gnunet-service-rps.c

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/*
     This file is part of GNUnet.
     Copyright (C) 2013-2015 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_applications.h"
#include "gnunet_util_lib.h"
#include "gnunet_cadet_service.h"
#include "gnunet_core_service.h"
#include "gnunet_peerinfo_service.h"
#include "gnunet_nse_service.h"
#include "gnunet_statistics_service.h"
#include "rps.h"
#include "rps-test_util.h"
#include "gnunet-service-rps_sampler.h"
#include "gnunet-service-rps_custommap.h"
#include "gnunet-service-rps_view.h"

#include <math.h>
#include <inttypes.h>
#include <string.h>

#define LOG(kind, ...) GNUNET_log(kind, __VA_ARGS__)

// TODO check for overflows

// TODO align message structs

// TODO connect to friends

// TODO blacklist? (-> mal peer detection on top of brahms)

// hist_size_init, hist_size_max

/***********************************************************************
* Old gnunet-service-rps_peers.c
***********************************************************************/

#define SET_PEER_FLAG(peer_ctx, mask) ((peer_ctx->peer_flags) |= (mask))

#define check_peer_flag_set(peer_ctx, mask) \
  ((peer_ctx->peer_flags) & (mask) ? GNUNET_YES : GNUNET_NO)

#define UNSET_PEER_FLAG(peer_ctx, mask) ((peer_ctx->peer_flags) &= ~(mask))

#define check_channel_flag_set(channel_flags, mask) \
  ((*channel_flags) & (mask) ? GNUNET_YES : GNUNET_NO)

#define unset_channel_flag(channel_flags, mask) ((*channel_flags) &= ~(mask))



struct PeerPendingOp {
  PeerOp op;

  void *op_cls;
};

struct PendingMessage {
  struct PendingMessage *next;
  struct PendingMessage *prev;

  struct GNUNET_MQ_Envelope *ev;

  struct PeerContext *peer_ctx;

  const char *type;
};

struct ChannelCtx;

struct PeerContext {
  struct Sub *sub;

  struct GNUNET_MQ_Handle *mq;

  struct ChannelCtx *send_channel_ctx;

  struct ChannelCtx *recv_channel_ctx;

  struct PeerPendingOp *pending_ops;

  struct PendingMessage *online_check_pending;

  unsigned int num_pending_ops;

  struct GNUNET_PeerIdentity peer_id;

  uint32_t peer_flags;

  struct GNUNET_TIME_Absolute last_message_recv;

  struct GNUNET_TIME_Absolute last_keepalive;

  struct PendingMessage *pending_messages_head;
  struct PendingMessage *pending_messages_tail;

  uint32_t round_pull_req;
};

struct PeersIteratorCls {
  PeersIterator iterator;

  void *cls;
};

struct ChannelCtx {
  struct GNUNET_CADET_Channel *channel;

  struct PeerContext *peer_ctx;

  struct GNUNET_SCHEDULER_Task *destruction_task;
};


#if ENABLE_MALICIOUS

struct AttackedPeer {
  struct AttackedPeer *next;
  struct AttackedPeer *prev;

  struct GNUNET_PeerIdentity peer_id;
};

#endif /* ENABLE_MALICIOUS */

#define HISTOGRAM_FILE_SLOTS 32

#define SIZE_DUMP_FILE (HISTOGRAM_FILE_SLOTS * 5) + 1

struct Sub {
  struct GNUNET_HashCode hash;

  struct GNUNET_CADET_Port *cadet_port;

  struct GNUNET_CONTAINER_MultiPeerMap *valid_peers;

  char *filename_valid_peers;

  struct GNUNET_CONTAINER_MultiPeerMap *peer_map;

  unsigned int sampler_size_est_min;

  unsigned int sampler_size_est_need;

  struct GNUNET_TIME_Relative round_interval;

  struct RPS_Sampler *sampler;

#ifdef TO_FILE_FULL

  char *file_name_view_log;
#endif /* TO_FILE_FULL */

#ifdef TO_FILE
#ifdef TO_FILE_FULL

  char *file_name_observed_log;
#endif /* TO_FILE_FULL */

  uint32_t num_observed_peers;

  struct GNUNET_CONTAINER_MultiPeerMap *observed_unique_peers;
#endif /* TO_FILE */

  struct CustomPeerMap *push_map;

  struct CustomPeerMap *pull_map;

  unsigned int view_size_est_need;

  unsigned int view_size_est_min;

  struct View *view;

  struct GNUNET_SCHEDULER_Task *do_round_task;

  /* === stats === */

  uint32_t num_rounds;

  uint32_t push_recv[HISTOGRAM_FILE_SLOTS];

  uint32_t push_delta[HISTOGRAM_FILE_SLOTS];

  uint32_t pull_delays[HISTOGRAM_FILE_SLOTS];
};


/***********************************************************************
* Globals
***********************************************************************/

static const struct GNUNET_CONFIGURATION_Handle *cfg;

struct GNUNET_STATISTICS_Handle *stats;

struct GNUNET_CADET_Handle *cadet_handle;

struct GNUNET_CORE_Handle *core_handle;

struct GNUNET_CONTAINER_MultiPeerMap *map_single_hop;

static struct GNUNET_PeerIdentity own_identity;

static float alpha;

static float beta;

static struct GNUNET_NSE_Handle *nse;

static struct GNUNET_PEERINFO_Handle *peerinfo_handle;

static struct GNUNET_PEERINFO_NotifyContext *peerinfo_notify_handle;


#if ENABLE_MALICIOUS

static uint32_t mal_type;

static struct GNUNET_PeerIdentity *mal_peers;

static struct GNUNET_CONTAINER_MultiPeerMap *mal_peer_set;

static uint32_t num_mal_peers;


static struct AttackedPeer *att_peers_head;
static struct AttackedPeer *att_peers_tail;

static struct AttackedPeer *att_peer_index;

static struct GNUNET_CONTAINER_MultiPeerMap *att_peer_set;

static uint32_t num_attacked_peers;

static struct GNUNET_PeerIdentity attacked_peer;

static uint32_t push_limit = 10000;
#endif /* ENABLE_MALICIOUS */

static struct Sub *msub;

static const uint32_t num_valid_peers_max = UINT32_MAX;

/***********************************************************************
* /Globals
***********************************************************************/


static void
do_round(void *cls);

static void
do_mal_round(void *cls);


static struct PeerContext *
get_peer_ctx(const struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
             const struct GNUNET_PeerIdentity *peer)
{
  struct PeerContext *ctx;
  int ret;

  ret = GNUNET_CONTAINER_multipeermap_contains(peer_map, peer);
  GNUNET_assert(GNUNET_YES == ret);
  ctx = GNUNET_CONTAINER_multipeermap_get(peer_map, peer);
  GNUNET_assert(NULL != ctx);
  return ctx;
}

static int
check_peer_known(const struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
                 const struct GNUNET_PeerIdentity *peer)
{
  if (NULL != peer_map)
    {
      return GNUNET_CONTAINER_multipeermap_contains(peer_map, peer);
    }
  else
    {
      return GNUNET_NO;
    }
}


static struct PeerContext *
create_peer_ctx(struct Sub *sub,
                const struct GNUNET_PeerIdentity *peer)
{
  struct PeerContext *ctx;
  int ret;

  GNUNET_assert(GNUNET_NO == check_peer_known(sub->peer_map, peer));

  ctx = GNUNET_new(struct PeerContext);
  ctx->peer_id = *peer;
  ctx->sub = sub;
  ret = GNUNET_CONTAINER_multipeermap_put(sub->peer_map, peer, ctx,
                                          GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
  GNUNET_assert(GNUNET_OK == ret);
  if (sub == msub)
    {
      GNUNET_STATISTICS_set(stats,
                            "# known peers",
                            GNUNET_CONTAINER_multipeermap_size(sub->peer_map),
                            GNUNET_NO);
    }
  return ctx;
}


static struct PeerContext *
create_or_get_peer_ctx(struct Sub *sub,
                       const struct GNUNET_PeerIdentity *peer)
{
  if (GNUNET_NO == check_peer_known(sub->peer_map, peer))
    {
      return create_peer_ctx(sub, peer);
    }
  return get_peer_ctx(sub->peer_map, peer);
}


static int
check_connected(struct PeerContext *peer_ctx)
{
  /* If we don't know about this peer we don't know whether it's online */
  if (GNUNET_NO == check_peer_known(peer_ctx->sub->peer_map,
                                    &peer_ctx->peer_id))
    {
      return GNUNET_NO;
    }
  /* Get the context */
  peer_ctx = get_peer_ctx(peer_ctx->sub->peer_map, &peer_ctx->peer_id);
  /* If we have no channel to this peer we don't know whether it's online */
  if ((NULL == peer_ctx->send_channel_ctx) &&
      (NULL == peer_ctx->recv_channel_ctx))
    {
      UNSET_PEER_FLAG(peer_ctx, Peers_ONLINE);
      return GNUNET_NO;
    }
  /* Otherwise (if we have a channel, we know that it's online */
  SET_PEER_FLAG(peer_ctx, Peers_ONLINE);
  return GNUNET_YES;
}


struct GetRandPeerIteratorCls {
  uint32_t index;

  const struct GNUNET_PeerIdentity *peer;
};


static int
get_rand_peer_iterator(void *cls,
                       const struct GNUNET_PeerIdentity *peer,
                       void *value)
{
  struct GetRandPeerIteratorCls *iterator_cls = cls;

  (void)value;

  if (0 >= iterator_cls->index)
    {
      iterator_cls->peer = peer;
      return GNUNET_NO;
    }
  iterator_cls->index--;
  return GNUNET_YES;
}


static const struct GNUNET_PeerIdentity *
get_random_peer_from_peermap(struct GNUNET_CONTAINER_MultiPeerMap *valid_peers)
{
  struct GetRandPeerIteratorCls *iterator_cls;
  const struct GNUNET_PeerIdentity *ret;

  iterator_cls = GNUNET_new(struct GetRandPeerIteratorCls);
  iterator_cls->index = GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK,
                                                 GNUNET_CONTAINER_multipeermap_size(valid_peers));
  (void)GNUNET_CONTAINER_multipeermap_iterate(valid_peers,
                                              get_rand_peer_iterator,
                                              iterator_cls);
  ret = iterator_cls->peer;
  GNUNET_free(iterator_cls);
  return ret;
}


static int
add_valid_peer(const struct GNUNET_PeerIdentity *peer,
               struct GNUNET_CONTAINER_MultiPeerMap *valid_peers)
{
  const struct GNUNET_PeerIdentity *rand_peer;
  int ret;

  ret = GNUNET_YES;
  /* Remove random peers until there is space for a new one */
  while (num_valid_peers_max <=
         GNUNET_CONTAINER_multipeermap_size(valid_peers))
    {
      rand_peer = get_random_peer_from_peermap(valid_peers);
      GNUNET_CONTAINER_multipeermap_remove_all(valid_peers, rand_peer);
      ret = GNUNET_NO;
    }
  (void)GNUNET_CONTAINER_multipeermap_put(valid_peers, peer, NULL,
                                          GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
  if (valid_peers == msub->valid_peers)
    {
      GNUNET_STATISTICS_set(stats,
                            "# valid peers",
                            GNUNET_CONTAINER_multipeermap_size(valid_peers),
                            GNUNET_NO);
    }
  return ret;
}

static void
remove_pending_message(struct PendingMessage *pending_msg, int cancel);

static void
set_peer_online(struct PeerContext *peer_ctx)
{
  struct GNUNET_PeerIdentity *peer;
  unsigned int i;

  peer = &peer_ctx->peer_id;
  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Peer %s is online and valid, calling %i pending operations on it\n",
      GNUNET_i2s(peer),
      peer_ctx->num_pending_ops);

  if (NULL != peer_ctx->online_check_pending)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Removing pending online check for peer %s\n",
          GNUNET_i2s(&peer_ctx->peer_id));
      // TODO wait until cadet sets mq->cancel_impl
      //GNUNET_MQ_send_cancel (peer_ctx->online_check_pending->ev);
      remove_pending_message(peer_ctx->online_check_pending, GNUNET_YES);
      peer_ctx->online_check_pending = NULL;
    }

  SET_PEER_FLAG(peer_ctx, Peers_ONLINE);

  /* Call pending operations */
  for (i = 0; i < peer_ctx->num_pending_ops; i++)
    {
      peer_ctx->pending_ops[i].op(peer_ctx->pending_ops[i].op_cls, peer);
    }
  GNUNET_array_grow(peer_ctx->pending_ops, peer_ctx->num_pending_ops, 0);
}

static void
cleanup_destroyed_channel(void *cls,
                          const struct GNUNET_CADET_Channel *channel);

/* Declaration of handlers */
static void
handle_peer_check(void *cls,
                  const struct GNUNET_MessageHeader *msg);

static void
handle_peer_push(void *cls,
                 const struct GNUNET_MessageHeader *msg);

static void
handle_peer_pull_request(void *cls,
                         const struct GNUNET_MessageHeader *msg);

static int
check_peer_pull_reply(void *cls,
                      const struct GNUNET_RPS_P2P_PullReplyMessage *msg);

static void
handle_peer_pull_reply(void *cls,
                       const struct GNUNET_RPS_P2P_PullReplyMessage *msg);

/* End declaration of handlers */

static struct ChannelCtx *
add_channel_ctx(struct PeerContext *peer_ctx)
{
  struct ChannelCtx *channel_ctx;

  channel_ctx = GNUNET_new(struct ChannelCtx);
  channel_ctx->peer_ctx = peer_ctx;
  return channel_ctx;
}


static void
remove_channel_ctx(struct ChannelCtx *channel_ctx)
{
  struct PeerContext *peer_ctx = channel_ctx->peer_ctx;

  if (NULL != channel_ctx->destruction_task)
    {
      GNUNET_SCHEDULER_cancel(channel_ctx->destruction_task);
      channel_ctx->destruction_task = NULL;
    }

  GNUNET_free(channel_ctx);

  if (NULL == peer_ctx)
    return;
  if (channel_ctx == peer_ctx->send_channel_ctx)
    {
      peer_ctx->send_channel_ctx = NULL;
      peer_ctx->mq = NULL;
    }
  else if (channel_ctx == peer_ctx->recv_channel_ctx)
    {
      peer_ctx->recv_channel_ctx = NULL;
    }
}


struct GNUNET_CADET_Channel *
get_channel(struct PeerContext *peer_ctx)
{
  /* There exists a copy-paste-clone in run() */
  struct GNUNET_MQ_MessageHandler cadet_handlers[] = {
    GNUNET_MQ_hd_fixed_size(peer_check,
                            GNUNET_MESSAGE_TYPE_RPS_PP_CHECK_LIVE,
                            struct GNUNET_MessageHeader,
                            NULL),
    GNUNET_MQ_hd_fixed_size(peer_push,
                            GNUNET_MESSAGE_TYPE_RPS_PP_PUSH,
                            struct GNUNET_MessageHeader,
                            NULL),
    GNUNET_MQ_hd_fixed_size(peer_pull_request,
                            GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
                            struct GNUNET_MessageHeader,
                            NULL),
    GNUNET_MQ_hd_var_size(peer_pull_reply,
                          GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY,
                          struct GNUNET_RPS_P2P_PullReplyMessage,
                          NULL),
    GNUNET_MQ_handler_end()
  };


  if (NULL == peer_ctx->send_channel_ctx)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Trying to establish channel to peer %s\n",
          GNUNET_i2s(&peer_ctx->peer_id));
      peer_ctx->send_channel_ctx = add_channel_ctx(peer_ctx);
      peer_ctx->send_channel_ctx->channel =
        GNUNET_CADET_channel_create(cadet_handle,
                                    peer_ctx->send_channel_ctx, /* context */
                                    &peer_ctx->peer_id,
                                    &peer_ctx->sub->hash,
                                    NULL, /* WindowSize handler */
                                    &cleanup_destroyed_channel, /* Disconnect handler */
                                    cadet_handlers);
    }
  GNUNET_assert(NULL != peer_ctx->send_channel_ctx);
  GNUNET_assert(NULL != peer_ctx->send_channel_ctx->channel);
  return peer_ctx->send_channel_ctx->channel;
}


static struct GNUNET_MQ_Handle *
get_mq(struct PeerContext *peer_ctx)
{
  if (NULL == peer_ctx->mq)
    {
      peer_ctx->mq = GNUNET_CADET_get_mq(get_channel(peer_ctx));
    }
  return peer_ctx->mq;
}

static struct PendingMessage *
insert_pending_message(struct PeerContext *peer_ctx,
                       struct GNUNET_MQ_Envelope *ev,
                       const char *type)
{
  struct PendingMessage *pending_msg;

  pending_msg = GNUNET_new(struct PendingMessage);
  pending_msg->ev = ev;
  pending_msg->peer_ctx = peer_ctx;
  pending_msg->type = type;
  GNUNET_CONTAINER_DLL_insert(peer_ctx->pending_messages_head,
                              peer_ctx->pending_messages_tail,
                              pending_msg);
  return pending_msg;
}


static void
remove_pending_message(struct PendingMessage *pending_msg, int cancel)
{
  struct PeerContext *peer_ctx;

  (void)cancel;

  peer_ctx = pending_msg->peer_ctx;
  GNUNET_assert(NULL != peer_ctx);
  GNUNET_CONTAINER_DLL_remove(peer_ctx->pending_messages_head,
                              peer_ctx->pending_messages_tail,
                              pending_msg);
  // TODO wait for the cadet implementation of message cancellation
  //if (GNUNET_YES == cancel)
  //{
  //  GNUNET_MQ_send_cancel (pending_msg->ev);
  //}
  GNUNET_free(pending_msg);
}


static void
mq_online_check_successful(void *cls)
{
  struct PeerContext *peer_ctx = cls;

  if (NULL != peer_ctx->online_check_pending)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Online check for peer %s was successfull\n",
          GNUNET_i2s(&peer_ctx->peer_id));
      remove_pending_message(peer_ctx->online_check_pending, GNUNET_YES);
      peer_ctx->online_check_pending = NULL;
      set_peer_online(peer_ctx);
      (void)add_valid_peer(&peer_ctx->peer_id, peer_ctx->sub->valid_peers);
    }
}

static void
check_peer_online(struct PeerContext *peer_ctx)
{
  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Get informed about peer %s getting online\n",
      GNUNET_i2s(&peer_ctx->peer_id));

  struct GNUNET_MQ_Handle *mq;
  struct GNUNET_MQ_Envelope *ev;

  ev = GNUNET_MQ_msg_header(GNUNET_MESSAGE_TYPE_RPS_PP_CHECK_LIVE);
  peer_ctx->online_check_pending =
    insert_pending_message(peer_ctx, ev, "Check online");
  mq = get_mq(peer_ctx);
  GNUNET_MQ_notify_sent(ev,
                        mq_online_check_successful,
                        peer_ctx);
  GNUNET_MQ_send(mq, ev);
  if (peer_ctx->sub == msub)
    {
      GNUNET_STATISTICS_update(stats,
                               "# pending online checks",
                               1,
                               GNUNET_NO);
    }
}


static int
check_operation_scheduled(const struct PeerContext *peer_ctx,
                          const PeerOp peer_op)
{
  unsigned int i;

  for (i = 0; i < peer_ctx->num_pending_ops; i++)
    if (peer_op == peer_ctx->pending_ops[i].op)
      return GNUNET_YES;
  return GNUNET_NO;
}


static void
destroy_channel(struct ChannelCtx *channel_ctx)
{
  struct GNUNET_CADET_Channel *channel;

  if (NULL != channel_ctx->destruction_task)
    {
      GNUNET_SCHEDULER_cancel(channel_ctx->destruction_task);
      channel_ctx->destruction_task = NULL;
    }
  GNUNET_assert(channel_ctx->channel != NULL);
  channel = channel_ctx->channel;
  channel_ctx->channel = NULL;
  GNUNET_CADET_channel_destroy(channel);
  remove_channel_ctx(channel_ctx);
}


static void
destroy_channel_cb(void *cls)
{
  struct ChannelCtx *channel_ctx = cls;

  channel_ctx->destruction_task = NULL;
  destroy_channel(channel_ctx);
}


static void
schedule_channel_destruction(struct ChannelCtx *channel_ctx)
{
  GNUNET_assert(NULL ==
                channel_ctx->destruction_task);
  GNUNET_assert(NULL !=
                channel_ctx->channel);
  channel_ctx->destruction_task =
    GNUNET_SCHEDULER_add_now(&destroy_channel_cb,
                             channel_ctx);
}


static int
destroy_peer(struct PeerContext *peer_ctx)
{
  GNUNET_assert(NULL != peer_ctx);
  GNUNET_assert(NULL != peer_ctx->sub->peer_map);
  if (GNUNET_NO ==
      GNUNET_CONTAINER_multipeermap_contains(peer_ctx->sub->peer_map,
                                             &peer_ctx->peer_id))
    {
      return GNUNET_NO;
    }
  SET_PEER_FLAG(peer_ctx, Peers_TO_DESTROY);
  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Going to remove peer %s\n",
      GNUNET_i2s(&peer_ctx->peer_id));
  UNSET_PEER_FLAG(peer_ctx, Peers_ONLINE);

  /* Clear list of pending operations */
  // TODO this probably leaks memory
  //      ('only' the cls to the function. Not sure what to do with it)
  GNUNET_array_grow(peer_ctx->pending_ops,
                    peer_ctx->num_pending_ops,
                    0);
  /* Remove all pending messages */
  while (NULL != peer_ctx->pending_messages_head)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Removing unsent %s\n",
          peer_ctx->pending_messages_head->type);
      /* Cancle pending message, too */
      if ((NULL != peer_ctx->online_check_pending) &&
          (0 == memcmp(peer_ctx->pending_messages_head,
                       peer_ctx->online_check_pending,
                       sizeof(struct PendingMessage))))
        {
          peer_ctx->online_check_pending = NULL;
          if (peer_ctx->sub == msub)
            {
              GNUNET_STATISTICS_update(stats,
                                       "# pending online checks",
                                       -1,
                                       GNUNET_NO);
            }
        }
      remove_pending_message(peer_ctx->pending_messages_head,
                             GNUNET_YES);
    }

  /* If we are still waiting for notification whether this peer is online
   * cancel the according task */
  if (NULL != peer_ctx->online_check_pending)
    {
      GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
                 "Removing pending online check for peer %s\n",
                 GNUNET_i2s(&peer_ctx->peer_id));
      // TODO wait until cadet sets mq->cancel_impl
      //GNUNET_MQ_send_cancel (peer_ctx->online_check_pending->ev);
      remove_pending_message(peer_ctx->online_check_pending,
                             GNUNET_YES);
      peer_ctx->online_check_pending = NULL;
    }

  if (NULL != peer_ctx->send_channel_ctx)
    {
      /* This is possibly called from within channel destruction */
      peer_ctx->send_channel_ctx->peer_ctx = NULL;
      schedule_channel_destruction(peer_ctx->send_channel_ctx);
      peer_ctx->send_channel_ctx = NULL;
      peer_ctx->mq = NULL;
    }
  if (NULL != peer_ctx->recv_channel_ctx)
    {
      /* This is possibly called from within channel destruction */
      peer_ctx->recv_channel_ctx->peer_ctx = NULL;
      schedule_channel_destruction(peer_ctx->recv_channel_ctx);
      peer_ctx->recv_channel_ctx = NULL;
    }

  if (GNUNET_YES !=
      GNUNET_CONTAINER_multipeermap_remove_all(peer_ctx->sub->peer_map,
                                               &peer_ctx->peer_id))
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "removing peer from peer_ctx->sub->peer_map failed\n");
    }
  if (peer_ctx->sub == msub)
    {
      GNUNET_STATISTICS_set(stats,
                            "# known peers",
                            GNUNET_CONTAINER_multipeermap_size(peer_ctx->sub->peer_map),
                            GNUNET_NO);
    }
  GNUNET_free(peer_ctx);
  return GNUNET_YES;
}


static int
peermap_clear_iterator(void *cls,
                       const struct GNUNET_PeerIdentity *key,
                       void *value)
{
  struct Sub *sub = cls;

  (void)value;

  destroy_peer(get_peer_ctx(sub->peer_map, key));
  return GNUNET_YES;
}


static void
mq_notify_sent_cb(void *cls)
{
  struct PendingMessage *pending_msg = (struct PendingMessage *)cls;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "%s was sent.\n",
      pending_msg->type);
  if (pending_msg->peer_ctx->sub == msub)
    {
      if (0 == strncmp("PULL REPLY", pending_msg->type, 10))
        GNUNET_STATISTICS_update(stats, "# pull replys sent", 1, GNUNET_NO);
      if (0 == strncmp("PULL REQUEST", pending_msg->type, 12))
        GNUNET_STATISTICS_update(stats, "# pull requests sent", 1, GNUNET_NO);
      if (0 == strncmp("PUSH", pending_msg->type, 4))
        GNUNET_STATISTICS_update(stats, "# pushes sent", 1, GNUNET_NO);
      if (0 == strncmp("PULL REQUEST", pending_msg->type, 12) &&
          NULL != map_single_hop &&
          GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains(map_single_hop,
                                                              &pending_msg->peer_ctx->peer_id))
        GNUNET_STATISTICS_update(stats,
                                 "# pull requests sent (multi-hop peer)",
                                 1,
                                 GNUNET_NO);
    }
  /* Do not cancle message */
  remove_pending_message(pending_msg, GNUNET_NO);
}


static int
store_peer_presistently_iterator(void *cls,
                                 const struct GNUNET_PeerIdentity *peer,
                                 void *value)
{
  const struct GNUNET_DISK_FileHandle *fh = cls;
  char peer_string[128];
  int size;
  ssize_t ret;

  (void)value;

  if (NULL == peer)
    {
      return GNUNET_YES;
    }
  size = GNUNET_snprintf(peer_string,
                         sizeof(peer_string),
                         "%s\n",
                         GNUNET_i2s_full(peer));
  GNUNET_assert(53 == size);
  ret = GNUNET_DISK_file_write(fh,
                               peer_string,
                               size);
  GNUNET_assert(size == ret);
  return GNUNET_YES;
}


static void
store_valid_peers(const struct Sub *sub)
{
  struct GNUNET_DISK_FileHandle *fh;
  uint32_t number_written_peers;
  int ret;

  if (0 == strncmp("DISABLE", sub->filename_valid_peers, 7))
    {
      return;
    }

  ret = GNUNET_DISK_directory_create_for_file(sub->filename_valid_peers);
  if (GNUNET_SYSERR == ret)
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Not able to create directory for file `%s'\n",
          sub->filename_valid_peers);
      GNUNET_break(0);
    }
  else if (GNUNET_NO == ret)
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Directory for file `%s' exists but is not writable for us\n",
          sub->filename_valid_peers);
      GNUNET_break(0);
    }
  fh = GNUNET_DISK_file_open(sub->filename_valid_peers,
                             GNUNET_DISK_OPEN_WRITE |
                             GNUNET_DISK_OPEN_CREATE,
                             GNUNET_DISK_PERM_USER_READ |
                             GNUNET_DISK_PERM_USER_WRITE);
  if (NULL == fh)
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Not able to write valid peers to file `%s'\n",
          sub->filename_valid_peers);
      return;
    }
  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Writing %u valid peers to disk\n",
      GNUNET_CONTAINER_multipeermap_size(sub->valid_peers));
  number_written_peers =
    GNUNET_CONTAINER_multipeermap_iterate(sub->valid_peers,
                                          store_peer_presistently_iterator,
                                          fh);
  GNUNET_assert(GNUNET_OK == GNUNET_DISK_file_close(fh));
  GNUNET_assert(number_written_peers ==
                GNUNET_CONTAINER_multipeermap_size(sub->valid_peers));
}


static const struct GNUNET_PeerIdentity *
s2i_full(const char *string_repr)
{
  struct GNUNET_PeerIdentity *peer;
  size_t len;
  int ret;

  peer = GNUNET_new(struct GNUNET_PeerIdentity);
  len = strlen(string_repr);
  if (52 > len)
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Not able to convert string representation of PeerID to PeerID\n"
          "Sting representation: %s (len %lu) - too short\n",
          string_repr,
          len);
      GNUNET_break(0);
    }
  else if (52 < len)
    {
      len = 52;
    }
  ret = GNUNET_CRYPTO_eddsa_public_key_from_string(string_repr,
                                                   len,
                                                   &peer->public_key);
  if (GNUNET_OK != ret)
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Not able to convert string representation of PeerID to PeerID\n"
          "Sting representation: %s\n",
          string_repr);
      GNUNET_break(0);
    }
  return peer;
}


static void
restore_valid_peers(const struct Sub *sub)
{
  off_t file_size;
  uint32_t num_peers;
  struct GNUNET_DISK_FileHandle *fh;
  char *buf;
  ssize_t size_read;
  char *iter_buf;
  char *str_repr;
  const struct GNUNET_PeerIdentity *peer;

  if (0 == strncmp("DISABLE", sub->filename_valid_peers, 7))
    {
      return;
    }

  if (GNUNET_OK != GNUNET_DISK_file_test(sub->filename_valid_peers))
    {
      return;
    }
  fh = GNUNET_DISK_file_open(sub->filename_valid_peers,
                             GNUNET_DISK_OPEN_READ,
                             GNUNET_DISK_PERM_NONE);
  GNUNET_assert(NULL != fh);
  GNUNET_assert(GNUNET_OK == GNUNET_DISK_file_handle_size(fh, &file_size));
  num_peers = file_size / 53;
  buf = GNUNET_malloc(file_size);
  size_read = GNUNET_DISK_file_read(fh, buf, file_size);
  GNUNET_assert(size_read == file_size);
  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Restoring %" PRIu32 " peers from file `%s'\n",
      num_peers,
      sub->filename_valid_peers);
  for (iter_buf = buf; iter_buf < buf + file_size - 1; iter_buf += 53)
    {
      str_repr = GNUNET_strndup(iter_buf, 53);
      peer = s2i_full(str_repr);
      GNUNET_free(str_repr);
      add_valid_peer(peer, sub->valid_peers);
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Restored valid peer %s from disk\n",
          GNUNET_i2s_full(peer));
    }
  iter_buf = NULL;
  GNUNET_free(buf);
  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "num_peers: %" PRIu32 ", _size (sub->valid_peers): %u\n",
      num_peers,
      GNUNET_CONTAINER_multipeermap_size(sub->valid_peers));
  if (num_peers != GNUNET_CONTAINER_multipeermap_size(sub->valid_peers))
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Number of restored peers does not match file size. Have probably duplicates.\n");
    }
  GNUNET_assert(GNUNET_OK == GNUNET_DISK_file_close(fh));
  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Restored %u valid peers from disk\n",
      GNUNET_CONTAINER_multipeermap_size(sub->valid_peers));
}


static void
peers_terminate(struct Sub *sub)
{
  if (GNUNET_SYSERR ==
      GNUNET_CONTAINER_multipeermap_iterate(sub->peer_map,
                                            &peermap_clear_iterator,
                                            sub))
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Iteration destroying peers was aborted.\n");
    }
  GNUNET_CONTAINER_multipeermap_destroy(sub->peer_map);
  sub->peer_map = NULL;
  store_valid_peers(sub);
  GNUNET_free(sub->filename_valid_peers);
  sub->filename_valid_peers = NULL;
  GNUNET_CONTAINER_multipeermap_destroy(sub->valid_peers);
  sub->valid_peers = NULL;
}


static int
valid_peer_iterator(void *cls,
                    const struct GNUNET_PeerIdentity *peer,
                    void *value)
{
  struct PeersIteratorCls *it_cls = cls;

  (void)value;

  return it_cls->iterator(it_cls->cls, peer);
}


static int
get_valid_peers(struct GNUNET_CONTAINER_MultiPeerMap *valid_peers,
                PeersIterator iterator,
                void *it_cls)
{
  struct PeersIteratorCls *cls;
  int ret;

  cls = GNUNET_new(struct PeersIteratorCls);
  cls->iterator = iterator;
  cls->cls = it_cls;
  ret = GNUNET_CONTAINER_multipeermap_iterate(valid_peers,
                                              valid_peer_iterator,
                                              cls);
  GNUNET_free(cls);
  return ret;
}


static int
insert_peer(struct Sub *sub,
            const struct GNUNET_PeerIdentity *peer)
{
  if (GNUNET_YES == check_peer_known(sub->peer_map, peer))
    {
      return GNUNET_NO; /* We already know this peer - nothing to do */
    }
  (void)create_peer_ctx(sub, peer);
  return GNUNET_YES;
}


static int
check_peer_flag(const struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
                const struct GNUNET_PeerIdentity *peer,
                enum Peers_PeerFlags flags)
{
  struct PeerContext *peer_ctx;

  if (GNUNET_NO == check_peer_known(peer_map, peer))
    {
      return GNUNET_SYSERR;
    }
  peer_ctx = get_peer_ctx(peer_map, peer);
  return check_peer_flag_set(peer_ctx, flags);
}

static int
issue_peer_online_check(struct Sub *sub,
                        const struct GNUNET_PeerIdentity *peer)
{
  struct PeerContext *peer_ctx;

  (void)insert_peer(sub, peer);   // TODO even needed?
  peer_ctx = get_peer_ctx(sub->peer_map, peer);
  if ((GNUNET_NO == check_peer_flag(sub->peer_map, peer, Peers_ONLINE)) &&
      (NULL == peer_ctx->online_check_pending))
    {
      check_peer_online(peer_ctx);
      return GNUNET_YES;
    }
  return GNUNET_NO;
}


static int
check_removable(const struct PeerContext *peer_ctx)
{
  if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains(peer_ctx->sub->peer_map,
                                                          &peer_ctx->peer_id))
    {
      return GNUNET_SYSERR;
    }

  if ((NULL != peer_ctx->recv_channel_ctx) ||
      (NULL != peer_ctx->pending_messages_head) ||
      (GNUNET_YES == check_peer_flag_set(peer_ctx, Peers_PULL_REPLY_PENDING)))
    {
      return GNUNET_NO;
    }
  return GNUNET_YES;
}


static int
check_peer_valid(const struct GNUNET_CONTAINER_MultiPeerMap *valid_peers,
                 const struct GNUNET_PeerIdentity *peer)
{
  return GNUNET_CONTAINER_multipeermap_contains(valid_peers, peer);
}


static void
indicate_sending_intention(struct PeerContext *peer_ctx)
{
  GNUNET_assert(GNUNET_YES == check_peer_known(peer_ctx->sub->peer_map,
                                               &peer_ctx->peer_id));
  (void)get_channel(peer_ctx);
}


static int
check_peer_send_intention(const struct PeerContext *peer_ctx)
{
  if (NULL != peer_ctx->recv_channel_ctx)
    {
      return GNUNET_YES;
    }
  return GNUNET_NO;
}


static void *
handle_inbound_channel(void *cls,
                       struct GNUNET_CADET_Channel *channel,
                       const struct GNUNET_PeerIdentity *initiator)
{
  struct PeerContext *peer_ctx;
  struct ChannelCtx *channel_ctx;
  struct Sub *sub = cls;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "New channel was established to us (Peer %s).\n",
      GNUNET_i2s(initiator));
  GNUNET_assert(NULL != channel);  /* according to cadet API */
  /* Make sure we 'know' about this peer */
  peer_ctx = create_or_get_peer_ctx(sub, initiator);
  set_peer_online(peer_ctx);
  (void)add_valid_peer(&peer_ctx->peer_id, peer_ctx->sub->valid_peers);
  channel_ctx = add_channel_ctx(peer_ctx);
  channel_ctx->channel = channel;
  /* We only accept one incoming channel per peer */
  if (GNUNET_YES == check_peer_send_intention(get_peer_ctx(sub->peer_map,
                                                           initiator)))
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Already got one receive channel. Destroying old one.\n");
      GNUNET_break_op(0);
      destroy_channel(peer_ctx->recv_channel_ctx);
      peer_ctx->recv_channel_ctx = channel_ctx;
      /* return the channel context */
      return channel_ctx;
    }
  peer_ctx->recv_channel_ctx = channel_ctx;
  return channel_ctx;
}


static int
check_sending_channel_exists(const struct PeerContext *peer_ctx)
{
  if (GNUNET_NO == check_peer_known(peer_ctx->sub->peer_map,
                                    &peer_ctx->peer_id))
    { /* If no such peer exists, there is no channel */
      return GNUNET_NO;
    }
  if (NULL == peer_ctx->send_channel_ctx)
    {
      return GNUNET_NO;
    }
  return GNUNET_YES;
}


static int
destroy_sending_channel(struct PeerContext *peer_ctx)
{
  if (GNUNET_NO == check_peer_known(peer_ctx->sub->peer_map,
                                    &peer_ctx->peer_id))
    {
      return GNUNET_NO;
    }
  if (NULL != peer_ctx->send_channel_ctx)
    {
      destroy_channel(peer_ctx->send_channel_ctx);
      (void)check_connected(peer_ctx);
      return GNUNET_YES;
    }
  return GNUNET_NO;
}

static void
send_message(struct PeerContext *peer_ctx,
             struct GNUNET_MQ_Envelope *ev,
             const char *type)
{
  struct PendingMessage *pending_msg;
  struct GNUNET_MQ_Handle *mq;

  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
             "Sending message to %s of type %s\n",
             GNUNET_i2s(&peer_ctx->peer_id),
             type);
  pending_msg = insert_pending_message(peer_ctx, ev, type);
  mq = get_mq(peer_ctx);
  GNUNET_MQ_notify_sent(ev,
                        mq_notify_sent_cb,
                        pending_msg);
  GNUNET_MQ_send(mq, ev);
}

static int
schedule_operation(struct PeerContext *peer_ctx,
                   const PeerOp peer_op,
                   void *cls)
{
  struct PeerPendingOp pending_op;

  GNUNET_assert(GNUNET_YES == check_peer_known(peer_ctx->sub->peer_map,
                                               &peer_ctx->peer_id));

  //TODO if ONLINE execute immediately

  if (GNUNET_NO == check_operation_scheduled(peer_ctx, peer_op))
    {
      pending_op.op = peer_op;
      pending_op.op_cls = cls;
      GNUNET_array_append(peer_ctx->pending_ops,
                          peer_ctx->num_pending_ops,
                          pending_op);
      return GNUNET_YES;
    }
  return GNUNET_NO;
}

/***********************************************************************
* /Old gnunet-service-rps_peers.c
***********************************************************************/


/***********************************************************************
* Housekeeping with clients
***********************************************************************/

struct ReplyCls {
  struct ReplyCls *next;
  struct ReplyCls *prev;

  uint32_t id;

  struct RPS_SamplerRequestHandle *req_handle;

  struct ClientContext *cli_ctx;
};


struct ClientContext {
  struct ClientContext *next;
  struct ClientContext *prev;

  struct GNUNET_MQ_Handle *mq;

  int64_t view_updates_left;

  int8_t stream_update;

  struct GNUNET_SERVICE_Client *client;

  struct Sub *sub;
};

struct ClientContext *cli_ctx_head;
struct ClientContext *cli_ctx_tail;

/***********************************************************************
* /Housekeeping with clients
***********************************************************************/





/***********************************************************************
* Util functions
***********************************************************************/


static void
print_peer_list(struct GNUNET_PeerIdentity *list,
                unsigned int len)
{
  unsigned int i;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Printing peer list of length %u at %p:\n",
      len,
      list);
  for (i = 0; i < len; i++)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "%u. peer: %s\n",
          i, GNUNET_i2s(&list[i]));
    }
}


static void
rem_from_list(struct GNUNET_PeerIdentity **peer_list,
              unsigned int *list_size,
              const struct GNUNET_PeerIdentity *peer)
{
  unsigned int i;
  struct GNUNET_PeerIdentity *tmp;

  tmp = *peer_list;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Removing peer %s from list at %p\n",
      GNUNET_i2s(peer),
      tmp);

  for (i = 0; i < *list_size; i++)
    {
      if (0 == GNUNET_memcmp(&tmp[i], peer))
        {
          if (i < *list_size - 1)
            { /* Not at the last entry -- shift peers left */
              memmove(&tmp[i], &tmp[i + 1],
                      ((*list_size) - i - 1) * sizeof(struct GNUNET_PeerIdentity));
            }
          /* Remove last entry (should be now useless PeerID) */
          GNUNET_array_grow(tmp, *list_size, (*list_size) - 1);
        }
    }
  *peer_list = tmp;
}


static void
insert_in_view_op(void *cls,
                  const struct GNUNET_PeerIdentity *peer);

static int
insert_in_view(struct Sub *sub,
               const struct GNUNET_PeerIdentity *peer)
{
  struct PeerContext *peer_ctx;
  int online;
  int ret;

  online = check_peer_flag(sub->peer_map, peer, Peers_ONLINE);
  peer_ctx = get_peer_ctx(sub->peer_map, peer);  // TODO indirection needed?
  if ((GNUNET_NO == online) ||
      (GNUNET_SYSERR == online))   /* peer is not even known */
    {
      (void)issue_peer_online_check(sub, peer);
      (void)schedule_operation(peer_ctx, insert_in_view_op, sub);
      return GNUNET_NO;
    }
  /* Open channel towards peer to keep connection open */
  indicate_sending_intention(peer_ctx);
  ret = View_put(sub->view, peer);
  if (peer_ctx->sub == msub)
    {
      GNUNET_STATISTICS_set(stats,
                            "view size",
                            View_size(peer_ctx->sub->view),
                            GNUNET_NO);
    }
  return ret;
}


static void
send_view(const struct ClientContext *cli_ctx,
          const struct GNUNET_PeerIdentity *view_array,
          uint64_t view_size)
{
  struct GNUNET_MQ_Envelope *ev;
  struct GNUNET_RPS_CS_DEBUG_ViewReply *out_msg;
  struct Sub *sub;

  if (NULL == view_array)
    {
      if (NULL == cli_ctx->sub)
        sub = msub;
      else
        sub = cli_ctx->sub;
      view_size = View_size(sub->view);
      view_array = View_get_as_array(sub->view);
    }

  ev = GNUNET_MQ_msg_extra(out_msg,
                           view_size * sizeof(struct GNUNET_PeerIdentity),
                           GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_VIEW_REPLY);
  out_msg->num_peers = htonl(view_size);

  GNUNET_memcpy(&out_msg[1],
                view_array,
                view_size * sizeof(struct GNUNET_PeerIdentity));
  GNUNET_MQ_send(cli_ctx->mq, ev);
}


static void
send_stream_peers(const struct ClientContext *cli_ctx,
                  uint64_t num_peers,
                  const struct GNUNET_PeerIdentity *peers)
{
  struct GNUNET_MQ_Envelope *ev;
  struct GNUNET_RPS_CS_DEBUG_StreamReply *out_msg;

  GNUNET_assert(NULL != peers);

  ev = GNUNET_MQ_msg_extra(out_msg,
                           num_peers * sizeof(struct GNUNET_PeerIdentity),
                           GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_STREAM_REPLY);
  out_msg->num_peers = htonl(num_peers);

  GNUNET_memcpy(&out_msg[1],
                peers,
                num_peers * sizeof(struct GNUNET_PeerIdentity));
  GNUNET_MQ_send(cli_ctx->mq, ev);
}


static void
clients_notify_view_update(const struct Sub *sub)
{
  struct ClientContext *cli_ctx_iter;
  uint64_t num_peers;
  const struct GNUNET_PeerIdentity *view_array;

  num_peers = View_size(sub->view);
  view_array = View_get_as_array(sub->view);
  /* check size of view is small enough */
  if (GNUNET_MAX_MESSAGE_SIZE < num_peers)
    {
      GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
                 "View is too big to send\n");
      return;
    }

  for (cli_ctx_iter = cli_ctx_head;
       NULL != cli_ctx_iter;
       cli_ctx_iter = cli_ctx_iter->next)
    {
      if (1 < cli_ctx_iter->view_updates_left)
        {
          /* Client wants to receive limited amount of updates */
          cli_ctx_iter->view_updates_left -= 1;
        }
      else if (1 == cli_ctx_iter->view_updates_left)
        {
          /* Last update of view for client */
          cli_ctx_iter->view_updates_left = -1;
        }
      else if (0 > cli_ctx_iter->view_updates_left)
        {
          /* Client is not interested in updates */
          continue;
        }
      /* else _updates_left == 0 - infinite amount of updates */

      /* send view */
      send_view(cli_ctx_iter, view_array, num_peers);
    }
}


static void
clients_notify_stream_peer(const struct Sub *sub,
                           uint64_t num_peers,
                           const struct GNUNET_PeerIdentity *peers)
// TODO enum StreamPeerSource)
{
  struct ClientContext *cli_ctx_iter;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Got peer (%s) from biased stream - update all clients\n",
      GNUNET_i2s(peers));

  for (cli_ctx_iter = cli_ctx_head;
       NULL != cli_ctx_iter;
       cli_ctx_iter = cli_ctx_iter->next)
    {
      if (GNUNET_YES == cli_ctx_iter->stream_update &&
          (sub == cli_ctx_iter->sub || sub == msub))
        {
          send_stream_peers(cli_ctx_iter, num_peers, peers);
        }
    }
}


static void
hist_update(const struct GNUNET_PeerIdentity *ids,
            uint32_t num_peers,
            void *cls)
{
  unsigned int i;
  struct Sub *sub = cls;

  for (i = 0; i < num_peers; i++)
    {
      int inserted;
      if (GNUNET_YES != check_peer_known(sub->peer_map, &ids[i]))
        {
          LOG(GNUNET_ERROR_TYPE_WARNING,
              "Peer in history update not known!\n");
          continue;
        }
      inserted = insert_in_view(sub, &ids[i]);
      if (GNUNET_OK == inserted)
        {
          clients_notify_stream_peer(sub, 1, &ids[i]);
        }
#ifdef TO_FILE_FULL
      to_file(sub->file_name_view_log,
              "+%s\t(hist)",
              GNUNET_i2s_full(ids));
#endif /* TO_FILE_FULL */
    }
  clients_notify_view_update(sub);
}


static void
resize_wrapper(struct RPS_Sampler *sampler, uint32_t new_size)
{
  unsigned int sampler_size;

  // TODO statistics
  // TODO respect the min, max
  sampler_size = RPS_sampler_get_size(sampler);
  if (sampler_size > new_size * 4)
    { /* Shrinking */
      RPS_sampler_resize(sampler, sampler_size / 2);
    }
  else if (sampler_size < new_size)
    { /* Growing */
      RPS_sampler_resize(sampler, sampler_size * 2);
    }
  LOG(GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
}


static void
add_peer_array_to_set(const struct GNUNET_PeerIdentity *peer_array,
                      unsigned int num_peers,
                      struct GNUNET_CONTAINER_MultiPeerMap *peer_map)
{
  unsigned int i;

  if (NULL == peer_map)
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Trying to add peers to non-existing peermap.\n");
      return;
    }

  for (i = 0; i < num_peers; i++)
    {
      GNUNET_CONTAINER_multipeermap_put(peer_map,
                                        &peer_array[i],
                                        NULL,
                                        GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
      if (msub->peer_map == peer_map)
        {
          GNUNET_STATISTICS_set(stats,
                                "# known peers",
                                GNUNET_CONTAINER_multipeermap_size(peer_map),
                                GNUNET_NO);
        }
    }
}


static void
send_pull_reply(struct PeerContext *peer_ctx,
                const struct GNUNET_PeerIdentity *peer_ids,
                unsigned int num_peer_ids)
{
  uint32_t send_size;
  struct GNUNET_MQ_Envelope *ev;
  struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;

  /* Compute actual size */
  send_size = sizeof(struct GNUNET_RPS_P2P_PullReplyMessage) +
              num_peer_ids * sizeof(struct GNUNET_PeerIdentity);

  if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
    /* Compute number of peers to send
     * If too long, simply truncate */
    // TODO select random ones via permutation
    //      or even better: do good protocol design
    send_size =
      (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
       sizeof(struct GNUNET_RPS_P2P_PullReplyMessage)) /
      sizeof(struct GNUNET_PeerIdentity);
  else
    send_size = num_peer_ids;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Going to send PULL REPLY with %u peers to %s\n",
      send_size, GNUNET_i2s(&peer_ctx->peer_id));

  ev = GNUNET_MQ_msg_extra(out_msg,
                           send_size * sizeof(struct GNUNET_PeerIdentity),
                           GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
  out_msg->num_peers = htonl(send_size);
  GNUNET_memcpy(&out_msg[1], peer_ids,
                send_size * sizeof(struct GNUNET_PeerIdentity));

  send_message(peer_ctx, ev, "PULL REPLY");
  if (peer_ctx->sub == msub)
    {
      GNUNET_STATISTICS_update(stats, "# pull reply send issued", 1, GNUNET_NO);
    }
  // TODO check with send intention: as send_channel is used/opened we indicate
  // a sending intention without intending it.
  // -> clean peer afterwards?
  // -> use recv_channel?
}


static void
insert_in_pull_map(void *cls,
                   const struct GNUNET_PeerIdentity *peer)
{
  struct Sub *sub = cls;

  CustomPeerMap_put(sub->pull_map, peer);
}


static void
insert_in_view_op(void *cls,
                  const struct GNUNET_PeerIdentity *peer)
{
  struct Sub *sub = cls;
  int inserted;

  inserted = insert_in_view(sub, peer);
  if (GNUNET_OK == inserted)
    {
      clients_notify_stream_peer(sub, 1, peer);
    }
}


static void
insert_in_sampler(void *cls,
                  const struct GNUNET_PeerIdentity *peer)
{
  struct Sub *sub = cls;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Updating samplers with peer %s from insert_in_sampler()\n",
      GNUNET_i2s(peer));
  RPS_sampler_update(sub->sampler, peer);
  if (0 < RPS_sampler_count_id(sub->sampler, peer))
    {
      /* Make sure we 'know' about this peer */
      (void)issue_peer_online_check(sub, peer);
      /* Establish a channel towards that peer to indicate we are going to send
       * messages to it */
      //indicate_sending_intention (peer);
    }
  if (sub == msub)
    {
      GNUNET_STATISTICS_update(stats,
                               "# observed peers in gossip",
                               1,
                               GNUNET_NO);
    }
#ifdef TO_FILE
  sub->num_observed_peers++;
  GNUNET_CONTAINER_multipeermap_put
    (sub->observed_unique_peers,
    peer,
    NULL,
    GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
  uint32_t num_observed_unique_peers =
    GNUNET_CONTAINER_multipeermap_size(sub->observed_unique_peers);
  GNUNET_STATISTICS_set(stats,
                        "# unique peers in gossip",
                        num_observed_unique_peers,
                        GNUNET_NO);
#ifdef TO_FILE_FULL
  to_file(sub->file_name_observed_log,
          "%" PRIu32 " %" PRIu32 " %f\n",
          sub->num_observed_peers,
          num_observed_unique_peers,
          1.0 * num_observed_unique_peers / sub->num_observed_peers)
#endif /* TO_FILE_FULL */
#endif /* TO_FILE */
}


static void
got_peer(struct Sub *sub,
         const struct GNUNET_PeerIdentity *peer)
{
  /* If we did not know this peer already, insert it into sampler and view */
  if (GNUNET_YES == issue_peer_online_check(sub, peer))
    {
      schedule_operation(get_peer_ctx(sub->peer_map, peer),
                         &insert_in_sampler, sub);
      schedule_operation(get_peer_ctx(sub->peer_map, peer),
                         &insert_in_view_op, sub);
    }
  if (sub == msub)
    {
      GNUNET_STATISTICS_update(stats,
                               "# learnd peers",
                               1,
                               GNUNET_NO);
    }
}


static int
check_sending_channel_needed(const struct PeerContext *peer_ctx)
{
  /* struct GNUNET_CADET_Channel *channel; */
  if (GNUNET_NO == check_peer_known(peer_ctx->sub->peer_map,
                                    &peer_ctx->peer_id))
    {
      return GNUNET_NO;
    }
  if (GNUNET_YES == check_sending_channel_exists(peer_ctx))
    {
      if ((0 < RPS_sampler_count_id(peer_ctx->sub->sampler,
                                    &peer_ctx->peer_id)) ||
          (GNUNET_YES == View_contains_peer(peer_ctx->sub->view,
                                            &peer_ctx->peer_id)) ||
          (GNUNET_YES == CustomPeerMap_contains_peer(peer_ctx->sub->push_map,
                                                     &peer_ctx->peer_id)) ||
          (GNUNET_YES == CustomPeerMap_contains_peer(peer_ctx->sub->pull_map,
                                                     &peer_ctx->peer_id)) ||
          (GNUNET_YES == check_peer_flag(peer_ctx->sub->peer_map,
                                         &peer_ctx->peer_id,
                                         Peers_PULL_REPLY_PENDING)))
        { /* If we want to keep the connection to peer open */
          return GNUNET_YES;
        }
      return GNUNET_NO;
    }
  return GNUNET_NO;
}


static void
remove_peer(struct Sub *sub,
            const struct GNUNET_PeerIdentity *peer)
{
  (void)View_remove_peer(sub->view,
                         peer);
  CustomPeerMap_remove_peer(sub->pull_map,
                            peer);
  CustomPeerMap_remove_peer(sub->push_map,
                            peer);
  RPS_sampler_reinitialise_by_value(sub->sampler,
                                    peer);
  /* We want to destroy the peer now.
   * Sometimes, it just seems that it's already been removed from the peer_map,
   * so check the peer_map first. */
  if (GNUNET_YES == check_peer_known(sub->peer_map,
                                     peer))
    {
      destroy_peer(get_peer_ctx(sub->peer_map,
                                peer));
    }
}


static void
clean_peer(struct Sub *sub,
           const struct GNUNET_PeerIdentity *peer)
{
  if (GNUNET_NO == check_sending_channel_needed(get_peer_ctx(sub->peer_map,
                                                             peer)))
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Going to remove send channel to peer %s\n",
          GNUNET_i2s(peer));
    #if ENABLE_MALICIOUS
      if (0 != GNUNET_memcmp(&attacked_peer,
                             peer))
        (void)destroy_sending_channel(get_peer_ctx(sub->peer_map,
                                                   peer));
    #else /* ENABLE_MALICIOUS */
      (void)destroy_sending_channel(get_peer_ctx(sub->peer_map,
                                                 peer));
    #endif /* ENABLE_MALICIOUS */
    }

  if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains(sub->peer_map,
                                                          peer))
    {
      /* Peer was already removed by callback on destroyed channel */
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Peer was removed from our knowledge during cleanup\n");
      return;
    }

  if ((GNUNET_NO == check_peer_send_intention(get_peer_ctx(sub->peer_map,
                                                           peer))) &&
      (GNUNET_NO == View_contains_peer(sub->view, peer)) &&
      (GNUNET_NO == CustomPeerMap_contains_peer(sub->push_map, peer)) &&
      (GNUNET_NO == CustomPeerMap_contains_peer(sub->push_map, peer)) &&
      (0 == RPS_sampler_count_id(sub->sampler, peer)) &&
      (GNUNET_YES == check_removable(get_peer_ctx(sub->peer_map, peer))))
    { /* We can safely remove this peer */
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Going to remove peer %s\n",
          GNUNET_i2s(peer));
      remove_peer(sub, peer);
      return;
    }
}


static void
cleanup_destroyed_channel(void *cls,
                          const struct GNUNET_CADET_Channel *channel)
{
  struct ChannelCtx *channel_ctx = cls;
  struct PeerContext *peer_ctx = channel_ctx->peer_ctx;

  (void)channel;

  channel_ctx->channel = NULL;
  remove_channel_ctx(channel_ctx);
  if (NULL != peer_ctx &&
      peer_ctx->send_channel_ctx == channel_ctx &&
      GNUNET_YES == check_sending_channel_needed(channel_ctx->peer_ctx))
    {
      remove_peer(peer_ctx->sub, &peer_ctx->peer_id);
    }
}

/***********************************************************************
* /Util functions
***********************************************************************/



/***********************************************************************
* Sub
***********************************************************************/

struct Sub *
new_sub(const struct GNUNET_HashCode *hash,
        uint32_t sampler_size,
        struct GNUNET_TIME_Relative round_interval)
{
  struct Sub *sub;

  sub = GNUNET_new(struct Sub);

  /* With the hash generated from the secret value this service only connects
   * to rps instances that share the value */
  struct GNUNET_MQ_MessageHandler cadet_handlers[] = {
    GNUNET_MQ_hd_fixed_size(peer_check,
                            GNUNET_MESSAGE_TYPE_RPS_PP_CHECK_LIVE,
                            struct GNUNET_MessageHeader,
                            NULL),
    GNUNET_MQ_hd_fixed_size(peer_push,
                            GNUNET_MESSAGE_TYPE_RPS_PP_PUSH,
                            struct GNUNET_MessageHeader,
                            NULL),
    GNUNET_MQ_hd_fixed_size(peer_pull_request,
                            GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
                            struct GNUNET_MessageHeader,
                            NULL),
    GNUNET_MQ_hd_var_size(peer_pull_reply,
                          GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY,
                          struct GNUNET_RPS_P2P_PullReplyMessage,
                          NULL),
    GNUNET_MQ_handler_end()
  };
  sub->hash = *hash;
  sub->cadet_port =
    GNUNET_CADET_open_port(cadet_handle,
                           &sub->hash,
                           &handle_inbound_channel,  /* Connect handler */
                           sub,  /* cls */
                           NULL,  /* WindowSize handler */
                           &cleanup_destroyed_channel,  /* Disconnect handler */
                           cadet_handlers);
  if (NULL == sub->cadet_port)
    {
      LOG(GNUNET_ERROR_TYPE_ERROR,
          "Cadet port `%s' is already in use.\n",
          GNUNET_APPLICATION_PORT_RPS);
      GNUNET_assert(0);
    }

  /* Set up general data structure to keep track about peers */
  sub->valid_peers = GNUNET_CONTAINER_multipeermap_create(4, GNUNET_NO);
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_filename(cfg,
                                              "rps",
                                              "FILENAME_VALID_PEERS",
                                              &sub->filename_valid_peers))
    {
      GNUNET_log_config_missing(GNUNET_ERROR_TYPE_ERROR,
                                "rps",
                                "FILENAME_VALID_PEERS");
    }
  if (0 != strncmp("DISABLE", sub->filename_valid_peers, 7))
    {
      char *tmp_filename_valid_peers;
      char str_hash[105];

      GNUNET_snprintf(str_hash,
                      sizeof(str_hash),
                      GNUNET_h2s_full(hash));
      tmp_filename_valid_peers = sub->filename_valid_peers;
      GNUNET_asprintf(&sub->filename_valid_peers,
                      "%s%s",
                      tmp_filename_valid_peers,
                      str_hash);
      GNUNET_free(tmp_filename_valid_peers);
    }
  sub->peer_map = GNUNET_CONTAINER_multipeermap_create(4, GNUNET_NO);

  /* Set up the sampler */
  sub->sampler_size_est_min = sampler_size;
  sub->sampler_size_est_need = sampler_size;;
  LOG(GNUNET_ERROR_TYPE_DEBUG, "MINSIZE is %u\n", sub->sampler_size_est_min);
  GNUNET_assert(0 != round_interval.rel_value_us);
  sub->round_interval = round_interval;
  sub->sampler = RPS_sampler_init(sampler_size,
                                  round_interval);

  /* Logging of internals */
#ifdef TO_FILE_FULL
  sub->file_name_view_log = store_prefix_file_name(&own_identity, "view");
#endif /* TO_FILE_FULL */
#ifdef TO_FILE
#ifdef TO_FILE_FULL
  sub->file_name_observed_log = store_prefix_file_name(&own_identity,
                                                       "observed");
#endif /* TO_FILE_FULL */
  sub->num_observed_peers = 0;
  sub->observed_unique_peers = GNUNET_CONTAINER_multipeermap_create(1,
                                                                    GNUNET_NO);
#endif /* TO_FILE */

  /* Set up data structures for gossip */
  sub->push_map = CustomPeerMap_create(4);
  sub->pull_map = CustomPeerMap_create(4);
  sub->view_size_est_min = sampler_size;;
  sub->view = View_create(sub->view_size_est_min);
  if (sub == msub)
    {
      GNUNET_STATISTICS_set(stats,
                            "view size aim",
                            sub->view_size_est_min,
                            GNUNET_NO);
    }

  /* Start executing rounds */
  sub->do_round_task = GNUNET_SCHEDULER_add_now(&do_round, sub);

  return sub;
}


#ifdef TO_FILE

static void
write_histogram_to_file(const uint32_t hist_array[],
                        const char *file_name)
{
  char collect_str[SIZE_DUMP_FILE + 1] = "";
  char *recv_str_iter;
  char *file_name_full;

  recv_str_iter = collect_str;
  file_name_full = store_prefix_file_name(&own_identity,
                                          file_name);
  for (uint32_t i = 0; i < HISTOGRAM_FILE_SLOTS; i++)
    {
      char collect_str_tmp[8];

      GNUNET_snprintf(collect_str_tmp,
                      sizeof(collect_str_tmp),
                      "%" PRIu32 "\n",
                      hist_array[i]);
      recv_str_iter = stpncpy(recv_str_iter,
                              collect_str_tmp,
                              6);
    }
  (void)stpcpy(recv_str_iter,
               "\n");
  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Writing push stats to disk\n");
  to_file_w_len(file_name_full,
                SIZE_DUMP_FILE,
                collect_str);
  GNUNET_free(file_name_full);
}
#endif /* TO_FILE */


static void
destroy_sub(struct Sub *sub)
{
  GNUNET_assert(NULL != sub);
  GNUNET_assert(NULL != sub->do_round_task);
  GNUNET_SCHEDULER_cancel(sub->do_round_task);
  sub->do_round_task = NULL;

  /* Disconnect from cadet */
  GNUNET_CADET_close_port(sub->cadet_port);
  sub->cadet_port = NULL;

  /* Clean up data structures for peers */
  RPS_sampler_destroy(sub->sampler);
  sub->sampler = NULL;
  View_destroy(sub->view);
  sub->view = NULL;
  CustomPeerMap_destroy(sub->push_map);
  sub->push_map = NULL;
  CustomPeerMap_destroy(sub->pull_map);
  sub->pull_map = NULL;
  peers_terminate(sub);

  /* Free leftover data structures */
#ifdef TO_FILE_FULL
  GNUNET_free(sub->file_name_view_log);
  sub->file_name_view_log = NULL;
#endif /* TO_FILE_FULL */
#ifdef TO_FILE
#ifdef TO_FILE_FULL
  GNUNET_free(sub->file_name_observed_log);
  sub->file_name_observed_log = NULL;
#endif /* TO_FILE_FULL */

  /* Write push frequencies to disk */
  write_histogram_to_file(sub->push_recv,
                          "push_recv");

  /* Write push deltas to disk */
  write_histogram_to_file(sub->push_delta,
                          "push_delta");

  /* Write pull delays to disk */
  write_histogram_to_file(sub->pull_delays,
                          "pull_delays");

  GNUNET_CONTAINER_multipeermap_destroy(sub->observed_unique_peers);
  sub->observed_unique_peers = NULL;
#endif /* TO_FILE */

  GNUNET_free(sub);
}


/***********************************************************************
* /Sub
***********************************************************************/


/***********************************************************************
* Core handlers
***********************************************************************/

void
core_init(void *cls,
          const struct GNUNET_PeerIdentity *my_identity)
{
  (void)cls;
  (void)my_identity;

  map_single_hop = GNUNET_CONTAINER_multipeermap_create(4, GNUNET_NO);
}


void *
core_connects(void *cls,
              const struct GNUNET_PeerIdentity *peer,
              struct GNUNET_MQ_Handle *mq)
{
  (void)cls;
  (void)mq;

  GNUNET_assert(GNUNET_YES ==
                GNUNET_CONTAINER_multipeermap_put(map_single_hop,
                                                  peer,
                                                  NULL,
                                                  GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
  return NULL;
}


void
core_disconnects(void *cls,
                 const struct GNUNET_PeerIdentity *peer,
                 void *peer_cls)
{
  (void)cls;
  (void)peer_cls;

  GNUNET_CONTAINER_multipeermap_remove_all(map_single_hop, peer);
}

/***********************************************************************
* /Core handlers
***********************************************************************/


static void
destroy_cli_ctx(struct ClientContext *cli_ctx)
{
  GNUNET_assert(NULL != cli_ctx);
  GNUNET_CONTAINER_DLL_remove(cli_ctx_head,
                              cli_ctx_tail,
                              cli_ctx);
  if (NULL != cli_ctx->sub)
    {
      destroy_sub(cli_ctx->sub);
      cli_ctx->sub = NULL;
    }
  GNUNET_free(cli_ctx);
}


static void
adapt_sizes(struct Sub *sub, double logestimate, double std_dev)
{
  double estimate;

  //double scale; // TODO this might go gloabal/config

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
      logestimate, std_dev, RPS_sampler_get_size(sub->sampler));
  //scale = .01;
  estimate = GNUNET_NSE_log_estimate_to_n(logestimate);
  // GNUNET_NSE_log_estimate_to_n (logestimate);
  estimate = pow(estimate, 1.0 / 3);
  // TODO add if std_dev is a number
  // estimate += (std_dev * scale);
  if (sub->view_size_est_min < ceil(estimate))
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
      sub->sampler_size_est_need = estimate;
      sub->view_size_est_need = estimate;
    }
  else
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
      //sub->sampler_size_est_need = sub->view_size_est_min;
      sub->view_size_est_need = sub->view_size_est_min;
    }
  if (sub == msub)
    {
      GNUNET_STATISTICS_set(stats,
                            "view size aim",
                            sub->view_size_est_need,
                            GNUNET_NO);
    }

  /* If the NSE has changed adapt the lists accordingly */
  resize_wrapper(sub->sampler, sub->sampler_size_est_need);
  View_change_len(sub->view, sub->view_size_est_need);
}


static void
nse_callback(void *cls,
             struct GNUNET_TIME_Absolute timestamp,
             double logestimate, double std_dev)
{
  (void)cls;
  (void)timestamp;
  struct ClientContext *cli_ctx_iter;

  adapt_sizes(msub, logestimate, std_dev);
  for (cli_ctx_iter = cli_ctx_head;
       NULL != cli_ctx_iter;
       cli_ctx_iter = cli_ctx_iter->next)
    {
      if (NULL != cli_ctx_iter->sub)
        {
          adapt_sizes(cli_ctx_iter->sub, logestimate, std_dev);
        }
    }
}


static int
check_client_seed(void *cls, const struct GNUNET_RPS_CS_SeedMessage *msg)
{
  struct ClientContext *cli_ctx = cls;
  uint16_t msize = ntohs(msg->header.size);
  uint32_t num_peers = ntohl(msg->num_peers);

  msize -= sizeof(struct GNUNET_RPS_CS_SeedMessage);
  if ((msize / sizeof(struct GNUNET_PeerIdentity) != num_peers) ||
      (msize % sizeof(struct GNUNET_PeerIdentity) != 0))
    {
      LOG(GNUNET_ERROR_TYPE_ERROR,
          "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
          ntohl(msg->num_peers),
          (msize / sizeof(struct GNUNET_PeerIdentity)));
      GNUNET_break(0);
      GNUNET_SERVICE_client_drop(cli_ctx->client);
      return GNUNET_SYSERR;
    }
  return GNUNET_OK;
}


static void
handle_client_seed(void *cls,
                   const struct GNUNET_RPS_CS_SeedMessage *msg)
{
  struct ClientContext *cli_ctx = cls;
  struct GNUNET_PeerIdentity *peers;
  uint32_t num_peers;
  uint32_t i;

  num_peers = ntohl(msg->num_peers);
  peers = (struct GNUNET_PeerIdentity *)&msg[1];

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Client seeded peers:\n");
  print_peer_list(peers, num_peers);

  for (i = 0; i < num_peers; i++)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Updating samplers with seed %" PRIu32 ": %s\n",
          i,
          GNUNET_i2s(&peers[i]));

      if (NULL != msub)
        got_peer(msub, &peers[i]);                /* Condition needed? */
      if (NULL != cli_ctx->sub)
        got_peer(cli_ctx->sub, &peers[i]);
    }
  GNUNET_SERVICE_client_continue(cli_ctx->client);
}


static void
handle_client_view_request(void *cls,
                           const struct GNUNET_RPS_CS_DEBUG_ViewRequest *msg)
{
  struct ClientContext *cli_ctx = cls;
  uint64_t num_updates;

  num_updates = ntohl(msg->num_updates);

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Client requested %" PRIu64 " updates of view.\n",
      num_updates);

  GNUNET_assert(NULL != cli_ctx);
  cli_ctx->view_updates_left = num_updates;
  send_view(cli_ctx, NULL, 0);
  GNUNET_SERVICE_client_continue(cli_ctx->client);
}


static void
handle_client_view_cancel(void *cls,
                          const struct GNUNET_MessageHeader *msg)
{
  struct ClientContext *cli_ctx = cls;

  (void)msg;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Client does not want to receive updates of view any more.\n");

  GNUNET_assert(NULL != cli_ctx);
  cli_ctx->view_updates_left = 0;
  GNUNET_SERVICE_client_continue(cli_ctx->client);
  if (GNUNET_YES == cli_ctx->stream_update)
    {
      destroy_cli_ctx(cli_ctx);
    }
}


static void
handle_client_stream_request(void *cls,
                             const struct GNUNET_RPS_CS_DEBUG_StreamRequest *msg)
{
  struct ClientContext *cli_ctx = cls;

  (void)msg;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Client requested peers from biased stream.\n");
  cli_ctx->stream_update = GNUNET_YES;

  GNUNET_assert(NULL != cli_ctx);
  GNUNET_SERVICE_client_continue(cli_ctx->client);
}


static void
handle_client_stream_cancel(void *cls,
                            const struct GNUNET_MessageHeader *msg)
{
  struct ClientContext *cli_ctx = cls;

  (void)msg;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Client canceled receiving peers from biased stream.\n");
  cli_ctx->stream_update = GNUNET_NO;

  GNUNET_assert(NULL != cli_ctx);
  GNUNET_SERVICE_client_continue(cli_ctx->client);
}


static void
handle_client_start_sub(void *cls,
                        const struct GNUNET_RPS_CS_SubStartMessage *msg)
{
  struct ClientContext *cli_ctx = cls;

  LOG(GNUNET_ERROR_TYPE_DEBUG, "Client requested start of a new sub.\n");
  if (NULL != cli_ctx->sub &&
      0 != memcmp(&cli_ctx->sub->hash,
                  &msg->hash,
                  sizeof(struct GNUNET_HashCode)))
    {
      LOG(GNUNET_ERROR_TYPE_WARNING, "Already have a Sub with different share for this client. Remove old one, add new.\n");
      destroy_sub(cli_ctx->sub);
      cli_ctx->sub = NULL;
    }
  cli_ctx->sub = new_sub(&msg->hash,
                         msub->sampler_size_est_min, // TODO make api input?
                         GNUNET_TIME_relative_ntoh(msg->round_interval));
  GNUNET_SERVICE_client_continue(cli_ctx->client);
}


static void
handle_client_stop_sub(void *cls,
                       const struct GNUNET_RPS_CS_SubStopMessage *msg)
{
  struct ClientContext *cli_ctx = cls;

  GNUNET_assert(NULL != cli_ctx->sub);
  if (0 != memcmp(&cli_ctx->sub->hash, &msg->hash, sizeof(struct GNUNET_HashCode)))
    {
      LOG(GNUNET_ERROR_TYPE_WARNING, "Share of current sub and request differ!\n");
    }
  destroy_sub(cli_ctx->sub);
  cli_ctx->sub = NULL;
  GNUNET_SERVICE_client_continue(cli_ctx->client);
}


static void
handle_peer_check(void *cls,
                  const struct GNUNET_MessageHeader *msg)
{
  const struct ChannelCtx *channel_ctx = cls;
  const struct GNUNET_PeerIdentity *peer = &channel_ctx->peer_ctx->peer_id;

  (void)msg;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Received CHECK_LIVE (%s)\n", GNUNET_i2s(peer));
  if (channel_ctx->peer_ctx->sub == msub)
    {
      GNUNET_STATISTICS_update(stats,
                               "# pending online checks",
                               -1,
                               GNUNET_NO);
    }

  GNUNET_CADET_receive_done(channel_ctx->channel);
}


static void
handle_peer_push(void *cls,
                 const struct GNUNET_MessageHeader *msg)
{
  const struct ChannelCtx *channel_ctx = cls;
  const struct GNUNET_PeerIdentity *peer = &channel_ctx->peer_ctx->peer_id;

  (void)msg;

  // (check the proof of work (?))

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Received PUSH (%s)\n",
      GNUNET_i2s(peer));
  if (channel_ctx->peer_ctx->sub == msub)
    {
      GNUNET_STATISTICS_update(stats, "# push message received", 1, GNUNET_NO);
      if (NULL != map_single_hop &&
          GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains(map_single_hop,
                                                              peer))
        {
          GNUNET_STATISTICS_update(stats,
                                   "# push message received (multi-hop peer)",
                                   1,
                                   GNUNET_NO);
        }
    }

  #if ENABLE_MALICIOUS
  struct AttackedPeer *tmp_att_peer;

  if ((1 == mal_type) ||
      (3 == mal_type))
    { /* Try to maximise representation */
      tmp_att_peer = GNUNET_new(struct AttackedPeer);
      tmp_att_peer->peer_id = *peer;
      if (NULL == att_peer_set)
        att_peer_set = GNUNET_CONTAINER_multipeermap_create(1, GNUNET_NO);
      if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains(att_peer_set,
                                                              peer))
        {
          GNUNET_CONTAINER_DLL_insert(att_peers_head,
                                      att_peers_tail,
                                      tmp_att_peer);
          add_peer_array_to_set(peer, 1, att_peer_set);
        }
      else
        {
          GNUNET_free(tmp_att_peer);
        }
    }


  else if (2 == mal_type)
    {
      /* We attack one single well-known peer - simply ignore */
    }
  #endif /* ENABLE_MALICIOUS */

  /* Add the sending peer to the push_map */
  CustomPeerMap_put(channel_ctx->peer_ctx->sub->push_map, peer);

  GNUNET_break_op(check_peer_known(channel_ctx->peer_ctx->sub->peer_map,
                                   &channel_ctx->peer_ctx->peer_id));
  GNUNET_CADET_receive_done(channel_ctx->channel);
}


static void
handle_peer_pull_request(void *cls,
                         const struct GNUNET_MessageHeader *msg)
{
  const struct ChannelCtx *channel_ctx = cls;
  struct PeerContext *peer_ctx = channel_ctx->peer_ctx;
  const struct GNUNET_PeerIdentity *peer = &peer_ctx->peer_id;
  const struct GNUNET_PeerIdentity *view_array;

  (void)msg;

  LOG(GNUNET_ERROR_TYPE_DEBUG, "Received PULL REQUEST (%s)\n", GNUNET_i2s(peer));
  if (peer_ctx->sub == msub)
    {
      GNUNET_STATISTICS_update(stats,
                               "# pull request message received",
                               1,
                               GNUNET_NO);
      if (NULL != map_single_hop &&
          GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains(map_single_hop,
                                                              &peer_ctx->peer_id))
        {
          GNUNET_STATISTICS_update(stats,
                                   "# pull request message received (multi-hop peer)",
                                   1,
                                   GNUNET_NO);
        }
    }

  #if ENABLE_MALICIOUS
  if (1 == mal_type
      || 3 == mal_type)
    { /* Try to maximise representation */
      send_pull_reply(peer_ctx, mal_peers, num_mal_peers);
    }

  else if (2 == mal_type)
    { /* Try to partition network */
      if (0 == GNUNET_memcmp(&attacked_peer, peer))
        {
          send_pull_reply(peer_ctx, mal_peers, num_mal_peers);
        }
    }
  #endif /* ENABLE_MALICIOUS */

  GNUNET_break_op(check_peer_known(channel_ctx->peer_ctx->sub->peer_map,
                                   &channel_ctx->peer_ctx->peer_id));
  GNUNET_CADET_receive_done(channel_ctx->channel);
  view_array = View_get_as_array(channel_ctx->peer_ctx->sub->view);
  send_pull_reply(peer_ctx,
                  view_array,
                  View_size(channel_ctx->peer_ctx->sub->view));
}


static int
check_peer_pull_reply(void *cls,
                      const struct GNUNET_RPS_P2P_PullReplyMessage *msg)
{
  struct ChannelCtx *channel_ctx = cls;
  struct PeerContext *sender_ctx = channel_ctx->peer_ctx;

  if (sizeof(struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs(msg->header.size))
    {
      GNUNET_break_op(0);
      return GNUNET_SYSERR;
    }

  if ((ntohs(msg->header.size) - sizeof(struct GNUNET_RPS_P2P_PullReplyMessage)) /
      sizeof(struct GNUNET_PeerIdentity) != ntohl(msg->num_peers))
    {
      LOG(GNUNET_ERROR_TYPE_ERROR,
          "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
          ntohl(msg->num_peers),
          (ntohs(msg->header.size) - sizeof(struct GNUNET_RPS_P2P_PullReplyMessage)) /
          sizeof(struct GNUNET_PeerIdentity));
      GNUNET_break_op(0);
      return GNUNET_SYSERR;
    }

  if (GNUNET_YES != check_peer_flag(sender_ctx->sub->peer_map,
                                    &sender_ctx->peer_id,
                                    Peers_PULL_REPLY_PENDING))
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Received a pull reply from a peer (%s) we didn't request one from!\n",
          GNUNET_i2s(&sender_ctx->peer_id));
      if (sender_ctx->sub == msub)
        {
          GNUNET_STATISTICS_update(stats,
                                   "# unrequested pull replies",
                                   1,
                                   GNUNET_NO);
        }
    }
  return GNUNET_OK;
}


static void
handle_peer_pull_reply(void *cls,
                       const struct GNUNET_RPS_P2P_PullReplyMessage *msg)
{
  const struct ChannelCtx *channel_ctx = cls;
  const struct GNUNET_PeerIdentity *sender = &channel_ctx->peer_ctx->peer_id;
  const struct GNUNET_PeerIdentity *peers;
  struct Sub *sub = channel_ctx->peer_ctx->sub;
  uint32_t i;

#if ENABLE_MALICIOUS
  struct AttackedPeer *tmp_att_peer;
#endif /* ENABLE_MALICIOUS */

  sub->pull_delays[sub->num_rounds - channel_ctx->peer_ctx->round_pull_req]++;
  LOG(GNUNET_ERROR_TYPE_DEBUG, "Received PULL REPLY (%s)\n", GNUNET_i2s(sender));
  if (channel_ctx->peer_ctx->sub == msub)
    {
      GNUNET_STATISTICS_update(stats,
                               "# pull reply messages received",
                               1,
                               GNUNET_NO);
      if (NULL != map_single_hop &&
          GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains(map_single_hop,
                                                              &channel_ctx->peer_ctx->peer_id))
        {
          GNUNET_STATISTICS_update(stats,
                                   "# pull reply messages received (multi-hop peer)",
                                   1,
                                   GNUNET_NO);
        }
    }

  #if ENABLE_MALICIOUS
  // We shouldn't even receive pull replies as we're not sending
  if (2 == mal_type)
    {
    }
  #endif /* ENABLE_MALICIOUS */

  /* Do actual logic */
  peers = (const struct GNUNET_PeerIdentity *)&msg[1];

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "PULL REPLY received, got following %u peers:\n",
      ntohl(msg->num_peers));

  for (i = 0; i < ntohl(msg->num_peers); i++)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "%u. %s\n",
          i,
          GNUNET_i2s(&peers[i]));

    #if ENABLE_MALICIOUS
      if ((NULL != att_peer_set) &&
          (1 == mal_type || 3 == mal_type))
        { /* Add attacked peer to local list */
          // TODO check if we sent a request and this was the first reply
          if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains(att_peer_set,
                                                                  &peers[i])
              && GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains(mal_peer_set,
                                                                     &peers[i]))
            {
              tmp_att_peer = GNUNET_new(struct AttackedPeer);
              tmp_att_peer->peer_id = peers[i];
              GNUNET_CONTAINER_DLL_insert(att_peers_head,
                                          att_peers_tail,
                                          tmp_att_peer);
              add_peer_array_to_set(&peers[i], 1, att_peer_set);
            }
          continue;
        }
    #endif /* ENABLE_MALICIOUS */
      /* Make sure we 'know' about this peer */
      (void)insert_peer(channel_ctx->peer_ctx->sub,
                        &peers[i]);

      if (GNUNET_YES == check_peer_valid(channel_ctx->peer_ctx->sub->valid_peers,
                                         &peers[i]))
        {
          CustomPeerMap_put(channel_ctx->peer_ctx->sub->pull_map,
                            &peers[i]);
        }
      else
        {
          schedule_operation(channel_ctx->peer_ctx,
                             insert_in_pull_map,
                             channel_ctx->peer_ctx->sub); /* cls */
          (void)issue_peer_online_check(channel_ctx->peer_ctx->sub,
                                        &peers[i]);
        }
    }

  UNSET_PEER_FLAG(get_peer_ctx(channel_ctx->peer_ctx->sub->peer_map,
                               sender),
                  Peers_PULL_REPLY_PENDING);
  clean_peer(channel_ctx->peer_ctx->sub,
             sender);

  GNUNET_break_op(check_peer_known(channel_ctx->peer_ctx->sub->peer_map,
                                   sender));
  GNUNET_CADET_receive_done(channel_ctx->channel);
}


static struct GNUNET_TIME_Relative
compute_rand_delay(struct GNUNET_TIME_Relative mean,
                   unsigned int spread)
{
  struct GNUNET_TIME_Relative half_interval;
  struct GNUNET_TIME_Relative ret;
  unsigned int rand_delay;
  unsigned int max_rand_delay;

  if (0 == spread)
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Not accepting spread of 0\n");
      GNUNET_break(0);
      GNUNET_assert(0);
    }
  GNUNET_assert(0 != mean.rel_value_us);

  /* Compute random time value between spread * mean and spread * mean */
  half_interval = GNUNET_TIME_relative_divide(mean, spread);

  max_rand_delay = GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us / mean.rel_value_us * (2 / spread);
  rand_delay = GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, max_rand_delay);
  ret = GNUNET_TIME_relative_saturating_multiply(mean, rand_delay);
  ret = GNUNET_TIME_relative_divide(ret, max_rand_delay);
  ret = GNUNET_TIME_relative_add(ret, half_interval);

  if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == ret.rel_value_us)
    LOG(GNUNET_ERROR_TYPE_WARNING,
        "Returning FOREVER_REL\n");

  return ret;
}


static void
send_pull_request(struct PeerContext *peer_ctx)
{
  struct GNUNET_MQ_Envelope *ev;

  GNUNET_assert(GNUNET_NO == check_peer_flag(peer_ctx->sub->peer_map,
                                             &peer_ctx->peer_id,
                                             Peers_PULL_REPLY_PENDING));
  SET_PEER_FLAG(peer_ctx,
                Peers_PULL_REPLY_PENDING);
  peer_ctx->round_pull_req = peer_ctx->sub->num_rounds;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Going to send PULL REQUEST to peer %s.\n",
      GNUNET_i2s(&peer_ctx->peer_id));

  ev = GNUNET_MQ_msg_header(GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
  send_message(peer_ctx,
               ev,
               "PULL REQUEST");
  if (peer_ctx->sub)
    {
      GNUNET_STATISTICS_update(stats,
                               "# pull request send issued",
                               1,
                               GNUNET_NO);
      if (NULL != map_single_hop &&
          GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains(map_single_hop,
                                                              &peer_ctx->peer_id))
        {
          GNUNET_STATISTICS_update(stats,
                                   "# pull request send issued (multi-hop peer)",
                                   1,
                                   GNUNET_NO);
        }
    }
}


static void
send_push(struct PeerContext *peer_ctx)
{
  struct GNUNET_MQ_Envelope *ev;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Going to send PUSH to peer %s.\n",
      GNUNET_i2s(&peer_ctx->peer_id));

  ev = GNUNET_MQ_msg_header(GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
  send_message(peer_ctx, ev, "PUSH");
  if (peer_ctx->sub)
    {
      GNUNET_STATISTICS_update(stats,
                               "# push send issued",
                               1,
                               GNUNET_NO);
      if (NULL != map_single_hop &&
          GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains(map_single_hop,
                                                              &peer_ctx->peer_id))
        {
          GNUNET_STATISTICS_update(stats,
                                   "# push send issued (multi-hop peer)",
                                   1,
                                   GNUNET_NO);
        }
    }
}


#if ENABLE_MALICIOUS


static int
check_client_act_malicious(void *cls,
                           const struct GNUNET_RPS_CS_ActMaliciousMessage *msg)
{
  struct ClientContext *cli_ctx = cls;
  uint16_t msize = ntohs(msg->header.size);
  uint32_t num_peers = ntohl(msg->num_peers);

  msize -= sizeof(struct GNUNET_RPS_CS_ActMaliciousMessage);
  if ((msize / sizeof(struct GNUNET_PeerIdentity) != num_peers) ||
      (msize % sizeof(struct GNUNET_PeerIdentity) != 0))
    {
      LOG(GNUNET_ERROR_TYPE_ERROR,
          "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
          ntohl(msg->num_peers),
          (msize / sizeof(struct GNUNET_PeerIdentity)));
      GNUNET_break(0);
      GNUNET_SERVICE_client_drop(cli_ctx->client);
      return GNUNET_SYSERR;
    }
  return GNUNET_OK;
}

static void
handle_client_act_malicious(void *cls,
                            const struct GNUNET_RPS_CS_ActMaliciousMessage *msg)
{
  struct ClientContext *cli_ctx = cls;
  struct GNUNET_PeerIdentity *peers;
  uint32_t num_mal_peers_sent;
  uint32_t num_mal_peers_old;
  struct Sub *sub = cli_ctx->sub;

  if (NULL == sub)
    sub = msub;
  /* Do actual logic */
  peers = (struct GNUNET_PeerIdentity *)&msg[1];
  mal_type = ntohl(msg->type);
  if (NULL == mal_peer_set)
    mal_peer_set = GNUNET_CONTAINER_multipeermap_create(1, GNUNET_NO);

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Now acting malicious type %" PRIu32 ", got %" PRIu32 " peers.\n",
      mal_type,
      ntohl(msg->num_peers));

  if (1 == mal_type)
    { /* Try to maximise representation */
      /* Add other malicious peers to those we already know */

      num_mal_peers_sent = ntohl(msg->num_peers);
      num_mal_peers_old = num_mal_peers;
      GNUNET_array_grow(mal_peers,
                        num_mal_peers,
                        num_mal_peers + num_mal_peers_sent);
      GNUNET_memcpy(&mal_peers[num_mal_peers_old],
                    peers,
                    num_mal_peers_sent * sizeof(struct GNUNET_PeerIdentity));

      /* Add all mal peers to mal_peer_set */
      add_peer_array_to_set(&mal_peers[num_mal_peers_old],
                            num_mal_peers_sent,
                            mal_peer_set);

      /* Substitute do_round () with do_mal_round () */
      GNUNET_assert(NULL != sub->do_round_task);
      GNUNET_SCHEDULER_cancel(sub->do_round_task);
      sub->do_round_task = GNUNET_SCHEDULER_add_now(&do_mal_round, sub);
    }

  else if ((2 == mal_type) ||
           (3 == mal_type))
    { /* Try to partition the network */
      /* Add other malicious peers to those we already know */

      num_mal_peers_sent = ntohl(msg->num_peers) - 1;
      num_mal_peers_old = num_mal_peers;
      GNUNET_assert(GNUNET_MAX_MALLOC_CHECKED > num_mal_peers_sent);
      GNUNET_array_grow(mal_peers,
                        num_mal_peers,
                        num_mal_peers + num_mal_peers_sent);
      if (NULL != mal_peers &&
          0 != num_mal_peers)
        {
          GNUNET_memcpy(&mal_peers[num_mal_peers_old],
                        peers,
                        num_mal_peers_sent * sizeof(struct GNUNET_PeerIdentity));

          /* Add all mal peers to mal_peer_set */
          add_peer_array_to_set(&mal_peers[num_mal_peers_old],
                                num_mal_peers_sent,
                                mal_peer_set);
        }

      /* Store the one attacked peer */
      GNUNET_memcpy(&attacked_peer,
                    &msg->attacked_peer,
                    sizeof(struct GNUNET_PeerIdentity));
      /* Set the flag of the attacked peer to valid to avoid problems */
      if (GNUNET_NO == check_peer_known(sub->peer_map, &attacked_peer))
        {
          (void)issue_peer_online_check(sub, &attacked_peer);
        }

      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Attacked peer is %s\n",
          GNUNET_i2s(&attacked_peer));

      /* Substitute do_round () with do_mal_round () */
      if (NULL != sub->do_round_task)
        {
          /* Probably in shutdown */
          GNUNET_SCHEDULER_cancel(sub->do_round_task);
          sub->do_round_task = GNUNET_SCHEDULER_add_now(&do_mal_round, sub);
        }
    }
  else if (0 == mal_type)
    { /* Stop acting malicious */
      GNUNET_array_grow(mal_peers, num_mal_peers, 0);

      /* Substitute do_mal_round () with do_round () */
      GNUNET_SCHEDULER_cancel(sub->do_round_task);
      sub->do_round_task = GNUNET_SCHEDULER_add_now(&do_round, sub);
    }
  else
    {
      GNUNET_break(0);
      GNUNET_SERVICE_client_continue(cli_ctx->client);
    }
  GNUNET_SERVICE_client_continue(cli_ctx->client);
}


static void
do_mal_round(void *cls)
{
  uint32_t num_pushes;
  uint32_t i;
  struct GNUNET_TIME_Relative time_next_round;
  struct AttackedPeer *tmp_att_peer;
  struct Sub *sub = cls;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Going to execute next round maliciously type %" PRIu32 ".\n",
      mal_type);
  sub->do_round_task = NULL;
  GNUNET_assert(mal_type <= 3);
  /* Do malicious actions */
  if (1 == mal_type)
    { /* Try to maximise representation */
      /* The maximum of pushes we're going to send this round */
      num_pushes = GNUNET_MIN(GNUNET_MIN(push_limit,
                                         num_attacked_peers),
                              GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);

      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Going to send %" PRIu32 " pushes\n",
          num_pushes);

      /* Send PUSHes to attacked peers */
      for (i = 0; i < num_pushes; i++)
        {
          if (att_peers_tail == att_peer_index)
            att_peer_index = att_peers_head;
          else
            att_peer_index = att_peer_index->next;

          send_push(get_peer_ctx(sub->peer_map, &att_peer_index->peer_id));
        }

      /* Send PULLs to some peers to learn about additional peers to attack */
      tmp_att_peer = att_peer_index;
      for (i = 0; i < num_pushes * alpha; i++)
        {
          if (att_peers_tail == tmp_att_peer)
            tmp_att_peer = att_peers_head;
          else
            att_peer_index = tmp_att_peer->next;

          send_pull_request(get_peer_ctx(sub->peer_map, &tmp_att_peer->peer_id));
        }
    }


  else if (2 == mal_type)
    { 
      (void)issue_peer_online_check(sub, &attacked_peer);
      if (GNUNET_YES == check_peer_flag(sub->peer_map,
                                        &attacked_peer,
                                        Peers_ONLINE))
        send_push(get_peer_ctx(sub->peer_map, &attacked_peer));
    }


  if (3 == mal_type)
    { /* Combined attack */
      /* Send PUSH to attacked peers */
      if (GNUNET_YES == check_peer_known(sub->peer_map, &attacked_peer))
        {
          (void)issue_peer_online_check(sub, &attacked_peer);
          if (GNUNET_YES == check_peer_flag(sub->peer_map,
                                            &attacked_peer,
                                            Peers_ONLINE))
            {
              LOG(GNUNET_ERROR_TYPE_DEBUG,
                  "Goding to send push to attacked peer (%s)\n",
                  GNUNET_i2s(&attacked_peer));
              send_push(get_peer_ctx(sub->peer_map, &attacked_peer));
            }
        }
      (void)issue_peer_online_check(sub, &attacked_peer);

      /* The maximum of pushes we're going to send this round */
      num_pushes = GNUNET_MIN(GNUNET_MIN(push_limit - 1,
                                         num_attacked_peers),
                              GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);

      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Going to send %" PRIu32 " pushes\n",
          num_pushes);

      for (i = 0; i < num_pushes; i++)
        {
          if (att_peers_tail == att_peer_index)
            att_peer_index = att_peers_head;
          else
            att_peer_index = att_peer_index->next;

          send_push(get_peer_ctx(sub->peer_map, &att_peer_index->peer_id));
        }

      /* Send PULLs to some peers to learn about additional peers to attack */
      tmp_att_peer = att_peer_index;
      for (i = 0; i < num_pushes * alpha; i++)
        {
          if (att_peers_tail == tmp_att_peer)
            tmp_att_peer = att_peers_head;
          else
            att_peer_index = tmp_att_peer->next;

          send_pull_request(get_peer_ctx(sub->peer_map, &tmp_att_peer->peer_id));
        }
    }

  /* Schedule next round */
  time_next_round = compute_rand_delay(sub->round_interval, 2);

  GNUNET_assert(NULL == sub->do_round_task);
  sub->do_round_task = GNUNET_SCHEDULER_add_delayed(time_next_round,
                                                    &do_mal_round, sub);
  LOG(GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
}
#endif /* ENABLE_MALICIOUS */


static void
do_round(void *cls)
{
  unsigned int i;
  const struct GNUNET_PeerIdentity *view_array;
  unsigned int *permut;
  unsigned int a_peers; /* Number of peers we send pushes to */
  unsigned int b_peers; /* Number of peers we send pull requests to */
  uint32_t first_border;
  uint32_t second_border;
  struct GNUNET_PeerIdentity peer;
  struct GNUNET_PeerIdentity *update_peer;
  struct Sub *sub = cls;

  sub->num_rounds++;
  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Going to execute next round.\n");
  if (sub == msub)
    {
      GNUNET_STATISTICS_update(stats, "# rounds", 1, GNUNET_NO);
    }
  sub->do_round_task = NULL;
#ifdef TO_FILE_FULL
  to_file(sub->file_name_view_log,
          "___ new round ___");
#endif /* TO_FILE_FULL */
  view_array = View_get_as_array(sub->view);
  for (i = 0; i < View_size(sub->view); i++)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "\t%s\n", GNUNET_i2s(&view_array[i]));
#ifdef TO_FILE_FULL
      to_file(sub->file_name_view_log,
              "=%s\t(do round)",
              GNUNET_i2s_full(&view_array[i]));
#endif /* TO_FILE_FULL */
    }


  /* Send pushes and pull requests */
  if (0 < View_size(sub->view))
    {
      permut = GNUNET_CRYPTO_random_permute(GNUNET_CRYPTO_QUALITY_STRONG,
                                            View_size(sub->view));

      /* Send PUSHes */
      a_peers = ceil(alpha * View_size(sub->view));

      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Going to send pushes to %u (ceil (%f * %u)) peers.\n",
          a_peers, alpha, View_size(sub->view));
      for (i = 0; i < a_peers; i++)
        {
          peer = view_array[permut[i]];
          // FIXME if this fails schedule/loop this for later
          send_push(get_peer_ctx(sub->peer_map, &peer));
        }

      /* Send PULL requests */
      b_peers = ceil(beta * View_size(sub->view));
      first_border = a_peers;
      second_border = a_peers + b_peers;
      if (second_border > View_size(sub->view))
        {
          first_border = View_size(sub->view) - b_peers;
          second_border = View_size(sub->view);
        }
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Going to send pulls to %u (ceil (%f * %u)) peers.\n",
          b_peers, beta, View_size(sub->view));
      for (i = first_border; i < second_border; i++)
        {
          peer = view_array[permut[i]];
          if (GNUNET_NO == check_peer_flag(sub->peer_map,
                                           &peer,
                                           Peers_PULL_REPLY_PENDING))
            { // FIXME if this fails schedule/loop this for later
              send_pull_request(get_peer_ctx(sub->peer_map, &peer));
            }
        }

      GNUNET_free(permut);
      permut = NULL;
    }


  /* Update view */
  /* TODO see how many peers are in push-/pull- list! */

  if ((CustomPeerMap_size(sub->push_map) <= alpha * sub->view_size_est_need) &&
      (0 < CustomPeerMap_size(sub->push_map)) &&
      (0 < CustomPeerMap_size(sub->pull_map)))
    { /* If conditions for update are fulfilled, update */
      LOG(GNUNET_ERROR_TYPE_DEBUG, "Update of the view.\n");

      uint32_t final_size;
      uint32_t peers_to_clean_size;
      struct GNUNET_PeerIdentity *peers_to_clean;

      peers_to_clean = NULL;
      peers_to_clean_size = 0;
      GNUNET_array_grow(peers_to_clean,
                        peers_to_clean_size,
                        View_size(sub->view));
      GNUNET_memcpy(peers_to_clean,
                    view_array,
                    View_size(sub->view) * sizeof(struct GNUNET_PeerIdentity));

      /* Seems like recreating is the easiest way of emptying the peermap */
      View_clear(sub->view);
#ifdef TO_FILE_FULL
      to_file(sub->file_name_view_log,
              "--- emptied ---");
#endif /* TO_FILE_FULL */

      first_border = GNUNET_MIN(ceil(alpha * sub->view_size_est_need),
                                CustomPeerMap_size(sub->push_map));
      second_border = first_border +
                      GNUNET_MIN(floor(beta * sub->view_size_est_need),
                                 CustomPeerMap_size(sub->pull_map));
      final_size = second_border +
                   ceil((1 - (alpha + beta)) * sub->view_size_est_need);
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "first border: %" PRIu32 ", second border: %" PRIu32 ", final size: %" PRIu32 "\n",
          first_border,
          second_border,
          final_size);

      /* Update view with peers received through PUSHes */
      permut = GNUNET_CRYPTO_random_permute(GNUNET_CRYPTO_QUALITY_STRONG,
                                            CustomPeerMap_size(sub->push_map));
      for (i = 0; i < first_border; i++)
        {
          int inserted;
          inserted = insert_in_view(sub,
                                    CustomPeerMap_get_peer_by_index(sub->push_map,
                                                                    permut[i]));
          if (GNUNET_OK == inserted)
            {
              clients_notify_stream_peer(sub,
                                         1,
                                         CustomPeerMap_get_peer_by_index(sub->push_map, permut[i]));
            }
#ifdef TO_FILE_FULL
          to_file(sub->file_name_view_log,
                  "+%s\t(push list)",
                  GNUNET_i2s_full(&view_array[i]));
#endif /* TO_FILE_FULL */
       // TODO change the peer_flags accordingly
        }
      GNUNET_free(permut);
      permut = NULL;

      /* Update view with peers received through PULLs */
      permut = GNUNET_CRYPTO_random_permute(GNUNET_CRYPTO_QUALITY_STRONG,
                                            CustomPeerMap_size(sub->pull_map));
      for (i = first_border; i < second_border; i++)
        {
          int inserted;
          inserted = insert_in_view(sub,
                                    CustomPeerMap_get_peer_by_index(sub->pull_map,
                                                                    permut[i - first_border]));
          if (GNUNET_OK == inserted)
            {
              clients_notify_stream_peer(sub,
                                         1,
                                         CustomPeerMap_get_peer_by_index(sub->pull_map,
                                                                         permut[i - first_border]));
            }
#ifdef TO_FILE_FULL
          to_file(sub->file_name_view_log,
                  "+%s\t(pull list)",
                  GNUNET_i2s_full(&view_array[i]));
#endif /* TO_FILE_FULL */
       // TODO change the peer_flags accordingly
        }
      GNUNET_free(permut);
      permut = NULL;

      /* Update view with peers from history */
      RPS_sampler_get_n_rand_peers(sub->sampler,
                                   final_size - second_border,
                                   hist_update,
                                   sub);
      // TODO change the peer_flags accordingly

      for (i = 0; i < View_size(sub->view); i++)
        rem_from_list(&peers_to_clean, &peers_to_clean_size, &view_array[i]);

      /* Clean peers that were removed from the view */
      for (i = 0; i < peers_to_clean_size; i++)
        {
#ifdef TO_FILE_FULL
          to_file(sub->file_name_view_log,
                  "-%s",
                  GNUNET_i2s_full(&peers_to_clean[i]));
#endif /* TO_FILE_FULL */
          clean_peer(sub, &peers_to_clean[i]);
        }

      GNUNET_array_grow(peers_to_clean, peers_to_clean_size, 0);
      clients_notify_view_update(sub);
    }
  else
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG, "No update of the view.\n");
      if (sub == msub)
        {
          GNUNET_STATISTICS_update(stats, "# rounds blocked", 1, GNUNET_NO);
          if (CustomPeerMap_size(sub->push_map) > alpha * sub->view_size_est_need &&
              !(0 >= CustomPeerMap_size(sub->pull_map)))
            GNUNET_STATISTICS_update(stats, "# rounds blocked - too many pushes", 1, GNUNET_NO);
          if (CustomPeerMap_size(sub->push_map) > alpha * sub->view_size_est_need &&
              (0 >= CustomPeerMap_size(sub->pull_map)))
            GNUNET_STATISTICS_update(stats, "# rounds blocked - too many pushes, no pull replies", 1, GNUNET_NO);
          if (0 >= CustomPeerMap_size(sub->push_map) &&
              !(0 >= CustomPeerMap_size(sub->pull_map)))
            GNUNET_STATISTICS_update(stats, "# rounds blocked - no pushes", 1, GNUNET_NO);
          if (0 >= CustomPeerMap_size(sub->push_map) &&
              (0 >= CustomPeerMap_size(sub->pull_map)))
            GNUNET_STATISTICS_update(stats, "# rounds blocked - no pushes, no pull replies", 1, GNUNET_NO);
          if (0 >= CustomPeerMap_size(sub->pull_map) &&
              CustomPeerMap_size(sub->push_map) > alpha * sub->view_size_est_need &&
              0 >= CustomPeerMap_size(sub->push_map))
            GNUNET_STATISTICS_update(stats, "# rounds blocked - no pull replies", 1, GNUNET_NO);
        }
    }
  // TODO independent of that also get some peers from CADET_get_peers()?
  if (CustomPeerMap_size(sub->push_map) < HISTOGRAM_FILE_SLOTS)
    {
      sub->push_recv[CustomPeerMap_size(sub->push_map)]++;
    }
  else
    {
      LOG(GNUNET_ERROR_TYPE_WARNING,
          "Push map size too big for histogram (%u, %u)\n",
          CustomPeerMap_size(sub->push_map),
          HISTOGRAM_FILE_SLOTS);
    }
  // FIXME check bounds of histogram
  sub->push_delta[(int32_t)(CustomPeerMap_size(sub->push_map) -
                            (alpha * sub->view_size_est_need)) +
                  (HISTOGRAM_FILE_SLOTS / 2)]++;
  if (sub == msub)
    {
      GNUNET_STATISTICS_set(stats,
                            "# peers in push map at end of round",
                            CustomPeerMap_size(sub->push_map),
                            GNUNET_NO);
      GNUNET_STATISTICS_set(stats,
                            "# peers in pull map at end of round",
                            CustomPeerMap_size(sub->pull_map),
                            GNUNET_NO);
      GNUNET_STATISTICS_set(stats,
                            "# peers in view at end of round",
                            View_size(sub->view),
                            GNUNET_NO);
      GNUNET_STATISTICS_set(stats,
                            "# expected pushes",
                            alpha * sub->view_size_est_need,
                            GNUNET_NO);
      GNUNET_STATISTICS_set(stats,
                            "delta expected - received pushes",
                            CustomPeerMap_size(sub->push_map) - (alpha * sub->view_size_est_need),
                            GNUNET_NO);
    }

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Received %u pushes and %u pulls last round (alpha (%.2f) * view_size (sub->view%u) = %.2f)\n",
      CustomPeerMap_size(sub->push_map),
      CustomPeerMap_size(sub->pull_map),
      alpha,
      View_size(sub->view),
      alpha * View_size(sub->view));

  /* Update samplers */
  for (i = 0; i < CustomPeerMap_size(sub->push_map); i++)
    {
      update_peer = CustomPeerMap_get_peer_by_index(sub->push_map, i);
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Updating with peer %s from push list\n",
          GNUNET_i2s(update_peer));
      insert_in_sampler(sub, update_peer);
      clean_peer(sub, update_peer); /* This cleans only if it is not in the view */
    }

  for (i = 0; i < CustomPeerMap_size(sub->pull_map); i++)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Updating with peer %s from pull list\n",
          GNUNET_i2s(CustomPeerMap_get_peer_by_index(sub->pull_map, i)));
      insert_in_sampler(sub, CustomPeerMap_get_peer_by_index(sub->pull_map, i));
      /* This cleans only if it is not in the view */
      clean_peer(sub, CustomPeerMap_get_peer_by_index(sub->pull_map, i));
    }


  /* Empty push/pull lists */
  CustomPeerMap_clear(sub->push_map);
  CustomPeerMap_clear(sub->pull_map);

  if (sub == msub)
    {
      GNUNET_STATISTICS_set(stats,
                            "view size",
                            View_size(sub->view),
                            GNUNET_NO);
    }

  struct GNUNET_TIME_Relative time_next_round;

  time_next_round = compute_rand_delay(sub->round_interval, 2);

  /* Schedule next round */
  sub->do_round_task = GNUNET_SCHEDULER_add_delayed(time_next_round,
                                                    &do_round, sub);
  LOG(GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
}


void
init_peer_cb(void *cls,
             const struct GNUNET_PeerIdentity *peer,
             int tunnel,  /* "Do we have a tunnel towards this peer?" */
             unsigned int n_paths,  /* "Number of known paths towards this peer" */
             unsigned int best_path)  /* "How long is the best path?
                                       * (0 = unknown, 1 = ourselves, 2 = neighbor)" */
{
  struct Sub *sub = cls;

  (void)tunnel;
  (void)n_paths;
  (void)best_path;

  if (NULL != peer)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Got peer_id %s from cadet\n",
          GNUNET_i2s(peer));
      got_peer(sub, peer);
    }
}


static int
valid_peers_iterator(void *cls,
                     const struct GNUNET_PeerIdentity *peer)
{
  struct Sub *sub = cls;

  if (NULL != peer)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Got stored, valid peer %s\n",
          GNUNET_i2s(peer));
      got_peer(sub, peer);
    }
  return GNUNET_YES;
}


void
process_peerinfo_peers(void *cls,
                       const struct GNUNET_PeerIdentity *peer,
                       const struct GNUNET_HELLO_Message *hello,
                       const char *err_msg)
{
  struct Sub *sub = cls;

  (void)hello;
  (void)err_msg;

  if (NULL != peer)
    {
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Got peer_id %s from peerinfo\n",
          GNUNET_i2s(peer));
      got_peer(sub, peer);
    }
}


static void
shutdown_task(void *cls)
{
  (void)cls;
  struct ClientContext *client_ctx;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "RPS service is going down\n");

  /* Clean all clients */
  for (client_ctx = cli_ctx_head;
       NULL != cli_ctx_head;
       client_ctx = cli_ctx_head)
    {
      destroy_cli_ctx(client_ctx);
    }
  if (NULL != msub)
    {
      destroy_sub(msub);
      msub = NULL;
    }

  /* Disconnect from other services */
  GNUNET_PEERINFO_notify_cancel(peerinfo_notify_handle);
  GNUNET_PEERINFO_disconnect(peerinfo_handle);
  peerinfo_handle = NULL;
  GNUNET_NSE_disconnect(nse);
  if (NULL != map_single_hop)
    {
      /* core_init was called - core was initialised */
      /* disconnect first, so no callback tries to access missing peermap */
      GNUNET_CORE_disconnect(core_handle);
      core_handle = NULL;
      GNUNET_CONTAINER_multipeermap_destroy(map_single_hop);
      map_single_hop = NULL;
    }

  if (NULL != stats)
    {
      GNUNET_STATISTICS_destroy(stats,
                                GNUNET_NO);
      stats = NULL;
    }
  GNUNET_CADET_disconnect(cadet_handle);
  cadet_handle = NULL;
#if ENABLE_MALICIOUS
  struct AttackedPeer *tmp_att_peer;
  GNUNET_array_grow(mal_peers,
                    num_mal_peers,
                    0);
  if (NULL != mal_peer_set)
    GNUNET_CONTAINER_multipeermap_destroy(mal_peer_set);
  if (NULL != att_peer_set)
    GNUNET_CONTAINER_multipeermap_destroy(att_peer_set);
  while (NULL != att_peers_head)
    {
      tmp_att_peer = att_peers_head;
      GNUNET_CONTAINER_DLL_remove(att_peers_head,
                                  att_peers_tail,
                                  tmp_att_peer);
      GNUNET_free(tmp_att_peer);
    }
#endif /* ENABLE_MALICIOUS */
  close_all_files();
}


static void *
client_connect_cb(void *cls,
                  struct GNUNET_SERVICE_Client *client,
                  struct GNUNET_MQ_Handle *mq)
{
  struct ClientContext *cli_ctx;

  (void)cls;

  LOG(GNUNET_ERROR_TYPE_DEBUG,
      "Client connected\n");
  if (NULL == client)
    return client; /* Server was destroyed before a client connected. Shutting down */
  cli_ctx = GNUNET_new(struct ClientContext);
  cli_ctx->mq = mq;
  cli_ctx->view_updates_left = -1;
  cli_ctx->stream_update = GNUNET_NO;
  cli_ctx->client = client;
  GNUNET_CONTAINER_DLL_insert(cli_ctx_head,
                              cli_ctx_tail,
                              cli_ctx);
  return cli_ctx;
}

static void
client_disconnect_cb(void *cls,
                     struct GNUNET_SERVICE_Client *client,
                     void *internal_cls)
{
  struct ClientContext *cli_ctx = internal_cls;

  (void)cls;
  GNUNET_assert(client == cli_ctx->client);
  if (NULL == client)
    {/* shutdown task - destroy all clients */
      while (NULL != cli_ctx_head)
        destroy_cli_ctx(cli_ctx_head);
    }
  else
    { /* destroy this client */
      LOG(GNUNET_ERROR_TYPE_DEBUG,
          "Client disconnected. Destroy its context.\n");
      destroy_cli_ctx(cli_ctx);
    }
}


static void
run(void *cls,
    const struct GNUNET_CONFIGURATION_Handle *c,
    struct GNUNET_SERVICE_Handle *service)
{
  struct GNUNET_TIME_Relative round_interval;
  long long unsigned int sampler_size;
  char hash_port_string[] = GNUNET_APPLICATION_PORT_RPS;
  struct GNUNET_HashCode hash;

  (void)cls;
  (void)service;

  GNUNET_log_setup("rps",
                   GNUNET_error_type_to_string(GNUNET_ERROR_TYPE_DEBUG),
                   NULL);
  cfg = c;
  /* Get own ID */
  GNUNET_CRYPTO_get_peer_identity(cfg,
                                  &own_identity);  // TODO check return value
  GNUNET_log(GNUNET_ERROR_TYPE_INFO,
             "STARTING SERVICE (rps) for peer [%s]\n",
             GNUNET_i2s(&own_identity));
#if ENABLE_MALICIOUS
  GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
             "Malicious execution compiled in.\n");
#endif /* ENABLE_MALICIOUS */

  /* Get time interval from the configuration */
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_time(cfg,
                                          "RPS",
                                          "ROUNDINTERVAL",
                                          &round_interval))
    {
      GNUNET_log_config_missing(GNUNET_ERROR_TYPE_ERROR,
                                "RPS", "ROUNDINTERVAL");
      GNUNET_SCHEDULER_shutdown();
      return;
    }

  /* Get initial size of sampler/view from the configuration */
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_number(cfg,
                                            "RPS",
                                            "MINSIZE",
                                            &sampler_size))
    {
      GNUNET_log_config_missing(GNUNET_ERROR_TYPE_ERROR,
                                "RPS", "MINSIZE");
      GNUNET_SCHEDULER_shutdown();
      return;
    }

  cadet_handle = GNUNET_CADET_connect(cfg);
  GNUNET_assert(NULL != cadet_handle);
  core_handle = GNUNET_CORE_connect(cfg,
                                    NULL,  /* cls */
                                    core_init,  /* init */
                                    core_connects,  /* connects */
                                    core_disconnects,  /* disconnects */
                                    NULL);  /* handlers */
  GNUNET_assert(NULL != core_handle);


  alpha = 0.45;
  beta = 0.45;


  /* Set up main Sub */
  GNUNET_CRYPTO_hash(hash_port_string,
                     strlen(hash_port_string),
                     &hash);
  msub = new_sub(&hash,
                 sampler_size, /* Will be overwritten by config */
                 round_interval);


  peerinfo_handle = GNUNET_PEERINFO_connect(cfg);

  /* connect to NSE */
  nse = GNUNET_NSE_connect(cfg, nse_callback, NULL);

  //LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
  //GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, msub);
  // TODO send push/pull to each of those peers?
  LOG(GNUNET_ERROR_TYPE_DEBUG, "Requesting stored valid peers\n");
  restore_valid_peers(msub);
  get_valid_peers(msub->valid_peers, valid_peers_iterator, msub);

  peerinfo_notify_handle = GNUNET_PEERINFO_notify(cfg,
                                                  GNUNET_NO,
                                                  process_peerinfo_peers,
                                                  msub);

  LOG(GNUNET_ERROR_TYPE_INFO, "Ready to receive requests from clients\n");

  GNUNET_SCHEDULER_add_shutdown(&shutdown_task, NULL);
  stats = GNUNET_STATISTICS_create("rps", cfg);
}


GNUNET_SERVICE_MAIN
  ("rps",
  GNUNET_SERVICE_OPTION_NONE,
  &run,
  &client_connect_cb,
  &client_disconnect_cb,
  NULL,
  GNUNET_MQ_hd_var_size(client_seed,
                        GNUNET_MESSAGE_TYPE_RPS_CS_SEED,
                        struct GNUNET_RPS_CS_SeedMessage,
                        NULL),
#if ENABLE_MALICIOUS
  GNUNET_MQ_hd_var_size(client_act_malicious,
                        GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS,
                        struct GNUNET_RPS_CS_ActMaliciousMessage,
                        NULL),
#endif /* ENABLE_MALICIOUS */
  GNUNET_MQ_hd_fixed_size(client_view_request,
                          GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_VIEW_REQUEST,
                          struct GNUNET_RPS_CS_DEBUG_ViewRequest,
                          NULL),
  GNUNET_MQ_hd_fixed_size(client_view_cancel,
                          GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_VIEW_CANCEL,
                          struct GNUNET_MessageHeader,
                          NULL),
  GNUNET_MQ_hd_fixed_size(client_stream_request,
                          GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_STREAM_REQUEST,
                          struct GNUNET_RPS_CS_DEBUG_StreamRequest,
                          NULL),
  GNUNET_MQ_hd_fixed_size(client_stream_cancel,
                          GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_STREAM_CANCEL,
                          struct GNUNET_MessageHeader,
                          NULL),
  GNUNET_MQ_hd_fixed_size(client_start_sub,
                          GNUNET_MESSAGE_TYPE_RPS_CS_SUB_START,
                          struct GNUNET_RPS_CS_SubStartMessage,
                          NULL),
  GNUNET_MQ_hd_fixed_size(client_stop_sub,
                          GNUNET_MESSAGE_TYPE_RPS_CS_SUB_STOP,
                          struct GNUNET_RPS_CS_SubStopMessage,
                          NULL),
  GNUNET_MQ_handler_end());

/* end of gnunet-service-rps.c */