使用端口号对IPv4地址进行排序 [英] Sorting IPv4 address with port number

问题描述

我正在尝试更改其中包含端口号的IP地址字符串，以便对表进行排序，例如IP字符串示例:

I'm trying to alter an IP address string that has a port number in it so to sort a table, an example IP string:

 IP = "120.88.66.99:075"

我可以使用以下方法删除.和::

I can remove the .'s and the : with:

 IP = string.gsub(IP,'%W',"")

这给了我120886699075，但是我想将唯一的:更改为.，所以它给了我120886699.075

and that gives me 120886699075 but I would like to change the only : to a . so it gives me 120886699.075

实际上，我想要的是不起作用，因为它没有考虑.之间的数字，所以我想要的是一种按给定格式对ip进行排序的方法，因此包含原始ip的表字符串可以排序.

Actually what I wanted is not working as it does not take in to account the number of numbers between the .'s so what I woulds like is a way to sort the ip in the given format so a table containing the original ip string can be sorted.

我几乎可以与此相关:

 function IPToDec(IPs)
  local t = {}
  local f = "(.-)%."
  local l = 1;
  local s, e, c = IPs:find(f,1)
  while s do
    if s ~= 1 or c ~= "" then
     table.insert(t,c)
    end
    l = e+1;
    s, e, c = IPs:find(f,l)
  end
  if l <= #IPs then
    c = IPs:sub(l)
    table.insert(t,c)
  end
  if(#t == 4) then
    return 16777216*t[1] + 65536*t[2] + 256*t[3] + t[4]
  else
    return -1
  end
 end

 IP = "120.88.66.99:075"
 IP = IPToDec(IP:gsub('%:+'..'%w+',""))

但是我必须放松端口以使其正确排序，理想情况下，我想在排序中包括端口号，因为IP可能来自相同的来源，但来自不同的计算机. /p>

but I'm having to loose the port to get it to sort properly, ideally I would like to include the port number in the sorting because it might be possible that the ip's are coming from the same source but different computers.

推荐答案

最简单的解决方案是使用两种模式:

The most simple solution is to use two patterns:

IP = IP:gsub("%.", ""):gsub(":", ".")

第一个gsub用空字符串替换.，第二个将:替换为.

The first gsub replaces . with an empty string, the second one replaces : to .

也可以使用一个呼叫gsub.使用辅助表作为第二个参数，如下所示:

Using one call to gsub is also possible. Use an auxiliary table as the second argument like this:

 IP = IP:gsub("%W", {["."] = "", [":"] = "."})

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