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cache: support persist cache when restart smartdns

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This commit is contained in:
Nick Peng
2020-09-05 12:55:30 +08:00
parent 2b81fffb7e
commit 0b45da29c7
13 changed files with 447 additions and 80 deletions
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51
src/dns_cache.h
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@@ -32,12 +32,21 @@ extern "C" {
#endif
#define DNS_CACHE_TTL_MIN 30
#define DNS_CACHE_VERSION_LEN 32
#define MAGIC_NUMBER 0x6548634163536e44
#define MAGIC_CACHE_DATA 0x44615461
enum CACHE_TYPE {
CACHE_TYPE_NONE,
CACHE_TYPE_ADDR,
CACHE_TYPE_PACKET,
};
enum CACHE_RECORD_TYPE {
CACHE_RECORD_TYPE_ACTIVE,
CACHE_RECORD_TYPE_INACTIVE,
};
struct dns_cache_data_head {
uint32_t cache_flag;
enum CACHE_TYPE cache_type;
@@ -67,32 +76,48 @@ struct dns_cache_packet {
unsigned char data[0];
};
struct dns_cache_info {
char domain[DNS_MAX_CNAME_LEN];
int ttl;
int hitnum;
int speed;
int hitnum_update_add;
time_t insert_time;
dns_type_t qtype;
};
struct dns_cache_record {
uint32_t magic;
enum CACHE_RECORD_TYPE type;
struct dns_cache_info info;
};
struct dns_cache {
struct hlist_node node;
struct list_head list;
struct list_head check_list;
atomic_t ref;
atomic_t hitnum;
char domain[DNS_MAX_CNAME_LEN];
int ttl;
int speed;
int hitnum_update_add;
atomic_t ref;
int del_pending;
time_t insert_time;
dns_type_t qtype;
struct dns_cache_info info;
struct dns_cache_data *cache_data;
};
struct dns_cache_file {
uint64_t magic;
char version[DNS_CACHE_VERSION_LEN];
uint32_t cache_number;
};
enum CACHE_TYPE dns_cache_data_type(struct dns_cache_data *cache_data);
uint32_t dns_cache_get_cache_flag(struct dns_cache_data *cache_data);
void dns_cache_data_free(struct dns_cache_data *data);
struct dns_cache_data *dns_cache_new_data_addr(uint32_t cache_flag, char *cname, int cname_ttl, unsigned char *addr, int addr_len);
struct dns_cache_data *dns_cache_new_data_addr(uint32_t cache_flag, char *cname, int cname_ttl, unsigned char *addr,
int addr_len);
struct dns_cache_data *dns_cache_new_data_packet(uint32_t cache_flag, void *packet, size_t packet_len);
@@ -124,6 +149,10 @@ struct dns_cache_data *dns_cache_get_data(struct dns_cache *dns_cache);
void dns_cache_destroy(void);
int dns_cache_load(const char *file);
int dns_cache_save(const char *file);
#ifdef __cpluscplus
}
#endif