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 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