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--
-- (C) 2017-22 - ntop.org
--
--
-- https://www.internetsociety.org/resources/doc/2016/overview-of-the-digital-object-architecture-doa/
-- https://tools.ietf.org/id/draft-durand-object-exchange-00.html
--
-- Update DNS with command
-- nsupdate -k Kntop.org.+157+16148.private -v /tmp/ox.update
--
local base64 = require "base64"
local ox = {}
local function initOX(path)
return(io.open(path, "w"))
end
ox.init = initOX
local function printOXHeader(fd)
fd:write("server localhost\n")
fd:write("zone ntop.org.\n")
end
ox.header = printOXHeader
local function printOXFooter(fd)
fd:write("send\n")
end
ox.footer = printOXFooter
local function device2OX(fd, dev)
-- update add FE5400577C58.ntop.org. 3600 IN OX 35632 1 1 "text/plain" c2FtcGxlIERPQSB0ZXh0IHJlY29yZA==
local mac = dev.mac:gsub(":", "")
local base_string = "update add ".. mac ..".ntop.org 3600 IN OX 35632 "
local v
-- Delete record first
fd:write("update delete ".. mac ..".ntop.org. OX\n")
-- 101 - Operating System
if(dev.operatingSystem ~= nil) then
fd:write(base_string.."101 1 \"text/plain\" "..base64.enc(dev.operatingSystem).."\n")
end
-- 102 - Device Type
if(dev.device_type ~= nil) then
fd:write(base_string.."102 1 \"text/plain\" "..base64.enc(dev.device_type).."\n")
end
-- 103 - Device (Symbolic) Name
if(dev.sym ~= nil) then
v = dev.sym
elseif(dev.symIP ~= nil) then
v = dev.symIP
else
v = nil
end
if(v ~= nil) then
fd:write(base_string.."103 1 \"text/plain\" "..base64.enc(v).."\n")
end
-- 104 - Provided services (SSDP)
if(dev.information ~= nil) then
v = table.concat(dev.information, ",")
if(v ~= "") then
fd:write(base_string.."104 1 \"text/plain\" "..base64.enc(table.concat(dev.information, ",")).."\n")
end
end
-- 105 - Description
if((dev.device_info ~= nil) and (dev.device_info ~= "")) then
-- io.write("=========> [device_info] "..dev.device_info.."\n")
fd:write(base_string.."105 2 \"text/plain\" "..base64.enc(dev.device_info).."\n")
end
-- 106 - (SSDP) URL
if(dev.url ~= nil) then
fd:write(base_string.."106 2 \"text/plain\" "..base64.enc(dev.url).."\n")
end
end
ox.device2OX = device2OX
local function termOX(fd)
fd:close()
end
ox.term = termOX
return ox
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