Re: [Autotest] [PATCH] KVM test: Add support for ipv6 addresses

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On Wed, 2010-02-24 at 01:16 -0300, Lucas Meneghel Rodrigues wrote:
> H i Yogi, I have read and rebased your patch against current trunk. I
> have one doubt: I noticed that the tcpdump command you use to monitor
> traffic is basically all traffic that goes to network routers
> 
> /usr/sbin/tcpdump -npv ip6 -i any 'dst net ff02::2'
> 
> However, the IPv4 implementation filters the traffic to the dhcp/bootp
> port, 68. Therefore the ipv6 mapper captures more (non necessarily
> useful) mappings than the ipv4 version. I made some brief research and
> couldn't figure out how to do it. Do you think it's possible to refine
> the tcpdump command to make it look only on the dhp request port (68)?
> 

Hello Lucas, thanks for reviewing my patches for ipv6.
Following tcpdump command will capture only the icmp6 packets and not
all the ipv6 packets
tcpdump -npv -i any icmp6 and 'dst net ff02::2'

Since the patch uses ip6 link local address, we are looking for router
solicitation messages.
Thanks
Yogi
> On Wed, Feb 24, 2010 at 1:10 AM, Lucas Meneghel Rodrigues
> <lmr@xxxxxxxxxx> wrote:
> >
> > This patch enables ipv6 address support in kvm-autotest.
> > The patch adds a new dictionary called "address6_cache" for ip6 address.
> > Tcpdump is used to create this cache of link-local ipv6 address.
> >
> > Link-local ipv6 address is used because it eliminates to need to create
> > complex configuration on both the host and the guest.
> >
> > The ipv6 address for a guest can be obtained by using the new function
> > get_address6 in kvm_vm.py
> >
> > Signed-off-by: Yogananth Subramanian <anantyog@xxxxxxxxxx>
> > ---
> >  client/tests/kvm/kvm_preprocessing.py |   29 ++++++++++++++++++-
> >  client/tests/kvm/kvm_utils.py         |   28 +++++++++++++++++++
> >  client/tests/kvm/kvm_vm.py            |   49 +++++++++++++++++++++++++++++++--
> >  3 files changed, 101 insertions(+), 5 deletions(-)
> >
> >
> > _______________________________________________
> > Autotest mailing list
> > Autotest@xxxxxxxxxxxxxxx
> > http://test.kernel.org/cgi-bin/mailman/listinfo/autotest
> >
> >
> 
> 
> 

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