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diff --git a/contrib/unbound/services/outbound_list.h b/contrib/unbound/services/outbound_list.h
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+/*
+ * services/outbound_list.h - keep list of outbound serviced queries.
+ *
+ * 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
+ *
+ * This file contains functions to help a module keep track of the
+ * queries it has outstanding to authoritative servers.
+ */
+#ifndef SERVICES_OUTBOUND_LIST_H
+#define SERVICES_OUTBOUND_LIST_H
+struct outbound_entry;
+struct serviced_query;
+struct module_qstate;
+
+/**
+ * The outbound list. This structure is part of the module specific query
+ * state.
+ */
+struct outbound_list {
+	/** The linked list of outbound query entries. */
+	struct outbound_entry* first;
+};
+
+/**
+ * Outbound list entry. A serviced query sent by a module processing the
+ * query from the qstate. Double linked list to aid removal.
+ */
+struct outbound_entry {
+	/** next in list */
+	struct outbound_entry* next;
+	/** prev in list */
+	struct outbound_entry* prev;
+	/** The query that was sent out */
+	struct serviced_query* qsent;
+	/** the module query state that sent it */
+	struct module_qstate* qstate;
+};
+
+/**
+ * Init the user allocated outbound list structure
+ * @param list: the list structure.
+ */
+void outbound_list_init(struct outbound_list* list);
+
+/**
+ * Clear the user owner outbound list structure.
+ * Deletes serviced queries.
+ * @param list: the list structure. It is cleared, but the list struct itself
+ * 	is callers responsability to delete.
+ */
+void outbound_list_clear(struct outbound_list* list);
+
+/**
+ * Insert new entry into the list. Caller must allocate the entry with malloc.
+ * qstate and qsent are set by caller.
+ * @param list: the list to add to.
+ * @param e: entry to add, it is only half initialised at call start, fully
+ *	initialised at call end.
+ */
+void outbound_list_insert(struct outbound_list* list, 
+	struct outbound_entry* e);
+
+/**
+ * Remove an entry from the list, and deletes it. 
+ * Deletes serviced query in the entry.
+ * @param list: the list to remove from.
+ * @param e: the entry to remove.
+ */
+void outbound_list_remove(struct outbound_list* list, 
+	struct outbound_entry* e);
+
+#endif /* SERVICES_OUTBOUND_LIST_H */