gnunet

gnunet-core.c (6304B)

---

 /*
      This file is part of GNUnet.
      Copyright (C) 2011, 2012, 2014, 2025 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
  */
 
 /**
  * @file core/gnunet-core.c
  * @brief Print information about other peers known to CORE.
  * @author Nathan Evans
  * @author Martin Schanzenbach
  */
 #include "platform.h"
 #include "gnunet_time_lib.h"
 #include "gnunet_util_lib.h"
 #include "gnunet_core_service.h"
 
 /**
  * Return code
  */
 static int ret;
 
 /**
  * Option -m.
  */
 static int monitor_connections;
 
 /**
  * Option -s.
  */
 static int show_conns;
 
 /**
  * Handle to the CORE monitor.
  */
 static struct GNUNET_CORE_MonitorHandle *mh;
 
 /**
  * Task run in monitor mode when the user presses CTRL-C to abort.
  * Stops monitoring activity.
  *
  * @param cls NULL
  */
 static void
 shutdown_task (void *cls)
 {
   (void) cls;
   if (NULL != mh)
   {
     GNUNET_CORE_monitor_stop (mh);
     mh = NULL;
   }
 }
 
 
 /**
  * Function called to notify core users that another
  * peer changed its state with us.
  *
  * @param cls closure
  * @param peer the peer that changed state
  * @param state new state of the peer
  * @param timeout timeout for the new state
  */
 static void
 monitor_cb (void *cls,
             const struct GNUNET_PeerIdentity *peer,
             enum GNUNET_CORE_KxState state,
             struct GNUNET_TIME_Absolute timeout)
 {
   struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
   const char *now_str;
   const char *state_str;
 
   (void) cls;
   if (((NULL == peer) || (GNUNET_CORE_KX_ITERATION_FINISHED == state)) &&
       (GNUNET_NO == monitor_connections))
   {
     GNUNET_SCHEDULER_shutdown ();
     return;
   }
 
   switch (state)
   {
   case GNUNET_CORE_KX_STATE_INITIATOR_HELLO_SENT:
     state_str = _ ("Hello sent (I)");
     break;
 
   case GNUNET_CORE_KX_STATE_INITIATOR_DONE_SENT:
     state_str = _ ("Done sent (I)");
     break;
 
   case GNUNET_CORE_KX_STATE_AWAIT_INITIATION:
     state_str = _ ("Awaiting initiation (R)");
     break;
 
   case GNUNET_CORE_KX_STATE_INITIATOR_HELLO_RECEIVED:
     state_str = _ ("Hello received (R)");
     break;
 
   case GNUNET_CORE_KX_STATE_RESPONDER_HELLO_SENT:
     state_str = _ ("Hello sent (R)");
     break;
 
   case GNUNET_CORE_KX_STATE_RESPONDER_HELLO_RECEIVED:
     state_str = _ ("Hello received (I)");
     break;
 
   case GNUNET_CORE_KX_STATE_INITIATOR_CONNECTED:
     state_str = _ ("Connected (I)");
     break;
 
   case GNUNET_CORE_KX_STATE_RESPONDER_CONNECTED:
     state_str = _ ("Connected (R)");
     break;
 
   case GNUNET_CORE_KX_STATE_DOWN:
     /* should never happen, as we immediately send the key */
     state_str = _ ("idle");
     break;
 
   case GNUNET_CORE_KX_PEER_DISCONNECT:
     state_str = _ ("disconnected");
     break;
 
   case GNUNET_CORE_KX_ITERATION_FINISHED:
     return;
 
   case GNUNET_CORE_KX_CORE_DISCONNECT:
     fprintf (stderr,
              "%s\n",
              _ ("Connection to CORE service lost (reconnecting)"));
     return;
 
   default:
     state_str = _ ("unknown state");
     break;
   }
   now_str = GNUNET_STRINGS_absolute_time_to_string (now);
   fprintf (stdout,
            _ ("%24s: %-30s %4s (timeout in %6s)\n"),
            now_str,
            state_str,
            GNUNET_i2s (peer),
            GNUNET_STRINGS_relative_time_to_string (
              GNUNET_TIME_absolute_get_remaining (timeout),
              GNUNET_YES));
 }
 
 
 /**
  * Main function that will be run by the scheduler.
  *
  * @param cls closure
  * @param args remaining command-line arguments
  * @param cfgfile name of the configuration file used (for saving, can be NULL!)
  * @param cfg configuration
  */
 static void
 run (void *cls,
      char *const *args,
      const char *cfgfile,
      const struct GNUNET_CONFIGURATION_Handle *cfg)
 {
   (void) cls;
   (void) cfgfile;
 
   if (NULL != args[0])
   {
     fprintf (stderr, _ ("Invalid command line argument `%s'\n"), args[0]);
     return;
   }
   if (! show_conns && ! monitor_connections)
   {
     fprintf (stderr, "%s", _ ("No argument given.\n"));
     ret = 1;
     GNUNET_SCHEDULER_shutdown ();
     return;
   }
   GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
   if (show_conns || monitor_connections)
   {
     if (monitor_connections)
     {
       fprintf (stdout,
                _ ("Monitoring connections. Press CTRL-C to quit.\n\n"));
     }
     mh = GNUNET_CORE_monitor_start (cfg, &monitor_cb, NULL);
     if (NULL == mh)
     {
       fprintf (stderr, "%s", _ ("Failed to connect to CORE service!\n"));
       ret = 1;
       GNUNET_SCHEDULER_shutdown ();
     }
     return;
   }
 }
 
 
 /**
  * The main function to obtain peer information from CORE.
  *
  * @param argc number of arguments from the command line
  * @param argv command line arguments
  * @return 0 ok, 1 on error
  */
 int
 main (int argc, char *const *argv)
 {
   int res;
   struct GNUNET_GETOPT_CommandLineOption options[] =
   { GNUNET_GETOPT_option_flag (
       'm',
       "monitor",
       gettext_noop (
         "provide information about all current connections (continuously)"),
       &monitor_connections),
     GNUNET_GETOPT_option_flag (
       's',
       "connection-status",
       gettext_noop (
         "Show current connections"
         ),
       &show_conns),
     GNUNET_GETOPT_OPTION_END };
 
   res = GNUNET_PROGRAM_run (GNUNET_OS_project_data_gnunet (),
                             argc,
                             argv,
                             "gnunet-core",
                             gettext_noop (
                               "Print information about connected peers."),
                             options,
                             &run,
                             NULL);
 
   if (GNUNET_OK == res)
     return ret;
   return 1;
 }
 
 
 /* end of gnunet-core.c */