How can a real applications installed on PC connect to nodes in NS-3?

[sen]

I modified the code of the example(ns-allinone-3.19\ns-3.19\src\fd-net-device\examples\fd-tap-ping.cc) 

to create a tap0 (ip:192.168.202.1) by using the TapFdNetDeviceHelper.

I also create a node0 (ip:192.168.202.2)

Now i can ping the tap0 and node0 successfully on the PC(eth0: 192.168.203.150)

If i create another tap0 (ip:192.168.202.3) and node1 (ip:192.168.202.4) using the similar way, i ping the tap1

successfully. But i can not connect the node1. How?

In a word, my problem is: 

How can a real applications installed on PC connect to node0 and node1 (node0 and node1 are in the same wlan) in NS-3?

I don't understand the TapFdNetDevice. 

Any node should install a FdNetDevice if they want to connect to a "real" host?

part of my code:

std::string network ("192.168.202.0");

std::string mask ("255.255.255.0");

Ipv4Address tapNetwork (network.c_str ());

Ipv4Mask tapMask (mask.c_str ());

Ipv4AddressHelper addresses;

addresses.SetBase (tapNetwork, tapMask);

std::string deviceName ("tap0");

TapFdNetDeviceHelper helper;

helper.SetDeviceName (deviceName);

helper.SetModePi (modePi);

NodeContainer nodes;

nodes.Create (2);

  

Ipv4Address tapIp = addresses.NewAddress ();

helper.SetTapIpv4Address (tapIp);

helper.SetTapIpv4Mask (tapMask);

NetDeviceContainer devices = helper.Install (nodes.Get(0));

Ptr<NetDevice> device = devices.Get (0);

// Add an address to the ns-3 device in the same network than one assigned to the TAP.

Ptr<Ipv4> ipv4 = nodes.Get(0)->GetObject<Ipv4> ();

uint32_t interface = ipv4->AddInterface (device);

Ipv4Address devIp = addresses.NewAddress ();

Ipv4InterfaceAddress address = Ipv4InterfaceAddress (devIp, tapMask);

ipv4->AddAddress (interface, address);

ipv4->SetMetric (interface, 1);

ipv4->SetUp (interface);

////------------------------

std::string deviceName2 ("tap1");

TapFdNetDeviceHelper helper2;

helper2.SetDeviceName (deviceName2);

helper2.SetModePi (modePi);

Ipv4Address tapIp2 = addresses.NewAddress ();

helper2.SetTapIpv4Address (tapIp2);

helper2.SetTapIpv4Mask (tapMask);

  

NetDeviceContainer devices2 = helper2.Install (nodes.Get(1));

Ptr<NetDevice> device2 = devices2.Get (0);

// Add an address to the ns-3 device in the same network than one assigned to the TAP.

Ptr<Ipv4> ipv42 = nodes.Get(1)->GetObject<Ipv4> ();

uint32_t interface2 = ipv42->AddInterface (device2);

Ipv4Address devIp2 = addresses.NewAddress ();

Ipv4InterfaceAddress address2 = Ipv4InterfaceAddress (devIp2, tapMask);

ipv42->AddAddress (interface2, address2);

ipv42->SetMetric (interface2, 1);

ipv42->SetUp (interface2);

[sen]

network topology that looks like below:

|wifi node0

real app on pc<-------->NS-3|wifi node1

|wifi node2

在 2017年6月19日星期一 UTC+8上午12:34:23，sen写道：

[Tommaso Pecorella]

Hi,

only ONE node should have the FdNetDevice, and it will be the gateway between ns-3 and your PC.

You could install more than one, but they'll need to be in different subnets (on the external part).

As a side note, upgrade to 3.26, you have no reasons to use 3.19 (and we can not provide help on that version).

T.