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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 LT |
43 | #include <linux/list.h> |
44 | #include <net/sock.h> | |
45 | ||
46 | #include <asm/system.h> | |
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 | ||
735cbc47 | 53 | static int 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 | ||
64 | static int sco_conn_del(struct hci_conn *conn, int err); | |
65 | ||
66 | static void sco_sock_close(struct sock *sk); | |
67 | static void sco_sock_kill(struct sock *sk); | |
68 | ||
69 | /* ---- SCO timers ---- */ | |
70 | static void sco_sock_timeout(unsigned long arg) | |
71 | { | |
72 | struct sock *sk = (struct sock *) arg; | |
73 | ||
74 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
75 | ||
76 | bh_lock_sock(sk); | |
77 | sk->sk_err = ETIMEDOUT; | |
78 | sk->sk_state_change(sk); | |
79 | bh_unlock_sock(sk); | |
80 | ||
81 | sco_sock_kill(sk); | |
82 | sock_put(sk); | |
83 | } | |
84 | ||
85 | static void sco_sock_set_timer(struct sock *sk, long timeout) | |
86 | { | |
87 | BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout); | |
88 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); | |
89 | } | |
90 | ||
91 | static void sco_sock_clear_timer(struct sock *sk) | |
92 | { | |
93 | BT_DBG("sock %p state %d", sk, sk->sk_state); | |
94 | sk_stop_timer(sk, &sk->sk_timer); | |
95 | } | |
96 | ||
1da177e4 LT |
97 | /* ---- SCO connections ---- */ |
98 | static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status) | |
99 | { | |
100 | struct hci_dev *hdev = hcon->hdev; | |
25ea6db0 | 101 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 | 102 | |
25ea6db0 | 103 | if (conn || status) |
1da177e4 LT |
104 | return conn; |
105 | ||
25ea6db0 MH |
106 | conn = kzalloc(sizeof(struct sco_conn), GFP_ATOMIC); |
107 | if (!conn) | |
1da177e4 | 108 | return NULL; |
1da177e4 LT |
109 | |
110 | spin_lock_init(&conn->lock); | |
111 | ||
112 | hcon->sco_data = conn; | |
113 | conn->hcon = hcon; | |
114 | ||
115 | conn->src = &hdev->bdaddr; | |
116 | conn->dst = &hcon->dst; | |
117 | ||
118 | if (hdev->sco_mtu > 0) | |
119 | conn->mtu = hdev->sco_mtu; | |
120 | else | |
121 | conn->mtu = 60; | |
122 | ||
123 | BT_DBG("hcon %p conn %p", hcon, conn); | |
25ea6db0 | 124 | |
1da177e4 LT |
125 | return conn; |
126 | } | |
127 | ||
128 | static inline struct sock *sco_chan_get(struct sco_conn *conn) | |
129 | { | |
130 | struct sock *sk = NULL; | |
131 | sco_conn_lock(conn); | |
132 | sk = conn->sk; | |
133 | sco_conn_unlock(conn); | |
134 | return sk; | |
135 | } | |
136 | ||
137 | static int sco_conn_del(struct hci_conn *hcon, int err) | |
138 | { | |
735cbc47 | 139 | struct sco_conn *conn = hcon->sco_data; |
1da177e4 LT |
140 | struct sock *sk; |
141 | ||
735cbc47 | 142 | if (!conn) |
1da177e4 LT |
143 | return 0; |
144 | ||
145 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); | |
146 | ||
147 | /* Kill socket */ | |
735cbc47 AE |
148 | sk = sco_chan_get(conn); |
149 | if (sk) { | |
1da177e4 LT |
150 | bh_lock_sock(sk); |
151 | sco_sock_clear_timer(sk); | |
152 | sco_chan_del(sk, err); | |
153 | bh_unlock_sock(sk); | |
154 | sco_sock_kill(sk); | |
155 | } | |
156 | ||
157 | hcon->sco_data = NULL; | |
158 | kfree(conn); | |
159 | return 0; | |
160 | } | |
161 | ||
162 | static inline int sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
163 | { | |
164 | int err = 0; | |
165 | ||
166 | sco_conn_lock(conn); | |
b9dbdbc1 | 167 | if (conn->sk) |
1da177e4 | 168 | err = -EBUSY; |
b9dbdbc1 | 169 | else |
1da177e4 | 170 | __sco_chan_add(conn, sk, parent); |
b9dbdbc1 | 171 | |
1da177e4 LT |
172 | sco_conn_unlock(conn); |
173 | return err; | |
174 | } | |
175 | ||
176 | static int sco_connect(struct sock *sk) | |
177 | { | |
178 | bdaddr_t *src = &bt_sk(sk)->src; | |
179 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
180 | struct sco_conn *conn; | |
181 | struct hci_conn *hcon; | |
182 | struct hci_dev *hdev; | |
b6a0dc82 | 183 | int err, type; |
1da177e4 LT |
184 | |
185 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
186 | ||
735cbc47 AE |
187 | hdev = hci_get_route(dst, src); |
188 | if (!hdev) | |
1da177e4 LT |
189 | return -EHOSTUNREACH; |
190 | ||
191 | hci_dev_lock_bh(hdev); | |
192 | ||
7cb127d5 MH |
193 | if (lmp_esco_capable(hdev) && !disable_esco) |
194 | type = ESCO_LINK; | |
195 | else | |
196 | type = SCO_LINK; | |
b6a0dc82 | 197 | |
8c1b2355 | 198 | hcon = hci_connect(hdev, type, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING); |
30e76272 VT |
199 | if (IS_ERR(hcon)) { |
200 | err = PTR_ERR(hcon); | |
1da177e4 | 201 | goto done; |
30e76272 | 202 | } |
1da177e4 LT |
203 | |
204 | conn = sco_conn_add(hcon, 0); | |
205 | if (!conn) { | |
206 | hci_conn_put(hcon); | |
30e76272 | 207 | err = -ENOMEM; |
1da177e4 LT |
208 | goto done; |
209 | } | |
210 | ||
211 | /* Update source addr of the socket */ | |
212 | bacpy(src, conn->src); | |
213 | ||
214 | err = sco_chan_add(conn, sk, NULL); | |
215 | if (err) | |
216 | goto done; | |
217 | ||
218 | if (hcon->state == BT_CONNECTED) { | |
219 | sco_sock_clear_timer(sk); | |
220 | sk->sk_state = BT_CONNECTED; | |
221 | } else { | |
222 | sk->sk_state = BT_CONNECT; | |
223 | sco_sock_set_timer(sk, sk->sk_sndtimeo); | |
224 | } | |
b6a0dc82 | 225 | |
1da177e4 LT |
226 | done: |
227 | hci_dev_unlock_bh(hdev); | |
228 | hci_dev_put(hdev); | |
229 | return err; | |
230 | } | |
231 | ||
232 | static inline int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) | |
233 | { | |
234 | struct sco_conn *conn = sco_pi(sk)->conn; | |
235 | struct sk_buff *skb; | |
236 | int err, count; | |
237 | ||
238 | /* Check outgoing MTU */ | |
239 | if (len > conn->mtu) | |
240 | return -EINVAL; | |
241 | ||
242 | BT_DBG("sk %p len %d", sk, len); | |
243 | ||
244 | count = min_t(unsigned int, conn->mtu, len); | |
b9dbdbc1 GP |
245 | skb = bt_skb_send_alloc(sk, count, |
246 | msg->msg_flags & MSG_DONTWAIT, &err); | |
247 | if (!skb) | |
1da177e4 LT |
248 | return err; |
249 | ||
250 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { | |
b9dbdbc1 GP |
251 | kfree_skb(skb); |
252 | return -EFAULT; | |
1da177e4 LT |
253 | } |
254 | ||
0d861d8b | 255 | hci_send_sco(conn->hcon, skb); |
1da177e4 LT |
256 | |
257 | return count; | |
1da177e4 LT |
258 | } |
259 | ||
260 | static inline void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) | |
261 | { | |
262 | struct sock *sk = sco_chan_get(conn); | |
263 | ||
264 | if (!sk) | |
265 | goto drop; | |
266 | ||
267 | BT_DBG("sk %p len %d", sk, skb->len); | |
268 | ||
269 | if (sk->sk_state != BT_CONNECTED) | |
270 | goto drop; | |
271 | ||
272 | if (!sock_queue_rcv_skb(sk, skb)) | |
273 | return; | |
274 | ||
275 | drop: | |
276 | kfree_skb(skb); | |
1da177e4 LT |
277 | } |
278 | ||
279 | /* -------- Socket interface ---------- */ | |
280 | static struct sock *__sco_get_sock_by_addr(bdaddr_t *ba) | |
281 | { | |
282 | struct sock *sk; | |
283 | struct hlist_node *node; | |
284 | ||
285 | sk_for_each(sk, node, &sco_sk_list.head) | |
286 | if (!bacmp(&bt_sk(sk)->src, ba)) | |
287 | goto found; | |
288 | sk = NULL; | |
289 | found: | |
290 | return sk; | |
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 | ||
8e87d142 | 406 | if (parent) |
1da177e4 LT |
407 | sk->sk_type = parent->sk_type; |
408 | } | |
409 | ||
410 | static struct proto sco_proto = { | |
411 | .name = "SCO", | |
412 | .owner = THIS_MODULE, | |
413 | .obj_size = sizeof(struct sco_pinfo) | |
414 | }; | |
415 | ||
1b8d7ae4 | 416 | static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
417 | { |
418 | struct sock *sk; | |
419 | ||
6257ff21 | 420 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto); |
1da177e4 LT |
421 | if (!sk) |
422 | return NULL; | |
423 | ||
424 | sock_init_data(sock, sk); | |
425 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
426 | ||
427 | sk->sk_destruct = sco_sock_destruct; | |
428 | sk->sk_sndtimeo = SCO_CONN_TIMEOUT; | |
429 | ||
430 | sock_reset_flag(sk, SOCK_ZAPPED); | |
431 | ||
432 | sk->sk_protocol = proto; | |
433 | sk->sk_state = BT_OPEN; | |
434 | ||
b24b8a24 | 435 | setup_timer(&sk->sk_timer, sco_sock_timeout, (unsigned long)sk); |
1da177e4 LT |
436 | |
437 | bt_sock_link(&sco_sk_list, sk); | |
438 | return sk; | |
439 | } | |
440 | ||
3f378b68 EP |
441 | static int sco_sock_create(struct net *net, struct socket *sock, int protocol, |
442 | int kern) | |
1da177e4 LT |
443 | { |
444 | struct sock *sk; | |
445 | ||
446 | BT_DBG("sock %p", sock); | |
447 | ||
448 | sock->state = SS_UNCONNECTED; | |
449 | ||
450 | if (sock->type != SOCK_SEQPACKET) | |
451 | return -ESOCKTNOSUPPORT; | |
452 | ||
453 | sock->ops = &sco_sock_ops; | |
454 | ||
1b8d7ae4 | 455 | sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 456 | if (!sk) |
1da177e4 LT |
457 | return -ENOMEM; |
458 | ||
459 | sco_sock_init(sk, NULL); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
464 | { | |
465 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
466 | struct sock *sk = sock->sk; | |
467 | bdaddr_t *src = &sa->sco_bdaddr; | |
468 | int err = 0; | |
469 | ||
470 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
471 | ||
472 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
473 | return -EINVAL; | |
474 | ||
475 | lock_sock(sk); | |
476 | ||
477 | if (sk->sk_state != BT_OPEN) { | |
478 | err = -EBADFD; | |
479 | goto done; | |
480 | } | |
481 | ||
482 | write_lock_bh(&sco_sk_list.lock); | |
483 | ||
484 | if (bacmp(src, BDADDR_ANY) && __sco_get_sock_by_addr(src)) { | |
485 | err = -EADDRINUSE; | |
486 | } else { | |
487 | /* Save source address */ | |
488 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); | |
489 | sk->sk_state = BT_BOUND; | |
490 | } | |
491 | ||
492 | write_unlock_bh(&sco_sk_list.lock); | |
493 | ||
494 | done: | |
495 | release_sock(sk); | |
496 | return err; | |
497 | } | |
498 | ||
499 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
500 | { | |
501 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
502 | struct sock *sk = sock->sk; | |
503 | int err = 0; | |
504 | ||
505 | ||
506 | BT_DBG("sk %p", sk); | |
507 | ||
6503d961 CG |
508 | if (alen < sizeof(struct sockaddr_sco) || |
509 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
510 | return -EINVAL; |
511 | ||
512 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
513 | return -EBADFD; | |
514 | ||
515 | if (sk->sk_type != SOCK_SEQPACKET) | |
516 | return -EINVAL; | |
517 | ||
518 | lock_sock(sk); | |
519 | ||
520 | /* Set destination address and psm */ | |
521 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
522 | ||
735cbc47 AE |
523 | err = sco_connect(sk); |
524 | if (err) | |
1da177e4 LT |
525 | goto done; |
526 | ||
8e87d142 | 527 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
1da177e4 LT |
528 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
529 | ||
530 | done: | |
531 | release_sock(sk); | |
532 | return err; | |
533 | } | |
534 | ||
535 | static int sco_sock_listen(struct socket *sock, int backlog) | |
536 | { | |
537 | struct sock *sk = sock->sk; | |
538 | int err = 0; | |
539 | ||
540 | BT_DBG("sk %p backlog %d", sk, backlog); | |
541 | ||
542 | lock_sock(sk); | |
543 | ||
544 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { | |
545 | err = -EBADFD; | |
546 | goto done; | |
547 | } | |
548 | ||
549 | sk->sk_max_ack_backlog = backlog; | |
550 | sk->sk_ack_backlog = 0; | |
551 | sk->sk_state = BT_LISTEN; | |
552 | ||
553 | done: | |
554 | release_sock(sk); | |
555 | return err; | |
556 | } | |
557 | ||
558 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
559 | { | |
560 | DECLARE_WAITQUEUE(wait, current); | |
561 | struct sock *sk = sock->sk, *ch; | |
562 | long timeo; | |
563 | int err = 0; | |
564 | ||
565 | lock_sock(sk); | |
566 | ||
1da177e4 LT |
567 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
568 | ||
569 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
570 | ||
571 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 572 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
552b0d3c | 573 | while (1) { |
1da177e4 | 574 | set_current_state(TASK_INTERRUPTIBLE); |
552b0d3c PH |
575 | |
576 | if (sk->sk_state != BT_LISTEN) { | |
577 | err = -EBADFD; | |
1da177e4 LT |
578 | break; |
579 | } | |
580 | ||
552b0d3c PH |
581 | ch = bt_accept_dequeue(sk, newsock); |
582 | if (ch) | |
583 | break; | |
1da177e4 | 584 | |
552b0d3c PH |
585 | if (!timeo) { |
586 | err = -EAGAIN; | |
1da177e4 LT |
587 | break; |
588 | } | |
589 | ||
590 | if (signal_pending(current)) { | |
591 | err = sock_intr_errno(timeo); | |
592 | break; | |
593 | } | |
552b0d3c PH |
594 | |
595 | release_sock(sk); | |
596 | timeo = schedule_timeout(timeo); | |
597 | lock_sock(sk); | |
1da177e4 | 598 | } |
552b0d3c | 599 | __set_current_state(TASK_RUNNING); |
aa395145 | 600 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
601 | |
602 | if (err) | |
603 | goto done; | |
604 | ||
605 | newsock->state = SS_CONNECTED; | |
606 | ||
607 | BT_DBG("new socket %p", ch); | |
608 | ||
609 | done: | |
610 | release_sock(sk); | |
611 | return err; | |
612 | } | |
613 | ||
614 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
615 | { | |
616 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
617 | struct sock *sk = sock->sk; | |
618 | ||
619 | BT_DBG("sock %p, sk %p", sock, sk); | |
620 | ||
621 | addr->sa_family = AF_BLUETOOTH; | |
622 | *len = sizeof(struct sockaddr_sco); | |
623 | ||
624 | if (peer) | |
625 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
626 | else | |
627 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
8e87d142 | 632 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
633 | struct msghdr *msg, size_t len) |
634 | { | |
635 | struct sock *sk = sock->sk; | |
b9dbdbc1 | 636 | int err; |
1da177e4 LT |
637 | |
638 | BT_DBG("sock %p, sk %p", sock, sk); | |
639 | ||
c1cbe4b7 BL |
640 | err = sock_error(sk); |
641 | if (err) | |
642 | return err; | |
1da177e4 LT |
643 | |
644 | if (msg->msg_flags & MSG_OOB) | |
645 | return -EOPNOTSUPP; | |
646 | ||
647 | lock_sock(sk); | |
648 | ||
649 | if (sk->sk_state == BT_CONNECTED) | |
650 | err = sco_send_frame(sk, msg, len); | |
651 | else | |
652 | err = -ENOTCONN; | |
653 | ||
654 | release_sock(sk); | |
655 | return err; | |
656 | } | |
657 | ||
b7058842 | 658 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
659 | { |
660 | struct sock *sk = sock->sk; | |
661 | int err = 0; | |
662 | ||
663 | BT_DBG("sk %p", sk); | |
664 | ||
665 | lock_sock(sk); | |
666 | ||
667 | switch (optname) { | |
668 | default: | |
669 | err = -ENOPROTOOPT; | |
670 | break; | |
671 | } | |
672 | ||
673 | release_sock(sk); | |
674 | return err; | |
675 | } | |
676 | ||
d58daf42 | 677 | static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
678 | { |
679 | struct sock *sk = sock->sk; | |
680 | struct sco_options opts; | |
681 | struct sco_conninfo cinfo; | |
8e87d142 | 682 | int len, err = 0; |
1da177e4 LT |
683 | |
684 | BT_DBG("sk %p", sk); | |
685 | ||
686 | if (get_user(len, optlen)) | |
687 | return -EFAULT; | |
688 | ||
689 | lock_sock(sk); | |
690 | ||
691 | switch (optname) { | |
692 | case SCO_OPTIONS: | |
693 | if (sk->sk_state != BT_CONNECTED) { | |
694 | err = -ENOTCONN; | |
695 | break; | |
696 | } | |
697 | ||
698 | opts.mtu = sco_pi(sk)->conn->mtu; | |
699 | ||
700 | BT_DBG("mtu %d", opts.mtu); | |
701 | ||
702 | len = min_t(unsigned int, len, sizeof(opts)); | |
703 | if (copy_to_user(optval, (char *)&opts, len)) | |
704 | err = -EFAULT; | |
705 | ||
706 | break; | |
707 | ||
708 | case SCO_CONNINFO: | |
709 | if (sk->sk_state != BT_CONNECTED) { | |
710 | err = -ENOTCONN; | |
711 | break; | |
712 | } | |
713 | ||
c4c896e1 | 714 | memset(&cinfo, 0, sizeof(cinfo)); |
1da177e4 LT |
715 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; |
716 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
717 | ||
718 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
719 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
720 | err = -EFAULT; | |
721 | ||
722 | break; | |
723 | ||
724 | default: | |
725 | err = -ENOPROTOOPT; | |
726 | break; | |
727 | } | |
728 | ||
729 | release_sock(sk); | |
730 | return err; | |
731 | } | |
732 | ||
d58daf42 MH |
733 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
734 | { | |
735 | struct sock *sk = sock->sk; | |
736 | int len, err = 0; | |
737 | ||
738 | BT_DBG("sk %p", sk); | |
739 | ||
740 | if (level == SOL_SCO) | |
741 | return sco_sock_getsockopt_old(sock, optname, optval, optlen); | |
742 | ||
743 | if (get_user(len, optlen)) | |
744 | return -EFAULT; | |
745 | ||
746 | lock_sock(sk); | |
747 | ||
748 | switch (optname) { | |
749 | default: | |
750 | err = -ENOPROTOOPT; | |
751 | break; | |
752 | } | |
753 | ||
754 | release_sock(sk); | |
755 | return err; | |
756 | } | |
757 | ||
fd0b3ff7 MH |
758 | static int sco_sock_shutdown(struct socket *sock, int how) |
759 | { | |
760 | struct sock *sk = sock->sk; | |
761 | int err = 0; | |
762 | ||
763 | BT_DBG("sock %p, sk %p", sock, sk); | |
764 | ||
765 | if (!sk) | |
766 | return 0; | |
767 | ||
768 | lock_sock(sk); | |
769 | if (!sk->sk_shutdown) { | |
770 | sk->sk_shutdown = SHUTDOWN_MASK; | |
771 | sco_sock_clear_timer(sk); | |
772 | __sco_sock_close(sk); | |
773 | ||
774 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
775 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
776 | sk->sk_lingertime); | |
777 | } | |
778 | release_sock(sk); | |
779 | return err; | |
780 | } | |
781 | ||
1da177e4 LT |
782 | static int sco_sock_release(struct socket *sock) |
783 | { | |
784 | struct sock *sk = sock->sk; | |
785 | int err = 0; | |
786 | ||
787 | BT_DBG("sock %p, sk %p", sock, sk); | |
788 | ||
789 | if (!sk) | |
790 | return 0; | |
791 | ||
792 | sco_sock_close(sk); | |
793 | ||
794 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
795 | lock_sock(sk); | |
796 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
797 | release_sock(sk); | |
798 | } | |
799 | ||
800 | sock_orphan(sk); | |
801 | sco_sock_kill(sk); | |
802 | return err; | |
803 | } | |
804 | ||
805 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
806 | { | |
807 | BT_DBG("conn %p", conn); | |
808 | ||
809 | sco_pi(sk)->conn = conn; | |
810 | conn->sk = sk; | |
811 | ||
812 | if (parent) | |
813 | bt_accept_enqueue(parent, sk); | |
814 | } | |
815 | ||
8e87d142 | 816 | /* Delete channel. |
1da177e4 LT |
817 | * Must be called on the locked socket. */ |
818 | static void sco_chan_del(struct sock *sk, int err) | |
819 | { | |
820 | struct sco_conn *conn; | |
821 | ||
822 | conn = sco_pi(sk)->conn; | |
823 | ||
824 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
825 | ||
8e87d142 | 826 | if (conn) { |
1da177e4 LT |
827 | sco_conn_lock(conn); |
828 | conn->sk = NULL; | |
829 | sco_pi(sk)->conn = NULL; | |
830 | sco_conn_unlock(conn); | |
4a77708b LAD |
831 | |
832 | if (conn->hcon) | |
833 | hci_conn_put(conn->hcon); | |
1da177e4 LT |
834 | } |
835 | ||
836 | sk->sk_state = BT_CLOSED; | |
837 | sk->sk_err = err; | |
838 | sk->sk_state_change(sk); | |
839 | ||
840 | sock_set_flag(sk, SOCK_ZAPPED); | |
841 | } | |
842 | ||
843 | static void sco_conn_ready(struct sco_conn *conn) | |
844 | { | |
735cbc47 AE |
845 | struct sock *parent; |
846 | struct sock *sk = conn->sk; | |
1da177e4 LT |
847 | |
848 | BT_DBG("conn %p", conn); | |
849 | ||
850 | sco_conn_lock(conn); | |
851 | ||
735cbc47 | 852 | if (sk) { |
1da177e4 LT |
853 | sco_sock_clear_timer(sk); |
854 | bh_lock_sock(sk); | |
855 | sk->sk_state = BT_CONNECTED; | |
856 | sk->sk_state_change(sk); | |
857 | bh_unlock_sock(sk); | |
858 | } else { | |
859 | parent = sco_get_sock_listen(conn->src); | |
860 | if (!parent) | |
861 | goto done; | |
862 | ||
863 | bh_lock_sock(parent); | |
864 | ||
b9dbdbc1 GP |
865 | sk = sco_sock_alloc(sock_net(parent), NULL, |
866 | BTPROTO_SCO, GFP_ATOMIC); | |
1da177e4 LT |
867 | if (!sk) { |
868 | bh_unlock_sock(parent); | |
869 | goto done; | |
870 | } | |
871 | ||
872 | sco_sock_init(sk, parent); | |
873 | ||
874 | bacpy(&bt_sk(sk)->src, conn->src); | |
875 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
876 | ||
877 | hci_conn_hold(conn->hcon); | |
878 | __sco_chan_add(conn, sk, parent); | |
879 | ||
880 | sk->sk_state = BT_CONNECTED; | |
881 | ||
882 | /* Wake up parent */ | |
883 | parent->sk_data_ready(parent, 1); | |
884 | ||
885 | bh_unlock_sock(parent); | |
886 | } | |
887 | ||
888 | done: | |
889 | sco_conn_unlock(conn); | |
890 | } | |
891 | ||
892 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
893 | static int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type) | |
894 | { | |
71aeeaa1 MH |
895 | register struct sock *sk; |
896 | struct hlist_node *node; | |
897 | int lm = 0; | |
898 | ||
899 | if (type != SCO_LINK && type != ESCO_LINK) | |
c89ad737 | 900 | return -EINVAL; |
71aeeaa1 | 901 | |
1da177e4 LT |
902 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
903 | ||
71aeeaa1 MH |
904 | /* Find listening sockets */ |
905 | read_lock(&sco_sk_list.lock); | |
906 | sk_for_each(sk, node, &sco_sk_list.head) { | |
907 | if (sk->sk_state != BT_LISTEN) | |
908 | continue; | |
909 | ||
910 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || | |
911 | !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { | |
912 | lm |= HCI_LM_ACCEPT; | |
913 | break; | |
914 | } | |
915 | } | |
916 | read_unlock(&sco_sk_list.lock); | |
917 | ||
918 | return lm; | |
1da177e4 LT |
919 | } |
920 | ||
921 | static int sco_connect_cfm(struct hci_conn *hcon, __u8 status) | |
922 | { | |
923 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
924 | ||
b6a0dc82 | 925 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
c89ad737 | 926 | return -EINVAL; |
1da177e4 LT |
927 | |
928 | if (!status) { | |
929 | struct sco_conn *conn; | |
930 | ||
931 | conn = sco_conn_add(hcon, status); | |
932 | if (conn) | |
933 | sco_conn_ready(conn); | |
8e87d142 | 934 | } else |
e175072f | 935 | sco_conn_del(hcon, bt_to_errno(status)); |
1da177e4 LT |
936 | |
937 | return 0; | |
938 | } | |
939 | ||
2950f21a | 940 | static int sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
1da177e4 LT |
941 | { |
942 | BT_DBG("hcon %p reason %d", hcon, reason); | |
943 | ||
b6a0dc82 | 944 | if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) |
c89ad737 | 945 | return -EINVAL; |
1da177e4 | 946 | |
e175072f | 947 | sco_conn_del(hcon, bt_to_errno(reason)); |
b6a0dc82 | 948 | |
1da177e4 LT |
949 | return 0; |
950 | } | |
951 | ||
952 | static int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) | |
953 | { | |
954 | struct sco_conn *conn = hcon->sco_data; | |
955 | ||
956 | if (!conn) | |
957 | goto drop; | |
958 | ||
959 | BT_DBG("conn %p len %d", conn, skb->len); | |
960 | ||
961 | if (skb->len) { | |
962 | sco_recv_frame(conn, skb); | |
963 | return 0; | |
964 | } | |
965 | ||
966 | drop: | |
8e87d142 | 967 | kfree_skb(skb); |
1da177e4 LT |
968 | return 0; |
969 | } | |
970 | ||
aef7d97c | 971 | static int sco_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
972 | { |
973 | struct sock *sk; | |
974 | struct hlist_node *node; | |
1da177e4 LT |
975 | |
976 | read_lock_bh(&sco_sk_list.lock); | |
977 | ||
be9d1227 | 978 | sk_for_each(sk, node, &sco_sk_list.head) { |
aef7d97c MH |
979 | seq_printf(f, "%s %s %d\n", batostr(&bt_sk(sk)->src), |
980 | batostr(&bt_sk(sk)->dst), sk->sk_state); | |
be9d1227 | 981 | } |
1da177e4 | 982 | |
1da177e4 | 983 | read_unlock_bh(&sco_sk_list.lock); |
1da177e4 | 984 | |
aef7d97c | 985 | return 0; |
1da177e4 LT |
986 | } |
987 | ||
aef7d97c MH |
988 | static int sco_debugfs_open(struct inode *inode, struct file *file) |
989 | { | |
990 | return single_open(file, sco_debugfs_show, inode->i_private); | |
991 | } | |
992 | ||
993 | static const struct file_operations sco_debugfs_fops = { | |
994 | .open = sco_debugfs_open, | |
995 | .read = seq_read, | |
996 | .llseek = seq_lseek, | |
997 | .release = single_release, | |
998 | }; | |
999 | ||
1000 | static struct dentry *sco_debugfs; | |
1da177e4 | 1001 | |
90ddc4f0 | 1002 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
1003 | .family = PF_BLUETOOTH, |
1004 | .owner = THIS_MODULE, | |
1005 | .release = sco_sock_release, | |
1006 | .bind = sco_sock_bind, | |
1007 | .connect = sco_sock_connect, | |
1008 | .listen = sco_sock_listen, | |
1009 | .accept = sco_sock_accept, | |
1010 | .getname = sco_sock_getname, | |
1011 | .sendmsg = sco_sock_sendmsg, | |
1012 | .recvmsg = bt_sock_recvmsg, | |
1013 | .poll = bt_sock_poll, | |
3241ad82 | 1014 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
1015 | .mmap = sock_no_mmap, |
1016 | .socketpair = sock_no_socketpair, | |
fd0b3ff7 | 1017 | .shutdown = sco_sock_shutdown, |
1da177e4 LT |
1018 | .setsockopt = sco_sock_setsockopt, |
1019 | .getsockopt = sco_sock_getsockopt | |
1020 | }; | |
1021 | ||
ec1b4cf7 | 1022 | static const struct net_proto_family sco_sock_family_ops = { |
1da177e4 LT |
1023 | .family = PF_BLUETOOTH, |
1024 | .owner = THIS_MODULE, | |
1025 | .create = sco_sock_create, | |
1026 | }; | |
1027 | ||
1028 | static struct hci_proto sco_hci_proto = { | |
1029 | .name = "SCO", | |
1030 | .id = HCI_PROTO_SCO, | |
1031 | .connect_ind = sco_connect_ind, | |
1032 | .connect_cfm = sco_connect_cfm, | |
2950f21a | 1033 | .disconn_cfm = sco_disconn_cfm, |
1da177e4 LT |
1034 | .recv_scodata = sco_recv_scodata |
1035 | }; | |
1036 | ||
64274518 | 1037 | int __init sco_init(void) |
1da177e4 LT |
1038 | { |
1039 | int err; | |
1040 | ||
1041 | err = proto_register(&sco_proto, 0); | |
1042 | if (err < 0) | |
1043 | return err; | |
1044 | ||
1045 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1046 | if (err < 0) { | |
1047 | BT_ERR("SCO socket registration failed"); | |
1048 | goto error; | |
1049 | } | |
1050 | ||
1051 | err = hci_register_proto(&sco_hci_proto); | |
1052 | if (err < 0) { | |
1053 | BT_ERR("SCO protocol registration failed"); | |
1054 | bt_sock_unregister(BTPROTO_SCO); | |
1055 | goto error; | |
1056 | } | |
1057 | ||
aef7d97c MH |
1058 | if (bt_debugfs) { |
1059 | sco_debugfs = debugfs_create_file("sco", 0444, | |
1060 | bt_debugfs, NULL, &sco_debugfs_fops); | |
1061 | if (!sco_debugfs) | |
1062 | BT_ERR("Failed to create SCO debug file"); | |
1063 | } | |
1da177e4 | 1064 | |
1da177e4 LT |
1065 | BT_INFO("SCO socket layer initialized"); |
1066 | ||
1067 | return 0; | |
1068 | ||
1069 | error: | |
1070 | proto_unregister(&sco_proto); | |
1071 | return err; | |
1072 | } | |
1073 | ||
64274518 | 1074 | void __exit sco_exit(void) |
1da177e4 | 1075 | { |
aef7d97c | 1076 | debugfs_remove(sco_debugfs); |
1da177e4 LT |
1077 | |
1078 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1079 | BT_ERR("SCO socket unregistration failed"); | |
1080 | ||
1081 | if (hci_unregister_proto(&sco_hci_proto) < 0) | |
1082 | BT_ERR("SCO protocol unregistration failed"); | |
1083 | ||
1084 | proto_unregister(&sco_proto); | |
1085 | } | |
1086 | ||
7cb127d5 MH |
1087 | module_param(disable_esco, bool, 0644); |
1088 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); |