Implements flow callbacks and alerts in C++

scripts/lua/modules/alert_definitions/alert_elephant_flow.lua

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+--
+-- (C) 2019-21 - ntop.org
+--
+--
+-- (C) 2019-21 - ntop.org
+--
+
+-- ##############################################
+
+local alert_keys = require "alert_keys"
+-- Import the classes library.
+local classes = require "classes"
+-- Make sure to import the Superclass!
+local alert = require "alert"
+
+-- ##############################################
+
+local alert_elephant_flow = classes.class(alert)
+
+-- ##############################################
+
+alert_elephant_flow.meta = {
+   alert_key = alert_keys.ntopng.alert_elephant_flow,
+   i18n_title = "flow_details.elephant_flow",
+   icon = "fas fa-exclamation",
+}
+
+-- #######################################################
+
+-- @brief Prepare an alert table used to generate the alert
+-- @param l2r_threshold Local-to-Remote threshold, in bytes, for a flow to be considered an elephant
+-- @param r2l_threshold Remote-to-Local threshold, in bytes, for a flow to be considered an elephant
+-- @return A table with the alert built
+function alert_elephant_flow:init()
+   -- Call the parent constructor
+   self.super:init()
+end
+
+-- #######################################################
+
+-- @brief Format an alert into a human-readable string
+-- @param ifid The integer interface id of the generated alert
+-- @param alert The alert description table, including alert data such as the generating entity, timestamp, granularity, type
+-- @param alert_type_params Table `alert_type_params` as built in the `:init` method
+-- @return A human-readable string
+function alert_elephant_flow.format(ifid, alert, alert_type_params)
+   return formatElephantAlertType(alert_type_params)
+end
+
+-- #######################################################
+
+return alert_elephant_flow
+
+-- #######################################################