[SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rxrpc/transport.c b/net/rxrpc/transport.c
index 8e57be2..cac078b 100644
--- a/net/rxrpc/transport.c
+++ b/net/rxrpc/transport.c
@@ -478,7 +478,7 @@
 			return;
 		}
 
-		addr = pkt->nh.iph->saddr;
+		addr = ip_hdr(pkt)->saddr;
 		port = pkt->h.uh->source;
 
 		_net("Rx Received UDP packet from %08x:%04hu",
@@ -626,7 +626,7 @@
 	memset(&sin,0,sizeof(sin));
 	sin.sin_family		= AF_INET;
 	sin.sin_port		= msg->pkt->h.uh->source;
-	sin.sin_addr.s_addr	= msg->pkt->nh.iph->saddr;
+	sin.sin_addr.s_addr	= ip_hdr(msg->pkt)->saddr;
 
 	msghdr.msg_name		= &sin;
 	msghdr.msg_namelen	= sizeof(sin);