2009-11-21 Tatsuhiro Tsujikawa <t-tujikawa@users.sourceforge.net>

	Initial support of Extension for Peers to Send Metadata
	Files(BEP9). Currently aria2 only serves metadata and cannot get
	metadata from swarm.
	* src/BtConstants.h
	* src/DefaultBtInteractive.cc
	* src/DefaultExtensionMessageFactory.cc
	* src/DefaultExtensionMessageFactory.h
	* src/ExtensionMessage.h
	* src/ExtensionMessageRegistry.h
	* src/HandshakeExtensionMessage.cc
	* src/HandshakeExtensionMessage.h
	* src/Makefile.am
	* src/PeerConnection.h
	* src/PeerInteractionCommand.cc
	* src/UTMetadataDataExtensionMessage.cc
	* src/UTMetadataDataExtensionMessage.h
	* src/UTMetadataExtensionMessage.cc
	* src/UTMetadataExtensionMessage.h
	* src/UTMetadataRejectExtensionMessage.cc
	* src/UTMetadataRejectExtensionMessage.h
	* src/UTMetadataRequestExtensionMessage.cc
	* src/UTMetadataRequestExtensionMessage.h
	* src/bittorrent_helper.cc
	* src/bittorrent_helper.h
	* test/BittorrentHelperTest.cc
	* test/DefaultExtensionMessageFactoryTest.cc
	* test/HandshakeExtensionMessageTest.cc
	* test/Makefile.am
	* test/UTMetadataDataExtensionMessageTest.cc
	* test/UTMetadataRejectExtensionMessageTest.cc
	* test/UTMetadataRequestExtensionMessageTest.cc

1 files changed, 101 insertions, 0 deletions

diff --git a/src/UTMetadataRequestExtensionMessage.cc b/src/UTMetadataRequestExtensionMessage.cc
new file mode 100644
index 00000000..92de8fae
--- /dev/null
+++ b/src/UTMetadataRequestExtensionMessage.cc
@@ -0,0 +1,101 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2009 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 --> */
+#include "UTMetadataRequestExtensionMessage.h"
+#include "BDE.h"
+#include "bencode.h"
+#include "util.h"
+#include "a2functional.h"
+#include "bittorrent_helper.h"
+#include "DlAbortEx.h"
+#include "StringFormat.h"
+#include "BtMessageFactory.h"
+#include "BtMessageDispatcher.h"
+#include "Peer.h"
+#include "UTMetadataRejectExtensionMessage.h"
+#include "UTMetadataDataExtensionMessage.h"
+#include "BtConstants.h"
+#include "DownloadContext.h"
+#include "BtMessage.h"
+
+namespace aria2 {
+
+UTMetadataRequestExtensionMessage::UTMetadataRequestExtensionMessage
+(uint8_t extensionMessageID):UTMetadataExtensionMessage(extensionMessageID) {}
+
+std::string UTMetadataRequestExtensionMessage::getBencodedData()
+{
+  BDE dict = BDE::dict();
+  dict["msg_type"] = 0;
+  dict["piece"] = _index;
+  return bencode::encode(dict);
+}
+
+std::string UTMetadataRequestExtensionMessage::toString() const
+{
+  return strconcat("ut_metadata request piece=", util::uitos(_index));
+}
+
+void UTMetadataRequestExtensionMessage::doReceivedAction()
+{
+  const BDE& attrs = _dctx->getAttribute(bittorrent::BITTORRENT);
+  uint8_t id = _peer->getExtensionMessageID("ut_metadata");
+  if(!attrs.containsKey(bittorrent::METADATA)) {
+    SharedHandle<UTMetadataRejectExtensionMessage> m
+      (new UTMetadataRejectExtensionMessage(id));
+    m->setIndex(_index);
+    SharedHandle<BtMessage> msg = _messageFactory->createBtExtendedMessage(m);
+    _dispatcher->addMessageToQueue(msg);
+  }else if(_index*METADATA_PIECE_SIZE <
+	   (size_t)attrs[bittorrent::METADATA_SIZE].i()){
+    SharedHandle<UTMetadataDataExtensionMessage> m
+      (new UTMetadataDataExtensionMessage(id));
+    m->setIndex(_index);
+    m->setTotalSize(attrs[bittorrent::METADATA_SIZE].i());
+    const BDE& metadata = attrs[bittorrent::METADATA];
+    std::string::const_iterator begin =
+      metadata.s().begin()+_index*METADATA_PIECE_SIZE;
+    std::string::const_iterator end =
+      (_index+1)*METADATA_PIECE_SIZE <= metadata.s().size()?
+      metadata.s().begin()+(_index+1)*METADATA_PIECE_SIZE:metadata.s().end();
+    m->setData(std::string(begin, end));
+    SharedHandle<BtMessage> msg = _messageFactory->createBtExtendedMessage(m);
+    _dispatcher->addMessageToQueue(msg);
+  } else {
+    throw DL_ABORT_EX
+      (StringFormat("Metadata piece index is too big. piece=%d", _index).str());
+  }
+}
+
+} // namespace aria2