00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/* $NetBSD: random.h,v 1.4 2014/12/10 04:38:00 christos Exp $ */
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/*
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* Copyright (C) 2004-2007, 2009 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 1999-2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* Id: random.h,v 1.20 2009/01/17 23:47:43 tbox Exp */
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#ifndef ISC_RANDOM_H
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#define ISC_RANDOM_H 1
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#include <isc/lang.h>
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#include <isc/types.h>
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/*! \file isc/random.h
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* \brief Implements a random state pool which will let the caller return a
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* series of possibly non-reproducible random values.
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*
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* Note that the
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* strength of these numbers is not all that high, and should not be
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* used in cryptography functions. It is useful for jittering values
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* a bit here and there, such as timeouts, etc.
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*/
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ISC_LANG_BEGINDECLS
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void
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isc_random_seed(isc_uint32_t seed);
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/*%<
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* Set the initial seed of the random state.
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*/
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void
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isc_random_get(isc_uint32_t *val);
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/*%<
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* Get a random value.
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*
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* Requires:
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* val != NULL.
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*/
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isc_uint32_t
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isc_random_jitter(isc_uint32_t max, isc_uint32_t jitter);
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/*%<
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* Get a random value between (max - jitter) and (max).
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* This is useful for jittering timer values.
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*/
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ISC_LANG_ENDDECLS
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#endif /* ISC_RANDOM_H */
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