src/kademlia/routing/Contact.cpp

   1 //
   2 // This file is part of aMule Project
   3 //
   4 // Copyright (c) 2004-2008 Angel Vidal ( kry@amule.org )
   5 // Copyright (c) 2003-2008 aMule Team ( admin@amule.org / http://www.amule.org )
   6 // Copyright (c) 2003-2008 Barry Dunne ( http://www.emule-project.net )
   7
   8 // This program is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU General Public License
  10 // as published by the Free Software Foundation; either
  11 // version 2 of the License, or (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
  21
  22 // This work is based on the java implementation of the Kademlia protocol.
  23 // Kademlia: Peer-to-peer routing based on the XOR metric
  24 // Copyright (c) 2002  Petar Maymounkov ( petar@post.harvard.edu )
  25 // http://kademlia.scs.cs.nyu.edu
  26
  27 // Note To Mods //
  28 /*
  29 Please do not change anything here and release it..
  30 There is going to be a new forum created just for the Kademlia side of the client..
  31 If you feel there is an error or a way to improve something, please
  32 post it in the forum first and let us look at it.. If it is a real improvement,
  33 it will be added to the offical client.. Changing something without knowing
  34 what all it does can cause great harm to the network if released in mass form..
  35 Any mod that changes anything within the Kademlia side will not be allowed to advertise
  36 there client on the eMule forum..
  37 */
  38
  39 #include "Contact.h"
  40
  41 #include <common/Macros.h>
  42
  43 #include "../../Statistics.h"
  44
  45 ////////////////////////////////////////
  46 using namespace Kademlia;
  47 ////////////////////////////////////////
  48
  49 CContact::~CContact()
  50 {
  51         theStats::RemoveKadNode();
  52 }
  53
  54 CContact::CContact(const CUInt128 &clientID, uint32_t ip, uint16_t udpPort, uint16_t tcpPort, uint8_t version, const CKadUDPKey& key, bool ipVerified, const CUInt128 &target)
  55         : m_clientID(clientID),
  56           m_distance(target ^ clientID),
  57           m_ip(ip),
  58           m_tcpPort(tcpPort),
  59           m_udpPort(udpPort),
  60           m_type(3),
  61           m_lastTypeSet(time(NULL)),
  62           m_expires(0),
  63           m_created(m_lastTypeSet),
  64           m_inUse(0),
  65           m_version(version),
  66           m_checkKad2(true),
  67           m_ipVerified(ipVerified),
  68           m_receivedHelloPacket(false),
  69           m_udpKey(key)
  70 {
  71         wxASSERT(udpPort);
  72         theStats::AddKadNode();
  73 }
  74
  75 CContact::CContact(const CContact& k1)
  76 {
  77         *this = k1;
  78         theStats::AddKadNode();
  79 }
  80
  81 void CContact::CheckingType() throw()
  82 {
  83         time_t now = time(NULL);
  84
  85         if(now - m_lastTypeSet < 10 || m_type == 4) {
  86                 return;
  87         }
  88
  89         m_lastTypeSet = now;
  90
  91         m_expires = now + MIN2S(2);
  92         m_type++;
  93 }
  94
  95 void CContact::UpdateType() throw()
  96 {
  97         time_t now = time(NULL);
  98         uint32_t hours = (now - m_created) / HR2S(1);
  99         switch (hours) {
 100                 case 0:
 101                         m_type = 2;
 102                         m_expires = now + HR2S(1);
 103                         break;
 104                 case 1:
 105                         m_type = 1;
 106                         m_expires = now + MIN2S(90); //HR2S(1.5)
 107                         break;
 108                 default:
 109                         m_type = 0;
 110                         m_expires = now + HR2S(2);
 111         }
 112 }
 113
 114 time_t CContact::GetLastSeen() const throw()
 115 {
 116         // calculating back from expire time, so we don't need an additional field.
 117         // might result in wrong values if doing CheckingType() for example, so don't use for important timing stuff
 118         if (m_expires != 0) {
 119                 switch (m_type) {
 120                         case 2: return m_expires - HR2S(1);
 121                         case 1: return m_expires - MIN2S(90) /*(unsigned)HR2S(1.5)*/;
 122                         case 0: return m_expires - HR2S(2);
 123                 }
 124         }
 125         return 0;
 126 }
 127 // File_checked_for_headers