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diff --git a/contrib/unbound/libunbound/libworker.h b/contrib/unbound/libunbound/libworker.h
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+/*
+ * libunbound/worker.h - worker thread or process that resolves
+ *
+ * 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 REGENTS 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 the worker process or thread that performs
+ * the DNS resolving and validation. The worker is called by a procedure
+ * and if in the background continues until exit, if in the foreground
+ * returns from the procedure when done.
+ */
+#ifndef LIBUNBOUND_WORKER_H
+#define LIBUNBOUND_WORKER_H
+#include "util/data/packed_rrset.h"
+struct ub_ctx;
+struct ub_result;
+struct module_env;
+struct comm_base;
+struct outside_network;
+struct ub_randstate;
+struct ctx_query;
+struct outbound_entry;
+struct module_qstate;
+struct comm_point;
+struct comm_reply;
+struct regional;
+struct tube;
+
+/** 
+ * The library-worker status structure
+ * Internal to the worker.
+ */
+struct libworker {
+	/** every worker has a unique thread_num. (first in struct) */
+	int thread_num;
+	/** context we are operating under */
+	struct ub_ctx* ctx;
+
+	/** is this the bg worker? */
+	int is_bg;
+	/** is this a bg worker that is threaded (not forked)? */
+	int is_bg_thread;
+
+	/** copy of the module environment with worker local entries. */
+	struct module_env* env;
+	/** the event base this worker works with */
+	struct comm_base* base;
+	/** the backside outside network interface to the auth servers */
+	struct outside_network* back;
+	/** random() table for this worker. */
+	struct ub_randstate* rndstate;
+	/** sslcontext for SSL wrapped DNS over TCP queries */
+	void* sslctx;
+};
+
+/**
+ * Create a background worker
+ * @param ctx: is updated with pid/tid of the background worker.
+ *	a new allocation cache is obtained from ctx. It contains the
+ *	threadnumber and unique id for further (shared) cache insertions.
+ * @return 0 if OK, else error.
+ *	Further communication is done via the pipes in ctx. 
+ */
+int libworker_bg(struct ub_ctx* ctx);
+
+/**
+ * Create a foreground worker.
+ * This worker will join the threadpool of resolver threads.
+ * It exits when the query answer has been obtained (or error).
+ * This routine blocks until the worker is finished.
+ * @param ctx: new allocation cache obtained and returned to it.
+ * @param q: query (result is stored in here).
+ * @return 0 if finished OK, else error.
+ */
+int libworker_fg(struct ub_ctx* ctx, struct ctx_query* q);
+
+/** cleanup the cache to remove all rrset IDs from it, arg is libworker */
+void libworker_alloc_cleanup(void* arg);
+
+/**
+ * Worker service routine to send serviced queries to authoritative servers.
+ * @param qname: query name. (host order)
+ * @param qnamelen: length in bytes of qname, including trailing 0.
+ * @param qtype: query type. (host order)
+ * @param qclass: query class. (host order)
+ * @param flags: host order flags word, with opcode and CD bit.
+ * @param dnssec: if set, EDNS record will have DO bit set.
+ * @param want_dnssec: signatures needed.
+ * @param addr: where to.
+ * @param addrlen: length of addr.
+ * @param zone: delegation point name.
+ * @param zonelen: length of zone name wireformat dname.
+ * @param q: wich query state to reactivate upon return.
+ * @return: false on failure (memory or socket related). no query was
+ *      sent.
+ */
+struct outbound_entry* libworker_send_query(uint8_t* qname, size_t qnamelen,
+        uint16_t qtype, uint16_t qclass, uint16_t flags, int dnssec,
+	int want_dnssec, struct sockaddr_storage* addr, socklen_t addrlen,
+	uint8_t* zone, size_t zonelen, struct module_qstate* q);
+
+/** process incoming replies from the network */
+int libworker_handle_reply(struct comm_point* c, void* arg, int error,
+        struct comm_reply* reply_info);
+
+/** process incoming serviced query replies from the network */
+int libworker_handle_service_reply(struct comm_point* c, void* arg, int error,
+        struct comm_reply* reply_info);
+
+/** handle control command coming into server */
+void libworker_handle_control_cmd(struct tube* tube, uint8_t* msg, size_t len,
+	int err, void* arg);
+
+/** handle opportunity to write result back */
+void libworker_handle_result_write(struct tube* tube, uint8_t* msg, size_t len,
+	int err, void* arg);
+
+/** mesh callback with fg results */
+void libworker_fg_done_cb(void* arg, int rcode, ldns_buffer* buf, 
+	enum sec_status s, char* why_bogus);
+
+/** mesh callback with bg results */
+void libworker_bg_done_cb(void* arg, int rcode, ldns_buffer* buf, 
+	enum sec_status s, char* why_bogus);
+
+/** 
+ * fill result from parsed message, on error fills servfail 
+ * @param res: is clear at start, filled in at end.
+ * @param buf: contains DNS message.
+ * @param temp: temporary buffer for parse.
+ * @param msg_security: security status of the DNS message.
+ *   On error, the res may contain a different status 
+ *   (out of memory is not secure, not bogus).
+ */
+void libworker_enter_result(struct ub_result* res, ldns_buffer* buf,
+	struct regional* temp, enum sec_status msg_security);
+
+#endif /* LIBUNBOUND_WORKER_H */