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source: code/branches/tutoriallevel/src/libraries/network/WANDiscovery.cc @ 8498

Last change on this file since 8498 was 7801, checked in by dafrick, 14 years ago

Merging presentation2 branch back to trunk.

File size: 4.7 KB
Line 
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 *      Fabian 'x3n' Landau (original)
24 *   Co-authors:
25 *      Sandro 'smerkli' Merkli (adaptions to WAN)
26 *      ...
27 *
28 */
29
30#include "WANDiscovery.h"
31
32#include <enet/enet.h>
33#include <cstring>
34
35#include "util/ScopedSingletonManager.h"
36#include "core/CoreIncludes.h"
37
38
39namespace orxonox
40{
41  ManageScopedSingleton(WANDiscovery, ScopeID::Graphics, true);
42
43
44  WANDiscovery::WANDiscovery()
45  {
46    /* debugging output */
47    COUT(4) << "Creating WANDiscovery.\n";
48 
49    /* register object in orxonox */
50    RegisterObject(WANDiscovery);
51
52    /* check for the masterserver address option in orxonox.ini */
53    this->setConfigValues();
54
55    /* initialize it and see if it worked */
56    if( msc.initialize() )
57      COUT(2) << "Error: could not initialize master server communications!\n";
58
59    /* connect and see if it worked */
60    if( msc.connect( this->msaddress.c_str(), ORX_MSERVER_PORT ) )
61      COUT(2) << "Error: could not connect to master server at " 
62        << this->msaddress << std::endl;
63
64    /* debugging output */
65    COUT(4) << "Initialization of WANDiscovery complete.\n";
66  }
67
68  void WANDiscovery::setConfigValues()
69  {
70    /* update msaddress string from orxonox.ini config file, if it
71     * has changed.
72     */
73    SetConfigValue( msaddress, "orxonox.net");
74  } 
75
76  WANDiscovery::~WANDiscovery()
77  { 
78    /* clear server list */
79    this->servers_.clear(); 
80  }
81
82  /* callback for the network reply poller */
83  int rhandler( char *addr, ENetEvent *ev )
84  { 
85    /* error recognition */
86    if( !ev || !ev->packet || !ev->packet->data )
87    { COUT(2) << "Bad arguments received in WANDiscovery's reply handler.\n";
88      return 0;
89    }
90
91    /* handle incoming data */
92    /* if a list entry arrives add to list */
93    if( !strncmp( (char*)ev->packet->data, MSPROTO_SERVERLIST_ITEM,
94      MSPROTO_SERVERLIST_ITEM_LEN ) )
95    { 
96      /* create server structure from that item */
97      packet::ServerInformation toadd;
98
99      /* fill in data, -1 for the index: index should be length -1 */
100      toadd.setServerName( std::string((char*)ev->packet->data + 
101        MSPROTO_SERVERLIST_ITEM_LEN+1) );
102      toadd.setServerIP( std::string((char*)ev->packet->data + 
103        MSPROTO_SERVERLIST_ITEM_LEN+1) );
104
105      /* add to list */
106      WANDiscovery::getInstance().servers_.push_back( toadd );
107    }
108    else if( !strncmp( (char*)ev->packet->data, MSPROTO_SERVERLIST_END,
109      MSPROTO_SERVERLIST_END_LEN ) )
110    { 
111      /* this is the only case where 2 should be returned,
112       * as 1 is used to signal that we're done receiving
113       * the list
114       */
115      return 2; 
116    }
117
118    /* done handling, return all ok code 0 */
119    return 1;
120  }
121 
122  void WANDiscovery::discover()
123  {
124    /* clear list */
125    this->servers_.clear();
126
127    /* send request to server */
128    this->msc.sendRequest( MSPROTO_CLIENT " " MSPROTO_REQ_LIST );
129
130    /* poll for replies */
131    int i = WANDISC_MAXTRIES;
132    while( i > 0 )
133    {
134      /* poll for reply and act according to what was received */
135      switch( this->msc.pollForReply( rhandler, 500 ) )
136      { case 0: /* no event occured, decrease timeout */
137          --i; break;
138        case 1: /* got a list element, continue */ 
139          break;
140        case 2: /* done. */
141          i = 0; break;
142      }
143    }
144  }
145
146  std::string WANDiscovery::getServerListItemName(unsigned int index)
147  {
148    /* if the index is out of range, return empty */
149    if( index >= this->servers_.size() )
150      return BLANKSTRING;
151    else
152      /* else return the name of the server */
153      return this->servers_[index].getServerName();
154  }
155
156  std::string WANDiscovery::getServerListItemIP(unsigned int index)
157  {
158    /* if the index is out of range, return empty */
159    if( index >= this->servers_.size() )
160      return BLANKSTRING;
161    else
162      /* else return the IP of the server */
163      return this->servers_[index].getServerIP();
164  }
165
166
167} // namespace orxonox
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