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diff --git a/src/testbed/gnunet-service-testbed_links.h b/src/testbed/gnunet-service-testbed_links.h
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+/*
+  This file is part of GNUnet.
+  (C) 2008--2013 Christian Grothoff (and other contributing authors)
+
+  GNUnet is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 2, or (at your
+  option) any later version.
+
+  GNUnet is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with GNUnet; see the file COPYING.  If not, write to the
+  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+  Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file testbed/gnunet-service-testbed_links.h
+ * @brief TESTBED service components that deals with starting slave controllers
+ *          and establishing lateral links between controllers
+ * @author Sree Harsha Totakura
+ */
+
+struct Neighbour;
+
+
+/**
+ * Structure representing a connected(directly-linked) controller
+ */
+struct Slave
+{
+  /**
+   * The controller process handle if we had started the controller
+   */
+  struct GNUNET_TESTBED_ControllerProc *controller_proc;
+
+  /**
+   * The controller handle
+   */
+  struct GNUNET_TESTBED_Controller *controller;
+
+  /**
+   * handle to lcc which is associated with this slave startup. Should be set to
+   * NULL when the slave has successfully started up
+   */
+  struct LinkControllersContext *lcc;
+
+  /**
+   * Head of the host registration DLL
+   */
+  struct HostRegistration *hr_dll_head;
+
+  /**
+   * Tail of the host registration DLL
+   */
+  struct HostRegistration *hr_dll_tail;
+
+  /**
+   * The current host registration handle
+   */
+  struct GNUNET_TESTBED_HostRegistrationHandle *rhandle;
+
+  /**
+   * Hashmap to hold Registered host contexts
+   */
+  struct GNUNET_CONTAINER_MultiHashMap *reghost_map;
+
+  /**
+   * Operation handle for opening a lateral connection to another controller.
+   * Will be NULL if the slave controller is started by this controller
+   */
+  struct GNUNET_TESTBED_Operation *conn_op;
+
+  /**
+   * The id of the host this controller is running on
+   */
+  uint32_t host_id;
+
+};
+
+/**
+ * A list of directly linked neighbours
+ */
+extern struct Slave **GST_slave_list;
+
+/**
+ * The size of directly linked neighbours list
+ */
+extern unsigned int GST_slave_list_size;
+
+void
+GST_neighbour_list_clean();
+
+struct Neighbour *
+GST_get_neighbour (uint32_t id);
+
+void
+GST_free_nccq ();
+
+struct NeighbourConnectNotification;
+
+typedef void (*GST_NeigbourConnectNotifyCallback) (void *cls,
+                                                   struct
+                                                   GNUNET_TESTBED_Controller
+                                                   *controller);
+
+struct NeighbourConnectNotification *
+GST_neighbour_get_connection (struct Neighbour *n,
+                              GST_NeigbourConnectNotifyCallback cb,
+                              void *cb_cls);
+
+void
+GST_neighbour_get_connection_cancel (struct NeighbourConnectNotification *h);
+
+void
+GST_neighbour_release_connection (struct Neighbour *n);
+
+/**
+ * Message handler for GNUNET_MESSAGE_TYPE_TESTBED_LCONTROLLERS message
+ *
+ * @param cls NULL
+ * @param client identification of the client
+ * @param message the actual message
+ */
+void
+GST_handle_link_controllers (void *cls, struct GNUNET_SERVER_Client *client,
+                             const struct GNUNET_MessageHeader *message);
+
+
+/**
+ * Cleans up the slave list
+ */
+void
+GST_slave_list_clear ();