61 lines
1.6 KiB
Lua
61 lines
1.6 KiB
Lua
local event = require("event")
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local minitel = require("minitel")
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local serialization = require("serialization")
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local PORT = 5353
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local LOCAL_DOMAIN = "home1" -- oder "home1.net"
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local records = {}
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local running = true
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print("[ocsense] DNS/UUID-Server gestartet auf port " .. PORT)
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print("[ocsense] Strg+C zum Beenden")
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local function stripLocalDomain(name)
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if name:sub(-#LOCAL_DOMAIN) == LOCAL_DOMAIN then
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local dot = name:sub(-( #LOCAL_DOMAIN + 1 ), -( #LOCAL_DOMAIN + 1 ))
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if dot == "." then
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return name:sub(1, -( #LOCAL_DOMAIN + 2 ))
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else
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return name:sub(1, -( #LOCAL_DOMAIN + 1 ))
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end
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end
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return name
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end
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while running do
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local ev, fromName, port, data, fromAddr = event.pull()
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if ev == "interrupted" then
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print("[ocsense] beendet durch Strg+C")
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running = false
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elseif ev == "net_msg" and port == PORT and type(data) == "string" then
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local cmd, a, b = data:match("^(%S+)%s*(%S*)%s*(%S*)")
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if cmd == "REG" and a ~= "" and b ~= "" then
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-- a = hostname, b = hardware UUID
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records[a] = b
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print("[ocsense] REG", a, "=>", b)
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elseif cmd == "Q" and a ~= "" then
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local replyto = (b ~= "" and b) or fromName
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local addr = records[a]
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-- lokale Domain abstreifen, falls nötig
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if not addr then
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local short = stripLocalDomain(a)
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if short ~= a then
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addr = records[short]
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end
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end
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if addr then
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minitel.usend(replyto, PORT, "A " .. a .. " " .. addr)
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print("[ocsense] A", a, "->", addr)
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else
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minitel.usend(replyto, PORT, "NX " .. a)
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print("[ocsense] NX", a)
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end
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end
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end
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end
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