library/mps_trace.c

/*
 *  Message Processing Stack, Trace module
 *
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *  This file is part of Mbed TLS (https://tls.mbed.org)
 */

#include "common.h"

#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)

#    include "mps_common.h"

#    if defined(MBEDTLS_MPS_ENABLE_TRACE)

#        include "mps_trace.h"
#        include <stdarg.h>

static int trace_depth = 0;

#        define color_default "\x1B[0m"
#        define color_red     "\x1B[1;31m"
#        define color_green   "\x1B[1;32m"
#        define color_yellow  "\x1B[1;33m"
#        define color_blue    "\x1B[1;34m"
#        define color_magenta "\x1B[1;35m"
#        define color_cyan    "\x1B[1;36m"
#        define color_white   "\x1B[1;37m"

static char const *colors[] = { color_default, color_green, color_yellow,
                                color_magenta, color_cyan,  color_blue,
                                color_white };

#        define MPS_TRACE_BUF_SIZE 100

void mbedtls_mps_trace_print_msg(int id, int line, const char *format, ...)
{
    int ret;
    char str[MPS_TRACE_BUF_SIZE];
    va_list argp;
    va_start(argp, format);
    ret = mbedtls_vsnprintf(str, MPS_TRACE_BUF_SIZE, format, argp);
    va_end(argp);

    if (ret >= 0 && ret < MPS_TRACE_BUF_SIZE) {
        str[ret] = '\0';
        mbedtls_printf("[%d|L%d]: %s\n", id, line, str);
    }
}

int mbedtls_mps_trace_get_depth()
{
    return trace_depth;
}
void mbedtls_mps_trace_dec_depth()
{
    trace_depth--;
}
void mbedtls_mps_trace_inc_depth()
{
    trace_depth++;
}

void mbedtls_mps_trace_color(int id)
{
    if (id > (int)(sizeof(colors) / sizeof(*colors)))
        return;
    printf("%s", colors[id]);
}

void mbedtls_mps_trace_indent(int level, mbedtls_mps_trace_type ty)
{
    if (level > 0) {
        while (--level)
            printf("|  ");

        printf("|  ");
    }

    switch (ty) {
        case MBEDTLS_MPS_TRACE_TYPE_COMMENT:
            mbedtls_printf("@ ");
            break;

        case MBEDTLS_MPS_TRACE_TYPE_CALL:
            mbedtls_printf("+--> ");
            break;

        case MBEDTLS_MPS_TRACE_TYPE_ERROR:
            mbedtls_printf("E ");
            break;

        case MBEDTLS_MPS_TRACE_TYPE_RETURN:
            mbedtls_printf("< ");
            break;

        default:
            break;
    }
}

#    endif /* MBEDTLS_MPS_ENABLE_TRACE */
#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */