The differences between hash:ip and hash:net.

The differences between hash:ip and hash:net.

[Hongyi Zhao]

Hi all,

From the ipset manpage, I can see the following depictions:

hash:ip
  The  hash:ip  set type uses a hash to store
  IP host addresses (default) or network addresses.

hash:net
  The hash:net set type uses a hash to store different
  sized  IP  network addresses.

So, it seems that both types can be used to store the network addresses.

Hence, my issues are:

1- Since the hash:ip can be used to store both host addresses and network 
addresses, why the developer design another set type hash:net?

2- It's well know that any host addresses can be written into the form of 
the 32-bits cidr prefix form. Since the ipset type hash:net should also 
can be used to store the host addresses and network addresses.

In one word: what's the differences between hash:ip and hash:net?

Regards
-- 
.: Hongyi Zhao [ hongyi.zhao AT gmail.com ] Free as in Freedom :.

Re: The differences between hash:ip and hash:net.

[Jozsef Kadlecsik]

On Wed, 14 Oct 2015, Hongyi Zhao wrote:

> From the ipset manpage, I can see the following depictions:
> 
> hash:ip
>   The  hash:ip  set type uses a hash to store
>   IP host addresses (default) or network addresses.
> 
> hash:net
>   The hash:net set type uses a hash to store different
>   sized  IP  network addresses.
> 
> So, it seems that both types can be used to store the network addresses.
> 
> Hence, my issues are:
> 
> 1- Since the hash:ip can be used to store both host addresses and network 
> addresses, why the developer design another set type hash:net?
> 
> 2- It's well know that any host addresses can be written into the form of 
> the 32-bits cidr prefix form. Since the ipset type hash:net should also 
> can be used to store the host addresses and network addresses.
> 
> In one word: what's the differences between hash:ip and hash:net?

hash:ip can store same size network addresses only (for example all of 
them are /24) while hash:net supports all kind of netblocks (except /0).

Best regards,
Jozsef
-
E-mail  : kadlec@blackhole.kfki.hu, kadlecsik.jozsef@wigner.mta.hu
PGP key : http://www.kfki.hu/~kadlec/pgp_public_key.txt
Address : Wigner Research Centre for Physics, Hungarian Academy of Sciences
          H-1525 Budapest 114, POB. 49, Hungary

Re: The differences between hash:ip and hash:net.

[Hongyi Zhao]

On Wed, 14 Oct 2015 09:41:49 +0200, Jozsef Kadlecsik wrote:

> hash:ip can store same size network addresses only (for example all of
> them are /24) while hash:net supports all kind of netblocks (except /0).

Thanks a lot for your notes.

> 
> Best regards,
> Jozsef
-- 
.: Hongyi Zhao [ hongyi.zhao AT gmail.com ] Free as in Freedom :.