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,
122 if (!llcp_sock->service_name) {
123 nfc_llcp_local_put(llcp_sock->local);
124 llcp_sock->local = NULL;
125 llcp_sock->dev = NULL;
129 llcp_sock->ssap = nfc_llcp_get_sdp_ssap(local, llcp_sock);
130 if (llcp_sock->ssap == LLCP_SAP_MAX) {
131 nfc_llcp_local_put(llcp_sock->local);
132 llcp_sock->local = NULL;
133 kfree(llcp_sock->service_name);
134 llcp_sock->service_name = NULL;
135 llcp_sock->dev = NULL;
140 llcp_sock->reserved_ssap = llcp_sock->ssap;
142 nfc_llcp_sock_link(&local->sockets, sk);
144 pr_debug("Socket bound to SAP %d\n", llcp_sock->ssap);
146 sk->sk_state = LLCP_BOUND;
156 static int llcp_raw_sock_bind(struct socket *sock, struct sockaddr *addr,
159 struct sock *sk = sock->sk;
160 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
161 struct nfc_llcp_local *local;
163 struct sockaddr_nfc_llcp llcp_addr;
166 if (!addr || alen < offsetofend(struct sockaddr, sa_family) ||
167 addr->sa_family != AF_NFC)
170 pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family);
172 memset(&llcp_addr, 0, sizeof(llcp_addr));
173 len = min_t(unsigned int, sizeof(llcp_addr), alen);
174 memcpy(&llcp_addr, addr, len);
178 if (sk->sk_state != LLCP_CLOSED) {
183 dev = nfc_get_device(llcp_addr.dev_idx);
189 local = nfc_llcp_find_local(dev);
195 llcp_sock->dev = dev;
196 llcp_sock->local = nfc_llcp_local_get(local);
197 llcp_sock->nfc_protocol = llcp_addr.nfc_protocol;
199 nfc_llcp_sock_link(&local->raw_sockets, sk);
201 sk->sk_state = LLCP_BOUND;
211 static int llcp_sock_listen(struct socket *sock, int backlog)
213 struct sock *sk = sock->sk;
216 pr_debug("sk %p backlog %d\n", sk, backlog);
220 if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) ||
221 sk->sk_state != LLCP_BOUND) {
226 sk->sk_max_ack_backlog = backlog;
227 sk->sk_ack_backlog = 0;
229 pr_debug("Socket listening\n");
230 sk->sk_state = LLCP_LISTEN;
238 static int nfc_llcp_setsockopt(struct socket *sock, int level, int optname,
239 char __user *optval, unsigned int optlen)
241 struct sock *sk = sock->sk;
242 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
246 pr_debug("%p optname %d\n", sk, optname);
248 if (level != SOL_NFC)
255 if (sk->sk_state == LLCP_CONNECTED ||
256 sk->sk_state == LLCP_BOUND ||
257 sk->sk_state == LLCP_LISTEN) {
262 if (get_user(opt, (u32 __user *) optval)) {
267 if (opt > LLCP_MAX_RW) {
272 llcp_sock->rw = (u8) opt;
277 if (sk->sk_state == LLCP_CONNECTED ||
278 sk->sk_state == LLCP_BOUND ||
279 sk->sk_state == LLCP_LISTEN) {
284 if (get_user(opt, (u32 __user *) optval)) {
289 if (opt > LLCP_MAX_MIUX) {
294 llcp_sock->miux = cpu_to_be16((u16) opt);
305 pr_debug("%p rw %d miux %d\n", llcp_sock,
306 llcp_sock->rw, llcp_sock->miux);
311 static int nfc_llcp_getsockopt(struct socket *sock, int level, int optname,
312 char __user *optval, int __user *optlen)
314 struct nfc_llcp_local *local;
315 struct sock *sk = sock->sk;
316 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
318 u16 miux, remote_miu;
321 pr_debug("%p optname %d\n", sk, optname);
323 if (level != SOL_NFC)
326 if (get_user(len, optlen))
329 local = llcp_sock->local;
333 len = min_t(u32, len, sizeof(u32));
339 rw = llcp_sock->rw > LLCP_MAX_RW ? local->rw : llcp_sock->rw;
340 if (put_user(rw, (u32 __user *) optval))
346 miux = be16_to_cpu(llcp_sock->miux) > LLCP_MAX_MIUX ?
347 be16_to_cpu(local->miux) : be16_to_cpu(llcp_sock->miux);
349 if (put_user(miux, (u32 __user *) optval))
354 case NFC_LLCP_REMOTE_MIU:
355 remote_miu = llcp_sock->remote_miu > LLCP_MAX_MIU ?
356 local->remote_miu : llcp_sock->remote_miu;
358 if (put_user(remote_miu, (u32 __user *) optval))
363 case NFC_LLCP_REMOTE_LTO:
364 if (put_user(local->remote_lto / 10, (u32 __user *) optval))
369 case NFC_LLCP_REMOTE_RW:
370 if (put_user(llcp_sock->remote_rw, (u32 __user *) optval))
382 if (put_user(len, optlen))
388 void nfc_llcp_accept_unlink(struct sock *sk)
390 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
392 pr_debug("state %d\n", sk->sk_state);
394 list_del_init(&llcp_sock->accept_queue);
395 sk_acceptq_removed(llcp_sock->parent);
396 llcp_sock->parent = NULL;
401 void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk)
403 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
404 struct nfc_llcp_sock *llcp_sock_parent = nfc_llcp_sock(parent);
406 /* Lock will be free from unlink */
409 list_add_tail(&llcp_sock->accept_queue,
410 &llcp_sock_parent->accept_queue);
411 llcp_sock->parent = parent;
412 sk_acceptq_added(parent);
415 struct sock *nfc_llcp_accept_dequeue(struct sock *parent,
416 struct socket *newsock)
418 struct nfc_llcp_sock *lsk, *n, *llcp_parent;
421 llcp_parent = nfc_llcp_sock(parent);
423 list_for_each_entry_safe(lsk, n, &llcp_parent->accept_queue,
428 if (sk->sk_state == LLCP_CLOSED) {
430 nfc_llcp_accept_unlink(sk);
434 if (sk->sk_state == LLCP_CONNECTED || !newsock) {
435 list_del_init(&lsk->accept_queue);
439 sock_graft(sk, newsock);
443 pr_debug("Returning sk state %d\n", sk->sk_state);
445 sk_acceptq_removed(parent);
456 static int llcp_sock_accept(struct socket *sock, struct socket *newsock,
457 int flags, bool kern)
459 DECLARE_WAITQUEUE(wait, current);
460 struct sock *sk = sock->sk, *new_sk;
464 pr_debug("parent %p\n", sk);
466 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
468 if (sk->sk_state != LLCP_LISTEN) {
473 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
475 /* Wait for an incoming connection. */
476 add_wait_queue_exclusive(sk_sleep(sk), &wait);
477 while (!(new_sk = nfc_llcp_accept_dequeue(sk, newsock))) {
478 set_current_state(TASK_INTERRUPTIBLE);
485 if (signal_pending(current)) {
486 ret = sock_intr_errno(timeo);
491 timeo = schedule_timeout(timeo);
492 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
494 __set_current_state(TASK_RUNNING);
495 remove_wait_queue(sk_sleep(sk), &wait);
500 newsock->state = SS_CONNECTED;
502 pr_debug("new socket %p\n", new_sk);
510 static int llcp_sock_getname(struct socket *sock, struct sockaddr *uaddr,
513 struct sock *sk = sock->sk;
514 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
515 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, llcp_addr, uaddr);
517 if (llcp_sock == NULL || llcp_sock->dev == NULL)
520 pr_debug("%p %d %d %d\n", sk, llcp_sock->target_idx,
521 llcp_sock->dsap, llcp_sock->ssap);
523 memset(llcp_addr, 0, sizeof(*llcp_addr));
526 if (!llcp_sock->dev) {
530 llcp_addr->sa_family = AF_NFC;
531 llcp_addr->dev_idx = llcp_sock->dev->idx;
532 llcp_addr->target_idx = llcp_sock->target_idx;
533 llcp_addr->nfc_protocol = llcp_sock->nfc_protocol;
534 llcp_addr->dsap = llcp_sock->dsap;
535 llcp_addr->ssap = llcp_sock->ssap;
536 llcp_addr->service_name_len = llcp_sock->service_name_len;
537 memcpy(llcp_addr->service_name, llcp_sock->service_name,
538 llcp_addr->service_name_len);
541 return sizeof(struct sockaddr_nfc_llcp);
544 static inline __poll_t llcp_accept_poll(struct sock *parent)
546 struct nfc_llcp_sock *llcp_sock, *parent_sock;
549 parent_sock = nfc_llcp_sock(parent);
551 list_for_each_entry(llcp_sock, &parent_sock->accept_queue,
555 if (sk->sk_state == LLCP_CONNECTED)
556 return EPOLLIN | EPOLLRDNORM;
562 static __poll_t llcp_sock_poll(struct file *file, struct socket *sock,
565 struct sock *sk = sock->sk;
568 pr_debug("%p\n", sk);
570 sock_poll_wait(file, sock, wait);
572 if (sk->sk_state == LLCP_LISTEN)
573 return llcp_accept_poll(sk);
575 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
577 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
579 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
580 mask |= EPOLLIN | EPOLLRDNORM;
582 if (sk->sk_state == LLCP_CLOSED)
585 if (sk->sk_shutdown & RCV_SHUTDOWN)
586 mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
588 if (sk->sk_shutdown == SHUTDOWN_MASK)
591 if (sock_writeable(sk) && sk->sk_state == LLCP_CONNECTED)
592 mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
594 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
596 pr_debug("mask 0x%x\n", mask);
601 static int llcp_sock_release(struct socket *sock)
603 struct sock *sk = sock->sk;
604 struct nfc_llcp_local *local;
605 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
611 pr_debug("%p\n", sk);
613 local = llcp_sock->local;
622 if (sk->sk_state == LLCP_CONNECTED)
623 nfc_llcp_send_disconnect(llcp_sock);
625 if (sk->sk_state == LLCP_LISTEN) {
626 struct nfc_llcp_sock *lsk, *n;
627 struct sock *accept_sk;
629 list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue,
631 accept_sk = &lsk->sk;
632 lock_sock(accept_sk);
634 nfc_llcp_send_disconnect(lsk);
635 nfc_llcp_accept_unlink(accept_sk);
637 release_sock(accept_sk);
641 if (llcp_sock->reserved_ssap < LLCP_SAP_MAX)
642 nfc_llcp_put_ssap(llcp_sock->local, llcp_sock->ssap);
646 /* Keep this sock alive and therefore do not remove it from the sockets
647 * list until the DISC PDU has been actually sent. Otherwise we would
648 * reply with DM PDUs before sending the DISC one.
650 if (sk->sk_state == LLCP_DISCONNECTING)
653 if (sock->type == SOCK_RAW)
654 nfc_llcp_sock_unlink(&local->raw_sockets, sk);
656 nfc_llcp_sock_unlink(&local->sockets, sk);
665 static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr,
668 struct sock *sk = sock->sk;
669 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
670 struct sockaddr_nfc_llcp *addr = (struct sockaddr_nfc_llcp *)_addr;
672 struct nfc_llcp_local *local;
675 pr_debug("sock %p sk %p flags 0x%x\n", sock, sk, flags);
677 if (!addr || len < sizeof(*addr) || addr->sa_family != AF_NFC)
680 if (addr->service_name_len == 0 && addr->dsap == 0)
683 pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n", addr->dev_idx,
684 addr->target_idx, addr->nfc_protocol);
688 if (sk->sk_state == LLCP_CONNECTED) {
692 if (sk->sk_state == LLCP_CONNECTING) {
697 dev = nfc_get_device(addr->dev_idx);
703 local = nfc_llcp_find_local(dev);
709 device_lock(&dev->dev);
710 if (dev->dep_link_up == false) {
712 device_unlock(&dev->dev);
715 device_unlock(&dev->dev);
717 if (local->rf_mode == NFC_RF_INITIATOR &&
718 addr->target_idx != local->target_idx) {
723 llcp_sock->dev = dev;
724 llcp_sock->local = nfc_llcp_local_get(local);
725 llcp_sock->ssap = nfc_llcp_get_local_ssap(local);
726 if (llcp_sock->ssap == LLCP_SAP_MAX) {
727 nfc_llcp_local_put(llcp_sock->local);
728 llcp_sock->local = NULL;
733 llcp_sock->reserved_ssap = llcp_sock->ssap;
735 if (addr->service_name_len == 0)
736 llcp_sock->dsap = addr->dsap;
738 llcp_sock->dsap = LLCP_SAP_SDP;
739 llcp_sock->nfc_protocol = addr->nfc_protocol;
740 llcp_sock->service_name_len = min_t(unsigned int,
741 addr->service_name_len,
742 NFC_LLCP_MAX_SERVICE_NAME);
743 llcp_sock->service_name = kmemdup(addr->service_name,
744 llcp_sock->service_name_len,
747 nfc_llcp_sock_link(&local->connecting_sockets, sk);
749 ret = nfc_llcp_send_connect(llcp_sock);
753 sk->sk_state = LLCP_CONNECTING;
755 ret = sock_wait_state(sk, LLCP_CONNECTED,
756 sock_sndtimeo(sk, flags & O_NONBLOCK));
757 if (ret && ret != -EINPROGRESS)
765 nfc_llcp_put_ssap(local, llcp_sock->ssap);
766 nfc_llcp_local_put(llcp_sock->local);
767 llcp_sock->local = NULL;
769 nfc_llcp_sock_unlink(&local->connecting_sockets, sk);
770 kfree(llcp_sock->service_name);
771 llcp_sock->service_name = NULL;
781 static int llcp_sock_sendmsg(struct socket *sock, struct msghdr *msg,
784 struct sock *sk = sock->sk;
785 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
788 pr_debug("sock %p sk %p", sock, sk);
790 ret = sock_error(sk);
794 if (msg->msg_flags & MSG_OOB)
799 if (!llcp_sock->local) {
804 if (sk->sk_type == SOCK_DGRAM) {
805 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, addr,
808 if (msg->msg_namelen < sizeof(*addr)) {
815 return nfc_llcp_send_ui_frame(llcp_sock, addr->dsap, addr->ssap,
819 if (sk->sk_state != LLCP_CONNECTED) {
826 return nfc_llcp_send_i_frame(llcp_sock, msg, len);
829 static int llcp_sock_recvmsg(struct socket *sock, struct msghdr *msg,
830 size_t len, int flags)
832 int noblock = flags & MSG_DONTWAIT;
833 struct sock *sk = sock->sk;
834 unsigned int copied, rlen;
835 struct sk_buff *skb, *cskb;
838 pr_debug("%p %zu\n", sk, len);
842 if (sk->sk_state == LLCP_CLOSED &&
843 skb_queue_empty(&sk->sk_receive_queue)) {
850 if (flags & (MSG_OOB))
853 skb = skb_recv_datagram(sk, flags, noblock, &err);
855 pr_err("Recv datagram failed state %d %d %d",
856 sk->sk_state, err, sock_error(sk));
858 if (sk->sk_shutdown & RCV_SHUTDOWN)
864 rlen = skb->len; /* real length of skb */
865 copied = min_t(unsigned int, rlen, len);
868 if (skb_copy_datagram_msg(cskb, 0, msg, copied)) {
869 if (!(flags & MSG_PEEK))
870 skb_queue_head(&sk->sk_receive_queue, skb);
874 sock_recv_timestamp(msg, sk, skb);
876 if (sk->sk_type == SOCK_DGRAM && msg->msg_name) {
877 struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb);
878 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, sockaddr,
881 msg->msg_namelen = sizeof(struct sockaddr_nfc_llcp);
883 pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
885 memset(sockaddr, 0, sizeof(*sockaddr));
886 sockaddr->sa_family = AF_NFC;
887 sockaddr->nfc_protocol = NFC_PROTO_NFC_DEP;
888 sockaddr->dsap = ui_cb->dsap;
889 sockaddr->ssap = ui_cb->ssap;
892 /* Mark read part of skb as used */
893 if (!(flags & MSG_PEEK)) {
895 /* SOCK_STREAM: re-queue skb if it contains unreceived data */
896 if (sk->sk_type == SOCK_STREAM ||
897 sk->sk_type == SOCK_DGRAM ||
898 sk->sk_type == SOCK_RAW) {
899 skb_pull(skb, copied);
901 skb_queue_head(&sk->sk_receive_queue, skb);
909 /* XXX Queue backlogged skbs */
912 /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */
913 if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC))
919 static const struct proto_ops llcp_sock_ops = {
921 .owner = THIS_MODULE,
922 .bind = llcp_sock_bind,
923 .connect = llcp_sock_connect,
924 .release = llcp_sock_release,
925 .socketpair = sock_no_socketpair,
926 .accept = llcp_sock_accept,
927 .getname = llcp_sock_getname,
928 .poll = llcp_sock_poll,
929 .ioctl = sock_no_ioctl,
930 .listen = llcp_sock_listen,
931 .shutdown = sock_no_shutdown,
932 .setsockopt = nfc_llcp_setsockopt,
933 .getsockopt = nfc_llcp_getsockopt,
934 .sendmsg = llcp_sock_sendmsg,
935 .recvmsg = llcp_sock_recvmsg,
936 .mmap = sock_no_mmap,
939 static const struct proto_ops llcp_rawsock_ops = {
941 .owner = THIS_MODULE,
942 .bind = llcp_raw_sock_bind,
943 .connect = sock_no_connect,
944 .release = llcp_sock_release,
945 .socketpair = sock_no_socketpair,
946 .accept = sock_no_accept,
947 .getname = llcp_sock_getname,
948 .poll = llcp_sock_poll,
949 .ioctl = sock_no_ioctl,
950 .listen = sock_no_listen,
951 .shutdown = sock_no_shutdown,
952 .setsockopt = sock_no_setsockopt,
953 .getsockopt = sock_no_getsockopt,
954 .sendmsg = sock_no_sendmsg,
955 .recvmsg = llcp_sock_recvmsg,
956 .mmap = sock_no_mmap,
959 static void llcp_sock_destruct(struct sock *sk)
961 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
963 pr_debug("%p\n", sk);
965 if (sk->sk_state == LLCP_CONNECTED)
966 nfc_put_device(llcp_sock->dev);
968 skb_queue_purge(&sk->sk_receive_queue);
970 nfc_llcp_sock_free(llcp_sock);
972 if (!sock_flag(sk, SOCK_DEAD)) {
973 pr_err("Freeing alive NFC LLCP socket %p\n", sk);
978 struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern)
981 struct nfc_llcp_sock *llcp_sock;
983 sk = sk_alloc(&init_net, PF_NFC, gfp, &llcp_sock_proto, kern);
987 llcp_sock = nfc_llcp_sock(sk);
989 sock_init_data(sock, sk);
990 sk->sk_state = LLCP_CLOSED;
991 sk->sk_protocol = NFC_SOCKPROTO_LLCP;
993 sk->sk_destruct = llcp_sock_destruct;
996 llcp_sock->dsap = LLCP_SAP_SDP;
997 llcp_sock->rw = LLCP_MAX_RW + 1;
998 llcp_sock->miux = cpu_to_be16(LLCP_MAX_MIUX + 1);
999 llcp_sock->send_n = llcp_sock->send_ack_n = 0;
1000 llcp_sock->recv_n = llcp_sock->recv_ack_n = 0;
1001 llcp_sock->remote_ready = 1;
1002 llcp_sock->reserved_ssap = LLCP_SAP_MAX;
1003 nfc_llcp_socket_remote_param_init(llcp_sock);
1004 skb_queue_head_init(&llcp_sock->tx_queue);
1005 skb_queue_head_init(&llcp_sock->tx_pending_queue);
1006 INIT_LIST_HEAD(&llcp_sock->accept_queue);
1009 sock->state = SS_UNCONNECTED;
1014 void nfc_llcp_sock_free(struct nfc_llcp_sock *sock)
1016 kfree(sock->service_name);
1018 skb_queue_purge(&sock->tx_queue);
1019 skb_queue_purge(&sock->tx_pending_queue);
1021 list_del_init(&sock->accept_queue);
1023 sock->parent = NULL;
1025 nfc_llcp_local_put(sock->local);
1028 static int llcp_sock_create(struct net *net, struct socket *sock,
1029 const struct nfc_protocol *nfc_proto, int kern)
1033 pr_debug("%p\n", sock);
1035 if (sock->type != SOCK_STREAM &&
1036 sock->type != SOCK_DGRAM &&
1037 sock->type != SOCK_RAW)
1038 return -ESOCKTNOSUPPORT;
1040 if (sock->type == SOCK_RAW) {
1041 if (!capable(CAP_NET_RAW))
1043 sock->ops = &llcp_rawsock_ops;
1045 sock->ops = &llcp_sock_ops;
1048 sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC, kern);
1055 static const struct nfc_protocol llcp_nfc_proto = {
1056 .id = NFC_SOCKPROTO_LLCP,
1057 .proto = &llcp_sock_proto,
1058 .owner = THIS_MODULE,
1059 .create = llcp_sock_create
1062 int __init nfc_llcp_sock_init(void)
1064 return nfc_proto_register(&llcp_nfc_proto);
1067 void nfc_llcp_sock_exit(void)
1069 nfc_proto_unregister(&llcp_nfc_proto);