netfilter: xt_NFQUEUE: coalesce IPv4 and IPv6 hashing
Because rev1 and rev3 of the target share the same hashing
generalize it by introduing nfqueue_hash().
Signed-off-by: Holger Eitzenberger <holger@eitzenberger.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/net/netfilter/xt_NFQUEUE.c b/net/netfilter/xt_NFQUEUE.c
index a287ef2..1e2fae3 100644
--- a/net/netfilter/xt_NFQUEUE.c
+++ b/net/netfilter/xt_NFQUEUE.c
@@ -76,22 +76,31 @@
}
#endif
+static u32
+nfqueue_hash(const struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct xt_NFQ_info_v1 *info = par->targinfo;
+ u32 queue = info->queuenum;
+
+ if (par->family == NFPROTO_IPV4)
+ queue += ((u64) hash_v4(skb) * info->queues_total) >> 32;
+#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
+ else if (par->family == NFPROTO_IPV6)
+ queue += ((u64) hash_v6(skb) * info->queues_total) >> 32;
+#endif
+
+ return queue;
+}
+
static unsigned int
nfqueue_tg_v1(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct xt_NFQ_info_v1 *info = par->targinfo;
u32 queue = info->queuenum;
- if (info->queues_total > 1) {
- if (par->family == NFPROTO_IPV4)
- queue = (((u64) hash_v4(skb) * info->queues_total) >>
- 32) + queue;
-#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
- else if (par->family == NFPROTO_IPV6)
- queue = (((u64) hash_v6(skb) * info->queues_total) >>
- 32) + queue;
-#endif
- }
+ if (info->queues_total > 1)
+ queue = nfqueue_hash(skb, par);
+
return NF_QUEUE_NR(queue);
}
@@ -144,17 +153,10 @@
int cpu = smp_processor_id();
queue = info->queuenum + cpu % info->queues_total;
- } else {
- if (par->family == NFPROTO_IPV4)
- queue = (((u64) hash_v4(skb) * info->queues_total) >>
- 32) + queue;
-#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES)
- else if (par->family == NFPROTO_IPV6)
- queue = (((u64) hash_v6(skb) * info->queues_total) >>
- 32) + queue;
-#endif
- }
+ } else
+ queue = nfqueue_hash(skb, par);
}
+
return NF_QUEUE_NR(queue);
}