[IPV4]: Add 'rtable' field in struct sk_buff to alias 'dst' and avoid casts

(Anonymous) unions can help us to avoid ugly casts.

A common cast it the (struct rtable *)skb->dst one.

Defining an union like  :
union {
     struct dst_entry *dst;
     struct rtable *rtable;
};
permits to use skb->rtable in place.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index d3f34a772f3b..6a4ee8da6994 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -948,7 +948,7 @@ int igmp_rcv(struct sk_buff *skb)
         case IGMPV2_HOST_MEMBERSHIP_REPORT:
         case IGMPV3_HOST_MEMBERSHIP_REPORT:
                 /* Is it our report looped back? */
-                if (((struct rtable*)skb->dst)->fl.iif == 0)
+                if (skb->rtable->fl.iif == 0)
                         break;
                 /* don't rely on MC router hearing unicast reports */
                 if (skb->pkt_type == PACKET_MULTICAST ||