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 #include <libubox/blob.h>
  20
  21 #include "dns.h"
  22
  23 struct cache_entry {
  24         struct avl_node avl;
  25
  26         const char *entry;
  27         const char *host;
  28         uint32_t ttl;
  29         time_t time;
  30 };
  31
  32 struct cache_record {
  33         struct avl_node avl;
  34
  35         const char *record;
  36         uint16_t type;
  37         uint32_t ttl;
  38         int port;
  39         const char *txt;
  40         const uint8_t *rdata;
  41         uint16_t rdlength;
  42         time_t time;
  43 };
  44
  45 extern struct avl_tree entries;
  46
  47 int cache_init(void);
  48 void cache_scan(void);
  49 void cache_cleanup(void);
  50 void cache_answer(struct interface *iface, uint8_t *base, int blen,
  51                   char *name, struct dns_answer *a, uint8_t *rdata, int flush);
  52 int cache_host_is_known(char *record);
  53 char *cache_lookup_name(const char *key);
  54 void cache_dump_records(struct blob_buf *buf, const char *name);
  55
  56 #endif