/**
* Bytes not yet in storage. Does NOT account for skipped files.
*
* @return exact value. or -1 if no storage yet. getNeeded() * pieceLength(0) isn't accurate if
* last piece is still needed.
* @since 0.8.9
*/
public long getRemainingLength() {
if (meta != null && storage != null) {
long needed = storage.needed();
long length0 = meta.getPieceLength(0);
long remaining = needed * length0;
// fixup if last piece is needed
int last = meta.getPieces() - 1;
if (last != 0 && !storage.getBitField().get(last))
remaining -= length0 - meta.getPieceLength(last);
return remaining;
}
return -1;
}
/**
* Switch from magnet mode to normal mode. If we already have the metainfo, this does nothing.
*
* @param meta non-null
* @since 0.8.4
*/
public void setMetaInfo(MetaInfo meta) {
if (metainfo != null) return;
BitField oldBF = bitfield;
if (oldBF != null) {
if (oldBF.size() != meta.getPieces())
// fix bitfield, it was too big by 1-7 bits
bitfield = new BitField(oldBF.getFieldBytes(), meta.getPieces());
// else no extra
} else {
// it will be initialized later
// bitfield = new BitField(meta.getPieces());
}
metainfo = meta;
if (bitfield != null && bitfield.count() > 0) setInteresting(true);
}
void bitfieldMessage(byte[] bitmap) {
synchronized (this) {
if (_log.shouldLog(Log.DEBUG)) _log.debug(peer + " rcv bitfield");
if (bitfield != null) {
// XXX - Be liberal in what you accept?
if (_log.shouldLog(Log.WARN)) _log.warn("Got unexpected bitfield message from " + peer);
return;
}
// XXX - Check for weird bitfield and disconnect?
// FIXME will have to regenerate the bitfield after we know exactly
// how many pieces there are, as we don't know how many spare bits there are.
if (metainfo == null) bitfield = new BitField(bitmap, bitmap.length * 8);
else bitfield = new BitField(bitmap, metainfo.getPieces());
}
if (metainfo == null) return;
boolean interest = listener.gotBitField(peer, bitfield);
setInteresting(interest);
if (bitfield.complete() && !interest) {
// They are seeding and we are seeding,
// why did they contact us? (robert)
// Dump them quick before we send our whole bitmap
if (_log.shouldLog(Log.WARN)) _log.warn("Disconnecting seed that connects to seeds: " + peer);
peer.disconnect(true);
}
}
/**
* Called when the PeerCoordinator got the MetaInfo via magnet. CoordinatorListener. Create the
* storage, tell SnarkManager, and give the storage back to the coordinator.
*
* @throws RuntimeException via fatal()
* @since 0.8.4
*/
public void gotMetaInfo(PeerCoordinator coordinator, MetaInfo metainfo) {
try {
String base = Storage.filterName(metainfo.getName());
File baseFile;
if (_util.getFilesPublic()) baseFile = new File(rootDataDir, base);
else baseFile = new SecureFile(rootDataDir, base);
// The following two may throw IOE...
storage = new Storage(_util, baseFile, metainfo, this, false);
storage.check();
// ... so don't set meta until here
meta = metainfo;
if (completeListener != null) {
String newName = completeListener.gotMetaInfo(this);
if (newName != null) torrent = newName;
// else some horrible problem
}
coordinator.setStorage(storage);
} catch (IOException ioe) {
if (storage != null) {
try {
storage.close();
} catch (IOException ioee) {
}
}
fatal("Could not check or create storage", ioe);
}
}
/**
* Does not account (i.e. includes) for skipped files.
*
* @return number of pieces still needed (magnet mode or not), or -1 if unknown
* @since 0.8.4
*/
public long getNeeded() {
if (storage != null) return storage.needed();
if (meta != null)
// FIXME subtract chunks we have
return meta.getTotalLength();
// FIXME fake
return -1;
}
void requestMessage(int piece, int begin, int length) {
if (_log.shouldLog(Log.DEBUG))
_log.debug(peer + " rcv request(" + piece + ", " + begin + ", " + length + ") ");
if (metainfo == null) return;
if (choking) {
if (_log.shouldLog(Log.INFO)) _log.info("Request received, but choking " + peer);
return;
}
// Sanity check
if (piece < 0
|| piece >= metainfo.getPieces()
|| begin < 0
|| begin > metainfo.getPieceLength(piece)
|| length <= 0
|| length > MAX_PARTSIZE) {
// XXX - Protocol error -> disconnect?
if (_log.shouldLog(Log.WARN))
_log.warn(
"Got strange 'request: "
+ piece
+ ", "
+ begin
+ ", "
+ length
+ "' message from "
+ peer);
return;
}
// Limit total pipelined requests to MAX_PIPELINE bytes
// to conserve memory and prevent DOS
// Todo: limit number of requests also? (robert 64 x 4KB)
if (out.queuedBytes() + length > MAX_PIPELINE_BYTES) {
if (_log.shouldLog(Log.WARN))
_log.warn("Discarding request over pipeline limit from " + peer);
return;
}
if (_log.shouldLog(Log.DEBUG))
_log.debug("Queueing (" + piece + ", " + begin + ", " + length + ")" + " to " + peer);
// don't load the data into mem now, let PeerConnectionOut do it
out.sendPiece(piece, begin, length, this);
}
/** @since 0.8.5 */
public static void main(String[] args) {
if (args.length <= 0) {
System.err.println("Usage: MetaInfo files...");
return;
}
for (int i = 0; i < args.length; i++) {
InputStream in = null;
try {
in = new FileInputStream(args[i]);
MetaInfo meta = new MetaInfo(in);
System.out.println(args[i] + " InfoHash: " + I2PSnarkUtil.toHex(meta.getInfoHash()));
} catch (IOException ioe) {
System.err.println("Error in file " + args[i] + ": " + ioe);
} finally {
try {
if (in != null) in.close();
} catch (IOException ioe) {
}
}
}
}
void haveMessage(int piece) {
if (_log.shouldLog(Log.DEBUG)) _log.debug(peer + " rcv have(" + piece + ")");
// FIXME we will lose these until we get the metainfo
if (metainfo == null) return;
// Sanity check
if (piece < 0 || piece >= metainfo.getPieces()) {
// XXX disconnect?
if (_log.shouldLog(Log.WARN))
_log.warn("Got strange 'have: " + piece + "' message from " + peer);
return;
}
synchronized (this) {
// Can happen if the other side never send a bitfield message.
if (bitfield == null) bitfield = new BitField(metainfo.getPieces());
bitfield.set(piece);
}
if (listener.gotHave(peer, piece)) setInteresting(true);
}
/** @since 0.8.2 */
void extensionMessage(int id, byte[] bs) {
if (metainfo != null
&& metainfo.isPrivate()
&& (id == ExtensionHandler.ID_METADATA || id == ExtensionHandler.ID_PEX)) {
// shouldn't get this since we didn't advertise it but they could send it anyway
if (_log.shouldLog(Log.WARN)) _log.warn("Private torrent, ignoring ext msg " + id);
return;
}
ExtensionHandler.handleMessage(peer, listener, id, bs);
// Peer coord will get metadata from MagnetState,
// verify, and then call gotMetaInfo()
listener.gotExtension(peer, id, bs);
}
public void run() {
// XXX - Support other IPs
String announce = meta.getAnnounce();
String infoHash = urlencode(meta.getInfoHash());
String peerID = urlencode(coordinator.getID());
long uploaded = coordinator.getUploaded();
long downloaded = coordinator.getDownloaded();
long left = coordinator.getLeft();
boolean completed = (left == 0);
try {
boolean started = false;
while (!started) {
try {
// Send start.
TrackerInfo info =
doRequest(announce, infoHash, peerID, uploaded, downloaded, left, STARTED_EVENT);
Iterator it = info.getPeers().iterator();
while (it.hasNext()) coordinator.addPeer((Peer) it.next());
started = true;
} catch (IOException ioe) {
// Probably not fatal (if it doesn't last to long...)
Snark.debug(
"WARNING: Could not contact tracker at '" + announce + "': " + ioe, Snark.WARNING);
}
if (!started && !stop) {
Snark.debug(" Retrying in one minute...", Snark.DEBUG);
try {
// Sleep one minutes...
Thread.sleep(60 * 1000);
} catch (InterruptedException interrupt) {
// ignore
}
}
}
while (!stop) {
try {
// Sleep some minutes...
Thread.sleep(SLEEP * 60 * 1000);
} catch (InterruptedException interrupt) {
// ignore
}
if (stop) break;
uploaded = coordinator.getUploaded();
downloaded = coordinator.getDownloaded();
left = coordinator.getLeft();
// First time we got a complete download?
String event;
if (!completed && left == 0) {
completed = true;
event = COMPLETED_EVENT;
} else event = NO_EVENT;
// Only do a request when necessary.
if (event == COMPLETED_EVENT
|| coordinator.needPeers()
|| System.currentTimeMillis() > lastRequestTime + interval) {
try {
TrackerInfo info =
doRequest(announce, infoHash, peerID, uploaded, downloaded, left, event);
Iterator it = info.getPeers().iterator();
while (it.hasNext()) coordinator.addPeer((Peer) it.next());
} catch (IOException ioe) {
// Probably not fatal (if it doesn't last to long...)
Snark.debug(
"WARNING: Could not contact tracker at '" + announce + "': " + ioe, Snark.WARNING);
}
}
}
} catch (Throwable t) {
Snark.debug("TrackerClient: " + t, Snark.ERROR);
t.printStackTrace();
} finally {
try {
TrackerInfo info =
doRequest(announce, infoHash, peerID, uploaded, downloaded, left, STOPPED_EVENT);
} catch (IOException ioe) {
/* ignored */
}
}
}
/**
* Adds a new request to the outstanding requests list. Then send interested if we weren't. Then
* send new requests if not choked. If nothing to request, send not interested if we were.
*
* <p>This is called from several places:
*
* <pre>
* By getOustandingRequest() when the first part of a chunk comes in
* By havePiece() when somebody got a new piece completed
* By chokeMessage() when we receive an unchoke
* By setInteresting() when we are now interested
* By PeerCoordinator.updatePiecePriorities()
* </pre>
*/
synchronized void addRequest() {
// no bitfield yet? nothing to request then.
if (bitfield == null) return;
if (metainfo == null) return;
boolean more_pieces = true;
while (more_pieces) {
more_pieces = outstandingRequests.size() < MAX_PIPELINE;
// We want something and we don't have outstanding requests?
if (more_pieces && lastRequest == null) {
// we have nothing in the queue right now
if (!interesting) {
// If we need something, set interesting but delay pulling
// a request from the PeerCoordinator until unchoked.
if (listener.needPiece(this.peer, bitfield)) {
setInteresting(true);
if (_log.shouldLog(Log.DEBUG))
_log.debug(
peer
+ " addRequest() we need something, setting interesting, delaying requestNextPiece()");
} else {
if (_log.shouldLog(Log.DEBUG)) _log.debug(peer + " addRequest() needs nothing");
}
return;
}
if (choked) {
// If choked, delay pulling
// a request from the PeerCoordinator until unchoked.
if (_log.shouldLog(Log.DEBUG))
_log.debug(peer + " addRequest() we are choked, delaying requestNextPiece()");
return;
}
// huh? rv unused
more_pieces = requestNextPiece();
} else if (more_pieces) // We want something
{
int pieceLength;
boolean isLastChunk;
pieceLength = metainfo.getPieceLength(lastRequest.getPiece());
isLastChunk = lastRequest.off + lastRequest.len == pieceLength;
// Last part of a piece?
if (isLastChunk) more_pieces = requestNextPiece();
else {
PartialPiece nextPiece = lastRequest.getPartialPiece();
int nextBegin = lastRequest.off + PARTSIZE;
int maxLength = pieceLength - nextBegin;
int nextLength = maxLength > PARTSIZE ? PARTSIZE : maxLength;
Request req = new Request(nextPiece, nextBegin, nextLength);
outstandingRequests.add(req);
if (!choked) out.sendRequest(req);
lastRequest = req;
}
}
}
// failsafe
// However this is bad as it thrashes the peer when we change our mind
// Ticket 691 cause here?
if (interesting && lastRequest == null && outstandingRequests.isEmpty()) setInteresting(false);
if (_log.shouldLog(Log.DEBUG)) _log.debug(peer + " requests " + outstandingRequests);
}
/**
* @return always will be valid even in magnet mode
* @since 0.8.4
*/
public byte[] getInfoHash() {
// should always be the same
if (meta != null) return meta.getInfoHash();
return infoHash;
}
/**
* @return number of pieces
* @since 0.8.4
*/
public int getPieces() {
if (meta != null) return meta.getPieces();
// FIXME else return metainfo pieces if available
return -1;
}
/**
* @param p the piece number
* @return metainfo piece length or 16K if fetching magnet
* @since 0.8.4
*/
public int getPieceLength(int p) {
if (meta != null) return meta.getPieceLength(p);
return 16 * 1024;
}
/**
* @return total of all torrent files, or total of metainfo file if fetching magnet, or -1
* @since 0.8.4
*/
public long getTotalLength() {
if (meta != null) return meta.getTotalLength();
// FIXME else return metainfo length if available
return -1;
}
/**
* Runs the connection to the other peer. This method does not return until the connection is
* terminated.
*
* <p>When the connection is correctly started the connected() method of the given PeerListener is
* called. If the connection ends or the connection could not be setup correctly the
* disconnected() method is called.
*
* <p>If the given BitField is non-null it is send to the peer as first message.
*/
public void runConnection(
I2PSnarkUtil util, PeerListener listener, BitField bitfield, MagnetState mState) {
if (state != null) throw new IllegalStateException("Peer already started");
if (_log.shouldLog(Log.DEBUG))
_log.debug("Running connection to " + peerID.toString(), new Exception("connecting"));
try {
// Do we need to handshake?
if (din == null) {
// Outgoing connection
sock = util.connect(peerID);
if (_log.shouldLog(Log.DEBUG)) _log.debug("Connected to " + peerID + ": " + sock);
if ((sock == null) || (sock.isClosed())) {
throw new IOException("Unable to reach " + peerID);
}
InputStream in = sock.getInputStream();
OutputStream out = sock.getOutputStream();
byte[] id = handshake(in, out);
byte[] expected_id = peerID.getID();
if (expected_id == null) {
peerID.setID(id);
} else if (Arrays.equals(expected_id, id)) {
if (_log.shouldLog(Log.DEBUG))
_log.debug("Handshake got matching IDs with " + toString());
} else {
throw new IOException(
"Unexpected peerID '"
+ PeerID.idencode(id)
+ "' expected '"
+ PeerID.idencode(expected_id)
+ "'");
}
} else {
// Incoming connection
if (_log.shouldLog(Log.DEBUG))
_log.debug("Already have din [" + sock + "] with " + toString());
}
// bad idea?
if (metainfo == null && (options & OPTION_EXTENSION) == 0) {
if (_log.shouldLog(Log.INFO))
_log.info("Peer does not support extensions and we need metainfo, dropping");
throw new IOException("Peer does not support extensions and we need metainfo, dropping");
}
PeerConnectionIn in = new PeerConnectionIn(this, din);
PeerConnectionOut out = new PeerConnectionOut(this, dout);
PeerState s = new PeerState(this, listener, metainfo, in, out);
if ((options & OPTION_EXTENSION) != 0) {
if (_log.shouldLog(Log.DEBUG))
_log.debug("Peer supports extensions, sending reply message");
int metasize = metainfo != null ? metainfo.getInfoBytes().length : -1;
out.sendExtension(0, ExtensionHandler.getHandshake(metasize));
}
if ((options & OPTION_I2P_DHT) != 0 && util.getDHT() != null) {
if (_log.shouldLog(Log.DEBUG)) _log.debug("Peer supports DHT, sending PORT message");
int port = util.getDHT().getPort();
out.sendPort(port);
}
// Send our bitmap
if (bitfield != null) s.out.sendBitfield(bitfield);
// We are up and running!
state = s;
magnetState = mState;
listener.connected(this);
if (_log.shouldLog(Log.DEBUG)) _log.debug("Start running the reader with " + toString());
// Use this thread for running the incomming connection.
// The outgoing connection creates its own Thread.
out.startup();
Thread.currentThread().setName("Snark reader from " + peerID);
s.in.run();
} catch (IOException eofe) {
// Ignore, probably just the other side closing the connection.
// Or refusing the connection, timing out, etc.
if (_log.shouldLog(Log.DEBUG)) _log.debug(this.toString(), eofe);
} catch (Throwable t) {
_log.error(this + ": " + t.getMessage(), t);
if (t instanceof OutOfMemoryError) throw (OutOfMemoryError) t;
} finally {
if (deregister) listener.disconnected(this);
disconnect();
}
}
/**
* multitorrent
*
* @param baseFile if null, use rootDir/torrentName; if non-null, use it instead
* @throws RuntimeException via fatal()
* @since 0.9.11
*/
public Snark(
I2PSnarkUtil util,
String torrent,
String ip,
int user_port,
StorageListener slistener,
CoordinatorListener clistener,
CompleteListener complistener,
PeerCoordinatorSet peerCoordinatorSet,
ConnectionAcceptor connectionAcceptor,
boolean start,
String rootDir,
File baseFile) {
if (slistener == null) slistener = this;
completeListener = complistener;
_util = util;
_log = util.getContext().logManager().getLog(Snark.class);
_peerCoordinatorSet = peerCoordinatorSet;
acceptor = connectionAcceptor;
this.torrent = torrent;
this.rootDataDir = new File(rootDir);
stopped = true;
activity = "Network setup";
id = generateID();
if (_log.shouldLog(Log.INFO)) _log.info("My peer id: " + PeerID.idencode(id));
/*
* Don't start a tunnel if the torrent isn't going to be started.
* If we are starting,
* startTorrent() will force a connect.
*
boolean ok = util.connect();
if (!ok) fatal("Unable to connect to I2P");
I2PServerSocket serversocket = util.getServerSocket();
if (serversocket == null)
fatal("Unable to listen for I2P connections");
else {
Destination d = serversocket.getManager().getSession().getMyDestination();
debug("Listening on I2P destination " + d.toBase64() + " / " + d.calculateHash().toBase64(), NOTICE);
}
*/
// Figure out what the torrent argument represents.
File f = null;
InputStream in = null;
byte[] x_infoHash = null;
try {
f = new File(torrent);
if (f.exists()) in = new FileInputStream(f);
else {
/**
* ** No, we don't ever fetch a torrent file this way and we don't want to block in the
* constructor activity = "Getting torrent"; File torrentFile = _util.get(torrent, 3); if
* (torrentFile == null) { fatal("Unable to fetch " + torrent); if (false) return; // never
* reached - fatal(..) throws } else { torrentFile.deleteOnExit(); in = new
* FileInputStream(torrentFile); } ***
*/
throw new IOException("not found");
}
meta = new MetaInfo(in);
x_infoHash = meta.getInfoHash();
} catch (IOException ioe) {
// OK, so it wasn't a torrent metainfo file.
if (f != null && f.exists())
if (ip == null)
fatal(
"'"
+ torrent
+ "' exists,"
+ " but is not a valid torrent metainfo file."
+ System.getProperty("line.separator"),
ioe);
else fatal("I2PSnark does not support creating and tracking a torrent at the moment");
/*
{
// Try to create a new metainfo file
debug
("Trying to create metainfo torrent for '" + torrent + "'",
NOTICE);
try
{
activity = "Creating torrent";
storage = new Storage
(f, "http://" + ip + ":" + port + "/announce", slistener);
storage.create();
meta = storage.getMetaInfo();
}
catch (IOException ioe2)
{
fatal("Could not create torrent for '" + torrent + "'", ioe2);
}
}
*/
else fatal("Cannot open '" + torrent + "'", ioe);
} catch (OutOfMemoryError oom) {
fatal("ERROR - Out of memory, cannot create torrent " + torrent + ": " + oom.getMessage());
} finally {
if (in != null)
try {
in.close();
} catch (IOException ioe) {
}
}
infoHash = x_infoHash; // final
if (_log.shouldLog(Log.INFO)) _log.info(meta.toString());
// When the metainfo torrent was created from an existing file/dir
// it already exists.
if (storage == null) {
try {
activity = "Checking storage";
boolean shouldPreserve =
completeListener != null && completeListener.getSavedPreserveNamesSetting(this);
if (baseFile == null) {
String base = meta.getName();
if (!shouldPreserve) base = Storage.filterName(base);
if (_util.getFilesPublic()) baseFile = new File(rootDataDir, base);
else baseFile = new SecureFile(rootDataDir, base);
}
storage = new Storage(_util, baseFile, meta, slistener, shouldPreserve);
if (completeListener != null) {
storage.check(
completeListener.getSavedTorrentTime(this),
completeListener.getSavedTorrentBitField(this));
} else {
storage.check();
}
// have to figure out when to reopen
// if (!start)
// storage.close();
} catch (IOException ioe) {
try {
storage.close();
} catch (IOException ioee) {
ioee.printStackTrace();
}
fatal("Could not check or create storage", ioe);
}
}
/*
* see comment above
*
activity = "Collecting pieces";
coordinator = new PeerCoordinator(id, meta, storage, clistener, this);
PeerCoordinatorSet set = PeerCoordinatorSet.instance();
set.add(coordinator);
ConnectionAcceptor acceptor = ConnectionAcceptor.instance();
acceptor.startAccepting(set, serversocket);
trackerclient = new TrackerClient(meta, coordinator);
*/
savedUploaded = (completeListener != null) ? completeListener.getSavedUploaded(this) : 0;
if (start) startTorrent();
}
