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netfilter: nf_nat: place conntrack in source hash after SNAT is done 

If SNAT isn't done, the wrong info maybe got by the other cts.

As the filter table is after DNAT table, the packets dropped in filter
table also bother bysource hash table.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Changli Gao 2011-01-20 15:49:52 +01:00 committed by Patrick McHardy
parent 4cda47d2e7
commit 41a7cab6d3
1 changed files with 11 additions and 7 deletions
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18
net/ipv4/netfilter/nf_nat_core.c
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@ -221,7 +221,14 @@ get_unique_tuple(struct nf_conntrack_tuple *tuple,
manips not an issue. */
if (maniptype == IP_NAT_MANIP_SRC &&
!(range->flags & IP_NAT_RANGE_PROTO_RANDOM)) {
if (find_appropriate_src(net, zone, orig_tuple, tuple, range)) {
/* try the original tuple first */
if (in_range(orig_tuple, range)) {
if (!nf_nat_used_tuple(orig_tuple, ct)) {
*tuple = *orig_tuple;
return;
}
} else if (find_appropriate_src(net, zone, orig_tuple, tuple,
range)) {
pr_debug("get_unique_tuple: Found current src map\n");
if (!nf_nat_used_tuple(tuple, ct))
return;
@ -266,7 +273,6 @@ nf_nat_setup_info(struct nf_conn *ct,
struct net *net = nf_ct_net(ct);
struct nf_conntrack_tuple curr_tuple, new_tuple;
struct nf_conn_nat *nat;
int have_to_hash = !(ct->status & IPS_NAT_DONE_MASK);
/* nat helper or nfctnetlink also setup binding */
nat = nfct_nat(ct);
@ -306,8 +312,7 @@ nf_nat_setup_info(struct nf_conn *ct,
ct->status |= IPS_DST_NAT;
}
/* Place in source hash if this is the first time. */
if (have_to_hash) {
if (maniptype == IP_NAT_MANIP_SRC) {
unsigned int srchash;
srchash = hash_by_src(net, nf_ct_zone(ct),
@ -535,7 +540,7 @@ static void nf_nat_cleanup_conntrack(struct nf_conn *ct)
if (nat == NULL || nat->ct == NULL)
return;
NF_CT_ASSERT(nat->ct->status & IPS_NAT_DONE_MASK);
NF_CT_ASSERT(nat->ct->status & IPS_SRC_NAT_DONE);
spin_lock_bh(&nf_nat_lock);
hlist_del_rcu(&nat->bysource);
@ -548,11 +553,10 @@ static void nf_nat_move_storage(void *new, void *old)
struct nf_conn_nat *old_nat = old;
struct nf_conn *ct = old_nat->ct;
if (!ct || !(ct->status & IPS_NAT_DONE_MASK))
if (!ct || !(ct->status & IPS_SRC_NAT_DONE))
return;
spin_lock_bh(&nf_nat_lock);
new_nat->ct = ct;
hlist_replace_rcu(&old_nat->bysource, &new_nat->bysource);
spin_unlock_bh(&nf_nat_lock);
}