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Diffstat (limited to 'lib/dns/include/dns/forward.h')
| -rw-r--r-- | lib/dns/include/dns/forward.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/lib/dns/include/dns/forward.h b/lib/dns/include/dns/forward.h new file mode 100644 index 0000000..f43fce7 --- /dev/null +++ b/lib/dns/include/dns/forward.h @@ -0,0 +1,123 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * 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. + */ + +#pragma once + +/*! \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_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 + * \li #ISC_R_NOSPACE + */ + +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 Success + * \li #DNS_R_PARTIALMATCH Superdomain found with data + * \li #ISC_R_NOTFOUND No match + * \li #ISC_R_NOSPACE Concatenating nodes to form foundname failed + */ + +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 |