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 | { |
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: | |
b7e98b51 | 355 | if (sco_pi(sk)->conn->hcon) { |
4a77708b LAD |
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 | ||
eb20ff9c | 364 | case BT_CONNECT2: |
1da177e4 LT |
365 | case BT_CONNECT: |
366 | case BT_DISCONN: | |
367 | sco_chan_del(sk, ECONNRESET); | |
368 | break; | |
369 | ||
370 | default: | |
371 | sock_set_flag(sk, SOCK_ZAPPED); | |
372 | break; | |
3ff50b79 | 373 | } |
fd0b3ff7 | 374 | } |
1da177e4 | 375 | |
fd0b3ff7 MH |
376 | /* Must be called on unlocked socket. */ |
377 | static void sco_sock_close(struct sock *sk) | |
378 | { | |
379 | sco_sock_clear_timer(sk); | |
380 | lock_sock(sk); | |
381 | __sco_sock_close(sk); | |
1da177e4 | 382 | release_sock(sk); |
1da177e4 LT |
383 | sco_sock_kill(sk); |
384 | } | |
385 | ||
386 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
387 | { | |
388 | BT_DBG("sk %p", sk); | |
389 | ||
6230c9b4 | 390 | if (parent) { |
1da177e4 | 391 | sk->sk_type = parent->sk_type; |
20714bfe | 392 | bt_sk(sk)->flags = bt_sk(parent)->flags; |
6230c9b4 PM |
393 | security_sk_clone(parent, sk); |
394 | } | |
1da177e4 LT |
395 | } |
396 | ||
397 | static struct proto sco_proto = { | |
398 | .name = "SCO", | |
399 | .owner = THIS_MODULE, | |
400 | .obj_size = sizeof(struct sco_pinfo) | |
401 | }; | |
402 | ||
1b8d7ae4 | 403 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
404 | { |
405 | struct sock *sk; | |
406 | ||
6257ff21 | 407 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
408 | if (!sk) |
409 | return NULL; | |
410 | ||
411 | sock_init_data(sock, sk); | |
412 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
413 | ||
414 | sk->sk_destruct = sco_sock_destruct; | |
415 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
416 | ||
417 | sock_reset_flag(sk, SOCK_ZAPPED); | |
418 | ||
419 | sk->sk_protocol = proto; | |
420 | sk->sk_state = BT_OPEN; | |
421 | ||
b24b8a24 | 422 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
423 | |
424 | bt_sock_link(&sco_sk_list, sk); | |
425 | return sk; | |
426 | } | |
427 | ||
3f378b68 EP |
428 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol, |
429 | int kern) | |
1da177e4 LT |
430 | { |
431 | struct sock *sk; | |
432 | ||
433 | BT_DBG("sock %p", sock); | |
434 | ||
435 | sock->state = SS_UNCONNECTED; | |
436 | ||
437 | if (sock->type != SOCK_SEQPACKET) | |
438 | return -ESOCKTNOSUPPORT; | |
439 | ||
440 | sock->ops = &sco_sock_ops; | |
441 | ||
1b8d7ae4 | 442 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 443 | if (!sk) |
1da177e4 LT |
444 | return -ENOMEM; |
445 | ||
446 | sco_sock_init(sk, NULL); | |
447 | return 0; | |
448 | } | |
449 | ||
450 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
451 | { | |
452 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
453 | struct sock *sk = sock->sk; | |
1da177e4 LT |
454 | int err = 0; |
455 | ||
6ed93dc6 | 456 | BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr); |
1da177e4 LT |
457 | |
458 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
459 | return -EINVAL; | |
460 | ||
461 | lock_sock(sk); | |
462 | ||
463 | if (sk->sk_state != BT_OPEN) { | |
464 | err = -EBADFD; | |
465 | goto done; | |
466 | } | |
467 | ||
8ed21f7e MH |
468 | if (sk->sk_type != SOCK_SEQPACKET) { |
469 | err = -EINVAL; | |
470 | goto done; | |
1da177e4 LT |
471 | } |
472 | ||
8ed21f7e MH |
473 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); |
474 | ||
475 | sk->sk_state = BT_BOUND; | |
1da177e4 LT |
476 | |
477 | done: | |
478 | release_sock(sk); | |
479 | return err; | |
480 | } | |
481 | ||
482 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
483 | { | |
484 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
485 | struct sock *sk = sock->sk; | |
486 | int err = 0; | |
487 | ||
488 | ||
489 | BT_DBG("sk %p", sk); | |
490 | ||
6503d961 CG |
491 | if (alen < sizeof(struct sockaddr_sco) || |
492 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
493 | return -EINVAL; |
494 | ||
495 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
496 | return -EBADFD; | |
497 | ||
498 | if (sk->sk_type != SOCK_SEQPACKET) | |
499 | return -EINVAL; | |
500 | ||
501 | lock_sock(sk); | |
502 | ||
503 | /* Set destination address and psm */ | |
504 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
505 | ||
735cbc47 AE |
506 | err = sco_connect(sk); |
507 | if (err) | |
1da177e4 LT |
508 | goto done; |
509 | ||
8e87d142 | 510 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
be7c2b99 | 511 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
1da177e4 LT |
512 | |
513 | done: | |
514 | release_sock(sk); | |
515 | return err; | |
516 | } | |
517 | ||
518 | static int sco_sock_listen(struct socket *sock, int backlog) | |
519 | { | |
520 | struct sock *sk = sock->sk; | |
fb334059 | 521 | bdaddr_t *src = &bt_sk(sk)->src; |
1da177e4 LT |
522 | int err = 0; |
523 | ||
524 | BT_DBG("sk %p backlog %d", sk, backlog); | |
525 | ||
526 | lock_sock(sk); | |
527 | ||
7d5d775a | 528 | if (sk->sk_state != BT_BOUND) { |
1da177e4 LT |
529 | err = -EBADFD; |
530 | goto done; | |
531 | } | |
532 | ||
7d5d775a MH |
533 | if (sk->sk_type != SOCK_SEQPACKET) { |
534 | err = -EINVAL; | |
535 | goto done; | |
536 | } | |
537 | ||
fb334059 MH |
538 | write_lock(&sco_sk_list.lock); |
539 | ||
540 | if (__sco_get_sock_listen_by_addr(src)) { | |
541 | err = -EADDRINUSE; | |
542 | goto unlock; | |
543 | } | |
544 | ||
1da177e4 LT |
545 | sk->sk_max_ack_backlog = backlog; |
546 | sk->sk_ack_backlog = 0; | |
fb334059 | 547 | |
1da177e4 LT |
548 | sk->sk_state = BT_LISTEN; |
549 | ||
fb334059 MH |
550 | unlock: |
551 | write_unlock(&sco_sk_list.lock); | |
552 | ||
1da177e4 LT |
553 | done: |
554 | release_sock(sk); | |
555 | return err; | |
556 | } | |
557 | ||
558 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
559 | { | |
560 | DECLARE_WAITQUEUE(wait, current); | |
561 | struct sock *sk = sock->sk, *ch; | |
562 | long timeo; | |
563 | int err = 0; | |
564 | ||
565 | lock_sock(sk); | |
566 | ||
1da177e4 LT |
567 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
568 | ||
569 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
570 | ||
571 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 572 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
552b0d3c | 573 | while (1) { |
1da177e4 | 574 | set_current_state(TASK_INTERRUPTIBLE); |
552b0d3c PH |
575 | |
576 | if (sk->sk_state != BT_LISTEN) { | |
577 | err = -EBADFD; | |
1da177e4 LT |
578 | break; |
579 | } | |
580 | ||
552b0d3c PH |
581 | ch = bt_accept_dequeue(sk, newsock); |
582 | if (ch) | |
583 | break; | |
1da177e4 | 584 | |
552b0d3c PH |
585 | if (!timeo) { |
586 | err = -EAGAIN; | |
1da177e4 LT |
587 | break; |
588 | } | |
589 | ||
590 | if (signal_pending(current)) { | |
591 | err = sock_intr_errno(timeo); | |
592 | break; | |
593 | } | |
552b0d3c PH |
594 | |
595 | release_sock(sk); | |
596 | timeo = schedule_timeout(timeo); | |
597 | lock_sock(sk); | |
1da177e4 | 598 | } |
552b0d3c | 599 | __set_current_state(TASK_RUNNING); |
aa395145 | 600 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
601 | |
602 | if (err) | |
603 | goto done; | |
604 | ||
605 | newsock->state = SS_CONNECTED; | |
606 | ||
607 | BT_DBG("new socket %p", ch); | |
608 | ||
609 | done: | |
610 | release_sock(sk); | |
611 | return err; | |
612 | } | |
613 | ||
614 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
615 | { | |
616 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
617 | struct sock *sk = sock->sk; | |
618 | ||
619 | BT_DBG("sock %p, sk %p", sock, sk); | |
620 | ||
621 | addr->sa_family = AF_BLUETOOTH; | |
622 | *len = sizeof(struct sockaddr_sco); | |
623 | ||
624 | if (peer) | |
625 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
626 | else | |
627 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
8e87d142 | 632 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
633 | struct msghdr *msg, size_t len) |
634 | { | |
635 | struct sock *sk = sock->sk; | |
b9dbdbc1 | 636 | int err; |
1da177e4 LT |
637 | |
638 | BT_DBG("sock %p, sk %p", sock, sk); | |
639 | ||
c1cbe4b7 BL |
640 | err = sock_error(sk); |
641 | if (err) | |
642 | return err; | |
1da177e4 LT |
643 | |
644 | if (msg->msg_flags & MSG_OOB) | |
645 | return -EOPNOTSUPP; | |
646 | ||
647 | lock_sock(sk); | |
648 | ||
649 | if (sk->sk_state == BT_CONNECTED) | |
650 | err = sco_send_frame(sk, msg, len); | |
651 | else | |
652 | err = -ENOTCONN; | |
653 | ||
654 | release_sock(sk); | |
655 | return err; | |
656 | } | |
657 | ||
20714bfe FD |
658 | static int sco_sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
659 | struct msghdr *msg, size_t len, int flags) | |
660 | { | |
661 | struct sock *sk = sock->sk; | |
662 | struct sco_pinfo *pi = sco_pi(sk); | |
663 | ||
664 | lock_sock(sk); | |
665 | ||
666 | if (sk->sk_state == BT_CONNECT2 && | |
667 | test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { | |
668 | hci_conn_accept(pi->conn->hcon, 0); | |
669 | sk->sk_state = BT_CONFIG; | |
670 | ||
671 | release_sock(sk); | |
672 | return 0; | |
673 | } | |
674 | ||
675 | release_sock(sk); | |
676 | ||
677 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); | |
678 | } | |
679 | ||
b7058842 | 680 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
681 | { |
682 | struct sock *sk = sock->sk; | |
683 | int err = 0; | |
b96e9c67 | 684 | u32 opt; |
1da177e4 LT |
685 | |
686 | BT_DBG("sk %p", sk); | |
687 | ||
688 | lock_sock(sk); | |
689 | ||
690 | switch (optname) { | |
b96e9c67 FD |
691 | |
692 | case BT_DEFER_SETUP: | |
693 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
694 | err = -EINVAL; | |
695 | break; | |
696 | } | |
697 | ||
698 | if (get_user(opt, (u32 __user *) optval)) { | |
699 | err = -EFAULT; | |
700 | break; | |
701 | } | |
702 | ||
703 | if (opt) | |
704 | set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
705 | else | |
706 | clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); | |
707 | break; | |
708 | ||
1da177e4 LT |
709 | default: |
710 | err = -ENOPROTOOPT; | |
711 | break; | |
712 | } | |
713 | ||
714 | release_sock(sk); | |
715 | return err; | |
716 | } | |
717 | ||
d58daf42 | 718 | static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
719 | { |
720 | struct sock *sk = sock->sk; | |
721 | struct sco_options opts; | |
722 | struct sco_conninfo cinfo; | |
8e87d142 | 723 | int len, err = 0; |
1da177e4 LT |
724 | |
725 | BT_DBG("sk %p", sk); | |
726 | ||
727 | if (get_user(len, optlen)) | |
728 | return -EFAULT; | |
729 | ||
730 | lock_sock(sk); | |
731 | ||
732 | switch (optname) { | |
733 | case SCO_OPTIONS: | |
734 | if (sk->sk_state != BT_CONNECTED) { | |
735 | err = -ENOTCONN; | |
736 | break; | |
737 | } | |
738 | ||
739 | opts.mtu = sco_pi(sk)->conn->mtu; | |
740 | ||
741 | BT_DBG("mtu %d", opts.mtu); | |
742 | ||
743 | len = min_t(unsigned int, len, sizeof(opts)); | |
744 | if (copy_to_user(optval, (char *)&opts, len)) | |
745 | err = -EFAULT; | |
746 | ||
747 | break; | |
748 | ||
749 | case SCO_CONNINFO: | |
750 | if (sk->sk_state != BT_CONNECTED) { | |
751 | err = -ENOTCONN; | |
752 | break; | |
753 | } | |
754 | ||
c4c896e1 | 755 | memset(&cinfo, 0, sizeof(cinfo)); |
1da177e4 LT |
756 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; |
757 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
758 | ||
759 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
760 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
761 | err = -EFAULT; | |
762 | ||
763 | break; | |
764 | ||
765 | default: | |
766 | err = -ENOPROTOOPT; | |
767 | break; | |
768 | } | |
769 | ||
770 | release_sock(sk); | |
771 | return err; | |
772 | } | |
773 | ||
d58daf42 MH |
774 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
775 | { | |
776 | struct sock *sk = sock->sk; | |
777 | int len, err = 0; | |
778 | ||
779 | BT_DBG("sk %p", sk); | |
780 | ||
781 | if (level == SOL_SCO) | |
782 | return sco_sock_getsockopt_old(sock, optname, optval, optlen); | |
783 | ||
784 | if (get_user(len, optlen)) | |
785 | return -EFAULT; | |
786 | ||
787 | lock_sock(sk); | |
788 | ||
789 | switch (optname) { | |
b96e9c67 FD |
790 | |
791 | case BT_DEFER_SETUP: | |
792 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
793 | err = -EINVAL; | |
794 | break; | |
795 | } | |
796 | ||
797 | if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), | |
798 | (u32 __user *) optval)) | |
799 | err = -EFAULT; | |
800 | ||
801 | break; | |
802 | ||
d58daf42 MH |
803 | default: |
804 | err = -ENOPROTOOPT; | |
805 | break; | |
806 | } | |
807 | ||
808 | release_sock(sk); | |
809 | return err; | |
810 | } | |
811 | ||
fd0b3ff7 MH |
812 | static int sco_sock_shutdown(struct socket *sock, int how) |
813 | { | |
814 | struct sock *sk = sock->sk; | |
815 | int err = 0; | |
816 | ||
817 | BT_DBG("sock %p, sk %p", sock, sk); | |
818 | ||
819 | if (!sk) | |
820 | return 0; | |
821 | ||
822 | lock_sock(sk); | |
823 | if (!sk->sk_shutdown) { | |
824 | sk->sk_shutdown = SHUTDOWN_MASK; | |
825 | sco_sock_clear_timer(sk); | |
826 | __sco_sock_close(sk); | |
827 | ||
828 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
829 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
be7c2b99 | 830 | sk->sk_lingertime); |
fd0b3ff7 MH |
831 | } |
832 | release_sock(sk); | |
833 | return err; | |
834 | } | |
835 | ||
1da177e4 LT |
836 | static int sco_sock_release(struct socket *sock) |
837 | { | |
838 | struct sock *sk = sock->sk; | |
839 | int err = 0; | |
840 | ||
841 | BT_DBG("sock %p, sk %p", sock, sk); | |
842 | ||
843 | if (!sk) | |
844 | return 0; | |
845 | ||
846 | sco_sock_close(sk); | |
847 | ||
848 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
849 | lock_sock(sk); | |
850 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
851 | release_sock(sk); | |
852 | } | |
853 | ||
854 | sock_orphan(sk); | |
855 | sco_sock_kill(sk); | |
856 | return err; | |
857 | } | |
858 | ||
859 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
860 | { | |
861 | BT_DBG("conn %p", conn); | |
862 | ||
863 | sco_pi(sk)->conn = conn; | |
864 | conn->sk = sk; | |
865 | ||
866 | if (parent) | |
867 | bt_accept_enqueue(parent, sk); | |
868 | } | |
869 | ||
8e87d142 | 870 | /* Delete channel. |
1da177e4 LT |
871 | * Must be called on the locked socket. */ |
872 | static void sco_chan_del(struct sock *sk, int err) | |
873 | { | |
874 | struct sco_conn *conn; | |
875 | ||
876 | conn = sco_pi(sk)->conn; | |
877 | ||
878 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
879 | ||
0b27a4b9 GP |
880 | if (conn) { |
881 | sco_conn_lock(conn); | |
882 | conn->sk = NULL; | |
883 | sco_pi(sk)->conn = NULL; | |
884 | sco_conn_unlock(conn); | |
885 | ||
886 | if (conn->hcon) | |
887 | hci_conn_put(conn->hcon); | |
888 | } | |
889 | ||
1da177e4 LT |
890 | sk->sk_state = BT_CLOSED; |
891 | sk->sk_err = err; | |
892 | sk->sk_state_change(sk); | |
893 | ||
894 | sock_set_flag(sk, SOCK_ZAPPED); | |
895 | } | |
896 | ||
897 | static void sco_conn_ready(struct sco_conn *conn) | |
898 | { | |
735cbc47 AE |
899 | struct sock *parent; |
900 | struct sock *sk = conn->sk; | |
1da177e4 LT |
901 | |
902 | BT_DBG("conn %p", conn); | |
903 | ||
904 | sco_conn_lock(conn); | |
905 | ||
735cbc47 | 906 | if (sk) { |
1da177e4 LT |
907 | sco_sock_clear_timer(sk); |
908 | bh_lock_sock(sk); | |
909 | sk->sk_state = BT_CONNECTED; | |
910 | sk->sk_state_change(sk); | |
911 | bh_unlock_sock(sk); | |
912 | } else { | |
913 | parent = sco_get_sock_listen(conn->src); | |
914 | if (!parent) | |
915 | goto done; | |
916 | ||
917 | bh_lock_sock(parent); | |
918 | ||
b9dbdbc1 | 919 | sk = sco_sock_alloc(sock_net(parent), NULL, |
be7c2b99 | 920 | BTPROTO_SCO, GFP_ATOMIC); |
1da177e4 LT |
921 | if (!sk) { |
922 | bh_unlock_sock(parent); | |
923 | goto done; | |
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); | |
943 | } | |
944 | ||
945 | done: | |
946 | sco_conn_unlock(conn); | |
947 | } | |
948 | ||
949 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
20714bfe | 950 | int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags) |
1da177e4 | 951 | { |
fc5fef61 | 952 | struct sock *sk; |
71aeeaa1 MH |
953 | struct hlist_node *node; |
954 | int lm = 0; | |
955 | ||
6ed93dc6 | 956 | BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr); |
1da177e4 | 957 | |
71aeeaa1 MH |
958 | /* Find listening sockets */ |
959 | read_lock(&sco_sk_list.lock); | |
960 | sk_for_each(sk, node, &sco_sk_list.head) { | |
961 | if (sk->sk_state != BT_LISTEN) | |
962 | continue; | |
963 | ||
964 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || | |
be7c2b99 | 965 | !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
71aeeaa1 | 966 | lm |= HCI_LM_ACCEPT; |
20714bfe FD |
967 | |
968 | if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) | |
969 | *flags |= HCI_PROTO_DEFER; | |
71aeeaa1 MH |
970 | break; |
971 | } | |
972 | } | |
973 | read_unlock(&sco_sk_list.lock); | |
974 | ||
975 | return lm; | |
1da177e4 LT |
976 | } |
977 | ||
9e664631 | 978 | void sco_connect_cfm(struct hci_conn *hcon, __u8 status) |
1da177e4 | 979 | { |
6ed93dc6 | 980 | BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status); |
1da177e4 LT |
981 | if (!status) { |
982 | struct sco_conn *conn; | |
983 | ||
519e42b3 | 984 | conn = sco_conn_add(hcon); |
1da177e4 LT |
985 | if (conn) |
986 | sco_conn_ready(conn); | |
8e87d142 | 987 | } else |
e175072f | 988 | sco_conn_del(hcon, bt_to_errno(status)); |
1da177e4 LT |
989 | } |
990 | ||
9e664631 | 991 | void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
1da177e4 LT |
992 | { |
993 | BT_DBG("hcon %p reason %d", hcon, reason); | |
994 | ||
e175072f | 995 | sco_conn_del(hcon, bt_to_errno(reason)); |
1da177e4 LT |
996 | } |
997 | ||
686ebf28 | 998 | int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) |
1da177e4 LT |
999 | { |
1000 | struct sco_conn *conn = hcon->sco_data; | |
1001 | ||
1002 | if (!conn) | |
1003 | goto drop; | |
1004 | ||
1005 | BT_DBG("conn %p len %d", conn, skb->len); | |
1006 | ||
1007 | if (skb->len) { | |
1008 | sco_recv_frame(conn, skb); | |
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | drop: | |
8e87d142 | 1013 | kfree_skb(skb); |
1da177e4 LT |
1014 | return 0; |
1015 | } | |
1016 | ||
aef7d97c | 1017 | static int sco_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
1018 | { |
1019 | struct sock *sk; | |
1020 | struct hlist_node *node; | |
1da177e4 | 1021 | |
ee65d19e | 1022 | read_lock(&sco_sk_list.lock); |
1da177e4 | 1023 | |
be9d1227 | 1024 | sk_for_each(sk, node, &sco_sk_list.head) { |
fcb73338 AE |
1025 | seq_printf(f, "%pMR %pMR %d\n", &bt_sk(sk)->src, |
1026 | &bt_sk(sk)->dst, sk->sk_state); | |
be9d1227 | 1027 | } |
1da177e4 | 1028 | |
ee65d19e | 1029 | read_unlock(&sco_sk_list.lock); |
1da177e4 | 1030 | |
aef7d97c | 1031 | return 0; |
1da177e4 LT |
1032 | } |
1033 | ||
aef7d97c MH |
1034 | static int sco_debugfs_open(struct inode *inode, struct file *file) |
1035 | { | |
1036 | return single_open(file, sco_debugfs_show, inode->i_private); | |
1037 | } | |
1038 | ||
1039 | static const struct file_operations sco_debugfs_fops = { | |
1040 | .open = sco_debugfs_open, | |
1041 | .read = seq_read, | |
1042 | .llseek = seq_lseek, | |
1043 | .release = single_release, | |
1044 | }; | |
1045 | ||
1046 | static struct dentry *sco_debugfs; | |
1da177e4 | 1047 | |
90ddc4f0 | 1048 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
1049 | .family = PF_BLUETOOTH, |
1050 | .owner = THIS_MODULE, | |
1051 | .release = sco_sock_release, | |
1052 | .bind = sco_sock_bind, | |
1053 | .connect = sco_sock_connect, | |
1054 | .listen = sco_sock_listen, | |
1055 | .accept = sco_sock_accept, | |
1056 | .getname = sco_sock_getname, | |
1057 | .sendmsg = sco_sock_sendmsg, | |
20714bfe | 1058 | .recvmsg = sco_sock_recvmsg, |
1da177e4 | 1059 | .poll = bt_sock_poll, |
3241ad82 | 1060 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
1061 | .mmap = sock_no_mmap, |
1062 | .socketpair = sock_no_socketpair, | |
fd0b3ff7 | 1063 | .shutdown = sco_sock_shutdown, |
1da177e4 LT |
1064 | .setsockopt = sco_sock_setsockopt, |
1065 | .getsockopt = sco_sock_getsockopt | |
1066 | }; | |
1067 | ||
ec1b4cf7 | 1068 | static const struct net_proto_family sco_sock_family_ops = { |
1da177e4 LT |
1069 | .family = PF_BLUETOOTH, |
1070 | .owner = THIS_MODULE, | |
1071 | .create = sco_sock_create, | |
1072 | }; | |
1073 | ||
64274518 | 1074 | int __init sco_init(void) |
1da177e4 LT |
1075 | { |
1076 | int err; | |
1077 | ||
1078 | err = proto_register(&sco_proto, 0); | |
1079 | if (err < 0) | |
1080 | return err; | |
1081 | ||
1082 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1083 | if (err < 0) { | |
1084 | BT_ERR("SCO socket registration failed"); | |
1085 | goto error; | |
1086 | } | |
1087 | ||
de9b9212 MY |
1088 | err = bt_procfs_init(THIS_MODULE, &init_net, "sco", &sco_sk_list, NULL); |
1089 | if (err < 0) { | |
1090 | BT_ERR("Failed to create SCO proc file"); | |
1091 | bt_sock_unregister(BTPROTO_SCO); | |
1092 | goto error; | |
1093 | } | |
1094 | ||
aef7d97c | 1095 | if (bt_debugfs) { |
be7c2b99 GP |
1096 | sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs, |
1097 | NULL, &sco_debugfs_fops); | |
aef7d97c MH |
1098 | if (!sco_debugfs) |
1099 | BT_ERR("Failed to create SCO debug file"); | |
1100 | } | |
1da177e4 | 1101 | |
1da177e4 LT |
1102 | BT_INFO("SCO socket layer initialized"); |
1103 | ||
1104 | return 0; | |
1105 | ||
1106 | error: | |
1107 | proto_unregister(&sco_proto); | |
1108 | return err; | |
1109 | } | |
1110 | ||
64274518 | 1111 | void __exit sco_exit(void) |
1da177e4 | 1112 | { |
de9b9212 MY |
1113 | bt_procfs_cleanup(&init_net, "sco"); |
1114 | ||
aef7d97c | 1115 | debugfs_remove(sco_debugfs); |
1da177e4 LT |
1116 | |
1117 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1118 | BT_ERR("SCO socket unregistration failed"); | |
1119 | ||
1da177e4 LT |
1120 | proto_unregister(&sco_proto); |
1121 | } | |
1122 | ||
7cb127d5 MH |
1123 | module_param(disable_esco, bool, 0644); |
1124 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); |