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ReliabilityLayer.cpp
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ReliabilityLayer.cpp
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/*
* Original work: Copyright (c) 2014, Oculus VR, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* RakNet License.txt file in the licenses directory of this source tree. An additional grant
* of patent rights can be found in the RakNet Patents.txt file in the same directory.
*
*
* Modified work: Copyright (c) 2016-2018, SLikeSoft UG (haftungsbeschränkt)
*
* This source code was modified by SLikeSoft. Modifications are licensed under the MIT-style
* license found in the license.txt file in the root directory of this source tree.
*/
/// \file
///
#include "slikenet/ReliabilityLayer.h"
#include "slikenet/GetTime.h"
#include "slikenet/SocketLayer.h"
#include "slikenet/PluginInterface2.h"
#include "slikenet/assert.h"
#include "slikenet/Rand.h"
#include "slikenet/MessageIdentifiers.h"
#ifdef USE_THREADED_SEND
#include "slikenet/SendToThread.h"
#endif
#include <math.h>
#include "slikenet/linux_adapter.h"
#include "slikenet/osx_adapter.h"
using namespace SLNet;
// Can't figure out which library has this function on the PS3
double Ceil(double d) {if (((double)((int)d))==d) return d; return (int) (d+1.0);}
// #if defined(new)
// #pragma push_macro("new")
// #undef new
// #define RELIABILITY_LAYER_NEW_UNDEF_ALLOCATING_QUEUE
// #endif
//#define _DEBUG_LOGGER
#if CC_TIME_TYPE_BYTES==4
static const CCTimeType MAX_TIME_BETWEEN_PACKETS= 350; // 350 milliseconds
static const CCTimeType HISTOGRAM_RESTART_CYCLE=10000; // Every 10 seconds reset the histogram
#else
static const CCTimeType MAX_TIME_BETWEEN_PACKETS= 350000; // 350 milliseconds
//static const CCTimeType HISTOGRAM_RESTART_CYCLE=10000000; // Every 10 seconds reset the histogram
#endif
static const int DEFAULT_HAS_RECEIVED_PACKET_QUEUE_SIZE=512;
static const CCTimeType STARTING_TIME_BETWEEN_PACKETS=MAX_TIME_BETWEEN_PACKETS;
//static const long double TIME_BETWEEN_PACKETS_INCREASE_MULTIPLIER_DEFAULT=.02;
//static const long double TIME_BETWEEN_PACKETS_DECREASE_MULTIPLIER_DEFAULT=1.0 / 9.0;
typedef uint32_t BitstreamLengthEncoding;
//#define PRINT_TO_FILE_RELIABLE_ORDERED_TEST
#ifdef PRINT_TO_FILE_RELIABLE_ORDERED_TEST
static unsigned int packetNumber=0;
static FILE *fp=0;
#endif
//#define FLIP_SEND_ORDER_TEST
//#define LOG_TRIVIAL_NOTIFICATIONS
BPSTracker::TimeAndValue2::TimeAndValue2() {}
BPSTracker::TimeAndValue2::~TimeAndValue2() {}
BPSTracker::TimeAndValue2::TimeAndValue2(SLNet::TimeUS t, uint64_t v1) : value1(v1), time(t) {}
//BPSTracker::TimeAndValue2::TimeAndValue2(SLNet::TimeUS t, uint64_t v1, uint64_t v2) : time(t), value1(v1), value2(v2) {}
BPSTracker::BPSTracker() {Reset(_FILE_AND_LINE_);}
BPSTracker::~BPSTracker() {}
//void BPSTracker::Reset(const char *file, unsigned int line) {total1=total2=lastSec1=lastSec2=0; dataQueue.Clear(file,line);}
void BPSTracker::Reset(const char *file, unsigned int line) {total1=lastSec1=0; dataQueue.Clear(file,line);}
//void BPSTracker::Push2(RakNetTimeUS time, uint64_t value1, uint64_t value2) {dataQueue.Push(TimeAndValue2(time,value1,value2),_FILE_AND_LINE_); total1+=value1; lastSec1+=value1; total2+=value2; lastSec2+=value2;}
//uint64_t BPSTracker::GetBPS2(RakNetTimeUS time) {ClearExpired2(time); return lastSec2;}
//void BPSTracker::GetBPS1And2(RakNetTimeUS time, uint64_t &out1, uint64_t &out2) {ClearExpired2(time); out1=lastSec1; out2=lastSec2;}
uint64_t BPSTracker::GetTotal1(void) const {return total1;}
//uint64_t BPSTracker::GetTotal2(void) const {return total2;}
// void BPSTracker::ClearExpired2(SLNet::TimeUS time) {
// SLNet::TimeUS threshold=time;
// if (threshold < 1000000)
// return;
// threshold-=1000000;
// while (dataQueue.IsEmpty()==false && dataQueue.Peek().time < threshold)
// {
// lastSec1-=dataQueue.Peek().value1;
// lastSec2-=dataQueue.Peek().value2;
// dataQueue.Pop();
// }
// }
void BPSTracker::ClearExpired1(SLNet::TimeUS time)
{
while (dataQueue.IsEmpty()==false &&
#if CC_TIME_TYPE_BYTES==8
dataQueue.Peek().time+1000000 < time
#else
dataQueue.Peek().time+1000 < time
#endif
)
{
lastSec1-=dataQueue.Peek().value1;
dataQueue.Pop();
}
}
struct DatagramHeaderFormat
{
#if INCLUDE_TIMESTAMP_WITH_DATAGRAMS==1
CCTimeType sourceSystemTime;
#endif
DatagramSequenceNumberType datagramNumber;
// Use floats to save bandwidth
// float B; // Link capacity
float AS; // Data arrival rate
bool isACK;
bool isNAK;
bool isPacketPair;
bool hasBAndAS;
bool isContinuousSend;
bool needsBAndAs;
bool isValid; // To differentiate between what I serialized, and offline data
static BitSize_t GetDataHeaderBitLength()
{
return BYTES_TO_BITS(GetDataHeaderByteLength());
}
static unsigned int GetDataHeaderByteLength()
{
//return 2 + 3 + sizeof(SLNet::TimeMS) + sizeof(float)*2;
return 2 + 3 +
#if INCLUDE_TIMESTAMP_WITH_DATAGRAMS==1
sizeof(RakNetTimeMS) +
#endif
sizeof(float)*1;
}
void Serialize(SLNet::BitStream *b)
{
// Not endian safe
// RakAssert(GetDataHeaderByteLength()==sizeof(DatagramHeaderFormat));
// b->WriteAlignedBytes((const unsigned char*) this, sizeof(DatagramHeaderFormat));
// return;
b->Write(true); // IsValid
if (isACK) {
b->Write(true); // IsACK
b->Write(hasBAndAS);
b->AlignWriteToByteBoundary();
#if INCLUDE_TIMESTAMP_WITH_DATAGRAMS == 1
SLNet::TimeMS timeMSLow = (SLNet::TimeMS)sourceSystemTime&0xFFFFFFFF;
b->Write(timeMSLow);
#endif
if (hasBAndAS) {
// b->Write(B);
b->Write(AS);
}
}
else if (isNAK) {
b->Write(false); // isACK
b->Write(true); // isNAK
}
else {
b->Write(false); // isACK
b->Write(false); // isNAK
b->Write(isPacketPair);
b->Write(isContinuousSend);
b->Write(needsBAndAs);
b->AlignWriteToByteBoundary();
#if INCLUDE_TIMESTAMP_WITH_DATAGRAMS == 1
SLNet::TimeMS timeMSLow = (SLNet::TimeMS)sourceSystemTime&0xFFFFFFFF;
b->Write(timeMSLow);
#endif
b->Write(datagramNumber);
}
}
void Deserialize(SLNet::BitStream *b)
{
// Not endian safe
// b->ReadAlignedBytes((unsigned char*) this, sizeof(DatagramHeaderFormat));
// return;
b->Read(isValid);
b->Read(isACK);
if (isACK) {
isNAK = false;
isPacketPair = false;
b->Read(hasBAndAS);
b->AlignReadToByteBoundary();
#if INCLUDE_TIMESTAMP_WITH_DATAGRAMS == 1
SLNet::TimeMS timeMS;
b->Read(timeMS);
sourceSystemTime = (CCTimeType)timeMS;
#endif
if (hasBAndAS) {
// b->Read(B);
b->Read(AS);
}
}
else {
b->Read(isNAK);
if (isNAK) {
isPacketPair = false;
}
else {
b->Read(isPacketPair);
b->Read(isContinuousSend);
b->Read(needsBAndAs);
b->AlignReadToByteBoundary();
#if INCLUDE_TIMESTAMP_WITH_DATAGRAMS == 1
SLNet::TimeMS timeMS; b->Read(timeMS); sourceSystemTime=(CCTimeType) timeMS;
#endif
b->Read(datagramNumber);
}
}
}
};
#ifdef _WIN32
//#define _DEBUG_LOGGER
#ifdef _DEBUG_LOGGER
#include "slikenet/WindowsIncludes.h"
#endif
#endif
//#define DEBUG_SPLIT_PACKET_PROBLEMS
#if defined (DEBUG_SPLIT_PACKET_PROBLEMS)
static int waitFlag = -1;
#endif
using namespace SLNet;
SplitPacketSort::SplitPacketSort() :
m_data(nullptr),
m_allocationSize(0),
m_addedPacketsCount(0)
{
}
SplitPacketSort::~SplitPacketSort()
{
if (m_allocationSize) {
OP_DELETE_ARRAY(m_data, _FILE_AND_LINE_);
}
}
void SplitPacketSort::Preallocate(InternalPacket *internalPacket, const char *file, unsigned int line)
{
RakAssert(m_data == nullptr);
m_allocationSize = internalPacket->splitPacketCount;
m_data = OP_NEW_ARRAY<InternalPacket*>((int)m_allocationSize, file, line);
m_packetId = internalPacket->splitPacketId;
for (size_t i = 0; i < m_allocationSize; ++i) {
m_data[i] = nullptr;
}
}
bool SplitPacketSort::AllPacketsAdded() const
{
return GetAllocSize() == GetNumAddedPackets();
}
size_t SplitPacketSort::GetAllocSize() const
{
return m_allocationSize;
}
unsigned int SplitPacketSort::GetNumAddedPackets() const
{
return m_addedPacketsCount;
}
SplitPacketIdType SplitPacketSort::GetPacketId() const
{
RakAssert(m_data != nullptr);
return m_packetId;
}
InternalPacket*& SplitPacketSort::operator[](size_t index)
{
RakAssert(m_data != nullptr);
RakAssert(index < m_allocationSize);
return m_data[index];
}
bool SplitPacketSort::Add(InternalPacket *internalPacket)
{
RakAssert(m_data != nullptr);
RakAssert(internalPacket->splitPacketIndex < m_allocationSize);
RakAssert(m_packetId == internalPacket->splitPacketId);
RakAssert(m_data[internalPacket->splitPacketIndex] == nullptr);
if (m_data[internalPacket->splitPacketIndex] == nullptr) {
m_data[internalPacket->splitPacketIndex] = internalPacket;
++m_addedPacketsCount;
return true;
}
return false;
}
int SLNet::SplitPacketChannelComp( SplitPacketIdType const &key, SplitPacketChannel* const &data )
{
#if PREALLOCATE_LARGE_MESSAGES==1
if (key < data->returnedPacket->splitPacketId)
return -1;
if (key == data->returnedPacket->splitPacketId)
return 0;
#else
if (key < data->splitPacketList.GetPacketId())
return -1;
if (key == data->splitPacketList.GetPacketId())
return 0;
#endif
return 1;
}
// DEFINE_MULTILIST_PTR_TO_MEMBER_COMPARISONS( InternalPacket, SplitPacketIndexType, splitPacketIndex )
/*
bool operator<( const DataStructures::MLKeyRef<SplitPacketIndexType> &inputKey, const InternalPacket *cls )
{
return inputKey.Get() < cls->splitPacketIndex;
}
bool operator>( const DataStructures::MLKeyRef<SplitPacketIndexType> &inputKey, const InternalPacket *cls )
{
return inputKey.Get() > cls->splitPacketIndex;
}
bool operator==( const DataStructures::MLKeyRef<SplitPacketIndexType> &inputKey, const InternalPacket *cls )
{
return inputKey.Get() == cls->splitPacketIndex;
}
/// Semi-hack: This is necessary to call Sort()
bool operator<( const DataStructures::MLKeyRef<InternalPacket *> &inputKey, const InternalPacket *cls )
{
return inputKey.Get()->splitPacketIndex < cls->splitPacketIndex;
}
bool operator>( const DataStructures::MLKeyRef<InternalPacket *> &inputKey, const InternalPacket *cls )
{
return inputKey.Get()->splitPacketIndex > cls->splitPacketIndex;
}
bool operator==( const DataStructures::MLKeyRef<InternalPacket *> &inputKey, const InternalPacket *cls )
{
return inputKey.Get()->splitPacketIndex == cls->splitPacketIndex;
}
*/
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()
{
#ifdef _DEBUG
// Wait longer to disconnect in debug so I don't get disconnected while tracing
timeoutTime = 30000;
#else
timeoutTime = 10000;
#endif
#ifdef _DEBUG
minExtraPing = extraPingVariance = 0;
packetloss = (double)minExtraPing;
#endif
#ifdef PRINT_TO_FILE_RELIABLE_ORDERED_TEST
if (fp==0 && 0)
{
fopen_s(&fp, "reliableorderedoutput.txt", "wt");
}
#endif
InitializeVariables();
//int i = sizeof(InternalPacket);
datagramHistoryMessagePool.SetPageSize(sizeof(MessageNumberNode)*128);
internalPacketPool.SetPageSize(sizeof(InternalPacket)*INTERNAL_PACKET_PAGE_SIZE);
refCountedDataPool.SetPageSize(sizeof(InternalPacketRefCountedData)*32);
}
//-------------------------------------------------------------------------------------------------------
// Destructor
//-------------------------------------------------------------------------------------------------------
ReliabilityLayer::~ReliabilityLayer()
{
FreeMemory( true ); // Free all memory immediately
}
//-------------------------------------------------------------------------------------------------------
// Resets the layer for reuse
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::Reset(bool resetVariables, int mtuSize, bool _useSecurity)
{
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();
#if LIBCAT_SECURITY == 1
useSecurity = _useSecurity;
if (_useSecurity) {
mtuSize -= cat::AuthenticatedEncryption::OVERHEAD_BYTES;
}
#else
(void) _useSecurity;
#endif // LIBCAT_SECURITY
congestionManager.Init(SLNet::GetTimeUS(), mtuSize - UDP_HEADER_SIZE);
}
}
//-------------------------------------------------------------------------------------------------------
// Set the time, in MS, to use before considering ourselves disconnected after not being able to deliver a reliable packet
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::SetTimeoutTime(SLNet::TimeMS time)
{
timeoutTime = time;
}
//-------------------------------------------------------------------------------------------------------
// Returns the value passed to SetTimeoutTime. or the default if it was never called
//-------------------------------------------------------------------------------------------------------
SLNet::TimeMS ReliabilityLayer::GetTimeoutTime()
{
return timeoutTime;
}
//-------------------------------------------------------------------------------------------------------
// Initialize the variables
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::InitializeVariables()
{
memset( orderedWriteIndex, 0, NUMBER_OF_ORDERED_STREAMS * sizeof(OrderingIndexType));
memset( sequencedWriteIndex, 0, NUMBER_OF_ORDERED_STREAMS * sizeof(OrderingIndexType) );
memset( orderedReadIndex, 0, NUMBER_OF_ORDERED_STREAMS * sizeof(OrderingIndexType) );
memset( highestSequencedReadIndex, 0, NUMBER_OF_ORDERED_STREAMS * sizeof(OrderingIndexType) );
memset( &statistics, 0, sizeof( statistics ) );
memset( &heapIndexOffsets, 0, sizeof( heapIndexOffsets ) );
statistics.connectionStartTime = SLNet::GetTimeUS();
splitPacketId = 0;
elapsedTimeSinceLastUpdate=0;
throughputCapCountdown=0;
sendReliableMessageNumberIndex = 0;
internalOrderIndex=0;
timeToNextUnreliableCull=0;
unreliableLinkedListHead=0;
lastUpdateTime= SLNet::GetTimeUS();
bandwidthExceededStatistic=false;
remoteSystemTime=0;
unreliableTimeout=0;
lastBpsClear=0;
// Disable packet pairs
countdownToNextPacketPair=15;
nextAllowedThroughputSample=0;
deadConnection = cheater = false;
timeOfLastContinualSend=0;
// timeResendQueueNonEmpty = 0;
timeLastDatagramArrived= SLNet::GetTimeMS();
// packetlossThisSample=false;
// backoffThisSample=0;
// packetlossThisSampleResendCount=0;
// lastPacketlossTime=0;
statistics.messagesInResendBuffer=0;
statistics.bytesInResendBuffer=0;
receivedPacketsBaseIndex=0;
resetReceivedPackets=true;
receivePacketCount=0;
// SetPing( 1000 );
timeBetweenPackets=STARTING_TIME_BETWEEN_PACKETS;
ackPingIndex=0;
ackPingSum=(CCTimeType)0;
nextSendTime=lastUpdateTime;
//nextLowestPingReset=(CCTimeType)0;
// continuousSend=false;
// histogramStart=(CCTimeType)0;
// histogramBitsSent=0;
unacknowledgedBytes=0;
resendLinkedListHead=0;
totalUserDataBytesAcked=0;
datagramHistoryPopCount=0;
InitHeapWeights();
for (int i=0; i < NUMBER_OF_PRIORITIES; i++)
{
statistics.messageInSendBuffer[i]=0;
statistics.bytesInSendBuffer[i]=0.0;
}
for (int i=0; i < RNS_PER_SECOND_METRICS_COUNT; i++)
{
bpsMetrics[i].Reset(_FILE_AND_LINE_);
}
}
//-------------------------------------------------------------------------------------------------------
// Frees all allocated memory
//-------------------------------------------------------------------------------------------------------
void ReliabilityLayer::FreeMemory( bool freeAllImmediately )
{
(void) freeAllImmediately;
FreeThreadSafeMemory();
}
void ReliabilityLayer::FreeThreadSafeMemory( void )
{
unsigned i,j;
InternalPacket *internalPacket;
ClearPacketsAndDatagrams();
for (i=0; i < splitPacketChannelList.Size(); i++)
{
for (j=0; j < splitPacketChannelList[i]->splitPacketList.GetAllocSize(); j++)
{
internalPacket = splitPacketChannelList[i]->splitPacketList[j];
if (internalPacket != nullptr) {
FreeInternalPacketData(internalPacket, _FILE_AND_LINE_);
ReleaseToInternalPacketPool(internalPacket);
}
}
#if PREALLOCATE_LARGE_MESSAGES==1
if (splitPacketChannelList[i]->returnedPacket)
{
FreeInternalPacketData(splitPacketChannelList[i]->returnedPacket, __FILE__, __LINE__ );
ReleaseToInternalPacketPool( splitPacketChannelList[i]->returnedPacket );
}
#endif
SLNet::OP_DELETE(splitPacketChannelList[i], __FILE__, __LINE__);
}
splitPacketChannelList.Clear(false, _FILE_AND_LINE_);
while ( outputQueue.Size() > 0 )
{
internalPacket = outputQueue.Pop();
FreeInternalPacketData(internalPacket, _FILE_AND_LINE_ );
ReleaseToInternalPacketPool( internalPacket );
}
outputQueue.ClearAndForceAllocation( 32, _FILE_AND_LINE_ );
/*
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();
FreeInternalPacketData(internalPacket, _FILE_AND_LINE_ );
ReleaseToInternalPacketPool( internalPacket );
}
SLNet::OP_DELETE(theList, _FILE_AND_LINE_);
}
}
}
orderingList.Clear(false, _FILE_AND_LINE_);
*/
for (i=0; i < NUMBER_OF_ORDERED_STREAMS; i++)
{
for (j=0; j < orderingHeaps[i].Size(); j++)
{
FreeInternalPacketData(orderingHeaps[i][j], _FILE_AND_LINE_ );
ReleaseToInternalPacketPool( orderingHeaps[i][j] );
}
orderingHeaps[i].Clear(true, _FILE_AND_LINE_);
}
//resendList.ForEachData(DeleteInternalPacket);
// resendTree.Clear(_FILE_AND_LINE_);
memset(resendBuffer, 0, sizeof(resendBuffer));
statistics.messagesInResendBuffer=0;
statistics.bytesInResendBuffer=0;
if (resendLinkedListHead)
{
InternalPacket *prev;
InternalPacket *iter = resendLinkedListHead;
for(;;)
{
if (iter->data)
FreeInternalPacketData(iter, _FILE_AND_LINE_ );
prev=iter;
iter=iter->resendNext;
if (iter==resendLinkedListHead)
{
ReleaseToInternalPacketPool(prev);
break;
}
ReleaseToInternalPacketPool(prev);
}
resendLinkedListHead=0;
}
unacknowledgedBytes=0;
// acknowlegements.Clear(_FILE_AND_LINE_);
for ( j=0 ; j < outgoingPacketBuffer.Size(); j++ )
{
if ( outgoingPacketBuffer[ j ]->data)
FreeInternalPacketData( outgoingPacketBuffer[ j ], _FILE_AND_LINE_ );
ReleaseToInternalPacketPool( outgoingPacketBuffer[ j ] );
}
outgoingPacketBuffer.Clear(true, _FILE_AND_LINE_);
#ifdef _DEBUG
for (i = 0; i < delayList.Size(); i++ )
SLNet::OP_DELETE(delayList[ i ], __FILE__, __LINE__);
delayList.Clear(__FILE__, __LINE__);
#endif
unreliableWithAckReceiptHistory.Clear(false, _FILE_AND_LINE_);
packetsToSendThisUpdate.Clear(false, _FILE_AND_LINE_);
packetsToSendThisUpdate.Preallocate(512, _FILE_AND_LINE_);
packetsToDeallocThisUpdate.Clear(false, _FILE_AND_LINE_);
packetsToDeallocThisUpdate.Preallocate(512, _FILE_AND_LINE_);
packetsToSendThisUpdateDatagramBoundaries.Clear(false, _FILE_AND_LINE_);
packetsToSendThisUpdateDatagramBoundaries.Preallocate(128, _FILE_AND_LINE_);
datagramSizesInBytes.Clear(false, _FILE_AND_LINE_);
datagramSizesInBytes.Preallocate(128, _FILE_AND_LINE_);
internalPacketPool.Clear(_FILE_AND_LINE_);
refCountedDataPool.Clear(_FILE_AND_LINE_);
/*
DataStructures::Page<DatagramSequenceNumberType, DatagramMessageIDList*, RESEND_TREE_ORDER> *cur = datagramMessageIDTree.GetListHead();
while (cur)
{
int treeIndex;
for (treeIndex=0; treeIndex < cur->size; treeIndex++)
ReleaseToDatagramMessageIDPool(cur->data[treeIndex]);
cur=cur->resendNext;
}
datagramMessageIDTree.Clear(_FILE_AND_LINE_);
datagramMessageIDPool.Clear(_FILE_AND_LINE_);
*/
while (datagramHistory.Size())
{
RemoveFromDatagramHistory(datagramHistoryPopCount);
datagramHistory.Pop();
datagramHistoryPopCount++;
}
datagramHistoryMessagePool.Clear(_FILE_AND_LINE_);
datagramHistoryPopCount=0;
acknowlegements.Clear();
NAKs.Clear();
unreliableLinkedListHead=0;
}
//-------------------------------------------------------------------------------------------------------
// 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<PluginInterface2*> &messageHandlerList, int mtuSize,
RakNetSocket2 *s, RakNetRandom *rnr, CCTimeType timeRead, BitStream &updateBitStream)
{
// unreferenced parameters
(void)mtuSize;
RakAssert(buffer != nullptr);
#if CC_TIME_TYPE_BYTES == 4
timeRead /= 1000;
#endif
bpsMetrics[(int)ACTUAL_BYTES_RECEIVED].Push1(timeRead, length);
if (length <= 2 || buffer == nullptr) { // Length of 1 is a connection request resend that we just ignore
for (unsigned int messageHandlerIndex = 0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++)
messageHandlerList[messageHandlerIndex]->OnReliabilityLayerNotification("length <= 2 || buffer == nullptr", BYTES_TO_BITS(length), systemAddress, true);
return true;
}
timeLastDatagramArrived = SLNet::GetTimeMS();
// CCTimeType time;
// bool indexFound;
// int count, size;
DatagramSequenceNumberType holeCount;
unsigned i;
#if LIBCAT_SECURITY == 1
if (useSecurity) {
unsigned int received = length;
if (!auth_enc.Decrypt((cat::u8*)buffer, received)) {
return false;
}
length = received;
}
#endif
SLNet::BitStream socketData((unsigned char*)buffer, length, false); // Convert the incoming data to a bitstream for easy parsing
// time = SLNet::GetTimeUS();
// Set to the current time if it is not zero, and we get incoming data
// if (timeResendQueueNonEmpty!=0)
// timeResendQueueNonEmpty=timeRead;
DatagramHeaderFormat dhf;
dhf.Deserialize(&socketData);
if (!dhf.isValid) {
for (unsigned int messageHandlerIndex = 0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++) {
messageHandlerList[messageHandlerIndex]->OnReliabilityLayerNotification("!dhf.isValid", BYTES_TO_BITS(length), systemAddress, true);
}
return true;
}
if (dhf.isACK) {
DatagramSequenceNumberType datagramNumber;
// datagramNumber=dhf.datagramNumber;
#if INCLUDE_TIMESTAMP_WITH_DATAGRAMS == 1
SLNet::TimeMS timeMSLow = (SLNet::TimeMS)timeRead&0xFFFFFFFF;
CCTimeType rtt = timeMSLow-dhf.sourceSystemTime;
#if CC_TIME_TYPE_BYTES == 4
if (rtt > 10000)
#else
if (rtt > 10000000)
#endif
{
// Sanity check. This could happen due to type overflow, especially since I only send the low 4 bytes to reduce bandwidth
rtt=(CCTimeType) congestionManager.GetRTT();
}
// RakAssert(rtt < 500000);
// printf("%i ", (SLNet::TimeMS)(rtt/1000));
ackPing = rtt;
#endif
#ifdef _DEBUG
if (!dhf.hasBAndAS) {
// dhf.B=0;
dhf.AS = 0;
}
#endif
// congestionManager.OnAck(timeRead, rtt, dhf.hasBAndAS, dhf.B, dhf.AS, totalUserDataBytesAcked );
incomingAcks.Clear();
if (!incomingAcks.Deserialize(&socketData)) {
for (unsigned int messageHandlerIndex = 0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++) {
messageHandlerList[messageHandlerIndex]->OnReliabilityLayerNotification("incomingAcks.Deserialize failed", BYTES_TO_BITS(length), systemAddress, true);
}
return false;
}
unsigned int k = 0;
while (k < unreliableWithAckReceiptHistory.Size()) {
if (incomingAcks.IsWithinRange(unreliableWithAckReceiptHistory[k].datagramNumber)) {
InternalPacket *ackReceipt = AllocateFromInternalPacketPool();
AllocInternalPacketData(ackReceipt, 5, false, _FILE_AND_LINE_);
ackReceipt->dataBitLength = BYTES_TO_BITS(5);
ackReceipt->data[0] = (MessageID)ID_SND_RECEIPT_ACKED;
memcpy(ackReceipt->data + sizeof(MessageID), &unreliableWithAckReceiptHistory[k].sendReceiptSerial, sizeof(uint32_t));
outputQueue.Push(ackReceipt, _FILE_AND_LINE_);
// Remove, swap with last
unreliableWithAckReceiptHistory.RemoveAtIndex(k);
} else {
k++;
}
}
// early out, if we've got no outstanding datagramHistory entries
if (datagramHistory.IsEmpty()) {
receivePacketCount++;
return true;
}
for (i = 0; i < incomingAcks.ranges.Size(); i++) {
// note: minIndex is ensured to be always <= maxIndex - otherwise Deserialize() would have failed
RakAssert(incomingAcks.ranges[i].minIndex <= incomingAcks.ranges[i].maxIndex);
if (incomingAcks.ranges[i].maxIndex == (uint24_t)(0xFFFFFFFF)) {
for (unsigned int messageHandlerIndex = 0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++) {
messageHandlerList[messageHandlerIndex]->OnReliabilityLayerNotification("incomingAcks maxIndex is max value", BYTES_TO_BITS(length), systemAddress, true);
}
// it's an invalid incoming package --- let's abort processing (there's no point in continuing processing other ranges if the package is invalid)
return false;
}
for (datagramNumber = incomingAcks.ranges[i].minIndex; datagramNumber <= incomingAcks.ranges[i].maxIndex; datagramNumber++) {
const DatagramSequenceNumberType offsetIntoList = datagramNumber - datagramHistoryPopCount;
if (offsetIntoList >= datagramHistory.Size()) {
// reached the end of the datagramHistory list - hence, we are done
receivePacketCount++;
return true;
}
CCTimeType whenSent;
MessageNumberNode *messageNumberNode = GetMessageNumberNodeByDatagramIndex(datagramNumber, &whenSent);
if (messageNumberNode) {
// printf("%p Got ack for %i\n", this, datagramNumber.val);
#if INCLUDE_TIMESTAMP_WITH_DATAGRAMS==1
congestionManager.OnAck(timeRead, rtt, dhf.hasBAndAS, 0, dhf.AS, totalUserDataBytesAcked, bandwidthExceededStatistic, datagramNumber);
#else
CCTimeType ping;
if (timeRead > whenSent) {
ping = timeRead - whenSent;
} else {
ping = 0;
}
congestionManager.OnAck(timeRead, ping, dhf.hasBAndAS, 0, dhf.AS, totalUserDataBytesAcked, bandwidthExceededStatistic, datagramNumber);
#endif
while (messageNumberNode) {
// TESTING1
// printf("Remove %i on ack for datagramNumber=%i.\n", messageNumberNode->messageNumber.val, datagramNumber.val);
RemovePacketFromResendListAndDeleteOlderReliableSequenced(messageNumberNode->messageNumber, timeRead, messageHandlerList, systemAddress);
messageNumberNode = messageNumberNode->next;
}
RemoveFromDatagramHistory(datagramNumber);
}
// else if (isReliable) {
// // Previously used slot, rather than empty unreliable slot
// printf("%p Ack %i is duplicate\n", this, datagramNumber.val);
//
// congestionManager.OnDuplicateAck(timeRead, datagramNumber);
// }
}
}
} else if (dhf.isNAK) {
// early out, if we've got no outstanding datagramHistory entries
if (datagramHistory.IsEmpty()) {
receivePacketCount++;
return true;
}
DatagramSequenceNumberType messageNumber;
DataStructures::RangeList<DatagramSequenceNumberType> incomingNAKs;
if (!incomingNAKs.Deserialize(&socketData)) {
for (unsigned int messageHandlerIndex = 0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++) {
messageHandlerList[messageHandlerIndex]->OnReliabilityLayerNotification("incomingNAKs.Deserialize failed", BYTES_TO_BITS(length), systemAddress, true);
}
// it's an invalid incoming package --- let's abort processing (there's no point in continuing processing other ranges if the package is invalid)
return false;
}
for (i = 0; i < incomingNAKs.ranges.Size(); i++) {
// note: minIndex is ensured to be always <= maxIndex - otherwise Deserialize() would have failed
RakAssert(incomingNAKs.ranges[i].minIndex <= incomingNAKs.ranges[i].maxIndex);
if (incomingNAKs.ranges[i].maxIndex == (uint24_t)(0xFFFFFFFF)) {
for (unsigned int messageHandlerIndex = 0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++) {
messageHandlerList[messageHandlerIndex]->OnReliabilityLayerNotification("incomingNAKs maxIndex is max value", BYTES_TO_BITS(length), systemAddress, true);
}
return false;
}
// Sanity check
//RakAssert(incomingNAKs.ranges[i].maxIndex.val-incomingNAKs.ranges[i].minIndex.val<1000);
for (messageNumber = incomingNAKs.ranges[i].minIndex; messageNumber <= incomingNAKs.ranges[i].maxIndex; messageNumber++) {
congestionManager.OnNAK(timeRead, messageNumber);
// REMOVEME
// printf("%p NAK %i\n", this, dhf.datagramNumber.val);
const DatagramSequenceNumberType offsetIntoList = messageNumber - datagramHistoryPopCount;
if (offsetIntoList >= datagramHistory.Size()) {
// reached the end of the datagramHistory list - hence, we are done
receivePacketCount++;
return true;
}
CCTimeType timeSent;
MessageNumberNode *messageNumberNode = GetMessageNumberNodeByDatagramIndex(messageNumber, &timeSent);
while (messageNumberNode) {
// Update timers so resends occur immediately
InternalPacket *internalPacket = resendBuffer[messageNumberNode->messageNumber & (uint32_t) RESEND_BUFFER_ARRAY_MASK];
if (internalPacket) {
if (internalPacket->nextActionTime != 0) {
internalPacket->nextActionTime = timeRead;
}
}
messageNumberNode = messageNumberNode->next;
}
}
}
} else {
uint32_t skippedMessageCount;
if (!congestionManager.OnGotPacket(dhf.datagramNumber, dhf.isContinuousSend, timeRead, length, &skippedMessageCount)) {
for (unsigned int messageHandlerIndex = 0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++) {
messageHandlerList[messageHandlerIndex]->OnReliabilityLayerNotification("congestionManager.OnGotPacket failed", BYTES_TO_BITS(length), systemAddress, true);
}
return true;
}
if (dhf.isPacketPair) {
congestionManager.OnGotPacketPair(dhf.datagramNumber, length, timeRead);
}
DatagramHeaderFormat dhfNAK;
dhfNAK.isNAK = true;
uint32_t skippedMessageOffset;
for (skippedMessageOffset = skippedMessageCount; skippedMessageOffset > 0; skippedMessageOffset--) {
NAKs.Insert(dhf.datagramNumber - skippedMessageOffset);
}
remoteSystemNeedsBAndAS = dhf.needsBAndAs;
// Ack dhf.datagramNumber
// Ack even unreliable messages for congestion control, just don't resend them on no ack
#if INCLUDE_TIMESTAMP_WITH_DATAGRAMS==1
SendAcknowledgementPacket(dhf.datagramNumber, dhf.sourceSystemTime);
#else
SendAcknowledgementPacket(dhf.datagramNumber, 0);
#endif
InternalPacket* internalPacket = CreateInternalPacketFromBitStream(&socketData, timeRead);
if (internalPacket == 0) {
for (unsigned int messageHandlerIndex = 0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++) {
messageHandlerList[messageHandlerIndex]->OnReliabilityLayerNotification("CreateInternalPacketFromBitStream failed", BYTES_TO_BITS(length), systemAddress, true);
}
return true;
}
while (internalPacket) {
for (unsigned int messageHandlerIndex=0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++) {
#if CC_TIME_TYPE_BYTES==4
messageHandlerList[messageHandlerIndex]->OnInternalPacket(internalPacket, receivePacketCount, systemAddress, timeRead, false);
#else
messageHandlerList[messageHandlerIndex]->OnInternalPacket(internalPacket, receivePacketCount, systemAddress, (SLNet::TimeMS)(timeRead/(CCTimeType)1000), false);
#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, _FILE_AND_LINE_);
receivedPacketsBaseIndex=0;
resetReceivedPackets=false;
}
// Check for corrupt orderingChannel
if (
internalPacket->reliability == RELIABLE_SEQUENCED ||
internalPacket->reliability == UNRELIABLE_SEQUENCED ||
internalPacket->reliability == RELIABLE_ORDERED
)
{
if (internalPacket->orderingChannel >= NUMBER_OF_ORDERED_STREAMS) {
for (unsigned int messageHandlerIndex = 0; messageHandlerIndex < messageHandlerList.Size(); messageHandlerIndex++) {
messageHandlerList[messageHandlerIndex]->OnReliabilityLayerNotification("internalPacket->orderingChannel >= NUMBER_OF_ORDERED_STREAMS", BYTES_TO_BITS(length), systemAddress, true);
}
bpsMetrics[(int) USER_MESSAGE_BYTES_RECEIVED_IGNORED].Push1(timeRead,BITS_TO_BYTES(internalPacket->dataBitLength));
FreeInternalPacketData(internalPacket, _FILE_AND_LINE_);
ReleaseToInternalPacketPool(internalPacket);