from subprocess import Popen
import re
import requests
+import os
from mininet.net import Containernet
from mininet.node import Controller, DefaultController, OVSSwitch, OVSKernelSwitch, Docker, RemoteController
"""
def __init__(self, controller=RemoteController, monitor=False,
- enable_learning = True, # in case of RemoteController (Ryu), learning switch behavior can be turned off/on
+ enable_learning=False, # learning switch behavior of the default ovs switches icw Ryu controller can be turned off/on, neede for E-LAN functionality
dc_emulation_max_cpu=1.0, # fraction of overall CPU time for emulation
dc_emulation_max_mem=512, # emulation max mem in MB
**kwargs):
Containernet.__init__(
self, switch=OVSKernelSwitch, controller=controller, **kwargs)
+ # default switch configuration
+ enable_ryu_learning = False
+ if enable_learning :
+ self.failMode = 'standalone'
+ enable_ryu_learning = True
+ else:
+ self.failMode = 'secure'
+
# Ryu management
if controller == RemoteController:
# start Ryu controller
- self.startRyu(learning_switch=enable_learning)
+ self.startRyu(learning_switch=enable_ryu_learning)
# add the specified controller
self.addController('c0', controller=controller)
"""
assert node1 is not None
assert node2 is not None
- LOG.debug("addLink: n1=%s n2=%s" % (str(node1), str(node2)))
+
# ensure type of node1
if isinstance( node1, basestring ):
if node1 in self.dcs:
attr_dict2.update(attr_dict)
self.DCNetwork_graph.add_edge(node2.name, node1.name, attr_dict=attr_dict2)
+ LOG.debug("addLink: n1={0} intf1={1} -- n2={2} intf2={3}".format(
+ str(node1),node1_port_name, str(node2), node2_port_name))
+
return link
def addDocker( self, label, **params ):
"""
Wrapper for addSwitch method to store switch also in graph.
"""
+
+ # add this switch to the global topology overview
if add_to_graph:
self.DCNetwork_graph.add_node(name)
- return Containernet.addSwitch(self, name, protocols='OpenFlow10,OpenFlow12,OpenFlow13', **params)
+
+ # set the learning switch behavior
+ if 'failMode' in params :
+ failMode = params['failMode']
+ else :
+ failMode = self.failMode
+
+ s = Containernet.addSwitch(self, name, protocols='OpenFlow10,OpenFlow12,OpenFlow13', failMode=failMode, **params)
+
+ # set flow entry that enables learning switch behavior (needed to enable E-LAN functionality)
+ #LOG.info('failmode {0}'.format(failMode))
+ #if failMode == 'standalone' :
+ # LOG.info('add NORMAL')
+ # s.dpctl('add-flow', 'actions=NORMAL')
+
+ return s
def getAllContainers(self):
"""
def CLI(self):
CLI(self)
+ def setLAN(self, vnf_list):
+ """
+ setup an E-LAN network by assigning the same VLAN tag to each DC interface of the VNFs in the E-LAN
+
+ :param vnf_list: names of the VNFs in this E-LAN [{name:,interface:},...]
+ :return:
+ """
+ src_sw = None
+ src_sw_inport_nr = 0
+ src_sw_inport_name = None
+
+ # get a vlan tag for this E-LAN
+ vlan = self.vlans.pop()
+
+ for vnf in vnf_list:
+ vnf_src_name = vnf['name']
+ vnf_src_interface = vnf['interface']
+
+ # check if port is specified (vnf:port)
+ if vnf_src_interface is None:
+ # take first interface by default
+ connected_sw = self.DCNetwork_graph.neighbors(vnf_src_name)[0]
+ link_dict = self.DCNetwork_graph[vnf_src_name][connected_sw]
+ vnf_src_interface = link_dict[0]['src_port_id']
+
+ for connected_sw in self.DCNetwork_graph.neighbors(vnf_src_name):
+ link_dict = self.DCNetwork_graph[vnf_src_name][connected_sw]
+ for link in link_dict:
+ if (link_dict[link]['src_port_id'] == vnf_src_interface or
+ link_dict[link]['src_port_name'] == vnf_src_interface): # Fix: we might also get interface names, e.g, from a son-emu-cli call
+ # found the right link and connected switch
+ src_sw = connected_sw
+ src_sw_inport_nr = link_dict[link]['dst_port_nr']
+ src_sw_inport_name = link_dict[link]['dst_port_name']
+ break
+
+ # set the tag on the dc switch interface
+ LOG.debug('set E-LAN: vnf name: {0} interface: {1} tag: {2}'.format(vnf_src_name, vnf_src_interface,vlan))
+ switch_node = self.getNodeByName(src_sw)
+ self._set_vlan_tag(switch_node, src_sw_inport_name, vlan)
+
+
+
+
+
def setChain(self, vnf_src_name, vnf_dst_name, vnf_src_interface=None, vnf_dst_interface=None, **kwargs):
"""
Chain 2 vnf interfaces together by installing the flowrules in the switches along their path.
:return: output log string
"""
cmd = kwargs.get('cmd')
- if cmd == 'add-flow':
+ if cmd == 'add-flow' or cmd == 'del-flows':
ret = self._chainAddFlow(vnf_src_name, vnf_dst_name, vnf_src_interface, vnf_dst_interface, **kwargs)
if kwargs.get('bidirectional'):
ret = ret +'\n' + self._chainAddFlow(vnf_dst_name, vnf_src_name, vnf_dst_interface, vnf_src_interface, **kwargs)
- elif cmd == 'del-flows':
- ret = self._chainAddFlow(vnf_src_name, vnf_dst_name, vnf_src_interface, vnf_dst_interface, **kwargs)
- if kwargs.get('bidirectional'):
- ret = ret + '\n' + self._chainAddFlow(vnf_dst_name, vnf_src_name, vnf_dst_interface, vnf_src_interface, **kwargs)
-
else:
ret = "Command unknown"
def _chainAddFlow(self, vnf_src_name, vnf_dst_name, vnf_src_interface=None, vnf_dst_interface=None, **kwargs):
src_sw = None
- dst_sw = None
src_sw_inport_nr = 0
+ src_sw_inport_name = None
+ dst_sw = None
dst_sw_outport_nr = 0
+ dst_sw_outport_name = None
LOG.debug("call chainAddFlow vnf_src_name=%r, vnf_src_interface=%r, vnf_dst_name=%r, vnf_dst_interface=%r",
vnf_src_name, vnf_src_interface, vnf_dst_name, vnf_dst_interface)
# found the right link and connected switch
src_sw = connected_sw
src_sw_inport_nr = link_dict[link]['dst_port_nr']
+ src_sw_inport_name = link_dict[link]['dst_port_name']
break
if vnf_dst_interface is None:
# found the right link and connected switch
dst_sw = connected_sw
dst_sw_outport_nr = link_dict[link]['src_port_nr']
+ dst_sw_outport_name = link_dict[link]['src_port_name']
break
current_hop = src_sw
switch_inport_nr = src_sw_inport_nr
- # choose free vlan if path contains more than 1 switch
+ # choose free vlan
+ ## if path contains more than 1 switch
cmd = kwargs.get('cmd')
vlan = None
if cmd == 'add-flow':
- if len(path) > 1:
- vlan = self.vlans.pop()
+ vlan = self.vlans.pop()
+ ##if len(path) > 1:
+ ## vlan = self.vlans.pop()
for i in range(0,len(path)):
current_node = self.getNodeByName(current_hop)
kwargs['vlan'] = vlan
kwargs['path'] = path
kwargs['current_hop'] = current_hop
+ kwargs['switch_inport_name'] = src_sw_inport_name
+ kwargs['switch_outport_name'] = dst_sw_outport_name
if self.controller == RemoteController:
## set flow entry via ryu rest api
prefix = 'stats/flowentry/add'
if vlan != None:
if path.index(current_hop) == 0: # first node
- action = {}
- action['type'] = 'PUSH_VLAN' # Push a new VLAN tag if a input frame is non-VLAN-tagged
- action['ethertype'] = 33024 # Ethertype 0x8100(=33024): IEEE 802.1Q VLAN-tagged frame
- flow['actions'].append(action)
- action = {}
- action['type'] = 'SET_FIELD'
- action['field'] = 'vlan_vid'
- action['value'] = vlan
- flow['actions'].append(action)
- elif path.index(current_hop) == len(path) - 1: # last node
- match += ',dl_vlan=%s' % vlan
- action = {}
- action['type'] = 'POP_VLAN'
- flow['actions'].append(action)
- else: # middle nodes
+ # set vlan tag in ovs instance (to isolate E-LANs)
+ in_port_name = kwargs.get('switch_inport_name')
+ self._set_vlan_tag(node, in_port_name, vlan)
+ # set vlan push action if more than 1 switch in the path
+ if len(path) > 1:
+ action = {}
+ action['type'] = 'PUSH_VLAN' # Push a new VLAN tag if a input frame is non-VLAN-tagged
+ action['ethertype'] = 33024 # Ethertype 0x8100(=33024): IEEE 802.1Q VLAN-tagged frame
+ flow['actions'].append(action)
+ action = {}
+ action['type'] = 'SET_FIELD'
+ action['field'] = 'vlan_vid'
+ action['value'] = vlan
+ flow['actions'].append(action)
+
+ if path.index(current_hop) == len(path) - 1: # last node
+ # set vlan tag in ovs instance (to isolate E-LANs)
+ out_port_name = kwargs.get('switch_outport_name')
+ self._set_vlan_tag(node, out_port_name, vlan)
+ # set vlan pop action if more than 1 switch in the path
+ if len(path) > 1:
+ match += ',dl_vlan=%s' % vlan
+ action = {}
+ action['type'] = 'POP_VLAN'
+ flow['actions'].append(action)
+
+ if 0 < path.index(current_hop) < (len(path) - 1): # middle nodes
match += ',dl_vlan=%s' % vlan
+
# output action must come last
action = {}
action['type'] = 'OUTPUT'
flow['match'] = self._parse_match(match)
self.ryu_REST(prefix, data=flow)
+ def _set_vlan_tag(self, node, switch_port, tag):
+ node.vsctl('set', 'port {0} tag={1}'.format(switch_port,tag))
+ LOG.debug("set vlan in switch: {0} in_port: {1} vlan tag: {2}".format(node.name, switch_port, tag))
+
def _set_flow_entry_dpctl(self, node, switch_inport_nr, switch_outport_nr, **kwargs):
+
match = 'in_port=%s' % switch_inport_nr
cookie = kwargs.get('cookie')
def startRyu(self, learning_switch=True):
# start Ryu controller with rest-API
python_install_path = site.getsitepackages()[0]
- ryu_path = python_install_path + '/ryu/app/simple_switch_13.py'
+ # ryu default learning switch
+ #ryu_path = python_install_path + '/ryu/app/simple_switch_13.py'
+ #custom learning switch that installs a default NORMAL action in the ovs switches
+ dir_path = os.path.dirname(os.path.realpath(__file__))
+ ryu_path = dir_path + '/son_emu_simple_switch_13.py'
ryu_path2 = python_install_path + '/ryu/app/ofctl_rest.py'
# change the default Openflow controller port to 6653 (official IANA-assigned port number), as used by Mininet
# Ryu still uses 6633 as default
FNULL = open("/tmp/ryu.log", 'w')
if learning_switch:
self.ryu_process = Popen([ryu_cmd, ryu_path, ryu_path2, ryu_option, ryu_of_port], stdout=FNULL, stderr=FNULL)
+ LOG.debug('starting ryu-controller with {0}'.format(ryu_path))
+ LOG.debug('starting ryu-controller with {0}'.format(ryu_path2))
else:
# no learning switch, but with rest api
self.ryu_process = Popen([ryu_cmd, ryu_path2, ryu_option, ryu_of_port], stdout=FNULL, stderr=FNULL)
+ LOG.debug('starting ryu-controller with {0}'.format(ryu_path2))
time.sleep(1)
def killRyu(self):
--- /dev/null
+# 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 CONFIG_DISPATCHER, MAIN_DISPATCHER
+from ryu.controller.handler import set_ev_cls
+from ryu.ofproto import ofproto_v1_3
+from ryu.lib.packet import packet
+from ryu.lib.packet import ethernet
+from ryu.lib.packet import ether_types
+from ryu.topology.event import EventSwitchEnter, EventSwitchLeave, EventSwitchReconnected
+
+class SimpleSwitch13(app_manager.RyuApp):
+ OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
+
+ def __init__(self, *args, **kwargs):
+ super(SimpleSwitch13, self).__init__(*args, **kwargs)
+ self.mac_to_port = {}
+
+ @set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
+ def switch_features_handler(self, ev):
+ datapath = ev.msg.datapath
+ ofproto = datapath.ofproto
+ parser = datapath.ofproto_parser
+
+ # install table-miss flow entry
+ #
+ # We specify NO BUFFER to max_len of the output action due to
+ # OVS bug. At this moment, if we specify a lesser number, e.g.,
+ # 128, OVS will send Packet-In with invalid buffer_id and
+ # truncated packet data. In that case, we cannot output packets
+ # correctly. The bug has been fixed in OVS v2.1.0.
+ match = parser.OFPMatch()
+ actions = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
+ ofproto.OFPCML_NO_BUFFER)]
+ self.add_flow(datapath, 0, match, actions)
+
+ def add_flow(self, datapath, priority, match, actions, buffer_id=None):
+ ofproto = datapath.ofproto
+ parser = datapath.ofproto_parser
+
+ inst = [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
+ actions)]
+ if buffer_id:
+ mod = parser.OFPFlowMod(datapath=datapath, buffer_id=buffer_id,
+ priority=priority, match=match,
+ instructions=inst)
+ else:
+ mod = parser.OFPFlowMod(datapath=datapath, priority=priority,
+ match=match, instructions=inst)
+ datapath.send_msg(mod)
+
+ # new switch detected
+
+ @set_ev_cls([EventSwitchEnter, EventSwitchReconnected])
+ def _ev_switch_enter_handler(self, ev):
+ datapath = ev.switch.dp
+ self.logger.info('registered OF switch id: %s' % datapath.id)
+ ofproto = datapath.ofproto
+ self.logger.info('OF version: {0}'.format(ofproto))
+ # send NORMAL action for all undefined flows
+ ofp_parser = datapath.ofproto_parser
+ actions = [ofp_parser.OFPActionOutput(ofproto_v1_3.OFPP_NORMAL)]
+ self.add_flow(datapath, 0, None, actions)
+
+
+ @set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
+ def _packet_in_handler(self, ev):
+ # If you hit this you might want to increase
+ # the "miss_send_length" of your switch
+ if ev.msg.msg_len < ev.msg.total_len:
+ self.logger.debug("packet truncated: only %s of %s bytes",
+ ev.msg.msg_len, ev.msg.total_len)
+ msg = ev.msg
+ datapath = msg.datapath
+ ofproto = datapath.ofproto
+ parser = datapath.ofproto_parser
+ 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 = [parser.OFPActionOutput(out_port)]
+
+ # install a flow to avoid packet_in next time
+ if out_port != ofproto.OFPP_FLOOD:
+ match = parser.OFPMatch(in_port=in_port, eth_dst=dst)
+ # verify if we have a valid buffer_id, if yes avoid to send both
+ # flow_mod & packet_out
+ if msg.buffer_id != ofproto.OFP_NO_BUFFER:
+ self.add_flow(datapath, 1, match, actions, msg.buffer_id)
+ return
+ else:
+ self.add_flow(datapath, 1, match, actions)
+ data = None
+ if msg.buffer_id == ofproto.OFP_NO_BUFFER:
+ data = msg.data
+
+ out = parser.OFPPacketOut(datapath=datapath, buffer_id=msg.buffer_id,
+ in_port=in_port, actions=actions, data=data)
+ datapath.send_msg(out)
projects / osm / vim-emu.git / commitdiff