/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2016 Red Hat, Inc.
 */

#ifndef __NM_LOGGING_SYSLOG_H__
#define __NM_LOGGING_SYSLOG_H__

#include <syslog.h>

static inline int
nm_utils_syslog_coerce_from_nm(int syslog_level)
{
    /* NetworkManager uses internally NMLogLevel levels. When spawning
     * the VPN plugin, it maps those levels to syslog levels as follows:
     *
     *  LOGL_INFO = LOG_NOTICE,
     *  LOGL_DEBUG = LOG_INFO,
     *  LOGL_TRACE = LOG_DEBUG,
     *
     * However, when actually printing to syslog, we don't want to print messages
     * with LOGL_INFO level as LOG_NOTICE, because they are *not* to be highlighted.
     *
     * In other words: NetworkManager has 3 levels that should not require highlighting:
     * LOGL_INFO, LOGL_DEBUG, LOGL_TRACE. syslog on the other hand has only LOG_INFO and LOG_DEBUG.
     *
     * So, coerce those values before printing to syslog. When you receive the syslog_level
     * from NetworkManager, instead of calling
     *   syslog(syslog_level, ...)
     * you should call
     *   syslog(nm_utils_syslog_coerce_from_nm(syslog_level), ...)
     */
    switch (syslog_level) {
    case LOG_INFO:
        return LOG_DEBUG;
    case LOG_NOTICE:
        return LOG_INFO;
    default:
        return syslog_level;
    }
}

static inline const char *
nm_utils_syslog_to_str(int syslog_level)
{
    /* Maps the levels the same way as NetworkManager's nm-logging.c does */
    if (syslog_level >= LOG_DEBUG)
        return "<trace>";
    if (syslog_level >= LOG_INFO)
        return "<debug>";
    if (syslog_level >= LOG_NOTICE)
        return "<info>";
    if (syslog_level >= LOG_WARNING)
        return "<warn>";
    return "<error>";
}

/*****************************************************************************/

#endif /* __NM_LOGGING_SYSLOG_H__ */
