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 | 165 | |
6ed93dc6 | 166 | BT_DBG("%pMR -> %pMR", src, dst); |
1da177e4 | 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 | { |
fb334059 MH |
262 | struct sock *sk; |
263 | ||
b67bfe0d | 264 | sk_for_each(sk, &sco_sk_list.head) { |
fb334059 MH |
265 | if (sk->sk_state != BT_LISTEN) |
266 | continue; | |
1da177e4 | 267 | |
1da177e4 | 268 | if (!bacmp(&bt_sk(sk)->src, ba)) |
fb334059 MH |
269 | return sk; |
270 | } | |
271 | ||
272 | return NULL; | |
1da177e4 LT |
273 | } |
274 | ||
275 | /* Find socket listening on source bdaddr. | |
276 | * Returns closest match. | |
277 | */ | |
278 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
279 | { | |
280 | struct sock *sk = NULL, *sk1 = NULL; | |
1da177e4 LT |
281 | |
282 | read_lock(&sco_sk_list.lock); | |
283 | ||
b67bfe0d | 284 | sk_for_each(sk, &sco_sk_list.head) { |
1da177e4 LT |
285 | if (sk->sk_state != BT_LISTEN) |
286 | continue; | |
287 | ||
288 | /* Exact match. */ | |
289 | if (!bacmp(&bt_sk(sk)->src, src)) | |
290 | break; | |
291 | ||
292 | /* Closest match */ | |
293 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
294 | sk1 = sk; | |
295 | } | |
296 | ||
297 | read_unlock(&sco_sk_list.lock); | |
298 | ||
b67bfe0d | 299 | return sk ? sk : sk1; |
1da177e4 LT |
300 | } |
301 | ||
302 | static void sco_sock_destruct(struct sock *sk) | |
303 | { | |
304 | BT_DBG("sk %p", sk); | |
305 | ||
306 | skb_queue_purge(&sk->sk_receive_queue); | |
307 | skb_queue_purge(&sk->sk_write_queue); | |
308 | } | |
309 | ||
310 | static void sco_sock_cleanup_listen(struct sock *parent) | |
311 | { | |
312 | struct sock *sk; | |
313 | ||
314 | BT_DBG("parent %p", parent); | |
315 | ||
316 | /* Close not yet accepted channels */ | |
317 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
318 | sco_sock_close(sk); | |
319 | sco_sock_kill(sk); | |
320 | } | |
321 | ||
322 | parent->sk_state = BT_CLOSED; | |
323 | sock_set_flag(parent, SOCK_ZAPPED); | |
324 | } | |
325 | ||
326 | /* Kill socket (only if zapped and orphan) | |
327 | * Must be called on unlocked socket. | |
328 | */ | |
329 | static void sco_sock_kill(struct sock *sk) | |
330 | { | |
331 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
332 | return; | |
333 | ||
334 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
335 | ||
336 | /* Kill poor orphan */ | |
337 | bt_sock_unlink(&sco_sk_list, sk); | |
338 | sock_set_flag(sk, SOCK_DEAD); | |
339 | sock_put(sk); | |
340 | } | |
341 | ||
fd0b3ff7 | 342 | static void __sco_sock_close(struct sock *sk) |
1da177e4 | 343 | { |
fd0b3ff7 | 344 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
1da177e4 LT |
345 | |
346 | switch (sk->sk_state) { | |
347 | case BT_LISTEN: | |
348 | sco_sock_cleanup_listen(sk); | |
349 | break; | |
350 | ||
351 | case BT_CONNECTED: | |
352 | case BT_CONFIG: | |
b7e98b51 | 353 | if (sco_pi(sk)->conn->hcon) { |
4a77708b LAD |
354 | sk->sk_state = BT_DISCONN; |
355 | sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); | |
356 | hci_conn_put(sco_pi(sk)->conn->hcon); | |
357 | sco_pi(sk)->conn->hcon = NULL; | |
358 | } else | |
359 | sco_chan_del(sk, ECONNRESET); | |
360 | break; | |
361 | ||
1da177e4 LT |
362 | case BT_CONNECT: |
363 | case BT_DISCONN: | |
364 | sco_chan_del(sk, ECONNRESET); | |
365 | break; | |
366 | ||
367 | default: | |
368 | sock_set_flag(sk, SOCK_ZAPPED); | |
369 | break; | |
3ff50b79 | 370 | } |
fd0b3ff7 | 371 | } |
1da177e4 | 372 | |
fd0b3ff7 MH |
373 | /* Must be called on unlocked socket. */ |
374 | static void sco_sock_close(struct sock *sk) | |
375 | { | |
376 | sco_sock_clear_timer(sk); | |
377 | lock_sock(sk); | |
378 | __sco_sock_close(sk); | |
1da177e4 | 379 | release_sock(sk); |
1da177e4 LT |
380 | sco_sock_kill(sk); |
381 | } | |
382 | ||
383 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
384 | { | |
385 | BT_DBG("sk %p", sk); | |
386 | ||
6230c9b4 | 387 | if (parent) { |
1da177e4 | 388 | sk->sk_type = parent->sk_type; |
20714bfe | 389 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
6230c9b4 PM |
390 | security_sk_clone(parent, sk); |
391 | } | |
1da177e4 LT |
392 | } |
393 | ||
394 | static struct proto sco_proto = { | |
395 | .name = "SCO", | |
396 | .owner = THIS_MODULE, | |
397 | .obj_size = sizeof(struct sco_pinfo) | |
398 | }; | |
399 | ||
1b8d7ae4 | 400 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
401 | { |
402 | struct sock *sk; | |
403 | ||
6257ff21 | 404 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
405 | if (!sk) |
406 | return NULL; | |
407 | ||
408 | sock_init_data(sock, sk); | |
409 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
410 | ||
411 | sk->sk_destruct = sco_sock_destruct; | |
412 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
413 | ||
414 | sock_reset_flag(sk, SOCK_ZAPPED); | |
415 | ||
416 | sk->sk_protocol = proto; | |
417 | sk->sk_state = BT_OPEN; | |
418 | ||
b24b8a24 | 419 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
420 | |
421 | bt_sock_link(&sco_sk_list, sk); | |
422 | return sk; | |
423 | } | |
424 | ||
3f378b68 EP |
425 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol, |
426 | int kern) | |
1da177e4 LT |
427 | { |
428 | struct sock *sk; | |
429 | ||
430 | BT_DBG("sock %p", sock); | |
431 | ||
432 | sock->state = SS_UNCONNECTED; | |
433 | ||
434 | if (sock->type != SOCK_SEQPACKET) | |
435 | return -ESOCKTNOSUPPORT; | |
436 | ||
437 | sock->ops = &sco_sock_ops; | |
438 | ||
1b8d7ae4 | 439 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 440 | if (!sk) |
1da177e4 LT |
441 | return -ENOMEM; |
442 | ||
443 | sco_sock_init(sk, NULL); | |
444 | return 0; | |
445 | } | |
446 | ||
447 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
448 | { | |
449 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
450 | struct sock *sk = sock->sk; | |
1da177e4 LT |
451 | int err = 0; |
452 | ||
6ed93dc6 | 453 | BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr); |
1da177e4 LT |
454 | |
455 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
456 | return -EINVAL; | |
457 | ||
458 | lock_sock(sk); | |
459 | ||
460 | if (sk->sk_state != BT_OPEN) { | |
461 | err = -EBADFD; | |
462 | goto done; | |
463 | } | |
464 | ||
8ed21f7e MH |
465 | if (sk->sk_type != SOCK_SEQPACKET) { |
466 | err = -EINVAL; | |
467 | goto done; | |
1da177e4 LT |
468 | } |
469 | ||
8ed21f7e MH |
470 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); |
471 | ||
472 | sk->sk_state = BT_BOUND; | |
1da177e4 LT |
473 | |
474 | done: | |
475 | release_sock(sk); | |
476 | return err; | |
477 | } | |
478 | ||
479 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
480 | { | |
481 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
482 | struct sock *sk = sock->sk; | |
483 | int err = 0; | |
484 | ||
485 | ||
486 | BT_DBG("sk %p", sk); | |
487 | ||
6503d961 CG |
488 | if (alen < sizeof(struct sockaddr_sco) || |
489 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
490 | return -EINVAL; |
491 | ||
492 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
493 | return -EBADFD; | |
494 | ||
495 | if (sk->sk_type != SOCK_SEQPACKET) | |
496 | return -EINVAL; | |
497 | ||
498 | lock_sock(sk); | |
499 | ||
500 | /* Set destination address and psm */ | |
501 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
502 | ||
735cbc47 AE |
503 | err = sco_connect(sk); |
504 | if (err) | |
1da177e4 LT |
505 | goto done; |
506 | ||
8e87d142 | 507 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
be7c2b99 | 508 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
1da177e4 LT |
509 | |
510 | done: | |
511 | release_sock(sk); | |
512 | return err; | |
513 | } | |
514 | ||
515 | static int sco_sock_listen(struct socket *sock, int backlog) | |
516 | { | |
517 | struct sock *sk = sock->sk; | |
fb334059 | 518 | bdaddr_t *src = &bt_sk(sk)->src; |
1da177e4 LT |
519 | int err = 0; |
520 | ||
521 | BT_DBG("sk %p backlog %d", sk, backlog); | |
522 | ||
523 | lock_sock(sk); | |
524 | ||
7d5d775a | 525 | if (sk->sk_state != BT_BOUND) { |
1da177e4 LT |
526 | err = -EBADFD; |
527 | goto done; | |
528 | } | |
529 | ||
7d5d775a MH |
530 | if (sk->sk_type != SOCK_SEQPACKET) { |
531 | err = -EINVAL; | |
532 | goto done; | |
533 | } | |
534 | ||
fb334059 MH |
535 | write_lock(&sco_sk_list.lock); |
536 | ||
537 | if (__sco_get_sock_listen_by_addr(src)) { | |
538 | err = -EADDRINUSE; | |
539 | goto unlock; | |
540 | } | |
541 | ||
1da177e4 LT |
542 | sk->sk_max_ack_backlog = backlog; |
543 | sk->sk_ack_backlog = 0; | |
fb334059 | 544 | |
1da177e4 LT |
545 | sk->sk_state = BT_LISTEN; |
546 | ||
fb334059 MH |
547 | unlock: |
548 | write_unlock(&sco_sk_list.lock); | |
549 | ||
1da177e4 LT |
550 | done: |
551 | release_sock(sk); | |
552 | return err; | |
553 | } | |
554 | ||
555 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
556 | { | |
557 | DECLARE_WAITQUEUE(wait, current); | |
558 | struct sock *sk = sock->sk, *ch; | |
559 | long timeo; | |
560 | int err = 0; | |
561 | ||
562 | lock_sock(sk); | |
563 | ||
1da177e4 LT |
564 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
565 | ||
566 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
567 | ||
568 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 569 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
552b0d3c | 570 | while (1) { |
1da177e4 | 571 | set_current_state(TASK_INTERRUPTIBLE); |
552b0d3c PH |
572 | |
573 | if (sk->sk_state != BT_LISTEN) { | |
574 | err = -EBADFD; | |
1da177e4 LT |
575 | break; |
576 | } | |
577 | ||
552b0d3c PH |
578 | ch = bt_accept_dequeue(sk, newsock); |
579 | if (ch) | |
580 | break; | |
1da177e4 | 581 | |
552b0d3c PH |
582 | if (!timeo) { |
583 | err = -EAGAIN; | |
1da177e4 LT |
584 | break; |
585 | } | |
586 | ||
587 | if (signal_pending(current)) { | |
588 | err = sock_intr_errno(timeo); | |
589 | break; | |
590 | } | |
552b0d3c PH |
591 | |
592 | release_sock(sk); | |
593 | timeo = schedule_timeout(timeo); | |
594 | lock_sock(sk); | |
1da177e4 | 595 | } |
552b0d3c | 596 | __set_current_state(TASK_RUNNING); |
aa395145 | 597 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
598 | |
599 | if (err) | |
600 | goto done; | |
601 | ||
602 | newsock->state = SS_CONNECTED; | |
603 | ||
604 | BT_DBG("new socket %p", ch); | |
605 | ||
606 | done: | |
607 | release_sock(sk); | |
608 | return err; | |
609 | } | |
610 | ||
611 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
612 | { | |
613 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
614 | struct sock *sk = sock->sk; | |
615 | ||
616 | BT_DBG("sock %p, sk %p", sock, sk); | |
617 | ||
618 | addr->sa_family = AF_BLUETOOTH; | |
619 | *len = sizeof(struct sockaddr_sco); | |
620 | ||
621 | if (peer) | |
622 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
623 | else | |
624 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
625 | ||
626 | return 0; | |
627 | } | |
628 | ||
8e87d142 | 629 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
630 | struct msghdr *msg, size_t len) |
631 | { | |
632 | struct sock *sk = sock->sk; | |
b9dbdbc1 | 633 | int err; |
1da177e4 LT |
634 | |
635 | BT_DBG("sock %p, sk %p", sock, sk); | |
636 | ||
c1cbe4b7 BL |
637 | err = sock_error(sk); |
638 | if (err) | |
639 | return err; | |
1da177e4 LT |
640 | |
641 | if (msg->msg_flags & MSG_OOB) | |
642 | return -EOPNOTSUPP; | |
643 | ||
644 | lock_sock(sk); | |
645 | ||
646 | if (sk->sk_state == BT_CONNECTED) | |
647 | err = sco_send_frame(sk, msg, len); | |
648 | else | |
649 | err = -ENOTCONN; | |
650 | ||
651 | release_sock(sk); | |
652 | return err; | |
653 | } | |
654 | ||
20714bfe FD |
655 | static int sco_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
656 | struct msghdr *msg, size_t len, int flags) | |
657 | { | |
658 | struct sock *sk = sock->sk; | |
659 | struct sco_pinfo *pi = sco_pi(sk); | |
660 | ||
661 | lock_sock(sk); | |
662 | ||
663 | if (sk->sk_state == BT_CONNECT2 && | |
664 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { | |
665 | hci_conn_accept(pi->conn->hcon, 0); | |
666 | sk->sk_state = BT_CONFIG; | |
667 | ||
668 | release_sock(sk); | |
669 | return 0; | |
670 | } | |
671 | ||
672 | release_sock(sk); | |
673 | ||
674 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
675 | } | |
676 | ||
b7058842 | 677 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
678 | { |
679 | struct sock *sk = sock->sk; | |
680 | int err = 0; | |
b96e9c67 | 681 | u32 opt; |
1da177e4 LT |
682 | |
683 | BT_DBG("sk %p", sk); | |
684 | ||
685 | lock_sock(sk); | |
686 | ||
687 | switch (optname) { | |
b96e9c67 FD |
688 | |
689 | case BT_DEFER_SETUP: | |
690 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
691 | err = -EINVAL; | |
692 | break; | |
693 | } | |
694 | ||
695 | if (get_user(opt, (u32 __user *) optval)) { | |
696 | err = -EFAULT; | |
697 | break; | |
698 | } | |
699 | ||
700 | if (opt) | |
701 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
702 | else | |
703 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
704 | break; | |
705 | ||
1da177e4 LT |
706 | default: |
707 | err = -ENOPROTOOPT; | |
708 | break; | |
709 | } | |
710 | ||
711 | release_sock(sk); | |
712 | return err; | |
713 | } | |
714 | ||
d58daf42 | 715 | static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
716 | { |
717 | struct sock *sk = sock->sk; | |
718 | struct sco_options opts; | |
719 | struct sco_conninfo cinfo; | |
8e87d142 | 720 | int len, err = 0; |
1da177e4 LT |
721 | |
722 | BT_DBG("sk %p", sk); | |
723 | ||
724 | if (get_user(len, optlen)) | |
725 | return -EFAULT; | |
726 | ||
727 | lock_sock(sk); | |
728 | ||
729 | switch (optname) { | |
730 | case SCO_OPTIONS: | |
731 | if (sk->sk_state != BT_CONNECTED) { | |
732 | err = -ENOTCONN; | |
733 | break; | |
734 | } | |
735 | ||
736 | opts.mtu = sco_pi(sk)->conn->mtu; | |
737 | ||
738 | BT_DBG("mtu %d", opts.mtu); | |
739 | ||
740 | len = min_t(unsigned int, len, sizeof(opts)); | |
741 | if (copy_to_user(optval, (char *)&opts, len)) | |
742 | err = -EFAULT; | |
743 | ||
744 | break; | |
745 | ||
746 | case SCO_CONNINFO: | |
747 | if (sk->sk_state != BT_CONNECTED) { | |
748 | err = -ENOTCONN; | |
749 | break; | |
750 | } | |
751 | ||
c4c896e1 | 752 | memset(&cinfo, 0, sizeof(cinfo)); |
1da177e4 LT |
753 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; |
754 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
755 | ||
756 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
757 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
758 | err = -EFAULT; | |
759 | ||
760 | break; | |
761 | ||
762 | default: | |
763 | err = -ENOPROTOOPT; | |
764 | break; | |
765 | } | |
766 | ||
767 | release_sock(sk); | |
768 | return err; | |
769 | } | |
770 | ||
d58daf42 MH |
771 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
772 | { | |
773 | struct sock *sk = sock->sk; | |
774 | int len, err = 0; | |
775 | ||
776 | BT_DBG("sk %p", sk); | |
777 | ||
778 | if (level == SOL_SCO) | |
779 | return sco_sock_getsockopt_old(sock, optname, optval, optlen); | |
780 | ||
781 | if (get_user(len, optlen)) | |
782 | return -EFAULT; | |
783 | ||
784 | lock_sock(sk); | |
785 | ||
786 | switch (optname) { | |
b96e9c67 FD |
787 | |
788 | case BT_DEFER_SETUP: | |
789 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
790 | err = -EINVAL; | |
791 | break; | |
792 | } | |
793 | ||
794 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), | |
795 | (u32 __user *) optval)) | |
796 | err = -EFAULT; | |
797 | ||
798 | break; | |
799 | ||
d58daf42 MH |
800 | default: |
801 | err = -ENOPROTOOPT; | |
802 | break; | |
803 | } | |
804 | ||
805 | release_sock(sk); | |
806 | return err; | |
807 | } | |
808 | ||
fd0b3ff7 MH |
809 | static int sco_sock_shutdown(struct socket *sock, int how) |
810 | { | |
811 | struct sock *sk = sock->sk; | |
812 | int err = 0; | |
813 | ||
814 | BT_DBG("sock %p, sk %p", sock, sk); | |
815 | ||
816 | if (!sk) | |
817 | return 0; | |
818 | ||
819 | lock_sock(sk); | |
820 | if (!sk->sk_shutdown) { | |
821 | sk->sk_shutdown = SHUTDOWN_MASK; | |
822 | sco_sock_clear_timer(sk); | |
823 | __sco_sock_close(sk); | |
824 | ||
825 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
826 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
be7c2b99 | 827 | sk->sk_lingertime); |
fd0b3ff7 MH |
828 | } |
829 | release_sock(sk); | |
830 | return err; | |
831 | } | |
832 | ||
1da177e4 LT |
833 | static int sco_sock_release(struct socket *sock) |
834 | { | |
835 | struct sock *sk = sock->sk; | |
836 | int err = 0; | |
837 | ||
838 | BT_DBG("sock %p, sk %p", sock, sk); | |
839 | ||
840 | if (!sk) | |
841 | return 0; | |
842 | ||
843 | sco_sock_close(sk); | |
844 | ||
845 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
846 | lock_sock(sk); | |
847 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
848 | release_sock(sk); | |
849 | } | |
850 | ||
851 | sock_orphan(sk); | |
852 | sco_sock_kill(sk); | |
853 | return err; | |
854 | } | |
855 | ||
856 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
857 | { | |
858 | BT_DBG("conn %p", conn); | |
859 | ||
860 | sco_pi(sk)->conn = conn; | |
861 | conn->sk = sk; | |
862 | ||
863 | if (parent) | |
864 | bt_accept_enqueue(parent, sk); | |
865 | } | |
866 | ||
8e87d142 | 867 | /* Delete channel. |
1da177e4 LT |
868 | * Must be called on the locked socket. */ |
869 | static void sco_chan_del(struct sock *sk, int err) | |
870 | { | |
871 | struct sco_conn *conn; | |
872 | ||
873 | conn = sco_pi(sk)->conn; | |
874 | ||
875 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
876 | ||
0b27a4b9 GP |
877 | if (conn) { |
878 | sco_conn_lock(conn); | |
879 | conn->sk = NULL; | |
880 | sco_pi(sk)->conn = NULL; | |
881 | sco_conn_unlock(conn); | |
882 | ||
883 | if (conn->hcon) | |
884 | hci_conn_put(conn->hcon); | |
885 | } | |
886 | ||
1da177e4 LT |
887 | sk->sk_state = BT_CLOSED; |
888 | sk->sk_err = err; | |
889 | sk->sk_state_change(sk); | |
890 | ||
891 | sock_set_flag(sk, SOCK_ZAPPED); | |
892 | } | |
893 | ||
894 | static void sco_conn_ready(struct sco_conn *conn) | |
895 | { | |
735cbc47 AE |
896 | struct sock *parent; |
897 | struct sock *sk = conn->sk; | |
1da177e4 LT |
898 | |
899 | BT_DBG("conn %p", conn); | |
900 | ||
735cbc47 | 901 | if (sk) { |
1da177e4 LT |
902 | sco_sock_clear_timer(sk); |
903 | bh_lock_sock(sk); | |
904 | sk->sk_state = BT_CONNECTED; | |
905 | sk->sk_state_change(sk); | |
906 | bh_unlock_sock(sk); | |
907 | } else { | |
40528088 AG |
908 | sco_conn_lock(conn); |
909 | ||
1da177e4 | 910 | parent = sco_get_sock_listen(conn->src); |
40528088 AG |
911 | if (!parent) { |
912 | sco_conn_unlock(conn); | |
913 | return; | |
914 | } | |
1da177e4 LT |
915 | |
916 | bh_lock_sock(parent); | |
917 | ||
b9dbdbc1 | 918 | sk = sco_sock_alloc(sock_net(parent), NULL, |
be7c2b99 | 919 | BTPROTO_SCO, GFP_ATOMIC); |
1da177e4 LT |
920 | if (!sk) { |
921 | bh_unlock_sock(parent); | |
40528088 AG |
922 | sco_conn_unlock(conn); |
923 | return; | |
1da177e4 LT |
924 | } |
925 | ||
926 | sco_sock_init(sk, parent); | |
927 | ||
928 | bacpy(&bt_sk(sk)->src, conn->src); | |
929 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
930 | ||
931 | hci_conn_hold(conn->hcon); | |
932 | __sco_chan_add(conn, sk, parent); | |
933 | ||
20714bfe FD |
934 | if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) |
935 | sk->sk_state = BT_CONNECT2; | |
936 | else | |
937 | sk->sk_state = BT_CONNECTED; | |
1da177e4 LT |
938 | |
939 | /* Wake up parent */ | |
940 | parent->sk_data_ready(parent, 1); | |
941 | ||
942 | bh_unlock_sock(parent); | |
1da177e4 | 943 | |
40528088 AG |
944 | sco_conn_unlock(conn); |
945 | } | |
1da177e4 LT |
946 | } |
947 | ||
948 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
20714bfe | 949 | int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags) |
1da177e4 | 950 | { |
fc5fef61 | 951 | struct sock *sk; |
71aeeaa1 MH |
952 | int lm = 0; |
953 | ||
6ed93dc6 | 954 | BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr); |
1da177e4 | 955 | |
71aeeaa1 MH |
956 | /* Find listening sockets */ |
957 | read_lock(&sco_sk_list.lock); | |
b67bfe0d | 958 | sk_for_each(sk, &sco_sk_list.head) { |
71aeeaa1 MH |
959 | if (sk->sk_state != BT_LISTEN) |
960 | continue; | |
961 | ||
962 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || | |
be7c2b99 | 963 | !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
71aeeaa1 | 964 | lm |= HCI_LM_ACCEPT; |
20714bfe FD |
965 | |
966 | if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) | |
967 | *flags |= HCI_PROTO_DEFER; | |
71aeeaa1 MH |
968 | break; |
969 | } | |
970 | } | |
971 | read_unlock(&sco_sk_list.lock); | |
972 | ||
973 | return lm; | |
1da177e4 LT |
974 | } |
975 | ||
9e664631 | 976 | void sco_connect_cfm(struct hci_conn *hcon, __u8 status) |
1da177e4 | 977 | { |
6ed93dc6 | 978 | BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status); |
1da177e4 LT |
979 | if (!status) { |
980 | struct sco_conn *conn; | |
981 | ||
519e42b3 | 982 | conn = sco_conn_add(hcon); |
1da177e4 LT |
983 | if (conn) |
984 | sco_conn_ready(conn); | |
8e87d142 | 985 | } else |
e175072f | 986 | sco_conn_del(hcon, bt_to_errno(status)); |
1da177e4 LT |
987 | } |
988 | ||
9e664631 | 989 | void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
1da177e4 LT |
990 | { |
991 | BT_DBG("hcon %p reason %d", hcon, reason); | |
992 | ||
e175072f | 993 | sco_conn_del(hcon, bt_to_errno(reason)); |
1da177e4 LT |
994 | } |
995 | ||
686ebf28 | 996 | int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) |
1da177e4 LT |
997 | { |
998 | struct sco_conn *conn = hcon->sco_data; | |
999 | ||
1000 | if (!conn) | |
1001 | goto drop; | |
1002 | ||
1003 | BT_DBG("conn %p len %d", conn, skb->len); | |
1004 | ||
1005 | if (skb->len) { | |
1006 | sco_recv_frame(conn, skb); | |
1007 | return 0; | |
1008 | } | |
1009 | ||
1010 | drop: | |
8e87d142 | 1011 | kfree_skb(skb); |
1da177e4 LT |
1012 | return 0; |
1013 | } | |
1014 | ||
aef7d97c | 1015 | static int sco_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
1016 | { |
1017 | struct sock *sk; | |
1da177e4 | 1018 | |
ee65d19e | 1019 | read_lock(&sco_sk_list.lock); |
1da177e4 | 1020 | |
b67bfe0d | 1021 | sk_for_each(sk, &sco_sk_list.head) { |
fcb73338 AE |
1022 | seq_printf(f, "%pMR %pMR %d\n", &bt_sk(sk)->src, |
1023 | &bt_sk(sk)->dst, sk->sk_state); | |
be9d1227 | 1024 | } |
1da177e4 | 1025 | |
ee65d19e | 1026 | read_unlock(&sco_sk_list.lock); |
1da177e4 | 1027 | |
aef7d97c | 1028 | return 0; |
1da177e4 LT |
1029 | } |
1030 | ||
aef7d97c MH |
1031 | static int sco_debugfs_open(struct inode *inode, struct file *file) |
1032 | { | |
1033 | return single_open(file, sco_debugfs_show, inode->i_private); | |
1034 | } | |
1035 | ||
1036 | static const struct file_operations sco_debugfs_fops = { | |
1037 | .open = sco_debugfs_open, | |
1038 | .read = seq_read, | |
1039 | .llseek = seq_lseek, | |
1040 | .release = single_release, | |
1041 | }; | |
1042 | ||
1043 | static struct dentry *sco_debugfs; | |
1da177e4 | 1044 | |
90ddc4f0 | 1045 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
1046 | .family = PF_BLUETOOTH, |
1047 | .owner = THIS_MODULE, | |
1048 | .release = sco_sock_release, | |
1049 | .bind = sco_sock_bind, | |
1050 | .connect = sco_sock_connect, | |
1051 | .listen = sco_sock_listen, | |
1052 | .accept = sco_sock_accept, | |
1053 | .getname = sco_sock_getname, | |
1054 | .sendmsg = sco_sock_sendmsg, | |
20714bfe | 1055 | .recvmsg = sco_sock_recvmsg, |
1da177e4 | 1056 | .poll = bt_sock_poll, |
3241ad82 | 1057 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
1058 | .mmap = sock_no_mmap, |
1059 | .socketpair = sock_no_socketpair, | |
fd0b3ff7 | 1060 | .shutdown = sco_sock_shutdown, |
1da177e4 LT |
1061 | .setsockopt = sco_sock_setsockopt, |
1062 | .getsockopt = sco_sock_getsockopt | |
1063 | }; | |
1064 | ||
ec1b4cf7 | 1065 | static const struct net_proto_family sco_sock_family_ops = { |
1da177e4 LT |
1066 | .family = PF_BLUETOOTH, |
1067 | .owner = THIS_MODULE, | |
1068 | .create = sco_sock_create, | |
1069 | }; | |
1070 | ||
64274518 | 1071 | int __init sco_init(void) |
1da177e4 LT |
1072 | { |
1073 | int err; | |
1074 | ||
1075 | err = proto_register(&sco_proto, 0); | |
1076 | if (err < 0) | |
1077 | return err; | |
1078 | ||
1079 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1080 | if (err < 0) { | |
1081 | BT_ERR("SCO socket registration failed"); | |
1082 | goto error; | |
1083 | } | |
1084 | ||
de9b9212 MY |
1085 | err = bt_procfs_init(THIS_MODULE, &init_net, "sco", &sco_sk_list, NULL); |
1086 | if (err < 0) { | |
1087 | BT_ERR("Failed to create SCO proc file"); | |
1088 | bt_sock_unregister(BTPROTO_SCO); | |
1089 | goto error; | |
1090 | } | |
1091 | ||
aef7d97c | 1092 | if (bt_debugfs) { |
be7c2b99 GP |
1093 | sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs, |
1094 | NULL, &sco_debugfs_fops); | |
aef7d97c MH |
1095 | if (!sco_debugfs) |
1096 | BT_ERR("Failed to create SCO debug file"); | |
1097 | } | |
1da177e4 | 1098 | |
1da177e4 LT |
1099 | BT_INFO("SCO socket layer initialized"); |
1100 | ||
1101 | return 0; | |
1102 | ||
1103 | error: | |
1104 | proto_unregister(&sco_proto); | |
1105 | return err; | |
1106 | } | |
1107 | ||
64274518 | 1108 | void __exit sco_exit(void) |
1da177e4 | 1109 | { |
de9b9212 MY |
1110 | bt_procfs_cleanup(&init_net, "sco"); |
1111 | ||
aef7d97c | 1112 | debugfs_remove(sco_debugfs); |
1da177e4 LT |
1113 | |
1114 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1115 | BT_ERR("SCO socket unregistration failed"); | |
1116 | ||
1da177e4 LT |
1117 | proto_unregister(&sco_proto); |
1118 | } | |
1119 | ||
7cb127d5 MH |
1120 | module_param(disable_esco, bool, 0644); |
1121 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); |