b85008dc63
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@353 42af7a65-404d-4744-a932-0658087f49c3
130 lines
5.1 KiB
C
130 lines
5.1 KiB
C
/****************************************************************************
|
|
* net/accept.c
|
|
*
|
|
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <errno.h>
|
|
|
|
#include "net-internal.h"
|
|
|
|
/****************************************************************************
|
|
* Global Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Function: accept
|
|
*
|
|
* Description:
|
|
* The accept function is used with connection-based socket types
|
|
* (SOCK_STREAM, SOCK_SEQPACKET and SOCK_RDM). It extracts the first
|
|
* connection request on the queue of pending connections, creates a new
|
|
* connected socket with mostly the same properties as 'sockfd', and
|
|
* allocates a new socket descriptor for the socket, which is returned. The
|
|
* newly created socket is no longer in the listening state. The original
|
|
* socket 'sockfd' is unaffected by this call. Per file descriptor flags
|
|
* are not inherited across an accept.
|
|
*
|
|
* The 'sockfd' argument is a socket descriptor that has been created with
|
|
* socket(), bound to a local address with bind(), and is listening for
|
|
* connections after a call to listen().
|
|
*
|
|
* On return, the 'addr' structure is filled in with the address of the
|
|
* connecting entity. The 'addrlen' argument initially contains the size
|
|
* of the structure pointed to by 'addr'; on return it will contain the
|
|
* actual length of the address returned.
|
|
*
|
|
* If no pending connections are present on the queue, and the socket is
|
|
* not marked as non-blocking, accept blocks the caller until a connection
|
|
* is present. If the socket is marked non-blocking and no pending
|
|
* connections are present on the queue, accept returns EAGAIN.
|
|
*
|
|
* Parameters:
|
|
* sockfd The listening socket descriptior
|
|
* addr Receives the address of the connecting client
|
|
* addrlen Input: allocated size of 'addr', Return: returned size of 'addr'
|
|
*
|
|
* Returned Value:
|
|
* Returns -1 on error. If it succeeds, it returns a non-negative integer
|
|
* that is a descriptor for the accepted socket.
|
|
*
|
|
* EAGAIN or EWOULDBLOCK
|
|
* The socket is marked non-blocking and no connections are present to
|
|
* be accepted.
|
|
* EBADF
|
|
* The descriptor is invalid.
|
|
* ENOTSOCK
|
|
* The descriptor references a file, not a socket.
|
|
* EOPNOTSUPP
|
|
* The referenced socket is not of type SOCK_STREAM.
|
|
* EINTR
|
|
* The system call was interrupted by a signal that was caught before
|
|
* a valid connection arrived.
|
|
* ECONNABORTED
|
|
* A connection has been aborted.
|
|
* EINVAL
|
|
* Socket is not listening for connections.
|
|
* EMFILE
|
|
* The per-process limit of open file descriptors has been reached.
|
|
* ENFILE
|
|
* The system maximum for file descriptors has been reached.
|
|
* EFAULT
|
|
* The addr parameter is not in a writable part of the user address
|
|
* space.
|
|
* ENOBUFS or ENOMEM
|
|
* Not enough free memory.
|
|
* EPROTO
|
|
* Protocol error.
|
|
* EPERM
|
|
* Firewall rules forbid connection.
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen)
|
|
{
|
|
*get_errno_ptr() = ENOSYS;
|
|
return ERROR;
|
|
}
|
|
|
|
#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */
|