* $Id: libnet_prand.c,v 1.21 2005/11/29 21:54:46 carlosc Exp $
* libnet_prand.c - pseudo-random number generation
* Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#include "../include/config.h"
#if (!(_WIN32) || (__CYGWIN__))
#include "../include/libnet.h"
#include "../include/win32/libnet.h"
libnet_seed_prand(libnet_t
*l
)
srand((unsigned)time(NULL
));
if (gettimeofday(&seed
, NULL
) == -1)
snprintf(l
->err_buf
, LIBNET_ERRBUF_SIZE
,
"%s(): cannot gettimeofday\n", __func__
);
* More entropy then just seeding with time(2).
srandom((unsigned)(seed
.tv_sec
^ seed
.tv_usec
));
libnet_get_prand(int mod
)
u_int32_t n
; /* 0 to 4,294,967,295 */
CryptAcquireContext(&hProv
,
CryptReleaseContext(hProv
, 0);
return (n
% 0x2); /* 0 - 1 */
return (n
% 0xff); /* 0 - 255 */
return (n
% 0x7fff); /* 0 - 32767 */
return (n
% 0xffff); /* 0 - 65535 */
return (n
% 0x7fffffff); /* 0 - 2147483647 */
return (n
); /* 0 - 4294967295 */
return (0); /* NOTTREACHED */