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
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
|
/*
* Copyright (c) 2017-2020 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 __HICN_DPO_H__
#define __HICN_DPO_H__
#include <vnet/vnet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/adj/adj_midchain.h>
#include "face.h"
#include "../error.h"
/**
* @brief Initialize the internal structures of the dpo ip face module.
*/
//void hicn_dpo_ip_module_init (void);
/**
* @brief Retrieve a vector of faces from the ip4 local address and returns its index.
*
* @param vec: Result of the lookup. If no face exists for the local address vec = NULL
* @param hicnb_flags: Flags that indicate whether the face is an application
* face or not
* @param local_addr: Ip v4 nat address of the face
* @param sw_if: software interface id of the face
*
* @result HICN_ERROR_FACE_NOT_FOUND if the face does not exist, otherwise HICN_ERROR_NONE.
*/
always_inline int
hicn_dpo_face_ip4_lock (hicn_face_id_t * face_id,
u32 * in_faces_vec_id,
u8 * hicnb_flags,
const ip4_address_t * nat_addr)
{
ip46_address_t ip_address = {0};
ip46_address_set_ip4(&ip_address, nat_addr);
hicn_face_input_faces_t *in_faces_vec =
hicn_face_get_vec (&ip_address, &hicn_face_vec_hashtb);
if (PREDICT_FALSE (in_faces_vec == NULL))
return HICN_ERROR_FACE_NOT_FOUND;
*in_faces_vec_id = in_faces_vec->vec_id;
hicn_face_t *face = hicn_dpoi_get_from_idx (in_faces_vec->face_id);
*hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
*hicnb_flags |=
(face->flags & HICN_FACE_FLAGS_APPFACE_PROD) >>
HICN_FACE_FLAGS_APPFACE_PROD_BIT;
*face_id = in_faces_vec->face_id;
return HICN_ERROR_NONE;
}
/**
* @brief Retrieve a face from the ip6 local address and returns its dpo. This
* method adds a lock on the face state.
*
* @param dpo: Result of the lookup. If the face doesn't exist dpo = NULL
* @param hicnb_flags: Flags that indicate whether the face is an application
* face or not
* @param nat_addr: Ip v6 nat address of the face
* @param sw_if: software interface id of the face
*
* @result HICN_ERROR_FACE_NOT_FOUND if the face does not exist, otherwise HICN_ERROR_NONE.
*/
always_inline int
hicn_dpo_face_ip6_lock (hicn_face_id_t * face_id,
u32 * in_faces_vec_id,
u8 * hicnb_flags,
const ip6_address_t * nat_addr)
{
hicn_face_input_faces_t *in_faces_vec =
hicn_face_get_vec ((ip46_address_t *)nat_addr, &hicn_face_vec_hashtb);
if (PREDICT_FALSE (in_faces_vec == NULL))
return HICN_ERROR_FACE_NOT_FOUND;
*in_faces_vec_id = in_faces_vec->vec_id;
hicn_face_t *face = hicn_dpoi_get_from_idx (in_faces_vec->face_id);
*hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
*hicnb_flags |=
(face->flags & HICN_FACE_FLAGS_APPFACE_PROD) >>
HICN_FACE_FLAGS_APPFACE_PROD_BIT;
*face_id = in_faces_vec->face_id;
return HICN_ERROR_NONE;
}
/**
* @brief Call back to get the adj of the tunnel
*/
static adj_walk_rc_t
hicn4_iface_adj_walk_cb (adj_index_t ai,
void *ctx)
{
hicn_face_t *face = (hicn_face_t *)ctx;
dpo_set(&face->dpo, DPO_ADJACENCY_MIDCHAIN, DPO_PROTO_IP4, ai);
adj_nbr_midchain_stack(ai, &face->dpo);
return (ADJ_WALK_RC_CONTINUE);
}
/**
* @brief Retrieve, or create if it doesn't exist, a face from the ip6 local
* address and returns its dpo. This method adds a lock on the face state.
*
* @param dpo: Result of the lookup
* @param hicnb_flags: Flags that indicate whether the face is an application
* face or not
* @param nat_addr: Ip v4 remote address of the face
* @param sw_if: software interface id of the face
* @param node_index: vlib edge index to use in the packet processing
*/
always_inline void
hicn_dpo_iface_ip4_add_and_lock (hicn_face_id_t * index,
u8 * hicnb_flags,
const ip4_address_t * nat_addr,
u32 sw_if, u32 node_index)
{
/*All (complete) faces are indexed by remote addess as well */
ip46_address_t ip_address = {0};
ip46_address_set_ip4(&ip_address, nat_addr);
/* if the face exists, it adds a lock */
hicn_face_t *face =
hicn_face_get (&ip_address, sw_if, &hicn_face_hashtb);
if (face == NULL)
{
hicn_face_id_t idx;
hicn_iface_add (&ip_address, sw_if, &idx, DPO_PROTO_IP4);
face = hicn_dpoi_get_from_idx(idx);
if (nat_addr->as_u32 == 0)
{
adj_nbr_walk(face->sw_if,
FIB_PROTOCOL_IP4,
hicn4_iface_adj_walk_cb,
face);
}
else
{
face->dpo.dpoi_type = DPO_FIRST;
face->dpo.dpoi_proto = DPO_PROTO_IP4;
face->dpo.dpoi_index = ~0;
face->dpo.dpoi_next_node = node_index;
}
*hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
*index = idx;
return;
}
else
{
/* unlock the face. We don't take a lock on each interest we receive */
hicn_face_id_t face_id = hicn_dpoi_get_index(face);
hicn_face_unlock_with_id(face_id);
}
/* Code replicated on purpose */
*hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
*hicnb_flags |=
(face->flags & HICN_FACE_FLAGS_APPFACE_PROD) >>
HICN_FACE_FLAGS_APPFACE_PROD_BIT;
*index = hicn_dpoi_get_index (face);
}
/**
* @brief Call back to get the adj of the tunnel
*/
static adj_walk_rc_t
hicn6_iface_adj_walk_cb (adj_index_t ai,
void *ctx)
{
hicn_face_t *face = (hicn_face_t *)ctx;
ip_adjacency_t *adj = adj_get(ai);
if ((adj->lookup_next_index == IP_LOOKUP_NEXT_MIDCHAIN) ||
(adj->lookup_next_index == IP_LOOKUP_NEXT_MCAST_MIDCHAIN))
{
dpo_set(&face->dpo, DPO_ADJACENCY_MIDCHAIN, adj->ia_nh_proto, ai);
adj_nbr_midchain_stack(ai, &face->dpo);
}
return (ADJ_WALK_RC_CONTINUE);
}
/**
* @brief Retrieve, or create if it doesn't exist, a face from the ip6 local
* address and returns its dpo. This method adds a lock on the face state.
*
* @param dpo: Result of the lookup
* @param hicnb_flags: Flags that indicate whether the face is an application
* face or not
* @param nat_addr: Ip v6 remote address of the face
* @param sw_if: software interface id of the face
* @param node_index: vlib edge index to use in the packet processing
*/
always_inline void
hicn_dpo_iface_ip6_add_and_lock (hicn_face_id_t * index,
u8 * hicnb_flags,
const ip6_address_t * nat_addr,
u32 sw_if, u32 node_index)
{
/*All (complete) faces are indexed by remote addess as well */
/* if the face exists, it adds a lock */
hicn_face_t *face =
hicn_face_get ((ip46_address_t *)nat_addr, sw_if, &hicn_face_hashtb);
if (face == NULL)
{
hicn_face_id_t idx;
hicn_iface_add ((ip46_address_t *) nat_addr, sw_if, &idx, DPO_PROTO_IP6);
face = hicn_dpoi_get_from_idx(idx);
face->dpo.dpoi_type = DPO_FIRST;
face->dpo.dpoi_proto = DPO_PROTO_IP6;
face->dpo.dpoi_index = ~0;
face->dpo.dpoi_next_node = node_index;
//if (ip46_address_is_zero((ip46_address_t *)nat_addr))
// {
adj_nbr_walk(face->sw_if,
FIB_PROTOCOL_IP6,
hicn6_iface_adj_walk_cb,
face);
// }
*hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
*index = idx;
return;
}
else
{
/* unlock the face. We don't take a lock on each interest we receive */
hicn_face_id_t face_id = hicn_dpoi_get_index(face);
hicn_face_unlock_with_id(face_id);
}
/* Code replicated on purpose */
*hicnb_flags = HICN_BUFFER_FLAGS_DEFAULT;
*hicnb_flags |=
(face->flags & HICN_FACE_FLAGS_APPFACE_PROD) >>
HICN_FACE_FLAGS_APPFACE_PROD_BIT;
*index = hicn_dpoi_get_index (face);
}
/* /\** */
/* * @brief Create an ip face and its corresponding dpo. Meant to be used for the */
/* * control plane. */
/* * */
/* * @param dpo: Data plane object that point to the face created. */
/* * @param local_addr: Ip v4 local address of the face */
/* * @param remote_addr: Ip v4 remote address of the face */
/* * @param sw_if: software interface id of the face */
/* * @param adj: Ip adjacency corresponding to the remote address in the face */
/* * @param node_index: vlib edge index to use in the packet processing */
/* * @param flags: Flags of the face */
/* * @param face_id: Identifier for the face (dpoi_index) */
/* * @return HICN_ERROR_FACE_ALREADY_CREATED if the face exists, otherwise HICN_ERROR_NONE */
/* *\/ */
/* int hicn_dpo_ip4_create (dpo_id_t * dpo, */
/* const ip4_address_t * local_addr, */
/* const ip4_address_t * remote_addr, */
/* u32 sw_if, */
/* adj_index_t adj, */
/* u32 node_index, */
/* hicn_face_flags_t flags, hicn_face_id_t * face_id); */
/* /\** */
/* * @brief Create an ip face and its corresponding dpo. Meant to be used for the */
/* * control plane. */
/* * */
/* * @param dpo: Data plane object that point to the face created. */
/* * @param local_addr: Ip v6 local address of the face */
/* * @param remote_addr: Ip v6 remote address of the face */
/* * @param sw_if: software interface id of the face */
/* * @param adj: Ip adjacency corresponding to the remote address in the face */
/* * @param node_index: vlib edge index to use in the packet processing */
/* * @param flags: Flags of the face */
/* * @param face_id: Identifier for the face (dpoi_index) */
/* * @return HICN_ERROR_FACE_ALREADY_CREATED if the face exists, otherwise HICN_ERROR_NONE */
/* *\/ */
/* int hicn_dpo_ip6_create (dpo_id_t * dpo, */
/* const ip6_address_t * local_addr, */
/* const ip6_address_t * remote_addr, */
/* u32 sw_if, */
/* adj_index_t adj, */
/* u32 node_index, */
/* hicn_face_flags_t flags, hicn_face_id_t * face_id); */
#endif // __HICN_DPO_IP_H__
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
