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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 "OSPFNeighborStateExchangeStart.h"
00019 #include "OSPFNeighborStateDown.h"
00020 #include "OSPFNeighborStateInit.h"
00021 #include "OSPFNeighborStateTwoWay.h"
00022 #include "OSPFNeighborStateExchange.h"
00023 #include "MessageHandler.h"
00024 #include "OSPFInterface.h"
00025 #include "OSPFArea.h"
00026 #include "OSPFRouter.h"
00027 
00028 void OSPF::NeighborStateExchangeStart::ProcessEvent(OSPF::Neighbor* neighbor, OSPF::Neighbor::NeighborEventType event)
00029 {
00030     if ((event == OSPF::Neighbor::KillNeighbor) || (event == OSPF::Neighbor::LinkDown)) {
00031         MessageHandler* messageHandler = neighbor->GetInterface()->GetArea()->GetRouter()->GetMessageHandler();
00032         neighbor->Reset();
00033         messageHandler->ClearTimer(neighbor->GetInactivityTimer());
00034         ChangeState(neighbor, new OSPF::NeighborStateDown, this);
00035     }
00036     if (event == OSPF::Neighbor::InactivityTimer) {
00037         neighbor->Reset();
00038         if (neighbor->GetInterface()->GetType() == OSPF::Interface::NBMA) {
00039             MessageHandler* messageHandler = neighbor->GetInterface()->GetArea()->GetRouter()->GetMessageHandler();
00040             messageHandler->StartTimer(neighbor->GetPollTimer(), neighbor->GetInterface()->GetPollInterval());
00041         }
00042         ChangeState(neighbor, new OSPF::NeighborStateDown, this);
00043     }
00044     if (event == OSPF::Neighbor::OneWayReceived) {
00045         neighbor->Reset();
00046         ChangeState(neighbor, new OSPF::NeighborStateInit, this);
00047     }
00048     if (event == OSPF::Neighbor::HelloReceived) {
00049         MessageHandler* messageHandler = neighbor->GetInterface()->GetArea()->GetRouter()->GetMessageHandler();
00050         messageHandler->ClearTimer(neighbor->GetInactivityTimer());
00051         messageHandler->StartTimer(neighbor->GetInactivityTimer(), neighbor->GetRouterDeadInterval());
00052     }
00053     if (event == OSPF::Neighbor::IsAdjacencyOK) {
00054         if (!neighbor->NeedAdjacency()) {
00055             neighbor->Reset();
00056             ChangeState(neighbor, new OSPF::NeighborStateTwoWay, this);
00057         }
00058     }
00059     if (event == OSPF::Neighbor::DDRetransmissionTimer) {
00060         MessageHandler* messageHandler = neighbor->GetInterface()->GetArea()->GetRouter()->GetMessageHandler();
00061         neighbor->RetransmitDatabaseDescriptionPacket();
00062         messageHandler->StartTimer(neighbor->GetDDRetransmissionTimer(), neighbor->GetInterface()->GetRetransmissionInterval());
00063     }
00064     if (event == OSPF::Neighbor::NegotiationDone) {
00065         neighbor->CreateDatabaseSummary();
00066         neighbor->SendDatabaseDescriptionPacket();
00067         MessageHandler* messageHandler = neighbor->GetInterface()->GetArea()->GetRouter()->GetMessageHandler();
00068         messageHandler->ClearTimer(neighbor->GetDDRetransmissionTimer());
00069         ChangeState(neighbor, new OSPF::NeighborStateExchange, this);
00070     }
00071 }