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
|
/*
* Copyright (c) 2017-2019 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 <limits.h>
#include <src/config.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <parc/algol/parc_BufferComposer.h>
#include <parc/algol/parc_Hash.h>
#include <parc/algol/parc_Memory.h>
#include <src/core/messageHandler.h>
#include <src/core/name.h>
#include <parc/algol/parc_Hash.h>
#include <parc/assert/parc_Assert.h>
#define IPv6_TYPE 6
#define IPv4_TYPE 4
// assumption: the IPv6 address is the name, the TCP segment number is the ICN
// segment
struct name {
NameBitvector *content_name;
uint32_t segment;
uint32_t name_hash;
// the refcount is shared between all copies
unsigned *refCountPtr;
};
// =====================================================
static unsigned _getRefCount(const Name *name) { return *name->refCountPtr; }
static void _incrementRefCount(Name *name) {
parcAssertTrue(*name->refCountPtr > 0,
"Illegal State: Trying to increment a 0 refcount!");
(*name->refCountPtr)++;
}
static void _decrementRefCount(Name *name) {
parcAssertTrue(*name->refCountPtr > 0,
"Illegal State: Trying to decrement a 0 refcount!");
(*name->refCountPtr)--;
}
static uint32_t _computeHash(Name *name) {
parcAssertNotNull(name, "Parameter must be non-null pointer");
uint32_t hash1 = nameBitvector_GetHash32(name->content_name);
return parcHash32_Data_Cumulative((const uint8_t *)&name->segment, 4, hash1);
}
// ============================================================================
Name *name_CreateFromPacket(const uint8_t *packet, MessagePacketType type) {
Name *name = parcMemory_AllocateAndClear(sizeof(Name));
parcAssertNotNull(name, "parcMemory_AllocateAndClear(%zu) returned NULL",
sizeof(Name));
if (messageHandler_GetIPPacketType(packet) == IPv6_TYPE) {
if (type == MessagePacketType_Interest) {
name->content_name = nameBitvector_CreateFromIn6Addr(
(struct in6_addr *)messageHandler_GetDestination(packet), 128);
} else if (type == MessagePacketType_ContentObject) {
name->content_name = nameBitvector_CreateFromIn6Addr(
(struct in6_addr *)messageHandler_GetSource(packet), 128);
} else {
parcMemory_Deallocate((void **)&name);
return NULL;
}
} else if (messageHandler_GetIPPacketType(packet) == IPv4_TYPE) {
if (type == MessagePacketType_Interest) {
name->content_name = nameBitvector_CreateFromInAddr(
*((uint32_t *)messageHandler_GetDestination(packet)), 32);
} else if (type == MessagePacketType_ContentObject) {
name->content_name = nameBitvector_CreateFromInAddr(
*((uint32_t *)messageHandler_GetSource(packet)), 32);
} else {
parcMemory_Deallocate((void **)&name);
return NULL;
}
} else {
printf("Error: unknown message type\n");
parcMemory_Deallocate((void **)&name);
return NULL;
}
name->segment = messageHandler_GetSegment(packet);
name->name_hash = _computeHash(name);
name->refCountPtr = parcMemory_Allocate(sizeof(unsigned));
parcAssertNotNull(name->refCountPtr, "parcMemory_Allocate(%zu) returned NULL",
sizeof(unsigned));
*name->refCountPtr = 1;
return name;
}
Name *name_CreateFromAddress(address_type addressType, union commandAddr addr,
uint8_t len) {
Name *name = parcMemory_AllocateAndClear(sizeof(Name));
parcAssertNotNull(name, "parcMemory_AllocateAndClear(%zu) returned NULL",
sizeof(Name));
if (addressType == ADDR_INET) {
name->content_name = nameBitvector_CreateFromInAddr(addr.ipv4, len);
} else if (addressType == ADDR_INET6) {
name->content_name = nameBitvector_CreateFromIn6Addr(&addr.ipv6, len);
} else {
parcTrapNotImplemented("Unkown packet type");
}
name->segment = 0;
name->name_hash = _computeHash(name);
name->refCountPtr = parcMemory_Allocate(sizeof(unsigned));
parcAssertNotNull(name->refCountPtr, "parcMemory_Allocate(%zu) returned NULL",
sizeof(unsigned));
*name->refCountPtr = 1;
return name;
}
void name_Release(Name **namePtr) {
parcAssertNotNull(namePtr, "Parameter must be non-null double pointer");
parcAssertNotNull(*namePtr, "Parameter must dereference to non-null pointer");
Name *name = *namePtr;
_decrementRefCount(name);
if (_getRefCount(name) == 0) {
parcMemory_Deallocate((void **)&(name->refCountPtr));
nameBitvector_Destroy(&(name->content_name));
}
parcMemory_Deallocate((void **)&name);
*namePtr = NULL;
}
Name *name_Acquire(const Name *original) {
parcAssertNotNull(original, "Parameter must be non-null");
Name *copy = parcMemory_AllocateAndClear(sizeof(Name));
parcAssertNotNull(copy, "parcMemory_AllocateAndClear(%zu) returned NULL",
sizeof(Name));
memcpy(copy, original, sizeof(Name));
_incrementRefCount(copy);
return copy;
}
uint32_t name_HashCode(const Name *name) {
parcAssertNotNull(name, "Parameter must be non-null");
return name->name_hash;
}
NameBitvector *name_GetContentName(const Name *name) {
parcAssertNotNull(name, "Parameter must be non-null");
return name->content_name;
}
bool name_Equals(const Name *a, const Name *b) {
parcAssertNotNull(a, "Parameter a must be non-null");
parcAssertNotNull(b, "Parameter b must be non-null");
if ((nameBitvector_Equals(a->content_name, b->content_name) &&
a->segment == b->segment))
return true;
return false;
}
int name_Compare(const Name *a, const Name *b) {
parcAssertNotNull(a, "Parameter a must be non-null");
parcAssertNotNull(b, "Parameter b must be non-null");
if (a == NULL && b == NULL) {
return 0;
}
if (a == NULL) {
return -1;
}
if (b == NULL) {
return +1;
}
int res = nameBitvector_Compare(a->content_name, b->content_name);
if (res != 0) {
return res;
} else {
if (a->segment < b->segment) {
return -1;
} else if (a->segment > b->segment) {
return +1;
} else {
return 0;
}
}
}
bool name_StartsWith(const Name *name, const Name *prefix) {
parcAssertNotNull(name, "Parameter name must be non-null");
parcAssertNotNull(prefix, "Parameter prefix must be non-null");
return nameBitvector_StartsWith(name->content_name, prefix->content_name);
}
char *name_ToString(const Name *name) {
char *output = malloc(128);
Address *packetAddr = nameBitvector_ToAddress(name_GetContentName(name));
sprintf(output, "name: %s seq: %u", addressToString(packetAddr),
name->segment);
addressDestroy(&packetAddr);
return output;
}
void name_setLen(const Name *name, uint8_t len) {
nameBitvector_setLen(name->content_name, len);
}
|
