path: root/TAO/tao/Strategies/DIOP_Connection_Handler.cpp

// $Id$

#include "tao/Strategies/DIOP_Connection_Handler.h"

#if defined (TAO_HAS_DIOP) && (TAO_HAS_DIOP != 0)

#include "tao/Timeprobe.h"
#include "tao/debug.h"
#include "tao/ORB_Core.h"
#include "tao/ORB.h"
#include "tao/CDR.h"
#include "tao/Server_Strategy_Factory.h"
#include "tao/Transport_Cache_Manager.h"
#include "tao/Thread_Lane_Resources.h"
#include "tao/Base_Transport_Property.h"
#include "tao/Protocols_Hooks.h"
#include "tao/Resume_Handle.h"

#include "tao/Strategies/DIOP_Transport.h"
#include "tao/Strategies/DIOP_Endpoint.h"

#include "ace/os_include/netinet/os_tcp.h"
#include "ace/os_include/os_netdb.h"

ACE_RCSID(tao, DIOP_Connect, "$Id$")


TAO_BEGIN_VERSIONED_NAMESPACE_DECL

TAO_DIOP_Connection_Handler::TAO_DIOP_Connection_Handler (ACE_Thread_Manager *t)
  : TAO_DIOP_SVC_HANDLER (t, 0 , 0),
    TAO_Connection_Handler (0),
    dscp_codepoint_ (IPDSFIELD_DSCP_DEFAULT << 2)
{
  // This constructor should *never* get called, it is just here to
  // make the compiler happy: the default implementation of the
  // Creation_Strategy requires a constructor with that signature, we
  // don't use that implementation, but some (most?) compilers
  // instantiate it anyway.
  ACE_ASSERT (0);
}


TAO_DIOP_Connection_Handler::TAO_DIOP_Connection_Handler (TAO_ORB_Core *orb_core,
                                                          CORBA::Boolean flag)
  : TAO_DIOP_SVC_HANDLER (orb_core->thr_mgr (), 0, 0),
    TAO_Connection_Handler (orb_core),
    dscp_codepoint_ (IPDSFIELD_DSCP_DEFAULT << 2)
{
  TAO_DIOP_Transport* specific_transport = 0;
  ACE_NEW (specific_transport,
           TAO_DIOP_Transport(this, orb_core, flag));

  // store this pointer (indirectly increment ref count)
  this->transport (specific_transport);
}


TAO_DIOP_Connection_Handler::~TAO_DIOP_Connection_Handler (void)
{
  delete this->transport ();
  int const result =
    this->release_os_resources ();

  if (result == -1 && TAO_debug_level)
    {
      ACE_ERROR ((LM_ERROR,
                  ACE_TEXT("TAO (%P|%t) - DIOP_Connection_Handler::")
                  ACE_TEXT("~DIOP_Connection_Handler, ")
                  ACE_TEXT("release_os_resources() failed %m\n")));
    }
  this->udp_socket_.close ();
}

// DIOP Additions - Begin
ACE_HANDLE
TAO_DIOP_Connection_Handler::get_handle (void) const
{
  return this->udp_socket_.get_handle ();
}


const ACE_INET_Addr &
TAO_DIOP_Connection_Handler::addr (void)
{
  return this->addr_;
}


void
TAO_DIOP_Connection_Handler::addr (const ACE_INET_Addr &addr)
{
  this->addr_ = addr;
}


const ACE_INET_Addr &
TAO_DIOP_Connection_Handler::local_addr (void)
{
  return local_addr_;
}


void
TAO_DIOP_Connection_Handler::local_addr (const ACE_INET_Addr &addr)
{
  local_addr_ = addr;
}


const ACE_SOCK_Dgram &
TAO_DIOP_Connection_Handler::dgram (void)
{
  return this->udp_socket_;
}
// DIOP Additions - End

int
TAO_DIOP_Connection_Handler::open_handler (void *v)
{
  return this->open (v);
}

int
TAO_DIOP_Connection_Handler::open (void*)
{
  // Currently, the DIOP properties are not used.  This code is here
  // for consistency with other protocols.
  TAO_DIOP_Protocol_Properties protocol_properties;

  TAO_Protocols_Hooks *tph = this->orb_core ()->get_protocols_hooks ();

  bool const client = this->transport ()->opened_as () == TAO::TAO_CLIENT_ROLE;

  try
    {
      if (client)
        {
          tph->client_protocol_properties_at_orb_level (protocol_properties);
        }
      else
        {
          tph->server_protocol_properties_at_orb_level (protocol_properties);
        }
    }
  catch ( ::CORBA::Exception&)
    {
      return -1;
    }

  this->udp_socket_.open (this->local_addr_);

  if (TAO_debug_level > 5)
  {
     ACE_DEBUG ((LM_DEBUG,
                 ACE_TEXT("\nTAO (%P|%t) TAO_DIOP_Connection_Handler::open -")
                 ACE_TEXT("listening on: <%s:%u>\n"),
                 ACE_TEXT_CHAR_TO_TCHAR (this->local_addr_.get_host_name ()),
                 this->local_addr_.get_port_number ()));
  }

  // Set that the transport is now connected, if fails we return -1
  // Use C-style cast b/c otherwise we get warnings on lots of
  // compilers
  if (!this->transport ()->post_open ((size_t) this->get_handle ()))
    return -1;

  this->state_changed (TAO_LF_Event::LFS_SUCCESS,
                       this->orb_core ()->leader_follower ());

  return 0;
}

int
TAO_DIOP_Connection_Handler::open_server (void)
{
  this->udp_socket_.open (this->local_addr_);
  if( TAO_debug_level > 5)
  {
     ACE_DEBUG ((LM_DEBUG,
                 ACE_TEXT("\nTAO (%P|%t) TAO_DIOP_Connection_Handler::open_server -")
                 ACE_TEXT("listening on %s:%d\n"),
                 ACE_TEXT_CHAR_TO_TCHAR (this->local_addr_.get_host_name ()),
                 this->local_addr_.get_port_number ()
               ));
  }

  this->transport ()->id ((size_t) this->get_handle ());

  return 0;
}

int
TAO_DIOP_Connection_Handler::resume_handler (void)
{
  return ACE_Event_Handler::ACE_APPLICATION_RESUMES_HANDLER;
}

int
TAO_DIOP_Connection_Handler::close_connection (void)
{
  return this->close_connection_eh (this);
}

int
TAO_DIOP_Connection_Handler::handle_input (ACE_HANDLE h)
{
  return this->handle_input_eh (h, this);
}

int
TAO_DIOP_Connection_Handler::handle_output (ACE_HANDLE handle)
{
  int result =
    this->handle_output_eh (handle, this);

  if (result == -1)
    {
      this->close_connection ();
      return 0;
    }

  return result;
}

int
TAO_DIOP_Connection_Handler::handle_timeout (const ACE_Time_Value &,
                                             const void *)
{
  // We don't use this upcall from the Reactor.  However, we should
  // override this since the base class returns -1 which will result
  // in handle_close() getting called.
  return 0;
}

int
TAO_DIOP_Connection_Handler::handle_close (ACE_HANDLE,
                                           ACE_Reactor_Mask)
{
  // No asserts here since the handler is registered with the Reactor
  // and the handler ownership is given to the Reactor.  When the
  // Reactor closes, it will call handle_close() on the handler.  It
  // is however important to overwrite handle_close() to do nothing
  // since the base class does too much.
  return 0;
}

int
TAO_DIOP_Connection_Handler::close (u_long)
{
  return this->close_handler ();
}

int
TAO_DIOP_Connection_Handler::release_os_resources (void)
{
  return this->peer ().close ();
}

int
TAO_DIOP_Connection_Handler::set_dscp_codepoint (CORBA::Boolean set_network_priority)
{
  int tos = IPDSFIELD_DSCP_DEFAULT << 2;

  if (set_network_priority)
    {
      TAO_Protocols_Hooks *tph =
        this->orb_core ()->get_protocols_hooks ();

      CORBA::Long codepoint =
        tph->get_dscp_codepoint ();

      tos = (int)(codepoint) << 2;
    }

  if (tos != this->dscp_codepoint_)
    {
      int result = this->dgram ().set_option (IPPROTO_IP,
                                              IP_TOS,
                                              (int *) &tos ,
                                              (int) sizeof (tos));

      if (TAO_debug_level)
        {
          ACE_DEBUG ((LM_DEBUG,
                      "TAO (%P|%t) - DIOP_Connection_Handler::"
                      "set_dscp_codepoint -> dscp: %x; result: %d; %s\n",
                      tos,
                      result,
                      result == -1 ? "try running as superuser" : ""));
        }

      // On successful setting of TOS field.
      if (result == 0)
        this->dscp_codepoint_ = tos;

    }

  return 0;
}

TAO_END_VERSIONED_NAMESPACE_DECL

#endif /* TAO_HAS_DIOP && TAO_HAS_DIOP != 0 */