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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/ipv6/xfrm6_state.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'net/ipv6/xfrm6_state.c')
-rw-r--r--net/ipv6/xfrm6_state.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c
new file mode 100644
index 000000000000..bf0d0abc3871
--- /dev/null
+++ b/net/ipv6/xfrm6_state.c
@@ -0,0 +1,136 @@
1/*
2 * xfrm6_state.c: based on xfrm4_state.c
3 *
4 * Authors:
5 * Mitsuru KANDA @USAGI
6 * Kazunori MIYAZAWA @USAGI
7 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
8 * IPv6 support
9 * YOSHIFUJI Hideaki @USAGI
10 * Split up af-specific portion
11 *
12 */
13
14#include <net/xfrm.h>
15#include <linux/pfkeyv2.h>
16#include <linux/ipsec.h>
17#include <net/ipv6.h>
18
19static struct xfrm_state_afinfo xfrm6_state_afinfo;
20
21static void
22__xfrm6_init_tempsel(struct xfrm_state *x, struct flowi *fl,
23 struct xfrm_tmpl *tmpl,
24 xfrm_address_t *daddr, xfrm_address_t *saddr)
25{
26 /* Initialize temporary selector matching only
27 * to current session. */
28 ipv6_addr_copy((struct in6_addr *)&x->sel.daddr, &fl->fl6_dst);
29 ipv6_addr_copy((struct in6_addr *)&x->sel.saddr, &fl->fl6_src);
30 x->sel.dport = xfrm_flowi_dport(fl);
31 x->sel.dport_mask = ~0;
32 x->sel.sport = xfrm_flowi_sport(fl);
33 x->sel.sport_mask = ~0;
34 x->sel.prefixlen_d = 128;
35 x->sel.prefixlen_s = 128;
36 x->sel.proto = fl->proto;
37 x->sel.ifindex = fl->oif;
38 x->id = tmpl->id;
39 if (ipv6_addr_any((struct in6_addr*)&x->id.daddr))
40 memcpy(&x->id.daddr, daddr, sizeof(x->sel.daddr));
41 memcpy(&x->props.saddr, &tmpl->saddr, sizeof(x->props.saddr));
42 if (ipv6_addr_any((struct in6_addr*)&x->props.saddr))
43 memcpy(&x->props.saddr, saddr, sizeof(x->props.saddr));
44 x->props.mode = tmpl->mode;
45 x->props.reqid = tmpl->reqid;
46 x->props.family = AF_INET6;
47}
48
49static struct xfrm_state *
50__xfrm6_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto)
51{
52 unsigned h = __xfrm6_spi_hash(daddr, spi, proto);
53 struct xfrm_state *x;
54
55 list_for_each_entry(x, xfrm6_state_afinfo.state_byspi+h, byspi) {
56 if (x->props.family == AF_INET6 &&
57 spi == x->id.spi &&
58 ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)x->id.daddr.a6) &&
59 proto == x->id.proto) {
60 xfrm_state_hold(x);
61 return x;
62 }
63 }
64 return NULL;
65}
66
67static struct xfrm_state *
68__xfrm6_find_acq(u8 mode, u32 reqid, u8 proto,
69 xfrm_address_t *daddr, xfrm_address_t *saddr,
70 int create)
71{
72 struct xfrm_state *x, *x0;
73 unsigned h = __xfrm6_dst_hash(daddr);
74
75 x0 = NULL;
76
77 list_for_each_entry(x, xfrm6_state_afinfo.state_bydst+h, bydst) {
78 if (x->props.family == AF_INET6 &&
79 ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)x->id.daddr.a6) &&
80 mode == x->props.mode &&
81 proto == x->id.proto &&
82 ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)x->props.saddr.a6) &&
83 reqid == x->props.reqid &&
84 x->km.state == XFRM_STATE_ACQ &&
85 !x->id.spi) {
86 x0 = x;
87 break;
88 }
89 }
90 if (!x0 && create && (x0 = xfrm_state_alloc()) != NULL) {
91 ipv6_addr_copy((struct in6_addr *)x0->sel.daddr.a6,
92 (struct in6_addr *)daddr);
93 ipv6_addr_copy((struct in6_addr *)x0->sel.saddr.a6,
94 (struct in6_addr *)saddr);
95 x0->sel.prefixlen_d = 128;
96 x0->sel.prefixlen_s = 128;
97 ipv6_addr_copy((struct in6_addr *)x0->props.saddr.a6,
98 (struct in6_addr *)saddr);
99 x0->km.state = XFRM_STATE_ACQ;
100 ipv6_addr_copy((struct in6_addr *)x0->id.daddr.a6,
101 (struct in6_addr *)daddr);
102 x0->id.proto = proto;
103 x0->props.family = AF_INET6;
104 x0->props.mode = mode;
105 x0->props.reqid = reqid;
106 x0->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
107 xfrm_state_hold(x0);
108 x0->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
109 add_timer(&x0->timer);
110 xfrm_state_hold(x0);
111 list_add_tail(&x0->bydst, xfrm6_state_afinfo.state_bydst+h);
112 wake_up(&km_waitq);
113 }
114 if (x0)
115 xfrm_state_hold(x0);
116 return x0;
117}
118
119static struct xfrm_state_afinfo xfrm6_state_afinfo = {
120 .family = AF_INET6,
121 .lock = RW_LOCK_UNLOCKED,
122 .init_tempsel = __xfrm6_init_tempsel,
123 .state_lookup = __xfrm6_state_lookup,
124 .find_acq = __xfrm6_find_acq,
125};
126
127void __init xfrm6_state_init(void)
128{
129 xfrm_state_register_afinfo(&xfrm6_state_afinfo);
130}
131
132void xfrm6_state_fini(void)
133{
134 xfrm_state_unregister_afinfo(&xfrm6_state_afinfo);
135}
136