src/MultiPlayer/multiplaymgr.cxx

   1 //////////////////////////////////////////////////////////////////////
   2 //
   3 // multiplaymgr.hpp
   4 //
   5 // Written by Duncan McCreanor, started February 2003.
   6 // duncan.mccreanor@airservicesaustralia.com
   7 //
   8 // Copyright (C) 2003  Airservices Australia
   9 // Copyright (C) 2005  Oliver Schroeder
  10 // Copyright (C) 2006  Mathias Froehlich
  11 //
  12 // This program is free software; you can redistribute it and/or
  13 // modify it under the terms of the GNU General Public License as
  14 // published by the Free Software Foundation; either version 2 of the
  15 // License, or (at your option) any later version.
  16 //
  17 // This program is distributed in the hope that it will be useful, but
  18 // WITHOUT ANY WARRANTY; without even the implied warranty of
  19 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20 // General Public License for more details.
  21 //
  22 // You should have received a copy of the GNU General Public License
  23 // along with this program; if not, write to the Free Software
  24 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  25 //
  26 // $Id$
  27 //
  28 //////////////////////////////////////////////////////////////////////
  29
  30 #ifdef HAVE_CONFIG_H
  31 #include <config.h>
  32 #endif
  33
  34 #include <iostream>
  35 #include <algorithm>
  36 #include <cstring>
  37 #include <osg/Math>             // isNaN
  38 #include <plib/netSocket.h>
  39
  40 #include <simgear/misc/stdint.hxx>
  41 #include <simgear/timing/timestamp.hxx>
  42 #include <simgear/debug/logstream.hxx>
  43 #include <simgear/props/props.hxx>
  44
  45 #include <AIModel/AIManager.hxx>
  46 #include <Main/fg_props.hxx>
  47 #include "multiplaymgr.hxx"
  48 #include "mpmessages.hxx"
  49
  50 using namespace std;
  51
  52 #define MAX_PACKET_SIZE 1200
  53 #define MAX_TEXT_SIZE 128
  54
  55 // These constants are provided so that the ident
  56 // command can list file versions
  57 const char sMULTIPLAYMGR_BID[] = "$Id$";
  58 const char sMULTIPLAYMGR_HID[] = MULTIPLAYTXMGR_HID;
  59
  60 // A static map of protocol property id values to property paths,
  61 // This should be extendable dynamically for every specific aircraft ...
  62 // For now only that static list
  63 FGMultiplayMgr::IdPropertyList
  64 const FGMultiplayMgr::sIdPropertyList[] = {
  65   {100, "surface-positions/left-aileron-pos-norm",  SGPropertyNode::FLOAT},
  66   {101, "surface-positions/right-aileron-pos-norm", SGPropertyNode::FLOAT},
  67   {102, "surface-positions/elevator-pos-norm",      SGPropertyNode::FLOAT},
  68   {103, "surface-positions/rudder-pos-norm",        SGPropertyNode::FLOAT},
  69   {104, "surface-positions/flap-pos-norm",          SGPropertyNode::FLOAT},
  70   {105, "surface-positions/speedbrake-pos-norm",    SGPropertyNode::FLOAT},
  71   {106, "gear/tailhook/position-norm",              SGPropertyNode::FLOAT},
  72   {107, "gear/launchbar/position-norm",             SGPropertyNode::FLOAT},
  73   {108, "gear/launchbar/state",                     SGPropertyNode::STRING},
  74   {109, "gear/launchbar/holdback-position-norm",    SGPropertyNode::FLOAT},
  75   {110, "canopy/position-norm",                     SGPropertyNode::FLOAT},
  76   {111, "surface-positions/wing-pos-norm",          SGPropertyNode::FLOAT},
  77   {112, "surface-positions/wing-fold-pos-norm",     SGPropertyNode::FLOAT},
  78
  79   {200, "gear/gear[0]/compression-norm",           SGPropertyNode::FLOAT},
  80   {201, "gear/gear[0]/position-norm",              SGPropertyNode::FLOAT},
  81   {210, "gear/gear[1]/compression-norm",           SGPropertyNode::FLOAT},
  82   {211, "gear/gear[1]/position-norm",              SGPropertyNode::FLOAT},
  83   {220, "gear/gear[2]/compression-norm",           SGPropertyNode::FLOAT},
  84   {221, "gear/gear[2]/position-norm",              SGPropertyNode::FLOAT},
  85   {230, "gear/gear[3]/compression-norm",           SGPropertyNode::FLOAT},
  86   {231, "gear/gear[3]/position-norm",              SGPropertyNode::FLOAT},
  87   {240, "gear/gear[4]/compression-norm",           SGPropertyNode::FLOAT},
  88   {241, "gear/gear[4]/position-norm",              SGPropertyNode::FLOAT},
  89
  90   {300, "engines/engine[0]/n1",  SGPropertyNode::FLOAT},
  91   {301, "engines/engine[0]/n2",  SGPropertyNode::FLOAT},
  92   {302, "engines/engine[0]/rpm", SGPropertyNode::FLOAT},
  93   {310, "engines/engine[1]/n1",  SGPropertyNode::FLOAT},
  94   {311, "engines/engine[1]/n2",  SGPropertyNode::FLOAT},
  95   {312, "engines/engine[1]/rpm", SGPropertyNode::FLOAT},
  96   {320, "engines/engine[2]/n1",  SGPropertyNode::FLOAT},
  97   {321, "engines/engine[2]/n2",  SGPropertyNode::FLOAT},
  98   {322, "engines/engine[2]/rpm", SGPropertyNode::FLOAT},
  99   {330, "engines/engine[3]/n1",  SGPropertyNode::FLOAT},
 100   {331, "engines/engine[3]/n2",  SGPropertyNode::FLOAT},
 101   {332, "engines/engine[3]/rpm", SGPropertyNode::FLOAT},
 102   {340, "engines/engine[4]/n1",  SGPropertyNode::FLOAT},
 103   {341, "engines/engine[4]/n2",  SGPropertyNode::FLOAT},
 104   {342, "engines/engine[4]/rpm", SGPropertyNode::FLOAT},
 105   {350, "engines/engine[5]/n1",  SGPropertyNode::FLOAT},
 106   {351, "engines/engine[5]/n2",  SGPropertyNode::FLOAT},
 107   {352, "engines/engine[5]/rpm", SGPropertyNode::FLOAT},
 108   {360, "engines/engine[6]/n1",  SGPropertyNode::FLOAT},
 109   {361, "engines/engine[6]/n2",  SGPropertyNode::FLOAT},
 110   {362, "engines/engine[6]/rpm", SGPropertyNode::FLOAT},
 111   {370, "engines/engine[7]/n1",  SGPropertyNode::FLOAT},
 112   {371, "engines/engine[7]/n2",  SGPropertyNode::FLOAT},
 113   {372, "engines/engine[7]/rpm", SGPropertyNode::FLOAT},
 114   {380, "engines/engine[8]/n1",  SGPropertyNode::FLOAT},
 115   {381, "engines/engine[8]/n2",  SGPropertyNode::FLOAT},
 116   {382, "engines/engine[8]/rpm", SGPropertyNode::FLOAT},
 117   {390, "engines/engine[9]/n1",  SGPropertyNode::FLOAT},
 118   {391, "engines/engine[9]/n2",  SGPropertyNode::FLOAT},
 119   {392, "engines/engine[9]/rpm", SGPropertyNode::FLOAT},
 120
 121   {800, "rotors/main/rpm", SGPropertyNode::FLOAT},
 122   {801, "rotors/tail/rpm", SGPropertyNode::FLOAT},
 123   {810, "rotors/main/blade[0]/position-deg",  SGPropertyNode::FLOAT},
 124   {811, "rotors/main/blade[1]/position-deg",  SGPropertyNode::FLOAT},
 125   {812, "rotors/main/blade[2]/position-deg",  SGPropertyNode::FLOAT},
 126   {813, "rotors/main/blade[3]/position-deg",  SGPropertyNode::FLOAT},
 127   {820, "rotors/main/blade[0]/flap-deg",  SGPropertyNode::FLOAT},
 128   {821, "rotors/main/blade[1]/flap-deg",  SGPropertyNode::FLOAT},
 129   {822, "rotors/main/blade[2]/flap-deg",  SGPropertyNode::FLOAT},
 130   {823, "rotors/main/blade[3]/flap-deg",  SGPropertyNode::FLOAT},
 131   {830, "rotors/tail/blade[0]/position-deg",  SGPropertyNode::FLOAT},
 132   {831, "rotors/tail/blade[1]/position-deg",  SGPropertyNode::FLOAT},
 133
 134   {900, "sim/hitches/aerotow/tow/length",                       SGPropertyNode::FLOAT},
 135   {901, "sim/hitches/aerotow/tow/elastic-constant",             SGPropertyNode::FLOAT},
 136   {902, "sim/hitches/aerotow/tow/weight-per-m-kg-m",            SGPropertyNode::FLOAT},
 137   {903, "sim/hitches/aerotow/tow/dist",                         SGPropertyNode::FLOAT},
 138   {904, "sim/hitches/aerotow/tow/connected-to-property-node",   SGPropertyNode::BOOL},
 139   {905, "sim/hitches/aerotow/tow/connected-to-ai-or-mp-callsign",   SGPropertyNode::STRING},
 140   {906, "sim/hitches/aerotow/tow/brake-force",                  SGPropertyNode::FLOAT},
 141   {907, "sim/hitches/aerotow/tow/end-force-x",                  SGPropertyNode::FLOAT},
 142   {908, "sim/hitches/aerotow/tow/end-force-y",                  SGPropertyNode::FLOAT},
 143   {909, "sim/hitches/aerotow/tow/end-force-z",                  SGPropertyNode::FLOAT},
 144   {930, "sim/hitches/aerotow/is-slave",                         SGPropertyNode::BOOL},
 145   {931, "sim/hitches/aerotow/speed-in-tow-direction",           SGPropertyNode::FLOAT},
 146   {932, "sim/hitches/aerotow/open",                             SGPropertyNode::BOOL},
 147   {933, "sim/hitches/aerotow/local-pos-x",                      SGPropertyNode::FLOAT},
 148   {934, "sim/hitches/aerotow/local-pos-y",                      SGPropertyNode::FLOAT},
 149   {935, "sim/hitches/aerotow/local-pos-z",                      SGPropertyNode::FLOAT},
 150
 151   {1001, "controls/flight/slats",  SGPropertyNode::FLOAT},
 152   {1002, "controls/flight/speedbrake",  SGPropertyNode::FLOAT},
 153   {1003, "controls/flight/spoilers",  SGPropertyNode::FLOAT},
 154   {1004, "controls/gear/gear-down",  SGPropertyNode::FLOAT},
 155   {1005, "controls/lighting/nav-lights",  SGPropertyNode::FLOAT},
 156   {1006, "controls/armament/station[0]/jettison-all",  SGPropertyNode::BOOL},
 157
 158   {1100, "sim/model/variant", SGPropertyNode::INT},
 159   {1101, "sim/model/livery/file", SGPropertyNode::STRING},
 160
 161   {1200, "environment/wildfire/data", SGPropertyNode::STRING},
 162
 163   {10001, "sim/multiplay/transmission-freq-hz",  SGPropertyNode::STRING},
 164   {10002, "sim/multiplay/chat",  SGPropertyNode::STRING},
 165
 166   {10100, "sim/multiplay/generic/string[0]", SGPropertyNode::STRING},
 167   {10101, "sim/multiplay/generic/string[1]", SGPropertyNode::STRING},
 168   {10102, "sim/multiplay/generic/string[2]", SGPropertyNode::STRING},
 169   {10103, "sim/multiplay/generic/string[3]", SGPropertyNode::STRING},
 170   {10104, "sim/multiplay/generic/string[4]", SGPropertyNode::STRING},
 171   {10105, "sim/multiplay/generic/string[5]", SGPropertyNode::STRING},
 172   {10106, "sim/multiplay/generic/string[6]", SGPropertyNode::STRING},
 173   {10107, "sim/multiplay/generic/string[7]", SGPropertyNode::STRING},
 174   {10108, "sim/multiplay/generic/string[8]", SGPropertyNode::STRING},
 175   {10109, "sim/multiplay/generic/string[9]", SGPropertyNode::STRING},
 176   {10110, "sim/multiplay/generic/string[10]", SGPropertyNode::STRING},
 177   {10111, "sim/multiplay/generic/string[11]", SGPropertyNode::STRING},
 178   {10112, "sim/multiplay/generic/string[12]", SGPropertyNode::STRING},
 179   {10113, "sim/multiplay/generic/string[13]", SGPropertyNode::STRING},
 180   {10114, "sim/multiplay/generic/string[14]", SGPropertyNode::STRING},
 181   {10115, "sim/multiplay/generic/string[15]", SGPropertyNode::STRING},
 182   {10116, "sim/multiplay/generic/string[16]", SGPropertyNode::STRING},
 183   {10117, "sim/multiplay/generic/string[17]", SGPropertyNode::STRING},
 184   {10118, "sim/multiplay/generic/string[18]", SGPropertyNode::STRING},
 185   {10119, "sim/multiplay/generic/string[19]", SGPropertyNode::STRING},
 186
 187   {10200, "sim/multiplay/generic/float[0]", SGPropertyNode::FLOAT},
 188   {10201, "sim/multiplay/generic/float[1]", SGPropertyNode::FLOAT},
 189   {10202, "sim/multiplay/generic/float[2]", SGPropertyNode::FLOAT},
 190   {10203, "sim/multiplay/generic/float[3]", SGPropertyNode::FLOAT},
 191   {10204, "sim/multiplay/generic/float[4]", SGPropertyNode::FLOAT},
 192   {10205, "sim/multiplay/generic/float[5]", SGPropertyNode::FLOAT},
 193   {10206, "sim/multiplay/generic/float[6]", SGPropertyNode::FLOAT},
 194   {10207, "sim/multiplay/generic/float[7]", SGPropertyNode::FLOAT},
 195   {10208, "sim/multiplay/generic/float[8]", SGPropertyNode::FLOAT},
 196   {10209, "sim/multiplay/generic/float[9]", SGPropertyNode::FLOAT},
 197   {10210, "sim/multiplay/generic/float[10]", SGPropertyNode::FLOAT},
 198   {10211, "sim/multiplay/generic/float[11]", SGPropertyNode::FLOAT},
 199   {10212, "sim/multiplay/generic/float[12]", SGPropertyNode::FLOAT},
 200   {10213, "sim/multiplay/generic/float[13]", SGPropertyNode::FLOAT},
 201   {10214, "sim/multiplay/generic/float[14]", SGPropertyNode::FLOAT},
 202   {10215, "sim/multiplay/generic/float[15]", SGPropertyNode::FLOAT},
 203   {10216, "sim/multiplay/generic/float[16]", SGPropertyNode::FLOAT},
 204   {10217, "sim/multiplay/generic/float[17]", SGPropertyNode::FLOAT},
 205   {10218, "sim/multiplay/generic/float[18]", SGPropertyNode::FLOAT},
 206   {10219, "sim/multiplay/generic/float[19]", SGPropertyNode::FLOAT},
 207
 208   {10300, "sim/multiplay/generic/int[0]", SGPropertyNode::INT},
 209   {10301, "sim/multiplay/generic/int[1]", SGPropertyNode::INT},
 210   {10302, "sim/multiplay/generic/int[2]", SGPropertyNode::INT},
 211   {10303, "sim/multiplay/generic/int[3]", SGPropertyNode::INT},
 212   {10304, "sim/multiplay/generic/int[4]", SGPropertyNode::INT},
 213   {10305, "sim/multiplay/generic/int[5]", SGPropertyNode::INT},
 214   {10306, "sim/multiplay/generic/int[6]", SGPropertyNode::INT},
 215   {10307, "sim/multiplay/generic/int[7]", SGPropertyNode::INT},
 216   {10308, "sim/multiplay/generic/int[8]", SGPropertyNode::INT},
 217   {10309, "sim/multiplay/generic/int[9]", SGPropertyNode::INT},
 218   {10310, "sim/multiplay/generic/int[10]", SGPropertyNode::INT},
 219   {10311, "sim/multiplay/generic/int[11]", SGPropertyNode::INT},
 220   {10312, "sim/multiplay/generic/int[12]", SGPropertyNode::INT},
 221   {10313, "sim/multiplay/generic/int[13]", SGPropertyNode::INT},
 222   {10314, "sim/multiplay/generic/int[14]", SGPropertyNode::INT},
 223   {10315, "sim/multiplay/generic/int[15]", SGPropertyNode::INT},
 224   {10316, "sim/multiplay/generic/int[16]", SGPropertyNode::INT},
 225   {10317, "sim/multiplay/generic/int[17]", SGPropertyNode::INT},
 226   {10318, "sim/multiplay/generic/int[18]", SGPropertyNode::INT},
 227   {10319, "sim/multiplay/generic/int[19]", SGPropertyNode::INT},
 228 };
 229
 230 const unsigned
 231 FGMultiplayMgr::numProperties = (sizeof(FGMultiplayMgr::sIdPropertyList)
 232                                  / sizeof(FGMultiplayMgr::sIdPropertyList[0]));
 233
 234 // Look up a property ID using binary search.
 235 namespace
 236 {
 237   struct ComparePropertyId
 238   {
 239     bool operator()(const FGMultiplayMgr::IdPropertyList& lhs,
 240                     const FGMultiplayMgr::IdPropertyList& rhs)
 241     {
 242       return lhs.id < rhs.id;
 243     }
 244     bool operator()(const FGMultiplayMgr::IdPropertyList& lhs,
 245                     unsigned id)
 246     {
 247       return lhs.id < id;
 248     }
 249     bool operator()(unsigned id,
 250                     const FGMultiplayMgr::IdPropertyList& rhs)
 251     {
 252       return id < rhs.id;
 253     }
 254   };
 255
 256 }
 257 const FGMultiplayMgr::IdPropertyList* FGMultiplayMgr::findProperty(unsigned id)
 258 {
 259   std::pair<const IdPropertyList*, const IdPropertyList*> result
 260     = std::equal_range(sIdPropertyList, sIdPropertyList + numProperties, id,
 261                        ComparePropertyId());
 262   if (result.first == result.second) {
 263     return 0;
 264   } else {
 265     return result.first;
 266   }
 267 }
 268
 269 namespace
 270 {
 271   bool verifyProperties(const xdr_data_t* data, const xdr_data_t* end)
 272   {
 273     const xdr_data_t* xdr = data;
 274     while (xdr < end) {
 275       unsigned id = XDR_decode_uint32(*xdr);
 276       const FGMultiplayMgr::IdPropertyList* plist
 277         = FGMultiplayMgr::findProperty(id);
 278
 279       if (plist) {
 280         xdr++;
 281         // How we decode the remainder of the property depends on the type
 282         switch (plist->type) {
 283         case SGPropertyNode::INT:
 284         case SGPropertyNode::BOOL:
 285         case SGPropertyNode::LONG:
 286           xdr++;
 287           break;
 288         case SGPropertyNode::FLOAT:
 289         case SGPropertyNode::DOUBLE:
 290           {
 291             float val = XDR_decode_float(*xdr);
 292             if (osg::isNaN(val))
 293               return false;
 294             xdr++;
 295             break;
 296           }
 297         case SGPropertyNode::STRING:
 298         case SGPropertyNode::UNSPECIFIED:
 299           {
 300             // String is complicated. It consists of
 301             // The length of the string
 302             // The string itself
 303             // Padding to the nearest 4-bytes.
 304             // XXX Yes, each byte is padded out to a word! Too late
 305             // to change...
 306             uint32_t length = XDR_decode_uint32(*xdr);
 307             xdr++;
 308             // Old versions truncated the string but left the length
 309             // unadjusted.
 310             if (length > MAX_TEXT_SIZE)
 311               length = MAX_TEXT_SIZE;
 312             xdr += length;
 313             // Now handle the padding
 314             while ((length % 4) != 0)
 315               {
 316                 xdr++;
 317                 length++;
 318                 //cout << "0";
 319               }
 320           }
 321           break;
 322         default:
 323           // cerr << "Unknown Prop type " << id << " " << type << "\n";
 324           xdr++;
 325           break;
 326         }
 327       }
 328       else {
 329         // give up; this is a malformed property list.
 330         return false;
 331       }
 332     }
 333     return true;
 334   }
 335 }
 336 //////////////////////////////////////////////////////////////////////
 337 //
 338 //  MultiplayMgr constructor
 339 //
 340 //////////////////////////////////////////////////////////////////////
 341 FGMultiplayMgr::FGMultiplayMgr()
 342 {
 343   mSocket        = 0;
 344   mInitialised   = false;
 345   mHaveServer    = false;
 346 } // FGMultiplayMgr::FGMultiplayMgr()
 347 //////////////////////////////////////////////////////////////////////
 348
 349 //////////////////////////////////////////////////////////////////////
 350 //
 351 //  MultiplayMgr destructor
 352 //
 353 //////////////////////////////////////////////////////////////////////
 354 FGMultiplayMgr::~FGMultiplayMgr()
 355 {
 356   Close();
 357 } // FGMultiplayMgr::~FGMultiplayMgr()
 358 //////////////////////////////////////////////////////////////////////
 359
 360 //////////////////////////////////////////////////////////////////////
 361 //
 362 //  Initialise object
 363 //
 364 //////////////////////////////////////////////////////////////////////
 365 bool
 366 FGMultiplayMgr::init (void)
 367 {
 368   //////////////////////////////////////////////////
 369   //  Initialise object if not already done
 370   //////////////////////////////////////////////////
 371   if (mInitialised) {
 372     SG_LOG(SG_NETWORK, SG_WARN, "FGMultiplayMgr::init - already initialised");
 373     return false;
 374   }
 375   //////////////////////////////////////////////////
 376   //  Set members from property values
 377   //////////////////////////////////////////////////
 378   short rxPort = fgGetInt("/sim/multiplay/rxport");
 379   string rxAddress = fgGetString("/sim/multiplay/rxhost");
 380   short txPort = fgGetInt("/sim/multiplay/txport");
 381   string txAddress = fgGetString("/sim/multiplay/txhost");
 382   mCallsign = fgGetString("/sim/multiplay/callsign");
 383   if (txPort > 0 && !txAddress.empty()) {
 384     mServer.set(txAddress.c_str(), txPort);
 385     if (strncmp (mServer.getHost(), "0.0.0.0", 8) == 0) {
 386       mHaveServer = false;
 387       SG_LOG(SG_NETWORK, SG_ALERT,
 388         "FGMultiplayMgr - could not resolve '"
 389         << txAddress << "', Multiplayermode disabled");
 390     } else {
 391       mHaveServer = true;
 392     }
 393     if (rxPort <= 0)
 394       rxPort = txPort;
 395   }
 396   if (rxPort <= 0) {
 397     SG_LOG(SG_NETWORK, SG_ALERT,
 398       "FGMultiplayMgr - No receiver port, Multiplayermode disabled");
 399     return (false);
 400   }
 401   if (mCallsign.empty())
 402     mCallsign = "JohnDoe"; // FIXME: use getpwuid
 403   SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-txaddress= "<<txAddress);
 404   SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-txport= "<<txPort );
 405   SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-rxaddress="<<rxAddress );
 406   SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-rxport= "<<rxPort);
 407   SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-callsign= "<<mCallsign);
 408   Close(); // Should Init be called twice, close Socket first
 409            // A memory leak was reported here by valgrind
 410   mSocket = new netSocket();
 411   if (!mSocket->open(false)) {
 412     SG_LOG( SG_NETWORK, SG_ALERT,
 413             "FGMultiplayMgr::init - Failed to create data socket" );
 414     return false;
 415   }
 416   mSocket->setBlocking(false);
 417   if (mSocket->bind(rxAddress.c_str(), rxPort) != 0) {
 418     perror("bind");
 419     SG_LOG( SG_NETWORK, SG_ALERT,
 420             "FGMultiplayMgr::Open - Failed to bind receive socket" );
 421     return false;
 422   }
 423   mInitialised = true;
 424   return true;
 425 } // FGMultiplayMgr::init()
 426 //////////////////////////////////////////////////////////////////////
 427
 428 //////////////////////////////////////////////////////////////////////
 429 //
 430 //  Closes and deletes the local player object. Closes
 431 //  and deletes the tx socket. Resets the object state to unitialised.
 432 //
 433 //////////////////////////////////////////////////////////////////////
 434 void
 435 FGMultiplayMgr::Close (void)
 436 {
 437   mMultiPlayerMap.clear();
 438
 439   if (mSocket) {
 440     mSocket->close();
 441     delete mSocket;
 442     mSocket = 0;
 443   }
 444   mInitialised = false;
 445 } // FGMultiplayMgr::Close(void)
 446 //////////////////////////////////////////////////////////////////////
 447
 448 //////////////////////////////////////////////////////////////////////
 449 //
 450 //  Description: Sends the position data for the local position.
 451 //
 452 //////////////////////////////////////////////////////////////////////
 453
 454 /**
 455  * The buffer that holds a multi-player message, suitably aligned.
 456  */
 457 union FGMultiplayMgr::MsgBuf
 458 {
 459     MsgBuf()
 460     {
 461         memset(&Msg, 0, sizeof(Msg));
 462     }
 463
 464     T_MsgHdr* msgHdr()
 465     {
 466         return reinterpret_cast<T_MsgHdr*>(Msg);
 467     }
 468
 469     const T_MsgHdr* msgHdr() const
 470     {
 471         return reinterpret_cast<const T_MsgHdr*>(Msg);
 472     }
 473
 474     T_PositionMsg* posMsg()
 475     {
 476         return reinterpret_cast<T_PositionMsg*>(Msg + sizeof(T_MsgHdr));
 477     }
 478
 479     const T_PositionMsg* posMsg() const
 480     {
 481         return reinterpret_cast<const T_PositionMsg*>(Msg + sizeof(T_MsgHdr));
 482     }
 483
 484     xdr_data_t* properties()
 485     {
 486         return reinterpret_cast<xdr_data_t*>(Msg + sizeof(T_MsgHdr)
 487                                              + sizeof(T_PositionMsg));
 488     }
 489
 490     const xdr_data_t* properties() const
 491     {
 492         return reinterpret_cast<const xdr_data_t*>(Msg + sizeof(T_MsgHdr)
 493                                                    + sizeof(T_PositionMsg));
 494     }
 495     /**
 496      * The end of the properties buffer.
 497      */
 498     xdr_data_t* propsEnd()
 499     {
 500         return reinterpret_cast<xdr_data_t*>(Msg + MAX_PACKET_SIZE);
 501     };
 502
 503     const xdr_data_t* propsEnd() const
 504     {
 505         return reinterpret_cast<const xdr_data_t*>(Msg + MAX_PACKET_SIZE);
 506     };
 507     /**
 508      * The end of properties actually in the buffer. This assumes that
 509      * the message header is valid.
 510      */
 511     xdr_data_t* propsRecvdEnd()
 512     {
 513         return reinterpret_cast<xdr_data_t*>(Msg + msgHdr()->MsgLen);
 514     }
 515
 516     const xdr_data_t* propsRecvdEnd() const
 517     {
 518         return reinterpret_cast<const xdr_data_t*>(Msg + msgHdr()->MsgLen);
 519     }
 520
 521     xdr_data2_t double_val;
 522     char Msg[MAX_PACKET_SIZE];
 523 };
 524
 525 void
 526 FGMultiplayMgr::SendMyPosition(const FGExternalMotionData& motionInfo)
 527 {
 528   if ((! mInitialised) || (! mHaveServer))
 529         return;
 530   if (! mHaveServer) {
 531     SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::SendMyPosition - no server");
 532     return;
 533   }
 534
 535   MsgBuf msgBuf;
 536   T_PositionMsg* PosMsg = msgBuf.posMsg();
 537
 538   strncpy(PosMsg->Model, fgGetString("/sim/model/path"), MAX_MODEL_NAME_LEN);
 539   PosMsg->Model[MAX_MODEL_NAME_LEN - 1] = '\0';
 540
 541   PosMsg->time = XDR_encode_double (motionInfo.time);
 542   PosMsg->lag = XDR_encode_double (motionInfo.lag);
 543   for (unsigned i = 0 ; i < 3; ++i)
 544     PosMsg->position[i] = XDR_encode_double (motionInfo.position(i));
 545   SGVec3f angleAxis;
 546   motionInfo.orientation.getAngleAxis(angleAxis);
 547   for (unsigned i = 0 ; i < 3; ++i)
 548     PosMsg->orientation[i] = XDR_encode_float (angleAxis(i));
 549   for (unsigned i = 0 ; i < 3; ++i)
 550     PosMsg->linearVel[i] = XDR_encode_float (motionInfo.linearVel(i));
 551   for (unsigned i = 0 ; i < 3; ++i)
 552     PosMsg->angularVel[i] = XDR_encode_float (motionInfo.angularVel(i));
 553   for (unsigned i = 0 ; i < 3; ++i)
 554     PosMsg->linearAccel[i] = XDR_encode_float (motionInfo.linearAccel(i));
 555   for (unsigned i = 0 ; i < 3; ++i)
 556     PosMsg->angularAccel[i] = XDR_encode_float (motionInfo.angularAccel(i));
 557
 558   xdr_data_t* ptr = msgBuf.properties();
 559   std::vector<FGPropertyData*>::const_iterator it;
 560   it = motionInfo.properties.begin();
 561   //cout << "OUTPUT PROPERTIES\n";
 562   xdr_data_t* msgEnd = msgBuf.propsEnd();
 563   while (it != motionInfo.properties.end() && ptr + 2 < msgEnd) {
 564
 565     // First element is the ID. Write it out when we know we have room for
 566     // the whole property.
 567     xdr_data_t id =  XDR_encode_uint32((*it)->id);
 568     // The actual data representation depends on the type
 569     switch ((*it)->type) {
 570       case SGPropertyNode::INT:
 571       case SGPropertyNode::BOOL:
 572       case SGPropertyNode::LONG:
 573         *ptr++ = id;
 574         *ptr++ = XDR_encode_uint32((*it)->int_value);
 575         //cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->int_value << "\n";
 576         break;
 577       case SGPropertyNode::FLOAT:
 578       case SGPropertyNode::DOUBLE:
 579         *ptr++ = id;
 580         *ptr++ = XDR_encode_float((*it)->float_value);
 581         //cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->float_value << "\n";
 582         break;
 583       case SGPropertyNode::STRING:
 584       case SGPropertyNode::UNSPECIFIED:
 585         {
 586           // String is complicated. It consists of
 587           // The length of the string
 588           // The string itself
 589           // Padding to the nearest 4-bytes.
 590           const char* lcharptr = (*it)->string_value;
 591
 592           if (lcharptr != 0)
 593           {
 594             // Add the length
 595             ////cout << "String length: " << strlen(lcharptr) << "\n";
 596             uint32_t len = strlen(lcharptr);
 597             if (len > MAX_TEXT_SIZE)
 598               len = MAX_TEXT_SIZE;
 599             // XXX This should not be using 4 bytes per character!
 600             // If there's not enough room for this property, drop it
 601             // on the floor.
 602             if (ptr + 2 + ((len + 3) & ~3) > msgEnd)
 603                 goto escape;
 604             //cout << "String length unint32: " << len << "\n";
 605             *ptr++ = id;
 606             *ptr++ = XDR_encode_uint32(len);
 607             if (len != 0)
 608             {
 609               // Now the text itself
 610               // XXX This should not be using 4 bytes per character!
 611               int lcount = 0;
 612               while ((*lcharptr != '\0') && (lcount < MAX_TEXT_SIZE))
 613               {
 614                 *ptr++ = XDR_encode_int8(*lcharptr);
 615                 lcharptr++;
 616                 lcount++;
 617               }
 618
 619               //cout << "Prop:" << (*it)->id << " " << (*it)->type << " " << len << " " << (*it)->string_value;
 620
 621               // Now pad if required
 622               while ((lcount % 4) != 0)
 623               {
 624                 *ptr++ = XDR_encode_int8(0);
 625                 lcount++;
 626                 //cout << "0";
 627               }
 628
 629               //cout << "\n";
 630             }
 631           }
 632           else
 633           {
 634             // Nothing to encode
 635             *ptr++ = id;
 636             *ptr++ = XDR_encode_uint32(0);
 637             //cout << "Prop:" << (*it)->id << " " << (*it)->type << " 0\n";
 638           }
 639         }
 640         break;
 641
 642       default:
 643         //cout << " Unknown Type: " << (*it)->type << "\n";
 644         *ptr++ = id;
 645         *ptr++ = XDR_encode_float((*it)->float_value);;
 646         //cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->float_value << "\n";
 647         break;
 648     }
 649
 650     ++it;
 651   }
 652 escape:
 653   unsigned msgLen = reinterpret_cast<char*>(ptr) - msgBuf.Msg;
 654   FillMsgHdr(msgBuf.msgHdr(), POS_DATA_ID, msgLen);
 655   mSocket->sendto(msgBuf.Msg, msgLen, 0, &mServer);
 656   SG_LOG(SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::SendMyPosition");
 657 } // FGMultiplayMgr::SendMyPosition()
 658
 659 //////////////////////////////////////////////////////////////////////
 660
 661 //////////////////////////////////////////////////////////////////////
 662 //
 663 //  Name: SendTextMessage
 664 //  Description: Sends a message to the player. The message must
 665 //  contain a valid and correctly filled out header and optional
 666 //  message body.
 667 //
 668 //////////////////////////////////////////////////////////////////////
 669 void
 670 FGMultiplayMgr::SendTextMessage(const string &MsgText)
 671 {
 672   if (!mInitialised || !mHaveServer)
 673     return;
 674
 675   T_MsgHdr MsgHdr;
 676   FillMsgHdr(&MsgHdr, CHAT_MSG_ID);
 677   //////////////////////////////////////////////////
 678   // Divide the text string into blocks that fit
 679   // in the message and send the blocks.
 680   //////////////////////////////////////////////////
 681   unsigned iNextBlockPosition = 0;
 682   T_ChatMsg ChatMsg;
 683
 684   char Msg[sizeof(T_MsgHdr) + sizeof(T_ChatMsg)];
 685   while (iNextBlockPosition < MsgText.length()) {
 686     strncpy (ChatMsg.Text,
 687              MsgText.substr(iNextBlockPosition, MAX_CHAT_MSG_LEN - 1).c_str(),
 688              MAX_CHAT_MSG_LEN);
 689     ChatMsg.Text[MAX_CHAT_MSG_LEN - 1] = '\0';
 690     memcpy (Msg, &MsgHdr, sizeof(T_MsgHdr));
 691     memcpy (Msg + sizeof(T_MsgHdr), &ChatMsg, sizeof(T_ChatMsg));
 692     mSocket->sendto (Msg, sizeof(T_MsgHdr) + sizeof(T_ChatMsg), 0, &mServer);
 693     iNextBlockPosition += MAX_CHAT_MSG_LEN - 1;
 694
 695   }
 696
 697
 698 } // FGMultiplayMgr::SendTextMessage ()
 699 //////////////////////////////////////////////////////////////////////
 700
 701 //////////////////////////////////////////////////////////////////////
 702 //
 703 //  Name: ProcessData
 704 //  Description: Processes data waiting at the receive socket. The
 705 //  processing ends when there is no more data at the socket.
 706 //
 707 //////////////////////////////////////////////////////////////////////
 708 void
 709 FGMultiplayMgr::Update(void)
 710 {
 711   if (!mInitialised)
 712     return;
 713
 714   /// Just for expiry
 715   long stamp = SGTimeStamp::now().getSeconds();
 716
 717   //////////////////////////////////////////////////
 718   //  Read the receive socket and process any data
 719   //////////////////////////////////////////////////
 720   int bytes;
 721   do {
 722     MsgBuf msgBuf;
 723     //////////////////////////////////////////////////
 724     //  Although the recv call asks for
 725     //  MAX_PACKET_SIZE of data, the number of bytes
 726     //  returned will only be that of the next
 727     //  packet waiting to be processed.
 728     //////////////////////////////////////////////////
 729     netAddress SenderAddress;
 730     bytes = mSocket->recvfrom(msgBuf.Msg, sizeof(msgBuf.Msg), 0,
 731                               &SenderAddress);
 732     //////////////////////////////////////////////////
 733     //  no Data received
 734     //////////////////////////////////////////////////
 735     if (bytes <= 0) {
 736       if (errno != EAGAIN && errno != 0) // MSVC output "NoError" otherwise
 737         perror("FGMultiplayMgr::MP_ProcessData");
 738       break;
 739     }
 740     if (bytes <= sizeof(T_MsgHdr)) {
 741       SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
 742               << "received message with insufficient data" );
 743       break;
 744     }
 745     //////////////////////////////////////////////////
 746     //  Read header
 747     //////////////////////////////////////////////////
 748     T_MsgHdr* MsgHdr = msgBuf.msgHdr();
 749     MsgHdr->Magic       = XDR_decode_uint32 (MsgHdr->Magic);
 750     MsgHdr->Version     = XDR_decode_uint32 (MsgHdr->Version);
 751     MsgHdr->MsgId       = XDR_decode_uint32 (MsgHdr->MsgId);
 752     MsgHdr->MsgLen      = XDR_decode_uint32 (MsgHdr->MsgLen);
 753     MsgHdr->ReplyPort   = XDR_decode_uint32 (MsgHdr->ReplyPort);
 754     MsgHdr->Callsign[MAX_CALLSIGN_LEN -1] = '\0';
 755     if (MsgHdr->Magic != MSG_MAGIC) {
 756       SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
 757               << "message has invalid magic number!" );
 758       break;
 759     }
 760     if (MsgHdr->Version != PROTO_VER) {
 761       SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
 762               << "message has invalid protocoll number!" );
 763       break;
 764     }
 765     if (MsgHdr->MsgLen != bytes) {
 766       SG_LOG(SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
 767              << "message from " << MsgHdr->Callsign << " has invalid length!");
 768       break;
 769     }
 770     //////////////////////////////////////////////////
 771     //  Process messages
 772     //////////////////////////////////////////////////
 773     switch (MsgHdr->MsgId) {
 774     case CHAT_MSG_ID:
 775       ProcessChatMsg(msgBuf, SenderAddress);
 776       break;
 777     case POS_DATA_ID:
 778       ProcessPosMsg(msgBuf, SenderAddress, stamp);
 779       break;
 780     case UNUSABLE_POS_DATA_ID:
 781     case OLD_OLD_POS_DATA_ID:
 782     case OLD_PROP_MSG_ID:
 783     case OLD_POS_DATA_ID:
 784       break;
 785     default:
 786       SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
 787               << "Unknown message Id received: " << MsgHdr->MsgId );
 788       break;
 789     }
 790   } while (bytes > 0);
 791
 792   // check for expiry
 793   MultiPlayerMap::iterator it = mMultiPlayerMap.begin();
 794   while (it != mMultiPlayerMap.end()) {
 795     if (it->second->getLastTimestamp() + 10 < stamp) {
 796       std::string name = it->first;
 797       it->second->setDie(true);
 798       mMultiPlayerMap.erase(it);
 799       it = mMultiPlayerMap.upper_bound(name);
 800     } else
 801       ++it;
 802   }
 803 } // FGMultiplayMgr::ProcessData(void)
 804 //////////////////////////////////////////////////////////////////////
 805
 806 //////////////////////////////////////////////////////////////////////
 807 //
 808 //  handle a position message
 809 //
 810 //////////////////////////////////////////////////////////////////////
 811 void
 812 FGMultiplayMgr::ProcessPosMsg(const FGMultiplayMgr::MsgBuf& Msg,
 813                               const netAddress& SenderAddress, long stamp)
 814 {
 815   const T_MsgHdr* MsgHdr = Msg.msgHdr();
 816   if (MsgHdr->MsgLen < sizeof(T_MsgHdr) + sizeof(T_PositionMsg)) {
 817     SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
 818             << "Position message received with insufficient data" );
 819     return;
 820   }
 821   const T_PositionMsg* PosMsg = Msg.posMsg();
 822   FGExternalMotionData motionInfo;
 823   motionInfo.time = XDR_decode_double(PosMsg->time);
 824   motionInfo.lag = XDR_decode_double(PosMsg->lag);
 825   for (unsigned i = 0; i < 3; ++i)
 826     motionInfo.position(i) = XDR_decode_double(PosMsg->position[i]);
 827   SGVec3f angleAxis;
 828   for (unsigned i = 0; i < 3; ++i)
 829     angleAxis(i) = XDR_decode_float(PosMsg->orientation[i]);
 830   motionInfo.orientation = SGQuatf::fromAngleAxis(angleAxis);
 831   for (unsigned i = 0; i < 3; ++i)
 832     motionInfo.linearVel(i) = XDR_decode_float(PosMsg->linearVel[i]);
 833   for (unsigned i = 0; i < 3; ++i)
 834     motionInfo.angularVel(i) = XDR_decode_float(PosMsg->angularVel[i]);
 835   for (unsigned i = 0; i < 3; ++i)
 836     motionInfo.linearAccel(i) = XDR_decode_float(PosMsg->linearAccel[i]);
 837   for (unsigned i = 0; i < 3; ++i)
 838     motionInfo.angularAccel(i) = XDR_decode_float(PosMsg->angularAccel[i]);
 839
 840
 841   //cout << "INPUT MESSAGE\n";
 842
 843   // There was a bug in 1.9.0 and before: T_PositionMsg was 196 bytes
 844   // on 32 bit architectures and 200 bytes on 64 bit, and this
 845   // structure is put directly on the wire. By looking at the padding,
 846   // we can sort through the mess, mostly:
 847   // If padding is 0 (which is not a valid property type), then the
 848   // message was produced by a new client or an old 64 bit client that
 849   // happened to have 0 on the stack;
 850   // Else if the property list starting with the padding word is
 851   // well-formed, then the client is probably an old 32 bit client and
 852   // we'll go with that;
 853   // Else it is an old 64-bit client and properties start after the
 854   // padding.
 855   // There is a chance that we could be fooled by garbage in the
 856   // padding looking like a valid property, so verifyProperties() is
 857   // strict about the validity of the property values.
 858   const xdr_data_t* xdr = Msg.properties();
 859   if (PosMsg->pad != 0) {
 860     if (verifyProperties(&PosMsg->pad, Msg.propsRecvdEnd()))
 861       xdr = &PosMsg->pad;
 862     else if (!verifyProperties(xdr, Msg.propsRecvdEnd()))
 863       goto noprops;
 864   }
 865   while (xdr < Msg.propsRecvdEnd()) {
 866     FGPropertyData* pData = new FGPropertyData;
 867     SGPropertyNode::Type type = SGPropertyNode::UNSPECIFIED;
 868
 869     // First element is always the ID
 870     pData->id = XDR_decode_uint32(*xdr);
 871     //cout << pData->id << " ";
 872     xdr++;
 873
 874     // Check the ID actually exists and get the type
 875     const IdPropertyList* plist = findProperty(pData->id);
 876
 877     if (plist)
 878     {
 879       pData->type = plist->type;
 880       // How we decode the remainder of the property depends on the type
 881       switch (pData->type) {
 882         case SGPropertyNode::INT:
 883         case SGPropertyNode::BOOL:
 884         case SGPropertyNode::LONG:
 885           pData->int_value = XDR_decode_uint32(*xdr);
 886           xdr++;
 887           //cout << pData->int_value << "\n";
 888           break;
 889         case SGPropertyNode::FLOAT:
 890         case SGPropertyNode::DOUBLE:
 891           pData->float_value = XDR_decode_float(*xdr);
 892           xdr++;
 893           //cout << pData->float_value << "\n";
 894           break;
 895         case SGPropertyNode::STRING:
 896         case SGPropertyNode::UNSPECIFIED:
 897           {
 898             // String is complicated. It consists of
 899             // The length of the string
 900             // The string itself
 901             // Padding to the nearest 4-bytes.
 902             uint32_t length = XDR_decode_uint32(*xdr);
 903             xdr++;
 904             //cout << length << " ";
 905             // Old versions truncated the string but left the length unadjusted.
 906             if (length > MAX_TEXT_SIZE)
 907               length = MAX_TEXT_SIZE;
 908             pData->string_value = new char[length + 1];
 909             //cout << " String: ";
 910             for (int i = 0; i < length; i++)
 911               {
 912                 pData->string_value[i] = (char) XDR_decode_int8(*xdr);
 913                 xdr++;
 914                 //cout << pData->string_value[i];
 915               }
 916
 917             pData->string_value[length] = '\0';
 918
 919             // Now handle the padding
 920             while ((length % 4) != 0)
 921               {
 922                 xdr++;
 923                 length++;
 924                 //cout << "0";
 925               }
 926             //cout << "\n";
 927           }
 928           break;
 929
 930         default:
 931           pData->float_value = XDR_decode_float(*xdr);
 932           SG_LOG(SG_NETWORK, SG_ALERT, "Unknown Prop type " << pData->id << " " << pData->type);
 933           xdr++;
 934           break;
 935       }
 936
 937       motionInfo.properties.push_back(pData);
 938     }
 939     else
 940     {
 941       // We failed to find the property. We'll try the next packet immediately.
 942       SG_LOG(SG_NETWORK, SG_INFO, "FGMultiplayMgr::ProcessPosMsg - "
 943              "message from " << MsgHdr->Callsign << " has unknown property id "
 944              << pData->id);
 945     }
 946   }
 947  noprops:
 948   FGAIMultiplayer* mp = getMultiplayer(MsgHdr->Callsign);
 949   if (!mp)
 950     mp = addMultiplayer(MsgHdr->Callsign, PosMsg->Model);
 951   mp->addMotionInfo(motionInfo, stamp);
 952 } // FGMultiplayMgr::ProcessPosMsg()
 953 //////////////////////////////////////////////////////////////////////
 954
 955 //////////////////////////////////////////////////////////////////////
 956 //
 957 //  handle a chat message
 958 //  FIXME: display chat message withi flightgear
 959 //
 960 //////////////////////////////////////////////////////////////////////
 961 void
 962 FGMultiplayMgr::ProcessChatMsg(const MsgBuf& Msg,
 963                                const netAddress& SenderAddress)
 964 {
 965   const T_MsgHdr* MsgHdr = Msg.msgHdr();
 966   if (MsgHdr->MsgLen < sizeof(T_MsgHdr) + 1) {
 967     SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
 968             << "Chat message received with insufficient data" );
 969     return;
 970   }
 971
 972   char *chatStr = new char[MsgHdr->MsgLen - sizeof(T_MsgHdr)];
 973   strncpy(chatStr,
 974           (reinterpret_cast<const T_ChatMsg *>(Msg.Msg + sizeof(T_MsgHdr)))
 975           ->Text,
 976           MsgHdr->MsgLen - sizeof(T_MsgHdr));
 977   chatStr[MsgHdr->MsgLen - sizeof(T_MsgHdr) - 1] = '\0';
 978
 979   const T_ChatMsg* ChatMsg
 980       = reinterpret_cast<const T_ChatMsg *>(Msg.Msg + sizeof(T_MsgHdr));
 981   SG_LOG (SG_NETWORK, SG_WARN, "Chat [" << MsgHdr->Callsign << "]"
 982            << " " << chatStr);
 983
 984   delete [] chatStr;
 985 } // FGMultiplayMgr::ProcessChatMsg ()
 986 //////////////////////////////////////////////////////////////////////
 987
 988 void
 989 FGMultiplayMgr::FillMsgHdr(T_MsgHdr *MsgHdr, int MsgId, unsigned _len)
 990 {
 991   uint32_t len;
 992   switch (MsgId) {
 993   case CHAT_MSG_ID:
 994     len = sizeof(T_MsgHdr) + sizeof(T_ChatMsg);
 995     break;
 996   case POS_DATA_ID:
 997     len = _len;
 998     break;
 999   default:
1000     len = sizeof(T_MsgHdr);
1001     break;
1002   }
1003   MsgHdr->Magic           = XDR_encode_uint32(MSG_MAGIC);
1004   MsgHdr->Version         = XDR_encode_uint32(PROTO_VER);
1005   MsgHdr->MsgId           = XDR_encode_uint32(MsgId);
1006   MsgHdr->MsgLen          = XDR_encode_uint32(len);
1007   MsgHdr->ReplyAddress    = 0; // Are obsolete, keep them for the server for
1008   MsgHdr->ReplyPort       = 0; // now
1009   strncpy(MsgHdr->Callsign, mCallsign.c_str(), MAX_CALLSIGN_LEN);
1010   MsgHdr->Callsign[MAX_CALLSIGN_LEN - 1] = '\0';
1011 }
1012
1013 FGAIMultiplayer*
1014 FGMultiplayMgr::addMultiplayer(const std::string& callsign,
1015                                const std::string& modelName)
1016 {
1017   if (0 < mMultiPlayerMap.count(callsign))
1018     return mMultiPlayerMap[callsign].get();
1019
1020   FGAIMultiplayer* mp = new FGAIMultiplayer;
1021   mp->setPath(modelName.c_str());
1022   mp->setCallSign(callsign);
1023   mMultiPlayerMap[callsign] = mp;
1024
1025   FGAIManager *aiMgr = (FGAIManager*)globals->get_subsystem("ai_model");
1026   if (aiMgr) {
1027     aiMgr->attach(mp);
1028
1029     /// FIXME: that must follow the attach ATM ...
1030     for (unsigned i = 0; i < numProperties; ++i)
1031       mp->addPropertyId(sIdPropertyList[i].id, sIdPropertyList[i].name);
1032   }
1033
1034   return mp;
1035 }
1036
1037 FGAIMultiplayer*
1038 FGMultiplayMgr::getMultiplayer(const std::string& callsign)
1039 {
1040   if (0 < mMultiPlayerMap.count(callsign))
1041     return mMultiPlayerMap[callsign].get();
1042   else
1043     return 0;
1044 }