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参考 http://mryufeng.iteye.com/blog/366761

http://erlangcentral.org/wiki/index.php/Building_a_Non-blocking_TCP_server_using_OTP_principles

http://www.cnblogs.com/bicowang/p/3976129.html

client: {ok,S} = gen_tcp:connect({127,0,0,1},2222,[{packet,2}]). gen_tcp:send(S, <<4:16, 10000:16, >>).