EVOLUTION-MANAGER

Edit File: network.lua

--
-- (C) 2019-20 - ntop.org
--

local dirs = ntop.getDirs()
package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
require "lua_utils"
require "alert_utils"

local alerts_api = require("alerts_api")
local user_scripts = require("user_scripts")
local alert_consts = require("alert_consts")

local do_benchmark = true          -- Compute benchmarks and store their results
local do_print_benchmark = false   -- Print benchmarks results to standard output
local do_trace = false             -- Trace lua calls

local available_modules = nil
local ifid = nil
local network_entity = alert_consts.alert_entities.network.entity_id
local configsets = nil
local confset_id = nil

-- The function below ia called once (#pragma once)
function setup(str_granularity)
   if do_trace then print("alert.lua:setup("..str_granularity..") called\n") end
   ifid = interface.getId()
   local ifname = interface.setActiveInterfaceId(ifid)

-- Load the threshold checking functions
   available_modules = user_scripts.load(ifid, user_scripts.script_types.traffic_element, "network", {
      hook_filter = str_granularity,
      do_benchmark = do_benchmark,
   })

configsets = user_scripts.getConfigsets()
end

-- #################################################################

-- The function below ia called once (#pragma once)
function teardown(str_granularity)
   if(do_trace) then print("alert.lua:teardown("..str_granularity..") called\n") end

user_scripts.teardown(available_modules, do_benchmark, do_print_benchmark)
end

-- #################################################################

-- The function below is called once per local network
function runScripts(granularity)
   if table.empty(available_modules.hooks[granularity]) then
      if(do_trace) then print("network:runScripts("..granularity.."): no modules, skipping\n") end
      return
   end

local info = network.getNetworkStats()
   local network_key = info and info.network_key
   if not network_key then return end

local granularity_id = alert_consts.alerts_granularities[granularity].granularity_id
   local suppressed_alerts = alerts_api.hasSuppressedAlerts(ifid, network_entity, network_key)

if suppressed_alerts then
      releaseAlerts(granularity_id)
   end

local cur_alerts = network.getAlerts(granularity_id)
   local entity_info = alerts_api.networkAlertEntity(network_key)
   local subnet_conf = user_scripts.getTargetConfig(configsets, "network", network_key)

for mod_key, hook_fn in pairs(available_modules.hooks[granularity]) do
      local user_script = available_modules.modules[mod_key]
      local conf, confset_id = user_scripts.getTargetHookConfig(subnet_conf, user_script, granularity)

if(conf.enabled) then
	 if((not user_script.is_alert) or (not suppressed_alerts)) then
	    alerts_api.invokeScriptHook(user_script, confset_id, hook_fn, {
	      granularity = granularity,
	      alert_entity = entity_info,
	      entity_info = info,
	      cur_alerts = cur_alerts,
	      user_script_config = conf.script_conf,
	      user_script = user_script,
	    })
	 end
      end
   end

-- cur_alerts contains unprocessed triggered alerts, that is,
  -- those alerts triggered but then disabled or unconfigured (e.g., when
  -- the user removes a threshold from the gui)
  if #cur_alerts > 0 then
     alerts_api.releaseEntityAlerts(entity_info, cur_alerts)
  end
end

-- #################################################################

function releaseAlerts(granularity)
  local info = network.getNetworkStats()
  local network_key = info and info.network_key
  if not network_key then return end

local entity_info = alerts_api.networkAlertEntity(network_key)

alerts_api.releaseEntityAlerts(entity_info, network.getAlerts(granularity))
end