如何查看哪个 IP 地址是 "bigger"

Question

如果我有一个 IP 地址范围（例如 192.168.0.0 - 192.168.0.255）并且我正在向上计数（比如按随机数递增），我如何确定我是否超出了该范围？

Answer 1

           '''<summary>Checks if IP Address A is larger than IP Address B. Returns True if A is larger, returns False if B is larger.</summary>

Private Function Check_If_Larger(ByVal IP_Address_A As Net.IPAddress, ByVal IP_Address_B As Net.IPAddress) As Boolean
    Dim IP_Address_A_Split() As String = IP_Address_A.ToString.Split("."c)
    Dim IP_Address_B_Split() As String = IP_Address_B.ToString.Split("."c)
    Dim IP_Address_A_Score As Integer = 0
    Dim IP_Address_B_Score As Integer = 0

    For i As Integer = 0 To IP_Address_A_Split.Length - 1
        If Convert.ToInt32(IP_Address_A_Split(i)) > Convert.ToInt32(IP_Address_B_Split(i)) Then
            IP_Address_A_Score += 1
        ElseIf Convert.ToInt32(IP_Address_B_Split(i)) > Convert.ToInt32(IP_Address_A_Split(i)) Then
            IP_Address_B_Score += 1
        End If
    Next
    If IP_Address_A_Score > IP_Address_B_Score Then
        Return True
    Else
        Return False
    End If
End Function

Answer 2

我相信 ip 地址中有一个值的层次结构，从右到左越来越大。即最左边的值比最右边的值更重要，并且对 ip 地址的大小有更大的影响。例如。 192.168.1.0 大于 192.168.0.255

根据层次结构分配分数会有所帮助。例如

Private Function Max(A As String, B As String) As String
    Dim AA() As String = A.Split(".")
    Dim BB() As String = B.Split(".")
    Dim A_Score As Integer = 0
    Dim B_Score As Integer = 0
    For i = 0 To AA.Length - 1
        If AA(i) > BB(i) Then
            A_Score += AA.Length - i
        ElseIf BB(i) > AA(i) Then
            B_Score += BB.Length - i
        End If
    Next
    If A_Score > B_Score Then
        Return A
    ElseIf B_Score > A_Score Then
        Return B
    Else
        Return ""
    End If
End Function

Answer 3

简单地将IP地址转换为数字并比较数字。

    Dim ipmax As Net.IPAddress = Net.IPAddress.Parse("192.168.0.255")
    Dim ip1 As Net.IPAddress = Net.IPAddress.Parse("192.168.1.0")

    Dim ipmaxAsNum As UInt32 = BitConverter.ToUInt32(ipmax.GetAddressBytes.Reverse.ToArray, 0)
    Dim ip1AsNum As UInt32 = BitConverter.ToUInt32(ip1.GetAddressBytes.Reverse.ToArray, 0)

    If ip1AsNum > ipmaxAsNum Then
        Stop
    Else
        Stop
    End If

如何查看哪个 IP 地址是 "bigger"

How to see which IP address is "bigger"

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