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