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/*
* Copyright (C) 2001, 2004, 2005, 2007, 2008, 2009 Free Software Foundation
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GNUTLS-EXTRA.
*
* GNUTLS-EXTRA is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* GNUTLS-EXTRA 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <gnutls_extensions.h>
#include <gnutls_algorithms.h>
#include <ext_inner_application.h>
#ifdef USE_LZO
# ifdef USE_MINILZO
# include "minilzo/minilzo.h"
# elif HAVE_LZO_LZO1X_H
# include <lzo/lzo1x.h>
# elif HAVE_LZO1X_H
# include <lzo1x.h>
# endif
#endif
#include <gnutls/extra.h>
#ifdef USE_LZO
#include <gnutls_compress.h>
/* the number of the compression algorithms available in the compression
* structure.
*/
extern int _gnutls_comp_algorithms_size;
typedef int (*LZO_FUNC) ();
extern LZO_FUNC _gnutls_lzo1x_decompress_safe;
extern LZO_FUNC _gnutls_lzo1x_1_compress;
extern gnutls_compression_entry _gnutls_compression_algorithms[];
static int
_gnutls_add_lzo_comp (void)
{
int i;
/* find the last element */
for (i = 0; i < _gnutls_comp_algorithms_size; i++)
{
if (_gnutls_compression_algorithms[i].name == NULL)
break;
}
if (_gnutls_compression_algorithms[i].name == NULL
&& (i < _gnutls_comp_algorithms_size - 1))
{
_gnutls_compression_algorithms[i].name = "GNUTLS_COMP_LZO";
_gnutls_compression_algorithms[i].id = GNUTLS_COMP_LZO;
_gnutls_compression_algorithms[i].num = 0xf2;
_gnutls_compression_algorithms[i + 1].name = 0;
/* Now enable the lzo functions: */
_gnutls_lzo1x_decompress_safe = lzo1x_decompress_safe;
_gnutls_lzo1x_1_compress = lzo1x_1_compress;
return 0; /* ok */
}
return GNUTLS_E_MEMORY_ERROR;
}
#endif
static int _gnutls_init_extra = 0;
/**
* gnutls_global_init_extra - initializes the global state of gnutls-extra
*
* This function initializes the global state of gnutls-extra library
* to defaults.
*
* Note that gnutls_global_init() has to be called before this
* function. If this function is not called then the gnutls-extra
* library will not be usable.
*
* This function is not thread safe, see the discussion for
* gnutls_global_init() on how to deal with that.
*
* Returns: On success, %GNUTLS_E_SUCCESS (zero) is returned,
* otherwise an error code is returned.
**/
int
gnutls_global_init_extra (void)
{
int ret;
/* If the version of libgnutls != version of
* libextra, then do not initialize the library.
* This is because it may break things.
*/
if (strcmp (gnutls_check_version (NULL), VERSION) != 0)
{
return GNUTLS_E_LIBRARY_VERSION_MISMATCH;
}
_gnutls_init_extra++;
if (_gnutls_init_extra != 1)
return 0;
ret = gnutls_ext_register (GNUTLS_EXTENSION_INNER_APPLICATION,
"INNER_APPLICATION",
GNUTLS_EXT_TLS,
_gnutls_inner_application_recv_params,
_gnutls_inner_application_send_params);
if (ret != GNUTLS_E_SUCCESS)
return ret;
/* Initialize the LZO library
*/
#ifdef USE_LZO
if (lzo_init () != LZO_E_OK)
return GNUTLS_E_LZO_INIT_FAILED;
/* Add the LZO compression method in the list of compression
* methods.
*/
ret = _gnutls_add_lzo_comp ();
if (ret < 0)
{
gnutls_assert ();
return ret;
}
#endif
return 0;
}
/**
* gnutls_extra_check_version - checks the libgnutls-extra version
* @req_version: version string to compare with, or %NULL.
*
* Check GnuTLS Extra Library version.
*
* See %LIBGNUTLS_EXTRA_VERSION for a suitable @req_version string.
*
* Return value: Check that the version of the library is at
* minimum the one given as a string in @req_version and return the
* actual version string of the library; return %NULL if the
* condition is not met. If %NULL is passed to this function no
* check is done and only the version string is returned.
**/
const char *
gnutls_extra_check_version (const char *req_version)
{
if (!req_version || strverscmp (req_version, VERSION) <= 0)
return VERSION;
return NULL;
}
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