mark cancelled jingle ft as such on both sides

7 files changed, 114 insertions, 84 deletions

diff --git a/src/main/java/de/pixart/messenger/entities/Transferable.java b/src/main/java/de/pixart/messenger/entities/Transferable.java
index 054841b6e..968563b32 100644
--- a/src/main/java/de/pixart/messenger/entities/Transferable.java
+++ b/src/main/java/de/pixart/messenger/entities/Transferable.java
@@ -19,6 +19,7 @@ public interface Transferable {
             "otr"
     );
 
+    int STATUS_WAITING = 0x199;
     int STATUS_UNKNOWN = 0x200;
     int STATUS_CHECKING = 0x201;
     int STATUS_FAILED = 0x202;
@@ -26,7 +27,7 @@ public interface Transferable {
     int STATUS_DOWNLOADING = 0x204;
     int STATUS_OFFER_CHECK_FILESIZE = 0x206;
     int STATUS_UPLOADING = 0x207;
-    int STATUS_WAITING = 0x199;
+    int STATUS_CANCELLED = 0x208;
 
 
     boolean start();
diff --git a/src/main/java/de/pixart/messenger/ui/adapter/MessageAdapter.java b/src/main/java/de/pixart/messenger/ui/adapter/MessageAdapter.java
index 6cff1aebd..d11a2af0f 100644
--- a/src/main/java/de/pixart/messenger/ui/adapter/MessageAdapter.java
+++ b/src/main/java/de/pixart/messenger/ui/adapter/MessageAdapter.java
@@ -9,10 +9,6 @@ import android.graphics.Rect;
 import android.graphics.Typeface;
 import android.net.Uri;
 import android.preference.PreferenceManager;
-
-import androidx.core.app.ActivityCompat;
-import androidx.core.content.ContextCompat;
-
 import android.text.Editable;
 import android.text.Spannable;
 import android.text.SpannableString;
@@ -39,6 +35,9 @@ import android.widget.RelativeLayout;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+
 import com.google.common.base.Strings;
 import com.squareup.picasso.Picasso;
 
@@ -230,7 +229,7 @@ public class MessageAdapter extends ArrayAdapter<Message> implements CopyTextVie
         if (message.isFileOrImage() || transferable != null) {
             FileParams params = message.getFileParams();
             filesize = params.size > 0 ? UIHelper.filesizeToString(params.size) : null;
-            if (transferable != null && transferable.getStatus() == Transferable.STATUS_FAILED) {
+            if (transferable != null && (transferable.getStatus() == Transferable.STATUS_FAILED || transferable.getStatus() == Transferable.STATUS_CANCELLED)) {
                 error = true;
             }
         }
diff --git a/src/main/java/de/pixart/messenger/utils/UIHelper.java b/src/main/java/de/pixart/messenger/utils/UIHelper.java
index 102848183..e081ae6d6 100644
--- a/src/main/java/de/pixart/messenger/utils/UIHelper.java
+++ b/src/main/java/de/pixart/messenger/utils/UIHelper.java
@@ -1,12 +1,13 @@
 package de.pixart.messenger.utils;
 
 import android.content.Context;
-import androidx.annotation.ColorInt;
 import android.text.SpannableStringBuilder;
 import android.text.format.DateFormat;
 import android.text.format.DateUtils;
 import android.util.Pair;
 
+import androidx.annotation.ColorInt;
+
 import java.math.BigInteger;
 import java.security.MessageDigest;
 import java.util.Arrays;
@@ -269,6 +270,8 @@ public class UIHelper {
                             getFileDescriptionString(context, message)), true);
                 case Transferable.STATUS_FAILED:
                     return new Pair<>(context.getString(R.string.file_transmission_failed), true);
+                case Transferable.STATUS_CANCELLED:
+                    return new Pair<>(context.getString(R.string.file_transmission_cancelled), true);
                 case Transferable.STATUS_UPLOADING:
                     if (message.getStatus() == Message.STATUS_OFFERED) {
                         return new Pair<>(context.getString(R.string.offering_x_file,
@@ -315,12 +318,12 @@ public class UIHelper {
                             continue;
                         }
                         char first = l.charAt(0);
-                        if ((first != '>' || !isPositionFollowedByQuoteableCharacter(l,0)) && first != '\u00bb') {
+                        if ((first != '>' || !isPositionFollowedByQuoteableCharacter(l, 0)) && first != '\u00bb') {
                             CharSequence line = CharSequenceUtils.trim(l);
                             if (line.length() == 0) {
                                 continue;
                             }
-                            char last = line.charAt(line.length()-1);
+                            char last = line.charAt(line.length() - 1);
                             if (builder.length() != 0) {
                                 builder.append(' ');
                             }
diff --git a/src/main/java/de/pixart/messenger/xmpp/jingle/JingleConnection.java b/src/main/java/de/pixart/messenger/xmpp/jingle/JingleConnection.java
index 561404186..bfaeacc31 100644
--- a/src/main/java/de/pixart/messenger/xmpp/jingle/JingleConnection.java
+++ b/src/main/java/de/pixart/messenger/xmpp/jingle/JingleConnection.java
@@ -12,6 +12,7 @@ import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.Date;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Locale;
@@ -143,7 +144,7 @@ public class JingleConnection implements Transferable {
 
         @Override
         public void onFileTransferAborted() {
-            JingleConnection.this.sendCancel();
+            JingleConnection.this.sendSessionTerminate("connectivity-error");
             JingleConnection.this.fail();
         }
     };
@@ -223,27 +224,27 @@ public class JingleConnection implements Transferable {
         return this.message.getCounterpart();
     }
 
-    public void deliverPacket(JinglePacket packet) {
-        boolean returnResult = true;
+    void deliverPacket(JinglePacket packet) {
         if (packet.isAction("session-terminate")) {
             Reason reason = packet.getReason();
             if (reason != null) {
                 if (reason.hasChild("cancel")) {
+                    this.cancelled = true;
                     this.fail();
                 } else if (reason.hasChild("success")) {
                     this.receiveSuccess();
                 } else {
-                    this.fail();
+                    this.fail(reason.getName());
                 }
             } else {
                 this.fail();
             }
         } else if (packet.isAction("session-accept")) {
-            returnResult = receiveAccept(packet);
+            receiveAccept(packet);
         } else if (packet.isAction("session-info")) {
-            Element checksum = packet.getChecksum();
-            Element file = checksum == null ? null : checksum.findChild("file");
-            Element hash = file == null ? null : file.findChild("hash", "urn:xmpp:hashes:2");
+            final Element checksum = packet.getChecksum();
+            final Element file = checksum == null ? null : checksum.findChild("file");
+            final Element hash = file == null ? null : file.findChild("hash", "urn:xmpp:hashes:2");
             if (hash != null && "sha-1".equalsIgnoreCase(hash.getAttribute("algo"))) {
                 try {
                     this.expectedHash = Base64.decode(hash.getContent(), Base64.DEFAULT);
@@ -251,27 +252,28 @@ public class JingleConnection implements Transferable {
                     this.expectedHash = new byte[0];
                 }
             }
+            respondToIq(packet, true);
         } else if (packet.isAction("transport-info")) {
-            returnResult = receiveTransportInfo(packet);
+            receiveTransportInfo(packet);
         } else if (packet.isAction("transport-replace")) {
             if (packet.getJingleContent().hasIbbTransport()) {
-                returnResult = this.receiveFallbackToIbb(packet);
+                receiveFallbackToIbb(packet);
             } else {
-                returnResult = false;
-                Log.d(Config.LOGTAG, "trying to fallback to something unknown"
-                        + packet.toString());
+                Log.d(Config.LOGTAG, "trying to fallback to something unknown" + packet.toString());
+                respondToIq(packet, false);
             }
         } else if (packet.isAction("transport-accept")) {
-            returnResult = this.receiveTransportAccept(packet);
+            receiveTransportAccept(packet);
         } else {
-            Log.d(Config.LOGTAG, "packet arrived in connection. action was "
-                    + packet.getAction());
-            returnResult = false;
+            Log.d(Config.LOGTAG, "packet arrived in connection. action was " + packet.getAction());
+            respondToIq(packet, false);
         }
-        IqPacket response;
-        if (returnResult) {
-            response = packet.generateResponse(IqPacket.TYPE.RESULT);
+    }
 
+    private void respondToIq(final IqPacket packet, final boolean result) {
+        final IqPacket response;
+        if (result) {
+            response = packet.generateResponse(IqPacket.TYPE.RESULT);
         } else {
             response = packet.generateResponse(IqPacket.TYPE.ERROR);
             final Element error = response.addChild("error").setAttribute("type", "cancel");
@@ -280,6 +282,14 @@ public class JingleConnection implements Transferable {
         mXmppConnectionService.sendIqPacket(account, response, null);
     }
 
+    private void respondToIqWithOutOfOrder(final IqPacket packet) {
+        final IqPacket response = packet.generateResponse(IqPacket.TYPE.ERROR);
+        final Element error = response.addChild("error").setAttribute("type", "wait");
+        error.addChild("unexpected-request", "urn:ietf:params:xml:ns:xmpp-stanzas");
+        error.addChild("out-of-order", "urn:xmpp:jingle:errors:1");
+        mXmppConnectionService.sendIqPacket(account, response, null);
+    }
+
     public void init(final Message message) {
         if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
             Conversation conversation = (Conversation) message.getConversation();
@@ -323,7 +333,7 @@ public class JingleConnection implements Transferable {
 
                         @Override
                         public void failed() {
-                            Log.d(Config.LOGTAG, "connection to our own proxy65 candidete failed");
+                            Log.d(Config.LOGTAG, String.format("connection to our own proxy65 candidate failed (%s:%d)", candidate.getHost(), candidate.getPort()));
                             sendInitRequest();
                         }
 
@@ -341,6 +351,7 @@ public class JingleConnection implements Transferable {
                 }
             });
         }
+
     }
 
     private void gatherAndConnectDirectCandidates() {
@@ -402,8 +413,6 @@ public class JingleConnection implements Transferable {
         this.contentName = content.getAttribute("name");
         this.transportId = content.getTransportId();
 
-        mXmppConnectionService.sendIqPacket(account, packet.generateResponse(IqPacket.TYPE.RESULT), null);
-
         if (this.initialTransport == Transport.SOCKS) {
             this.mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
         } else if (this.initialTransport == Transport.IBB) {
@@ -413,20 +422,20 @@ public class JingleConnection implements Transferable {
                     this.ibbBlockSize = Math.min(Integer.parseInt(receivedBlockSize), this.ibbBlockSize);
                 } catch (NumberFormatException e) {
                     Log.d(Config.LOGTAG, "number format exception " + e.getMessage());
-                    this.sendCancel();
+                    respondToIq(packet, false);
                     this.fail();
                     return;
                 }
             } else {
                 Log.d(Config.LOGTAG, "received block size was null");
-                this.sendCancel();
+                respondToIq(packet, false);
                 this.fail();
                 return;
             }
         }
         this.ftVersion = content.getVersion();
         if (ftVersion == null) {
-            this.sendCancel();
+            respondToIq(packet, false);
             this.fail();
             return;
         }
@@ -451,14 +460,26 @@ public class JingleConnection implements Transferable {
                 AbstractConnectionManager.Extension extension = AbstractConnectionManager.Extension.of(path);
                 if (VALID_IMAGE_EXTENSIONS.contains(extension.main)) {
                     message.setType(Message.TYPE_IMAGE);
-                    message.setRelativeFilePath(message.getUuid() + "." + extension.main);
+                    if (message.getStatus() == Message.STATUS_RECEIVED) {
+                        message.setRelativeFilePath(fileDateFormat.format(new Date(message.getTimeSent())) + "_" + message.getUuid().substring(0, 4) + "." + extension.main);
+                    } else {
+                        message.setRelativeFilePath("Sent/" + fileDateFormat.format(new Date(message.getTimeSent())) + "_" + message.getUuid().substring(0, 4) + "." + extension.main);
+                    }
                 } else if (VALID_CRYPTO_EXTENSIONS.contains(extension.main)) {
                     if (VALID_IMAGE_EXTENSIONS.contains(extension.secondary)) {
                         message.setType(Message.TYPE_IMAGE);
-                        message.setRelativeFilePath(message.getUuid() + "." + extension.secondary);
+                        if (message.getStatus() == Message.STATUS_RECEIVED) {
+                            message.setRelativeFilePath(fileDateFormat.format(new Date(message.getTimeSent())) + "_" + message.getUuid().substring(0, 4) + "." + extension.secondary);
+                        } else {
+                            message.setRelativeFilePath("Sent/" + fileDateFormat.format(new Date(message.getTimeSent())) + "_" + message.getUuid().substring(0, 4) + "." + extension.secondary);
+                        }
                     } else {
                         message.setType(Message.TYPE_FILE);
-                        message.setRelativeFilePath(message.getUuid() + (extension.secondary != null ? ("." + extension.secondary) : ""));
+                        if (message.getStatus() == Message.STATUS_RECEIVED) {
+                            message.setRelativeFilePath(fileDateFormat.format(new Date(message.getTimeSent())) + "_" + message.getUuid().substring(0, 4) + (extension.secondary != null ? ("." + extension.secondary) : ""));
+                        } else {
+                            message.setRelativeFilePath("Sent/" + fileDateFormat.format(new Date(message.getTimeSent())) + "_" + message.getUuid().substring(0, 4) + (extension.secondary != null ? ("." + extension.secondary) : ""));
+                        }
                     }
                     // only for OTR compatibility
                     if (extension.main.equals("otr")) {
@@ -468,7 +489,11 @@ public class JingleConnection implements Transferable {
                     }
                 } else {
                     message.setType(Message.TYPE_FILE);
-                    message.setRelativeFilePath(message.getUuid() + (extension.main != null ? ("." + extension.main) : ""));
+                    if (message.getStatus() == Message.STATUS_RECEIVED) {
+                        message.setRelativeFilePath(fileDateFormat.format(new Date(message.getTimeSent())) + "_" + message.getUuid().substring(0, 4) + (extension.main != null ? ("." + extension.main) : ""));
+                    } else {
+                        message.setRelativeFilePath("Sent/" + fileDateFormat.format(new Date(message.getTimeSent())) + "_" + message.getUuid().substring(0, 4) + (extension.main != null ? ("." + extension.main) : ""));
+                    }
                 }
                 long size = parseLong(fileSize, 0);
                 message.setBody(Long.toString(size));
@@ -491,6 +516,7 @@ public class JingleConnection implements Transferable {
                 //JET reports the plain text size. however lower levels of our receiving code still
                 //expect the cipher text size. so we just + 16 bytes (auth tag size) here
                 this.file.setExpectedSize(size + (remoteIsUsingJet ? 16 : 0));
+                respondToIq(packet, true);
                 if (mJingleConnectionManager.hasStoragePermission()
                         && size < this.mJingleConnectionManager.getAutoAcceptFileSize()
                         && mXmppConnectionService.isDataSaverDisabled()) {
@@ -508,13 +534,9 @@ public class JingleConnection implements Transferable {
                     this.mXmppConnectionService.getNotificationService().push(message);
                 }
                 Log.d(Config.LOGTAG, "receiving file: expecting size of " + this.file.getExpectedSize());
-            } else {
-                this.sendCancel();
-                this.fail();
+                return;
             }
-        } else {
-            this.sendCancel();
-            this.fail();
+            respondToIq(packet, false);
         }
     }
 
@@ -562,7 +584,7 @@ public class JingleConnection implements Transferable {
             try {
                 this.mFileInputStream = new FileInputStream(file);
             } catch (FileNotFoundException e) {
-                abort();
+                fail(e.getMessage());
                 return;
             }
             content.setTransportId(this.transportId);
@@ -642,7 +664,7 @@ public class JingleConnection implements Transferable {
 
                     @Override
                     public void established() {
-                        Log.d(Config.LOGTAG, "connected to proxy candidate");
+                        Log.d(Config.LOGTAG, "connected to proxy65 candidate");
                         mergeCandidate(candidate);
                         content.socks5transport().setChildren(getCandidatesAsElements());
                         packet.setContent(content);
@@ -690,18 +712,19 @@ public class JingleConnection implements Transferable {
         mXmppConnectionService.sendIqPacket(account, packet, callback);
     }
 
-    private boolean receiveAccept(JinglePacket packet) {
+    private void receiveAccept(JinglePacket packet) {
         if (this.mJingleStatus != JINGLE_STATUS_INITIATED) {
             Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received out of order session-accept");
-            return false;
+            respondToIqWithOutOfOrder(packet);
+            return;
         }
         this.mJingleStatus = JINGLE_STATUS_ACCEPTED;
         mXmppConnectionService.markMessage(message, Message.STATUS_UNSEND);
         Content content = packet.getJingleContent();
         if (content.hasSocks5Transport()) {
+            respondToIq(packet, true);
             mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
             this.connectNextCandidate();
-            return true;
         } else if (content.hasIbbTransport()) {
             String receivedBlockSize = packet.getJingleContent().ibbTransport().getAttribute("block-size");
             if (receivedBlockSize != null) {
@@ -714,18 +737,19 @@ public class JingleConnection implements Transferable {
                     Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to parse block size in session-accept");
                 }
             }
+            respondToIq(packet, true);
             this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
             this.transport.connect(onIbbTransportConnected);
-            return true;
         } else {
-            return false;
+            respondToIq(packet, false);
         }
     }
 
-    private boolean receiveTransportInfo(JinglePacket packet) {
-        Content content = packet.getJingleContent();
+    private void receiveTransportInfo(JinglePacket packet) {
+        final Content content = packet.getJingleContent();
         if (content.hasSocks5Transport()) {
             if (content.socks5transport().hasChild("activated")) {
+                respondToIq(packet, true);
                 if ((this.transport != null) && (this.transport instanceof JingleSocks5Transport)) {
                     onProxyActivated.success();
                 } else {
@@ -737,21 +761,20 @@ public class JingleConnection implements Transferable {
                         connection.setActivated(true);
                     } else {
                         Log.d(Config.LOGTAG, "activated connection not found");
-                        this.sendCancel();
+                        sendSessionTerminate("failed-transport");
                         this.fail();
                     }
                 }
-                return true;
             } else if (content.socks5transport().hasChild("proxy-error")) {
+                respondToIq(packet, true);
                 onProxyActivated.failed();
-                return true;
             } else if (content.socks5transport().hasChild("candidate-error")) {
                 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received candidate error");
+                respondToIq(packet, true);
                 this.receivedCandidate = true;
                 if (mJingleStatus == JINGLE_STATUS_ACCEPTED && this.sentCandidate) {
                     this.connect();
                 }
-                return true;
             } else if (content.socks5transport().hasChild("candidate-used")) {
                 String cid = content.socks5transport().findChild("candidate-used").getAttribute("cid");
                 if (cid != null) {
@@ -759,8 +782,10 @@ public class JingleConnection implements Transferable {
                     JingleCandidate candidate = getCandidate(cid);
                     if (candidate == null) {
                         Log.d(Config.LOGTAG, "could not find candidate with cid=" + cid);
-                        return false;
+                        respondToIq(packet, false);
+                        return;
                     }
+                    respondToIq(packet, true);
                     candidate.flagAsUsedByCounterpart();
                     this.receivedCandidate = true;
                     if (mJingleStatus == JINGLE_STATUS_ACCEPTED && this.sentCandidate) {
@@ -768,15 +793,14 @@ public class JingleConnection implements Transferable {
                     } else {
                         Log.d(Config.LOGTAG, "ignoring because file is already in transmission or we haven't sent our candidate yet status=" + mJingleStatus + " sentCandidate=" + sentCandidate);
                     }
-                    return true;
                 } else {
-                    return false;
+                    respondToIq(packet, false);
                 }
             } else {
-                return false;
+                respondToIq(packet, false);
             }
         } else {
-            return true;
+            respondToIq(packet, true);
         }
     }
 
@@ -875,11 +899,7 @@ public class JingleConnection implements Transferable {
     }
 
     private void sendSuccess() {
-        JinglePacket packet = bootstrapPacket("session-terminate");
-        Reason reason = new Reason();
-        reason.addChild("success");
-        packet.setReason(reason);
-        this.sendJinglePacket(packet);
+        sendSessionTerminate("success");
         this.disconnectSocks5Connections();
         this.mJingleStatus = JINGLE_STATUS_FINISHED;
         this.message.setStatus(Message.STATUS_RECEIVED);
@@ -901,7 +921,7 @@ public class JingleConnection implements Transferable {
     }
 
 
-    private boolean receiveFallbackToIbb(JinglePacket packet) {
+    private void receiveFallbackToIbb(JinglePacket packet) {
         Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": receiving fallback to ibb");
         final String receivedBlockSize = packet.getJingleContent().ibbTransport().getAttribute("block-size");
         if (receivedBlockSize != null) {
@@ -924,6 +944,7 @@ public class JingleConnection implements Transferable {
         content.ibbTransport().setAttribute("sid", this.transportId);
         answer.setContent(content);
 
+        respondToIq(packet, true);
 
         if (initiating()) {
             this.sendJinglePacket(answer, (account, response) -> {
@@ -936,10 +957,9 @@ public class JingleConnection implements Transferable {
             this.transport.receive(file, onFileTransmissionStatusChanged);
             this.sendJinglePacket(answer);
         }
-        return true;
     }
 
-    private boolean receiveTransportAccept(JinglePacket packet) {
+    private void receiveTransportAccept(JinglePacket packet) {
         if (packet.getJingleContent().hasIbbTransport()) {
             final Element ibbTransport = packet.getJingleContent().ibbTransport();
             final String receivedBlockSize = ibbTransport.getAttribute("block-size");
@@ -955,19 +975,20 @@ public class JingleConnection implements Transferable {
                 }
             }
             this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
+
             if (sid == null || !sid.equals(this.transportId)) {
                 Log.w(Config.LOGTAG, String.format("%s: sid in transport-accept (%s) did not match our sid (%s) ", account.getJid().asBareJid(), sid, transportId));
             }
+            respondToIq(packet, true);
             //might be receive instead if we are not initiating
             if (initiating()) {
                 this.transport.connect(onIbbTransportConnected);
             } else {
                 this.transport.receive(file, onFileTransmissionStatusChanged);
             }
-            return true;
         } else {
             Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received invalid transport-accept");
-            return false;
+            respondToIq(packet, false);
         }
     }
 
@@ -989,18 +1010,18 @@ public class JingleConnection implements Transferable {
     @Override
     public void cancel() {
         this.cancelled = true;
-        abort();
+        abort("cancel");
     }
 
-    public void abort() {
+    void abort(final String reason) {
         this.disconnectSocks5Connections();
         if (this.transport instanceof JingleInbandTransport) {
             this.transport.disconnect();
         }
-        this.sendCancel();
+        sendSessionTerminate(reason);
         this.mJingleConnectionManager.finishConnection(this);
         if (responding()) {
-            this.message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_FAILED));
+            this.message.setTransferable(new TransferablePlaceholder(cancelled ? Transferable.STATUS_CANCELLED : Transferable.STATUS_FAILED));
             if (this.file != null) {
                 file.delete();
             }
@@ -1040,11 +1061,11 @@ public class JingleConnection implements Transferable {
         this.mJingleConnectionManager.finishConnection(this);
     }
 
-    private void sendCancel() {
-        JinglePacket packet = bootstrapPacket("session-terminate");
-        Reason reason = new Reason();
-        reason.addChild("cancel");
-        packet.setReason(reason);
+    private void sendSessionTerminate(String reason) {
+        final JinglePacket packet = bootstrapPacket("session-terminate");
+        final Reason r = new Reason();
+        r.addChild(reason);
+        packet.setReason(r);
         this.sendJinglePacket(packet);
     }
 
diff --git a/src/main/java/de/pixart/messenger/xmpp/jingle/JingleConnectionManager.java b/src/main/java/de/pixart/messenger/xmpp/jingle/JingleConnectionManager.java
index addd350d2..8faf5fbc1 100644
--- a/src/main/java/de/pixart/messenger/xmpp/jingle/JingleConnectionManager.java
+++ b/src/main/java/de/pixart/messenger/xmpp/jingle/JingleConnectionManager.java
@@ -166,7 +166,7 @@ public class JingleConnectionManager extends AbstractConnectionManager {
     public void cancelInTransmission() {
         for (JingleConnection connection : this.connections) {
             if (connection.getJingleStatus() == JingleConnection.JINGLE_STATUS_TRANSMITTING) {
-                connection.abort();
+                connection.abort("connectivity-error");
             }
         }
     }
diff --git a/src/main/java/de/pixart/messenger/xmpp/jingle/JingleInbandTransport.java b/src/main/java/de/pixart/messenger/xmpp/jingle/JingleInbandTransport.java
index 30986ca0c..744a72548 100644
--- a/src/main/java/de/pixart/messenger/xmpp/jingle/JingleInbandTransport.java
+++ b/src/main/java/de/pixart/messenger/xmpp/jingle/JingleInbandTransport.java
@@ -47,10 +47,15 @@ public class JingleInbandTransport extends JingleTransport {
     private OnIqPacketReceived onAckReceived = new OnIqPacketReceived() {
         @Override
         public void onIqPacketReceived(Account account, IqPacket packet) {
-            if (connected && packet.getType() == IqPacket.TYPE.RESULT) {
+            if (!connected) {
+                return;
+            }
+            if (packet.getType() == IqPacket.TYPE.RESULT) {
                 if (remainingSize > 0) {
                     sendNextBlock();
                 }
+            } else if (packet.getType() == IqPacket.TYPE.ERROR) {
+                onFileTransmissionStatusChanged.onFileTransferAborted();
             }
         }
     };
diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index 24daff1c9..f3a5071a8 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -973,4 +973,5 @@
     <string name="intro_privacy">Your privacy\nYour sovereignty</string>
     <string name="intro_desc_privacy">Pix-Art Messenger will neither sell nor analyze your data and you decide which permissions you grant.</string>
     <string name="no_results">No results</string>
+    <string name="file_transmission_cancelled">file transmission cancelled</string>
 </resources>