Edit

Share via

Status-Control(...) ACKLUA

  • Article

The Status-Control(...) ACKLUA message is for logical unit application (LUA) applications only. It flows from the node to the application, and is used with a primary logical unit (PLU) connection.

Syntax

  
struct Status-Control(...) ACKLUA {  
    PTRBFHDR  nxtqptr;  
    PTRBFELT  hdreptr;  
    CHAR      numelts;  
    CHAR      msgtype;  
    CHAR      srcl;  
    CHAR      srcp;  
    INTEGER   srci;  
    CHAR      destl;  
    CHAR      destp;  
    INTEGER   desti;  
    CHAR      sfhdr.stctlhdr.ctlstat;  
    CHAR      sfhdr.stctlhdr.ctlqual;  
    CHAR      sfhdr.stctlhdr.ctltype  
    CHAR      sfhdr.stctlhdr.ctlack;  
    CHAR      sfhdr.stctlhdr.ctlflag1;  
    CHAR      sfhdr.stctlhdr.ctlflag2;  
    INTEGER   sfhdr.stctlhdr.ctlnumb1;  
    INTEGER   sfhdr.stctlhdr.ctlnumb2;  
    INTEGER   sfhdr.stctlhdr.ctlmsgk;  
};

Members

nxtqptr
Pointer to next buffer header.

hdreptr
Pointer to buffer element (NIL).

numelts
Number of buffer elements (0x00).

msgtype
Message type STATFMI (0x21).

srcl
Source locality.

srcp
Source partner.

srci
Source index.

destl
Destination locality.

destp
Destination partner.

desti
Destination index.

sfhdr.stctlhdr.ctlstat
Status type STCNTRL (0x02).

sfhdr.stctlhdr.ctlqual
Control qualifier ACKLUA (0x05).

sfhdr.stctlhdr.ctltype
Control type.

sfhdr.stctlhdr.ctlack
Reserved.

sfhdr.stctlhdr.ctlflag1
Application flag 1.

sfhdr.stctlhdr.ctlflag2
Application flag 2.

sfhdr.stctlhdr.ctlnumb1
Code 1.

sfhdr.stctlhdr.ctlnumb2
Code 2.

sfhdr.stctlhdr.ctlmsgk
Message key used for the SNA sequence number. (For more information, see Remarks.)

Remarks

  • The Status-Control() ACKLUA message consists of a buffer header only. There is no buffer element.

  • The application flags and the code 1 and code 2 fields are undefined and should not be used.

  • The message key field gives the sequence number from the transmission header of the inbound data message to which this is an acknowledgment.

  • For a summary of Status-Control control type codes, see the table in Status-Control Message.