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); | |
269c4845 GP |
134 | |
135 | sco_conn_lock(conn); | |
136 | conn->sk = NULL; | |
137 | sco_pi(sk)->conn = NULL; | |
138 | sco_conn_unlock(conn); | |
139 | ||
140 | if (conn->hcon) | |
141 | hci_conn_put(conn->hcon); | |
142 | ||
1da177e4 LT |
143 | sco_sock_kill(sk); |
144 | } | |
145 | ||
146 | hcon->sco_data = NULL; | |
147 | kfree(conn); | |
148 | return 0; | |
149 | } | |
150 | ||
6039aa73 GP |
151 | static int sco_chan_add(struct sco_conn *conn, struct sock *sk, |
152 | struct sock *parent) | |
1da177e4 LT |
153 | { |
154 | int err = 0; | |
155 | ||
156 | sco_conn_lock(conn); | |
b9dbdbc1 | 157 | if (conn->sk) |
1da177e4 | 158 | err = -EBUSY; |
b9dbdbc1 | 159 | else |
1da177e4 | 160 | __sco_chan_add(conn, sk, parent); |
b9dbdbc1 | 161 | |
1da177e4 LT |
162 | sco_conn_unlock(conn); |
163 | return err; | |
164 | } | |
165 | ||
166 | static int sco_connect(struct sock *sk) | |
167 | { | |
168 | bdaddr_t *src = &bt_sk(sk)->src; | |
169 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
170 | struct sco_conn *conn; | |
171 | struct hci_conn *hcon; | |
172 | struct hci_dev *hdev; | |
b6a0dc82 | 173 | int err, type; |
1da177e4 LT |
174 | |
175 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
176 | ||
735cbc47 AE |
177 | hdev = hci_get_route(dst, src); |
178 | if (!hdev) | |
1da177e4 LT |
179 | return -EHOSTUNREACH; |
180 | ||
09fd0de5 | 181 | hci_dev_lock(hdev); |
1da177e4 | 182 | |
7cb127d5 MH |
183 | if (lmp_esco_capable(hdev) && !disable_esco) |
184 | type = ESCO_LINK; | |
185 | else | |
186 | type = SCO_LINK; | |
b6a0dc82 | 187 | |
b12f62cf AG |
188 | hcon = hci_connect(hdev, type, dst, BDADDR_BREDR, BT_SECURITY_LOW, |
189 | HCI_AT_NO_BONDING); | |
30e76272 VT |
190 | if (IS_ERR(hcon)) { |
191 | err = PTR_ERR(hcon); | |
1da177e4 | 192 | goto done; |
30e76272 | 193 | } |
1da177e4 | 194 | |
519e42b3 | 195 | conn = sco_conn_add(hcon); |
1da177e4 LT |
196 | if (!conn) { |
197 | hci_conn_put(hcon); | |
30e76272 | 198 | err = -ENOMEM; |
1da177e4 LT |
199 | goto done; |
200 | } | |
201 | ||
202 | /* Update source addr of the socket */ | |
203 | bacpy(src, conn->src); | |
204 | ||
205 | err = sco_chan_add(conn, sk, NULL); | |
206 | if (err) | |
207 | goto done; | |
208 | ||
209 | if (hcon->state == BT_CONNECTED) { | |
210 | sco_sock_clear_timer(sk); | |
211 | sk->sk_state = BT_CONNECTED; | |
212 | } else { | |
213 | sk->sk_state = BT_CONNECT; | |
214 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
215 | } | |
b6a0dc82 | 216 | |
1da177e4 | 217 | done: |
09fd0de5 | 218 | hci_dev_unlock(hdev); |
1da177e4 LT |
219 | hci_dev_put(hdev); |
220 | return err; | |
221 | } | |
222 | ||
6039aa73 | 223 | static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) |
1da177e4 LT |
224 | { |
225 | struct sco_conn *conn = sco_pi(sk)->conn; | |
226 | struct sk_buff *skb; | |
088ce088 | 227 | int err; |
1da177e4 LT |
228 | |
229 | /* Check outgoing MTU */ | |
230 | if (len > conn->mtu) | |
231 | return -EINVAL; | |
232 | ||
233 | BT_DBG("sk %p len %d", sk, len); | |
234 | ||
088ce088 | 235 | skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err); |
b9dbdbc1 | 236 | if (!skb) |
1da177e4 LT |
237 | return err; |
238 | ||
088ce088 | 239 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { |
b9dbdbc1 GP |
240 | kfree_skb(skb); |
241 | return -EFAULT; | |
1da177e4 LT |
242 | } |
243 | ||
0d861d8b | 244 | hci_send_sco(conn->hcon, skb); |
1da177e4 | 245 | |
088ce088 | 246 | return len; |
1da177e4 LT |
247 | } |
248 | ||
6039aa73 | 249 | static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) |
1da177e4 LT |
250 | { |
251 | struct sock *sk = sco_chan_get(conn); | |
252 | ||
253 | if (!sk) | |
254 | goto drop; | |
255 | ||
256 | BT_DBG("sk %p len %d", sk, skb->len); | |
257 | ||
258 | if (sk->sk_state != BT_CONNECTED) | |
259 | goto drop; | |
260 | ||
261 | if (!sock_queue_rcv_skb(sk, skb)) | |
262 | return; | |
263 | ||
264 | drop: | |
265 | kfree_skb(skb); | |
1da177e4 LT |
266 | } |
267 | ||
268 | /* -------- Socket interface ---------- */ | |
fb334059 | 269 | static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba) |
1da177e4 | 270 | { |
1da177e4 | 271 | struct hlist_node *node; |
fb334059 MH |
272 | struct sock *sk; |
273 | ||
274 | sk_for_each(sk, node, &sco_sk_list.head) { | |
275 | if (sk->sk_state != BT_LISTEN) | |
276 | continue; | |
1da177e4 | 277 | |
1da177e4 | 278 | if (!bacmp(&bt_sk(sk)->src, ba)) |
fb334059 MH |
279 | return sk; |
280 | } | |
281 | ||
282 | return NULL; | |
1da177e4 LT |
283 | } |
284 | ||
285 | /* Find socket listening on source bdaddr. | |
286 | * Returns closest match. | |
287 | */ | |
288 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
289 | { | |
290 | struct sock *sk = NULL, *sk1 = NULL; | |
291 | struct hlist_node *node; | |
292 | ||
293 | read_lock(&sco_sk_list.lock); | |
294 | ||
295 | sk_for_each(sk, node, &sco_sk_list.head) { | |
296 | if (sk->sk_state != BT_LISTEN) | |
297 | continue; | |
298 | ||
299 | /* Exact match. */ | |
300 | if (!bacmp(&bt_sk(sk)->src, src)) | |
301 | break; | |
302 | ||
303 | /* Closest match */ | |
304 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
305 | sk1 = sk; | |
306 | } | |
307 | ||
308 | read_unlock(&sco_sk_list.lock); | |
309 | ||
310 | return node ? sk : sk1; | |
311 | } | |
312 | ||
313 | static void sco_sock_destruct(struct sock *sk) | |
314 | { | |
315 | BT_DBG("sk %p", sk); | |
316 | ||
317 | skb_queue_purge(&sk->sk_receive_queue); | |
318 | skb_queue_purge(&sk->sk_write_queue); | |
319 | } | |
320 | ||
321 | static void sco_sock_cleanup_listen(struct sock *parent) | |
322 | { | |
323 | struct sock *sk; | |
324 | ||
325 | BT_DBG("parent %p", parent); | |
326 | ||
327 | /* Close not yet accepted channels */ | |
328 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
329 | sco_sock_close(sk); | |
330 | sco_sock_kill(sk); | |
331 | } | |
332 | ||
333 | parent->sk_state = BT_CLOSED; | |
334 | sock_set_flag(parent, SOCK_ZAPPED); | |
335 | } | |
336 | ||
337 | /* Kill socket (only if zapped and orphan) | |
338 | * Must be called on unlocked socket. | |
339 | */ | |
340 | static void sco_sock_kill(struct sock *sk) | |
341 | { | |
342 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
343 | return; | |
344 | ||
345 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
346 | ||
347 | /* Kill poor orphan */ | |
348 | bt_sock_unlink(&sco_sk_list, sk); | |
349 | sock_set_flag(sk, SOCK_DEAD); | |
350 | sock_put(sk); | |
351 | } | |
352 | ||
fd0b3ff7 | 353 | static void __sco_sock_close(struct sock *sk) |
1da177e4 | 354 | { |
fd0b3ff7 | 355 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
1da177e4 LT |
356 | |
357 | switch (sk->sk_state) { | |
358 | case BT_LISTEN: | |
359 | sco_sock_cleanup_listen(sk); | |
360 | break; | |
361 | ||
362 | case BT_CONNECTED: | |
363 | case BT_CONFIG: | |
4a77708b LAD |
364 | if (sco_pi(sk)->conn) { |
365 | sk->sk_state = BT_DISCONN; | |
366 | sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); | |
367 | hci_conn_put(sco_pi(sk)->conn->hcon); | |
368 | sco_pi(sk)->conn->hcon = NULL; | |
369 | } else | |
370 | sco_chan_del(sk, ECONNRESET); | |
371 | break; | |
372 | ||
1da177e4 LT |
373 | case BT_CONNECT: |
374 | case BT_DISCONN: | |
375 | sco_chan_del(sk, ECONNRESET); | |
376 | break; | |
377 | ||
378 | default: | |
379 | sock_set_flag(sk, SOCK_ZAPPED); | |
380 | break; | |
3ff50b79 | 381 | } |
fd0b3ff7 | 382 | } |
1da177e4 | 383 | |
fd0b3ff7 MH |
384 | /* Must be called on unlocked socket. */ |
385 | static void sco_sock_close(struct sock *sk) | |
386 | { | |
387 | sco_sock_clear_timer(sk); | |
388 | lock_sock(sk); | |
389 | __sco_sock_close(sk); | |
1da177e4 | 390 | release_sock(sk); |
1da177e4 LT |
391 | sco_sock_kill(sk); |
392 | } | |
393 | ||
394 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
395 | { | |
396 | BT_DBG("sk %p", sk); | |
397 | ||
6230c9b4 | 398 | if (parent) { |
1da177e4 | 399 | sk->sk_type = parent->sk_type; |
6230c9b4 PM |
400 | security_sk_clone(parent, sk); |
401 | } | |
1da177e4 LT |
402 | } |
403 | ||
404 | static struct proto sco_proto = { | |
405 | .name = "SCO", | |
406 | .owner = THIS_MODULE, | |
407 | .obj_size = sizeof(struct sco_pinfo) | |
408 | }; | |
409 | ||
1b8d7ae4 | 410 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
411 | { |
412 | struct sock *sk; | |
413 | ||
6257ff21 | 414 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
415 | if (!sk) |
416 | return NULL; | |
417 | ||
418 | sock_init_data(sock, sk); | |
419 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
420 | ||
421 | sk->sk_destruct = sco_sock_destruct; | |
422 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
423 | ||
424 | sock_reset_flag(sk, SOCK_ZAPPED); | |
425 | ||
426 | sk->sk_protocol = proto; | |
427 | sk->sk_state = BT_OPEN; | |
428 | ||
b24b8a24 | 429 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
430 | |
431 | bt_sock_link(&sco_sk_list, sk); | |
432 | return sk; | |
433 | } | |
434 | ||
3f378b68 EP |
435 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol, |
436 | int kern) | |
1da177e4 LT |
437 | { |
438 | struct sock *sk; | |
439 | ||
440 | BT_DBG("sock %p", sock); | |
441 | ||
442 | sock->state = SS_UNCONNECTED; | |
443 | ||
444 | if (sock->type != SOCK_SEQPACKET) | |
445 | return -ESOCKTNOSUPPORT; | |
446 | ||
447 | sock->ops = &sco_sock_ops; | |
448 | ||
1b8d7ae4 | 449 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 450 | if (!sk) |
1da177e4 LT |
451 | return -ENOMEM; |
452 | ||
453 | sco_sock_init(sk, NULL); | |
454 | return 0; | |
455 | } | |
456 | ||
457 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
458 | { | |
459 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
460 | struct sock *sk = sock->sk; | |
1da177e4 LT |
461 | int err = 0; |
462 | ||
463 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
464 | ||
465 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
466 | return -EINVAL; | |
467 | ||
468 | lock_sock(sk); | |
469 | ||
470 | if (sk->sk_state != BT_OPEN) { | |
471 | err = -EBADFD; | |
472 | goto done; | |
473 | } | |
474 | ||
8ed21f7e MH |
475 | if (sk->sk_type != SOCK_SEQPACKET) { |
476 | err = -EINVAL; | |
477 | goto done; | |
1da177e4 LT |
478 | } |
479 | ||
8ed21f7e MH |
480 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); |
481 | ||
482 | sk->sk_state = BT_BOUND; | |
1da177e4 LT |
483 | |
484 | done: | |
485 | release_sock(sk); | |
486 | return err; | |
487 | } | |
488 | ||
489 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
490 | { | |
491 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
492 | struct sock *sk = sock->sk; | |
493 | int err = 0; | |
494 | ||
495 | ||
496 | BT_DBG("sk %p", sk); | |
497 | ||
6503d961 CG |
498 | if (alen < sizeof(struct sockaddr_sco) || |
499 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
500 | return -EINVAL; |
501 | ||
502 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
503 | return -EBADFD; | |
504 | ||
505 | if (sk->sk_type != SOCK_SEQPACKET) | |
506 | return -EINVAL; | |
507 | ||
508 | lock_sock(sk); | |
509 | ||
510 | /* Set destination address and psm */ | |
511 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
512 | ||
735cbc47 AE |
513 | err = sco_connect(sk); |
514 | if (err) | |
1da177e4 LT |
515 | goto done; |
516 | ||
8e87d142 | 517 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
be7c2b99 | 518 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
1da177e4 LT |
519 | |
520 | done: | |
521 | release_sock(sk); | |
522 | return err; | |
523 | } | |
524 | ||
525 | static int sco_sock_listen(struct socket *sock, int backlog) | |
526 | { | |
527 | struct sock *sk = sock->sk; | |
fb334059 | 528 | bdaddr_t *src = &bt_sk(sk)->src; |
1da177e4 LT |
529 | int err = 0; |
530 | ||
531 | BT_DBG("sk %p backlog %d", sk, backlog); | |
532 | ||
533 | lock_sock(sk); | |
534 | ||
7d5d775a | 535 | if (sk->sk_state != BT_BOUND) { |
1da177e4 LT |
536 | err = -EBADFD; |
537 | goto done; | |
538 | } | |
539 | ||
7d5d775a MH |
540 | if (sk->sk_type != SOCK_SEQPACKET) { |
541 | err = -EINVAL; | |
542 | goto done; | |
543 | } | |
544 | ||
fb334059 MH |
545 | write_lock(&sco_sk_list.lock); |
546 | ||
547 | if (__sco_get_sock_listen_by_addr(src)) { | |
548 | err = -EADDRINUSE; | |
549 | goto unlock; | |
550 | } | |
551 | ||
1da177e4 LT |
552 | sk->sk_max_ack_backlog = backlog; |
553 | sk->sk_ack_backlog = 0; | |
fb334059 | 554 | |
1da177e4 LT |
555 | sk->sk_state = BT_LISTEN; |
556 | ||
fb334059 MH |
557 | unlock: |
558 | write_unlock(&sco_sk_list.lock); | |
559 | ||
1da177e4 LT |
560 | done: |
561 | release_sock(sk); | |
562 | return err; | |
563 | } | |
564 | ||
565 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
566 | { | |
567 | DECLARE_WAITQUEUE(wait, current); | |
568 | struct sock *sk = sock->sk, *ch; | |
569 | long timeo; | |
570 | int err = 0; | |
571 | ||
572 | lock_sock(sk); | |
573 | ||
1da177e4 LT |
574 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
575 | ||
576 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
577 | ||
578 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 579 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
552b0d3c | 580 | while (1) { |
1da177e4 | 581 | set_current_state(TASK_INTERRUPTIBLE); |
552b0d3c PH |
582 | |
583 | if (sk->sk_state != BT_LISTEN) { | |
584 | err = -EBADFD; | |
1da177e4 LT |
585 | break; |
586 | } | |
587 | ||
552b0d3c PH |
588 | ch = bt_accept_dequeue(sk, newsock); |
589 | if (ch) | |
590 | break; | |
1da177e4 | 591 | |
552b0d3c PH |
592 | if (!timeo) { |
593 | err = -EAGAIN; | |
1da177e4 LT |
594 | break; |
595 | } | |
596 | ||
597 | if (signal_pending(current)) { | |
598 | err = sock_intr_errno(timeo); | |
599 | break; | |
600 | } | |
552b0d3c PH |
601 | |
602 | release_sock(sk); | |
603 | timeo = schedule_timeout(timeo); | |
604 | lock_sock(sk); | |
1da177e4 | 605 | } |
552b0d3c | 606 | __set_current_state(TASK_RUNNING); |
aa395145 | 607 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
608 | |
609 | if (err) | |
610 | goto done; | |
611 | ||
612 | newsock->state = SS_CONNECTED; | |
613 | ||
614 | BT_DBG("new socket %p", ch); | |
615 | ||
616 | done: | |
617 | release_sock(sk); | |
618 | return err; | |
619 | } | |
620 | ||
621 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
622 | { | |
623 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
624 | struct sock *sk = sock->sk; | |
625 | ||
626 | BT_DBG("sock %p, sk %p", sock, sk); | |
627 | ||
628 | addr->sa_family = AF_BLUETOOTH; | |
629 | *len = sizeof(struct sockaddr_sco); | |
630 | ||
631 | if (peer) | |
632 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
633 | else | |
634 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
635 | ||
636 | return 0; | |
637 | } | |
638 | ||
8e87d142 | 639 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
640 | struct msghdr *msg, size_t len) |
641 | { | |
642 | struct sock *sk = sock->sk; | |
b9dbdbc1 | 643 | int err; |
1da177e4 LT |
644 | |
645 | BT_DBG("sock %p, sk %p", sock, sk); | |
646 | ||
c1cbe4b7 BL |
647 | err = sock_error(sk); |
648 | if (err) | |
649 | return err; | |
1da177e4 LT |
650 | |
651 | if (msg->msg_flags & MSG_OOB) | |
652 | return -EOPNOTSUPP; | |
653 | ||
654 | lock_sock(sk); | |
655 | ||
656 | if (sk->sk_state == BT_CONNECTED) | |
657 | err = sco_send_frame(sk, msg, len); | |
658 | else | |
659 | err = -ENOTCONN; | |
660 | ||
661 | release_sock(sk); | |
662 | return err; | |
663 | } | |
664 | ||
b7058842 | 665 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
666 | { |
667 | struct sock *sk = sock->sk; | |
668 | int err = 0; | |
669 | ||
670 | BT_DBG("sk %p", sk); | |
671 | ||
672 | lock_sock(sk); | |
673 | ||
674 | switch (optname) { | |
675 | default: | |
676 | err = -ENOPROTOOPT; | |
677 | break; | |
678 | } | |
679 | ||
680 | release_sock(sk); | |
681 | return err; | |
682 | } | |
683 | ||
d58daf42 | 684 | static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
685 | { |
686 | struct sock *sk = sock->sk; | |
687 | struct sco_options opts; | |
688 | struct sco_conninfo cinfo; | |
8e87d142 | 689 | int len, err = 0; |
1da177e4 LT |
690 | |
691 | BT_DBG("sk %p", sk); | |
692 | ||
693 | if (get_user(len, optlen)) | |
694 | return -EFAULT; | |
695 | ||
696 | lock_sock(sk); | |
697 | ||
698 | switch (optname) { | |
699 | case SCO_OPTIONS: | |
700 | if (sk->sk_state != BT_CONNECTED) { | |
701 | err = -ENOTCONN; | |
702 | break; | |
703 | } | |
704 | ||
705 | opts.mtu = sco_pi(sk)->conn->mtu; | |
706 | ||
707 | BT_DBG("mtu %d", opts.mtu); | |
708 | ||
709 | len = min_t(unsigned int, len, sizeof(opts)); | |
710 | if (copy_to_user(optval, (char *)&opts, len)) | |
711 | err = -EFAULT; | |
712 | ||
713 | break; | |
714 | ||
715 | case SCO_CONNINFO: | |
716 | if (sk->sk_state != BT_CONNECTED) { | |
717 | err = -ENOTCONN; | |
718 | break; | |
719 | } | |
720 | ||
c4c896e1 | 721 | memset(&cinfo, 0, sizeof(cinfo)); |
1da177e4 LT |
722 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; |
723 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
724 | ||
725 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
726 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
727 | err = -EFAULT; | |
728 | ||
729 | break; | |
730 | ||
731 | default: | |
732 | err = -ENOPROTOOPT; | |
733 | break; | |
734 | } | |
735 | ||
736 | release_sock(sk); | |
737 | return err; | |
738 | } | |
739 | ||
d58daf42 MH |
740 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
741 | { | |
742 | struct sock *sk = sock->sk; | |
743 | int len, err = 0; | |
744 | ||
745 | BT_DBG("sk %p", sk); | |
746 | ||
747 | if (level == SOL_SCO) | |
748 | return sco_sock_getsockopt_old(sock, optname, optval, optlen); | |
749 | ||
750 | if (get_user(len, optlen)) | |
751 | return -EFAULT; | |
752 | ||
753 | lock_sock(sk); | |
754 | ||
755 | switch (optname) { | |
756 | default: | |
757 | err = -ENOPROTOOPT; | |
758 | break; | |
759 | } | |
760 | ||
761 | release_sock(sk); | |
762 | return err; | |
763 | } | |
764 | ||
fd0b3ff7 MH |
765 | static int sco_sock_shutdown(struct socket *sock, int how) |
766 | { | |
767 | struct sock *sk = sock->sk; | |
768 | int err = 0; | |
769 | ||
770 | BT_DBG("sock %p, sk %p", sock, sk); | |
771 | ||
772 | if (!sk) | |
773 | return 0; | |
774 | ||
775 | lock_sock(sk); | |
776 | if (!sk->sk_shutdown) { | |
777 | sk->sk_shutdown = SHUTDOWN_MASK; | |
778 | sco_sock_clear_timer(sk); | |
779 | __sco_sock_close(sk); | |
780 | ||
781 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
782 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
be7c2b99 | 783 | sk->sk_lingertime); |
fd0b3ff7 MH |
784 | } |
785 | release_sock(sk); | |
786 | return err; | |
787 | } | |
788 | ||
1da177e4 LT |
789 | static int sco_sock_release(struct socket *sock) |
790 | { | |
791 | struct sock *sk = sock->sk; | |
792 | int err = 0; | |
793 | ||
794 | BT_DBG("sock %p, sk %p", sock, sk); | |
795 | ||
796 | if (!sk) | |
797 | return 0; | |
798 | ||
799 | sco_sock_close(sk); | |
800 | ||
801 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
802 | lock_sock(sk); | |
803 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
804 | release_sock(sk); | |
805 | } | |
806 | ||
807 | sock_orphan(sk); | |
808 | sco_sock_kill(sk); | |
809 | return err; | |
810 | } | |
811 | ||
812 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
813 | { | |
814 | BT_DBG("conn %p", conn); | |
815 | ||
816 | sco_pi(sk)->conn = conn; | |
817 | conn->sk = sk; | |
818 | ||
819 | if (parent) | |
820 | bt_accept_enqueue(parent, sk); | |
821 | } | |
822 | ||
8e87d142 | 823 | /* Delete channel. |
1da177e4 LT |
824 | * Must be called on the locked socket. */ |
825 | static void sco_chan_del(struct sock *sk, int err) | |
826 | { | |
827 | struct sco_conn *conn; | |
828 | ||
829 | conn = sco_pi(sk)->conn; | |
830 | ||
831 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
832 | ||
1da177e4 LT |
833 | sk->sk_state = BT_CLOSED; |
834 | sk->sk_err = err; | |
835 | sk->sk_state_change(sk); | |
836 | ||
837 | sock_set_flag(sk, SOCK_ZAPPED); | |
838 | } | |
839 | ||
840 | static void sco_conn_ready(struct sco_conn *conn) | |
841 | { | |
735cbc47 AE |
842 | struct sock *parent; |
843 | struct sock *sk = conn->sk; | |
1da177e4 LT |
844 | |
845 | BT_DBG("conn %p", conn); | |
846 | ||
847 | sco_conn_lock(conn); | |
848 | ||
735cbc47 | 849 | if (sk) { |
1da177e4 LT |
850 | sco_sock_clear_timer(sk); |
851 | bh_lock_sock(sk); | |
852 | sk->sk_state = BT_CONNECTED; | |
853 | sk->sk_state_change(sk); | |
854 | bh_unlock_sock(sk); | |
855 | } else { | |
856 | parent = sco_get_sock_listen(conn->src); | |
857 | if (!parent) | |
858 | goto done; | |
859 | ||
860 | bh_lock_sock(parent); | |
861 | ||
b9dbdbc1 | 862 | sk = sco_sock_alloc(sock_net(parent), NULL, |
be7c2b99 | 863 | BTPROTO_SCO, GFP_ATOMIC); |
1da177e4 LT |
864 | if (!sk) { |
865 | bh_unlock_sock(parent); | |
866 | goto done; | |
867 | } | |
868 | ||
869 | sco_sock_init(sk, parent); | |
870 | ||
871 | bacpy(&bt_sk(sk)->src, conn->src); | |
872 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
873 | ||
874 | hci_conn_hold(conn->hcon); | |
875 | __sco_chan_add(conn, sk, parent); | |
876 | ||
877 | sk->sk_state = BT_CONNECTED; | |
878 | ||
879 | /* Wake up parent */ | |
880 | parent->sk_data_ready(parent, 1); | |
881 | ||
882 | bh_unlock_sock(parent); | |
883 | } | |
884 | ||
885 | done: | |
886 | sco_conn_unlock(conn); | |
887 | } | |
888 | ||
889 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
686ebf28 | 890 | int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1da177e4 | 891 | { |
fc5fef61 | 892 | struct sock *sk; |
71aeeaa1 MH |
893 | struct hlist_node *node; |
894 | int lm = 0; | |
895 | ||
1da177e4 LT |
896 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
897 | ||
71aeeaa1 MH |
898 | /* Find listening sockets */ |
899 | read_lock(&sco_sk_list.lock); | |
900 | sk_for_each(sk, node, &sco_sk_list.head) { | |
901 | if (sk->sk_state != BT_LISTEN) | |
902 | continue; | |
903 | ||
904 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || | |
be7c2b99 | 905 | !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
71aeeaa1 MH |
906 | lm |= HCI_LM_ACCEPT; |
907 | break; | |
908 | } | |
909 | } | |
910 | read_unlock(&sco_sk_list.lock); | |
911 | ||
912 | return lm; | |
1da177e4 LT |
913 | } |
914 | ||
686ebf28 | 915 | int sco_connect_cfm(struct hci_conn *hcon, __u8 status) |
1da177e4 LT |
916 | { |
917 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
1da177e4 LT |
918 | if (!status) { |
919 | struct sco_conn *conn; | |
920 | ||
519e42b3 | 921 | conn = sco_conn_add(hcon); |
1da177e4 LT |
922 | if (conn) |
923 | sco_conn_ready(conn); | |
8e87d142 | 924 | } else |
e175072f | 925 | sco_conn_del(hcon, bt_to_errno(status)); |
1da177e4 LT |
926 | |
927 | return 0; | |
928 | } | |
929 | ||
686ebf28 | 930 | int sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
1da177e4 LT |
931 | { |
932 | BT_DBG("hcon %p reason %d", hcon, reason); | |
933 | ||
e175072f | 934 | sco_conn_del(hcon, bt_to_errno(reason)); |
1da177e4 LT |
935 | return 0; |
936 | } | |
937 | ||
686ebf28 | 938 | int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) |
1da177e4 LT |
939 | { |
940 | struct sco_conn *conn = hcon->sco_data; | |
941 | ||
942 | if (!conn) | |
943 | goto drop; | |
944 | ||
945 | BT_DBG("conn %p len %d", conn, skb->len); | |
946 | ||
947 | if (skb->len) { | |
948 | sco_recv_frame(conn, skb); | |
949 | return 0; | |
950 | } | |
951 | ||
952 | drop: | |
8e87d142 | 953 | kfree_skb(skb); |
1da177e4 LT |
954 | return 0; |
955 | } | |
956 | ||
aef7d97c | 957 | static int sco_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
958 | { |
959 | struct sock *sk; | |
960 | struct hlist_node *node; | |
1da177e4 | 961 | |
ee65d19e | 962 | read_lock(&sco_sk_list.lock); |
1da177e4 | 963 | |
be9d1227 | 964 | sk_for_each(sk, node, &sco_sk_list.head) { |
aef7d97c | 965 | seq_printf(f, "%s %s %d\n", batostr(&bt_sk(sk)->src), |
be7c2b99 | 966 | batostr(&bt_sk(sk)->dst), sk->sk_state); |
be9d1227 | 967 | } |
1da177e4 | 968 | |
ee65d19e | 969 | read_unlock(&sco_sk_list.lock); |
1da177e4 | 970 | |
aef7d97c | 971 | return 0; |
1da177e4 LT |
972 | } |
973 | ||
aef7d97c MH |
974 | static int sco_debugfs_open(struct inode *inode, struct file *file) |
975 | { | |
976 | return single_open(file, sco_debugfs_show, inode->i_private); | |
977 | } | |
978 | ||
979 | static const struct file_operations sco_debugfs_fops = { | |
980 | .open = sco_debugfs_open, | |
981 | .read = seq_read, | |
982 | .llseek = seq_lseek, | |
983 | .release = single_release, | |
984 | }; | |
985 | ||
986 | static struct dentry *sco_debugfs; | |
1da177e4 | 987 | |
90ddc4f0 | 988 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
989 | .family = PF_BLUETOOTH, |
990 | .owner = THIS_MODULE, | |
991 | .release = sco_sock_release, | |
992 | .bind = sco_sock_bind, | |
993 | .connect = sco_sock_connect, | |
994 | .listen = sco_sock_listen, | |
995 | .accept = sco_sock_accept, | |
996 | .getname = sco_sock_getname, | |
997 | .sendmsg = sco_sock_sendmsg, | |
998 | .recvmsg = bt_sock_recvmsg, | |
999 | .poll = bt_sock_poll, | |
3241ad82 | 1000 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
1001 | .mmap = sock_no_mmap, |
1002 | .socketpair = sock_no_socketpair, | |
fd0b3ff7 | 1003 | .shutdown = sco_sock_shutdown, |
1da177e4 LT |
1004 | .setsockopt = sco_sock_setsockopt, |
1005 | .getsockopt = sco_sock_getsockopt | |
1006 | }; | |
1007 | ||
ec1b4cf7 | 1008 | static const struct net_proto_family sco_sock_family_ops = { |
1da177e4 LT |
1009 | .family = PF_BLUETOOTH, |
1010 | .owner = THIS_MODULE, | |
1011 | .create = sco_sock_create, | |
1012 | }; | |
1013 | ||
64274518 | 1014 | int __init sco_init(void) |
1da177e4 LT |
1015 | { |
1016 | int err; | |
1017 | ||
1018 | err = proto_register(&sco_proto, 0); | |
1019 | if (err < 0) | |
1020 | return err; | |
1021 | ||
1022 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1023 | if (err < 0) { | |
1024 | BT_ERR("SCO socket registration failed"); | |
1025 | goto error; | |
1026 | } | |
1027 | ||
aef7d97c | 1028 | if (bt_debugfs) { |
be7c2b99 GP |
1029 | sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs, |
1030 | NULL, &sco_debugfs_fops); | |
aef7d97c MH |
1031 | if (!sco_debugfs) |
1032 | BT_ERR("Failed to create SCO debug file"); | |
1033 | } | |
1da177e4 | 1034 | |
1da177e4 LT |
1035 | BT_INFO("SCO socket layer initialized"); |
1036 | ||
1037 | return 0; | |
1038 | ||
1039 | error: | |
1040 | proto_unregister(&sco_proto); | |
1041 | return err; | |
1042 | } | |
1043 | ||
64274518 | 1044 | void __exit sco_exit(void) |
1da177e4 | 1045 | { |
aef7d97c | 1046 | debugfs_remove(sco_debugfs); |
1da177e4 LT |
1047 | |
1048 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1049 | BT_ERR("SCO socket unregistration failed"); | |
1050 | ||
1da177e4 LT |
1051 | proto_unregister(&sco_proto); |
1052 | } | |
1053 | ||
7cb127d5 MH |
1054 | module_param(disable_esco, bool, 0644); |
1055 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); |