cache.h

   1 /*
   2  * Copyright (C) 2014 John Crispin <blogic@openwrt.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU Lesser General Public License version 2.1
   6  * as published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #ifndef _CACHE_H__
  15 #define _CACHE_H__
  16
  17 #include <libubox/avl.h>
  18 #include <libubox/list.h>
  19
  20 #include "dns.h"
  21
  22 struct cache_entry {
  23         struct avl_node avl;
  24
  25         const char *entry;
  26         const char *host;
  27         uint32_t ttl;
  28         time_t time;
  29 };
  30
  31 struct cache_record {
  32         struct avl_node avl;
  33
  34         const char *record;
  35         uint16_t type;
  36         uint32_t ttl;
  37         int port;
  38         const char *txt;
  39         const uint8_t *rdata;
  40         uint16_t rdlength;
  41         time_t time;
  42 };
  43
  44 extern struct avl_tree records, entries;
  45
  46 extern int cache_init(void);
  47 extern void cache_scan(void);
  48 extern void cache_cleanup(void);
  49 extern void cache_answer(struct interface *iface, uint8_t *base, int blen,
  50                 char *name, struct dns_answer *a, uint8_t *rdata);
  51 extern int cache_host_is_known(char *record);
  52 extern char* cache_lookup_name(const char *key);
  53
  54 #endif