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63 lines
2.7 KiB
Lua
63 lines
2.7 KiB
Lua
--
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-- (C) 2019-22 - ntop.org
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--
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-- ##############################################
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local flow_alert_keys = require "flow_alert_keys"
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-- Import the classes library.
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local classes = require "classes"
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-- Make sure to import the Superclass!
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local alert = require "alert"
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-- ##############################################
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local alert_tcp_packets_issues = classes.class(alert)
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-- ##############################################
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alert_tcp_packets_issues.meta = {
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alert_key = flow_alert_keys.flow_alert_tcp_packets_issues,
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i18n_title = "flow_checks_config.tcp_packets_issues",
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icon = "fas fa-fw fa-exclamation",
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}
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-- ##############################################
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-- @brief Prepare an alert table used to generate the alert
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-- @param tcp_stats A lua table with TCP stats obtained with flow.getTCPStats
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-- @param cli2srv_pkts Number of packets sent from the client to the server
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-- @param srv2cli_pkts Number of packets sent from the server to the client
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-- @param is_severe A boolean indicating whether connection issues are severe
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-- @param client_issues A boolean indicating if the client has connection issues
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-- @param server_issues A boolean indicating if the server has connection issues
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-- @return A table with the alert built
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function alert_tcp_packets_issues:init()
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-- Call the parent constructor
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self.super:init()
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end
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-- #######################################################
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-- @brief Format an alert into a human-readable string
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-- @param ifid The integer interface id of the generated alert
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-- @param alert The alert description table, including alert data such as the generating entity, timestamp, granularity, type
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-- @param alert_type_params Table `alert_type_params` as built in the `:init` method
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-- @return A human-readable string
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function alert_tcp_packets_issues.format(ifid, alert, alert_type_params)
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local msg = ''
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if alert_type_params.lost > alert_type_params.lost_threshold then
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msg = i18n("flow_checks_config.tcp_packets_issues_alert", { type = 'loss', value = alert_type_params.lost, threshold = alert_type_params.lost_threshold })
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elseif alert_type_params.retransmission > alert_type_params.retransmission_threshold then
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msg = i18n("flow_checks_config.tcp_packets_issues_alert", { type = 'retransmission', value = alert_type_params.retransmission, threshold = alert_type_params.retransmission_threshold })
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elseif alert_type_params.out_of_order > alert_type_params.out_of_order_threshold then
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msg = i18n("flow_checks_config.tcp_packets_issues_alert", { type = 'out of order', value = alert_type_params.out_of_order, threshold = alert_type_params.out_of_order_threshold })
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end
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return msg
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end
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-- #######################################################
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return alert_tcp_packets_issues
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