1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NET_IPCOMP_H
3 #define _NET_IPCOMP_H
4 
5 #include <linux/types.h>
6 
7 #define IPCOMP_SCRATCH_SIZE     65400
8 
9 struct crypto_comp;
10 
11 struct ipcomp_data {
12 	u16 threshold;
13 	struct crypto_comp * __percpu *tfms;
14 };
15 
16 struct ip_comp_hdr;
17 struct sk_buff;
18 struct xfrm_state;
19 
20 int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb);
21 int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb);
22 void ipcomp_destroy(struct xfrm_state *x);
23 int ipcomp_init_state(struct xfrm_state *x);
24 
ip_comp_hdr(const struct sk_buff * skb)25 static inline struct ip_comp_hdr *ip_comp_hdr(const struct sk_buff *skb)
26 {
27 	return (struct ip_comp_hdr *)skb_transport_header(skb);
28 }
29 
30 #endif
31