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annotate samples/echosrvr.lua @ 0:4b915342e2a8

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LuaSocket 2.0.2 + CMake build description.
author Eric Wing <ewing . public |-at-| gmail . com>
date Tue, 26 Aug 2008 18:40:01 -0700
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4b915342e2a8 LuaSocket 2.0.2 + CMake build description.
Eric Wing <ewing . public |-at-| gmail . com>
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1 -----------------------------------------------------------------------------
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2 -- UDP sample: echo protocol server
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3 -- LuaSocket sample files
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4 -- Author: Diego Nehab
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5 -- RCS ID: $Id: echosrvr.lua,v 1.12 2005/11/22 08:33:29 diego Exp $
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6 -----------------------------------------------------------------------------
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7 local socket = require("socket")
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8 host = host or "127.0.0.1"
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9 port = port or 7
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10 if arg then
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11 host = arg[1] or host
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12 port = arg[2] or port
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13 end
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14 print("Binding to host '" ..host.. "' and port " ..port.. "...")
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15 udp = assert(socket.udp())
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16 assert(udp:setsockname(host, port))
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17 assert(udp:settimeout(5))
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18 ip, port = udp:getsockname()
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19 assert(ip, port)
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20 print("Waiting packets on " .. ip .. ":" .. port .. "...")
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21 while 1 do
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22 dgram, ip, port = udp:receivefrom()
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23 if dgram then
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24 print("Echoing '" .. dgram .. "' to " .. ip .. ":" .. port)
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25 udp:sendto(dgram, ip, port)
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26 else
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27 print(ip)
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28 end
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29 end