Exemplo n.º 1
0
  /**
   * This is input reading thread for the pipelined parser. You feed it input through the input
   * stream (see the constructor) and it calls back an event listener interface for message
   * processing or error. It cleans up the input - dealing with things like line continuation
   */
  public void run() {

    Pipeline inputStream = this.rawInputStream;
    // inputStream = new MyFilterInputStream(this.rawInputStream);
    // I cannot use buffered reader here because we may need to switch
    // encodings to read the message body.
    try {
      while (true) {
        this.sizeCounter = this.maxMessageSize;
        // this.messageSize = 0;
        StringBuffer inputBuffer = new StringBuffer();

        if (Debug.parserDebug) Debug.println("Starting parse!");

        String line1;
        String line2 = null;

        while (true) {
          try {
            line1 = readLine(inputStream);
            // ignore blank lines.
            if (line1.equals("\n")) {
              if (Debug.parserDebug) Debug.println("Discarding " + line1);
              continue;
            } else break;
          } catch (IOException ex) {
            Debug.printStackTrace(ex);
            this.rawInputStream.stopTimer();
            return;
          }
        }

        inputBuffer.append(line1);
        // Guard against bad guys.
        this.rawInputStream.startTimer();

        while (true) {
          try {
            line2 = readLine(inputStream);
            inputBuffer.append(line2);
            if (line2.trim().equals("")) break;
          } catch (IOException ex) {
            this.rawInputStream.stopTimer();
            Debug.printStackTrace(ex);
            return;
          }
        }

        // Stop the timer that will kill the read.
        this.rawInputStream.stopTimer();
        inputBuffer.append(line2);
        StringMsgParser smp = new StringMsgParser(sipMessageListener);
        smp.readBody = false;
        SIPMessage sipMessage = null;

        try {
          sipMessage = smp.parseSIPMessage(inputBuffer.toString());
          if (sipMessage == null) {
            this.rawInputStream.stopTimer();
            continue;
          }
        } catch (ParseException ex) {
          // Just ignore the parse exception.
          continue;
        }

        if (Debug.parserDebug) Debug.println("Completed parsing message");
        ContentLength cl = (ContentLength) sipMessage.getContentLength();
        int contentLength = 0;
        if (cl != null) {
          contentLength = cl.getContentLength();
        } else {
          contentLength = 0;
        }

        if (Debug.parserDebug) {
          Debug.println("contentLength " + contentLength);
          Debug.println("sizeCounter " + this.sizeCounter);
          Debug.println("maxMessageSize " + this.maxMessageSize);
        }

        if (contentLength == 0) {
          sipMessage.removeContent();
        } else if (maxMessageSize == 0 || contentLength < this.sizeCounter) {
          byte[] message_body = new byte[contentLength];
          int nread = 0;
          while (nread < contentLength) {
            // Start my starvation timer.
            // This ensures that the other end
            // writes at least some data in
            // or we will close the pipe from
            // him. This prevents DOS attack
            // that takes up all our connections.
            this.rawInputStream.startTimer();
            try {

              int readlength = inputStream.read(message_body, nread, contentLength - nread);
              if (readlength > 0) {
                nread += readlength;
              } else {
                break;
              }
            } catch (IOException ex) {
              ex.printStackTrace();
              break;
            } finally {
              // Stop my starvation timer.
              this.rawInputStream.stopTimer();
            }
          }
          sipMessage.setMessageContent(message_body);
        }
        // Content length too large - process the message and
        // return error from there.
        if (sipMessageListener != null) {
          try {
            sipMessageListener.processMessage(sipMessage);
          } catch (Exception ex) {
            // fatal error in processing - close the
            // connection.
            break;
          }
        }
      }
    } finally {
      try {
        inputStream.close();
      } catch (IOException e) {
        InternalErrorHandler.handleException(e);
      }
    }
  }
  /**
   * This gets invoked when thread.start is called from the constructor. Implements a message loop -
   * reading the tcp connection and processing messages until we are done or the other end has
   * closed.
   */
  public void run() {
    String message;
    Pipeline hispipe = null;
    // Create a pipeline to connect to our message parser.
    hispipe =
        new Pipeline(myClientInputStream, stack.readTimeout, ((SIPTransactionStack) stack).timer);
    // Create a pipelined message parser to read and parse
    // messages that we write out to him.
    myParser = new PipelinedMsgParser(this, hispipe, this.stack.getMaxMessageSize());
    // Start running the parser thread.
    myParser.processInput();
    // bug fix by Emmanuel Proulx
    int bufferSize = 4096;
    this.tlsMessageProcessor.useCount++;
    this.isRunning = true;
    try {
      while (true) {
        try {
          byte[] msg = new byte[bufferSize];
          int nbytes = myClientInputStream.read(msg, 0, bufferSize);
          // no more bytes to read...
          if (nbytes == -1) {
            hispipe.write("\r\n\r\n".getBytes("UTF-8"));
            try {
              if (stack.maxConnections != -1) {
                synchronized (tlsMessageProcessor) {
                  tlsMessageProcessor.nConnections--;
                  tlsMessageProcessor.notify();
                }
              }
              hispipe.close();
              mySock.close();
            } catch (IOException ioex) {
            }
            return;
          }
          hispipe.write(msg, 0, nbytes);

        } catch (IOException ex) {
          // Terminate the message.
          try {
            hispipe.write("\r\n\r\n".getBytes("UTF-8"));
          } catch (Exception e) {
            // InternalErrorHandler.handleException(e);
          }

          try {
            if (LogWriter.needsLogging)
              stack.logWriter.logMessage("IOException  closing sock " + ex);
            try {
              if (stack.maxConnections != -1) {
                synchronized (tlsMessageProcessor) {
                  tlsMessageProcessor.nConnections--;
                  tlsMessageProcessor.notify();
                }
              }
              mySock.close();
              hispipe.close();
            } catch (IOException ioex) {
            }
          } catch (Exception ex1) {
            // Do nothing.
          }
          return;
        } catch (Exception ex) {
          InternalErrorHandler.handleException(ex);
        }
      }
    } finally {
      this.isRunning = false;
      this.tlsMessageProcessor.remove(this);
      this.tlsMessageProcessor.useCount--;
    }
  }