forward.h revision dafcb997e390efa4423883dafd100c975c4095d6
/*
* Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2000, 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: forward.h,v 1.3 2004/03/05 05:09:42 marka Exp $ */
#ifndef DNS_FORWARD_H
#define DNS_FORWARD_H 1
#include <isc/lang.h>
#include <isc/result.h>
#include <dns/types.h>
ISC_LANG_BEGINDECLS
struct dns_forwarders {
isc_sockaddrlist_t addrs;
dns_fwdpolicy_t fwdpolicy;
};
isc_result_t
dns_fwdtable_create(isc_mem_t *mctx, dns_fwdtable_t **fwdtablep);
/*
* Creates a new forwarding table.
*
* Requires:
* mctx is a valid memory context.
* fwdtablep != NULL && *fwdtablep == NULL
*
* Returns:
* ISC_R_SUCCESS
* ISC_R_NOMEMORY
*/
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 list is copied if not empty, so the caller should free its copy.
*
* Requires:
* fwdtable is a valid forwarding table.
* name is a valid name
* addrs is a valid list of sockaddrs, which may be empty.
*
* Returns:
* ISC_R_SUCCESS
* ISC_R_NOMEMORY
*/
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:
* fwdtable is a valid forwarding table.
* name is a valid name
* forwardersp != NULL && *forwardersp == NULL
*
* Returns:
* ISC_R_SUCCESS
* ISC_R_NOTFOUND
*/
void
dns_fwdtable_destroy(dns_fwdtable_t **fwdtablep);
/*
* Destroys a forwarding table.
*
* Requires:
* fwtablep != NULL && *fwtablep != NULL
*
* Ensures:
* all memory associated with the forwarding table is freed.
*/
ISC_LANG_ENDDECLS
#endif /* DNS_FORWARD_H */