Trace.cpp

/*
 *
 * (C) 2021-24 - ntop.org 
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */

#include "include.h"

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

Trace::Trace() {
  traceLevel = TRACE_LEVEL_NORMAL;
  syslogOnly = false;
};

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

Trace::~Trace() {
};

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

void Trace::set_trace_level(u_int8_t id) {
  if(id > MAX_TRACE_LEVEL) id = MAX_TRACE_LEVEL;

  traceLevel = id;
}

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

void Trace::traceEvent(int eventTraceLevel, const char* _file,
		       const int line, const char * format, ...) {
  if((eventTraceLevel <= traceLevel) && (traceLevel > 0)) {
    va_list va_ap;
    char buf[3000], out_buf[8192];
    char theDate[32], *file = (char*)_file;
    const char *extra_msg = "";
    time_t theTime = time(NULL);
    char filebuf[PATH_MAX];
    const char *backslash = strrchr(_file, '/');
    struct tm result;

    if(backslash != NULL) {
      snprintf(filebuf, sizeof(filebuf), "%s", &backslash[1]);
      file = (char*)filebuf;
    }

    va_start (va_ap, format);

    /* We have two paths - one if we're logging, one if we aren't
     *   Note that the no-log case is those systems which don't support it (WIN32),
     *                                those without the headers !defined(USE_SYSLOG)
     *                                those where it's parametrically off...
     */

    memset(buf, 0, sizeof(buf));
    strftime(theDate, 32, "%d/%b/%Y %H:%M:%S", localtime_r(&theTime, &result));

    vsnprintf(buf, sizeof(buf)-1, format, va_ap);

    if(eventTraceLevel == 0 /* TRACE_ERROR */)
      extra_msg = "ERROR: ";
    else if(eventTraceLevel == 1 /* TRACE_WARNING */)
      extra_msg = "WARNING: ";

    while(buf[strlen(buf)-1] == '\n') buf[strlen(buf)-1] = '\0';

    if(!syslogOnly) {
      snprintf(out_buf, sizeof(out_buf), "%s [%s:%d] %s%s", theDate, file, line, extra_msg, buf);
      printf("%s\n", out_buf);
      fflush(stdout);
    } else {
      snprintf(out_buf, sizeof(out_buf), "%s%s", extra_msg, buf);

      if(eventTraceLevel == 0 /* TRACE_ERROR */)
	syslog(LOG_ERR, "%s", out_buf);
      else if(eventTraceLevel == 1 /* TRACE_WARNING */)
	syslog(LOG_WARNING, "%s", out_buf);
      else if(eventTraceLevel == 2 /* TRACE_NORMAL */)
	syslog(LOG_NOTICE, "%s", out_buf);
    }

    va_end(va_ap);
  }
}

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