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52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/*
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* Copyright (C) 2017 Fundacion Inria Chile
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @{
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* @ingroup net
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* @file
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* @brief Implementation of OpenThread random platform abstraction
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*
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* @author Jose Ignacio Alamos <jialamos@uc.cl>
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* @}
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*/
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#include <stdint.h>
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#include "openthread/platform/random.h"
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#include "periph/cpuid.h"
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#include "random.h"
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#define ENABLE_DEBUG (0)
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#include "debug.h"
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/* init random */
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void ot_random_init(void)
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{
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#ifdef CPUID_LEN
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char cpu_id[CPUID_LEN];
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cpuid_get(cpu_id);
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uint32_t seed = 0;
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for (unsigned i = 0; i < CPUID_LEN; i++) {
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seed += cpu_id[i];
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}
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random_init(seed);
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#else
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#error "CPU not supported (current CPU doesn't provide CPUID, required for entropy)"
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#endif
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}
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/* OpenThread will call this to get a random number */
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uint32_t otPlatRandomGet(void)
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{
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uint32_t rand_val = random_uint32();
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DEBUG("otPlatRandomGet: %i\n", (int) rand_val);
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return rand_val;
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}
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