diff options
| author | Andrew Collins <bsderandrew@gmail.com> | 2012-12-12 14:23:49 +0000 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-12-16 23:28:30 +0100 |
| commit | c65ef8dc7b1c16379b9fc29e925716a10804af43 (patch) | |
| tree | 52c8c66e995ea0c8e115a137163be2090561dd3c /net | |
| parent | c6f408996c625cb950cad024f90e50519f94713c (diff) | |
| download | linux-c65ef8dc7b1c16379b9fc29e925716a10804af43.tar.gz linux-c65ef8dc7b1c16379b9fc29e925716a10804af43.tar.bz2 linux-c65ef8dc7b1c16379b9fc29e925716a10804af43.zip | |
netfilter: nf_nat: Also handle non-ESTABLISHED routing changes in MASQUERADE
Since (a0ecb85 netfilter: nf_nat: Handle routing changes in MASQUERADE
target), the MASQUERADE target handles routing changes which affect
the output interface of a connection, but only for ESTABLISHED
connections. It is also possible for NEW connections which
already have a conntrack entry to be affected by routing changes.
This adds a check to drop entries in the NEW+conntrack state
when the oif has changed.
Signed-off-by: Andrew Collins <bsderandrew@gmail.com>
Acked-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/netfilter/iptable_nat.c | 15 | ||||
| -rw-r--r-- | net/ipv6/netfilter/ip6table_nat.c | 15 |
2 files changed, 20 insertions, 10 deletions
diff --git a/net/ipv4/netfilter/iptable_nat.c b/net/ipv4/netfilter/iptable_nat.c index da2c8a368f68..eeaff7e4acb5 100644 --- a/net/ipv4/netfilter/iptable_nat.c +++ b/net/ipv4/netfilter/iptable_nat.c @@ -124,23 +124,28 @@ nf_nat_ipv4_fn(unsigned int hooknum, ret = nf_nat_rule_find(skb, hooknum, in, out, ct); if (ret != NF_ACCEPT) return ret; - } else + } else { pr_debug("Already setup manip %s for ct %p\n", maniptype == NF_NAT_MANIP_SRC ? "SRC" : "DST", ct); + if (nf_nat_oif_changed(hooknum, ctinfo, nat, out)) + goto oif_changed; + } break; default: /* ESTABLISHED */ NF_CT_ASSERT(ctinfo == IP_CT_ESTABLISHED || ctinfo == IP_CT_ESTABLISHED_REPLY); - if (nf_nat_oif_changed(hooknum, ctinfo, nat, out)) { - nf_ct_kill_acct(ct, ctinfo, skb); - return NF_DROP; - } + if (nf_nat_oif_changed(hooknum, ctinfo, nat, out)) + goto oif_changed; } return nf_nat_packet(ct, ctinfo, hooknum, skb); + +oif_changed: + nf_ct_kill_acct(ct, ctinfo, skb); + return NF_DROP; } static unsigned int diff --git a/net/ipv6/netfilter/ip6table_nat.c b/net/ipv6/netfilter/ip6table_nat.c index 6c8ae24b85eb..e0e788d25b14 100644 --- a/net/ipv6/netfilter/ip6table_nat.c +++ b/net/ipv6/netfilter/ip6table_nat.c @@ -127,23 +127,28 @@ nf_nat_ipv6_fn(unsigned int hooknum, ret = nf_nat_rule_find(skb, hooknum, in, out, ct); if (ret != NF_ACCEPT) return ret; - } else + } else { pr_debug("Already setup manip %s for ct %p\n", maniptype == NF_NAT_MANIP_SRC ? "SRC" : "DST", ct); + if (nf_nat_oif_changed(hooknum, ctinfo, nat, out)) + goto oif_changed; + } break; default: /* ESTABLISHED */ NF_CT_ASSERT(ctinfo == IP_CT_ESTABLISHED || ctinfo == IP_CT_ESTABLISHED_REPLY); - if (nf_nat_oif_changed(hooknum, ctinfo, nat, out)) { - nf_ct_kill_acct(ct, ctinfo, skb); - return NF_DROP; - } + if (nf_nat_oif_changed(hooknum, ctinfo, nat, out)) + goto oif_changed; } return nf_nat_packet(ct, ctinfo, hooknum, skb); + +oif_changed: + nf_ct_kill_acct(ct, ctinfo, skb); + return NF_DROP; } static unsigned int |