Implements ability to consolidate widgets (slices and values)

attic/scripts/lua/datasources/iface_tcpflags_pkt_distro.lua

@@ -0,0 +1,50 @@
+--
+-- (C) 2020 - ntop.org
+--
+
+dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+
+require("lua_utils")
+local datasources_utils = require("datasources_utils")
+local datamodel = require("datamodel")
+
+local pkt_distribution = {
+   ['syn'] = 'SYN',
+   ['synack'] = 'SYN/ACK',
+   ['finack'] = 'FIN/ACK',
+   ['rst'] = 'RST',
+}
+
+local function reportError(msg)
+    print(json.encode({ error = msg, success = false, csrf = ntop.getRandomCSRFValue() }))
+end
+
+local ifid    = _GET["ifid"] or 0
+local if_name = getInterfaceName(ifid)
+
+interface.select(ifname)
+local ifstats = interface.getStats()
+local labels  = {}
+local slices  = {}
+
+local res = {}
+for key, value in pairs(ifstats["pktSizeDistribution"]["tcp_flags"]) do
+   if value > 0 then
+      table.insert(labels, pkt_distribution[key])
+      table.insert(slices, value)
+   end
+end
+
+if(table.len(res) == 0) then
+   table.insert(labels, "Other")
+   table.insert(slices, 100)
+end
+
+-- Prepare the results
+local m = datamodel:new(labels)
+local dataset = ifname.." TCP Flags"
+
+m:appendRow(when, dataset, slices)
+
+return(m)