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/*
* Copyright (C) 2000-2012 Free Software Foundation, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
#ifndef GNUTLS_RECORD_H
#define GNUTLS_RECORD_H
#include <gnutls/gnutls.h>
#include <gnutls_buffers.h>
#include <gnutls_constate.h>
ssize_t _gnutls_send_tlen_int(gnutls_session_t session,
content_type_t type,
gnutls_handshake_description_t htype,
unsigned int epoch_rel, const void *data,
size_t sizeofdata, size_t min_pad,
unsigned int mflags);
inline static ssize_t
_gnutls_send_int(gnutls_session_t session, content_type_t type,
gnutls_handshake_description_t htype,
unsigned int epoch_rel, const void *_data,
size_t data_size, unsigned int mflags)
{
return _gnutls_send_tlen_int(session, type, htype, epoch_rel,
_data, data_size, 0, mflags);
}
ssize_t _gnutls_recv_int(gnutls_session_t session, content_type_t type,
gnutls_handshake_description_t,
gnutls_packet_t *packet,
uint8_t * data,
size_t sizeofdata, void *seq, unsigned int ms);
inline static unsigned max_record_recv_size(gnutls_session_t session)
{
unsigned size;
size = MAX_CIPHER_BLOCK_SIZE /*iv*/ + MAX_PAD_SIZE + MAX_HASH_SIZE/*MAC*/;
if (gnutls_compression_get(session)!=GNUTLS_COMP_NULL || session->internals.priorities.allow_large_records != 0)
size += EXTRA_COMP_SIZE;
size += session->security_parameters.max_record_recv_size + RECORD_HEADER_SIZE(session);
return size;
}
inline static unsigned max_decrypted_size(gnutls_session_t session)
{
unsigned size = 0;
if (session->internals.priorities.allow_large_records != 0)
size += EXTRA_COMP_SIZE;
size += session->security_parameters.max_record_recv_size;
return size;
}
/* Returns the headers + any IV that the ciphersuite
* requires */
inline static
unsigned int get_total_headers(gnutls_session_t session)
{
int ret;
record_parameters_st *params;
unsigned total = RECORD_HEADER_SIZE(session);
ret = _gnutls_epoch_get(session, EPOCH_WRITE_CURRENT, ¶ms);
if (ret < 0) {
return total;
}
return total + _gnutls_cipher_get_explicit_iv_size(params->cipher);
}
inline static
unsigned int get_total_headers2(gnutls_session_t session, record_parameters_st *params)
{
unsigned total = RECORD_HEADER_SIZE(session);
return total + _gnutls_cipher_get_explicit_iv_size(params->cipher);
}
inline static void session_invalidate(gnutls_session_t session)
{
session->internals.invalid_connection = 1;
}
#endif
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