226 lines
7.4 KiB
C
226 lines
7.4 KiB
C
/****************************************************************************
|
|
* net/socket/sendto.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <stdint.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/cancelpt.h>
|
|
#include <nuttx/net/net.h>
|
|
|
|
#include "socket/socket.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: psock_sendto
|
|
*
|
|
* Description:
|
|
* If sendto() is used on a connection-mode (SOCK_STREAM, SOCK_SEQPACKET)
|
|
* socket, the parameters to and 'tolen' are ignored (and the error EISCONN
|
|
* may be returned when they are not NULL and 0), and the error ENOTCONN is
|
|
* returned when the socket was not actually connected.
|
|
*
|
|
* Input Parameters:
|
|
* psock A pointer to a NuttX-specific, internal socket structure
|
|
* buf Data to send
|
|
* len Length of data to send
|
|
* flags Send flags
|
|
* to Address of recipient
|
|
* tolen The length of the address structure
|
|
*
|
|
* Returned Value:
|
|
* On success, returns the number of characters sent. On a negated errno
|
|
* value is returned. One of:
|
|
*
|
|
* EAGAIN or EWOULDBLOCK
|
|
* The socket is marked non-blocking and the requested operation
|
|
* would block.
|
|
* EBADF
|
|
* An invalid descriptor was specified.
|
|
* ECONNRESET
|
|
* Connection reset by peer.
|
|
* EDESTADDRREQ
|
|
* The socket is not connection-mode, and no peer address is set.
|
|
* EFAULT
|
|
* An invalid user space address was specified for a parameter.
|
|
* EINTR
|
|
* A signal occurred before any data was transmitted.
|
|
* EINVAL
|
|
* Invalid argument passed.
|
|
* EISCONN
|
|
* The connection-mode socket was connected already but a recipient
|
|
* was specified. (Now either this error is returned, or the recipient
|
|
* specification is ignored.)
|
|
* EMSGSIZE
|
|
* The socket type requires that message be sent atomically, and the
|
|
* size of the message to be sent made this impossible.
|
|
* ENOBUFS
|
|
* The output queue for a network interface was full. This generally
|
|
* indicates that the interface has stopped sending, but may be
|
|
* caused by transient congestion.
|
|
* ENOMEM
|
|
* No memory available.
|
|
* ENOTCONN
|
|
* The socket is not connected, and no target has been given.
|
|
* ENOTSOCK
|
|
* The argument s is not a socket.
|
|
* EOPNOTSUPP
|
|
* Some bit in the flags argument is inappropriate for the socket
|
|
* type.
|
|
* EPIPE
|
|
* The local end has been shut down on a connection oriented socket.
|
|
* In this case the process will also receive a SIGPIPE unless
|
|
* MSG_NOSIGNAL is set.
|
|
*
|
|
****************************************************************************/
|
|
|
|
ssize_t psock_sendto(FAR struct socket *psock, FAR const void *buf,
|
|
size_t len, int flags, FAR const struct sockaddr *to,
|
|
socklen_t tolen)
|
|
{
|
|
struct iovec iov;
|
|
struct msghdr msg;
|
|
|
|
if (tolen != 0 && to == NULL)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
iov.iov_base = (FAR void *)buf;
|
|
iov.iov_len = len;
|
|
msg.msg_name = (FAR struct sockaddr *)to;
|
|
msg.msg_namelen = tolen;
|
|
msg.msg_iov = &iov;
|
|
msg.msg_iovlen = 1;
|
|
msg.msg_control = NULL;
|
|
msg.msg_controllen = 0;
|
|
msg.msg_flags = 0;
|
|
|
|
/* And let psock_sendmsg do all of the work */
|
|
|
|
return psock_sendmsg(psock, &msg, flags);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: sendto
|
|
*
|
|
* Description:
|
|
* If sendto() is used on a connection-mode (SOCK_STREAM, SOCK_SEQPACKET)
|
|
* socket, the parameters to and 'tolen' are ignored (and the error EISCONN
|
|
* may be returned when they are not NULL and 0), and the error ENOTCONN is
|
|
* returned when the socket was not actually connected.
|
|
*
|
|
* Input Parameters:
|
|
* sockfd Socket descriptor of socket
|
|
* buf Data to send
|
|
* len Length of data to send
|
|
* flags Send flags
|
|
* to Address of recipient
|
|
* tolen The length of the address structure
|
|
*
|
|
* Returned Value:
|
|
* On success, returns the number of characters sent. On error,
|
|
* -1 is returned, and errno is set appropriately:
|
|
*
|
|
* EAGAIN or EWOULDBLOCK
|
|
* The socket is marked non-blocking and the requested operation
|
|
* would block.
|
|
* EBADF
|
|
* An invalid descriptor was specified.
|
|
* ECONNRESET
|
|
* Connection reset by peer.
|
|
* EDESTADDRREQ
|
|
* The socket is not connection-mode, and no peer address is set.
|
|
* EFAULT
|
|
* An invalid user space address was specified for a parameter.
|
|
* EINTR
|
|
* A signal occurred before any data was transmitted.
|
|
* EINVAL
|
|
* Invalid argument passed.
|
|
* EISCONN
|
|
* The connection-mode socket was connected already but a recipient
|
|
* was specified. (Now either this error is returned, or the recipient
|
|
* specification is ignored.)
|
|
* EMSGSIZE
|
|
* The socket type requires that message be sent atomically, and the
|
|
* size of the message to be sent made this impossible.
|
|
* ENOBUFS
|
|
* The output queue for a network interface was full. This generally
|
|
* indicates that the interface has stopped sending, but may be
|
|
* caused by transient congestion.
|
|
* ENOMEM
|
|
* No memory available.
|
|
* ENOTCONN
|
|
* The socket is not connected, and no target has been given.
|
|
* ENOTSOCK
|
|
* The argument s is not a socket.
|
|
* EOPNOTSUPP
|
|
* Some bit in the flags argument is inappropriate for the socket
|
|
* type.
|
|
* EPIPE
|
|
* The local end has been shut down on a connection oriented socket.
|
|
* In this case the process will also receive a SIGPIPE unless
|
|
* MSG_NOSIGNAL is set.
|
|
*
|
|
****************************************************************************/
|
|
|
|
ssize_t sendto(int sockfd, FAR const void *buf, size_t len, int flags,
|
|
FAR const struct sockaddr *to, socklen_t tolen)
|
|
{
|
|
FAR struct socket *psock;
|
|
ssize_t ret;
|
|
|
|
/* sendto() is a cancellation point */
|
|
|
|
enter_cancellation_point();
|
|
|
|
/* Get the underlying socket structure */
|
|
|
|
ret = sockfd_socket(sockfd, &psock);
|
|
|
|
/* And let psock_sendto do all of the work */
|
|
|
|
if (ret == OK)
|
|
{
|
|
ret = psock_sendto(psock, buf, len, flags, to, tolen);
|
|
}
|
|
|
|
if (ret < 0)
|
|
{
|
|
_SO_SETERRNO(psock, -ret);
|
|
ret = ERROR;
|
|
}
|
|
|
|
leave_cancellation_point();
|
|
return ret;
|
|
}
|