]>
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 | 27 | #include <linux/module.h> |
aef7d97c MH |
28 | #include <linux/debugfs.h> |
29 | #include <linux/seq_file.h> | |
1da177e4 LT |
30 | |
31 | #include <net/bluetooth/bluetooth.h> | |
32 | #include <net/bluetooth/hci_core.h> | |
33 | #include <net/bluetooth/sco.h> | |
34 | ||
eb939922 | 35 | static bool disable_esco; |
1da177e4 | 36 | |
90ddc4f0 | 37 | static const struct proto_ops sco_sock_ops; |
1da177e4 LT |
38 | |
39 | static struct bt_sock_list sco_sk_list = { | |
d5fb2962 | 40 | .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock) |
1da177e4 LT |
41 | }; |
42 | ||
43 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent); | |
44 | static void sco_chan_del(struct sock *sk, int err); | |
45 | ||
1da177e4 LT |
46 | static void sco_sock_close(struct sock *sk); |
47 | static void sco_sock_kill(struct sock *sk); | |
48 | ||
49 | /* ---- SCO timers ---- */ | |
50 | static void sco_sock_timeout(unsigned long arg) | |
51 | { | |
52 | struct sock *sk = (struct sock *) arg; | |
53 | ||
54 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
55 | ||
56 | bh_lock_sock(sk); | |
57 | sk->sk_err = ETIMEDOUT; | |
58 | sk->sk_state_change(sk); | |
59 | bh_unlock_sock(sk); | |
60 | ||
61 | sco_sock_kill(sk); | |
62 | sock_put(sk); | |
63 | } | |
64 | ||
65 | static void sco_sock_set_timer(struct sock *sk, long timeout) | |
66 | { | |
67 | BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
68 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
69 | } | |
70 | ||
71 | static void sco_sock_clear_timer(struct sock *sk) | |
72 | { | |
73 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
74 | sk_stop_timer(sk, &sk->sk_timer); | |
75 | } | |
76 | ||
1da177e4 | 77 | /* ---- SCO connections ---- */ |
519e42b3 | 78 | static struct sco_conn *sco_conn_add(struct hci_conn *hcon) |
1da177e4 LT |
79 | { |
80 | struct hci_dev *hdev = hcon->hdev; | |
25ea6db0 | 81 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 | 82 | |
519e42b3 | 83 | if (conn) |
1da177e4 LT |
84 | return conn; |
85 | ||
25ea6db0 MH |
86 | conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC); |
87 | if (!conn) | |
1da177e4 | 88 | return NULL; |
1da177e4 LT |
89 | |
90 | spin_lock_init(&conn->lock); | |
91 | ||
92 | hcon->sco_data = conn; | |
93 | conn->hcon = hcon; | |
94 | ||
95 | conn->src = &hdev->bdaddr; | |
96 | conn->dst = &hcon->dst; | |
97 | ||
98 | if (hdev->sco_mtu > 0) | |
99 | conn->mtu = hdev->sco_mtu; | |
100 | else | |
101 | conn->mtu = 60; | |
102 | ||
103 | BT_DBG("hcon %p conn %p", hcon, conn); | |
25ea6db0 | 104 | |
1da177e4 LT |
105 | return conn; |
106 | } | |
107 | ||
6039aa73 | 108 | static struct sock *sco_chan_get(struct sco_conn *conn) |
1da177e4 LT |
109 | { |
110 | struct sock *sk = NULL; | |
111 | sco_conn_lock(conn); | |
112 | sk = conn->sk; | |
113 | sco_conn_unlock(conn); | |
114 | return sk; | |
115 | } | |
116 | ||
117 | static int sco_conn_del(struct hci_conn *hcon, int err) | |
118 | { | |
735cbc47 | 119 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 LT |
120 | struct sock *sk; |
121 | ||
735cbc47 | 122 | if (!conn) |
1da177e4 LT |
123 | return 0; |
124 | ||
125 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
126 | ||
127 | /* Kill socket */ | |
735cbc47 AE |
128 | sk = sco_chan_get(conn); |
129 | if (sk) { | |
1da177e4 LT |
130 | bh_lock_sock(sk); |
131 | sco_sock_clear_timer(sk); | |
132 | sco_chan_del(sk, err); | |
133 | bh_unlock_sock(sk); | |
134 | sco_sock_kill(sk); | |
135 | } | |
136 | ||
137 | hcon->sco_data = NULL; | |
138 | kfree(conn); | |
139 | return 0; | |
140 | } | |
141 | ||
6039aa73 GP |
142 | static int sco_chan_add(struct sco_conn *conn, struct sock *sk, |
143 | struct sock *parent) | |
1da177e4 LT |
144 | { |
145 | int err = 0; | |
146 | ||
147 | sco_conn_lock(conn); | |
b9dbdbc1 | 148 | if (conn->sk) |
1da177e4 | 149 | err = -EBUSY; |
b9dbdbc1 | 150 | else |
1da177e4 | 151 | __sco_chan_add(conn, sk, parent); |
b9dbdbc1 | 152 | |
1da177e4 LT |
153 | sco_conn_unlock(conn); |
154 | return err; | |
155 | } | |
156 | ||
157 | static int sco_connect(struct sock *sk) | |
158 | { | |
159 | bdaddr_t *src = &bt_sk(sk)->src; | |
160 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
161 | struct sco_conn *conn; | |
162 | struct hci_conn *hcon; | |
163 | struct hci_dev *hdev; | |
b6a0dc82 | 164 | int err, type; |
1da177e4 LT |
165 | |
166 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
167 | ||
735cbc47 AE |
168 | hdev = hci_get_route(dst, src); |
169 | if (!hdev) | |
1da177e4 LT |
170 | return -EHOSTUNREACH; |
171 | ||
09fd0de5 | 172 | hci_dev_lock(hdev); |
1da177e4 | 173 | |
7cb127d5 MH |
174 | if (lmp_esco_capable(hdev) && !disable_esco) |
175 | type = ESCO_LINK; | |
176 | else | |
177 | type = SCO_LINK; | |
b6a0dc82 | 178 | |
b12f62cf AG |
179 | hcon = hci_connect(hdev, type, dst, BDADDR_BREDR, BT_SECURITY_LOW, |
180 | HCI_AT_NO_BONDING); | |
30e76272 VT |
181 | if (IS_ERR(hcon)) { |
182 | err = PTR_ERR(hcon); | |
1da177e4 | 183 | goto done; |
30e76272 | 184 | } |
1da177e4 | 185 | |
519e42b3 | 186 | conn = sco_conn_add(hcon); |
1da177e4 LT |
187 | if (!conn) { |
188 | hci_conn_put(hcon); | |
30e76272 | 189 | err = -ENOMEM; |
1da177e4 LT |
190 | goto done; |
191 | } | |
192 | ||
193 | /* Update source addr of the socket */ | |
194 | bacpy(src, conn->src); | |
195 | ||
196 | err = sco_chan_add(conn, sk, NULL); | |
197 | if (err) | |
198 | goto done; | |
199 | ||
200 | if (hcon->state == BT_CONNECTED) { | |
201 | sco_sock_clear_timer(sk); | |
202 | sk->sk_state = BT_CONNECTED; | |
203 | } else { | |
204 | sk->sk_state = BT_CONNECT; | |
205 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
206 | } | |
b6a0dc82 | 207 | |
1da177e4 | 208 | done: |
09fd0de5 | 209 | hci_dev_unlock(hdev); |
1da177e4 LT |
210 | hci_dev_put(hdev); |
211 | return err; | |
212 | } | |
213 | ||
6039aa73 | 214 | static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) |
1da177e4 LT |
215 | { |
216 | struct sco_conn *conn = sco_pi(sk)->conn; | |
217 | struct sk_buff *skb; | |
088ce088 | 218 | int err; |
1da177e4 LT |
219 | |
220 | /* Check outgoing MTU */ | |
221 | if (len > conn->mtu) | |
222 | return -EINVAL; | |
223 | ||
224 | BT_DBG("sk %p len %d", sk, len); | |
225 | ||
088ce088 | 226 | skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err); |
b9dbdbc1 | 227 | if (!skb) |
1da177e4 LT |
228 | return err; |
229 | ||
088ce088 | 230 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { |
b9dbdbc1 GP |
231 | kfree_skb(skb); |
232 | return -EFAULT; | |
1da177e4 LT |
233 | } |
234 | ||
0d861d8b | 235 | hci_send_sco(conn->hcon, skb); |
1da177e4 | 236 | |
088ce088 | 237 | return len; |
1da177e4 LT |
238 | } |
239 | ||
6039aa73 | 240 | static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) |
1da177e4 LT |
241 | { |
242 | struct sock *sk = sco_chan_get(conn); | |
243 | ||
244 | if (!sk) | |
245 | goto drop; | |
246 | ||
247 | BT_DBG("sk %p len %d", sk, skb->len); | |
248 | ||
249 | if (sk->sk_state != BT_CONNECTED) | |
250 | goto drop; | |
251 | ||
252 | if (!sock_queue_rcv_skb(sk, skb)) | |
253 | return; | |
254 | ||
255 | drop: | |
256 | kfree_skb(skb); | |
1da177e4 LT |
257 | } |
258 | ||
259 | /* -------- Socket interface ---------- */ | |
fb334059 | 260 | static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba) |
1da177e4 | 261 | { |
1da177e4 | 262 | struct hlist_node *node; |
fb334059 MH |
263 | struct sock *sk; |
264 | ||
265 | sk_for_each(sk, node, &sco_sk_list.head) { | |
266 | if (sk->sk_state != BT_LISTEN) | |
267 | continue; | |
1da177e4 | 268 | |
1da177e4 | 269 | if (!bacmp(&bt_sk(sk)->src, ba)) |
fb334059 MH |
270 | return sk; |
271 | } | |
272 | ||
273 | return NULL; | |
1da177e4 LT |
274 | } |
275 | ||
276 | /* Find socket listening on source bdaddr. | |
277 | * Returns closest match. | |
278 | */ | |
279 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
280 | { | |
281 | struct sock *sk = NULL, *sk1 = NULL; | |
282 | struct hlist_node *node; | |
283 | ||
284 | read_lock(&sco_sk_list.lock); | |
285 | ||
286 | sk_for_each(sk, node, &sco_sk_list.head) { | |
287 | if (sk->sk_state != BT_LISTEN) | |
288 | continue; | |
289 | ||
290 | /* Exact match. */ | |
291 | if (!bacmp(&bt_sk(sk)->src, src)) | |
292 | break; | |
293 | ||
294 | /* Closest match */ | |
295 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
296 | sk1 = sk; | |
297 | } | |
298 | ||
299 | read_unlock(&sco_sk_list.lock); | |
300 | ||
301 | return node ? sk : sk1; | |
302 | } | |
303 | ||
304 | static void sco_sock_destruct(struct sock *sk) | |
305 | { | |
306 | BT_DBG("sk %p", sk); | |
307 | ||
308 | skb_queue_purge(&sk->sk_receive_queue); | |
309 | skb_queue_purge(&sk->sk_write_queue); | |
310 | } | |
311 | ||
312 | static void sco_sock_cleanup_listen(struct sock *parent) | |
313 | { | |
314 | struct sock *sk; | |
315 | ||
316 | BT_DBG("parent %p", parent); | |
317 | ||
318 | /* Close not yet accepted channels */ | |
319 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
320 | sco_sock_close(sk); | |
321 | sco_sock_kill(sk); | |
322 | } | |
323 | ||
324 | parent->sk_state = BT_CLOSED; | |
325 | sock_set_flag(parent, SOCK_ZAPPED); | |
326 | } | |
327 | ||
328 | /* Kill socket (only if zapped and orphan) | |
329 | * Must be called on unlocked socket. | |
330 | */ | |
331 | static void sco_sock_kill(struct sock *sk) | |
332 | { | |
333 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
334 | return; | |
335 | ||
336 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
337 | ||
338 | /* Kill poor orphan */ | |
339 | bt_sock_unlink(&sco_sk_list, sk); | |
340 | sock_set_flag(sk, SOCK_DEAD); | |
341 | sock_put(sk); | |
342 | } | |
343 | ||
fd0b3ff7 | 344 | static void __sco_sock_close(struct sock *sk) |
1da177e4 | 345 | { |
fd0b3ff7 | 346 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
1da177e4 LT |
347 | |
348 | switch (sk->sk_state) { | |
349 | case BT_LISTEN: | |
350 | sco_sock_cleanup_listen(sk); | |
351 | break; | |
352 | ||
353 | case BT_CONNECTED: | |
354 | case BT_CONFIG: | |
4a77708b LAD |
355 | if (sco_pi(sk)->conn) { |
356 | sk->sk_state = BT_DISCONN; | |
357 | sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); | |
358 | hci_conn_put(sco_pi(sk)->conn->hcon); | |
359 | sco_pi(sk)->conn->hcon = NULL; | |
360 | } else | |
361 | sco_chan_del(sk, ECONNRESET); | |
362 | break; | |
363 | ||
1da177e4 LT |
364 | case BT_CONNECT: |
365 | case BT_DISCONN: | |
366 | sco_chan_del(sk, ECONNRESET); | |
367 | break; | |
368 | ||
369 | default: | |
370 | sock_set_flag(sk, SOCK_ZAPPED); | |
371 | break; | |
3ff50b79 | 372 | } |
fd0b3ff7 | 373 | } |
1da177e4 | 374 | |
fd0b3ff7 MH |
375 | /* Must be called on unlocked socket. */ |
376 | static void sco_sock_close(struct sock *sk) | |
377 | { | |
378 | sco_sock_clear_timer(sk); | |
379 | lock_sock(sk); | |
380 | __sco_sock_close(sk); | |
1da177e4 | 381 | release_sock(sk); |
1da177e4 LT |
382 | sco_sock_kill(sk); |
383 | } | |
384 | ||
385 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
386 | { | |
387 | BT_DBG("sk %p", sk); | |
388 | ||
6230c9b4 | 389 | if (parent) { |
1da177e4 | 390 | sk->sk_type = parent->sk_type; |
6230c9b4 PM |
391 | security_sk_clone(parent, sk); |
392 | } | |
1da177e4 LT |
393 | } |
394 | ||
395 | static struct proto sco_proto = { | |
396 | .name = "SCO", | |
397 | .owner = THIS_MODULE, | |
398 | .obj_size = sizeof(struct sco_pinfo) | |
399 | }; | |
400 | ||
1b8d7ae4 | 401 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
402 | { |
403 | struct sock *sk; | |
404 | ||
6257ff21 | 405 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
406 | if (!sk) |
407 | return NULL; | |
408 | ||
409 | sock_init_data(sock, sk); | |
410 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
411 | ||
412 | sk->sk_destruct = sco_sock_destruct; | |
413 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
414 | ||
415 | sock_reset_flag(sk, SOCK_ZAPPED); | |
416 | ||
417 | sk->sk_protocol = proto; | |
418 | sk->sk_state = BT_OPEN; | |
419 | ||
b24b8a24 | 420 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
421 | |
422 | bt_sock_link(&sco_sk_list, sk); | |
423 | return sk; | |
424 | } | |
425 | ||
3f378b68 EP |
426 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol, |
427 | int kern) | |
1da177e4 LT |
428 | { |
429 | struct sock *sk; | |
430 | ||
431 | BT_DBG("sock %p", sock); | |
432 | ||
433 | sock->state = SS_UNCONNECTED; | |
434 | ||
435 | if (sock->type != SOCK_SEQPACKET) | |
436 | return -ESOCKTNOSUPPORT; | |
437 | ||
438 | sock->ops = &sco_sock_ops; | |
439 | ||
1b8d7ae4 | 440 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 441 | if (!sk) |
1da177e4 LT |
442 | return -ENOMEM; |
443 | ||
444 | sco_sock_init(sk, NULL); | |
445 | return 0; | |
446 | } | |
447 | ||
448 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
449 | { | |
450 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
451 | struct sock *sk = sock->sk; | |
1da177e4 LT |
452 | int err = 0; |
453 | ||
454 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
455 | ||
456 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
457 | return -EINVAL; | |
458 | ||
459 | lock_sock(sk); | |
460 | ||
461 | if (sk->sk_state != BT_OPEN) { | |
462 | err = -EBADFD; | |
463 | goto done; | |
464 | } | |
465 | ||
8ed21f7e MH |
466 | if (sk->sk_type != SOCK_SEQPACKET) { |
467 | err = -EINVAL; | |
468 | goto done; | |
1da177e4 LT |
469 | } |
470 | ||
8ed21f7e MH |
471 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); |
472 | ||
473 | sk->sk_state = BT_BOUND; | |
1da177e4 LT |
474 | |
475 | done: | |
476 | release_sock(sk); | |
477 | return err; | |
478 | } | |
479 | ||
480 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
481 | { | |
482 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
483 | struct sock *sk = sock->sk; | |
484 | int err = 0; | |
485 | ||
486 | ||
487 | BT_DBG("sk %p", sk); | |
488 | ||
6503d961 CG |
489 | if (alen < sizeof(struct sockaddr_sco) || |
490 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
491 | return -EINVAL; |
492 | ||
493 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
494 | return -EBADFD; | |
495 | ||
496 | if (sk->sk_type != SOCK_SEQPACKET) | |
497 | return -EINVAL; | |
498 | ||
499 | lock_sock(sk); | |
500 | ||
501 | /* Set destination address and psm */ | |
502 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
503 | ||
735cbc47 AE |
504 | err = sco_connect(sk); |
505 | if (err) | |
1da177e4 LT |
506 | goto done; |
507 | ||
8e87d142 | 508 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
be7c2b99 | 509 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
1da177e4 LT |
510 | |
511 | done: | |
512 | release_sock(sk); | |
513 | return err; | |
514 | } | |
515 | ||
516 | static int sco_sock_listen(struct socket *sock, int backlog) | |
517 | { | |
518 | struct sock *sk = sock->sk; | |
fb334059 | 519 | bdaddr_t *src = &bt_sk(sk)->src; |
1da177e4 LT |
520 | int err = 0; |
521 | ||
522 | BT_DBG("sk %p backlog %d", sk, backlog); | |
523 | ||
524 | lock_sock(sk); | |
525 | ||
7d5d775a | 526 | if (sk->sk_state != BT_BOUND) { |
1da177e4 LT |
527 | err = -EBADFD; |
528 | goto done; | |
529 | } | |
530 | ||
7d5d775a MH |
531 | if (sk->sk_type != SOCK_SEQPACKET) { |
532 | err = -EINVAL; | |
533 | goto done; | |
534 | } | |
535 | ||
fb334059 MH |
536 | write_lock(&sco_sk_list.lock); |
537 | ||
538 | if (__sco_get_sock_listen_by_addr(src)) { | |
539 | err = -EADDRINUSE; | |
540 | goto unlock; | |
541 | } | |
542 | ||
1da177e4 LT |
543 | sk->sk_max_ack_backlog = backlog; |
544 | sk->sk_ack_backlog = 0; | |
fb334059 | 545 | |
1da177e4 LT |
546 | sk->sk_state = BT_LISTEN; |
547 | ||
fb334059 MH |
548 | unlock: |
549 | write_unlock(&sco_sk_list.lock); | |
550 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
565 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
566 | ||
567 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
568 | ||
569 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 570 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
552b0d3c | 571 | while (1) { |
1da177e4 | 572 | set_current_state(TASK_INTERRUPTIBLE); |
552b0d3c PH |
573 | |
574 | if (sk->sk_state != BT_LISTEN) { | |
575 | err = -EBADFD; | |
1da177e4 LT |
576 | break; |
577 | } | |
578 | ||
552b0d3c PH |
579 | ch = bt_accept_dequeue(sk, newsock); |
580 | if (ch) | |
581 | break; | |
1da177e4 | 582 | |
552b0d3c PH |
583 | if (!timeo) { |
584 | err = -EAGAIN; | |
1da177e4 LT |
585 | break; |
586 | } | |
587 | ||
588 | if (signal_pending(current)) { | |
589 | err = sock_intr_errno(timeo); | |
590 | break; | |
591 | } | |
552b0d3c PH |
592 | |
593 | release_sock(sk); | |
594 | timeo = schedule_timeout(timeo); | |
595 | lock_sock(sk); | |
1da177e4 | 596 | } |
552b0d3c | 597 | __set_current_state(TASK_RUNNING); |
aa395145 | 598 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
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; | |
b9dbdbc1 | 634 | int err; |
1da177e4 LT |
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 | ||
b7058842 | 656 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
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 | ||
d58daf42 | 675 | static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
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 | ||
c4c896e1 | 712 | memset(&cinfo, 0, sizeof(cinfo)); |
1da177e4 LT |
713 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; |
714 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
715 | ||
716 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
717 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
718 | err = -EFAULT; | |
719 | ||
720 | break; | |
721 | ||
722 | default: | |
723 | err = -ENOPROTOOPT; | |
724 | break; | |
725 | } | |
726 | ||
727 | release_sock(sk); | |
728 | return err; | |
729 | } | |
730 | ||
d58daf42 MH |
731 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
732 | { | |
733 | struct sock *sk = sock->sk; | |
734 | int len, err = 0; | |
735 | ||
736 | BT_DBG("sk %p", sk); | |
737 | ||
738 | if (level == SOL_SCO) | |
739 | return sco_sock_getsockopt_old(sock, optname, optval, optlen); | |
740 | ||
741 | if (get_user(len, optlen)) | |
742 | return -EFAULT; | |
743 | ||
744 | lock_sock(sk); | |
745 | ||
746 | switch (optname) { | |
747 | default: | |
748 | err = -ENOPROTOOPT; | |
749 | break; | |
750 | } | |
751 | ||
752 | release_sock(sk); | |
753 | return err; | |
754 | } | |
755 | ||
fd0b3ff7 MH |
756 | static int sco_sock_shutdown(struct socket *sock, int how) |
757 | { | |
758 | struct sock *sk = sock->sk; | |
759 | int err = 0; | |
760 | ||
761 | BT_DBG("sock %p, sk %p", sock, sk); | |
762 | ||
763 | if (!sk) | |
764 | return 0; | |
765 | ||
766 | lock_sock(sk); | |
767 | if (!sk->sk_shutdown) { | |
768 | sk->sk_shutdown = SHUTDOWN_MASK; | |
769 | sco_sock_clear_timer(sk); | |
770 | __sco_sock_close(sk); | |
771 | ||
772 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
773 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
be7c2b99 | 774 | sk->sk_lingertime); |
fd0b3ff7 MH |
775 | } |
776 | release_sock(sk); | |
777 | return err; | |
778 | } | |
779 | ||
1da177e4 LT |
780 | static int sco_sock_release(struct socket *sock) |
781 | { | |
782 | struct sock *sk = sock->sk; | |
783 | int err = 0; | |
784 | ||
785 | BT_DBG("sock %p, sk %p", sock, sk); | |
786 | ||
787 | if (!sk) | |
788 | return 0; | |
789 | ||
790 | sco_sock_close(sk); | |
791 | ||
792 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
793 | lock_sock(sk); | |
794 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
795 | release_sock(sk); | |
796 | } | |
797 | ||
798 | sock_orphan(sk); | |
799 | sco_sock_kill(sk); | |
800 | return err; | |
801 | } | |
802 | ||
803 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
804 | { | |
805 | BT_DBG("conn %p", conn); | |
806 | ||
807 | sco_pi(sk)->conn = conn; | |
808 | conn->sk = sk; | |
809 | ||
810 | if (parent) | |
811 | bt_accept_enqueue(parent, sk); | |
812 | } | |
813 | ||
8e87d142 | 814 | /* Delete channel. |
1da177e4 LT |
815 | * Must be called on the locked socket. */ |
816 | static void sco_chan_del(struct sock *sk, int err) | |
817 | { | |
818 | struct sco_conn *conn; | |
819 | ||
820 | conn = sco_pi(sk)->conn; | |
821 | ||
822 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
823 | ||
8e87d142 | 824 | if (conn) { |
1da177e4 LT |
825 | sco_conn_lock(conn); |
826 | conn->sk = NULL; | |
827 | sco_pi(sk)->conn = NULL; | |
828 | sco_conn_unlock(conn); | |
4a77708b LAD |
829 | |
830 | if (conn->hcon) | |
831 | hci_conn_put(conn->hcon); | |
1da177e4 LT |
832 | } |
833 | ||
834 | sk->sk_state = BT_CLOSED; | |
835 | sk->sk_err = err; | |
836 | sk->sk_state_change(sk); | |
837 | ||
838 | sock_set_flag(sk, SOCK_ZAPPED); | |
839 | } | |
840 | ||
841 | static void sco_conn_ready(struct sco_conn *conn) | |
842 | { | |
735cbc47 AE |
843 | struct sock *parent; |
844 | struct sock *sk = conn->sk; | |
1da177e4 LT |
845 | |
846 | BT_DBG("conn %p", conn); | |
847 | ||
848 | sco_conn_lock(conn); | |
849 | ||
735cbc47 | 850 | if (sk) { |
1da177e4 LT |
851 | sco_sock_clear_timer(sk); |
852 | bh_lock_sock(sk); | |
853 | sk->sk_state = BT_CONNECTED; | |
854 | sk->sk_state_change(sk); | |
855 | bh_unlock_sock(sk); | |
856 | } else { | |
857 | parent = sco_get_sock_listen(conn->src); | |
858 | if (!parent) | |
859 | goto done; | |
860 | ||
861 | bh_lock_sock(parent); | |
862 | ||
b9dbdbc1 | 863 | sk = sco_sock_alloc(sock_net(parent), NULL, |
be7c2b99 | 864 | BTPROTO_SCO, GFP_ATOMIC); |
1da177e4 LT |
865 | if (!sk) { |
866 | bh_unlock_sock(parent); | |
867 | goto done; | |
868 | } | |
869 | ||
870 | sco_sock_init(sk, parent); | |
871 | ||
872 | bacpy(&bt_sk(sk)->src, conn->src); | |
873 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
874 | ||
875 | hci_conn_hold(conn->hcon); | |
876 | __sco_chan_add(conn, sk, parent); | |
877 | ||
878 | sk->sk_state = BT_CONNECTED; | |
879 | ||
880 | /* Wake up parent */ | |
881 | parent->sk_data_ready(parent, 1); | |
882 | ||
883 | bh_unlock_sock(parent); | |
884 | } | |
885 | ||
886 | done: | |
887 | sco_conn_unlock(conn); | |
888 | } | |
889 | ||
890 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
686ebf28 | 891 | int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1da177e4 | 892 | { |
fc5fef61 | 893 | struct sock *sk; |
71aeeaa1 MH |
894 | struct hlist_node *node; |
895 | int lm = 0; | |
896 | ||
1da177e4 LT |
897 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
898 | ||
71aeeaa1 MH |
899 | /* Find listening sockets */ |
900 | read_lock(&sco_sk_list.lock); | |
901 | sk_for_each(sk, node, &sco_sk_list.head) { | |
902 | if (sk->sk_state != BT_LISTEN) | |
903 | continue; | |
904 | ||
905 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || | |
be7c2b99 | 906 | !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
71aeeaa1 MH |
907 | lm |= HCI_LM_ACCEPT; |
908 | break; | |
909 | } | |
910 | } | |
911 | read_unlock(&sco_sk_list.lock); | |
912 | ||
913 | return lm; | |
1da177e4 LT |
914 | } |
915 | ||
9e664631 | 916 | void sco_connect_cfm(struct hci_conn *hcon, __u8 status) |
1da177e4 LT |
917 | { |
918 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
1da177e4 LT |
919 | if (!status) { |
920 | struct sco_conn *conn; | |
921 | ||
519e42b3 | 922 | conn = sco_conn_add(hcon); |
1da177e4 LT |
923 | if (conn) |
924 | sco_conn_ready(conn); | |
8e87d142 | 925 | } else |
e175072f | 926 | sco_conn_del(hcon, bt_to_errno(status)); |
1da177e4 LT |
927 | } |
928 | ||
9e664631 | 929 | void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
1da177e4 LT |
930 | { |
931 | BT_DBG("hcon %p reason %d", hcon, reason); | |
932 | ||
e175072f | 933 | sco_conn_del(hcon, bt_to_errno(reason)); |
1da177e4 LT |
934 | } |
935 | ||
686ebf28 | 936 | int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) |
1da177e4 LT |
937 | { |
938 | struct sco_conn *conn = hcon->sco_data; | |
939 | ||
940 | if (!conn) | |
941 | goto drop; | |
942 | ||
943 | BT_DBG("conn %p len %d", conn, skb->len); | |
944 | ||
945 | if (skb->len) { | |
946 | sco_recv_frame(conn, skb); | |
947 | return 0; | |
948 | } | |
949 | ||
950 | drop: | |
8e87d142 | 951 | kfree_skb(skb); |
1da177e4 LT |
952 | return 0; |
953 | } | |
954 | ||
aef7d97c | 955 | static int sco_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
956 | { |
957 | struct sock *sk; | |
958 | struct hlist_node *node; | |
1da177e4 | 959 | |
ee65d19e | 960 | read_lock(&sco_sk_list.lock); |
1da177e4 | 961 | |
be9d1227 | 962 | sk_for_each(sk, node, &sco_sk_list.head) { |
aef7d97c | 963 | seq_printf(f, "%s %s %d\n", batostr(&bt_sk(sk)->src), |
be7c2b99 | 964 | batostr(&bt_sk(sk)->dst), sk->sk_state); |
be9d1227 | 965 | } |
1da177e4 | 966 | |
ee65d19e | 967 | read_unlock(&sco_sk_list.lock); |
1da177e4 | 968 | |
aef7d97c | 969 | return 0; |
1da177e4 LT |
970 | } |
971 | ||
aef7d97c MH |
972 | static int sco_debugfs_open(struct inode *inode, struct file *file) |
973 | { | |
974 | return single_open(file, sco_debugfs_show, inode->i_private); | |
975 | } | |
976 | ||
977 | static const struct file_operations sco_debugfs_fops = { | |
978 | .open = sco_debugfs_open, | |
979 | .read = seq_read, | |
980 | .llseek = seq_lseek, | |
981 | .release = single_release, | |
982 | }; | |
983 | ||
984 | static struct dentry *sco_debugfs; | |
1da177e4 | 985 | |
90ddc4f0 | 986 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
987 | .family = PF_BLUETOOTH, |
988 | .owner = THIS_MODULE, | |
989 | .release = sco_sock_release, | |
990 | .bind = sco_sock_bind, | |
991 | .connect = sco_sock_connect, | |
992 | .listen = sco_sock_listen, | |
993 | .accept = sco_sock_accept, | |
994 | .getname = sco_sock_getname, | |
995 | .sendmsg = sco_sock_sendmsg, | |
996 | .recvmsg = bt_sock_recvmsg, | |
997 | .poll = bt_sock_poll, | |
3241ad82 | 998 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
999 | .mmap = sock_no_mmap, |
1000 | .socketpair = sock_no_socketpair, | |
fd0b3ff7 | 1001 | .shutdown = sco_sock_shutdown, |
1da177e4 LT |
1002 | .setsockopt = sco_sock_setsockopt, |
1003 | .getsockopt = sco_sock_getsockopt | |
1004 | }; | |
1005 | ||
ec1b4cf7 | 1006 | static const struct net_proto_family sco_sock_family_ops = { |
1da177e4 LT |
1007 | .family = PF_BLUETOOTH, |
1008 | .owner = THIS_MODULE, | |
1009 | .create = sco_sock_create, | |
1010 | }; | |
1011 | ||
64274518 | 1012 | int __init sco_init(void) |
1da177e4 LT |
1013 | { |
1014 | int err; | |
1015 | ||
1016 | err = proto_register(&sco_proto, 0); | |
1017 | if (err < 0) | |
1018 | return err; | |
1019 | ||
1020 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1021 | if (err < 0) { | |
1022 | BT_ERR("SCO socket registration failed"); | |
1023 | goto error; | |
1024 | } | |
1025 | ||
aef7d97c | 1026 | if (bt_debugfs) { |
be7c2b99 GP |
1027 | sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs, |
1028 | NULL, &sco_debugfs_fops); | |
aef7d97c MH |
1029 | if (!sco_debugfs) |
1030 | BT_ERR("Failed to create SCO debug file"); | |
1031 | } | |
1da177e4 | 1032 | |
1da177e4 LT |
1033 | BT_INFO("SCO socket layer initialized"); |
1034 | ||
1035 | return 0; | |
1036 | ||
1037 | error: | |
1038 | proto_unregister(&sco_proto); | |
1039 | return err; | |
1040 | } | |
1041 | ||
64274518 | 1042 | void __exit sco_exit(void) |
1da177e4 | 1043 | { |
aef7d97c | 1044 | debugfs_remove(sco_debugfs); |
1da177e4 LT |
1045 | |
1046 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1047 | BT_ERR("SCO socket unregistration failed"); | |
1048 | ||
1da177e4 LT |
1049 | proto_unregister(&sco_proto); |
1050 | } | |
1051 | ||
7cb127d5 MH |
1052 | module_param(disable_esco, bool, 0644); |
1053 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); |