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, see <http://www.gnu.org/licenses/>.
18 #define pr_fmt(fmt) "llcp: %s: " fmt, __func__
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/nfc.h>
24 #include <linux/sched/signal.h>
29 static int sock_wait_state(struct sock *sk, int state, unsigned long timeo)
31 DECLARE_WAITQUEUE(wait, current);
34 pr_debug("sk %p", sk);
36 add_wait_queue(sk_sleep(sk), &wait);
37 set_current_state(TASK_INTERRUPTIBLE);
39 while (sk->sk_state != state) {
45 if (signal_pending(current)) {
46 err = sock_intr_errno(timeo);
51 timeo = schedule_timeout(timeo);
53 set_current_state(TASK_INTERRUPTIBLE);
60 __set_current_state(TASK_RUNNING);
61 remove_wait_queue(sk_sleep(sk), &wait);
65 static struct proto llcp_sock_proto = {
68 .obj_size = sizeof(struct nfc_llcp_sock),
71 static int llcp_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
73 struct sock *sk = sock->sk;
74 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
75 struct nfc_llcp_local *local;
77 struct sockaddr_nfc_llcp llcp_addr;
80 if (!addr || alen < offsetofend(struct sockaddr, sa_family) ||
81 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 || alen < offsetofend(struct sockaddr, sa_family) ||
156 addr->sa_family != AF_NFC)
159 pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family);
161 memset(&llcp_addr, 0, sizeof(llcp_addr));
162 len = min_t(unsigned int, sizeof(llcp_addr), alen);
163 memcpy(&llcp_addr, addr, len);
167 if (sk->sk_state != LLCP_CLOSED) {
172 dev = nfc_get_device(llcp_addr.dev_idx);
178 local = nfc_llcp_find_local(dev);
184 llcp_sock->dev = dev;
185 llcp_sock->local = nfc_llcp_local_get(local);
186 llcp_sock->nfc_protocol = llcp_addr.nfc_protocol;
188 nfc_llcp_sock_link(&local->raw_sockets, sk);
190 sk->sk_state = LLCP_BOUND;
200 static int llcp_sock_listen(struct socket *sock, int backlog)
202 struct sock *sk = sock->sk;
205 pr_debug("sk %p backlog %d\n", sk, backlog);
209 if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) ||
210 sk->sk_state != LLCP_BOUND) {
215 sk->sk_max_ack_backlog = backlog;
216 sk->sk_ack_backlog = 0;
218 pr_debug("Socket listening\n");
219 sk->sk_state = LLCP_LISTEN;
227 static int nfc_llcp_setsockopt(struct socket *sock, int level, int optname,
228 char __user *optval, unsigned int optlen)
230 struct sock *sk = sock->sk;
231 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
235 pr_debug("%p optname %d\n", sk, optname);
237 if (level != SOL_NFC)
244 if (sk->sk_state == LLCP_CONNECTED ||
245 sk->sk_state == LLCP_BOUND ||
246 sk->sk_state == LLCP_LISTEN) {
251 if (get_user(opt, (u32 __user *) optval)) {
256 if (opt > LLCP_MAX_RW) {
261 llcp_sock->rw = (u8) opt;
266 if (sk->sk_state == LLCP_CONNECTED ||
267 sk->sk_state == LLCP_BOUND ||
268 sk->sk_state == LLCP_LISTEN) {
273 if (get_user(opt, (u32 __user *) optval)) {
278 if (opt > LLCP_MAX_MIUX) {
283 llcp_sock->miux = cpu_to_be16((u16) opt);
294 pr_debug("%p rw %d miux %d\n", llcp_sock,
295 llcp_sock->rw, llcp_sock->miux);
300 static int nfc_llcp_getsockopt(struct socket *sock, int level, int optname,
301 char __user *optval, int __user *optlen)
303 struct nfc_llcp_local *local;
304 struct sock *sk = sock->sk;
305 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
307 u16 miux, remote_miu;
310 pr_debug("%p optname %d\n", sk, optname);
312 if (level != SOL_NFC)
315 if (get_user(len, optlen))
318 local = llcp_sock->local;
322 len = min_t(u32, len, sizeof(u32));
328 rw = llcp_sock->rw > LLCP_MAX_RW ? local->rw : llcp_sock->rw;
329 if (put_user(rw, (u32 __user *) optval))
335 miux = be16_to_cpu(llcp_sock->miux) > LLCP_MAX_MIUX ?
336 be16_to_cpu(local->miux) : be16_to_cpu(llcp_sock->miux);
338 if (put_user(miux, (u32 __user *) optval))
343 case NFC_LLCP_REMOTE_MIU:
344 remote_miu = llcp_sock->remote_miu > LLCP_MAX_MIU ?
345 local->remote_miu : llcp_sock->remote_miu;
347 if (put_user(remote_miu, (u32 __user *) optval))
352 case NFC_LLCP_REMOTE_LTO:
353 if (put_user(local->remote_lto / 10, (u32 __user *) optval))
358 case NFC_LLCP_REMOTE_RW:
359 if (put_user(llcp_sock->remote_rw, (u32 __user *) optval))
371 if (put_user(len, optlen))
377 void nfc_llcp_accept_unlink(struct sock *sk)
379 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
381 pr_debug("state %d\n", sk->sk_state);
383 list_del_init(&llcp_sock->accept_queue);
384 sk_acceptq_removed(llcp_sock->parent);
385 llcp_sock->parent = NULL;
390 void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk)
392 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
393 struct nfc_llcp_sock *llcp_sock_parent = nfc_llcp_sock(parent);
395 /* Lock will be free from unlink */
398 list_add_tail(&llcp_sock->accept_queue,
399 &llcp_sock_parent->accept_queue);
400 llcp_sock->parent = parent;
401 sk_acceptq_added(parent);
404 struct sock *nfc_llcp_accept_dequeue(struct sock *parent,
405 struct socket *newsock)
407 struct nfc_llcp_sock *lsk, *n, *llcp_parent;
410 llcp_parent = nfc_llcp_sock(parent);
412 list_for_each_entry_safe(lsk, n, &llcp_parent->accept_queue,
417 if (sk->sk_state == LLCP_CLOSED) {
419 nfc_llcp_accept_unlink(sk);
423 if (sk->sk_state == LLCP_CONNECTED || !newsock) {
424 list_del_init(&lsk->accept_queue);
428 sock_graft(sk, newsock);
432 pr_debug("Returning sk state %d\n", sk->sk_state);
434 sk_acceptq_removed(parent);
445 static int llcp_sock_accept(struct socket *sock, struct socket *newsock,
446 int flags, bool kern)
448 DECLARE_WAITQUEUE(wait, current);
449 struct sock *sk = sock->sk, *new_sk;
453 pr_debug("parent %p\n", sk);
455 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
457 if (sk->sk_state != LLCP_LISTEN) {
462 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
464 /* Wait for an incoming connection. */
465 add_wait_queue_exclusive(sk_sleep(sk), &wait);
466 while (!(new_sk = nfc_llcp_accept_dequeue(sk, newsock))) {
467 set_current_state(TASK_INTERRUPTIBLE);
474 if (signal_pending(current)) {
475 ret = sock_intr_errno(timeo);
480 timeo = schedule_timeout(timeo);
481 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
483 __set_current_state(TASK_RUNNING);
484 remove_wait_queue(sk_sleep(sk), &wait);
489 newsock->state = SS_CONNECTED;
491 pr_debug("new socket %p\n", new_sk);
499 static int llcp_sock_getname(struct socket *sock, struct sockaddr *uaddr,
502 struct sock *sk = sock->sk;
503 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
504 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, llcp_addr, uaddr);
506 if (llcp_sock == NULL || llcp_sock->dev == NULL)
509 pr_debug("%p %d %d %d\n", sk, llcp_sock->target_idx,
510 llcp_sock->dsap, llcp_sock->ssap);
512 memset(llcp_addr, 0, sizeof(*llcp_addr));
515 if (!llcp_sock->dev) {
519 llcp_addr->sa_family = AF_NFC;
520 llcp_addr->dev_idx = llcp_sock->dev->idx;
521 llcp_addr->target_idx = llcp_sock->target_idx;
522 llcp_addr->nfc_protocol = llcp_sock->nfc_protocol;
523 llcp_addr->dsap = llcp_sock->dsap;
524 llcp_addr->ssap = llcp_sock->ssap;
525 llcp_addr->service_name_len = llcp_sock->service_name_len;
526 memcpy(llcp_addr->service_name, llcp_sock->service_name,
527 llcp_addr->service_name_len);
530 return sizeof(struct sockaddr_nfc_llcp);
533 static inline __poll_t llcp_accept_poll(struct sock *parent)
535 struct nfc_llcp_sock *llcp_sock, *parent_sock;
538 parent_sock = nfc_llcp_sock(parent);
540 list_for_each_entry(llcp_sock, &parent_sock->accept_queue,
544 if (sk->sk_state == LLCP_CONNECTED)
545 return EPOLLIN | EPOLLRDNORM;
551 static __poll_t llcp_sock_poll_mask(struct socket *sock, __poll_t events)
553 struct sock *sk = sock->sk;
556 pr_debug("%p\n", sk);
558 if (sk->sk_state == LLCP_LISTEN)
559 return llcp_accept_poll(sk);
561 if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
563 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
565 if (!skb_queue_empty(&sk->sk_receive_queue))
566 mask |= EPOLLIN | EPOLLRDNORM;
568 if (sk->sk_state == LLCP_CLOSED)
571 if (sk->sk_shutdown & RCV_SHUTDOWN)
572 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
574 if (sk->sk_shutdown == SHUTDOWN_MASK)
577 if (sock_writeable(sk) && sk->sk_state == LLCP_CONNECTED)
578 mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
580 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
582 pr_debug("mask 0x%x\n", mask);
587 static int llcp_sock_release(struct socket *sock)
589 struct sock *sk = sock->sk;
590 struct nfc_llcp_local *local;
591 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
597 pr_debug("%p\n", sk);
599 local = llcp_sock->local;
608 if (sk->sk_state == LLCP_CONNECTED)
609 nfc_llcp_send_disconnect(llcp_sock);
611 if (sk->sk_state == LLCP_LISTEN) {
612 struct nfc_llcp_sock *lsk, *n;
613 struct sock *accept_sk;
615 list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue,
617 accept_sk = &lsk->sk;
618 lock_sock(accept_sk);
620 nfc_llcp_send_disconnect(lsk);
621 nfc_llcp_accept_unlink(accept_sk);
623 release_sock(accept_sk);
627 if (llcp_sock->reserved_ssap < LLCP_SAP_MAX)
628 nfc_llcp_put_ssap(llcp_sock->local, llcp_sock->ssap);
632 /* Keep this sock alive and therefore do not remove it from the sockets
633 * list until the DISC PDU has been actually sent. Otherwise we would
634 * reply with DM PDUs before sending the DISC one.
636 if (sk->sk_state == LLCP_DISCONNECTING)
639 if (sock->type == SOCK_RAW)
640 nfc_llcp_sock_unlink(&local->raw_sockets, sk);
642 nfc_llcp_sock_unlink(&local->sockets, sk);
651 static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr,
654 struct sock *sk = sock->sk;
655 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
656 struct sockaddr_nfc_llcp *addr = (struct sockaddr_nfc_llcp *)_addr;
658 struct nfc_llcp_local *local;
661 pr_debug("sock %p sk %p flags 0x%x\n", sock, sk, flags);
663 if (!addr || len < sizeof(*addr) || addr->sa_family != AF_NFC)
666 if (addr->service_name_len == 0 && addr->dsap == 0)
669 pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n", addr->dev_idx,
670 addr->target_idx, addr->nfc_protocol);
674 if (sk->sk_state == LLCP_CONNECTED) {
679 dev = nfc_get_device(addr->dev_idx);
685 local = nfc_llcp_find_local(dev);
691 device_lock(&dev->dev);
692 if (dev->dep_link_up == false) {
694 device_unlock(&dev->dev);
697 device_unlock(&dev->dev);
699 if (local->rf_mode == NFC_RF_INITIATOR &&
700 addr->target_idx != local->target_idx) {
705 llcp_sock->dev = dev;
706 llcp_sock->local = nfc_llcp_local_get(local);
707 llcp_sock->ssap = nfc_llcp_get_local_ssap(local);
708 if (llcp_sock->ssap == LLCP_SAP_MAX) {
713 llcp_sock->reserved_ssap = llcp_sock->ssap;
715 if (addr->service_name_len == 0)
716 llcp_sock->dsap = addr->dsap;
718 llcp_sock->dsap = LLCP_SAP_SDP;
719 llcp_sock->nfc_protocol = addr->nfc_protocol;
720 llcp_sock->service_name_len = min_t(unsigned int,
721 addr->service_name_len,
722 NFC_LLCP_MAX_SERVICE_NAME);
723 llcp_sock->service_name = kmemdup(addr->service_name,
724 llcp_sock->service_name_len,
727 nfc_llcp_sock_link(&local->connecting_sockets, sk);
729 ret = nfc_llcp_send_connect(llcp_sock);
733 sk->sk_state = LLCP_CONNECTING;
735 ret = sock_wait_state(sk, LLCP_CONNECTED,
736 sock_sndtimeo(sk, flags & O_NONBLOCK));
737 if (ret && ret != -EINPROGRESS)
745 nfc_llcp_put_ssap(local, llcp_sock->ssap);
747 nfc_llcp_sock_unlink(&local->connecting_sockets, sk);
757 static int llcp_sock_sendmsg(struct socket *sock, struct msghdr *msg,
760 struct sock *sk = sock->sk;
761 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
764 pr_debug("sock %p sk %p", sock, sk);
766 ret = sock_error(sk);
770 if (msg->msg_flags & MSG_OOB)
775 if (sk->sk_type == SOCK_DGRAM) {
776 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, addr,
779 if (msg->msg_namelen < sizeof(*addr)) {
786 return nfc_llcp_send_ui_frame(llcp_sock, addr->dsap, addr->ssap,
790 if (sk->sk_state != LLCP_CONNECTED) {
797 return nfc_llcp_send_i_frame(llcp_sock, msg, len);
800 static int llcp_sock_recvmsg(struct socket *sock, struct msghdr *msg,
801 size_t len, int flags)
803 int noblock = flags & MSG_DONTWAIT;
804 struct sock *sk = sock->sk;
805 unsigned int copied, rlen;
806 struct sk_buff *skb, *cskb;
809 pr_debug("%p %zu\n", sk, len);
813 if (sk->sk_state == LLCP_CLOSED &&
814 skb_queue_empty(&sk->sk_receive_queue)) {
821 if (flags & (MSG_OOB))
824 skb = skb_recv_datagram(sk, flags, noblock, &err);
826 pr_err("Recv datagram failed state %d %d %d",
827 sk->sk_state, err, sock_error(sk));
829 if (sk->sk_shutdown & RCV_SHUTDOWN)
835 rlen = skb->len; /* real length of skb */
836 copied = min_t(unsigned int, rlen, len);
839 if (skb_copy_datagram_msg(cskb, 0, msg, copied)) {
840 if (!(flags & MSG_PEEK))
841 skb_queue_head(&sk->sk_receive_queue, skb);
845 sock_recv_timestamp(msg, sk, skb);
847 if (sk->sk_type == SOCK_DGRAM && msg->msg_name) {
848 struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb);
849 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, sockaddr,
852 msg->msg_namelen = sizeof(struct sockaddr_nfc_llcp);
854 pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
856 memset(sockaddr, 0, sizeof(*sockaddr));
857 sockaddr->sa_family = AF_NFC;
858 sockaddr->nfc_protocol = NFC_PROTO_NFC_DEP;
859 sockaddr->dsap = ui_cb->dsap;
860 sockaddr->ssap = ui_cb->ssap;
863 /* Mark read part of skb as used */
864 if (!(flags & MSG_PEEK)) {
866 /* SOCK_STREAM: re-queue skb if it contains unreceived data */
867 if (sk->sk_type == SOCK_STREAM ||
868 sk->sk_type == SOCK_DGRAM ||
869 sk->sk_type == SOCK_RAW) {
870 skb_pull(skb, copied);
872 skb_queue_head(&sk->sk_receive_queue, skb);
880 /* XXX Queue backlogged skbs */
883 /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */
884 if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC))
890 static const struct proto_ops llcp_sock_ops = {
892 .owner = THIS_MODULE,
893 .bind = llcp_sock_bind,
894 .connect = llcp_sock_connect,
895 .release = llcp_sock_release,
896 .socketpair = sock_no_socketpair,
897 .accept = llcp_sock_accept,
898 .getname = llcp_sock_getname,
899 .poll_mask = llcp_sock_poll_mask,
900 .ioctl = sock_no_ioctl,
901 .listen = llcp_sock_listen,
902 .shutdown = sock_no_shutdown,
903 .setsockopt = nfc_llcp_setsockopt,
904 .getsockopt = nfc_llcp_getsockopt,
905 .sendmsg = llcp_sock_sendmsg,
906 .recvmsg = llcp_sock_recvmsg,
907 .mmap = sock_no_mmap,
910 static const struct proto_ops llcp_rawsock_ops = {
912 .owner = THIS_MODULE,
913 .bind = llcp_raw_sock_bind,
914 .connect = sock_no_connect,
915 .release = llcp_sock_release,
916 .socketpair = sock_no_socketpair,
917 .accept = sock_no_accept,
918 .getname = llcp_sock_getname,
919 .poll_mask = llcp_sock_poll_mask,
920 .ioctl = sock_no_ioctl,
921 .listen = sock_no_listen,
922 .shutdown = sock_no_shutdown,
923 .setsockopt = sock_no_setsockopt,
924 .getsockopt = sock_no_getsockopt,
925 .sendmsg = sock_no_sendmsg,
926 .recvmsg = llcp_sock_recvmsg,
927 .mmap = sock_no_mmap,
930 static void llcp_sock_destruct(struct sock *sk)
932 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
934 pr_debug("%p\n", sk);
936 if (sk->sk_state == LLCP_CONNECTED)
937 nfc_put_device(llcp_sock->dev);
939 skb_queue_purge(&sk->sk_receive_queue);
941 nfc_llcp_sock_free(llcp_sock);
943 if (!sock_flag(sk, SOCK_DEAD)) {
944 pr_err("Freeing alive NFC LLCP socket %p\n", sk);
949 struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern)
952 struct nfc_llcp_sock *llcp_sock;
954 sk = sk_alloc(&init_net, PF_NFC, gfp, &llcp_sock_proto, kern);
958 llcp_sock = nfc_llcp_sock(sk);
960 sock_init_data(sock, sk);
961 sk->sk_state = LLCP_CLOSED;
962 sk->sk_protocol = NFC_SOCKPROTO_LLCP;
964 sk->sk_destruct = llcp_sock_destruct;
967 llcp_sock->dsap = LLCP_SAP_SDP;
968 llcp_sock->rw = LLCP_MAX_RW + 1;
969 llcp_sock->miux = cpu_to_be16(LLCP_MAX_MIUX + 1);
970 llcp_sock->send_n = llcp_sock->send_ack_n = 0;
971 llcp_sock->recv_n = llcp_sock->recv_ack_n = 0;
972 llcp_sock->remote_ready = 1;
973 llcp_sock->reserved_ssap = LLCP_SAP_MAX;
974 nfc_llcp_socket_remote_param_init(llcp_sock);
975 skb_queue_head_init(&llcp_sock->tx_queue);
976 skb_queue_head_init(&llcp_sock->tx_pending_queue);
977 INIT_LIST_HEAD(&llcp_sock->accept_queue);
980 sock->state = SS_UNCONNECTED;
985 void nfc_llcp_sock_free(struct nfc_llcp_sock *sock)
987 kfree(sock->service_name);
989 skb_queue_purge(&sock->tx_queue);
990 skb_queue_purge(&sock->tx_pending_queue);
992 list_del_init(&sock->accept_queue);
996 nfc_llcp_local_put(sock->local);
999 static int llcp_sock_create(struct net *net, struct socket *sock,
1000 const struct nfc_protocol *nfc_proto, int kern)
1004 pr_debug("%p\n", sock);
1006 if (sock->type != SOCK_STREAM &&
1007 sock->type != SOCK_DGRAM &&
1008 sock->type != SOCK_RAW)
1009 return -ESOCKTNOSUPPORT;
1011 if (sock->type == SOCK_RAW)
1012 sock->ops = &llcp_rawsock_ops;
1014 sock->ops = &llcp_sock_ops;
1016 sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC, kern);
1023 static const struct nfc_protocol llcp_nfc_proto = {
1024 .id = NFC_SOCKPROTO_LLCP,
1025 .proto = &llcp_sock_proto,
1026 .owner = THIS_MODULE,
1027 .create = llcp_sock_create
1030 int __init nfc_llcp_sock_init(void)
1032 return nfc_proto_register(&llcp_nfc_proto);
1035 void nfc_llcp_sock_exit(void)
1037 nfc_proto_unregister(&llcp_nfc_proto);