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// --------------------------------------------------------------------------
//
// File
// Name: WinNamedPipeListener.h
// Purpose: Windows named pipe socket connection listener
// for server
// Created: 2008/09/30
//
// --------------------------------------------------------------------------
#ifndef WINNAMEDPIPELISTENER__H
#define WINNAMEDPIPELISTENER__H
#include "autogen_ConnectionException.h"
#include "autogen_ServerException.h"
#include "OverlappedIO.h"
#include "WinNamedPipeStream.h"
#include "MemLeakFindOn.h"
// --------------------------------------------------------------------------
//
// Class
// Name: WinNamedPipeListener
// Purpose:
// Created: 2008/09/30
//
// --------------------------------------------------------------------------
template<int ListenBacklog = 128>
class WinNamedPipeListener
{
private:
std::auto_ptr<std::string> mapPipeName;
std::auto_ptr<OverlappedIO> mapOverlapConnect;
HANDLE mPipeHandle;
public:
// Initialise
WinNamedPipeListener()
: mPipeHandle(INVALID_HANDLE_VALUE)
{ }
private:
WinNamedPipeListener(const WinNamedPipeListener &rToCopy)
{ /* forbidden */ }
HANDLE CreatePipeHandle(const std::string& rName)
{
std::string socket = WinNamedPipeStream::sPipeNamePrefix +
rName;
HANDLE handle = CreateNamedPipeA(
socket.c_str(), // pipe name
PIPE_ACCESS_DUPLEX | // read/write access
FILE_FLAG_OVERLAPPED, // enabled overlapped I/O
PIPE_TYPE_BYTE |
PIPE_READMODE_BYTE |
PIPE_WAIT, // blocking mode
ListenBacklog + 1, // max. instances
4096, // output buffer size
4096, // input buffer size
NMPWAIT_USE_DEFAULT_WAIT, // client time-out
NULL); // default security attribute
if (handle == INVALID_HANDLE_VALUE)
{
THROW_WIN_FILE_ERRNO("Failed to create named pipe",
socket, GetLastError(), ServerException,
SocketOpenError);
}
return handle;
}
public:
~WinNamedPipeListener()
{
Close();
}
void Close()
{
if (mPipeHandle != INVALID_HANDLE_VALUE)
{
if (mapOverlapConnect.get())
{
// outstanding connect in progress
if (CancelIo(mPipeHandle) != TRUE)
{
BOX_LOG_WIN_ERROR("Failed to cancel "
"outstanding connect request "
"on named pipe");
}
mapOverlapConnect.reset();
}
if (CloseHandle(mPipeHandle) != TRUE)
{
BOX_LOG_WIN_ERROR("Failed to close named pipe "
"handle");
}
mPipeHandle = INVALID_HANDLE_VALUE;
}
}
// ------------------------------------------------------------------
//
// Function
// Name: WinNamedPipeListener::Listen(std::string name)
// Purpose: Initialises socket name
// Created: 2003/07/31
//
// ------------------------------------------------------------------
void Listen(const std::string& rName)
{
Close();
mapPipeName.reset(new std::string(rName));
mPipeHandle = CreatePipeHandle(rName);
}
// ------------------------------------------------------------------
//
// Function
// Name: WinNamedPipeListener::Accept(int)
// Purpose: Accepts a connection, returning a pointer to
// a class of the specified type. May return a
// null pointer if a signal happens, or there's
// a timeout. Timeout specified in
// milliseconds, defaults to infinite time.
// Created: 2003/07/31
//
// ------------------------------------------------------------------
std::auto_ptr<WinNamedPipeStream> Accept(int Timeout = INFTIM,
const char* pLogMsgOut = NULL)
{
if(!mapPipeName.get())
{
THROW_EXCEPTION(ServerException, BadSocketHandle);
}
BOOL connected = FALSE;
std::auto_ptr<WinNamedPipeStream> mapStream;
if (!mapOverlapConnect.get())
{
// start a new connect operation
mapOverlapConnect.reset(new OverlappedIO());
connected = ConnectNamedPipe(mPipeHandle,
&mapOverlapConnect->mOverlapped);
if (connected == FALSE)
{
if (GetLastError() == ERROR_PIPE_CONNECTED)
{
connected = TRUE;
}
else if (GetLastError() != ERROR_IO_PENDING)
{
BOX_LOG_WIN_ERROR("Failed to connect "
"named pipe");
THROW_EXCEPTION(ServerException,
SocketAcceptError);
}
}
}
if (connected == FALSE)
{
// wait for connection
DWORD result = WaitForSingleObject(
mapOverlapConnect->mOverlapped.hEvent,
(Timeout == INFTIM) ? INFINITE : Timeout);
if (result == WAIT_OBJECT_0)
{
DWORD dummy;
if (!GetOverlappedResult(mPipeHandle,
&mapOverlapConnect->mOverlapped,
&dummy, TRUE))
{
BOX_LOG_WIN_ERROR("Failed to get "
"overlapped connect result");
THROW_EXCEPTION(ServerException,
SocketAcceptError);
}
connected = TRUE;
}
else if (result == WAIT_TIMEOUT)
{
return mapStream; // contains NULL
}
else if (result == WAIT_ABANDONED)
{
BOX_ERROR("Wait for named pipe connection "
"was abandoned by the system");
THROW_EXCEPTION(ServerException,
SocketAcceptError);
}
else if (result == WAIT_FAILED)
{
BOX_LOG_WIN_ERROR("Failed to wait for named "
"pipe connection");
THROW_EXCEPTION(ServerException,
SocketAcceptError);
}
else
{
BOX_ERROR("Failed to wait for named pipe "
"connection: unknown return code " <<
result);
THROW_EXCEPTION(ServerException,
SocketAcceptError);
}
}
ASSERT(connected == TRUE);
mapStream.reset(new WinNamedPipeStream(mPipeHandle));
mPipeHandle = CreatePipeHandle(*mapPipeName);
mapOverlapConnect.reset();
return mapStream;
}
};
#include "MemLeakFindOff.h"
#endif // WINNAMEDPIPELISTENER__H
|
