1*a1e26a70SApple OSS Distributions /* 2*a1e26a70SApple OSS Distributions * Copyright (c) 2000-2024 Apple Inc. All rights reserved. 3*a1e26a70SApple OSS Distributions * 4*a1e26a70SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*a1e26a70SApple OSS Distributions * 6*a1e26a70SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*a1e26a70SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*a1e26a70SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*a1e26a70SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*a1e26a70SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*a1e26a70SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*a1e26a70SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*a1e26a70SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*a1e26a70SApple OSS Distributions * 15*a1e26a70SApple OSS Distributions * Please obtain a copy of the License at 16*a1e26a70SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*a1e26a70SApple OSS Distributions * 18*a1e26a70SApple OSS Distributions * The Original Code and all software distributed under the License are 19*a1e26a70SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*a1e26a70SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*a1e26a70SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*a1e26a70SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*a1e26a70SApple OSS Distributions * Please see the License for the specific language governing rights and 24*a1e26a70SApple OSS Distributions * limitations under the License. 25*a1e26a70SApple OSS Distributions * 26*a1e26a70SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*a1e26a70SApple OSS Distributions */ 28*a1e26a70SApple OSS Distributions 29*a1e26a70SApple OSS Distributions #ifndef _NET_SYSCTL_H_ 30*a1e26a70SApple OSS Distributions #define _NET_SYSCTL_H_ 31*a1e26a70SApple OSS Distributions 32*a1e26a70SApple OSS Distributions #include <sys/cdefs.h> 33*a1e26a70SApple OSS Distributions #include <sys/sysctl.h> 34*a1e26a70SApple OSS Distributions /* 35*a1e26a70SApple OSS Distributions * Helper utilities for the sysctl procedures used 36*a1e26a70SApple OSS Distributions * by bsd networking. 37*a1e26a70SApple OSS Distributions */ 38*a1e26a70SApple OSS Distributions 39*a1e26a70SApple OSS Distributions /* 40*a1e26a70SApple OSS Distributions * DECLARE_SYSCTL_HANDLER_ARG_ARRAY 41*a1e26a70SApple OSS Distributions * 42*a1e26a70SApple OSS Distributions * Helper macro to be invoked from a sysctl handler function. 43*a1e26a70SApple OSS Distributions * 44*a1e26a70SApple OSS Distributions * The macro compares the `arg2' sysctl handler argument 45*a1e26a70SApple OSS Distributions * with the `expected_array_size' macro parameter. 46*a1e26a70SApple OSS Distributions * 47*a1e26a70SApple OSS Distributions * If `arg2' is equal to `expected_array_size', the macro will 48*a1e26a70SApple OSS Distributions * define two local variables, the names of which are controlled 49*a1e26a70SApple OSS Distributions * by macro parameters: 50*a1e26a70SApple OSS Distributions * 51*a1e26a70SApple OSS Distributions * element_type *`array_var'; 52*a1e26a70SApple OSS Distributions * unsigned int `len_var'; 53*a1e26a70SApple OSS Distributions * 54*a1e26a70SApple OSS Distributions * The `array_var' local variable will be sized in accordance 55*a1e26a70SApple OSS Distributions * to the parameters. It does not use `__sized_by` annotation, 56*a1e26a70SApple OSS Distributions * to allow the body of the handler function to change the values, 57*a1e26a70SApple OSS Distributions * if needed. 58*a1e26a70SApple OSS Distributions * 59*a1e26a70SApple OSS Distributions * If `arg2' is not equal to `expected_array_size', the macro 60*a1e26a70SApple OSS Distributions * will return from the sysctl handler function with the 61*a1e26a70SApple OSS Distributions * EINVAL code. 62*a1e26a70SApple OSS Distributions */ 63*a1e26a70SApple OSS Distributions #define DECLARE_SYSCTL_HANDLER_ARG_ARRAY(element_type, \ 64*a1e26a70SApple OSS Distributions expected_array_size, \ 65*a1e26a70SApple OSS Distributions array_var, \ 66*a1e26a70SApple OSS Distributions len_var) \ 67*a1e26a70SApple OSS Distributions unsigned int len_var = (unsigned int)arg2; \ 68*a1e26a70SApple OSS Distributions if (len_var != (expected_array_size)) { \ 69*a1e26a70SApple OSS Distributions return EINVAL; \ 70*a1e26a70SApple OSS Distributions } \ 71*a1e26a70SApple OSS Distributions element_type * array_var = __unsafe_forge_bidi_indexable( \ 72*a1e26a70SApple OSS Distributions element_type *, arg1, len_var * sizeof(element_type)) 73*a1e26a70SApple OSS Distributions 74*a1e26a70SApple OSS Distributions 75*a1e26a70SApple OSS Distributions #endif /* _NET_SYSCTL_H_ */ 76