gtp: Set TOS and routing scope independently for fib lookups.

There's no reason for setting the RTO_ONLINK flag in ->flowi4_tos as
RT_CONN_FLAGS() does. We can easily set ->flowi4_scope properly
instead. This makes the code more explicit and will allow to convert
->flowi4_tos to dscp_t in the future.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/gtp.c

@@ -243,7 +243,8 @@ static struct rtable *ip4_route_output_gtp(struct flowi4 *fl4,
 	fl4->flowi4_oif		= sk->sk_bound_dev_if;
 	fl4->daddr		= daddr;
 	fl4->saddr		= saddr;
-	fl4->flowi4_tos		= RT_CONN_FLAGS(sk);
+	fl4->flowi4_tos		= ip_sock_rt_tos(sk);
+	fl4->flowi4_scope	= ip_sock_rt_scope(sk);
 	fl4->flowi4_proto	= sk->sk_protocol;
 
 	return ip_route_output_key(sock_net(sk), fl4);