Re: ncat broadcast support?

[Daniel Miller <bonsaiviking () gmail com>]

Compiled this on Win32 (Microsoft Visual C++ 2010 Express). It wouldn't 
build at first, due to some linker errors and a whole slew of error 
constants referenced in a system include file not being defined (I ended 
up copy-and-pasting the definitions from elsewhere. Not pretty, and not 
correct, but it shouldn't have affected this, since the constants 
weren't referenced anywhere else).

Oddly, though, I had success sending broadcast messages both with and 
without the new --broadcast flag on Windows! Can anyone confirm with an 
unpatched build that this works? Maybe Windows sockets don't need 
SO_BROADCAST set? I just don't know enough about it.

Dan

On 05/13/2010 05:19 PM, Daniel Miller wrote:
> On 05/13/2010 03:32 PM, Daniel Miller wrote:
> > On 05/12/2010 05:53 PM, Fyodor wrote:
> > > My initial thought is that maybe we should have a function like
> > > nsp_setbroadcast() which specifies whether, from that point on, all
> > > newly created sockets should have SO_BROADCAST set.  I suppose it
> > > should probably default to false, just like in the socket API.  But I
> > > imagine that Ncat, Nping, and Nmap may want to enable this.  Ncrack,
> > > on the other hand, may not.
> > >
> > > The change would have to tested on Windows and UNIX.  If you really
> > > can't get access to a Windows system, you may be able to recruit
> > > testers on this list.
> > >
> > > So I'd encourage you to write a patch, and I definitely encourage
> > > other folks to chime in if they know stuff about SO_BROADCAST that we
> > > don't, or if they have any other implementation ideas or concerns.
> > >
> > > Cheers,
> > > -F
> > This is the suggestion that I took. I have attached the patch, which 
> > appears to work well. I'll continue to test, and I'll see if I can 
> > try it on Windows, though I haven't compiled Nmap on Windows before. 
> > Anyone who would like to test this out would be more than welcome.
> >
> > Dan
> Found a couple errors while trying to compile on Windows (no prototype 
> for nsp_setbroadcast, cast to void * instead of const char * in 
> setsockopt call). Fixed patch attached.

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