GNUnet  0.19.3
plugin_gnsrecord_conversation.c File Reference

gnsrecord plugin to provide the API for fundamental GNS records This includes the VPN record because GNS resolution is expected to understand VPN records and (if needed) map the result to A/AAAA. More...

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Functions

static char * conversation_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 conversation_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 conversation_typename_to_number (void *cls, const char *gns_typename)
 Convert a type name (e.g. More...
 
static const char * conversation_number_to_typename (void *cls, uint32_t type)
 Convert a type number to the corresponding type string (e.g. More...
 
void * libgnunet_plugin_gnsrecord_conversation_init (void *cls)
 Entry point for the plugin. More...
 
void * libgnunet_plugin_gnsrecord_conversation_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...
 

Detailed Description

gnsrecord plugin to provide the API for fundamental GNS records This includes the VPN record because GNS resolution is expected to understand VPN records and (if needed) map the result to A/AAAA.

Author
Christian Grothoff

Definition in file plugin_gnsrecord_conversation.c.

Function Documentation

◆ conversation_value_to_string()

static char* conversation_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 47 of file plugin_gnsrecord_conversation.c.

51 {
52  char *s;
53 
54  (void) cls;
55  switch (type)
56  {
58  {
59  const struct GNUNET_CONVERSATION_PhoneRecord *pr;
60  char *ret;
61  char *pkey;
62 
63  if (data_size != sizeof(struct GNUNET_CONVERSATION_PhoneRecord))
64  {
65  GNUNET_break_op (0);
66  return NULL;
67  }
68  pr = data;
69  if (1 != ntohl (pr->version))
70  {
72  _ ("PHONE version %u not supported\n"),
73  ntohl (pr->version));
74  return NULL;
75  }
78  sizeof(struct GNUNET_HashCode));
79 
81  "%s-%s",
82  s,
83  pkey);
84  GNUNET_free (s);
85  GNUNET_free (pkey);
86  return ret;
87  }
88 
89  default:
90  return NULL;
91  }
92 }
#define GNUNET_GNSRECORD_TYPE_PHONE
Endpoint for conversation.
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
uint32_t data
The data value.
static char * pkey
Public key of the zone to look in, in ASCII.
#define GNUNET_log(kind,...)
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
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
@ GNUNET_ERROR_TYPE_ERROR
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
#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:763
#define _(String)
GNU gettext support macro.
Definition: platform.h:177
A phone record specifies which peer is hosting a given user and may also specify the phone line that ...
struct GNUNET_HashCode line_port
Phone line (CADET port) to connect to.
struct GNUNET_PeerIdentity peer
Identity of the peer hosting the phone service.
uint32_t version
Version of the phone record, for now always one.
A 512-bit hashcode.
struct GNUNET_CRYPTO_EddsaPublicKey public_key
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model

References _, data, data_size, GNUNET_asprintf(), GNUNET_break_op, GNUNET_CRYPTO_eddsa_public_key_to_string(), GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_GNSRECORD_TYPE_PHONE, GNUNET_log, GNUNET_STRINGS_data_to_string_alloc(), GNUNET_CONVERSATION_PhoneRecord::line_port, GNUNET_CONVERSATION_PhoneRecord::peer, pkey, GNUNET_PeerIdentity::public_key, ret, type, and GNUNET_CONVERSATION_PhoneRecord::version.

Referenced by libgnunet_plugin_gnsrecord_conversation_init().

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◆ conversation_string_to_value()

static int conversation_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 107 of file plugin_gnsrecord_conversation.c.

112 {
113  (void) cls;
114  if (NULL == s)
115  {
116  GNUNET_break (0);
117  return GNUNET_SYSERR;
118  }
119  switch (type)
120  {
122  {
124  char line_port[103];
125  const char *dash;
126  struct GNUNET_PeerIdentity peer;
127 
128  if ((NULL == (dash = strchr (s, '-'))) ||
129  (1 != sscanf (s, "%103s-", line_port)) ||
130  (GNUNET_OK !=
132  strlen (dash + 1),
133  &peer.public_key)))
134  {
136  _ ("Unable to parse PHONE record `%s'\n"),
137  s);
138  return GNUNET_SYSERR;
139  }
141  pr->version = htonl (1);
142  pr->reserved = htonl (0);
143  if (GNUNET_OK !=
145  strlen (line_port),
146  &pr->line_port,
147  sizeof(struct GNUNET_HashCode)))
148  {
150  _ ("Unable to parse PHONE record `%s'\n"),
151  s);
152  GNUNET_free (pr);
153  return GNUNET_SYSERR;
154  }
155  pr->peer = peer;
156  *data = pr;
157  *data_size = sizeof(struct GNUNET_CONVERSATION_PhoneRecord);
158  return GNUNET_OK;
159  }
160 
161  default:
162  return GNUNET_SYSERR;
163  }
164 }
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
@ 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.
#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:788
The identity of the host (wraps the signing key of the peer).
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.

References _, data, data_size, GNUNET_break, GNUNET_CRYPTO_eddsa_public_key_from_string(), GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_GNSRECORD_TYPE_PHONE, GNUNET_log, GNUNET_new, GNUNET_OK, GNUNET_STRINGS_string_to_data(), GNUNET_SYSERR, GNUNET_CONVERSATION_PhoneRecord::line_port, GNUNET_CONVERSATION_PhoneRecord::peer, peer, GNUNET_CONVERSATION_PhoneRecord::reserved, type, and GNUNET_CONVERSATION_PhoneRecord::version.

Referenced by libgnunet_plugin_gnsrecord_conversation_init().

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◆ conversation_typename_to_number()

static uint32_t conversation_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 189 of file plugin_gnsrecord_conversation.c.

191 {
192  unsigned int i;
193 
194  (void) cls;
195  i = 0;
196  while ((name_map[i].name != NULL) &&
197  (0 != strcasecmp (gns_typename, name_map[i].name)))
198  i++;
199  return name_map[i].number;
200 }
const char * name
static struct @7 name_map[]
Mapping of record type numbers to human-readable record type names.

References name, and name_map.

Referenced by libgnunet_plugin_gnsrecord_conversation_init().

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◆ conversation_number_to_typename()

static const char* conversation_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 211 of file plugin_gnsrecord_conversation.c.

213 {
214  unsigned int i;
215 
216  (void) cls;
217  i = 0;
218  while ((name_map[i].name != NULL) &&
219  (type != name_map[i].number))
220  i++;
221  return name_map[i].name;
222 }

References name, name_map, and type.

Referenced by libgnunet_plugin_gnsrecord_conversation_init().

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◆ libgnunet_plugin_gnsrecord_conversation_init()

void* libgnunet_plugin_gnsrecord_conversation_init ( void *  cls)

Entry point for the plugin.

Parameters
clsNULL
Returns
the exported block API

Definition at line 232 of file plugin_gnsrecord_conversation.c.

233 {
235 
236  (void) cls;
242  return api;
243 }
static char * conversation_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 * conversation_number_to_typename(void *cls, uint32_t type)
Convert a type number to the corresponding type string (e.g.
static int conversation_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.
static uint32_t conversation_typename_to_number(void *cls, const char *gns_typename)
Convert a type name (e.g.
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, conversation_number_to_typename(), conversation_string_to_value(), conversation_typename_to_number(), conversation_value_to_string(), GNUNET_new, 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_conversation_done()

void* libgnunet_plugin_gnsrecord_conversation_done ( void *  cls)

Exit point from the plugin.

Parameters
clsthe return value from libgnunet_plugin_block_test_init
Returns
NULL

Definition at line 253 of file plugin_gnsrecord_conversation.c.

254 {
256 
257  GNUNET_free (api);
258  return NULL;
259 }

References GNUNET_GNSRECORD_PluginFunctions::cls, and GNUNET_free.

Variable Documentation

◆ name

const char* name

◆ number

uint32_t number

Definition at line 174 of file plugin_gnsrecord_conversation.c.

◆ 

struct { ... } name_map[]
Initial value:
= {
{ NULL, UINT32_MAX }
}

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

Referenced by conversation_number_to_typename(), and conversation_typename_to_number().