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, write to the
16 * Free Software Foundation, Inc.,
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 #define pr_fmt(fmt) "llcp: %s: " fmt, __func__
22 #include <linux/init.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/nfc.h>
30 static int sock_wait_state(struct sock
*sk
, int state
, unsigned long timeo
)
32 DECLARE_WAITQUEUE(wait
, current
);
35 pr_debug("sk %p", sk
);
37 add_wait_queue(sk_sleep(sk
), &wait
);
38 set_current_state(TASK_INTERRUPTIBLE
);
40 while (sk
->sk_state
!= state
) {
46 if (signal_pending(current
)) {
47 err
= sock_intr_errno(timeo
);
52 timeo
= schedule_timeout(timeo
);
54 set_current_state(TASK_INTERRUPTIBLE
);
61 __set_current_state(TASK_RUNNING
);
62 remove_wait_queue(sk_sleep(sk
), &wait
);
66 static struct proto llcp_sock_proto
= {
69 .obj_size
= sizeof(struct nfc_llcp_sock
),
72 static int llcp_sock_bind(struct socket
*sock
, struct sockaddr
*addr
, int alen
)
74 struct sock
*sk
= sock
->sk
;
75 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
76 struct nfc_llcp_local
*local
;
78 struct sockaddr_nfc_llcp llcp_addr
;
81 if (!addr
|| 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
|| addr
->sa_family
!= AF_NFC
)
158 pr_debug("sk %p addr %p family %d\n", sk
, addr
, addr
->sa_family
);
160 memset(&llcp_addr
, 0, sizeof(llcp_addr
));
161 len
= min_t(unsigned int, sizeof(llcp_addr
), alen
);
162 memcpy(&llcp_addr
, addr
, len
);
166 if (sk
->sk_state
!= LLCP_CLOSED
) {
171 dev
= nfc_get_device(llcp_addr
.dev_idx
);
177 local
= nfc_llcp_find_local(dev
);
183 llcp_sock
->dev
= dev
;
184 llcp_sock
->local
= nfc_llcp_local_get(local
);
185 llcp_sock
->nfc_protocol
= llcp_addr
.nfc_protocol
;
187 nfc_llcp_sock_link(&local
->raw_sockets
, sk
);
189 sk
->sk_state
= LLCP_BOUND
;
199 static int llcp_sock_listen(struct socket
*sock
, int backlog
)
201 struct sock
*sk
= sock
->sk
;
204 pr_debug("sk %p backlog %d\n", sk
, backlog
);
208 if ((sock
->type
!= SOCK_SEQPACKET
&& sock
->type
!= SOCK_STREAM
) ||
209 sk
->sk_state
!= LLCP_BOUND
) {
214 sk
->sk_max_ack_backlog
= backlog
;
215 sk
->sk_ack_backlog
= 0;
217 pr_debug("Socket listening\n");
218 sk
->sk_state
= LLCP_LISTEN
;
226 static int nfc_llcp_setsockopt(struct socket
*sock
, int level
, int optname
,
227 char __user
*optval
, unsigned int optlen
)
229 struct sock
*sk
= sock
->sk
;
230 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
234 pr_debug("%p optname %d\n", sk
, optname
);
236 if (level
!= SOL_NFC
)
243 if (sk
->sk_state
== LLCP_CONNECTED
||
244 sk
->sk_state
== LLCP_BOUND
||
245 sk
->sk_state
== LLCP_LISTEN
) {
250 if (get_user(opt
, (u32 __user
*) optval
)) {
255 if (opt
> LLCP_MAX_RW
) {
260 llcp_sock
->rw
= (u8
) opt
;
265 if (sk
->sk_state
== LLCP_CONNECTED
||
266 sk
->sk_state
== LLCP_BOUND
||
267 sk
->sk_state
== LLCP_LISTEN
) {
272 if (get_user(opt
, (u32 __user
*) optval
)) {
277 if (opt
> LLCP_MAX_MIUX
) {
282 llcp_sock
->miux
= cpu_to_be16((u16
) opt
);
293 pr_debug("%p rw %d miux %d\n", llcp_sock
,
294 llcp_sock
->rw
, llcp_sock
->miux
);
299 static int nfc_llcp_getsockopt(struct socket
*sock
, int level
, int optname
,
300 char __user
*optval
, int __user
*optlen
)
302 struct nfc_llcp_local
*local
;
303 struct sock
*sk
= sock
->sk
;
304 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
306 u16 miux
, remote_miu
;
309 pr_debug("%p optname %d\n", sk
, optname
);
311 if (level
!= SOL_NFC
)
314 if (get_user(len
, optlen
))
317 local
= llcp_sock
->local
;
321 len
= min_t(u32
, len
, sizeof(u32
));
327 rw
= llcp_sock
->rw
> LLCP_MAX_RW
? local
->rw
: llcp_sock
->rw
;
328 if (put_user(rw
, (u32 __user
*) optval
))
334 miux
= be16_to_cpu(llcp_sock
->miux
) > LLCP_MAX_MIUX
?
335 be16_to_cpu(local
->miux
) : be16_to_cpu(llcp_sock
->miux
);
337 if (put_user(miux
, (u32 __user
*) optval
))
342 case NFC_LLCP_REMOTE_MIU
:
343 remote_miu
= llcp_sock
->remote_miu
> LLCP_MAX_MIU
?
344 local
->remote_miu
: llcp_sock
->remote_miu
;
346 if (put_user(remote_miu
, (u32 __user
*) optval
))
351 case NFC_LLCP_REMOTE_LTO
:
352 if (put_user(local
->remote_lto
/ 10, (u32 __user
*) optval
))
357 case NFC_LLCP_REMOTE_RW
:
358 if (put_user(llcp_sock
->remote_rw
, (u32 __user
*) optval
))
370 if (put_user(len
, optlen
))
376 void nfc_llcp_accept_unlink(struct sock
*sk
)
378 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
380 pr_debug("state %d\n", sk
->sk_state
);
382 list_del_init(&llcp_sock
->accept_queue
);
383 sk_acceptq_removed(llcp_sock
->parent
);
384 llcp_sock
->parent
= NULL
;
389 void nfc_llcp_accept_enqueue(struct sock
*parent
, struct sock
*sk
)
391 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
392 struct nfc_llcp_sock
*llcp_sock_parent
= nfc_llcp_sock(parent
);
394 /* Lock will be free from unlink */
397 list_add_tail(&llcp_sock
->accept_queue
,
398 &llcp_sock_parent
->accept_queue
);
399 llcp_sock
->parent
= parent
;
400 sk_acceptq_added(parent
);
403 struct sock
*nfc_llcp_accept_dequeue(struct sock
*parent
,
404 struct socket
*newsock
)
406 struct nfc_llcp_sock
*lsk
, *n
, *llcp_parent
;
409 llcp_parent
= nfc_llcp_sock(parent
);
411 list_for_each_entry_safe(lsk
, n
, &llcp_parent
->accept_queue
,
416 if (sk
->sk_state
== LLCP_CLOSED
) {
418 nfc_llcp_accept_unlink(sk
);
422 if (sk
->sk_state
== LLCP_CONNECTED
|| !newsock
) {
423 list_del_init(&lsk
->accept_queue
);
427 sock_graft(sk
, newsock
);
431 pr_debug("Returning sk state %d\n", sk
->sk_state
);
433 sk_acceptq_removed(parent
);
444 static int llcp_sock_accept(struct socket
*sock
, struct socket
*newsock
,
447 DECLARE_WAITQUEUE(wait
, current
);
448 struct sock
*sk
= sock
->sk
, *new_sk
;
452 pr_debug("parent %p\n", sk
);
454 lock_sock_nested(sk
, SINGLE_DEPTH_NESTING
);
456 if (sk
->sk_state
!= LLCP_LISTEN
) {
461 timeo
= sock_rcvtimeo(sk
, flags
& O_NONBLOCK
);
463 /* Wait for an incoming connection. */
464 add_wait_queue_exclusive(sk_sleep(sk
), &wait
);
465 while (!(new_sk
= nfc_llcp_accept_dequeue(sk
, newsock
))) {
466 set_current_state(TASK_INTERRUPTIBLE
);
473 if (signal_pending(current
)) {
474 ret
= sock_intr_errno(timeo
);
479 timeo
= schedule_timeout(timeo
);
480 lock_sock_nested(sk
, SINGLE_DEPTH_NESTING
);
482 __set_current_state(TASK_RUNNING
);
483 remove_wait_queue(sk_sleep(sk
), &wait
);
488 newsock
->state
= SS_CONNECTED
;
490 pr_debug("new socket %p\n", new_sk
);
498 static int llcp_sock_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
501 struct sock
*sk
= sock
->sk
;
502 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
503 DECLARE_SOCKADDR(struct sockaddr_nfc_llcp
*, llcp_addr
, uaddr
);
505 if (llcp_sock
== NULL
|| llcp_sock
->dev
== NULL
)
508 pr_debug("%p %d %d %d\n", sk
, llcp_sock
->target_idx
,
509 llcp_sock
->dsap
, llcp_sock
->ssap
);
511 uaddr
->sa_family
= AF_NFC
;
513 *len
= sizeof(struct sockaddr_nfc_llcp
);
515 llcp_addr
->dev_idx
= llcp_sock
->dev
->idx
;
516 llcp_addr
->target_idx
= llcp_sock
->target_idx
;
517 llcp_addr
->dsap
= llcp_sock
->dsap
;
518 llcp_addr
->ssap
= llcp_sock
->ssap
;
519 llcp_addr
->service_name_len
= llcp_sock
->service_name_len
;
520 memcpy(llcp_addr
->service_name
, llcp_sock
->service_name
,
521 llcp_addr
->service_name_len
);
526 static inline unsigned int llcp_accept_poll(struct sock
*parent
)
528 struct nfc_llcp_sock
*llcp_sock
, *n
, *parent_sock
;
531 parent_sock
= nfc_llcp_sock(parent
);
533 list_for_each_entry_safe(llcp_sock
, n
, &parent_sock
->accept_queue
,
537 if (sk
->sk_state
== LLCP_CONNECTED
)
538 return POLLIN
| POLLRDNORM
;
544 static unsigned int llcp_sock_poll(struct file
*file
, struct socket
*sock
,
547 struct sock
*sk
= sock
->sk
;
548 unsigned int mask
= 0;
550 pr_debug("%p\n", sk
);
552 sock_poll_wait(file
, sk_sleep(sk
), wait
);
554 if (sk
->sk_state
== LLCP_LISTEN
)
555 return llcp_accept_poll(sk
);
557 if (sk
->sk_err
|| !skb_queue_empty(&sk
->sk_error_queue
))
559 (sock_flag(sk
, SOCK_SELECT_ERR_QUEUE
) ? POLLPRI
: 0);
561 if (!skb_queue_empty(&sk
->sk_receive_queue
))
562 mask
|= POLLIN
| POLLRDNORM
;
564 if (sk
->sk_state
== LLCP_CLOSED
)
567 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
568 mask
|= POLLRDHUP
| POLLIN
| POLLRDNORM
;
570 if (sk
->sk_shutdown
== SHUTDOWN_MASK
)
573 if (sock_writeable(sk
))
574 mask
|= POLLOUT
| POLLWRNORM
| POLLWRBAND
;
576 set_bit(SOCK_ASYNC_NOSPACE
, &sk
->sk_socket
->flags
);
578 pr_debug("mask 0x%x\n", mask
);
583 static int llcp_sock_release(struct socket
*sock
)
585 struct sock
*sk
= sock
->sk
;
586 struct nfc_llcp_local
*local
;
587 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
593 pr_debug("%p\n", sk
);
595 local
= llcp_sock
->local
;
604 if (sk
->sk_state
== LLCP_CONNECTED
)
605 nfc_llcp_disconnect(llcp_sock
);
607 if (sk
->sk_state
== LLCP_LISTEN
) {
608 struct nfc_llcp_sock
*lsk
, *n
;
609 struct sock
*accept_sk
;
611 list_for_each_entry_safe(lsk
, n
, &llcp_sock
->accept_queue
,
613 accept_sk
= &lsk
->sk
;
614 lock_sock(accept_sk
);
616 nfc_llcp_disconnect(lsk
);
617 nfc_llcp_accept_unlink(accept_sk
);
619 release_sock(accept_sk
);
623 if (llcp_sock
->reserved_ssap
< LLCP_SAP_MAX
)
624 nfc_llcp_put_ssap(llcp_sock
->local
, llcp_sock
->ssap
);
628 if (sock
->type
== SOCK_RAW
)
629 nfc_llcp_sock_unlink(&local
->raw_sockets
, sk
);
631 nfc_llcp_sock_unlink(&local
->sockets
, sk
);
640 static int llcp_sock_connect(struct socket
*sock
, struct sockaddr
*_addr
,
643 struct sock
*sk
= sock
->sk
;
644 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
645 struct sockaddr_nfc_llcp
*addr
= (struct sockaddr_nfc_llcp
*)_addr
;
647 struct nfc_llcp_local
*local
;
650 pr_debug("sock %p sk %p flags 0x%x\n", sock
, sk
, flags
);
652 if (!addr
|| len
< sizeof(struct sockaddr_nfc
) ||
653 addr
->sa_family
!= AF_NFC
)
656 if (addr
->service_name_len
== 0 && addr
->dsap
== 0)
659 pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n", addr
->dev_idx
,
660 addr
->target_idx
, addr
->nfc_protocol
);
664 if (sk
->sk_state
== LLCP_CONNECTED
) {
669 dev
= nfc_get_device(addr
->dev_idx
);
675 local
= nfc_llcp_find_local(dev
);
681 device_lock(&dev
->dev
);
682 if (dev
->dep_link_up
== false) {
684 device_unlock(&dev
->dev
);
687 device_unlock(&dev
->dev
);
689 if (local
->rf_mode
== NFC_RF_INITIATOR
&&
690 addr
->target_idx
!= local
->target_idx
) {
695 llcp_sock
->dev
= dev
;
696 llcp_sock
->local
= nfc_llcp_local_get(local
);
697 llcp_sock
->remote_miu
= llcp_sock
->local
->remote_miu
;
698 llcp_sock
->ssap
= nfc_llcp_get_local_ssap(local
);
699 if (llcp_sock
->ssap
== LLCP_SAP_MAX
) {
704 llcp_sock
->reserved_ssap
= llcp_sock
->ssap
;
706 if (addr
->service_name_len
== 0)
707 llcp_sock
->dsap
= addr
->dsap
;
709 llcp_sock
->dsap
= LLCP_SAP_SDP
;
710 llcp_sock
->nfc_protocol
= addr
->nfc_protocol
;
711 llcp_sock
->service_name_len
= min_t(unsigned int,
712 addr
->service_name_len
,
713 NFC_LLCP_MAX_SERVICE_NAME
);
714 llcp_sock
->service_name
= kmemdup(addr
->service_name
,
715 llcp_sock
->service_name_len
,
718 nfc_llcp_sock_link(&local
->connecting_sockets
, sk
);
720 ret
= nfc_llcp_send_connect(llcp_sock
);
724 ret
= sock_wait_state(sk
, LLCP_CONNECTED
,
725 sock_sndtimeo(sk
, flags
& O_NONBLOCK
));
734 nfc_llcp_put_ssap(local
, llcp_sock
->ssap
);
736 nfc_llcp_sock_unlink(&local
->connecting_sockets
, sk
);
746 static int llcp_sock_sendmsg(struct kiocb
*iocb
, struct socket
*sock
,
747 struct msghdr
*msg
, size_t len
)
749 struct sock
*sk
= sock
->sk
;
750 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
753 pr_debug("sock %p sk %p", sock
, sk
);
755 ret
= sock_error(sk
);
759 if (msg
->msg_flags
& MSG_OOB
)
764 if (sk
->sk_type
== SOCK_DGRAM
) {
765 struct sockaddr_nfc_llcp
*addr
=
766 (struct sockaddr_nfc_llcp
*)msg
->msg_name
;
768 if (msg
->msg_namelen
< sizeof(*addr
)) {
775 return nfc_llcp_send_ui_frame(llcp_sock
, addr
->dsap
, addr
->ssap
,
779 if (sk
->sk_state
!= LLCP_CONNECTED
) {
786 return nfc_llcp_send_i_frame(llcp_sock
, msg
, len
);
789 static int llcp_sock_recvmsg(struct kiocb
*iocb
, struct socket
*sock
,
790 struct msghdr
*msg
, size_t len
, int flags
)
792 int noblock
= flags
& MSG_DONTWAIT
;
793 struct sock
*sk
= sock
->sk
;
794 unsigned int copied
, rlen
;
795 struct sk_buff
*skb
, *cskb
;
798 pr_debug("%p %zu\n", sk
, len
);
800 msg
->msg_namelen
= 0;
804 if (sk
->sk_state
== LLCP_CLOSED
&&
805 skb_queue_empty(&sk
->sk_receive_queue
)) {
812 if (flags
& (MSG_OOB
))
815 skb
= skb_recv_datagram(sk
, flags
, noblock
, &err
);
817 pr_err("Recv datagram failed state %d %d %d",
818 sk
->sk_state
, err
, sock_error(sk
));
820 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
826 rlen
= skb
->len
; /* real length of skb */
827 copied
= min_t(unsigned int, rlen
, len
);
830 if (skb_copy_datagram_iovec(cskb
, 0, msg
->msg_iov
, copied
)) {
831 if (!(flags
& MSG_PEEK
))
832 skb_queue_head(&sk
->sk_receive_queue
, skb
);
836 sock_recv_timestamp(msg
, sk
, skb
);
838 if (sk
->sk_type
== SOCK_DGRAM
&& msg
->msg_name
) {
839 struct nfc_llcp_ui_cb
*ui_cb
= nfc_llcp_ui_skb_cb(skb
);
840 struct sockaddr_nfc_llcp
*sockaddr
=
841 (struct sockaddr_nfc_llcp
*) msg
->msg_name
;
843 msg
->msg_namelen
= sizeof(struct sockaddr_nfc_llcp
);
845 pr_debug("Datagram socket %d %d\n", ui_cb
->dsap
, ui_cb
->ssap
);
847 memset(sockaddr
, 0, sizeof(*sockaddr
));
848 sockaddr
->sa_family
= AF_NFC
;
849 sockaddr
->nfc_protocol
= NFC_PROTO_NFC_DEP
;
850 sockaddr
->dsap
= ui_cb
->dsap
;
851 sockaddr
->ssap
= ui_cb
->ssap
;
854 /* Mark read part of skb as used */
855 if (!(flags
& MSG_PEEK
)) {
857 /* SOCK_STREAM: re-queue skb if it contains unreceived data */
858 if (sk
->sk_type
== SOCK_STREAM
||
859 sk
->sk_type
== SOCK_DGRAM
||
860 sk
->sk_type
== SOCK_RAW
) {
861 skb_pull(skb
, copied
);
863 skb_queue_head(&sk
->sk_receive_queue
, skb
);
871 /* XXX Queue backlogged skbs */
874 /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */
875 if (sk
->sk_type
== SOCK_SEQPACKET
&& (flags
& MSG_TRUNC
))
881 static const struct proto_ops llcp_sock_ops
= {
883 .owner
= THIS_MODULE
,
884 .bind
= llcp_sock_bind
,
885 .connect
= llcp_sock_connect
,
886 .release
= llcp_sock_release
,
887 .socketpair
= sock_no_socketpair
,
888 .accept
= llcp_sock_accept
,
889 .getname
= llcp_sock_getname
,
890 .poll
= llcp_sock_poll
,
891 .ioctl
= sock_no_ioctl
,
892 .listen
= llcp_sock_listen
,
893 .shutdown
= sock_no_shutdown
,
894 .setsockopt
= nfc_llcp_setsockopt
,
895 .getsockopt
= nfc_llcp_getsockopt
,
896 .sendmsg
= llcp_sock_sendmsg
,
897 .recvmsg
= llcp_sock_recvmsg
,
898 .mmap
= sock_no_mmap
,
901 static const struct proto_ops llcp_rawsock_ops
= {
903 .owner
= THIS_MODULE
,
904 .bind
= llcp_raw_sock_bind
,
905 .connect
= sock_no_connect
,
906 .release
= llcp_sock_release
,
907 .socketpair
= sock_no_socketpair
,
908 .accept
= sock_no_accept
,
909 .getname
= llcp_sock_getname
,
910 .poll
= llcp_sock_poll
,
911 .ioctl
= sock_no_ioctl
,
912 .listen
= sock_no_listen
,
913 .shutdown
= sock_no_shutdown
,
914 .setsockopt
= sock_no_setsockopt
,
915 .getsockopt
= sock_no_getsockopt
,
916 .sendmsg
= sock_no_sendmsg
,
917 .recvmsg
= llcp_sock_recvmsg
,
918 .mmap
= sock_no_mmap
,
921 static void llcp_sock_destruct(struct sock
*sk
)
923 struct nfc_llcp_sock
*llcp_sock
= nfc_llcp_sock(sk
);
925 pr_debug("%p\n", sk
);
927 if (sk
->sk_state
== LLCP_CONNECTED
)
928 nfc_put_device(llcp_sock
->dev
);
930 skb_queue_purge(&sk
->sk_receive_queue
);
932 nfc_llcp_sock_free(llcp_sock
);
934 if (!sock_flag(sk
, SOCK_DEAD
)) {
935 pr_err("Freeing alive NFC LLCP socket %p\n", sk
);
940 struct sock
*nfc_llcp_sock_alloc(struct socket
*sock
, int type
, gfp_t gfp
)
943 struct nfc_llcp_sock
*llcp_sock
;
945 sk
= sk_alloc(&init_net
, PF_NFC
, gfp
, &llcp_sock_proto
);
949 llcp_sock
= nfc_llcp_sock(sk
);
951 sock_init_data(sock
, sk
);
952 sk
->sk_state
= LLCP_CLOSED
;
953 sk
->sk_protocol
= NFC_SOCKPROTO_LLCP
;
955 sk
->sk_destruct
= llcp_sock_destruct
;
958 llcp_sock
->dsap
= LLCP_SAP_SDP
;
959 llcp_sock
->rw
= LLCP_MAX_RW
+ 1;
960 llcp_sock
->miux
= cpu_to_be16(LLCP_MAX_MIUX
+ 1);
961 llcp_sock
->send_n
= llcp_sock
->send_ack_n
= 0;
962 llcp_sock
->recv_n
= llcp_sock
->recv_ack_n
= 0;
963 llcp_sock
->remote_ready
= 1;
964 llcp_sock
->reserved_ssap
= LLCP_SAP_MAX
;
965 nfc_llcp_socket_remote_param_init(llcp_sock
);
966 skb_queue_head_init(&llcp_sock
->tx_queue
);
967 skb_queue_head_init(&llcp_sock
->tx_pending_queue
);
968 INIT_LIST_HEAD(&llcp_sock
->accept_queue
);
971 sock
->state
= SS_UNCONNECTED
;
976 void nfc_llcp_sock_free(struct nfc_llcp_sock
*sock
)
978 kfree(sock
->service_name
);
980 skb_queue_purge(&sock
->tx_queue
);
981 skb_queue_purge(&sock
->tx_pending_queue
);
983 list_del_init(&sock
->accept_queue
);
987 nfc_llcp_local_put(sock
->local
);
990 static int llcp_sock_create(struct net
*net
, struct socket
*sock
,
991 const struct nfc_protocol
*nfc_proto
)
995 pr_debug("%p\n", sock
);
997 if (sock
->type
!= SOCK_STREAM
&&
998 sock
->type
!= SOCK_DGRAM
&&
999 sock
->type
!= SOCK_RAW
)
1000 return -ESOCKTNOSUPPORT
;
1002 if (sock
->type
== SOCK_RAW
)
1003 sock
->ops
= &llcp_rawsock_ops
;
1005 sock
->ops
= &llcp_sock_ops
;
1007 sk
= nfc_llcp_sock_alloc(sock
, sock
->type
, GFP_ATOMIC
);
1014 static const struct nfc_protocol llcp_nfc_proto
= {
1015 .id
= NFC_SOCKPROTO_LLCP
,
1016 .proto
= &llcp_sock_proto
,
1017 .owner
= THIS_MODULE
,
1018 .create
= llcp_sock_create
1021 int __init
nfc_llcp_sock_init(void)
1023 return nfc_proto_register(&llcp_nfc_proto
);
1026 void nfc_llcp_sock_exit(void)
1028 nfc_proto_unregister(&llcp_nfc_proto
);