+++ /dev/null
-/*
- * 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;
-}
-
-static int nfc_llcp_setsockopt(struct socket *sock, int level, int optname,
- char __user *optval, unsigned int optlen)
-{
- struct sock *sk = sock->sk;
- struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
- u32 opt;
- int err = 0;
-
- pr_debug("%p optname %d\n", sk, optname);
-
- if (level != SOL_NFC)
- return -ENOPROTOOPT;
-
- lock_sock(sk);
-
- switch (optname) {
- case NFC_LLCP_RW:
- if (sk->sk_state == LLCP_CONNECTED ||
- sk->sk_state == LLCP_BOUND ||
- sk->sk_state == LLCP_LISTEN) {
- err = -EINVAL;
- break;
- }
-
- if (get_user(opt, (u32 __user *) optval)) {
- err = -EFAULT;
- break;
- }
-
- if (opt > LLCP_MAX_RW) {
- err = -EINVAL;
- break;
- }
-
- llcp_sock->rw = (u8) opt;
-
- break;
-
- case NFC_LLCP_MIUX:
- if (sk->sk_state == LLCP_CONNECTED ||
- sk->sk_state == LLCP_BOUND ||
- sk->sk_state == LLCP_LISTEN) {
- err = -EINVAL;
- break;
- }
-
- if (get_user(opt, (u32 __user *) optval)) {
- err = -EFAULT;
- break;
- }
-
- if (opt > LLCP_MAX_MIUX) {
- err = -EINVAL;
- break;
- }
-
- llcp_sock->miux = cpu_to_be16((u16) opt);
-
- break;
-
- default:
- err = -ENOPROTOOPT;
- break;
- }
-
- release_sock(sk);
-
- pr_debug("%p rw %d miux %d\n", llcp_sock,
- llcp_sock->rw, llcp_sock->miux);
-
- return err;
-}
-
-static int nfc_llcp_getsockopt(struct socket *sock, int level, int optname,
- char __user *optval, int __user *optlen)
-{
- struct nfc_llcp_local *local;
- struct sock *sk = sock->sk;
- struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
- int len, err = 0;
- u16 miux, remote_miu;
- u8 rw;
-
- pr_debug("%p optname %d\n", sk, optname);
-
- if (level != SOL_NFC)
- return -ENOPROTOOPT;
-
- if (get_user(len, optlen))
- return -EFAULT;
-
- local = llcp_sock->local;
- if (!local)
- return -ENODEV;
-
- len = min_t(u32, len, sizeof(u32));
-
- lock_sock(sk);
-
- switch (optname) {
- case NFC_LLCP_RW:
- rw = llcp_sock->rw > LLCP_MAX_RW ? local->rw : llcp_sock->rw;
- if (put_user(rw, (u32 __user *) optval))
- err = -EFAULT;
-
- break;
-
- case NFC_LLCP_MIUX:
- miux = be16_to_cpu(llcp_sock->miux) > LLCP_MAX_MIUX ?
- be16_to_cpu(local->miux) : be16_to_cpu(llcp_sock->miux);
-
- if (put_user(miux, (u32 __user *) optval))
- err = -EFAULT;
-
- break;
-
- case NFC_LLCP_REMOTE_MIU:
- remote_miu = llcp_sock->remote_miu > LLCP_MAX_MIU ?
- local->remote_miu : llcp_sock->remote_miu;
-
- if (put_user(remote_miu, (u32 __user *) optval))
- err = -EFAULT;
-
- break;
-
- case NFC_LLCP_REMOTE_LTO:
- if (put_user(local->remote_lto / 10, (u32 __user *) optval))
- err = -EFAULT;
-
- break;
-
- case NFC_LLCP_REMOTE_RW:
- if (put_user(llcp_sock->remote_rw, (u32 __user *) optval))
- err = -EFAULT;
-
- break;
-
- default:
- err = -ENOPROTOOPT;
- break;
- }
-
- release_sock(sk);
-
- if (put_user(len, optlen))
- return -EFAULT;
-
- return err;
-}
-
-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->remote_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);
-
- 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);
-
- 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 = nfc_llcp_setsockopt,
- .getsockopt = nfc_llcp_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_MAX_RW + 1;
- llcp_sock->miux = cpu_to_be16(LLCP_MAX_MIUX + 1);
- 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;
- nfc_llcp_socket_remote_param_init(llcp_sock);
- 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);
-}
projects / karo-tx-linux.git / blobdiff