00001 00002 /* 00003 * dewp.h 00004 * Copyright (C) 1999 by the University of Southern California 00005 * $Id: dewp.h,v 1.2 2005/08/25 18:58:03 johnh Exp $ 00006 * 00007 * This program is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU General Public License, 00009 * version 2, as published by the Free Software Foundation. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License along 00017 * with this program; if not, write to the Free Software Foundation, Inc., 00018 * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 00019 * 00020 * 00021 * The copyright of this module includes the following 00022 * linking-with-specific-other-licenses addition: 00023 * 00024 * In addition, as a special exception, the copyright holders of 00025 * this module give you permission to combine (via static or 00026 * dynamic linking) this module with free software programs or 00027 * libraries that are released under the GNU LGPL and with code 00028 * included in the standard release of ns-2 under the Apache 2.0 00029 * license or under otherwise-compatible licenses with advertising 00030 * requirements (or modified versions of such code, with unchanged 00031 * license). You may copy and distribute such a system following the 00032 * terms of the GNU GPL for this module and the licenses of the 00033 * other code concerned, provided that you include the source code of 00034 * that other code when and as the GNU GPL requires distribution of 00035 * source code. 00036 * 00037 * Note that people who make modified versions of this module 00038 * are not obligated to grant this special exception for their 00039 * modified versions; it is their choice whether to do so. The GNU 00040 * General Public License gives permission to release a modified 00041 * version without this exception; this exception also makes it 00042 * possible to release a modified version which carries forward this 00043 * exception. 00044 * 00045 */ 00046 00047 // 00048 // dewp.h (Early worm propagation detection) 00049 // by Xuan Chen (xuanc@isi.edu), USC/ISI 00050 00051 #ifndef DEWP_H 00052 #define DEWP_H 00053 00054 #include "packet.h" 00055 #include "dsPolicy.h" 00056 00057 #define DT_INV 2 00058 #define DB_INV DT_INV 00059 #define P_LEN 65536 00060 00061 // list to store addresses 00062 struct AddrEntry { 00063 unsigned int addr; 00064 struct AddrEntry *next; 00065 }; 00066 00067 // List for blocked port 00068 struct BPEntry { 00069 int s, b; 00070 int anum, last_anum, avg_anum; 00071 double last_time; 00072 struct AddrEntry *aset; 00073 }; 00074 00075 // Eearly worm propagation detection policy 00076 class DEWPPolicy : public Policy { 00077 public: 00078 DEWPPolicy(); 00079 ~DEWPPolicy(); 00080 00081 void init(double); 00082 00083 // Metering and policing methods: 00084 void applyMeter(policyTableEntry *policy, Packet *pkt); 00085 int applyPolicer(policyTableEntry *policy, policerTableEntry *policer, Packet *pkt); 00086 00087 // make packet drop decisions 00088 int dropPacket(Packet *); 00089 // detect if there is an alarm triggered 00090 void detect(Packet *pkt); 00091 00092 // couple in- and out-bound queues 00093 void couple(DEWPPolicy *); 00094 00095 //protected: 00096 DEWPPolicy *cdewp; 00097 00098 double dport_list[P_LEN]; 00099 static BPEntry *bport_list; 00100 00101 private: 00102 // The current time 00103 double now; 00104 00105 // commom paramters 00106 // detection interval 00107 static double dt_inv_; 00108 // change tolerance 00109 static double beta; 00110 // gain 00111 static double alpha; 00112 // absolute threshold to filter out some small values (num/s) 00113 static int anum_th; 00114 }; 00115 00116 //int *DEWPPolicy::bport_list = NULL; 00117 00118 #endif
1.7.1