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
|
/*
This file is part of GNUnet
Copyright (C) 2013, 2014, 2016 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file identity-attribute/plugin_identity_attribute_gnuid.c
* @brief identity attribute plugin to provide the API for fundamental
* attribute types.
*
* @author Martin Schanzenbach
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_identity_attribute_plugin.h"
#include <inttypes.h>
/**
* Convert the 'value' of an attribute to a string.
*
* @param cls closure, unused
* @param type type of the attribute
* @param data value in binary encoding
* @param data_size number of bytes in @a data
* @return NULL on error, otherwise human-readable representation of the value
*/
static char *
gnuid_value_to_string (void *cls,
uint32_t type,
const void *data,
size_t data_size)
{
switch (type)
{
case GNUNET_IDENTITY_ATTRIBUTE_TYPE_STRING:
return GNUNET_strndup (data, data_size);
default:
return NULL;
}
}
/**
* Convert human-readable version of a 'value' of an attribute to the binary
* representation.
*
* @param cls closure, unused
* @param type type of the attribute
* @param s human-readable string
* @param data set to value in binary encoding (will be allocated)
* @param data_size set to number of bytes in @a data
* @return #GNUNET_OK on success
*/
static int
gnuid_string_to_value (void *cls,
uint32_t type,
const char *s,
void **data,
size_t *data_size)
{
if (NULL == s)
return GNUNET_SYSERR;
switch (type)
{
case GNUNET_IDENTITY_ATTRIBUTE_TYPE_STRING:
*data = GNUNET_strdup (s);
*data_size = strlen (s);
return GNUNET_OK;
default:
return GNUNET_SYSERR;
}
}
/**
* Mapping of attribute type numbers to human-readable
* attribute type names.
*/
static struct {
const char *name;
uint32_t number;
} gnuid_name_map[] = {
{ "STRING", GNUNET_IDENTITY_ATTRIBUTE_TYPE_STRING },
{ NULL, UINT32_MAX }
};
/**
* Convert a type name to the corresponding number.
*
* @param cls closure, unused
* @param gnuid_typename name to convert
* @return corresponding number, UINT32_MAX on error
*/
static uint32_t
gnuid_typename_to_number (void *cls,
const char *gnuid_typename)
{
unsigned int i;
i=0;
while ( (NULL != gnuid_name_map[i].name) &&
(0 != strcasecmp (gnuid_typename,
gnuid_name_map[i].name)) )
i++;
return gnuid_name_map[i].number;
}
/**
* Convert a type number (i.e. 1) to the corresponding type string
*
* @param cls closure, unused
* @param type number of a type to convert
* @return corresponding typestring, NULL on error
*/
static const char *
gnuid_number_to_typename (void *cls,
uint32_t type)
{
unsigned int i;
i=0;
while ( (NULL != gnuid_name_map[i].name) &&
(type != gnuid_name_map[i].number) )
i++;
return gnuid_name_map[i].name;
}
/**
* Entry point for the plugin.
*
* @param cls NULL
* @return the exported block API
*/
void *
libgnunet_plugin_identity_attribute_gnuid_init (void *cls)
{
struct GNUNET_IDENTITY_ATTRIBUTE_PluginFunctions *api;
api = GNUNET_new (struct GNUNET_IDENTITY_ATTRIBUTE_PluginFunctions);
api->value_to_string = &gnuid_value_to_string;
api->string_to_value = &gnuid_string_to_value;
api->typename_to_number = &gnuid_typename_to_number;
api->number_to_typename = &gnuid_number_to_typename;
return api;
}
/**
* Exit point from the plugin.
*
* @param cls the return value from #libgnunet_plugin_block_test_init()
* @return NULL
*/
void *
libgnunet_plugin_identity_attribute_gnuid_done (void *cls)
{
struct GNUNET_IDENTITY_ATTRIBUTE_PluginFunctions *api = cls;
GNUNET_free (api);
return NULL;
}
/* end of plugin_identity_attribute_type_gnuid.c */
|
