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--
-- (C) 2019-21 - ntop.org
--
local dirs = ntop.getDirs()
package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
package.path = dirs.installdir .. "/scripts/lua/modules/datamodel/?.lua;" .. package.path
-- ##############################################
-- Import the classes library.
local classes = require "classes"
-- This is the datamodel used to represent data associated with this datasource
local slices = require "slices"
-- Rest utilities
local rest_utils = require "rest_utils"
-- ##############################################
local packet_distro = classes.class(slices)
-- ##############################################
packet_distro.meta = {
params = {
-- NOTE: Specify all the parameter keys that must be passed in the request
"ifid" -- validated according to http_lint.lua
},
}
-- ##############################################
-- Human-friendly labels for the distribution
local available_bins = {
{ key = 'upTo64', label = '<= 64' },
{ key = 'upTo128', label = '64 <= 128' },
{ key = 'upTo256', label = '128 <= 256' },
{ key = 'upTo512', label = '256 <= 512' },
{ key = 'upTo1024', label = '512 <= 1024' },
{ key = 'upTo1518', label = '1024 <= 1518' },
{ key = 'upTo2500', label = '1518 <= 2500' },
{ key = 'upTo6500', label = '2500 <= 6500' },
{ key = 'upTo9000', label = '6500 <= 9000' },
{ key = 'above9000', label = '> 9000' },
}
-- ##############################################
-- @brief Datasource constructor
function packet_distro:init()
-- Initializes parent class slices
self.super:init(10 --[[ Maximum number of slices ]],
3 --[[ Percentage under which the slice is ignored and added to other --]])
end
-- #######################################################
function packet_distro:fetch()
-- Assumes all parameters listed in self.meta.params have been parsed successfully
-- and are available in self.parsed_params
interface.select(tostring(self.parsed_params.ifid))
local ifstats = interface.getStats()
local size_bins = ifstats["pktSizeDistribution"]["size"]
self:set_label(getHumanReadableInterfaceName(getInterfaceName(ifstats.id)))
for _, bin in ipairs(available_bins) do
self:append(bin.label, size_bins[bin.key] or 0)
end
end
-- #######################################################
-- Checks if this module is being loaded as part of a REST request to this endpoint or not.
-- If the module is being loaded as part of a REST request, then a response is sent, otherwise nothing is done.
-- Must call this to ensure REST responses are sent when necessary
packet_distro:new():rest_send_response()
-- #######################################################
return packet_distro
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