mbedTLS
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Outline
#include <mbedtls/build_info.h>
#include <sys/time.h>
#include "mbedtls/timing.h"
_hr_time
mbedtls_timing_get_timer(struct mbedtls_timing_hr_time *, int)
mbedtls_timing_set_delay(void *, uint32_t, uint32_t)
mbedtls_timing_get_delay(void *)
mbedtls_timing_get_final_delay(const mbedtls_timing_delay_context *)
Files
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SourceVuESP-IDF Framework and ExamplesmbedTLSport/esp_timing.c
 
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/* * Portable interface to the CPU cycle counter * * SPDX-FileCopyrightText: The Mbed TLS Contributors * * SPDX-License-Identifier: Apache-2.0 * * SPDX-FileContributor: 2016-2022 Espressif Systems (Shanghai) CO LTD *//* ... */ /* * mbedtls_timing_get_timer()m mbedtls_timing_set_delay() and * mbedtls_timing_set_delay only abstracted from mbedtls/library/timing.c * as that does not build on ESP-IDF but these 2 functions are needed for * DTLS (in particular mbedtls_ssl_set_timer_cb() must be called for DTLS * which requires these 2 delay functions). *//* ... */ #include <mbedtls/build_info.h> #if !defined(MBEDTLS_ESP_TIMING_C) #include <sys/time.h> #include "mbedtls/timing.h" struct _hr_time { struct timeval start; }{ ... }; unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset ) { struct _hr_time *t = (struct _hr_time *) val; if( reset ) { gettimeofday( &t->start, NULL ); return( 0 ); }{...} else { unsigned long delta; struct timeval now; gettimeofday( &now, NULL ); delta = ( now.tv_sec - t->start.tv_sec ) * 1000ul + ( now.tv_usec - t->start.tv_usec ) / 1000; return( delta ); }{...} }{ ... } /* * Set delays to watch *//* ... */ void mbedtls_timing_set_delay( void *data, uint32_t int_ms, uint32_t fin_ms ) { mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data; ctx->MBEDTLS_PRIVATE(int_ms) = int_ms; ctx->MBEDTLS_PRIVATE(fin_ms) = fin_ms; if( fin_ms != 0 ) (void) mbedtls_timing_get_timer( &ctx->MBEDTLS_PRIVATE(timer), 1 ); }{ ... } /* * Get number of delays expired *//* ... */ int mbedtls_timing_get_delay( void *data ) { mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data; unsigned long elapsed_ms; if( ctx->MBEDTLS_PRIVATE(fin_ms) == 0 ) return( -1 ); elapsed_ms = mbedtls_timing_get_timer( &ctx->MBEDTLS_PRIVATE(timer), 0 ); if( elapsed_ms >= ctx->MBEDTLS_PRIVATE(fin_ms) ) return( 2 ); if( elapsed_ms >= ctx->MBEDTLS_PRIVATE(int_ms) ) return( 1 ); return( 0 ); }{ ... } /* * Get the final delay. *//* ... */ uint32_t mbedtls_timing_get_final_delay( const mbedtls_timing_delay_context *data ) { return( data->MBEDTLS_PRIVATE(fin_ms) ); }{ ... } /* ... */#endif /* MBEDTLS_ESP_TIMING_C */
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