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netfilter: don't attach a nat extension by default

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nowadays the NAT extension only stores the interface index
(used to purge connections that got masqueraded when interface goes down)
and pptp nat information.

Previous patches moved nf_ct_nat_ext_add to those places that need it.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal
2017-04-20 10:11:35 +02:00
committed by Pablo Neira Ayuso
parent 2fe7c321ab
commit 9a08ecfe74
4 changed files with 3 additions and 13 deletions
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2
include/net/netfilter/nf_nat.h
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@@ -67,7 +67,7 @@ static inline bool nf_nat_oif_changed(unsigned int hooknum,
{
#if IS_ENABLED(CONFIG_NF_NAT_MASQUERADE_IPV4) || \
IS_ENABLED(CONFIG_NF_NAT_MASQUERADE_IPV6)
return nat->masq_index && hooknum == NF_INET_POST_ROUTING &&
return nat && nat->masq_index && hooknum == NF_INET_POST_ROUTING &&
CTINFO2DIR(ctinfo) == IP_CT_DIR_ORIGINAL &&
nat->masq_index != out->ifindex;
#else