mirror of
https://github.com/ntop/ntopng.git
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1236 lines
40 KiB
Lua
1236 lines
40 KiB
Lua
--
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-- (C) 2014-21 - ntop.org
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--
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local dirs = ntop.getDirs()
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package.path = dirs.installdir .. "/scripts/lua/modules/pools/?.lua;" .. package.path
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package.path = dirs.installdir .. "/scripts/lua/modules/alert_store/?.lua;" .. package.path
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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 = require "host_pools"
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local recovery_utils = require "recovery_utils"
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local alert_severities = require "alert_severities"
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local alert_entities = require "alert_entities"
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local alert_consts = require "alert_consts"
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local format_utils = require "format_utils"
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local telemetry_utils = require "telemetry_utils"
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local tracker = require "tracker"
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local alerts_api = require "alerts_api"
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local icmp_utils = require "icmp_utils"
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local user_scripts = require "user_scripts"
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local shaper_utils = nil
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if(ntop.isnEdge()) 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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-- ##############################################
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local alert_utils = {}
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-- ##############################################
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if ntop.isEnterpriseM() 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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-- add enterprise utils to this module
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alert_utils = require "enterprise_alert_utils"
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end
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-- ##############################################
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local function alertTypeDescription(alert_key, entity_id)
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local alert_id = alert_consts.getAlertType(alert_key, entity_id)
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if(alert_id) then
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if alert_consts.alert_types[alert_id].format then
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-- New API
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return alert_consts.alert_types[alert_id].format
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else
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-- TODO: Possible removed once migration is done
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return(alert_consts.alert_types[alert_id].i18n_description)
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end
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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 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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-- This function maps the SQLite table names to the conventional table
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-- names used in this script
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local function luaTableName(sqlite_table_name)
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--~ ALERTS_MANAGER_FLOWS_TABLE_NAME "flows_alerts"
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if(sqlite_table_name == "flows_alerts") then
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return("historical-flows")
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else
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return("historical")
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end
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end
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-- #################################
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local function performAlertsQuery(statement, what, opts, force_query, group_by)
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local wargs = {"1=1"}
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local oargs = {}
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if(group_by ~= nil) then
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group_by = " GROUP BY " .. group_by
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else
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group_by = ""
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end
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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") then
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if(tonumber(opts.entity) ~= alert_consts.alertEntity("host")) then
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return({})
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else
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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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end
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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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elseif (what ~= "historical-flows") then
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if (not isEmptyString(opts.entity)) then
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wargs[#wargs+1] = 'AND alert_entity = "'..(opts.entity)..'"'
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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_id) ~= nil then
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wargs[#wargs+1] = "AND alert_id = "..(opts.alert_id)
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end
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if what == "historical-flows" then
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if tonumber(opts.alert_l7_proto) ~= nil then
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wargs[#wargs+1] = "AND l7_proto = "..(opts.alert_l7_proto)
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end
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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 = "tstamp"
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elseif opts.sortColumn == "column_key" then
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order_by = "rowid"
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elseif opts.sortColumn == "column_type" then
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order_by = "alert_id"
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elseif opts.sortColumn == "column_count" and what ~= "engaged" then
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order_by = "alert_counter"
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elseif opts.sortColumn == "column_score" and what ~= "engaged" then
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order_by = "score"
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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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oargs[#oargs+1] = "ORDER BY "..order_by
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oargs[#oargs+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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oargs[#oargs+1] = "LIMIT"
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oargs[#oargs+1] = to_skip..","..(opts.perPage)
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end
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local query = table.concat(wargs, " ")
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group_by = table.concat(oargs, " ") .. group_by
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local res
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-- Uncomment to debug the queries
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-- tprint(statement.." (from "..what..") WHERE "..query .. " ".. group_by)
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if((what == "engaged") or (what == "historical")) then
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res = interface.queryAlertsRaw(statement, query, group_by, force_query)
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elseif what == "historical-flows" then
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res = interface.queryFlowAlertsRaw(statement, query, group_by, 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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local function getNumEngagedAlerts(options)
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local entity_type_filter = tonumber(options.entity)
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local entity_value_filter = options.entity_val
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local res = interface.getEngagedAlertsCount(entity_type_filter, entity_value_filter)
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if(res ~= nil) then
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return(res.num_alerts)
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end
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return(0)
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end
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-- #################################
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-- Remove pagination options from the options
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local function getUnpagedAlertOptions(options)
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local res = {}
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local paged_option = { currentPage=1, perPage=1, sortColumn=1, sortOrder=1 }
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for k,v in pairs(options) do
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if not paged_option[k] then
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res[k] = v
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end
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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 alert_utils.getNumAlerts(what, options)
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local num = 0
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if(what == "engaged") then
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num = getNumEngagedAlerts(options)
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else
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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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end
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return num
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end
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-- #################################
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-- Faster than of getNumAlerts
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function alert_utils.hasAlerts(what, options)
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if(what == "engaged") then
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return(getNumEngagedAlerts(options) > 0)
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end
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local opts = getUnpagedAlertOptions(options or {})
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-- limit 1
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opts.perPage = 1
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opts.currentPage = 1
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local res = performAlertsQuery("SELECT rowid", what, opts)
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if((res ~= nil) and (#res == 1)) then
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return(true)
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else
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return(false)
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end
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end
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-- #################################
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local function engagedAlertsQuery(params)
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local type_filter = tonumber(params.alert_id)
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local entity_type_filter = tonumber(params.entity)
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local entity_value_filter = params.entity_val
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local perPage = tonumber(params.perPage or 10)
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local sortColumn = params.sortColumn or "column_"
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local sortOrder = params.sortOrder or "desc"
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local sOrder = ternary(sortOrder == "desc", rev_insensitive, asc_insensitive)
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local currentPage = tonumber(params.currentPage or 1)
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local totalRows = 0
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-- tprint(string.format("type=%s sev=%s entity=%s val=%s", type_filter, severity_filter, entity_type_filter, entity_value_filter))
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local alerts = interface.getEngagedAlerts(entity_type_filter, entity_value_filter, type_filter)
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local sort_2_col = {}
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-- Sort
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for idx, alert in pairs(alerts) do
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if sortColumn == "column_type" then
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sort_2_col[idx] = alert.alert_id
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elseif sortColumn == "column_duration" then
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sort_2_col[idx] = os.time() - alert.tstamp
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else -- column_date
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sort_2_col[idx] = alert.tstamp
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end
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totalRows = totalRows + 1
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end
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-- Pagination
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local to_skip = (currentPage-1) * perPage
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local totalRows = #alerts
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local res = {}
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local i = 0
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for idx in pairsByValues(sort_2_col, sOrder) do
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if i >= to_skip + perPage then
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break
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end
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if (i >= to_skip) then
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res[#res + 1] = alerts[idx]
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end
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i = i + 1
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end
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return res, totalRows
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end
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-- #################################
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--@brief Deletes all stored alerts matching an host and an IP
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-- @return nil
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function alert_utils.deleteFlowAlertsMatching(host_ip, alert_id)
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local flow_alert_store = require("flow_alert_store").new()
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if not isEmptyString(host_ip) then
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flow_alert_store:add_ip_filter(hostkey2hostinfo(host_ip)["host"])
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end
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flow_alert_store:add_alert_id_filter(alert_id)
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-- Perform the actual deletion
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flow_alert_store:delete()
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end
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-- #################################
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--@brief Deletes all stored alerts matching an host and an IP
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-- @return nil
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function alert_utils.deleteHostAlertsMatching(host_ip, alert_id)
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local host_alert_store = require("host_alert_store").new()
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if not isEmptyString(host_ip) then
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host_alert_store:add_ip_filter(hostkey2hostinfo(host_ip)["host"])
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end
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host_alert_store:add_alert_id_filter(alert_id)
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-- Perform the actual deletion
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host_alert_store:delete()
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end
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-- #################################
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-- this function returns an object with parameters specific for one tab
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function alert_utils.getTabParameters(_get, what)
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local opts = {}
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for k,v in pairs(_get) do opts[k] = v end
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-- these options are contextual to the current tab (status)
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if _get.status ~= what then
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opts.alert_id = nil
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end
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if not isEmptyString(what) then opts.status = what end
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opts.ifid = interface.getId()
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return opts
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end
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-- #################################
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-- Return more information for the flow alert description
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local function getAlertTypeInfo(record, alert_info)
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local res = ""
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local l7proto_name = interface.getnDPIProtoName(tonumber(record["l7_proto"]) or 0)
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if l7proto_name == "ICMP" then -- is ICMPv4
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-- TODO: old format - remove when the all the flow alers will be generated in lua
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local type_code = {type = alert_info["icmp.icmp_type"], code = alert_info["icmp.icmp_code"]}
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if table.empty(type_code) and alert_info["icmp"] then
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-- This is the new format created when setting the alert from lua
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type_code = {type = alert_info["icmp"]["type"], code = alert_info["icmp"]["code"]}
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end
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if alert_info["icmp.unreach.src_ip"] then -- TODO: old format to be removed
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res = string.format("[%s]", i18n("icmp_page.icmp_port_unreachable_extra", {unreach_host=alert_info["icmp.unreach.dst_ip"], unreach_port=alert_info["icmp.unreach.dst_port"], unreach_protocol = l4_proto_to_string(alert_info["icmp.unreach.protocol"])}))
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elseif alert_info["icmp"] and alert_info["icmp"]["unreach"] then -- New format
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res = string.format("[%s]", i18n("icmp_page.icmp_port_unreachable_extra", {unreach_host=alert_info["icmp"]["unreach"]["dst_ip"], unreach_port=alert_info["icmp"]["unreach"]["dst_port"], unreach_protocol = l4_proto_to_string(alert_info["icmp"]["unreach"]["protocol"])}))
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else
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res = string.format("[%s]", icmp_utils.get_icmp_label(4 --[[ ipv4 --]], type_code["type"], type_code["code"]))
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end
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end
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return string.format(" %s", res)
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end
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-- #################################
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-- This function formats flows in alerts
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local function formatRawFlow(ifid, alert, alert_json)
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require "flow_utils"
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local time_bounds
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local add_links = (not skip_add_links)
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if interfaceHasNindexSupport() and not skip_add_links then
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-- only add links if nindex is present
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add_links = true
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time_bounds = {getAlertTimeBounds(alert)}
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end
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-- TODO: adapter just to be compatible with old alerts, can be removed at some point
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if alert_json["alert_info"] then
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alert_json = json.decode(alert_json["alert_info"])
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end
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-- active flow lookup
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if not interface.isView() and alert_json and alert_json["ntopng.key"] and alert_json["hash_entry_id"] and alert["alert_tstamp"] then
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-- attempt a lookup on the active flows
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local active_flow = interface.findFlowByKeyAndHashId(alert_json["ntopng.key"], alert_json["hash_entry_id"])
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if active_flow and active_flow["seen.first"] < tonumber(alert["alert_tstamp"]) then
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return string.format("<i class=\"fas fa-stream\"></i> %s <A class='btn-sx' HREF='%s/lua/flow_details.lua?flow_key=%u&flow_hash_id=%u'><i class='fas fa-search-plus'></i></A> %s",
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'',
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ntop.getHttpPrefix(), active_flow["ntopng.key"], active_flow["hash_entry_id"],
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getFlowLabel(active_flow, true, true))
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end
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end
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-- pretend alert is a flow to reuse getFlowLabel
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local flow = {
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["cli.ip"] = alert["cli_addr"], ["cli.port"] = tonumber(alert["cli_port"]),
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["cli.blacklisted"] = tostring(alert["cli_blacklisted"]) == "1",
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["cli.localhost"] = tostring(alert["cli_localhost"]) == "1",
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["srv.ip"] = alert["srv_addr"], ["srv.port"] = tonumber(alert["srv_port"]),
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["srv.blacklisted"] = tostring(alert["srv_blacklisted"]) == "1",
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["srv.localhost"] = tostring(alert["srv_localhost"]) == "1",
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["vlan"] = alert["vlan_id"]}
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flow = "[ <i class=\"fas fa-stream\"></i> "..(getFlowLabel(flow, false, add_links, time_bounds, {page = "alerts"}) or "").."] "
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local l4_proto_label = l4_proto_to_string(alert["proto"] or 0) or ""
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if not isEmptyString(l4_proto_label) then
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flow = flow.."[" .. l4_proto_label .. "] "
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end
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if alert_json ~= nil then
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-- render the json
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local msg = ""
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if not isEmptyString(flow) then
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msg = msg..flow.." "
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end
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if not isEmptyString(alert_json["info"]) then
|
|
local lb = ""
|
|
local info
|
|
|
|
if string.len(alert_json["info"]) > 24 then
|
|
info = "<abbr title=\"".. alert_json["info"] .."\">".. shortenString(alert_json["info"], 24)
|
|
else
|
|
info = alert_json["info"]
|
|
end
|
|
msg = msg.."[" .. info ..lb.."] "
|
|
end
|
|
|
|
flow = msg
|
|
end
|
|
|
|
if alert_json then
|
|
flow = flow..getAlertTypeInfo(alert, alert_json)
|
|
end
|
|
|
|
return flow
|
|
end
|
|
|
|
-- #################################
|
|
|
|
local function getMenuEntries(status, selection_name, get_params)
|
|
local actual_entries = {}
|
|
|
|
-- table.clone needed to modify some parameters while keeping the original unchanged
|
|
local params = table.clone(get_params)
|
|
|
|
-- Remove previous filters
|
|
params.alert_type = nil
|
|
params.l7_proto = nil
|
|
|
|
local select_clause = {} -- Contains the selection which is <alert_entity>, <selection_name>
|
|
local group_by_clause = {} -- The clause used to group alerts. It is <alert_entity>, <selection_name> for all non-flow alerts
|
|
|
|
if status == "historical-flows" then
|
|
-- Flows don't have the alert_entity as a table column so we just put the entity id as a placeholder
|
|
select_clause[#select_clause + 1] = string.format("%u entity", alert_entities.flow.entity_id)
|
|
else
|
|
-- TODO: entities will be removed when every entity will have its own database table
|
|
select_clause[#select_clause + 1] = "alert_entity entity"
|
|
group_by_clause[#group_by_clause + 1] = "alert_entity"
|
|
end
|
|
|
|
if selection_name == "type" then
|
|
select_clause[#select_clause + 1] = "alert_id id"
|
|
group_by_clause[#group_by_clause + 1] = "alert_id"
|
|
elseif selection_name == "l7_proto" then
|
|
select_clause[#select_clause + 1] = "l7_proto id"
|
|
group_by_clause[#group_by_clause + 1] = "l7_proto"
|
|
end
|
|
|
|
select_clause[#select_clause + 1] = "count(*) count"
|
|
|
|
local select_str = "SELECT "..table.concat(select_clause, ", ")
|
|
local group_by_str = table.concat(group_by_clause, ", ")
|
|
|
|
actual_entries = performAlertsQuery(select_str, status, params, nil, group_by_str --[[ group by ]])
|
|
|
|
-- tprint({select_str, group_by_str, status, params})
|
|
|
|
return actual_entries
|
|
end
|
|
|
|
-- #################################
|
|
|
|
local function dropdownUrlParams(get_params)
|
|
local buttons = ""
|
|
|
|
for param, val in pairs(get_params) do
|
|
-- NOTE: exclude the ifid parameter to avoid interface selection issues with system interface alerts
|
|
if((param ~= "alert_type") and (param ~= "status") and (param ~= "ifid")) then
|
|
buttons = buttons.."&"..param.."="..val
|
|
end
|
|
end
|
|
|
|
return(buttons)
|
|
end
|
|
|
|
-- #################################
|
|
|
|
local function drawDropdown(status, selection_name, active_entry, button_label, get_params, actual_entries)
|
|
local id_to_label
|
|
if selection_name == "type" then
|
|
id_to_label = alert_consts.alertTypeLabel
|
|
elseif selection_name == "l7_proto" then
|
|
id_to_label = interface.getnDPIProtoName
|
|
end
|
|
|
|
actual_entries = actual_entries or getMenuEntries(status, selection_name, get_params)
|
|
|
|
local buttons = '<div class="btn-group">'
|
|
|
|
button_label = button_label or firstToUpper(selection_name)
|
|
if active_entry ~= nil and active_entry ~= "" then
|
|
if selection_name == "l7_proto" then
|
|
button_label = firstToUpper(interface.getnDPIProtoName(active_entry))..'<span class="fas fa-filter"></span>'
|
|
else
|
|
button_label = firstToUpper(active_entry)..'<span class="fas fa-filter"></span>'
|
|
end
|
|
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 = 'active' end
|
|
buttons = buttons..'<li><a class="dropdown-item '..class_active..'" href="?status='..status..'">All</a></i>'
|
|
|
|
-- add a label to each entry
|
|
for _, entry in pairs(actual_entries) do
|
|
local id = tonumber(entry["id"])
|
|
local alert_entity = tonumber(entry["entity"])
|
|
|
|
entry.label = firstToUpper(id_to_label(id, true, alert_entity))
|
|
end
|
|
|
|
for _, entry in pairsByField(actual_entries, 'label', asc) do
|
|
local id = tonumber(entry["id"])
|
|
local alert_entity = tonumber(entry["entity"])
|
|
local count = entry["count"]
|
|
if(id >= 0) then
|
|
local label = entry.label
|
|
|
|
class_active = ""
|
|
if label == active_entry then class_active = 'active' end
|
|
-- buttons = buttons..'<li'..class_active..'><a class="dropdown-item" href="'..ntop.getHttpPrefix()..'/lua/show_alerts.lua?status='..status
|
|
buttons = buttons..'<li><a class="dropdown-item '..class_active..'" href="?status='..status
|
|
buttons = buttons..dropdownUrlParams(get_params)
|
|
buttons = buttons..'&entity='..(alert_entity or '')
|
|
buttons = buttons..'&alert_'..selection_name..'='..id..'">'
|
|
buttons = buttons..firstToUpper(label)
|
|
|
|
-- Add the formatted alert entity between square brackets
|
|
if alert_entity then
|
|
buttons = buttons..' ['..alert_consts.alertEntityLabel(alert_entity)..']'
|
|
end
|
|
|
|
buttons = buttons..' ('..count..')</a></li>'
|
|
end
|
|
end
|
|
|
|
buttons = buttons..'</ul></div>'
|
|
|
|
return buttons
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function alert_utils.drawAlertPCAPDownloadDialog(ifid)
|
|
local modalID = "pcapDownloadModal"
|
|
|
|
print[[
|
|
<script>
|
|
function bpfValidator(filter_field) {
|
|
// no pre validation required as the user is not
|
|
// supposed to edit the filter here
|
|
return true;
|
|
}
|
|
|
|
function pcapDownload(item) {
|
|
var modalID = "]] print(modalID) print [[";
|
|
var bpf_filter = item.getAttribute('data-filter');
|
|
var epoch_begin = item.getAttribute('data-epoch-begin');
|
|
var epoch_end = item.getAttribute('data-epoch-end');
|
|
var date_begin = new Date(epoch_begin * 1000);
|
|
var date_end = new Date(epoch_begin * 1000);
|
|
var epoch_begin_formatted = $.datepicker.formatDate('M dd, yy ', date_begin)+date_begin.getHours()
|
|
+":"+date_begin.getMinutes()+":"+date_begin.getSeconds();
|
|
var epoch_end_formatted = $.datepicker.formatDate('M dd, yy ', date_end)
|
|
+date_end.getHours()+":"+date_end.getMinutes()+":"+date_end.getSeconds();
|
|
|
|
$('#'+modalID+'_ifid').val(]] print(ifid) print [[);
|
|
$('#'+modalID+'_epoch_begin').val(epoch_begin);
|
|
$('#'+modalID+'_epoch_end').val(epoch_end);
|
|
$('#'+modalID+'_begin').text(epoch_begin_formatted);
|
|
$('#'+modalID+'_end').text(epoch_end_formatted);
|
|
$('#'+modalID+'_query_items').html("");
|
|
$('#'+modalID+'_chart_link').val("");
|
|
|
|
$('#'+modalID+'_bpf_filter').val(bpf_filter);
|
|
$('#'+modalID).modal('show');
|
|
|
|
$("#]] print(modalID) print [[ form:data(bs.validator)").each(function(){
|
|
$(this).data("bs.validator").validate();
|
|
});
|
|
}
|
|
|
|
function submitPcapDownload(form) {
|
|
var frm = $('#'+form.id);
|
|
window.open(']] print(ntop.getHttpPrefix()) print [[/lua/rest/v1/get/pcap/live_extraction.lua?' + frm.serialize(), '_self', false);
|
|
$('#]] print(modalID) print [[').modal('hide');
|
|
return false;
|
|
}
|
|
|
|
</script>
|
|
]]
|
|
|
|
print(template.gen("traffic_extraction_dialog.html", { dialog = {
|
|
id = modalID,
|
|
title = i18n("traffic_recording.pcap_download"),
|
|
message = i18n("traffic_recording.about_to_download_flow", {date_begin = '<span id="'.. modalID ..'_begin">', date_end = '<span id="'.. modalID ..'_end">'}),
|
|
submit = i18n("traffic_recording.download"),
|
|
form_method = "post",
|
|
validator_options = "{ custom: { bpf: bpfValidator }, errors: { bpf: '"..i18n("traffic_recording.invalid_bpf").."' } }",
|
|
form_action = ntop.getHttpPrefix().."/lua/traffic_extraction.lua",
|
|
form_onsubmit = "submitPcapDownload",
|
|
advanced_class = "d-none",
|
|
extract_now_class = "d-none", -- direct download only
|
|
}}))
|
|
|
|
print(template.gen("modal_confirm_dialog.html", { dialog = {
|
|
id = "no-recording-data",
|
|
title = i18n("traffic_recording.pcap_download"),
|
|
message = "<span id='no-recording-data-message'></span>",
|
|
}}))
|
|
|
|
end
|
|
|
|
-- #################################
|
|
|
|
-- A redis set with mac addresses as keys
|
|
function alert_utils.getActiveDevicesHashKey(ifid)
|
|
return "ntopng.cache.active_devices.ifid_" .. ifid
|
|
end
|
|
|
|
function alert_utils.deleteActiveDevicesKey(ifid)
|
|
ntop.delCache(alert_utils.getActiveDevicesHashKey(ifid))
|
|
end
|
|
|
|
-- #################################
|
|
|
|
-- A redis set with host pools as keys
|
|
local function getActivePoolsHashKey(ifid)
|
|
return "ntopng.cache.active_pools.ifid_" .. ifid
|
|
end
|
|
|
|
function alert_utils.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 alert_utils.check_host_pools_alerts(params, ifid, alert_pool_connection_enabled, alerts_on_quota_exceeded)
|
|
local active_pools_set = getActivePoolsHashKey(ifid)
|
|
local prev_active_pools = swapKeysValues(ntop.getMembersCache(active_pools_set)) or {}
|
|
local pools_stats = interface.getHostPoolsStats()
|
|
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
|
|
|
|
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 ~= nil) and (shaper_utils ~= nil)) 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
|
|
local alert = alert_consts.alert_types.alert_quota_exceeded.new(
|
|
"traffic_quota",
|
|
pool,
|
|
proto,
|
|
info.bytes_value,
|
|
info.bytes_quota
|
|
)
|
|
|
|
alert:set_score(50)
|
|
alert:store(alerts_api.hostPoolEntity(pool))
|
|
end
|
|
|
|
if info.time_exceeded and not prev_exceeded[2] then
|
|
local alert = alert_consts.alert_types.alert_quota_exceeded.new(
|
|
"time_quota",
|
|
pool,
|
|
proto,
|
|
info.time_value,
|
|
info.time_quota
|
|
)
|
|
|
|
alert:set_score(50)
|
|
alert:store(alerts_api.hostPoolEntity(pool))
|
|
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.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
|
|
local alert = alert_consts.alert_types.alert_host_pool_connection.new(
|
|
pool
|
|
)
|
|
|
|
alert:set_score(10)
|
|
alert:store(alerts_api.hostPoolEntity(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
|
|
local alert = alert_consts.alert_types.alert_host_pool_disconnection.new(
|
|
pool
|
|
)
|
|
|
|
alert:set_score(10)
|
|
alert:store(alerts_api.hostPoolEntity(pool))
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function alert_utils.disableAlertsGeneration()
|
|
if not haveAdminPrivileges() then
|
|
return
|
|
end
|
|
|
|
-- Ensure we do not conflict with others
|
|
ntop.setPref("ntopng.prefs.disable_alerts_generation", "1")
|
|
if(verbose) then io.write("[Alerts] Disable done\n") end
|
|
end
|
|
|
|
-- #################################
|
|
|
|
local function alertNotificationActionToLabel(action, use_emoji)
|
|
local label = "["
|
|
|
|
if action == "engage" then
|
|
if(use_emoji) then label = label .."\xE2\x9D\x97 " end
|
|
label = label .. "Engaged]"
|
|
elseif action == "release" then
|
|
if(use_emoji) then label = label .."\xE2\x9C\x94 " end
|
|
label = label .. "Released]"
|
|
end
|
|
|
|
return label
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function alert_utils.getConfigsetAlertLink(alert_json)
|
|
local info = alert_json.alert_generation or (alert_json.alert_info and alert_json.alert_info.alert_generation)
|
|
|
|
if(info and isAdministrator()) then
|
|
return(' <a href="'.. ntop.getHttpPrefix() ..'/lua/admin/edit_configset.lua?'..
|
|
'subdir='.. info.subdir ..'&user_script='.. info.script_key ..'#all">'..
|
|
'<i class="fas fa-cog" title="'.. i18n("edit_configuration") ..'"></i></a>')
|
|
end
|
|
|
|
return('')
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function alert_utils.getAlertInfo(alert)
|
|
local alert_json = alert["json"] or alert["alert_json"]
|
|
|
|
if isEmptyString(alert_json) then
|
|
alert_json = {}
|
|
elseif(string.sub(alert_json, 1, 1) == "{") then
|
|
alert_json = json.decode(alert_json) or {}
|
|
end
|
|
|
|
return alert_json
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function alert_utils.formatAlertMessage(ifid, alert, alert_json, skip_live_data)
|
|
local msg
|
|
|
|
if(alert_json == nil) then
|
|
alert_json = alert_utils.getAlertInfo(alert)
|
|
end
|
|
|
|
msg = alert_json
|
|
local description = alertTypeDescription(alert.alert_id, alert.entity_id)
|
|
|
|
if(type(description) == "string") then
|
|
-- localization string
|
|
msg = i18n(description, msg)
|
|
elseif(type(description) == "function") then
|
|
msg = description(ifid, alert, msg)
|
|
end
|
|
|
|
if(type(msg) == "table") then
|
|
return("")
|
|
end
|
|
|
|
if(msg) then
|
|
if(alert_consts.getAlertType(alert.alert_id, alert.entity_id) == "alert_am_threshold_cross") then
|
|
local plugins_utils = require "plugins_utils"
|
|
local active_monitoring_utils = plugins_utils.loadModule("active_monitoring", "am_utils")
|
|
local host = json.decode(alert.json)["host"]
|
|
|
|
if host and host.measurement and not host.is_infrastructure then
|
|
msg = msg .. ' <a href="'.. ntop.getHttpPrefix() ..'/plugins/active_monitoring_stats.lua?am_host='
|
|
.. host.host .. '&measurement='.. host.measurement ..'&page=overview"><i class="fas fa-cog" title="'.. i18n("edit_configuration") ..'"></i></a>'
|
|
end
|
|
else
|
|
msg = msg .. alert_utils.getConfigsetAlertLink(alert_json)
|
|
end
|
|
end
|
|
|
|
if isEmptyString(msg) then
|
|
msg = alert_consts.alertTypeLabel(tonumber(alert.alert_id), true --[[ no_html --]], alert.entity_id)
|
|
end
|
|
|
|
return(msg or "")
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function alert_utils.formatFlowAlertMessage(ifid, alert, alert_json, skip_live_data)
|
|
local msg
|
|
|
|
if(alert_json == nil) then
|
|
alert_json = alert_utils.getAlertInfo(alert)
|
|
end
|
|
|
|
msg = alert_json
|
|
local description = alertTypeDescription(alert.alert_id, alert_entities.flow.entity_id)
|
|
|
|
if(type(description) == "string") then
|
|
-- localization string
|
|
msg = i18n(description, msg)
|
|
elseif(type(description) == "function") then
|
|
msg = description(ifid, alert, msg)
|
|
end
|
|
|
|
if isEmptyString(msg) then
|
|
msg = alert_consts.alertTypeLabel(tonumber(alert.alert_id), true --[[ no_html --]], alert_entities.flow.entity_id)
|
|
end
|
|
|
|
return msg or ""
|
|
end
|
|
|
|
-- #################################
|
|
|
|
function alert_utils.notification_timestamp_rev(a, b)
|
|
return (a.tstamp > b.tstamp)
|
|
end
|
|
|
|
-- Returns a summary of the alert as readable text
|
|
function alert_utils.formatAlertNotification(notif, options)
|
|
local defaults = {
|
|
nohtml = false,
|
|
show_severity = true,
|
|
}
|
|
options = table.merge(defaults, options)
|
|
|
|
local ifname
|
|
local severity
|
|
local when
|
|
|
|
if(notif.ifid ~= -1) then
|
|
ifname = string.format(" [%s]", getInterfaceName(notif.ifid))
|
|
else
|
|
ifname = ""
|
|
end
|
|
|
|
if(options.show_severity == false) then
|
|
severity = ""
|
|
else
|
|
severity = " [" .. alert_consts.alertSeverityLabel(notif.score, options.nohtml, options.emoji) .. "]"
|
|
end
|
|
|
|
if(options.nodate == true) then
|
|
when = ""
|
|
else
|
|
when = formatEpoch(notif.tstamp_end or notif.tstamp or 0)
|
|
|
|
if(not options.no_bracket_around_date) then
|
|
when = "[" .. when .. "]"
|
|
end
|
|
|
|
when = when .. " "
|
|
end
|
|
|
|
local msg = string.format("%s%s%s [%s]",
|
|
when, ifname, severity,
|
|
alert_consts.alertTypeLabel(notif.alert_id, options.nohtml))
|
|
|
|
-- entity can be hidden for example when one is OK with just the message
|
|
if options.show_entity then
|
|
msg = msg.."["..alert_consts.alertEntityLabel(notif.entity_id).."]"
|
|
|
|
if notif.entity_id ~= "flow" then
|
|
local ev = notif.entity_val
|
|
if notif.entity_id == "host" then
|
|
-- suppresses @0 when the vlan is zero
|
|
ev = hostinfo2hostkey(hostkey2hostinfo(notif.entity_val))
|
|
end
|
|
|
|
msg = msg.."["..(ev or '').."]"
|
|
end
|
|
end
|
|
|
|
-- add the label, that is, engaged or released
|
|
msg = msg .. " " .. alertNotificationActionToLabel(notif.action, options.emoji).. " "
|
|
local alert_message = alert_utils.formatAlertMessage(notif.ifid, notif)
|
|
|
|
if(options.add_cr) then
|
|
msg = msg .. "\n"
|
|
end
|
|
|
|
if options.nohtml then
|
|
msg = msg .. noHtml(alert_message)
|
|
else
|
|
msg = msg .. alert_message
|
|
end
|
|
|
|
return msg
|
|
end
|
|
|
|
-- ##############################################
|
|
|
|
-- Processes queued alerts and returns the information necessary to store them.
|
|
-- Alerts are only enqueued by AlertsQueue in C. From lua, the alerts_api
|
|
-- can be called directly as slow operations will be postponed
|
|
local function processStoreAlertFromQueue(alert)
|
|
local entity_info = nil
|
|
local type_info = nil
|
|
|
|
interface.select(tostring(alert.ifid))
|
|
|
|
if(alert.alert_id == "misconfigured_dhcp_range") then
|
|
local router_info = {host = alert.router_ip, vlan = alert.vlan_id}
|
|
entity_info = alerts_api.hostAlertEntity(alert.client_ip, alert.vlan_id)
|
|
type_info = alert_consts.alert_types.alert_ip_outsite_dhcp_range.new(
|
|
router_info,
|
|
alert.mac_address,
|
|
alert.client_mac,
|
|
alert.sender_mac
|
|
)
|
|
type_info:set_score(50)
|
|
type_info:set_subtype(string.format("%s_%s_%s", hostinfo2hostkey(router_info), alert.client_mac, alert.sender_mac))
|
|
elseif(alert.alert_id == "mac_ip_association_change") then
|
|
local name = getDeviceName(alert.new_mac)
|
|
entity_info = alerts_api.macEntity(alert.new_mac)
|
|
type_info = alert_consts.alert_types.alert_mac_ip_association_change.new(
|
|
name,
|
|
alert.ip,
|
|
alert.old_mac,
|
|
alert.new_mac
|
|
)
|
|
type_info:set_score(50)
|
|
type_info:set_subtype(string.format("%s_%s_%s", alert.ip, alert.old_mac, alert.new_mac))
|
|
elseif(alert.alert_id == "login_failed") then
|
|
entity_info = alerts_api.userEntity(alert.user)
|
|
type_info = alert_consts.alert_types.alert_login_failed.new()
|
|
type_info:set_score(50)
|
|
elseif(alert.alert_id == "broadcast_domain_too_large") then
|
|
entity_info = alerts_api.macEntity(alert.src_mac)
|
|
type_info = alert_consts.alert_types.alert_broadcast_domain_too_large.new(alert.src_mac, alert.dst_mac, alert.vlan_id, alert.spa, alert.tpa)
|
|
type_info:set_score(50)
|
|
type_info:set_subtype(string.format("%u_%s_%s_%s_%s", alert.vlan_id, alert.src_mac, alert.spa, alert.dst_mac, alert.tpa))
|
|
elseif((alert.alert_id == "user_activity") and (alert.scope == "login")) then
|
|
entity_info = alerts_api.userEntity(alert.user)
|
|
type_info = alert_consts.alert_types.alert_user_activity.new(
|
|
"login",
|
|
nil,
|
|
nil,
|
|
nil,
|
|
"authorized"
|
|
)
|
|
type_info:set_score(10)
|
|
type_info:set_subtype("login//")
|
|
elseif(alert.alert_id == "nfq_flushed") then
|
|
entity_info = alerts_api.interfaceAlertEntity(alert.ifid)
|
|
type_info = alert_consts.alert_types.alert_nfq_flushed.new(
|
|
getInterfaceName(alert.ifid),
|
|
alert.pct,
|
|
alert.tot,
|
|
alert.dropped
|
|
)
|
|
|
|
type_info:set_score(100)
|
|
else
|
|
traceError(TRACE_ERROR, TRACE_CONSOLE, "Unknown alert type " .. (alert.alert_id or ""))
|
|
end
|
|
|
|
return entity_info, type_info
|
|
end
|
|
|
|
-- ##############################################
|
|
|
|
-- @brief Process notifications arriving from the internal C queue
|
|
-- Such notifications are transformed into stored alerts
|
|
function alert_utils.process_notifications_from_c_queue()
|
|
local budget = 1024 -- maximum 1024 alerts per call
|
|
local budget_used = 0
|
|
|
|
-- Check for alerts pushed by the datapath to an internal queue (from C)
|
|
-- and store them (push them to the SQLite and Notification queues).
|
|
-- NOTE: this is executed in a system VM, with no interfaces references
|
|
while budget_used <= budget do
|
|
local alert = ntop.popInternalAlerts()
|
|
|
|
if alert == nil then
|
|
break
|
|
end
|
|
|
|
if(verbose) then tprint(alert) end
|
|
|
|
local entity_info, type_info = processStoreAlertFromQueue(alert)
|
|
|
|
if type_info and entity_info then
|
|
type_info:store(entity_info)
|
|
end
|
|
|
|
|
|
budget_used = budget_used + 1
|
|
end
|
|
end
|
|
|
|
-- ##############################################
|
|
|
|
local function notify_ntopng_status(started)
|
|
local info = ntop.getInfo()
|
|
local score = 10
|
|
local msg
|
|
local msg_details = string.format("%s v.%s (%s) [OS: %s][pid: %s][options: %s]", info.product, info.version, info.revision, info.OS, info.pid, info.command_line)
|
|
local anomalous = false
|
|
local event
|
|
|
|
if(started) then
|
|
|
|
-- reading current version and last version to check if it has been updated
|
|
local last_version_key = "ntopng.updates.last_version"
|
|
local last_version = ntop.getCache(last_version_key)
|
|
local curr_version = info["version"].."-"..info["revision"]
|
|
ntop.setCache(last_version_key, curr_version)
|
|
|
|
-- let's check if we are restarting from an anomalous termination
|
|
-- e.g., from a crash
|
|
if not recovery_utils.check_clean_shutdown() then
|
|
-- anomalous termination
|
|
msg = string.format("%s %s", i18n("alert_messages.ntopng_anomalous_termination", {url="https://www.ntop.org/support/need-help-2/need-help/"}), msg_details)
|
|
score = 100
|
|
anomalous = true
|
|
event = "anomalous_termination"
|
|
elseif not isEmptyString(last_version) and last_version ~= curr_version then
|
|
-- software update
|
|
msg = string.format("%s %s", i18n("alert_messages.ntopng_update"), msg_details)
|
|
event = "update"
|
|
else
|
|
-- normal termination
|
|
msg = string.format("%s %s", i18n("alert_messages.ntopng_start"), msg_details)
|
|
event = "start"
|
|
end
|
|
else
|
|
msg = string.format("%s %s", i18n("alert_messages.ntopng_stop"), msg_details)
|
|
event = "stop"
|
|
end
|
|
|
|
local entity_value = ntop.getInfo().product
|
|
|
|
obj = {
|
|
entity_id = alerts_api.systemEntity(entity_value), entity_val = entity_value,
|
|
type = alert_consts.alertType("alert_process_notification"),
|
|
score = score,
|
|
message = msg,
|
|
when = os.time() }
|
|
|
|
if anomalous then
|
|
telemetry_utils.notify(obj)
|
|
end
|
|
|
|
local entity_info = alerts_api.systemEntity(entity_value)
|
|
local type_info = alert_consts.alert_types.alert_process_notification.new(
|
|
event,
|
|
msg_details
|
|
)
|
|
|
|
type_info:set_score(score)
|
|
|
|
return(type_info:store(entity_info))
|
|
end
|
|
|
|
function alert_utils.notify_ntopng_start()
|
|
return(notify_ntopng_status(true))
|
|
end
|
|
|
|
function alert_utils.notify_ntopng_stop()
|
|
return(notify_ntopng_status(false))
|
|
end
|
|
|
|
return alert_utils
|