NIB (ISTDNIB)

Figure 1. Format of the NIB

The diagram shows the format of the control block NIB. The corresponding displacements are from 0 to 64 in decimal.

For ISTDVCHR, see Table 1. For ISTDPROC, see Table 1. For ISTDBIND, see Figure 1 for DSECT pointed to by BNDAREA.

Table 1. NIB DSECT (ISTDNIB)
Parameter on RPL-based macro	DSECT label	DSECT EQU label	Field or EQU value	For EQU: Meaning when bit setting on For DS: Meaning when byte value set	Dec offset	Hex offset
AFFIN	NIBFLG0	NIBAFFIN	X'10'	Indicates (on SETLOGON) application owns all affinities	01	01
BNDAREA	NIBNDAR	—	A	BIND area address	56	38
MTSAREA	NIBMTSAR	—	A	MTS area address Note: MTSAREA and BNDAREA are mutually exclusive.	56	38
ASDPAREA	NIBFLG1	NIBASDP	X'01'	Indicates application-supplied dial parameters	40	28
ASDPAREA	NIBASDPA	—	A	Address of application-supplied dial parameters	60	3C
CID	NIBCID	—	XL4	Communication ID	4	4
CON	NIBFLG1	NIBCON	X'40'	CON=YES	40	28
DEVCHAR	NIBDEVCH	—	XL8	(See ISTDVCHR, Table 1)	28	1C
EXLST	NIBEXLST	—	A	EXLST address	44	2C
GNAME	NIBGENN	—	CL8	Generic name	48	30
LISTEND	NIBFLG1	NIBLAST	X'80'	LISTEND=NO	40	28
LOGMODE/ GNAME	NIBLMODE/ NIBGENN	—	CL8	LOGMODE value	48	30
CINIT request canceled	NIBFLG1	NIBNACLQ	X'08'	If OPNDST OPTCD=ACCEPT failed, the pending CINIT request has been canceled.	40	28
LUAFFIN	NIBFLGO	NIBAFFIN NIBLAFFN	X'12'	Indicates (on OPNDST or OPNSEC) the application owns the affinity for this LU.
			X'02'	Indicates (on OPNDST or OPNSEC) the application does not own the affinity for this LU.
MODE	NIBMODE	—	CL8	MODE value	20	14
NAME or PROC= STOKEN	NIBSYM or NIBSTKN	—	CL8	NAME value or STOKEN	12	C
NIBLEN	NIBLEN	—	X	NIB length	3	3
PROC	NIBPROCD	—	XL4	(See ISTDPROC, Table 1)	36	24
RESPLIM	NIBLIMIT	—	XL2	RESPLIM value	42	2A
SDT	NIBFLG1	NIBSDAPP	X'20'	SDT=APPL	40	28
USERFLD	NIBUSER	—	XL4	USERFLD value	8	8
—	NIBFLG0	NIBNNAMS	X'80'	Application network name used	1	1
	NIBFLG2	NIBCSEL	X'80'	Indicates selective encryption was used for session	41	29
	NIBFLG2	NIBCREQ	X'40'	Indicates required encryption was used for session	41	29
	NIBFLG2	NIBPSPLU	X'20'	Indicates that the application is a PLU	41	29
	NIBFLG2	NIBPSDFS	X'10'	DFSYN data mode setting	41	29
	NIBFLG2	NIBPSDFA	X'08'	DFASY data mode setting	41	29
	NIBFLG2	NIBPSRSP	X'04'	RESP data mode setting	41	29
	NIBFLG2	NIBURCTS	X'02'	Reserved	41	29
	NIBFLG2	NIBSLWRK	X'80'	SIMLOGON successful for this NIB	41	29
–	NIBRPARM	–	A	Restore parameter list address	60	3C
		NIBRBNDP	A	Pointer to BIND information	0	0
		NIBRC29P	A	Pointer to control vector hex 29 information	4	4
		NIBRSQPP	A	Pointer to session qualifier pair	8	8
		NIBRMDNP	A	Pointer to mode name	8	8
		NIBRSIDP	A	Pointer to session instance identifier	12	C
		NIBRFM5P	A	Pointer to FMH5	16	10
		NIBRBIDP	A	Pointer to BID	20	14
		NIBRBISP	A	Pointer to BIS	24	18
–	NIBUCVA	--	A	User CV pointer	60	3C
		NIBVECL	HL2	Length of vector including this field	0	0
		NIBVEC	0X	Control vector data	2	2
Note: Certain fields marked “Reserved” can be set to nonzero values; however, no reserved fields should be examined by an application program.