39 lines
963 B
Lua
39 lines
963 B
Lua
local event = require("event")
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local minitel = require("minitel")
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local computer = require("computer")
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local target = ...
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if not target then
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io.stderr:write("Usage: resolve <hostname>\n")
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return
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end
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local GATEWAY = "home1"
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local PORT = 5353
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-- eigenen Namen holen
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local f = io.open("/etc/hostname", "r")
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local me = f and f:read("*l") or "client"
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if f then f:close() end
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-- Anfrage senden
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minitel.usend(GATEWAY, PORT, "Q " .. target .. " " .. me)
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-- auf Antwort warten
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local deadline = computer.uptime() + 3
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while computer.uptime() < deadline do
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local _, from, port, data = event.pull(deadline - computer.uptime(), "net_msg")
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if 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 == "A" and a == target then
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print(b) -- b = Hardware-UUID
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return
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elseif cmd == "NX" and a == target then
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print("NXDOMAIN: " .. target)
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return
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end
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end
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end
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print("Timeout")
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