Tests in Mininet Env
edoardocoli
1 year ago
parent
0109446686
commit
7d24a53db9
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from mininet.net import Mininet
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from mininet.node import Controller, OVSSwitch
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from mininet.cli import CLI
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from mininet.log import setLogLevel
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class CustomController( Controller ):
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"Open vSwitch controller"
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def __init__( self, name, **kwargs ):
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kwargs.setdefault( 'command', self.isAvailable() or
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'ovs-controller' )
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Controller.__init__( self, name, **kwargs )
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# class CustomController(Controller):
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# def _handle_ConnectionUp(self, event):
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# # Handle new connection
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# dpid_str = dpid_to_str(event.dpid)
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# log.info("Switch %s connected", dpid_str)
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# self.connection = event.connection
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# event.connection.addListeners(self)
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# def _handle_PacketIn(self, event):
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# # Handle incoming packet
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# packet = event.parsed
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# if packet.type == ethernet.IP_TYPE:
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# ip_packet = packet.payload
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# src_ip = ip_packet.srcip
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# dst_ip = ip_packet.dstip
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# log.info("Source IP: %s, Destination IP: %s", src_ip, dst_ip)
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# # Call the parent handler to continue processing other events
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# super(CustomController, self)._handle_PacketIn(event)
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def create_topology():
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net = Mininet(controller=Controller, switch=OVSSwitch)
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# Create network nodes
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h1 = net.addHost('h1')
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h2 = net.addHost('h2')
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s1 = net.addSwitch('s1', cls=OVSSwitch)
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# Create links
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net.addLink(h1, s1)
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net.addLink(h2, s1)
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# Start the network
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net.start()
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# Create a custom controller instance
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controller = net.addController('c1', controller=CustomController)
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# Connect the switch to the controller
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s1.start([controller])
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# Enter command line mode
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CLI(net)
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# Stop the network
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net.stop()
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if __name__ == '__main__':
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setLogLevel('info')
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create_topology()
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@ -1,109 +1,84 @@
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import heapq
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import random
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from mininet.net import Mininet
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from mininet.node import OVSSwitch, Controller
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from mininet.link import TCLink
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from mininet.net import Mininet
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from mininet.topo import Topo
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from mininet.node import Node
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from mininet.cli import CLI
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from mininet.link import TCLink
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from mininet.node import Controller
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from mininet.log import setLogLevel
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from mininet.cli import CLI
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from pox.lib import of
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import time
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import matplotlib.pyplot as plt
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# Create empty lists to store the timestamp and latency values
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timestamps = []
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latencies = []
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class PacketCopyController(Controller):
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def __init__(self, name, target_host, **kwargs):
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Controller.__init__(self, name, **kwargs)
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self.target_host = target_host
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def _handle_PacketIn(self, event):
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packet = event.parsed
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self.packet_out(event.port, packet)
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self.packet_out_to_host(packet)
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# Measure latency and store timestamp and latency values
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latency = time.time() - event.created
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timestamps.append(time.time())
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latencies.append(latency)
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def packet_out(self, out_port, packet):
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msg = of.ofp_packet_out()
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msg.data = packet.pack()
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action = of.ofp_action_output(port=out_port)
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msg.actions.append(action)
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self.connection.send(msg)
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def packet_out_to_host(self, packet):
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host = self.net.get(self.target_host)
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if host:
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host.sendMsg(packet)
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class MyRouter (Node):
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def config(self, **params):
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super(MyRouter, self).config(**params)
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self.cmd('sysctl net.ipv4.ip_forward=1') #Enable forwarding on the router
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def terminate(self):
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self.cmd('sysctl net.ipv4.ip_forward=0') #Disable forwarding on the router
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super(MyRouter, self).terminate
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def create_topology():
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net = Topo()
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# Create the SD-WAN sites
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site1 = net.addHost('site1')
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site2 = net.addHost('site2')
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site3 = net.addHost('site3')
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# Create the virtual SD-WAN devices
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sdwan1 = net.addHost('sdwan1')
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sdwan2 = net.addHost('sdwan2')
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# Create switches
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switch1 = net.addSwitch('s1')
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# Connect the hosts and switches
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net.addLink(site1, switch1, bw=10, delay='10ms')
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net.addLink(site2, switch1, bw=5, delay='20ms')
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net.addLink(site3, switch1, bw=8, delay='15ms')
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net.addLink(sdwan1, switch1, bw=100, delay='1ms')
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net.addLink(sdwan2, switch1, bw=100, delay='1ms')
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return net
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def dynamic_path_selection(net, link_qos): # Function to select the best path based on real-time conditions using Dijkstra algorithm with QoS metrics
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# Add a random factor to the QoS metric
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random_range = 4
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for link in link_qos:
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link_qos[link] += random.randint(-random_range, random_range)
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# Perform Dijkstra algorithm to find the best path based on QoS metrics
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def dijkstra(source):
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distance = {node: float('inf') for node in net}
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distance[source] = 0
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queue = [(0, source)]
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while queue:
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dist, node = heapq.heappop(queue)
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if dist > distance[node]:
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continue
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for neighbor, _, link_info in net[node].connectionsTo(net):
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qos = link_qos.get(link_info[0].intf1.name)
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new_dist = dist + qos
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if new_dist < distance[neighbor]:
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distance[neighbor] = new_dist
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heapq.heappush(queue, (new_dist, neighbor))
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return distance
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# Run Dijkstra algorithm from each site to determine the best path
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site1_distance = dijkstra('site1')
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site2_distance = dijkstra('site2')
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site3_distance = dijkstra('site3')
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sdwan1_distance = dijkstra('sdwan1')
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sdwan2_distance = dijkstra('sdwan2')
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# Select the best path based on minimum total QoS distance
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best_path = min(site1_distance, site2_distance, site3_distance, sdwan1_distance, sdwan2_distance,
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key=lambda x: sum(x.values()))
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print("Best path based on QoS metrics:")
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for node, distance in best_path.items():
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print(f"Node: {node}, Total QoS Distance: {distance}")
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def run_topology():
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setLogLevel('info') #Different logging levels are 'info' 'warning' 'error' 'debug'
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topo = create_topology()
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net = Mininet(topo=topo, link=TCLink)
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# net.addController('c0', controller=Controller) #non serve metterlo esplicitamente
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net.start() #Starting the network
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# Define QoS metrics for each link (example values)
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link_qos = {
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'site1-eth0': 8, # QoS value for link site1 -> switch1
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'site2-eth0': 6, # QoS value for link site2 -> switch1
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'site3-eth0': 9, # QoS value for link site3 -> switch1
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'sdwan1-eth0': 10, # QoS value for link sdwan1 -> switch1
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'sdwan2-eth0': 7 # QoS value for link sdwan2 -> switch1
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}
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# Add a random factor to the QoS metric
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random_range = 4
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for link in link_qos:
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link_qos[link] += random.randint(-random_range, random_range)
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if __name__ == '__main__':
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setLogLevel('info')
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# Creazione della rete Mininet
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net = Mininet(controller=PacketCopyController)
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# Creazione degli host e degli switch
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h1 = net.addHost('h1')
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h2 = net.addHost('h2')
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h3 = net.addHost('h3')
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s1 = net.addSwitch('s1')
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# Creazione dei collegamenti
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net.addLink(h1, s1)
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net.addLink(h2, s1)
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net.addLink(h3, s1)
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# Create the plot
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plt.figure()
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plt.xlabel('Time')
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plt.ylabel('Latency (seconds)')
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plt.title('Network Latency')
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# Avvio della rete e assegnazione del controller
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# Add the POX controller
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controller = net.addController(name='controller', target_host='h3', controller=PacketCopyController, ip='127.0.0.1', port=6633)
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net.start()
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controller.start()
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# controller = net.controllers[0]
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# controller.net = net
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# Start the plot animation
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plt.ion()
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plt.show()
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try:
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while True:
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# Update the plot with new latency data
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plt.plot(timestamps, latencies, 'b-')
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plt.draw()
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plt.pause(0.1)
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except KeyboardInterrupt:
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pass
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dynamic_path_selection(net, link_qos)
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CLI(net)
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net.stop() #Stopping the network
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if __name__ == '__main__':
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run_topology()
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net.stop()
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######### Set Network Nodes #########
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N_host steffe0
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N_host steffe1
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N_host steffe2
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N_host steffe3
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N_host steffe4
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N_host steffe5
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N_host steffe6
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N_host steffe7
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N_host steffe8
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N_host steffe9
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N_host steffe10
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N_host steffe11
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N_host steffe12
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N_host steffe13
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N_host steffe14
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N_host steffe15
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N_host steffe16
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N_host steffe17
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N_host steffe18
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N_host steffe19
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N_host steffe20
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N_switch s0
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############################################ Set Network Links ############################################
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SN_link s0 steffe0 1000
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SN_link s0 steffe1 1000
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SN_link s0 steffe2 1000
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SN_link s0 steffe3 1000
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SN_link s0 steffe4 1000
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SN_link s0 steffe5 1000
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SN_link s0 steffe6 1000
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SN_link s0 steffe7 1000
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SN_link s0 steffe8 1000
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SN_link s0 steffe9 1000
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SN_link s0 steffe10 1000
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SN_link s0 steffe11 1000
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SN_link s0 steffe12 1000
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SN_link s0 steffe13 1000
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SN_link s0 steffe14 1000
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SN_link s0 steffe15 1000
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SN_link s0 steffe16 1000
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SN_link s0 steffe17 1000
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SN_link s0 steffe18 1000
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SN_link s0 steffe19 1000
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SN_link s0 steffe20 1000
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