mirror of
https://github.com/ntop/ntopng.git
synced 2026-04-30 07:59:35 +00:00
2845 lines
99 KiB
Lua
2845 lines
99 KiB
Lua
--
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-- (C) 2014-18 - ntop.org
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--
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-- This file contains the description of all functions
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-- used to trigger host alerts
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local verbose = ntop.getCache("ntopng.prefs.alerts.debug") == "1"
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local callback_utils = require "callback_utils"
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local template = require "template_utils"
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local json = require("dkjson")
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local host_pools_utils = require("host_pools_utils")
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local alert_consts = require "alert_consts"
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package.path = dirs.installdir .. "/scripts/lua/modules/alert_endpoints/?.lua;" .. package.path
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local alert_process_queue = "ntopng.alert_process_queue"
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local shaper_utils = nil
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local CONST_DEFAULT_PACKETS_DROP_PERCENTAGE_ALERT = "5"
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local MAX_NUM_PER_MODULE_QUEUED_ALERTS = 1024 -- should match ALERTS_MANAGER_MAX_ENTITY_ALERTS on the AlertsManager
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if(ntop.isPro()) then
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package.path = dirs.installdir .. "/pro/scripts/lua/modules/?.lua;" .. package.path
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shaper_utils = require("shaper_utils")
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end
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function alertSeverityLabel(v, nohtml)
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local res = _handleArray(alert_consts.alert_severity_keys, tonumber(v))
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if res ~= nil and nohtml == true then res = noHtml(res) end
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return res
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end
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function alertSeverity(v)
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local severity_table = {}
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for i, t in ipairs(alert_consts.alert_severity_keys) do
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severity_table[#severity_table + 1] = {t[2], t[3]}
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end
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return(_handleArray(severity_table, v))
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end
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function alertSeverityRaw(sev_idx)
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sev_idx = sev_idx + 2 -- -1 and 0
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if sev_idx <= #alert_consts.alert_severity_keys then
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return alert_consts.alert_severity_keys[sev_idx][3]
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end
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return nil
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end
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function alertTypeLabel(v, nohtml)
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local res = _handleArray(alert_consts.alert_type_keys, tonumber(v))
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if res ~= nil and nohtml == true then res = noHtml(res) end
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return res
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end
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function alertType(v)
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local typetable = {}
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for i, t in ipairs(alert_consts.alert_type_keys) do
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typetable[#typetable + 1] = {t[2], t[3]}
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end
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return(_handleArray(typetable, v))
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end
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function alertEngine(v)
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local enginetable = {}
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for i, t in ipairs(alert_consts.alert_engine_keys) do
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enginetable[#enginetable + 1] = {t[2], t[3]}
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end
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return(_handleArray(enginetable, v))
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end
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function alertEngineLabel(v)
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return _handleArray(alert_consts.alert_engine_keys, tonumber(v))
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end
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function alertEngineRaw(idx)
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idx = idx + 1
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if idx <= #alert_consts.alert_engine_keys then
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return alert_consts.alert_engine_keys[idx][3]
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end
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return nil
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end
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function alertSeverity(v)
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local severitytable = {}
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for i, t in ipairs(alert_consts.alert_severity_keys) do
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severitytable[#severitytable + 1] = {t[2], t[3]}
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end
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return(_handleArray(severitytable, v))
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end
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function alertTypeRaw(alert_idx)
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if(alert_idx == nil) then return nil end
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alert_idx = alert_idx + 2 -- -1 and 0
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if alert_idx <= #alert_consts.alert_type_keys then
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return alert_consts.alert_type_keys[alert_idx][3]
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end
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return nil
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end
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function alertEntityLabel(v, nothml)
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local res = _handleArray(alert_consts.alert_entity_keys, tonumber(v))
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if res ~= nil and nohtml == true then res = noHtml(res) end
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return res
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end
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function alertEntity(v)
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local typetable = {}
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for i, t in ipairs(alert_consts.alert_entity_keys) do
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typetable[#typetable + 1] = {t[2], t[3]}
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end
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return(_handleArray(typetable, v))
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end
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function alertEntityRaw(entity_idx)
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entity_idx = entity_idx + 1
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if entity_idx <= #alert_consts.alert_entity_keys then
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return alert_consts.alert_entity_keys[entity_idx][3]
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end
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return nil
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end
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-- ##############################################################################
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local function ndpival_bytes(json, protoname)
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key = "ndpiStats"
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-- Host
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if((json[key] == nil) or (json[key][protoname] == nil)) then
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if(verbose) then print("## ("..protoname..") Empty<br>\n") end
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return(0)
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else
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local v = (json[key][protoname]["bytes"]["sent"] or 0) + (json[key][protoname]["bytes"]["rcvd"] or 0)
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if(verbose) then print("## ("..protoname..") "..v.."<br>\n") end
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return(v)
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end
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end
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local function proto_bytes(old, new, protoname)
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return(ndpival_bytes(new, protoname) - ndpival_bytes(old, protoname))
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end
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--
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-- NOTE
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--
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-- These functions are called by the loadstring function to evaluate
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-- threshold crosses.
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-- When reading a field from the "old" parameter, an "or" operator should be used
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-- to avoid working on nil value. Nil values can be found, for example, when a
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-- new entity appear and it has not previous dump or across ntopng reboot.
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--
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function bytes(old, new, interval)
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-- io.write(debug.traceback().."\n")
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if(verbose) then print("bytes("..interval..")") end
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if(new["sent"] ~= nil) then
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-- Host
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return((new["sent"]["bytes"] + new["rcvd"]["bytes"]) - ((old["sent"] and old["sent"]["bytes"] or 0) + (old["rcvd"] and old["rcvd"]["bytes"] or 0)))
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else
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-- Interface
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return(new.stats.bytes - (old.stats and old.stats.bytes or 0))
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end
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end
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function packets(old, new, interval)
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if(verbose) then print("packets("..interval..")") end
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if(new["sent"] ~= nil) then
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-- Host
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return((new["sent"]["packets"] + new["rcvd"]["packets"]) - ((old["sent"] and old["sent"]["packets"] or 0) + (old["rcvd"] and old["rcvd"]["packets"] or 0)))
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else
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-- Interface
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return(new.stats.packets - (old.stats and old.stats.packets or 0))
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end
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end
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function active(old, new, interval)
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if(verbose) then print("active("..interval..")") end
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local diff = (new["total_activity_time"] or 0) - (old["total_activity_time"] or 0)
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return(diff)
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end
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function idle(old, new, interval)
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if(verbose) then print("idle("..interval..")") end
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local diff = os.time()-new["seen.last"]
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return(diff)
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end
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function dns(old, new, interval)
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if(verbose) then print("dns("..interval..")") end
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return(proto_bytes(old, new, "DNS"))
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end
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function p2p(old, new, interval)
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if(verbose) then print("p2p("..interval..")") end
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return(proto_bytes(old, new, "eDonkey") + proto_bytes(old, new, "BitTorrent") + proto_bytes(old, new, "Skype"))
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end
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function throughput(old, new, interval)
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if(verbose) then print("throughput("..interval..")") end
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return((bytes(old, new, interval) * 8)/ (interval*1000000))
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end
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function ingress(old, new, interval)
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return new["ingress"] - (old["ingress"] or 0)
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end
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function egress(old, new, interval)
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return new["egress"] - (old["egress"] or 0)
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end
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function inner(old, new, interval)
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return new["inner"] - (old["inner"] or 0)
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end
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function flows(old, new, interval)
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local new_flows = new["flows.as_client"] + new["flows.as_server"]
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local old_flows = (old["flows.as_client"] or 0) + (old["flows.as_server"] or 0)
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return new_flows - old_flows
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end
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-- ##############################################################################
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local function getInterfacePacketDropPercAlertKey(ifname)
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return "ntopng.prefs.iface_" .. getInterfaceId(ifname) .. ".packet_drops_alert"
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end
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-- ##############################################################################
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if ntop.isEnterprise() then
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local dirs = ntop.getDirs()
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package.path = dirs.installdir .. "/pro/scripts/lua/enterprise/modules/?.lua;" .. package.path
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require "enterprise_alert_utils"
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end
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j = require("dkjson")
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require "persistence"
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function is_allowed_timespan(timespan)
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for _, granularity in pairs(alert_consts.alerts_granularity) do
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granularity = granularity[1]
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if timespan == granularity then
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return true
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end
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end
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return false
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end
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function is_allowed_alarmable_metric(metric)
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for _, allowed_metric in pairs(alert_consts.alarmable_metrics) do
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if metric == allowed_metric then
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return true
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end
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end
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return false
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end
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function get_alerts_hash_name(timespan, ifname)
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local ifid = getInterfaceId(ifname)
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if not is_allowed_timespan(timespan) or tonumber(ifid) == nil then
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return nil
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end
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return "ntopng.prefs.alerts_"..timespan..".ifid_"..tostring(ifid)
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end
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-- Get the hash key used for saving global settings
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function get_global_alerts_hash_key(entity_type, alert_source)
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if entity_type == "host" then
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return "local_hosts"
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elseif entity_type == "interface" then
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return "interfaces"
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elseif entity_type == "network" then
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return "local_networks"
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else
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return "*"
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end
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end
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function get_make_room_keys(ifId)
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return {flows="ntopng.cache.alerts.ifid_"..ifId..".make_room_flow_alerts",
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entities="ntopng.cache.alerts.ifid_"..ifId..".make_room_closed_alerts"}
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end
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-- =====================================================
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function get_alerts_suppressed_hash_name(ifid)
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local hash_name = "ntopng.prefs.alerts.ifid_"..ifid
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return hash_name
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end
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function are_alerts_suppressed(observed, ifid)
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local suppressAlerts = ntop.getHashCache(get_alerts_suppressed_hash_name(ifid), observed)
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--[[
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tprint("are_alerts_suppressed ".. suppressAlerts)
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tprint("are_alerts_suppressed observed: ".. observed)
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tprint("are_alerts_suppressed ifname: "..ifname)
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--]]
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if((suppressAlerts == "") or (suppressAlerts == nil) or (suppressAlerts == "true")) then
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return false -- alerts are not suppressed
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else
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if(verbose) then print("Skipping alert check for("..observed.."): disabled in preferences<br>\n") end
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return true -- alerts are suppressed
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end
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end
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-- #################################
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-- Note: see getConfiguredAlertsThresholds for threshold object format
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local function entity_threshold_crossed(granularity, old_table, new_table, threshold)
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local rc
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local threshold_info = table.clone(threshold)
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if old_table and new_table then -- meaningful checks require both new and old tables
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-- Needed because Lua. loadstring() won't work otherwise.
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old = old_table
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new = new_table
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duration = granularity2sec(granularity)
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local op = op2jsop(threshold.operator)
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-- This is where magic happens: loadstring() evaluates the string
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local what = "val = "..threshold.metric.."(old, new, duration); if(val ".. op .. " " .. threshold.edge .. ") then return(true) else return(false) end"
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local f = loadstring(what)
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rc = f()
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threshold_info.value = val
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else
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rc = false
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threshold_info.value = nil
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end
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return rc, threshold_info
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end
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-- #################################
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function granularity2sec(g)
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for _, granularity in pairs(alert_consts.alerts_granularity) do
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if(granularity[1] == g) then
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return(granularity[3])
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end
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end
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return(0)
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end
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function op2jsop(op)
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if op == "gt" then
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return ">"
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elseif op == "lt" then
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return "<"
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else
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return "=="
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end
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end
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function performAlertsQuery(statement, what, opts, force_query)
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local wargs = {"WHERE", "1=1"}
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if tonumber(opts.row_id) ~= nil then
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wargs[#wargs+1] = 'AND rowid = '..(opts.row_id)
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end
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if (not isEmptyString(opts.entity)) and (not isEmptyString(opts.entity_val)) then
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if((what == "historical-flows") and (alertEntityRaw(opts.entity) == "host")) then
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-- need to handle differently for flows table
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local info = hostkey2hostinfo(opts.entity_val)
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wargs[#wargs+1] = 'AND (cli_addr="'..(info.host)..'" OR srv_addr="'..(info.host)..'")'
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wargs[#wargs+1] = 'AND vlan_id='..(info.vlan)
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else
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wargs[#wargs+1] = 'AND alert_entity = "'..(opts.entity)..'"'
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wargs[#wargs+1] = 'AND alert_entity_val = "'..(opts.entity_val)..'"'
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end
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end
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if not isEmptyString(opts.origin) then
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local info = hostkey2hostinfo(opts.origin)
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wargs[#wargs+1] = 'AND cli_addr="'..(info.host)..'"'
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wargs[#wargs+1] = 'AND vlan_id='..(info.vlan)
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end
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if not isEmptyString(opts.target) then
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local info = hostkey2hostinfo(opts.target)
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wargs[#wargs+1] = 'AND srv_addr="'..(info.host)..'"'
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wargs[#wargs+1] = 'AND vlan_id='..(info.vlan)
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end
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if tonumber(opts.epoch_begin) ~= nil then
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wargs[#wargs+1] = 'AND alert_tstamp >= '..(opts.epoch_begin)
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end
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if tonumber(opts.epoch_end) ~= nil then
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wargs[#wargs+1] = 'AND alert_tstamp <= '..(opts.epoch_end)
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end
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if not isEmptyString(opts.flowhosts_type) then
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if opts.flowhosts_type ~= "all_hosts" then
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local cli_local, srv_local = 0, 0
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if opts.flowhosts_type == "local_only" then cli_local, srv_local = 1, 1
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elseif opts.flowhosts_type == "remote_only" then cli_local, srv_local = 0, 0
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elseif opts.flowhosts_type == "local_origin_remote_target" then cli_local, srv_local = 1, 0
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elseif opts.flowhosts_type == "remote_origin_local_target" then cli_local, srv_local = 0, 1
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end
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if what == "historical-flows" then
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wargs[#wargs+1] = "AND cli_localhost = "..cli_local
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wargs[#wargs+1] = "AND srv_localhost = "..srv_local
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end
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-- TODO cannot apply it to other tables right now
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end
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end
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if tonumber(opts.alert_type) ~= nil then
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wargs[#wargs+1] = "AND alert_type = "..(opts.alert_type)
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end
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if tonumber(opts.alert_severity) ~= nil then
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wargs[#wargs+1] = "AND alert_severity = "..(opts.alert_severity)
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end
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if tonumber(opts.alert_engine) ~= nil then
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wargs[#wargs+1] = "AND alert_engine = "..(opts.alert_engine)
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end
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if((not isEmptyString(opts.sortColumn)) and (not isEmptyString(opts.sortOrder))) then
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local order_by
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if opts.sortColumn == "column_date" then
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order_by = "alert_tstamp"
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elseif opts.sortColumn == "column_severity" then
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order_by = "alert_severity"
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elseif opts.sortColumn == "column_type" then
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order_by = "alert_type"
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elseif((opts.sortColumn == "column_duration") and (what == "historical")) then
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order_by = "(alert_tstamp_end - alert_tstamp)"
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else
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-- default
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order_by = "alert_tstamp"
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end
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wargs[#wargs+1] = "ORDER BY "..order_by
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wargs[#wargs+1] = string.upper(opts.sortOrder)
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end
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-- pagination
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if((tonumber(opts.perPage) ~= nil) and (tonumber(opts.currentPage) ~= nil)) then
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local to_skip = (tonumber(opts.currentPage)-1) * tonumber(opts.perPage)
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wargs[#wargs+1] = "LIMIT"
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wargs[#wargs+1] = to_skip..","..(opts.perPage)
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end
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local query = table.concat(wargs, " ")
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local res
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-- Uncomment to debug the queries
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--~ tprint(statement.." (from "..what..") "..query)
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if what == "engaged" then
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res = interface.queryAlertsRaw(true, statement, query, force_query)
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elseif what == "historical" then
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res = interface.queryAlertsRaw(false, statement, query, force_query)
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elseif what == "historical-flows" then
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res = interface.queryFlowAlertsRaw(statement, query, force_query)
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else
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error("Invalid alert subject: "..what)
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end
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return res
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end
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-- #################################
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function getNumAlerts(what, options)
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local num = 0
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local opts = getUnpagedAlertOptions(options or {})
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local res = performAlertsQuery("SELECT COUNT(*) AS count", what, opts)
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if((res ~= nil) and (#res == 1) and (res[1].count ~= nil)) then num = tonumber(res[1].count) end
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return num
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end
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-- #################################
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function getAlerts(what, options)
|
|
return performAlertsQuery("SELECT rowid, *", what, options)
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function deleteAlerts(what, options)
|
|
local opts = getUnpagedAlertOptions(options or {})
|
|
performAlertsQuery("DELETE", what, opts)
|
|
invalidateEngagedAlertsCache(getInterfaceId(ifname))
|
|
end
|
|
|
|
-- #################################
|
|
|
|
-- this function returns an object with parameters specific for one tab
|
|
function getTabParameters(_get, what)
|
|
local opts = {}
|
|
for k,v in pairs(_get) do opts[k] = v end
|
|
|
|
-- these options are contextual to the current tab (status)
|
|
if _get.status ~= what then
|
|
opts.alert_type = nil
|
|
opts.alert_severity = nil
|
|
end
|
|
if not isEmptyString(what) then opts.status = what end
|
|
return opts
|
|
end
|
|
|
|
-- #################################
|
|
|
|
-- Remove pagination options from the options
|
|
function getUnpagedAlertOptions(options)
|
|
local res = {}
|
|
|
|
local paged_option = { currentPage=1, perPage=1, sortColumn=1, sortOrder=1 }
|
|
|
|
for k,v in pairs(options) do
|
|
if not paged_option[k] then
|
|
res[k] = v
|
|
end
|
|
end
|
|
|
|
return res
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function checkDeleteStoredAlerts()
|
|
_GET["status"] = _GET["status"] or _POST["status"]
|
|
|
|
if((_POST["id_to_delete"] ~= nil) and (_GET["status"] ~= nil)) then
|
|
if(_POST["id_to_delete"] ~= "__all__") then
|
|
_GET["row_id"] = tonumber(_POST["id_to_delete"])
|
|
end
|
|
|
|
deleteAlerts(_GET["status"], _GET)
|
|
-- to avoid performing the delete again
|
|
_POST["id_to_delete"] = nil
|
|
-- to avoid filtering by id
|
|
_GET["row_id"] = nil
|
|
-- in case of delete "older than" button, resets the time period after the delete took place
|
|
if isEmptyString(_GET["epoch_begin"]) then _GET["epoch_end"] = nil end
|
|
|
|
local new_num = getNumAlerts(_GET["status"], _GET)
|
|
if new_num == 0 then
|
|
-- reset the filter to avoid hiding the tab
|
|
_GET["alert_severity"] = nil
|
|
_GET["alert_type"] = nil
|
|
end
|
|
end
|
|
end
|
|
|
|
-- #################################
|
|
|
|
--
|
|
-- This function should be updated whenever a new alert entity type is available.
|
|
-- If entity_info is nil, then no links will be provided.
|
|
--
|
|
local function formatAlertEntity(ifid, entity_type, entity_value, entity_info)
|
|
local value
|
|
|
|
if entity_type == "host" then
|
|
local host_info = hostkey2hostinfo(entity_value)
|
|
value = resolveAddress(host_info)
|
|
|
|
if host_info ~= nil then
|
|
value = "<a href='"..ntop.getHttpPrefix().."/lua/host_details.lua?ifid="..ifid
|
|
.."&host="..hostinfo2hostkey(host_info).."'>"..value.."</a>"
|
|
end
|
|
elseif entity_type == "interface" then
|
|
value = getInterfaceName(ifid)
|
|
|
|
if entity_info ~= nil then
|
|
value = "<a href='"..ntop.getHttpPrefix().."/lua/if_stats.lua?ifid="..ifid.."'>"..value.."</a>"
|
|
end
|
|
elseif entity_type == "network" then
|
|
value = hostkey2hostinfo(entity_value)["host"]
|
|
|
|
if entity_info ~= nil then
|
|
value = "<a href='"..ntop.getHttpPrefix().."/lua/network_details.lua?network="..(entity_info.network_id).."&page=historical'>"
|
|
..value.."</a>"
|
|
end
|
|
else
|
|
-- fallback
|
|
value = entity_value
|
|
end
|
|
|
|
-- try to get a localized message
|
|
local localized = i18n("alert_messages."..entity_type.."_entity", {entity_value=value})
|
|
|
|
if localized ~= nil then
|
|
return localized
|
|
else
|
|
-- fallback
|
|
return entity_type.." "..value
|
|
end
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function formatRawFlow(record, flow_json)
|
|
require "flow_utils"
|
|
|
|
-- pretend record is a flow to reuse getFlowLabel
|
|
local flow = {
|
|
["cli.ip"] = record["cli_addr"], ["cli.port"] = tonumber(record["cli_port"]),
|
|
["cli.blacklisted"] = tostring(record["cli_blacklisted"]) == "1",
|
|
["srv.ip"] = record["srv_addr"], ["srv.port"] = tonumber(record["srv_port"]),
|
|
["srv.blacklisted"] = tostring(record["srv_blacklisted"]) == "1",
|
|
["vlan"] = record["vlan_id"]}
|
|
flow = "["..i18n("flow")..": "..(getFlowLabel(flow, false, true) or "").."] "
|
|
|
|
local l4_proto_label, l4_proto = l4_proto_to_string(record["proto"] or 0) or ""
|
|
|
|
if not isEmptyString(l4_proto_label) then
|
|
flow = flow.."[" .. i18n("l4_protocol") .. ": " .. l4_proto_label .. "] "
|
|
end
|
|
|
|
if (l4_proto == "tcp") or (l4_proto =="udp") then
|
|
local l7proto_name = interface.getnDPIProtoName(tonumber(record["l7_proto"]) or 0)
|
|
|
|
if not isEmptyString(l7proto_name) then
|
|
flow = flow.."["..i18n("db_explorer.application_protocol")..": <A HREF='"..ntop.getHttpPrefix().."/lua/hosts_stats.lua?protocol="..record["l7_proto"].."'> " ..l7proto_name.."</A>] "
|
|
end
|
|
end
|
|
|
|
local decoded = json.decode(flow_json)
|
|
|
|
if decoded ~= nil then
|
|
-- render the json
|
|
local msg = ""
|
|
if not isEmptyString(record["flow_status"]) then
|
|
msg = msg..getFlowStatus(tonumber(record["flow_status"])).." "
|
|
end
|
|
if not isEmptyString(flow) then
|
|
msg = msg..flow.." "
|
|
end
|
|
if not isEmptyString(decoded["info"]) then
|
|
local lb = ""
|
|
if (record["flow_status"] == "13") -- blacklisted flow
|
|
and (not flow["srv.blacklisted"]) and (not flow["cli.blacklisted"]) then
|
|
lb = " <i class='fa fa-ban' aria-hidden='true' title='Blacklisted'></i>"
|
|
end
|
|
msg = msg.."["..i18n("info")..": "..decoded["info"]..lb.."] "
|
|
end
|
|
|
|
flow = msg
|
|
end
|
|
|
|
return flow
|
|
end
|
|
|
|
-- #################################
|
|
|
|
local function drawDropdown(status, selection_name, active_entry, entries_table, button_label)
|
|
-- alert_consts.alert_severity_keys and alert_consts.alert_type_keys are defined in lua_utils
|
|
local id_to_label
|
|
if selection_name == "severity" then
|
|
id_to_label = alertSeverityLabel
|
|
elseif selection_name == "type" then
|
|
id_to_label = alertTypeLabel
|
|
end
|
|
|
|
-- compute counters to avoid printing items that have zero entries in the database
|
|
local actual_entries = {}
|
|
if status == "historical-flows" then
|
|
|
|
if selection_name == "severity" then
|
|
actual_entries = interface.queryFlowAlertsRaw("select alert_severity id, count(*) count", "group by alert_severity")
|
|
elseif selection_name == "type" then
|
|
actual_entries = interface.queryFlowAlertsRaw("select alert_type id, count(*) count", "group by alert_type")
|
|
end
|
|
|
|
else -- dealing with non flow alerts (engaged and closed)
|
|
local engaged
|
|
if status == "engaged" then
|
|
engaged = true
|
|
elseif status == "historical" then
|
|
engaged = false
|
|
end
|
|
|
|
if selection_name == "severity" then
|
|
actual_entries = interface.queryAlertsRaw(engaged, "select alert_severity id, count(*) count", "group by alert_severity")
|
|
elseif selection_name == "type" then
|
|
actual_entries = interface.queryAlertsRaw(engaged, "select alert_type id, count(*) count", "group by alert_type")
|
|
end
|
|
|
|
end
|
|
|
|
local buttons = '<div class="btn-group">'
|
|
|
|
button_label = button_label or firstToUpper(selection_name)
|
|
if active_entry ~= nil and active_entry ~= "" then
|
|
button_label = firstToUpper(active_entry)..'<span class="glyphicon glyphicon-filter"></span>'
|
|
end
|
|
|
|
buttons = buttons..'<button class="btn btn-link dropdown-toggle" data-toggle="dropdown">'..button_label
|
|
buttons = buttons..'<span class="caret"></span></button>'
|
|
|
|
buttons = buttons..'<ul class="dropdown-menu dropdown-menu-right" role="menu">'
|
|
|
|
local class_active = ""
|
|
if active_entry == nil then class_active = ' class="active"' end
|
|
buttons = buttons..'<li'..class_active..'><a href="?status='..status..'">All</a></i>'
|
|
|
|
for _, entry in pairs(actual_entries) do
|
|
local id = tonumber(entry["id"])
|
|
local count = entry["count"]
|
|
local label = id_to_label(id, true)
|
|
|
|
class_active = ""
|
|
if label == active_entry then class_active = ' class="active"' end
|
|
-- buttons = buttons..'<li'..class_active..'><a href="'..ntop.getHttpPrefix()..'/lua/show_alerts.lua?status='..status
|
|
buttons = buttons..'<li'..class_active..'><a href="?status='..status
|
|
buttons = buttons..'&alert_'..selection_name..'='..id..'">'
|
|
buttons = buttons..firstToUpper(label)..' ('..count..')</a></li>'
|
|
end
|
|
|
|
buttons = buttons..'</ul></div>'
|
|
|
|
return buttons
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function getGlobalAlertsConfigurationHash(granularity, entity_type, alert_source)
|
|
return 'ntopng.prefs.alerts_global.'..granularity.."."..get_global_alerts_hash_key(entity_type, alert_source)
|
|
end
|
|
|
|
local global_redis_thresholds_key = "thresholds"
|
|
|
|
-- #################################
|
|
|
|
function drawAlertSourceSettings(entity_type, alert_source, delete_button_msg, delete_confirm_msg, page_name, page_params, alt_name, show_entity, options)
|
|
local num_engaged_alerts, num_past_alerts, num_flow_alerts = 0,0,0
|
|
local tab = _GET["tab"]
|
|
local have_nedge = ntop.isnEdge()
|
|
|
|
-- This code controls which entries to show under the tabs Every Minute/Hourly/Daily
|
|
local descr
|
|
if entity_type == "network" then
|
|
descr = table.clone(alert_consts.network_alert_functions_description)
|
|
elseif entity_type == "interface" then
|
|
-- interface
|
|
descr = table.clone(alert_consts.alert_functions_description)
|
|
descr["active"] = nil
|
|
descr["flows"] = nil
|
|
else
|
|
-- host
|
|
descr = table.clone(alert_consts.alert_functions_description)
|
|
end
|
|
|
|
local flow_rate_attacker_key = "flow_attacker_threshold"
|
|
local flow_rate_victim_key = "flow_victim_threshold"
|
|
local syn_attacker_key = "syn_attacker_threshold"
|
|
local syn_victim_key = "syn_victim_threshold"
|
|
local anomaly_config_key = nil
|
|
local flow_rate_alert_thresh, syn_alert_thresh
|
|
|
|
if entity_type == "host" then
|
|
anomaly_config_key = 'ntopng.prefs.'..(options.host_ip)..':'..tostring(options.host_vlan)..'.alerts_config'
|
|
end
|
|
|
|
print('<ul class="nav nav-tabs">')
|
|
|
|
local function printTab(tab, content, sel_tab)
|
|
if(tab == sel_tab) then print("\t<li class=active>") else print("\t<li>") end
|
|
print("<a href=\""..ntop.getHttpPrefix().."/lua/"..page_name.."?page=alerts&tab="..tab)
|
|
for param, value in pairs(page_params) do
|
|
print("&"..param.."="..value)
|
|
end
|
|
print("\">"..content.."</a></li>\n")
|
|
end
|
|
|
|
if(show_entity) then
|
|
-- these fields will be used to perform queries
|
|
_GET["entity"] = alertEntity(show_entity)
|
|
_GET["entity_val"] = alert_source
|
|
end
|
|
|
|
if(show_entity) then
|
|
-- possibly process pending delete arguments
|
|
checkDeleteStoredAlerts()
|
|
|
|
-- possibly add a tab if there are alerts configured for the host
|
|
num_engaged_alerts = getNumAlerts("engaged", getTabParameters(_GET, "engaged"))
|
|
num_past_alerts = getNumAlerts("historical", getTabParameters(_GET, "historical"))
|
|
num_flow_alerts = getNumAlerts("historical-flows", getTabParameters(_GET, "historical-flows"))
|
|
|
|
if num_past_alerts > 0 or num_engaged_alerts > 0 or num_flow_alerts > 0 then
|
|
if(tab == nil) then
|
|
-- if no tab is selected and there are alerts, we show them by default
|
|
tab = "alert_list"
|
|
end
|
|
|
|
printTab("alert_list", "Detected Alerts", tab)
|
|
else
|
|
-- if there are no alerts, we show the alert settings
|
|
if(tab=="alert_list") then tab = nil end
|
|
end
|
|
end
|
|
|
|
-- Default tab
|
|
if(tab == nil) then tab = "min" end
|
|
|
|
if(tab ~= "alert_list") then
|
|
local granularity_label = alertEngineLabel(alertEngine(tab))
|
|
|
|
print(
|
|
template.gen("modal_confirm_dialog.html", {
|
|
dialog={
|
|
id = "deleteAlertSourceSettings",
|
|
action = "deleteAlertSourceSettings()",
|
|
title = i18n("show_alerts.delete_alerts_configuration"),
|
|
message = i18n(delete_confirm_msg, {granularity=granularity_label}) .. " <span style='white-space: nowrap;'>" .. ternary(alt_name ~= nil, alt_name, alert_source).."</span>?",
|
|
confirm = i18n("delete")
|
|
}
|
|
})
|
|
)
|
|
|
|
print(
|
|
template.gen("modal_confirm_dialog.html", {
|
|
dialog={
|
|
id = "deleteGlobalAlertConfig",
|
|
action = "deleteGlobalAlertConfig()",
|
|
title = i18n("show_alerts.delete_alerts_configuration"),
|
|
message = i18n("show_alerts.delete_config_message", {conf = entity_type, granularity=granularity_label}).."?",
|
|
confirm = i18n("delete")
|
|
}
|
|
})
|
|
)
|
|
end
|
|
|
|
for _,e in pairs(alert_consts.alerts_granularity) do
|
|
local k = e[1]
|
|
local l = e[2]
|
|
l = '<i class="fa fa-cog" aria-hidden="true"></i> '..l
|
|
printTab(k, l, tab)
|
|
end
|
|
|
|
local anomalies_config = {
|
|
{
|
|
title = i18n("entity_thresholds.flow_attacker_title"),
|
|
descr = i18n("entity_thresholds.flow_attacker_description"),
|
|
key = flow_rate_attacker_key,
|
|
global_default = 25, step = 1
|
|
}, {
|
|
title = i18n("entity_thresholds.flow_victim_title"),
|
|
descr = i18n("entity_thresholds.flow_victim_description"),
|
|
key = flow_rate_victim_key,
|
|
global_default = 25, step = 1
|
|
}, {
|
|
title = i18n("entity_thresholds.syn_attacker_title"),
|
|
descr = i18n("entity_thresholds.syn_attacker_description"),
|
|
key = syn_attacker_key,
|
|
global_default = 10, step = 5
|
|
}, {
|
|
title = i18n("entity_thresholds.syn_victim_title"),
|
|
descr = i18n("entity_thresholds.syn_victim_description"),
|
|
key = syn_victim_key,
|
|
global_default = 10, step = 5
|
|
}
|
|
}
|
|
|
|
local global_redis_hash = getGlobalAlertsConfigurationHash(tab, entity_type, alert_source)
|
|
|
|
print('</ul>')
|
|
|
|
if((show_entity) and (tab == "alert_list")) then
|
|
drawAlertTables(num_past_alerts, num_engaged_alerts, num_flow_alerts, _GET, true)
|
|
else
|
|
-- Before doing anything we need to check if we need to save values
|
|
|
|
vals = { }
|
|
alerts = ""
|
|
global_alerts = ""
|
|
anomalies = {}
|
|
global_anomalies = {}
|
|
to_save = false
|
|
|
|
if((_POST["to_delete"] ~= nil) and (_POST["SaveAlerts"] == nil)) then
|
|
if _POST["to_delete"] == "local" then
|
|
-- Delete threshold configuration
|
|
ntop.delHashCache(get_alerts_hash_name(tab, ifname), alert_source)
|
|
|
|
-- Delete specific settings
|
|
if entity_type == "host" then
|
|
ntop.delCache(anomaly_config_key)
|
|
interface.refreshHostsAlertsConfiguration()
|
|
elseif entity_type == "interface" then
|
|
ntop.delCache(getInterfacePacketDropPercAlertKey(ifname))
|
|
interface.loadPacketsDropsAlertPrefs()
|
|
end
|
|
alerts = nil
|
|
|
|
-- Load the global settings normally
|
|
global_alerts = ntop.getHashCache(global_redis_hash, global_redis_thresholds_key)
|
|
else
|
|
-- Only delete global configuration
|
|
ntop.delCache(global_redis_hash)
|
|
end
|
|
end
|
|
|
|
if _POST["to_delete"] ~= "local" then
|
|
for k,_ in pairs(descr) do
|
|
value = _POST["value_"..k]
|
|
operator = _POST["op_"..k]
|
|
|
|
if((value ~= nil) and (operator ~= nil)) then
|
|
--io.write("\t"..k.."\n")
|
|
to_save = true
|
|
value = tonumber(value)
|
|
if(value ~= nil) then
|
|
if(alerts ~= "") then alerts = alerts .. "," end
|
|
alerts = alerts .. k .. ";" .. operator .. ";" .. value
|
|
end
|
|
|
|
-- Handle global settings
|
|
local global_value = tonumber(_POST["value_global_"..k])
|
|
local global_operator = _POST["op_global_"..k]
|
|
|
|
if (global_value ~= nil) and (global_operator ~= nil) then
|
|
if(global_alerts ~= "") then global_alerts = global_alerts .. "," end
|
|
global_alerts = global_alerts..k..";"..global_operator..";"..global_value
|
|
end
|
|
end
|
|
end --END for k,_ in pairs(descr) do
|
|
|
|
-- Save source specific anomalies
|
|
if (tab == "min") and (to_save or (_POST["to_delete"] ~= nil)) then
|
|
if entity_type == "host" then
|
|
local config_to_dump = {}
|
|
|
|
for _, config in ipairs(anomalies_config) do
|
|
local value = _POST[config.key]
|
|
local global_value = _POST["global_"..config.key]
|
|
|
|
if isEmptyString(global_value) then
|
|
global_value = config.global_default
|
|
end
|
|
|
|
global_anomalies["global_"..config.key] = global_value
|
|
ntop.setHashCache(global_redis_hash, config.key, global_value)
|
|
|
|
if not isEmptyString(value) then
|
|
anomalies[config.key] = value
|
|
else
|
|
value = "global"
|
|
end
|
|
|
|
config_to_dump[#config_to_dump + 1] = value
|
|
end
|
|
|
|
-- Serialize the settings
|
|
local configdump = table.concat(config_to_dump, "|")
|
|
ntop.setCache(anomaly_config_key, configdump)
|
|
interface.refreshHostsAlertsConfiguration()
|
|
elseif entity_type == "interface" then
|
|
local value = _POST["packets_drops_perc"]
|
|
ntop.setCache(getInterfacePacketDropPercAlertKey(ifname), ternary(not isEmptyString(value), value, "0"))
|
|
interface.loadPacketsDropsAlertPrefs()
|
|
end
|
|
end
|
|
|
|
--print(alerts)
|
|
|
|
if(to_save) then
|
|
-- This specific entity alerts
|
|
if(alerts == "") then
|
|
ntop.delHashCache(get_alerts_hash_name(tab, ifname), alert_source)
|
|
else
|
|
ntop.setHashCache(get_alerts_hash_name(tab, ifname), alert_source, alerts)
|
|
end
|
|
|
|
-- Global alerts
|
|
if(global_alerts ~= "") then
|
|
ntop.setHashCache(global_redis_hash, global_redis_thresholds_key, global_alerts)
|
|
else
|
|
ntop.delHashCache(global_redis_hash, global_redis_thresholds_key)
|
|
end
|
|
else
|
|
alerts = ntop.getHashCache(get_alerts_hash_name(tab, ifname), alert_source)
|
|
global_alerts = ntop.getHashCache(global_redis_hash, global_redis_thresholds_key)
|
|
end
|
|
end -- END if _POST["to_delete"] ~= nil
|
|
|
|
--print(alerts)
|
|
--tokens = string.split(alerts, ",")
|
|
for _, al in pairs({
|
|
{prefix = "", config = alerts},
|
|
{prefix = "global_", config = global_alerts},
|
|
}) do
|
|
if al.config ~= nil then
|
|
tokens = split(al.config, ",")
|
|
|
|
--print(tokens)
|
|
if(tokens ~= nil) then
|
|
for _,s in pairs(tokens) do
|
|
t = string.split(s, ";")
|
|
--print("-"..t[1].."-")
|
|
if(t ~= nil) then vals[(al.prefix)..t[1]] = { t[2], t[3] } end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
|
|
print [[
|
|
</ul>
|
|
<form method="post">
|
|
<table id="user" class="table table-bordered table-striped" style="clear: both"> <tbody>
|
|
<tr><th>]] print(i18n("alerts_thresholds_config.threshold_type")) print[[</th><th width=30%>]] print(i18n("alerts_thresholds_config.thresholds_single_source", {source=firstToUpper(entity_type),alt_name=ternary(alt_name ~= nil, alt_name, alert_source)})) print[[</th><th width=30%>]] print(i18n("alerts_thresholds_config.common_thresholds_local_sources", {source=firstToUpper(entity_type)}))
|
|
print[[</th></tr>]]
|
|
print('<input id="csrf" name="csrf" type="hidden" value="'..ntop.getRandomCSRFValue()..'" />\n')
|
|
|
|
for key,v in pairsByKeys(descr, asc) do
|
|
print("<tr><td><b>".. alert_consts.alert_functions_info[key].label .."</b><br>")
|
|
print("<small>"..v.."</small>\n")
|
|
|
|
for _, prefix in pairs({"", "global_"}) do
|
|
local k = prefix..key
|
|
print("</td><td>")
|
|
print("<select name=op_".. k ..">\n")
|
|
if((vals[k] ~= nil) and (vals[k][1] == "gt")) then print("<option selected=\"selected\"") else print("<option ") end
|
|
print("value=\"gt\">></option>\n")
|
|
|
|
if((vals[k] ~= nil) and (vals[k][1] == "lt")) then print("<option selected=\"selected\"") else print("<option ") end
|
|
print("value=\"lt\"><</option>\n")
|
|
print("</select>\n")
|
|
print("<input type=number min=1 step=1 class=\"text-right form-control\" style=\"display:inline; width:12em;\" name=\"value_"..k.."\" value=\"")
|
|
if(vals[k] ~= nil) then print(vals[k][2]) end
|
|
print("\">\n")
|
|
end
|
|
print("</td></tr>\n")
|
|
end
|
|
|
|
if (entity_type == "host") and (tab == "min") then
|
|
local vals = table.merge(anomalies, global_anomalies)
|
|
|
|
-- Possibly load old config
|
|
local serialized_config = ntop.getCache(anomaly_config_key)
|
|
local deserialized_config
|
|
if isEmptyString(serialized_config) then
|
|
deserialized_config = {}
|
|
else
|
|
deserialized_config = split(serialized_config, "|")
|
|
end
|
|
|
|
for idx, config in ipairs(anomalies_config) do
|
|
if isEmptyString(vals[config.key]) then
|
|
if idx <= #deserialized_config
|
|
and deserialized_config[idx] ~= "global"
|
|
and not isEmptyString(deserialized_config[idx]) then
|
|
vals[config.key] = deserialized_config[idx]
|
|
end
|
|
end
|
|
|
|
if isEmptyString(vals["global_"..config.key]) then
|
|
vals["global_"..config.key] = ntop.getHashCache(global_redis_hash, config.key)
|
|
if isEmptyString(vals["global_"..config.key]) then
|
|
vals["global_"..config.key] = config.global_default
|
|
end
|
|
end
|
|
end
|
|
|
|
-- Print the config
|
|
if not have_nedge then
|
|
for _, config in ipairs(anomalies_config) do
|
|
print("<tr><td><b>"..(config.title).."</b><br>\n")
|
|
print("<small>"..(config.descr)..".</small>")
|
|
|
|
for _, prefix in pairs({"", "global_"}) do
|
|
local key = prefix..config.key
|
|
|
|
print("</td><td>\n")
|
|
print('<input type="number" class=\"text-right form-control\" name="'..key..'" style="display:inline; width:7em;" placeholder="" min="'..(config.step)..'" step="'..(config.step)..'" max="100000" value="')
|
|
print(tostring(vals[key] or ""))
|
|
print[["></input>]]
|
|
end
|
|
|
|
print("</td></tr>")
|
|
end
|
|
end
|
|
elseif (entity_type == "interface") and (tab == "min") then
|
|
local drop_perc = ntop.getCache(getInterfacePacketDropPercAlertKey(ifname), _POST["packets_drops_perc"])
|
|
if isEmptyString(drop_perc) then
|
|
drop_perc = CONST_DEFAULT_PACKETS_DROP_PERCENTAGE_ALERT
|
|
end
|
|
if drop_perc == "0" then
|
|
drop_perc = ""
|
|
end
|
|
|
|
print("<tr><td><b>"..i18n("show_alerts.interface_drops_threshold").."</b><br>\n")
|
|
print("<small>"..i18n("show_alerts.interface_drops_threshold_descr").."</small>")
|
|
|
|
print("</td><td>\n")
|
|
print('<input type="number" class=\"text-right form-control\" name="packets_drops_perc" style="display:inline; width:7em;" placeholder="" min="0" max="100" value="')
|
|
print(tostring(drop_perc))
|
|
print[[" /> %]]
|
|
print("</td><td></td></tr>")
|
|
end
|
|
|
|
print [[
|
|
</tbody> </table>
|
|
<input type="hidden" name="SaveAlerts" value="">
|
|
|
|
<button class="btn btn-primary" style="float:right; margin-right:1em;" disabled="disabled" type="submit">]] print(i18n("save_configuration")) print[[</button>
|
|
</form>
|
|
|
|
<button class="btn btn-default" onclick="$('#deleteGlobalAlertConfig').modal('show');" style="float:right; margin-right:1em;"><i class="fa fa-trash" aria-hidden="true" data-original-title="" title=""></i> ]] print(i18n("show_alerts.delete_config_btn",{conf=firstToUpper(entity_type)})) print[[</button>
|
|
<button class="btn btn-default" onclick="$('#deleteAlertSourceSettings').modal('show');" style="float:right; margin-right:1em;"><i class="fa fa-trash" aria-hidden="true" data-original-title="" title=""></i> ]] print(delete_button_msg) print[[</button>
|
|
]]
|
|
|
|
print("<div style='margin-top:4em;'><b>" .. i18n("alerts_thresholds_config.notes") .. ":</b><ul>")
|
|
|
|
print("<li>" .. i18n("alerts_thresholds_config.note_control_threshold_checks_periods") .. "</li>")
|
|
print("<li>" .. i18n("alerts_thresholds_config.note_thresholds_expressed_as_delta") .. "</li>")
|
|
print("<li>" .. i18n("alerts_thresholds_config.note_consecutive_checks") .. "</li>")
|
|
|
|
if (entity_type == "host") then
|
|
print("<li>" .. i18n("alerts_thresholds_config.note_deltas_of_idle_host_become_active") .. "</li>")
|
|
print("<li>" .. i18n("alerts_thresholds_config.note_checks_on_active_hosts") .. "</li>")
|
|
print("<li>" .. i18n("alerts_thresholds_config.note_attacker_victime_threshold") .. "</li>")
|
|
end
|
|
print("</ul></div>")
|
|
|
|
print[[
|
|
<script>
|
|
function deleteAlertSourceSettings() {
|
|
var params = {};
|
|
|
|
params.to_delete = "local";
|
|
params.csrf = "]] print(ntop.getRandomCSRFValue()) print[[";
|
|
|
|
var form = paramsToForm('<form method="post"></form>', params);
|
|
form.appendTo('body').submit();
|
|
}
|
|
|
|
function deleteGlobalAlertConfig() {
|
|
var params = {};
|
|
|
|
params.to_delete = "global";
|
|
params.csrf = "]] print(ntop.getRandomCSRFValue()) print[[";
|
|
|
|
var form = paramsToForm('<form method="post"></form>', params);
|
|
form.appendTo('body').submit();
|
|
}
|
|
|
|
aysHandleForm("form", {
|
|
handle_tabs: true,
|
|
});
|
|
</script>
|
|
]]
|
|
end
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function housekeepingAlertsMakeRoom(ifId)
|
|
local prefs = ntop.getPrefs()
|
|
local max_num_alerts_per_entity = prefs.max_num_alerts_per_entity
|
|
local max_num_flow_alerts = prefs.max_num_flow_alerts
|
|
|
|
local k = get_make_room_keys(ifId)
|
|
|
|
if ntop.getCache(k["entities"]) == "1" then
|
|
ntop.delCache(k["entities"])
|
|
local res = interface.queryAlertsRaw(false,
|
|
"SELECT alert_entity, alert_entity_val, count(*) count",
|
|
"GROUP BY alert_entity, alert_entity_val HAVING COUNT >= "..max_num_alerts_per_entity)
|
|
|
|
for _, e in pairs(res) do
|
|
local to_keep = (max_num_alerts_per_entity * 0.8) -- deletes 20% more alerts than the maximum number
|
|
to_keep = round(to_keep, 0)
|
|
-- tprint({e=e, total=e.count, to_keep=to_keep, to_delete=to_delete, to_delete_not_discounted=(e.count - max_num_alerts_per_entity)})
|
|
local cleanup = interface.queryAlertsRaw(false,
|
|
"DELETE",
|
|
"WHERE rowid NOT IN (SELECT rowid FROM closed_alerts WHERE alert_entity="..e.alert_entity.." AND alert_entity_val=\""..e.alert_entity_val.."\""..
|
|
"ORDER BY alert_tstamp DESC LIMIT "..to_keep..")")
|
|
-- TODO: possibly raise a too many alerts for entity e
|
|
end
|
|
end
|
|
|
|
if ntop.getCache(k["flows"]) == "1" then
|
|
ntop.delCache(k["flows"])
|
|
local res = interface.queryFlowAlertsRaw("SELECT count(*) count", "WHERE 1=1")
|
|
local count = tonumber(res[1].count)
|
|
if count ~= nil and count >= max_num_flow_alerts then
|
|
local to_keep = (max_num_flow_alerts * 0.8)
|
|
to_keep = round(to_keep, 0)
|
|
local cleanup = interface.queryFlowAlertsRaw("DELETE",
|
|
"WHERE rowid NOT IN (SELECT rowid FROM flows_alerts ORDER BY alert_tstamp DESC LIMIT "..to_keep..")")
|
|
--tprint({total=count, to_delete=to_delete, cleanup=cleanup})
|
|
--tprint(cleanup)
|
|
-- TODO: possibly raise a too many flow alerts
|
|
end
|
|
end
|
|
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function drawAlertTables(num_past_alerts, num_engaged_alerts, num_flow_alerts, get_params, hide_extended_title, alt_nav_tabs)
|
|
local alert_items = {}
|
|
local url_params = {}
|
|
|
|
print(
|
|
template.gen("modal_confirm_dialog.html", {
|
|
dialog={
|
|
id = "delete_alert_dialog",
|
|
action = "deleteAlertById(delete_alert_id)",
|
|
title = i18n("show_alerts.delete_alert"),
|
|
message = i18n("show_alerts.confirm_delete_alert").."?",
|
|
confirm = i18n("delete"),
|
|
}
|
|
})
|
|
)
|
|
|
|
print(
|
|
template.gen("modal_confirm_dialog.html", {
|
|
dialog={
|
|
id = "myModal",
|
|
action = "checkModalDelete()",
|
|
title = "",
|
|
message = i18n("show_alerts.purge_subj_alerts_confirm", {subj = '<span id="modalDeleteContext"></span><span id="modalDeleteAlertsMsg"></span>'}),
|
|
confirm = i18n("show_alerts.purge_num_alerts", {
|
|
num_alerts = '<img id="alerts-summary-wait" src="'..ntop.getHttpPrefix()..'/img/loading.gif"/><span id="alerts-summary-body"></span>'
|
|
}),
|
|
}
|
|
})
|
|
)
|
|
|
|
for k,v in pairs(get_params) do if k ~= "csrf" then url_params[k] = v end end
|
|
if not alt_nav_tabs then
|
|
print[[
|
|
<br>
|
|
<ul class="nav nav-tabs" role="tablist" id="alert-tabs">
|
|
<!-- will be populated later with javascript -->
|
|
</ul>
|
|
]]
|
|
nav_tab_id = "alert-tabs"
|
|
else
|
|
nav_tab_id = alt_nav_tabs
|
|
end
|
|
|
|
print[[
|
|
<script>
|
|
|
|
function checkAlertActionsPanel() {
|
|
/* check if this tab is handled by this script */
|
|
if(getCurrentStatus() == "" || getCurrentStatus() == "engaged")
|
|
$("#alertsActionsPanel").css("display", "none");
|
|
else
|
|
$("#alertsActionsPanel").css("display", "");
|
|
}
|
|
|
|
function setActiveHashTab(hash) {
|
|
$('#]] print(nav_tab_id) --[[ see "clicked" below for the other part of this logic ]] print[[ a[href="' + hash + '"]').tab('show');
|
|
}
|
|
|
|
/* Handle the current tab */
|
|
$(function() {
|
|
$("ul.nav-tabs > li > a").on("shown.bs.tab", function(e) {
|
|
var id = $(e.target).attr("href").substr(1);
|
|
history.replaceState(null, null, "#"+id);
|
|
updateDeleteLabel(id);
|
|
checkAlertActionsPanel();
|
|
});
|
|
|
|
var hash = window.location.hash;
|
|
if (! hash && ]] if(isEmptyString(status) and not isEmptyString(_GET["tab"])) then print("true") else print("false") end print[[)
|
|
hash = "#]] print(_GET["tab"] or "") print[[";
|
|
|
|
if (hash)
|
|
setActiveHashTab(hash)
|
|
|
|
$(function() { checkAlertActionsPanel(); });
|
|
});
|
|
|
|
function getActiveTabId() {
|
|
return $("#]] print(nav_tab_id) print[[ > li.active > a").attr('href').substr(1);
|
|
}
|
|
|
|
function updateDeleteLabel(tabid) {
|
|
var label = $("#purgeBtnLabel");
|
|
var prefix = "]]
|
|
if not isEmptyString(_GET["entity"]) then print(alertEntityLabel(_GET["entity"], true).." ") end
|
|
print [[";
|
|
var val = "";
|
|
|
|
if (tabid == "tab-table-engaged-alerts")
|
|
val = "]] print(i18n("show_alerts.engaged")) print[[ ";
|
|
else if (tabid == "tab-table-alerts-history")
|
|
val = "]] print(i18n("show_alerts.past")) print[[ ";
|
|
else if (tabid == "tab-table-flow-alerts-history")
|
|
val = "]] print(i18n("show_alerts.past_flow")) print[[ ";
|
|
|
|
label.html(prefix + val);
|
|
}
|
|
|
|
function getCurrentStatus() {
|
|
var tabid = getActiveTabId();
|
|
|
|
if (tabid == "tab-table-engaged-alerts")
|
|
val = "engaged";
|
|
else if (tabid == "tab-table-alerts-history")
|
|
val = "historical";
|
|
else if (tabid == "tab-table-flow-alerts-history")
|
|
val = "historical-flows";
|
|
else
|
|
val = "";
|
|
|
|
return val;
|
|
}
|
|
</script>
|
|
]]
|
|
if not alt_nav_tabs then print [[<div class="tab-content">]] end
|
|
|
|
local status = _GET["status"]
|
|
local status_reset = (status == nil)
|
|
|
|
if num_engaged_alerts > 0 then
|
|
alert_items[#alert_items + 1] = {["label"] = i18n("show_alerts.engaged_alerts"),
|
|
["div-id"] = "table-engaged-alerts", ["status"] = "engaged"}
|
|
elseif status == "engaged" then
|
|
status = nil; status_reset = 1
|
|
end
|
|
|
|
if num_past_alerts > 0 then
|
|
alert_items[#alert_items +1] = {["label"] = i18n("show_alerts.past_alerts"),
|
|
["div-id"] = "table-alerts-history", ["status"] = "historical"}
|
|
elseif status == "historical" then
|
|
status = nil; status_reset = 1
|
|
end
|
|
|
|
if num_flow_alerts > 0 then
|
|
alert_items[#alert_items +1] = {["label"] = i18n("show_alerts.flow_alerts"),
|
|
["div-id"] = "table-flow-alerts-history", ["status"] = "historical-flows"}
|
|
elseif status == "historical-flows" then
|
|
status = nil; status_reset = 1
|
|
end
|
|
|
|
for k, t in ipairs(alert_items) do
|
|
local clicked = "0"
|
|
if((not alt_nav_tabs) and ((k == 1 and status == nil) or (status ~= nil and status == t["status"]))) then
|
|
clicked = "1"
|
|
end
|
|
print [[
|
|
<div class="tab-pane fade in" id="tab-]] print(t["div-id"]) print[[">
|
|
<div id="]] print(t["div-id"]) print[["></div>
|
|
</div>
|
|
|
|
<script type="text/javascript">
|
|
function deleteAlertById(alert_id) {
|
|
var params = {};
|
|
params.id_to_delete = alert_id;
|
|
params.status = getCurrentStatus();
|
|
params.csrf = "]] print(ntop.getRandomCSRFValue()) print[[";
|
|
|
|
var form = paramsToForm('<form method="post"></form>', params);
|
|
form.appendTo('body').submit();
|
|
}
|
|
|
|
$("#]] print(nav_tab_id) print[[").append('<li><a href="#tab-]] print(t["div-id"]) print[[" clicked="]] print(clicked) print[[" role="tab" data-toggle="tab">]] print(t["label"]) print[[</a></li>')
|
|
|
|
$('a[href="#tab-]] print(t["div-id"]) print[["]').on('shown.bs.tab', function (e) {
|
|
// append the li to the tabs
|
|
|
|
$("#]] print(t["div-id"]) print[[").datatable({
|
|
url: "]] print(ntop.getHttpPrefix()) print [[/lua/get_alerts_data.lua?" + $.param(]] print(tableToJsObject(getTabParameters(url_params, t["status"]))) print [[),
|
|
showFilter: true,
|
|
showPagination: true,
|
|
buttons: [']]
|
|
|
|
local title = t["label"]
|
|
|
|
-- TODO this condition should be removed and page integration support implemented
|
|
if((isEmptyString(_GET["entity"])) and isEmptyString(_GET["epoch_begin"]) and isEmptyString(_GET["epoch_end"])) then
|
|
-- alert_consts.alert_severity_keys and alert_consts.alert_type_keys are defined in lua_utils
|
|
local alert_severities = {}
|
|
for _, s in pairs(alert_consts.alert_severity_keys) do alert_severities[#alert_severities +1 ] = s[3] end
|
|
local alert_types = {}
|
|
for _, s in pairs(alert_consts.alert_type_keys) do alert_types[#alert_types +1 ] = s[3] end
|
|
|
|
local a_type, a_severity = nil, nil
|
|
if clicked == "1" then
|
|
if tonumber(_GET["alert_type"]) ~= nil then a_type = alertTypeLabel(_GET["alert_type"], true) end
|
|
if tonumber(_GET["alert_severity"]) ~= nil then a_severity = alertSeverityLabel(_GET["alert_severity"], true) end
|
|
end
|
|
|
|
print(drawDropdown(t["status"], "type", a_type, alert_types, i18n("alerts_dashboard.alert_type")))
|
|
print(drawDropdown(t["status"], "severity", a_severity, alert_severities, i18n("alerts_dashboard.alert_severity")))
|
|
elseif((not isEmptyString(_GET["entity_val"])) and (not hide_extended_title)) then
|
|
if entity == "host" then
|
|
title = title .. " - " .. firstToUpper(formatAlertEntity(getInterfaceId(ifname), entity, _GET["entity_val"], nil))
|
|
end
|
|
end
|
|
|
|
print[['],
|
|
/*
|
|
buttons: ['<div class="btn-group"><button class="btn btn-link dropdown-toggle" data-toggle="dropdown">Severity<span class="caret"></span></button><ul class="dropdown-menu" role="menu"><li>test severity</li></ul></div><div class="btn-group"><button class="btn btn-link dropdown-toggle" data-toggle="dropdown">Type<span class="caret"></span></button><ul class="dropdown-menu" role="menu"><li>test type</li></ul></div>'],
|
|
*/
|
|
]]
|
|
|
|
if(_GET["currentPage"] ~= nil and _GET["status"] == t["status"]) then
|
|
print("currentPage: ".._GET["currentPage"]..",\n")
|
|
end
|
|
if(_GET["perPage"] ~= nil and _GET["status"] == t["status"]) then
|
|
print("perPage: ".._GET["perPage"]..",\n")
|
|
end
|
|
print ('sort: [ ["' .. getDefaultTableSort("alerts") ..'","' .. getDefaultTableSortOrder("alerts").. '"] ],\n')
|
|
print [[
|
|
title: "]] print(title) print[[",
|
|
columns: [
|
|
{
|
|
title: "]]print(i18n("show_alerts.alert_datetime"))print[[",
|
|
field: "column_date",
|
|
sortable: true,
|
|
css: {
|
|
textAlign: 'center',
|
|
whiteSpace: 'nowrap',
|
|
}
|
|
},
|
|
|
|
{
|
|
title: "]]print(i18n("show_alerts.alert_duration"))print[[",
|
|
field: "column_duration",
|
|
sortable: true,
|
|
]]
|
|
|
|
if t["status"] == "historical-flows" then
|
|
print("hidden: true,")
|
|
end
|
|
|
|
print[[
|
|
css: {
|
|
textAlign: 'center',
|
|
whiteSpace: 'nowrap',
|
|
}
|
|
},
|
|
|
|
{
|
|
title: "]]print(i18n("show_alerts.alert_severity"))print[[",
|
|
field: "column_severity",
|
|
sortable: true,
|
|
css: {
|
|
textAlign: 'center'
|
|
}
|
|
},
|
|
|
|
{
|
|
title: "]]print(i18n("show_alerts.alert_type"))print[[",
|
|
field: "column_type",
|
|
sortable: true,
|
|
css: {
|
|
textAlign: 'center',
|
|
whiteSpace: 'nowrap',
|
|
}
|
|
},
|
|
|
|
{
|
|
title: "]]print(i18n("show_alerts.alert_description"))print[[",
|
|
field: "column_msg",
|
|
css: {
|
|
textAlign: 'left',
|
|
}
|
|
},
|
|
|
|
{
|
|
field: "column_key",
|
|
hidden: true
|
|
},
|
|
|
|
{
|
|
title: "]]print(i18n("show_alerts.alert_actions")) print[[",
|
|
]]
|
|
if t["status"] == "engaged" then
|
|
print("hidden: true,")
|
|
end
|
|
print[[
|
|
css: {
|
|
textAlign: 'center',
|
|
}
|
|
}
|
|
], tableCallback: function() {
|
|
datatableForEachRow("#]] print(t["div-id"]) print[[", function(row_id) {
|
|
var alert_key = $("td:nth(5)", this).html().split("|");
|
|
var alert_id = alert_key[0];
|
|
var historical_url = alert_key[1];
|
|
|
|
if (typeof(historical_url) === "string")
|
|
datatableAddLinkButtonCallback.bind(this)(7, historical_url, "]] print(i18n("show_alerts.explorer")) print[[");
|
|
datatableAddDeleteButtonCallback.bind(this)(7, "delete_alert_id ='" + alert_id + "'; $('#delete_alert_dialog').modal('show');", "]] print(i18n('delete')) print[[");
|
|
|
|
$("form", this).submit(function() {
|
|
// add "status" parameter to the form
|
|
var get_params = paramsExtend(]] print(tableToJsObject(getTabParameters(url_params, nil))) print[[, {status:getCurrentStatus()});
|
|
$(this).attr("action", "?" + $.param(get_params));
|
|
|
|
return true;
|
|
});
|
|
});
|
|
}
|
|
});
|
|
});
|
|
]]
|
|
if (clicked == "1") then
|
|
print[[
|
|
// must wait for modalDeleteAlertsStatus to be created
|
|
$(function() {
|
|
var status_reset = ]] print(tostring(status_reset)) --[[ this is necessary because of status parameter inconsistency after tab switch ]] print[[;
|
|
var tabid;
|
|
|
|
if ((status_reset) || (getCurrentStatus() == "")) {
|
|
tabid = "]] print("tab-"..t["div-id"]) print[[";
|
|
history.replaceState(null, null, "#"+tabid);
|
|
} else {
|
|
tabid = getActiveTabId();
|
|
}
|
|
|
|
updateDeleteLabel(tabid);
|
|
});
|
|
]]
|
|
end
|
|
print[[
|
|
</script>
|
|
]]
|
|
|
|
end
|
|
|
|
local zoom_vals = {
|
|
{ i18n("show_alerts.5_min"), 5*60*1, i18n("show_alerts.older_5_minutes_ago") },
|
|
{ i18n("show_alerts.30_min"), 30*60*1, i18n("show_alerts.older_30_minutes_ago") },
|
|
{ i18n("show_alerts.1_hour"), 60*60*1, i18n("show_alerts.older_1_hour_ago") },
|
|
{ i18n("show_alerts.1_day"), 60*60*24, i18n("show_alerts.older_1_day_ago") },
|
|
{ i18n("show_alerts.1_week"), 60*60*24*7, i18n("show_alerts.older_1_week_ago") },
|
|
{ i18n("show_alerts.1_month"), 60*60*24*31, i18n("show_alerts.older_1_month_ago") },
|
|
{ i18n("show_alerts.6_months"), 60*60*24*31*6, i18n("show_alerts.older_6_months_ago") },
|
|
{ i18n("show_alerts.1_year"), 60*60*24*366 , i18n("show_alerts.older_1_year_ago") }
|
|
}
|
|
|
|
if (num_past_alerts > 0 or num_flow_alerts > 0 or num_engaged_alerts > 0) then
|
|
-- trigger the click on the right tab to force table load
|
|
print[[
|
|
<script type="text/javascript">
|
|
$("[clicked=1]").trigger("click");
|
|
</script>
|
|
]]
|
|
|
|
if not alt_nav_tabs then print [[</div> <!-- closes tab-content -->]] end
|
|
local has_fixed_period = ((not isEmptyString(_GET["epoch_begin"])) or (not isEmptyString(_GET["epoch_end"])))
|
|
|
|
print('<div id="alertsActionsPanel">')
|
|
print('<br>' .. i18n("show_alerts.alerts_to_purge") .. ': ')
|
|
print[[<select id="deleteZoomSelector" class="form-control" style="display:]] if has_fixed_period then print("none") else print("inline") end print[[; width:14em; margin:0 1em;">]]
|
|
local all_msg = ""
|
|
|
|
if not has_fixed_period then
|
|
print('<optgroup label="' .. i18n("show_alerts.older_than") .. '">')
|
|
for k,v in ipairs(zoom_vals) do
|
|
print('<option data-older="'..(os.time() - zoom_vals[k][2])..'" data-msg="'.." "..zoom_vals[k][3].. '">'..zoom_vals[k][1]..'</option>\n')
|
|
end
|
|
print('</optgroup>')
|
|
else
|
|
all_msg = " " .. i18n("show_alerts.in_the_selected_time_frame")
|
|
end
|
|
|
|
print('<option selected="selected" data-older="0" data-msg="') print(all_msg) print('">' .. i18n("all") .. '</option>\n')
|
|
|
|
|
|
print[[</select>
|
|
<form id="modalDeleteForm" class="form-inline" style="display:none;" method="post" onsubmit="return checkModalDelete();">
|
|
<input type="hidden" id="modalDeleteAlertsOlderThan" value="-1" />
|
|
<input id="csrf" name="csrf" type="hidden" value="]] print(ntop.getRandomCSRFValue()) print[[" />
|
|
</form>
|
|
]]
|
|
|
|
-- we need to dynamically modify parameters at js-time because we switch tab
|
|
local delete_params = getTabParameters(url_params, nil)
|
|
delete_params.epoch_end = -1
|
|
|
|
print[[<button id="buttonOpenDeleteModal" data-toggle="modal" data-target="#myModal" class="btn btn-default"><i type="submit" class="fa fa-trash-o"></i> <span id="purgeBtnMessage">]]
|
|
print(i18n("show_alerts.purge_subj_alerts", {subj='<span id="purgeBtnLabel"></span>'}))
|
|
print[[</span></button>
|
|
</div> <!-- closes alertsActionsPanel -->
|
|
|
|
<script>
|
|
|
|
paramsToForm('#modalDeleteForm', ]] print(tableToJsObject(delete_params)) print[[);
|
|
|
|
function getTabSpecificParams() {
|
|
var tab_specific = {status:getCurrentStatus()};
|
|
var period_end = $('#modalDeleteAlertsOlderThan').val();
|
|
if (parseInt(period_end) > 0)
|
|
tab_specific.epoch_end = period_end;
|
|
|
|
if (tab_specific.status == "]] print(_GET["status"]) print[[") {
|
|
tab_specific.alert_severity = ]] if tonumber(_GET["alert_severity"]) ~= nil then print(_GET["alert_severity"]) else print('""') end print[[;
|
|
tab_specific.alert_type = ]] if tonumber(_GET["alert_type"]) ~= nil then print(_GET["alert_type"]) else print('""') end print[[;
|
|
}
|
|
|
|
// merge the general parameters to the tab specific ones
|
|
return paramsExtend(]] print(tableToJsObject(getTabParameters(url_params, nil))) print[[, tab_specific);
|
|
}
|
|
|
|
function checkModalDelete() {
|
|
var get_params = getTabSpecificParams();
|
|
var post_params = {};
|
|
post_params.csrf = "]] print(ntop.getRandomCSRFValue()) print[[";
|
|
post_params.id_to_delete = "__all__";
|
|
|
|
// this actually performs the request
|
|
var form = paramsToForm('<form method="post"></form>', post_params);
|
|
form.attr("action", "?" + $.param(get_params));
|
|
form.appendTo('body').submit();
|
|
return false;
|
|
}
|
|
|
|
var cur_alert_num_req = null;
|
|
|
|
/* This acts before shown.bs.modal event, avoiding visual fields substitution glitch */
|
|
$('#buttonOpenDeleteModal').on('click', function() {
|
|
var lb = $("#purgeBtnLabel");
|
|
var zoomsel = $("#deleteZoomSelector").find(":selected");
|
|
$("#myModal h3").html($("#purgeBtnMessage").html());
|
|
|
|
$(".modal-body #modalDeleteAlertsMsg").html(zoomsel.data('msg') + ']]
|
|
if tonumber(_GET["alert_severity"]) ~= nil then
|
|
print(' with severity "'..alertSeverityLabel(_GET["alert_severity"], true)..'" ')
|
|
elseif tonumber(_GET["alert_type"]) ~= nil then
|
|
print(' with type "'..alertTypeLabel(_GET["alert_type"], true)..'" ')
|
|
end
|
|
print[[');
|
|
if (lb.length == 1)
|
|
$(".modal-body #modalDeleteContext").html(" " + lb.html());
|
|
|
|
$('#modalDeleteAlertsOlderThan').val(zoomsel.data('older'));
|
|
|
|
cur_alert_num_req = $.ajax({
|
|
type: 'GET',
|
|
]] print("url: '"..ntop.getHttpPrefix().."/lua/get_num_alerts.lua'") print[[,
|
|
data: getTabSpecificParams(),
|
|
complete: function() {
|
|
$("#alerts-summary-wait").hide();
|
|
}, error: function() {
|
|
$("#alerts-summary-body").html("?");
|
|
}, success: function(count){
|
|
$("#alerts-summary-body").html(count);
|
|
if (count == 0)
|
|
$('#myModal button[type="submit"]').attr("disabled", "disabled");
|
|
}
|
|
});
|
|
});
|
|
|
|
$('#myModal').on('hidden.bs.modal', function () {
|
|
if(cur_alert_num_req) {
|
|
cur_alert_num_req.abort();
|
|
cur_alert_num_req = null;
|
|
}
|
|
|
|
$("#alerts-summary-wait").show();
|
|
$("#alerts-summary-body").html("");
|
|
$('#myModal button[type="submit"]').removeAttr("disabled");
|
|
})
|
|
</script>]]
|
|
end
|
|
|
|
end
|
|
|
|
-- #################################
|
|
|
|
-- Check for checkpoint expiration. This could occurr, for example, if the
|
|
-- user disables then re-enables alerts
|
|
local function checkpointExpired(checkpoint, working_status)
|
|
local tdiff = working_status.now - checkpoint.timestamp
|
|
|
|
return tdiff > 1.9 * working_status.interval
|
|
end
|
|
|
|
-- #################################
|
|
|
|
local function getEngagedAlertsCacheKey(ifid, granularity)
|
|
return "ntopng.cache.engaged_alerts_cache_ifid_"..ifid.."_".. granularity
|
|
end
|
|
|
|
local function getConfiguredAlertsThresholds(ifname, granularity)
|
|
local thresholds_key = get_alerts_hash_name(granularity, ifname)
|
|
local thresholds_config = {}
|
|
local res = {}
|
|
|
|
-- Handle the global configuration
|
|
local global_conf_keys = ntop.getKeysCache(getGlobalAlertsConfigurationHash(granularity, "*", "*")) or {}
|
|
|
|
for alert_key in pairs(global_conf_keys) do
|
|
local thresholds_str = ntop.getHashCache(alert_key, global_redis_thresholds_key)
|
|
|
|
if not isEmptyString(thresholds_str) then
|
|
-- extract only the last part of the key
|
|
local k = string.sub(alert_key, string.find(alert_key, "%.[^%.]*$")+1)
|
|
thresholds_config[k] = thresholds_str
|
|
end
|
|
end
|
|
|
|
for entity_val, thresholds_str in pairs(table.merge(thresholds_config, ntop.getHashAllCache(thresholds_key) or {})) do
|
|
local thresholds = split(thresholds_str, ",")
|
|
res[entity_val] = {}
|
|
|
|
for _, threshold in pairs(thresholds) do
|
|
local parts = string.split(threshold, ";")
|
|
if #parts == 3 then
|
|
local alert_key = granularity .. "_" .. parts[1] -- the alert key is the concatenation of the granularity and the metric
|
|
res[entity_val][parts[1]] = {metric=parts[1], operator=parts[2], edge=parts[3], key=alert_key}
|
|
end
|
|
end
|
|
end
|
|
|
|
return res
|
|
end
|
|
|
|
-- #################################
|
|
|
|
-- Extracts the configured thresholds for the entity, global and local
|
|
local function getEntityThresholds(configured_thresholds, entity_type, entity)
|
|
local res = {}
|
|
local global_conf_key = get_global_alerts_hash_key(entity_type, entity)
|
|
|
|
if configured_thresholds[global_conf_key] ~= nil then
|
|
-- Global configuration exists
|
|
for k, v in pairs(configured_thresholds[global_conf_key]) do
|
|
res[k] = v
|
|
end
|
|
end
|
|
|
|
-- Possibly override global thresholds with local configured ones
|
|
if configured_thresholds[entity] ~= nil then
|
|
for k, v in pairs(configured_thresholds[entity]) do
|
|
res[k] = v
|
|
end
|
|
end
|
|
|
|
return res
|
|
end
|
|
|
|
-- #################################
|
|
|
|
local function formatThresholdCross(ifid, engine, entity_type, entity_value, entity_info, alert_key, threshold_info)
|
|
if threshold_info.metric then
|
|
local info = alert_consts.alert_functions_info[threshold_info.metric]
|
|
local label = info and string.lower(info.label) or threshold_info.metric
|
|
local value = info and info.fmt(threshold_info.value) or threshold_info.value
|
|
local edge = info and info.fmt(threshold_info.edge) or threshold_info.edge
|
|
|
|
return alertEngineLabel(engine).." <b>".. label .."</b> crossed by "..formatAlertEntity(ifid, entity_type, entity_value, entity_info)..
|
|
" ["..value.." &"..(threshold_info.operator).."; "..edge.."]"
|
|
end
|
|
|
|
return ""
|
|
end
|
|
|
|
local function formatSynFlood(ifid, engine, entity_type, entity_value, entity_info, alert_key, alert_info)
|
|
if entity_info.anomalies ~= nil then
|
|
if (alert_key == "syn_flood_attacker") and (entity_info.anomalies.syn_flood_attacker ~= nil) then
|
|
local anomaly_info = entity_info.anomalies.syn_flood_attacker
|
|
|
|
return firstToUpper(formatAlertEntity(ifid, entity_type, entity_value, entity_info)).." is a SYN Flooder ("..
|
|
(anomaly_info.last_trespassed_hits).." SYN sent in "..secondsToTime(anomaly_info.over_threshold_duration_sec)..")"
|
|
elseif (alert_key == "syn_flood_victim") and (entity_info.anomalies.syn_flood_victim ~= nil) then
|
|
local anomaly_info = entity_info.anomalies.syn_flood_victim
|
|
|
|
return firstToUpper(formatAlertEntity(ifid, entity_type, entity_value, entity_info)).." is under SYN flood attack ("..
|
|
(anomaly_info.last_trespassed_hits).." SYN received in "..secondsToTime(anomaly_info.over_threshold_duration_sec)..")"
|
|
end
|
|
end
|
|
|
|
return ""
|
|
end
|
|
|
|
local function formatFlowsFlood(ifid, engine, entity_type, entity_value, entity_info, alert_key, alert_info)
|
|
if entity_info.anomalies ~= nil then
|
|
if (alert_key == "flows_flood_attacker") and (entity_info.anomalies.flows_flood_attacker) then
|
|
local anomaly_info = entity_info.anomalies.flows_flood_attacker
|
|
return firstToUpper(formatAlertEntity(ifid, entity_type, entity_value, entity_info)).." is a Flooder ("..
|
|
(anomaly_info.last_trespassed_hits).." flows sent in "..secondsToTime(anomaly_info.over_threshold_duration_sec)..")"
|
|
elseif (alert_key == "flows_flood_victim") and (entity_info.anomalies.flows_flood_victim) then
|
|
local anomaly_info = entity_info.anomalies.flows_flood_victim
|
|
return firstToUpper(formatAlertEntity(ifid, entity_type, entity_value, entity_info)).." is under flood attack ("..
|
|
(anomaly_info.last_trespassed_hits).." flows received in "..secondsToTime(anomaly_info.over_threshold_duration_sec)..")"
|
|
end
|
|
end
|
|
|
|
return ""
|
|
end
|
|
|
|
local function formatMisconfiguredApp(ifid, engine, entity_type, entity_value, entity_info, alert_key, alert_info)
|
|
if entity_info.anomalies ~= nil then
|
|
if alert_key == "too_many_flows" then
|
|
return firstToUpper(formatAlertEntity(ifid, entity_type, entity_value, entity_info))..
|
|
" has too many flows. Please extend the --max-num-flows/-X command line option"
|
|
elseif alert_key == "too_many_hosts" then
|
|
return firstToUpper(formatAlertEntity(ifid, entity_type, entity_value, entity_info))..
|
|
" has too many hosts. Please extend the --max-num-hosts/-x command line option"
|
|
end
|
|
end
|
|
|
|
return ""
|
|
end
|
|
|
|
local function formatTooManyPacketDrops(ifid, engine, entity_type, entity_value, entity_info, alert_key, alert_info)
|
|
local max_drop_perc = ntop.getPref(getInterfacePacketDropPercAlertKey(getInterfaceName(ifid)))
|
|
if isEmptyString(max_drop_perc) then
|
|
max_drop_perc = CONST_DEFAULT_PACKETS_DROP_PERCENTAGE_ALERT
|
|
end
|
|
|
|
return firstToUpper(formatAlertEntity(ifid, entity_type, entity_value, entity_info))..
|
|
" has too many dropped packets [> " .. max_drop_perc .. "%]"
|
|
end
|
|
|
|
-- returns the pair (message, severity)
|
|
local function formatAlertMessage(ifid, engine, entity_type, entity_value, atype, akey, entity_info, alert_info)
|
|
-- Defaults
|
|
local msg = ""
|
|
local severity = "error"
|
|
|
|
if atype == "threshold_cross" then
|
|
msg = formatThresholdCross(ifid, engine, entity_type, entity_value, entity_info, akey, alert_info)
|
|
elseif atype == "tcp_syn_flood" then
|
|
msg = formatSynFlood(ifid, engine, entity_type, entity_value, entity_info, akey, alert_info)
|
|
elseif atype == "flows_flood" then
|
|
msg = formatFlowsFlood(ifid, engine, entity_type, entity_value, entity_info, akey, alert_info)
|
|
elseif atype == "misconfigured_app" then
|
|
msg = formatMisconfiguredApp(ifid, engine, entity_type, entity_value, entity_info, akey, alert_info)
|
|
elseif atype == "too_many_drops" then
|
|
msg = formatTooManyPacketDrops(ifid, engine, entity_type, entity_value, entity_info, akey, alert_info)
|
|
end
|
|
|
|
return msg, severity
|
|
end
|
|
|
|
local function engageReleaseAlert(engaged, ifid, engine, entity_type, entity_value, atype, alert_key, entity_info, alert_info, force)
|
|
local alert_msg, aseverity = formatAlertMessage(ifid, engine, entity_type, entity_value, atype, alert_key, entity_info, alert_info)
|
|
local alert_type = alertType(atype)
|
|
local alert_severity = alertSeverity(aseverity)
|
|
|
|
if engaged then
|
|
return interface.engageAlert(engine, alertEntity(entity_type), entity_value, alert_key, alert_type, alert_severity, alert_msg, force)
|
|
else
|
|
return interface.releaseAlert(engine, alertEntity(entity_type), entity_value, alert_key, alert_type, alert_severity, alert_msg, force)
|
|
end
|
|
end
|
|
|
|
local function engageAlert(ifid, engine, entity_type, entity_value, atype, akey, entity_info, alert_info, force)
|
|
if(verbose) then io.write("Engage Alert: "..entity_value.." "..atype.." "..akey.."\n") end
|
|
|
|
engageReleaseAlert(true, ifid, engine, entity_type, entity_value, atype, akey, entity_info, alert_info, force)
|
|
end
|
|
|
|
local function releaseAlert(ifid, engine, entity_type, entity_value, atype, akey, entity_info, alert_info, force)
|
|
if(verbose) then io.write("Release Alert: "..entity_value.." "..atype.." "..akey.."\n") end
|
|
|
|
engageReleaseAlert(false, ifid, engine, entity_type, entity_value, atype, akey, entity_info, alert_info, force)
|
|
end
|
|
|
|
local function getEngagedAlertsCache(ifid, granularity)
|
|
local engaged_cache = ntop.getCache(getEngagedAlertsCacheKey(ifid, granularity))
|
|
|
|
if isEmptyString(engaged_cache) then
|
|
engaged_cache = {}
|
|
local sql_res = performAlertsQuery("select *", "engaged", {alert_engine = alertEngine(granularity)}) or {}
|
|
|
|
if verbose then
|
|
io.write("Resync alert cache:\n")
|
|
tprint(sql_res)
|
|
end
|
|
|
|
for _, res in pairs(sql_res) do
|
|
local entity_type = alertEntityRaw(res.alert_entity)
|
|
local entity_value = res.alert_entity_val
|
|
local atype = alertTypeRaw(res.alert_type)
|
|
local akey = res.alert_id
|
|
|
|
engaged_cache[entity_type] = engaged_cache[entity_type] or {}
|
|
engaged_cache[entity_type][entity_value] = engaged_cache[entity_type][entity_value] or {}
|
|
engaged_cache[entity_type][entity_value][akey] = engaged_cache[entity_type][entity_value][akey] or {}
|
|
engaged_cache[entity_type][entity_value][atype] = engaged_cache[entity_type][entity_value][atype] or {}
|
|
engaged_cache[entity_type][entity_value][atype][akey] = true
|
|
end
|
|
|
|
if ntop.getPref("ntopng.prefs.disable_alerts_generation") ~= "1" then
|
|
ntop.setCache(getEngagedAlertsCacheKey(ifid, granularity), j.encode(engaged_cache))
|
|
end
|
|
else
|
|
engaged_cache = j.decode(engaged_cache, 1, nil)
|
|
end
|
|
|
|
return engaged_cache
|
|
end
|
|
|
|
function invalidateEngagedAlertsCache(ifid)
|
|
local keys = ntop.getKeysCache(getEngagedAlertsCacheKey(ifid, "*")) or {}
|
|
|
|
for key in pairs(keys) do
|
|
ntop.delCache(key)
|
|
end
|
|
|
|
if(verbose) then io.write("Engaged Alerts Cache invalidated\n") end
|
|
end
|
|
|
|
-- #################################
|
|
|
|
local function check_entity_alerts(ifid, entity_type, entity_value, working_status, old_entity_info, entity_info)
|
|
if are_alerts_suppressed(entity_value, ifid) then return end
|
|
|
|
local engine = working_status.engine
|
|
local granularity = working_status.granularity
|
|
local engaged_cache = working_status.engaged_cache
|
|
local current_alerts = {}
|
|
local past_alert_info = {}
|
|
local invalidate = false
|
|
|
|
local function addAlertInfo(info_arr, atype, akey, alert_info)
|
|
info_arr[atype] = info_arr[atype] or {}
|
|
info_arr[atype][akey] = alert_info or {}
|
|
end
|
|
|
|
local function getAnomalyType(anomal_name)
|
|
if starts(anomal_name, "syn_flood") then
|
|
return "tcp_syn_flood"
|
|
elseif starts(anomal_name, "flows_flood") then
|
|
return "flows_flood"
|
|
elseif anomal_name == "too_many_drops" then
|
|
return "too_many_drops"
|
|
elseif starts(anomal_name, "too_many_") then
|
|
return "misconfigured_app"
|
|
end
|
|
|
|
return nil
|
|
end
|
|
|
|
if granularity == "min" then
|
|
-- Populate current_alerts with anomalies
|
|
for anomal_name, anomaly in pairs(entity_info.anomalies or {}) do
|
|
local anomal_type = getAnomalyType(anomal_name)
|
|
|
|
if not isEmptyString(anomal_type) then
|
|
addAlertInfo(current_alerts, anomal_type, anomal_name, anomaly)
|
|
else
|
|
-- default anomaly - empty alert key
|
|
addAlertInfo(current_alerts, anomal_name, "", anomaly)
|
|
end
|
|
end
|
|
end
|
|
|
|
-- Populate current_alerts with threshold crosses
|
|
for _, threshold in pairs(getEntityThresholds(working_status.configured_thresholds, entity_type, entity_value)) do
|
|
local atype = "threshold_cross"
|
|
local akey = threshold.key
|
|
local exceeded, alert_info = entity_threshold_crossed(granularity, old_entity_info, entity_info, threshold)
|
|
|
|
if exceeded then
|
|
addAlertInfo(current_alerts, atype, akey, alert_info)
|
|
else
|
|
-- save past alert information
|
|
addAlertInfo(past_alert_info, atype, akey, alert_info)
|
|
end
|
|
end
|
|
|
|
-- Engage logic
|
|
for atype, akeys in pairs(current_alerts) do
|
|
for akey, alert_info in pairs(akeys) do
|
|
if ((engaged_cache[entity_type] == nil)
|
|
or (engaged_cache[entity_type][entity_value] == nil)
|
|
or (engaged_cache[entity_type][entity_value][atype] == nil)
|
|
or (engaged_cache[entity_type][entity_value][atype][akey] == nil)) then
|
|
engageAlert(ifid, engine, entity_type, entity_value, atype, akey, entity_info, alert_info)
|
|
working_status.dirty_cache = true
|
|
end
|
|
end
|
|
end
|
|
|
|
-- Release logic
|
|
if (engaged_cache[entity_type] ~= nil) and (engaged_cache[entity_type][entity_value] ~= nil) then
|
|
for atype, akeys in pairs(engaged_cache[entity_type][entity_value]) do
|
|
for akey, _ in pairs(akeys) do
|
|
-- mark the alert as processed
|
|
engaged_cache[entity_type][entity_value][atype][akey] = "processed"
|
|
|
|
if (current_alerts[atype] == nil) or (current_alerts[atype][akey] == nil) then
|
|
local alert_info
|
|
|
|
if (past_alert_info[atype] ~= nil) and (past_alert_info[atype][akey] ~= nil) then
|
|
alert_info = past_alert_info[atype][akey]
|
|
else
|
|
alert_info = {}
|
|
end
|
|
|
|
releaseAlert(ifid, engine, entity_type, entity_value, atype, akey, entity_info, alert_info)
|
|
working_status.dirty_cache = true
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function check_interface_alerts(ifid, working_status)
|
|
local ifstats = interface.getStats()
|
|
local entity_value = "iface_"..ifid
|
|
|
|
-- note: always checkpoint as the interface could have anomalies
|
|
|
|
local checkpoints = interface.checkpointInterface(ifid, working_status.checkpoint_id, "high") or {}
|
|
local old_entity_info = checkpoints["previous"] and j.decode(checkpoints["previous"])
|
|
local new_entity_info = checkpoints["current"] and j.decode(checkpoints["current"])
|
|
|
|
-- attach anomalies to the new entity info (no need to attach them to the old)
|
|
if new_entity_info ~= nil then
|
|
new_entity_info["anomalies"] = ifstats["anomalies"] or {}
|
|
end
|
|
|
|
if new_entity_info == nil then
|
|
if warning_shown == false then
|
|
print("["..__FILE__().."]:["..__LINE__().."] Unexpected new_entity_info == nil")
|
|
tprint({
|
|
old_entity_info = old_entity_info,
|
|
granularity = working_status.granularity,
|
|
entity_value = entity_value,
|
|
ifname=getInterfaceName(ifid)})
|
|
end
|
|
return
|
|
end
|
|
|
|
if (old_entity_info ~= nil) and (old_entity_info.stats ~= nil)
|
|
and (old_entity_info.stats.bytes ~= nil)
|
|
and not checkpointExpired(old_entity_info, working_status) then
|
|
-- wrap check
|
|
if old_entity_info.stats.bytes > ifstats.stats.bytes then
|
|
-- reset
|
|
if(verbose) then print("entity '"..entity_value.."' stats reset("..working_status.granularity..")") end
|
|
old_entity_info = nil
|
|
end
|
|
else
|
|
-- reset
|
|
old_entity_info = nil
|
|
end
|
|
|
|
check_entity_alerts(ifid, "interface", entity_value, working_status, old_entity_info, new_entity_info)
|
|
end
|
|
|
|
function check_networks_alerts(ifid, working_status)
|
|
local subnet_stats = interface.getNetworksStats()
|
|
local warning_shown = false
|
|
|
|
for subnet, sstats in pairs(subnet_stats) do
|
|
local entity_value = subnet
|
|
|
|
if (working_status.configured_thresholds[subnet] == nil)
|
|
and (working_status.configured_thresholds["local_networks"] == nil) then
|
|
-- no threshold configured, no need to checkpoint
|
|
goto continue
|
|
end
|
|
|
|
local checkpoints = interface.checkpointNetwork(ifid, tonumber(sstats.network_id), working_status.checkpoint_id, "high") or {}
|
|
|
|
local old_entity_info = checkpoints["previous"] and j.decode(checkpoints["previous"])
|
|
local new_entity_info = checkpoints["current"] and j.decode(checkpoints["current"])
|
|
|
|
if new_entity_info == nil then
|
|
if warning_shown == false then
|
|
print("["..__FILE__().."]:["..__LINE__().."] Unexpected new_entity_info == nil")
|
|
tprint({
|
|
old_entity_info = old_entity_info,
|
|
granularity = working_status.granularity,
|
|
entity_value = entity_value, network_id = network_id,
|
|
ifname=getInterfaceName(ifid)})
|
|
warning_shown = true
|
|
end
|
|
goto continue
|
|
end
|
|
|
|
new_entity_info["network_id"] = sstats.network_id
|
|
|
|
if (old_entity_info ~= nil) and (old_entity_info.ingress ~= nil)
|
|
and not checkpointExpired(old_entity_info, working_status) then
|
|
old_entity_info["network_id"] = sstats.network_id
|
|
|
|
-- wrap check
|
|
if (old_entity_info["egress"] > new_entity_info["egress"])
|
|
or (old_entity_info["ingress"] > new_entity_info["ingress"])
|
|
or (old_entity_info["inner"] > new_entity_info["inner"]) then
|
|
-- reset
|
|
if(verbose) then print("entity '"..subnet.."' stats reset("..working_status.granularity..")") end
|
|
old_entity_info = nil
|
|
end
|
|
else
|
|
-- reset
|
|
old_entity_info = nil
|
|
end
|
|
|
|
check_entity_alerts(ifid, "network", subnet, working_status, old_entity_info, new_entity_info)
|
|
::continue::
|
|
end
|
|
end
|
|
|
|
function check_host_alerts(ifid, working_status, host)
|
|
local entity_value = hostinfo2hostkey(hostkey2hostinfo(host), nil, true --[[force vlan]])
|
|
local old_entity_info, new_entity_info
|
|
|
|
if (working_status.configured_thresholds[entity_value] ~= nil)
|
|
or (working_status.configured_thresholds["local_hosts"] ~= nil) then
|
|
|
|
local checkpoints = interface.checkpointHost(ifid, entity_value, working_status.checkpoint_id, "high") or {}
|
|
|
|
old_entity_info = checkpoints["previous"] and j.decode(checkpoints["previous"])
|
|
new_entity_info = checkpoints["current"] and j.decode(checkpoints["current"])
|
|
else
|
|
-- no threshold configured, no need to checkpoint
|
|
new_entity_info = {}
|
|
end
|
|
|
|
-- attach anomalies to the new entity info (no need to attach them to the old)
|
|
if new_entity_info ~= nil then
|
|
local host_stats = interface.getHostInfo(host) or {}
|
|
new_entity_info["anomalies"] = host_stats["anomalies"] or {}
|
|
end
|
|
|
|
if (new_entity_info == nil) then
|
|
print("["..__FILE__().."]:["..__LINE__().."] Unexpected new_entity_info == nil")
|
|
tprint({new_entity_info = new_entity_info,
|
|
old_entity_info = old_entity_info,
|
|
granularity = working_status.granularity,
|
|
entity_value = entity_value, host = host,
|
|
ifname=getInterfaceName(ifid)})
|
|
return
|
|
end
|
|
|
|
if (old_entity_info ~= nil) and checkpointExpired(old_entity_info, working_status) then
|
|
-- reset
|
|
old_entity_info = nil
|
|
end
|
|
|
|
check_entity_alerts(ifid, "host", entity_value, working_status, old_entity_info, new_entity_info)
|
|
end
|
|
|
|
function check_hosts_alerts(ifid, working_status)
|
|
local hosts_iterator = callback_utils.getLocalHostsIterator(false --[[no details]])
|
|
|
|
for host, _ in hosts_iterator do
|
|
check_host_alerts(ifid, working_status, host)
|
|
end
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function newAlertsWorkingStatus(ifstats, granularity)
|
|
local res = {
|
|
granularity = granularity,
|
|
engine = alertEngine(granularity),
|
|
checkpoint_id = checkpointId(granularity),
|
|
ifid = ifstats.id,
|
|
engaged_cache = getEngagedAlertsCache(ifstats.id, granularity),
|
|
configured_thresholds = getConfiguredAlertsThresholds(ifstats.name, granularity),
|
|
dirty_cache = false,
|
|
now = os.time(),
|
|
interval = granularity2sec(granularity),
|
|
}
|
|
return res
|
|
end
|
|
|
|
function finalizeAlertsWorkingStatus(working_status)
|
|
-- Process the remaining alerts to release, e.g. related to expired hosts
|
|
for entity_type, entity_values in pairs(working_status.engaged_cache) do
|
|
for entity_value, alert_types in pairs(entity_values) do
|
|
for atype, alert_keys in pairs(alert_types) do
|
|
for akey, status in pairs(alert_keys) do
|
|
if status ~= "processed" then
|
|
releaseAlert(working_status.ifid, working_status.engine, entity_type, entity_value, atype, akey, {}, {})
|
|
working_status.dirty_cache = true
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
if working_status.dirty_cache then
|
|
invalidateEngagedAlertsCache(working_status.ifid)
|
|
end
|
|
end
|
|
|
|
-- #################################
|
|
|
|
-- A redis set with mac addresses as keys
|
|
local function getActiveDevicesHashKey(ifid)
|
|
return "ntopng.cache.active_devices.ifid_" .. ifid
|
|
end
|
|
|
|
function deleteActiveDevicesKey(ifid)
|
|
ntop.delCache(getActiveDevicesHashKey(ifid))
|
|
end
|
|
|
|
-- #################################
|
|
|
|
local function getMacUrl(mac)
|
|
return ntop.getHttpPrefix() .. "/lua/mac_details.lua?host=" .. mac
|
|
end
|
|
|
|
local function getSavedDeviceNameKey(mac)
|
|
return "ntopng.cache.devnames." .. mac
|
|
end
|
|
|
|
local function setSavedDeviceName(mac, name)
|
|
local key = getSavedDeviceNameKey(mac)
|
|
ntop.setCache(key, name)
|
|
end
|
|
|
|
local function getSavedDeviceName(mac)
|
|
local key = getSavedDeviceNameKey(mac)
|
|
return ntop.getCache(key)
|
|
end
|
|
|
|
-- Global function
|
|
function check_mac_ip_association_alerts()
|
|
while(true) do
|
|
local message = ntop.lpopCache("ntopng.alert_mac_ip_queue")
|
|
local elems
|
|
|
|
if((message == nil) or (message == "")) then
|
|
break
|
|
end
|
|
|
|
elems = json.decode(message)
|
|
|
|
if elems ~= nil then
|
|
--io.write(elems.ip.." ==> "..message.."[".. elems.ifname .."]\n")
|
|
interface.select(elems.ifname)
|
|
interface.storeAlert(alertEntity("mac"), elems.new_mac, alertType("mac_ip_association_change"), alertSeverity("warning"),
|
|
i18n("alert_messages.mac_ip_association_change",
|
|
{device=name, ip=elems.ip,
|
|
old_mac=elems.old_mac, old_mac_url=getMacUrl(elems.old_mac),
|
|
new_mac=elems.new_mac, new_mac_url=getMacUrl(elems.new_mac)}))
|
|
end
|
|
end
|
|
end
|
|
|
|
-- Global function
|
|
function check_process_alerts()
|
|
while(true) do
|
|
local message = ntop.lpopCache(alert_process_queue)
|
|
local elems
|
|
-- FIX: In the future we must create a special "ntopng/localhost" interface
|
|
local if_id, if_name = getFirstInterfaceId()
|
|
|
|
if((message == nil) or (message == "")) then
|
|
break
|
|
end
|
|
|
|
if(verbose) then print(message.."\n") end
|
|
|
|
local decoded = json.decode(message)
|
|
|
|
if(decoded == nil) then
|
|
if(verbose) then io.write("JSON Decoding error: "..message.."\n") end
|
|
else
|
|
interface.select(if_name)
|
|
interface.storeAlert(decoded.entity_type,
|
|
decoded.entity_value,
|
|
decoded.type,
|
|
decoded.severity,
|
|
decoded.message,
|
|
decoded.when)
|
|
end
|
|
end
|
|
end
|
|
|
|
local function check_macs_alerts(ifid, working_status)
|
|
if working_status.granularity ~= "min" then
|
|
return
|
|
end
|
|
|
|
local active_devices_set = getActiveDevicesHashKey(ifid)
|
|
local seen_devices_hash = getFirstSeenDevicesHashKey(ifid)
|
|
local seen_devices = ntop.getHashAllCache(seen_devices_hash) or {}
|
|
local prev_active_devices = swapKeysValues(ntop.getMembersCache(active_devices_set) or {})
|
|
local alert_new_devices_enabled = ntop.getPref("ntopng.prefs.alerts.device_first_seen_alert") == "1"
|
|
local alert_device_connection_enabled = ntop.getPref("ntopng.prefs.alerts.device_connection_alert") == "1"
|
|
local new_active_devices = {}
|
|
|
|
callback_utils.foreachDevice(getInterfaceName(ifid), nil, function(devicename, devicestats, devicebase)
|
|
-- note: location is always lan when capturing from a local interface
|
|
if (not devicestats.special_mac) and (devicestats.location == "lan") then
|
|
local mac = devicestats.mac
|
|
|
|
if not seen_devices[mac] then
|
|
-- First time we see a device
|
|
ntop.setHashCache(seen_devices_hash, mac, tostring(os.time()))
|
|
|
|
if alert_new_devices_enabled then
|
|
local name = getDeviceName(mac)
|
|
setSavedDeviceName(mac, name)
|
|
interface.storeAlert(alertEntity("mac"), mac, alertType("new_device"), alertSeverity("warning"),
|
|
i18n("alert_messages.a_new_device_has_connected", {device=name, url=getMacUrl(mac)}))
|
|
end
|
|
end
|
|
|
|
if not prev_active_devices[mac] then
|
|
-- Device connection
|
|
ntop.setMembersCache(active_devices_set, mac)
|
|
|
|
if alert_device_connection_enabled then
|
|
local name = getDeviceName(mac)
|
|
setSavedDeviceName(mac, name)
|
|
interface.storeAlert(alertEntity("mac"), mac, alertType("device_connection"), alertSeverity("info"),
|
|
i18n("alert_messages.device_has_connected", {device=name, url=getMacUrl(mac)}))
|
|
end
|
|
else
|
|
new_active_devices[mac] = 1
|
|
end
|
|
end
|
|
end)
|
|
|
|
for mac in pairs(prev_active_devices) do
|
|
if not new_active_devices[mac] then
|
|
-- Device disconnection
|
|
local name = getSavedDeviceName(mac)
|
|
ntop.delMembersCache(active_devices_set, mac)
|
|
|
|
if alert_device_connection_enabled then
|
|
interface.storeAlert(alertEntity("mac"), mac, alertType("device_disconnection"), alertSeverity("info"),
|
|
i18n("alert_messages.device_has_disconnected", {device=name, url=getMacUrl(mac)}))
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
-- #################################
|
|
|
|
-- A redis set with host pools as keys
|
|
local function getActivePoolsHashKey(ifid)
|
|
return "ntopng.cache.active_pools.ifid_" .. ifid
|
|
end
|
|
|
|
function deleteActivePoolsKey(ifid)
|
|
ntop.delCache(getActivePoolsHashKey(ifid))
|
|
end
|
|
|
|
-- #################################
|
|
|
|
-- Redis hashe with key=pool and value=list of quota_exceed_items, separated by |
|
|
local function getPoolsQuotaExceededItemsKey(ifid)
|
|
return "ntopng.cache.quota_exceeded_pools.ifid_" .. ifid
|
|
end
|
|
|
|
function deletePoolsQuotaExceededItemsKey(ifid)
|
|
ntop.delCache(getPoolsQuotaExceededItemsKey(ifid))
|
|
end
|
|
|
|
-- #################################
|
|
|
|
local function getHostPoolUrl(pool_id)
|
|
return ntop.getHttpPrefix() .. "/lua/hosts_stats.lua?pool=" .. pool_id
|
|
end
|
|
|
|
function check_host_pools_alerts(ifid, working_status)
|
|
if working_status.granularity ~= "min" then
|
|
return
|
|
end
|
|
|
|
local active_pools_set = getActivePoolsHashKey(ifid)
|
|
local prev_active_pools = swapKeysValues(ntop.getMembersCache(active_pools_set)) or {}
|
|
local alert_pool_connection_enabled = ntop.getPref("ntopng.prefs.alerts.pool_connection_alert") == "1"
|
|
local alerts_on_quota_exceeded = ntop.isPro() and ntop.getPref("ntopng.prefs.alerts.quota_exceeded_alert") == "1"
|
|
local pools_stats = nil
|
|
local quota_exceeded_pools_key = getPoolsQuotaExceededItemsKey(ifid)
|
|
local quota_exceeded_pools_values = ntop.getHashAllCache(quota_exceeded_pools_key) or {}
|
|
local quota_exceeded_pools = {}
|
|
local now_active_pools = {}
|
|
|
|
-- Deserialize quota_exceeded_pools
|
|
for pool, v in pairs(quota_exceeded_pools_values) do
|
|
quota_exceeded_pools[pool] = {}
|
|
|
|
for _, group in pairs(split(quota_exceeded_pools_values[pool], "|")) do
|
|
local parts = split(group, "=")
|
|
|
|
if #parts == 2 then
|
|
local proto = parts[1]
|
|
local quota = parts[2]
|
|
|
|
local parts = split(quota, ",")
|
|
quota_exceeded_pools[pool][proto] = {toboolean(parts[1]), toboolean(parts[2])}
|
|
end
|
|
end
|
|
-- quota_exceeded_pools[pool] is like {Youtube={true, false}}, where true is bytes_exceeded, false is time_exceeded
|
|
end
|
|
|
|
if ntop.isPro() then
|
|
pools_stats = interface.getHostPoolsStats()
|
|
end
|
|
|
|
local pools = interface.getHostPoolsInfo()
|
|
if(pools ~= nil) and (pools_stats ~= nil) then
|
|
for pool, info in pairs(pools.num_members_per_pool) do
|
|
local pool_stats = pools_stats[tonumber(pool)]
|
|
local pool_exceeded_quotas = quota_exceeded_pools[pool] or {}
|
|
|
|
-- Pool quota
|
|
if pool_stats then
|
|
local quotas_info = shaper_utils.getQuotasInfo(ifid, pool, pool_stats)
|
|
|
|
for proto, info in pairs(quotas_info) do
|
|
local prev_exceeded = pool_exceeded_quotas[proto] or {false,false}
|
|
|
|
if alerts_on_quota_exceeded then
|
|
if info.bytes_exceeded and not prev_exceeded[1] then
|
|
interface.storeAlert(alertEntity("host_pool"), tostring(pool), alertType("quota_exceeded"), alertSeverity("info"),
|
|
i18n("alert_messages.subject_quota_exceeded", {
|
|
pool = host_pools_utils.getPoolName(ifid, pool),
|
|
url = getHostPoolUrl(pool),
|
|
subject = i18n("alert_messages.proto_bytes_quotas", {proto=proto}),
|
|
quota = bytesToSize(info.bytes_quota),
|
|
value = bytesToSize(info.bytes_value)}))
|
|
end
|
|
|
|
if info.time_exceeded and not prev_exceeded[2] then
|
|
interface.storeAlert(alertEntity("host_pool"), alertType("quota_exceeded"), alertSeverity("info"),
|
|
i18n("alert_messages.subject_quota_exceeded", {
|
|
pool = host_pools_utils.getPoolName(ifid, pool),
|
|
url = getHostPoolUrl(pool),
|
|
subject = i18n("alert_messages.proto_time_quotas", {proto=proto}),
|
|
quota = secondsToTime(info.time_quota),
|
|
value = secondsToTime(info.time_value)}))
|
|
end
|
|
end
|
|
|
|
if not info.bytes_exceeded and not info.time_exceeded then
|
|
-- delete as no quota is left
|
|
pool_exceeded_quotas[proto] = nil
|
|
else
|
|
-- update/add serialized
|
|
pool_exceeded_quotas[proto] = {info.bytes_exceeded, info.time_exceeded}
|
|
end
|
|
end
|
|
|
|
if table.empty(pool_exceeded_quotas) then
|
|
ntop.delHashCache(quota_exceeded_pools_key, pool)
|
|
else
|
|
-- Serialize the new quota information for the pool
|
|
for proto, value in pairs(pool_exceeded_quotas) do
|
|
pool_exceeded_quotas[proto] = table.concat({tostring(value[1]), tostring(value[2])}, ",")
|
|
end
|
|
|
|
ntop.setHashCache(quota_exceeded_pools_key, pool, table.tconcat(pool_exceeded_quotas, "=", "|"))
|
|
end
|
|
end
|
|
|
|
-- Pool presence
|
|
if (pool ~= host_pools_utils.DEFAULT_POOL_ID) and (info.num_hosts > 0) then
|
|
now_active_pools[pool] = 1
|
|
|
|
if not prev_active_pools[pool] then
|
|
-- Pool connection
|
|
ntop.setMembersCache(active_pools_set, pool)
|
|
|
|
if alert_pool_connection_enabled then
|
|
interface.storeAlert(alertEntity("host_pool"), tostring(pool),
|
|
alertType("host_pool_connection"), alertSeverity("info"),
|
|
i18n("alert_messages.host_pool_has_connected",
|
|
{pool=host_pools_utils.getPoolName(ifid, pool), url=getHostPoolUrl(pool)}))
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
-- Pool presence
|
|
for pool in pairs(prev_active_pools) do
|
|
if not now_active_pools[pool] then
|
|
-- Pool disconnection
|
|
ntop.delMembersCache(active_pools_set, pool)
|
|
|
|
if alert_pool_connection_enabled then
|
|
interface.storeAlert(alertEntity("host_pool"), tostring(pool),
|
|
alertType("host_pool_disconnection"), alertSeverity("info"),
|
|
i18n("alert_messages.host_pool_has_disconnected",
|
|
{pool=host_pools_utils.getPoolName(ifid, pool),
|
|
url=getHostPoolUrl(pool)}))
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function scanAlerts(granularity, ifstats)
|
|
if not mustScanAlerts(ifstats) then return end
|
|
|
|
local ifname = ifstats["name"]
|
|
local ifid = getInterfaceId(ifname)
|
|
|
|
if(verbose) then print("[minute.lua] Scanning ".. granularity .." alerts for interface " .. ifname.."\n") end
|
|
|
|
local working_status = newAlertsWorkingStatus(ifstats, granularity)
|
|
|
|
check_interface_alerts(ifid, working_status)
|
|
check_networks_alerts(ifid, working_status)
|
|
check_hosts_alerts(ifid, working_status)
|
|
check_macs_alerts(ifid, working_status)
|
|
check_host_pools_alerts(ifid, working_status)
|
|
|
|
finalizeAlertsWorkingStatus(working_status)
|
|
end
|
|
|
|
-- #################################
|
|
|
|
local function deleteCachePattern(pattern)
|
|
local keys = ntop.getKeysCache(pattern)
|
|
|
|
for key in pairs(keys or {}) do
|
|
ntop.delCache(key)
|
|
end
|
|
end
|
|
|
|
function disableAlertsGeneration()
|
|
if not haveAdminPrivileges() then
|
|
return
|
|
end
|
|
|
|
-- Ensure we do not conflict with others
|
|
ntop.setPref("ntopng.prefs.disable_alerts_generation", "1")
|
|
ntop.reloadPreferences()
|
|
os.execute("sleep 3")
|
|
|
|
local selected_interface = ifname
|
|
local ifnames = interface.getIfNames()
|
|
|
|
-- Release any engaged alert
|
|
callback_utils.foreachInterface(ifnames, nil, function(ifname, ifstats)
|
|
if(verbose) then io.write("[Alerts] Processing interface "..ifname.."...\n") end
|
|
|
|
local sql_res = performAlertsQuery("select *", "engaged", {}, true --[[force]]) or {}
|
|
|
|
for _, res in pairs(sql_res) do
|
|
local entity_type = alertEntityRaw(res.alert_entity)
|
|
local entity_value = res.alert_entity_val
|
|
local atype = alertTypeRaw(res.alert_type)
|
|
local akey = res.alert_id
|
|
local engine = tonumber(res.alert_engine)
|
|
|
|
releaseAlert(ifstats.id, engine, entity_type, entity_value, atype, akey, {}, {}, true --[[force]])
|
|
end
|
|
end)
|
|
|
|
deleteCachePattern(getEngagedAlertsCacheKey("*", "*"))
|
|
|
|
if(verbose) then io.write("[Alerts] Disable done\n") end
|
|
interface.select(selected_interface)
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function flushAlertsData()
|
|
if not haveAdminPrivileges() then
|
|
return
|
|
end
|
|
|
|
local selected_interface = ifname
|
|
local ifnames = interface.getIfNames()
|
|
local force_query = true
|
|
local generation_toggle_backup = ntop.getPref("ntopng.prefs.disable_alerts_generation")
|
|
|
|
if(verbose) then io.write("[Alerts] Temporary disabling alerts generation...\n") end
|
|
ntop.setAlertsTemporaryDisabled(true);
|
|
os.execute("sleep 3")
|
|
|
|
callback_utils.foreachInterface(ifnames, nil, function(ifname, ifstats)
|
|
if(verbose) then io.write("[Alerts] Processing interface "..ifname.."...\n") end
|
|
|
|
-- Clear hosts status
|
|
interface.refreshHostsAlertsConfiguration(true --[[ with counters ]])
|
|
|
|
if(verbose) then io.write("[Alerts] Flushing SQLite configuration...\n") end
|
|
performAlertsQuery("DELETE", "engaged", {}, force_query)
|
|
performAlertsQuery("DELETE", "historical", {}, force_query)
|
|
performAlertsQuery("DELETE", "historical-flows", {}, force_query)
|
|
end)
|
|
|
|
if(verbose) then io.write("[Alerts] Flushing Redis configuration...\n") end
|
|
deleteCachePattern("ntopng.prefs.*alert*")
|
|
deleteCachePattern("ntopng.alerts.*")
|
|
deleteCachePattern(getEngagedAlertsCacheKey("*", "*"))
|
|
deleteCachePattern(getGlobalAlertsConfigurationHash("*", "*", "*"))
|
|
ntop.delCache(get_alerts_suppressed_hash_name("*"))
|
|
for _, key in pairs(get_make_room_keys("*")) do deleteCachePattern(key) end
|
|
|
|
if(verbose) then io.write("[Alerts] Enabling alerts generation...\n") end
|
|
ntop.setAlertsTemporaryDisabled(false);
|
|
|
|
callback_utils.foreachInterface(ifnames, nil, function(_ifname, ifstats)
|
|
-- Reload hosts status
|
|
interface.refreshHostsAlertsConfiguration(true --[[ with counters ]])
|
|
end)
|
|
|
|
ntop.setPref("ntopng.prefs.disable_alerts_generation", generation_toggle_backup)
|
|
|
|
if(verbose) then io.write("[Alerts] Flush done\n") end
|
|
interface.select(selected_interface)
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function alertNotificationActionToLabel(action)
|
|
local label = ""
|
|
|
|
if action == "engage" then
|
|
label = "Alert Engaged: "
|
|
elseif action == "release" then
|
|
label = "Alert Released: "
|
|
end
|
|
|
|
return label
|
|
end
|
|
|
|
-- #################################
|
|
|
|
--
|
|
-- Generic alerts extenral report
|
|
--
|
|
-- Guidelines:
|
|
--
|
|
-- - modules are enabled with the getAlertNotificationModuleEnableKey key
|
|
-- - module severity is defined with the getAlertNotificationModuleSeverityKey key
|
|
-- - A [module] name must have a corresponding modules/[module]_utils.lua script
|
|
--
|
|
|
|
-- NOTE: order is important as it defines evaluation order
|
|
local ALERT_NOTIFICATION_MODULES = {
|
|
"nagios", "slack"
|
|
}
|
|
|
|
if ntop.sendMail then -- only if email support is available
|
|
table.insert(ALERT_NOTIFICATION_MODULES, 1, "email")
|
|
end
|
|
|
|
function getAlertNotificationModuleEnableKey(module_name, short)
|
|
local short_k = "alerts." .. module_name .. "_notifications_enabled"
|
|
|
|
if short then
|
|
return short_k
|
|
else
|
|
return "ntopng.prefs." .. short_k
|
|
end
|
|
end
|
|
|
|
function getAlertNotificationModuleSeverityKey(module_name, short)
|
|
local short_k = "alerts." .. module_name .. "_severity"
|
|
|
|
if short then
|
|
return short_k
|
|
else
|
|
return "ntopng.prefs." .. short_k
|
|
end
|
|
end
|
|
|
|
local function getEnabledAlertNotificationModules()
|
|
local notifications_enabled = ntop.getPref("ntopng.prefs.alerts.external_notifications_enabled")
|
|
|
|
if not notifications_enabled or hasAlertsDisabled() then
|
|
return {}
|
|
end
|
|
|
|
local enabled_modules = {}
|
|
|
|
for _, modname in ipairs(ALERT_NOTIFICATION_MODULES) do
|
|
local module_enabled = ntop.getPref(getAlertNotificationModuleEnableKey(modname))
|
|
local min_severity = ntop.getPref(getAlertNotificationModuleSeverityKey(modname))
|
|
local req_name = modname
|
|
|
|
if isEmptyString(min_severity) then
|
|
min_severity = "warning"
|
|
end
|
|
|
|
if module_enabled == "1" then
|
|
local ok, _module = pcall(require, req_name)
|
|
|
|
if not ok then
|
|
traceError(TRACE_ERROR, TRACE_CONSOLE, "Error while importing alert notification module " .. req_name)
|
|
|
|
-- the traceback
|
|
io.write(_module)
|
|
else
|
|
enabled_modules[#enabled_modules + 1] = {
|
|
name = modname,
|
|
severity = min_severity,
|
|
export_frequency = tonumber(_module.EXPORT_FREQUENCY) or 60,
|
|
export_queue = "ntopng.alerts.modules_notifications_queue." .. modname,
|
|
["module"] = _module,
|
|
}
|
|
end
|
|
end
|
|
end
|
|
|
|
return enabled_modules
|
|
end
|
|
|
|
function alertNotificationToObject(alert_json)
|
|
local notification = json.decode(alert_json)
|
|
|
|
if not notification then
|
|
return nil
|
|
end
|
|
|
|
if(notification.type ~= nil) then
|
|
notification.type = alertTypeRaw(notification.type)
|
|
notification.entity_type = alertEntityRaw(notification.entity_type)
|
|
notification.severity = alertSeverityRaw(notification.severity)
|
|
end
|
|
|
|
if(notification.flow ~= nil) then
|
|
notification.message = formatRawFlow(notification.flow, notification.message)
|
|
end
|
|
|
|
return notification
|
|
end
|
|
|
|
function notification_timestamp_asc(a, b)
|
|
return (a.tstamp < b.tstamp)
|
|
end
|
|
|
|
function notification_timestamp_rev(a, b)
|
|
return (a.tstamp > b.tstamp)
|
|
end
|
|
|
|
function formatAlertNotification(notif, options)
|
|
local defaults = {
|
|
nohtml = false,
|
|
show_severity = true,
|
|
}
|
|
options = table.merge(defaults, options)
|
|
|
|
local msg_prefix = alertNotificationActionToLabel(notif.action)
|
|
local msg = "[" .. formatEpoch(notif.tstamp or 0) .. "]" ..
|
|
ternary(defaults.show_severity == true, "", "[" .. alertSeverityLabel(alertSeverity(notif.severity), options.nohtml) .. "]") ..
|
|
"[" .. alertTypeLabel(alertType(notif.type), options.nohtml) .."]: "
|
|
|
|
if options.nohtml then
|
|
msg = msg .. noHtml(msg_prefix .. notif.message)
|
|
else
|
|
msg = msg .. msg_prefix .. notif.message
|
|
end
|
|
|
|
return msg
|
|
end
|
|
|
|
-- NOTE: this is executed in a system VM, with no interfaces references
|
|
function processAlertNotifications(now, periodic_frequency, force_export)
|
|
local modules = getEnabledAlertNotificationModules()
|
|
|
|
-- Get new alerts
|
|
while(true) do
|
|
local json_message = ntop.lpopCache("ntopng.alerts.notifications_queue")
|
|
|
|
if((json_message == nil) or (json_message == "")) then
|
|
break
|
|
end
|
|
|
|
if(verbose) then
|
|
io.write("Alert Notification: " .. json_message .. "\n")
|
|
end
|
|
|
|
local message = json.decode(json_message)
|
|
|
|
-- dispatch
|
|
for _, m in ipairs(modules) do
|
|
if message.severity >= alertSeverity(m.severity) then
|
|
ntop.rpushCache(m.export_queue, json_message, MAX_NUM_PER_MODULE_QUEUED_ALERTS)
|
|
end
|
|
end
|
|
end
|
|
|
|
-- Process export notifications
|
|
for _, m in ipairs(modules) do
|
|
if force_export or ((now % m.export_frequency) < periodic_frequency) then
|
|
local rv = m.module.dequeueAlerts(m.export_queue)
|
|
|
|
if not rv.success then
|
|
local msg = rv.error_message or "Unknown Error"
|
|
|
|
-- TODO: generate alert
|
|
traceError(TRACE_ERROR, TRACE_CONSOLE, "Error while sending notifications via " .. m.name .. " module: " .. msg)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
local function notify_ntopng_status(started)
|
|
local info = ntop.getInfo()
|
|
local pid = info.pid
|
|
local msg
|
|
local obj
|
|
|
|
msg = 'ntopng v.'..info.version..' ('..info.OS..') '
|
|
if(started) then msg = msg.."start" else msg = msg.."stop" end
|
|
|
|
if(pid ~= nil) then msg = msg .. " [PID: "..pid.."] [ntopng "..info.command_line.."]" end
|
|
|
|
obj = { entity_type=1, entity_value="ntopng", type=20, severity=0, message=msg, when=os.time() }
|
|
|
|
ntop.rpushCache(alert_process_queue, json.encode(obj))
|
|
end
|
|
|
|
function notify_snmp_device_interface_status_change(snmp_host, snmp_interface)
|
|
local msg = i18n("alerts_dashboard.snmp_port_changed_status_from_to",
|
|
{device = snmp_host,
|
|
port = snmp_interface["name"] or snmp_interface["index"],
|
|
url = ntop.getHttpPrefix()..string.format("/lua/pro/enterprise/snmp_device_details.lua?host=%s", snmp_host),
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port_url = ntop.getHttpPrefix()..string.format("/lua/pro/enterprise/snmp_interface_details.lua?host=%s&snmp_port_idx=%d", snmp_host, snmp_interface["index"]),
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old_op = snmp_ifstatus(snmp_interface["prev_status"]),
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new_op = snmp_ifstatus(snmp_interface["status"])})
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local entity_value = string.format("%s_ifidx%d", snmp_host, snmp_interface["index"])
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local obj = {entity_type = alertEntity("snmp_device"),
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|
entity_value = entity_value,
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type = alertType("port_status_change"),
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|
severity = alertSeverity("info"),
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|
message = msg, when = os.time()
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|
}
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|
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ntop.rpushCache(alert_process_queue, json.encode(obj))
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|
end
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|
|
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function notify_ntopng_start() notify_ntopng_status(true) end
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function notify_ntopng_stop() notify_ntopng_status(false) end
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|
|
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-- DEBUG: uncomment this to test
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--~ scanAlerts("min", "wlan0")
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