b5c4b9ae51
Signed-off-by: Takeshi <a86487817@gmail.com> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
93 lines
3.2 KiB
Python
93 lines
3.2 KiB
Python
# Copyright (C) 2011 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.
|
|
|
|
from ryu.base import app_manager
|
|
from ryu.controller import ofp_event
|
|
from ryu.controller.handler import MAIN_DISPATCHER
|
|
from ryu.controller.handler import set_ev_cls
|
|
from ryu.ofproto import ofproto_v1_2
|
|
from ryu.lib.packet import packet
|
|
from ryu.lib.packet import ethernet
|
|
from ryu.lib.packet import ether_types
|
|
|
|
|
|
class SimpleSwitch12(app_manager.RyuApp):
|
|
OFP_VERSIONS = [ofproto_v1_2.OFP_VERSION]
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super(SimpleSwitch12, self).__init__(*args, **kwargs)
|
|
self.mac_to_port = {}
|
|
|
|
def add_flow(self, datapath, port, dst, actions):
|
|
ofproto = datapath.ofproto
|
|
|
|
match = datapath.ofproto_parser.OFPMatch(in_port=port,
|
|
eth_dst=dst)
|
|
inst = [datapath.ofproto_parser.OFPInstructionActions(
|
|
ofproto.OFPIT_APPLY_ACTIONS, actions)]
|
|
|
|
mod = datapath.ofproto_parser.OFPFlowMod(
|
|
datapath=datapath, cookie=0, cookie_mask=0, table_id=0,
|
|
command=ofproto.OFPFC_ADD, idle_timeout=0, hard_timeout=0,
|
|
priority=0, buffer_id=ofproto.OFP_NO_BUFFER,
|
|
out_port=ofproto.OFPP_ANY,
|
|
out_group=ofproto.OFPG_ANY,
|
|
flags=0, match=match, instructions=inst)
|
|
datapath.send_msg(mod)
|
|
|
|
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
|
|
def _packet_in_handler(self, ev):
|
|
msg = ev.msg
|
|
datapath = msg.datapath
|
|
ofproto = datapath.ofproto
|
|
in_port = msg.match['in_port']
|
|
|
|
pkt = packet.Packet(msg.data)
|
|
eth = pkt.get_protocols(ethernet.ethernet)[0]
|
|
|
|
if eth.ethertype == ether_types.ETH_TYPE_LLDP:
|
|
# ignore lldp packet
|
|
return
|
|
dst = eth.dst
|
|
src = eth.src
|
|
|
|
dpid = datapath.id
|
|
self.mac_to_port.setdefault(dpid, {})
|
|
|
|
self.logger.info("packet in %s %s %s %s", dpid, src, dst, in_port)
|
|
|
|
# learn a mac address to avoid FLOOD next time.
|
|
self.mac_to_port[dpid][src] = 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, in_port, dst, actions)
|
|
|
|
data = None
|
|
if msg.buffer_id == ofproto.OFP_NO_BUFFER:
|
|
data = msg.data
|
|
|
|
out = datapath.ofproto_parser.OFPPacketOut(
|
|
datapath=datapath, buffer_id=msg.buffer_id, in_port=in_port,
|
|
actions=actions, data=data)
|
|
datapath.send_msg(out)
|