GNUnet  0.10.x
Data Structures | Macros | Functions | Variables
gnunet-service-namecache.c File Reference

namecache for the GNUnet naming system More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_dnsparser_lib.h"
#include "gnunet_statistics_service.h"
#include "gnunet_namecache_service.h"
#include "gnunet_namecache_plugin.h"
#include "gnunet_signatures.h"
#include "namecache.h"
Include dependency graph for gnunet-service-namecache.c:

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Data Structures

struct  NamecacheClient
 A namecache client. More...
 
struct  LookupBlockContext
 Context for name lookups passed from handle_lookup_block to handle_lookup_block_it as closure. More...
 

Macros

#define LOG_STRERROR_FILE(kind, syscall, filename)   GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
 

Functions

static void cleanup_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 handle_lookup_block_it (void *cls, const struct GNUNET_GNSRECORD_Block *block)
 A GNUNET_NAMECACHE_BlockCallback for name lookups in handle_lookup_block. More...
 
static void handle_lookup_block (void *cls, const struct LookupBlockMessage *ln_msg)
 Handles a GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK message. More...
 
static int check_block_cache (void *cls, const struct BlockCacheMessage *rp_msg)
 Check a GNUNET_MESSAGE_TYPE_NAMECACHE_BLOCK_CACHE message. More...
 
static void handle_block_cache (void *cls, const struct BlockCacheMessage *rp_msg)
 Handles a GNUNET_MESSAGE_TYPE_NAMECACHE_BLOCK_CACHE message. More...
 
static void run (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg, struct GNUNET_SERVICE_Handle *service)
 Process namecache requests. More...
 
 GNUNET_SERVICE_MAIN ("namecache", GNUNET_SERVICE_OPTION_NONE, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_fixed_size(lookup_block, GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK, struct LookupBlockMessage, NULL), GNUNET_MQ_hd_var_size(block_cache, GNUNET_MESSAGE_TYPE_NAMECACHE_BLOCK_CACHE, struct BlockCacheMessage, NULL), GNUNET_MQ_handler_end())
 Define "main" method using service macro. More...
 

Variables

static const struct GNUNET_CONFIGURATION_HandleGSN_cfg
 Configuration handle. More...
 
static struct GNUNET_STATISTICS_Handlestatistics
 Handle to the statistics service. More...
 
static struct GNUNET_NAMECACHE_PluginFunctionsGSN_database
 Database handle. More...
 
static char * db_lib_name
 Name of the database plugin. More...
 

Detailed Description

namecache for the GNUnet naming system

Author
Matthias Wachs
Christian Grothoff

Definition in file gnunet-service-namecache.c.

Macro Definition Documentation

◆ LOG_STRERROR_FILE

#define LOG_STRERROR_FILE (   kind,
  syscall,
  filename 
)    GNUNET_log_from_strerror_file (kind, "util", syscall, filename)

Definition at line 36 of file gnunet-service-namecache.c.

Function Documentation

◆ cleanup_task()

static void cleanup_task ( void *  cls)
static

Task run during shutdown.

Parameters
clsunused

Definition at line 85 of file gnunet-service-namecache.c.

References db_lib_name, GNUNET_break, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, GNUNET_NO, GNUNET_PLUGIN_unload(), and GNUNET_STATISTICS_destroy().

Referenced by run().

86 {
88  "Stopping namecache service\n");
89  GNUNET_break (NULL ==
91  GSN_database));
93  db_lib_name = NULL;
94  if (NULL != statistics)
95  {
97  GNUNET_NO);
98  statistics = NULL;
99  }
100 }
#define GNUNET_NO
Definition: gnunet_common.h:81
static char * db_lib_name
Name of the database plugin.
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
void * GNUNET_PLUGIN_unload(const char *library_name, void *arg)
Unload plugin (runs the "done" callback and returns whatever "done" returned).
Definition: plugin.c:258
static struct GNUNET_STATISTICS_Handle * statistics
Handle to the statistics service.
static struct GNUNET_NAMECACHE_PluginFunctions * GSN_database
Database handle.
#define GNUNET_log(kind,...)
#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.

Frees our resources associated with that client.

Parameters
clsclosure
clientidentification of the client
app_ctxthe struct NamecacheClient for this client

Definition at line 112 of file gnunet-service-namecache.c.

References GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, and nc.

Referenced by run().

115 {
116  struct NamecacheClient *nc = app_ctx;
117 
119  "Client %p disconnected\n",
120  client);
121  GNUNET_free (nc);
122 }
A namecache client.
static struct GNUNET_PEERINFO_NotifyContext * nc
Iterator context.
#define GNUNET_log(kind,...)
#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
mqqueue to talk to client
Returns
internal namecache client structure for this client

Definition at line 134 of file gnunet-service-namecache.c.

References NamecacheClient::client, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_new, NamecacheClient::mq, and nc.

Referenced by run().

137 {
138  struct NamecacheClient *nc;
139 
141  "Client %p connected\n",
142  client);
143  nc = GNUNET_new (struct NamecacheClient);
144  nc->client = client;
145  nc->mq = mq;
146  return nc;
147 }
struct GNUNET_MQ_Handle * mq
The message queue to talk to client.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
struct GNUNET_SERVICE_Client * client
The client.
A namecache client.
static struct GNUNET_PEERINFO_NotifyContext * nc
Iterator context.
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
#define GNUNET_log(kind,...)
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◆ handle_lookup_block_it()

static void handle_lookup_block_it ( void *  cls,
const struct GNUNET_GNSRECORD_Block block 
)
static

A GNUNET_NAMECACHE_BlockCallback for name lookups in handle_lookup_block.

Parameters
clsa struct LookupNameContext * with information about the request
blockthe block

Definition at line 180 of file gnunet-service-namecache.c.

References bsize, LookupBlockResponseMessage::derived_key, GNUNET_GNSRECORD_Block::derived_key, env, GNUNET_GNSRECORD_Block::expiration_time, LookupBlockResponseMessage::expire, LookupBlockResponseMessage::gns_header, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_WARNING, GNUNET_log, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK_RESPONSE, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_NO, GNUNET_STATISTICS_update(), GNUNET_STRINGS_absolute_time_to_string(), GNUNET_SYSERR, GNUNET_TIME_absolute_ntoh(), NamecacheClient::mq, LookupBlockContext::nc, GNUNET_GNSRECORD_Block::purpose, GNUNET_NAMECACHE_Header::r_id, LookupBlockContext::request_id, LookupBlockResponseMessage::signature, GNUNET_GNSRECORD_Block::signature, GNUNET_CRYPTO_EccSignaturePurpose::size, and LookupBlockContext::status.

Referenced by handle_lookup_block().

182 {
183  struct LookupBlockContext *lnc = cls;
184  struct GNUNET_MQ_Envelope *env;
185  struct LookupBlockResponseMessage *r;
186  size_t esize;
187  size_t bsize;
188 
189  bsize = ntohl (block->purpose.size);
190  if (bsize <
191  (sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) + sizeof (struct GNUNET_TIME_AbsoluteNBO)))
192  {
194  "Malformed block.");
195  lnc->status = GNUNET_SYSERR;
196  return;
197  }
198  esize = ntohl (block->purpose.size)
199  - sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose)
200  - sizeof (struct GNUNET_TIME_AbsoluteNBO);
201  env = GNUNET_MQ_msg_extra (r,
202  esize,
204  r->gns_header.r_id = htonl (lnc->request_id);
205  r->expire = block->expiration_time;
206  r->signature = block->signature;
207  r->derived_key = block->derived_key;
208  GNUNET_memcpy (&r[1],
209  &block[1],
210  esize);
212  "blocks found in cache",
213  1,
214  GNUNET_NO);
216  "Sending NAMECACHE_LOOKUP_BLOCK_RESPONSE message with expiration time %s\n",
218  GNUNET_MQ_send (lnc->nc->mq,
219  env);
220 }
#define GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK_RESPONSE
Service to client: result of block lookup.
struct GNUNET_TIME_AbsoluteNBO expiration_time
Expiration time of the block.
struct GNUNET_CRYPTO_EcdsaSignature signature
Signature.
Definition: namecache.h:91
Lookup response.
Definition: namecache.h:76
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:670
struct GNUNET_MQ_Handle * mq
The message queue to talk to client.
Context for name lookups passed from handle_lookup_block to handle_lookup_block_it as closure...
#define GNUNET_NO
Definition: gnunet_common.h:81
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
Time for absolute time used by GNUnet, in microseconds and in network byte order. ...
uint32_t request_id
Operation id for the name lookup.
header of what an ECC signature signs this must be followed by "size - 8" bytes of the actual signed ...
#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
#define GNUNET_memcpy(dst, src, n)
static struct GNUNET_STATISTICS_Handle * statistics
Handle to the statistics service.
uint32_t size
How many bytes does this signature sign? (including this purpose header); in network byte order (!)...
static unsigned int bsize
struct GNUNET_NAMECACHE_Header gns_header
Type will be GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK_RESPONSE.
Definition: namecache.h:81
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
struct GNUNET_CRYPTO_EcdsaSignature signature
Signature of the block.
struct GNUNET_CRYPTO_EcdsaPublicKey derived_key
Derived public key.
Definition: namecache.h:96
uint32_t r_id
Request ID in NBO.
Definition: namecache.h:51
#define GNUNET_log(kind,...)
struct GNUNET_TIME_AbsoluteNBO expire
Expiration time.
Definition: namecache.h:86
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
const char * GNUNET_STRINGS_absolute_time_to_string(struct GNUNET_TIME_Absolute t)
Like asctime, except for GNUnet time.
Definition: strings.c:792
struct GNUNET_CRYPTO_EccSignaturePurpose purpose
Number of bytes signed; also specifies the number of bytes of encrypted data that follow...
struct NamecacheClient * nc
The client to send the response to.
struct GNUNET_CRYPTO_EcdsaPublicKey derived_key
Derived key used for signing; hash of this is the query.
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◆ handle_lookup_block()

static void handle_lookup_block ( void *  cls,
const struct LookupBlockMessage ln_msg 
)
static

Handles a GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK message.

Parameters
clsa struct NamecacheClient *
theinbound message

Definition at line 230 of file gnunet-service-namecache.c.

References NamecacheClient::client, GNUNET_NAMECACHE_PluginFunctions::cls, env, LookupBlockMessage::gns_header, LookupBlockResponseMessage::gns_header, GNUNET_break, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK_RESPONSE, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_NO, GNUNET_OK, GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GNUNET_STATISTICS_update(), GNUNET_SYSERR, handle_lookup_block_it(), GNUNET_NAMECACHE_PluginFunctions::lookup_block, NamecacheClient::mq, nc, LookupBlockContext::nc, LookupBlockMessage::query, GNUNET_NAMECACHE_Header::r_id, LookupBlockContext::request_id, ret, and LookupBlockContext::status.

232 {
233  struct NamecacheClient *nc = cls;
234  struct GNUNET_MQ_Envelope *env;
235  struct LookupBlockContext lnc;
236  struct LookupBlockResponseMessage *zir_end;
237  int ret;
238 
240  "Received NAMECACHE_LOOKUP_BLOCK message\n");
242  "blocks looked up",
243  1,
244  GNUNET_NO);
245  lnc.request_id = ntohl (ln_msg->gns_header.r_id);
246  lnc.nc = nc;
247  lnc.status = GNUNET_OK;
248  if (GNUNET_SYSERR ==
250  &ln_msg->query,
252  &lnc)))
253  {
254  /* internal error (in database plugin); might be best to just hang up on
255  plugin rather than to signal that there are 'no' results, which
256  might also be false... */
257  GNUNET_break (0);
259  return;
260  }
261  if ((0 == ret) || (GNUNET_SYSERR == lnc.status))
262  {
263  /* no records match at all, generate empty response */
265  "Sending empty NAMECACHE_LOOKUP_BLOCK_RESPONSE message\n");
266  env = GNUNET_MQ_msg (zir_end,
268  zir_end->gns_header.r_id = ln_msg->gns_header.r_id;
269  GNUNET_MQ_send (nc->mq,
270  env);
271  }
273 }
#define GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK_RESPONSE
Service to client: result of block lookup.
void * cls
Closure to pass to all plugin functions.
Lookup response.
Definition: namecache.h:76
struct GNUNET_MQ_Handle * mq
The message queue to talk to client.
Context for name lookups passed from handle_lookup_block to handle_lookup_block_it as closure...
struct GNUNET_NAMECACHE_Header gns_header
Type will be GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK.
Definition: namecache.h:63
static void handle_lookup_block_it(void *cls, const struct GNUNET_GNSRECORD_Block *block)
A GNUNET_NAMECACHE_BlockCallback for name lookups in handle_lookup_block.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
#define GNUNET_NO
Definition: gnunet_common.h:81
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
struct GNUNET_SERVICE_Client * client
The client.
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 ret
Final status code.
Definition: gnunet-arm.c:89
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
A namecache client.
static struct GNUNET_STATISTICS_Handle * statistics
Handle to the statistics service.
static struct GNUNET_NAMECACHE_PluginFunctions * GSN_database
Database handle.
int(* lookup_block)(void *cls, const struct GNUNET_HashCode *query, GNUNET_NAMECACHE_BlockCallback iter, void *iter_cls)
Get the block for a particular zone and label in the datastore.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2618
struct GNUNET_NAMECACHE_Header gns_header
Type will be GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK_RESPONSE.
Definition: namecache.h:81
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
static struct GNUNET_PEERINFO_NotifyContext * nc
Iterator context.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
struct GNUNET_HashCode query
The query.
Definition: namecache.h:68
uint32_t r_id
Request ID in NBO.
Definition: namecache.h:51
#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
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
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◆ check_block_cache()

static int check_block_cache ( void *  cls,
const struct BlockCacheMessage rp_msg 
)
static

Check a GNUNET_MESSAGE_TYPE_NAMECACHE_BLOCK_CACHE message.

Parameters
clsour struct NamecacheClient
rp_msgmessage to process
Returns
GNUNET_OK (always fine)

Definition at line 284 of file gnunet-service-namecache.c.

References GNUNET_OK.

286 {
287  return GNUNET_OK;
288 }
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78

◆ handle_block_cache()

static void handle_block_cache ( void *  cls,
const struct BlockCacheMessage rp_msg 
)
static

Handles a GNUNET_MESSAGE_TYPE_NAMECACHE_BLOCK_CACHE message.

Parameters
clsour struct NamecacheClient
rp_msgmessage to process

Definition at line 298 of file gnunet-service-namecache.c.

References GNUNET_NAMECACHE_PluginFunctions::cache_block, NamecacheClient::client, GNUNET_NAMECACHE_PluginFunctions::cls, BlockCacheMessage::derived_key, GNUNET_GNSRECORD_Block::derived_key, env, GNUNET_GNSRECORD_Block::expiration_time, BlockCacheMessage::expire, BlockCacheMessage::gns_header, BlockCacheResponseMessage::gns_header, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, GNUNET_malloc, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_NAMECACHE_BLOCK_CACHE_RESPONSE, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_NO, GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_update(), GNUNET_STRINGS_absolute_time_to_string(), GNUNET_TIME_absolute_ntoh(), GNUNET_NAMECACHE_Header::header, NamecacheClient::mq, nc, BlockCacheResponseMessage::op_result, GNUNET_GNSRECORD_Block::purpose, GNUNET_NAMECACHE_Header::r_id, res, BlockCacheMessage::signature, GNUNET_GNSRECORD_Block::signature, GNUNET_CRYPTO_EccSignaturePurpose::size, and GNUNET_MessageHeader::size.

300 {
301  struct NamecacheClient *nc = cls;
302  struct GNUNET_MQ_Envelope *env;
303  struct BlockCacheResponseMessage *rpr_msg;
304  struct GNUNET_GNSRECORD_Block *block;
305  size_t esize;
306  int res;
307 
309  "blocks cached",
310  1,
311  GNUNET_NO);
312  esize = ntohs (rp_msg->gns_header.header.size) - sizeof (struct BlockCacheMessage);
313  block = GNUNET_malloc (sizeof (struct GNUNET_GNSRECORD_Block) + esize);
314  block->signature = rp_msg->signature;
315  block->derived_key = rp_msg->derived_key;
316  block->purpose.size = htonl (sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
317  sizeof (struct GNUNET_TIME_AbsoluteNBO) +
318  esize);
319  block->expiration_time = rp_msg->expire;
321  "Received NAMECACHE_BLOCK_CACHE message with expiration time %s\n",
323  GNUNET_memcpy (&block[1],
324  &rp_msg[1],
325  esize);
327  block);
328  GNUNET_free (block);
329  env = GNUNET_MQ_msg (rpr_msg,
331  rpr_msg->gns_header.r_id = rp_msg->gns_header.r_id;
332  rpr_msg->op_result = htonl (res);
333  GNUNET_MQ_send (nc->mq,
334  env);
336 }
#define GNUNET_MESSAGE_TYPE_NAMECACHE_BLOCK_CACHE_RESPONSE
Service to client: result of block cache request.
struct GNUNET_TIME_AbsoluteNBO expiration_time
Expiration time of the block.
void * cls
Closure to pass to all plugin functions.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:670
struct GNUNET_MQ_Handle * mq
The message queue to talk to client.
struct GNUNET_CRYPTO_EcdsaPublicKey derived_key
Derived public key.
Definition: namecache.h:125
Response to a request to cache a block.
Definition: namecache.h:134
struct GNUNET_MessageHeader header
header.type will be GNUNET_MESSAGE_TYPE_NAMECACHE_* header.size will be message size ...
Definition: namecache.h:46
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
#define GNUNET_NO
Definition: gnunet_common.h:81
struct GNUNET_SERVICE_Client * client
The client.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
Information we have in an encrypted block with record data (i.e.
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
Time for absolute time used by GNUnet, in microseconds and in network byte order. ...
header of what an ECC signature signs this must be followed by "size - 8" bytes of the actual signed ...
int(* cache_block)(void *cls, const struct GNUNET_GNSRECORD_Block *block)
Cache a block in the datastore.
A namecache client.
#define GNUNET_memcpy(dst, src, n)
Cache a record in the namecache.
Definition: namecache.h:105
static struct GNUNET_STATISTICS_Handle * statistics
Handle to the statistics service.
static struct GNUNET_NAMECACHE_PluginFunctions * GSN_database
Database handle.
uint32_t size
How many bytes does this signature sign? (including this purpose header); in network byte order (!)...
static int res
struct GNUNET_NAMECACHE_Header gns_header
Type will be GNUNET_MESSAGE_TYPE_NAMECACHE_BLOCK_CACHE_RESPONSE.
Definition: namecache.h:139
static struct GNUNET_PEERINFO_NotifyContext * nc
Iterator context.
struct GNUNET_TIME_AbsoluteNBO expire
Expiration time.
Definition: namecache.h:115
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
struct GNUNET_CRYPTO_EcdsaSignature signature
Signature of the block.
uint32_t r_id
Request ID in NBO.
Definition: namecache.h:51
#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
const char * GNUNET_STRINGS_absolute_time_to_string(struct GNUNET_TIME_Absolute t)
Like asctime, except for GNUnet time.
Definition: strings.c:792
struct GNUNET_CRYPTO_EcdsaSignature signature
Signature.
Definition: namecache.h:120
int32_t op_result
GNUNET_OK on success, GNUNET_SYSERR error
Definition: namecache.h:144
struct GNUNET_CRYPTO_EccSignaturePurpose purpose
Number of bytes signed; also specifies the number of bytes of encrypted data that follow...
struct GNUNET_CRYPTO_EcdsaPublicKey derived_key
Derived key used for signing; hash of this is the query.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
#define GNUNET_malloc(size)
Wrapper around malloc.
#define GNUNET_free(ptr)
Wrapper around free.
struct GNUNET_NAMECACHE_Header gns_header
Type will be GNUNET_MESSAGE_TYPE_NAMECACHE_BLOCK_CACHE.
Definition: namecache.h:110
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◆ run()

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

Process namecache requests.

Parameters
clsclosure
cfgconfiguration to use
servicethe initialized service

Definition at line 347 of file gnunet-service-namecache.c.

References cfg, cleanup_task(), client_connect_cb(), client_disconnect_cb(), db_lib_name, GNUNET_asprintf(), GNUNET_CONFIGURATION_get_value_string(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_log, GNUNET_MESSAGE_TYPE_NAMECACHE_BLOCK_CACHE, GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK, GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_MQ_hd_var_size, GNUNET_OK, GNUNET_PLUGIN_load(), GNUNET_SCHEDULER_add_now(), GNUNET_SCHEDULER_add_shutdown(), GNUNET_SERVICE_MAIN(), GNUNET_SERVICE_OPTION_NONE, and GNUNET_STATISTICS_create().

350 {
351  char *database;
352 
354  "Starting namecache service\n");
355  GSN_cfg = cfg;
356 
357  /* Loading database plugin */
358  if (GNUNET_OK !=
360  "namecache",
361  "database",
362  &database))
364  "No database backend configured\n");
365 
367  "libgnunet_plugin_namecache_%s",
368  database);
370  (void *) GSN_cfg);
371  GNUNET_free (database);
372  if (NULL == GSN_database)
373  {
375  "Could not load database backend `%s'\n",
376  db_lib_name);
378  NULL);
379  return;
380  }
381  statistics = GNUNET_STATISTICS_create ("namecache",
382  cfg);
383 
384  /* Configuring server handles */
386  NULL);
387 }
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:1293
struct GNUNET_STATISTICS_Handle * GNUNET_STATISTICS_create(const char *subsystem, const struct GNUNET_CONFIGURATION_Handle *cfg)
Get handle for the statistics service.
static char * db_lib_name
Name of the database plugin.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
int GNUNET_asprintf(char **buf, const char *format,...)
Like asprintf, just portable.
static struct GNUNET_STATISTICS_Handle * statistics
Handle to the statistics service.
static struct GNUNET_NAMECACHE_PluginFunctions * GSN_database
Database handle.
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:1273
int GNUNET_CONFIGURATION_get_value_string(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be a string.
static struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
Definition: gnunet-arm.c:104
static const struct GNUNET_CONFIGURATION_Handle * GSN_cfg
Configuration handle.
static void cleanup_task(void *cls)
Task run during shutdown.
#define GNUNET_log(kind,...)
void * GNUNET_PLUGIN_load(const char *library_name, void *arg)
Setup plugin (runs the "init" callback and returns whatever "init" returned).
Definition: plugin.c:210
#define GNUNET_free(ptr)
Wrapper around free.
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◆ GNUNET_SERVICE_MAIN()

GNUNET_SERVICE_MAIN ( "namecache"  ,
GNUNET_SERVICE_OPTION_NONE  ,
run,
client_connect_cb,
client_disconnect_cb,
NULL  ,
GNUNET_MQ_hd_fixed_size(lookup_block, GNUNET_MESSAGE_TYPE_NAMECACHE_LOOKUP_BLOCK, struct LookupBlockMessage, NULL)  ,
GNUNET_MQ_hd_var_size(block_cache, GNUNET_MESSAGE_TYPE_NAMECACHE_BLOCK_CACHE, struct BlockCacheMessage, NULL)  ,
GNUNET_MQ_handler_end()   
)

Define "main" method using service macro.

Referenced by run().

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Variable Documentation

◆ GSN_cfg

const struct GNUNET_CONFIGURATION_Handle* GSN_cfg
static

Configuration handle.

Definition at line 61 of file gnunet-service-namecache.c.

◆ statistics

struct GNUNET_STATISTICS_Handle* statistics
static

Handle to the statistics service.

Definition at line 66 of file gnunet-service-namecache.c.

◆ GSN_database

struct GNUNET_NAMECACHE_PluginFunctions* GSN_database
static

Database handle.

Definition at line 71 of file gnunet-service-namecache.c.

◆ db_lib_name

char* db_lib_name
static

Name of the database plugin.

Definition at line 76 of file gnunet-service-namecache.c.

Referenced by cleanup_task(), and run().