Status-Control(...) Request

The Status-Control(...) Request message flows from the node to the application and from the application to the node. It is used with a PLU connection.

struct Status-Control(...) Request {
    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.stctlthdr.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;
}; 
 

LUA only (see Remarks):
Element

struct Status-Control(...) Request {
    PTRBFELT   hdreptr->elteptr;
    INTEGER    hdreptr->startd;
    INTEGER    hdreptr->endd;
    CHAR       hdreptr->trpad;
    CHAR[268]  hdreptr->dataru;
}; 
 

Members

nxtqptr

Pointer to next buffer header.

hdreptr

Pointer to buffer element (NIL if not using LUA).

numelts

Number of buffer elements (0x00 if not using LUA).

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 (0x01).

sfhdr.stctlhdr.ctltype

Control type.

sfhdr.stctlhdr.ctlack

Acknowledgment required indicator

No acknowledgment required (0x00)
Acknowledgment required (0x01)

sfhdr.stctlhdr.ctlflag1

Application flag 1.

sfhdr.stctlhdr.ctlflag2

Application flag 2 (see STSN).

sfhdr.stctlhdr.ctlnumb1

Code 1.

sfhdr.stctlhdr.ctlnumb2

Code 2.

sfhdr.stctlhdr.ctlmsgk

Message key.

LUA only (see Remarks):
Element

hdreptr–>elteptr

Pointer to buffer element (NIL).

hdreptr–>startd

Start of data in this buffer element

13 or
10 for second and subsequent segments of outbound segmented RUs

hdreptr–>endd

End of data in this buffer element.

hdreptr–>trpad

Reserved.

hdreptr–>dataru

Data RU.

Remarks

• If the application is using the LUA variant of the FMI (see FMI Concepts), the TH, RH, and RU are included in the data element, and the startd field points to the TH. The ctlflag1 and ctlflag2 bytes are not defined and should not be used; the appropriate values from the data should be used instead.
• If the application is not using the LUA variant of the FMI, the message consists of a buffer header only; there is no buffer element.
• See the table in Status-Control Message for a summary of Status-Control control type codes.
• The code 1 and code 2 fields apply only for Status-Control LUSTAT, SIGNAL, and STSN messages.
• The application flag byte 2 is used for the Status-Control STSN control byte (see Recovery).