1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NET_ESP_H
3 #define _NET_ESP_H
4 
5 #include <linux/skbuff.h>
6 
7 struct ip_esp_hdr;
8 
ip_esp_hdr(const struct sk_buff * skb)9 static inline struct ip_esp_hdr *ip_esp_hdr(const struct sk_buff *skb)
10 {
11 	return (struct ip_esp_hdr *)skb_transport_header(skb);
12 }
13 
14 struct esp_info {
15 	struct	ip_esp_hdr *esph;
16 	__be64	seqno;
17 	int	tfclen;
18 	int	tailen;
19 	int	plen;
20 	int	clen;
21 	int 	len;
22 	int 	nfrags;
23 	__u8	proto;
24 	bool	inplace;
25 };
26 
27 int esp_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
28 int esp_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
29 int esp_input_done2(struct sk_buff *skb, int err);
30 int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
31 int esp6_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
32 int esp6_input_done2(struct sk_buff *skb, int err);
33 #endif
34