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--
-- (C) 2019-22 - ntop.org
--
-- ##############################################
local host_alert_keys = require "host_alert_keys"
local alert_creators = require "alert_creators"
local json = require("dkjson")
-- Import the classes library.
local classes = require "classes"
-- Make sure to import the Superclass!
local alert = require "alert"
-- ##############################################
local host_alert_ntp_server_contacts = classes.class(alert)
-- ##############################################
host_alert_ntp_server_contacts.meta = {
alert_key = host_alert_keys.host_alert_ntp_server_contacts,
i18n_title = "alerts_dashboard.host_alert_ntp_server_contacts",
icon = "fas fa-fw fa-life-ring",
has_victim = true,
}
-- ##############################################
-- @brief Prepare an alert table used to generate the alert
-- @param one_param The first alert param
-- @param another_param The second alert param
-- @return A table with the alert built
function host_alert_ntp_server_contacts:init(metric, value, operator, threshold)
-- Call the parent constructor
self.super:init()
self.alert_type_params = alert_creators.createThresholdCross(metric, value, operator, threshold)
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 host_alert_ntp_server_contacts.format(ifid, alert, alert_type_params)
local alert_consts = require("alert_consts")
local entity = alert_consts.formatHostAlert(ifid, alert["ip"], alert["vlan_id"])
local value = alert_type_params.value
if(value == nil) then value = 0 end
return i18n("alert_messages.host_alert_ntp_server_contacts", {
entity = entity,
value = string.format("%u", math.ceil(value or 0)),
threshold = alert_type_params.threshold or 0,
})
end
-- #######################################################
-- @brief Prepare a table containing a set of filters useful to query historical flows that contributed to the generation of this alert
-- @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 host_alert_ntp_server_contacts.filter_to_past_flows(ifid, alert, alert_type_params)
local res = {}
local host_key = hostinfo2hostkey({ip = alert["ip"], vlan = alert["vlan_id"]})
-- Look for the IP as client as the alert is about too many contacted SERVERs
res["cli_ip"] = host_key
res["l7proto"] = "NTP"
return res
end
-- #######################################################
return host_alert_ntp_server_contacts
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