110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/*
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* This file is part of the Sofia-SIP package
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*
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* Copyright (C) 2005 Nokia Corporation.
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*
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* Contact: Pekka Pessi <pekka.pessi@nokia.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#ifndef SOFIA_RESOLV_SRES_CACHE_H
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/** Defined when <sofia-resolv/sres_cache.h> has been included. */
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#define SOFIA_RESOLV_SRES_CACHE_H
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/**
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* @file sofia-resolv/sres_cache.h Sofia DNS Resolver Cache.
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*
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* @author Pekka Pessi <Pekka.Pessi@nokia.com>,
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*
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* @par Include Context
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* @code
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* #include <sys/types.h>
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* #include <sys/socket.h>
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* #include <netinet/in.h>
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* #include <sofia-resolv/sres_cache.h>
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* @endcode
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*
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*/
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#include "sofia-resolv/sres_config.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef SRES_CACHE_T
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#define SRES_CACHE_T
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/** Opaque type of DNS cache object. */
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typedef struct sres_cache sres_cache_t;
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#endif
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#ifndef SRES_RECORD_T
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#define SRES_RECORD_T
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/** Type representing any DNS record. */
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typedef union sres_record sres_record_t;
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#endif
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enum {
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/** Cache cleanup interval in seconds. */
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SRES_CACHE_TIMER_INTERVAL = 30,
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#define SRES_CACHE_TIMER_INTERVAL (SRES_CACHE_TIMER_INTERVAL)
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};
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/** Create a resolver cache object. */
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SRESPUBFUN sres_cache_t *sres_cache_new(int n);
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/** Increase reference count on a resolver cache object. */
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SRESPUBFUN sres_cache_t *sres_cache_ref(sres_cache_t *);
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/** Decrease the reference count on a resolver cache object. */
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SRESPUBFUN void sres_cache_unref(sres_cache_t *);
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/** Get a list of matching records from cache. */
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SRESPUBFUN int sres_cache_get(sres_cache_t *cache,
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uint16_t type,
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char const *domain,
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sres_record_t ***return_cached);
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/** Free answers not matching with type */
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SRESPUBFUN int sres_cache_filter(sres_cache_t *cache,
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sres_record_t **answers,
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uint16_t type);
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/** Free the list records. */
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SRESPUBFUN void sres_cache_free_answers(sres_cache_t *, sres_record_t **);
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/** Free and zero one record. */
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SRESPUBFUN void sres_cache_free_one(sres_cache_t *, sres_record_t *answer);
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/** Allocate a cache record */
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SRESPUBFUN
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sres_record_t *sres_cache_alloc_record(sres_cache_t *cache,
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sres_record_t const *template,
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size_t extra);
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/** Free a record that has not been stored. */
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SRESPUBFUN void sres_cache_free_record(sres_cache_t *cache, void *rr);
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/** Store a record to cache */
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SRESPUBFUN void sres_cache_store(sres_cache_t *, sres_record_t *, time_t now);
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#ifdef __cplusplus
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}
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#endif
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#endif /* SOFIA_RESOLV_SRES_CACHED_H */
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