[libvirt] [PATCH V14 4/5] nwfilter: Add multiple IP address support to DHCP snooping

[Eric Blake]

On 05/25/2012 05:56 AM, Stefan Berger wrote:
> With support for multiple IP addresses per interface in place, this patch
> now adds support for multiple IP addresses per interface for the DHCP
> snooping code.
> 
> 
> Testing:
> 
> Since the infrastructure I tested this with does not provide multiple IP
> addresses per MAC address (anymore), I either had to plug the VM's interface
> from the virtual bride connected directly to the infrastructure to virbr0
> to get a 2nd IP address from dnsmasq (kill and run dhclient inside the VM)
> or changed the lease file  (/var/run/libvirt/network/nwfilter.leases) and
> restart libvirtd to have a 2nd IP address on an existing interface.
> Note that dnsmasq can take a lease timeout parameter as part of the --dhcp-range
> command line parameter, so that timeouts can be tested that way
> (--dhcp-range 192.168.122.2,192.168.122.254,120). So, terminating and restarting
> dnsmasq with that parameter is another choice to watch an IP address disappear
> after 120 seconds.
> 
> Regards,
>    Stefan
> 
> ---
>  src/nwfilter/nwfilter_dhcpsnoop.c |  107 +++++++++++++++++++++++---------------
>  1 file changed, 67 insertions(+), 40 deletions(-)

I'm not in a position to runtime test this, but it did pass my compile
tests and looked clean from inspection.  ACK.

-- 
Eric Blake   eblake at redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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