aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/ipsec/ipsec.h
blob: af7584183224190324ad37c5c94a553159f0c83c (plain)
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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
/*
 * 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.
 */
#ifndef __IPSEC_H__
#define __IPSEC_H__

#include <vnet/ip/ip.h>
#include <vnet/crypto/crypto.h>
#include <vnet/feature/feature.h>

#include <vppinfra/types.h>
#include <vppinfra/cache.h>

#include <vnet/ipsec/ipsec_spd.h>
#include <vnet/ipsec/ipsec_spd_policy.h>
#include <vnet/ipsec/ipsec_sa.h>

typedef clib_error_t *(*add_del_sa_sess_cb_t) (u32 sa_index, u8 is_add);
typedef clib_error_t *(*check_support_cb_t) (ipsec_sa_t * sa);

typedef struct
{
  u8 *name;
  /* add/del callback */
  add_del_sa_sess_cb_t add_del_sa_sess_cb;
  /* check support function */
  check_support_cb_t check_support_cb;
  u32 ah4_encrypt_node_index;
  u32 ah4_decrypt_node_index;
  u32 ah4_encrypt_next_index;
  u32 ah4_decrypt_next_index;
  u32 ah6_encrypt_node_index;
  u32 ah6_decrypt_node_index;
  u32 ah6_encrypt_next_index;
  u32 ah6_decrypt_next_index;
} ipsec_ah_backend_t;

typedef struct
{
  u8 *name;
  /* add/del callback */
  add_del_sa_sess_cb_t add_del_sa_sess_cb;
  /* check support function */
  check_support_cb_t check_support_cb;
  u32 esp4_encrypt_node_index;
  u32 esp4_decrypt_node_index;
  u32 esp4_encrypt_next_index;
  u32 esp4_decrypt_next_index;
  u32 esp6_encrypt_node_index;
  u32 esp6_decrypt_node_index;
  u32 esp6_encrypt_next_index;
  u32 esp6_decrypt_next_index;
  u32 esp4_encrypt_tun_feature_index;
  u32 esp6_encrypt_tun_feature_index;
} ipsec_esp_backend_t;

typedef struct
{
  vnet_crypto_op_id_t enc_op_id;
  vnet_crypto_op_id_t dec_op_id;
  vnet_crypto_alg_t alg;
  u8 iv_size;
  u8 block_size;
  u8 icv_size;
} ipsec_main_crypto_alg_t;

typedef struct
{
  vnet_crypto_op_id_t op_id;
  vnet_crypto_alg_t alg;
  u8 icv_size;
} ipsec_main_integ_alg_t;

typedef struct
{
  vnet_crypto_op_t *crypto_ops;
  vnet_crypto_op_t *integ_ops;
} ipsec_per_thread_data_t;

typedef struct
{
  /* pool of tunnel instances */
  ipsec_spd_t *spds;
  /* Pool of security associations */
  ipsec_sa_t *sad;
  /* pool of policies */
  ipsec_policy_t *policies;

  uword *tunnel_index_by_key;

  /* convenience */
  vlib_main_t *vlib_main;
  vnet_main_t *vnet_main;

  /* hashes */
  uword *spd_index_by_spd_id;
  uword *spd_index_by_sw_if_index;
  uword *sa_index_by_sa_id;
  uword *ipsec4_if_pool_index_by_key;
  uword *ipsec6_if_pool_index_by_key;
  uword *ipsec_if_real_dev_by_show_dev;
  uword *ipsec_if_by_sw_if_index;
  uword *tun4_protect_by_key;
  uword *tun6_protect_by_key;

  /* node indices */
  u32 error_drop_node_index;
  u32 esp4_encrypt_node_index;
  u32 esp4_decrypt_node_index;
  u32 ah4_encrypt_node_index;
  u32 ah4_decrypt_node_index;
  u32 esp6_encrypt_node_index;
  u32 esp6_decrypt_node_index;
  u32 ah6_encrypt_node_index;
  u32 ah6_decrypt_node_index;
  /* next node indices */
  u32 esp4_encrypt_next_index;
  u32 esp4_decrypt_next_index;
  u32 ah4_encrypt_next_index;
  u32 ah4_decrypt_next_index;
  u32 esp6_encrypt_next_index;
  u32 esp6_decrypt_next_index;
  u32 ah6_encrypt_next_index;
  u32 ah6_decrypt_next_index;

  /* tun encrypt arcs and feature nodes */
  u32 esp4_encrypt_tun_feature_index;
  u32 esp6_encrypt_tun_feature_index;

  /* tun nodes to drop packets when no crypto alg set on outbound SA */
  u32 esp4_no_crypto_tun_feature_index;
  u32 esp6_no_crypto_tun_feature_index;

  /* pool of ah backends */
  ipsec_ah_backend_t *ah_backends;
  /* pool of esp backends */
  ipsec_esp_backend_t *esp_backends;
  /* index of current ah backend */
  u32 ah_current_backend;
  /* index of current esp backend */
  u32 esp_current_backend;
  /* index of default ah backend */
  u32 ah_default_backend;
  /* index of default esp backend */
  u32 esp_default_backend;

  /* crypto alg data */
  ipsec_main_crypto_alg_t *crypto_algs;

  /* crypto integ data */
  ipsec_main_integ_alg_t *integ_algs;

  /* per-thread data */
  ipsec_per_thread_data_t *ptd;

  /** Worker handoff */
  u32 ah4_enc_fq_index;
  u32 ah4_dec_fq_index;
  u32 ah6_enc_fq_index;
  u32 ah6_dec_fq_index;

  u32 esp4_enc_fq_index;
  u32 esp4_dec_fq_index;
  u32 esp6_enc_fq_index;
  u32 esp6_dec_fq_index;
  u32 esp4_enc_tun_fq_index;
  u32 esp6_enc_tun_fq_index;
  u32 esp4_dec_tun_fq_index;
  u32 esp6_dec_tun_fq_index;
} ipsec_main_t;

typedef enum ipsec_format_flags_t_
{
  IPSEC_FORMAT_BRIEF = 0,
  IPSEC_FORMAT_DETAIL = (1 << 0),
  IPSEC_FORMAT_INSECURE = (1 << 1),
} ipsec_format_flags_t;

extern ipsec_main_t ipsec_main;

clib_error_t *ipsec_add_del_sa_sess_cb (ipsec_main_t * im, u32 sa_index,
					u8 is_add);

clib_error_t *ipsec_check_support_cb (ipsec_main_t * im, ipsec_sa_t * sa);

extern vlib_node_registration_t ah4_encrypt_node;
extern vlib_node_registration_t ah4_decrypt_node;
extern vlib_node_registration_t ah6_encrypt_node;
extern vlib_node_registration_t ah6_decrypt_node;
extern vlib_node_registration_t esp4_encrypt_node;
extern vlib_node_registration_t esp4_decrypt_node;
extern vlib_node_registration_t esp6_encrypt_node;
extern vlib_node_registration_t esp6_decrypt_node;
extern vlib_node_registration_t esp4_encrypt_tun_node;
extern vlib_node_registration_t esp6_encrypt_tun_node;
extern vlib_node_registration_t esp4_decrypt_tun_node;
extern vlib_node_registration_t esp6_decrypt_tun_node;
extern vlib_node_registration_t ipsec4_if_input_node;
extern vlib_node_registration_t ipsec6_if_input_node;

/*
 * functions
 */
u8 *format_ipsec_replay_window (u8 * s, va_list * args);

/*
 *  inline functions
 */

static_always_inline u32
get_next_output_feature_node_index (vlib_buffer_t * b,
				    vlib_node_runtime_t * nr)
{
  u32 next;
  vlib_main_t *vm = vlib_get_main ();
  vlib_node_t *node = vlib_get_node (vm, nr->node_index);

  vnet_feature_next (&next, b);
  return node->next_nodes[next];
}

u32 ipsec_register_ah_backend (vlib_main_t * vm, ipsec_main_t * im,
			       const char *name,
			       const char *ah4_encrypt_node_name,
			       const char *ah4_decrypt_node_name,
			       const char *ah6_encrypt_node_name,
			       const char *ah6_decrypt_node_name,
			       check_support_cb_t ah_check_support_cb,
			       add_del_sa_sess_cb_t ah_add_del_sa_sess_cb);

u32 ipsec_register_esp_backend (vlib_main_t * vm, ipsec_main_t * im,
				const char *name,
				const char *esp4_encrypt_node_name,
				const char *esp4_encrypt_tun_node_name,
				const char *esp4_decrypt_node_name,
				const char *esp6_encrypt_node_name,
				const char *esp6_encrypt_tun_node_name,
				const char *esp6_decrypt_node_name,
				check_support_cb_t esp_check_support_cb,
				add_del_sa_sess_cb_t esp_add_del_sa_sess_cb);

int ipsec_select_ah_backend (ipsec_main_t * im, u32 ah_backend_idx);
int ipsec_select_esp_backend (ipsec_main_t * im, u32 esp_backend_idx);

clib_error_t *ipsec_rsc_in_use (ipsec_main_t * im);

always_inline ipsec_sa_t *
ipsec_sa_get (u32 sa_index)
{
  return (pool_elt_at_index (ipsec_main.sad, sa_index));
}

void ipsec_add_feature (const char *arc_name, const char *node_name,
			u32 * out_feature_index);


#endif /* __IPSEC_H__ */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */