def prt3():
n1, n2, net = setupNetwork('../networks/1-3.txt')
# send three packets at time 0
p1 = packet.Packet(destination_address=n2.get_address('n1'),
ident=1,
protocol='delay',
length=1000)
Sim.scheduler.add(delay=0, event=p1, handler=n1.send_packet)
p2 = packet.Packet(destination_address=n2.get_address('n1'),
ident=1,
protocol='delay',
length=1000)
Sim.scheduler.add(delay=0, event=p2, handler=n1.send_packet)
p3 = packet.Packet(destination_address=n2.get_address('n1'),
ident=1,
protocol='delay',
length=1000)
Sim.scheduler.add(delay=0, event=p3, handler=n1.send_packet)
# Late packet
p4 = packet.Packet(destination_address=n2.get_address('n1'),
ident=1,
protocol='delay',
length=1000)
Sim.scheduler.add(delay=2, event=p4, handler=n1.send_packet)
def broadcast_routing_table(self, event):
distance_vector_message = self.routing_table.get_routing_table()
distance_vector_message['hostname'] = self.node.hostname
routing_table_packet = packet.Packet(destination_address=0,
ident=0,
ttl=1,
protocol='dvrouting',
body=distance_vector_message)
if self.broadcast_count < 100:
Sim.scheduler.add(delay=0,
event=routing_table_packet,
handler=self.node.send_packet)
Sim.scheduler.add(delay=30,
event="",
handler=self.broadcast_routing_table)
self.broadcast_count += 1
else:
print "----------> ENDING <----------"
if self.node.hostname == 'n1':
Sim.scheduler.add(delay=0,
event=None,
handler=n1.get_link('n2').down)
Sim.scheduler.add(delay=0,
event=None,
handler=n1.get_link('n3').down)
print "---> Deactivated link <---"
def prt2():
n1, n2, net = setupNetwork('../networks/1-2.txt')
# send one packet
p = packet.Packet(destination_address=n2.get_address('n1'),
ident=1,
protocol='delay',
length=1000)
Sim.scheduler.add(delay=0, event=p, handler=n1.send_packet)
def handle(self,event):
# quit if done
now = Sim.scheduler.current_time()
if (now - self.start) > self.duration:
return
# generate a packet
self.ident += 1
p = packet.Packet(destination_address=destination,ident=self.ident,protocol='delay',length=1000)
Sim.scheduler.add(delay=0, event=p, handler=self.node.send_packet)
# schedule the next time we should generate a packet
Sim.scheduler.add(delay=random.expovariate(self.load), event='generate', handler=self.handle)
def broadcast_routing_table(self, event):
routing_table = self.routing_table.get_routing_table()
hostname = self.node.hostname
data_dictionary = dict()
data_dictionary['hostname'] = hostname
data_dictionary['routing_table'] = routing_table
routing_table_packet = packet.Packet(destination_address=0,
ident=0,
ttl=1,
protocol='dvrouting',
body=data_dictionary)
Sim.scheduler.add(delay=0,
event=routing_table_packet,
handler=self.node.send_packet)
if self.broadcast_count < 200:
if self.broadcast_count == 75 and self.node.hostname == 'n1':
Sim.scheduler.add(delay=0,
event=None,
handler=n1.get_link('n4').down)
Sim.scheduler.add(delay=0,
event=None,
handler=n4.get_link('n1').down)
print "%s - ----> DISABLED LINKS <----" % Sim.scheduler.current_time(
)
elif self.broadcast_count == 150 and self.node.hostname == 'n1':
Sim.scheduler.add(delay=0,
event=None,
handler=n1.get_link('n4').up)
Sim.scheduler.add(delay=0,
event=None,
handler=n4.get_link('n1').up)
print "%s - ----> ENABLED LINKS <----" % Sim.scheduler.current_time(
)
Sim.scheduler.add(delay=30,
event="",
handler=self.broadcast_routing_table)
self.broadcast_count += 1
else:
# print
print "(%s) --------> ENDING <--------" % Sim.scheduler.current_time(
)
# setup broadcast application
b1 = BroadcastApp(n1)
n1.add_protocol(protocol="broadcast", handler=b1)
b2 = BroadcastApp(n2)
n2.add_protocol(protocol="broadcast", handler=b2)
b3 = BroadcastApp(n3)
n3.add_protocol(protocol="broadcast", handler=b3)
b4 = BroadcastApp(n4)
n4.add_protocol(protocol="broadcast", handler=b4)
b5 = BroadcastApp(n5)
n5.add_protocol(protocol="broadcast", handler=b5)
# send a broadcast packet from 1 with TTL 2, so everyone should get it
p = packet.Packet(source_address=n1.get_address('n2'),
destination_address=0,
ident=1,
ttl=2,
protocol='broadcast',
length=100)
Sim.scheduler.add(delay=0, event=p, handler=n1.send_packet)
# send a broadcast packet from 1 with TTL 1, so just nodes 2 and 3
# should get it
p = packet.Packet(source_address=n1.get_address('n2'),
destination_address=0,
ident=2,
ttl=1,
protocol='broadcast',
length=100)
Sim.scheduler.add(delay=1, event=p, handler=n1.send_packet)
# send a broadcast packet from 3 with TTL 1, so just nodes 1, 4, and 5
# setup forwarding entries
a2 = n2.get_address('n1')
a1 = n1.get_address('n2')
a3 = n3.get_address('n2')
n1.add_forwarding_entry(address=a2, link=n1.links[0])
n2.add_forwarding_entry(address=a1, link=n2.links[0])
n2.add_forwarding_entry(address=a3, link=n2.links[1])
n3.add_forwarding_entry(address=a2, link=n3.links[0])
# if packet is going from n1 -> n3
n1.add_forwarding_entry(address=a3, link=n1.links[0])
packetCount = 100
# setup app
d = DelayHandler(packetCount, outputFile)
net.nodes['n1'].add_protocol(protocol="delay", handler=d)
net.nodes['n2'].add_protocol(protocol="delay", handler=d)
net.nodes['n3'].add_protocol(protocol="delay", handler=d)
for i in range(0, packetCount):
p = packet.Packet(destination_address=a3,
ident=i,
protocol='delay',
length=1000)
Sim.scheduler.add(delay=0, event=p, handler=n1.send_packet)
# run the simulation
Sim.scheduler.run()
n5.add_protocol(protocol="data",handler=HandleDataApp(n5))
# setup dvrouting application
b1 = DVRoutingApp(n1)
n1.add_protocol(protocol="dvrouting",handler=b1)
b2 = DVRoutingApp(n2)
n2.add_protocol(protocol="dvrouting",handler=b2)
b3 = DVRoutingApp(n3)
n3.add_protocol(protocol="dvrouting",handler=b3)
b4 = DVRoutingApp(n4)
n4.add_protocol(protocol="dvrouting",handler=b4)
b5 = DVRoutingApp(n5)
n5.add_protocol(protocol="dvrouting",handler=b5)
# send one packet from n1 to n5
p = packet.Packet(destination_address=n5.get_address('n1'),protocol='data')
Sim.scheduler.add(delay=5, event=p, handler=n1.send_packet)
# send one packet from n4 to n1
p = packet.Packet(destination_address=n1.get_address('n5'),protocol='data')
Sim.scheduler.add(delay=7, event=p, handler=n4.send_packet)
# take the link down between n1 and n5
Sim.scheduler.add(delay=10, event=None, handler=n1.get_link('n5').down)
Sim.scheduler.add(delay=10, event=None, handler=n5.get_link('n1').down)
# send one packet from n1 to n5
p = packet.Packet(destination_address=n5.get_address('n1'),protocol='data')
Sim.scheduler.add(delay=130, event=p, handler=n1.send_packet)
# send one packet from n4 to n1
def receive_packet(self, packet):
print packet.created, packet.ident, Sim.scheduler.current_time()
if __name__ == '__main__':
# parameters
Sim.scheduler.reset()
# setup network
net = Network('p1.2-network.txt')
# setup routes
n1 = net.get_node('n1')
n2 = net.get_node('n2')
n1.add_forwarding_entry(address=n2.get_address('n1'), link=n1.links[0])
n2.add_forwarding_entry(address=n1.get_address('n2'), link=n2.links[0])
# setup app
d = DelayHandler()
net.nodes['n2'].add_protocol(protocol="delay", handler=d)
# send one packet
p = packet.Packet(destination_address=n2.get_address('n1'),
ident=1,
protocol='delay',
length=1000)
Sim.scheduler.add(delay=0, event=p, handler=n1.send_packet)
# run the simulation
Sim.scheduler.run()
n3.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n3))
n4.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n4))
n5.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n5))
n6.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n6))
n7.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n7))
n8.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n8))
n9.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n9))
n10.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n10))
n11.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n11))
n12.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n12))
n13.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n13))
n14.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n14))
n15.add_protocol(protocol="dvrouting", handler=DVRoutingApp(n15))
# send one packet from n1 to n7
p = packet.Packet(destination_address=n7.get_address('n4'),
protocol='data')
Sim.scheduler.add(delay=5, event=p, handler=n1.send_packet)
# take the link down between n4 and n7
Sim.scheduler.add(delay=10, event=None, handler=n4.get_link('n7').down)
Sim.scheduler.add(delay=10, event=None, handler=n7.get_link('n4').down)
# send another packet from n1 to n7
p = packet.Packet(destination_address=n7.get_address('n4'),
protocol='data')
Sim.scheduler.add(delay=140, event=p, handler=n1.send_packet)
# take the link down between n5 and n8
Sim.scheduler.add(delay=150, event=None, handler=n8.get_link('n5').down)
Sim.scheduler.add(delay=150, event=None, handler=n5.get_link('n8').down)
# parameters
Sim.scheduler.reset()
# setup network
net = Network('p1.3-network.txt')
# setup routes
n1 = net.get_node('n1')
n2 = net.get_node('n2')
n1.add_forwarding_entry(address=n2.get_address('n1'),link=n1.links[0])
n2.add_forwarding_entry(address=n1.get_address('n2'),link=n2.links[0])
# setup app
d = DelayHandler()
net.nodes['n2'].add_protocol(protocol="delay",handler=d)
# send three packets at t=0
p1 = packet.Packet(destination_address=n2.get_address('n1'),ident=1,protocol='delay',length=1000)
p2 = packet.Packet(destination_address=n2.get_address('n1'),ident=2,protocol='delay',length=1000)
p3 = packet.Packet(destination_address=n2.get_address('n1'),ident=3,protocol='delay',length=1000)
Sim.scheduler.add(delay=0, event=p1, handler=n1.send_packet)
Sim.scheduler.add(delay=0, event=p2, handler=n1.send_packet)
Sim.scheduler.add(delay=0, event=p3, handler=n1.send_packet)
# send one packet at t=2
p4 = packet.Packet(destination_address=n2.get_address('n1'),ident=4,protocol='delay',length=1000)
Sim.scheduler.add(delay=2, event=p4, handler=n1.send_packet)
# run the simulation
Sim.scheduler.run()
def queuePackets(count, n1, n2, n3):
for i in range(count):
p = packet.Packet(destination_address=n3.get_address('n2'),ident=1,protocol='delay',length=1000)
Sim.scheduler.add(delay=0, event=p, handler=n1.send_packet)
n15.add_protocol(protocol="printer", handler=p15)
d1.broadcast_routing_table("")
d2.broadcast_routing_table("")
d3.broadcast_routing_table("")
d4.broadcast_routing_table("")
d5.broadcast_routing_table("")
d6.broadcast_routing_table("")
d7.broadcast_routing_table("")
d8.broadcast_routing_table("")
d9.broadcast_routing_table("")
d10.broadcast_routing_table("")
d11.broadcast_routing_table("")
d12.broadcast_routing_table("")
d13.broadcast_routing_table("")
d14.broadcast_routing_table("")
d15.broadcast_routing_table("")
p = packet.Packet(protocol="printer",
source_address=n11.get_address('n4'),
destination_address=n10.get_address('n1'),
body="Hello world!")
Sim.scheduler.add(delay=900, event=p, handler=n11.send_packet)
Sim.scheduler.add(delay=2800, event=p, handler=n11.send_packet)
Sim.scheduler.add(delay=5500, event=p, handler=n11.send_packet)
# run the simulation
Sim.scheduler.run()
