Merge branch 'trz/rebase' into trz/rename

Conflicts:
	build.gradle
	src/main/java/de/thedevstack/conversationsplus/crypto/OtrEngine.java
	src/main/java/de/thedevstack/conversationsplus/entities/Account.java
	src/main/java/de/thedevstack/conversationsplus/entities/Contact.java
	src/main/java/de/thedevstack/conversationsplus/entities/Downloadable.java
	src/main/java/de/thedevstack/conversationsplus/entities/DownloadableFile.java
	src/main/java/de/thedevstack/conversationsplus/entities/DownloadablePlaceholder.java
	src/main/java/de/thedevstack/conversationsplus/entities/Message.java
	src/main/java/de/thedevstack/conversationsplus/generator/IqGenerator.java
	src/main/java/de/thedevstack/conversationsplus/http/HttpConnection.java
	src/main/java/de/thedevstack/conversationsplus/http/HttpConnectionManager.java
	src/main/java/de/thedevstack/conversationsplus/parser/AbstractParser.java
	src/main/java/de/thedevstack/conversationsplus/parser/MessageParser.java
	src/main/java/de/thedevstack/conversationsplus/parser/PresenceParser.java
	src/main/java/de/thedevstack/conversationsplus/persistance/DatabaseBackend.java
	src/main/java/de/thedevstack/conversationsplus/persistance/FileBackend.java
	src/main/java/de/thedevstack/conversationsplus/services/NotificationService.java
	src/main/java/de/thedevstack/conversationsplus/services/XmppConnectionService.java
	src/main/java/de/thedevstack/conversationsplus/ui/ConversationActivity.java
	src/main/java/de/thedevstack/conversationsplus/ui/ConversationFragment.java
	src/main/java/de/thedevstack/conversationsplus/ui/SettingsActivity.java
	src/main/java/de/thedevstack/conversationsplus/ui/StartConversationActivity.java
	src/main/java/de/thedevstack/conversationsplus/ui/adapter/AccountAdapter.java
	src/main/java/de/thedevstack/conversationsplus/ui/adapter/ConversationAdapter.java
	src/main/java/de/thedevstack/conversationsplus/ui/adapter/ListItemAdapter.java
	src/main/java/de/thedevstack/conversationsplus/ui/adapter/MessageAdapter.java
	src/main/java/de/thedevstack/conversationsplus/utils/UIHelper.java
	src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java
	src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java
	src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java
	src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java
	src/main/java/de/thedevstack/conversationsplus/xmpp/stanzas/MessagePacket.java
	src/main/java/eu/siacs/conversations/crypto/OtrEngine.java
	src/main/java/eu/siacs/conversations/crypto/OtrService.java
	src/main/java/eu/siacs/conversations/entities/DownloadablePlaceholder.java
	src/main/java/eu/siacs/conversations/entities/TransferablePlaceholder.java
	src/main/java/eu/siacs/conversations/http/HttpConnection.java
	src/main/java/eu/siacs/conversations/http/HttpDownloadConnection.java
	src/main/res/layout/activity_about.xml

4 files changed, 111 insertions, 87 deletions

diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java
index 6348ec7e..7b7aefee 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnection.java
@@ -1,6 +1,5 @@
 package de.thedevstack.conversationsplus.xmpp.jingle;
 
-import java.net.URLConnection;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
@@ -16,9 +15,9 @@ import android.util.Log;
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.Conversation;
-import de.thedevstack.conversationsplus.entities.Downloadable;
+import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
-import de.thedevstack.conversationsplus.entities.DownloadablePlaceholder;
+import de.thedevstack.conversationsplus.entities.TransferablePlaceholder;
 import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
 import de.thedevstack.conversationsplus.xml.Element;
@@ -29,7 +28,7 @@ import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.JinglePacket;
 import de.thedevstack.conversationsplus.xmpp.jingle.stanzas.Reason;
 import de.thedevstack.conversationsplus.xmpp.stanzas.IqPacket;
 
-public class JingleConnection implements Downloadable {
+public class JingleConnection implements Transferable {
 
 	private JingleConnectionManager mJingleConnectionManager;
 	private XmppConnectionService mXmppConnectionService;
@@ -40,10 +39,10 @@ public class JingleConnection implements Downloadable {
 	protected static final int JINGLE_STATUS_TRANSMITTING = 5;
 	protected static final int JINGLE_STATUS_FAILED = 99;
 
-	private int ibbBlockSize = 4096;
+	private int ibbBlockSize = 8192;
 
 	private int mJingleStatus = -1;
-	private int mStatus = Downloadable.STATUS_UNKNOWN;
+	private int mStatus = Transferable.STATUS_UNKNOWN;
 	private Message message;
 	private String sessionId;
 	private Account account;
@@ -99,7 +98,7 @@ public class JingleConnection implements Downloadable {
 					file.delete();
 				}
 			}
-			Log.d(Config.LOGTAG,"sucessfully transmitted file:" + file.getAbsolutePath());
+			Log.d(Config.LOGTAG,"successfully transmitted file:" + file.getAbsolutePath()+" ("+file.getSha1Sum()+")");
 			if (message.getEncryption() != Message.ENCRYPTION_PGP) {
 				Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 				intent.setData(Uri.fromFile(file));
@@ -192,15 +191,15 @@ public class JingleConnection implements Downloadable {
 		} else {
 			response = packet.generateResponse(IqPacket.TYPE.ERROR);
 		}
-		account.getXmppConnection().sendIqPacket(response, null);
+		mXmppConnectionService.sendIqPacket(account,response,null);
 	}
 
 	public void init(Message message) {
 		this.contentCreator = "initiator";
 		this.contentName = this.mJingleConnectionManager.nextRandomId();
 		this.message = message;
-		this.message.setDownloadable(this);
-		this.mStatus = Downloadable.STATUS_UPLOADING;
+		this.message.setTransferable(this);
+		this.mStatus = Transferable.STATUS_UPLOADING;
 		this.account = message.getConversation().getAccount();
 		this.initiator = this.account.getJid();
 		this.responder = this.message.getCounterpart();
@@ -213,7 +212,7 @@ public class JingleConnection implements Downloadable {
 
 						@Override
 						public void onPrimaryCandidateFound(boolean success,
-								final JingleCandidate candidate) {
+															final JingleCandidate candidate) {
 							if (success) {
 								final JingleSocks5Transport socksConnection = new JingleSocks5Transport(
 										JingleConnection.this, candidate);
@@ -256,8 +255,8 @@ public class JingleConnection implements Downloadable {
 						packet.getFrom().toBareJid(), false);
 		this.message = new Message(conversation, "", Message.ENCRYPTION_NONE);
 		this.message.setStatus(Message.STATUS_RECEIVED);
-		this.mStatus = Downloadable.STATUS_OFFER;
-		this.message.setDownloadable(this);
+		this.mStatus = Transferable.STATUS_OFFER;
+		this.message.setTransferable(this);
         final Jid from = packet.getFrom();
 		this.message.setCounterpart(from);
 		this.account = account;
@@ -271,6 +270,9 @@ public class JingleConnection implements Downloadable {
 		this.mergeCandidates(JingleCandidate.parse(content.socks5transport()
 				.getChildren()));
 		this.fileOffer = packet.getJingleContent().getFileOffer();
+
+		mXmppConnectionService.sendIqPacket(account,packet.generateResponse(IqPacket.TYPE.RESULT),null);
+
 		if (fileOffer != null) {
 			Element fileSize = fileOffer.findChild("size");
 			Element fileNameElement = fileOffer.findChild("name");
@@ -366,7 +368,10 @@ public class JingleConnection implements Downloadable {
 					message, false);
 			if (message.getEncryption() == Message.ENCRYPTION_OTR) {
 				Conversation conversation = this.message.getConversation();
-				this.mXmppConnectionService.renewSymmetricKey(conversation);
+				if (!this.mXmppConnectionService.renewSymmetricKey(conversation)) {
+					Log.d(Config.LOGTAG,account.getJid().toBareJid()+": could not set symmetric key");
+					cancel();
+				}
 				content.setFileOffer(this.file, true);
 				this.file.setKey(conversation.getSymmetricKey());
 			} else {
@@ -381,6 +386,7 @@ public class JingleConnection implements Downloadable {
 				@Override
 				public void onIqPacketReceived(Account account, IqPacket packet) {
 					if (packet.getType() != IqPacket.TYPE.ERROR) {
+						Log.d(Config.LOGTAG,account.getJid().toBareJid()+": other party received offer");
 						mJingleStatus = JINGLE_STATUS_INITIATED;
 						mXmppConnectionService.markMessage(message, Message.STATUS_OFFERED);
 					} else {
@@ -395,14 +401,16 @@ public class JingleConnection implements Downloadable {
 	private List<Element> getCandidatesAsElements() {
 		List<Element> elements = new ArrayList<>();
 		for (JingleCandidate c : this.candidates) {
-			elements.add(c.toElement());
+			if (c.isOurs()) {
+				elements.add(c.toElement());
+			}
 		}
 		return elements;
 	}
 
 	private void sendAccept() {
 		mJingleStatus = JINGLE_STATUS_ACCEPTED;
-		this.mStatus = Downloadable.STATUS_DOWNLOADING;
+		this.mStatus = Transferable.STATUS_DOWNLOADING;
 		mXmppConnectionService.updateConversationUi();
 		this.mJingleConnectionManager.getPrimaryCandidate(this.account, new OnPrimaryCandidateFound() {
 			@Override
@@ -459,11 +467,11 @@ public class JingleConnection implements Downloadable {
 	}
 
 	private void sendJinglePacket(JinglePacket packet) {
-		account.getXmppConnection().sendIqPacket(packet, responseListener);
+		mXmppConnectionService.sendIqPacket(account,packet,responseListener);
 	}
 
 	private void sendJinglePacket(JinglePacket packet, OnIqPacketReceived callback) {
-		account.getXmppConnection().sendIqPacket(packet,callback);
+		mXmppConnectionService.sendIqPacket(account,packet,callback);
 	}
 
 	private boolean receiveAccept(JinglePacket packet) {
@@ -556,7 +564,7 @@ public class JingleConnection implements Downloadable {
 							.setAttribute("sid", this.getSessionId());
 					activation.query().addChild("activate")
 							.setContent(this.getCounterPart().toString());
-					this.account.getXmppConnection().sendIqPacket(activation,
+					mXmppConnectionService.sendIqPacket(account,activation,
 							new OnIqPacketReceived() {
 
 								@Override
@@ -633,7 +641,7 @@ public class JingleConnection implements Downloadable {
 		this.disconnectSocks5Connections();
 		this.mJingleStatus = JINGLE_STATUS_FINISHED;
 		this.message.setStatus(Message.STATUS_RECEIVED);
-		this.message.setDownloadable(null);
+		this.message.setTransferable(null);
 		this.mXmppConnectionService.updateMessage(message);
 		this.mJingleConnectionManager.finishConnection(this);
 	}
@@ -710,7 +718,7 @@ public class JingleConnection implements Downloadable {
 		if (this.transport != null && this.transport instanceof JingleInbandTransport) {
 			this.transport.disconnect();
 		}
-		this.message.setDownloadable(null);
+		this.message.setTransferable(null);
 		this.mJingleConnectionManager.finishConnection(this);
 	}
 
@@ -722,7 +730,7 @@ public class JingleConnection implements Downloadable {
 		this.sendCancel();
 		this.mJingleConnectionManager.finishConnection(this);
 		if (this.responder.equals(account.getJid())) {
-			this.message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_FAILED));
+			this.message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_FAILED));
 			if (this.file!=null) {
 				file.delete();
 			}
@@ -730,7 +738,7 @@ public class JingleConnection implements Downloadable {
 		} else {
 			this.mXmppConnectionService.markMessage(this.message,
 					Message.STATUS_SEND_FAILED);
-			this.message.setDownloadable(null);
+			this.message.setTransferable(null);
 		}
 	}
 
@@ -742,7 +750,7 @@ public class JingleConnection implements Downloadable {
 		}
 		if (this.message != null) {
 			if (this.responder.equals(account.getJid())) {
-				this.message.setDownloadable(new DownloadablePlaceholder(Downloadable.STATUS_FAILED));
+				this.message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_FAILED));
 				if (this.file!=null) {
 					file.delete();
 				}
@@ -750,7 +758,7 @@ public class JingleConnection implements Downloadable {
 			} else {
 				this.mXmppConnectionService.markMessage(this.message,
 						Message.STATUS_SEND_FAILED);
-				this.message.setDownloadable(null);
+				this.message.setTransferable(null);
 			}
 		}
 		this.mJingleConnectionManager.finishConnection(this);
@@ -948,24 +956,4 @@ public class JingleConnection implements Downloadable {
 	public int getProgress() {
 		return this.mProgress;
 	}
-
-	@Override
-	public String getMimeType() {
-		if (this.message.getType() == Message.TYPE_FILE) {
-			String mime = null;
-			String path = this.message.getRelativeFilePath();
-			if (path != null && !this.message.getRelativeFilePath().isEmpty()) {
-				mime = URLConnection.guessContentTypeFromName(this.message.getRelativeFilePath());
-				if (mime!=null) {
-					return  mime;
-				} else {
-					return "";
-				}
-			} else {
-				return "";
-			}
-		} else {
-			return "image/webp";
-		}
-	}
 }
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java
index eb1bfe2e..8c2a9216 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleConnectionManager.java
@@ -9,6 +9,7 @@ import android.annotation.SuppressLint;
 import android.util.Log;
 import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.entities.Account;
+import de.thedevstack.conversationsplus.entities.Transferable;
 import de.thedevstack.conversationsplus.entities.Message;
 import de.thedevstack.conversationsplus.services.AbstractConnectionManager;
 import de.thedevstack.conversationsplus.services.XmppConnectionService;
@@ -58,7 +59,12 @@ public class JingleConnectionManager extends AbstractConnectionManager {
 	}
 
 	public JingleConnection createNewConnection(Message message) {
+		Transferable old = message.getTransferable();
+		if (old != null) {
+			old.cancel();
+		}
 		JingleConnection connection = new JingleConnection(this);
+		mXmppConnectionService.markMessage(message,Message.STATUS_WAITING);
 		connection.init(message);
 		this.connections.add(connection);
 		return connection;
@@ -81,10 +87,10 @@ public class JingleConnectionManager extends AbstractConnectionManager {
 			return;
 		}
 		if (!this.primaryCandidates.containsKey(account.getJid().toBareJid())) {
-			final String proxy = account.getXmppConnection().findDiscoItemByFeature(Xmlns.BYTE_STREAMS);
+			final Jid proxy = account.getXmppConnection().findDiscoItemByFeature(Xmlns.BYTE_STREAMS);
 			if (proxy != null) {
 				IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
-				iq.setAttribute("to", proxy);
+				iq.setTo(proxy);
 				iq.query(Xmlns.BYTE_STREAMS);
 				account.getXmppConnection().sendIqPacket(iq,new OnIqPacketReceived() {
 
@@ -99,11 +105,11 @@ public class JingleConnectionManager extends AbstractConnectionManager {
 								candidate.setHost(host);
 								candidate.setPort(Integer.parseInt(port));
 								candidate.setType(JingleCandidate.TYPE_PROXY);
-								candidate.setJid(Jid.fromString(proxy));
+								candidate.setJid(proxy);
 								candidate.setPriority(655360 + 65535);
 								primaryCandidates.put(account.getJid().toBareJid(),candidate);
 								listener.onPrimaryCandidateFound(true,candidate);
-							} catch (final NumberFormatException | InvalidJidException e) {
+							} catch (final NumberFormatException e) {
 								listener.onPrimaryCandidateFound(false,null);
 								return;
 							}
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java
index 7336eff7..08b63d5b 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleInbandTransport.java
@@ -8,9 +8,12 @@ import java.security.NoSuchAlgorithmException;
 import java.util.Arrays;
 
 import android.util.Base64;
+import android.util.Log;
 
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.entities.Account;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
+import de.thedevstack.conversationsplus.persistance.FileBackend;
 import de.thedevstack.conversationsplus.utils.CryptoHelper;
 import de.thedevstack.conversationsplus.xml.Element;
 import de.thedevstack.conversationsplus.xmpp.OnIqPacketReceived;
@@ -22,7 +25,6 @@ public class JingleInbandTransport extends JingleTransport {
 	private Account account;
 	private Jid counterpart;
 	private int blockSize;
-	private int bufferSize;
 	private int seq = 0;
 	private String sessionId;
 
@@ -55,7 +57,6 @@ public class JingleInbandTransport extends JingleTransport {
 		this.account = connection.getAccount();
 		this.counterpart = connection.getCounterPart();
 		this.blockSize = blocksize;
-		this.bufferSize = blocksize / 4;
 		this.sessionId = sid;
 	}
 
@@ -94,11 +95,13 @@ public class JingleInbandTransport extends JingleTransport {
 			file.createNewFile();
 			this.fileOutputStream = file.createOutputStream();
 			if (this.fileOutputStream == null) {
+				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": could not create output stream");
 				callback.onFileTransferAborted();
 				return;
 			}
 			this.remainingSize = this.fileSize = file.getExpectedSize();
 		} catch (final NoSuchAlgorithmException | IOException e) {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+" "+e.getMessage());
 			callback.onFileTransferAborted();
 		}
     }
@@ -109,12 +112,17 @@ public class JingleInbandTransport extends JingleTransport {
 		this.onFileTransmissionStatusChanged = callback;
 		this.file = file;
 		try {
-			this.remainingSize = this.file.getSize();
+			if (this.file.getKey() != null) {
+				this.remainingSize = (this.file.getSize() / 16 + 1) * 16;
+			} else {
+				this.remainingSize = this.file.getSize();
+			}
 			this.fileSize = this.remainingSize;
 			this.digest = MessageDigest.getInstance("SHA-1");
 			this.digest.reset();
 			fileInputStream = this.file.createInputStream();
 			if (fileInputStream == null) {
+				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": could no create input stream");
 				callback.onFileTransferAborted();
 				return;
 			}
@@ -123,6 +131,7 @@ public class JingleInbandTransport extends JingleTransport {
 			}
 		} catch (NoSuchAlgorithmException e) {
 			callback.onFileTransferAborted();
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": "+e.getMessage());
 		}
 	}
 
@@ -146,32 +155,42 @@ public class JingleInbandTransport extends JingleTransport {
 	}
 
 	private void sendNextBlock() {
-		byte[] buffer = new byte[this.bufferSize];
+		byte[] buffer = new byte[this.blockSize];
 		try {
 			int count = fileInputStream.read(buffer);
 			if (count == -1) {
 				file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
-				fileInputStream.close();
 				this.onFileTransmissionStatusChanged.onFileTransmitted(file);
-			} else {
-				this.remainingSize -= count;
-				this.digest.update(buffer);
-				String base64 = Base64.encodeToString(buffer, Base64.NO_WRAP);
-				IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
-				iq.setTo(this.counterpart);
-				Element data = iq.addChild("data",
-						"http://jabber.org/protocol/ibb");
-				data.setAttribute("seq", Integer.toString(this.seq));
-				data.setAttribute("block-size",
-						Integer.toString(this.blockSize));
-				data.setAttribute("sid", this.sessionId);
-				data.setContent(base64);
-				this.account.getXmppConnection().sendIqPacket(iq,
-						this.onAckReceived);
-				this.seq++;
+				fileInputStream.close();
+				return;
+			} else if (count != buffer.length) {
+				int rem = fileInputStream.read(buffer,count,buffer.length-count);
+				if (rem > 0) {
+					count += rem;
+				}
+			}
+			this.remainingSize -= count;
+			this.digest.update(buffer,0,count);
+			String base64 = Base64.encodeToString(buffer,0,count, Base64.NO_WRAP);
+			IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
+			iq.setTo(this.counterpart);
+			Element data = iq.addChild("data", "http://jabber.org/protocol/ibb");
+			data.setAttribute("seq", Integer.toString(this.seq));
+			data.setAttribute("block-size", Integer.toString(this.blockSize));
+			data.setAttribute("sid", this.sessionId);
+			data.setContent(base64);
+			this.account.getXmppConnection().sendIqPacket(iq, this.onAckReceived);
+			this.seq++;
+			if (this.remainingSize > 0) {
 				connection.updateProgress((int) ((((double) (this.fileSize - this.remainingSize)) / this.fileSize) * 100));
+			} else {
+				file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
+				this.onFileTransmissionStatusChanged.onFileTransmitted(file);
+				fileInputStream.close();
 			}
 		} catch (IOException e) {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": "+e.getMessage());
+			FileBackend.close(fileInputStream);
 			this.onFileTransmissionStatusChanged.onFileTransferAborted();
 		}
 	}
@@ -180,14 +199,10 @@ public class JingleInbandTransport extends JingleTransport {
 		try {
 			byte[] buffer = Base64.decode(data, Base64.NO_WRAP);
 			if (this.remainingSize < buffer.length) {
-				buffer = Arrays
-						.copyOfRange(buffer, 0, (int) this.remainingSize);
+				buffer = Arrays.copyOfRange(buffer, 0, (int) this.remainingSize);
 			}
 			this.remainingSize -= buffer.length;
-
-
 			this.fileOutputStream.write(buffer);
-
 			this.digest.update(buffer);
 			if (this.remainingSize <= 0) {
 				file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
@@ -198,6 +213,8 @@ public class JingleInbandTransport extends JingleTransport {
 				connection.updateProgress((int) ((((double) (this.fileSize - this.remainingSize)) / this.fileSize) * 100));
 			}
 		} catch (IOException e) {
+			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": "+e.getMessage());
+			FileBackend.close(fileOutputStream);
 			this.onFileTransmissionStatusChanged.onFileTransferAborted();
 		}
 	}
@@ -207,6 +224,7 @@ public class JingleInbandTransport extends JingleTransport {
 			if (!established) {
 				established = true;
 				connected = true;
+				this.receiveNextBlock("");
 				this.account.getXmppConnection().sendIqPacket(
 						packet.generateResponse(IqPacket.TYPE.RESULT), null);
 			} else {
diff --git a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java
index a1094dd7..2e2ba4fe 100644
--- a/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java
+++ b/src/main/java/de/thedevstack/conversationsplus/xmpp/jingle/JingleSocks5Transport.java
@@ -1,16 +1,22 @@
 package de.thedevstack.conversationsplus.xmpp.jingle;
 
+import android.util.Log;
+
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.net.InetSocketAddress;
 import java.net.Socket;
+import java.net.SocketAddress;
 import java.net.UnknownHostException;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.Arrays;
 
+import de.thedevstack.conversationsplus.Config;
 import de.thedevstack.conversationsplus.entities.DownloadableFile;
+import de.thedevstack.conversationsplus.persistance.FileBackend;
 import de.thedevstack.conversationsplus.utils.CryptoHelper;
 
 public class JingleSocks5Transport extends JingleTransport {
@@ -52,8 +58,9 @@ public class JingleSocks5Transport extends JingleTransport {
 			@Override
 			public void run() {
 				try {
-					socket = new Socket(candidate.getHost(),
-							candidate.getPort());
+					socket = new Socket();
+					SocketAddress address = new InetSocketAddress(candidate.getHost(),candidate.getPort());
+					socket.connect(address,Config.SOCKET_TIMEOUT * 1000);
 					inputStream = socket.getInputStream();
 					outputStream = socket.getOutputStream();
 					byte[] login = { 0x05, 0x01, 0x00 };
@@ -101,6 +108,7 @@ public class JingleSocks5Transport extends JingleTransport {
 					digest.reset();
 					fileInputStream = file.createInputStream();
 					if (fileInputStream == null) {
+						Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": could not create input stream");
 						callback.onFileTransferAborted();
 						return;
 					}
@@ -120,31 +128,28 @@ public class JingleSocks5Transport extends JingleTransport {
 						callback.onFileTransmitted(file);
 					}
 				} catch (FileNotFoundException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
 				} catch (IOException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
 				} catch (NoSuchAlgorithmException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
 				} finally {
-					try {
-						if (fileInputStream != null) {
-							fileInputStream.close();
-						}
-					} catch (IOException e) {
-						callback.onFileTransferAborted();
-					}
+					FileBackend.close(fileInputStream);
 				}
 			}
 		}).start();
 
 	}
 
-	public void receive(final DownloadableFile file,
-			final OnFileTransmissionStatusChanged callback) {
+	public void receive(final DownloadableFile file, final OnFileTransmissionStatusChanged callback) {
 		new Thread(new Runnable() {
 
 			@Override
 			public void run() {
+				OutputStream fileOutputStream = null;
 				try {
 					MessageDigest digest = MessageDigest.getInstance("SHA-1");
 					digest.reset();
@@ -152,9 +157,10 @@ public class JingleSocks5Transport extends JingleTransport {
 					socket.setSoTimeout(30000);
 					file.getParentFile().mkdirs();
 					file.createNewFile();
-					OutputStream fileOutputStream = file.createOutputStream();
+					fileOutputStream = file.createOutputStream();
 					if (fileOutputStream == null) {
 						callback.onFileTransferAborted();
+						Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": could not create output stream");
 						return;
 					}
 					double size = file.getExpectedSize();
@@ -165,6 +171,7 @@ public class JingleSocks5Transport extends JingleTransport {
 						count = inputStream.read(buffer);
 						if (count == -1) {
 							callback.onFileTransferAborted();
+							Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": file ended prematurely with "+remainingSize+" bytes remaining");
 							return;
 						} else {
 							fileOutputStream.write(buffer, 0, count);
@@ -178,11 +185,16 @@ public class JingleSocks5Transport extends JingleTransport {
 					file.setSha1Sum(CryptoHelper.bytesToHex(digest.digest()));
 					callback.onFileTransmitted(file);
 				} catch (FileNotFoundException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
 				} catch (IOException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
 				} catch (NoSuchAlgorithmException e) {
+					Log.d(Config.LOGTAG, connection.getAccount().getJid().toBareJid() + ": "+e.getMessage());
 					callback.onFileTransferAborted();
+				} finally {
+					FileBackend.close(fileOutputStream);
 				}
 			}
 		}).start();