Nmap Development: Re: nmap 3.3+V-2.99

[Fyodor <fyodor () insecure org>]

On Mon, Sep 01, 2003 at 12:54:23AM +0200, Gisle Vanem wrote:
> Here's some patches that works for me:
Thanks for the patch.  The utils.cc part applies to base Nmap as
opposed to just Saurik's Nmap+V.  I have applied most of it for the
next version.  The only chunk I didn't apply is:

> @@ -655,12 +678,13 @@
>     works if the file is the most recently mapped one */
>  int win32_munmap(char *filestr, int filelen)
>  {
> - if(gmap == 0)
> -  fatal("win32_munmap: no current mapping !\n");
> - FlushViewOfFile(filestr, filelen);
> - UnmapViewOfFile(filestr);
> - CloseHandle(gmap);
> - gmap = 0;
> + if(gmap)
> + {
> +  FlushViewOfFile(filestr, filelen);
> +  UnmapViewOfFile(filestr);
> +  CloseHandle(gmap);
> + }
> + gmap = NULL;
>   return 0;
>  }

Is there a good reason for not bailing if gmap is NULL?  The point is
to detect cases where the code munmap's a file that it hasn't even
mmap'd (or if it munmaps a file twice).  Other than these cases of API
misuse, does the (gmap == 0) check cause any problems?

Thanks,
Fyodor

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