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Commit | Line | Data |
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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 LT |
27 | #include <linux/module.h> |
28 | ||
29 | #include <linux/types.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/kernel.h> | |
1da177e4 LT |
32 | #include <linux/sched.h> |
33 | #include <linux/slab.h> | |
34 | #include <linux/poll.h> | |
35 | #include <linux/fcntl.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/socket.h> | |
39 | #include <linux/skbuff.h> | |
be9d1227 | 40 | #include <linux/device.h> |
aef7d97c MH |
41 | #include <linux/debugfs.h> |
42 | #include <linux/seq_file.h> | |
1da177e4 | 43 | #include <linux/list.h> |
6230c9b4 | 44 | #include <linux/security.h> |
1da177e4 LT |
45 | #include <net/sock.h> |
46 | ||
735cbc47 | 47 | #include <linux/uaccess.h> |
1da177e4 LT |
48 | |
49 | #include <net/bluetooth/bluetooth.h> | |
50 | #include <net/bluetooth/hci_core.h> | |
51 | #include <net/bluetooth/sco.h> | |
52 | ||
eb939922 | 53 | static bool disable_esco; |
1da177e4 | 54 | |
90ddc4f0 | 55 | static const struct proto_ops sco_sock_ops; |
1da177e4 LT |
56 | |
57 | static struct bt_sock_list sco_sk_list = { | |
d5fb2962 | 58 | .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock) |
1da177e4 LT |
59 | }; |
60 | ||
61 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent); | |
62 | static void sco_chan_del(struct sock *sk, int err); | |
63 | ||
1da177e4 LT |
64 | static void sco_sock_close(struct sock *sk); |
65 | static void sco_sock_kill(struct sock *sk); | |
66 | ||
67 | /* ---- SCO timers ---- */ | |
68 | static void sco_sock_timeout(unsigned long arg) | |
69 | { | |
70 | struct sock *sk = (struct sock *) arg; | |
71 | ||
72 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
73 | ||
74 | bh_lock_sock(sk); | |
75 | sk->sk_err = ETIMEDOUT; | |
76 | sk->sk_state_change(sk); | |
77 | bh_unlock_sock(sk); | |
78 | ||
79 | sco_sock_kill(sk); | |
80 | sock_put(sk); | |
81 | } | |
82 | ||
83 | static void sco_sock_set_timer(struct sock *sk, long timeout) | |
84 | { | |
85 | BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
86 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
87 | } | |
88 | ||
89 | static void sco_sock_clear_timer(struct sock *sk) | |
90 | { | |
91 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
92 | sk_stop_timer(sk, &sk->sk_timer); | |
93 | } | |
94 | ||
1da177e4 | 95 | /* ---- SCO connections ---- */ |
519e42b3 | 96 | static struct sco_conn *sco_conn_add(struct hci_conn *hcon) |
1da177e4 LT |
97 | { |
98 | struct hci_dev *hdev = hcon->hdev; | |
25ea6db0 | 99 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 | 100 | |
519e42b3 | 101 | if (conn) |
1da177e4 LT |
102 | return conn; |
103 | ||
25ea6db0 MH |
104 | conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC); |
105 | if (!conn) | |
1da177e4 | 106 | return NULL; |
1da177e4 LT |
107 | |
108 | spin_lock_init(&conn->lock); | |
109 | ||
110 | hcon->sco_data = conn; | |
111 | conn->hcon = hcon; | |
112 | ||
113 | conn->src = &hdev->bdaddr; | |
114 | conn->dst = &hcon->dst; | |
115 | ||
116 | if (hdev->sco_mtu > 0) | |
117 | conn->mtu = hdev->sco_mtu; | |
118 | else | |
119 | conn->mtu = 60; | |
120 | ||
121 | BT_DBG("hcon %p conn %p", hcon, conn); | |
25ea6db0 | 122 | |
1da177e4 LT |
123 | return conn; |
124 | } | |
125 | ||
126 | static inline struct sock *sco_chan_get(struct sco_conn *conn) | |
127 | { | |
128 | struct sock *sk = NULL; | |
129 | sco_conn_lock(conn); | |
130 | sk = conn->sk; | |
131 | sco_conn_unlock(conn); | |
132 | return sk; | |
133 | } | |
134 | ||
135 | static int sco_conn_del(struct hci_conn *hcon, int err) | |
136 | { | |
735cbc47 | 137 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 LT |
138 | struct sock *sk; |
139 | ||
735cbc47 | 140 | if (!conn) |
1da177e4 LT |
141 | return 0; |
142 | ||
143 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
144 | ||
145 | /* Kill socket */ | |
735cbc47 AE |
146 | sk = sco_chan_get(conn); |
147 | if (sk) { | |
1da177e4 LT |
148 | bh_lock_sock(sk); |
149 | sco_sock_clear_timer(sk); | |
150 | sco_chan_del(sk, err); | |
151 | bh_unlock_sock(sk); | |
152 | sco_sock_kill(sk); | |
153 | } | |
154 | ||
155 | hcon->sco_data = NULL; | |
156 | kfree(conn); | |
157 | return 0; | |
158 | } | |
159 | ||
160 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
161 | { | |
162 | int err = 0; | |
163 | ||
164 | sco_conn_lock(conn); | |
b9dbdbc1 | 165 | if (conn->sk) |
1da177e4 | 166 | err = -EBUSY; |
b9dbdbc1 | 167 | else |
1da177e4 | 168 | __sco_chan_add(conn, sk, parent); |
b9dbdbc1 | 169 | |
1da177e4 LT |
170 | sco_conn_unlock(conn); |
171 | return err; | |
172 | } | |
173 | ||
174 | static int sco_connect(struct sock *sk) | |
175 | { | |
176 | bdaddr_t *src = &bt_sk(sk)->src; | |
177 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
178 | struct sco_conn *conn; | |
179 | struct hci_conn *hcon; | |
180 | struct hci_dev *hdev; | |
b6a0dc82 | 181 | int err, type; |
1da177e4 LT |
182 | |
183 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
184 | ||
735cbc47 AE |
185 | hdev = hci_get_route(dst, src); |
186 | if (!hdev) | |
1da177e4 LT |
187 | return -EHOSTUNREACH; |
188 | ||
09fd0de5 | 189 | hci_dev_lock(hdev); |
1da177e4 | 190 | |
7cb127d5 MH |
191 | if (lmp_esco_capable(hdev) && !disable_esco) |
192 | type = ESCO_LINK; | |
193 | else | |
194 | type = SCO_LINK; | |
b6a0dc82 | 195 | |
b12f62cf AG |
196 | hcon = hci_connect(hdev, type, dst, BDADDR_BREDR, BT_SECURITY_LOW, |
197 | HCI_AT_NO_BONDING); | |
30e76272 VT |
198 | if (IS_ERR(hcon)) { |
199 | err = PTR_ERR(hcon); | |
1da177e4 | 200 | goto done; |
30e76272 | 201 | } |
1da177e4 | 202 | |
519e42b3 | 203 | conn = sco_conn_add(hcon); |
1da177e4 LT |
204 | if (!conn) { |
205 | hci_conn_put(hcon); | |
30e76272 | 206 | err = -ENOMEM; |
1da177e4 LT |
207 | goto done; |
208 | } | |
209 | ||
210 | /* Update source addr of the socket */ | |
211 | bacpy(src, conn->src); | |
212 | ||
213 | err = sco_chan_add(conn, sk, NULL); | |
214 | if (err) | |
215 | goto done; | |
216 | ||
217 | if (hcon->state == BT_CONNECTED) { | |
218 | sco_sock_clear_timer(sk); | |
219 | sk->sk_state = BT_CONNECTED; | |
220 | } else { | |
221 | sk->sk_state = BT_CONNECT; | |
222 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
223 | } | |
b6a0dc82 | 224 | |
1da177e4 | 225 | done: |
09fd0de5 | 226 | hci_dev_unlock(hdev); |
1da177e4 LT |
227 | hci_dev_put(hdev); |
228 | return err; | |
229 | } | |
230 | ||
231 | static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) | |
232 | { | |
233 | struct sco_conn *conn = sco_pi(sk)->conn; | |
234 | struct sk_buff *skb; | |
088ce088 | 235 | int err; |
1da177e4 LT |
236 | |
237 | /* Check outgoing MTU */ | |
238 | if (len > conn->mtu) | |
239 | return -EINVAL; | |
240 | ||
241 | BT_DBG("sk %p len %d", sk, len); | |
242 | ||
088ce088 | 243 | skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err); |
b9dbdbc1 | 244 | if (!skb) |
1da177e4 LT |
245 | return err; |
246 | ||
088ce088 | 247 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { |
b9dbdbc1 GP |
248 | kfree_skb(skb); |
249 | return -EFAULT; | |
1da177e4 LT |
250 | } |
251 | ||
0d861d8b | 252 | hci_send_sco(conn->hcon, skb); |
1da177e4 | 253 | |
088ce088 | 254 | return len; |
1da177e4 LT |
255 | } |
256 | ||
257 | static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) | |
258 | { | |
259 | struct sock *sk = sco_chan_get(conn); | |
260 | ||
261 | if (!sk) | |
262 | goto drop; | |
263 | ||
264 | BT_DBG("sk %p len %d", sk, skb->len); | |
265 | ||
266 | if (sk->sk_state != BT_CONNECTED) | |
267 | goto drop; | |
268 | ||
269 | if (!sock_queue_rcv_skb(sk, skb)) | |
270 | return; | |
271 | ||
272 | drop: | |
273 | kfree_skb(skb); | |
1da177e4 LT |
274 | } |
275 | ||
276 | /* -------- Socket interface ---------- */ | |
fb334059 | 277 | static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba) |
1da177e4 | 278 | { |
1da177e4 | 279 | struct hlist_node *node; |
fb334059 MH |
280 | struct sock *sk; |
281 | ||
282 | sk_for_each(sk, node, &sco_sk_list.head) { | |
283 | if (sk->sk_state != BT_LISTEN) | |
284 | continue; | |
1da177e4 | 285 | |
1da177e4 | 286 | if (!bacmp(&bt_sk(sk)->src, ba)) |
fb334059 MH |
287 | return sk; |
288 | } | |
289 | ||
290 | return NULL; | |
1da177e4 LT |
291 | } |
292 | ||
293 | /* Find socket listening on source bdaddr. | |
294 | * Returns closest match. | |
295 | */ | |
296 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
297 | { | |
298 | struct sock *sk = NULL, *sk1 = NULL; | |
299 | struct hlist_node *node; | |
300 | ||
301 | read_lock(&sco_sk_list.lock); | |
302 | ||
303 | sk_for_each(sk, node, &sco_sk_list.head) { | |
304 | if (sk->sk_state != BT_LISTEN) | |
305 | continue; | |
306 | ||
307 | /* Exact match. */ | |
308 | if (!bacmp(&bt_sk(sk)->src, src)) | |
309 | break; | |
310 | ||
311 | /* Closest match */ | |
312 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
313 | sk1 = sk; | |
314 | } | |
315 | ||
316 | read_unlock(&sco_sk_list.lock); | |
317 | ||
318 | return node ? sk : sk1; | |
319 | } | |
320 | ||
321 | static void sco_sock_destruct(struct sock *sk) | |
322 | { | |
323 | BT_DBG("sk %p", sk); | |
324 | ||
325 | skb_queue_purge(&sk->sk_receive_queue); | |
326 | skb_queue_purge(&sk->sk_write_queue); | |
327 | } | |
328 | ||
329 | static void sco_sock_cleanup_listen(struct sock *parent) | |
330 | { | |
331 | struct sock *sk; | |
332 | ||
333 | BT_DBG("parent %p", parent); | |
334 | ||
335 | /* Close not yet accepted channels */ | |
336 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
337 | sco_sock_close(sk); | |
338 | sco_sock_kill(sk); | |
339 | } | |
340 | ||
341 | parent->sk_state = BT_CLOSED; | |
342 | sock_set_flag(parent, SOCK_ZAPPED); | |
343 | } | |
344 | ||
345 | /* Kill socket (only if zapped and orphan) | |
346 | * Must be called on unlocked socket. | |
347 | */ | |
348 | static void sco_sock_kill(struct sock *sk) | |
349 | { | |
350 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
351 | return; | |
352 | ||
353 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
354 | ||
355 | /* Kill poor orphan */ | |
356 | bt_sock_unlink(&sco_sk_list, sk); | |
357 | sock_set_flag(sk, SOCK_DEAD); | |
358 | sock_put(sk); | |
359 | } | |
360 | ||
fd0b3ff7 | 361 | static void __sco_sock_close(struct sock *sk) |
1da177e4 | 362 | { |
fd0b3ff7 | 363 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
1da177e4 LT |
364 | |
365 | switch (sk->sk_state) { | |
366 | case BT_LISTEN: | |
367 | sco_sock_cleanup_listen(sk); | |
368 | break; | |
369 | ||
370 | case BT_CONNECTED: | |
371 | case BT_CONFIG: | |
4a77708b LAD |
372 | if (sco_pi(sk)->conn) { |
373 | sk->sk_state = BT_DISCONN; | |
374 | sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); | |
375 | hci_conn_put(sco_pi(sk)->conn->hcon); | |
376 | sco_pi(sk)->conn->hcon = NULL; | |
377 | } else | |
378 | sco_chan_del(sk, ECONNRESET); | |
379 | break; | |
380 | ||
1da177e4 LT |
381 | case BT_CONNECT: |
382 | case BT_DISCONN: | |
383 | sco_chan_del(sk, ECONNRESET); | |
384 | break; | |
385 | ||
386 | default: | |
387 | sock_set_flag(sk, SOCK_ZAPPED); | |
388 | break; | |
3ff50b79 | 389 | } |
fd0b3ff7 | 390 | } |
1da177e4 | 391 | |
fd0b3ff7 MH |
392 | /* Must be called on unlocked socket. */ |
393 | static void sco_sock_close(struct sock *sk) | |
394 | { | |
395 | sco_sock_clear_timer(sk); | |
396 | lock_sock(sk); | |
397 | __sco_sock_close(sk); | |
1da177e4 | 398 | release_sock(sk); |
1da177e4 LT |
399 | sco_sock_kill(sk); |
400 | } | |
401 | ||
402 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
403 | { | |
404 | BT_DBG("sk %p", sk); | |
405 | ||
6230c9b4 | 406 | if (parent) { |
1da177e4 | 407 | sk->sk_type = parent->sk_type; |
6230c9b4 PM |
408 | security_sk_clone(parent, sk); |
409 | } | |
1da177e4 LT |
410 | } |
411 | ||
412 | static struct proto sco_proto = { | |
413 | .name = "SCO", | |
414 | .owner = THIS_MODULE, | |
415 | .obj_size = sizeof(struct sco_pinfo) | |
416 | }; | |
417 | ||
1b8d7ae4 | 418 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
419 | { |
420 | struct sock *sk; | |
421 | ||
6257ff21 | 422 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
423 | if (!sk) |
424 | return NULL; | |
425 | ||
426 | sock_init_data(sock, sk); | |
427 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
428 | ||
429 | sk->sk_destruct = sco_sock_destruct; | |
430 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
431 | ||
432 | sock_reset_flag(sk, SOCK_ZAPPED); | |
433 | ||
434 | sk->sk_protocol = proto; | |
435 | sk->sk_state = BT_OPEN; | |
436 | ||
b24b8a24 | 437 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
438 | |
439 | bt_sock_link(&sco_sk_list, sk); | |
440 | return sk; | |
441 | } | |
442 | ||
3f378b68 EP |
443 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol, |
444 | int kern) | |
1da177e4 LT |
445 | { |
446 | struct sock *sk; | |
447 | ||
448 | BT_DBG("sock %p", sock); | |
449 | ||
450 | sock->state = SS_UNCONNECTED; | |
451 | ||
452 | if (sock->type != SOCK_SEQPACKET) | |
453 | return -ESOCKTNOSUPPORT; | |
454 | ||
455 | sock->ops = &sco_sock_ops; | |
456 | ||
1b8d7ae4 | 457 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 458 | if (!sk) |
1da177e4 LT |
459 | return -ENOMEM; |
460 | ||
461 | sco_sock_init(sk, NULL); | |
462 | return 0; | |
463 | } | |
464 | ||
465 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
466 | { | |
467 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
468 | struct sock *sk = sock->sk; | |
1da177e4 LT |
469 | int err = 0; |
470 | ||
471 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
472 | ||
473 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
474 | return -EINVAL; | |
475 | ||
476 | lock_sock(sk); | |
477 | ||
478 | if (sk->sk_state != BT_OPEN) { | |
479 | err = -EBADFD; | |
480 | goto done; | |
481 | } | |
482 | ||
8ed21f7e MH |
483 | if (sk->sk_type != SOCK_SEQPACKET) { |
484 | err = -EINVAL; | |
485 | goto done; | |
1da177e4 LT |
486 | } |
487 | ||
8ed21f7e MH |
488 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); |
489 | ||
490 | sk->sk_state = BT_BOUND; | |
1da177e4 LT |
491 | |
492 | done: | |
493 | release_sock(sk); | |
494 | return err; | |
495 | } | |
496 | ||
497 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
498 | { | |
499 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
500 | struct sock *sk = sock->sk; | |
501 | int err = 0; | |
502 | ||
503 | ||
504 | BT_DBG("sk %p", sk); | |
505 | ||
6503d961 CG |
506 | if (alen < sizeof(struct sockaddr_sco) || |
507 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
508 | return -EINVAL; |
509 | ||
510 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
511 | return -EBADFD; | |
512 | ||
513 | if (sk->sk_type != SOCK_SEQPACKET) | |
514 | return -EINVAL; | |
515 | ||
516 | lock_sock(sk); | |
517 | ||
518 | /* Set destination address and psm */ | |
519 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
520 | ||
735cbc47 AE |
521 | err = sco_connect(sk); |
522 | if (err) | |
1da177e4 LT |
523 | goto done; |
524 | ||
8e87d142 | 525 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
1da177e4 LT |
526 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
527 | ||
528 | done: | |
529 | release_sock(sk); | |
530 | return err; | |
531 | } | |
532 | ||
533 | static int sco_sock_listen(struct socket *sock, int backlog) | |
534 | { | |
535 | struct sock *sk = sock->sk; | |
fb334059 | 536 | bdaddr_t *src = &bt_sk(sk)->src; |
1da177e4 LT |
537 | int err = 0; |
538 | ||
539 | BT_DBG("sk %p backlog %d", sk, backlog); | |
540 | ||
541 | lock_sock(sk); | |
542 | ||
7d5d775a | 543 | if (sk->sk_state != BT_BOUND) { |
1da177e4 LT |
544 | err = -EBADFD; |
545 | goto done; | |
546 | } | |
547 | ||
7d5d775a MH |
548 | if (sk->sk_type != SOCK_SEQPACKET) { |
549 | err = -EINVAL; | |
550 | goto done; | |
551 | } | |
552 | ||
fb334059 MH |
553 | write_lock(&sco_sk_list.lock); |
554 | ||
555 | if (__sco_get_sock_listen_by_addr(src)) { | |
556 | err = -EADDRINUSE; | |
557 | goto unlock; | |
558 | } | |
559 | ||
1da177e4 LT |
560 | sk->sk_max_ack_backlog = backlog; |
561 | sk->sk_ack_backlog = 0; | |
fb334059 | 562 | |
1da177e4 LT |
563 | sk->sk_state = BT_LISTEN; |
564 | ||
fb334059 MH |
565 | unlock: |
566 | write_unlock(&sco_sk_list.lock); | |
567 | ||
1da177e4 LT |
568 | done: |
569 | release_sock(sk); | |
570 | return err; | |
571 | } | |
572 | ||
573 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
574 | { | |
575 | DECLARE_WAITQUEUE(wait, current); | |
576 | struct sock *sk = sock->sk, *ch; | |
577 | long timeo; | |
578 | int err = 0; | |
579 | ||
580 | lock_sock(sk); | |
581 | ||
1da177e4 LT |
582 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
583 | ||
584 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
585 | ||
586 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 587 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
552b0d3c | 588 | while (1) { |
1da177e4 | 589 | set_current_state(TASK_INTERRUPTIBLE); |
552b0d3c PH |
590 | |
591 | if (sk->sk_state != BT_LISTEN) { | |
592 | err = -EBADFD; | |
1da177e4 LT |
593 | break; |
594 | } | |
595 | ||
552b0d3c PH |
596 | ch = bt_accept_dequeue(sk, newsock); |
597 | if (ch) | |
598 | break; | |
1da177e4 | 599 | |
552b0d3c PH |
600 | if (!timeo) { |
601 | err = -EAGAIN; | |
1da177e4 LT |
602 | break; |
603 | } | |
604 | ||
605 | if (signal_pending(current)) { | |
606 | err = sock_intr_errno(timeo); | |
607 | break; | |
608 | } | |
552b0d3c PH |
609 | |
610 | release_sock(sk); | |
611 | timeo = schedule_timeout(timeo); | |
612 | lock_sock(sk); | |
1da177e4 | 613 | } |
552b0d3c | 614 | __set_current_state(TASK_RUNNING); |
aa395145 | 615 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
616 | |
617 | if (err) | |
618 | goto done; | |
619 | ||
620 | newsock->state = SS_CONNECTED; | |
621 | ||
622 | BT_DBG("new socket %p", ch); | |
623 | ||
624 | done: | |
625 | release_sock(sk); | |
626 | return err; | |
627 | } | |
628 | ||
629 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
630 | { | |
631 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
632 | struct sock *sk = sock->sk; | |
633 | ||
634 | BT_DBG("sock %p, sk %p", sock, sk); | |
635 | ||
636 | addr->sa_family = AF_BLUETOOTH; | |
637 | *len = sizeof(struct sockaddr_sco); | |
638 | ||
639 | if (peer) | |
640 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
641 | else | |
642 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
8e87d142 | 647 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
648 | struct msghdr *msg, size_t len) |
649 | { | |
650 | struct sock *sk = sock->sk; | |
b9dbdbc1 | 651 | int err; |
1da177e4 LT |
652 | |
653 | BT_DBG("sock %p, sk %p", sock, sk); | |
654 | ||
c1cbe4b7 BL |
655 | err = sock_error(sk); |
656 | if (err) | |
657 | return err; | |
1da177e4 LT |
658 | |
659 | if (msg->msg_flags & MSG_OOB) | |
660 | return -EOPNOTSUPP; | |
661 | ||
662 | lock_sock(sk); | |
663 | ||
664 | if (sk->sk_state == BT_CONNECTED) | |
665 | err = sco_send_frame(sk, msg, len); | |
666 | else | |
667 | err = -ENOTCONN; | |
668 | ||
669 | release_sock(sk); | |
670 | return err; | |
671 | } | |
672 | ||
b7058842 | 673 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
674 | { |
675 | struct sock *sk = sock->sk; | |
676 | int err = 0; | |
677 | ||
678 | BT_DBG("sk %p", sk); | |
679 | ||
680 | lock_sock(sk); | |
681 | ||
682 | switch (optname) { | |
683 | default: | |
684 | err = -ENOPROTOOPT; | |
685 | break; | |
686 | } | |
687 | ||
688 | release_sock(sk); | |
689 | return err; | |
690 | } | |
691 | ||
d58daf42 | 692 | static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
693 | { |
694 | struct sock *sk = sock->sk; | |
695 | struct sco_options opts; | |
696 | struct sco_conninfo cinfo; | |
8e87d142 | 697 | int len, err = 0; |
1da177e4 LT |
698 | |
699 | BT_DBG("sk %p", sk); | |
700 | ||
701 | if (get_user(len, optlen)) | |
702 | return -EFAULT; | |
703 | ||
704 | lock_sock(sk); | |
705 | ||
706 | switch (optname) { | |
707 | case SCO_OPTIONS: | |
708 | if (sk->sk_state != BT_CONNECTED) { | |
709 | err = -ENOTCONN; | |
710 | break; | |
711 | } | |
712 | ||
713 | opts.mtu = sco_pi(sk)->conn->mtu; | |
714 | ||
715 | BT_DBG("mtu %d", opts.mtu); | |
716 | ||
717 | len = min_t(unsigned int, len, sizeof(opts)); | |
718 | if (copy_to_user(optval, (char *)&opts, len)) | |
719 | err = -EFAULT; | |
720 | ||
721 | break; | |
722 | ||
723 | case SCO_CONNINFO: | |
724 | if (sk->sk_state != BT_CONNECTED) { | |
725 | err = -ENOTCONN; | |
726 | break; | |
727 | } | |
728 | ||
c4c896e1 | 729 | memset(&cinfo, 0, sizeof(cinfo)); |
1da177e4 LT |
730 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; |
731 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
732 | ||
733 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
734 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
735 | err = -EFAULT; | |
736 | ||
737 | break; | |
738 | ||
739 | default: | |
740 | err = -ENOPROTOOPT; | |
741 | break; | |
742 | } | |
743 | ||
744 | release_sock(sk); | |
745 | return err; | |
746 | } | |
747 | ||
d58daf42 MH |
748 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
749 | { | |
750 | struct sock *sk = sock->sk; | |
751 | int len, err = 0; | |
752 | ||
753 | BT_DBG("sk %p", sk); | |
754 | ||
755 | if (level == SOL_SCO) | |
756 | return sco_sock_getsockopt_old(sock, optname, optval, optlen); | |
757 | ||
758 | if (get_user(len, optlen)) | |
759 | return -EFAULT; | |
760 | ||
761 | lock_sock(sk); | |
762 | ||
763 | switch (optname) { | |
764 | default: | |
765 | err = -ENOPROTOOPT; | |
766 | break; | |
767 | } | |
768 | ||
769 | release_sock(sk); | |
770 | return err; | |
771 | } | |
772 | ||
fd0b3ff7 MH |
773 | static int sco_sock_shutdown(struct socket *sock, int how) |
774 | { | |
775 | struct sock *sk = sock->sk; | |
776 | int err = 0; | |
777 | ||
778 | BT_DBG("sock %p, sk %p", sock, sk); | |
779 | ||
780 | if (!sk) | |
781 | return 0; | |
782 | ||
783 | lock_sock(sk); | |
784 | if (!sk->sk_shutdown) { | |
785 | sk->sk_shutdown = SHUTDOWN_MASK; | |
786 | sco_sock_clear_timer(sk); | |
787 | __sco_sock_close(sk); | |
788 | ||
789 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
790 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
791 | sk->sk_lingertime); | |
792 | } | |
793 | release_sock(sk); | |
794 | return err; | |
795 | } | |
796 | ||
1da177e4 LT |
797 | static int sco_sock_release(struct socket *sock) |
798 | { | |
799 | struct sock *sk = sock->sk; | |
800 | int err = 0; | |
801 | ||
802 | BT_DBG("sock %p, sk %p", sock, sk); | |
803 | ||
804 | if (!sk) | |
805 | return 0; | |
806 | ||
807 | sco_sock_close(sk); | |
808 | ||
809 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
810 | lock_sock(sk); | |
811 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
812 | release_sock(sk); | |
813 | } | |
814 | ||
815 | sock_orphan(sk); | |
816 | sco_sock_kill(sk); | |
817 | return err; | |
818 | } | |
819 | ||
820 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
821 | { | |
822 | BT_DBG("conn %p", conn); | |
823 | ||
824 | sco_pi(sk)->conn = conn; | |
825 | conn->sk = sk; | |
826 | ||
827 | if (parent) | |
828 | bt_accept_enqueue(parent, sk); | |
829 | } | |
830 | ||
8e87d142 | 831 | /* Delete channel. |
1da177e4 LT |
832 | * Must be called on the locked socket. */ |
833 | static void sco_chan_del(struct sock *sk, int err) | |
834 | { | |
835 | struct sco_conn *conn; | |
836 | ||
837 | conn = sco_pi(sk)->conn; | |
838 | ||
839 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
840 | ||
8e87d142 | 841 | if (conn) { |
1da177e4 LT |
842 | sco_conn_lock(conn); |
843 | conn->sk = NULL; | |
844 | sco_pi(sk)->conn = NULL; | |
845 | sco_conn_unlock(conn); | |
4a77708b LAD |
846 | |
847 | if (conn->hcon) | |
848 | hci_conn_put(conn->hcon); | |
1da177e4 LT |
849 | } |
850 | ||
851 | sk->sk_state = BT_CLOSED; | |
852 | sk->sk_err = err; | |
853 | sk->sk_state_change(sk); | |
854 | ||
855 | sock_set_flag(sk, SOCK_ZAPPED); | |
856 | } | |
857 | ||
858 | static void sco_conn_ready(struct sco_conn *conn) | |
859 | { | |
735cbc47 AE |
860 | struct sock *parent; |
861 | struct sock *sk = conn->sk; | |
1da177e4 LT |
862 | |
863 | BT_DBG("conn %p", conn); | |
864 | ||
865 | sco_conn_lock(conn); | |
866 | ||
735cbc47 | 867 | if (sk) { |
1da177e4 LT |
868 | sco_sock_clear_timer(sk); |
869 | bh_lock_sock(sk); | |
870 | sk->sk_state = BT_CONNECTED; | |
871 | sk->sk_state_change(sk); | |
872 | bh_unlock_sock(sk); | |
873 | } else { | |
874 | parent = sco_get_sock_listen(conn->src); | |
875 | if (!parent) | |
876 | goto done; | |
877 | ||
878 | bh_lock_sock(parent); | |
879 | ||
b9dbdbc1 GP |
880 | sk = sco_sock_alloc(sock_net(parent), NULL, |
881 | BTPROTO_SCO, GFP_ATOMIC); | |
1da177e4 LT |
882 | if (!sk) { |
883 | bh_unlock_sock(parent); | |
884 | goto done; | |
885 | } | |
886 | ||
887 | sco_sock_init(sk, parent); | |
888 | ||
889 | bacpy(&bt_sk(sk)->src, conn->src); | |
890 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
891 | ||
892 | hci_conn_hold(conn->hcon); | |
893 | __sco_chan_add(conn, sk, parent); | |
894 | ||
895 | sk->sk_state = BT_CONNECTED; | |
896 | ||
897 | /* Wake up parent */ | |
898 | parent->sk_data_ready(parent, 1); | |
899 | ||
900 | bh_unlock_sock(parent); | |
901 | } | |
902 | ||
903 | done: | |
904 | sco_conn_unlock(conn); | |
905 | } | |
906 | ||
907 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
686ebf28 | 908 | int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1da177e4 | 909 | { |
71aeeaa1 MH |
910 | register struct sock *sk; |
911 | struct hlist_node *node; | |
912 | int lm = 0; | |
913 | ||
1da177e4 LT |
914 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
915 | ||
71aeeaa1 MH |
916 | /* Find listening sockets */ |
917 | read_lock(&sco_sk_list.lock); | |
918 | sk_for_each(sk, node, &sco_sk_list.head) { | |
919 | if (sk->sk_state != BT_LISTEN) | |
920 | continue; | |
921 | ||
922 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || | |
923 | !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { | |
924 | lm |= HCI_LM_ACCEPT; | |
925 | break; | |
926 | } | |
927 | } | |
928 | read_unlock(&sco_sk_list.lock); | |
929 | ||
930 | return lm; | |
1da177e4 LT |
931 | } |
932 | ||
686ebf28 | 933 | int sco_connect_cfm(struct hci_conn *hcon, __u8 status) |
1da177e4 LT |
934 | { |
935 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
1da177e4 LT |
936 | if (!status) { |
937 | struct sco_conn *conn; | |
938 | ||
519e42b3 | 939 | conn = sco_conn_add(hcon); |
1da177e4 LT |
940 | if (conn) |
941 | sco_conn_ready(conn); | |
8e87d142 | 942 | } else |
e175072f | 943 | sco_conn_del(hcon, bt_to_errno(status)); |
1da177e4 LT |
944 | |
945 | return 0; | |
946 | } | |
947 | ||
686ebf28 | 948 | int sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
1da177e4 LT |
949 | { |
950 | BT_DBG("hcon %p reason %d", hcon, reason); | |
951 | ||
e175072f | 952 | sco_conn_del(hcon, bt_to_errno(reason)); |
1da177e4 LT |
953 | return 0; |
954 | } | |
955 | ||
686ebf28 | 956 | int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) |
1da177e4 LT |
957 | { |
958 | struct sco_conn *conn = hcon->sco_data; | |
959 | ||
960 | if (!conn) | |
961 | goto drop; | |
962 | ||
963 | BT_DBG("conn %p len %d", conn, skb->len); | |
964 | ||
965 | if (skb->len) { | |
966 | sco_recv_frame(conn, skb); | |
967 | return 0; | |
968 | } | |
969 | ||
970 | drop: | |
8e87d142 | 971 | kfree_skb(skb); |
1da177e4 LT |
972 | return 0; |
973 | } | |
974 | ||
aef7d97c | 975 | static int sco_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
976 | { |
977 | struct sock *sk; | |
978 | struct hlist_node *node; | |
1da177e4 | 979 | |
ee65d19e | 980 | read_lock(&sco_sk_list.lock); |
1da177e4 | 981 | |
be9d1227 | 982 | sk_for_each(sk, node, &sco_sk_list.head) { |
aef7d97c MH |
983 | seq_printf(f, "%s %s %d\n", batostr(&bt_sk(sk)->src), |
984 | batostr(&bt_sk(sk)->dst), sk->sk_state); | |
be9d1227 | 985 | } |
1da177e4 | 986 | |
ee65d19e | 987 | read_unlock(&sco_sk_list.lock); |
1da177e4 | 988 | |
aef7d97c | 989 | return 0; |
1da177e4 LT |
990 | } |
991 | ||
aef7d97c MH |
992 | static int sco_debugfs_open(struct inode *inode, struct file *file) |
993 | { | |
994 | return single_open(file, sco_debugfs_show, inode->i_private); | |
995 | } | |
996 | ||
997 | static const struct file_operations sco_debugfs_fops = { | |
998 | .open = sco_debugfs_open, | |
999 | .read = seq_read, | |
1000 | .llseek = seq_lseek, | |
1001 | .release = single_release, | |
1002 | }; | |
1003 | ||
1004 | static struct dentry *sco_debugfs; | |
1da177e4 | 1005 | |
90ddc4f0 | 1006 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
1007 | .family = PF_BLUETOOTH, |
1008 | .owner = THIS_MODULE, | |
1009 | .release = sco_sock_release, | |
1010 | .bind = sco_sock_bind, | |
1011 | .connect = sco_sock_connect, | |
1012 | .listen = sco_sock_listen, | |
1013 | .accept = sco_sock_accept, | |
1014 | .getname = sco_sock_getname, | |
1015 | .sendmsg = sco_sock_sendmsg, | |
1016 | .recvmsg = bt_sock_recvmsg, | |
1017 | .poll = bt_sock_poll, | |
3241ad82 | 1018 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
1019 | .mmap = sock_no_mmap, |
1020 | .socketpair = sock_no_socketpair, | |
fd0b3ff7 | 1021 | .shutdown = sco_sock_shutdown, |
1da177e4 LT |
1022 | .setsockopt = sco_sock_setsockopt, |
1023 | .getsockopt = sco_sock_getsockopt | |
1024 | }; | |
1025 | ||
ec1b4cf7 | 1026 | static const struct net_proto_family sco_sock_family_ops = { |
1da177e4 LT |
1027 | .family = PF_BLUETOOTH, |
1028 | .owner = THIS_MODULE, | |
1029 | .create = sco_sock_create, | |
1030 | }; | |
1031 | ||
64274518 | 1032 | int __init sco_init(void) |
1da177e4 LT |
1033 | { |
1034 | int err; | |
1035 | ||
1036 | err = proto_register(&sco_proto, 0); | |
1037 | if (err < 0) | |
1038 | return err; | |
1039 | ||
1040 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1041 | if (err < 0) { | |
1042 | BT_ERR("SCO socket registration failed"); | |
1043 | goto error; | |
1044 | } | |
1045 | ||
aef7d97c MH |
1046 | if (bt_debugfs) { |
1047 | sco_debugfs = debugfs_create_file("sco", 0444, | |
1048 | bt_debugfs, NULL, &sco_debugfs_fops); | |
1049 | if (!sco_debugfs) | |
1050 | BT_ERR("Failed to create SCO debug file"); | |
1051 | } | |
1da177e4 | 1052 | |
1da177e4 LT |
1053 | BT_INFO("SCO socket layer initialized"); |
1054 | ||
1055 | return 0; | |
1056 | ||
1057 | error: | |
1058 | proto_unregister(&sco_proto); | |
1059 | return err; | |
1060 | } | |
1061 | ||
64274518 | 1062 | void __exit sco_exit(void) |
1da177e4 | 1063 | { |
aef7d97c | 1064 | debugfs_remove(sco_debugfs); |
1da177e4 LT |
1065 | |
1066 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1067 | BT_ERR("SCO socket unregistration failed"); | |
1068 | ||
1da177e4 LT |
1069 | proto_unregister(&sco_proto); |
1070 | } | |
1071 | ||
7cb127d5 MH |
1072 | module_param(disable_esco, bool, 0644); |
1073 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); |