Reference Guide

ZCOM Tables and Data Structures
Node Entries Table
Chapter 3 55
Node Entries Table
The Node Entries table contains information about the remote ZCOM
systems that communicate with the local ZCOM subsystem. Each
Local-Node and Remote-Node definition in the TTGEN configuration file
occupy one entry in the table. Each entry structure is 392 bytes long and
has the format shown in Table 3-4.
NODE_NUM - Node number
This field contains a unique node number that identifies the entry.
TIMEOUT - Default timeout value for this node
This field contains timeout in seconds for requests sent to this remote
node. Most remote ZCOM requests (e.g. ZOPEN, ZTIMR, etc) require a
definite response from the remote ZCOM subsystem. If the response is
not received within the timeout period specified by this field, error
ZENTOUT (-23) is returned to the application program. This field is
initialized by TTGEN with the timeout value specified in a Remote-Node
definition. This field is zero for a local node entry.
Table 3-4 Node Entries Table
Field Name Field Description Field Type
Size
(Bytes)
node_num ZCOM system node number uns.short 2
timeout Default timeout value for this node uns.short 2
flags Node status and internal flags uns.int 4
stats Statistics for this node struct 16
ndshzrvrs List of node status event receivers pointer 8
nhost Number of hosts in the host array uns.short 2
spare1 Reserved, not used uns.short 2
spare2 Reserved, not used int 4
host Host link information struct [4] 4*88