Python network.Network类代码示例

    def run(self):
        # parameters
        Sim.scheduler.reset()
        Sim.set_debug(True)

        # setup network
        net = Network('../networks/one-hop.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 transport
        t1 = Transport(n1)
        t2 = Transport(n2)

        # setup application
        a = AppHandler(self.filename)

        # setup connection
        c1 = StopAndWait(t1,n1.get_address('n2'),1,n2.get_address('n1'),1,a)
        c2 = StopAndWait(t2,n2.get_address('n1'),1,n1.get_address('n2'),1,a)

        # send a file
        with open(self.filename,'r') as f:
            while True:
                data = f.read(1000)
                if not data:
                    break
                Sim.scheduler.add(delay=0, event=data, handler=c1.send)

        # run the simulation
        Sim.scheduler.run()

def main():
    # parameters
    Sim.scheduler.reset()

    # setup network
    net = Network('../networks/one-hop.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)

    # setup packet generator
    destination = n2.get_address('n1')
    max_rate = 1000000 // (1000 * 8)
    load = 0.8 * max_rate
    g = Generator(node=n1, destination=destination, load=load, duration=10)
    Sim.scheduler.add(delay=0, event='generate', handler=g.handle)

    # run the simulation
    Sim.scheduler.run()

def main():
    # parameters
    Sim.scheduler.reset()

    # setup network
    net = Network('../networks/five-nodes.txt')

    # get nodes
    n1 = net.get_node('n1')
    n2 = net.get_node('n2')
    n3 = net.get_node('n3')
    n4 = net.get_node('n4')
    n5 = net.get_node('n5')

    # 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(
        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(
        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
    # should get it
    p = Packet(
        source_address=n3.get_address('n1'),
        destination_address=0,
        ident=3, ttl=1, protocol='broadcast', length=100)
    Sim.scheduler.add(delay=2, event=p, handler=n3.send_packet)

    # run the simulation
    Sim.scheduler.run()

class MainNetworkView(GeographicalView, NetworkView):
    
    subtype = 'network'
    menu_type = 'network'

    def __init__(self, controller):
        self.network = Network(self)
        super().__init__(controller)
        
    # given a graphical node, retrieves all attached graphical links    
    def attached_glinks(self, gnode):
        for link in self.network.attached_links(gnode.node):
            if 'vc' in link.subtype:
                continue
            yield link.glink[self]
        
    def draw_objects(self, *objects):
        for obj in objects:
            if obj.class_type == 'node' and self not in obj.gnode:
                GraphicalNetworkNode(self, obj)
            if obj.class_type == 'link' and self not in obj.glink:
                if 'vc' in obj.subtype:
                    continue
                self.draw_objects(obj.source, obj.destination)
                GraphicalLink(self, obj)
        
    def dropEvent(self, event):
        pos = self.mapToScene(event.pos())
        geo_pos = self.world_map.to_geographical_coordinates(pos.x(), pos.y())
        if event.mimeData().hasFormat('application/x-dnditemdata'):
            new_gnode = GraphicalNetworkNode(self)
            new_gnode.setPos(pos)
            # update the nodes coordinates at creation
            new_gnode.node.longitude, new_gnode.node.latitude = geo_pos

    def run(self):
        # parameters
        Sim.scheduler.reset()

        if "a" in self.debug:
            Sim.set_debug('AppHandler')
        if "t" in self.debug:
            Sim.set_debug('TCP')

        # setup network
        net = Network('networks/one-hop.txt')
        net.loss(self.loss)

        # 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 transport
        t1 = Transport(n1)
        t2 = Transport(n2)

        # setup application
        a = AppHandler(self.inputfile)

        # setup connection
        c1 = TCP(t1,n1.get_address('n2'),1,n2.get_address('n1'),1,a,window=self.window,type=self.type)
        c2 = TCP(t2,n2.get_address('n1'),1,n1.get_address('n2'),1,a,window=self.window,type=self.type)

        global original_size
        f = open(self.inputfile, "rb")
        try:
            data = f.read(1000)
            while data != "":
                original_size += len(data)
                Sim.scheduler.add(delay=0, event=data, handler=c1.send)
                data = f.read(1000)
        finally:
            f.close()

        # run the simulation
        Sim.scheduler.run()

        plotter.plot(self.sequencefile);

    def run(self):
        # parameters
        Sim.scheduler.reset()

        if hasattr(self, 'debug') and "a" in self.debug:
            Sim.set_debug('AppHandler')
        if hasattr(self, 'debug') and "t" in self.debug:
            Sim.set_debug('TCP')

        # setup network
        net = Network('networks/one-hop.txt')
        net.loss(self.loss)

        # 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 transport
        t1 = Transport(n1)
        t2 = Transport(n2)

        # setup application
        a = AppHandler(self.filename)

        # setup connection
        c1 = TCP(t1,n1.get_address('n2'),1,n2.get_address('n1'),1,a,dynamic_rto=self.dynamic_rto)
        c2 = TCP(t2,n2.get_address('n1'),1,n1.get_address('n2'),1,a,dynamic_rto=self.dynamic_rto)

        f = open(self.filename, "rb")
        try:
            data = f.read(1000)
            while data != "":
                Sim.scheduler.add(delay=0, event=data, handler=c1.send)
                data = f.read(1000)
        finally:
            f.close()

        # run the simulation
        Sim.scheduler.run()

    def run(self):
        # parameters
        Sim.scheduler.reset()
        Sim.set_debug('AppHandler')
        Sim.set_debug('TCP')

        # setup network
        net = Network('../networks/one-hop.txt')
        net.loss(self.loss)

        # 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])  # n1 -> n2
        n2.add_forwarding_entry(address=n1.get_address('n2'),link=n2.links[0])  # n1 <- n2

        # setup transport
        t1 = Transport(n1)
        t2 = Transport(n2)

        # setup application
        tcp_flows = 1
        a1 = AppHandler(self.filename, 1)

        # setup connection
        c1a = TCP(t1, n1.get_address('n2'), 1, n2.get_address('n1'), 1, 3000, a1)
        c2a = TCP(t2, n2.get_address('n1'), 1, n1.get_address('n2'), 1, 3000, a1)

        # send a file
        with open(self.filename,'r') as f:
            while True:
                data = f.read(1000)
                if not data:
                    break
                Sim.scheduler.add(delay=0, event=data, handler=c1a.send)

        # run the simulation
        Sim.scheduler.run()
        return tcp_flows

def main():
    # parameters
    Sim.scheduler.reset()

    # setup network
    net = Network('../networks/one-hop.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(destination_address=n2.get_address('n1'), ident=1, protocol='delay', length=1000)
    Sim.scheduler.add(delay=0, event=p, handler=n1.send_packet)

    # take the link down
    Sim.scheduler.add(delay=1, event=None, handler=n1.get_link('n2').down)

    # send one packet (it won't go through)
    p = Packet(destination_address=n2.get_address('n1'), ident=1, protocol='delay', length=1000)
    Sim.scheduler.add(delay=1.1, event=p, handler=n1.send_packet)

    # bring the link up
    Sim.scheduler.add(delay=2, event=None, handler=n1.get_link('n2').up)

    # send one packet (and now it goes through)
    p = Packet(destination_address=n2.get_address('n1'), ident=1, protocol='delay', length=1000)
    Sim.scheduler.add(delay=2.1, event=p, handler=n1.send_packet)

    # run the simulation
    Sim.scheduler.run()

            results[self.percentage] = []
        results[self.percentage].append(packet.queueing_delay)

if __name__ == '__main__':
    # parameters

    percentages = [.1, .2, .3, .4, .5, .6, .7, .75, .8, .9, .95, .98]

    max_rate = 1000000/(1000*8)

    for percentage in percentages:
        for x in range (0, 3):
            Sim.scheduler.reset()

            # setup network
            net = Network('networks/one-hop.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(percentage=percentage)
            net.nodes['n2'].add_protocol(protocol="delay",handler=d)

            # setup packet generator
            destination = n2.get_address('n1')
            load = percentage*max_rate
            g = Generator(node=n1,destination=destination,load=load,duration=10)

    def run(self):
        # parameters
        Sim.scheduler.reset()
        Sim.set_debug('AppHandler')
        Sim.set_debug('TCP')

        # setup network
        # net = Network('../networks/one-hop.txt')
        net = Network('../networks/four-nodes.txt')
        net.loss(self.loss)

        # setup routes
        n1 = net.get_node('n1')
        n2 = net.get_node('n2')
        n3 = net.get_node('n3')
        n4 = net.get_node('n4')

        n1.add_forwarding_entry(address=n2.get_address('n1'),link=n1.links[0])  # n1 -> n2
        n2.add_forwarding_entry(address=n1.get_address('n2'),link=n2.links[0])  # n1 <- n2

        n2.add_forwarding_entry(address=n3.get_address('n2'),link=n2.links[1])  # n2 -> n3
        n3.add_forwarding_entry(address=n2.get_address('n3'),link=n3.links[0])  # n2 <- n3

        n2.add_forwarding_entry(address=n4.get_address('n2'),link=n2.links[2])  # n2 -> n4
        n4.add_forwarding_entry(address=n2.get_address('n4'),link=n4.links[0])  # n2 <- n4

        n1.add_forwarding_entry(address=n4.get_address('n2'),link=n1.links[0])  # n1 -> n2 -> n4
        n3.add_forwarding_entry(address=n4.get_address('n2'),link=n3.links[0])  # n3 -> n2 -> n4
        n4.add_forwarding_entry(address=n1.get_address('n2'),link=n4.links[0])  # n4 -> n2 -> n1
        n4.add_forwarding_entry(address=n3.get_address('n2'),link=n4.links[0])  # n4 -> n2 -> n1

        # setup transport
        t1 = Transport(n1)
        t3 = Transport(n3)
        t4 = Transport(n4)

        # setup application
        tcp_flows = 2
        a1 = AppHandler(self.filename,1)
        a2 = AppHandler(self.filename,2)
        # a3 = AppHandler(self.filename, 3)
        # a4 = AppHandler(self.filename, 4)
        # a5 = AppHandler(self.filename, 5)

        # setup connection
        # c1a = TCP(t1, n1.get_address('n2'), 1, n2.get_address('n1'), 1, a1)
        # c2a = TCP(t2, n2.get_address('n1'), 1, n1.get_address('n2'), 1, a1)

        ### 4-node configuration
        c1a = TCP(t1, n1.get_address('n2'), 1, n4.get_address('n2'), 1, a1)
        c2a = TCP(t4, n4.get_address('n2'), 1, n1.get_address('n2'), 1, a1)

        c1b = TCP(t3, n3.get_address('n2'), 2, n4.get_address('n2'), 2, a2)
        c2b = TCP(t4, n4.get_address('n2'), 2, n3.get_address('n2'), 2, a2)

        # c1b = TCP(t1, n1.get_address('n2'), 2, n2.get_address('n1'), 2, a2)
        # c2b = TCP(t2, n2.get_address('n1'), 2, n1.get_address('n2'), 2, a2)

        # c1c = TCP(t1, n1.get_address('n2'), 3, n2.get_address('n1'), 3, a3)
        # c2c = TCP(t2, n2.get_address('n1'), 3, n1.get_address('n2'), 3, a3)
        #
        # c1d = TCP(t1, n1.get_address('n2'), 4, n2.get_address('n1'), 4, a4)
        # c2d = TCP(t2, n2.get_address('n1'), 4, n1.get_address('n2'), 4, a4)
        #
        # c1e = TCP(t1, n1.get_address('n2'), 5, n2.get_address('n1'), 5, a5)
        # c2e = TCP(t2, n2.get_address('n1'), 5, n1.get_address('n2'), 5, a5)

        # send a file
        with open(self.filename,'r') as f:
            while True:
                data = f.read(1000)
                if not data:
                    break
                Sim.scheduler.add(delay=0, event=data, handler=c1a.send)
                Sim.scheduler.add(delay=0, event=data, handler=c1b.send)
                # Sim.scheduler.add(delay=0, event=data, handler=c1a.send)
                # Sim.scheduler.add(delay=0.1, event=data, handler=c1b.send)
                # Sim.scheduler.add(delay=0.2, event=data, handler=c1c.send)
                # Sim.scheduler.add(delay=0.3, event=data, handler=c1d.send)
                # Sim.scheduler.add(delay=0.4, event=data, handler=c1e.send)


        # run the simulation
        Sim.scheduler.run()
        return tcp_flows

        if packet.ident == self.packetCount - 1:
            self.endOutput()

    def endOutput(self):
        outputFile.close()


if __name__ == "__main__":
    outputFile = open("output-problem2-1b.txt", "w")

    # parameters
    Sim.scheduler.reset()

    # setup network
    net = Network("config-3n-1Gbps-1Gbps-100ms-100ms.txt")

    # setup routes
    n1 = net.get_node("n1")
    n2 = net.get_node("n2")
    n3 = net.get_node("n3")

    # 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])

    def run(self):
        # parameters
        Sim.scheduler.reset()
        #Sim.set_debug('AppHandler')
        #Sim.set_debug('TCP')
        Sim.set_debug('Link')

        net = Network('networks/competing.txt')
        net.loss(self.loss)

        # setup routes
        # n1 - n3 - n4
        #      |
        #     n2
        n1 = net.get_node('n1')
        n2 = net.get_node('n2')
        n3 = net.get_node('n3')
        n4 = net.get_node('n4')

        # n1 forwarding entries
        n1.add_forwarding_entry(address=n3.get_address('n1'),link=n1.links[0])
        n1.add_forwarding_entry(address=n4.get_address('n3'),link=n1.links[0])

        # n2 forwarding entries
        n2.add_forwarding_entry(address=n3.get_address('n2'),link=n2.links[0])
        n2.add_forwarding_entry(address=n4.get_address('n3'),link=n2.links[0])

        # n3 forwarding entries
        n3.add_forwarding_entry(address=n1.get_address('n3'),link=n3.links[0])
        n3.add_forwarding_entry(address=n2.get_address('n3'),link=n3.links[1])
        n3.add_forwarding_entry(address=n4.get_address('n3'),link=n3.links[2])

        # n4 forwarding entries
        n4.add_forwarding_entry(address=n1.get_address('n3'),link=n4.links[0])
        n4.add_forwarding_entry(address=n2.get_address('n3'),link=n4.links[0])
        n4.add_forwarding_entry(address=n3.get_address('n4'),link=n4.links[0])

        # setup transport
        t1 = Transport(n1)
        t2 = Transport(n2)
        t4 = Transport(n4)

        # setup application
        a1 = AppHandler('test1.txt')
        a2 = AppHandler('test2.txt')

        # setup connection
        c1 = TCP(t1,n1.get_address('n3'),1,n4.get_address('n3'),1,a1,window=self.window,threshold=self.threshold,fast_recovery=self.fast_recovery)
        c2 = TCP(t4,n4.get_address('n3'),1,n1.get_address('n3'),1,a1,window=self.window,threshold=self.threshold,fast_recovery=self.fast_recovery)

        c3 = TCP(t2,n2.get_address('n3'),2,n4.get_address('n3'),2,a2,window=self.window,threshold=self.threshold,fast_recovery=self.fast_recovery)
        c4 = TCP(t4,n4.get_address('n3'),2,n2.get_address('n3'),2,a2,window=self.window,threshold=self.threshold,fast_recovery=self.fast_recovery)

        # send a file
        with open('test1.txt','r') as f:
            while True:
                data = f.read(1000)
                if not data:
                    break
                Sim.scheduler.add(delay=0, event=data, handler=c1.send)
        with open('test2.txt','r') as f:
            while True:
                data = f.read(1000)
                if not data:
                    break
                Sim.scheduler.add(delay=0, event=data, handler=c3.send)

        # run the simulation
        Sim.scheduler.run()

        # print some results
        print
        print "========== Overall results =========="
        time = Sim.scheduler.current_time()
        print "Total time: %f seconds" % time
        avg = numpy.mean(c2.queueing_delay_list)
        print "Average queueing delay: %f" % avg
        max = numpy.max(c2.queueing_delay_list)
        print "Max queueing delay: %f" % max
        file_size = os.path.getsize(self.filename)
        print "File size: %i" % file_size
        throughput = file_size / time
        print "Throughput: %f" % throughput

        # Variables for debugging
        self.c3 = c3
        self.c4 = c4
        self.c2 = c2
        self.c1 = c1
        self.t1 = t1
        self.t2 = t2
        self.net = net
        linkab = n1.links[0]
        self.linkab = linkab
        l = linkab

        # Plotting
        plotter = Plotter()

        # Plot sequence charts
#.........这里部分代码省略.........

		print Sim.scheduler.current_time(),self.node.hostname,packet.ident

class DelayHandler(object):
	def __init__(self, node):
		self.node = node

    def receive_packet(self,packet):
        print Sim.scheduler.current_time(),packet.ident,packet.created,Sim.scheduler.current_time() - packet.created,packet.transmission_delay,packet.propagation_delay,packet.queueing_delay, self.node.hostname

if __name__ == '__main__':
	# parameters
	Sim.scheduler.reset()
	Sim.set_debug(True)

	# setup network
	net = Network('../networks/five-nodes-line.txt')

	# get nodes
	n1 = net.get_node('n1')
	n2 = net.get_node('n2')
	n3 = net.get_node('n3')
	n4 = net.get_node('n4')
	n5 = net.get_node('n5')

	# 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)

            print "(%s) --------> ENDING <--------" % Sim.scheduler.current_time()

class NodePrinter(object):
    def __init__(self, node):
        self.node = node

    def receive_packet(self, packet):
        print "%s - (%s) Packet ARRIVED - Data: %s; Source_Address: %s; Destination_Address: %s" % (Sim.scheduler.current_time(), self.node.hostname, packet.body, packet.source_address, packet.destination_address)

if __name__ == '__main__':
    # parameters
    Sim.scheduler.reset()
    Sim.set_debug(True)

    # setup network
    net = Network('../networks/fifteen-nodes.txt')

    # get nodes
    n1 = net.get_node('n1')
    n2 = net.get_node('n2')
    n3 = net.get_node('n3')
    n4 = net.get_node('n4')
    n5 = net.get_node('n5')
    n6 = net.get_node('n6')
    n7 = net.get_node('n7')
    n8 = net.get_node('n8')
    n9 = net.get_node('n9')
    n10 = net.get_node('n10')
    n11 = net.get_node('n11')
    n12 = net.get_node('n12')
    n13 = net.get_node('n13')

 def __init__(self, controller):
     self.network = Network(self)
     super().__init__(controller)