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nsec.h
/* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ #ifndef DNS_NSEC_H #define DNS_NSEC_H 1 /*! \file dns/nsec.h */ #include <stdbool.h> #include <isc/lang.h> #include <dns/types.h> #include <dns/name.h> #define DNS_NSEC_BUFFERSIZE (DNS_NAME_MAXWIRE + 8192 + 512) ISC_LANG_BEGINDECLS isc_result_t dns_nsec_buildrdata(dns_db_t *db, dns_dbversion_t *version, dns_dbnode_t *node, dns_name_t *target, unsigned char *buffer, dns_rdata_t *rdata); /*%< * Build the rdata of a NSEC record. * * Requires: *\li buffer Points to a temporary buffer of at least * DNS_NSEC_BUFFERSIZE bytes. *\li rdata Points to an initialized dns_rdata_t. * * Ensures: * \li *rdata Contains a valid NSEC rdata. The 'data' member refers * to 'buffer'. */ isc_result_t dns_nsec_build(dns_db_t *db, dns_dbversion_t *version, dns_dbnode_t *node, dns_name_t *target, dns_ttl_t ttl); /*%< * Build a NSEC record and add it to a database. */ bool dns_nsec_typepresent(dns_rdata_t *nsec, dns_rdatatype_t type); /*%< * Determine if a type is marked as present in an NSEC record. * * Requires: *\li 'nsec' points to a valid rdataset of type NSEC */ isc_result_t dns_nsec_nseconly(dns_db_t *db, dns_dbversion_t *version, bool *answer); /* * Report whether the DNSKEY RRset has a NSEC only algorithm. Unknown * algorithms are assumed to support NSEC3. If DNSKEY is not found, * *answer is set to false, and ISC_R_NOTFOUND is returned. * * Requires: * 'answer' to be non NULL. */ unsigned int dns_nsec_compressbitmap(unsigned char *map, const unsigned char *raw, unsigned int max_type); /*%< * Convert a raw bitmap into a compressed windowed bit map. 'map' and 'raw' * may overlap. * * Returns the length of the compressed windowed bit map. */ void dns_nsec_setbit(unsigned char *array, unsigned int type, unsigned int bit); /*%< * Set type bit in raw 'array' to 'bit'. */ bool dns_nsec_isset(const unsigned char *array, unsigned int type); /*%< * Test if the corresponding 'type' bit is set in 'array'. */ isc_result_t dns_nsec_noexistnodata(dns_rdatatype_t type, dns_name_t *name, dns_name_t *nsecname, dns_rdataset_t *nsecset, bool *exists, bool *data, dns_name_t *wild, dns_nseclog_t log, void *arg); /*% * Return ISC_R_SUCCESS if we can determine that the name doesn't exist * or we can determine whether there is data or not at the name. * If the name does not exist return the wildcard name. * * Return ISC_R_IGNORE when the NSEC is not the appropriate one. */ ISC_LANG_ENDDECLS #endif /* DNS_NSEC_H */
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