#!/usr/bin/python

"""

This example shows how to add an interface (for example a real

hardware interface) to a network after the network is created.

"""

import re

import sys

from mininet.cli import CLI

from mininet.log import setLogLevel, info, error

from mininet.net import Mininet

from mininet.node import RemoteController

from mininet.link import Intf

from mininet.topolib import TreeTopo

from mininet.util import quietRun

def checkIntf( intf ):

"Make sure intf exists and is not configured."

if ( ' %s:' % intf ) not in quietRun( 'ip link show' ):

error( 'Error:', intf, 'does not exist!\n' )

exit( 1 )

ips = re.findall( r'\d+\.\d+\.\d+\.\d+', quietRun( 'ifconfig ' + intf ) )

if ips:

error( 'Error:', intf, 'has an IP address,'

'and is probably in use!\n' )

exit( 1 )

if __name__ == '__main__':

setLogLevel( 'info' )

# try to get hw intf from the command line; by default, use eth1

intfName = sys.argv[ 1 ] if len( sys.argv ) > 1 else 'eth1'

info( '*** Connecting to hw intf: %s' % intfName )

info( '*** Checking', intfName, '\n' )

checkIntf( intfName )

info( '*** Creating network\n' )

#net = Mininet( topo=TreeTopo( depth=1, fanout=2 ), controller=RemoteController('c0', ip='127.0.0.1',port=6653) )

net = Mininet (controller=RemoteController('c0', ip='192.168.137.200', port=6653) )

s1 = net.addSwitch('s1')

h1 = net.addHost('h1', ip='10.0.0.1', mac='00:00:00:00:00:01') #, defaultRoute='via 10.0.2.2')

h2 = net.addHost('h2', ip='10.0.0.2', mac='00:00:00:00:00:02') #, defaultRoute='via 10.0.2.2')

net.addLink(h1, s1)

net.addLink(h2, s1)

#switch = net.switches[ 0 ]

info( '*** Adding hardware interface', intfName, 'to switch',

s1.name, '\n' )

_intf = Intf( intfName, node=s1 )

info( '*** Note: you may need to reconfigure the interfaces for '

'the Mininet hosts:\n', net.hosts, '\n' )

net.start()

CLI( net )

net.stop()