gnunet-ats-solver-eval.c

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/*
   This file is part of GNUnet.
   Copyright (C) 2010-2013 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-solver-eval.h"
#include "gnunet-service-ats_normalization.h"
#include "gnunet-service-ats_preferences.c"

#define BIG_M_STRING "unlimited"

struct GNUNET_STATISTICS_Handle *GSA_stats;


static struct Experiment *e;

static struct LoggingHandle *l;

static struct SolverHandle *sh;

static struct TestPeer *peer_head;

static struct TestPeer *peer_tail;

static double default_properties[GNUNET_ATS_PropertyCount];
static double default_preferences[GNUNET_ATS_PreferenceCount];

static char *opt_exp_file;

static char *opt_solver;

static int opt_log;

static int opt_save;

static int opt_verbose;

static int opt_print;

static int opt_disable_normalization;

static int res;

static void
end_now();


static char *
print_generator_type(enum GeneratorType g)
{
  switch (g)
    {
    case GNUNET_ATS_TEST_TG_CONSTANT:
      return "CONSTANT";

    case GNUNET_ATS_TEST_TG_LINEAR:
      return "LINEAR";

    case GNUNET_ATS_TEST_TG_RANDOM:
      return "RANDOM";

    case GNUNET_ATS_TEST_TG_SINUS:
      return "SINUS";

    default:
      return "INVALID";
      break;
    }
}


static struct TestPeer *
find_peer_by_id(int id)
{
  struct TestPeer *cur;

  for (cur = peer_head; NULL != cur; cur = cur->next)
    if (cur->id == id)
      return cur;
  return NULL;
}

static struct TestPeer *
find_peer_by_pid(const struct GNUNET_PeerIdentity *pid)
{
  struct TestPeer *cur;

  for (cur = peer_head; NULL != cur; cur = cur->next)
    if (0 == GNUNET_memcmp(&cur->peer_id, pid))
      return cur;
  return NULL;
}

static struct TestAddress *
find_address_by_id(struct TestPeer *peer, int aid)
{
  struct TestAddress *cur;

  for (cur = peer->addr_head; NULL != cur; cur = cur->next)
    if (cur->aid == aid)
      return cur;
  return NULL;
}


void
GNUNET_ATS_solver_logging_now(struct LoggingHandle *l)
{
  struct LoggingTimeStep *lts;
  struct TestPeer *cur;
  struct TestAddress *cur_addr;
  struct LoggingPeer *log_p;
  struct LoggingAddress *log_a;
  int c;

  lts = GNUNET_new(struct LoggingTimeStep);
  GNUNET_CONTAINER_DLL_insert_tail(l->head, l->tail, lts);
  lts->timestamp = GNUNET_TIME_absolute_get();
  if (NULL == lts->prev)
    lts->delta = GNUNET_TIME_UNIT_ZERO;
  else
    lts->delta = GNUNET_TIME_absolute_get_duration(lts->prev->timestamp);

  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Logging %llu, delta %llu\n",
             lts->timestamp.abs_value_us, lts->delta.rel_value_us);


  /* Store logging data here */
  for (cur = peer_head; NULL != cur; cur = cur->next)
    {
      GNUNET_log(GNUNET_ERROR_TYPE_INFO,
                 "Logging peer id %llu\n", cur->id);

      log_p = GNUNET_new(struct LoggingPeer);
      log_p->id = cur->id;
      log_p->peer_id = cur->peer_id;
      log_p->is_requested = cur->is_requested;
      for (c = 0; c < GNUNET_ATS_PreferenceCount; c++)
        {
          log_p->pref_abs[c] = cur->pref_abs[c];
          log_p->pref_norm[c] = cur->pref_norm[c];
          GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                     "\t %s = %.2f %.2f [abs/rel]\n",
                     GNUNET_ATS_print_preference_type(c),
                     log_p->pref_abs[c], log_p->pref_norm[c]);
        }
      GNUNET_CONTAINER_DLL_insert_tail(lts->head, lts->tail, log_p);

      for (cur_addr = cur->addr_head; NULL != cur_addr; cur_addr = cur_addr->next)
        {
          GNUNET_log(GNUNET_ERROR_TYPE_INFO,
                     "Logging peer id %llu address %llu\n",
                     cur->id, cur_addr->aid);
          log_a = GNUNET_new(struct LoggingAddress);
          log_a->aid = cur_addr->aid;
          log_a->active = cur_addr->ats_addr->active;
          log_a->network = cur_addr->network;
          log_a->assigned_bw_in = cur_addr->ats_addr->assigned_bw_in;
          log_a->assigned_bw_out = cur_addr->ats_addr->assigned_bw_out;
          for (c = 0; c < GNUNET_ATS_PropertyCount; c++)
            {
              log_a->prop_abs[c] = cur_addr->prop_abs[c];
              log_a->prop_norm[c] = cur_addr->prop_norm[c];
              GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                         "\t %s = %.2f %.2f [abs/rel]\n",
                         GNUNET_ATS_print_property_type(c),
                         log_a->prop_abs[c],
                         log_a->prop_norm[c]);
            }
          GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "\t Active = %i\n", log_a->active);
          GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "\t BW in = %llu\n", log_a->assigned_bw_in);
          GNUNET_log(GNUNET_ERROR_TYPE_INFO, "\t BW out = %llu\n", log_a->assigned_bw_out);

          GNUNET_CONTAINER_DLL_insert_tail(log_p->addr_head, log_p->addr_tail, log_a);
        }
    }
}


static void
logging_task(void *cls)
{
  struct LoggingHandle *l = cls;

  l->logging_task = NULL;
  GNUNET_ATS_solver_logging_now(l);
  l->logging_task = GNUNET_SCHEDULER_add_delayed(l->log_freq,
                                                 &logging_task,
                                                 l);
}

struct LoggingHandle *
GNUNET_ATS_solver_logging_start(struct GNUNET_TIME_Relative freq)
{
  struct LoggingHandle *l;

  l = GNUNET_new(struct LoggingHandle);

  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Start logging every  %s\n",
             GNUNET_STRINGS_relative_time_to_string(freq, GNUNET_NO));
  l->log_freq = freq;
  l->logging_task = GNUNET_SCHEDULER_add_now(&logging_task, l);
  return l;
}

void
GNUNET_ATS_solver_logging_stop(struct LoggingHandle *l)
{
  if (NULL != l->logging_task)
    GNUNET_SCHEDULER_cancel(l->logging_task);

  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Stop logging\n");

  l->logging_task = NULL;
}

static struct LoggingFileHandle *
find_logging_file_handle(struct LoggingFileHandle *lf_head,
                         struct LoggingFileHandle *lf_tail,
                         int peer_id, int address_id)
{
  struct LoggingFileHandle *res;

  for (res = lf_head; NULL != res; res = res->next)
    if ((res->pid == peer_id) && (res->aid == address_id))
      return res;
  return NULL;
}

void
GNUNET_ATS_solver_logging_write_to_disk(struct LoggingHandle *l, int add_time_stamp,
                                        char *output_dir)
{
  struct LoggingTimeStep *lts;
  struct LoggingPeer *log_p;
  struct LoggingAddress *log_a;
  struct LoggingFileHandle *lf_head;
  struct LoggingFileHandle *lf_tail;
  struct LoggingFileHandle *cur;
  struct LoggingFileHandle *next;
  char * filename;
  char * datastring;
  char * propstring;
  char * propstring_tmp;
  char * prefstring;
  char * prefstring_tmp;
  int c;
  int use_dir;

  use_dir = GNUNET_NO;
  if (NULL != output_dir)
    {
      if (GNUNET_OK != GNUNET_DISK_directory_create_for_file(output_dir))
        {
          fprintf(stderr, "Failed to create directory `%s'\n", output_dir);
          return;
        }
      else
        {
          fprintf(stderr, "Created directory `%s'\n", output_dir);
          use_dir = GNUNET_YES;
        }
    }

  lf_head = NULL;
  lf_tail = NULL;

  for (lts = l->head; NULL != lts; lts = lts->next)
    {
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Writing log step %llu\n",
                 (long long unsigned int)lts->timestamp.abs_value_us);

      for (log_p = lts->head; NULL != log_p; log_p = log_p->next)
        {
          for (log_a = log_p->addr_head; NULL != log_a; log_a = log_a->next)
            {
              cur = find_logging_file_handle(lf_head, lf_tail, log_p->id,
                                             log_a->aid);
              if (NULL == cur)
                {
                  cur = GNUNET_new(struct LoggingFileHandle);
                  cur->aid = log_a->aid;
                  cur->pid = log_p->id;

                  if (GNUNET_YES == add_time_stamp)
                    GNUNET_asprintf(&filename, "%s%s%s_%s_p%u_a%u_%llu.log",
                                    (GNUNET_YES == use_dir) ? output_dir : "",
                                    (GNUNET_YES == use_dir) ? DIR_SEPARATOR_STR : "",
                                    e->log_prefix,
                                    opt_solver,
                                    cur->pid,
                                    cur->aid,
                                    l->head->timestamp.abs_value_us);
                  else
                    GNUNET_asprintf(&filename, "%s%s%s_%s_p%u_a%u.log",
                                    (GNUNET_YES == use_dir) ? output_dir : "",
                                    (GNUNET_YES == use_dir) ? DIR_SEPARATOR_STR : "",
                                    e->log_prefix,
                                    opt_solver,
                                    cur->pid,
                                    cur->aid);

                  fprintf(stderr, "Add writing log data for peer %llu address %llu to file `%s'\n",
                          cur->pid, cur->aid, filename);


                  cur->f_hd = GNUNET_DISK_file_open(filename,
                                                    GNUNET_DISK_OPEN_READWRITE |
                                                    GNUNET_DISK_OPEN_CREATE |
                                                    GNUNET_DISK_OPEN_TRUNCATE,
                                                    GNUNET_DISK_PERM_USER_READ |
                                                    GNUNET_DISK_PERM_USER_WRITE |
                                                    GNUNET_DISK_PERM_GROUP_READ |
                                                    GNUNET_DISK_PERM_OTHER_READ);
                  if (NULL == cur->f_hd)
                    {
                      fprintf(stderr, "Cannot open `%s' to write log data!\n", filename);
                      GNUNET_free(filename);
                      GNUNET_free(cur);
                      goto cleanup;
                    }
                  GNUNET_free(filename);
                  GNUNET_CONTAINER_DLL_insert(lf_head, lf_tail, cur);

                  GNUNET_asprintf(&datastring, "#time delta;log duration;peer_requested;addr net; addr_active; bw in; bw out; " \
                                  "UTILIZATION_UP [abs/rel]; UTILIZATION_UP; UTILIZATION_DOWN; UTILIZATION_DOWN; " \
                                  "UTILIZATION_PAYLOAD_UP; UTILIZATION_PAYLOAD_UP; UTILIZATION_PAYLOAD_DOWN; UTILIZATION_PAYLOAD_DOWN;" \
                                  "DELAY; DELAY; " \
                                  "DISTANCE ;DISTANCE ; COST_WAN; COST_WAN; COST_LAN; COST_LAN; " \
                                  "COST_WLAN; COST_WLAN;COST_BT; COST_BT; PREF BW abs; PREF BW rel; PREF LATENCY abs; PREF LATENCY rel;\n");
                  GNUNET_DISK_file_write(cur->f_hd, datastring, strlen(datastring));
                  GNUNET_free(datastring);
                }

              prefstring = GNUNET_strdup("");
              for (c = 1; c < GNUNET_ATS_PreferenceCount; c++)
                {
                  /*
                     fprintf(stderr,"\t %s = %.2f %.2f [abs/rel]\n",
                      GNUNET_ATS_print_preference_type(c),
                      log_p->pref_abs[c], log_p->pref_norm[c]);
                   */
                  GNUNET_asprintf(&prefstring_tmp, "%s;%.3f;%.3f",
                                  prefstring, log_p->pref_abs[c], log_p->pref_norm[c]);


                  GNUNET_free(prefstring);
                  prefstring = GNUNET_strdup(prefstring_tmp);
                  GNUNET_free(prefstring_tmp);
                }


              propstring = GNUNET_strdup("");
              for (c = 1; c < GNUNET_ATS_PropertyCount; c++)
                {
                  if (GNUNET_ATS_NETWORK_TYPE == c)
                    continue;
                  /*
                     fprintf(stderr, "\t %s = %.2f %.2f [abs/rel]\n",
                      GNUNET_ATS_print_property_type(c),
                      log_a->prop_abs[c], log_a->prop_norm[c]);*/
                  GNUNET_asprintf(&propstring_tmp, "%s%.3f;%.3f;",
                                  propstring,
                                  log_a->prop_abs[c],
                                  log_a->prop_norm[c]);
                  GNUNET_free(propstring);
                  propstring = GNUNET_strdup(propstring_tmp);
                  GNUNET_free(propstring_tmp);
                }
              GNUNET_asprintf(&datastring, "%llu;%llu;%u;%u;%i;%u;%u;%s;%s\n",
                              GNUNET_TIME_absolute_get_difference(l->head->timestamp,
                                                                  lts->timestamp).rel_value_us / 1000, lts->delta,
                              log_p->is_requested, log_a->network, log_a->active,
                              log_a->assigned_bw_in, log_a->assigned_bw_out, propstring,
                              prefstring);

              GNUNET_DISK_file_write(cur->f_hd, datastring, strlen(datastring));
              GNUNET_free(datastring);
              GNUNET_free(prefstring);
              GNUNET_free(propstring);
            }
        }
    }

cleanup:
  next = lf_head;
  for (cur = next; NULL != cur; cur = next)
    {
      next = cur->next;
      GNUNET_CONTAINER_DLL_remove(lf_head, lf_tail, cur);
      if (NULL != cur->f_hd)
        GNUNET_DISK_file_close(cur->f_hd);
      GNUNET_free(cur);
    }
}

void
GNUNET_ATS_solver_logging_eval(struct LoggingHandle *l)
{
  struct LoggingTimeStep *lts;
  struct LoggingPeer *log_p;
  struct LoggingAddress *log_a;
  int c;

  for (lts = l->head; NULL != lts; lts = lts->next)
    {
      fprintf(stderr, "Log step %llu %llu: \n",
              (long long unsigned int)lts->timestamp.abs_value_us,
              (long long unsigned int)lts->delta.rel_value_us);

      for (log_p = lts->head; NULL != log_p; log_p = log_p->next)
        {
          fprintf(stderr, "\tLogging peer pid %llu\n", log_p->id);
          for (c = 1; c < GNUNET_ATS_PreferenceCount; c++)
            {
              fprintf(stderr, "\t %s = %.2f %.2f [abs/rel]\n",
                      GNUNET_ATS_print_preference_type(c),
                      log_p->pref_abs[c], log_p->pref_norm[c]);
            }

          for (log_a = log_p->addr_head; NULL != log_a; log_a = log_a->next)
            {
              fprintf(stderr, "\tPeer pid %llu address %llu: %u %u %u\n",
                      log_p->id, log_a->aid, log_a->active,
                      log_a->assigned_bw_in,
                      log_a->assigned_bw_out);

              for (c = 1; c < GNUNET_ATS_PropertyCount; c++)
                {
                  if (GNUNET_ATS_NETWORK_TYPE == c)
                    continue;
                  fprintf(stderr, "\t %s = %.2f %.2f [abs/rel]\n",
                          GNUNET_ATS_print_property_type(c),
                          log_a->prop_abs[c], log_a->prop_norm[c]);
                }
            }
        }
    }
}

void
GNUNET_ATS_solver_logging_free(struct LoggingHandle *l)
{
  struct LoggingTimeStep *lts_cur;
  struct LoggingTimeStep *lts_next;
  struct LoggingPeer *log_p_cur;
  struct LoggingPeer *log_p_next;
  struct LoggingAddress *log_a_cur;
  struct LoggingAddress *log_a_next;

  if (NULL != l->logging_task)
    GNUNET_SCHEDULER_cancel(l->logging_task);
  l->logging_task = NULL;

  lts_next = l->head;
  while (NULL != (lts_cur = lts_next))
    {
      lts_next = lts_cur->next;

      log_p_next = lts_cur->head;
      while (NULL != (log_p_cur = log_p_next))
        {
          log_p_next = log_p_cur->next;

          log_a_next = log_p_cur->addr_head;
          while (NULL != (log_a_cur = log_a_next))
            {
              log_a_next = log_a_cur->next;

              GNUNET_CONTAINER_DLL_remove(log_p_cur->addr_head, log_p_cur->addr_tail, log_a_cur);
              GNUNET_free(log_a_cur);
            }

          GNUNET_CONTAINER_DLL_remove(lts_cur->head, lts_cur->tail, log_p_cur);
          GNUNET_free(log_p_cur);
        }

      GNUNET_CONTAINER_DLL_remove(l->head, l->tail, lts_cur);
      GNUNET_free(lts_cur);
    }

  GNUNET_free(l);
}

static struct PropertyGenerator *prop_gen_head;
static struct PropertyGenerator *prop_gen_tail;


static double
get_property(struct PropertyGenerator *pg)
{
  struct GNUNET_TIME_Relative time_delta;
  double delta_value;
  double pref_value;

  /* Calculate the current preference value */
  switch (pg->type)
    {
    case GNUNET_ATS_TEST_TG_CONSTANT:
      pref_value = pg->base_value;
      break;

    case GNUNET_ATS_TEST_TG_LINEAR:
      time_delta = GNUNET_TIME_absolute_get_duration(pg->time_start);
      /* Calculate point of time in the current period */
      time_delta.rel_value_us = time_delta.rel_value_us %
                                pg->duration_period.rel_value_us;
      delta_value = ((double)time_delta.rel_value_us /
                     pg->duration_period.rel_value_us) * (pg->max_value - pg->base_value);
      if ((pg->max_value < pg->base_value) &&
          ((pg->max_value - pg->base_value) > pg->base_value))
        {
          /* This will cause an underflow */
          GNUNET_break(0);
        }
      pref_value = pg->base_value + delta_value;
      break;

    case GNUNET_ATS_TEST_TG_RANDOM:
      delta_value = (double)GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK,
                                                     10000 * (pg->max_value - pg->base_value)) / 10000;
      pref_value = pg->base_value + delta_value;
      break;

    case GNUNET_ATS_TEST_TG_SINUS:
      time_delta = GNUNET_TIME_absolute_get_duration(pg->time_start);
      /* Calculate point of time in the current period */
      time_delta.rel_value_us = time_delta.rel_value_us %
                                pg->duration_period.rel_value_us;
      if ((pg->max_value - pg->base_value) > pg->base_value)
        {
          /* This will cause an underflow for second half of sinus period,
           * will be detected in general when experiments are loaded */
          GNUNET_break(0);
        }
      delta_value = (pg->max_value - pg->base_value) *
                    sin((2 * M_PI) / ((double)pg->duration_period.rel_value_us) *
                        time_delta.rel_value_us);
      pref_value = pg->base_value + delta_value;
      break;

    default:
      pref_value = 0.0;
      break;
    }
  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Current property value is %f\n",
             pref_value);
  return pref_value;
}


static void
set_prop_task(void *cls)
{
  struct PropertyGenerator *pg = cls;
  struct TestPeer *p;
  struct TestAddress *a;
  double prop_value;
  struct GNUNET_ATS_Information atsi;

  pg->set_task = NULL;

  if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains_value(sh->addresses,
                                                                &pg->test_peer->peer_id, pg->test_address->ats_addr))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Setting property generation for unknown address [%u:%u]\n",
                 pg->peer, pg->address_id);
      return;
    }
  if (NULL == (p = find_peer_by_id(pg->peer)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Setting property generation for unknown peer %u\n",
                 pg->peer);
      return;
    }
  if (NULL == (a = find_address_by_id(p, pg->address_id)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Setting property generation for unknown peer %u\n",
                 pg->peer);
      return;
    }

  prop_value = get_property(pg);
  a->prop_abs[pg->ats_property] = prop_value;

  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Setting property for peer [%u] address [%u] for %s to %f\n",
             pg->peer, pg->address_id,
             GNUNET_ATS_print_property_type(pg->ats_property), prop_value);

  atsi.type = htonl(pg->ats_property);
  atsi.value = htonl((uint32_t)prop_value);

  /* set performance here! */
  sh->sf->s_bulk_start(sh->sf->cls);
  if (GNUNET_YES == opt_disable_normalization)
    {
      a->prop_abs[pg->ats_property] = prop_value;
      a->prop_norm[pg->ats_property] = prop_value;
      sh->sf->s_address_update_property(sh->sf->cls, a->ats_addr,
                                        pg->ats_property, prop_value, prop_value);
    }
  else
    GAS_normalization_update_property(pg->test_address->ats_addr, &atsi, 1);
  sh->sf->s_bulk_stop(sh->sf->cls);

  pg->set_task = GNUNET_SCHEDULER_add_delayed(pg->frequency,
                                              &set_prop_task, pg);
}


static struct PropertyGenerator *
find_prop_gen(unsigned int peer, unsigned int address,
              uint32_t ats_property)
{
  struct PropertyGenerator *cur;

  for (cur = prop_gen_head; NULL != cur; cur = cur->next)
    if ((cur->peer == peer) && (cur->address_id == address))
      {
        if ((cur->ats_property == ats_property) || (0 == ats_property))
          return cur;
      }
  return NULL;
}

void
GNUNET_ATS_solver_generate_property_stop(struct PropertyGenerator *pg)
{
  GNUNET_CONTAINER_DLL_remove(prop_gen_head, prop_gen_tail, pg);

  if (NULL != pg->set_task)
    {
      GNUNET_SCHEDULER_cancel(pg->set_task);
      pg->set_task = NULL;
    }
  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Removing old up preference generator peer [%u] address [%u] `%s'\n",
             pg->peer, pg->address_id,
             GNUNET_ATS_print_property_type(pg->ats_property));

  GNUNET_free(pg);
}


struct PropertyGenerator *
GNUNET_ATS_solver_generate_property_start(unsigned int peer,
                                          unsigned int address_id,
                                          struct TestPeer *test_peer,
                                          struct TestAddress *test_address,
                                          enum GeneratorType type,
                                          long int base_value,
                                          long int value_rate,
                                          struct GNUNET_TIME_Relative period,
                                          struct GNUNET_TIME_Relative frequency,
                                          uint32_t ats_property)
{
  struct PropertyGenerator *pg;

  pg = GNUNET_new(struct PropertyGenerator);
  GNUNET_CONTAINER_DLL_insert(prop_gen_head, prop_gen_tail, pg);
  pg->type = type;
  pg->peer = peer;
  pg->test_address = test_address;
  pg->test_peer = test_peer;
  pg->address_id = address_id;
  pg->ats_property = ats_property;
  pg->base_value = base_value;
  pg->max_value = value_rate;
  pg->duration_period = period;
  pg->frequency = frequency;
  pg->time_start = GNUNET_TIME_absolute_get();

  switch (type)
    {
    case GNUNET_ATS_TEST_TG_CONSTANT:
      GNUNET_log(GNUNET_ERROR_TYPE_INFO,
                 "Setting up %s property generator peer [%u] address [%u] `%s'" \
                 "max %u Bips\n",
                 print_generator_type(type), pg->peer, pg->address_id,
                 GNUNET_ATS_print_property_type(ats_property),
                 base_value);
      break;

    case GNUNET_ATS_TEST_TG_LINEAR:
      GNUNET_log(GNUNET_ERROR_TYPE_INFO,
                 "Setting up %s property generator peer [%u] address [%u] `%s' " \
                 "min %u Bips max %u Bips\n",
                 print_generator_type(type), pg->peer, pg->address_id,
                 GNUNET_ATS_print_property_type(ats_property),
                 base_value, value_rate);
      break;

    case GNUNET_ATS_TEST_TG_SINUS:
      GNUNET_log(GNUNET_ERROR_TYPE_INFO,
                 "Setting up %s property generator peer [%u] address [%u] `%s' " \
                 "baserate %u Bips, amplitude %u Bps\n",
                 print_generator_type(type), pg->peer, pg->address_id,
                 GNUNET_ATS_print_property_type(ats_property),
                 base_value, value_rate);
      break;

    case GNUNET_ATS_TEST_TG_RANDOM:
      GNUNET_log(GNUNET_ERROR_TYPE_INFO,
                 "Setting up %s property generator peer [%u] address [%u] `%s' " \
                 "min %u Bips max %u Bps\n",
                 print_generator_type(type), pg->peer, pg->address_id,
                 GNUNET_ATS_print_property_type(ats_property),
                 base_value, value_rate);
      break;

    default:
      break;
    }

  pg->set_task = GNUNET_SCHEDULER_add_now(&set_prop_task, pg);
  return pg;
}


void
GNUNET_ATS_solver_generate_property_stop_all()
{
  struct PropertyGenerator *cur;
  struct PropertyGenerator *next;

  next = prop_gen_head;
  for (cur = next; NULL != cur; cur = next)
    {
      next = cur->next;
      GNUNET_ATS_solver_generate_property_stop(cur);
    }
}


static struct PreferenceGenerator *pref_gen_head;
static struct PreferenceGenerator *pref_gen_tail;


static double
get_preference(struct PreferenceGenerator *pg)
{
  struct GNUNET_TIME_Relative time_delta;
  double delta_value;
  double pref_value;

  /* Calculate the current preference value */
  switch (pg->type)
    {
    case GNUNET_ATS_TEST_TG_CONSTANT:
      pref_value = pg->base_value;
      break;

    case GNUNET_ATS_TEST_TG_LINEAR:
      time_delta = GNUNET_TIME_absolute_get_duration(pg->time_start);
      /* Calculate point of time in the current period */
      time_delta.rel_value_us = time_delta.rel_value_us %
                                pg->duration_period.rel_value_us;
      delta_value = ((double)time_delta.rel_value_us /
                     pg->duration_period.rel_value_us) * (pg->max_value - pg->base_value);
      if ((pg->max_value < pg->base_value) &&
          ((pg->max_value - pg->base_value) > pg->base_value))
        {
          /* This will cause an underflow */
          GNUNET_break(0);
        }
      pref_value = pg->base_value + delta_value;
      break;

    case GNUNET_ATS_TEST_TG_RANDOM:
      delta_value = (double)GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK,
                                                     10000 * (pg->max_value - pg->base_value)) / 10000;
      pref_value = pg->base_value + delta_value;
      break;

    case GNUNET_ATS_TEST_TG_SINUS:
      time_delta = GNUNET_TIME_absolute_get_duration(pg->time_start);
      /* Calculate point of time in the current period */
      time_delta.rel_value_us = time_delta.rel_value_us %
                                pg->duration_period.rel_value_us;
      if ((pg->max_value - pg->base_value) > pg->base_value)
        {
          /* This will cause an underflow for second half of sinus period,
           * will be detected in general when experiments are loaded */
          GNUNET_break(0);
        }
      delta_value = (pg->max_value - pg->base_value) *
                    sin((2 * M_PI) / ((double)pg->duration_period.rel_value_us) *
                        time_delta.rel_value_us);
      pref_value = pg->base_value + delta_value;
      break;

    default:
      pref_value = 0.0;
      break;
    }
  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Current preference value is %f\n",
             pref_value);
  return pref_value;
}


static void
set_feedback_task(void *cls)
{
  struct PreferenceGenerator *pg = cls;
  struct TestPeer *p;
  double feedback;
  uint32_t bw_acc_out;
  uint32_t bw_acc_in;
  uint32_t delay_acc_in;
  struct GNUNET_TIME_Relative dur;
  double p_new;

  pg->feedback_task = NULL;

  if (NULL == (p = find_peer_by_id(pg->peer)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Setting feedback for unknown peer %u\n", pg->peer);
      return;
    }

  switch (pg->kind)
    {
    case GNUNET_ATS_PREFERENCE_BANDWIDTH:
      dur = GNUNET_TIME_absolute_get_duration(pg->feedback_last_bw_update);
      bw_acc_in = dur.rel_value_us * pg->last_assigned_bw_in + pg->feedback_bw_in_acc;
      pg->feedback_bw_in_acc = 0;

      bw_acc_out = dur.rel_value_us * pg->last_assigned_bw_out + pg->feedback_bw_out_acc;
      p_new = get_preference(pg);
      feedback = (p_new / pg->pref_bw_old) * (bw_acc_in + bw_acc_out) /
                 (2 * GNUNET_TIME_absolute_get_duration(pg->feedback_last).rel_value_us);

      break;

    case GNUNET_ATS_PREFERENCE_LATENCY:
      dur = GNUNET_TIME_absolute_get_duration(pg->feedback_last_delay_update);
      delay_acc_in = dur.rel_value_us * pg->last_delay_value + pg->feedback_delay_acc;
      pg->feedback_delay_acc = 0;

      p_new = get_preference(pg);
      feedback = (p_new / pg->pref_latency_old) * (delay_acc_in) /
                 (GNUNET_TIME_absolute_get_duration(pg->feedback_last).rel_value_us);

      break;

    default:
      GNUNET_break(0);
      feedback = 0.0;
      break;
    }
  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Giving feedback for peer [%u] for client %p pref %s of %.3f\n",
             pg->peer, NULL + (pg->client_id),
             GNUNET_ATS_print_preference_type(pg->kind),
             feedback);

  sh->sf->s_feedback(sh->sf->cls, NULL + (pg->client_id), &p->peer_id,
                     pg->feedback_frequency, pg->kind, feedback);
  pg->feedback_last = GNUNET_TIME_absolute_get();


  pg->feedback_bw_out_acc = 0;
  pg->feedback_bw_in_acc = 0;
  pg->feedback_last_bw_update = GNUNET_TIME_absolute_get();

  pg->feedback_delay_acc = 0;
  pg->feedback_last_delay_update = GNUNET_TIME_absolute_get();


  pg->feedback_task = GNUNET_SCHEDULER_add_delayed(pg->feedback_frequency,
                                                   &set_feedback_task, pg);
}


static void
set_pref_task(void *cls)
{
  struct PreferenceGenerator *pg = cls;
  struct TestPeer *p;
  double pref_value;

  pg->set_task = NULL;

  if (NULL == (p = find_peer_by_id(pg->peer)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Setting preference for unknown peer %u\n", pg->peer);
      return;
    }

  pref_value = get_preference(pg);
  switch (pg->kind)
    {
    case GNUNET_ATS_PREFERENCE_BANDWIDTH:
      pg->pref_bw_old = pref_value;
      break;

    case GNUNET_ATS_PREFERENCE_LATENCY:
      pg->pref_latency_old = pref_value;
      break;

    default:
      break;
    }

  p->pref_abs[pg->kind] = pref_value;

  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Setting preference for peer [%u] for client %p pref %s to %f\n",
             pg->peer, NULL + (pg->client_id),
             GNUNET_ATS_print_preference_type(pg->kind), pref_value);

  if (GNUNET_YES == opt_disable_normalization)
    {
      p->pref_abs[pg->kind] = pref_value;
      p->pref_norm[pg->kind] = pref_value;
      sh->sf->s_pref(sh->sf->cls, &p->peer_id, pg->kind, pref_value);
    }
  else
    update_preference(NULL + (pg->client_id),
                      &p->peer_id,
                      pg->kind,
                      pref_value);

  pg->set_task = GNUNET_SCHEDULER_add_delayed(pg->frequency,
                                              &set_pref_task,
                                              pg);
}


static struct PreferenceGenerator *
find_pref_gen(unsigned int peer, enum GNUNET_ATS_PreferenceKind kind)
{
  struct PreferenceGenerator *cur;

  for (cur = pref_gen_head; NULL != cur; cur = cur->next)
    if (cur->peer == peer)
      {
        if ((cur->kind == kind) || (GNUNET_ATS_PREFERENCE_END == kind))
          return cur;
      }
  return NULL;
}

void
GNUNET_ATS_solver_generate_preferences_stop(struct PreferenceGenerator *pg)
{
  GNUNET_CONTAINER_DLL_remove(pref_gen_head, pref_gen_tail, pg);

  if (NULL != pg->feedback_task)
    {
      GNUNET_SCHEDULER_cancel(pg->feedback_task);
      pg->feedback_task = NULL;
    }

  if (NULL != pg->set_task)
    {
      GNUNET_SCHEDULER_cancel(pg->set_task);
      pg->set_task = NULL;
    }
  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Removing old up preference generator peer [%u] `%s'\n",
             pg->peer, GNUNET_ATS_print_preference_type(pg->kind));

  GNUNET_free(pg);
}


static struct TestAddress*
find_active_address(struct TestPeer *p)
{
  struct TestAddress *cur;

  for (cur = p->addr_head; NULL != cur; cur = cur->next)
    if (GNUNET_YES == cur->ats_addr->active)
      return cur;
  return NULL;
}


struct PreferenceGenerator *
GNUNET_ATS_solver_generate_preferences_start(unsigned int peer,
                                             unsigned int address_id,
                                             unsigned int client_id,
                                             enum GeneratorType type,
                                             long int base_value,
                                             long int value_rate,
                                             struct GNUNET_TIME_Relative period,
                                             struct GNUNET_TIME_Relative frequency,
                                             enum GNUNET_ATS_PreferenceKind kind,
                                             struct GNUNET_TIME_Relative feedback_frequency)
{
  struct PreferenceGenerator *pg;
  struct TestPeer *p;

  if (NULL == (p = find_peer_by_id(peer)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Starting preference for unknown peer %u\n", peer);
      return NULL;
    }

  pg = GNUNET_new(struct PreferenceGenerator);
  GNUNET_CONTAINER_DLL_insert(pref_gen_head, pref_gen_tail, pg);
  pg->type = type;
  pg->peer = peer;
  pg->client_id = client_id;
  pg->kind = kind;
  pg->base_value = base_value;
  pg->max_value = value_rate;
  pg->duration_period = period;
  pg->frequency = frequency;
  pg->time_start = GNUNET_TIME_absolute_get();
  pg->feedback_frequency = feedback_frequency;

  switch (type)
    {
    case GNUNET_ATS_TEST_TG_CONSTANT:
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Setting up %s preference generator peer [%u] `%s' max %u Bips\n",
                 print_generator_type(type), pg->peer,
                 GNUNET_ATS_print_preference_type(kind),
                 base_value);
      break;

    case GNUNET_ATS_TEST_TG_LINEAR:
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Setting up %s preference generator peer [%u] `%s' min %u Bips max %u Bips\n",
                 print_generator_type(type), pg->peer, GNUNET_ATS_print_preference_type(kind),
                 base_value, value_rate);
      break;

    case GNUNET_ATS_TEST_TG_SINUS:
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Setting up %s preference generator peer [%u] `%s' baserate %u Bips, amplitude %u Bps\n",
                 print_generator_type(type), pg->peer, GNUNET_ATS_print_preference_type(kind),
                 base_value, value_rate);
      break;

    case GNUNET_ATS_TEST_TG_RANDOM:
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Setting up %s preference generator peer [%u] `%s' min %u Bips max %u Bps\n",
                 print_generator_type(type), pg->peer, GNUNET_ATS_print_preference_type(kind),
                 base_value, value_rate);
      break;

    default:
      break;
    }

  pg->set_task = GNUNET_SCHEDULER_add_now(&set_pref_task, pg);
  if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us != feedback_frequency.rel_value_us)
    {
      struct TestAddress * addr = find_active_address(p);

      pg->last_assigned_bw_in = p->assigned_bw_in;
      pg->last_assigned_bw_out = p->assigned_bw_out;
      pg->feedback_bw_in_acc = 0;
      pg->feedback_bw_out_acc = 0;
      pg->last_delay_value = addr->prop_norm[GNUNET_ATS_QUALITY_NET_DELAY];
      pg->feedback_delay_acc = 0;

      pg->feedback_last_bw_update = GNUNET_TIME_absolute_get();
      pg->feedback_last_delay_update = GNUNET_TIME_absolute_get();
      pg->feedback_last = GNUNET_TIME_absolute_get();
      pg->feedback_task = GNUNET_SCHEDULER_add_delayed(feedback_frequency,
                                                       &set_feedback_task, pg);
    }

  return pg;
}



void
GNUNET_ATS_solver_generate_preferences_stop_all()
{
  struct PreferenceGenerator *cur;
  struct PreferenceGenerator *next;

  next = pref_gen_head;
  for (cur = next; NULL != cur; cur = next)
    {
      next = cur->next;
      GNUNET_ATS_solver_generate_preferences_stop(cur);
    }
}



static const char *
print_op(enum OperationType op)
{
  switch (op)
    {
    case SOLVER_OP_ADD_ADDRESS:
      return "ADD_ADDRESS";

    case SOLVER_OP_DEL_ADDRESS:
      return "DEL_ADDRESS";

    case SOLVER_OP_START_SET_PREFERENCE:
      return "START_SET_PREFERENCE";

    case SOLVER_OP_STOP_SET_PREFERENCE:
      return "STOP_STOP_PREFERENCE";

    case SOLVER_OP_START_SET_PROPERTY:
      return "START_SET_PROPERTY";

    case SOLVER_OP_STOP_SET_PROPERTY:
      return "STOP_SET_PROPERTY";

    case SOLVER_OP_START_REQUEST:
      return "START_REQUEST";

    case SOLVER_OP_STOP_REQUEST:
      return "STOP_REQUEST";

    default:
      break;
    }
  return "";
}


static struct Experiment *
create_experiment()
{
  struct Experiment *e;

  e = GNUNET_new(struct Experiment);
  e->name = NULL;
  e->start = NULL;
  e->total_duration = GNUNET_TIME_UNIT_ZERO;
  return e;
}


static void
free_experiment(struct Experiment *e)
{
  struct Episode *cur;
  struct Episode *next;
  struct GNUNET_ATS_TEST_Operation *cur_o;
  struct GNUNET_ATS_TEST_Operation *next_o;

  next = e->start;
  for (cur = next; NULL != cur; cur = next)
    {
      next = cur->next;

      next_o = cur->head;
      for (cur_o = next_o; NULL != cur_o; cur_o = next_o)
        {
          next_o = cur_o->next;
          GNUNET_free_non_null(cur_o->address);
          GNUNET_free_non_null(cur_o->plugin);
          GNUNET_free(cur_o);
        }
      GNUNET_free(cur);
    }

  GNUNET_free_non_null(e->name);
  GNUNET_free_non_null(e->log_prefix);
  GNUNET_free_non_null(e->log_output_dir);
  GNUNET_free_non_null(e->cfg_file);
  GNUNET_free(e);
}


static int
load_op_add_address(struct GNUNET_ATS_TEST_Operation *o,
                    struct Episode *e,
                    int op_counter,
                    char *sec_name,
                    const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *op_name;
  char *op_network;

  /* peer pid */
  GNUNET_asprintf(&op_name, "op-%u-peer-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->peer_id))
    {
      fprintf(stderr, "Missing peer-id in operation %u `%s' in episode `%s'\n",
              op_counter, "ADD_ADDRESS", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* address pid */
  GNUNET_asprintf(&op_name, "op-%u-address-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->address_id))
    {
      fprintf(stderr, "Missing address-id in operation %u `%s' in episode `%s'\n",
              op_counter, "ADD_ADDRESS", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* plugin */
  GNUNET_asprintf(&op_name, "op-%u-plugin", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                             sec_name, op_name, &o->plugin))
    {
      fprintf(stderr, "Missing plugin in operation %u `%s' in episode `%s'\n",
              op_counter, "ADD_ADDRESS", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* address  */
  GNUNET_asprintf(&op_name, "op-%u-address", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                             sec_name, op_name, &o->address))
    {
      fprintf(stderr, "Missing address in operation %u `%s' in episode `%s'\n",
              op_counter, "ADD_ADDRESS", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* session */
  GNUNET_asprintf(&op_name, "op-%u-address-session", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->address_session))
    {
      fprintf(stderr, "Missing address-session in operation %u `%s' in episode `%s'\n",
              op_counter, "ADD_ADDRESS", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* network */
  GNUNET_asprintf(&op_name, "op-%u-address-network", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                             sec_name, op_name, &op_network))
    {
      fprintf(stderr, "Missing address-network in operation %u `%s' in episode `%s'\n",
              op_counter, "ADD_ADDRESS", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  else
    {
      GNUNET_STRINGS_utf8_toupper(op_network, op_network);
      if (0 == strcmp(op_network, "UNSPECIFIED"))
        {
          o->address_network = GNUNET_NT_UNSPECIFIED;
        }
      else if (0 == strcmp(op_network, "LOOPBACK"))
        {
          o->address_network = GNUNET_NT_LOOPBACK;
        }
      else if (0 == strcmp(op_network, "LAN"))
        {
          o->address_network = GNUNET_NT_LAN;
        }
      else if (0 == strcmp(op_network, "WAN"))
        {
          o->address_network = GNUNET_NT_WAN;
        }
      else if (0 == strcmp(op_network, "WLAN"))
        {
          o->address_network = GNUNET_NT_WLAN;
        }
      else if (0 == strcmp(op_network, "BT"))
        {
          o->address_network = GNUNET_NT_BT;
        }
      else
        {
          fprintf(stderr, "Invalid address-network in operation %u `%s' in episode `%s': `%s'\n",
                  op_counter, "ADD_ADDRESS", op_name, op_network);
          GNUNET_free(op_network);
          GNUNET_free(op_name);
          return GNUNET_SYSERR;
        }
    }
  GNUNET_free(op_network);
  GNUNET_free(op_name);

  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Found operation %s: [%llu:%llu] address `%s' plugin `%s' \n",
             "ADD_ADDRESS", o->peer_id, o->address_id, o->address, o->plugin);

  return GNUNET_OK;
}


static int
load_op_del_address(struct GNUNET_ATS_TEST_Operation *o,
                    struct Episode *e,
                    int op_counter,
                    char *sec_name,
                    const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *op_name;

  //char *op_network;

  /* peer pid */
  GNUNET_asprintf(&op_name, "op-%u-peer-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->peer_id))
    {
      fprintf(stderr, "Missing peer-id in operation %u `%s' in episode `%s'\n",
              op_counter, "DEL_ADDRESS", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* address pid */
  GNUNET_asprintf(&op_name, "op-%u-address-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->address_id))
    {
      fprintf(stderr, "Missing address-id in operation %u `%s' in episode `%s'\n",
              op_counter, "DEL_ADDRESS", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

#if 0
  /* plugin */
  GNUNET_asprintf(&op_name, "op-%u-plugin", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                             sec_name, op_name, &o->plugin))
    {
      fprintf(stderr, "Missing plugin in operation %u `%s' in episode `%s'\n",
              op_counter, "DEL_ADDRESS", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* address  */
  GNUNET_asprintf(&op_name, "op-%u-address", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                             sec_name, op_name, &o->address))
    {
      fprintf(stderr, "Missing address in operation %u `%s' in episode `%s'\n",
              op_counter, "DEL_ADDRESS", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* session */
  GNUNET_asprintf(&op_name, "op-%u-address-session", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->address_session))
    {
      fprintf(stderr, "Missing address-session in operation %u `%s' in episode `%s'\n",
              op_counter, "DEL_ADDRESS", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);
#endif

  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Found operation %s: [%llu:%llu] address `%s' plugin `%s' \n",
             "DEL_ADDRESS", o->peer_id, o->address_id, o->address, o->plugin);

  return GNUNET_OK;
}


static enum GNUNET_ATS_Property
parse_preference_string(const char * str)
{
  int c = 0;
  char *props[GNUNET_ATS_PreferenceCount] = GNUNET_ATS_PreferenceTypeString;

  for (c = 0; c < GNUNET_ATS_PreferenceCount; c++)
    if (0 == strcmp(str, props[c]))
      return c;
  return 0;
}


static int
load_op_start_set_preference(struct GNUNET_ATS_TEST_Operation *o,
                             struct Episode *e,
                             int op_counter,
                             char *sec_name,
                             const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *op_name;
  char *type;
  char *pref;

  /* peer pid */
  GNUNET_asprintf(&op_name, "op-%u-peer-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->peer_id))
    {
      fprintf(stderr, "Missing peer-id in operation %u  `%s' in episode `%s'\n",
              op_counter, "START_SET_PREFERENCE", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* address pid */
  GNUNET_asprintf(&op_name, "op-%u-client-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->client_id))
    {
      fprintf(stderr, "Missing client-id in operation %u `%s' in episode `%s'\n",
              op_counter, "START_SET_PREFERENCE", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* generator */
  GNUNET_asprintf(&op_name, "op-%u-gen-type", op_counter);
  if ((GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                              sec_name, op_name, &type)))
    {
      fprintf(stderr, "Missing type in operation %u `%s' in episode `%s'\n",
              op_counter, "START_SET_PREFERENCE", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }

  /* Load arguments for set_rate, start_send, set_preference */
  if (0 == strcmp(type, "constant"))
    {
      o->gen_type = GNUNET_ATS_TEST_TG_CONSTANT;
    }
  else if (0 == strcmp(type, "linear"))
    {
      o->gen_type = GNUNET_ATS_TEST_TG_LINEAR;
    }
  else if (0 == strcmp(type, "sinus"))
    {
      o->gen_type = GNUNET_ATS_TEST_TG_SINUS;
    }
  else if (0 == strcmp(type, "random"))
    {
      o->gen_type = GNUNET_ATS_TEST_TG_RANDOM;
    }
  else
    {
      fprintf(stderr, "Invalid generator type %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(type);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(type);
  GNUNET_free(op_name);


  /* Get base rate */
  GNUNET_asprintf(&op_name, "op-%u-base-rate", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->base_rate))
    {
      fprintf(stderr, "Missing base rate in operation %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);


  /* Get max rate */
  GNUNET_asprintf(&op_name, "op-%u-max-rate", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->max_rate))
    {
      if ((GNUNET_ATS_TEST_TG_LINEAR == o->gen_type) ||
          (GNUNET_ATS_TEST_TG_RANDOM == o->gen_type) ||
          (GNUNET_ATS_TEST_TG_SINUS == o->gen_type))
        {
          fprintf(stderr, "Missing max rate in operation %u `%s' in episode %u\n",
                  op_counter, op_name, e->id);
          GNUNET_free(op_name);
          return GNUNET_SYSERR;
        }
    }
  GNUNET_free(op_name);

  /* Get period */
  GNUNET_asprintf(&op_name, "op-%u-period", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_time(cfg,
                                                           sec_name, op_name, &o->period))
    {
      o->period = e->duration;
    }
  GNUNET_free(op_name);

  /* Get frequency */
  GNUNET_asprintf(&op_name, "op-%u-frequency", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_time(cfg,
                                                           sec_name, op_name, &o->frequency))
    {
      fprintf(stderr, "Missing frequency in operation %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* Get preference */
  GNUNET_asprintf(&op_name, "op-%u-pref", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                             sec_name, op_name, &pref))
    {
      fprintf(stderr, "Missing preference in operation %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }

  if (0 == (o->pref_type = parse_preference_string(pref)))
    {
      fprintf(stderr, "Invalid preference in operation %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(op_name);
      GNUNET_free(pref);
      return GNUNET_SYSERR;
    }
  GNUNET_free(pref);
  GNUNET_free(op_name);

  /* Get feedback delay */
  GNUNET_asprintf(&op_name, "op-%u-feedback_delay", op_counter);
  if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_time(cfg,
                                                       sec_name, op_name, &o->feedback_delay))
    {
      fprintf(stderr, "Using feedback delay %llu in operation %u `%s' in episode %u\n",
              (long long unsigned int)o->feedback_delay.rel_value_us,
              op_counter, op_name, e->id);
    }
  else
    o->feedback_delay = GNUNET_TIME_UNIT_FOREVER_REL;
  GNUNET_free(op_name);

  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Found operation %s: [%llu:%llu]: %s = %llu\n",
             "START_SET_PREFERENCE", o->peer_id, o->address_id,
             GNUNET_ATS_print_preference_type(o->pref_type), o->base_rate);

  return GNUNET_OK;
}


static int
load_op_stop_set_preference(struct GNUNET_ATS_TEST_Operation *o,
                            struct Episode *e,
                            int op_counter,
                            char *sec_name,
                            const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *op_name;
  char *pref;

  /* peer pid */
  GNUNET_asprintf(&op_name, "op-%u-peer-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->peer_id))
    {
      fprintf(stderr, "Missing peer-id in operation %u  `%s' in episode `%s'\n",
              op_counter, "STOP_SET_PREFERENCE", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* address pid */
  GNUNET_asprintf(&op_name, "op-%u-address-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->address_id))
    {
      fprintf(stderr, "Missing address-id in operation %u `%s' in episode `%s'\n",
              op_counter, "STOP_SET_PREFERENCE", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* Get preference */
  GNUNET_asprintf(&op_name, "op-%u-pref", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                             sec_name, op_name, &pref))
    {
      fprintf(stderr, "Missing preference in operation %u `%s' in episode `%s'\n",
              op_counter, "STOP_SET_PREFERENCE", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }

  if (0 == (o->pref_type = parse_preference_string(pref)))
    {
      fprintf(stderr, "Invalid preference in operation %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(op_name);
      GNUNET_free(pref);
      return GNUNET_SYSERR;
    }
  GNUNET_free(pref);
  GNUNET_free(op_name);

  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Found operation %s: [%llu:%llu]: %s\n",
             "STOP_SET_PREFERENCE", o->peer_id, o->address_id,
             GNUNET_ATS_print_preference_type(o->pref_type));
  return GNUNET_OK;
}


static enum GNUNET_ATS_Property
parse_property_string(const char *str)
{
  enum GNUNET_ATS_Property c;

  for (c = 0; c < GNUNET_ATS_PropertyCount; c++)
    if (0 == strcmp(str,
                    GNUNET_ATS_print_property_type(c)))
      return c;
  return 0;
}


static int
load_op_start_set_property(struct GNUNET_ATS_TEST_Operation *o,
                           struct Episode *e,
                           int op_counter,
                           char *sec_name,
                           const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *op_name;
  char *type;
  char *prop;

  /* peer pid */
  GNUNET_asprintf(&op_name, "op-%u-peer-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->peer_id))
    {
      fprintf(stderr, "Missing peer-id in operation %u  `%s' in episode `%s'\n",
              op_counter, "START_SET_PROPERTY", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* address pid */
  GNUNET_asprintf(&op_name, "op-%u-address-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->address_id))
    {
      fprintf(stderr, "Missing address-id in operation %u `%s' in episode `%s'\n",
              op_counter, "START_SET_PROPERTY", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* generator */
  GNUNET_asprintf(&op_name, "op-%u-gen-type", op_counter);
  if ((GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                              sec_name, op_name, &type)))
    {
      fprintf(stderr, "Missing type in operation %u `%s' in episode `%s'\n",
              op_counter, "START_SET_PROPERTY", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }

  /* Load arguments for set_rate, start_send, set_preference */
  if (0 == strcmp(type, "constant"))
    {
      o->gen_type = GNUNET_ATS_TEST_TG_CONSTANT;
    }
  else if (0 == strcmp(type, "linear"))
    {
      o->gen_type = GNUNET_ATS_TEST_TG_LINEAR;
    }
  else if (0 == strcmp(type, "sinus"))
    {
      o->gen_type = GNUNET_ATS_TEST_TG_SINUS;
    }
  else if (0 == strcmp(type, "random"))
    {
      o->gen_type = GNUNET_ATS_TEST_TG_RANDOM;
    }
  else
    {
      fprintf(stderr, "Invalid generator type %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(type);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(type);
  GNUNET_free(op_name);


  /* Get base rate */
  GNUNET_asprintf(&op_name, "op-%u-base-rate", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->base_rate))
    {
      fprintf(stderr, "Missing base rate in operation %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);


  /* Get max rate */
  GNUNET_asprintf(&op_name, "op-%u-max-rate", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->max_rate))
    {
      if ((GNUNET_ATS_TEST_TG_LINEAR == o->gen_type) ||
          (GNUNET_ATS_TEST_TG_RANDOM == o->gen_type) ||
          (GNUNET_ATS_TEST_TG_SINUS == o->gen_type))
        {
          fprintf(stderr, "Missing max rate in operation %u `%s' in episode %u\n",
                  op_counter, op_name, e->id);
          GNUNET_free(op_name);
          return GNUNET_SYSERR;
        }
    }
  GNUNET_free(op_name);

  /* Get period */
  GNUNET_asprintf(&op_name, "op-%u-period", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_time(cfg,
                                                           sec_name, op_name, &o->period))
    {
      o->period = e->duration;
    }
  GNUNET_free(op_name);

  /* Get frequency */
  GNUNET_asprintf(&op_name, "op-%u-frequency", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_time(cfg,
                                                           sec_name, op_name, &o->frequency))
    {
      fprintf(stderr, "Missing frequency in operation %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* Get preference */
  GNUNET_asprintf(&op_name, "op-%u-property", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                             sec_name, op_name, &prop))
    {
      fprintf(stderr, "Missing property in operation %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(op_name);
      GNUNET_free_non_null(prop);
      return GNUNET_SYSERR;
    }

  if (0 == (o->prop_type = parse_property_string(prop)))
    {
      fprintf(stderr, "Invalid property in operation %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(op_name);
      GNUNET_free(prop);
      return GNUNET_SYSERR;
    }

  GNUNET_free(prop);
  GNUNET_free(op_name);

  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Found operation %s: [%llu:%llu] %s = %llu\n",
             "START_SET_PROPERTY", o->peer_id, o->address_id,
             GNUNET_ATS_print_property_type(o->prop_type), o->base_rate);

  return GNUNET_OK;
}

static int
load_op_stop_set_property(struct GNUNET_ATS_TEST_Operation *o,
                          struct Episode *e,
                          int op_counter,
                          char *sec_name,
                          const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *op_name;
  char *pref;

  /* peer pid */
  GNUNET_asprintf(&op_name, "op-%u-peer-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->peer_id))
    {
      fprintf(stderr, "Missing peer-id in operation %u  `%s' in episode `%s'\n",
              op_counter, "STOP_SET_PROPERTY", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* address pid */
  GNUNET_asprintf(&op_name, "op-%u-address-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->address_id))
    {
      fprintf(stderr, "Missing address-id in operation %u `%s' in episode `%s'\n",
              op_counter, "STOP_SET_PROPERTY", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);

  /* Get property */
  GNUNET_asprintf(&op_name, "op-%u-property", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                             sec_name, op_name, &pref))
    {
      fprintf(stderr, "Missing property in operation %u `%s' in episode `%s'\n",
              op_counter, "STOP_SET_PROPERTY", op_name);
      GNUNET_free(op_name);
      GNUNET_free_non_null(pref);
      return GNUNET_SYSERR;
    }

  if (0 == (o->prop_type = parse_property_string(pref)))
    {
      fprintf(stderr, "Invalid property in operation %u `%s' in episode %u\n",
              op_counter, op_name, e->id);
      GNUNET_free(op_name);
      GNUNET_free_non_null(pref);
      return GNUNET_SYSERR;
    }

  GNUNET_free(pref);
  GNUNET_free(op_name);

  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Found operation %s: [%llu:%llu] %s\n",
             "STOP_SET_PROPERTY", o->peer_id, o->address_id,
             GNUNET_ATS_print_property_type(o->prop_type));

  return GNUNET_OK;
}


static int
load_op_start_request(struct GNUNET_ATS_TEST_Operation *o,
                      struct Episode *e,
                      int op_counter,
                      char *sec_name,
                      const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *op_name;

  /* peer pid */
  GNUNET_asprintf(&op_name, "op-%u-peer-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->peer_id))
    {
      fprintf(stderr, "Missing peer-id in operation %u  `%s' in episode `%s'\n",
              op_counter, "START_REQUEST", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);
  return GNUNET_OK;
}

static int
load_op_stop_request(struct GNUNET_ATS_TEST_Operation *o,
                     struct Episode *e,
                     int op_counter,
                     char *sec_name,
                     const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *op_name;

  /* peer pid */
  GNUNET_asprintf(&op_name, "op-%u-peer-id", op_counter);
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_number(cfg,
                                                             sec_name, op_name, &o->peer_id))
    {
      fprintf(stderr, "Missing peer-id in operation %u  `%s' in episode `%s'\n",
              op_counter, "STOP_REQUEST", op_name);
      GNUNET_free(op_name);
      return GNUNET_SYSERR;
    }
  GNUNET_free(op_name);
  return GNUNET_OK;
}


static int
load_episode(struct Experiment *e, struct Episode *cur,
             struct GNUNET_CONFIGURATION_Handle *cfg)
{
  struct GNUNET_ATS_TEST_Operation *o;
  char *sec_name;
  char *op_name;
  char *op;
  int op_counter = 0;
  int res;

  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "=== Parsing episode %u\n", cur->id);
  GNUNET_asprintf(&sec_name, "episode-%u", cur->id);

  while (1)
    {
      /* Load operation */
      GNUNET_asprintf(&op_name, "op-%u-operation", op_counter);
      if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg,
                                                                 sec_name, op_name, &op))
        {
          GNUNET_free(op_name);
          break;
        }
      o = GNUNET_new(struct GNUNET_ATS_TEST_Operation);
      GNUNET_log(GNUNET_ERROR_TYPE_INFO, "==== Parsing operation %u: `%s'\n",
                 cur->id, op_name);

      /* operations = set_rate, start_send, stop_send, set_preference */
      if (0 == strcmp(op, "address_add"))
        {
          o->type = SOLVER_OP_ADD_ADDRESS;
          res = load_op_add_address(o, cur,
                                    op_counter, sec_name, cfg);
        }
      else if (0 == strcmp(op, "address_del"))
        {
          o->type = SOLVER_OP_DEL_ADDRESS;
          res = load_op_del_address(o, cur,
                                    op_counter, sec_name, cfg);
        }
      else if (0 == strcmp(op, "start_set_property"))
        {
          o->type = SOLVER_OP_START_SET_PROPERTY;
          res = load_op_start_set_property(o, cur,
                                           op_counter, sec_name, cfg);
        }
      else if (0 == strcmp(op, "stop_set_property"))
        {
          o->type = SOLVER_OP_STOP_SET_PROPERTY;
          res = load_op_stop_set_property(o, cur,
                                          op_counter, sec_name, cfg);
        }
      else if (0 == strcmp(op, "start_set_preference"))
        {
          o->type = SOLVER_OP_START_SET_PREFERENCE;
          res = load_op_start_set_preference(o, cur,
                                             op_counter, sec_name, cfg);
        }
      else if (0 == strcmp(op, "stop_set_preference"))
        {
          o->type = SOLVER_OP_STOP_SET_PREFERENCE;
          res = load_op_stop_set_preference(o, cur,
                                            op_counter, sec_name, cfg);
        }
      else if (0 == strcmp(op, "start_request"))
        {
          o->type = SOLVER_OP_START_REQUEST;
          res = load_op_start_request(o, cur,
                                      op_counter, sec_name, cfg);
        }
      else if (0 == strcmp(op, "stop_request"))
        {
          o->type = SOLVER_OP_STOP_REQUEST;
          res = load_op_stop_request(o, cur,
                                     op_counter, sec_name, cfg);
        }
      else
        {
          fprintf(stderr, "Invalid operation %u `%s' in episode %u\n",
                  op_counter, op, cur->id);
          res = GNUNET_SYSERR;
        }

      GNUNET_free(op);
      GNUNET_free(op_name);

      if (GNUNET_SYSERR == res)
        {
          GNUNET_free(o);
          GNUNET_free(sec_name);
          return GNUNET_SYSERR;
        }

      GNUNET_CONTAINER_DLL_insert_tail(cur->head, cur->tail, o);
      op_counter++;
    }
  GNUNET_free(sec_name);
  return GNUNET_OK;
}

static int
load_episodes(struct Experiment *e, struct GNUNET_CONFIGURATION_Handle *cfg)
{
  int e_counter = 0;
  char *sec_name;
  struct GNUNET_TIME_Relative e_duration;
  struct Episode *cur;
  struct Episode *last;

  e_counter = 0;
  last = NULL;
  while (1)
    {
      GNUNET_asprintf(&sec_name, "episode-%u", e_counter);
      if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_time(cfg,
                                                               sec_name, "duration", &e_duration))
        {
          GNUNET_free(sec_name);
          break;
        }

      cur = GNUNET_new(struct Episode);
      cur->duration = e_duration;
      cur->id = e_counter;

      if (GNUNET_OK != load_episode(e, cur, cfg))
        {
          GNUNET_free(sec_name);
          GNUNET_free(cur);
          return GNUNET_SYSERR;
        }

      GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Found episode %u with duration %s \n",
                 e_counter,
                 GNUNET_STRINGS_relative_time_to_string(cur->duration, GNUNET_YES));

      /* Update experiment */
      e->num_episodes++;
      e->total_duration = GNUNET_TIME_relative_add(e->total_duration, cur->duration);
      /* Put in linked list */
      if (NULL == last)
        e->start = cur;
      else
        last->next = cur;

      GNUNET_free(sec_name);
      e_counter++;
      last = cur;
    }
  return e_counter;
}


static void
timeout_experiment(void *cls)
{
  struct Experiment *e = cls;

  e->experiment_timeout_task = NULL;
  fprintf(stderr, "Experiment timeout!\n");

  if (NULL != e->episode_timeout_task)
    {
      GNUNET_SCHEDULER_cancel(e->episode_timeout_task);
      e->episode_timeout_task = NULL;
    }

  e->e_done_cb(e, GNUNET_TIME_absolute_get_duration(e->start_time),
               GNUNET_SYSERR);
}

struct ATS_Address *
create_ats_address(const struct GNUNET_PeerIdentity *peer,
                   const char *plugin_name,
                   const void *plugin_addr,
                   size_t plugin_addr_len,
                   uint32_t session_id,
                   uint32_t network)
{
  struct ATS_Address *aa = NULL;

  aa = GNUNET_malloc(sizeof(struct ATS_Address) + plugin_addr_len + strlen(plugin_name) + 1);
  aa->atsi = GNUNET_new(struct GNUNET_ATS_Information);
  aa->atsi[0].type = htonl(GNUNET_ATS_NETWORK_TYPE);
  aa->atsi[0].value = htonl(network);
  aa->atsi_count = 1;

  aa->peer = *peer;
  aa->addr_len = plugin_addr_len;
  aa->addr = &aa[1];
  aa->plugin = (char *)&aa[1] + plugin_addr_len;
  GNUNET_memcpy(&aa[1], plugin_addr, plugin_addr_len);
  GNUNET_memcpy(aa->plugin, plugin_name, strlen(plugin_name) + 1);
  aa->session_id = session_id;

  return aa;
}



static void
enforce_add_address(struct GNUNET_ATS_TEST_Operation *op)
{
  struct TestPeer *p;
  struct TestAddress *a;
  int c;

  if (NULL == (p = find_peer_by_id(op->peer_id)))
    {
      p = GNUNET_new(struct TestPeer);
      p->id = op->peer_id;
      p->assigned_bw_in = 0;
      p->assigned_bw_out = 0;
      memset(&p->peer_id, op->peer_id, sizeof(p->peer_id));
      for (c = 0; c < GNUNET_ATS_PreferenceCount; c++)
        {
          p->pref_abs[c] = DEFAULT_ABS_PREFERENCE;
          p->pref_norm[c] = DEFAULT_REL_PREFERENCE;
        }

      GNUNET_CONTAINER_DLL_insert(peer_head, peer_tail, p);
    }

  if (NULL != (find_address_by_id(p, op->address_id)))
    {
      GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Duplicate address %u for peer %u\n",
                 op->address_id, op->peer_id);
      return;
    }

  a = GNUNET_new(struct TestAddress);
  a->aid = op->address_id;
  a->network = op->address_network;
  a->ats_addr = create_ats_address(&p->peer_id, op->plugin, op->address,
                                   strlen(op->address) + 1, op->address_session, op->address_network);
  memset(&p->peer_id, op->peer_id, sizeof(p->peer_id));
  GNUNET_CONTAINER_DLL_insert_tail(p->addr_head, p->addr_tail, a);

  for (c = 0; c < GNUNET_ATS_PropertyCount; c++)
    a->prop_norm[c] = DEFAULT_REL_QUALITY;

  GNUNET_CONTAINER_multipeermap_put(sh->addresses, &p->peer_id, a->ats_addr,
                                    GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);

  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Adding address %u for peer %u in network `%s'\n",
             op->address_id, op->peer_id, GNUNET_NT_to_string(a->network));

  sh->sf->s_add(sh->sf->cls, a->ats_addr, op->address_network);
}


static void
enforce_del_address(struct GNUNET_ATS_TEST_Operation *op)
{
  struct TestPeer *p;
  struct TestAddress *a;
  struct PropertyGenerator *pg;

  if (NULL == (p = find_peer_by_id(op->peer_id)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Deleting address for unknown peer %u\n", op->peer_id);
      return;
    }

  if (NULL == (a = find_address_by_id(p, op->address_id)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Deleting address for unknown peer %u\n", op->peer_id);
      return;
    }

  while (NULL != (pg = find_prop_gen(p->id, a->aid, 0)))
    {
      GNUNET_ATS_solver_generate_property_stop(pg);
    }

  GNUNET_assert(GNUNET_YES ==
                GNUNET_CONTAINER_multipeermap_remove(sh->addresses,
                                                     &p->peer_id,
                                                     a->ats_addr));
  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Removing address %u for peer %u\n",
             op->address_id,
             op->peer_id);

  sh->sf->s_del(sh->sf->cls, a->ats_addr);

  if (NULL != l)
    {
      GNUNET_ATS_solver_logging_now(l);
    }
  GNUNET_CONTAINER_DLL_remove(p->addr_head, p->addr_tail, a);

  GNUNET_free_non_null(a->ats_addr->atsi);
  GNUNET_free(a->ats_addr);
  GNUNET_free(a);
}

static void
enforce_start_property(struct GNUNET_ATS_TEST_Operation *op)
{
  struct PropertyGenerator *pg;
  struct TestPeer *p;
  struct TestAddress *a;

  if (NULL != (pg = find_prop_gen(op->peer_id, op->address_id, op->prop_type)))
    {
      GNUNET_ATS_solver_generate_property_stop(pg);
      GNUNET_free(pg);
    }

  if (NULL == (p = find_peer_by_id(op->peer_id)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Starting property generation for unknown peer %u\n", op->peer_id);
      return;
    }

  if (NULL == (a = find_address_by_id(p, op->address_id)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Setting property for unknown address %u\n", op->peer_id);
      return;
    }

  GNUNET_ATS_solver_generate_property_start(op->peer_id,
                                            op->address_id,
                                            p, a,
                                            op->gen_type,
                                            op->base_rate,
                                            op->max_rate,
                                            op->period,
                                            op->frequency,
                                            op->prop_type);
}

static void
enforce_stop_property(struct GNUNET_ATS_TEST_Operation *op)
{
  struct PropertyGenerator *pg = find_prop_gen(op->peer_id, op->address_id,
                                               op->prop_type);

  if (NULL != pg)
    {
      GNUNET_log(GNUNET_ERROR_TYPE_INFO,
                 "Stopping preference generation for peer %u address %u\n", op->peer_id,
                 op->address_id);
      GNUNET_ATS_solver_generate_property_stop(pg);
    }
  else
    {
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Cannot find preference generator for peer %u address %u\n",
                 op->peer_id, op->address_id);
      GNUNET_break(0);
    }
}

static void
enforce_start_preference(struct GNUNET_ATS_TEST_Operation *op)
{
  struct PreferenceGenerator *pg;

  if (NULL != (pg = find_pref_gen(op->peer_id, op->pref_type)))
    {
      GNUNET_ATS_solver_generate_preferences_stop(pg);
      GNUNET_free(pg);
    }

  if (NULL == (find_peer_by_id(op->peer_id)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Starting preference generation for unknown peer %u\n", op->peer_id);
      return;
    }

  GNUNET_ATS_solver_generate_preferences_start(op->peer_id,
                                               op->address_id,
                                               op->client_id,
                                               op->gen_type,
                                               op->base_rate,
                                               op->max_rate,
                                               op->period,
                                               op->frequency,
                                               op->pref_type,
                                               op->frequency);
}

static void
enforce_stop_preference(struct GNUNET_ATS_TEST_Operation *op)
{
  struct PreferenceGenerator *pg = find_pref_gen(op->peer_id,
                                                 op->pref_type);

  if (NULL != pg)
    {
      GNUNET_log(GNUNET_ERROR_TYPE_INFO,
                 "Stopping property generation for peer %u address %u\n", op->peer_id,
                 op->address_id);
      GNUNET_ATS_solver_generate_preferences_stop(pg);
    }
  else
    {
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Cannot find preference generator for peer %u address %u\n",
                 op->peer_id, op->address_id);
      GNUNET_break(0);
    }
}


static void
enforce_start_request(struct GNUNET_ATS_TEST_Operation *op)
{
  struct TestPeer *p;

  if (NULL == (p = find_peer_by_id(op->peer_id)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Requesting address for unknown peer %u\n", op->peer_id);
      return;
    }

  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Requesting address for peer %u\n",
             op->peer_id);
  p->is_requested = GNUNET_YES;

  sh->sf->s_get(sh->sf->cls, &p->peer_id);
}


static void
enforce_stop_request(struct GNUNET_ATS_TEST_Operation *op)
{
  struct TestPeer *p;

  if (NULL == (p = find_peer_by_id(op->peer_id)))
    {
      GNUNET_break(0);
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "Requesting address for unknown peer %u\n", op->peer_id);
      return;
    }

  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Stop requesting address for peer %u\n",
             op->peer_id);
  p->is_requested = GNUNET_NO;
  p->assigned_bw_in = 0;
  p->assigned_bw_out = 0;
  sh->sf->s_get_stop(sh->sf->cls, &p->peer_id);

  if (NULL != l)
    {
      GNUNET_ATS_solver_logging_now(l);
    }
}

static void enforce_episode(struct Episode *ep)
{
  struct GNUNET_ATS_TEST_Operation *cur;

  for (cur = ep->head; NULL != cur; cur = cur->next)
    {
      switch (cur->type)
        {
        case SOLVER_OP_ADD_ADDRESS:
          fprintf(stderr, "Enforcing operation: %s [%llu:%llu]\n",
                  print_op(cur->type), cur->peer_id, cur->address_id);
          enforce_add_address(cur);
          break;

        case SOLVER_OP_DEL_ADDRESS:
          fprintf(stderr, "Enforcing operation: %s [%llu:%llu]\n",
                  print_op(cur->type), cur->peer_id, cur->address_id);
          enforce_del_address(cur);
          break;

        case SOLVER_OP_START_SET_PROPERTY:
          fprintf(stderr, "Enforcing operation: %s [%llu:%llu] == %llu\n",
                  print_op(cur->type), cur->peer_id, cur->address_id, cur->base_rate);
          enforce_start_property(cur);
          break;

        case SOLVER_OP_STOP_SET_PROPERTY:
          fprintf(stderr, "Enforcing operation: %s [%llu:%llu] == %llu\n",
                  print_op(cur->type), cur->peer_id, cur->address_id, cur->base_rate);
          enforce_stop_property(cur);
          break;

        case SOLVER_OP_START_SET_PREFERENCE:
          fprintf(stderr, "Enforcing operation: %s [%llu:%llu] == %llu\n",
                  print_op(cur->type), cur->peer_id, cur->address_id, cur->base_rate);
          enforce_start_preference(cur);
          break;

        case SOLVER_OP_STOP_SET_PREFERENCE:
          fprintf(stderr, "Enforcing operation: %s [%llu:%llu] == %llu\n",
                  print_op(cur->type), cur->peer_id, cur->address_id, cur->base_rate);
          enforce_stop_preference(cur);
          break;

        case SOLVER_OP_START_REQUEST:
          fprintf(stderr, "Enforcing operation: %s [%llu]\n",
                  print_op(cur->type), cur->peer_id);
          enforce_start_request(cur);
          break;

        case SOLVER_OP_STOP_REQUEST:
          fprintf(stderr, "Enforcing operation: %s [%llu]\n",
                  print_op(cur->type), cur->peer_id);
          enforce_stop_request(cur);
          break;

        default:
          break;
        }
    }
}


static void
timeout_episode(void *cls)
{
  struct Experiment *e = cls;

  e->episode_timeout_task = NULL;
  if (NULL != e->ep_done_cb)
    e->ep_done_cb(e->cur);

  /* Scheduling next */
  e->cur = e->cur->next;
  if (NULL == e->cur)
    {
      /* done */
      fprintf(stderr, "Last episode done!\n");
      if (NULL != e->experiment_timeout_task)
        {
          GNUNET_SCHEDULER_cancel(e->experiment_timeout_task);
          e->experiment_timeout_task = NULL;
        }
      e->e_done_cb(e, GNUNET_TIME_absolute_get_duration(e->start_time), GNUNET_OK);
      return;
    }

  fprintf(stderr, "Running episode %u with timeout %s\n",
          e->cur->id,
          GNUNET_STRINGS_relative_time_to_string(e->cur->duration, GNUNET_YES));
  e->episode_timeout_task = GNUNET_SCHEDULER_add_delayed(e->cur->duration,
                                                         &timeout_episode, e);
  enforce_episode(e->cur);
}


void
GNUNET_ATS_solvers_experimentation_run(struct Experiment *e,
                                       GNUNET_ATS_TESTING_EpisodeDoneCallback ep_done_cb,
                                       GNUNET_ATS_TESTING_ExperimentDoneCallback e_done_cb)
{
  fprintf(stderr, "Running experiment `%s'  with timeout %s\n", e->name,
          GNUNET_STRINGS_relative_time_to_string(e->max_duration, GNUNET_YES));
  e->e_done_cb = e_done_cb;
  e->ep_done_cb = ep_done_cb;
  e->start_time = GNUNET_TIME_absolute_get();

  /* Start total time out */
  e->experiment_timeout_task = GNUNET_SCHEDULER_add_delayed(e->max_duration,
                                                            &timeout_experiment, e);

  /* Start */
  if (NULL == e->start)
    {
      GNUNET_break(0);
      return;
    }

  e->cur = e->start;
  fprintf(stderr, "Running episode %u with timeout %s\n",
          e->cur->id,
          GNUNET_STRINGS_relative_time_to_string(e->cur->duration, GNUNET_YES));
  e->episode_timeout_task = GNUNET_SCHEDULER_add_delayed(e->cur->duration,
                                                         &timeout_episode, e);
  enforce_episode(e->cur);
}

void
GNUNET_ATS_solvers_experimentation_stop(struct Experiment *e)
{
  if (NULL != e->experiment_timeout_task)
    {
      GNUNET_SCHEDULER_cancel(e->experiment_timeout_task);
      e->experiment_timeout_task = NULL;
    }
  if (NULL != e->episode_timeout_task)
    {
      GNUNET_SCHEDULER_cancel(e->episode_timeout_task);
      e->episode_timeout_task = NULL;
    }
  if (NULL != e->cfg)
    {
      GNUNET_CONFIGURATION_destroy(e->cfg);
      e->cfg = NULL;
    }
  free_experiment(e);
}


struct Experiment *
GNUNET_ATS_solvers_experimentation_load(char *filename)
{
  struct Experiment *e;
  struct GNUNET_CONFIGURATION_Handle *cfg;

  e = NULL;

  cfg = GNUNET_CONFIGURATION_create();
  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_load(cfg, filename))
    {
      fprintf(stderr, "Failed to load `%s'\n", filename);
      GNUNET_CONFIGURATION_destroy(cfg);
      return NULL;
    }

  e = create_experiment();

  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg, "experiment",
                                                             "name", &e->name))
    {
      fprintf(stderr, "Invalid %s \n", "name");
      free_experiment(e);
      return NULL;
    }
  else
    GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Experiment name: `%s'\n", e->name);

  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_string(cfg, "experiment",
                                                             "log_prefix", &e->log_prefix))
    {
      fprintf(stderr, "Invalid %s \n", "log_prefix");
      free_experiment(e);
      return NULL;
    }
  else
    GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Experiment logging prefix: `%s'\n",
               e->log_prefix);

  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_filename(cfg, "experiment",
                                                               "log_output_dir", &e->log_output_dir))
    {
      e->log_output_dir = NULL;
    }
  else
    GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Experiment logging output directory: `%s'\n",
               e->log_output_dir);


  if (GNUNET_SYSERR == (e->log_append_time_stamp = GNUNET_CONFIGURATION_get_value_yesno(cfg,
                                                                                        "experiment", "log_append_time_stamp")))
    e->log_append_time_stamp = GNUNET_YES;
  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Experiment logging append timestamp: `%s'\n",
             (GNUNET_YES == e->log_append_time_stamp) ? "yes" : "no");


  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_filename(cfg, "experiment",
                                                               "cfg_file", &e->cfg_file))
    {
      fprintf(stderr, "Invalid %s \n", "cfg_file");
      free_experiment(e);
      return NULL;
    }
  else
    {
      GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Experiment configuration: `%s'\n", e->cfg_file);
      e->cfg = GNUNET_CONFIGURATION_create();
      if (GNUNET_SYSERR == GNUNET_CONFIGURATION_load(e->cfg, e->cfg_file))
        {
          fprintf(stderr, "Invalid configuration %s \n", "cfg_file");
          free_experiment(e);
          return NULL;
        }
    }

  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_time(cfg, "experiment",
                                                           "log_freq", &e->log_freq))
    {
      fprintf(stderr, "Invalid %s \n", "log_freq");
      free_experiment(e);
      return NULL;
    }
  else
    GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Experiment logging frequency: `%s'\n",
               GNUNET_STRINGS_relative_time_to_string(e->log_freq, GNUNET_YES));

  if (GNUNET_SYSERR == GNUNET_CONFIGURATION_get_value_time(cfg, "experiment",
                                                           "max_duration", &e->max_duration))
    {
      fprintf(stderr, "Invalid %s", "max_duration");
      free_experiment(e);
      return NULL;
    }
  else
    GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Experiment duration: `%s'\n",
               GNUNET_STRINGS_relative_time_to_string(e->max_duration, GNUNET_YES));

  if (GNUNET_SYSERR == load_episodes(e, cfg))
    {
      GNUNET_ATS_solvers_experimentation_stop(e);
      GNUNET_CONFIGURATION_destroy(cfg);
      e = NULL;
      fprintf(stderr, "Failed to load experiment\n");
      return NULL;
    }
  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Loaded %u episodes with total duration %s\n",
             e->num_episodes,
             GNUNET_STRINGS_relative_time_to_string(e->total_duration, GNUNET_YES));

  GNUNET_CONFIGURATION_destroy(cfg);
  return e;
}



static int
free_all_it(void *cls,
            const struct GNUNET_PeerIdentity *key,
            void *value)
{
  struct ATS_Address *address = value;

  GNUNET_break(GNUNET_OK == GNUNET_CONTAINER_multipeermap_remove(sh->env.addresses,
                                                                 key, value));
  GNUNET_free(address);

  return GNUNET_OK;
}

void
GNUNET_ATS_solvers_solver_stop(struct SolverHandle *sh)
{
  GNUNET_STATISTICS_destroy((struct GNUNET_STATISTICS_Handle *)sh->env.stats,
                            GNUNET_NO);
  GNUNET_PLUGIN_unload(sh->plugin, sh->sf);
  sh->sf = NULL;
  GAS_normalization_stop();

  GNUNET_CONTAINER_multipeermap_iterate(sh->addresses,
                                        &free_all_it,
                                        NULL);
  GNUNET_CONTAINER_multipeermap_destroy(sh->addresses);
  GNUNET_free(sh->plugin);
  GNUNET_free(sh);
}


unsigned int
GNUNET_ATS_solvers_load_quotas(const struct GNUNET_CONFIGURATION_Handle *cfg,
                               unsigned long long *out_dest,
                               unsigned long long *in_dest,
                               int dest_length)
{
  char * entry_in = NULL;
  char * entry_out = NULL;
  char * quota_out_str;
  char * quota_in_str;
  int c;
  int res;

  for (c = 0; (c < GNUNET_NT_COUNT) && (c < dest_length); c++)
    {
      in_dest[c] = 0;
      out_dest[c] = 0;
      GNUNET_asprintf(&entry_out,
                      "%s_QUOTA_OUT",
                      GNUNET_NT_to_string(c));
      GNUNET_asprintf(&entry_in,
                      "%s_QUOTA_IN",
                      GNUNET_NT_to_string(c));

      /* quota out */
      if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string(cfg, "ats", entry_out, &quota_out_str))
        {
          res = GNUNET_NO;
          if (0 == strcmp(quota_out_str, BIG_M_STRING))
            {
              out_dest[c] = GNUNET_ATS_MaxBandwidth;
              res = GNUNET_YES;
            }
          if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_STRINGS_fancy_size_to_bytes(quota_out_str, &out_dest[c])))
            res = GNUNET_YES;
          if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "ats", entry_out, &out_dest[c])))
            res = GNUNET_YES;

          if (GNUNET_NO == res)
            {
              GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                         _("Could not load quota for network `%s':  `%s', assigning default bandwidth %llu\n"),
                         GNUNET_NT_to_string(c),
                         quota_out_str,
                         GNUNET_ATS_DefaultBandwidth);
              out_dest[c] = GNUNET_ATS_DefaultBandwidth;
            }
          else
            {
              GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                         "Outbound quota configure for network `%s' is %llu\n",
                         GNUNET_NT_to_string(c),
                         out_dest[c]);
            }
          GNUNET_free(quota_out_str);
        }
      else
        {
          GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
                     _("No outbound quota configured for network `%s', assigning default bandwidth %llu\n"),
                     GNUNET_NT_to_string(c),
                     GNUNET_ATS_DefaultBandwidth);
          out_dest[c] = GNUNET_ATS_DefaultBandwidth;
        }

      /* quota in */
      if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string(cfg, "ats", entry_in, &quota_in_str))
        {
          res = GNUNET_NO;
          if (0 == strcmp(quota_in_str, BIG_M_STRING))
            {
              in_dest[c] = GNUNET_ATS_MaxBandwidth;
              res = GNUNET_YES;
            }
          if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_STRINGS_fancy_size_to_bytes(quota_in_str, &in_dest[c])))
            res = GNUNET_YES;
          if ((GNUNET_NO == res) && (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "ats", entry_in, &in_dest[c])))
            res = GNUNET_YES;

          if (GNUNET_NO == res)
            {
              GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                         _("Could not load quota for network `%s':  `%s', assigning default bandwidth %llu\n"),
                         GNUNET_NT_to_string(c),
                         quota_in_str,
                         GNUNET_ATS_DefaultBandwidth);
              in_dest[c] = GNUNET_ATS_DefaultBandwidth;
            }
          else
            {
              GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                         "Inbound quota configured for network `%s' is %llu\n",
                         GNUNET_NT_to_string(c),
                         in_dest[c]);
            }
          GNUNET_free(quota_in_str);
        }
      else
        {
          GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
                     _("No outbound quota configure for network `%s', assigning default bandwidth %llu\n"),
                     GNUNET_NT_to_string(c),
                     GNUNET_ATS_DefaultBandwidth);
          out_dest[c] = GNUNET_ATS_DefaultBandwidth;
        }
      GNUNET_log(GNUNET_ERROR_TYPE_INFO,
                 "Loaded quota for network `%s' (in/out): %llu %llu\n",
                 GNUNET_NT_to_string(c),
                 in_dest[c],
                 out_dest[c]);
      GNUNET_free(entry_out);
      GNUNET_free(entry_in);
    }
  return GNUNET_NT_COUNT;
}


static void
solver_info_cb(void *cls,
               enum GAS_Solver_Operation op,
               enum GAS_Solver_Status stat,
               enum GAS_Solver_Additional_Information add)
{
  char *add_info;

  switch (add)
    {
    case GAS_INFO_NONE:
      add_info = "GAS_INFO_NONE";
      break;

    case GAS_INFO_FULL:
      add_info = "GAS_INFO_MLP_FULL";
      break;

    case GAS_INFO_UPDATED:
      add_info = "GAS_INFO_MLP_UPDATED";
      break;

    case GAS_INFO_PROP_ALL:
      add_info = "GAS_INFO_PROP_ALL";
      break;

    case GAS_INFO_PROP_SINGLE:
      add_info = "GAS_INFO_PROP_SINGLE";
      break;

    default:
      add_info = "INVALID";
      break;
    }

  switch (op)
    {
    case GAS_OP_SOLVE_START:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Solver notifies `%s' with result `%s' `%s'\n", "GAS_OP_SOLVE_START",
                 (GAS_STAT_SUCCESS == stat) ? "SUCCESS" : "FAIL", add_info);
      return;

    case GAS_OP_SOLVE_STOP:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Solver notifies `%s' with result `%s'\n", "GAS_OP_SOLVE_STOP",
                 (GAS_STAT_SUCCESS == stat) ? "SUCCESS" : "FAIL", add_info);
      return;

    case GAS_OP_SOLVE_SETUP_START:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Solver notifies `%s' with result `%s'\n", "GAS_OP_SOLVE_SETUP_START",
                 (GAS_STAT_SUCCESS == stat) ? "SUCCESS" : "FAIL");
      return;

    case GAS_OP_SOLVE_SETUP_STOP:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Solver notifies `%s' with result `%s'\n", "GAS_OP_SOLVE_SETUP_STOP",
                 (GAS_STAT_SUCCESS == stat) ? "SUCCESS" : "FAIL");
      return;

    case GAS_OP_SOLVE_MLP_LP_START:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Solver notifies `%s' with result `%s'\n", "GAS_OP_SOLVE_LP_START",
                 (GAS_STAT_SUCCESS == stat) ? "SUCCESS" : "FAIL");
      return;

    case GAS_OP_SOLVE_MLP_LP_STOP:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Solver notifies `%s' with result `%s'\n", "GAS_OP_SOLVE_LP_STOP",
                 (GAS_STAT_SUCCESS == stat) ? "SUCCESS" : "FAIL");
      return;

    case GAS_OP_SOLVE_MLP_MLP_START:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Solver notifies `%s' with result `%s'\n", "GAS_OP_SOLVE_MLP_START",
                 (GAS_STAT_SUCCESS == stat) ? "SUCCESS" : "FAIL");
      return;

    case GAS_OP_SOLVE_MLP_MLP_STOP:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Solver notifies `%s' with result `%s'\n", "GAS_OP_SOLVE_MLP_STOP",
                 (GAS_STAT_SUCCESS == stat) ? "SUCCESS" : "FAIL");
      return;

    case GAS_OP_SOLVE_UPDATE_NOTIFICATION_START:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Solver notifies `%s' with result `%s'\n", "GAS_OP_SOLVE_UPDATE_NOTIFICATION_START",
                 (GAS_STAT_SUCCESS == stat) ? "SUCCESS" : "FAIL");
      return;

    case GAS_OP_SOLVE_UPDATE_NOTIFICATION_STOP:
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Solver notifies `%s' with result `%s'\n", "GAS_OP_SOLVE_UPDATE_NOTIFICATION_STOP",
                 (GAS_STAT_SUCCESS == stat) ? "SUCCESS" : "FAIL");
      return;

    default:
      break;
    }
}

static void
solver_bandwidth_changed_cb(void *cls, struct ATS_Address *address)
{
  struct GNUNET_TIME_Relative duration;
  struct TestPeer *p;
  static struct PreferenceGenerator *pg;
  uint32_t delta;

  if ((0 == address->assigned_bw_out) && (0 == address->assigned_bw_in))
    {
      GNUNET_log(GNUNET_ERROR_TYPE_INFO,
                 "Solver notified to disconnect peer `%s'\n",
                 GNUNET_i2s(&address->peer));
    }
  p = find_peer_by_pid(&address->peer);
  if (NULL == p)
    return;
  p->assigned_bw_out = address->assigned_bw_out;
  p->assigned_bw_in = address->assigned_bw_in;

  for (pg = pref_gen_head; NULL != pg; pg = pg->next)
    {
      if (pg->peer == p->id)
        {
          duration = GNUNET_TIME_absolute_get_duration(pg->feedback_last_bw_update);
          delta = duration.rel_value_us * pg->last_assigned_bw_out;
          pg->feedback_bw_out_acc += delta;

          delta = duration.rel_value_us * pg->last_assigned_bw_in;
          pg->feedback_bw_in_acc += delta;

          pg->last_assigned_bw_in = address->assigned_bw_in;
          pg->last_assigned_bw_out = address->assigned_bw_out;
          pg->feedback_last_bw_update = GNUNET_TIME_absolute_get();
        }
    }

  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "Bandwidth changed addresses %s %p to %u Bps out / %u Bps in\n",
             GNUNET_i2s(&address->peer),
             address,
             address->assigned_bw_out,
             address->assigned_bw_in);

  if (NULL != l)
    GNUNET_ATS_solver_logging_now(l);

  return;
}

const double *
get_preferences_cb(void *cls, const struct GNUNET_PeerIdentity *id)
{
  struct TestPeer *p;

  if (GNUNET_YES == opt_disable_normalization)
    {
      if (NULL == (p = find_peer_by_pid(id)))
        return NULL;
      return p->pref_abs;
    }
  else
    return GAS_preference_get_by_peer(NULL,
                                      id);
}


struct SolverHandle *
GNUNET_ATS_solvers_solver_start(enum GNUNET_ATS_Solvers type)
{
  struct SolverHandle *sh;
  char * solver_str;

  switch (type)
    {
    case GNUNET_ATS_SOLVER_PROPORTIONAL:
      solver_str = "proportional";
      break;

    case GNUNET_ATS_SOLVER_MLP:
      solver_str = "mlp";
      break;

    case GNUNET_ATS_SOLVER_RIL:
      solver_str = "ril";
      break;

    default:
      GNUNET_break(0);
      return NULL;
      break;
    }

  sh = GNUNET_new(struct SolverHandle);
  GNUNET_asprintf(&sh->plugin,
                  "libgnunet_plugin_ats_%s",
                  solver_str);
  sh->addresses = GNUNET_CONTAINER_multipeermap_create(128, GNUNET_NO);

  /* setup environment */
  sh->env.cfg = e->cfg;
  sh->env.stats = GNUNET_STATISTICS_create("ats", e->cfg);
  sh->env.addresses = sh->addresses;
  sh->env.bandwidth_changed_cb = &solver_bandwidth_changed_cb;
  sh->env.get_preferences = &get_preferences_cb;
  sh->env.network_count = GNUNET_NT_COUNT;
  sh->env.info_cb = &solver_info_cb;
  sh->env.network_count = GNUNET_NT_COUNT;

  /* start normalization */
  GAS_normalization_start();

  /* load quotas */
  if (GNUNET_NT_COUNT != GNUNET_ATS_solvers_load_quotas(e->cfg,
                                                        sh->env.out_quota, sh->env.in_quota, GNUNET_NT_COUNT))
    {
      GNUNET_break(0);
      GNUNET_free(sh->plugin);
      GNUNET_free(sh);
      end_now();
      return NULL;
    }

  sh->sf = GNUNET_PLUGIN_load(sh->plugin, &sh->env);
  if (NULL == sh->sf)
    {
      fprintf(stderr, "Failed to load solver `%s'\n", sh->plugin);
      GNUNET_break(0);
      GNUNET_free(sh->plugin);
      GNUNET_free(sh);
      end_now();
      return NULL;
    }
  return sh;
}


static void
done()
{
  struct TestPeer *cur;
  struct TestPeer *next;

  struct TestAddress *cur_a;
  struct TestAddress *next_a;

  /* Stop logging */
  GNUNET_ATS_solver_logging_stop(l);

  /* Stop all preference generation */
  GNUNET_ATS_solver_generate_preferences_stop_all();

  /* Stop all property generation */
  GNUNET_ATS_solver_generate_property_stop_all();

  if (opt_print)
    {
      GNUNET_log(GNUNET_ERROR_TYPE_INFO, "== Printing log information \n");
      GNUNET_ATS_solver_logging_eval(l);
    }
  if (opt_save)
    {
      GNUNET_log(GNUNET_ERROR_TYPE_INFO, "== Saving log information \n");
      GNUNET_ATS_solver_logging_write_to_disk(l, e->log_append_time_stamp,
                                              e->log_output_dir);
    }

  if (NULL != l)
    {
      GNUNET_ATS_solver_logging_free(l);
      l = NULL;
    }

  /* Clean up experiment */
  if (NULL != e)
    {
      GNUNET_ATS_solvers_experimentation_stop(e);
      e = NULL;
    }

  next = peer_head;
  while (NULL != (cur = next))
    {
      next = cur->next;
      GNUNET_CONTAINER_DLL_remove(peer_head, peer_tail, cur);
      next_a = cur->addr_head;
      while (NULL != (cur_a = next_a))
        {
          next_a = cur_a->next;
          GNUNET_CONTAINER_DLL_remove(cur->addr_head, cur->addr_tail, cur_a);
          GNUNET_free(cur_a);
        }
      GNUNET_free(cur);
    }
  if (NULL != sh)
    {
      GNUNET_ATS_solvers_solver_stop(sh);
      sh = NULL;
    }

  /* Shutdown */
  end_now();
}

static void
experiment_done_cb(struct Experiment *e, struct GNUNET_TIME_Relative duration, int success)
{
  if (GNUNET_OK == success)
    GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Experiment done successful in %s\n",
               GNUNET_STRINGS_relative_time_to_string(duration, GNUNET_YES));
  else
    GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Experiment failed \n");

  GNUNET_SCHEDULER_add_now(&done, NULL);
}

static void
episode_done_cb(struct Episode *ep)
{
  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Episode %u done\n", ep->id);
}



static void
end_now()
{
  if (NULL != e)
    {
      GNUNET_ATS_solvers_experimentation_stop(e);
      e = NULL;
    }
  if (NULL != sh)
    {
      GNUNET_ATS_solvers_solver_stop(sh);
      sh = NULL;
    }
}

static void
run(void *cls, char * const *args, const char *cfgfile,
    const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  enum GNUNET_ATS_Solvers solver;
  int c;

  if (NULL == opt_exp_file)
    {
      fprintf(stderr, "No experiment given ...\n");
      res = 1;
      end_now();
      return;
    }

  if (NULL == opt_solver)
    {
      fprintf(stderr, "No solver given ...\n");
      res = 1;
      end_now();
      return;
    }

  if (0 == strcmp(opt_solver, "mlp"))
    {
      solver = GNUNET_ATS_SOLVER_MLP;
    }
  else if (0 == strcmp(opt_solver, "proportional"))
    {
      solver = GNUNET_ATS_SOLVER_PROPORTIONAL;
    }
  else if (0 == strcmp(opt_solver, "ril"))
    {
      solver = GNUNET_ATS_SOLVER_RIL;
    }
  else
    {
      fprintf(stderr, "No solver given ...");
      res = 1;
      end_now();
      return;
    }

  for (c = 0; c < GNUNET_ATS_PropertyCount; c++)
    default_properties[c] = DEFAULT_REL_QUALITY;

  for (c = 0; c < GNUNET_ATS_PreferenceCount; c++)
    default_preferences[c] = DEFAULT_REL_PREFERENCE;

  /* load experiment */
  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "=== Loading experiment\n");
  e = GNUNET_ATS_solvers_experimentation_load(opt_exp_file);
  if (NULL == e)
    {
      fprintf(stderr, "Failed to load experiment ...\n");
      res = 1;
      end_now();
      return;
    }

  /* load solver */
  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "=== Loading solver\n");
  sh = GNUNET_ATS_solvers_solver_start(solver);
  if (NULL == sh)
    {
      fprintf(stderr, "Failed to start solver ...\n");
      end_now();
      res = 1;
      return;
    }

  /* start logging */
  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "=== Start logging \n");
  l = GNUNET_ATS_solver_logging_start(e->log_freq);

  /* run experiment */
  GNUNET_log(GNUNET_ERROR_TYPE_INFO, "=== Running experiment \n");
  GNUNET_ATS_solvers_experimentation_run(e, episode_done_cb,
                                         experiment_done_cb);

  /* WAIT */
}


int
main(int argc, char *argv[])
{
  opt_exp_file = NULL;
  opt_solver = NULL;
  opt_log = GNUNET_NO;
  opt_save = GNUNET_NO;

  res = 0;

  static struct GNUNET_GETOPT_CommandLineOption options[] =
  {
    GNUNET_GETOPT_option_string('s',
                                "solver",
                                gettext_noop("solver to use"),
                                &opt_solver),

    GNUNET_GETOPT_option_string('e',
                                "experiment"
                                gettext_noop("experiment to use"),
                                &opt_exp_file),

    GNUNET_GETOPT_option_verbose(&opt_verbose),

    GNUNET_GETOPT_option_flag('p',
                              "print",
                              gettext_noop("print logging"),
                              &opt_print),

    GNUNET_GETOPT_option_flag('f',
                              "file",
                              gettext_noop("save logging to disk"),
                              &opt_save),

    GNUNET_GETOPT_option_flag('d',
                              "dn",
                              gettext_noop("disable normalization"),
                              &opt_disable_normalization),

    GNUNET_GETOPT_OPTION_END
  };

  GNUNET_PROGRAM_run(argc, argv, "gnunet-ats-solver-eval",
                     NULL, options, &run, argv[0]);

  return res;
}
/* end of file ats-testing-experiment.c*/