Open(PLU) OK Response

The Open(PLU) OK Response message flows from the application to the node. It is used with a PLU connection.

struct Open(PLU) OK Response {
    PTRBFHDR  nxtqptr;
    PTRBFELT  hdreptr;
    CHAR      numelts;
    CHAR      msgtype;
    CHAR      srcl;
    CHAR      srcp;
    INTEGER   srci;
    CHAR      destl;
    CHAR      destp;
    INTEGER   desti;
    CHAR      ophdr.openqual;
    CHAR      ophdr.opentype;
    CHAR      ophdr.appltype;
    CHAR      ophdr.opluno;
    INTEGER   ophdr.opresid;
    INTEGER   ophdr.icreditr;
    INTEGER   ophdr.icredits;
    CHAR      ophdr.opninfo1;
}; 
 

Element 1

struct Open(PLU) OK Response {
    PTRBFELT hdreptr->elteptr;
    INTEGER hdreptr->startd;
    INTEGER hdreptr->endd;
    CHAR hdreptr->trpad;
    CHAR[268] hdreptr->dataru;
}; 
 

Element 2

struct Open(PLU) OK Response {
    PTRBFELT   hdreptr->elteptr->elteptr;
    INTEGER    hdreptr->elteptr->startd;
    INTEGER    hdreptr->elteptr->endd;
    CHAR       hdreptr->elteptr->trpad;
    CHAR[268]  hdreptr->elteptr->dataru;
}; 
 

Members

nxtqptr

Pointer to next buffer header.

hdreptr

Pointer to first buffer element.

numelts

Number of buffer elements (0x02).

msgtype

Message type OPENMSG (0x01).

srcl

Source locality.

srcp

Source partner.

srci

Source index.

destl

Destination locality.

destp

Destination partner.

desti

Destination index.

ophdr.openqual

Open qualifier RSPOK (0x02).

ophdr.opentype

Open type LUSEC (0x02).

ophdr.appltype

Application program interface type

0x02 (FMI application)

ophdr.opluno

Logical unit number.

ophdr.opresid

Resource identifier.

ophdr.icreditr

Initial credit for flow from application to local node: zero.

ophdr.icredits

Initial credit for flow from local node to application; only valid if APPLPAC = 0x01.

ophdr.opninfo1

Negotiable bind indicator

Bind is not negotiable (0x00)
Bind is negotiable (0x01)

Element 1

hdreptr–>elteptr

Pointer to buffer element.

hdreptr–>startd

Start of data in this buffer element (1).

hdreptr–>endd

End of data in this buffer element.

hdreptr–>trpad

Reserved.

hdreptr–>dataru

Data RU, as follows:

dataru[0–9]

Source name.

dataru[10–19]

Destination name.

dataru[20]

Segment delivery option

Do not deliver RU segments (0x00)
Deliver RU segments (0x01)

dataru[21]

Application pacing option

No application pacing (0x00)
Application pacing (0x01)

dataru[22]

Application cancel option: Cancel is generated by

local node (0x00)
application (0x01)

dataru[23]

Application transaction numbers option: transaction numbers are

not supported by application (0x00)
supported by application (0x01)

dataru[24]

BIND table index:

BIND_TABLE_INDEX_PRT (1) (printer session)
BIND_TABLE_INDEX_CRT (2) (display session)

Element 2

hdreptr–>elteptr–>elteptr

Pointer to buffer element (NIL).

hdreptr–>elteptr–>startd

Start of data in this buffer element (13).

hdreptr–>elteptr–>endd

End of data in this buffer element.

hdreptr–>elteptr–>trpad

Reserved.

hdreptr–>elteptr–>dataru

Data RU, as follows:

dataru[13]

The BIND RU.

Remarks

• The Open(PLU) OK Response message consists of a buffer header, an initial element containing the source and destination names and CICB, followed by elements containing the BIND RU received from the host.
• The application should reflect the source and destination LPIs and the source and destination names from the Open(PLU) Request and must supply the I part of the source LPI.
• The fields from segment delivery option to bind table index (in the first element) are referred to in the text as the PLU connection information control block (CICB). See Opening the PLU Connection for further information on the contents of the CICB.
• The BIND RU can be up to 256 bytes in length.
• For LUA, the BIND RU is not preceded by its TH and RH (contrast with the Open(PLU) Request, where the TH and RH are included).
• As in the Open(PLU) Request, the icredits value is in units of chunks if chunking is being used.