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comp.lang.ruby

inet_addr inet_ntoa

Rick Fiorentino

5/30/2007 6:18:00 PM

Hi All,

I tried looking up answers for this with little success...any help is
appreciated, bear with my newness to Ruby.

The application I am working on can store ip addresses in a DB. They are
accessed by different platforms so the plan is to store IPs in network
order and display as host order.

I cannot find the following routines in ruby land to aid with the
process:

inet_addr - to store the IP as network ordered
inet_ntoa - to retrieve the IP as host ordered

How do people deal with these conversions? I assume dealing with Endian
issues affects several of you folks?

Any help is greatly appreciated...sorry if this has been covered before.

Thanks,
Rick

--
Posted via http://www.ruby-....

2 Answers

Luis Parravicini

5/30/2007 6:44:00 PM

0

Hi

On 5/30/07, Rick Fiorentino <rfiorentino@charter.net> wrote:
> I cannot find the following routines in ruby land to aid with the
> process:
>
> inet_addr - to store the IP as network ordered

You can get the ip in network order using Socket.gethostbyname
(http://www.ruby-doc.org/core/classes/Socket.ht...)


--
Luis Parravicini
http://ktulu.co...

Brian Candler

5/30/2007 8:18:00 PM

0

On Thu, May 31, 2007 at 03:17:57AM +0900, Rick Fiorentino wrote:
> Hi All,
>
> I tried looking up answers for this with little success...any help is
> appreciated, bear with my newness to Ruby.
>
> The application I am working on can store ip addresses in a DB. They are
> accessed by different platforms so the plan is to store IPs in network
> order and display as host order.
>
> I cannot find the following routines in ruby land to aid with the
> process:
>
> inet_addr - to store the IP as network ordered
> inet_ntoa - to retrieve the IP as host ordered
>
> How do people deal with these conversions? I assume dealing with Endian
> issues affects several of you folks?
>
> Any help is greatly appreciated...sorry if this has been covered before.

Look at:

ri Array#pack
ri String#unpack

In particular, conversion "N" will pack as four bytes in network order
(big-endian)