luasocket/samples/echoclnt.lua

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-----------------------------------------------------------------------------
-- UDP sample: echo protocol client
-- LuaSocket sample files
-- Author: Diego Nehab
-----------------------------------------------------------------------------
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local socket = require("socket")
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host = host or "localhost"
port = port or 7
if arg then
host = arg[1] or host
port = arg[2] or port
end
host = socket.dns.toip(host)
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udp = assert(socket.udp())
assert(udp:setpeername(host, port))
print("Using remote host '" ..host.. "' and port " .. port .. "...")
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while 1 do
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line = io.read()
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if not line or line == "" then os.exit() end
assert(udp:send(line))
dgram = assert(udp:receive())
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print(dgram)
end