Add Nicira Extension NXT_SET_ASYNC_CONFIG support

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Isaku Yamahata <yamahata@valinux.co.jp>
Reviewed-by: Simon Horman <horms@verge.net.au>

ryu/ofproto/ofproto_v1_0.py

@@ -576,6 +576,7 @@
 NXT_SET_PACKET_IN_FORMAT = 16
 NXT_PACKET_IN = 17
 NXT_FLOW_AGE = 18
+NXT_SET_ASYNC_CONFIG = 19
 NXT_SET_CONTROLLER_ID = 20
 
 # enum nx_role
@@ -631,6 +632,11 @@
 assert (calcsize(NX_PACKET_IN_PACK_STR) +
         NICIRA_HEADER_SIZE == NX_PACKET_IN_SIZE)
 
+NX_ASYNC_CONFIG_PACK_STR = '!IIIIII'
+NX_ASYNC_CONFIG_SIZE = 40
+assert (calcsize(NX_ASYNC_CONFIG_PACK_STR) +
+        NICIRA_HEADER_SIZE == NX_ASYNC_CONFIG_SIZE)
+
 NX_CONTROLLER_ID_PACK_STR = '!6xH'
 NX_CONTROLLER_ID_SIZE = 24
 assert (calcsize(NX_CONTROLLER_ID_PACK_STR) +

ryu/ofproto/ofproto_v1_0_parser.py

@@ -1410,6 +1410,24 @@ def _serialize_body(self):
         self.serialize_header()
 
 
+class NXTSetAsyncConfig(NiciraHeader):
+    def __init__(self, datapath, packet_in_mask, port_status_mask,
+                 flow_removed_mask):
+        super(NXTSetAsyncConfig, self).__init__(
+            datapath, ofproto_v1_0.NXT_SET_ASYNC_CONFIG)
+        self.packet_in_mask = packet_in_mask
+        self.port_status_mask = port_status_mask
+        self.flow_removed_mask = flow_removed_mask
+
+    def _serialize_body(self):
+        self.serialize_header()
+        msg_pack_into(ofproto_v1_0.NX_ASYNC_CONFIG_PACK_STR,
+                      self.buf, ofproto_v1_0.NICIRA_HEADER_SIZE,
+                      self.packet_in_mask[0], self.packet_in_mask[1],
+                      self.port_status_mask[0], self.port_status_mask[1],
+                      self.flow_removed_mask[0], self.flow_removed_mask[1])
+
+
 class NXTSetControllerId(NiciraHeader):
     def __init__(self, datapath, controller_id):
         super(NXTSetControllerId, self).__init__(