/*
* Created on Feb 15, 2008
* Created by Paul Gardner
*
* Copyright 2008 Vuze, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License only.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
package com.aelitis.azureus.plugins.net.netstatus;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.util.*;
import org.gudy.azureus2.core3.util.AERunnable;
import org.gudy.azureus2.core3.util.AESemaphore;
import org.gudy.azureus2.core3.util.ByteFormatter;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.core3.util.DelayedEvent;
import org.gudy.azureus2.core3.util.DirectByteBuffer;
import org.gudy.azureus2.core3.util.HashWrapper;
import org.gudy.azureus2.core3.util.RandomUtils;
import org.gudy.azureus2.core3.util.SystemTime;
import com.aelitis.azureus.core.networkmanager.ConnectionEndpoint;
import com.aelitis.azureus.core.networkmanager.IncomingMessageQueue;
import com.aelitis.azureus.core.networkmanager.NetworkConnection;
import com.aelitis.azureus.core.networkmanager.NetworkManager;
import com.aelitis.azureus.core.networkmanager.OutgoingMessageQueue;
import com.aelitis.azureus.core.networkmanager.ProtocolEndpoint;
import com.aelitis.azureus.core.networkmanager.ProtocolEndpointFactory;
import com.aelitis.azureus.core.networkmanager.impl.tcp.ProtocolEndpointTCP;
import com.aelitis.azureus.core.peermanager.PeerManager;
import com.aelitis.azureus.core.peermanager.PeerManagerRegistration;
import com.aelitis.azureus.core.peermanager.PeerManagerRegistrationAdapter;
import com.aelitis.azureus.core.peermanager.messaging.Message;
import com.aelitis.azureus.core.peermanager.messaging.bittorrent.BTBitfield;
import com.aelitis.azureus.core.peermanager.messaging.bittorrent.BTHandshake;
import com.aelitis.azureus.core.peermanager.messaging.bittorrent.BTHave;
import com.aelitis.azureus.core.peermanager.messaging.bittorrent.BTMessage;
import com.aelitis.azureus.core.peermanager.messaging.bittorrent.BTMessageDecoder;
import com.aelitis.azureus.core.peermanager.messaging.bittorrent.BTMessageEncoder;
import com.aelitis.azureus.core.peermanager.messaging.bittorrent.BTMessageFactory;
import com.aelitis.azureus.core.util.CopyOnWriteList;
public class
NetStatusProtocolTesterBT
{
private static Random random = RandomUtils.SECURE_RANDOM;
private NetStatusProtocolTester tester;
private boolean test_initiator;
private CopyOnWriteList listeners = new CopyOnWriteList();
private byte[] my_hash;
private byte[] peer_id;
private PeerManagerRegistration pm_reg;
private long start_time = SystemTime.getCurrentTime();
private List sessions = new ArrayList();
private int session_id_next;
private int outbound_attempts = 0;
private int outbound_connects = 0;
private int inbound_connects = 0;
private boolean outbound_connections_complete;
private AESemaphore completion_sem = new AESemaphore( "Completion" );
private boolean destroyed;
protected
NetStatusProtocolTesterBT(
NetStatusProtocolTester _tester,
boolean _test_initiator )
{
tester = _tester;
test_initiator = _test_initiator;
}
protected void
start()
{
my_hash = new byte[20];
random.nextBytes( my_hash );
peer_id = new byte[20];
random.nextBytes( peer_id );
pm_reg = PeerManager.getSingleton().registerLegacyManager(
new HashWrapper( my_hash ),
new PeerManagerRegistrationAdapter()
{
public byte[][]
getSecrets()
{
return( new byte[][]{ my_hash });
}
public boolean
manualRoute(
NetworkConnection connection )
{
log( "Got incoming connection from " + connection.getEndpoint().getNotionalAddress());
new Session( connection, null );
return( true );
}
public boolean
isPeerSourceEnabled(
String peer_source )
{
return( true );
}
public boolean
activateRequest(
InetSocketAddress remote_address )
{
return( true );
}
public void
deactivateRequest(
InetSocketAddress remote_address )
{
}
public String
getDescription()
{
return( "NetStatusPlugin - router" );
}
});
log( "Incoming routing established for " + ByteFormatter.encodeString( my_hash ));
}
protected byte[]
getServerHash()
{
return( my_hash );
}
protected long
getStartTime(
long now )
{
if ( now < start_time ){
start_time = now;
}
return( start_time );
}
protected void
testOutbound(
InetSocketAddress address,
final byte[] their_hash,
boolean use_crypto )
{
// regardless of the caller's desires, override with crypto if we're using it
if ( NetworkManager.getCryptoRequired( NetworkManager.CRYPTO_OVERRIDE_NONE )){
use_crypto = true;
}
log( "Making outbound connection to " + address );
synchronized( this ){
outbound_attempts++;
}
boolean allow_fallback = false;
ProtocolEndpoint pe = ProtocolEndpointFactory.createEndpoint( ProtocolEndpoint.PROTOCOL_TCP, address );
ConnectionEndpoint connection_endpoint = new ConnectionEndpoint( address );
connection_endpoint.addProtocol( pe );
final NetworkConnection connection =
NetworkManager.getSingleton().createConnection(
connection_endpoint,
new BTMessageEncoder(),
new BTMessageDecoder(),
use_crypto,
allow_fallback,
new byte[][]{ their_hash });
new Session( connection, their_hash );
}
public void
destroy()
{
List to_close = new ArrayList();
synchronized( sessions ){
if ( destroyed ){
return;
}
destroyed = true;
to_close.addAll( sessions );
sessions.clear();
}
for (int i=0;i<to_close.size();i++){
Session session = (Session)to_close.get(i);
session.close();
}
pm_reg.unregister();
checkCompletion();
log( "Incoming routing destroyed for " + ByteFormatter.encodeString( my_hash ));
}
protected boolean
isDestroyed()
{
return( destroyed );
}
public void
setOutboundConnectionsComplete()
{
synchronized( sessions ){
outbound_connections_complete = true;
}
checkCompletion();
}
protected void
checkCompletion()
{
boolean inform = false;
synchronized( sessions ){
if ( completion_sem.isReleasedForever()){
return;
}
if ( destroyed ||
( outbound_connections_complete && sessions.size() == 0 )){
inform = true;
completion_sem.releaseForever();
}
}
if ( inform ){
Iterator it = listeners.iterator();
while( it.hasNext()){
try{
((NetStatusProtocolTesterListener)it.next()).complete( this );
}catch( Throwable e ){
Debug.printStackTrace(e);
}
}
}
}
public boolean
waitForCompletion(
long max_millis )
{
if ( max_millis == 0 ){
completion_sem.reserve();
return( true );
}else{
return( completion_sem.reserve( max_millis ));
}
}
public void
addListener(
NetStatusProtocolTesterListener l )
{
listeners.add( l );
}
public void
removeListener(
NetStatusProtocolTesterListener l )
{
listeners.remove( l );
}
public int
getOutboundConnects()
{
return( outbound_connects );
}
public int
getInboundConnects()
{
return( inbound_connects );
}
public String
getStatus()
{
return( "sessions=" + sessions.size() +
", out_attempts=" + outbound_attempts +
", out_connect=" + outbound_connects +
", in_connect=" + inbound_connects );
}
protected void
log(
String str )
{
Iterator it = listeners.iterator();
while( it.hasNext()){
try{
((NetStatusProtocolTesterListener)it.next()).log( str );
}catch( Throwable e ){
Debug.printStackTrace(e);
}
}
tester.log( str );
}
protected void
logError(
String str )
{
Iterator it = listeners.iterator();
while( it.hasNext()){
try{
((NetStatusProtocolTesterListener)it.next()).logError( str );
}catch( Throwable e ){
Debug.printStackTrace(e);
}
}
tester.log( str );
}
protected void
logError(
String str,
Throwable e )
{
Iterator it = listeners.iterator();
while( it.hasNext()){
try{
((NetStatusProtocolTesterListener)it.next()).logError( str, e );
}catch( Throwable f ){
Debug.printStackTrace(f);
}
}
tester.log( str, e );
}
public class
Session
{
private NetworkConnection connection;
private int session_id;
private boolean initiator;
private byte[] info_hash;
private boolean handshake_sent;
private boolean handshake_received;
private boolean bitfield_sent;
private boolean bitfield_received;
private int num_pieces;
private boolean is_seed;
private Set missing_pieces = new HashSet();
private boolean connected;
private boolean closing;
private boolean closed;
protected
Session(
NetworkConnection _connection,
byte[] _info_hash )
{
connection = _connection;
info_hash = _info_hash;
initiator = info_hash != null;
synchronized( sessions ){
session_id_next++;
session_id = session_id_next;
if ( destroyed ){
log( "Already destroyed" );
close();
return;
}else{
// if we're a responder then we limit connections as we should only
// receive 1 (be generous, give them 3 in case we decide to reconnect)
if ( !( test_initiator || initiator )){
int responder_sessions = 0;
for (int i=0;i<sessions.size();i++){
Session existing_session = (Session)sessions.get(i);
if ( !existing_session.isInitiator()){
responder_sessions++;
}
}
if ( responder_sessions >= 2 ){
log( "Too many responder sessions" );
close();
return;
}
}
sessions.add( this );
is_seed = initiator && sessions.size()%2 == 0;
}
}
Iterator it = listeners.iterator();
while( it.hasNext()){
try{
((NetStatusProtocolTesterListener)it.next()).sessionAdded( this );
}catch( Throwable e ){
Debug.printStackTrace(e);
}
}
connection.connect(
ProtocolEndpoint.CONNECT_PRIORITY_MEDIUM,
new NetworkConnection.ConnectionListener()
{
final String type = initiator?"Outbound":"Inbound";
public int
connectStarted(
int default_connect_timeout )
{
log( type + " connect start" );
return( default_connect_timeout );
}
public final void
connectSuccess(
ByteBuffer remaining_initial_data )
{
log( type + " connect success" );
connected = true;
synchronized( NetStatusProtocolTesterBT.this ){
if ( initiator ){
outbound_connects++;
}else{
inbound_connects++;
}
}
connected();
}
public final void
connectFailure(
Throwable e )
{
if ( !closing ){
logError( type + " connection fail", e );
}
close();
}
public final void
exceptionThrown(
Throwable e )
{
if ( !closing ){
logError( type + " connection fail", e );
}
close();
}
public String
getDescription()
{
return( "NetStatusPlugin - " + type );
}
});
}
public boolean
isInitiator()
{
return( initiator );
}
public boolean
isConnected()
{
return( connected );
}
public boolean
isSeed()
{
return( is_seed );
}
public boolean
isOK()
{
return( bitfield_received );
}
protected void
connected()
{
connection.getIncomingMessageQueue().registerQueueListener(
new IncomingMessageQueue.MessageQueueListener()
{
public boolean
messageReceived(
Message message )
{
try{
String message_id = message.getID();
log( "Incoming message received: " + message.getID());
if ( message_id.equals( BTMessage.ID_BT_HANDSHAKE )){
handshake_received = true;
BTHandshake handshake = (BTHandshake)message;
info_hash = handshake.getDataHash();
num_pieces = 500 + (info_hash[0]&0xff);
// we use the piece at 'n' + 1 to indicate a close request by sending a HAVE for it
// this helps us tidily close things
if ( num_pieces%8 == 0 ){
num_pieces--;
}
if ( !is_seed ){
int missing = random.nextInt( num_pieces/2 ) + 5;
for (int i=0;i<missing;i++){
missing_pieces.add( new Integer( random.nextInt( num_pieces )));
}
}
sendHandshake();
sendBitfield();
connection.getIncomingMessageQueue().getDecoder().resumeDecoding();
}else if ( message_id.equals( BTMessage.ID_BT_BITFIELD )){
bitfield_received = true;
BTBitfield bitfield = (BTBitfield)message;
ByteBuffer bb = bitfield.getBitfield().getBuffer((byte)0);
byte[] contents = new byte[bb.remaining()];
bb.get( contents );
}else if ( message_id.equals( BTMessage.ID_BT_HAVE )){
BTHave have = (BTHave)message;
if ( have.getPieceNumber() == num_pieces ){
synchronized( sessions ){
closing = true;
}
close();
}
}
return( true );
}finally{
message.destroy();
}
}
public final void
protocolBytesReceived(
int byte_count )
{
}
public final void
dataBytesReceived(
int byte_count )
{
}
public boolean
isPriority()
{
return true;
}
});
connection.getOutgoingMessageQueue().registerQueueListener(
new OutgoingMessageQueue.MessageQueueListener()
{
public final boolean
messageAdded(
Message message )
{
return( true );
}
public final void
messageQueued(
Message message )
{
}
public final void
messageRemoved(
Message message )
{
}
public final void
messageSent(
Message message )
{
log( "Outgoing message sent: " + message.getID());
}
public final void
protocolBytesSent(
int byte_count )
{
}
public final void
dataBytesSent(
int byte_count )
{
}
public void
flush()
{
}
});
connection.startMessageProcessing();
if ( initiator ){
sendHandshake();
}
}
protected void
sendHandshake()
{
if ( !handshake_sent ){
handshake_sent = true;
connection.getOutgoingMessageQueue().addMessage(
new BTHandshake( info_hash, peer_id, false, BTMessageFactory.MESSAGE_VERSION_INITIAL ),
false );
}
}
protected void
sendHave(
int piece_number )
{
BTHave message = new BTHave( piece_number, BTMessageFactory.MESSAGE_VERSION_INITIAL );
OutgoingMessageQueue out_q = connection.getOutgoingMessageQueue();
out_q.addMessage( message, false );
out_q.flush();
}
protected void
sendBitfield()
{
if ( !bitfield_sent ){
bitfield_sent = true;
byte[] bits = new byte[( num_pieces + 7 ) /8];
int pos = 0;
int i = 0;
int bToSend = 0;
for (; i <num_pieces; i++ ){
if ((i %8) ==0){
bToSend =0;
}
bToSend = bToSend << 1;
boolean has_piece = !missing_pieces.contains( new Integer(i));
if ( has_piece ){
bToSend += 1;
}
if ((i %8) ==7){
bits[pos++] = (byte)bToSend;
}
}
if ((i %8) !=0){
bToSend = bToSend << (8 - (i % 8));
bits[pos++] = (byte)bToSend;
}
DirectByteBuffer buffer = new DirectByteBuffer( ByteBuffer.wrap( bits ));
connection.getOutgoingMessageQueue().addMessage(
new BTBitfield( buffer, BTMessageFactory.MESSAGE_VERSION_INITIAL ),
false );
}
}
protected void
close()
{
synchronized( sessions ){
sessions.remove( this );
if ( !closing ){
closing = true;
}else{
closed = true;
}
}
if ( closed ){
log( "Closing connection" );
connection.close( null );
}else{
sendHave( num_pieces );
new DelayedEvent(
"NetStatus:delayClose",
5000,
new AERunnable()
{
public void
runSupport()
{
if ( !closed ){
close();
}
}
});
}
checkCompletion();
}
public String
getProtocolString()
{
String str = "";
if ( connected ){
str = "connected";
str += addSent( "hand", handshake_sent );
str += addRecv( "hand", handshake_received );
str += addSent( "bitf", bitfield_sent );
str += addRecv( "bitf", bitfield_received );
}else{
str = "not connected";
}
return( str );
}
protected String
addSent(
String str,
boolean ok )
{
if ( ok ){
return( ", " + str + " sent" );
}else{
return( ", " + str + " !sent" );
}
}
protected String
addRecv(
String str,
boolean ok )
{
if ( ok ){
return( ", " + str + " recv" );
}else{
return( ", " + str + " !recv" );
}
}
protected String
getLogPrefix()
{
return( "(" + (initiator?"L":"R") + (is_seed?"S":"L") + " " + session_id + ") " );
}
protected void
log(
String str )
{
NetStatusProtocolTesterBT.this.log( getLogPrefix() + str );
}
protected void
logError(
String str )
{
NetStatusProtocolTesterBT.this.logError( getLogPrefix() + str );
}
protected void
logError(
String str,
Throwable e )
{
NetStatusProtocolTesterBT.this.logError( getLogPrefix() + str, e );
}
}
}