extern uschar * tls_cert_fprt_sha256(void *);
extern int tls_client_start(int, host_item *, address_item *,
- void *);
+ transport_instance *);
extern void tls_close(BOOL, BOOL);
extern int tls_export_cert(uschar *, size_t, void *);
extern int tls_feof(void);
extern void sigalrm_handler(int);
extern BOOL smtp_buffered(void);
extern void smtp_closedown(uschar *);
-extern int smtp_connect(host_item *, int, int, uschar *, int, BOOL, const uschar *);
+extern int smtp_connect(host_item *, int, int, uschar *, int, BOOL, const uschar *
+#ifdef EXPERIMENTAL_TPDA
+ , uschar *
+#endif
+ );
extern int smtp_feof(void);
extern int smtp_ferror(void);
extern uschar *smtp_get_connection_info(void);