/* Copyright (C) 2010 - 2012 Sergei Golubchik and Monty Program Ab 2014 MariaDB Corporation AB This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not see or write to the Free Software Foundation, Inc., 51 Franklin St., Fifth Floor, Boston, MA 02110, USA */ /** @file MySQL Client Plugin API This file defines the API for plugins that work on the client side */ #ifndef MYSQL_CLIENT_PLUGIN_INCLUDED #define MYSQL_CLIENT_PLUGIN_INCLUDED #ifndef MYSQL_ABI_CHECK #include #include #endif #ifndef PLUGINDIR #define PLUGINDIR "lib/plugin" #endif /* known plugin types */ #define MYSQL_CLIENT_DB_PLUGIN 0 #define MYSQL_CLIENT_reserved 1 #define MYSQL_CLIENT_AUTHENTICATION_PLUGIN 2 #define MYSQL_CLIENT_AUTHENTICATION_PLUGIN_INTERFACE_VERSION 0x0100 #define MYSQL_CLIENT_DB_PLUGIN_INTERFACE_VERSION 0x0100 #define MYSQL_CLIENT_MAX_PLUGINS 3 #define mysql_declare_client_plugin(X) \ struct st_mysql_client_plugin_ ## X \ _mysql_client_plugin_declaration_ = { \ MYSQL_CLIENT_ ## X ## _PLUGIN, \ MYSQL_CLIENT_ ## X ## _PLUGIN_INTERFACE_VERSION, #define mysql_end_client_plugin } /* generic plugin header structure */ #define MYSQL_CLIENT_PLUGIN_HEADER \ int type; \ unsigned int interface_version; \ const char *name; \ const char *author; \ const char *desc; \ unsigned int version[3]; \ const char *license; \ void *mysql_api; \ int (*init)(char *, size_t, int, va_list); \ int (*deinit)(); \ int (*options)(const char *option, const void *); struct st_mysql_client_plugin { MYSQL_CLIENT_PLUGIN_HEADER }; struct st_mysql; /********* database api plugin specific declarations **********/ typedef struct st_mariadb_client_plugin_DB { MYSQL_CLIENT_PLUGIN_HEADER /* functions */ struct st_mysql_methods *methods; /* MYSQL * (*db_connect)(MYSQL *mysql,const char *host, const char *user, const char *passwd, const char *db, uint port, const char *unix_socket,unsigned long client_flag); void (*db_close)(MYSQL *mysql); int (*db_query)(MYSQL *mysql, const char *query, size_t query_len); int (*db_read_one_row)(MYSQL *mysql, uint fields, MYSQL_ROW row, ulong *lengths); MYSQL_DATA *(*db_read_all_rows)(MYSQL *mysql, MYSQL_FIELD *mysql_fields, uint fields); void (*db_query_end)(MYSQL *mysql); int (*db_stmt_prepare)(MYSQL_STMT *stmt, const char *stmt_str, ulong length); my_bool (*db_stmt_close)(MYSQL_STMT *stmt); my_bool (*is_supported_buffer_type)(enum enum_field_types type); int (*db_stmt_fetch)(MYSQL_STMT *stmt); int (*db_stmt_execute)(MYSQL_STMT *stmt); */ } MARIADB_DB_PLUGIN; #define MARIADB_DB_DRIVER(a) ((a)->ext_db) /******** authentication plugin specific declarations *********/ #include struct st_mysql_client_plugin_AUTHENTICATION { MYSQL_CLIENT_PLUGIN_HEADER int (*authenticate_user)(MYSQL_PLUGIN_VIO *vio, struct st_mysql *mysql); }; /** type of the mysql_authentication_dialog_ask function @param mysql mysql @param type type of the input 1 - ordinary string input 2 - password string @param prompt prompt @param buf a buffer to store the use input @param buf_len the length of the buffer @retval a pointer to the user input string. It may be equal to 'buf' or to 'mysql->password'. In all other cases it is assumed to be an allocated string, and the "dialog" plugin will free() it. */ typedef char *(*mysql_authentication_dialog_ask_t)(struct st_mysql *mysql, int type, const char *prompt, char *buf, int buf_len); /******** using plugins ************/ /** loads a plugin and initializes it @param mysql MYSQL structure. only MYSQL_PLUGIN_DIR option value is used, and last_errno/last_error, for error reporting @param name a name of the plugin to load @param type type of plugin that should be loaded, -1 to disable type check @param argc number of arguments to pass to the plugin initialization function @param ... arguments for the plugin initialization function @retval a pointer to the loaded plugin, or NULL in case of a failure */ struct st_mysql_client_plugin * STDCALL mysql_load_plugin(struct st_mysql *mysql, const char *name, int type, int argc, ...); /** loads a plugin and initializes it, taking va_list as an argument This is the same as mysql_load_plugin, but take va_list instead of a list of arguments. @param mysql MYSQL structure. only MYSQL_PLUGIN_DIR option value is used, and last_errno/last_error, for error reporting @param name a name of the plugin to load @param type type of plugin that should be loaded, -1 to disable type check @param argc number of arguments to pass to the plugin initialization function @param args arguments for the plugin initialization function @retval a pointer to the loaded plugin, or NULL in case of a failure */ struct st_mysql_client_plugin * STDCALL mysql_load_plugin_v(struct st_mysql *mysql, const char *name, int type, int argc, va_list args); /** finds an already loaded plugin by name, or loads it, if necessary @param mysql MYSQL structure. only MYSQL_PLUGIN_DIR option value is used, and last_errno/last_error, for error reporting @param name a name of the plugin to load @param type type of plugin that should be loaded @retval a pointer to the plugin, or NULL in case of a failure */ struct st_mysql_client_plugin * STDCALL mysql_client_find_plugin(struct st_mysql *mysql, const char *name, int type); /** adds a plugin structure to the list of loaded plugins This is useful if an application has the necessary functionality (for example, a special load data handler) statically linked into the application binary. It can use this function to register the plugin directly, avoiding the need to factor it out into a shared object. @param mysql MYSQL structure. It is only used for error reporting @param plugin an st_mysql_client_plugin structure to register @retval a pointer to the plugin, or NULL in case of a failure */ struct st_mysql_client_plugin * STDCALL mysql_client_register_plugin(struct st_mysql *mysql, struct st_mysql_client_plugin *plugin); extern struct st_mysql_client_plugin *mysql_client_builtins[]; #endif