Mininet添加iperfmulti功能

在mininet中增加新功能主要分为3步：

1. 修改net.py增加函数实体；

2. 修改cli.py，增加对应do_function函数，用于命令解析；

3. 修改mn函数，用于声明命令。

net.py和cli.py文件均在mininet/mininet目录，mn文件在在mininet/bin目录下.

修改cli.py

def do_iperfmulti( self, line ):
   		args=line.split()
		if len(args) == 1:
			udpBw = args[ 0 ]
			self.mn.iperfMulti(udpBw)
		elif len(args)== 2:
			udpBw = args[ 0 ]
			period = args[ 1 ]
			err = False
			self.mn.iperfMulti(udpBw,int(period))
		else:
			error('invalid number of args: iperfmulti udpBw \n' +'udpBw examples: 1M\n')

 修改net.py

def iperfMulti( self, load, period=5):
		""Multi iperf UDP test between nodes"""
		base_port = 5001
		#output(load)
		server_list = []
		client_list = [h for h in self.hosts]
		host_list = []
		host_list = [h for h in self.hosts]
		
		cli_outs = []
		ser_outs = []		
	
		_len = len(host_list)
		#output(_len)
		for i in xrange(0, _len):
			client = host_list[i]
			server = client			
			while( server == client ):
				server = random.choice(host_list)
			server_list.append(server)			
			self.iperf_single(hosts = [client, server], udpBw=load, period=period, port=base_port)
			sleep(.05)
			base_port += 1
		
		sleep(period)	

 

def iperf_single( self,hosts=None, udpBw=5, period=5, port=5001):
        """"""
        if not hosts:
            return
        else:
            assert len( hosts ) == 2
        client, server = hosts
        filename = client.name+'.out'
        filenameserver = server.name+'.out'
        delayname = client.name+'-'+server.name+'.delay'
        output( '***testing bandwidth between ' )
        output( "%s and %s\n" % ( client.name, server.name ) )
        iperfArgs = 'iperf -u'    
        print "****start server******"
        server.cmd( iperfArgs + '-s' + ' >> /home/zhao/log/' + 'server-'+filenameserver + '&')
        print "****start client******"
        client.cmd(iperfArgs + '-t ' + str(period) + ' -c ' + server.IP() + ' -b '+str(udpBw)+'M'+ ' >> /home/zhao/log/'+ 'client-' + filename +'&')
       

 

 

修改mn

TESTS = [ 'cli', 'build', 'pingall', 'pingpair', 'iperf', 'all', 'iperfudp', 'none', 'iperfmulti' ]

ALTSPELLING = { 'pingall': 'pingAll',
                'pingpair': 'pingPair',
                'iperfudp': 'iperfUdp',
                'iperfUDP': 'iperfUdp',
		'iperfmulti': 'iperfmulti' }

 输入以下命令重新编译安装mininet core

  sudo ./mininet/util/install.sh -n

重启mininet，输入iperf，可使用table补全iperfmulti，从而可使用iperfmulti进行测试