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Linux-2.6.12-rc2
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / rfcomm / sock.c
CommitLineData
1da177e4
LT		 1/*
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
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
17 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18
19 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
20 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
21 SOFTWARE IS DISCLAIMED.
22*/
23
24/*
25 * RFCOMM sockets.
26 *
27 * $Id: sock.c,v 1.24 2002/10/03 01:00:34 maxk Exp $
28 */
29
30#include <linux/config.h>
31#include <linux/module.h>
32
33#include <linux/types.h>
34#include <linux/errno.h>
35#include <linux/kernel.h>
36#include <linux/major.h>
37#include <linux/sched.h>
38#include <linux/slab.h>
39#include <linux/poll.h>
40#include <linux/fcntl.h>
41#include <linux/init.h>
42#include <linux/interrupt.h>
43#include <linux/socket.h>
44#include <linux/skbuff.h>
45#include <linux/list.h>
46#include <linux/proc_fs.h>
47#include <linux/seq_file.h>
48#include <net/sock.h>
49
50#include <asm/system.h>
51#include <asm/uaccess.h>
52
53#include <net/bluetooth/bluetooth.h>
54#include <net/bluetooth/hci_core.h>
55#include <net/bluetooth/l2cap.h>
56#include <net/bluetooth/rfcomm.h>
57
58#ifndef CONFIG_BT_RFCOMM_DEBUG
59#undef BT_DBG
60#define BT_DBG(D...)
61#endif
62
63static struct proto_ops rfcomm_sock_ops;
64
65static struct bt_sock_list rfcomm_sk_list = {
66 .lock = RW_LOCK_UNLOCKED
67};
68
69static void rfcomm_sock_close(struct sock *sk);
70static void rfcomm_sock_kill(struct sock *sk);
71
72/* ---- DLC callbacks ----
73 *
74 * called under rfcomm_dlc_lock()
75 */
76static void rfcomm_sk_data_ready(struct rfcomm_dlc *d, struct sk_buff *skb)
77{
78 struct sock *sk = d->owner;
79 if (!sk)
80 return;
81
82 atomic_add(skb->len, &sk->sk_rmem_alloc);
83 skb_queue_tail(&sk->sk_receive_queue, skb);
84 sk->sk_data_ready(sk, skb->len);
85
86 if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)
87 rfcomm_dlc_throttle(d);
88}
89
90static void rfcomm_sk_state_change(struct rfcomm_dlc *d, int err)
91{
92 struct sock *sk = d->owner, *parent;
93 if (!sk)
94 return;
95
96 BT_DBG("dlc %p state %ld err %d", d, d->state, err);
97
98 bh_lock_sock(sk);
99
100 if (err)
101 sk->sk_err = err;
102
103 sk->sk_state = d->state;
104
105 parent = bt_sk(sk)->parent;
106 if (parent) {
107 if (d->state == BT_CLOSED) {
108 sock_set_flag(sk, SOCK_ZAPPED);
109 bt_accept_unlink(sk);
110 }
111 parent->sk_data_ready(parent, 0);
112 } else {
113 if (d->state == BT_CONNECTED)
114 rfcomm_session_getaddr(d->session, &bt_sk(sk)->src, NULL);
115 sk->sk_state_change(sk);
116 }
117
118 bh_unlock_sock(sk);
119
120 if (parent && sock_flag(sk, SOCK_ZAPPED)) {
121 /* We have to drop DLC lock here, otherwise
122 * rfcomm_sock_destruct() will dead lock. */
123 rfcomm_dlc_unlock(d);
124 rfcomm_sock_kill(sk);
125 rfcomm_dlc_lock(d);
126 }
127}
128
129/* ---- Socket functions ---- */
130static struct sock *__rfcomm_get_sock_by_addr(u8 channel, bdaddr_t *src)
131{
132 struct sock *sk = NULL;
133 struct hlist_node *node;
134
135 sk_for_each(sk, node, &rfcomm_sk_list.head) {
136 if (rfcomm_pi(sk)->channel == channel &&
137 !bacmp(&bt_sk(sk)->src, src))
138 break;
139 }
140
141 return node ? sk : NULL;
142}
143
144/* Find socket with channel and source bdaddr.
145 * Returns closest match.
146 */
147static struct sock *__rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
148{
149 struct sock *sk = NULL, *sk1 = NULL;
150 struct hlist_node *node;
151
152 sk_for_each(sk, node, &rfcomm_sk_list.head) {
153 if (state && sk->sk_state != state)
154 continue;
155
156 if (rfcomm_pi(sk)->channel == channel) {
157 /* Exact match. */
158 if (!bacmp(&bt_sk(sk)->src, src))
159 break;
160
161 /* Closest match */
162 if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
163 sk1 = sk;
164 }
165 }
166 return node ? sk : sk1;
167}
168
169/* Find socket with given address (channel, src).
170 * Returns locked socket */
171static inline struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
172{
173 struct sock *s;
174 read_lock(&rfcomm_sk_list.lock);
175 s = __rfcomm_get_sock_by_channel(state, channel, src);
176 if (s) bh_lock_sock(s);
177 read_unlock(&rfcomm_sk_list.lock);
178 return s;
179}
180
181static void rfcomm_sock_destruct(struct sock *sk)
182{
183 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
184
185 BT_DBG("sk %p dlc %p", sk, d);
186
187 skb_queue_purge(&sk->sk_receive_queue);
188 skb_queue_purge(&sk->sk_write_queue);
189
190 rfcomm_dlc_lock(d);
191 rfcomm_pi(sk)->dlc = NULL;
192
193 /* Detach DLC if it's owned by this socket */
194 if (d->owner == sk)
195 d->owner = NULL;
196 rfcomm_dlc_unlock(d);
197
198 rfcomm_dlc_put(d);
199}
200
201static void rfcomm_sock_cleanup_listen(struct sock *parent)
202{
203 struct sock *sk;
204
205 BT_DBG("parent %p", parent);
206
207 /* Close not yet accepted dlcs */
208 while ((sk = bt_accept_dequeue(parent, NULL))) {
209 rfcomm_sock_close(sk);
210 rfcomm_sock_kill(sk);
211 }
212
213 parent->sk_state = BT_CLOSED;
214 sock_set_flag(parent, SOCK_ZAPPED);
215}
216
217/* Kill socket (only if zapped and orphan)
218 * Must be called on unlocked socket.
219 */
220static void rfcomm_sock_kill(struct sock *sk)
221{
222 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
223 return;
224
225 BT_DBG("sk %p state %d refcnt %d", sk, sk->sk_state, atomic_read(&sk->sk_refcnt));
226
227 /* Kill poor orphan */
228 bt_sock_unlink(&rfcomm_sk_list, sk);
229 sock_set_flag(sk, SOCK_DEAD);
230 sock_put(sk);
231}
232
233static void __rfcomm_sock_close(struct sock *sk)
234{
235 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
236
237 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
238
239 switch (sk->sk_state) {
240 case BT_LISTEN:
241 rfcomm_sock_cleanup_listen(sk);
242 break;
243
244 case BT_CONNECT:
245 case BT_CONNECT2:
246 case BT_CONFIG:
247 case BT_CONNECTED:
248 rfcomm_dlc_close(d, 0);
249
250 default:
251 sock_set_flag(sk, SOCK_ZAPPED);
252 break;
253 }
254}
255
256/* Close socket.
257 * Must be called on unlocked socket.
258 */
259static void rfcomm_sock_close(struct sock *sk)
260{
261 lock_sock(sk);
262 __rfcomm_sock_close(sk);
263 release_sock(sk);
264}
265
266static void rfcomm_sock_init(struct sock *sk, struct sock *parent)
267{
268 struct rfcomm_pinfo *pi = rfcomm_pi(sk);
269
270 BT_DBG("sk %p", sk);
271
272 if (parent) {
273 sk->sk_type = parent->sk_type;
274 pi->link_mode = rfcomm_pi(parent)->link_mode;
275 } else {
276 pi->link_mode = 0;
277 }
278
279 pi->dlc->link_mode = pi->link_mode;
280}
281
282static struct proto rfcomm_proto = {
283 .name = "RFCOMM",
284 .owner = THIS_MODULE,
285 .obj_size = sizeof(struct rfcomm_pinfo)
286};
287
288static struct sock *rfcomm_sock_alloc(struct socket *sock, int proto, int prio)
289{
290 struct rfcomm_dlc *d;
291 struct sock *sk;
292
293 sk = sk_alloc(PF_BLUETOOTH, prio, &rfcomm_proto, 1);
294 if (!sk)
295 return NULL;
296
297 sock_init_data(sock, sk);
298 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
299
300 d = rfcomm_dlc_alloc(prio);
301 if (!d) {
302 sk_free(sk);
303 return NULL;
304 }
305
306 d->data_ready = rfcomm_sk_data_ready;
307 d->state_change = rfcomm_sk_state_change;
308
309 rfcomm_pi(sk)->dlc = d;
310 d->owner = sk;
311
312 sk->sk_destruct = rfcomm_sock_destruct;
313 sk->sk_sndtimeo = RFCOMM_CONN_TIMEOUT;
314
315 sk->sk_sndbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
316 sk->sk_rcvbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
317
318 sock_reset_flag(sk, SOCK_ZAPPED);
319
320 sk->sk_protocol = proto;
321 sk->sk_state = BT_OPEN;
322
323 bt_sock_link(&rfcomm_sk_list, sk);
324
325 BT_DBG("sk %p", sk);
326 return sk;
327}
328
329static int rfcomm_sock_create(struct socket *sock, int protocol)
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
342 if (!(sk = rfcomm_sock_alloc(sock, protocol, GFP_KERNEL)))
343 return -ENOMEM;
344
345 rfcomm_sock_init(sk, NULL);
346 return 0;
347}
348
349static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
350{
351 struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
352 struct sock *sk = sock->sk;
353 int err = 0;
354
355 BT_DBG("sk %p %s", sk, batostr(&sa->rc_bdaddr));
356
357 if (!addr || addr->sa_family != AF_BLUETOOTH)
358 return -EINVAL;
359
360 lock_sock(sk);
361
362 if (sk->sk_state != BT_OPEN) {
363 err = -EBADFD;
364 goto done;
365 }
366
367 write_lock_bh(&rfcomm_sk_list.lock);
368
369 if (sa->rc_channel && __rfcomm_get_sock_by_addr(sa->rc_channel, &sa->rc_bdaddr)) {
370 err = -EADDRINUSE;
371 } else {
372 /* Save source address */
373 bacpy(&bt_sk(sk)->src, &sa->rc_bdaddr);
374 rfcomm_pi(sk)->channel = sa->rc_channel;
375 sk->sk_state = BT_BOUND;
376 }
377
378 write_unlock_bh(&rfcomm_sk_list.lock);
379
380done:
381 release_sock(sk);
382 return err;
383}
384
385static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
386{
387 struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
388 struct sock *sk = sock->sk;
389 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
390 int err = 0;
391
392 BT_DBG("sk %p", sk);
393
394 if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_rc))
395 return -EINVAL;
396
397 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
398 return -EBADFD;
399
400 if (sk->sk_type != SOCK_STREAM)
401 return -EINVAL;
402
403 lock_sock(sk);
404
405 sk->sk_state = BT_CONNECT;
406 bacpy(&bt_sk(sk)->dst, &sa->rc_bdaddr);
407 rfcomm_pi(sk)->channel = sa->rc_channel;
408
409 err = rfcomm_dlc_open(d, &bt_sk(sk)->src, &sa->rc_bdaddr, sa->rc_channel);
410 if (!err)
411 err = bt_sock_wait_state(sk, BT_CONNECTED,
412 sock_sndtimeo(sk, flags & O_NONBLOCK));
413
414 release_sock(sk);
415 return err;
416}
417
418static int rfcomm_sock_listen(struct socket *sock, int backlog)
419{
420 struct sock *sk = sock->sk;
421 int err = 0;
422
423 BT_DBG("sk %p backlog %d", sk, backlog);
424
425 lock_sock(sk);
426
427 if (sk->sk_state != BT_BOUND) {
428 err = -EBADFD;
429 goto done;
430 }
431
432 if (!rfcomm_pi(sk)->channel) {
433 bdaddr_t *src = &bt_sk(sk)->src;
434 u8 channel;
435
436 err = -EINVAL;
437
438 write_lock_bh(&rfcomm_sk_list.lock);
439
440 for (channel = 1; channel < 31; channel++)
441 if (!__rfcomm_get_sock_by_addr(channel, src)) {
442 rfcomm_pi(sk)->channel = channel;
443 err = 0;
444 break;
445 }
446
447 write_unlock_bh(&rfcomm_sk_list.lock);
448
449 if (err < 0)
450 goto done;
451 }
452
453 sk->sk_max_ack_backlog = backlog;
454 sk->sk_ack_backlog = 0;
455 sk->sk_state = BT_LISTEN;
456
457done:
458 release_sock(sk);
459 return err;
460}
461
462static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int flags)
463{
464 DECLARE_WAITQUEUE(wait, current);
465 struct sock *sk = sock->sk, *nsk;
466 long timeo;
467 int err = 0;
468
469 lock_sock(sk);
470
471 if (sk->sk_state != BT_LISTEN) {
472 err = -EBADFD;
473 goto done;
474 }
475
476 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
477
478 BT_DBG("sk %p timeo %ld", sk, timeo);
479
480 /* Wait for an incoming connection. (wake-one). */
481 add_wait_queue_exclusive(sk->sk_sleep, &wait);
482 while (!(nsk = bt_accept_dequeue(sk, newsock))) {
483 set_current_state(TASK_INTERRUPTIBLE);
484 if (!timeo) {
485 err = -EAGAIN;
486 break;
487 }
488
489 release_sock(sk);
490 timeo = schedule_timeout(timeo);
491 lock_sock(sk);
492
493 if (sk->sk_state != BT_LISTEN) {
494 err = -EBADFD;
495 break;
496 }
497
498 if (signal_pending(current)) {
499 err = sock_intr_errno(timeo);
500 break;
501 }
502 }
503 set_current_state(TASK_RUNNING);
504 remove_wait_queue(sk->sk_sleep, &wait);
505
506 if (err)
507 goto done;
508
509 newsock->state = SS_CONNECTED;
510
511 BT_DBG("new socket %p", nsk);
512
513done:
514 release_sock(sk);
515 return err;
516}
517
518static int rfcomm_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
519{
520 struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
521 struct sock *sk = sock->sk;
522
523 BT_DBG("sock %p, sk %p", sock, sk);
524
525 sa->rc_family = AF_BLUETOOTH;
526 sa->rc_channel = rfcomm_pi(sk)->channel;
527 if (peer)
528 bacpy(&sa->rc_bdaddr, &bt_sk(sk)->dst);
529 else
530 bacpy(&sa->rc_bdaddr, &bt_sk(sk)->src);
531
532 *len = sizeof(struct sockaddr_rc);
533 return 0;
534}
535
536static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
537 struct msghdr *msg, size_t len)
538{
539 struct sock *sk = sock->sk;
540 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
541 struct sk_buff *skb;
542 int err;
543 int sent = 0;
544
545 if (msg->msg_flags & MSG_OOB)
546 return -EOPNOTSUPP;
547
548 if (sk->sk_shutdown & SEND_SHUTDOWN)
549 return -EPIPE;
550
551 BT_DBG("sock %p, sk %p", sock, sk);
552
553 lock_sock(sk);
554
555 while (len) {
556 size_t size = min_t(size_t, len, d->mtu);
557
558 skb = sock_alloc_send_skb(sk, size + RFCOMM_SKB_RESERVE,
559 msg->msg_flags & MSG_DONTWAIT, &err);
560 if (!skb)
561 break;
562 skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE);
563
564 err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
565 if (err) {
566 kfree_skb(skb);
567 sent = err;
568 break;
569 }
570
571 err = rfcomm_dlc_send(d, skb);
572 if (err < 0) {
573 kfree_skb(skb);
574 break;
575 }
576
577 sent += size;
578 len -= size;
579 }
580
581 release_sock(sk);
582
583 return sent ? sent : err;
584}
585
586static long rfcomm_sock_data_wait(struct sock *sk, long timeo)
587{
588 DECLARE_WAITQUEUE(wait, current);
589
590 add_wait_queue(sk->sk_sleep, &wait);
591 for (;;) {
592 set_current_state(TASK_INTERRUPTIBLE);
593
594 if (skb_queue_len(&sk->sk_receive_queue) || sk->sk_err || (sk->sk_shutdown & RCV_SHUTDOWN) ||
595 signal_pending(current) || !timeo)
596 break;
597
598 set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
599 release_sock(sk);
600 timeo = schedule_timeout(timeo);
601 lock_sock(sk);
602 clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
603 }
604
605 __set_current_state(TASK_RUNNING);
606 remove_wait_queue(sk->sk_sleep, &wait);
607 return timeo;
608}
609
610static int rfcomm_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
611 struct msghdr *msg, size_t size, int flags)
612{
613 struct sock *sk = sock->sk;
614 int err = 0;
615 size_t target, copied = 0;
616 long timeo;
617
618 if (flags & MSG_OOB)
619 return -EOPNOTSUPP;
620
621 msg->msg_namelen = 0;
622
623 BT_DBG("sk %p size %d", sk, size);
624
625 lock_sock(sk);
626
627 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
628 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
629
630 do {
631 struct sk_buff *skb;
632 int chunk;
633
634 skb = skb_dequeue(&sk->sk_receive_queue);
635 if (!skb) {
636 if (copied >= target)
637 break;
638
639 if ((err = sock_error(sk)) != 0)
640 break;
641 if (sk->sk_shutdown & RCV_SHUTDOWN)
642 break;
643
644 err = -EAGAIN;
645 if (!timeo)
646 break;
647
648 timeo = rfcomm_sock_data_wait(sk, timeo);
649
650 if (signal_pending(current)) {
651 err = sock_intr_errno(timeo);
652 goto out;
653 }
654 continue;
655 }
656
657 chunk = min_t(unsigned int, skb->len, size);
658 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
659 skb_queue_head(&sk->sk_receive_queue, skb);
660 if (!copied)
661 copied = -EFAULT;
662 break;
663 }
664 copied += chunk;
665 size -= chunk;
666
667 if (!(flags & MSG_PEEK)) {
668 atomic_sub(chunk, &sk->sk_rmem_alloc);
669
670 skb_pull(skb, chunk);
671 if (skb->len) {
672 skb_queue_head(&sk->sk_receive_queue, skb);
673 break;
674 }
675 kfree_skb(skb);
676
677 } else {
678 /* put message back and return */
679 skb_queue_head(&sk->sk_receive_queue, skb);
680 break;
681 }
682 } while (size);
683
684out:
685 if (atomic_read(&sk->sk_rmem_alloc) <= (sk->sk_rcvbuf >> 2))
686 rfcomm_dlc_unthrottle(rfcomm_pi(sk)->dlc);
687
688 release_sock(sk);
689 return copied ? : err;
690}
691
692static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
693{
694 struct sock *sk = sock->sk;
695 int err = 0;
696 u32 opt;
697
698 BT_DBG("sk %p", sk);
699
700 lock_sock(sk);
701
702 switch (optname) {
703 case RFCOMM_LM:
704 if (get_user(opt, (u32 __user *) optval)) {
705 err = -EFAULT;
706 break;
707 }
708
709 rfcomm_pi(sk)->link_mode = opt;
710 break;
711
712 default:
713 err = -ENOPROTOOPT;
714 break;
715 }
716
717 release_sock(sk);
718 return err;
719}
720
721static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
722{
723 struct sock *sk = sock->sk;
724 struct sock *l2cap_sk;
725 struct rfcomm_conninfo cinfo;
726 int len, err = 0;
727
728 BT_DBG("sk %p", sk);
729
730 if (get_user(len, optlen))
731 return -EFAULT;
732
733 lock_sock(sk);
734
735 switch (optname) {
736 case RFCOMM_LM:
737 if (put_user(rfcomm_pi(sk)->link_mode, (u32 __user *) optval))
738 err = -EFAULT;
739 break;
740
741 case RFCOMM_CONNINFO:
742 if (sk->sk_state != BT_CONNECTED) {
743 err = -ENOTCONN;
744 break;
745 }
746
747 l2cap_sk = rfcomm_pi(sk)->dlc->session->sock->sk;
748
749 cinfo.hci_handle = l2cap_pi(l2cap_sk)->conn->hcon->handle;
750 memcpy(cinfo.dev_class, l2cap_pi(l2cap_sk)->conn->hcon->dev_class, 3);
751
752 len = min_t(unsigned int, len, sizeof(cinfo));
753 if (copy_to_user(optval, (char *) &cinfo, len))
754 err = -EFAULT;
755
756 break;
757
758 default:
759 err = -ENOPROTOOPT;
760 break;
761 }
762
763 release_sock(sk);
764 return err;
765}
766
767static int rfcomm_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
768{
769 struct sock *sk = sock->sk;
770 int err;
771
772 lock_sock(sk);
773
774#ifdef CONFIG_BT_RFCOMM_TTY
775 err = rfcomm_dev_ioctl(sk, cmd, (void __user *)arg);
776#else
777 err = -EOPNOTSUPP;
778#endif
779
780 release_sock(sk);
781 return err;
782}
783
784static int rfcomm_sock_shutdown(struct socket *sock, int how)
785{
786 struct sock *sk = sock->sk;
787 int err = 0;
788
789 BT_DBG("sock %p, sk %p", sock, sk);
790
791 if (!sk) return 0;
792
793 lock_sock(sk);
794 if (!sk->sk_shutdown) {
795 sk->sk_shutdown = SHUTDOWN_MASK;
796 __rfcomm_sock_close(sk);
797
798 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
799 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
800 }
801 release_sock(sk);
802 return err;
803}
804
805static int rfcomm_sock_release(struct socket *sock)
806{
807 struct sock *sk = sock->sk;
808 int err;
809
810 BT_DBG("sock %p, sk %p", sock, sk);
811
812 if (!sk)
813 return 0;
814
815 err = rfcomm_sock_shutdown(sock, 2);
816
817 sock_orphan(sk);
818 rfcomm_sock_kill(sk);
819 return err;
820}
821
822/* ---- RFCOMM core layer callbacks ----
823 *
824 * called under rfcomm_lock()
825 */
826int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d)
827{
828 struct sock *sk, *parent;
829 bdaddr_t src, dst;
830 int result = 0;
831
832 BT_DBG("session %p channel %d", s, channel);
833
834 rfcomm_session_getaddr(s, &src, &dst);
835
836 /* Check if we have socket listening on channel */
837 parent = rfcomm_get_sock_by_channel(BT_LISTEN, channel, &src);
838 if (!parent)
839 return 0;
840
841 /* Check for backlog size */
842 if (sk_acceptq_is_full(parent)) {
843 BT_DBG("backlog full %d", parent->sk_ack_backlog);
844 goto done;
845 }
846
847 sk = rfcomm_sock_alloc(NULL, BTPROTO_RFCOMM, GFP_ATOMIC);
848 if (!sk)
849 goto done;
850
851 rfcomm_sock_init(sk, parent);
852 bacpy(&bt_sk(sk)->src, &src);
853 bacpy(&bt_sk(sk)->dst, &dst);
854 rfcomm_pi(sk)->channel = channel;
855
856 sk->sk_state = BT_CONFIG;
857 bt_accept_enqueue(parent, sk);
858
859 /* Accept connection and return socket DLC */
860 *d = rfcomm_pi(sk)->dlc;
861 result = 1;
862
863done:
864 bh_unlock_sock(parent);
865 return result;
866}
867
868/* ---- Proc fs support ---- */
869#ifdef CONFIG_PROC_FS
870static void *rfcomm_seq_start(struct seq_file *seq, loff_t *pos)
871{
872 struct sock *sk;
873 struct hlist_node *node;
874 loff_t l = *pos;
875
876 read_lock_bh(&rfcomm_sk_list.lock);
877
878 sk_for_each(sk, node, &rfcomm_sk_list.head)
879 if (!l--)
880 return sk;
881 return NULL;
882}
883
884static void *rfcomm_seq_next(struct seq_file *seq, void *e, loff_t *pos)
885{
886 struct sock *sk = e;
887 (*pos)++;
888 return sk_next(sk);
889}
890
891static void rfcomm_seq_stop(struct seq_file *seq, void *e)
892{
893 read_unlock_bh(&rfcomm_sk_list.lock);
894}
895
896static int rfcomm_seq_show(struct seq_file *seq, void *e)
897{
898 struct sock *sk = e;
899 seq_printf(seq, "%s %s %d %d\n",
900 batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
901 sk->sk_state, rfcomm_pi(sk)->channel);
902 return 0;
903}
904
905static struct seq_operations rfcomm_seq_ops = {
906 .start = rfcomm_seq_start,
907 .next = rfcomm_seq_next,
908 .stop = rfcomm_seq_stop,
909 .show = rfcomm_seq_show
910};
911
912static int rfcomm_seq_open(struct inode *inode, struct file *file)
913{
914 return seq_open(file, &rfcomm_seq_ops);
915}
916
917static struct file_operations rfcomm_seq_fops = {
918 .owner = THIS_MODULE,
919 .open = rfcomm_seq_open,
920 .read = seq_read,
921 .llseek = seq_lseek,
922 .release = seq_release,
923};
924
925static int __init rfcomm_sock_proc_init(void)
926{
927 struct proc_dir_entry *p = create_proc_entry("sock", S_IRUGO, proc_bt_rfcomm);
928 if (!p)
929 return -ENOMEM;
930 p->proc_fops = &rfcomm_seq_fops;
931 return 0;
932}
933
934static void __exit rfcomm_sock_proc_cleanup(void)
935{
936 remove_proc_entry("sock", proc_bt_rfcomm);
937}
938
939#else /* CONFIG_PROC_FS */
940
941static int __init rfcomm_sock_proc_init(void)
942{
943 return 0;
944}
945
946static void __exit rfcomm_sock_proc_cleanup(void)
947{
948 return;
949}
950#endif /* CONFIG_PROC_FS */
951
952static struct proto_ops rfcomm_sock_ops = {
953 .family = PF_BLUETOOTH,
954 .owner = THIS_MODULE,
955 .release = rfcomm_sock_release,
956 .bind = rfcomm_sock_bind,
957 .connect = rfcomm_sock_connect,
958 .listen = rfcomm_sock_listen,
959 .accept = rfcomm_sock_accept,
960 .getname = rfcomm_sock_getname,
961 .sendmsg = rfcomm_sock_sendmsg,
962 .recvmsg = rfcomm_sock_recvmsg,
963 .shutdown = rfcomm_sock_shutdown,
964 .setsockopt = rfcomm_sock_setsockopt,
965 .getsockopt = rfcomm_sock_getsockopt,
966 .ioctl = rfcomm_sock_ioctl,
967 .poll = bt_sock_poll,
968 .socketpair = sock_no_socketpair,
969 .mmap = sock_no_mmap
970};
971
972static struct net_proto_family rfcomm_sock_family_ops = {
973 .family = PF_BLUETOOTH,
974 .owner = THIS_MODULE,
975 .create = rfcomm_sock_create
976};
977
978int __init rfcomm_init_sockets(void)
979{
980 int err;
981
982 err = proto_register(&rfcomm_proto, 0);
983 if (err < 0)
984 return err;
985
986 err = bt_sock_register(BTPROTO_RFCOMM, &rfcomm_sock_family_ops);
987 if (err < 0)
988 goto error;
989
990 rfcomm_sock_proc_init();
991
992 BT_INFO("RFCOMM socket layer initialized");
993
994 return 0;
995
996error:
997 BT_ERR("RFCOMM socket layer registration failed");
998 proto_unregister(&rfcomm_proto);
999 return err;
1000}
1001
1002void __exit rfcomm_cleanup_sockets(void)
1003{
1004 rfcomm_sock_proc_cleanup();
1005
1006 if (bt_sock_unregister(BTPROTO_RFCOMM) < 0)
1007 BT_ERR("RFCOMM socket layer unregistration failed");
1008
1009 proto_unregister(&rfcomm_proto);
1010}
kernel source for telekom puls (alcatel/mediatek)