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64 lines
2.6 KiB
C
64 lines
2.6 KiB
C
/*
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* iterator/iter_scrub.h - scrubbing, normalization, sanitization of DNS msgs.
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*
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* Copyright (c) 2007, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file has routine(s) for cleaning up incoming DNS messages from
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* possible useless or malicious junk in it.
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*/
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#ifndef ITERATOR_ITER_SCRUB_H
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#define ITERATOR_ITER_SCRUB_H
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struct msg_parse;
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struct query_info;
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struct region;
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/**
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* Cleanup the passed dns message.
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* @param pkt: the packet itself, for resolving name compression pointers.
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* the packet buffer is unaltered.
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* @param msg: the parsed packet, this structure is cleaned up.
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* @param qinfo: the query info that was sent to the server. Checked.
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* @param zonename: the name of the last delegation point.
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* Used to determine out of bailiwick information.
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* @param region: where to allocate (new) parts of the message.
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* @return: false if the message is total waste. true if scrubbed with success.
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*/
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int scrub_message(ldns_buffer* pkt, struct msg_parse* msg,
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struct query_info* qinfo, uint8_t* zonename, struct region* region);
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#endif /* ITERATOR_ITER_SCRUB_H */
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