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00001 //
00002 // Copyright (C) 2006 Andras Babos and Andras Varga
00003 //
00004 // This program is free software; you can redistribute it and/or
00005 // modify it under the terms of the GNU Lesser General Public License
00006 // as published by the Free Software Foundation; either version 2
00007 // of the License, or (at your option) any later version.
00008 //
00009 // This program is distributed in the hope that it will be useful,
00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 // GNU Lesser General Public License for more details.
00013 //
00014 // You should have received a copy of the GNU Lesser General Public License
00015 // along with this program; if not, see <http://www.gnu.org/licenses/>.
00016 //
00017 
00018 #include "OSPFNeighborStateInit.h"
00019 #include "OSPFNeighborStateDown.h"
00020 #include "OSPFNeighborStateExchangeStart.h"
00021 #include "OSPFNeighborStateTwoWay.h"
00022 #include "MessageHandler.h"
00023 #include "OSPFInterface.h"
00024 #include "OSPFArea.h"
00025 #include "OSPFRouter.h"
00026 
00027 void OSPF::NeighborStateInit::ProcessEvent(OSPF::Neighbor* neighbor, OSPF::Neighbor::NeighborEventType event)
00028 {
00029     if ((event == OSPF::Neighbor::KillNeighbor) || (event == OSPF::Neighbor::LinkDown)) {
00030         MessageHandler* messageHandler = neighbor->GetInterface()->GetArea()->GetRouter()->GetMessageHandler();
00031         neighbor->Reset();
00032         messageHandler->ClearTimer(neighbor->GetInactivityTimer());
00033         ChangeState(neighbor, new OSPF::NeighborStateDown, this);
00034     }
00035     if (event == OSPF::Neighbor::InactivityTimer) {
00036         neighbor->Reset();
00037         if (neighbor->GetInterface()->GetType() == OSPF::Interface::NBMA) {
00038             MessageHandler* messageHandler = neighbor->GetInterface()->GetArea()->GetRouter()->GetMessageHandler();
00039             messageHandler->StartTimer(neighbor->GetPollTimer(), neighbor->GetInterface()->GetPollInterval());
00040         }
00041         ChangeState(neighbor, new OSPF::NeighborStateDown, this);
00042     }
00043     if (event == OSPF::Neighbor::HelloReceived) {
00044         MessageHandler* messageHandler = neighbor->GetInterface()->GetArea()->GetRouter()->GetMessageHandler();
00045         messageHandler->ClearTimer(neighbor->GetInactivityTimer());
00046         messageHandler->StartTimer(neighbor->GetInactivityTimer(), neighbor->GetRouterDeadInterval());
00047     }
00048     if (event == OSPF::Neighbor::TwoWayReceived) {
00049         if (neighbor->NeedAdjacency()) {
00050             MessageHandler* messageHandler = neighbor->GetInterface()->GetArea()->GetRouter()->GetMessageHandler();
00051             if (!(neighbor->IsFirstAdjacencyInited())) {
00052                 neighbor->InitFirstAdjacency();
00053             } else {
00054                 neighbor->IncrementDDSequenceNumber();
00055             }
00056             neighbor->SendDatabaseDescriptionPacket(true);
00057             messageHandler->StartTimer(neighbor->GetDDRetransmissionTimer(), neighbor->GetInterface()->GetRetransmissionInterval());
00058             ChangeState(neighbor, new OSPF::NeighborStateExchangeStart, this);
00059         } else {
00060             ChangeState(neighbor, new OSPF::NeighborStateTwoWay, this);
00061         }
00062     }
00063 }