1 //////////////////////////////////////////////////////////////////////
5 // Written by Duncan McCreanor, started February 2003.
6 // duncan.mccreanor@airservicesaustralia.com
8 // Copyright (C) 2003 Airservices Australia
9 // Copyright (C) 2005 Oliver Schroeder
10 // Copyright (C) 2006 Mathias Froehlich
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.
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.
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.
28 //////////////////////////////////////////////////////////////////////
37 #include <osg/Math> // isNaN
39 #include <simgear/misc/stdint.hxx>
40 #include <simgear/timing/timestamp.hxx>
41 #include <simgear/debug/logstream.hxx>
42 #include <simgear/props/props.hxx>
44 #include <AIModel/AIManager.hxx>
45 #include <AIModel/AIMultiplayer.hxx>
46 #include <Main/fg_props.hxx>
47 #include "multiplaymgr.hxx"
48 #include "mpmessages.hxx"
49 #include <FDM/flightProperties.hxx>
53 #define MAX_PACKET_SIZE 1200
54 #define MAX_TEXT_SIZE 128
56 // These constants are provided so that the ident
57 // command can list file versions
58 const char sMULTIPLAYMGR_BID[] = "$Id$";
59 const char sMULTIPLAYMGR_HID[] = MULTIPLAYTXMGR_HID;
61 struct IdPropertyList {
64 simgear::props::Type type;
67 static const IdPropertyList* findProperty(unsigned id);
69 // A static map of protocol property id values to property paths,
70 // This should be extendable dynamically for every specific aircraft ...
71 // For now only that static list
72 static const IdPropertyList sIdPropertyList[] = {
73 {100, "surface-positions/left-aileron-pos-norm", simgear::props::FLOAT},
74 {101, "surface-positions/right-aileron-pos-norm", simgear::props::FLOAT},
75 {102, "surface-positions/elevator-pos-norm", simgear::props::FLOAT},
76 {103, "surface-positions/rudder-pos-norm", simgear::props::FLOAT},
77 {104, "surface-positions/flap-pos-norm", simgear::props::FLOAT},
78 {105, "surface-positions/speedbrake-pos-norm", simgear::props::FLOAT},
79 {106, "gear/tailhook/position-norm", simgear::props::FLOAT},
80 {107, "gear/launchbar/position-norm", simgear::props::FLOAT},
81 {108, "gear/launchbar/state", simgear::props::STRING},
82 {109, "gear/launchbar/holdback-position-norm", simgear::props::FLOAT},
83 {110, "canopy/position-norm", simgear::props::FLOAT},
84 {111, "surface-positions/wing-pos-norm", simgear::props::FLOAT},
85 {112, "surface-positions/wing-fold-pos-norm", simgear::props::FLOAT},
87 {200, "gear/gear[0]/compression-norm", simgear::props::FLOAT},
88 {201, "gear/gear[0]/position-norm", simgear::props::FLOAT},
89 {210, "gear/gear[1]/compression-norm", simgear::props::FLOAT},
90 {211, "gear/gear[1]/position-norm", simgear::props::FLOAT},
91 {220, "gear/gear[2]/compression-norm", simgear::props::FLOAT},
92 {221, "gear/gear[2]/position-norm", simgear::props::FLOAT},
93 {230, "gear/gear[3]/compression-norm", simgear::props::FLOAT},
94 {231, "gear/gear[3]/position-norm", simgear::props::FLOAT},
95 {240, "gear/gear[4]/compression-norm", simgear::props::FLOAT},
96 {241, "gear/gear[4]/position-norm", simgear::props::FLOAT},
98 {300, "engines/engine[0]/n1", simgear::props::FLOAT},
99 {301, "engines/engine[0]/n2", simgear::props::FLOAT},
100 {302, "engines/engine[0]/rpm", simgear::props::FLOAT},
101 {310, "engines/engine[1]/n1", simgear::props::FLOAT},
102 {311, "engines/engine[1]/n2", simgear::props::FLOAT},
103 {312, "engines/engine[1]/rpm", simgear::props::FLOAT},
104 {320, "engines/engine[2]/n1", simgear::props::FLOAT},
105 {321, "engines/engine[2]/n2", simgear::props::FLOAT},
106 {322, "engines/engine[2]/rpm", simgear::props::FLOAT},
107 {330, "engines/engine[3]/n1", simgear::props::FLOAT},
108 {331, "engines/engine[3]/n2", simgear::props::FLOAT},
109 {332, "engines/engine[3]/rpm", simgear::props::FLOAT},
110 {340, "engines/engine[4]/n1", simgear::props::FLOAT},
111 {341, "engines/engine[4]/n2", simgear::props::FLOAT},
112 {342, "engines/engine[4]/rpm", simgear::props::FLOAT},
113 {350, "engines/engine[5]/n1", simgear::props::FLOAT},
114 {351, "engines/engine[5]/n2", simgear::props::FLOAT},
115 {352, "engines/engine[5]/rpm", simgear::props::FLOAT},
116 {360, "engines/engine[6]/n1", simgear::props::FLOAT},
117 {361, "engines/engine[6]/n2", simgear::props::FLOAT},
118 {362, "engines/engine[6]/rpm", simgear::props::FLOAT},
119 {370, "engines/engine[7]/n1", simgear::props::FLOAT},
120 {371, "engines/engine[7]/n2", simgear::props::FLOAT},
121 {372, "engines/engine[7]/rpm", simgear::props::FLOAT},
122 {380, "engines/engine[8]/n1", simgear::props::FLOAT},
123 {381, "engines/engine[8]/n2", simgear::props::FLOAT},
124 {382, "engines/engine[8]/rpm", simgear::props::FLOAT},
125 {390, "engines/engine[9]/n1", simgear::props::FLOAT},
126 {391, "engines/engine[9]/n2", simgear::props::FLOAT},
127 {392, "engines/engine[9]/rpm", simgear::props::FLOAT},
129 {800, "rotors/main/rpm", simgear::props::FLOAT},
130 {801, "rotors/tail/rpm", simgear::props::FLOAT},
131 {810, "rotors/main/blade[0]/position-deg", simgear::props::FLOAT},
132 {811, "rotors/main/blade[1]/position-deg", simgear::props::FLOAT},
133 {812, "rotors/main/blade[2]/position-deg", simgear::props::FLOAT},
134 {813, "rotors/main/blade[3]/position-deg", simgear::props::FLOAT},
135 {820, "rotors/main/blade[0]/flap-deg", simgear::props::FLOAT},
136 {821, "rotors/main/blade[1]/flap-deg", simgear::props::FLOAT},
137 {822, "rotors/main/blade[2]/flap-deg", simgear::props::FLOAT},
138 {823, "rotors/main/blade[3]/flap-deg", simgear::props::FLOAT},
139 {830, "rotors/tail/blade[0]/position-deg", simgear::props::FLOAT},
140 {831, "rotors/tail/blade[1]/position-deg", simgear::props::FLOAT},
142 {900, "sim/hitches/aerotow/tow/length", simgear::props::FLOAT},
143 {901, "sim/hitches/aerotow/tow/elastic-constant", simgear::props::FLOAT},
144 {902, "sim/hitches/aerotow/tow/weight-per-m-kg-m", simgear::props::FLOAT},
145 {903, "sim/hitches/aerotow/tow/dist", simgear::props::FLOAT},
146 {904, "sim/hitches/aerotow/tow/connected-to-property-node", simgear::props::BOOL},
147 {905, "sim/hitches/aerotow/tow/connected-to-ai-or-mp-callsign", simgear::props::STRING},
148 {906, "sim/hitches/aerotow/tow/brake-force", simgear::props::FLOAT},
149 {907, "sim/hitches/aerotow/tow/end-force-x", simgear::props::FLOAT},
150 {908, "sim/hitches/aerotow/tow/end-force-y", simgear::props::FLOAT},
151 {909, "sim/hitches/aerotow/tow/end-force-z", simgear::props::FLOAT},
152 {930, "sim/hitches/aerotow/is-slave", simgear::props::BOOL},
153 {931, "sim/hitches/aerotow/speed-in-tow-direction", simgear::props::FLOAT},
154 {932, "sim/hitches/aerotow/open", simgear::props::BOOL},
155 {933, "sim/hitches/aerotow/local-pos-x", simgear::props::FLOAT},
156 {934, "sim/hitches/aerotow/local-pos-y", simgear::props::FLOAT},
157 {935, "sim/hitches/aerotow/local-pos-z", simgear::props::FLOAT},
159 {1001, "controls/flight/slats", simgear::props::FLOAT},
160 {1002, "controls/flight/speedbrake", simgear::props::FLOAT},
161 {1003, "controls/flight/spoilers", simgear::props::FLOAT},
162 {1004, "controls/gear/gear-down", simgear::props::FLOAT},
163 {1005, "controls/lighting/nav-lights", simgear::props::FLOAT},
164 {1006, "controls/armament/station[0]/jettison-all", simgear::props::BOOL},
166 {1100, "sim/model/variant", simgear::props::INT},
167 {1101, "sim/model/livery/file", simgear::props::STRING},
169 {1200, "environment/wildfire/data", simgear::props::STRING},
170 {1201, "environment/contrail", simgear::props::INT},
172 {1300, "tanker", simgear::props::INT},
174 {10001, "sim/multiplay/transmission-freq-hz", simgear::props::STRING},
175 {10002, "sim/multiplay/chat", simgear::props::STRING},
177 {10100, "sim/multiplay/generic/string[0]", simgear::props::STRING},
178 {10101, "sim/multiplay/generic/string[1]", simgear::props::STRING},
179 {10102, "sim/multiplay/generic/string[2]", simgear::props::STRING},
180 {10103, "sim/multiplay/generic/string[3]", simgear::props::STRING},
181 {10104, "sim/multiplay/generic/string[4]", simgear::props::STRING},
182 {10105, "sim/multiplay/generic/string[5]", simgear::props::STRING},
183 {10106, "sim/multiplay/generic/string[6]", simgear::props::STRING},
184 {10107, "sim/multiplay/generic/string[7]", simgear::props::STRING},
185 {10108, "sim/multiplay/generic/string[8]", simgear::props::STRING},
186 {10109, "sim/multiplay/generic/string[9]", simgear::props::STRING},
187 {10110, "sim/multiplay/generic/string[10]", simgear::props::STRING},
188 {10111, "sim/multiplay/generic/string[11]", simgear::props::STRING},
189 {10112, "sim/multiplay/generic/string[12]", simgear::props::STRING},
190 {10113, "sim/multiplay/generic/string[13]", simgear::props::STRING},
191 {10114, "sim/multiplay/generic/string[14]", simgear::props::STRING},
192 {10115, "sim/multiplay/generic/string[15]", simgear::props::STRING},
193 {10116, "sim/multiplay/generic/string[16]", simgear::props::STRING},
194 {10117, "sim/multiplay/generic/string[17]", simgear::props::STRING},
195 {10118, "sim/multiplay/generic/string[18]", simgear::props::STRING},
196 {10119, "sim/multiplay/generic/string[19]", simgear::props::STRING},
198 {10200, "sim/multiplay/generic/float[0]", simgear::props::FLOAT},
199 {10201, "sim/multiplay/generic/float[1]", simgear::props::FLOAT},
200 {10202, "sim/multiplay/generic/float[2]", simgear::props::FLOAT},
201 {10203, "sim/multiplay/generic/float[3]", simgear::props::FLOAT},
202 {10204, "sim/multiplay/generic/float[4]", simgear::props::FLOAT},
203 {10205, "sim/multiplay/generic/float[5]", simgear::props::FLOAT},
204 {10206, "sim/multiplay/generic/float[6]", simgear::props::FLOAT},
205 {10207, "sim/multiplay/generic/float[7]", simgear::props::FLOAT},
206 {10208, "sim/multiplay/generic/float[8]", simgear::props::FLOAT},
207 {10209, "sim/multiplay/generic/float[9]", simgear::props::FLOAT},
208 {10210, "sim/multiplay/generic/float[10]", simgear::props::FLOAT},
209 {10211, "sim/multiplay/generic/float[11]", simgear::props::FLOAT},
210 {10212, "sim/multiplay/generic/float[12]", simgear::props::FLOAT},
211 {10213, "sim/multiplay/generic/float[13]", simgear::props::FLOAT},
212 {10214, "sim/multiplay/generic/float[14]", simgear::props::FLOAT},
213 {10215, "sim/multiplay/generic/float[15]", simgear::props::FLOAT},
214 {10216, "sim/multiplay/generic/float[16]", simgear::props::FLOAT},
215 {10217, "sim/multiplay/generic/float[17]", simgear::props::FLOAT},
216 {10218, "sim/multiplay/generic/float[18]", simgear::props::FLOAT},
217 {10219, "sim/multiplay/generic/float[19]", simgear::props::FLOAT},
219 {10300, "sim/multiplay/generic/int[0]", simgear::props::INT},
220 {10301, "sim/multiplay/generic/int[1]", simgear::props::INT},
221 {10302, "sim/multiplay/generic/int[2]", simgear::props::INT},
222 {10303, "sim/multiplay/generic/int[3]", simgear::props::INT},
223 {10304, "sim/multiplay/generic/int[4]", simgear::props::INT},
224 {10305, "sim/multiplay/generic/int[5]", simgear::props::INT},
225 {10306, "sim/multiplay/generic/int[6]", simgear::props::INT},
226 {10307, "sim/multiplay/generic/int[7]", simgear::props::INT},
227 {10308, "sim/multiplay/generic/int[8]", simgear::props::INT},
228 {10309, "sim/multiplay/generic/int[9]", simgear::props::INT},
229 {10310, "sim/multiplay/generic/int[10]", simgear::props::INT},
230 {10311, "sim/multiplay/generic/int[11]", simgear::props::INT},
231 {10312, "sim/multiplay/generic/int[12]", simgear::props::INT},
232 {10313, "sim/multiplay/generic/int[13]", simgear::props::INT},
233 {10314, "sim/multiplay/generic/int[14]", simgear::props::INT},
234 {10315, "sim/multiplay/generic/int[15]", simgear::props::INT},
235 {10316, "sim/multiplay/generic/int[16]", simgear::props::INT},
236 {10317, "sim/multiplay/generic/int[17]", simgear::props::INT},
237 {10318, "sim/multiplay/generic/int[18]", simgear::props::INT},
238 {10319, "sim/multiplay/generic/int[19]", simgear::props::INT}
241 const unsigned int numProperties = (sizeof(sIdPropertyList)
242 / sizeof(sIdPropertyList[0]));
244 // Look up a property ID using binary search.
247 struct ComparePropertyId
249 bool operator()(const IdPropertyList& lhs,
250 const IdPropertyList& rhs)
252 return lhs.id < rhs.id;
254 bool operator()(const IdPropertyList& lhs,
259 bool operator()(unsigned id,
260 const IdPropertyList& rhs)
267 const IdPropertyList* findProperty(unsigned id)
269 std::pair<const IdPropertyList*, const IdPropertyList*> result
270 = std::equal_range(sIdPropertyList, sIdPropertyList + numProperties, id,
271 ComparePropertyId());
272 if (result.first == result.second) {
281 bool verifyProperties(const xdr_data_t* data, const xdr_data_t* end)
283 using namespace simgear;
284 const xdr_data_t* xdr = data;
286 unsigned id = XDR_decode_uint32(*xdr);
287 const IdPropertyList* plist = findProperty(id);
291 // How we decode the remainder of the property depends on the type
292 switch (plist->type) {
301 float val = XDR_decode_float(*xdr);
308 case props::UNSPECIFIED:
310 // String is complicated. It consists of
311 // The length of the string
313 // Padding to the nearest 4-bytes.
314 // XXX Yes, each byte is padded out to a word! Too late
316 uint32_t length = XDR_decode_uint32(*xdr);
318 // Old versions truncated the string but left the length
320 if (length > MAX_TEXT_SIZE)
321 length = MAX_TEXT_SIZE;
323 // Now handle the padding
324 while ((length % 4) != 0)
333 // cerr << "Unknown Prop type " << id << " " << type << "\n";
339 // give up; this is a malformed property list.
347 class MPPropertyListener : public SGPropertyChangeListener
350 MPPropertyListener(FGMultiplayMgr* mp) :
355 virtual void childAdded(SGPropertyNode*, SGPropertyNode*)
357 _multiplay->setPropertiesChanged();
361 FGMultiplayMgr* _multiplay;
364 //////////////////////////////////////////////////////////////////////
366 // MultiplayMgr constructor
368 //////////////////////////////////////////////////////////////////////
369 FGMultiplayMgr::FGMultiplayMgr()
371 mInitialised = false;
374 } // FGMultiplayMgr::FGMultiplayMgr()
375 //////////////////////////////////////////////////////////////////////
377 //////////////////////////////////////////////////////////////////////
379 // MultiplayMgr destructor
381 //////////////////////////////////////////////////////////////////////
382 FGMultiplayMgr::~FGMultiplayMgr()
385 } // FGMultiplayMgr::~FGMultiplayMgr()
386 //////////////////////////////////////////////////////////////////////
388 //////////////////////////////////////////////////////////////////////
392 //////////////////////////////////////////////////////////////////////
394 FGMultiplayMgr::init (void)
396 //////////////////////////////////////////////////
397 // Initialise object if not already done
398 //////////////////////////////////////////////////
400 SG_LOG(SG_NETWORK, SG_WARN, "FGMultiplayMgr::init - already initialised");
404 fgSetBool("/sim/multiplay/online", false);
406 //////////////////////////////////////////////////
407 // Set members from property values
408 //////////////////////////////////////////////////
409 short rxPort = fgGetInt("/sim/multiplay/rxport");
410 string rxAddress = fgGetString("/sim/multiplay/rxhost");
411 short txPort = fgGetInt("/sim/multiplay/txport", 5000);
412 string txAddress = fgGetString("/sim/multiplay/txhost");
414 int hz = fgGetInt("/sim/multiplay/tx-rate-hz", 10);
420 mTimeUntilSend = 0.0;
422 mCallsign = fgGetString("/sim/multiplay/callsign");
423 if ((!txAddress.empty()) && (txAddress!="0")) {
424 mServer.set(txAddress.c_str(), txPort);
425 if (strncmp (mServer.getHost(), "0.0.0.0", 8) == 0) {
427 SG_LOG(SG_NETWORK, SG_ALERT,
428 "FGMultiplayMgr - Could not resolve '"
429 << txAddress << "'. Multiplayer mode disabled.");
432 SG_LOG(SG_NETWORK, SG_INFO, "FGMultiplayMgr - have server");
439 SG_LOG(SG_NETWORK, SG_ALERT,
440 "FGMultiplayMgr - No receiver port. Multiplayer mode disabled.");
443 if (mCallsign.empty())
444 mCallsign = "JohnDoe"; // FIXME: use getpwuid
445 SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-txaddress= "<<txAddress);
446 SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-txport= "<<txPort );
447 SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-rxaddress="<<rxAddress );
448 SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-rxport= "<<rxPort);
449 SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-callsign= "<<mCallsign);
451 mSocket.reset(new simgear::Socket());
452 if (!mSocket->open(false)) {
453 SG_LOG( SG_NETWORK, SG_WARN,
454 "FGMultiplayMgr - Failed to create data socket." );
457 mSocket->setBlocking(false);
458 if (mSocket->bind(rxAddress.c_str(), rxPort) != 0) {
459 SG_LOG( SG_NETWORK, SG_ALERT,
460 "FGMultiplayMgr - Failed to bind receive socket. Multiplayer mode disabled. "
461 << strerror(errno) << "(errno " << errno << ")");
465 mPropertiesChanged = true;
466 mListener = new MPPropertyListener(this);
467 globals->get_props()->addChangeListener(mListener, false);
469 fgSetBool("/sim/multiplay/online", true);
471 } // FGMultiplayMgr::init()
472 //////////////////////////////////////////////////////////////////////
474 //////////////////////////////////////////////////////////////////////
476 // Closes and deletes the local player object. Closes
477 // and deletes the tx socket. Resets the object state to unitialised.
479 //////////////////////////////////////////////////////////////////////
481 FGMultiplayMgr::shutdown (void)
483 fgSetBool("/sim/multiplay/online", false);
490 MultiPlayerMap::iterator it = mMultiPlayerMap.begin(),
491 end = mMultiPlayerMap.end();
492 for (; it != end; ++it) {
493 it->second->setDie(true);
495 mMultiPlayerMap.clear();
498 globals->get_props()->removeChangeListener(mListener);
503 mInitialised = false;
504 } // FGMultiplayMgr::Close(void)
505 //////////////////////////////////////////////////////////////////////
508 FGMultiplayMgr::reinit()
514 //////////////////////////////////////////////////////////////////////
516 // Description: Sends the position data for the local position.
518 //////////////////////////////////////////////////////////////////////
521 * The buffer that holds a multi-player message, suitably aligned.
523 union FGMultiplayMgr::MsgBuf
527 memset(&Msg, 0, sizeof(Msg));
535 const T_MsgHdr* msgHdr() const
537 return reinterpret_cast<const T_MsgHdr*>(&Header);
540 T_PositionMsg* posMsg()
542 return reinterpret_cast<T_PositionMsg*>(Msg + sizeof(T_MsgHdr));
545 const T_PositionMsg* posMsg() const
547 return reinterpret_cast<const T_PositionMsg*>(Msg + sizeof(T_MsgHdr));
550 xdr_data_t* properties()
552 return reinterpret_cast<xdr_data_t*>(Msg + sizeof(T_MsgHdr)
553 + sizeof(T_PositionMsg));
556 const xdr_data_t* properties() const
558 return reinterpret_cast<const xdr_data_t*>(Msg + sizeof(T_MsgHdr)
559 + sizeof(T_PositionMsg));
562 * The end of the properties buffer.
564 xdr_data_t* propsEnd()
566 return reinterpret_cast<xdr_data_t*>(Msg + MAX_PACKET_SIZE);
569 const xdr_data_t* propsEnd() const
571 return reinterpret_cast<const xdr_data_t*>(Msg + MAX_PACKET_SIZE);
574 * The end of properties actually in the buffer. This assumes that
575 * the message header is valid.
577 xdr_data_t* propsRecvdEnd()
579 return reinterpret_cast<xdr_data_t*>(Msg + Header.MsgLen);
582 const xdr_data_t* propsRecvdEnd() const
584 return reinterpret_cast<const xdr_data_t*>(Msg + Header.MsgLen);
587 xdr_data2_t double_val;
588 char Msg[MAX_PACKET_SIZE];
593 FGMultiplayMgr::isSane(const FGExternalMotionData& motionInfo)
595 // check for corrupted data (NaNs)
596 bool isCorrupted = false;
597 isCorrupted |= ((osg::isNaN(motionInfo.time )) ||
598 (osg::isNaN(motionInfo.lag )) ||
599 (osg::isNaN(motionInfo.orientation(3) )));
600 for (unsigned i = 0; (i < 3)&&(!isCorrupted); ++i)
602 isCorrupted |= ((osg::isNaN(motionInfo.position(i) ))||
603 (osg::isNaN(motionInfo.orientation(i) ))||
604 (osg::isNaN(motionInfo.linearVel(i)) )||
605 (osg::isNaN(motionInfo.angularVel(i)) )||
606 (osg::isNaN(motionInfo.linearAccel(i)) )||
607 (osg::isNaN(motionInfo.angularAccel(i)) ));
613 FGMultiplayMgr::SendMyPosition(const FGExternalMotionData& motionInfo)
615 if ((! mInitialised) || (! mHaveServer))
619 SG_LOG( SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::SendMyPosition - no server");
623 if (!isSane(motionInfo))
625 // Current local data is invalid (NaN), so stop MP transmission.
626 // => Be nice to older FG versions (no NaN checks) and don't waste bandwidth.
627 SG_LOG(SG_NETWORK, SG_ALERT, "FGMultiplayMgr::SendMyPosition - "
628 << "Local data is invalid (NaN). Data not transmitted.");
632 static MsgBuf msgBuf;
633 static unsigned msgLen = 0;
634 T_PositionMsg* PosMsg = msgBuf.posMsg();
636 strncpy(PosMsg->Model, fgGetString("/sim/model/path"), MAX_MODEL_NAME_LEN);
637 PosMsg->Model[MAX_MODEL_NAME_LEN - 1] = '\0';
638 if (fgGetBool("/sim/freeze/replay-state", true))
640 // do not send position updates during replay
641 for (unsigned i = 0 ; i < 3; ++i)
643 // no movement during replay
644 PosMsg->linearVel[i] = XDR_encode_float (0.0);
645 PosMsg->angularVel[i] = XDR_encode_float (0.0);
646 PosMsg->linearAccel[i] = XDR_encode_float (0.0);
647 PosMsg->angularAccel[i] = XDR_encode_float (0.0);
649 // all other data remains unchanged (resend last state)
653 PosMsg->time = XDR_encode_double (motionInfo.time);
654 PosMsg->lag = XDR_encode_double (motionInfo.lag);
655 for (unsigned i = 0 ; i < 3; ++i)
656 PosMsg->position[i] = XDR_encode_double (motionInfo.position(i));
658 motionInfo.orientation.getAngleAxis(angleAxis);
659 for (unsigned i = 0 ; i < 3; ++i)
660 PosMsg->orientation[i] = XDR_encode_float (angleAxis(i));
661 for (unsigned i = 0 ; i < 3; ++i)
662 PosMsg->linearVel[i] = XDR_encode_float (motionInfo.linearVel(i));
663 for (unsigned i = 0 ; i < 3; ++i)
664 PosMsg->angularVel[i] = XDR_encode_float (motionInfo.angularVel(i));
665 for (unsigned i = 0 ; i < 3; ++i)
666 PosMsg->linearAccel[i] = XDR_encode_float (motionInfo.linearAccel(i));
667 for (unsigned i = 0 ; i < 3; ++i)
668 PosMsg->angularAccel[i] = XDR_encode_float (motionInfo.angularAccel(i));
670 xdr_data_t* ptr = msgBuf.properties();
671 std::vector<FGPropertyData*>::const_iterator it;
672 it = motionInfo.properties.begin();
673 //cout << "OUTPUT PROPERTIES\n";
674 xdr_data_t* msgEnd = msgBuf.propsEnd();
675 while (it != motionInfo.properties.end() && ptr + 2 < msgEnd) {
677 // First element is the ID. Write it out when we know we have room for
678 // the whole property.
679 xdr_data_t id = XDR_encode_uint32((*it)->id);
680 // The actual data representation depends on the type
681 switch ((*it)->type) {
682 case simgear::props::INT:
683 case simgear::props::BOOL:
684 case simgear::props::LONG:
686 *ptr++ = XDR_encode_uint32((*it)->int_value);
687 //cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->int_value << "\n";
689 case simgear::props::FLOAT:
690 case simgear::props::DOUBLE:
692 *ptr++ = XDR_encode_float((*it)->float_value);
693 //cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->float_value << "\n";
695 case simgear::props::STRING:
696 case simgear::props::UNSPECIFIED:
698 // String is complicated. It consists of
699 // The length of the string
701 // Padding to the nearest 4-bytes.
702 const char* lcharptr = (*it)->string_value;
707 ////cout << "String length: " << strlen(lcharptr) << "\n";
708 uint32_t len = strlen(lcharptr);
709 if (len > MAX_TEXT_SIZE)
711 // XXX This should not be using 4 bytes per character!
712 // If there's not enough room for this property, drop it
714 if (ptr + 2 + ((len + 3) & ~3) > msgEnd)
716 //cout << "String length unint32: " << len << "\n";
718 *ptr++ = XDR_encode_uint32(len);
721 // Now the text itself
722 // XXX This should not be using 4 bytes per character!
724 while ((*lcharptr != '\0') && (lcount < MAX_TEXT_SIZE))
726 *ptr++ = XDR_encode_int8(*lcharptr);
731 //cout << "Prop:" << (*it)->id << " " << (*it)->type << " " << len << " " << (*it)->string_value;
733 // Now pad if required
734 while ((lcount % 4) != 0)
736 *ptr++ = XDR_encode_int8(0);
748 *ptr++ = XDR_encode_uint32(0);
749 //cout << "Prop:" << (*it)->id << " " << (*it)->type << " 0\n";
755 //cout << " Unknown Type: " << (*it)->type << "\n";
757 *ptr++ = XDR_encode_float((*it)->float_value);;
758 //cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->float_value << "\n";
765 msgLen = reinterpret_cast<char*>(ptr) - msgBuf.Msg;
766 FillMsgHdr(msgBuf.msgHdr(), POS_DATA_ID, msgLen);
769 mSocket->sendto(msgBuf.Msg, msgLen, 0, &mServer);
770 SG_LOG(SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::SendMyPosition");
771 } // FGMultiplayMgr::SendMyPosition()
773 //////////////////////////////////////////////////////////////////////
775 //////////////////////////////////////////////////////////////////////
777 // Name: SendTextMessage
778 // Description: Sends a message to the player. The message must
779 // contain a valid and correctly filled out header and optional
782 //////////////////////////////////////////////////////////////////////
784 FGMultiplayMgr::SendTextMessage(const string &MsgText)
786 if (!mInitialised || !mHaveServer)
790 FillMsgHdr(&MsgHdr, CHAT_MSG_ID);
791 //////////////////////////////////////////////////
792 // Divide the text string into blocks that fit
793 // in the message and send the blocks.
794 //////////////////////////////////////////////////
795 unsigned iNextBlockPosition = 0;
798 char Msg[sizeof(T_MsgHdr) + sizeof(T_ChatMsg)];
799 while (iNextBlockPosition < MsgText.length()) {
800 strncpy (ChatMsg.Text,
801 MsgText.substr(iNextBlockPosition, MAX_CHAT_MSG_LEN - 1).c_str(),
803 ChatMsg.Text[MAX_CHAT_MSG_LEN - 1] = '\0';
804 memcpy (Msg, &MsgHdr, sizeof(T_MsgHdr));
805 memcpy (Msg + sizeof(T_MsgHdr), &ChatMsg, sizeof(T_ChatMsg));
806 mSocket->sendto (Msg, sizeof(T_MsgHdr) + sizeof(T_ChatMsg), 0, &mServer);
807 iNextBlockPosition += MAX_CHAT_MSG_LEN - 1;
812 } // FGMultiplayMgr::SendTextMessage ()
813 //////////////////////////////////////////////////////////////////////
815 //////////////////////////////////////////////////////////////////////
818 // Description: Processes data waiting at the receive socket. The
819 // processing ends when there is no more data at the socket.
821 //////////////////////////////////////////////////////////////////////
823 FGMultiplayMgr::update(double dt)
829 long stamp = SGTimeStamp::now().getSeconds();
831 //////////////////////////////////////////////////
833 //////////////////////////////////////////////////
834 mTimeUntilSend -= dt;
835 if (mTimeUntilSend <= 0.0) {
839 //////////////////////////////////////////////////
840 // Read the receive socket and process any data
841 //////////////////////////////////////////////////
845 //////////////////////////////////////////////////
846 // Although the recv call asks for
847 // MAX_PACKET_SIZE of data, the number of bytes
848 // returned will only be that of the next
849 // packet waiting to be processed.
850 //////////////////////////////////////////////////
851 simgear::IPAddress SenderAddress;
852 int RecvStatus = mSocket->recvfrom(msgBuf.Msg, sizeof(msgBuf.Msg), 0,
854 //////////////////////////////////////////////////
856 //////////////////////////////////////////////////
860 // socket error reported?
861 // errno isn't thread-safe - so only check its value when
862 // socket return status < 0 really indicates a failure.
863 if ((RecvStatus < 0)&&
864 ((errno == EAGAIN) || (errno == 0))) // MSVC output "NoError" otherwise
866 // ignore "normal" errors
872 SG_LOG(SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::MP_ProcessData - Unable to receive data. "
873 << strerror(errno) << "(errno " << errno << ")");
877 // status is positive: bytes received
878 bytes = (ssize_t) RecvStatus;
879 if (bytes <= static_cast<ssize_t>(sizeof(T_MsgHdr))) {
880 SG_LOG( SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::MP_ProcessData - "
881 << "received message with insufficient data" );
884 //////////////////////////////////////////////////
886 //////////////////////////////////////////////////
887 T_MsgHdr* MsgHdr = msgBuf.msgHdr();
888 MsgHdr->Magic = XDR_decode_uint32 (MsgHdr->Magic);
889 MsgHdr->Version = XDR_decode_uint32 (MsgHdr->Version);
890 MsgHdr->MsgId = XDR_decode_uint32 (MsgHdr->MsgId);
891 MsgHdr->MsgLen = XDR_decode_uint32 (MsgHdr->MsgLen);
892 MsgHdr->ReplyPort = XDR_decode_uint32 (MsgHdr->ReplyPort);
893 MsgHdr->Callsign[MAX_CALLSIGN_LEN -1] = '\0';
894 if (MsgHdr->Magic != MSG_MAGIC) {
895 SG_LOG( SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::MP_ProcessData - "
896 << "message has invalid magic number!" );
899 if (MsgHdr->Version != PROTO_VER) {
900 SG_LOG( SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::MP_ProcessData - "
901 << "message has invalid protocol number!" );
904 if (static_cast<ssize_t>(MsgHdr->MsgLen) != bytes) {
905 SG_LOG(SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::MP_ProcessData - "
906 << "message from " << MsgHdr->Callsign << " has invalid length!");
909 //////////////////////////////////////////////////
911 //////////////////////////////////////////////////
912 switch (MsgHdr->MsgId) {
914 ProcessChatMsg(msgBuf, SenderAddress);
917 ProcessPosMsg(msgBuf, SenderAddress, stamp);
919 case UNUSABLE_POS_DATA_ID:
920 case OLD_OLD_POS_DATA_ID:
921 case OLD_PROP_MSG_ID:
922 case OLD_POS_DATA_ID:
925 SG_LOG( SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::MP_ProcessData - "
926 << "Unknown message Id received: " << MsgHdr->MsgId );
932 MultiPlayerMap::iterator it = mMultiPlayerMap.begin();
933 while (it != mMultiPlayerMap.end()) {
934 if (it->second->getLastTimestamp() + 10 < stamp) {
935 std::string name = it->first;
936 it->second->setDie(true);
937 mMultiPlayerMap.erase(it);
938 it = mMultiPlayerMap.upper_bound(name);
942 } // FGMultiplayMgr::ProcessData(void)
943 //////////////////////////////////////////////////////////////////////
946 FGMultiplayMgr::Send()
948 using namespace simgear;
952 // smooth the send rate, by adjusting based on the 'remainder' time, which
953 // is how -ve mTimeUntilSend is. Watch for large values and ignore them,
955 if ((mTimeUntilSend < 0.0) && (fabs(mTimeUntilSend) < mDt)) {
956 mTimeUntilSend = mDt + mTimeUntilSend;
958 mTimeUntilSend = mDt;
961 double sim_time = globals->get_sim_time_sec();
962 static double lastTime = 0.0;
964 // SG_LOG(SG_GENERAL, SG_INFO, "actual dt=" << sim_time - lastTime);
967 FlightProperties ifce;
969 // put together a motion info struct, you will get that later
970 // from FGInterface directly ...
971 FGExternalMotionData motionInfo;
973 // The current simulation time we need to update for,
974 // note that the simulation time is updated before calling all the
975 // update methods. Thus it contains the time intervals *end* time.
976 // The FDM is already run, so the states belong to that time.
977 motionInfo.time = sim_time;
978 motionInfo.lag = mDt;
980 // These are for now converted from lat/lon/alt and euler angles.
981 // But this should change in FGInterface ...
982 double lon = ifce.get_Longitude();
983 double lat = ifce.get_Latitude();
984 // first the aprioriate structure for the geodetic one
985 SGGeod geod = SGGeod::fromRadFt(lon, lat, ifce.get_Altitude());
986 // Convert to cartesion coordinate
987 motionInfo.position = SGVec3d::fromGeod(geod);
989 // The quaternion rotating from the earth centered frame to the
990 // horizontal local frame
991 SGQuatf qEc2Hl = SGQuatf::fromLonLatRad((float)lon, (float)lat);
992 // The orientation wrt the horizontal local frame
993 float heading = ifce.get_Psi();
994 float pitch = ifce.get_Theta();
995 float roll = ifce.get_Phi();
996 SGQuatf hlOr = SGQuatf::fromYawPitchRoll(heading, pitch, roll);
997 // The orientation of the vehicle wrt the earth centered frame
998 motionInfo.orientation = qEc2Hl*hlOr;
1000 if (!globals->get_subsystem("flight")->is_suspended()) {
1002 motionInfo.linearVel = SG_FEET_TO_METER*SGVec3f(ifce.get_uBody(),
1005 motionInfo.angularVel = SGVec3f(ifce.get_P_body(),
1009 // accels, set that to zero for now.
1010 // Angular accelerations are missing from the interface anyway,
1011 // linear accelerations are screwed up at least for JSBSim.
1012 // motionInfo.linearAccel = SG_FEET_TO_METER*SGVec3f(ifce.get_U_dot_body(),
1013 // ifce.get_V_dot_body(),
1014 // ifce.get_W_dot_body());
1015 motionInfo.linearAccel = SGVec3f::zeros();
1016 motionInfo.angularAccel = SGVec3f::zeros();
1018 // if the interface is suspendend, prevent the client from
1019 // wild extrapolations
1020 motionInfo.linearVel = SGVec3f::zeros();
1021 motionInfo.angularVel = SGVec3f::zeros();
1022 motionInfo.linearAccel = SGVec3f::zeros();
1023 motionInfo.angularAccel = SGVec3f::zeros();
1026 // now send the properties
1027 PropertyMap::iterator it;
1028 for (it = mPropertyMap.begin(); it != mPropertyMap.end(); ++it) {
1029 FGPropertyData* pData = new FGPropertyData;
1030 pData->id = it->first;
1031 pData->type = it->second->getType();
1033 switch (pData->type) {
1037 pData->int_value = it->second->getIntValue();
1041 pData->float_value = it->second->getFloatValue();
1044 case props::UNSPECIFIED:
1046 // FIXME: We assume unspecified are strings for the moment.
1048 const char* cstr = it->second->getStringValue();
1049 int len = strlen(cstr);
1053 pData->string_value = new char[len + 1];
1054 strcpy(pData->string_value, cstr);
1059 pData->string_value = 0;
1062 //cout << " Sending property " << pData->id << " " << pData->type << " " << pData->string_value << "\n";
1066 // FIXME Currently default to a float.
1067 //cout << "Unknown type when iterating through props: " << pData->type << "\n";
1068 pData->float_value = it->second->getFloatValue();
1072 motionInfo.properties.push_back(pData);
1075 SendMyPosition(motionInfo);
1079 //////////////////////////////////////////////////////////////////////
1081 // handle a position message
1083 //////////////////////////////////////////////////////////////////////
1085 FGMultiplayMgr::ProcessPosMsg(const FGMultiplayMgr::MsgBuf& Msg,
1086 const simgear::IPAddress& SenderAddress, long stamp)
1088 const T_MsgHdr* MsgHdr = Msg.msgHdr();
1089 if (MsgHdr->MsgLen < sizeof(T_MsgHdr) + sizeof(T_PositionMsg)) {
1090 SG_LOG( SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::MP_ProcessData - "
1091 << "Position message received with insufficient data" );
1094 const T_PositionMsg* PosMsg = Msg.posMsg();
1095 FGExternalMotionData motionInfo;
1096 motionInfo.time = XDR_decode_double(PosMsg->time);
1097 motionInfo.lag = XDR_decode_double(PosMsg->lag);
1098 for (unsigned i = 0; i < 3; ++i)
1099 motionInfo.position(i) = XDR_decode_double(PosMsg->position[i]);
1101 for (unsigned i = 0; i < 3; ++i)
1102 angleAxis(i) = XDR_decode_float(PosMsg->orientation[i]);
1103 motionInfo.orientation = SGQuatf::fromAngleAxis(angleAxis);
1104 for (unsigned i = 0; i < 3; ++i)
1105 motionInfo.linearVel(i) = XDR_decode_float(PosMsg->linearVel[i]);
1106 for (unsigned i = 0; i < 3; ++i)
1107 motionInfo.angularVel(i) = XDR_decode_float(PosMsg->angularVel[i]);
1108 for (unsigned i = 0; i < 3; ++i)
1109 motionInfo.linearAccel(i) = XDR_decode_float(PosMsg->linearAccel[i]);
1110 for (unsigned i = 0; i < 3; ++i)
1111 motionInfo.angularAccel(i) = XDR_decode_float(PosMsg->angularAccel[i]);
1113 // sanity check: do not allow injection of corrupted data (NaNs)
1114 if (!isSane(motionInfo))
1116 // drop this message, keep old position until receiving valid data
1117 SG_LOG(SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::ProcessPosMsg - "
1118 << "Position message with invalid data (NaN) received from "
1119 << MsgHdr->Callsign);
1123 //cout << "INPUT MESSAGE\n";
1125 // There was a bug in 1.9.0 and before: T_PositionMsg was 196 bytes
1126 // on 32 bit architectures and 200 bytes on 64 bit, and this
1127 // structure is put directly on the wire. By looking at the padding,
1128 // we can sort through the mess, mostly:
1129 // If padding is 0 (which is not a valid property type), then the
1130 // message was produced by a new client or an old 64 bit client that
1131 // happened to have 0 on the stack;
1132 // Else if the property list starting with the padding word is
1133 // well-formed, then the client is probably an old 32 bit client and
1134 // we'll go with that;
1135 // Else it is an old 64-bit client and properties start after the
1137 // There is a chance that we could be fooled by garbage in the
1138 // padding looking like a valid property, so verifyProperties() is
1139 // strict about the validity of the property values.
1140 const xdr_data_t* xdr = Msg.properties();
1141 if (PosMsg->pad != 0) {
1142 if (verifyProperties(&PosMsg->pad, Msg.propsRecvdEnd()))
1144 else if (!verifyProperties(xdr, Msg.propsRecvdEnd()))
1147 while (xdr < Msg.propsRecvdEnd()) {
1148 // simgear::props::Type type = simgear::props::UNSPECIFIED;
1150 // First element is always the ID
1151 unsigned id = XDR_decode_uint32(*xdr);
1152 //cout << pData->id << " ";
1155 // Check the ID actually exists and get the type
1156 const IdPropertyList* plist = findProperty(id);
1160 FGPropertyData* pData = new FGPropertyData;
1162 pData->type = plist->type;
1163 // How we decode the remainder of the property depends on the type
1164 switch (pData->type) {
1165 case simgear::props::INT:
1166 case simgear::props::BOOL:
1167 case simgear::props::LONG:
1168 pData->int_value = XDR_decode_uint32(*xdr);
1170 //cout << pData->int_value << "\n";
1172 case simgear::props::FLOAT:
1173 case simgear::props::DOUBLE:
1174 pData->float_value = XDR_decode_float(*xdr);
1176 //cout << pData->float_value << "\n";
1178 case simgear::props::STRING:
1179 case simgear::props::UNSPECIFIED:
1181 // String is complicated. It consists of
1182 // The length of the string
1183 // The string itself
1184 // Padding to the nearest 4-bytes.
1185 uint32_t length = XDR_decode_uint32(*xdr);
1187 //cout << length << " ";
1188 // Old versions truncated the string but left the length unadjusted.
1189 if (length > MAX_TEXT_SIZE)
1190 length = MAX_TEXT_SIZE;
1191 pData->string_value = new char[length + 1];
1192 //cout << " String: ";
1193 for (unsigned i = 0; i < length; i++)
1195 pData->string_value[i] = (char) XDR_decode_int8(*xdr);
1197 //cout << pData->string_value[i];
1200 pData->string_value[length] = '\0';
1202 // Now handle the padding
1203 while ((length % 4) != 0)
1214 pData->float_value = XDR_decode_float(*xdr);
1215 SG_LOG(SG_NETWORK, SG_DEBUG, "Unknown Prop type " << pData->id << " " << pData->type);
1220 motionInfo.properties.push_back(pData);
1224 // We failed to find the property. We'll try the next packet immediately.
1225 SG_LOG(SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::ProcessPosMsg - "
1226 "message from " << MsgHdr->Callsign << " has unknown property id "
1231 FGAIMultiplayer* mp = getMultiplayer(MsgHdr->Callsign);
1233 mp = addMultiplayer(MsgHdr->Callsign, PosMsg->Model);
1234 mp->addMotionInfo(motionInfo, stamp);
1235 } // FGMultiplayMgr::ProcessPosMsg()
1236 //////////////////////////////////////////////////////////////////////
1238 //////////////////////////////////////////////////////////////////////
1240 // handle a chat message
1241 // FIXME: display chat message within flightgear
1243 //////////////////////////////////////////////////////////////////////
1245 FGMultiplayMgr::ProcessChatMsg(const MsgBuf& Msg,
1246 const simgear::IPAddress& SenderAddress)
1248 const T_MsgHdr* MsgHdr = Msg.msgHdr();
1249 if (MsgHdr->MsgLen < sizeof(T_MsgHdr) + 1) {
1250 SG_LOG( SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::MP_ProcessData - "
1251 << "Chat message received with insufficient data" );
1255 char *chatStr = new char[MsgHdr->MsgLen - sizeof(T_MsgHdr)];
1256 const T_ChatMsg* ChatMsg
1257 = reinterpret_cast<const T_ChatMsg *>(Msg.Msg + sizeof(T_MsgHdr));
1258 strncpy(chatStr, ChatMsg->Text,
1259 MsgHdr->MsgLen - sizeof(T_MsgHdr));
1260 chatStr[MsgHdr->MsgLen - sizeof(T_MsgHdr) - 1] = '\0';
1262 SG_LOG (SG_NETWORK, SG_WARN, "Chat [" << MsgHdr->Callsign << "]"
1266 } // FGMultiplayMgr::ProcessChatMsg ()
1267 //////////////////////////////////////////////////////////////////////
1270 FGMultiplayMgr::FillMsgHdr(T_MsgHdr *MsgHdr, int MsgId, unsigned _len)
1275 len = sizeof(T_MsgHdr) + sizeof(T_ChatMsg);
1281 len = sizeof(T_MsgHdr);
1284 MsgHdr->Magic = XDR_encode_uint32(MSG_MAGIC);
1285 MsgHdr->Version = XDR_encode_uint32(PROTO_VER);
1286 MsgHdr->MsgId = XDR_encode_uint32(MsgId);
1287 MsgHdr->MsgLen = XDR_encode_uint32(len);
1288 MsgHdr->ReplyAddress = 0; // Are obsolete, keep them for the server for
1289 MsgHdr->ReplyPort = 0; // now
1290 strncpy(MsgHdr->Callsign, mCallsign.c_str(), MAX_CALLSIGN_LEN);
1291 MsgHdr->Callsign[MAX_CALLSIGN_LEN - 1] = '\0';
1295 FGMultiplayMgr::addMultiplayer(const std::string& callsign,
1296 const std::string& modelName)
1298 if (0 < mMultiPlayerMap.count(callsign))
1299 return mMultiPlayerMap[callsign].get();
1301 FGAIMultiplayer* mp = new FGAIMultiplayer;
1302 mp->setPath(modelName.c_str());
1303 mp->setCallSign(callsign);
1304 mMultiPlayerMap[callsign] = mp;
1306 FGAIManager *aiMgr = (FGAIManager*)globals->get_subsystem("ai_model");
1310 /// FIXME: that must follow the attach ATM ...
1311 for (unsigned i = 0; i < numProperties; ++i)
1312 mp->addPropertyId(sIdPropertyList[i].id, sIdPropertyList[i].name);
1319 FGMultiplayMgr::getMultiplayer(const std::string& callsign)
1321 if (0 < mMultiPlayerMap.count(callsign))
1322 return mMultiPlayerMap[callsign].get();
1328 FGMultiplayMgr::findProperties()
1330 if (!mPropertiesChanged) {
1334 mPropertiesChanged = false;
1336 for (unsigned i = 0; i < numProperties; ++i) {
1337 const char* name = sIdPropertyList[i].name;
1338 SGPropertyNode* pNode = globals->get_props()->getNode(name);
1343 int id = sIdPropertyList[i].id;
1344 if (mPropertyMap.find(id) != mPropertyMap.end()) {
1345 continue; // already activated
1348 mPropertyMap[id] = pNode;
1349 SG_LOG(SG_NETWORK, SG_DEBUG, "activating MP property:" << pNode->getPath());