netfilter buglog - Aug 2017 - [Bug 1177] New: Export 'ct_zone' field.

https://bugzilla.netfilter.org/show_bug.cgi?id=1177

            Bug ID: 1177
           Summary: Export 'ct_zone' field.
           Product: ulogd
           Version: SVN (please provide timestamp)
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: ulogd
          Assignee: netfilter-buglog at lists.netfilter.org
          Reporter: chessnut at outlook.com

Hi there, how are you guys doing.

Not sure if I missed it in the codebase, but it appears that zone field is not
exported from ulogd right now. A git grep for 'zone' only turns up
timezone.

According to the ovs ofctl, there is 'zone' information exported:
http://openvswitch.org/support/dist-docs/ovs-ofctl.8.txt

My employer, Nutanix, would really like to use this so that we can distinguish
between vlans for the same 5-tuple (src IP, src port, dest IP, dest port,
protocol).

History of the zone concept:
  - some discussion about using namespaces to solve 5-tuple collisions:
http://netdev.vger.kernel.narkive.com/tg0lEdAG/connection-tracking-and-vlan
  - somewhere along the way, Patrick McHardy mentions the idea of
"conntrack
zones"
  - This the RFC (2010): https://lwn.net/Articles/370152/

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