| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.client.net.Request |
| 4 | |
| 5 | Copyright (c) 2001, 2005 The Apache Software Foundation or its licensors, where applicable. |
| 6 | |
| 7 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | you may not use this file except in compliance with the License. |
| 9 | You may obtain a copy of the License at |
| 10 | |
| 11 | http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | |
| 13 | Unless required by applicable law or agreed to in writing, software |
| 14 | distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | See the License for the specific language governing permissions and |
| 17 | limitations under the License. |
| 18 | |
| 19 | */ |
| 20 | package org.apache.derby.client.net; |
| 21 | |
| 22 | import org.apache.derby.client.am.DisconnectException; |
| 23 | import org.apache.derby.client.am.EncryptionManager; |
| 24 | import org.apache.derby.client.am.ClientMessageId; |
| 25 | import org.apache.derby.client.am.SqlException; |
| 26 | import org.apache.derby.client.am.Utils; |
| 27 | import org.apache.derby.shared.common.reference.SQLState; |
| 28 | |
| 29 | import java.io.UnsupportedEncodingException; |
| 30 | |
| 31 | public class Request { |
| 32 | |
| 33 | // byte array buffer used for constructing requests. |
| 34 | // currently requests are built starting at the beginning of the buffer. |
| 35 | protected byte[] bytes_; |
| 36 | |
| 37 | // keeps track of the next position to place a byte in the buffer. |
| 38 | // so the last valid byte in the message is at bytes_[offset - 1] |
| 39 | protected int offset_; |
| 40 | |
| 41 | // a stack is used to keep track of offsets into the buffer where 2 byte |
| 42 | // ddm length values are located. these length bytes will be automatically updated |
| 43 | // by this object when construction of a particular object has completed. |
| 44 | // right now the max size of the stack is 10. this is an arbitrary number which |
| 45 | // should be sufficiently large enough to handle all situations. |
| 46 | private final static int MAX_MARKS_NESTING = 10; |
| 47 | private int[] markStack_ = new int[MAX_MARKS_NESTING]; |
| 48 | private int top_ = 0; |
| 49 | |
| 50 | // the ccsid manager for the connection is stored in this object. it will |
| 51 | // be used when constructing character ddm data. it will NOT be used for |
| 52 | // building any FDOCA data. |
| 53 | protected CcsidManager ccsidManager_; |
| 54 | |
| 55 | // This Object tracks the location of the current |
| 56 | // Dss header length bytes. This is done so |
| 57 | // the length bytes can be automatically |
| 58 | // updated as information is added to this stream. |
| 59 | private int dssLengthLocation_ = 0; |
| 60 | |
| 61 | // tracks the request correlation ID to use for commands and command objects. |
| 62 | // this is automatically updated as commands are built and sent to the server. |
| 63 | private int correlationID_ = 0; |
| 64 | |
| 65 | private boolean simpleDssFinalize = false; |
| 66 | |
| 67 | // Used to mask out password when trace is on. |
| 68 | protected boolean passwordIncluded_ = false; |
| 69 | protected int passwordStart_ = 0; |
| 70 | protected int passwordLength_ = 0; |
| 71 | |
| 72 | protected NetAgent netAgent_; |
| 73 | |
| 74 | |
| 75 | // construct a request object specifying the minimum buffer size |
| 76 | // to be used to buffer up the built requests. also specify the ccsid manager |
| 77 | // instance to be used when building ddm character data. |
| 78 | Request(NetAgent netAgent, int minSize, CcsidManager ccsidManager) { |
| 79 | netAgent_ = netAgent; |
| 80 | bytes_ = new byte[minSize]; |
| 81 | ccsidManager_ = ccsidManager; |
| 82 | clearBuffer(); |
| 83 | } |
| 84 | |
| 85 | // construct a request object specifying the ccsid manager instance |
| 86 | // to be used when building ddm character data. This will also create |
| 87 | // a buffer using the default size (see final static DEFAULT_BUFFER_SIZE value). |
| 88 | Request(NetAgent netAgent, CcsidManager ccsidManager, int bufferSize) { |
| 89 | //this (netAgent, Request.DEFAULT_BUFFER_SIZE, ccsidManager); |
| 90 | this(netAgent, bufferSize, ccsidManager); |
| 91 | } |
| 92 | |
| 93 | protected final void clearBuffer() { |
| 94 | offset_ = 0; |
| 95 | top_ = 0; |
| 96 | for (int i = 0; i < markStack_.length; i++) { |
| 97 | if (markStack_[i] != 0) { |
| 98 | markStack_[i] = 0; |
| 99 | } else { |
| 100 | break; |
| 101 | } |
| 102 | } |
| 103 | dssLengthLocation_ = 0; |
| 104 | } |
| 105 | |
| 106 | final void initialize() { |
| 107 | clearBuffer(); |
| 108 | correlationID_ = 0; |
| 109 | } |
| 110 | |
| 111 | // set the ccsid manager value. this method allows the ccsid manager to be |
| 112 | // changed so a request object can be reused by different connections with |
| 113 | // different ccsid managers. |
| 114 | final void setCcsidMgr(CcsidManager ccsidManager) { |
| 115 | ccsidManager_ = ccsidManager; |
| 116 | } |
| 117 | |
| 118 | // ensure length at the end of the buffer for a certain amount of data. |
| 119 | // if the buffer does not contain sufficient room for the data, the buffer |
| 120 | // will be expanded by the larger of (2 * current size) or (current size + length). |
| 121 | // the data from the previous buffer is copied into the larger buffer. |
| 122 | protected final void ensureLength(int length) { |
| 123 | if (length > bytes_.length) { |
| 124 | byte newBytes[] = new byte[Math.max(bytes_.length << 1, length)]; |
| 125 | System.arraycopy(bytes_, 0, newBytes, 0, offset_); |
| 126 | bytes_ = newBytes; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | // creates an request dss in the buffer to contain a ddm command |
| 131 | // object. calling this method means any previous dss objects in |
| 132 | // the buffer are complete and their length and chaining bytes can |
| 133 | // be updated appropriately. |
| 134 | protected final void createCommand() { |
| 135 | buildDss(false, false, false, DssConstants.GDSFMT_RQSDSS, ++correlationID_, false); |
| 136 | } |
| 137 | |
| 138 | // creates an request dss in the buffer to contain a ddm command |
| 139 | // object. calling this method means any previous dss objects in |
| 140 | // the buffer are complete and their length and chaining bytes can |
| 141 | // be updated appropriately. |
| 142 | protected void createXACommand() { |
| 143 | buildDss(false, false, false, DssConstants.GDSFMT_RQSDSS_NOREPLY, ++correlationID_, false); |
| 144 | } |
| 145 | |
| 146 | // creates an object dss in the buffer to contain a ddm command |
| 147 | // data object. calling this method means any previous dss objects in |
| 148 | // the buffer are complete and their length and chaining bytes can |
| 149 | // be updated appropriately. |
| 150 | final void createCommandData() { |
| 151 | buildDss(true, |
| 152 | false, |
| 153 | false, |
| 154 | DssConstants.GDSFMT_OBJDSS, |
| 155 | correlationID_, |
| 156 | false); |
| 157 | } |
| 158 | |
| 159 | final void createEncryptedCommandData() { |
| 160 | if (netAgent_.netConnection_.getSecurityMechanism() == NetConfiguration.SECMEC_EUSRIDDTA || |
| 161 | netAgent_.netConnection_.getSecurityMechanism() == NetConfiguration.SECMEC_EUSRPWDDTA) { |
| 162 | buildDss(true, false, false, DssConstants.GDSFMT_ENCOBJDSS, correlationID_, false); |
| 163 | } else { |
| 164 | buildDss(true, |
| 165 | false, |
| 166 | false, |
| 167 | DssConstants.GDSFMT_OBJDSS, |
| 168 | correlationID_, |
| 169 | false); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | |
| 174 | // experimental lob section |
| 175 | |
| 176 | private final void buildDss(boolean dssHasSameCorrelator, |
| 177 | boolean chainedToNextStructure, |
| 178 | boolean nextHasSameCorrelator, |
| 179 | int dssType, |
| 180 | int corrId, |
| 181 | boolean simpleFinalizeBuildingNextDss) { |
| 182 | if (doesRequestContainData()) { |
| 183 | if (simpleDssFinalize) { |
| 184 | finalizeDssLength(); |
| 185 | } else { |
| 186 | finalizePreviousChainedDss(dssHasSameCorrelator); |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | ensureLength(offset_ + 6); |
| 191 | |
| 192 | // save the length position and skip |
| 193 | // note: the length position is saved so it can be updated |
| 194 | // with a different value later. |
| 195 | dssLengthLocation_ = offset_; |
| 196 | // always turn on chaining flags... this is helpful for lobs... |
| 197 | // these bytes will get rest if dss lengths are finalized. |
| 198 | bytes_[offset_++] = (byte) 0xFF; |
| 199 | bytes_[offset_++] = (byte) 0xFF; |
| 200 | |
| 201 | // insert the manditory 0xD0 and the dssType |
| 202 | bytes_[offset_++] = (byte) 0xD0; |
| 203 | if (chainedToNextStructure) { |
| 204 | dssType |= DssConstants.GDSCHAIN; |
| 205 | if (nextHasSameCorrelator) { |
| 206 | dssType |= DssConstants.GDSCHAIN_SAME_ID; |
| 207 | } |
| 208 | } |
| 209 | bytes_[offset_++] = (byte) (dssType & 0xff); |
| 210 | |
| 211 | // write the request correlation id |
| 212 | // use method that writes a short |
| 213 | bytes_[offset_++] = (byte) ((corrId >>> 8) & 0xff); |
| 214 | bytes_[offset_++] = (byte) (corrId & 0xff); |
| 215 | |
| 216 | simpleDssFinalize = simpleFinalizeBuildingNextDss; |
| 217 | } |
| 218 | |
| 219 | // We need to reuse the agent's sql exception accumulation mechanism |
| 220 | // for this write exception, pad if the length is too big, and truncation if the length is too small |
| 221 | final void writeScalarStream(boolean chained, |
| 222 | boolean chainedWithSameCorrelator, |
| 223 | int codePoint, |
| 224 | int length, |
| 225 | java.io.InputStream in, |
| 226 | boolean writeNullByte, |
| 227 | int parameterIndex) throws DisconnectException, SqlException { |
| 228 | int leftToRead = length; |
| 229 | int extendedLengthByteCount = prepScalarStream(chained, |
| 230 | chainedWithSameCorrelator, |
| 231 | writeNullByte, |
| 232 | leftToRead); |
| 233 | int bytesToRead; |
| 234 | |
| 235 | if (writeNullByte) { |
| 236 | bytesToRead = Utils.min(leftToRead, DssConstants.MAX_DSS_LEN - 6 - 4 - 1 - extendedLengthByteCount); |
| 237 | } else { |
| 238 | bytesToRead = Utils.min(leftToRead, DssConstants.MAX_DSS_LEN - 6 - 4 - extendedLengthByteCount); |
| 239 | } |
| 240 | |
| 241 | if (netAgent_.netConnection_.getSecurityMechanism() == NetConfiguration.SECMEC_EUSRIDDTA || |
| 242 | netAgent_.netConnection_.getSecurityMechanism() == NetConfiguration.SECMEC_EUSRPWDDTA) { |
| 243 | |
| 244 | byte[] lengthAndCodepoint; |
| 245 | lengthAndCodepoint = buildLengthAndCodePointForEncryptedLob(codePoint, |
| 246 | leftToRead, |
| 247 | writeNullByte, |
| 248 | extendedLengthByteCount); |
| 249 | |
| 250 | |
| 251 | |
| 252 | // we need to stream the input, rather than fully materialize it |
| 253 | // write the data |
| 254 | |
| 255 | byte[] clearedBytes = new byte[leftToRead]; |
| 256 | int bytesRead = 0; |
| 257 | int totalBytesRead = 0; |
| 258 | int pos = 0; |
| 259 | do { |
| 260 | try { |
| 261 | bytesRead = in.read(clearedBytes, pos, leftToRead); |
| 262 | totalBytesRead += bytesRead; |
| 263 | } catch (java.io.IOException e) { |
| 264 | padScalarStreamForError(leftToRead, bytesToRead); |
| 265 | // set with SQLSTATE 01004: The value of a string was truncated when assigned to a host variable. |
| 266 | netAgent_.accumulateReadException(new SqlException(netAgent_.logWriter_, |
| 267 | new ClientMessageId(SQLState.NET_IOEXCEPTION_ON_READ), |
| 268 | new Integer(parameterIndex), e.getMessage(), e)); |
| 269 | return; |
| 270 | } |
| 271 | if (bytesRead == -1) { |
| 272 | //padScalarStreamForError(leftToRead, bytesToRead); |
| 273 | // set with SQLSTATE 01004: The value of a string was truncated when assigned to a host variable. |
| 274 | /*throw new SqlException(netAgent_.logWriter_, |
| 275 | "End of Stream prematurely reached while reading InputStream, parameter #" + |
| 276 | parameterIndex + |
| 277 | ". Remaining data has been padded with 0x0.");*/ |
| 278 | //is it OK to do a chain break Exception here. It's not good to |
| 279 | //pad it with 0 and encrypt and send it to the server because it takes too much time |
| 280 | //can't just throw a SQLException either because some of the data PRPSQLSTT etc have already |
| 281 | //been sent to the server, and server is waiting for EXTDTA, server hangs for this. |
| 282 | netAgent_.accumulateChainBreakingReadExceptionAndThrow( |
| 283 | new DisconnectException(netAgent_, |
| 284 | new ClientMessageId(SQLState.NET_PREMATURE_EOS_DISCONNECT), |
| 285 | new Integer(parameterIndex))); |
| 286 | return; |
| 287 | |
| 288 | /*netAgent_.accumulateReadException( |
| 289 | new SqlException(netAgent_.logWriter_, |
| 290 | "End of Stream prematurely reached while reading InputStream, parameter #" + |
| 291 | parameterIndex + |
| 292 | ". Remaining data has been padded with 0x0.")); |
| 293 | return;*/ |
| 294 | } else { |
| 295 | pos += bytesRead; |
| 296 | //offset_ += bytesRead; //comment this out for data stream encryption. |
| 297 | leftToRead -= bytesRead; |
| 298 | } |
| 299 | |
| 300 | } while (leftToRead > 0); |
| 301 | |
| 302 | // check to make sure that the specified length wasn't too small |
| 303 | try { |
| 304 | if (in.read() != -1) { |
| 305 | // set with SQLSTATE 01004: The value of a string was truncated when assigned to a host variable. |
| 306 | netAgent_.accumulateReadException(new SqlException( |
| 307 | netAgent_.logWriter_, |
| 308 | new ClientMessageId(SQLState.NET_INPUTSTREAM_LENGTH_TOO_SMALL), |
| 309 | new Integer(parameterIndex))); |
| 310 | } |
| 311 | } catch (java.io.IOException e) { |
| 312 | netAgent_.accumulateReadException(new SqlException( |
| 313 | netAgent_.logWriter_, |
| 314 | new ClientMessageId( |
| 315 | SQLState.NET_IOEXCEPTION_ON_STREAMLEN_VERIFICATION), |
| 316 | new Integer(parameterIndex), |
| 317 | e.getMessage(), |
| 318 | e)); |
| 319 | } |
| 320 | |
| 321 | byte[] newClearedBytes = new byte[clearedBytes.length + |
| 322 | lengthAndCodepoint.length]; |
| 323 | System.arraycopy(lengthAndCodepoint, 0, newClearedBytes, 0, |
| 324 | lengthAndCodepoint.length); |
| 325 | System.arraycopy(clearedBytes, 0, newClearedBytes, lengthAndCodepoint.length, clearedBytes.length); |
| 326 | //it's wrong here, need to add in the real length after the codepoing 146c |
| 327 | byte[] encryptedBytes; |
| 328 | encryptedBytes = netAgent_.netConnection_.getEncryptionManager(). |
| 329 | encryptData(newClearedBytes, |
| 330 | NetConfiguration.SECMEC_EUSRIDPWD, |
| 331 | netAgent_.netConnection_.getTargetPublicKey(), |
| 332 | netAgent_.netConnection_.getTargetPublicKey()); |
| 333 | |
| 334 | int encryptedBytesLength = encryptedBytes.length; |
| 335 | int sendingLength = bytes_.length - offset_; |
| 336 | if (encryptedBytesLength > (bytes_.length - offset_)) { |
| 337 | |
| 338 | System.arraycopy(encryptedBytes, 0, bytes_, offset_, (bytes_.length - offset_)); |
| 339 | offset_ = 32767; |
| 340 | try { |
| 341 | sendBytes(netAgent_.getOutputStream()); |
| 342 | } catch (java.io.IOException ioe) { |
| 343 | netAgent_.throwCommunicationsFailure(ioe); |
| 344 | } |
| 345 | } else { |
| 346 | System.arraycopy(encryptedBytes, 0, bytes_, offset_, encryptedBytesLength); |
| 347 | offset_ = offset_ + encryptedBytes.length; |
| 348 | } |
| 349 | |
| 350 | encryptedBytesLength = encryptedBytesLength - sendingLength; |
| 351 | while (encryptedBytesLength > 0) { |
| 352 | //dssLengthLocation_ = offset_; |
| 353 | offset_ = 0; |
| 354 | |
| 355 | if ((encryptedBytesLength - 32765) > 0) { |
| 356 | bytes_[offset_++] = (byte) (0xff); |
| 357 | bytes_[offset_++] = (byte) (0xff); |
| 358 | System.arraycopy(encryptedBytes, sendingLength, bytes_, offset_, 32765); |
| 359 | encryptedBytesLength -= 32765; |
| 360 | sendingLength += 32765; |
| 361 | offset_ = 32767; |
| 362 | try { |
| 363 | sendBytes(netAgent_.getOutputStream()); |
| 364 | } catch (java.io.IOException ioe) { |
| 365 | netAgent_.throwCommunicationsFailure(ioe); |
| 366 | } |
| 367 | } else { |
| 368 | int leftlength = encryptedBytesLength + 2; |
| 369 | bytes_[offset_++] = (byte) ((leftlength >>> 8) & 0xff); |
| 370 | bytes_[offset_++] = (byte) (leftlength & 0xff); |
| 371 | |
| 372 | System.arraycopy(encryptedBytes, sendingLength, bytes_, offset_, encryptedBytesLength); |
| 373 | |
| 374 | offset_ += encryptedBytesLength; |
| 375 | dssLengthLocation_ = offset_; |
| 376 | encryptedBytesLength = 0; |
| 377 | } |
| 378 | |
| 379 | } |
| 380 | } else //if not data strteam encryption |
| 381 | { |
| 382 | buildLengthAndCodePointForLob(codePoint, |
| 383 | leftToRead, |
| 384 | writeNullByte, |
| 385 | extendedLengthByteCount); |
| 386 | |
| 387 | int bytesRead = 0; |
| 388 | int totalBytesRead = 0; |
| 389 | do { |
| 390 | do { |
| 391 | try { |
| 392 | bytesRead = in.read(bytes_, offset_, bytesToRead); |
| 393 | totalBytesRead += bytesRead; |
| 394 | } catch (java.io.IOException e) { |
| 395 | padScalarStreamForError(leftToRead, bytesToRead); |
| 396 | // set with SQLSTATE 01004: The value of a string was truncated when assigned to a host variable. |
| 397 | netAgent_.accumulateReadException(new SqlException( |
| 398 | netAgent_.logWriter_, |
| 399 | new ClientMessageId(SQLState.NET_IOEXCEPTION_ON_READ), |
| 400 | new Integer(parameterIndex), |
| 401 | e.getMessage(), |
| 402 | e)); |
| 403 | |
| 404 | return; |
| 405 | } |
| 406 | if (bytesRead == -1) { |
| 407 | padScalarStreamForError(leftToRead, bytesToRead); |
| 408 | // set with SQLSTATE 01004: The value of a string was truncated when assigned to a host variable. |
| 409 | netAgent_.accumulateReadException(new SqlException(netAgent_.logWriter_, |
| 410 | new ClientMessageId(SQLState.NET_PREMATURE_EOS), |
| 411 | new Integer(parameterIndex))); |
| 412 | return; |
| 413 | } else { |
| 414 | bytesToRead -= bytesRead; |
| 415 | offset_ += bytesRead; |
| 416 | leftToRead -= bytesRead; |
| 417 | } |
| 418 | } while (bytesToRead > 0); |
| 419 | |
| 420 | bytesToRead = flushScalarStreamSegment(leftToRead, bytesToRead); |
| 421 | } while (leftToRead > 0); |
| 422 | |
| 423 | // check to make sure that the specified length wasn't too small |
| 424 | try { |
| 425 | if (in.read() != -1) { |
| 426 | // set with SQLSTATE 01004: The value of a string was truncated when assigned to a host variable. |
| 427 | netAgent_.accumulateReadException(new SqlException(netAgent_.logWriter_, |
| 428 | new ClientMessageId(SQLState.NET_INPUTSTREAM_LENGTH_TOO_SMALL), |
| 429 | new Integer(parameterIndex))); |
| 430 | } |
| 431 | } catch (java.io.IOException e) { |
| 432 | netAgent_.accumulateReadException(new SqlException( |
| 433 | netAgent_.logWriter_, |
| 434 | new ClientMessageId( |
| 435 | SQLState.NET_IOEXCEPTION_ON_STREAMLEN_VERIFICATION), |
| 436 | new Integer(parameterIndex), |
| 437 | e.getMessage(), |
| 438 | e)); |
| 439 | } |
| 440 | |
| 441 | } |
| 442 | |
| 443 | |
| 444 | } |
| 445 | |
| 446 | // Throw DataTruncation, instead of closing connection if input size mismatches |
| 447 | // An implication of this, is that we need to extend the chaining model |
| 448 | // for writes to accomodate chained write exceptoins |
| 449 | final void writeScalarStream(boolean chained, |
| 450 | boolean chainedWithSameCorrelator, |
| 451 | int codePoint, |
| 452 | int length, |
| 453 | java.io.Reader r, |
| 454 | boolean writeNullByte, |
| 455 | int parameterIndex) throws DisconnectException, |
| 456 | SqlException{ |
| 457 | |
| 458 | writeScalarStream(chained, |
| 459 | chainedWithSameCorrelator, |
| 460 | codePoint, |
| 461 | length * 2, |
| 462 | new UTF32BEEncodedInputStream( r ), |
| 463 | writeNullByte, |
| 464 | parameterIndex); |
| 465 | } |
| 466 | |
| 467 | |
| 468 | // prepScalarStream does the following prep for writing stream data: |
| 469 | // 1. Flushes an existing DSS segment, if necessary |
| 470 | // 2. Determines if extended length bytes are needed |
| 471 | // 3. Creates a new DSS/DDM header and a null byte indicator, if applicable |
| 472 | protected final int prepScalarStream(boolean chained, |
| 473 | boolean chainedWithSameCorrelator, |
| 474 | boolean writeNullByte, |
| 475 | int leftToRead) throws DisconnectException { |
| 476 | int extendedLengthByteCount; |
| 477 | |
| 478 | int nullIndicatorSize = 0; |
| 479 | if (writeNullByte) { |
| 480 | // leftToRead is cast to (long) on the off chance that +4+1 pushes it outside the range of int |
| 481 | extendedLengthByteCount = calculateExtendedLengthByteCount((long) leftToRead + 4 + 1); |
| 482 | nullIndicatorSize = 1; |
| 483 | } else { |
| 484 | extendedLengthByteCount = calculateExtendedLengthByteCount(leftToRead + 4); |
| 485 | } |
| 486 | |
| 487 | // flush the existing DSS segment if this stream will not fit in the send buffer |
| 488 | // leftToRead is cast to (long) on the off chance that +4+1 pushes it outside the range of int |
| 489 | if (10 + extendedLengthByteCount + nullIndicatorSize + (long) leftToRead + offset_ > DssConstants.MAX_DSS_LEN) { |
| 490 | try { |
| 491 | if (simpleDssFinalize) { |
| 492 | finalizeDssLength(); |
| 493 | } else { |
| 494 | finalizePreviousChainedDss(true); |
| 495 | } |
| 496 | sendBytes(netAgent_.getOutputStream()); |
| 497 | } catch (java.io.IOException e) { |
| 498 | netAgent_.throwCommunicationsFailure(e); |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | if (netAgent_.netConnection_.getSecurityMechanism() == NetConfiguration.SECMEC_EUSRIDDTA || |
| 503 | netAgent_.netConnection_.getSecurityMechanism() == NetConfiguration.SECMEC_EUSRPWDDTA) { |
| 504 | buildDss(true, |
| 505 | chained, |
| 506 | chainedWithSameCorrelator, |
| 507 | DssConstants.GDSFMT_ENCOBJDSS, |
| 508 | correlationID_, |
| 509 | true); |
| 510 | } else |
| 511 | // buildDss should not call ensure length. |
| 512 | { |
| 513 | buildDss(true, |
| 514 | chained, |
| 515 | chainedWithSameCorrelator, |
| 516 | DssConstants.GDSFMT_OBJDSS, |
| 517 | correlationID_, |
| 518 | true); |
| 519 | } |
| 520 | |
| 521 | return extendedLengthByteCount; |
| 522 | } |
| 523 | |
| 524 | |
| 525 | // Writes out a scalar stream DSS segment, along with DSS continuation headers, |
| 526 | // if necessary. |
| 527 | protected final int flushScalarStreamSegment(int leftToRead, |
| 528 | int bytesToRead) throws DisconnectException { |
| 529 | int newBytesToRead = bytesToRead; |
| 530 | |
| 531 | // either at end of data, end of dss segment, or both. |
| 532 | if (leftToRead != 0) { |
| 533 | // 32k segment filled and not at end of data. |
| 534 | if ((Utils.min(2 + leftToRead, 32767)) > (bytes_.length - offset_)) { |
| 535 | try { |
| 536 | sendBytes(netAgent_.getOutputStream()); |
| 537 | } catch (java.io.IOException ioe) { |
| 538 | netAgent_.throwCommunicationsFailure(ioe); |
| 539 | } |
| 540 | } |
| 541 | dssLengthLocation_ = offset_; |
| 542 | bytes_[offset_++] = (byte) (0xff); |
| 543 | bytes_[offset_++] = (byte) (0xff); |
| 544 | newBytesToRead = Utils.min(leftToRead, 32765); |
| 545 | } |
| 546 | |
| 547 | return newBytesToRead; |
| 548 | } |
| 549 | |
| 550 | // the offset_ must not be updated when an error is encountered |
| 551 | // note valid data may be overwritten |
| 552 | protected final void padScalarStreamForError(int leftToRead, int bytesToRead) throws DisconnectException { |
| 553 | do { |
| 554 | do { |
| 555 | bytes_[offset_++] = (byte) (0x0); // use 0x0 as the padding byte |
| 556 | bytesToRead--; |
| 557 | leftToRead--; |
| 558 | } while (bytesToRead > 0); |
| 559 | |
| 560 | bytesToRead = flushScalarStreamSegment(leftToRead, bytesToRead); |
| 561 | } while (leftToRead > 0); |
| 562 | } |
| 563 | |
| 564 | private final void writeExtendedLengthBytes(int extendedLengthByteCount, long length) { |
| 565 | int shiftSize = (extendedLengthByteCount - 1) * 8; |
| 566 | for (int i = 0; i < extendedLengthByteCount; i++) { |
| 567 | bytes_[offset_++] = (byte) ((length >>> shiftSize) & 0xff); |
| 568 | shiftSize -= 8; |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | private final byte[] writeExtendedLengthBytesForEncryption(int extendedLengthByteCount, long length) { |
| 573 | int shiftSize = (extendedLengthByteCount - 1) * 8; |
| 574 | byte[] extendedLengthBytes = new byte[extendedLengthByteCount]; |
| 575 | for (int i = 0; i < extendedLengthByteCount; i++) { |
| 576 | extendedLengthBytes[i] = (byte) ((length >>> shiftSize) & 0xff); |
| 577 | shiftSize -= 8; |
| 578 | } |
| 579 | return extendedLengthBytes; |
| 580 | } |
| 581 | |
| 582 | // experimental lob section - end |
| 583 | |
| 584 | // used to finialize a dss which is already in the buffer |
| 585 | // before another dss is built. this includes updating length |
| 586 | // bytes and chaining bits. |
| 587 | protected final void finalizePreviousChainedDss(boolean dssHasSameCorrelator) { |
| 588 | finalizeDssLength(); |
| 589 | bytes_[dssLengthLocation_ + 3] |= 0x40; |
| 590 | if (dssHasSameCorrelator) // for blobs |
| 591 | { |
| 592 | bytes_[dssLengthLocation_ + 3] |= 0x10; |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | // method to determine if any data is in the request. |
| 597 | // this indicates there is a dss object already in the buffer. |
| 598 | protected final boolean doesRequestContainData() { |
| 599 | return offset_ != 0; |
| 600 | } |
| 601 | |
| 602 | // signal the completion of a Dss Layer A object. The length of |
| 603 | // dss object will be calculated based on the difference between the |
| 604 | // start of the dss, saved on the beginDss call, and the current |
| 605 | // offset into the buffer which marks the end of the data. In the event |
| 606 | // the length requires the use of continuation Dss headers, one for each 32k |
| 607 | // chunk of data, the data will be shifted and the continuation headers |
| 608 | // will be inserted with the correct values as needed. |
| 609 | // Note: In the future, we may try to optimize this approach |
| 610 | // in an attempt to avoid these shifts. |
| 611 | protected final void finalizeDssLength() { |
| 612 | // calculate the total size of the dss and the number of bytes which would |
| 613 | // require continuation dss headers. The total length already includes the |
| 614 | // the 6 byte dss header located at the beginning of the dss. It does not |
| 615 | // include the length of any continuation headers. |
| 616 | int totalSize = offset_ - dssLengthLocation_; |
| 617 | int bytesRequiringContDssHeader = totalSize - 32767; |
| 618 | |
| 619 | // determine if continuation headers are needed |
| 620 | if (bytesRequiringContDssHeader > 0) { |
| 621 | |
| 622 | // the continuation headers are needed, so calculate how many. |
| 623 | // after the first 32767 worth of data, a continuation header is |
| 624 | // needed for every 32765 bytes (32765 bytes of data + 2 bytes of |
| 625 | // continuation header = 32767 Dss Max Size). |
| 626 | int contDssHeaderCount = bytesRequiringContDssHeader / 32765; |
| 627 | if (bytesRequiringContDssHeader % 32765 != 0) { |
| 628 | contDssHeaderCount++; |
| 629 | } |
| 630 | |
| 631 | // right now the code will shift to the right. In the future we may want |
| 632 | // to try something fancier to help reduce the copying (maybe keep |
| 633 | // space in the beginning of the buffer??). |
| 634 | // the offset points to the next available offset in the buffer to place |
| 635 | // a piece of data, so the last dataByte is at offset -1. |
| 636 | // various bytes will need to be shifted by different amounts |
| 637 | // depending on how many dss headers to insert so the amount to shift |
| 638 | // will be calculated and adjusted as needed. ensure there is enough room |
| 639 | // for all the conutinuation headers and adjust the offset to point to the |
| 640 | // new end of the data. |
| 641 | int dataByte = offset_ - 1; |
| 642 | int shiftOffset = contDssHeaderCount * 2; |
| 643 | ensureLength(offset_ + shiftOffset); |
| 644 | offset_ += shiftOffset; |
| 645 | |
| 646 | // mark passOne to help with calculating the length of the final (first or |
| 647 | // rightmost) continuation header. |
| 648 | boolean passOne = true; |
| 649 | do { |
| 650 | // calculate chunk of data to shift |
| 651 | int dataToShift = bytesRequiringContDssHeader % 32765; |
| 652 | if (dataToShift == 0) { |
| 653 | dataToShift = 32765; |
| 654 | } |
| 655 | |
| 656 | // perform the shift |
| 657 | dataByte -= dataToShift; |
| 658 | System.arraycopy(bytes_, dataByte + 1,bytes_, dataByte + shiftOffset + 1, dataToShift); |
| 659 | |
| 660 | // calculate the value the value of the 2 byte continuation dss header which |
| 661 | // includes the length of itself. On the first pass, if the length is 32767 |
| 662 | // we do not want to set the continuation dss header flag. |
| 663 | int twoByteContDssHeader = dataToShift + 2; |
| 664 | if (passOne) { |
| 665 | passOne = false; |
| 666 | } else { |
| 667 | if (twoByteContDssHeader == 32767) { |
| 668 | twoByteContDssHeader = 0xFFFF; |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | // insert the header's length bytes |
| 673 | bytes_[dataByte + shiftOffset - 1] = (byte) ((twoByteContDssHeader >>> 8) & 0xff); |
| 674 | bytes_[dataByte + shiftOffset] = (byte) (twoByteContDssHeader & 0xff); |
| 675 | |
| 676 | // adjust the bytesRequiringContDssHeader and the amount to shift for |
| 677 | // data in upstream headers. |
| 678 | bytesRequiringContDssHeader -= dataToShift; |
| 679 | shiftOffset -= 2; |
| 680 | |
| 681 | // shift and insert another header for more data. |
| 682 | } while (bytesRequiringContDssHeader > 0); |
| 683 | |
| 684 | // set the continuation dss header flag on for the first header |
| 685 | totalSize = 0xFFFF; |
| 686 | |
| 687 | } |
| 688 | |
| 689 | // insert the length bytes in the 6 byte dss header. |
| 690 | bytes_[dssLengthLocation_] = (byte) ((totalSize >>> 8) & 0xff); |
| 691 | bytes_[dssLengthLocation_ + 1] = (byte) (totalSize & 0xff); |
| 692 | } |
| 693 | |
| 694 | // mark the location of a two byte ddm length field in the buffer, |
| 695 | // skip the length bytes for later update, and insert a ddm codepoint |
| 696 | // into the buffer. The value of the codepoint is not checked. |
| 697 | // this length will be automatically updated when construction of |
| 698 | // the ddm object is complete (see updateLengthBytes method). |
| 699 | // Note: this mechanism handles extended length ddms. |
| 700 | protected final void markLengthBytes(int codePoint) { |
| 701 | ensureLength(offset_ + 4); |
| 702 | |
| 703 | // save the location of length bytes in the mark stack. |
| 704 | mark(); |
| 705 | |
| 706 | // skip the length bytes and insert the codepoint |
| 707 | offset_ += 2; |
| 708 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 709 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 710 | } |
| 711 | |
| 712 | // mark an offest into the buffer by placing the current offset value on |
| 713 | // a stack. |
| 714 | private final void mark() { |
| 715 | markStack_[top_++] = offset_; |
| 716 | } |
| 717 | |
| 718 | // remove and return the top offset value from mark stack. |
| 719 | private final int popMark() { |
| 720 | return markStack_[--top_]; |
| 721 | } |
| 722 | |
| 723 | protected final void markForCachingPKGNAMCSN() { |
| 724 | mark(); |
| 725 | } |
| 726 | |
| 727 | protected final int popMarkForCachingPKGNAMCSN() { |
| 728 | return popMark(); |
| 729 | } |
| 730 | |
| 731 | // Called to update the last ddm length bytes marked (lengths are updated |
| 732 | // in the reverse order that they are marked). It is up to the caller |
| 733 | // to make sure length bytes were marked before calling this method. |
| 734 | // If the length requires ddm extended length bytes, the data will be |
| 735 | // shifted as needed and the extended length bytes will be automatically |
| 736 | // inserted. |
| 737 | protected final void updateLengthBytes() throws SqlException { |
| 738 | // remove the top length location offset from the mark stack\ |
| 739 | // calculate the length based on the marked location and end of data. |
| 740 | int lengthLocation = popMark(); |
| 741 | int length = offset_ - lengthLocation; |
| 742 | |
| 743 | // determine if any extended length bytes are needed. the value returned |
| 744 | // from calculateExtendedLengthByteCount is the number of extended length |
| 745 | // bytes required. 0 indicates no exteneded length. |
| 746 | int extendedLengthByteCount = calculateExtendedLengthByteCount(length); |
| 747 | if (extendedLengthByteCount != 0) { |
| 748 | |
| 749 | // ensure there is enough room in the buffer for the extended length bytes. |
| 750 | ensureLength(offset_ + extendedLengthByteCount); |
| 751 | |
| 752 | // calculate the length to be placed in the extended length bytes. |
| 753 | // this length does not include the 4 byte llcp. |
| 754 | int extendedLength = length - 4; |
| 755 | |
| 756 | // shift the data to the right by the number of extended length bytes needed. |
| 757 | int extendedLengthLocation = lengthLocation + 4; |
| 758 | System.arraycopy(bytes_, |
| 759 | extendedLengthLocation, |
| 760 | bytes_, |
| 761 | extendedLengthLocation + extendedLengthByteCount, |
| 762 | extendedLength); |
| 763 | |
| 764 | // write the extended length |
| 765 | int shiftSize = (extendedLengthByteCount - 1) * 8; |
| 766 | for (int i = 0; i < extendedLengthByteCount; i++) { |
| 767 | bytes_[extendedLengthLocation++] = (byte) ((extendedLength >>> shiftSize) & 0xff); |
| 768 | shiftSize -= 8; |
| 769 | } |
| 770 | // adjust the offset to account for the shift and insert |
| 771 | offset_ += extendedLengthByteCount; |
| 772 | |
| 773 | // the two byte length field before the codepoint contains the length |
| 774 | // of itself, the length of the codepoint, and the number of bytes used |
| 775 | // to hold the extended length. the 2 byte length field also has the first |
| 776 | // bit on to indicate extended length bytes were used. |
| 777 | length = extendedLengthByteCount + 4; |
| 778 | length |= 0x8000; |
| 779 | } |
| 780 | |
| 781 | // write the 2 byte length field (2 bytes before codepoint). |
| 782 | bytes_[lengthLocation] = (byte) ((length >>> 8) & 0xff); |
| 783 | bytes_[lengthLocation + 1] = (byte) (length & 0xff); |
| 784 | } |
| 785 | |
| 786 | // helper method to calculate the minimum number of extended length bytes needed |
| 787 | // for a ddm. a return value of 0 indicates no extended length needed. |
| 788 | private final int calculateExtendedLengthByteCount(long ddmSize) //throws SqlException |
| 789 | { |
| 790 | // according to Jim and some tests perfomred on Lob data, |
| 791 | // the extended length bytes are signed. Assume that |
| 792 | // if this is the case for Lobs, it is the case for |
| 793 | // all extended length scenarios. |
| 794 | if (ddmSize <= 0x7FFF) { |
| 795 | return 0; |
| 796 | } else if (ddmSize <= 0x7FFFFFFFL) { |
| 797 | return 4; |
| 798 | } else if (ddmSize <= 0x7FFFFFFFFFFFL) { |
| 799 | return 6; |
| 800 | } else { |
| 801 | return 8; |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | // insert the padByte into the buffer by length number of times. |
| 806 | final void padBytes(byte padByte, int length) { |
| 807 | ensureLength(offset_ + length); |
| 808 | for (int i = 0; i < length; i++) { |
| 809 | bytes_[offset_++] = padByte; |
| 810 | } |
| 811 | } |
| 812 | |
| 813 | // insert an unsigned single byte value into the buffer. |
| 814 | final void write1Byte(int value) { |
| 815 | ensureLength(offset_ + 1); |
| 816 | bytes_[offset_++] = (byte) (value & 0xff); |
| 817 | } |
| 818 | |
| 819 | // insert 3 unsigned bytes into the buffer. this was |
| 820 | // moved up from NetStatementRequest for performance |
| 821 | final void buildTripletHeader(int tripletLength, |
| 822 | int tripletType, |
| 823 | int tripletId) { |
| 824 | ensureLength(offset_ + 3); |
| 825 | bytes_[offset_++] = (byte) (tripletLength & 0xff); |
| 826 | bytes_[offset_++] = (byte) (tripletType & 0xff); |
| 827 | bytes_[offset_++] = (byte) (tripletId & 0xff); |
| 828 | } |
| 829 | |
| 830 | final void writeLidAndLengths(int[][] lidAndLengthOverrides, int count, int offset) { |
| 831 | ensureLength(offset_ + (count * 3)); |
| 832 | for (int i = 0; i < count; i++, offset++) { |
| 833 | bytes_[offset_++] = (byte) (lidAndLengthOverrides[offset][0] & 0xff); |
| 834 | bytes_[offset_++] = (byte) ((lidAndLengthOverrides[offset][1] >>> 8) & 0xff); |
| 835 | bytes_[offset_++] = (byte) (lidAndLengthOverrides[offset][1] & 0xff); |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | // if mdd overrides are not required, lids and lengths are copied straight into the |
| 840 | // buffer. |
| 841 | // otherwise, lookup the protocolType in the map. if an entry exists, substitute the |
| 842 | // protocolType with the corresponding override lid. |
| 843 | final void writeLidAndLengths(int[][] lidAndLengthOverrides, |
| 844 | int count, |
| 845 | int offset, |
| 846 | boolean mddRequired, |
| 847 | java.util.Hashtable map) { |
| 848 | if (!mddRequired) { |
| 849 | writeLidAndLengths(lidAndLengthOverrides, count, offset); |
| 850 | } |
| 851 | // if mdd overrides are required, lookup the protocolType in the map, and substitute |
| 852 | // the protocolType with the override lid. |
| 853 | else { |
| 854 | ensureLength(offset_ + (count * 3)); |
| 855 | int protocolType, overrideLid; |
| 856 | Object entry; |
| 857 | for (int i = 0; i < count; i++, offset++) { |
| 858 | protocolType = lidAndLengthOverrides[offset][0]; |
| 859 | // lookup the protocolType in the protocolType->overrideLid map |
| 860 | // if an entry exists, replace the protocolType with the overrideLid |
| 861 | entry = map.get(new Integer(protocolType)); |
| 862 | overrideLid = (entry == null) ? protocolType : ((Integer) entry).intValue(); |
| 863 | bytes_[offset_++] = (byte) (overrideLid & 0xff); |
| 864 | bytes_[offset_++] = (byte) ((lidAndLengthOverrides[offset][1] >>> 8) & 0xff); |
| 865 | bytes_[offset_++] = (byte) (lidAndLengthOverrides[offset][1] & 0xff); |
| 866 | } |
| 867 | } |
| 868 | } |
| 869 | |
| 870 | // perf end |
| 871 | |
| 872 | // insert a big endian unsigned 2 byte value into the buffer. |
| 873 | final void write2Bytes(int value) { |
| 874 | ensureLength(offset_ + 2); |
| 875 | bytes_[offset_++] = (byte) ((value >>> 8) & 0xff); |
| 876 | bytes_[offset_++] = (byte) (value & 0xff); |
| 877 | } |
| 878 | |
| 879 | // insert a big endian unsigned 4 byte value into the buffer. |
| 880 | final void write4Bytes(long value) { |
| 881 | ensureLength(offset_ + 4); |
| 882 | bytes_[offset_++] = (byte) ((value >>> 24) & 0xff); |
| 883 | bytes_[offset_++] = (byte) ((value >>> 16) & 0xff); |
| 884 | bytes_[offset_++] = (byte) ((value >>> 8) & 0xff); |
| 885 | bytes_[offset_++] = (byte) (value & 0xff); |
| 886 | } |
| 887 | |
| 888 | // copy length number of bytes starting at offset 0 of the byte array, buf, |
| 889 | // into the buffer. it is up to the caller to make sure buf has at least length |
| 890 | // number of elements. no checking will be done by this method. |
| 891 | final void writeBytes(byte[] buf, int length) { |
| 892 | ensureLength(offset_ + length); |
| 893 | System.arraycopy(buf, 0, bytes_, offset_, length); |
| 894 | offset_ += length; |
| 895 | } |
| 896 | |
| 897 | final void writeBytes(byte[] buf) { |
| 898 | ensureLength(offset_ + buf.length); |
| 899 | System.arraycopy(buf, 0, bytes_, offset_, buf.length); |
| 900 | offset_ += buf.length; |
| 901 | } |
| 902 | |
| 903 | // insert a pair of unsigned 2 byte values into the buffer. |
| 904 | final void writeCodePoint4Bytes(int codePoint, int value) { // should this be writeCodePoint2Bytes |
| 905 | ensureLength(offset_ + 4); |
| 906 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 907 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 908 | bytes_[offset_++] = (byte) ((value >>> 8) & 0xff); |
| 909 | bytes_[offset_++] = (byte) (value & 0xff); |
| 910 | } |
| 911 | |
| 912 | // insert a 4 byte length/codepoint pair and a 1 byte unsigned value into the buffer. |
| 913 | // total of 5 bytes inserted in buffer. |
| 914 | protected final void writeScalar1Byte(int codePoint, int value) { |
| 915 | ensureLength(offset_ + 5); |
| 916 | bytes_[offset_++] = 0x00; |
| 917 | bytes_[offset_++] = 0x05; |
| 918 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 919 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 920 | bytes_[offset_++] = (byte) (value & 0xff); |
| 921 | } |
| 922 | |
| 923 | // insert a 4 byte length/codepoint pair and a 2 byte unsigned value into the buffer. |
| 924 | // total of 6 bytes inserted in buffer. |
| 925 | final void writeScalar2Bytes(int codePoint, int value) { |
| 926 | ensureLength(offset_ + 6); |
| 927 | bytes_[offset_++] = 0x00; |
| 928 | bytes_[offset_++] = 0x06; |
| 929 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 930 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 931 | bytes_[offset_++] = (byte) ((value >>> 8) & 0xff); |
| 932 | bytes_[offset_++] = (byte) (value & 0xff); |
| 933 | } |
| 934 | |
| 935 | // insert a 4 byte length/codepoint pair and a 4 byte unsigned value into the |
| 936 | // buffer. total of 8 bytes inserted in the buffer. |
| 937 | protected final void writeScalar4Bytes(int codePoint, long value) { |
| 938 | ensureLength(offset_ + 8); |
| 939 | bytes_[offset_++] = 0x00; |
| 940 | bytes_[offset_++] = 0x08; |
| 941 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 942 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 943 | bytes_[offset_++] = (byte) ((value >>> 24) & 0xff); |
| 944 | bytes_[offset_++] = (byte) ((value >>> 16) & 0xff); |
| 945 | bytes_[offset_++] = (byte) ((value >>> 8) & 0xff); |
| 946 | bytes_[offset_++] = (byte) (value & 0xff); |
| 947 | } |
| 948 | |
| 949 | // insert a 4 byte length/codepoint pair and a 8 byte unsigned value into the |
| 950 | // buffer. total of 12 bytes inserted in the buffer. |
| 951 | final void writeScalar8Bytes(int codePoint, long value) { |
| 952 | ensureLength(offset_ + 12); |
| 953 | bytes_[offset_++] = 0x00; |
| 954 | bytes_[offset_++] = 0x0C; |
| 955 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 956 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 957 | bytes_[offset_++] = (byte) ((value >>> 56) & 0xff); |
| 958 | bytes_[offset_++] = (byte) ((value >>> 48) & 0xff); |
| 959 | bytes_[offset_++] = (byte) ((value >>> 40) & 0xff); |
| 960 | bytes_[offset_++] = (byte) ((value >>> 32) & 0xff); |
| 961 | bytes_[offset_++] = (byte) ((value >>> 24) & 0xff); |
| 962 | bytes_[offset_++] = (byte) ((value >>> 16) & 0xff); |
| 963 | bytes_[offset_++] = (byte) ((value >>> 8) & 0xff); |
| 964 | bytes_[offset_++] = (byte) (value & 0xff); |
| 965 | } |
| 966 | |
| 967 | // insert a 4 byte length/codepoint pair into the buffer. |
| 968 | // total of 4 bytes inserted in buffer. |
| 969 | // Note: the length value inserted in the buffer is the same as the value |
| 970 | // passed in as an argument (this value is NOT incremented by 4 before being |
| 971 | // inserted). |
| 972 | final void writeLengthCodePoint(int length, int codePoint) { |
| 973 | ensureLength(offset_ + 4); |
| 974 | bytes_[offset_++] = (byte) ((length >>> 8) & 0xff); |
| 975 | bytes_[offset_++] = (byte) (length & 0xff); |
| 976 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 977 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 978 | } |
| 979 | |
| 980 | final byte[] writeEXTDTALengthCodePointForEncryption(int length, int codePoint) { |
| 981 | //how to encure length and offset later? |
| 982 | byte[] clearedBytes = new byte[4]; |
| 983 | clearedBytes[0] = (byte) ((length >>> 8) & 0xff); |
| 984 | clearedBytes[1] = (byte) (length & 0xff); |
| 985 | clearedBytes[2] = (byte) ((codePoint >>> 8) & 0xff); |
| 986 | clearedBytes[3] = (byte) (codePoint & 0xff); |
| 987 | return clearedBytes; |
| 988 | } |
| 989 | |
| 990 | // insert a 4 byte length/codepoint pair into the buffer followed |
| 991 | // by length number of bytes copied from array buf starting at offset 0. |
| 992 | // the length of this scalar must not exceed the max for the two byte length |
| 993 | // field. This method does not support extended length. The length |
| 994 | // value inserted in the buffer includes the number of bytes to copy plus |
| 995 | // the size of the llcp (or length + 4). It is up to the caller to make sure |
| 996 | // the array, buf, contains at least length number of bytes. |
| 997 | final void writeScalarBytes(int codePoint, byte[] buf, int length) { |
| 998 | ensureLength(offset_ + length + 4); |
| 999 | bytes_[offset_++] = (byte) (((length + 4) >>> 8) & 0xff); |
| 1000 | bytes_[offset_++] = (byte) ((length + 4) & 0xff); |
| 1001 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 1002 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 1003 | for (int i = 0; i < length; i++) { |
| 1004 | bytes_[offset_++] = buf[i]; |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | // insert a 4 byte length/codepoint pair into the buffer. |
| 1009 | // total of 4 bytes inserted in buffer. |
| 1010 | // Note: datalength will be incremented by the size of the llcp, 4, |
| 1011 | // before being inserted. |
| 1012 | final void writeScalarHeader(int codePoint, int dataLength) { |
| 1013 | ensureLength(offset_ + dataLength + 4); |
| 1014 | bytes_[offset_++] = (byte) (((dataLength + 4) >>> 8) & 0xff); |
| 1015 | bytes_[offset_++] = (byte) ((dataLength + 4) & 0xff); |
| 1016 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 1017 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 1018 | } |
| 1019 | |
| 1020 | // insert a 4 byte length/codepoint pair plus ddm character data into |
| 1021 | // the buffer. This method assumes that the String argument can be |
| 1022 | // converted by the ccsid manager. This should be fine because usually |
| 1023 | // there are restrictions on the characters which can be used for ddm |
| 1024 | // character data. This method also assumes that the string.length() will |
| 1025 | // be the number of bytes following the conversion. |
| 1026 | // The two byte length field will contain the length of the character data |
| 1027 | // and the length of the 4 byte llcp. This method does not handle |
| 1028 | // scenarios which require extended length bytes. |
| 1029 | final void writeScalarString(int codePoint, String string) throws SqlException { |
| 1030 | int stringLength = string.length(); |
| 1031 | ensureLength(offset_ + stringLength + 4); |
| 1032 | bytes_[offset_++] = (byte) (((stringLength + 4) >>> 8) & 0xff); |
| 1033 | bytes_[offset_++] = (byte) ((stringLength + 4) & 0xff); |
| 1034 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 1035 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 1036 | offset_ = ccsidManager_.convertFromUCS2(string, bytes_, offset_, netAgent_); |
| 1037 | } |
| 1038 | |
| 1039 | // insert a 4 byte length/codepoint pair plus ddm character data into the |
| 1040 | // buffer. The ddm character data is padded if needed with the ccsid manager's |
| 1041 | // space character if the length of the character data is less than paddedLength. |
| 1042 | // Note: this method is not to be used for String truncation and the string length |
| 1043 | // must be <= paddedLength. |
| 1044 | // This method assumes that the String argument can be |
| 1045 | // converted by the ccsid manager. This should be fine because usually |
| 1046 | // there are restrictions on the characters which can be used for ddm |
| 1047 | // character data. This method also assumes that the string.length() will |
| 1048 | // be the number of bytes following the conversion. The two byte length field |
| 1049 | // of the llcp will contain the length of the character data including the pad |
| 1050 | // and the length of the llcp or 4. This method will not handle extended length |
| 1051 | // scenarios. |
| 1052 | final void writeScalarPaddedString(int codePoint, String string, int paddedLength) throws SqlException { |
| 1053 | int stringLength = string.length(); |
| 1054 | ensureLength(offset_ + paddedLength + 4); |
| 1055 | bytes_[offset_++] = (byte) (((paddedLength + 4) >>> 8) & 0xff); |
| 1056 | bytes_[offset_++] = (byte) ((paddedLength + 4) & 0xff); |
| 1057 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 1058 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 1059 | offset_ = ccsidManager_.convertFromUCS2(string, bytes_, offset_, netAgent_); |
| 1060 | for (int i = 0; i < paddedLength - stringLength; i++) { |
| 1061 | bytes_[offset_++] = ccsidManager_.space_; |
| 1062 | } |
| 1063 | } |
| 1064 | |
| 1065 | // this method inserts ddm character data into the buffer and pad's the |
| 1066 | // data with the ccsid manager's space character if the character data length |
| 1067 | // is less than paddedLength. |
| 1068 | // Not: this method is not to be used for String truncation and the string length |
| 1069 | // must be <= paddedLength. |
| 1070 | // This method assumes that the String argument can be |
| 1071 | // converted by the ccsid manager. This should be fine because usually |
| 1072 | // there are restrictions on the characters which can be used for ddm |
| 1073 | // character data. This method also assumes that the string.length() will |
| 1074 | // be the number of bytes following the conversion. |
| 1075 | final void writeScalarPaddedString(String string, int paddedLength) throws SqlException { |
| 1076 | int stringLength = string.length(); |
| 1077 | ensureLength(offset_ + paddedLength); |
| 1078 | offset_ = ccsidManager_.convertFromUCS2(string, bytes_, offset_, netAgent_); |
| 1079 | for (int i = 0; i < paddedLength - stringLength; i++) { |
| 1080 | bytes_[offset_++] = ccsidManager_.space_; |
| 1081 | } |
| 1082 | } |
| 1083 | |
| 1084 | // this method writes a 4 byte length/codepoint pair plus the bytes contained |
| 1085 | // in array buff to the buffer. |
| 1086 | // the 2 length bytes in the llcp will contain the length of the data plus |
| 1087 | // the length of the llcp. This method does not handle scenarios which |
| 1088 | // require extended length bytes. |
| 1089 | final void writeScalarBytes(int codePoint, byte[] buff) { |
| 1090 | int buffLength = buff.length; |
| 1091 | ensureLength(offset_ + buffLength + 4); |
| 1092 | bytes_[offset_++] = (byte) (((buffLength + 4) >>> 8) & 0xff); |
| 1093 | bytes_[offset_++] = (byte) ((buffLength + 4) & 0xff); |
| 1094 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 1095 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 1096 | System.arraycopy(buff, 0, bytes_, offset_, buffLength); |
| 1097 | offset_ += buffLength; |
| 1098 | } |
| 1099 | |
| 1100 | // this method inserts a 4 byte length/codepoint pair plus length number of bytes |
| 1101 | // from array buff starting at offset start. |
| 1102 | // Note: no checking will be done on the values of start and length with respect |
| 1103 | // the actual length of the byte array. The caller must provide the correct |
| 1104 | // values so an array index out of bounds exception does not occur. |
| 1105 | // the length will contain the length of the data plus the length of the llcp. |
| 1106 | // This method does not handle scenarios which require extended length bytes. |
| 1107 | final void writeScalarBytes(int codePoint, byte[] buff, int start, int length) { |
| 1108 | ensureLength(offset_ + length + 4); |
| 1109 | bytes_[offset_++] = (byte) (((length + 4) >>> 8) & 0xff); |
| 1110 | bytes_[offset_++] = (byte) ((length + 4) & 0xff); |
| 1111 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 1112 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 1113 | System.arraycopy(buff, start, bytes_, offset_, length); |
| 1114 | offset_ += length; |
| 1115 | } |
| 1116 | |
| 1117 | // insert a 4 byte length/codepoint pair plus ddm binary data into the |
| 1118 | // buffer. The binary data is padded if needed with the padByte |
| 1119 | // if the data is less than paddedLength. |
| 1120 | // Note: this method is not to be used for truncation and buff.length |
| 1121 | // must be <= paddedLength. |
| 1122 | // The llcp length bytes will contain the length of the data plus |
| 1123 | // the length of the llcp or 4. |
| 1124 | // This method does not handle scenarios which require extended length bytes. |
| 1125 | final void writeScalarPaddedBytes(int codePoint, byte[] buff, int paddedLength, byte padByte) { |
| 1126 | int buffLength = buff.length; |
| 1127 | ensureLength(offset_ + paddedLength + 4); |
| 1128 | bytes_[offset_++] = (byte) (((paddedLength + 4) >>> 8) & 0xff); |
| 1129 | bytes_[offset_++] = (byte) ((paddedLength + 4) & 0xff); |
| 1130 | bytes_[offset_++] = (byte) ((codePoint >>> 8) & 0xff); |
| 1131 | bytes_[offset_++] = (byte) (codePoint & 0xff); |
| 1132 | System.arraycopy(buff, 0, bytes_, offset_, buffLength); |
| 1133 | offset_ += buffLength; |
| 1134 | |
| 1135 | for (int i = 0; i < paddedLength - buffLength; i++) { |
| 1136 | bytes_[offset_++] = padByte; |
| 1137 | } |
| 1138 | } |
| 1139 | |
| 1140 | // this method inserts binary data into the buffer and pads the |
| 1141 | // data with the padByte if the data length is less than the paddedLength. |
| 1142 | // Not: this method is not to be used for truncation and buff.length |
| 1143 | // must be <= paddedLength. |
| 1144 | final void writeScalarPaddedBytes(byte[] buff, int paddedLength, byte padByte) { |
| 1145 | int buffLength = buff.length; |
| 1146 | ensureLength(offset_ + paddedLength); |
| 1147 | System.arraycopy(buff, 0, bytes_, offset_, buffLength); |
| 1148 | offset_ += buffLength; |
| 1149 | |
| 1150 | for (int i = 0; i < paddedLength - buffLength; i++) { |
| 1151 | bytes_[offset_++] = padByte; |
| 1152 | } |
| 1153 | } |
| 1154 | |
| 1155 | // write the request to the OutputStream and flush the OutputStream. |
| 1156 | // trace the send if PROTOCOL trace is on. |
| 1157 | protected void flush(java.io.OutputStream socketOutputStream) throws java.io.IOException { |
| 1158 | if (doesRequestContainData()) { |
| 1159 | finalizeDssLength(); |
| 1160 | sendBytes(socketOutputStream); |
| 1161 | } |
| 1162 | } |
| 1163 | |
| 1164 | protected void sendBytes(java.io.OutputStream socketOutputStream) throws java.io.IOException { |
| 1165 | try { |
| 1166 | socketOutputStream.write(bytes_, 0, offset_); |
| 1167 | socketOutputStream.flush(); |
| 1168 | } finally { |
| 1169 | if (netAgent_.logWriter_ != null && passwordIncluded_) { |
| 1170 | // if password is in the buffer, need to mask it out. |
| 1171 | maskOutPassword(); |
| 1172 | passwordIncluded_ = false; |
| 1173 | } |
| 1174 | if (netAgent_.loggingEnabled()) { |
| 1175 | ((NetLogWriter) netAgent_.logWriter_).traceProtocolFlow(bytes_, |
| 1176 | 0, |
| 1177 | offset_, |
| 1178 | NetLogWriter.TYPE_TRACE_SEND, |
| 1179 | "Request", |
| 1180 | "flush", |
| 1181 | 1); // tracepoint |
| 1182 | } |
| 1183 | clearBuffer(); |
| 1184 | } |
| 1185 | } |
| 1186 | |
| 1187 | final void maskOutPassword() { |
| 1188 | try { |
| 1189 | String maskChar = "*"; |
| 1190 | // construct a mask using the maskChar. |
| 1191 | StringBuffer mask = new StringBuffer(); |
| 1192 | for (int i = 0; i < passwordLength_; i++) { |
| 1193 | mask.append(maskChar); |
| 1194 | } |
| 1195 | // try to write mask over password. |
| 1196 | ccsidManager_.convertFromUCS2(mask.toString(), bytes_, passwordStart_, netAgent_); |
| 1197 | } catch (SqlException sqle) { |
| 1198 | // failed to convert mask, |
| 1199 | // them simply replace with 0xFF. |
| 1200 | for (int i = 0; i < passwordLength_; i++) { |
| 1201 | bytes_[passwordStart_ + i] = (byte) 0xFF; |
| 1202 | } |
| 1203 | } |
| 1204 | } |
| 1205 | |
| 1206 | // insert a java byte into the buffer. |
| 1207 | final void writeByte(byte v) { |
| 1208 | ensureLength(offset_ + 1); |
| 1209 | bytes_[offset_++] = v; |
| 1210 | } |
| 1211 | |
| 1212 | // insert a java short into the buffer. |
| 1213 | final void writeShort(short v) { |
| 1214 | ensureLength(offset_ + 2); |
| 1215 | org.apache.derby.client.am.SignedBinary.shortToBigEndianBytes(bytes_, offset_, v); |
| 1216 | offset_ += 2; |
| 1217 | } |
| 1218 | |
| 1219 | // insert a java int into the buffer. |
| 1220 | void writeInt(int v) { |
| 1221 | ensureLength(offset_ + 4); |
| 1222 | org.apache.derby.client.am.SignedBinary.intToBigEndianBytes(bytes_, offset_, v); |
| 1223 | offset_ += 4; |
| 1224 | } |
| 1225 | |
| 1226 | // insert a java long into the buffer. |
| 1227 | final void writeLong(long v) { |
| 1228 | ensureLength(offset_ + 8); |
| 1229 | org.apache.derby.client.am.SignedBinary.longToBigEndianBytes(bytes_, offset_, v); |
| 1230 | offset_ += 8; |
| 1231 | } |
| 1232 | |
| 1233 | //-- The following are the write short/int/long in bigEndian byte ordering -- |
| 1234 | |
| 1235 | // when writing Fdoca data. |
| 1236 | protected void writeShortFdocaData(short v) { |
| 1237 | ensureLength(offset_ + 2); |
| 1238 | org.apache.derby.client.am.SignedBinary.shortToBigEndianBytes(bytes_, offset_, v); |
| 1239 | offset_ += 2; |
| 1240 | } |
| 1241 | |
| 1242 | // when writing Fdoca data. |
| 1243 | protected void writeIntFdocaData(int v) { |
| 1244 | ensureLength(offset_ + 4); |
| 1245 | org.apache.derby.client.am.SignedBinary.intToBigEndianBytes(bytes_, offset_, v); |
| 1246 | offset_ += 4; |
| 1247 | } |
| 1248 | |
| 1249 | // when writing Fdoca data. |
| 1250 | protected void writeLongFdocaData(long v) { |
| 1251 | ensureLength(offset_ + 8); |
| 1252 | org.apache.derby.client.am.SignedBinary.longToBigEndianBytes(bytes_, offset_, v); |
| 1253 | offset_ += 8; |
| 1254 | } |
| 1255 | |
| 1256 | // insert a java float into the buffer. |
| 1257 | protected void writeFloat(float v) { |
| 1258 | ensureLength(offset_ + 4); |
| 1259 | org.apache.derby.client.am.FloatingPoint.floatToIeee754Bytes(bytes_, offset_, v); |
| 1260 | offset_ += 4; |
| 1261 | } |
| 1262 | |
| 1263 | // insert a java double into the buffer. |
| 1264 | protected void writeDouble(double v) { |
| 1265 | ensureLength(offset_ + 8); |
| 1266 | org.apache.derby.client.am.FloatingPoint.doubleToIeee754Bytes(bytes_, offset_, v); |
| 1267 | offset_ += 8; |
| 1268 | } |
| 1269 | |
| 1270 | // insert a java.math.BigDecimal into the buffer. |
| 1271 | final void writeBigDecimal(java.math.BigDecimal v, |
| 1272 | int declaredPrecision, |
| 1273 | int declaredScale) throws SqlException { |
| 1274 | ensureLength(offset_ + 16); |
| 1275 | int length = org.apache.derby.client.am.Decimal.bigDecimalToPackedDecimalBytes(bytes_, offset_, v, declaredPrecision, declaredScale); |
| 1276 | offset_ += length; |
| 1277 | } |
| 1278 | |
| 1279 | final void writeDate(java.sql.Date date) throws SqlException { |
| 1280 | try |
| 1281 | { |
| 1282 | ensureLength(offset_ + 10); |
| 1283 | org.apache.derby.client.am.DateTime.dateToDateBytes(bytes_, offset_, date); |
| 1284 | offset_ += 10; |
| 1285 | } catch (java.io.UnsupportedEncodingException e) { |
| 1286 | throw new SqlException(netAgent_.logWriter_, |
| 1287 | new ClientMessageId(SQLState.UNSUPPORTED_ENCODING), |
| 1288 | "java.sql.Date", "DATE", e); |
| 1289 | } |
| 1290 | } |
| 1291 | |
| 1292 | final void writeTime(java.sql.Time time) throws SqlException { |
| 1293 | try{ |
| 1294 | ensureLength(offset_ + 8); |
| 1295 | org.apache.derby.client.am.DateTime.timeToTimeBytes(bytes_, offset_, time); |
| 1296 | offset_ += 8; |
| 1297 | } catch(UnsupportedEncodingException e) { |
| 1298 | throw new SqlException(netAgent_.logWriter_, |
| 1299 | new ClientMessageId(SQLState.UNSUPPORTED_ENCODING), |
| 1300 | "java.sql.Time", "TIME", e); |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | final void writeTimestamp(java.sql.Timestamp timestamp) throws SqlException { |
| 1305 | try{ |
| 1306 | ensureLength(offset_ + 26); |
| 1307 | org.apache.derby.client.am.DateTime.timestampToTimestampBytes(bytes_, offset_, timestamp); |
| 1308 | offset_ += 26; |
| 1309 | }catch(UnsupportedEncodingException e) { |
| 1310 | throw new SqlException(netAgent_.logWriter_, |
| 1311 | new ClientMessageId(SQLState.UNSUPPORTED_ENCODING), |
| 1312 | "java.sql.Timestamp", "TIMESTAMP", e); |
| 1313 | } |
| 1314 | } |
| 1315 | |
| 1316 | // insert a java boolean into the buffer. the boolean is written |
| 1317 | // as a signed byte having the value 0 or 1. |
| 1318 | final void writeBoolean(boolean v) { |
| 1319 | ensureLength(offset_ + 1); |
| 1320 | bytes_[offset_++] = (byte) ((v ? 1 : 0) & 0xff); |
| 1321 | } |
| 1322 | |
| 1323 | // follows the TYPDEF rules (note: don't think ddm char data is ever length |
| 1324 | // delimited) |
| 1325 | // should this throw SqlException |
| 1326 | // Will write a varchar mixed or single |
| 1327 | // this was writeLDString |
| 1328 | final void writeSingleorMixedCcsidLDString(String s, String encoding) throws SqlException { |
| 1329 | byte[] b; |
| 1330 | try { |
| 1331 | b = s.getBytes(encoding); |
| 1332 | } catch (UnsupportedEncodingException e) { |
| 1333 | throw new SqlException(netAgent_.logWriter_, |
| 1334 | new ClientMessageId(SQLState.UNSUPPORTED_ENCODING), |
| 1335 | "String", "byte", e); |
| 1336 | } |
| 1337 | if (b.length > 0x7FFF) { |
| 1338 | throw new SqlException(netAgent_.logWriter_, |
| 1339 | new ClientMessageId(SQLState.LANG_STRING_TOO_LONG), |
| 1340 | "32767"); |
| 1341 | } |
| 1342 | ensureLength(offset_ + b.length + 2); |
| 1343 | writeLDBytesX(b.length, b); |
| 1344 | } |
| 1345 | |
| 1346 | |
| 1347 | final void writeLDBytes(byte[] bytes) { |
| 1348 | ensureLength(offset_ + bytes.length + 2); |
| 1349 | writeLDBytesX(bytes.length, bytes); |
| 1350 | } |
| 1351 | |
| 1352 | // private helper method which should only be called by a Request method. |
| 1353 | // must call ensureLength before calling this method. |
| 1354 | // added for code reuse and helps perf by reducing ensureLength calls. |
| 1355 | // ldSize and bytes.length may not be the same. this is true |
| 1356 | // when writing graphic ld strings. |
| 1357 | private final void writeLDBytesX(int ldSize, byte[] bytes) { |
| 1358 | bytes_[offset_++] = (byte) ((ldSize >>> 8) & 0xff); |
| 1359 | bytes_[offset_++] = (byte) (ldSize & 0xff); |
| 1360 | System.arraycopy(bytes, 0, bytes_, offset_, bytes.length); |
| 1361 | offset_ += bytes.length; |
| 1362 | } |
| 1363 | |
| 1364 | // does it follows |
| 1365 | // ccsid manager or typdef rules. should this method write ddm character |
| 1366 | // data or fodca data right now it is coded for ddm char data only |
| 1367 | final void writeDDMString(String s) throws SqlException { |
| 1368 | ensureLength(offset_ + s.length()); |
| 1369 | offset_ = ccsidManager_.convertFromUCS2(s, bytes_, offset_, netAgent_); |
| 1370 | } |
| 1371 | |
| 1372 | |
| 1373 | private byte[] buildLengthAndCodePointForEncryptedLob(int codePoint, |
| 1374 | int leftToRead, |
| 1375 | boolean writeNullByte, |
| 1376 | int extendedLengthByteCount) throws DisconnectException { |
| 1377 | byte[] lengthAndCodepoint = new byte[4]; |
| 1378 | byte[] extendedLengthBytes = new byte[extendedLengthByteCount]; |
| 1379 | |
| 1380 | if (extendedLengthByteCount > 0) { |
| 1381 | // method should never ensure length |
| 1382 | lengthAndCodepoint = writeEXTDTALengthCodePointForEncryption(0x8004 + extendedLengthByteCount, codePoint); |
| 1383 | |
| 1384 | if (writeNullByte) { |
| 1385 | |
| 1386 | extendedLengthBytes = writeExtendedLengthBytesForEncryption(extendedLengthByteCount, leftToRead + 1); |
| 1387 | } else { |
| 1388 | extendedLengthBytes = writeExtendedLengthBytesForEncryption(extendedLengthByteCount, leftToRead); |
| 1389 | } |
| 1390 | } else { |
| 1391 | if (writeNullByte) { |
| 1392 | lengthAndCodepoint = writeEXTDTALengthCodePointForEncryption(leftToRead + 4 + 1, codePoint); |
| 1393 | } else { |
| 1394 | lengthAndCodepoint = writeEXTDTALengthCodePointForEncryption(leftToRead + 4, codePoint); |
| 1395 | } |
| 1396 | } |
| 1397 | |
| 1398 | if (extendedLengthByteCount > 0) { |
| 1399 | byte[] newLengthAndCodepoint = new byte[4 + extendedLengthBytes.length]; |
| 1400 | System.arraycopy(lengthAndCodepoint, 0, newLengthAndCodepoint, 0, lengthAndCodepoint.length); |
| 1401 | System.arraycopy(extendedLengthBytes, 0, newLengthAndCodepoint, lengthAndCodepoint.length, extendedLengthBytes.length); |
| 1402 | lengthAndCodepoint = newLengthAndCodepoint; |
| 1403 | } |
| 1404 | |
| 1405 | if (writeNullByte) { |
| 1406 | byte[] nullByte = new byte[1 + lengthAndCodepoint.length]; |
| 1407 | System.arraycopy(lengthAndCodepoint, 0, nullByte, 0, lengthAndCodepoint.length); |
| 1408 | nullByte[lengthAndCodepoint.length] = 0; |
| 1409 | lengthAndCodepoint = nullByte; |
| 1410 | } |
| 1411 | return lengthAndCodepoint; |
| 1412 | } |
| 1413 | |
| 1414 | |
| 1415 | private void buildLengthAndCodePointForLob(int codePoint, |
| 1416 | int leftToRead, |
| 1417 | boolean writeNullByte, |
| 1418 | int extendedLengthByteCount) throws DisconnectException { |
| 1419 | if (extendedLengthByteCount > 0) { |
| 1420 | // method should never ensure length |
| 1421 | writeLengthCodePoint(0x8004 + extendedLengthByteCount, codePoint); |
| 1422 | |
| 1423 | if (writeNullByte) { |
| 1424 | writeExtendedLengthBytes(extendedLengthByteCount, leftToRead + 1); |
| 1425 | } else { |
| 1426 | writeExtendedLengthBytes(extendedLengthByteCount, leftToRead); |
| 1427 | } |
| 1428 | } else { |
| 1429 | if (writeNullByte) { |
| 1430 | writeLengthCodePoint(leftToRead + 4 + 1, codePoint); |
| 1431 | } else { |
| 1432 | writeLengthCodePoint(leftToRead + 4, codePoint); |
| 1433 | } |
| 1434 | } |
| 1435 | |
| 1436 | // write the null byte, if necessary |
| 1437 | if (writeNullByte) { |
| 1438 | write1Byte(0x0); |
| 1439 | } |
| 1440 | |
| 1441 | } |
| 1442 | |
| 1443 | public void setDssLengthLocation(int location) { |
| 1444 | dssLengthLocation_ = location; |
| 1445 | } |
| 1446 | |
| 1447 | public void setCorrelationID(int id) { |
| 1448 | correlationID_ = id; |
| 1449 | } |
| 1450 | } |