/*
* Copyright (c) 2000-2024 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
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*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#ifndef _NET_SYSCTL_H_
#define _NET_SYSCTL_H_
#include <sys/cdefs.h>
#include <sys/sysctl.h>
/*
* Helper utilities for the sysctl procedures used
* by bsd networking.
*/
/*
* DECLARE_SYSCTL_HANDLER_ARG_ARRAY
*
* Helper macro to be invoked from a sysctl handler function.
*
* The macro compares the `arg2' sysctl handler argument
* with the `expected_array_size' macro parameter.
*
* If `arg2' is equal to `expected_array_size', the macro will
* define two local variables, the names of which are controlled
* by macro parameters:
*
* element_type *`array_var';
* unsigned int `len_var';
*
* The `array_var' local variable will be sized in accordance
* to the parameters. It does not use `__sized_by` annotation,
* to allow the body of the handler function to change the values,
* if needed.
*
* If `arg2' is not equal to `expected_array_size', the macro
* will return from the sysctl handler function with the
* EINVAL code.
*/
#define DECLARE_SYSCTL_HANDLER_ARG_ARRAY(element_type, \
expected_array_size, \
array_var, \
len_var) \
unsigned int len_var = (unsigned int)arg2; \
if (len_var != (expected_array_size)) { \
return EINVAL; \
} \
element_type * array_var = __unsafe_forge_bidi_indexable( \
element_type *, arg1, len_var * sizeof(element_type))
#endif /* _NET_SYSCTL_H_ */