Re: Missing getaddrinfo on Windows 2000--almost solved

[David Fifield <david () bamsoftware com>]

On Thu, Aug 28, 2008 at 01:07:25AM +0530, Kris Katterjohn wrote:
> On Wed, Aug 27, 2008 at 10:32 PM, David Fifield <david () bamsoftware com> wrote:
> > > > So, does _WIN32_WINNT *have* to be set to _WIN32_WINNT_WIN2K, or can
> > > > it be something slightly newer, like maybe _WIN32_WINNT_WIN2KSP1?
> > > >
> > > > Of course I could hack a little in6addr_any for Ncat, but if Nmap or
> > > > anything else using Nbase wants any of these really common IPv6
> > > > definitions, this will be a problem.
> > >
> > > We compile Nmap using Visual C++ 2008, and the respective runtime components
> > > specify Windows 2000 SP4 as a minimum requirement*, so you can probably get
> > > away with WIN2KSP1 (although people may still be able to compile our source
> > > themselves using another compiler). I'd also be surprised if many people are
> > > still using WIN2K RTM anywhere, but I'm sure we'll manage to annoy someone
> > > somewhere if we leave them out ;)
> >
> > Setting it to SP4 sounds fine. The important thing is that it be set to
> > *something* otherwise it defaults to Vista or Longhorn.
>
> I was looking at the "Using the Windows Headers" MSDN page you posted
> which lists the NTDDI macros and values (including NTDDI_WIN2KSP*).
> The thing is I was in the mindset of _WIN32_WINNT so I must've just
> glazed over the NTDDI prefix when looking at this and thought I was
> looking at something different.  There are only 5 _WIN32_WINNT values,
> corresponding to major versions (2K, XP, Longhorn, etc) and without
> SPs.

Okay, I see.

I think you can set both. Set _WIN32_WINNT to _WIN32_WINNT_WIN2K and
then set NTDDI_VERSION to NTDDI_WIN2KSP4, both in nbase_winunix.h. If
you don't set NTDDI_VERSION it gets set based on the value of
_WIN32_WINNT in sdkddkver.h. Just look at sdkddkver.h, you'll see the
logic. I don't know where that file is kept but you can open it by
right-clicking on _WIN32_WINNT_WIN2K and selecting "Go to definition."

> Since I had already modified nbase_winunix.h on my box to use
> _WIN32_WINNT_WINXP so I could work on Ncat before looking around for
> any permanent solution to this, I just left it there and continued on
> thinking that it would work fine.
>
> So.. since it just has to be something before Vista, XP works fine for
> what I need and I guess will work for this other stuff too.  But I
> don't want to do anything without an OK on this.

We could use XP but I get the impression that we won't get any error if
we then use a function that's not available on Windows 2000. Just like
how if leave NTDDI_VERSION at its default of Vista, Visual Studio will
compile a program that uses Microsoft's inet_ntop, but it won't run on
XP. So try setting NTDDI_VERSION first, and if that doesn't work, then
bumping up to XP means we just have to be careful about what parts of
the API we use.

David

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