src/networkPrefix.cpp

   1 /*
   2  *  anytun
   3  *
   4  *  The secure anycast tunneling protocol (satp) defines a protocol used
   5  *  for communication between any combination of unicast and anycast
   6  *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
   7  *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
   8  *  ethernet, ip, arp ...). satp directly includes cryptography and
   9  *  message authentication based on the methodes used by SRTP.  It is
  10  *  intended to deliver a generic, scaleable and secure solution for
  11  *  tunneling and relaying of packets of any protocol.
  12  *
  13  *
  14  *  Copyright (C) 2007-2008 Othmar Gsenger, Erwin Nindl,
  15  *                          Christian Pointner <satp@wirdorange.org>
  16  *
  17  *  This file is part of Anytun.
  18  *
  19  *  Anytun is free software: you can redistribute it and/or modify
  20  *  it under the terms of the GNU General Public License version 3 as
  21  *  published by the Free Software Foundation.
  22  *
  23  *  Anytun is distributed in the hope that it will be useful,
  24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *  GNU General Public License for more details.
  27  *
  28  *  You should have received a copy of the GNU General Public License
  29  *  along with anytun.  If not, see <http://www.gnu.org/licenses/>.
  30  */
  31
  32 #include "threadUtils.hpp"
  33 #include "datatypes.h"
  34
  35 #include "networkPrefix.h"
  36
  37
  38 NetworkPrefix::NetworkPrefix(): NetworkAddress(),length_(0)
  39 {
  40 }
  41
  42 NetworkPrefix::NetworkPrefix(const NetworkAddress & src,uint8_t length): NetworkAddress(src),length_(length)
  43 {
  44 }
  45
  46 NetworkPrefix::NetworkPrefix(const NetworkPrefix & src): NetworkAddress(src),length_(src.length_)
  47 {
  48 }
  49
  50 void NetworkPrefix::setNetworkPrefixLength(uint8_t length )
  51 {
  52         length_ = length;
  53         if (network_address_type_==ipv4)
  54         {
  55                 in_addr v4addr;
  56                 v4addr.s_addr=0xFFFFFFFF;
  57                 *this &= (NetworkAddress(v4addr)<<(32-length));
  58         } else if (network_address_type_==ipv6) {
  59                 in6_addr v6addr;
  60                 for(int i=0;i<4;i++)
  61 #if defined(__GNUC__) && defined(__linux__)
  62                         ipv6_address_.s6_addr32[i]=0xFFFFFFFF;
  63 #elif defined(__GNUC__) && defined(__OpenBSD__)
  64       ipv6_address_.__u6_addr.__u6_addr32[i]=0xFFFFFFFF;
  65 #else
  66  #error Target not supported
  67 #endif
  68
  69                 *this &= (NetworkAddress(v6addr)<<(128-length));
  70         } else if (network_address_type_==ethernet) {
  71                 //TODO
  72         } else {
  73                 //TODO
  74         }
  75 }
  76
  77 uint8_t NetworkPrefix::getNetworkPrefixLength()
  78 {
  79         return length_;
  80 }
  81
  82
  83 bool NetworkPrefix::operator<(const NetworkPrefix &right) const
  84 {
  85         if (network_address_type_!=right.network_address_type_)
  86                 return false;
  87         if (NetworkAddress::operator<(static_cast<NetworkAddress>(right)))
  88                 return true;
  89         static_cast<NetworkAddress>(right)<static_cast<NetworkAddress>(*this);
  90         return (right.length_<length_);
  91 }
  92