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 #include "interface.h"
  23
  24 struct cache_service {
  25         struct avl_node avl;
  26
  27         const char *entry;
  28         const char *host;
  29         uint32_t ttl;
  30         time_t time;
  31         struct interface *iface;
  32         int refresh;
  33 };
  34
  35 struct cache_record {
  36         struct avl_node avl;
  37
  38         const char *record;
  39         uint16_t type;
  40         uint32_t ttl;
  41         int port;
  42         const char *txt;
  43         const uint8_t *rdata;
  44         uint16_t rdlength;
  45         time_t time;
  46         struct interface *iface;
  47 };
  48
  49 extern struct avl_tree services;
  50
  51 int cache_init(void);
  52 void cache_scan(void);
  53 void cache_cleanup(struct interface *iface);
  54 void cache_answer(struct interface *iface, uint8_t *base, int blen,
  55                   char *name, struct dns_answer *a, uint8_t *rdata, int flush);
  56 int cache_host_is_known(char *record);
  57 char *cache_lookup_name(const char *key);
  58 void cache_dump_records(struct blob_buf *buf, const char *name);
  59 void cache_dump_recursive(struct blob_buf *b, const char *name, uint16_t type, struct interface *iface);
  60
  61 #endif