Commit | Line | Data |
---|---|---|
8e87d142 | 1 | /* |
1da177e4 LT |
2 | BlueZ - Bluetooth protocol stack for Linux |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
4 | ||
5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation; | |
10 | ||
11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
19 | ||
8e87d142 YH |
20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
22 | SOFTWARE IS DISCLAIMED. |
23 | */ | |
24 | ||
25 | /* Bluetooth SCO sockets. */ | |
26 | ||
1da177e4 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 | ||
6039aa73 | 126 | static struct sock *sco_chan_get(struct sco_conn *conn) |
1da177e4 LT |
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 | ||
6039aa73 GP |
160 | static int sco_chan_add(struct sco_conn *conn, struct sock *sk, |
161 | struct sock *parent) | |
1da177e4 LT |
162 | { |
163 | int err = 0; | |
164 | ||
165 | sco_conn_lock(conn); | |
b9dbdbc1 | 166 | if (conn->sk) |
1da177e4 | 167 | err = -EBUSY; |
b9dbdbc1 | 168 | else |
1da177e4 | 169 | __sco_chan_add(conn, sk, parent); |
b9dbdbc1 | 170 | |
1da177e4 LT |
171 | sco_conn_unlock(conn); |
172 | return err; | |
173 | } | |
174 | ||
175 | static int sco_connect(struct sock *sk) | |
176 | { | |
177 | bdaddr_t *src = &bt_sk(sk)->src; | |
178 | bdaddr_t *dst = &bt_sk(sk)->dst; | |
179 | struct sco_conn *conn; | |
180 | struct hci_conn *hcon; | |
181 | struct hci_dev *hdev; | |
b6a0dc82 | 182 | int err, type; |
1da177e4 LT |
183 | |
184 | BT_DBG("%s -> %s", batostr(src), batostr(dst)); | |
185 | ||
735cbc47 AE |
186 | hdev = hci_get_route(dst, src); |
187 | if (!hdev) | |
1da177e4 LT |
188 | return -EHOSTUNREACH; |
189 | ||
09fd0de5 | 190 | hci_dev_lock(hdev); |
1da177e4 | 191 | |
7cb127d5 MH |
192 | if (lmp_esco_capable(hdev) && !disable_esco) |
193 | type = ESCO_LINK; | |
194 | else | |
195 | type = SCO_LINK; | |
b6a0dc82 | 196 | |
b12f62cf AG |
197 | hcon = hci_connect(hdev, type, dst, BDADDR_BREDR, BT_SECURITY_LOW, |
198 | HCI_AT_NO_BONDING); | |
30e76272 VT |
199 | if (IS_ERR(hcon)) { |
200 | err = PTR_ERR(hcon); | |
1da177e4 | 201 | goto done; |
30e76272 | 202 | } |
1da177e4 | 203 | |
519e42b3 | 204 | conn = sco_conn_add(hcon); |
1da177e4 LT |
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 | 226 | done: |
09fd0de5 | 227 | hci_dev_unlock(hdev); |
1da177e4 LT |
228 | hci_dev_put(hdev); |
229 | return err; | |
230 | } | |
231 | ||
6039aa73 | 232 | static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len) |
1da177e4 LT |
233 | { |
234 | struct sco_conn *conn = sco_pi(sk)->conn; | |
235 | struct sk_buff *skb; | |
088ce088 | 236 | int err; |
1da177e4 LT |
237 | |
238 | /* Check outgoing MTU */ | |
239 | if (len > conn->mtu) | |
240 | return -EINVAL; | |
241 | ||
242 | BT_DBG("sk %p len %d", sk, len); | |
243 | ||
088ce088 | 244 | skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err); |
b9dbdbc1 | 245 | if (!skb) |
1da177e4 LT |
246 | return err; |
247 | ||
088ce088 | 248 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { |
b9dbdbc1 GP |
249 | kfree_skb(skb); |
250 | return -EFAULT; | |
1da177e4 LT |
251 | } |
252 | ||
0d861d8b | 253 | hci_send_sco(conn->hcon, skb); |
1da177e4 | 254 | |
088ce088 | 255 | return len; |
1da177e4 LT |
256 | } |
257 | ||
6039aa73 | 258 | static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) |
1da177e4 LT |
259 | { |
260 | struct sock *sk = sco_chan_get(conn); | |
261 | ||
262 | if (!sk) | |
263 | goto drop; | |
264 | ||
265 | BT_DBG("sk %p len %d", sk, skb->len); | |
266 | ||
267 | if (sk->sk_state != BT_CONNECTED) | |
268 | goto drop; | |
269 | ||
270 | if (!sock_queue_rcv_skb(sk, skb)) | |
271 | return; | |
272 | ||
273 | drop: | |
274 | kfree_skb(skb); | |
1da177e4 LT |
275 | } |
276 | ||
277 | /* -------- Socket interface ---------- */ | |
fb334059 | 278 | static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba) |
1da177e4 | 279 | { |
1da177e4 | 280 | struct hlist_node *node; |
fb334059 MH |
281 | struct sock *sk; |
282 | ||
283 | sk_for_each(sk, node, &sco_sk_list.head) { | |
284 | if (sk->sk_state != BT_LISTEN) | |
285 | continue; | |
1da177e4 | 286 | |
1da177e4 | 287 | if (!bacmp(&bt_sk(sk)->src, ba)) |
fb334059 MH |
288 | return sk; |
289 | } | |
290 | ||
291 | return NULL; | |
1da177e4 LT |
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; | |
1da177e4 LT |
470 | int err = 0; |
471 | ||
472 | BT_DBG("sk %p %s", sk, batostr(&sa->sco_bdaddr)); | |
473 | ||
474 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
475 | return -EINVAL; | |
476 | ||
477 | lock_sock(sk); | |
478 | ||
479 | if (sk->sk_state != BT_OPEN) { | |
480 | err = -EBADFD; | |
481 | goto done; | |
482 | } | |
483 | ||
8ed21f7e MH |
484 | if (sk->sk_type != SOCK_SEQPACKET) { |
485 | err = -EINVAL; | |
486 | goto done; | |
1da177e4 LT |
487 | } |
488 | ||
8ed21f7e MH |
489 | bacpy(&bt_sk(sk)->src, &sa->sco_bdaddr); |
490 | ||
491 | sk->sk_state = BT_BOUND; | |
1da177e4 LT |
492 | |
493 | done: | |
494 | release_sock(sk); | |
495 | return err; | |
496 | } | |
497 | ||
498 | static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
499 | { | |
500 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
501 | struct sock *sk = sock->sk; | |
502 | int err = 0; | |
503 | ||
504 | ||
505 | BT_DBG("sk %p", sk); | |
506 | ||
6503d961 CG |
507 | if (alen < sizeof(struct sockaddr_sco) || |
508 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
509 | return -EINVAL; |
510 | ||
511 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) | |
512 | return -EBADFD; | |
513 | ||
514 | if (sk->sk_type != SOCK_SEQPACKET) | |
515 | return -EINVAL; | |
516 | ||
517 | lock_sock(sk); | |
518 | ||
519 | /* Set destination address and psm */ | |
520 | bacpy(&bt_sk(sk)->dst, &sa->sco_bdaddr); | |
521 | ||
735cbc47 AE |
522 | err = sco_connect(sk); |
523 | if (err) | |
1da177e4 LT |
524 | goto done; |
525 | ||
8e87d142 | 526 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
be7c2b99 | 527 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
1da177e4 LT |
528 | |
529 | done: | |
530 | release_sock(sk); | |
531 | return err; | |
532 | } | |
533 | ||
534 | static int sco_sock_listen(struct socket *sock, int backlog) | |
535 | { | |
536 | struct sock *sk = sock->sk; | |
fb334059 | 537 | bdaddr_t *src = &bt_sk(sk)->src; |
1da177e4 LT |
538 | int err = 0; |
539 | ||
540 | BT_DBG("sk %p backlog %d", sk, backlog); | |
541 | ||
542 | lock_sock(sk); | |
543 | ||
7d5d775a | 544 | if (sk->sk_state != BT_BOUND) { |
1da177e4 LT |
545 | err = -EBADFD; |
546 | goto done; | |
547 | } | |
548 | ||
7d5d775a MH |
549 | if (sk->sk_type != SOCK_SEQPACKET) { |
550 | err = -EINVAL; | |
551 | goto done; | |
552 | } | |
553 | ||
fb334059 MH |
554 | write_lock(&sco_sk_list.lock); |
555 | ||
556 | if (__sco_get_sock_listen_by_addr(src)) { | |
557 | err = -EADDRINUSE; | |
558 | goto unlock; | |
559 | } | |
560 | ||
1da177e4 LT |
561 | sk->sk_max_ack_backlog = backlog; |
562 | sk->sk_ack_backlog = 0; | |
fb334059 | 563 | |
1da177e4 LT |
564 | sk->sk_state = BT_LISTEN; |
565 | ||
fb334059 MH |
566 | unlock: |
567 | write_unlock(&sco_sk_list.lock); | |
568 | ||
1da177e4 LT |
569 | done: |
570 | release_sock(sk); | |
571 | return err; | |
572 | } | |
573 | ||
574 | static int sco_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
575 | { | |
576 | DECLARE_WAITQUEUE(wait, current); | |
577 | struct sock *sk = sock->sk, *ch; | |
578 | long timeo; | |
579 | int err = 0; | |
580 | ||
581 | lock_sock(sk); | |
582 | ||
1da177e4 LT |
583 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
584 | ||
585 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
586 | ||
587 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 588 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
552b0d3c | 589 | while (1) { |
1da177e4 | 590 | set_current_state(TASK_INTERRUPTIBLE); |
552b0d3c PH |
591 | |
592 | if (sk->sk_state != BT_LISTEN) { | |
593 | err = -EBADFD; | |
1da177e4 LT |
594 | break; |
595 | } | |
596 | ||
552b0d3c PH |
597 | ch = bt_accept_dequeue(sk, newsock); |
598 | if (ch) | |
599 | break; | |
1da177e4 | 600 | |
552b0d3c PH |
601 | if (!timeo) { |
602 | err = -EAGAIN; | |
1da177e4 LT |
603 | break; |
604 | } | |
605 | ||
606 | if (signal_pending(current)) { | |
607 | err = sock_intr_errno(timeo); | |
608 | break; | |
609 | } | |
552b0d3c PH |
610 | |
611 | release_sock(sk); | |
612 | timeo = schedule_timeout(timeo); | |
613 | lock_sock(sk); | |
1da177e4 | 614 | } |
552b0d3c | 615 | __set_current_state(TASK_RUNNING); |
aa395145 | 616 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
617 | |
618 | if (err) | |
619 | goto done; | |
620 | ||
621 | newsock->state = SS_CONNECTED; | |
622 | ||
623 | BT_DBG("new socket %p", ch); | |
624 | ||
625 | done: | |
626 | release_sock(sk); | |
627 | return err; | |
628 | } | |
629 | ||
630 | static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
631 | { | |
632 | struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; | |
633 | struct sock *sk = sock->sk; | |
634 | ||
635 | BT_DBG("sock %p, sk %p", sock, sk); | |
636 | ||
637 | addr->sa_family = AF_BLUETOOTH; | |
638 | *len = sizeof(struct sockaddr_sco); | |
639 | ||
640 | if (peer) | |
641 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->dst); | |
642 | else | |
643 | bacpy(&sa->sco_bdaddr, &bt_sk(sk)->src); | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
8e87d142 | 648 | static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
649 | struct msghdr *msg, size_t len) |
650 | { | |
651 | struct sock *sk = sock->sk; | |
b9dbdbc1 | 652 | int err; |
1da177e4 LT |
653 | |
654 | BT_DBG("sock %p, sk %p", sock, sk); | |
655 | ||
c1cbe4b7 BL |
656 | err = sock_error(sk); |
657 | if (err) | |
658 | return err; | |
1da177e4 LT |
659 | |
660 | if (msg->msg_flags & MSG_OOB) | |
661 | return -EOPNOTSUPP; | |
662 | ||
663 | lock_sock(sk); | |
664 | ||
665 | if (sk->sk_state == BT_CONNECTED) | |
666 | err = sco_send_frame(sk, msg, len); | |
667 | else | |
668 | err = -ENOTCONN; | |
669 | ||
670 | release_sock(sk); | |
671 | return err; | |
672 | } | |
673 | ||
b7058842 | 674 | static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
675 | { |
676 | struct sock *sk = sock->sk; | |
677 | int err = 0; | |
678 | ||
679 | BT_DBG("sk %p", sk); | |
680 | ||
681 | lock_sock(sk); | |
682 | ||
683 | switch (optname) { | |
684 | default: | |
685 | err = -ENOPROTOOPT; | |
686 | break; | |
687 | } | |
688 | ||
689 | release_sock(sk); | |
690 | return err; | |
691 | } | |
692 | ||
d58daf42 | 693 | static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
1da177e4 LT |
694 | { |
695 | struct sock *sk = sock->sk; | |
696 | struct sco_options opts; | |
697 | struct sco_conninfo cinfo; | |
8e87d142 | 698 | int len, err = 0; |
1da177e4 LT |
699 | |
700 | BT_DBG("sk %p", sk); | |
701 | ||
702 | if (get_user(len, optlen)) | |
703 | return -EFAULT; | |
704 | ||
705 | lock_sock(sk); | |
706 | ||
707 | switch (optname) { | |
708 | case SCO_OPTIONS: | |
709 | if (sk->sk_state != BT_CONNECTED) { | |
710 | err = -ENOTCONN; | |
711 | break; | |
712 | } | |
713 | ||
714 | opts.mtu = sco_pi(sk)->conn->mtu; | |
715 | ||
716 | BT_DBG("mtu %d", opts.mtu); | |
717 | ||
718 | len = min_t(unsigned int, len, sizeof(opts)); | |
719 | if (copy_to_user(optval, (char *)&opts, len)) | |
720 | err = -EFAULT; | |
721 | ||
722 | break; | |
723 | ||
724 | case SCO_CONNINFO: | |
725 | if (sk->sk_state != BT_CONNECTED) { | |
726 | err = -ENOTCONN; | |
727 | break; | |
728 | } | |
729 | ||
c4c896e1 | 730 | memset(&cinfo, 0, sizeof(cinfo)); |
1da177e4 LT |
731 | cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; |
732 | memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); | |
733 | ||
734 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
735 | if (copy_to_user(optval, (char *)&cinfo, len)) | |
736 | err = -EFAULT; | |
737 | ||
738 | break; | |
739 | ||
740 | default: | |
741 | err = -ENOPROTOOPT; | |
742 | break; | |
743 | } | |
744 | ||
745 | release_sock(sk); | |
746 | return err; | |
747 | } | |
748 | ||
d58daf42 MH |
749 | static int sco_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
750 | { | |
751 | struct sock *sk = sock->sk; | |
752 | int len, err = 0; | |
753 | ||
754 | BT_DBG("sk %p", sk); | |
755 | ||
756 | if (level == SOL_SCO) | |
757 | return sco_sock_getsockopt_old(sock, optname, optval, optlen); | |
758 | ||
759 | if (get_user(len, optlen)) | |
760 | return -EFAULT; | |
761 | ||
762 | lock_sock(sk); | |
763 | ||
764 | switch (optname) { | |
765 | default: | |
766 | err = -ENOPROTOOPT; | |
767 | break; | |
768 | } | |
769 | ||
770 | release_sock(sk); | |
771 | return err; | |
772 | } | |
773 | ||
fd0b3ff7 MH |
774 | static int sco_sock_shutdown(struct socket *sock, int how) |
775 | { | |
776 | struct sock *sk = sock->sk; | |
777 | int err = 0; | |
778 | ||
779 | BT_DBG("sock %p, sk %p", sock, sk); | |
780 | ||
781 | if (!sk) | |
782 | return 0; | |
783 | ||
784 | lock_sock(sk); | |
785 | if (!sk->sk_shutdown) { | |
786 | sk->sk_shutdown = SHUTDOWN_MASK; | |
787 | sco_sock_clear_timer(sk); | |
788 | __sco_sock_close(sk); | |
789 | ||
790 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
791 | err = bt_sock_wait_state(sk, BT_CLOSED, | |
be7c2b99 | 792 | sk->sk_lingertime); |
fd0b3ff7 MH |
793 | } |
794 | release_sock(sk); | |
795 | return err; | |
796 | } | |
797 | ||
1da177e4 LT |
798 | static int sco_sock_release(struct socket *sock) |
799 | { | |
800 | struct sock *sk = sock->sk; | |
801 | int err = 0; | |
802 | ||
803 | BT_DBG("sock %p, sk %p", sock, sk); | |
804 | ||
805 | if (!sk) | |
806 | return 0; | |
807 | ||
808 | sco_sock_close(sk); | |
809 | ||
810 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) { | |
811 | lock_sock(sk); | |
812 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
813 | release_sock(sk); | |
814 | } | |
815 | ||
816 | sock_orphan(sk); | |
817 | sco_sock_kill(sk); | |
818 | return err; | |
819 | } | |
820 | ||
821 | static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, struct sock *parent) | |
822 | { | |
823 | BT_DBG("conn %p", conn); | |
824 | ||
825 | sco_pi(sk)->conn = conn; | |
826 | conn->sk = sk; | |
827 | ||
828 | if (parent) | |
829 | bt_accept_enqueue(parent, sk); | |
830 | } | |
831 | ||
8e87d142 | 832 | /* Delete channel. |
1da177e4 LT |
833 | * Must be called on the locked socket. */ |
834 | static void sco_chan_del(struct sock *sk, int err) | |
835 | { | |
836 | struct sco_conn *conn; | |
837 | ||
838 | conn = sco_pi(sk)->conn; | |
839 | ||
840 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); | |
841 | ||
8e87d142 | 842 | if (conn) { |
1da177e4 LT |
843 | sco_conn_lock(conn); |
844 | conn->sk = NULL; | |
845 | sco_pi(sk)->conn = NULL; | |
846 | sco_conn_unlock(conn); | |
4a77708b LAD |
847 | |
848 | if (conn->hcon) | |
849 | hci_conn_put(conn->hcon); | |
1da177e4 LT |
850 | } |
851 | ||
852 | sk->sk_state = BT_CLOSED; | |
853 | sk->sk_err = err; | |
854 | sk->sk_state_change(sk); | |
855 | ||
856 | sock_set_flag(sk, SOCK_ZAPPED); | |
857 | } | |
858 | ||
859 | static void sco_conn_ready(struct sco_conn *conn) | |
860 | { | |
735cbc47 AE |
861 | struct sock *parent; |
862 | struct sock *sk = conn->sk; | |
1da177e4 LT |
863 | |
864 | BT_DBG("conn %p", conn); | |
865 | ||
866 | sco_conn_lock(conn); | |
867 | ||
735cbc47 | 868 | if (sk) { |
1da177e4 LT |
869 | sco_sock_clear_timer(sk); |
870 | bh_lock_sock(sk); | |
871 | sk->sk_state = BT_CONNECTED; | |
872 | sk->sk_state_change(sk); | |
873 | bh_unlock_sock(sk); | |
874 | } else { | |
875 | parent = sco_get_sock_listen(conn->src); | |
876 | if (!parent) | |
877 | goto done; | |
878 | ||
879 | bh_lock_sock(parent); | |
880 | ||
b9dbdbc1 | 881 | sk = sco_sock_alloc(sock_net(parent), NULL, |
be7c2b99 | 882 | BTPROTO_SCO, GFP_ATOMIC); |
1da177e4 LT |
883 | if (!sk) { |
884 | bh_unlock_sock(parent); | |
885 | goto done; | |
886 | } | |
887 | ||
888 | sco_sock_init(sk, parent); | |
889 | ||
890 | bacpy(&bt_sk(sk)->src, conn->src); | |
891 | bacpy(&bt_sk(sk)->dst, conn->dst); | |
892 | ||
893 | hci_conn_hold(conn->hcon); | |
894 | __sco_chan_add(conn, sk, parent); | |
895 | ||
896 | sk->sk_state = BT_CONNECTED; | |
897 | ||
898 | /* Wake up parent */ | |
899 | parent->sk_data_ready(parent, 1); | |
900 | ||
901 | bh_unlock_sock(parent); | |
902 | } | |
903 | ||
904 | done: | |
905 | sco_conn_unlock(conn); | |
906 | } | |
907 | ||
908 | /* ----- SCO interface with lower layer (HCI) ----- */ | |
686ebf28 | 909 | int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr) |
1da177e4 | 910 | { |
71aeeaa1 MH |
911 | register struct sock *sk; |
912 | struct hlist_node *node; | |
913 | int lm = 0; | |
914 | ||
1da177e4 LT |
915 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
916 | ||
71aeeaa1 MH |
917 | /* Find listening sockets */ |
918 | read_lock(&sco_sk_list.lock); | |
919 | sk_for_each(sk, node, &sco_sk_list.head) { | |
920 | if (sk->sk_state != BT_LISTEN) | |
921 | continue; | |
922 | ||
923 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr) || | |
be7c2b99 | 924 | !bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
71aeeaa1 MH |
925 | lm |= HCI_LM_ACCEPT; |
926 | break; | |
927 | } | |
928 | } | |
929 | read_unlock(&sco_sk_list.lock); | |
930 | ||
931 | return lm; | |
1da177e4 LT |
932 | } |
933 | ||
686ebf28 | 934 | int sco_connect_cfm(struct hci_conn *hcon, __u8 status) |
1da177e4 LT |
935 | { |
936 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); | |
1da177e4 LT |
937 | if (!status) { |
938 | struct sco_conn *conn; | |
939 | ||
519e42b3 | 940 | conn = sco_conn_add(hcon); |
1da177e4 LT |
941 | if (conn) |
942 | sco_conn_ready(conn); | |
8e87d142 | 943 | } else |
e175072f | 944 | sco_conn_del(hcon, bt_to_errno(status)); |
1da177e4 LT |
945 | |
946 | return 0; | |
947 | } | |
948 | ||
686ebf28 | 949 | int sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) |
1da177e4 LT |
950 | { |
951 | BT_DBG("hcon %p reason %d", hcon, reason); | |
952 | ||
e175072f | 953 | sco_conn_del(hcon, bt_to_errno(reason)); |
1da177e4 LT |
954 | return 0; |
955 | } | |
956 | ||
686ebf28 | 957 | int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) |
1da177e4 LT |
958 | { |
959 | struct sco_conn *conn = hcon->sco_data; | |
960 | ||
961 | if (!conn) | |
962 | goto drop; | |
963 | ||
964 | BT_DBG("conn %p len %d", conn, skb->len); | |
965 | ||
966 | if (skb->len) { | |
967 | sco_recv_frame(conn, skb); | |
968 | return 0; | |
969 | } | |
970 | ||
971 | drop: | |
8e87d142 | 972 | kfree_skb(skb); |
1da177e4 LT |
973 | return 0; |
974 | } | |
975 | ||
aef7d97c | 976 | static int sco_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
977 | { |
978 | struct sock *sk; | |
979 | struct hlist_node *node; | |
1da177e4 | 980 | |
ee65d19e | 981 | read_lock(&sco_sk_list.lock); |
1da177e4 | 982 | |
be9d1227 | 983 | sk_for_each(sk, node, &sco_sk_list.head) { |
aef7d97c | 984 | seq_printf(f, "%s %s %d\n", batostr(&bt_sk(sk)->src), |
be7c2b99 | 985 | batostr(&bt_sk(sk)->dst), sk->sk_state); |
be9d1227 | 986 | } |
1da177e4 | 987 | |
ee65d19e | 988 | read_unlock(&sco_sk_list.lock); |
1da177e4 | 989 | |
aef7d97c | 990 | return 0; |
1da177e4 LT |
991 | } |
992 | ||
aef7d97c MH |
993 | static int sco_debugfs_open(struct inode *inode, struct file *file) |
994 | { | |
995 | return single_open(file, sco_debugfs_show, inode->i_private); | |
996 | } | |
997 | ||
998 | static const struct file_operations sco_debugfs_fops = { | |
999 | .open = sco_debugfs_open, | |
1000 | .read = seq_read, | |
1001 | .llseek = seq_lseek, | |
1002 | .release = single_release, | |
1003 | }; | |
1004 | ||
1005 | static struct dentry *sco_debugfs; | |
1da177e4 | 1006 | |
90ddc4f0 | 1007 | static const struct proto_ops sco_sock_ops = { |
1da177e4 LT |
1008 | .family = PF_BLUETOOTH, |
1009 | .owner = THIS_MODULE, | |
1010 | .release = sco_sock_release, | |
1011 | .bind = sco_sock_bind, | |
1012 | .connect = sco_sock_connect, | |
1013 | .listen = sco_sock_listen, | |
1014 | .accept = sco_sock_accept, | |
1015 | .getname = sco_sock_getname, | |
1016 | .sendmsg = sco_sock_sendmsg, | |
1017 | .recvmsg = bt_sock_recvmsg, | |
1018 | .poll = bt_sock_poll, | |
3241ad82 | 1019 | .ioctl = bt_sock_ioctl, |
1da177e4 LT |
1020 | .mmap = sock_no_mmap, |
1021 | .socketpair = sock_no_socketpair, | |
fd0b3ff7 | 1022 | .shutdown = sco_sock_shutdown, |
1da177e4 LT |
1023 | .setsockopt = sco_sock_setsockopt, |
1024 | .getsockopt = sco_sock_getsockopt | |
1025 | }; | |
1026 | ||
ec1b4cf7 | 1027 | static const struct net_proto_family sco_sock_family_ops = { |
1da177e4 LT |
1028 | .family = PF_BLUETOOTH, |
1029 | .owner = THIS_MODULE, | |
1030 | .create = sco_sock_create, | |
1031 | }; | |
1032 | ||
64274518 | 1033 | int __init sco_init(void) |
1da177e4 LT |
1034 | { |
1035 | int err; | |
1036 | ||
1037 | err = proto_register(&sco_proto, 0); | |
1038 | if (err < 0) | |
1039 | return err; | |
1040 | ||
1041 | err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); | |
1042 | if (err < 0) { | |
1043 | BT_ERR("SCO socket registration failed"); | |
1044 | goto error; | |
1045 | } | |
1046 | ||
aef7d97c | 1047 | if (bt_debugfs) { |
be7c2b99 GP |
1048 | sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs, |
1049 | NULL, &sco_debugfs_fops); | |
aef7d97c MH |
1050 | if (!sco_debugfs) |
1051 | BT_ERR("Failed to create SCO debug file"); | |
1052 | } | |
1da177e4 | 1053 | |
1da177e4 LT |
1054 | BT_INFO("SCO socket layer initialized"); |
1055 | ||
1056 | return 0; | |
1057 | ||
1058 | error: | |
1059 | proto_unregister(&sco_proto); | |
1060 | return err; | |
1061 | } | |
1062 | ||
64274518 | 1063 | void __exit sco_exit(void) |
1da177e4 | 1064 | { |
aef7d97c | 1065 | debugfs_remove(sco_debugfs); |
1da177e4 LT |
1066 | |
1067 | if (bt_sock_unregister(BTPROTO_SCO) < 0) | |
1068 | BT_ERR("SCO socket unregistration failed"); | |
1069 | ||
1da177e4 LT |
1070 | proto_unregister(&sco_proto); |
1071 | } | |
1072 | ||
7cb127d5 MH |
1073 | module_param(disable_esco, bool, 0644); |
1074 | MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); |