Add Nicira vendor extensions

Add framework for Nicira vendor request messages.
This will be used to add support for NXT_SET_FLOW_FORMAT
and NXT_FLOW_MOD messages.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Add support for NXT_SET_FLOW_FORMAT

This message may be used to request that the NXM
flow format may be used. NXM is used as the match
in NX vendor extension messages such as NXT_FLOW_MOD.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Add base for serialising NXM matches

This will be used when sending NXT_FLOW_MOD messages.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
NXM: Add MFInPort class

This is to handle IN_PORT NXM fields.
This will be used when sending NXT_FLOW_MOD messages.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
NXM: Add MFTunId class

This is to handle TUN_ID and TUN_ID_W NXM fields.
This will be used when sending NXT_FLOW_MOD messages.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
NXM: Add MFEthDst class

This is to handle ETH_DST NXM fields.
This will used when sending NXT_FLOW_MOD messages.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
NXM: Add MFEthSrc class

This is to handle ETH_SRC NXM fields.
This will be used when sending NXM_FLOW_MOD messages.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
NXM: Add MFEthType class

This is to handle ETH_TYPE NXM fields.
This will used when sending NXM_FLOW_MOD messages.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
NXM: Add MFIPDSCP and MFIPECN classes

This is to handle IP_DSCP and IP_ECN NXM fields respectively.
This will be used when sending NXT_FLOW_MOD messages.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Add NXTFlowMod

Allow Nicira Extension NXT_FLOW_MOD vendor messages
to be serialised. This is to allow setting flows
which require the use of NXM matches, for example
matching on the tunnel id.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Add match_tuple() and flow_format() methods to ClsRule

This will be used to allow send_flow_mod() to
send either OFPFlowMod or NXTFlowMod messages.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Allow send_flow_mod() to send NXTFlowMod messages

Allow send_flow_mod() to send NXTFlowMod messages in place of OFPFlowMod
messages if the match includes fields chat can't be encoded by OFPMatch

The flow format will be upgraded as necessary

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Add NXActionSetTunnel and NXActionSetTunnel64

These actions allow setting of the tunnel id when a packet
is transmitted over a tunnel. For example, to set a tenant-specific
id when transmitting packets over a tunnel used by more than one tenant.

The NXActionSetTunnel64 was added to OpenvSwtich after NXActionSetTunnel.
NXActionSetTunnel64 seems to be the preferred action although GRE tunnels
only support 32bit keys.t

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
ignore GreenletExit exception

We get a pretty anonying message every time a datapath has gone since
we kill send_thr gleenlet in the normal termination. Let's ignore the
exception.

In the long term, we should improve error message delivering. Just
printing an error is pretty useless.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>