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