Avnet / WNCInterface

The WDCInterface is is a drop-in replacement for an EthernetInterface class that allows the user to connect to the Internet with a Wistron NeWeb Corporation (WNC) M14A2A Series data module using the standard network Socket API's. This interface class is used in the AT&T Cellular IoT Starter Kit which is sold by Avnet (http://cloudconnectkits.org/product/att-cellular-iot-starter-kit).

Dependencies:   WncControllerK64F

Dependents:   WNCProximityMqtt Pubnub_ATT_IoT_SK_WNC_sync BluemixDemo BluemixQS ... more

See the WNCInterface README in the Wiki tab for detailed information on this library.

mbedtls/source/timing.c@29:b278b745fb4f, 2017-03-24 (annotated)

Committer:
JMF
Date:
Fri Mar 24 22:26:23 2017 +0000
Revision:
29:b278b745fb4f
Parent:
12:0071cb144c7a 
updated Class name of TCPSocketConnection to WncTCPSocketConnection;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JMF 12:0071cb144c7a 1 /*
JMF 12:0071cb144c7a 2 * Portable interface to the CPU cycle counter
JMF 12:0071cb144c7a 3 *
JMF 12:0071cb144c7a 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
JMF 12:0071cb144c7a 5 * SPDX-License-Identifier: Apache-2.0
JMF 12:0071cb144c7a 6 *
JMF 12:0071cb144c7a 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
JMF 12:0071cb144c7a 8 * not use this file except in compliance with the License.
JMF 12:0071cb144c7a 9 * You may obtain a copy of the License at
JMF 12:0071cb144c7a 10 *
JMF 12:0071cb144c7a 11 * http://www.apache.org/licenses/LICENSE-2.0
JMF 12:0071cb144c7a 12 *
JMF 12:0071cb144c7a 13 * Unless required by applicable law or agreed to in writing, software
JMF 12:0071cb144c7a 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
JMF 12:0071cb144c7a 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
JMF 12:0071cb144c7a 16 * See the License for the specific language governing permissions and
JMF 12:0071cb144c7a 17 * limitations under the License.
JMF 12:0071cb144c7a 18 *
JMF 12:0071cb144c7a 19 * This file is part of mbed TLS (https://tls.mbed.org)
JMF 12:0071cb144c7a 20 */
JMF 12:0071cb144c7a 21
JMF 12:0071cb144c7a 22 #if !defined(MBEDTLS_CONFIG_FILE)
JMF 12:0071cb144c7a 23 #include "mbedtls/config.h"
JMF 12:0071cb144c7a 24 #else
JMF 12:0071cb144c7a 25 #include MBEDTLS_CONFIG_FILE
JMF 12:0071cb144c7a 26 #endif
JMF 12:0071cb144c7a 27
JMF 12:0071cb144c7a 28 #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_PLATFORM_C)
JMF 12:0071cb144c7a 29 #include "mbedtls/platform.h"
JMF 12:0071cb144c7a 30 #else
JMF 12:0071cb144c7a 31 #include <stdio.h>
JMF 12:0071cb144c7a 32 #define mbedtls_printf pc.printf
JMF 12:0071cb144c7a 33 #endif
JMF 12:0071cb144c7a 34
JMF 12:0071cb144c7a 35 #if defined(MBEDTLS_TIMING_C)
JMF 12:0071cb144c7a 36
JMF 12:0071cb144c7a 37 #include "mbedtls/timing.h"
JMF 12:0071cb144c7a 38
JMF 12:0071cb144c7a 39 #if !defined(MBEDTLS_TIMING_ALT)
JMF 12:0071cb144c7a 40
JMF 12:0071cb144c7a 41 #if !defined(unix) && !defined(__unix__) && !defined(__unix) && \
JMF 12:0071cb144c7a 42 !defined(__APPLE__) && !defined(_WIN32)
JMF 12:0071cb144c7a 43 #error "This module only works on Unix and Windows, see MBEDTLS_TIMING_C in config.h"
JMF 12:0071cb144c7a 44 #endif
JMF 12:0071cb144c7a 45
JMF 12:0071cb144c7a 46 #ifndef asm
JMF 12:0071cb144c7a 47 #define asm __asm
JMF 12:0071cb144c7a 48 #endif
JMF 12:0071cb144c7a 49
JMF 12:0071cb144c7a 50 #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
JMF 12:0071cb144c7a 51
JMF 12:0071cb144c7a 52 #include <windows.h>
JMF 12:0071cb144c7a 53 #include <winbase.h>
JMF 12:0071cb144c7a 54
JMF 12:0071cb144c7a 55 struct _hr_time
JMF 12:0071cb144c7a 56 {
JMF 12:0071cb144c7a 57 LARGE_INTEGER start;
JMF 12:0071cb144c7a 58 };
JMF 12:0071cb144c7a 59
JMF 12:0071cb144c7a 60 #else
JMF 12:0071cb144c7a 61
JMF 12:0071cb144c7a 62 #include <unistd.h>
JMF 12:0071cb144c7a 63 #include <sys/types.h>
JMF 12:0071cb144c7a 64 #include <sys/time.h>
JMF 12:0071cb144c7a 65 #include <signal.h>
JMF 12:0071cb144c7a 66 #include <time.h>
JMF 12:0071cb144c7a 67
JMF 12:0071cb144c7a 68 struct _hr_time
JMF 12:0071cb144c7a 69 {
JMF 12:0071cb144c7a 70 struct timeval start;
JMF 12:0071cb144c7a 71 };
JMF 12:0071cb144c7a 72
JMF 12:0071cb144c7a 73 #endif /* _WIN32 && !EFIX64 && !EFI32 */
JMF 12:0071cb144c7a 74
JMF 12:0071cb144c7a 75 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
JMF 12:0071cb144c7a 76 ( defined(_MSC_VER) && defined(_M_IX86) ) || defined(__WATCOMC__)
JMF 12:0071cb144c7a 77
JMF 12:0071cb144c7a 78 #define HAVE_HARDCLOCK
JMF 12:0071cb144c7a 79
JMF 12:0071cb144c7a 80 unsigned long mbedtls_timing_hardclock( void )
JMF 12:0071cb144c7a 81 {
JMF 12:0071cb144c7a 82 unsigned long tsc;
JMF 12:0071cb144c7a 83 __asm rdtsc
JMF 12:0071cb144c7a 84 __asm mov [tsc], eax
JMF 12:0071cb144c7a 85 return( tsc );
JMF 12:0071cb144c7a 86 }
JMF 12:0071cb144c7a 87 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
JMF 12:0071cb144c7a 88 ( _MSC_VER && _M_IX86 ) || __WATCOMC__ */
JMF 12:0071cb144c7a 89
JMF 12:0071cb144c7a 90 /* some versions of mingw-64 have 32-bit longs even on x84_64 */
JMF 12:0071cb144c7a 91 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
JMF 12:0071cb144c7a 92 defined(__GNUC__) && ( defined(__i386__) || ( \
JMF 12:0071cb144c7a 93 ( defined(__amd64__) || defined( __x86_64__) ) && __SIZEOF_LONG__ == 4 ) )
JMF 12:0071cb144c7a 94
JMF 12:0071cb144c7a 95 #define HAVE_HARDCLOCK
JMF 12:0071cb144c7a 96
JMF 12:0071cb144c7a 97 unsigned long mbedtls_timing_hardclock( void )
JMF 12:0071cb144c7a 98 {
JMF 12:0071cb144c7a 99 unsigned long lo, hi;
JMF 12:0071cb144c7a 100 asm volatile( "rdtsc" : "=a" (lo), "=d" (hi) );
JMF 12:0071cb144c7a 101 return( lo );
JMF 12:0071cb144c7a 102 }
JMF 12:0071cb144c7a 103 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
JMF 12:0071cb144c7a 104 __GNUC__ && __i386__ */
JMF 12:0071cb144c7a 105
JMF 12:0071cb144c7a 106 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
JMF 12:0071cb144c7a 107 defined(__GNUC__) && ( defined(__amd64__) || defined(__x86_64__) )
JMF 12:0071cb144c7a 108
JMF 12:0071cb144c7a 109 #define HAVE_HARDCLOCK
JMF 12:0071cb144c7a 110
JMF 12:0071cb144c7a 111 unsigned long mbedtls_timing_hardclock( void )
JMF 12:0071cb144c7a 112 {
JMF 12:0071cb144c7a 113 unsigned long lo, hi;
JMF 12:0071cb144c7a 114 asm volatile( "rdtsc" : "=a" (lo), "=d" (hi) );
JMF 12:0071cb144c7a 115 return( lo | ( hi << 32 ) );
JMF 12:0071cb144c7a 116 }
JMF 12:0071cb144c7a 117 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
JMF 12:0071cb144c7a 118 __GNUC__ && ( __amd64__ || __x86_64__ ) */
JMF 12:0071cb144c7a 119
JMF 12:0071cb144c7a 120 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
JMF 12:0071cb144c7a 121 defined(__GNUC__) && ( defined(__powerpc__) || defined(__ppc__) )
JMF 12:0071cb144c7a 122
JMF 12:0071cb144c7a 123 #define HAVE_HARDCLOCK
JMF 12:0071cb144c7a 124
JMF 12:0071cb144c7a 125 unsigned long mbedtls_timing_hardclock( void )
JMF 12:0071cb144c7a 126 {
JMF 12:0071cb144c7a 127 unsigned long tbl, tbu0, tbu1;
JMF 12:0071cb144c7a 128
JMF 12:0071cb144c7a 129 do
JMF 12:0071cb144c7a 130 {
JMF 12:0071cb144c7a 131 asm volatile( "mftbu %0" : "=r" (tbu0) );
JMF 12:0071cb144c7a 132 asm volatile( "mftb %0" : "=r" (tbl ) );
JMF 12:0071cb144c7a 133 asm volatile( "mftbu %0" : "=r" (tbu1) );
JMF 12:0071cb144c7a 134 }
JMF 12:0071cb144c7a 135 while( tbu0 != tbu1 );
JMF 12:0071cb144c7a 136
JMF 12:0071cb144c7a 137 return( tbl );
JMF 12:0071cb144c7a 138 }
JMF 12:0071cb144c7a 139 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
JMF 12:0071cb144c7a 140 __GNUC__ && ( __powerpc__ || __ppc__ ) */
JMF 12:0071cb144c7a 141
JMF 12:0071cb144c7a 142 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
JMF 12:0071cb144c7a 143 defined(__GNUC__) && defined(__sparc64__)
JMF 12:0071cb144c7a 144
JMF 12:0071cb144c7a 145 #if defined(__OpenBSD__)
JMF 12:0071cb144c7a 146 #warning OpenBSD does not allow access to tick register using software version instead
JMF 12:0071cb144c7a 147 #else
JMF 12:0071cb144c7a 148 #define HAVE_HARDCLOCK
JMF 12:0071cb144c7a 149
JMF 12:0071cb144c7a 150 unsigned long mbedtls_timing_hardclock( void )
JMF 12:0071cb144c7a 151 {
JMF 12:0071cb144c7a 152 unsigned long tick;
JMF 12:0071cb144c7a 153 asm volatile( "rdpr %%tick, %0;" : "=&r" (tick) );
JMF 12:0071cb144c7a 154 return( tick );
JMF 12:0071cb144c7a 155 }
JMF 12:0071cb144c7a 156 #endif /* __OpenBSD__ */
JMF 12:0071cb144c7a 157 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
JMF 12:0071cb144c7a 158 __GNUC__ && __sparc64__ */
JMF 12:0071cb144c7a 159
JMF 12:0071cb144c7a 160 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
JMF 12:0071cb144c7a 161 defined(__GNUC__) && defined(__sparc__) && !defined(__sparc64__)
JMF 12:0071cb144c7a 162
JMF 12:0071cb144c7a 163 #define HAVE_HARDCLOCK
JMF 12:0071cb144c7a 164
JMF 12:0071cb144c7a 165 unsigned long mbedtls_timing_hardclock( void )
JMF 12:0071cb144c7a 166 {
JMF 12:0071cb144c7a 167 unsigned long tick;
JMF 12:0071cb144c7a 168 asm volatile( ".byte 0x83, 0x41, 0x00, 0x00" );
JMF 12:0071cb144c7a 169 asm volatile( "mov %%g1, %0" : "=r" (tick) );
JMF 12:0071cb144c7a 170 return( tick );
JMF 12:0071cb144c7a 171 }
JMF 12:0071cb144c7a 172 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
JMF 12:0071cb144c7a 173 __GNUC__ && __sparc__ && !__sparc64__ */
JMF 12:0071cb144c7a 174
JMF 12:0071cb144c7a 175 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
JMF 12:0071cb144c7a 176 defined(__GNUC__) && defined(__alpha__)
JMF 12:0071cb144c7a 177
JMF 12:0071cb144c7a 178 #define HAVE_HARDCLOCK
JMF 12:0071cb144c7a 179
JMF 12:0071cb144c7a 180 unsigned long mbedtls_timing_hardclock( void )
JMF 12:0071cb144c7a 181 {
JMF 12:0071cb144c7a 182 unsigned long cc;
JMF 12:0071cb144c7a 183 asm volatile( "rpcc %0" : "=r" (cc) );
JMF 12:0071cb144c7a 184 return( cc & 0xFFFFFFFF );
JMF 12:0071cb144c7a 185 }
JMF 12:0071cb144c7a 186 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
JMF 12:0071cb144c7a 187 __GNUC__ && __alpha__ */
JMF 12:0071cb144c7a 188
JMF 12:0071cb144c7a 189 #if !defined(HAVE_HARDCLOCK) && defined(MBEDTLS_HAVE_ASM) && \
JMF 12:0071cb144c7a 190 defined(__GNUC__) && defined(__ia64__)
JMF 12:0071cb144c7a 191
JMF 12:0071cb144c7a 192 #define HAVE_HARDCLOCK
JMF 12:0071cb144c7a 193
JMF 12:0071cb144c7a 194 unsigned long mbedtls_timing_hardclock( void )
JMF 12:0071cb144c7a 195 {
JMF 12:0071cb144c7a 196 unsigned long itc;
JMF 12:0071cb144c7a 197 asm volatile( "mov %0 = ar.itc" : "=r" (itc) );
JMF 12:0071cb144c7a 198 return( itc );
JMF 12:0071cb144c7a 199 }
JMF 12:0071cb144c7a 200 #endif /* !HAVE_HARDCLOCK && MBEDTLS_HAVE_ASM &&
JMF 12:0071cb144c7a 201 __GNUC__ && __ia64__ */
JMF 12:0071cb144c7a 202
JMF 12:0071cb144c7a 203 #if !defined(HAVE_HARDCLOCK) && defined(_MSC_VER) && \
JMF 12:0071cb144c7a 204 !defined(EFIX64) && !defined(EFI32)
JMF 12:0071cb144c7a 205
JMF 12:0071cb144c7a 206 #define HAVE_HARDCLOCK
JMF 12:0071cb144c7a 207
JMF 12:0071cb144c7a 208 unsigned long mbedtls_timing_hardclock( void )
JMF 12:0071cb144c7a 209 {
JMF 12:0071cb144c7a 210 LARGE_INTEGER offset;
JMF 12:0071cb144c7a 211
JMF 12:0071cb144c7a 212 QueryPerformanceCounter( &offset );
JMF 12:0071cb144c7a 213
JMF 12:0071cb144c7a 214 return( (unsigned long)( offset.QuadPart ) );
JMF 12:0071cb144c7a 215 }
JMF 12:0071cb144c7a 216 #endif /* !HAVE_HARDCLOCK && _MSC_VER && !EFIX64 && !EFI32 */
JMF 12:0071cb144c7a 217
JMF 12:0071cb144c7a 218 #if !defined(HAVE_HARDCLOCK)
JMF 12:0071cb144c7a 219
JMF 12:0071cb144c7a 220 #define HAVE_HARDCLOCK
JMF 12:0071cb144c7a 221
JMF 12:0071cb144c7a 222 static int hardclock_init = 0;
JMF 12:0071cb144c7a 223 static struct timeval tv_init;
JMF 12:0071cb144c7a 224
JMF 12:0071cb144c7a 225 unsigned long mbedtls_timing_hardclock( void )
JMF 12:0071cb144c7a 226 {
JMF 12:0071cb144c7a 227 struct timeval tv_cur;
JMF 12:0071cb144c7a 228
JMF 12:0071cb144c7a 229 if( hardclock_init == 0 )
JMF 12:0071cb144c7a 230 {
JMF 12:0071cb144c7a 231 gettimeofday( &tv_init, NULL );
JMF 12:0071cb144c7a 232 hardclock_init = 1;
JMF 12:0071cb144c7a 233 }
JMF 12:0071cb144c7a 234
JMF 12:0071cb144c7a 235 gettimeofday( &tv_cur, NULL );
JMF 12:0071cb144c7a 236 return( ( tv_cur.tv_sec - tv_init.tv_sec ) * 1000000
JMF 12:0071cb144c7a 237 + ( tv_cur.tv_usec - tv_init.tv_usec ) );
JMF 12:0071cb144c7a 238 }
JMF 12:0071cb144c7a 239 #endif /* !HAVE_HARDCLOCK */
JMF 12:0071cb144c7a 240
JMF 12:0071cb144c7a 241 volatile int mbedtls_timing_alarmed = 0;
JMF 12:0071cb144c7a 242
JMF 12:0071cb144c7a 243 #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
JMF 12:0071cb144c7a 244
JMF 12:0071cb144c7a 245 unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset )
JMF 12:0071cb144c7a 246 {
JMF 12:0071cb144c7a 247 unsigned long delta;
JMF 12:0071cb144c7a 248 LARGE_INTEGER offset, hfreq;
JMF 12:0071cb144c7a 249 struct _hr_time *t = (struct _hr_time *) val;
JMF 12:0071cb144c7a 250
JMF 12:0071cb144c7a 251 QueryPerformanceCounter( &offset );
JMF 12:0071cb144c7a 252 QueryPerformanceFrequency( &hfreq );
JMF 12:0071cb144c7a 253
JMF 12:0071cb144c7a 254 delta = (unsigned long)( ( 1000 *
JMF 12:0071cb144c7a 255 ( offset.QuadPart - t->start.QuadPart ) ) /
JMF 12:0071cb144c7a 256 hfreq.QuadPart );
JMF 12:0071cb144c7a 257
JMF 12:0071cb144c7a 258 if( reset )
JMF 12:0071cb144c7a 259 QueryPerformanceCounter( &t->start );
JMF 12:0071cb144c7a 260
JMF 12:0071cb144c7a 261 return( delta );
JMF 12:0071cb144c7a 262 }
JMF 12:0071cb144c7a 263
JMF 12:0071cb144c7a 264 /* It's OK to use a global because alarm() is supposed to be global anyway */
JMF 12:0071cb144c7a 265 static DWORD alarmMs;
JMF 12:0071cb144c7a 266
JMF 12:0071cb144c7a 267 static DWORD WINAPI TimerProc( LPVOID TimerContext )
JMF 12:0071cb144c7a 268 {
JMF 12:0071cb144c7a 269 ((void) TimerContext);
JMF 12:0071cb144c7a 270 Sleep( alarmMs );
JMF 12:0071cb144c7a 271 mbedtls_timing_alarmed = 1;
JMF 12:0071cb144c7a 272 return( TRUE );
JMF 12:0071cb144c7a 273 }
JMF 12:0071cb144c7a 274
JMF 12:0071cb144c7a 275 void mbedtls_set_alarm( int seconds )
JMF 12:0071cb144c7a 276 {
JMF 12:0071cb144c7a 277 DWORD ThreadId;
JMF 12:0071cb144c7a 278
JMF 12:0071cb144c7a 279 mbedtls_timing_alarmed = 0;
JMF 12:0071cb144c7a 280 alarmMs = seconds * 1000;
JMF 12:0071cb144c7a 281 CloseHandle( CreateThread( NULL, 0, TimerProc, NULL, 0, &ThreadId ) );
JMF 12:0071cb144c7a 282 }
JMF 12:0071cb144c7a 283
JMF 12:0071cb144c7a 284 #else /* _WIN32 && !EFIX64 && !EFI32 */
JMF 12:0071cb144c7a 285
JMF 12:0071cb144c7a 286 unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset )
JMF 12:0071cb144c7a 287 {
JMF 12:0071cb144c7a 288 unsigned long delta;
JMF 12:0071cb144c7a 289 struct timeval offset;
JMF 12:0071cb144c7a 290 struct _hr_time *t = (struct _hr_time *) val;
JMF 12:0071cb144c7a 291
JMF 12:0071cb144c7a 292 gettimeofday( &offset, NULL );
JMF 12:0071cb144c7a 293
JMF 12:0071cb144c7a 294 if( reset )
JMF 12:0071cb144c7a 295 {
JMF 12:0071cb144c7a 296 t->start.tv_sec = offset.tv_sec;
JMF 12:0071cb144c7a 297 t->start.tv_usec = offset.tv_usec;
JMF 12:0071cb144c7a 298 return( 0 );
JMF 12:0071cb144c7a 299 }
JMF 12:0071cb144c7a 300
JMF 12:0071cb144c7a 301 delta = ( offset.tv_sec - t->start.tv_sec ) * 1000
JMF 12:0071cb144c7a 302 + ( offset.tv_usec - t->start.tv_usec ) / 1000;
JMF 12:0071cb144c7a 303
JMF 12:0071cb144c7a 304 return( delta );
JMF 12:0071cb144c7a 305 }
JMF 12:0071cb144c7a 306
JMF 12:0071cb144c7a 307 static void sighandler( int signum )
JMF 12:0071cb144c7a 308 {
JMF 12:0071cb144c7a 309 mbedtls_timing_alarmed = 1;
JMF 12:0071cb144c7a 310 signal( signum, sighandler );
JMF 12:0071cb144c7a 311 }
JMF 12:0071cb144c7a 312
JMF 12:0071cb144c7a 313 void mbedtls_set_alarm( int seconds )
JMF 12:0071cb144c7a 314 {
JMF 12:0071cb144c7a 315 mbedtls_timing_alarmed = 0;
JMF 12:0071cb144c7a 316 signal( SIGALRM, sighandler );
JMF 12:0071cb144c7a 317 alarm( seconds );
JMF 12:0071cb144c7a 318 }
JMF 12:0071cb144c7a 319
JMF 12:0071cb144c7a 320 #endif /* _WIN32 && !EFIX64 && !EFI32 */
JMF 12:0071cb144c7a 321
JMF 12:0071cb144c7a 322 /*
JMF 12:0071cb144c7a 323 * Set delays to watch
JMF 12:0071cb144c7a 324 */
JMF 12:0071cb144c7a 325 void mbedtls_timing_set_delay( void *data, uint32_t int_ms, uint32_t fin_ms )
JMF 12:0071cb144c7a 326 {
JMF 12:0071cb144c7a 327 mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
JMF 12:0071cb144c7a 328
JMF 12:0071cb144c7a 329 ctx->int_ms = int_ms;
JMF 12:0071cb144c7a 330 ctx->fin_ms = fin_ms;
JMF 12:0071cb144c7a 331
JMF 12:0071cb144c7a 332 if( fin_ms != 0 )
JMF 12:0071cb144c7a 333 (void) mbedtls_timing_get_timer( &ctx->timer, 1 );
JMF 12:0071cb144c7a 334 }
JMF 12:0071cb144c7a 335
JMF 12:0071cb144c7a 336 /*
JMF 12:0071cb144c7a 337 * Get number of delays expired
JMF 12:0071cb144c7a 338 */
JMF 12:0071cb144c7a 339 int mbedtls_timing_get_delay( void *data )
JMF 12:0071cb144c7a 340 {
JMF 12:0071cb144c7a 341 mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
JMF 12:0071cb144c7a 342 unsigned long elapsed_ms;
JMF 12:0071cb144c7a 343
JMF 12:0071cb144c7a 344 if( ctx->fin_ms == 0 )
JMF 12:0071cb144c7a 345 return( -1 );
JMF 12:0071cb144c7a 346
JMF 12:0071cb144c7a 347 elapsed_ms = mbedtls_timing_get_timer( &ctx->timer, 0 );
JMF 12:0071cb144c7a 348
JMF 12:0071cb144c7a 349 if( elapsed_ms >= ctx->fin_ms )
JMF 12:0071cb144c7a 350 return( 2 );
JMF 12:0071cb144c7a 351
JMF 12:0071cb144c7a 352 if( elapsed_ms >= ctx->int_ms )
JMF 12:0071cb144c7a 353 return( 1 );
JMF 12:0071cb144c7a 354
JMF 12:0071cb144c7a 355 return( 0 );
JMF 12:0071cb144c7a 356 }
JMF 12:0071cb144c7a 357
JMF 12:0071cb144c7a 358 #endif /* !MBEDTLS_TIMING_ALT */
JMF 12:0071cb144c7a 359
JMF 12:0071cb144c7a 360 #if defined(MBEDTLS_SELF_TEST)
JMF 12:0071cb144c7a 361
JMF 12:0071cb144c7a 362 /*
JMF 12:0071cb144c7a 363 * Busy-waits for the given number of milliseconds.
JMF 12:0071cb144c7a 364 * Used for testing mbedtls_timing_hardclock.
JMF 12:0071cb144c7a 365 */
JMF 12:0071cb144c7a 366 static void busy_msleep( unsigned long msec )
JMF 12:0071cb144c7a 367 {
JMF 12:0071cb144c7a 368 struct mbedtls_timing_hr_time hires;
JMF 12:0071cb144c7a 369 unsigned long i = 0; /* for busy-waiting */
JMF 12:0071cb144c7a 370 volatile unsigned long j; /* to prevent optimisation */
JMF 12:0071cb144c7a 371
JMF 12:0071cb144c7a 372 (void) mbedtls_timing_get_timer( &hires, 1 );
JMF 12:0071cb144c7a 373
JMF 12:0071cb144c7a 374 while( mbedtls_timing_get_timer( &hires, 0 ) < msec )
JMF 12:0071cb144c7a 375 i++;
JMF 12:0071cb144c7a 376
JMF 12:0071cb144c7a 377 j = i;
JMF 12:0071cb144c7a 378 (void) j;
JMF 12:0071cb144c7a 379 }
JMF 12:0071cb144c7a 380
JMF 12:0071cb144c7a 381 #define FAIL do \
JMF 12:0071cb144c7a 382 { \
JMF 12:0071cb144c7a 383 if( verbose != 0 ) \
JMF 12:0071cb144c7a 384 mbedtls_printf( "failed\n" ); \
JMF 12:0071cb144c7a 385 \
JMF 12:0071cb144c7a 386 return( 1 ); \
JMF 12:0071cb144c7a 387 } while( 0 )
JMF 12:0071cb144c7a 388
JMF 12:0071cb144c7a 389 /*
JMF 12:0071cb144c7a 390 * Checkup routine
JMF 12:0071cb144c7a 391 *
JMF 12:0071cb144c7a 392 * Warning: this is work in progress, some tests may not be reliable enough
JMF 12:0071cb144c7a 393 * yet! False positives may happen.
JMF 12:0071cb144c7a 394 */
JMF 12:0071cb144c7a 395 int mbedtls_timing_self_test( int verbose )
JMF 12:0071cb144c7a 396 {
JMF 12:0071cb144c7a 397 unsigned long cycles, ratio;
JMF 12:0071cb144c7a 398 unsigned long millisecs, secs;
JMF 12:0071cb144c7a 399 int hardfail;
JMF 12:0071cb144c7a 400 struct mbedtls_timing_hr_time hires;
JMF 12:0071cb144c7a 401 uint32_t a, b;
JMF 12:0071cb144c7a 402 mbedtls_timing_delay_context ctx;
JMF 12:0071cb144c7a 403
JMF 12:0071cb144c7a 404 if( verbose != 0 )
JMF 12:0071cb144c7a 405 mbedtls_printf( " TIMING tests note: will take some time!\n" );
JMF 12:0071cb144c7a 406
JMF 12:0071cb144c7a 407
JMF 12:0071cb144c7a 408 if( verbose != 0 )
JMF 12:0071cb144c7a 409 mbedtls_printf( " TIMING test #1 (set_alarm / get_timer): " );
JMF 12:0071cb144c7a 410
JMF 12:0071cb144c7a 411 for( secs = 1; secs <= 3; secs++ )
JMF 12:0071cb144c7a 412 {
JMF 12:0071cb144c7a 413 (void) mbedtls_timing_get_timer( &hires, 1 );
JMF 12:0071cb144c7a 414
JMF 12:0071cb144c7a 415 mbedtls_set_alarm( (int) secs );
JMF 12:0071cb144c7a 416 while( !mbedtls_timing_alarmed )
JMF 12:0071cb144c7a 417 ;
JMF 12:0071cb144c7a 418
JMF 12:0071cb144c7a 419 millisecs = mbedtls_timing_get_timer( &hires, 0 );
JMF 12:0071cb144c7a 420
JMF 12:0071cb144c7a 421 /* For some reason on Windows it looks like alarm has an extra delay
JMF 12:0071cb144c7a 422 * (maybe related to creating a new thread). Allow some room here. */
JMF 12:0071cb144c7a 423 if( millisecs < 800 * secs || millisecs > 1200 * secs + 300 )
JMF 12:0071cb144c7a 424 {
JMF 12:0071cb144c7a 425 if( verbose != 0 )
JMF 12:0071cb144c7a 426 mbedtls_printf( "failed\n" );
JMF 12:0071cb144c7a 427
JMF 12:0071cb144c7a 428 return( 1 );
JMF 12:0071cb144c7a 429 }
JMF 12:0071cb144c7a 430 }
JMF 12:0071cb144c7a 431
JMF 12:0071cb144c7a 432 if( verbose != 0 )
JMF 12:0071cb144c7a 433 mbedtls_printf( "passed\n" );
JMF 12:0071cb144c7a 434
JMF 12:0071cb144c7a 435 if( verbose != 0 )
JMF 12:0071cb144c7a 436 mbedtls_printf( " TIMING test #2 (set/get_delay ): " );
JMF 12:0071cb144c7a 437
JMF 12:0071cb144c7a 438 for( a = 200; a <= 400; a += 200 )
JMF 12:0071cb144c7a 439 {
JMF 12:0071cb144c7a 440 for( b = 200; b <= 400; b += 200 )
JMF 12:0071cb144c7a 441 {
JMF 12:0071cb144c7a 442 mbedtls_timing_set_delay( &ctx, a, a + b );
JMF 12:0071cb144c7a 443
JMF 12:0071cb144c7a 444 busy_msleep( a - a / 8 );
JMF 12:0071cb144c7a 445 if( mbedtls_timing_get_delay( &ctx ) != 0 )
JMF 12:0071cb144c7a 446 FAIL;
JMF 12:0071cb144c7a 447
JMF 12:0071cb144c7a 448 busy_msleep( a / 4 );
JMF 12:0071cb144c7a 449 if( mbedtls_timing_get_delay( &ctx ) != 1 )
JMF 12:0071cb144c7a 450 FAIL;
JMF 12:0071cb144c7a 451
JMF 12:0071cb144c7a 452 busy_msleep( b - a / 8 - b / 8 );
JMF 12:0071cb144c7a 453 if( mbedtls_timing_get_delay( &ctx ) != 1 )
JMF 12:0071cb144c7a 454 FAIL;
JMF 12:0071cb144c7a 455
JMF 12:0071cb144c7a 456 busy_msleep( b / 4 );
JMF 12:0071cb144c7a 457 if( mbedtls_timing_get_delay( &ctx ) != 2 )
JMF 12:0071cb144c7a 458 FAIL;
JMF 12:0071cb144c7a 459 }
JMF 12:0071cb144c7a 460 }
JMF 12:0071cb144c7a 461
JMF 12:0071cb144c7a 462 mbedtls_timing_set_delay( &ctx, 0, 0 );
JMF 12:0071cb144c7a 463 busy_msleep( 200 );
JMF 12:0071cb144c7a 464 if( mbedtls_timing_get_delay( &ctx ) != -1 )
JMF 12:0071cb144c7a 465 FAIL;
JMF 12:0071cb144c7a 466
JMF 12:0071cb144c7a 467 if( verbose != 0 )
JMF 12:0071cb144c7a 468 mbedtls_printf( "passed\n" );
JMF 12:0071cb144c7a 469
JMF 12:0071cb144c7a 470 if( verbose != 0 )
JMF 12:0071cb144c7a 471 mbedtls_printf( " TIMING test #3 (hardclock / get_timer): " );
JMF 12:0071cb144c7a 472
JMF 12:0071cb144c7a 473 /*
JMF 12:0071cb144c7a 474 * Allow one failure for possible counter wrapping.
JMF 12:0071cb144c7a 475 * On a 4Ghz 32-bit machine the cycle counter wraps about once per second;
JMF 12:0071cb144c7a 476 * since the whole test is about 10ms, it shouldn't happen twice in a row.
JMF 12:0071cb144c7a 477 */
JMF 12:0071cb144c7a 478 hardfail = 0;
JMF 12:0071cb144c7a 479
JMF 12:0071cb144c7a 480 hard_test:
JMF 12:0071cb144c7a 481 if( hardfail > 1 )
JMF 12:0071cb144c7a 482 {
JMF 12:0071cb144c7a 483 if( verbose != 0 )
JMF 12:0071cb144c7a 484 mbedtls_printf( "failed (ignored)\n" );
JMF 12:0071cb144c7a 485
JMF 12:0071cb144c7a 486 goto hard_test_done;
JMF 12:0071cb144c7a 487 }
JMF 12:0071cb144c7a 488
JMF 12:0071cb144c7a 489 /* Get a reference ratio cycles/ms */
JMF 12:0071cb144c7a 490 millisecs = 1;
JMF 12:0071cb144c7a 491 cycles = mbedtls_timing_hardclock();
JMF 12:0071cb144c7a 492 busy_msleep( millisecs );
JMF 12:0071cb144c7a 493 cycles = mbedtls_timing_hardclock() - cycles;
JMF 12:0071cb144c7a 494 ratio = cycles / millisecs;
JMF 12:0071cb144c7a 495
JMF 12:0071cb144c7a 496 /* Check that the ratio is mostly constant */
JMF 12:0071cb144c7a 497 for( millisecs = 2; millisecs <= 4; millisecs++ )
JMF 12:0071cb144c7a 498 {
JMF 12:0071cb144c7a 499 cycles = mbedtls_timing_hardclock();
JMF 12:0071cb144c7a 500 busy_msleep( millisecs );
JMF 12:0071cb144c7a 501 cycles = mbedtls_timing_hardclock() - cycles;
JMF 12:0071cb144c7a 502
JMF 12:0071cb144c7a 503 /* Allow variation up to 20% */
JMF 12:0071cb144c7a 504 if( cycles / millisecs < ratio - ratio / 5 ||
JMF 12:0071cb144c7a 505 cycles / millisecs > ratio + ratio / 5 )
JMF 12:0071cb144c7a 506 {
JMF 12:0071cb144c7a 507 hardfail++;
JMF 12:0071cb144c7a 508 goto hard_test;
JMF 12:0071cb144c7a 509 }
JMF 12:0071cb144c7a 510 }
JMF 12:0071cb144c7a 511
JMF 12:0071cb144c7a 512 if( verbose != 0 )
JMF 12:0071cb144c7a 513 mbedtls_printf( "passed\n" );
JMF 12:0071cb144c7a 514
JMF 12:0071cb144c7a 515 hard_test_done:
JMF 12:0071cb144c7a 516
JMF 12:0071cb144c7a 517 if( verbose != 0 )
JMF 12:0071cb144c7a 518 mbedtls_printf( "\n" );
JMF 12:0071cb144c7a 519
JMF 12:0071cb144c7a 520 return( 0 );
JMF 12:0071cb144c7a 521 }
JMF 12:0071cb144c7a 522
JMF 12:0071cb144c7a 523 #endif /* MBEDTLS_SELF_TEST */
JMF 12:0071cb144c7a 524
JMF 12:0071cb144c7a 525 #endif /* MBEDTLS_TIMING_C */