Re: Question for Corinna (was Re: Novice Question)

[Corinna Vinschen <corinna-cygwin at cygwin dot com>]

On Jun 29 10:50, Christopher Faylor wrote:
> On Mon, Jun 29, 2009 at 12:09:12PM +0100, Jon TURNEY wrote:
> >Andy wrote:
> >> /opt/wip/cygport-svn/xorg-server/xorg-server-1.6.0-10/src/xorg-server-1.6.0/
> >> os/access.c
> >> (gdb) p *ifr
> >> $1 = {ifa_next = 0x1447798, ifa_name = 0x14474c4
> >> "{B8B51884-C69A-4592-B65D-89ABB3DCF18D}", ifa_flags = 69635,
> >>   ifa_addr = 0x14474f0, ifa_netmask = 0x14475f0, ifa_dstaddr = 0x0, ifa_data
> >> = 0x0}
> >
> >:-)
> >
> >It seems that the (new for Cygwin 1.7) getifaddr() function can return 
> >interfaces with IFF_BROADCAST & IFF_UP set, but no broadcast address, which 
> >the X server assumes never happens
> 
> I was going to say that this sounds wrong but I see interfaces on my
> linux box which have no broadcast addresses but still have IFF_BROADCAST
> set.
> 
> Corinna, what do you think?

Thanks for nudging me by PM.  I didn't notice this question, sorry.

As for the broadcast address, you *have* to expect that an interface
is broadcast capable and the ifa_broadaddr pointer is NULL.  This
is at least true for all IPv6 entries.  For IPv4 that shouldn't occur
under Cygwin.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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