Add VLAN bidirectional traffic alert (#7126) (#7194)

* Add VLAN bidirectional traffic alert (#7126)

* Add alert description. (#7126)

scripts/lua/modules/alert_definitions/flow/alert_vlan_bidirectional_traffic.lua

@@ -0,0 +1,59 @@
+--
+-- (C) 2019-22 - ntop.org
+--
+
+-- ##############################################
+
+local flow_alert_keys = require "flow_alert_keys"
+-- Import the classes library.
+local classes = require "classes"
+-- Make sure to import the Superclass!
+local alert = require "alert"
+
+local format_utils = require "format_utils"
+
+-- ##############################################
+
+local alert_vlan_bidirectional_traffic = classes.class(alert)
+
+-- ##############################################
+
+alert_vlan_bidirectional_traffic.meta = {
+   alert_key = flow_alert_keys.flow_alert_vlan_bidirectional_traffic,
+   i18n_title = "alerts_dashboard.vlan_bidirectional_traffic",
+   icon = "fas fa-fw fa-exclamation",
+}
+
+-- ##############################################
+
+-- @brief Prepare an alert table used to generate the alert
+-- @param one_flow_param The first alert param
+-- @param another_flow_param The second alert param
+-- @return A table with the alert built
+function alert_vlan_bidirectional_traffic:init()
+   -- Call the parent constructor
+   self.super:init()
+end
+
+-- #######################################################
+
+function alert_vlan_bidirectional_traffic.format(ifid, alert, alert_type_params)
+   local vlan_id = alert["vlan_id"]
+   local tx = format_utils.bytesToSize(alert["cli2srv_bytes"])
+   local rx = format_utils.bytesToSize(alert["srv2cli_bytes"])
+
+   return i18n("alert_messages.vlan_bidirectional_traffic",{
+      vlan = vlan_id,
+      tx = tx,
+      rx = rx
+   })
+
+end
+
+-- #######################################################
+
+return alert_vlan_bidirectional_traffic
+
+
+--
+-- (C) 2019-20 - ntop.