source: code/trunk/src/libraries/network/WANDiscovery.cc @ 10960

/*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *                    > www.orxonox.net <
 *
 *
 *   License notice:
 *
 *   This program 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 2
 *   of the License, or (at your option) any later version.
 *
 *   This program 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 this program; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *   Author:
 *      Sandro 'smerkli' Merkli
 *   Co-authors:
 *      Oliver Scheuss (original)
 *
 */

#include "WANDiscovery.h"

#include <enet/enet.h>
#include <cstring>

#include "core/CoreIncludes.h"


namespace orxonox
{
  RegisterAbstractClass(WANDiscovery).inheritsFrom<Configurable>();

  WANDiscovery::WANDiscovery()
  {
    /* debugging output */
    orxout(verbose, context::master_server) << "Creating WANDiscovery." << endl;

    /* register object in orxonox */
    RegisterObject(WANDiscovery);

    /* check for the masterserver address option in orxonox.ini */
    this->setConfigValues();

    /* initialize it and see if it worked */
    if( msc.initialize() )
      orxout(internal_error, context::master_server) << "Could not initialize master server communications!" << endl;

    /* connect and see if it worked */
    if( msc.connect( this->msaddress.c_str(), ORX_MSERVER_PORT ) )
      orxout(internal_error, context::master_server) << "Could not connect to master server at "
        << this->msaddress << endl;

    /* debugging output */
    orxout(verbose, context::master_server) << "Initialization of WANDiscovery complete." << endl;
  }

  void WANDiscovery::setConfigValues()
  {
    /* update msaddress string from orxonox.ini config file, if it
     * has changed.
     */
    SetConfigValue( msaddress, "master.orxonox.net");
  }

  WANDiscovery::~WANDiscovery()
  {
    /* clear server list */
    this->servers_.clear();
  }

  /* callback for the network reply poller */
  int WANDiscovery::rhandler( char *addr, ENetEvent *ev )
  {
    /* error recognition */
    if( !ev || !ev->packet || !ev->packet->data )
    { orxout(internal_warning, context::master_server) << "Bad arguments received in WANDiscovery's reply handler." << endl;
      return 0;
    }

    /* handle incoming data */
    /* if a list entry arrives add to list */
    if( !strncmp( (char*)ev->packet->data, MSPROTO_SERVERLIST_ITEM,
      MSPROTO_SERVERLIST_ITEM_LEN ) )
    {
      /* create server structure from that item */
      packet::ServerInformation toadd;

      /* fill in data, -1 for the index: index should be length -1 */
      std::string datastr = std::string((char*)ev->packet->data + MSPROTO_SERVERLIST_ITEM_LEN+1);
      int separator = datastr.find(" ");
      toadd.setServerIP(datastr.substr(0,separator));
      int secondsep = datastr.find(" ", separator + 1);
      toadd.setServerName(datastr.substr(separator + 1, secondsep - separator - 1));
      toadd.setClientNumber(Ogre::StringConverter::parseInt(datastr.substr(secondsep+1)));

      orxout(internal_info, context::network) << "Received WAN discovery server information; Name: " << toadd.getServerName() << ", Address: " << toadd.getServerIP() << ", Players: " << toadd.getClientNumber() << ", RTT: " << toadd.getServerRTT() << endl;

      /* add to list */
      this->servers_.push_back( toadd );
    }
    else if( !strncmp( (char*)ev->packet->data, MSPROTO_SERVERLIST_END,
      MSPROTO_SERVERLIST_END_LEN ) )
    {
      /* this is the only case where 2 should be returned,
       * as 1 is used to signal that we're done receiving
       * the list
       */
      return 2;
    }

    /* done handling, return all ok code 0 */
    return 1;
  }

  void WANDiscovery::discover()
  {
    /* clear list */
    this->servers_.clear();

    /* send request to server */
    this->msc.sendRequest( MSPROTO_CLIENT " " MSPROTO_REQ_LIST );

    /* poll for replies */
    int i = WANDISC_MAXTRIES;
    while( i > 0 )
    {
      /* poll for reply and act according to what was received */
      switch( this->msc.pollForReply( this, 500 ) )
      { case 0: /* no event occured, decrease timeout */
          --i; break;
        case 1: /* got a list element, continue */
          break;
        case 2: /* done. */
          i = 0; break;
      }
    }
  }

  std::string WANDiscovery::getServerListItemName(unsigned int index)
  {
    /* if the index is out of range, return empty */
    if( index >= this->servers_.size() )
      return BLANKSTRING;
    else
      /* else return the name of the server */
      return this->servers_[index].getServerName();
  }

  std::string WANDiscovery::getServerListItemIP(unsigned int index)
  {
    /* if the index is out of range, return empty */
    if( index >= this->servers_.size() )
      return BLANKSTRING;
    else
      /* else return the IP of the server */
      return this->servers_[index].getServerIP();
  }

  std::string WANDiscovery::getServerListItemRTT(unsigned int index)
  {
    if( index >= this->servers_.size() )
      return BLANKSTRING;
    else{
      uint32_t serverrtt = this->servers_[index].getServerRTT();
      return Ogre::StringConverter::toString(serverrtt);
    }

  }
  std::string WANDiscovery::getServerListItemPlayerNumber(unsigned int index)
  {
    if( index >= this->servers_.size() )
      return BLANKSTRING;
    else{
      int playerNumber = this->servers_[index].getClientNumber();
      return Ogre::StringConverter::toString(playerNumber);
    }
  }

} // namespace orxonox