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Commit | Line | Data |
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8e87d142 | 1 | /* |
1da177e4 LT |
2 | RFCOMM implementation for Linux Bluetooth stack (BlueZ). |
3 | Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> | |
4 | Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org> | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License version 2 as | |
8 | published by the Free Software Foundation; | |
9 | ||
10 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
11 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
12 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
13 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
8e87d142 YH |
14 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
15 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
1da177e4 LT |
17 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
18 | ||
8e87d142 YH |
19 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
20 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
1da177e4 LT |
21 | SOFTWARE IS DISCLAIMED. |
22 | */ | |
23 | ||
24 | /* | |
25 | * RFCOMM sockets. | |
1da177e4 LT |
26 | */ |
27 | ||
1da177e4 LT |
28 | #include <linux/module.h> |
29 | ||
30 | #include <linux/types.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/kernel.h> | |
1da177e4 LT |
33 | #include <linux/sched.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/fcntl.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/socket.h> | |
40 | #include <linux/skbuff.h> | |
41 | #include <linux/list.h> | |
be9d1227 | 42 | #include <linux/device.h> |
aef7d97c MH |
43 | #include <linux/debugfs.h> |
44 | #include <linux/seq_file.h> | |
1da177e4 LT |
45 | #include <net/sock.h> |
46 | ||
47 | #include <asm/system.h> | |
48 | #include <asm/uaccess.h> | |
49 | ||
50 | #include <net/bluetooth/bluetooth.h> | |
51 | #include <net/bluetooth/hci_core.h> | |
52 | #include <net/bluetooth/l2cap.h> | |
53 | #include <net/bluetooth/rfcomm.h> | |
54 | ||
90ddc4f0 | 55 | static const struct proto_ops rfcomm_sock_ops; |
1da177e4 LT |
56 | |
57 | static struct bt_sock_list rfcomm_sk_list = { | |
d5fb2962 | 58 | .lock = __RW_LOCK_UNLOCKED(rfcomm_sk_list.lock) |
1da177e4 LT |
59 | }; |
60 | ||
61 | static void rfcomm_sock_close(struct sock *sk); | |
62 | static void rfcomm_sock_kill(struct sock *sk); | |
63 | ||
64 | /* ---- DLC callbacks ---- | |
65 | * | |
66 | * called under rfcomm_dlc_lock() | |
67 | */ | |
68 | static void rfcomm_sk_data_ready(struct rfcomm_dlc *d, struct sk_buff *skb) | |
69 | { | |
70 | struct sock *sk = d->owner; | |
71 | if (!sk) | |
72 | return; | |
73 | ||
74 | atomic_add(skb->len, &sk->sk_rmem_alloc); | |
75 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
76 | sk->sk_data_ready(sk, skb->len); | |
77 | ||
78 | if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf) | |
79 | rfcomm_dlc_throttle(d); | |
80 | } | |
81 | ||
82 | static void rfcomm_sk_state_change(struct rfcomm_dlc *d, int err) | |
83 | { | |
84 | struct sock *sk = d->owner, *parent; | |
85 | if (!sk) | |
86 | return; | |
87 | ||
88 | BT_DBG("dlc %p state %ld err %d", d, d->state, err); | |
89 | ||
90 | bh_lock_sock(sk); | |
91 | ||
92 | if (err) | |
93 | sk->sk_err = err; | |
94 | ||
95 | sk->sk_state = d->state; | |
96 | ||
97 | parent = bt_sk(sk)->parent; | |
98 | if (parent) { | |
99 | if (d->state == BT_CLOSED) { | |
100 | sock_set_flag(sk, SOCK_ZAPPED); | |
101 | bt_accept_unlink(sk); | |
102 | } | |
103 | parent->sk_data_ready(parent, 0); | |
104 | } else { | |
105 | if (d->state == BT_CONNECTED) | |
106 | rfcomm_session_getaddr(d->session, &bt_sk(sk)->src, NULL); | |
107 | sk->sk_state_change(sk); | |
108 | } | |
109 | ||
110 | bh_unlock_sock(sk); | |
111 | ||
112 | if (parent && sock_flag(sk, SOCK_ZAPPED)) { | |
113 | /* We have to drop DLC lock here, otherwise | |
114 | * rfcomm_sock_destruct() will dead lock. */ | |
115 | rfcomm_dlc_unlock(d); | |
116 | rfcomm_sock_kill(sk); | |
117 | rfcomm_dlc_lock(d); | |
118 | } | |
119 | } | |
120 | ||
121 | /* ---- Socket functions ---- */ | |
122 | static struct sock *__rfcomm_get_sock_by_addr(u8 channel, bdaddr_t *src) | |
123 | { | |
124 | struct sock *sk = NULL; | |
125 | struct hlist_node *node; | |
126 | ||
127 | sk_for_each(sk, node, &rfcomm_sk_list.head) { | |
8e87d142 | 128 | if (rfcomm_pi(sk)->channel == channel && |
1da177e4 LT |
129 | !bacmp(&bt_sk(sk)->src, src)) |
130 | break; | |
131 | } | |
132 | ||
133 | return node ? sk : NULL; | |
134 | } | |
135 | ||
136 | /* Find socket with channel and source bdaddr. | |
137 | * Returns closest match. | |
138 | */ | |
139 | static struct sock *__rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src) | |
140 | { | |
141 | struct sock *sk = NULL, *sk1 = NULL; | |
142 | struct hlist_node *node; | |
143 | ||
144 | sk_for_each(sk, node, &rfcomm_sk_list.head) { | |
145 | if (state && sk->sk_state != state) | |
146 | continue; | |
147 | ||
148 | if (rfcomm_pi(sk)->channel == channel) { | |
149 | /* Exact match. */ | |
150 | if (!bacmp(&bt_sk(sk)->src, src)) | |
151 | break; | |
152 | ||
153 | /* Closest match */ | |
154 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) | |
155 | sk1 = sk; | |
156 | } | |
157 | } | |
158 | return node ? sk : sk1; | |
159 | } | |
160 | ||
161 | /* Find socket with given address (channel, src). | |
162 | * Returns locked socket */ | |
163 | static inline struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src) | |
164 | { | |
165 | struct sock *s; | |
166 | read_lock(&rfcomm_sk_list.lock); | |
167 | s = __rfcomm_get_sock_by_channel(state, channel, src); | |
168 | if (s) bh_lock_sock(s); | |
169 | read_unlock(&rfcomm_sk_list.lock); | |
170 | return s; | |
171 | } | |
172 | ||
173 | static void rfcomm_sock_destruct(struct sock *sk) | |
174 | { | |
175 | struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; | |
176 | ||
177 | BT_DBG("sk %p dlc %p", sk, d); | |
178 | ||
179 | skb_queue_purge(&sk->sk_receive_queue); | |
180 | skb_queue_purge(&sk->sk_write_queue); | |
181 | ||
182 | rfcomm_dlc_lock(d); | |
183 | rfcomm_pi(sk)->dlc = NULL; | |
184 | ||
185 | /* Detach DLC if it's owned by this socket */ | |
186 | if (d->owner == sk) | |
187 | d->owner = NULL; | |
188 | rfcomm_dlc_unlock(d); | |
189 | ||
190 | rfcomm_dlc_put(d); | |
191 | } | |
192 | ||
193 | static void rfcomm_sock_cleanup_listen(struct sock *parent) | |
194 | { | |
195 | struct sock *sk; | |
196 | ||
197 | BT_DBG("parent %p", parent); | |
198 | ||
199 | /* Close not yet accepted dlcs */ | |
200 | while ((sk = bt_accept_dequeue(parent, NULL))) { | |
201 | rfcomm_sock_close(sk); | |
202 | rfcomm_sock_kill(sk); | |
203 | } | |
204 | ||
205 | parent->sk_state = BT_CLOSED; | |
206 | sock_set_flag(parent, SOCK_ZAPPED); | |
207 | } | |
208 | ||
209 | /* Kill socket (only if zapped and orphan) | |
210 | * Must be called on unlocked socket. | |
211 | */ | |
212 | static void rfcomm_sock_kill(struct sock *sk) | |
213 | { | |
214 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) | |
215 | return; | |
216 | ||
217 | BT_DBG("sk %p state %d refcnt %d", sk, sk->sk_state, atomic_read(&sk->sk_refcnt)); | |
218 | ||
219 | /* Kill poor orphan */ | |
220 | bt_sock_unlink(&rfcomm_sk_list, sk); | |
221 | sock_set_flag(sk, SOCK_DEAD); | |
222 | sock_put(sk); | |
223 | } | |
224 | ||
225 | static void __rfcomm_sock_close(struct sock *sk) | |
226 | { | |
227 | struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; | |
228 | ||
229 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); | |
230 | ||
231 | switch (sk->sk_state) { | |
232 | case BT_LISTEN: | |
233 | rfcomm_sock_cleanup_listen(sk); | |
234 | break; | |
235 | ||
236 | case BT_CONNECT: | |
237 | case BT_CONNECT2: | |
238 | case BT_CONFIG: | |
239 | case BT_CONNECTED: | |
240 | rfcomm_dlc_close(d, 0); | |
241 | ||
242 | default: | |
243 | sock_set_flag(sk, SOCK_ZAPPED); | |
244 | break; | |
245 | } | |
246 | } | |
247 | ||
248 | /* Close socket. | |
249 | * Must be called on unlocked socket. | |
250 | */ | |
251 | static void rfcomm_sock_close(struct sock *sk) | |
252 | { | |
253 | lock_sock(sk); | |
254 | __rfcomm_sock_close(sk); | |
255 | release_sock(sk); | |
256 | } | |
257 | ||
258 | static void rfcomm_sock_init(struct sock *sk, struct sock *parent) | |
259 | { | |
260 | struct rfcomm_pinfo *pi = rfcomm_pi(sk); | |
261 | ||
262 | BT_DBG("sk %p", sk); | |
263 | ||
264 | if (parent) { | |
265 | sk->sk_type = parent->sk_type; | |
bb23c0ab | 266 | pi->dlc->defer_setup = bt_sk(parent)->defer_setup; |
9f2c8a03 MH |
267 | |
268 | pi->sec_level = rfcomm_pi(parent)->sec_level; | |
269 | pi->role_switch = rfcomm_pi(parent)->role_switch; | |
1da177e4 | 270 | } else { |
bb23c0ab | 271 | pi->dlc->defer_setup = 0; |
9f2c8a03 MH |
272 | |
273 | pi->sec_level = BT_SECURITY_LOW; | |
274 | pi->role_switch = 0; | |
1da177e4 LT |
275 | } |
276 | ||
9f2c8a03 MH |
277 | pi->dlc->sec_level = pi->sec_level; |
278 | pi->dlc->role_switch = pi->role_switch; | |
1da177e4 LT |
279 | } |
280 | ||
281 | static struct proto rfcomm_proto = { | |
282 | .name = "RFCOMM", | |
283 | .owner = THIS_MODULE, | |
284 | .obj_size = sizeof(struct rfcomm_pinfo) | |
285 | }; | |
286 | ||
1b8d7ae4 | 287 | static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
1da177e4 LT |
288 | { |
289 | struct rfcomm_dlc *d; | |
290 | struct sock *sk; | |
291 | ||
6257ff21 | 292 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &rfcomm_proto); |
1da177e4 LT |
293 | if (!sk) |
294 | return NULL; | |
295 | ||
296 | sock_init_data(sock, sk); | |
297 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); | |
298 | ||
299 | d = rfcomm_dlc_alloc(prio); | |
300 | if (!d) { | |
301 | sk_free(sk); | |
302 | return NULL; | |
303 | } | |
304 | ||
305 | d->data_ready = rfcomm_sk_data_ready; | |
306 | d->state_change = rfcomm_sk_state_change; | |
307 | ||
308 | rfcomm_pi(sk)->dlc = d; | |
309 | d->owner = sk; | |
310 | ||
311 | sk->sk_destruct = rfcomm_sock_destruct; | |
312 | sk->sk_sndtimeo = RFCOMM_CONN_TIMEOUT; | |
313 | ||
77db1980 MH |
314 | sk->sk_sndbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10; |
315 | sk->sk_rcvbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10; | |
1da177e4 LT |
316 | |
317 | sock_reset_flag(sk, SOCK_ZAPPED); | |
318 | ||
319 | sk->sk_protocol = proto; | |
77db1980 | 320 | sk->sk_state = BT_OPEN; |
1da177e4 LT |
321 | |
322 | bt_sock_link(&rfcomm_sk_list, sk); | |
323 | ||
324 | BT_DBG("sk %p", sk); | |
325 | return sk; | |
326 | } | |
327 | ||
3f378b68 EP |
328 | static int rfcomm_sock_create(struct net *net, struct socket *sock, |
329 | int protocol, int kern) | |
1da177e4 LT |
330 | { |
331 | struct sock *sk; | |
332 | ||
333 | BT_DBG("sock %p", sock); | |
334 | ||
335 | sock->state = SS_UNCONNECTED; | |
336 | ||
337 | if (sock->type != SOCK_STREAM && sock->type != SOCK_RAW) | |
338 | return -ESOCKTNOSUPPORT; | |
339 | ||
340 | sock->ops = &rfcomm_sock_ops; | |
341 | ||
1b8d7ae4 | 342 | sk = rfcomm_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
74da626a | 343 | if (!sk) |
1da177e4 LT |
344 | return -ENOMEM; |
345 | ||
346 | rfcomm_sock_init(sk, NULL); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) | |
351 | { | |
352 | struct sockaddr_rc *sa = (struct sockaddr_rc *) addr; | |
353 | struct sock *sk = sock->sk; | |
354 | int err = 0; | |
355 | ||
356 | BT_DBG("sk %p %s", sk, batostr(&sa->rc_bdaddr)); | |
357 | ||
358 | if (!addr || addr->sa_family != AF_BLUETOOTH) | |
359 | return -EINVAL; | |
360 | ||
361 | lock_sock(sk); | |
362 | ||
363 | if (sk->sk_state != BT_OPEN) { | |
364 | err = -EBADFD; | |
365 | goto done; | |
366 | } | |
367 | ||
354d28d5 MH |
368 | if (sk->sk_type != SOCK_STREAM) { |
369 | err = -EINVAL; | |
370 | goto done; | |
371 | } | |
372 | ||
1da177e4 LT |
373 | write_lock_bh(&rfcomm_sk_list.lock); |
374 | ||
375 | if (sa->rc_channel && __rfcomm_get_sock_by_addr(sa->rc_channel, &sa->rc_bdaddr)) { | |
376 | err = -EADDRINUSE; | |
377 | } else { | |
378 | /* Save source address */ | |
379 | bacpy(&bt_sk(sk)->src, &sa->rc_bdaddr); | |
380 | rfcomm_pi(sk)->channel = sa->rc_channel; | |
381 | sk->sk_state = BT_BOUND; | |
382 | } | |
383 | ||
384 | write_unlock_bh(&rfcomm_sk_list.lock); | |
385 | ||
386 | done: | |
387 | release_sock(sk); | |
388 | return err; | |
389 | } | |
390 | ||
391 | static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) | |
392 | { | |
393 | struct sockaddr_rc *sa = (struct sockaddr_rc *) addr; | |
394 | struct sock *sk = sock->sk; | |
395 | struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; | |
396 | int err = 0; | |
397 | ||
398 | BT_DBG("sk %p", sk); | |
399 | ||
6503d961 CG |
400 | if (alen < sizeof(struct sockaddr_rc) || |
401 | addr->sa_family != AF_BLUETOOTH) | |
1da177e4 LT |
402 | return -EINVAL; |
403 | ||
354d28d5 | 404 | lock_sock(sk); |
1da177e4 | 405 | |
354d28d5 MH |
406 | if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) { |
407 | err = -EBADFD; | |
408 | goto done; | |
409 | } | |
1da177e4 | 410 | |
354d28d5 MH |
411 | if (sk->sk_type != SOCK_STREAM) { |
412 | err = -EINVAL; | |
413 | goto done; | |
414 | } | |
1da177e4 LT |
415 | |
416 | sk->sk_state = BT_CONNECT; | |
417 | bacpy(&bt_sk(sk)->dst, &sa->rc_bdaddr); | |
418 | rfcomm_pi(sk)->channel = sa->rc_channel; | |
419 | ||
9f2c8a03 MH |
420 | d->sec_level = rfcomm_pi(sk)->sec_level; |
421 | d->role_switch = rfcomm_pi(sk)->role_switch; | |
77db1980 | 422 | |
1da177e4 LT |
423 | err = rfcomm_dlc_open(d, &bt_sk(sk)->src, &sa->rc_bdaddr, sa->rc_channel); |
424 | if (!err) | |
425 | err = bt_sock_wait_state(sk, BT_CONNECTED, | |
426 | sock_sndtimeo(sk, flags & O_NONBLOCK)); | |
427 | ||
354d28d5 | 428 | done: |
1da177e4 LT |
429 | release_sock(sk); |
430 | return err; | |
431 | } | |
432 | ||
433 | static int rfcomm_sock_listen(struct socket *sock, int backlog) | |
434 | { | |
435 | struct sock *sk = sock->sk; | |
436 | int err = 0; | |
437 | ||
438 | BT_DBG("sk %p backlog %d", sk, backlog); | |
439 | ||
440 | lock_sock(sk); | |
441 | ||
442 | if (sk->sk_state != BT_BOUND) { | |
443 | err = -EBADFD; | |
444 | goto done; | |
445 | } | |
446 | ||
354d28d5 MH |
447 | if (sk->sk_type != SOCK_STREAM) { |
448 | err = -EINVAL; | |
449 | goto done; | |
450 | } | |
451 | ||
1da177e4 LT |
452 | if (!rfcomm_pi(sk)->channel) { |
453 | bdaddr_t *src = &bt_sk(sk)->src; | |
454 | u8 channel; | |
455 | ||
456 | err = -EINVAL; | |
457 | ||
458 | write_lock_bh(&rfcomm_sk_list.lock); | |
459 | ||
460 | for (channel = 1; channel < 31; channel++) | |
461 | if (!__rfcomm_get_sock_by_addr(channel, src)) { | |
462 | rfcomm_pi(sk)->channel = channel; | |
463 | err = 0; | |
464 | break; | |
465 | } | |
466 | ||
467 | write_unlock_bh(&rfcomm_sk_list.lock); | |
468 | ||
469 | if (err < 0) | |
470 | goto done; | |
471 | } | |
472 | ||
473 | sk->sk_max_ack_backlog = backlog; | |
474 | sk->sk_ack_backlog = 0; | |
475 | sk->sk_state = BT_LISTEN; | |
476 | ||
477 | done: | |
478 | release_sock(sk); | |
479 | return err; | |
480 | } | |
481 | ||
482 | static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int flags) | |
483 | { | |
484 | DECLARE_WAITQUEUE(wait, current); | |
485 | struct sock *sk = sock->sk, *nsk; | |
486 | long timeo; | |
487 | int err = 0; | |
488 | ||
489 | lock_sock(sk); | |
490 | ||
491 | if (sk->sk_state != BT_LISTEN) { | |
492 | err = -EBADFD; | |
493 | goto done; | |
494 | } | |
495 | ||
354d28d5 MH |
496 | if (sk->sk_type != SOCK_STREAM) { |
497 | err = -EINVAL; | |
498 | goto done; | |
499 | } | |
500 | ||
1da177e4 LT |
501 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
502 | ||
503 | BT_DBG("sk %p timeo %ld", sk, timeo); | |
504 | ||
505 | /* Wait for an incoming connection. (wake-one). */ | |
aa395145 | 506 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
1da177e4 LT |
507 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { |
508 | set_current_state(TASK_INTERRUPTIBLE); | |
509 | if (!timeo) { | |
510 | err = -EAGAIN; | |
511 | break; | |
512 | } | |
513 | ||
514 | release_sock(sk); | |
515 | timeo = schedule_timeout(timeo); | |
516 | lock_sock(sk); | |
517 | ||
518 | if (sk->sk_state != BT_LISTEN) { | |
519 | err = -EBADFD; | |
520 | break; | |
521 | } | |
522 | ||
523 | if (signal_pending(current)) { | |
524 | err = sock_intr_errno(timeo); | |
525 | break; | |
526 | } | |
527 | } | |
528 | set_current_state(TASK_RUNNING); | |
aa395145 | 529 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
530 | |
531 | if (err) | |
532 | goto done; | |
533 | ||
534 | newsock->state = SS_CONNECTED; | |
535 | ||
536 | BT_DBG("new socket %p", nsk); | |
537 | ||
538 | done: | |
539 | release_sock(sk); | |
540 | return err; | |
541 | } | |
542 | ||
543 | static int rfcomm_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) | |
544 | { | |
545 | struct sockaddr_rc *sa = (struct sockaddr_rc *) addr; | |
546 | struct sock *sk = sock->sk; | |
547 | ||
548 | BT_DBG("sock %p, sk %p", sock, sk); | |
549 | ||
550 | sa->rc_family = AF_BLUETOOTH; | |
551 | sa->rc_channel = rfcomm_pi(sk)->channel; | |
552 | if (peer) | |
553 | bacpy(&sa->rc_bdaddr, &bt_sk(sk)->dst); | |
554 | else | |
555 | bacpy(&sa->rc_bdaddr, &bt_sk(sk)->src); | |
556 | ||
557 | *len = sizeof(struct sockaddr_rc); | |
558 | return 0; | |
559 | } | |
560 | ||
561 | static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock, | |
562 | struct msghdr *msg, size_t len) | |
563 | { | |
564 | struct sock *sk = sock->sk; | |
565 | struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; | |
566 | struct sk_buff *skb; | |
1da177e4 LT |
567 | int sent = 0; |
568 | ||
bb23c0ab MH |
569 | if (test_bit(RFCOMM_DEFER_SETUP, &d->flags)) |
570 | return -ENOTCONN; | |
571 | ||
1da177e4 LT |
572 | if (msg->msg_flags & MSG_OOB) |
573 | return -EOPNOTSUPP; | |
574 | ||
575 | if (sk->sk_shutdown & SEND_SHUTDOWN) | |
576 | return -EPIPE; | |
577 | ||
578 | BT_DBG("sock %p, sk %p", sock, sk); | |
579 | ||
580 | lock_sock(sk); | |
581 | ||
582 | while (len) { | |
583 | size_t size = min_t(size_t, len, d->mtu); | |
4d6a2188 | 584 | int err; |
8e87d142 | 585 | |
1da177e4 LT |
586 | skb = sock_alloc_send_skb(sk, size + RFCOMM_SKB_RESERVE, |
587 | msg->msg_flags & MSG_DONTWAIT, &err); | |
91aa35a5 VS |
588 | if (!skb) { |
589 | if (sent == 0) | |
590 | sent = err; | |
1da177e4 | 591 | break; |
91aa35a5 | 592 | } |
1da177e4 LT |
593 | skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE); |
594 | ||
595 | err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size); | |
596 | if (err) { | |
597 | kfree_skb(skb); | |
4d6a2188 MH |
598 | if (sent == 0) |
599 | sent = err; | |
1da177e4 LT |
600 | break; |
601 | } | |
602 | ||
603 | err = rfcomm_dlc_send(d, skb); | |
604 | if (err < 0) { | |
605 | kfree_skb(skb); | |
4d6a2188 MH |
606 | if (sent == 0) |
607 | sent = err; | |
1da177e4 LT |
608 | break; |
609 | } | |
610 | ||
611 | sent += size; | |
612 | len -= size; | |
613 | } | |
614 | ||
615 | release_sock(sk); | |
616 | ||
4d6a2188 | 617 | return sent; |
1da177e4 LT |
618 | } |
619 | ||
620 | static long rfcomm_sock_data_wait(struct sock *sk, long timeo) | |
621 | { | |
622 | DECLARE_WAITQUEUE(wait, current); | |
623 | ||
aa395145 | 624 | add_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
625 | for (;;) { |
626 | set_current_state(TASK_INTERRUPTIBLE); | |
627 | ||
b03efcfb DM |
628 | if (!skb_queue_empty(&sk->sk_receive_queue) || |
629 | sk->sk_err || | |
630 | (sk->sk_shutdown & RCV_SHUTDOWN) || | |
631 | signal_pending(current) || | |
632 | !timeo) | |
1da177e4 LT |
633 | break; |
634 | ||
635 | set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); | |
636 | release_sock(sk); | |
637 | timeo = schedule_timeout(timeo); | |
638 | lock_sock(sk); | |
639 | clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); | |
640 | } | |
641 | ||
642 | __set_current_state(TASK_RUNNING); | |
aa395145 | 643 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
644 | return timeo; |
645 | } | |
646 | ||
647 | static int rfcomm_sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
648 | struct msghdr *msg, size_t size, int flags) | |
649 | { | |
650 | struct sock *sk = sock->sk; | |
bb23c0ab | 651 | struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; |
1da177e4 LT |
652 | int err = 0; |
653 | size_t target, copied = 0; | |
654 | long timeo; | |
655 | ||
bb23c0ab MH |
656 | if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { |
657 | rfcomm_dlc_accept(d); | |
658 | return 0; | |
659 | } | |
660 | ||
1da177e4 LT |
661 | if (flags & MSG_OOB) |
662 | return -EOPNOTSUPP; | |
663 | ||
664 | msg->msg_namelen = 0; | |
665 | ||
a418b893 | 666 | BT_DBG("sk %p size %zu", sk, size); |
1da177e4 LT |
667 | |
668 | lock_sock(sk); | |
669 | ||
670 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, size); | |
671 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
672 | ||
673 | do { | |
674 | struct sk_buff *skb; | |
675 | int chunk; | |
676 | ||
677 | skb = skb_dequeue(&sk->sk_receive_queue); | |
678 | if (!skb) { | |
679 | if (copied >= target) | |
680 | break; | |
681 | ||
682 | if ((err = sock_error(sk)) != 0) | |
683 | break; | |
684 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
685 | break; | |
686 | ||
687 | err = -EAGAIN; | |
688 | if (!timeo) | |
689 | break; | |
690 | ||
691 | timeo = rfcomm_sock_data_wait(sk, timeo); | |
692 | ||
693 | if (signal_pending(current)) { | |
694 | err = sock_intr_errno(timeo); | |
695 | goto out; | |
696 | } | |
697 | continue; | |
698 | } | |
699 | ||
700 | chunk = min_t(unsigned int, skb->len, size); | |
701 | if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) { | |
702 | skb_queue_head(&sk->sk_receive_queue, skb); | |
703 | if (!copied) | |
704 | copied = -EFAULT; | |
705 | break; | |
706 | } | |
707 | copied += chunk; | |
708 | size -= chunk; | |
709 | ||
3b885787 | 710 | sock_recv_ts_and_drops(msg, sk, skb); |
3241ad82 | 711 | |
1da177e4 LT |
712 | if (!(flags & MSG_PEEK)) { |
713 | atomic_sub(chunk, &sk->sk_rmem_alloc); | |
714 | ||
715 | skb_pull(skb, chunk); | |
716 | if (skb->len) { | |
717 | skb_queue_head(&sk->sk_receive_queue, skb); | |
718 | break; | |
719 | } | |
720 | kfree_skb(skb); | |
721 | ||
722 | } else { | |
723 | /* put message back and return */ | |
724 | skb_queue_head(&sk->sk_receive_queue, skb); | |
725 | break; | |
726 | } | |
727 | } while (size); | |
728 | ||
729 | out: | |
730 | if (atomic_read(&sk->sk_rmem_alloc) <= (sk->sk_rcvbuf >> 2)) | |
731 | rfcomm_dlc_unthrottle(rfcomm_pi(sk)->dlc); | |
732 | ||
733 | release_sock(sk); | |
734 | return copied ? : err; | |
735 | } | |
736 | ||
b7058842 | 737 | static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
738 | { |
739 | struct sock *sk = sock->sk; | |
740 | int err = 0; | |
741 | u32 opt; | |
742 | ||
743 | BT_DBG("sk %p", sk); | |
744 | ||
745 | lock_sock(sk); | |
746 | ||
747 | switch (optname) { | |
748 | case RFCOMM_LM: | |
749 | if (get_user(opt, (u32 __user *) optval)) { | |
750 | err = -EFAULT; | |
751 | break; | |
752 | } | |
753 | ||
9f2c8a03 MH |
754 | if (opt & RFCOMM_LM_AUTH) |
755 | rfcomm_pi(sk)->sec_level = BT_SECURITY_LOW; | |
756 | if (opt & RFCOMM_LM_ENCRYPT) | |
757 | rfcomm_pi(sk)->sec_level = BT_SECURITY_MEDIUM; | |
758 | if (opt & RFCOMM_LM_SECURE) | |
759 | rfcomm_pi(sk)->sec_level = BT_SECURITY_HIGH; | |
760 | ||
761 | rfcomm_pi(sk)->role_switch = (opt & RFCOMM_LM_MASTER); | |
1da177e4 LT |
762 | break; |
763 | ||
764 | default: | |
765 | err = -ENOPROTOOPT; | |
766 | break; | |
767 | } | |
768 | ||
769 | release_sock(sk); | |
770 | return err; | |
771 | } | |
772 | ||
b7058842 | 773 | static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
d58daf42 MH |
774 | { |
775 | struct sock *sk = sock->sk; | |
9f2c8a03 MH |
776 | struct bt_security sec; |
777 | int len, err = 0; | |
bb23c0ab | 778 | u32 opt; |
d58daf42 MH |
779 | |
780 | BT_DBG("sk %p", sk); | |
781 | ||
782 | if (level == SOL_RFCOMM) | |
783 | return rfcomm_sock_setsockopt_old(sock, optname, optval, optlen); | |
784 | ||
0588d94f MH |
785 | if (level != SOL_BLUETOOTH) |
786 | return -ENOPROTOOPT; | |
787 | ||
d58daf42 MH |
788 | lock_sock(sk); |
789 | ||
790 | switch (optname) { | |
9f2c8a03 | 791 | case BT_SECURITY: |
0588d94f MH |
792 | if (sk->sk_type != SOCK_STREAM) { |
793 | err = -EINVAL; | |
794 | break; | |
795 | } | |
796 | ||
9f2c8a03 MH |
797 | sec.level = BT_SECURITY_LOW; |
798 | ||
799 | len = min_t(unsigned int, sizeof(sec), optlen); | |
800 | if (copy_from_user((char *) &sec, optval, len)) { | |
801 | err = -EFAULT; | |
802 | break; | |
803 | } | |
804 | ||
805 | if (sec.level > BT_SECURITY_HIGH) { | |
806 | err = -EINVAL; | |
807 | break; | |
808 | } | |
809 | ||
810 | rfcomm_pi(sk)->sec_level = sec.level; | |
811 | break; | |
812 | ||
bb23c0ab MH |
813 | case BT_DEFER_SETUP: |
814 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
815 | err = -EINVAL; | |
816 | break; | |
817 | } | |
818 | ||
819 | if (get_user(opt, (u32 __user *) optval)) { | |
820 | err = -EFAULT; | |
821 | break; | |
822 | } | |
823 | ||
824 | bt_sk(sk)->defer_setup = opt; | |
825 | break; | |
826 | ||
d58daf42 MH |
827 | default: |
828 | err = -ENOPROTOOPT; | |
829 | break; | |
830 | } | |
831 | ||
832 | release_sock(sk); | |
833 | return err; | |
834 | } | |
835 | ||
836 | static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) | |
1da177e4 LT |
837 | { |
838 | struct sock *sk = sock->sk; | |
839 | struct sock *l2cap_sk; | |
840 | struct rfcomm_conninfo cinfo; | |
841 | int len, err = 0; | |
9f2c8a03 | 842 | u32 opt; |
1da177e4 LT |
843 | |
844 | BT_DBG("sk %p", sk); | |
845 | ||
846 | if (get_user(len, optlen)) | |
847 | return -EFAULT; | |
848 | ||
849 | lock_sock(sk); | |
850 | ||
851 | switch (optname) { | |
852 | case RFCOMM_LM: | |
9f2c8a03 MH |
853 | switch (rfcomm_pi(sk)->sec_level) { |
854 | case BT_SECURITY_LOW: | |
855 | opt = RFCOMM_LM_AUTH; | |
856 | break; | |
857 | case BT_SECURITY_MEDIUM: | |
858 | opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT; | |
859 | break; | |
860 | case BT_SECURITY_HIGH: | |
861 | opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT | | |
862 | RFCOMM_LM_SECURE; | |
863 | break; | |
864 | default: | |
865 | opt = 0; | |
866 | break; | |
867 | } | |
868 | ||
869 | if (rfcomm_pi(sk)->role_switch) | |
870 | opt |= RFCOMM_LM_MASTER; | |
871 | ||
872 | if (put_user(opt, (u32 __user *) optval)) | |
1da177e4 LT |
873 | err = -EFAULT; |
874 | break; | |
875 | ||
876 | case RFCOMM_CONNINFO: | |
bb23c0ab MH |
877 | if (sk->sk_state != BT_CONNECTED && |
878 | !rfcomm_pi(sk)->dlc->defer_setup) { | |
1da177e4 LT |
879 | err = -ENOTCONN; |
880 | break; | |
881 | } | |
882 | ||
883 | l2cap_sk = rfcomm_pi(sk)->dlc->session->sock->sk; | |
884 | ||
885 | cinfo.hci_handle = l2cap_pi(l2cap_sk)->conn->hcon->handle; | |
886 | memcpy(cinfo.dev_class, l2cap_pi(l2cap_sk)->conn->hcon->dev_class, 3); | |
887 | ||
888 | len = min_t(unsigned int, len, sizeof(cinfo)); | |
889 | if (copy_to_user(optval, (char *) &cinfo, len)) | |
890 | err = -EFAULT; | |
891 | ||
892 | break; | |
893 | ||
894 | default: | |
895 | err = -ENOPROTOOPT; | |
896 | break; | |
897 | } | |
898 | ||
899 | release_sock(sk); | |
d58daf42 MH |
900 | return err; |
901 | } | |
902 | ||
903 | static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
904 | { | |
905 | struct sock *sk = sock->sk; | |
9f2c8a03 | 906 | struct bt_security sec; |
d58daf42 MH |
907 | int len, err = 0; |
908 | ||
909 | BT_DBG("sk %p", sk); | |
910 | ||
911 | if (level == SOL_RFCOMM) | |
912 | return rfcomm_sock_getsockopt_old(sock, optname, optval, optlen); | |
913 | ||
0588d94f MH |
914 | if (level != SOL_BLUETOOTH) |
915 | return -ENOPROTOOPT; | |
916 | ||
d58daf42 MH |
917 | if (get_user(len, optlen)) |
918 | return -EFAULT; | |
919 | ||
920 | lock_sock(sk); | |
921 | ||
922 | switch (optname) { | |
9f2c8a03 | 923 | case BT_SECURITY: |
0588d94f MH |
924 | if (sk->sk_type != SOCK_STREAM) { |
925 | err = -EINVAL; | |
926 | break; | |
927 | } | |
928 | ||
9f2c8a03 MH |
929 | sec.level = rfcomm_pi(sk)->sec_level; |
930 | ||
931 | len = min_t(unsigned int, len, sizeof(sec)); | |
932 | if (copy_to_user(optval, (char *) &sec, len)) | |
933 | err = -EFAULT; | |
934 | ||
935 | break; | |
936 | ||
bb23c0ab MH |
937 | case BT_DEFER_SETUP: |
938 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { | |
939 | err = -EINVAL; | |
940 | break; | |
941 | } | |
942 | ||
943 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) | |
944 | err = -EFAULT; | |
945 | ||
946 | break; | |
947 | ||
d58daf42 MH |
948 | default: |
949 | err = -ENOPROTOOPT; | |
950 | break; | |
951 | } | |
952 | ||
953 | release_sock(sk); | |
1da177e4 LT |
954 | return err; |
955 | } | |
956 | ||
957 | static int rfcomm_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
958 | { | |
e19caae7 | 959 | struct sock *sk __maybe_unused = sock->sk; |
1da177e4 LT |
960 | int err; |
961 | ||
e19caae7 | 962 | BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); |
1da177e4 | 963 | |
3241ad82 | 964 | err = bt_sock_ioctl(sock, cmd, arg); |
1da177e4 | 965 | |
3241ad82 | 966 | if (err == -ENOIOCTLCMD) { |
1da177e4 | 967 | #ifdef CONFIG_BT_RFCOMM_TTY |
3241ad82 MH |
968 | lock_sock(sk); |
969 | err = rfcomm_dev_ioctl(sk, cmd, (void __user *) arg); | |
970 | release_sock(sk); | |
1da177e4 | 971 | #else |
3241ad82 | 972 | err = -EOPNOTSUPP; |
1da177e4 | 973 | #endif |
3241ad82 | 974 | } |
1da177e4 | 975 | |
1da177e4 LT |
976 | return err; |
977 | } | |
978 | ||
979 | static int rfcomm_sock_shutdown(struct socket *sock, int how) | |
980 | { | |
981 | struct sock *sk = sock->sk; | |
982 | int err = 0; | |
983 | ||
984 | BT_DBG("sock %p, sk %p", sock, sk); | |
985 | ||
986 | if (!sk) return 0; | |
987 | ||
988 | lock_sock(sk); | |
989 | if (!sk->sk_shutdown) { | |
990 | sk->sk_shutdown = SHUTDOWN_MASK; | |
991 | __rfcomm_sock_close(sk); | |
992 | ||
993 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) | |
994 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); | |
995 | } | |
996 | release_sock(sk); | |
997 | return err; | |
998 | } | |
999 | ||
1000 | static int rfcomm_sock_release(struct socket *sock) | |
1001 | { | |
1002 | struct sock *sk = sock->sk; | |
1003 | int err; | |
1004 | ||
1005 | BT_DBG("sock %p, sk %p", sock, sk); | |
1006 | ||
1007 | if (!sk) | |
1008 | return 0; | |
1009 | ||
1010 | err = rfcomm_sock_shutdown(sock, 2); | |
1011 | ||
1012 | sock_orphan(sk); | |
1013 | rfcomm_sock_kill(sk); | |
1014 | return err; | |
1015 | } | |
1016 | ||
8e87d142 | 1017 | /* ---- RFCOMM core layer callbacks ---- |
1da177e4 LT |
1018 | * |
1019 | * called under rfcomm_lock() | |
1020 | */ | |
1021 | int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d) | |
1022 | { | |
1023 | struct sock *sk, *parent; | |
1024 | bdaddr_t src, dst; | |
1025 | int result = 0; | |
1026 | ||
1027 | BT_DBG("session %p channel %d", s, channel); | |
1028 | ||
1029 | rfcomm_session_getaddr(s, &src, &dst); | |
1030 | ||
1031 | /* Check if we have socket listening on channel */ | |
1032 | parent = rfcomm_get_sock_by_channel(BT_LISTEN, channel, &src); | |
1033 | if (!parent) | |
1034 | return 0; | |
1035 | ||
1036 | /* Check for backlog size */ | |
1037 | if (sk_acceptq_is_full(parent)) { | |
8e87d142 | 1038 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
1da177e4 LT |
1039 | goto done; |
1040 | } | |
1041 | ||
3b1e0a65 | 1042 | sk = rfcomm_sock_alloc(sock_net(parent), NULL, BTPROTO_RFCOMM, GFP_ATOMIC); |
1da177e4 LT |
1043 | if (!sk) |
1044 | goto done; | |
1045 | ||
1046 | rfcomm_sock_init(sk, parent); | |
1047 | bacpy(&bt_sk(sk)->src, &src); | |
1048 | bacpy(&bt_sk(sk)->dst, &dst); | |
1049 | rfcomm_pi(sk)->channel = channel; | |
1050 | ||
1051 | sk->sk_state = BT_CONFIG; | |
1052 | bt_accept_enqueue(parent, sk); | |
1053 | ||
1054 | /* Accept connection and return socket DLC */ | |
1055 | *d = rfcomm_pi(sk)->dlc; | |
1056 | result = 1; | |
1057 | ||
1058 | done: | |
1059 | bh_unlock_sock(parent); | |
bb23c0ab MH |
1060 | |
1061 | if (bt_sk(parent)->defer_setup) | |
1062 | parent->sk_state_change(parent); | |
1063 | ||
1da177e4 LT |
1064 | return result; |
1065 | } | |
1066 | ||
aef7d97c | 1067 | static int rfcomm_sock_debugfs_show(struct seq_file *f, void *p) |
1da177e4 LT |
1068 | { |
1069 | struct sock *sk; | |
1070 | struct hlist_node *node; | |
1da177e4 LT |
1071 | |
1072 | read_lock_bh(&rfcomm_sk_list.lock); | |
1073 | ||
be9d1227 | 1074 | sk_for_each(sk, node, &rfcomm_sk_list.head) { |
aef7d97c MH |
1075 | seq_printf(f, "%s %s %d %d\n", |
1076 | batostr(&bt_sk(sk)->src), | |
1077 | batostr(&bt_sk(sk)->dst), | |
be9d1227 MH |
1078 | sk->sk_state, rfcomm_pi(sk)->channel); |
1079 | } | |
1da177e4 | 1080 | |
1da177e4 | 1081 | read_unlock_bh(&rfcomm_sk_list.lock); |
1da177e4 | 1082 | |
aef7d97c | 1083 | return 0; |
1da177e4 LT |
1084 | } |
1085 | ||
aef7d97c MH |
1086 | static int rfcomm_sock_debugfs_open(struct inode *inode, struct file *file) |
1087 | { | |
1088 | return single_open(file, rfcomm_sock_debugfs_show, inode->i_private); | |
1089 | } | |
1090 | ||
1091 | static const struct file_operations rfcomm_sock_debugfs_fops = { | |
1092 | .open = rfcomm_sock_debugfs_open, | |
1093 | .read = seq_read, | |
1094 | .llseek = seq_lseek, | |
1095 | .release = single_release, | |
1096 | }; | |
1097 | ||
1098 | static struct dentry *rfcomm_sock_debugfs; | |
1da177e4 | 1099 | |
90ddc4f0 | 1100 | static const struct proto_ops rfcomm_sock_ops = { |
1da177e4 LT |
1101 | .family = PF_BLUETOOTH, |
1102 | .owner = THIS_MODULE, | |
1103 | .release = rfcomm_sock_release, | |
1104 | .bind = rfcomm_sock_bind, | |
1105 | .connect = rfcomm_sock_connect, | |
1106 | .listen = rfcomm_sock_listen, | |
1107 | .accept = rfcomm_sock_accept, | |
1108 | .getname = rfcomm_sock_getname, | |
1109 | .sendmsg = rfcomm_sock_sendmsg, | |
1110 | .recvmsg = rfcomm_sock_recvmsg, | |
1111 | .shutdown = rfcomm_sock_shutdown, | |
1112 | .setsockopt = rfcomm_sock_setsockopt, | |
1113 | .getsockopt = rfcomm_sock_getsockopt, | |
1114 | .ioctl = rfcomm_sock_ioctl, | |
1115 | .poll = bt_sock_poll, | |
1116 | .socketpair = sock_no_socketpair, | |
1117 | .mmap = sock_no_mmap | |
1118 | }; | |
1119 | ||
ec1b4cf7 | 1120 | static const struct net_proto_family rfcomm_sock_family_ops = { |
1da177e4 LT |
1121 | .family = PF_BLUETOOTH, |
1122 | .owner = THIS_MODULE, | |
1123 | .create = rfcomm_sock_create | |
1124 | }; | |
1125 | ||
be9d1227 | 1126 | int __init rfcomm_init_sockets(void) |
1da177e4 LT |
1127 | { |
1128 | int err; | |
1129 | ||
1130 | err = proto_register(&rfcomm_proto, 0); | |
1131 | if (err < 0) | |
1132 | return err; | |
1133 | ||
1134 | err = bt_sock_register(BTPROTO_RFCOMM, &rfcomm_sock_family_ops); | |
1135 | if (err < 0) | |
1136 | goto error; | |
1137 | ||
aef7d97c MH |
1138 | if (bt_debugfs) { |
1139 | rfcomm_sock_debugfs = debugfs_create_file("rfcomm", 0444, | |
1140 | bt_debugfs, NULL, &rfcomm_sock_debugfs_fops); | |
1141 | if (!rfcomm_sock_debugfs) | |
1142 | BT_ERR("Failed to create RFCOMM debug file"); | |
1143 | } | |
1da177e4 LT |
1144 | |
1145 | BT_INFO("RFCOMM socket layer initialized"); | |
1146 | ||
1147 | return 0; | |
1148 | ||
1149 | error: | |
1150 | BT_ERR("RFCOMM socket layer registration failed"); | |
1151 | proto_unregister(&rfcomm_proto); | |
1152 | return err; | |
1153 | } | |
1154 | ||
af0d3b10 | 1155 | void rfcomm_cleanup_sockets(void) |
1da177e4 | 1156 | { |
aef7d97c | 1157 | debugfs_remove(rfcomm_sock_debugfs); |
1da177e4 LT |
1158 | |
1159 | if (bt_sock_unregister(BTPROTO_RFCOMM) < 0) | |
1160 | BT_ERR("RFCOMM socket layer unregistration failed"); | |
1161 | ||
1162 | proto_unregister(&rfcomm_proto); | |
1163 | } |