xref: /third_party/mbedtls/library/mps_trace.c (revision a8e1175b) 
1/*
2 *  Message Processing Stack, Trace module
3 *
4 *  Copyright The Mbed TLS Contributors
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#include "common.h"
23
24#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
25
26#include "mps_common.h"
27
28#if defined(MBEDTLS_MPS_ENABLE_TRACE)
29
30#include "mps_trace.h"
31#include <stdarg.h>
32
33static int trace_depth = 0;
34
35#define color_default  "\x1B[0m"
36#define color_red      "\x1B[1;31m"
37#define color_green    "\x1B[1;32m"
38#define color_yellow   "\x1B[1;33m"
39#define color_blue     "\x1B[1;34m"
40#define color_magenta  "\x1B[1;35m"
41#define color_cyan     "\x1B[1;36m"
42#define color_white    "\x1B[1;37m"
43
44static char const *colors[] =
45{
46    color_default,
47    color_green,
48    color_yellow,
49    color_magenta,
50    color_cyan,
51    color_blue,
52    color_white
53};
54
55#define MPS_TRACE_BUF_SIZE 100
56
57void mbedtls_mps_trace_print_msg(int id, int line, const char *format, ...)
58{
59    int ret;
60    char str[MPS_TRACE_BUF_SIZE];
61    va_list argp;
62    va_start(argp, format);
63    ret = mbedtls_vsnprintf(str, MPS_TRACE_BUF_SIZE, format, argp);
64    va_end(argp);
65
66    if (ret >= 0 && ret < MPS_TRACE_BUF_SIZE) {
67        str[ret] = '\0';
68        mbedtls_printf("[%d|L%d]: %s\n", id, line, str);
69    }
70}
71
72int mbedtls_mps_trace_get_depth()
73{
74    return trace_depth;
75}
76void mbedtls_mps_trace_dec_depth()
77{
78    trace_depth--;
79}
80void mbedtls_mps_trace_inc_depth()
81{
82    trace_depth++;
83}
84
85void mbedtls_mps_trace_color(int id)
86{
87    if (id > (int) (sizeof(colors) / sizeof(*colors))) {
88        return;
89    }
90    printf("%s", colors[id]);
91}
92
93void mbedtls_mps_trace_indent(int level, mbedtls_mps_trace_type ty)
94{
95    if (level > 0) {
96        while (--level) {
97            printf("|  ");
98        }
99
100        printf("|  ");
101    }
102
103    switch (ty) {
104        case MBEDTLS_MPS_TRACE_TYPE_COMMENT:
105            mbedtls_printf("@ ");
106            break;
107
108        case MBEDTLS_MPS_TRACE_TYPE_CALL:
109            mbedtls_printf("+--> ");
110            break;
111
112        case MBEDTLS_MPS_TRACE_TYPE_ERROR:
113            mbedtls_printf("E ");
114            break;
115
116        case MBEDTLS_MPS_TRACE_TYPE_RETURN:
117            mbedtls_printf("< ");
118            break;
119
120        default:
121            break;
122    }
123}
124
125#endif /* MBEDTLS_MPS_ENABLE_TRACE */
126#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
127