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How can a Win95 VxD montior IFS calls to Novell's NetWare Client 32

wgray
wgray asked
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Last Modified: 2013-12-03
It seems that file I/O calls on drives mapped by a Novell's Netware 32-bit Client cannot be intercepted by a Win95 VxD via the IFS hook. The Microsoft NetWare Client redirector can be hooked in this way (as this is the intended architecture for IFS/FSD layering). Apparently, Novell did not follow the WOSA layered File System spec and somehow bypassed the normal IFS file system chain.  I took a quick look at the INT 21h protect mode calls that are the VWIN32 front end to the IFS manager and did not see any calls to the NetWare mapped drives going through that interface either.

Does anyone know how Novell implemented their NetWare Client and, more specifically, how to monitor file operations (Open, read, write, etc.) on remote NetWare drives?

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What kind of monitoring operation are you concerned with?  There may be a Netware API call that will do what you need.  Are you worried about server security or what?

It sounds like you want to intercept the command packets and interpret them.

You are right, a lot of the things that Netware did with their Client32 *really* screwed things up.  Are you forced with using the 32-bit client?  I wound up using the MS client and using OLE to thunk to the old API interfaces.

Just an idea:  if you can't find any other way, use VC++ and step through the assembler code of an open() operation.  It might take a day, but it would work.  Just keep an eye on the call stack to follow the .dll / .vxd usage.


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