GNUnet  0.11.x
plugin_gnsrecord_messenger.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2021 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  */
27 #include "platform.h"
28 #include "gnunet_util_lib.h"
29 #include "gnunet_gnsrecord_lib.h"
32 
33 
43 static char *
45  uint32_t type,
46  const void *data,
47  size_t data_size)
48 {
49  (void) cls;
50  switch (type)
51  {
53  {
54  if (data_size != sizeof(struct GNUNET_MESSENGER_RoomEntryRecord))
55  {
56  GNUNET_break_op (0);
57  return NULL;
58  }
59 
61 
62  char *door = GNUNET_CRYPTO_eddsa_public_key_to_string (&(record->door.public_key));
63  char *key = GNUNET_STRINGS_data_to_string_alloc (&(record->key), sizeof(struct GNUNET_HashCode));
64 
65  char *ret;
66  GNUNET_asprintf (&ret, "%s-%s", door, key);
67  GNUNET_free (key);
68  GNUNET_free (door);
69  return ret;
70  }
71 
72  default:
73  return NULL;
74  }
75 }
76 
77 
89 static int
91  uint32_t type,
92  const char *s,
93  void **data,
94  size_t *data_size)
95 {
96  (void) cls;
97  if (NULL == s)
98  {
99  GNUNET_break (0);
100  return GNUNET_SYSERR;
101  }
102 
103  switch (type)
104  {
106  {
107  char key [103];
108  const char *dash;
109  struct GNUNET_PeerIdentity door;
110 
111  if ((NULL == (dash = strchr (s, '-'))) ||
112  (1 != sscanf (s, "%103s-", key)) ||
114  strlen (dash + 1),
115  &(door.public_key))))
116  {
118  _ ("Unable to parse MESSENGER_ROOM_ENTRY record `%s'\n"),
119  s);
120  return GNUNET_SYSERR;
121  }
122 
125  );
126 
128  strlen (key),
129  &(record->key),
130  sizeof(struct GNUNET_HashCode)))
131  {
133  _ ("Unable to parse MESSENGER_ROOM_ENTRY record `%s'\n"),
134  s);
136  return GNUNET_SYSERR;
137  }
138 
139  record->door = door;
140  *data = record;
142  return GNUNET_OK;
143  }
144 
145  default:
146  return GNUNET_SYSERR;
147  }
148 }
149 
150 
155 static struct
156 {
157  const char *name;
158  uint32_t number;
159 } name_map[] = {
160  { "MESSENGER_ROOM_ENTRY", GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY },
161  { NULL, UINT32_MAX }
162 };
163 
164 
172 static uint32_t
174  const char *gns_typename)
175 {
176  unsigned int i;
177 
178  (void) cls;
179  i = 0;
180  while ((name_map[i].name != NULL) &&
181  (0 != strcasecmp (gns_typename, name_map[i].name)))
182  i++;
183  return name_map[i].number;
184 }
185 
186 
194 static const char *
196  uint32_t type)
197 {
198  unsigned int i;
199 
200  (void) cls;
201  i = 0;
202  while ((name_map[i].name != NULL) &&
203  (type != name_map[i].number))
204  i++;
205  return name_map[i].name;
206 }
207 
208 
215 void *
217 {
219 
220  (void) cls;
226  return api;
227 }
228 
229 
236 void *
238 {
240 
241  GNUNET_free (api);
242  return NULL;
243 }
#define GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY
Record type to share an entry of a messenger room.
static int ret
Return value of the commandline.
Definition: gnunet-abd.c:81
static size_t data_size
Number of bytes in data.
Definition: gnunet-abd.c:187
static void record(void *cls, size_t data_size, const void *data)
Process recorded audio data.
struct GNUNET_HashCode key
The key used in the DHT.
uint32_t data
The data value.
#define GNUNET_log(kind,...)
@ GNUNET_OK
Definition: gnunet_common.h:95
@ GNUNET_SYSERR
Definition: gnunet_common.h:93
char * GNUNET_CRYPTO_eddsa_public_key_to_string(const struct GNUNET_CRYPTO_EddsaPublicKey *pub)
Convert a public key to a string.
Definition: crypto_ecc.c:251
enum GNUNET_GenericReturnValue GNUNET_CRYPTO_eddsa_public_key_from_string(const char *enc, size_t enclen, struct GNUNET_CRYPTO_EddsaPublicKey *pub)
Convert a string representing a public key to a public key.
Definition: crypto_ecc.c:357
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
@ GNUNET_ERROR_TYPE_ERROR
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_free(ptr)
Wrapper around free.
char * GNUNET_STRINGS_data_to_string_alloc(const void *buf, size_t size)
Return the base32crockford encoding of the given buffer.
Definition: strings.c:754
enum GNUNET_GenericReturnValue GNUNET_STRINGS_string_to_data(const char *enc, size_t enclen, void *out, size_t out_size)
Convert CrockfordBase32 encoding back to data.
Definition: strings.c:779
#define _(String)
GNU gettext support macro.
Definition: platform.h:177
void * libgnunet_plugin_gnsrecord_messenger_done(void *cls)
Exit point from the plugin.
static const char * messenger_number_to_typename(void *cls, uint32_t type)
Convert a type number to the corresponding type string (e.g.
static struct @52 name_map[]
Mapping of record type numbers to human-readable record type names.
const char * name
static char * messenger_value_to_string(void *cls, uint32_t type, const void *data, size_t data_size)
Convert the 'value' of a record to a string.
void * libgnunet_plugin_gnsrecord_messenger_init(void *cls)
Entry point for the plugin.
static uint32_t messenger_typename_to_number(void *cls, const char *gns_typename)
Convert a type name (e.g.
static int messenger_string_to_value(void *cls, uint32_t type, const char *s, void **data, size_t *data_size)
Convert human-readable version of a 'value' of a record to the binary representation.
uint32_t number
Each plugin is required to return a pointer to a struct of this type as the return value from its ent...
GNUNET_GNSRECORD_TypenameToNumberFunction typename_to_number
Typename to number.
GNUNET_GNSRECORD_NumberToTypenameFunction number_to_typename
Number to typename.
GNUNET_GNSRECORD_ValueToStringFunction value_to_string
Conversion to string.
void * cls
Closure for all of the callbacks.
GNUNET_GNSRECORD_StringToValueFunction string_to_value
Conversion to binary.
A 512-bit hashcode.
A room entry record specifies which peer is hosting a given room and may also specify the key to ente...
struct GNUNET_PeerIdentity door
The peer identity of an open door to a room.
The identity of the host (wraps the signing key of the peer).
struct GNUNET_CRYPTO_EddsaPublicKey public_key
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model