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
|
/*
* 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_SPD_POLICY_H__
#define __IPSEC_SPD_POLICY_H__
#include <vppinfra/bihash_40_8.h>
#include <vppinfra/bihash_16_8.h>
#include <vnet/ipsec/ipsec_spd.h>
/**
* calculated as max number of flows (2^10) divided by KVP_PER_PAGE (4)
*/
#define IPSEC_FP_HASH_LOOKUP_HASH_BUCKETS (1 << 8)
#define IPSEC_POLICY_PROTOCOL_ANY IP_PROTOCOL_RESERVED
/**
* This number is calculated as ceil power of 2 for the number
* sizeof(clib_bihash_kv_16_8_t)=24 * BIHASH_KVP_PER_PAGE=4 * COLLISIONS_NO=8
*
*/
#define IPSEC_FP_IP4_HASH_MEM_PER_BUCKET 1024
/**
* This number is calculated as ceil power of 2 for the number
* sizeof(clib_bihash_kv_40_8_t)=48 * BIHASH_KVP_PER_PAGE=4 * COLLISIONS_NO=8
*
*/
#define IPSEC_FP_IP6_HASH_MEM_PER_BUCKET 2048
#define foreach_ipsec_policy_action \
_ (0, BYPASS, "bypass") \
_ (1, DISCARD, "discard") \
_ (2, RESOLVE, "resolve") \
_ (3, PROTECT, "protect")
typedef enum
{
#define _(v, f, s) IPSEC_POLICY_ACTION_##f = v,
foreach_ipsec_policy_action
#undef _
} ipsec_policy_action_t;
#define IPSEC_POLICY_N_ACTION (IPSEC_POLICY_ACTION_PROTECT + 1)
typedef struct
{
ip46_address_t start, stop;
} ip46_address_range_t;
typedef struct
{
u16 start, stop;
} port_range_t;
/**
* @brief
* Policy packet & bytes counters
*/
extern vlib_combined_counter_main_t ipsec_spd_policy_counters;
/**
* @brief A Secruity Policy. An entry in an SPD
*/
typedef struct ipsec_policy_t_
{
u32 id;
i32 priority;
// the type of policy
ipsec_spd_policy_type_t type;
// Selector
u8 is_ipv6;
ip46_address_range_t laddr;
ip46_address_range_t raddr;
u8 protocol;
port_range_t lport;
port_range_t rport;
// Policy
ipsec_policy_action_t policy;
u32 sa_id;
u32 sa_index;
u32 fp_mask_type_id;
} ipsec_policy_t;
/**
* @brief Add/Delete a SPD
*/
extern int ipsec_add_del_policy (vlib_main_t * vm,
ipsec_policy_t * policy,
int is_add, u32 * stat_index);
extern u8 *format_ipsec_policy (u8 * s, va_list * args);
extern u8 *format_ipsec_policy_action (u8 * s, va_list * args);
extern uword unformat_ipsec_policy_action (unformat_input_t * input,
va_list * args);
extern int ipsec_policy_mk_type (bool is_outbound,
bool is_ipv6,
ipsec_policy_action_t action,
ipsec_spd_policy_type_t * type);
/* A 5-tuple used to calculate the bihash entry */
typedef union
{
struct
{
union
{
struct
{
u32 l3_zero_pad[6];
ip4_address_t laddr;
ip4_address_t raddr;
};
struct
{
ip6_address_t ip6_laddr;
ip6_address_t ip6_raddr;
};
};
union
{
struct
{
u16 lport;
u16 rport;
};
u32 spi;
};
u8 protocol;
u8 action;
u16 is_ipv6;
};
/* for ipv6 */
clib_bihash_kv_40_8_t kv_40_8;
/* for ipv4 */
struct
{
u64 padding_for_kv_16_8[3];
clib_bihash_kv_16_8_t kv_16_8;
};
} ipsec_fp_5tuple_t;
/*
* An element describing a particular policy mask,
* and refcount of policies with same mask.
*/
typedef struct
{
/** Required for pool_get_aligned */
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
ipsec_fp_5tuple_t mask;
u32 refcount; /* counts how many policies use this mask */
} ipsec_fp_mask_type_entry_t;
/*
* Bihash lookup value,
* contains an unordered vector of policies indices in policy pool.
*/
typedef union
{
u64 as_u64;
struct
{
u32 *fp_policies_ids;
};
} ipsec_fp_lookup_value_t;
/**
* @brief add or delete a fast path policy
*/
int ipsec_fp_add_del_policy (void *fp_spd, ipsec_policy_t *policy, int is_add,
u32 *stat_index);
static_always_inline int
ipsec_policy_is_equal (ipsec_policy_t *p1, ipsec_policy_t *p2)
{
if (p1->priority != p2->priority)
return 0;
if (p1->type != p2->type)
return (0);
if (p1->policy != p2->policy)
return (0);
if (p1->sa_id != p2->sa_id)
return (0);
if (p1->protocol != p2->protocol)
return (0);
if (p1->lport.start != p2->lport.start)
return (0);
if (p1->lport.stop != p2->lport.stop)
return (0);
if (p1->rport.start != p2->rport.start)
return (0);
if (p1->rport.stop != p2->rport.stop)
return (0);
if (p1->is_ipv6 != p2->is_ipv6)
return (0);
if (p2->is_ipv6)
{
if (p1->laddr.start.ip6.as_u64[0] != p2->laddr.start.ip6.as_u64[0])
return (0);
if (p1->laddr.start.ip6.as_u64[1] != p2->laddr.start.ip6.as_u64[1])
return (0);
if (p1->laddr.stop.ip6.as_u64[0] != p2->laddr.stop.ip6.as_u64[0])
return (0);
if (p1->laddr.stop.ip6.as_u64[1] != p2->laddr.stop.ip6.as_u64[1])
return (0);
if (p1->raddr.start.ip6.as_u64[0] != p2->raddr.start.ip6.as_u64[0])
return (0);
if (p1->raddr.start.ip6.as_u64[1] != p2->raddr.start.ip6.as_u64[1])
return (0);
if (p1->raddr.stop.ip6.as_u64[0] != p2->raddr.stop.ip6.as_u64[0])
return (0);
if (p1->laddr.stop.ip6.as_u64[1] != p2->laddr.stop.ip6.as_u64[1])
return (0);
}
else
{
if (p1->laddr.start.ip4.as_u32 != p2->laddr.start.ip4.as_u32)
return (0);
if (p1->laddr.stop.ip4.as_u32 != p2->laddr.stop.ip4.as_u32)
return (0);
if (p1->raddr.start.ip4.as_u32 != p2->raddr.start.ip4.as_u32)
return (0);
if (p1->raddr.stop.ip4.as_u32 != p2->raddr.stop.ip4.as_u32)
return (0);
}
return (1);
}
#endif /* __IPSEC_SPD_POLICY_H__ */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
