gnunet-daemon-latency-logger.c

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/*
      This file is part of GNUnet
      Copyright (C) 2008--2014 GNUnet e.V.
 
      GNUnet is free software: you can redistribute it and/or modify it
      under the terms of the GNU Affero General Public License as published
      by the Free Software Foundation, either version 3 of the License,
      or (at your option) any later version.
 
      GNUnet is distributed in the hope that it will be useful, but
      WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      Affero General Public License for more details.
 
      You should have received a copy of the GNU Affero General Public License
      along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
     SPDX-License-Identifier: AGPL3.0-or-later
 */
 
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_ats_service.h"
#include <sqlite3.h>
 
 
#define LOG(type, ...)                           \
  GNUNET_log (type, __VA_ARGS__)
 
#define DEBUG(...)                              \
  LOG (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
 
#define LOG_SQLITE(db, msg, level, cmd)                                 \
  do {                                                                  \
    GNUNET_log_from (level, "sqlite", _ ( \
                       "`%s' failed at %s:%d with error: %s\n"), \
                     cmd, __FILE__, __LINE__, sqlite3_errmsg (db));  \
    if (msg != NULL)                                                    \
    GNUNET_asprintf (msg, _ ("`%s' failed at %s:%u with error: %s"), cmd, \
                     __FILE__, __LINE__, sqlite3_errmsg (db));     \
  } while (0)
 
 
struct Entry
{
  struct GNUNET_PeerIdentity id;
 
  unsigned int latency;
};
 
 
static struct GNUNET_CONTAINER_MultiPeerMap *map;
 
static struct sqlite3 *db;
 
static struct GNUNET_ATS_PerformanceHandle *ats;
 
static struct sqlite3_stmt *stmt_insert;
 
 
static int
free_iterator (void *cls,
               const struct GNUNET_PeerIdentity *key,
               void *value)
{
  struct Entry *e = cls;
 
  GNUNET_assert (GNUNET_YES ==
                 GNUNET_CONTAINER_multipeermap_remove (map, key, e));
  GNUNET_free (e);
  return GNUNET_YES;
}
 
 
static void
do_shutdown (void *cls)
{
  GNUNET_ATS_performance_done (ats);
  ats = NULL;
  if (NULL != stmt_insert)
  {
    sqlite3_finalize (stmt_insert);
    stmt_insert = NULL;
  }
  GNUNET_break (SQLITE_OK == sqlite3_close (db));
  db = NULL;
  if (NULL != map)
  {
    GNUNET_assert (GNUNET_SYSERR !=
                   GNUNET_CONTAINER_multipeermap_iterate (map, free_iterator,
                                                          NULL));
    GNUNET_CONTAINER_multipeermap_destroy (map);
    map = NULL;
  }
}
 
 
static void
addr_info_cb (void *cls,
              const struct GNUNET_HELLO_Address *address,
              int address_active,
              struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
              struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
              const struct GNUNET_ATS_Properties *prop)
{
  static const char *query_insert =
    "INSERT INTO ats_info("
    " id,"
    " val,"
    " timestamp"
    ") VALUES ("
    " ?1,"
    " ?2,"
    " datetime('now')"
    ");";
  struct Entry *entry;
  int latency; /* FIXME: type!? */
 
  if (NULL == address)
  {
    /* ATS service temporarily disconnected */
    return;
  }
 
  GNUNET_assert (NULL != db);
  if (GNUNET_YES != address_active)
    return;
  latency = (int) prop->delay.rel_value_us;
  entry = NULL;
  if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (map,
                                                            &address->peer))
  {
    entry = GNUNET_CONTAINER_multipeermap_get (map, &address->peer);
    GNUNET_assert (NULL != entry);
    if (latency == entry->latency)
      return;
  }
  if (NULL == stmt_insert)
  {
    if (SQLITE_OK != sqlite3_prepare_v2 (db, query_insert, -1, &stmt_insert,
                                         NULL))
    {
      LOG_SQLITE (db, NULL, GNUNET_ERROR_TYPE_ERROR, "sqlite3_prepare_v2");
      goto err_shutdown;
    }
  }
  if ((SQLITE_OK != sqlite3_bind_text (stmt_insert, 1,
                                       GNUNET_i2s (&address->peer), -1,
                                       SQLITE_STATIC)) ||
      (SQLITE_OK != sqlite3_bind_int (stmt_insert, 2, latency)))
  {
    LOG_SQLITE (db, NULL, GNUNET_ERROR_TYPE_ERROR, "sqlite3_bind_text");
    goto err_shutdown;
  }
  if (SQLITE_DONE != sqlite3_step (stmt_insert))
  {
    LOG_SQLITE (db, NULL, GNUNET_ERROR_TYPE_ERROR, "sqlite3_step");
    goto err_shutdown;
  }
  if (SQLITE_OK != sqlite3_reset (stmt_insert))
  {
    LOG_SQLITE (db, NULL, GNUNET_ERROR_TYPE_ERROR, "sqlite3_insert");
    goto err_shutdown;
  }
  if (NULL == entry)
  {
    entry = GNUNET_new (struct Entry);
    entry->id = address->peer;
    GNUNET_CONTAINER_multipeermap_put (map,
                                       &entry->id, entry,
                                       GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
  }
  entry->latency = latency;
  return;
 
err_shutdown:
  GNUNET_SCHEDULER_shutdown ();
}
 
 
static void
run (void *cls, char *const *args, const char *cfgfile,
     const struct GNUNET_CONFIGURATION_Handle *c)
{
  const char *query_create =
    "CREATE TABLE ats_info ("
    "id TEXT,"
    "val INTEGER,"
    "timestamp NUMERIC"
    ");";
  char *dbfile;
 
  if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (c, "LATENCY-LOGGER",
                                                            "DBFILE",
                                                            &dbfile))
  {
    GNUNET_break (0);
    return;
  }
  if (SQLITE_OK != sqlite3_open (dbfile, &db))
  {
    if (NULL != db)
    {
      LOG_SQLITE (db, NULL, GNUNET_ERROR_TYPE_ERROR, "sqlite_open_v2");
      GNUNET_break (SQLITE_OK == sqlite3_close (db));
    }
    else
      LOG (GNUNET_ERROR_TYPE_ERROR, "Cannot open sqlite file %s\n", dbfile);
    GNUNET_free (dbfile);
    return;
  }
  if (0 != sqlite3_exec (db, query_create, NULL, NULL, NULL))
    DEBUG ("SQLite Error: %d.  Perhaps the database `%s' already exits.\n",
           sqlite3_errcode (db), dbfile);
  DEBUG ("Opened database %s\n", dbfile);
  GNUNET_free (dbfile);
  dbfile = NULL;
  ats = GNUNET_ATS_performance_init (c, &addr_info_cb, NULL);
  map = GNUNET_CONTAINER_multipeermap_create (30, GNUNET_YES);
  GNUNET_SCHEDULER_add_shutdown (&do_shutdown, NULL);
}
 
 
int
main (int argc, char *const *argv)
{
  static const struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_OPTION_END
  };
  int ret;
 
  if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
    return 2;
  ret =
    (GNUNET_OK ==
     GNUNET_PROGRAM_run (argc, argv, "gnunet-daemon-latency-logger",
                         _ (
                           "Daemon to log latency values of connections to neighbours"),
                         options, &run, NULL)) ? 0 : 1;
  GNUNET_free_nz ((void *) argv);
  return ret;
}