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diff --git a/src/transport/gnunet-service-transport_blacklist.h b/src/transport/gnunet-service-transport_blacklist.h
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+/*
+     This file is part of GNUnet.
+     (C) 2010,2011 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 transport/gnunet-service-transport_blacklist.h
+ * @brief blacklisting API
+ * @author Christian Grothoff
+ */
+#ifndef GNUNET_SERVICE_TRANSPORT_BLACKLIST_H
+#define GNUNET_SERVICE_TRANSPORT_BLACKLIST_H
+
+#include "gnunet_statistics_service.h"
+#include "gnunet_util_lib.h"
+
+/**
+ * Start blacklist subsystem.
+ *
+ * @param server server used to accept clients from
+ */
+void
+GST_blacklist_start (struct GNUNET_SERVER_Handle *server);
+
+
+/**
+ * Stop blacklist subsystem.
+ */
+void
+GST_blacklist_stop (void);
+
+
+/**
+ * Initialize a blacklisting client.  We got a blacklist-init
+ * message from this client, add him to the list of clients
+ * to query for blacklisting.
+ *
+ * @param cls unused
+ * @param client the client
+ * @param message the blacklist-init message that was sent
+ */
+void
+GST_blacklist_handle_init (void *cls, struct GNUNET_SERVER_Client *client,
+                           const struct GNUNET_MessageHeader *message);
+
+/**
+ * A blacklisting client has sent us reply. Process it.
+ *
+ * @param cls unused
+ * @param client the client
+ * @param message the blacklist-init message that was sent
+ */
+void
+GST_blacklist_handle_reply (void *cls, struct GNUNET_SERVER_Client *client,
+                            const struct GNUNET_MessageHeader *message);
+
+/**
+ * Add the given peer to the blacklist (for the given transport).
+ *
+ * @param peer peer to blacklist
+ * @param transport_name transport to blacklist for this peer, NULL for all
+ */
+void
+GST_blacklist_add_peer (const struct GNUNET_PeerIdentity *peer,
+                        const char *transport_name);
+
+
+/**
+ * Handle to an active blacklist check.
+ */
+struct GST_BlacklistCheck;
+
+
+/**
+ * Continuation called from a blacklist test.
+ *
+ * @param cls closure
+ * @param peer identity of peer that was tested
+ * @param result GNUNET_OK if the connection is allowed,
+ *               GNUNET_NO if not
+ */
+typedef void (*GST_BlacklistTestContinuation) (void *cls,
+                                               const struct GNUNET_PeerIdentity
+                                               * peer, int result);
+
+
+/**
+ * Test if a peer/transport combination is blacklisted.
+ *
+ * @param peer the identity of the peer to test
+ * @param transport_name name of the transport to test, never NULL
+ * @param cont function to call with result
+ * @param cont_cls closure for 'cont'
+ * @return handle to the blacklist check, NULL if the decision
+ *        was made instantly and 'cont' was already called
+ */
+struct GST_BlacklistCheck *
+GST_blacklist_test_allowed (const struct GNUNET_PeerIdentity *peer,
+                            const char *transport_name,
+                            GST_BlacklistTestContinuation cont, void *cont_cls);
+
+
+/**
+ * Cancel a blacklist check.
+ *
+ * @param bc check to cancel
+ */
+void
+GST_blacklist_test_cancel (struct GST_BlacklistCheck *bc);
+
+#endif
+/* end of file gnunet-service-transport_blacklist.h */