Check for ACK in Callback - WifiMacHeader

[Gabriel Casella]

Hello,

I'm using the 'wifi-adhoc.cc' example to get the 'WifiMacHeader' from the packet inside the callback function.

The problem when I extract the 'WifiMacHeader' from the packet inside the 'ReceivePacket' callback I get nothing relevant, except of 'MGT_ASSOCIATION_REQUEST'.

Here is the way I'm trying:

void
Experiment::ReceivePacket (Ptr<Socket> socket)
{
  Ptr<Packet> packet;
  while ((packet = socket->Recv ()))
    {
      m_bytesTotal += packet->GetSize ();


      Ptr<Packet> copy = packet->Copy ();
      WifiMacHeader hdr;
      copy->RemoveHeader (hdr);
      //NS_LOG_UNCOND (hdr);
     
      if (hdr.IsAck ())
        {
          NS_LOG_UNCOND ("receive ack from=" << hdr.GetAddr1 ());
        }
    }
}

The 'if' is never 'true' and printing the 'hdr' always shows me this:

MGT_ASSOCIATION_REQUEST ToDS=0, FromDS=0, MoreFrag=0, Retry=0, MoreData=0 Duration/ID=0us, DA=00:00:00:00:00:00, SA=00:00:00:00:00:00, BSSID=00:00:00:00:00:00, FragNumber=0, SeqNumber=0

What am I doing wrong? This seems the way to do as I can tell by [1] and the 'PhyRx1kTrace (...)' from [2].
My script is attached if needed.

Sincerely,

[1]: https://groups.google.com/forum/#!topic/ns-3-users/wOZZMwjBuf0

[2]: https://groups.google.com/forum/#!topic/ns-3-users/Rvo06UmUkpc