Loading...
1/*
2 * xfrm4_state.c
3 *
4 * Changes:
5 * YOSHIFUJI Hideaki @USAGI
6 * Split up af-specific portion
7 *
8 */
9
10#include <net/ip.h>
11#include <net/xfrm.h>
12#include <linux/pfkeyv2.h>
13#include <linux/ipsec.h>
14#include <linux/netfilter_ipv4.h>
15#include <linux/export.h>
16
17static int xfrm4_init_flags(struct xfrm_state *x)
18{
19 if (ipv4_config.no_pmtu_disc)
20 x->props.flags |= XFRM_STATE_NOPMTUDISC;
21 return 0;
22}
23
24static void
25__xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
26{
27 const struct flowi4 *fl4 = &fl->u.ip4;
28
29 sel->daddr.a4 = fl4->daddr;
30 sel->saddr.a4 = fl4->saddr;
31 sel->dport = xfrm_flowi_dport(fl, &fl4->uli);
32 sel->dport_mask = htons(0xffff);
33 sel->sport = xfrm_flowi_sport(fl, &fl4->uli);
34 sel->sport_mask = htons(0xffff);
35 sel->family = AF_INET;
36 sel->prefixlen_d = 32;
37 sel->prefixlen_s = 32;
38 sel->proto = fl4->flowi4_proto;
39 sel->ifindex = fl4->flowi4_oif;
40}
41
42static void
43xfrm4_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl,
44 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
45{
46 x->id = tmpl->id;
47 if (x->id.daddr.a4 == 0)
48 x->id.daddr.a4 = daddr->a4;
49 x->props.saddr = tmpl->saddr;
50 if (x->props.saddr.a4 == 0)
51 x->props.saddr.a4 = saddr->a4;
52 x->props.mode = tmpl->mode;
53 x->props.reqid = tmpl->reqid;
54 x->props.family = AF_INET;
55}
56
57int xfrm4_extract_header(struct sk_buff *skb)
58{
59 const struct iphdr *iph = ip_hdr(skb);
60
61 XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
62 XFRM_MODE_SKB_CB(skb)->id = iph->id;
63 XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
64 XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
65 XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
66 XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
67 memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
68 sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
69
70 return 0;
71}
72
73static struct xfrm_state_afinfo xfrm4_state_afinfo = {
74 .family = AF_INET,
75 .proto = IPPROTO_IPIP,
76 .eth_proto = htons(ETH_P_IP),
77 .owner = THIS_MODULE,
78 .init_flags = xfrm4_init_flags,
79 .init_tempsel = __xfrm4_init_tempsel,
80 .init_temprop = xfrm4_init_temprop,
81 .output = xfrm4_output,
82 .output_finish = xfrm4_output_finish,
83 .extract_input = xfrm4_extract_input,
84 .extract_output = xfrm4_extract_output,
85 .transport_finish = xfrm4_transport_finish,
86};
87
88void __init xfrm4_state_init(void)
89{
90 xfrm_state_register_afinfo(&xfrm4_state_afinfo);
91}
92
93#if 0
94void __exit xfrm4_state_fini(void)
95{
96 xfrm_state_unregister_afinfo(&xfrm4_state_afinfo);
97}
98#endif /* 0 */
99
1/*
2 * xfrm4_state.c
3 *
4 * Changes:
5 * YOSHIFUJI Hideaki @USAGI
6 * Split up af-specific portion
7 *
8 */
9
10#include <net/ip.h>
11#include <net/xfrm.h>
12#include <linux/pfkeyv2.h>
13#include <linux/ipsec.h>
14#include <linux/netfilter_ipv4.h>
15
16static 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
23static void
24__xfrm4_init_tempsel(struct xfrm_selector *sel, const struct flowi *fl)
25{
26 const struct flowi4 *fl4 = &fl->u.ip4;
27
28 sel->daddr.a4 = fl4->daddr;
29 sel->saddr.a4 = fl4->saddr;
30 sel->dport = xfrm_flowi_dport(fl, &fl4->uli);
31 sel->dport_mask = htons(0xffff);
32 sel->sport = xfrm_flowi_sport(fl, &fl4->uli);
33 sel->sport_mask = htons(0xffff);
34 sel->family = AF_INET;
35 sel->prefixlen_d = 32;
36 sel->prefixlen_s = 32;
37 sel->proto = fl4->flowi4_proto;
38 sel->ifindex = fl4->flowi4_oif;
39}
40
41static void
42xfrm4_init_temprop(struct xfrm_state *x, const struct xfrm_tmpl *tmpl,
43 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
44{
45 x->id = tmpl->id;
46 if (x->id.daddr.a4 == 0)
47 x->id.daddr.a4 = daddr->a4;
48 x->props.saddr = tmpl->saddr;
49 if (x->props.saddr.a4 == 0)
50 x->props.saddr.a4 = saddr->a4;
51 x->props.mode = tmpl->mode;
52 x->props.reqid = tmpl->reqid;
53 x->props.family = AF_INET;
54}
55
56int xfrm4_extract_header(struct sk_buff *skb)
57{
58 const struct iphdr *iph = ip_hdr(skb);
59
60 XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
61 XFRM_MODE_SKB_CB(skb)->id = iph->id;
62 XFRM_MODE_SKB_CB(skb)->frag_off = iph->frag_off;
63 XFRM_MODE_SKB_CB(skb)->tos = iph->tos;
64 XFRM_MODE_SKB_CB(skb)->ttl = iph->ttl;
65 XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
66 memset(XFRM_MODE_SKB_CB(skb)->flow_lbl, 0,
67 sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
68
69 return 0;
70}
71
72static struct xfrm_state_afinfo xfrm4_state_afinfo = {
73 .family = AF_INET,
74 .proto = IPPROTO_IPIP,
75 .eth_proto = htons(ETH_P_IP),
76 .owner = THIS_MODULE,
77 .init_flags = xfrm4_init_flags,
78 .init_tempsel = __xfrm4_init_tempsel,
79 .init_temprop = xfrm4_init_temprop,
80 .output = xfrm4_output,
81 .output_finish = xfrm4_output_finish,
82 .extract_input = xfrm4_extract_input,
83 .extract_output = xfrm4_extract_output,
84 .transport_finish = xfrm4_transport_finish,
85};
86
87void __init xfrm4_state_init(void)
88{
89 xfrm_state_register_afinfo(&xfrm4_state_afinfo);
90}
91
92#if 0
93void __exit xfrm4_state_fini(void)
94{
95 xfrm_state_unregister_afinfo(&xfrm4_state_afinfo);
96}
97#endif /* 0 */
98