#!/usr/bin/env python
"""p3-template.py:

    This mininet script creates a linear routed multi-hop topology:

        2001:638:709:a::/64 2001:638:709:f::/64 2001:638:709:b::/64
       .------------------..------------------..------------------.

      h1 ------ s1 ------ r1 ------ s0 ------ r2 ------ s2 ------ h2
        eth0          eth0  eth1          eth0  eth1          eth0

     Assign the following IPv6 addresses and prefixes:

     h1-eth0  2001:638:709:a::1/64
     r1-eth0  2001:638:709:a::f/64
     r1-eth1  2001:638:709:f::1/64
     r2-eth0  2001:638:709:f::2/64
     r2-eth1  2001:638:709:b::f/64
     h2-eth0  2001:638:709:b::1/64

     Debugging hints:

     - If you get a 'network unreachable' error, then most likely a
       forwarding table entry is missing somewhere or wrong.
     - If you get a 'destination unreachable' error, then most likely
       neighbor discovery failed somewhere.
     - Use the 'ip -6 address', 'ip -6 route', and 'ip -6 neigh'
       commands to inspect the forwarding tables and the neighbor
       mapping tables.
     - If pings from h1 to h2 do not work, try to ping r1 from h1 and
       try to ping r1 from h2. (Test whether the links work first.)
     - You can print the result of the configuration commands to see
       whether any errors occurred.
     - You can run tcpdump (or even wireshark) to capture packets in
       order to see what is going on.
"""

from mininet.cli import CLI
from mininet.net import Mininet
from mininet.nodelib import LinuxBridge
from mininet.log import setLogLevel





if __name__ == '__main__':
    setLogLevel('info')

    net = Mininet(switch=LinuxBridge, controller=None)

    h1 = net.addHost('h1', ip=None)
    h2 = net.addHost('h2', ip=None)
    r1 = net.addHost('r1', ip=None)
    r2 = net.addHost('r2', ip=None)

    s0 = net.addSwitch('s0')
    s1 = net.addSwitch('s1')
    s2 = net.addSwitch('s2')

    # enabling forwarding:
    r1.cmd('sysctl -w net.ipv6.conf.all.forwarding=1')
    r2.cmd('sysctl -w net.ipv6.conf.all.forwarding=1')

    net.addLink(h1, s1)
    net.addLink(s1, r1)
    net.addLink(r1, s0)
    net.addLink(s0, r2)
    net.addLink(r2, s2)
    net.addLink(s2, h2)


    print h1.cmd("ip -V")



    # assigning IP addresses:
    h1.cmd("ip addr add 2001:638:709:a::1/64 dev h1-eth0")  # h1 -- s1
    r1.cmd("ip addr add 2001:638:709:a::f/64 dev r1-eth0")  # s1 -- r1
    r1.cmd("ip addr add 2001:638:709:f::1/64 dev r1-eth1")  # r1 -- s0
    r2.cmd("ip addr add 2001:638:709:f::2/64 dev r2-eth0")  # s0 -- r2
    r2.cmd("ip addr add 2001:638:709:b::f/64 dev r2-eth1")  # r2 -- s2
    h2.cmd("ip addr add 2001:638:709:b::1/64 dev h2-eth0")  # s2 -- h2

    # adding default routes:
    h1.cmd("ip -6 route add 2001:638:709::/48 via 2001:638:709:a::f dev h1-eth0")
    h2.cmd("ip -6 route add 2001:638:709::/48 via 2001:638:709:b::f dev h2-eth0")
    r1.cmd("ip -6 route add 2001:638:709:b::/64 via 2001:638:709:f::2 dev r1-eth1")
    r2.cmd("ip -6 route add 2001:638:709:a::/64 via 2001:638:709:f::1 dev r2-eth0")

    net.start()
    CLI(net)
    net.stop()






# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~






#!/usr/bin/env python

from mininet.cli import CLI
from mininet.net import Mininet
from mininet.nodelib import LinuxBridge
from mininet.log import setLogLevel


if __name__ == '__main__':
    setLogLevel('info')

    net = Mininet(switch=LinuxBridge, controller=None)

    h1 = net.addHost('h1',ip=None)
    h2 = net.addHost('h2',ip=None)

    s0 = net.addSwitch('s0')
    s1 = net.addSwitch('s1')
    s2 = net.addSwitch('s2')
    s3 = net.addSwitch('s3')

    r1 = net.addHost('r1',ip=None)
    r2 = net.addHost('r2',ip=None)
    r3 = net.addHost('r3',ip=None)
    r4 = net.addHost('r4',ip=None)

    r1.cmd("sysctl -w net.ipv6.conf.all.forwarding=1")
    r2.cmd("sysctl -w net.ipv6.conf.all.forwarding=1")
    r3.cmd("sysctl -w net.ipv6.conf.all.forwarding=1")
    r4.cmd("sysctl -w net.ipv6.conf.all.forwarding=1")

    net.addLink(h1,s1)
    net.addLink(h2,s2)
    net.addLink(s0,r1, intfName2='r1-eth1')
    net.addLink(s1,r1, intfName2='r1-eth0')
    net.addLink(s0,r2, intfName2='r2-eth0')
    net.addLink(s2,r2, intfName2='r2-eth1')
    net.addLink(s1,r3, intfName2='r3-eth0')
    net.addLink(s3,r3, intfName2='r3-eth1')
    net.addLink(s3,r4, intfName2='r4-eth0')
    net.addLink(s2,r4, intfName2='r4-eth1')

    print h1.cmd('ip -V')

    h1.cmd("ip -6 addr add 2001:638:709:a::1/64 dev h1-eth0")
    h1.cmd("ip route add 2001:638:709:f::/64 via 2001:638:709:a::f dev h1-eth0")
    h1.cmd("ip route add 2001:638:709:b::/64 via 2001:638:709:a::f dev h1-eth0")

    h2.cmd("ip -6 addr add 2001:638:709:b::1/64 dev h2-eth0")
    h2.cmd("ip route add 2001:638:709:e::/64 via 2001:638:709:b::e dev h2-eth0")
    h2.cmd("ip route add 2001:638:709:a::/64 via 2001:638:709:b::e dev h2-eth0")

    r1.cmd("ip -6 addr add 2001:638:709:a::f/64 dev r1-eth0")
    r1.cmd("ip -6 addr add 2001:638:709:f::1/64 dev r1-eth1")
    r1.cmd("ip -6 route add 2001:638:709:b::/64 dev r1-eth1 via 2001:638:709:f::2")

    r2.cmd("ip addr add 2001:638:709:f::2/64 dev r2-eth0")
    r2.cmd("ip addr add 2001:638:709:b::f/64 dev r2-eth1")
    r2.cmd("ip route add 2001:638:709:a::/64 via 2001:638:709:f::1 dev r2-eth0")

    r3.cmd("ip addr add 2001:638:709:a::e/64 dev r3-eth0")
    r3.cmd("ip addr add 2001:638:709:e::1/64 dev r3-eth1")
    r3.cmd("ip route add 2001:638:709:b::/64 via 2001:638:709:e::2 dev r3-eth1")

    r4.cmd("ip addr add 2001:638:709:e::2/64 dev r4-eth0")
    r4.cmd("ip addr add 2001:638:709:b::e/64 dev r4-eth1")
    r4.cmd("ip route add 2001:638:709:a::/64 via 2001:638:709:e::1 dev r4-eth0")

    net.start()
    CLI(net)
    net.stop()