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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 | ||
47 | #include <asm/system.h> | |
735cbc47 | 48 | #include <linux/uaccess.h> |
1da177e4 LT |
49 | |
50 | #include <net/bluetooth/bluetooth.h> | |
51 | #include <net/bluetooth/hci_core.h> | |
52 | #include <net/bluetooth/sco.h> | |
53 | ||
735cbc47 | 54 | static int disable_esco; |
1da177e4 | 55 | |
90ddc4f0 | 56 | static const struct proto_ops sco_sock_ops; |
1da177e4 LT |
57 | |
58 | static struct bt_sock_list sco_sk_list = { | |
d5fb2962 | 59 | .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock) |
1da177e4 LT |
60 | }; |
61 | ||
62 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent); | |
63 | static void sco_chan_del(struct sock *sk, int err); | |
64 | ||
65 | static int sco_conn_del(struct hci_conn *conn, int err); | |
66 | ||
67 | static void sco_sock_close(struct sock *sk); | |
68 | static void sco_sock_kill(struct sock *sk); | |
69 | ||
70 | /* ---- SCO timers ---- */ | |
71 | static void sco_sock_timeout(unsigned long arg) | |
72 | { | |
73 | struct sock *sk = (struct sock *) arg; | |
74 | ||
75 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
76 | ||
77 | bh_lock_sock(sk); | |
78 | sk->sk_err = ETIMEDOUT; | |
79 | sk->sk_state_change(sk); | |
80 | bh_unlock_sock(sk); | |
81 | ||
82 | sco_sock_kill(sk); | |
83 | sock_put(sk); | |
84 | } | |
85 | ||
86 | static void sco_sock_set_timer(struct sock *sk, long timeout) | |
87 | { | |
88 | BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
89 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
90 | } | |
91 | ||
92 | static void sco_sock_clear_timer(struct sock *sk) | |
93 | { | |
94 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
95 | sk_stop_timer(sk, &sk->sk_timer); | |
96 | } | |
97 | ||
1da177e4 LT |
98 | /* ---- SCO connections ---- */ |
99 | static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status) | |
100 | { | |
101 | struct hci_dev *hdev = hcon->hdev; | |
25ea6db0 | 102 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 | 103 | |
25ea6db0 | 104 | if (conn || status) |
1da177e4 LT |
105 | return conn; |
106 | ||
25ea6db0 MH |
107 | conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC); |
108 | if (!conn) | |
1da177e4 | 109 | return NULL; |
1da177e4 LT |
110 | |
111 | spin_lock_init(&conn->lock); | |
112 | ||
113 | hcon->sco_data = conn; | |
114 | conn->hcon = hcon; | |
115 | ||
116 | conn->src = &hdev->bdaddr; | |
117 | conn->dst = &hcon->dst; | |
118 | ||
119 | if (hdev->sco_mtu > 0) | |
120 | conn->mtu = hdev->sco_mtu; | |
121 | else | |
122 | conn->mtu = 60; | |
123 | ||
124 | BT_DBG("hcon %p conn %p", hcon, conn); | |
25ea6db0 | 125 | |
1da177e4 LT |
126 | return conn; |
127 | } | |
128 | ||
129 | static inline struct sock *sco_chan_get(struct sco_conn *conn) | |
130 | { | |
131 | struct sock *sk = NULL; | |
132 | sco_conn_lock(conn); | |
133 | sk = conn->sk; | |
134 | sco_conn_unlock(conn); | |
135 | return sk; | |
136 | } | |
137 | ||
138 | static int sco_conn_del(struct hci_conn *hcon, int err) | |
139 | { | |
735cbc47 | 140 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 LT |
141 | struct sock *sk; |
142 | ||
735cbc47 | 143 | if (!conn) |
1da177e4 LT |
144 | return 0; |
145 | ||
146 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
147 | ||
148 | /* Kill socket */ | |
735cbc47 AE |
149 | sk = sco_chan_get(conn); |
150 | if (sk) { | |
1da177e4 LT |
151 | bh_lock_sock(sk); |
152 | sco_sock_clear_timer(sk); | |
153 | sco_chan_del(sk, err); | |
154 | bh_unlock_sock(sk); | |
155 | sco_sock_kill(sk); | |
156 | } | |
157 | ||
158 | hcon->sco_data = NULL; | |
159 | kfree(conn); | |
160 | return 0; | |
161 | } | |
162 | ||
163 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
164 | { | |
165 | int err = 0; | |
166 | ||
167 | sco_conn_lock(conn); | |
b9dbdbc1 | 168 | if (conn->sk) |
1da177e4 | 169 | err = -EBUSY; |
b9dbdbc1 | 170 | else |
1da177e4 | 171 | __sco_chan_add(conn, sk, parent); |
b9dbdbc1 | 172 | |
1da177e4 LT |
173 | sco_conn_unlock(conn); |
174 | return err; | |
175 | } | |
176 | ||
177 | static int sco_connect(struct sock *sk) | |
178 | { | |
179 | bdaddr_t *src = &bt_sk(sk)->src; | |
180 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
181 | struct sco_conn *conn; | |
182 | struct hci_conn *hcon; | |
183 | struct hci_dev *hdev; | |
b6a0dc82 | 184 | int err, type; |
1da177e4 LT |
185 | |
186 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
187 | ||
735cbc47 AE |
188 | hdev = hci_get_route(dst, src); |
189 | if (!hdev) | |
1da177e4 LT |
190 | return -EHOSTUNREACH; |
191 | ||
192 | hci_dev_lock_bh(hdev); | |
193 | ||
7cb127d5 MH |
194 | if (lmp_esco_capable(hdev) && !disable_esco) |
195 | type = ESCO_LINK; | |
196 | else | |
197 | type = SCO_LINK; | |
b6a0dc82 | 198 | |
8c1b2355 | 199 | hcon = hci_connect(hdev, type, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
30e76272 VT |
200 | if (IS_ERR(hcon)) { |
201 | err = PTR_ERR(hcon); | |
1da177e4 | 202 | goto done; |
30e76272 | 203 | } |
1da177e4 LT |
204 | |
205 | conn = sco_conn_add(hcon, 0); | |
206 | if (!conn) { | |
207 | hci_conn_put(hcon); | |
30e76272 | 208 | err = -ENOMEM; |
1da177e4 LT |
209 | goto done; |
210 | } | |
211 | ||
212 | /* Update source addr of the socket */ | |
213 | bacpy(src, conn->src); | |
214 | ||
215 | err = sco_chan_add(conn, sk, NULL); | |
216 | if (err) | |
217 | goto done; | |
218 | ||
219 | if (hcon->state == BT_CONNECTED) { | |
220 | sco_sock_clear_timer(sk); | |
221 | sk->sk_state = BT_CONNECTED; | |
222 | } else { | |
223 | sk->sk_state = BT_CONNECT; | |
224 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
225 | } | |
b6a0dc82 | 226 | |
1da177e4 LT |
227 | done: |
228 | hci_dev_unlock_bh(hdev); | |
229 | hci_dev_put(hdev); | |
230 | return err; | |
231 | } | |
232 | ||
233 | static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) | |
234 | { | |
235 | struct sco_conn *conn = sco_pi(sk)->conn; | |
236 | struct sk_buff *skb; | |
237 | int err, count; | |
238 | ||
239 | /* Check outgoing MTU */ | |
240 | if (len > conn->mtu) | |
241 | return -EINVAL; | |
242 | ||
243 | BT_DBG("sk %p len %d", sk, len); | |
244 | ||
245 | count = min_t(unsigned int, conn->mtu, len); | |
b9dbdbc1 GP |
246 | skb = bt_skb_send_alloc(sk, count, |
247 | msg->msg_flags & MSG_DONTWAIT, &err); | |
248 | if (!skb) | |
1da177e4 LT |
249 | return err; |
250 | ||
251 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
b9dbdbc1 GP |
252 | kfree_skb(skb); |
253 | return -EFAULT; | |
1da177e4 LT |
254 | } |
255 | ||
0d861d8b | 256 | hci_send_sco(conn->hcon, skb); |
1da177e4 LT |
257 | |
258 | return count; | |
1da177e4 LT |
259 | } |
260 | ||
261 | static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) | |
262 | { | |
263 | struct sock *sk = sco_chan_get(conn); | |
264 | ||
265 | if (!sk) | |
266 | goto drop; | |
267 | ||
268 | BT_DBG("sk %p len %d", sk, skb->len); | |
269 | ||
270 | if (sk->sk_state != BT_CONNECTED) | |
271 | goto drop; | |
272 | ||
273 | if (!sock_queue_rcv_skb(sk, skb)) | |
274 | return; | |
275 | ||
276 | drop: | |
277 | kfree_skb(skb); | |
1da177e4 LT |
278 | } |
279 | ||
280 | /* -------- Socket interface ---------- */ | |
281 | static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba) | |
282 | { | |
283 | struct sock *sk; | |
284 | struct hlist_node *node; | |
285 | ||
286 | sk_for_each(sk, node, &sco_sk_list.head) | |
287 | if (!bacmp(&bt_sk(sk)->src, ba)) | |
288 | goto found; | |
289 | sk = NULL; | |
290 | found: | |
291 | return sk; | |
292 | } | |
293 | ||
294 | /* Find socket listening on source bdaddr. | |
295 | * Returns closest match. | |
296 | */ | |
297 | static struct sock *sco_get_sock_listen(bdaddr_t *src) | |
298 | { | |
299 | struct sock *sk = NULL, *sk1 = NULL; | |
300 | struct hlist_node *node; | |
301 | ||
302 | read_lock(&sco_sk_list.lock); | |
303 | ||
304 | sk_for_each(sk, node, &sco_sk_list.head) { | |
305 | if (sk->sk_state != BT_LISTEN) | |
306 | continue; | |
307 | ||
308 | /* Exact match. */ | |
309 | if (!bacmp(&bt_sk(sk)->src, src)) | |
310 | break; | |
311 | ||
312 | /* Closest match */ | |
313 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
314 | sk1 = sk; | |
315 | } | |
316 | ||
317 | read_unlock(&sco_sk_list.lock); | |
318 | ||
319 | return node ? sk : sk1; | |
320 | } | |
321 | ||
322 | static void sco_sock_destruct(struct sock *sk) | |
323 | { | |
324 | BT_DBG("sk %p", sk); | |
325 | ||
326 | skb_queue_purge(&sk->sk_receive_queue); | |
327 | skb_queue_purge(&sk->sk_write_queue); | |
328 | } | |
329 | ||
330 | static void sco_sock_cleanup_listen(struct sock *parent) | |
331 | { | |
332 | struct sock *sk; | |
333 | ||
334 | BT_DBG("parent %p", parent); | |
335 | ||
336 | /* Close not yet accepted channels */ | |
337 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
338 | sco_sock_close(sk); | |
339 | sco_sock_kill(sk); | |
340 | } | |
341 | ||
342 | parent->sk_state = BT_CLOSED; | |
343 | sock_set_flag(parent, SOCK_ZAPPED); | |
344 | } | |
345 | ||
346 | /* Kill socket (only if zapped and orphan) | |
347 | * Must be called on unlocked socket. | |
348 | */ | |
349 | static void sco_sock_kill(struct sock *sk) | |
350 | { | |
351 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
352 | return; | |
353 | ||
354 | BT_DBG("sk %p state %d", sk, sk->sk_state); | |
355 | ||
356 | /* Kill poor orphan */ | |
357 | bt_sock_unlink(&sco_sk_list, sk); | |
358 | sock_set_flag(sk, SOCK_DEAD); | |
359 | sock_put(sk); | |
360 | } | |
361 | ||
fd0b3ff7 | 362 | static void __sco_sock_close(struct sock *sk) |
1da177e4 | 363 | { |
fd0b3ff7 | 364 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
1da177e4 LT |
365 | |
366 | switch (sk->sk_state) { | |
367 | case BT_LISTEN: | |
368 | sco_sock_cleanup_listen(sk); | |
369 | break; | |
370 | ||
371 | case BT_CONNECTED: | |
372 | case BT_CONFIG: | |
4a77708b LAD |
373 | if (sco_pi(sk)->conn) { |
374 | sk->sk_state = BT_DISCONN; | |
375 | sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); | |
376 | hci_conn_put(sco_pi(sk)->conn->hcon); | |
377 | sco_pi(sk)->conn->hcon = NULL; | |
378 | } else | |
379 | sco_chan_del(sk, ECONNRESET); | |
380 | break; | |
381 | ||
1da177e4 LT |
382 | case BT_CONNECT: |
383 | case BT_DISCONN: | |
384 | sco_chan_del(sk, ECONNRESET); | |
385 | break; | |
386 | ||
387 | default: | |
388 | sock_set_flag(sk, SOCK_ZAPPED); | |
389 | break; | |
3ff50b79 | 390 | } |
fd0b3ff7 | 391 | } |
1da177e4 | 392 | |
fd0b3ff7 MH |
393 | /* Must be called on unlocked socket. */ |
394 | static void sco_sock_close(struct sock *sk) | |
395 | { | |
396 | sco_sock_clear_timer(sk); | |
397 | lock_sock(sk); | |
398 | __sco_sock_close(sk); | |
1da177e4 | 399 | release_sock(sk); |
1da177e4 LT |
400 | sco_sock_kill(sk); |
401 | } | |
402 | ||
403 | static void sco_sock_init(struct sock *sk, struct sock *parent) | |
404 | { | |
405 | BT_DBG("sk %p", sk); | |
406 | ||
6230c9b4 | 407 | if (parent) { |
1da177e4 | 408 | sk->sk_type = parent->sk_type; |
6230c9b4 PM |
409 | security_sk_clone(parent, sk); |
410 | } | |
1da177e4 LT |
411 | } |
412 | ||
413 | static struct proto sco_proto = { | |
414 | .name = "SCO", | |
415 | .owner = THIS_MODULE, | |
416 | .obj_size = sizeof(struct sco_pinfo) | |
417 | }; | |
418 | ||
1b8d7ae4 | 419 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
420 | { |
421 | struct sock *sk; | |
422 | ||
6257ff21 | 423 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
424 | if (!sk) |
425 | return NULL; | |
426 | ||
427 | sock_init_data(sock, sk); | |
428 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
429 | ||
430 | sk->sk_destruct = sco_sock_destruct; | |
431 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
432 | ||
433 | sock_reset_flag(sk, SOCK_ZAPPED); | |
434 | ||
435 | sk->sk_protocol = proto; | |
436 | sk->sk_state = BT_OPEN; | |
437 | ||
b24b8a24 | 438 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
439 | |
440 | bt_sock_link(&sco_sk_list, sk); | |
441 | return sk; | |
442 | } | |
443 | ||
3f378b68 EP |
444 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol, |
445 | int kern) | |
1da177e4 LT |
446 | { |
447 | struct sock *sk; | |
448 | ||
449 | BT_DBG("sock %p", sock); | |
450 | ||
451 | sock->state = SS_UNCONNECTED; | |
452 | ||
453 | if (sock->type != SOCK_SEQPACKET) | |
454 | return -ESOCKTNOSUPPORT; | |
455 | ||
456 | sock->ops = &sco_sock_ops; | |
457 | ||
1b8d7ae4 | 458 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 459 | if (!sk) |
1da177e4 LT |
460 | return -ENOMEM; |
461 | ||
462 | sco_sock_init(sk, NULL); | |
463 | return 0; | |
464 | } | |
465 | ||
466 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
467 | { | |
468 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
469 | struct sock *sk = sock->sk; | |
470 | bdaddr_t *src = &sa->sco_bdaddr; | |
471 | int err = 0; | |
472 | ||
473 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
474 | ||
475 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
476 | return -EINVAL; | |
477 | ||
478 | lock_sock(sk); | |
479 | ||
480 | if (sk->sk_state != BT_OPEN) { | |
481 | err = -EBADFD; | |
482 | goto done; | |
483 | } | |
484 | ||
485 | write_lock_bh(&sco_sk_list.lock); | |
486 | ||
487 | if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) { | |
488 | err = -EADDRINUSE; | |
489 | } else { | |
490 | /* Save source address */ | |
491 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); | |
492 | sk->sk_state = BT_BOUND; | |
493 | } | |
494 | ||
495 | write_unlock_bh(&sco_sk_list.lock); | |
496 | ||
497 | done: | |
498 | release_sock(sk); | |
499 | return err; | |
500 | } | |
501 | ||
502 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
503 | { | |
504 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
505 | struct sock *sk = sock->sk; | |
506 | int err = 0; | |
507 | ||
508 | ||
509 | BT_DBG("sk %p", sk); | |
510 | ||
6503d961 CG |
511 | if (alen < sizeof(struct sockaddr_sco) || |
512 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
513 | return -EINVAL; |
514 | ||
515 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
516 | return -EBADFD; | |
517 | ||
518 | if (sk->sk_type != SOCK_SEQPACKET) | |
519 | return -EINVAL; | |
520 | ||
521 | lock_sock(sk); | |
522 | ||
523 | /* Set destination address and psm */ | |
524 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
525 | ||
735cbc47 AE |
526 | err = sco_connect(sk); |
527 | if (err) | |
1da177e4 LT |
528 | goto done; |
529 | ||
8e87d142 | 530 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
1da177e4 LT |
531 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
532 | ||
533 | done: | |
534 | release_sock(sk); | |
535 | return err; | |
536 | } | |
537 | ||
538 | static int sco_sock_listen(struct socket *sock, int backlog) | |
539 | { | |
540 | struct sock *sk = sock->sk; | |
541 | int err = 0; | |
542 | ||
543 | BT_DBG("sk %p backlog %d", sk, backlog); | |
544 | ||
545 | lock_sock(sk); | |
546 | ||
547 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
548 | err = -EBADFD; | |
549 | goto done; | |
550 | } | |
551 | ||
552 | sk->sk_max_ack_backlog = backlog; | |
553 | sk->sk_ack_backlog = 0; | |
554 | sk->sk_state = BT_LISTEN; | |
555 | ||
556 | done: | |
557 | release_sock(sk); | |
558 | return err; | |
559 | } | |
560 | ||
561 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
562 | { | |
563 | DECLARE_WAITQUEUE(wait, current); | |
564 | struct sock *sk = sock->sk, *ch; | |
565 | long timeo; | |
566 | int err = 0; | |
567 | ||
568 | lock_sock(sk); | |
569 | ||
1da177e4 LT |
570 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
571 | ||
572 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
573 | ||
574 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 575 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
552b0d3c | 576 | while (1) { |
1da177e4 | 577 | set_current_state(TASK_INTERRUPTIBLE); |
552b0d3c PH |
578 | |
579 | if (sk->sk_state != BT_LISTEN) { | |
580 | err = -EBADFD; | |
1da177e4 LT |
581 | break; |
582 | } | |
583 | ||
552b0d3c PH |
584 | ch = bt_accept_dequeue(sk, newsock); |
585 | if (ch) | |
586 | break; | |
1da177e4 | 587 | |
552b0d3c PH |
588 | if (!timeo) { |
589 | err = -EAGAIN; | |
1da177e4 LT |
590 | break; |
591 | } | |
592 | ||
593 | if (signal_pending(current)) { | |
594 | err = sock_intr_errno(timeo); | |
595 | break; | |
596 | } | |
552b0d3c PH |
597 | |
598 | release_sock(sk); | |
599 | timeo = schedule_timeout(timeo); | |
600 | lock_sock(sk); | |
1da177e4 | 601 | } |
552b0d3c | 602 | __set_current_state(TASK_RUNNING); |
aa395145 | 603 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
604 | |
605 | if (err) | |
606 | goto done; | |
607 | ||
608 | newsock->state = SS_CONNECTED; | |
609 | ||
610 | BT_DBG("new socket %p", ch); | |
611 | ||
612 | done: | |
613 | release_sock(sk); | |
614 | return err; | |
615 | } | |
616 | ||
617 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
618 | { | |
619 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
620 | struct sock *sk = sock->sk; | |
621 | ||
622 | BT_DBG("sock %p, sk %p", sock, sk); | |
623 | ||
624 | addr->sa_family = AF_BLUETOOTH; | |
625 | *len = sizeof(struct sockaddr_sco); | |
626 | ||
627 | if (peer) | |
628 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
629 | else | |
630 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
631 | ||
632 | return 0; | |
633 | } | |
634 | ||
8e87d142 | 635 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
636 | struct msghdr *msg, size_t len) |
637 | { | |
638 | struct sock *sk = sock->sk; | |
b9dbdbc1 | 639 | int err; |
1da177e4 LT |
640 | |
641 | BT_DBG("sock %p, sk %p", sock, sk); | |
642 | ||
c1cbe4b7 BL |
643 | err = sock_error(sk); |
644 | if (err) | |
645 | return err; | |
1da177e4 LT |
646 | |
647 | if (msg->msg_flags & MSG_OOB) | |
648 | return -EOPNOTSUPP; | |
649 | ||
650 | lock_sock(sk); | |
651 | ||
652 | if (sk->sk_state == BT_CONNECTED) | |
653 | err = sco_send_frame(sk, msg, len); | |
654 | else | |
655 | err = -ENOTCONN; | |
656 | ||
657 | release_sock(sk); | |
658 | return err; | |
659 | } | |
660 | ||
b7058842 | 661 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
662 | { |
663 | struct sock *sk = sock->sk; | |
664 | int err = 0; | |
665 | ||
666 | BT_DBG("sk %p", sk); | |
667 | ||
668 | lock_sock(sk); | |
669 | ||
670 | switch (optname) { | |
671 | default: | |
672 | err = -ENOPROTOOPT; | |
673 | break; | |
674 | } | |
675 | ||
676 | release_sock(sk); | |
677 | return err; | |
678 | } | |
679 | ||
d58daf42 | 680 | static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
681 | { |
682 | struct sock *sk = sock->sk; | |
683 | struct sco_options opts; | |
684 | struct sco_conninfo cinfo; | |
8e87d142 | 685 | int len, err = 0; |
1da177e4 LT |
686 | |
687 | BT_DBG("sk %p", sk); | |
688 | ||
689 | if (get_user(len, optlen)) | |
690 | return -EFAULT; | |
691 | ||
692 | lock_sock(sk); | |
693 | ||
694 | switch (optname) { | |
695 | case SCO_OPTIONS: | |
696 | if (sk->sk_state != BT_CONNECTED) { | |
697 | err = -ENOTCONN; | |
698 | break; | |
699 | } | |
700 | ||
701 | opts.mtu = sco_pi(sk)->conn->mtu; | |
702 | ||
703 | BT_DBG("mtu %d", opts.mtu); | |
704 | ||
705 | len = min_t(unsigned int, len, sizeof(opts)); | |
706 | if (copy_to_user(optval, (char *)&opts, len)) | |
707 | err = -EFAULT; | |
708 | ||
709 | break; | |
710 | ||
711 | case SCO_CONNINFO: | |
712 | if (sk->sk_state != BT_CONNECTED) { | |
713 | err = -ENOTCONN; | |
714 | break; | |
715 | } | |
716 | ||
c4c896e1 | 717 | memset(&cinfo, 0, sizeof(cinfo)); |
1da177e4 LT |
718 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; |
719 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
720 | ||
721 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
722 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
723 | err = -EFAULT; | |
724 | ||
725 | break; | |
726 | ||
727 | default: | |
728 | err = -ENOPROTOOPT; | |
729 | break; | |
730 | } | |
731 | ||
732 | release_sock(sk); | |
733 | return err; | |
734 | } | |
735 | ||
d58daf42 MH |
736 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
737 | { | |
738 | struct sock *sk = sock->sk; | |
739 | int len, err = 0; | |
740 | ||
741 | BT_DBG("sk %p", sk); | |
742 | ||
743 | if (level == SOL_SCO) | |
744 | return sco_sock_getsockopt_old(sock, optname, optval, optlen); | |
745 | ||
746 | if (get_user(len, optlen)) | |
747 | return -EFAULT; | |
748 | ||
749 | lock_sock(sk); | |
750 | ||
751 | switch (optname) { | |
752 | default: | |
753 | err = -ENOPROTOOPT; | |
754 | break; | |
755 | } | |
756 | ||
757 | release_sock(sk); | |
758 | return err; | |
759 | } | |
760 | ||
fd0b3ff7 MH |
761 | static int sco_sock_shutdown(struct socket *sock, int how) |
762 | { | |
763 | struct sock *sk = sock->sk; | |
764 | int err = 0; | |
765 | ||
766 | BT_DBG("sock %p, sk %p", sock, sk); | |
767 | ||
768 | if (!sk) | |
769 | return 0; | |
770 | ||
771 | lock_sock(sk); | |
772 | if (!sk->sk_shutdown) { | |
773 | sk->sk_shutdown = SHUTDOWN_MASK; | |
774 | sco_sock_clear_timer(sk); | |
775 | __sco_sock_close(sk); | |
776 | ||
777 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
778 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
779 | sk->sk_lingertime); | |
780 | } | |
781 | release_sock(sk); | |
782 | return err; | |
783 | } | |
784 | ||
1da177e4 LT |
785 | static int sco_sock_release(struct socket *sock) |
786 | { | |
787 | struct sock *sk = sock->sk; | |
788 | int err = 0; | |
789 | ||
790 | BT_DBG("sock %p, sk %p", sock, sk); | |
791 | ||
792 | if (!sk) | |
793 | return 0; | |
794 | ||
795 | sco_sock_close(sk); | |
796 | ||
797 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
798 | lock_sock(sk); | |
799 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
800 | release_sock(sk); | |
801 | } | |
802 | ||
803 | sock_orphan(sk); | |
804 | sco_sock_kill(sk); | |
805 | return err; | |
806 | } | |
807 | ||
808 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
809 | { | |
810 | BT_DBG("conn %p", conn); | |
811 | ||
812 | sco_pi(sk)->conn = conn; | |
813 | conn->sk = sk; | |
814 | ||
815 | if (parent) | |
816 | bt_accept_enqueue(parent, sk); | |
817 | } | |
818 | ||
8e87d142 | 819 | /* Delete channel. |
1da177e4 LT |
820 | * Must be called on the locked socket. */ |
821 | static void sco_chan_del(struct sock *sk, int err) | |
822 | { | |
823 | struct sco_conn *conn; | |
824 | ||
825 | conn = sco_pi(sk)->conn; | |
826 | ||
827 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
828 | ||
8e87d142 | 829 | if (conn) { |
1da177e4 LT |
830 | sco_conn_lock(conn); |
831 | conn->sk = NULL; | |
832 | sco_pi(sk)->conn = NULL; | |
833 | sco_conn_unlock(conn); | |
4a77708b LAD |
834 | |
835 | if (conn->hcon) | |
836 | hci_conn_put(conn->hcon); | |
1da177e4 LT |
837 | } |
838 | ||
839 | sk->sk_state = BT_CLOSED; | |
840 | sk->sk_err = err; | |
841 | sk->sk_state_change(sk); | |
842 | ||
843 | sock_set_flag(sk, SOCK_ZAPPED); | |
844 | } | |
845 | ||
846 | static void sco_conn_ready(struct sco_conn *conn) | |
847 | { | |
735cbc47 AE |
848 | struct sock *parent; |
849 | struct sock *sk = conn->sk; | |
1da177e4 LT |
850 | |
851 | BT_DBG("conn %p", conn); | |
852 | ||
853 | sco_conn_lock(conn); | |
854 | ||
735cbc47 | 855 | if (sk) { |
1da177e4 LT |
856 | sco_sock_clear_timer(sk); |
857 | bh_lock_sock(sk); | |
858 | sk->sk_state = BT_CONNECTED; | |
859 | sk->sk_state_change(sk); | |
860 | bh_unlock_sock(sk); | |
861 | } else { | |
862 | parent = sco_get_sock_listen(conn->src); | |
863 | if (!parent) | |
864 | goto done; | |
865 | ||
866 | bh_lock_sock(parent); | |
867 | ||
b9dbdbc1 GP |
868 | sk = sco_sock_alloc(sock_net(parent), NULL, |
869 | BTPROTO_SCO, GFP_ATOMIC); | |
1da177e4 LT |
870 | if (!sk) { |
871 | bh_unlock_sock(parent); | |
872 | goto done; | |
873 | } | |
874 | ||
875 | sco_sock_init(sk, parent); | |
876 | ||
877 | bacpy(&bt_sk(sk)->src, conn->src); | |
878 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
879 | ||
880 | hci_conn_hold(conn->hcon); | |
881 | __sco_chan_add(conn, sk, parent); | |
882 | ||
883 | sk->sk_state = BT_CONNECTED; | |
884 | ||
885 | /* Wake up parent */ | |
886 | parent->sk_data_ready(parent, 1); | |
887 | ||
888 | bh_unlock_sock(parent); | |
889 | } | |
890 | ||
891 | done: | |
892 | sco_conn_unlock(conn); | |
893 | } | |
894 | ||
895 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
896 | static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type) | |
897 | { | |
71aeeaa1 MH |
898 | register struct sock *sk; |
899 | struct hlist_node *node; | |
900 | int lm = 0; | |
901 | ||
902 | if (type != SCO_LINK && type != ESCO_LINK) | |
c89ad737 | 903 | return -EINVAL; |
71aeeaa1 | 904 | |
1da177e4 LT |
905 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
906 | ||
71aeeaa1 MH |
907 | /* Find listening sockets */ |
908 | read_lock(&sco_sk_list.lock); | |
909 | sk_for_each(sk, node, &sco_sk_list.head) { | |
910 | if (sk->sk_state != BT_LISTEN) | |
911 | continue; | |
912 | ||
913 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || | |
914 | !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { | |
915 | lm |= HCI_LM_ACCEPT; | |
916 | break; | |
917 | } | |
918 | } | |
919 | read_unlock(&sco_sk_list.lock); | |
920 | ||
921 | return lm; | |
1da177e4 LT |
922 | } |
923 | ||
924 | static int sco_connect_cfm(struct hci_conn *hcon, __u8 status) | |
925 | { | |
926 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
927 | ||
b6a0dc82 | 928 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
c89ad737 | 929 | return -EINVAL; |
1da177e4 LT |
930 | |
931 | if (!status) { | |
932 | struct sco_conn *conn; | |
933 | ||
934 | conn = sco_conn_add(hcon, status); | |
935 | if (conn) | |
936 | sco_conn_ready(conn); | |
8e87d142 | 937 | } else |
e175072f | 938 | sco_conn_del(hcon, bt_to_errno(status)); |
1da177e4 LT |
939 | |
940 | return 0; | |
941 | } | |
942 | ||
2950f21a | 943 | static int sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
1da177e4 LT |
944 | { |
945 | BT_DBG("hcon %p reason %d", hcon, reason); | |
946 | ||
b6a0dc82 | 947 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
c89ad737 | 948 | return -EINVAL; |
1da177e4 | 949 | |
e175072f | 950 | sco_conn_del(hcon, bt_to_errno(reason)); |
b6a0dc82 | 951 | |
1da177e4 LT |
952 | return 0; |
953 | } | |
954 | ||
955 | static int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) | |
956 | { | |
957 | struct sco_conn *conn = hcon->sco_data; | |
958 | ||
959 | if (!conn) | |
960 | goto drop; | |
961 | ||
962 | BT_DBG("conn %p len %d", conn, skb->len); | |
963 | ||
964 | if (skb->len) { | |
965 | sco_recv_frame(conn, skb); | |
966 | return 0; | |
967 | } | |
968 | ||
969 | drop: | |
8e87d142 | 970 | kfree_skb(skb); |
1da177e4 LT |
971 | return 0; |
972 | } | |
973 | ||
aef7d97c | 974 | static int sco_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
975 | { |
976 | struct sock *sk; | |
977 | struct hlist_node *node; | |
1da177e4 LT |
978 | |
979 | read_lock_bh(&sco_sk_list.lock); | |
980 | ||
be9d1227 | 981 | sk_for_each(sk, node, &sco_sk_list.head) { |
aef7d97c MH |
982 | seq_printf(f, "%s %s %d\n", batostr(&bt_sk(sk)->src), |
983 | batostr(&bt_sk(sk)->dst), sk->sk_state); | |
be9d1227 | 984 | } |
1da177e4 | 985 | |
1da177e4 | 986 | read_unlock_bh(&sco_sk_list.lock); |
1da177e4 | 987 | |
aef7d97c | 988 | return 0; |
1da177e4 LT |
989 | } |
990 | ||
aef7d97c MH |
991 | static int sco_debugfs_open(struct inode *inode, struct file *file) |
992 | { | |
993 | return single_open(file, sco_debugfs_show, inode->i_private); | |
994 | } | |
995 | ||
996 | static const struct file_operations sco_debugfs_fops = { | |
997 | .open = sco_debugfs_open, | |
998 | .read = seq_read, | |
999 | .llseek = seq_lseek, | |
1000 | .release = single_release, | |
1001 | }; | |
1002 | ||
1003 | static struct dentry *sco_debugfs; | |
1da177e4 | 1004 | |
90ddc4f0 | 1005 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
1006 | .family = PF_BLUETOOTH, |
1007 | .owner = THIS_MODULE, | |
1008 | .release = sco_sock_release, | |
1009 | .bind = sco_sock_bind, | |
1010 | .connect = sco_sock_connect, | |
1011 | .listen = sco_sock_listen, | |
1012 | .accept = sco_sock_accept, | |
1013 | .getname = sco_sock_getname, | |
1014 | .sendmsg = sco_sock_sendmsg, | |
1015 | .recvmsg = bt_sock_recvmsg, | |
1016 | .poll = bt_sock_poll, | |
3241ad82 | 1017 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
1018 | .mmap = sock_no_mmap, |
1019 | .socketpair = sock_no_socketpair, | |
fd0b3ff7 | 1020 | .shutdown = sco_sock_shutdown, |
1da177e4 LT |
1021 | .setsockopt = sco_sock_setsockopt, |
1022 | .getsockopt = sco_sock_getsockopt | |
1023 | }; | |
1024 | ||
ec1b4cf7 | 1025 | static const struct net_proto_family sco_sock_family_ops = { |
1da177e4 LT |
1026 | .family = PF_BLUETOOTH, |
1027 | .owner = THIS_MODULE, | |
1028 | .create = sco_sock_create, | |
1029 | }; | |
1030 | ||
1031 | static struct hci_proto sco_hci_proto = { | |
1032 | .name = "SCO", | |
1033 | .id = HCI_PROTO_SCO, | |
1034 | .connect_ind = sco_connect_ind, | |
1035 | .connect_cfm = sco_connect_cfm, | |
2950f21a | 1036 | .disconn_cfm = sco_disconn_cfm, |
1da177e4 LT |
1037 | .recv_scodata = sco_recv_scodata |
1038 | }; | |
1039 | ||
64274518 | 1040 | int __init sco_init(void) |
1da177e4 LT |
1041 | { |
1042 | int err; | |
1043 | ||
1044 | err = proto_register(&sco_proto, 0); | |
1045 | if (err < 0) | |
1046 | return err; | |
1047 | ||
1048 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1049 | if (err < 0) { | |
1050 | BT_ERR("SCO socket registration failed"); | |
1051 | goto error; | |
1052 | } | |
1053 | ||
1054 | err = hci_register_proto(&sco_hci_proto); | |
1055 | if (err < 0) { | |
1056 | BT_ERR("SCO protocol registration failed"); | |
1057 | bt_sock_unregister(BTPROTO_SCO); | |
1058 | goto error; | |
1059 | } | |
1060 | ||
aef7d97c MH |
1061 | if (bt_debugfs) { |
1062 | sco_debugfs = debugfs_create_file("sco", 0444, | |
1063 | bt_debugfs, NULL, &sco_debugfs_fops); | |
1064 | if (!sco_debugfs) | |
1065 | BT_ERR("Failed to create SCO debug file"); | |
1066 | } | |
1da177e4 | 1067 | |
1da177e4 LT |
1068 | BT_INFO("SCO socket layer initialized"); |
1069 | ||
1070 | return 0; | |
1071 | ||
1072 | error: | |
1073 | proto_unregister(&sco_proto); | |
1074 | return err; | |
1075 | } | |
1076 | ||
64274518 | 1077 | void __exit sco_exit(void) |
1da177e4 | 1078 | { |
aef7d97c | 1079 | debugfs_remove(sco_debugfs); |
1da177e4 LT |
1080 | |
1081 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1082 | BT_ERR("SCO socket unregistration failed"); | |
1083 | ||
1084 | if (hci_unregister_proto(&sco_hci_proto) < 0) | |
1085 | BT_ERR("SCO protocol unregistration failed"); | |
1086 | ||
1087 | proto_unregister(&sco_proto); | |
1088 | } | |
1089 | ||
7cb127d5 MH |
1090 | module_param(disable_esco, bool, 0644); |
1091 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); |