GNUnet  0.11.x
Data Structures | Functions | Variables
gnunet-service-gns.c File Reference

GNU Name System (main service) More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_dns_service.h"
#include "gnunet_dnsparser_lib.h"
#include "gnunet_dht_service.h"
#include "gnunet_namecache_service.h"
#include "gnunet_gnsrecord_lib.h"
#include "gnunet_gns_service.h"
#include "gnunet_statistics_service.h"
#include "gns.h"
#include "gnunet-service-gns_resolver.h"
#include "gnunet-service-gns_interceptor.h"
#include "gnunet_protocols.h"
Include dependency graph for gnunet-service-gns.c:

Go to the source code of this file.

Data Structures

struct  ClientLookupHandle
 Handle to a lookup operation from client via API. More...
 
struct  GnsClient
 Information we track per connected client. More...
 
struct  GNS_TopLevelDomain
 Representation of a TLD, mapping the respective TLD string (i.e. More...
 

Functions

int GNS_find_tld (const char *tld_str, struct GNUNET_CRYPTO_EcdsaPublicKey *pkey)
 Find GNS zone belonging to TLD tld. More...
 
const char * GNS_get_tld (const char *name)
 Obtain the TLD of the given name. More...
 
static void shutdown_task (void *cls)
 Task run during shutdown. More...
 
static void client_disconnect_cb (void *cls, struct GNUNET_SERVICE_Client *client, void *app_ctx)
 Called whenever a client is disconnected. More...
 
static void * client_connect_cb (void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
 Add a client to our list of active clients. More...
 
static void send_lookup_response (void *cls, uint32_t rd_count, const struct GNUNET_GNSRECORD_Data *rd)
 Reply to client with the result from our lookup. More...
 
static int check_lookup (void *cls, const struct LookupMessage *l_msg)
 Checks a GNUNET_MESSAGE_TYPE_GNS_LOOKUP message. More...
 
static void handle_lookup (void *cls, const struct LookupMessage *sh_msg)
 Handle lookup requests from client. More...
 
static void read_service_conf (void *cls, const char *section, const char *option, const char *value)
 Reads the configuration and populates TLDs. More...
 
static void run (void *cls, const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_SERVICE_Handle *service)
 Process GNS requests. More...
 
 GNUNET_SERVICE_MAIN ("gns", GNUNET_SERVICE_OPTION_NONE, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_var_size(lookup, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, struct LookupMessage, NULL), GNUNET_MQ_handler_end())
 Define "main" method using service macro. More...
 

Variables

static struct GNUNET_DHT_Handledht_handle
 Our handle to the DHT. More...
 
static struct GNUNET_NAMECACHE_Handlenamecache_handle
 Our handle to the namecache service. More...
 
static int v6_enabled
 GNUNET_YES if ipv6 is supported More...
 
static int v4_enabled
 GNUNET_YES if ipv4 is supported More...
 
static struct GNUNET_STATISTICS_Handlestatistics
 Handle to the statistics service. More...
 
static struct GNS_TopLevelDomaintld_head
 Head of DLL of TLDs we map to GNS zones. More...
 
static struct GNS_TopLevelDomaintld_tail
 Tail of DLL of TLDs we map to GNS zones. More...
 

Detailed Description

GNU Name System (main service)

Author
Martin Schanzenbach
Christian Grothoff

Definition in file gnunet-service-gns.c.

Function Documentation

◆ GNS_find_tld()

int GNS_find_tld ( const char *  tld_str,
struct GNUNET_CRYPTO_EcdsaPublicKey pkey 
)

Find GNS zone belonging to TLD tld.

Parameters
tld_strtop-level domain to look up
[out]pkeypublic key to set
Returns
GNUNET_YES if tld was found GNUNET_NO if not

Definition at line 179 of file gnunet-service-gns.c.

References GNUNET_GNSRECORD_zkey_to_pkey(), GNUNET_NO, GNUNET_OK, GNUNET_YES, and GNS_TopLevelDomain::tld.

Referenced by handle_dns_request().

181 {
182  if ('\0' == *tld_str)
183  return GNUNET_NO;
184  for (struct GNS_TopLevelDomain *tld = tld_head;
185  NULL != tld;
186  tld = tld->next)
187  {
188  if (0 == strcasecmp (tld_str,
189  tld->tld))
190  {
191  *pkey = tld->pkey;
192  return GNUNET_YES;
193  }
194  }
195  if (GNUNET_OK ==
196  GNUNET_GNSRECORD_zkey_to_pkey (tld_str + 1,
197  pkey))
198  return GNUNET_YES; /* TLD string *was* the public key */
199  return GNUNET_NO;
200 }
struct GNS_TopLevelDomain * next
Kept in a DLL, as there are unlikely enough of these to warrant a hash map.
static struct GNS_TopLevelDomain * tld_head
Head of DLL of TLDs we map to GNS zones.
int GNUNET_GNSRECORD_zkey_to_pkey(const char *zkey, struct GNUNET_CRYPTO_EcdsaPublicKey *pkey)
Convert an absolute domain name to the respective public key.
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
Representation of a TLD, mapping the respective TLD string (i.e.
#define GNUNET_YES
Definition: gnunet_common.h:77
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◆ GNS_get_tld()

const char* GNS_get_tld ( const char *  name)

Obtain the TLD of the given name.

Parameters
namea name
Returns
the part of name after the last ".", or name if name does not contain a "."

Definition at line 211 of file gnunet-service-gns.c.

References name, and GNS_TopLevelDomain::tld.

Referenced by handle_dns_request(), and recursive_gns2dns_resolution().

212 {
213  const char *tld;
214 
215  tld = strrchr (name,
216  (unsigned char) '.');
217  if (NULL == tld)
218  tld = name;
219  else
220  tld++; /* skip the '.' */
221  return tld;
222 }
const char * name
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◆ shutdown_task()

static void shutdown_task ( void *  cls)
static

Task run during shutdown.

Parameters
clsunused, NULL

Definition at line 231 of file gnunet-service-gns.c.

References GNS_interceptor_done(), GNS_resolver_done(), GNUNET_CONTAINER_DLL_remove, GNUNET_DHT_disconnect(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, GNUNET_NAMECACHE_disconnect(), GNUNET_NO, GNUNET_STATISTICS_destroy(), and GNS_TopLevelDomain::tld.

Referenced by run().

232 {
233  struct GNS_TopLevelDomain *tld;
234 
235  (void) cls;
237  "Shutting down!\n");
240  if (NULL != statistics)
241  {
243  GNUNET_NO);
244  statistics = NULL;
245  }
246  if (NULL != namecache_handle)
247  {
249  namecache_handle = NULL;
250  }
251  if (NULL != dht_handle)
252  {
254  dht_handle = NULL;
255  }
256  while (NULL != (tld = tld_head))
257  {
259  tld_tail,
260  tld);
261  GNUNET_free (tld->tld);
262  GNUNET_free (tld);
263  }
264 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
static struct GNS_TopLevelDomain * tld_head
Head of DLL of TLDs we map to GNS zones.
#define GNUNET_NO
Definition: gnunet_common.h:78
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).
static struct GNUNET_STATISTICS_Handle * statistics
Handle to the statistics service.
static struct GNUNET_DHT_Handle * dht_handle
Our handle to the DHT.
static struct GNUNET_NAMECACHE_Handle * namecache_handle
Our handle to the namecache service.
static struct GNS_TopLevelDomain * tld_tail
Tail of DLL of TLDs we map to GNS zones.
void GNS_interceptor_done()
Disconnect from interceptor.
void GNS_resolver_done()
Shutdown resolver.
void GNUNET_DHT_disconnect(struct GNUNET_DHT_Handle *handle)
Shutdown connection with the DHT service.
Definition: dht_api.c:918
Representation of a TLD, mapping the respective TLD string (i.e.
#define GNUNET_log(kind,...)
char * tld
Top-level domain as a string, including leading ".".
void GNUNET_NAMECACHE_disconnect(struct GNUNET_NAMECACHE_Handle *h)
Disconnect from the namecache service (and free associated resources).
#define GNUNET_free(ptr)
Wrapper around free.
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◆ client_disconnect_cb()

static void client_disconnect_cb ( void *  cls,
struct GNUNET_SERVICE_Client client,
void *  app_ctx 
)
static

Called whenever a client is disconnected.

Parameters
clsclosure
clientidentification of the client
app_ctxclient

Definition at line 275 of file gnunet-service-gns.c.

References GnsClient::clh_head, GnsClient::clh_tail, ClientLookupHandle::gc, GNS_resolver_lookup_cancel(), GNUNET_CONTAINER_DLL_remove, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, and ClientLookupHandle::lookup.

Referenced by run().

278 {
279  struct ClientLookupHandle *clh;
280  struct GnsClient *gc = app_ctx;
281 
282  (void) cls;
284  "Client %p disconnected\n",
285  client);
286  while (NULL != (clh = gc->clh_head))
287  {
288  if (NULL != clh->lookup)
291  gc->clh_tail,
292  clh);
293  GNUNET_free (clh);
294  }
295  GNUNET_free (gc);
296 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
void GNS_resolver_lookup_cancel(struct GNS_ResolverHandle *rh)
Cancel active resolution (i.e.
struct GNS_ResolverHandle * lookup
Active handle for the lookup.
Handle to a lookup operation from client via API.
Information we track per connected client.
struct ClientLookupHandle * clh_head
Head of the DLL.
#define GNUNET_log(kind,...)
struct ClientLookupHandle * clh_tail
Tail of the DLL.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ client_connect_cb()

static void* client_connect_cb ( void *  cls,
struct GNUNET_SERVICE_Client client,
struct GNUNET_MQ_Handle mq 
)
static

Add a client to our list of active clients.

Parameters
clsNULL
clientclient to add
mqmessage queue for client
Returns
internal namestore client structure for this client

Definition at line 308 of file gnunet-service-gns.c.

References GnsClient::client, ClientLookupHandle::gc, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_new, mq, and GnsClient::mq.

Referenced by run().

311 {
312  struct GnsClient *gc;
313 
314  (void) cls;
316  "Client %p connected\n",
317  client);
318  gc = GNUNET_new (struct GnsClient);
319  gc->client = client;
320  gc->mq = mq;
321  return gc;
322 }
#define GNUNET_new(type)
Allocate a struct or union of the given type.
struct GNUNET_MQ_Handle * mq
The MQ.
struct GNUNET_SERVICE_Client * client
The client.
Information we track per connected client.
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
#define GNUNET_log(kind,...)
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◆ send_lookup_response()

static void send_lookup_response ( void *  cls,
uint32_t  rd_count,
const struct GNUNET_GNSRECORD_Data rd 
)
static

Reply to client with the result from our lookup.

Parameters
clsthe closure (our client lookup handle)
rd_countthe number of records in rd
rdthe record data

Definition at line 333 of file gnunet-service-gns.c.

References GnsClient::clh_head, GnsClient::clh_tail, GnsClient::client, env, ClientLookupHandle::gc, GNUNET_assert, GNUNET_break, GNUNET_CONTAINER_DLL_remove, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_GNSRECORD_records_get_size(), GNUNET_GNSRECORD_records_serialize(), GNUNET_log, GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_NO, GNUNET_SERVICE_client_drop(), GNUNET_SERVICE_client_get_mq(), GNUNET_STATISTICS_update(), LookupResultMessage::id, len, LookupResultMessage::rd_count, and ClientLookupHandle::request_id.

Referenced by handle_lookup().

336 {
337  struct ClientLookupHandle *clh = cls;
338  struct GnsClient *gc = clh->gc;
339  struct GNUNET_MQ_Envelope *env;
340  struct LookupResultMessage *rmsg;
341  ssize_t len;
342 
344  "Sending LOOKUP_RESULT message with %u results\n",
345  (unsigned int) rd_count);
347  rd);
348  if (len < 0)
349  {
350  GNUNET_break (0);
352  return;
353  }
354  if (len > UINT16_MAX - sizeof(*rmsg))
355  {
356  GNUNET_break (0);
358  return;
359  }
360  env = GNUNET_MQ_msg_extra (rmsg,
361  len,
363  rmsg->id = clh->request_id;
364  rmsg->rd_count = htonl (rd_count);
365  GNUNET_assert (len ==
367  rd,
368  len,
369  (char*) &rmsg[1]));
371  env);
373  gc->clh_tail,
374  clh);
375  GNUNET_free (clh);
377  "Completed lookups", 1,
378  GNUNET_NO);
380  "Records resolved",
381  rd_count,
382  GNUNET_NO);
383 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
Message from GNS service to client: new results.
Definition: gns.h:76
GNUNET_NETWORK_STRUCT_END ssize_t GNUNET_GNSRECORD_records_get_size(unsigned int rd_count, const struct GNUNET_GNSRECORD_Data *rd)
Calculate how many bytes we will need to serialize the given records.
uint32_t rd_count
The number of records contained in response.
Definition: gns.h:91
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2437
ssize_t GNUNET_GNSRECORD_records_serialize(unsigned int rd_count, const struct GNUNET_GNSRECORD_Data *rd, size_t dest_size, char *dest)
Serialize the given records to the given destination buffer.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT
Service response to name resolution request from client.
#define GNUNET_NO
Definition: gnunet_common.h:78
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
static struct GNUNET_STATISTICS_Handle * statistics
Handle to the statistics service.
struct GNUNET_SERVICE_Client * client
The client.
uint32_t request_id
request id
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct...
Definition: gnunet_mq_lib.h:52
uint32_t id
Unique identifier for this request (for key collisions).
Definition: gns.h:86
struct GnsClient * gc
Client handle.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2324
Handle to a lookup operation from client via API.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
Information we track per connected client.
struct ClientLookupHandle * clh_head
Head of the DLL.
#define GNUNET_log(kind,...)
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:353
struct ClientLookupHandle * clh_tail
Tail of the DLL.
#define GNUNET_free(ptr)
Wrapper around free.
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
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◆ check_lookup()

static int check_lookup ( void *  cls,
const struct LookupMessage l_msg 
)
static

Checks a GNUNET_MESSAGE_TYPE_GNS_LOOKUP message.

Parameters
clsclient sending the message
l_msgmessage of type struct LookupMessage
Returns
GNUNET_OK if l_msg is well-formed

Definition at line 394 of file gnunet-service-gns.c.

References GNUNET_break, GNUNET_DNSPARSER_MAX_NAME_LENGTH, GNUNET_MQ_check_zero_termination, GNUNET_OK, GNUNET_SYSERR, LookupMessage::header, and GNUNET_MessageHeader::size.

396 {
397  size_t nlen;
398 
399  (void) cls;
401  nlen = ntohs (l_msg->header.size) - sizeof(struct LookupMessage);
403  {
404  GNUNET_break (0);
405  return GNUNET_SYSERR;
406  }
407  return GNUNET_OK;
408 }
Message from client to GNS service to lookup records.
Definition: gns.h:36
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
struct GNUNET_MessageHeader header
Header of type GNUNET_MESSAGE_TYPE_GNS_LOOKUP.
Definition: gns.h:41
#define GNUNET_DNSPARSER_MAX_NAME_LENGTH
Maximum length of a name in DNS.
#define GNUNET_MQ_check_zero_termination(m)
Insert code for a "check_" function that verifies that a given variable-length message received over ...
#define GNUNET_SYSERR
Definition: gnunet_common.h:76

◆ handle_lookup()

static void handle_lookup ( void *  cls,
const struct LookupMessage sh_msg 
)
static

Handle lookup requests from client.

Parameters
clsthe closure
clientthe client
messagethe message

Definition at line 419 of file gnunet-service-gns.c.

References GnsClient::clh_head, GnsClient::clh_tail, GnsClient::client, ClientLookupHandle::gc, GNS_resolver_lookup(), GNUNET_CONTAINER_DLL_insert, GNUNET_DNSPARSER_MAX_NAME_LENGTH, GNUNET_DNSPARSER_TYPE_A, GNUNET_DNSPARSER_TYPE_AAAA, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_new, GNUNET_NO, GNUNET_OK, GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_update(), GNUNET_STRINGS_utf8_tolower(), LookupMessage::id, ClientLookupHandle::lookup, name, LookupMessage::options, ClientLookupHandle::request_id, send_lookup_response(), LookupMessage::type, v4_enabled, v6_enabled, and LookupMessage::zone.

421 {
422  struct GnsClient *gc = cls;
424  struct ClientLookupHandle *clh;
425  char *nameptr = name;
426  const char *utf_in;
427 
429  utf_in = (const char *) &sh_msg[1];
431  nameptr);
433  "Received LOOKUP `%s' message\n",
434  name);
435  clh = GNUNET_new (struct ClientLookupHandle);
437  gc->clh_tail,
438  clh);
439  clh->gc = gc;
440  clh->request_id = sh_msg->id;
441  if ((GNUNET_DNSPARSER_TYPE_A == ntohl (sh_msg->type)) &&
442  (GNUNET_OK != v4_enabled))
443  {
445  "LOOKUP: Query for A record but AF_INET not supported!");
447  0,
448  NULL);
449  return;
450  }
451  if ((GNUNET_DNSPARSER_TYPE_AAAA == ntohl (sh_msg->type)) &&
452  (GNUNET_OK != v6_enabled))
453  {
455  "LOOKUP: Query for AAAA record but AF_INET6 not supported!");
457  0,
458  NULL);
459  return;
460  }
461  clh->lookup = GNS_resolver_lookup (&sh_msg->zone,
462  ntohl (sh_msg->type),
463  name,
464  (enum GNUNET_GNS_LocalOptions) ntohs (
465  sh_msg->options),
466  &send_lookup_response, clh);
468  "Lookup attempts",
469  1, GNUNET_NO);
470 }
uint32_t id
Unique identifier for this request (for key collisions).
Definition: gns.h:46
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
struct GNUNET_CRYPTO_EcdsaPublicKey zone
Zone that is to be used for lookup.
Definition: gns.h:51
GNUNET_GNS_LocalOptions
Options for the GNS lookup.
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
int32_t type
the type of record to look up
Definition: gns.h:67
#define GNUNET_new(type)
Allocate a struct or union of the given type.
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
static int v6_enabled
GNUNET_YES if ipv6 is supported
static struct GNUNET_STATISTICS_Handle * statistics
Handle to the statistics service.
struct GNUNET_SERVICE_Client * client
The client.
uint32_t request_id
request id
#define GNUNET_DNSPARSER_MAX_NAME_LENGTH
Maximum length of a name in DNS.
struct GnsClient * gc
Client handle.
static int v4_enabled
GNUNET_YES if ipv4 is supported
struct GNS_ResolverHandle * lookup
Active handle for the lookup.
Handle to a lookup operation from client via API.
int16_t options
Local options for where to look for results (an enum GNUNET_GNS_LocalOptions in NBO).
Definition: gns.h:57
struct GNS_ResolverHandle * GNS_resolver_lookup(const struct GNUNET_CRYPTO_EcdsaPublicKey *zone, uint32_t record_type, const char *name, enum GNUNET_GNS_LocalOptions options, GNS_ResultProcessor proc, void *proc_cls)
Lookup of a record in a specific zone calls lookup result processor on result.
Information we track per connected client.
#define GNUNET_DNSPARSER_TYPE_AAAA
const char * name
struct ClientLookupHandle * clh_head
Head of the DLL.
#define GNUNET_log(kind,...)
static void send_lookup_response(void *cls, uint32_t rd_count, const struct GNUNET_GNSRECORD_Data *rd)
Reply to client with the result from our lookup.
#define GNUNET_DNSPARSER_TYPE_A
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2243
struct ClientLookupHandle * clh_tail
Tail of the DLL.
void GNUNET_STRINGS_utf8_tolower(const char *input, char *output)
Convert the utf-8 input string to lower case.
Definition: strings.c:553
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◆ read_service_conf()

static void read_service_conf ( void *  cls,
const char *  section,
const char *  option,
const char *  value 
)
static

Reads the configuration and populates TLDs.

Parameters
clsunused
sectionname of section in config, always "gns"
optionname of the option, TLDs start with "."
valuevalue for the option, public key for TLDs

Definition at line 482 of file gnunet-service-gns.c.

References _, GNUNET_CONTAINER_DLL_insert, GNUNET_ERROR_TYPE_ERROR, GNUNET_log_config_invalid(), GNUNET_new, GNUNET_OK, GNUNET_strdup, GNUNET_STRINGS_string_to_data(), pk, GNS_TopLevelDomain::pkey, and GNS_TopLevelDomain::tld.

Referenced by run().

486 {
488  struct GNS_TopLevelDomain *tld;
489 
490  (void) cls;
491  (void) section;
492  if (option[0] != '.')
493  return;
494  if (GNUNET_OK !=
496  strlen (value),
497  &pk,
498  sizeof(pk)))
499  {
501  section,
502  option,
503  _ (
504  "Properly base32-encoded public key required"));
505  return;
506  }
507  tld = GNUNET_new (struct GNS_TopLevelDomain);
508  tld->tld = GNUNET_strdup (&option[1]);
509  tld->pkey = pk;
511  tld_tail,
512  tld);
513 }
static struct GNUNET_CRYPTO_EddsaPrivateKey * pk
Private key of this peer.
static struct GNS_TopLevelDomain * tld_head
Head of DLL of TLDs we map to GNS zones.
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
struct GNUNET_CRYPTO_EcdsaPublicKey pkey
Public key associated with the tld.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_new(type)
Allocate a struct or union of the given type.
void GNUNET_log_config_invalid(enum GNUNET_ErrorType kind, const char *section, const char *option, const char *required)
Log error message about invalid configuration option value.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
#define _(String)
GNU gettext support macro.
Definition: platform.h:181
static char * section
Name of the section.
Definition: gnunet-config.c:33
static char * value
Value of the record to add/remove.
static struct GNS_TopLevelDomain * tld_tail
Tail of DLL of TLDs we map to GNS zones.
static char * option
Name of the option.
Definition: gnunet-config.c:38
Representation of a TLD, mapping the respective TLD string (i.e.
Public ECC key (always for Curve25519) encoded in a format suitable for network transmission and ECDS...
char * tld
Top-level domain as a string, including leading ".".
int 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:952
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◆ run()

static void run ( void *  cls,
const struct GNUNET_CONFIGURATION_Handle c,
struct GNUNET_SERVICE_Handle service 
)
static

Process GNS requests.

Parameters
clsclosure
serverthe initialized server
cconfiguration to use

Definition at line 524 of file gnunet-service-gns.c.

References _, client_connect_cb(), client_disconnect_cb(), GNS_interceptor_init(), GNS_resolver_init(), GNUNET_break, GNUNET_CONFIGURATION_get_value_number(), GNUNET_CONFIGURATION_get_value_yesno(), GNUNET_CONFIGURATION_iterate_section_values(), GNUNET_DHT_connect(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_log, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, GNUNET_MQ_handler_end, GNUNET_MQ_hd_var_size, GNUNET_NAMECACHE_connect(), GNUNET_NETWORK_test_pf(), GNUNET_OK, GNUNET_SCHEDULER_add_now(), GNUNET_SCHEDULER_add_shutdown(), GNUNET_SCHEDULER_shutdown(), GNUNET_SERVICE_MAIN(), GNUNET_SERVICE_OPTION_NONE, GNUNET_STATISTICS_create(), GNUNET_SYSERR, GNUNET_YES, ClientLookupHandle::lookup, read_service_conf(), shutdown_task(), v4_enabled, and v6_enabled.

527 {
528  unsigned long long max_parallel_bg_queries = 16;
529 
531  "gns",
533  NULL);
534  v6_enabled = GNUNET_NETWORK_test_pf (PF_INET6);
537  if (NULL == namecache_handle)
538  {
540  _ ("Failed to connect to the namecache!\n"));
542  return;
543  }
544  if (GNUNET_OK ==
546  "gns",
547  "MAX_PARALLEL_BACKGROUND_QUERIES",
548  &max_parallel_bg_queries))
549  {
551  "Number of allowed parallel background queries: %llu\n",
552  max_parallel_bg_queries);
553  }
555  (unsigned int) max_parallel_bg_queries);
556  if (NULL == dht_handle)
557  {
559  _ ("Could not connect to DHT!\n"));
561  NULL);
562  return;
563  }
565  dht_handle,
566  c,
567  max_parallel_bg_queries);
568  if ((GNUNET_YES ==
570  "gns",
571  "INTERCEPT_DNS")) &&
572  (GNUNET_SYSERR ==
574  {
575  GNUNET_break (0);
577  NULL);
578  return;
579  }
581  c);
583  NULL);
584 }
struct GNUNET_NAMECACHE_Handle * GNUNET_NAMECACHE_connect(const struct GNUNET_CONFIGURATION_Handle *cfg)
Connect to the namecache service.
int GNUNET_CONFIGURATION_get_value_number(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, unsigned long long *number)
Get a configuration value that should be a number.
void GNUNET_CONFIGURATION_iterate_section_values(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, GNUNET_CONFIGURATION_Iterator iter, void *iter_cls)
Iterate over values of a section in the configuration.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_shutdown(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received, or when GNUNET_SCHEDULER_shutdown() is being invoked.
Definition: scheduler.c:1300
struct GNUNET_STATISTICS_Handle * GNUNET_STATISTICS_create(const char *subsystem, const struct GNUNET_CONFIGURATION_Handle *cfg)
Get handle for the statistics service.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:526
static int v6_enabled
GNUNET_YES if ipv6 is supported
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
int GNS_interceptor_init(const struct GNUNET_CONFIGURATION_Handle *c)
Initialized the interceptor.
#define _(String)
GNU gettext support macro.
Definition: platform.h:181
static struct GNUNET_STATISTICS_Handle * statistics
Handle to the statistics service.
static void shutdown_task(void *cls)
Task run during shutdown.
static struct GNUNET_DHT_Handle * dht_handle
Our handle to the DHT.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_now(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run as soon as possible.
Definition: scheduler.c:1280
static struct GNUNET_NAMECACHE_Handle * namecache_handle
Our handle to the namecache service.
static int v4_enabled
GNUNET_YES if ipv4 is supported
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
struct GNUNET_DHT_Handle * GNUNET_DHT_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, unsigned int ht_len)
Initialize the connection with the DHT service.
Definition: dht_api.c:890
void GNS_resolver_init(struct GNUNET_NAMECACHE_Handle *nc, struct GNUNET_DHT_Handle *dht, const struct GNUNET_CONFIGURATION_Handle *c, unsigned long long max_bg_queries)
Initialize the resolver.
static void read_service_conf(void *cls, const char *section, const char *option, const char *value)
Reads the configuration and populates TLDs.
#define GNUNET_log(kind,...)
#define GNUNET_YES
Definition: gnunet_common.h:77
int GNUNET_CONFIGURATION_get_value_yesno(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option)
Get a configuration value that should be in a set of "YES" or "NO".
int GNUNET_NETWORK_test_pf(int pf)
Test if the given protocol family is supported by this system.
Definition: network.c:85
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◆ GNUNET_SERVICE_MAIN()

GNUNET_SERVICE_MAIN ( "gns"  ,
GNUNET_SERVICE_OPTION_NONE  ,
run,
client_connect_cb,
client_disconnect_cb,
NULL  ,
GNUNET_MQ_hd_var_size(lookup, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, struct LookupMessage, NULL)  ,
GNUNET_MQ_handler_end()   
)

Define "main" method using service macro.

Referenced by run().

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Variable Documentation

◆ dht_handle

struct GNUNET_DHT_Handle* dht_handle
static

Our handle to the DHT.

Definition at line 138 of file gnunet-service-gns.c.

◆ namecache_handle

struct GNUNET_NAMECACHE_Handle* namecache_handle
static

Our handle to the namecache service.

Definition at line 143 of file gnunet-service-gns.c.

◆ v6_enabled

int v6_enabled
static

GNUNET_YES if ipv6 is supported

Definition at line 148 of file gnunet-service-gns.c.

Referenced by handle_lookup(), and run().

◆ v4_enabled

int v4_enabled
static

GNUNET_YES if ipv4 is supported

Definition at line 153 of file gnunet-service-gns.c.

Referenced by handle_lookup(), and run().

◆ statistics

struct GNUNET_STATISTICS_Handle* statistics
static

Handle to the statistics service.

Definition at line 158 of file gnunet-service-gns.c.

◆ tld_head

struct GNS_TopLevelDomain* tld_head
static

Head of DLL of TLDs we map to GNS zones.

Definition at line 163 of file gnunet-service-gns.c.

◆ tld_tail

struct GNS_TopLevelDomain* tld_tail
static

Tail of DLL of TLDs we map to GNS zones.

Definition at line 168 of file gnunet-service-gns.c.