src/TrackerUpdateCommand.cc

@@ -0,0 +1,175 @@
+/* <!-- copyright */
+/*
+ * aria2 - a simple utility for downloading files faster
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+/* copyright --> */
+#include "TrackerUpdateCommand.h"
+#include "LogFactory.h"
+#include "MetaFileUtil.h"
+#include "DlAbortEx.h"
+#include "message.h"
+#include "PeerInitiateConnectionCommand.h"
+#include "SleepCommand.h"
+#include "Util.h"
+#include <netinet/in.h>
+
+TrackerUpdateCommand::TrackerUpdateCommand(int cuid, TorrentDownloadEngine*e):Command(cuid), e(e) {
+  logger = LogFactory::getInstance();
+}
+
+TrackerUpdateCommand::~TrackerUpdateCommand() {}
+
+bool TrackerUpdateCommand::prepareForRetry() {
+  Command* sleepCommand = new SleepCommand(cuid, e, this, 5);
+  e->commands.push(sleepCommand);
+  return false;
+}
+
+char* TrackerUpdateCommand::getTrackerResponse(int& trackerResponseLength) {
+  int maxBufLength = 2048;
+  char* buf = new char[maxBufLength];
+  int bufLength = 0;
+  char data[2048];
+  try {
+    while(1) {
+      int dataLength = e->segmentMan->diskWriter->readData(data, sizeof(data), bufLength);
+      if(bufLength+dataLength >= maxBufLength) {
+	maxBufLength = Util::expandBuffer(&buf, bufLength, bufLength+dataLength);
+      }
+      memcpy(buf+bufLength, data, dataLength);
+      bufLength += dataLength;
+      if(dataLength != sizeof(data)) {
+	break;
+      }
+    }
+    trackerResponseLength = bufLength;
+    return buf;
+  } catch(Exception* e) {
+    delete [] buf;
+    throw;
+  }
+}
+
+bool TrackerUpdateCommand::execute() {
+  if(!e->segmentMan->finished()) {
+    return prepareForRetry();
+  }
+  MetaEntry* entry = NULL;
+  char* trackerResponse = NULL;
+  int trackerResponseLength = 0;
+  try {
+    try {
+      trackerResponse = getTrackerResponse(trackerResponseLength);
+      entry = MetaFileUtil::bdecoding(trackerResponse,
+				      trackerResponseLength);
+      if(trackerResponse != NULL) {
+	delete [] trackerResponse;
+      }
+    } catch(Exception* e) {
+      if(trackerResponse != NULL) {
+	delete [] trackerResponse;
+      }
+      throw;
+    }
+    Dictionary* response = (Dictionary*)entry;
+    Data* failureReason = (Data*)response->get("failure reason");
+    if(failureReason != NULL) {
+      throw new DlAbortEx("Tracker returned failure reason: %s", failureReason->toString().c_str());
+    }
+    Data* warningMessage = (Data*)response->get("warning message");
+    if(warningMessage != NULL) {
+      logger->warn(MSG_TRACKER_WARNING_MESSAGE, warningMessage->toString().c_str());
+    }
+    Data* trackerId = (Data*)response->get("tracker id");
+    if(trackerId != NULL) {
+      e->torrentMan->trackerId = trackerId->toString();
+      logger->debug("Tracker ID:%s", e->torrentMan->trackerId.c_str());
+    }
+    Data* interval = (Data*)response->get("interval");
+    if(interval != NULL) {
+      e->torrentMan->interval = interval->toInt();
+      logger->debug("interval:%d", e->torrentMan->interval);
+    }
+    Data* minInterval = (Data*)response->get("min interval");
+    if(minInterval != NULL) {
+      e->torrentMan->minInterval = minInterval->toInt();
+      logger->debug("min interval:%d", e->torrentMan->minInterval);
+    }
+    if(e->torrentMan->minInterval > e->torrentMan->interval) {
+      e->torrentMan->minInterval = e->torrentMan->interval;
+    }
+    Data* complete = (Data*)response->get("complete");
+    if(complete != NULL) {
+      e->torrentMan->complete = complete->toInt();
+      logger->debug("complete:%d", e->torrentMan->complete);
+    }
+    Data* incomplete = (Data*)response->get("incomplete");
+    if(incomplete != NULL) {
+      e->torrentMan->incomplete = incomplete->toInt();
+      logger->debug("incomplete:%d", e->torrentMan->incomplete);
+    } 
+    Data* peers = (Data*)response->get("peers");
+    if(peers != NULL) {
+      for(int i = 0; i < peers->getLen(); i += 6) {
+	unsigned int ipaddr1 = (unsigned char)*(peers->getData()+i);
+	unsigned int ipaddr2 = (unsigned char)*(peers->getData()+i+1);
+	unsigned int ipaddr3 = (unsigned char)*(peers->getData()+i+2);
+	unsigned int ipaddr4 = (unsigned char)*(peers->getData()+i+3);
+	unsigned int port = ntohs(*(unsigned short int*)(peers->getData()+i+4));
+	char ipaddr[16];
+	
+	snprintf(ipaddr, sizeof(ipaddr), "%d.%d.%d.%d",
+		 ipaddr1, ipaddr2, ipaddr3, ipaddr4);
+	Peer* peer = new Peer(ipaddr, port, e->torrentMan->pieceLength,
+			      e->torrentMan->getTotalLength());
+	if(e->torrentMan->addPeer(peer)) {
+	  logger->debug("adding peer %s:%d", peer->ipaddr.c_str(), peer->port);
+	} else {
+	  delete peer;
+	}
+    }
+    } else {
+      logger->info("no peer list received.");
+    }
+    while(e->torrentMan->isPeerAvailable() &&
+	  e->torrentMan->connections < MAX_PEER_UPDATE) {
+      Peer* peer = e->torrentMan->getPeer();
+      int newCuid =  e->torrentMan->getNewCuid();
+      peer->cuid = newCuid;
+      PeerInitiateConnectionCommand* command = new PeerInitiateConnectionCommand(newCuid, peer, e);
+      e->commands.push(command);
+      logger->debug("adding new command CUID#%d", newCuid);
+    }
+    if(e->torrentMan->req->getTrackerEvent() == Request::STARTED) {
+      e->torrentMan->req->setTrackerEvent(Request::AUTO);
+    }
+  } catch(Exception* err) {
+    logger->error("CUID#%d - Error occurred while processing tracker response.", cuid, err);
+    delete(err);
+  }
+  if(entry != NULL) {
+    delete entry;
+  }
+  e->torrentMan->trackers = 0;
+
+  e->segmentMan->init();
+
+  return prepareForRetry();
+}
+

src/TrackerUpdateCommand.h

@@ -0,0 +1,42 @@
+/* <!-- copyright */
+/*
+ * aria2 - a simple utility for downloading files faster
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+/* copyright --> */
+#ifndef _D_TRACKER_UPDATE_COMMAND_H_
+#define _D_TRACKER_UPDATE_COMMAND_H_
+
+#include "Command.h"
+#include "TorrentDownloadEngine.h"
+#include "Logger.h"
+
+class TrackerUpdateCommand : public Command {
+private:
+  TorrentDownloadEngine* e;
+  const Logger* logger;
+  bool prepareForRetry();
+  char* getTrackerResponse(int& trackerResponseLength);
+public:
+  TrackerUpdateCommand(int cuid, TorrentDownloadEngine* e);
+  virtual ~TrackerUpdateCommand();
+
+  bool execute();
+};
+
+#endif // _D_TRACKER_UPDATE_COMMAND_H_