Merge branch 'credentials' of git+ssh://gnunet.org/gnunet into credentials
[oweals/gnunet.git] / src / social / gnunet-service-social.c
index ec4b18d0b8ec231e81dcc96bcf9a3947f193482b..e6ee24a4fd5dbc2b5ef462b969590b5ea1b6f892 100644 (file)
@@ -1,6 +1,6 @@
 /*
  * This file is part of GNUnet
- * Copyright (C) 2013 Christian Grothoff (and other contributing authors)
+ * Copyright (C) 2013 GNUnet e.V.
  *
  * GNUnet is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published
@@ -31,7 +31,6 @@
 #include "gnunet_util_lib.h"
 #include "gnunet_constants.h"
 #include "gnunet_protocols.h"
-#include "gnunet_core_service.h"
 #include "gnunet_identity_service.h"
 #include "gnunet_namestore_service.h"
 #include "gnunet_gns_service.h"
  */
 static const struct GNUNET_CONFIGURATION_Handle *cfg;
 
+/**
+ * Service handle.
+ */
+static struct GNUNET_SERVICE_Handle *service;
+
 /* Handles to other services */
-static struct GNUNET_CORE_Handle *core;
 static struct GNUNET_IDENTITY_Handle *id;
 static struct GNUNET_GNS_Handle *gns;
 static struct GNUNET_NAMESTORE_Handle *namestore;
@@ -59,11 +62,6 @@ static struct GNUNET_STATISTICS_Handle *stats;
  */
 static struct GNUNET_PeerIdentity this_peer;
 
-/**
- * Notification context, simplifies client broadcasts.
- */
-static struct GNUNET_SERVER_NotificationContext *nc;
-
 /**
  * All connected hosts.
  * H(place_pub_key) -> struct Host
@@ -139,7 +137,7 @@ struct FragmentTransmitQueue
   struct FragmentTransmitQueue *prev;
   struct FragmentTransmitQueue *next;
 
-  struct GNUNET_SERVER_Client *client;
+  struct GNUNET_SERVICE_Client *client;
 
   /**
    * Pointer to the next message part inside the data after this struct.
@@ -171,7 +169,7 @@ struct MessageTransmitQueue
   struct FragmentTransmitQueue *frags_head;
   struct FragmentTransmitQueue *frags_tail;
 
-  struct GNUNET_SERVER_Client *client;
+  struct GNUNET_SERVICE_Client *client;
 };
 
 /**
@@ -182,7 +180,7 @@ struct ClientListItem
   struct ClientListItem *prev;
   struct ClientListItem *next;
 
-  struct GNUNET_SERVER_Client *client;
+  struct GNUNET_SERVICE_Client *client;
 };
 
 
@@ -229,10 +227,10 @@ struct Place
    */
   struct GNUNET_HashCode ego_pub_hash;
 
-  uint64_t file_message_id;
-  uint64_t file_fragment_offset;
-  uint64_t file_size;
-  uint64_t file_offset;
+  /**
+   * Slicer for processing incoming messages.
+   */
+  struct GNUNET_PSYC_Slicer *slicer;
 
   /**
    * Last message ID received for the place.
@@ -241,9 +239,14 @@ struct Place
   uint64_t max_message_id;
 
   /**
-   * Is this a host (#GNUNET_YES), or guest (#GNUNET_NO)?
+   * Offset where the file is currently being written.
    */
-  uint8_t is_host;
+  uint64_t file_offset;
+
+  /**
+   * Whether or not to save the file (#GNUNET_YES or #GNUNET_NO)
+   */
+  uint8_t file_save;
 
   /**
    * Is this place ready to receive messages from client?
@@ -256,6 +259,16 @@ struct Place
    * #GNUNET_YES or #GNUNET_NO
    */
   uint8_t is_disconnected;
+
+  /**
+   * Is this a host (#GNUNET_YES), or guest (#GNUNET_NO)?
+   */
+  uint8_t is_host;
+
+  union {
+    struct Host *host;
+    struct Guest *guest;
+  };
 };
 
 
@@ -267,7 +280,7 @@ struct Host
   /**
    * Place struct common for Host and Guest
    */
-  struct Place plc;
+  struct Place place;
 
   /**
    * Handle for the multicast origin.
@@ -285,6 +298,11 @@ struct Host
    */
   struct GNUNET_CONTAINER_MultiHashMap *join_reqs;
 
+  /**
+   * Messages being relayed.
+   */
+  struct GNUNET_CONTAINER_MultiHashMap *relay_msgs;
+
   /**
    * @see enum GNUNET_PSYC_Policy
    */
@@ -300,7 +318,7 @@ struct Guest
   /**
    * Place struct common for Host and Guest.
    */
-  struct Place plc;
+  struct Place place;
 
   /**
    * Handle for the PSYC slave.
@@ -349,10 +367,15 @@ struct Guest
  */
 struct Client
 {
+  /**
+   * Client handle.
+   */
+  struct GNUNET_SERVICE_Client *client;
+
   /**
    * Place where the client entered.
    */
-  struct Place *plc;
+  struct Place *place;
 
   /**
    * Message queue for the message currently being transmitted
@@ -382,8 +405,7 @@ struct Ego {
 
 struct OperationClosure
 {
-  struct GNUNET_SERVER_Client *client;
-  struct Place *plc;
+  struct Client *client;
   uint64_t op_id;
   uint32_t flags;
 };
@@ -393,14 +415,32 @@ static int
 psyc_transmit_message (struct Place *plc);
 
 
+/**
+ * Clean up place data structures after a client disconnected.
+ *
+ * @param cls the `struct Place` to clean up
+ */
 static void
-cleanup_place (struct Place *plc);
+cleanup_place (void *cls);
 
 
-int
-place_entry_cleanup (void *cls, const struct GNUNET_HashCode *key, void *value)
+static struct MessageTransmitQueue *
+psyc_transmit_queue_message (struct Place *plc,
+                             struct GNUNET_SERVICE_Client *client,
+                             size_t data_size,
+                             const void *data,
+                             uint16_t first_ptype, uint16_t last_ptype,
+                             struct MessageTransmitQueue *tmit_msg);
+
+
+static int
+place_entry_cleanup (void *cls,
+                     const struct GNUNET_HashCode *key,
+                     void *value)
 {
-  cleanup_place (value);
+  struct Place *plc = value;
+
+  cleanup_place (plc);
   return GNUNET_YES;
 }
 
@@ -409,24 +449,13 @@ place_entry_cleanup (void *cls, const struct GNUNET_HashCode *key, void *value)
  * Task run during shutdown.
  *
  * @param cls unused
- * @param tc unused
  */
 static void
-shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+shutdown_task (void *cls)
 {
   GNUNET_CONTAINER_multihashmap_iterate (hosts, place_entry_cleanup, NULL);
   GNUNET_CONTAINER_multihashmap_iterate (guests, place_entry_cleanup, NULL);
 
-  if (NULL != nc)
-  {
-    GNUNET_SERVER_notification_context_destroy (nc);
-    nc = NULL;
-  }
-  if (NULL != core)
-  {
-    GNUNET_CORE_disconnect (core);
-    core = NULL;
-  }
   if (NULL != id)
   {
     GNUNET_IDENTITY_disconnect (id);
@@ -456,11 +485,12 @@ shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 static void
 cleanup_host (struct Host *hst)
 {
-  struct Place *plc = &hst->plc;
+  struct Place *plc = &hst->place;
 
   if (NULL != hst->master)
     GNUNET_PSYC_master_stop (hst->master, GNUNET_NO, NULL, NULL); // FIXME
   GNUNET_CONTAINER_multihashmap_destroy (hst->join_reqs);
+  GNUNET_CONTAINER_multihashmap_destroy (hst->relay_msgs);
   GNUNET_CONTAINER_multihashmap_remove (hosts, &plc->pub_key_hash, plc);
 }
 
@@ -471,10 +501,10 @@ cleanup_host (struct Host *hst)
 static void
 cleanup_guest (struct Guest *gst)
 {
-  struct Place *plc = &gst->plc;
+  struct Place *plc = &gst->place;
   struct GNUNET_CONTAINER_MultiHashMap *
     plc_gst = GNUNET_CONTAINER_multihashmap_get (place_guests,
-                                                &plc->pub_key_hash);
+                                                 &plc->pub_key_hash);
   GNUNET_assert (NULL != plc_gst); // FIXME
   GNUNET_CONTAINER_multihashmap_remove (plc_gst, &plc->ego_pub_hash, gst);
 
@@ -498,10 +528,14 @@ cleanup_guest (struct Guest *gst)
 
 /**
  * Clean up place data structures after a client disconnected.
+ *
+ * @param cls the `struct Place` to clean up
  */
 static void
-cleanup_place (struct Place *plc)
+cleanup_place (void *cls)
 {
+  struct Place *plc = cls;
+
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "%p Cleaning up place %s\n",
               plc, GNUNET_h2s (&plc->pub_key_hash));
@@ -509,14 +543,9 @@ cleanup_place (struct Place *plc)
   (GNUNET_YES == plc->is_host)
     ? cleanup_host ((struct Host *) plc)
     : cleanup_guest ((struct Guest *) plc);
-  GNUNET_free (plc);
-}
-
 
-static void
-schedule_cleanup_place (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
-  cleanup_place (cls);
+  GNUNET_PSYC_slicer_destroy (plc->slicer);
+  GNUNET_free (plc);
 }
 
 
@@ -524,30 +553,22 @@ schedule_cleanup_place (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc
  * Called whenever a client is disconnected.
  * Frees our resources associated with that client.
  *
- * @param cls Closure.
- * @param client Identification of the client.
+ * @param cls closure
+ * @param client identification of the client
+ * @param app_ctx must match @a client
  */
 static void
-client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
+client_notify_disconnect (void *cls,
+                          struct GNUNET_SERVICE_Client *client,
+                          void *app_ctx)
 {
-  if (NULL == client)
-    return;
+  struct Client *c = app_ctx;
+  struct Place *plc = c->place;
 
-  struct Client *
-    ctx = GNUNET_SERVER_client_get_user_context (client, struct Client);
-  if (NULL == ctx)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-                "%p User context is NULL in client_disconnect()\n", ctx);
-    return;
-  }
-
-  struct Place *plc = ctx->plc;
+  if (NULL != c->app_id)
+    GNUNET_free (c->app_id);
 
-  if (NULL != ctx->app_id)
-    GNUNET_free (ctx->app_id);
-
-  GNUNET_free (ctx);
+  GNUNET_free (c);
 
   if (NULL == plc)
     return; // application client, nothing to do
@@ -571,15 +592,40 @@ client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
 }
 
 
+/**
+ * A new client connected.
+ *
+ * @param cls NULL
+ * @param client client to add
+ * @param mq message queue for @a client
+ * @return @a client
+ */
+static void *
+client_notify_connect (void *cls,
+                       struct GNUNET_SERVICE_Client *client,
+                       struct GNUNET_MQ_Handle *mq)
+{
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client connected: %p\n", client);
+
+  struct Client *c = GNUNET_malloc (sizeof (*c));
+  c->client = client;
+
+  return c;
+}
+
+
 /**
  * Send message to a client.
  */
 static inline void
-client_send_msg (struct GNUNET_SERVER_Client *client,
+client_send_msg (struct GNUNET_SERVICE_Client *client,
                  const struct GNUNET_MessageHeader *msg)
 {
-  GNUNET_SERVER_notification_context_add (nc, client);
-  GNUNET_SERVER_notification_context_unicast (nc, client, msg, GNUNET_NO);
+  struct GNUNET_MQ_Envelope *
+    env = GNUNET_MQ_msg_copy (msg);
+
+  GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq (client),
+                  env);
 }
 
 
@@ -617,7 +663,7 @@ place_send_msg (const struct Place *plc,
  *        Size of @a data.
  */
 static void
-client_send_result (struct GNUNET_SERVER_Client *client, uint64_t op_id,
+client_send_result (struct GNUNET_SERVICE_Client *client, uint64_t op_id,
                     int64_t result_code, const void *data, uint16_t data_size)
 {
   struct GNUNET_OperationResultMessage *res;
@@ -628,7 +674,7 @@ client_send_result (struct GNUNET_SERVER_Client *client, uint64_t op_id,
   res->result_code = GNUNET_htonll (result_code);
   res->op_id = op_id;
   if (0 < data_size)
-    memcpy (&res[1], data, data_size);
+    GNUNET_memcpy (&res[1], data, data_size);
 
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "%p Sending result to client for operation #%" PRIu64 ": "
@@ -641,10 +687,10 @@ client_send_result (struct GNUNET_SERVER_Client *client, uint64_t op_id,
 
 
 static void
-client_send_host_enter_ack (struct GNUNET_SERVER_Client *client,
+client_send_host_enter_ack (struct GNUNET_SERVICE_Client *client,
                             struct Host *hst, uint32_t result)
 {
-  struct Place *plc = &hst->plc;
+  struct Place *plc = &hst->place;
 
   struct HostEnterAck hack;
   hack.header.type = htons (GNUNET_MESSAGE_TYPE_SOCIAL_HOST_ENTER_ACK);
@@ -667,7 +713,7 @@ static void
 psyc_master_started (void *cls, int result, uint64_t max_message_id)
 {
   struct Host *hst = cls;
-  struct Place *plc = &hst->plc;
+  struct Place *plc = &hst->place;
   plc->max_message_id = max_message_id;
   plc->is_ready = GNUNET_YES;
 
@@ -690,7 +736,7 @@ psyc_recv_join_request (void *cls,
   GNUNET_CRYPTO_hash (slave_key, sizeof (*slave_key), &slave_key_hash);
   GNUNET_CONTAINER_multihashmap_put (hst->join_reqs, &slave_key_hash, jh,
                                      GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
-  place_send_msg (&hst->plc, &req->header);
+  place_send_msg (&hst->place, &req->header);
 }
 
 
@@ -701,7 +747,7 @@ static void
 psyc_slave_connected (void *cls, int result, uint64_t max_message_id)
 {
   struct Guest *gst = cls;
-  struct Place *plc = &gst->plc;
+  struct Place *plc = &gst->place;
   plc->max_message_id = max_message_id;
   plc->is_ready = GNUNET_YES;
 
@@ -725,99 +771,305 @@ psyc_recv_join_dcsn (void *cls,
                      const struct GNUNET_PSYC_Message *join_msg)
 {
   struct Guest *gst = cls;
-  place_send_msg (&gst->plc, &dcsn->header);
+  place_send_msg (&gst->place, &dcsn->header);
 }
 
+
 /**
- * Save _file data to disk.
+ * Called when a PSYC master or slave receives a message.
  */
-void
-psyc_recv_file (struct Place *plc, const struct GNUNET_PSYC_MessageHeader *msg,
-                uint32_t flags, uint64_t message_id, uint64_t fragment_offset,
-                const char *method_name, struct GNUNET_ENV_Environment *env,
-                const void *data, uint16_t data_size)
+static void
+psyc_recv_message (void *cls,
+                   const struct GNUNET_PSYC_MessageHeader *msg)
+{
+  struct Place *plc = cls;
+
+  char *str = GNUNET_CRYPTO_ecdsa_public_key_to_string (&msg->slave_pub_key);
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "%p Received PSYC message of size %u from %s.\n",
+              plc, ntohs (msg->header.size), str);
+  GNUNET_free (str);
+
+  GNUNET_PSYC_slicer_message (plc->slicer, msg);
+
+  place_send_msg (plc, &msg->header);
+}
+
+
+/**
+ * Relay a message part received from a guest to the the place.
+ *
+ * @param hst
+ *        Host.
+ * @param pmsg
+ *        Message part.
+ * @param nym_pub_key
+ *        Nym the message is received from.
+ */
+static void
+host_relay_message_part (struct Host *hst,
+                         const struct GNUNET_MessageHeader *pmsg,
+                         const struct GNUNET_CRYPTO_EcdsaPublicKey *nym_pub_key)
+{
+  /* separate queue per nym */
+  struct GNUNET_HashCode nym_pub_hash;
+  GNUNET_CRYPTO_hash (nym_pub_key, sizeof (*nym_pub_key), &nym_pub_hash);
+
+  struct MessageTransmitQueue *
+    tmit_msg = GNUNET_CONTAINER_multihashmap_get (hst->relay_msgs, &nym_pub_hash);
+
+  uint16_t ptype = ntohs (pmsg->type);
+
+  if (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD == ptype)
+  {
+    /* FIXME: last message was unfinished, cancel & remove from queue */
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+               "FIXME: last message was unfinished.\n");
+  }
+
+  tmit_msg = psyc_transmit_queue_message (&hst->place, NULL, ntohs (pmsg->size),
+                                          pmsg, ptype, ptype, tmit_msg);
+
+  switch (ptype)
+  {
+  case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD:
+    GNUNET_assert (GNUNET_YES == GNUNET_CONTAINER_multihashmap_put
+                                     (hst->relay_msgs, &nym_pub_hash, tmit_msg,
+                                       GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+    break;
+  case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_END:
+  case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_CANCEL:
+    GNUNET_assert (GNUNET_YES == GNUNET_CONTAINER_multihashmap_remove
+                                    (hst->relay_msgs, &nym_pub_hash, tmit_msg));
+    break;
+  }
+}
+
+
+/**
+ * Received a method to be relayed from a guest.
+ */
+static void
+place_recv_relay_method (void *cls,
+                         const struct GNUNET_PSYC_MessageHeader *msg,
+                         const struct GNUNET_PSYC_MessageMethod *meth,
+                         uint64_t message_id,
+                         const char *method_name)
+{
+  struct Place *plc = cls;
+
+  if (GNUNET_PSYC_MESSAGE_REQUEST & ntohs (msg->flags)
+      && GNUNET_YES == plc->is_host)
+  {
+    struct Host *hst = cls;
+    host_relay_message_part (hst, &meth->header, &msg->slave_pub_key);
+  }
+}
+
+
+/**
+ * Received a modifier to be relayed from a guest.
+ */
+static void
+place_recv_relay_modifier (void *cls,
+                           const struct GNUNET_PSYC_MessageHeader *msg,
+                           const struct GNUNET_MessageHeader *pmsg,
+                           uint64_t message_id,
+                           enum GNUNET_PSYC_Operator oper,
+                           const char *name,
+                           const void *value,
+                           uint16_t value_size,
+                           uint16_t full_value_size)
+{
+  struct Place *plc = cls;
+
+  if (GNUNET_PSYC_MESSAGE_REQUEST & ntohs (msg->flags)
+      && GNUNET_YES == plc->is_host)
+  {
+    struct Host *hst = cls;
+    host_relay_message_part (hst, pmsg, &msg->slave_pub_key);
+  }
+}
+
+/**
+ * Received a data fragment to be relayed from a guest.
+ */
+static void
+place_recv_relay_data (void *cls,
+                       const struct GNUNET_PSYC_MessageHeader *msg,
+                       const struct GNUNET_MessageHeader *pmsg,
+                       uint64_t message_id,
+                       const void *data,
+                       uint16_t data_size)
+{
+  struct Place *plc = cls;
+
+  if (GNUNET_PSYC_MESSAGE_REQUEST & ntohs (msg->flags)
+      && GNUNET_YES == plc->is_host)
+  {
+    struct Host *hst = cls;
+    host_relay_message_part (hst, pmsg, &msg->slave_pub_key);
+  }
+}
+
+
+/**
+ * Received end of message to be relayed from a guest.
+ */
+static void
+place_recv_relay_eom (void *cls,
+                      const struct GNUNET_PSYC_MessageHeader *msg,
+                      const struct GNUNET_MessageHeader *pmsg,
+                      uint64_t message_id,
+                      uint8_t is_cancelled)
+{
+  struct Place *plc = cls;
+
+  if (GNUNET_PSYC_MESSAGE_REQUEST & ntohs (msg->flags)
+      && GNUNET_YES == plc->is_host)
+  {
+    struct Host *hst = cls;
+    host_relay_message_part (hst, pmsg, &msg->slave_pub_key);
+  }
+}
+
+
+/**
+ * Received a method to be saved to disk.
+ *
+ * Create a new file for writing the data part of the message into,
+ * if the file does not yet exist.
+ */
+static void
+place_recv_save_method (void *cls,
+                        const struct GNUNET_PSYC_MessageHeader *msg,
+                        const struct GNUNET_PSYC_MessageMethod *meth,
+                        uint64_t message_id,
+                        const char *method_name)
 {
-  if (plc->file_message_id != message_id)
+  struct Place *plc = cls;
+  plc->file_offset = 0;
+  plc->file_save = GNUNET_NO;
+
+  char *place_pub_str = GNUNET_CRYPTO_eddsa_public_key_to_string (&plc->pub_key);
+  char *filename = NULL;
+  GNUNET_asprintf (&filename, "%s%c" "%s%c" "%s%c" "%" PRIu64 ".part",
+                   dir_social, DIR_SEPARATOR,
+                   "files", DIR_SEPARATOR,
+                   place_pub_str, DIR_SEPARATOR,
+                   GNUNET_ntohll (msg->message_id));
+  GNUNET_free (place_pub_str);
+
+  /* save if does not already exist */
+  if (GNUNET_YES != GNUNET_DISK_file_test (filename))
   {
-    if (0 != fragment_offset)
+    if (0 == GNUNET_DISK_fn_write (filename, NULL, 0,
+                                   GNUNET_DISK_PERM_USER_READ
+                                   | GNUNET_DISK_PERM_USER_WRITE))
+    {
+      plc->file_save = GNUNET_YES;
+    }
+    else
     {
-      /* unexpected message ID */
       GNUNET_break (0);
-      return;
     }
-
-    /* new file */
-    plc->file_offset = 0;
   }
+  GNUNET_free (filename);
+}
 
-  struct GNUNET_CRYPTO_HashAsciiEncoded place_pub_hash_ascii;
-  memcpy (&place_pub_hash_ascii.encoding,
-          GNUNET_h2s_full (&plc->pub_key_hash), sizeof (place_pub_hash_ascii));
 
+/**
+ * Received a data fragment to be saved to disk.
+ *
+ * Append data fragment to the file.
+ */
+static void
+place_recv_save_data (void *cls,
+                      const struct GNUNET_PSYC_MessageHeader *msg,
+                      const struct GNUNET_MessageHeader *pmsg,
+                      uint64_t message_id,
+                      const void *data,
+                      uint16_t data_size)
+{
+  struct Place *plc = cls;
+  if (GNUNET_YES != plc->file_save)
+    return;
+
+  char *place_pub_str = GNUNET_CRYPTO_eddsa_public_key_to_string (&plc->pub_key);
   char *filename = NULL;
-  GNUNET_asprintf (&filename, "%s%c%s%c%s%c%" PRIu64,
+  GNUNET_asprintf (&filename, "%s%c" "%s%c" "%s%c" "%" PRIu64 ".part",
                    dir_social, DIR_SEPARATOR,
                    "files", DIR_SEPARATOR,
-                   place_pub_hash_ascii.encoding, DIR_SEPARATOR,
-                   message_id);
-  GNUNET_DISK_directory_create_for_file (filename);
+                   place_pub_str, DIR_SEPARATOR,
+                   GNUNET_ntohll (msg->message_id));
+  GNUNET_free (place_pub_str);
+  if (GNUNET_SYSERR == GNUNET_DISK_directory_create_for_file (filename))
+  {
+    GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "create", filename);
+    GNUNET_free (filename);
+    return;
+  }
+
   struct GNUNET_DISK_FileHandle *
     fh = GNUNET_DISK_file_open (filename, GNUNET_DISK_OPEN_WRITE,
-                                GNUNET_DISK_PERM_USER_READ
-                                | GNUNET_DISK_PERM_USER_WRITE);
-  GNUNET_free (filename);
-
-  GNUNET_DISK_file_seek (fh, plc->file_offset, GNUNET_DISK_SEEK_SET);
-  GNUNET_DISK_file_write (fh, data, data_size);
-  GNUNET_DISK_file_close (fh);
+                                GNUNET_DISK_PERM_NONE);
+  if (NULL != fh)
+  {
+    if (plc->file_offset != GNUNET_DISK_file_seek
+                           (fh, plc->file_offset, GNUNET_DISK_SEEK_SET)) {
+      GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "seek", filename);
+      GNUNET_DISK_file_close (fh);
+      GNUNET_free (filename);
+      return;
+    }
+    GNUNET_DISK_file_write (fh, data, data_size);
+    GNUNET_DISK_file_close (fh);
+    GNUNET_free (filename);
+  }
+  else
+  {
+    GNUNET_free (filename);
+    GNUNET_break (0);
+  }
   plc->file_offset += data_size;
 }
 
 
 /**
- * Called when a PSYC master or slave receives a message.
+ * Received end of message to be saved to disk.
+ *
+ * Remove .part ending from the filename.
  */
 static void
-psyc_recv_message (void *cls,
-                   uint64_t message_id,
-                   uint32_t flags,
-                   const struct GNUNET_PSYC_MessageHeader *msg)
+place_recv_save_eom (void *cls,
+                     const struct GNUNET_PSYC_MessageHeader *msg,
+                     const struct GNUNET_MessageHeader *pmsg,
+                     uint64_t message_id,
+                     uint8_t is_cancelled)
 {
   struct Place *plc = cls;
+  if (GNUNET_YES != plc->file_save)
+    return;
 
-  char *str = GNUNET_CRYPTO_ecdsa_public_key_to_string (&msg->slave_key);
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-              "%p Received PSYC message of size %u from %s.\n",
-              plc, ntohs (msg->header.size), str);
-  GNUNET_free (str);
-
-  /* process message */
-  /* FIXME: use slicer */
-  const char *method_name = NULL;
-  struct GNUNET_ENV_Environment *env = GNUNET_ENV_environment_create ();
-  const void *data = NULL;
-  uint16_t data_size = 0;
+  char *place_pub_str = GNUNET_CRYPTO_eddsa_public_key_to_string (&plc->pub_key);
+  char *fn = NULL;
+  GNUNET_asprintf (&fn, "%s%c%s%c%s%c%" PRIu64,
+                   dir_social, DIR_SEPARATOR,
+                   "files", DIR_SEPARATOR,
+                   place_pub_str, DIR_SEPARATOR,
+                   GNUNET_ntohll (msg->message_id));
+  GNUNET_free (place_pub_str);
+  char *fn_part = NULL;
+  GNUNET_asprintf (&fn_part, "%s.part", fn);
 
-  if (GNUNET_SYSERR == GNUNET_PSYC_message_parse (msg, &method_name, env, &data, &data_size))
-  {
-    GNUNET_break (0);
-  }
-  else
-  {
-    char *method_found = strstr (method_name, "_file");
-    if (method_name == method_found)
-    {
-      method_found += strlen ("_file");
-      if (('\0' == *method_found) || ('_' == *method_found))
-      {
-        psyc_recv_file (plc, msg, flags, message_id, GNUNET_ntohll (msg->fragment_offset),
-                        method_name, env, data, data_size);
-      }
-    }
+  if (rename (fn_part, fn)) {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                 "Failed to rename %s into %s: %s (%d)\n",
+                 fn_part, fn, strerror (errno), errno);
   }
-  GNUNET_ENV_environment_destroy (env);
 
-  place_send_msg (plc, &msg->header);
+  GNUNET_free (fn);
+  GNUNET_free (fn_part);
 }
 
 
@@ -827,9 +1079,10 @@ psyc_recv_message (void *cls,
 static void
 place_init (struct Place *plc)
 {
-
+  plc->slicer = GNUNET_PSYC_slicer_create ();
 }
 
+
 /**
  * Add a place to the @e places hash map.
  *
@@ -878,8 +1131,8 @@ place_add (const struct PlaceEnterRequest *ereq)
  *
  * @param app_id
  *        Application ID.
- * @param msg
- *        Entry message.
+ * @param ereq
+ *        Entry request.
  *
  * @return #GNUNET_OK if the place was added
  *         #GNUNET_NO if the place already exists in the hash map
@@ -944,10 +1197,9 @@ app_place_add (const char *app_id,
     }
   }
 
-
-  size_t app_id_size = strlen (app_id);
+  size_t app_id_size = strlen (app_id) + 1;
   void *app_id_value = GNUNET_malloc (app_id_size);
-  memcpy (app_id_value, app_id, app_id_size);
+  GNUNET_memcpy (app_id_value, app_id, app_id_size);
 
   if (GNUNET_OK != GNUNET_CONTAINER_multihashmap_put (place_apps, &app_id_hash, app_id_value,
                                                       GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
@@ -964,8 +1216,8 @@ app_place_add (const char *app_id,
  *
  * @param app_id
  *        Application ID.
- * @param msg
- *        Entry message.
+ * @param ereq
+ *        Entry request message.
  */
 static int
 app_place_save (const char *app_id,
@@ -976,26 +1228,14 @@ app_place_save (const char *app_id,
   if (NULL == dir_places)
     return GNUNET_SYSERR;
 
-  struct GNUNET_HashCode ego_pub_hash;
-  struct GNUNET_HashCode place_pub_hash;
-  GNUNET_CRYPTO_hash (&ereq->ego_pub_key, sizeof (ereq->ego_pub_key),
-                      &ego_pub_hash);
-  GNUNET_CRYPTO_hash (&ereq->place_pub_key, sizeof (ereq->place_pub_key),
-                      &place_pub_hash);
-
-  struct GNUNET_CRYPTO_HashAsciiEncoded ego_pub_hash_ascii;
-  struct GNUNET_CRYPTO_HashAsciiEncoded place_pub_hash_ascii;
-  memcpy (&ego_pub_hash_ascii.encoding,
-          GNUNET_h2s_full (&ego_pub_hash), sizeof (ego_pub_hash_ascii));
-  memcpy (&place_pub_hash_ascii.encoding,
-          GNUNET_h2s_full (&place_pub_hash), sizeof (place_pub_hash_ascii));
-
+  char *ego_pub_str = GNUNET_CRYPTO_ecdsa_public_key_to_string (&ereq->ego_pub_key);
+  char *place_pub_str = GNUNET_CRYPTO_eddsa_public_key_to_string (&ereq->place_pub_key);
   char *filename = NULL;
   GNUNET_asprintf (&filename, "%s%c" "%s%c" "%s%c" "%s",
                    dir_social, DIR_SEPARATOR,
                    "places", DIR_SEPARATOR,
-                   ego_pub_hash_ascii.encoding, DIR_SEPARATOR,
-                   place_pub_hash_ascii.encoding);
+                   ego_pub_str, DIR_SEPARATOR,
+                   place_pub_str);
   int ret = GNUNET_DISK_directory_create_for_file (filename);
   if (GNUNET_OK != ret
       || 0 > GNUNET_DISK_fn_write (filename, ereq, ntohs (ereq->header.size),
@@ -1013,8 +1253,8 @@ app_place_save (const char *app_id,
                      dir_social, DIR_SEPARATOR,
                      "apps", DIR_SEPARATOR,
                      app_id, DIR_SEPARATOR,
-                     ego_pub_hash_ascii.encoding, DIR_SEPARATOR,
-                     place_pub_hash_ascii.encoding);
+                     ego_pub_str, DIR_SEPARATOR,
+                     place_pub_str);
     ret = GNUNET_DISK_directory_create_for_file (filename);
     if (GNUNET_OK != ret
         || 0 > GNUNET_DISK_fn_write (filename, "", 0,
@@ -1026,28 +1266,34 @@ app_place_save (const char *app_id,
     }
     GNUNET_free (filename);
   }
+  GNUNET_free (ego_pub_str);
+  GNUNET_free (place_pub_str);
   return ret;
 }
 
 
 int
 app_place_remove (const char *app_id,
+                  const struct GNUNET_CRYPTO_EcdsaPublicKey *ego_pub_key,
                   const struct GNUNET_CRYPTO_EddsaPublicKey *place_pub_key)
 {
+  struct GNUNET_HashCode ego_pub_hash;
   struct GNUNET_HashCode place_pub_hash;
+  GNUNET_CRYPTO_hash (ego_pub_key, sizeof (*ego_pub_key), &ego_pub_hash);
   GNUNET_CRYPTO_hash (place_pub_key, sizeof (*place_pub_key), &place_pub_hash);
 
-  struct GNUNET_CRYPTO_HashAsciiEncoded place_pub_hash_ascii;
-  memcpy (&place_pub_hash_ascii.encoding,
-          GNUNET_h2s_full (&place_pub_hash), sizeof (place_pub_hash_ascii));
-
+  char *ego_pub_str = GNUNET_CRYPTO_ecdsa_public_key_to_string (ego_pub_key);
+  char *place_pub_str = GNUNET_CRYPTO_eddsa_public_key_to_string (place_pub_key);
   char *app_place_filename = NULL;
   GNUNET_asprintf (&app_place_filename,
-                   "%s%c" "%s%/",
+                   "%s%c" "%s%c" "%s%c" "%s%c" "%s",
                    dir_social, DIR_SEPARATOR,
                    "apps", DIR_SEPARATOR,
                    app_id, DIR_SEPARATOR,
-                   place_pub_hash_ascii.encoding);
+                   ego_pub_str, DIR_SEPARATOR,
+                   place_pub_str);
+  GNUNET_free (ego_pub_str);
+  GNUNET_free (place_pub_str);
 
   struct GNUNET_HashCode app_id_hash;
   GNUNET_CRYPTO_hash (app_id, strlen (app_id) + 1, &app_id_hash);
@@ -1065,31 +1311,32 @@ app_place_remove (const char *app_id,
     void *app_id_value = GNUNET_CONTAINER_multihashmap_get (place_apps, &app_id_hash);
     if (NULL != app_id_value)
     {
+      GNUNET_CONTAINER_multihashmap_remove (place_apps, &app_id_hash, app_id_value);
       GNUNET_free (app_id_value);
-      GNUNET_CONTAINER_multihashmap_remove_all (place_apps, &app_id_hash);
     }
   }
 
+  int ret = GNUNET_OK;
 
-  int ret = unlink (app_place_filename);
-  GNUNET_free (app_place_filename);
-  if (0 != ret)
+  if (0 != unlink (app_place_filename))
   {
     GNUNET_break (0);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Error removing app place: unlink returned %d\n", errno);
-    return GNUNET_SYSERR;
+                "Error removing app place file: %s: %s (%d)\n",
+                app_place_filename, strerror (errno), errno);
+    ret = GNUNET_SYSERR;
   }
+  GNUNET_free (app_place_filename);
 
-  return GNUNET_OK;
+  return ret;
 }
 
 
 /**
  * Enter place as host.
  *
- * @param req
- *        Entry request.
+ * @param hreq
+ *        Host entry request.
  * @param[out] ret_hst
  *        Returned Host struct.
  *
@@ -1112,26 +1359,155 @@ host_enter (const struct HostEnterRequest *hreq, struct Host **ret_hst)
     hst = GNUNET_new (struct Host);
     hst->policy = hreq->policy;
     hst->join_reqs = GNUNET_CONTAINER_multihashmap_create (1, GNUNET_NO);
+    hst->relay_msgs = GNUNET_CONTAINER_multihashmap_create (1, GNUNET_NO);
+
+    struct Place *plc = &hst->place;
+    place_init (plc);
+    plc->is_host = GNUNET_YES;
+    plc->pub_key = hreq->place_pub_key;
+    plc->pub_key_hash = place_pub_hash;
+
+    GNUNET_CONTAINER_multihashmap_put (hosts, &plc->pub_key_hash, plc,
+                                       GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+    hst->master = GNUNET_PSYC_master_start (cfg, &hreq->place_key, hst->policy,
+                                            &psyc_master_started,
+                                            &psyc_recv_join_request,
+                                            &psyc_recv_message, NULL, hst);
+    plc->channel = GNUNET_PSYC_master_get_channel (hst->master);
+    ret = GNUNET_YES;
+  }
+
+  if (NULL != ret_hst)
+    *ret_hst = hst;
+  return ret;
+}
+
+
+static int
+msg_proc_parse (const struct MsgProcRequest *mpreq,
+                uint32_t *flags,
+                const char **method_prefix,
+                struct GNUNET_HashCode *method_hash)
+{
+  uint8_t method_size = ntohs (mpreq->header.size) - sizeof (*mpreq);
+  uint16_t offset = GNUNET_STRINGS_buffer_tokenize ((const char *) &mpreq[1],
+                                                    method_size, 1, method_prefix);
+
+  if (0 == offset || offset != method_size || *method_prefix == NULL)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "offset = %u, method_size = %u, method_name = %s\n",
+                offset, method_size, *method_prefix);
+    return GNUNET_SYSERR;
+  }
+
+  GNUNET_CRYPTO_hash (*method_prefix, method_size, method_hash);
+  *flags = ntohl (mpreq->flags);
+  return GNUNET_OK;
+}
+
+
+static int
+check_client_msg_proc_set (void *cls,
+                           const struct MsgProcRequest *mpreq)
+{
+  return GNUNET_OK;
+}
+
+
+/**
+ * Handle a client setting message proccesing flags for a method prefix.
+ */
+static void
+handle_client_msg_proc_set (void *cls,
+                            const struct MsgProcRequest *mpreq)
+{
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
+  struct Place *plc = c->place;
+  if (NULL == plc)
+  {
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (client);
+    return;
+  }
+
+  const char *method_prefix = NULL;
+  uint32_t flags = 0;
+  struct GNUNET_HashCode method_hash;
+
+  if (GNUNET_OK !=
+      msg_proc_parse (mpreq, &flags, &method_prefix, &method_hash))
+  {
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (client);
+    return;
+  }
+#if 0
+  GNUNET_PSYC_slicer_method_remove (plc->slicer, method_prefix,
+                                    place_recv_relay_method,
+                                    place_recv_relay_modifier,
+                                    place_recv_relay_data,
+                                    place_recv_relay_eom);
+  GNUNET_PSYC_slicer_method_remove (plc->slicer, method_prefix,
+                                    place_recv_save_method,
+                                    NULL,
+                                    place_recv_save_data,
+                                    place_recv_save_eom);
+#endif
+  if (flags & GNUNET_SOCIAL_MSG_PROC_RELAY)
+  {
+    GNUNET_PSYC_slicer_method_add (plc->slicer, method_prefix, NULL,
+                                   place_recv_relay_method,
+                                   place_recv_relay_modifier,
+                                   place_recv_relay_data,
+                                   place_recv_relay_eom,
+                                   plc);
+  }
+  if (flags & GNUNET_SOCIAL_MSG_PROC_SAVE)
+  {
+    GNUNET_PSYC_slicer_method_add (plc->slicer, method_prefix, NULL,
+                                   place_recv_save_method,
+                                   NULL,
+                                   place_recv_save_data,
+                                   place_recv_save_eom,
+                                   plc);
+  }
+
+  /** @todo Save flags to be able to resume relaying/saving after restart */
 
-    struct Place *plc = &hst->plc;
-    place_init (plc);
-    plc->is_host = GNUNET_YES;
-    plc->pub_key = hreq->place_pub_key;
-    plc->pub_key_hash = place_pub_hash;
+  GNUNET_SERVICE_client_continue (client);
+}
 
-    GNUNET_CONTAINER_multihashmap_put (hosts, &plc->pub_key_hash, plc,
-                                       GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
-    hst->master = GNUNET_PSYC_master_start (cfg, &hreq->place_key, hst->policy,
-                                            &psyc_master_started,
-                                            &psyc_recv_join_request,
-                                            &psyc_recv_message, NULL, hst);
-    hst->plc.channel = GNUNET_PSYC_master_get_channel (hst->master);
-    ret = GNUNET_YES;
+
+/**
+ * Handle a connecting client requesting to clear all relay rules.
+ */
+static void
+handle_client_msg_proc_clear (void *cls,
+                              const struct GNUNET_MessageHeader *msg)
+{
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
+  struct Place *plc = c->place;
+  if (NULL == plc)
+  {
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (client);
+    return;
   }
 
-  if (NULL != ret_hst)
-    *ret_hst = hst;
-  return ret;
+  GNUNET_PSYC_slicer_clear (plc->slicer);
+
+  GNUNET_SERVICE_client_continue (client);
+}
+
+
+static int
+check_client_host_enter (void *cls,
+                         const struct HostEnterRequest *hr)
+{
+  return GNUNET_OK;
 }
 
 
@@ -1139,11 +1515,14 @@ host_enter (const struct HostEnterRequest *hreq, struct Host **ret_hst)
  * Handle a connecting client entering a place as host.
  */
 static void
-client_recv_host_enter (void *cls, struct GNUNET_SERVER_Client *client,
-                        const struct GNUNET_MessageHeader *msg)
+handle_client_host_enter (void *cls,
+                          const struct HostEnterRequest *hr)
 {
-  struct HostEnterRequest *hreq
-    = (struct HostEnterRequest *) GNUNET_copy_message (msg);
+   struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
+
+  struct HostEnterRequest *
+    hreq = (struct HostEnterRequest *) GNUNET_copy_message (&hr->header);
 
   uint8_t app_id_size = ntohs (hreq->header.size) - sizeof (*hreq);
   const char *app_id = NULL;
@@ -1155,7 +1534,7 @@ client_recv_host_enter (void *cls, struct GNUNET_SERVER_Client *client,
                 "offset = %u, app_id_size = %u, app_id = %s\n",
                 offset, app_id_size, app_id);
     GNUNET_break (0);
-    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    GNUNET_SERVICE_client_drop (client);
     return;
   }
 
@@ -1181,12 +1560,14 @@ client_recv_host_enter (void *cls, struct GNUNET_SERVER_Client *client,
   switch (host_enter (hreq, &hst))
   {
   case GNUNET_YES:
-    plc = &hst->plc;
+    plc = c->place = &hst->place;
+    plc->host = hst;
     break;
 
   case GNUNET_NO:
   {
-    plc = &hst->plc;
+    plc = c->place = &hst->place;
+    plc->host = hst;
     client_send_host_enter_ack (client, hst, GNUNET_OK);
     break;
   }
@@ -1204,23 +1585,24 @@ client_recv_host_enter (void *cls, struct GNUNET_SERVER_Client *client,
     struct ClientListItem *cli = GNUNET_new (struct ClientListItem);
     cli->client = client;
     GNUNET_CONTAINER_DLL_insert (plc->clients_head, plc->clients_tail, cli);
-
-    struct Client *ctx = GNUNET_new (struct Client);
-    ctx->plc = plc;
-    GNUNET_SERVER_client_set_user_context (client, ctx);
+    c->place = plc;
   }
 
   GNUNET_CRYPTO_eddsa_key_clear (&hreq->place_key);
   GNUNET_free (hreq);
-  GNUNET_SERVER_receive_done (client, ret);
+
+  if (GNUNET_OK == ret)
+    GNUNET_SERVICE_client_continue (client);
+  else
+    GNUNET_SERVICE_client_drop (client);
 }
 
 
 /**
  * Enter place as guest.
  *
- * @param req
- *        Entry request.
+ * @param greq
+ *        Guest entry request.
  * @param[out] ret_gst
  *        Returned Guest struct.
  *
@@ -1267,6 +1649,7 @@ guest_enter (const struct GuestEnterRequest *greq, struct Guest **ret_gst)
     len = strnlen (app_id, remaining);
     if (len == remaining)
     {
+      GNUNET_free (gst);
       GNUNET_break (0);
       return GNUNET_SYSERR;
     }
@@ -1277,6 +1660,7 @@ guest_enter (const struct GuestEnterRequest *greq, struct Guest **ret_gst)
     uint16_t relay_size = gst->relay_count * sizeof (*relays);
     if (remaining < relay_size)
     {
+      GNUNET_free (gst);
       GNUNET_break (0);
       return GNUNET_SYSERR;
     }
@@ -1298,21 +1682,21 @@ guest_enter (const struct GuestEnterRequest *greq, struct Guest **ret_gst)
     if (0 != remaining)
     {
       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                  "%u + %u + %u != %u\n",
+                  "%zu + %u + %u != %u\n",
                   sizeof (*greq), relay_size, join_msg_size, greq_size);
-      GNUNET_break (0);
       GNUNET_free (gst);
+      GNUNET_break (0);
       return GNUNET_SYSERR;
     }
     if (0 < relay_size)
     {
       gst->relays = GNUNET_malloc (relay_size);
-      memcpy (gst->relays, relays, relay_size);
+      GNUNET_memcpy (gst->relays, relays, relay_size);
     }
 
     gst->join_flags = ntohl (greq->flags);
 
-    struct Place *plc = &gst->plc;
+    struct Place *plc = &gst->place;
     place_init (plc);
     plc->is_host = GNUNET_NO;
     plc->pub_key = greq->place_pub_key;
@@ -1339,7 +1723,7 @@ guest_enter (const struct GuestEnterRequest *greq, struct Guest **ret_gst)
                                 &psyc_slave_connected,
                                 &psyc_recv_join_dcsn,
                                 gst, join_msg);
-    gst->plc.channel = GNUNET_PSYC_slave_get_channel (gst->slave);
+    plc->channel = GNUNET_PSYC_slave_get_channel (gst->slave);
     ret = GNUNET_YES;
   }
 
@@ -1349,15 +1733,23 @@ guest_enter (const struct GuestEnterRequest *greq, struct Guest **ret_gst)
 }
 
 
+static int
+check_client_guest_enter (void *cls,
+                          const struct GuestEnterRequest *greq)
+{
+  return GNUNET_OK;
+}
+
+
 /**
  * Handle a connecting client entering a place as guest.
  */
 static void
-client_recv_guest_enter (void *cls, struct GNUNET_SERVER_Client *client,
-                         const struct GNUNET_MessageHeader *msg)
+handle_client_guest_enter (void *cls,
+                           const struct GuestEnterRequest *greq)
 {
-  const struct GuestEnterRequest *
-    greq = (const struct GuestEnterRequest *) msg;
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
 
   uint16_t remaining = ntohs (greq->header.size) - sizeof (*greq);
   const char *app_id = NULL;
@@ -1366,7 +1758,7 @@ client_recv_guest_enter (void *cls, struct GNUNET_SERVER_Client *client,
   if (0 == offset)
   {
     GNUNET_break (0);
-    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    GNUNET_SERVICE_client_drop (client);
     return;
   }
 
@@ -1376,13 +1768,15 @@ client_recv_guest_enter (void *cls, struct GNUNET_SERVER_Client *client,
   switch (guest_enter (greq, &gst))
   {
   case GNUNET_YES:
-    plc = &gst->plc;
+    plc = c->place = &gst->place;
+    plc->guest = gst;
     app_place_save (app_id, (const struct PlaceEnterRequest *) greq);
     break;
 
   case GNUNET_NO:
   {
-    plc = &gst->plc;
+    plc = c->place = &gst->place;
+    plc->guest = gst;
 
     struct GNUNET_PSYC_CountersResultMessage res;
     res.header.type = htons (GNUNET_MESSAGE_TYPE_SOCIAL_GUEST_ENTER_ACK);
@@ -1398,7 +1792,7 @@ client_recv_guest_enter (void *cls, struct GNUNET_SERVER_Client *client,
   }
   case GNUNET_SYSERR:
     GNUNET_break (0);
-    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    GNUNET_SERVICE_client_drop (client);
     return;
   }
 
@@ -1410,16 +1804,14 @@ client_recv_guest_enter (void *cls, struct GNUNET_SERVER_Client *client,
   cli->client = client;
   GNUNET_CONTAINER_DLL_insert (plc->clients_head, plc->clients_tail, cli);
 
-  struct Client *ctx = GNUNET_new (struct Client);
-  ctx->plc = plc;
-  GNUNET_SERVER_client_set_user_context (client, ctx);
-  GNUNET_SERVER_receive_done (client, GNUNET_OK);
+  c->place = plc;
+  GNUNET_SERVICE_client_continue (client);
 }
 
 
 struct GuestEnterByNameClosure
 {
-  struct GNUNET_SERVER_Client *client;
+  struct Client *client;
   char *app_id;
   char *password;
   struct GNUNET_CRYPTO_EcdsaPublicKey ego_pub_key;
@@ -1437,8 +1829,10 @@ gns_result_guest_enter (void *cls, uint32_t rd_count,
                         const struct GNUNET_GNSRECORD_Data *rd)
 {
   struct GuestEnterByNameClosure *gcls = cls;
+  struct Client *c = gcls->client;
   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-              "%p GNS result: %u records.\n", gcls->client, rd_count);
+              "%p GNS result: %u records.\n",
+              c, rd_count);
 
   const struct GNUNET_GNSRECORD_PlaceData *
     rec = (const struct GNUNET_GNSRECORD_PlaceData *) rd->data;
@@ -1446,7 +1840,7 @@ gns_result_guest_enter (void *cls, uint32_t rd_count,
   if (0 == rd_count || rd->data_size < sizeof (*rec))
   {
     GNUNET_break (0);
-    GNUNET_SERVER_receive_done (gcls->client, GNUNET_SYSERR);
+    GNUNET_SERVICE_client_drop (c->client);
     return;
   }
 
@@ -1482,13 +1876,13 @@ gns_result_guest_enter (void *cls, uint32_t rd_count,
   greq->relay_count = rec->relay_count;
 
   void *p = &greq[1];
-  memcpy (p, gcls->app_id, app_id_size);
+  GNUNET_memcpy (p, gcls->app_id, app_id_size);
   p += app_id_size;
-  memcpy (p, relays, relay_size);
+  GNUNET_memcpy (p, relays, relay_size);
   p += relay_size;
-  memcpy (p, gcls->join_msg, join_msg_size);
+  GNUNET_memcpy (p, gcls->join_msg, join_msg_size);
 
-  client_recv_guest_enter (NULL, gcls->client, &greq->header);
+  handle_client_guest_enter (c, greq);
 
   GNUNET_free (gcls->app_id);
   if (NULL != gcls->password)
@@ -1500,20 +1894,28 @@ gns_result_guest_enter (void *cls, uint32_t rd_count,
 }
 
 
+static int
+check_client_guest_enter_by_name (void *cls,
+                                  const struct GuestEnterByNameRequest *greq)
+{
+  return GNUNET_OK;
+}
+
+
 /**
  * Handle a connecting client entering a place as guest using a GNS address.
  *
  * Look up GNS address and generate a GuestEnterRequest from that.
  */
 static void
-client_recv_guest_enter_by_name (void *cls, struct GNUNET_SERVER_Client *client,
-                                 const struct GNUNET_MessageHeader *msg)
+handle_client_guest_enter_by_name (void *cls,
+                                   const struct GuestEnterByNameRequest *greq)
 {
-  const struct GuestEnterByNameRequest *
-    greq = (const struct GuestEnterByNameRequest *) msg;
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
 
   struct GuestEnterByNameClosure *gcls = GNUNET_malloc (sizeof (*gcls));
-  gcls->client = client;
+  gcls->client = c;
   gcls->ego_pub_key = greq->ego_pub_key;
 
   const char *p = (const char *) &greq[1];
@@ -1536,20 +1938,21 @@ client_recv_guest_enter_by_name (void *cls, struct GNUNET_SERVER_Client *client,
   {
     if (NULL != gcls->join_msg)
       GNUNET_free (gcls->join_msg);
+    GNUNET_free (gcls);
     GNUNET_break (0);
-    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    GNUNET_SERVICE_client_drop (client);
     return;
   }
 
   uint16_t app_id_size = strlen (app_id) + 1;
   gcls->app_id = GNUNET_malloc (app_id_size);
-  memcpy (gcls->app_id, app_id, app_id_size);
+  GNUNET_memcpy (gcls->app_id, app_id, app_id_size);
 
   uint16_t password_size = strlen (password);
   if (0 < password_size++)
   {
     gcls->password = GNUNET_malloc (password_size);
-    memcpy (gcls->password, password, password_size);
+    GNUNET_memcpy (gcls->password, password, password_size);
   }
 
   GNUNET_GNS_lookup (gns, gns_name, &greq->ego_pub_key,
@@ -1560,7 +1963,7 @@ client_recv_guest_enter_by_name (void *cls, struct GNUNET_SERVER_Client *client,
 
 void
 app_notify_place (struct GNUNET_MessageHeader *msg,
-                  struct GNUNET_SERVER_Client *client)
+                  struct GNUNET_SERVICE_Client *client)
 {
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "%p Sending place notification of type %u to client.\n",
@@ -1602,7 +2005,22 @@ app_notify_place (struct GNUNET_MessageHeader *msg,
 
 
 void
-app_notify_ego (struct Ego *ego, struct GNUNET_SERVER_Client *client)
+app_notify_place_end (struct GNUNET_SERVICE_Client *client)
+{
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "%p Sending end of place list notification to client\n",
+              client);
+
+  struct GNUNET_MessageHeader msg;
+  msg.type = htons (GNUNET_MESSAGE_TYPE_SOCIAL_APP_PLACE_END);
+  msg.size = htons (sizeof (msg));
+
+  client_send_msg (client, &msg);
+}
+
+
+void
+app_notify_ego (struct Ego *ego, struct GNUNET_SERVICE_Client *client)
 {
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "%p Sending ego notification to client: %s\n",
@@ -1614,13 +2032,28 @@ app_notify_ego (struct Ego *ego, struct GNUNET_SERVER_Client *client)
   emsg->header.size = htons (sizeof (*emsg) + name_size);
 
   GNUNET_CRYPTO_ecdsa_key_get_public (&ego->key, &emsg->ego_pub_key);
-  memcpy (&emsg[1], ego->name, name_size);
+  GNUNET_memcpy (&emsg[1], ego->name, name_size);
 
   client_send_msg (client, &emsg->header);
   GNUNET_free (emsg);
 }
 
 
+void
+app_notify_ego_end (struct GNUNET_SERVICE_Client *client)
+{
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "%p Sending end of ego list notification to client\n",
+              client);
+
+  struct GNUNET_MessageHeader msg;
+  msg.type = htons (GNUNET_MESSAGE_TYPE_SOCIAL_APP_EGO_END);
+  msg.size = htons (sizeof (msg));
+
+  client_send_msg (client, &msg);
+}
+
+
 int
 app_place_entry_notify (void *cls, const struct GNUNET_HashCode *key, void *value)
 {
@@ -1640,15 +2073,23 @@ ego_entry (void *cls, const struct GNUNET_HashCode *key, void *value)
 }
 
 
+static int
+check_client_app_connect (void *cls,
+                          const struct AppConnectRequest *creq)
+{
+  return GNUNET_OK;
+}
+
+
 /**
  * Handle application connection.
  */
 static void
-client_recv_app_connect (void *cls, struct GNUNET_SERVER_Client *client,
-                         const struct GNUNET_MessageHeader *msg)
+handle_client_app_connect (void *cls,
+                           const struct AppConnectRequest *creq)
 {
-  const struct AppConnectRequest *creq
-    = (const struct AppConnectRequest *) msg;
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
 
   uint8_t app_id_size = ntohs (creq->header.size) - sizeof (*creq);
   const char *app_id = NULL;
@@ -1657,7 +2098,7 @@ client_recv_app_connect (void *cls, struct GNUNET_SERVER_Client *client,
   if (0 == offset || offset != app_id_size)
   {
     GNUNET_break (0);
-    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    GNUNET_SERVICE_client_drop (client);
     return;
   }
 
@@ -1665,11 +2106,13 @@ client_recv_app_connect (void *cls, struct GNUNET_SERVER_Client *client,
   GNUNET_CRYPTO_hash (app_id, app_id_size, &app_id_hash);
 
   GNUNET_CONTAINER_multihashmap_iterate (egos, ego_entry, client);
+  app_notify_ego_end (client);
 
   struct GNUNET_CONTAINER_MultiHashMap *
     app_places = GNUNET_CONTAINER_multihashmap_get (apps_places, &app_id_hash);
   if (NULL != app_places)
     GNUNET_CONTAINER_multihashmap_iterate (app_places, app_place_entry_notify, client);
+  app_notify_place_end (client);
 
   struct ClientListItem *cli = GNUNET_new (struct ClientListItem);
   cli->client = client;
@@ -1685,12 +2128,10 @@ client_recv_app_connect (void *cls, struct GNUNET_SERVER_Client *client,
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "%p Application %s connected.\n", app, app_id);
 
-  struct Client *ctx = GNUNET_new (struct Client);
-  ctx->app_id = GNUNET_malloc (app_id_size);
-  memcpy (ctx->app_id, app_id, app_id_size);
+  c->app_id = GNUNET_malloc (app_id_size);
+  GNUNET_memcpy (c->app_id, app_id, app_id_size);
 
-  GNUNET_SERVER_client_set_user_context (client, ctx);
-  GNUNET_SERVER_receive_done (client, GNUNET_OK);
+  GNUNET_SERVICE_client_continue (client);
 }
 
 
@@ -1698,42 +2139,45 @@ client_recv_app_connect (void *cls, struct GNUNET_SERVER_Client *client,
  * Handle application detach request.
  */
 static void
-client_recv_app_detach (void *cls, struct GNUNET_SERVER_Client *client,
-                         const struct GNUNET_MessageHeader *msg)
+handle_client_app_detach (void *cls,
+                          const struct AppDetachRequest *req)
 {
-  struct Client *
-    ctx = GNUNET_SERVER_client_get_user_context (client, struct Client);
-  GNUNET_assert (NULL != ctx);
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
 
-  const struct AppDetachRequest *req
-    = (const struct AppDetachRequest *) msg;
-
-  int ret = app_place_remove (ctx->app_id, &req->place_pub_key);
+  int ret = app_place_remove (c->app_id, &req->ego_pub_key, &req->place_pub_key);
   client_send_result (client, req->op_id, ret, NULL, 0);
 
-  GNUNET_SERVER_receive_done (client, GNUNET_OK);
+  GNUNET_SERVICE_client_continue (client);
 }
 
 
 int
 app_places_entry_remove (void *cls, const struct GNUNET_HashCode *key, void *value)
 {
-  app_place_remove (value, cls);
+  struct Place *plc = cls;
+  const char *app_id = value;
+  app_place_remove (app_id, &plc->ego_pub_key, &plc->pub_key);
   return GNUNET_YES;
 }
 
 
 /**
- * Handle application detach request.
+ * Handle application leave request.
  */
 static void
-client_recv_place_leave (void *cls, struct GNUNET_SERVER_Client *client,
-                         const struct GNUNET_MessageHeader *msg)
+handle_client_place_leave (void *cls,
+                           const struct GNUNET_MessageHeader *msg)
 {
-  struct Client *
-    ctx = GNUNET_SERVER_client_get_user_context (client, struct Client);
-  GNUNET_assert (NULL != ctx);
-  struct Place *plc = ctx->plc;
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
+  struct Place *plc = c->place;
+  if (NULL == plc)
+  {
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (client);
+    return;
+  }
 
   /* FIXME: remove all app subscriptions and leave this place  */
 
@@ -1741,7 +2185,7 @@ client_recv_place_leave (void *cls, struct GNUNET_SERVER_Client *client,
     place_apps = GNUNET_CONTAINER_multihashmap_get (places_apps, &plc->pub_key_hash);
   if (NULL != place_apps)
   {
-    GNUNET_CONTAINER_multihashmap_iterate (place_apps, app_places_entry_remove, &plc->pub_key);
+    GNUNET_CONTAINER_multihashmap_iterate (place_apps, app_places_entry_remove, plc);
   }
 
   /* FIXME: disconnect from the network, but keep local connection for history access */
@@ -1751,7 +2195,7 @@ client_recv_place_leave (void *cls, struct GNUNET_SERVER_Client *client,
   while (NULL != cli)
   {
     GNUNET_CONTAINER_DLL_remove (plc->clients_head, plc->clients_tail, cli);
-    GNUNET_SERVER_client_disconnect (cli->client);
+    GNUNET_SERVICE_client_drop (cli->client);
     next = cli->next;
     GNUNET_free (cli);
     cli = next;
@@ -1794,44 +2238,55 @@ psyc_send_join_decision (void *cls, const struct GNUNET_HashCode *pub_key_hash,
 }
 
 
+static int
+check_client_join_decision (void *cls,
+                            const struct GNUNET_PSYC_JoinDecisionMessage *dcsn)
+{
+  return GNUNET_OK;
+}
+
+
 /**
  * Handle an entry decision from a host client.
  */
 static void
-client_recv_join_decision (void *cls, struct GNUNET_SERVER_Client *client,
-                           const struct GNUNET_MessageHeader *msg)
+handle_client_join_decision (void *cls,
+                             const struct GNUNET_PSYC_JoinDecisionMessage *dcsn)
 {
-  struct Client *
-    ctx = GNUNET_SERVER_client_get_user_context (client, struct Client);
-  GNUNET_assert (NULL != ctx);
-  struct Place *plc = ctx->plc;
-  GNUNET_assert (GNUNET_YES == plc->is_host);
-  struct Host *hst = (struct Host *) plc;
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
+  struct Place *plc = c->place;
+  if (NULL == plc || GNUNET_YES != plc->is_host)
+  {
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (client);
+    return;
+  }
+  struct Host *hst = plc->host;
 
-  struct GNUNET_PSYC_JoinDecisionMessage *
-    dcsn = (struct GNUNET_PSYC_JoinDecisionMessage *) msg;
   struct JoinDecisionClosure jcls;
   jcls.is_admitted = ntohl (dcsn->is_admitted);
   jcls.msg
-    = (sizeof (*dcsn) + sizeof (*jcls.msg) <= ntohs (msg->size))
+    = (sizeof (*dcsn) + sizeof (*jcls.msg) <= ntohs (dcsn->header.size))
     ? (struct GNUNET_PSYC_Message *) &dcsn[1]
     : NULL;
 
-  struct GNUNET_HashCode slave_key_hash;
-  GNUNET_CRYPTO_hash (&dcsn->slave_key, sizeof (dcsn->slave_key),
-                      &slave_key_hash);
+  struct GNUNET_HashCode slave_pub_hash;
+  GNUNET_CRYPTO_hash (&dcsn->slave_pub_key, sizeof (dcsn->slave_pub_key),
+                      &slave_pub_hash);
 
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "%p Got join decision (%d) from client for place %s..\n",
               hst, jcls.is_admitted, GNUNET_h2s (&plc->pub_key_hash));
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "%p ..and slave %s.\n",
-              hst, GNUNET_h2s (&slave_key_hash));
+              hst, GNUNET_h2s (&slave_pub_hash));
 
-  GNUNET_CONTAINER_multihashmap_get_multiple (hst->join_reqs, &slave_key_hash,
+  GNUNET_CONTAINER_multihashmap_get_multiple (hst->join_reqs, &slave_pub_hash,
                                               &psyc_send_join_decision, &jcls);
-  GNUNET_CONTAINER_multihashmap_remove_all (hst->join_reqs, &slave_key_hash);
-  GNUNET_SERVER_receive_done (client, GNUNET_OK);
+  GNUNET_CONTAINER_multihashmap_remove_all (hst->join_reqs, &slave_pub_hash);
+
+  GNUNET_SERVICE_client_continue (client);
 }
 
 
@@ -1843,7 +2298,7 @@ client_recv_join_decision (void *cls, struct GNUNET_SERVER_Client *client,
  * @param plc The place struct for the client.
  */
 static void
-send_message_ack (struct Place *plc, struct GNUNET_SERVER_Client *client)
+send_message_ack (struct Place *plc, struct GNUNET_SERVICE_Client *client)
 {
   struct GNUNET_MessageHeader res;
   res.size = htons (sizeof (res));
@@ -1955,7 +2410,7 @@ psyc_transmit_notify_data (void *cls, uint16_t *data_size, void *data)
                 plc, pdata_size);
 
     *data_size = pdata_size;
-    memcpy (data, &pmsg[1], *data_size);
+    GNUNET_memcpy (data, &pmsg[1], *data_size);
     ret = GNUNET_NO;
     break;
 
@@ -1981,8 +2436,8 @@ psyc_transmit_notify_data (void *cls, uint16_t *data_size, void *data)
     *data_size = 0;
     tmit_msg = psyc_transmit_queue_next_msg (plc, tmit_msg);
     plc->is_disconnected = GNUNET_YES;
-    GNUNET_SERVER_client_disconnect (tmit_frag->client);
-    GNUNET_SCHEDULER_add_now (&schedule_cleanup_place, plc);
+    GNUNET_SERVICE_client_drop (tmit_frag->client);
+    GNUNET_SCHEDULER_add_now (&cleanup_place, plc);
     return ret;
   }
   else
@@ -2090,7 +2545,7 @@ psyc_transmit_notify_mod (void *cls, uint16_t *data_size, void *data,
     *full_value_size = ntohl (pmod->value_size);
     *oper = pmod->oper;
     *data_size = mod_size;
-    memcpy (data, &pmod[1], mod_size);
+    GNUNET_memcpy (data, &pmod[1], mod_size);
     ret = GNUNET_NO;
     break;
   }
@@ -2116,7 +2571,7 @@ psyc_transmit_notify_mod (void *cls, uint16_t *data_size, void *data,
                 "%p psyc_transmit_notify_mod: sending %u bytes.\n", plc, mod_size);
 
     *data_size = mod_size;
-    memcpy (data, &pmsg[1], *data_size);
+    GNUNET_memcpy (data, &pmsg[1], *data_size);
     ret = GNUNET_NO;
     break;
   }
@@ -2141,8 +2596,8 @@ psyc_transmit_notify_mod (void *cls, uint16_t *data_size, void *data,
     ret = GNUNET_SYSERR;
     tmit_msg = psyc_transmit_queue_next_msg (plc, tmit_msg);
     plc->is_disconnected = GNUNET_YES;
-    GNUNET_SERVER_client_disconnect (tmit_frag->client);
-    GNUNET_SCHEDULER_add_now (&schedule_cleanup_place, plc);
+    GNUNET_SERVICE_client_drop (tmit_frag->client);
+    GNUNET_SCHEDULER_add_now (&cleanup_place, plc);
   }
   else
   {
@@ -2231,18 +2686,15 @@ guest_transmit_notify_mod (void *cls, uint16_t *data_size, void *data,
 /**
  * Get method part of next message from transmission queue.
  *
- * @param tmit_msg
- *        Next item in message transmission queue.
- * @param[out] pmeth
- *        The message method is returned here.
+ * @param plc
+ *        Place
  *
  * @return #GNUNET_OK on success
  *         #GNUNET_NO if there are no more messages in queue.
  *         #GNUNET_SYSERR if the next message is malformed.
  */
-static int
-psyc_transmit_queue_next_method (struct Place *plc,
-                                 struct GNUNET_PSYC_MessageMethod **pmeth)
+static struct GNUNET_PSYC_MessageMethod *
+psyc_transmit_queue_next_method (struct Place *plc)
 {
   struct MessageTransmitQueue *tmit_msg = plc->tmit_msgs_head;
   if (NULL == tmit_msg)
@@ -2263,25 +2715,28 @@ psyc_transmit_queue_next_method (struct Place *plc,
                 "%p psyc_transmit_queue_next_method: unexpected message part of type %u.\n",
                 plc, NULL != pmsg ? ntohs (pmsg->type) : 0);
     GNUNET_break (0);
-    return GNUNET_SYSERR;
+    return NULL;
   }
 
   uint16_t psize = ntohs (pmsg->size);
-  *pmeth = (struct GNUNET_PSYC_MessageMethod *) pmsg;
-  if (psize < sizeof (**pmeth) + 1 || '\0' != *((char *) *pmeth + psize - 1))
+  struct GNUNET_PSYC_MessageMethod *
+    pmeth = (struct GNUNET_PSYC_MessageMethod *) GNUNET_copy_message (pmsg);
+
+  if (psize < sizeof (*pmeth) + 1 || '\0' != *((char *) pmeth + psize - 1))
   {
     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                 "%p psyc_transmit_queue_next_method: invalid method name.\n",
-                plc, ntohs (pmsg->type));
+                plc);
     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                "%u <= %u || NUL != %u\n",
-                sizeof (**pmeth), psize, *((char *) *pmeth + psize - 1));
+                "%zu <= %u || NUL != %u\n",
+                sizeof (*pmeth), psize, *((char *) pmeth + psize - 1));
     GNUNET_break (0);
-    return GNUNET_SYSERR;
+    GNUNET_free (pmeth);
+    return NULL;
   }
 
   psyc_transmit_queue_next_part (plc, tmit_msg, tmit_frag);
-  return GNUNET_OK;
+  return pmeth;
 }
 
 
@@ -2291,19 +2746,24 @@ psyc_transmit_queue_next_method (struct Place *plc,
 static int
 psyc_master_transmit_message (struct Host *hst)
 {
+  struct Place *plc = &hst->place;
 
   if (NULL == hst->tmit_handle)
   {
-    struct GNUNET_PSYC_MessageMethod *pmeth = NULL;
-    int ret = psyc_transmit_queue_next_method (&hst->plc, &pmeth);
-    if (GNUNET_OK != ret)
-      return ret;
+    struct GNUNET_PSYC_MessageMethod *
+      pmeth = psyc_transmit_queue_next_method (plc);
+    if (NULL == pmeth)
+      return GNUNET_SYSERR;
 
-    hst->tmit_handle
-      = GNUNET_PSYC_master_transmit (hst->master, (const char *) &pmeth[1],
-                                     &host_transmit_notify_mod,
-                                     &host_transmit_notify_data, hst,
-                                     pmeth->flags);
+    hst->tmit_handle = (void *) &hst->tmit_handle;
+    struct GNUNET_PSYC_MasterTransmitHandle *
+      tmit_handle = GNUNET_PSYC_master_transmit (hst->master, (const char *) &pmeth[1],
+                                                 &host_transmit_notify_mod,
+                                                 &host_transmit_notify_data, hst,
+                                                 pmeth->flags);
+    if (NULL != hst->tmit_handle)
+      hst->tmit_handle = tmit_handle;
+    GNUNET_free (pmeth);
   }
   else
   {
@@ -2319,18 +2779,24 @@ psyc_master_transmit_message (struct Host *hst)
 static int
 psyc_slave_transmit_message (struct Guest *gst)
 {
+  struct Place *plc = &gst->place;
+
   if (NULL == gst->tmit_handle)
   {
-    struct GNUNET_PSYC_MessageMethod *pmeth = NULL;
-    int ret = psyc_transmit_queue_next_method (&gst->plc, &pmeth);
-    if (GNUNET_OK != ret)
-      return ret;
+    struct GNUNET_PSYC_MessageMethod *
+      pmeth = psyc_transmit_queue_next_method (plc);
+    if (NULL == pmeth)
+      return GNUNET_SYSERR;
 
-    gst->tmit_handle
-      = GNUNET_PSYC_slave_transmit (gst->slave, (const char *) &pmeth[1],
-                                    &guest_transmit_notify_mod,
-                                    &guest_transmit_notify_data, gst,
-                                    pmeth->flags);
+    gst->tmit_handle = (void *) &gst->tmit_handle;
+    struct GNUNET_PSYC_SlaveTransmitHandle *
+      tmit_handle = GNUNET_PSYC_slave_transmit (gst->slave, (const char *) &pmeth[1],
+                                                 &guest_transmit_notify_mod,
+                                                 &guest_transmit_notify_data, gst,
+                                                 pmeth->flags);
+    if (NULL != gst->tmit_handle)
+      gst->tmit_handle = tmit_handle;
+    GNUNET_free (pmeth);
   }
   else
   {
@@ -2365,7 +2831,7 @@ psyc_transmit_message (struct Place *plc)
  */
 static struct MessageTransmitQueue *
 psyc_transmit_queue_message (struct Place *plc,
-                             struct GNUNET_SERVER_Client *client,
+                             struct GNUNET_SERVICE_Client *client,
                              size_t data_size,
                              const void *data,
                              uint16_t first_ptype, uint16_t last_ptype,
@@ -2383,7 +2849,7 @@ psyc_transmit_queue_message (struct Place *plc,
 
   struct FragmentTransmitQueue *
     tmit_frag = GNUNET_malloc (sizeof (*tmit_frag) + data_size);
-  memcpy (&tmit_frag[1], data, data_size);
+  GNUNET_memcpy (&tmit_frag[1], data, data_size);
   tmit_frag->next_part = (struct GNUNET_MessageHeader *) &tmit_frag[1];
   tmit_frag->client = client;
   tmit_frag->size = data_size;
@@ -2401,7 +2867,7 @@ psyc_transmit_queue_message (struct Place *plc,
  * @param client  Client the message originates from.
  */
 static void
-psyc_transmit_cancel (struct Place *plc, struct GNUNET_SERVER_Client *client)
+psyc_transmit_cancel (struct Place *plc, struct GNUNET_SERVICE_Client *client)
 {
   uint16_t type = GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_CANCEL;
 
@@ -2416,17 +2882,31 @@ psyc_transmit_cancel (struct Place *plc, struct GNUNET_SERVER_Client *client)
 }
 
 
+static int
+check_client_psyc_message (void *cls,
+                           const struct GNUNET_MessageHeader *msg)
+{
+  return GNUNET_OK;
+}
+
+
 /**
  * Handle an incoming message from a client, to be transmitted to the place.
  */
 static void
-client_recv_psyc_message (void *cls, struct GNUNET_SERVER_Client *client,
-                          const struct GNUNET_MessageHeader *msg)
+handle_client_psyc_message (void *cls,
+                            const struct GNUNET_MessageHeader *msg)
 {
-  struct Client *
-    ctx = GNUNET_SERVER_client_get_user_context (client, struct Client);
-  GNUNET_assert (NULL != ctx);
-  struct Place *plc = ctx->plc;
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
+  struct Place *plc = c->place;
+  if (NULL == plc)
+  {
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (client);
+    return;
+  }
+
   int ret = GNUNET_SYSERR;
 
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
@@ -2438,7 +2918,7 @@ client_recv_psyc_message (void *cls, struct GNUNET_SERVER_Client *client,
     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                 "%p Place is not ready yet, disconnecting client.\n", plc);
     GNUNET_break (0);
-    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    GNUNET_SERVICE_client_drop (client);
     return;
   }
 
@@ -2452,7 +2932,7 @@ client_recv_psyc_message (void *cls, struct GNUNET_SERVER_Client *client,
                 plc, psize);
     GNUNET_break (0);
     psyc_transmit_cancel (plc, client);
-    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    GNUNET_SERVICE_client_drop (client);
     return;
   }
 
@@ -2465,20 +2945,20 @@ client_recv_psyc_message (void *cls, struct GNUNET_SERVER_Client *client,
                 "%p Received invalid message part from client.\n", plc);
     GNUNET_break (0);
     psyc_transmit_cancel (plc, client);
-    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    GNUNET_SERVICE_client_drop (client);
     return;
   }
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "%p Received message with first part type %u and last part type %u.\n",
               plc, first_ptype, last_ptype);
 
-  ctx->tmit_msg
+  c->tmit_msg
     = psyc_transmit_queue_message (plc, client, psize, &msg[1],
-                                   first_ptype, last_ptype, ctx->tmit_msg);
-  if (NULL != ctx->tmit_msg)
+                                   first_ptype, last_ptype, c->tmit_msg);
+  if (NULL != c->tmit_msg)
   {
     if (GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_END <= last_ptype)
-      ctx->tmit_msg = NULL;
+      c->tmit_msg = NULL;
     ret = psyc_transmit_message (plc);
   }
 
@@ -2490,7 +2970,11 @@ client_recv_psyc_message (void *cls, struct GNUNET_SERVER_Client *client,
     psyc_transmit_cancel (plc, client);
     ret = GNUNET_SYSERR;
   }
-  GNUNET_SERVER_receive_done (client, ret);
+
+  if (GNUNET_OK == ret)
+    GNUNET_SERVICE_client_continue (client);
+  else
+    GNUNET_SERVICE_client_drop (client);
 }
 
 
@@ -2498,15 +2982,15 @@ client_recv_psyc_message (void *cls, struct GNUNET_SERVER_Client *client,
  * A historic message arrived from PSYC.
  */
 static void
-psyc_recv_history_message (void *cls, uint64_t message_id, uint32_t flags,
-                           const struct GNUNET_PSYC_MessageHeader *msg)
+psyc_recv_history_message (void *cls, const struct GNUNET_PSYC_MessageHeader *msg)
 {
   struct OperationClosure *opcls = cls;
-  struct Place *plc = opcls->plc;
+  struct Client *c = opcls->client;
+  struct Place *plc = c->place;
 
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "%p Received historic message #%" PRId64 " (flags: %x)\n",
-              plc, message_id, flags);
+              plc, GNUNET_ntohll (msg->message_id), ntohl (msg->flags));
 
   uint16_t size = ntohs (msg->header.size);
 
@@ -2517,10 +3001,12 @@ psyc_recv_history_message (void *cls, uint64_t message_id, uint32_t flags,
   res->op_id = opcls->op_id;
   res->result_code = GNUNET_htonll (GNUNET_OK);
 
-  memcpy (&res[1], msg, size);
+  GNUNET_memcpy (&res[1], msg, size);
 
   /** @todo FIXME: send only to requesting client */
   place_send_msg (plc, &res->header);
+
+  GNUNET_free (res);
 }
 
 
@@ -2532,13 +3018,25 @@ psyc_recv_history_result (void *cls, int64_t result,
                           const void *err_msg, uint16_t err_msg_size)
 {
   struct OperationClosure *opcls = cls;
+  struct Client *c = opcls->client;
+  struct Place *plc = c->place;
+
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "%p History replay #%" PRIu64 ": "
               "PSYCstore returned %" PRId64 " (%.*s)\n",
-              opcls->plc, GNUNET_ntohll (opcls->op_id), result, err_msg_size, err_msg);
+              plc, GNUNET_ntohll (opcls->op_id), result,
+              err_msg_size, (const char *) err_msg);
 
   // FIXME: place might have been destroyed
-  client_send_result (opcls->client, opcls->op_id, result, err_msg, err_msg_size);
+  client_send_result (c->client, opcls->op_id, result, err_msg, err_msg_size);
+}
+
+
+static int
+check_client_history_replay (void *cls,
+                             const struct GNUNET_PSYC_HistoryRequestMessage *req)
+{
+  return GNUNET_OK;
 }
 
 
@@ -2546,17 +3044,20 @@ psyc_recv_history_result (void *cls, int64_t result,
  * Client requests channel history.
  */
 static void
-client_recv_history_replay (void *cls, struct GNUNET_SERVER_Client *client,
-                            const struct GNUNET_MessageHeader *msg)
+handle_client_history_replay (void *cls,
+                              const struct GNUNET_PSYC_HistoryRequestMessage *req)
 {
-  struct Client *
-    ctx = GNUNET_SERVER_client_get_user_context (client, struct Client);
-  GNUNET_assert (NULL != ctx);
-  struct Place *plc = ctx->plc;
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
+  struct Place *plc = c->place;
+  if (NULL == plc)
+  {
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (client);
+    return;
+  }
 
-  const struct GNUNET_PSYC_HistoryRequestMessage *
-    req = (const struct GNUNET_PSYC_HistoryRequestMessage *) msg;
-  uint16_t size = ntohs (msg->size);
+  uint16_t size = ntohs (req->header.size);
   const char *method_prefix = (const char *) &req[1];
 
   if (size < sizeof (*req) + 1
@@ -2564,16 +3065,15 @@ client_recv_history_replay (void *cls, struct GNUNET_SERVER_Client *client,
   {
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "%p History replay #%" PRIu64 ": "
-                "invalid method prefix. size: %u < %u?\n",
+                "invalid method prefix. size: %u < %zu?\n",
                 plc, GNUNET_ntohll (req->op_id), size, sizeof (*req) + 1);
     GNUNET_break (0);
-    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    GNUNET_SERVICE_client_drop (client);
     return;
   }
 
   struct OperationClosure *opcls = GNUNET_malloc (sizeof (*opcls));
-  opcls->client = client;
-  opcls->plc = plc;
+  opcls->client = c;
   opcls->op_id = req->op_id;
   opcls->flags = ntohl (req->flags);
 
@@ -2582,16 +3082,16 @@ client_recv_history_replay (void *cls, struct GNUNET_SERVER_Client *client,
                                         GNUNET_ntohll (req->start_message_id),
                                         GNUNET_ntohll (req->end_message_id),
                                         method_prefix, opcls->flags,
-                                        &psyc_recv_history_message, NULL,
-                                        &psyc_recv_history_result, opcls);
+                                        psyc_recv_history_message, NULL,
+                                        psyc_recv_history_result, opcls);
   else
     GNUNET_PSYC_channel_history_replay_latest (plc->channel,
                                                GNUNET_ntohll (req->message_limit),
                                                method_prefix, opcls->flags,
-                                               &psyc_recv_history_message, NULL,
-                                               &psyc_recv_history_result, opcls);
+                                               psyc_recv_history_message, NULL,
+                                               psyc_recv_history_result, opcls);
 
-  GNUNET_SERVER_receive_done (client, GNUNET_OK);
+  GNUNET_SERVICE_client_continue (client);
 }
 
 
@@ -2607,7 +3107,8 @@ psyc_recv_state_var (void *cls,
                      uint32_t full_value_size)
 {
   struct OperationClosure *opcls = cls;
-  struct Place *plc = opcls->plc;
+  struct Client *c = opcls->client;
+  struct Place *plc = c->place;
 
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "%p Received state variable %s from PSYC\n",
@@ -2622,10 +3123,12 @@ psyc_recv_state_var (void *cls,
   res->op_id = opcls->op_id;
   res->result_code = GNUNET_htonll (GNUNET_OK);
 
-  memcpy (&res[1], mod, size);
+  GNUNET_memcpy (&res[1], mod, size);
 
   /** @todo FIXME: send only to requesting client */
   place_send_msg (plc, &res->header);
+
+  GNUNET_free (res);
 }
 
 
@@ -2637,13 +3140,25 @@ psyc_recv_state_result (void *cls, int64_t result,
                         const void *err_msg, uint16_t err_msg_size)
 {
   struct OperationClosure *opcls = cls;
+  struct Client *c = opcls->client;
+  struct Place *plc = c->place;
+
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
               "%p State get #%" PRIu64 ": "
               "PSYCstore returned %" PRId64 " (%.*s)\n",
-              opcls->plc, GNUNET_ntohll (opcls->op_id), result, err_msg_size, err_msg);
+              plc, GNUNET_ntohll (opcls->op_id), result,
+              err_msg_size, (const char *) err_msg);
 
   // FIXME: place might have been destroyed
-  client_send_result (opcls->client, opcls->op_id, result, err_msg, err_msg_size);
+  client_send_result (c->client, opcls->op_id, result, err_msg, err_msg_size);
+}
+
+
+static int
+check_client_state_get (void *cls,
+                        const struct GNUNET_PSYC_StateRequestMessage *req)
+{
+  return GNUNET_OK;
 }
 
 
@@ -2651,17 +3166,20 @@ psyc_recv_state_result (void *cls, int64_t result,
  * Client requests channel history.
  */
 static void
-client_recv_state_get (void *cls, struct GNUNET_SERVER_Client *client,
-                       const struct GNUNET_MessageHeader *msg)
+handle_client_state_get (void *cls,
+                         const struct GNUNET_PSYC_StateRequestMessage *req)
 {
-  struct Client *
-    ctx = GNUNET_SERVER_client_get_user_context (client, struct Client);
-  GNUNET_assert (NULL != ctx);
-  struct Place *plc = ctx->plc;
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
+  struct Place *plc = c->place;
+  if (NULL == plc)
+  {
+    GNUNET_break (0);
+    GNUNET_SERVICE_client_drop (client);
+    return;
+  }
 
-  const struct GNUNET_PSYC_StateRequestMessage *
-    req = (const struct GNUNET_PSYC_StateRequestMessage *) msg;
-  uint16_t size = ntohs (msg->size);
+  uint16_t size = ntohs (req->header.size);
   const char *name = (const char *) &req[1];
 
   GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
@@ -2673,19 +3191,18 @@ client_recv_state_get (void *cls, struct GNUNET_SERVER_Client *client,
   {
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "%p State get #%" PRIu64 ": "
-                "invalid name. size: %u < %u?\n",
+                "invalid name. size: %u < %zu?\n",
                 plc, GNUNET_ntohll (req->op_id), size, sizeof (*req) + 1);
     GNUNET_break (0);
-    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    GNUNET_SERVICE_client_drop (client);
     return;
   }
 
   struct OperationClosure *opcls = GNUNET_malloc (sizeof (*opcls));
-  opcls->client = client;
-  opcls->plc = plc;
+  opcls->client = c;
   opcls->op_id = req->op_id;
 
-  switch (ntohs (msg->type))
+  switch (ntohs (req->header.type))
   {
   case GNUNET_MESSAGE_TYPE_PSYC_STATE_GET:
       GNUNET_PSYC_channel_state_get (plc->channel, name,
@@ -2703,18 +3220,33 @@ client_recv_state_get (void *cls, struct GNUNET_SERVER_Client *client,
       GNUNET_assert (0);
   }
 
-  GNUNET_SERVER_receive_done (client, GNUNET_OK);
+  GNUNET_SERVICE_client_continue (client);
 }
 
 
+#define check_client_state_get_prefix check_client_state_get
+#define handle_client_state_get_prefix handle_client_state_get
+
+
 static void
 namestore_recv_records_store_result (void *cls, int32_t result,
                                      const char *err_msg)
 {
-  struct OperationClosure *ocls = cls;
-  client_send_result (ocls->client, ocls->op_id, result, err_msg,
+  struct OperationClosure *opcls = cls;
+  struct Client *c = opcls->client;
+
+  // FIXME: client might have been disconnected
+  client_send_result (c->client, opcls->op_id, result, err_msg,
                       (NULL != err_msg) ? strlen (err_msg) : 0);
-  GNUNET_free (ocls);
+  GNUNET_free (opcls);
+}
+
+
+static int
+check_client_zone_add_place (void *cls,
+                             const struct ZoneAddPlaceRequest *preq)
+{
+  return GNUNET_OK;
 }
 
 
@@ -2722,11 +3254,11 @@ namestore_recv_records_store_result (void *cls, int32_t result,
  * Handle request to add PLACE record to GNS zone.
  */
 static void
-client_recv_zone_add_place (void *cls, struct GNUNET_SERVER_Client *client,
-                             const struct GNUNET_MessageHeader *msg)
+handle_client_zone_add_place (void *cls,
+                              const struct ZoneAddPlaceRequest *preq)
 {
-  const struct ZoneAddPlaceRequest *preq
-    = (const struct ZoneAddPlaceRequest *) msg;
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
 
   uint16_t remaining = ntohs (preq->header.size) - sizeof (*preq);
   const char *p = (const char *) &preq[1];
@@ -2743,7 +3275,7 @@ client_recv_zone_add_place (void *cls, struct GNUNET_SERVER_Client *client,
   {
     GNUNET_break (0);
     client_send_result (client, preq->op_id, GNUNET_SYSERR, NULL, 0);
-    GNUNET_SERVER_receive_done (client, GNUNET_OK);
+    GNUNET_SERVICE_client_drop (client);
     return;
   }
 
@@ -2757,7 +3289,7 @@ client_recv_zone_add_place (void *cls, struct GNUNET_SERVER_Client *client,
   rec->place_pub_key = preq->place_pub_key;
   rec->origin = this_peer;
   rec->relay_count = preq->relay_count;
-  memcpy (&rec[1], relays, relay_size);
+  GNUNET_memcpy (&rec[1], relays, relay_size);
 
   rd.data = rec;
   rd.data_size = sizeof (*rec) + relay_size;
@@ -2771,14 +3303,23 @@ client_recv_zone_add_place (void *cls, struct GNUNET_SERVER_Client *client,
   }
   else
   {
-    struct OperationClosure *ocls = GNUNET_malloc (sizeof (*ocls));
-    ocls->client = client;
-    ocls->op_id = preq->op_id;
+    struct OperationClosure *opcls = GNUNET_malloc (sizeof (*opcls));
+    opcls->client = c;
+    opcls->op_id = preq->op_id;
     GNUNET_NAMESTORE_records_store (namestore, &ego->key,
                                     name, 1, &rd,
-                                    namestore_recv_records_store_result, ocls);
+                                    namestore_recv_records_store_result, opcls);
+    /** @todo refresh stored records later */
   }
-  GNUNET_SERVER_receive_done (client, GNUNET_OK);
+  GNUNET_SERVICE_client_continue (client);
+}
+
+
+static int
+check_client_zone_add_nym (void *cls,
+                           const struct ZoneAddNymRequest *nreq)
+{
+  return GNUNET_OK;
 }
 
 
@@ -2786,11 +3327,11 @@ client_recv_zone_add_place (void *cls, struct GNUNET_SERVER_Client *client,
  * Handle request to add PLACE record to GNS zone.
  */
 static void
-client_recv_zone_add_nym (void *cls, struct GNUNET_SERVER_Client *client,
-                          const struct GNUNET_MessageHeader *msg)
+handle_client_zone_add_nym (void *cls,
+                            const struct ZoneAddNymRequest *nreq)
 {
-  const struct ZoneAddNymRequest *nreq
-    = (const struct ZoneAddNymRequest *) msg;
+  struct Client *c = cls;
+  struct GNUNET_SERVICE_Client *client = c->client;
 
   uint16_t name_size = ntohs (nreq->header.size) - sizeof (*nreq);
   const char *name = NULL;
@@ -2800,7 +3341,7 @@ client_recv_zone_add_nym (void *cls, struct GNUNET_SERVER_Client *client,
   {
     GNUNET_break (0);
     client_send_result (client, nreq->op_id, GNUNET_SYSERR, NULL, 0);
-    GNUNET_SERVER_receive_done (client, GNUNET_OK);
+    GNUNET_SERVICE_client_continue (client);
     return;
   }
 
@@ -2820,61 +3361,18 @@ client_recv_zone_add_nym (void *cls, struct GNUNET_SERVER_Client *client,
   }
   else
   {
-    struct OperationClosure *ocls = GNUNET_malloc (sizeof (*ocls));
-    ocls->client = client;
-    ocls->op_id = nreq->op_id;
+    struct OperationClosure *opcls = GNUNET_malloc (sizeof (*opcls));
+    opcls->client = c;
+    opcls->op_id = nreq->op_id;
     GNUNET_NAMESTORE_records_store (namestore, &ego->key,
-                                      name, 1, &rd,
-                                      namestore_recv_records_store_result, ocls);
+                                    name, 1, &rd,
+                                    namestore_recv_records_store_result, opcls);
+    /** @todo refresh stored records later */
   }
-  GNUNET_SERVER_receive_done (client, GNUNET_OK);
+  GNUNET_SERVICE_client_continue (client);
 }
 
 
-static const struct GNUNET_SERVER_MessageHandler handlers[] = {
-  { &client_recv_host_enter, NULL,
-    GNUNET_MESSAGE_TYPE_SOCIAL_HOST_ENTER, 0 },
-
-  { &client_recv_guest_enter, NULL,
-    GNUNET_MESSAGE_TYPE_SOCIAL_GUEST_ENTER, 0 },
-
-  { &client_recv_guest_enter_by_name, NULL,
-    GNUNET_MESSAGE_TYPE_SOCIAL_GUEST_ENTER_BY_NAME, 0 },
-
-  { &client_recv_join_decision, NULL,
-    GNUNET_MESSAGE_TYPE_PSYC_JOIN_DECISION, 0 },
-
-  { &client_recv_psyc_message, NULL,
-    GNUNET_MESSAGE_TYPE_PSYC_MESSAGE, 0 },
-
-  { &client_recv_history_replay, NULL,
-    GNUNET_MESSAGE_TYPE_PSYC_HISTORY_REPLAY, 0 },
-
-  { &client_recv_state_get, NULL,
-    GNUNET_MESSAGE_TYPE_PSYC_STATE_GET, 0 },
-
-  { &client_recv_state_get, NULL,
-    GNUNET_MESSAGE_TYPE_PSYC_STATE_GET_PREFIX, 0 },
-
-  { &client_recv_zone_add_place, NULL,
-    GNUNET_MESSAGE_TYPE_SOCIAL_ZONE_ADD_PLACE, 0 },
-
-  { &client_recv_zone_add_nym, NULL,
-    GNUNET_MESSAGE_TYPE_SOCIAL_ZONE_ADD_NYM, 0 },
-
-  { &client_recv_app_connect, NULL,
-    GNUNET_MESSAGE_TYPE_SOCIAL_APP_CONNECT, 0 },
-
-  { &client_recv_app_detach, NULL,
-    GNUNET_MESSAGE_TYPE_SOCIAL_APP_DETACH, 0 },
-
-  { &client_recv_place_leave, NULL,
-    GNUNET_MESSAGE_TYPE_SOCIAL_PLACE_LEAVE, 0 },
-
-  { NULL, NULL, 0, 0 }
-};
-
-
 const char *
 path_basename (const char *path)
 {
@@ -2892,110 +3390,109 @@ path_basename (const char *path)
 struct PlaceLoadClosure
 {
   const char *app_id;
-  const char *ego_pub_hash_str;
+  const char *ego_pub_str;
 };
 
 
 /** Load a place file */
 int
-file_place_load (void *cls, const char *filename)
+file_place_load (void *cls, const char *place_filename)
 {
-  char *app_id = cls;
+  struct PlaceLoadClosure *plcls = cls;
+
+  const char *place_pub_str = path_basename (place_filename);
+  if (NULL == place_pub_str)
+  {
+    GNUNET_break (0);
+    return GNUNET_OK;
+  }
+
+  char *filename = NULL;
+  GNUNET_asprintf (&filename, "%s%c" "%s%c" "%s%c" "%s",
+                   dir_social, DIR_SEPARATOR,
+                   "places", DIR_SEPARATOR,
+                   plcls->ego_pub_str, DIR_SEPARATOR,
+                   place_pub_str);
+
   uint64_t file_size = 0;
   if (GNUNET_OK !=
       GNUNET_DISK_file_size (filename, &file_size, GNUNET_YES, GNUNET_YES)
-      || file_size < sizeof (struct HostEnterRequest))
+      || file_size < sizeof (struct PlaceEnterRequest))
+  {
+    GNUNET_free (filename);
     return GNUNET_OK;
+  }
 
   struct PlaceEnterRequest *ereq = GNUNET_malloc (file_size);
   ssize_t read_size = GNUNET_DISK_fn_read (filename, ereq, file_size);
+  GNUNET_free (filename);
   if (read_size < 0 || read_size < sizeof (*ereq))
+  {
+    GNUNET_free (ereq);
     return GNUNET_OK;
+  }
 
   uint16_t ereq_size = ntohs (ereq->header.size);
   if (read_size != ereq_size)
+  {
+    GNUNET_free (ereq);
     return GNUNET_OK;
+  }
 
   switch (ntohs (ereq->header.type))
   {
   case GNUNET_MESSAGE_TYPE_SOCIAL_HOST_ENTER:
     if (ereq_size < sizeof (struct HostEnterRequest))
+    {
+      GNUNET_free (ereq);
       return GNUNET_OK;
+    }
     struct HostEnterRequest *hreq = (struct HostEnterRequest *) ereq;
     host_enter (hreq, NULL);
     break;
 
   case GNUNET_MESSAGE_TYPE_SOCIAL_GUEST_ENTER:
     if (ereq_size < sizeof (struct GuestEnterRequest))
+    {
+      GNUNET_free (ereq);
       return GNUNET_OK;
+    }
     struct GuestEnterRequest *greq = (struct GuestEnterRequest *) ereq;
     guest_enter (greq, NULL);
     break;
 
   default:
+    GNUNET_free (ereq);
     return GNUNET_OK;
   }
 
-  app_place_add (app_id, ereq);
-  return GNUNET_OK;
-}
-
-
-/** Load an ego place file */
-int
-file_ego_place_load (void *cls, const char *place_filename)
-{
-  struct PlaceLoadClosure *plcls = cls;
-
-  const char *place_pub_hash_str = path_basename (place_filename);
-  if (NULL == place_pub_hash_str)
-  {
-    GNUNET_break (0);
-    return GNUNET_OK;
-  }
-
-  char *filename = NULL;
-  GNUNET_asprintf (&filename, "%s%c" "%s%c" "%s%c" "%s",
-                   dir_social, DIR_SEPARATOR,
-                   "places", DIR_SEPARATOR,
-                   plcls->ego_pub_hash_str, DIR_SEPARATOR,
-                   place_pub_hash_str);
-
-  struct PlaceEnterRequest ereq[GNUNET_SERVER_MAX_MESSAGE_SIZE];
-
-  int read_size = GNUNET_DISK_fn_read (filename, &ereq,
-                                       GNUNET_SERVER_MAX_MESSAGE_SIZE);
-  GNUNET_free (filename);
-
-  if (read_size < (ssize_t) sizeof (ereq))
-    return GNUNET_OK;
-
   app_place_add (plcls->app_id, ereq);
+  GNUNET_free (ereq);
   return GNUNET_OK;
 }
 
 
 /**
- * Read @e place_pub_hash_str entries in @a dir_ego
+ * Read @e place_pub_str entries in @a dir_ego
  *
  * @param dir_ego
  *        Data directory of an application ego.
- *        $GNUNET_DATA_HOME/social/apps/$app_id/$ego_pub_hash_str/
+ *        $GNUNET_DATA_HOME/social/apps/$app_id/$ego_pub_str/
  */
 int
 scan_app_ego_dir (void *cls, const char *dir_ego)
 {
   struct PlaceLoadClosure *plcls = cls;
-  plcls->ego_pub_hash_str = path_basename (dir_ego);
+  plcls->ego_pub_str = path_basename (dir_ego);
 
-  if (NULL != plcls->ego_pub_hash_str)
-    GNUNET_DISK_directory_scan (dir_ego, file_ego_place_load, plcls);
+  if (NULL != plcls->ego_pub_str)
+    GNUNET_DISK_directory_scan (dir_ego, file_place_load, plcls);
 
   return GNUNET_OK;
 }
 
 /**
- * Read @e ego_pub_hash_str entries in @a dir_app
+ * Read @e ego_pub_str entries in @a dir_app
  *
  * @param dir_app
  *        Data directory of an application.
@@ -3050,21 +3547,13 @@ identity_recv_ego (void *cls, struct GNUNET_IDENTITY_Ego *id_ego,
     ego->key = *(GNUNET_IDENTITY_ego_get_private_key (id_ego));
     size_t name_size = strlen (name) + 1;
     ego->name = GNUNET_malloc (name_size);
-    memcpy (ego->name, name, name_size);
+    GNUNET_memcpy (ego->name, name, name_size);
 
     GNUNET_CONTAINER_multihashmap_put (egos, &ego_pub_hash, ego,
                                        GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
   }
-}
 
-
-/**
- * Connected to core service.
- */
-static void
-core_connected (void *cls, const struct GNUNET_PeerIdentity *my_identity)
-{
-  this_peer = *my_identity;
+  // FIXME: notify clients about changed ego
 }
 
 
@@ -3076,10 +3565,13 @@ core_connected (void *cls, const struct GNUNET_PeerIdentity *my_identity)
  * @param c Configuration to use.
  */
 static void
-run (void *cls, struct GNUNET_SERVER_Handle *server,
-     const struct GNUNET_CONFIGURATION_Handle *c)
+run (void *cls,
+     const struct GNUNET_CONFIGURATION_Handle *c,
+     struct GNUNET_SERVICE_Handle *svc)
 {
   cfg = c;
+  service = svc;
+  GNUNET_CRYPTO_get_peer_identity (cfg, &this_peer);
 
   hosts = GNUNET_CONTAINER_multihashmap_create (1, GNUNET_YES);
   guests = GNUNET_CONTAINER_multihashmap_create (1, GNUNET_YES);
@@ -3091,8 +3583,6 @@ run (void *cls, struct GNUNET_SERVER_Handle *server,
   apps_places = GNUNET_CONTAINER_multihashmap_create(1, GNUNET_NO);
   places_apps = GNUNET_CONTAINER_multihashmap_create(1, GNUNET_NO);
 
-  core = GNUNET_CORE_connect (cfg, NULL, core_connected, NULL, NULL,
-                              NULL, GNUNET_NO, NULL, GNUNET_NO, NULL);
   id = GNUNET_IDENTITY_connect (cfg, &identity_recv_ego, NULL);
   gns = GNUNET_GNS_connect (cfg);
   namestore = GNUNET_NAMESTORE_connect (cfg);
@@ -3114,28 +3604,79 @@ run (void *cls, struct GNUNET_SERVER_Handle *server,
 
   GNUNET_DISK_directory_scan (dir_apps, scan_app_dir, NULL);
 
-  nc = GNUNET_SERVER_notification_context_create (server, 1);
-  GNUNET_SERVER_add_handlers (server, handlers);
-  GNUNET_SERVER_disconnect_notify (server, &client_disconnect, NULL);
-  GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
-                                &shutdown_task, NULL);
-}
-
-
-/**
- * The main function for the service.
- *
- * @param argc number of arguments from the command line
- * @param argv command line arguments
- * @return 0 ok, 1 on error
- */
-int
-main (int argc, char *const *argv)
-{
-  return (GNUNET_OK ==
-          GNUNET_SERVICE_run (argc, argv, "social",
-                             GNUNET_SERVICE_OPTION_NONE,
-                              &run, NULL)) ? 0 : 1;
-}
+  GNUNET_SCHEDULER_add_shutdown (shutdown_task, NULL);
+}
+
+
+/**
+ * Define "main" method using service macro.
+ */
+GNUNET_SERVICE_MAIN
+("social",
+ GNUNET_SERVICE_OPTION_NONE,
+ run,
+ client_notify_connect,
+ client_notify_disconnect,
+ NULL,
+ GNUNET_MQ_hd_var_size (client_host_enter,
+                        GNUNET_MESSAGE_TYPE_SOCIAL_HOST_ENTER,
+                        struct HostEnterRequest,
+                        NULL),
+ GNUNET_MQ_hd_var_size (client_guest_enter,
+                        GNUNET_MESSAGE_TYPE_SOCIAL_GUEST_ENTER,
+                        struct GuestEnterRequest,
+                        NULL),
+ GNUNET_MQ_hd_var_size (client_guest_enter_by_name,
+                        GNUNET_MESSAGE_TYPE_SOCIAL_GUEST_ENTER_BY_NAME,
+                        struct GuestEnterByNameRequest,
+                        NULL),
+ GNUNET_MQ_hd_var_size (client_join_decision,
+                        GNUNET_MESSAGE_TYPE_PSYC_JOIN_DECISION,
+                        struct GNUNET_PSYC_JoinDecisionMessage,
+                        NULL),
+ GNUNET_MQ_hd_var_size (client_psyc_message,
+                        GNUNET_MESSAGE_TYPE_PSYC_MESSAGE,
+                        struct GNUNET_MessageHeader,
+                        NULL),
+ GNUNET_MQ_hd_var_size (client_history_replay,
+                        GNUNET_MESSAGE_TYPE_PSYC_HISTORY_REPLAY,
+                        struct GNUNET_PSYC_HistoryRequestMessage,
+                        NULL),
+ GNUNET_MQ_hd_var_size (client_state_get,
+                        GNUNET_MESSAGE_TYPE_PSYC_STATE_GET,
+                        struct GNUNET_PSYC_StateRequestMessage,
+                        NULL),
+ GNUNET_MQ_hd_var_size (client_state_get_prefix,
+                        GNUNET_MESSAGE_TYPE_PSYC_STATE_GET_PREFIX,
+                        struct GNUNET_PSYC_StateRequestMessage,
+                        NULL),
+ GNUNET_MQ_hd_var_size (client_zone_add_place,
+                        GNUNET_MESSAGE_TYPE_SOCIAL_ZONE_ADD_PLACE,
+                        struct ZoneAddPlaceRequest,
+                        NULL),
+ GNUNET_MQ_hd_var_size (client_zone_add_nym,
+                        GNUNET_MESSAGE_TYPE_SOCIAL_ZONE_ADD_NYM,
+                        struct ZoneAddNymRequest,
+                        NULL),
+ GNUNET_MQ_hd_var_size (client_app_connect,
+                        GNUNET_MESSAGE_TYPE_SOCIAL_APP_CONNECT,
+                        struct AppConnectRequest,
+                        NULL),
+ GNUNET_MQ_hd_fixed_size (client_app_detach,
+                          GNUNET_MESSAGE_TYPE_SOCIAL_APP_DETACH,
+                          struct AppDetachRequest,
+                          NULL),
+ GNUNET_MQ_hd_fixed_size (client_place_leave,
+                          GNUNET_MESSAGE_TYPE_SOCIAL_PLACE_LEAVE,
+                          struct GNUNET_MessageHeader,
+                          NULL),
+ GNUNET_MQ_hd_var_size (client_msg_proc_set,
+                        GNUNET_MESSAGE_TYPE_SOCIAL_MSG_PROC_SET,
+                        struct MsgProcRequest,
+                        NULL),
+ GNUNET_MQ_hd_fixed_size (client_msg_proc_clear,
+                          GNUNET_MESSAGE_TYPE_SOCIAL_MSG_PROC_CLEAR,
+                          struct GNUNET_MessageHeader,
+                          NULL));
 
 /* end of gnunet-service-social.c */