server.vala 7.92 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
/* 
 * 
 * Copyright (C) 2011 Colomban Wendling <ban@herbesfolles.org>
 *                    Jonathan Michalon <studios.chalmion@no-log.org>
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 * 
 */

21
using OVCC;
22 23
using OVCC.Network;

24 25
static const string TILES_FILE   = "tiles.xml";
static const string TILESET_FILE = "tileset.xml";
26 27

/* TODO: add a Source to be notified of incoming messages asynchronously */
28

29 30
public class Server: ThreadedSocketService
{
31
  private List<Client>  clients = null;
32
  private List<Game>    tables  = null;
33 34
  private TilesDef      tiles   = new TilesDef ();
  private TileSet       tileset = new TileSet ();
35 36
  private string        tiles_data;
  private string        tileset_data;
37
  
38 39 40
  public string name        { get; construct; }
  public uint   port        { get; construct; default = 0xdead; }
  public uint   max_tables  { get; set; default = 1; }
41 42 43
  
  public signal void stopped ();
  
44 45 46 47 48
  /* removes old tables */
  private void cleanup_tables ()
  {
    lock (tables) {
      foreach (var game in tables) {
49
        if (game.state != GameState.STOPPED && game.players.length() < 1) {
50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65
          tables.remove (game);
          debug ("Cleaned up table %p", game);
        }
      }
    }
  }
  
  /* get the most populated open table available, maybe creating one */
  private Game? pick_open_table ()
  {
    Game? candidate     = null;
    uint  n_open_tables = 0;
    
    lock (tables) {
      foreach (var game in tables) {
        if (game.state == GameState.STOPPED &&
66
            (candidate == null || candidate.players.length() < game.players.length())) {
67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
          candidate = game;
        }
        n_open_tables++;
      }
      /* if there is no open tables but room for more, create a new one */
      if (candidate == null && n_open_tables < max_tables) {
        candidate = new Game (tileset, null);
        tables.prepend (candidate);
        debug ("Added table %p", candidate);
      }
    }
    
    return candidate;
  }
  
82 83 84
  private bool send_all (Message      message,
                         Client?      exclude = null,
                         Cancellable? cancel = null)
85 86
    throws Error
  {
87 88 89 90 91 92 93 94
    lock (this.clients) {
      foreach (var c in this.clients) {
        if (c != exclude) {
          c.send (message, cancel);
        }
      }
    }
    return true;
95
  }
96 97

  private bool handle_login (LoginMessage msg, Client client)
98
    throws Error
99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135
  {
    bool ok = true;
    if (msg.status != LoginMessage.State.QUERY) {
      critical ("got LoginMessage with status different from QUERY");
      return false;
    }
    
    /* missing authentication check */
    if (msg.password == "") {
      debug ("rejecting auth as password is empty");
      msg.status = LoginMessage.State.MISSING_AUTHENTICATION;
      client.send (msg);
      return false;
    }

    /* already existing name check WARNING: lock needed */
    lock (this.clients) {
      foreach (Client c in this.clients) {
        if (c.login == msg.login) {
          ok = false;
          debug ("rejecting auth as login already connected");
          msg.status = LoginMessage.State.ALREADY_EXISTS;
          break;
        }
      }
      /* registration */
      if (ok) {
        debug ("accepting auth for %s", msg.login);
        msg.status = LoginMessage.State.OK;
        client.login    = msg.login;
        client.password = msg.password;
      }
    }
    client.send (msg);

    return ok;
  }
136 137

  private bool handle_join (JoinMessage msg, Client client)
138
    throws Error
139
  {
140
    /* FIXME handle precise table joins (not only -1/any) */
141 142 143
    Game? table = pick_open_table ();
    
    if (table == null) {
144 145 146
      var join = new JoinMessage (msg.table_index);
      join.status = JoinMessage.State.FAILED;
      client.send (join);
147 148 149
      return false;
    }
    
150 151 152 153 154
    debug ("Accepting table join");
    var join = new JoinMessage (msg.table_index);
    join.status = JoinMessage.State.OK;
    client.send (join);

155
    client.join (table);
156

157 158 159
    debug ("Sending game data");
    var data = new GamedataMessage (client.game.get_stack_ids(),
                                    client.game.get_player_nicks(),
160
                                    tiles_data, tileset_data);
161 162 163
    client.send (data);
    return true;
  }
164 165 166 167 168 169
  
  private bool handle_connection (ThreadedSocketService service,
                                  SocketConnection      connection,
                                  Object?               source)
  {
    debug ("New connection");
170
    var client = new Client ();
171
    try {
172 173 174 175
      client.connect (connection);
    } catch (Error e) {
      warning ("error connecting client: %s", e.message);
      return false;
176 177
    }
    
178 179 180 181 182 183 184 185 186 187 188
    lock (this.clients) {
      this.clients.prepend (client);
    }
    try {
      client.send (new WelcomeMessage ("Welcome to server %s".printf (this.name)));
    } catch {}
    
    var running = true;
    while (running) {
      Message? msg;
      
189
      try {
190
        msg = client.receive ();
191 192 193 194
      } catch (Error e) {
        warning ("error receiving data: %s", e.message);
        break;
      }
195 196 197 198 199 200 201 202 203 204 205
      
      if (msg == null) {
        debug ("Invalid message received");
        continue;
      }
      
      debug ("Message type %s received", msg.get_type ().name ());
      if (msg is StringMessage) {
        debug (" --- %s", (msg as StringMessage).message);
      }
      switch (msg.message_type) {
206
        case MessageType.LOGIN:
207
          debug ("Login for '%s' with '%s'", (msg as LoginMessage).login,
208
                                             (msg as LoginMessage).password);
209 210 211 212 213 214
          try {
            handle_login ((msg as LoginMessage), client);
          } catch (Error e) {
            /* FIXME send error message */
            warning ("Problems handling a client login... left in unknown state");
          }
215 216
          break;
        case MessageType.JOIN:
217 218 219 220 221 222
          try {
            handle_join (msg as JoinMessage, client);
          } catch (Error e) {
            /* FIXME send error message */
            warning ("Problems handling a client join... left in unknown state");
          }
223 224
          break;
        case MessageType.SIGNAL:
225
          client.signal_handle.emit_received (msg as SignalMessage);
226
          break;
227 228 229 230 231
        case MessageType.DISCONNECT: running = false; break;
      }
    }
    lock (this.clients) {
      this.clients.remove (client);
232
    }
233
    try { client.disconnect (); } catch { /* we don't care if disconnection failed */ }
234
    cleanup_tables ();
235 236 237 238 239 240 241
    debug ("Closed connection");
    return true;
  }
  
  construct
  {
    try {
242
      this.add_inet_port ((uint16) port, null);
243 244 245 246 247 248 249 250
    } catch (Error e) {
      critical ("failed to add address: %s", e.message);
    }
    this.run.connect (handle_connection);
  }
  
  public Server (string name,
                 uint16 port = 0xdead)
251
    throws Error
252
  {
253 254
    uint8[] data1;
    uint8[] data2;
255
    Object (name: name, port: port);
256

257 258 259 260 261 262 263 264 265 266 267
    File tiles_file   = Utils.lookup_resource_path(TILES_FILE);
    File tileset_file = Utils.lookup_resource_path(TILESET_FILE);

    tiles_file.load_contents(null, out data1, null);
    tileset_file.load_contents(null, out data2, null);

    tiles_data   = (string) data1;
    tileset_data = (string) data2;

    tiles.load_from_string (tiles_data);
    tileset.load_from_string (tiles, tileset_data);
268 269 270 271 272 273 274 275 276 277
  }
  
  /* a bit ugly since a direct call to parent method will not trigger the
   * :stopped signal */
  public new void stop ()
  {
    base.stop ();
    this.stopped ();
  }
}