netfilter: nft_meta: add support for slave device ifindex matching

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Allow to match on vrf slave ifindex or name.

In case there was no slave interface involved, store 0 in the
destination register just like existing iif/oif matching.

sdif(name) is restricted to the ipv4/ipv6 input and forward hooks,
as it depends on ip(6) stack parsing/storing info in skb->cb[].

Cc: Martin Willi <martin@strongswan.org>
Cc: David Ahern <dsahern@kernel.org>
Cc: Shrijeet Mukherjee <shrijeet@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

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Florian Westphal 2019-12-18 12:05:21 +01:00 • committed by Pablo Neira Ayuso

parent 01a0fc8225

commit c14ceb0ec7

2 changed files with 73 additions and 7 deletions

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include/uapi/linux/netfilter/nf_tables.h

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