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-rw-r--r--src/reclaim-attribute/plugin_reclaim_attribute_gnuid.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/src/reclaim-attribute/plugin_reclaim_attribute_gnuid.c b/src/reclaim-attribute/plugin_reclaim_attribute_gnuid.c
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1/*
2 This file is part of GNUnet
3 Copyright (C) 2013, 2014, 2016 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17*/
18
19/**
20 * @file reclaim-attribute/plugin_reclaim_attribute_gnuid.c
21 * @brief identity attribute plugin to provide the API for fundamental
22 * attribute types.
23 *
24 * @author Martin Schanzenbach
25 */
26#include "platform.h"
27#include "gnunet_util_lib.h"
28#include "gnunet_reclaim_attribute_plugin.h"
29#include <inttypes.h>
30
31
32/**
33 * Convert the 'value' of an attribute to a string.
34 *
35 * @param cls closure, unused
36 * @param type type of the attribute
37 * @param data value in binary encoding
38 * @param data_size number of bytes in @a data
39 * @return NULL on error, otherwise human-readable representation of the value
40 */
41static char *
42gnuid_value_to_string (void *cls,
43 uint32_t type,
44 const void *data,
45 size_t data_size)
46{
47
48 switch (type)
49 {
50 case GNUNET_RECLAIM_ATTRIBUTE_TYPE_STRING:
51 return GNUNET_strndup (data, data_size);
52 default:
53 return NULL;
54 }
55}
56
57
58/**
59 * Convert human-readable version of a 'value' of an attribute to the binary
60 * representation.
61 *
62 * @param cls closure, unused
63 * @param type type of the attribute
64 * @param s human-readable string
65 * @param data set to value in binary encoding (will be allocated)
66 * @param data_size set to number of bytes in @a data
67 * @return #GNUNET_OK on success
68 */
69static int
70gnuid_string_to_value (void *cls,
71 uint32_t type,
72 const char *s,
73 void **data,
74 size_t *data_size)
75{
76 if (NULL == s)
77 return GNUNET_SYSERR;
78 switch (type)
79 {
80
81 case GNUNET_RECLAIM_ATTRIBUTE_TYPE_STRING:
82 *data = GNUNET_strdup (s);
83 *data_size = strlen (s);
84 return GNUNET_OK;
85 default:
86 return GNUNET_SYSERR;
87 }
88}
89
90
91/**
92 * Mapping of attribute type numbers to human-readable
93 * attribute type names.
94 */
95static struct {
96 const char *name;
97 uint32_t number;
98} gnuid_name_map[] = {
99 { "STRING", GNUNET_RECLAIM_ATTRIBUTE_TYPE_STRING },
100 { NULL, UINT32_MAX }
101};
102
103
104/**
105 * Convert a type name to the corresponding number.
106 *
107 * @param cls closure, unused
108 * @param gnuid_typename name to convert
109 * @return corresponding number, UINT32_MAX on error
110 */
111static uint32_t
112gnuid_typename_to_number (void *cls,
113 const char *gnuid_typename)
114{
115 unsigned int i;
116
117 i=0;
118 while ( (NULL != gnuid_name_map[i].name) &&
119 (0 != strcasecmp (gnuid_typename,
120 gnuid_name_map[i].name)) )
121 i++;
122 return gnuid_name_map[i].number;
123}
124
125
126/**
127 * Convert a type number (i.e. 1) to the corresponding type string
128 *
129 * @param cls closure, unused
130 * @param type number of a type to convert
131 * @return corresponding typestring, NULL on error
132 */
133static const char *
134gnuid_number_to_typename (void *cls,
135 uint32_t type)
136{
137 unsigned int i;
138
139 i=0;
140 while ( (NULL != gnuid_name_map[i].name) &&
141 (type != gnuid_name_map[i].number) )
142 i++;
143 return gnuid_name_map[i].name;
144}
145
146
147/**
148 * Entry point for the plugin.
149 *
150 * @param cls NULL
151 * @return the exported block API
152 */
153void *
154libgnunet_plugin_reclaim_attribute_gnuid_init (void *cls)
155{
156 struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions *api;
157
158 api = GNUNET_new (struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions);
159 api->value_to_string = &gnuid_value_to_string;
160 api->string_to_value = &gnuid_string_to_value;
161 api->typename_to_number = &gnuid_typename_to_number;
162 api->number_to_typename = &gnuid_number_to_typename;
163 return api;
164}
165
166
167/**
168 * Exit point from the plugin.
169 *
170 * @param cls the return value from #libgnunet_plugin_block_test_init()
171 * @return NULL
172 */
173void *
174libgnunet_plugin_reclaim_attribute_gnuid_done (void *cls)
175{
176 struct GNUNET_RECLAIM_ATTRIBUTE_PluginFunctions *api = cls;
177
178 GNUNET_free (api);
179 return NULL;
180}
181
182/* end of plugin_reclaim_attribute_type_gnuid.c */