luasocket/samples/daytimeclnt.lua

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-----------------------------------------------------------------------------
-- UDP sample: daytime protocol client
-- LuaSocket sample files
-- Author: Diego Nehab
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-- RCS ID: $Id: daytimeclnt.lua,v 1.11 2004/06/21 06:07:57 diego Exp $
-----------------------------------------------------------------------------
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local socket = require"socket"
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host = host or "127.0.0.1"
port = port or 13
if arg then
host = arg[1] or host
port = arg[2] or port
end
host = socket.dns.toip(host)
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udp = socket.udp()
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print("Using host '" ..host.. "' and port " ..port.. "...")
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udp:setpeername(host, port)
udp:settimeout(3)
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sent, err = udp:send("anything")
if err then print(err) os.exit() end
dgram, err = udp:receive()
if not dgram then print(err) os.exit() end
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io.write(dgram)