sciop_connection_handler.cpp

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#include "SCIOP_Connection_Handler.h"

#if TAO_HAS_SCIOP == 1

// [e-mail]: The purpose of this is to allow RH9 to build
// SCIOR Profile support even without a functioning SCTP implementation

#ifndef IPPROTO_SCTP
#  include "netinet/sctp.h"
#else // !IPPROTO_SCTP
#  ifndef SCTP_NODELAY
#    define SCTP_NODELAY 1
#  endif // !SCTP_NODELAY
#endif

#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 "SCIOP_Transport.h"
#include "SCIOP_Endpoint.h"
#include "tao/Transport_Cache_Manager.h"
#include "tao/Thread_Lane_Resources.h"
#include "tao/Base_Transport_Property.h"
#include "tao/Resume_Handle.h"
#include "tao/Protocols_Hooks.h"
#include "tao/Wait_Strategy.h"

#if !defined (__ACE_INLINE__)
# include "SCIOP_Connection_Handler.i"
#endif /* ! __ACE_INLINE__ */


ACE_RCSID (tao,
           SCIOP_Connection_Handler,
           "SCIOP_Connection_Handler.cpp,v 1.7 2003/08/06 14:20:43 gthaker Exp")


TAO_SCIOP_Connection_Handler::TAO_SCIOP_Connection_Handler (ACE_Thread_Manager *t)
  : TAO_SCIOP_SVC_HANDLER (t, 0 , 0),
    TAO_Connection_Handler (0),
    dscp_codepoint_ (0)
{
  // 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_SCIOP_Connection_Handler::TAO_SCIOP_Connection_Handler (TAO_ORB_Core *orb_core,
                                                          CORBA::Boolean flag,
                                                          void *arg)
  : TAO_SCIOP_SVC_HANDLER (orb_core->thr_mgr (), 0, 0),
    TAO_Connection_Handler (orb_core),
    tcp_properties_ (*(ACE_static_cast
                     (TAO_SCIOP_Properties *, arg)))
{
  TAO_SCIOP_Transport* specific_transport = 0;
  ACE_NEW (specific_transport,
           TAO_SCIOP_Transport (this, orb_core, flag));

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

TAO_SCIOP_Connection_Handler::TAO_SCIOP_Connection_Handler (TAO_ORB_Core *orb_core,
                                                          void *arg)
  : TAO_SCIOP_SVC_HANDLER (orb_core->thr_mgr (), 0, 0),
    TAO_Connection_Handler (orb_core),
    tcp_properties_ (*(ACE_static_cast
                       (TAO_SCIOP_Properties *, arg))),
    dscp_codepoint_ (0)
{
}


TAO_SCIOP_Connection_Handler::~TAO_SCIOP_Connection_Handler (void)
{
  delete this->transport ();
}

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

int
TAO_SCIOP_Connection_Handler::open (void*)
{
  if (this->set_socket_option (this->peer (),
                               this->tcp_properties_.send_buffer_size,
                               this->tcp_properties_.recv_buffer_size) == -1)
    return -1;

#if !defined (ACE_LACKS_TCP_NODELAY)

  if (this->peer ().set_option (IPPROTO_SCTP,
                                SCTP_NODELAY,
                                (void *) &tcp_properties_.no_delay,
                                sizeof (int)) == -1)
    return -1;
#endif /* ! ACE_LACKS_TCP_NODELAY */

  if (this->transport ()->wait_strategy ()->non_blocking ())
    {
      if (this->peer ().enable (ACE_NONBLOCK) == -1)
        return -1;
    }

  // Called by the <Strategy_Acceptor> when the handler is
  // completely connected.

  ACE_INET_Addr remote_addr;
  if (this->peer ().get_remote_addr (remote_addr) == -1)
    return -1;

  ACE_INET_Addr local_addr;
  if (this->peer ().get_local_addr (local_addr) == -1)
    return -1;

  if (local_addr.get_ip_address () == remote_addr.get_ip_address ()
      && local_addr.get_port_number () == remote_addr.get_port_number ())
    {
      if (TAO_debug_level > 0)
        {
          ACE_TCHAR remote_as_string[MAXHOSTNAMELEN + 16];
          ACE_TCHAR local_as_string[MAXHOSTNAMELEN + 16];

          (void) remote_addr.addr_to_string (remote_as_string,
                                             sizeof(remote_as_string));
          (void) local_addr.addr_to_string (local_as_string,
                                            sizeof(local_as_string));
          ACE_ERROR ((LM_ERROR,
                      ACE_LIB_TEXT("TAO(%P|%t) - TAO_SCIOP_Connection_Handler::open, ")
                      ACE_LIB_TEXT("Holy Cow! The remote addr and ")
                      ACE_LIB_TEXT("local addr are identical (%s == %s)\n"),
                      remote_as_string, local_as_string));
        }
      return -1;
    }

  if (TAO_debug_level > 0)
    {
      ACE_TCHAR client[MAXHOSTNAMELEN + 16];

      // Verify that we can resolve the peer hostname.
      if (remote_addr.addr_to_string (client, sizeof (client)) == -1)
        return -1;

      ACE_DEBUG ((LM_DEBUG,
                  ACE_LIB_TEXT ("TAO (%P|%t) - Connection_Handler::open, SCIOP ")
                  ACE_LIB_TEXT ("connection to peer <%s> on %d\n"),
                  client, this->peer ().get_handle ()));
    }

  // Set the id in the transport now that we're active.
  // Use C-style cast b/c otherwise we get warnings on lots of compilers
  this->transport ()->id ((size_t) this->get_handle ());

  this->state_changed (TAO_LF_Event::LFS_SUCCESS);

  return 0;
}

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

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

int
TAO_SCIOP_Connection_Handler::handle_input (ACE_HANDLE h)
{
  int result =
    this->handle_input_eh (h, this);

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

  return result;
}

int
TAO_SCIOP_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_SCIOP_Connection_Handler::handle_timeout (const ACE_Time_Value &,
                                              const void *)
{
  // We don't use this upcall for I/O.  This is only used by the
  // Connector to indicate that the connection timedout.  Therefore,
  // we should call close().
  return this->close ();
}

int
TAO_SCIOP_Connection_Handler::handle_close (ACE_HANDLE,
                                            ACE_Reactor_Mask)
{
  ACE_ASSERT (0);
  return 0;
}

int
TAO_SCIOP_Connection_Handler::close (u_long)
{
  this->state_changed (TAO_LF_Event::LFS_CONNECTION_CLOSED);
  this->transport ()->remove_reference ();
  return 0;
}

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

int
TAO_SCIOP_Connection_Handler::add_transport_to_cache (void)
{
  ACE_INET_Addr addr;

  // Get the peername.
  if (this->peer ().get_remote_addr (addr) == -1)
    return -1;

  // Construct an  SCIOP_Endpoint object
  TAO_SCIOP_Endpoint endpoint (
      addr,
      this->orb_core()->orb_params()->use_dotted_decimal_addresses ());

  // Construct a property object
  TAO_Base_Transport_Property prop (&endpoint);

  TAO_Transport_Cache_Manager &cache =
    this->orb_core ()->lane_resources ().transport_cache ();

  // Idle the transport..
  return cache.cache_idle_transport (&prop,
                                     this->transport ());

}

int
TAO_SCIOP_Connection_Handler::process_listen_point_list (
    IIOP::ListenPointList &listen_list)
{
  // Get the size of the list
  CORBA::ULong len = listen_list.length ();

  for (CORBA::ULong i = 0; i < len; ++ i)
    {
      IIOP::ListenPoint listen_point = listen_list[i];
      ACE_INET_Addr addr (listen_point.port,
                          listen_point.host.in ());

      if (TAO_debug_level > 0)
        {
          ACE_DEBUG ((LM_DEBUG,
                      ACE_LIB_TEXT("(%P|%t) Listening port [%d] on [%s]\n"),
                      listen_point.port,
                      ACE_TEXT_CHAR_TO_TCHAR(listen_point.host.in ())));
        }

      // Construct an  SCIOP_Endpoint object
      TAO_SCIOP_Endpoint endpoint (addr,
        this->orb_core()->orb_params()->use_dotted_decimal_addresses ());

      // Construct a property object
      TAO_Base_Transport_Property prop (&endpoint);

      // Mark the connection as bidirectional
      prop.set_bidir_flag (1);

      // The property for this handler has changed. Recache the
      // handler with this property
      int retval = this->transport ()->recache_transport (&prop);
      if (retval == -1)
        return retval;

      // Make the handler idle and ready for use
      this->transport ()->make_idle ();
    }

  return 0;
}

void
TAO_SCIOP_Connection_Handler::update_protocol_properties (
   int send_buffer_size,
   int recv_buffer_size,
   int no_delay,
   int enable_network_priority)
  /* @todo Properties should be those of SCIOP ilk.
  TimeBase::TimeT rto_initial,
  TimeBase::TimeT rto_min,
  TimeBase::TimeT rto_max,
  CORBA::Float rto_alpha,
  CORBA::Float rto_beta,
  TimeBase::TimeT valid_cookie_life,
  CORBA::Short association_max_retrans,
  CORBA::Short path_max_retrans,
  CORBA::Short max_init_retransmits,
  TimeBase::TimeT hb_interval,
  CORBA::Short association_max_retrans)
  */
{
  if (TAO_debug_level)
    ACE_DEBUG ((LM_DEBUG,
                "TAO_SCIOP_Connection_Handler::update_protocol_properties\n"
                "enable_network_priority = %d\n",
                enable_network_priority));

  if (this->tcp_properties_.send_buffer_size != send_buffer_size)
    this->tcp_properties_.send_buffer_size = send_buffer_size;

  if (this->tcp_properties_.recv_buffer_size != recv_buffer_size)
    this->tcp_properties_.recv_buffer_size = recv_buffer_size;

  if (this->tcp_properties_.no_delay != no_delay)
    this->tcp_properties_.no_delay = no_delay;

  if (this->tcp_properties_.enable_network_priority != enable_network_priority)
    this->tcp_properties_.enable_network_priority = enable_network_priority;

}

int
TAO_SCIOP_Connection_Handler::enable_network_priority (void)
{
  return this->tcp_properties_.enable_network_priority;
}

int
TAO_SCIOP_Connection_Handler::set_dscp_codepoint (void)
{
  int tos;
  if (this->enable_network_priority ())
    {
      ACE_DECLARE_NEW_CORBA_ENV;
      ACE_TRY
        {
          TAO_Protocols_Hooks *tph =
            this->orb_core ()->get_protocols_hooks (
              ACE_ENV_SINGLE_ARG_PARAMETER);
          ACE_TRY_CHECK;

          if (tph != 0)
            {
              CORBA::Long codepoint =
                tph->get_dscp_codepoint ();

              tos = (int)(codepoint) << 2;
            }
        }
      ACE_CATCHANY
        {
          if (TAO_debug_level > 0)
            ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                                 "TAO_SCIOP_Connection_Handler::"
                                 "set_dscp_codepoint - "
                                 "get_protocol_hooks");

          return -1;
        }
      ACE_ENDTRY;
      ACE_CHECK_RETURN (-1);
    }
  else
    tos = IPDSFIELD_DSCP_DEFAULT << 2;

  if (tos != this->dscp_codepoint_)
    {
      int ret = this->peer ().set_option (IPPROTO_SCTP,
                                          IP_TOS,
                                          (int *) &tos ,
                                          (int) sizeof (tos));

      if(TAO_debug_level)
        {
          ACE_DEBUG ((LM_DEBUG,
                      "TAO (%P|%t) - SCIOP_Connection_Handler::"
                      "set_dscp_codepoint, failed to set Diffserv"
                      " codepoint - try running as superuser\n"));

          ACE_DEBUG((LM_DEBUG,
                     "TAO (%P|%t) - SCIOP_Connection_Handler::"
                     "set_dscp_codepoint, set tos: ret: %d %x\n",
                     ret, tos));
        }

      this->dscp_codepoint_ = tos;
    }

  return 0;
}

// ****************************************************************

#if defined (ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION)

template class ACE_Svc_Handler<ACE_SOCK_SEQPACK_Association, ACE_NULL_SYNCH>;

#elif defined (ACE_HAS_TEMPLATE_INSTANTIATION_PRAGMA)

#pragma instantiate ACE_Svc_Handler<ACE_SOCK_SEQPACK_Association, ACE_NULL_SYNCH>

#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION */

#endif /* TAO_HAS_SCIOP == 1 */