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Implements host lambda functions

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This commit is contained in:
Simone Mainardi 2019-07-08 12:21:37 +02:00
parent 5d99489d70
commit 8ad9e6b336
2 changed files with 100 additions and 87 deletions
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95
scripts/callbacks/interface/alerts/host/check.lua Normal file
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--
-- (C) 2019 - ntop.org
--
local check = {}
-- #################################################################
local function cached_val_key(metric_name, granularity)
return string.format("%s:%s", metric_name, granularity)
end
-- #################################################################
local function delta_val(metric_name, granularity, curr_val)
local key = cached_val_key(metric_name, granularity)
-- Read cached value and purify it
local prev_val = host.getCachedAlertValue(key)
prev_val = tonumber(prev_val) or 0
-- Save the value for the next round
host.setCachedAlertValue(key, tostring(curr_val))
-- Compute the delta
return curr_val - prev_val
end
-- #################################################################
local function application_bytes(info, application_name)
local curr_val = 0
if info["ndpi"] and info["ndpi"][application_name] then
curr_val = info["ndpi"][application_name]["bytes.sent"] + info["ndpi"][application_name]["bytes.rcvd"]
end
return curr_val
end
-- #################################################################
function check.active(metric_name, info, granularity)
return delta_val(metric_name, granularity, info["total_activity_time"])
end
-- #################################################################
function check.bytes(metric_name, info, granularity)
return delta_val(metric_name, granularity, info["bytes.sent"] + info["bytes.rcvd"])
end
-- #################################################################
function check.packets(metric_name, info, granularity)
return delta_val(metric_name, granularity, info["packets.sent"] + info["packets.rcvd"])
end
-- #################################################################
function check.flows(metric_name, info, granularity)
return delta_val(metric_name, granularity, info["total_flows.as_client"] + info["total_flows.as_server"])
end
-- #################################################################
function check.idle(metric_name, info, granularity)
return delta_val(metric_name, granularity, os.time() - info["seen.last"])
end
-- #################################################################
function check.dns(metric_name, info, granularity)
return delta_val(metric_name, granularity, application_bytes(info, "DNS"))
end
-- #################################################################
function check.p2p(metric_name, info, granularity)
local tot_p2p = application_bytes(info, "eDonkey") + application_bytes(info, "BitTorrent") + application_bytes(info, "Skype")
return delta_val(metric_name, granularity, tot_p2p)
end
-- #################################################################
function check.throughput(metric_name, info, granularity)
local duration = granularity2sec(granularity)
return delta_val(metric_name, granularity, info["bytes.sent"] + info["bytes.rcvd"]) * 8 / duration
end
-- #################################################################
return check