102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
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/*
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* iterator/iter_donotq.h - iterative resolver donotqueryaddresses storage.
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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
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE 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 contains functions to assist the iterator module.
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* Keep track of the donotquery addresses and lookup fast.
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*/
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#ifndef ITERATOR_ITER_DONOTQ_H
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#define ITERATOR_ITER_DONOTQ_H
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#include "util/storage/dnstree.h"
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struct iter_env;
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struct config_file;
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struct regional;
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/**
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* Iterator donotqueryaddresses structure
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*/
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struct iter_donotq {
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/** regional for allocation */
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struct regional* region;
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/**
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* Tree of the address spans that are blocked.
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* contents of type addr_tree_node. Each node is an address span
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* that must not be used to send queries to.
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*/
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rbtree_t tree;
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};
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/**
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* Create donotqueryaddresses structure
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* @return new structure or NULL on error.
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*/
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struct iter_donotq* donotq_create(void);
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/**
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* Delete donotqueryaddresses structure.
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* @param donotq: to delete.
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*/
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void donotq_delete(struct iter_donotq* donotq);
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/**
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* Process donotqueryaddresses config.
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* @param donotq: where to store.
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* @param cfg: config options.
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* @return 0 on error.
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*/
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int donotq_apply_cfg(struct iter_donotq* donotq, struct config_file* cfg);
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/**
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* See if an address is blocked.
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* @param donotq: structure for address storage.
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* @param addr: address to check
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* @param addrlen: length of addr.
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* @return: true if the address must not be queried. false if unlisted.
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*/
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int donotq_lookup(struct iter_donotq* donotq, struct sockaddr_storage* addr,
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socklen_t addrlen);
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/**
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* Get memory used by donotqueryaddresses structure.
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* @param donotq: structure for address storage.
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* @return bytes in use.
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*/
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size_t donotq_get_mem(struct iter_donotq* donotq);
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#endif /* ITERATOR_ITER_DONOTQ_H */
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