mirror of
https://github.com/ntop/ntopng.git
synced 2026-05-20 17:29:13 +00:00
145 lines
4.1 KiB
C++
145 lines
4.1 KiB
C++
/*
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*
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* (C) 2013-23 - 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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#include "ntop_includes.h"
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#include "flow_checks_includes.h"
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/* ***************************************************** */
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CustomFlowLuaScript::CustomFlowLuaScript() : FlowCheck(ntopng_edition_community,
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false /* All interfaces */,
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false /* Don't exclude for nEdge */,
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false /* NOT only for nEdge */,
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true /* has_protocol_detected */,
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false /* has_periodic_update */,
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false /* has_flow_end */) {
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disabled = false;
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}
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/* ***************************************************** */
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LuaEngine* CustomFlowLuaScript::initVM() {
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const char *script_path = "scripts/callbacks/checks/flows/custom_flow_lua_script.lua";
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char where[256];
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struct stat s;
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snprintf(where, sizeof(where), "%s/%s", ntop->get_install_dir(), script_path);
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if(stat(where, &s) != 0) {
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if(!disabled) {
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ntop->getTrace()->traceEvent(TRACE_NORMAL, "Unable to find script %s: ignored `Flow User Check Script` flow check", where);
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disabled = true;
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}
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return(NULL);
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} else {
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LuaEngine *lua;
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try {
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lua = new LuaEngine(NULL);
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lua->load_script((char*)where, NULL /* NetworkInterface filled later via lua->setFlow(f); */);
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ntop->getTrace()->traceEvent(TRACE_NORMAL, "Loaded custom user script %s", where);
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} catch(std::bad_alloc& ba) {
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ntop->getTrace()->traceEvent(TRACE_ERROR, "Unable to start Lua interpreter.");
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}
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return(lua);
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}
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}
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/* ***************************************************** */
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CustomFlowLuaScript::~CustomFlowLuaScript() {
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}
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/* ***************************************************** */
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void CustomFlowLuaScript::protocolDetected(Flow *f) {
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LuaEngine *lua;
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if(!f)
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return;
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else {
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lua = f->getInterface()->getCustomFlowLuaScript();
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if(lua == NULL) {
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lua = initVM();
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f->getInterface()->setCustomFlowLuaScript(lua);
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}
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}
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if(lua != NULL) {
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if(false) {
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char buf[128];
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ntop->getTrace()->traceEvent(TRACE_NORMAL, "Running Lua script on %s", f->print(buf, sizeof(buf)));
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}
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lua->setFlow(f);
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lua->run_loaded_script(); /* Run script */
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if(f->isCustomFlowAlertTriggered()) {
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FlowAlertType alert_type = CustomFlowLuaScriptAlert::getClassType();
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u_int8_t c_score, s_score;
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risk_percentage cli_score_pctg = CLIENT_FAIR_RISK_PERCENTAGE;
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computeCliSrvScore(alert_type, cli_score_pctg, &c_score, &s_score);
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f->triggerAlertAsync(alert_type, c_score, s_score);
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}
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}
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}
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/* ***************************************************** */
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FlowAlert *CustomFlowLuaScript::buildAlert(Flow *f) {
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CustomFlowLuaScriptAlert *alert = new CustomFlowLuaScriptAlert(this, f);
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alert->setAlertMessage(f->getCustomFlowAlertMessage());
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alert->setAlertScore(f->getCustomFlowAlertScore());
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return alert;
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}
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/* ***************************************************** */
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/* Sample configuration:
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"script_conf": {
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"severity": {
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"syslog_severity": 3,
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"severity_id": 5,
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"i18n_title": "alerts_dashboard.error",
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"emoji": "❗",
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"icon": "fas fa-exclamation-triangle text-danger",
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"label": "badge-danger"
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}
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}
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*/
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bool CustomFlowLuaScript::loadConfiguration(json_object *config) {
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FlowCheck::loadConfiguration(config); /* Parse parameters in common */
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/* Parse additional parameters */
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return(true);
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}
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/* ***************************************************** */
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