2020-06-15 10:23:25 +02:00
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/****************************************************************************
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* net/socket/sendmsg.c
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*
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2021-02-19 12:45:37 +01:00
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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2020-06-15 10:23:25 +02:00
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*
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2021-02-19 12:45:37 +01:00
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* http://www.apache.org/licenses/LICENSE-2.0
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2020-06-15 10:23:25 +02:00
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*
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2021-02-19 12:45:37 +01:00
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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2020-06-15 10:23:25 +02:00
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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 <assert.h>
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#include <errno.h>
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#include <nuttx/cancelpt.h>
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#include <nuttx/net/net.h>
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#include "socket/socket.h"
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2020-12-01 07:55:16 +01:00
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#ifdef CONFIG_NET
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2020-06-15 10:23:25 +02:00
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: psock_sendmsg
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*
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* Description:
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* psock_sendfrom() sends messages to a socket, and may be used to
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* send data on a socket whether or not it is connection-oriented.
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* This is an internal OS interface. It is functionally equivalent to
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* sendfrom() except that:
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*
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* - It is not a cancellation point,
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* - It does not modify the errno variable, and
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2020-12-01 07:55:16 +01:00
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* - It accepts the internal socket structure as an input rather than an
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2020-06-15 10:23:25 +02:00
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* task-specific socket descriptor.
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*
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* Input Parameters:
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* psock A pointer to a NuttX-specific, internal socket structure
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* msg Message to send
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* flags Receive flags
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2020-06-15 10:23:25 +02:00
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*
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* Returned Value:
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* On success, returns the number of characters sent. If no data is
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* available to be received and the peer has performed an orderly shutdown,
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2020-12-01 07:55:16 +01:00
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* sendmsg() will return 0. Otherwise, on any failure, a negated errno
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* value is returned (see comments with sendmsg() for a list of appropriate
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* errno values).
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2020-06-15 10:23:25 +02:00
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*
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****************************************************************************/
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ssize_t psock_sendmsg(FAR struct socket *psock, FAR struct msghdr *msg,
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int flags)
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{
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/* Verify that non-NULL pointers were passed */
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if (msg == NULL || msg->msg_iov == NULL || msg->msg_iov->iov_base == NULL)
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2020-06-15 10:23:25 +02:00
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{
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return -EINVAL;
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}
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/* Verify that the sockfd corresponds to valid, allocated socket */
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2021-02-23 11:04:13 +01:00
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if (psock == NULL || psock->s_conn == NULL)
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2020-06-15 10:23:25 +02:00
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{
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return -EBADF;
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}
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2020-09-20 21:45:09 +02:00
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/* Let logic specific to this address family handle the sendmsg()
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2020-06-15 10:23:25 +02:00
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* operation.
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*/
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DEBUGASSERT(psock->s_sockif != NULL &&
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psock->s_sockif->si_sendmsg != NULL);
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return psock->s_sockif->si_sendmsg(psock, msg, flags);
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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 sendfrom() with a NULL from
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* parameter.
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*
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* Parameters:
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* sockfd Socket descriptor of socket
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* msg Buffer to receive the message
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2020-06-15 10:23:25 +02:00
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* flags Receive flags
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*
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* Returned Value:
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* On success, returns the number of characters received. On error,
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* -1 is returned, and errno is set appropriately:
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*
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* EAGAIN
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* The socket is marked non-blocking and the receive operation would
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* block, or a receive timeout had been set and the timeout expired
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* before data was received.
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* EBADF
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* The argument sockfd is an invalid descriptor.
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* ECONNREFUSED
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* A remote host refused to allow the network connection (typically
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* because it is not running the requested service).
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* EFAULT
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* The receive buffer pointer(s) point outside the process's address
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* space.
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* EINTR
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* The receive was interrupted by delivery of a signal before any data
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* were available.
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* EINVAL
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* Invalid argument passed.
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* ENOMEM
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* Could not allocate memory.
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* ENOTCONN
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* The socket is associated with a connection-oriented protocol and has
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* not been connected.
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* ENOTSOCK
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* The argument sockfd does not refer to a socket.
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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 socket *psock;
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2020-06-15 10:23:25 +02:00
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ssize_t ret;
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2020-12-01 07:55:16 +01:00
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/* sendmsg() is a cancellation point */
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enter_cancellation_point();
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2022-10-27 17:59:19 +02:00
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/* Get the underlying socket structure */
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psock = sockfd_socket(sockfd);
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/* Then let psock_sendmsg() do all of the work */
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2020-06-15 10:23:25 +02:00
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2022-10-27 17:59:19 +02:00
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ret = psock_sendmsg(psock, msg, flags);
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if (ret < 0)
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{
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_SO_SETERRNO(psock, -ret);
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ret = ERROR;
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}
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leave_cancellation_point();
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return ret;
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}
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2020-12-01 07:55:16 +01:00
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#endif /* CONFIG_NET */
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