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DarkflameServer/thirdparty/raknet/Source/ReliabilityLayer.cpp

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Public release of the DLU server code! Have fun!
2021-12-05 17:54:36 +00:00
/// \file
///
/// This file is part of RakNet Copyright 2003 Kevin Jenkins.
///
/// Usage of RakNet is subject to the appropriate license agreement.
/// Creative Commons Licensees are subject to the
/// license found at
/// http://creativecommons.org/licenses/by-nc/2.5/
/// Single application licensees are subject to the license found at
/// http://www.jenkinssoftware.com/SingleApplicationLicense.html
/// Custom license users are subject to the terms therein.
/// GPL license users are subject to the GNU General Public
/// License as published by the Free
/// Software Foundation; either version 2 of the License, or (at your
/// option) any later version.
#include "ReliabilityLayer.h"
#include "GetTime.h"
#include "SocketLayer.h"
#include "PluginInterface.h"
#include "RakAssert.h"
#include "Rand.h"
#include "MessageIdentifiers.h"
#include <math.h>
static const int DEFAULT_HAS_RECEIVED_PACKET_QUEUE_SIZE=512;
static const RakNetTimeNS MAX_TIME_BETWEEN_PACKETS= 350000; // 350 milliseconds
static const RakNetTimeNS STARTING_TIME_BETWEEN_PACKETS=MAX_TIME_BETWEEN_PACKETS;
static const RakNetTimeNS HISTOGRAM_RESTART_CYCLE=10000000; // Every 10 seconds reset the histogram
static const long double TIME_BETWEEN_PACKETS_INCREASE_MULTIPLIER_DEFAULT=.02;
static const long double TIME_BETWEEN_PACKETS_DECREASE_MULTIPLIER_DEFAULT=.04;
#ifdef _MSC_VER
#pragma warning( push )
#endif
#ifdef _WIN32
//#define _DEBUG_LOGGER
#ifdef _DEBUG_LOGGER
#include <windows.h>
#endif
#endif
//#define DEBUG_SPLIT_PACKET_PROBLEMS
#if defined (DEBUG_SPLIT_PACKET_PROBLEMS)
static int waitFlag=-1;
#endif
using namespace RakNet;
int SplitPacketChannelComp( SplitPacketIdType const &key, SplitPacketChannel* const &data )
{
if (key < data->splitPacketList[0]->splitPacketId)
return -1;
if (key == data->splitPacketList[0]->splitPacketId)
return 0;
return 1;
}
int SplitPacketIndexComp( SplitPacketIndexType const &key, InternalPacket* const &data )
{
if (key < data->splitPacketIndex)
return -1;
if (key == data->splitPacketIndex)
return 0;
return 1;
}
//-------------------------------------------------------------------------------------------------------
// Constructor
//-------------------------------------------------------------------------------------------------------
// Add 21 to the default MTU so if we encrypt it can hold potentially 21 more bytes of extra data + padding.
ReliabilityLayer::ReliabilityLayer() : updateBitStream( DEFAULT_MTU_SIZE + 21 ) // preallocate the update bitstream so we can avoid a lot of reallocs at runtime
{
freeThreadedMemoryOnNextUpdate = false;
#ifdef _DEBUG
// Wait longer to disconnect in debug so I don't get disconnected while tracing
timeoutTime=30000;
#else
timeoutTime=10000;
#endif
#ifndef _RELEASE
maxSendBPS=minExtraPing=extraPingVariance=0;
#endif
InitializeVariables();
}
//-------------------------------------------------------------------------------------------------------
// Destructor
//-------------------------------------------------------------------------------------------------------
ReliabilityLayer::~ReliabilityLayer()
{
FreeMemory( true ); // Free all memory immediately
}
//-------------------------------------------------------------------------------------------------------
// Resets the layer for reuse
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::Reset( bool resetVariables )
{
FreeMemory( true ); // true because making a memory reset pending in the update cycle causes resets after reconnects. Instead, just call Reset from a single thread
if (resetVariables)
InitializeVariables();
}
//-------------------------------------------------------------------------------------------------------
// Sets up encryption
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::SetEncryptionKey( const unsigned char* key )
{
if ( key )
encryptor.SetKey( key );
else
encryptor.UnsetKey();
}
//-------------------------------------------------------------------------------------------------------
// Set the time, in MS, to use before considering ourselves disconnected after not being able to deliver a reliable packet
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::SetTimeoutTime( RakNetTime time )
{
timeoutTime=time;
}
//-------------------------------------------------------------------------------------------------------
// Returns the value passed to SetTimeoutTime. or the default if it was never called
//-------------------------------------------------------------------------------------------------------
RakNetTime ReliabilityLayer::GetTimeoutTime(void)
{
return timeoutTime;
}
//-------------------------------------------------------------------------------------------------------
// Initialize the variables
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::InitializeVariables( void )
{
memset( waitingForOrderedPacketReadIndex, 0, NUMBER_OF_ORDERED_STREAMS * sizeof(OrderingIndexType));
memset( waitingForSequencedPacketReadIndex, 0, NUMBER_OF_ORDERED_STREAMS * sizeof(OrderingIndexType) );
memset( waitingForOrderedPacketWriteIndex, 0, NUMBER_OF_ORDERED_STREAMS * sizeof(OrderingIndexType) );
memset( waitingForSequencedPacketWriteIndex, 0, NUMBER_OF_ORDERED_STREAMS * sizeof(OrderingIndexType) );
memset( &statistics, 0, sizeof( statistics ) );
statistics.connectionStartTime = RakNet::GetTime();
splitPacketId = 0;
throughputCapCountdown=0;
sendMessageNumberIndex = 0;
internalOrderIndex=0;
lastUpdateTime= RakNet::GetTimeNS();
lastTimeBetweenPacketsIncrease=lastTimeBetweenPacketsDecrease=0;
remoteSystemTime=0;
// lastPacketSendTime=retransmittedFrames=sentPackets=sentFrames=receivedPacketsCount=bytesSent=bytesReceived=0;
nextAllowedThroughputSample=0;
deadConnection = cheater = false;
lastAckTime = 0;
// ackPing=0;
receivedPacketsBaseIndex=0;
resetReceivedPackets=true;
sendPacketCount=receivePacketCount=0;
// SetPing( 1000 );
timeBetweenPackets=STARTING_TIME_BETWEEN_PACKETS;
ackPingIndex=0;
ackPingSum=(RakNetTimeNS)0;
nextSendTime=lastUpdateTime;
//nextLowestPingReset=(RakNetTimeNS)0;
continuousSend=false;
histogramStart=(RakNetTimeNS)0;
histogramBitsSent=0;
packetlossThisSample=backoffThisSample=false;
packetlossThisSampleResendCount=0;
// timeBetweenPacketsIncreaseMultiplier=TIME_BETWEEN_PACKETS_INCREASE_MULTIPLIER_DEFAULT;
// timeBetweenPacketsDecreaseMultiplier=TIME_BETWEEN_PACKETS_DECREASE_MULTIPLIER_DEFAULT;
}
//-------------------------------------------------------------------------------------------------------
// Frees all allocated memory
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::FreeMemory( bool freeAllImmediately )
{
if ( freeAllImmediately )
{
FreeThreadedMemory();
FreeThreadSafeMemory();
}
else
{
FreeThreadSafeMemory();
freeThreadedMemoryOnNextUpdate = true;
}
}
void ReliabilityLayer::FreeThreadedMemory( void )
{
}
void ReliabilityLayer::FreeThreadSafeMemory( void )
{
unsigned i,j;
InternalPacket *internalPacket;
for (i=0; i < splitPacketChannelList.Size(); i++)
{
for (j=0; j < splitPacketChannelList[i]->splitPacketList.Size(); j++)
{
rakFree(splitPacketChannelList[i]->splitPacketList[j]->data);
// internalPacketPool.Release( splitPacketChannelList[i]->splitPacketList[j] );
}
delete splitPacketChannelList[i];
}
splitPacketChannelList.Clear();
while ( outputQueue.Size() > 0 )
{
internalPacket = outputQueue.Pop();
rakFree(internalPacket->data);
// internalPacketPool.Release( internalPacket );
}
outputQueue.ClearAndForceAllocation( 32 );
for ( i = 0; i < orderingList.Size(); i++ )
{
if ( orderingList[ i ] )
{
DataStructures::LinkedList<InternalPacket*>* theList = orderingList[ i ];
if ( theList )
{
while ( theList->Size() )
{
internalPacket = orderingList[ i ]->Pop();
rakFree(internalPacket->data);
// internalPacketPool.Release( internalPacket );
}
delete theList;
}
}
}
orderingList.Clear();
//resendList.ForEachData(DeleteInternalPacket);
resendList.Clear();
while ( resendQueue.Size() )
{
// The resend Queue can have NULL pointer holes. This is so we can deallocate blocks without having to compress the array
internalPacket = resendQueue.Pop();
if ( internalPacket )
{
rakFree(internalPacket->data);
// internalPacketPool.Release( internalPacket );
}
}
resendQueue.ClearAndForceAllocation( DEFAULT_HAS_RECEIVED_PACKET_QUEUE_SIZE );
for ( i = 0; i < NUMBER_OF_PRIORITIES; i++ )
{
j = 0;
for ( ; j < sendPacketSet[ i ].Size(); j++ )
{
rakFree(( sendPacketSet[ i ] ) [ j ]->data);
//internalPacketPool.Release( ( sendPacketSet[ i ] ) [ j ] );
}
sendPacketSet[ i ].ClearAndForceAllocation( 32 ); // Preallocate the send lists so we don't do a bunch of reallocations unnecessarily
}
#ifndef _RELEASE
for (unsigned i = 0; i < delayList.Size(); i++ )
delete delayList[ i ];
delayList.Clear();
#endif
internalPacketPool.Clear();
acknowlegements.Clear();
}
//-------------------------------------------------------------------------------------------------------
// Packets are read directly from the socket layer and skip the reliability
//layer because unconnected players do not use the reliability layer
// This function takes packet data after a player has been confirmed as
//connected. The game should not use that data directly
// because some data is used internally, such as packet acknowledgment and
//split packets
//-------------------------------------------------------------------------------------------------------
bool ReliabilityLayer::HandleSocketReceiveFromConnectedPlayer( const char *buffer, unsigned int length, SystemAddress systemAddress, DataStructures::List<PluginInterface*> &messageHandlerList, int MTUSize )
{
#ifdef _DEBUG
assert( !( buffer == 0 ) );
#endif
(void) MTUSize;
if ( length <= 2 || buffer == 0 ) // Length of 1 is a connection request resend that we just ignore
return true;
//int numberOfAcksInFrame = 0;
RakNetTimeNS time;
bool indexFound;
int count, size;
MessageNumberType holeCount;
unsigned i;
bool hasAcks=false;
// bool duplicatePacket;
// bytesReceived+=length + UDP_HEADER_SIZE;
UpdateThreadedMemory();
// decode this whole chunk if the decoder is defined.
if ( encryptor.IsKeySet() )
{
if ( encryptor.Decrypt( ( unsigned char* ) buffer, length, ( unsigned char* ) buffer, &length ) == false )
{
statistics.bitsWithBadCRCReceived += length * 8;
statistics.packetsWithBadCRCReceived++;
return false;
}
}
statistics.bitsReceived += length * 8;
statistics.packetsReceived++;
RakNet::BitStream socketData( (unsigned char*) buffer, length, false ); // Convert the incoming data to a bitstream for easy parsing
time = RakNet::GetTimeNS();
DataStructures::RangeList<MessageNumberType> incomingAcks;
socketData.Read(hasAcks);
if (hasAcks)
{
MessageNumberType messageNumber;
RemoteSystemTimeType ourSystemTime;
socketData.Read(ourSystemTime);
if (incomingAcks.Deserialize(&socketData)==false)
return false;
for (i=0; i<incomingAcks.ranges.Size();i++)
{
if (incomingAcks.ranges[i].minIndex>incomingAcks.ranges[i].maxIndex)
{
RakAssert(incomingAcks.ranges[i].minIndex<=incomingAcks.ranges[i].maxIndex);
return false;
}
for (messageNumber=incomingAcks.ranges[i].minIndex; messageNumber >= incomingAcks.ranges[i].minIndex && messageNumber <= incomingAcks.ranges[i].maxIndex; messageNumber++)
{
hasAcks=true;
// GOT ACK
// SHOW - ack received
// printf("Got Ack for %i\n",messageNumber);
RemovePacketFromResendListAndDeleteOlderReliableSequenced( messageNumber, time );
#ifdef _DEBUG_LOGGER
{
char temp[256];
sprintf(temp, "%p: Got ack for %i. Resend queue size=%i\n", this, messageNumber, resendQueue.Size());
OutputDebugStr(temp);
}
#endif
if ( resendList.IsEmpty() )
{
lastAckTime = 0; // Not resending anything so clear this var so we don't drop the connection on not getting any more acks
}
else
{
lastAckTime = time; // Just got an ack. Record when we got it so we know the connection is alive
}
}
}
RakNetTimeNS rst = (RakNetTimeNS) ourSystemTime * (RakNetTimeNS) 1000;
if (time >= rst)
ackPing = time - rst;
else
ackPing=0;
RakNetTimeNS avePing;
if (ackPingSum==0)
{
// First time between packets is just the ping.
timeBetweenPackets = ackPing;
if (timeBetweenPackets > MAX_TIME_BETWEEN_PACKETS)
timeBetweenPackets=MAX_TIME_BETWEEN_PACKETS;
else if (timeBetweenPackets < (RakNetTimeNS)10000 )
timeBetweenPackets=(RakNetTimeNS)10000;
ackPingSum=ackPing<<8; // Multiply by 256
for (int i=0; i < 256; i++)
ackPingSamples[i]=ackPing;
}
avePing=ackPingSum>>8; // divide by 256
if (continuousSend && time >= nextAllowedThroughputSample)
{
// 10 milliseconds tolerance, because at small pings percentage fluctuations vary widely naturally
bool pingLowering = ackPing <= avePing * (RakNetTimeNS)6 / (RakNetTimeNS)5
+ (RakNetTimeNS)10000;
// Only increase if the ping is lowering and there was no packetloss
if (pingLowering==true && packetlossThisSample==false)
{
// Only count towards the average when ping declining and no packetloss the last sample.
// Otherwise it eventually averages to when we get packetloss.
ackPingSum-=ackPingSamples[ackPingIndex];
ackPingSamples[ackPingIndex]=ackPing;
ackPingSum+=ackPing;
ackPingIndex++; // Might wrap to 0
RakNetTimeNS diff;
// Decrease time between packets by 2%
diff = (RakNetTimeNS)ceil(((long double) timeBetweenPackets * TIME_BETWEEN_PACKETS_INCREASE_MULTIPLIER_DEFAULT));
if (diff < timeBetweenPackets)
{
nextSendTime-=diff;
timeBetweenPackets-=diff;
}
// printf("- CurPing: %i. AvePing: %i. Ploss=%.1f. Time between= %i\n", (RakNetTime)(ackPing/(RakNetTimeNS)1000), (RakNetTime)(avePing/(RakNetTimeNS)1000), 100.0f * ( float ) statistics.messagesTotalBitsResent / ( float ) statistics.totalBitsSent, timeBetweenPackets);
lastTimeBetweenPacketsDecrease=time;
}
// Decrease if the ping is rising or we got packetloss for a new group of resends
else if (pingLowering==false || backoffThisSample==true) // if (ackPing >= ((avePing*(RakNetTimeNS)4)/(RakNetTimeNS)3) + (RakNetTimeNS) 1000) // 1 milliseconds tolerance, because at small pings percentage fluctuations vary widely naturally
{
// Increase time between packets by 4%
RakNetTimeNS diff = (RakNetTimeNS)ceil(((long double) timeBetweenPackets * TIME_BETWEEN_PACKETS_DECREASE_MULTIPLIER_DEFAULT));
nextSendTime+=diff;
timeBetweenPackets+=diff;
// printf("+ CurPing: %i. AvePing: %i. Ploss=%.1f. Time between = %i\n", (RakNetTime)(ackPing/(RakNetTimeNS)1000), (RakNetTime)(avePing/(RakNetTimeNS)1000), 100.0f * ( float ) statistics.messagesTotalBitsResent / ( float ) statistics.totalBitsSent,timeBetweenPackets);
lastTimeBetweenPacketsIncrease=time;
if (timeBetweenPackets > MAX_TIME_BETWEEN_PACKETS)
{
// Something wrong, perhaps the entire network clogged up, or a different path was taken.
timeBetweenPackets=MAX_TIME_BETWEEN_PACKETS;
}
}
packetlossThisSample=false;
backoffThisSample=false;
if (ackPing < 2000000)
// 1 milliseconds tolerance, Otherwise we overreact at very small pings
nextAllowedThroughputSample=time+ackPing + (RakNetTimeNS)1000;
else
// Don't resample over super long periods
nextAllowedThroughputSample=time+200000;
// printf("time=%i ",time);
// printf("nextAllowedThroughputSample=%i\n",nextAllowedThroughputSample);
}
// else
// printf("Continuous Send = false\n");
// if (ackPing < lowestPing)
// lowestPing=ackPing;
// if (time > nextLowestPingReset)
// {
// lowestPing=ackPing;
// nextLowestPingReset=time+(RakNetTimeNS)60000000; // Once per minute, reset the lowest ping to account for high level ping changes.
// }
}
bool hasRemoteSystemTime=false;
socketData.Read(hasRemoteSystemTime);
if (hasRemoteSystemTime)
socketData.Read(remoteSystemTime);
// Parse the bitstream to create an internal packet
InternalPacket* internalPacket = CreateInternalPacketFromBitStream( &socketData, time );
if (internalPacket==0)
return hasAcks;
while ( internalPacket )
{
for (i=0; i < messageHandlerList.Size(); i++)
messageHandlerList[i]->OnInternalPacket(internalPacket, receivePacketCount, systemAddress, (RakNetTime)(time/(RakNetTimeNS)1000), false);
{
#ifdef _DEBUG_LOGGER
{
char temp[256];
sprintf(temp, "%p: Got packet %i data: %i bitlen: %i\n", this, internalPacket->messageNumber, (unsigned char) internalPacket->data[0], internalPacket->dataBitLength);
OutputDebugStr(temp);
}
#endif
// resetReceivedPackets is set from a non-threadsafe function.
// We do the actual reset in this function so the data is not modified by multiple threads
if (resetReceivedPackets)
{
hasReceivedPacketQueue.ClearAndForceAllocation(DEFAULT_HAS_RECEIVED_PACKET_QUEUE_SIZE);
receivedPacketsBaseIndex=0;
resetReceivedPackets=false;
}
/*
// REMOVEME
if (internalPacket->reliability==RELIABLE_ORDERED)
{
RakNet::BitStream bitStream;
bitStream.Write((char*)internalPacket->data, BITS_TO_BYTES(internalPacket->dataBitLength));
bitStream.IgnoreBits(8);
unsigned int receivedPacketNumber;
bitStream.Read(receivedPacketNumber);
printf("-- %i, OI=%i\n", receivedPacketNumber, internalPacket->orderingIndex);
}
*/
// If the following conditional is true then this either a duplicate packet
// or an older out of order packet
// The subtraction unsigned overflow is intentional
holeCount = (MessageNumberType)(internalPacket->messageNumber-receivedPacketsBaseIndex);
const MessageNumberType typeRange = (MessageNumberType)-1;
if ( internalPacket->reliability == RELIABLE_SEQUENCED || internalPacket->reliability == RELIABLE_ORDERED || internalPacket->reliability == RELIABLE )
{
#ifdef _DEBUG
// printf("Sending ack for %i, rpbi=%i\n", internalPacket->messageNumber, receivedPacketsBaseIndex);
#endif
SendAcknowledgementPacket( internalPacket->messageNumber, time );
}
if (holeCount==0)
{
// Got what we were expecting
if (hasReceivedPacketQueue.Size())
hasReceivedPacketQueue.Pop();
++receivedPacketsBaseIndex;
}
else if (holeCount > typeRange/2)
{
#ifdef _DEBUG
// printf("under_holeCount=%i, pnum=%i, rpbi=%i\n", (int)holeCount, internalPacket->messageNumber, receivedPacketsBaseIndex);
#endif
// Underflow - got a packet we have already counted past
statistics.duplicateMessagesReceived++;
#if defined(DEBUG_SPLIT_PACKET_PROBLEMS)
if (internalPacket->splitPacketCount>0)
printf("Underflow with hole count %i for split packet with ID %i\n",holeCount, internalPacket->splitPacketId);
#endif
// Duplicate packet
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
goto CONTINUE_SOCKET_DATA_PARSE_LOOP;
}
else if (holeCount<hasReceivedPacketQueue.Size())
{
#ifdef _DEBUG
// printf("over_Fill_holeCount=%i, pnum=%i, rpbi=%i\n", (int)holeCount, internalPacket->messageNumber, receivedPacketsBaseIndex);
#endif
// Got a higher count out of order packet that was missing in the sequence or we already got
if (hasReceivedPacketQueue[holeCount]!=0) // non-zero means this is a hole
{
// Fill in the hole
hasReceivedPacketQueue[holeCount]=0; // We got the packet at holeCount
}
else
{
#ifdef _DEBUG
// printf("Duplicate, holeCount=%i, pnum=%i, rpbi=%i\n", (int)holeCount, internalPacket->messageNumber, receivedPacketsBaseIndex);
#endif
// Not a hole - just a duplicate packet
statistics.duplicateMessagesReceived++;
#if defined(DEBUG_SPLIT_PACKET_PROBLEMS)
if (internalPacket->splitPacketCount>0)
printf("Duplicate hole count %i for split packet with ID %i\n",holeCount, internalPacket->splitPacketId);
#endif
// Duplicate packet
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
goto CONTINUE_SOCKET_DATA_PARSE_LOOP;
}
}
else // holeCount>=receivedPackets.Size()
{
if (holeCount > 1000000)
{
#if defined(DEBUG_SPLIT_PACKET_PROBLEMS)
if (internalPacket->splitPacketCount>0)
printf("High hole count %i for split packet with ID %i\n",holeCount, internalPacket->splitPacketId);
#endif
// Would crash due to out of memory!
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
goto CONTINUE_SOCKET_DATA_PARSE_LOOP;
}
// Got a higher count out of order packet whose messageNumber is higher than we have ever got
#ifdef _DEBUG
// printf("over_Buffered_holeCount=%i, pnum=%i, rpbi=%i\n", (int) holeCount, internalPacket->messageNumber, receivedPacketsBaseIndex);
#endif
// Fix - sending on a higher priority gives us a very very high received packets base index if we formerly had pre-split a lot of messages and
// used that as the message number. Because of this, a lot of time is spent in this linear loop and the timeout time expires because not
// all of the message is sent in time.
// Fixed by late assigning message IDs on the sender
// Add 0 times to the queue until (messageNumber - baseIndex) < queue size.
// RakAssert(holeCount<10000);
while ((MessageNumberType)(holeCount) > hasReceivedPacketQueue.Size())
hasReceivedPacketQueue.Push(time+(RakNetTimeNS)60 * (RakNetTimeNS)1000 * (RakNetTimeNS)1000); // Didn't get this packet - set the time to give up waiting
hasReceivedPacketQueue.Push(0); // Got the packet
#ifdef _DEBUG
// If this assert hits then MessageNumberType has overflowed
assert(hasReceivedPacketQueue.Size() < (unsigned int)((MessageNumberType)(-1)));
#endif
}
// Pop all expired times. 0 means we got the packet, in which case we don't track this index either.
while ( hasReceivedPacketQueue.Size()>0 && hasReceivedPacketQueue.Peek() < time )
{
hasReceivedPacketQueue.Pop();
++receivedPacketsBaseIndex;
}
statistics.messagesReceived++;
// If the allocated buffer is > DEFAULT_HAS_RECEIVED_PACKET_QUEUE_SIZE and it is 3x greater than the number of elements actually being used
if (hasReceivedPacketQueue.AllocationSize() > (unsigned int) DEFAULT_HAS_RECEIVED_PACKET_QUEUE_SIZE && hasReceivedPacketQueue.AllocationSize() > hasReceivedPacketQueue.Size() * 3)
hasReceivedPacketQueue.Compress();
if ( internalPacket->reliability == RELIABLE_SEQUENCED || internalPacket->reliability == UNRELIABLE_SEQUENCED )
{
#ifdef _DEBUG
assert( internalPacket->orderingChannel < NUMBER_OF_ORDERED_STREAMS );
#endif
if ( internalPacket->orderingChannel >= NUMBER_OF_ORDERED_STREAMS )
{
// Invalid packet
#ifdef _DEBUG
// printf( "Got invalid packet\n" );
#endif
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
goto CONTINUE_SOCKET_DATA_PARSE_LOOP;
}
if ( IsOlderOrderedPacket( internalPacket->orderingIndex, waitingForSequencedPacketReadIndex[ internalPacket->orderingChannel ] ) == false )
{
statistics.sequencedMessagesInOrder++;
// Is this a split packet?
if ( internalPacket->splitPacketCount > 0 )
{
// Generate the split
// Verify some parameters to make sure we don't get junk data
// Check for a rebuilt packet
InsertIntoSplitPacketList( internalPacket, time );
// Sequenced
internalPacket = BuildPacketFromSplitPacketList( internalPacket->splitPacketId, time );
if ( internalPacket )
{
// Update our index to the newest packet
waitingForSequencedPacketReadIndex[ internalPacket->orderingChannel ] = internalPacket->orderingIndex + 1;
// If there is a rebuilt packet, add it to the output queue
outputQueue.Push( internalPacket );
internalPacket = 0;
}
// else don't have all the parts yet
}
else
{
// Update our index to the newest packet
waitingForSequencedPacketReadIndex[ internalPacket->orderingChannel ] = internalPacket->orderingIndex + 1;
// Not a split packet. Add the packet to the output queue
outputQueue.Push( internalPacket );
internalPacket = 0;
}
}
else
{
statistics.sequencedMessagesOutOfOrder++;
// Older sequenced packet. Discard it
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
}
goto CONTINUE_SOCKET_DATA_PARSE_LOOP;
}
// Is this an unsequenced split packet?
if ( internalPacket->splitPacketCount > 0 )
{
// An unsequenced split packet. May be ordered though.
// Check for a rebuilt packet
if ( internalPacket->reliability != RELIABLE_ORDERED )
internalPacket->orderingChannel = 255; // Use 255 to designate not sequenced and not ordered
InsertIntoSplitPacketList( internalPacket, time );
internalPacket = BuildPacketFromSplitPacketList( internalPacket->splitPacketId, time );
if ( internalPacket == 0 )
{
// Don't have all the parts yet
goto CONTINUE_SOCKET_DATA_PARSE_LOOP;
}
// else continue down to handle RELIABLE_ORDERED
#if defined(DEBUG_SPLIT_PACKET_PROBLEMS)
printf("%i,", internalPacket->orderingIndex);
#endif
}
if ( internalPacket->reliability == RELIABLE_ORDERED )
{
#ifdef _DEBUG
assert( internalPacket->orderingChannel < NUMBER_OF_ORDERED_STREAMS );
#endif
if ( internalPacket->orderingChannel >= NUMBER_OF_ORDERED_STREAMS )
{
#ifdef _DEBUG
//printf("Got invalid ordering channel %i from packet %i\n", internalPacket->orderingChannel, internalPacket->messageNumber);
#endif
// Invalid packet
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
goto CONTINUE_SOCKET_DATA_PARSE_LOOP;
}
if ( waitingForOrderedPacketReadIndex[ internalPacket->orderingChannel ] == internalPacket->orderingIndex )
{
// Get the list to hold ordered packets for this stream
DataStructures::LinkedList<InternalPacket*> *orderingListAtOrderingStream;
unsigned char orderingChannelCopy = internalPacket->orderingChannel;
statistics.orderedMessagesInOrder++;
// Show ordering index increment
//printf("Pushing immediate packet %i with ordering index %i\n", internalPacket->messageNumber, internalPacket->orderingIndex );
// Push the packet for the user to read
outputQueue.Push( internalPacket );
internalPacket = 0; // Don't reference this any longer since other threads access it
// Wait for the next ordered packet in sequence
waitingForOrderedPacketReadIndex[ orderingChannelCopy ] ++; // This wraps
orderingListAtOrderingStream = GetOrderingListAtOrderingStream( orderingChannelCopy );
if ( orderingListAtOrderingStream != 0)
{
while ( orderingListAtOrderingStream->Size() > 0 )
{
// Cycle through the list until nothing is found
orderingListAtOrderingStream->Beginning();
indexFound=false;
size=orderingListAtOrderingStream->Size();
count=0;
while (count++ < size)
{
if ( orderingListAtOrderingStream->Peek()->orderingIndex == waitingForOrderedPacketReadIndex[ orderingChannelCopy ] )
{
/*
RakNet::BitStream temp(orderingListAtOrderingStream->Peek()->data, BITS_TO_BYTES(orderingListAtOrderingStream->Peek()->dataBitLength), false);
temp.IgnoreBits(8);
unsigned int receivedPacketNumber=0;
temp.Read(receivedPacketNumber);
printf("Receive: receivedPacketNumber=%i orderingIndex=%i waitingFor=%i\n", receivedPacketNumber, orderingListAtOrderingStream->Peek()->orderingIndex, waitingForOrderedPacketReadIndex[ orderingChannelCopy ]);
*/
//printf("Pushing delayed packet %i with ordering index %i. outputQueue.Size()==%i\n", orderingListAtOrderingStream->Peek()->messageNumber, orderingListAtOrderingStream->Peek()->orderingIndex, outputQueue.Size() );
outputQueue.Push( orderingListAtOrderingStream->Pop() );
waitingForOrderedPacketReadIndex[ orderingChannelCopy ]++;
indexFound=true;
}
else
(*orderingListAtOrderingStream)++;
}
if (indexFound==false)
break;
}
}
internalPacket = 0;
}
else
{
#if defined(DEBUG_SPLIT_PACKET_PROBLEMS)
if (internalPacket->splitPacketCount>0)
printf("Split packet OOO. Waiting=%i. Got=%i\n", waitingForOrderedPacketReadIndex[ internalPacket->orderingChannel ], internalPacket->orderingIndex);
waitFlag=internalPacket->splitPacketId;
#endif
// assert(waitingForOrderedPacketReadIndex[ internalPacket->orderingChannel ] < internalPacket->orderingIndex);
statistics.orderedMessagesOutOfOrder++;
// This is a newer ordered packet than we are waiting for. Store it for future use
AddToOrderingList( internalPacket );
}
goto CONTINUE_SOCKET_DATA_PARSE_LOOP;
}
// Nothing special about this packet. Add it to the output queue
outputQueue.Push( internalPacket );
internalPacket = 0;
}
// Used for a goto to jump to the next packet immediately
CONTINUE_SOCKET_DATA_PARSE_LOOP:
// Parse the bitstream to create an internal packet
internalPacket = CreateInternalPacketFromBitStream( &socketData, time );
}
/*
if (numberOfAcksInFrame > 0)
// if (time > lastWindowAdjustTime+ping)
{
// printf("Window size up\n");
windowSize+=1 + numberOfAcksInFrame/windowSize;
if ( windowSize > MAXIMUM_WINDOW_SIZE )
windowSize = MAXIMUM_WINDOW_SIZE;
//lastWindowAdjustTime=time;
}
//else
// printf("No acks in frame\n");
*/
/*
// numberOfAcksInFrame>=windowSize means that all the packets we last sent from the resendList are cleared out
// 11/17/05 - the problem with numberOfAcksInFrame >= windowSize is that if the entire frame is filled with resends but not all resends filled the frame
// then the sender is limited by how many resends can fit in one frame
if ( numberOfAcksInFrame >= windowSize && ( sendPacketSet[ SYSTEM_PRIORITY ].Size() > 0 || sendPacketSet[ HIGH_PRIORITY ].Size() > 0 || sendPacketSet[ MEDIUM_PRIORITY ].Size() > 0 ) )
{
// reliabilityLayerMutexes[windowSize_MUTEX].Lock();
//printf("windowSize=%i lossyWindowSize=%i\n", windowSize, lossyWindowSize);
if ( windowSize < lossyWindowSize || (time>lastWindowIncreaseSizeTime && time-lastWindowIncreaseSizeTime>lostPacketResendDelay*2) ) // Increases the window size slowly, testing for packetloss
{
// If we get a frame which clears out the resend queue after handling one or more acks, and we have packets waiting to go out,
// and we didn't recently lose a packet then increase the window size by 1
windowSize++;
if ( (time>lastWindowIncreaseSizeTime && time-lastWindowIncreaseSizeTime>lostPacketResendDelay*2) ) // The increase is to test for packetloss
lastWindowIncreaseSizeTime = time;
// If the window is so large that we couldn't possibly fit any more packets into the frame, then just leave it alone
if ( windowSize > MAXIMUM_WINDOW_SIZE )
windowSize = MAXIMUM_WINDOW_SIZE;
// SHOW - WINDOWING
//else
// printf("Increasing windowSize to %i. Lossy window size = %i\n", windowSize, lossyWindowSize);
// If we are more than 5 over the lossy window size, increase the lossy window size by 1
if ( windowSize == MAXIMUM_WINDOW_SIZE || windowSize - lossyWindowSize > 5 )
lossyWindowSize++;
}
// reliabilityLayerMutexes[windowSize_MUTEX].Unlock();
}
*/
if (hasAcks)
{
UpdateWindowFromAck(time);
}
receivePacketCount++;
return true;
}
//-------------------------------------------------------------------------------------------------------
// This gets an end-user packet already parsed out. Returns number of BITS put into the buffer
//-------------------------------------------------------------------------------------------------------
BitSize_t ReliabilityLayer::Receive( unsigned char **data )
{
// Wait until the clear occurs
if (freeThreadedMemoryOnNextUpdate)
return 0;
InternalPacket * internalPacket;
if ( outputQueue.Size() > 0 )
{
// #ifdef _DEBUG
// assert(bitStream->GetNumberOfBitsUsed()==0);
// #endif
internalPacket = outputQueue.Pop();
BitSize_t bitLength;
*data = internalPacket->data;
bitLength = internalPacket->dataBitLength;
internalPacketPool.Release( internalPacket );
return bitLength;
}
else
{
return 0;
}
}
//-------------------------------------------------------------------------------------------------------
// Puts data on the send queue
// bitStream contains the data to send
// priority is what priority to send the data at
// reliability is what reliability to use
// ordering channel is from 0 to 255 and specifies what stream to use
//-------------------------------------------------------------------------------------------------------
bool ReliabilityLayer::Send( char *data, BitSize_t numberOfBitsToSend, PacketPriority priority, PacketReliability reliability, unsigned char orderingChannel, bool makeDataCopy, int MTUSize, RakNetTimeNS currentTime )
{
#ifdef _DEBUG
assert( !( reliability > RELIABLE_SEQUENCED || reliability < 0 ) );
assert( !( priority > NUMBER_OF_PRIORITIES || priority < 0 ) );
assert( !( orderingChannel >= NUMBER_OF_ORDERED_STREAMS ) );
assert( numberOfBitsToSend > 0 );
#endif
// int a = BITS_TO_BYTES(numberOfBitsToSend);
// Fix any bad parameters
if ( reliability > RELIABLE_SEQUENCED || reliability < 0 )
reliability = RELIABLE;
if ( priority > NUMBER_OF_PRIORITIES || priority < 0 )
priority = HIGH_PRIORITY;
if ( orderingChannel >= NUMBER_OF_ORDERED_STREAMS )
orderingChannel = 0;
// For the first 60 seconds of a new connection, send everything reliable, so that acks arrive and available bandwidth can be determined.
if (currentTime-(RakNetTimeNS)statistics.connectionStartTime*(RakNetTimeNS)1000 < (RakNetTimeNS)60000000)
{
if (reliability==UNRELIABLE)
reliability=RELIABLE;
else if (reliability==UNRELIABLE_SEQUENCED)
reliability=RELIABLE_ORDERED;
}
unsigned int numberOfBytesToSend=(unsigned int) BITS_TO_BYTES(numberOfBitsToSend);
if ( numberOfBitsToSend == 0 )
{
#ifdef _DEBUG
// printf( "Error!! ReliabilityLayer::Send bitStream->GetNumberOfBytesUsed()==0\n" );
#endif
return false;
}
InternalPacket * internalPacket = internalPacketPool.Allocate();
if (internalPacket==0)
{
notifyOutOfMemory(__FILE__, __LINE__);
return false; // Out of memory
}
//InternalPacket * internalPacket = sendPacketSet[priority].WriteLock();
#ifdef _DEBUG
// Remove accessing undefined memory warning
memset( internalPacket, 255, sizeof( InternalPacket ) );
#endif
internalPacket->creationTime = currentTime;
if ( makeDataCopy )
{
internalPacket->data = (unsigned char*) rakMalloc( numberOfBytesToSend );
memcpy( internalPacket->data, data, numberOfBytesToSend );
// printf("Allocated %i\n", internalPacket->data);
}
else
{
// Allocated the data elsewhere, delete it in here
internalPacket->data = ( unsigned char* ) data;
// printf("Using Pre-Allocated %i\n", internalPacket->data);
}
internalPacket->dataBitLength = numberOfBitsToSend;
internalPacket->nextActionTime = 0;
// printf("%i\n", messageNumber);
//internalPacket->messageNumber = sendMessageNumberIndex;
internalPacket->messageNumber = (MessageNumberType) -1;
internalPacket->messageNumberAssigned=false;
internalPacket->messageInternalOrder = internalOrderIndex++;
internalPacket->priority = priority;
internalPacket->reliability = reliability;
internalPacket->splitPacketCount = 0;
// Calculate if I need to split the packet
int headerLength = BITS_TO_BYTES( GetBitStreamHeaderLength( internalPacket ) );
unsigned int maxDataSize = MTUSize - UDP_HEADER_SIZE - headerLength;
if ( encryptor.IsKeySet() )
maxDataSize -= 16; // Extra data for the encryptor
bool splitPacket = numberOfBytesToSend > maxDataSize;
// If a split packet, we might have to upgrade the reliability
if ( splitPacket )
statistics.numberOfSplitMessages++;
else
statistics.numberOfUnsplitMessages++;
// ++sendMessageNumberIndex;
if ( internalPacket->reliability == RELIABLE_SEQUENCED || internalPacket->reliability == UNRELIABLE_SEQUENCED )
{
// Assign the sequence stream and index
internalPacket->orderingChannel = orderingChannel;
internalPacket->orderingIndex = waitingForSequencedPacketWriteIndex[ orderingChannel ] ++;
// This packet supersedes all other sequenced packets on the same ordering channel
// Delete all packets in all send lists that are sequenced and on the same ordering channel
// UPDATE:
// Disabled. We don't have enough info to consistently do this. Sometimes newer data does supercede
// older data such as with constantly declining health, but not in all cases.
// For example, with sequenced unreliable sound packets just because you send a newer one doesn't mean you
// don't need the older ones because the odds are they will still arrive in order
/*
for (int i=0; i < NUMBER_OF_PRIORITIES; i++)
{
DeleteSequencedPacketsInList(orderingChannel, sendQueue[i]);
}
*/
}
else
if ( internalPacket->reliability == RELIABLE_ORDERED )
{
// Assign the ordering channel and index
internalPacket->orderingChannel = orderingChannel;
internalPacket->orderingIndex = waitingForOrderedPacketWriteIndex[ orderingChannel ] ++;
}
if ( splitPacket ) // If it uses a secure header it will be generated here
{
// Must split the packet. This will also generate the SHA1 if it is required. It also adds it to the send list.
//InternalPacket packetCopy;
//memcpy(&packetCopy, internalPacket, sizeof(InternalPacket));
//sendPacketSet[priority].CancelWriteLock(internalPacket);
//SplitPacket( &packetCopy, MTUSize );
SplitPacket( internalPacket, MTUSize );
//delete [] packetCopy.data;
return true;
}
sendPacketSet[ internalPacket->priority ].Push( internalPacket );
// sendPacketSet[priority].WriteUnlock();
return true;
}
//-------------------------------------------------------------------------------------------------------
// Run this once per game cycle. Handles internal lists and actually does the send
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::Update( SOCKET s, SystemAddress systemAddress, int MTUSize, RakNetTimeNS time,
unsigned bitsPerSecondLimit,
DataStructures::List<PluginInterface*> &messageHandlerList )
{
// Debug memory leaks
/*
if (0)
{
printf("orderingList.Size()=%i\n", orderingList.Size());
printf("outputQueue.Size()=%i\n", outputQueue.Size());
printf("acknowlegements.Size()=%i\n", acknowlegements.Size());
printf("resendList.Size()=%i\n", resendList.Size());
printf("resendQueue.Size()=%i\n", resendQueue.Size());
for (int i=0; i < NUMBER_OF_PRIORITIES; i++)
printf("sendPacketSet[%i].Size()=%i\n", i, sendPacketSet[i].Size());
printf("splitPacketChannelList.Size()=%i\n", splitPacketChannelList.Size());
printf("hasReceivedPacketQueue.Size()=%i\n", hasReceivedPacketQueue.Size());
#ifndef _RELEASE
printf("delayList.Size()=%i\n", delayList.Size());
#endif
printf("internalPacketPool.GetAvailablePagesSize()=%i\n", internalPacketPool.GetAvailablePagesSize());
printf("internalPacketPool.GetUnavailablePagesSize()=%i\n", internalPacketPool.GetUnavailablePagesSize());
printf("internalPacketPool.GetMemoryPoolPageSize()=%i\n", internalPacketPool.GetMemoryPoolPageSize());
printf("sendMessageNumberIndex=%i\n", sendMessageNumberIndex);
printf("deadConnection=%i\n", deadConnection);
printf("cheater=%i\n", cheater);
printf("splitPacketId=%i\n", splitPacketId);
printf("blockWindowIncreaseUntilTime=%i\n", blockWindowIncreaseUntilTime);
printf("receivedPacketsBaseIndex=%i\n", receivedPacketsBaseIndex);
printf("lastUpdateTime=%I64u\n", lastUpdateTime);
printf("timeBetweenPackets=%I64u\n", timeBetweenPackets);
printf("nextSendTime=%I64u\n", nextSendTime);
printf("ackPing=%I64u\n", ackPing);
printf("ackPingSum=%I64u\n", ackPingSum);
printf("ackPingIndex=%i\n", ackPingIndex);
printf("continuousSend=%i\n", continuousSend);
printf("sendPacketCount=%i\n", sendPacketCount);
printf("receivePacketCount=%i\n", receivePacketCount);
char buffer[10000];
StatisticsToString( &statistics, buffer, 2 );
printf("%s\n", buffer);
}
*/
// This line is necessary because the timer isn't accurate
if (time <= lastUpdateTime)
{
// Always set the last time in case of overflow
lastUpdateTime=time;
return;
}
RakNetTimeNS elapsed = time - lastUpdateTime;
lastUpdateTime=time;
UpdateThreadedMemory();
// Due to thread vagarities and the way I store the time to avoid slow calls to RakNet::GetTime
// time may be less than lastAck
if ( resendList.IsEmpty()==false && AckTimeout(time) )
{
// SHOW - dead connection
// printf("The connection has been lost.\n");
// We've waited a very long time for a reliable packet to get an ack and it never has
deadConnection = true;
return;
}
if (time >= histogramStart + HISTOGRAM_RESTART_CYCLE)
{
histogramStart=time;
histogramBitsSent=0;
}
bool limitThroughput;
if (bitsPerSecondLimit==0 || throughputCapCountdown <= 0)
limitThroughput=false;
else
{
throughputCapCountdown-=elapsed;
if (throughputCapCountdown<0)
{
limitThroughput=false;
throughputCapCountdown=0;
}
else
{
limitThroughput=true;
continuousSend=false; // Blocked from sending due to throughput limit, so not sending continuously
}
}
const int maxDataBitSize = BYTES_TO_BITS((MTUSize - UDP_HEADER_SIZE));
bool hitMTUCap;
bool reliableDataSent;
RakNetTimeNS usedTime;
#ifdef _ENABLE_FLOW_CONTROL
RakNetTimeNS availableTime;
if (limitThroughput==false)
{
if (time >= nextSendTime)
{
hitMTUCap=false;
usedTime=(RakNetTimeNS)0;
availableTime = time - nextSendTime;
if (availableTime > MAX_TIME_BETWEEN_PACKETS)
availableTime=MAX_TIME_BETWEEN_PACKETS;
while ( usedTime <= availableTime )
{
#else
while (1)
{
#endif
(void) reliableDataSent;
updateBitStream.Reset();
if ( GenerateDatagram( &updateBitStream, MTUSize, &reliableDataSent, time, systemAddress, &hitMTUCap, messageHandlerList ) )
{
#ifndef _RELEASE
if (minExtraPing > 0 || extraPingVariance > 0)
{
// Delay the send to simulate lag
DataAndTime *dt;
dt = new DataAndTime;
memcpy( dt->data, updateBitStream.GetData(), (size_t) updateBitStream.GetNumberOfBytesUsed() );
dt->length = (unsigned int) updateBitStream.GetNumberOfBytesUsed();
dt->sendTime = time + (RakNetTimeNS)minExtraPing*1000;
if (extraPingVariance > 0)
dt->sendTime += ( randomMT() % (int)extraPingVariance );
delayList.Insert( dt );
}
else
#endif
{
SendBitStream( s, systemAddress, &updateBitStream );
}
#ifdef _ENABLE_FLOW_CONTROL
if (bitsPerSecondLimit > 0)
{
throughputCapCountdown+=(RakNetTimeNS)(1000000.0 * (double) updateBitStream.GetNumberOfBitsUsed() / (double) bitsPerSecondLimit);
// Prevent sending a large burst and then doing nothing for a long time
if (throughputCapCountdown>30000)
break;
}
if (hitMTUCap)
usedTime+=timeBetweenPackets;
else
usedTime+=(RakNetTimeNS)((long double) timeBetweenPackets * ((long double) updateBitStream.GetNumberOfBitsUsed() / (long double) maxDataBitSize));
#endif
}
else
break;
}
#ifdef _ENABLE_FLOW_CONTROL
if ( nextSendTime + MAX_TIME_BETWEEN_PACKETS < time )
{
// Long time since last send
nextSendTime=time+usedTime;
continuousSend=false;
}
else
{
nextSendTime+=usedTime;
if (nextSendTime>time)
{
continuousSend=true;
}
else
{
nextSendTime+=usedTime;
if (nextSendTime<time)
nextSendTime=time;
continuousSend=false;
}
}
}
else
{
// Send acks only
if (acknowlegements.Size()>0)
{
updateBitStream.Reset();
updateBitStream.Write(true);
updateBitStream.Write(remoteSystemTime);
BitSize_t bitsSent = acknowlegements.Serialize(&updateBitStream, (MTUSize-UDP_HEADER_SIZE)*8-1, true);
statistics.acknowlegementBitsSent +=bitsSent;
SendBitStream( s, systemAddress, &updateBitStream );
if (bitsPerSecondLimit > 0)
{
throughputCapCountdown+=(RakNetTimeNS)(1000000.0 * (double) updateBitStream.GetNumberOfBitsUsed() / (double) bitsPerSecondLimit);
}
}
}
}
#endif
#ifndef _RELEASE
// Do any lagged sends
unsigned i = 0;
while ( i < delayList.Size() )
{
if ( delayList[ i ]->sendTime < time )
{
updateBitStream.Reset();
updateBitStream.Write( delayList[ i ]->data, delayList[ i ]->length );
// Send it now
SendBitStream( s, systemAddress, &updateBitStream );
delete delayList[ i ];
if (i != delayList.Size() - 1)
delayList[ i ] = delayList[ delayList.Size() - 1 ];
delayList.RemoveFromEnd();
}
else
i++;
}
#endif
// Keep on top of deleting old unreliable split packets so they don't clog the list.
DeleteOldUnreliableSplitPackets( time );
}
//-------------------------------------------------------------------------------------------------------
// Writes a bitstream to the socket
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::SendBitStream( SOCKET s, SystemAddress systemAddress, RakNet::BitStream *bitStream )
{
// SHOW - showing reliable flow
// if (bitStream->GetNumberOfBytesUsed()>50)
// printf("Sending %i bytes. sendQueue[0].Size()=%i, resendList.Size()=%i\n", bitStream->GetNumberOfBytesUsed(), sendQueue[0].Size(),resendList.Size());
unsigned int oldLength, length;
// sentFrames++;
#ifndef _RELEASE
if (maxSendBPS>0)
{
// double chanceToLosePacket = (double)currentBandwidth / (double)maxSendBPS;
// if (frandomMT() < (float)chanceToLosePacket)
// return;
}
#endif
// REMOVEME
// if (frandomMT() < .15f)
// return;
// Encode the whole bitstream if the encoder is defined.
if ( encryptor.IsKeySet() )
{
length = (unsigned int) bitStream->GetNumberOfBytesUsed();
oldLength = length;
encryptor.Encrypt( ( unsigned char* ) bitStream->GetData(), length, ( unsigned char* ) bitStream->GetData(), &length );
statistics.encryptionBitsSent = BYTES_TO_BITS( length - oldLength );
assert( ( length % 16 ) == 0 );
}
else
{
length = (unsigned int) bitStream->GetNumberOfBytesUsed();
}
statistics.packetsSent++;
statistics.totalBitsSent += length * 8;
histogramBitsSent += length * 8;
//printf("total bits=%i length=%i\n", BITS_TO_BYTES(statistics.totalBitsSent), length);
SocketLayer::Instance()->SendTo( s, ( char* ) bitStream->GetData(), length, systemAddress.binaryAddress, systemAddress.port );
// lastPacketSendTime=time;
}
//-------------------------------------------------------------------------------------------------------
// Generates a datagram (coalesced packets)
//-------------------------------------------------------------------------------------------------------
bool ReliabilityLayer::GenerateDatagram( RakNet::BitStream *output, int MTUSize, bool *reliableDataSent, RakNetTimeNS time, SystemAddress systemAddress, bool *hitMTUCap, DataStructures::List<PluginInterface*> &messageHandlerList )
{
InternalPacket * internalPacket;
// InternalPacket *temp;
BitSize_t maxDataBitSize;
BitSize_t reliableBits = 0;
BitSize_t nextPacketBitLength;
unsigned i, messageHandlerIndex;
bool isReliable, onlySendUnreliable;
//bool writeFalseToHeader;
bool wroteAcks;
bool wroteData;
unsigned messagesSent=0;
*hitMTUCap=false;
maxDataBitSize = MTUSize - UDP_HEADER_SIZE;
if ( encryptor.IsKeySet() )
maxDataBitSize -= 16; // Extra data for the encryptor
maxDataBitSize <<= 3;
*reliableDataSent = false;
if (acknowlegements.Size()>0)
{
output->Write(true);
output->Write(remoteSystemTime);
messagesSent++;
wroteAcks=true;
statistics.acknowlegementBitsSent +=acknowlegements.Serialize(output, (MTUSize-UDP_HEADER_SIZE)*8-1, true);
// writeFalseToHeader=false;
}
else
{
wroteAcks=false;
output->Write(false);
// writeFalseToHeader=true;
}
wroteData=false;
while ( resendQueue.Size() > 0 )
{
internalPacket = resendQueue.Peek();
RakAssert(internalPacket->messageNumberAssigned==true);
// The resend Queue can have holes. This is so we can deallocate blocks without having to compress the array
if ( internalPacket->nextActionTime == 0 )
{
if (packetlossThisSampleResendCount>0)
packetlossThisSampleResendCount--;
resendQueue.Pop();
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
continue; // This was a hole
}
if ( resendQueue.Peek()->nextActionTime < time )
{
internalPacket = resendQueue.Pop();
nextPacketBitLength = GetBitStreamHeaderLength( internalPacket ) + internalPacket->dataBitLength;
if ( output->GetNumberOfBitsUsed() + nextPacketBitLength > maxDataBitSize )
{
resendQueue.PushAtHead( internalPacket ); // Not enough room to use this packet after all!
*hitMTUCap=true;
goto END_OF_GENERATE_FRAME;
}
RakAssert(internalPacket->priority >= 0);
#ifdef _DEBUG_LOGGER
{
char temp[256];
sprintf(temp, "%p: Resending packet %i data: %i bitlen: %i\n", this, internalPacket->messageNumber, (unsigned char) internalPacket->data[0], internalPacket->dataBitLength);
OutputDebugStr(temp);
}
#endif
for (messageHandlerIndex=0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++)
messageHandlerList[messageHandlerIndex]->OnInternalPacket(internalPacket, sendPacketCount, systemAddress, (RakNetTime)(time/(RakNetTimeNS)1000), true);
// Write to the output bitstream
statistics.messageResends++;
statistics.messageDataBitsResent += internalPacket->dataBitLength;
// if (writeFalseToHeader)
// {
// output->Write(false);
// writeFalseToHeader=false;
// }
if (wroteData==false)
{
wroteData=true;
output->Write(true);
// Write our own system time for ping calculations for flow control
output->Write((RemoteSystemTimeType)(time / (RakNetTimeNS)1000));
}
statistics.messagesTotalBitsResent += WriteToBitStreamFromInternalPacket( output, internalPacket, time );
internalPacket->packetNumber=sendPacketCount;
messagesSent++;
*reliableDataSent = true;
statistics.packetsContainingOnlyAcknowlegementsAndResends++;
// printf("internalPacket->messageNumber=%i time=%i timeBetween=%i\n", internalPacket->messageNumber, (RakNetTime)(time/(RakNetTimeNS)1000), (RakNetTime)(timeBetweenPackets/(RakNetTimeNS)1000));
// Using a one second resend for the 2nd resend on fixes abnormal disconnections due to flooding
internalPacket->nextActionTime = time + (RakNetTimeNS)1000000;
//printf("PACKETLOSS\n ");
packetlossThisSample=true;
//printf("packetlossThisSample=true\n");
if (packetlossThisSampleResendCount==0)
{
backoffThisSample=true;
packetlossThisSampleResendCount=resendQueue.Size();
}
else
{
packetlossThisSampleResendCount--;
}
// Put the packet back into the resend list at the correct spot
// Don't make a copy since I'm reinserting an allocated struct
InsertPacketIntoResendList( internalPacket, time, false, false );
}
else
{
break;
}
}
onlySendUnreliable = false;
// From highest to lowest priority, fill up the output bitstream from the send lists
for ( i = 0; i < NUMBER_OF_PRIORITIES; i++ )
{
while ( sendPacketSet[ i ].Size() )
{
internalPacket = sendPacketSet[ i ].Pop();
// REMOVEME
// if (internalPacket->messageNumber > 30000)
// {
// int a=5;
// }
nextPacketBitLength = GetBitStreamHeaderLength( internalPacket ) + internalPacket->dataBitLength;
if (unreliableTimeout!=0 &&
(internalPacket->reliability==UNRELIABLE || internalPacket->reliability==UNRELIABLE_SEQUENCED) &&
time > internalPacket->creationTime+(RakNetTimeNS)unreliableTimeout)
{
// Unreliable packets are deleted
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
continue;
}
if ( output->GetNumberOfBitsUsed() + nextPacketBitLength > maxDataBitSize )
{
// This output won't fit.
*hitMTUCap=true;
sendPacketSet[ i ].PushAtHead( internalPacket ); // Push this back at the head so it is the next thing to go out
break;
}
if ( internalPacket->reliability == RELIABLE || internalPacket->reliability == RELIABLE_SEQUENCED || internalPacket->reliability == RELIABLE_ORDERED )
isReliable = true;
else
isReliable = false;
// Write to the output bitstream
statistics.messagesSent[ i ] ++;
statistics.messageDataBitsSent[ i ] += internalPacket->dataBitLength;
#ifdef _DEBUG_LOGGER
{
char temp[256];
sprintf(temp, "%p: Sending packet %i data: %i bitlen: %i\n", this, internalPacket->messageNumber, (unsigned char) internalPacket->data[0], internalPacket->dataBitLength);
OutputDebugStr(temp);
}
#endif
for (messageHandlerIndex=0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++)
messageHandlerList[messageHandlerIndex]->OnInternalPacket(internalPacket, sendPacketCount, systemAddress, (RakNetTime)(time/(RakNetTimeNS)1000), true);
// if (writeFalseToHeader)
// {
// output->Write(false);
// writeFalseToHeader=false;
// }
if (wroteData==false)
{
wroteData=true;
output->Write(true);
// Write our own system time for ping calculations for flow control
output->Write((RemoteSystemTimeType)(time / (RakNetTimeNS)1000));
}
// I assign the message number in the order the messages are sent, rather than the order they are created.
// This fixes a bug where I was formerly creating a huge number of split packets, then sending on a different ordering channel on a higher priority.
// This would cause a huge gap on the recipient for receivedPacketsBaseIndex causing performance problems and data timeout
RakAssert(internalPacket->messageNumber==(MessageNumberType)-1);
RakAssert(internalPacket->messageNumberAssigned==false);
internalPacket->messageNumberAssigned=true;
internalPacket->messageNumber=sendMessageNumberIndex;
sendMessageNumberIndex++;
#if defined (DEBUG_SPLIT_PACKET_PROBLEMS)
// if (internalPacket->splitPacketId!=66)
#endif
statistics.messageTotalBitsSent[ i ] += WriteToBitStreamFromInternalPacket( output, internalPacket, time );
//output->PrintBits();
internalPacket->packetNumber=sendPacketCount;
messagesSent++;
if ( isReliable )
{
// Reliable packets are saved to resend later
reliableBits += internalPacket->dataBitLength;
// printf("internalPacket->messageNumber=%i time=%i timeBetween=%i\n", internalPacket->messageNumber, (RakNetTime)(time/(RakNetTimeNS)1000), (RakNetTime)(timeBetweenPackets/(RakNetTimeNS)1000));
if (ackPingSum==0)
internalPacket->nextActionTime = time + (RakNetTimeNS)1000000;
else
internalPacket->nextActionTime = time + (RakNetTimeNS)100000 + (ackPingSum>>7);
#if defined (DEBUG_SPLIT_PACKET_PROBLEMS)
// if (internalPacket->splitPacketId==66)
// internalPacket->nextActionTime+=1000000;
#endif
resendList.Insert( internalPacket->messageNumber, internalPacket);
//printf("ackTimeIncrement=%i\n", ackTimeIncrement/1000);
InsertPacketIntoResendList( internalPacket, time, false, true);
*reliableDataSent = true;
}
else
{
// Unreliable packets are deleted
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
}
}
}
END_OF_GENERATE_FRAME:
;
// if (output->GetNumberOfBitsUsed()>0)
// {
// Update the throttle with the header
// bytesSent+=output->GetNumberOfBytesUsed() + UDP_HEADER_SIZE;
//}
if (wroteData==false)
{
output->Write(false);
}
if (wroteAcks || wroteData)
sendPacketCount++;
return wroteAcks || wroteData;
}
//-------------------------------------------------------------------------------------------------------
// Are we waiting for any data to be sent out or be processed by the player?
//-------------------------------------------------------------------------------------------------------
bool ReliabilityLayer::IsOutgoingDataWaiting(void)
{
unsigned i;
for ( i = 0; i < NUMBER_OF_PRIORITIES; i++ )
{
if (sendPacketSet[ i ].Size() > 0)
return true;
}
return acknowlegements.Size() > 0 || resendList.IsEmpty()==false;// || outputQueue.Size() > 0 || orderingList.Size() > 0 || splitPacketChannelList.Size() > 0;
}
bool ReliabilityLayer::IsReliableOutgoingDataWaiting(void)
{
unsigned i,j;
for ( i = 0; i < NUMBER_OF_PRIORITIES; i++ )
{
for (j=0; j < sendPacketSet[ i ].Size(); j++)
{
if (sendPacketSet[ i ][ j ]->reliability==RELIABLE_ORDERED ||
sendPacketSet[ i ][ j ]->reliability==RELIABLE_SEQUENCED ||
sendPacketSet[ i ][ j ]->reliability==RELIABLE)
return true;
}
}
return /*acknowlegements.Size() > 0 ||*/ resendList.IsEmpty()==false;// || outputQueue.Size() > 0 || orderingList.Size() > 0 || splitPacketChannelList.Size() > 0;
}
bool ReliabilityLayer::AreAcksWaiting(void)
{
return acknowlegements.Size() > 0;
}
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::ApplyNetworkSimulator( double _maxSendBPS, RakNetTime _minExtraPing, RakNetTime _extraPingVariance )
{
#ifndef _RELEASE
maxSendBPS=_maxSendBPS;
minExtraPing=_minExtraPing;
extraPingVariance=_extraPingVariance;
// if (ping < (unsigned int)(minExtraPing+extraPingVariance)*2)
// ping=(minExtraPing+extraPingVariance)*2;
#endif
}
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::SetSplitMessageProgressInterval(int interval)
{
splitMessageProgressInterval=interval;
}
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::SetUnreliableTimeout(RakNetTime timeoutMS)
{
unreliableTimeout=(RakNetTimeNS)timeoutMS*(RakNetTimeNS)1000;
}
//-------------------------------------------------------------------------------------------------------
// This will return true if we should not send at this time
//-------------------------------------------------------------------------------------------------------
bool ReliabilityLayer::IsSendThrottled( int MTUSize )
{
(void) MTUSize;
return false;
// return resendList.Size() > windowSize;
// Disabling this, because it can get stuck here forever
/*
unsigned packetsWaiting;
unsigned resendListDataSize=0;
unsigned i;
for (i=0; i < resendList.Size(); i++)
{
if (resendList[i])
resendListDataSize+=resendList[i]->dataBitLength;
}
packetsWaiting = 1 + ((BITS_TO_BYTES(resendListDataSize)) / (MTUSize - UDP_HEADER_SIZE - 10)); // 10 to roughly estimate the raknet header
return packetsWaiting >= windowSize;
*/
}
//-------------------------------------------------------------------------------------------------------
// We lost a packet
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::UpdateWindowFromPacketloss( RakNetTimeNS time )
{
(void) time;
}
//-------------------------------------------------------------------------------------------------------
// Increase the window size
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::UpdateWindowFromAck( RakNetTimeNS time )
{
(void) time;
}
//-------------------------------------------------------------------------------------------------------
// Does what the function name says
//-------------------------------------------------------------------------------------------------------
unsigned ReliabilityLayer::RemovePacketFromResendListAndDeleteOlderReliableSequenced( const MessageNumberType messageNumber, RakNetTimeNS time )
{
(void) time;
InternalPacket * internalPacket;
//InternalPacket *temp;
PacketReliability reliability; // What type of reliability algorithm to use with this packet
unsigned char orderingChannel; // What ordering channel this packet is on, if the reliability type uses ordering channels
OrderingIndexType orderingIndex; // The ID used as identification for ordering channels
// unsigned j;
bool deleted;
deleted=resendList.Delete(messageNumber, internalPacket);
if (deleted)
{
reliability = internalPacket->reliability;
orderingChannel = internalPacket->orderingChannel;
orderingIndex = internalPacket->orderingIndex;
// delete [] internalPacket->data;
// internalPacketPool.ReleasePointer( internalPacket );
internalPacket->nextActionTime=0; // Will be freed in the update function
return 0;
// Rarely used and thus disabled for speed
/*
// If the deleted packet was reliable sequenced, also delete all older reliable sequenced resends on the same ordering channel.
// This is because we no longer need to send these.
if ( reliability == RELIABLE_SEQUENCED )
{
unsigned j = 0;
while ( j < resendList.Size() )
{
internalPacket = resendList[ j ];
if ( internalPacket && internalPacket->reliability == RELIABLE_SEQUENCED && internalPacket->orderingChannel == orderingChannel && IsOlderOrderedPacket( internalPacket->orderingIndex, orderingIndex ) )
{
// Delete the packet
delete [] internalPacket->data;
internalPacketPool.ReleasePointer( internalPacket );
resendList[ j ] = 0; // Generate a hole
}
j++;
}
}
*/
}
else
{
statistics.duplicateAcknowlegementsReceived++;
}
return (unsigned)-1;
}
//-------------------------------------------------------------------------------------------------------
// Acknowledge receipt of the packet with the specified messageNumber
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::SendAcknowledgementPacket( const MessageNumberType messageNumber, RakNetTimeNS time )
{
(void) time;
statistics.acknowlegementsSent++;
acknowlegements.Insert(messageNumber);
}
//-------------------------------------------------------------------------------------------------------
// Parse an internalPacket and figure out how many header bits would be
// written. Returns that number
//-------------------------------------------------------------------------------------------------------
int ReliabilityLayer::GetBitStreamHeaderLength( const InternalPacket *const internalPacket )
{
#ifdef _DEBUG
assert( internalPacket );
#endif
int bitLength;
bitLength=sizeof(MessageNumberType)*8;
// Write the PacketReliability. This is encoded in 3 bits
//bitStream->WriteBits((unsigned char*)&(internalPacket->reliability), 3, true);
bitLength += 3;
// If the reliability requires an ordering channel and ordering index, we Write those.
if ( internalPacket->reliability == UNRELIABLE_SEQUENCED || internalPacket->reliability == RELIABLE_SEQUENCED || internalPacket->reliability == RELIABLE_ORDERED )
{
// ordering channel encoded in 5 bits (from 0 to 31)
//bitStream->WriteBits((unsigned char*)&(internalPacket->orderingChannel), 5, true);
bitLength+=5;
// ordering index is one byte
//bitStream->WriteCompressed(internalPacket->orderingIndex);
bitLength+=sizeof(OrderingIndexType)*8;
}
// if (internalPacket->reliability == RELIABLE || internalPacket->reliability == RELIABLE_ORDERED || internalPacket->reliability==RELIABLE_SEQUENCED)
// bitLength+=8*sizeof(RemoteSystemTimeType);
// Write if this is a split packet (1 bit)
bool isSplitPacket = internalPacket->splitPacketCount > 0;
//bitStream->Write(isSplitPacket);
bitLength += 1;
if ( isSplitPacket )
{
// split packet indices are two bytes (so one packet can be split up to 65535
// times - maximum packet size would be about 500 * 65535)
//bitStream->Write(internalPacket->splitPacketId);
//bitStream->WriteCompressed(internalPacket->splitPacketIndex);
//bitStream->WriteCompressed(internalPacket->splitPacketCount);
bitLength += (sizeof(SplitPacketIdType) + sizeof(SplitPacketIndexType) * 2) * 8;
}
// Write how many bits the packet data is. Stored in an unsigned short and
// read from 16 bits
//bitStream->WriteBits((unsigned char*)&(internalPacket->dataBitLength), 16, true);
// Read how many bits the packet data is. Stored in 16 bits
bitLength += 16;
// Byte alignment
//bitLength += 8 - ((bitLength -1) %8 + 1);
return bitLength;
}
//-------------------------------------------------------------------------------------------------------
// Parse an internalPacket and create a bitstream to represent this data
//-------------------------------------------------------------------------------------------------------
BitSize_t ReliabilityLayer::WriteToBitStreamFromInternalPacket( RakNet::BitStream *bitStream, const InternalPacket *const internalPacket, RakNetTimeNS curTime )
{
(void) curTime;
#ifdef _DEBUG
assert( bitStream && internalPacket );
#endif
BitSize_t start = bitStream->GetNumberOfBitsUsed();
const unsigned char c = (unsigned char) internalPacket->reliability;
// testing
//if (internalPacket->reliability==UNRELIABLE)
// printf("Sending unreliable packet %i\n", internalPacket->messageNumber);
//else if (internalPacket->reliability==RELIABLE_SEQUENCED || internalPacket->reliability==RELIABLE_ORDERED || internalPacket->reliability==RELIABLE)
// printf("Sending reliable packet number %i\n", internalPacket->messageNumber);
//bitStream->AlignWriteToByteBoundary();
// Write the message number (2 bytes)
bitStream->Write( internalPacket->messageNumber );
// REMOVEME
// if (internalPacket->messageNumber > 30000)
// {
// int a=5;
// }
// Acknowledgment packets have no more data than the messageNumber and whether it is anacknowledgment
#ifdef _DEBUG
assert( internalPacket->dataBitLength > 0 );
#endif
// Write the PacketReliability. This is encoded in 3 bits
bitStream->WriteBits( (const unsigned char *)&c, 3, true );
// If the reliability requires an ordering channel and ordering index, we Write those.
if ( internalPacket->reliability == UNRELIABLE_SEQUENCED || internalPacket->reliability == RELIABLE_SEQUENCED || internalPacket->reliability == RELIABLE_ORDERED )
{
// ordering channel encoded in 5 bits (from 0 to 31)
bitStream->WriteBits( ( unsigned char* ) & ( internalPacket->orderingChannel ), 5, true );
// One or two bytes
bitStream->Write( internalPacket->orderingIndex );
}
// if (internalPacket->reliability == RELIABLE || internalPacket->reliability == RELIABLE_ORDERED || internalPacket->reliability==RELIABLE_SEQUENCED)
//{
// // Write the time in reliable packets for flow control
// bitStream->Write((RemoteSystemTimeType) (curTime/(RakNetTimeNS)1000));
// }
// Write if this is a split packet (1 bit)
bool isSplitPacket = internalPacket->splitPacketCount > 0;
bitStream->Write( isSplitPacket );
if ( isSplitPacket )
{
bitStream->Write( internalPacket->splitPacketId );
bitStream->WriteCompressed( internalPacket->splitPacketIndex );
bitStream->WriteCompressed( internalPacket->splitPacketCount );
}
// Write how many bits the packet data is. Stored in 13 bits
#ifdef _DEBUG
assert( BITS_TO_BYTES( internalPacket->dataBitLength ) < MAXIMUM_MTU_SIZE ); // I never send more than MTU_SIZE bytes
#endif
unsigned short length = ( unsigned short ) internalPacket->dataBitLength; // Ignore the 2 high bytes for WriteBits
bitStream->WriteCompressed( length );
// Write the actual data.
bitStream->WriteAlignedBytes( ( unsigned char* ) internalPacket->data, BITS_TO_BYTES( internalPacket->dataBitLength ) );
//bitStream->WriteBits((unsigned char*)internalPacket->data, internalPacket->dataBitLength);
//printf("WRITE:\n");
//bitStream->PrintBits();
return bitStream->GetNumberOfBitsUsed() - start;
}
//-------------------------------------------------------------------------------------------------------
// Parse a bitstream and create an internal packet to represent this data
//-------------------------------------------------------------------------------------------------------
InternalPacket* ReliabilityLayer::CreateInternalPacketFromBitStream( RakNet::BitStream *bitStream, RakNetTimeNS time )
{
bool bitStreamSucceeded;
InternalPacket* internalPacket;
if ( bitStream->GetNumberOfUnreadBits() < (int) sizeof( internalPacket->messageNumber ) * 8 )
return 0; // leftover bits
internalPacket = internalPacketPool.Allocate();
//printf("READ:\n");
//bitStream->PrintBits();
if (internalPacket==0)
{
// Out of memory
RakAssert(0);
return 0;
}
#ifdef _DEBUG
// Remove accessing undefined memory error
memset( internalPacket, 255, sizeof( InternalPacket ) );
#endif
internalPacket->creationTime = time;
//bitStream->AlignReadToByteBoundary();
// Read the packet number (4 bytes)
bitStreamSucceeded = bitStream->Read( internalPacket->messageNumber );
// REMOVEME
// if (internalPacket->messageNumber > 30000)
// {
// int a=5;
// }
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets
//assert( bitStreamSucceeded );
#endif
if ( bitStreamSucceeded == false )
{
internalPacketPool.Release( internalPacket );
return 0;
}
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets
//assert( bitStreamSucceeded );
#endif
// Read the PacketReliability. This is encoded in 3 bits
unsigned char reliability;
bitStreamSucceeded = bitStream->ReadBits( ( unsigned char* ) ( &( reliability ) ), 3 );
internalPacket->reliability = ( const PacketReliability ) reliability;
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets
// assert( bitStreamSucceeded );
#endif
if ( bitStreamSucceeded == false )
{
internalPacketPool.Release( internalPacket );
return 0;
}
// If the reliability requires an ordering channel and ordering index, we read those.
if ( internalPacket->reliability == UNRELIABLE_SEQUENCED || internalPacket->reliability == RELIABLE_SEQUENCED || internalPacket->reliability == RELIABLE_ORDERED )
{
// ordering channel encoded in 5 bits (from 0 to 31)
bitStreamSucceeded = bitStream->ReadBits( ( unsigned char* ) & ( internalPacket->orderingChannel ), 5 );
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets
//assert( bitStreamSucceeded );
#endif
if ( bitStreamSucceeded == false )
{
internalPacketPool.Release( internalPacket );
return 0;
}
bitStreamSucceeded = bitStream->Read( internalPacket->orderingIndex );
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets
//assert( bitStreamSucceeded );
#endif
if ( bitStreamSucceeded == false )
{
internalPacketPool.Release( internalPacket );
return 0;
}
}
// if (internalPacket->reliability == RELIABLE || internalPacket->reliability == RELIABLE_ORDERED || internalPacket->reliability==RELIABLE_SEQUENCED)
// {
// // Read the time in reliable packets for flow control
// bitStream->Read(internalPacket->remoteSystemTime);
// }
// Read if this is a split packet (1 bit)
bool isSplitPacket;
bitStreamSucceeded = bitStream->Read( isSplitPacket );
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets
//assert( bitStreamSucceeded );
#endif
if ( bitStreamSucceeded == false )
{
internalPacketPool.Release( internalPacket );
return 0;
}
if ( isSplitPacket )
{
bitStreamSucceeded = bitStream->Read( internalPacket->splitPacketId );
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets
// assert( bitStreamSucceeded );
#endif
if ( bitStreamSucceeded == false )
{
internalPacketPool.Release( internalPacket );
return 0;
}
bitStreamSucceeded = bitStream->ReadCompressed( internalPacket->splitPacketIndex );
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets
//assert( bitStreamSucceeded );
#endif
if ( bitStreamSucceeded == false )
{
internalPacketPool.Release( internalPacket );
return 0;
}
bitStreamSucceeded = bitStream->ReadCompressed( internalPacket->splitPacketCount );
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets
//assert( bitStreamSucceeded );
#endif
if ( bitStreamSucceeded == false )
{
internalPacketPool.Release( internalPacket );
return 0;
}
}
else
internalPacket->splitPacketIndex = internalPacket->splitPacketCount = 0;
// Optimization - do byte alignment here
//unsigned char zero;
//bitStream->ReadBits(&zero, 8 - (bitStream->GetNumberOfBitsUsed() %8));
//assert(zero==0);
unsigned short length;
bitStreamSucceeded = bitStream->ReadCompressed( length );
// Read into an unsigned short. Otherwise the data would be offset too high by two bytes
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets
//assert( bitStreamSucceeded );
#endif
if ( bitStreamSucceeded == false )
{
internalPacketPool.Release( internalPacket );
return 0;
}
internalPacket->dataBitLength = length;
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets arriving when the sender does not know we just connected, which is an unavoidable condition sometimes
// assert( internalPacket->dataBitLength > 0 && BITS_TO_BYTES( internalPacket->dataBitLength ) < MAXIMUM_MTU_SIZE );
#endif
if ( ! ( internalPacket->dataBitLength > 0 && BITS_TO_BYTES( internalPacket->dataBitLength ) < MAXIMUM_MTU_SIZE ) )
{
// 10/08/05 - internalPacket->data wasn't allocated yet
// delete [] internalPacket->data;
internalPacketPool.Release( internalPacket );
return 0;
}
// Allocate memory to hold our data
internalPacket->data = (unsigned char*) rakMalloc( (size_t) BITS_TO_BYTES( internalPacket->dataBitLength ) );
//printf("Allocating %i\n", internalPacket->data);
// Set the last byte to 0 so if ReadBits does not read a multiple of 8 the last bits are 0'ed out
internalPacket->data[ BITS_TO_BYTES( internalPacket->dataBitLength ) - 1 ] = 0;
// Read the data the packet holds
bitStreamSucceeded = bitStream->ReadAlignedBytes( ( unsigned char* ) internalPacket->data, BITS_TO_BYTES( internalPacket->dataBitLength ) );
//bitStreamSucceeded = bitStream->ReadBits((unsigned char*)internalPacket->data, internalPacket->dataBitLength);
#ifdef _DEBUG
// 10/08/05 - Disabled assert since this hits from offline packets
//assert( bitStreamSucceeded );
#endif
if ( bitStreamSucceeded == false )
{
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
return 0;
}
// PRINTING UNRELIABLE STRINGS
// if (internalPacket->data && internalPacket->dataBitLength>5*8)
// printf("Received %s\n",internalPacket->data);
return internalPacket;
}
//-------------------------------------------------------------------------------------------------------
// Get the SHA1 code
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::GetSHA1( unsigned char * const buffer, unsigned int
nbytes, char code[ SHA1_LENGTH ] )
{
CSHA1 sha1;
sha1.Reset();
sha1.Update( ( unsigned char* ) buffer, nbytes );
sha1.Final();
memcpy( code, sha1.GetHash(), SHA1_LENGTH );
}
//-------------------------------------------------------------------------------------------------------
// Check the SHA1 code
//-------------------------------------------------------------------------------------------------------
bool ReliabilityLayer::CheckSHA1( char code[ SHA1_LENGTH ], unsigned char *
const buffer, unsigned int nbytes )
{
char code2[ SHA1_LENGTH ];
GetSHA1( buffer, nbytes, code2 );
for ( int i = 0; i < SHA1_LENGTH; i++ )
if ( code[ i ] != code2[ i ] )
return false;
return true;
}
//-------------------------------------------------------------------------------------------------------
// Search the specified list for sequenced packets on the specified ordering
// stream, optionally skipping those with splitPacketId, and delete them
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::DeleteSequencedPacketsInList( unsigned char orderingChannel, DataStructures::List<InternalPacket*>&theList, int splitPacketId )
{
unsigned i = 0;
while ( i < theList.Size() )
{
if ( ( theList[ i ]->reliability == RELIABLE_SEQUENCED || theList[ i ]->reliability == UNRELIABLE_SEQUENCED ) &&
theList[ i ]->orderingChannel == orderingChannel && ( splitPacketId == -1 || theList[ i ]->splitPacketId != (unsigned int) splitPacketId ) )
{
InternalPacket * internalPacket = theList[ i ];
theList.RemoveAtIndex( i );
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
}
else
i++;
}
}
//-------------------------------------------------------------------------------------------------------
// Search the specified list for sequenced packets with a value less than orderingIndex and delete them
// Note - I added functionality so you can use the Queue as a list (in this case for searching) but it is less efficient to do so than a regular list
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::DeleteSequencedPacketsInList( unsigned char orderingChannel, DataStructures::Queue<InternalPacket*>&theList )
{
InternalPacket * internalPacket;
int listSize = theList.Size();
int i = 0;
while ( i < listSize )
{
if ( ( theList[ i ]->reliability == RELIABLE_SEQUENCED || theList[ i ]->reliability == UNRELIABLE_SEQUENCED ) && theList[ i ]->orderingChannel == orderingChannel )
{
internalPacket = theList[ i ];
theList.RemoveAtIndex( i );
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
listSize--;
}
else
i++;
}
}
//-------------------------------------------------------------------------------------------------------
// Returns true if newPacketOrderingIndex is older than the waitingForPacketOrderingIndex
//-------------------------------------------------------------------------------------------------------
bool ReliabilityLayer::IsOlderOrderedPacket( OrderingIndexType newPacketOrderingIndex, OrderingIndexType waitingForPacketOrderingIndex )
{
OrderingIndexType maxRange = (OrderingIndexType) -1;
if ( waitingForPacketOrderingIndex > maxRange/2 )
{
if ( newPacketOrderingIndex >= waitingForPacketOrderingIndex - maxRange/2+1 && newPacketOrderingIndex < waitingForPacketOrderingIndex )
{
return true;
}
}
else
if ( newPacketOrderingIndex >= ( OrderingIndexType ) ( waitingForPacketOrderingIndex - (( OrderingIndexType ) maxRange/2+1) ) ||
newPacketOrderingIndex < waitingForPacketOrderingIndex )
{
return true;
}
// Old packet
return false;
}
//-------------------------------------------------------------------------------------------------------
// Split the passed packet into chunks under MTU_SIZEbytes (including headers) and save those new chunks
// Optimized version
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::SplitPacket( InternalPacket *internalPacket, int MTUSize )
{
// Doing all sizes in bytes in this function so I don't write partial bytes with split packets
internalPacket->splitPacketCount = 1; // This causes GetBitStreamHeaderLength to account for the split packet header
unsigned int headerLength = (unsigned int) BITS_TO_BYTES( GetBitStreamHeaderLength( internalPacket ) );
unsigned int dataByteLength = (unsigned int) BITS_TO_BYTES( internalPacket->dataBitLength );
int maxDataSize;
int maximumSendBlock, byteOffset, bytesToSend;
SplitPacketIndexType splitPacketIndex;
int i;
InternalPacket **internalPacketArray;
maxDataSize = MTUSize - UDP_HEADER_SIZE;
if ( encryptor.IsKeySet() )
maxDataSize -= 16; // Extra data for the encryptor
#ifdef _DEBUG
// Make sure we need to split the packet to begin with
assert( dataByteLength > maxDataSize - headerLength );
#endif
// How much to send in the largest block
maximumSendBlock = maxDataSize - headerLength;
// Calculate how many packets we need to create
internalPacket->splitPacketCount = ( ( dataByteLength - 1 ) / ( maximumSendBlock ) + 1 );
statistics.totalSplits += internalPacket->splitPacketCount;
// Optimization
// internalPacketArray = new InternalPacket*[internalPacket->splitPacketCount];
bool usedAlloca=false;
#if !defined(_XBOX360)
if (sizeof( InternalPacket* ) * internalPacket->splitPacketCount < MAX_ALLOCA_STACK_ALLOCATION)
{
internalPacketArray = ( InternalPacket** ) alloca( sizeof( InternalPacket* ) * internalPacket->splitPacketCount );
usedAlloca=true;
}
else
#endif
internalPacketArray = (InternalPacket**) rakMalloc( sizeof(InternalPacket*) * internalPacket->splitPacketCount );
for ( i = 0; i < ( int ) internalPacket->splitPacketCount; i++ )
{
internalPacketArray[ i ] = internalPacketPool.Allocate();
//internalPacketArray[ i ] = (InternalPacket*) alloca( sizeof( InternalPacket ) );
// internalPacketArray[ i ] = sendPacketSet[internalPacket->priority].WriteLock();
memcpy( internalPacketArray[ i ], internalPacket, sizeof( InternalPacket ) );
}
// This identifies which packet this is in the set
splitPacketIndex = 0;
// Do a loop to send out all the packets
do
{
byteOffset = splitPacketIndex * maximumSendBlock;
bytesToSend = dataByteLength - byteOffset;
if ( bytesToSend > maximumSendBlock )
bytesToSend = maximumSendBlock;
// Copy over our chunk of data
internalPacketArray[ splitPacketIndex ]->data = (unsigned char*) rakMalloc( bytesToSend );
memcpy( internalPacketArray[ splitPacketIndex ]->data, internalPacket->data + byteOffset, bytesToSend );
if ( bytesToSend != maximumSendBlock )
internalPacketArray[ splitPacketIndex ]->dataBitLength = internalPacket->dataBitLength - splitPacketIndex * ( maximumSendBlock << 3 );
else
internalPacketArray[ splitPacketIndex ]->dataBitLength = bytesToSend << 3;
internalPacketArray[ splitPacketIndex ]->splitPacketIndex = splitPacketIndex;
internalPacketArray[ splitPacketIndex ]->splitPacketId = splitPacketId;
internalPacketArray[ splitPacketIndex ]->splitPacketCount = internalPacket->splitPacketCount;
if ( splitPacketIndex > 0 ) // For the first split packet index we keep the messageNumber already assigned
{
// For every further packet we use a new messageNumber.
// Note that all split packets are reliable
// internalPacketArray[ splitPacketIndex ]->messageNumber = sendMessageNumberIndex;
internalPacketArray[ splitPacketIndex ]->messageNumber = (MessageNumberType) -1;
internalPacketArray[ splitPacketIndex ]->messageNumberAssigned=false;
//if ( ++messageNumber == RECEIVED_PACKET_LOG_LENGTH )
// messageNumber = 0;
// ++sendMessageNumberIndex;
}
// Add the new packet to send list at the correct priority
// sendQueue[internalPacket->priority].Insert(newInternalPacket);
// SHOW SPLIT PACKET GENERATION
// if (splitPacketIndex % 100 == 0)
// printf("splitPacketIndex=%i\n",splitPacketIndex);
//} while(++splitPacketIndex < internalPacket->splitPacketCount);
}
while ( ++splitPacketIndex < internalPacket->splitPacketCount );
splitPacketId++; // It's ok if this wraps to 0
// InternalPacket *workingPacket;
// Copy all the new packets into the split packet list
for ( i = 0; i < ( int ) internalPacket->splitPacketCount; i++ )
{
sendPacketSet[ internalPacket->priority ].Push( internalPacketArray[ i ] );
// workingPacket=sendPacketSet[internalPacket->priority].WriteLock();
// memcpy(workingPacket, internalPacketArray[ i ], sizeof(InternalPacket));
// sendPacketSet[internalPacket->priority].WriteUnlock();
}
// Delete the original
rakFree(internalPacket->data);
internalPacketPool.Release( internalPacket );
if (usedAlloca==false)
rakFree(internalPacketArray);
}
//-------------------------------------------------------------------------------------------------------
// Insert a packet into the split packet list
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::InsertIntoSplitPacketList( InternalPacket * internalPacket, RakNetTimeNS time )
{
bool objectExists;
unsigned index;
index=splitPacketChannelList.GetIndexFromKey(internalPacket->splitPacketId, &objectExists);
if (objectExists==false)
{
SplitPacketChannel *newChannel = new SplitPacketChannel;
index=splitPacketChannelList.Insert(internalPacket->splitPacketId, newChannel, true);
}
splitPacketChannelList[index]->splitPacketList.Insert(internalPacket->splitPacketIndex, internalPacket, true);
splitPacketChannelList[index]->lastUpdateTime=time;
if (splitMessageProgressInterval &&
splitPacketChannelList[index]->splitPacketList[0]->splitPacketIndex==0 &&
splitPacketChannelList[index]->splitPacketList.Size()!=splitPacketChannelList[index]->splitPacketList[0]->splitPacketCount &&
(splitPacketChannelList[index]->splitPacketList.Size()%splitMessageProgressInterval)==0)
{
// printf("msgID=%i Progress %i/%i Partsize=%i\n",
// splitPacketChannelList[index]->splitPacketList[0]->data[0],
// splitPacketChannelList[index]->splitPacketList.Size(),
// internalPacket->splitPacketCount,
// BITS_TO_BYTES(splitPacketChannelList[index]->splitPacketList[0]->dataBitLength));
// Return ID_DOWNLOAD_PROGRESS
// Write splitPacketIndex (SplitPacketIndexType)
// Write splitPacketCount (SplitPacketIndexType)
// Write byteLength (4)
// Write data, splitPacketChannelList[index]->splitPacketList[0]->data
InternalPacket *progressIndicator = internalPacketPool.Allocate();
unsigned int length = sizeof(MessageID) + sizeof(unsigned int)*2 + sizeof(unsigned int) + (unsigned int) BITS_TO_BYTES(splitPacketChannelList[index]->splitPacketList[0]->dataBitLength);
progressIndicator->data = (unsigned char*) rakMalloc( length );
progressIndicator->dataBitLength=BYTES_TO_BITS(length);
progressIndicator->data[0]=(MessageID)ID_DOWNLOAD_PROGRESS;
unsigned int temp;
temp=splitPacketChannelList[index]->splitPacketList.Size();
memcpy(progressIndicator->data+sizeof(MessageID), &temp, sizeof(unsigned int));
temp=(unsigned int)internalPacket->splitPacketCount;
memcpy(progressIndicator->data+sizeof(MessageID)+sizeof(unsigned int)*1, &temp, sizeof(unsigned int));
temp=(unsigned int) BITS_TO_BYTES(splitPacketChannelList[index]->splitPacketList[0]->dataBitLength);
memcpy(progressIndicator->data+sizeof(MessageID)+sizeof(unsigned int)*2, &temp, sizeof(unsigned int));
memcpy(progressIndicator->data+sizeof(MessageID)+sizeof(unsigned int)*3, splitPacketChannelList[index]->splitPacketList[0]->data, (size_t) BITS_TO_BYTES(splitPacketChannelList[index]->splitPacketList[0]->dataBitLength));
outputQueue.Push(progressIndicator);
}
}
//-------------------------------------------------------------------------------------------------------
// Take all split chunks with the specified splitPacketId and try to
//reconstruct a packet. If we can, allocate and return it. Otherwise return 0
// Optimized version
//-------------------------------------------------------------------------------------------------------
InternalPacket * ReliabilityLayer::BuildPacketFromSplitPacketList( SplitPacketIdType splitPacketId, RakNetTimeNS time )
{
unsigned i, j;
unsigned byteProgress;
InternalPacket * internalPacket;
bool objectExists;
i=splitPacketChannelList.GetIndexFromKey(splitPacketId, &objectExists);
#ifdef _DEBUG
assert(objectExists);
#endif
if (splitPacketChannelList[i]->splitPacketList.Size()==splitPacketChannelList[i]->splitPacketList[0]->splitPacketCount)
{
// Reconstruct
internalPacket = CreateInternalPacketCopy( splitPacketChannelList[i]->splitPacketList[0], 0, 0, time );
internalPacket->dataBitLength=0;
for (j=0; j < splitPacketChannelList[i]->splitPacketList.Size(); j++)
internalPacket->dataBitLength+=splitPacketChannelList[i]->splitPacketList[j]->dataBitLength;
internalPacket->data = (unsigned char*) rakMalloc( (size_t) BITS_TO_BYTES( internalPacket->dataBitLength ) );
byteProgress=0;
for (j=0; j < splitPacketChannelList[i]->splitPacketList.Size(); j++)
{
memcpy(internalPacket->data+byteProgress, splitPacketChannelList[i]->splitPacketList[j]->data, (size_t) BITS_TO_BYTES(splitPacketChannelList[i]->splitPacketList[j]->dataBitLength));
byteProgress+=(unsigned int) BITS_TO_BYTES(splitPacketChannelList[i]->splitPacketList[j]->dataBitLength);
}
for (j=0; j < splitPacketChannelList[i]->splitPacketList.Size(); j++)
{
rakFree(splitPacketChannelList[i]->splitPacketList[j]->data);
internalPacketPool.Release(splitPacketChannelList[i]->splitPacketList[j]);
}
delete splitPacketChannelList[i];
splitPacketChannelList.RemoveAtIndex(i);
return internalPacket;
}
return 0;
}
// Delete any unreliable split packets that have long since expired
void ReliabilityLayer::DeleteOldUnreliableSplitPackets( RakNetTimeNS time )
{
unsigned i,j;
i=0;
while (i < splitPacketChannelList.Size())
{
if (time > splitPacketChannelList[i]->lastUpdateTime + (RakNetTimeNS)timeoutTime*(RakNetTimeNS)1000 &&
(splitPacketChannelList[i]->splitPacketList[0]->reliability==UNRELIABLE || splitPacketChannelList[i]->splitPacketList[0]->reliability==UNRELIABLE_SEQUENCED))
{
for (j=0; j < splitPacketChannelList[i]->splitPacketList.Size(); j++)
{
delete [] splitPacketChannelList[i]->splitPacketList[j]->data;
internalPacketPool.Release(splitPacketChannelList[i]->splitPacketList[j]);
}
delete splitPacketChannelList[i];
splitPacketChannelList.RemoveAtIndex(i);
#if defined(DEBUG_SPLIT_PACKET_PROBLEMS)
printf("DeleteOldUnreliableSplitPackets called, split packet will never complete\n");
#endif
}
else
i++;
}
}
//-------------------------------------------------------------------------------------------------------
// Creates a copy of the specified internal packet with data copied from the original starting at dataByteOffset for dataByteLength bytes.
// Does not copy any split data parameters as that information is always generated does not have any reason to be copied
//-------------------------------------------------------------------------------------------------------
InternalPacket * ReliabilityLayer::CreateInternalPacketCopy( InternalPacket *original, int dataByteOffset, int dataByteLength, RakNetTimeNS time )
{
InternalPacket * copy = internalPacketPool.Allocate();
#ifdef _DEBUG
// Remove accessing undefined memory error
memset( copy, 255, sizeof( InternalPacket ) );
#endif
// Copy over our chunk of data
if ( dataByteLength > 0 )
{
copy->data = (unsigned char*) rakMalloc( BITS_TO_BYTES(dataByteLength ) );
memcpy( copy->data, original->data + dataByteOffset, dataByteLength );
}
else
copy->data = 0;
copy->dataBitLength = dataByteLength << 3;
copy->creationTime = time;
copy->nextActionTime = 0;
copy->orderingIndex = original->orderingIndex;
copy->orderingChannel = original->orderingChannel;
copy->messageNumber = original->messageNumber;
copy->priority = original->priority;
copy->reliability = original->reliability;
// REMOVEME
// if (copy->messageNumber > 30000)
// {
// int a=5;
// }
return copy;
}
//-------------------------------------------------------------------------------------------------------
// Get the specified ordering list
//-------------------------------------------------------------------------------------------------------
DataStructures::LinkedList<InternalPacket*> *ReliabilityLayer::GetOrderingListAtOrderingStream( unsigned char orderingChannel )
{
if ( orderingChannel >= orderingList.Size() )
return 0;
return orderingList[ orderingChannel ];
}
//-------------------------------------------------------------------------------------------------------
// Add the internal packet to the ordering list in order based on order index
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::AddToOrderingList( InternalPacket * internalPacket )
{
#ifdef _DEBUG
assert( internalPacket->orderingChannel < NUMBER_OF_ORDERED_STREAMS );
#endif
if ( internalPacket->orderingChannel >= NUMBER_OF_ORDERED_STREAMS )
{
return;
}
DataStructures::LinkedList<InternalPacket*> *theList;
if ( internalPacket->orderingChannel >= orderingList.Size() || orderingList[ internalPacket->orderingChannel ] == 0 )
{
// Need a linked list in this index
orderingList.Replace( new DataStructures::LinkedList<InternalPacket*>, 0, internalPacket->orderingChannel );
theList=orderingList[ internalPacket->orderingChannel ];
}
else
{
// Have a linked list in this index
if ( orderingList[ internalPacket->orderingChannel ]->Size() == 0 )
{
theList=orderingList[ internalPacket->orderingChannel ];
}
else
{
theList = GetOrderingListAtOrderingStream( internalPacket->orderingChannel );
}
}
theList->End();
theList->Add(internalPacket);
}
//-------------------------------------------------------------------------------------------------------
// Inserts a packet into the resend list in order
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::InsertPacketIntoResendList( InternalPacket *internalPacket, RakNetTimeNS time, bool makeCopyOfInternalPacket, bool firstResend )
{
// lastAckTime is the time we last got an acknowledgment - however we also initialize the value if this is the first resend and
// either we never got an ack before or we are inserting into an empty resend queue
if ( firstResend && (lastAckTime == 0 || resendList.IsEmpty()))
{
lastAckTime = time; // Start the timer for the ack of this packet if we aren't already waiting for an ack
}
if (makeCopyOfInternalPacket)
{
InternalPacket *pool=internalPacketPool.Allocate();
//printf("Adding %i\n", internalPacket->data);
memcpy(pool, internalPacket, sizeof(InternalPacket));
resendQueue.Push( pool );
}
else
{
resendQueue.Push( internalPacket );
}
RakAssert(internalPacket->nextActionTime!=0);
}
//-------------------------------------------------------------------------------------------------------
// If Read returns -1 and this returns true then a modified packet was detected
//-------------------------------------------------------------------------------------------------------
bool ReliabilityLayer::IsCheater( void ) const
{
return cheater;
}
//-------------------------------------------------------------------------------------------------------
// Were you ever unable to deliver a packet despite retries?
//-------------------------------------------------------------------------------------------------------
bool ReliabilityLayer::IsDeadConnection( void ) const
{
return deadConnection;
}
//-------------------------------------------------------------------------------------------------------
// Causes IsDeadConnection to return true
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::KillConnection( void )
{
deadConnection=true;
}
//-------------------------------------------------------------------------------------------------------
// Statistics
//-------------------------------------------------------------------------------------------------------
RakNetStatistics * const ReliabilityLayer::GetStatistics( void )
{
unsigned i;
for ( i = 0; i < NUMBER_OF_PRIORITIES; i++ )
{
statistics.messageSendBuffer[i] = sendPacketSet[i].Size();
}
statistics.acknowlegementsPending = acknowlegements.Size();
if (lastUpdateTime>histogramStart && histogramBitsSent >0)
statistics.bitsPerSecond=(double)((long double)histogramBitsSent / ((long double) (lastUpdateTime-histogramStart) / 1000000.0f));
else
statistics.bitsPerSecond=0.0;
statistics.messagesWaitingForReassembly = 0;
for (i=0; i < splitPacketChannelList.Size(); i++)
statistics.messagesWaitingForReassembly+=splitPacketChannelList[i]->splitPacketList.Size();
statistics.internalOutputQueueSize = outputQueue.Size();
//statistics.lossySize = lossyWindowSize == MAXIMUM_WINDOW_SIZE + 1 ? 0 : lossyWindowSize;
// statistics.lossySize=0;
// The connection is full if we are continuously sending data and we had to throttle back recently.
statistics.bandwidthExceeded = continuousSend && (lastUpdateTime-lastTimeBetweenPacketsIncrease) > (RakNetTimeNS) 1000000;
statistics.messagesOnResendQueue = GetResendListDataSize();
return &statistics;
}
//-------------------------------------------------------------------------------------------------------
// Returns the number of packets in the resend queue, not counting holes
//-------------------------------------------------------------------------------------------------------
unsigned int ReliabilityLayer::GetResendListDataSize(void) const
{
/*
unsigned int i, count;
for (count=0, i=0; i < resendList.Size(); i++)
if (resendList[i]!=0)
count++;
return count;
*/
// Not accurate but thread-safe. The commented version might crash if the queue is cleared while we loop through it
return resendList.Size();
}
//-------------------------------------------------------------------------------------------------------
// Process threaded commands
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::UpdateThreadedMemory(void)
{
if ( freeThreadedMemoryOnNextUpdate )
{
freeThreadedMemoryOnNextUpdate = false;
FreeThreadedMemory();
}
}
//-------------------------------------------------------------------------------------------------------
bool ReliabilityLayer::AckTimeout(RakNetTimeNS curTime)
{
return curTime > lastAckTime && lastAckTime && curTime - lastAckTime > (RakNetTimeNS)timeoutTime*1000;
}
//-------------------------------------------------------------------------------------------------------
RakNetTimeNS ReliabilityLayer::GetNextSendTime(void) const
{
return nextSendTime;
}
//-------------------------------------------------------------------------------------------------------
RakNetTimeNS ReliabilityLayer::GetTimeBetweenPackets(void) const
{
return timeBetweenPackets;
}
//-------------------------------------------------------------------------------------------------------
RakNetTimeNS ReliabilityLayer::GetLastTimeBetweenPacketsDecrease(void) const
{
return lastTimeBetweenPacketsDecrease;
}
//-------------------------------------------------------------------------------------------------------
RakNetTimeNS ReliabilityLayer::GetLastTimeBetweenPacketsIncrease(void) const
{
return lastTimeBetweenPacketsIncrease;
}
//-------------------------------------------------------------------------------------------------------
RakNetTimeNS ReliabilityLayer::GetAckPing(void) const
{
return ackPing;
}
//-------------------------------------------------------------------------------------------------------
/*
int InternalPacketCompByInternalOrderIndex( InternalPacket * const &key, InternalPacket * const &data )
{
int64_t holeCount = (key->messageInternalOrder-data->messageInternalOrder);
int64_t absHoleCount = holeCount>0 ? holeCount : -holeCount;
MessageNumberType typeRange = (MessageNumberType)-1;
if (absHoleCount > typeRange/2)
{
if (holeCount>0)
return -1;
else if (holeCount<0)
return 1;
}
else
{
if (holeCount>0)
return 1;
else if (holeCount<0)
return -1;
}
if (key->splitPacketIndex>data->splitPacketIndex)
return 1;
if (key->splitPacketIndex<data->splitPacketIndex)
return -1;
return 0;
}
void ReliabilityLayer::GetUndeliveredMessages(RakNet::BitStream *messages, int MTUSize)
{
DataStructures::OrderedList<InternalPacket*, InternalPacket*, InternalPacketCompByInternalOrderIndex> undeliveredMessages;
unsigned int i,j,k;
for (i=0; i < resendQueue.Size(); i++)
{
if (resendQueue[i]->nextActionTime==0)
continue;
undeliveredMessages.Insert(resendQueue[i],resendQueue[i],true);
}
for ( i = 0; i < NUMBER_OF_PRIORITIES; i++ )
{
for (j=0; j < sendPacketSet[ i ].Size(); j++)
undeliveredMessages.Insert( sendPacketSet[ i ][ j ],sendPacketSet[ i ][ j ],true);
}
unsigned char zeroBlock[MAXIMUM_MTU_SIZE];
memset(zeroBlock,0,MAXIMUM_MTU_SIZE);
unsigned int messagesConcatenated=0;
uint64_t totalBitLength;
BitSize_t oldWriteOffset;
unsigned int lastSplitPacketIndex, lastSplitPacketId;
messages->Reset();
messages->Write((unsigned int) undeliveredMessages.Size());
i=0;
while (i < undeliveredMessages.Size())
{
// Write message size
if (undeliveredMessages[i]->splitPacketCount>0)
{
lastSplitPacketId=undeliveredMessages[i]->splitPacketId;
lastSplitPacketIndex=0;
j=i;
totalBitLength=0;
unsigned int headerLength = (unsigned int) BITS_TO_BYTES( GetBitStreamHeaderLength( undeliveredMessages[i] ) );
unsigned int maxDataSize = MTUSize - UDP_HEADER_SIZE;
// How much to send in the largest block
unsigned int maximumSendBlock = maxDataSize - headerLength;
// Calculate the total bit length of all the messages, using the split MTU if not known
while (j < undeliveredMessages.Size() && lastSplitPacketId==undeliveredMessages[j]->splitPacketId && undeliveredMessages[j]->splitPacketCount>0)
{
for (k=lastSplitPacketIndex; k < undeliveredMessages[j]->splitPacketIndex; k++)
totalBitLength+=BYTES_TO_BITS(maximumSendBlock);
totalBitLength+=undeliveredMessages[j]->dataBitLength;
lastSplitPacketIndex=undeliveredMessages[j]->splitPacketIndex+1;
j++;
}
messages->Write((unsigned int) BITS_TO_BYTES(totalBitLength));
while (i < undeliveredMessages.Size() && lastSplitPacketId==undeliveredMessages[i]->splitPacketId && undeliveredMessages[i]->splitPacketCount>0)
{
// Write blocks of 0 for unknown data
for (j=lastSplitPacketIndex; j < undeliveredMessages[i]->splitPacketIndex; j++)
messages->WriteAlignedBytes(zeroBlock,BITS_TO_BYTES(undeliveredMessages[i]->dataBitLength));
// Write the data
messages->WriteAlignedBytes(undeliveredMessages[i]->data, BITS_TO_BYTES(undeliveredMessages[i]->dataBitLength));
lastSplitPacketIndex=undeliveredMessages[i]->splitPacketIndex+1;
messagesConcatenated++;
i++;
}
}
else
{
messages->Write((unsigned int) BITS_TO_BYTES(undeliveredMessages[i]->dataBitLength));
// Write the data
messages->WriteAlignedBytes(undeliveredMessages[i]->data, BITS_TO_BYTES(undeliveredMessages[i]->dataBitLength));
i++;
}
}
oldWriteOffset=messages->GetWriteOffset();
messages->SetWriteOffset(0);
messages->Write((unsigned int) undeliveredMessages.Size()-messagesConcatenated);
messages->SetWriteOffset(oldWriteOffset);
}
*/
//-------------------------------------------------------------------------------------------------------
/*
void ReliabilityLayer::SetDoFastThroughputReactions(bool fast)
{
if (fast)
timeBetweenPacketsIncreaseMultiplier=TIME_BETWEEN_PACKETS_INCREASE_MULTIPLIER_FAST;
else
timeBetweenPacketsIncreaseMultiplier=TIME_BETWEEN_PACKETS_INCREASE_MULTIPLIER_DEFAULT;
}
*/
//-------------------------------------------------------------------------------------------------------
#ifdef _MSC_VER
#pragma warning( pop )
#endif
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