Python pox sdn迷你网，计算udp数据包

我想统计使用pox和openflow实现切换的UDP数据包的数量。
这是我使用的拓扑：

#!/usr/bin/python

"""
Script created by VND - Visual Network Description (SDN version)
"""
from mininet.net import Mininet
from mininet.node import Controller, RemoteController, OVSKernelSwitch, IVSSwitch, UserSwitch
from mininet.link import Link, TCLink
from mininet.cli import CLI
from mininet.log import setLogLevel

def topology():

    "Create a network."
    net = Mininet( controller=Controller, link=TCLink, switch=OVSKernelSwitch )

    print "*** Creating nodes"
    c1 = net.addController( 'c1' )
    s2 = net.addSwitch( 's2', protocols='OpenFlow13', listenPort=6673, mac='00:00:00:00:00:02' )
    h4 = net.addHost( 'h4', mac='00:00:00:00:00:04', ip='10.0.0.4/8' )
    h5 = net.addHost( 'h5', mac='00:00:00:00:00:05', ip='10.0.0.5/8' )
    h6 = net.addHost( 'server', mac='00:00:00:00:00:06', ip='10.0.0.6/8' )

    print "*** Creating links"
    net.addLink(s2, h6)
    net.addLink(s2, h4)
    net.addLink(s2, h5)

    print "*** Starting network"
    net.build()
    c1.start()
    s2.start( [c1] )

    print "*** Running CLI"
    CLI( net )

    print "*** Stopping network"
    net.stop()

if __name__ == '__main__':
    setLogLevel( 'info' )
    topology()

---

我想计算“h4”通过交换机发送到服务器的udp数据包的数量，以及“h5”通过交换机发送到服务器的udp数据包的数量。

对此有任何更新吗？也许wireshark或controller可以帮助您