bonding: IGMP handling cleanup
[linux-2.6.git] / net / ipv4 / xfrm4_state.c
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
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
23 static void
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)
42 {
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
54 int xfrm4_extract_header(struct sk_buff *skb)
55 {
56         struct iphdr *iph = ip_hdr(skb);
57
58         XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
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;
63         XFRM_MODE_SKB_CB(skb)->optlen = iph->ihl * 4 - sizeof(*iph);
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
70 static struct xfrm_state_afinfo xfrm4_state_afinfo = {
71         .family                 = AF_INET,
72         .proto                  = IPPROTO_IPIP,
73         .eth_proto              = htons(ETH_P_IP),
74         .owner                  = THIS_MODULE,
75         .init_flags             = xfrm4_init_flags,
76         .init_tempsel           = __xfrm4_init_tempsel,
77         .init_temprop           = xfrm4_init_temprop,
78         .output                 = xfrm4_output,
79         .extract_input          = xfrm4_extract_input,
80         .extract_output         = xfrm4_extract_output,
81         .transport_finish       = xfrm4_transport_finish,
82 };
83
84 void __init xfrm4_state_init(void)
85 {
86         xfrm_state_register_afinfo(&xfrm4_state_afinfo);
87 }
88
89 #if 0
90 void __exit xfrm4_state_fini(void)
91 {
92         xfrm_state_unregister_afinfo(&xfrm4_state_afinfo);
93 }
94 #endif  /*  0  */
95