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
575 | ||
576 | /* Wait for an incoming connection. (wake-one). */ | |
577 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
578 | while (!(ch = bt_accept_dequeue(sk, newsock))) { | |
579 | set_current_state(TASK_INTERRUPTIBLE); | |
580 | if (!timeo) { | |
581 | err = -EAGAIN; | |
582 | break; | |
583 | } | |
584 | ||
585 | release_sock(sk); | |
586 | timeo = schedule_timeout(timeo); | |
587 | lock_sock(sk); | |
588 | ||
589 | if (sk->sk_state != BT_LISTEN) { | |
590 | err = -EBADFD; | |
591 | break; | |
592 | } | |
593 | ||
594 | if (signal_pending(current)) { | |
595 | err = sock_intr_errno(timeo); | |
596 | break; | |
597 | } | |
598 | } | |
599 | set_current_state(TASK_RUNNING); | |
600 | remove_wait_queue(sk->sk_sleep, &wait); | |
601 | ||
602 | if (err) | |
603 | goto done; | |
604 | ||
605 | newsock->state = SS_CONNECTED; | |
606 | ||
607 | BT_DBG("new socket %p", ch); | |
608 | ||
609 | done: | |
610 | release_sock(sk); | |
611 | return err; | |
612 | } | |
613 | ||
614 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
615 | { | |
616 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
617 | struct sock *sk = sock->sk; | |
618 | ||
619 | BT_DBG("sock %p, sk %p", sock, sk); | |
620 | ||
621 | addr->sa_family = AF_BLUETOOTH; | |
622 | *len = sizeof(struct sockaddr_sco); | |
623 | ||
624 | if (peer) | |
625 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
626 | else | |
627 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
632 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, | |
633 | struct msghdr *msg, size_t len) | |
634 | { | |
635 | struct sock *sk = sock->sk; | |
636 | int err = 0; | |
637 | ||
638 | BT_DBG("sock %p, sk %p", sock, sk); | |
639 | ||
c1cbe4b7 BL |
640 | err = sock_error(sk); |
641 | if (err) | |
642 | return err; | |
1da177e4 LT |
643 | |
644 | if (msg->msg_flags & MSG_OOB) | |
645 | return -EOPNOTSUPP; | |
646 | ||
647 | lock_sock(sk); | |
648 | ||
649 | if (sk->sk_state == BT_CONNECTED) | |
650 | err = sco_send_frame(sk, msg, len); | |
651 | else | |
652 | err = -ENOTCONN; | |
653 | ||
654 | release_sock(sk); | |
655 | return err; | |
656 | } | |
657 | ||
658 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) | |
659 | { | |
660 | struct sock *sk = sock->sk; | |
661 | int err = 0; | |
662 | ||
663 | BT_DBG("sk %p", sk); | |
664 | ||
665 | lock_sock(sk); | |
666 | ||
667 | switch (optname) { | |
668 | default: | |
669 | err = -ENOPROTOOPT; | |
670 | break; | |
671 | } | |
672 | ||
673 | release_sock(sk); | |
674 | return err; | |
675 | } | |
676 | ||
677 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
678 | { | |
679 | struct sock *sk = sock->sk; | |
680 | struct sco_options opts; | |
681 | struct sco_conninfo cinfo; | |
682 | int len, err = 0; | |
683 | ||
684 | BT_DBG("sk %p", sk); | |
685 | ||
686 | if (get_user(len, optlen)) | |
687 | return -EFAULT; | |
688 | ||
689 | lock_sock(sk); | |
690 | ||
691 | switch (optname) { | |
692 | case SCO_OPTIONS: | |
693 | if (sk->sk_state != BT_CONNECTED) { | |
694 | err = -ENOTCONN; | |
695 | break; | |
696 | } | |
697 | ||
698 | opts.mtu = sco_pi(sk)->conn->mtu; | |
699 | ||
700 | BT_DBG("mtu %d", opts.mtu); | |
701 | ||
702 | len = min_t(unsigned int, len, sizeof(opts)); | |
703 | if (copy_to_user(optval, (char *)&opts, len)) | |
704 | err = -EFAULT; | |
705 | ||
706 | break; | |
707 | ||
708 | case SCO_CONNINFO: | |
709 | if (sk->sk_state != BT_CONNECTED) { | |
710 | err = -ENOTCONN; | |
711 | break; | |
712 | } | |
713 | ||
714 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; | |
715 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
716 | ||
717 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
718 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
719 | err = -EFAULT; | |
720 | ||
721 | break; | |
722 | ||
723 | default: | |
724 | err = -ENOPROTOOPT; | |
725 | break; | |
726 | } | |
727 | ||
728 | release_sock(sk); | |
729 | return err; | |
730 | } | |
731 | ||
732 | static int sco_sock_release(struct socket *sock) | |
733 | { | |
734 | struct sock *sk = sock->sk; | |
735 | int err = 0; | |
736 | ||
737 | BT_DBG("sock %p, sk %p", sock, sk); | |
738 | ||
739 | if (!sk) | |
740 | return 0; | |
741 | ||
742 | sco_sock_close(sk); | |
743 | ||
744 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
745 | lock_sock(sk); | |
746 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
747 | release_sock(sk); | |
748 | } | |
749 | ||
750 | sock_orphan(sk); | |
751 | sco_sock_kill(sk); | |
752 | return err; | |
753 | } | |
754 | ||
755 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
756 | { | |
757 | BT_DBG("conn %p", conn); | |
758 | ||
759 | sco_pi(sk)->conn = conn; | |
760 | conn->sk = sk; | |
761 | ||
762 | if (parent) | |
763 | bt_accept_enqueue(parent, sk); | |
764 | } | |
765 | ||
766 | /* Delete channel. | |
767 | * Must be called on the locked socket. */ | |
768 | static void sco_chan_del(struct sock *sk, int err) | |
769 | { | |
770 | struct sco_conn *conn; | |
771 | ||
772 | conn = sco_pi(sk)->conn; | |
773 | ||
774 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
775 | ||
776 | if (conn) { | |
777 | sco_conn_lock(conn); | |
778 | conn->sk = NULL; | |
779 | sco_pi(sk)->conn = NULL; | |
780 | sco_conn_unlock(conn); | |
781 | hci_conn_put(conn->hcon); | |
782 | } | |
783 | ||
784 | sk->sk_state = BT_CLOSED; | |
785 | sk->sk_err = err; | |
786 | sk->sk_state_change(sk); | |
787 | ||
788 | sock_set_flag(sk, SOCK_ZAPPED); | |
789 | } | |
790 | ||
791 | static void sco_conn_ready(struct sco_conn *conn) | |
792 | { | |
793 | struct sock *parent, *sk; | |
794 | ||
795 | BT_DBG("conn %p", conn); | |
796 | ||
797 | sco_conn_lock(conn); | |
798 | ||
799 | if ((sk = conn->sk)) { | |
800 | sco_sock_clear_timer(sk); | |
801 | bh_lock_sock(sk); | |
802 | sk->sk_state = BT_CONNECTED; | |
803 | sk->sk_state_change(sk); | |
804 | bh_unlock_sock(sk); | |
805 | } else { | |
806 | parent = sco_get_sock_listen(conn->src); | |
807 | if (!parent) | |
808 | goto done; | |
809 | ||
810 | bh_lock_sock(parent); | |
811 | ||
812 | sk = sco_sock_alloc(NULL, BTPROTO_SCO, GFP_ATOMIC); | |
813 | if (!sk) { | |
814 | bh_unlock_sock(parent); | |
815 | goto done; | |
816 | } | |
817 | ||
818 | sco_sock_init(sk, parent); | |
819 | ||
820 | bacpy(&bt_sk(sk)->src, conn->src); | |
821 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
822 | ||
823 | hci_conn_hold(conn->hcon); | |
824 | __sco_chan_add(conn, sk, parent); | |
825 | ||
826 | sk->sk_state = BT_CONNECTED; | |
827 | ||
828 | /* Wake up parent */ | |
829 | parent->sk_data_ready(parent, 1); | |
830 | ||
831 | bh_unlock_sock(parent); | |
832 | } | |
833 | ||
834 | done: | |
835 | sco_conn_unlock(conn); | |
836 | } | |
837 | ||
838 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
839 | static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type) | |
840 | { | |
841 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); | |
842 | ||
843 | /* Always accept connection */ | |
844 | return HCI_LM_ACCEPT; | |
845 | } | |
846 | ||
847 | static int sco_connect_cfm(struct hci_conn *hcon, __u8 status) | |
848 | { | |
849 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
850 | ||
851 | if (hcon->type != SCO_LINK) | |
852 | return 0; | |
853 | ||
854 | if (!status) { | |
855 | struct sco_conn *conn; | |
856 | ||
857 | conn = sco_conn_add(hcon, status); | |
858 | if (conn) | |
859 | sco_conn_ready(conn); | |
860 | } else | |
861 | sco_conn_del(hcon, bt_err(status)); | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | static int sco_disconn_ind(struct hci_conn *hcon, __u8 reason) | |
867 | { | |
868 | BT_DBG("hcon %p reason %d", hcon, reason); | |
869 | ||
870 | if (hcon->type != SCO_LINK) | |
871 | return 0; | |
872 | ||
873 | sco_conn_del(hcon, bt_err(reason)); | |
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: | |
892 | kfree_skb(skb); | |
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, | |
929 | .ioctl = sock_no_ioctl, | |
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 | ||
be9d1227 | 973 | class_create_file(&bt_class, &class_attr_sco); |
1da177e4 LT |
974 | |
975 | BT_INFO("SCO (Voice Link) ver %s", VERSION); | |
976 | BT_INFO("SCO socket layer initialized"); | |
977 | ||
978 | return 0; | |
979 | ||
980 | error: | |
981 | proto_unregister(&sco_proto); | |
982 | return err; | |
983 | } | |
984 | ||
985 | static void __exit sco_exit(void) | |
986 | { | |
be9d1227 | 987 | class_remove_file(&bt_class, &class_attr_sco); |
1da177e4 LT |
988 | |
989 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
990 | BT_ERR("SCO socket unregistration failed"); | |
991 | ||
992 | if (hci_unregister_proto(&sco_hci_proto) < 0) | |
993 | BT_ERR("SCO protocol unregistration failed"); | |
994 | ||
995 | proto_unregister(&sco_proto); | |
996 | } | |
997 | ||
998 | module_init(sco_init); | |
999 | module_exit(sco_exit); | |
1000 | ||
1001 | MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>"); | |
1002 | MODULE_DESCRIPTION("Bluetooth SCO ver " VERSION); | |
1003 | MODULE_VERSION(VERSION); | |
1004 | MODULE_LICENSE("GPL"); | |
1005 | MODULE_ALIAS("bt-proto-2"); |