diff options
Diffstat (limited to 'net/nfc/llcp/sock.c')
| -rw-r--r-- | net/nfc/llcp/sock.c | 877 |
1 files changed, 0 insertions, 877 deletions
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c deleted file mode 100644 index 6c94447ec414..000000000000 --- a/net/nfc/llcp/sock.c +++ /dev/null @@ -1,877 +0,0 @@ -/* - * Copyright (C) 2011 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the - * Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#define pr_fmt(fmt) "llcp: %s: " fmt, __func__ - -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/nfc.h> - -#include "../nfc.h" -#include "llcp.h" - -static int sock_wait_state(struct sock *sk, int state, unsigned long timeo) -{ - DECLARE_WAITQUEUE(wait, current); - int err = 0; - - pr_debug("sk %p", sk); - - add_wait_queue(sk_sleep(sk), &wait); - set_current_state(TASK_INTERRUPTIBLE); - - while (sk->sk_state != state) { - if (!timeo) { - err = -EINPROGRESS; - break; - } - - if (signal_pending(current)) { - err = sock_intr_errno(timeo); - break; - } - - release_sock(sk); - timeo = schedule_timeout(timeo); - lock_sock(sk); - set_current_state(TASK_INTERRUPTIBLE); - - err = sock_error(sk); - if (err) - break; - } - - __set_current_state(TASK_RUNNING); - remove_wait_queue(sk_sleep(sk), &wait); - return err; -} - -static struct proto llcp_sock_proto = { - .name = "NFC_LLCP", - .owner = THIS_MODULE, - .obj_size = sizeof(struct nfc_llcp_sock), -}; - -static int llcp_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) -{ - struct sock *sk = sock->sk; - struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); - struct nfc_llcp_local *local; - struct nfc_dev *dev; - struct sockaddr_nfc_llcp llcp_addr; - int len, ret = 0; - - if (!addr || addr->sa_family != AF_NFC) - return -EINVAL; - - pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family); - - memset(&llcp_addr, 0, sizeof(llcp_addr)); - len = min_t(unsigned int, sizeof(llcp_addr), alen); - memcpy(&llcp_addr, addr, len); - - /* This is going to be a listening socket, dsap must be 0 */ - if (llcp_addr.dsap != 0) - return -EINVAL; - - lock_sock(sk); - - if (sk->sk_state != LLCP_CLOSED) { - ret = -EBADFD; - goto error; - } - - dev = nfc_get_device(llcp_addr.dev_idx); - if (dev == NULL) { - ret = -ENODEV; - goto error; - } - - local = nfc_llcp_find_local(dev); - if (local == NULL) { - ret = -ENODEV; - goto put_dev; - } - - llcp_sock->dev = dev; - llcp_sock->local = nfc_llcp_local_get(local); - llcp_sock->nfc_protocol = llcp_addr.nfc_protocol; - llcp_sock->service_name_len = min_t(unsigned int, - llcp_addr.service_name_len, - NFC_LLCP_MAX_SERVICE_NAME); - llcp_sock->service_name = kmemdup(llcp_addr.service_name, - llcp_sock->service_name_len, - GFP_KERNEL); - - llcp_sock->ssap = nfc_llcp_get_sdp_ssap(local, llcp_sock); - if (llcp_sock->ssap == LLCP_SAP_MAX) { - ret = -EADDRINUSE; - goto put_dev; - } - - llcp_sock->reserved_ssap = llcp_sock->ssap; - - nfc_llcp_sock_link(&local->sockets, sk); - - pr_debug("Socket bound to SAP %d\n", llcp_sock->ssap); - - sk->sk_state = LLCP_BOUND; - -put_dev: - nfc_put_device(dev); - -error: - release_sock(sk); - return ret; -} - -static int llcp_raw_sock_bind(struct socket *sock, struct sockaddr *addr, - int alen) -{ - struct sock *sk = sock->sk; - struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); - struct nfc_llcp_local *local; - struct nfc_dev *dev; - struct sockaddr_nfc_llcp llcp_addr; - int len, ret = 0; - - if (!addr || addr->sa_family != AF_NFC) - return -EINVAL; - - pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family); - - memset(&llcp_addr, 0, sizeof(llcp_addr)); - len = min_t(unsigned int, sizeof(llcp_addr), alen); - memcpy(&llcp_addr, addr, len); - - lock_sock(sk); - - if (sk->sk_state != LLCP_CLOSED) { - ret = -EBADFD; - goto error; - } - - dev = nfc_get_device(llcp_addr.dev_idx); - if (dev == NULL) { - ret = -ENODEV; - goto error; - } - - local = nfc_llcp_find_local(dev); - if (local == NULL) { - ret = -ENODEV; - goto put_dev; - } - - llcp_sock->dev = dev; - llcp_sock->local = nfc_llcp_local_get(local); - llcp_sock->nfc_protocol = llcp_addr.nfc_protocol; - - nfc_llcp_sock_link(&local->raw_sockets, sk); - - sk->sk_state = LLCP_BOUND; - -put_dev: - nfc_put_device(dev); - -error: - release_sock(sk); - return ret; -} - -static int llcp_sock_listen(struct socket *sock, int backlog) -{ - struct sock *sk = sock->sk; - int ret = 0; - - pr_debug("sk %p backlog %d\n", sk, backlog); - - lock_sock(sk); - - if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) || - sk->sk_state != LLCP_BOUND) { - ret = -EBADFD; - goto error; - } - - sk->sk_max_ack_backlog = backlog; - sk->sk_ack_backlog = 0; - - pr_debug("Socket listening\n"); - sk->sk_state = LLCP_LISTEN; - -error: - release_sock(sk); - - return ret; -} - -void nfc_llcp_accept_unlink(struct sock *sk) -{ - struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); - - pr_debug("state %d\n", sk->sk_state); - - list_del_init(&llcp_sock->accept_queue); - sk_acceptq_removed(llcp_sock->parent); - llcp_sock->parent = NULL; - - sock_put(sk); -} - -void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk) -{ - struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); - struct nfc_llcp_sock *llcp_sock_parent = nfc_llcp_sock(parent); - - /* Lock will be free from unlink */ - sock_hold(sk); - - list_add_tail(&llcp_sock->accept_queue, - &llcp_sock_parent->accept_queue); - llcp_sock->parent = parent; - sk_acceptq_added(parent); -} - -struct sock *nfc_llcp_accept_dequeue(struct sock *parent, - struct socket *newsock) -{ - struct nfc_llcp_sock *lsk, *n, *llcp_parent; - struct sock *sk; - - llcp_parent = nfc_llcp_sock(parent); - - list_for_each_entry_safe(lsk, n, &llcp_parent->accept_queue, - accept_queue) { - sk = &lsk->sk; - lock_sock(sk); - - if (sk->sk_state == LLCP_CLOSED) { - release_sock(sk); - nfc_llcp_accept_unlink(sk); - continue; - } - - if (sk->sk_state == LLCP_CONNECTED || !newsock) { - list_del_init(&lsk->accept_queue); - sock_put(sk); - - if (newsock) - sock_graft(sk, newsock); - - release_sock(sk); - - pr_debug("Returning sk state %d\n", sk->sk_state); - - sk_acceptq_removed(parent); - - return sk; - } - - release_sock(sk); - } - - return NULL; -} - -static int llcp_sock_accept(struct socket *sock, struct socket *newsock, - int flags) -{ - DECLARE_WAITQUEUE(wait, current); - struct sock *sk = sock->sk, *new_sk; - long timeo; - int ret = 0; - - pr_debug("parent %p\n", sk); - - lock_sock_nested(sk, SINGLE_DEPTH_NESTING); - - if (sk->sk_state != LLCP_LISTEN) { - ret = -EBADFD; - goto error; - } - - timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); - - /* Wait for an incoming connection. */ - add_wait_queue_exclusive(sk_sleep(sk), &wait); - while (!(new_sk = nfc_llcp_accept_dequeue(sk, newsock))) { - set_current_state(TASK_INTERRUPTIBLE); - - if (!timeo) { - ret = -EAGAIN; - break; - } - - if (signal_pending(current)) { - ret = sock_intr_errno(timeo); - break; - } - - release_sock(sk); - timeo = schedule_timeout(timeo); - lock_sock_nested(sk, SINGLE_DEPTH_NESTING); - } - __set_current_state(TASK_RUNNING); - remove_wait_queue(sk_sleep(sk), &wait); - - if (ret) - goto error; - - newsock->state = SS_CONNECTED; - - pr_debug("new socket %p\n", new_sk); - -error: - release_sock(sk); - - return ret; -} - -static int llcp_sock_getname(struct socket *sock, struct sockaddr *uaddr, - int *len, int peer) -{ - struct sock *sk = sock->sk; - struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); - DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, llcp_addr, uaddr); - - if (llcp_sock == NULL || llcp_sock->dev == NULL) - return -EBADFD; - - pr_debug("%p %d %d %d\n", sk, llcp_sock->target_idx, - llcp_sock->dsap, llcp_sock->ssap); - - uaddr->sa_family = AF_NFC; - - *len = sizeof(struct sockaddr_nfc_llcp); - - llcp_addr->dev_idx = llcp_sock->dev->idx; - llcp_addr->target_idx = llcp_sock->target_idx; - llcp_addr->dsap = llcp_sock->dsap; - llcp_addr->ssap = llcp_sock->ssap; - llcp_addr->service_name_len = llcp_sock->service_name_len; - memcpy(llcp_addr->service_name, llcp_sock->service_name, - llcp_addr->service_name_len); - - return 0; -} - -static inline unsigned int llcp_accept_poll(struct sock *parent) -{ - struct nfc_llcp_sock *llcp_sock, *n, *parent_sock; - struct sock *sk; - - parent_sock = nfc_llcp_sock(parent); - - list_for_each_entry_safe(llcp_sock, n, &parent_sock->accept_queue, - accept_queue) { - sk = &llcp_sock->sk; - - if (sk->sk_state == LLCP_CONNECTED) - return POLLIN | POLLRDNORM; - } - - return 0; -} - -static unsigned int llcp_sock_poll(struct file *file, struct socket *sock, - poll_table *wait) -{ - struct sock *sk = sock->sk; - unsigned int mask = 0; - - pr_debug("%p\n", sk); - - sock_poll_wait(file, sk_sleep(sk), wait); - - if (sk->sk_state == LLCP_LISTEN) - return llcp_accept_poll(sk); - - if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) - mask |= POLLERR; - - if (!skb_queue_empty(&sk->sk_receive_queue)) - mask |= POLLIN | POLLRDNORM; - - if (sk->sk_state == LLCP_CLOSED) - mask |= POLLHUP; - - if (sk->sk_shutdown & RCV_SHUTDOWN) - mask |= POLLRDHUP | POLLIN | POLLRDNORM; - - if (sk->sk_shutdown == SHUTDOWN_MASK) - mask |= POLLHUP; - - if (sock_writeable(sk)) - mask |= POLLOUT | POLLWRNORM | POLLWRBAND; - else - set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); - - pr_debug("mask 0x%x\n", mask); - - return mask; -} - -static int llcp_sock_release(struct socket *sock) -{ - struct sock *sk = sock->sk; - struct nfc_llcp_local *local; - struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); - int err = 0; - - if (!sk) - return 0; - - pr_debug("%p\n", sk); - - local = llcp_sock->local; - if (local == NULL) { - err = -ENODEV; - goto out; - } - - lock_sock(sk); - - /* Send a DISC */ - if (sk->sk_state == LLCP_CONNECTED) - nfc_llcp_disconnect(llcp_sock); - - if (sk->sk_state == LLCP_LISTEN) { - struct nfc_llcp_sock *lsk, *n; - struct sock *accept_sk; - - list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue, - accept_queue) { - accept_sk = &lsk->sk; - lock_sock(accept_sk); - - nfc_llcp_disconnect(lsk); - nfc_llcp_accept_unlink(accept_sk); - - release_sock(accept_sk); - } - } - - if (llcp_sock->reserved_ssap < LLCP_SAP_MAX) - nfc_llcp_put_ssap(llcp_sock->local, llcp_sock->ssap); - - release_sock(sk); - - if (sock->type == SOCK_RAW) - nfc_llcp_sock_unlink(&local->raw_sockets, sk); - else - nfc_llcp_sock_unlink(&local->sockets, sk); - -out: - sock_orphan(sk); - sock_put(sk); - - return err; -} - -static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr, - int len, int flags) -{ - struct sock *sk = sock->sk; - struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); - struct sockaddr_nfc_llcp *addr = (struct sockaddr_nfc_llcp *)_addr; - struct nfc_dev *dev; - struct nfc_llcp_local *local; - int ret = 0; - - pr_debug("sock %p sk %p flags 0x%x\n", sock, sk, flags); - - if (!addr || len < sizeof(struct sockaddr_nfc) || - addr->sa_family != AF_NFC) - return -EINVAL; - - if (addr->service_name_len == 0 && addr->dsap == 0) - return -EINVAL; - - pr_debug("addr dev_idx=%u target_idx=%u protocol=%u\n", addr->dev_idx, - addr->target_idx, addr->nfc_protocol); - - lock_sock(sk); - - if (sk->sk_state == LLCP_CONNECTED) { - ret = -EISCONN; - goto error; - } - - dev = nfc_get_device(addr->dev_idx); - if (dev == NULL) { - ret = -ENODEV; - goto error; - } - - local = nfc_llcp_find_local(dev); - if (local == NULL) { - ret = -ENODEV; - goto put_dev; - } - - device_lock(&dev->dev); - if (dev->dep_link_up == false) { - ret = -ENOLINK; - device_unlock(&dev->dev); - goto put_dev; - } - device_unlock(&dev->dev); - - if (local->rf_mode == NFC_RF_INITIATOR && - addr->target_idx != local->target_idx) { - ret = -ENOLINK; - goto put_dev; - } - - llcp_sock->dev = dev; - llcp_sock->local = nfc_llcp_local_get(local); - llcp_sock->miu = llcp_sock->local->remote_miu; - llcp_sock->ssap = nfc_llcp_get_local_ssap(local); - if (llcp_sock->ssap == LLCP_SAP_MAX) { - ret = -ENOMEM; - goto put_dev; - } - - llcp_sock->reserved_ssap = llcp_sock->ssap; - - if (addr->service_name_len == 0) - llcp_sock->dsap = addr->dsap; - else - llcp_sock->dsap = LLCP_SAP_SDP; - llcp_sock->nfc_protocol = addr->nfc_protocol; - llcp_sock->service_name_len = min_t(unsigned int, - addr->service_name_len, - NFC_LLCP_MAX_SERVICE_NAME); - llcp_sock->service_name = kmemdup(addr->service_name, - llcp_sock->service_name_len, - GFP_KERNEL); - - nfc_llcp_sock_link(&local->connecting_sockets, sk); - - ret = nfc_llcp_send_connect(llcp_sock); - if (ret) - goto sock_unlink; - - ret = sock_wait_state(sk, LLCP_CONNECTED, - sock_sndtimeo(sk, flags & O_NONBLOCK)); - if (ret) - goto sock_unlink; - - release_sock(sk); - - return 0; - -sock_unlink: - nfc_llcp_put_ssap(local, llcp_sock->ssap); - - nfc_llcp_sock_unlink(&local->connecting_sockets, sk); - -put_dev: - nfc_put_device(dev); - -error: - release_sock(sk); - return ret; -} - -static int llcp_sock_sendmsg(struct kiocb *iocb, struct socket *sock, - struct msghdr *msg, size_t len) -{ - struct sock *sk = sock->sk; - struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); - int ret; - - pr_debug("sock %p sk %p", sock, sk); - - ret = sock_error(sk); - if (ret) - return ret; - - if (msg->msg_flags & MSG_OOB) - return -EOPNOTSUPP; - - lock_sock(sk); - - if (sk->sk_type == SOCK_DGRAM) { - struct sockaddr_nfc_llcp *addr = - (struct sockaddr_nfc_llcp *)msg->msg_name; - - if (msg->msg_namelen < sizeof(*addr)) { - release_sock(sk); - return -EINVAL; - } - - release_sock(sk); - - return nfc_llcp_send_ui_frame(llcp_sock, addr->dsap, addr->ssap, - msg, len); - } - - if (sk->sk_state != LLCP_CONNECTED) { - release_sock(sk); - return -ENOTCONN; - } - - release_sock(sk); - - return nfc_llcp_send_i_frame(llcp_sock, msg, len); -} - -static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock, - struct msghdr *msg, size_t len, int flags) -{ - int noblock = flags & MSG_DONTWAIT; - struct sock *sk = sock->sk; - unsigned int copied, rlen; - struct sk_buff *skb, *cskb; - int err = 0; - - pr_debug("%p %zu\n", sk, len); - - msg->msg_namelen = 0; - - lock_sock(sk); - - if (sk->sk_state == LLCP_CLOSED && - skb_queue_empty(&sk->sk_receive_queue)) { - release_sock(sk); - return 0; - } - - release_sock(sk); - - if (flags & (MSG_OOB)) - return -EOPNOTSUPP; - - skb = skb_recv_datagram(sk, flags, noblock, &err); - if (!skb) { - pr_err("Recv datagram failed state %d %d %d", - sk->sk_state, err, sock_error(sk)); - - if (sk->sk_shutdown & RCV_SHUTDOWN) - return 0; - - return err; - } - - rlen = skb->len; /* real length of skb */ - copied = min_t(unsigned int, rlen, len); - - cskb = skb; - if (skb_copy_datagram_iovec(cskb, 0, msg->msg_iov, copied)) { - if (!(flags & MSG_PEEK)) - skb_queue_head(&sk->sk_receive_queue, skb); - return -EFAULT; - } - - sock_recv_timestamp(msg, sk, skb); - - if (sk->sk_type == SOCK_DGRAM && msg->msg_name) { - struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb); - struct sockaddr_nfc_llcp *sockaddr = - (struct sockaddr_nfc_llcp *) msg->msg_name; - - msg->msg_namelen = sizeof(struct sockaddr_nfc_llcp); - - pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap); - - memset(sockaddr, 0, sizeof(*sockaddr)); - sockaddr->sa_family = AF_NFC; - sockaddr->nfc_protocol = NFC_PROTO_NFC_DEP; - sockaddr->dsap = ui_cb->dsap; - sockaddr->ssap = ui_cb->ssap; - } - - /* Mark read part of skb as used */ - if (!(flags & MSG_PEEK)) { - - /* SOCK_STREAM: re-queue skb if it contains unreceived data */ - if (sk->sk_type == SOCK_STREAM || - sk->sk_type == SOCK_DGRAM || - sk->sk_type == SOCK_RAW) { - skb_pull(skb, copied); - if (skb->len) { - skb_queue_head(&sk->sk_receive_queue, skb); - goto done; - } - } - - kfree_skb(skb); - } - - /* XXX Queue backlogged skbs */ - -done: - /* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */ - if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC)) - copied = rlen; - - return copied; -} - -static const struct proto_ops llcp_sock_ops = { - .family = PF_NFC, - .owner = THIS_MODULE, - .bind = llcp_sock_bind, - .connect = llcp_sock_connect, - .release = llcp_sock_release, - .socketpair = sock_no_socketpair, - .accept = llcp_sock_accept, - .getname = llcp_sock_getname, - .poll = llcp_sock_poll, - .ioctl = sock_no_ioctl, - .listen = llcp_sock_listen, - .shutdown = sock_no_shutdown, - .setsockopt = sock_no_setsockopt, - .getsockopt = sock_no_getsockopt, - .sendmsg = llcp_sock_sendmsg, - .recvmsg = llcp_sock_recvmsg, - .mmap = sock_no_mmap, -}; - -static const struct proto_ops llcp_rawsock_ops = { - .family = PF_NFC, - .owner = THIS_MODULE, - .bind = llcp_raw_sock_bind, - .connect = sock_no_connect, - .release = llcp_sock_release, - .socketpair = sock_no_socketpair, - .accept = sock_no_accept, - .getname = llcp_sock_getname, - .poll = llcp_sock_poll, - .ioctl = sock_no_ioctl, - .listen = sock_no_listen, - .shutdown = sock_no_shutdown, - .setsockopt = sock_no_setsockopt, - .getsockopt = sock_no_getsockopt, - .sendmsg = sock_no_sendmsg, - .recvmsg = llcp_sock_recvmsg, - .mmap = sock_no_mmap, -}; - -static void llcp_sock_destruct(struct sock *sk) -{ - struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); - - pr_debug("%p\n", sk); - - if (sk->sk_state == LLCP_CONNECTED) - nfc_put_device(llcp_sock->dev); - - skb_queue_purge(&sk->sk_receive_queue); - - nfc_llcp_sock_free(llcp_sock); - - if (!sock_flag(sk, SOCK_DEAD)) { - pr_err("Freeing alive NFC LLCP socket %p\n", sk); - return; - } -} - -struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp) -{ - struct sock *sk; - struct nfc_llcp_sock *llcp_sock; - - sk = sk_alloc(&init_net, PF_NFC, gfp, &llcp_sock_proto); - if (!sk) - return NULL; - - llcp_sock = nfc_llcp_sock(sk); - - sock_init_data(sock, sk); - sk->sk_state = LLCP_CLOSED; - sk->sk_protocol = NFC_SOCKPROTO_LLCP; - sk->sk_type = type; - sk->sk_destruct = llcp_sock_destruct; - - llcp_sock->ssap = 0; - llcp_sock->dsap = LLCP_SAP_SDP; - llcp_sock->rw = LLCP_DEFAULT_RW; - llcp_sock->miu = LLCP_DEFAULT_MIU; - llcp_sock->send_n = llcp_sock->send_ack_n = 0; - llcp_sock->recv_n = llcp_sock->recv_ack_n = 0; - llcp_sock->remote_ready = 1; - llcp_sock->reserved_ssap = LLCP_SAP_MAX; - skb_queue_head_init(&llcp_sock->tx_queue); - skb_queue_head_init(&llcp_sock->tx_pending_queue); - INIT_LIST_HEAD(&llcp_sock->accept_queue); - - if (sock != NULL) - sock->state = SS_UNCONNECTED; - - return sk; -} - -void nfc_llcp_sock_free(struct nfc_llcp_sock *sock) -{ - kfree(sock->service_name); - - skb_queue_purge(&sock->tx_queue); - skb_queue_purge(&sock->tx_pending_queue); - - list_del_init(&sock->accept_queue); - - sock->parent = NULL; - - nfc_llcp_local_put(sock->local); -} - -static int llcp_sock_create(struct net *net, struct socket *sock, - const struct nfc_protocol *nfc_proto) -{ - struct sock *sk; - - pr_debug("%p\n", sock); - - if (sock->type != SOCK_STREAM && - sock->type != SOCK_DGRAM && - sock->type != SOCK_RAW) - return -ESOCKTNOSUPPORT; - - if (sock->type == SOCK_RAW) - sock->ops = &llcp_rawsock_ops; - else - sock->ops = &llcp_sock_ops; - - sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC); - if (sk == NULL) - return -ENOMEM; - - return 0; -} - -static const struct nfc_protocol llcp_nfc_proto = { - .id = NFC_SOCKPROTO_LLCP, - .proto = &llcp_sock_proto, - .owner = THIS_MODULE, - .create = llcp_sock_create -}; - -int __init nfc_llcp_sock_init(void) -{ - return nfc_proto_register(&llcp_nfc_proto); -} - -void nfc_llcp_sock_exit(void) -{ - nfc_proto_unregister(&llcp_nfc_proto); -} |