Solved

IP Number to IP address

Posted on 2006-11-16
1
939 Views
Last Modified: 2008-01-09
I need a function that converts ip numer into IP address.

ipnum = 16777216*w + 65536*x + 256*y + z
where
IP Address = w.x.y.z
0
Comment
Question by:mxpoint
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 10

Accepted Solution

by:
bchoor earned 125 total points
ID: 17963112
I'm pretty sure there are several other ways this can be done --

you can just shift, multiply and subtract

w = ipnum >> 24
ipnum = ipnum - (w * 2^24)
x = ipnum >> 16
ipnum = ipnum - (x * 2^16)
I posted an example at the bottom of this post
and so forth

or Maybe something like this
    Public Function IpNumberToIpAddress(ByVal IpNumber As Int64) As Integer()
        Dim IpAddress As New ArrayList

        For Each m As Match In Regex.Matches(IpNumber.ToString("x0").ToUpper(), "[\dA-F]{2}")
            IpAddress.Add(CType("&H" & m.Value, Integer))
        Next

        Return IpAddress.ToArray(GetType(System.Int32))
    End Function

Usage:
?IpNumberToIpAddress(3232235521.0)
{Length=4}
    (0): 192
    (1): 168
    (2): 0
    (3): 1


    Public Function IpNumberToIpAddress2(ByVal IpNumber As Int64) As Integer()
        Dim IpAddress As New ArrayList
        Dim v As Integer = 0

        v = IpNumber >> 24
        IpAddress.Add(v)
        IpNumber = IpNumber - (v * 2 ^ 24)

        v = IpNumber >> 16
        IpAddress.Add(v)
        IpNumber = IpNumber - (v * 2 ^ 16)

        v = IpNumber >> 8
        IpAddress.Add(v)
        IpNumber = IpNumber - (v * 2 ^ 8)

        v = IpNumber
        IpAddress.Add(v)

        Return IpAddress.ToArray(GetType(System.Int32))
    End Function
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: jpaulino
XML Literals are a great way to handle XML files and the community doesn’t use it as much as it should.  An XML Literal is like a String (http://msdn.microsoft.com/en-us/library/system.string.aspx) Literal, only instead of starting and ending with w…
A while ago, I was working on a Windows Forms application and I needed a special label control with reflection (glass) effect to show some titles in a stylish way. I've always enjoyed working with graphics, but it's never too clever to re-invent …
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…

696 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question