proto.h

/* FreeTDS - Library of routines accessing Sybase and Microsoft databases
 * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005  Brian Bruns
 * Copyright (C) 2010, 2011  Frediano Ziglio
 *
 * 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, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
 
/*
 * This file contains defines and structures strictly related to TDS protocol
 */
 
typedef struct tdsnumeric
{
    unsigned char precision;
    unsigned char scale;
    unsigned char array[33];
} TDS_NUMERIC;
 
typedef struct tdsoldmoney
{
    TDS_INT mnyhigh;
    TDS_UINT mnylow;
} TDS_OLD_MONEY;
 
typedef union tdsmoney
{
    TDS_OLD_MONEY tdsoldmoney;
    TDS_INT8 mny;
} TDS_MONEY;
 
typedef struct tdsmoney4
{
    TDS_INT mny4;
} TDS_MONEY4;
 
typedef struct tdsdatetime
{
    TDS_INT dtdays;
    TDS_INT dttime;
} TDS_DATETIME;
 
typedef struct tdsdatetime4
{
    TDS_USMALLINT days;
    TDS_USMALLINT minutes;
} TDS_DATETIME4;
 
typedef struct tdsunique
{
    TDS_UINT Data1;
    TDS_USMALLINT Data2;
    TDS_USMALLINT Data3;
    TDS_UCHAR Data4[8];
} TDS_UNIQUE;
 
typedef TDS_INT TDS_DATE;
typedef TDS_INT TDS_TIME;
 
typedef TDS_UINT8 TDS_BIGTIME;
typedef TDS_UINT8 TDS_BIGDATETIME;
 
#define TDS5_PARAMFMT2_TOKEN       32   /* 0x20 */
#define TDS_LANGUAGE_TOKEN         33   /* 0x21    TDS 5.0 only              */
#define TDS_ORDERBY2_TOKEN         34   /* 0x22 */
#define TDS_ROWFMT2_TOKEN          97   /* 0x61    TDS 5.0 only              */
#define TDS_MSG_TOKEN             101   /* 0x65    TDS 5.0 only              */
#define TDS_LOGOUT_TOKEN          113   /* 0x71    TDS 5.0 only? ct_close()  */
#define TDS_RETURNSTATUS_TOKEN    121   /* 0x79                              */
#define TDS_PROCID_TOKEN          124   /* 0x7C    TDS 4.2 only - TDS_PROCID */
#define TDS7_RESULT_TOKEN         129   /* 0x81    TDS 7.0 only              */
#define TDS7_COMPUTE_RESULT_TOKEN 136   /* 0x88    TDS 7.0 only              */
#define TDS_COLNAME_TOKEN         160   /* 0xA0    TDS 4.2 only              */
#define TDS_COLFMT_TOKEN          161   /* 0xA1    TDS 4.2 only - TDS_COLFMT */
#define TDS_DYNAMIC2_TOKEN        163   /* 0xA3 */
#define TDS_TABNAME_TOKEN         164   /* 0xA4 */
#define TDS_COLINFO_TOKEN         165   /* 0xA5 */
#define TDS_OPTIONCMD_TOKEN       166   /* 0xA6 */
#define TDS_COMPUTE_NAMES_TOKEN   167   /* 0xA7 */
#define TDS_COMPUTE_RESULT_TOKEN  168   /* 0xA8 */
#define TDS_ORDERBY_TOKEN         169   /* 0xA9    TDS_ORDER                 */
#define TDS_ERROR_TOKEN           170   /* 0xAA                              */
#define TDS_INFO_TOKEN            171   /* 0xAB                              */
#define TDS_PARAM_TOKEN           172   /* 0xAC    RETURNVALUE?              */
#define TDS_LOGINACK_TOKEN        173   /* 0xAD                              */
#define TDS_CONTROL_FEATUREEXTACK_TOKEN \
                  174   /* 0xAE    TDS_CONTROL/TDS_FEATUREEXTACK */
#define TDS_ROW_TOKEN             209   /* 0xD1                              */
#define TDS_NBC_ROW_TOKEN         210   /* 0xD2    as of TDS 7.3.B           */
#define TDS_CMP_ROW_TOKEN         211   /* 0xD3                              */
#define TDS5_PARAMS_TOKEN         215   /* 0xD7    TDS 5.0 only              */
#define TDS_CAPABILITY_TOKEN      226   /* 0xE2                              */
#define TDS_ENVCHANGE_TOKEN       227   /* 0xE3                              */
#define TDS_SESSIONSTATE_TOKEN    228   /* 0xE4    TDS 7.4                   */
#define TDS_EED_TOKEN             229   /* 0xE5                              */
#define TDS_DBRPC_TOKEN           230   /* 0xE6    TDS 5.0 only              */
#define TDS5_DYNAMIC_TOKEN        231   /* 0xE7    TDS 5.0 only              */
#define TDS5_PARAMFMT_TOKEN       236   /* 0xEC    TDS 5.0 only              */
#define TDS_AUTH_TOKEN            237   /* 0xED    TDS 7.0 only              */
#define TDS_RESULT_TOKEN          238   /* 0xEE                              */
#define TDS_DONE_TOKEN            253   /* 0xFD    TDS_DONE                  */
#define TDS_DONEPROC_TOKEN        254   /* 0xFE    TDS_DONEPROC              */
#define TDS_DONEINPROC_TOKEN      255   /* 0xFF    TDS_DONEINPROC            */
 
/* CURSOR support: TDS 5.0 only*/
#define TDS_CURCLOSE_TOKEN        128  /* 0x80    TDS 5.0 only              */
#define TDS_CURDELETE_TOKEN       129  /* 0x81    TDS 5.0 only              */
#define TDS_CURFETCH_TOKEN        130  /* 0x82    TDS 5.0 only              */
#define TDS_CURINFO_TOKEN         131  /* 0x83    TDS 5.0 only              */
#define TDS_CUROPEN_TOKEN         132  /* 0x84    TDS 5.0 only              */
#define TDS_CURDECLARE_TOKEN      134  /* 0x86    TDS 5.0 only              */
 
 
/* environment type field */
#define TDS_ENV_DATABASE    1
#define TDS_ENV_LANG        2
#define TDS_ENV_CHARSET     3
#define TDS_ENV_PACKSIZE    4
#define TDS_ENV_LCID            5
#define TDS_ENV_SQLCOLLATION    7
#define TDS_ENV_BEGINTRANS  8
#define TDS_ENV_COMMITTRANS 9
#define TDS_ENV_ROLLBACKTRANS   10
#define TDS_ENV_ROUTING     20
 
/* Microsoft internal stored procedure id's */
#define TDS_SP_CURSOR           1
#define TDS_SP_CURSOROPEN       2
#define TDS_SP_CURSORPREPARE    3
#define TDS_SP_CURSOREXECUTE    4
#define TDS_SP_CURSORPREPEXEC   5
#define TDS_SP_CURSORUNPREPARE  6
#define TDS_SP_CURSORFETCH      7
#define TDS_SP_CURSOROPTION     8
#define TDS_SP_CURSORCLOSE      9
#define TDS_SP_EXECUTESQL      10
#define TDS_SP_PREPARE         11
#define TDS_SP_EXECUTE         12
#define TDS_SP_PREPEXEC        13
#define TDS_SP_PREPEXECRPC     14
#define TDS_SP_UNPREPARE       15
 
/* 
 * <rant> Sybase does an awful job of this stuff, non null ints of size 1 2 
 * and 4 have there own codes but nullable ints are lumped into INTN
 * sheesh! </rant>
 */
typedef enum
{
    SYBCHAR = 47,       /* 0x2F */
    SYBVARCHAR = 39,    /* 0x27 */
    SYBINTN = 38,       /* 0x26 */
    SYBINT1 = 48,       /* 0x30 */
    SYBINT2 = 52,       /* 0x34 */
    SYBINT4 = 56,       /* 0x38 */
    SYBFLT8 = 62,       /* 0x3E */
    SYBDATETIME = 61,   /* 0x3D */
    SYBBIT = 50,        /* 0x32 */
    SYBTEXT = 35,       /* 0x23 */
    SYBNTEXT = 99,      /* 0x63 */
    SYBIMAGE = 34,      /* 0x22 */
    SYBMONEY4 = 122,    /* 0x7A */
    SYBMONEY = 60,      /* 0x3C */
    SYBDATETIME4 = 58,  /* 0x3A */
    SYBREAL = 59,       /* 0x3B */
    SYBBINARY = 45,     /* 0x2D */
    SYBVOID = 31,       /* 0x1F */
    SYBVARBINARY = 37,  /* 0x25 */
    SYBBITN = 104,      /* 0x68 */
    SYBNUMERIC = 108,   /* 0x6C */
    SYBDECIMAL = 106,   /* 0x6A */
    SYBFLTN = 109,      /* 0x6D */
    SYBMONEYN = 110,    /* 0x6E */
    SYBDATETIMN = 111,  /* 0x6F */
 
/*
 * MS only types
 */
    SYBNVARCHAR = 103,  /* 0x67 */
    SYBINT8 = 127,      /* 0x7F */
    XSYBCHAR = 175,     /* 0xAF */
    XSYBVARCHAR = 167,  /* 0xA7 */
    XSYBNVARCHAR = 231, /* 0xE7 */
    XSYBNCHAR = 239,    /* 0xEF */
    XSYBVARBINARY = 165,    /* 0xA5 */
    XSYBBINARY = 173,   /* 0xAD */
    SYBUNIQUE = 36,     /* 0x24 */
    SYBVARIANT = 98,    /* 0x62 */
    SYBMSUDT = 240,     /* 0xF0 */
    SYBMSXML = 241,     /* 0xF1 */
    SYBMSDATE = 40,     /* 0x28 */
    SYBMSTIME = 41,     /* 0x29 */
    SYBMSDATETIME2 = 42,    /* 0x2a */
    SYBMSDATETIMEOFFSET = 43,/* 0x2b */
    SYBMSTABLE = 243,   /* 0xF3 */
 
/*
 * Sybase only types
 */
    SYBLONGBINARY = 225,    /* 0xE1 */
    SYBUINT1 = 64,      /* 0x40 */
    SYBUINT2 = 65,      /* 0x41 */
    SYBUINT4 = 66,      /* 0x42 */
    SYBUINT8 = 67,      /* 0x43 */
    SYBBLOB = 36,       /* 0x24 */
    SYBBOUNDARY = 104,  /* 0x68 */
    SYBDATE = 49,       /* 0x31 */
    SYBDATEN = 123,     /* 0x7B */
    SYB5INT8 = 191,     /* 0xBF */
    SYBINTERVAL = 46,   /* 0x2E */
    SYBLONGCHAR = 175,  /* 0xAF */
    SYBSENSITIVITY = 103,   /* 0x67 */
    SYBSINT1 = 176,     /* 0xB0 */
    SYBTIME = 51,       /* 0x33 */
    SYBTIMEN = 147,     /* 0x93 */
    SYBUINTN = 68,      /* 0x44 */
    SYBUNITEXT = 174,   /* 0xAE */
    SYBXML = 163,       /* 0xA3 */
    SYB5BIGDATETIME = 187,  /* 0xBB */
    SYB5BIGTIME = 188,  /* 0xBC */
 
} TDS_SERVER_TYPE;
 
typedef enum
{
    USER_CHAR_TYPE = 1,     /* 0x01 */
    USER_VARCHAR_TYPE = 2,      /* 0x02 */
    USER_SYSNAME_TYPE = 18,     /* 0x12 */
    USER_NCHAR_TYPE = 24,       /* 0x18 */
    USER_NVARCHAR_TYPE = 25,    /* 0x19 */
    USER_UNICHAR_TYPE = 34,     /* 0x22 */
    USER_UNIVARCHAR_TYPE = 35,  /* 0x23 */
    USER_UNITEXT_TYPE = 36,     /* 0x24 */
} TDS_USER_TYPE;
 
/* compute operator */
#define SYBAOPCNT  75       /* 0x4B */
#define SYBAOPCNTU 76       /* 0x4C, obsolete */
#define SYBAOPSUM  77       /* 0x4D */
#define SYBAOPSUMU 78       /* 0x4E, obsolete */
#define SYBAOPAVG  79       /* 0x4F */
#define SYBAOPAVGU 80       /* 0x50, obsolete */
#define SYBAOPMIN  81       /* 0x51 */
#define SYBAOPMAX  82       /* 0x52 */
 
/* mssql2k compute operator */
#define SYBAOPCNT_BIG       9   /* 0x09 */
#define SYBAOPSTDEV     48  /* 0x30 */
#define SYBAOPSTDEVP        49  /* 0x31 */
#define SYBAOPVAR       50  /* 0x32 */
#define SYBAOPVARP      51  /* 0x33 */
#define SYBAOPCHECKSUM_AGG  114 /* 0x72 */
 
typedef enum
{
      TDS_OPT_SET = 1   
    , TDS_OPT_DEFAULT = 2   
    , TDS_OPT_LIST = 3  
    , TDS_OPT_INFO = 4  
} TDS_OPTION_CMD;
 
typedef enum
{
      TDS_OPT_DATEFIRST = 1     /* 0x01 */
    , TDS_OPT_TEXTSIZE = 2      /* 0x02 */
    , TDS_OPT_STAT_TIME = 3     /* 0x03 */
    , TDS_OPT_STAT_IO = 4       /* 0x04 */
    , TDS_OPT_ROWCOUNT = 5      /* 0x05 */
    , TDS_OPT_NATLANG = 6       /* 0x06 */
    , TDS_OPT_DATEFORMAT = 7    /* 0x07 */
    , TDS_OPT_ISOLATION = 8     /* 0x08 */
    , TDS_OPT_AUTHON = 9        /* 0x09 */
    , TDS_OPT_CHARSET = 10      /* 0x0a */
    , TDS_OPT_SHOWPLAN = 13     /* 0x0d */
    , TDS_OPT_NOEXEC = 14       /* 0x0e */
    , TDS_OPT_ARITHIGNOREON = 15    /* 0x0f */
    , TDS_OPT_ARITHABORTON = 17 /* 0x11 */
    , TDS_OPT_PARSEONLY = 18    /* 0x12 */
    , TDS_OPT_GETDATA = 20      /* 0x14 */
    , TDS_OPT_NOCOUNT = 21      /* 0x15 */
    , TDS_OPT_FORCEPLAN = 23    /* 0x17 */
    , TDS_OPT_FORMATONLY = 24   /* 0x18 */
    , TDS_OPT_CHAINXACTS = 25   /* 0x19 */
    , TDS_OPT_CURCLOSEONXACT = 26   /* 0x1a */
    , TDS_OPT_FIPSFLAG = 27     /* 0x1b */
    , TDS_OPT_RESTREES = 28     /* 0x1c */
    , TDS_OPT_IDENTITYON = 29   /* 0x1d */
    , TDS_OPT_CURREAD = 30      /* 0x1e */
    , TDS_OPT_CURWRITE = 31     /* 0x1f */
    , TDS_OPT_IDENTITYOFF = 32  /* 0x20 */
    , TDS_OPT_AUTHOFF = 33      /* 0x21 */
    , TDS_OPT_ANSINULL = 34     /* 0x22 */
    , TDS_OPT_QUOTED_IDENT = 35 /* 0x23 */
    , TDS_OPT_ARITHIGNOREOFF = 36   /* 0x24 */
    , TDS_OPT_ARITHABORTOFF = 37    /* 0x25 */
    , TDS_OPT_TRUNCABORT = 38   /* 0x26 */
} TDS_OPTION;
 
enum {
    TDS_OPT_ARITHOVERFLOW = 0x01,
    TDS_OPT_NUMERICTRUNC = 0x02
};
 
enum TDS_OPT_DATEFIRST_CHOICE
{
    TDS_OPT_MONDAY = 1, TDS_OPT_TUESDAY = 2, TDS_OPT_WEDNESDAY = 3, TDS_OPT_THURSDAY = 4, TDS_OPT_FRIDAY = 5, TDS_OPT_SATURDAY =
        6, TDS_OPT_SUNDAY = 7
};
 
enum TDS_OPT_DATEFORMAT_CHOICE
{
    TDS_OPT_FMTMDY = 1, TDS_OPT_FMTDMY = 2, TDS_OPT_FMTYMD = 3, TDS_OPT_FMTYDM = 4, TDS_OPT_FMTMYD = 5, TDS_OPT_FMTDYM = 6
};
enum TDS_OPT_ISOLATION_CHOICE
{
    TDS_OPT_LEVEL0 = 0,
    TDS_OPT_LEVEL1 = 1,
    TDS_OPT_LEVEL2 = 2,
    TDS_OPT_LEVEL3 = 3
};
 
 
typedef enum tds_packet_type
{
    TDS_QUERY = 1,
    TDS_LOGIN = 2,
    TDS_RPC = 3,
    TDS_REPLY = 4,
    TDS_CANCEL = 6,
    TDS_BULK = 7,
    TDS7_TRANS = 14,    /* transaction management */
    TDS_NORMAL = 15,
    TDS7_LOGIN = 16,
    TDS7_AUTH = 17,
    TDS71_PRELOGIN = 18,
    TDS72_SMP = 0x53
} TDS_PACKET_TYPE;
 
typedef struct
{
    TDS_USMALLINT locale_id;    /* master..syslanguages.lcid */
    TDS_USMALLINT flags;
    TDS_UCHAR charset_id;       /* or zero */
} TDS71_COLLATION;
 
typedef struct
{
    TDS_UCHAR signature;    /* TDS72_SMP */
    TDS_UCHAR type;
    TDS_USMALLINT sid;
    TDS_UINT size;
    TDS_UINT seq;
    TDS_UINT wnd;
} TDS72_SMP_HEADER;
 
enum {
    TDS_SMP_SYN = 1,
    TDS_SMP_ACK = 2,
    TDS_SMP_FIN = 4,
    TDS_SMP_DATA = 8,
};
 
/* SF stands for "sort flag" */
#define TDS_SF_BIN                   (TDS_USMALLINT) 0x100
#define TDS_SF_WIDTH_INSENSITIVE     (TDS_USMALLINT) 0x080
#define TDS_SF_KATATYPE_INSENSITIVE  (TDS_USMALLINT) 0x040
#define TDS_SF_ACCENT_SENSITIVE      (TDS_USMALLINT) 0x020
#define TDS_SF_CASE_INSENSITIVE      (TDS_USMALLINT) 0x010
 
/* UT stands for user type */
#define TDS_UT_TIMESTAMP             80
 
 
/* mssql login options flags */
enum option_flag1_values {
    TDS_BYTE_ORDER_X86      = 0, 
    TDS_CHARSET_ASCII       = 0, 
    TDS_DUMPLOAD_ON         = 0, 
    TDS_FLOAT_IEEE_754      = 0, 
    TDS_INIT_DB_WARN        = 0, 
    TDS_SET_LANG_OFF        = 0, 
    TDS_USE_DB_SILENT       = 0, 
    TDS_BYTE_ORDER_68000    = 0x01, 
    TDS_CHARSET_EBDDIC      = 0x02, 
    TDS_FLOAT_VAX       = 0x04, 
    TDS_FLOAT_ND5000        = 0x08, 
    TDS_DUMPLOAD_OFF        = 0x10, /* prevent BCP */ 
    TDS_USE_DB_NOTIFY       = 0x20, 
    TDS_INIT_DB_FATAL       = 0x40, 
    TDS_SET_LANG_ON     = 0x80
};
 
enum option_flag2_values {
    TDS_INIT_LANG_WARN      = 0, 
    TDS_INTEGRATED_SECURTY_OFF  = 0, 
    TDS_ODBC_OFF        = 0, 
    TDS_USER_NORMAL     = 0,    /* SQL Server login */
    TDS_INIT_LANG_REQUIRED  = 0x01, 
    TDS_ODBC_ON         = 0x02, 
    TDS_TRANSACTION_BOUNDARY71  = 0x04, /* removed in TDS 7.2 */
    TDS_CACHE_CONNECT71     = 0x08, /* removed in TDS 7.2 */
    TDS_USER_SERVER     = 0x10, /* reserved */
    TDS_USER_REMUSER        = 0x20, /* DQ login */
    TDS_USER_SQLREPL        = 0x40, /* replication login */
    TDS_INTEGRATED_SECURITY_ON  = 0x80
};
 
enum option_flag3_values {
    TDS_RESTRICTED_COLLATION    = 0, 
    TDS_CHANGE_PASSWORD     = 0x01, /* TDS 7.2 */
    TDS_SEND_YUKON_BINARY_XML   = 0x02, /* TDS 7.2 */
    TDS_REQUEST_USER_INSTANCE   = 0x04, /* TDS 7.2 */
    TDS_UNKNOWN_COLLATION_HANDLING  = 0x08, /* TDS 7.3 */
    TDS_EXTENSION           = 0x10, /* TDS 7.4 */
};
 
enum type_flags {
    TDS_OLEDB_ON    = 0x10,
    TDS_READONLY_INTENT = 0x20,
};
 
/* Sybase dynamic types */
enum dynamic_types {
    TDS_DYN_PREPARE     = 0x01,
    TDS_DYN_EXEC        = 0x02,
    TDS_DYN_DEALLOC     = 0x04,
    TDS_DYN_EXEC_IMMED  = 0x08,
    TDS_DYN_PROCNAME    = 0x10,
    TDS_DYN_ACK     = 0x20,
    TDS_DYN_DESCIN      = 0x40,
    TDS_DYN_DESCOUT     = 0x80,
};
 
/* http://jtds.sourceforge.net/apiCursors.html */
/* Cursor scroll option, must be one of 0x01 - 0x10, OR'd with other bits */
enum {
    TDS_CUR_TYPE_KEYSET          = 0x0001, /* default */
    TDS_CUR_TYPE_DYNAMIC         = 0x0002,
    TDS_CUR_TYPE_FORWARD         = 0x0004,
    TDS_CUR_TYPE_STATIC          = 0x0008,
    TDS_CUR_TYPE_FASTFORWARDONLY = 0x0010,
    TDS_CUR_TYPE_PARAMETERIZED   = 0x1000,
    TDS_CUR_TYPE_AUTO_FETCH      = 0x2000
};
 
enum {
    TDS_CUR_CONCUR_READ_ONLY         = 1,
    TDS_CUR_CONCUR_SCROLL_LOCKS      = 2,
    TDS_CUR_CONCUR_OPTIMISTIC        = 4, /* default */
    TDS_CUR_CONCUR_OPTIMISTIC_VALUES = 8
};
 
/* TDS 4/5 login*/
#define TDS_MAXNAME 30  /* maximum login name lenghts */
#define TDS_PROGNLEN 10 /* maximum program lenght */
#define TDS_PKTLEN 6    /* maximum packet lenght in login */
 
/* TDS 5 login security flags */
enum {
    TDS5_SEC_LOG_ENCRYPT = 1,
    TDS5_SEC_LOG_CHALLENGE = 2,
    TDS5_SEC_LOG_LABELS = 4,
    TDS5_SEC_LOG_APPDEFINED = 8,
    TDS5_SEC_LOG_SECSESS = 16,
    TDS5_SEC_LOG_ENCRYPT2 = 32,
    TDS5_SEC_LOG_ENCRYPT3 = 128,
};
 
enum {
    TDS5_MSG_SEC_ENCRYPT = 1, 
    TDS5_MSG_SEC_LOGPWD = 2, 
    TDS5_MSG_SEC_REMPWD = 3, 
    TDS5_MSG_SEC_CHALLENGE = 4, 
    TDS5_MSG_SEC_RESPONSE = 5, 
    TDS5_MSG_SEC_GETLABEL = 6, 
    TDS5_MSG_SEC_LABEL = 7, 
    TDS5_MSG_SQL_TBLNAME = 8, 
    TDS5_MSG_GW_RESERVED = 9, 
    TDS5_MSG_OMNI_CAPABILITIES = 10, 
    TDS5_MSG_SEC_OPAQUE = 11, 
    TDS5_MSG_HAFAILOVER = 12, 
    TDS5_MSG_EMPTY = 13, 
    TDS5_MSG_SEC_ENCRYPT2 = 14, 
    TDS5_MSG_SEC_LOGPWD2 = 15, 
    TDS5_MSG_SEC_SUP_CIPHER = 16, 
    TDS5_MSG_MIG_REQ = 17, 
    TDS5_MSG_MIG_SYNC = 18, 
    TDS5_MSG_MIG_CONT = 19, 
    TDS5_MSG_MIG_IGN = 20, 
    TDS5_MSG_MIG_FAIL = 21, 
    TDS5_MSG_SEC_REMPWD2 = 22,
    TDS5_MSG_MIG_RESUME = 23,
    TDS5_MSG_SEC_ENCRYPT3 = 30,
    TDS5_MSG_SEC_LOGPWD3 = 31,
    TDS5_MSG_SEC_REMPWD3 = 32,
    TDS5_MSG_DR_MAP = 33,
};
 
enum {
    TDS5_SEC_SECSESS = 1, 
    TDS5_SEC_FORWARD = 2, 
    TDS5_SEC_SIGN = 3, 
    TDS5_SEC_OTHER = 4, 
};
 
enum {
    TDS5_SEC_NETWORK_AUTHENTICATION = 0x1,
    TDS5_SEC_MUTUAL_AUTHENTICATION = 0x2,
    TDS5_SEC_DELEGATION = 0x4,
    TDS5_SEC_INTEGRITY = 0x8,
    TDS5_SEC_CONFIDENTIALITY = 0x10,
    TDS5_SEC_DETECT_REPLAY = 0x20,
    TDS5_SEC_DETECT_SEQUENCE = 0x40,
    TDS5_SEC_DATA_ORIGIN = 0x80,
    TDS5_SEC_CHANNEL_BINDING = 0x100,
};
 
enum {
    TDS5_SEC_VERSION = 50,
};
 
/* MS encryption byte (pre login) */
enum {
    TDS7_ENCRYPT_OFF,
    TDS7_ENCRYPT_ON,
    TDS7_ENCRYPT_NOT_SUP,
    TDS7_ENCRYPT_REQ,
};