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207 lines
7.5 KiB
C
207 lines
7.5 KiB
C
/* Copyright (C) 2010 - 2012 Sergei Golubchik and Monty Program Ab
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2014 MariaDB Corporation AB
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not see <http://www.gnu.org/licenses>
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or write to the Free Software Foundation, Inc.,
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51 Franklin St., Fifth Floor, Boston, MA 02110, 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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#ifndef MYSQL_CLIENT_PLUGIN_INCLUDED
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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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#ifndef PLUGINDIR
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#define PLUGINDIR "lib/plugin"
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#endif
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/* known plugin types */
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#define MYSQL_CLIENT_DB_PLUGIN 0
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#define MYSQL_CLIENT_reserved 1
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#define MYSQL_CLIENT_AUTHENTICATION_PLUGIN 2
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#define MYSQL_CLIENT_AUTHENTICATION_PLUGIN_INTERFACE_VERSION 0x0100
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#define MYSQL_CLIENT_DB_PLUGIN_INTERFACE_VERSION 0x0100
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#define MYSQL_CLIENT_MAX_PLUGINS 3
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#define mysql_declare_client_plugin(X) \
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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)(); \
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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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/********* database api plugin specific declarations **********/
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typedef struct st_mariadb_client_plugin_DB
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{
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MYSQL_CLIENT_PLUGIN_HEADER
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/* functions */
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struct st_mysql_methods *methods;
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/*
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MYSQL * (*db_connect)(MYSQL *mysql,const char *host, const char *user,
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const char *passwd, const char *db, uint port,
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const char *unix_socket,unsigned long client_flag);
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void (*db_close)(MYSQL *mysql);
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int (*db_query)(MYSQL *mysql, const char *query, size_t query_len);
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int (*db_read_one_row)(MYSQL *mysql, uint fields, MYSQL_ROW row,
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ulong *lengths);
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MYSQL_DATA *(*db_read_all_rows)(MYSQL *mysql,
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MYSQL_FIELD *mysql_fields, uint fields);
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void (*db_query_end)(MYSQL *mysql);
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int (*db_stmt_prepare)(MYSQL_STMT *stmt, const char *stmt_str, ulong length);
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my_bool (*db_stmt_close)(MYSQL_STMT *stmt);
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my_bool (*is_supported_buffer_type)(enum enum_field_types type);
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int (*db_stmt_fetch)(MYSQL_STMT *stmt);
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int (*db_stmt_execute)(MYSQL_STMT *stmt); */
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} MARIADB_DB_PLUGIN;
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#define MARIADB_DB_DRIVER(a) ((a)->ext_db)
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/******** authentication plugin specific declarations *********/
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#include <mysql/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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/**
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type of the mysql_authentication_dialog_ask function
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@param mysql mysql
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@param type type of the input
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1 - ordinary string input
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2 - password string
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@param prompt prompt
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@param buf a buffer to store the use input
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@param buf_len the length of the buffer
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@retval a pointer to the user input string.
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It may be equal to 'buf' or to 'mysql->password'.
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In all other cases it is assumed to be an allocated
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string, and the "dialog" plugin will free() it.
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*/
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typedef char *(*mysql_authentication_dialog_ask_t)(struct st_mysql *mysql,
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int type, const char *prompt, char *buf, int buf_len);
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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. only MYSQL_PLUGIN_DIR option value is used,
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and last_errno/last_error, for error reporting
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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 * STDCALL
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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. only MYSQL_PLUGIN_DIR option value is used,
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and last_errno/last_error, for error reporting
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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 * STDCALL
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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. only MYSQL_PLUGIN_DIR option value is used,
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and last_errno/last_error, for error reporting
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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 * STDCALL
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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 * STDCALL
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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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extern struct st_mysql_client_plugin *mysql_client_builtins[];
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#endif
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