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Re: [RFC] mac80211: add extap functionality

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On 19 April 2016 at 13:02, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote:
>> > How much of that could be done with nftables btw?
>
>> I'm not sure if I follow. Do you mean what I've been able to do with
>> relayd until now? Without link-local ipv6 routing DHCPv6 is broken
>> (could probably addressed with DHCPv6 Relay to a certain degree) and
>> RS/RA may not work (if it propagates fe80:: routes). Also apps that
>> rely on fe80:: socket binding/addressing will fail.
>
> Ok, so that makes sense I guess - but you were speaking of some packet
> mangling etc. and I was wondering if the nftables virtual machine could
> actually do something like that.

By mangling I meant packet payload needs to be modified in various
ways (typically just ether_dest/src, but ARP/NS/NA/DHCP needs extra
care). I don't think you can force a link-local packet to switch
interfaces through nftables anyway (or can you?). Even if you could I
guess you could argue it's a bug?


Michał
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