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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 "OSPFNeighborStateTwoWay.h"
00019 #include "OSPFNeighborStateDown.h"
00020 #include "OSPFNeighborStateInit.h"
00021 #include "OSPFNeighborStateExchangeStart.h"
00022 #include "MessageHandler.h"
00023 #include "OSPFInterface.h"
00024 #include "OSPFArea.h"
00025 #include "OSPFRouter.h"
00026 
00027 void OSPF::NeighborStateTwoWay::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::OneWayReceived) {
00044         neighbor->Reset();
00045         ChangeState(neighbor, new OSPF::NeighborStateInit, this);
00046     }
00047     if (event == OSPF::Neighbor::HelloReceived) {
00048         MessageHandler* messageHandler = neighbor->GetInterface()->GetArea()->GetRouter()->GetMessageHandler();
00049         messageHandler->ClearTimer(neighbor->GetInactivityTimer());
00050         messageHandler->StartTimer(neighbor->GetInactivityTimer(), neighbor->GetRouterDeadInterval());
00051     }
00052     if (event == OSPF::Neighbor::IsAdjacencyOK) {
00053         if (neighbor->NeedAdjacency()) {
00054             MessageHandler* messageHandler = neighbor->GetInterface()->GetArea()->GetRouter()->GetMessageHandler();
00055             if (!(neighbor->IsFirstAdjacencyInited())) {
00056                 neighbor->InitFirstAdjacency();
00057             } else {
00058                 neighbor->IncrementDDSequenceNumber();
00059             }
00060             neighbor->SendDatabaseDescriptionPacket(true);
00061             messageHandler->StartTimer(neighbor->GetDDRetransmissionTimer(), neighbor->GetInterface()->GetRetransmissionInterval());
00062             ChangeState(neighbor, new OSPF::NeighborStateExchangeStart, this);
00063         }
00064     }
00065 }