Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * xfrm4_state.c | |
3 | * | |
4 | * Changes: | |
5 | * YOSHIFUJI Hideaki @USAGI | |
6 | * Split up af-specific portion | |
7 | * | |
8 | */ | |
9 | ||
dd87147e | 10 | #include <net/ip.h> |
1da177e4 LT |
11 | #include <net/xfrm.h> |
12 | #include <linux/pfkeyv2.h> | |
13 | #include <linux/ipsec.h> | |
862b82c6 | 14 | #include <linux/netfilter_ipv4.h> |
1da177e4 | 15 | |
dd87147e HX |
16 | static int xfrm4_init_flags(struct xfrm_state *x) |
17 | { | |
18 | if (ipv4_config.no_pmtu_disc) | |
19 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
20 | return 0; | |
21 | } | |
22 | ||
1da177e4 | 23 | static void |
8444cf71 TE |
24 | __xfrm4_init_tempsel(struct xfrm_selector *sel, struct flowi *fl) |
25 | { | |
26 | sel->daddr.a4 = fl->fl4_dst; | |
27 | sel->saddr.a4 = fl->fl4_src; | |
28 | sel->dport = xfrm_flowi_dport(fl); | |
29 | sel->dport_mask = htons(0xffff); | |
30 | sel->sport = xfrm_flowi_sport(fl); | |
31 | sel->sport_mask = htons(0xffff); | |
32 | sel->family = AF_INET; | |
33 | sel->prefixlen_d = 32; | |
34 | sel->prefixlen_s = 32; | |
35 | sel->proto = fl->proto; | |
36 | sel->ifindex = fl->oif; | |
37 | } | |
38 | ||
39 | static void | |
40 | xfrm4_init_temprop(struct xfrm_state *x, struct xfrm_tmpl *tmpl, | |
41 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
1da177e4 | 42 | { |
1da177e4 LT |
43 | x->id = tmpl->id; |
44 | if (x->id.daddr.a4 == 0) | |
45 | x->id.daddr.a4 = daddr->a4; | |
46 | x->props.saddr = tmpl->saddr; | |
47 | if (x->props.saddr.a4 == 0) | |
48 | x->props.saddr.a4 = saddr->a4; | |
49 | x->props.mode = tmpl->mode; | |
50 | x->props.reqid = tmpl->reqid; | |
51 | x->props.family = AF_INET; | |
52 | } | |
53 | ||
36cf9acf HX |
54 | int xfrm4_extract_header(struct sk_buff *skb) |
55 | { | |
56 | struct iphdr *iph = ip_hdr(skb); | |
57 | ||
732c8bd5 | 58 | XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph); |
36cf9acf HX |
59 | XFRM_MODE_SKB_CB(skb)->id = iph->id; |
60 | XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off; | |
61 | XFRM_MODE_SKB_CB(skb)->tos = iph->tos; | |
62 | XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl; | |
732c8bd5 | 63 | XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph); |
36cf9acf HX |
64 | memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0, |
65 | sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl)); | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
1da177e4 LT |
70 | static struct xfrm_state_afinfo xfrm4_state_afinfo = { |
71 | .family = AF_INET, | |
36cf9acf | 72 | .proto = IPPROTO_IPIP, |
227620e2 | 73 | .eth_proto = htons(ETH_P_IP), |
17c2a42a | 74 | .owner = THIS_MODULE, |
dd87147e | 75 | .init_flags = xfrm4_init_flags, |
1da177e4 | 76 | .init_tempsel = __xfrm4_init_tempsel, |
8444cf71 | 77 | .init_temprop = xfrm4_init_temprop, |
cdca7265 | 78 | .output = xfrm4_output, |
227620e2 | 79 | .extract_input = xfrm4_extract_input, |
36cf9acf | 80 | .extract_output = xfrm4_extract_output, |
716062fd | 81 | .transport_finish = xfrm4_transport_finish, |
1da177e4 LT |
82 | }; |
83 | ||
84 | void __init xfrm4_state_init(void) | |
85 | { | |
86 | xfrm_state_register_afinfo(&xfrm4_state_afinfo); | |
87 | } | |
88 | ||
0742fd53 | 89 | #if 0 |
1da177e4 LT |
90 | void __exit xfrm4_state_fini(void) |
91 | { | |
92 | xfrm_state_unregister_afinfo(&xfrm4_state_afinfo); | |
93 | } | |
0742fd53 | 94 | #endif /* 0 */ |
1da177e4 | 95 |