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-rw-r--r--thirdparty/internal/dso.h164
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diff --git a/thirdparty/internal/dso.h b/thirdparty/internal/dso.h
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-/*
- * Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
-
-#ifndef OSSL_INTERNAL_DSO_H
-# define OSSL_INTERNAL_DSO_H
-# pragma once
-
-# include <openssl/crypto.h>
-# include "internal/dsoerr.h"
-
-/* These values are used as commands to DSO_ctrl() */
-# define DSO_CTRL_GET_FLAGS 1
-# define DSO_CTRL_SET_FLAGS 2
-# define DSO_CTRL_OR_FLAGS 3
-
-/*
- * By default, DSO_load() will translate the provided filename into a form
- * typical for the platform using the dso_name_converter function of the
- * method. Eg. win32 will transform "blah" into "blah.dll", and dlfcn will
- * transform it into "libblah.so". This callback could even utilise the
- * DSO_METHOD's converter too if it only wants to override behaviour for
- * one or two possible DSO methods. However, the following flag can be
- * set in a DSO to prevent *any* native name-translation at all - eg. if
- * the caller has prompted the user for a path to a driver library so the
- * filename should be interpreted as-is.
- */
-# define DSO_FLAG_NO_NAME_TRANSLATION 0x01
-/*
- * An extra flag to give if only the extension should be added as
- * translation. This is obviously only of importance on Unix and other
- * operating systems where the translation also may prefix the name with
- * something, like 'lib', and ignored everywhere else. This flag is also
- * ignored if DSO_FLAG_NO_NAME_TRANSLATION is used at the same time.
- */
-# define DSO_FLAG_NAME_TRANSLATION_EXT_ONLY 0x02
-
-/*
- * Don't unload the DSO when we call DSO_free()
- */
-# define DSO_FLAG_NO_UNLOAD_ON_FREE 0x04
-
-/*
- * This flag loads the library with public symbols. Meaning: The exported
- * symbols of this library are public to all libraries loaded after this
- * library. At the moment only implemented in unix.
- */
-# define DSO_FLAG_GLOBAL_SYMBOLS 0x20
-
-typedef void (*DSO_FUNC_TYPE) (void);
-
-typedef struct dso_st DSO;
-typedef struct dso_meth_st DSO_METHOD;
-
-/*
- * The function prototype used for method functions (or caller-provided
- * callbacks) that transform filenames. They are passed a DSO structure
- * pointer (or NULL if they are to be used independently of a DSO object) and
- * a filename to transform. They should either return NULL (if there is an
- * error condition) or a newly allocated string containing the transformed
- * form that the caller will need to free with OPENSSL_free() when done.
- */
-typedef char *(*DSO_NAME_CONVERTER_FUNC)(DSO *, const char *);
-/*
- * The function prototype used for method functions (or caller-provided
- * callbacks) that merge two file specifications. They are passed a DSO
- * structure pointer (or NULL if they are to be used independently of a DSO
- * object) and two file specifications to merge. They should either return
- * NULL (if there is an error condition) or a newly allocated string
- * containing the result of merging that the caller will need to free with
- * OPENSSL_free() when done. Here, merging means that bits and pieces are
- * taken from each of the file specifications and added together in whatever
- * fashion that is sensible for the DSO method in question. The only rule
- * that really applies is that if the two specification contain pieces of the
- * same type, the copy from the first string takes priority. One could see
- * it as the first specification is the one given by the user and the second
- * being a bunch of defaults to add on if they're missing in the first.
- */
-typedef char *(*DSO_MERGER_FUNC)(DSO *, const char *, const char *);
-
-DSO *DSO_new(void);
-int DSO_free(DSO *dso);
-int DSO_flags(DSO *dso);
-int DSO_up_ref(DSO *dso);
-long DSO_ctrl(DSO *dso, int cmd, long larg, void *parg);
-
-/*
- * These functions can be used to get/set the platform-independent filename
- * used for a DSO. NB: set will fail if the DSO is already loaded.
- */
-const char *DSO_get_filename(DSO *dso);
-int DSO_set_filename(DSO *dso, const char *filename);
-/*
- * This function will invoke the DSO's name_converter callback to translate a
- * filename, or if the callback isn't set it will instead use the DSO_METHOD's
- * converter. If "filename" is NULL, the "filename" in the DSO itself will be
- * used. If the DSO_FLAG_NO_NAME_TRANSLATION flag is set, then the filename is
- * simply duplicated. NB: This function is usually called from within a
- * DSO_METHOD during the processing of a DSO_load() call, and is exposed so
- * that caller-created DSO_METHODs can do the same thing. A non-NULL return
- * value will need to be OPENSSL_free()'d.
- */
-char *DSO_convert_filename(DSO *dso, const char *filename);
-/*
- * This function will invoke the DSO's merger callback to merge two file
- * specifications, or if the callback isn't set it will instead use the
- * DSO_METHOD's merger. A non-NULL return value will need to be
- * OPENSSL_free()'d.
- */
-char *DSO_merge(DSO *dso, const char *filespec1, const char *filespec2);
-
-/*
- * The all-singing all-dancing load function, you normally pass NULL for the
- * first and third parameters. Use DSO_up_ref and DSO_free for subsequent
- * reference count handling. Any flags passed in will be set in the
- * constructed DSO after its init() function but before the load operation.
- * If 'dso' is non-NULL, 'flags' is ignored.
- */
-DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags);
-
-/* This function binds to a function inside a shared library. */
-DSO_FUNC_TYPE DSO_bind_func(DSO *dso, const 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 function writes null-terminated pathname of DSO module containing
- * 'addr' into 'sz' large caller-provided 'path' and returns the number of
- * characters [including trailing zero] written to it. If 'sz' is 0 or
- * negative, 'path' is ignored and required amount of characters [including
- * trailing zero] to accommodate pathname is returned. If 'addr' is NULL, then
- * pathname of cryptolib itself is returned. Negative or zero return value
- * denotes error.
- */
-int DSO_pathbyaddr(void *addr, char *path, int sz);
-
-/*
- * Like DSO_pathbyaddr() but instead returns a handle to the DSO for the symbol
- * or NULL on error.
- */
-DSO *DSO_dsobyaddr(void *addr, int flags);
-
-/*
- * This function should be used with caution! It looks up symbols in *all*
- * loaded modules and if module gets unloaded by somebody else attempt to
- * dereference the pointer is doomed to have fatal consequences. Primary
- * usage for this function is to probe *core* system functionality, e.g.
- * check if getnameinfo(3) is available at run-time without bothering about
- * OS-specific details such as libc.so.versioning or where does it actually
- * reside: in libc itself or libsocket.
- */
-void *DSO_global_lookup(const char *name);
-
-#endif