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// -*- C++ -*-
// $Id$
// ============================================================================
//
// = LIBRARY
// TAO
//
// = FILENAME
// GIOP_Message.h
//
// = DESCRIPTION
// Interface for the GIOP messaging protocol
//
// = AUTHOR
// Copyright 1994-1995 by Sun Microsystems Inc.,
// Balachandran Natarajan <bala@cs.wustl.edu>
//
// ============================================================================
#ifndef _TAO_GIOP_MESSAGE_H_
#define _TAO_GIOP_MESSAGE_H_
#include "tao/Pluggable_Messaging.h"
#include "tao/GIOP_Utils.h"
class TAO_Export TAO_GIOP_Message_Base :
public TAO_Pluggable_Messaging_Interface
{
// = TITLE
// Definitions of client side of the GIOP specific stuff
//
// = DESCRIPTION
// This class will hold the specific details common to all the
// GIOP versions. Some of them which are here may be shifted if
// things start changing between versions
// IMPORTANT: This code was based on the GIOP.h & GIOP.cpp
public:
TAO_GIOP_Message_Base (void);
virtual ~TAO_GIOP_Message_Base (void);
// Dtor
virtual CORBA::Boolean write_protocol_header (TAO_Pluggable_Message_Type t,
TAO_OutputCDR &msg);
// Shouldnt be needed here but for compilation
int handle_input (TAO_Transport *transport,
TAO_ORB_Core *orb_core,
TAO_Message_State_Factory &mesg_state,
ACE_Time_Value *max_time_value = 0);
virtual CORBA::Boolean
write_message_header (const TAO_Pluggable_Connector_Params ¶ms,
TAO_Pluggable_Header_Type header_type,
TAO_Target_Specification &spec,
TAO_OutputCDR &msg);
// Write the header.
int send_message (TAO_Transport *transport,
TAO_OutputCDR &stream,
ACE_Time_Value *max_wait_time = 0,
TAO_Stub *stub = 0);
virtual int parse_reply (TAO_Message_State_Factory &mesg_state,
TAO_Pluggable_Connector_Params ¶ms,
CORBA::ULong &reply_status) = 0;
// Parse the reply message from the server
int process_connector_messages (TAO_Transport *transport,
TAO_ORB_Core *orb_core,
TAO_InputCDR &input,
CORBA::Octet message_type) = 0;
// Processes the messages from the connectors so that they can be
// passed on to the appropriate states.
protected:
virtual const size_t header_len (void);
// This will give the size of the header for different versions of
// GIOP.
virtual const size_t message_size_offset (void);
// This will give the message_size offset as specified by different
// versions of GIOP
virtual const size_t major_version_offset (void);
// This will give the major_version offset as specified by different
// versions of GIOP
virtual const size_t minor_version_offset (void);
// This will give the minor_version offset as specified by different
// versions of GIOP
virtual const size_t flags_offset (void);
// This will give the flags offset as specified by different
// versions of GIOP
// virtual const size_t message_size_offset (void);
// This will give the message size offset as specified by different
// versions of GIOP
virtual const size_t message_type_offset (void);
// This will give the message type offset as specified by different
// versions of GIOP
// @@The above methods may not be required. But we have it for a
// later date use wherein things can changes in GIOP
int send_error (TAO_Transport *transport);
private:
virtual CORBA::Octet major_version (void) = 0;
virtual CORBA::Octet minor_version (void) = 0;
virtual CORBA::Boolean
write_request_header (const IOP::ServiceContextList& svc_ctx,
CORBA::ULong request_id,
CORBA::Octet response_flags,
TAO_Target_Specification &spec,
const char* opname,
TAO_OutputCDR &msg) = 0;
// Write the GIOP request header.
virtual CORBA::Boolean
write_locate_request_header (CORBA::ULong request_id,
TAO_Target_Specification &spec,
TAO_OutputCDR &msg) = 0;
// Write the GIOP locate request header.
int read_bytes_input (TAO_Transport *transport,
TAO_InputCDR &input,
CORBA::ULong read_size,
ACE_Time_Value *max_wait_time);
virtual int validate_version (TAO_GIOP_Message_State *state) = 0;
virtual int parse_header (TAO_GIOP_Message_State *state);
virtual int parse_magic_bytes (TAO_GIOP_Message_State *state);
ssize_t read_buffer (TAO_Transport *transport,
char *buf,
size_t len,
ACE_Time_Value *max_wait_time);
// The above method seems to be redundant with read_input_bytes. I
// will trim it down in the next iteration... @@Bala
void send_close_connection (const TAO_GIOP_Version &version,
TAO_Transport *transport,
void *ctx);
// Close a connection, first sending GIOP::CloseConnection.
};
const size_t TAO_GIOP_HEADER_LEN = 12;
const size_t TAO_GIOP_MESSAGE_SIZE_OFFSET = 8;
const size_t TAO_GIOP_VERSION_MINOR_OFFSET = 5;
const size_t TAO_GIOP_VERSION_MAJOR_OFFSET = 4;
const size_t TAO_GIOP_MESSAGE_FLAGS_OFFSET = 6;
const size_t TAO_GIOP_MESSAGE_TYPE_OFFSET = 7;
//const size_t TAO_GIOP_MESSAGE_SIZE_OFFSET = 8;
#if defined (__ACE_INLINE__)
# include "tao/GIOP_Message_Base.i"
#endif /* __ACE_INLINE__ */
#endif /*_TAO_GIOP_MESSAGE_H_*/
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