def run_example_alt():
e = simpynet.Environment()
e.add_network(network_alt)
e.run( )
received_frames = e.collectors_values['received_frames']
sent_frames = e.collectors_values['sent_frames']
time_spent = 0
for k in received_frames:
time_spent += (received_frames[k][-1]-sent_frames[k][-1])*TIME_INCREMENT
time_spent = time_spent/NUMBER_OF_PACKETS
print "Each packet sent has spent an average time of " + str(time_spent) + " inside the switch."
def run_example():
e = simpynet.Environment()
e.add_network(network)
e.run( )
time_spent = (numpy.sum(e.collectors_values['data'][0][-1]['Switch0PointToPoint1']) - numpy.sum(e.collectors_values['data'][0][0]['PointToPoint0Switch0']) + numpy.sum(e.collectors_values['data'][0][-1]['Switch0PointToPoint0']) - numpy.sum(e.collectors_values['data'][0][0]['PointToPoint1Switch0']))/NUMBER_OF_PACKETS
print "Each packet sent has spent an average time of " + str(time_spent) + " inside the switch."
spn.physical.plug(r0, l4)
spn.physical.plug(l4, r0)
def tcp_handler(segment):
print 'attivato tcp'
def h_receiver(name, data, trm_delay): # receiver' s handler
def _new_handler(name, data, trm_delay):
yield env.timeout(trm_delay)
return env.process(_new_handler(name, data, trm_delay))
f_send = host_c.add_transport_handler(tcp_handler)
host_b.add_handler('rcv', h_receiver)
def rcv_r():
pass
host_c.default_gateway = spn.Mac('88:B2:2F:54:1A:0F')
def sender():
yield env.timeout(0)
f_send('ciao da host 1', spn.IP('222.222.222.220'))
env.process(sender())
e = spn.Environment()
e.add_network(example2)
e.run()
def example2(env):
""""
example figure 5.17 p. 492 (Computer Networking, 6th edition, Kurose-Ross).
c----l1-----|
|
b----l2--- |so|---l4---ro
|
a----l3-----|
"""
env = spn.Environment()
host_c = spn.Host(env, spn.Mac('1A:23:F9:CD:06:9B'),
spn.IP('222.222.222.220'))
host_b = spn.Host(env, spn.Mac('5C:66:AB:90:75:B1'),
spn.IP('222.222.222.221'))
host_a = spn.Host(env, spn.Mac('49:BD:D2:C7:56:2A'),
spn.IP('222.222.222.222'))
l1 = spn.Link(env,
trm_delay=lambda name, data: 1,
prg_delay=lambda s, r, l: 1)
l2 = spn.Link(env,
trm_delay=lambda name, data: 1,
prg_delay=lambda s, r, l: 1)
l3 = spn.Link(env,
trm_delay=lambda name, data: 1,
prg_delay=lambda s, r, l: 1)
l4 = spn.Link(env,
trm_delay=lambda name, data: 1,
prg_delay=lambda s, r, l: 1)
s0 = spn.Switch(env)
def frw(datagram, mac):
print mac
if mac == spn.Mac('88:B2:2F:54:1A:0F'):
print 'forwanding'
return spn.Mac('5C:66:AB:90:75:B1')
else:
print 'no fornarding'
r0 = spn.Router(env, spn.Mac('88:B2:2F:54:1A:0F'), frw)
spn.physical.plug(host_c, l1)
spn.physical.plug(l1, s0)
spn.physical.plug(host_b, l2)
spn.physical.plug(l2, s0)
spn.physical.plug(host_a, l3)
spn.physical.plug(l3, s0)
spn.physical.plug(r0, l4)
spn.physical.plug(l4, r0)
def tcp_handler(segment):
print 'attivato tcp'
def h_receiver(name, data, trm_delay): # receiver' s handler
def _new_handler(name, data, trm_delay):
yield env.timeout(trm_delay)
return env.process(_new_handler(name, data, trm_delay))
f_send = host_c.add_transport_handler(tcp_handler)
host_b.add_handler('rcv', h_receiver)
def rcv_r():
pass
host_c.default_gateway = spn.Mac('88:B2:2F:54:1A:0F')
def sender():
yield env.timeout(0)
f_send('ciao da host 1', spn.IP('222.222.222.220'))
env.process(sender())
def run_example():
e = simpynet.Environment()
e.add_network(network)
e.run()
