[cifs-protocol] Level 257 FindFirst rejected by some Windows servers even though NTLM

Steve French smfrench at gmail.com
Tue Aug 16 11:35:15 MDT 2011

A user sent me a trace of FindFirst level 257 (0x101 ) failing to
Windows CE with NT Status: STATUS_INVALID_LEVEL (0xc0000148)

even though dialect negotiated was NT LM 012 and that dialect is the
only prereq listed in MS-SMB for the level (see page 64).

How can the client determine under what condition that the server does
not support that level - -  and what level to fall back (or move up to
higher level)?   Level 257 is pretty basic.



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