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/*
* 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 http://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, dns_name_t *name,
dns_forwarderlist_t *fwdrs, dns_fwdpolicy_t policy);
isc_result_t
dns_fwdtable_add(dns_fwdtable_t *fwdtable, 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, 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, dns_name_t *name,
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
*
* Returns:
* \li #ISC_R_SUCCESS
* \li #ISC_R_NOTFOUND
*/
isc_result_t
dns_fwdtable_find2(dns_fwdtable_t *fwdtable, 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 */