of14: Add table status support

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

2 files changed, 60 insertions, 1 deletions

diff --git a/ryu/ofproto/ofproto_v1_4.py b/ryu/ofproto/ofproto_v1_4.py
index 5f83e074..200e9b09 100644
--- a/ryu/ofproto/ofproto_v1_4.py
+++ b/ryu/ofproto/ofproto_v1_4.py
@@ -1414,7 +1414,11 @@ OFPTR_VACANCY_DOWN = 3  # Vacancy down threshold event.
 OFPTR_VACANCY_UP = 4  # Vacancy up threshold event.
 
 # struct ofp_table_status
-OFP_TABLE_STATUS_PACK_STR = '!B7x' + _OFP_TABLE_DESC_PACK_STR
+_OFP_TABLE_STATUS_0_PACK_STR = 'B7x'
+OFP_TABLE_STATUS_0_PACK_STR = '!' + _OFP_TABLE_STATUS_0_PACK_STR
+OFP_TABLE_STATUS_0_SIZE = 16
+OFP_TABLE_STATUS_PACK_STR = (OFP_TABLE_STATUS_0_PACK_STR +
+                             _OFP_TABLE_DESC_PACK_STR)
 OFP_TABLE_STATUS_SIZE = 24
 assert (calcsize(OFP_TABLE_STATUS_PACK_STR) + OFP_HEADER_SIZE ==
         OFP_TABLE_STATUS_SIZE)
diff --git a/ryu/ofproto/ofproto_v1_4_parser.py b/ryu/ofproto/ofproto_v1_4_parser.py
index f3b0aee8..74a6e33a 100644
--- a/ryu/ofproto/ofproto_v1_4_parser.py
+++ b/ryu/ofproto/ofproto_v1_4_parser.py
@@ -4416,6 +4416,61 @@ class OFPRoleStatus(MsgBase):
         return msg
 
 
+@_register_parser
+@_set_msg_type(ofproto.OFPT_TABLE_STATUS)
+class OFPTableStatus(MsgBase):
+    """
+    Table status message
+
+    The switch notifies controller of change of table status.
+
+    ================ ======================================================
+    Attribute        Description
+    ================ ======================================================
+    reason           One of the following values.
+                     OFPTR_VACANCY_DOWN
+                     OFPTR_VACANCY_UP
+    table            ``OFPTableDesc`` instance
+    ================ ======================================================
+
+    Example::
+
+        @set_ev_cls(ofp_event.EventOFPTableStatus, MAIN_DISPATCHER)
+        def table(self, ev):
+            msg = ev.msg
+            dp = msg.datapath
+            ofp = dp.ofproto
+
+            if msg.reason == ofp.OFPTR_VACANCY_DOWN:
+                reason = 'VACANCY_DOWN'
+            elif msg.reason == ofp.OFPTR_VACANCY_UP:
+                reason = 'VACANCY_UP'
+            else:
+                reason = 'unknown'
+
+            self.logger.debug('OFPTableStatus received: reason=%s '
+                              'table_id=%d config=0x%08x properties=%s',
+                              reason, msg.table.table_id, msg.table.config,
+                              repr(msg.table.properties))
+    """
+    def __init__(self, datapath, reason=None, table=None):
+        super(OFPTableStatus, self).__init__(datapath)
+        self.reason = reason
+        self.table = table
+
+    @classmethod
+    def parser(cls, datapath, version, msg_type, msg_len, xid, buf):
+        msg = super(OFPTableStatus, cls).parser(datapath, version, msg_type,
+                                                msg_len, xid, buf)
+        (msg.reason,) = struct.unpack_from(ofproto.OFP_TABLE_STATUS_0_PACK_STR,
+                                           msg.buf, ofproto.OFP_HEADER_SIZE)
+
+        msg.table = OFPTableDesc.parser(msg.buf,
+                                        ofproto.OFP_TABLE_STATUS_0_SIZE)
+
+        return msg
+
+
 @_set_msg_type(ofproto.OFPT_PACKET_OUT)
 class OFPPacketOut(MsgBase):
     """