Re: Was change to ip_push_pending_frames intended to break udp (more specifically, WCCP?)

[Vlad Yasevich <vladislav.yasevich@hp.com>]

On Tue, 2006-05-23 at 00:21 +0400, Paul P Komkoff Jr wrote:
> Replying to Vlad Yasevich:
> >     /* This is only to work around buggy Windows95/2000
> >      * VJ compression implementations.  If the ID field
> >      * does not change, they drop every other packet in
> >      * a TCP stream using header compression.
> >      */
> 
> Unfortunately, cisco IOS also complains that packets are "duplicate".
> And, regarding to your previous message on how to fix this - IIRC, if
> I do connect() on this socket, it will refuse to receive datagrams
> from hosts other than specified in connect(), and I will be unable to
> bind another socket to the same port on my side.
> 
> That said, the only solution which is close to what been before, will
> be to keep one socket for receive, and create socket for each router I
> am communicating with, right?

Yewwww...  I see you problem.

To me this sounds like a bug in IOS.  I hope someone else would comment.

I did previously search a bunch of RFC and nowhere did a find a
requirement that IDs should be non-zero when DF bit is set.  The only
time IP IDs are mentioned is in the fragmentation and reassembly
description. 

-vlad