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source: code/trunk/src/libraries/network/LANDiscovery.cc

Last change on this file was 12027, checked in by merholzl, 6 years ago

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1/*
2 *   ORXONOX - the hottest 3D action shooter ever to exist
3 *                    > www.orxonox.net <
4 *
5 *
6 *   License notice:
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 version 2
11 *   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 Street, Fifth Floor, Boston, MA  02110-1301, USA.
21 *
22 *   Author:
23 *      Oliver Scheuss
24 *   Co-authors:
25 *      ...
26 *
27 */
28
29#include "LANDiscovery.h"
30
31#include <enet/enet.h>
32#include <cstring>
33
34#include "core/CoreIncludes.h"
35#include "core/singleton/ScopedSingletonIncludes.h"
36
37
38namespace orxonox
39{
40  ManageScopedSingleton(LANDiscovery, ScopeID::GRAPHICS, false);
41
42  LANDiscovery::LANDiscovery()
43  {
44    this->host_ = enet_host_create(nullptr, 10, 0, 0, 0 );
45    if ( this->host_ == nullptr )
46        orxout(internal_error, context::network) << "LANDiscovery: host_ == nullptr" << endl;
47  }
48
49  LANDiscovery::~LANDiscovery()
50  {
51    if (this->host_ != nullptr)
52      enet_host_destroy(this->host_);
53  }
54
55  void LANDiscovery::discover()
56  {
57    this->servers_.clear();
58    ENetPeer* peer;
59    ENetAddress address;
60    memset(&address, 0, sizeof(ENetAddress));
61    address.port = LAN_DISCOVERY_PORT;
62
63    /* IPv4 */
64    address.host = ENET_HOST_BROADCAST;
65    peer = enet_host_connect(this->host_, &address, 0, 0);
66    if (peer == nullptr)
67        orxout(internal_error, context::network) << "Could not send LAN discovery to IPv4 Broadcast." << endl;
68
69    /* IPv6 */
70    enet_address_set_host(&address, "ff02::1"); // TODO: use a multicast group
71    peer = enet_host_connect(this->host_, &address, 0, 0);
72    if (peer == nullptr)
73        orxout(internal_error, context::network) << "Could not send LAN discovery to IPv6 Multicast." << endl;
74
75    ENetEvent event;
76    while( enet_host_service(this->host_, &event, 1000 ) )
77    {
78      switch( event.type )
79      {
80        case ENET_EVENT_TYPE_CONNECT:
81        {
82          orxout(verbose, context::network) << "Received LAN discovery connect from server " << event.peer->host->receivedAddress << endl;
83          ENetPacket* packet = enet_packet_create(LAN_DISCOVERY_MESSAGE, strlen(LAN_DISCOVERY_MESSAGE)+1, ENET_PACKET_FLAG_RELIABLE);
84          enet_peer_send(event.peer, 0, packet);
85          break;
86        }
87        case ENET_EVENT_TYPE_RECEIVE:
88          {
89            packet::ServerInformation info(&event);
90            std::string payload = info.getServerName();
91            info.setServerName(payload.substr(0,payload.length()-2));
92            info.setClientNumber( Ogre::StringConverter::parseInt(payload.substr(payload.length()-1)));
93            orxout(internal_info, context::network) << "Received LAN discovery server information; Name: " << info.getServerName() << ", Address: " << info.getServerIP() << ", Players: " << info.getClientNumber() << ", RTT: " << info.getServerRTT() << endl;
94            std::vector<packet::ServerInformation>::iterator it;
95            for( it=this->servers_.begin(); it!=this->servers_.end(); ++it )
96            {
97              if( (*it).getServerIP() == info.getServerIP() )
98                break;
99            }
100            if( it==this->servers_.end() )
101              this->servers_.push_back(info);
102          }
103          break;
104        default:
105          break;
106      }
107    }
108  }
109
110  std::string LANDiscovery::getServerListItemName(unsigned int index)
111  {
112    if( index >= this->servers_.size() )
113      return BLANKSTRING;
114    else
115      return this->servers_[index].getServerName();
116  }
117
118  std::string LANDiscovery::getServerListItemIP(unsigned int index)
119  {
120    if( index >= this->servers_.size() )
121      return BLANKSTRING;
122    else
123      return this->servers_[index].getServerIP();
124  }
125
126  std::string LANDiscovery::getServerListItemRTT(unsigned int index)
127  {
128    if( index >= this->servers_.size() )
129      return BLANKSTRING;
130    else{
131      uint32_t serverrtt = this->servers_[index].getServerRTT();
132      return Ogre::StringConverter::toString(serverrtt);
133    }
134  }
135
136  std::string LANDiscovery::getServerListItemPlayerNumber(unsigned int index)
137  {
138    if( index >= this->servers_.size() )
139      return BLANKSTRING;
140    else{
141      int playerNumber = this->servers_[index].getClientNumber();
142      return Ogre::StringConverter::toString(playerNumber);
143    }
144  }
145} // namespace orxonox
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