connectionList.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 anytun.org <satp@wirdorange.org>
  15  *
  16  *  This program is free software; you can redistribute it and/or modify
  17  *  it under the terms of the GNU General Public License version 2
  18  *  as published by the Free Software Foundation.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  *  GNU General Public License for more details.
  24  *
  25  *  You should have received a copy of the GNU General Public License
  26  *  along with this program (see the file COPYING included with this
  27  *  distribution); if not, write to the Free Software Foundation, Inc.,
  28  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  29  */
  30
  31 #include "threadUtils.hpp"
  32 #include "datatypes.h"
  33 #include "keyDerivationFactory.h"
  34
  35 #include "connectionList.h"
  36
  37 ConnectionList::ConnectionList()
  38 {
  39 }
  40
  41 ConnectionList::~ConnectionList()
  42 {
  43 /*  Lock lock(mutex_);
  44         ConnectionMap::iterator it;
  45         for(it = connections_.begin(); it != connections_.end(); ++it)
  46         {
  47                 //delete &it->second.kd_;
  48         }
  49 */
  50 }
  51
  52 void ConnectionList::addConnection(ConnectionParam &conn, u_int16_t mux )
  53 {
  54   Lock lock(mutex_);
  55
  56   std::pair<ConnectionMap::iterator, bool> ret = connections_.insert(ConnectionMap::value_type(mux, conn));
  57   if(!ret.second)
  58   {
  59     connections_.erase(ret.first);
  60     connections_.insert(ConnectionMap::value_type(mux, conn));
  61   }
  62 }
  63
  64 const ConnectionMap::iterator ConnectionList::getEnd()
  65 {
  66         return connections_.end();
  67 }
  68
  69 const ConnectionMap::iterator ConnectionList::getConnection(u_int16_t mux)
  70 {
  71         Lock lock(mutex_);
  72         ConnectionMap::iterator it = connections_.find(mux);
  73         return it;
  74 }
  75
  76
  77 ConnectionParam & ConnectionList::getOrNewConnectionUnlocked(u_int16_t mux)
  78 {
  79         ConnectionMap::iterator it = connections_.find(mux);
  80         if(it!=connections_.end())
  81                 return it->second;
  82
  83   uint8_t key[] = {
  84   'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
  85   'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p'
  86   };
  87
  88   uint8_t salt[] = {
  89   'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
  90   'i', 'j', 'k', 'l', 'm', 'n'
  91   };
  92
  93   SeqWindow * seq= new SeqWindow(0);
  94   seq_nr_t seq_nr_=0;
  95   KeyDerivation * kd = KeyDerivationFactory::create("aes-ctr"); // TODO: get value from options
  96   kd->init(Buffer(key, sizeof(key)), Buffer(salt, sizeof(salt)));
  97   ConnectionParam conn ( (*kd),  (*seq), seq_nr_, "",  0);
  98         connections_.insert(ConnectionMap::value_type(mux, conn));
  99         it = connections_.find(mux);
 100         return it->second;
 101 }
 102
 103 void ConnectionList::clear()
 104 {
 105   Lock lock(mutex_);
 106         connections_.clear();
 107 }
 108
 109 bool ConnectionList::empty()
 110 {
 111   Lock lock(mutex_);
 112         return connections_.empty();
 113 }
 114
 115 Mutex& ConnectionList::getMutex()
 116 {
 117   return mutex_;
 118 }