Re: [RFC] nftables: reverse path filtering for nft

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Florian Westphal <fw@xxxxxxxxx> wrote:
> Yet another option:
> 
> FIB     fib_type     fib_family   fib_key_flags	fib_addr
> 
> Which is not ambiguous anymore as either saddr or daddr will terminate
> the statement.  We'd have to remove the saddr option but I don't think its a
> problem (the iptables rpfilter modules set flowi.saddr if packet daddr
> is unicast address).
> 
> Would give following syntax :
> 
> fib oif mark saddr
> fib oif saddr
> fib oif mark,oif daddr

But also
fib oif oif saddr

Yuck.
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