GNUnet  0.10.x
json_gnsrecord.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2009-2013 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  SPDX-License-Identifier: AGPL3.0-or-later
19  */
20 
26 #include "platform.h"
27 #include "gnunet_util_lib.h"
28 #include "gnunet_json_lib.h"
29 
30 #define GNUNET_JSON_GNSRECORD_VALUE "value"
31 #define GNUNET_JSON_GNSRECORD_RECORD_DATA "data"
32 #define GNUNET_JSON_GNSRECORD_TYPE "record_type"
33 #define GNUNET_JSON_GNSRECORD_EXPIRATION_TIME "expiration_time"
34 #define GNUNET_JSON_GNSRECORD_FLAG "flag"
35 #define GNUNET_JSON_GNSRECORD_RECORD_NAME "record_name"
36 #define GNUNET_JSON_GNSRECORD_NEVER "never"
37 
38 struct GnsRecordInfo {
39  char **name;
40 
41  unsigned int *rd_count;
42 
44 };
45 
46 
47 static void
48 cleanup_recordinfo(struct GnsRecordInfo *gnsrecord_info)
49 {
50  if (NULL != *(gnsrecord_info->rd))
51  {
52  for (int i = 0; i < *(gnsrecord_info->rd_count); i++)
53  {
54  if (NULL != (*(gnsrecord_info->rd))[i].data)
55  GNUNET_free((char *)(*(gnsrecord_info->rd))[i].data);
56  }
57  GNUNET_free(*(gnsrecord_info->rd));
58  *(gnsrecord_info->rd) = NULL;
59  }
60  if (NULL != *(gnsrecord_info->name))
61  GNUNET_free(*(gnsrecord_info->name));
62  *(gnsrecord_info->name) = NULL;
63 }
64 
65 
74 static int
76 {
77  struct GNUNET_TIME_Absolute abs_expiration_time;
78  struct GNUNET_TIME_Relative rel_expiration_time;
79  const char *value;
80  const char *record_type;
81  const char *expiration_time;
82  int flag;
83  int unpack_state = 0;
84 
85  //interpret single gns record
86  unpack_state = json_unpack(data,
87  "{s:s, s:s, s:s, s?:i!}",
89  &value,
91  &record_type,
93  &expiration_time,
95  &flag);
96  if (0 != unpack_state)
97  {
99  "Error gnsdata object has a wrong format!\n");
100  return GNUNET_SYSERR;
101  }
103  if (UINT32_MAX == rd->record_type)
104  {
105  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Unsupported type\n");
106  return GNUNET_SYSERR;
107  }
109  value,
110  (void**)&rd->data,
111  &rd->data_size))
112  {
113  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Value invalid for record type\n");
114  return GNUNET_SYSERR;
115  }
116 
117  if (0 == strcmp(expiration_time, GNUNET_JSON_GNSRECORD_NEVER))
118  {
120  }
121  else if (GNUNET_OK ==
123  &abs_expiration_time))
124  {
125  rd->expiration_time = abs_expiration_time.abs_value_us;
126  }
127  else if (GNUNET_OK ==
129  &rel_expiration_time))
130  {
131  rd->expiration_time = rel_expiration_time.rel_value_us;
132  }
133  else
134  {
135  GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Expiration time invalid\n");
136  return GNUNET_SYSERR;
137  }
138  rd->flags = (enum GNUNET_GNSRECORD_Flags)flag;
139  return GNUNET_OK;
140 }
141 
142 
151 static int
152 parse_record_data(struct GnsRecordInfo *gnsrecord_info, json_t *data)
153 {
154  GNUNET_assert(NULL != data);
155  if (!json_is_array(data))
156  {
158  "Error gns record data JSON is not an array!\n");
159  return GNUNET_SYSERR;
160  }
161  *(gnsrecord_info->rd_count) = json_array_size(data);
162  *(gnsrecord_info->rd) = GNUNET_malloc(sizeof(struct GNUNET_GNSRECORD_Data) *
163  json_array_size(data));
164  size_t index;
165  json_t *value;
166  json_array_foreach(data, index, value)
167  {
168  if (GNUNET_OK != parse_record(value, &(*(gnsrecord_info->rd))[index]))
169  return GNUNET_SYSERR;
170  }
171  return GNUNET_OK;
172 }
173 
174 
175 static int
177  json_t *root,
178  struct GNUNET_JSON_Specification *spec)
179 {
180  struct GnsRecordInfo *gnsrecord_info;
181  int unpack_state = 0;
182  const char *name;
183  json_t *data;
184 
185  GNUNET_assert(NULL != root);
186  if (!json_is_object(root))
187  {
189  "Error record JSON is not an object!\n");
190  return GNUNET_SYSERR;
191  }
192  //interpret single gns record
193  unpack_state = json_unpack(root,
194  "{s:s, s:o!}",
196  &name,
198  &data);
199  if (0 != unpack_state)
200  {
202  "Error namestore records object has a wrong format!\n");
203  return GNUNET_SYSERR;
204  }
205  gnsrecord_info = (struct GnsRecordInfo *)spec->ptr;
206  *(gnsrecord_info->name) = GNUNET_strdup(name);
207  if (GNUNET_OK != parse_record_data(gnsrecord_info, data))
208  {
209  cleanup_recordinfo(gnsrecord_info);
210  return GNUNET_SYSERR;
211  }
212  return GNUNET_OK;
213 }
214 
215 
222 static void
224 {
225  struct GnsRecordInfo *gnsrecord_info = (struct GnsRecordInfo *)spec->ptr;
226 
227  GNUNET_free(gnsrecord_info);
228 }
229 
230 
239  unsigned int *rd_count,
240  char **name)
241 {
242  struct GnsRecordInfo *gnsrecord_info = GNUNET_new(struct GnsRecordInfo);
243 
244  gnsrecord_info->rd = rd;
245  gnsrecord_info->name = name;
246  gnsrecord_info->rd_count = rd_count;
248  .cleaner = &clean_gnsrecordobject,
249  .cls = NULL,
250  .field = NULL,
251  .ptr = (struct GnsRecordInfo *)
252  gnsrecord_info,
253  .ptr_size = 0,
254  .size_ptr = NULL };
255  return ret;
256 }
#define GNUNET_JSON_GNSRECORD_VALUE
#define GNUNET_JSON_GNSRECORD_RECORD_NAME
uint64_t rel_value_us
The actual value.
functions to parse JSON objects into GNUnet objects
uint32_t GNUNET_GNSRECORD_typename_to_number(const char *dns_typename)
Convert a type name (i.e.
Definition: gnsrecord.c:203
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_JSON_GNSRECORD_EXPIRATION_TIME
int GNUNET_STRINGS_fancy_time_to_relative(const char *fancy_time, struct GNUNET_TIME_Relative *rtime)
Convert a given fancy human-readable time to our internal representation.
Definition: strings.c:350
int GNUNET_STRINGS_fancy_time_to_absolute(const char *fancy_time, struct GNUNET_TIME_Absolute *atime)
Convert a given fancy human-readable time to our internal representation.
Definition: strings.c:401
static int parse_record_data(struct GnsRecordInfo *gnsrecord_info, json_t *data)
Parse given JSON object to gns record.
Entry in parser specification for GNUNET_JSON_parse().
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
size_t data_size
Number of bytes in data.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
static int ret
Final status code.
Definition: gnunet-arm.c:89
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
uint64_t abs_value_us
The actual value.
#define GNUNET_TIME_UNIT_FOREVER_ABS
Constant used to specify "forever".
static void cleanup_recordinfo(struct GnsRecordInfo *gnsrecord_info)
static int parse_gnsrecordobject(void *cls, json_t *root, struct GNUNET_JSON_Specification *spec)
const void * data
Binary value stored in the DNS record.
static char * value
Value of the record to add/remove.
uint64_t expiration_time
Expiration time for the DNS record.
struct GNUNET_JSON_Specification GNUNET_JSON_spec_gnsrecord(struct GNUNET_GNSRECORD_Data **rd, unsigned int *rd_count, char **name)
JSON Specification for GNS Records.
GNUNET_JSON_Parser parser
Function for how to parse this type of entry.
unsigned int * rd_count
int GNUNET_GNSRECORD_string_to_value(uint32_t type, const char *s, void **data, size_t *data_size)
Convert human-readable version of a &#39;value&#39; of a record to the binary representation.
Definition: gnsrecord.c:174
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
#define GNUNET_JSON_GNSRECORD_FLAG
void * ptr
Pointer, details specific to the parser.
#define GNUNET_JSON_GNSRECORD_TYPE
static int parse_record(json_t *data, struct GNUNET_GNSRECORD_Data *rd)
Parse given JSON object to gns record.
uint32_t record_type
Type of the GNS/DNS record.
static void clean_gnsrecordobject(void *cls, struct GNUNET_JSON_Specification *spec)
Cleanup data left from parsing the record.
#define GNUNET_log(kind,...)
Time for absolute times used by GNUnet, in microseconds.
GNUNET_GNSRECORD_Flags
Flags that can be set for a record.
struct GNUNET_GNSRECORD_Data ** rd
#define GNUNET_JSON_GNSRECORD_NEVER
enum GNUNET_GNSRECORD_Flags flags
Flags for the record.
#define GNUNET_JSON_GNSRECORD_RECORD_DATA
uint32_t data
The data value.
#define GNUNET_malloc(size)
Wrapper around malloc.
#define GNUNET_free(ptr)
Wrapper around free.
Time for relative time used by GNUnet, in microseconds.