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> | |
41 | #include <linux/proc_fs.h> | |
42 | #include <linux/seq_file.h> | |
43 | #include <linux/list.h> | |
44 | #include <net/sock.h> | |
45 | ||
46 | #include <asm/system.h> | |
47 | #include <asm/uaccess.h> | |
48 | ||
49 | #include <net/bluetooth/bluetooth.h> | |
50 | #include <net/bluetooth/hci_core.h> | |
51 | #include <net/bluetooth/sco.h> | |
52 | ||
53 | #ifndef CONFIG_BT_SCO_DEBUG | |
54 | #undef BT_DBG | |
55 | #define BT_DBG(D...) | |
56 | #endif | |
57 | ||
58 | #define VERSION "0.4" | |
59 | ||
60 | static struct proto_ops sco_sock_ops; | |
61 | ||
62 | static struct bt_sock_list sco_sk_list = { | |
63 | .lock = RW_LOCK_UNLOCKED | |
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 | ||
102 | static void sco_sock_init_timer(struct sock *sk) | |
103 | { | |
104 | init_timer(&sk->sk_timer); | |
105 | sk->sk_timer.function = sco_sock_timeout; | |
106 | sk->sk_timer.data = (unsigned long)sk; | |
107 | } | |
108 | ||
109 | /* ---- SCO connections ---- */ | |
110 | static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status) | |
111 | { | |
112 | struct hci_dev *hdev = hcon->hdev; | |
113 | struct sco_conn *conn; | |
114 | ||
115 | if ((conn = hcon->sco_data)) | |
116 | return conn; | |
117 | ||
118 | if (status) | |
119 | return conn; | |
120 | ||
121 | if (!(conn = kmalloc(sizeof(struct sco_conn), GFP_ATOMIC))) | |
122 | return NULL; | |
123 | memset(conn, 0, sizeof(struct sco_conn)); | |
124 | ||
125 | spin_lock_init(&conn->lock); | |
126 | ||
127 | hcon->sco_data = conn; | |
128 | conn->hcon = hcon; | |
129 | ||
130 | conn->src = &hdev->bdaddr; | |
131 | conn->dst = &hcon->dst; | |
132 | ||
133 | if (hdev->sco_mtu > 0) | |
134 | conn->mtu = hdev->sco_mtu; | |
135 | else | |
136 | conn->mtu = 60; | |
137 | ||
138 | BT_DBG("hcon %p conn %p", hcon, conn); | |
139 | return conn; | |
140 | } | |
141 | ||
142 | static inline struct sock *sco_chan_get(struct sco_conn *conn) | |
143 | { | |
144 | struct sock *sk = NULL; | |
145 | sco_conn_lock(conn); | |
146 | sk = conn->sk; | |
147 | sco_conn_unlock(conn); | |
148 | return sk; | |
149 | } | |
150 | ||
151 | static int sco_conn_del(struct hci_conn *hcon, int err) | |
152 | { | |
153 | struct sco_conn *conn; | |
154 | struct sock *sk; | |
155 | ||
156 | if (!(conn = hcon->sco_data)) | |
157 | return 0; | |
158 | ||
159 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
160 | ||
161 | /* Kill socket */ | |
162 | if ((sk = sco_chan_get(conn))) { | |
163 | bh_lock_sock(sk); | |
164 | sco_sock_clear_timer(sk); | |
165 | sco_chan_del(sk, err); | |
166 | bh_unlock_sock(sk); | |
167 | sco_sock_kill(sk); | |
168 | } | |
169 | ||
170 | hcon->sco_data = NULL; | |
171 | kfree(conn); | |
172 | return 0; | |
173 | } | |
174 | ||
175 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
176 | { | |
177 | int err = 0; | |
178 | ||
179 | sco_conn_lock(conn); | |
180 | if (conn->sk) { | |
181 | err = -EBUSY; | |
182 | } else { | |
183 | __sco_chan_add(conn, sk, parent); | |
184 | } | |
185 | sco_conn_unlock(conn); | |
186 | return err; | |
187 | } | |
188 | ||
189 | static int sco_connect(struct sock *sk) | |
190 | { | |
191 | bdaddr_t *src = &bt_sk(sk)->src; | |
192 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
193 | struct sco_conn *conn; | |
194 | struct hci_conn *hcon; | |
195 | struct hci_dev *hdev; | |
196 | int err = 0; | |
197 | ||
198 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
199 | ||
200 | if (!(hdev = hci_get_route(dst, src))) | |
201 | return -EHOSTUNREACH; | |
202 | ||
203 | hci_dev_lock_bh(hdev); | |
204 | ||
205 | err = -ENOMEM; | |
206 | ||
207 | hcon = hci_connect(hdev, SCO_LINK, dst); | |
208 | if (!hcon) | |
209 | goto done; | |
210 | ||
211 | conn = sco_conn_add(hcon, 0); | |
212 | if (!conn) { | |
213 | hci_conn_put(hcon); | |
214 | goto done; | |
215 | } | |
216 | ||
217 | /* Update source addr of the socket */ | |
218 | bacpy(src, conn->src); | |
219 | ||
220 | err = sco_chan_add(conn, sk, NULL); | |
221 | if (err) | |
222 | goto done; | |
223 | ||
224 | if (hcon->state == BT_CONNECTED) { | |
225 | sco_sock_clear_timer(sk); | |
226 | sk->sk_state = BT_CONNECTED; | |
227 | } else { | |
228 | sk->sk_state = BT_CONNECT; | |
229 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
230 | } | |
231 | done: | |
232 | hci_dev_unlock_bh(hdev); | |
233 | hci_dev_put(hdev); | |
234 | return err; | |
235 | } | |
236 | ||
237 | static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) | |
238 | { | |
239 | struct sco_conn *conn = sco_pi(sk)->conn; | |
240 | struct sk_buff *skb; | |
241 | int err, count; | |
242 | ||
243 | /* Check outgoing MTU */ | |
244 | if (len > conn->mtu) | |
245 | return -EINVAL; | |
246 | ||
247 | BT_DBG("sk %p len %d", sk, len); | |
248 | ||
249 | count = min_t(unsigned int, conn->mtu, len); | |
250 | if (!(skb = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err))) | |
251 | return err; | |
252 | ||
253 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
254 | err = -EFAULT; | |
255 | goto fail; | |
256 | } | |
257 | ||
258 | if ((err = hci_send_sco(conn->hcon, skb)) < 0) | |
259 | goto fail; | |
260 | ||
261 | return count; | |
262 | ||
263 | fail: | |
264 | kfree_skb(skb); | |
265 | return err; | |
266 | } | |
267 | ||
268 | static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) | |
269 | { | |
270 | struct sock *sk = sco_chan_get(conn); | |
271 | ||
272 | if (!sk) | |
273 | goto drop; | |
274 | ||
275 | BT_DBG("sk %p len %d", sk, skb->len); | |
276 | ||
277 | if (sk->sk_state != BT_CONNECTED) | |
278 | goto drop; | |
279 | ||
280 | if (!sock_queue_rcv_skb(sk, skb)) | |
281 | return; | |
282 | ||
283 | drop: | |
284 | kfree_skb(skb); | |
285 | return; | |
286 | } | |
287 | ||
288 | /* -------- Socket interface ---------- */ | |
289 | static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba) | |
290 | { | |
291 | struct sock *sk; | |
292 | struct hlist_node *node; | |
293 | ||
294 | sk_for_each(sk, node, &sco_sk_list.head) | |
295 | if (!bacmp(&bt_sk(sk)->src, ba)) | |
296 | goto found; | |
297 | sk = NULL; | |
298 | found: | |
299 | return sk; | |
300 | } | |
301 | ||
302 | /* Find socket listening on source bdaddr. | |
303 | * Returns closest match. | |
304 | */ | |
305 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
306 | { | |
307 | struct sock *sk = NULL, *sk1 = NULL; | |
308 | struct hlist_node *node; | |
309 | ||
310 | read_lock(&sco_sk_list.lock); | |
311 | ||
312 | sk_for_each(sk, node, &sco_sk_list.head) { | |
313 | if (sk->sk_state != BT_LISTEN) | |
314 | continue; | |
315 | ||
316 | /* Exact match. */ | |
317 | if (!bacmp(&bt_sk(sk)->src, src)) | |
318 | break; | |
319 | ||
320 | /* Closest match */ | |
321 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
322 | sk1 = sk; | |
323 | } | |
324 | ||
325 | read_unlock(&sco_sk_list.lock); | |
326 | ||
327 | return node ? sk : sk1; | |
328 | } | |
329 | ||
330 | static void sco_sock_destruct(struct sock *sk) | |
331 | { | |
332 | BT_DBG("sk %p", sk); | |
333 | ||
334 | skb_queue_purge(&sk->sk_receive_queue); | |
335 | skb_queue_purge(&sk->sk_write_queue); | |
336 | } | |
337 | ||
338 | static void sco_sock_cleanup_listen(struct sock *parent) | |
339 | { | |
340 | struct sock *sk; | |
341 | ||
342 | BT_DBG("parent %p", parent); | |
343 | ||
344 | /* Close not yet accepted channels */ | |
345 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
346 | sco_sock_close(sk); | |
347 | sco_sock_kill(sk); | |
348 | } | |
349 | ||
350 | parent->sk_state = BT_CLOSED; | |
351 | sock_set_flag(parent, SOCK_ZAPPED); | |
352 | } | |
353 | ||
354 | /* Kill socket (only if zapped and orphan) | |
355 | * Must be called on unlocked socket. | |
356 | */ | |
357 | static void sco_sock_kill(struct sock *sk) | |
358 | { | |
359 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
360 | return; | |
361 | ||
362 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
363 | ||
364 | /* Kill poor orphan */ | |
365 | bt_sock_unlink(&sco_sk_list, sk); | |
366 | sock_set_flag(sk, SOCK_DEAD); | |
367 | sock_put(sk); | |
368 | } | |
369 | ||
370 | /* Close socket. | |
371 | * Must be called on unlocked socket. | |
372 | */ | |
373 | static void sco_sock_close(struct sock *sk) | |
374 | { | |
375 | struct sco_conn *conn; | |
376 | ||
377 | sco_sock_clear_timer(sk); | |
378 | ||
379 | lock_sock(sk); | |
380 | ||
381 | conn = sco_pi(sk)->conn; | |
382 | ||
383 | BT_DBG("sk %p state %d conn %p socket %p", sk, sk->sk_state, conn, sk->sk_socket); | |
384 | ||
385 | switch (sk->sk_state) { | |
386 | case BT_LISTEN: | |
387 | sco_sock_cleanup_listen(sk); | |
388 | break; | |
389 | ||
390 | case BT_CONNECTED: | |
391 | case BT_CONFIG: | |
392 | case BT_CONNECT: | |
393 | case BT_DISCONN: | |
394 | sco_chan_del(sk, ECONNRESET); | |
395 | break; | |
396 | ||
397 | default: | |
398 | sock_set_flag(sk, SOCK_ZAPPED); | |
399 | break; | |
400 | }; | |
401 | ||
402 | release_sock(sk); | |
403 | ||
404 | sco_sock_kill(sk); | |
405 | } | |
406 | ||
407 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
408 | { | |
409 | BT_DBG("sk %p", sk); | |
410 | ||
411 | if (parent) | |
412 | sk->sk_type = parent->sk_type; | |
413 | } | |
414 | ||
415 | static struct proto sco_proto = { | |
416 | .name = "SCO", | |
417 | .owner = THIS_MODULE, | |
418 | .obj_size = sizeof(struct sco_pinfo) | |
419 | }; | |
420 | ||
dd0fc66f | 421 | static struct sock *sco_sock_alloc(struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
422 | { |
423 | struct sock *sk; | |
424 | ||
425 | sk = sk_alloc(PF_BLUETOOTH, prio, &sco_proto, 1); | |
426 | if (!sk) | |
427 | return NULL; | |
428 | ||
429 | sock_init_data(sock, sk); | |
430 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
431 | ||
432 | sk->sk_destruct = sco_sock_destruct; | |
433 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
434 | ||
435 | sock_reset_flag(sk, SOCK_ZAPPED); | |
436 | ||
437 | sk->sk_protocol = proto; | |
438 | sk->sk_state = BT_OPEN; | |
439 | ||
440 | sco_sock_init_timer(sk); | |
441 | ||
442 | bt_sock_link(&sco_sk_list, sk); | |
443 | return sk; | |
444 | } | |
445 | ||
446 | static int sco_sock_create(struct socket *sock, int protocol) | |
447 | { | |
448 | struct sock *sk; | |
449 | ||
450 | BT_DBG("sock %p", sock); | |
451 | ||
452 | sock->state = SS_UNCONNECTED; | |
453 | ||
454 | if (sock->type != SOCK_SEQPACKET) | |
455 | return -ESOCKTNOSUPPORT; | |
456 | ||
457 | sock->ops = &sco_sock_ops; | |
458 | ||
459 | if (!(sk = sco_sock_alloc(sock, protocol, GFP_KERNEL))) | |
460 | return -ENOMEM; | |
461 | ||
462 | sco_sock_init(sk, NULL); | |
463 | return 0; | |
464 | } | |
465 | ||
466 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
467 | { | |
468 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
469 | struct sock *sk = sock->sk; | |
470 | bdaddr_t *src = &sa->sco_bdaddr; | |
471 | int err = 0; | |
472 | ||
473 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
474 | ||
475 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
476 | return -EINVAL; | |
477 | ||
478 | lock_sock(sk); | |
479 | ||
480 | if (sk->sk_state != BT_OPEN) { | |
481 | err = -EBADFD; | |
482 | goto done; | |
483 | } | |
484 | ||
485 | write_lock_bh(&sco_sk_list.lock); | |
486 | ||
487 | if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) { | |
488 | err = -EADDRINUSE; | |
489 | } else { | |
490 | /* Save source address */ | |
491 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); | |
492 | sk->sk_state = BT_BOUND; | |
493 | } | |
494 | ||
495 | write_unlock_bh(&sco_sk_list.lock); | |
496 | ||
497 | done: | |
498 | release_sock(sk); | |
499 | return err; | |
500 | } | |
501 | ||
502 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
503 | { | |
504 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
505 | struct sock *sk = sock->sk; | |
506 | int err = 0; | |
507 | ||
508 | ||
509 | BT_DBG("sk %p", sk); | |
510 | ||
511 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_sco)) | |
512 | return -EINVAL; | |
513 | ||
514 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
515 | return -EBADFD; | |
516 | ||
517 | if (sk->sk_type != SOCK_SEQPACKET) | |
518 | return -EINVAL; | |
519 | ||
520 | lock_sock(sk); | |
521 | ||
522 | /* Set destination address and psm */ | |
523 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
524 | ||
525 | if ((err = sco_connect(sk))) | |
526 | goto done; | |
527 | ||
528 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
529 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
530 | ||
531 | done: | |
532 | release_sock(sk); | |
533 | return err; | |
534 | } | |
535 | ||
536 | static int sco_sock_listen(struct socket *sock, int backlog) | |
537 | { | |
538 | struct sock *sk = sock->sk; | |
539 | int err = 0; | |
540 | ||
541 | BT_DBG("sk %p backlog %d", sk, backlog); | |
542 | ||
543 | lock_sock(sk); | |
544 | ||
545 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
546 | err = -EBADFD; | |
547 | goto done; | |
548 | } | |
549 | ||
550 | sk->sk_max_ack_backlog = backlog; | |
551 | sk->sk_ack_backlog = 0; | |
552 | sk->sk_state = BT_LISTEN; | |
553 | ||
554 | done: | |
555 | release_sock(sk); | |
556 | return err; | |
557 | } | |
558 | ||
559 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
560 | { | |
561 | DECLARE_WAITQUEUE(wait, current); | |
562 | struct sock *sk = sock->sk, *ch; | |
563 | long timeo; | |
564 | int err = 0; | |
565 | ||
566 | lock_sock(sk); | |
567 | ||
568 | if (sk->sk_state != BT_LISTEN) { | |
569 | err = -EBADFD; | |
570 | goto done; | |
571 | } | |
572 | ||
573 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
574 | ||
575 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
576 | ||
577 | /* Wait for an incoming connection. (wake-one). */ | |
578 | add_wait_queue_exclusive(sk->sk_sleep, &wait); | |
579 | while (!(ch = bt_accept_dequeue(sk, newsock))) { | |
580 | set_current_state(TASK_INTERRUPTIBLE); | |
581 | if (!timeo) { | |
582 | err = -EAGAIN; | |
583 | break; | |
584 | } | |
585 | ||
586 | release_sock(sk); | |
587 | timeo = schedule_timeout(timeo); | |
588 | lock_sock(sk); | |
589 | ||
590 | if (sk->sk_state != BT_LISTEN) { | |
591 | err = -EBADFD; | |
592 | break; | |
593 | } | |
594 | ||
595 | if (signal_pending(current)) { | |
596 | err = sock_intr_errno(timeo); | |
597 | break; | |
598 | } | |
599 | } | |
600 | set_current_state(TASK_RUNNING); | |
601 | remove_wait_queue(sk->sk_sleep, &wait); | |
602 | ||
603 | if (err) | |
604 | goto done; | |
605 | ||
606 | newsock->state = SS_CONNECTED; | |
607 | ||
608 | BT_DBG("new socket %p", ch); | |
609 | ||
610 | done: | |
611 | release_sock(sk); | |
612 | return err; | |
613 | } | |
614 | ||
615 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
616 | { | |
617 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
618 | struct sock *sk = sock->sk; | |
619 | ||
620 | BT_DBG("sock %p, sk %p", sock, sk); | |
621 | ||
622 | addr->sa_family = AF_BLUETOOTH; | |
623 | *len = sizeof(struct sockaddr_sco); | |
624 | ||
625 | if (peer) | |
626 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
627 | else | |
628 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
629 | ||
630 | return 0; | |
631 | } | |
632 | ||
633 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, | |
634 | struct msghdr *msg, size_t len) | |
635 | { | |
636 | struct sock *sk = sock->sk; | |
637 | int err = 0; | |
638 | ||
639 | BT_DBG("sock %p, sk %p", sock, sk); | |
640 | ||
641 | if (sk->sk_err) | |
642 | return sock_error(sk); | |
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 | ||
896 | /* ---- Proc fs support ---- */ | |
897 | #ifdef CONFIG_PROC_FS | |
898 | static void *sco_seq_start(struct seq_file *seq, loff_t *pos) | |
899 | { | |
900 | struct sock *sk; | |
901 | struct hlist_node *node; | |
902 | loff_t l = *pos; | |
903 | ||
904 | read_lock_bh(&sco_sk_list.lock); | |
905 | ||
906 | sk_for_each(sk, node, &sco_sk_list.head) | |
907 | if (!l--) | |
908 | goto found; | |
909 | sk = NULL; | |
910 | found: | |
911 | return sk; | |
912 | } | |
913 | ||
914 | static void *sco_seq_next(struct seq_file *seq, void *e, loff_t *pos) | |
915 | { | |
916 | struct sock *sk = e; | |
917 | (*pos)++; | |
918 | return sk_next(sk); | |
919 | } | |
920 | ||
921 | static void sco_seq_stop(struct seq_file *seq, void *e) | |
922 | { | |
923 | read_unlock_bh(&sco_sk_list.lock); | |
924 | } | |
925 | ||
926 | static int sco_seq_show(struct seq_file *seq, void *e) | |
927 | { | |
928 | struct sock *sk = e; | |
929 | seq_printf(seq, "%s %s %d\n", | |
930 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), sk->sk_state); | |
931 | return 0; | |
932 | } | |
933 | ||
934 | static struct seq_operations sco_seq_ops = { | |
935 | .start = sco_seq_start, | |
936 | .next = sco_seq_next, | |
937 | .stop = sco_seq_stop, | |
938 | .show = sco_seq_show | |
939 | }; | |
940 | ||
941 | static int sco_seq_open(struct inode *inode, struct file *file) | |
942 | { | |
943 | return seq_open(file, &sco_seq_ops); | |
944 | } | |
945 | ||
946 | static struct file_operations sco_seq_fops = { | |
947 | .owner = THIS_MODULE, | |
948 | .open = sco_seq_open, | |
949 | .read = seq_read, | |
950 | .llseek = seq_lseek, | |
951 | .release = seq_release, | |
952 | }; | |
953 | ||
954 | static int __init sco_proc_init(void) | |
955 | { | |
956 | struct proc_dir_entry *p = create_proc_entry("sco", S_IRUGO, proc_bt); | |
957 | if (!p) | |
958 | return -ENOMEM; | |
959 | p->owner = THIS_MODULE; | |
960 | p->proc_fops = &sco_seq_fops; | |
961 | return 0; | |
962 | } | |
963 | ||
964 | static void __exit sco_proc_cleanup(void) | |
965 | { | |
966 | remove_proc_entry("sco", proc_bt); | |
967 | } | |
968 | ||
969 | #else /* CONFIG_PROC_FS */ | |
970 | ||
971 | static int __init sco_proc_init(void) | |
972 | { | |
973 | return 0; | |
974 | } | |
975 | ||
976 | static void __exit sco_proc_cleanup(void) | |
977 | { | |
978 | return; | |
979 | } | |
980 | #endif /* CONFIG_PROC_FS */ | |
981 | ||
982 | static struct proto_ops sco_sock_ops = { | |
983 | .family = PF_BLUETOOTH, | |
984 | .owner = THIS_MODULE, | |
985 | .release = sco_sock_release, | |
986 | .bind = sco_sock_bind, | |
987 | .connect = sco_sock_connect, | |
988 | .listen = sco_sock_listen, | |
989 | .accept = sco_sock_accept, | |
990 | .getname = sco_sock_getname, | |
991 | .sendmsg = sco_sock_sendmsg, | |
992 | .recvmsg = bt_sock_recvmsg, | |
993 | .poll = bt_sock_poll, | |
994 | .ioctl = sock_no_ioctl, | |
995 | .mmap = sock_no_mmap, | |
996 | .socketpair = sock_no_socketpair, | |
997 | .shutdown = sock_no_shutdown, | |
998 | .setsockopt = sco_sock_setsockopt, | |
999 | .getsockopt = sco_sock_getsockopt | |
1000 | }; | |
1001 | ||
1002 | static struct net_proto_family sco_sock_family_ops = { | |
1003 | .family = PF_BLUETOOTH, | |
1004 | .owner = THIS_MODULE, | |
1005 | .create = sco_sock_create, | |
1006 | }; | |
1007 | ||
1008 | static struct hci_proto sco_hci_proto = { | |
1009 | .name = "SCO", | |
1010 | .id = HCI_PROTO_SCO, | |
1011 | .connect_ind = sco_connect_ind, | |
1012 | .connect_cfm = sco_connect_cfm, | |
1013 | .disconn_ind = sco_disconn_ind, | |
1014 | .recv_scodata = sco_recv_scodata | |
1015 | }; | |
1016 | ||
1017 | static int __init sco_init(void) | |
1018 | { | |
1019 | int err; | |
1020 | ||
1021 | err = proto_register(&sco_proto, 0); | |
1022 | if (err < 0) | |
1023 | return err; | |
1024 | ||
1025 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1026 | if (err < 0) { | |
1027 | BT_ERR("SCO socket registration failed"); | |
1028 | goto error; | |
1029 | } | |
1030 | ||
1031 | err = hci_register_proto(&sco_hci_proto); | |
1032 | if (err < 0) { | |
1033 | BT_ERR("SCO protocol registration failed"); | |
1034 | bt_sock_unregister(BTPROTO_SCO); | |
1035 | goto error; | |
1036 | } | |
1037 | ||
1038 | sco_proc_init(); | |
1039 | ||
1040 | BT_INFO("SCO (Voice Link) ver %s", VERSION); | |
1041 | BT_INFO("SCO socket layer initialized"); | |
1042 | ||
1043 | return 0; | |
1044 | ||
1045 | error: | |
1046 | proto_unregister(&sco_proto); | |
1047 | return err; | |
1048 | } | |
1049 | ||
1050 | static void __exit sco_exit(void) | |
1051 | { | |
1052 | sco_proc_cleanup(); | |
1053 | ||
1054 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1055 | BT_ERR("SCO socket unregistration failed"); | |
1056 | ||
1057 | if (hci_unregister_proto(&sco_hci_proto) < 0) | |
1058 | BT_ERR("SCO protocol unregistration failed"); | |
1059 | ||
1060 | proto_unregister(&sco_proto); | |
1061 | } | |
1062 | ||
1063 | module_init(sco_init); | |
1064 | module_exit(sco_exit); | |
1065 | ||
1066 | MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>"); | |
1067 | MODULE_DESCRIPTION("Bluetooth SCO ver " VERSION); | |
1068 | MODULE_VERSION(VERSION); | |
1069 | MODULE_LICENSE("GPL"); | |
1070 | MODULE_ALIAS("bt-proto-2"); |