lantz
f0c726a42f
This helps with virtualenv although it can open up another security hole if you end up using an unexpected python interpreter. Overall it seems to make sense to err on the side of usability but it's good to be aware of security. However, for the remaining utility scripts that require python 2, we explicitly note this with #!/usr/bin/python2.
58 lines
1.6 KiB
Python
Executable File
58 lines
1.6 KiB
Python
Executable File
#!/usr/bin/env python
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"""
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This example shows how to add an interface (for example a real
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hardware interface) to a network after the network is created.
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"""
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import re
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import sys
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from sys import exit # pylint: disable=redefined-builtin
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from mininet.cli import CLI
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from mininet.log import setLogLevel, info, error
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from mininet.net import Mininet
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from mininet.link import Intf
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from mininet.topolib import TreeTopo
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from mininet.util import quietRun
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def checkIntf( intf ):
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"Make sure intf exists and is not configured."
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config = quietRun( 'ifconfig %s 2>/dev/null' % intf, shell=True )
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if not config:
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error( 'Error:', intf, 'does not exist!\n' )
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exit( 1 )
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ips = re.findall( r'\d+\.\d+\.\d+\.\d+', config )
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if ips:
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error( 'Error:', intf, 'has an IP address,'
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'and is probably in use!\n' )
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exit( 1 )
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if __name__ == '__main__':
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setLogLevel( 'info' )
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# try to get hw intf from the command line; by default, use eth1
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intfName = sys.argv[ 1 ] if len( sys.argv ) > 1 else 'eth1'
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info( '*** Connecting to hw intf: %s' % intfName )
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info( '*** Checking', intfName, '\n' )
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checkIntf( intfName )
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info( '*** Creating network\n' )
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net = Mininet( topo=TreeTopo( depth=1, fanout=2 ), waitConnected=True )
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switch = net.switches[ 0 ]
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info( '*** Adding hardware interface', intfName, 'to switch',
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switch.name, '\n' )
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_intf = Intf( intfName, node=switch )
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info( '*** Note: you may need to reconfigure the interfaces for '
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'the Mininet hosts:\n', net.hosts, '\n' )
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net.start()
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CLI( net )
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net.stop()
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