char *name, struct dns_answer *a, uint8_t *rdata);
extern int cache_host_is_known(char *record);
extern char* cache_lookup_name(const char *key);
char *name, struct dns_answer *a, uint8_t *rdata);
extern int cache_host_is_known(char *record);
extern char* cache_lookup_name(const char *key);