int res_search(const char *, int, int, unsigned char *, int);
int res_mkquery(int, const char *, int, int, char *, int, struct rrec *, char *, int);
int res_send(const char *, int, char *, int);
-int dn_comp(unsigned char *, unsigned char *, int, unsigned char **, unsigned char *, unsigned char **);
+int dn_comp(const char *, unsigned char *, int, unsigned char **, unsigned char **);
int dn_expand(const unsigned char *, const unsigned char *, const unsigned char *, char *, int);
int dn_skipname(const unsigned char *, const unsigned char *);