1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NET_IPCOMP_H
3 #define _NET_IPCOMP_H
4 
5 #include <linux/skbuff.h>
6 #include <linux/types.h>
7 
8 #define IPCOMP_SCRATCH_SIZE     65400
9 
10 struct crypto_comp;
11 struct ip_comp_hdr;
12 
13 struct ipcomp_data {
14 	u16 threshold;
15 	struct crypto_comp * __percpu *tfms;
16 };
17 
18 struct ip_comp_hdr;
19 struct sk_buff;
20 struct xfrm_state;
21 
22 int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb);
23 int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb);
24 void ipcomp_destroy(struct xfrm_state *x);
25 int ipcomp_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack);
26 
ip_comp_hdr(const struct sk_buff * skb)27 static inline struct ip_comp_hdr *ip_comp_hdr(const struct sk_buff *skb)
28 {
29 	return (struct ip_comp_hdr *)skb_transport_header(skb);
30 }
31 
32 #endif
33