1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * xfrm6_state.c: based on xfrm4_state.c
4 *
5 * Authors:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
10 * YOSHIFUJI Hideaki @USAGI
11 * Split up af-specific portion
12 *
13 */
14
15 #include <net/xfrm.h>
16 #include <linux/pfkeyv2.h>
17 #include <linux/ipsec.h>
18 #include <linux/netfilter_ipv6.h>
19 #include <linux/export.h>
20 #include <net/dsfield.h>
21 #include <net/ipv6.h>
22 #include <net/addrconf.h>
23
xfrm6_extract_header(struct sk_buff * skb)24 int xfrm6_extract_header(struct sk_buff *skb)
25 {
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
37 return 0;
38 }
39
40 static struct xfrm_state_afinfo xfrm6_state_afinfo = {
41 .family = AF_INET6,
42 .proto = IPPROTO_IPV6,
43 .output = xfrm6_output,
44 .output_finish = xfrm6_output_finish,
45 .extract_input = xfrm6_extract_input,
46 .extract_output = xfrm6_extract_output,
47 .transport_finish = xfrm6_transport_finish,
48 .local_error = xfrm6_local_error,
49 };
50
xfrm6_state_init(void)51 int __init xfrm6_state_init(void)
52 {
53 return xfrm_state_register_afinfo(&xfrm6_state_afinfo);
54 }
55
xfrm6_state_fini(void)56 void xfrm6_state_fini(void)
57 {
58 xfrm_state_unregister_afinfo(&xfrm6_state_afinfo);
59 }
60