std::size_t Win32NamedPipeClientTransport::implRead(
const ByteBuffer &byteBuffer,
std::size_t bytesRequested)
{
// For now, can't go back to sync calls after doing an async call.
// Limitations with Windows IOCP.
RCF_ASSERT(!mAsyncMode);
std::size_t bytesToRead = RCF_MIN(bytesRequested, byteBuffer.getLength());
BOOL ok = ResetEvent(mhEvent);
DWORD dwErr = GetLastError();
RCF_VERIFY(ok, Exception(_RcfError_Pipe(), dwErr));
OVERLAPPED overlapped = {0};
overlapped.hEvent = mhEvent;
DWORD dwRead = 0;
DWORD dwBytesToRead = static_cast<DWORD>(bytesToRead);
ok = ReadFile(
mhPipe,
byteBuffer.getPtr(),
dwBytesToRead,
&dwRead,
&overlapped);
dwErr = GetLastError();
if (!ok)
{
RCF_VERIFY(
dwErr == ERROR_IO_PENDING ||
dwErr == WSA_IO_PENDING ||
dwErr == ERROR_MORE_DATA,
Exception(_RcfError_ClientReadFail(), dwErr));
}
ClientStub & clientStub = *getTlsClientStubPtr();
DWORD dwRet = WAIT_TIMEOUT;
while (dwRet == WAIT_TIMEOUT)
{
boost::uint32_t timeoutMs = generateTimeoutMs(mEndTimeMs);
timeoutMs = clientStub.generatePollingTimeout(timeoutMs);
dwRet = WaitForSingleObject(overlapped.hEvent, timeoutMs);
dwErr = GetLastError();
RCF_VERIFY(
dwRet == WAIT_OBJECT_0 || dwRet == WAIT_TIMEOUT,
Exception(_RcfError_Pipe(), dwErr));
RCF_VERIFY(
generateTimeoutMs(mEndTimeMs),
Exception(_RcfError_ClientReadTimeout()))
(mEndTimeMs)(bytesToRead);
if (dwRet == WAIT_TIMEOUT)
{
clientStub.onPollingTimeout();
}
}
RCF_ASSERT_EQ(dwRet , WAIT_OBJECT_0);
dwRead = 0;
ok = GetOverlappedResult(mhPipe, &overlapped, &dwRead, FALSE);
dwErr = GetLastError();
RCF_VERIFY(ok && dwRead > 0, Exception(_RcfError_Pipe(), dwErr));
onTimedRecvCompleted(dwRead, 0);
return dwRead;
}
int UdpClientTransport::receive(
I_ClientTransportCallback &clientStub,
ByteBuffer &byteBuffer,
unsigned int timeoutMs)
{
// try to receive a UDP message from server, within the current timeout
RCF_LOG_4()(mSock)(mDestIp.string())(timeoutMs) << "UdpClientTransport - receiving data from socket.";
RCF_ASSERT(!mAsync);
unsigned int startTimeMs = getCurrentTimeMs();
unsigned int endTimeMs = startTimeMs + timeoutMs;
while (true)
{
unsigned int timeoutMs = generateTimeoutMs(endTimeMs);
fd_set fdSet;
FD_ZERO(&fdSet);
FD_SET( static_cast<SOCKET>(mSock), &fdSet);
timeval timeout;
timeout.tv_sec = timeoutMs/1000;
timeout.tv_usec = 1000*(timeoutMs%1000);
int ret = Platform::OS::BsdSockets::select(
mSock+1,
&fdSet,
NULL,
NULL,
&timeout);
int err = Platform::OS::BsdSockets::GetLastError();
RCF_ASSERT(-1 <= ret && ret <= 1)(ret);
if (ret == -1)
{
Exception e(
_RcfError_Socket("select()"),
err,
RcfSubsystem_Os);
RCF_THROW(e);
}
else if (ret == 0)
{
Exception e( _RcfError_ClientReadTimeout() );
RCF_THROW(e);
}
RCF_ASSERT_EQ(ret , 1);
if (mReadVecPtr.get() == NULL || !mReadVecPtr.unique())
{
mReadVecPtr.reset( new ReallocBuffer());
}
// TODO: optimize
ReallocBuffer &buffer = *mReadVecPtr;
buffer.resize(4);
SockAddrStorage fromAddr;
memset(&fromAddr, 0, sizeof(fromAddr));
int fromAddrLen = sizeof(fromAddr);
sockaddr * pDestAddr = NULL;
Platform::OS::BsdSockets::socklen_t destAddrSize = 0;
mDestIp.getSockAddr(pDestAddr, destAddrSize);
int len = Platform::OS::BsdSockets::recvfrom(
mSock,
&buffer[0],
4,
MSG_PEEK,
(sockaddr *) &fromAddr,
&fromAddrLen);
err = Platform::OS::BsdSockets::GetLastError();
if ( len == 4
|| (len == -1 && err == Platform::OS::BsdSockets::ERR_EMSGSIZE))
{
mFromIp.init( (sockaddr&) fromAddr, fromAddrLen, mDestIp.getType());
if (mDestIp.matches(mFromIp))
{
boost::uint32_t dataLength = 0;
memcpy( &dataLength, &buffer[0], 4);
RCF::networkToMachineOrder(&dataLength, 4, 1);
if (getMaxMessageLength())
{
RCF_VERIFY(
0 < dataLength && dataLength <= getMaxMessageLength(),
Exception(_RcfError_ClientMessageLength(dataLength, getMaxMessageLength())));
}
buffer.resize(4+dataLength);
memset(&fromAddr, 0, sizeof(fromAddr));
fromAddrLen = sizeof(fromAddr);
len = Platform::OS::BsdSockets::recvfrom(
mSock,
&buffer[0],
dataLength+4,
0,
(sockaddr *) &fromAddr,
&fromAddrLen);
if (len == static_cast<int>(dataLength+4))
{
mLastResponseSize = dataLength+4;
mRunningTotalBytesReceived += dataLength+4;
byteBuffer = ByteBuffer(
&buffer[4],
dataLength,
4,
mReadVecPtr);
clientStub.onReceiveCompleted();
return 1;
}
}
else
{
// The packet is not a valid response, but we need to read
// it so we can receive more packets.
const std::size_t BufferSize = 4096;
char Buffer[BufferSize];
Platform::OS::BsdSockets::recvfrom(
mSock,
Buffer,
BufferSize,
0,
NULL,
NULL);
}
}
else
{
RCF_THROW( Exception( _RcfError_ClientReadFail() ) )(len)(err);
}
}
}
