2 * Copyright (C) 2011 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the
16 * Free Software Foundation, Inc.,
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 #define pr_fmt(fmt) "llcp: %s: " fmt, __func__
22 #include <linux/init.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/nfc.h>
30 static int sock_wait_state(struct sock
*sk
, int state
, unsigned long timeo
)
32 DECLARE_WAITQUEUE(wait
, current
);
35 pr_debug("sk %p", sk
);
37 add_wait_queue(sk_sleep(sk
), &wait
);
38 set_current_state(TASK_INTERRUPTIBLE
);
40 while (sk
->sk_state
!= state
) {
46 if (signal_pending(current
)) {
47 err
= sock_intr_errno(timeo
);
52 timeo
= schedule_timeout(timeo
);
54 set_current_state(TASK_INTERRUPTIBLE
);
61 __set_current_state(TASK_RUNNING
);
62 remove_wait_queue(sk_sleep(sk
), &wait
);
66 static struct proto llcp_sock_proto
= {
69 .obj_size
= sizeof(struct nfc_llcp_sock
),
72 static int llcp_sock_bind(struct socket
*sock
, struct sockaddr
*addr
, int alen
)
74 struct sock
*sk
= sock
->sk
;
75 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
76 struct nfc_llcp_local
*local
;
78 struct sockaddr_nfc_llcp llcp_addr
;
81 if (!addr
|| addr
->sa_family
!= AF_NFC
)
84 pr_debug("sk %p addr %p family %d\n", sk
, addr
, addr
->sa_family
);
86 memset(&llcp_addr
, 0, sizeof(llcp_addr
));
87 len
= min_t(unsigned int, sizeof(llcp_addr
), alen
);
88 memcpy(&llcp_addr
, addr
, len
);
90 /* This is going to be a listening socket, dsap must be 0 */
91 if (llcp_addr
.dsap
!= 0)
96 if (sk
->sk_state
!= LLCP_CLOSED
) {
101 dev
= nfc_get_device(llcp_addr
.dev_idx
);
107 local
= nfc_llcp_find_local(dev
);
113 llcp_sock
->dev
= dev
;
114 llcp_sock
->local
= nfc_llcp_local_get(local
);
115 llcp_sock
->nfc_protocol
= llcp_addr
.nfc_protocol
;
116 llcp_sock
->service_name_len
= min_t(unsigned int,
117 llcp_addr
.service_name_len
,
118 NFC_LLCP_MAX_SERVICE_NAME
);
119 llcp_sock
->service_name
= kmemdup(llcp_addr
.service_name
,
120 llcp_sock
->service_name_len
,
123 llcp_sock
->ssap
= nfc_llcp_get_sdp_ssap(local
, llcp_sock
);
124 if (llcp_sock
->ssap
== LLCP_SAP_MAX
) {
129 llcp_sock
->reserved_ssap
= llcp_sock
->ssap
;
131 nfc_llcp_sock_link(&local
->sockets
, sk
);
133 pr_debug("Socket bound to SAP %d\n", llcp_sock
->ssap
);
135 sk
->sk_state
= LLCP_BOUND
;
145 static int llcp_raw_sock_bind(struct socket
*sock
, struct sockaddr
*addr
,
148 struct sock
*sk
= sock
->sk
;
149 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
150 struct nfc_llcp_local
*local
;
152 struct sockaddr_nfc_llcp llcp_addr
;
155 if (!addr
|| addr
->sa_family
!= AF_NFC
)
158 pr_debug("sk %p addr %p family %d\n", sk
, addr
, addr
->sa_family
);
160 memset(&llcp_addr
, 0, sizeof(llcp_addr
));
161 len
= min_t(unsigned int, sizeof(llcp_addr
), alen
);
162 memcpy(&llcp_addr
, addr
, len
);
166 if (sk
->sk_state
!= LLCP_CLOSED
) {
171 dev
= nfc_get_device(llcp_addr
.dev_idx
);
177 local
= nfc_llcp_find_local(dev
);
183 llcp_sock
->dev
= dev
;
184 llcp_sock
->local
= nfc_llcp_local_get(local
);
185 llcp_sock
->nfc_protocol
= llcp_addr
.nfc_protocol
;
187 nfc_llcp_sock_link(&local
->raw_sockets
, sk
);
189 sk
->sk_state
= LLCP_BOUND
;
199 static int llcp_sock_listen(struct socket
*sock
, int backlog
)
201 struct sock
*sk
= sock
->sk
;
204 pr_debug("sk %p backlog %d\n", sk
, backlog
);
208 if ((sock
->type
!= SOCK_SEQPACKET
&& sock
->type
!= SOCK_STREAM
) ||
209 sk
->sk_state
!= LLCP_BOUND
) {
214 sk
->sk_max_ack_backlog
= backlog
;
215 sk
->sk_ack_backlog
= 0;
217 pr_debug("Socket listening\n");
218 sk
->sk_state
= LLCP_LISTEN
;
226 void nfc_llcp_accept_unlink(struct sock
*sk
)
228 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
230 pr_debug("state %d\n", sk
->sk_state
);
232 list_del_init(&llcp_sock
->accept_queue
);
233 sk_acceptq_removed(llcp_sock
->parent
);
234 llcp_sock
->parent
= NULL
;
239 void nfc_llcp_accept_enqueue(struct sock
*parent
, struct sock
*sk
)
241 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
242 struct nfc_llcp_sock
*llcp_sock_parent
= nfc_llcp_sock(parent
);
244 /* Lock will be free from unlink */
247 list_add_tail(&llcp_sock
->accept_queue
,
248 &llcp_sock_parent
->accept_queue
);
249 llcp_sock
->parent
= parent
;
250 sk_acceptq_added(parent
);
253 struct sock
*nfc_llcp_accept_dequeue(struct sock
*parent
,
254 struct socket
*newsock
)
256 struct nfc_llcp_sock
*lsk
, *n
, *llcp_parent
;
259 llcp_parent
= nfc_llcp_sock(parent
);
261 list_for_each_entry_safe(lsk
, n
, &llcp_parent
->accept_queue
,
266 if (sk
->sk_state
== LLCP_CLOSED
) {
268 nfc_llcp_accept_unlink(sk
);
272 if (sk
->sk_state
== LLCP_CONNECTED
|| !newsock
) {
273 list_del_init(&lsk
->accept_queue
);
277 sock_graft(sk
, newsock
);
281 pr_debug("Returning sk state %d\n", sk
->sk_state
);
283 sk_acceptq_removed(parent
);
294 static int llcp_sock_accept(struct socket
*sock
, struct socket
*newsock
,
297 DECLARE_WAITQUEUE(wait
, current
);
298 struct sock
*sk
= sock
->sk
, *new_sk
;
302 pr_debug("parent %p\n", sk
);
304 lock_sock_nested(sk
, SINGLE_DEPTH_NESTING
);
306 if (sk
->sk_state
!= LLCP_LISTEN
) {
311 timeo
= sock_rcvtimeo(sk
, flags
& O_NONBLOCK
);
313 /* Wait for an incoming connection. */
314 add_wait_queue_exclusive(sk_sleep(sk
), &wait
);
315 while (!(new_sk
= nfc_llcp_accept_dequeue(sk
, newsock
))) {
316 set_current_state(TASK_INTERRUPTIBLE
);
323 if (signal_pending(current
)) {
324 ret
= sock_intr_errno(timeo
);
329 timeo
= schedule_timeout(timeo
);
330 lock_sock_nested(sk
, SINGLE_DEPTH_NESTING
);
332 __set_current_state(TASK_RUNNING
);
333 remove_wait_queue(sk_sleep(sk
), &wait
);
338 newsock
->state
= SS_CONNECTED
;
340 pr_debug("new socket %p\n", new_sk
);
348 static int llcp_sock_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
351 struct sock
*sk
= sock
->sk
;
352 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
353 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp
*, llcp_addr
, uaddr
);
355 if (llcp_sock
== NULL
|| llcp_sock
->dev
== NULL
)
358 pr_debug("%p %d %d %d\n", sk
, llcp_sock
->target_idx
,
359 llcp_sock
->dsap
, llcp_sock
->ssap
);
361 uaddr
->sa_family
= AF_NFC
;
363 *len
= sizeof(struct sockaddr_nfc_llcp
);
365 llcp_addr
->dev_idx
= llcp_sock
->dev
->idx
;
366 llcp_addr
->target_idx
= llcp_sock
->target_idx
;
367 llcp_addr
->dsap
= llcp_sock
->dsap
;
368 llcp_addr
->ssap
= llcp_sock
->ssap
;
369 llcp_addr
->service_name_len
= llcp_sock
->service_name_len
;
370 memcpy(llcp_addr
->service_name
, llcp_sock
->service_name
,
371 llcp_addr
->service_name_len
);
376 static inline unsigned int llcp_accept_poll(struct sock
*parent
)
378 struct nfc_llcp_sock
*llcp_sock
, *n
, *parent_sock
;
381 parent_sock
= nfc_llcp_sock(parent
);
383 list_for_each_entry_safe(llcp_sock
, n
, &parent_sock
->accept_queue
,
387 if (sk
->sk_state
== LLCP_CONNECTED
)
388 return POLLIN
| POLLRDNORM
;
394 static unsigned int llcp_sock_poll(struct file
*file
, struct socket
*sock
,
397 struct sock
*sk
= sock
->sk
;
398 unsigned int mask
= 0;
400 pr_debug("%p\n", sk
);
402 sock_poll_wait(file
, sk_sleep(sk
), wait
);
404 if (sk
->sk_state
== LLCP_LISTEN
)
405 return llcp_accept_poll(sk
);
407 if (sk
->sk_err
|| !skb_queue_empty(&sk
->sk_error_queue
))
410 if (!skb_queue_empty(&sk
->sk_receive_queue
))
411 mask
|= POLLIN
| POLLRDNORM
;
413 if (sk
->sk_state
== LLCP_CLOSED
)
416 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
417 mask
|= POLLRDHUP
| POLLIN
| POLLRDNORM
;
419 if (sk
->sk_shutdown
== SHUTDOWN_MASK
)
422 if (sock_writeable(sk
))
423 mask
|= POLLOUT
| POLLWRNORM
| POLLWRBAND
;
425 set_bit(SOCK_ASYNC_NOSPACE
, &sk
->sk_socket
->flags
);
427 pr_debug("mask 0x%x\n", mask
);
432 static int llcp_sock_release(struct socket
*sock
)
434 struct sock
*sk
= sock
->sk
;
435 struct nfc_llcp_local
*local
;
436 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
442 pr_debug("%p\n", sk
);
444 local
= llcp_sock
->local
;
453 if (sk
->sk_state
== LLCP_CONNECTED
)
454 nfc_llcp_disconnect(llcp_sock
);
456 if (sk
->sk_state
== LLCP_LISTEN
) {
457 struct nfc_llcp_sock
*lsk
, *n
;
458 struct sock
*accept_sk
;
460 list_for_each_entry_safe(lsk
, n
, &llcp_sock
->accept_queue
,
462 accept_sk
= &lsk
->sk
;
463 lock_sock(accept_sk
);
465 nfc_llcp_disconnect(lsk
);
466 nfc_llcp_accept_unlink(accept_sk
);
468 release_sock(accept_sk
);
472 if (llcp_sock
->reserved_ssap
< LLCP_SAP_MAX
)
473 nfc_llcp_put_ssap(llcp_sock
->local
, llcp_sock
->ssap
);
477 if (sock
->type
== SOCK_RAW
)
478 nfc_llcp_sock_unlink(&local
->raw_sockets
, sk
);
480 nfc_llcp_sock_unlink(&local
->sockets
, sk
);
489 static int llcp_sock_connect(struct socket
*sock
, struct sockaddr
*_addr
,
492 struct sock
*sk
= sock
->sk
;
493 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
494 struct sockaddr_nfc_llcp
*addr
= (struct sockaddr_nfc_llcp
*)_addr
;
496 struct nfc_llcp_local
*local
;
499 pr_debug("sock %p sk %p flags 0x%x\n", sock
, sk
, flags
);
501 if (!addr
|| len
< sizeof(struct sockaddr_nfc
) ||
502 addr
->sa_family
!= AF_NFC
)
505 if (addr
->service_name_len
== 0 && addr
->dsap
== 0)
508 pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n", addr
->dev_idx
,
509 addr
->target_idx
, addr
->nfc_protocol
);
513 if (sk
->sk_state
== LLCP_CONNECTED
) {
518 dev
= nfc_get_device(addr
->dev_idx
);
524 local
= nfc_llcp_find_local(dev
);
530 device_lock(&dev
->dev
);
531 if (dev
->dep_link_up
== false) {
533 device_unlock(&dev
->dev
);
536 device_unlock(&dev
->dev
);
538 if (local
->rf_mode
== NFC_RF_INITIATOR
&&
539 addr
->target_idx
!= local
->target_idx
) {
544 llcp_sock
->dev
= dev
;
545 llcp_sock
->local
= nfc_llcp_local_get(local
);
546 llcp_sock
->miu
= llcp_sock
->local
->remote_miu
;
547 llcp_sock
->ssap
= nfc_llcp_get_local_ssap(local
);
548 if (llcp_sock
->ssap
== LLCP_SAP_MAX
) {
553 llcp_sock
->reserved_ssap
= llcp_sock
->ssap
;
555 if (addr
->service_name_len
== 0)
556 llcp_sock
->dsap
= addr
->dsap
;
558 llcp_sock
->dsap
= LLCP_SAP_SDP
;
559 llcp_sock
->nfc_protocol
= addr
->nfc_protocol
;
560 llcp_sock
->service_name_len
= min_t(unsigned int,
561 addr
->service_name_len
,
562 NFC_LLCP_MAX_SERVICE_NAME
);
563 llcp_sock
->service_name
= kmemdup(addr
->service_name
,
564 llcp_sock
->service_name_len
,
567 nfc_llcp_sock_link(&local
->connecting_sockets
, sk
);
569 ret
= nfc_llcp_send_connect(llcp_sock
);
573 ret
= sock_wait_state(sk
, LLCP_CONNECTED
,
574 sock_sndtimeo(sk
, flags
& O_NONBLOCK
));
583 nfc_llcp_put_ssap(local
, llcp_sock
->ssap
);
585 nfc_llcp_sock_unlink(&local
->connecting_sockets
, sk
);
595 static int llcp_sock_sendmsg(struct kiocb
*iocb
, struct socket
*sock
,
596 struct msghdr
*msg
, size_t len
)
598 struct sock
*sk
= sock
->sk
;
599 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
602 pr_debug("sock %p sk %p", sock
, sk
);
604 ret
= sock_error(sk
);
608 if (msg
->msg_flags
& MSG_OOB
)
613 if (sk
->sk_type
== SOCK_DGRAM
) {
614 struct sockaddr_nfc_llcp
*addr
=
615 (struct sockaddr_nfc_llcp
*)msg
->msg_name
;
617 if (msg
->msg_namelen
< sizeof(*addr
)) {
624 return nfc_llcp_send_ui_frame(llcp_sock
, addr
->dsap
, addr
->ssap
,
628 if (sk
->sk_state
!= LLCP_CONNECTED
) {
635 return nfc_llcp_send_i_frame(llcp_sock
, msg
, len
);
638 static int llcp_sock_recvmsg(struct kiocb
*iocb
, struct socket
*sock
,
639 struct msghdr
*msg
, size_t len
, int flags
)
641 int noblock
= flags
& MSG_DONTWAIT
;
642 struct sock
*sk
= sock
->sk
;
643 unsigned int copied
, rlen
;
644 struct sk_buff
*skb
, *cskb
;
647 pr_debug("%p %zu\n", sk
, len
);
649 msg
->msg_namelen
= 0;
653 if (sk
->sk_state
== LLCP_CLOSED
&&
654 skb_queue_empty(&sk
->sk_receive_queue
)) {
661 if (flags
& (MSG_OOB
))
664 skb
= skb_recv_datagram(sk
, flags
, noblock
, &err
);
666 pr_err("Recv datagram failed state %d %d %d",
667 sk
->sk_state
, err
, sock_error(sk
));
669 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
675 rlen
= skb
->len
; /* real length of skb */
676 copied
= min_t(unsigned int, rlen
, len
);
679 if (skb_copy_datagram_iovec(cskb
, 0, msg
->msg_iov
, copied
)) {
680 if (!(flags
& MSG_PEEK
))
681 skb_queue_head(&sk
->sk_receive_queue
, skb
);
685 sock_recv_timestamp(msg
, sk
, skb
);
687 if (sk
->sk_type
== SOCK_DGRAM
&& msg
->msg_name
) {
688 struct nfc_llcp_ui_cb
*ui_cb
= nfc_llcp_ui_skb_cb(skb
);
689 struct sockaddr_nfc_llcp
*sockaddr
=
690 (struct sockaddr_nfc_llcp
*) msg
->msg_name
;
692 msg
->msg_namelen
= sizeof(struct sockaddr_nfc_llcp
);
694 pr_debug("Datagram socket %d %d\n", ui_cb
->dsap
, ui_cb
->ssap
);
696 memset(sockaddr
, 0, sizeof(*sockaddr
));
697 sockaddr
->sa_family
= AF_NFC
;
698 sockaddr
->nfc_protocol
= NFC_PROTO_NFC_DEP
;
699 sockaddr
->dsap
= ui_cb
->dsap
;
700 sockaddr
->ssap
= ui_cb
->ssap
;
703 /* Mark read part of skb as used */
704 if (!(flags
& MSG_PEEK
)) {
706 /* SOCK_STREAM: re-queue skb if it contains unreceived data */
707 if (sk
->sk_type
== SOCK_STREAM
||
708 sk
->sk_type
== SOCK_DGRAM
||
709 sk
->sk_type
== SOCK_RAW
) {
710 skb_pull(skb
, copied
);
712 skb_queue_head(&sk
->sk_receive_queue
, skb
);
720 /* XXX Queue backlogged skbs */
723 /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */
724 if (sk
->sk_type
== SOCK_SEQPACKET
&& (flags
& MSG_TRUNC
))
730 static const struct proto_ops llcp_sock_ops
= {
732 .owner
= THIS_MODULE
,
733 .bind
= llcp_sock_bind
,
734 .connect
= llcp_sock_connect
,
735 .release
= llcp_sock_release
,
736 .socketpair
= sock_no_socketpair
,
737 .accept
= llcp_sock_accept
,
738 .getname
= llcp_sock_getname
,
739 .poll
= llcp_sock_poll
,
740 .ioctl
= sock_no_ioctl
,
741 .listen
= llcp_sock_listen
,
742 .shutdown
= sock_no_shutdown
,
743 .setsockopt
= sock_no_setsockopt
,
744 .getsockopt
= sock_no_getsockopt
,
745 .sendmsg
= llcp_sock_sendmsg
,
746 .recvmsg
= llcp_sock_recvmsg
,
747 .mmap
= sock_no_mmap
,
750 static const struct proto_ops llcp_rawsock_ops
= {
752 .owner
= THIS_MODULE
,
753 .bind
= llcp_raw_sock_bind
,
754 .connect
= sock_no_connect
,
755 .release
= llcp_sock_release
,
756 .socketpair
= sock_no_socketpair
,
757 .accept
= sock_no_accept
,
758 .getname
= llcp_sock_getname
,
759 .poll
= llcp_sock_poll
,
760 .ioctl
= sock_no_ioctl
,
761 .listen
= sock_no_listen
,
762 .shutdown
= sock_no_shutdown
,
763 .setsockopt
= sock_no_setsockopt
,
764 .getsockopt
= sock_no_getsockopt
,
765 .sendmsg
= sock_no_sendmsg
,
766 .recvmsg
= llcp_sock_recvmsg
,
767 .mmap
= sock_no_mmap
,
770 static void llcp_sock_destruct(struct sock
*sk
)
772 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
774 pr_debug("%p\n", sk
);
776 if (sk
->sk_state
== LLCP_CONNECTED
)
777 nfc_put_device(llcp_sock
->dev
);
779 skb_queue_purge(&sk
->sk_receive_queue
);
781 nfc_llcp_sock_free(llcp_sock
);
783 if (!sock_flag(sk
, SOCK_DEAD
)) {
784 pr_err("Freeing alive NFC LLCP socket %p\n", sk
);
789 struct sock
*nfc_llcp_sock_alloc(struct socket
*sock
, int type
, gfp_t gfp
)
792 struct nfc_llcp_sock
*llcp_sock
;
794 sk
= sk_alloc(&init_net
, PF_NFC
, gfp
, &llcp_sock_proto
);
798 llcp_sock
= nfc_llcp_sock(sk
);
800 sock_init_data(sock
, sk
);
801 sk
->sk_state
= LLCP_CLOSED
;
802 sk
->sk_protocol
= NFC_SOCKPROTO_LLCP
;
804 sk
->sk_destruct
= llcp_sock_destruct
;
807 llcp_sock
->dsap
= LLCP_SAP_SDP
;
808 llcp_sock
->rw
= LLCP_DEFAULT_RW
;
809 llcp_sock
->miu
= LLCP_DEFAULT_MIU
;
810 llcp_sock
->send_n
= llcp_sock
->send_ack_n
= 0;
811 llcp_sock
->recv_n
= llcp_sock
->recv_ack_n
= 0;
812 llcp_sock
->remote_ready
= 1;
813 llcp_sock
->reserved_ssap
= LLCP_SAP_MAX
;
814 skb_queue_head_init(&llcp_sock
->tx_queue
);
815 skb_queue_head_init(&llcp_sock
->tx_pending_queue
);
816 INIT_LIST_HEAD(&llcp_sock
->accept_queue
);
819 sock
->state
= SS_UNCONNECTED
;
824 void nfc_llcp_sock_free(struct nfc_llcp_sock
*sock
)
826 kfree(sock
->service_name
);
828 skb_queue_purge(&sock
->tx_queue
);
829 skb_queue_purge(&sock
->tx_pending_queue
);
831 list_del_init(&sock
->accept_queue
);
835 nfc_llcp_local_put(sock
->local
);
838 static int llcp_sock_create(struct net
*net
, struct socket
*sock
,
839 const struct nfc_protocol
*nfc_proto
)
843 pr_debug("%p\n", sock
);
845 if (sock
->type
!= SOCK_STREAM
&&
846 sock
->type
!= SOCK_DGRAM
&&
847 sock
->type
!= SOCK_RAW
)
848 return -ESOCKTNOSUPPORT
;
850 if (sock
->type
== SOCK_RAW
)
851 sock
->ops
= &llcp_rawsock_ops
;
853 sock
->ops
= &llcp_sock_ops
;
855 sk
= nfc_llcp_sock_alloc(sock
, sock
->type
, GFP_ATOMIC
);
862 static const struct nfc_protocol llcp_nfc_proto
= {
863 .id
= NFC_SOCKPROTO_LLCP
,
864 .proto
= &llcp_sock_proto
,
865 .owner
= THIS_MODULE
,
866 .create
= llcp_sock_create
869 int __init
nfc_llcp_sock_init(void)
871 return nfc_proto_register(&llcp_nfc_proto
);
874 void nfc_llcp_sock_exit(void)
876 nfc_proto_unregister(&llcp_nfc_proto
);