Client connection-initiated exchange with agreement for client connection using security parameters

Client connection-initiated exchange with agreement for client connection using security parameters. The exchange follows the example in Figure 79 to when the sender is invoked with MQXR_SEC_MSG. and responds with MQXCC_OK. At this point the sender exit is invoked with MQXR_SEC_PARMS, then the receiver exit is also invoked with MQXR_SEC_PARMS before message transfer begins.