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diff --git a/src/testbed/testbed_api_hosts.h b/src/testbed/testbed_api_hosts.h
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+/*
+      This file is part of GNUnet
+      (C) 2008--2012 Christian Grothoff (and other contributing authors)
+
+      GNUnet is free software; you can redistribute it and/or modify
+      it under the terms of the GNU General Public License as published
+      by the Free Software Foundation; either version 3, or (at your
+      option) any later version.
+
+      GNUnet is distributed in the hope that it will be useful, but
+      WITHOUT ANY WARRANTY; without even the implied warranty of
+      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+      General Public License for more details.
+
+      You should have received a copy of the GNU General Public License
+      along with GNUnet; see the file COPYING.  If not, write to the
+      Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+      Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * @file testbed/testbed_api_hosts.h
+ * @brief internal API to access the 'hosts' subsystem
+ * @author Christian Grothoff
+ */
+#ifndef NEW_TESTING_API_HOSTS_H
+#define NEW_TESTING_API_HOSTS_H
+
+#include "gnunet_testbed_service.h"
+#include "gnunet_helper_lib.h"
+
+
+/**
+ * Lookup a host by ID.
+ * 
+ * @param id global host ID assigned to the host; 0 is
+ *        reserved to always mean 'localhost'
+ * @return handle to the host, NULL on error
+ */
+struct GNUNET_TESTBED_Host *
+GNUNET_TESTBED_host_lookup_by_id_ (uint32_t id);
+
+
+/**
+ * Create a host by ID; given this host handle, we could not
+ * run peers at the host, but we can talk about the host
+ * internally.
+ * 
+ * @param id global host ID assigned to the host; 0 is
+ *        reserved to always mean 'localhost'
+ * @return handle to the host, NULL on error
+ */
+struct GNUNET_TESTBED_Host *
+GNUNET_TESTBED_host_create_by_id_ (uint32_t id);
+
+
+/**
+ * Create a host to run peers and controllers on.  This function is used
+ * if a peer learns about a host via IPC between controllers (and thus 
+ * some higher-level controller has already determined the unique IDs).
+ * 
+ * @param id global host ID assigned to the host; 0 is
+ *        reserved to always mean 'localhost'
+ * @param hostname name of the host, use "NULL" for localhost
+ * @param username username to use for the login; may be NULL
+ * @param port port number to use for ssh; use 0 to let ssh decide
+ * @return handle to the host, NULL on error
+ */
+struct GNUNET_TESTBED_Host *
+GNUNET_TESTBED_host_create_with_id_ (uint32_t id,
+				     const char *hostname,
+				     const char *username,
+				     uint16_t port);
+
+
+/**
+ * Obtain a host's unique global ID.
+ * 
+ * @param host handle to the host, NULL means 'localhost'
+ * @return id global host ID assigned to the host (0 is
+ *         'localhost', but then obviously not globally unique)
+ */
+uint32_t
+GNUNET_TESTBED_host_get_id_ (struct GNUNET_TESTBED_Host *host);
+
+
+/**
+ * Run a given helper process at the given host.  Communication
+ * with the helper will be via GNUnet messages on stdin/stdout.
+ * Runs the process via 'ssh' at the specified host, or locally.
+ * Essentially an SSH-wrapper around the 'gnunet_helper_lib.h' API.
+ * 
+ * @param host host to use, use "NULL" for localhost
+ * @param binary_argv binary name and command-line arguments to give to the binary
+ * @param cb function to call for messages received from the binary
+ * @param cb_cls closure for cb
+ * @return handle to terminate the command, NULL on error
+ */
+struct GNUNET_HELPER_Handle *
+GNUNET_TESTBED_host_run_ (struct GNUNET_TESTBED_Host *host,
+			  char *const binary_argv[],
+			  GNUNET_SERVER_MessageTokenizerCallback cb, void *cb_cls);
+
+#endif
+/* end of testbed_api_hosts.h */