+int (*lwr_receive_getc)(unsigned) = stdin_getc;
+uschar * (*lwr_receive_getbuf)(unsigned *) = NULL;
+int (*lwr_receive_ungetc)(int) = stdin_ungetc;
+int (*receive_getc)(unsigned) = stdin_getc;
+uschar * (*receive_getbuf)(unsigned *) = NULL;
+void (*receive_get_cache)(void)= NULL;