who is 规格严格

代码：

--[[
   whois 的Lua实现
   whois 服务器协议:
       WHOIS协议
       客户端向服务器43端口建议TCP连接
       发送查询IP地址并加上一个回车'\n'字符
       例如: 发送"60.28.14.159\n"，服务器即返回该ip的注册信息
   Version: 0.1 by hqwfreefly
--]]
require("socket")
local tcp = socket.tcp()
assert(tcp, "Create TCP master object error")
local WHOIS_SERVER = "wq.apnic.net"
local WHOIS_PORT = 43
if not arg[1] then print("Usage: lua whois.lua [hostname | ipaddress]") os.exit(1) end
local ip = socket.dns.toip(arg[1])
if not ip then print("hostname error") os.exit(1) end
local ret = tcp:connect(WHOIS_SERVER, WHOIS_PORT)
if not ret then print("Unable to connect to whois-server: ", WHOIS_SERVER) os.exit(1) end
tcp:send(ip .. "\n")
local info = tcp:receive("*all")
print(info)
tcp:close()