3
Compaq FTAM Responder Operation
The Compaq responder receives an FTAM request from an initiating system, processes it, performs the appropriate action, and returns an FTAM response to the initiating system. It performs
This section explains the major components of the Compaq responder process and describes the flow of communication between an initiating system and the Compaq responder.
Responder Structure
The Compaq responder process can be broken down into several components that perform services for FTAM applications.
Figure
Figure
•The protocol state machine receives requests for new FTAM associations and for FTAM services, in the form of indications, from the TAPS process in the OSI/AS subsystem. It checks the FTAM requests for protocol errors, and if it finds none, takes the action necessary to perform the requested service. This action may require access to the file system through the responder VFS component.
Once any operations involving the file system are complete, the protocol state machine updates the state information for the association and sends a response to the remote FTAM initiator via the underlying OSI network.
•The virtual filestore (VFS) acts as an interface to the file system. Files accessible via the file system can also be accessed via the VFS component of the Compaq responder. The VFS is responsible for translating file structures and attributes into FTAM file structures and attributes, and vice versa. This translation is described further in Section 4 under
•The responder communicates with underlying Compaq OSI/AS processes through the OSI/AS API.
OSI/FTAM Responder
