[IPSEC]: exporting xfrm_state_afinfo
[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
15 static struct xfrm_state_afinfo xfrm4_state_afinfo;
16
17 static 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
24 static void
25 __xfrm4_init_tempsel(struct xfrm_state *x, struct flowi *fl,
26                      struct xfrm_tmpl *tmpl,
27                      xfrm_address_t *daddr, xfrm_address_t *saddr)
28 {
29         x->sel.daddr.a4 = fl->fl4_dst;
30         x->sel.saddr.a4 = fl->fl4_src;
31         x->sel.dport = xfrm_flowi_dport(fl);
32         x->sel.dport_mask = htons(0xffff);
33         x->sel.sport = xfrm_flowi_sport(fl);
34         x->sel.sport_mask = htons(0xffff);
35         x->sel.prefixlen_d = 32;
36         x->sel.prefixlen_s = 32;
37         x->sel.proto = fl->proto;
38         x->sel.ifindex = fl->oif;
39         x->id = tmpl->id;
40         if (x->id.daddr.a4 == 0)
41                 x->id.daddr.a4 = daddr->a4;
42         x->props.saddr = tmpl->saddr;
43         if (x->props.saddr.a4 == 0)
44                 x->props.saddr.a4 = saddr->a4;
45         x->props.mode = tmpl->mode;
46         x->props.reqid = tmpl->reqid;
47         x->props.family = AF_INET;
48 }
49
50 static struct xfrm_state_afinfo xfrm4_state_afinfo = {
51         .family                 = AF_INET,
52         .init_flags             = xfrm4_init_flags,
53         .init_tempsel           = __xfrm4_init_tempsel,
54         .output                 = xfrm4_output,
55 };
56
57 void __init xfrm4_state_init(void)
58 {
59         xfrm_state_register_afinfo(&xfrm4_state_afinfo);
60 }
61
62 #if 0
63 void __exit xfrm4_state_fini(void)
64 {
65         xfrm_state_unregister_afinfo(&xfrm4_state_afinfo);
66 }
67 #endif  /*  0  */
68