/* Buffer for handshake packets. Keeps the packets in order
* for finished messages to use them. Used in HMAC calculation
* and finished messages.
*/
int
_gnutls_handshake_buffer_put (gnutls_session_t session, opaque * data,
size_t length)
{
if (length == 0)
return 0;
if ((session->internals.max_handshake_data_buffer_size > 0) &&
((length + session->internals.handshake_hash_buffer.length) >
session->internals.max_handshake_data_buffer_size))
{
gnutls_assert ();
return GNUTLS_E_MEMORY_ERROR;
}
_gnutls_buffers_log ("BUF[HSK]: Inserted %d bytes of Data\n", length);
if (_gnutls_buffer_append (&session->internals.handshake_hash_buffer,
data, length) < 0)
{
gnutls_assert ();
return GNUTLS_E_MEMORY_ERROR;
}
return 0;
}
/* Buffers received packets of type APPLICATION DATA and
* HANDSHAKE DATA.
*/
int
_gnutls_record_buffer_put (content_type_t type,
gnutls_session_t session, opaque * data,
size_t length)
{
gnutls_buffer *buf;
if (length == 0)
return 0;
switch (type)
{
case GNUTLS_APPLICATION_DATA:
buf = &session->internals.application_data_buffer;
_gnutls_buffers_log ("BUF[REC]: Inserted %d bytes of Data(%d)\n",
length, type);
break;
case GNUTLS_HANDSHAKE:
buf = &session->internals.handshake_data_buffer;
_gnutls_buffers_log ("BUF[HSK]: Inserted %d bytes of Data(%d)\n",
length, type);
break;
case GNUTLS_INNER_APPLICATION:
buf = &session->internals.ia_data_buffer;
_gnutls_buffers_log ("BUF[IA]: Inserted %d bytes of Data(%d)\n",
length, type);
break;
default:
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
if (_gnutls_buffer_append (buf, data, length) < 0)
{
gnutls_assert ();
return GNUTLS_E_MEMORY_ERROR;
}
return 0;
}
int
_gnutls_handshake_buffer_clear (gnutls_session_t session)
{
_gnutls_buffers_log ("BUF[HSK]: Cleared Data from buffer\n");
_gnutls_buffer_clear (&session->internals.handshake_hash_buffer);
return 0;
}
/* Does not free the buffer
*/
int
_gnutls_handshake_buffer_empty (gnutls_session_t session)
{
_gnutls_buffers_log ("BUF[HSK]: Emptied buffer\n");
session->internals.handshake_hash_buffer.length = 0;
return 0;
}
int
_gnutls_record_buffer_get (content_type_t type,
gnutls_session_t session, opaque * data,
size_t length)
{
if (length == 0 || data == NULL)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
switch (type)
{
case GNUTLS_APPLICATION_DATA:
_gnutls_buffer_get_data( &session->internals.application_data_buffer, data, &length);
_gnutls_buffers_log ("BUFFER[REC][AD]: Read %d bytes of Data(%d)\n",
length, type);
break;
case GNUTLS_HANDSHAKE:
_gnutls_buffer_get_data( &session->internals.handshake_data_buffer, data, &length);
_gnutls_buffers_log ("BUF[REC][HD]: Read %d bytes of Data(%d)\n",
length, type);
break;
case GNUTLS_INNER_APPLICATION:
_gnutls_buffer_get_data( &session->internals.ia_data_buffer, data, &length);
_gnutls_buffers_log ("BUF[REC][IA]: Read %d bytes of Data(%d)\n",
length, type);
break;
default:
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
return length;
}
/* this function does not touch the buffer
* and returns data from it (peek mode!)
*/
int
_gnutls_handshake_buffer_get_ptr (gnutls_session_t session,
opaque ** data_ptr, size_t * length)
{
if (length != NULL)
*length = session->internals.handshake_hash_buffer.length;
_gnutls_buffers_log ("BUF[HSK]: Peeked %d bytes of Data\n", *length);
if (data_ptr != NULL)
*data_ptr = session->internals.handshake_hash_buffer.data;
return 0;
}
/* this function does not touch the buffer
* and returns data from it (peek mode!)
*/
int
_gnutls_handshake_buffer_peek (gnutls_session_t session, opaque * data,
size_t length)
{
if (length > session->internals.handshake_hash_buffer.length)
{
length = session->internals.handshake_hash_buffer.length;
}
_gnutls_buffers_log ("BUF[HSK]: Peeked %d bytes of Data\n", length);
memcpy (data, session->internals.handshake_hash_buffer.data, length);
return length;
}
/* Buffers received packets of type APPLICATION DATA and
* HANDSHAKE DATA.
*/
int
_gnutls_record_buffer_put (gnutls_session_t session,
content_type_t type, uint64* seq, mbuffer_st* bufel)
{
bufel->type = type;
memcpy(&bufel->record_sequence, seq, sizeof(*seq));
_mbuffer_enqueue(&session->internals.record_buffer, bufel);
_gnutls_buffers_log ("BUF[REC]: Inserted %d bytes of Data(%d)\n",
(int) bufel->msg.size, (int) type);
return 0;
}
int
_gnutls_record_buffer_get (content_type_t type,
gnutls_session_t session, opaque * data,
size_t length)
{
if (length == 0 || data == NULL)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
switch (type)
{
case GNUTLS_APPLICATION_DATA:
if (length > session->internals.application_data_buffer.length)
{
length = session->internals.application_data_buffer.length;
}
_gnutls_buffers_log ("BUFFER[REC][AD]: Read %d bytes of Data(%d)\n",
length, type);
session->internals.application_data_buffer.length -= length;
memcpy (data, session->internals.application_data_buffer.data, length);
/* overwrite buffer */
memmove (session->internals.application_data_buffer.data,
&session->internals.application_data_buffer.data[length],
session->internals.application_data_buffer.length);
/* we do no longer realloc the application_data_buffer.data,
* since it serves no practical reason. It also decreases
* performance.
*/
break;
case GNUTLS_HANDSHAKE:
if (length > session->internals.handshake_data_buffer.length)
{
length = session->internals.handshake_data_buffer.length;
}
_gnutls_buffers_log ("BUF[REC][HD]: Read %d bytes of Data(%d)\n",
length, type);
session->internals.handshake_data_buffer.length -= length;
memcpy (data, session->internals.handshake_data_buffer.data, length);
/* overwrite buffer */
memmove (session->internals.handshake_data_buffer.data,
&session->internals.handshake_data_buffer.data[length],
session->internals.handshake_data_buffer.length);
break;
case GNUTLS_INNER_APPLICATION:
if (length > session->internals.ia_data_buffer.length)
length = session->internals.ia_data_buffer.length;
_gnutls_buffers_log ("BUF[REC][IA]: Read %d bytes of Data(%d)\n",
length, type);
session->internals.ia_data_buffer.length -= length;
memcpy (data, session->internals.ia_data_buffer.data, length);
/* overwrite buffer */
memmove (session->internals.ia_data_buffer.data,
&session->internals.ia_data_buffer.data[length],
session->internals.ia_data_buffer.length);
break;
default:
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
return length;
}