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skb_sec_path gains 'const' qualifier to avoid
xt_policy.c: 'skb_sec_path' discards 'const' qualifier from pointer target type
same reasoning as previous conversions: Won't need to touch these
spots anymore when skb->sp is removed.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Eyal says:
doesn't the use of nft_pf(pkt) in this context limit the matching of
encapsulated packets to the same family?
IIUC when an e.g. IPv6-in-IPv4 packet is matched, the nft_pf(pkt) will
be the decapsulated packet family - IPv6 - whereas the state may be
IPv4. So this check would not allow matching the 'underlay' address in
such cases.
I know this was a limitation in xt_policy. but is this intentional in
this matcher? or is it possible to use state->props.family when
validating the match instead of nft_pf(pkt)?
Userspace already tells us which address family it expects to match, so
we can just use the real state family rather than the hook family.
so change it as suggested above.
Reported-by: Eyal Birger <eyal.birger@gmail.com>
Suggested-by: Eyal Birger <eyal.birger@gmail.com>
Fixes: 6c47260250fc6 ("netfilter: nf_tables: add xfrm expression")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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supports fetching saddr/daddr of tunnel mode states, request id and spi.
If direction is 'in', use inbound skb secpath, else dst->xfrm.
Joint work with Máté Eckl.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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