| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| package rdpclient.rdp; |
| |
| import streamer.BaseElement; |
| import streamer.ByteBuffer; |
| import streamer.Link; |
| |
| public class ServerTpkt extends BaseElement { |
| |
| /** |
| * TPKT protocol version (first byte). |
| */ |
| public static final int PROTOCOL_TPKT = 3; |
| |
| public ServerTpkt(String id) { |
| super(id); |
| } |
| |
| @Override |
| public void handleData(ByteBuffer buf, Link link) { |
| if (buf == null) |
| return; |
| |
| if (verbose) |
| System.out.println("[" + this + "] INFO: Data received: " + buf + "."); |
| |
| // We need at least 4 bytes to get packet length |
| if (!cap(buf, 4, UNLIMITED, link, false)) |
| return; |
| |
| int version = buf.readUnsignedByte(); |
| if (version != PROTOCOL_TPKT) |
| throw new RuntimeException("Unexpected data in TPKT header. Expected TPKT version: 0x03, actual value: " + buf + "."); |
| |
| buf.skipBytes(1); // Reserved byte |
| |
| // Length of whole packet, including header |
| int length = buf.readUnsignedShort(); |
| if (!cap(buf, length, length, link, false)) |
| return; |
| |
| int payloadLength = length - buf.cursor; |
| |
| // Extract payload |
| ByteBuffer outBuf = buf.slice(buf.cursor, payloadLength, true); |
| buf.unref(); |
| |
| if (verbose) { |
| outBuf.putMetadata("source", this); |
| } |
| |
| pushDataToAllOuts(outBuf); |
| } |
| |
| } |