/* * 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_FORWARD_H #define DNS_FORWARD_H 1 /*! \file dns/forward.h */ #include <isc/lang.h> #include <isc/result.h> #include <isc/sockaddr.h> #include <dns/types.h> ISC_LANG_BEGINDECLS struct dns_forwarder { isc_sockaddr_t addr; isc_dscp_t dscp; ISC_LINK(dns_forwarder_t) link; }; typedef ISC_LIST(struct dns_forwarder) dns_forwarderlist_t; struct dns_forwarders { dns_forwarderlist_t fwdrs; dns_fwdpolicy_t fwdpolicy; }; isc_result_t dns_fwdtable_create(isc_mem_t *mctx, dns_fwdtable_t **fwdtablep); /*%< * Creates a new forwarding table. * * Requires: * \li mctx is a valid memory context. * \li fwdtablep != NULL && *fwdtablep == NULL * * Returns: * \li #ISC_R_SUCCESS * \li #ISC_R_NOMEMORY */ isc_result_t dns_fwdtable_addfwd(dns_fwdtable_t *fwdtable, const dns_name_t *name, dns_forwarderlist_t *fwdrs, dns_fwdpolicy_t policy); isc_result_t dns_fwdtable_add(dns_fwdtable_t *fwdtable, const dns_name_t *name, isc_sockaddrlist_t *addrs, dns_fwdpolicy_t policy); /*%< * Adds an entry to the forwarding table. The entry associates * a domain with a list of forwarders and a forwarding policy. The * addrs/fwdrs list is copied if not empty, so the caller should free * its copy. * * Requires: * \li fwdtable is a valid forwarding table. * \li name is a valid name * \li addrs/fwdrs is a valid list of isc_sockaddr/dns_forwarder * structures, which may be empty. * * Returns: * \li #ISC_R_SUCCESS * \li #ISC_R_NOMEMORY */ isc_result_t dns_fwdtable_delete(dns_fwdtable_t *fwdtable, const dns_name_t *name); /*%< * Removes an entry for 'name' from the forwarding table. If an entry * that exactly matches 'name' does not exist, ISC_R_NOTFOUND will be returned. * * Requires: * \li fwdtable is a valid forwarding table. * \li name is a valid name * * Returns: * \li #ISC_R_SUCCESS * \li #ISC_R_NOTFOUND */ isc_result_t dns_fwdtable_find(dns_fwdtable_t *fwdtable, const dns_name_t *name, dns_name_t *foundname, dns_forwarders_t **forwardersp); /*%< * Finds a domain in the forwarding table. The closest matching parent * domain is returned. * * Requires: * \li fwdtable is a valid forwarding table. * \li name is a valid name * \li forwardersp != NULL && *forwardersp == NULL * \li foundname to be NULL or a valid name with buffer. * * Returns: * \li #ISC_R_SUCCESS * \li #ISC_R_NOTFOUND */ void dns_fwdtable_destroy(dns_fwdtable_t **fwdtablep); /*%< * Destroys a forwarding table. * * Requires: * \li fwtablep != NULL && *fwtablep != NULL * * Ensures: * \li all memory associated with the forwarding table is freed. */ ISC_LANG_ENDDECLS #endif /* DNS_FORWARD_H */