mirror of
https://github.com/ntop/n2n.git
synced 2024-09-19 16:41:11 +02:00
01f09e693e
* Same chance for all supernodes to be transmitted with REG_SUPER_ACK * Update sn_utils.c * Update random_numbers.h * Update sn_utils.c * Update random_numbers.c * Update sn_utils.c * Update sn_utils.c
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
/**
|
|
* (C) 2007-20 - ntop.org and contributors
|
|
*
|
|
* 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 3 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 see see <http://www.gnu.org/licenses/>
|
|
*
|
|
*/
|
|
|
|
|
|
#ifndef RND_H
|
|
#define RND_H
|
|
|
|
|
|
#include <stdint.h>
|
|
#include <stddef.h>
|
|
#include <time.h> // time, clock
|
|
|
|
#include "n2n.h" // traceEvent
|
|
|
|
// syscall and inquiring random number from hardware generators might fail, so we will retry
|
|
#define RND_RETRIES 1000
|
|
|
|
#if defined (__linux__)
|
|
#include <sys/syscall.h> // syscall, SYS_getrandom
|
|
#ifdef SYS_getrandom
|
|
#define GRND_NONBLOCK 1
|
|
#include <errno.h> // errno, EAGAIN
|
|
#endif
|
|
#endif
|
|
|
|
#if defined (__RDRND__) || defined (__RDSEED__)
|
|
#include <immintrin.h> // _rdrand64_step, rdseed4_step
|
|
#endif
|
|
|
|
/* The WIN32 code is still untested and thus commented, also see random_numbers.c
|
|
#if defined (WIN32)
|
|
#include <Wincrypt.h> // HCTYPTPROV, Crypt*-functions
|
|
#endif
|
|
*/
|
|
|
|
|
|
typedef struct rn_generator_state_t {
|
|
uint64_t a, b;
|
|
} rn_generator_state_t;
|
|
|
|
typedef struct splitmix64_state_t {
|
|
uint64_t s;
|
|
} splitmix64_state_t;
|
|
|
|
|
|
int n2n_srand (uint64_t seed);
|
|
|
|
uint64_t n2n_rand ();
|
|
|
|
uint64_t n2n_seed ();
|
|
|
|
uint32_t n2n_rand_sqr (uint32_t max_n);
|
|
|
|
|
|
#endif // RND_H
|