GNUnet 0.21.1
plugin_gnsrecord_messenger.c File Reference
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Functions

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. More...
 
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. More...
 
static uint32_t messenger_typename_to_number (void *cls, const char *gns_typename)
 Convert a type name (e.g. More...
 
static const char * messenger_number_to_typename (void *cls, uint32_t type)
 Convert a type number to the corresponding type string (e.g. More...
 
void * libgnunet_plugin_gnsrecord_messenger_init (void *cls)
 Entry point for the plugin. More...
 
void * libgnunet_plugin_gnsrecord_messenger_done (void *cls)
 Exit point from the plugin. More...
 

Variables

struct {
   const char *   name
 
   uint32_t   number
 
name_map []
 Mapping of record type numbers to human-readable record type names. More...
 

Function Documentation

◆ messenger_value_to_string()

static char * messenger_value_to_string ( void *  cls,
uint32_t  type,
const void *  data,
size_t  data_size 
)
static

Convert the 'value' of a record to a string.

Parameters
clsclosure, unused
typetype of the record
datavalue in binary encoding
data_sizenumber of bytes in data
Returns
NULL on error, otherwise human-readable representation of the value

Definition at line 44 of file plugin_gnsrecord_messenger.c.

48{
49 (void) cls;
50 switch (type)
51 {
53 {
54 if (data_size != sizeof(struct GNUNET_MESSENGER_RoomEntryRecord))
55 {
57 return NULL;
58 }
59
61
63 &(record->door.public_key));
65 sizeof(struct
67
68 char *ret;
69 GNUNET_asprintf (&ret, "%s-%s", key, door);
72 return ret;
73 }
75 {
77 {
79 return NULL;
80 }
81
83
84 char *name = GNUNET_strndup (record->name, 256);
86 sizeof(uint32_t));
87
88 char *ret;
89 GNUNET_asprintf (&ret, "%s-%s", flags, name);
92 return ret;
93 }
94 default:
95 return NULL;
96 }
97}
static int ret
Final status code.
Definition: gnunet-arm.c:94
static void record(void *cls, size_t data_size, const void *data)
Process recorded audio data.
static char * data
The data to insert into the dht.
struct GNUNET_HashCode key
The key used in the DHT.
static uint32_t type
Type string converted to DNS type value.
static size_t data_size
Number of bytes in data.
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:252
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
#define GNUNET_strndup(a, length)
Wrapper around GNUNET_xstrndup_.
#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:764
const char * name
#define GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY
Record type to share an entry of a messenger room.
#define GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_DETAILS
Record type to store details about a messenger room.
A 512-bit hashcode.
A room details record specifies a custom name for a given room and some additional space for flags.
uint32_t flags
The flags of the room.
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.

References data, data_size, GNUNET_MESSENGER_RoomEntryRecord::door, GNUNET_MESSENGER_RoomDetailsRecord::flags, GNUNET_asprintf(), GNUNET_break_op, GNUNET_CRYPTO_eddsa_public_key_to_string(), GNUNET_free, GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_DETAILS, GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY, GNUNET_STRINGS_data_to_string_alloc(), GNUNET_strndup, key, name, record(), ret, and type.

Referenced by libgnunet_plugin_gnsrecord_messenger_init().

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◆ messenger_string_to_value()

static int messenger_string_to_value ( void *  cls,
uint32_t  type,
const char *  s,
void **  data,
size_t *  data_size 
)
static

Convert human-readable version of a 'value' of a record to the binary representation.

Parameters
clsclosure, unused
typetype of the record
shuman-readable string
dataset to value in binary encoding (will be allocated)
data_sizeset to number of bytes in data
Returns
GNUNET_OK on success

Definition at line 112 of file plugin_gnsrecord_messenger.c.

117{
118 (void) cls;
119 if (NULL == s)
120 {
121 GNUNET_break (0);
122 return GNUNET_SYSERR;
123 }
124
125 switch (type)
126 {
128 {
129 char key[104];
130 const char *dash;
131 struct GNUNET_PeerIdentity door;
132
133 if ((NULL == (dash = strchr (s, '-'))) ||
134 (1 != sscanf (s, "%103s-", key)) ||
136 strlen (
137 dash + 1),
138 &(door.
139 public_key))))
140 {
142 _ ("Unable to parse MESSENGER_ROOM_ENTRY record `%s'\n"),
143 s);
144 return GNUNET_SYSERR;
145 }
146
149 );
150
152 strlen (key),
153 &(record->key),
154 sizeof(struct
156 {
158 _ ("Unable to parse MESSENGER_ROOM_ENTRY record `%s'\n"),
159 s);
161 return GNUNET_SYSERR;
162 }
163
164 record->door = door;
165 *data = record;
167 return GNUNET_OK;
168 }
170 {
171 char flags[8];
172 const char *dash;
173
174 if ((NULL == (dash = strchr (s, '-'))) ||
175 (1 != sscanf (s, "%7s-", flags)) ||
176 (strlen (dash + 1) > 256))
177 {
179 _ ("Unable to parse MESSENGER_ROOM_DETAILS record `%s'\n"),
180 s);
181 return GNUNET_SYSERR;
182 }
183
186 );
187
189 strlen (flags),
190 &(record->flags),
191 sizeof(uint32_t)))
192 {
194 _ ("Unable to parse MESSENGER_ROOM_DETAILS record `%s'\n"),
195 s);
197 return GNUNET_SYSERR;
198 }
199
200 GNUNET_memcpy (record->name, dash + 1, strlen (dash + 1));
201
202 *data = record;
204 return GNUNET_OK;
205 }
206 default:
207 return GNUNET_SYSERR;
208 }
209}
#define GNUNET_log(kind,...)
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:358
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
@ GNUNET_OK
@ GNUNET_SYSERR
#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
#define GNUNET_new(type)
Allocate a struct or union of the given type.
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:789
#define _(String)
GNU gettext support macro.
Definition: platform.h:178
The identity of the host (wraps the signing key of the peer).
struct GNUNET_CRYPTO_EddsaPublicKey public_key

References _, data, data_size, GNUNET_MESSENGER_RoomEntryRecord::door, GNUNET_MESSENGER_RoomDetailsRecord::flags, GNUNET_break, GNUNET_CRYPTO_eddsa_public_key_from_string(), GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_DETAILS, GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY, GNUNET_log, GNUNET_memcpy, GNUNET_new, GNUNET_OK, GNUNET_STRINGS_string_to_data(), GNUNET_SYSERR, key, GNUNET_PeerIdentity::public_key, record(), and type.

Referenced by libgnunet_plugin_gnsrecord_messenger_init().

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◆ messenger_typename_to_number()

static uint32_t messenger_typename_to_number ( void *  cls,
const char *  gns_typename 
)
static

Convert a type name (e.g.

"AAAA") to the corresponding number.

Parameters
clsclosure, unused
gns_typenamename to convert
Returns
corresponding number, UINT32_MAX on error

Definition at line 235 of file plugin_gnsrecord_messenger.c.

237{
238 unsigned int i;
239
240 (void) cls;
241 i = 0;
242 while ((name_map[i].name != NULL) &&
243 (0 != strcasecmp (gns_typename, name_map[i].name)))
244 i++;
245 return name_map[i].number;
246}
static struct @39 name_map[]
Mapping of record type numbers to human-readable record type names.

References name, and name_map.

Referenced by libgnunet_plugin_gnsrecord_messenger_init().

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◆ messenger_number_to_typename()

static const char * messenger_number_to_typename ( void *  cls,
uint32_t  type 
)
static

Convert a type number to the corresponding type string (e.g.

1 to "A")

Parameters
clsclosure, unused
typenumber of a type to convert
Returns
corresponding typestring, NULL on error

Definition at line 257 of file plugin_gnsrecord_messenger.c.

259{
260 unsigned int i;
261
262 (void) cls;
263 i = 0;
264 while ((name_map[i].name != NULL) &&
265 (type != name_map[i].number))
266 i++;
267 return name_map[i].name;
268}

References name, name_map, and type.

Referenced by libgnunet_plugin_gnsrecord_messenger_init().

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◆ libgnunet_plugin_gnsrecord_messenger_init()

void * libgnunet_plugin_gnsrecord_messenger_init ( void *  cls)

Entry point for the plugin.

Parameters
clsNULL
Returns
the exported block API

Definition at line 278 of file plugin_gnsrecord_messenger.c.

279{
281
282 (void) cls;
288 return api;
289}
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.
static const char * messenger_number_to_typename(void *cls, uint32_t type)
Convert a type number to the corresponding type string (e.g.
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.
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.

References GNUNET_GNSRECORD_PluginFunctions::cls, GNUNET_new, messenger_number_to_typename(), messenger_string_to_value(), messenger_typename_to_number(), messenger_value_to_string(), GNUNET_GNSRECORD_PluginFunctions::number_to_typename, GNUNET_GNSRECORD_PluginFunctions::string_to_value, GNUNET_GNSRECORD_PluginFunctions::typename_to_number, and GNUNET_GNSRECORD_PluginFunctions::value_to_string.

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◆ libgnunet_plugin_gnsrecord_messenger_done()

void * libgnunet_plugin_gnsrecord_messenger_done ( void *  cls)

Exit point from the plugin.

Parameters
clsthe return value from libgnunet_plugin_block_test_init
Returns
NULL

Definition at line 299 of file plugin_gnsrecord_messenger.c.

300{
302
303 GNUNET_free (api);
304 return NULL;
305}

References GNUNET_GNSRECORD_PluginFunctions::cls, and GNUNET_free.

Variable Documentation

◆ name

◆ number

uint32_t number

Definition at line 219 of file plugin_gnsrecord_messenger.c.

◆ 

struct { ... } name_map[]
Initial value:
= {
{ "MESSENGER_ROOM_ENTRY", GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY },
{ "MESSENGER_ROOM_DETAILS", GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_DETAILS },
{ NULL, UINT32_MAX }
}

Mapping of record type numbers to human-readable record type names.

Referenced by messenger_number_to_typename(), and messenger_typename_to_number().