HRESULT Read(SOCKET socket, MemoryBuffer& buffer)
{
const size_t position = buffer.GetPosition();
const size_t size = buffer.GetSize();
int length = static_cast<int>(size - position);
char* data = reinterpret_cast<char*>(buffer.GetData()) + position;
const int status = recv(socket, data, length, 0);
if (status <= 0)
{
const DWORD code = WSAGetLastError();
const HRESULT result = (WSAEWOULDBLOCK == code) ? S_FALSE : E_FAIL;
return result;
}
length -= status;
buffer.SetPosition(position + status);
if (length > 0)
{
return S_FALSE;
}
return S_OK;
}
HRESULT CLrpStClientImpl::Invoke(MemoryBuffer& buffer)
{
uint32 size = static_cast<uint32>(buffer.GetSize());
if (size < sizeof(uint32))
{
throw runtime_error("Input buffer is too small");
}
buffer.SetPosition(0);
WriteInt32(size - 4, buffer);
buffer.SetPosition(12);
uint16 componentId = ReadUInt16(buffer);
uint16 methodId = ReadUInt16(buffer);
Translate(componentId, methodId);
buffer.SetPosition(12);
WriteUInt16(componentId, buffer);
WriteUInt16(methodId, buffer);
CTimeout timeout(m_operationTimeoutInMs);
if (!SendEx(m_socket, timeout, buffer.GetData(), buffer.GetSize()))
{
closesocket(m_socket);
m_socket = INVALID_SOCKET;
throw runtime_error("Couldn't send data");
}
if (!ReceiveEx(m_socket, timeout, buffer))
{
closesocket(m_socket);
m_socket = INVALID_SOCKET;
throw runtime_error("Couldn't receive data");
}
buffer.SetPosition(12);
const HRESULT result = ReadInt32(buffer);
return result;
}
HRESULT Write(SOCKET socket, MemoryBuffer& buffer)
{
const size_t position = buffer.GetPosition();
const size_t size = buffer.GetSize();
int length = static_cast<int>(size - position);
const char* data = reinterpret_cast<const char*>(buffer.GetData()) + position;
const int status = send(socket, data, length, 0);
if (status < 0)
{
return E_FAIL;
}
length -= status;
buffer.SetPosition(position + status);
if (length > 0)
{
return S_FALSE;
}
return S_OK;
}