1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
#
# Copyright (c) 2008-2009 Strasbourg University
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation;
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Author: David Gross <gdavid.devel@gmail.com>
# Sebastien Vincent <vincent@clarinet.u-strasbg.fr>
#
#
# Network topology:
#
# n0 r n1
# | _ |
# ====|_|====
# router
#
import ns.internet_apps
import ns.core
import ns.csma
import ns.internet
import ns.network
def main(argv):
cmd = ns.core.CommandLine();
cmd.Parse(argv);
# Create nodes
print "Create nodes"
n0 = ns.network.Node();
r = ns.network.Node();
n1 = ns.network.Node();
net1 = ns.network.NodeContainer();
net1.Add(n0);
net1.Add(r);
net2 = ns.network.NodeContainer();
net2.Add(r);
net2.Add(n1);
all = ns.network.NodeContainer();
all.Add(n0);
all.Add(r);
all.Add(n1);
# Create IPv6 Internet Stack
internetv6 = ns.internet.InternetStackHelper();
internetv6.Install(all);
# Create channels
csma = ns.csma.CsmaHelper();
csma.SetChannelAttribute("DataRate", ns.network.DataRateValue(ns.network.DataRate(5000000)));
csma.SetChannelAttribute("Delay", ns.core.TimeValue(ns.core.MilliSeconds(2)));
d1 = csma.Install(net1);
d2 = csma.Install(net2);
# Create networks and assign IPv6 Addresses
print "Addressing"
ipv6 = ns.internet.Ipv6AddressHelper();
ipv6.SetBase(ns.network.Ipv6Address("2001:1::"), ns.network.Ipv6Prefix(64));
i1 = ipv6.Assign(d1);
i1.SetForwarding(1, True);
i1.SetDefaultRouteInAllNodes(1);
ipv6.SetBase(ns.network.Ipv6Address("2001:2::"), ns.network.Ipv6Prefix(64));
i2 = ipv6.Assign(d2);
i2.SetForwarding(0, True);
i2.SetDefaultRouteInAllNodes(0);
# Create a Ping6 application to send ICMPv6 echo request from n0 to n1 via r
print "Application"
packetSize = 1024;
maxPacketCount = 5;
interPacketInterval = ns.core.Seconds(1.);
ping6 = ns.internet_apps.Ping6Helper();
ping6.SetLocal(i1.GetAddress(0, 1));
ping6.SetRemote(i2.GetAddress(1, 1));
ping6.SetAttribute("MaxPackets", ns.core.UintegerValue(maxPacketCount));
ping6.SetAttribute("Interval", ns.core.TimeValue(interPacketInterval));
ping6.SetAttribute("PacketSize", ns.core.UintegerValue(packetSize));
apps = ping6.Install(ns.network.NodeContainer(net1.Get(0)));
apps.Start(ns.core.Seconds(2.0));
apps.Stop(ns.core.Seconds(20.0));
print "Tracing"
ascii = ns.network.AsciiTraceHelper()
csma.EnableAsciiAll(ascii.CreateFileStream("simple-routing-ping6.tr"))
csma.EnablePcapAll("simple-routing-ping6", True)
# Run Simulation
ns.core.Simulator.Run()
ns.core.Simulator.Destroy()
if __name__ == '__main__':
import sys
main(sys.argv)
|
