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Current File : /usr/include/mysql/sql_common.h
#ifndef SQL_COMMON_INCLUDED
#define SQL_COMMON_INCLUDED

/* Copyright (c) 2003, 2023, Oracle and/or its affiliates.
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program 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 General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#define SQL_COMMON_INCLUDED

#ifdef	__cplusplus
extern "C" {
#endif

#include <mysql.h>
#include <hash.h>

extern const char	*unknown_sqlstate;
extern const char	*cant_connect_sqlstate;
extern const char	*not_error_sqlstate;


/*
  Free all memory allocated in MYSQL handle except the
  current options.
*/
void mysql_close_free(MYSQL *mysql);

/*
  Clear connection options stored in MYSQL handle and
  free memory used by them.
*/
void mysql_close_free_options(MYSQL *mysql);


/**
  The structure is used to hold the state change information
  received from the server. LIST functions are used for manipulation
  of the members of the structure.
*/
typedef struct st_session_track_info_node {
  /** head_node->data is a LEX_STRING which contains the variable name. */
  LIST *head_node;
  LIST *current_node;
} STATE_INFO_NODE;

/**
  Store the change info received from the server in an array of linked lists
  with STATE_INFO_NODE elements (one per state type).
*/
typedef struct st_session_track_info {
  /** Array of STATE_NODE_INFO elements (one per state type). */
  struct st_session_track_info_node info_list[SESSION_TRACK_END + 1];
} STATE_INFO;

/*
  Access to MYSQL::extension member.

  Note: functions mysql_extension_{init,free}() are defined
  in client.c.
*/

struct st_mysql_trace_info;

typedef struct st_mysql_extension {
  struct st_mysql_trace_info *trace_data;
  struct st_session_track_info state_change;
} MYSQL_EXTENSION;

/* "Constructor/destructor" for MYSQL extension structure. */
struct st_mysql_extension* mysql_extension_init(struct st_mysql*);
void mysql_extension_free(struct st_mysql_extension*);

/*
  Note: Allocated extension structure is freed in mysql_close_free()
  called by mysql_close().
*/
#define MYSQL_EXTENSION_PTR(H)                                    \
(                                                                 \
 (struct st_mysql_extension*)                                     \
 ( (H)->extension ?                                               \
   (H)->extension : ((H)->extension= mysql_extension_init(H))     \
 )                                                                \
)


struct st_mysql_options_extention {
  char *plugin_dir;
  char *default_auth;
  char *ssl_crl;				/* PEM CRL file */
  char *ssl_crlpath;				/* PEM directory of CRL-s? */
  HASH connection_attributes;
  char *server_public_key_path;
  size_t connection_attributes_length;
  my_bool enable_cleartext_plugin;
  my_bool get_server_public_key;
  char *tls_version; /* TLS version option */
  long ssl_ctx_flags; /* SSL ctx options flag */
  unsigned int ssl_mode;
};

typedef struct st_mysql_methods
{
  my_bool (*read_query_result)(MYSQL *mysql);
  my_bool (*advanced_command)(MYSQL *mysql,
			      enum enum_server_command command,
			      const unsigned char *header,
			      size_t header_length,
			      const unsigned char *arg,
			      size_t arg_length,
			      my_bool skip_check,
                              MYSQL_STMT *stmt);
  MYSQL_DATA *(*read_rows)(MYSQL *mysql,MYSQL_FIELD *mysql_fields,
			   unsigned int fields);
  MYSQL_RES * (*use_result)(MYSQL *mysql);
  void (*fetch_lengths)(unsigned long *to, 
			MYSQL_ROW column, unsigned int field_count);
  void (*flush_use_result)(MYSQL *mysql, my_bool flush_all_results);
  int (*read_change_user_result)(MYSQL *mysql);
#if !defined(MYSQL_SERVER) || defined(EMBEDDED_LIBRARY)
  MYSQL_FIELD * (*list_fields)(MYSQL *mysql);
  my_bool (*read_prepare_result)(MYSQL *mysql, MYSQL_STMT *stmt);
  int (*stmt_execute)(MYSQL_STMT *stmt);
  int (*read_binary_rows)(MYSQL_STMT *stmt);
  int (*unbuffered_fetch)(MYSQL *mysql, char **row);
  void (*free_embedded_thd)(MYSQL *mysql);
  const char *(*read_statistics)(MYSQL *mysql);
  my_bool (*next_result)(MYSQL *mysql);
  int (*read_rows_from_cursor)(MYSQL_STMT *stmt);
  void (*free_rows)(MYSQL_DATA *cur);
#endif
} MYSQL_METHODS;

#define simple_command(mysql, command, arg, length, skip_check) \
  ((mysql)->methods \
    ? (*(mysql)->methods->advanced_command)(mysql, command, 0, \
                                            0, arg, length, skip_check, NULL) \
    : (set_mysql_error(mysql, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate), 1))
#define stmt_command(mysql, command, arg, length, stmt) \
  ((mysql)->methods \
    ? (*(mysql)->methods->advanced_command)(mysql, command, 0,  \
                                           0, arg, length, 1, stmt) \
    : (set_mysql_error(mysql, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate), 1))

extern CHARSET_INFO *default_client_charset_info;
MYSQL_FIELD *unpack_fields(MYSQL *mysql, MYSQL_ROWS *data,MEM_ROOT *alloc,
                           uint fields, my_bool default_value,
                           uint server_capabilities);
MYSQL_FIELD * cli_read_metadata_ex(MYSQL *mysql, MEM_ROOT *alloc,
                                   unsigned long field_count,
                                   unsigned int fields);
MYSQL_FIELD * cli_read_metadata(MYSQL *mysql, unsigned long field_count,
                               unsigned int fields);
void free_rows(MYSQL_DATA *cur);
void free_old_query(MYSQL *mysql);
void end_server(MYSQL *mysql);
my_bool mysql_reconnect(MYSQL *mysql);
void mysql_read_default_options(struct st_mysql_options *options,
				const char *filename,const char *group);
my_bool
cli_advanced_command(MYSQL *mysql, enum enum_server_command command,
		     const unsigned char *header, size_t header_length,
		     const unsigned char *arg, size_t arg_length,
                     my_bool skip_check, MYSQL_STMT *stmt);
unsigned long cli_safe_read(MYSQL *mysql, my_bool *is_data_packet);
unsigned long cli_safe_read_with_ok(MYSQL *mysql, my_bool parse_ok,
                                    my_bool *is_data_packet);
void net_clear_error(NET *net);
void set_stmt_errmsg(MYSQL_STMT *stmt, NET *net);
void set_stmt_error(MYSQL_STMT *stmt, int errcode, const char *sqlstate,
                    const char *err);
void set_mysql_error(MYSQL *mysql, int errcode, const char *sqlstate);
void set_mysql_extended_error(MYSQL *mysql, int errcode, const char *sqlstate,
                              const char *format, ...);
#ifdef EMBEDDED_LIBRARY
int embedded_ssl_check(MYSQL *mysql);
#endif

/* client side of the pluggable authentication */
struct st_plugin_vio_info;
void mpvio_info(Vio *vio, struct st_plugin_vio_info *info);
int run_plugin_auth(MYSQL *mysql, char *data, uint data_len,
                    const char *data_plugin, const char *db);
int mysql_client_plugin_init();
void mysql_client_plugin_deinit();

struct st_mysql_client_plugin;
extern struct st_mysql_client_plugin *mysql_client_builtins[];
uchar * send_client_connect_attrs(MYSQL *mysql, uchar *buf);
extern my_bool libmysql_cleartext_plugin_enabled;
int is_file_or_dir_world_writable(const char *filepath);
void read_ok_ex(MYSQL *mysql, unsigned long len);

#ifdef	__cplusplus
}
#endif

#define protocol_41(A) ((A)->server_capabilities & CLIENT_PROTOCOL_41)

#endif /* SQL_COMMON_INCLUDED */
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