Using libnl to create u32 hashkey

[Thomas Graf]

On Mon, Nov 21, 2011 at 11:18:09PM +0200, Adrian Ban wrote:
> Hi,
> 
> I'm using libnl3 to a little project. My problem is that I didn't
> find any documentation about u32 hashkey filters.
> I want to build something like this:
> 
> $TC filter add dev $DEVin  parent 0x01:0x0000 prio 1 protocol ip u32
> $TC filter add dev $DEVin  parent 0x01:0x0000 prio 1 protocol ip
> handle 1: u32 divisor 256
> 
> $TC filter add dev $DEVin parent 0x01:0x0000 prio 2 protocol ip u32 \
>       match ip dst 0.0.0.0/0 \
>       hashkey mask 0xff000000 at 16 \
>       link 1:
> $TC filter add dev $DEVin parent 0x01:0x0000 prio 1 protocol ip
> handle 2: u32 divisor 256
> $TC filter add dev $DEVin parent 0x01:0x0000 prio 1 protocol ip u32
> ht 1:a: \
>       match ip dst 10.0.0.0/8 \
>       hashkey mask 0x00FF0000 at 16 \
>       link 2:
> $TC filter add dev $DEVin parent 0x01:0x0000 prio 1 protocol ip
> handle 3: u32 divisor 256
> $TC filter add dev $DEVin parent 0x01:0x0000 prio 1 protocol ip u32
> ht 1:2e: \
>       match ip dst 46.0.0.0/8 \
>       hashkey mask 0x00FF0000 at 16 \
>       link 3:
> 
> There is any solution to make such things with libnl?

This is not yet fully implemented. For example there is no function that
would allow setting the divisor yet.