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2898b4a71a
Change-Id: I66e538c2f3a13db2f84eec9a3f364cf21902c5d1 Signed-off-by: chao.an <anchao@xiaomi.com>
114 lines
3.6 KiB
C
114 lines
3.6 KiB
C
/****************************************************************************
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* libc/net/lib_sendmsg.c
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*
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* Copyright (C) 2007, 2008, 2012, 2018 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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#if defined(CONFIG_NET) && !defined(CONFIG_NET_CMSG)
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <errno.h>
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#include "libc.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Function: sendmsg
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*
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* Description:
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* The sendmsg() call is identical to sendto() with a NULL from parameter.
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*
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* Parameters:
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* sockfd Socket descriptor of socket
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* buf Buffer to send data
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* len Length of buffer
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* flags Receive flags
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*
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* Returned Value:
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* (see sendto)
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*
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* Assumptions:
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*
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****************************************************************************/
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ssize_t sendmsg(int sockfd, FAR struct msghdr *msg, int flags)
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{
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FAR struct sockaddr *to = msg->msg_name;
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socklen_t tolen = msg->msg_namelen;
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FAR struct iovec *iov;
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FAR struct iovec *end;
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FAR void *buf;
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size_t len;
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int ret;
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if (msg->msg_iovlen == 1)
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{
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return sendto(sockfd, msg->msg_iov->iov_base,
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msg->msg_iov->iov_len, flags, to, tolen);
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}
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end = &msg->msg_iov[msg->msg_iovlen];
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for (len = 0, iov = msg->msg_iov; iov != end; iov++)
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{
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len += iov->iov_len;
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}
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buf = lib_malloc(len);
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if (buf == NULL)
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{
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return -ENOMEM;
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}
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for (len = 0, iov = msg->msg_iov; iov != end; iov++)
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{
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memcpy(buf + len, iov->iov_base, iov->iov_len);
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len += iov->iov_len;
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}
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ret = sendto(sockfd, buf, len, flags, to, tolen);
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lib_free(buf);
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return ret;
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}
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#endif /* CONFIG_NET && !CONFIG_NET_CMSG */
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