User guide

36 DC 900-1303C
Freeway Client-Server Interface Control Document
Type (2 bytes)
This field is equivalent to the
usFWType field in the DLI_OPT_ARGS structure. (See
the Freeway Data Link Interface Reference Guide for a detailed description of the
DLI_OPT_ARGS structure.) The Type field indicates the type of packet. There are
two valid types:
Control (1)
This type is for session control requests/responses and all other packets that
will not be sent to the ICP.
Data (2)
This type is for packets that are transferred to and from the ICP.
Command/Response (2 bytes)
This field is equivalent to the
usFWCommand in the DLI_OPT_ARGS structure. The
purpose of the Command field is to request specific services from the Freeway
server. If the packet is a control packet, the Command field may be one of the fol-
lowing:
Open session request or response (1)
Close session request or response (2)
Set time request (3)
Get time request (4)
Get version request or response (5)
If the packet is a data packet, the Command field may be one of the following:
Write to ICP request (1)
Expedite write to ICP request (2)