/* Copyright (C) 2000 MySQL AB & MySQL Finland AB
   
   This software is distributed with NO WARRANTY OF ANY KIND.  No author or
   distributor accepts any responsibility for the consequences of using it, or
   for whether it serves any particular purpose or works at all, unless he or
   she says so in writing.  Refer to the MySQLEULA.txt file for details.
   
   Every copy of this file must include a copy of the License, normally in a
   plain ASCII text file named MySQLEULA.txt. The License grants you the right to
   copy, modify and redistribute this file, but only under certain conditions
   described in the License.  Among other things, the License requires that
   the copyright notice and this notice be preserved on all copies */

/*
** Common definition between mysql server & client
*/

#ifndef _mysql_com_h
#define _mysql_com_h

#define NAME_LEN	64		/* Field/table name length */
#define HOSTNAME_LENGTH 60
#define USERNAME_LENGTH 16
#define SERVER_VERSION_LENGTH 60
#define SQLSTATE_LENGTH 5

#define LOCAL_HOST	"localhost"
#define LOCAL_HOST_NAMEDPIPE "."


#if defined(__WIN__) && !defined( _CUSTOMCONFIG_)
#define MYSQL_NAMEDPIPE "MySQL"
#define MYSQL_SERVICENAME "MySQL"
#endif /* __WIN__ */

enum enum_server_command
{
  COM_SLEEP, COM_QUIT, COM_INIT_DB, COM_QUERY, COM_FIELD_LIST,
  COM_CREATE_DB, COM_DROP_DB, COM_REFRESH, COM_SHUTDOWN, COM_STATISTICS,
  COM_PROCESS_INFO, COM_CONNECT, COM_PROCESS_KILL, COM_DEBUG, COM_PING,
  COM_TIME, COM_DELAYED_INSERT, COM_CHANGE_USER, COM_BINLOG_DUMP,
  COM_TABLE_DUMP, COM_CONNECT_OUT, COM_REGISTER_SLAVE,
  COM_PREPARE, COM_EXECUTE, COM_LONG_DATA, COM_CLOSE_STMT,
  COM_RESET_STMT, COM_SET_OPTION,
  COM_END				/* Must be last */
};


/*
  Length of random string sent by server on handshake; this is also length of
  obfuscated password, recieved from client 
*/
#define SCRAMBLE_LENGTH 20
#define SCRAMBLE_LENGTH_323 8
/* length of password stored in the db: new passwords are preceeded with '*' */
#define SCRAMBLED_PASSWORD_CHAR_LENGTH (SCRAMBLE_LENGTH*2+1)
#define SCRAMBLED_PASSWORD_CHAR_LENGTH_323 (SCRAMBLE_LENGTH_323*2)


#define NOT_NULL_FLAG	1		/* Field can't be NULL */
#define PRI_KEY_FLAG	2		/* Field is part of a primary key */
#define UNIQUE_KEY_FLAG 4		/* Field is part of a unique key */
#define MULTIPLE_KEY_FLAG 8		/* Field is part of a key */
#define BLOB_FLAG	16		/* Field is a blob */
#define UNSIGNED_FLAG	32		/* Field is unsigned */
#define ZEROFILL_FLAG	64		/* Field is zerofill */
#define BINARY_FLAG	128		/* Field is binary   */

/* The following are only sent to new clients */
#define ENUM_FLAG	256		/* field is an enum */
#define AUTO_INCREMENT_FLAG 512		/* field is a autoincrement field */
#define TIMESTAMP_FLAG	1024		/* Field is a timestamp */
#define SET_FLAG	2048		/* field is a set */
#define NUM_FLAG	32768		/* Field is num (for clients) */
#define PART_KEY_FLAG	16384		/* Intern; Part of some key */
#define GROUP_FLAG	32768		/* Intern: Group field */
#define UNIQUE_FLAG	65536		/* Intern: Used by sql_yacc */

#define REFRESH_GRANT		1	/* Refresh grant tables */
#define REFRESH_LOG		2	/* Start on new log file */
#define REFRESH_TABLES		4	/* close all tables */
#define REFRESH_HOSTS		8	/* Flush host cache */
#define REFRESH_STATUS		16	/* Flush status variables */
#define REFRESH_THREADS		32	/* Flush thread cache */
#define REFRESH_SLAVE           64      /* Reset master info and restart slave
					   thread */
#define REFRESH_MASTER          128     /* Remove all bin logs in the index
					   and truncate the index */

/* The following can't be set with mysql_refresh() */
#define REFRESH_READ_LOCK	16384	/* Lock tables for read */
#define REFRESH_FAST		32768	/* Intern flag */

/* RESET (remove all queries) from query cache */
#define REFRESH_QUERY_CACHE	65536
#define REFRESH_QUERY_CACHE_FREE 0x20000L /* pack query cache */
#define REFRESH_DES_KEY_FILE	0x40000L
#define REFRESH_USER_RESOURCES	0x80000L

#define CLIENT_LONG_PASSWORD	1	/* new more secure passwords */
#define CLIENT_FOUND_ROWS	2	/* Found instead of affected rows */
#define CLIENT_LONG_FLAG	4	/* Get all column flags */
#define CLIENT_CONNECT_WITH_DB	8	/* One can specify db on connect */
#define CLIENT_NO_SCHEMA	16	/* Don't allow database.table.column */
#define CLIENT_COMPRESS		32	/* Can use compression protocol */
#define CLIENT_ODBC		64	/* Odbc client */
#define CLIENT_LOCAL_FILES	128	/* Can use LOAD DATA LOCAL */
#define CLIENT_IGNORE_SPACE	256	/* Ignore spaces before '(' */
#define CLIENT_PROTOCOL_41	512	/* New 4.1 protocol */
#define CLIENT_INTERACTIVE	1024	/* This is an interactive client */
#define CLIENT_SSL              2048	/* Switch to SSL after handshake */
#define CLIENT_IGNORE_SIGPIPE   4096    /* IGNORE sigpipes */
#define CLIENT_TRANSACTIONS	8192	/* Client knows about transactions */
#define CLIENT_RESERVED         16384   /* Old flag for 4.1 protocol  */
#define CLIENT_SECURE_CONNECTION 32768  /* New 4.1 authentication */
#define CLIENT_MULTI_STATEMENTS 65536   /* Enable/disable multi-stmt support */
#define CLIENT_MULTI_RESULTS    131072  /* Enable/disable multi-results */
#define CLIENT_REMEMBER_OPTIONS	((ulong) (1L << 31))

#define SERVER_STATUS_IN_TRANS     1	/* Transaction has started */
#define SERVER_STATUS_AUTOCOMMIT   2	/* Server in auto_commit mode */
#define SERVER_STATUS_MORE_RESULTS 4	/* More results on server */
#define SERVER_MORE_RESULTS_EXISTS 8    /* Multi query - next query exists */
#define SERVER_QUERY_NO_GOOD_INDEX_USED 16
#define SERVER_QUERY_NO_INDEX_USED      32

#define MYSQL_ERRMSG_SIZE	512
#define NET_READ_TIMEOUT	30		/* Timeout on read */
#define NET_WRITE_TIMEOUT	60		/* Timeout on write */
#define NET_WAIT_TIMEOUT	8*60*60		/* Wait for new query */

#define ONLY_KILL_QUERY         1

struct st_vio;					/* Only C */
typedef struct st_vio Vio;

#define MAX_CHAR_WIDTH		255	/* Max length for a CHAR colum */
#define MAX_BLOB_WIDTH		8192	/* Default width for blob */

typedef struct st_net {
#if !defined(CHECK_EMBEDDED_DIFFERENCES) || !defined(EMBEDDED_LIBRARY)
  Vio* vio;
  unsigned char *buff,*buff_end,*write_pos,*read_pos;
  my_socket fd;					/* For Perl DBI/dbd */
  unsigned long max_packet,max_packet_size;
  unsigned int pkt_nr,compress_pkt_nr;
  unsigned int write_timeout, read_timeout, retry_count;
  int fcntl;
  my_bool compress;
  /*
    The following variable is set if we are doing several queries in one
    command ( as in LOAD TABLE ... FROM MASTER ),
    and do not want to confuse the client with OK at the wrong time
  */
  unsigned long remain_in_buf,length, buf_length, where_b;
  unsigned int *return_status;
  unsigned char reading_or_writing;
  char save_char;
  my_bool no_send_ok;  /* For SPs and other things that do multiple stmts */
  my_bool no_send_eof; /* For SPs' first version read-only cursors */
  /*
    Pointer to query object in query cache, do not equal NULL (0) for
    queries in cache that have not stored its results yet
  */
#endif
  char last_error[MYSQL_ERRMSG_SIZE], sqlstate[SQLSTATE_LENGTH+1];
  unsigned int last_errno;
  unsigned char error;
  gptr query_cache_query;
  my_bool report_error; /* We should report error (we have unreported error) */
  my_bool return_errno;
} NET;

#define packet_error (~(unsigned long) 0)

enum enum_field_types { MYSQL_TYPE_DECIMAL, MYSQL_TYPE_TINY,
			MYSQL_TYPE_SHORT,  MYSQL_TYPE_LONG,
			MYSQL_TYPE_FLOAT,  MYSQL_TYPE_DOUBLE,
			MYSQL_TYPE_NULL,   MYSQL_TYPE_TIMESTAMP,
			MYSQL_TYPE_LONGLONG,MYSQL_TYPE_INT24,
			MYSQL_TYPE_DATE,   MYSQL_TYPE_TIME,
			MYSQL_TYPE_DATETIME, MYSQL_TYPE_YEAR,
			MYSQL_TYPE_NEWDATE,
			MYSQL_TYPE_ENUM=247,
			MYSQL_TYPE_SET=248,
			MYSQL_TYPE_TINY_BLOB=249,
			MYSQL_TYPE_MEDIUM_BLOB=250,
			MYSQL_TYPE_LONG_BLOB=251,
			MYSQL_TYPE_BLOB=252,
			MYSQL_TYPE_VAR_STRING=253,
			MYSQL_TYPE_STRING=254,
			MYSQL_TYPE_GEOMETRY=255

};

/* For backward compatibility */
#define CLIENT_MULTI_QUERIES    CLIENT_MULTI_STATEMENTS    
#define FIELD_TYPE_DECIMAL     MYSQL_TYPE_DECIMAL
#define FIELD_TYPE_TINY        MYSQL_TYPE_TINY
#define FIELD_TYPE_SHORT       MYSQL_TYPE_SHORT
#define FIELD_TYPE_LONG        MYSQL_TYPE_LONG
#define FIELD_TYPE_FLOAT       MYSQL_TYPE_FLOAT
#define FIELD_TYPE_DOUBLE      MYSQL_TYPE_DOUBLE
#define FIELD_TYPE_NULL        MYSQL_TYPE_NULL
#define FIELD_TYPE_TIMESTAMP   MYSQL_TYPE_TIMESTAMP
#define FIELD_TYPE_LONGLONG    MYSQL_TYPE_LONGLONG
#define FIELD_TYPE_INT24       MYSQL_TYPE_INT24
#define FIELD_TYPE_DATE        MYSQL_TYPE_DATE
#define FIELD_TYPE_TIME        MYSQL_TYPE_TIME
#define FIELD_TYPE_DATETIME    MYSQL_TYPE_DATETIME
#define FIELD_TYPE_YEAR        MYSQL_TYPE_YEAR
#define FIELD_TYPE_NEWDATE     MYSQL_TYPE_NEWDATE
#define FIELD_TYPE_ENUM        MYSQL_TYPE_ENUM
#define FIELD_TYPE_SET         MYSQL_TYPE_SET
#define FIELD_TYPE_TINY_BLOB   MYSQL_TYPE_TINY_BLOB
#define FIELD_TYPE_MEDIUM_BLOB MYSQL_TYPE_MEDIUM_BLOB
#define FIELD_TYPE_LONG_BLOB   MYSQL_TYPE_LONG_BLOB
#define FIELD_TYPE_BLOB        MYSQL_TYPE_BLOB
#define FIELD_TYPE_VAR_STRING  MYSQL_TYPE_VAR_STRING
#define FIELD_TYPE_STRING      MYSQL_TYPE_STRING
#define FIELD_TYPE_CHAR        MYSQL_TYPE_TINY
#define FIELD_TYPE_INTERVAL    MYSQL_TYPE_ENUM
#define FIELD_TYPE_GEOMETRY    MYSQL_TYPE_GEOMETRY

#if TO_BE_INCLUDED_LATER
/* For bind applications, to indicate unsigned buffers */
#define MYSQL_TYPE_UTINY     -10
#define MYSQL_TYPE_USHORT    -9
#define MYSQL_TYPE_ULONG     -8
#define MYSQL_TYPE_UFLOAT    -7
#define MYSQL_TYPE_UDOUBLE   -6
#define MYSQL_TYPE_ULONGLONG -5
#define MYSQL_TYPE_UINT24    -4
#endif

/* options for mysql_set_option */
enum enum_mysql_set_option
{
  MYSQL_OPTION_MULTI_STATEMENTS_ON,
  MYSQL_OPTION_MULTI_STATEMENTS_OFF
};

#define net_new_transaction(net) ((net)->pkt_nr=0)

#ifdef __cplusplus
extern "C" {
#endif

my_bool	my_net_init(NET *net, Vio* vio);
void	my_net_local_init(NET *net);
void	net_end(NET *net);
void	net_clear(NET *net);
my_bool net_realloc(NET *net, unsigned long length);

#ifndef EMBEDDED_LIBRARY /* To be removed by HF */
my_bool	net_flush(NET *net);
#else
#define net_flush(A)
#endif

my_bool	my_net_write(NET *net,const char *packet,unsigned long len);
my_bool	net_write_command(NET *net,unsigned char command,
			  const char *header, unsigned long head_len,
			  const char *packet, unsigned long len);
int	net_real_write(NET *net,const char *packet,unsigned long len);
unsigned long my_net_read(NET *net);

/*
  The following function is not meant for normal usage
  Currently it's used internally by manager.c
*/
struct sockaddr;
int my_connect(my_socket s, const struct sockaddr *name, unsigned int namelen,
	       unsigned int timeout);

struct rand_struct {
  unsigned long seed1,seed2,max_value;
  double max_value_dbl;
};

#ifdef __cplusplus
}
#endif

  /* The following is for user defined functions */

enum Item_result {STRING_RESULT, REAL_RESULT, INT_RESULT, ROW_RESULT};

typedef struct st_udf_args
{
  unsigned int arg_count;		/* Number of arguments */
  enum Item_result *arg_type;		/* Pointer to item_results */
  char **args;				/* Pointer to argument */
  unsigned long *lengths;		/* Length of string arguments */
  char *maybe_null;			/* Set to 1 for all maybe_null args */
  char **attributes;                    /* Pointer to attribute name */
  unsigned long *attribute_lengths;     /* Length of attribute arguments */
} UDF_ARGS;

  /* This holds information about the result */

typedef struct st_udf_init
{
  my_bool maybe_null;			/* 1 if function can return NULL */
  unsigned int decimals;		/* for real functions */
  unsigned long max_length;		/* For string functions */
  char	  *ptr;				/* free pointer for function data */
  my_bool const_item;			/* 0 if result is independent of arguments */
} UDF_INIT;

  /* Constants when using compression */
#define NET_HEADER_SIZE 4		/* standard header size */
#define COMP_HEADER_SIZE 3		/* compression header extra size */

  /* Prototypes to password functions */

#ifdef __cplusplus
extern "C" {
#endif

extern unsigned long max_allowed_packet;
extern unsigned long net_buffer_length;

/*
  These functions are used for authentication by client and server and
  implemented in sql/password.c
*/

void randominit(struct rand_struct *, unsigned long seed1,
                unsigned long seed2);
double my_rnd(struct rand_struct *);
void create_random_string(char *to, unsigned int length, struct rand_struct *rand_st);

void hash_password(unsigned long *to, const char *password, unsigned int password_len);
void make_scrambled_password_323(char *to, const char *password);
void scramble_323(char *to, const char *message, const char *password);
my_bool check_scramble_323(const char *, const char *message,
                           unsigned long *salt);
void get_salt_from_password_323(unsigned long *res, const char *password);
void make_password_from_salt_323(char *to, const unsigned long *salt);

void make_scrambled_password(char *to, const char *password);
void scramble(char *to, const char *message, const char *password);
my_bool check_scramble(const char *reply, const char *message,
                       const unsigned char *hash_stage2);
void get_salt_from_password(unsigned char *res, const char *password);
void make_password_from_salt(char *to, const unsigned char *hash_stage2);

/* end of password.c */

char *get_tty_password(char *opt_message);
const char *mysql_errno_to_sqlstate(unsigned int mysql_errno);

/* Some other useful functions */

my_bool my_init(void);
int load_defaults(const char *conf_file, const char **groups,
		  int *argc, char ***argv);
my_bool my_thread_init(void);
void my_thread_end(void);

#ifdef _global_h
ulong STDCALL net_field_length(uchar **packet);
my_ulonglong net_field_length_ll(uchar **packet);
char *net_store_length(char *pkg, ulonglong length);
#endif

#ifdef __cplusplus
}
#endif

#define NULL_LENGTH ((unsigned long) ~0) /* For net_store_length */
#define MYSQL_STMT_HEADER       4
#define	MYSQL_LONG_DATA_HEADER	6

#endif
