xfrm_skb_cb
#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
struct xfrm_skb_cb xfrm;
struct xfrm_skb_cb xfrm;
struct xfrm_skb_cb xfrm;
struct xfrm_skb_cb xfrm;
struct xfrm_skb_cb xfrm;