/*
 * reshook.h - dnssec-trigger resolv.conf hooks for adjusting name resolution 
 *
 * Copyright (c) 2011, 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 the unbound hooks for adjusting the name resolution
 * on the system (to 127.0.0.1).
 */

#ifndef RESHOOKS_H
#define RESHOOKS_H
struct cfg;
struct probe_ip;

/**
 * Set the system to resolve at 127.0.0.1 (where unbound is running)
 * @param cfg: with config options.
 */
void hook_resolv_localhost(struct cfg* cfg);

/**
 * Set the system to resolve at the list of 'cache' (recursive) probes in
 * the given list.  The original servers are used, not DNSTCP recursive probes.
 * @param cfg: with config options.
 */
void hook_resolv_iplist(struct cfg* cfg, struct probe_ip* list);

/**
 * Flush the DNS caches on the system, if somehow possible
 * @param cfg: with config options.
 */
void hook_resolv_flush(struct cfg* cfg);

#ifdef HOOKS_OSX
/** on OSX we need to restore resolv.conf after user login */
void restore_resolv_osx(struct cfg* cfg);
#endif /*  HOOKS_OSX */

/**
 * Unregister the override we put in place.
 * The override survives reboots, this uninit is for uninstall.
 */
void hook_resolv_uninstall(struct cfg* cfg);

#endif /* RESHOOKS_H */