/*
     This file is part of GNUnet.
     (C) 2009 Christian Grothoff (and other contributing authors)

     GNUnet is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published
     by the Free Software Foundation; either version 3, 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
     General Public License for more details.

     You should have received a copy of the GNU General Public License
     along with GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
*/
/**
 * @file testing/test_testing_topology.c
 * @brief base testcase for testing all the topologies provided
 */
#include "platform.h"
#include "gnunet_testing_lib.h"
#include "gnunet_core_service.h"
#include "gnunet_os_lib.h"

#define VERBOSE GNUNET_YES

#define DELAY_FOR_LOGGING GNUNET_NO

#define SECONDS_PER_PEER_START 120

#define DEFAULT_NUM_PEERS 4

#define MAX_OUTSTANDING_CONNECTIONS 100

static float fail_percentage = 0.05;

static int ok;

struct GNUNET_TIME_Relative connect_timeout;

static unsigned long long connect_attempts;

static unsigned long long num_peers;

static unsigned int topology_connections;

static unsigned int total_connections;

static unsigned int failed_connections;

static unsigned int total_server_connections;

static unsigned int total_messages_received;

static unsigned int expected_messages;

static unsigned int expected_connections;

static unsigned long long peers_left;

static struct GNUNET_TESTING_PeerGroup *pg;

const struct GNUNET_CONFIGURATION_Handle *main_cfg;

GNUNET_SCHEDULER_TaskIdentifier die_task;

static char *dotOutFileName;

static struct GNUNET_TIME_Relative settle_time;

static FILE *dotOutFile;

static char *topology_string;

static char *blacklist_transports;

static int transmit_ready_scheduled;

static int transmit_ready_failed;

static int transmit_ready_called;

struct GNUNET_TIME_Relative test_timeout;

struct GNUNET_TIME_Relative timeout;

static unsigned int modnum;

static unsigned int dotnum;

static enum GNUNET_TESTING_Topology topology;

static enum GNUNET_TESTING_Topology blacklist_topology = GNUNET_TESTING_TOPOLOGY_NONE;  /* Don't do any blacklisting */

static enum GNUNET_TESTING_Topology connection_topology = GNUNET_TESTING_TOPOLOGY_NONE; /* NONE actually means connect all allowed peers */

static enum GNUNET_TESTING_TopologyOption connect_topology_option =
  GNUNET_TESTING_TOPOLOGY_OPTION_ALL;

static double connect_topology_option_modifier = 0.0;

static char *test_directory;

#define MTYPE 12345

struct GNUNET_TestMessage
{
  /**
   * Header of the message
   */
  struct GNUNET_MessageHeader header;

  /**
   * Unique identifier for this message.
   */
  uint32_t uid;
};

struct TestMessageContext
{
  /* This is a linked list */
  struct TestMessageContext *next;

  /* Handle to the sending peer core */
  struct GNUNET_CORE_Handle *peer1handle;

  /* Handle to the receiving peer core */
  struct GNUNET_CORE_Handle *peer2handle;

  /* Handle to the sending peer daemon */
  struct GNUNET_TESTING_Daemon *peer1;

  /* Handle to the receiving peer daemon */
  struct GNUNET_TESTING_Daemon *peer2;

  /* Identifier for this message, so we don't disconnect other peers! */
  uint32_t uid;

  /* Has peer1 been notified already of a connection to peer2? */
  int peer1notified;

  /* Has the core of peer2 been connected already? */
  int peer2connected;

  /* Task for disconnecting cores, allow task to be cancelled on shutdown */
  GNUNET_SCHEDULER_TaskIdentifier disconnect_task;

};

static struct TestMessageContext *test_messages;

/**
 * Check whether peers successfully shut down.
 */
void
shutdown_callback (void *cls, const char *emsg)
{
  if (emsg != NULL)
    {
#if VERBOSE
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Shutdown of peers failed!\n");
#endif
      if (ok == 0)
        ok = 666;
    }
  else
    {
#if VERBOSE
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "All peers successfully shut down!\n");
#endif
    }
}

#if DELAY_FOR_LOGGING
static void
gather_log_data ()
{
  char *peer_number;
  char *connect_number;
  struct GNUNET_OS_Process *mem_process;
  GNUNET_asprintf (&peer_number, "%llu", num_peers);
  GNUNET_asprintf (&connect_number, "%llu", expected_connections);
  mem_process = GNUNET_OS_start_process (NULL, NULL, "./memsize.pl",
                                         "memsize.pl", "totals.txt",
                                         peer_number, connect_number, NULL);
  GNUNET_OS_process_wait (mem_process);
  GNUNET_OS_process_close (mem_process);
  mem_process = NULL;
}

#endif

static void
finish_testing ()
{
  GNUNET_assert (pg != NULL);
  struct TestMessageContext *pos;
  struct TestMessageContext *free_pos;
#if VERBOSE
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Called finish testing, stopping daemons.\n");
#endif

  pos = test_messages;
  while (pos != NULL)
    {
      if (pos->peer1handle != NULL)
        {
          GNUNET_CORE_disconnect (pos->peer1handle);
          pos->peer1handle = NULL;
        }
      if (pos->peer2handle != NULL)
        {
          GNUNET_CORE_disconnect (pos->peer2handle);
          pos->peer2handle = NULL;
        }
      free_pos = pos;
      pos = pos->next;
      if (free_pos->disconnect_task != GNUNET_SCHEDULER_NO_TASK)
        {
          GNUNET_SCHEDULER_cancel (free_pos->disconnect_task);
        }
      GNUNET_free (free_pos);
    }
#if VERBOSE
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Transmit_ready's scheduled %d, failed %d, transmit_ready's called %d\n",
              transmit_ready_scheduled, transmit_ready_failed,
              transmit_ready_called);
#endif

#if VERBOSE
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Calling daemons_stop\n");
#endif
  GNUNET_TESTING_daemons_stop (pg, timeout, &shutdown_callback, NULL);

  if (dotOutFile != NULL)
    {
      fprintf (dotOutFile, "}");
      fclose (dotOutFile);
    }

  ok = 0;
}


static void
disconnect_cores (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  struct TestMessageContext *pos = cls;

  /* Disconnect from the respective cores */
#if VERBOSE > 1
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Disconnecting from peer 1 `%4s'\n",
              GNUNET_i2s (&pos->peer1->id));
#endif
  if (pos->peer1handle != NULL)
    GNUNET_CORE_disconnect (pos->peer1handle);
#if VERBOSE > 1
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Disconnecting from peer 2 `%4s'\n",
              GNUNET_i2s (&pos->peer2->id));
#endif
  if (pos->peer2handle != NULL)
    GNUNET_CORE_disconnect (pos->peer2handle);
  /* Set handles to NULL so test case can be ended properly */
  pos->peer1handle = NULL;
  pos->peer2handle = NULL;
  pos->disconnect_task = GNUNET_SCHEDULER_NO_TASK;
  /* Decrement total connections so new can be established */
  total_server_connections -= 2;
}


static void
topology_cb (void *cls,
             const struct GNUNET_PeerIdentity *first,
             const struct GNUNET_PeerIdentity *second, const char *emsg)
{
  FILE *outfile = cls;
  if (first != NULL)
    {
      if (outfile != NULL)
        {
          fprintf (outfile, "\t\"%s\" -- ", GNUNET_i2s (first));
          fprintf (outfile, "\"%s\";\n", GNUNET_i2s (second));
        }
      topology_connections++;
    }
  else
    {
      fprintf (stderr,
               "Finished iterating over topology, %d total connections!\n",
               topology_connections);
      if (outfile != NULL)
        {
          fprintf (outfile, "}\n");
          fclose (outfile);
          GNUNET_SCHEDULER_add_now (&finish_testing, NULL);
        }
    }
}

static int
process_mtype (void *cls,
               const struct GNUNET_PeerIdentity *peer,
               const struct GNUNET_MessageHeader *message,
               const struct GNUNET_TRANSPORT_ATS_Information *atsi)
{
  char *dotOutFileNameFinished;
  FILE *dotOutFileFinished;
  struct TestMessageContext *pos = cls;
  struct GNUNET_TestMessage *msg = (struct GNUNET_TestMessage *) message;
  if (pos->uid != ntohl (msg->uid))
    return GNUNET_OK;

#if VERBOSE
  if ((total_messages_received) % modnum == 0)
    {
      if (total_messages_received == 0)
        fprintf (stdout, "0%%");
      else
        fprintf (stdout, "%d%%",
                 (int) (((float) total_messages_received /
                         expected_messages) * 100));

    }
  else if (total_messages_received % dotnum == 0)
    {
      fprintf (stdout, ".");
    }
  fflush (stdout);
#endif

  total_messages_received++;

#if VERBOSE > 1
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Received message from `%4s', type %d.\n", GNUNET_i2s (peer),
              ntohs (message->type));
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Total messages received %d, expected %d.\n",
              total_messages_received, expected_messages);
#endif

  if (total_messages_received == expected_messages)
    {
#if VERBOSE
      fprintf (stdout, "100%%]\n");
#endif
      GNUNET_SCHEDULER_cancel (die_task);
      GNUNET_asprintf (&dotOutFileNameFinished, "%s.dot", "final_topology");
      dotOutFileFinished = fopen (dotOutFileNameFinished, "w");
      GNUNET_free (dotOutFileNameFinished);
      if (dotOutFileFinished != NULL)
        {
          fprintf (dotOutFileFinished, "strict graph G {\n");
        }
      topology_connections = 0;
      GNUNET_TESTING_get_topology (pg, &topology_cb, dotOutFileFinished);
      //GNUNET_SCHEDULER_add_now (&finish_testing, NULL);
    }
  else
    {
      pos->disconnect_task =
        GNUNET_SCHEDULER_add_now (&disconnect_cores, pos);
    }

  return GNUNET_OK;
}

static void
end_badly (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  char *msg = cls;
  GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
              "End badly was called (%s)... stopping daemons.\n", msg);
  struct TestMessageContext *pos;
  struct TestMessageContext *free_pos;

  pos = test_messages;
  while (pos != NULL)
    {
      if (pos->peer1handle != NULL)
        {
          GNUNET_CORE_disconnect (pos->peer1handle);
          pos->peer1handle = NULL;
        }
      if (pos->peer2handle != NULL)
        {
          GNUNET_CORE_disconnect (pos->peer2handle);
          pos->peer2handle = NULL;
        }
      free_pos = pos;
      pos = pos->next;
      GNUNET_free (free_pos);
    }

#if VERBOSE
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Transmit_ready's scheduled %d, failed %d, transmit_ready's called %d\n",
              transmit_ready_scheduled, transmit_ready_failed,
              transmit_ready_called);
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Total messages received %d, expected %d.\n",
              total_messages_received, expected_messages);
#endif

  if (pg != NULL)
    {
      GNUNET_TESTING_daemons_stop (pg, timeout, &shutdown_callback, NULL);
      ok = 7331;                /* Opposite of leet */
    }
  else
    ok = 401;                   /* Never got peers started */

  if (dotOutFile != NULL)
    {
      fprintf (dotOutFile, "}");
      fclose (dotOutFile);
    }
}

static size_t
transmit_ready (void *cls, size_t size, void *buf)
{
  struct GNUNET_TestMessage *m;
  struct TestMessageContext *pos = cls;

  GNUNET_assert (buf != NULL);
  m = (struct GNUNET_TestMessage *) buf;
  m->header.type = htons (MTYPE);
  m->header.size = htons (sizeof (struct GNUNET_TestMessage));
  m->uid = htonl (pos->uid);
  transmit_ready_called++;
#if VERBOSE > 1
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "transmit ready for peer %s\ntransmit_ready's scheduled %d, transmit_ready's called %d\n",
              GNUNET_i2s (&pos->peer1->id), transmit_ready_scheduled,
              transmit_ready_called);
#endif
  return sizeof (struct GNUNET_TestMessage);
}


static struct GNUNET_CORE_MessageHandler no_handlers[] = {
  {NULL, 0, 0}
};

static struct GNUNET_CORE_MessageHandler handlers[] = {
  {&process_mtype, MTYPE, sizeof (struct GNUNET_TestMessage)},
  {NULL, 0, 0}
};

static void
init_notify_peer2 (void *cls,
                   struct GNUNET_CORE_Handle *server,
                   const struct GNUNET_PeerIdentity *my_identity,
                   const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded
                   *publicKey)
{
  struct TestMessageContext *pos = cls;

  total_server_connections++;

  pos->peer2connected = GNUNET_YES;
  if (pos->peer1notified == GNUNET_YES) /* Peer 1 has been notified of connection to peer 2 */
    {
#if VERBOSE > 1
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Scheduling message send to peer `%s' from peer `%s' (init_notify_peer2)\n",
                  GNUNET_i2s (my_identity), GNUNET_h2s(&pos->peer1->id.hashPubKey));
#endif
      if (NULL == GNUNET_CORE_notify_transmit_ready (pos->peer1handle,
                                                     0,
                                                     timeout,
                                                     &pos->peer2->id,
                                                     sizeof (struct
                                                             GNUNET_TestMessage),
                                                     &transmit_ready, pos))
        {
          GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                      "RECEIVED NULL when asking core (1) for transmission to peer `%4s'\n",
                      GNUNET_i2s (&pos->peer2->id));
          transmit_ready_failed++;
        }
      else
        {
          transmit_ready_scheduled++;
        }
    }
}

/**
 * Method called whenever a given peer connects.
 *
 * @param cls closure
 * @param peer peer identity this notification is about
 * @param atsi performance data for the connection
 */
static void connect_notify_peers (void *cls,
                                  const struct
                                  GNUNET_PeerIdentity *peer,
                                  const struct GNUNET_TRANSPORT_ATS_Information *atsi)
{
  struct TestMessageContext *pos = cls;

  if (0 == memcmp(peer, &pos->peer2->id, sizeof(struct GNUNET_PeerIdentity)))
    {
      pos->peer1notified = GNUNET_YES;
#if VERBOSE > 1
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Peer `%s' notified of connection to peer `%s'\n",
                GNUNET_i2s (&pos->peer1->id), GNUNET_h2s(&peer->hashPubKey));
#endif
    }
  else
    return;

  if (pos->peer2connected == GNUNET_YES) /* Already connected and notified of connection, send message! */
    {
#if VERBOSE > 1
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Scheduling message send to peer `%s' from peer `%s' (init_notify_peer2)\n",
                GNUNET_i2s (&pos->peer2->id), GNUNET_h2s(&pos->peer1->id.hashPubKey));
#endif
      if (NULL == GNUNET_CORE_notify_transmit_ready (pos->peer1handle,
                                                     0,
                                                     timeout,
                                                     &pos->peer2->id,
                                                     sizeof (struct
                                                             GNUNET_TestMessage),
                                                     &transmit_ready, pos))
        {
          GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                      "RECEIVED NULL when asking core (1) for transmission to peer `%4s'\n",
                      GNUNET_i2s (&pos->peer2->id));
          transmit_ready_failed++;
        }
      else
        {
          transmit_ready_scheduled++;
        }
    }
}

static void
init_notify_peer1 (void *cls,
                   struct GNUNET_CORE_Handle *server,
                   const struct GNUNET_PeerIdentity *my_identity,
                   const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded
                   *publicKey)
{
  struct TestMessageContext *pos = cls;
  total_server_connections++;

#if VERBOSE > 1
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Core connection to `%4s' established, setting up handles\n",
              GNUNET_i2s (my_identity));
#endif

  /*
   * Connect to the receiving peer
   */
  pos->peer2handle = GNUNET_CORE_connect (pos->peer2->cfg,
                                          1,
                                          pos,
                                          &init_notify_peer2,
                                          NULL,
                                          NULL,
                                          NULL, NULL,
                                          GNUNET_YES, NULL, GNUNET_YES,
                                          handlers);

}


static void
send_test_messages (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  struct TestMessageContext *pos = cls;

  if ((pos == test_messages) && (settle_time.rel_value > 0))
    {
      topology_connections = 0;
      GNUNET_TESTING_get_topology (pg, &topology_cb, NULL);
    }
  if (( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)|| (cls == NULL))
    return;

  if (die_task == GNUNET_SCHEDULER_NO_TASK)
    {
      die_task = GNUNET_SCHEDULER_add_delayed (test_timeout,
                                               &end_badly,
                                               "from send test messages (timeout)");
    }

  if (total_server_connections >= MAX_OUTSTANDING_CONNECTIONS)
    {
      GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
                                    (GNUNET_TIME_UNIT_SECONDS, 1),
                                    &send_test_messages, pos);
      return;                   /* Otherwise we'll double schedule messages here! */
    }

  /*
   * Connect to the sending peer
   */
  pos->peer1handle = GNUNET_CORE_connect (pos->peer1->cfg,
                                          1,
                                          pos,
                                          &init_notify_peer1,
                                          &connect_notify_peers, NULL,
                                          NULL,
                                          NULL,
                                          GNUNET_NO, NULL, GNUNET_NO,
                                          no_handlers);

  GNUNET_assert (pos->peer1handle != NULL);

  if (total_server_connections < MAX_OUTSTANDING_CONNECTIONS)
    {
      GNUNET_SCHEDULER_add_now (&send_test_messages, pos->next);
    }
  else
    {
      GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
                                    (GNUNET_TIME_UNIT_SECONDS, 1),
                                    &send_test_messages, pos->next);
    }
}


void
topology_callback (void *cls,
                   const struct GNUNET_PeerIdentity *first,
                   const struct GNUNET_PeerIdentity *second,
                   uint32_t distance,
                   const struct GNUNET_CONFIGURATION_Handle *first_cfg,
                   const struct GNUNET_CONFIGURATION_Handle *second_cfg,
                   struct GNUNET_TESTING_Daemon *first_daemon,
                   struct GNUNET_TESTING_Daemon *second_daemon,
                   const char *emsg)
{
  struct TestMessageContext *temp_context;
  if (emsg == NULL)
    {
#if VERBOSE
      if ((total_connections) % modnum == 0)
        {
          if (total_connections == 0)
            fprintf (stdout, "0%%");
          else
            fprintf (stdout, "%d%%",
                     (int) (((float) total_connections /
                             expected_connections) * 100));

        }
      else if (total_connections % dotnum == 0)
        {
          fprintf (stdout, ".");
        }
      fflush (stdout);
#endif
      total_connections++;
#if VERBOSE > 1
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "connected peer %s to peer %s\n",
                  first_daemon->shortname, second_daemon->shortname);
#endif
      temp_context = GNUNET_malloc (sizeof (struct TestMessageContext));
      temp_context->peer1 = first_daemon;
      temp_context->peer2 = second_daemon;
      temp_context->next = test_messages;
      temp_context->uid = total_connections;
      temp_context->disconnect_task = GNUNET_SCHEDULER_NO_TASK;
      test_messages = temp_context;

      expected_messages++;
      if (dotOutFile != NULL)
        fprintf (dotOutFile, "\tn%s -- n%s;\n", first_daemon->shortname,
                 second_daemon->shortname);
    }
#if VERBOSE
  else
    {
      failed_connections++;
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Failed to connect peer %s to peer %s with error :\n%s\n",
                  first_daemon->shortname, second_daemon->shortname, emsg);
    }
#endif

  if (total_connections == expected_connections)
    {
#if VERBOSE
      fprintf (stdout, "100%%]\n");
#endif
#if VERBOSE
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Created %d total connections, which is our target number!  Calling send messages.\n",
                  total_connections);
#endif
      modnum = expected_messages / 4;
      dotnum = (expected_messages / 50) + 1;
      GNUNET_SCHEDULER_cancel (die_task);
      die_task = GNUNET_SCHEDULER_NO_TASK;
#if DELAY_FOR_LOGGING
      fprintf (stdout, "Sending test messages in 10 seconds.\n");
      GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
                                    (GNUNET_TIME_UNIT_SECONDS, 10),
                                    &send_test_messages, test_messages);
      gather_log_data ();
#else
      if (settle_time.rel_value > 0)
        {
          GNUNET_TESTING_get_topology (pg, &topology_cb, NULL);
        }
      GNUNET_SCHEDULER_add_delayed (settle_time, &send_test_messages,
                                    test_messages);
#endif
#if VERBOSE
      fprintf (stdout, "Test message progress: [");
#endif

    }
  else if (total_connections + failed_connections == expected_connections)
    {
      if (failed_connections <
          (unsigned int) (fail_percentage * total_connections))
        {
          GNUNET_SCHEDULER_cancel (die_task);
          die_task = GNUNET_SCHEDULER_NO_TASK;
          GNUNET_SCHEDULER_add_now (&send_test_messages, test_messages);
        }
      else
        {
          GNUNET_SCHEDULER_cancel (die_task);
          die_task =
            GNUNET_SCHEDULER_add_now (&end_badly,
                                      "from topology_callback (too many failed connections)");
        }
    }
  else
    {
#if VERBOSE > 1
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Have %d total connections, %d failed connections, Want %d (at least %d)\n",
                  total_connections, failed_connections, expected_connections,
                  expected_connections -
                  (unsigned int) (fail_percentage * expected_connections));
#endif
    }
}

static void
topology_creation_finished (void *cls, const char *emsg)
{
#if VERBOSE
  if (emsg == NULL)
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "All topology connections created successfully!\n");
#endif
}

static void
connect_topology ()
{
  expected_connections = -1;
  if ((pg != NULL) && (peers_left == 0))
    {
      expected_connections =
        GNUNET_TESTING_connect_topology (pg, connection_topology,
                                         connect_topology_option,
                                         connect_topology_option_modifier,
                                         connect_timeout,
                                         connect_attempts,
                                         &topology_creation_finished, NULL);
#if VERBOSE > 1
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Have %d expected connections\n", expected_connections);
#endif
    }

  GNUNET_SCHEDULER_cancel (die_task);
  if (expected_connections == GNUNET_SYSERR)
    {
      die_task =
        GNUNET_SCHEDULER_add_now (&end_badly,
                                  "from connect topology (bad return)");
    }

  die_task = GNUNET_SCHEDULER_add_delayed (test_timeout,
                                           &end_badly,
                                           "from connect topology (timeout)");
  modnum = expected_connections / 4;
  dotnum = (expected_connections / 50) + 1;
#if VERBOSE
  fprintf (stdout, "Peer connection progress: [");
#endif
}

static void
create_topology ()
{
  peers_left = num_peers;       /* Reset counter */
  if (GNUNET_TESTING_create_topology
      (pg, topology, blacklist_topology,
       blacklist_transports) != GNUNET_SYSERR)
    {
#if VERBOSE
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Topology set up, now starting peers!\n");
      fprintf (stdout, "Daemon start progress [");
#endif
      GNUNET_TESTING_daemons_continue_startup (pg);
    }
  else
    {
      GNUNET_SCHEDULER_cancel (die_task);
      die_task =
        GNUNET_SCHEDULER_add_now (&end_badly,
                                  "from create topology (bad return)");
    }
  GNUNET_SCHEDULER_cancel (die_task);
  die_task = GNUNET_SCHEDULER_add_delayed (test_timeout,
                                           &end_badly,
                                           "from continue startup (timeout)");
}


static void
peers_started_callback (void *cls,
                        const struct GNUNET_PeerIdentity *id,
                        const struct GNUNET_CONFIGURATION_Handle *cfg,
                        struct GNUNET_TESTING_Daemon *d, const char *emsg)
{
  if (emsg != NULL)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Failed to start daemon with error: `%s'\n", emsg);
      return;
    }
  GNUNET_assert (id != NULL);
#if VERBOSE > 1
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Started daemon %llu out of %llu\n",
              (num_peers - peers_left) + 1, num_peers);
#endif
#if VERBOSE
  if ((num_peers - peers_left) % modnum == 0)
    {
      if (num_peers - peers_left == 0)
        fprintf (stdout, "0%%");
      else
        fprintf (stdout, "%d%%",
                 (int) (((float) (num_peers - peers_left) /
                         num_peers) * 100));

    }
  else if ((num_peers - peers_left) % dotnum == 0)
    {
      fprintf (stdout, ".");
    }
  fflush (stdout);
#endif
  peers_left--;
  if (peers_left == 0)
    {
#if VERBOSE
      fprintf (stdout, "100%%]\n");
#endif
#if VERBOSE
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "All %d daemons started, now connecting peers!\n",
                  num_peers);
#endif
      GNUNET_SCHEDULER_cancel (die_task);
      /* Set up task in case topology creation doesn't finish
       * within a reasonable amount of time */
      die_task = GNUNET_SCHEDULER_add_delayed (timeout,
                                               &end_badly,
                                               "from peers_started_callback");
#if DELAY_FOR_LOGGING
      fprintf (stdout, "Connecting topology in 10 seconds\n");
      gather_log_data ();
      GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
                                    (GNUNET_TIME_UNIT_SECONDS, 10),
                                    &connect_topology, NULL);
#else
      connect_topology ();
#endif
      ok = 0;
    }
}

/**
 * Callback indicating that the hostkey was created for a peer.
 *
 * @param cls NULL
 * @param id the peer identity
 * @param d the daemon handle (pretty useless at this point, remove?)
 * @param emsg non-null on failure
 */
void
hostkey_callback (void *cls,
                  const struct GNUNET_PeerIdentity *id,
                  struct GNUNET_TESTING_Daemon *d, const char *emsg)
{
  if (emsg != NULL)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Hostkey callback received error: %s\n", emsg);
    }

#if VERBOSE > 1
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Hostkey (%d/%d) created for peer `%s'\n",
              num_peers - peers_left, num_peers, GNUNET_i2s (id));
#endif

#if VERBOSE
  if ((num_peers - peers_left) % modnum == 0)
    {
      if (num_peers - peers_left == 0)
        fprintf (stdout, "0%%");
      else
        fprintf (stdout, "%d%%",
                 (int) (((float) (num_peers - peers_left) /
                         num_peers) * 100));

    }
  else if ((num_peers - peers_left) % dotnum == 0)
    {
      fprintf (stdout, ".");
    }
  fflush (stdout);
#endif
  peers_left--;
  if (peers_left == 0)
    {
#if VERBOSE
      fprintf (stdout, "100%%]\n");
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "All %d hostkeys created, now creating topology!\n",
                  num_peers);
#endif
      GNUNET_SCHEDULER_cancel (die_task);
      /* Set up task in case topology creation doesn't finish
       * within a reasonable amount of time */
      die_task = GNUNET_SCHEDULER_add_delayed (test_timeout,
                                               &end_badly,
                                               "from create_topology");
      GNUNET_SCHEDULER_add_now (&create_topology, NULL);
      ok = 0;
    }
}

static void
run (void *cls,
     char *const *args,
     const char *cfgfile, const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *topology_str;
  char *connect_topology_str;
  char *blacklist_topology_str;
  char *connect_topology_option_str;
  char *connect_topology_option_modifier_string;
  unsigned long long temp_settle;
  ok = 1;

  dotOutFile = fopen (dotOutFileName, "w");
  if (dotOutFile != NULL)
    {
      fprintf (dotOutFile, "strict graph G {\n");
    }

#if VERBOSE
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Starting daemons based on config file %s\n", cfgfile);
#endif

  if (GNUNET_YES !=
      GNUNET_CONFIGURATION_get_value_string (cfg, "paths", "servicehome",
                                             &test_directory))
    {
      ok = 404;
      return;
    }

  if ((GNUNET_YES ==
       GNUNET_CONFIGURATION_get_value_string (cfg, "testing", "topology",
                                              &topology_str))
      && (GNUNET_NO == GNUNET_TESTING_topology_get (&topology, topology_str)))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Invalid topology `%s' given for section %s option %s\n",
                  topology_str, "TESTING", "TOPOLOGY");
      topology = GNUNET_TESTING_TOPOLOGY_CLIQUE;        /* Defaults to NONE, so set better default here */
    }

  if ((GNUNET_YES ==
       GNUNET_CONFIGURATION_get_value_string (cfg, "testing",
                                              "connect_topology",
                                              &connect_topology_str))
      && (GNUNET_NO ==
          GNUNET_TESTING_topology_get (&connection_topology,
                                       connect_topology_str)))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Invalid connect topology `%s' given for section %s option %s\n",
                  connect_topology_str, "TESTING", "CONNECT_TOPOLOGY");
    }
  GNUNET_free_non_null (connect_topology_str);
  if ((GNUNET_YES ==
       GNUNET_CONFIGURATION_get_value_string (cfg, "testing",
                                              "connect_topology_option",
                                              &connect_topology_option_str))
      && (GNUNET_NO ==
          GNUNET_TESTING_topology_option_get (&connect_topology_option,
                                              connect_topology_option_str)))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Invalid connect topology option `%s' given for section %s option %s\n",
                  connect_topology_option_str, "TESTING",
                  "CONNECT_TOPOLOGY_OPTION");
      connect_topology_option = GNUNET_TESTING_TOPOLOGY_OPTION_ALL;     /* Defaults to NONE, set to ALL */
    }
  GNUNET_free_non_null (connect_topology_option_str);
  if (GNUNET_YES ==
      GNUNET_CONFIGURATION_get_value_string (cfg, "testing",
                                             "connect_topology_option_modifier",
                                             &connect_topology_option_modifier_string))
    {
      if (sscanf
          (connect_topology_option_modifier_string, "%lf",
           &connect_topology_option_modifier) != 1)
        {
          GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                      _
                      ("Invalid value `%s' for option `%s' in section `%s': expected float\n"),
                      connect_topology_option_modifier_string,
                      "connect_topology_option_modifier", "TESTING");
        }
      GNUNET_free (connect_topology_option_modifier_string);
    }

  if (GNUNET_YES !=
      GNUNET_CONFIGURATION_get_value_string (cfg, "testing",
                                             "blacklist_transports",
                                             &blacklist_transports))
    blacklist_transports = NULL;

  if ((GNUNET_YES ==
       GNUNET_CONFIGURATION_get_value_string (cfg, "testing",
                                              "blacklist_topology",
                                              &blacklist_topology_str))
      && (GNUNET_NO ==
          GNUNET_TESTING_topology_get (&blacklist_topology,
                                       blacklist_topology_str)))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Invalid topology `%s' given for section %s option %s\n",
                  topology_str, "TESTING", "BLACKLIST_TOPOLOGY");
    }
  GNUNET_free_non_null (topology_str);
  GNUNET_free_non_null (blacklist_topology_str);

  if (GNUNET_OK ==
      GNUNET_CONFIGURATION_get_value_number (cfg, "testing", "settle_time",
                                             &temp_settle))
    settle_time =
      GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, temp_settle);

  if (GNUNET_SYSERR ==
      GNUNET_CONFIGURATION_get_value_number (cfg, "testing", "num_peers",
                                             &num_peers))
    num_peers = DEFAULT_NUM_PEERS;

  if (GNUNET_OK ==
      GNUNET_CONFIGURATION_get_value_number (cfg, "testing", "connect_timeout",
                                             &temp_settle))
    connect_timeout =
      GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, temp_settle);
  else
    {
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Must provide option %s:%s!\n", "testing", "connect_timeout");
      return;
    }


  if (GNUNET_OK !=
        GNUNET_CONFIGURATION_get_value_number (cfg, "testing", "connect_attempts",
                                               &connect_attempts))
    {
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Must provide option %s:%s!\n", "testing", "connect_attempts");
      return;
    }

  main_cfg = cfg;

  peers_left = num_peers;

  /**
   * How long until we fail the whole testcase?
   */
  test_timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, SECONDS_PER_PEER_START), num_peers * 2);

  /**
   * How long until we give up on starting the peers?
   */
  timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, SECONDS_PER_PEER_START), num_peers);

  modnum = num_peers / 4;
  dotnum = (num_peers / 50) + 1;
#if VERBOSE
  fprintf (stdout, "Hostkey generation progress: [");
#endif
  /* Set up a task to end testing if peer start fails */
  die_task =
    GNUNET_SCHEDULER_add_delayed (timeout,
                                  &end_badly,
                                  "didn't generate all hostkeys within a reasonable amount of time!!!");

  GNUNET_assert (num_peers > 0 && num_peers < (unsigned int) -1);
  pg = GNUNET_TESTING_daemons_start (cfg,
                                     peers_left,
                                     peers_left / 2,
                                     peers_left,
                                     timeout,
                                     &hostkey_callback, NULL,
                                     &peers_started_callback, NULL,
                                     &topology_callback, NULL, NULL);

}

static int
check ()
{
  char *binary_name;
  char *config_file_name;
  GNUNET_asprintf (&binary_name, "test-testing-topology-%s", topology_string);
  GNUNET_asprintf (&config_file_name, "test_testing_data_topology_%s.conf",
                   topology_string);
  int ret;
  char *const argv[] = { binary_name,
    "-c",
    config_file_name,
#if VERBOSE
    "-L", "DEBUG",
#endif
    NULL
  };
  struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_OPTION_END
  };
  ret = GNUNET_PROGRAM_run ((sizeof (argv) / sizeof (char *)) - 1,
                            argv, binary_name, "nohelp", options, &run, &ok);
  if (ret != GNUNET_OK)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "`test-testing-topology-%s': Failed with error code %d\n",
                  topology_string, ret);
    }
  GNUNET_free (binary_name);
  GNUNET_free (config_file_name);
  return ok;
}

int
main (int argc, char *argv[])
{
  int ret;
  char *binary_start_pos;
  char *our_binary_name;

  binary_start_pos = rindex (argv[0], '/');
  GNUNET_assert (binary_start_pos != NULL);
  topology_string = strstr (binary_start_pos, "_topology");
  GNUNET_assert (topology_string != NULL);
  topology_string++;
  topology_string = strstr (topology_string, "_");
  GNUNET_assert (topology_string != NULL);
  topology_string++;

  GNUNET_asprintf (&our_binary_name, "test-testing-large-topology_%s",
                   topology_string);
  GNUNET_asprintf (&dotOutFileName, "large_topology_%s.dot", topology_string);

  GNUNET_log_setup (our_binary_name,
#if VERBOSE
                    "DEBUG",
#else
                    "WARNING",
#endif
                    NULL);
  ret = check ();

  /**
   * Need to remove base directory, subdirectories taken care
   * of by the testing framework.
   */
  if (GNUNET_DISK_directory_remove (test_directory) != GNUNET_OK)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Failed to remove testing directory %s\n", test_directory);
    }
  GNUNET_free (our_binary_name);
  return ret;
}

/* end of test_testing_topology.c */