User guide

2: Freeway Client-Server Protocol

DC 900-1303C 27

Open Session

This is the ﬁrst TSI data packet that a client should send for a new Freeway session. This

packet requests the Freeway server to open a session to a speciﬁc ICP, and speciﬁes a cli-

ent session ID to associate with this session. The ICP is speciﬁed as a string and must

match one of the device names speciﬁed in the Freeway server boot conﬁguration ﬁle

(see the Freeway User Guide). If the request is valid, the Freeway server reports the Free-

way-assigned session ID and the Freeway software version in the Open Session

Response packet. Otherwise, the response contains an error code describing the reason

for rejection.

Open Session Response

This packet is sent in response to the Open Session control packet. It reports acceptance

or rejection of the request, the Freeway-assigned session ID, and the Freeway software

version.

Close Session

This is the last TSI data packet that a client should send for an open Freeway session.

This control packet requests the Freeway server to close an open session to an ICP; it

speciﬁes the Freeway-assigned session ID and the client session ID sent to the server in

the Open Session request. The server reports acceptance or rejection of the request in

the Close Session Response packet.

Close Session Response

This packet is sent in response to the Close Session control packet. It reports acceptance

or rejection of the request.

Set Time

Not implemented at this time.