path: root/ace/SPIPE_Acceptor.cpp

// SPIPE_Acceptor.cpp
// $Id$

#include "ace/SPIPE_Acceptor.h"
#include "ace/Log_Msg.h"

ACE_RCSID(ace, SPIPE_Acceptor, "$Id$")

ACE_SPIPE_Acceptor::ACE_SPIPE_Acceptor (void)
{
  ACE_TRACE ("ACE_SPIPE_Acceptor::ACE_SPIPE_Acceptor");
}

int
ACE_SPIPE_Acceptor::remove (void)
{
  ACE_TRACE ("ACE_SPIPE_Acceptor::remove");
#if defined (ACE_HAS_STREAM_PIPES)
  int result = this->close ();

  // Remove the underlying file.
  return ACE_OS::unlink (this->local_addr_.get_path_name ()) == -1 
    || result == -1 ? -1 : 0;
#else
  this->close ();
  return 0;
#endif
}

ACE_ALLOC_HOOK_DEFINE (ACE_SPIPE_Acceptor)

void
ACE_SPIPE_Acceptor::dump (void) const
{
  ACE_TRACE ("ACE_SPIPE_Acceptor::dump");
}

// General purpose routine for performing server ACE_SPIPE creation.

int
ACE_SPIPE_Acceptor::open (const ACE_SPIPE_Addr &local_sap, 
			  int /* reuse_addr */,
			  int perms)
{
  ACE_TRACE ("ACE_SPIPE_Acceptor::open");

  this->local_addr_ = local_sap;
  this->set_handle (ACE_INVALID_HANDLE);

  return this->create_new_instance (perms);
}

int
ACE_SPIPE_Acceptor::create_new_instance (int perms)
{
#if defined (ACE_HAS_STREAM_PIPES)
  ACE_HANDLE spipe[2];
  char module[] = "connld";

  ACE_HANDLE handle = ACE_OS::creat (this->local_addr_.get_path_name (),
                                     perms);
  if (handle == ACE_INVALID_HANDLE)
    return -1;
  else if (ACE_OS::close (handle) == -1)
    return -1;
  else if (ACE_OS::pipe (spipe) == -1)
    return -1;
  else if (ACE_OS::ioctl (spipe[0],
                          I_PUSH,
                          module) == -1)
    return -1;
  else if (ACE_OS::fattach (spipe[0],
                            this->local_addr_.get_path_name ()) == -1)
    return -1;

  this->set_handle (spipe[1]);
  return 0;

#elif (defined (ACE_WIN32) && defined (ACE_HAS_WINNT4) && (ACE_HAS_WINNT4 != 0))

  // Create a new instance of the Named Pipe (WIN32).  A new instance
  // of the named pipe must be created for every client process.  If
  // an instance of the named pipe that is already connected to a
  // client process is reused with a new client process,
  // ::ConnectNamedPipe () would fail.

  ACE_UNUSED_ARG (perms);
  ACE_TRACE ("ACE_SPIPE_Acceptor::create_new_instance");
  int status;

  // Create a new instance of the named pipe
  ACE_HANDLE handle = 
#if defined (ACE_USES_WCHAR)
    ::CreateNamedPipeW (
#else /* ACE_USES_WCHAR */
    ::CreateNamedPipeA (
#endif /* ACE_USES_WCHAR */    
        this->local_addr_.get_path_name (),
        PIPE_ACCESS_DUPLEX 
        | FILE_FLAG_OVERLAPPED,
        PIPE_TYPE_MESSAGE 
        | PIPE_READMODE_MESSAGE,
        PIPE_UNLIMITED_INSTANCES,
        1024 * 10,
        1024 * 10,
        ACE_DEFAULT_TIMEOUT,
        NULL);


  if (handle == ACE_INVALID_HANDLE)
    {
      return -1;
    }
  else
    {
      // Start the Connect (analogous to listen () for a socket).  Completion
      // is noted by the event being signalled.  If a client connects
      // before this call, the error status will be ERROR_PIPE_CONNECTED, in
      // which case that fact is remembered via already_connected_ and noted
      // when the user calls accept ().
      // Else the error status should be ERROR_IO_PENDING and the OS will
      // signal the event when it's done.
      this->already_connected_ = FALSE;
      this->set_handle (handle);
      this->overlapped_.hEvent = this->event_.handle ();
      this->event_.reset ();

      BOOL result = ::ConnectNamedPipe (handle, &this->overlapped_);
      ACE_ASSERT (result == FALSE);
      ACE_UNUSED_ARG (result);

      status = ::GetLastError ();
      if (status == ERROR_PIPE_CONNECTED)
	this->already_connected_ = TRUE;
      else if (status != ERROR_IO_PENDING)
	this->close ();        // Sets handle to ACE_INVALID_HANDLE
    }
  return (this->get_handle () == ACE_INVALID_HANDLE ? -1 : 0);
#else
  ACE_UNUSED_ARG (perms);
  ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_STREAM_PIPES */
}

int
ACE_SPIPE_Acceptor::close (void)
{
  ACE_TRACE ("ACE_SPIPE_Acceptor::close");

  // This behavior is shared by UNIX and Win32...
  int result = this->ACE_SPIPE::close ();
  this->set_handle (ACE_INVALID_HANDLE);

#if defined (ACE_HAS_STREAM_PIPES)
  ACE_OS::fdetach (this->local_addr_.get_path_name ());
#endif /* ACE_HAS_STREAM_PIPES */
  return result;
}

ACE_SPIPE_Acceptor::ACE_SPIPE_Acceptor (const ACE_SPIPE_Addr &local_sap, 
					int reuse_addr,
					int perms)
{
  ACE_TRACE ("ACE_SPIPE_Acceptor::ACE_SPIPE_Acceptor");

  if (this->open (local_sap, reuse_addr, perms) == -1)
    ACE_ERROR ((LM_ERROR,
                ACE_LIB_TEXT ("%p\n"),
                ACE_LIB_TEXT ("ACE_SPIPE_Acceptor")));
}

// General purpose routine for accepting new connections.

int
ACE_SPIPE_Acceptor::accept (ACE_SPIPE_Stream &new_io, 
			    ACE_SPIPE_Addr *remote_addr,
			    ACE_Time_Value *timeout, 
			    int restart,
                            int reset_new_handle)
{
  ACE_TRACE ("ACE_SPIPE_Acceptor::accept");
  ACE_UNUSED_ARG (reset_new_handle);

#if defined (ACE_HAS_STREAM_PIPES)
  strrecvfd r_handle;

  // Note that if THIS->MILLI_SECOND_DELAY == -1 we block on
  // ACE_OS::ioctl (). Otherwise, we will wait for the desired number
  // of milli seconds using ACE_OS::poll.

  if (timeout != 0 && 
      ACE::handle_timed_accept (this->get_handle (),
                                timeout,
                                restart) == -1)
    return -1;
  else if (ACE_OS::ioctl (this->get_handle (),
                          I_RECVFD,
                          &r_handle) == -1)
    return -1;

  new_io.set_handle (r_handle.fd);
  new_io.local_addr_ = this->local_addr_;
  new_io.remote_addr_.set_size (sizeof r_handle.gid + sizeof r_handle.uid);
  new_io.remote_addr_.group_id (r_handle.gid);
  new_io.remote_addr_.user_id (r_handle.uid);

  // This is for compatibility with ACE_SOCK_Acceptor and
  // ACE_TLI_Acceptor.
  if (remote_addr != 0)
    *remote_addr = new_io.remote_addr_;

  return 0;
#elif (defined (ACE_WIN32) && defined (ACE_HAS_WINNT4) && (ACE_HAS_WINNT4 != 0))
  ACE_UNUSED_ARG (restart);
  ACE_UNUSED_ARG (remote_addr);

  // Check to see if we have a valid pipe
  if (this->get_handle () == ACE_INVALID_HANDLE)
    return -1;

  // open () started the Connect in asynchronous mode.  Wait for the event
  // in the OVERLAPPED structure to be signalled, then grab the status.
  if (this->already_connected_ == FALSE)
    {
      if (timeout != 0)
	{
	  ACE_Time_Value abstime (ACE_OS::gettimeofday () + *timeout);
	  if (this->event_.wait (&abstime) == -1)
	    return -1;
	}
      else
	if (this->event_.wait () == -1)
	  return -1;

      // Should be here with the ConnectNamedPipe operation complete.
      // Steal the already_connected_ flag to record the results.
      DWORD unused;
      this->already_connected_ = ::GetOverlappedResult (this->get_handle (),
						       &this->overlapped_,
						       &unused,
						       FALSE);
    }

  if (this->already_connected_)
    {
      new_io.set_handle (this->get_handle ());
      this->set_handle (ACE_INVALID_HANDLE);
      new_io.local_addr_ = this->local_addr_;

      // Create a new instance of the pipe for the next connection.
      this->create_new_instance ();
      return 0;
    }
  return -1;
#else
  ACE_UNUSED_ARG (restart);
  ACE_UNUSED_ARG (timeout);
  ACE_UNUSED_ARG (remote_addr);
  ACE_UNUSED_ARG (new_io);
  ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_STREAM_PIPES */
}