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 //////////////////////////////////////////////////////////////////////
36 #include <osg/Math> // isNaN
37 #include <plib/netSocket.h>
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 <Main/fg_props.hxx>
46 #include "multiplaymgr.hxx"
47 #include "mpmessages.hxx"
51 #define MAX_PACKET_SIZE 1200
52 #define MAX_TEXT_SIZE 128
54 // These constants are provided so that the ident
55 // command can list file versions
56 const char sMULTIPLAYMGR_BID[] = "$Id$";
57 const char sMULTIPLAYMGR_HID[] = MULTIPLAYTXMGR_HID;
59 // A static map of protocol property id values to property paths,
60 // This should be extendable dynamically for every specific aircraft ...
61 // For now only that static list
62 FGMultiplayMgr::IdPropertyList
63 const FGMultiplayMgr::sIdPropertyList[] = {
64 {100, "surface-positions/left-aileron-pos-norm", SGPropertyNode::FLOAT},
65 {101, "surface-positions/right-aileron-pos-norm", SGPropertyNode::FLOAT},
66 {102, "surface-positions/elevator-pos-norm", SGPropertyNode::FLOAT},
67 {103, "surface-positions/rudder-pos-norm", SGPropertyNode::FLOAT},
68 {104, "surface-positions/flap-pos-norm", SGPropertyNode::FLOAT},
69 {105, "surface-positions/speedbrake-pos-norm", SGPropertyNode::FLOAT},
70 {106, "gear/tailhook/position-norm", SGPropertyNode::FLOAT},
71 {107, "gear/launchbar/position-norm", SGPropertyNode::FLOAT},
72 {108, "gear/launchbar/state", SGPropertyNode::STRING},
73 {109, "gear/launchbar/holdback-position-norm", SGPropertyNode::FLOAT},
74 {110, "canopy/position-norm", SGPropertyNode::FLOAT},
75 {111, "surface-positions/wing-pos-norm", SGPropertyNode::FLOAT},
76 {112, "surface-positions/wing-fold-pos-norm", SGPropertyNode::FLOAT},
78 {200, "gear/gear[0]/compression-norm", SGPropertyNode::FLOAT},
79 {201, "gear/gear[0]/position-norm", SGPropertyNode::FLOAT},
80 {210, "gear/gear[1]/compression-norm", SGPropertyNode::FLOAT},
81 {211, "gear/gear[1]/position-norm", SGPropertyNode::FLOAT},
82 {220, "gear/gear[2]/compression-norm", SGPropertyNode::FLOAT},
83 {221, "gear/gear[2]/position-norm", SGPropertyNode::FLOAT},
84 {230, "gear/gear[3]/compression-norm", SGPropertyNode::FLOAT},
85 {231, "gear/gear[3]/position-norm", SGPropertyNode::FLOAT},
86 {240, "gear/gear[4]/compression-norm", SGPropertyNode::FLOAT},
87 {241, "gear/gear[4]/position-norm", SGPropertyNode::FLOAT},
89 {300, "engines/engine[0]/n1", SGPropertyNode::FLOAT},
90 {301, "engines/engine[0]/n2", SGPropertyNode::FLOAT},
91 {302, "engines/engine[0]/rpm", SGPropertyNode::FLOAT},
92 {310, "engines/engine[1]/n1", SGPropertyNode::FLOAT},
93 {311, "engines/engine[1]/n2", SGPropertyNode::FLOAT},
94 {312, "engines/engine[1]/rpm", SGPropertyNode::FLOAT},
95 {320, "engines/engine[2]/n1", SGPropertyNode::FLOAT},
96 {321, "engines/engine[2]/n2", SGPropertyNode::FLOAT},
97 {322, "engines/engine[2]/rpm", SGPropertyNode::FLOAT},
98 {330, "engines/engine[3]/n1", SGPropertyNode::FLOAT},
99 {331, "engines/engine[3]/n2", SGPropertyNode::FLOAT},
100 {332, "engines/engine[3]/rpm", SGPropertyNode::FLOAT},
101 {340, "engines/engine[4]/n1", SGPropertyNode::FLOAT},
102 {341, "engines/engine[4]/n2", SGPropertyNode::FLOAT},
103 {342, "engines/engine[4]/rpm", SGPropertyNode::FLOAT},
104 {350, "engines/engine[5]/n1", SGPropertyNode::FLOAT},
105 {351, "engines/engine[5]/n2", SGPropertyNode::FLOAT},
106 {352, "engines/engine[5]/rpm", SGPropertyNode::FLOAT},
107 {360, "engines/engine[6]/n1", SGPropertyNode::FLOAT},
108 {361, "engines/engine[6]/n2", SGPropertyNode::FLOAT},
109 {362, "engines/engine[6]/rpm", SGPropertyNode::FLOAT},
110 {370, "engines/engine[7]/n1", SGPropertyNode::FLOAT},
111 {371, "engines/engine[7]/n2", SGPropertyNode::FLOAT},
112 {372, "engines/engine[7]/rpm", SGPropertyNode::FLOAT},
113 {380, "engines/engine[8]/n1", SGPropertyNode::FLOAT},
114 {381, "engines/engine[8]/n2", SGPropertyNode::FLOAT},
115 {382, "engines/engine[8]/rpm", SGPropertyNode::FLOAT},
116 {390, "engines/engine[9]/n1", SGPropertyNode::FLOAT},
117 {391, "engines/engine[9]/n2", SGPropertyNode::FLOAT},
118 {392, "engines/engine[9]/rpm", SGPropertyNode::FLOAT},
120 {800, "rotors/main/rpm", SGPropertyNode::FLOAT},
121 {801, "rotors/tail/rpm", SGPropertyNode::FLOAT},
122 {810, "rotors/main/blade[0]/position-deg", SGPropertyNode::FLOAT},
123 {811, "rotors/main/blade[1]/position-deg", SGPropertyNode::FLOAT},
124 {812, "rotors/main/blade[2]/position-deg", SGPropertyNode::FLOAT},
125 {813, "rotors/main/blade[3]/position-deg", SGPropertyNode::FLOAT},
126 {820, "rotors/main/blade[0]/flap-deg", SGPropertyNode::FLOAT},
127 {821, "rotors/main/blade[1]/flap-deg", SGPropertyNode::FLOAT},
128 {822, "rotors/main/blade[2]/flap-deg", SGPropertyNode::FLOAT},
129 {823, "rotors/main/blade[3]/flap-deg", SGPropertyNode::FLOAT},
130 {830, "rotors/tail/blade[0]/position-deg", SGPropertyNode::FLOAT},
131 {831, "rotors/tail/blade[1]/position-deg", SGPropertyNode::FLOAT},
133 {900, "sim/hitches/aerotow/tow/length", SGPropertyNode::FLOAT},
134 {901, "sim/hitches/aerotow/tow/elastic-constant", SGPropertyNode::FLOAT},
135 {902, "sim/hitches/aerotow/tow/weight-per-m-kg-m", SGPropertyNode::FLOAT},
136 {903, "sim/hitches/aerotow/tow/dist", SGPropertyNode::FLOAT},
137 {904, "sim/hitches/aerotow/tow/connected-to-property-node", SGPropertyNode::BOOL},
138 {905, "sim/hitches/aerotow/tow/connected-to-ai-or-mp-callsign", SGPropertyNode::STRING},
139 {906, "sim/hitches/aerotow/tow/brake-force", SGPropertyNode::FLOAT},
140 {907, "sim/hitches/aerotow/tow/end-force-x", SGPropertyNode::FLOAT},
141 {908, "sim/hitches/aerotow/tow/end-force-y", SGPropertyNode::FLOAT},
142 {909, "sim/hitches/aerotow/tow/end-force-z", SGPropertyNode::FLOAT},
143 {930, "sim/hitches/aerotow/is-slave", SGPropertyNode::BOOL},
144 {931, "sim/hitches/aerotow/speed-in-tow-direction", SGPropertyNode::FLOAT},
145 {932, "sim/hitches/aerotow/open", SGPropertyNode::BOOL},
146 {933, "sim/hitches/aerotow/local-pos-x", SGPropertyNode::FLOAT},
147 {934, "sim/hitches/aerotow/local-pos-y", SGPropertyNode::FLOAT},
148 {935, "sim/hitches/aerotow/local-pos-z", SGPropertyNode::FLOAT},
150 {1001, "controls/flight/slats", SGPropertyNode::FLOAT},
151 {1002, "controls/flight/speedbrake", SGPropertyNode::FLOAT},
152 {1003, "controls/flight/spoilers", SGPropertyNode::FLOAT},
153 {1004, "controls/gear/gear-down", SGPropertyNode::FLOAT},
154 {1005, "controls/lighting/nav-lights", SGPropertyNode::FLOAT},
155 {1006, "controls/armament/station[0]/jettison-all", SGPropertyNode::BOOL},
157 {1100, "sim/model/variant", SGPropertyNode::INT},
158 {1101, "sim/model/livery/file", SGPropertyNode::STRING},
160 {10001, "sim/multiplay/transmission-freq-hz", SGPropertyNode::STRING},
161 {10002, "sim/multiplay/chat", SGPropertyNode::STRING},
163 {10100, "sim/multiplay/generic/string[0]", SGPropertyNode::STRING},
164 {10101, "sim/multiplay/generic/string[1]", SGPropertyNode::STRING},
165 {10102, "sim/multiplay/generic/string[2]", SGPropertyNode::STRING},
166 {10103, "sim/multiplay/generic/string[3]", SGPropertyNode::STRING},
167 {10104, "sim/multiplay/generic/string[4]", SGPropertyNode::STRING},
168 {10105, "sim/multiplay/generic/string[5]", SGPropertyNode::STRING},
169 {10106, "sim/multiplay/generic/string[6]", SGPropertyNode::STRING},
170 {10107, "sim/multiplay/generic/string[7]", SGPropertyNode::STRING},
171 {10108, "sim/multiplay/generic/string[8]", SGPropertyNode::STRING},
172 {10109, "sim/multiplay/generic/string[9]", SGPropertyNode::STRING},
173 {10110, "sim/multiplay/generic/string[10]", SGPropertyNode::STRING},
174 {10111, "sim/multiplay/generic/string[11]", SGPropertyNode::STRING},
175 {10112, "sim/multiplay/generic/string[12]", SGPropertyNode::STRING},
176 {10113, "sim/multiplay/generic/string[13]", SGPropertyNode::STRING},
177 {10114, "sim/multiplay/generic/string[14]", SGPropertyNode::STRING},
178 {10115, "sim/multiplay/generic/string[15]", SGPropertyNode::STRING},
179 {10116, "sim/multiplay/generic/string[16]", SGPropertyNode::STRING},
180 {10117, "sim/multiplay/generic/string[17]", SGPropertyNode::STRING},
181 {10118, "sim/multiplay/generic/string[18]", SGPropertyNode::STRING},
182 {10119, "sim/multiplay/generic/string[19]", SGPropertyNode::STRING},
184 {10200, "sim/multiplay/generic/float[0]", SGPropertyNode::FLOAT},
185 {10201, "sim/multiplay/generic/float[1]", SGPropertyNode::FLOAT},
186 {10202, "sim/multiplay/generic/float[2]", SGPropertyNode::FLOAT},
187 {10203, "sim/multiplay/generic/float[3]", SGPropertyNode::FLOAT},
188 {10204, "sim/multiplay/generic/float[4]", SGPropertyNode::FLOAT},
189 {10205, "sim/multiplay/generic/float[5]", SGPropertyNode::FLOAT},
190 {10206, "sim/multiplay/generic/float[6]", SGPropertyNode::FLOAT},
191 {10207, "sim/multiplay/generic/float[7]", SGPropertyNode::FLOAT},
192 {10208, "sim/multiplay/generic/float[8]", SGPropertyNode::FLOAT},
193 {10209, "sim/multiplay/generic/float[9]", SGPropertyNode::FLOAT},
194 {10210, "sim/multiplay/generic/float[10]", SGPropertyNode::FLOAT},
195 {10211, "sim/multiplay/generic/float[11]", SGPropertyNode::FLOAT},
196 {10212, "sim/multiplay/generic/float[12]", SGPropertyNode::FLOAT},
197 {10213, "sim/multiplay/generic/float[13]", SGPropertyNode::FLOAT},
198 {10214, "sim/multiplay/generic/float[14]", SGPropertyNode::FLOAT},
199 {10215, "sim/multiplay/generic/float[15]", SGPropertyNode::FLOAT},
200 {10216, "sim/multiplay/generic/float[16]", SGPropertyNode::FLOAT},
201 {10217, "sim/multiplay/generic/float[17]", SGPropertyNode::FLOAT},
202 {10218, "sim/multiplay/generic/float[18]", SGPropertyNode::FLOAT},
203 {10219, "sim/multiplay/generic/float[19]", SGPropertyNode::FLOAT},
205 {10300, "sim/multiplay/generic/int[0]", SGPropertyNode::INT},
206 {10301, "sim/multiplay/generic/int[1]", SGPropertyNode::INT},
207 {10302, "sim/multiplay/generic/int[2]", SGPropertyNode::INT},
208 {10303, "sim/multiplay/generic/int[3]", SGPropertyNode::INT},
209 {10304, "sim/multiplay/generic/int[4]", SGPropertyNode::INT},
210 {10305, "sim/multiplay/generic/int[5]", SGPropertyNode::INT},
211 {10306, "sim/multiplay/generic/int[6]", SGPropertyNode::INT},
212 {10307, "sim/multiplay/generic/int[7]", SGPropertyNode::INT},
213 {10308, "sim/multiplay/generic/int[8]", SGPropertyNode::INT},
214 {10309, "sim/multiplay/generic/int[9]", SGPropertyNode::INT},
215 {10310, "sim/multiplay/generic/int[10]", SGPropertyNode::INT},
216 {10311, "sim/multiplay/generic/int[11]", SGPropertyNode::INT},
217 {10312, "sim/multiplay/generic/int[12]", SGPropertyNode::INT},
218 {10313, "sim/multiplay/generic/int[13]", SGPropertyNode::INT},
219 {10314, "sim/multiplay/generic/int[14]", SGPropertyNode::INT},
220 {10315, "sim/multiplay/generic/int[15]", SGPropertyNode::INT},
221 {10316, "sim/multiplay/generic/int[16]", SGPropertyNode::INT},
222 {10317, "sim/multiplay/generic/int[17]", SGPropertyNode::INT},
223 {10318, "sim/multiplay/generic/int[18]", SGPropertyNode::INT},
224 {10319, "sim/multiplay/generic/int[19]", SGPropertyNode::INT},
228 FGMultiplayMgr::numProperties = (sizeof(FGMultiplayMgr::sIdPropertyList)
229 / sizeof(FGMultiplayMgr::sIdPropertyList[0]));
231 // Look up a property ID using binary search.
234 struct ComparePropertyId
236 bool operator()(const FGMultiplayMgr::IdPropertyList& lhs,
237 const FGMultiplayMgr::IdPropertyList& rhs)
239 return lhs.id < rhs.id;
241 bool operator()(const FGMultiplayMgr::IdPropertyList& lhs,
246 bool operator()(unsigned id,
247 const FGMultiplayMgr::IdPropertyList& rhs)
254 const FGMultiplayMgr::IdPropertyList* FGMultiplayMgr::findProperty(unsigned id)
256 std::pair<const IdPropertyList*, const IdPropertyList*> result
257 = std::equal_range(sIdPropertyList, sIdPropertyList + numProperties, id,
258 ComparePropertyId());
259 if (result.first == result.second) {
268 bool verifyProperties(const xdr_data_t* data, const xdr_data_t* end)
270 const xdr_data_t* xdr = data;
272 unsigned id = XDR_decode_uint32(*xdr);
273 const FGMultiplayMgr::IdPropertyList* plist
274 = FGMultiplayMgr::findProperty(id);
278 // How we decode the remainder of the property depends on the type
279 switch (plist->type) {
280 case SGPropertyNode::INT:
281 case SGPropertyNode::BOOL:
282 case SGPropertyNode::LONG:
285 case SGPropertyNode::FLOAT:
286 case SGPropertyNode::DOUBLE:
288 float val = XDR_decode_float(*xdr);
294 case SGPropertyNode::STRING:
295 case SGPropertyNode::UNSPECIFIED:
297 // String is complicated. It consists of
298 // The length of the string
300 // Padding to the nearest 4-bytes.
301 // XXX Yes, each byte is padded out to a word! Too late
303 uint32_t length = XDR_decode_uint32(*xdr);
305 if ((length > 0) && (length < MAX_TEXT_SIZE)) {
307 // Now handle the padding
308 while ((length % 4) != 0)
315 // The string appears to be invalid; bail.
321 // cerr << "Unknown Prop type " << id << " " << type << "\n";
327 // give up; this is a malformed property list.
334 //////////////////////////////////////////////////////////////////////
336 // MultiplayMgr constructor
338 //////////////////////////////////////////////////////////////////////
339 FGMultiplayMgr::FGMultiplayMgr()
342 mInitialised = false;
344 } // FGMultiplayMgr::FGMultiplayMgr()
345 //////////////////////////////////////////////////////////////////////
347 //////////////////////////////////////////////////////////////////////
349 // MultiplayMgr destructor
351 //////////////////////////////////////////////////////////////////////
352 FGMultiplayMgr::~FGMultiplayMgr()
355 } // FGMultiplayMgr::~FGMultiplayMgr()
356 //////////////////////////////////////////////////////////////////////
358 //////////////////////////////////////////////////////////////////////
362 //////////////////////////////////////////////////////////////////////
364 FGMultiplayMgr::init (void)
366 //////////////////////////////////////////////////
367 // Initialise object if not already done
368 //////////////////////////////////////////////////
370 SG_LOG(SG_NETWORK, SG_WARN, "FGMultiplayMgr::init - already initialised");
373 //////////////////////////////////////////////////
374 // Set members from property values
375 //////////////////////////////////////////////////
376 short rxPort = fgGetInt("/sim/multiplay/rxport");
377 string rxAddress = fgGetString("/sim/multiplay/rxhost");
378 short txPort = fgGetInt("/sim/multiplay/txport");
379 string txAddress = fgGetString("/sim/multiplay/txhost");
380 mCallsign = fgGetString("/sim/multiplay/callsign");
381 if (txPort > 0 && !txAddress.empty()) {
382 mServer.set(txAddress.c_str(), txPort);
383 if (strncmp (mServer.getHost(), "0.0.0.0", 8) == 0) {
385 SG_LOG(SG_NETWORK, SG_ALERT,
386 "FGMultiplayMgr - could not resolve '"
387 << txAddress << "', Multiplayermode disabled");
395 SG_LOG(SG_NETWORK, SG_ALERT,
396 "FGMultiplayMgr - No receiver port, Multiplayermode disabled");
399 if (mCallsign.empty())
400 mCallsign = "JohnDoe"; // FIXME: use getpwuid
401 SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-txaddress= "<<txAddress);
402 SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-txport= "<<txPort );
403 SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-rxaddress="<<rxAddress );
404 SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-rxport= "<<rxPort);
405 SG_LOG(SG_NETWORK,SG_INFO,"FGMultiplayMgr::init-callsign= "<<mCallsign);
406 Close(); // Should Init be called twice, close Socket first
407 // A memory leak was reported here by valgrind
408 mSocket = new netSocket();
409 if (!mSocket->open(false)) {
410 SG_LOG( SG_NETWORK, SG_ALERT,
411 "FGMultiplayMgr::init - Failed to create data socket" );
414 mSocket->setBlocking(false);
415 if (mSocket->bind(rxAddress.c_str(), rxPort) != 0) {
417 SG_LOG( SG_NETWORK, SG_ALERT,
418 "FGMultiplayMgr::Open - Failed to bind receive socket" );
423 } // FGMultiplayMgr::init()
424 //////////////////////////////////////////////////////////////////////
426 //////////////////////////////////////////////////////////////////////
428 // Closes and deletes the local player object. Closes
429 // and deletes the tx socket. Resets the object state to unitialised.
431 //////////////////////////////////////////////////////////////////////
433 FGMultiplayMgr::Close (void)
435 mMultiPlayerMap.clear();
442 mInitialised = false;
443 } // FGMultiplayMgr::Close(void)
444 //////////////////////////////////////////////////////////////////////
446 //////////////////////////////////////////////////////////////////////
448 // Description: Sends the position data for the local position.
450 //////////////////////////////////////////////////////////////////////
452 FGMultiplayMgr::SendMyPosition(const FGExternalMotionData& motionInfo)
454 if ((! mInitialised) || (! mHaveServer))
457 SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::SendMyPosition - no server");
461 T_PositionMsg PosMsg;
463 memset(&PosMsg, 0, sizeof(PosMsg));
464 strncpy(PosMsg.Model, fgGetString("/sim/model/path"), MAX_MODEL_NAME_LEN);
465 PosMsg.Model[MAX_MODEL_NAME_LEN - 1] = '\0';
467 PosMsg.time = XDR_encode_double (motionInfo.time);
468 PosMsg.lag = XDR_encode_double (motionInfo.lag);
469 for (unsigned i = 0 ; i < 3; ++i)
470 PosMsg.position[i] = XDR_encode_double (motionInfo.position(i));
472 motionInfo.orientation.getAngleAxis(angleAxis);
473 for (unsigned i = 0 ; i < 3; ++i)
474 PosMsg.orientation[i] = XDR_encode_float (angleAxis(i));
475 for (unsigned i = 0 ; i < 3; ++i)
476 PosMsg.linearVel[i] = XDR_encode_float (motionInfo.linearVel(i));
477 for (unsigned i = 0 ; i < 3; ++i)
478 PosMsg.angularVel[i] = XDR_encode_float (motionInfo.angularVel(i));
479 for (unsigned i = 0 ; i < 3; ++i)
480 PosMsg.linearAccel[i] = XDR_encode_float (motionInfo.linearAccel(i));
481 for (unsigned i = 0 ; i < 3; ++i)
482 PosMsg.angularAccel[i] = XDR_encode_float (motionInfo.angularAccel(i));
484 char Msg[MAX_PACKET_SIZE];
485 memcpy(Msg + sizeof(T_MsgHdr), &PosMsg, sizeof(T_PositionMsg));
487 char* ptr = Msg + sizeof(T_MsgHdr) + sizeof(T_PositionMsg);
488 std::vector<FGPropertyData*>::const_iterator it;
489 it = motionInfo.properties.begin();
490 //cout << "OUTPUT PROPERTIES\n";
491 while (it != motionInfo.properties.end()
492 && ptr + 2 * sizeof(xdr_data_t) < (Msg + MAX_PACKET_SIZE)) {
494 // First elements is the ID
495 xdr_data_t xdr = XDR_encode_uint32((*it)->id);
496 memcpy(ptr, &xdr, sizeof(xdr_data_t));
497 ptr += sizeof(xdr_data_t);
499 // The actual data representation depends on the type
500 switch ((*it)->type) {
501 case SGPropertyNode::INT:
502 case SGPropertyNode::BOOL:
503 case SGPropertyNode::LONG:
504 xdr = XDR_encode_uint32((*it)->int_value);
505 memcpy(ptr, &xdr, sizeof(xdr_data_t));
506 ptr += sizeof(xdr_data_t);
507 //cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->int_value << "\n";
509 case SGPropertyNode::FLOAT:
510 case SGPropertyNode::DOUBLE:
511 xdr = XDR_encode_float((*it)->float_value);;
512 memcpy(ptr, &xdr, sizeof(xdr_data_t));
513 ptr += sizeof(xdr_data_t);
514 //cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->float_value << "\n";
516 case SGPropertyNode::STRING:
517 case SGPropertyNode::UNSPECIFIED:
519 // String is complicated. It consists of
520 // The length of the string
522 // Padding to the nearest 4-bytes.
523 const char* lcharptr = (*it)->string_value;
528 ////cout << "String length: " << strlen(lcharptr) << "\n";
529 uint32_t len = strlen(lcharptr);
530 // XXX This should not be using 4 bytes per character!
531 if (ptr + (1 + len + (4 - len % 4)) * sizeof (xdr_data_t)
532 >= (Msg + MAX_PACKET_SIZE))
534 //cout << "String length unint32: " << len << "\n";
535 xdr = XDR_encode_uint32(len);
536 memcpy(ptr, &xdr, sizeof(xdr_data_t));
537 ptr += sizeof(xdr_data_t);
542 // Now the text itself
543 // XXX This should not be using 4 bytes per character!
545 while ((*lcharptr != '\0') && (lcount < MAX_TEXT_SIZE))
547 xdr = XDR_encode_int8(*lcharptr);
548 memcpy(ptr, &xdr, sizeof(xdr_data_t));
549 ptr += sizeof(xdr_data_t);
554 //cout << "Prop:" << (*it)->id << " " << (*it)->type << " " << len << " " << (*it)->string_value;
556 // Now pad if required
557 while ((lcount % 4) != 0)
559 xdr = XDR_encode_int8(0);
560 memcpy(ptr, &xdr, sizeof(xdr_data_t));
561 ptr += sizeof(xdr_data_t);
572 xdr = XDR_encode_uint32(0);
573 memcpy(ptr, &xdr, sizeof(xdr_data_t));
574 ptr += sizeof(xdr_data_t);
575 //cout << "Prop:" << (*it)->id << " " << (*it)->type << " 0\n";
582 //cout << " Unknown Type: " << (*it)->type << "\n";
583 xdr = XDR_encode_float((*it)->float_value);;
584 memcpy(ptr, &xdr, sizeof(xdr_data_t));
585 ptr += sizeof(xdr_data_t);
586 //cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->float_value << "\n";
595 FillMsgHdr(&MsgHdr, POS_DATA_ID, ptr - Msg);
596 memcpy(Msg, &MsgHdr, sizeof(T_MsgHdr));
598 mSocket->sendto(Msg, ptr - Msg, 0, &mServer);
599 SG_LOG(SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::SendMyPosition");
600 } // FGMultiplayMgr::SendMyPosition()
601 //////////////////////////////////////////////////////////////////////
603 //////////////////////////////////////////////////////////////////////
605 // Name: SendTextMessage
606 // Description: Sends a message to the player. The message must
607 // contain a valid and correctly filled out header and optional
610 //////////////////////////////////////////////////////////////////////
612 FGMultiplayMgr::SendTextMessage(const string &MsgText)
614 if (!mInitialised || !mHaveServer)
618 FillMsgHdr(&MsgHdr, CHAT_MSG_ID);
619 //////////////////////////////////////////////////
620 // Divide the text string into blocks that fit
621 // in the message and send the blocks.
622 //////////////////////////////////////////////////
623 unsigned iNextBlockPosition = 0;
626 char Msg[sizeof(T_MsgHdr) + sizeof(T_ChatMsg)];
627 while (iNextBlockPosition < MsgText.length()) {
628 strncpy (ChatMsg.Text,
629 MsgText.substr(iNextBlockPosition, MAX_CHAT_MSG_LEN - 1).c_str(),
631 ChatMsg.Text[MAX_CHAT_MSG_LEN - 1] = '\0';
632 memcpy (Msg, &MsgHdr, sizeof(T_MsgHdr));
633 memcpy (Msg + sizeof(T_MsgHdr), &ChatMsg, sizeof(T_ChatMsg));
634 mSocket->sendto (Msg, sizeof(T_MsgHdr) + sizeof(T_ChatMsg), 0, &mServer);
635 iNextBlockPosition += MAX_CHAT_MSG_LEN - 1;
640 } // FGMultiplayMgr::SendTextMessage ()
641 //////////////////////////////////////////////////////////////////////
643 //////////////////////////////////////////////////////////////////////
646 // Description: Processes data waiting at the receive socket. The
647 // processing ends when there is no more data at the socket.
649 //////////////////////////////////////////////////////////////////////
651 FGMultiplayMgr::Update(void)
657 SGTimeStamp timestamper;
659 long stamp = timestamper.get_seconds();
661 //////////////////////////////////////////////////
662 // Read the receive socket and process any data
663 //////////////////////////////////////////////////
666 char Msg[MAX_PACKET_SIZE];
667 //////////////////////////////////////////////////
668 // Although the recv call asks for
669 // MAX_PACKET_SIZE of data, the number of bytes
670 // returned will only be that of the next
671 // packet waiting to be processed.
672 //////////////////////////////////////////////////
673 netAddress SenderAddress;
674 bytes = mSocket->recvfrom(Msg, sizeof(Msg), 0, &SenderAddress);
675 //////////////////////////////////////////////////
677 //////////////////////////////////////////////////
679 if (errno != EAGAIN && errno != 0) // MSVC output "NoError" otherwise
680 perror("FGMultiplayMgr::MP_ProcessData");
683 if (bytes <= sizeof(T_MsgHdr)) {
684 SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
685 << "received message with insufficient data" );
688 //////////////////////////////////////////////////
690 //////////////////////////////////////////////////
691 T_MsgHdr* MsgHdr = (T_MsgHdr *)Msg;
692 MsgHdr->Magic = XDR_decode_uint32 (MsgHdr->Magic);
693 MsgHdr->Version = XDR_decode_uint32 (MsgHdr->Version);
694 MsgHdr->MsgId = XDR_decode_uint32 (MsgHdr->MsgId);
695 MsgHdr->MsgLen = XDR_decode_uint32 (MsgHdr->MsgLen);
696 MsgHdr->ReplyPort = XDR_decode_uint32 (MsgHdr->ReplyPort);
697 if (MsgHdr->Magic != MSG_MAGIC) {
698 SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
699 << "message has invalid magic number!" );
702 if (MsgHdr->Version != PROTO_VER) {
703 SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
704 << "message has invalid protocoll number!" );
707 if (MsgHdr->MsgLen != bytes) {
708 SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
709 << "message has invalid length!" );
712 //////////////////////////////////////////////////
714 //////////////////////////////////////////////////
715 switch (MsgHdr->MsgId) {
717 ProcessChatMsg(Msg, SenderAddress);
720 ProcessPosMsg(Msg, SenderAddress, bytes, stamp);
722 case UNUSABLE_POS_DATA_ID:
723 case OLD_OLD_POS_DATA_ID:
724 case OLD_PROP_MSG_ID:
725 case OLD_POS_DATA_ID:
728 SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
729 << "Unknown message Id received: " << MsgHdr->MsgId );
735 MultiPlayerMap::iterator it = mMultiPlayerMap.begin();
736 while (it != mMultiPlayerMap.end()) {
737 if (it->second->getLastTimestamp() + 10 < stamp) {
738 std::string name = it->first;
739 it->second->setDie(true);
740 mMultiPlayerMap.erase(it);
741 it = mMultiPlayerMap.upper_bound(name);
745 } // FGMultiplayMgr::ProcessData(void)
746 //////////////////////////////////////////////////////////////////////
748 //////////////////////////////////////////////////////////////////////
750 // handle a position message
752 //////////////////////////////////////////////////////////////////////
754 FGMultiplayMgr::ProcessPosMsg(const char *Msg, netAddress & SenderAddress,
755 unsigned len, long stamp)
757 T_MsgHdr* MsgHdr = (T_MsgHdr *)Msg;
758 if (MsgHdr->MsgLen < sizeof(T_MsgHdr) + sizeof(T_PositionMsg)) {
759 SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
760 << "Position message received with insufficient data" );
763 T_PositionMsg* PosMsg = (T_PositionMsg *)(Msg + sizeof(T_MsgHdr));
764 FGExternalMotionData motionInfo;
765 motionInfo.time = XDR_decode_double(PosMsg->time);
766 motionInfo.lag = XDR_decode_double(PosMsg->lag);
767 for (unsigned i = 0; i < 3; ++i)
768 motionInfo.position(i) = XDR_decode_double(PosMsg->position[i]);
770 for (unsigned i = 0; i < 3; ++i)
771 angleAxis(i) = XDR_decode_float(PosMsg->orientation[i]);
772 motionInfo.orientation = SGQuatf::fromAngleAxis(angleAxis);
773 for (unsigned i = 0; i < 3; ++i)
774 motionInfo.linearVel(i) = XDR_decode_float(PosMsg->linearVel[i]);
775 for (unsigned i = 0; i < 3; ++i)
776 motionInfo.angularVel(i) = XDR_decode_float(PosMsg->angularVel[i]);
777 for (unsigned i = 0; i < 3; ++i)
778 motionInfo.linearAccel(i) = XDR_decode_float(PosMsg->linearAccel[i]);
779 for (unsigned i = 0; i < 3; ++i)
780 motionInfo.angularAccel(i) = XDR_decode_float(PosMsg->angularAccel[i]);
783 //cout << "INPUT MESSAGE\n";
784 xdr_data_t* xdr = (xdr_data_t*)
785 (Msg + sizeof(T_MsgHdr) + sizeof(T_PositionMsg));
786 // There was a bug in 1.9.0 and before: T_PositionMsg was 196 bytes
787 // on 32 bit architectures and 200 bytes on 64 bit, and this
788 // structure is put directly on the wire. By looking at the padding,
789 // we can sort through the mess, mostly:
790 // If padding is 0 (which is not a valid property type), then the
791 // message was produced by a new client or an old 64 bit client that
792 // happened to have 0 on the stack;
793 // Else if the property list starting with the padding word is
794 // well-formed, then the client is probably an old 32 bit client and
795 // we'll go with that;
796 // Else it is an old 64-bit client and properties start after the
798 // There is a chance that we could be fooled by garbage in the
799 // padding looking like a valid property, so verifyProperties() is
800 // strict about the validity of the property values.
801 if (PosMsg->pad != 0) {
802 if (verifyProperties(&PosMsg->pad,
803 reinterpret_cast<const xdr_data_t*>(Msg + len)))
805 else if (!verifyProperties(xdr,
806 reinterpret_cast<const xdr_data_t*>(Msg + len)))
809 while ((char*)xdr < Msg + len) {
810 FGPropertyData* pData = new FGPropertyData;
811 SGPropertyNode::Type type = SGPropertyNode::UNSPECIFIED;
813 // First element is always the ID
814 pData->id = XDR_decode_uint32(*xdr);
815 //cout << pData->id << " ";
818 // Check the ID actually exists and get the type
819 const IdPropertyList* plist = findProperty(pData->id);
823 pData->type = plist->type;
824 // How we decode the remainder of the property depends on the type
825 switch (pData->type) {
826 case SGPropertyNode::INT:
827 case SGPropertyNode::BOOL:
828 case SGPropertyNode::LONG:
829 pData->int_value = XDR_decode_uint32(*xdr);
831 //cout << pData->int_value << "\n";
833 case SGPropertyNode::FLOAT:
834 case SGPropertyNode::DOUBLE:
835 pData->float_value = XDR_decode_float(*xdr);
837 //cout << pData->float_value << "\n";
839 case SGPropertyNode::STRING:
840 case SGPropertyNode::UNSPECIFIED:
842 // String is complicated. It consists of
843 // The length of the string
845 // Padding to the nearest 4-bytes.
846 uint32_t length = XDR_decode_uint32(*xdr);
848 //cout << length << " ";
850 if ((length > 0) && (length < MAX_TEXT_SIZE))
852 pData->string_value = new char[length + 1];
853 //cout << " String: ";
855 for (int i = 0; i < length; i++)
857 pData->string_value[i] = (char) XDR_decode_int8(*xdr);
859 //cout << pData->string_value[i];
862 pData->string_value[length] = '\0';
864 // Now handle the padding
865 while ((length % 4) != 0)
874 pData->string_value = new char[1];
875 pData->string_value[0] = '\0';
883 pData->float_value = XDR_decode_float(*xdr);
884 cerr << "Unknown Prop type " << pData->id << " " << pData->type << "\n";
889 motionInfo.properties.push_back(pData);
893 // We failed to find the property. We'll try the next packet immediately.
894 SG_LOG(SG_NETWORK, SG_WARN, "FGMultiplayMgr::ProcessPosMsg - "
895 << "found unknown property id" << pData->id);
899 FGAIMultiplayer* mp = getMultiplayer(MsgHdr->Callsign);
901 mp = addMultiplayer(MsgHdr->Callsign, PosMsg->Model);
902 mp->addMotionInfo(motionInfo, stamp);
903 } // FGMultiplayMgr::ProcessPosMsg()
904 //////////////////////////////////////////////////////////////////////
906 //////////////////////////////////////////////////////////////////////
908 // handle a chat message
909 // FIXME: display chat message withi flightgear
911 //////////////////////////////////////////////////////////////////////
913 FGMultiplayMgr::ProcessChatMsg(const char *Msg, netAddress& SenderAddress)
915 T_MsgHdr* MsgHdr = (T_MsgHdr *)Msg;
916 if (MsgHdr->MsgLen < sizeof(T_MsgHdr) + 1) {
917 SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
918 << "Chat message received with insufficient data" );
922 char *MsgBuf = new char[MsgHdr->MsgLen - sizeof(T_MsgHdr)];
923 strncpy(MsgBuf, ((T_ChatMsg *)(Msg + sizeof(T_MsgHdr)))->Text,
924 MsgHdr->MsgLen - sizeof(T_MsgHdr));
925 MsgBuf[MsgHdr->MsgLen - sizeof(T_MsgHdr) - 1] = '\0';
927 T_ChatMsg* ChatMsg = (T_ChatMsg *)(Msg + sizeof(T_MsgHdr));
928 SG_LOG (SG_NETWORK, SG_ALERT, "Chat [" << MsgHdr->Callsign << "]"
932 } // FGMultiplayMgr::ProcessChatMsg ()
933 //////////////////////////////////////////////////////////////////////
936 FGMultiplayMgr::FillMsgHdr(T_MsgHdr *MsgHdr, int MsgId, unsigned _len)
941 len = sizeof(T_MsgHdr) + sizeof(T_ChatMsg);
947 len = sizeof(T_MsgHdr);
950 MsgHdr->Magic = XDR_encode_uint32(MSG_MAGIC);
951 MsgHdr->Version = XDR_encode_uint32(PROTO_VER);
952 MsgHdr->MsgId = XDR_encode_uint32(MsgId);
953 MsgHdr->MsgLen = XDR_encode_uint32(len);
954 MsgHdr->ReplyAddress = 0; // Are obsolete, keep them for the server for
955 MsgHdr->ReplyPort = 0; // now
956 strncpy(MsgHdr->Callsign, mCallsign.c_str(), MAX_CALLSIGN_LEN);
957 MsgHdr->Callsign[MAX_CALLSIGN_LEN - 1] = '\0';
961 FGMultiplayMgr::addMultiplayer(const std::string& callsign,
962 const std::string& modelName)
964 if (0 < mMultiPlayerMap.count(callsign))
965 return mMultiPlayerMap[callsign].get();
967 FGAIMultiplayer* mp = new FGAIMultiplayer;
968 mp->setPath(modelName.c_str());
969 mp->setCallSign(callsign);
970 mMultiPlayerMap[callsign] = mp;
972 FGAIManager *aiMgr = (FGAIManager*)globals->get_subsystem("ai_model");
976 /// FIXME: that must follow the attach ATM ...
977 for (unsigned i = 0; i < numProperties; ++i)
978 mp->addPropertyId(sIdPropertyList[i].id, sIdPropertyList[i].name);
985 FGMultiplayMgr::getMultiplayer(const std::string& callsign)
987 if (0 < mMultiPlayerMap.count(callsign))
988 return mMultiPlayerMap[callsign].get();