static int xfrm_tunnel_rcv(struct sk_buff *skb) { return xfrm4_rcv_spi(skb, IPPROTO_IPIP, ip_hdr(skb)->saddr); }
int xfrm4_rcv(struct sk_buff *skb) { return xfrm4_rcv_spi(skb, ip_hdr(skb)->protocol, 0); }