// 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);
}
}