Format of APPC/PC "Get_Attributes" control block:
Offset	Size	Description	)
 00h 12 BYTEs	reserved
 0Ch	WORD	0700h (verb "Get_Attributes" or "MC_Get_Attributes")
 0Eh	BYTE	1 if MC_ (mapped conversation) form of verb
		0 if basic verb
 0Fh  5 BYTEs	reserved (0)
 14h	WORD	(big-endian) primary return code (see #03681)
 16h	DWORD	(big-endian) error code (see #03682)
 1Ah  8 BYTEs	(big-endian) TP_ID
 22h	DWORD	(big-endian) conversation ID
 26h  8 BYTEs	(big-endian) logical unit ID
 2Eh	BYTE	00h
 2Fh	BYTE	SYNC_LEVEL (0=none, 1=confirm)
 30h  8 BYTEs	(big-endian) mode name
 38h  8 BYTEs	(big-endian) own net name
 40h  8 BYTEs	(big-endian) own logical unit name
 48h  8 BYTEs	(big-endian) partner logical unit name
 50h 18 BYTEs	(counted string) partner's fully qualified logical unit name
 62h	BYTE	00h
 63h 11 BYTEs	(counted string) user ID