mirror of
https://github.com/ntop/ntopng.git
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90 lines
3.5 KiB
C++
90 lines
3.5 KiB
C++
/*
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*
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* (C) 2019-26 - 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 _OTHER_ALERTABLE_ENTITY_H_
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#define _OTHER_ALERTABLE_ENTITY_H_
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#include "ntop_includes.h"
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class NetworkInterface;
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class OtherAlertableEntity : public AlertableEntity {
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private:
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protected:
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/*
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Creating multiple maps guarantees that periodic scripts at different
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granularities do not interfere each other and thus that they can run
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concurrently without locking.
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However while alert_cache is accessed only by the alert engine and thus it
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is "thread-safe" as concurrent scripts (i.e. at different granularities)
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cannot call it, engaged_alerts needs to be protected as
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- it can be called by the Lua GUI
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- it can be called by the alert engine
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In order to save memory, the std::map key is a hash 32 bit and not the
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original string. Considered the number of entries this is a good
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tradeoff with no false positives considered the limited value
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cardinality.
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*/
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std::map<u_int32_t /* std::string */, std::string>
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alert_cache[MAX_NUM_PERIODIC_SCRIPTS];
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std::map<u_int32_t /* std::string */, Alert>
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engaged_alerts[MAX_NUM_PERIODIC_SCRIPTS];
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void getAlertsByPeriodicity(lua_State* vm, ScriptPeriodicity p,
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AlertType type_filter, AlertLevel severity_filter,
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AlertRole role_filter, u_int* idx);
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public:
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OtherAlertableEntity(NetworkInterface* alert_iface, AlertEntity entity);
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virtual ~OtherAlertableEntity();
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/*
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getAlertCachedValue and setAlertCacheValue as thread safe as they are
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invoked only by periodic scripts and are not accessed by the GUI lua methods
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*/
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inline std::string getAlertCachedValue(std::string key, ScriptPeriodicity p) {
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std::map<u_int32_t /* std::string */, std::string>::iterator it =
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alert_cache[(u_int)p].find(ndpi_hash_string(key.c_str()));
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return ((it != alert_cache[(u_int)p].end()) ? it->second : std::string(""));
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}
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inline void setAlertCacheValue(std::string key, std::string value,
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ScriptPeriodicity p) {
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alert_cache[(u_int)p][ndpi_hash_string(key.c_str())] = value;
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}
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bool triggerAlert(lua_State* vm, std::string key, ScriptPeriodicity p,
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time_t now, u_int32_t score, AlertType alert_id,
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const char* subtype, const char* json, const char* ip,
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const char* name, u_int16_t port);
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bool releaseAlert(lua_State* vm, std::string key, ScriptPeriodicity p,
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time_t now);
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void luaAlert(lua_State* vm, const Alert* alert, ScriptPeriodicity p) const;
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void countAlerts(grouped_alerts_counters* counters);
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void getAlerts(lua_State* vm, ScriptPeriodicity p, AlertType type_filter,
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AlertLevel severity_filter, AlertRole role_filter, u_int* idx);
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};
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#endif
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