ipv4: Rework ipmr_rt_fib_lookup() flow key initialization.
Use information from the skb as much as possible, currently
this means daddr, saddr, and TOS.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index c81b9b6..3ad38a4 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1788,12 +1788,14 @@
return 0;
}
-static struct mr_table *ipmr_rt_fib_lookup(struct net *net, struct rtable *rt)
+static struct mr_table *ipmr_rt_fib_lookup(struct net *net, struct sk_buff *skb)
{
+ struct rtable *rt = skb_rtable(skb);
+ struct iphdr *iph = ip_hdr(skb);
struct flowi4 fl4 = {
- .daddr = rt->rt_key_dst,
- .saddr = rt->rt_key_src,
- .flowi4_tos = rt->rt_tos,
+ .daddr = iph->daddr,
+ .saddr = iph->saddr,
+ .flowi4_tos = iph->tos,
.flowi4_oif = rt->rt_oif,
.flowi4_iif = rt->rt_iif,
.flowi4_mark = rt->rt_mark,
@@ -1825,7 +1827,7 @@
if (IPCB(skb)->flags & IPSKB_FORWARDED)
goto dont_forward;
- mrt = ipmr_rt_fib_lookup(net, skb_rtable(skb));
+ mrt = ipmr_rt_fib_lookup(net, skb);
if (IS_ERR(mrt)) {
kfree_skb(skb);
return PTR_ERR(mrt);
@@ -1957,7 +1959,7 @@
pim = igmp_hdr(skb);
- mrt = ipmr_rt_fib_lookup(net, skb_rtable(skb));
+ mrt = ipmr_rt_fib_lookup(net, skb);
if (IS_ERR(mrt))
goto drop;
if (!mrt->mroute_do_pim ||
@@ -1989,7 +1991,7 @@
csum_fold(skb_checksum(skb, 0, skb->len, 0))))
goto drop;
- mrt = ipmr_rt_fib_lookup(net, skb_rtable(skb));
+ mrt = ipmr_rt_fib_lookup(net, skb);
if (IS_ERR(mrt))
goto drop;
if (__pim_rcv(mrt, skb, sizeof(*pim))) {