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>
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;
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.
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.
28 #include <linux/module.h>
30 #include <linux/types.h>
31 #include <linux/errno.h>
32 #include <linux/kernel.h>
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>
42 #include <linux/device.h>
43 #include <linux/debugfs.h>
44 #include <linux/seq_file.h>
47 #include <asm/system.h>
48 #include <asm/uaccess.h>
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>
55 static const struct proto_ops rfcomm_sock_ops;
57 static struct bt_sock_list rfcomm_sk_list = {
58 .lock = __RW_LOCK_UNLOCKED(rfcomm_sk_list.lock)
61 static void rfcomm_sock_close(struct sock *sk);
62 static void rfcomm_sock_kill(struct sock *sk);
64 /* ---- DLC callbacks ----
66 * called under rfcomm_dlc_lock()
68 static void rfcomm_sk_data_ready(struct rfcomm_dlc *d, struct sk_buff *skb)
70 struct sock *sk = d->owner;
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);
78 if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)
79 rfcomm_dlc_throttle(d);
82 static void rfcomm_sk_state_change(struct rfcomm_dlc *d, int err)
84 struct sock *sk = d->owner, *parent;
90 BT_DBG("dlc %p state %ld err %d", d, d->state, err);
92 local_irq_save(flags);
98 sk->sk_state = d->state;
100 parent = bt_sk(sk)->parent;
102 if (d->state == BT_CLOSED) {
103 sock_set_flag(sk, SOCK_ZAPPED);
104 bt_accept_unlink(sk);
106 parent->sk_data_ready(parent, 0);
108 if (d->state == BT_CONNECTED)
109 rfcomm_session_getaddr(d->session, &bt_sk(sk)->src, NULL);
110 sk->sk_state_change(sk);
114 local_irq_restore(flags);
116 if (parent && sock_flag(sk, SOCK_ZAPPED)) {
117 /* We have to drop DLC lock here, otherwise
118 * rfcomm_sock_destruct() will dead lock. */
119 rfcomm_dlc_unlock(d);
120 rfcomm_sock_kill(sk);
125 /* ---- Socket functions ---- */
126 static struct sock *__rfcomm_get_sock_by_addr(u8 channel, bdaddr_t *src)
128 struct sock *sk = NULL;
129 struct hlist_node *node;
131 sk_for_each(sk, node, &rfcomm_sk_list.head) {
132 if (rfcomm_pi(sk)->channel == channel &&
133 !bacmp(&bt_sk(sk)->src, src))
137 return node ? sk : NULL;
140 /* Find socket with channel and source bdaddr.
141 * Returns closest match.
143 static struct sock *__rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
145 struct sock *sk = NULL, *sk1 = NULL;
146 struct hlist_node *node;
148 sk_for_each(sk, node, &rfcomm_sk_list.head) {
149 if (state && sk->sk_state != state)
152 if (rfcomm_pi(sk)->channel == channel) {
154 if (!bacmp(&bt_sk(sk)->src, src))
158 if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
162 return node ? sk : sk1;
165 /* Find socket with given address (channel, src).
166 * Returns locked socket */
167 static inline struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
170 read_lock(&rfcomm_sk_list.lock);
171 s = __rfcomm_get_sock_by_channel(state, channel, src);
172 if (s) bh_lock_sock(s);
173 read_unlock(&rfcomm_sk_list.lock);
177 static void rfcomm_sock_destruct(struct sock *sk)
179 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
181 BT_DBG("sk %p dlc %p", sk, d);
183 skb_queue_purge(&sk->sk_receive_queue);
184 skb_queue_purge(&sk->sk_write_queue);
187 rfcomm_pi(sk)->dlc = NULL;
189 /* Detach DLC if it's owned by this socket */
192 rfcomm_dlc_unlock(d);
197 static void rfcomm_sock_cleanup_listen(struct sock *parent)
201 BT_DBG("parent %p", parent);
203 /* Close not yet accepted dlcs */
204 while ((sk = bt_accept_dequeue(parent, NULL))) {
205 rfcomm_sock_close(sk);
206 rfcomm_sock_kill(sk);
209 parent->sk_state = BT_CLOSED;
210 sock_set_flag(parent, SOCK_ZAPPED);
213 /* Kill socket (only if zapped and orphan)
214 * Must be called on unlocked socket.
216 static void rfcomm_sock_kill(struct sock *sk)
218 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
221 BT_DBG("sk %p state %d refcnt %d", sk, sk->sk_state, atomic_read(&sk->sk_refcnt));
223 /* Kill poor orphan */
224 bt_sock_unlink(&rfcomm_sk_list, sk);
225 sock_set_flag(sk, SOCK_DEAD);
229 static void __rfcomm_sock_close(struct sock *sk)
231 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
233 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
235 switch (sk->sk_state) {
237 rfcomm_sock_cleanup_listen(sk);
244 rfcomm_dlc_close(d, 0);
247 sock_set_flag(sk, SOCK_ZAPPED);
253 * Must be called on unlocked socket.
255 static void rfcomm_sock_close(struct sock *sk)
258 __rfcomm_sock_close(sk);
262 static void rfcomm_sock_init(struct sock *sk, struct sock *parent)
264 struct rfcomm_pinfo *pi = rfcomm_pi(sk);
269 sk->sk_type = parent->sk_type;
270 pi->dlc->defer_setup = bt_sk(parent)->defer_setup;
272 pi->sec_level = rfcomm_pi(parent)->sec_level;
273 pi->role_switch = rfcomm_pi(parent)->role_switch;
275 pi->dlc->defer_setup = 0;
277 pi->sec_level = BT_SECURITY_LOW;
281 pi->dlc->sec_level = pi->sec_level;
282 pi->dlc->role_switch = pi->role_switch;
285 static struct proto rfcomm_proto = {
287 .owner = THIS_MODULE,
288 .obj_size = sizeof(struct rfcomm_pinfo)
291 static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
293 struct rfcomm_dlc *d;
296 sk = sk_alloc(net, PF_BLUETOOTH, prio, &rfcomm_proto);
300 sock_init_data(sock, sk);
301 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
303 d = rfcomm_dlc_alloc(prio);
309 d->data_ready = rfcomm_sk_data_ready;
310 d->state_change = rfcomm_sk_state_change;
312 rfcomm_pi(sk)->dlc = d;
315 sk->sk_destruct = rfcomm_sock_destruct;
316 sk->sk_sndtimeo = RFCOMM_CONN_TIMEOUT;
318 sk->sk_sndbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
319 sk->sk_rcvbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
321 sock_reset_flag(sk, SOCK_ZAPPED);
323 sk->sk_protocol = proto;
324 sk->sk_state = BT_OPEN;
326 bt_sock_link(&rfcomm_sk_list, sk);
332 static int rfcomm_sock_create(struct net *net, struct socket *sock,
333 int protocol, int kern)
337 BT_DBG("sock %p", sock);
339 sock->state = SS_UNCONNECTED;
341 if (sock->type != SOCK_STREAM && sock->type != SOCK_RAW)
342 return -ESOCKTNOSUPPORT;
344 sock->ops = &rfcomm_sock_ops;
346 sk = rfcomm_sock_alloc(net, sock, protocol, GFP_ATOMIC);
350 rfcomm_sock_init(sk, NULL);
354 static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
356 struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
357 struct sock *sk = sock->sk;
360 BT_DBG("sk %p %s", sk, batostr(&sa->rc_bdaddr));
362 if (!addr || addr->sa_family != AF_BLUETOOTH)
367 if (sk->sk_state != BT_OPEN) {
372 if (sk->sk_type != SOCK_STREAM) {
377 write_lock_bh(&rfcomm_sk_list.lock);
379 if (sa->rc_channel && __rfcomm_get_sock_by_addr(sa->rc_channel, &sa->rc_bdaddr)) {
382 /* Save source address */
383 bacpy(&bt_sk(sk)->src, &sa->rc_bdaddr);
384 rfcomm_pi(sk)->channel = sa->rc_channel;
385 sk->sk_state = BT_BOUND;
388 write_unlock_bh(&rfcomm_sk_list.lock);
395 static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
397 struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
398 struct sock *sk = sock->sk;
399 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
404 if (alen < sizeof(struct sockaddr_rc) ||
405 addr->sa_family != AF_BLUETOOTH)
410 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) {
415 if (sk->sk_type != SOCK_STREAM) {
420 sk->sk_state = BT_CONNECT;
421 bacpy(&bt_sk(sk)->dst, &sa->rc_bdaddr);
422 rfcomm_pi(sk)->channel = sa->rc_channel;
424 d->sec_level = rfcomm_pi(sk)->sec_level;
425 d->role_switch = rfcomm_pi(sk)->role_switch;
427 err = rfcomm_dlc_open(d, &bt_sk(sk)->src, &sa->rc_bdaddr, sa->rc_channel);
429 err = bt_sock_wait_state(sk, BT_CONNECTED,
430 sock_sndtimeo(sk, flags & O_NONBLOCK));
437 static int rfcomm_sock_listen(struct socket *sock, int backlog)
439 struct sock *sk = sock->sk;
442 BT_DBG("sk %p backlog %d", sk, backlog);
446 if (sk->sk_state != BT_BOUND) {
451 if (sk->sk_type != SOCK_STREAM) {
456 if (!rfcomm_pi(sk)->channel) {
457 bdaddr_t *src = &bt_sk(sk)->src;
462 write_lock_bh(&rfcomm_sk_list.lock);
464 for (channel = 1; channel < 31; channel++)
465 if (!__rfcomm_get_sock_by_addr(channel, src)) {
466 rfcomm_pi(sk)->channel = channel;
471 write_unlock_bh(&rfcomm_sk_list.lock);
477 sk->sk_max_ack_backlog = backlog;
478 sk->sk_ack_backlog = 0;
479 sk->sk_state = BT_LISTEN;
486 static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int flags)
488 DECLARE_WAITQUEUE(wait, current);
489 struct sock *sk = sock->sk, *nsk;
495 if (sk->sk_state != BT_LISTEN) {
500 if (sk->sk_type != SOCK_STREAM) {
505 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
507 BT_DBG("sk %p timeo %ld", sk, timeo);
509 /* Wait for an incoming connection. (wake-one). */
510 add_wait_queue_exclusive(sk_sleep(sk), &wait);
511 while (!(nsk = bt_accept_dequeue(sk, newsock))) {
512 set_current_state(TASK_INTERRUPTIBLE);
519 timeo = schedule_timeout(timeo);
522 if (sk->sk_state != BT_LISTEN) {
527 if (signal_pending(current)) {
528 err = sock_intr_errno(timeo);
532 set_current_state(TASK_RUNNING);
533 remove_wait_queue(sk_sleep(sk), &wait);
538 newsock->state = SS_CONNECTED;
540 BT_DBG("new socket %p", nsk);
547 static int rfcomm_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
549 struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
550 struct sock *sk = sock->sk;
552 BT_DBG("sock %p, sk %p", sock, sk);
554 sa->rc_family = AF_BLUETOOTH;
555 sa->rc_channel = rfcomm_pi(sk)->channel;
557 bacpy(&sa->rc_bdaddr, &bt_sk(sk)->dst);
559 bacpy(&sa->rc_bdaddr, &bt_sk(sk)->src);
561 *len = sizeof(struct sockaddr_rc);
565 static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
566 struct msghdr *msg, size_t len)
568 struct sock *sk = sock->sk;
569 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
573 if (test_bit(RFCOMM_DEFER_SETUP, &d->flags))
576 if (msg->msg_flags & MSG_OOB)
579 if (sk->sk_shutdown & SEND_SHUTDOWN)
582 BT_DBG("sock %p, sk %p", sock, sk);
587 size_t size = min_t(size_t, len, d->mtu);
590 skb = sock_alloc_send_skb(sk, size + RFCOMM_SKB_RESERVE,
591 msg->msg_flags & MSG_DONTWAIT, &err);
597 skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE);
599 err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
607 err = rfcomm_dlc_send(d, skb);
624 static long rfcomm_sock_data_wait(struct sock *sk, long timeo)
626 DECLARE_WAITQUEUE(wait, current);
628 add_wait_queue(sk_sleep(sk), &wait);
630 set_current_state(TASK_INTERRUPTIBLE);
632 if (!skb_queue_empty(&sk->sk_receive_queue) ||
634 (sk->sk_shutdown & RCV_SHUTDOWN) ||
635 signal_pending(current) ||
639 set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
641 timeo = schedule_timeout(timeo);
643 clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
646 __set_current_state(TASK_RUNNING);
647 remove_wait_queue(sk_sleep(sk), &wait);
651 static int rfcomm_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
652 struct msghdr *msg, size_t size, int flags)
654 struct sock *sk = sock->sk;
655 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
657 size_t target, copied = 0;
660 if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) {
661 rfcomm_dlc_accept(d);
668 msg->msg_namelen = 0;
670 BT_DBG("sk %p size %zu", sk, size);
674 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
675 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
681 skb = skb_dequeue(&sk->sk_receive_queue);
683 if (copied >= target)
686 if ((err = sock_error(sk)) != 0)
688 if (sk->sk_shutdown & RCV_SHUTDOWN)
695 timeo = rfcomm_sock_data_wait(sk, timeo);
697 if (signal_pending(current)) {
698 err = sock_intr_errno(timeo);
704 chunk = min_t(unsigned int, skb->len, size);
705 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
706 skb_queue_head(&sk->sk_receive_queue, skb);
714 sock_recv_ts_and_drops(msg, sk, skb);
716 if (!(flags & MSG_PEEK)) {
717 atomic_sub(chunk, &sk->sk_rmem_alloc);
719 skb_pull(skb, chunk);
721 skb_queue_head(&sk->sk_receive_queue, skb);
727 /* put message back and return */
728 skb_queue_head(&sk->sk_receive_queue, skb);
734 if (atomic_read(&sk->sk_rmem_alloc) <= (sk->sk_rcvbuf >> 2))
735 rfcomm_dlc_unthrottle(rfcomm_pi(sk)->dlc);
738 return copied ? : err;
741 static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen)
743 struct sock *sk = sock->sk;
753 if (get_user(opt, (u32 __user *) optval)) {
758 if (opt & RFCOMM_LM_AUTH)
759 rfcomm_pi(sk)->sec_level = BT_SECURITY_LOW;
760 if (opt & RFCOMM_LM_ENCRYPT)
761 rfcomm_pi(sk)->sec_level = BT_SECURITY_MEDIUM;
762 if (opt & RFCOMM_LM_SECURE)
763 rfcomm_pi(sk)->sec_level = BT_SECURITY_HIGH;
765 rfcomm_pi(sk)->role_switch = (opt & RFCOMM_LM_MASTER);
777 static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
779 struct sock *sk = sock->sk;
780 struct bt_security sec;
786 if (level == SOL_RFCOMM)
787 return rfcomm_sock_setsockopt_old(sock, optname, optval, optlen);
789 if (level != SOL_BLUETOOTH)
796 if (sk->sk_type != SOCK_STREAM) {
801 sec.level = BT_SECURITY_LOW;
803 len = min_t(unsigned int, sizeof(sec), optlen);
804 if (copy_from_user((char *) &sec, optval, len)) {
809 if (sec.level > BT_SECURITY_HIGH) {
814 rfcomm_pi(sk)->sec_level = sec.level;
818 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
823 if (get_user(opt, (u32 __user *) optval)) {
828 bt_sk(sk)->defer_setup = opt;
840 static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
842 struct sock *sk = sock->sk;
843 struct sock *l2cap_sk;
844 struct rfcomm_conninfo cinfo;
850 if (get_user(len, optlen))
857 switch (rfcomm_pi(sk)->sec_level) {
858 case BT_SECURITY_LOW:
859 opt = RFCOMM_LM_AUTH;
861 case BT_SECURITY_MEDIUM:
862 opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT;
864 case BT_SECURITY_HIGH:
865 opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT |
873 if (rfcomm_pi(sk)->role_switch)
874 opt |= RFCOMM_LM_MASTER;
876 if (put_user(opt, (u32 __user *) optval))
880 case RFCOMM_CONNINFO:
881 if (sk->sk_state != BT_CONNECTED &&
882 !rfcomm_pi(sk)->dlc->defer_setup) {
887 l2cap_sk = rfcomm_pi(sk)->dlc->session->sock->sk;
889 cinfo.hci_handle = l2cap_pi(l2cap_sk)->conn->hcon->handle;
890 memcpy(cinfo.dev_class, l2cap_pi(l2cap_sk)->conn->hcon->dev_class, 3);
892 len = min_t(unsigned int, len, sizeof(cinfo));
893 if (copy_to_user(optval, (char *) &cinfo, len))
907 static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
909 struct sock *sk = sock->sk;
910 struct bt_security sec;
915 if (level == SOL_RFCOMM)
916 return rfcomm_sock_getsockopt_old(sock, optname, optval, optlen);
918 if (level != SOL_BLUETOOTH)
921 if (get_user(len, optlen))
928 if (sk->sk_type != SOCK_STREAM) {
933 sec.level = rfcomm_pi(sk)->sec_level;
935 len = min_t(unsigned int, len, sizeof(sec));
936 if (copy_to_user(optval, (char *) &sec, len))
942 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
947 if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval))
961 static int rfcomm_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
963 struct sock *sk __maybe_unused = sock->sk;
966 BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
968 err = bt_sock_ioctl(sock, cmd, arg);
970 if (err == -ENOIOCTLCMD) {
971 #ifdef CONFIG_BT_RFCOMM_TTY
973 err = rfcomm_dev_ioctl(sk, cmd, (void __user *) arg);
983 static int rfcomm_sock_shutdown(struct socket *sock, int how)
985 struct sock *sk = sock->sk;
988 BT_DBG("sock %p, sk %p", sock, sk);
993 if (!sk->sk_shutdown) {
994 sk->sk_shutdown = SHUTDOWN_MASK;
995 __rfcomm_sock_close(sk);
997 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
998 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1004 static int rfcomm_sock_release(struct socket *sock)
1006 struct sock *sk = sock->sk;
1009 BT_DBG("sock %p, sk %p", sock, sk);
1014 err = rfcomm_sock_shutdown(sock, 2);
1017 rfcomm_sock_kill(sk);
1021 /* ---- RFCOMM core layer callbacks ----
1023 * called under rfcomm_lock()
1025 int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d)
1027 struct sock *sk, *parent;
1031 BT_DBG("session %p channel %d", s, channel);
1033 rfcomm_session_getaddr(s, &src, &dst);
1035 /* Check if we have socket listening on channel */
1036 parent = rfcomm_get_sock_by_channel(BT_LISTEN, channel, &src);
1040 /* Check for backlog size */
1041 if (sk_acceptq_is_full(parent)) {
1042 BT_DBG("backlog full %d", parent->sk_ack_backlog);
1046 sk = rfcomm_sock_alloc(sock_net(parent), NULL, BTPROTO_RFCOMM, GFP_ATOMIC);
1050 rfcomm_sock_init(sk, parent);
1051 bacpy(&bt_sk(sk)->src, &src);
1052 bacpy(&bt_sk(sk)->dst, &dst);
1053 rfcomm_pi(sk)->channel = channel;
1055 sk->sk_state = BT_CONFIG;
1056 bt_accept_enqueue(parent, sk);
1058 /* Accept connection and return socket DLC */
1059 *d = rfcomm_pi(sk)->dlc;
1063 bh_unlock_sock(parent);
1065 if (bt_sk(parent)->defer_setup)
1066 parent->sk_state_change(parent);
1071 static int rfcomm_sock_debugfs_show(struct seq_file *f, void *p)
1074 struct hlist_node *node;
1076 read_lock_bh(&rfcomm_sk_list.lock);
1078 sk_for_each(sk, node, &rfcomm_sk_list.head) {
1079 seq_printf(f, "%s %s %d %d\n",
1080 batostr(&bt_sk(sk)->src),
1081 batostr(&bt_sk(sk)->dst),
1082 sk->sk_state, rfcomm_pi(sk)->channel);
1085 read_unlock_bh(&rfcomm_sk_list.lock);
1090 static int rfcomm_sock_debugfs_open(struct inode *inode, struct file *file)
1092 return single_open(file, rfcomm_sock_debugfs_show, inode->i_private);
1095 static const struct file_operations rfcomm_sock_debugfs_fops = {
1096 .open = rfcomm_sock_debugfs_open,
1098 .llseek = seq_lseek,
1099 .release = single_release,
1102 static struct dentry *rfcomm_sock_debugfs;
1104 static const struct proto_ops rfcomm_sock_ops = {
1105 .family = PF_BLUETOOTH,
1106 .owner = THIS_MODULE,
1107 .release = rfcomm_sock_release,
1108 .bind = rfcomm_sock_bind,
1109 .connect = rfcomm_sock_connect,
1110 .listen = rfcomm_sock_listen,
1111 .accept = rfcomm_sock_accept,
1112 .getname = rfcomm_sock_getname,
1113 .sendmsg = rfcomm_sock_sendmsg,
1114 .recvmsg = rfcomm_sock_recvmsg,
1115 .shutdown = rfcomm_sock_shutdown,
1116 .setsockopt = rfcomm_sock_setsockopt,
1117 .getsockopt = rfcomm_sock_getsockopt,
1118 .ioctl = rfcomm_sock_ioctl,
1119 .poll = bt_sock_poll,
1120 .socketpair = sock_no_socketpair,
1121 .mmap = sock_no_mmap
1124 static const struct net_proto_family rfcomm_sock_family_ops = {
1125 .family = PF_BLUETOOTH,
1126 .owner = THIS_MODULE,
1127 .create = rfcomm_sock_create
1130 int __init rfcomm_init_sockets(void)
1134 err = proto_register(&rfcomm_proto, 0);
1138 err = bt_sock_register(BTPROTO_RFCOMM, &rfcomm_sock_family_ops);
1143 rfcomm_sock_debugfs = debugfs_create_file("rfcomm", 0444,
1144 bt_debugfs, NULL, &rfcomm_sock_debugfs_fops);
1145 if (!rfcomm_sock_debugfs)
1146 BT_ERR("Failed to create RFCOMM debug file");
1149 BT_INFO("RFCOMM socket layer initialized");
1154 BT_ERR("RFCOMM socket layer registration failed");
1155 proto_unregister(&rfcomm_proto);
1159 void __exit rfcomm_cleanup_sockets(void)
1161 debugfs_remove(rfcomm_sock_debugfs);
1163 if (bt_sock_unregister(BTPROTO_RFCOMM) < 0)
1164 BT_ERR("RFCOMM socket layer unregistration failed");
1166 proto_unregister(&rfcomm_proto);