/* SPDX-License-Identifier: GPL-2.0 */#ifndef _NET_IPCOMP_H#define _NET_IPCOMP_H #include <linux/skbuff.h> struct ip_comp_hdr;struct netlink_ext_ack;struct xfrm_state; int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb);int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb);void ipcomp_destroy(struct xfrm_state *x);int ipcomp_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack); static inline struct ip_comp_hdr *ip_comp_hdr(const struct sk_buff *skb){	return (struct ip_comp_hdr *)skb_transport_header(skb);} #endif