#include <iostream>
#include <algorithm>
+ #include <cstring>
#include <osg/Math> // isNaN
#include <plib/netSocket.h>
#include "multiplaymgr.hxx"
#include "mpmessages.hxx"
- using std::cerr;
+ using namespace std;
#define MAX_PACKET_SIZE 1200
#define MAX_TEXT_SIZE 128
{1100, "sim/model/variant", SGPropertyNode::INT},
{1101, "sim/model/livery/file", SGPropertyNode::STRING},
+ {1200, "environment/wildfire/data", SGPropertyNode::STRING},
+
{10001, "sim/multiplay/transmission-freq-hz", SGPropertyNode::STRING},
{10002, "sim/multiplay/chat", SGPropertyNode::STRING},
// to change...
uint32_t length = XDR_decode_uint32(*xdr);
xdr++;
- if ((length > 0) && (length < MAX_TEXT_SIZE)) {
- xdr += length;
- // Now handle the padding
- while ((length % 4) != 0)
- {
- xdr++;
- length++;
- //cout << "0";
- }
- } else {
- // The string appears to be invalid; bail.
- return false;
- }
+ // Old versions truncated the string but left the length
+ // unadjusted.
+ if (length > MAX_TEXT_SIZE)
+ length = MAX_TEXT_SIZE;
+ xdr += length;
+ // Now handle the padding
+ while ((length % 4) != 0)
+ {
+ xdr++;
+ length++;
+ //cout << "0";
+ }
}
break;
default:
// Description: Sends the position data for the local position.
//
//////////////////////////////////////////////////////////////////////
+
+ /**
+ * The buffer that holds a multi-player message, suitably aligned.
+ */
+ union FGMultiplayMgr::MsgBuf
+ {
+ MsgBuf()
+ {
+ memset(&Msg, 0, sizeof(Msg));
+ }
+
+ T_MsgHdr* msgHdr()
+ {
+ return reinterpret_cast<T_MsgHdr*>(Msg);
+ }
+
+ const T_MsgHdr* msgHdr() const
+ {
+ return reinterpret_cast<const T_MsgHdr*>(Msg);
+ }
+
+ T_PositionMsg* posMsg()
+ {
+ return reinterpret_cast<T_PositionMsg*>(Msg + sizeof(T_MsgHdr));
+ }
+
+ const T_PositionMsg* posMsg() const
+ {
+ return reinterpret_cast<const T_PositionMsg*>(Msg + sizeof(T_MsgHdr));
+ }
+
+ xdr_data_t* properties()
+ {
+ return reinterpret_cast<xdr_data_t*>(Msg + sizeof(T_MsgHdr)
+ + sizeof(T_PositionMsg));
+ }
+
+ const xdr_data_t* properties() const
+ {
+ return reinterpret_cast<const xdr_data_t*>(Msg + sizeof(T_MsgHdr)
+ + sizeof(T_PositionMsg));
+ }
+ /**
+ * The end of the properties buffer.
+ */
+ xdr_data_t* propsEnd()
+ {
+ return reinterpret_cast<xdr_data_t*>(Msg + MAX_PACKET_SIZE);
+ };
+
+ const xdr_data_t* propsEnd() const
+ {
+ return reinterpret_cast<const xdr_data_t*>(Msg + MAX_PACKET_SIZE);
+ };
+ /**
+ * The end of properties actually in the buffer. This assumes that
+ * the message header is valid.
+ */
+ xdr_data_t* propsRecvdEnd()
+ {
+ return reinterpret_cast<xdr_data_t*>(Msg + msgHdr()->MsgLen);
+ }
+
+ const xdr_data_t* propsRecvdEnd() const
+ {
+ return reinterpret_cast<const xdr_data_t*>(Msg + msgHdr()->MsgLen);
+ }
+
+ xdr_data2_t double_val;
+ char Msg[MAX_PACKET_SIZE];
+ };
+
void
FGMultiplayMgr::SendMyPosition(const FGExternalMotionData& motionInfo)
{
return;
}
- T_PositionMsg PosMsg;
+ MsgBuf msgBuf;
+ T_PositionMsg* PosMsg = msgBuf.posMsg();
- memset(&PosMsg, 0, sizeof(PosMsg));
- strncpy(PosMsg.Model, fgGetString("/sim/model/path"), MAX_MODEL_NAME_LEN);
- PosMsg.Model[MAX_MODEL_NAME_LEN - 1] = '\0';
+ strncpy(PosMsg->Model, fgGetString("/sim/model/path"), MAX_MODEL_NAME_LEN);
+ PosMsg->Model[MAX_MODEL_NAME_LEN - 1] = '\0';
- PosMsg.time = XDR_encode_double (motionInfo.time);
- PosMsg.lag = XDR_encode_double (motionInfo.lag);
+ PosMsg->time = XDR_encode_double (motionInfo.time);
+ PosMsg->lag = XDR_encode_double (motionInfo.lag);
for (unsigned i = 0 ; i < 3; ++i)
- PosMsg.position[i] = XDR_encode_double (motionInfo.position(i));
+ PosMsg->position[i] = XDR_encode_double (motionInfo.position(i));
SGVec3f angleAxis;
motionInfo.orientation.getAngleAxis(angleAxis);
for (unsigned i = 0 ; i < 3; ++i)
- PosMsg.orientation[i] = XDR_encode_float (angleAxis(i));
+ PosMsg->orientation[i] = XDR_encode_float (angleAxis(i));
for (unsigned i = 0 ; i < 3; ++i)
- PosMsg.linearVel[i] = XDR_encode_float (motionInfo.linearVel(i));
+ PosMsg->linearVel[i] = XDR_encode_float (motionInfo.linearVel(i));
for (unsigned i = 0 ; i < 3; ++i)
- PosMsg.angularVel[i] = XDR_encode_float (motionInfo.angularVel(i));
+ PosMsg->angularVel[i] = XDR_encode_float (motionInfo.angularVel(i));
for (unsigned i = 0 ; i < 3; ++i)
- PosMsg.linearAccel[i] = XDR_encode_float (motionInfo.linearAccel(i));
+ PosMsg->linearAccel[i] = XDR_encode_float (motionInfo.linearAccel(i));
for (unsigned i = 0 ; i < 3; ++i)
- PosMsg.angularAccel[i] = XDR_encode_float (motionInfo.angularAccel(i));
-
- char Msg[MAX_PACKET_SIZE];
- memcpy(Msg + sizeof(T_MsgHdr), &PosMsg, sizeof(T_PositionMsg));
+ PosMsg->angularAccel[i] = XDR_encode_float (motionInfo.angularAccel(i));
- char* ptr = Msg + sizeof(T_MsgHdr) + sizeof(T_PositionMsg);
+ xdr_data_t* ptr = msgBuf.properties();
std::vector<FGPropertyData*>::const_iterator it;
it = motionInfo.properties.begin();
//cout << "OUTPUT PROPERTIES\n";
- while (it != motionInfo.properties.end()
- && ptr + 2 * sizeof(xdr_data_t) < (Msg + MAX_PACKET_SIZE)) {
-
- // First elements is the ID
- xdr_data_t xdr = XDR_encode_uint32((*it)->id);
- memcpy(ptr, &xdr, sizeof(xdr_data_t));
- ptr += sizeof(xdr_data_t);
+ xdr_data_t* msgEnd = msgBuf.propsEnd();
+ while (it != motionInfo.properties.end() && ptr + 2 < msgEnd) {
+ // First element is the ID. Write it out when we know we have room for
+ // the whole property.
+ xdr_data_t id = XDR_encode_uint32((*it)->id);
// The actual data representation depends on the type
switch ((*it)->type) {
case SGPropertyNode::INT:
case SGPropertyNode::BOOL:
- case SGPropertyNode::LONG:
- xdr = XDR_encode_uint32((*it)->int_value);
- memcpy(ptr, &xdr, sizeof(xdr_data_t));
- ptr += sizeof(xdr_data_t);
+ case SGPropertyNode::LONG:
+ *ptr++ = id;
+ *ptr++ = XDR_encode_uint32((*it)->int_value);
//cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->int_value << "\n";
break;
case SGPropertyNode::FLOAT:
case SGPropertyNode::DOUBLE:
- xdr = XDR_encode_float((*it)->float_value);;
- memcpy(ptr, &xdr, sizeof(xdr_data_t));
- ptr += sizeof(xdr_data_t);
+ *ptr++ = id;
+ *ptr++ = XDR_encode_float((*it)->float_value);
//cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->float_value << "\n";
break;
case SGPropertyNode::STRING:
// Add the length
////cout << "String length: " << strlen(lcharptr) << "\n";
uint32_t len = strlen(lcharptr);
+ if (len > MAX_TEXT_SIZE)
+ len = MAX_TEXT_SIZE;
// XXX This should not be using 4 bytes per character!
- if (ptr + (1 + len + (4 - len % 4)) * sizeof (xdr_data_t)
- >= (Msg + MAX_PACKET_SIZE))
+ // If there's not enough room for this property, drop it
+ // on the floor.
+ if (ptr + 2 + ((len + 3) & ~3) > msgEnd)
goto escape;
//cout << "String length unint32: " << len << "\n";
- xdr = XDR_encode_uint32(len);
- memcpy(ptr, &xdr, sizeof(xdr_data_t));
- ptr += sizeof(xdr_data_t);
-
+ *ptr++ = id;
+ *ptr++ = XDR_encode_uint32(len);
if (len != 0)
{
-
// Now the text itself
// XXX This should not be using 4 bytes per character!
int lcount = 0;
while ((*lcharptr != '\0') && (lcount < MAX_TEXT_SIZE))
{
- xdr = XDR_encode_int8(*lcharptr);
- memcpy(ptr, &xdr, sizeof(xdr_data_t));
- ptr += sizeof(xdr_data_t);
+ *ptr++ = XDR_encode_int8(*lcharptr);
lcharptr++;
lcount++;
}
// Now pad if required
while ((lcount % 4) != 0)
{
- xdr = XDR_encode_int8(0);
- memcpy(ptr, &xdr, sizeof(xdr_data_t));
- ptr += sizeof(xdr_data_t);
+ *ptr++ = XDR_encode_int8(0);
lcount++;
//cout << "0";
}
else
{
// Nothing to encode
- xdr = XDR_encode_uint32(0);
- memcpy(ptr, &xdr, sizeof(xdr_data_t));
- ptr += sizeof(xdr_data_t);
+ *ptr++ = id;
+ *ptr++ = XDR_encode_uint32(0);
//cout << "Prop:" << (*it)->id << " " << (*it)->type << " 0\n";
}
-
}
break;
default:
//cout << " Unknown Type: " << (*it)->type << "\n";
- xdr = XDR_encode_float((*it)->float_value);;
- memcpy(ptr, &xdr, sizeof(xdr_data_t));
- ptr += sizeof(xdr_data_t);
+ *ptr++ = id;
+ *ptr++ = XDR_encode_float((*it)->float_value);;
//cout << "Prop:" << (*it)->id << " " << (*it)->type << " "<< (*it)->float_value << "\n";
break;
}
++it;
}
escape:
-
- T_MsgHdr MsgHdr;
- FillMsgHdr(&MsgHdr, POS_DATA_ID, ptr - Msg);
- memcpy(Msg, &MsgHdr, sizeof(T_MsgHdr));
-
- mSocket->sendto(Msg, ptr - Msg, 0, &mServer);
+ unsigned msgLen = reinterpret_cast<char*>(ptr) - msgBuf.Msg;
+ FillMsgHdr(msgBuf.msgHdr(), POS_DATA_ID, msgLen);
+ mSocket->sendto(msgBuf.Msg, msgLen, 0, &mServer);
SG_LOG(SG_NETWORK, SG_DEBUG, "FGMultiplayMgr::SendMyPosition");
} // FGMultiplayMgr::SendMyPosition()
+
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////
int bytes;
do {
- char Msg[MAX_PACKET_SIZE];
+ MsgBuf msgBuf;
//////////////////////////////////////////////////
// Although the recv call asks for
// MAX_PACKET_SIZE of data, the number of bytes
// packet waiting to be processed.
//////////////////////////////////////////////////
netAddress SenderAddress;
- bytes = mSocket->recvfrom(Msg, sizeof(Msg), 0, &SenderAddress);
+ bytes = mSocket->recvfrom(msgBuf.Msg, sizeof(msgBuf.Msg), 0,
+ &SenderAddress);
//////////////////////////////////////////////////
// no Data received
//////////////////////////////////////////////////
//////////////////////////////////////////////////
// Read header
//////////////////////////////////////////////////
- T_MsgHdr* MsgHdr = (T_MsgHdr *)Msg;
+ T_MsgHdr* MsgHdr = msgBuf.msgHdr();
MsgHdr->Magic = XDR_decode_uint32 (MsgHdr->Magic);
MsgHdr->Version = XDR_decode_uint32 (MsgHdr->Version);
MsgHdr->MsgId = XDR_decode_uint32 (MsgHdr->MsgId);
MsgHdr->MsgLen = XDR_decode_uint32 (MsgHdr->MsgLen);
MsgHdr->ReplyPort = XDR_decode_uint32 (MsgHdr->ReplyPort);
+ MsgHdr->Callsign[MAX_CALLSIGN_LEN -1] = '\0';
if (MsgHdr->Magic != MSG_MAGIC) {
SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
<< "message has invalid magic number!" );
break;
}
if (MsgHdr->MsgLen != bytes) {
- SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
- << "message has invalid length!" );
+ SG_LOG(SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
+ << "message from " << MsgHdr->Callsign << " has invalid length!");
break;
}
//////////////////////////////////////////////////
//////////////////////////////////////////////////
switch (MsgHdr->MsgId) {
case CHAT_MSG_ID:
- ProcessChatMsg(Msg, SenderAddress);
+ ProcessChatMsg(msgBuf, SenderAddress);
break;
case POS_DATA_ID:
- ProcessPosMsg(Msg, SenderAddress, bytes, stamp);
+ ProcessPosMsg(msgBuf, SenderAddress, stamp);
break;
case UNUSABLE_POS_DATA_ID:
case OLD_OLD_POS_DATA_ID:
//
//////////////////////////////////////////////////////////////////////
void
- FGMultiplayMgr::ProcessPosMsg(const char *Msg, netAddress & SenderAddress,
- unsigned len, long stamp)
+ FGMultiplayMgr::ProcessPosMsg(const FGMultiplayMgr::MsgBuf& Msg,
+ const netAddress& SenderAddress, long stamp)
{
- T_MsgHdr* MsgHdr = (T_MsgHdr *)Msg;
+ const T_MsgHdr* MsgHdr = Msg.msgHdr();
if (MsgHdr->MsgLen < sizeof(T_MsgHdr) + sizeof(T_PositionMsg)) {
SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
<< "Position message received with insufficient data" );
return;
}
- T_PositionMsg* PosMsg = (T_PositionMsg *)(Msg + sizeof(T_MsgHdr));
+ const T_PositionMsg* PosMsg = Msg.posMsg();
FGExternalMotionData motionInfo;
motionInfo.time = XDR_decode_double(PosMsg->time);
motionInfo.lag = XDR_decode_double(PosMsg->lag);
//cout << "INPUT MESSAGE\n";
- xdr_data_t* xdr = (xdr_data_t*)
- (Msg + sizeof(T_MsgHdr) + sizeof(T_PositionMsg));
+
// There was a bug in 1.9.0 and before: T_PositionMsg was 196 bytes
// on 32 bit architectures and 200 bytes on 64 bit, and this
// structure is put directly on the wire. By looking at the padding,
// There is a chance that we could be fooled by garbage in the
// padding looking like a valid property, so verifyProperties() is
// strict about the validity of the property values.
+ const xdr_data_t* xdr = Msg.properties();
if (PosMsg->pad != 0) {
- if (verifyProperties(&PosMsg->pad,
- reinterpret_cast<const xdr_data_t*>(Msg + len)))
+ if (verifyProperties(&PosMsg->pad, Msg.propsRecvdEnd()))
xdr = &PosMsg->pad;
- else if (!verifyProperties(xdr,
- reinterpret_cast<const xdr_data_t*>(Msg + len)))
+ else if (!verifyProperties(xdr, Msg.propsRecvdEnd()))
goto noprops;
}
- while ((char*)xdr < Msg + len) {
+ while (xdr < Msg.propsRecvdEnd()) {
FGPropertyData* pData = new FGPropertyData;
SGPropertyNode::Type type = SGPropertyNode::UNSPECIFIED;
uint32_t length = XDR_decode_uint32(*xdr);
xdr++;
//cout << length << " ";
-
- if ((length > 0) && (length < MAX_TEXT_SIZE))
- {
- pData->string_value = new char[length + 1];
- //cout << " String: ";
-
- for (int i = 0; i < length; i++)
+ // Old versions truncated the string but left the length unadjusted.
+ if (length > MAX_TEXT_SIZE)
+ length = MAX_TEXT_SIZE;
+ pData->string_value = new char[length + 1];
+ //cout << " String: ";
+ for (int i = 0; i < length; i++)
{
pData->string_value[i] = (char) XDR_decode_int8(*xdr);
xdr++;
//cout << pData->string_value[i];
}
- pData->string_value[length] = '\0';
+ pData->string_value[length] = '\0';
- // Now handle the padding
- while ((length % 4) != 0)
+ // Now handle the padding
+ while ((length % 4) != 0)
{
xdr++;
length++;
//cout << "0";
}
- }
- else
- {
- pData->string_value = new char[1];
- pData->string_value[0] = '\0';
- }
-
//cout << "\n";
}
break;
else
{
// We failed to find the property. We'll try the next packet immediately.
- SG_LOG(SG_NETWORK, SG_WARN, "FGMultiplayMgr::ProcessPosMsg - "
- << "found unknown property id" << pData->id);
+ SG_LOG(SG_NETWORK, SG_INFO, "FGMultiplayMgr::ProcessPosMsg - "
+ "message from " << MsgHdr->Callsign << " has unknown property id "
+ << pData->id);
}
}
noprops:
//
//////////////////////////////////////////////////////////////////////
void
- FGMultiplayMgr::ProcessChatMsg(const char *Msg, netAddress& SenderAddress)
+ FGMultiplayMgr::ProcessChatMsg(const MsgBuf& Msg,
+ const netAddress& SenderAddress)
{
- T_MsgHdr* MsgHdr = (T_MsgHdr *)Msg;
+ const T_MsgHdr* MsgHdr = Msg.msgHdr();
if (MsgHdr->MsgLen < sizeof(T_MsgHdr) + 1) {
SG_LOG( SG_NETWORK, SG_ALERT, "FGMultiplayMgr::MP_ProcessData - "
<< "Chat message received with insufficient data" );
return;
}
- char *MsgBuf = new char[MsgHdr->MsgLen - sizeof(T_MsgHdr)];
- strncpy(MsgBuf, ((T_ChatMsg *)(Msg + sizeof(T_MsgHdr)))->Text,
+ char *chatStr = new char[MsgHdr->MsgLen - sizeof(T_MsgHdr)];
+ strncpy(chatStr,
+ (reinterpret_cast<const T_ChatMsg *>(Msg.Msg + sizeof(T_MsgHdr)))
+ ->Text,
MsgHdr->MsgLen - sizeof(T_MsgHdr));
- MsgBuf[MsgHdr->MsgLen - sizeof(T_MsgHdr) - 1] = '\0';
+ chatStr[MsgHdr->MsgLen - sizeof(T_MsgHdr) - 1] = '\0';
- T_ChatMsg* ChatMsg = (T_ChatMsg *)(Msg + sizeof(T_MsgHdr));
+ const T_ChatMsg* ChatMsg
+ = reinterpret_cast<const T_ChatMsg *>(Msg.Msg + sizeof(T_MsgHdr));
SG_LOG (SG_NETWORK, SG_ALERT, "Chat [" << MsgHdr->Callsign << "]"
- << " " << MsgBuf);
+ << " " << chatStr);
- delete [] MsgBuf;
+ delete [] chatStr;
} // FGMultiplayMgr::ProcessChatMsg ()
//////////////////////////////////////////////////////////////////////
projects / flightgear.git / commitdiff