Stream::StreamID ASIOReadBuffer::processPartialChunk(uint8* dataBuffer, uint32 packetLength, uint32 &bufferReceived, Chunk&retval) {
unsigned int headerLength=bufferReceived;
Stream::StreamID retid;
retid.unserialize(dataBuffer,headerLength);
assert(headerLength<=bufferReceived&&"High water mark must be greater than maximum StreamID size");
bufferReceived-=headerLength;
assert(headerLength<=packetLength&&"High water mark must be greater than maximum StreamID size");
retval.resize(packetLength-headerLength);
if (packetLength>headerLength) {
std::memcpy(&*retval.begin(),dataBuffer+headerLength,bufferReceived);
}
return retid;
}
void MultiplexedSocket::shutDownClosedStream(unsigned int controlCode,const Stream::StreamID &id) {
if (controlCode==TCPStream::TCPStreamCloseStream){
std::deque<StreamIDCallbackPair> registrations;
CommitCallbacks(registrations,CONNECTED,false);
CallbackMap::iterator where=mCallbacks.find(id);
if (where!=mCallbacks.end()) {
std::tr1::shared_ptr<AtomicValue<int> > sendStatus=where->second->mSendStatus.lock();
if (sendStatus) {
TCPStream::closeSendStatus(*sendStatus);
}
where->second->mConnectionCallback(Stream::Disconnected,"Remote Host Disconnected");
CommitCallbacks(registrations,CONNECTED,false);//just in case stream committed new callbacks during callback
where=mCallbacks.find(id);
delete where->second;
mCallbacks.erase(where);
}
}
std::tr1::unordered_set<Stream::StreamID>::iterator where=mOneSidedClosingStreams.find(id);
if (where!=mOneSidedClosingStreams.end()) {
mOneSidedClosingStreams.erase(where);
}
if (id.odd()==((mHighestStreamID.read()&1)?true:false)) {
mFreeStreamIDs.push(id);
}
}
Stream::ReceivedResponse MultiplexedSocket::receiveFullChunk(unsigned int whichSocket, Stream::StreamID id,Chunk&newChunk){
Stream::ReceivedResponse retval = Stream::AcceptedData;
if (id==Stream::StreamID()) {//control packet
if(newChunk.size()) {
unsigned int controlCode=*newChunk.begin();
switch (controlCode) {
case TCPStream::TCPStreamCloseStream:
case TCPStream::TCPStreamAckCloseStream:
if (newChunk.size()>1) {
unsigned int avail_len=newChunk.size()-1;
id.unserialize((const uint8*)&(newChunk[1]),avail_len);
if (avail_len+1>newChunk.size()) {
SILOG(tcpsst,warning,"Control Chunk too short");
}
}
if (id!=Stream::StreamID()) {
std::tr1::unordered_map<Stream::StreamID,unsigned int>::iterator where=mAckedClosingStreams.find(id);
if (where!=mAckedClosingStreams.end()){
where->second++;
int how_much=where->second;
if (where->second==mSockets.size()) {
mAckedClosingStreams.erase(where);
shutDownClosedStream(controlCode,id);
if (controlCode==TCPStream::TCPStreamCloseStream) {
closeStream(getSharedPtr(),id,TCPStream::TCPStreamAckCloseStream);
}
}
}else{
if (mSockets.size()==1) {
shutDownClosedStream(controlCode,id);
if (controlCode==TCPStream::TCPStreamCloseStream) {
closeStream(getSharedPtr(),id,TCPStream::TCPStreamAckCloseStream);
}
}else {
mAckedClosingStreams[id]=1;
}
}
}
break;
default:
break;
}
}
}else {
std::deque<StreamIDCallbackPair> registrations;
CommitCallbacks(registrations,CONNECTED,false);
CallbackMap::iterator where=mCallbacks.find(id);
if (where!=mCallbacks.end()) {
retval=where->second->mBytesReceivedCallback(newChunk);
}else if (mOneSidedClosingStreams.find(id)==mOneSidedClosingStreams.end()) {
//new substream
TCPStream*newStream=new TCPStream(getSharedPtr(),id);
TCPSetCallbacks setCallbackFunctor(this,newStream);
mNewSubstreamCallback(newStream,setCallbackFunctor);
if (setCallbackFunctor.mCallbacks != NULL) {
CommitCallbacks(registrations,CONNECTED,false);//make sure bytes are received
retval=setCallbackFunctor.mCallbacks->mBytesReceivedCallback(newChunk);
}else {
closeStream(getSharedPtr(),id);
}
}else {
//IGNORED MESSAGE
}
}
return retval;
}
Chunk*ASIOSocketWrapper::constructControlPacket(const MultiplexedSocketPtr &thus, TCPStream::TCPStreamControlCodes code,const Stream::StreamID&sid) {
const unsigned int max_size=16;
switch (thus->getStreamType()) {
case TCPStream::BASE64_ZERODELIM: {
uint8 dataStream[max_size+Stream::StreamID::MAX_HEX_SERIALIZED_LENGTH+1];
Stream::StreamID controlStream;//control packet
unsigned int streamidsize=0;
unsigned int size=streamidsize=controlStream.serializeToHex(&dataStream[0],max_size);
assert(size<max_size);
dataStream[size++]=code;
unsigned int cur=size;
size=max_size-cur;
size=sid.serialize(&dataStream[cur],size);
assert(size+cur<=max_size);
MemoryReference serializedStreamId(dataStream,streamidsize);
return toBase64ZeroDelim(MemoryReference(dataStream+streamidsize,size+cur-streamidsize),MemoryReference(NULL,0),MemoryReference(NULL,0),&serializedStreamId);
}
break;
case TCPStream::RFC_6455: {
uint8 dataStream[max_size + Stream::StreamID::MAX_SERIALIZED_LENGTH + 2];
unsigned int packetHeaderLength = 2;
unsigned int size = max_size;
unsigned int cur = packetHeaderLength;
Stream::StreamID controlStream;
unsigned int streamidsize = controlStream.serialize(&dataStream[cur], max_size);
assert(streamidsize < max_size);
cur += streamidsize;
dataStream[cur++] = code;
size = max_size - cur;
size = sid.serialize(&dataStream[cur], size);
assert(size + cur <= max_size);
MemoryReference serializedStreamId(&dataStream[packetHeaderLength], streamidsize);
dataStream[0] = 0x80 | 0x02 ; // Flags = FIN/Unfragmented, Opcode = 2: binary data
dataStream[1] = size + cur - packetHeaderLength; // Less than 125.
return new Chunk(dataStream, dataStream + size + cur);
}
break;
case TCPStream::LENGTH_DELIM:
default: {
uint8 dataStream[max_size+VariableLength::MAX_SERIALIZED_LENGTH+Stream::StreamID::MAX_SERIALIZED_LENGTH];
unsigned int size=max_size;
Stream::StreamID controlStream;//control packet
size=controlStream.serialize(&dataStream[VariableLength::MAX_SERIALIZED_LENGTH],size);
assert(size<max_size);
dataStream[VariableLength::MAX_SERIALIZED_LENGTH+size++]=code;
unsigned int cur=VariableLength::MAX_SERIALIZED_LENGTH+size;
size=max_size-cur;
size=sid.serialize(&dataStream[cur],size);
assert(size+cur<=max_size);
VariableLength streamSize=VariableLength(size+cur-VariableLength::MAX_SERIALIZED_LENGTH);
unsigned int actualHeaderLength=streamSize.serialize(dataStream,VariableLength::MAX_SERIALIZED_LENGTH);
if (actualHeaderLength!=VariableLength::MAX_SERIALIZED_LENGTH) {
unsigned int retval=streamSize.serialize(dataStream+VariableLength::MAX_SERIALIZED_LENGTH-actualHeaderLength,VariableLength::MAX_SERIALIZED_LENGTH);
assert(retval==actualHeaderLength);
}
return new Chunk(dataStream+VariableLength::MAX_SERIALIZED_LENGTH-actualHeaderLength,dataStream+size+cur);
}
break;
}
}
