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