测试一个IP地址是否在.net的地址范围内

Question

.NET有IP地址范围的概念吗?

我需要测试一个给定的IP地址是否在地址范围内。

我可以写一些API让我得到像

这样的东西

IPRange ipRange = IPRange.Parse("127.0.0.1-127.0.0.15");
ipRange.Contains(someAddress);

，但我不想重新发明轮子，如果已经有类似的功能内置。

Answer 1

不，但这里是如何做到的(VB因为代码标签不包括在OP中)

'test values
Dim rangeStart As Net.IPAddress = Net.IPAddress.Parse("192.168.133.1")
Dim rangeEnd As Net.IPAddress = Net.IPAddress.Parse("192.168.133.254")
Dim check As Net.IPAddress = Net.IPAddress.Parse("192.168.133.230")
'get the bytes of the address
Dim rbs() As Byte = rangeStart.GetAddressBytes
Dim rbe() As Byte = rangeEnd.GetAddressBytes
Dim cb() As Byte = check.GetAddressBytes
'reverse them for conversion
Array.Reverse(rbs)
Array.Reverse(rbe)
Array.Reverse(cb)
'convert them
Dim rs As UInt32 = BitConverter.ToUInt32(rbs, 0)
Dim re As UInt32 = BitConverter.ToUInt32(rbe, 0)
Dim chk As UInt32 = BitConverter.ToUInt32(cb, 0)
'check
If chk >= rs AndAlso chk <= re Then
    Debug.WriteLine("In Range")
Else
    Debug.WriteLine("Not In Range")
End If

Answer 2

下面是dbasnett对c#的回答的快速翻译:

public static bool IsIPInRange(string ip, string ipStart, string ipEnd)
{
    var pIP = IPAddress.Parse(ip);
    var pIPStart = IPAddress.Parse(ipStart);
    var pIPEnd = IPAddress.Parse(ipEnd);
    var bIP = pIP.GetAddressBytes().Reverse().ToArray();
    var bIPStart = pIPStart.GetAddressBytes().Reverse().ToArray();
    var bIPEnd = pIPEnd.GetAddressBytes().Reverse().ToArray();
    var uIP = BitConverter.ToUInt32(bIP, 0);
    var uIPStart = BitConverter.ToUInt32(bIPStart, 0);
    var uIPEnd = BitConverter.ToUInt32(bIPEnd, 0);
    return uIP >= uIPStart && uIP <= uIPEnd;
}

这是一个完整的。net Fiddle的例子。

希望这不算跑题。