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iter_delegpt.c
(18.04 KB)
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iter_delegpt.h
(15.09 KB)
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iter_donotq.c
(4.21 KB)
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iter_donotq.h
(3.24 KB)
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iter_fwd.c
(13.13 KB)
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iter_fwd.h
(6.31 KB)
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iter_hints.c
(15.19 KB)
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iter_hints.h
(5.45 KB)
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iter_priv.c
(8.44 KB)
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iter_priv.h
(3.46 KB)
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iter_resptype.c
(10.27 KB)
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iter_resptype.h
(4.3 KB)
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iter_scrub.c
(26.53 KB)
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iter_scrub.h
(2.8 KB)
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iter_utils.c
(42.44 KB)
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iter_utils.h
(14.88 KB)
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iterator.c
(135.78 KB)
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iterator.h
(14.77 KB)
Editing: iter_resptype.h
/* * iterator/iter_resptype.h - response type information and classification. * * 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 defines the response type. DNS Responses can be classified as * one of the response types. */ #ifndef ITERATOR_ITER_RESPTYPE_H #define ITERATOR_ITER_RESPTYPE_H struct dns_msg; struct query_info; struct delegpt; /** * The response type is used to interpret the response. */ enum response_type { /** * 'untyped' means that the type of this response hasn't been * assigned. */ RESPONSE_TYPE_UNTYPED = 0, /** * 'answer' means that the response terminates the resolution * process. */ RESPONSE_TYPE_ANSWER, /** 'delegation' means that the response is a delegation. */ RESPONSE_TYPE_REFERRAL, /** * 'cname' means that the response is a cname without the final * answer, and thus must be restarted. */ RESPONSE_TYPE_CNAME, /** * 'throwaway' means that this particular response should be * discarded and the next nameserver should be contacted */ RESPONSE_TYPE_THROWAWAY, /** * 'lame' means that this particular response indicates that * the nameserver knew nothing about the question. */ RESPONSE_TYPE_LAME, /** * Recursion lame means that the nameserver is some sort of * open recursor, and not authoritative for the question. * It may know something, but not authoritatively. */ RESPONSE_TYPE_REC_LAME }; /** * Classifies a response message from cache based on the current request. * Note that this routine assumes that THROWAWAY or LAME responses will not * occur. Also, it will not detect REFERRAL type messages, since those are * (currently) automatically classified based on how they came from the * cache (findDelegation() instead of lookup()). * * @param msg: the message from the cache. * @param request: the request that generated the response. * @return the response type (CNAME or ANSWER). */ enum response_type response_type_from_cache(struct dns_msg* msg, struct query_info* request); /** * Classifies a response message (from the wire) based on the current * request. * * NOTE: currently this routine uses the AA bit in the response to help * distinguish between some non-standard referrals and answers. It also * relies somewhat on the originating zone to be accurate (for lameness * detection, mostly). * * @param rdset: if RD bit was sent in query sent by unbound. * @param msg: the message from the cache. * @param request: the request that generated the response. * @param dp: The delegation point that was being queried * when the response was returned. * @return the response type (CNAME or ANSWER). */ enum response_type response_type_from_server(int rdset, struct dns_msg* msg, struct query_info* request, struct delegpt* dp); #endif /* ITERATOR_ITER_RESPTYPE_H */
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