/**
* 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();
}
}
