forked from Archive/PX4-Autopilot
290 lines
9.7 KiB
C
290 lines
9.7 KiB
C
/****************************************************************************
|
|
* net/getsockopt.c
|
|
*
|
|
* Copyright (C) 2007-2009, 2012 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_SOCKOPTS)
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <errno.h>
|
|
|
|
#include "net_internal.h"
|
|
|
|
/****************************************************************************
|
|
* Global Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Function: psock_getsockopt
|
|
*
|
|
* Description:
|
|
* getsockopt() retrieve thse value for the option specified by the
|
|
* 'option' argument for the socket specified by the 'psock' argument. If
|
|
* the size of the option value is greater than 'value_len', the value
|
|
* stored in the object pointed to by the 'value' argument will be silently
|
|
* truncated. Otherwise, the length pointed to by the 'value_len' argument
|
|
* will be modified to indicate the actual length of the'value'.
|
|
*
|
|
* The 'level' argument specifies the protocol level of the option. To
|
|
* retrieve 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:
|
|
* psock Socket structure of the socket to query
|
|
* level Protocol level to set the option
|
|
* option identifies the option to get
|
|
* value Points to the argument value
|
|
* value_len The length of the argument value
|
|
*
|
|
* Returned Value:
|
|
*
|
|
* EINVAL
|
|
* The specified option is invalid at the specified socket 'level' or the
|
|
* socket has been shutdown.
|
|
* ENOPROTOOPT
|
|
* The 'option' is not supported by the protocol.
|
|
* ENOTSOCK
|
|
* The 'psock' argument does not refer to a socket.
|
|
* ENOBUFS
|
|
* Insufficient resources are available in the system to complete the
|
|
* call.
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
int psock_getsockopt(FAR struct socket *psock, int level, int option,
|
|
FAR void *value, FAR socklen_t *value_len)
|
|
{
|
|
int err;
|
|
|
|
/* Verify that the socket option if valid (but might not be supported ) */
|
|
|
|
if (!_SO_GETVALID(option) || !value || !value_len)
|
|
{
|
|
err = EINVAL;
|
|
goto errout;
|
|
}
|
|
|
|
/* Process the option */
|
|
|
|
switch (option)
|
|
{
|
|
/* The following options take a point to an integer boolean value.
|
|
* We will blindly report the bit here although the implementation
|
|
* is outside of the scope of getsockopt.
|
|
*/
|
|
|
|
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 */
|
|
{
|
|
sockopt_t optionset;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* Sample the current options. This is atomic operation and so
|
|
* should not require any special steps for thread safety. We
|
|
* this outside of the macro because you can never be sure what
|
|
* a macro will do.
|
|
*/
|
|
|
|
optionset = psock->s_options;
|
|
*(int*)value = _SO_GETOPT(optionset, option);
|
|
*value_len = sizeof(int);
|
|
}
|
|
break;
|
|
|
|
case SO_TYPE: /* Reports the socket type */
|
|
{
|
|
/* 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;
|
|
}
|
|
|
|
/* Return the socket type */
|
|
|
|
*(int*)value = psock->s_type;
|
|
*value_len = sizeof(int);
|
|
}
|
|
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 'int'. Should also check
|
|
* that 'value' is properly aligned for an 'int'
|
|
*/
|
|
|
|
if (*value_len < sizeof(struct timeval))
|
|
{
|
|
err = EINVAL;
|
|
goto errout;
|
|
}
|
|
|
|
/* Get the timeout value. This is a atomic operation and should
|
|
* require no special operation.
|
|
*/
|
|
|
|
if (option == SO_RCVTIMEO)
|
|
{
|
|
timeo = psock->s_rcvtimeo;
|
|
}
|
|
else
|
|
{
|
|
timeo = psock->s_sndtimeo;
|
|
}
|
|
|
|
/* Then return the timeout value to the caller */
|
|
|
|
net_dsec2timeval(timeo, (struct timeval *)value);
|
|
*value_len = sizeof(struct timeval);
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
/* The following are not yet implemented */
|
|
|
|
case SO_ACCEPTCONN: /* Reports whether socket listening is enabled */
|
|
case SO_LINGER:
|
|
case SO_SNDBUF: /* Sets send buffer size */
|
|
case SO_RCVBUF: /* Sets receive buffer size */
|
|
case SO_ERROR: /* Reports and clears error status. */
|
|
case SO_RCVLOWAT: /* Sets the minimum number of bytes to input */
|
|
case SO_SNDLOWAT: /* Sets the minimum number of bytes to output */
|
|
|
|
default:
|
|
err = ENOPROTOOPT;
|
|
goto errout;
|
|
}
|
|
return OK;
|
|
|
|
errout:
|
|
set_errno(err);
|
|
return ERROR;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Function: getsockopt
|
|
*
|
|
* Description:
|
|
* getsockopt() retrieve thse value for the option specified by the
|
|
* 'option' argument for the socket specified by the 'sockfd' argument. If
|
|
* the size of the option value is greater than 'value_len', the value
|
|
* stored in the object pointed to by the 'value' argument will be silently
|
|
* truncated. Otherwise, the length pointed to by the 'value_len' argument
|
|
* will be modified to indicate the actual length of the'value'.
|
|
*
|
|
* The 'level' argument specifies the protocol level of the option. To
|
|
* retrieve 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 get
|
|
* value Points to the argument value
|
|
* value_len The length of the argument value
|
|
*
|
|
* Returned Value:
|
|
*
|
|
* EBADF
|
|
* The 'sockfd' argument is not a valid socket descriptor.
|
|
* EINVAL
|
|
* The specified option is invalid at the specified socket 'level' or the
|
|
* socket has been shutdown.
|
|
* ENOPROTOOPT
|
|
* The 'option' is not supported by the protocol.
|
|
* ENOTSOCK
|
|
* The 'sockfd' argument does not refer to a socket.
|
|
* ENOBUFS
|
|
* Insufficient resources are available in the system to complete the
|
|
* call.
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
int getsockopt(int sockfd, int level, int option, void *value, socklen_t *value_len)
|
|
{
|
|
FAR struct socket *psock;
|
|
|
|
/* Get the underlying socket structure */
|
|
/* Verify that the sockfd corresponds to valid, allocated socket */
|
|
|
|
psock = sockfd_socket(sockfd);
|
|
if (!psock || psock->s_crefs <= 0)
|
|
{
|
|
set_errno(EBADF);
|
|
return ERROR;
|
|
}
|
|
|
|
/* Then let psock_getsockopt() do all of the work */
|
|
|
|
return psock_getsockopt(psock, level, option, value, value_len);
|
|
}
|
|
|
|
#endif /* CONFIG_NET && CONFIG_NET_SOCKOPTS */
|