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>
45 #include <asm/system.h>
46 #include <asm/uaccess.h>
48 #include <net/bluetooth/bluetooth.h>
49 #include <net/bluetooth/hci_core.h>
50 #include <net/bluetooth/l2cap.h>
51 #include <net/bluetooth/rfcomm.h>
53 static const struct proto_ops rfcomm_sock_ops;
55 static struct bt_sock_list rfcomm_sk_list = {
56 .lock = __RW_LOCK_UNLOCKED(rfcomm_sk_list.lock)
59 static void rfcomm_sock_close(struct sock *sk);
60 static void rfcomm_sock_kill(struct sock *sk);
62 /* ---- DLC callbacks ----
64 * called under rfcomm_dlc_lock()
66 static void rfcomm_sk_data_ready(struct rfcomm_dlc *d, struct sk_buff *skb)
68 struct sock *sk = d->owner;
72 atomic_add(skb->len, &sk->sk_rmem_alloc);
73 skb_queue_tail(&sk->sk_receive_queue, skb);
74 sk->sk_data_ready(sk, skb->len);
76 if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf)
77 rfcomm_dlc_throttle(d);
80 static void rfcomm_sk_state_change(struct rfcomm_dlc *d, int err)
82 struct sock *sk = d->owner, *parent;
86 BT_DBG("dlc %p state %ld err %d", d, d->state, err);
93 sk->sk_state = d->state;
95 parent = bt_sk(sk)->parent;
97 if (d->state == BT_CLOSED) {
98 sock_set_flag(sk, SOCK_ZAPPED);
101 parent->sk_data_ready(parent, 0);
103 if (d->state == BT_CONNECTED)
104 rfcomm_session_getaddr(d->session, &bt_sk(sk)->src, NULL);
105 sk->sk_state_change(sk);
110 if (parent && sock_flag(sk, SOCK_ZAPPED)) {
111 /* We have to drop DLC lock here, otherwise
112 * rfcomm_sock_destruct() will dead lock. */
113 rfcomm_dlc_unlock(d);
114 rfcomm_sock_kill(sk);
119 /* ---- Socket functions ---- */
120 static struct sock *__rfcomm_get_sock_by_addr(u8 channel, bdaddr_t *src)
122 struct sock *sk = NULL;
123 struct hlist_node *node;
125 sk_for_each(sk, node, &rfcomm_sk_list.head) {
126 if (rfcomm_pi(sk)->channel == channel &&
127 !bacmp(&bt_sk(sk)->src, src))
131 return node ? sk : NULL;
134 /* Find socket with channel and source bdaddr.
135 * Returns closest match.
137 static struct sock *__rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
139 struct sock *sk = NULL, *sk1 = NULL;
140 struct hlist_node *node;
142 sk_for_each(sk, node, &rfcomm_sk_list.head) {
143 if (state && sk->sk_state != state)
146 if (rfcomm_pi(sk)->channel == channel) {
148 if (!bacmp(&bt_sk(sk)->src, src))
152 if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
156 return node ? sk : sk1;
159 /* Find socket with given address (channel, src).
160 * Returns locked socket */
161 static inline struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
164 read_lock(&rfcomm_sk_list.lock);
165 s = __rfcomm_get_sock_by_channel(state, channel, src);
166 if (s) bh_lock_sock(s);
167 read_unlock(&rfcomm_sk_list.lock);
171 static void rfcomm_sock_destruct(struct sock *sk)
173 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
175 BT_DBG("sk %p dlc %p", sk, d);
177 skb_queue_purge(&sk->sk_receive_queue);
178 skb_queue_purge(&sk->sk_write_queue);
181 rfcomm_pi(sk)->dlc = NULL;
183 /* Detach DLC if it's owned by this socket */
186 rfcomm_dlc_unlock(d);
191 static void rfcomm_sock_cleanup_listen(struct sock *parent)
195 BT_DBG("parent %p", parent);
197 /* Close not yet accepted dlcs */
198 while ((sk = bt_accept_dequeue(parent, NULL))) {
199 rfcomm_sock_close(sk);
200 rfcomm_sock_kill(sk);
203 parent->sk_state = BT_CLOSED;
204 sock_set_flag(parent, SOCK_ZAPPED);
207 /* Kill socket (only if zapped and orphan)
208 * Must be called on unlocked socket.
210 static void rfcomm_sock_kill(struct sock *sk)
212 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
215 BT_DBG("sk %p state %d refcnt %d", sk, sk->sk_state, atomic_read(&sk->sk_refcnt));
217 /* Kill poor orphan */
218 bt_sock_unlink(&rfcomm_sk_list, sk);
219 sock_set_flag(sk, SOCK_DEAD);
223 static void __rfcomm_sock_close(struct sock *sk)
225 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
227 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
229 switch (sk->sk_state) {
231 rfcomm_sock_cleanup_listen(sk);
238 rfcomm_dlc_close(d, 0);
241 sock_set_flag(sk, SOCK_ZAPPED);
247 * Must be called on unlocked socket.
249 static void rfcomm_sock_close(struct sock *sk)
252 __rfcomm_sock_close(sk);
256 static void rfcomm_sock_init(struct sock *sk, struct sock *parent)
258 struct rfcomm_pinfo *pi = rfcomm_pi(sk);
263 sk->sk_type = parent->sk_type;
264 pi->dlc->defer_setup = bt_sk(parent)->defer_setup;
266 pi->sec_level = rfcomm_pi(parent)->sec_level;
267 pi->role_switch = rfcomm_pi(parent)->role_switch;
269 pi->dlc->defer_setup = 0;
271 pi->sec_level = BT_SECURITY_LOW;
275 pi->dlc->sec_level = pi->sec_level;
276 pi->dlc->role_switch = pi->role_switch;
279 static struct proto rfcomm_proto = {
281 .owner = THIS_MODULE,
282 .obj_size = sizeof(struct rfcomm_pinfo)
285 static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
287 struct rfcomm_dlc *d;
290 sk = sk_alloc(net, PF_BLUETOOTH, prio, &rfcomm_proto);
294 sock_init_data(sock, sk);
295 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
297 d = rfcomm_dlc_alloc(prio);
303 d->data_ready = rfcomm_sk_data_ready;
304 d->state_change = rfcomm_sk_state_change;
306 rfcomm_pi(sk)->dlc = d;
309 sk->sk_destruct = rfcomm_sock_destruct;
310 sk->sk_sndtimeo = RFCOMM_CONN_TIMEOUT;
312 sk->sk_sndbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
313 sk->sk_rcvbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10;
315 sock_reset_flag(sk, SOCK_ZAPPED);
317 sk->sk_protocol = proto;
318 sk->sk_state = BT_OPEN;
320 bt_sock_link(&rfcomm_sk_list, sk);
326 static int rfcomm_sock_create(struct net *net, struct socket *sock, int protocol)
330 BT_DBG("sock %p", sock);
332 sock->state = SS_UNCONNECTED;
334 if (sock->type != SOCK_STREAM && sock->type != SOCK_RAW)
335 return -ESOCKTNOSUPPORT;
337 sock->ops = &rfcomm_sock_ops;
339 sk = rfcomm_sock_alloc(net, sock, protocol, GFP_ATOMIC);
343 rfcomm_sock_init(sk, NULL);
347 static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
349 struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
350 struct sock *sk = sock->sk;
353 BT_DBG("sk %p %s", sk, batostr(&sa->rc_bdaddr));
355 if (!addr || addr->sa_family != AF_BLUETOOTH)
360 if (sk->sk_state != BT_OPEN) {
365 if (sk->sk_type != SOCK_STREAM) {
370 write_lock_bh(&rfcomm_sk_list.lock);
372 if (sa->rc_channel && __rfcomm_get_sock_by_addr(sa->rc_channel, &sa->rc_bdaddr)) {
375 /* Save source address */
376 bacpy(&bt_sk(sk)->src, &sa->rc_bdaddr);
377 rfcomm_pi(sk)->channel = sa->rc_channel;
378 sk->sk_state = BT_BOUND;
381 write_unlock_bh(&rfcomm_sk_list.lock);
388 static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
390 struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
391 struct sock *sk = sock->sk;
392 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
397 if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_rc))
402 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) {
407 if (sk->sk_type != SOCK_STREAM) {
412 sk->sk_state = BT_CONNECT;
413 bacpy(&bt_sk(sk)->dst, &sa->rc_bdaddr);
414 rfcomm_pi(sk)->channel = sa->rc_channel;
416 d->sec_level = rfcomm_pi(sk)->sec_level;
417 d->role_switch = rfcomm_pi(sk)->role_switch;
419 err = rfcomm_dlc_open(d, &bt_sk(sk)->src, &sa->rc_bdaddr, sa->rc_channel);
421 err = bt_sock_wait_state(sk, BT_CONNECTED,
422 sock_sndtimeo(sk, flags & O_NONBLOCK));
429 static int rfcomm_sock_listen(struct socket *sock, int backlog)
431 struct sock *sk = sock->sk;
434 BT_DBG("sk %p backlog %d", sk, backlog);
438 if (sk->sk_state != BT_BOUND) {
443 if (sk->sk_type != SOCK_STREAM) {
448 if (!rfcomm_pi(sk)->channel) {
449 bdaddr_t *src = &bt_sk(sk)->src;
454 write_lock_bh(&rfcomm_sk_list.lock);
456 for (channel = 1; channel < 31; channel++)
457 if (!__rfcomm_get_sock_by_addr(channel, src)) {
458 rfcomm_pi(sk)->channel = channel;
463 write_unlock_bh(&rfcomm_sk_list.lock);
469 sk->sk_max_ack_backlog = backlog;
470 sk->sk_ack_backlog = 0;
471 sk->sk_state = BT_LISTEN;
478 static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int flags)
480 DECLARE_WAITQUEUE(wait, current);
481 struct sock *sk = sock->sk, *nsk;
487 if (sk->sk_state != BT_LISTEN) {
492 if (sk->sk_type != SOCK_STREAM) {
497 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
499 BT_DBG("sk %p timeo %ld", sk, timeo);
501 /* Wait for an incoming connection. (wake-one). */
502 add_wait_queue_exclusive(sk->sk_sleep, &wait);
503 while (!(nsk = bt_accept_dequeue(sk, newsock))) {
504 set_current_state(TASK_INTERRUPTIBLE);
511 timeo = schedule_timeout(timeo);
514 if (sk->sk_state != BT_LISTEN) {
519 if (signal_pending(current)) {
520 err = sock_intr_errno(timeo);
524 set_current_state(TASK_RUNNING);
525 remove_wait_queue(sk->sk_sleep, &wait);
530 newsock->state = SS_CONNECTED;
532 BT_DBG("new socket %p", nsk);
539 static int rfcomm_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
541 struct sockaddr_rc *sa = (struct sockaddr_rc *) addr;
542 struct sock *sk = sock->sk;
544 BT_DBG("sock %p, sk %p", sock, sk);
546 sa->rc_family = AF_BLUETOOTH;
547 sa->rc_channel = rfcomm_pi(sk)->channel;
549 bacpy(&sa->rc_bdaddr, &bt_sk(sk)->dst);
551 bacpy(&sa->rc_bdaddr, &bt_sk(sk)->src);
553 *len = sizeof(struct sockaddr_rc);
557 static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
558 struct msghdr *msg, size_t len)
560 struct sock *sk = sock->sk;
561 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
565 if (test_bit(RFCOMM_DEFER_SETUP, &d->flags))
568 if (msg->msg_flags & MSG_OOB)
571 if (sk->sk_shutdown & SEND_SHUTDOWN)
574 BT_DBG("sock %p, sk %p", sock, sk);
579 size_t size = min_t(size_t, len, d->mtu);
582 skb = sock_alloc_send_skb(sk, size + RFCOMM_SKB_RESERVE,
583 msg->msg_flags & MSG_DONTWAIT, &err);
589 skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE);
591 err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
599 err = rfcomm_dlc_send(d, skb);
616 static long rfcomm_sock_data_wait(struct sock *sk, long timeo)
618 DECLARE_WAITQUEUE(wait, current);
620 add_wait_queue(sk->sk_sleep, &wait);
622 set_current_state(TASK_INTERRUPTIBLE);
624 if (!skb_queue_empty(&sk->sk_receive_queue) ||
626 (sk->sk_shutdown & RCV_SHUTDOWN) ||
627 signal_pending(current) ||
631 set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
633 timeo = schedule_timeout(timeo);
635 clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
638 __set_current_state(TASK_RUNNING);
639 remove_wait_queue(sk->sk_sleep, &wait);
643 static int rfcomm_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
644 struct msghdr *msg, size_t size, int flags)
646 struct sock *sk = sock->sk;
647 struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc;
649 size_t target, copied = 0;
652 if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) {
653 rfcomm_dlc_accept(d);
660 msg->msg_namelen = 0;
662 BT_DBG("sk %p size %zu", sk, size);
666 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
667 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
673 skb = skb_dequeue(&sk->sk_receive_queue);
675 if (copied >= target)
678 if ((err = sock_error(sk)) != 0)
680 if (sk->sk_shutdown & RCV_SHUTDOWN)
687 timeo = rfcomm_sock_data_wait(sk, timeo);
689 if (signal_pending(current)) {
690 err = sock_intr_errno(timeo);
696 chunk = min_t(unsigned int, skb->len, size);
697 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
698 skb_queue_head(&sk->sk_receive_queue, skb);
706 sock_recv_timestamp(msg, sk, skb);
708 if (!(flags & MSG_PEEK)) {
709 atomic_sub(chunk, &sk->sk_rmem_alloc);
711 skb_pull(skb, chunk);
713 skb_queue_head(&sk->sk_receive_queue, skb);
719 /* put message back and return */
720 skb_queue_head(&sk->sk_receive_queue, skb);
726 if (atomic_read(&sk->sk_rmem_alloc) <= (sk->sk_rcvbuf >> 2))
727 rfcomm_dlc_unthrottle(rfcomm_pi(sk)->dlc);
730 return copied ? : err;
733 static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen)
735 struct sock *sk = sock->sk;
745 if (get_user(opt, (u32 __user *) optval)) {
750 if (opt & RFCOMM_LM_AUTH)
751 rfcomm_pi(sk)->sec_level = BT_SECURITY_LOW;
752 if (opt & RFCOMM_LM_ENCRYPT)
753 rfcomm_pi(sk)->sec_level = BT_SECURITY_MEDIUM;
754 if (opt & RFCOMM_LM_SECURE)
755 rfcomm_pi(sk)->sec_level = BT_SECURITY_HIGH;
757 rfcomm_pi(sk)->role_switch = (opt & RFCOMM_LM_MASTER);
769 static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
771 struct sock *sk = sock->sk;
772 struct bt_security sec;
778 if (level == SOL_RFCOMM)
779 return rfcomm_sock_setsockopt_old(sock, optname, optval, optlen);
781 if (level != SOL_BLUETOOTH)
788 if (sk->sk_type != SOCK_STREAM) {
793 sec.level = BT_SECURITY_LOW;
795 len = min_t(unsigned int, sizeof(sec), optlen);
796 if (copy_from_user((char *) &sec, optval, len)) {
801 if (sec.level > BT_SECURITY_HIGH) {
806 rfcomm_pi(sk)->sec_level = sec.level;
810 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
815 if (get_user(opt, (u32 __user *) optval)) {
820 bt_sk(sk)->defer_setup = opt;
832 static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
834 struct sock *sk = sock->sk;
835 struct sock *l2cap_sk;
836 struct rfcomm_conninfo cinfo;
842 if (get_user(len, optlen))
849 switch (rfcomm_pi(sk)->sec_level) {
850 case BT_SECURITY_LOW:
851 opt = RFCOMM_LM_AUTH;
853 case BT_SECURITY_MEDIUM:
854 opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT;
856 case BT_SECURITY_HIGH:
857 opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT |
865 if (rfcomm_pi(sk)->role_switch)
866 opt |= RFCOMM_LM_MASTER;
868 if (put_user(opt, (u32 __user *) optval))
872 case RFCOMM_CONNINFO:
873 if (sk->sk_state != BT_CONNECTED &&
874 !rfcomm_pi(sk)->dlc->defer_setup) {
879 l2cap_sk = rfcomm_pi(sk)->dlc->session->sock->sk;
881 cinfo.hci_handle = l2cap_pi(l2cap_sk)->conn->hcon->handle;
882 memcpy(cinfo.dev_class, l2cap_pi(l2cap_sk)->conn->hcon->dev_class, 3);
884 len = min_t(unsigned int, len, sizeof(cinfo));
885 if (copy_to_user(optval, (char *) &cinfo, len))
899 static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
901 struct sock *sk = sock->sk;
902 struct bt_security sec;
907 if (level == SOL_RFCOMM)
908 return rfcomm_sock_getsockopt_old(sock, optname, optval, optlen);
910 if (level != SOL_BLUETOOTH)
913 if (get_user(len, optlen))
920 if (sk->sk_type != SOCK_STREAM) {
925 sec.level = rfcomm_pi(sk)->sec_level;
927 len = min_t(unsigned int, len, sizeof(sec));
928 if (copy_to_user(optval, (char *) &sec, len))
934 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
939 if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval))
953 static int rfcomm_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
955 struct sock *sk __maybe_unused = sock->sk;
958 BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
960 err = bt_sock_ioctl(sock, cmd, arg);
962 if (err == -ENOIOCTLCMD) {
963 #ifdef CONFIG_BT_RFCOMM_TTY
965 err = rfcomm_dev_ioctl(sk, cmd, (void __user *) arg);
975 static int rfcomm_sock_shutdown(struct socket *sock, int how)
977 struct sock *sk = sock->sk;
980 BT_DBG("sock %p, sk %p", sock, sk);
985 if (!sk->sk_shutdown) {
986 sk->sk_shutdown = SHUTDOWN_MASK;
987 __rfcomm_sock_close(sk);
989 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
990 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
996 static int rfcomm_sock_release(struct socket *sock)
998 struct sock *sk = sock->sk;
1001 BT_DBG("sock %p, sk %p", sock, sk);
1006 err = rfcomm_sock_shutdown(sock, 2);
1009 rfcomm_sock_kill(sk);
1013 /* ---- RFCOMM core layer callbacks ----
1015 * called under rfcomm_lock()
1017 int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d)
1019 struct sock *sk, *parent;
1023 BT_DBG("session %p channel %d", s, channel);
1025 rfcomm_session_getaddr(s, &src, &dst);
1027 /* Check if we have socket listening on channel */
1028 parent = rfcomm_get_sock_by_channel(BT_LISTEN, channel, &src);
1032 /* Check for backlog size */
1033 if (sk_acceptq_is_full(parent)) {
1034 BT_DBG("backlog full %d", parent->sk_ack_backlog);
1038 sk = rfcomm_sock_alloc(sock_net(parent), NULL, BTPROTO_RFCOMM, GFP_ATOMIC);
1042 rfcomm_sock_init(sk, parent);
1043 bacpy(&bt_sk(sk)->src, &src);
1044 bacpy(&bt_sk(sk)->dst, &dst);
1045 rfcomm_pi(sk)->channel = channel;
1047 sk->sk_state = BT_CONFIG;
1048 bt_accept_enqueue(parent, sk);
1050 /* Accept connection and return socket DLC */
1051 *d = rfcomm_pi(sk)->dlc;
1055 bh_unlock_sock(parent);
1057 if (bt_sk(parent)->defer_setup)
1058 parent->sk_state_change(parent);
1063 static ssize_t rfcomm_sock_sysfs_show(struct class *dev, char *buf)
1066 struct hlist_node *node;
1069 read_lock_bh(&rfcomm_sk_list.lock);
1071 sk_for_each(sk, node, &rfcomm_sk_list.head) {
1072 str += sprintf(str, "%s %s %d %d\n",
1073 batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
1074 sk->sk_state, rfcomm_pi(sk)->channel);
1077 read_unlock_bh(&rfcomm_sk_list.lock);
1082 static CLASS_ATTR(rfcomm, S_IRUGO, rfcomm_sock_sysfs_show, NULL);
1084 static const struct proto_ops rfcomm_sock_ops = {
1085 .family = PF_BLUETOOTH,
1086 .owner = THIS_MODULE,
1087 .release = rfcomm_sock_release,
1088 .bind = rfcomm_sock_bind,
1089 .connect = rfcomm_sock_connect,
1090 .listen = rfcomm_sock_listen,
1091 .accept = rfcomm_sock_accept,
1092 .getname = rfcomm_sock_getname,
1093 .sendmsg = rfcomm_sock_sendmsg,
1094 .recvmsg = rfcomm_sock_recvmsg,
1095 .shutdown = rfcomm_sock_shutdown,
1096 .setsockopt = rfcomm_sock_setsockopt,
1097 .getsockopt = rfcomm_sock_getsockopt,
1098 .ioctl = rfcomm_sock_ioctl,
1099 .poll = bt_sock_poll,
1100 .socketpair = sock_no_socketpair,
1101 .mmap = sock_no_mmap
1104 static struct net_proto_family rfcomm_sock_family_ops = {
1105 .family = PF_BLUETOOTH,
1106 .owner = THIS_MODULE,
1107 .create = rfcomm_sock_create
1110 int __init rfcomm_init_sockets(void)
1114 err = proto_register(&rfcomm_proto, 0);
1118 err = bt_sock_register(BTPROTO_RFCOMM, &rfcomm_sock_family_ops);
1122 if (class_create_file(bt_class, &class_attr_rfcomm) < 0)
1123 BT_ERR("Failed to create RFCOMM info file");
1125 BT_INFO("RFCOMM socket layer initialized");
1130 BT_ERR("RFCOMM socket layer registration failed");
1131 proto_unregister(&rfcomm_proto);
1135 void __exit rfcomm_cleanup_sockets(void)
1137 class_remove_file(bt_class, &class_attr_rfcomm);
1139 if (bt_sock_unregister(BTPROTO_RFCOMM) < 0)
1140 BT_ERR("RFCOMM socket layer unregistration failed");
1142 proto_unregister(&rfcomm_proto);