from mininet.topo import Topo

# Usage example:
# sudo mn --custom he2-mn-topo.py --topo he2 --link tc --x


class H1Topo(Topo):
    "Simple topology for Home Exam 1."

    def __init__(self):
        "Set up our custom topo."

        # Initialize topology
        Topo.__init__(self)

        # Add hosts 
        A = self.addHost('A')
        B = self.addHost('B')
        C = self.addHost('C')

        # Add links
        self.addLink(A, B, bw=10, delay='10ms', loss=0.0, use_tbf=False)
        self.addLink(B, C, bw=10, delay='10ms', loss=0.0, use_tbf=False)


class H2Topo( Topo ):
    "Larger topology for Home Exam 2."

    def __init__( self ):
        "Set up our custom topo."

        # Initialize topology
        Topo.__init__( self )

        # Add hosts
        A = self.addHost('A')
        B = self.addHost('B')
        C = self.addHost('C')
        D = self.addHost('D')
        E = self.addHost('E')

        # Add links
        self.addLink(A, B, bw=10, delay='10ms', loss=0.0, use_tbf=False)
        self.addLink(B, C, bw=10, delay='10ms', loss=0.0, use_tbf=False)
        self.addLink(B, D, bw=10, delay='10ms', loss=0.0, use_tbf=False)
        self.addLink(C, D, bw=10, delay='10ms', loss=0.0, use_tbf=False)
        self.addLink(D, E, bw=10, delay='10ms', loss=0.0, use_tbf=False)


topos = { 'he1': ( lambda: H1Topo() ),
          'he2': ( lambda: H2Topo() ), }