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