1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/skbuff.h>
7 #define ESP_SKB_FRAG_MAXSIZE (PAGE_SIZE << SKB_FRAG_PAGE_ORDER)
11 static inline struct ip_esp_hdr *ip_esp_hdr(const struct sk_buff *skb)
13 return (struct ip_esp_hdr *)skb_transport_header(skb);
16 static inline void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto)
20 memset(tail, 0, tfclen);
25 for (i = 0; i < plen - 2; i++)
28 tail[plen - 2] = plen - 2;
29 tail[plen - 1] = proto;
33 struct ip_esp_hdr *esph;
45 int esp_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
46 int esp_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
47 int esp_input_done2(struct sk_buff *skb, int err);
48 int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
49 int esp6_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
50 int esp6_input_done2(struct sk_buff *skb, int err);