Re: [ECOS] Sending network broadast packet.

[Gary Thomas <gthomas at redhat dot com>]

On Wed, 2001-09-26 at 08:28, Mervyn Wongso wrote:
> Thanks for you reply.
> 
> I've already looked at BOOTP and DHCP code. I can only send out
> 255.255.255.255 broadcast packet only if my IP address is 0.0.0.0 and
> subnetmask 0.0.0.0. Once the IP address and subnetmask are changed with the
> actual network IP address and subnetmask, I can't transmit 255.255.255.255
> broadcast packet anymore.
> 

Sorry, in that case I guess that you'll have to dig a little deeper.

This definitely should work.

Have you tried looking at BOOTP server code from other systems, 
especially FreeBSD?  There might be some trick in there to get the
stack to behave.  

> For your information, I'm trying to implement a BOOTP server.
> 
> Thanks.
> 
> 
> ----- Original Message -----
> From: "Gary Thomas" <gthomas@redhat.com>
> To: "Mervyn Wongso" <intertel_ecos@hotmail.com>
> Cc: "eCos Discussion" <ecos-discuss@sources.redhat.com>
> Sent: Tuesday, September 25, 2001 4:06 PM
> Subject: Re: [ECOS] Sending network broadast packet.
> 
> 
> > On Wed, 2001-09-26 at 07:45, Mervyn Wongso wrote:
> > > I'm trying to send a packet with the destination IP address
> 255.255.255.255
> > > but the IP stack keeps altering the destionation address to the subnet
> > > broadcast address. But, when I set the interface's broadcast address to
> > > 255.255.255.255, I get EHOSTUNREACH error when I call sendto().
> > >
> > > Any help will be appreciated.
> > >
> >
> > Look at the BOOTP or DHCP code - these routines use broadcast and work
> > fine.
> >
> >
> >