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[vsorcdistro/.git] / ryu / build / lib.linux-armv7l-2.7 / ryu / app / simple_switch_stp.py

diff --git a/ryu/build/lib.linux-armv7l-2.7/ryu/app/simple_switch_stp.py b/ryu/build/lib.linux-armv7l-2.7/ryu/app/simple_switch_stp.py
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+# Copyright (C) 2013 Nippon Telegraph and Telephone Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import struct
+
+from ryu.base import app_manager
+from ryu.controller.handler import MAIN_DISPATCHER
+from ryu.controller.handler import set_ev_cls
+from ryu.ofproto import ofproto_v1_0
+from ryu.lib import dpid as dpid_lib
+from ryu.lib import stplib
+from ryu.lib.mac import haddr_to_str
+
+
+class SimpleSwitchStp(app_manager.RyuApp):
+    OFP_VERSIONS = [ofproto_v1_0.OFP_VERSION]
+    _CONTEXTS = {'stplib': stplib.Stp}
+
+    def __init__(self, *args, **kwargs):
+        super(SimpleSwitchStp, self).__init__(*args, **kwargs)
+        self.mac_to_port = {}
+        self.stp = kwargs['stplib']
+
+        # Sample of stplib config.
+        #  please refer to stplib.Stp.set_config() for details.
+        """
+        config = {dpid_lib.str_to_dpid('0000000000000001'):
+                     {'bridge': {'priority': 0x8000,
+                                 'max_age': 10},
+                      'ports': {1: {'priority': 0x80},
+                                2: {'priority': 0x90}}},
+                  dpid_lib.str_to_dpid('0000000000000002'):
+                     {'bridge': {'priority': 0x9000}}}
+        self.stp.set_config(config)
+        """
+
+    def add_flow(self, datapath, in_port, dst, actions):
+        ofproto = datapath.ofproto
+
+        wildcards = ofproto_v1_0.OFPFW_ALL
+        wildcards &= ~ofproto_v1_0.OFPFW_IN_PORT
+        wildcards &= ~ofproto_v1_0.OFPFW_DL_DST
+
+        match = datapath.ofproto_parser.OFPMatch(
+            wildcards, in_port, 0, dst,
+            0, 0, 0, 0, 0, 0, 0, 0, 0)
+
+        mod = datapath.ofproto_parser.OFPFlowMod(
+            datapath=datapath, match=match, cookie=0,
+            command=ofproto.OFPFC_ADD, idle_timeout=0, hard_timeout=0,
+            priority=ofproto.OFP_DEFAULT_PRIORITY,
+            flags=ofproto.OFPFF_SEND_FLOW_REM, actions=actions)
+        datapath.send_msg(mod)
+
+    def delete_flow(self, datapath):
+        ofproto = datapath.ofproto
+
+        wildcards = ofproto_v1_0.OFPFW_ALL
+        match = datapath.ofproto_parser.OFPMatch(
+            wildcards, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
+
+        mod = datapath.ofproto_parser.OFPFlowMod(
+            datapath=datapath, match=match, cookie=0,
+            command=ofproto.OFPFC_DELETE)
+        datapath.send_msg(mod)
+
+    @set_ev_cls(stplib.EventPacketIn, MAIN_DISPATCHER)
+    def packet_in_handler(self, ev):
+        msg = ev.msg
+        datapath = msg.datapath
+        ofproto = datapath.ofproto
+
+        dst, src, _eth_type = struct.unpack_from('!6s6sH', buffer(msg.data), 0)
+
+        dpid = datapath.id
+        self.mac_to_port.setdefault(dpid, {})
+
+        self.logger.debug("packet in %s %s %s %s",
+                          dpid, haddr_to_str(src), haddr_to_str(dst),
+                          msg.in_port)
+
+        # learn a mac address to avoid FLOOD next time.
+        self.mac_to_port[dpid][src] = msg.in_port
+
+        if dst in self.mac_to_port[dpid]:
+            out_port = self.mac_to_port[dpid][dst]
+        else:
+            out_port = ofproto.OFPP_FLOOD
+
+        actions = [datapath.ofproto_parser.OFPActionOutput(out_port)]
+
+        # install a flow to avoid packet_in next time
+        if out_port != ofproto.OFPP_FLOOD:
+            self.add_flow(datapath, msg.in_port, dst, actions)
+
+        out = datapath.ofproto_parser.OFPPacketOut(
+            datapath=datapath, buffer_id=msg.buffer_id, in_port=msg.in_port,
+            actions=actions)
+        datapath.send_msg(out)
+
+    @set_ev_cls(stplib.EventTopologyChange, MAIN_DISPATCHER)
+    def _topology_change_handler(self, ev):
+        dp = ev.dp
+        dpid_str = dpid_lib.dpid_to_str(dp.id)
+        msg = 'Receive topology change event. Flush MAC table.'
+        self.logger.debug("[dpid=%s] %s", dpid_str, msg)
+
+        if dp.id in self.mac_to_port:
+            del self.mac_to_port[dp.id]
+        self.delete_flow(dp)
+
+    @set_ev_cls(stplib.EventPortStateChange, MAIN_DISPATCHER)
+    def _port_state_change_handler(self, ev):
+        dpid_str = dpid_lib.dpid_to_str(ev.dp.id)
+        of_state = {stplib.PORT_STATE_DISABLE: 'DISABLE',
+                    stplib.PORT_STATE_BLOCK: 'BLOCK',
+                    stplib.PORT_STATE_LISTEN: 'LISTEN',
+                    stplib.PORT_STATE_LEARN: 'LEARN',
+                    stplib.PORT_STATE_FORWARD: 'FORWARD'}
+        self.logger.debug("[dpid=%s][port=%d] state=%s",
+                          dpid_str, ev.port_no, of_state[ev.port_state])