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3.3.2.1.3 Client Call

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The client call is a data element that encapsulates the state associated with a client call. The client call is specified by a state machine with the following states.

State

Description

STATE_SEND_PDUS

The client is sending request PDUs of the call's [in] parameters to the server. This is the call's initial state.

STATE_DISPATCHED

The server has received all Request PDUs and is processing the request.

STATE_RECEIVE_PDU

The server is sending reply PDUs of the call's [out] parameters to the client.

STATE_COMPLETE

The call completed successfully. This is a terminal state.

STATE_FAULT

The call failed. This is a terminal state.

The client call states are depicted in the following diagram:

Client Call State Diagram

Figure 19: Client Call State Diagram

Client Call: The client call data structure maintains state and property information relating to a client call, as specified in [C706] section 9.3.4. Each client call contains the following properties:

  • Connection: As specified in section 3.3.1.5.5, each call MUST establish and maintain an affinity for a single connection. The mechanism of linking a call to a connection is implementation-dependent. The process for determining an appropriate connection is described in section 3.3.2.4.1.2.

  • Call_id: An unsigned 32-bit integer identifying the call, as defined in [C706] section 12.6.3.5.

  • Communication Time-out Value: A 32-bit integer value that specifies a time-out period in milliseconds for PDU transmission. This value is set by higher-level protocol in an implementation specific manner<108> prior to making a call. See section 3.3.2.2.2 for more information on how this affects PDU transmission. If not specified by the higher-layer protocol, the default value is MAX_INT.

  • Call State: An implementation-specific value that represents the call state from the preceding table.