[ndnSIM] Question for the course of packet trnamitting

[aaronishere at qq.com]

The processing is something like this:

[Consumer/Face] ReceiveInterest(interest) ->
[Face]     (registeredCallback)(Interest)    
            * registered callback is set from Forwarder via RegisterProtocolHandlers method

I'm not clear about how the RegisterProtocolHandlers method work.  
After [Face]m_upstreamInterestHandler (this, interest);, is there some function calling m_face-> RegisterProtocolHandlers? 

[ForwardingStrategy] onInterest, ..., PropagateInterest ->
[specific strategy, such as BestRoute] DoPropagateInterest ->
[ForwardingStrategy] TrySendOutInterest ->
[Face] sendInterest ->
I see.

[NetDeviceFace] (virtual call) Send ->
2. How does virtual call work?

bool ok = m_netDevice->Send (packet, m_netDevice->GetBroadcast (), 
L3Protocol::ETHERNET_FRAME_TYPE);
The Send (packet, m_netDevice->GetBroadcast (), L3Protocol::ETHERNET_FRAME_TYPE)  funciton should be a NS3 function right?

...
"actual" transmission through NS'3 NetDevice (NetDevice -> Channel -> NetDevice)
...
[NetDeviceFace] ReceiveFromNetDevice (registered callback to NetDevice) ->
Receive (p);
The Receive funciton is also from NS3?

[Face] Receive -> 
[Face] ReceiveInterest ->
[Face]     (registeredCallback)(Interest)    
            * registered callback is set from Forwarder via RegisterProtocolHandlers method
[ForwardingStrategy] onInterest, ..., PropagateInterest ->

Thanks you very much!


Aaron

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