88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/*************************************************************************
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*
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* Copyright (C) 2018-2020 Ruilin Peng (Nick) <pymumu@gmail.com>.
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*
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* smartdns is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* smartdns is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _SMARTDNS_CACHE_H
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#define _SMARTDNS_CACHE_H
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#include "atomic.h"
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#include "dns.h"
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#include "hash.h"
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#include "hashtable.h"
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#include "list.h"
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#include <stdlib.h>
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#include <time.h>
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#ifdef __cpluscplus
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extern "C" {
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#endif
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#define DNS_CACHE_TTL_MIN 30
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struct dns_cache {
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struct hlist_node node;
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struct list_head list;
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struct list_head check_list;
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atomic_t ref;
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char domain[DNS_MAX_CNAME_LEN];
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char cname[DNS_MAX_CNAME_LEN];
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unsigned int cname_ttl;
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unsigned int ttl;
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int speed;
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atomic_t hitnum;
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int hitnum_update_add;
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int del_pending;
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time_t insert_time;
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dns_type_t qtype;
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union {
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unsigned char ipv4_addr[DNS_RR_A_LEN];
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unsigned char ipv6_addr[DNS_RR_AAAA_LEN];
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unsigned char addr[0];
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};
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};
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int dns_cache_init(int size, int enable_inactive, int inactive_list_expired);
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int dns_cache_replace(char *domain, char *cname, int cname_ttl, int ttl, dns_type_t qtype, unsigned char *addr, int addr_len, int speed);
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int dns_cache_insert(char *domain, char *cname, int cname_ttl, int ttl, dns_type_t qtype, unsigned char *addr, int addr_len, int speed);
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struct dns_cache *dns_cache_lookup(char *domain, dns_type_t qtype);
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void dns_cache_delete(struct dns_cache *dns_cache);
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void dns_cache_get(struct dns_cache *dns_cache);
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void dns_cache_release(struct dns_cache *dns_cache);
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int dns_cache_hitnum_dec_get(struct dns_cache *dns_cache);
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void dns_cache_update(struct dns_cache *dns_cache);
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typedef void dns_cache_preinvalid_callback(struct dns_cache *dns_cache);
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void dns_cache_invalidate(dns_cache_preinvalid_callback callback, int ttl_pre);
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int dns_cache_get_ttl(struct dns_cache *dns_cache);
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void dns_cache_destroy(void);
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#ifdef __cpluscplus
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}
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#endif
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#endif // !_SMARTDNS_CACHE_H
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