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px4-firmware/nuttx/net/setsockopt.c

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/****************************************************************************
* net/setsockopt.c
*
* Copyright (C) 2007, 2008, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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_SOCKOPTS)
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <arch/irq.h>
#include "net_internal.h"
/****************************************************************************
* Global Functions
****************************************************************************/
/****************************************************************************
* Function: setsockopt
*
* Description:
* setsockopt() sets the option specified by the 'option' argument,
* at the protocol level specified by the 'level' argument, to the value
* pointed to by the 'value' argument for the socket associated with the
* file descriptor specified by the 'sockfd' argument.
*
* The 'level' argument specifies the protocol level of the option. To set
* options at the socket level, specify the level argument as SOL_SOCKET.
*
* See <sys/socket.h> a complete list of values for the 'option' argument.
*
* Parameters:
* sockfd Socket descriptor of socket
* level Protocol level to set the option
* option identifies the option to set
* value Points to the argument value
* value_len The length of the argument value
*
* Returned Value:
* 0 on success; -1 on failure
*
* EBADF
* The 'sockfd' argument is not a valid socket descriptor.
* EDOM
* The send and receive timeout values are too big to fit into the
* timeout fields in the socket structure.
* EINVAL
* The specified option is invalid at the specified socket 'level' or the
* socket has been shut down.
* EISCONN
* The socket is already connected, and a specified option cannot be set
* while the socket is connected.
* ENOPROTOOPT
* The 'option' is not supported by the protocol.
* ENOTSOCK
* The 'sockfd' argument does not refer to a socket.
* ENOMEM
* There was insufficient memory available for the operation to complete.
* ENOBUFS
* Insufficient resources are available in the system to complete the
* call.
*
* Assumptions:
*
****************************************************************************/
int setsockopt(int sockfd, int level, int option, const void *value, socklen_t value_len)
{
FAR struct socket *psock;
uip_lock_t flags;
int err;
/* Get the underlying socket structure */
/* Verify that the sockfd corresponds to valid, allocated socket */
psock = sockfd_socket(sockfd);
if (!psock || psock->s_crefs <= 0)
{
err = EBADF;
goto errout;
}
/* Verify that the socket option if valid (but might not be supported ) */
if (!_SO_SETVALID(option) || !value)
{
err = EINVAL;
goto errout;
}
/* Process the option */
switch (option)
{
/* The following options take a point to an integer boolean value.
* We will blindly set the bit here although the implementation
* is outside of the scope of setsockopt.
*/
case SO_DEBUG: /* Enables recording of debugging information */
case SO_BROADCAST: /* Permits sending of broadcast messages */
case SO_REUSEADDR: /* Allow reuse of local addresses */
case SO_KEEPALIVE: /* Keeps connections active by enabling the
* periodic transmission */
case SO_OOBINLINE: /* Leaves received out-of-band data inline */
case SO_DONTROUTE: /* Requests outgoing messages bypass standard routing */
{
int setting;
/* Verify that option is the size of an 'int'. Should also check
* that 'value' is properly aligned for an 'int'
*/
if (value_len != sizeof(int))
{
err = EINVAL;
goto errout;
}
/* Get the value. Is the option being set or cleared? */
setting = *(int*)value;
/* Disable interrupts so that there is no conflict with interrupt
* level access to options.
*/
flags = uip_lock();
/* Set or clear the option bit */
if (setting)
{
_SO_SETOPT(psock->s_options, option);
}
else
{
_SO_CLROPT(psock->s_options, option);
}
uip_unlock(flags);
}
break;
/* The following are valid only if the OS CLOCK feature is enabled */
case SO_RCVTIMEO:
case SO_SNDTIMEO:
#ifndef CONFIG_DISABLE_CLOCK
{
socktimeo_t timeo;
/* Verify that option is the size of an 'struct timeval'. */
if (value_len != sizeof(struct timeval))
{
err = EINVAL;
goto errout;
}
/* Get the timeout value */
timeo = net_timeval2dsec((struct timeval *)value);
/* Save the timeout value */
if (option == SO_RCVTIMEO)
{
psock->s_rcvtimeo = timeo;
}
else
{
psock->s_sndtimeo = timeo;
}
/* Set/clear the corresponding enable/disable bit */
if (timeo)
{
_SO_CLROPT(psock->s_options, option);
}
else
{
_SO_SETOPT(psock->s_options, option);
}
}
break;
#endif
/* The following are not yet implemented */
case SO_LINGER:
case SO_SNDBUF: /* Sets send buffer size */
case SO_RCVBUF: /* Sets receive buffer size */
case SO_RCVLOWAT: /* Sets the minimum number of bytes to input */
case SO_SNDLOWAT: /* Sets the minimum number of bytes to output */
/* There options are only valid when used with getopt */
case SO_ACCEPTCONN: /* Reports whether socket listening is enabled */
case SO_ERROR: /* Reports and clears error status. */
case SO_TYPE: /* Reports the socket type */
default:
err = ENOPROTOOPT;
goto errout;
}
return OK;
errout:
*get_errno_ptr() = err;
return ERROR;
}
#endif /* CONFIG_NET && CONFIG_NET_SOCKOPTS */
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