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);
112 llcp_sock->local = NULL;
116 llcp_sock->ssap = nfc_llcp_get_sdp_ssap(local, llcp_sock);
117 if (llcp_sock->ssap == LLCP_SAP_MAX) {
118 nfc_llcp_local_put(llcp_sock->local);
119 llcp_sock->local = NULL;
120 kfree(llcp_sock->service_name);
121 llcp_sock->service_name = NULL;
126 llcp_sock->reserved_ssap = llcp_sock->ssap;
128 nfc_llcp_sock_link(&local->sockets, sk);
130 pr_debug("Socket bound to SAP %d\n", llcp_sock->ssap);
132 sk->sk_state = LLCP_BOUND;
142 static int llcp_raw_sock_bind(struct socket *sock, struct sockaddr *addr,
145 struct sock *sk = sock->sk;
146 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
147 struct nfc_llcp_local *local;
149 struct sockaddr_nfc_llcp llcp_addr;
152 if (!addr || alen < offsetofend(struct sockaddr, sa_family) ||
153 addr->sa_family != AF_NFC)
156 pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family);
158 memset(&llcp_addr, 0, sizeof(llcp_addr));
159 len = min_t(unsigned int, sizeof(llcp_addr), alen);
160 memcpy(&llcp_addr, addr, len);
164 if (sk->sk_state != LLCP_CLOSED) {
169 dev = nfc_get_device(llcp_addr.dev_idx);
175 local = nfc_llcp_find_local(dev);
181 llcp_sock->dev = dev;
182 llcp_sock->local = nfc_llcp_local_get(local);
183 llcp_sock->nfc_protocol = llcp_addr.nfc_protocol;
185 nfc_llcp_sock_link(&local->raw_sockets, sk);
187 sk->sk_state = LLCP_BOUND;
197 static int llcp_sock_listen(struct socket *sock, int backlog)
199 struct sock *sk = sock->sk;
202 pr_debug("sk %p backlog %d\n", sk, backlog);
206 if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) ||
207 sk->sk_state != LLCP_BOUND) {
212 sk->sk_max_ack_backlog = backlog;
213 sk->sk_ack_backlog = 0;
215 pr_debug("Socket listening\n");
216 sk->sk_state = LLCP_LISTEN;
224 static int nfc_llcp_setsockopt(struct socket *sock, int level, int optname,
225 sockptr_t optval, unsigned int optlen)
227 struct sock *sk = sock->sk;
228 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
232 pr_debug("%p optname %d\n", sk, optname);
234 if (level != SOL_NFC)
241 if (sk->sk_state == LLCP_CONNECTED ||
242 sk->sk_state == LLCP_BOUND ||
243 sk->sk_state == LLCP_LISTEN) {
248 if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
253 if (opt > LLCP_MAX_RW) {
258 llcp_sock->rw = (u8) opt;
263 if (sk->sk_state == LLCP_CONNECTED ||
264 sk->sk_state == LLCP_BOUND ||
265 sk->sk_state == LLCP_LISTEN) {
270 if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
275 if (opt > LLCP_MAX_MIUX) {
280 llcp_sock->miux = cpu_to_be16((u16) opt);
291 pr_debug("%p rw %d miux %d\n", llcp_sock,
292 llcp_sock->rw, llcp_sock->miux);
297 static int nfc_llcp_getsockopt(struct socket *sock, int level, int optname,
298 char __user *optval, int __user *optlen)
300 struct nfc_llcp_local *local;
301 struct sock *sk = sock->sk;
302 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
304 u16 miux, remote_miu;
307 pr_debug("%p optname %d\n", sk, optname);
309 if (level != SOL_NFC)
312 if (get_user(len, optlen))
315 local = llcp_sock->local;
319 len = min_t(u32, len, sizeof(u32));
325 rw = llcp_sock->rw > LLCP_MAX_RW ? local->rw : llcp_sock->rw;
326 if (put_user(rw, (u32 __user *) optval))
332 miux = be16_to_cpu(llcp_sock->miux) > LLCP_MAX_MIUX ?
333 be16_to_cpu(local->miux) : be16_to_cpu(llcp_sock->miux);
335 if (put_user(miux, (u32 __user *) optval))
340 case NFC_LLCP_REMOTE_MIU:
341 remote_miu = llcp_sock->remote_miu > LLCP_MAX_MIU ?
342 local->remote_miu : llcp_sock->remote_miu;
344 if (put_user(remote_miu, (u32 __user *) optval))
349 case NFC_LLCP_REMOTE_LTO:
350 if (put_user(local->remote_lto / 10, (u32 __user *) optval))
355 case NFC_LLCP_REMOTE_RW:
356 if (put_user(llcp_sock->remote_rw, (u32 __user *) optval))
368 if (put_user(len, optlen))
374 void nfc_llcp_accept_unlink(struct sock *sk)
376 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
378 pr_debug("state %d\n", sk->sk_state);
380 list_del_init(&llcp_sock->accept_queue);
381 sk_acceptq_removed(llcp_sock->parent);
382 llcp_sock->parent = NULL;
387 void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk)
389 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
390 struct nfc_llcp_sock *llcp_sock_parent = nfc_llcp_sock(parent);
392 /* Lock will be free from unlink */
395 list_add_tail(&llcp_sock->accept_queue,
396 &llcp_sock_parent->accept_queue);
397 llcp_sock->parent = parent;
398 sk_acceptq_added(parent);
401 struct sock *nfc_llcp_accept_dequeue(struct sock *parent,
402 struct socket *newsock)
404 struct nfc_llcp_sock *lsk, *n, *llcp_parent;
407 llcp_parent = nfc_llcp_sock(parent);
409 list_for_each_entry_safe(lsk, n, &llcp_parent->accept_queue,
414 if (sk->sk_state == LLCP_CLOSED) {
416 nfc_llcp_accept_unlink(sk);
420 if (sk->sk_state == LLCP_CONNECTED || !newsock) {
421 list_del_init(&lsk->accept_queue);
425 sock_graft(sk, newsock);
429 pr_debug("Returning sk state %d\n", sk->sk_state);
431 sk_acceptq_removed(parent);
442 static int llcp_sock_accept(struct socket *sock, struct socket *newsock,
443 int flags, bool kern)
445 DECLARE_WAITQUEUE(wait, current);
446 struct sock *sk = sock->sk, *new_sk;
450 pr_debug("parent %p\n", sk);
452 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
454 if (sk->sk_state != LLCP_LISTEN) {
459 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
461 /* Wait for an incoming connection. */
462 add_wait_queue_exclusive(sk_sleep(sk), &wait);
463 while (!(new_sk = nfc_llcp_accept_dequeue(sk, newsock))) {
464 set_current_state(TASK_INTERRUPTIBLE);
471 if (signal_pending(current)) {
472 ret = sock_intr_errno(timeo);
477 timeo = schedule_timeout(timeo);
478 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
480 __set_current_state(TASK_RUNNING);
481 remove_wait_queue(sk_sleep(sk), &wait);
486 newsock->state = SS_CONNECTED;
488 pr_debug("new socket %p\n", new_sk);
496 static int llcp_sock_getname(struct socket *sock, struct sockaddr *uaddr,
499 struct sock *sk = sock->sk;
500 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
501 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, llcp_addr, uaddr);
503 if (llcp_sock == NULL || llcp_sock->dev == NULL)
506 pr_debug("%p %d %d %d\n", sk, llcp_sock->target_idx,
507 llcp_sock->dsap, llcp_sock->ssap);
509 memset(llcp_addr, 0, sizeof(*llcp_addr));
512 if (!llcp_sock->dev) {
516 llcp_addr->sa_family = AF_NFC;
517 llcp_addr->dev_idx = llcp_sock->dev->idx;
518 llcp_addr->target_idx = llcp_sock->target_idx;
519 llcp_addr->nfc_protocol = llcp_sock->nfc_protocol;
520 llcp_addr->dsap = llcp_sock->dsap;
521 llcp_addr->ssap = llcp_sock->ssap;
522 llcp_addr->service_name_len = llcp_sock->service_name_len;
523 memcpy(llcp_addr->service_name, llcp_sock->service_name,
524 llcp_addr->service_name_len);
527 return sizeof(struct sockaddr_nfc_llcp);
530 static inline __poll_t llcp_accept_poll(struct sock *parent)
532 struct nfc_llcp_sock *llcp_sock, *parent_sock;
535 parent_sock = nfc_llcp_sock(parent);
537 list_for_each_entry(llcp_sock, &parent_sock->accept_queue,
541 if (sk->sk_state == LLCP_CONNECTED)
542 return EPOLLIN | EPOLLRDNORM;
548 static __poll_t llcp_sock_poll(struct file *file, struct socket *sock,
551 struct sock *sk = sock->sk;
554 pr_debug("%p\n", sk);
556 sock_poll_wait(file, sock, wait);
558 if (sk->sk_state == LLCP_LISTEN)
559 return llcp_accept_poll(sk);
561 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
563 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
565 if (!skb_queue_empty_lockless(&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) {
678 if (sk->sk_state == LLCP_CONNECTING) {
683 dev = nfc_get_device(addr->dev_idx);
689 local = nfc_llcp_find_local(dev);
695 device_lock(&dev->dev);
696 if (dev->dep_link_up == false) {
698 device_unlock(&dev->dev);
701 device_unlock(&dev->dev);
703 if (local->rf_mode == NFC_RF_INITIATOR &&
704 addr->target_idx != local->target_idx) {
709 llcp_sock->dev = dev;
710 llcp_sock->local = nfc_llcp_local_get(local);
711 llcp_sock->ssap = nfc_llcp_get_local_ssap(local);
712 if (llcp_sock->ssap == LLCP_SAP_MAX) {
713 nfc_llcp_local_put(llcp_sock->local);
714 llcp_sock->local = NULL;
719 llcp_sock->reserved_ssap = llcp_sock->ssap;
721 if (addr->service_name_len == 0)
722 llcp_sock->dsap = addr->dsap;
724 llcp_sock->dsap = LLCP_SAP_SDP;
725 llcp_sock->nfc_protocol = addr->nfc_protocol;
726 llcp_sock->service_name_len = min_t(unsigned int,
727 addr->service_name_len,
728 NFC_LLCP_MAX_SERVICE_NAME);
729 llcp_sock->service_name = kmemdup(addr->service_name,
730 llcp_sock->service_name_len,
732 if (!llcp_sock->service_name) {
734 goto sock_llcp_release;
737 nfc_llcp_sock_link(&local->connecting_sockets, sk);
739 ret = nfc_llcp_send_connect(llcp_sock);
743 sk->sk_state = LLCP_CONNECTING;
745 ret = sock_wait_state(sk, LLCP_CONNECTED,
746 sock_sndtimeo(sk, flags & O_NONBLOCK));
747 if (ret && ret != -EINPROGRESS)
755 nfc_llcp_sock_unlink(&local->connecting_sockets, sk);
756 kfree(llcp_sock->service_name);
757 llcp_sock->service_name = NULL;
760 nfc_llcp_put_ssap(local, llcp_sock->ssap);
761 nfc_llcp_local_put(llcp_sock->local);
762 llcp_sock->local = NULL;
772 static int llcp_sock_sendmsg(struct socket *sock, struct msghdr *msg,
775 struct sock *sk = sock->sk;
776 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
779 pr_debug("sock %p sk %p", sock, sk);
781 ret = sock_error(sk);
785 if (msg->msg_flags & MSG_OOB)
790 if (sk->sk_type == SOCK_DGRAM) {
791 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, addr,
794 if (msg->msg_namelen < sizeof(*addr)) {
801 return nfc_llcp_send_ui_frame(llcp_sock, addr->dsap, addr->ssap,
805 if (sk->sk_state != LLCP_CONNECTED) {
812 return nfc_llcp_send_i_frame(llcp_sock, msg, len);
815 static int llcp_sock_recvmsg(struct socket *sock, struct msghdr *msg,
816 size_t len, int flags)
818 int noblock = flags & MSG_DONTWAIT;
819 struct sock *sk = sock->sk;
820 unsigned int copied, rlen;
821 struct sk_buff *skb, *cskb;
824 pr_debug("%p %zu\n", sk, len);
828 if (sk->sk_state == LLCP_CLOSED &&
829 skb_queue_empty(&sk->sk_receive_queue)) {
836 if (flags & (MSG_OOB))
839 skb = skb_recv_datagram(sk, flags, noblock, &err);
841 pr_err("Recv datagram failed state %d %d %d",
842 sk->sk_state, err, sock_error(sk));
844 if (sk->sk_shutdown & RCV_SHUTDOWN)
850 rlen = skb->len; /* real length of skb */
851 copied = min_t(unsigned int, rlen, len);
854 if (skb_copy_datagram_msg(cskb, 0, msg, copied)) {
855 if (!(flags & MSG_PEEK))
856 skb_queue_head(&sk->sk_receive_queue, skb);
860 sock_recv_timestamp(msg, sk, skb);
862 if (sk->sk_type == SOCK_DGRAM && msg->msg_name) {
863 struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb);
864 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, sockaddr,
867 msg->msg_namelen = sizeof(struct sockaddr_nfc_llcp);
869 pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
871 memset(sockaddr, 0, sizeof(*sockaddr));
872 sockaddr->sa_family = AF_NFC;
873 sockaddr->nfc_protocol = NFC_PROTO_NFC_DEP;
874 sockaddr->dsap = ui_cb->dsap;
875 sockaddr->ssap = ui_cb->ssap;
878 /* Mark read part of skb as used */
879 if (!(flags & MSG_PEEK)) {
881 /* SOCK_STREAM: re-queue skb if it contains unreceived data */
882 if (sk->sk_type == SOCK_STREAM ||
883 sk->sk_type == SOCK_DGRAM ||
884 sk->sk_type == SOCK_RAW) {
885 skb_pull(skb, copied);
887 skb_queue_head(&sk->sk_receive_queue, skb);
895 /* XXX Queue backlogged skbs */
898 /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */
899 if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC))
905 static const struct proto_ops llcp_sock_ops = {
907 .owner = THIS_MODULE,
908 .bind = llcp_sock_bind,
909 .connect = llcp_sock_connect,
910 .release = llcp_sock_release,
911 .socketpair = sock_no_socketpair,
912 .accept = llcp_sock_accept,
913 .getname = llcp_sock_getname,
914 .poll = llcp_sock_poll,
915 .ioctl = sock_no_ioctl,
916 .listen = llcp_sock_listen,
917 .shutdown = sock_no_shutdown,
918 .setsockopt = nfc_llcp_setsockopt,
919 .getsockopt = nfc_llcp_getsockopt,
920 .sendmsg = llcp_sock_sendmsg,
921 .recvmsg = llcp_sock_recvmsg,
922 .mmap = sock_no_mmap,
925 static const struct proto_ops llcp_rawsock_ops = {
927 .owner = THIS_MODULE,
928 .bind = llcp_raw_sock_bind,
929 .connect = sock_no_connect,
930 .release = llcp_sock_release,
931 .socketpair = sock_no_socketpair,
932 .accept = sock_no_accept,
933 .getname = llcp_sock_getname,
934 .poll = llcp_sock_poll,
935 .ioctl = sock_no_ioctl,
936 .listen = sock_no_listen,
937 .shutdown = sock_no_shutdown,
938 .sendmsg = sock_no_sendmsg,
939 .recvmsg = llcp_sock_recvmsg,
940 .mmap = sock_no_mmap,
943 static void llcp_sock_destruct(struct sock *sk)
945 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
947 pr_debug("%p\n", sk);
949 if (sk->sk_state == LLCP_CONNECTED)
950 nfc_put_device(llcp_sock->dev);
952 skb_queue_purge(&sk->sk_receive_queue);
954 nfc_llcp_sock_free(llcp_sock);
956 if (!sock_flag(sk, SOCK_DEAD)) {
957 pr_err("Freeing alive NFC LLCP socket %p\n", sk);
962 struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern)
965 struct nfc_llcp_sock *llcp_sock;
967 sk = sk_alloc(&init_net, PF_NFC, gfp, &llcp_sock_proto, kern);
971 llcp_sock = nfc_llcp_sock(sk);
973 sock_init_data(sock, sk);
974 sk->sk_state = LLCP_CLOSED;
975 sk->sk_protocol = NFC_SOCKPROTO_LLCP;
977 sk->sk_destruct = llcp_sock_destruct;
980 llcp_sock->dsap = LLCP_SAP_SDP;
981 llcp_sock->rw = LLCP_MAX_RW + 1;
982 llcp_sock->miux = cpu_to_be16(LLCP_MAX_MIUX + 1);
983 llcp_sock->send_n = llcp_sock->send_ack_n = 0;
984 llcp_sock->recv_n = llcp_sock->recv_ack_n = 0;
985 llcp_sock->remote_ready = 1;
986 llcp_sock->reserved_ssap = LLCP_SAP_MAX;
987 nfc_llcp_socket_remote_param_init(llcp_sock);
988 skb_queue_head_init(&llcp_sock->tx_queue);
989 skb_queue_head_init(&llcp_sock->tx_pending_queue);
990 INIT_LIST_HEAD(&llcp_sock->accept_queue);
993 sock->state = SS_UNCONNECTED;
998 void nfc_llcp_sock_free(struct nfc_llcp_sock *sock)
1000 kfree(sock->service_name);
1002 skb_queue_purge(&sock->tx_queue);
1003 skb_queue_purge(&sock->tx_pending_queue);
1005 list_del_init(&sock->accept_queue);
1007 sock->parent = NULL;
1009 nfc_llcp_local_put(sock->local);
1012 static int llcp_sock_create(struct net *net, struct socket *sock,
1013 const struct nfc_protocol *nfc_proto, int kern)
1017 pr_debug("%p\n", sock);
1019 if (sock->type != SOCK_STREAM &&
1020 sock->type != SOCK_DGRAM &&
1021 sock->type != SOCK_RAW)
1022 return -ESOCKTNOSUPPORT;
1024 if (sock->type == SOCK_RAW) {
1025 if (!capable(CAP_NET_RAW))
1027 sock->ops = &llcp_rawsock_ops;
1029 sock->ops = &llcp_sock_ops;
1032 sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC, kern);
1039 static const struct nfc_protocol llcp_nfc_proto = {
1040 .id = NFC_SOCKPROTO_LLCP,
1041 .proto = &llcp_sock_proto,
1042 .owner = THIS_MODULE,
1043 .create = llcp_sock_create
1046 int __init nfc_llcp_sock_init(void)
1048 return nfc_proto_register(&llcp_nfc_proto);
1051 void nfc_llcp_sock_exit(void)
1053 nfc_proto_unregister(&llcp_nfc_proto);