Internet Direct (Indy) Version 9.0.2 Beta
TWKSRecord.BitMap
Represents bits that indicate port usage for the Well Known Service.

property BitMap [index: integer]: Byte;
Description
BitMap is a read-only Byte property that provides indexed access to the port numbers used on the Host at the specified Address. BitMap is a variable length storage area that can be accessed using a zero-based index into the individual bits used to signify the port numbers allowed for the Protocol of the Well Known Service.

The appropriate values and mnemonics for ports numbers are specified in RFC 1010. For example, if Protocol is the value for TCP, the 26th bit corresponds to TCP port 25 (SMTP). If this bit is set, a SMTP server should be listening on TCP port 25; if zero, SMTP service is not supported on the specified address.