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// $Id$
#include "tao/GIOP_Message_State.h"
#include "tao/debug.h"
#include "tao/GIOP_Message_Base.h"
#include "ace/Log_Msg.h"
#if !defined (__ACE_INLINE__)
# include "tao/GIOP_Message_State.inl"
#endif /* __ACE_INLINE__ */
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
int
TAO_GIOP_Message_State::parse_message_header (ACE_Message_Block &incoming)
{
if (incoming.length () >= TAO_GIOP_MESSAGE_HEADER_LEN)
{
// Parse the GIOP header
return this->parse_message_header_i (incoming);
}
// One indicates that we didn't have enough data in the message to
// parse the header
return 1;
}
int
TAO_GIOP_Message_State::parse_message_header_i (ACE_Message_Block &incoming)
{
if (TAO_debug_level > 8)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - GIOP_Message_State::parse_message_header_i\n")
));
}
char * const buf = incoming.rd_ptr ();
if (this->parse_magic_bytes (buf) == -1 // Parse magic bytes first
|| this->get_version_info (buf) == -1 // Get version information
|| this->get_byte_order_info (buf) == -1) // Get byte order information
{
return -1;
}
// Get the message type
this->message_type_ =
static_cast <GIOP::MsgType> (buf[TAO_GIOP_MESSAGE_TYPE_OFFSET]);
// Get the size of the message..
this->get_payload_size (buf);
if (this->payload_size_ == 0)
{
switch (this->message_type_)
{
case GIOP::MessageError:
case GIOP::CloseConnection:
if (TAO_debug_level > 0)
{
char const * const which =
(this->message_type_ == GIOP::CloseConnection) ? "CloseConnection" :
(this->message_type_ == GIOP::MessageError) ? "MessageError" : "unknown";
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - GIOP %C received\n"), which));
}
return 0;
default:
if (TAO_debug_level > 0)
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - ")
ACE_TEXT ("TAO_GIOP_Message_State::parse_magic_bytes, ")
ACE_TEXT ("Message of size zero recd.\n")));
return -1;
}
}
return 0; // success
}
int
TAO_GIOP_Message_State::parse_magic_bytes (char *buf)
{
if (!((buf [0] == 0x5A || buf [0] == 0x47) // 'Z' or 'G' (depending on compression)
&& buf [1] == 0x49 // 'I'
&& buf [2] == 0x4f // 'O'
&& buf [3] == 0x50)) // 'P'
{
if (TAO_debug_level > 0)
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - ")
ACE_TEXT ("TAO_GIOP_Message_State::parse_magic_bytes, ")
ACE_TEXT ("bad %cIOP header: ")
ACE_TEXT ("magic word [%02x,%02x,%02x,%02x]\n"),
buf[0],
buf[0],
buf[1],
buf[2],
buf[3]));
return -1;
}
return 0;
}
int
TAO_GIOP_Message_State::get_version_info (char *buf)
{
if (TAO_debug_level > 8)
{
ACE_DEBUG ((LM_DEBUG,
"TAO (%P|%t) - GIOP_Message_State::get_version_info\n"));
}
// We have a GIOP message on hand. Get its revision numbers
CORBA::Octet incoming_major = buf[TAO_GIOP_VERSION_MAJOR_OFFSET];
CORBA::Octet incoming_minor = buf[TAO_GIOP_VERSION_MINOR_OFFSET];
// Check the revision information
if (TAO_GIOP_Message_Generator_Parser_Impl::check_revision (
incoming_major,
incoming_minor) == 0)
{
if (TAO_debug_level > 0)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - bad version <%d.%d>\n"),
incoming_major, incoming_minor));
}
return -1;
}
// Set the version
this->giop_version_.minor = incoming_minor;
this->giop_version_.major = incoming_major;
return 0;
}
int
TAO_GIOP_Message_State::get_byte_order_info (char *buf)
{
if (TAO_debug_level > 8)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - GIOP_Message_State::get_byte_order_info\n") ));
}
// Let us be specific that this is for 1.0
if (this->giop_version_.minor == 0 && this->giop_version_.major == 1)
{
this->byte_order_ =
buf[TAO_GIOP_MESSAGE_FLAGS_OFFSET];
if (this->byte_order_ != 0 && this->byte_order_ != 1)
{
if (TAO_debug_level > 2)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - GIOP_Message_State::get_byte_order_info, ")
ACE_TEXT ("invalid byte order <%d> for version <1.0>\n"),
this->byte_order_));
}
return -1;
}
}
else
{
// Read the byte ORDER
this->byte_order_ =
(CORBA::Octet) (buf[TAO_GIOP_MESSAGE_FLAGS_OFFSET]& 0x01);
// Read the fragment bit
this->more_fragments_ =
((buf[TAO_GIOP_MESSAGE_FLAGS_OFFSET]& 0x02) == 2);
this->compressed_ = (buf[0] == 0x5A);
}
return 0;
}
void
TAO_GIOP_Message_State::get_payload_size (char *rd_ptr)
{
// Move the read pointer
rd_ptr += TAO_GIOP_MESSAGE_SIZE_OFFSET;
this->payload_size_ = this->read_ulong (rd_ptr);
}
CORBA::ULong
TAO_GIOP_Message_State::read_ulong (const char *rd_ptr) const
{
CORBA::ULong x = 0;
// We don't need to do this sort of copy. But some compilers (read it
// as SunCC) have a problem in deferencing from the
// reinterpret_cast pointer of the <rd_ptr>, as the <rd_ptr> can be
// on stack. So let us go ahead with this copying...
char buf[] =
{
*rd_ptr,
*(rd_ptr + 1),
*(rd_ptr + 2),
*(rd_ptr + 3)
};
#if !defined (ACE_DISABLE_SWAP_ON_READ)
if (!(this->byte_order_ != ACE_CDR_BYTE_ORDER))
{
ACE_CDR::ULong* pul = reinterpret_cast<ACE_CDR::ULong*> (buf);
x = *pul;
}
else
{
ACE_CDR::swap_4 (buf, reinterpret_cast<char*> (&x));
}
#else
x = *reinterpret_cast<ACE_CDR::ULong*> (buf);
#endif /* ACE_DISABLE_SWAP_ON_READ */
return x;
}
TAO_END_VERSIONED_NAMESPACE_DECL
|
