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62 lines
2.4 KiB
C++
62 lines
2.4 KiB
C++
/*
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*
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* (C) 2013-17 - ntop.org
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#ifndef _ALERT_COUNTER_H_
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#define _ALERT_COUNTER_H_
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#include "ntop_includes.h"
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/** @class AlertCounter
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* @brief Base class for alerts.
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* @details Defines a basic class for handling generated alerts.
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*
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* @ingroup MonitoringData
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*
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*/
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class AlertCounter {
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private:
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bool thresholdTrepassed;
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u_int32_t max_num_hits_sec; /**< Threshold above which we trigger an alert. */
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u_int32_t num_hits_since_first_alert; /**< Number of hits since the first one that contributed to generate an alert. */
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u_int8_t over_threshold_duration_sec; /**< Consecutive duration of threshold trespassing before triggering an alert. */
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time_t time_last_hit; /**< Time of last hit received. */
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time_t time_last_alert_reported; /**< Time of last alert issued. */
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time_t last_trespassed_threshold; /**< Time of last event that trespassed the threshold. */
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u_int32_t num_trespassed_threshold; /**< Number of consecutives threshold trespassing. */
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u_int32_t num_hits_rcvd_last_second; /**< Number of hits reported in the last second. */
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u_int32_t last_trespassed_hits; /**< Number of hits during last threshold trespassing */
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void init();
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public:
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AlertCounter(u_int32_t _max_num_hits_sec,
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u_int8_t _over_threshold_duration_sec);
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bool incHits(time_t when);
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inline u_int32_t getCurrentHits() { return(num_hits_since_first_alert); };
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inline u_int8_t getOverThresholdDuration() { return(over_threshold_duration_sec); };
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inline bool isAboveThreshold(time_t when) { return(thresholdTrepassed && (time_last_hit >= (when-1)) ); };
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void resetThresholds(u_int32_t _max_num_hits_sec, u_int8_t _over_threshold_duration_sec);
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void lua(lua_State* vm, const char *table_key);
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};
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#endif /* _ALERT_COUNTER_H_ */
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