1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* xfrm6_state.c: based on xfrm4_state.c
*
* Authors:
* Mitsuru KANDA @USAGI
* Kazunori MIYAZAWA @USAGI
* Kunihiro Ishiguro <kunihiro@ipinfusion.com>
* IPv6 support
* YOSHIFUJI Hideaki @USAGI
* Split up af-specific portion
*
*/
#include <net/xfrm.h>
#include <linux/pfkeyv2.h>
#include <linux/ipsec.h>
#include <net/ipv6.h>
#include <net/addrconf.h>
static struct xfrm_state_afinfo xfrm6_state_afinfo;
static void
__xfrm6_init_tempsel(struct xfrm_state *x, struct flowi *fl,
struct xfrm_tmpl *tmpl,
xfrm_address_t *daddr, xfrm_address_t *saddr)
{
/* Initialize temporary selector matching only
* to current session. */
ipv6_addr_copy((struct in6_addr *)&x->sel.daddr, &fl->fl6_dst);
ipv6_addr_copy((struct in6_addr *)&x->sel.saddr, &fl->fl6_src);
x->sel.dport = xfrm_flowi_dport(fl);
x->sel.dport_mask = ~0;
x->sel.sport = xfrm_flowi_sport(fl);
x->sel.sport_mask = ~0;
x->sel.prefixlen_d = 128;
x->sel.prefixlen_s = 128;
x->sel.proto = fl->proto;
x->sel.ifindex = fl->oif;
x->id = tmpl->id;
if (ipv6_addr_any((struct in6_addr*)&x->id.daddr))
memcpy(&x->id.daddr, daddr, sizeof(x->sel.daddr));
memcpy(&x->props.saddr, &tmpl->saddr, sizeof(x->props.saddr));
if (ipv6_addr_any((struct in6_addr*)&x->props.saddr))
memcpy(&x->props.saddr, saddr, sizeof(x->props.saddr));
if (tmpl->mode == XFRM_MODE_TUNNEL && ipv6_addr_any((struct in6_addr*)&x->props.saddr)) {
struct rt6_info *rt;
struct flowi fl_tunnel = {
.nl_u = {
.ip6_u = {
.daddr = *(struct in6_addr *)daddr,
}
}
};
if (!xfrm_dst_lookup((struct xfrm_dst **)&rt,
&fl_tunnel, AF_INET6)) {
ipv6_get_saddr(&rt->u.dst, (struct in6_addr *)daddr,
(struct in6_addr *)&x->props.saddr);
dst_release(&rt->u.dst);
}
}
x->props.mode = tmpl->mode;
x->props.reqid = tmpl->reqid;
x->props.family = AF_INET6;
}
static struct xfrm_state *
__xfrm6_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto)
{
unsigned h = __xfrm6_spi_hash(daddr, spi, proto);
struct xfrm_state *x;
list_for_each_entry(x, xfrm6_state_afinfo.state_byspi+h, byspi) {
if (x->props.family == AF_INET6 &&
spi == x->id.spi &&
ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)x->id.daddr.a6) &&
proto == x->id.proto) {
xfrm_state_hold(x);
return x;
}
}
return NULL;
}
static struct xfrm_state *
__xfrm6_find_acq(u8 mode, u32 reqid, u8 proto,
xfrm_address_t *daddr, xfrm_address_t *saddr,
int create)
{
struct xfrm_state *x, *x0;
unsigned h = __xfrm6_dst_hash(daddr);
x0 = NULL;
list_for_each_entry(x, xfrm6_state_afinfo.state_bydst+h, bydst) {
if (x->props.family == AF_INET6 &&
ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)x->id.daddr.a6) &&
mode == x->props.mode &&
proto == x->id.proto &&
ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)x->props.saddr.a6) &&
reqid == x->props.reqid &&
x->km.state == XFRM_STATE_ACQ &&
!x->id.spi) {
x0 = x;
break;
}
}
if (!x0 && create && (x0 = xfrm_state_alloc()) != NULL) {
ipv6_addr_copy((struct in6_addr *)x0->sel.daddr.a6,
(struct in6_addr *)daddr);
ipv6_addr_copy((struct in6_addr *)x0->sel.saddr.a6,
(struct in6_addr *)saddr);
x0->sel.prefixlen_d = 128;
x0->sel.prefixlen_s = 128;
ipv6_addr_copy((struct in6_addr *)x0->props.saddr.a6,
(struct in6_addr *)saddr);
x0->km.state = XFRM_STATE_ACQ;
ipv6_addr_copy((struct in6_addr *)x0->id.daddr.a6,
(struct in6_addr *)daddr);
x0->id.proto = proto;
x0->props.family = AF_INET6;
x0->props.mode = mode;
x0->props.reqid = reqid;
x0->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
xfrm_state_hold(x0);
x0->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
add_timer(&x0->timer);
xfrm_state_hold(x0);
list_add_tail(&x0->bydst, xfrm6_state_afinfo.state_bydst+h);
h = __xfrm6_src_hash(saddr);
xfrm_state_hold(x0);
list_add_tail(&x0->bysrc, xfrm6_state_afinfo.state_bysrc+h);
wake_up(&km_waitq);
}
if (x0)
xfrm_state_hold(x0);
return x0;
}
static struct xfrm_state_afinfo xfrm6_state_afinfo = {
.family = AF_INET6,
.init_tempsel = __xfrm6_init_tempsel,
.state_lookup = __xfrm6_state_lookup,
.find_acq = __xfrm6_find_acq,
};
void __init xfrm6_state_init(void)
{
xfrm_state_register_afinfo(&xfrm6_state_afinfo);
}
void xfrm6_state_fini(void)
{
xfrm_state_unregister_afinfo(&xfrm6_state_afinfo);
}
|
