GNUnet  0.11.x
Data Structures | Macros | Functions
plugin_namecache_postgres.c File Reference

postgres-based namecache backend More...

#include "platform.h"
#include "gnunet_namecache_plugin.h"
#include "gnunet_namecache_service.h"
#include "gnunet_gnsrecord_lib.h"
#include "gnunet_pq_lib.h"
#include "namecache.h"
Include dependency graph for plugin_namecache_postgres.c:

Go to the source code of this file.

Data Structures

struct  Plugin
 Handle for a plugin. More...
 

Macros

#define LOG(kind, ...)   GNUNET_log_from (kind, "namecache-postgres", __VA_ARGS__)
 

Functions

static int database_setup (struct Plugin *plugin)
 Initialize the database connections and associated data structures (create tables and indices as needed as well). More...
 
static void namecache_postgres_expire_blocks (struct Plugin *plugin)
 Removes any expired block. More...
 
static void delete_old_block (struct Plugin *plugin, const struct GNUNET_HashCode *query, struct GNUNET_TIME_AbsoluteNBO expiration_time)
 Delete older block in the datastore. More...
 
static int namecache_postgres_cache_block (void *cls, const struct GNUNET_GNSRECORD_Block *block)
 Cache a block in the datastore. More...
 
static int namecache_postgres_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. More...
 
static void database_shutdown (struct Plugin *plugin)
 Shutdown database connection and associate data structures. More...
 
void * libgnunet_plugin_namecache_postgres_init (void *cls)
 Entry point for the plugin. More...
 
void * libgnunet_plugin_namecache_postgres_done (void *cls)
 Exit point from the plugin. More...
 

Detailed Description

postgres-based namecache backend

Author
Christian Grothoff

Definition in file plugin_namecache_postgres.c.

Macro Definition Documentation

◆ LOG

#define LOG (   kind,
  ... 
)    GNUNET_log_from (kind, "namecache-postgres", __VA_ARGS__)

Function Documentation

◆ database_setup()

static int database_setup ( struct Plugin plugin)
static

Initialize the database connections and associated data structures (create tables and indices as needed as well).

Parameters
pluginthe plugin context (state for this module)
Returns
GNUNET_OK on success

Definition at line 60 of file plugin_namecache_postgres.c.

References Plugin::cfg, Plugin::dbh, GNUNET_CONFIGURATION_get_value_yesno(), GNUNET_OK, GNUNET_PQ_connect_with_cfg(), GNUNET_PQ_EXECUTE_STATEMENT_END, GNUNET_PQ_make_execute(), GNUNET_PQ_make_prepare(), GNUNET_PQ_make_try_execute(), GNUNET_PQ_PREPARED_STATEMENT_END, GNUNET_SYSERR, and GNUNET_YES.

Referenced by libgnunet_plugin_namecache_postgres_init().

61 {
62  struct GNUNET_PQ_ExecuteStatement es_temporary =
63  GNUNET_PQ_make_execute ("CREATE TEMPORARY TABLE IF NOT EXISTS ns096blocks ("
64  " query BYTEA NOT NULL DEFAULT '',"
65  " block BYTEA NOT NULL DEFAULT '',"
66  " expiration_time BIGINT NOT NULL DEFAULT 0"
67  ")"
68  "WITH OIDS");
69  struct GNUNET_PQ_ExecuteStatement es_default =
70  GNUNET_PQ_make_execute ("CREATE TABLE IF NOT EXISTS ns096blocks ("
71  " query BYTEA NOT NULL DEFAULT '',"
72  " block BYTEA NOT NULL DEFAULT '',"
73  " expiration_time BIGINT NOT NULL DEFAULT 0"
74  ")"
75  "WITH OIDS");
76  const struct GNUNET_PQ_ExecuteStatement *cr;
77 
78  if (GNUNET_YES ==
80  "namecache-postgres",
81  "TEMPORARY_TABLE"))
82  {
83  cr = &es_temporary;
84  }
85  else
86  {
87  cr = &es_default;
88  }
89  {
90  struct GNUNET_PQ_ExecuteStatement es[] = {
91  *cr,
93  "CREATE INDEX ir_query_hash ON ns096blocks (query,expiration_time)"),
95  "CREATE INDEX ir_block_expiration ON ns096blocks (expiration_time)"),
97  };
98  struct GNUNET_PQ_PreparedStatement ps[] = {
99  GNUNET_PQ_make_prepare ("cache_block",
100  "INSERT INTO ns096blocks (query, block, expiration_time) VALUES "
101  "($1, $2, $3)", 3),
102  GNUNET_PQ_make_prepare ("expire_blocks",
103  "DELETE FROM ns096blocks WHERE expiration_time<$1",
104  1),
105  GNUNET_PQ_make_prepare ("delete_block",
106  "DELETE FROM ns096blocks WHERE query=$1 AND expiration_time<=$2",
107  2),
108  GNUNET_PQ_make_prepare ("lookup_block",
109  "SELECT block FROM ns096blocks WHERE query=$1"
110  " ORDER BY expiration_time DESC LIMIT 1", 1),
112  };
113 
114  plugin->dbh = GNUNET_PQ_connect_with_cfg (plugin->cfg,
115  "namecache-postgres",
116  es,
117  ps);
118  }
119  if (NULL == plugin->dbh)
120  return GNUNET_SYSERR;
121  return GNUNET_OK;
122 }
struct GNUNET_PQ_Context * GNUNET_PQ_connect_with_cfg(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const struct GNUNET_PQ_ExecuteStatement *es, const struct GNUNET_PQ_PreparedStatement *ps)
Connect to a postgres database using the configuration option "CONFIG" in section.
Definition: pq_connect.c:217
struct GNUNET_PQ_ExecuteStatement GNUNET_PQ_make_execute(const char *sql)
Create a struct GNUNET_PQ_ExecuteStatement where errors are fatal.
Definition: pq_exec.c:36
Information needed to run a list of SQL statements using GNUNET_PQ_exec_statements().
Information needed to prepare a list of SQL statements using GNUNET_PQ_prepare_statements().
const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_PQ_PREPARED_STATEMENT_END
Terminator for prepared statement list.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
struct GNUNET_PQ_Context * dbh
Native Postgres database handle.
#define GNUNET_PQ_EXECUTE_STATEMENT_END
Terminator for executable statement list.
#define GNUNET_YES
Definition: gnunet_common.h:77
struct GNUNET_PQ_ExecuteStatement GNUNET_PQ_make_try_execute(const char *sql)
Create a struct GNUNET_PQ_ExecuteStatement where errors should be tolerated.
Definition: pq_exec.c:55
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".
struct GNUNET_PQ_PreparedStatement GNUNET_PQ_make_prepare(const char *name, const char *sql, unsigned int num_args)
Create a struct GNUNET_PQ_PreparedStatement.
Definition: pq_prepare.c:38
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◆ namecache_postgres_expire_blocks()

static void namecache_postgres_expire_blocks ( struct Plugin plugin)
static

Removes any expired block.

Parameters
pluginthe plugin

Definition at line 131 of file plugin_namecache_postgres.c.

References Plugin::dbh, GNUNET_break, GNUNET_DB_STATUS_HARD_ERROR, GNUNET_PQ_eval_prepared_non_select(), GNUNET_PQ_query_param_absolute_time(), GNUNET_PQ_query_param_end, GNUNET_TIME_absolute_get(), and res.

Referenced by namecache_postgres_cache_block().

132 {
134  struct GNUNET_PQ_QueryParam params[] = {
137  };
139 
141  "expire_blocks",
142  params);
144 }
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_absolute_time(const struct GNUNET_TIME_Absolute *x)
Generate query parameter for an absolute time value.
A hard error occurred, retrying will not help.
Definition: gnunet_db_lib.h:39
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:96
static int res
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:118
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_non_select(struct GNUNET_PQ_Context *db, const char *statement_name, const struct GNUNET_PQ_QueryParam *params)
Execute a named prepared statement that is NOT a SELECT statement in connnection using the given para...
Definition: pq_eval.c:164
struct GNUNET_PQ_Context * dbh
Native Postgres database handle.
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:64
Time for absolute times used by GNUnet, in microseconds.
GNUNET_DB_QueryStatus
Status code returned from functions running database commands.
Definition: gnunet_db_lib.h:34
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◆ delete_old_block()

static void delete_old_block ( struct Plugin plugin,
const struct GNUNET_HashCode query,
struct GNUNET_TIME_AbsoluteNBO  expiration_time 
)
static

Delete older block in the datastore.

Parameters
pluginthe plugin
queryquery for the block
expiration_timehow old does the block have to be for deletion

Definition at line 155 of file plugin_namecache_postgres.c.

References Plugin::dbh, GNUNET_break, GNUNET_DB_STATUS_HARD_ERROR, GNUNET_PQ_eval_prepared_non_select(), GNUNET_PQ_query_param_absolute_time_nbo(), GNUNET_PQ_query_param_auto_from_type, GNUNET_PQ_query_param_end, and res.

Referenced by namecache_postgres_cache_block().

158 {
159  struct GNUNET_PQ_QueryParam params[] = {
161  GNUNET_PQ_query_param_absolute_time_nbo (&expiration_time),
163  };
165 
167  "delete_block",
168  params);
170 }
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_absolute_time_nbo(const struct GNUNET_TIME_AbsoluteNBO *x)
Generate query parameter for an absolute time value.
A hard error occurred, retrying will not help.
Definition: gnunet_db_lib.h:39
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:96
#define GNUNET_PQ_query_param_auto_from_type(x)
Generate fixed-size query parameter with size determined by variable type.
static int res
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_non_select(struct GNUNET_PQ_Context *db, const char *statement_name, const struct GNUNET_PQ_QueryParam *params)
Execute a named prepared statement that is NOT a SELECT statement in connnection using the given para...
Definition: pq_eval.c:164
struct GNUNET_PQ_Context * dbh
Native Postgres database handle.
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:64
GNUNET_DB_QueryStatus
Status code returned from functions running database commands.
Definition: gnunet_db_lib.h:34
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◆ namecache_postgres_cache_block()

static int namecache_postgres_cache_block ( void *  cls,
const struct GNUNET_GNSRECORD_Block block 
)
static

Cache a block in the datastore.

Parameters
clsclosure (internal context for the plugin)
blockblock to cache
Returns
GNUNET_OK on success, else GNUNET_SYSERR

Definition at line 181 of file plugin_namecache_postgres.c.

References Plugin::dbh, delete_old_block(), GNUNET_GNSRECORD_Block::derived_key, GNUNET_GNSRECORD_Block::expiration_time, GNUNET_break, GNUNET_CRYPTO_hash(), GNUNET_OK, GNUNET_PQ_eval_prepared_non_select(), GNUNET_PQ_query_param_absolute_time_nbo(), GNUNET_PQ_query_param_auto_from_type, GNUNET_PQ_query_param_end, GNUNET_PQ_query_param_fixed_size(), GNUNET_SYSERR, namecache_postgres_expire_blocks(), plugin, GNUNET_GNSRECORD_Block::purpose, res, and GNUNET_CRYPTO_EccSignaturePurpose::size.

Referenced by libgnunet_plugin_namecache_postgres_init().

183 {
184  struct Plugin *plugin = cls;
185  struct GNUNET_HashCode query;
186  size_t block_size = ntohl (block->purpose.size)
187  + sizeof(struct GNUNET_CRYPTO_EcdsaPublicKey)
188  + sizeof(struct GNUNET_CRYPTO_EcdsaSignature);
189  struct GNUNET_PQ_QueryParam params[] = {
191  GNUNET_PQ_query_param_fixed_size (block, block_size),
194  };
196 
199  sizeof(struct GNUNET_CRYPTO_EcdsaPublicKey),
200  &query);
201  if (block_size > 64 * 65536)
202  {
203  GNUNET_break (0);
204  return GNUNET_SYSERR;
205  }
206  delete_old_block (plugin,
207  &query,
208  block->expiration_time);
209 
211  "cache_block",
212  params);
213  if (0 > res)
214  return GNUNET_SYSERR;
215  return GNUNET_OK;
216 }
struct GNUNET_TIME_AbsoluteNBO expiration_time
Expiration time of the block.
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_absolute_time_nbo(const struct GNUNET_TIME_AbsoluteNBO *x)
Generate query parameter for an absolute time value.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:96
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:48
#define GNUNET_PQ_query_param_auto_from_type(x)
Generate fixed-size query parameter with size determined by variable type.
an ECC signature using ECDSA
uint32_t size
How many bytes does this signature sign? (including this purpose header); in network byte order (!)...
A 512-bit hashcode.
static int res
static char * plugin
Solver plugin name as string.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
static void delete_old_block(struct Plugin *plugin, const struct GNUNET_HashCode *query, struct GNUNET_TIME_AbsoluteNBO expiration_time)
Delete older block in the datastore.
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_non_select(struct GNUNET_PQ_Context *db, const char *statement_name, const struct GNUNET_PQ_QueryParam *params)
Execute a named prepared statement that is NOT a SELECT statement in connnection using the given para...
Definition: pq_eval.c:164
static void namecache_postgres_expire_blocks(struct Plugin *plugin)
Removes any expired block.
Handle for a plugin.
Definition: block.c:37
struct GNUNET_PQ_Context * dbh
Native Postgres database handle.
Public ECC key (always for Curve25519) encoded in a format suitable for network transmission and ECDS...
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:64
struct GNUNET_PQ_QueryParam GNUNET_PQ_query_param_fixed_size(const void *ptr, size_t ptr_size)
Generate query parameter for a buffer ptr of ptr_size bytes.
GNUNET_DB_QueryStatus
Status code returned from functions running database commands.
Definition: gnunet_db_lib.h:34
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.
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◆ namecache_postgres_lookup_block()

static int namecache_postgres_lookup_block ( void *  cls,
const struct GNUNET_HashCode query,
GNUNET_NAMECACHE_BlockCallback  iter,
void *  iter_cls 
)
static

Get the block for a particular zone and label in the datastore.

Will return at most one result to the iterator.

Parameters
clsclosure (internal context for the plugin)
queryhash of public key derived from the zone and the label
iterfunction to call with the result
iter_clsclosure for iter
Returns
GNUNET_OK on success, GNUNET_NO if there were no results, GNUNET_SYSERR on error

Definition at line 230 of file plugin_namecache_postgres.c.

References bsize, Plugin::dbh, GNUNET_break, GNUNET_DB_STATUS_SUCCESS_NO_RESULTS, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_WARNING, GNUNET_NO, GNUNET_OK, GNUNET_PQ_cleanup_result(), GNUNET_PQ_eval_prepared_singleton_select(), GNUNET_PQ_query_param_auto_from_type, GNUNET_PQ_query_param_end, GNUNET_PQ_result_spec_end, GNUNET_PQ_result_spec_variable_size(), GNUNET_SYSERR, Plugin::iter, LOG, plugin, GNUNET_GNSRECORD_Block::purpose, res, and GNUNET_CRYPTO_EccSignaturePurpose::size.

Referenced by libgnunet_plugin_namecache_postgres_init().

234 {
235  struct Plugin *plugin = cls;
236  size_t bsize;
237  struct GNUNET_GNSRECORD_Block *block;
238  struct GNUNET_PQ_QueryParam params[] = {
241  };
242  struct GNUNET_PQ_ResultSpec rs[] = {
244  (void **) &block,
245  &bsize),
247  };
249 
251  "lookup_block",
252  params,
253  rs);
254  if (0 > res)
255  {
257  "Failing lookup block in namecache (postgres error)\n");
258  return GNUNET_SYSERR;
259  }
261  {
262  /* no result */
264  "Ending iteration (no more results)\n");
265  return GNUNET_NO;
266  }
267  if ((bsize < sizeof(*block)) ||
268  (bsize != ntohl (block->purpose.size)
269  + sizeof(struct GNUNET_CRYPTO_EcdsaPublicKey)
270  + sizeof(struct GNUNET_CRYPTO_EcdsaSignature)))
271  {
272  GNUNET_break (0);
274  "Failing lookup (corrupt block)\n");
276  return GNUNET_SYSERR;
277  }
278  iter (iter_cls,
279  block);
281  return GNUNET_OK;
282 }
Description of a DB result cell.
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
Information we have in an encrypted block with record data (i.e.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define GNUNET_PQ_result_spec_end
End of result parameter specification.
#define GNUNET_PQ_query_param_end
End of query parameter specification.
Definition: gnunet_pq_lib.h:96
struct GNUNET_PQ_ResultSpec GNUNET_PQ_result_spec_variable_size(const char *name, void **dst, size_t *sptr)
Variable-size result expected.
enum GNUNET_DB_QueryStatus GNUNET_PQ_eval_prepared_singleton_select(struct GNUNET_PQ_Context *db, const char *statement_name, const struct GNUNET_PQ_QueryParam *params, struct GNUNET_PQ_ResultSpec *rs)
Execute a named prepared statement that is a SELECT statement which must return a single result in co...
Definition: pq_eval.c:258
#define LOG(kind,...)
#define GNUNET_PQ_query_param_auto_from_type(x)
Generate fixed-size query parameter with size determined by variable type.
an ECC signature using ECDSA
uint32_t size
How many bytes does this signature sign? (including this purpose header); in network byte order (!)...
static unsigned int bsize
static int res
static char * plugin
Solver plugin name as string.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
Handle for a plugin.
Definition: block.c:37
struct GNUNET_PQ_Context * dbh
Native Postgres database handle.
Public ECC key (always for Curve25519) encoded in a format suitable for network transmission and ECDS...
Description of a DB query parameter.
Definition: gnunet_pq_lib.h:64
GNUNET_DB_QueryStatus
Status code returned from functions running database commands.
Definition: gnunet_db_lib.h:34
The transaction succeeded, but yielded zero results.
Definition: gnunet_db_lib.h:53
struct GNUNET_CRYPTO_EccSignaturePurpose purpose
Number of bytes signed; also specifies the number of bytes of encrypted data that follow...
void GNUNET_PQ_cleanup_result(struct GNUNET_PQ_ResultSpec *rs)
Free all memory that was allocated in rs during GNUNET_PQ_extract_result().
Definition: pq.c:130
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◆ database_shutdown()

static void database_shutdown ( struct Plugin plugin)
static

Shutdown database connection and associate data structures.

Parameters
pluginthe plugin context (state for this module)

Definition at line 292 of file plugin_namecache_postgres.c.

References Plugin::dbh, and GNUNET_PQ_disconnect().

Referenced by libgnunet_plugin_namecache_postgres_done(), and libgnunet_plugin_namecache_postgres_init().

293 {
294  GNUNET_PQ_disconnect (plugin->dbh);
295  plugin->dbh = NULL;
296 }
void GNUNET_PQ_disconnect(struct GNUNET_PQ_Context *db)
Disconnect from the database, destroying the prepared statements and releasing other associated resou...
Definition: pq_connect.c:246
struct GNUNET_PQ_Context * dbh
Native Postgres database handle.
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◆ libgnunet_plugin_namecache_postgres_init()

void* libgnunet_plugin_namecache_postgres_init ( void *  cls)

Entry point for the plugin.

Parameters
clsthe struct GNUNET_NAMECACHE_PluginEnvironment *
Returns
NULL on error, otherwise the plugin context

Definition at line 306 of file plugin_namecache_postgres.c.

References Plugin::api, GNUNET_NAMECACHE_PluginFunctions::cache_block, Plugin::cfg, GNUNET_NAMECACHE_PluginFunctions::cls, database_setup(), database_shutdown(), GNUNET_ERROR_TYPE_INFO, GNUNET_new, GNUNET_OK, LOG, GNUNET_NAMECACHE_PluginFunctions::lookup_block, namecache_postgres_cache_block(), namecache_postgres_lookup_block(), and plugin.

307 {
308  static struct Plugin plugin;
309  const struct GNUNET_CONFIGURATION_Handle *cfg = cls;
311 
312  if (NULL != plugin.cfg)
313  return NULL; /* can only initialize once! */
314  memset (&plugin, 0, sizeof(struct Plugin));
315  plugin.cfg = cfg;
316  if (GNUNET_OK != database_setup (&plugin))
317  {
319  return NULL;
320  }
322  api->cls = &plugin;
326  "Postgres namecache plugin running\n");
327  return api;
328 }
void * cls
Closure to pass to all plugin functions.
static int namecache_postgres_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.
static const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we are using.
Definition: gnunet-abd.c:36
static void database_shutdown(struct Plugin *plugin)
Shutdown database connection and associate data structures.
#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.
static int namecache_postgres_cache_block(void *cls, const struct GNUNET_GNSRECORD_Block *block)
Cache a block in the datastore.
int(* cache_block)(void *cls, const struct GNUNET_GNSRECORD_Block *block)
Cache a block in the datastore.
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.
#define LOG(kind,...)
static char * plugin
Solver plugin name as string.
static int database_setup(struct Plugin *plugin)
Initialize the database connections and associated data structures (create tables and indices as need...
struct returned by the initialization function of the plugin
configuration data
Definition: configuration.c:85
Handle for a plugin.
Definition: block.c:37
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◆ libgnunet_plugin_namecache_postgres_done()

void* libgnunet_plugin_namecache_postgres_done ( void *  cls)

Exit point from the plugin.

Parameters
clsthe plugin context (as returned by "init")
Returns
always NULL

Definition at line 338 of file plugin_namecache_postgres.c.

References Plugin::api, Plugin::cfg, GNUNET_NAMECACHE_PluginFunctions::cls, database_shutdown(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, LOG, and plugin.

339 {
341  struct Plugin *plugin = api->cls;
342 
343  database_shutdown (plugin);
344  plugin->cfg = NULL;
345  GNUNET_free (api);
347  "Postgres namecache plugin is finished\n");
348  return NULL;
349 }
void * cls
Closure to pass to all plugin functions.
static void database_shutdown(struct Plugin *plugin)
Shutdown database connection and associate data structures.
const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
#define LOG(kind,...)
static char * plugin
Solver plugin name as string.
struct returned by the initialization function of the plugin
Handle for a plugin.
Definition: block.c:37
#define GNUNET_free(ptr)
Wrapper around free.
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