User guide

2: Freeway Client-Server Protocol
DC 900-1303C 39
No more nodes are available (11)
The server could not assign a node to the ICP on an Open Session request
because all available nodes are in use. A Close Session request may have
failed or the maximum number of ICP nodes (128) may have been reached.
Client Session ID (2 bytes)
When a client application requests the Freeway server to open a new session, the
Freeway server copies this field into its internal session table after the session is
successfully opened. This value is contained in the Open Session request packet
and is returned to the client application in all subsequent packets until the session
is closed. The Freeway server does not perform a range check on this field. How-
ever, the value of this field on the Close Session request must match the value used
in the Open Session request.
Freeway Session ID (2 bytes)
This field contains a unique ID from the Freeway server to the client application
after the server successfully opened a session at the request of the client. The client
application must use the returned value of this field for all of its subsequent pack-
ets to either the Freeway server or to the ICP and its protocol software. This field
is unique within a Freeway server only. The range of values for this field is 1 to
1024 (decimal).
Reserved (2 bytes)
This area is reserved for use by the Freeway server only.
Private (20 bytes)
This area is reserved for use by the Freeway server only.