зеркало из https://github.com/mozilla/MozDef.git
99 строки
3.6 KiB
Lua
99 строки
3.6 KiB
Lua
-- This Source Code Form is subject to the terms of the Mozilla Public
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-- License, v. 2.0. If a copy of the MPL was not distributed with this
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-- file, You can obtain one at http://mozilla.org/MPL/2.0/.
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-- Copyright (c) 2014 Mozilla Corporation
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--
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-- Contributors:
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-- Anthony Verez averez@mozilla.com
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-- Jeff Bryner jbryner@mozilla.com
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-- Michal Purzynski mpurzynski@mozilla.com
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local l=require "lpeg"
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local string=require "string"
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l.locale(l) --add locale entries in the lpeg table
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local space = l.space^0 --define a space constant
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local sep = l.P"\t"
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local elem = l.C((1-sep)^0)
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grammar = l.Ct(elem * (sep * elem)^0) -- split on tabs, return as table
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function toString(value)
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if value == "-" then
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return ""
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end
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return value
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end
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function toNumber(value)
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if value == "-" then
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return 0
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end
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return tonumber(value)
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end
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function lastField(value)
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-- remove last "\n" if there's one
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if value ~= nil and string.len(value) > 1 and string.sub(value, -2) == "\n" then
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return string.sub(value, 1, -2)
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end
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return value
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end
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function process_message()
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local log = read_message("Payload")
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--set a default msg that heka's
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--message matcher can ignore via a message matcher:
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-- message_matcher = "( Type!='heka.all-report' && Type != 'IGNORE' )"
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local msg = {
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Type = "IGNORE",
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Fields={}
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}
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local matches = grammar:match(log)
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if not matches then
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--return 0 to not propogate errors to heka's log.
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--return a message with IGNORE type to not match heka's message matcher
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inject_message(msg)
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return 0
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end
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if string.sub(log,1,1)=='#' then
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--it's a comment line
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inject_message(msg)
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return 0
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end
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if matches[8] == "dns" then
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inject_message(msg)
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return 0
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end
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msg['Type']='broconnection'
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msg['Logger']='nsm'
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msg['ts'] = toString(matches[1])
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msg.Fields['uid'] = toString(matches[2])
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msg.Fields['sourceipaddress'] = toString(matches[3])
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msg.Fields['sourceport'] = toNumber(matches[4])
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msg.Fields['destinationipaddress'] = toString(matches[5])
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msg.Fields['destinationport'] = toNumber(matches[6])
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msg.Fields['protocol'] = toString(matches[7])
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msg.Fields['service'] = toString(matches[8])
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msg.Fields['duration_float'] = toNumber(matches[9])
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msg.Fields['originbytes_int'] = toNumber(matches[10])
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msg.Fields['responsebytes_int'] = toNumber(matches[11])
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msg.Fields['connectionstate'] = toString(matches[12])
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msg.Fields['local_origin'] = toString(matches[13])
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msg.Fields['local_resp'] = toString(matches[14])
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msg.Fields['missedbytes_int'] = toNumber(matches[15])
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msg.Fields['history'] = toString(matches[16])
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msg.Fields['originpkts_int'] = toNumber(matches[17])
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msg.Fields['originipbytes_int'] = toNumber(matches[18])
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msg.Fields['responsepackets_int'] = toNumber(matches[19])
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msg.Fields['responseipbytes_int'] = toNumber(matches[20])
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msg.Fields['tunnelparents'] = toString(matches[21])
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msg.Fields['orig_cc'] = toString(matches[22])
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msg.Fields['resp_cc'] = toString(matches[23])
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msg.Fields['peername'] = lastField(toString(matches[24]))
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msg['Payload'] = toString(msg.Fields['sourceipaddress']) .. ":" .. toString(msg.Fields['sourceport']) .. " -> " .. toString(msg.Fields['destinationipaddress']) .. ":" .. toString(msg.Fields['destinationport']) .. " " .. toString(msg.Fields['history']) .. " " .. toString(msg.Fields['originipbytes_int']) .. " bytes / " .. toString(msg.Fields['responseipbytes_int']) .. " bytes"
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inject_message(msg)
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return 0
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end
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