Log transfer stats

app/src/main/java/com/sun/mail/iap/Protocol.java

@@ -635,6 +635,9 @@ public class Protocol {
 		// ignore it
 	    }
 	    socket = null;
+		if (traceInput != null && traceOutput != null)
+			eu.faircode.email.TrafficStatsHelper.report(host, "IMAP",
+					traceOutput.getSent(), traceInput.getReceived());
 	}
     }
 

app/src/main/java/com/sun/mail/pop3/Protocol.java

@@ -806,6 +806,9 @@ class Protocol {
 	try {
 	    if (socket != null)
 		socket.close();
+		if (traceInput != null && traceOutput != null)
+			eu.faircode.email.TrafficStatsHelper.report(host, "POP3",
+					traceOutput.getSent(), traceInput.getReceived());
 	} catch (IOException ex) {
 	    // ignore it
 	} finally {

app/src/main/java/com/sun/mail/smtp/SMTPTransport.java

@@ -1472,6 +1472,9 @@ public class SMTPTransport extends Transport {
 	    serverOutput = null;
 	    serverInput = null;
 	    lineInputStream = null;
+		if (traceInput != null && traceOutput != null)
+			eu.faircode.email.TrafficStatsHelper.report(host, "SMTP",
+					traceOutput.getSent(), traceInput.getReceived());
 	    if (super.isConnected())	// only notify if already connected
 		super.close();
 	}

app/src/main/java/com/sun/mail/util/TraceInputStream.java

@@ -33,6 +33,8 @@ public class TraceInputStream extends FilterInputStream {
     private boolean quote = false;
     private OutputStream traceOut;
 
+	private long pos = 0;
+
     /**
      * Creates an input stream filter built on top of the specified
      * input stream.
@@ -82,6 +84,7 @@ public class TraceInputStream extends FilterInputStream {
     @Override
     public int read() throws IOException {
 	int b = in.read();
+	pos++;
 	if (trace && b != -1) {
 	    if (quote)
 		writeByte(b);
@@ -100,6 +103,7 @@ public class TraceInputStream extends FilterInputStream {
     @Override
     public int read(byte b[], int off, int len) throws IOException {
 	int count = in.read(b, off, len);
+	pos += count;
 	if (trace && count != -1) {
 	    if (quote) {
 		for (int i = 0; i < count; i++)
@@ -137,4 +141,8 @@ public class TraceInputStream extends FilterInputStream {
 	    traceOut.write(b);
 	}
     }
+
+	public long getReceived() {
+		return pos;
+	}
 }

app/src/main/java/com/sun/mail/util/TraceOutputStream.java

@@ -33,7 +33,8 @@ public class TraceOutputStream extends FilterOutputStream {
     private boolean quote = false;
     private OutputStream traceOut;
 
-	private int pos = 0;
+	private long pos = 0;
+	private long base = 0;
 	private int last = 0;
 	private int total = 0;
 	private IReport reporter = null;
@@ -153,15 +154,20 @@ public class TraceOutputStream extends FilterOutputStream {
 	}
     }
 
+	public long getSent() {
+		return pos;
+	}
+
 	void report() {
-		if (reporter != null && pos - last > 1024) {
-			last = pos;
-			reporter.report(pos, total);
+		int p = (int) (pos - base);
+		if (reporter != null && p - last > 1024) {
+			last = p;
+			reporter.report(p, total);
 		}
 	}
 
 	public void setReporter(int total, IReport reporter) {
-		this.pos = 0;
+		this.base = pos;
 		this.last = 0;
 		this.total = total;
 		this.reporter = reporter;

app/src/main/java/eu/faircode/email/ApplicationEx.java

@@ -190,6 +190,7 @@ public class ApplicationEx extends Application
         if (Helper.hasWebView(this))
             CookieManager.getInstance().setAcceptCookie(false);
 
+        TrafficStatsHelper.init(this);
         EncryptionHelper.init(this);
         MessageHelper.setSystemProperties(this);
 

app/src/main/java/eu/faircode/email/TrafficStatsHelper.java

@@ -0,0 +1,38 @@
+package eu.faircode.email;
+
+/*
+    This file is part of FairEmail.
+
+    FairEmail is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    FairEmail is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with FairEmail.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2018-2021 by Marcel Bokhorst (M66B)
+*/
+
+import android.content.Context;
+
+public class TrafficStatsHelper {
+    private static Context ctx;
+
+    static void init(Context context) {
+        ctx = context;
+    }
+
+    public static void report(String host, String protocol, long sent, long received) {
+        String msg = protocol + " " + host + " tx=" + sent + " rx=" + received;
+        if (ctx == null)
+            Log.i(msg);
+        else
+            EntityLog.log(ctx, EntityLog.Type.Statistics, msg);
+    }
+}