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