65 lines
1.3 KiB
Lua
65 lines
1.3 KiB
Lua
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modem_location = "back"
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rednet.host("lns", "default")
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rednet.open(modem_location)
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local data = {}
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function save_data()
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db = fs.open("lns.db", "w")
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db.write(textutils.serialize(data))
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db.close()
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end
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function load_data()
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if fs.exists("lns.db") then
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db = fs.open("lns.db", "r")
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db_contents = db.readAll()
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db.close()
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data = textutils.unserialize(db_contents)
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end
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end
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function split (inputstr, sep)
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if sep == nil then
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sep = "%s"
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end
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local t={}
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for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
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table.insert(t, str)
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end
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return t
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end
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load_data()
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while true do
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client_id, msg = rednet.receive()
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-- split string msg into action and hostname with ':' as a delimiter using string.unpack
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local action, hostname = split(msg, ":")
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if action == "lookup" then
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-- check if hostname in data
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if data[hostname] == nil then
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rednet.send(client_id, "not found")
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else
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rednet.send(client_id, data[hostname])
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end
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end
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if action == "reload" then
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load_data()
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rednet.send(client_id, "ok")
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end
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if action == "register" then
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data[hostname] = client_id
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save_data()
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rednet.send(client_id, "ok")
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end
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end |