Orange Pi5 kernel

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NET_ESP_H
#define _NET_ESP_H
 
#include <linux/skbuff.h>
 
#define ESP_SKB_FRAG_MAXSIZE (PAGE_SIZE << SKB_FRAG_PAGE_ORDER)
 
struct ip_esp_hdr;
 
static inline struct ip_esp_hdr *ip_esp_hdr(const struct sk_buff *skb)
{
<------>return (struct ip_esp_hdr *)skb_transport_header(skb);
}
 
static inline void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto)
{
<------>/* Fill padding... */
<------>if (tfclen) {
<------><------>memset(tail, 0, tfclen);
<------><------>tail += tfclen;
<------>}
<------>do {
<------><------>int i;
<------><------>for (i = 0; i < plen - 2; i++)
<------><------><------>tail[i] = i + 1;
<------>} while (0);
<------>tail[plen - 2] = plen - 2;
<------>tail[plen - 1] = proto;
}
 
struct esp_info {
<------>struct	ip_esp_hdr *esph;
<------>__be64	seqno;
<------>int	tfclen;
<------>int	tailen;
<------>int	plen;
<------>int	clen;
<------>int 	len;
<------>int 	nfrags;
<------>__u8	proto;
<------>bool	inplace;
};
 
int esp_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
int esp_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
int esp_input_done2(struct sk_buff *skb, int err);
int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
int esp6_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
int esp6_input_done2(struct sk_buff *skb, int err);
#endif