int SFProtobufProtocol::tryDeframeIncomingPacket(DataBuffer& Buffer, BasePacket*& pPacket, int& packetId, unsigned int& nExtractedBytes)
{
if(Buffer.GetDataSize() < 8)
return SFProtocol::eIncompletePacket;
char* pBuffer = Buffer.GetBuffer();
unsigned int sStart = 0;
unsigned int packetLen = 0;
packetId = 0;
unsigned int sEnd = 0;
for (int i=0; i<2; i++)
{
*((BYTE*)(&sStart)+i)=pBuffer[i];
*((BYTE*)(&packetLen)+i)=pBuffer[i+2];
*((BYTE*)(&packetId) + i) = pBuffer[i + 4];
}
if (sStart!=SignatureStart)
return SFProtocol::eCorruptPacket;
if (packetLen > Buffer.GetDataSize())
return SFProtocol::eIncompletePacket;
for (int i=0; i<2; i++)
*((BYTE*)(&sEnd)+i)=pBuffer[packetLen-2+i];
if(sEnd!=SignatureEnd)
return SFProtocol::eCorruptPacket;
char* pData = pBuffer + 6;
unsigned int dataSize = packetLen - 8;
nExtractedBytes = packetLen;
pPacket = CreateIncomingPacketFromPacketId(packetId);
if(pPacket==NULL)
return SFProtocol::eUndefinedFailure;
if(!pPacket->Decode(pData, dataSize))
{
disposeIncomingPacket(pPacket);
return SFProtocol::eDecodingFailure;
}
return SFProtocol::Success;
}
BasePacket* SFAvroProtocol::GetPacket(int& errorCode)
{
errorCode = PACKETIO_ERROR_NONE;
SFPacketHeader header;
if (false == m_pPacketIOBuffer->GetHeader(header, errorCode))
return NULL;
BasePacket* pPacket = CreateIncomingPacketFromPacketId(header.packetID);
if (pPacket == NULL)
return NULL;
SFAvroPacketImpl* pAvroPacket = (SFAvroPacketImpl*)pPacket;
memcpy(pAvroPacket->GetHeader(), &header, sizeof(SFPacketHeader));
char dataBuffer[8096] = { 0, };
if (false == m_pPacketIOBuffer->GetPacket(header, dataBuffer, m_packetSize, errorCode))
{
DisposePacket(pPacket);
return NULL;
}
if (false == pPacket->Decode(dataBuffer, header.dataSize))
{
errorCode = PACKETIO_ERROR_DATA;
DisposePacket(pPacket);
return NULL;
}
pPacket->SetPacketID(header.packetID);
return pPacket;
}
