[ovs-git] [openvswitch/ovs] d6b7cf: datapath-windows: Support for hybrid forwarding

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/openvswitch/ovs
  Commit: d6b7cf62b0cdcb5853cf2385205ddfe4624b88d3
      https://github.com/openvswitch/ovs/commit/d6b7cf62b0cdcb5853cf2385205ddfe4624b88d3
  Author: Sorin Vinturis <svinturis at cloudbasesolutions.com>
  Date:   2014-11-24 (Mon, 24 Nov 2014)

  Changed paths:
    M datapath-windows/ovsext/PacketIO.c

  Log Message:
  -----------
  datapath-windows: Support for hybrid forwarding

In a hybrid forwarding environment, there are two types of packets that
enter and leave the Hyper-V extensible switch: NVGRE packets and non-NVGRE
packets. Hybrid forwarding involves filtering the incoming traffic based
on packet type.

Thus, we must split the incoming traffic into NVGRE and non-NVGRE packets.
All non-NVGRE traffic is forwarded by the OVS extension and processed as
usual, and the NVGRE traffic is passed to NDIS to be handled by the HNV
module.

Necessary VS project changes regarding the compiler settings will be made
in a different patch.

More details about hybrid forwarding and the necessary NDIS 6.40 support
is provided in issue #52.

Signed-off-by: Sorin Vinturis <svinturis at cloudbasesolutions.com>
Reported-by: Nithin Raju <nithin at vmware.com>
Reported-at: https://github.com/openvswitch/ovs-issues/issues/52
Acked-by: Nithin Raju <nithin at vmware.com>
Signed-off-by: Ben Pfaff <blp at nicira.com>