ansaOspfInterfaceStateDesignatedRouter6.cc

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//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public License
// along with this program.  If not, see http://www.gnu.org/licenses/.
// 
#include "ansaOspfArea6.h"
#include "ansaOspfRouter6.h"

#include "ansaOspfInterfaceStateDown6.h"
#include "ansaOspfInterfaceStateLoopback6.h"
#include "ansaOspfInterfaceStateDesignatedRouter6.h"

void AnsaOspf6::InterfaceStateDesignatedRouter::ProcessEvent(AnsaOspf6::Interface* intf, AnsaOspf6::Interface::InterfaceEventType event){

   if (event == AnsaOspf6::Interface::NeighborChange){
      CalculateDesignatedRouter(intf);
   }

   if (event == AnsaOspf6::Interface::InterfaceDown){
      intf->SetIsGoingDown(true);
      intf->Reset();
      ChangeState(intf, new AnsaOspf6::InterfaceStateDown, this);
      intf->SetIsGoingDown(false);
   }

   if (event == AnsaOspf6::Interface::LoopIndication){
      intf->Reset();
      ChangeState(intf, new AnsaOspf6::InterfaceStateLoopback, this);
   }

   if (event == AnsaOspf6::Interface::HelloTimer) {
      if (intf->GetType() == AnsaOspf6::Interface::Broadcast){
         intf->SendHelloPacket(AnsaOspf6::AllSPFRouters);
      }else{    // AnsaOspf6::Interface::NBMA
         unsigned long neighborCount = intf->GetNeighborCount();
         int ttl = (intf->GetType() == AnsaOspf6::Interface::Virtual) ? VIRTUAL_LINK_TTL : 1;
         for (unsigned long i = 0; i < neighborCount; i++) {
            intf->SendHelloPacket(intf->GetNeighbor(i)->GetAddress(), ttl);
         }
      }
      intf->GetArea()->GetRouter()->GetMessageHandler()->StartTimer(intf->GetHelloTimer(), intf->GetHelloInterval());
   }

   if (event == AnsaOspf6::Interface::AcknowledgementTimer) {
      intf->SendDelayedAcknowledgements();
   }
}