blob: 3cf5e0756f0e2358a4558d14957b13a31391d35d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
/* Copyright (C) 2007-2010 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Pablo Rincon <pablo.rincon.crespo@gmail.com>
*
* Utility function for seeding rand
*/
#include "suricata-common.h"
#include "detect.h"
#include "threads.h"
#include "util-debug.h"
/**
* \brief create a seed number to pass to rand() , rand_r(), and similars
* \retval seed for rand()
*/
unsigned int RandomTimePreseed(void)
{
/* preseed rand() */
time_t now = time ( 0 );
unsigned char *p = (unsigned char *)&now;
unsigned seed = 0;
size_t ind;
for ( ind = 0; ind < sizeof now; ind++ )
seed = seed * ( UCHAR_MAX + 2U ) + p[ind];
return seed;
}
|
