Re: CIDR Question: How to convert IP Address to CIDR Format

[Kirk Spessard]

Or better example:

   ip := "1.2.3.4"

   mask := 24

And I want to convert this to....  "1.2.3.4/24"

On Wed, Apr 8, 2015 at 2:46 PM, <kspe...@google.com> wrote:

I have an IP address defined as a string and a CIDR based mask defined as an int.  What's the best way to convert the IP address to CIDR format?

For example:

     ip := "1.2.3.4"

     mask := 31

And I want to convert this to....  "1.2.3.4/31"

Kirk 

[kspe...@google.com]

[David Anderson]

cidr := &net.IPNet{net.ParseIP("1.2.3.4"), 24}

fmt.Println(cidr.String())

?

The function signatures are probably slightly wrong, but basically, assemble a net.IPNet by using net.ParseIP, then get the string. And if you have a CIDR network string, net.ParseCIDR will do the reverse.

- Dave

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