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123 lines
3.6 KiB
Lua
123 lines
3.6 KiB
Lua
--
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-- (C) 2013-21 - 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/?.lua;" .. package.path
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package.path = dirs.installdir .. "/scripts/lua/modules/alert_store/?.lua;" .. package.path
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local alert_utils = require "alert_utils"
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local alert_consts = require "alert_consts"
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local alert_entities = require "alert_entities"
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local rest_utils = require("rest_utils")
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local alert_severities = require "alert_severities"
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local auth = require "auth"
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-- local flow_alert_store = require "flow_alert_store".new()
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-- local host_alert_store = require "host_alert_store".new()
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--
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-- Read alerts data as timeseries (number of alerts per hour)
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-- Example: curl -u admin:admin -H "Content-Type: application/json" -d '{"ifid": "6", "status": "historical-flows", "epoch_begin": 1590226522, "epoch_end": 1590485722}' http://localhost:3000/lua/rest/v1/get/alert/ts.lua
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--
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-- NOTE: in case of invalid login, no error is returned but redirected to login
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--
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sendHTTPHeader('application/json')
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local rc = rest_utils.consts.success.ok
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local res = {}
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local ifid = _GET["ifid"]
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local what = _GET["status"] -- historical, historical-flows
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local epoch_begin = _GET["epoch_begin"]
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local epoch_end = _GET["epoch_end"]
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local alert_type = _GET["alert_type"]
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local alert_severity = _GET["alert_severity"]
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local host_info = url2hostinfo(_GET)
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if not auth.has_capability(auth.capabilities.alerts) then
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rest_utils.answer(rest_utils.consts.err.not_granted)
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return
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end
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if isEmptyString(ifid) then
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rc = rest_utils.consts.err.invalid_interface
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rest_utils.answer(rc)
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return
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end
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interface.select(ifid)
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if isEmptyString(what) then
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rc = rest_utils.consts.err.invalid_args
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print(rest_utils.rc(rc))
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return
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end
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if isEmptyString(epoch_begin) or isEmptyString(epoch_end) then
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rc = rest_utils.consts.err.invalid_args
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print(rest_utils.rc(rc))
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return
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end
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epoch_begin = tonumber(epoch_begin);
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epoch_end = tonumber(epoch_end);
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if epoch_end <= epoch_begin then
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rc = rest_utils.consts.err.invalid_args
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print(rest_utils.rc(rc))
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return
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end
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local hour_secs = 60*60
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local day_secs = 60*60*24
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-- Round begin to start of day
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epoch_begin = epoch_begin - (epoch_begin % day_secs)
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-- Round end to end of day
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epoch_end = epoch_end - (epoch_end % day_secs) + day_secs
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local days = (epoch_end - epoch_begin) / day_secs
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local engaged = false
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if what == "engaged" then
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engaged = true
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end
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for day = 1, days do
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local day_epoch = epoch_begin + ((day - 1) * day_secs)
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res[day_epoch] = {
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0, --[[ Counter for alerts between 00:00 and 00:59 UTC --]]
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0, --[[ Counter for alerts between 01:00 and 01:59 UTC --]]
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 --[[ Counter for alerts in other hours, until 23:00 to 23:59 --]]
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}
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end
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--[[
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This API is no longer supported - returning 0 counters for the time being
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local counters = alert_utils.getNumAlertsPerHour(what, epoch_begin, epoch_end, alert_type, alert_severity, host_info)
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if counters == nil then
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rc = rest_utils.consts.err.internal_error
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print(rest_utils.rc(rc))
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return
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end
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for k,v in ipairs(counters) do
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-- Midnight UTC of the day containing v.hour
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local day_epoch = v.hour - (v.hour % day_secs)
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-- Hour of the day containing v.hour, from 0 to 23, inclusive
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-- NOTE: Use the `floor` to make sure hour is an integer as it will be used to index a Lua array
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local hour = math.floor((v.hour - day_epoch) / hour_secs)
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-- Here we add 1 to the hour as Lua array are indexed starting from 1, whereas `hour` is an integer starting from zero
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res[day_epoch][hour + 1] = tonumber(v.count)
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end -- for
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--]]
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print(rest_utils.rc(rc, res))
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