1/* SPDX-License-Identifier: GPL-2.0 */
 2#include <linux/ipv6.h>
 3#include <net/dsfield.h>
 4#include <net/xfrm.h>
 5
 6#ifndef XFRM_INOUT_H
 7#define XFRM_INOUT_H 1
 8
 9static inline void xfrm4_extract_header(struct sk_buff *skb)
10{
11	const struct iphdr *iph = ip_hdr(skb);
12
13	XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
14	XFRM_MODE_SKB_CB(skb)->id = iph->id;
15	XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
16	XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
17	XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
18	XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
19	memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
20	       sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
21}
22
23static inline void xfrm6_extract_header(struct sk_buff *skb)
24{
25#if IS_ENABLED(CONFIG_IPV6)
26	struct ipv6hdr *iph = ipv6_hdr(skb);
27
28	XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
29	XFRM_MODE_SKB_CB(skb)->id = 0;
30	XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
31	XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
32	XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
33	XFRM_MODE_SKB_CB(skb)->optlen = 0;
34	memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
35	       sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
36#else
37	WARN_ON_ONCE(1);
38#endif
39}
40
41static inline void xfrm6_beet_make_header(struct sk_buff *skb)
42{
43	struct ipv6hdr *iph = ipv6_hdr(skb);
44
45	iph->version = 6;
46
47	memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
48	       sizeof(iph->flow_lbl));
49	iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol;
50
51	ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos);
52	iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl;
53}
54
55static inline void xfrm4_beet_make_header(struct sk_buff *skb)
56{
57	struct iphdr *iph = ip_hdr(skb);
58
59	iph->ihl = 5;
60	iph->version = 4;
61
62	iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol;
63	iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
64
65	iph->id = XFRM_MODE_SKB_CB(skb)->id;
66	iph->frag_off = XFRM_MODE_SKB_CB(skb)->frag_off;
67	iph->ttl = XFRM_MODE_SKB_CB(skb)->ttl;
68}
69
70#endif

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#include <linux/ipv6.h>
 3#include <net/dsfield.h>
 4#include <net/xfrm.h>
 5
 6#ifndef XFRM_INOUT_H
 7#define XFRM_INOUT_H 1
 8
 9static inline void xfrm4_extract_header(struct sk_buff *skb)
10{
11	const struct iphdr *iph = ip_hdr(skb);
12
13	XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
14	XFRM_MODE_SKB_CB(skb)->id = iph->id;
15	XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
16	XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
17	XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
18	XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
19	memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
20	       sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
21}
22
23static inline void xfrm6_extract_header(struct sk_buff *skb)
24{
25#if IS_ENABLED(CONFIG_IPV6)
26	struct ipv6hdr *iph = ipv6_hdr(skb);
27
28	XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
29	XFRM_MODE_SKB_CB(skb)->id = 0;
30	XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
31	XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
32	XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
33	XFRM_MODE_SKB_CB(skb)->optlen = 0;
34	memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
35	       sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
36#else
37	WARN_ON_ONCE(1);
38#endif
39}
40
41static inline void xfrm6_beet_make_header(struct sk_buff *skb)
42{
43	struct ipv6hdr *iph = ipv6_hdr(skb);
44
45	iph->version = 6;
46
47	memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
48	       sizeof(iph->flow_lbl));
49	iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol;
50
51	ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos);
52	iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl;
53}
54
55static inline void xfrm4_beet_make_header(struct sk_buff *skb)
56{
57	struct iphdr *iph = ip_hdr(skb);
58
59	iph->ihl = 5;
60	iph->version = 4;
61
62	iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol;
63	iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
64
65	iph->id = XFRM_MODE_SKB_CB(skb)->id;
66	iph->frag_off = XFRM_MODE_SKB_CB(skb)->frag_off;
67	iph->ttl = XFRM_MODE_SKB_CB(skb)->ttl;
68}
69
70#endif