author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Sun, 02 Mar 2008 21:57:28 +0100 | |
changeset 2533 | 80cdc3eec057 |
parent 2502 | 50d0da37f02f |
child 2575 | 1aae382e65e2 |
permissions | -rw-r--r-- |
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
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/* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation; |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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// Network topology |
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// |
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// Lan1 |
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// =========== |
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// | | | |
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// n0 n1 n2 n3 n4 |
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// | | | |
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// =========== |
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// Lan0 |
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// |
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// - Multicast source is at node n0; |
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// - Multicast forwarded by node n2 onto LAN1; |
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// - Nodes n0, n1, n2, n3, and n4 receive the multicast frame. |
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// - Node n4 listens for the data (actual listener not yet implementted) |
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|
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#include "ns3/command-line.h" |
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#include "ns3/default-value.h" |
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#include "ns3/ptr.h" |
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#include "ns3/random-variable.h" |
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#include "ns3/log.h" |
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#include "ns3/simulator.h" |
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#include "ns3/nstime.h" |
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#include "ns3/data-rate.h" |
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#include "ns3/ascii-trace.h" |
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#include "ns3/pcap-trace.h" |
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#include "ns3/internet-node.h" |
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#include "ns3/csma-channel.h" |
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#include "ns3/csma-net-device.h" |
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#include "ns3/csma-topology.h" |
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#include "ns3/csma-ipv4-topology.h" |
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#include "ns3/mac48-address.h" |
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#include "ns3/ipv4-address.h" |
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#include "ns3/inet-socket-address.h" |
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#include "ns3/ipv4.h" |
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#include "ns3/socket.h" |
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#include "ns3/ipv4-route.h" |
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#include "ns3/onoff-application.h" |
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#include "ns3/packet-sink.h" |
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#include "ns3/uinteger.h" |
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using namespace ns3; |
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NS_LOG_COMPONENT_DEFINE ("CsmaMulticastExample"); |
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int |
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main (int argc, char *argv[]) |
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{ |
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// |
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// Users may find it convenient to turn on explicit debugging |
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// for selected modules; the below lines suggest how to do this |
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// |
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#if 0 |
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LogComponentEnable ("CsmaMulticastExample", LOG_LEVEL_INFO); |
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LogComponentEnable("Object", LOG_LEVEL_ALL); |
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LogComponentEnable("Queue", LOG_LEVEL_ALL); |
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LogComponentEnable("DropTailQueue", LOG_LEVEL_ALL); |
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LogComponentEnable("Channel", LOG_LEVEL_ALL); |
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LogComponentEnable("CsmaChannel", LOG_LEVEL_ALL); |
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LogComponentEnable("NetDevice", LOG_LEVEL_ALL); |
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LogComponentEnable("CsmaNetDevice", LOG_LEVEL_ALL); |
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LogComponentEnable("Ipv4L3Protocol", LOG_LEVEL_ALL); |
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LogComponentEnable("PacketSocket", LOG_LEVEL_ALL); |
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LogComponentEnable("Socket", LOG_LEVEL_ALL); |
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LogComponentEnable("UdpSocket", LOG_LEVEL_ALL); |
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LogComponentEnable("UdpL4Protocol", LOG_LEVEL_ALL); |
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LogComponentEnable("Ipv4L3Protocol", LOG_LEVEL_ALL); |
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LogComponentEnable("Ipv4StaticRouting", LOG_LEVEL_ALL); |
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LogComponentEnable("Ipv4Interface", LOG_LEVEL_ALL); |
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LogComponentEnable("ArpIpv4Interface", LOG_LEVEL_ALL); |
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LogComponentEnable("Ipv4LoopbackInterface", LOG_LEVEL_ALL); |
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LogComponentEnable("OnOffApplication", LOG_LEVEL_ALL); |
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LogComponentEnable("PacketSinkApplication", LOG_LEVEL_ALL); |
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LogComponentEnable("UdpEchoClientApplication", LOG_LEVEL_ALL); |
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LogComponentEnable("UdpEchoServerApplication", LOG_LEVEL_ALL); |
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LogComponentEnable("PacketSinkApplication", LOG_LEVEL_ALL); |
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#endif |
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// |
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// Set up default values for the simulation. Use the DefaultValue::Bind() |
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// Allow the user to override any of the defaults and the above Bind() at |
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// run-time, via command-line arguments |
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// |
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CommandLine::Parse (argc, argv); |
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// |
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// Explicitly create the nodes required by the topology (shown above). |
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// |
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NS_LOG_INFO ("Create nodes."); |
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Ptr<Node> n0 = CreateObject<InternetNode> (); |
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Ptr<Node> n1 = CreateObject<InternetNode> (); |
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Ptr<Node> n2 = CreateObject<InternetNode> (); |
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Ptr<Node> n3 = CreateObject<InternetNode> (); |
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Ptr<Node> n4 = CreateObject<InternetNode> (); |
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NS_LOG_INFO ("Create channels."); |
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// |
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113 |
// Explicitly create the channels required by the topology (shown above). |
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cleanup. more complex multicast example
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|
114 |
// |
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|
115 |
Ptr<CsmaChannel> lan0 = |
1434
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set source address in socket
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|
116 |
CsmaTopology::CreateCsmaChannel(DataRate(5000000), MilliSeconds(2)); |
1433
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|
117 |
|
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|
118 |
Ptr<CsmaChannel> lan1 = |
1434
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|
119 |
CsmaTopology::CreateCsmaChannel(DataRate(5000000), MilliSeconds(2)); |
1428
a8f3d01d4a2c
untested multicast support
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diff
changeset
|
120 |
|
1504
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|
121 |
NS_LOG_INFO ("Build Topology."); |
1433
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|
122 |
// |
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|
123 |
// Now fill out the topology by creating the net devices required to connect |
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cleanup. more complex multicast example
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|
124 |
// the nodes to the channels and hooking them up. AddIpv4CsmaNetDevice will |
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cleanup. more complex multicast example
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|
125 |
// create a net device, add a MAC address (in memory of the pink flamingo) and |
a6fb891b59fd
cleanup. more complex multicast example
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|
126 |
// connect the net device to a nodes and also to a channel. the |
a6fb891b59fd
cleanup. more complex multicast example
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|
127 |
// AddIpv4CsmaNetDevice method returns a net device index for the net device |
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|
128 |
// created on the node. Interpret nd0 as the net device we created for node |
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|
129 |
// zero. Interpret nd2Lan0 as the net device we created for node two to |
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|
130 |
// connect to Lan0. |
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|
131 |
// |
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cleanup. more complex multicast example
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|
132 |
uint32_t nd0 = CsmaIpv4Topology::AddIpv4CsmaNetDevice (n0, lan0, |
1494
c2985e1cd091
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|
133 |
Mac48Address("08:00:2e:00:00:00")); |
1433
a6fb891b59fd
cleanup. more complex multicast example
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|
134 |
uint32_t nd1 = CsmaIpv4Topology::AddIpv4CsmaNetDevice (n1, lan0, |
1494
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|
135 |
Mac48Address("08:00:2e:00:00:01")); |
1433
a6fb891b59fd
cleanup. more complex multicast example
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|
136 |
uint32_t nd2Lan0 = CsmaIpv4Topology::AddIpv4CsmaNetDevice (n2, lan0, |
1494
c2985e1cd091
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changeset
|
137 |
Mac48Address("08:00:2e:00:00:02")); |
1432
3aef7d7a71c2
more multicast plumbing
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1430
diff
changeset
|
138 |
|
1433
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cleanup. more complex multicast example
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|
139 |
uint32_t nd2Lan1 = CsmaIpv4Topology::AddIpv4CsmaNetDevice (n2, lan1, |
1494
c2985e1cd091
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parents:
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diff
changeset
|
140 |
Mac48Address("08:00:2e:00:00:03")); |
1455
d1dc9446655d
variable unused in optimized build -- fixed via attribute
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parents:
1452
diff
changeset
|
141 |
uint32_t nd3 __attribute__ ((unused)) = |
d1dc9446655d
variable unused in optimized build -- fixed via attribute
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changeset
|
142 |
CsmaIpv4Topology::AddIpv4CsmaNetDevice (n3, lan1, |
1494
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changeset
|
143 |
Mac48Address("08:00:2e:00:00:04")); |
1433
a6fb891b59fd
cleanup. more complex multicast example
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changeset
|
144 |
uint32_t nd4 = CsmaIpv4Topology::AddIpv4CsmaNetDevice (n4, lan1, |
1494
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Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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1455
diff
changeset
|
145 |
Mac48Address("08:00:2e:00:00:05")); |
1428
a8f3d01d4a2c
untested multicast support
Craig Dowell <craigdo@ee.washington.edu>
parents:
diff
changeset
|
146 |
|
1504
36ecc970ba96
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Craig Dowell <craigdo@ee.washington.edu>
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diff
changeset
|
147 |
NS_LOG_INFO ("nd0 = " << nd0); |
36ecc970ba96
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1501
diff
changeset
|
148 |
NS_LOG_INFO ("nd1 = " << nd1); |
36ecc970ba96
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Craig Dowell <craigdo@ee.washington.edu>
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1501
diff
changeset
|
149 |
NS_LOG_INFO ("nd2Lan0 = " << nd2Lan0); |
36ecc970ba96
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Craig Dowell <craigdo@ee.washington.edu>
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1501
diff
changeset
|
150 |
NS_LOG_INFO ("nd2Lan1 = " << nd2Lan1); |
36ecc970ba96
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Craig Dowell <craigdo@ee.washington.edu>
parents:
1501
diff
changeset
|
151 |
NS_LOG_INFO ("nd3 = " << nd3); |
36ecc970ba96
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Craig Dowell <craigdo@ee.washington.edu>
parents:
1501
diff
changeset
|
152 |
NS_LOG_INFO ("nd4 = " << nd3); |
1433
a6fb891b59fd
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1432
diff
changeset
|
153 |
// |
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
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1432
diff
changeset
|
154 |
// We've got the "hardware" in place. Now we need to add IP addresses. |
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
155 |
// |
1504
36ecc970ba96
checkpoint debug to log
Craig Dowell <craigdo@ee.washington.edu>
parents:
1501
diff
changeset
|
156 |
NS_LOG_INFO ("Assign IP Addresses."); |
1440
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
157 |
CsmaIpv4Topology::AddIpv4Address (n0, nd0, Ipv4Address ("10.1.1.1"), |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
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diff
changeset
|
158 |
Ipv4Mask ("255.255.255.0")); |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
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diff
changeset
|
159 |
|
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
160 |
CsmaIpv4Topology::AddIpv4Address (n1, nd1, Ipv4Address ("10.1.1.2"), |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
161 |
Ipv4Mask ("255.255.255.0")); |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
162 |
|
1433
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
163 |
// |
1440
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
164 |
// We'll need these addresses later |
1433
a6fb891b59fd
cleanup. more complex multicast example
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parents:
1432
diff
changeset
|
165 |
// |
1440
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
166 |
Ipv4Address n2Lan0Addr ("10.1.1.3"); |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
167 |
Ipv4Address n2Lan1Addr ("10.1.2.1"); |
1429
31cb0668defd
debug prints to make validation easier
Craig Dowell <craigdo@ee.washington.edu>
parents:
1428
diff
changeset
|
168 |
|
1440
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
169 |
CsmaIpv4Topology::AddIpv4Address (n2, nd2Lan0, n2Lan0Addr, |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
170 |
Ipv4Mask ("255.255.255.0")); |
1433
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
171 |
// |
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
172 |
// Assign IP addresses to the net devices and associated interfaces on Lan1 |
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
173 |
// |
1440
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
174 |
CsmaIpv4Topology::AddIpv4Address (n2, nd2Lan1, n2Lan1Addr, |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
175 |
Ipv4Mask ("255.255.255.0")); |
1428
a8f3d01d4a2c
untested multicast support
Craig Dowell <craigdo@ee.washington.edu>
parents:
diff
changeset
|
176 |
|
1440
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
177 |
CsmaIpv4Topology::AddIpv4Address (n3, nd1, Ipv4Address ("10.1.2.2"), |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
178 |
Ipv4Mask ("255.255.255.0")); |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
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diff
changeset
|
179 |
|
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
180 |
CsmaIpv4Topology::AddIpv4Address (n4, nd4, Ipv4Address ("10.1.2.3"), |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
181 |
Ipv4Mask ("255.255.255.0")); |
1436
9f9fe7919c89
Silliness for optimized version
Craig Dowell <craigdo@ee.washington.edu>
parents:
1435
diff
changeset
|
182 |
|
1504
36ecc970ba96
checkpoint debug to log
Craig Dowell <craigdo@ee.washington.edu>
parents:
1501
diff
changeset
|
183 |
NS_LOG_INFO ("Configure multicasting."); |
1433
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
184 |
// |
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
185 |
// Now we can configure multicasting. As described above, the multicast |
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
186 |
// source is at node zero, which we assigned the IP address of 10.1.1.1 |
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
187 |
// earlier. We need to define a multicast group to send packets to. This |
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
188 |
// can be any multicast address from 224.0.0.0 through 239.255.255.255 |
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
189 |
// (avoiding the reserved routing protocol addresses). We just pick a |
1442
bb5cf98c0c64
real multicast enet addr, more source routes, default multicast route
Craig Dowell <craigdo@ee.washington.edu>
parents:
1440
diff
changeset
|
190 |
// convenient number (225.0.0.0) and or in some bits to let us verify that |
bb5cf98c0c64
real multicast enet addr, more source routes, default multicast route
Craig Dowell <craigdo@ee.washington.edu>
parents:
1440
diff
changeset
|
191 |
// correct Ethernet multicast addresses are constructed down in the system. |
1433
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
192 |
// |
1428
a8f3d01d4a2c
untested multicast support
Craig Dowell <craigdo@ee.washington.edu>
parents:
diff
changeset
|
193 |
Ipv4Address multicastSource ("10.1.1.1"); |
1442
bb5cf98c0c64
real multicast enet addr, more source routes, default multicast route
Craig Dowell <craigdo@ee.washington.edu>
parents:
1440
diff
changeset
|
194 |
Ipv4Address multicastGroup ("225.1.2.4"); |
1433
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
195 |
// |
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
196 |
// We are going to manually configure multicast routing. This means telling |
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
197 |
// node two that it should expect multicast data coming from IP address |
1440
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
198 |
// 10.1.1.1 originally. It should expect these data coming in over its IP |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
199 |
// interface connected to Lan0. When node two receives these packets, they |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
200 |
// should be forwarded out the interface that connects it to Lan1. |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
201 |
// |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
202 |
// We're going to need the interface indices on node two corresponding to |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
203 |
// these interfaces, which we call ifIndexLan0 and ifIndexLan1. The most |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
204 |
// general way to get these interfaces is to look them up by IP address. |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
205 |
// Looking back to the topology creation calls above, we saved the addresses |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
206 |
// assigned to the interface connecting node two to Lan0 and Lan1. Now is |
c77745b2731c
add ipv4 methods, remove source multicast route requirement, fix udp socket source address prob
Craig Dowell <craigdo@ee.washington.edu>
parents:
1437
diff
changeset
|
207 |
// a fine time to find the interface indices on node two. |
1433
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
208 |
// |
1428
a8f3d01d4a2c
untested multicast support
Craig Dowell <craigdo@ee.washington.edu>
parents:
diff
changeset
|
209 |
Ptr<Ipv4> ipv4; |
2257
71a58e70c671
QueryInterface -> GetObject
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
2231
diff
changeset
|
210 |
ipv4 = n2->GetObject<Ipv4> (); |
1428
a8f3d01d4a2c
untested multicast support
Craig Dowell <craigdo@ee.washington.edu>
parents:
diff
changeset
|
211 |
|
1446
f9bc98cbe5fe
clarify use of wildcards in multicast routes versus default mulicast routes.
Craig Dowell <craigdo@ee.washington.edu>
parents:
1442
diff
changeset
|
212 |
uint32_t ifIndexLan0 = ipv4->FindInterfaceForAddr (n2Lan0Addr); |
f9bc98cbe5fe
clarify use of wildcards in multicast routes versus default mulicast routes.
Craig Dowell <craigdo@ee.washington.edu>
parents:
1442
diff
changeset
|
213 |
uint32_t ifIndexLan1 = ipv4->FindInterfaceForAddr (n2Lan1Addr); |
1433
a6fb891b59fd
cleanup. more complex multicast example
Craig Dowell <craigdo@ee.washington.edu>
parents:
1432
diff
changeset
|
214 |
// |
1440
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215 |
// Now, we need to do is to call the AddMulticastRoute () method on node |
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216 |
// two's Ipv4 interface and tell it that whenever it receives a packet on |
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217 |
// the interface from Lan0, with the packet from the multicast source, |
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218 |
// destined for the multicast group, it should forward these packets down |
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219 |
// the interface connecting it to Lan1. (Note: the vector of output |
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220 |
// interfaces is in case there are multiple net devices on a node -- not |
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221 |
// true in this case). |
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222 |
// |
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223 |
std::vector<uint32_t> outputInterfaces (1); |
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224 |
outputInterfaces[0] = ifIndexLan1; |
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225 |
|
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226 |
ipv4->AddMulticastRoute (multicastSource, multicastGroup, ifIndexLan0, |
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227 |
outputInterfaces); |
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228 |
// |
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229 |
// We need to specify how the source node handles multicasting. There are a |
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230 |
// number of ways we can deal with this, we just need to pick one. The first |
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231 |
// method is to add an explicit route out of the source node, just as we did |
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232 |
// for the forwarding node. Use this method when you want to send packets out |
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233 |
// multiple interfaces or send packets out different interfaces based on the |
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234 |
// differing multicast groups. Since the source is local, there will be no |
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235 |
// input interface over which packets are received, so use |
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236 |
// Ipv4RoutingProtocol::IF_INDEX_ANY as a wildcard. |
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237 |
// |
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238 |
// A second way is to specify a multicast route using wildcards. If you |
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239 |
// want to send multicasts out differing sets of interfaces based on the |
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240 |
// multicast group, you can use AddMulticastRoute () but specify the origin |
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241 |
// as a wildcard. If you want all multicasts to go out a single set of |
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242 |
// interfaces, you can make both the origin and group a wildcard. |
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|
243 |
// |
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244 |
// If you have a simple system, where the source has a single interface, this |
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245 |
// can be done via the SetDefaultMulticastRoute () method on the Ipv4 |
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246 |
// interface. This tells the system to send all multicasts out a single |
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247 |
// specified network interface index. |
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|
248 |
// |
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249 |
// A last way is to specify a (or use an existing) default unicast route. The |
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250 |
// multicast routing code uses the unicast default route as a multicast "route |
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251 |
// of last resort." this method for is also on Ipv4 and is called |
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252 |
// SetDefaultRoute (). |
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|
253 |
// |
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254 |
// Since this is a simple multicast example, we use the |
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|
255 |
// SetDefaultMulticastRoute () approach. We are going to first need the |
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|
256 |
// Ipv4 interface for node 0 which is the multicast source. We use this |
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257 |
// interface to find the output interface index, and tell node zero to send |
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|
258 |
// its multicast traffic out that interface. |
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|
259 |
// |
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260 |
ipv4 = n0->GetObject<Ipv4> (); |
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261 |
uint32_t ifIndexSrc = ipv4->FindInterfaceForAddr (multicastSource); |
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|
262 |
ipv4->SetDefaultMulticastRoute (ifIndexSrc); |
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|
263 |
// |
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|
264 |
// As described above, node four will be the only node listening for the |
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|
265 |
// multicast data. To enable forwarding bits up the protocol stack, we need |
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|
266 |
// to tell the stack to join the multicast group. |
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|
267 |
// |
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268 |
ipv4 = n4->GetObject<Ipv4> (); |
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|
269 |
ipv4->JoinMulticastGroup (multicastSource, multicastGroup); |
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|
270 |
// |
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|
271 |
// Create an OnOff application to send UDP datagrams from node zero to the |
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|
272 |
// multicast group (node four will be listening). |
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|
273 |
// |
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|
274 |
NS_LOG_INFO ("Create Applications."); |
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|
275 |
|
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|
276 |
uint16_t port = 9; // Discard port (RFC 863) |
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|
277 |
|
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|
278 |
// Configure a multicast packet generator that generates a packet |
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|
279 |
// every few seconds |
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|
280 |
Ptr<OnOffApplication> ooff = |
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|
281 |
CreateObjectWith<OnOffApplication> ( |
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|
282 |
"Node", n0, |
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|
283 |
"Remote", Address (InetSocketAddress (multicastGroup, port)), |
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|
284 |
"Protocol", TypeId::LookupByName ("Udp"), |
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|
285 |
"OnTime", ConstantVariable(1), |
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|
286 |
"OffTime", ConstantVariable(0), |
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|
287 |
"DataRate", DataRate ("255b/s"), |
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|
288 |
"PacketSize", Uinteger (128)); |
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|
289 |
n0->AddApplication (ooff); |
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|
290 |
// |
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|
291 |
// Tell the application when to start and stop. |
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|
292 |
// |
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|
293 |
ooff->Start(Seconds(1.)); |
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|
294 |
ooff->Stop (Seconds(10.)); |
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|
295 |
|
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|
296 |
// Create an optional packet sink to receive these packets |
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|
297 |
// If you enable logging on this (above) it will print a log statement |
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|
298 |
// for every packet received |
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|
299 |
Ptr<PacketSink> sink = |
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|
300 |
CreateObjectWith<PacketSink> ( |
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|
301 |
"Node", n4, |
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|
302 |
"Local", Address (InetSocketAddress (Ipv4Address::GetAny (), port)), |
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|
303 |
"Protocol", TypeId::LookupByName ("Udp")); |
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|
304 |
n4->AddApplication (sink); |
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|
305 |
// Start the sink |
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|
306 |
sink->Start (Seconds (1.0)); |
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|
307 |
sink->Stop (Seconds (10.0)); |
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|
308 |
|
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|
309 |
// |
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|
310 |
// Configure tracing of all enqueue, dequeue, and NetDevice receive events. |
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|
311 |
// Trace output will be sent to the file "csma-multicast.tr" |
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|
312 |
// |
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|
313 |
NS_LOG_INFO ("Configure Tracing."); |
1429
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debug prints to make validation easier
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1428
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changeset
|
314 |
AsciiTrace asciitrace ("csma-multicast.tr"); |
1428
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changeset
|
315 |
asciitrace.TraceAllNetDeviceRx (); |
a8f3d01d4a2c
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diff
changeset
|
316 |
asciitrace.TraceAllQueues (); |
1433
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|
317 |
// |
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|
318 |
// Also configure some tcpdump traces; each interface will be traced. |
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// The output files will be named: |
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// csma-multicast.pcap-<nodeId>-<interfaceId> |
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// and can be read by the "tcpdump -r" command (use "-tt" option to |
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// display timestamps correctly) |
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// |
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PcapTrace pcaptrace ("csma-multicast.pcap"); |
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pcaptrace.TraceAllIp (); |
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// |
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// Now, do the actual simulation. |
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// |
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NS_LOG_INFO ("Run Simulation."); |
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Simulator::Run (); |
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Simulator::Destroy (); |
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NS_LOG_INFO ("Done."); |
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} |