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/*
* ProFTPD - mod_proxy random number implementation
* Copyright (c) 2013-2020 TJ Saunders
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
*
* As a special exemption, TJ Saunders and other respective copyright holders
* give permission to link this program with OpenSSL, and distribute the
* resulting executable, without including the source code for OpenSSL in the
* source distribution.
*/
#include "mod_proxy.h"
#include "proxy/random.h"
static const char *trace_channel = "proxy.random";
/* If random(3) is supported on this platform, seed it. rand(3) is already
* seeded by the core proftpd code.
*/
int proxy_random_init(void) {
#ifdef HAVE_RANDOM
struct timeval tv;
gettimeofday(&tv, NULL);
srandom(getpid() ^ tv.tv_usec);
#endif /* HAVE_RANDOM */
return 0;
}
long proxy_random_next(long min, long max) {
long r, scaled;
#if defined(HAVE_RANDOM)
r = random();
pr_trace_msg(trace_channel, 22, "obtained r = %ld from random(3)", r);
#else
r = (long) rand();
pr_trace_msg(trace_channel, 22, "obtained r = %ld from rand(3)", r);
#endif /* HAVE_RANDOM */
scaled = r % (max - min + 1) + min;
pr_trace_msg(trace_channel, 15,
"yielding scaled r = %ld (r = %ld, max = %ld, min = %ld)", scaled,
r, max, min);
return scaled;
}
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