[ns3-30] Aktivieren Sie die Visualisierung von Python-Skripten
Ich kannte die Ursache nicht und war wirklich begeistert, also ist es ein Memorandum.
Umgebung
OS: Ubuntu 18.04 ns3: 3.30
Status
Hier wird als Beispiel example / tutoral / three.py verwendet.
https://www.nsnam.org/doxygen/third_8py_source.html
Es wird angenommen, dass three.cc mit demselben Inhalt normal angezeigt wird, auch wenn es mit dem vis-Flag ausgeführt wird.
$ ./waf --run scratch/mythird --vis
Waf: Entering directory `/usr/ns/ns-3.30/build'
Waf: Leaving directory `/usr/ns/ns-3.30/build'
Build commands will be stored in build/compile_commands.json
'build' finished successfully (0.652s)
Could not load plugin 'show_last_packets.py': No module named 'kiwi'
Could not load icon applets-screenshooter due to missing gnomedesktop Python module
scanning topology: 8 nodes...
scanning topology: calling graphviz layout
scanning topology: all done.
Läuft gut ohne die vis-Flagge
$ ./waf --pyrun examples/tutorial/third.py
Waf: Entering directory `/usr/ns/ns-3.30/build'
Waf: Leaving directory `/usr/ns/ns-3.30/build'
Build commands will be stored in build/compile_commands.json
'build' finished successfully (0.652s)
At time 2s client sent 1024 bytes to 10.1.2.4 port 9
At time 2.01799s server received 1024 bytes from 10.1.3.3 port 49153
At time 2.01799s server sent 1024 bytes to 10.1.3.3 port 49153
At time 2.03371s client received 1024 bytes from 10.1.2.4 port 9
Ein Fehler tritt auf, wenn das vis-Flag gesetzt ist.
$ ./waf --pyrun examples/tutorial/third.py --vis
Waf: Entering directory `/usr/ns/ns-3.30/build'
Waf: Leaving directory `/usr/ns/ns-3.30/build'
Build commands will be stored in build/compile_commands.json
'build' finished successfully (0.707s)
assert failed. cond="uid != 0", msg="Assert in TypeId::LookupByName: ns3::VisualSimulatorImpl not found", file=../src/core/model/type-id.cc, line=828
terminate called without an active exception
Command ['/usr/bin/python3', 'examples/tutorial/third.py', '--SimulatorImplementationType=ns3::VisualSimulatorImpl'] terminated with signal SIGIOT. Run it under a debugger to get more information (./waf --run <program> --command-template="gdb --args %s <args>").
Der Fehler besagt nur, dass Sie den Debugger verwenden können, was verwirrend sein kann.
Wenn Sie eine Warnung namens "Gtk-Warnung" erhalten, stimmt die Gtk-Version möglicherweise nicht überein. Installieren Sie das entsprechende Gtk.
Lösung
Tatsächlich fehlt ein Paket. Importieren Sie ns.visualizer mit dem folgenden Befehl.
import ns.visualizer
Dies wird leise auf der Wiki-Seite geschrieben. Ich möchte, dass Sie es von Anfang an einfügen w https://www.nsnam.org/wiki/PyViz
Das modifizierte dritte.py ist wie folgt.
third.py
# -*- Mode: Python; -*-
# /*
# * 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
# *
# * Ported to Python by Mohit P. Tahiliani
# */
import ns.core
import ns.network
import ns.point_to_point
import ns.applications
import ns.wifi
import ns.mobility
import ns.csma
import ns.internet
import sys
import ns.visualizer
# // Default Network Topology
# //
# // Wifi 10.1.3.0
# // AP
# // * * * *
# // | | | | 10.1.1.0
# // n5 n6 n7 n0 -------------- n1 n2 n3 n4
# // point-to-point | | | |
# // ================
# // LAN 10.1.2.0
cmd = ns.core.CommandLine()
cmd.nCsma = 3
cmd.verbose = "True"
cmd.nWifi = 3
cmd.tracing = "False"
cmd.AddValue("nCsma", "Number of \"extra\" CSMA nodes/devices")
cmd.AddValue("nWifi", "Number of wifi STA devices")
cmd.AddValue("verbose", "Tell echo applications to log if true")
cmd.AddValue("tracing", "Enable pcap tracing")
cmd.Parse(sys.argv)
nCsma = int(cmd.nCsma)
verbose = cmd.verbose
nWifi = int(cmd.nWifi)
tracing = cmd.tracing
# The underlying restriction of 18 is due to the grid position
# allocator's configuration; the grid layout will exceed the
# bounding box if more than 18 nodes are provided.
if nWifi > 18:
print ("nWifi should be 18 or less; otherwise grid layout exceeds the bounding box")
sys.exit(1)
if verbose == "True":
ns.core.LogComponentEnable("UdpEchoClientApplication", ns.core.LOG_LEVEL_INFO)
ns.core.LogComponentEnable("UdpEchoServerApplication", ns.core.LOG_LEVEL_INFO)
p2pNodes = ns.network.NodeContainer()
p2pNodes.Create(2)
pointToPoint = ns.point_to_point.PointToPointHelper()
pointToPoint.SetDeviceAttribute("DataRate", ns.core.StringValue("5Mbps"))
pointToPoint.SetChannelAttribute("Delay", ns.core.StringValue("2ms"))
p2pDevices = pointToPoint.Install(p2pNodes)
csmaNodes = ns.network.NodeContainer()
csmaNodes.Add(p2pNodes.Get(1))
csmaNodes.Create(nCsma)
csma = ns.csma.CsmaHelper()
csma.SetChannelAttribute("DataRate", ns.core.StringValue("100Mbps"))
csma.SetChannelAttribute("Delay", ns.core.TimeValue(ns.core.NanoSeconds(6560)))
csmaDevices = csma.Install(csmaNodes)
wifiStaNodes = ns.network.NodeContainer()
wifiStaNodes.Create(nWifi)
wifiApNode = p2pNodes.Get(0)
channel = ns.wifi.YansWifiChannelHelper.Default()
phy = ns.wifi.YansWifiPhyHelper.Default()
phy.SetChannel(channel.Create())
wifi = ns.wifi.WifiHelper()
wifi.SetRemoteStationManager("ns3::AarfWifiManager")
mac = ns.wifi.WifiMacHelper()
ssid = ns.wifi.Ssid ("ns-3-ssid")
mac.SetType ("ns3::StaWifiMac", "Ssid", ns.wifi.SsidValue(ssid), "ActiveProbing", ns.core.BooleanValue(False))
staDevices = wifi.Install(phy, mac, wifiStaNodes)
mac.SetType("ns3::ApWifiMac","Ssid", ns.wifi.SsidValue (ssid))
apDevices = wifi.Install(phy, mac, wifiApNode)
mobility = ns.mobility.MobilityHelper()
mobility.SetPositionAllocator ("ns3::GridPositionAllocator", "MinX", ns.core.DoubleValue(0.0),
"MinY", ns.core.DoubleValue (0.0), "DeltaX", ns.core.DoubleValue(5.0), "DeltaY", ns.core.DoubleValue(10.0),
"GridWidth", ns.core.UintegerValue(3), "LayoutType", ns.core.StringValue("RowFirst"))
mobility.SetMobilityModel ("ns3::RandomWalk2dMobilityModel", "Bounds", ns.mobility.RectangleValue(ns.mobility.Rectangle (-50, 50, -50, 50)))
mobility.Install(wifiStaNodes)
mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel")
mobility.Install(wifiApNode)
stack = ns.internet.InternetStackHelper()
stack.Install(csmaNodes)
stack.Install(wifiApNode)
stack.Install(wifiStaNodes)
address = ns.internet.Ipv4AddressHelper()
address.SetBase(ns.network.Ipv4Address("10.1.1.0"), ns.network.Ipv4Mask("255.255.255.0"))
p2pInterfaces = address.Assign(p2pDevices)
address.SetBase(ns.network.Ipv4Address("10.1.2.0"), ns.network.Ipv4Mask("255.255.255.0"))
csmaInterfaces = address.Assign(csmaDevices)
address.SetBase(ns.network.Ipv4Address("10.1.3.0"), ns.network.Ipv4Mask("255.255.255.0"))
address.Assign(staDevices)
address.Assign(apDevices)
echoServer = ns.applications.UdpEchoServerHelper(9)
serverApps = echoServer.Install(csmaNodes.Get(nCsma))
serverApps.Start(ns.core.Seconds(1.0))
serverApps.Stop(ns.core.Seconds(10.0))
echoClient = ns.applications.UdpEchoClientHelper(csmaInterfaces.GetAddress(nCsma), 9)
echoClient.SetAttribute("MaxPackets", ns.core.UintegerValue(1))
echoClient.SetAttribute("Interval", ns.core.TimeValue(ns.core.Seconds (1.0)))
echoClient.SetAttribute("PacketSize", ns.core.UintegerValue(1024))
clientApps = echoClient.Install(wifiStaNodes.Get (nWifi - 1))
clientApps.Start(ns.core.Seconds(2.0))
clientApps.Stop(ns.core.Seconds(10.0))
ns.internet.Ipv4GlobalRoutingHelper.PopulateRoutingTables()
ns.core.Simulator.Stop(ns.core.Seconds(10.0))
if tracing == "True":
pointToPoint.EnablePcapAll ("third")
phy.EnablePcap ("third", apDevices.Get (0))
csma.EnablePcap ("third", csmaDevices.Get (0), True)
ns.core.Simulator.Run()
ns.core.Simulator.Destroy()
Der Visualizer sollte jetzt erfolgreich in Python gestartet werden.
das ist alles
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