From 4af2b29330f4ed7ba618bf9c27fc93e2d9390eb1 Mon Sep 17 00:00:00 2001
From: Christian Schneppe <christian@pix-art.de>
Date: Mon, 17 Jun 2019 21:36:39 +0200
Subject: accept direct ibb jingle offers

---
 .../messenger/xmpp/jingle/JingleConnection.java    | 68 +++++++++++++++++-----
 .../de/pixart/messenger/xmpp/jingle/Transport.java |  5 ++
 2 files changed, 58 insertions(+), 15 deletions(-)
 create mode 100644 src/main/java/de/pixart/messenger/xmpp/jingle/Transport.java

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 19c9ca8cd..33281adbb 100644
--- a/src/main/java/de/pixart/messenger/xmpp/jingle/JingleConnection.java
+++ b/src/main/java/de/pixart/messenger/xmpp/jingle/JingleConnection.java
@@ -77,6 +77,7 @@ public class JingleConnection implements Transferable {
 
     private String contentName;
     private String contentCreator;
+    private Transport initialTransport;
 
     private int mProgress = 0;
 
@@ -169,6 +170,18 @@ public class JingleConnection implements Transferable {
         return this.mFileOutputStream;
     }
 
+    private OnTransportConnected onIbbTransportConnected = new OnTransportConnected() {
+        @Override
+        public void failed() {
+            Log.d(Config.LOGTAG, "ibb open failed");
+        }
+
+        @Override
+        public void established() {
+            JingleConnection.this.transport.send(file, onFileTransmissionStatusChanged);
+        }
+    };
+
     private OnProxyActivated onProxyActivated = new OnProxyActivated() {
 
         @Override
@@ -368,9 +381,27 @@ public class JingleConnection implements Transferable {
         this.sessionId = packet.getSessionId();
         Content content = packet.getJingleContent();
         this.contentCreator = content.getAttribute("creator");
+        this.initialTransport = content.hasSocks5Transport() ? Transport.SOCKS : Transport.IBB;
         this.contentName = content.getAttribute("name");
         this.transportId = content.getTransportId();
-        this.mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
+        if (this.initialTransport == Transport.SOCKS) {
+            this.mergeCandidates(JingleCandidate.parse(content.socks5transport().getChildren()));
+        } else if (this.initialTransport == Transport.IBB) {
+            final String receivedBlockSize = content.ibbTransport().getAttribute("block-size");
+            if (receivedBlockSize != null) {
+                try {
+                    this.ibbBlockSize = Math.min(Integer.parseInt(receivedBlockSize), this.ibbBlockSize);
+                } catch (NumberFormatException e) {
+                    this.sendCancel();
+                    this.fail();
+                    return;
+                }
+            } else {
+                this.sendCancel();
+                this.fail();
+                return;
+            }
+        }
         this.ftVersion = content.getVersion();
         if (ftVersion == null) {
             this.sendCancel();
@@ -558,6 +589,14 @@ public class JingleConnection implements Transferable {
         mJingleStatus = JINGLE_STATUS_ACCEPTED;
         this.mStatus = Transferable.STATUS_DOWNLOADING;
         this.mJingleConnectionManager.updateConversationUi(true);
+        if (initialTransport == Transport.SOCKS) {
+            sendAcceptSocks();
+        } else {
+            sendAcceptIbb();
+        }
+    }
+
+    private void sendAcceptSocks() {
         this.mJingleConnectionManager.getPrimaryCandidate(this.account, new OnPrimaryCandidateFound() {
             @Override
             public void onPrimaryCandidateFound(boolean success, final JingleCandidate candidate) {
@@ -602,6 +641,17 @@ public class JingleConnection implements Transferable {
         });
     }
 
+    private void sendAcceptIbb() {
+        this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
+        final JinglePacket packet = bootstrapPacket("session-accept");
+        final Content content = new Content(contentCreator, contentName);
+        content.setFileOffer(fileOffer, ftVersion);
+        content.setTransportId(transportId);
+        content.ibbTransport().setAttribute("block-size", this.ibbBlockSize);
+        packet.setContent(content);
+        this.sendJinglePacket(packet);
+    }
+
     private JinglePacket bootstrapPacket(String action) {
         JinglePacket packet = new JinglePacket();
         packet.setAction(action);
@@ -811,18 +861,6 @@ public class JingleConnection implements Transferable {
         this.sendJinglePacket(packet);
     }
 
-    OnTransportConnected onIbbTransportConnected = new OnTransportConnected() {
-        @Override
-        public void failed() {
-            Log.d(Config.LOGTAG, "ibb open failed");
-        }
-
-        @Override
-        public void established() {
-            JingleConnection.this.transport.send(file, onFileTransmissionStatusChanged);
-        }
-    };
-
     private boolean receiveFallbackToIbb(JinglePacket packet) {
         Log.d(Config.LOGTAG, "receiving fallack to ibb");
         String receivedBlockSize = packet.getJingleContent().ibbTransport()
@@ -836,8 +874,8 @@ public class JingleConnection implements Transferable {
         this.transportId = packet.getJingleContent().getTransportId();
         this.transport = new JingleInbandTransport(this, this.transportId, this.ibbBlockSize);
         JinglePacket answer = bootstrapPacket("transport-accept");
-        Content content = new Content("initiator", "a-file-offer");
-        content.setTransportId(this.transportId);
+        final Content content = new Content(contentCreator, contentName);
+        content.setFileOffer(fileOffer, ftVersion);
         content.ibbTransport().setAttribute("block-size", this.ibbBlockSize);
         answer.setContent(content);
 
diff --git a/src/main/java/de/pixart/messenger/xmpp/jingle/Transport.java b/src/main/java/de/pixart/messenger/xmpp/jingle/Transport.java
new file mode 100644
index 000000000..23b7cf3ee
--- /dev/null
+++ b/src/main/java/de/pixart/messenger/xmpp/jingle/Transport.java
@@ -0,0 +1,5 @@
+package de.pixart.messenger.xmpp.jingle;
+
+public enum Transport {
+    SOCKS, IBB
+}
-- 
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