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