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));
524 *len = sizeof(struct sockaddr_nfc_llcp);
527 if (!llcp_sock->dev) {
531 llcp_addr->sa_family = AF_NFC;
532 llcp_addr->dev_idx = llcp_sock->dev->idx;
533 llcp_addr->target_idx = llcp_sock->target_idx;
534 llcp_addr->nfc_protocol = llcp_sock->nfc_protocol;
535 llcp_addr->dsap = llcp_sock->dsap;
536 llcp_addr->ssap = llcp_sock->ssap;
537 llcp_addr->service_name_len = llcp_sock->service_name_len;
538 memcpy(llcp_addr->service_name, llcp_sock->service_name,
539 llcp_addr->service_name_len);
545 static inline unsigned int llcp_accept_poll(struct sock *parent)
547 struct nfc_llcp_sock *llcp_sock, *parent_sock;
550 parent_sock = nfc_llcp_sock(parent);
552 list_for_each_entry(llcp_sock, &parent_sock->accept_queue,
556 if (sk->sk_state == LLCP_CONNECTED)
557 return POLLIN | POLLRDNORM;
563 static unsigned int llcp_sock_poll(struct file *file, struct socket *sock,
566 struct sock *sk = sock->sk;
567 unsigned int mask = 0;
569 pr_debug("%p\n", sk);
571 sock_poll_wait(file, sk_sleep(sk), wait);
573 if (sk->sk_state == LLCP_LISTEN)
574 return llcp_accept_poll(sk);
576 if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
578 (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0);
580 if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
581 mask |= POLLIN | POLLRDNORM;
583 if (sk->sk_state == LLCP_CLOSED)
586 if (sk->sk_shutdown & RCV_SHUTDOWN)
587 mask |= POLLRDHUP | POLLIN | POLLRDNORM;
589 if (sk->sk_shutdown == SHUTDOWN_MASK)
592 if (sock_writeable(sk) && sk->sk_state == LLCP_CONNECTED)
593 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
595 sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
597 pr_debug("mask 0x%x\n", mask);
602 static int llcp_sock_release(struct socket *sock)
604 struct sock *sk = sock->sk;
605 struct nfc_llcp_local *local;
606 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
612 pr_debug("%p\n", sk);
614 local = llcp_sock->local;
623 if (sk->sk_state == LLCP_CONNECTED)
624 nfc_llcp_send_disconnect(llcp_sock);
626 if (sk->sk_state == LLCP_LISTEN) {
627 struct nfc_llcp_sock *lsk, *n;
628 struct sock *accept_sk;
630 list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue,
632 accept_sk = &lsk->sk;
633 lock_sock(accept_sk);
635 nfc_llcp_send_disconnect(lsk);
636 nfc_llcp_accept_unlink(accept_sk);
638 release_sock(accept_sk);
642 if (llcp_sock->reserved_ssap < LLCP_SAP_MAX)
643 nfc_llcp_put_ssap(llcp_sock->local, llcp_sock->ssap);
647 /* Keep this sock alive and therefore do not remove it from the sockets
648 * list until the DISC PDU has been actually sent. Otherwise we would
649 * reply with DM PDUs before sending the DISC one.
651 if (sk->sk_state == LLCP_DISCONNECTING)
654 if (sock->type == SOCK_RAW)
655 nfc_llcp_sock_unlink(&local->raw_sockets, sk);
657 nfc_llcp_sock_unlink(&local->sockets, sk);
666 static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr,
669 struct sock *sk = sock->sk;
670 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
671 struct sockaddr_nfc_llcp *addr = (struct sockaddr_nfc_llcp *)_addr;
673 struct nfc_llcp_local *local;
676 pr_debug("sock %p sk %p flags 0x%x\n", sock, sk, flags);
678 if (!addr || len < sizeof(*addr) || addr->sa_family != AF_NFC)
681 if (addr->service_name_len == 0 && addr->dsap == 0)
684 pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n", addr->dev_idx,
685 addr->target_idx, addr->nfc_protocol);
689 if (sk->sk_state == LLCP_CONNECTED) {
693 if (sk->sk_state == LLCP_CONNECTING) {
698 dev = nfc_get_device(addr->dev_idx);
704 local = nfc_llcp_find_local(dev);
710 device_lock(&dev->dev);
711 if (dev->dep_link_up == false) {
713 device_unlock(&dev->dev);
716 device_unlock(&dev->dev);
718 if (local->rf_mode == NFC_RF_INITIATOR &&
719 addr->target_idx != local->target_idx) {
724 llcp_sock->dev = dev;
725 llcp_sock->local = nfc_llcp_local_get(local);
726 llcp_sock->ssap = nfc_llcp_get_local_ssap(local);
727 if (llcp_sock->ssap == LLCP_SAP_MAX) {
728 nfc_llcp_local_put(llcp_sock->local);
729 llcp_sock->local = NULL;
734 llcp_sock->reserved_ssap = llcp_sock->ssap;
736 if (addr->service_name_len == 0)
737 llcp_sock->dsap = addr->dsap;
739 llcp_sock->dsap = LLCP_SAP_SDP;
740 llcp_sock->nfc_protocol = addr->nfc_protocol;
741 llcp_sock->service_name_len = min_t(unsigned int,
742 addr->service_name_len,
743 NFC_LLCP_MAX_SERVICE_NAME);
744 llcp_sock->service_name = kmemdup(addr->service_name,
745 llcp_sock->service_name_len,
748 nfc_llcp_sock_link(&local->connecting_sockets, sk);
750 ret = nfc_llcp_send_connect(llcp_sock);
754 sk->sk_state = LLCP_CONNECTING;
756 ret = sock_wait_state(sk, LLCP_CONNECTED,
757 sock_sndtimeo(sk, flags & O_NONBLOCK));
758 if (ret && ret != -EINPROGRESS)
766 nfc_llcp_put_ssap(local, llcp_sock->ssap);
767 nfc_llcp_local_put(llcp_sock->local);
768 llcp_sock->local = NULL;
770 nfc_llcp_sock_unlink(&local->connecting_sockets, sk);
771 kfree(llcp_sock->service_name);
772 llcp_sock->service_name = NULL;
782 static int llcp_sock_sendmsg(struct socket *sock, struct msghdr *msg,
785 struct sock *sk = sock->sk;
786 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
789 pr_debug("sock %p sk %p", sock, sk);
791 ret = sock_error(sk);
795 if (msg->msg_flags & MSG_OOB)
800 if (!llcp_sock->local) {
805 if (sk->sk_type == SOCK_DGRAM) {
806 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, addr,
809 if (msg->msg_namelen < sizeof(*addr)) {
816 return nfc_llcp_send_ui_frame(llcp_sock, addr->dsap, addr->ssap,
820 if (sk->sk_state != LLCP_CONNECTED) {
827 return nfc_llcp_send_i_frame(llcp_sock, msg, len);
830 static int llcp_sock_recvmsg(struct socket *sock, struct msghdr *msg,
831 size_t len, int flags)
833 int noblock = flags & MSG_DONTWAIT;
834 struct sock *sk = sock->sk;
835 unsigned int copied, rlen;
836 struct sk_buff *skb, *cskb;
839 pr_debug("%p %zu\n", sk, len);
843 if (sk->sk_state == LLCP_CLOSED &&
844 skb_queue_empty(&sk->sk_receive_queue)) {
851 if (flags & (MSG_OOB))
854 skb = skb_recv_datagram(sk, flags, noblock, &err);
856 pr_err("Recv datagram failed state %d %d %d",
857 sk->sk_state, err, sock_error(sk));
859 if (sk->sk_shutdown & RCV_SHUTDOWN)
865 rlen = skb->len; /* real length of skb */
866 copied = min_t(unsigned int, rlen, len);
869 if (skb_copy_datagram_msg(cskb, 0, msg, copied)) {
870 if (!(flags & MSG_PEEK))
871 skb_queue_head(&sk->sk_receive_queue, skb);
875 sock_recv_timestamp(msg, sk, skb);
877 if (sk->sk_type == SOCK_DGRAM && msg->msg_name) {
878 struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb);
879 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, sockaddr,
882 msg->msg_namelen = sizeof(struct sockaddr_nfc_llcp);
884 pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
886 memset(sockaddr, 0, sizeof(*sockaddr));
887 sockaddr->sa_family = AF_NFC;
888 sockaddr->nfc_protocol = NFC_PROTO_NFC_DEP;
889 sockaddr->dsap = ui_cb->dsap;
890 sockaddr->ssap = ui_cb->ssap;
893 /* Mark read part of skb as used */
894 if (!(flags & MSG_PEEK)) {
896 /* SOCK_STREAM: re-queue skb if it contains unreceived data */
897 if (sk->sk_type == SOCK_STREAM ||
898 sk->sk_type == SOCK_DGRAM ||
899 sk->sk_type == SOCK_RAW) {
900 skb_pull(skb, copied);
902 skb_queue_head(&sk->sk_receive_queue, skb);
910 /* XXX Queue backlogged skbs */
913 /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */
914 if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC))
920 static const struct proto_ops llcp_sock_ops = {
922 .owner = THIS_MODULE,
923 .bind = llcp_sock_bind,
924 .connect = llcp_sock_connect,
925 .release = llcp_sock_release,
926 .socketpair = sock_no_socketpair,
927 .accept = llcp_sock_accept,
928 .getname = llcp_sock_getname,
929 .poll = llcp_sock_poll,
930 .ioctl = sock_no_ioctl,
931 .listen = llcp_sock_listen,
932 .shutdown = sock_no_shutdown,
933 .setsockopt = nfc_llcp_setsockopt,
934 .getsockopt = nfc_llcp_getsockopt,
935 .sendmsg = llcp_sock_sendmsg,
936 .recvmsg = llcp_sock_recvmsg,
937 .mmap = sock_no_mmap,
940 static const struct proto_ops llcp_rawsock_ops = {
942 .owner = THIS_MODULE,
943 .bind = llcp_raw_sock_bind,
944 .connect = sock_no_connect,
945 .release = llcp_sock_release,
946 .socketpair = sock_no_socketpair,
947 .accept = sock_no_accept,
948 .getname = llcp_sock_getname,
949 .poll = llcp_sock_poll,
950 .ioctl = sock_no_ioctl,
951 .listen = sock_no_listen,
952 .shutdown = sock_no_shutdown,
953 .setsockopt = sock_no_setsockopt,
954 .getsockopt = sock_no_getsockopt,
955 .sendmsg = sock_no_sendmsg,
956 .recvmsg = llcp_sock_recvmsg,
957 .mmap = sock_no_mmap,
960 static void llcp_sock_destruct(struct sock *sk)
962 struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
964 pr_debug("%p\n", sk);
966 if (sk->sk_state == LLCP_CONNECTED)
967 nfc_put_device(llcp_sock->dev);
969 skb_queue_purge(&sk->sk_receive_queue);
971 nfc_llcp_sock_free(llcp_sock);
973 if (!sock_flag(sk, SOCK_DEAD)) {
974 pr_err("Freeing alive NFC LLCP socket %p\n", sk);
979 struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern)
982 struct nfc_llcp_sock *llcp_sock;
984 sk = sk_alloc(&init_net, PF_NFC, gfp, &llcp_sock_proto, kern);
988 llcp_sock = nfc_llcp_sock(sk);
990 sock_init_data(sock, sk);
991 sk->sk_state = LLCP_CLOSED;
992 sk->sk_protocol = NFC_SOCKPROTO_LLCP;
994 sk->sk_destruct = llcp_sock_destruct;
997 llcp_sock->dsap = LLCP_SAP_SDP;
998 llcp_sock->rw = LLCP_MAX_RW + 1;
999 llcp_sock->miux = cpu_to_be16(LLCP_MAX_MIUX + 1);
1000 llcp_sock->send_n = llcp_sock->send_ack_n = 0;
1001 llcp_sock->recv_n = llcp_sock->recv_ack_n = 0;
1002 llcp_sock->remote_ready = 1;
1003 llcp_sock->reserved_ssap = LLCP_SAP_MAX;
1004 nfc_llcp_socket_remote_param_init(llcp_sock);
1005 skb_queue_head_init(&llcp_sock->tx_queue);
1006 skb_queue_head_init(&llcp_sock->tx_pending_queue);
1007 INIT_LIST_HEAD(&llcp_sock->accept_queue);
1010 sock->state = SS_UNCONNECTED;
1015 void nfc_llcp_sock_free(struct nfc_llcp_sock *sock)
1017 kfree(sock->service_name);
1019 skb_queue_purge(&sock->tx_queue);
1020 skb_queue_purge(&sock->tx_pending_queue);
1022 list_del_init(&sock->accept_queue);
1024 sock->parent = NULL;
1026 nfc_llcp_local_put(sock->local);
1029 static int llcp_sock_create(struct net *net, struct socket *sock,
1030 const struct nfc_protocol *nfc_proto, int kern)
1034 pr_debug("%p\n", sock);
1036 if (sock->type != SOCK_STREAM &&
1037 sock->type != SOCK_DGRAM &&
1038 sock->type != SOCK_RAW)
1039 return -ESOCKTNOSUPPORT;
1041 if (sock->type == SOCK_RAW) {
1042 if (!capable(CAP_NET_RAW))
1044 sock->ops = &llcp_rawsock_ops;
1046 sock->ops = &llcp_sock_ops;
1049 sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC, kern);
1056 static const struct nfc_protocol llcp_nfc_proto = {
1057 .id = NFC_SOCKPROTO_LLCP,
1058 .proto = &llcp_sock_proto,
1059 .owner = THIS_MODULE,
1060 .create = llcp_sock_create
1063 int __init nfc_llcp_sock_init(void)
1065 return nfc_proto_register(&llcp_nfc_proto);
1068 void nfc_llcp_sock_exit(void)
1070 nfc_proto_unregister(&llcp_nfc_proto);