nftables: How to add bordering ip-ranges to a named set

nftables: How to add bordering ip-ranges to a named set

[Matthias Taube]

Hi,

if I define a named set in nftables
> nft 'add set inet filter black2 {type ipv4_addr; flags interval; }'
> nft add element inet filter black2 { 192.168.1.1/24 }

it is not possible to add bordering ip-ranges:
> nft add element inet filter black2 { 192.168.2.1/24 }
> <cmdline>:1:1-49: Error: Could not process rule: File exists
> add element inet filter black2 { 192.168.2.1/24 }
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

but if I add the ranges in ONE command it works:
> nft add element inet filter black2 { 192.168.1.1/24, 192.168.2.1/24 }

then the ranges are put together to one ip-range:
> # nft list set inet filter black2
> table inet filter {
> 	set black2 {
> 		type ipv4_addr
> 		flags interval
> 		elements = { 192.168.1.0-192.168.2.255}
> 	}
> }

How it is possible to create a set to flexible add and delete bordering 
ip-ranges?

mfg
Matthias

Re: nftables: How to add bordering ip-ranges to a named set

[Pablo Neira Ayuso]

On Wed, Jul 06, 2016 at 06:51:21PM +0200, Matthias Taube wrote:
> Hi,
> 
> if I define a named set in nftables
> >nft 'add set inet filter black2 {type ipv4_addr; flags interval; }'
> >nft add element inet filter black2 { 192.168.1.1/24 }
> 
> it is not possible to add bordering ip-ranges:
> >nft add element inet filter black2 { 192.168.2.1/24 }
> ><cmdline>:1:1-49: Error: Could not process rule: File exists
> >add element inet filter black2 { 192.168.2.1/24 }
> >^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 
> but if I add the ranges in ONE command it works:
> >nft add element inet filter black2 { 192.168.1.1/24, 192.168.2.1/24 }
> 
> then the ranges are put together to one ip-range:
> ># nft list set inet filter black2
> >table inet filter {
> >	set black2 {
> >		type ipv4_addr
> >		flags interval
> >		elements = { 192.168.1.0-192.168.2.255}
> >	}
> >}
> 
> How it is possible to create a set to flexible add and delete bordering
> ip-ranges?

This is fixed in the upcoming 4.7, you can give a try to 4.7-rc6. You
also have to install nft 0.6.

Re: nftables: How to add bordering ip-ranges to a named set

[Matthias Taube]

Am 07.07.2016 um 20:33 schrieb Pablo Neira Ayuso:

> This is fixed in the upcoming 4.7, you can give a try to 4.7-rc6. You
> also have to install nft 0.6.

Thanks for the info. I will wait until this version is in debian sid.