[Planetlab-users] Summary of virtual-network related issues

[Jawwad Shamsi]

Hi Sapan
These are just UDP probing packets. The packets are continoulsy sent few
seconds a part. The response of the probe is utilized to measure the round
trip and one way latency. The payload of UDP packet is 16 bytes.
The libpcap filter can capture the  outgoing packets being sent to a peer,
but the incoming packets received from the other peer remain unnoticed.
Although, I can verify that the packets are  being received at the socket
end of my application.


Jawwad

On Mon, Jul 14, 2008 at 12:22 AM, Sapan Bhatia <sapanb at cs.princeton.edu>
wrote:

> Hi Jawwad,
>
> Can you describe the kind of packets that your application is
> generating and that you're trying to capture?
>
> Sapan
>
> On Mon, Jul 14, 2008 at 12:17 AM, Jawwad Shamsi <jawwadshamsi at gmail.com>
> wrote:
> >
> > Hello,
> > I have a UDP based application which uses libpcap to capture packet
> > information. The application was working fine in the previous version of
> the
> > PlanetLab. However, in the newer version of PL, the libpcap application
> can
> > only capture the outgoing packets, while the incoming packets remain
> > unnoticed.
> >
> > Seems like it is related to the virtual network issue mentioned here.
> >
> > Jawwad
> >
> >
> >
> > On Fri, Jul 11, 2008 at 9:36 AM, Sapan Bhatia <> wrote:
> >>
> >> Hi,
> >>
> >> This is just to let everyone who's complained about tcpdump not
> >> working as expected know of the timeline for a solution to their
> >> problem. If there's a deadline coming up for which you'd like any of
> >> these accelerated, then please let me know. I'm hopeful that we'll be
> >> able to resolve this set of issues in the next couple of days.
> >>
> >> [TODO]
> >>
> >> * TCP payloads for accept()ed sockets don't show up in tcpdump, even
> >> though headers do
> >> * TCP-related ICMP-error messages don't show up on nodes
> >>
> >> [Already tagged the next RC]
> >>
> >> * TCP handshakes don't show up in tcpdump
> >>  [checked in a vsys module for slices that need this functionality]
> >> * TUN/TAP support
> >>
> >>
> >> Sapan
> >>
> >> _______________________________________________
> >> Users mailing list: Users at lists.planet-lab.org
> >> https://lists.planet-lab.org/mailman/listinfo/users
> >
> >
>
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