-void cache_answer(struct interface *iface, uint8_t *base, int blen,
- char *name, struct dns_answer *a, uint8_t *rdata, int flush);
+void cache_answer(struct interface *iface, struct sockaddr *from, uint8_t *base,
+ int blen, char *name, struct dns_answer *a, uint8_t *rdata,
+ int flush);