[cifs-protocol] DRS option bits

Edgar Olougouna edgaro at microsoft.com
Tue Oct 13 07:22:33 MDT 2009

Good morning Tridge,

Thanks for your question regarding DRS option bits. I have created the case number SRX091013600034 for this inquiry.
One of my colleagues will take ownership of the case and contact you soon.

Best regards,


-----Original Message-----
From: tridge at samba.org [mailto:tridge at samba.org] 
Sent: Tuesday, October 13, 2009 6:23 AM
To: Interoperability Documentation Help
Cc: cifs-protocol at samba.org; pfif at tridgell.net
Subject: CAR: DRS option bits


I'm still working on our DRSR DsGetNCChanges implementation. One
puzzle I've hit is related to MS-DRSR 5.39 DRS Options. I'm receiving
replication requests from a w2k8-R2 machine with the replication flags
(ulFlags) set to 0x00200074. The bit 0x00200000 is one of the 'X' bits
in section 5.39, so I guess it is either an undocumented bit or the
bitfield is incorrectly labelled in the docs.

Given the complexity of decoding WSPP bitfields, here is my decode of
it for you to check:

		DRSUAPI_DRS_ASYNC_OP                  = 0x00000001,
		DRSUAPI_DRS_GETCHG_CHECK              = 0x00000002,
		DRSUAPI_DRS_ADD_REF                   = 0x00000004,
		DRSUAPI_DRS_SYNC_ALL                  = 0x00000008,
		DRSUAPI_DRS_DEL_REF                   = 0x00000008,
		DRSUAPI_DRS_WRIT_REP                  = 0x00000010,
		DRSUAPI_DRS_INIT_SYNC                 = 0x00000020,
		DRSUAPI_DRS_PER_SYNC                  = 0x00000040,
		DRSUAPI_DRS_MAIL_REP                  = 0x00000080,
		DRSUAPI_DRS_ASYNC_REP                 = 0x00000100,
		DRSUAPI_DRS_IGNORE_ERROR              = 0x00000100,
		DRSUAPI_DRS_TWOWAY_SYNC               = 0x00000200,
		DRSUAPI_DRS_CRITICAL_ONLY             = 0x00000400,
		DRSUAPI_DRS_GET_ANC                   = 0x00000800,
		DRSUAPI_DRS_GET_NC_SIZE               = 0x00001000,
		DRSUAPI_DRS_LOCAL_ONLY                = 0x00001000,
		DRSUAPI_DRS_SYNC_BYNAME               = 0x00004000,
		DRSUAPI_DRS_REF_OK                    = 0x00004000,
		DRSUAPI_DRS_FULL_SYNC_NOW             = 0x00008000,
		DRSUAPI_DRS_NO_SOURCE                 = 0x00008000,
		DRSUAPI_DRS_FULL_SYNC_PACKET          = 0x00020000,
		DRSUAPI_DRS_REF_GCSPN                 = 0x00100000,
		DRSUAPI_DRS_SYNC_FORCED               = 0x02000000,
		DRSUAPI_DRS_DISABLE_AUTO_SYNC         = 0x04000000,
		DRSUAPI_DRS_USE_COMPRESSION           = 0x10000000,
		DRSUAPI_DRS_NEVER_NOTIFY              = 0x20000000,
		DRSUAPI_DRS_SYNC_PAS                  = 0x40000000,

as you can see, 0x00200000 doesn't seem to exist. Can you please let
me know what this bit means? Can you also please check the other bits
to make sure they are right?

btw, I notice that MS-DRSR 5.37 got renumbered to 5.39 between the
August and September docs. Is this sort of renumbering going to be
frequent? We're putting comments in our code referring to section
numbers, and that is not much use if they change frequently. Perhaps
we should use section names?

Cheers, Tridge

PS: In case anyone is curious, the program I use to decode WSPP
bitfields is available here:


it is very rough, but it's somewhat better than being poked in the eye
by a horrendous bitmap every time you open a WSPP doc

More information about the cifs-protocol mailing list