[ovs-git] Open vSwitch: ofproto: Support OF version-specific table-miss behaviours (master)

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commit 6b83a3c5c37a07118681a3738ec776a7d8485a3f
Diffs: http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=commitdiff;h=6b83a3c5c37a07118681a3738ec776a7d8485a3f
Author: Simon Horman <horms at verge.net.au>
		
ofproto: Support OF version-specific table-miss behaviours
		
OpenFlow 1.1 and 1.2 specify that if a table-miss occurs then the default
behaviour is to forward the packet the controller using a packet-in
message. And until this patch this is the default behaviour that Open
vSwitch uses for all OpenFlow versions.

OpenFlow1.3+ specifies that if a table-miss occurs then the default
behaviour is simply to drop the packet. This patch implements this
behaviour using the following logic:

If a table-miss occurs and the table-miss behaviour for the table
has not been set using a table_mod (in which case it is no longer
the default setting) then:

* Installing a facet in the datapath with a drop action in the
  if there are no pre-OF1.3 controllers connected which would receive
  an packet_in message.

  Note that this covers both the case where there are only OF1.3
  controllers and the case where there are no controllers at all.

* Otherwise sent a packet_in message to all pre-OF1.3 controllers.

  This covers both the case where there are only pre-OF1.3
  controllers and there are both pre-OF1.3 and OF1.3+ controllers.

Signed-off-by: Simon Horman <horms at verge.net.au>
Signed-off-by: Ben Pfaff <blp at nicira.com>


-----------------------------------------------------------------------

Summary of changes:
 OPENFLOW-1.1+                |    7 -----
 ofproto/connmgr.c            |   62 +++++++++++++++++++++++++++++++++++++++++-
 ofproto/connmgr.h            |    1 +
 ofproto/ofproto-dpif-xlate.c |    5 ++++
 ofproto/ofproto-dpif.c       |   44 +++++++++++++++++++++++-------
 ofproto/ofproto-dpif.h       |    8 ++++++
 ofproto/ofproto-provider.h   |    2 +-
 ofproto/ofproto.c            |    8 +++---
 ofproto/ofproto.h            |   20 ++++++++++++--
 tests/ofproto-dpif.at        |   42 +++++++++++++++++++++++-----
 tests/tunnel.at              |    2 +-
 11 files changed, 168 insertions(+), 33 deletions(-)


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