OSI/TS Configuration and Management Manual

NonStop Kernel File-System Interface

OSI/TS Configuration and Management Manual—424831-001

7-38

WRITE Procedure or WRITEREAD Procedure

You must use a WRITE or a WRITEREAD call if you wish to transfer data

during the release phase. Issue a call similar to one of the following:

Place a 16-bit MCW in the first two octets of the write buffer. OSI/TS

interprets the MCW as follows:

You can place up to 64 octets of data in the buffer after the MCW. Figure 7-17

shows the contents of the buffer.

When the OSI/TS subsystem receives the WRITE or WRITEREAD call, it

transmits a DR-TPDU. It completes the request when it receives a DC-TPDU.

If there are outstanding requests against the subdevice when you initiate

connection release, OSI/TS completes them by issuing file-system error 140.

Remote Release

In classes 1, 2, 3, and 4, when OSI/TS receives a DR-TPDU, it transmits a DC-

TPDU and an N-DISCONNECT request. A transport connection is also released

if OSI/TS receives an ER-TPDU from the remote peer. In either case, OSI/TS

signals your application by completing all outstanding requests by issuing file-

system error 140. Issue SETPARAM 10 to retrieve the cause of the disconnect

and any data that might have arrived with the disconnect request.

CALL WRITE ( filenum, buffer, write-count );

CALL WRITEREAD ( filenum, buffer, write-count );

Bit MCW Value Meaning

0-3 0 Reserved

4 1 Release request

5-15 0 Reserved

Figure 7-16. WRITE or WRITEREAD Buffer: Connection Release

716CDT .CDD

Octet 1

Octet 0

Octet 2

Through

Octet n

MCW

Data

0 0 0 1 0