1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _NET_IPCOMP_H 3 #define _NET_IPCOMP_H 4 5 #include <linux/skbuff.h> 6 7 struct ip_comp_hdr; 8 struct netlink_ext_ack; 9 struct xfrm_state; 10 11 int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb); 12 int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb); 13 void ipcomp_destroy(struct xfrm_state *x); 14 int ipcomp_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack); 15 16 static inline struct ip_comp_hdr *ip_comp_hdr(const struct sk_buff *skb) 17 { 18 return (struct ip_comp_hdr *)skb_transport_header(skb); 19 } 20 21 #endif 22