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112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
/*
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* edns-subnet/subnet-whitelist.h - Hosts we actively try to send subnet option
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* to.
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*
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* Copyright (c) 2013, 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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* Keep track of the white listed servers and domain names for subnet option.
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* Based on acl_list.c|h
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*/
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#ifndef EDNSSUBNET_WHITELIST_H
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#define EDNSSUBNET_WHITELIST_H
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#include "util/storage/dnstree.h"
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struct config_file;
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struct regional;
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/**
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* ecs_whitelist structure
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*/
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struct ecs_whitelist {
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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 whitelisted.
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* contents of type addr_tree_node. Each node is an address span
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* Unbound will append subnet option for.
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*/
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rbtree_type upstream;
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/**
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* Tree of domain names for which Unbound will append an ECS option.
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* rbtree of struct name_tree_node.
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*/
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rbtree_type dname;
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};
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/**
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* Create ecs_whitelist structure
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* @return new structure or NULL on error.
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*/
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struct ecs_whitelist* ecs_whitelist_create(void);
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/**
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* Delete ecs_whitelist structure.
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* @param whitelist: to delete.
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*/
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void ecs_whitelist_delete(struct ecs_whitelist* whitelist);
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/**
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* Process ecs_whitelist config.
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* @param whitelist: 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 ecs_whitelist_apply_cfg(struct ecs_whitelist* whitelist,
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struct config_file* cfg);
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/**
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* See if an address or domain is whitelisted.
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* @param whitelist: 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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* @param qname: dname in query
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* @param qname_len: length of dname
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* @param qclass: class in query
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* @return: true if the address is whitelisted for subnet option.
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*/
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int ecs_is_whitelisted(struct ecs_whitelist* whitelist,
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struct sockaddr_storage* addr, socklen_t addrlen, uint8_t* qname,
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size_t qname_len, uint16_t qclass);
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/**
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* Get memory used by ecs_whitelist structure.
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* @param whitelist: structure for address storage.
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* @return bytes in use.
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*/
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size_t ecs_whitelist_get_mem(struct ecs_whitelist* whitelist);
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#endif /* EDNSSUBNET_WHITELIST_H */
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