HP 800 HP DLPI Programmer's Guide - Page 41

Figure 1-13 Introduction to DLPI DLPI Services INCON_PEND state if there are more outstanding connect indications; otherwise, it will be left in the IDLE state. The data stream will be in the DATAXFER state. The normal sequence of messages for obtaining a token is illustrated in Figure 1-13. Message Flow: Token Retrieval DL_TOKEN request DL_TOKEN acknowledge In the typical connection establishment scenario, the callee processes one connect indication at a time, accepting the connection on another stream. Once the user responds to the current connect indication, the next connect indication (if any) can be processed. DLPI also enables the callee to multi-thread incoming connect indications. The user can receive multiple connect indications before responding to any of them. This enables the DLS user to establish priority schemes on incoming connect requests. Connection Establishment Rejection In certain situations, the connection establishment request cannot be completed. The following describes the occasions under which DL_DISCONNECT_REQ and DL_DISCONNECT_IND primitives will flow during connection establishment, causing the connect request to be aborted. Chapter 1 41