OSI/AS SCF Reference Manual

Table Of Contents
OSI/AS Trace Facility
OSI/AS SCF Reference Manual424121-001
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L5 PROVL5 Send TSDU
DCB Addr
an internal field that shows the address of the I/O buffer that just completed.
Count Transferred
shows the number of bytes written or read.
FS Error
shows the Completion Guardian file-system error.
MCW
shows the Message Control Word (MCW). The MCW is in the first word of the data
buffer returned by transport. The data buffer will contain new data if the operation is
a read or writeread, or it will contain the data just written. In this example, the
MCW can have the following values:
User Information
shows unformatted user data.
L5 PROV—L5 Send TSDU
This trace record shows a session service user request formatted as a transport service
data unit (TSDU) about to be written to transport. A TSDU contains one or more session
protocol data units (SPDU). SPDUs are protocol units exchanged with the remote
session service provider and may be visible (possibly in fragments) on the wire via a
datascope. To see the encoded form of the TSDU, set DETAIL ON.
Value Meaning
5read
6write
10 loopback read
11 loopback write
Value Meaning
%H0001 more-data
Note: If this is a read completion and if the incoming TSDU contains part of a DT or
TD SPDU, the TSDU data will be sent to the session service user in fragments as it is
read from transport. If the TSDU contains a different type of SPDU, the whole SPDU
will be read in and assembled before being passed to the session service user. %H0001
is also set when writing part of a larger TSDU.
%H0000 This completion record contains the last block of data for this TSDU.