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L2_switch10 - V01.py
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L2_switch10 - V01.py
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#https://github.com/rafaelsilvag/Rypace/blob/master/app/rypace_switch_v01.py
# 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.
#sudo ovs-ofctl -O openflow10 dump-flows s1
#sudo mn -c && sudo mn --controller=remote,ip=192.168.1.11 --switch=ovsk,protocols=OpenFlow10 --topo=linear,3 --mac
#sudo mn -c && sudo mn --controller=remote,ip=192.168.1.11 --switch=ovsk,protocols=OpenFlow10 --topo=linear,3,2 --mac
# clear && sudo ryu-manager --observe-links --verbose flowmanager_1.0/AH_SDN_WORK_RYU/flowmanager_1.0/flowmanager.py
import logging
import struct
from ryu.base import app_manager
from ryu.controller import mac_to_port
from ryu.controller import ofp_event
from ryu.controller.handler import MAIN_DISPATCHER
from ryu.controller.handler import set_ev_cls
from ryu.lib.ip import ipv4_to_bin, ipv4_to_str
from ryu.lib.packet.icmp import icmp
from ryu.ofproto import ofproto_v1_0
from ryu.lib.mac import haddr_to_bin
from ryu.lib.packet import packet
from ryu.lib.packet import ethernet
from ryu.lib.packet import ipv4
from ryu.lib.packet import ipv6
from ryu.lib.packet import tcp
from ryu.lib.packet import udp
from ryu.lib.packet import icmp
from ryu.lib import addrconv
class RypaceSwitch(app_manager.RyuApp):
# Definicao da versao do OpenFlow - MK apenas suporta versao 1.0
OFP_VERSIONS = [ofproto_v1_0.OFP_VERSION]
#Metodo construtor
def __init__(self, *args, **kwargs):
super(RypaceSwitch, self).__init__(*args, **kwargs)
self.mac_to_port = {}
def ipv4_text_to_int(self, ip_text):
if ip_text == 0:
return ip_text
assert isinstance(ip_text, str)
return struct.unpack('!I', addrconv.ipv4.text_to_bin(ip_text))[0]
def ipv4_int_to_text(ip_int):
assert isinstance(ip_int, (int, long))
return addrconv.ipv4.bin_to_text(struct.pack('!I', ip_int))
# Adicionar regra na tabela Fluxo.
def add_flow(self, datapath, in_port, eth, actions):
ofproto = datapath.ofproto
"""
================ ==================================================
Attribute Description
================ ==================================================
wildcards Wildcard fields.
(match fields) For the available match fields,
please refer to the following.
================ ==================================================
================ =============== ==================================
Argument Value Description
================ =============== ==================================
in_port Integer 16bit Switch input port.
dl_src MAC address Ethernet source address.
dl_dst MAC address Ethernet destination address.
dl_vlan Integer 16bit Input VLAN id.
dl_vlan_pcp Integer 8bit Input VLAN priority.
dl_type Integer 16bit Ethernet frame type.
nw_tos Integer 8bit IP ToS (actually DSCP field, 6 bits).
nw_proto Integer 8bit IP protocol or lower 8 bits of
ARP opcode.
nw_src IPv4 address IP source address.
nw_dst IPv4 address IP destination address.
tp_src Integer 16bit TCP/UDP source port.
tp_dst Integer 16bit TCP/UDP destination port.
nw_src_mask Integer 8bit IP source address mask
specified as IPv4 address prefix.
nw_dst_mask Integer 8bit IP destination address mask
specified as IPv4 address prefix.
================ =============== ==================================
"""
match = datapath.ofproto_parser.OFPMatch(
in_port=in_port,
dl_type=eth.ethertype,
dl_src=haddr_to_bin(eth.src),
dl_dst=haddr_to_bin(eth.dst),)
idleTimeout = 20
hardTimeout = 20
mod = datapath.ofproto_parser.OFPFlowMod(
datapath=datapath, match=match, cookie=0,
command=ofproto.OFPFC_ADD, idle_timeout=idleTimeout, hard_timeout=hardTimeout,
priority=ofproto.OFP_DEFAULT_PRIORITY,
flags=ofproto.OFPFF_SEND_FLOW_REM, actions=actions)
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
# Captura o pacote recebido pelo Controlador.
pkt = packet.Packet(msg.data)
eth = pkt.get_protocol(ethernet.ethernet)
# Captura informacoes de IPv4 ou IPv6, TCP, UDP e ICMP, caso existam. Se o pacote
# nao ter, a variavel recebera None
ip_v4 = pkt.get_protocol(ipv4.ipv4)
ip_v6 = pkt.get_protocol(ipv6.ipv6)
tcp_port = pkt.get_protocol(tcp.tcp)
udp_port = pkt.get_protocol(udp.udp)
icmp_protocol = pkt.get_protocol(icmp.icmp)
dst = eth.dst
src = eth.src
dpid = datapath.id
self.mac_to_port.setdefault(dpid, {})
# Log Packet-In
self.logger.info("Packet(%s) in %s %s %s", dpid, src, dst, msg.in_port)
#self.logger.info(self.mac_to_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, eth, 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=msg.in_port,
actions=actions, data=data)
datapath.send_msg(out)
#######################################################################