Пример #1
0
  /**
   * Puts {@code numBits} into the buffer with the value {@code value}.
   *
   * @param numBits The number of bits to put into the buffer.
   * @param value The value.
   * @throws IllegalStateException if the builder is not in bit access mode.
   * @throws IllegalArgumentException if the number of bits is not between 1 and 31 inclusive.
   */
  public void putBits(int numBits, int value) {
    if (numBits <= 0 || numBits > 32) {
      throw new IllegalArgumentException("Number of bits must be between 1 and 31 inclusive");
    }

    checkBitAccess();

    int bytePos = bitIndex >> 3;
    int bitOffset = 8 - (bitIndex & 7);
    bitIndex += numBits;

    int requiredSpace = bytePos - buffer.writerIndex() + 1;
    requiredSpace += (numBits + 7) / 8;
    buffer.ensureWritable(requiredSpace);

    for (; numBits > bitOffset; bitOffset = 8) {
      int tmp = buffer.getByte(bytePos);
      tmp &= ~BITMASKS[bitOffset];
      tmp |= (value >> (numBits - bitOffset)) & BITMASKS[bitOffset];
      buffer.setByte(bytePos++, tmp);
      numBits -= bitOffset;
    }
    if (numBits == bitOffset) {
      int tmp = buffer.getByte(bytePos);
      tmp &= ~BITMASKS[bitOffset];
      tmp |= value & BITMASKS[bitOffset];
      buffer.setByte(bytePos, tmp);
    } else {
      int tmp = buffer.getByte(bytePos);
      tmp &= ~(BITMASKS[numBits] << (bitOffset - numBits));
      tmp |= (value & BITMASKS[numBits]) << (bitOffset - numBits);
      buffer.setByte(bytePos, tmp);
    }
  }
 private static boolean isValueFound(ByteBuf buffer, int index, ByteBuf search) {
   for (int i = 0; i < search.readableBytes(); i++) {
     if (buffer.getByte(index + i) != search.getByte(i)) {
       return false;
     }
   }
   return true;
 }
Пример #3
0
  public static int stringLeftMatchUTF8(
      ByteBuf str, int strStart, int strEnd, ByteBuf substr, int subStart, int subEnd) {
    for (int i = strStart; i <= strEnd - (subEnd - subStart); i++) {
      int j = subStart;
      for (; j < subEnd; j++) {
        if (str.getByte(i + j - subStart) != substr.getByte(j)) break;
      }

      if (j == subEnd && j != subStart) { // found a matched substr (non-empty) in str.
        return i; // found a match.
      }
    }

    return -1;
  }
Пример #4
0
  public boolean hasError() {
    if (response == null) return false;

    if (response.getByte(0) == Coder.ERROR_ID) return true;

    return false;
  }
  private void checkPrintableAscii(final ByteBuf buffer) {
    final ByteBuf tmpBuffer = buffer.slice();
    final int lowerBound = tmpBuffer.readerIndex();
    final int upperBound = tmpBuffer.writerIndex();

    for (int idx = lowerBound; idx < upperBound; ++idx) {
      checkPrintableAscii(tmpBuffer.getByte(idx));
    }
  }
Пример #6
0
 /**
  * In-place parsing of a hex encoded binary string.
  *
  * <p>This function does not modify the {@code readerIndex} and {@code writerIndex} of the byte
  * buffer.
  *
  * @return Index in the byte buffer just after the last written byte.
  */
 public static int parseBinaryString(ByteBuf str, int strStart, int strEnd) {
   int length = (strEnd - strStart);
   int dstEnd = strStart;
   for (int i = strStart; i < length; i++) {
     byte b = str.getByte(i);
     if (b == '\\' && length > i + 3 && (str.getByte(i + 1) == 'x' || str.getByte(i + 1) == 'X')) {
       // ok, take next 2 hex digits.
       byte hd1 = str.getByte(i + 2);
       byte hd2 = str.getByte(i + 3);
       if (isHexDigit(hd1) && isHexDigit(hd2)) { // [a-fA-F0-9]
         // turn hex ASCII digit -> number
         b = (byte) ((toBinaryFromHex(hd1) << 4) + toBinaryFromHex(hd2));
         i += 3; // skip 3
       }
     }
     str.setByte(dstEnd++, b);
   }
   return dstEnd;
 }
  private SpdyHeadersFrame readHeaderBlockFrame(ByteBuf buffer) {
    int streamId;
    switch (type) {
      case SPDY_SYN_STREAM_FRAME:
        if (buffer.readableBytes() < 10) {
          return null;
        }

        int offset = buffer.readerIndex();
        streamId = getUnsignedInt(buffer, offset);
        int associatedToStreamId = getUnsignedInt(buffer, offset + 4);
        byte priority = (byte) (buffer.getByte(offset + 8) >> 5 & 0x07);
        buffer.skipBytes(10);
        length -= 10;

        SpdySynStreamFrame spdySynStreamFrame =
            new DefaultSpdySynStreamFrame(streamId, associatedToStreamId, priority);
        spdySynStreamFrame.setLast((flags & SPDY_FLAG_FIN) != 0);
        spdySynStreamFrame.setUnidirectional((flags & SPDY_FLAG_UNIDIRECTIONAL) != 0);

        return spdySynStreamFrame;

      case SPDY_SYN_REPLY_FRAME:
        if (buffer.readableBytes() < 4) {
          return null;
        }

        streamId = getUnsignedInt(buffer, buffer.readerIndex());
        buffer.skipBytes(4);
        length -= 4;

        SpdySynReplyFrame spdySynReplyFrame = new DefaultSpdySynReplyFrame(streamId);
        spdySynReplyFrame.setLast((flags & SPDY_FLAG_FIN) != 0);

        return spdySynReplyFrame;

      case SPDY_HEADERS_FRAME:
        if (buffer.readableBytes() < 4) {
          return null;
        }

        streamId = getUnsignedInt(buffer, buffer.readerIndex());
        buffer.skipBytes(4);
        length -= 4;

        SpdyHeadersFrame spdyHeadersFrame = new DefaultSpdyHeadersFrame(streamId);
        spdyHeadersFrame.setLast((flags & SPDY_FLAG_FIN) != 0);

        return spdyHeadersFrame;

      default:
        throw new Error("Shouldn't reach here.");
    }
  }
Пример #8
0
  @Override
  protected void encode(ChannelHandlerContext ctx, MessageBuilder msg, ByteBuf out)
      throws Exception {

    // Generate a new encryption key using ISAAC, encode the message and
    // write it to the client.
    ByteBuf internal = msg.buffer();
    int value = internal.getByte(0) + encryptor.getKey();
    internal.setByte(0, value);
    out.writeBytes(internal);
  }
  @Override
  protected Object decodeLast(ChannelHandlerContext ctx, ByteBuf buffer) throws Exception {
    switch (buffer.readableBytes()) {
      case 0:
        return null;
      case 1:
        // Ignore the last TC_RESET
        if (buffer.getByte(buffer.readerIndex()) == ObjectStreamConstants.TC_RESET) {
          buffer.skipBytes(1);
          return null;
        }
    }

    return decode(ctx, buffer);
  }
Пример #10
0
 /**
  * Return a printable representation of a byte buffer, escaping the non-printable bytes as '\\xNN'
  * where NN is the hexadecimal representation of such bytes.
  *
  * <p>This function does not modify the {@code readerIndex} and {@code writerIndex} of the byte
  * buffer.
  */
 public static String toBinaryString(ByteBuf buf, int strStart, int strEnd) {
   StringBuilder result = new StringBuilder();
   for (int i = strStart; i < strEnd; ++i) {
     int ch = buf.getByte(i) & 0xFF;
     if ((ch >= '0' && ch <= '9')
         || (ch >= 'A' && ch <= 'Z')
         || (ch >= 'a' && ch <= 'z')
         || " `~!@#$%^&*()-_=+[]{}|;:'\",.<>/?".indexOf(ch) >= 0) {
       result.append((char) ch);
     } else {
       result.append(String.format("\\x%02X", ch));
     }
   }
   return result.toString();
 }
Пример #11
0
    /**
     * Peeks at that the next frame in the buffer and verifies that it is a {@code SETTINGS} frame.
     *
     * @param in the inbound buffer.
     * @return {@code} true if the next frame is a {@code SETTINGS} frame, {@code false} if more
     *     data is required before we can determine the next frame type.
     * @throws Http2Exception thrown if the next frame is NOT a {@code SETTINGS} frame.
     */
    private boolean verifyFirstFrameIsSettings(ByteBuf in) throws Http2Exception {
      if (in.readableBytes() < 4) {
        // Need more data before we can see the frame type for the first frame.
        return false;
      }

      byte frameType = in.getByte(in.readerIndex() + 3);
      if (frameType != SETTINGS) {
        throw connectionError(
            PROTOCOL_ERROR,
            "First received frame was not SETTINGS. " + "Hex dump for first 4 bytes: %s",
            hexDump(in, in.readerIndex(), 4));
      }
      return true;
    }
  @Override
  public void channelRead(ChannelHandlerContext ctx, Object msg) {
    //        byte[] byte_buf = new byte[1024];
    //        ((ByteBuf)msg).getBytes(0, byte_buf);
    //        for(int i = 0; i < byte_buf.length; i++)
    //            System.out.printf("%X ", byte_buf[i]);
    //        System.out.println();
    //        ctx.write(msg);

    ByteBuf byteBuf = (ByteBuf) msg;
    for (int i = 0; i < byteBuf.readableBytes(); i++) {
      System.out.printf("%X ", byteBuf.getByte(i));
    }
    System.out.println();
  }
Пример #13
0
 private static int utf8CharLen(ByteBuf buffer, int idx) {
   byte firstByte = buffer.getByte(idx);
   if (firstByte >= 0) { // 1-byte char. First byte is 0xxxxxxx.
     return 1;
   } else if ((firstByte & 0xE0) == 0xC0) { // 2-byte char. First byte is 110xxxxx
     return 2;
   } else if ((firstByte & 0xF0) == 0xE0) { // 3-byte char. First byte is 1110xxxx
     return 3;
   } else if ((firstByte & 0xF8) == 0xF0) { // 4-byte char. First byte is 11110xxx
     return 4;
   }
   throw new DrillRuntimeException(
       "Unexpected byte 0x"
           + Integer.toString((int) firstByte & 0xff, 16)
           + " at position "
           + idx
           + " encountered while decoding UTF8 string.");
 }
 @Override
 public byte getByte(int var1) {
   return a.getByte(var1);
 }
 private void unmask(ByteBuf frame) {
   for (int i = frame.readerIndex(); i < frame.writerIndex(); i++) {
     frame.setByte(i, frame.getByte(i) ^ maskingKey.getByte(i % 4));
   }
 }
Пример #16
0
  private State readCommonHeader(ByteBuf buffer) {
    // Wait until entire header is readable
    if (buffer.readableBytes() < SPDY_HEADER_SIZE) {
      return State.READ_COMMON_HEADER;
    }

    int frameOffset = buffer.readerIndex();
    int flagsOffset = frameOffset + SPDY_HEADER_FLAGS_OFFSET;
    int lengthOffset = frameOffset + SPDY_HEADER_LENGTH_OFFSET;
    buffer.skipBytes(SPDY_HEADER_SIZE);

    // Read common header fields
    boolean control = (buffer.getByte(frameOffset) & 0x80) != 0;
    flags = buffer.getByte(flagsOffset);
    length = getUnsignedMedium(buffer, lengthOffset);

    if (control) {
      // Decode control frame common header
      version = getUnsignedShort(buffer, frameOffset) & 0x7FFF;

      int typeOffset = frameOffset + SPDY_HEADER_TYPE_OFFSET;
      type = getUnsignedShort(buffer, typeOffset);

      streamId = 0;
    } else {
      // Decode data frame common header
      version = spdyVersion; // Default to expected version

      type = SPDY_DATA_FRAME;

      streamId = getUnsignedInt(buffer, frameOffset);
    }
    // Check version first then validity
    if (version != spdyVersion || !isValidFrameHeader()) {
      return State.FRAME_ERROR;
    }

    // Make sure decoder will produce a frame or consume input
    State nextState;
    if (willGenerateFrame()) {
      switch (type) {
        case SPDY_DATA_FRAME:
          nextState = State.READ_DATA_FRAME;
          break;

        case SPDY_SYN_STREAM_FRAME:
        case SPDY_SYN_REPLY_FRAME:
        case SPDY_HEADERS_FRAME:
          nextState = State.READ_HEADER_BLOCK_FRAME;
          break;

        case SPDY_SETTINGS_FRAME:
          nextState = State.READ_SETTINGS_FRAME;
          break;

        default:
          nextState = State.READ_CONTROL_FRAME;
      }
    } else if (length != 0) {
      nextState = State.DISCARD_FRAME;
    } else {
      nextState = State.READ_COMMON_HEADER;
    }
    return nextState;
  }
Пример #17
0
  @Override
  protected void decode(ChannelHandlerContext ctx, ByteBuf buffer, List<Object> out)
      throws Exception {
    switch (state) {
      case READ_COMMON_HEADER:
        state = readCommonHeader(buffer);
        if (state == State.FRAME_ERROR) {
          if (version != spdyVersion) {
            fireProtocolException(ctx, "Unsupported version: " + version);
          } else {
            fireInvalidFrameException(ctx);
          }
        }

        // FrameDecoders must consume data when producing frames
        // All length 0 frames must be generated now
        if (length == 0) {
          if (state == State.READ_DATA_FRAME) {
            SpdyDataFrame spdyDataFrame = new DefaultSpdyDataFrame(streamId);
            spdyDataFrame.setLast((flags & SPDY_DATA_FLAG_FIN) != 0);
            state = State.READ_COMMON_HEADER;
            out.add(spdyDataFrame);
            return;
          }
          // There are no length 0 control frames
          state = State.READ_COMMON_HEADER;
        }

        return;

      case READ_CONTROL_FRAME:
        try {
          Object frame = readControlFrame(buffer);
          if (frame != null) {
            state = State.READ_COMMON_HEADER;
            out.add(frame);
          }
          return;
        } catch (IllegalArgumentException e) {
          state = State.FRAME_ERROR;
          fireInvalidFrameException(ctx);
        }
        return;

      case READ_SETTINGS_FRAME:
        if (spdySettingsFrame == null) {
          // Validate frame length against number of entries
          if (buffer.readableBytes() < 4) {
            return;
          }
          int numEntries = getUnsignedInt(buffer, buffer.readerIndex());
          buffer.skipBytes(4);
          length -= 4;

          // Each ID/Value entry is 8 bytes
          if ((length & 0x07) != 0 || length >> 3 != numEntries) {
            state = State.FRAME_ERROR;
            fireInvalidFrameException(ctx);
            return;
          }

          spdySettingsFrame = new DefaultSpdySettingsFrame();

          boolean clear = (flags & SPDY_SETTINGS_CLEAR) != 0;
          spdySettingsFrame.setClearPreviouslyPersistedSettings(clear);
        }

        int readableEntries = Math.min(buffer.readableBytes() >> 3, length >> 3);
        for (int i = 0; i < readableEntries; i++) {
          byte ID_flags = buffer.getByte(buffer.readerIndex());
          int ID = getUnsignedMedium(buffer, buffer.readerIndex() + 1);
          int value = getSignedInt(buffer, buffer.readerIndex() + 4);
          buffer.skipBytes(8);

          if (!spdySettingsFrame.isSet(ID)) {
            boolean persistVal = (ID_flags & SPDY_SETTINGS_PERSIST_VALUE) != 0;
            boolean persisted = (ID_flags & SPDY_SETTINGS_PERSISTED) != 0;
            spdySettingsFrame.setValue(ID, value, persistVal, persisted);
          }
        }

        length -= 8 * readableEntries;
        if (length == 0) {
          state = State.READ_COMMON_HEADER;
          Object frame = spdySettingsFrame;
          spdySettingsFrame = null;
          out.add(frame);
          return;
        }
        return;

      case READ_HEADER_BLOCK_FRAME:
        try {
          spdyHeadersFrame = readHeaderBlockFrame(buffer);
          if (spdyHeadersFrame != null) {
            if (length == 0) {
              state = State.READ_COMMON_HEADER;
              Object frame = spdyHeadersFrame;
              spdyHeadersFrame = null;
              out.add(frame);
              return;
            }
            state = State.READ_HEADER_BLOCK;
          }
          return;
        } catch (IllegalArgumentException e) {
          state = State.FRAME_ERROR;
          fireInvalidFrameException(ctx);
          return;
        }

      case READ_HEADER_BLOCK:
        int compressedBytes = Math.min(buffer.readableBytes(), length);
        ByteBuf compressed = buffer.slice(buffer.readerIndex(), compressedBytes);

        try {
          headerBlockDecoder.decode(compressed, spdyHeadersFrame);
        } catch (Exception e) {
          state = State.FRAME_ERROR;
          spdyHeadersFrame = null;
          ctx.fireExceptionCaught(e);
          return;
        }

        int readBytes = compressedBytes - compressed.readableBytes();
        buffer.skipBytes(readBytes);
        length -= readBytes;

        if (spdyHeadersFrame != null
            && (spdyHeadersFrame.isInvalid() || spdyHeadersFrame.isTruncated())) {

          Object frame = spdyHeadersFrame;
          spdyHeadersFrame = null;
          if (length == 0) {
            headerBlockDecoder.reset();
            state = State.READ_COMMON_HEADER;
          }
          out.add(frame);
          return;
        }

        if (length == 0) {
          Object frame = spdyHeadersFrame;
          spdyHeadersFrame = null;
          headerBlockDecoder.reset();
          state = State.READ_COMMON_HEADER;
          if (frame != null) {
            out.add(frame);
          }
        }
        return;

      case READ_DATA_FRAME:
        if (streamId == 0) {
          state = State.FRAME_ERROR;
          fireProtocolException(ctx, "Received invalid data frame");
          return;
        }

        // Generate data frames that do not exceed maxChunkSize
        int dataLength = Math.min(maxChunkSize, length);

        // Wait until entire frame is readable
        if (buffer.readableBytes() < dataLength) {
          return;
        }

        ByteBuf data = ctx.alloc().buffer(dataLength);
        data.writeBytes(buffer, dataLength);
        SpdyDataFrame spdyDataFrame = new DefaultSpdyDataFrame(streamId, data);
        length -= dataLength;

        if (length == 0) {
          spdyDataFrame.setLast((flags & SPDY_DATA_FLAG_FIN) != 0);
          state = State.READ_COMMON_HEADER;
        }
        out.add(spdyDataFrame);
        return;

      case DISCARD_FRAME:
        int numBytes = Math.min(buffer.readableBytes(), length);
        buffer.skipBytes(numBytes);
        length -= numBytes;
        if (length == 0) {
          state = State.READ_COMMON_HEADER;
        }
        return;

      case FRAME_ERROR:
        buffer.skipBytes(buffer.readableBytes());
        return;

      default:
        throw new Error("Shouldn't reach here.");
    }
  }
Пример #18
0
 /**
  * Returns the {@code byte} at position {@code pos} in the Buffer.
  *
  * @throws IndexOutOfBoundsException if the specified {@code pos} is less than {@code 0} or {@code
  *     pos + 1} is greater than the length of the Buffer.
  */
 public byte getByte(int pos) {
   return buffer.getByte(pos);
 }
Пример #19
0
 @Override
 public byte getByte(int index) {
   return buf.getByte(index);
 }
Пример #20
0
 /**
  * Reads a big-endian short integer from the buffer. Please note that we do not use {@link
  * ByteBuf#getShort(int)} because it might be a little-endian buffer.
  */
 private static short getShort(ByteBuf buf, int offset) {
   return (short) (buf.getByte(offset) << 8 | buf.getByte(offset + 1) & 0xFF);
 }