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
|
/*
* Copyright (c) 2022 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 HICNLIGHT_INTEREST_MANIFEST_H
#define HICNLIGHT_INTEREST_MANIFEST_H
#include <string.h>
#include <stdbool.h>
#include <hicn/util/bitmap.h>
#include <hicn/base.h>
#include <hicn/name.h>
#include <hicn/common.h>
typedef enum
{
INT_MANIFEST_SPLIT_STRATEGY_NONE,
INT_MANIFEST_SPLIT_STRATEGY_MAX_N_SUFFIXES,
INT_MANIFEST_SPLIT_N_STRATEGIES,
} int_manifest_split_strategy_t;
#define MAX_SUFFIXES_IN_MANIFEST 256
#define DEFAULT_DISAGGREGATION_STRATEGY \
INT_MANIFEST_SPLIT_STRATEGY_MAX_N_SUFFIXES
#define DEFAULT_N_SUFFIXES_PER_SPLIT MAX_SUFFIXES_IN_MANIFEST
#define BITMAP_SIZE (MAX_SUFFIXES_IN_MANIFEST / WORD_WIDTH)
typedef struct
{
/* This can be 16 bits, but we use 32 bits for alignment */
uint32_t n_suffixes;
/* First suffix */
uint32_t padding;
hicn_uword request_bitmap[BITMAP_SIZE];
/* Followed by the list of prefixes to ask */
/* ... */
} interest_manifest_header_t;
static_assert (sizeof (interest_manifest_header_t) == 32 + 4 + 4,
"interest_manifest_header_t size must be exactly 40 bytes");
#define _interest_manifest_serialize_deserialize(manifest, first, second, \
size, serialize) \
do \
{ \
u32 n_suffixes = 0; \
if (serialize) \
n_suffixes = int_manifest_header->n_suffixes; \
\
int_manifest_header->n_suffixes = \
hicn_##first##_to_##second##_32 (int_manifest_header->n_suffixes); \
int_manifest_header->padding = \
hicn_##first##_to_##second##_32 (int_manifest_header->padding); \
\
for (unsigned i = 0; i < BITMAP_SIZE; i++) \
{ \
int_manifest_header->request_bitmap[i] = \
hicn_##first##_to_##second##_##size ( \
int_manifest_header->request_bitmap[i]); \
} \
\
hicn_name_suffix_t *suffix = \
(hicn_name_suffix_t *) (int_manifest_header + 1); \
if (!serialize) \
n_suffixes = int_manifest_header->n_suffixes; \
for (unsigned i = 0; i < n_suffixes; i++) \
{ \
*(suffix + i) = hicn_##first##_to_##second##_32 (*(suffix + i)); \
} \
} \
while (0)
#define _interest_manifest_serialize(manifest, size) \
_interest_manifest_serialize_deserialize (manifest, host, net, size, 1)
#define _interest_manifest_deserialize(manifest, size) \
_interest_manifest_serialize_deserialize (manifest, net, host, size, 0)
static inline void
interest_manifest_serialize (interest_manifest_header_t *int_manifest_header)
{
_interest_manifest_serialize (int_manifest_header, hicn_uword_bits);
}
static inline void
interest_manifest_deserialize (interest_manifest_header_t *int_manifest_header)
{
u32 n_suffixes = 0;
int_manifest_header->n_suffixes =
hicn_net_to_host_32 (int_manifest_header->n_suffixes);
int_manifest_header->padding =
hicn_net_to_host_32 (int_manifest_header->padding);
for (unsigned i = 0; i < BITMAP_SIZE; i++)
{
int_manifest_header->request_bitmap[i] =
hicn_net_to_host_64 (int_manifest_header->request_bitmap[i]);
}
hicn_name_suffix_t *suffix =
(hicn_name_suffix_t *) (int_manifest_header + 1);
n_suffixes = int_manifest_header->n_suffixes;
for (unsigned i = 0; i < n_suffixes; i++)
{
*(suffix + i) = hicn_net_to_host_32 (*(suffix + i));
}
}
static inline bool
interest_manifest_is_valid (interest_manifest_header_t *int_manifest_header,
size_t payload_length)
{
if (int_manifest_header->n_suffixes == 0 ||
int_manifest_header->n_suffixes > MAX_SUFFIXES_IN_MANIFEST)
{
return false;
}
hicn_uword empty_bitmap[BITMAP_SIZE] = { 0 };
if (memcmp (empty_bitmap, int_manifest_header->request_bitmap,
sizeof (empty_bitmap)) == 0)
{
return false;
}
if (payload_length - sizeof (interest_manifest_header_t) !=
int_manifest_header->n_suffixes * sizeof (u32))
{
return false;
}
return true;
}
static inline void
interest_manifest_add_suffix (interest_manifest_header_t *int_manifest_header,
hicn_name_suffix_t suffix)
{
hicn_name_suffix_t *start = (hicn_name_suffix_t *) (int_manifest_header + 1);
*(start + int_manifest_header->n_suffixes) = suffix;
hicn_uword *request_bitmap = int_manifest_header->request_bitmap;
bitmap_set_no_check (request_bitmap, int_manifest_header->n_suffixes);
int_manifest_header->n_suffixes++;
}
static inline void
interest_manifest_init (interest_manifest_header_t *int_manifest_header,
u32 fist_suffix)
{
int_manifest_header->n_suffixes = 0;
int_manifest_header->padding = 0;
memset (int_manifest_header->request_bitmap, 0,
sizeof (int_manifest_header->request_bitmap));
interest_manifest_add_suffix (int_manifest_header, fist_suffix);
}
static inline void
interest_manifest_del_suffix (interest_manifest_header_t *int_manifest_header,
hicn_uword pos)
{
bitmap_unset_no_check (int_manifest_header->request_bitmap, pos);
}
static inline size_t
interest_manifest_update_bitmap (const hicn_uword *initial_bitmap,
hicn_uword *bitmap_to_update, size_t start,
size_t n, size_t max_suffixes)
{
size_t i = start, n_ones = 0;
while (i < n)
{
if (bitmap_is_set_no_check (initial_bitmap, i))
{
bitmap_set_no_check (bitmap_to_update, i);
n_ones++;
}
i++;
if (n_ones == max_suffixes)
break;
}
return i;
}
#define _FIRST(h) (hicn_name_suffix_t *) (h + 1)
#define interest_manifest_foreach_suffix(header, suffix, pos) \
for (suffix = _FIRST (header) + bitmap_first_set_no_check ( \
header->request_bitmap, BITMAP_SIZE), \
pos = 0; \
suffix - _FIRST (header) < header->n_suffixes; \
pos = suffix - _FIRST (header) + 1, \
suffix = _FIRST (header) + \
bitmap_next_set_no_check (header->request_bitmap, \
suffix - _FIRST (header) + 1, \
BITMAP_SIZE), \
pos = suffix - _FIRST (header))
#endif /* HICNLIGHT_INTEREST_MANIFEST_H */
|
