1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2011 Intel Corporation. All rights reserved.
6 #define pr_fmt(fmt) "llcp: %s: " fmt, __func__
8 #include <linux/init.h>
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/nfc.h>
12 #include <linux/sched/signal.h>
17 static int sock_wait_state(struct sock *sk, int state, unsigned long timeo)
19 DECLARE_WAITQUEUE(wait, current);
22 pr_debug("sk %p", sk);
24 add_wait_queue(sk_sleep(sk), &wait);
25 set_current_state(TASK_INTERRUPTIBLE);
27 while (sk->sk_state != state) {
33 if (signal_pending(current)) {
34 err = sock_intr_errno(timeo);
39 timeo = schedule_timeout(timeo);
41 set_current_state(TASK_INTERRUPTIBLE);
48 __set_current_state(TASK_RUNNING);
49 remove_wait_queue(sk_sleep(sk), &wait);
53 static struct proto llcp_sock_proto = {
56 .obj_size = sizeof(struct nfc_llcp_sock),
59 static int llcp_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
61 struct sock *sk = sock->sk;
62 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
63 struct nfc_llcp_local *local;
65 struct sockaddr_nfc_llcp llcp_addr;
68 if (!addr || alen < offsetofend(struct sockaddr, sa_family) ||
69 addr->sa_family != AF_NFC)
72 pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family);
74 memset(&llcp_addr, 0, sizeof(llcp_addr));
75 len = min_t(unsigned int, sizeof(llcp_addr), alen);
76 memcpy(&llcp_addr, addr, len);
78 /* This is going to be a listening socket, dsap must be 0 */
79 if (llcp_addr.dsap != 0)
84 if (sk->sk_state != LLCP_CLOSED) {
89 dev = nfc_get_device(llcp_addr.dev_idx);
95 local = nfc_llcp_find_local(dev);
101 llcp_sock->dev = dev;
102 llcp_sock->local = nfc_llcp_local_get(local);
103 llcp_sock->nfc_protocol = llcp_addr.nfc_protocol;
104 llcp_sock->service_name_len = min_t(unsigned int,
105 llcp_addr.service_name_len,
106 NFC_LLCP_MAX_SERVICE_NAME);
107 llcp_sock->service_name = kmemdup(llcp_addr.service_name,
108 llcp_sock->service_name_len,
110 if (!llcp_sock->service_name) {
111 nfc_llcp_local_put(llcp_sock->local);
115 llcp_sock->ssap = nfc_llcp_get_sdp_ssap(local, llcp_sock);
116 if (llcp_sock->ssap == LLCP_SAP_MAX) {
117 nfc_llcp_local_put(llcp_sock->local);
118 kfree(llcp_sock->service_name);
119 llcp_sock->service_name = NULL;
124 llcp_sock->reserved_ssap = llcp_sock->ssap;
126 nfc_llcp_sock_link(&local->sockets, sk);
128 pr_debug("Socket bound to SAP %d\n", llcp_sock->ssap);
130 sk->sk_state = LLCP_BOUND;
140 static int llcp_raw_sock_bind(struct socket *sock, struct sockaddr *addr,
143 struct sock *sk = sock->sk;
144 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
145 struct nfc_llcp_local *local;
147 struct sockaddr_nfc_llcp llcp_addr;
150 if (!addr || alen < offsetofend(struct sockaddr, sa_family) ||
151 addr->sa_family != AF_NFC)
154 pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family);
156 memset(&llcp_addr, 0, sizeof(llcp_addr));
157 len = min_t(unsigned int, sizeof(llcp_addr), alen);
158 memcpy(&llcp_addr, addr, len);
162 if (sk->sk_state != LLCP_CLOSED) {
167 dev = nfc_get_device(llcp_addr.dev_idx);
173 local = nfc_llcp_find_local(dev);
179 llcp_sock->dev = dev;
180 llcp_sock->local = nfc_llcp_local_get(local);
181 llcp_sock->nfc_protocol = llcp_addr.nfc_protocol;
183 nfc_llcp_sock_link(&local->raw_sockets, sk);
185 sk->sk_state = LLCP_BOUND;
195 static int llcp_sock_listen(struct socket *sock, int backlog)
197 struct sock *sk = sock->sk;
200 pr_debug("sk %p backlog %d\n", sk, backlog);
204 if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) ||
205 sk->sk_state != LLCP_BOUND) {
210 sk->sk_max_ack_backlog = backlog;
211 sk->sk_ack_backlog = 0;
213 pr_debug("Socket listening\n");
214 sk->sk_state = LLCP_LISTEN;
222 static int nfc_llcp_setsockopt(struct socket *sock, int level, int optname,
223 sockptr_t optval, unsigned int optlen)
225 struct sock *sk = sock->sk;
226 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
230 pr_debug("%p optname %d\n", sk, optname);
232 if (level != SOL_NFC)
239 if (sk->sk_state == LLCP_CONNECTED ||
240 sk->sk_state == LLCP_BOUND ||
241 sk->sk_state == LLCP_LISTEN) {
246 if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
251 if (opt > LLCP_MAX_RW) {
256 llcp_sock->rw = (u8) opt;
261 if (sk->sk_state == LLCP_CONNECTED ||
262 sk->sk_state == LLCP_BOUND ||
263 sk->sk_state == LLCP_LISTEN) {
268 if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
273 if (opt > LLCP_MAX_MIUX) {
278 llcp_sock->miux = cpu_to_be16((u16) opt);
289 pr_debug("%p rw %d miux %d\n", llcp_sock,
290 llcp_sock->rw, llcp_sock->miux);
295 static int nfc_llcp_getsockopt(struct socket *sock, int level, int optname,
296 char __user *optval, int __user *optlen)
298 struct nfc_llcp_local *local;
299 struct sock *sk = sock->sk;
300 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
302 u16 miux, remote_miu;
305 pr_debug("%p optname %d\n", sk, optname);
307 if (level != SOL_NFC)
310 if (get_user(len, optlen))
313 local = llcp_sock->local;
317 len = min_t(u32, len, sizeof(u32));
323 rw = llcp_sock->rw > LLCP_MAX_RW ? local->rw : llcp_sock->rw;
324 if (put_user(rw, (u32 __user *) optval))
330 miux = be16_to_cpu(llcp_sock->miux) > LLCP_MAX_MIUX ?
331 be16_to_cpu(local->miux) : be16_to_cpu(llcp_sock->miux);
333 if (put_user(miux, (u32 __user *) optval))
338 case NFC_LLCP_REMOTE_MIU:
339 remote_miu = llcp_sock->remote_miu > LLCP_MAX_MIU ?
340 local->remote_miu : llcp_sock->remote_miu;
342 if (put_user(remote_miu, (u32 __user *) optval))
347 case NFC_LLCP_REMOTE_LTO:
348 if (put_user(local->remote_lto / 10, (u32 __user *) optval))
353 case NFC_LLCP_REMOTE_RW:
354 if (put_user(llcp_sock->remote_rw, (u32 __user *) optval))
366 if (put_user(len, optlen))
372 void nfc_llcp_accept_unlink(struct sock *sk)
374 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
376 pr_debug("state %d\n", sk->sk_state);
378 list_del_init(&llcp_sock->accept_queue);
379 sk_acceptq_removed(llcp_sock->parent);
380 llcp_sock->parent = NULL;
385 void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk)
387 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
388 struct nfc_llcp_sock *llcp_sock_parent = nfc_llcp_sock(parent);
390 /* Lock will be free from unlink */
393 list_add_tail(&llcp_sock->accept_queue,
394 &llcp_sock_parent->accept_queue);
395 llcp_sock->parent = parent;
396 sk_acceptq_added(parent);
399 struct sock *nfc_llcp_accept_dequeue(struct sock *parent,
400 struct socket *newsock)
402 struct nfc_llcp_sock *lsk, *n, *llcp_parent;
405 llcp_parent = nfc_llcp_sock(parent);
407 list_for_each_entry_safe(lsk, n, &llcp_parent->accept_queue,
412 if (sk->sk_state == LLCP_CLOSED) {
414 nfc_llcp_accept_unlink(sk);
418 if (sk->sk_state == LLCP_CONNECTED || !newsock) {
419 list_del_init(&lsk->accept_queue);
423 sock_graft(sk, newsock);
427 pr_debug("Returning sk state %d\n", sk->sk_state);
429 sk_acceptq_removed(parent);
440 static int llcp_sock_accept(struct socket *sock, struct socket *newsock,
441 int flags, bool kern)
443 DECLARE_WAITQUEUE(wait, current);
444 struct sock *sk = sock->sk, *new_sk;
448 pr_debug("parent %p\n", sk);
450 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
452 if (sk->sk_state != LLCP_LISTEN) {
457 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
459 /* Wait for an incoming connection. */
460 add_wait_queue_exclusive(sk_sleep(sk), &wait);
461 while (!(new_sk = nfc_llcp_accept_dequeue(sk, newsock))) {
462 set_current_state(TASK_INTERRUPTIBLE);
469 if (signal_pending(current)) {
470 ret = sock_intr_errno(timeo);
475 timeo = schedule_timeout(timeo);
476 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
478 __set_current_state(TASK_RUNNING);
479 remove_wait_queue(sk_sleep(sk), &wait);
484 newsock->state = SS_CONNECTED;
486 pr_debug("new socket %p\n", new_sk);
494 static int llcp_sock_getname(struct socket *sock, struct sockaddr *uaddr,
497 struct sock *sk = sock->sk;
498 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
499 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, llcp_addr, uaddr);
501 if (llcp_sock == NULL || llcp_sock->dev == NULL)
504 pr_debug("%p %d %d %d\n", sk, llcp_sock->target_idx,
505 llcp_sock->dsap, llcp_sock->ssap);
507 memset(llcp_addr, 0, sizeof(*llcp_addr));
510 if (!llcp_sock->dev) {
514 llcp_addr->sa_family = AF_NFC;
515 llcp_addr->dev_idx = llcp_sock->dev->idx;
516 llcp_addr->target_idx = llcp_sock->target_idx;
517 llcp_addr->nfc_protocol = llcp_sock->nfc_protocol;
518 llcp_addr->dsap = llcp_sock->dsap;
519 llcp_addr->ssap = llcp_sock->ssap;
520 llcp_addr->service_name_len = llcp_sock->service_name_len;
521 memcpy(llcp_addr->service_name, llcp_sock->service_name,
522 llcp_addr->service_name_len);
525 return sizeof(struct sockaddr_nfc_llcp);
528 static inline __poll_t llcp_accept_poll(struct sock *parent)
530 struct nfc_llcp_sock *llcp_sock, *parent_sock;
533 parent_sock = nfc_llcp_sock(parent);
535 list_for_each_entry(llcp_sock, &parent_sock->accept_queue,
539 if (sk->sk_state == LLCP_CONNECTED)
540 return EPOLLIN | EPOLLRDNORM;
546 static __poll_t llcp_sock_poll(struct file *file, struct socket *sock,
549 struct sock *sk = sock->sk;
552 pr_debug("%p\n", sk);
554 sock_poll_wait(file, sock, wait);
556 if (sk->sk_state == LLCP_LISTEN)
557 return llcp_accept_poll(sk);
559 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
561 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
563 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
564 mask |= EPOLLIN | EPOLLRDNORM;
566 if (sk->sk_state == LLCP_CLOSED)
569 if (sk->sk_shutdown & RCV_SHUTDOWN)
570 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
572 if (sk->sk_shutdown == SHUTDOWN_MASK)
575 if (sock_writeable(sk) && sk->sk_state == LLCP_CONNECTED)
576 mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
578 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
580 pr_debug("mask 0x%x\n", mask);
585 static int llcp_sock_release(struct socket *sock)
587 struct sock *sk = sock->sk;
588 struct nfc_llcp_local *local;
589 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
595 pr_debug("%p\n", sk);
597 local = llcp_sock->local;
606 if (sk->sk_state == LLCP_CONNECTED)
607 nfc_llcp_send_disconnect(llcp_sock);
609 if (sk->sk_state == LLCP_LISTEN) {
610 struct nfc_llcp_sock *lsk, *n;
611 struct sock *accept_sk;
613 list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue,
615 accept_sk = &lsk->sk;
616 lock_sock(accept_sk);
618 nfc_llcp_send_disconnect(lsk);
619 nfc_llcp_accept_unlink(accept_sk);
621 release_sock(accept_sk);
625 if (llcp_sock->reserved_ssap < LLCP_SAP_MAX)
626 nfc_llcp_put_ssap(llcp_sock->local, llcp_sock->ssap);
630 /* Keep this sock alive and therefore do not remove it from the sockets
631 * list until the DISC PDU has been actually sent. Otherwise we would
632 * reply with DM PDUs before sending the DISC one.
634 if (sk->sk_state == LLCP_DISCONNECTING)
637 if (sock->type == SOCK_RAW)
638 nfc_llcp_sock_unlink(&local->raw_sockets, sk);
640 nfc_llcp_sock_unlink(&local->sockets, sk);
649 static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr,
652 struct sock *sk = sock->sk;
653 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
654 struct sockaddr_nfc_llcp *addr = (struct sockaddr_nfc_llcp *)_addr;
656 struct nfc_llcp_local *local;
659 pr_debug("sock %p sk %p flags 0x%x\n", sock, sk, flags);
661 if (!addr || len < sizeof(*addr) || addr->sa_family != AF_NFC)
664 if (addr->service_name_len == 0 && addr->dsap == 0)
667 pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n", addr->dev_idx,
668 addr->target_idx, addr->nfc_protocol);
672 if (sk->sk_state == LLCP_CONNECTED) {
677 dev = nfc_get_device(addr->dev_idx);
683 local = nfc_llcp_find_local(dev);
689 device_lock(&dev->dev);
690 if (dev->dep_link_up == false) {
692 device_unlock(&dev->dev);
695 device_unlock(&dev->dev);
697 if (local->rf_mode == NFC_RF_INITIATOR &&
698 addr->target_idx != local->target_idx) {
703 llcp_sock->dev = dev;
704 llcp_sock->local = nfc_llcp_local_get(local);
705 llcp_sock->ssap = nfc_llcp_get_local_ssap(local);
706 if (llcp_sock->ssap == LLCP_SAP_MAX) {
707 nfc_llcp_local_put(llcp_sock->local);
712 llcp_sock->reserved_ssap = llcp_sock->ssap;
714 if (addr->service_name_len == 0)
715 llcp_sock->dsap = addr->dsap;
717 llcp_sock->dsap = LLCP_SAP_SDP;
718 llcp_sock->nfc_protocol = addr->nfc_protocol;
719 llcp_sock->service_name_len = min_t(unsigned int,
720 addr->service_name_len,
721 NFC_LLCP_MAX_SERVICE_NAME);
722 llcp_sock->service_name = kmemdup(addr->service_name,
723 llcp_sock->service_name_len,
725 if (!llcp_sock->service_name) {
727 goto sock_llcp_release;
730 nfc_llcp_sock_link(&local->connecting_sockets, sk);
732 ret = nfc_llcp_send_connect(llcp_sock);
736 sk->sk_state = LLCP_CONNECTING;
738 ret = sock_wait_state(sk, LLCP_CONNECTED,
739 sock_sndtimeo(sk, flags & O_NONBLOCK));
740 if (ret && ret != -EINPROGRESS)
748 nfc_llcp_sock_unlink(&local->connecting_sockets, sk);
751 nfc_llcp_put_ssap(local, llcp_sock->ssap);
752 nfc_llcp_local_put(llcp_sock->local);
762 static int llcp_sock_sendmsg(struct socket *sock, struct msghdr *msg,
765 struct sock *sk = sock->sk;
766 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
769 pr_debug("sock %p sk %p", sock, sk);
771 ret = sock_error(sk);
775 if (msg->msg_flags & MSG_OOB)
780 if (sk->sk_type == SOCK_DGRAM) {
781 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, addr,
784 if (msg->msg_namelen < sizeof(*addr)) {
791 return nfc_llcp_send_ui_frame(llcp_sock, addr->dsap, addr->ssap,
795 if (sk->sk_state != LLCP_CONNECTED) {
802 return nfc_llcp_send_i_frame(llcp_sock, msg, len);
805 static int llcp_sock_recvmsg(struct socket *sock, struct msghdr *msg,
806 size_t len, int flags)
808 int noblock = flags & MSG_DONTWAIT;
809 struct sock *sk = sock->sk;
810 unsigned int copied, rlen;
811 struct sk_buff *skb, *cskb;
814 pr_debug("%p %zu\n", sk, len);
818 if (sk->sk_state == LLCP_CLOSED &&
819 skb_queue_empty(&sk->sk_receive_queue)) {
826 if (flags & (MSG_OOB))
829 skb = skb_recv_datagram(sk, flags, noblock, &err);
831 pr_err("Recv datagram failed state %d %d %d",
832 sk->sk_state, err, sock_error(sk));
834 if (sk->sk_shutdown & RCV_SHUTDOWN)
840 rlen = skb->len; /* real length of skb */
841 copied = min_t(unsigned int, rlen, len);
844 if (skb_copy_datagram_msg(cskb, 0, msg, copied)) {
845 if (!(flags & MSG_PEEK))
846 skb_queue_head(&sk->sk_receive_queue, skb);
850 sock_recv_timestamp(msg, sk, skb);
852 if (sk->sk_type == SOCK_DGRAM && msg->msg_name) {
853 struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb);
854 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, sockaddr,
857 msg->msg_namelen = sizeof(struct sockaddr_nfc_llcp);
859 pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
861 memset(sockaddr, 0, sizeof(*sockaddr));
862 sockaddr->sa_family = AF_NFC;
863 sockaddr->nfc_protocol = NFC_PROTO_NFC_DEP;
864 sockaddr->dsap = ui_cb->dsap;
865 sockaddr->ssap = ui_cb->ssap;
868 /* Mark read part of skb as used */
869 if (!(flags & MSG_PEEK)) {
871 /* SOCK_STREAM: re-queue skb if it contains unreceived data */
872 if (sk->sk_type == SOCK_STREAM ||
873 sk->sk_type == SOCK_DGRAM ||
874 sk->sk_type == SOCK_RAW) {
875 skb_pull(skb, copied);
877 skb_queue_head(&sk->sk_receive_queue, skb);
885 /* XXX Queue backlogged skbs */
888 /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */
889 if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC))
895 static const struct proto_ops llcp_sock_ops = {
897 .owner = THIS_MODULE,
898 .bind = llcp_sock_bind,
899 .connect = llcp_sock_connect,
900 .release = llcp_sock_release,
901 .socketpair = sock_no_socketpair,
902 .accept = llcp_sock_accept,
903 .getname = llcp_sock_getname,
904 .poll = llcp_sock_poll,
905 .ioctl = sock_no_ioctl,
906 .listen = llcp_sock_listen,
907 .shutdown = sock_no_shutdown,
908 .setsockopt = nfc_llcp_setsockopt,
909 .getsockopt = nfc_llcp_getsockopt,
910 .sendmsg = llcp_sock_sendmsg,
911 .recvmsg = llcp_sock_recvmsg,
912 .mmap = sock_no_mmap,
915 static const struct proto_ops llcp_rawsock_ops = {
917 .owner = THIS_MODULE,
918 .bind = llcp_raw_sock_bind,
919 .connect = sock_no_connect,
920 .release = llcp_sock_release,
921 .socketpair = sock_no_socketpair,
922 .accept = sock_no_accept,
923 .getname = llcp_sock_getname,
924 .poll = llcp_sock_poll,
925 .ioctl = sock_no_ioctl,
926 .listen = sock_no_listen,
927 .shutdown = sock_no_shutdown,
928 .sendmsg = sock_no_sendmsg,
929 .recvmsg = llcp_sock_recvmsg,
930 .mmap = sock_no_mmap,
933 static void llcp_sock_destruct(struct sock *sk)
935 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
937 pr_debug("%p\n", sk);
939 if (sk->sk_state == LLCP_CONNECTED)
940 nfc_put_device(llcp_sock->dev);
942 skb_queue_purge(&sk->sk_receive_queue);
944 nfc_llcp_sock_free(llcp_sock);
946 if (!sock_flag(sk, SOCK_DEAD)) {
947 pr_err("Freeing alive NFC LLCP socket %p\n", sk);
952 struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern)
955 struct nfc_llcp_sock *llcp_sock;
957 sk = sk_alloc(&init_net, PF_NFC, gfp, &llcp_sock_proto, kern);
961 llcp_sock = nfc_llcp_sock(sk);
963 sock_init_data(sock, sk);
964 sk->sk_state = LLCP_CLOSED;
965 sk->sk_protocol = NFC_SOCKPROTO_LLCP;
967 sk->sk_destruct = llcp_sock_destruct;
970 llcp_sock->dsap = LLCP_SAP_SDP;
971 llcp_sock->rw = LLCP_MAX_RW + 1;
972 llcp_sock->miux = cpu_to_be16(LLCP_MAX_MIUX + 1);
973 llcp_sock->send_n = llcp_sock->send_ack_n = 0;
974 llcp_sock->recv_n = llcp_sock->recv_ack_n = 0;
975 llcp_sock->remote_ready = 1;
976 llcp_sock->reserved_ssap = LLCP_SAP_MAX;
977 nfc_llcp_socket_remote_param_init(llcp_sock);
978 skb_queue_head_init(&llcp_sock->tx_queue);
979 skb_queue_head_init(&llcp_sock->tx_pending_queue);
980 INIT_LIST_HEAD(&llcp_sock->accept_queue);
983 sock->state = SS_UNCONNECTED;
988 void nfc_llcp_sock_free(struct nfc_llcp_sock *sock)
990 kfree(sock->service_name);
992 skb_queue_purge(&sock->tx_queue);
993 skb_queue_purge(&sock->tx_pending_queue);
995 list_del_init(&sock->accept_queue);
999 nfc_llcp_local_put(sock->local);
1002 static int llcp_sock_create(struct net *net, struct socket *sock,
1003 const struct nfc_protocol *nfc_proto, int kern)
1007 pr_debug("%p\n", sock);
1009 if (sock->type != SOCK_STREAM &&
1010 sock->type != SOCK_DGRAM &&
1011 sock->type != SOCK_RAW)
1012 return -ESOCKTNOSUPPORT;
1014 if (sock->type == SOCK_RAW) {
1015 if (!capable(CAP_NET_RAW))
1017 sock->ops = &llcp_rawsock_ops;
1019 sock->ops = &llcp_sock_ops;
1022 sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC, kern);
1029 static const struct nfc_protocol llcp_nfc_proto = {
1030 .id = NFC_SOCKPROTO_LLCP,
1031 .proto = &llcp_sock_proto,
1032 .owner = THIS_MODULE,
1033 .create = llcp_sock_create
1036 int __init nfc_llcp_sock_init(void)
1038 return nfc_proto_register(&llcp_nfc_proto);
1041 void nfc_llcp_sock_exit(void)
1043 nfc_proto_unregister(&llcp_nfc_proto);