void AsioSessionState::doRegularFraming(size_t bytesTransferred)
{
RCF_ASSERT_LTEQ(bytesTransferred , mReadBufferRemaining);
mReadBufferRemaining -= bytesTransferred;
if (mReadBufferRemaining > 0)
{
beginRead();
}
else if (mReadBufferRemaining == 0 && mIssueZeroByteRead)
{
if (!mAppReadBufferPtr || !mAppReadBufferPtr.unique())
{
mAppReadBufferPtr = getObjectPool().getReallocBufferPtr();
}
mAppReadBufferPtr->resize(4);
mReadBufferRemaining = 4;
mIssueZeroByteRead = false;
beginRead();
}
else
{
RCF_ASSERT_EQ(mReadBufferRemaining , 0);
if (mState == ReadingDataCount)
{
ReallocBuffer & readBuffer = *mAppReadBufferPtr;
RCF_ASSERT_EQ(readBuffer.size() , 4);
unsigned int packetLength = 0;
memcpy(&packetLength, &readBuffer[0], 4);
networkToMachineOrder(&packetLength, 4, 1);
if ( mTransport.getMaxMessageLength()
&& packetLength > mTransport.getMaxMessageLength())
{
sendServerError(RcfError_ServerMessageLength);
}
else
{
readBuffer.resize(packetLength);
mReadBufferRemaining = packetLength;
mState = ReadingData;
beginRead();
}
}
else if (mState == ReadingData)
{
mState = Ready;
mTransport.getSessionManager().onReadCompleted(
getSessionPtr());
}
}
}
void UdpServerTransport::cycle(int timeoutMs)
{
RCF::ThreadInfoPtr tiPtr = getTlsThreadInfoPtr();
RCF::ThreadPool & threadPool = tiPtr->getThreadPool();
if (threadPool.shouldStop())
{
return;
}
// poll the UDP socket for messages, and read a message if one is available
fd_set fdSet;
FD_ZERO(&fdSet);
FD_SET( static_cast<SOCKET>(mFd), &fdSet);
timeval timeout;
timeout.tv_sec = timeoutMs/1000;
timeout.tv_usec = 1000*(timeoutMs%1000);
int ret = Platform::OS::BsdSockets::select(
mFd+1,
&fdSet,
NULL,
NULL,
timeoutMs < 0 ? NULL : &timeout);
int err = Platform::OS::BsdSockets::GetLastError();
if (ret == 1)
{
SessionStatePtr sessionStatePtr = getTlsUdpSessionStatePtr();
if (sessionStatePtr.get() == NULL)
{
sessionStatePtr = SessionStatePtr(new SessionState(*this));
sessionStatePtr->mSessionPtr = getSessionManager().createSession();
sessionStatePtr->mSessionPtr->setSessionState(*sessionStatePtr);
setTlsUdpSessionStatePtr(sessionStatePtr);
}
{
// read a message
ReallocBufferPtr &readVecPtr =
sessionStatePtr->mReadVecPtr;
if (readVecPtr.get() == NULL || !readVecPtr.unique())
{
readVecPtr.reset( new ReallocBuffer());
}
ReallocBuffer &buffer = *readVecPtr;
SockAddrStorage from;
int fromlen = sizeof(from);
memset(&from, 0, sizeof(from));
buffer.resize(4);
int len = Platform::OS::BsdSockets::recvfrom(
mFd,
&buffer[0],
4,
MSG_PEEK,
(sockaddr *) &from,
&fromlen);
err = Platform::OS::BsdSockets::GetLastError();
sessionStatePtr->mRemoteAddress.init(
(sockaddr&) from,
fromlen,
mIpAddress.getType());
if (!isIpAllowed(sessionStatePtr->mRemoteAddress))
{
RCF_LOG_2()(sessionStatePtr->mRemoteAddress.getIp())
<< "Client IP does not match server's IP access rules. Closing connection.";
discardPacket(mFd);
}
else if ( len == 4
|| (len == -1 && err == Platform::OS::BsdSockets::ERR_EMSGSIZE))
{
unsigned int dataLength = 0;
memcpy(&dataLength, &buffer[0], 4);
networkToMachineOrder(&dataLength, 4, 1);
if (getMaxMessageLength() && dataLength > getMaxMessageLength())
{
ByteBuffer byteBuffer;
encodeServerError(getSessionManager(), byteBuffer, RcfError_ServerMessageLength);
byteBuffer.expandIntoLeftMargin(4);
* (boost::uint32_t *) ( byteBuffer.getPtr() ) =
static_cast<boost::uint32_t>(byteBuffer.getLength()-4);
RCF::machineToNetworkOrder(byteBuffer.getPtr(), 4, 1);
char *buffer = byteBuffer.getPtr();
std::size_t bufferLen = byteBuffer.getLength();
sockaddr * pRemoteAddr = NULL;
Platform::OS::BsdSockets::socklen_t remoteAddrSize = 0;
sessionStatePtr->mRemoteAddress.getSockAddr(pRemoteAddr, remoteAddrSize);
int len = sendto(
mFd,
buffer,
static_cast<int>(bufferLen),
0,
pRemoteAddr,
remoteAddrSize);
RCF_UNUSED_VARIABLE(len);
discardPacket(mFd);
}
else
{
buffer.resize(4+dataLength);
memset(&from, 0, sizeof(from));
fromlen = sizeof(from);
len = Platform::OS::BsdSockets::recvfrom(
mFd,
&buffer[0],
4+dataLength,
0,
(sockaddr *) &from,
&fromlen);
if (static_cast<unsigned int>(len) == 4+dataLength)
{
getSessionManager().onReadCompleted(sessionStatePtr->mSessionPtr);
}
}
}
else
{
discardPacket(mFd);
}
}
}
else if (ret == 0)
{
//RCF_LOG_4()(mFd)(mPort)(timeoutMs) << "UdpServerTransport - no messages received within polling interval.";
}
else if (ret == -1)
{
Exception e(
_RcfError_Socket("select()"),
err,
RcfSubsystem_Os);
RCF_THROW(e)(mFd)(mIpAddress.string())(err);
}
}
void AsioSessionState::onReadWrite(
size_t bytesTransferred,
const boost::system::error_code& error)
{
RCF_ASSERT(!error);
RCF_ASSERT(!mReflecting);
{
switch(mState)
{
case ReadingDataCount:
case ReadingData:
RCF_ASSERT(
bytesTransferred <= mReadBufferRemaining)
(bytesTransferred)(mReadBufferRemaining);
mReadBufferRemaining -= bytesTransferred;
if (mReadBufferRemaining > 0)
{
invokeAsyncRead();
}
else
{
RCF_ASSERT(mReadBufferRemaining == 0)(mReadBufferRemaining);
if (mState == ReadingDataCount)
{
std::vector<char> &readBuffer = getReadBuffer();
RCF_ASSERT(readBuffer.size() == 4)(readBuffer.size());
unsigned int packetLength = 0;
memcpy(&packetLength, &readBuffer[0], 4);
networkToMachineOrder(&packetLength, 4, 1);
if (packetLength <= mTransport.getMaxMessageLength())
{
readBuffer.resize(packetLength);
mReadBufferRemaining = packetLength;
mState = ReadingData;
invokeAsyncRead();
}
else
{
sendServerError(RcfError_ServerMessageLength);
}
}
else if (mState == ReadingData)
{
mState = Ready;
mTransport.getSessionManager().onReadCompleted(
getSessionPtr());
if (mTransport.mInterrupt)
{
mTransport.mInterrupt = false;
mTransport.mDemuxerPtr->stop();
}
}
}
break;
case WritingData:
RCF_ASSERT(
bytesTransferred <= mWriteBufferRemaining)
(bytesTransferred)(mWriteBufferRemaining);
mWriteBufferRemaining -= bytesTransferred;
if (mWriteBufferRemaining > 0)
{
invokeAsyncWrite();
}
else
{
if (mCloseAfterWrite)
{
int fd = implGetNative();
const int BufferSize = 8*1024;
char buffer[BufferSize];
while (recv(fd, buffer, BufferSize, 0) > 0);
}
else
{
mState = Ready;
mSlicedWriteByteBuffers.resize(0);
mWriteByteBuffers.resize(0);
mTransport.getSessionManager().onWriteCompleted(
getSessionPtr());
if (mTransport.mInterrupt)
{
mTransport.mInterrupt = false;
mTransport.mDemuxerPtr->stop();
}
}
}
break;
default:
RCF_ASSERT(0);
}
}
}
void UdpServerTransport::cycle(
int timeoutMs,
const volatile bool &) //stopFlag
{
// poll the UDP socket for messages, and read a message if one is available
fd_set fdSet;
FD_ZERO(&fdSet);
FD_SET( static_cast<SOCKET>(mFd), &fdSet);
timeval timeout;
timeout.tv_sec = timeoutMs/1000;
timeout.tv_usec = 1000*(timeoutMs%1000);
int ret = Platform::OS::BsdSockets::select(
mFd+1,
&fdSet,
NULL,
NULL,
timeoutMs < 0 ? NULL : &timeout);
int err = Platform::OS::BsdSockets::GetLastError();
if (ret == 1)
{
SessionStatePtr sessionStatePtr = getCurrentUdpSessionStatePtr();
if (sessionStatePtr.get() == NULL)
{
sessionStatePtr = SessionStatePtr(new SessionState(*this));
SessionPtr sessionPtr = getSessionManager().createSession();
sessionPtr->setProactor(*sessionStatePtr);
sessionStatePtr->mSessionPtr = sessionPtr;
setCurrentUdpSessionStatePtr(sessionStatePtr);
RcfSessionPtr rcfSessionPtr =
boost::static_pointer_cast<RcfSession>(sessionPtr);
rcfSessionPtr->mIoState = RcfSession::Reading;
}
{
// read a message
boost::shared_ptr<std::vector<char> > &readVecPtr =
sessionStatePtr->mReadVecPtr;
if (readVecPtr.get() == NULL || !readVecPtr.unique())
{
readVecPtr.reset( new std::vector<char>());
}
std::vector<char> &buffer = *readVecPtr;
sockaddr from;
int fromlen = sizeof(from);
memset(&from, 0, sizeof(from));
buffer.resize(4);
int len = Platform::OS::BsdSockets::recvfrom(
mFd,
&buffer[0],
4,
MSG_PEEK,
&from,
&fromlen);
err = Platform::OS::BsdSockets::GetLastError();
if (isClientAddrAllowed( *(sockaddr_in *) &from ) &&
(len == 4 || (len == -1 && err == Platform::OS::BsdSockets::ERR_EMSGSIZE)))
{
sockaddr_in *remoteAddr = reinterpret_cast<sockaddr_in*>(&from);
sessionStatePtr->remoteAddress = IpAddress(*remoteAddr);
unsigned int dataLength = 0;
memcpy(&dataLength, &buffer[0], 4);
networkToMachineOrder(&dataLength, 4, 1);
if (dataLength <= static_cast<unsigned int>(getMaxMessageLength()))
{
buffer.resize(4+dataLength);
memset(&from, 0, sizeof(from));
fromlen = sizeof(from);
len = Platform::OS::BsdSockets::recvfrom(
mFd,
&buffer[0],
4+dataLength,
0,
&from,
&fromlen);
if (static_cast<unsigned int>(len) == 4+dataLength)
{
getSessionManager().onReadCompleted(sessionStatePtr->mSessionPtr);
}
}
else
{
ByteBuffer byteBuffer;
encodeServerError(byteBuffer, RcfError_ServerMessageLength);
byteBuffer.expandIntoLeftMargin(4);
* (boost::uint32_t *) ( byteBuffer.getPtr() ) =
static_cast<boost::uint32_t>(byteBuffer.getLength()-4);
RCF::machineToNetworkOrder(byteBuffer.getPtr(), 4, 1);
char *buffer = byteBuffer.getPtr();
std::size_t bufferLen = byteBuffer.getLength();
const sockaddr_in &remoteAddr =
sessionStatePtr->remoteAddress.getSockAddr();
int len = sendto(
mFd,
buffer,
static_cast<int>(bufferLen),
0,
(const sockaddr *) &remoteAddr,
sizeof(remoteAddr));
RCF_UNUSED_VARIABLE(len);
discardPacket(mFd);
}
}
else
{
// discard the message (sender ip not allowed, or message format bad)
discardPacket(mFd);
}
}
}
else if (ret == 0)
{
RCF_TRACE("server udp poll - no messages")(mFd)(mPort);
}
else if (ret == -1)
{
RCF_THROW(
Exception(
RcfError_Socket,
err,
RcfSubsystem_Os,
"udp server select() failed "))
(mFd)(mPort)(err);
}
}
