117 lines
4.2 KiB
Python
117 lines
4.2 KiB
Python
# Copyright (C) 2013 Nippon Telegraph and Telephone Corporation.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import struct
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from os_ken.base import app_manager
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from os_ken.controller.handler import MAIN_DISPATCHER
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from os_ken.controller.handler import set_ev_cls
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from os_ken.ofproto import ofproto_v1_0
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from os_ken.lib import addrconv
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from os_ken.lib import lacplib
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from os_ken.lib.dpid import str_to_dpid
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class SimpleSwitchLacp(app_manager.RyuApp):
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OFP_VERSIONS = [ofproto_v1_0.OFP_VERSION]
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_CONTEXTS = {'lacplib': lacplib.LacpLib}
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def __init__(self, *args, **kwargs):
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super(SimpleSwitchLacp, self).__init__(*args, **kwargs)
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self.mac_to_port = {}
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self._lacp = kwargs['lacplib']
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# in this sample application, bonding i/fs of the switchs
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# shall be set up as follows:
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# - the port 1 and 2 of the datapath 1 face the slave i/fs.
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# - the port 3, 4 and 5 of the datapath 1 face the others.
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# - the port 1 and 2 of the datapath 2 face the others.
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self._lacp.add(
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dpid=str_to_dpid('0000000000000001'), ports=[1, 2])
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self._lacp.add(
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dpid=str_to_dpid('0000000000000001'), ports=[3, 4, 5])
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self._lacp.add(
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dpid=str_to_dpid('0000000000000002'), ports=[1, 2])
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def add_flow(self, datapath, in_port, dst, actions):
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ofproto = datapath.ofproto
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parser = datapath.ofproto_parser
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match = parser.OFPMatch(in_port=in_port,
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dl_dst=addrconv.mac.text_to_bin(dst))
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mod = parser.OFPFlowMod(
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datapath=datapath, match=match, cookie=0,
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command=ofproto.OFPFC_ADD, actions=actions)
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datapath.send_msg(mod)
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def del_flow(self, datapath, dst):
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ofproto = datapath.ofproto
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parser = datapath.ofproto_parser
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match = parser.OFPMatch(dl_dst=addrconv.mac.text_to_bin(dst))
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mod = parser.OFPFlowMod(
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datapath=datapath, match=match, cookie=0,
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command=ofproto.OFPFC_DELETE)
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datapath.send_msg(mod)
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@set_ev_cls(lacplib.EventPacketIn, MAIN_DISPATCHER)
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def _packet_in_handler(self, ev):
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msg = ev.msg
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datapath = msg.datapath
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ofproto = datapath.ofproto
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(dst_, src_, _eth_type) = struct.unpack_from(
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'!6s6sH', buffer(msg.data), 0)
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src = addrconv.mac.bin_to_text(src_)
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dst = addrconv.mac.bin_to_text(dst_)
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dpid = datapath.id
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self.mac_to_port.setdefault(dpid, {})
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self.logger.info("packet in %s %s %s %s",
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dpid, src, dst, msg.in_port)
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# learn a mac address to avoid FLOOD next time.
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self.mac_to_port[dpid][src] = msg.in_port
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if dst in self.mac_to_port[dpid]:
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out_port = self.mac_to_port[dpid][dst]
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else:
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out_port = ofproto.OFPP_FLOOD
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actions = [datapath.ofproto_parser.OFPActionOutput(out_port)]
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# install a flow to avoid packet_in next time
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if out_port != ofproto.OFPP_FLOOD:
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self.add_flow(datapath, msg.in_port, dst, actions)
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out = datapath.ofproto_parser.OFPPacketOut(
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datapath=datapath, buffer_id=msg.buffer_id, in_port=msg.in_port,
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actions=actions)
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datapath.send_msg(out)
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@set_ev_cls(lacplib.EventSlaveStateChanged, MAIN_DISPATCHER)
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def _slave_state_changed_handler(self, ev):
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datapath = ev.datapath
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dpid = datapath.id
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port_no = ev.port
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enabled = ev.enabled
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self.logger.info("slave state changed port: %d enabled: %s",
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port_no, enabled)
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if dpid in self.mac_to_port:
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for mac in self.mac_to_port[dpid]:
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self.del_flow(datapath, mac)
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del self.mac_to_port[dpid]
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self.mac_to_port.setdefault(dpid, {})
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