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/* dso.h */
/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
* project 2000.
*/
/* ====================================================================
* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#ifndef HEADER_DSO_H
#define HEADER_DSO_H
#include <openssl/crypto.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct dso_st DSO;
typedef struct dso_meth_st
{
const char *name;
/* Loads a shared library */
int (*dso_load)(DSO *dso, char *filename);
/* Unloads a shared library */
int (*dso_unload)(DSO *dso);
/* Binds a function, variable, or whatever */
int (*dso_bind)(DSO *dso, char *symname, void **symptr);
/* I don't think this would actually be used in any circumstances. */
#if 0
/* Unbinds a symbol */
int (*dso_unbind)(DSO *dso, char *symname, void *symptr);
#endif
int (*init)(DSO *dso);
int (*finish)(DSO *dso);
} DSO_METHOD;
/**********************************************************************/
/* The low-level handle type used to refer to a loaded shared library */
struct dso_st
{
DSO_METHOD *meth;
/* Standard dlopen uses a (void *). Win32 uses a HANDLE. VMS
* doesn't use anything but will need to cache the filename
* for use in the dso_bind handler. All in all, let each
* method control its own destiny. "Handles" and such go in
* a STACK. */
STACK *meth_data;
int references;
int flags;
/* For use by applications etc ... use this for your bits'n'pieces,
* don't touch meth_data! */
CRYPTO_EX_DATA ex_data;
};
DSO * DSO_new(void);
DSO * DSO_new_method(DSO_METHOD *method);
int DSO_free(DSO *dso);
int DSO_flags(DSO *dso);
int DSO_up(DSO *dso);
void DSO_set_default_method(DSO_METHOD *meth);
DSO_METHOD *DSO_get_default_method(void);
DSO_METHOD *DSO_get_method(DSO *dso);
DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth);
/* The all-singing all-dancing load function, you normally pass NULL
* for the last two parameters. Use DSO_up and DSO_free for reference
* count handling. */
DSO *DSO_load(DSO *dso, char *filename, DSO_METHOD *meth);
/* This function binds to a function, variable, whatever inside a
* shared library. */
void *DSO_bind(DSO *dso, char *symname);
/* This method is the default, but will beg, borrow, or steal whatever
* method should be the default on any particular platform (including
* DSO_METH_null() if necessary). */
DSO_METHOD *DSO_METHOD_openssl(void);
/* This method is defined for all platforms - if a platform has no
* DSO support then this will be the only method! */
DSO_METHOD *DSO_METHOD_null(void);
/* If DSO_DLFCN is defined, the standard dlfcn.h-style functions
* (dlopen, dlclose, dlsym, etc) will be used and incorporated into
* this method. If not, this method will return NULL. */
DSO_METHOD *DSO_METHOD_dlfcn(void);
/* If DSO_DL is defined, the standard dl.h-style functions (shl_load,
* shl_unload, shl_findsym, etc) will be used and incorporated into
* this method. If not, this method will return NULL. */
DSO_METHOD *DSO_METHOD_dl(void);
/* If WIN32 is defined, use DLLs. If not, return NULL. */
DSO_METHOD *DSO_METHOD_win32(void);
void ERR_load_DSO_strings(void);
/* BEGIN ERROR CODES */
/* The following lines are auto generated by the script mkerr.pl. Any changes
* made after this point may be overwritten when the script is next run.
*/
/* Error codes for the DSO functions. */
/* Function codes. */
#define DSO_F_DLFCN_BIND 100
#define DSO_F_DLFCN_LOAD 101
#define DSO_F_DLFCN_UNLOAD 102
#define DSO_F_DL_BIND 103
#define DSO_F_DL_LOAD 104
#define DSO_F_DL_UNLOAD 105
#define DSO_F_DSO_BIND 106
#define DSO_F_DSO_FREE 107
#define DSO_F_DSO_LOAD 108
#define DSO_F_DSO_NEW_METHOD 109
#define DSO_F_DSO_UP 110
#define DSO_F_WIN32_BIND 111
#define DSO_F_WIN32_LOAD 112
#define DSO_F_WIN32_UNLOAD 113
/* Reason codes. */
#define DSO_R_FINISH_FAILED 100
#define DSO_R_LOAD_FAILED 101
#define DSO_R_NULL_HANDLE 102
#define DSO_R_STACK_ERROR 103
#define DSO_R_SYM_FAILURE 104
#define DSO_R_UNLOAD_FAILED 105
#define DSO_R_UNSUPPORTED 106
#ifdef __cplusplus
}
#endif
#endif
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