e4dd33280d
psock_close() and net_close() are internal OS functions and should not set the errno variable.
psock_ioctl() and netdev_ioctl() are internal OS functions and should not set the errno variable.
net_dupsd() and net_dupsd2() are internal OS functions and should not set the errno variable.
net/ and fs/: net_vfcntl(), file_fcntl(), file_dup(), and file_dup2() are all internal OS interfaces and should not modify the errno value.
140 lines
4.3 KiB
C
140 lines
4.3 KiB
C
/****************************************************************************
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* net/socket/net_close.c
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*
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* Copyright (C) 2007-2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <debug.h>
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#include <assert.h>
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#include <nuttx/net/net.h>
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#include "socket/socket.h"
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#ifdef CONFIG_NET
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: psock_close
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*
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* Description:
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* Performs the close operation on a socket instance
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*
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* Parameters:
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* psock Socket instance
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*
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* Returned Value:
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* Returns zero (OK) on success. On failure, it returns a negated errno
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* value to indicate the nature of the error.
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*
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* Assumptions:
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*
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****************************************************************************/
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int psock_close(FAR struct socket *psock)
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{
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int ret;
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/* Verify that the sockfd corresponds to valid, allocated socket */
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if (!psock || psock->s_crefs <= 0)
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{
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return -EBADF;
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}
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/* We perform the close operation only if this is the last count on
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* the socket. (actually, I think the socket crefs only takes the values
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* 0 and 1 right now).
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*
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* It is possible for a psock to have no connection, e.g. a TCP socket
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* waiting in accept.
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*/
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if (psock->s_crefs <= 1 && psock->s_conn != NULL)
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{
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/* Let the address family's close() method handle the operation */
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DEBUGASSERT(psock->s_sockif != NULL && psock->s_sockif->si_close != NULL);
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ret = psock->s_sockif->si_close(psock);
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/* Was the close successful */
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if (ret < 0)
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{
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return ret;
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}
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}
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/* Then release our reference on the socket structure containing the connection */
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sock_release(psock);
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return OK;
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}
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/****************************************************************************
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* Name: net_close
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*
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* Description:
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* Performs the close operation on socket descriptors
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*
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* Parameters:
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* sockfd Socket descriptor of socket
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*
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* Returned Value:
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* Returns zero (OK) on success. On failure, it returns a negated errno
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* value to indicate the nature of the error.
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*
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* Assumptions:
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*
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****************************************************************************/
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int net_close(int sockfd)
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{
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return psock_close(sockfd_socket(sockfd));
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}
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#endif /* CONFIG_NET */
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