//! 重载接收事件
void OnReceive()
{
for (BlockBuffer::Iterator iter = I_.Begin(); iter; iter += 1)
{
if (iPacketBegin_ != -1)
{
if (*iter == '\x3')
{
OnPacket(iPacketBegin_ + 1, iter.O_);
iPacketBegin_ = -1;
}
else
{
if (iter.O_ > iPacketBegin_+254)
OnOverflow(iter);
}
}
else
{
if (*iter == '\x2')
iPacketBegin_ = iter.O_;
}
}
if (iPacketBegin_ == -1)
I_.Clear();
}
static void OnUartData()
{
// UART receiving buffer: PACKET structure
static byte s_uartData[sizeof(PACKET)];
// -1 indicates magic byte not received yet
static int s_cbUartData = -1;
byte b = UART_RECV();
if (s_cbUartData < 0)
{
// Not started yet, looking for the magic byte
if (b == UART_PACKET_MAGIC)
{
// Found magic byte, start receiving from next incoming byte
s_cbUartData = 0;
}
}
else
{
// The logic will make sure s_cbUartData is less than UART_PACKET_SIZE here
s_uartData[s_cbUartData] = b;
s_cbUartData ++;
if (s_cbUartData == sizeof(PACKET))
{
// Reset packet byte counter for next packet
s_cbUartData = -1;
OnPacket((const PACKET*)s_uartData);
}
}
}
BOOL CHostBrowser::StreamPacketsG2()
{
ASSUME_LOCK( Transfers.m_pSection );
ASSERT( m_nProtocol == PROTOCOL_G2 );
while ( CG2Packet* pPacket = CG2Packet::ReadBuffer( m_pBuffer ) )
{
BOOL bSuccess = FALSE;
try
{
bSuccess = OnPacket( pPacket );
}
catch ( CException* pException )
{
pException->Delete();
}
pPacket->Release();
if ( ! bSuccess )
{
Stop();
return FALSE;
}
}
return TRUE;
}
BOOL CHostBrowser::StreamPacketsG2()
{
CG2Packet* pPacket;
while ( pPacket = CG2Packet::ReadBuffer( m_pBuffer ) )
{
BOOL bSuccess = FALSE;
try
{
bSuccess = OnPacket( pPacket );
}
catch ( CException* pException )
{
pException->Delete();
}
pPacket->Release();
if ( ! bSuccess )
{
Stop();
return FALSE;
}
}
return TRUE;
}
BOOL CDCNeighbour::ProcessPackets(CBuffer* pInput)
{
if ( ! pInput )
return FALSE;
BOOL bSuccess = TRUE;
while ( CDCPacket* pPacket = CDCPacket::ReadBuffer( pInput ) )
{
try
{
bSuccess = OnPacket( pPacket );
}
catch ( CException* pException )
{
pException->Delete();
}
pPacket->Release();
if ( ! bSuccess )
break;
if ( m_pZInput && m_pZInput != pInput )
// Compression just turned on
break;
}
return bSuccess;
}
void CG2Node::OnRead()
{
if( !Network.m_pSection.tryLock(50) )
{
emit readyRead(); // it is a queued connection, lets requeue the missed signal
return;
}
//qDebug() << "CG2Node::OnRead";
if( m_nState == nsHandshaking )
{
if( peek(bytesAvailable()).indexOf("\r\n\r\n") != -1 )
{
if( m_bInitiated )
{
ParseOutgoingHandshake();
}
else
{
ParseIncomingHandshake();
}
}
}
else if ( m_nState == nsConnected )
{
G2Packet* pPacket = 0;
try
{
while( (pPacket = G2Packet::ReadBuffer(GetInputBuffer())) )
{
m_tLastPacketIn = time(0);
m_nPacketsIn++;
OnPacket(pPacket);
pPacket->Release();
}
}
catch(...)
{
if( pPacket )
{
qDebug() << pPacket->ToHex() << "\n" << pPacket->ToASCII();
pPacket->Release();
}
qDebug() << "Packet error - " << m_oAddress.toString().toAscii();
m_nState = nsClosing;
emit NodeStateChanged();
deleteLater();
}
}
Network.m_pSection.unlock();
}
BOOL CHostBrowser::StreamPacketsG1()
{
ASSUME_LOCK( Transfers.m_pSection );
ASSERT( m_nProtocol == PROTOCOL_G1 );
BOOL bSuccess = TRUE;
for ( ; bSuccess; )
{
GNUTELLAPACKET* pPacket = (GNUTELLAPACKET*)m_pBuffer->m_pBuffer;
if ( m_pBuffer->m_nLength < sizeof( *pPacket ) ) break;
DWORD nLength = sizeof( *pPacket ) + pPacket->m_nLength;
if ( pPacket->m_nLength < 0 || nLength >= (DWORD)Settings.Gnutella.MaximumPacket * 8 )
{
theApp.Message( MSG_ERROR, IDS_BROWSE_PACKET_ERROR, (LPCTSTR)m_sAddress );
Stop();
return FALSE;
}
if ( m_pBuffer->m_nLength < nLength ) break;
CG1Packet* pPacketObject = CG1Packet::New( pPacket );
try
{
bSuccess = OnPacket( pPacketObject );
}
catch ( CException* pException )
{
pException->Delete();
}
pPacketObject->Release();
m_pBuffer->Remove( nLength );
}
if ( ! bSuccess )
Stop();
return bSuccess;
}
void CChatSessionG2::OnRead()
{
if( m_nState == csHandshaking )
{
if(Peek(bytesAvailable()).indexOf("\r\n\r\n") != -1)
{
if(m_bInitiated)
{
ParseOutgoingHandshake();
}
else
{
//ParseIncomingHandshake();
}
}
}
else if( m_nState == csConnected || m_nState == csActive )
{
G2Packet* pPacket = 0;
try
{
while((pPacket = G2Packet::ReadBuffer(GetInputBuffer())))
{
OnPacket(pPacket);
pPacket->Release();
}
}
catch(...)
{
if(pPacket)
{
pPacket->Release();
}
emit systemMessage("Received corrupted G2 packet, connection lost.");
CNetworkConnection::Close();
}
m_bReadyReadSent = false;
}
}
bool PeerClient::OnRead()
{
bool bSuccess = true;
if(!TcpConnection::OnRead()) return false;
PPPacket* pPacket = NULL;
while(true)
{
pPacket = PPPacket::FromBuffer(m_pInput);
if(pPacket == NULL)
{
break;
}
OnPacket(pPacket);
pPacket->Release();
}
return bSuccess;
}
void CPacketizer::operator() (char* buffer, size_t bufSize)
{
// copy over the input buffer into existing buffer.
std::copy( (const boost::uint8_t *)buffer,
(const boost::uint8_t *)buffer + bufSize,
std::back_inserter(buffer_) );
int32_t bytesProcessed=0;
int32_t bytesRemaining=buffer_.size();
// process the block
while ( bytesRemaining > 0 )
{
if (bytesRemaining < hdrLength_)
{
// get more data
return;
}
char hdr[hdrLength_+1];
memset(hdr, 0, sizeof(hdr));
// copy first headerlength from buffer_ to character array
for (int32_t i=0; i<hdrLength_; i++)
{
hdr[i]=buffer_[i];
}
int32_t bodyLen=0;
int32_t n=sscanf(hdr, "%d", &bodyLen);
std::ostringstream tmp;
tmp << "Header is - " <<hdr << " " << n << std::endl;
LOG_ERROR(tmp.str());
if ( n != 1 )
{
// something is wrong
buffer_.clear(); // drop the buffer
std::ostringstream errorStr;
errorStr << "Error - " << strerror(errno) <<
" in scanning header buffer " << hdr <<
" . for body length - " << std::endl;
LOG_ERROR(errorStr.str());
return;
}
bytesProcessed += hdrLength_;
bytesRemaining -= hdrLength_;
if (bytesRemaining < bodyLen )
{
return; // get more data to complete body
}
char body[bodyLen + 1];
memset(body, 0, sizeof(body));
for(int i=0; i<bodyLen; i++)
{
body[i]=buffer_[i+bytesProcessed];
}
// just print out what you received
std::ostringstream debugStr;
debugStr<< "Body - " << body << std::endl;
LOG_DEBUG(debugStr.str());
// raise signal for passing data to client
// TODO - its fine now since we are using a single thread, going
// forward we need to ensure that the buffers are unique enough !!
OnPacket(body, bodyLen );
bytesProcessed += bodyLen;
// clean up buffer_ by erasing the values already processed
// note that we are erasing elements only after the body is
// processed. This ensures that incomplete body is processed in the
// same loop
buffer_.erase(buffer_.begin(),
buffer_.begin() + bytesProcessed);
bytesRemaining -= bodyLen;
}
}
