Re: raw sockets, IP_HDRINCL, and fragmentation

[Andi Kleen <ak@xxxxxxx>]

On Thu, Mar 07, 2002 at 01:59:19PM -0500, Chris Friesen wrote:
> Andi Kleen wrote:
> > 
> > On Thu, Mar 07, 2002 at 01:10:13PM -0500, Chris Friesen wrote:
> > >
> > > Just a quick question before I try some prototyping.  If I have a raw 
> > > socket and
> > > set IP_HDRINCL, then send out an IP packet larger than the underlying 
> > > physical
> > > layer can handle (say 2KB packets over ethernet) will the ip stack 
> > > fragment the
> > > packet for me?
> > 
> > They are not, as documented in raw(7)
> 
> 
> My man raw(7) says:
> 
> "When  the IP_HDRINCL option is set datagrams will not be fragmented and are
> limited to the interface MTU.  This is a limitation in Linux 2.2."
> 
> Does 2.4 have this same limitation?

It has.

-Andi