#define TCP_SKB_CB(__skb) ((struct tcp_skb_cb *)&((__skb)->cb[0]))
+#if IS_ENABLED(CONFIG_IPV6)
/* This is the variant of inet6_iif() that must be used by TCP,
* as TCP moves IP6CB into a different location in skb->cb[]
*/
{
return TCP_SKB_CB(skb)->header.h6.iif;
}
+#endif
/* Due to TSO, an SKB can be composed of multiple actual
* packets. To keep these tracked properly, we use this.