nuttx/net/socket/bind.c

/****************************************************************************
 * net/socket/bind.c
 *
 *   Copyright (C) 2007-2009, 2012, 2014-2017 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * 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>

#include <sys/types.h>
#include <sys/socket.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>

#include <nuttx/net/net.h>

#include "socket/socket.h"

#ifdef CONFIG_NET

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: psock_bind
 *
 * Description:
 *   bind() gives the socket 'psock' the local address 'addr'. 'addr' is
 *   'addrlen' bytes long. Traditionally, this is called "assigning a name
 *   to a socket." When a socket is created with socket, it exists in a name
 *   space (address family) but has no name assigned.
 *
 * Input Parameters:
 *   psock    Socket structure of the socket to bind
 *   addr     Socket local address
 *   addrlen  Length of 'addr'
 *
 * Returned Value:
 *  Returns zero (OK) on success.  On failure, it returns a negated errno
 *  value to indicate the nature of the error.
 *
 *   EACCES
 *     The address is protected, and the user is not the superuser.
 *   EADDRINUSE
 *     The given address is already in use.
 *   EINVAL
 *     The socket is already bound to an address.
 *   ENOTSOCK
 *     psock is a descriptor for a file, not a socket.
 *
 ****************************************************************************/

int psock_bind(FAR struct socket *psock, const struct sockaddr *addr,
               socklen_t addrlen)
{
  int ret = OK;

  /* Verify that the psock corresponds to valid, allocated socket */

  if (!psock || psock->s_crefs <= 0)
    {
      return -ENOTSOCK;
    }

  /* Let the address family's connect() method handle the operation */

  DEBUGASSERT(psock->s_sockif != NULL && psock->s_sockif->si_bind != NULL);
  ret = psock->s_sockif->si_bind(psock, addr, addrlen);

  /* Was the bind successful */

  if (ret < 0)
    {
      return ret;
    }

  /* Mark the socket bound */

  psock->s_flags |= _SF_BOUND;

  return OK;
}

/****************************************************************************
 * Name: bind
 *
 * Description:
 *   bind() gives the socket 'sockfd' the local address 'addr'. 'addr' is
 *   'addrlen' bytes long. Traditionally, this is called "assigning a name to
 *   a socket." When a socket is created with socket, it exists in a name
 *   space (address family) but has no name assigned.
 *
 * Input Parameters:
 *   sockfd   Socket descriptor of the socket to bind
 *   addr     Socket local address
 *   addrlen  Length of 'addr'
 *
 * Returned Value:
 *   0 on success; -1 on error with errno set appropriately
 *
 *   EACCES
 *     The address is protected, and the user is not the superuser.
 *   EADDRINUSE
 *     The given address is already in use.
 *   EBADF
 *     sockfd is not a valid descriptor.
 *   EINVAL
 *     The socket is already bound to an address.
 *   ENOTSOCK
 *     sockfd is a descriptor for a file, not a socket.
 *
 ****************************************************************************/

int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
{
  FAR struct socket *psock;
  int ret;

  /* Use the socket descriptor to get the underlying socket structure */

  psock = sockfd_socket(sockfd);

  /* Then let psock_bind do all of the work */

  ret = psock_bind(psock, addr, addrlen);
  if (ret < 0)
    {
      _SO_SETERRNO(psock, -ret);
      return ERROR;
    }

  return OK;
}

#endif /* CONFIG_NET */