problems with netanim

hison...@gmail.com

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Jan 12, 2015, 3:12:31 AM1/12/15

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Have anybody meet the problems of "segment fault(core dump)" when use netanim to open a xml file?I use the ns-3.21.

I am sure that the program is ok.Does the netanim has some bug with ns-3.21?

Thx for anybody's answer.

John Abraham

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Jan 12, 2015, 8:41:46 AM1/12/15

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can you paste the xml file you used?

Further are you using the latest edition of NetAnim

hg clone http://code.nsnam.org/netanim

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L Lemon

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Jan 12, 2015, 9:14:37 AM1/12/15

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OK,I use the netanim-3.105.I know someone else use ns-3.18 and it is ok but I have try to use it.

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wifi-wired-bridged4.xml

John Abraham

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Jan 12, 2015, 11:12:49 AM1/12/15

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thats interesting the xml is missing the header information about nodes

Typically it starts with something like

but yours starts directly with node update with declaring the nodes.

Did you edit the xml directly?

L Lemon

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Jan 12, 2015, 8:07:33 PM1/12/15

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Thank you for your reply,but I'm not familiar with xml,I did not edit the xml.

I just use " anim = ns.netanim.AnimationInterface("/tmp/xml/wifi-wired-bridged4.xml")

anim.EnablePacketMetadata (True)" to generate the xml file and update the nodes and color.

some of the code like follows:

rv = os.path.isdir("/tmp/xml")

if rv is False:

os.mkdir("/tmp/xml")

anim = ns.netanim.AnimationInterface("/tmp/xml/wifi-wired-bridged4.xml")

anim.EnablePacketMetadata (True)

for n in nodes:

nodename = n.get('name', None)

nodetype = n.get('type', None)

nodemob = n.get('mobility', None)

nodepos = n.get('position', None)

nodevel = n.get('velocity', None)

nodeip = n.get('ip', None)

if nodetype is 'host':

addfunc = net.addHost

color = (255, 0, 0)

elif nodetype is 'switch':

addfunc = net.addSwitch

color = (0, 0, 255)

else:

addfunc = None

if nodename is None or addfunc is None:

continue

node = addfunc (nodename, ip=nodeip)

mininet.ns3.setMobilityModel (node, nodemob)

if nodepos is not None:

mininet.ns3.setPosition (node, nodepos[0], nodepos[1], nodepos[2])

if nodevel is not None:

mininet.ns3.setVelocity (node, nodevel[0], nodevel[1], nodevel[2])

wifinodes.append (node)

anim.UpdateNodeDescription (node.nsNode, nodename+'-'+str(node.nsNode.GetId()))

anim.UpdateNodeColor (node.nsNode, color[0], color[1], color[2])

It seems the update procedure is inconsistent.

John Abraham

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Jan 12, 2015, 10:01:47 PM1/12/15

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another way this might happen is that the nodes are created after the AnimationInterface object is created

usually AnimationInterface is created as close as possible to Simulator::Run()

L Lemon

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Jan 13, 2015, 3:07:01 AM1/13/15

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It really is the case!I add the AnimationInterface after the creating of nodes and it runs OK now.The same case is the pcap files.Both of them should be created as close as possible to the Simulator::Run().

Thank you very much for your help!

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