/****************************************************************************
 * libc/net/lib_recvmsg.c
 *
 *   Copyright (C) 2007, 2008, 2012, 2008 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>

#if defined(CONFIG_NET) && !defined(CONFIG_NET_CMSG)

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

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

/****************************************************************************
 * Function: recvmsg
 *
 * Description:
 *   The recvmsg() call is identical to recvfrom() with a NULL from
 *   parameter.
 *
 * Parameters:
 *   sockfd   Socket descriptor of socket
 *   buf      Buffer to receive data
 *   len      Length of buffer
 *   flags    Receive flags
 *
 * Returned Value:
 *  (see recvfrom)
 *
 * Assumptions:
 *
 ****************************************************************************/

ssize_t recvmsg(int sockfd, FAR struct msghdr *msg, int flags)
{
  FAR void *buf             = msg->msg_iov->iov_base;
  FAR struct sockaddr *from = msg->msg_name;
  FAR socklen_t *fromlen    = (FAR socklen_t *)&msg->msg_namelen;
  size_t len                = msg->msg_iov->iov_len;

  if (msg->msg_iovlen == 1)
    {
      return recvfrom(sockfd, buf, len, flags, from, fromlen);
    }
  else
    {
      set_errno(ENOTSUP);
      return ERROR;
    }
}

#endif /* CONFIG_NET && !CONFIG_NET_CMSG */