203 lines
6.3 KiB
C
203 lines
6.3 KiB
C
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#ifndef MYSQL_CLIENT_PLUGIN_INCLUDED
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/* Copyright (c) 2010, 2016, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/**
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@file
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MySQL Client Plugin API
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This file defines the API for plugins that work on the client side
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*/
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#define MYSQL_CLIENT_PLUGIN_INCLUDED
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#ifndef MYSQL_ABI_CHECK
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#include <stdarg.h>
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#include <stdlib.h>
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#endif
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/*
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On Windows, exports from DLL need to be declared.
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Also, plugin needs to be declared as extern "C" because MSVC
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unlike other compilers, uses C++ mangling for variables not only
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for functions.
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*/
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#undef MYSQL_PLUGIN_EXPORT
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#if defined(_MSC_VER)
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#if defined(MYSQL_DYNAMIC_PLUGIN)
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#ifdef __cplusplus
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#define MYSQL_PLUGIN_EXPORT extern "C" __declspec(dllexport)
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#else
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#define MYSQL_PLUGIN_EXPORT __declspec(dllexport)
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#endif
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#else /* MYSQL_DYNAMIC_PLUGIN */
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#ifdef __cplusplus
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#define MYSQL_PLUGIN_EXPORT extern "C"
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#else
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#define MYSQL_PLUGIN_EXPORT
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#endif
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#endif /*MYSQL_DYNAMIC_PLUGIN */
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#else /*_MSC_VER */
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#define MYSQL_PLUGIN_EXPORT
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* known plugin types */
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#define MYSQL_CLIENT_reserved1 0
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#define MYSQL_CLIENT_reserved2 1
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#define MYSQL_CLIENT_AUTHENTICATION_PLUGIN 2
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#define MYSQL_CLIENT_TRACE_PLUGIN 3
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#define MYSQL_CLIENT_AUTHENTICATION_PLUGIN_INTERFACE_VERSION 0x0100
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#define MYSQL_CLIENT_TRACE_PLUGIN_INTERFACE_VERSION 0x0100
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#define MYSQL_CLIENT_MAX_PLUGINS 4
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#define mysql_declare_client_plugin(X) \
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MYSQL_PLUGIN_EXPORT struct st_mysql_client_plugin_ ## X \
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_mysql_client_plugin_declaration_ = { \
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MYSQL_CLIENT_ ## X ## _PLUGIN, \
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MYSQL_CLIENT_ ## X ## _PLUGIN_INTERFACE_VERSION,
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#define mysql_end_client_plugin }
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/* generic plugin header structure */
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#define MYSQL_CLIENT_PLUGIN_HEADER \
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int type; \
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unsigned int interface_version; \
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const char *name; \
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const char *author; \
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const char *desc; \
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unsigned int version[3]; \
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const char *license; \
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void *mysql_api; \
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int (*init)(char *, size_t, int, va_list); \
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int (*deinit)(void); \
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int (*options)(const char *option, const void *);
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struct st_mysql_client_plugin
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{
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MYSQL_CLIENT_PLUGIN_HEADER
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};
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struct st_mysql;
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/******** authentication plugin specific declarations *********/
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#include "plugin_auth_common.h"
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struct st_mysql_client_plugin_AUTHENTICATION
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{
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MYSQL_CLIENT_PLUGIN_HEADER
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int (*authenticate_user)(MYSQL_PLUGIN_VIO *vio, struct st_mysql *mysql);
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};
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/******** using plugins ************/
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/**
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loads a plugin and initializes it
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@param mysql MYSQL structure.
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@param name a name of the plugin to load
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@param type type of plugin that should be loaded, -1 to disable type check
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@param argc number of arguments to pass to the plugin initialization
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function
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@param ... arguments for the plugin initialization function
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@retval
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a pointer to the loaded plugin, or NULL in case of a failure
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*/
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struct st_mysql_client_plugin *
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mysql_load_plugin(struct st_mysql *mysql, const char *name, int type,
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int argc, ...);
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/**
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loads a plugin and initializes it, taking va_list as an argument
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This is the same as mysql_load_plugin, but take va_list instead of
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a list of arguments.
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@param mysql MYSQL structure.
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@param name a name of the plugin to load
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@param type type of plugin that should be loaded, -1 to disable type check
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@param argc number of arguments to pass to the plugin initialization
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function
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@param args arguments for the plugin initialization function
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@retval
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a pointer to the loaded plugin, or NULL in case of a failure
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*/
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struct st_mysql_client_plugin *
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mysql_load_plugin_v(struct st_mysql *mysql, const char *name, int type,
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int argc, va_list args);
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/**
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finds an already loaded plugin by name, or loads it, if necessary
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@param mysql MYSQL structure.
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@param name a name of the plugin to load
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@param type type of plugin that should be loaded
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@retval
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a pointer to the plugin, or NULL in case of a failure
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*/
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struct st_mysql_client_plugin *
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mysql_client_find_plugin(struct st_mysql *mysql, const char *name, int type);
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/**
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adds a plugin structure to the list of loaded plugins
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This is useful if an application has the necessary functionality
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(for example, a special load data handler) statically linked into
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the application binary. It can use this function to register the plugin
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directly, avoiding the need to factor it out into a shared object.
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@param mysql MYSQL structure. It is only used for error reporting
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@param plugin an st_mysql_client_plugin structure to register
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@retval
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a pointer to the plugin, or NULL in case of a failure
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*/
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struct st_mysql_client_plugin *
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mysql_client_register_plugin(struct st_mysql *mysql,
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struct st_mysql_client_plugin *plugin);
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/**
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set plugin options
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Can be used to set extra options and affect behavior for a plugin.
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This function may be called multiple times to set several options
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@param plugin an st_mysql_client_plugin structure
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@param option a string which specifies the option to set
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@param value value for the option.
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@retval 0 on success, 1 in case of failure
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**/
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int mysql_plugin_options(struct st_mysql_client_plugin *plugin,
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const char *option, const void *value);
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#ifdef __cplusplus
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}
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#endif
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#endif
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