extern int host_item_get_port(host_item *);
extern void host_mask(int, int *, int);
extern int host_name_lookup(void);
-extern int host_nmtoa(int, int *, int, uschar *, int);
+extern int host_nmtoa(int, const int *, int, uschar *, int);
extern uschar *host_ntoa(int, const void *, uschar *, int *);
extern int host_scan_for_local_hosts(host_item *, host_item **, BOOL *);
extern const pcre2_code *regex_compile(const uschar *, mcs_flags, uschar **,
pcre2_compile_context *);
extern const pcre2_code *regex_must_compile(const uschar *, mcs_flags, BOOL);
-extern void retry_add_item(address_item *, uschar *, int);
+
+extern void retry_add_item(address_item *, const uschar *, int);
extern BOOL retry_check_address(const uschar *, host_item *, uschar *, BOOL,
- uschar **, uschar **);
+ const uschar **, const uschar **);
extern retry_config *retry_find_config(const uschar *, const uschar *, int, int);
-extern BOOL retry_ultimate_address_timeout(uschar *, const uschar *,
+extern const uschar *retry_host_key_build(const host_item *, BOOL,
+ const uschar *);
+extern BOOL retry_ultimate_address_timeout(const uschar *, const uschar *,
dbdata_retry *, time_t);
extern void retry_update(address_item **, address_item **, address_item **);
extern const uschar *rewrite_address(const uschar *, BOOL, BOOL, rewrite_rule *, int);