1/*
2 * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#ifndef _OPENSOLARIS_SYS_RANDOM_H_
30#define	_OPENSOLARIS_SYS_RANDOM_H_
31
32#include_next <sys/random.h>
33#if  __FreeBSD_version >= 1300108
34#include <sys/prng.h>
35#endif
36
37static inline int
38random_get_bytes(uint8_t *p, size_t s)
39{
40	arc4rand(p, (int)s, 0);
41	return (0);
42}
43
44static inline int
45random_get_pseudo_bytes(uint8_t *p, size_t s)
46{
47	arc4rand(p, (int)s, 0);
48	return (0);
49}
50
51static inline uint32_t
52random_in_range(uint32_t range)
53{
54#if defined(_KERNEL) && __FreeBSD_version >= 1300108
55	return (prng32_bounded(range));
56#else
57	uint32_t r;
58
59	ASSERT(range != 0);
60
61	if (range == 1)
62		return (0);
63
64	(void) random_get_pseudo_bytes((uint8_t *)&r, sizeof (r));
65
66	return (r % range);
67#endif
68}
69
70#endif	/* !_OPENSOLARIS_SYS_RANDOM_H_ */
71