将数字转换为 IP 地址 (v4)

Question

我正在尝试将四位数字转换为 IP 地址。例如：

0001 ---> *.192.1.01

0011 ---> *.192.11.01

0111 ---> *.192.111.01

1111 ---> *.196.87.01

3458 ---> *.205.130.01

我相信子网掩码是 255.255.192.0。

我将非常感谢在 vb.net.

中提供有关最佳执行方法的任何建议

其他信息：

这是一个简单的 pinger 程序，用户输入一个四位数字（他们希望 ping 的物理站点的 ID）。IP 寻址方案很简单，第二个和第三个八位字节用作站点编号，第四个八位字节用作站点的设备。我没有设计这个方案，因此我不确定如何让 vb.net 理解它。

我尝试过的：

我想到了下面的方法，非常粗糙。但是，这最多只能工作到 *.192.255.01，因为我不知道如何在八位字节 3 中超过 255 时将两个八位字节之间的数字分开。

Private Sub btnStartPing(sender As Object, e As EventArgs) Handles btnStartPing.Click

    Dim Octet1 As Integer = *
    Dim Octet2 As Integer = 192
    Dim Octet3 As Integer = txtSiteID.text
    Dim Octet4 As Integer = 01
    Dim CompleteIP As String = ""

    CompletIP = Octet1 & "." & Octet2  & "." & Octet3 & "." & Octet4 

    'PING CompleteIP

end sub

解法：

        Dim var1 As Integer = Fix(192 + (NumericUpDown1.Value / 256))
        Dim var2 As Integer = Fix((NumericUpDown1.Value Mod 256))

        MsgBox("Your IP address is: " & "10." & var1 & "." & var2 & "." & "200")
    End Sub

Answer 1

您需要将号码一分为二。取前半位加192后半位直接用

    Dim number As Integer

    number = 1
    Console.WriteLine("*.{0}.{1}.01", 192 + ((number And &HFF00) >> 8), number And &HFF) ' *.192.1.01

    number = 11
    Console.WriteLine("*.{0}.{1}.01", 192 + ((number And &HFF00) >> 8), number And &HFF) ' *.192.11.01

    number = 111
    Console.WriteLine("*.{0}.{1}.01", 192 + ((number And &HFF00) >> 8), number And &HFF) ' *.192.111.01

    number = 1111
    Console.WriteLine("*.{0}.{1}.01", 192 + ((number And &HFF00) >> 8), number And &HFF) ' *.196.87.01

    number = 3458
    Console.WriteLine("*.{0}.{1}.01", 192 + ((number And &HFF00) >> 8), number And &HFF) ' *.205.130.01

取号并将其一分为二

3458 = 0x0D82

0x0D
0x82

然后在第一部分加上192

0x0D + 192 = 205
0x82 = 130

Answer 2

这应该可以

Public Function StartPing(txtSiteId As String) As String
    Dim SiteId As Integer = Integer.Parse(txtSiteId)

    'backslash performs integer division (no fractionary part)
    'will throw an error when SiteId results in values greater than 255
    'type Byte allows only values from 0 to 255
    Dim Octet2 As Byte = 192 + (SiteId \ 256)

    'Mod gets rest of division
    Dim Octet3 As Byte = SiteId Mod 256

    Return String.Format("*.{0}.{1}.01", Octet2, Octet3)
End Function

将数字转换为 IP 地址 (v4)

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