inet: Add udplib_lookup_skb() helpers
To be able to use the cached socket reference in the skb during input
processing we add a new set of lookup functions that receive the skb on
their argument list.
Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index a6aecf7..ce26c41 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -107,6 +107,17 @@
return result;
}
+static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
+ __be16 sport, __be16 dport,
+ struct hlist_head udptable[])
+{
+ struct ipv6hdr *iph = ipv6_hdr(skb);
+
+ return __udp6_lib_lookup(dev_net(skb->dst->dev), &iph->saddr, sport,
+ &iph->daddr, dport, inet6_iif(skb),
+ udptable);
+}
+
/*
* This should be easy, if there is something there we
* return it, otherwise we block.
@@ -488,8 +499,7 @@
* check socket cache ... must talk to Alan about his plans
* for sock caches... i'll skip this for now.
*/
- sk = __udp6_lib_lookup(net, saddr, uh->source,
- daddr, uh->dest, inet6_iif(skb), udptable);
+ sk = __udp6_lib_lookup_skb(skb, uh->source, uh->dest, udptable);
if (sk == NULL) {
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
