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.metadata/.plugins/org.eclipse.core.resources/.history/0/30dafcb16c8a00191333cad021808fa0
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| /********************************************************************************* | ||
| * Copyright (c) 2010 Forschungszentrum Juelich GmbH | ||
| * All rights reserved. | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions are met: | ||
| * | ||
| * (1) Redistributions of source code must retain the above copyright notice, | ||
| * this list of conditions and the disclaimer at the end. Redistributions in | ||
| * binary form must reproduce the above copyright notice, this list of | ||
| * conditions and the following disclaimer in the documentation and/or other | ||
| * materials provided with the distribution. | ||
| * | ||
| * (2) Neither the name of Forschungszentrum Juelich GmbH nor the names of its | ||
| * contributors may be used to endorse or promote products derived from this | ||
| * software without specific prior written permission. | ||
| * | ||
| * DISCLAIMER | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | ||
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
| * POSSIBILITY OF SUCH DAMAGE. | ||
| *********************************************************************************/ | ||
|
|
||
| package udt; | ||
|
|
||
| import java.io.IOException; | ||
| import java.io.UnsupportedEncodingException; | ||
| import java.net.DatagramPacket; | ||
| import java.net.SocketException; | ||
| import java.net.UnknownHostException; | ||
| import java.nio.ByteBuffer; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
|
|
||
| import udt.packets.ConnectionHandshake; | ||
| import udt.packets.Destination; | ||
| import udt.packets.KeepAlive; | ||
| import udt.packets.Shutdown; | ||
| import udt.util.Tools; | ||
|
|
||
| /** | ||
| * server side session in client-server mode | ||
| */ | ||
| public class ServerSession extends UDTSession { | ||
|
|
||
| private static final Logger logger=Logger.getLogger(ServerSession.class.getName()); | ||
|
|
||
| private final UDPEndPoint endPoint; | ||
|
|
||
| //last received packet (for testing purposes) | ||
| private UDTPacket lastPacket; | ||
|
|
||
| private long cookie=0;//cd 2018-08-28 | ||
| private String key="judp";//��ǣ���ʱ�����ˣ���c++һ�� | ||
| private String client=""; | ||
| int n_handshake=0; | ||
| public ServerSession(DatagramPacket dp, UDPEndPoint endPoint)throws SocketException,UnknownHostException{ | ||
| super("ServerSession localPort="+endPoint.getLocalPort()+" peer="+dp.getAddress()+":"+dp.getPort(),new Destination(dp.getAddress(),dp.getPort())); | ||
| this.endPoint=endPoint; | ||
| client=dp.getAddress()+":"+dp.getPort(); | ||
| logger.info("Created "+toString()+" talking to "+dp.getAddress()+":"+dp.getPort()); | ||
| } | ||
|
|
||
|
|
||
|
|
||
| @Override | ||
| public void received(UDTPacket packet, Destination peer){ | ||
| lastPacket=packet; | ||
|
|
||
| if(packet instanceof ConnectionHandshake) { | ||
| ConnectionHandshake connectionHandshake=(ConnectionHandshake)packet; | ||
| logger.info("Received "+connectionHandshake); | ||
|
|
||
| if (getState()<=ready){ | ||
| destination.setSocketID(connectionHandshake.getSocketID()); | ||
| if(getState()<=handshaking){ | ||
| setState(handshaking); | ||
| } | ||
| try{ | ||
| handleHandShake(connectionHandshake); | ||
| n_handshake++; | ||
| try{ | ||
| //������Ӧ���ȼ���cookie | ||
| setState(ready); | ||
| socket=new UDTSocket(endPoint, this); | ||
| cc.init(); | ||
| }catch(Exception uhe){ | ||
| //session is invalid | ||
| logger.log(Level.SEVERE,"",uhe); | ||
| setState(invalid); | ||
| } | ||
| }catch(IOException ex){ | ||
| //session invalid | ||
| logger.log(Level.WARNING,"Error processing ConnectionHandshake",ex); | ||
| setState(invalid); | ||
| } | ||
| return; | ||
| } | ||
| else | ||
| { | ||
| //cd �ظ� | ||
| try { | ||
| handleHandShake(connectionHandshake); | ||
| } catch (IOException e) { | ||
| e.printStackTrace(); | ||
| } | ||
| } | ||
|
|
||
| }else if(packet instanceof KeepAlive) { | ||
| socket.getReceiver().resetEXPTimer(); | ||
| active = true; | ||
| return; | ||
| } | ||
|
|
||
| if(getState()== ready) { | ||
| active = true; | ||
|
|
||
| if (packet instanceof KeepAlive) { | ||
| //nothing to do here | ||
| return; | ||
| }else if (packet instanceof Shutdown) { | ||
| try{ | ||
| socket.getReceiver().stop(); | ||
| }catch(IOException ex){ | ||
| logger.log(Level.WARNING,"",ex); | ||
| } | ||
| setState(shutdown); | ||
| System.out.println("SHUTDOWN ***"); | ||
| active = false; | ||
| logger.info("Connection shutdown initiated by the other side."); | ||
| return; | ||
| } | ||
|
|
||
| else{ | ||
| try{ | ||
|
|
||
| if(packet.forSender()){ | ||
| socket.getSender().receive(packet); | ||
| }else{ | ||
| socket.getReceiver().receive(packet); | ||
| } | ||
| }catch(Exception ex){ | ||
| //session invalid | ||
| logger.log(Level.SEVERE,"",ex); | ||
| setState(invalid); | ||
| } | ||
| } | ||
| return; | ||
|
|
||
| } | ||
|
|
||
|
|
||
| } | ||
|
|
||
| /** | ||
| * for testing use only | ||
| */ | ||
| UDTPacket getLastPacket(){ | ||
| return lastPacket; | ||
| } | ||
|
|
||
| /** | ||
| * handle the connection handshake:<br/> | ||
| * <ul> | ||
| * <li>set initial sequence number</li> | ||
| * <li>send response handshake</li> | ||
| * </ul> | ||
| * @param handshake | ||
| * @param peer | ||
| * @throws IOException | ||
| */ | ||
| protected void handleHandShake(ConnectionHandshake handshake)throws IOException{ | ||
| ConnectionHandshake responseHandshake = new ConnectionHandshake(); | ||
| //compare the packet size and choose minimun | ||
| long clientBufferSize=handshake.getPacketSize(); | ||
| long myBufferSize=getDatagramSize(); | ||
| long bufferSize=Math.min(clientBufferSize, myBufferSize); | ||
| long initialSequenceNumber=handshake.getInitialSeqNo(); | ||
| setInitialSequenceNumber(initialSequenceNumber); | ||
| setDatagramSize((int)bufferSize); | ||
| responseHandshake.setPacketSize(bufferSize); | ||
| responseHandshake.setUdtVersion(4); | ||
| responseHandshake.setInitialSeqNo(initialSequenceNumber); | ||
| responseHandshake.setConnectionType(-1); | ||
| responseHandshake.setMaxFlowWndSize(handshake.getMaxFlowWndSize()); | ||
| //tell peer what the socket ID on this side is | ||
| responseHandshake.setSocketID(mySocketID); | ||
| responseHandshake.setDestinationID(this.getDestination().getSocketID()); | ||
| //cd 2018-08-28 | ||
| if(this.cookie==0) | ||
| { | ||
| this.cookie=createCookie(); | ||
| } | ||
| responseHandshake.setcookie(cookie); | ||
|
|
||
| responseHandshake.setSession(this); | ||
| logger.info("Sending reply "+responseHandshake); | ||
| endPoint.doSend(responseHandshake); | ||
| } | ||
|
|
||
| /** | ||
| * cd | ||
| * @Title: createcCookie | ||
| * @Description: ����Cookie | ||
| * @param @return ���� | ||
| * @return long �������� | ||
| */ | ||
| private long createCookie() | ||
| { | ||
| byte[] bytes=null; | ||
| byte[] result=new byte[4]; | ||
| ByteBuffer buf=ByteBuffer.wrap(result); | ||
| //������c++һ�� | ||
| String src=Tools.string2MD5(client+key); | ||
| try { | ||
| bytes=src.getBytes("utf-8"); | ||
| } catch (UnsupportedEncodingException e) | ||
| { | ||
| bytes=src.getBytes(); | ||
| } | ||
| if(bytes.length>4) | ||
| { | ||
| buf.put(bytes, 0, 4); | ||
| } | ||
| else | ||
| { | ||
| buf.put(bytes); | ||
| } | ||
| buf.flip(); | ||
| return buf.getInt(); | ||
| } | ||
|
|
||
| private String GetClientCookie() | ||
| { | ||
| long timespan=(System.currentTimeMillis()-startTime)/60000;//ת������ | ||
| return client+":"+timespan; | ||
| } | ||
| } | ||
|
|
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