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 struct sockaddr_storage from; 48 int refresh; 49 }; 50 51 extern struct avl_tree services; 52 extern struct avl_tree records; 53 54 int cache_init(void); 55 void cache_update(void); 56 void cache_cleanup(struct interface *iface); 57 void cache_answer(struct interface *iface, struct sockaddr *from, uint8_t *base, 58 int blen, char *name, struct dns_answer *a, uint8_t *rdata, 59 int flush); 60 int cache_host_is_known(char *record); 61 void cache_dump_records(struct blob_buf *buf, const char *name, int array, 62 const char **hostname); 63 void cache_dump_recursive(struct blob_buf *b, const char *name, uint16_t type, struct interface *iface); 64 65 #endif 66
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