1 /*
2 * Portable interface to the CPU cycle counter
3 *
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: Apache-2.0
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
8 * not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 * This file is part of mbed TLS (https://tls.mbed.org)
20 */
21
22 /*
23 * mbedtls_timing_get_timer()m mbedtls_timing_set_delay() and
24 * mbedtls_timing_set_delay only abstracted from mbedtls/library/timing.c
25 * as that does not build on ESP-IDF but these 2 functions are needed for
26 * DTLS (in particular mbedtls_ssl_set_timer_cb() must be called for DTLS
27 * which requires these 2 delay functions).
28 */
29
30 #if !defined(MBEDTLS_CONFIG_FILE)
31 #include "mbedtls/config.h"
32 #else
33 #include MBEDTLS_CONFIG_FILE
34 #endif
35
36 #if !defined(MBEDTLS_ESP_TIMING_C)
37
38 #include <sys/time.h>
39 #include "mbedtls/timing.h"
40
41 struct _hr_time
42 {
43 struct timeval start;
44 };
45
mbedtls_timing_get_timer(struct mbedtls_timing_hr_time * val,int reset)46 unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset )
47 {
48 struct _hr_time *t = (struct _hr_time *) val;
49
50 if( reset )
51 {
52 gettimeofday( &t->start, NULL );
53 return( 0 );
54 }
55 else
56 {
57 unsigned long delta;
58 struct timeval now;
59 gettimeofday( &now, NULL );
60 delta = ( now.tv_sec - t->start.tv_sec ) * 1000ul
61 + ( now.tv_usec - t->start.tv_usec ) / 1000;
62 return( delta );
63 }
64 }
65
66 /*
67 * Set delays to watch
68 */
mbedtls_timing_set_delay(void * data,uint32_t int_ms,uint32_t fin_ms)69 void mbedtls_timing_set_delay( void *data, uint32_t int_ms, uint32_t fin_ms )
70 {
71 mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
72
73 ctx->int_ms = int_ms;
74 ctx->fin_ms = fin_ms;
75
76 if( fin_ms != 0 )
77 (void) mbedtls_timing_get_timer( &ctx->timer, 1 );
78 }
79
80 /*
81 * Get number of delays expired
82 */
mbedtls_timing_get_delay(void * data)83 int mbedtls_timing_get_delay( void *data )
84 {
85 mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
86 unsigned long elapsed_ms;
87
88 if( ctx->fin_ms == 0 )
89 return( -1 );
90
91 elapsed_ms = mbedtls_timing_get_timer( &ctx->timer, 0 );
92
93 if( elapsed_ms >= ctx->fin_ms )
94 return( 2 );
95
96 if( elapsed_ms >= ctx->int_ms )
97 return( 1 );
98
99 return( 0 );
100 }
101
102 #endif /* MBEDTLS_ESP_TIMING_C */
103
