2008-02-01 Tatsuhiro Tsujikawa <tujikawa at rednoah dot com>

	Added DHT functionality, compatible with mainline.
	DHT is disabled by default. To enable it, give --enable-dht to 
aria2c.
	You may need to specify entry point to DHT network using
	--dht-entry-point. DHT uses UDP port to listen incoming message.
	Use --dht-listen-port to specify port number. Make sure that 
your
	firewall configuration can pass through UDP traffic to the port.
	The routing table is saved in $HOME/.aria2/dht.dat.
	* src/DHT*
	* src/BNode.{h, cc}
	* src/PeerInteractionCommand.cc: enable DHT functionality for a
	particular torrent.
	* src/Data.cc: Rewritten ctor.
	* src/OptionHandlerFactory.cc: Added --enable-dht, 
--dht-listen-port,
	--dht-entry-point.
	* src/DefaultBtInteractive.cc: Send port message if dht is 
enabled.
	* src/RequestGroup.cc: Initialize DHT functionality. When 
download
	ends, remove BtContext from DHTPeerAnnounceStorage.
	* src/BtPortMessage.{h, cc}: Rewritten.
	* src/message.h
	* src/OptionHandlerImpl.cc
	* src/option_processing.cc: Added --enable-dht, 
--dht-listen-port,
	--dht-entry-point.
	* src/Dictionary.{h, cc} (remove): New function.
	* src/prefs.h
	* src/DefaultBtMessageFactory.h
	* src/BtHandshakeMessage.cc
	* src/ActivePeerConnectionCommand.cc
	* src/SocketCore.{h, cc}: Added datagram socket support.
	* src/DefaultBtMessageFactory.cc
	* src/BtSetup.cc: Add BtContext to DHTPeerAnnounceStorage here.
	Create DHT commands.
	* src/BtMessageFactory.h
	* src/PeerMessageUtil.{h, cc}

1 files changed, 168 insertions, 0 deletions

diff --git a/src/DHTMessageFactoryImpl.h b/src/DHTMessageFactoryImpl.h
new file mode 100644
index 00000000..1176740c
--- /dev/null
+++ b/src/DHTMessageFactoryImpl.h
@@ -0,0 +1,168 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2006 Tatsuhiro Tsujikawa
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#ifndef _D_DHT_MESSAGE_FACTORY_IMPL_H_
+#define _D_DHT_MESSAGE_FACTORY_IMPL_H_
+
+#include "DHTMessageFactory.h"
+#include "DHTRoutingTableDecl.h"
+#include "DHTConnectionDecl.h"
+#include "DHTMessageDispatcherDecl.h"
+#include "DHTPeerAnnounceStorageDecl.h"
+#include "DHTTokenTrackerDecl.h"
+
+class Logger;
+class Data;
+class DHTAbstractMessage;
+
+class DHTMessageFactoryImpl:public DHTMessageFactory {
+private:
+  DHTNodeHandle _localNode;
+
+  WeakHandle<DHTConnection> _connection;
+
+  WeakHandle<DHTMessageDispatcher> _dispatcher;
+
+  WeakHandle<DHTRoutingTable> _routingTable;
+  
+  WeakHandle<DHTPeerAnnounceStorage> _peerAnnounceStorage;
+
+  WeakHandle<DHTTokenTracker> _tokenTracker;
+
+  const Logger* _logger;
+  
+  // search node in routingTable. If it is not found, create new one.
+  DHTNodeHandle getRemoteNode(const unsigned char* id, const string& ipaddr, uint16_t port) const;
+
+  void validateID(const Data* id) const;
+
+  void validateIDMatch(const unsigned char* expected, const unsigned char* actual) const;
+
+  void validatePort(const Data* i) const;
+
+  DHTNodes extractNodes(const char* src, size_t length);
+
+  void setCommonProperty(const SharedHandle<DHTAbstractMessage>& m);
+
+public:
+  DHTMessageFactoryImpl();
+
+  virtual ~DHTMessageFactoryImpl();
+
+  virtual DHTMessageHandle
+  createQueryMessage(const Dictionary* d,
+		     const string& ipaddr, uint16_t port);
+
+  virtual DHTMessageHandle
+  createResponseMessage(const string& messageType,
+			const Dictionary* d,
+			const DHTNodeHandle& remoteNode);
+
+  virtual DHTMessageHandle
+  createPingMessage(const DHTNodeHandle& remoteNode,
+		    const string& transactionID = "");
+
+  virtual DHTMessageHandle
+  createPingReplyMessage(const DHTNodeHandle& remoteNode,
+			 const unsigned char* id,
+			 const string& transactionID);
+
+  virtual DHTMessageHandle
+  createFindNodeMessage(const DHTNodeHandle& remoteNode,
+			const unsigned char* targetNodeID,
+			const string& transactionID = "");
+
+  DHTMessageHandle
+  createFindNodeReplyMessage(const DHTNodeHandle& remoteNode,
+			     const Dictionary* d,
+			     const string& transactionID);
+
+
+  virtual DHTMessageHandle
+  createFindNodeReplyMessage(const DHTNodeHandle& remoteNode,
+			     const DHTNodes& closestKNodes,
+			     const string& transactionID);
+
+  virtual DHTMessageHandle
+  createGetPeersMessage(const DHTNodeHandle& remoteNode,
+			const unsigned char* infoHash,
+			const string& transactionID = "");
+
+  virtual DHTMessageHandle
+  createGetPeersReplyMessage(const DHTNodeHandle& remoteNode,
+			     const DHTNodes& closestKNodes,
+			     const string& token,
+			     const string& transactionID);
+
+  DHTMessageHandle
+  createGetPeersReplyMessageWithNodes(const DHTNodeHandle& remoteNode,
+				      const Dictionary* d,
+				      const string& transactionID);
+
+  virtual DHTMessageHandle
+  createGetPeersReplyMessage(const DHTNodeHandle& remoteNode,
+			     const Peers& peers,
+			     const string& token,
+			     const string& transactionID);
+
+  DHTMessageHandle
+  createGetPeersReplyMessageWithValues(const DHTNodeHandle& remoteNode,
+				       const Dictionary* d,
+				       const string& transactionID);
+
+  virtual DHTMessageHandle
+  createAnnouncePeerMessage(const DHTNodeHandle& remoteNode,
+			    const unsigned char* infoHash,
+			    uint16_t tcpPort,
+			    const string& token,
+			    const string& transactionID = "");
+
+  virtual DHTMessageHandle
+  createAnnouncePeerReplyMessage(const DHTNodeHandle& remoteNode,
+				 const string& transactionID);
+
+  void setRoutingTable(const DHTRoutingTableHandle& routingTable);
+
+  void setConnection(const DHTConnectionHandle& connection);
+
+  void setMessageDispatcher(const DHTMessageDispatcherHandle& dispatcher);
+  
+  void setPeerAnnounceStorage(const DHTPeerAnnounceStorageHandle& storage);
+
+  void setTokenTracker(const DHTTokenTrackerHandle& tokenTracker);
+
+  void setLocalNode(const DHTNodeHandle& localNode);
+};
+
+#endif // _D_DHT_MESSAGE_FACTORY_IMPL_H_