blob: efc5e6b2e87bea7a1776bb97d539a34a1286e47f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/ipv6.h>
#include <net/dsfield.h>
#include <net/xfrm.h>
#ifndef XFRM_INOUT_H
#define XFRM_INOUT_H 1
static inline void xfrm4_extract_header(struct sk_buff *skb)
{
const struct iphdr *iph = ip_hdr(skb);
XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
XFRM_MODE_SKB_CB(skb)->id = iph->id;
XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
}
static inline void xfrm6_extract_header(struct sk_buff *skb)
{
#if IS_ENABLED(CONFIG_IPV6)
struct ipv6hdr *iph = ipv6_hdr(skb);
XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
XFRM_MODE_SKB_CB(skb)->id = 0;
XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
XFRM_MODE_SKB_CB(skb)->optlen = 0;
memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
#else
WARN_ON_ONCE(1);
#endif
}
static inline void xfrm6_beet_make_header(struct sk_buff *skb)
{
struct ipv6hdr *iph = ipv6_hdr(skb);
iph->version = 6;
memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
sizeof(iph->flow_lbl));
iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol;
ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos);
iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl;
}
static inline void xfrm4_beet_make_header(struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
iph->ihl = 5;
iph->version = 4;
iph->protocol = XFRM_MODE_SKB_CB(skb)->protocol;
iph->tos = XFRM_MODE_SKB_CB(skb)->tos;
iph->id = XFRM_MODE_SKB_CB(skb)->id;
iph->frag_off = XFRM_MODE_SKB_CB(skb)->frag_off;
iph->ttl = XFRM_MODE_SKB_CB(skb)->ttl;
}
#endif
|
