mcs/class/Mono.Data.Tds/Mono.Data.Tds.Protocol/Tds42.cs

   1 //
   2 // Mono.Data.Tds.Protocol.Tds42.cs
   3 //
   4 // Author:
   5 //   Tim Coleman (tim@timcoleman.com)
   6 //
   7 // Copyright (C) 2002 Tim Coleman
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32
  33 namespace Mono.Data.Tds.Protocol {
  34         public class Tds42 : Tds
  35         {
  36                 #region Fields
  37
  38                 public static readonly TdsVersion Version = TdsVersion.tds42;
  39
  40                 #endregion // Fields
  41
  42                 #region Constructors
  43
  44                 public Tds42 (string server, int port)
  45                         : this (server, port, 512, 15)
  46                 {
  47                 }
  48
  49                 public Tds42 (string server, int port, int packetSize, int timeout)
  50                         : base (server, port, packetSize, timeout, Version)
  51                 {
  52                 }
  53
  54                 #endregion // Constructors
  55
  56                 #region Methods
  57
  58                 public override bool Connect (TdsConnectionParameters connectionParameters)
  59                 {
  60                         if (IsConnected)
  61                                 throw new InvalidOperationException ("The connection is already open.");
  62
  63                         SetCharset (connectionParameters.Charset);
  64                         SetLanguage (connectionParameters.Language);
  65
  66                         byte pad = (byte) 0;
  67                         byte[] empty = new byte[0];
  68
  69                         Comm.StartPacket (TdsPacketType.Logon);
  70
  71                         // hostname (offset 0)
  72                         byte[] tmp = Comm.Append (connectionParameters.Hostname, 30, pad);
  73                         Comm.Append ((byte) (tmp.Length < 30 ? tmp.Length : 30));
  74
  75                         // username (offset 31 0x1f)
  76                         tmp = Comm.Append (connectionParameters.User, 30, pad);
  77                         Comm.Append ((byte) (tmp.Length < 30 ? tmp.Length : 30));
  78
  79                         // password (offset 62 0x3e)
  80                         tmp = Comm.Append (connectionParameters.Password, 30, pad);
  81                         Comm.Append ((byte) (tmp.Length < 30 ? tmp.Length : 30));
  82
  83                         // hostproc (offset 93 0x5d)
  84                         Comm.Append ("00000116", 8, pad);
  85
  86                         // unused (offset 109 0x6d)
  87                         Comm.Append (empty, (30-14), pad);
  88
  89                         // apptype
  90                         Comm.Append ((byte) 0x0);
  91                         Comm.Append ((byte) 0xa0);
  92                         Comm.Append ((byte) 0x24);
  93                         Comm.Append ((byte) 0xcc);
  94                         Comm.Append ((byte) 0x50);
  95                         Comm.Append ((byte) 0x12);
  96
  97                         // hostproc length
  98                         Comm.Append ((byte) 8);
  99
 100                         // Byte order of 2 byte ints
 101                         // 2 = <MSB, LSB>, 3 = <LSB, MSB>
 102                         Comm.Append ((byte) 3);
 103
 104                         // Byte order of 4 byte ints
 105                         // 0 = <MSB, LSB>, 1 = <LSB, MSB>
 106                         Comm.Append ((byte) 1);
 107
 108                         // Character representation
 109                         // (6 = ASCII, 7 = EBCDIC)
 110                         Comm.Append ((byte) 6);
 111
 112                         // Eight byte floating point representation
 113                         // 4 = IEEE <MSB, ..., LSB>
 114                         // 5 = VAX 'D'
 115                         // 10 = IEEE <LSB, ..., MSB>
 116                         // 11 = ND5000
 117                         Comm.Append ((byte) 10);
 118
 119                         // Eight byte date format
 120                         // 8 = <MSB, ..., LSB>
 121                         Comm.Append ((byte) 9);
 122
 123                         // notify of use db
 124                         Comm.Append ((byte) 1);
 125
 126                         // disallow dump/load and bulk insert
 127                         Comm.Append ((byte) 1);
 128
 129                         // sql interface type
 130                         Comm.Append ((byte) 0);
 131
 132                         // type of network connection
 133                         Comm.Append ((byte) 0);
 134
 135
 136                         // spare [7]
 137                         Comm.Append (empty, 7, pad);
 138                         // appname
 139                         tmp = Comm.Append (connectionParameters.ApplicationName, 30, pad);
 140                         Comm.Append ((byte) (tmp.Length < 30 ? tmp.Length : 30));
 141
 142                         // server name
 143                         tmp = Comm.Append (DataSource, 30, pad);
 144                         Comm.Append ((byte) (tmp.Length < 30 ? tmp.Length : 30));
 145
 146                         // remote passwords
 147                         Comm.Append (empty, 2, pad);
 148                         tmp = Comm.Append (connectionParameters.Password, 253, pad);
 149                         Comm.Append ((byte) (tmp.Length < 253 ? tmp.Length + 2 : 253 + 2));
 150
 151                         // tds version
 152                         Comm.Append ((byte) (((byte) Version) / 10));
 153                         Comm.Append ((byte) (((byte) Version) % 10));
 154                         Comm.Append ((byte) 0);
 155                         Comm.Append ((byte) 0);
 156
 157                         // prog name
 158                         tmp = Comm.Append (connectionParameters.ProgName, 10, pad);
 159                         Comm.Append ((byte) (tmp.Length < 10 ? tmp.Length : 10));
 160
 161                         // prog version
 162                         Comm.Append ((byte) 6);
 163
 164                         // Tell the server we can handle SQLServer version 6
 165                         Comm.Append ((byte) 0);
 166
 167                         // Send zero to tell the server we can't handle any other version
 168                         Comm.Append ((byte) 0);
 169                         Comm.Append ((byte) 0);
 170
 171                         // auto convert short
 172                         Comm.Append ((byte) 0);
 173
 174                         // type of flt4
 175                         Comm.Append ((byte) 0x0d);
 176
 177                         // type of date4
 178                         Comm.Append ((byte) 0x11);
 179
 180                         // language
 181                         tmp = Comm.Append (Language, 30, pad);
 182                         Comm.Append ((byte) (tmp.Length < 30 ? tmp.Length : 30));
 183
 184                         // notify on lang change
 185                         Comm.Append ((byte) 1);
 186
 187                         // security label hierarchy
 188                         Comm.Append ((short) 0);
 189
 190                         // security components
 191                         Comm.Append (empty, 8, pad);
 192
 193                         // security spare
 194                         Comm.Append ((short) 0);
 195
 196                         // security login role
 197                         Comm.Append ((byte) 0);
 198
 199                         // charset
 200                         tmp = Comm.Append (Charset, 30, pad);
 201                         Comm.Append ((byte) (tmp.Length < 30 ? tmp.Length : 30));
 202
 203                         // notify on charset change
 204                         Comm.Append ((byte) 1);
 205
 206                         // length of tds packets
 207                         tmp = Comm.Append (PacketSize.ToString (), 6, pad);
 208                         Comm.Append ((byte) 3);
 209
 210                         // pad out to a longword
 211                         Comm.Append (empty, 8, pad);
 212
 213                         Comm.SendPacket ();
 214
 215                         MoreResults = true;
 216                         SkipToEnd ();
 217
 218                         return IsConnected;
 219                 }
 220
 221                 protected override TdsDataColumnCollection ProcessColumnInfo ()
 222                 {
 223                         byte precision;
 224                         byte scale;
 225                         int totalLength = Comm.GetTdsShort ();
 226                         int bytesRead = 0;
 227
 228                         TdsDataColumnCollection result = new TdsDataColumnCollection ();
 229
 230                         while (bytesRead < totalLength) {
 231                                 scale = 0;
 232                                 precision = 0;
 233
 234                                 int bufLength = -1;
 235                                 byte[] flagData = new byte[4];
 236                                 for (int i = 0; i < 4; i += 1) {
 237                                         flagData[i] = Comm.GetByte ();
 238                                         bytesRead += 1;
 239                                 }
 240                                 bool nullable = (flagData[2] & 0x01) > 0;
 241                                 bool caseSensitive = (flagData[2] & 0x02) > 0;
 242                                 bool writable = (flagData[2] & 0x0c) > 0;
 243                                 bool autoIncrement = (flagData[2] & 0x10) > 0;
 244
 245                                 string tableName = String.Empty;
 246                                 TdsColumnType columnType = (TdsColumnType) Comm.GetByte ();
 247
 248                                 bytesRead += 1;
 249
 250                                 if (columnType == TdsColumnType.Text || columnType == TdsColumnType.Image) {
 251                                         Comm.Skip (4);
 252                                         bytesRead += 4;
 253
 254                                         int tableNameLength = Comm.GetTdsShort ();
 255                                         bytesRead += 2;
 256                                         tableName = Comm.GetString (tableNameLength);
 257                                         bytesRead += tableNameLength;
 258                                         bufLength = 2 << 31 - 1;
 259                                 }
 260                                 else if (columnType == TdsColumnType.Decimal || columnType == TdsColumnType.Numeric) {
 261                                         bufLength = Comm.GetByte ();
 262                                         bytesRead += 1;
 263                                         precision = Comm.GetByte ();
 264                                         bytesRead += 1;
 265                                         scale = Comm.GetByte ();
 266                                         bytesRead += 1;
 267                                 }
 268                                 else if (IsFixedSizeColumn (columnType))
 269                                         bufLength = LookupBufferSize (columnType);
 270                                 else {
 271                                         bufLength = (int) Comm.GetByte () & 0xff;
 272                                         bytesRead += 1;
 273                                 }
 274
 275                                 int index = result.Add (new TdsDataColumn ());
 276                                 result[index]["NumericPrecision"] = precision;
 277                                 result[index]["NumericScale"] = scale;
 278                                 result[index]["ColumnSize"] = bufLength;
 279                                 result[index]["ColumnName"] = ColumnNames[index];
 280                                 result[index]["ColumnType"] = columnType;
 281                                 result[index]["BaseTableName"] = tableName;
 282                                 result[index]["AllowDBNull"] = nullable;
 283                                 result[index]["IsReadOnly"] = !writable;
 284                         }
 285
 286                         return result;
 287                 }
 288
 289                 #endregion // Methods
 290         }
 291 }