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 
39 {
40  char **name;
41 
42  unsigned int *rd_count;
43 
45 };
46 
47 
48 static void
49 cleanup_recordinfo (struct GnsRecordInfo *gnsrecord_info)
50 {
51  if (NULL != *(gnsrecord_info->rd))
52  {
53  for (int i = 0; i < *(gnsrecord_info->rd_count); i++)
54  {
55  if (NULL != (*(gnsrecord_info->rd))[i].data)
56  GNUNET_free ((char *) (*(gnsrecord_info->rd))[i].data);
57  }
58  GNUNET_free (*(gnsrecord_info->rd));
59  *(gnsrecord_info->rd) = NULL;
60  }
61  if (NULL != *(gnsrecord_info->name))
62  GNUNET_free (*(gnsrecord_info->name));
63  *(gnsrecord_info->name) = NULL;
64 }
65 
66 
75 static int
77 {
78  struct GNUNET_TIME_Absolute abs_expiration_time;
79  struct GNUNET_TIME_Relative rel_expiration_time;
80  const char *value;
81  const char *record_type;
82  const char *expiration_time;
83  int flag;
84  int unpack_state = 0;
85 
86  //interpret single gns record
87  unpack_state = json_unpack (data,
88  "{s:s, s:s, s:s, s?:i!}",
90  &value,
92  &record_type,
94  &expiration_time,
96  &flag);
97  if (0 != unpack_state)
98  {
100  "Error gnsdata object has a wrong format!\n");
101  return GNUNET_SYSERR;
102  }
104  if (UINT32_MAX == rd->record_type)
105  {
106  GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unsupported type\n");
107  return GNUNET_SYSERR;
108  }
110  value,
111  (void**)&rd->data,
112  &rd->data_size))
113  {
114  GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Value invalid for record type\n");
115  return GNUNET_SYSERR;
116  }
117 
118  if (0 == strcmp (expiration_time, GNUNET_JSON_GNSRECORD_NEVER))
119  {
121  }
122  else if (GNUNET_OK ==
123  GNUNET_STRINGS_fancy_time_to_absolute (expiration_time,
124  &abs_expiration_time))
125  {
126  rd->expiration_time = abs_expiration_time.abs_value_us;
127  }
128  else if (GNUNET_OK ==
129  GNUNET_STRINGS_fancy_time_to_relative (expiration_time,
130  &rel_expiration_time))
131  {
132  rd->expiration_time = rel_expiration_time.rel_value_us;
133  }
134  else
135  {
136  GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Expiration time invalid\n");
137  return GNUNET_SYSERR;
138  }
139  rd->flags = (enum GNUNET_GNSRECORD_Flags) flag;
140  return GNUNET_OK;
141 }
142 
143 
152 static int
153 parse_record_data (struct GnsRecordInfo *gnsrecord_info, json_t *data)
154 {
155  GNUNET_assert (NULL != data);
156  if (! json_is_array (data))
157  {
159  "Error gns record data JSON is not an array!\n");
160  return GNUNET_SYSERR;
161  }
162  *(gnsrecord_info->rd_count) = json_array_size (data);
163  *(gnsrecord_info->rd) = GNUNET_malloc (sizeof (struct GNUNET_GNSRECORD_Data) *
164  json_array_size (data));
165  size_t index;
166  json_t *value;
167  json_array_foreach (data, index, value)
168  {
169  if (GNUNET_OK != parse_record (value, &(*(gnsrecord_info->rd))[index]))
170  return GNUNET_SYSERR;
171  }
172  return GNUNET_OK;
173 }
174 
175 
176 static int
178  json_t *root,
179  struct GNUNET_JSON_Specification *spec)
180 {
181  struct GnsRecordInfo *gnsrecord_info;
182  int unpack_state = 0;
183  const char *name;
184  json_t *data;
185 
186  GNUNET_assert (NULL != root);
187  if (! json_is_object (root))
188  {
190  "Error record JSON is not an object!\n");
191  return GNUNET_SYSERR;
192  }
193  //interpret single gns record
194  unpack_state = json_unpack (root,
195  "{s:s, s:o!}",
197  &name,
199  &data);
200  if (0 != unpack_state)
201  {
203  "Error namestore records object has a wrong format!\n");
204  return GNUNET_SYSERR;
205  }
206  gnsrecord_info = (struct GnsRecordInfo *) spec->ptr;
207  *(gnsrecord_info->name) = GNUNET_strdup (name);
208  if (GNUNET_OK != parse_record_data (gnsrecord_info, data))
209  {
210  cleanup_recordinfo (gnsrecord_info);
211  return GNUNET_SYSERR;
212  }
213  return GNUNET_OK;
214 }
215 
216 
223 static void
225 {
226  struct GnsRecordInfo *gnsrecord_info = (struct GnsRecordInfo *) spec->ptr;
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  gnsrecord_info->rd = rd;
244  gnsrecord_info->name = name;
245  gnsrecord_info->rd_count = rd_count;
247  .cleaner = &clean_gnsrecordobject,
248  .cls = NULL,
249  .field = NULL,
250  .ptr = (struct GnsRecordInfo *)
251  gnsrecord_info,
252  .ptr_size = 0,
253  .size_ptr = NULL};
254  return ret;
255 }
#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:204
#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:353
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:408
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:78
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:175
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
#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.