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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 "LSA.h"
00019 
00020 bool OSPF::RouterLSA::Update(const OSPFRouterLSA* lsa)
00021 {
00022     bool different = DiffersFrom(lsa);
00023     (*this) = (*lsa);
00024     ResetInstallTime();
00025     if (different) {
00026         ClearNextHops();
00027         return true;
00028     } else {
00029         return false;
00030     }
00031 }
00032 
00033 bool OSPF::RouterLSA::DiffersFrom(const OSPFRouterLSA* routerLSA) const
00034 {
00035     const OSPFLSAHeader& lsaHeader = routerLSA->getHeader();
00036     bool differentHeader = ((header_var.getLsOptions() != lsaHeader.getLsOptions()) ||
00037                             ((header_var.getLsAge() == MAX_AGE) && (lsaHeader.getLsAge() != MAX_AGE)) ||
00038                             ((header_var.getLsAge() != MAX_AGE) && (lsaHeader.getLsAge() == MAX_AGE)) ||
00039                             (header_var.getLsaLength() != lsaHeader.getLsaLength()));
00040     bool differentBody   = false;
00041 
00042     if (!differentHeader) {
00043         differentBody = ((V_VirtualLinkEndpoint_var != routerLSA->getV_VirtualLinkEndpoint()) ||
00044                          (E_ASBoundaryRouter_var != routerLSA->getE_ASBoundaryRouter()) ||
00045                          (B_AreaBorderRouter_var != routerLSA->getB_AreaBorderRouter()) ||
00046                          (numberOfLinks_var != routerLSA->getNumberOfLinks()) ||
00047                          (links_arraysize != routerLSA->getLinksArraySize()));
00048 
00049         if (!differentBody) {
00050             unsigned int linkCount = links_arraysize;
00051             for (unsigned int i = 0; i < linkCount; i++) {
00052                 bool differentLink = ((links_var[i].getLinkID() != routerLSA->getLinks(i).getLinkID()) ||
00053                                       (links_var[i].getLinkData() != routerLSA->getLinks(i).getLinkData()) ||
00054                                       (links_var[i].getType() != routerLSA->getLinks(i).getType()) ||
00055                                       (links_var[i].getNumberOfTOS() != routerLSA->getLinks(i).getNumberOfTOS()) ||
00056                                       (links_var[i].getLinkCost() != routerLSA->getLinks(i).getLinkCost()) ||
00057                                       (links_var[i].getTosDataArraySize() != routerLSA->getLinks(i).getTosDataArraySize()));
00058 
00059                 if (!differentLink) {
00060                     unsigned int tosCount = links_var[i].getTosDataArraySize();
00061                     for (unsigned int j = 0; j < tosCount; j++) {
00062                         bool differentTOS = ((links_var[i].getTosData(j).tos != routerLSA->getLinks(i).getTosData(j).tos) ||
00063                                              (links_var[i].getTosData(j).tosMetric[0] != routerLSA->getLinks(i).getTosData(j).tosMetric[0]) ||
00064                                              (links_var[i].getTosData(j).tosMetric[1] != routerLSA->getLinks(i).getTosData(j).tosMetric[1]) ||
00065                                              (links_var[i].getTosData(j).tosMetric[2] != routerLSA->getLinks(i).getTosData(j).tosMetric[2]));
00066 
00067                         if (differentTOS) {
00068                             differentLink = true;
00069                             break;
00070                         }
00071                     }
00072                 }
00073 
00074                 if (differentLink) {
00075                     differentBody = true;
00076                     break;
00077                 }
00078             }
00079         }
00080     }
00081 
00082     return (differentHeader || differentBody);
00083 }