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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <vnet/ipsec/ipsec.h>
static clib_error_t *
ipsec_call_add_del_callbacks (ipsec_main_t * im, ipsec_sa_t * sa,
u32 sa_index, int is_add)
{
ipsec_ah_backend_t *ab;
ipsec_esp_backend_t *eb;
switch (sa->protocol)
{
case IPSEC_PROTOCOL_AH:
ab = pool_elt_at_index (im->ah_backends, im->ah_current_backend);
if (ab->add_del_sa_sess_cb)
return ab->add_del_sa_sess_cb (sa_index, is_add);
break;
case IPSEC_PROTOCOL_ESP:
eb = pool_elt_at_index (im->esp_backends, im->esp_current_backend);
if (eb->add_del_sa_sess_cb)
return eb->add_del_sa_sess_cb (sa_index, is_add);
break;
}
return 0;
}
int
ipsec_add_del_sa (vlib_main_t * vm, ipsec_sa_t * new_sa, int is_add)
{
ipsec_main_t *im = &ipsec_main;
ipsec_sa_t *sa = 0;
uword *p;
u32 sa_index;
clib_error_t *err;
clib_warning ("id %u spi %u", new_sa->id, new_sa->spi);
p = hash_get (im->sa_index_by_sa_id, new_sa->id);
if (p && is_add)
return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
if (!p && !is_add)
return VNET_API_ERROR_NO_SUCH_ENTRY;
if (!is_add) /* delete */
{
sa_index = p[0];
sa = pool_elt_at_index (im->sad, sa_index);
if (ipsec_is_sa_used (sa_index))
{
clib_warning ("sa_id %u used in policy", sa->id);
return VNET_API_ERROR_SYSCALL_ERROR_1; /* sa used in policy */
}
hash_unset (im->sa_index_by_sa_id, sa->id);
err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
if (err)
return VNET_API_ERROR_SYSCALL_ERROR_1;
pool_put (im->sad, sa);
}
else /* create new SA */
{
pool_get (im->sad, sa);
clib_memcpy (sa, new_sa, sizeof (*sa));
sa_index = sa - im->sad;
hash_set (im->sa_index_by_sa_id, sa->id, sa_index);
err = ipsec_call_add_del_callbacks (im, sa, sa_index, 1);
if (err)
return VNET_API_ERROR_SYSCALL_ERROR_1;
}
return 0;
}
u8
ipsec_is_sa_used (u32 sa_index)
{
ipsec_main_t *im = &ipsec_main;
ipsec_tunnel_if_t *t;
ipsec_policy_t *p;
/* *INDENT-OFF* */
pool_foreach(p, im->policies, ({
if (p->policy == IPSEC_POLICY_ACTION_PROTECT)
{
if (p->sa_index == sa_index)
return 1;
}
}));
pool_foreach(t, im->tunnel_interfaces, ({
if (t->input_sa_index == sa_index)
return 1;
if (t->output_sa_index == sa_index)
return 1;
}));
/* *INDENT-ON* */
return 0;
}
int
ipsec_set_sa_key (vlib_main_t * vm, ipsec_sa_t * sa_update)
{
ipsec_main_t *im = &ipsec_main;
uword *p;
u32 sa_index;
ipsec_sa_t *sa = 0;
clib_error_t *err;
p = hash_get (im->sa_index_by_sa_id, sa_update->id);
if (!p)
return VNET_API_ERROR_SYSCALL_ERROR_1; /* no such sa-id */
sa_index = p[0];
sa = pool_elt_at_index (im->sad, sa_index);
/* new crypto key */
if (0 < sa_update->crypto_key_len)
{
clib_memcpy (sa->crypto_key, sa_update->crypto_key,
sa_update->crypto_key_len);
sa->crypto_key_len = sa_update->crypto_key_len;
}
/* new integ key */
if (0 < sa_update->integ_key_len)
{
clib_memcpy (sa->integ_key, sa_update->integ_key,
sa_update->integ_key_len);
sa->integ_key_len = sa_update->integ_key_len;
}
if (0 < sa_update->crypto_key_len || 0 < sa_update->integ_key_len)
{
err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
if (err)
return VNET_API_ERROR_SYSCALL_ERROR_1;
}
return 0;
}
u32
ipsec_get_sa_index_by_sa_id (u32 sa_id)
{
ipsec_main_t *im = &ipsec_main;
uword *p = hash_get (im->sa_index_by_sa_id, sa_id);
if (!p)
return ~0;
return p[0];
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
