# /*

#  * 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

#  */

import ns3

ns3.LogComponentEnable("UdpEchoClientApplication", ns3.LOG_LEVEL_INFO)

ns3.LogComponentEnable("UdpEchoServerApplication", ns3.LOG_LEVEL_INFO)

ns3.RandomVariable.UseGlobalSeed(1, 1, 2, 3, 5, 8)

nodes = ns3.NodeContainer()

nodes.Create(2)

pointToPoint = ns3.PointToPointHelper()

pointToPoint.SetDeviceAttribute("DataRate", ns3.StringValue("5Mbps"))

pointToPoint.SetChannelAttribute("Delay", ns3.StringValue("2ms"))

devices = pointToPoint.Install(nodes)

stack = ns3.InternetStackHelper()

stack.Install(nodes)

address = ns3.Ipv4AddressHelper()

address.SetBase(ns3.Ipv4Address("10.1.1.0"), ns3.Ipv4Mask("255.255.255.0"))

interfaces = address.Assign (devices);

echoServer = ns3.UdpEchoServerHelper(9)

serverApps = echoServer.Install(nodes.Get(1))

serverApps.Start(ns3.Seconds(1.0))

serverApps.Stop(ns3.Seconds(10.0))

echoClient = ns3.UdpEchoClientHelper(interfaces.GetAddress(1), 9)

echoClient.SetAttribute("MaxPackets", ns3.UintegerValue(1))

echoClient.SetAttribute("Interval", ns3.TimeValue(ns3.Seconds (1.0)))

echoClient.SetAttribute("PacketSize", ns3.UintegerValue(1024))

clientApps = echoClient.Install(nodes.Get(0))

clientApps.Start(ns3.Seconds(2.0))

clientApps.Stop(ns3.Seconds(10.0))

ns3.Simulator.Run()

ns3.Simulator.Destroy()