/*
 *  anytun
 *
 *  The secure anycast tunneling protocol (satp) defines a protocol used
 *  for communication between any combination of unicast and anycast
 *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
 *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
 *  ethernet, ip, arp ...). satp directly includes cryptography and
 *  message authentication based on the methods used by SRTP.  It is
 *  intended to deliver a generic, scaleable and secure solution for
 *  tunneling and relaying of packets of any protocol.
 *
 *
 *  Copyright (C) 2007-2014 Markus Grüneis, Othmar Gsenger, Erwin Nindl,
 *                          Christian Pointner <satp@wirdorange.org>
 *
 *  This file is part of Anytun.
 *
 *  Anytun is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  Anytun is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Anytun.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  In addition, as a special exception, the copyright holders give
 *  permission to link the code of portions of this program with the
 *  OpenSSL library under certain conditions as described in each
 *  individual source file, and distribute linked combinations
 *  including the two.
 *  You must obey the GNU General Public License in all respects
 *  for all of the code used other than OpenSSL.  If you modify
 *  file(s) with this exception, you may extend this exception to your
 *  version of the file(s), but you are not obligated to do so.  If you
 *  do not wish to do so, delete this exception statement from your
 *  version.  If you delete this exception statement from all source
 *  files in the program, then also delete it here.
 */

#include "../threadUtils.hpp"
#include "../datatypes.h"

#include "rtpSessionTable.h"

RtpSessionTable* RtpSessionTable::inst = NULL;
Mutex RtpSessionTable::instMutex;
RtpSessionTable& gRtpSessionTable = RtpSessionTable::instance();


RtpSessionTable& RtpSessionTable::instance()
{
  Lock lock(instMutex);
  static instanceCleaner c;
  if(!inst) {
    inst = new RtpSessionTable();
  }

  return *inst;
}

RtpSessionTable::RtpSessionTable()
{
}

RtpSessionTable::~RtpSessionTable()
{
}

void RtpSessionTable::delSession(const std::string& call_id)
{
  Lock lock(mutex_);

  RtpSessionMap::iterator it = map_.find(call_id);
  if(it!=map_.end()) {
    delete it->second;
  }

  map_.erase(it);
}

RtpSession& RtpSessionTable::getOrNewSession(const std::string& call_id, bool& is_new)
{
  Lock lock(mutex_);
  return getOrNewSessionUnlocked(call_id, is_new);
}

RtpSession& RtpSessionTable::getOrNewSessionUnlocked(const std::string& call_id, bool& is_new)
{
  is_new = false;
  RtpSessionMap::iterator it = map_.find(call_id);
  if(it!=map_.end()) {
    return *(it->second);
  }

  is_new = true;
  std::pair<RtpSessionMap::iterator, bool> ret = map_.insert(RtpSessionMap::value_type(call_id, NULL));
  ret.first->second = new RtpSession(ret.first->first);
  return *(ret.first->second);
}

RtpSession& RtpSessionTable::getSession(const std::string& call_id)
{
  RtpSessionMap::iterator it = map_.find(call_id);
  if(it!=map_.end()) {
    return *(it->second);
  }

  throw std::runtime_error("session not found");
}

RtpSessionMap::iterator RtpSessionTable::getBeginUnlocked()
{
  return map_.begin();
}

RtpSessionMap::iterator RtpSessionTable::getEndUnlocked()
{
  return map_.end();
}

void RtpSessionTable::clear()
{
  Lock lock(mutex_);
  map_.clear();
}

bool RtpSessionTable::empty()
{
  Lock lock(mutex_);
  return map_.empty();
}

Mutex& RtpSessionTable::getMutex()
{
  return mutex_;
}