/* logging.h
 *
 * Copyright (C) 2006-2019 wolfSSL Inc.
 *
 * This file is part of wolfSSL.
 *
 * wolfSSL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * wolfSSL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
 */

/*!
    \file wolfssl/wolfcrypt/logging.h
*/


/* submitted by eof */


#ifndef WOLFSSL_LOGGING_H
#define WOLFSSL_LOGGING_H

#include <libwolfssl/wolfcrypt/types.h>

#ifdef __cplusplus
    extern "C" {
#endif


enum wc_LogLevels {
    ERROR_LOG = 0,
    INFO_LOG,
    ENTER_LOG,
    LEAVE_LOG,
    OTHER_LOG
};

#ifdef WOLFSSL_FUNC_TIME
/* WARNING: This code is only to be used for debugging performance.
 *          The code is not thread-safe.
 *          Do not use WOLFSSL_FUNC_TIME in production code.
 */
enum wc_FuncNum {
    WC_FUNC_HELLO_REQUEST_SEND = 0,
    WC_FUNC_HELLO_REQUEST_DO,
    WC_FUNC_CLIENT_HELLO_SEND,
    WC_FUNC_CLIENT_HELLO_DO,
    WC_FUNC_SERVER_HELLO_SEND,
    WC_FUNC_SERVER_HELLO_DO,
    WC_FUNC_ENCRYPTED_EXTENSIONS_SEND,
    WC_FUNC_ENCRYPTED_EXTENSIONS_DO,
    WC_FUNC_CERTIFICATE_REQUEST_SEND,
    WC_FUNC_CERTIFICATE_REQUEST_DO,
    WC_FUNC_CERTIFICATE_SEND,
    WC_FUNC_CERTIFICATE_DO,
    WC_FUNC_CERTIFICATE_VERIFY_SEND,
    WC_FUNC_CERTIFICATE_VERIFY_DO,
    WC_FUNC_FINISHED_SEND,
    WC_FUNC_FINISHED_DO,
    WC_FUNC_KEY_UPDATE_SEND,
    WC_FUNC_KEY_UPDATE_DO,
    WC_FUNC_EARLY_DATA_SEND,
    WC_FUNC_EARLY_DATA_DO,
    WC_FUNC_NEW_SESSION_TICKET_SEND,
    WC_FUNC_NEW_SESSION_TICKET_DO,
    WC_FUNC_SERVER_HELLO_DONE_SEND,
    WC_FUNC_SERVER_HELLO_DONE_DO,
    WC_FUNC_TICKET_SEND,
    WC_FUNC_TICKET_DO,
    WC_FUNC_CLIENT_KEY_EXCHANGE_SEND,
    WC_FUNC_CLIENT_KEY_EXCHANGE_DO,
    WC_FUNC_CERTIFICATE_STATUS_SEND,
    WC_FUNC_CERTIFICATE_STATUS_DO,
    WC_FUNC_SERVER_KEY_EXCHANGE_SEND,
    WC_FUNC_SERVER_KEY_EXCHANGE_DO,
    WC_FUNC_END_OF_EARLY_DATA_SEND,
    WC_FUNC_END_OF_EARLY_DATA_DO,
    WC_FUNC_COUNT
};
#endif

typedef void (*wolfSSL_Logging_cb)(const int logLevel,
                                   const char *const logMessage);

WOLFSSL_API int wolfSSL_SetLoggingCb(wolfSSL_Logging_cb log_function);

/* turn logging on, only if compiled in */
WOLFSSL_API int  wolfSSL_Debugging_ON(void);
/* turn logging off */
WOLFSSL_API void wolfSSL_Debugging_OFF(void);


#if defined(OPENSSL_EXTRA) || defined(DEBUG_WOLFSSL_VERBOSE)
    WOLFSSL_LOCAL int wc_LoggingInit(void);
    WOLFSSL_LOCAL int wc_LoggingCleanup(void);
    WOLFSSL_LOCAL int wc_AddErrorNode(int error, int line, char* buf,
            char* file);
    WOLFSSL_LOCAL int wc_PeekErrorNode(int index, const char **file,
            const char **reason, int *line);
    WOLFSSL_LOCAL void wc_RemoveErrorNode(int index);
    WOLFSSL_LOCAL void wc_ClearErrorNodes(void);
    WOLFSSL_LOCAL int wc_PullErrorNode(const char **file, const char **reason,
                            int *line);
    WOLFSSL_API   int wc_SetLoggingHeap(void* h);
    WOLFSSL_API   int wc_ERR_remove_state(void);
    #if !defined(NO_FILESYSTEM) && !defined(NO_STDIO_FILESYSTEM)
        WOLFSSL_API   void wc_ERR_print_errors_fp(XFILE fp);
    #endif
#endif /* OPENSSL_EXTRA || DEBUG_WOLFSSL_VERBOSE */

#ifdef WOLFSSL_FUNC_TIME
    /* WARNING: This code is only to be used for debugging performance.
     *          The code is not thread-safe.
     *          Do not use WOLFSSL_FUNC_TIME in production code.
     */
    WOLFSSL_API void WOLFSSL_START(int funcNum);
    WOLFSSL_API void WOLFSSL_END(int funcNum);
    WOLFSSL_API void WOLFSSL_TIME(int count);
#else
    #define WOLFSSL_START(n)
    #define WOLFSSL_END(n)
    #define WOLFSSL_TIME(n)
#endif

#if defined(DEBUG_WOLFSSL) && !defined(WOLFSSL_DEBUG_ERRORS_ONLY)
    #if defined(_WIN32)
        #if defined(INTIME_RTOS)
            #define __func__ NULL
        #else
            #define __func__ __FUNCTION__
        #endif
    #endif

    /* a is prepended to m and b is appended, creating a log msg a + m + b */
    #define WOLFSSL_LOG_CAT(a, m, b) #a " " m " "  #b

    WOLFSSL_API void WOLFSSL_ENTER(const char* msg);
    WOLFSSL_API void WOLFSSL_LEAVE(const char* msg, int ret);
    #define WOLFSSL_STUB(m) \
        WOLFSSL_MSG(WOLFSSL_LOG_CAT(wolfSSL Stub, m, not implemented))

    WOLFSSL_API void WOLFSSL_MSG(const char* msg);
    WOLFSSL_API void WOLFSSL_BUFFER(const byte* buffer, word32 length);

#else

    #define WOLFSSL_ENTER(m)
    #define WOLFSSL_LEAVE(m, r)
    #define WOLFSSL_STUB(m)

    #define WOLFSSL_MSG(m)
    #define WOLFSSL_BUFFER(b, l)

#endif /* DEBUG_WOLFSSL && !WOLFSSL_DEBUG_ERRORS_ONLY */

#if defined(DEBUG_WOLFSSL) || defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) ||\
    defined(WOLFSSL_HAPROXY) || defined(OPENSSL_EXTRA)

    #if (defined(OPENSSL_EXTRA) && !defined(_WIN32)) || defined(DEBUG_WOLFSSL_VERBOSE)
        WOLFSSL_API void WOLFSSL_ERROR_LINE(int err, const char* func, unsigned int line,
            const char* file, void* ctx);
        #define WOLFSSL_ERROR(x) \
            WOLFSSL_ERROR_LINE((x), __func__, __LINE__, __FILE__, NULL)
    #else
        WOLFSSL_API void WOLFSSL_ERROR(int err);
    #endif
    WOLFSSL_API void WOLFSSL_ERROR_MSG(const char* msg);

#else
    #define WOLFSSL_ERROR(e)
    #define WOLFSSL_ERROR_MSG(m)
#endif

#ifdef __cplusplus
}
#endif
#endif /* WOLFSSL_LOGGING_H */