/* Copyright (C) 2000 MySQL AB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   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 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/*
** 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 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 */

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;
  /*
    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 */
} 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 */

void 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
