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#ifndef foocachehfoo
#define foocachehfoo
/* $Id$ */
/***
This file is part of avahi.
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
avahi is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
typedef struct AvahiCache AvahiCache;
#include <avahi-common/llist.h>
#include "prioq.h"
#include "internal.h"
#include "timeeventq.h"
#include "hashmap.h"
typedef enum {
AVAHI_CACHE_VALID,
AVAHI_CACHE_EXPIRY1,
AVAHI_CACHE_EXPIRY2,
AVAHI_CACHE_EXPIRY3,
AVAHI_CACHE_EXPIRY_FINAL,
AVAHI_CACHE_POOF, /* Passive observation of failure */
AVAHI_CACHE_POOF_FINAL,
AVAHI_CACHE_GOODBYE_FINAL,
AVAHI_CACHE_REPLACE_FINAL
} AvahiCacheEntryState;
typedef struct AvahiCacheEntry AvahiCacheEntry;
struct AvahiCacheEntry {
AvahiCache *cache;
AvahiRecord *record;
struct timeval timestamp;
struct timeval expiry;
int cache_flush;
AvahiAddress origin;
AvahiCacheEntryState state;
AvahiTimeEvent *time_event;
AvahiAddress poof_address;
AVAHI_LLIST_FIELDS(AvahiCacheEntry, by_key);
AVAHI_LLIST_FIELDS(AvahiCacheEntry, entry);
};
struct AvahiCache {
AvahiServer *server;
AvahiInterface *interface;
AvahiHashmap *hashmap;
AVAHI_LLIST_HEAD(AvahiCacheEntry, entries);
unsigned n_entries;
int last_rand;
time_t last_rand_timestamp;
};
AvahiCache *avahi_cache_new(AvahiServer *server, AvahiInterface *interface);
void avahi_cache_free(AvahiCache *c);
void avahi_cache_update(AvahiCache *c, AvahiRecord *r, int cache_flush, const AvahiAddress *a);
int avahi_cache_dump(AvahiCache *c, AvahiDumpCallback callback, void* userdata);
typedef void* AvahiCacheWalkCallback(AvahiCache *c, AvahiKey *pattern, AvahiCacheEntry *e, void* userdata);
void* avahi_cache_walk(AvahiCache *c, AvahiKey *pattern, AvahiCacheWalkCallback cb, void* userdata);
int avahi_cache_entry_half_ttl(AvahiCache *c, AvahiCacheEntry *e);
/** Start the "Passive observation of Failure" algorithm for all
* records of the specified key. The specified address is */
void avahi_cache_start_poof(AvahiCache *c, AvahiKey *key, const AvahiAddress *a);
/* Stop a previously started POOF algorithm for a record. (Used for response suppresions records */
void avahi_cache_stop_poof(AvahiCache *c, AvahiRecord *record, const AvahiAddress *a);
void avahi_cache_flush(AvahiCache *c);
#endif
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