Brandon Heller
51270ce4a2
Now, to reference mininet files, use 'import mininet.mininet'. PYTHONPATH mods are no longer required for installation.
57 lines
1.7 KiB
Python
Executable File
57 lines
1.7 KiB
Python
Executable File
#!/usr/bin/python
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"""
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Create a network and start sshd(8) on each host.
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While something like rshd(8) would be lighter and faster,
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(and perfectly adequate on an in-machine network)
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the advantage of running sshd is that scripts can work
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unchanged on mininet and hardware.
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"""
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import sys ; readline = sys.stdin.readline
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from mininet.mininet import init, Node, createLink, TreeNet, Cli
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def nets( hosts ):
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"Return list of networks (/24) for hosts."
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nets = {}
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for host in hosts:
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net = host.IP().split( '.' )[ : -1 ]
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net = '.'.join( net ) + '.0/24'
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nets[ net ] = True
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return nets.keys()
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def connectToRootNS( network, switch ):
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"Connect hosts to root namespace via switch. Starts network."
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# Create a node in root namespace and link to switch 0
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root = Node( 'root', inNamespace=False )
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createLink( root, switch )
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ip = '10.0.123.1'
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root.setIP( root.intfs[ 0 ], ip, '/24' )
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# Start network that now includes link to root namespace
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network.start()
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# Add routes
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routes = nets( network.hosts )
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intf = root.intfs[ 0 ]
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for net in routes:
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root.cmdPrint( 'route add -net ' + net + ' dev ' + intf )
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def sshd( network ):
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"Start a network, connect it to root ns, and run sshd on all hosts."
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connectToRootNS( network, network.switches[ 0 ] )
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for host in network.hosts: host.cmd( 'sshd -D &' )
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print
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print "*** Hosts are running sshd at the following addresses:"
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print
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for host in network.hosts: print host.name, host.IP()
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print
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print "*** Press return to shut down network: ",
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readline()
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for host in network.hosts: host.cmd( 'kill %sshd')
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network.stop()
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if __name__ == '__main__':
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init()
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network = TreeNet( depth=1, fanout=4, kernel=True )
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sshd( network ) |