gnunet-dht-monitor.c

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/*
     This file is part of GNUnet.
     Copyright (C) 2012 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_dht_service.h"
 
static unsigned int block_type;
 
static char *query_key;
 
static int raw_key;
 
static struct GNUNET_TIME_Relative timeout_request = { 60 * 1000 * 1000 };
 
static int verbose;
 
static struct GNUNET_DHT_Handle *dht_handle;
 
static const struct GNUNET_CONFIGURATION_Handle *cfg;
 
static struct GNUNET_DHT_MonitorHandle *monitor_handle;
 
static unsigned int result_count;
 
static int ret;
 
static struct GNUNET_SCHEDULER_Task *tt;
 
 
static void
cleanup_task (void *cls)
{
  if (verbose)
    fprintf (stderr, "%s", "Cleaning up!\n");
  if (NULL != monitor_handle)
  {
    GNUNET_DHT_monitor_stop (monitor_handle);
    monitor_handle = NULL;
  }
  if (NULL != dht_handle)
  {
    GNUNET_DHT_disconnect (dht_handle);
    dht_handle = NULL;
  }
  if (NULL != tt)
  {
    GNUNET_SCHEDULER_cancel (tt);
    tt = NULL;
  }
}
 
 
static void
timeout_task (void *cls)
{
  tt = NULL;
  GNUNET_SCHEDULER_shutdown ();
}
 
 
static void
get_callback (void *cls,
              enum GNUNET_DHT_RouteOption options,
              enum GNUNET_BLOCK_Type type,
              uint32_t hop_count,
              uint32_t desired_replication_level,
              const struct GNUNET_HashCode *key)
{
  fprintf (stdout,
           "GET #%u: type %d, key `%s'\n",
           result_count,
           (int) type,
           GNUNET_h2s_full (key));
  result_count++;
}
 
 
static void
get_resp_callback (void *cls,
                   enum GNUNET_BLOCK_Type type,
                   const struct GNUNET_PeerIdentity *trunc_peer,
                   const struct GNUNET_DHT_PathElement *get_path,
                   unsigned int get_path_length,
                   const struct GNUNET_DHT_PathElement *put_path,
                   unsigned int put_path_length,
                   struct GNUNET_TIME_Absolute exp,
                   const struct GNUNET_HashCode *key,
                   const void *data,
                   size_t size)
{
  fprintf (stdout,
           (GNUNET_BLOCK_TYPE_TEST == type)
           ? "RESPONSE #%u (%s): type %d, key `%s', data `%.*s'\n"
           : "RESPONSE #%u (%s): type %d, key `%s'\n",
           result_count,
           GNUNET_STRINGS_absolute_time_to_string (exp),
           (int) type,
           GNUNET_h2s_full (key),
           (unsigned int) size,
           (char *) data);
  result_count++;
}
 
 
static void
put_callback (void *cls,
              enum GNUNET_DHT_RouteOption options,
              enum GNUNET_BLOCK_Type type,
              uint32_t hop_count,
              uint32_t desired_replication_level,
              const struct GNUNET_PeerIdentity *trunc_peer,
              unsigned int path_length,
              const struct GNUNET_DHT_PathElement *path,
              struct GNUNET_TIME_Absolute exp,
              const struct GNUNET_HashCode *key,
              const void *data,
              size_t size)
{
  fprintf (stdout,
           (GNUNET_BLOCK_TYPE_TEST == type)
           ? "PUT %u (%s): type %d, key `%s', data `%.*s'\n"
           : "PUT %u (%s): type %d, key `%s'\n",
           result_count,
           GNUNET_STRINGS_absolute_time_to_string (exp),
           (int) type,
           GNUNET_h2s_full (key),
           (unsigned int) size,
           (char *) data);
  result_count++;
}
 
 
static void
run (void *cls,
     char *const *args,
     const char *cfgfile,
     const struct GNUNET_CONFIGURATION_Handle *c)
{
  struct GNUNET_HashCode *key;
  struct GNUNET_HashCode hc;
 
  cfg = c;
 
  /* Resolve the key before connecting, so that a bad key does not leak
     the DHT handle (and leave the scheduler with nothing to shut down). */
  if (NULL != query_key)
  {
    key = &hc;
    if (GNUNET_OK != GNUNET_CRYPTO_hash_from_string (query_key, key))
    {
      if (raw_key)
      {
        fprintf (stderr,
                 _ ("`%s' is not a valid key\n"),
                 query_key);
        ret = 1;
        return;
      }
      GNUNET_CRYPTO_hash (query_key, strlen (query_key), key);
    }
  }
  else
  {
    key = NULL;
  }
  if (NULL == (dht_handle = GNUNET_DHT_connect (cfg, 1)))
  {
    fprintf (stderr, "%s", _ ("Failed to connect to DHT service!\n"));
    ret = 1;
    return;
  }
  if (GNUNET_BLOCK_TYPE_ANY == block_type) /* Type of data not set */
    block_type = GNUNET_BLOCK_TYPE_TEST;
  if (verbose)
    fprintf (stderr,
             "Monitoring for %s\n",
             GNUNET_STRINGS_relative_time_to_string (timeout_request,
                                                     GNUNET_NO));
  tt = GNUNET_SCHEDULER_add_delayed (timeout_request, &timeout_task, NULL);
  GNUNET_SCHEDULER_add_shutdown (&cleanup_task, NULL);
  monitor_handle = GNUNET_DHT_monitor_start (dht_handle,
                                             block_type,
                                             key,
                                             &get_callback,
                                             &get_resp_callback,
                                             &put_callback,
                                             NULL);
}
 
 
int
main (int argc, char *const *argv)
{
  struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_option_string ('k',
                                 "key",
                                 "KEY",
                                 gettext_noop (
                                   "the query key, or a string to hash into one if it does not parse as a key (see -K)"),
                                 &query_key),
 
    GNUNET_GETOPT_option_flag ('K',
                               "raw-key",
                               gettext_noop (
                                 "fail instead of hashing -k when it is not a valid key"),
                               &raw_key),
 
    GNUNET_GETOPT_option_uint ('t',
                               "type",
                               "TYPE",
                               gettext_noop ("the type of data to look for"),
                               &block_type),
 
    GNUNET_GETOPT_option_relative_time (
      'T',
      "timeout",
      "TIMEOUT",
      gettext_noop (
        "how long should the monitor command run (default: 60 s, use \"forever\" to run until interrupted)"),
      &timeout_request),
 
    GNUNET_GETOPT_option_flag ('V',
                               "verbose",
                               gettext_noop (
                                 "be verbose (print progress information)"),
                               &verbose),
 
    GNUNET_GETOPT_OPTION_END
  };
 
 
  return (GNUNET_OK ==
          GNUNET_PROGRAM_run (GNUNET_OS_project_data_gnunet (),
                              argc,
                              argv,
                              "gnunet-dht-monitor",
                              gettext_noop (
                                "Prints all packets that go through the DHT."),
                              options,
                              &run,
                              NULL))
         ? ret
         : 1;
}
 
 
/* end of gnunet-dht-monitor.c */