Please help me with link failure in DCE Linux kernel
Michal Travnicek
//
// n2-------
// / |
// / |
// n0 ns3----n4-----n5
// \
/ |
// \
/ |
// n1----------------
//
#include <iostream>
#include <fstream>
#include <string>
#include <cassert>
#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/internet-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/applications-module.h"
#include "ns3/ipv4-global-routing-helper.h"
#include "ns3/dce-module.h"
using namespace ns3;
static std::string Ipv4AddressToString (Ipv4Address ad)
{
std::ostringstream oss;
ad.Print (oss);
return oss.str ();
}
NS_LOG_COMPONENT_DEFINE ("DceNavrh");
int
main (int argc, char *argv[])
{
CommandLine cmd;
cmd.Parse (argc, argv);
NodeContainer c;
c.Create (6);
NodeContainer n0n2 = NodeContainer
(c.Get (0), c.Get (2));
NodeContainer n0n1 = NodeContainer (c.Get
(0), c.Get (1));
NodeContainer n2n4 = NodeContainer
(c.Get (2), c.Get (4));
NodeContainer n1n3 = NodeContainer
(c.Get (1), c.Get (3));
NodeContainer n3n4 = NodeContainer
(c.Get (3), c.Get (4));
NodeContainer n1n5 = NodeContainer
(c.Get (1), c.Get (5));
NodeContainer n4n5 = NodeContainer
(c.Get (4), c.Get (5));
DceManagerHelper dceManager;
dceManager.SetNetworkStack
("ns3::LinuxSocketFdFactory", "Library", StringValue ("liblinux.so"));
LinuxStackHelper stack;
stack.Install (c);
PointToPointHelper p2p;
p2p.SetDeviceAttribute
("DataRate", StringValue ("768kbps")); //768kbsp
p2p.SetChannelAttribute
("Delay", StringValue ("0ms"));
NetDeviceContainer d0d2 = p2p.Install
(n0n2);
NetDeviceContainer d0d1 = p2p.Install
(n0n1);
NetDeviceContainer d2d4 = p2p.Install
(n2n4);
NetDeviceContainer d1d3 = p2p.Install
(n1n3);
NetDeviceContainer d3d4 = p2p.Install
(n3n4);
NetDeviceContainer d1d5 = p2p.Install
(n1n5);
NetDeviceContainer d4d5 = p2p.Install
(n4n5);
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.0.20.0",
"255.255.255.0");
Ipv4InterfaceContainer i0i2 =
ipv4.Assign (d0d2);
ipv4.SetBase ("10.0.10.0",
"255.255.255.0");
Ipv4InterfaceContainer i0i1 =
ipv4.Assign (d0d1);
ipv4.SetBase ("10.20.40.0",
"255.255.255.0");
Ipv4InterfaceContainer i2i4 =
ipv4.Assign (d2d4);
ipv4.SetBase ("10.10.30.0",
"255.255.255.0");
Ipv4InterfaceContainer i1i3 =
ipv4.Assign (d1d3);
ipv4.SetBase ("10.30.40.0",
"255.255.255.0");
Ipv4InterfaceContainer i3i4 =
ipv4.Assign (d3d4);
ipv4.SetBase ("10.10.50.0",
"255.255.255.0");
Ipv4InterfaceContainer i1i5 =
ipv4.Assign (d1d5);
ipv4.SetBase ("10.40.50.0",
"255.255.255.0");
Ipv4InterfaceContainer i4i5 =
ipv4.Assign (d4d5);
Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
dceManager.Install (c);
DceApplicationHelper process;
ApplicationContainer apps;
std::ostringstream oss;
process.SetBinary
("udp-perf");
process.AddArgument
("--duration=100");
process.AddArgument (oss.str ().c_str
());
oss.clear ();
apps = process.Install
(c.Get(0));
apps.Start (Seconds (1.0));
process.SetBinary
("udp-perf");
process.ResetArguments ();
process.AddArgument ("--pktsize=1024");
process.AddArgument (oss.str ().c_str
());
oss.clear ();
process.AddArgument
("--port=9");
process.AddArgument (oss.str ().c_str
());
oss.clear ();
process.AddArgument
("--client");
process.AddArgument (oss.str ().c_str
());
oss.clear ();
oss.str ("");
oss << "--host="
<< Ipv4AddressToString ("10.0.10.1");
process.AddArgument (oss.str ().c_str
());
oss.clear ();
oss.str ("");
process.AddArgument
("--duration=100");
apps = process.Install
(c.Get(5));
apps.Start (Seconds (1.0));
p2p.EnablePcapAll
("merenidce/uzel");
Ptr<Node> n1 = c.Get (1);
Ptr<Ipv4> ipv43 =
n1->GetObject<Ipv4> ();
// The first ifIndex is 0 for loopback, then the first p2p is numbered 1,
// then the next p2p is numbered 2
uint32_t ifIndex3 = 3; // interface 2 on node 1 connecting node 1 with node 5
Simulator::Schedule (Seconds
(60.0),&Ipv4::SetDown,ipv43, ifIndex3);
Simulator::Stop (Seconds
(100.0));
Simulator::Run ();
Simulator::Destroy ();
return 0;
}
Hajime Tazaki
Hi,
I looked at your script.
The reason of SEGV is the ifindex specified for link down
(SetDown).
If I changed the following line from 3 to 2, SEGV was
disappeared.
uint32_t ifIndex3 = 3; // interface 2 on node 1 connecting node 1 with node 5
guessed, but loopback interface is not correctly counted IF
you used DCE linux.
I'm going to find a solution of this issue, but for a
workaround, you can specify the different ifindex for your
simulation.
-- Hajime
At Mon, 15 Apr 2013 13:37:25 -0700 (PDT),
Michal Travnicek wrote:
>
> [1 <text/plain; ISO-8859-1 (7bit)>]
Michal Travnicek
thanks a lot for your answer. I tried to change interface number but it didn`t help. Well, it doesn`t show SIGSEGV error now, but the simulation runs and no link failure occurs. So it runs like normal simulation with no failure. I also tried to set down some other interfaces on different nodes, but the result was the same.
Dne středa, 17. dubna 2013 9:11:59 UTC+2 Hajime napsal(a):
Hajime Tazaki
Hi,
currently, DCE requires additional call after
Ipv4GlobalRoutingHelper::PopulateRoutingTables () due to
lack of enough implementation of routing table
manipulation. so first, you can add the following call after
Ipv4GlobalRoutingHelper::PopulateRoutingTables.
LinuxStackHelper::PopulateRoutingTables ();
next, DCE currently doesn't implement netdevice state,
though SetDown method is available. The method is simply set
an internal state but nobody look at that state so, all the
traffic pass to the network device even if the SetDown is
called. and routing daemons/protocols are not interact with
this state either.
it would be nice to support such a feature for DCE, but I
can't tell when it would be.
-- Hajime
At Wed, 17 Apr 2013 11:55:27 -0700 (PDT),
Michal Travnicek wrote:
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