1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */
21da177e4SLinus Torvalds #ifndef _NET_ESP_H
31da177e4SLinus Torvalds #define _NET_ESP_H
41da177e4SLinus Torvalds
538320c70SHerbert Xu #include <linux/skbuff.h>
61da177e4SLinus Torvalds
787bdc48dSHerbert Xu struct ip_esp_hdr;
8*949d6b40SJakub Kicinski struct xfrm_state;
987bdc48dSHerbert Xu
ip_esp_hdr(const struct sk_buff * skb)1087bdc48dSHerbert Xu static inline struct ip_esp_hdr *ip_esp_hdr(const struct sk_buff *skb)
1187bdc48dSHerbert Xu {
1287bdc48dSHerbert Xu return (struct ip_esp_hdr *)skb_transport_header(skb);
1387bdc48dSHerbert Xu }
1487bdc48dSHerbert Xu
esp_output_fill_trailer(u8 * tail,int tfclen,int plen,__u8 proto)15dda520c4SRaed Salem static inline void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto)
16dda520c4SRaed Salem {
17dda520c4SRaed Salem /* Fill padding... */
18dda520c4SRaed Salem if (tfclen) {
19dda520c4SRaed Salem memset(tail, 0, tfclen);
20dda520c4SRaed Salem tail += tfclen;
21dda520c4SRaed Salem }
22dda520c4SRaed Salem do {
23dda520c4SRaed Salem int i;
24dda520c4SRaed Salem for (i = 0; i < plen - 2; i++)
25dda520c4SRaed Salem tail[i] = i + 1;
26dda520c4SRaed Salem } while (0);
27dda520c4SRaed Salem tail[plen - 2] = plen - 2;
28dda520c4SRaed Salem tail[plen - 1] = proto;
29dda520c4SRaed Salem }
30dda520c4SRaed Salem
31fca11ebdSSteffen Klassert struct esp_info {
32fca11ebdSSteffen Klassert struct ip_esp_hdr *esph;
33fca11ebdSSteffen Klassert __be64 seqno;
34fca11ebdSSteffen Klassert int tfclen;
35fca11ebdSSteffen Klassert int tailen;
36fca11ebdSSteffen Klassert int plen;
37fca11ebdSSteffen Klassert int clen;
38fca11ebdSSteffen Klassert int len;
39fca11ebdSSteffen Klassert int nfrags;
40fca11ebdSSteffen Klassert __u8 proto;
41fca11ebdSSteffen Klassert bool inplace;
42fca11ebdSSteffen Klassert };
43fca11ebdSSteffen Klassert
44fca11ebdSSteffen Klassert int esp_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
45fca11ebdSSteffen Klassert int esp_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
46fca11ebdSSteffen Klassert int esp_input_done2(struct sk_buff *skb, int err);
47383d0350SSteffen Klassert int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
48383d0350SSteffen Klassert int esp6_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp);
49383d0350SSteffen Klassert int esp6_input_done2(struct sk_buff *skb, int err);
501da177e4SLinus Torvalds #endif
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