os-ken/ryu/app/simple_switch_lacp.py
Yuichi Ito 085717b41f lacplib: reduce unnecessary constant
and correct the inaccurate dispatchers.

Signed-off-by: Yuichi Ito <ito.yuichi0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
2013-11-20 05:41:16 -08:00

117 lines
4.2 KiB
Python

# 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 addrconv
from ryu.lib import lacplib
from ryu.lib.dpid import str_to_dpid
class SimpleSwitchLacp(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_0.OFP_VERSION]
_CONTEXTS = {'lacplib': lacplib.LacpLib}
def __init__(self, *args, **kwargs):
super(SimpleSwitchLacp, self).__init__(*args, **kwargs)
self.mac_to_port = {}
self._lacp = kwargs['lacplib']
# in this sample application, bonding i/fs of the switchs
# shall be set up as follows:
# - the port 1 and 2 of the datapath 1 face the slave i/fs.
# - the port 3, 4 and 5 of the datapath 1 face the others.
# - the port 1 and 2 of the datapath 2 face the others.
self._lacp.add(
dpid=str_to_dpid('0000000000000001'), ports=[1, 2])
self._lacp.add(
dpid=str_to_dpid('0000000000000001'), ports=[3, 4, 5])
self._lacp.add(
dpid=str_to_dpid('0000000000000002'), ports=[1, 2])
def add_flow(self, datapath, in_port, dst, actions):
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
match = parser.OFPMatch(in_port=in_port,
dl_dst=addrconv.mac.text_to_bin(dst))
mod = parser.OFPFlowMod(
datapath=datapath, match=match, cookie=0,
command=ofproto.OFPFC_ADD, actions=actions)
datapath.send_msg(mod)
def del_flow(self, datapath, dst):
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
match = parser.OFPMatch(dl_dst=addrconv.mac.text_to_bin(dst))
mod = parser.OFPFlowMod(
datapath=datapath, match=match, cookie=0,
command=ofproto.OFPFC_DELETE)
datapath.send_msg(mod)
@set_ev_cls(lacplib.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)
src = addrconv.mac.bin_to_text(src_)
dst = addrconv.mac.bin_to_text(dst_)
dpid = datapath.id
self.mac_to_port.setdefault(dpid, {})
self.logger.info("packet in %s %s %s %s",
dpid, src, 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(lacplib.EventSlaveStateChanged, MAIN_DISPATCHER)
def _slave_state_changed_handler(self, ev):
datapath = ev.datapath
dpid = datapath.id
port_no = ev.port
enabled = ev.enabled
self.logger.info("slave state changed port: %d enabled: %s",
port_no, enabled)
if dpid in self.mac_to_port:
for mac in self.mac_to_port[dpid]:
self.del_flow(datapath, mac)
del self.mac_to_port[dpid]
self.mac_to_port.setdefault(dpid, {})