]>
Commit | Line | Data |
---|---|---|
1 | // SPDX-License-Identifier: GPL-2.0 | |
2 | /* | |
3 | * xfrm4_state.c | |
4 | * | |
5 | * Changes: | |
6 | * YOSHIFUJI Hideaki @USAGI | |
7 | * Split up af-specific portion | |
8 | * | |
9 | */ | |
10 | ||
11 | #include <net/ip.h> | |
12 | #include <net/xfrm.h> | |
13 | #include <linux/pfkeyv2.h> | |
14 | #include <linux/ipsec.h> | |
15 | #include <linux/netfilter_ipv4.h> | |
16 | #include <linux/export.h> | |
17 | ||
18 | static int xfrm4_init_flags(struct xfrm_state *x) | |
19 | { | |
20 | if (xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc) | |
21 | x->props.flags |= XFRM_STATE_NOPMTUDISC; | |
22 | return 0; | |
23 | } | |
24 | ||
25 | static void | |
26 | __xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl) | |
27 | { | |
28 | const struct flowi4 *fl4 = &fl->u.ip4; | |
29 | ||
30 | sel->daddr.a4 = fl4->daddr; | |
31 | sel->saddr.a4 = fl4->saddr; | |
32 | sel->dport = xfrm_flowi_dport(fl, &fl4->uli); | |
33 | sel->dport_mask = htons(0xffff); | |
34 | sel->sport = xfrm_flowi_sport(fl, &fl4->uli); | |
35 | sel->sport_mask = htons(0xffff); | |
36 | sel->family = AF_INET; | |
37 | sel->prefixlen_d = 32; | |
38 | sel->prefixlen_s = 32; | |
39 | sel->proto = fl4->flowi4_proto; | |
40 | sel->ifindex = fl4->flowi4_oif; | |
41 | } | |
42 | ||
43 | static void | |
44 | xfrm4_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl, | |
45 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
46 | { | |
47 | x->id = tmpl->id; | |
48 | if (x->id.daddr.a4 == 0) | |
49 | x->id.daddr.a4 = daddr->a4; | |
50 | x->props.saddr = tmpl->saddr; | |
51 | if (x->props.saddr.a4 == 0) | |
52 | x->props.saddr.a4 = saddr->a4; | |
53 | x->props.mode = tmpl->mode; | |
54 | x->props.reqid = tmpl->reqid; | |
55 | x->props.family = AF_INET; | |
56 | } | |
57 | ||
58 | int xfrm4_extract_header(struct sk_buff *skb) | |
59 | { | |
60 | const struct iphdr *iph = ip_hdr(skb); | |
61 | ||
62 | XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph); | |
63 | XFRM_MODE_SKB_CB(skb)->id = iph->id; | |
64 | XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off; | |
65 | XFRM_MODE_SKB_CB(skb)->tos = iph->tos; | |
66 | XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl; | |
67 | XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph); | |
68 | memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0, | |
69 | sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl)); | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
74 | static struct xfrm_state_afinfo xfrm4_state_afinfo = { | |
75 | .family = AF_INET, | |
76 | .proto = IPPROTO_IPIP, | |
77 | .eth_proto = htons(ETH_P_IP), | |
78 | .owner = THIS_MODULE, | |
79 | .init_flags = xfrm4_init_flags, | |
80 | .init_tempsel = __xfrm4_init_tempsel, | |
81 | .init_temprop = xfrm4_init_temprop, | |
82 | .output = xfrm4_output, | |
83 | .output_finish = xfrm4_output_finish, | |
84 | .extract_input = xfrm4_extract_input, | |
85 | .extract_output = xfrm4_extract_output, | |
86 | .transport_finish = xfrm4_transport_finish, | |
87 | .local_error = xfrm4_local_error, | |
88 | }; | |
89 | ||
90 | void __init xfrm4_state_init(void) | |
91 | { | |
92 | xfrm_state_register_afinfo(&xfrm4_state_afinfo); | |
93 | } |