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/*
* iterator/iter_scrub.h - scrubbing, normalization, sanitization of DNS msgs.
*
* 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 has routine(s) for cleaning up incoming DNS messages from
* possible useless or malicious junk in it.
*/
#ifndef ITERATOR_ITER_SCRUB_H
#define ITERATOR_ITER_SCRUB_H
#include <ldns/buffer.h>
struct msg_parse;
struct query_info;
struct regional;
struct module_env;
struct iter_env;
/**
* Cleanup the passed dns message.
* @param pkt: the packet itself, for resolving name compression pointers.
* the packet buffer is unaltered.
* @param msg: the parsed packet, this structure is cleaned up.
* @param qinfo: the query info that was sent to the server. Checked.
* @param zonename: the name of the last delegation point.
* Used to determine out of bailiwick information.
* @param regional: where to allocate (new) parts of the message.
* @param env: module environment with config settings and cache.
* @param ie: iterator module environment data.
* @return: false if the message is total waste. true if scrubbed with success.
*/
int scrub_message(ldns_buffer* pkt, struct msg_parse* msg,
struct query_info* qinfo, uint8_t* zonename, struct regional* regional,
struct module_env* env, struct iter_env* ie);
#endif /* ITERATOR_ITER_SCRUB_H */
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