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diff --git a/external/unbound/testcode/fake_event.h b/external/unbound/testcode/fake_event.h
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+/*
+ * testcode/fake_event.h - fake event handling that replays existing scenario.
+ *
+ * Copyright (c) 2007, NLnet Labs. All rights reserved.
+ * 
+ * This software is open source.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * \file
+ * Event service that replays a scenario.
+ * This implements the same exported symbols as the files:
+ * util/netevent.c
+ * services/listen_dnsport.c
+ * services/outside_network.c
+ * But these do not actually access the network or events, instead
+ * the scenario is played.
+ */
+
+#ifndef TESTCODE_FAKE_EVENT_H
+#define TESTCODE_FAKE_EVENT_H
+struct replay_scenario;
+
+/**
+ * Initialise fake event services.
+ *
+ * The fake event services will automatically start when the main program
+ * calls netevent.h functions, such as comm_base_dispatch().
+ *
+ * @param scen: Set the scenario to use for upcoming event handling.
+ */
+void fake_event_init(struct replay_scenario* scen);
+
+/**
+ * Deinit fake event services.
+ */
+void fake_event_cleanup(void);
+
+/**
+ * Get filename to store temporary config stuff. The pid is added. in /tmp.
+ * @param adj: adjective, like "_cfg_", "_auto_"
+ * @param id: identifier, like "example.com".
+ * @param buf: where to store.
+ * @param len: length of buf.
+ */
+void fake_temp_file(const char* adj, const char* id, char* buf, size_t len);
+
+#endif /* TESTCODE_FAKE_EVENT_H */